CN114585861A

CN114585861A - Ventilation report device and ventilation report program

Info

Publication number: CN114585861A
Application number: CN202080025135.7A
Authority: CN
Inventors: 广崎弘志; 高原英树
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2022-06-03
Anticipated expiration: 2040-08-31
Also published as: WO2022044325A1; JPWO2022044325A1; JP7403669B2; CN114585861B

Abstract

A ventilation report device for reporting ventilation of an indoor space (71) in a building (3), said ventilation report device comprising: a surface temperature detection unit (43) that detects the temperature of the main body surface of the indoor space as the main body temperature; a reporting unit (58) that reports when a report signal is transmitted; and a control unit that predicts a change amount of the room temperature of the indoor space based on the main body temperature, determines whether the indoor space is an environmental condition corresponding to natural ventilation based on the prediction and a trend of the heat load of the indoor space, and transmits a report signal for urging start of natural ventilation to the report unit based on a result of the determination.

Description

Ventilation reporting device and ventilation reporting program

Technical Field

The technology relates to ventilation reporting devices and ventilation reporting procedures. And more particularly to reports relating to the natural ventilation of indoor spaces.

Background

Conventionally, as a technology for ventilating an indoor space to be air-conditioned while air-conditioning the indoor space, there is a system that can be operated in an energy-saving manner while eliminating stuffiness by a plurality of ventilators and an air-conditioning ventilation system that air-conditions a part of the indoor space (for example, see patent literature 1).

Patent document 1: japanese patent laid-open publication No. 2015-040655

In the system of patent document 1, the air conditioner performs ventilation in conjunction with the ventilator. The ventilator adjusts the ventilation amount based on the temperature data acquired by the air conditioner, thereby solving the problem of the indoor space becoming stuffy.

Here, as a countermeasure against an infectious disease or the like, there is an increased chance that a user in an indoor space opens a window or the like to perform natural ventilation. At this time, if a window is opened, for example, when a temperature difference between the inside and the outside of the room is large, for example, when the air conditioner is operating, a heat load in the indoor space increases, and the indoor environment changes. Therefore, in order to efficiently perform natural ventilation while suppressing an increase in the thermal load, the timing of performing ventilation is important, but it is difficult for the user to grasp the timing of performing ventilation.

Disclosure of Invention

Therefore, an object of the present invention is to solve the above-described problems and to obtain a ventilation report device and a ventilation report program that perform a report that enables efficient natural ventilation of an indoor space.

A ventilation report device according to the present disclosure is a ventilation report device that reports ventilation of an indoor space in a building, and includes: a surface temperature detection unit that detects a temperature of a main body surface of the indoor space as a main body temperature; a reporting unit that reports when a report signal is transmitted; and a control unit that predicts a change amount of the room temperature of the indoor space based on the main body temperature, determines whether the indoor space is an environmental condition corresponding to natural ventilation based on the prediction and a trend of the heat load of the indoor space, and transmits a report signal for urging start of natural ventilation to the report unit based on a result of the determination.

Further, a ventilation report program according to the present disclosure is a program for performing a report related to ventilation of an indoor space in a building, the program causing a computer to perform: predicting a change amount of the room temperature from a main body temperature which is a temperature of a main body surface of the indoor space; determining whether or not the environmental condition is an environmental condition corresponding to natural ventilation from a trend of the heat load of the indoor space based on the prediction; and a step of transmitting a report signal for prompting the start of natural ventilation based on the result of the determination, and causing a report unit to report.

According to the present disclosure, the control unit predicts the amount of change in the room temperature from the data of the body temperature relating to the detection by the surface temperature detection unit, and transmits a report signal to the report unit, the report signal prompting the start of ventilation, when it is determined that the environmental condition is one that corresponds to natural ventilation based on the trend of the thermal load of the indoor space that is predicted. Therefore, it is possible to report that natural ventilation is promoted at a timing when the change in the heat load of the indoor space is small. Further, when the indoor space is being air-conditioned, energy can be saved and the air in the indoor space can be replaced.

Drawings

Fig. 1 is a diagram showing a configuration of an air conditioner 1 according to embodiment 1.

Fig. 2 is a diagram showing a configuration of an outdoor unit control unit 51 included in the air-conditioning apparatus 1 according to embodiment 1.

Fig. 3 is a diagram showing a functional configuration of the outdoor unit control unit 51 in the air conditioning apparatus 1 according to embodiment 1.

Fig. 4 is a diagram showing a situation of heat transfer in the house 3.

Fig. 5 is a diagram showing an example of the relationship between the body temperature and the room temperature.

Fig. 6 is a diagram showing an example of the relationship between the main temperature and the room temperature during the heating operation.

Fig. 7 is a diagram showing an example of the relationship between the main body temperature and the room temperature during the cooling operation.

Fig. 8 is a diagram illustrating a flow of air conditioning control processing performed by the air conditioning apparatus 1 according to embodiment 1.

Fig. 9 is a diagram showing a processing flow related to ventilation report in embodiment 3.

Fig. 10 is a diagram illustrating a change in the trend of the heat load in embodiment 3.

Fig. 11 is a diagram showing an example of the report by the report unit 58.

Fig. 12 is a diagram showing a processing flow relating to ventilation reporting according to embodiment 4.

Fig. 13 is a diagram showing a processing flow relating to ventilation reporting according to embodiment 8.

Fig. 14 is a diagram showing an air conditioning system 500 according to embodiment 9.

Detailed Description

Hereinafter, embodiments will be described in detail with reference to the drawings. Here, in the following drawings, the dimensional relationship of each component may be different from the actual one. In the drawings, the same or corresponding portions are denoted by the same reference numerals.

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

In the embodiment, the steps describing the program performing the operation are processes performed in time series along the described order, but the steps do not necessarily have to be processed in time series, and may include processes executed in parallel or independently.

The embodiments may be implemented individually or in combination. In either case, the following advantageous effects are exhibited. The various specific settings described in the embodiments are merely examples, and are not particularly limited to these.

In the embodiment, the system indicates an entire apparatus including a plurality of apparatuses or an entire function including a plurality of functions.

Embodiment mode 1

< Structure of air conditioner 1 >

Fig. 1 is a diagram showing a configuration of an air conditioner 1 according to embodiment 1. The air conditioner 1 is an apparatus for conditioning air in an indoor space 71 in a room 3 to be air-conditioned. Here, the air conditioner 1 includes each part serving as a ventilation notifying device. Air conditioning is to adjust the temperature, humidity, cleanliness, and airflow of air in the air conditioning target space, and specifically, is to heat, cool, dehumidify, humidify, or clean air.

As shown in fig. 1, the air conditioner 1 is installed in a house 3 as a building. As an example, the house 3 is a building of a so-called general single-family house. The house 3 has an indoor space 71 surrounded by a main body such as a wall or a floor. The house 3 has a window 4 that can be opened and closed (hereinafter referred to as opening and closing) at a boundary portion between the inside and outside of the indoor space 71. The air conditioner 1 is, for example, a system using CO₂A heat pump type air conditioning apparatus using a refrigerant such as carbon dioxide or HFC (hydrofluorocarbon). The air conditioner 1 is equipped with a vapor compression refrigeration cycle, and is not shownThe illustrated commercial power supply, power generation equipment, power storage equipment, or the like receives electric power and operates.

As shown in fig. 1, the air conditioner 1 includes an outdoor unit 11 installed outside the house 3, i.e., outdoors, an indoor unit 13 installed inside the house 3, i.e., indoors, and a remote controller 55 operated by a user. The outdoor unit 11 and the indoor units 13 are connected via a refrigerant pipe 61 through which a refrigerant flows and a communication line 63 through which various signals are transmitted. The air conditioner 1 is an apparatus that cools the indoor space 71 in the room 3 by discharging cold air from the indoor unit 13 and heats the indoor space 71 in the room 3 by discharging hot air, for example.

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 unit 51. On the other hand, the indoor unit 13 includes an indoor heat exchanger 25, an indoor air-sending device 33, and an indoor unit control unit 53. The refrigerant pipes 61 annularly connect the compressor 21, the four-way valve 22, the outdoor heat exchanger 23, and the expansion valve 24 of the outdoor unit 11, and the indoor heat exchanger 25 of the indoor unit 13. Thereby, a refrigeration cycle is constituted.

The compressor 21 compresses a refrigerant and circulates it in a refrigeration cycle. Specifically, the compressor 21 compresses a low-temperature and low-pressure refrigerant that is sucked in, and discharges the refrigerant that has become high-pressure and high-temperature to the four-way valve 22. The compressor 21 according to embodiment 1 includes an inverter circuit capable of changing the operating capacity according to the drive frequency. The operation capacity is an amount of refrigerant sent per unit by the compressor 21. The compressor 21 adjusts the driving frequency and changes the operating capacity in response to an instruction from the outdoor unit control unit 51.

The four-way valve 22 is provided on the discharge side of the compressor 21. The four-way valve 22 switches the direction of the refrigerant flow in the refrigerant pipe 61 depending on whether the operation of the air conditioner 1 is the cooling or dehumidifying operation or the heating operation.

