Room temperature control method, room temperature control device, program, and room temperature control system equipped with the same

Abstract

This makes it possible to effectively suppress condensation indoors under conditions where condensation is highly likely to occur indoors. [Solution] A room temperature control method is a room temperature control method for a building having a room and an air conditioning unit with a cooling function for lowering the room temperature in the room, and determines whether the conditions are such that indoor condensation is likely to occur based on the dew point temperature outside the building and the set temperature set in the air conditioning unit to adjust the room temperature, and if it is determined that the conditions are such that indoor condensation is likely to occur, determines whether the ease of taking in outside air into the room, which is determined by the configuration of the building, is greater than a predetermined intake threshold, and if the ease of taking in outside air is greater than the intake threshold, sets an additional temperature to be added to the set temperature, changes the temperature obtained by adding the additional temperature to the set temperature, and operates the air conditioning unit based on the new set temperature.

Description

[Technical Field]

[0001] The present invention relates to a room temperature control method for a building having an air conditioning unit, a room temperature control device, a program, and a room temperature control system equipped with the same. [Background technology]

[0002] For example, an air conditioner described in Patent Document 1 is known from the past. The air conditioner described in Patent Document 1 includes an indoor unit equipped with a control device and an outdoor unit. A ventilation operation control program stored in the control device calculates a dew point temperature based on the outdoor air temperature and humidity, and then compares the dew point temperature with the indoor air temperature.

[0003] In the air conditioner described in Patent Document 1, when the dew point temperature of the outdoor air during cooling operation is higher than the temperature of the indoor air plus a predetermined temperature, the operation of the ventilation means is limited so that the ventilation means for bringing high-humidity outdoor air, which is prone to condensation, into the room is not activated.This prevents the problem of water vapor contained in the outdoor air condensing between the indoor piping part of the ventilation pipe and the inside of the exhaust fan, as described in Patent Document 1. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-265401 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the air conditioner described in Patent Document 1 restricts the intake of outdoor air when the outdoor dew point temperature is higher than the indoor temperature by a predetermined temperature, but does not adjust the indoor temperature. As a result, in a low-airtight building, outdoor air may be unintentionally taken into the room by the occupants, and even in a high-airtight building, condensation may occur indoors if, for example, the indoor temperature drops to the set temperature set by the occupants after restricting the operation of the ventilation means.

[0006] An object of the present invention is to provide a room temperature control method, a room temperature control device, a program, and a room temperature control system equipped with the same that can effectively suppress condensation indoors under conditions where condensation is highly likely to occur indoors. [Means for solving the problem]

[0007] In order to solve the above problem, a first invention provides a room temperature control method for a building having a room and an air conditioning unit with a cooling function for lowering the room temperature in the room, which determines whether or not the room is in a condition in which condensation is likely to occur based on the dew point temperature outside the building and a set temperature set in the air conditioning unit to adjust the room temperature, and if it is determined that the room is in a condition in which condensation is likely to occur, determines whether or not the ease of taking in outside air into the room, which is determined by the configuration of the building, is greater than a predetermined intake threshold, and if the ease of taking in outside air is greater than the intake threshold, sets an additional temperature to be added to the set temperature, changes the temperature obtained by adding the additional temperature to the set temperature, and operates the air conditioning unit based on the new set temperature.

[0008] According to the first aspect of the present invention, when it is determined that indoor condensation is likely to occur and it is easy to take in outside air into the room, the set temperature of the air conditioner can be changed to a new set temperature that is higher than the set temperature by the additional temperature. This makes it possible to effectively suppress indoor condensation by lowering the room temperature to the new set temperature even in situations where the dew point temperature of the outside air is relatively high.

[0009] In the room temperature control method of the first invention, it is preferable that when the outdoor dew point temperature is higher than the set temperature, it is determined that the situation is such that indoor condensation is likely to occur, and when the ease of intake of outdoor air into the room is greater than the intake threshold, the new set temperature is set to the dew point temperature (second invention).

[0010] According to the second aspect of the present invention, when the ease of taking in outside air is greater than the intake threshold, the new set temperature is raised to the dew point temperature, thereby reliably preventing indoor condensation.

[0011] In the room temperature control method of the first or second invention, it is preferable that when the dew point temperature outside the room is equal to or higher than the set temperature, it is determined that the situation is such that condensation is likely to occur inside the room, and when the ease of taking in outside air into the room is equal to or lower than the intake threshold, the new set temperature is set to be lower than the dew point temperature (third invention).

[0012] According to the third invention, when the ease of taking in outside air is below the intake threshold, that is, when the possibility of indoor condensation is relatively low, it is possible to achieve both suppression of condensation and comfort through air conditioning by keeping the new set temperature below the dew point temperature.

[0013] In the room temperature control methods of the first to third inventions, when the set temperature of the air conditioner is changed to the new set temperature, it is preferable to determine whether the new set temperature exceeds the upper limit of a comfortable temperature range that is preset as a temperature range at which occupants feel comfortable, and if it is determined that the new set temperature exceeds the upper limit of the comfortable temperature range, to lower the new set temperature to a temperature equivalent to the upper limit of the comfortable temperature range and to lower the set humidity set in the air conditioner to adjust the humidity in the room, and to operate the air conditioner based on the changed set temperature and set humidity (fourth invention).

[0014] According to the fourth aspect of the present invention, when an increase in the set temperature to prevent indoor condensation would impair occupant comfort, the set temperature can be lowered to prioritize occupant comfort, while the set humidity can be lowered to suppress the occurrence of indoor condensation. In other words, by lowering the room temperature while using the air conditioner to remove water vapor from the indoor air up to the new set humidity, the occurrence of indoor condensation can be suppressed while maintaining comfort.

[0015] In the room temperature control method of the fourth invention, if the new set temperature is lowered to a temperature corresponding to the upper limit of the comfortable temperature range, it is preferable to notify the occupant that there is a possibility of indoor condensation occurring (fifth invention).

[0016] According to the fifth aspect of the invention, in the fourth aspect, indoor condensation may occur as a result of prioritizing the comfort of the occupants, but by informing the occupants of this in advance, it is possible to prompt the occupants to decide whether to prioritize comfort or preventing indoor condensation, thereby giving the occupants an opportunity to change the set temperature.

[0017] In order to solve the above problem, the sixth invention provides a room temperature control device that controls the air conditioning device in a building having a room and an air conditioning device with a cooling function for lowering the room temperature in the room, the room temperature control device comprising: a judgment unit that determines whether the conditions are such that indoor condensation is likely to occur based on the dew point temperature outside the building and the set temperature set in the air conditioning device to adjust the room temperature, and if it is determined that the conditions are such that indoor condensation is likely to occur, determines whether the ease of taking in outside air into the room, which is determined by the configuration of the building, is greater than a predetermined intake threshold; a temperature setting unit that, if the judgment unit determines that the ease of taking in outside air into the room is greater than the intake threshold, sets an additional temperature to be added to the set temperature and changes the temperature obtained by adding the additional temperature to the set temperature to a new set temperature; and an output unit that outputs a command to operate the air conditioning device based on the new set temperature.

