JP2020176779A - Controller, dew condensation suppressing method and program - Google Patents

Abstract

To suppress dew condensation on a humidity conditioning device provided in the whole building air conditioning system.SOLUTION: A controller 70 controls a humidifier 20 connected to one or more main ducts 3a, 3b via a sub duct 30 and a blower fan 40 connected to the humidifier 20 via a blower duct 50. The controller 70 includes: an acquisition unit 72 for acquiring information on an opening/closing state of air volume control dampers 80a, 80b provided in ends of the main ducts 3a, 3b; a determination unit 74 for determining whether the humidifier 20 satisfies a dew condensation condition on the basis of the information on the opening/closing state of the dampers which is acquired by the acquisition unit; and a control unit 76 for actuating the blower fan 40 when the determination unit 74 determines that the humidifier 20 satisfies the dew condensation condition.SELECTED DRAWING: Figure 3

Description

The present invention relates to a technique for suppressing the occurrence of dew condensation in a humidity control device provided in an air conditioning system in a whole building.

In the whole building air conditioning system, the whole building is air-conditioned by supplying air-conditioning air such as cold air or hot air produced and sent by the air conditioner to each room through a duct. A humidified air transport system is known in which a humidifying unit that creates humidified air is added to such a whole building air conditioning system, and the humidified air from the humidifying unit is supplied together with the air conditioning air from the air conditioner (for example, Patent Documents). 1).

This humidified air transport system is composed of a whole building air conditioning system having a cooling and heating function and a humidifying unit that produces humidified air (humidified air). Here, an air outlet connected to the humidifying unit via a duct is installed adjacent to the indoor air suction port of the indoor unit of the air conditioning system in the entire building. Then, by sucking the humidified air blown out from the outlet of the humidification unit directly from the indoor air suction port, the humidified air is supplied to the air conditioning system in the entire building, and the humidified air is supplied together with the air conditioning air to increase the temperature and humidity of the entire building. Be homogenized.

In connection with this, a sub-duct through which the humidified air sent from the humidifying unit flows is connected to the main duct through which the air-conditioned air sent from the air conditioner flows, and the humidified air is merged with the air-conditioned air and supplied to the entire building. A type of whole building air conditioning system is also known.

Japanese Unexamined Patent Publication No. 2003-302075

In general, the humidifying unit (humidifier) is often stopped when the air conditioner is used, for example, in summer. At this time, as described above, in the whole building air conditioning system of the type in which the sub duct through which the humidified air flows is connected to the main duct through which the air conditioning air flows, the cold air sent from the air conditioner may flow back to the humidifier via the sub duct. .. Since the humidifier itself is generally placed in a concealed place such as the attic, the humidifier is in a hot and humid environment, especially in a climate such as summer. When cold air flows back into the humidifier in such a situation, the humidifier is cooled by the cold air flowing back, the temperature of the air around the humidifier is lowered, the saturated water vapor amount is reduced, and the humidifier may condense. Since the occurrence of such dew condensation causes a malfunction for the humidifier and other humidity control devices that adjust the humidity, improvements such as suppressing the occurrence of dew condensation are required.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to suppress the occurrence of dew condensation in a humidity control device provided in an air conditioning system in the entire building.

The controller according to the present invention is a controller that controls a humidity control device connected to one or more main ducts via a subduct, and a blower fan connected to the humidity control device via a blower duct. Based on the open / closed state of the damper provided at the end of the main duct, the determination unit determines whether or not the humidity control device satisfies the condition for dew condensation, and the determination unit determines that the humidity control device satisfies the condition for dew condensation. It is characterized by including a control unit for activating the blower fan when the blower fan is used.

According to the present invention, since it is configured as described above, it is possible to suppress the occurrence of dew condensation in the humidity control device provided in the air conditioning system in the entire building.

It is a figure which shows the configuration example of the whole building air-conditioning system provided with the controller which concerns on Embodiment 1 of this invention. It is a figure which showed typically the structure around the humidifier in the whole building air-conditioning system equipped with the controller which concerns on Embodiment 1 of this invention. It is a figure which shows the structural example of the controller which concerns on Embodiment 1 of this invention. It is a flowchart which shows the flow of control by the controller which concerns on Embodiment 1 of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Embodiment 1.
FIG. 1 is a diagram showing a configuration example of a whole building air conditioning system including a controller according to the first embodiment of the present invention. This whole building air conditioning system air-conditions a plurality of rooms, and here, when the rooms 100a and 100b on the first floor and the rooms 200c and 200d on the second floor in the building are targeted. Is shown as an example. Further, here, a case where the humidity control device is the humidifier 20 described later is shown as an example.

