CN114585861B

CN114585861B - Ventilation report device and storage device for ventilation report program

Info

Publication number: CN114585861B
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: 2024-02-20
Anticipated expiration: 2040-08-31
Also published as: JPWO2022044325A1; JP7403669B2; CN114585861A; WO2022044325A1

Abstract

The ventilation reporting device is a ventilation reporting device for reporting ventilation of an indoor space (71) in a building (3), and comprises: a surface temperature detection unit (43) that detects the temperature of the surface of the body of the indoor space as the body temperature; a reporting unit (58) that reports when a report signal is transmitted; and a control unit for predicting the amount of change in the room temperature of the indoor space based on the body temperature, determining whether or not the environment condition is one corresponding to natural ventilation based on the trend of the heat load of the indoor space based on the prediction, and transmitting a report signal prompting the start of natural ventilation to the report unit based on the result of the determination.

Description

Ventilation report device and storage device for ventilation report program

Technical Field

The present technology relates to a ventilation report device and a storage device for a ventilation report program. And more particularly to reporting related to natural ventilation of indoor spaces.

Background

Conventionally, as a technique for ventilating an indoor space to be air-conditioned while air-conditioning, there is a system capable of operating in an energy-saving manner by eliminating stuffiness by a plurality of ventilation devices and an air-conditioning ventilation system for air-conditioning a part of the indoor space (for example, refer to patent document 1).

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

In the system of patent document 1, an air conditioner is connected to a ventilator to perform ventilation. The ventilation device adjusts the ventilation amount based on the temperature data acquired by the air conditioner, thereby solving the problem of stuffiness and the like in the indoor space.

Here, as a countermeasure against infectious diseases or the like, the opportunity for users in indoor spaces to open windows or the like to perform natural ventilation increases. At this time, if the window is opened, for example, when the temperature difference between the indoor and outdoor is large, such as when the air conditioner is in operation, the heat load in the indoor space increases, and the indoor environment changes. Therefore, it is important to perform natural ventilation efficiently to suppress an increase in heat load, but it is difficult for the user to grasp the timing of ventilation.

Disclosure of Invention

Accordingly, an object of the present invention is to solve the above-described problems and to obtain a ventilation report device and a storage device for a ventilation report program, which can perform a report of natural ventilation of an indoor space efficiently.

The ventilation reporting device according to the present disclosure is a ventilation reporting device that reports on 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 for predicting the amount of change in the room temperature of the indoor space based on the body temperature, determining whether or not the environment condition is one corresponding to natural ventilation based on the trend of the heat load of the indoor space based on the prediction, and transmitting a report signal prompting the start of natural ventilation to the report unit based on the result of the determination.

Further, a storage device for a ventilation report program according to the present disclosure is a storage device for a program for performing a report on ventilation of an indoor space in a building, and causes 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; a step of determining whether or not the environmental condition is one corresponding to natural ventilation based on the prediction from the trend of the heat load of the indoor space; and a step of transmitting a report signal prompting the start of natural ventilation based on the result of the determination, and causing the report unit to report.

According to the present disclosure, the control unit predicts the amount of change in room temperature from the data of the body temperature related to the detection by the surface temperature detection unit, and when it is determined that the environmental condition corresponds to the natural ventilation based on the trend of the thermal load of the indoor space by the prediction, the control unit transmits a report signal prompting the start of ventilation to the report unit to report. Therefore, a report for promoting natural ventilation can be made at a time when the change in the heat load of the indoor space is small. In addition, when air conditioning is being performed in the indoor space, energy saving can be achieved, and replacement of air in the indoor space can be performed.

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 conditioner 1 according to embodiment 1.

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

Fig. 4 is a diagram showing a situation of thermal movement in the house 3.

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

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

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

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

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

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

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

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

Fig. 13 is a diagram showing a flow of processing relating to ventilation report 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, there are cases where the size relationship of each structural member is different from the actual one. In the following drawings, the same or corresponding parts are denoted by the same reference numerals.

The configurations of the structural elements shown in the description 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 for performing the operation are processes performed in time series along the described order, but the processes are not necessarily performed in time series, and may include processes performed in parallel or independently.

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

In the embodiment, the system represents the whole of a device constituted by a plurality of devices or the whole of a function constituted by a plurality of functions.

Embodiment 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 a device that air-conditions an indoor space 71 in a house 3 to be air-conditioned. Here, the air conditioner 1 includes various units serving as ventilation reporting means. Air conditioning refers to adjusting the temperature, humidity, cleanliness, air flow, and the like of air in an air-conditioning target space, and specifically, heating, cooling, dehumidification, humidification, air cleaning, and the like.

As shown in fig. 1, an air conditioner 1 is provided in a house 3 as a building. As an example, the house 3 is a so-called general single-dwelling building. The house 3 has an indoor space 71 surrounded by a 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 "opened and closed") at the boundary portion between the inside and outside of the indoor space 71. The air conditioner 1 is, for example, a CO ₂ (carbon dioxide) or HFC (hydrofluorocarbon) and the like as a refrigerant. The air conditioner 1 is equipped with a vapor compression refrigeration cycle, and operates by obtaining electric power from a commercial power supply, a power generation device, a power storage device, or the like, not shown.

As shown in fig. 1, the air conditioner 1 includes an outdoor unit 11 provided outside the house 3, i.e., outdoors, an indoor unit 13 provided inside the house 3, i.e., indoors, and a remote control 55 operated by a user. The outdoor unit 11 and the indoor unit 13 are connected to each other 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 a device that cools the indoor space 71 in the house 3 by discharging cool air from the indoor unit 13 and heats the indoor space 71 in the house 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 controller 51. On the other hand, the indoor unit 13 includes an indoor heat exchanger 25, an indoor fan 33, and an indoor unit control unit 53. The refrigerant pipe 61 connects the compressor 21, the four-way valve 22, the outdoor heat exchanger 23, the expansion valve 24, and the indoor heat exchanger 25 of the indoor unit 13 to each other in a ring shape. Thus, a refrigeration cycle is constituted.

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

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 flow of the refrigerant in the refrigerant pipe 61 according to whether the operation of the air conditioner 1 is the cooling or dehumidifying operation or the heating operation.

The outdoor heat exchanger 23 is a 1 st heat exchanger that exchanges heat between the refrigerant flowing through the refrigerant pipe 61 and the air in the outdoor space 72 outside the space to be air-conditioned. The outdoor fan 31 is provided beside the outdoor heat exchanger 23, and is a 1 st fan for sending air in the outdoor space 72 to the outdoor heat exchanger 23. When the outdoor fan 31 starts the air 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 cold and heat energy supplied from the refrigerant flowing through the refrigerant pipe 61, and is 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 the opening degree according 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 provided beside the indoor heat exchanger 25, and is a 2 nd fan for sending air in the indoor space 71 to the indoor heat exchanger 25. When the indoor fan 33 starts the air blowing operation, a negative pressure is generated in 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 cold and heat energy supplied from the refrigerant flowing through the refrigerant pipe 61, and is discharged to the indoor space 71.