[0018] According to the sixth aspect of the present invention, when it is determined that indoor condensation is likely to occur and it is easy to take in outside air into the room, the set temperature of the air conditioner can be changed to a new set temperature that is higher than the set temperature by the additional temperature. This makes it possible to effectively suppress indoor condensation by lowering the room temperature to the new set temperature even in situations where the dew point temperature of the outside air is relatively high.

[0019] In the room temperature control device of the sixth invention, it is preferable that the judgment unit judges that the situation is such that condensation is likely to occur indoors when the dew point temperature outside the room is higher than the set temperature, and the temperature setting unit sets the new set temperature to the dew point temperature when the ease of intake of outside air into the room is greater than the intake threshold (seventh invention).

[0020] According to the seventh aspect of the present invention, when the ease of taking in outside air is greater than the intake threshold, the new set temperature is raised to the dew point temperature, thereby reliably preventing indoor condensation.

[0021] In the room temperature control devices of the sixth and seventh inventions, it is preferable that the judgment unit judges that the situation is such that condensation is likely to occur indoors when the dew point temperature outside the room is higher than the set temperature, and that the temperature setting unit sets the new set temperature to less than the dew point temperature when the ease of intake of outside air into the room is lower than the intake threshold (eighth invention).

[0022] According to the eighth invention, when the ease of taking in outside air is below the intake threshold, that is, when the possibility of indoor condensation is relatively low, it is possible to achieve both suppression of condensation and comfort through air conditioning by keeping the new set temperature below the dew point temperature.

[0023] In the room temperature control devices of the sixth to eighth inventions, when the set temperature of the air conditioner is changed to the new set temperature, the judgment unit judges whether the new set temperature exceeds the upper limit of a comfortable temperature range that is pre-set as a temperature range at which occupants feel comfortable, and when it is determined that the new set temperature exceeds the upper limit of the comfortable temperature range, the temperature setting unit lowers the new set temperature to a temperature equivalent to the upper limit of the comfortable temperature range, and the room temperature control device further includes a humidity setting unit that lowers the set humidity set in the air conditioner to adjust the humidity in the room when it is determined that the new set temperature exceeds the upper limit of the comfortable temperature range, and it is preferable that the output unit outputs a command to operate the air conditioner based on the set temperature and set humidity changed by the temperature setting unit and the humidity setting unit (ninth invention).

[0024] According to the ninth aspect of the present invention, when an increase in the set temperature to prevent indoor condensation would impair occupant comfort, the set temperature can be lowered to prioritize occupant comfort, while the set humidity can be lowered to suppress the occurrence of indoor condensation. In other words, by lowering the room temperature while using the air conditioning device to remove water vapor from the indoor air up to the new set humidity, the occurrence of indoor condensation can be suppressed while maintaining comfort.

[0025] In the room temperature control device of the ninth invention, it is preferable that the room temperature control device further includes an alarm unit that notifies the occupant of the possibility of indoor condensation when the new set temperature is lowered to a temperature corresponding to the upper limit of the comfortable temperature range (tenth invention).

[0026] According to the tenth aspect of the present invention, in the case of the ninth aspect, indoor condensation may occur as a result of prioritizing the comfort of the occupants, but by informing the occupants of this in advance, it is possible to prompt the occupants to decide whether to prioritize comfort or the prevention of indoor condensation, thereby providing the occupants with an opportunity to change the set temperature.

[0027] In order to solve the above problem, the eleventh invention provides a program implemented in a room temperature control device that controls an air conditioning device in a building having a room and an air conditioning device with a cooling function for lowering the room temperature in the room, the program causing the room temperature control device to function as: a judgment unit that determines whether the conditions are such that indoor condensation is likely to occur based on the dew point temperature outside the building and the set temperature set in the air conditioning device to adjust the room temperature; and, if it is determined that the conditions are such that condensation is likely to occur, determines whether the ease of taking in outside air into the room, which is determined by the configuration of the building, is greater than a predetermined intake threshold; a temperature setting unit that, if the judgment unit determines that the ease of taking in outside air into the room is greater than the intake threshold, sets an additional temperature to be added to the set temperature and changes the temperature obtained by adding the additional temperature to the set temperature to a new set temperature; and an output unit that outputs a command to operate the air conditioning device based on the new set temperature.

[0028] According to the eleventh aspect of the present invention, when it is determined that indoor condensation is likely to occur and it is easy to take in outside air into the room, the set temperature of the air conditioner can be changed to a new set temperature that is higher than the set temperature by the additional temperature. This makes it possible to effectively suppress indoor condensation by lowering the room temperature to the new set temperature even in situations where the dew point temperature of the outside air is relatively high.

[0029] In order to solve the above problem, a twelfth invention provides a room temperature control system installed in a building having a room, the room temperature control system comprising: an air conditioning unit having a cooling function for lowering the room temperature in the room; and a room temperature control device according to any one of the sixth to tenth inventions that controls the air conditioning unit.

[0030] According to the twelfth aspect of the present invention, condensation in the room can be effectively suppressed under conditions where condensation is highly likely to occur indoors.

[0031] In order to solve the above problem, the thirteenth invention provides a room temperature control system installed in a building having a room, comprising an air conditioning unit having a cooling function for lowering the room temperature in the room, and a room temperature control device described in the ninth invention that controls the air conditioning unit, wherein the air conditioning unit has a reheat dehumidification function.

[0032] According to the thirteenth aspect of the present invention, since the reheat dehumidification function is provided, it is possible to lower both the temperature and humidity. [Effects of the Invention]

[0033] According to the present invention, it is possible to effectively suppress condensation indoors under conditions where condensation is highly likely to occur indoors. [Brief explanation of the drawings]

[0034] [Figure 1] 1 is a schematic front view of a building having a room temperature control system according to an embodiment. [Figure 2] FIG. 2 is a block diagram showing the electrical configuration of the room temperature control system according to the embodiment. [Figure 3] 3 is a flowchart showing a process executed by the room temperature control device according to the embodiment. [Figure 4] 4 is a flowchart showing a "set temperature adjustment process" executed by the room temperature control device according to the embodiment. [Figure 5] 4 is a flowchart showing a "comfort adjustment process" executed by the room temperature control device according to the embodiment. [Figure 6] 4 is a timing chart showing changes in dew point temperature and changes in set temperature. DETAILED DESCRIPTION OF THE INVENTION

[0035] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following describes embodiments of the present invention with reference to the accompanying drawings. Note that the following embodiments are examples that embody the present invention and are not intended to limit the technical scope of the present invention.