The outdoor heat exchanger 23 is the 1 st heat exchanger that exchanges heat between the refrigerant flowing through the refrigerant pipe 61 and the air of the outdoor space 72 outside the space to be air-conditioned. The outdoor fan 31 is a 1 st fan that is provided near the outdoor heat exchanger 23 and that sends the air in the outdoor space 72 to the outdoor heat exchanger 23. When the outdoor fan 31 starts a blowing operation, a negative pressure is generated in the outdoor unit 11, and air in the outdoor space 72 is sucked. The sucked air is supplied to the outdoor heat exchanger 23, exchanges heat with the cooling and heating energy supplied by the refrigerant flowing through the refrigerant pipe 61, and is then discharged to the outdoor space 72.

The expansion valve 24 is provided 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 changes its opening degree in response to an instruction from the outdoor unit control unit 51, and adjusts the pressure of the refrigerant.

The indoor heat exchanger 25 is a 2 nd heat exchanger that exchanges heat between the refrigerant flowing through the refrigerant pipe 61 and the air in the indoor space 71. The indoor fan 33 is a 2 nd fan that is provided near the indoor heat exchanger 25 and sends air in the indoor space 71 to the indoor heat exchanger 25. When the indoor fan 33 starts a blowing operation, a negative pressure is generated inside the indoor unit 13, and air in the indoor space 71 is sucked. The sucked air is supplied to the indoor heat exchanger 25, exchanges heat with the cooling and heating energy supplied by the refrigerant flowing through the refrigerant pipe 61, and is then discharged to the indoor space 71.

The air heat-exchanged in the indoor heat exchanger 25 is supplied to the indoor space 71 as air-conditioned air. Thereby, the indoor space 71 is cooled or heated. The greater the amount of heat exchange between the refrigerant and the air in the indoor heat exchanger 25, the higher the air conditioning capacity of the air conditioning apparatus 1. Here, the air conditioning capacity is an index indicating the intensity of air conditioning performed by the air conditioner 1. Hereinafter, the air conditioning capacity during cooling is referred to as cooling capacity, and the air conditioning capacity during heating is referred to as heating capacity.

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

The outdoor unit 11 includes an outdoor temperature detection unit 42. The outdoor temperature detecting unit 42 is an outside air temperature detecting unit that has a temperature sensor such as a temperature measuring resistor, a thermistor, or a thermocouple, and detects the temperature of air outside the indoor space 71 (hereinafter referred to as the outside air temperature) sucked by the outdoor air blower 31.

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

The surface temperature detecting unit 43 has an infrared sensor such as a pyroelectric type or a thermopile type, and detects the surface temperature of the subject by detecting infrared rays emitted from the subject. The surface temperature detection unit 43 according to embodiment 1 is provided at a position where it can detect infrared rays radiated from a wall, a floor, or the like of the indoor space 71, and detects the surface temperature of surrounding objects including the wall, the floor, and the like. In embodiment 1, the surface temperature to be detected by the surface temperature detecting unit 43 is the bulk temperature of the bulk surface of the indoor space 71 surrounding the indoor space 71 and dividing the indoor space 71 into the inside and the outside.

The window opening/closing detection unit 45 detects opening/closing of the window 4. The detection of the opening and closing of the window 4 is not particularly limited. The window opening/closing detection unit 45 has an infrared sensor such as a pyroelectric sensor or a thermopile sensor, and determines the area of the window 4 in the indoor space 71 based on the temperature difference with the wall of the house 3 or the like. Then, the amount of change in the temperature of the area of the window 4 is detected, and when the outside air temperature, which is the temperature outside the indoor space 71, is high, and there is a change from the threshold value obtained from the difference from the previous image, the outside air temperature, the current room temperature, the current surface temperature of the window 4, and the like, it is determined that the window 4 is open. When the outside air temperature is low, similarly, if there is a change amount from the threshold value obtained from the difference from the previous image, the outside air temperature, the current room temperature, the current surface temperature of the window 4, and the like, it is determined that the window 4 is open. Note that the temperature before the window 4 is opened is stored in advance, and when the temperature returns to the threshold value or less, it is detected that the window 4 is closed.

In addition, the window opening/closing detection unit 45 may use CO₂Etc. VOC gas sensors, etc. When the air conditioner 1 is operated, the window 4 and the like are basically closed. Therefore, when the VOC gas sensor changes to a value equal to or higher than a threshold value at which a person enters/leaves a room, it is possible to detect that the window 4 is opened.

The solar radiation amount detection unit 47 has an infrared sensor of a pyroelectric type, a thermopile type, or the like, and detects the amount of solar radiation or the like incident on the indoor space 71 via the window 4 or the like. Here, a case where the indoor unit 13 includes the solar radiation amount detection unit 47 will be described. However, for example, by providing the insolation amount detection unit 47 near the window 4 or in a place where the insolation amount can be detected, such as the outdoor space 72, the insolation amount of the wall of the house 3 or the like can be detected, and more accurate insolation amount detection can be performed.

The human body detection unit 49 has an infrared sensor such as a pyroelectric sensor or a thermopile sensor, and detects whether or not a human is present in the indoor space 71.

The notification unit 58 has a device for performing a notification, and notifies a person in the indoor space 71 based on a notification signal transmitted from the control unit 101 or the like, as described later. The device for giving the report is, for example, a sound generating device such as a buzzer or a light emitting device such as an LED lamp. The notification unit 58 may be a device provided in the indoor unit 13, or a display device provided in a remote controller 55 described later may be the notification unit 58. However, the present invention is not limited to these devices.

The wireless communication section 59 has a wireless communication device. The wireless communication unit 59 can perform wireless communication using Wi-Fi (registered trademark) or the like, for example, to transmit a signal to an external device (not shown) other than the air conditioner 1, and perform various kinds of reports and the like. The external device is, for example, a smartphone, a smart speaker, or the like.

Here, the air conditioner 1 includes detection units (not shown) 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. For example, the air conditioner 1 includes a discharge-side pressure detecting unit that is provided on the discharge side of the compressor 21 and detects the pressure of the refrigerant discharged from the compressor 21. The air conditioner 1 further includes a suction-side pressure detection unit that is provided on the suction side of the compressor 21 and detects the pressure of the refrigerant sucked into the compressor 21. The air conditioner 1 further includes a discharge-side temperature detector that is provided on the discharge side of the compressor 21 and detects the temperature of the refrigerant discharged from the compressor 21. The air conditioner 1 further includes a suction-side temperature detector that is provided on the suction side of the compressor 21 and detects the temperature of the refrigerant sucked into the compressor 21.

Signals relating to detection by various detection units including 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 are transmitted to the indoor unit control unit 53. The indoor unit control unit 53 transmits a signal including data related to detection to the outdoor unit control unit 51 via the communication line 63. Then, the indoor unit control unit 53 performs processing such as determination of natural ventilation based on data related to detection. The indoor unit control unit 53 transmits a report signal based on the processing to the report unit 58 or the wireless communication unit 59. The reporting unit 58 or the wireless communication unit 59 performs reporting based on the report signal. Therefore, the air conditioner 1 is not only an air conditioner but also a ventilation reporting device. The outdoor unit control unit 51 and the indoor unit control unit 53 are control units of a ventilation report device that performs processing related to reporting of natural ventilation by a cooperative operation.

Fig. 2 is a diagram showing a configuration of an outdoor unit control unit 51 included in the air-conditioning apparatus 1 according to embodiment 1. Fig. 2 shows a configuration of components (hardware) in the outdoor unit control unit 51. The outdoor unit controller 51 mainly controls the operation of the outdoor unit 11. Here, the outdoor unit control unit 51 serves as a control unit of the ventilation notifying device as described above. As shown in fig. 2, the outdoor unit control unit 51 includes a control unit 101, a storage unit 102, a timer unit 103, and a communication unit 104. Each portion 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 called a central processing unit, a processor, a microprocessor, a microcomputer, a dsp (digital Signal processor), or the like. The CPU reads out programs and data stored in the ROM, the storage unit 102, or the like, and uses the RAM as a work area in the control unit 101 to collectively control the entire outdoor unit control unit 51.

The storage unit 102 functions as a so-called secondary storage device or an auxiliary storage device. The storage unit 102 is a nonvolatile semiconductor memory such as a flash memory, an eprom (Erasable Programmable rom), an eeprom (electrically Erasable Programmable rom), or the like. The storage unit 102 stores programs and data used by the control unit 101 to perform various processes, and data generated or acquired by the control unit 101 by 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 timer unit 103 is a device for performing timing. The timer unit 103 includes rtc (real Time clock), and can continue to count Time even when the air conditioner 1 is powered off.

The communication unit 104 is a device serving 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 a signal including, for example, an operation instruction input from the user to the remote controller 55 and data related to detection by the indoor unit control unit 53 including various detection units, and transmits the signal to the control unit 101. The communication unit 104 transmits a signal relating to an instruction to the indoor unit 13 by the processing of the control unit 101, a report signal to be reported to the user, and the like.

Next, the indoor unit control unit 53 will be explained. The indoor unit control unit 53 includes a CPU, a ROM, a RAM, a communication interface, and a readable and writable nonvolatile semiconductor memory (not shown) as in the outdoor unit control unit 51 shown in fig. 2. The CPU of the indoor unit control unit 53 uses the RAM as a work memory and executes a control program stored in the ROM, thereby controlling the operation of the indoor unit 13. The indoor unit 13 also receives signals including data related to detection from various detection units, and transmits the signals to the outdoor unit control unit 51.

As described above, the outdoor unit control unit 51 is connected to the indoor unit control unit 53 via the communication line 63, which is a wired, wireless, or other communication medium. The outdoor unit control unit 51 controls the entire air conditioning apparatus 1 by sending and receiving various signals through the communication line 63 and operating in cooperation with the indoor unit control unit 53. In this way, the outdoor unit control unit 51 functions as a device for controlling the air conditioner 1.