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

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

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

The indoor unit 13 includes devices related to a room temperature detecting unit 41, a surface temperature detecting unit 43, a window opening/closing detecting unit 45, a solar radiation amount detecting unit 47, a human body detecting unit 49, a reporting unit 58, and a wireless communication unit 59. The room temperature detecting unit 41 includes a temperature sensor such as 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 detecting unit 41 is provided at the suction port of the indoor heat exchanger 25, and detects the temperature of the sucked air of the indoor unit 13 as room temperature.

The surface temperature detecting unit 43 includes infrared sensors of a pyroelectric type, a thermopile type, and the like, and detects the surface temperature of the object by detecting infrared rays emitted from the object. The surface temperature detection unit 43 according to embodiment 1 is provided at a position where infrared rays emitted from a wall, a floor, or the like of the indoor space 71 can be detected, and detects the surface temperature of surrounding objects including the wall, the floor, or the like. In embodiment 1, the surface temperature of the surface temperature detection unit 43 for detection is a body temperature of a body 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 opening and closing of the window 4 is not particularly limited. The window opening/closing detection unit 45 includes, for example, an infrared sensor of a pyroelectric type, a thermopile type, or the like, and determines the area of the window 4 in the indoor space 71 from the temperature difference with the wall or the like of the house 3. When the temperature outside the indoor space 71, that is, the outside air temperature is high, the amount of change in the temperature of the area of the detection window 4 is determined to be the opening of the window 4 when the amount of change is greater than 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. When the outside air temperature is low, similarly, when 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. 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.

The window opening/closing detection unit 45 may use CO ₂ And VOC gas sensors thereof. When the air conditioner 1 is operated, the window 4 and the like are basically closed. Therefore, by the VOC gas sensor changing to be above the threshold for human entry/exit into/from the room, it is possible to detect that the window 4 has been opened.

The solar radiation amount detection unit 47 includes 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 through the window 4 or the like. Here, the case where the indoor unit 13 includes the sunlight amount detection unit 47 will be described. However, for example, by providing the sunlight amount detection unit 47 in the vicinity of the window 4 and in a place where the sunlight amount can be detected such as the outdoor space 72, the sunlight amount and the like of the wall and the like of the house 3 can be detected, and more accurate detection of the sunlight amount can be performed.

The human body detecting unit 49 has an infrared sensor of a pyroelectric type, a thermopile type, or the like, and detects whether or not a person is present in the indoor space 71.

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

The wireless communication unit 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 signals to an external device (not shown) outside the air conditioner 1, and perform various reports or the like. The external device is, for example, a smart phone, 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 sunlight amount detection unit 47, and the human body detection unit 49. For example, the air conditioner 1 includes a discharge-side pressure detection unit provided on the discharge side of the compressor 21 and detecting the pressure of the refrigerant discharged from the compressor 21. The air conditioner 1 further includes a suction side pressure detection unit provided on the suction side of the compressor 21 and detecting the pressure of the refrigerant sucked into the compressor 21. The air conditioner 1 further includes a discharge side temperature detection unit provided on the discharge side of the compressor 21 and detecting the temperature of the refrigerant discharged from the compressor 21. The air conditioner 1 further includes a suction side temperature detection unit provided on the suction side of the compressor 21 and detecting the temperature of the refrigerant sucked into the compressor 21.

Signals related 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 sunlight 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 the detection to the outdoor unit control unit 51 via the communication line 63. The indoor unit control unit 53 performs processing such as determination concerning natural ventilation or the like based on the data concerning detection. The indoor unit control unit 53 transmits a report signal based on the processing to the reporting 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, here, the air conditioner 1 not only performs air conditioning but also serves as 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 a process related to a natural ventilation report by a coordinated operation.

Fig. 2 is a diagram showing a configuration of an outdoor unit control unit 51 included in the air conditioner 1 according to embodiment 1. Fig. 2 shows a structure of a device (hardware) in the outdoor unit control section 51. The outdoor unit control unit 51 mainly controls the operation of the outdoor unit 11. Here, the outdoor unit control unit 51 functions as a control unit of the ventilation reporting 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. The respective sections are connected via a bus 109.

The control unit 101 is a device including CPU (Central Processing Unit), ROM (Read Only Memory), and RAM (Random Access Memory). The CPU is also called a central processing unit, a central arithmetic unit, a processor, a microprocessor, a microcomputer, DSP (Digital Signal Processor), or the like. In the control unit 101, 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 to control the entire outdoor unit control unit 51 in a unified manner.

The storage unit 102 is a device that functions as a so-called secondary storage device or an auxiliary storage device. The storage unit 102 is a nonvolatile semiconductor memory such as flash memory, EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM). 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 through 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 on the remote controller 55, preset data, and the like.

The timer 103 is a device for performing timing. The timer unit 103 is provided with a timer RTC (Real Time Clock), and can continue to count even during the off period of the power supply of the air conditioner 1.

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

Next, the indoor unit control unit 53 will be described. The indoor unit control unit 53 includes CPU, ROM, 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 uses the RAM as a working memory in the indoor unit control unit 53, and executes a control program stored in the ROM to control the operation of the indoor unit 13. Further, signals including data related to detection are received from various detection units included in the indoor unit 13, and transmitted 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 receives and transmits various signals via the communication line 63 to coordinate operation with the indoor unit control unit 53, thereby controlling the entire air conditioner 1. 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 operations performed by the air conditioning unit of the air conditioning apparatus 1 based on data related to 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 a 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, or the like. In this way, the outdoor unit control unit 51 and the indoor unit control unit 53 output various operation instructions to the devices of the air conditioning unit according to the operation instructions given to the air conditioning unit 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 instruction to the air conditioner 1. Examples of the operation command include a command to switch between operation and stop, a command to switch between operation modes (cooling, heating, dehumidifying, humidifying, moisturizing, air cleaning, air blowing, etc.), a command to switch between target temperatures, a command to switch between target humidity, a command to switch between air volumes, a command to switch between wind directions, and a command to switch between timers. The air conditioner 1 mainly performs an operation related to air conditioning based on the input operation command.