[0036] An example of a room temperature control system will be described with reference to Figures 1 and 2. Figure 1 is a schematic front view of a building having a room temperature control system according to an embodiment. Figure 2 is a block diagram showing the electrical configuration of the room temperature control system according to an embodiment. As shown in Figures 1 and 2, the room temperature control system includes an air conditioner 1, a room temperature control device 15 capable of communicating with the air conditioner 1 via a communication network or the like, a room temperature detector 14a, an indoor relative humidity detector 14b, and a ventilation device 23.

[0037] The air conditioning device 1 and the ventilation device 23 are provided for a room S in a building that is separated by a side wall 51 and a roof 50 on a foundation 52. A resident lives in the room S. In the following description, the air present in the room S is referred to as "indoor air," and the air present outside the room S is referred to as "outdoor air." In this embodiment, the temperature TT of the outdoor air is the temperature T of the indoor air AI. AI This assumes a hot and humid summer situation where the temperature is higher and the relative humidity HH of the outside air is high.

[0038] The air conditioner 1 adjusts the temperature of the indoor air AI present in the room S. It is also preferable that the air conditioner 1 adjusts the humidity of the indoor air AI present in the room S. In this embodiment, the air conditioner 1 adjusts the temperature T AI The air conditioning function to reduce the humidity H in the room S AI The dehumidification function preferably includes a reheat dehumidification function, which will be described later. In the reheat dehumidification function, a second set humidity Hb is set, which is lower than the first set humidity Ha set in the cooling function.

[0039] Specifically, the air conditioner 1 includes an indoor unit 10 and an outdoor unit 20. The indoor unit 10 is provided on a side wall 51 within a room S. The indoor unit 10 includes a first indoor heat exchanger (not shown), a second indoor heat exchanger (not shown), an indoor fan (not shown), and a housing 17 having an air inlet 17a and an air outlet 17b. The first indoor heat exchanger, the second indoor heat exchanger, and the indoor fan are housed within the housing 17. The air inlet 17a and the air outlet 17b are in communication with each other, and the first indoor heat exchanger and the second indoor heat exchanger are disposed between the air inlet 17a and the air outlet 17b. The air conditioner 1 circulates indoor air AI within the room S. Specifically, indoor air AI is drawn into the housing 17 from within the room S through the air inlet 17a. Furthermore, blown-out air AO is blown out from the housing 17 toward the room S through the air outlet 17b.

[0040] The outdoor unit 20 is installed outside the room S. The outdoor unit 20 includes a housing 27, a compressor (not shown) that compresses a refrigerant, an outdoor heat exchanger (not shown), an outdoor fan (not shown), and an on-off valve (not shown). The compressor, the outdoor heat exchanger, the outdoor fan, and the on-off valve are housed in the housing 27. The first indoor heat exchanger, the second indoor heat exchanger, the compressor, the outdoor heat exchanger, and the on-off valve are connected by refrigerant piping 41 to form a refrigerant circuit. The refrigerant sealed in the refrigerant circuit is not particularly limited, and may be, for example, an HFC (hydrofluorocarbon) refrigerant such as R32 or R410A. The on-off valve is arranged so that when the "reheat dehumidification operation" is performed, the on-off valve opens to allow the refrigerant to flow to the second indoor heat exchanger, and when the "reheat dehumidification operation" is not performed, the on-off valve closes to prevent the refrigerant from flowing to the second indoor heat exchanger.

[0041] The room temperature detector 14a detects the temperature T of the indoor air AI present in the room S. AI The room temperature detector 14a measures the temperature T of the indoor air AI drawn into the air inlet 17a from the room S. AI The room temperature detector 14a is provided near the air inlet 17a to measure the temperature T of the indoor air AI. AIIn order to accurately measure the temperature, it is preferable that the temperature sensor 17 is spaced apart from the air outlet 17b and the ventilation device 23.

[0042] The indoor relative humidity detector 14b detects the humidity H of the indoor air AI present in the room S. AI The indoor relative humidity detector 14b measures the humidity H of the indoor air AI drawn into the air inlet 17a from the room S. AI The indoor relative humidity detector 14b is provided near the air inlet 17a to measure the humidity H of the indoor air AI. AI In order to accurately measure the temperature, it is preferable that the temperature sensor 17 is spaced apart from the air outlet 17b and the ventilation device 23.

[0043] Ventilation device 23 includes intake fan 21a and exhaust fan 21b. Intake fan 21a rotates to supply outside air into room S. Exhaust fan 21b rotates to exhaust indoor air AI from room S. Note that in ventilation device 23, a system in which both intake fan 21a and exhaust fan 21b are driven is called type 1 ventilation, a system in which only intake fan 21a is driven is called type 2 ventilation, and a system in which only exhaust fan 21b is driven is called type 3 ventilation.

[0044] Incidentally, for a building having a room S, the ease with which outside air can be introduced into the room S, which is determined by the configuration of the building (airtightness performance), is determined according to the configuration of the building. One example of the ease with which outside air can be introduced into the room S, which is determined by the configuration of the building, is the C value (equivalent gap area). The C value is a numerical value that indicates "how many gaps GG there are in the house." Specifically, the C value is calculated by dividing the total area of ​​gaps GG formed between the inside of the room S and the outside of the room S by the total floor area of ​​the building. In other words, the smaller the C value, the more airtight the building.

[0045] In this embodiment, the C value of the building having room S is determined by a builder or the like and stored in the memory unit 158 ​​of the room temperature control device 15, which will be described later. In addition, the memory unit 158 ​​of the room temperature control device 15 stores whether the type of ventilation device 23 of the building having room S is type 1 ventilation, type 2 ventilation, or type 3 ventilation.

[0046] Next, a description will be given of the configuration of the room temperature control system for acquiring the properties of the outside air present outside the room S. In this embodiment, the room temperature control system further includes an outside air temperature detector 16 and a relative humidity detector 19.

[0047] The outdoor air temperature detector 16 measures the temperature TT of the outdoor air outside the room S. The relative humidity detector 19 measures the humidity HH of the outdoor air outside the room S. The outdoor air temperature detector 16 and the relative humidity detector 19 are provided in the outdoor unit 20. The outdoor air temperature detector 16 and the relative humidity detector 19 output information to the room temperature control device 15.

[0048] Next, the room temperature control device 15 will be described with reference to Fig. 2. The room temperature control device 15 is composed of a CPU (central processing unit) and storage means (RAM: Random Access Memory and / or ROM: Read Only Memory), etc. Specifically, the room temperature control device 15 may be composed of an information terminal such as a PC (personal computer), tablet, or smartphone. The room temperature control device 15 is configured so that predetermined information, such as operation details, can be input by the occupant present in the room S via an operation panel installed on the side wall 51, etc.