The outdoor unit control unit 51 and the indoor unit control unit 53 control the operation of the air conditioning unit of the air conditioning apparatus 1 based on data relating to the detection by the room temperature detection unit 41, the surface temperature detection unit 43, and other detection units (not shown) and setting data of the air conditioning apparatus 1 set by the user. Specifically, for example, the outdoor unit control unit 51 controls the driving frequency of the compressor 21, the switching of the four-way valve 22, the rotation speed of the outdoor fan 31, the opening degree of the expansion valve 24, and the like. The indoor unit control unit 53 controls the rotation speed of the indoor fan 33, and the like. Here, the outdoor unit control unit 51 may control the rotation speed of the indoor fan 33. The indoor-unit control unit 53 may control the driving frequency of the compressor 21, the switching of the four-way valve 22, the rotation speed of the outdoor fan 31, the opening degree of the expansion valve 24, and the like. In this way, the outdoor unit control unit 51 and the indoor unit control unit 53 output various operation commands to the devices of the air conditioning unit in accordance with the operation command given to the air conditioning apparatus 1.

In addition, a remote controller 55 is disposed in the indoor space 71. The 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 the indoor unit control unit 53 provided in the indoor unit 13. For example, the user of the air conditioner 1 operates the remote controller 55 to input an operation command to the air conditioner 1. Examples of the operation command include a command for switching between operation and stop, a command for switching between operation modes (cooling, heating, dehumidification, humidification, air cleaning, air blowing, and the like), a command for switching between target temperatures, a command for switching between target humidities, a command for switching between air volumes, a command for switching between air directions, and a command for switching between timers. The air conditioner 1 mainly performs an operation related to air conditioning in accordance with an input operation command.

< refrigeration cycle in refrigeration operation >

Here, an operation of the air conditioning unit related to air conditioning will be described. First, the operation mode of "cooling" will be described. Upon receiving an operation command for "cooling" 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. The outdoor unit control unit 51 opens the expansion valve 24 and drives the compressor 21 and the outdoor fan 31. When receiving the operation command of "cooling", the indoor unit control unit 53 drives the indoor fan 33.

When the compressor 21 is driven, the refrigerant discharged from the compressor 21 flows into the outdoor heat exchanger 23 through the four-way valve 22. The refrigerant flowing into the outdoor heat exchanger 23 exchanges heat with outdoor air sucked from the outdoor space 72, condenses and liquefies, and flows into the expansion valve 24. The refrigerant flowing into the expansion valve 24 is decompressed by the expansion valve 24 and then flows into the indoor heat exchanger 25. The refrigerant flowing into the indoor heat exchanger 25 exchanges heat with indoor air sucked from the indoor space 71, evaporates, and is sucked into the compressor 21 again through the four-way valve 22. The indoor air sucked from the indoor space 71 is cooled in the indoor heat exchanger 25 by the flow of the refrigerant. The amount of heat exchange between the refrigerant and the indoor air in the indoor heat exchanger 25 is referred to as cooling capacity.

< refrigeration cycle in heating operation >

Next, an operation mode of "heating" will be described. When receiving an operation command of "heating" 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. The outdoor unit control unit 51 opens the expansion valve 24, and drives the compressor 21 and the outdoor fan 31. When receiving the operation command of "heating", the indoor unit control unit 53 drives the indoor fan 33.

When the compressor 21 is driven, the refrigerant discharged from the compressor 21 flows into the indoor heat exchanger 25 through the four-way valve 22. The refrigerant flowing into the indoor heat exchanger 25 exchanges heat with indoor air taken in from the indoor space 71, condenses and liquefies, and flows into the expansion valve 24. The refrigerant flowing into the expansion valve 24 is decompressed 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 outdoor air sucked from the outdoor space 72, evaporates, and is sucked into the compressor 21 again through the four-way valve 22. The indoor air sucked from the indoor space 71 is heated in the indoor heat exchanger 25 by the flow of the refrigerant. The amount of heat exchange between the refrigerant and the indoor air in the indoor heat exchanger 25 is referred to as heating capacity.

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

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

The air temperature acquiring unit 310 acquires the room temperature of the indoor space 71 as data. Here, the air temperature acquiring unit 310 acquires the room temperature detected by the room temperature detecting unit 41 provided in the indoor unit 13.

Here, the room temperature detector 41 periodically transmits a signal including temperature data indicating the detected room temperature to the outdoor unit controller 51 via the indoor unit controller 53 and the communication line 63 at a predetermined cycle. Here, the room temperature detecting unit 41 periodically transmits a signal, but the air temperature acquiring unit 310 may request the room temperature detecting unit 41 as needed, and the room temperature detecting unit 41 may transmit a signal including temperature data in response to the request. In this way, the air temperature acquisition unit 310 acquires the room temperature data of the indoor space 71 from the room temperature detection unit 41. Therefore, the air temperature acquisition unit 310 is realized by the cooperation of the control unit 101 and the communication unit 104. The air temperature acquisition unit 310 functions as an air temperature acquisition means.

The surface temperature obtaining unit 320 obtains the surface temperature of the main body of the indoor space 71. The main body of the indoor space 71 is a structure such as a wall, a floor, a ceiling, and a column that surrounds the indoor space 71 in the house 3. The surface temperature acquisition unit 320 acquires the surface temperature data detected by the surface temperature detection unit 43 as the surface temperature of the main body of the indoor space 71.

The surface temperature detecting unit 43 described above periodically transmits a signal including data of the detected surface temperature, i.e., the main body temperature, to the outdoor unit control unit 51 via the indoor unit control unit 53 and the communication line 63 at a predetermined cycle. Here, the surface temperature acquisition unit 320 periodically transmits a signal, but the surface temperature acquisition unit 320 may transmit a request to the surface temperature detection unit 43 as needed, and the surface temperature detection unit 43 may transmit a signal including the body temperature data in response to the request. In this way, the surface temperature acquisition unit 320 acquires the body temperature data of the indoor space 71 detected by the surface temperature detection unit 43 from the surface temperature detection unit 43. The surface temperature acquisition unit 320 is realized by the cooperation of the control unit 101 and the communication unit 104. The surface temperature obtaining unit 320 functions as a surface temperature obtaining means.

The air conditioning control section 330 controls the equipment of the air conditioning section, and controls the air conditioning of the indoor space 71. The air-conditioning control unit 330 communicates with the indoor-unit control unit 53 via the communication unit 104, and causes the air-conditioning unit to perform air conditioning in cooperation with the indoor-unit control unit 53. 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, the outdoor fan 31, and the indoor fan 33. The air conditioning control unit 330 is realized by the cooperation of the control unit 101, the timer unit 103, and the communication unit 104. The air conditioning control unit 330 functions as an air conditioning control means.

The air conditioning control unit 330 stops the driving of the compressor 21 when it is determined that the room temperature reaches the thermal cut-off point Toff based on the room temperature data acquired by the air temperature acquisition unit 310. Further, the air conditioning control unit 330 starts driving the compressor 21 when it is determined that the room temperature reaches the hot-on point Ton based on the room temperature data acquired by the air temperature acquisition unit 310. The thermal cutoff point Toff is a temperature at which the compressor 21 should stop driving, which is set to prevent excessive air conditioning. The heat-on point Ton is a temperature at which the compressor 21 that has stopped operating should start driving again. Hereinafter, the stop and start of the driving of the compressor 21 are referred to as "thermal off" and "thermal on", respectively. In addition, the thermal disconnection point Toff and the thermal conduction point Ton are referred to as a "thermal disconnection point Toff" and a "thermal conduction point Ton", respectively.

The room temperature reaching the thermal cutoff point Toff means that the room temperature rises from a temperature lower than the thermal cutoff point Toff to above the thermal cutoff point Toff, or the room temperature falls from a temperature higher than the thermal cutoff point Toff to below the thermal cutoff point Toff. Similarly, the room temperature reaching the thermal on-point Ton means that the room temperature rises from a temperature lower than the thermal on-point Ton to a temperature higher than the thermal on-point Ton, or the room temperature falls from a temperature higher than the thermal on-point Ton to a temperature lower than the thermal on-point Ton.

To describe in more detail, the air conditioning control unit 330 starts driving the compressor 21 when it is determined that the room temperature reaches the thermal cut-off point Toff based on the room temperature data acquired by the air temperature acquisition unit 310 and the prohibition time elapses from the stop of driving the compressor 21.

Here, the prohibition time is a time required from the stop of the driving of the compressor 21 to the restart of the driving, and is set for the purpose of protecting the compressor 21. Immediately after the stop of the driving of the compressor 21, the motor cannot rotate because the pressure difference in the refrigeration cycle is large. In such a state, if the compressor 21 is driven, a failure occurs. Therefore, the prohibition time for prohibiting the start of the operation immediately after the stop of the driving is set in the compressor 21. The prohibition time is set to, for example, a time from several tens of seconds to several minutes. Since such prohibition time is defined, even if the room temperature reaches the hot-on point Ton, the air conditioning control unit 330 does not start driving the compressor 21 until the prohibition time elapses since the stop of driving the compressor 21. Therefore, depending on the surrounding environment, the room temperature may change during the period from the time when the prohibition time elapses after the compressor 21 stops driving until the operation can be resumed, and the comfort of the indoor space 71 may decrease.