< refrigeration cycle in refrigeration operation >)

Here, the operation of the air conditioning unit related to air conditioning will be described. First, a description will be given of an operation mode of "cooling". When receiving an operation command of "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 to drive 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 the outdoor air taken in from the outdoor space 72, condenses and liquefies, and flows into the expansion valve 24. The refrigerant flowing into the expansion valve 24 is depressurized by the expansion valve 24 and then flows into the indoor heat exchanger 25. The refrigerant flowing into the indoor heat exchanger 25 is evaporated by heat exchange with the indoor air sucked from the indoor space 71, and then 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 heat exchange amount between the refrigerant in the indoor heat exchanger 25 and the indoor air is referred to as a cooling capacity.

< refrigeration cycle in heating operation >)

Next, the "heating" operation mode will be described. When receiving the 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 the indoor unit control unit 53 receives the operation command of "heating", it 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 the 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 depressurized by the expansion valve 24 and then flows into the outdoor heat exchanger 23. The refrigerant flowing into the outdoor heat exchanger 23 is evaporated by heat exchange with the outdoor air sucked from the outdoor space 72, and then is sucked into the compressor 21 again through the four-way valve 22. The flow of the refrigerant heats the indoor air sucked from the indoor space 71 in the indoor heat exchanger 25. The heat exchange amount between the refrigerant in the indoor heat exchanger 25 and the indoor air 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 conditioner 1 according to embodiment 1. As shown in fig. 3, the outdoor unit control unit 51 of the air conditioner 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 included in 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, for example, and are stored in the ROM or the storage unit 102 of the outdoor unit control unit 51. The control unit 101 of the outdoor unit control unit 51 executes a program stored in the ROM or the storage unit 102 by the CPU to realize the functions of the air conditioner 1.

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

Here, the room temperature detecting unit 41 periodically transmits a signal including temperature data indicating the detected room 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 signal is periodically transmitted from the room temperature detecting unit 41 side, 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 acquiring unit 310 is realized by 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, floor, ceiling, and column surrounding 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 detection unit 43 periodically transmits a signal including data of the detected surface temperature, that is, 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 signal is periodically transmitted from the surface temperature acquisition unit 320 side, 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 cooperation of the control unit 101 and the communication unit 104. The surface temperature acquisition unit 320 functions as a surface temperature acquisition means.

The air conditioning control unit 330 controls the equipment of the air conditioning unit, and controls the air conditioning of the indoor space 71. The air conditioning control unit 330 communicates with the indoor unit control unit 53 via the communication unit 104, and cooperates with the indoor unit control unit 53 to air-condition the air conditioning unit. 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 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 unit.

When it is determined that the room temperature reaches the thermal off point Toff based on the room temperature data acquired by the air temperature acquisition unit 310, the air conditioning control unit 330 stops the driving of the compressor 21. When the air conditioning control unit 330 determines that the room temperature reaches the thermal on point Ton based on the room temperature data acquired by the air temperature acquisition unit 310, it starts driving the compressor 21. The thermal off point Toff is a temperature at which the compressor 21 should stop driving, which is set to prevent the air conditioning from being excessively performed. The thermal on point Ton is the temperature at which the compressor 21, which 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 off-point Toff and the thermal on-point Ton are referred to as "thermal off-point Toff" and "thermal on-point Ton", respectively.

The room temperature reaching the thermal off point Toff means that the room temperature rises from a temperature lower than the thermal off point Toff to a temperature higher than the thermal off point Toff or that the room temperature falls from a temperature higher than the thermal off point Toff to a temperature lower than the thermal off point Toff. Similarly, the room temperature reaching the thermal on point Ton means that the room temperature increases from a temperature lower than the thermal on point Ton to a temperature higher than the thermal on point Ton or the room temperature decreases 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 the driving of the compressor 21 when it determines that the room temperature reaches the thermal off point Toff based on the room temperature data acquired by the air temperature acquisition unit 310 and when the prohibition time elapses from the stop of the driving of the compressor 21.

Here, the prohibition time is a time required from when the compressor 21 stops driving to when the driving is restarted, 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. If the compressor 21 is to be driven in such a state, a failure is caused. Therefore, the compressor 21 is set with a prohibition time for prohibiting the start of operation immediately after the stop of the driving. The prohibition time is set to, for example, a time from tens of seconds to several minutes. Since such a prohibition time is defined, even if the room temperature reaches the thermal on point Ton, the air conditioning control unit 330 does not start driving the compressor 21 until the prohibition time elapses from the stop of driving the compressor 21. Therefore, depending on the surrounding environment, the room temperature may change during a period from when the drive of the compressor 21 is stopped to when the operation can be restarted, and the comfort of the indoor space 71 may be reduced.

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

The index obtaining unit 350 obtains data related to the detection by the 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 detecting unit 42, the window opening/closing detecting unit 45, the sunlight amount detecting unit 47, and the human body detecting unit 49 are acquired.

Parameter calculated at room temperature

The change in room temperature after the compressor 21 stops driving depends on the surrounding environment. Here, an important factor affecting room temperature will be described.

Fig. 4 is a diagram showing a situation of thermal movement in the house 3. As shown in fig. 4, heat is transferred between the indoor space 71 and the outdoor space 72 via the wall, window 4, slit, ventilation device, and the like of the house 3. As a result of such thermal movement, the room temperature of the indoor space 71 varies according to various factors. In summary, the room temperature of the indoor space 71 is set 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 floor of the indoor space 71, and the time, as in expression (1).

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

The body temperature of the indoor space 71 is the surface temperature of the body such as the wall, floor, ceiling, and column 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 a function of the temperature of the outer wall of the house 3, the sunlight passing through the window 4 of the indoor space 71, the heat insulating performance of the indoor space 71, and the time, as in expression (2).

Body temperature = function (temperature of outer wall, solar radiation through window 4, thermal insulation, 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 sunlight and outside air via the outer wall of the house 3. In addition, the main body of the indoor space 71 is directly heated by sunlight passing through the window 4. Insolation through window 4 is a function of the performance of window 4 and the area of 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 heat acquisition coefficient or an ηa value as an average solar heat acquisition rate of the outer skin can be used. The heat insulating performance of the indoor space 71 can be estimated from the heat penetration rate indicating the ease of heat conduction. As the heat penetration rate, a UA value as the average heat penetration rate of the skin or a Q value as the heat loss coefficient can be used.

The amount of heat generated in the indoor space 71 is heat generated by a person, a lighting, a heater, or the like existing in the indoor space 71. The internal heat generation amount is set 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 illumination, home appliances, and burners provided in the indoor space 71, as in expression (3).

Internal heating value = function (number of people in room, lighting, home appliances, combustion appliances) … (3)

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, door, slit, ventilator, and the like of the house 3. The air inflow heat is set as a function of the volume of the outdoor space 72, the outside air temperature, the room temperature of the room adjacent to the indoor space 71, and the equivalent area of the slit indicating the air tightness of the indoor space 71, as in expression (4). Here, the gap equivalent area is also referred to as C value.