[0049] The air conditioner 1 operates based on information indicating the operation contents set by the occupant. The operation contents include "cooling operation" and "reheat dehumidification operation." In "cooling operation," the on-off valve is closed, causing the first indoor heat exchanger to function as an evaporator, and the outdoor heat exchanger to function as a condenser. Specifically, in "cooling operation," the refrigerant circulates through the compressor, the outdoor heat exchanger, and the first indoor heat exchanger in that order. On the other hand, in "reheat dehumidification operation," the first indoor heat exchanger dehumidifies and cools the outdoor air, and then the dehumidified and cooled outdoor air is reheated by the second indoor heat exchanger and sent indoors. Specifically, in "reheat dehumidification operation," the on-off valve is opened, causing the first indoor heat exchanger to function as an evaporator, the second indoor heat exchanger to function as a reheater, and the outdoor heat exchanger to function as a condenser. In the "reheat dehumidification operation," the refrigerant circulates through the compressor, the outdoor heat exchanger, and the first indoor heat exchanger in that order, and also circulates through the outdoor heat exchanger and the second indoor heat exchanger in that order without passing through the compressor.

[0050] In detail, when performing the "cooling operation," the air conditioner 1 calculates the temperature T of the indoor air AI measured by the room temperature detector 14 based on the cooling setting temperature T S set by the occupant. AI Based on this, the indoor unit 10 and the outdoor unit 20 are controlled to obtain the temperature T AI More specifically, in the "cooling operation", the rotation speed of the compressor is changed, and the outlet temperature T AO In addition, the indoor air AI is adjusted to the outlet temperature T AO As the indoor air AI is cooled to 100°C, the water vapor contained in the indoor air AI condenses on the outer surface of the first indoor heat exchanger. AI decreases to the first set humidity Ha.

[0051] On the other hand, when performing the "reheat dehumidification operation," the air conditioner 1 compares the cooling setting temperature TS set by the occupant with the temperature T of the indoor air AI measured by the room temperature detector 14. AI By controlling the indoor unit 10 and the outdoor unit 20 based on the temperature T AIand humidity H AI More specifically, in the "reheat dehumidification operation," the cooling capacity is first adjusted so that the indoor air AI is cooled to a predetermined temperature TH that is lower than the cooling set temperature TS. As a result, the water vapor contained in the indoor air AI condenses on the outer surface of the first indoor heat exchanger. The humidity H of the indoor air AI is AI The air cooled to a predetermined temperature TH, which is lower than the cooling setting temperature TS, is then cooled by the second indoor heat exchanger to a blowout temperature T AO It is reheated until

[0052] As described above, outside air is taken into room S during ventilation or through gap GG. During "cooling operation," when the outside air taken into room S comes into contact with indoor air AI at the cooling set temperature TS, if the temperature of the outside air cools to or below the dew point temperature TP, the water vapor contained in the outside air condenses and forms condensation. In this embodiment, the cooling capacity of the air conditioner 1 is adjusted by room temperature control device 15 in accordance with the outside air dew point temperature TP, rather than the cooling set temperature TS set by the occupant, so as to prevent condensation of water vapor from the outside air.

[0053] Specifically, the room temperature control device 15 includes a calculation unit 152 , a determination unit 151 , a temperature setting unit 153 , a humidity setting unit 154 , a timer 156 , an output unit 157 , and a storage unit 158 ​​.

[0054] The storage unit 158 ​​is configured by any recording medium such as a hard disk drive (HDD), a solid state drive (SSD), or a semiconductor memory. The storage unit 158 ​​stores a program and basic information in advance. The program is implemented in the room temperature control device 15 that controls the air conditioner 1. The program may be stored on a computer-readable recording medium such as a CD-ROM and provided to the resident. The program may also be stored on a server on the Internet. In this case, the user may operate the room temperature control device 15 to install the program from the server into the storage unit 158.

[0055] The storage unit 158 ​​stores in advance, as basic information indicating airtightness information, the C value of the building having the room S and an intake threshold CT for determining whether the building having the room S is a "highly airtight building" or a "lowly airtight building." The intake threshold CT is set to, for example, "2.0." That is, if the C value is greater than "2.0," the building is determined to be a "lowly airtight building," and if the C value is "2.0" or less, the building is determined to be a "highly airtight building." Note that in the building according to this embodiment, the C value is greater than "2.0," and the building according to this embodiment is determined to be a "lowly airtight building."

[0056] Furthermore, the memory unit 158 ​​stores, as basic information indicating airtightness information, whether the type of ventilation device 23 of the building having the room S is type 1 ventilation, type 2 ventilation, or type 3 ventilation. Note that the type of ventilation device 23 according to this embodiment is a type in which only the exhaust fan 22 is driven, and is therefore "type 3 ventilation."

[0057] The calculation unit 152 calculates the dew point temperature TP of the outside air based on the temperature TT of the outside air measured by the outside air temperature detector 16 and the humidity HH of the outside air measured by the relative humidity detector 19 .

[0058] The determination unit 151 determines whether indoor condensation is likely to occur based on the dew-point temperature TP calculated by the calculation unit 152 and the cooling setting temperature TS. Specifically, the determination unit 151 determines that indoor condensation is likely to occur when the dew-point temperature TP of the outdoor air is equal to or higher than the cooling setting temperature TS. In other words, the determination unit 151 determines that when outdoor air with a dew-point temperature TP equal to or higher than the cooling setting temperature TS comes into contact with indoor air AI at the cooling setting temperature TS, the outdoor air temperature is cooled to the dew-point temperature TP, and water vapor contained in the outdoor air condenses and forms condensation. On the other hand, the determination unit 151 determines that indoor condensation is unlikely to occur when the dew-point temperature TP is lower than the cooling setting temperature TS. In other words, the determination unit 151 determines that when outdoor air with a dew-point temperature TP lower than the cooling setting temperature TS comes into contact with indoor air AI at the cooling setting temperature TS, water vapor contained in the outdoor air will not condense, even if the outdoor air temperature is cooled to the cooling setting temperature TS.

[0059] Furthermore, when it is determined that the situation is such that indoor condensation is likely to occur, the determination unit 151 determines whether the ease of taking in outdoor air into the room is greater than the intake threshold value CT. Specifically, the determination unit 151 determines whether the C value is greater than the intake threshold value CT. When the C value is greater than the intake threshold value CT, the determination unit 151 determines that outdoor air is being taken into the room S. On the other hand, when the C value is equal to or less than the intake threshold value CT, the determination unit 151 determines that almost no outdoor air is being taken into the room S.