Here, the setting unit 340 sets the temperature to the hot cutoff point Toff based on the body temperature, as will be described later. The setting unit 340 is connected to the reporting unit 58, and performs processing related to reporting of natural ventilation. The setting unit 340 is implemented by the control unit 101. The setting unit 340 functions as a setting unit.

The index acquisition unit 350 acquires data relating 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 the room temperature of the indoor space 71 (hereinafter referred to as the amount of change in the room temperature). Specifically, data included in signals from the outdoor temperature detection unit 42, the window opening/closing detection unit 45, the solar radiation amount detection unit 47, and the human body detection unit 49 is acquired.

< parameter calculated at room temperature >

The room temperature after the compressor 21 stops driving varies depending on the surrounding environment. Here, important factors affecting the room temperature will be explained.

Fig. 4 is a diagram showing a situation of heat transfer in the house 3. As shown in fig. 4, heat moves between the indoor space 71 and the outdoor space 72 through the wall of the house 3, the window 4, the gap, the ventilator, and the like. As a result of such heat transfer, the room temperature of the indoor space 71 varies depending on various factors. In summary, the room temperature of the indoor space 71 is set as equation (1) as a function of the main body temperature of the indoor space 71, the internal heat generation of the indoor space 71, the inflow heat of the air from the outdoor space 72 to the indoor space 71, the areas of the walls and the floor of the indoor space 71, and time.

Room temperature (body temperature, internal heat generation, air inflow heat, area of walls and floor, time) … (1)

The main body temperature of the indoor space 71 is the surface temperature of the main body such as the wall, floor, ceiling, and pillar of the indoor space 71, and is detected by the surface temperature detecting unit 43 and acquired by the surface temperature acquiring unit 320 as described above. The main body temperature is set as equation (2) as a function of the temperature of the outer wall of the house 3, the solar radiation through the window 4 of the indoor space 71, the heat insulating performance of the indoor space 71, and the time.

Function (temperature of outer wall, sunshine passing through window 4, heat insulation performance, time) … (2)

The temperature of the outer wall is a function of sun exposure, outside air temperature, and time. In other words, the main body of the indoor space 71 is heated from the sunshine and the outside air via the outer wall of the house 3. Further, the main body of the indoor space 71 is directly heated by sunlight passing through the window 4. The insolation 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 from the solar heat acquisition rate indicating the ease of entry of solar radiation from the window 4 into the indoor space 71. Here, as the solar heat acquisition rate, a μ value as a solar radiation acquisition coefficient or an η a value as an average skin solar radiation acquisition rate can be used. The heat insulating performance of the indoor space 71 can be estimated from the heat flow rate indicating the ease of heat conduction. As the heat penetration rate, a UA value as an average heat penetration rate of the outer skin or a Q value as a heat loss coefficient can be used.

The amount of heat generated inside the indoor space 71 is heat generated from a person, lighting, a heater, and the like present inside the indoor space 71. The internal heat generation amount is set as equation (3) as a function of the number of persons in the indoor space 71, that is, the number of persons in the indoor space, and the respective heat generation amounts from the lighting, the household electrical appliance, and the combustion appliance provided in the indoor space 71.

… (3) function of internal heat value (number of people in room, lighting, household electrical appliances, combustion appliances)

The heat of the air flowing from the outdoor space 72 into the indoor space 71 is the heat of the air flowing from the outdoor space 72 into the indoor space 71 through the window 4, the door, the slit, the ventilation equipment, and the like of the house 3. The air inflow heat is set as equation (4) as a function of the air volume of the outdoor space 72, the outside air temperature, the room temperature of the room adjacent to the indoor space 71, and the area corresponding to the gap indicating the airtightness of the indoor space 71. Here, the gap equivalent area is also referred to as a C value.

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

Fig. 5 is a diagram showing an example of the relationship between the body temperature and the room temperature. Fig. 5 shows a difference in change in room temperature due to a difference in main body temperature after stopping the driving of the compressor 21 during the heating operation. The room temperature of the indoor space 71 changes under the influence of various parameters, but changes most under the influence of the main body temperature in a short period of time. In fig. 5, a solid line indicates a change in the room temperature in the case where the temperature of the main body in the indoor space 71 is relatively high. In addition, the broken line indicates a change in the room temperature when the temperature of the main body in the indoor space 71 is relatively low.

As shown in fig. 5, when the body temperature is relatively low, the room temperature after the compressor 21 stops driving is greatly lowered by increasing to the thermal cut-off point Toff, as compared with the case where the body temperature is relatively high. This is because, during the heating operation, the room temperature immediately after the thermal shutdown rapidly decreases to the same level as the main body temperature, and thereafter, gradually decreases to the same level as the main body temperature. Therefore, as shown in fig. 5, if the drive of the compressor 21 is stopped at the same hot cut-off point Toff, when the body temperature is relatively low, the possibility that the room temperature changes beyond the hot cut-on point Ton while the prohibition time0 is being passed becomes higher than when the body temperature is relatively high. When the room temperature changes with the temperature on point Ton, the temperature becomes too low during heating and becomes too high during cooling. Therefore, the comfort of the indoor space 71 is reduced.

In this way, in order to suppress the change in the room temperature beyond the hot on point Ton while the prohibition time0 is passing, the setting portion 340 shown in fig. 3 sets a different hot off point Toff according to the body temperature. Specifically, the setting unit 340 sets the hot cutoff point Toff to a high temperature when the body temperature is low, based on the body temperature acquired by the surface temperature acquisition unit 320. In other words, when the body temperature is the 1 st temperature, the setting portion 340 sets the thermal cut-off point Toff to a higher temperature than when the body temperature is the 2 nd temperature higher than the 1 st temperature.

To explain in more detail, the setting unit 340 predicts the amount of change in the room temperature until the elapse of the prohibition time required from the stop of the driving of the compressor 21 to the restart of the driving of the compressor 21, based on the body temperature acquired by the surface temperature acquisition unit 320. Generally, the larger the difference between the room temperature and the body temperature, the larger the amount of change in the room temperature in the prohibited time. For example, in the heating operation, the lower the main body temperature, the larger the amount of change in the room temperature, and in the cooling operation, the higher the main body temperature, the larger the amount of change in the room temperature.

The setting unit 340 uses the above expression (1) to predict the amount of change in the room temperature from the stop of the driving of the compressor 21 to the elapse of the prohibition time. As in the above equation (1), the room temperature is determined by a plurality of parameters including the body temperature and the time. Here, the parameters of heat generation, air inflow heat, and the area of the wall and the floor included in the above expression (1) may be predetermined values or values related to detection by a sensor.

The setting portion 340 predicts the amount of change in the room temperature within the prohibition time, and sets the thermal cutoff point Toff based on the predicted amount of change. Specifically, the setting unit 340 sets the thermal cutoff point Toff to a temperature obtained by adding or subtracting the predicted amount of change to or from the thermal cutoff point Ton, which is the set temperature. During the heating operation, the setting unit 340 sets the hot cutoff point Toff to a temperature obtained by adding the predicted amount of change in the room temperature to the hot cutoff point Ton. Thereby, the room temperature is lowered to the thermal turn-on point Ton at the time when the prohibition time after the thermal turn-off ends. In contrast, during the cooling operation, the setting unit 340 sets the hot cutoff point Toff to a temperature obtained by subtracting the predicted amount of change in the room temperature from the hot cutoff point Ton. Thereby, the room temperature rises to the thermal on point Ton at the time when the prohibition time after the thermal disconnection ends.

Fig. 6 is a diagram showing an example of the relationship between the main temperature and the room temperature during the heating operation. Fig. 7 is a diagram showing an example of the relationship between the main body temperature and the room temperature during the cooling operation. The air conditioning control unit 330 stops the driving of the compressor 21 in accordance with the thermal cutoff point Toff set by the setting unit 340. In fig. 6 and 7, the broken line indicates a change in the room temperature when the temperature of the main body in the indoor space 71 is relatively low, specifically, when the temperature of the main body is the 1 st temperature. In contrast, the solid line indicates a change in the room temperature when the main body temperature in the indoor space 71 is relatively high, specifically, when the main body temperature is the 2 nd temperature higher than the 1 st temperature.

As shown in fig. 6, during the heating operation, the setting portion 340 sets the thermal cutoff point Toff1 and the thermal cutoff point Toff2 to a temperature higher than the thermal on point Ton. The setting unit 340 sets the hot cutoff point Toff1 at a relatively low body temperature to a higher temperature than the hot cutoff point Toff2 at a relatively high body temperature. When the temperature of the main body is relatively low and the room temperature rises to the thermal cut-off point Toff1, the air conditioning control unit 330 stops the driving of the compressor 21 and performs thermal cut-off. When the main body temperature is relatively high, if the room temperature rises to a thermal cutoff point Toff2 lower than the thermal cutoff point Toff1, the air conditioning control unit 330 stops the driving of the compressor 21 and performs thermal cutoff. Here, hereinafter, the thermal cut-off point Toff1 and the thermal cut-off point Toff2 may be referred to as a 1 st drive stop temperature and a 2 nd drive stop temperature, respectively.