The entire building air-conditioning system includes an air-conditioning device 1 that creates and sends out cold air or hot air, a supply chamber 2 into which the air created by the air-conditioning device 1 is introduced, and main ducts 3a and 3b having one end connected to the supply chamber 2. Branch chambers 4a and 4b to which the other ends of the main ducts 3a and 3b are connected, branch ducts 5a to 5d connecting the branch chambers 4a and 4b and outlets 7a to 7d in each room, intake of outside air and indoor air. A ventilation device 6 that is responsible for discharging the air conditioner, a humidifier 20 that creates humidified air, a sub duct 30 that connects the humidifier 20 and the main ducts 3a and 3b, a blower fan 40 that blows air to the humidifier 20, and a humidifier 20. It is configured to include a blower duct 50 for connecting the blower fan 40 and a blower duct 50.

The air conditioner 1 is composed of an indoor unit 11 installed in the machine room 200e inside the building and an outdoor unit 12 installed outside the building, and the indoor unit 11 is operated by the action of a refrigerant, a compressor, a heat exchanger, a fan, and the like. Creates cold air or hot air (hereinafter referred to as conditioned air) and sends it out. The conditioned air created and sent out by the indoor unit 11 in collaboration with the outdoor unit 12 is introduced into the supply chamber 2 installed above the indoor unit 11.

One ends of two main ducts 3a and 3b are connected to the supply chamber 2, and the conditioned air introduced into the supply chamber 2 from the indoor unit 11 branches into two main ducts 3a and 3b. .. The other ends of the main ducts 3a and 3b are connected to the branch chambers 4a and 4b, respectively. The branch chambers 4a and 4b are installed, for example, in the space behind the ceiling.
One ends of two branch ducts 5a and 5b are connected to the branch chamber 4a, and the conditioned air introduced into the branch chamber 4a from the main duct 3a branches into two branch ducts 5a and 5b. .. Similarly, one end of two branch ducts 5c and 5d is connected to the branch chamber 4b, and the conditioned air introduced into the branch chamber 4b from the main duct 3b is two to the branch ducts 5c and 5d. Branch to.

The other ends of the branch ducts 5a to 5d are connected to outlets 7a to 7d provided in, for example, the ceiling of the rooms 100a, 100b, 200c, and 200d, respectively, and the conditioned air sent by the indoor unit 11 is finally used. It is blown into each room from the outlets 7a to 7d. In the illustrated example, the air conditioning zones are set for each floor by air-conditioning the rooms 100a and 100b on the first floor through the main duct 3a and the rooms 200c and 200d on the second floor through the main duct 3b. ing.

Further, the indoor air enters the machine room 200e from each room through a corridor or the like, and is exhausted to the outside of the building through an exhaust duct 8a by a ventilation device 6 having a fan or the like. For example, in the case of air in rooms 100a and 100b, the air enters the corridor 100f on the first floor through the ventilation holes provided in the lower part of the rooms 100a and 100b, and goes through the stairs 100g to the corridor 200h on the second floor. It enters the machine room 200e through a ventilation hole between the 200h and the machine room 200e. Further, the ventilation device 6 also has a function of taking in outside air through the intake duct 8b, and the taken in outside air is sent to the indoor unit 11.

The blower fan 40 takes in the air of the room 200d from, for example, the intake port 60 provided on the ceiling of the room 200d, and blows the air to the humidifier 20 through the blower duct 50. The humidifier 20 creates air humidified by a known method such as a vaporization method using the air sent from the blower fan 40 (hereinafter, referred to as humidified air), and sends the humidified air to the subduct 30. The humidified air sent out by the humidifier 20 joins the main ducts 3a and 3b from the sub-duct 30, and is blown out into each room from the outlets 7a to 7d together with the conditioned air flowing through the main ducts 3a and 3b. The humidifier 20 and the blower fan 40 are installed in the space behind the ceiling like the branch chambers 4a and 4b.
The above-mentioned operation of the entire building air conditioning system is controlled by a controller described later that comprehensively controls the entire building air conditioning system.