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

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

As shown in fig. 5, when the body temperature is relatively low, the room temperature is greatly reduced after the compressor 21 is stopped to be driven by rising to the thermal 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 it is assumed that the driving of the compressor 21 is stopped at the same thermal off point Toff, when the main body temperature is relatively low, the possibility that the room temperature changes beyond the thermal on point Ton during the time when the prohibition time0 is elapsed becomes higher than when the main body temperature is relatively high. When the room temperature changes beyond the thermal on point Ton, the temperature becomes too cold during heating and becomes too hot during cooling. Accordingly, the comfort of the indoor space 71 is lowered.

In this way, in order to suppress the room temperature from changing beyond the thermal on point Ton during the prohibition time0, the setting unit 340 shown in fig. 3 sets a different thermal off point Toff according to the body temperature. Specifically, the setting unit 340 sets the thermal break 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 unit 340 sets the thermal break point Toff to a temperature higher 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 room temperature until the prohibition time required for restarting the driving of the compressor 21 elapses from the stop of the driving of the compressor 21, based on the body temperature acquired by the surface temperature acquisition unit 320. In general, the larger the difference between the room temperature and the body temperature, the larger the amount of room temperature change in the prohibition time. For example, the lower the main body temperature is during the heating operation, the larger the amount of change in the room temperature is, and the higher the main body temperature is during the cooling operation, the larger the amount of change in the room temperature is.

The setting unit 340 predicts 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 using the above equation (1). As in the above equation (1), the room temperature is determined by a plurality of parameters including the body temperature and time. Here, the parameters of the heat generation, the air inflow heat, and the areas of the wall and the floor included in the above formula (1) may be predetermined values, or values related to detection by the sensor may be used.

The setting unit 340 predicts the amount of change in the room temperature during the prohibition time, and sets the thermal break point Toff based on the predicted amount of change. Specifically, the setting unit 340 sets the thermal off point Toff to a temperature obtained by adding or subtracting the predicted change amount to or from the thermal on point Ton, which is the set temperature. During the heating operation, the setting unit 340 sets the thermal off point Toff to a temperature obtained by adding the predicted amount of change in the room temperature to the thermal on point Ton. Thereby, the room temperature is reduced to the thermal on point Ton at the time when the prohibition time after the thermal disconnection ends. In contrast, during the cooling operation, the setting unit 340 sets the thermal off point Toff to a temperature obtained by subtracting the predicted amount of change in the room temperature from the thermal on 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 a relationship between the main body 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 driving of the compressor 21 according to the thermal off point Toff set by the setting unit 340. In fig. 6 and 7, the broken line indicates a change in room temperature in the case where the body temperature in the indoor space 71 is relatively low, specifically, in the case where the body temperature is the 1 st temperature. In contrast, the solid line indicates a change in room temperature when the body temperature in the indoor space 71 is relatively high, specifically, when the body temperature is the 2 nd temperature higher than the 1 st temperature.

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

After thermal break, the lower the body temperature, the more the room temperature decreases. At this time, the thermal off point Toff1 and the thermal off point Toff2 are set by predicting the amount of change in the room temperature within the prohibition time 0. Therefore, the room temperature is reduced to the thermal on point Ton, which is the set temperature, at the time when the prohibition time0 ends. When the room temperature is reduced to the thermal on point Ton, the air conditioning control unit 330 starts driving the compressor 21 to perform thermal on. Thereby, the room temperature starts to rise again. In this way, the room temperature is maintained at a temperature equal to or higher than the set temperature regardless of the level of the main body temperature.

In contrast, during the cooling operation, as shown in fig. 7, the setting unit 340 sets the thermal off point Toff1 and the thermal off point Toff2 to a temperature lower than the thermal on point Ton. The setting unit 340 sets the thermal break point Toff1 in the case where the body temperature is relatively low to a temperature higher than the thermal break point Toff2 in the case where the body temperature is relatively high. When the room temperature is reduced to the thermal off point Toff1 in the case where the body temperature is relatively low, the air conditioning control unit 330 stops driving the compressor 21 to perform thermal off. When the room temperature is reduced to the thermal off point Toff2 lower than the thermal off point Toff1 in the case where the main body temperature is relatively high, the air conditioning control unit 330 stops driving of the compressor 21 to perform thermal off.

After thermal break, the body temperature increases more greatly as the room temperature increases. At this time, the thermal off point Toff1 and the thermal off point Toff2 are set by predicting the amount of change in the room temperature within the prohibition time 0. Therefore, the room temperature rises to the thermal on point Ton, which is the set temperature, at the time when the prohibition time ends. When the room temperature rises to the thermal on point Ton, the air conditioning control unit 330 starts driving the compressor 21 to perform thermal on. Thereby, the room temperature starts to decrease again. In this way, the room temperature is maintained at a temperature equal to or lower than the set temperature regardless of the level of the main body temperature.

Fig. 8 is a diagram showing a flow of air conditioning control processing performed by the air conditioner 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 within 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 so as not to restart the compressor 21 immediately after the thermal shutdown in order to protect the compressor 21. When the driving of the compressor 21 is stopped, the control unit 101 predicts how much the internal temperature changes during the prohibition time. Specifically, the control unit 101 predicts that the amount of change in room temperature increases as the body temperature decreases during the heating operation of the air conditioner 1, and predicts that the amount of change in room temperature increases as the body temperature increases during the cooling operation.

If the room temperature change amount within the prohibition time is predicted, the control unit 101 adjusts the thermal off point Toff based on the predicted room temperature change amount (step S2). Specifically, the control unit 101 sets the thermal off point Toff to a temperature obtained by adding the predicted amount of change in room temperature to the thermal on point Ton during the heating operation. The control unit 101 sets the thermal off point Toff to a temperature obtained by subtracting the predicted amount of change in room temperature from the thermal on point Ton during the cooling operation. In step S1 and step S2, the control unit 101 functions as the setting unit 340.

When the thermal off point Toff is adjusted, the control unit 101 refers to the room temperature detected by the room temperature detecting unit 41, and determines whether or not the room temperature reaches the thermal off point Toff (step S3). Specifically, when the room temperature rises to a temperature equal to or higher than the thermal off point Toff during heating, the control unit 101 determines that the room temperature reaches the thermal off point Toff. In contrast, when the room temperature is reduced to the temperature equal to or lower than the thermal off point Toff during cooling, the control unit 101 determines that the room temperature has reached the thermal off point Toff.