[0060] When the determination unit 151 determines that the C value is greater than the intake threshold value CT, the temperature setting unit 153 sets an additional temperature Tα to be added to the cooling set temperature TS, and changes the cooling set temperature TS to a new set temperature TS' by adding the additional temperature Tα. In other words, when the temperature of the outside air taken into the room S reaches the cooling set temperature TS, the water vapor contained in the outside air condenses and forms dew, so the temperature setting unit 153 changes the set temperature from the cooling set temperature TS to the new set temperature TS'. Specifically, the new set temperature TS' is set to be the dew point temperature TP. As a result, even if a relatively large amount of outside air is taken into the room S for ventilation, the temperature T in the room S AI does not become lower than the dew point temperature TP, it is possible to prevent water vapor from the outside air from condensing.

[0061] On the other hand, when the determination unit 151 determines that the C value is equal to or less than the intake threshold value CT, the temperature setting unit 153 sets the new set temperature TS' to be less than the dew-point temperature TP. In other words, it has been determined that the situation is such that indoor condensation is likely to occur, but because almost no outside air is being taken into the room S, the temperature setting unit 153 changes the set temperature from the cooling set temperature TS to the new set temperature TS'. Specifically, the new set temperature TS' is set to be the dew-point temperature TP - 1°C. As a result, because the amount of outside air taken into the room S for ventilation is small, it is possible to suppress condensation of water vapor from the outside air.

[0062] Furthermore, when the determination unit 151 determines that the C value is equal to or less than the intake threshold value CT, the temperature setting unit 153 may determine whether the type of ventilation device 23 of the building containing room S is "type 1 ventilation." Specifically, when the type of ventilation device 23 of the building containing room S is not "type 1 ventilation," the new set temperature TS' is set to the dew-point temperature TP. As a result, even if outside air is taken into room S, the temperature of the outside air does not drop below the dew-point temperature TP, thereby preventing condensation of water vapor contained in the outside air. On the other hand, when the type of ventilation device 23 of the building containing room S is "type 1 ventilation," the new set temperature TS' is set to the dew-point temperature TP - 1°C. As a result, the amount of outside air taken into room S for ventilation is small, preventing condensation of water vapor from the outside air.

[0063] The output unit 157 outputs a command to operate the air conditioner 1 based on the set temperature TS′ changed by the temperature setting unit 153. Specifically, the room temperature T AI The output unit 157 outputs a signal so that the temperature T becomes one of the "cooling set temperature TS", the "dew-point temperature TP", and the "dew-point temperature TP-1°C".

[0064] As explained above, according to this embodiment, when it is determined that indoor condensation is likely to occur and it is easy to take in outside air into the room S, the set temperature of the air conditioner 1 can be changed to a new set temperature TS' that is higher than the cooling set temperature TS by the additional temperature Tα. As a result, even in a situation where the dew point temperature TP of the outside air is relatively high, the room temperature T AI By lowering the temperature, indoor condensation can be effectively suppressed.

[0065] Specifically, when the ease of intake of outside air is greater than the intake threshold CT, indoor condensation can be reliably prevented by raising the new set temperature TS' to the dew point temperature TP. Also, when the amount of outside air taken into the room for ventilation is small and the possibility of indoor condensation is relatively low, it is possible to suppress condensation while still providing comfort through cooling by keeping the new set temperature TS' below the dew point temperature TP.

[0066] Referring again to Figure 2, the configuration of the room temperature control system for improving the comfort of the occupants will be described in detail. The room temperature control system further includes an alarm unit 18. The room temperature control device 15 further includes a humidity setting unit 154.

[0067] The storage unit 158 ​​further stores the upper limit Tx and the lower limit Tx of the comfortable temperature range as basic information indicating the comfortable temperature. AI The upper limit Tx of the comfortable temperature range is not particularly limited, but is, for example, 28°C.

[0068] When the cooling setting temperature TS of the air conditioning device 1 is changed to a new setting temperature TS', the judgment unit 151 judges whether the new setting temperature TS' exceeds the upper limit Tx of the comfortable temperature range that is preset as the temperature range at which the occupants feel comfortable.

[0069] If it is determined that the new set temperature TS' exceeds the upper limit Tx of the comfortable temperature range, the temperature setting unit 153 lowers the new set temperature TS' to a temperature TS'' that corresponds to the upper limit Tx of the comfortable temperature range.

[0070] When it is determined that the new set temperature TS' exceeds the upper limit Tx of the comfortable temperature range, the humidity setting unit 154 adjusts the humidity H AI In order to adjust the room temperature T AIBy lowering the humidity Hb and using the air conditioner 1 to remove water vapor from the indoor air AI up to the new second set humidity Hb, it is possible to suppress the occurrence of indoor condensation while maintaining comfort.

[0071] The output unit 157 outputs a command to operate the air conditioner 1 based on the set temperature TS'' and second set humidity Hb changed by the temperature setting unit 153 and the humidity setting unit 154. Specifically, when the new set temperature TS' is lowered to a temperature TS'' corresponding to the upper limit Tx of the comfortable temperature range, the output unit 157 outputs a command to the air conditioner 1 to perform "reheat dehumidification operation."

[0072] Furthermore, when the new set temperature TS' is lowered to a temperature TS'' corresponding to the upper limit Tx of the comfortable temperature range, the notification unit 18 notifies the occupant that there is a possibility of indoor condensation occurring. The notification unit 18 is, for example, a speaker that conveys predetermined information audibly or a display device that conveys predetermined information visually. AI will be lowered below the new set temperature TS', so even if the air conditioning device 1 removes water vapor from the indoor air AI down to the new second set humidity Hb, there is a possibility that indoor condensation will occur as a result of prioritizing the comfort of the occupants. By notifying the occupants of this in advance, it is possible to prompt the occupants to decide whether to prioritize comfort or preventing indoor condensation. In other words, it is possible to give the occupants an opportunity to change the set temperature TS''.

[0073] Next, the reference temperature TB will be described. The reference temperature TB indicates the temperature that is normally set as the cooling setting temperature TS when the occupant performs "cooling operation." The reference temperature TB is stored in the memory unit 158.

[0074] When it is determined that the situation is not prone to indoor condensation, and the reference temperature TB is lower than the cooling set temperature TS and higher than the dew point temperature TP, the determination unit 151 may set a new set temperature TS' to the reference temperature TB. AIEven if the reference temperature TB reaches the reference temperature TB, the temperature of the outside air taken into the room S for ventilation will not fall below the dew-point temperature TP. As a result, it is possible to prevent water vapor from the outside air from condensing. On the other hand, when the reference temperature TB is either equal to or higher than the cooling set temperature TS or equal to or lower than the dew-point temperature TP, the determination unit 151 maintains the new set temperature TS'.

