JP7333685B2 - Control device, air conditioning system and control method - Google Patents

Description

The present invention relates to a control device, an air conditioning system and a control method.

In Patent Document 1, conditioned air whose temperature is controlled by an air conditioner is sent to a panel board arranged on the floor surface, the panel board is cooled or heated, and cold air or warm air from the panel board is radiated into the room. A floor radiant heating and cooling system is disclosed. In this floor radiant cooling and heating system, conditioned air that has passed through the panel board is blown into the room from the grill at the end of the panel board. As a result, the room can be cooled and heated not only by heat radiation from the panel board but also by conditioned air. Further, Patent Literature 1 describes that the conditioned air blown into the room is again sucked into the air conditioner and reused.

Patent Literature 2 discloses a temperature control unit that supplies hot water to a floor heating panel to heat an indoor floor. This temperature control unit is equipped with a ventilation device that dehumidifies or humidifies indoor air. For example, in the case of dehumidifying operation, air taken in from the outside is cooled by a heat exchanger provided in the ventilation device to remove moisture, and the dehumidified air is supplied indoors.

JP-A-2004-232989 JP 2014-119204 A

When the floor radiant cooling and heating system described in Patent Document 1 performs cooling operation, dew condensation may occur on the surface of the panel board. Japanese Patent Laid-Open No. 2002-200003 does not describe any means for solving the problem of dew condensation prevention. Since the dehumidifying operation described in Patent Document 2 dehumidifies the outdoor air and supplies it indoors, the control is applied to the floor radiant cooling and heating system described in Patent Document 1 that circulates and reuses the conditioned air. you can't.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a control device, an air conditioning system, and a control method that can solve the above-described problems.

According to one aspect of the present invention, the control device includes an air conditioner that takes in air in a space to be air-conditioned and controls the temperature of the air, and a radiant panel module that is arranged on a surface that contacts the space. , an air conditioning system comprising: a fan for sending the air whose temperature is controlled by the air conditioner to the radiant panel module; and an outlet for blowing the air that has passed through the radiant panel module to the space, wherein humidity and condensation are A setting table that defines the relationship between the operation times of the fan for prevention is stored, and the operation that lowers the air volume of the fan below a predetermined value at the start of the cooling operation is performed to reduce the air volume of the space at the start of the cooling operation. The operation is performed for an operating time corresponding to the humidity based on the humidity and the setting table.

According to one aspect of the present invention, when the first humidity is higher than the second humidity in the space at the start of the cooling operation, the control device reduces the air volume of the fan to the second humidity. It runs longer for the first humidity than for the second humidity.

According to one aspect of the present invention, the control device reduces the air volume to a first air volume while the relative humidity of the space is higher than a third humidity in the control for reducing the air volume of the fan, and the relative humidity decreases to the third humidity, the air volume is increased to a second air volume that is greater than the first air volume.

According to one aspect of the present invention, the control device performs control to reduce the air volume of the fan only when the relative humidity of the space is equal to or higher than a predetermined value at the start of the cooling operation.

According to one aspect of the present invention, the control device executes the control to reduce the air volume of the fan when the relative humidity of the space reaches or exceeds a predetermined value during execution of the cooling operation.

According to one aspect of the present invention, the radiant panel module includes a heat exchange channel that exchanges heat with the space, a bypass channel that bypasses the heat exchange channel, and the air channel. and a damper that switches between the heat exchange flow path and the bypass flow path, wherein the control device controls the air flow to pass through the bypass flow path while performing control to reduce the air volume of the fan. to control the damper.

According to one aspect of the present invention, an air-conditioning system includes an air conditioner that takes in air in a space to be air-conditioned and controls the temperature of the air, and a radiant panel module that is arranged on a surface in contact with the space. , a fan for sending the air whose temperature is controlled by the air conditioner to the radiant panel module, an outlet for blowing the air that has passed through the radiant panel module to the space, and the control device according to any one of the above. And prepare.

According to one aspect of the present invention, a control method includes an air conditioner that takes in air in a space to be air-conditioned and controls the temperature of the air, and a radiant panel module that is arranged on a surface in contact with the space. a fan for sending the air whose temperature is controlled by the air conditioner to the radiation panel module; an outlet for blowing the air that has passed through the radiation panel module to the space; and the fan for preventing humidity and condensation . and a setting table that defines the relationship between the operation time of the air conditioning system, wherein the operation of reducing the air volume of the fan below a predetermined value at the start of the cooling operation is the humidity of the space at the start of the cooling operation. It is executed only for the operating time corresponding to the humidity based on the setting table.