When it is determined that the room temperature has not reached the thermal off point Toff (no in step S3), the control unit 101 remains in step S3 until the room temperature reaches the thermal off point Toff.

On the other hand, when it is determined that the room temperature has reached the thermal break point Toff (yes in step S3), the control unit 101 performs thermal break 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 conditioner 1 stops air conditioning of the indoor space 71.

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

When the room temperature does not reach the thermal on point Ton (no in step S5), the control unit 101 remains in step S5 until the room temperature reaches the thermal on point Ton.

On the other hand, when the room temperature reaches the thermal on point Ton (yes in step S5), the control unit 101 further determines whether or not the prohibition time elapses from the time when the air conditioning unit is thermally turned off (step S6). Specifically, the control unit 101 determines whether or not the elapsed time from the thermal disconnection by the air conditioning unit exceeds a predetermined prohibition time based on the timer of the timer unit 103.

When it is determined that the prohibition time has not elapsed since the air conditioning unit was turned off (step S6: no), the control unit 101 remains in step S6 until the prohibition time has elapsed since the air conditioning unit was turned off. 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 be thermally turned on if the prohibition time does not elapse since the air conditioning unit is thermally turned off.

On the other hand, when it is determined that the prohibition time has elapsed since the air conditioning unit was turned off (yes in step S6), the control unit 101 turns on the air conditioning unit (step S7). Specifically, the control unit 101 controls the compressor 21 to change the rotational 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 step S3 to step S7, the control unit 101 functions as the air conditioning control unit 330.

When the air conditioning unit is thermally disconnected, the control unit 101 returns the process to step S1, and repeats the processes of steps S1 to S7. In other words, the control unit 101 repeatedly performs the following processing: the thermal off point Toff is changed according to the body temperature, and if the room temperature reaches the thermal off point Toff, the air conditioning unit is turned off, and if the room temperature reaches the thermal on point Ton, the air conditioning unit is turned on.

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

By adjusting the thermal off point Toff in accordance with the body temperature in this way, it is possible to suppress the room temperature from changing beyond the thermal on point Ton, which is the set temperature, during the prohibition time in which the compressor 21 cannot be restarted just after the thermal off. Accordingly, the comfort in the indoor space 71 can be improved. In addition, when it is predicted that the amount of change in the room temperature is small, the control unit 101 can stop the driving of the compressor 21 in advance. Therefore, the air conditioner 1 according to embodiment 1 can reduce the power consumption for air conditioning.

Embodiment 2

Next, an air conditioner 1 according to embodiment 2 will be described. The air conditioner 1 according to embodiment 1 predicts the amount of change in room temperature based on the body temperature, and adjusts the thermal break point Toff. In contrast, the air conditioner 1 according to embodiment 2 performs processing as an index for predicting the amount of change in the room temperature by the outdoor unit control unit 51, and further includes data of the outside air temperature obtained by the outdoor temperature detection unit 42.

As shown in the expressions (2) and (4) described in embodiment 1, the body temperature of the indoor space 71 changes by heating from the temperature of the outer wall of the house 3. The temperature of the outer wall of the house 3 is changed by heat from the outside air temperature. Accordingly, the main body temperature of the indoor space 71 varies according to the outside air temperature. For example, if the outside air temperature increases, the body temperature increases with a delay of several hours, and if the outside air temperature decreases, the body temperature gradually decreases. In this way, the change in the body temperature can be predicted by the outside air temperature. Therefore, by obtaining the outside air temperature, it is possible to predict the amount of change in the room temperature of the indoor space 71 for a longer period of time than when only the main body temperature is used.

The setting unit 340 according to embodiment 2 sets the thermal break point Toff based on the data of the main body temperature acquired by the surface temperature acquisition unit 320 and the outside air temperature acquired by the index acquisition unit 350. Specifically, the setting unit 340 sets the thermal break 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 break point Toff so that the outside air temperature is relatively lower than the outside air temperature is relatively higher. The air conditioning control unit 330 thus stops the driving of the compressor 21 at the thermal off point Toff set by the setting unit 340 according to the main body temperature and the outside air temperature.

In contrast, during the cooling operation, the setting unit 340 sets the thermal off point Toff1 and the thermal off point Toff2 to a temperature lower than the thermal on point Ton. The setting unit 340 sets the thermal off point Toff1 in the case where the outside air temperature is relatively low to a temperature higher than the thermal off point Toff2 in the case where the outside air temperature is relatively high. In this way, the thermal off point Toff1 and the thermal off point Toff2 are set according to the outside air temperature, whereby the compressor 21 is stopped in advance in the case where it is predicted that the room temperature is lowered due to the low outside air temperature. This suppresses supercooling of the indoor space 71, improves comfort, and reduces power consumption. In addition, when it is predicted that the room temperature rises due to the high outside air temperature, the compressor 21 is operated for a long period of time. Therefore, the air conditioner 1 can sufficiently cool.

As described above, the air conditioner 1 according to embodiment 2 adjusts the thermal break point Toff and the thermal break point Toff based on the body temperature and the outside air temperature based on the outside air temperature. By setting the thermal break point using the outside air temperature, it is possible to predict a change to a room temperature that is far more accurate. Accordingly, the thermal off point Toff and the thermal off point Toff can be set more appropriately, and the comfort of the indoor space 71 can be further improved.

Here, the outdoor temperature detection unit 42 may be provided at a location other than the outdoor unit 11. For example, the index obtaining unit 350 may obtain 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 detection unit 42 is not limited to a device such as a temperature sensor, and may acquire outside air temperature data obtained via an external electrical communication line such as weather forecast and weather data, and detect an outside air temperature.

Embodiment 3

Next, embodiment 3 will be described. In embodiment 3, the setting unit 340 performs processing related to a report on natural ventilation based 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. 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 basically means natural ventilation in which ventilation is performed by opening the window 4 or the like without using a ventilation device.

Specifically, the setting unit 340 predicts the amount of change in room temperature in the future 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 the setting unit 340 determines that the environmental condition suitable for ventilation is satisfied based on the predicted amount of change in room temperature, it sends a report signal prompting ventilation to the reporting unit 58, and reports the report to the user. The setting unit 340 also determines the end of ventilation, and sends a report signal prompting the end of ventilation to the reporting unit 58, thereby reporting the end of ventilation to the user.

For example, if the setting unit 340 predicts that the room temperature decreases due to the influence of the outside air temperature in summer and the heat load of the indoor space 71 decreases, it sends a report signal for prompting ventilation to the reporting unit 58. If a change from a low room temperature state to a high room temperature state is predicted, a report is made to promote ventilation because a subsequent increase in room temperature can be predicted. The heat load of the indoor space 71 is small, and ventilation is promoted in a state of thermal equilibrium. This can prevent energy loss to the indoor environment, save energy, and allow air replacement. Further, it is considered that ventilation of the indoor space 71 is effective in preventing infectious diseases.