After the thermal shutdown, the lower the bulk temperature, the more greatly the room temperature decreases. At this time, the amount of change in the room temperature within the prohibited time0 is predicted to set the thermal disconnection point Toff1 and the thermal disconnection point Toff 2. Therefore, the room temperature is lowered to the thermal turn-on point Ton as the set temperature at the time when the prohibition time0 ends. When the room temperature decreases to the heat turn-on point Ton, the air conditioning control unit 330 starts driving the compressor 21 and turns on the heat. Thereby, the room temperature starts to rise again. Thus, the room temperature is maintained at a temperature equal to or higher than the set temperature regardless of the temperature of the main body.

On the other hand, during the cooling operation, as shown in fig. 7, the setting unit 340 sets the hot cutoff point Toff1 and the hot cutoff point Toff2 to a temperature lower than the hot on point Ton. The setting unit 340 sets the hot cutoff point Toff1 at a relatively low body temperature to a higher temperature than the hot cutoff point Toff2 at a relatively high body temperature. When the main temperature is relatively low, if the room temperature decreases to the thermal cut-off point Toff1, the air conditioning control unit 330 stops the driving of the compressor 21 and performs thermal cut-off. When the body temperature is relatively high, if the room temperature decreases to a thermal cutoff point Toff2 lower than the thermal cutoff point Toff1, the air conditioning control unit 330 stops the driving of the compressor 21 and performs thermal cutoff.

After the thermal shutdown, the room temperature rises more greatly as the body temperature increases. At this time, the amount of change in the room temperature within the prohibited time0 is predicted to set the thermal disconnection point Toff1 and the thermal disconnection point Toff 2. Therefore, the room temperature rises to the thermal turn-on point Ton as the set temperature at the time when the prohibition time ends. When the room temperature rises to the heat turn-on point Ton, the air conditioning control unit 330 starts the driving of the compressor 21 and turns on the heat. Thereby, the room temperature starts to decrease again. Thus, the room temperature is maintained at a temperature equal to or lower than the set temperature regardless of the temperature of the main body.

Fig. 8 is a diagram illustrating a flow of an air conditioning control process performed by the air conditioning apparatus 1 according to embodiment 1. The control unit 101 of the air conditioner 1 executes the air conditioning control process shown in fig. 8 when the air conditioner 1 heats or cools 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 in the prohibition time after the thermal disconnection, based on the body temperature detected by the surface temperature detection unit 43 (step S1). The prohibition time is a time defined to protect the compressor 21 so as not to restart the compressor 21 immediately after the hot shutdown. When the driving of the compressor 21 is stopped, the control unit 101 predicts how much the room temperature has changed within the prohibition time. Specifically, the control unit 101 predicts that the room temperature change amount is larger as the main temperature is lower in the heating operation of the air conditioner 1, and that the room temperature change amount is larger as the main temperature is higher in the cooling operation.

When the amount of change in the room temperature within the prohibition time is predicted, the control unit 101 adjusts the thermal disconnection point Toff according to the predicted amount of change in the room temperature (step S2). Specifically, the control unit 101 sets the thermal cutoff point Toff to a temperature obtained by adding the predicted amount of change in the room temperature to the thermal cutoff point Ton during the heating operation. Further, the control unit 101 sets the thermal cutoff point Toff to a temperature obtained by subtracting the predicted amount of change in the room temperature from the thermal conduction point Ton during the cooling operation. In steps S1 and S2, the controller 101 functions as the setting unit 340.

When the thermal cutoff point Toff is adjusted, the control unit 101 refers to the room temperature detected by the room temperature detecting unit 41 to determine whether or not the room temperature reaches the thermal cutoff point Toff (step S3). Specifically, when the room temperature rises to a temperature equal to or higher than the thermal cutoff point Toff during heating, the control unit 101 determines that the room temperature has reached the thermal cutoff point Toff. On the other hand, when the room temperature decreases to a temperature equal to or lower than the thermal cutoff point Toff during cooling, the control unit 101 determines that the room temperature has reached the thermal cutoff point Toff.

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

On the other hand, when it is determined that the room temperature has reached the thermal cut-off point Toff (yes in step S3), the control unit 101 performs thermal cut-off of the air conditioning unit (step S4). Specifically, the control unit 101 controls the compressor 21 to change the rotation speed to 0, thereby stopping the driving of the compressor 21. Thereby, the air conditioning of the indoor space 71 by the air conditioner 1 is stopped.

When the air conditioning portion is thermally turned off, the control portion 101 refers to the room temperature detected by the room temperature detecting portion 41 to determine whether or not the room temperature has reached the thermal conduction point Ton (step S5). Specifically, when the room temperature is decreased to a temperature equal to or lower than the thermal contact point Ton during heating, the control unit 101 determines that the room temperature has reached the thermal contact point Ton. In contrast, when the room temperature rises to a temperature equal to or higher than the thermal contact point Ton at the time of cooling, the control portion 101 determines that the room temperature has reached the thermal contact point Ton.

If the room temperature does not reach the thermal on point Ton (no in step S5), control unit 101 stays in step S5 and waits until the room temperature reaches the thermal on point Ton.

In contrast, when the room temperature reaches the thermal conduction point Ton (step S5: yes), the control unit 101 further determines whether or not the prohibition time has elapsed since the air conditioning unit thermally disconnected (step S6). Specifically, the control unit 101 determines whether or not the elapsed time from the thermal disconnection of the air conditioning unit exceeds a predetermined prohibition time based on the time counted by the timer unit 103.

If it is determined that the prohibition time has not elapsed since the air-conditioning unit was thermally disconnected (no in step S6), control unit 101 stays in step S6 and waits until the prohibition time has elapsed since the air-conditioning unit was thermally disconnected. In other words, even if the room temperature reaches the thermal on point Ton, the control unit 101 does not cause the air conditioning unit to perform thermal on unless the prohibition time elapses since the air conditioning unit performs thermal off.

On the other hand, if it is determined that the prohibition time has elapsed since the air-conditioning unit was turned off (yes in step S6), control unit 101 turns the air-conditioning unit on (step S7). Specifically, the control unit 101 controls the compressor 21 to change the rotation speed to a value corresponding to the set temperature, thereby starting the driving of the compressor 21. Thereby, the air conditioner 1 starts air conditioning of the indoor space 71. Here, in steps S3 to S7, the controller 101 functions as the air conditioning controller 330.

When the air-conditioning unit is thermally turned off, 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 repeats the following processing: the thermal cutoff point Toff is changed according to the body temperature, and the air conditioning unit is thermally turned off when the room temperature reaches the thermal cutoff point Toff, and is thermally turned on when the room temperature reaches the thermal turn-on point Ton.

As described above, in the air conditioner 1 according to embodiment 1, when the room temperature reaches the hot off point Toff, the driving of the compressor 21 is stopped, and when the room temperature reaches the hot on point Ton, the driving of the compressor 21 is started, thereby air-conditioning the indoor space 71. At this time, when the temperature of the main body in the indoor space 71 is relatively low, the air conditioner 1 sets the thermal cutoff point Toff to a higher temperature than when the temperature of the main body in the indoor space 71 is relatively high, and thereby adjusts the temperature of the thermal cutoff point Toff according to the temperature of the main body.

By adjusting the thermal cutoff point Toff in accordance with the body temperature in this way, it is possible to suppress a change in the room temperature beyond the thermal cutoff point Ton, which is the set temperature, during the period immediately after the thermal cutoff when the prohibition time during which the compressor 21 cannot be restarted elapses. Therefore, the comfort in the indoor space 71 can be improved. In addition, when the amount of change in the room temperature is predicted to be small, the control unit 101 can stop the driving of the compressor 21 at an early stage. Therefore, the air conditioner 1 according to embodiment 1 can reduce the power consumption for air conditioning.

Embodiment mode 2

Next, the air conditioner 1 according to embodiment 2 will be explained. The air conditioner 1 according to embodiment 1 predicts the amount of change in the room temperature based on the body temperature, and adjusts the thermal cutoff point Toff. In contrast, the air conditioning apparatus 1 according to embodiment 2 performs processing including data of the outside air temperature acquired by the outdoor temperature detecting unit 42 as an index for the outdoor unit control unit 51 to predict the amount of change in the room temperature.

As shown in fig. 4 and (2) described in embodiment 1, the temperature of the main body of the indoor space 71 changes due to heat from the temperature of the outer wall of the house 3. The temperature of the outer wall of the house 3 changes by heat from the outside air temperature. Therefore, the main body temperature of the indoor space 71 varies according to the outside air temperature. For example, when the outside air temperature rises, the main body temperature rises with a delay of several hours, and when the outside air temperature falls, the main body temperature gradually falls. Thus, the change in the temperature of the main body can be predicted by the outside air temperature. Therefore, by obtaining the outside air temperature, the amount of change in the room temperature of the indoor space 71 can be predicted in anticipation of a longer time than when only the main body temperature is used.

The setting unit 340 of embodiment 2 sets the hot cutoff point Toff based on the data of the body temperature acquired by the surface temperature acquiring unit 320 and the outside air temperature acquired by the index acquiring unit 350. Specifically, the setting unit 340 sets the hot cutoff point Toff to a higher temperature as the body temperature is lower, as in the setting unit 340 of embodiment 1. On the other hand, if the body temperature is the same, the setting unit 340 sets the temperature of the thermal cutoff point Toff so that the case where the outside air temperature is relatively low is higher than the case where the outside air temperature is relatively high. The air conditioning controller 330 thus stops the driving of the compressor 21 at the thermal cutoff point Toff set by the setting unit 340 based on the body temperature and the outside air temperature.