[0075] The output unit 157 outputs a command to operate the air conditioner 1 based on the set temperature TS′ changed by the temperature setting unit 153. Specifically, the room temperature T AI The output unit 157 outputs a signal so that the temperature T b becomes one of the "cooling setting temperature TS", the "dew-point temperature TP", the "dew-point temperature TP-1°C", and the "reference temperature TB".

[0076] Next, a room temperature control method executed by the room temperature control device 15 according to the embodiment will be described in detail with reference to Fig. 3. Fig. 3 is a flowchart showing the processing executed by the room temperature control device 15. As shown in Fig. 3, the room temperature control method includes steps S101 to S106.

[0077] As described above, the memory unit 158 ​​pre-stores the C value of the building having the room S and the intake threshold CT as basic information indicating the airtightness performance. Furthermore, the memory unit 158 ​​pre-stores, as basic information indicating the airtightness performance, whether the ventilation system 23 of the building having the room S is a type 1 ventilation, a type 2 ventilation, or a type 3 ventilation. The memory unit 158 ​​also pre-records the upper limit Tx of the comfortable temperature range as basic information indicating the comfortable temperature. Furthermore, the memory unit 158 ​​pre-records the reference temperature TB included in the basic information. In step S101, the room temperature control device 15 acquires (reads) the basic information from the memory unit 158.

[0078] In step S102, the timer 156 starts measuring the elapsed time.

[0079] In step S103, the outside air temperature detector 16 measures the temperature TT of the outside air, and the relative humidity detector 19 measures the relative humidity HH of the outside air.

[0080] In step S104, the calculation unit 152 calculates the dew point temperature TP of the outside air based on the temperature TT of the outside air measured by the outside air temperature detector 16 and the humidity HH of the outside air measured by the relative humidity detector 19.

[0081] In step S105, the room temperature control device 15 acquires from the air conditioner 1 predetermined information (cooling set temperature TS), such as the operation details input by the occupant.

[0082] In step S106, as a result of steps S101 to S105 being completed, the room temperature controller 15 acquires the dew point temperature TP and the cooling set temperature TS, and then executes the "set temperature adjustment process" shown in FIG.

[0083] Next, the "set temperature adjustment process" executed by the room temperature control device 15 according to the embodiment will be described in detail with reference to Fig. 4. Fig. 4 is a flowchart showing the "set temperature adjustment process" executed by the room temperature control device 15. As shown in Fig. 4, the "set temperature adjustment process" includes steps S201 to S212.

[0084] In step S201, the determination unit 151 determines whether the dew-point temperature TP is equal to or higher than the cooling setting temperature TS. If it is determined that the dew-point temperature TP is equal to or higher than the cooling setting temperature TS, the process proceeds to step S202.

[0085] In step S202, the determination unit 151 determines whether the C value is equal to or less than the intake threshold value of 2.0. If it is determined that the C value is not equal to or less than the intake threshold value of 2.0, the process proceeds to step S203. In step S203, the temperature setting unit 153 sets the new set temperature TS' to be equal to the dew-point temperature TP. As a result, even if a large amount of outside air is taken into the room S for ventilation, the temperature of the outside air does not fall below the dew-point temperature TP, and therefore, condensation of water vapor from the outside air can be suppressed.

[0086] On the other hand, if it is determined in step S202 that the C value is equal to or less than the intake threshold value "2.0", the process proceeds to step S204. In step S204, the temperature setting unit 153 determines whether the type of ventilation device 23 of the building that has room S is "first type ventilation".

[0087] If it is determined that the type of ventilation device 23 of the building containing room S is not "type 1 ventilation," the process proceeds to step S203 described above. On the other hand, if it is determined that the type of ventilation device 23 of the building containing room S is "type 1 ventilation," the process proceeds to step S205. In step S205, the temperature setting unit 153 sets the new set temperature TS' to the dew point temperature TP - 1°C. As described above, if it is determined in step 202 that the C value is equal to or less than the intake threshold value of "2.0" and if it is determined in step S203 that the type is "type 1 ventilation," the amount of outside air taken into room S for ventilation is small. Therefore, there is little water vapor from the outside air in room S, and condensation of this water vapor can be suppressed.

[0088] After step S203 or step S205 is completed, the room temperature controller 15 determines a new set temperature TS', and then in step S206, executes the "comfort adjustment process" shown in FIG.

[0089] On the other hand, if it is determined in step S201 that the dew-point temperature TP is not equal to or higher than the cooling setting temperature TS, that is, that the situation is not prone to indoor condensation, the process proceeds to step S207. In step S207, the determination unit 151 determines whether the reference temperature TB is equal to or higher than the cooling setting temperature TS. If it is determined that the reference temperature TB is not equal to or higher than the cooling setting temperature TS, the process proceeds to step S208. In step S208, the cooling setting temperature TS is maintained.

[0090] On the other hand, if it is determined that the reference temperature TB is equal to or higher than the cooling setting temperature TS, the process proceeds to step S209. In step S209, the determination unit 151 determines whether the reference temperature TB is equal to or lower than the dew-point temperature TP. If it is determined that the reference temperature TB is equal to or lower than the dew-point temperature TP, the process proceeds to step S208 described above.

[0091] On the other hand, if it is determined that the reference temperature TB is greater than the dew-point temperature TP, the process proceeds to step S210. In step S210, a new set temperature TS' is set to the reference temperature TB. As a result, the room temperature T AI Even if the temperature of the outside air taken into the room S reaches the reference temperature TB, the temperature of the outside air taken in for ventilation will not fall below the dew point temperature TP. Therefore, it is possible to prevent the water vapor from the outside air from condensing.

[0092] After step S208 or step S210 is completed, in step S211, it is determined whether or not a predetermined time (for example, one hour) has elapsed since the timer 156 started measuring the elapsed time (step S102). If the room temperature control device 15 determines that the predetermined time has not elapsed since the start of measuring the elapsed time, the process returns to step S207.

[0093] On the other hand, if it is determined in step S211 that the predetermined time has elapsed since the timer 156 started measuring the elapsed time, the process proceeds to step S212. In step S212, the elapsed time is reset, and the process returns to step S101.

[0094] Next, the "comfort adjustment process" for improving the comfort of the occupants will be described in detail with reference to Fig. 5. Fig. 5 is a flowchart showing the "comfort adjustment process" executed by the air conditioning system. As shown in Fig. 5, the "comfort adjustment process" includes steps S301 to S309.

[0095] In step S301, the determination unit 151 determines whether the new set temperature TS' exceeds the upper limit Tx of the comfortable temperature range. If the determination unit 151 determines that the new set temperature TS' exceeds the upper limit Tx of the comfortable temperature range, the process proceeds to step S302.