Fig. 9 is a diagram showing a flow of processing related to ventilation report in embodiment 3. Here, the processing performed by the setting unit 340, the surface temperature obtaining unit 320, and the index obtaining unit 350 is substantially performed by the control unit 101. Therefore, the case where the control unit 101 performs the processing will be described here.

The control unit 101 executes ventilation report processing shown in fig. 9. The control unit 101 performs thermal 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 room temperature based on the body temperature involved in the detection by the surface temperature detection unit 43. However, the present invention is not limited thereto. As described in embodiment 1 above, the main body temperature in expression (2) varies according to 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 amount of change in room temperature by correcting the main body temperature data or the like relating to the detection by the surface temperature detection unit 43 based on the data of the outside air temperature relating to the detection by the outdoor temperature detection unit 42.

The control unit 101 performs a thermal load trend determination for determining a trend of thermal load in the future based on the prediction of the room temperature change amount (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 the control unit 101 predicts that the room temperature change amount is within the predetermined set change amount range, it determines that the heat load of the indoor space 71 is in the intermediate trend of not increasing or decreasing. If the control unit 101 predicts that the room temperature change amount is larger than the set change range, it determines that the heat load is increasing and the trend is increasing. If the control unit 101 predicts that the room temperature change amount is smaller than the set change range, it determines that the thermal load is decreasing and the trend is decreasing. Here, the control unit 101 determines the trend of the heat load in the 3 modes of increasing, decreasing, and intermediate, but may determine the trend of increasing and decreasing in both modes.

Fig. 10 is a diagram illustrating a change in the trend of the thermal load in embodiment 3. First, as shown in fig. 10, for example, in the case where the trend is changed from the middle trend to the decreasing trend, when the outside air temperature is lowered by the sun falling from midday to evening in summer, the trend of the thermal load by the prediction of the room temperature change amount is changed from the middle trend to the decreasing trend. On the other hand, in the case of a change from the intermediate trend to the increasing trend, as shown in fig. 10, for example, in the case of assuming summer, when irradiation is started toward the sun and the outside air temperature is raised, the trend of the heat load by the prediction of the room temperature change amount changes from the intermediate trend to the increasing trend.

When the control unit 101 determines that the change in the heat load is small, the change from the intermediate trend to the increasing trend, or the change from the intermediate trend to the decreasing trend, based on the room temperature change amount, it determines whether or not to send a notification signal prompting ventilation to the notification unit 58 (step S130). For example, if a setting is made in relation to the ventilation report by the remote controller 55 so as not to report, a report signal is not sent to the reporting unit 58. When determining that the report signal is not transmitted to the report unit 58, the control unit 101 returns to step S110. When the control unit 101 determines that the report signal prompting the start of ventilation is transmitted, the report signal is transmitted to the report unit 58, and the report prompting the start of ventilation is reported (step S140).

Then, the control unit 101 determines whether ventilation is completed (step S150). In embodiment 3, the control unit 101 determines whether or not an 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 of the ventilation completion is not particularly limited. Here, the timer 103 measures time. When the control unit 101 determines that ventilation is completed, it transmits a report signal prompting the completion of ventilation to the report unit 58 (step S160).

Fig. 11 is a diagram showing an example of the report by the reporting unit 58. Here, the report unit 58 that reports ventilation based on the report signal will be described. Fig. 11 shows an example in which ventilation is performed on a display device included in the remote controller 55. Here, the report by the reporting unit 58 is not limited to the display as described above. For example, a sound generating device such as a buzzer provided in the indoor unit 13 may be used as the reporting unit 58 to report a sound. The light emitting device such as the LED lamp included in the indoor unit 13 may be used as the reporting unit 58 to report the lighting, blinking, or the like. The report unit 58 for reporting the start of the induced ventilation may be different from the report unit 58 for reporting the end of the induced ventilation.

As described above, according to embodiment 3, the control unit 101 predicts the amount of change in room temperature from the main body temperature data relating to the detection by the surface temperature detection unit 43, and transmits a report signal prompting the user to start ventilation to the report unit 58 based on the trend of the heat load of the indoor space 71 based on 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 described. The setting unit 340 of the outdoor unit control unit 51 according to embodiment 4 determines whether or not a person is present 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 send a report signal to the reporting unit 58. This is because, when no person is present 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 flow of processing relating to ventilation report according to embodiment 4. The same processing as that described in embodiment 3 is performed for the processing with the same step numbers as those in fig. 9. 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 trend determination in step S120 that the heat load changes from the intermediate trend to the increasing trend or from the intermediate trend to the decreasing trend, the control unit 101 determines whether or not a person is present in the indoor space 71 (step S121). Here, the control unit 101 makes a determination based on the detection by the human body detection unit 49. When the control unit 101 determines that no person is present in the indoor space 71, it returns to step S110.

On the other hand, when the control unit 101 determines that a person is present in the indoor space 71, it determines whether or not to transmit a report signal prompting the start of ventilation to the report unit 58 (step S130). The processing after step S130 is the same as in embodiment 3.

As described above, according to embodiment 4, when the control unit 101 determines that no person is present in the indoor space 71, it does not transmit a report signal and does not report on ventilation. Therefore, meaningless reporting such as reporting in a state where the person opening and closing the window 4 is not present can be prevented.

Embodiment 5

Next, embodiment 5 will be described. In embodiment 5, the control unit 101 acquires solar radiation amount data related 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 solar radiation is the amount of radiant energy received from the sun. As described above, the solar radiation amount detection unit 47 is provided in the indoor unit 13, the vicinity of the window 4 in the indoor space 71, the outdoor space 72, or other places where the solar radiation amount can be detected, and the like, to detect the solar radiation amount. The control unit 101 acquires solar radiation amount data included in a signal related to the detection by the solar radiation amount detection unit 47 via the communication unit 104.

As shown in the expressions (2) and (4) described in embodiment 1, the body temperature of the house 3 changes from sunlight passing through the window 4. In addition, the temperature of the outer wall of the house 3 changes from sunlight. Accordingly, the main body temperature of the indoor space 71 varies according to the amount of sunlight. For example, when the outer wall of the house 3 is heated by sunlight, heat passes through the wall, and thus the flow load increases, and the body temperature increases. 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, if the sunlight is lost, the body temperature gradually decreases. In this way, the change in the body temperature can be predicted by the amount of sunlight. Therefore, the control unit 101 acquires the sunlight amount data included in the signal related to the detection by the sunlight amount detection unit 47, corrects the main body temperature data related to the detection by the surface temperature detection unit 43, and the like, and uses the corrected data for the prediction of the room temperature change amount. Thus, the amount of change in the room temperature of the indoor space 71 can be predicted for a longer period of time than when the surface temperature of the surface temperature detecting unit 43 is set as the main body temperature. The prediction of the room temperature change amount is performed by the processing of the setting unit 340.