On the other hand, during the cooling operation, the setting unit 340 sets the hot cutoff point Toff1 and the hot cutoff point Toff2 to a temperature lower than the hot on point Ton. The setting unit 340 sets the hot cutoff point Toff1 at a relatively low outside air temperature to a higher temperature than the hot cutoff point Toff2 at a relatively high outside air temperature. In this way, the thermal cutoff point Toff1 and the thermal cutoff point Toff2 are set according to the outside air temperature, whereby the compressor 21 is stopped early in the case where a decrease in the room temperature due to a low outside air temperature is predicted. This can suppress supercooling of the indoor space 71, improve comfort, and reduce power consumption. In addition, when it is predicted that the room temperature increases due to a high outside air temperature, the compressor 21 is operated for a long time. Therefore, the air conditioner 1 can sufficiently cool.

As described above, the air conditioning apparatus 1 according to embodiment 2 adjusts the hot cutoff point Toff and the hot cutoff point Toff according to the body temperature and the outside air temperature based on the body temperature and the outside air temperature. By setting the thermal cut-off point using the outside air temperature, the change to the room temperature that is further away can be predicted with high accuracy. Therefore, the thermal cutoff point Toff and the thermal cutoff point Toff can be set more appropriately, and the comfort of the indoor space 71 can be further improved.

Here, the outdoor temperature detector 42 may be installed in a place other than the outdoor unit 11. For example, the index acquisition unit 350 may acquire a signal including outside air temperature data detected by a temperature sensor provided outside the house 3 via an external electric communication line or the like. The outdoor temperature detecting unit 42 is not limited to a crisis such as a temperature sensor, and may acquire outside air temperature data obtained via an external electric communication line such as weather forecast and weather data to detect the outside air temperature.

Embodiment 3

Next, embodiment 3 will be explained. In embodiment 3, the setting unit 340 performs the process related to the report on natural ventilation based on the body temperature acquired by the surface temperature acquiring unit 320 and the outside air temperature acquired by the index acquiring unit 350. The setting unit 340 transmits a report signal to the reporting unit 58 based on the processing, and reports the report to the user. Here, ventilation is basically natural ventilation in which ventilation is performed by opening the window 4 or the like without using a ventilator.

Specifically, the setting unit 340 predicts the future amount of change in the room temperature based on the data on the main body temperature acquired by the surface temperature acquisition unit 320 and the outside air temperature acquired by the index acquisition unit 350. When it is determined that the environmental condition is suitable for ventilation based on the predicted amount of change in the room temperature, the setting unit 340 transmits a report signal for prompting ventilation to the reporting unit 58, and reports the result to the user. The setting unit 340 also determines the end of ventilation, and reports the end of ventilation to the user by transmitting a report signal to the reporting unit 58.

For example, when the setting unit 340 predicts that the heat load of the indoor space 71 decreases due to a decrease in the room temperature due to the influence of the outside air temperature in summer, it transmits a notification signal for prompting ventilation to the notification unit 58. When a change from a state of low room temperature to a state of high room temperature is predicted, it can be predicted that the room temperature will be high thereafter, and a report is made to prompt ventilation. The indoor space 71 has a small heat load and is urged to perform ventilation in a state of thermal equilibrium. This prevents energy loss to the indoor environment, saves energy, and enables air exchange. Further, it is considered that ventilation of the indoor space 71 is effective for prevention of infectious diseases.

Fig. 9 is a diagram showing a flow of processing relating to ventilation reporting in embodiment 3. Here, the processing performed by the setting unit 340, the surface temperature acquiring unit 320, and the index acquiring unit 350 is substantially performed by the control unit 101. Therefore, the following description will be made as to a case where the control unit 101 performs processing.

The control unit 101 executes the ventilation report processing shown in fig. 9. The control unit 101 performs heat load response control for predicting the amount of change in the room temperature of the indoor space 71 (step S110). Here, as described in embodiment 1, 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, the present invention is not limited thereto. As described in embodiment 1 above, the body temperature in the formula (2) changes depending on the temperature of the wall in the house 3, and the temperature of the wall is affected by the outside air temperature. Therefore, as described in embodiment 2, the control unit 101 may predict the room temperature change amount by correcting the main temperature data and the like relating to the detection by the surface temperature detection unit 43 based on the data relating to the outside air temperature relating to the detection by the outdoor temperature detection unit 42.

The control unit 101 performs heat load tendency determination for determining the tendency of the heat load in the future based on the prediction of the amount of change in the room temperature (step S120). As shown in fig. 9, in embodiment 3, the control unit 101 determines whether the trend of the heat load is an increasing trend, an intermediate trend, or a decreasing trend. If it is predicted that the amount of change in the room temperature is within the predetermined set amount of change, the control unit 101 determines that the heat load in the indoor space 71 tends to be in the middle of the increase and decrease. If it is predicted that the amount of change in the room temperature is larger than the set change range, the control unit 101 determines that the heat load is increasing and tends to increase. Then, if it is predicted that the amount of change in the room temperature is smaller than the set change range, the control unit 101 determines that the heat load is reduced and tends to decrease. Here, the control unit 101 determines the heat load trends of the 3 modes of increase, decrease, and middle, but may determine the trends of both the increase and decrease modes.

Fig. 10 is a diagram illustrating a change in the trend of the heat load in embodiment 3. First, in the case where the trend changes from the middle trend to the decreasing trend, as shown in fig. 10, for example, when the outside air temperature decreases while the sun falls from midday to evening in the summer season, the trend of the heat load by the prediction of the amount of change in the room temperature changes from the middle trend to the decreasing trend. On the other hand, in the case where the trend changes from the intermediate trend to the increasing trend, as shown in fig. 10, for example, in the case of summer, when the external air temperature increases due to the start of irradiation to the sun, the trend of the heat load by the prediction of the amount of change in the room temperature changes from the intermediate trend to the increasing trend.

When it is determined from the room temperature change amount that the change in the heat load is small, and the trend changes from the middle trend to the increasing trend or from the middle trend to the decreasing trend, the control unit 101 performs ventilation report determination of determining whether or not to transmit a report signal for prompting ventilation to the report unit 58 (step S130). For example, if a setting is made to prevent the report from being issued by setting the ventilation report on the remote controller 55, the report signal is not transmitted to the report unit 58. If the control unit 101 determines that the report signal is not to be transmitted to the report unit 58, the process returns to step S110. When it is determined that a notification signal prompting ventilation to start is transmitted, the control unit 101 transmits a notification signal to the notification unit 58 to notify that ventilation is to be prompted (step S140).

Then, the control unit 101 determines whether ventilation is finished (step S150). In embodiment 3, the control unit 101 determines whether or not the end setting time has elapsed since the transmission of the report signal for prompting ventilation to the report unit 58, for example. However, the determination regarding the end of ventilation is not particularly limited. Here, the time measuring unit 103 measures time. When it is determined that ventilation is to be terminated, the control unit 101 transmits a notification signal to prompt the completion of ventilation to the notification unit 58 (step S160).

Fig. 11 is a diagram showing an example of the report by the report unit 58. Here, the report unit 58 that performs a report regarding ventilation based on the report signal will be described. Fig. 11 shows an example in which a display device provided in the remote controller 55 displays ventilation. Here, as described above, the report by the report unit 58 is not limited to display. For example, a sound generating device such as a buzzer provided in the indoor unit 13 may be used as the notification unit 58 to perform notification based on sounding. Further, a light emitting device such as an LED lamp provided in the indoor unit 13 may be used as the notification unit 58 to perform a notification by lighting, blinking, or the like. Further, the notification unit 58 that notifies the intention of prompting ventilation to start may be different from the notification unit 58 that notifies the intention of prompting ventilation to end.

As described above, according to embodiment 3, the control unit 101 predicts the amount of change in the room temperature from the body temperature data relating to the detection by the surface temperature detection unit 43, and transmits a notification signal prompting the user to start ventilation to the notification unit 58 based on the trend of the heat load of the indoor space 71 predicted by the prediction. Therefore, ventilation can be performed at a timing when the change in the heat load of the indoor space 71 is small, and energy saving can be achieved. For example, when the air conditioner 1 performs air conditioning, energy saving can be achieved directly during operation of the air conditioner 1. Further, even when the air conditioner 1 is not in operation, an increase in heat load due to ventilation can be suppressed, and energy saving can be expected without performing operation of the air conditioner 1 or the like.

Embodiment 4

Next, embodiment 4 will be explained. The setting unit 340 of the outdoor unit control unit 51 according to embodiment 4 determines whether or not there is a person in the indoor space 71 based on the detection of the human body detection unit 49 of the indoor unit 13, and determines whether or not to transmit a report signal to the report unit 58. This is because, when there is no person in the indoor space 71, the window 4 cannot be opened or closed even if a report is made.

Fig. 12 is a diagram showing a processing flow relating to ventilation reporting according to embodiment 4. The same processing as that described in embodiment 3 is performed for the processing to which the same step numbers as those in fig. 9 are assigned. Step S110 and step S120 are the same as the processing described in embodiment 3.

In embodiment 4, when it is determined in the heat load tendency determination in step S120 that the heat load is changing from the intermediate tendency to the increasing tendency or from the intermediate tendency to the decreasing tendency, the control unit 101 determines whether or not a person is present in the indoor space 71 (step S121). Here, the control unit 101 performs determination based on the detection of the human body detection unit 49. If 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, when determining that a person is present in the indoor space 71, the control unit 101 determines whether or not to transmit a notification signal to prompt the start of ventilation to the notification unit 58 (step S130). The processing in step S130 and subsequent steps is the same as in embodiment 3.