Generally, the attic where the humidifier is installed is a concealed space outside the room, and it tends to be hot and humid especially in summer. In such a situation, when the air conditioner is operated in the cooling mode and the humidifier and the blower fan are stopped, in the conventional whole building air conditioning system, the air conditioning air (cold air) sent from the air conditioner flows back from the main duct into the sub duct. However, cold air may flow into the humidifier. When the humidifier is cooled by cold air, the temperature of the air around the humidifier decreases, the amount of saturated water vapor decreases, and the humidifier may condense. Therefore, the controller according to the first embodiment suppresses the occurrence of dew condensation on the humidifier due to such backflow of cold air. Hereinafter, a specific flow of control by the controller will be described.

FIG. 2 is a diagram schematically showing the configuration around the humidifier 20 in the entire building air conditioning system including the controller according to the first embodiment. Here, a case where the controller 70 is mounted on the air conditioner 1 will be described as an example. However, the controller does not necessarily have to be mounted on the air conditioner 1, and may be arranged separately from the air conditioner 1.

The humidifier 20 is connected to the main ducts 3a and 3b via the sub duct 30, and is connected to the blower fan 40 via the blower duct 50. The sub-duct 30 includes flexible ducts 32a and 32b and a Y-branch duct 34. One end of the flexible duct 32a is connected to the T branch duct 3a-1 provided in the main duct 3a, and the other end is connected to the connection port 34a of the Y branch duct 34. Similarly, one end of the flexible duct 32b is connected to the T branch duct 3b-1 provided in the main duct 3b, and the other end is connected to the connection port 34b of the Y branch duct 34. The connection port 34c of the Y branch duct 34 is connected to the humidified air outlet 22 of the humidifier 20.

One end of the blower duct 50 is connected to the blower fan 40, and the other end is connected to the air intake port 24 of the humidifier 20.

Air volume adjusting dampers 80a and 80b for adjusting the air volume of the conditioned air or humidified air blown out to each room are provided at the ends of the main ducts 3a and 3b on the branch chambers 4a and 4b sides. The air volume adjusting dampers 80a and 80b are connected to the controller 70. When, for example, the user performs an operation of changing the set temperature or the air volume of each room, the controller 70 changes the opening / closing status of the air volume adjusting dampers 80a and 80b according to the operation.

The controller 70 is also connected to the humidifier 20 to acquire information on the temperature and humidity around the humidifier 20. The controller 70 also acquires information and the like regarding the operation mode of the air conditioner 1. The controller 70 uses the information acquired in this way and the information regarding the opening / closing status of the air volume adjusting dampers 80a and 80b to determine whether or not the humidifier 20 satisfies the condition for dew condensation. Further, the controller 70 is also connected to the blower fan 40, and activates the blower fan 40 when it is determined that the humidifier 20 satisfies the condition for dew condensation. Here, the humidifier 20 and the blower fan 40 operate independently of each other.

As shown in FIG. 2, each duct is configured so that the diameters of the main ducts 3a and 3b are larger than the diameters of the sub duct 30 and the air duct 50. As an example, for example, the main ducts 3a and 3b have a diameter of 250 mm, and the sub duct 30 and the ventilation duct 50 have a diameter of 150 mm.

Next, a configuration example of the controller 70 according to the first embodiment will be described with reference to FIG. The controller 70 includes an acquisition unit 72, a determination unit 74, and a control unit 76.

The acquisition unit 72 acquires information on the open / closed status of the air volume adjusting dampers 80a and 80b provided at the ends of the main ducts 3a and 3b on the branch chambers 4a and 4b sides. The information regarding the opening / closing status of the air volume adjusting dampers 80a and 80b is, for example, the opening degree of each of the dampers 80a and 80b.

Further, the acquisition unit 72 acquires information on the operation mode of the air conditioner 1, information on the air volume of the conditioned air sent by the air conditioner 1, and information on the temperature and humidity around the humidifier 20. Information on the operation mode of the air conditioner 1 is, for example, cooling operation, heating operation, and the like. Information on the air volume of the conditioned air sent by the air conditioner 1 and the temperature and humidity around the humidifier 20 is detected by various sensors (not shown) provided in the air conditioner 1 or the humidifier 20 in advance.

The determination unit 74 determines whether or not the condition for the humidifier 20 to condense dew is satisfied by using each information acquired by the acquisition unit 72. The determination unit 74 uses data on the past opening degrees of the air volume adjusting dampers 80a and 80b, the air volume of the air conditioner 1, the operation mode, the temperature and humidity around the humidifier 20, and these data obtained by experiments. Therefore, the conditions under which the humidifier 20 condenses are learned in advance by machine learning such as AI (Artificial Intelligence).