As described above, the control unit 101 in embodiment 5 predicts the amount of change in the room temperature using the sunlight amount data related to the detection by the sunlight amount detection unit 47. By using the solar radiation amount data, a further room temperature change amount can be predicted with high accuracy. Therefore, the time for reporting the start of the induced ventilation or the like can be set more appropriately. Further, the operability of the indoor space 71 can be further improved.

Here, in embodiment 5, the case where the solar radiation amount detection unit 47 has an infrared sensor has been described, but the present invention is not limited to this. For example, the sunlight amount detection unit 47 may have an illuminance sensor, and may obtain sunlight amount data from illuminance data. The sunlight amount detection unit 47 may have a camera or the like, and may obtain sunlight amount data from visible image data of the indoor space 71 captured by the camera. Further, the solar radiation amount data may be obtained by using, as the solar radiation amount detection unit 47, a device or the like that can obtain data such as the power generation amount, weather forecast, weather, or the like based on the solar power generation device.

Embodiment 6

Next, an air conditioner 1 according to embodiment 6 will be described. In embodiment 5, the control unit 101 acquires data on the heat insulating performance of the main body of the house 3 or the like having the indoor space 71 as data for predicting an index of 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 of the building is an index indicating the ease of heat transfer between the indoor space 71 and the outdoor space 72. The heat insulating performance can be estimated by the sheath average heat penetration rate or heat loss coefficient, etc. The control unit 101 acquires heat insulation performance data input by a 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 learning processing from the past air conditioning performance of the air conditioner 1. The acquired heat insulating performance data is stored in the storage unit 102, for example. For example, the setting unit 340 performs learning processing.

As shown in the formulas (4) and (2) described in embodiment 1, the body temperature of the house 3 varies depending on the heat insulating performance. The higher the heat insulating performance, the more difficult the change of the room temperature during ventilation, the lower the heat insulating performance, and the more easily the change of the room temperature during ventilation. Therefore, the control unit 101 acquires heat insulating performance data and uses the data in prediction of the amount of change in room temperature, such as calculation of the body temperature. Thus, the amount of change in the room temperature in the indoor space 71 can be predicted for a longer period of time than when the surface temperature of the surface temperature detecting unit 43 is set as the main body temperature. The prediction of the room temperature change amount is performed 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 performance data, a further amount of change in room temperature can be predicted with high accuracy. Therefore, the report of the start of the induced 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 insulating 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 by an infrared sensor, an image sensor, or the like.

Embodiment 7

Next, embodiment 7 will be described. In embodiment 7, the control unit 101 acquires the internal heat generation amount data of the indoor space 71 as described above as data of an index used when 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 the equation (3) described in embodiment 1, the internal heat generation amount can be estimated from the number of indoor people in the indoor space 71, the illumination provided in the indoor space 71, the heat generation amount from the home electric appliance and the combustion appliance, and the like. Therefore, the control section 101 predicts the process room temperature variation 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 setting transmitted from the remote controller 55, or may acquire the internal heat generation amount data by detecting the heat generation of the indoor people, lighting, home appliances, and combustion equipment by the human body detection unit 49, an infrared sensor, a camera, and the like. The index obtaining unit 350 may obtain data such as the number of persons in the room and the use status of the device, which are transmitted from the external device, as the internal heat generation amount data via an electric communication line or the like.

In this way, in embodiment 7, the control unit 101 obtains the internal heat generation amount as data on the basis of the body temperature, and predicts the room temperature change amount based on the body temperature and the internal heat generation amount. By using the internal heat generation amount data, a further room temperature change amount can be predicted with high accuracy. Therefore, the report of the start of the induced ventilation or the like can be made at a more appropriate timing. Further, the comfort and energy saving of the indoor space 71 can be further improved.

Embodiment 8

Next, embodiment 8 will be described. In embodiment 8, the control unit 101 acquires window opening/closing data related 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 flow of processing relating to ventilation report according to embodiment 8. The same processing as that described in embodiment 3 is performed for the processing with the same step numbers as those in fig. 9. Step S110 and step S120 are the same as in embodiment 3.

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

On the other hand, when the control unit 101 determines that the window 4 is opened, it determines whether or not to transmit a report signal prompting the start of ventilation to the report unit 58 (step S130). The processing after step S130 is the same as in embodiment 3.

Here, in embodiment 8, the window opening/closing detection unit 45 is based on the opening/closing of the window 4, but is not limited to the window 4. For example, the open/close state of an openable/closable portion provided in a boundary portion between the indoor space 71 and the outdoor space 72, such as a door or a partition wall, 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 via an infrared sensor or an image sensor. The control unit 101 may acquire data on opening and closing from an external device via an electrical communication line or the like.

As described above, in embodiment 8, the control unit 101 adjusts the timing of the report signal related 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/closing of the opening/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 ventilator provided 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 ventilator or a range hood that ventilates the indoor space 71. The operation state data of the ventilator may be acquired by the remote controller 55, by an infrared sensor or an image sensor, or by an external electric communication line or the like.

Here, when the ventilator is operating, a large amount of air moves between the indoor space 71 and the outdoor space 72, and thus the heat insulating performance of the indoor space 71 is reduced. As a result, the room temperature is easily changed during natural ventilation. Therefore, if the main body temperature is the same, the control unit 101 sets the window detection setting time, which is the time until the ventilation is completed, longer when the ventilator is not operating than when the ventilator is operating. By using the operation state data of the ventilator in this way, the change in natural ventilation of the indoor space 71 can be predicted more appropriately. Accordingly, the comfort and energy saving of the indoor space 71 can be further improved.

Embodiment 9

While various air conditioning apparatuses 1 and the like have been described in embodiments 1 to 8, the present invention is not limited to this, and modifications and applications can be made. In the above embodiments, the air conditioner 1 is the ventilation report device and the detection of various detection units included in the air conditioner 1 is described as data, but the present invention is not limited thereto. The ventilation reporting device may be a device independent of the air conditioning device 1.

In the above embodiments, for example, the room temperature detecting unit 41 and the surface temperature detecting unit 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 target temperature and the amount of sunlight, respectively. The surface temperature detection unit 43 is not limited to an infrared sensor, and may be a temperature sensor provided on a wall, floor, ceiling, or the like of the indoor space 71 and detecting the surface temperature of the same.