As described above, according to embodiment 4, if it is determined that no person is present in the indoor space 71, the control unit 101 does not transmit the report signal and does not perform the report related to ventilation. Therefore, it is possible to prevent an unintended report such as a report from being made in a state where a person who opens and closes the window 4 is not present.

Embodiment 5

Next, embodiment 5 will be explained. In embodiment 5, the control unit 101 acquires the solar radiation amount data relating to the detection by the solar radiation amount detection unit 47 as an index for predicting the amount of change in the room temperature of the indoor space 71. The data is acquired by the processing of the index acquisition unit 350.

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

As shown in fig. 4 and (2) described in embodiment 1, the temperature of the main body of the house 3 changes due to the solar radiation passing through the window 4. Further, the temperature of the outer wall of the house 3 changes due to sunlight. Therefore, the main body temperature of the indoor space 71 changes according to the amount of insolation. For example, when the outer wall of the house 3 is heated by sunlight, the heat passes through the wall, thereby increasing the through-flow load and raising the temperature of the main body. When sunlight entering from the window 4 reaches the inner wall, the sunlight load increases, and the main body temperature gradually increases. On the other hand, when sunlight disappears, the main body temperature gradually decreases. Thus, the change in the temperature of the subject can be predicted by the amount of sunshine. Therefore, the control unit 101 acquires the solar radiation amount data included in the signal relating to the detection by the solar radiation amount detection unit 47, corrects the main body temperature data relating to the detection by the surface temperature detection unit 43, and uses the corrected data for the prediction of the amount of change in the room temperature. Thus, the amount of change in the room temperature of the indoor space 71 can be predicted in anticipation of a longer time than when the surface temperature of the surface temperature detector 43 is taken as the main temperature. The amount of change in room temperature is predicted by the processing of the setting unit 340.

In this way, the control unit 101 in embodiment 5 predicts the amount of change in the room temperature using the solar radiation amount data relating to the detection by the solar radiation amount detection unit 47. By using the solar radiation amount data, the amount of change in the room temperature that is more remote can be predicted with high accuracy. Therefore, the timing of making a report that urges the start of ventilation or the like can be set more appropriately. In addition, the operability of the indoor space 71 can be further improved.

In embodiment 5, the case where the solar radiation amount detection unit 47 includes an infrared sensor has been described, but the present invention is not limited thereto. For example, the solar radiation amount detection unit 47 may have an illuminance sensor and obtain solar radiation amount data from illuminance data. The solar radiation amount detection unit 47 may have a camera or the like, and obtain solar radiation amount data from visible image data of the indoor space 71 captured by the camera. Further, the solar radiation amount detection unit 47 may be configured to obtain solar radiation amount data by using a device capable of obtaining data based on the amount of power generated by the solar power generation device, weather forecast, weather, or the like.

Embodiment 6

Next, the air conditioner 1 according to embodiment 6 will be explained. In embodiment 5, the control unit 101 acquires data relating to the heat insulating performance of the main body of the house 3 or the like having the indoor space 71 as data for predicting the amount of change in the room temperature of the indoor space 71. The data is acquired by the processing of the index acquisition unit 350.

The heat insulating performance of the main body of the house 3 as a building or the like is an index indicating the ease of conduction of heat between the indoor space 71 and the outdoor space 72. The thermal insulation performance can be estimated by the average heat penetration rate of the outer skin or the heat loss coefficient, etc. The control unit 101 acquires the heat insulation performance data input by the user to the remote controller 55. The control unit 101 may acquire information indicating the heat insulating performance of the indoor space 71 by performing a learning process from the past air conditioning performance of the air conditioner 1. The acquired heat insulation performance data is stored in the storage unit 102, for example. For example, the learning process is performed by the setting unit 340 and the like.

As shown in fig. 4 and (2) described in embodiment 1, the temperature of the main body of the house 3 changes depending on the heat insulating performance. The higher the heat insulating performance is, the more difficult the room temperature during ventilation is to change, and the lower the heat insulating performance is, the more easily the room temperature during ventilation is to change. Therefore, the control unit 101 acquires the heat insulation performance data and uses the data in predicting the amount of change in the room temperature such as calculation of the main body temperature. Thus, the amount of change in the room temperature in the indoor space 71 can be predicted in anticipation of a longer time than when the surface temperature of the surface temperature detector 43 is taken as the main temperature. The amount of change in room temperature is predicted by the processing of the setting unit 340.

In this way, the setting unit 340 of the control unit 101 in embodiment 5 predicts the amount of change in room temperature using the heat insulation performance data of the house 3. By using the heat insulating property data, it is possible to predict the amount of change in room temperature over time with high accuracy. Therefore, a report urging the start of ventilation or the like can be made at a more appropriate timing.

Here, in embodiment 6, the control unit 101 may acquire data indicating the width of the indoor space 71 as an index for predicting the amount of change in the room temperature of the indoor space 71 in addition to or instead of the heat insulation performance data. The control unit 101 may acquire data relating to the width of the indoor space 71 from a signal transmitted from the remote controller 55, or may acquire data relating to the width of the indoor space 71 from an infrared sensor, an image sensor, or the like.

Embodiment 7

Next, embodiment 7 will be explained. In embodiment 7, the control unit 101 acquires the internal heat generation amount data of the indoor space 71 as data of an index used for predicting the amount of change in the room temperature of the indoor space 71. The data is acquired by the processing of the index acquisition unit 350.

As in expression (3) described in embodiment 1, the internal heat generation amount can be estimated from the number of persons in the indoor space 71, the lighting provided in the indoor space 71, the heat generation amount from the home electric appliance or the combustion appliance, and the like. Therefore, the control unit 101 predicts the process room temperature change amount using the data of the main body temperature and the internal heat generation amount.

Here, the control unit 101 may acquire the internal heat generation amount data by the setting transmitted from the remote controller 55, or may acquire the internal heat generation amount data by detecting the number of people in the room, lighting, and heat generation of the home electric appliance and the combustion appliance by the human body detection unit 49, the infrared sensor, the camera, and the like. The index acquisition unit 350 may acquire data such as the number of indoor persons and the usage status of the equipment, which are transmitted from the external equipment, as the internal heat generation amount data via an electric communication line or the like.

As described above, in embodiment 7, 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 the room temperature from the body temperature and the internal heat generation amount. By using the internal heat generation amount data, the amount of change in room temperature over a long period of time can be predicted with high accuracy. Therefore, a report urging the start of ventilation or the like can be made at a more appropriate timing. In addition, the comfort and energy saving of the indoor space 71 can be further improved.

Embodiment 8

Next, embodiment 8 will be explained. In embodiment 8, the control unit 101 acquires window opening/closing data relating to detection by the window opening/closing detection unit 45 of the indoor space 71 as an index for predicting the amount of change in the room temperature of the indoor space 71. The data is acquired by the processing of the index acquisition unit 350.

Fig. 13 is a diagram showing a processing flow relating to ventilation reporting according to embodiment 8. The same processing as that described in embodiment 3 is performed for the processing to which the same step numbers as those in fig. 9 are assigned. Step S110 and step S120 are the same as those in embodiment 3.

In embodiment 4, if it is determined in the heat load tendency determination in step S120 that the heat load is changing from the intermediate tendency to the increasing tendency or from the intermediate tendency to the decreasing tendency, the control unit 101 determines whether the heat load is increasing tendency (step S122). When determining that the thermal load is increasing, the control unit 101 determines whether or not the window 4 is open based on the window opening/closing data relating to the detection by the window opening/closing detection unit 45 (step S123). If the control unit 101 determines that the window 4 is closed, it returns to step S110.

On the other hand, when the control unit 101 determines that the window 4 is open, it determines whether or not to transmit a notification signal to prompt the start of ventilation to the notification unit 58 (step S130). The processing in step S130 and subsequent steps is the same as in embodiment 3.

In embodiment 8, the window opening/closing detection unit 45 opens and closes the window 4, but the present invention is not limited to the window 4. For example, the opening/closing state of a portion that can be opened and closed provided at a boundary portion 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 opening/closing state data of the door or the like via the remote controller 55, or may acquire the opening/closing state data by an infrared sensor or an image sensor. Further, the control unit 101 may acquire data related to opening and closing from an external device via an electric communication line or the like.

As described above, in embodiment 8, the control unit 101 adjusts the timing of the report signal relating to the ventilation report based on the body temperature and the window opening/closing data of the window opening/closing detection unit 45 in addition to the body temperature. By using the data on the opening and closing of the opening and closing portion, the amount of change in the room temperature of the indoor space 71 can be predicted more accurately, and it can be determined whether ventilation is sufficiently performed, so that the operability of the indoor space 71 can be further improved.

Here, in embodiment 8, the control unit 101 may acquire the operation state data of the ventilation equipment installed in the indoor space 71 in addition to or instead of the window opening/closing data of the window opening/closing detection unit 45 of the indoor space 71. The ventilation device is a device such as a ventilation fan or a range hood that ventilates the indoor space 71. The control unit 101 may acquire the operation state data of the ventilator via the remote controller 55, an infrared sensor or an image sensor, or via an external electrical communication line.