[0096] In step S302, the new set temperature TS' is set to the upper limit Tx of the comfortable temperature range. In other words, if an increase in the new set temperature TS' to prevent indoor condensation would reduce the comfort of the occupants, the new set temperature TS' is lowered to prioritize the comfort of the occupants. After step S302, the process proceeds to step S303.

[0097] In step S303, the humidity setting unit 154 lowers the set humidity Ha set in the air conditioner 1. Specifically, the air conditioner 1 performs a "reheat dehumidification operation." After performing the "reheat dehumidification operation," the processing proceeds to step S304.

[0098] In step S304, the notification unit 18 notifies the occupant that there is a possibility of indoor condensation occurring, and the process proceeds to step S305.

[0099] In step S305, it is determined whether or not a predetermined time has elapsed since the timer 156 started measuring the elapsed time (step S102). If the room temperature control device 15 determines that the predetermined time has not elapsed since the start of measuring the elapsed time, the process returns to step S302.

[0100] On the other hand, if it is determined in step S305 that the predetermined time has elapsed since the timer 156 started measuring the elapsed time, the process proceeds to step S306. In step S306, the elapsed time is reset, and the process returns to step S101.

[0101] On the other hand, if the judgment unit 151 judges that the upper limit Tx of the comfortable temperature range is equal to or greater than the new set temperature TS', the process proceeds to step S307. In step S307, the new set temperature TS' is maintained because it is within the comfortable temperature range.

[0102] In step S308, it is determined whether or not a predetermined time has elapsed since the timer 156 started measuring the elapsed time (step S102). If the room temperature control device 15 determines that the predetermined time has not elapsed since the start of measuring the elapsed time, the process returns to step S307.

[0103] On the other hand, if it is determined in step S308 that the predetermined time has elapsed since the timer 156 started measuring the elapsed time, the process proceeds to step S309. In step S309, the elapsed time is reset, and the process returns to step S101.

[0104] Next, referring to Fig. 6, an example of the effect of performing "cooling operation" by the air conditioning apparatus 1 will be described. Fig. 6 shows a timing chart showing changes in dew point temperature TP and set temperature TS. In Fig. 6, the vertical axis represents temperature and the horizontal axis represents time. The dotted line represents changes in the outdoor dew point temperature TP. The solid line represents changes in the set temperature TS. The upper limit Tx of the comfortable temperature range is 28°C.

[0105] The dew-point temperature TP changes with the change in time t. Specifically, the dew-point temperature TP is 22°C at time t0, 26°C at time t1, and 26.5°C at time t2.

[0106] Furthermore, in the building according to this embodiment, the C value is greater than "2.0," making the building according to this embodiment a "low-airtight building." The ventilation system of the ventilation device 23 according to this embodiment is a system in which only the exhaust fan 22 is driven, which is "type 3 ventilation." The memory unit 158 ​​pre-stores the reference temperature TB described above as a base temperature for adjusting the cooling set temperature TS when the cooling set temperature TS is changed to a new set temperature TS' by adding the additional temperature Tα, and the dew-point temperature TP becomes lower than the new set temperature TS'. The reference temperature TB is, for example, 25°C. Furthermore, at time t0, the occupant inputs a command to perform "cooling operation" with the cooling set temperature TS set to 25°C.

[0107] At time t0, the cooling setting temperature TS is 25° C. and the dew-point temperature TP is 23° C., so the determination unit 151 determines that the cooling setting temperature TS is equal to or higher than the dew-point temperature TP, and therefore maintains the cooling setting temperature TS.

[0108] At time t1, the cooling setting temperature TS is 25°C and the dew-point temperature TP is 26°C, so the determination unit 151 determines that the cooling setting temperature TS is less than the dew-point temperature TP, and so the temperature setting unit 153 sets a new setting temperature TS' to the dew-point temperature TP. As a result, the new setting temperature TS' becomes 26°C. Therefore, even if a large amount of outside air is taken into the room S for ventilation, the temperature of the outside air does not fall below the dew-point temperature TP, and it is possible to prevent water vapor from the outside air from condensing.

[0109] At time t2, the cooling setting temperature TS is 26°C and the dew-point temperature TP is 26.5°C. Therefore, the determination unit 151 determines that the cooling setting temperature TS is less than the dew-point temperature TP, and the temperature setting unit 153 sets a new setting temperature TS' to the dew-point temperature TP. As a result, the new setting temperature TS' becomes 26.5°C. Therefore, even if a large amount of outside air is taken into the room S for ventilation, the temperature of the outside air does not fall below the dew-point temperature TP, and it is possible to prevent water vapor from the outside air from condensing.

[0110] At time t3, the cooling setting temperature TS is 26.5°C and the dew-point temperature TP is 28°C, so the determination unit 151 determines that the cooling setting temperature TS is less than the dew-point temperature TP, and so the temperature setting unit 153 sets a new setting temperature TS' to the dew-point temperature TP. As a result, the new setting temperature TS' becomes 28°C. Therefore, even if a large amount of outside air is taken into the room S for ventilation, the temperature of the outside air does not fall below the dew-point temperature TP, and it is possible to prevent water vapor from the outside air from condensing.

[0111] At time t4, the cooling setting temperature TS is 28°C and the dew-point temperature TP is 29°C, so the determination unit 151 determines that the cooling setting temperature TS is less than the dew-point temperature TP, and so the temperature setting unit 153 sets a new setting temperature TS' to be equal to the dew-point temperature TP. As a result, the new setting temperature TS' becomes 29°C. Next, the determination unit 151 determines that the new setting temperature TS' exceeds the upper limit Tx of the comfortable temperature range, so the temperature setting unit 153 sets a new setting temperature TS'' to be equal to the upper limit Tx. As a result, the new setting temperature TS'' becomes 28°C.

[0112] Since the temperature setting unit 153 has set the new set temperature TS'' to be the upper limit Tx, the humidity setting unit 154 lowers the set humidity Ha set in the air conditioner 1. Specifically, the air conditioner 1 performs a "reheat dehumidification operation." That is, when the room temperature T AI By lowering the humidity Hb and using the air conditioner 1 to remove water vapor from the indoor air AI up to the new second set humidity Hb, it is possible to suppress the occurrence of indoor condensation while maintaining comfort.

[0113] After the cooling set temperature TS is changed to a new set temperature TS' by adding the additional temperature Tα, if the new set temperature TS' (cooling set temperature TS) exceeds the dew-point temperature TP and the dew-point temperature TP becomes equal to or higher than the reference temperature TB (basic temperature), as at times ta and tb, the temperature setting unit 153 sets the new set temperature TS' to the reference temperature TB (basic temperature). As a result, the new set temperature TS' becomes 25°C.