The control unit 76 activates the blower fan 40 when the determination unit 74 determines that the humidifier 20 satisfies the condition for dew condensation.

In addition, the controller 70 includes a CPU (Central Processing Unit), a communication unit that communicates with an external device, a storage unit such as a memory, and the like. In the controller 70, each function of the acquisition unit 72, the determination unit 74, and the control unit 76 is realized by the CPU executing a predetermined program stored in the memory in advance.

Next, the flow of control by the controller 70 according to the first embodiment will be described with reference to the flowchart of FIG. 4 with specific examples. Here, as a condition in which the humidifier 20 is particularly prone to dew condensation, a case where the air conditioner 1 is operated in the cooling mode and the humidifier 20 and the blower fan 40 are stopped will be described as an example.

When the air conditioner 1 is operated in the cooling mode, the cold air sent from the air conditioner 1 flows through the main ducts 3a and 3b in the direction of the white arrow in FIG. 2, and blows through the branch chambers 4a and 4b and the branch ducts 5a to 5d. It is supplied to each of the rooms 100a, 100b, 200c, and 200d from the exits 7a to 7d. When the temperature of each room is lowered, for example, the user performs an operation of lowering the air volume, and in response to this operation, the air volume adjusting dampers 80a and 80b provided at the ends of the main ducts 3a and 3b on the branch chambers 4a and 4b sides are provided. Works in the closing direction. Then, cold air stays in the main ducts 3a and 3b, and the pressure in the main ducts 3a and 3b gradually increases.

When the pressure in the main ducts 3a and 3b becomes larger than the pressure in the sub ducts 30, the cold air staying in the main ducts 3a and 3b is discharged from the T branch ducts 3a-1 and 3b as shown by the dotted arrows in FIG. It flows back from 3a-2 into the sub-ducts 30 (flexible ducts 32a and 32b) and flows in the direction of the humidifier 20. Then, the humidifier 20 is cooled by cold air, the temperature of the air around the humidifier 20 is lowered, the saturated water vapor amount of the air is lowered, and the humidifier 20 is likely to condense dew.

Here, first, the control unit 76 confirms whether or not the humidifier 20 and the blower fan 40 are stopped (step ST1).

Here, it is confirmed by the control unit 76 that the humidifier 20 and the blower fan 40 are stopped (YES in step ST1). Then, the acquisition unit 72 acquires information (for example, opening degree) regarding the opening / closing status of the air volume adjusting dampers 80a and 80b provided at the ends of the main ducts 3a and 3b on the branch chambers 4a and 4b sides (step ST2).

Next, the acquisition unit 72 acquires information on the operation mode of the air conditioner 1, information on the air volume of the conditioned air sent by the air conditioner 1, and information on the temperature and humidity around the humidifier 20 (step ST3).

Next, the determination unit 74 determines whether or not the condition for the humidifier 20 to condense dew is satisfied by using various information acquired by the acquisition unit 72 (step ST4). In the humidifier 20, for example, the smaller the opening degree of the air volume adjusting dampers 80a and 80b, the larger the air volume of the cold air flowing back from the main ducts 3a and 3b into the sub duct 30, so that it becomes easier to satisfy the condition that dew condensation occurs. Further, in the humidifier 20, the operation mode of the air conditioner 1 is cooling operation, and the larger the air volume of the air conditioning air (cold air) sent out by the air conditioner 1, the more the cold air flowing back from the main ducts 3a and 3b into the sub duct 30. Since the air volume increases, it becomes easier to meet the conditions for dew condensation. Further, the humidifier 20 is more likely to satisfy the condition that dew condensation occurs as the ambient temperature and humidity are higher.

When the determination unit 74 determines that the humidifier 20 satisfies the condition for dew condensation (YES in step ST4), the control unit 76 activates the blower fan 40 (step ST5). The activated blower fan 40 takes in the air of the room 200d from the intake port 60 and blows the air to the humidifier 20 through the blower duct 50 as shown by the solid line arrow in FIG. Then, the cold air that has flowed back into the sub-duct 30 due to the air blown from the blower fan 40 is pushed back toward the main ducts 3a and 3b again, and the inflow into the humidifier 20 is suppressed. As a result, the occurrence of dew condensation in the humidifier 20 is suppressed.