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 be provided with 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 cooled indoor units 13 and the heated indoor units 13.

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

In 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, a part or all of the above-described portions 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 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 thereto. For example, as shown in fig. 14, an air conditioning system 500 is provided, which connects the air conditioning apparatus 1 and the control apparatus 100 to each other via a communication network 400. The control device 100 may further 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 in compliance with the registered trademark (ecant Lite), or the control device 100 may be a controller HEMS (Home Energy Management System) for managing the electric power of the house 3. In addition, the communication network 400 may be a public electrical communication line. The control device 100 may be a server or the like that controls the air conditioner 1 from outside the house 3.

In the case where the control device 100 has the functions described above, the control device 100 may control the air conditioning system 500 by using a plurality of air conditioning apparatuses 1 as control targets. In this case, the number of air conditioners 1 is not limited. The air conditioning apparatuses 1 and 1 to be controlled by the control apparatus 100 are not limited to the detailed configuration as long as they are provided with a refrigeration cycle.

In the above embodiments, the case where the air conditioner 1 is provided 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 residential building, an office building, a facility, a factory, or the like. The air-conditioning target space is not limited to the room in the house 3, and may be any space as long as it is a space that is air-conditioned 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 of the control unit 101 executing the program stored in the storage unit 102 or the like. However, the control unit 101 may be dedicated hardware. Dedicated hardware refers to, for example, a single circuit, a complex circuit, a programmed processor, ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array), or a combination of these. In the case where the control unit 101 is dedicated hardware, the functions of the respective units may be realized by separate hardware, or the functions of the respective units may be realized collectively by a single hardware.

In addition, one part of the functions of each section 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 the functions described above by hardware, software, firmware, or a combination of these.

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

The distribution method of such a program is arbitrary, and may be distributed by being stored in a computer-readable recording medium such as a CD-ROM (Compact Disk ROM), DVD (Digital Versatile Disk), MO (Magneto 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 plant; 3 … house; 4 … window; 11 … outdoor unit; 13 … indoor units; 21 … compressor; 22 … four-way valve; 23 … outdoor heat exchanger; 24 … expansion valve; 25 … indoor heat exchanger; 31 … outdoor fan; 33 … indoor blower; 41 … room temperature detecting section; 42 … outdoor temperature detecting section; 43 … surface temperature detecting section; 45 … window opening/closing detecting unit; 47 … sunlight amount detecting unit; 49 … human body detecting part; 51 … outdoor unit control unit; 53 … indoor unit control unit; 55 … remote control; 58 … report section; 59 … wireless communication unit; 61 … refrigerant piping; 63 … communication lines; 71 … indoor space; 72 … outdoor space; 100 … control means; 101 … control unit; 102 … store; 103 … timing part; 104 … communication unit; 109 … bus; 310 … air temperature obtaining unit; 320 … surface temperature obtaining unit; 330 … air conditioning control unit; 340 … setting part; 350 … index obtaining unit; 400 … communication network; 500 … air conditioning system.

Claims

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

the ventilation report 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

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 environment condition is an environment condition corresponding to natural ventilation based on a trend of the heat load of the indoor space based on the prediction, and transmits the report signal prompting the start of natural ventilation to the report unit based on a result of the determination,

the control unit determines that the heat load of the indoor space is in an intermediate trend of not increasing and not decreasing if the amount of change of the room temperature is predicted to be within a predetermined set change amount range, determines that the heat load of the indoor space is in an increasing trend if the amount of change of the room temperature is predicted to be greater than the set change amount range, determines that the heat load of the indoor space is in a decreasing trend if the amount of change of the room temperature is predicted to be less than the set change amount range,

The control unit transmits the report signal prompting the start of the natural ventilation to the report unit when it is determined that the intermediate trend is in the increasing trend or the decreasing trend.

2. The ventilation reporting device of claim 1, wherein,

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

the control section predicts the amount of change in the room temperature from the outside air temperature and the main body temperature.

3. The ventilation reporting device as claimed in claim 1 or 2, wherein,

comprises a sunlight amount detection part for detecting the sunlight amount incident to the building,

the control unit corrects the body temperature based on the amount of solar radiation.

4. The ventilation reporting device as claimed in claim 1 or 2, wherein,

the control unit predicts the amount of change in the room temperature by including data on the heat insulating performance of the building.

5. The ventilation reporting device as claimed in claim 1 or 2, wherein,

the control unit predicts the amount of change in the room temperature by including data of an amount of heat generated in the interior of the indoor space.

6. The ventilation reporting device as claimed in claim 1 or 2, wherein,

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

the control unit predicts the amount of change in the room temperature by including data of opening and closing of the window.

7. The ventilation reporting device as claimed in claim 1 or 2, wherein,

comprises a human body detection part for detecting the existence of a person in the indoor space,

the control unit does not transmit the report signal to the report unit if it is determined that the person is not present.

8. The ventilation reporting device as claimed in claim 1 or 2, wherein,

the report section has a sound generating device.

9. The ventilation reporting device as claimed in claim 1 or 2, wherein,

the reporting unit has a light emitting device.

10. The ventilation reporting device as claimed in claim 1 or 2, wherein,

the report section has a communication section for transmitting a signal to an external device.

11. The ventilation reporting device as claimed in claim 1 or 2, wherein,

the report section has a display device.

12. The ventilation reporting device as claimed in claim 1 or 2, wherein,

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

13. The ventilation reporting device as claimed in claim 1 or 2, wherein,

comprises a window opening/closing detecting section for detecting that the window has been opened,

the control unit transmits the report signal prompting the end of the natural ventilation after a window detection setting time elapses from the window opening and closing detection unit detects the opening of the window.

14. The ventilation reporting device as claimed in claim 1 or 2, wherein,

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

15. A storage device for a ventilation report program for performing a report on ventilation of an indoor space in a building,

the ventilation reporting program causes the computer to:

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

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

a step of transmitting a report signal prompting the start of natural ventilation based on the result of the determination to cause the report section to report,

In the step of determining, if the amount of change in the room temperature is predicted to be within a predetermined set amount of change range, it is determined that the heat load in the indoor space is in a middle trend of not increasing and not decreasing, if the amount of change in the room temperature is predicted to be greater than the set amount of change range, it is determined that the heat load in the indoor space is in an increasing trend, if the amount of change in the room temperature is predicted to be less than the set amount of change range, it is determined that the heat load in the indoor space is in a decreasing trend,

in the step of reporting, if it is determined that the intermediate trend is in the increasing trend or the decreasing trend, a report signal prompting the start of natural ventilation is transmitted, and the reporting unit is caused to report.