[0114] As explained above, according to this embodiment, when it is determined that indoor condensation is likely to occur and it is easy to take in outside air into the room S, the set temperature of the air conditioner 1 can be changed to a new set temperature TS' that is higher than the cooling set temperature TS by the additional temperature Tα. As a result, even in a situation where the dew point temperature TP of the outside air is relatively high, the room temperature T AI By lowering the temperature, indoor condensation can be effectively suppressed.

[0115] The present invention is not limited to the above-described embodiment, and the following aspects may also be adopted, for example.

[0116] In the above embodiment, the calculation unit 152 calculated the outdoor dew point temperature TP based on the outdoor air temperature TT measured by the outdoor air temperature detector 16 and the outdoor air humidity HH measured by the relative humidity detector 19. However, the communication unit may wirelessly connect to a network N such as the Internet through a public circuit via a base station antenna, which is a fixed facility, and obtain the outdoor dew point temperature TP from a server. [Explanation of symbols]

[0117] 1. Air conditioning equipment 15 Room temperature control device 18. Information Department 151 Judgment section 152 Calculation Unit 153 Temperature setting section 154 Humidity setting section 157 Output section S room

Claims

1. A room temperature control method in a building having a room and an air conditioning device having a cooling function for lowering a room temperature in the room, comprising: A determination is made as to whether or not indoor condensation is likely to occur based on the dew point temperature outside the building and the set temperature set in the air conditioning device to adjust the room temperature, and if it is determined that the indoor condensation is likely to occur, a determination is made as to whether or not the ease of taking in outdoor air into the room, which is determined by the configuration of the building, is greater than a preset intake threshold; When the ease of taking in outside air is greater than the intake threshold, an additional temperature to be added to the set temperature is set, and the temperature obtained by adding the additional temperature to the set temperature is changed to a new set temperature; A room temperature control method that operates the air conditioner based on the new set temperature.

2. When the outdoor dew point temperature is equal to or higher than the set temperature, it is determined that the indoor condensation is likely to occur, The room temperature control method according to claim 1 , wherein the new set temperature is set to the dew point temperature when the ease of taking in outside air into the room is greater than the intake threshold value.

3. When the outdoor dew point temperature is equal to or higher than the set temperature, it is determined that the indoor condensation is likely to occur, The room temperature control method according to claim 1 , wherein the new set temperature is set to be lower than the dew point temperature when the ease of taking in outside air into the room is equal to or lower than the intake threshold value.

4. When the set temperature of the air conditioning device is changed to the new set temperature, it is determined whether the new set temperature exceeds an upper limit of a comfortable temperature range that is preset as a temperature range in which an occupant feels comfortable; A room temperature control method according to any one of claims 1 to 3, wherein, if it is determined that the new set temperature exceeds the upper limit of the comfortable temperature range, the new set temperature is lowered to a temperature equivalent to the upper limit of the comfortable temperature range, and the set humidity set in the air conditioning device is lowered to adjust the humidity in the room, and the air conditioning device is operated based on the changed set temperature and set humidity.

5. 5. The room temperature control method according to claim 4, further comprising the step of notifying an occupant that there is a possibility of indoor condensation occurring when the new set temperature is lowered to a temperature corresponding to an upper limit of the comfortable temperature range.

6. A room temperature control device that controls an air conditioner in a building having a room and an air conditioner having a cooling function for lowering a room temperature in the room, a determination unit that determines whether or not indoor condensation is likely to occur based on the dew point temperature outside the building and a set temperature set in the air conditioning device to adjust the room temperature, and, when it is determined that the indoor condensation is likely to occur, determines whether the ease of taking in outdoor air into the room, which is determined by the configuration of the building, is greater than a preset intake threshold; a temperature setting unit that, when the determination unit determines that the ease of taking in outside air into the room is greater than an intake threshold, sets an additional temperature to be added to the set temperature and changes the temperature obtained by adding the additional temperature to the set temperature to a new set temperature; an output unit that outputs a command to operate the air conditioning device based on the new set temperature.

7. The determination unit determines that the indoor condensation is likely to occur when the outdoor dew point temperature is equal to or higher than the set temperature, The room temperature control device according to claim 6 , wherein the temperature setting unit sets the new set temperature to the dew point temperature when the ease of taking in outside air into the room is greater than the intake threshold value.

8. The determination unit determines that the indoor condensation is likely to occur when the outdoor dew point temperature is equal to or higher than the set temperature, The room temperature control device according to claim 6 , wherein the temperature setting unit sets the new set temperature to a temperature lower than the dew point temperature when the ease of taking in outside air into the room is equal to or lower than the intake threshold value.

9. when the set temperature of the air conditioning apparatus is changed to the new set temperature, the determination unit determines whether the new set temperature exceeds an upper limit of a comfortable temperature range that is preset as a temperature range in which an occupant feels comfortable; When it is determined that the new set temperature exceeds an upper limit of the comfortable temperature range, the temperature setting unit lowers the new set temperature to a temperature corresponding to the upper limit of the comfortable temperature range, The room temperature control device further includes a humidity setting unit that reduces the set humidity set in the air conditioner to adjust the humidity of the room when it is determined that the new set temperature exceeds an upper limit of a comfortable temperature range, The room temperature control device according to any one of claims 6 to 8, wherein the output unit outputs a command to operate the air conditioning device based on the set temperature and set humidity changed by the temperature setting unit and the humidity setting unit.

10. 10. The room temperature control device according to claim 9, further comprising an alarm unit that notifies an occupant of the possibility of indoor condensation when the new set temperature is lowered to a temperature corresponding to an upper limit of the comfort temperature range.

11. A program implemented in a room temperature control device that controls an air conditioning device in a building having a room and an air conditioning device having a cooling function for lowering a room temperature in the room, a determination unit that determines whether or not indoor condensation is likely to occur based on the dew point temperature outside the building and a set temperature set in the air conditioning device to adjust the room temperature, and, when it is determined that the indoor condensation is likely to occur, determines whether the ease of taking in outdoor air into the room, which is determined by the configuration of the building, is greater than a preset intake threshold; a temperature setting unit that, when the determination unit determines that the ease of taking in outside air into the room is greater than an intake threshold, sets an additional temperature to be added to the set temperature and changes the temperature obtained by adding the additional temperature to the set temperature to a new set temperature; an output unit that outputs a command to operate the air conditioning device based on the new set temperature; and causing the room temperature control device to function.

12. A room temperature control system provided in a building having a room, an air conditioning device having a cooling function for lowering the room temperature in the room; A room temperature control system comprising: the room temperature control device according to any one of claims 6 to 8, which controls the air conditioning device.

13. A room temperature control system provided in a building having a room, an air conditioning device having a cooling function for lowering the room temperature in the room; and a room temperature control device according to claim 9 that controls the air conditioning device, A room temperature control system, wherein the air conditioning device has a reheat dehumidification function.

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