On the other hand, when the determination unit 74 determines that the humidifier 20 does not satisfy the condition for dew condensation (NO in step ST4), the control unit 76 does nothing and the controller 70 ends the process.

Further, when it is confirmed by the control unit 76 in step ST1 that the humidifier 20 and the blower fan 40 are not stopped, that is, at least one of them is operating (NO in step ST1), the cold air is the humidifier 20. It is considered unlikely that the humidifier 20 will flow into the inside, and that the humidifier 20 is unlikely to satisfy the condition of dew condensation. Therefore, the controller 70 ends the process as it is.

In this way, the controller 70 activates the blower fan 40 when the determination unit 74 determines that the condition for the humidifier 20 to condense dew is satisfied. As a result, the cold air that has flowed back into the sub-duct 30 due to the air blown from the blower fan 40 is pushed back toward the main ducts 3a and 3b again, and the inflow into the humidifier 20 is suppressed. In this way, the controller 70 can suppress the occurrence of dew condensation in the humidifier 20.

The opening / closing status of the air volume adjusting dampers 80a and 80b greatly affects the air volume of the cold air flowing back from the main ducts 3a and 3b into the sub duct 30, and thus greatly affects whether or not the humidifier 20 satisfies the condition for dew condensation. .. Therefore, the acquisition unit 72 acquires at least information on the opening / closing status of the air volume adjusting dampers 80a and 80b, and the determination unit 74 uses the acquired information to determine whether or not the condition for dew condensation on the humidifier 20 is satisfied. It is desirable to do.

On the other hand, in the first embodiment, in step ST3 of FIG. 4, the acquisition unit 72 provides information on the operation mode of the air conditioner 1, information on the air volume of the conditioned air sent by the air conditioner 1, and the temperature around the humidifier 20. Although the information regarding the humidity has been acquired, the acquisition unit 72 does not necessarily have to acquire all the information, and may acquire at least one of these information. Further, in that case, the determination unit 74 has at least one of the information regarding the opening / closing status of the air volume adjusting dampers 80a and 80b acquired by the acquisition unit 72 in step ST2 and the above information acquired by the acquisition unit 72 in step ST3. Based on the information, it may be determined whether or not the condition for the humidifier 20 to condense dew is satisfied.

Further, if the acquisition unit 72 has acquired information on the open / closed status of the air volume adjusting dampers 80a and 80b in step ST2, step ST3 (information on the operation mode of the air conditioner 1 and the conditioned air sent by the air conditioner 1). (Acquisition of information on air volume and information on temperature and humidity around the humidifier 20) may be omitted.

Further, when the determination unit 74 determines that the condition for the humidifier 20 to condense dew is satisfied, the determination unit 74 blows air from the blower fan 40, which is the minimum necessary for suppressing the dew condensation of the humidifier 20, based on the information used for the determination. The air volume may be calculated, and the control unit 76 may control the operation of the blower fan 40 so that the blower amount is sent to the humidifier 20. As a result, the controller 70 can suppress energy loss due to the blower fan 40 blowing an excessive amount of air.

As described above, according to the first embodiment, the controller 70 acquires information on the opening / closing status of the air volume adjusting dampers 80a and 80b provided at the ends of one or more main ducts 3a and 3b. Based on the information regarding the opening / closing status of the air volume adjusting dampers 80a and 80b acquired by the acquisition unit 72, the humidifier 20 is determined by the determination unit 74 and the determination unit 74 to determine whether or not the condition for dew condensation is satisfied. It is provided with a control unit 76 that activates the blower fan 40 when it is determined that the condition for dew condensation is satisfied. As a result, the controller can suppress the occurrence of dew condensation due to the cold air flowing back in the subduct 30 flowing into the humidifier 20 and cooling the humidifier 20. In particular, since the humidifier 20 is installed in a concealed high-temperature and high-humidity environment such as the ceiling, dew condensation is likely to occur, but the controller 70 also causes dew condensation in the humidifier 20 even in such a situation. Can be suppressed.

Further, since the controller 70 activates the blower fan 40 when it is determined that the humidifier 20 satisfies the condition for dew condensation, energy loss due to the constant operation of the blower fan 40 can be suppressed.

Further, the determination unit 74 provides information on at least one of the air volume of the air conditioner 1, the operation mode of the air conditioner 1, the temperature and humidity around the humidifier 20, and information on the opening / closing status of the air volume adjusting dampers 80a and 80b. Based on this, it is determined whether or not the humidifier 20 satisfies the condition for dew condensation. As a result, the controller 70 can determine with higher accuracy whether or not the condition for the humidifier 20 to condense dew is satisfied.