Here, when the ventilation equipment is operating, a large amount of air moves between the indoor space 71 and the outdoor space 72, and therefore the heat insulation performance of the indoor space 71 is reduced. As a result, the room temperature is likely to change during natural ventilation. Therefore, if the body temperature is the same, the control unit 101 sets the window detection setting time, which is the time until the ventilation is completed, to be longer when the ventilator is not operating than when the ventilator is operating. In this way, by using the operation state data of the ventilation device, it is possible to more appropriately predict the change in natural ventilation of the indoor space 71. Therefore, the comfort and energy saving performance of the indoor space 71 can be further improved.

Embodiment 9

In embodiments 1 to 8, various air-conditioning apparatuses 1 and the like have been described, but the present invention is not limited to this, and modifications and applications are possible. In the above-described embodiments, the case where the air conditioner 1 is a ventilation notifying device and the detection of various detecting units included in the air conditioner 1 is taken as data has been described, but the present invention is not limited to this. The ventilation reporting device may be a device independent of the air conditioner 1.

For example, in each of the above embodiments, the room temperature detector 41 and the surface temperature detector 43 are provided in the indoor unit 13. However, the room temperature detecting unit 41 and the surface temperature detecting unit 43 may be provided at any place as long as they can detect the temperature and the solar radiation amount as the intended temperatures, respectively. The surface temperature detecting unit 43 is not limited to the infrared sensor, and may be a temperature sensor that is installed on a wall, a floor, a ceiling, or the like of the indoor space 71 and detects the surface temperature of the wall, the floor, the ceiling, or the like.

In each of the above embodiments, the air conditioner 1 includes 1 outdoor unit 11 and 1 indoor unit 13. However, the air conditioner 1 may include 1 outdoor unit 11 and a plurality of indoor units 13. Alternatively, the air conditioner 1 may include 1 outdoor unit 11, a relay unit (not shown), a check valve (not shown), and a plurality of indoor units 13, and may be operated by mixing the indoor units 13 for cooling and the indoor units 13 for heating.

The positions where the outdoor unit 11 and the indoor units 13 are installed are not particularly limited. The outdoor unit 11 and the indoor unit 13 may be disposed at spaced positions. For example, the following may be provided: the outdoor unit 11 is installed on a roof of a building, not shown, and the indoor unit 13 is installed in a ceiling.

In each of the above embodiments, the control unit 101 of the outdoor unit control unit 51 includes the air temperature acquisition unit 310, the surface temperature acquisition unit 320, the air conditioning control unit 330, the setting unit 340, and the index acquisition unit 350, and functions as a device for controlling the air conditioning apparatus 1. However, some or all of the above-described components may be provided by the indoor unit control unit 53, or may be provided by an external device of the air conditioner 1.

Fig. 14 is a diagram showing an air conditioning system 500 according to embodiment 9. In each of the above embodiments, the case where the control device 100 that performs the processing related to the ventilation report is performed by the outdoor unit control unit 51 in the outdoor unit 11 of the air conditioner 1 has been described, but the present invention is not limited to this. For example, as shown in fig. 14, an air conditioning system 500 is provided in which the air conditioner 1 and the control device 100 are communicably connected via a communication network 400. The control device 100 may include the control unit 101, the storage unit 102, the timer unit 103, and the communication unit 104 shown in fig. 2, and perform the processing of the air temperature acquisition unit 310, the surface temperature acquisition unit 320, the air conditioning control unit 330, the setting unit 340, and the index acquisition unit 350 shown in fig. 3. For example, the communication network 400 may be a home network conforming to ECHONET Lite (registered trademark), and the control device 100 may be a controller of hems (home Energy Management system) that manages power of the house 3. The communication network 400 may be a common electric communication line. Further, 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 has the above-described functions, the control device 100 may control the air conditioning system 500 with a plurality of air conditioners 1 as control targets. In this case, the number of the air conditioners 1 is not limited. The detailed configuration is not limited as long as the air conditioner includes a refrigeration cycle, as in the air conditioners 1 and 1 to be controlled by the control device 100.

In the above-described embodiments, the case where the air-conditioning apparatus 1 is installed in the house 3 has been described, but the present invention is not limited thereto. For example, the air conditioner 1 may be installed in a collective housing, an office building, a facility, a factory, or the like. The space to be air-conditioned is not limited to the room in the house 3, and may be any space as long as air conditioning is performed by the air conditioner 1.

In the above-described embodiment, the functions of each of the air temperature acquisition unit 310, the surface temperature acquisition unit 320, the air conditioning control unit 330, the setting unit 340, and the index acquisition unit 350 are executed by the CPU included in the control unit 101 executing a program stored in the storage unit 102 or the like. 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 the respective units may be realized by independent hardware or may be realized collectively by a single hardware.

In addition, a part of the functions of each part may be implemented by dedicated hardware, and the other part may be implemented by software or firmware. In this way, the control unit 101 can realize each of the above functions by hardware, software, firmware, or a combination of these.

Further, the conventional computer such as a personal computer or an information terminal device can function as the outdoor unit control unit 51 or the control device 100 by executing a program that defines the operation of the outdoor unit control unit 51 or the control device 100.

Such a program may be distributed by any method, and may be distributed by being stored in a computer-readable recording medium such as a CD-rom (compact Disk rom), a dvd (digital Versatile Disk), an mo (magnetic Optical Disk), or a memory card, or may be distributed via a communication network such as the internet.

Description of the reference numerals

1 … air conditioning unit; 3 … house; 4 … windows; 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 part; 42 … outdoor temperature detecting part; 43 … surface temperature detecting part; 45 … window opening/closing detection part; 47 … insolation amount detection unit; 49 … human body detection part; 51 … outdoor unit control part; 53 … indoor machine control part; 55 … remote controller; 58 … report part; 59 … a wireless communication unit; 61 … refrigerant piping; a 63 … communication line; 71 … indoor space; 72 … outdoor space; 100 … control device; 101 … control unit; 102 … storage section; 103 … timing part; 104 … communication section; 109 … bus; 310 … air temperature obtaining part; 320 … surface temperature obtaining part; 330 … air conditioning control part; 340 … setting part; a 350 … index acquisition unit; 400 … communication network; 500 … air conditioning system.

Claims

1. A ventilation report device for reporting ventilation of an indoor space in a building,

the ventilation reporting device is provided with:

a surface temperature detection unit that detects a temperature of a main body surface of the indoor space as a main body temperature;

a reporting unit that reports when a report signal is transmitted; and

and a control unit that predicts a change amount of the room temperature of the indoor space based on the body temperature, determines whether or not the ambient condition is an environmental condition corresponding to natural ventilation based on a trend of a heat load of the indoor space based on the prediction, and transmits the report signal for prompting the start of the natural ventilation to the report unit based on a result of the determination.

2. The ventilation reporting device of claim 1,

an outside air temperature detecting unit for detecting an outside air temperature which is a temperature outside the building,

the control portion predicts the variation amount of the room temperature from the outside air temperature and the main body temperature.

3. The ventilation reporting device of claim 1 or 2,

comprises a solar radiation amount detection unit for detecting the amount of solar radiation incident on the building,

the control portion corrects the subject temperature based on the amount of insolation.

4. The ventilation reporting device of any of claims 1-3,

the control unit includes data relating to heat insulation performance of the building and predicts the amount of change in the room temperature.

5. The ventilation reporting device of any one of claims 1-4,

the control unit includes data of an internal heat generation amount of the indoor space to predict the change amount of the room temperature.

6. The ventilation reporting device of any one of claims 1-5,

a window opening/closing detection unit for detecting opening/closing of a window of the building,

the control unit includes data on opening and closing of the window to predict the amount of change in the room temperature.

7. The ventilation reporting device of any of claims 1-6,

a human body detection unit for detecting the presence of a human body in the indoor space,

the control unit does not transmit the report signal to the report unit if the control unit determines that the person is absent.

8. The ventilation reporting device of any one of claims 1-7,

the reporting unit has a sound generating device.

9. The ventilation reporting device of any one of claims 1-8,

the reporting section has a light emitting device.

10. The ventilation reporting device of any of claims 1-9,

the reporting unit includes a communication unit that transmits a signal to an external device.

11. The ventilation reporting device of any of claims 1-10,

the reporting unit has a display device.

12. The ventilation reporting device of any one of claims 1-11,

the control unit transmits the report signal when determining that the heat load in the room tends to increase or decrease.

13. The ventilation reporting device of any of claims 1-12,

the control unit transmits the report signal for prompting the end of the natural ventilation after a set time elapses from the transmission of the report signal for prompting the natural ventilation to the report unit.

14. The ventilation reporting device of any of claims 1-12,

includes a window opening/closing detection unit for detecting that the window is opened,

the control unit transmits the report signal for urging the end of natural ventilation after a window detection set time has elapsed since the window opening/closing detection unit detected the opening of the window.

15. The ventilation reporting device of any of claims 1-14,

the control unit determines whether or not a setting is made to not perform a report, and if it is determined that the setting is made to not perform the report, the control unit does not transmit the report signal to the reporting unit.

16. A ventilation report program for reporting on ventilation of an indoor space in a building,

the ventilation reporting program causes the computer to:

predicting a change amount of a room temperature from a main body temperature which is a temperature of a main body surface of the indoor space;

determining whether or not the indoor space is an environmental condition corresponding to natural ventilation from a trend of a heat load of the indoor space based on the prediction; and

and a step of transmitting a report signal for prompting the start of natural ventilation based on the result of the determination, and causing a report unit to report.