Further, the determination unit 74 provides information on at least one of the air volume of the air conditioner 1, the operation mode of the air conditioner 1, and the temperature and humidity around the humidifier 20, and information on the opening / closing status of the air volume adjusting dampers 80a and 80b. As training data, the conditions under which the humidifier 20 condenses are learned by machine learning. As a result, the controller 70 can determine whether or not the humidifier 20 satisfies the condition for dew condensation with higher accuracy and with high reliability and reproducibility.

In the first embodiment, an example in which the air volume adjusting dampers 80a and 80b are provided at the ends of the main ducts 3a and 3b on the branch chambers 4a and 4b side has been described, but the air volume adjusting dampers 80a and 80b are the branch ducts 5a. It may be provided at the end of the outlets 7a to 7d of ~ 5d, or may be provided at both of them. In that case, the acquisition unit 72 may appropriately acquire information on the opening / closing status of the air volume adjusting dampers 80a and 80b provided at each location.

Further, in the first embodiment, the case where the humidity control device is the humidifier 20 has been described as an example, but the humidity control device may be a dehumidifier. Further, in the first embodiment, the case where two main ducts (3a, 3b) are provided has been described as an example, but the number of main ducts may be, for example, one or three or more. Further, the controller 70 may repeatedly execute the process based on the flowchart shown in FIG. 4 at an arbitrary interval (for example, every 5 minutes).

In the present invention, within the scope of the invention, it is possible to modify any component of the embodiment or omit any component in the embodiment.

1 Air conditioner 2 Supply chambers 3a, 3b Main ducts 4a, 4b Branch chambers 5a to 5d Branch ducts 6 Ventilation devices 7a to 7d Outlet 8a Exhaust duct 8b Intake duct 11 Indoor unit 12 Outdoor unit 20 Humidifier (humidifier)
30 Subduct 40 Blower fan 50 Blower duct 60 Intake port 70 Controller 72 Acquisition unit 74 Judgment unit 76 Control unit 80a, 80b Damper (air volume adjustment damper)
100a, 100b Room 100f Corridor 100g Stairs 200c, 200d Room 200e Machine room 200h Corridor

Claims (5)

A controller that controls a humidity control device connected to one or more main ducts via a subduct and a blower fan connected to the humidity control device via a blower duct.
An acquisition unit for acquiring information on the open / closed status of a damper provided at the end of the main duct, and an acquisition unit.
Based on the information on the open / closed state of the damper acquired by the acquisition unit, a determination unit for determining whether or not the humidity control device satisfies the condition for dew condensation, and a determination unit.
A control unit that activates the blower fan when the determination unit determines that the humidity control device satisfies the condition for dew condensation.
A controller characterized by being equipped with. The determination unit has information on at least one of the air volume of the air conditioner that sends conditioned air to the main duct, the operation mode of the air conditioner, and the temperature and humidity around the humidity control device, and information on the open / closed state of the damper. The controller according to claim 1, wherein the humidity control device determines whether or not the condition for dew condensation is satisfied based on the above. The determination unit uses at least one information of the air volume of the air conditioner, the operation mode of the air conditioner, and the temperature and humidity around the humidity control device, and information on the open / closed state of the damper as learning data, and is a machine. The controller according to claim 2, wherein the humidity control device learns the conditions for dew condensation by learning. A method for suppressing dew condensation on the humidity control device by a controller that controls a humidity control device connected to one or more main ducts via a sub duct and a blower fan connected to the humidity control device via a blower duct. There,
A step in which the acquisition unit acquires information regarding the opening / closing status of the damper provided at the end of the main duct.
A step in which the determination unit determines whether or not the condition for dew condensation is satisfied by the humidity control device based on the information regarding the opening / closing status of the damper acquired by the acquisition unit.
A step of starting the blower fan when the control unit determines that the determination unit satisfies the condition for dew condensation on the humidity control device.
A method for suppressing dew condensation, which comprises having. Steps to obtain information on the open / closed status of dampers provided at the ends of one or more main ducts,
Based on the acquired information on the opening / closing status of the damper, a step of determining whether or not the condition for dew condensation is satisfied by the humidity control device connected to the main duct via the sub-duct, and
A step of starting the blower fan when the determination unit determines that the humidity control device satisfies the condition for dew condensation.
A program characterized by having a computer execute.

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