Advantageous Effects of Invention According to the present invention, it is possible to prevent dew condensation during cooling operation in an air conditioning system that combines radiation and convection.

It is a schematic diagram showing an example of an air-conditioning system in one embodiment of the present invention. FIG. 2 is a diagram showing a radiating panel and an example of its arrangement in one embodiment of the present invention; It is a figure showing an example of a refrigerant circuit in one embodiment of the present invention. It is a block diagram showing an example of a control device in one embodiment of the present invention. FIG. 4 is a diagram illustrating dew condensation prevention operation in one embodiment of the present invention; 4 is a flow chart of dew condensation prevention operation in one embodiment of the present invention. FIG. 5 is a diagram illustrating another example of dew condensation prevention operation in one embodiment of the present invention; FIG. 4 is a diagram showing a connection example of radiation panels in one embodiment of the present invention;

<Embodiment>
The air conditioning system of this embodiment will be described below with reference to the drawings.
FIG. 1 is a schematic diagram showing an example of an air conditioning system in one embodiment of the present invention.
The air conditioning system 100 includes an indoor unit 10, an outdoor unit 20, radiant panel modules 40A and 40B, and a duct 13. Hereinafter, the radiant panel modules 40A, 40B, etc. may be collectively referred to as the radiant panel module 40. FIG.
The indoor unit 10 is installed in the ceiling of the indoor space W0 to be air-conditioned, etc., sucks the air W in the space W0 from the suction port W1, adjusts the temperature of the air W to an appropriate temperature, and sends it to the duct 13. . At least one radiant panel module 40 is arranged on the floor, wall surface, ceiling, etc. of the space W0, and the temperature-controlled air delivered to the duct 13 is supplied to the radiant panel module 40. FIG. The radiant panel module 40 includes a radiant panel that radiates radiant heat to the space W0 and an air passage through which the air W supplied from the indoor unit 10 passes. The radiation panel is arranged on the surface of the floor, wall, ceiling, etc. so as to be in contact with the space W0 so that the radiation surface (radiation panel) faces the space W0 side, and the temperature-controlled air W passing through the back surface of the radiation panel is Cooling or heating the radiant panel. By cooling or heating the radiant panel, radiant heat is transferred to the space W0 via the radiant panel to cool or heat the space W0. The radiant panel module 40A and the radiant panel module 40B are connected by piping or the like, and the air W passing through the radiant panel module 40A is supplied to the radiant panel module 40B. Air W supplied from the indoor unit 10 passes through the radiant panel module 40A and the radiant panel module 40B, is blown out from the outlet W2A into the space W0, and cools or heats the space W0. In this manner, the air conditioning system 100 performs air conditioning by two methods, radiant and convective, to cool and heat the space W0.

Next, an example of the configuration and arrangement of the radiation panel module 40 will be described.
FIG. 2 is a diagram showing a radiant panel module and its arrangement example in one embodiment of the present invention. FIG. 2 shows a plan view of the radiant panel module 40. As shown in FIG. In the example shown in FIG. 2, four radiant panel modules 40A, 40B, 40C and 40D are arranged on the floor of the space W0. The configuration of the radiation panel module 40 will be described by taking the radiation panel module 40A as an example. The radiation panel module 40A includes a damper 42A, flow path forming members 41A1, 41A2, 41A3, 41A4, 41A5, 41A6, a damper control section 43A, an inlet section 44A, and an outlet section 45A. The upper surface of the radiation panel module 40A (floor surface of the space W0) is formed of a radiation panel (not shown). The damper control section 43A controls the opening/closing operation of the damper 42A based on instructions from the control device 30 . When the damper 42A is at the position indicated by the solid line (opened state), the air W that has flowed in from the inlet 44A passes through the bypass flow path 46A in the direction indicated by the solid arrow and is sent out from the outlet 45A. On the other hand, when the damper 42A is in the position indicated by the dashed line (closed state) under the control of the damper control section 43A, the air W flowing in from the inlet 44A is directed in the direction indicated by the dashed arrow to the heat exchange passages 47A1, 47A2, It passes through 47A3, 47A4, 47A5, 47A6 and 47A7 and is sent out from the outlet 45A.

When the air W passes through the heat exchange channel 47A1 and the like, the radiant heat from the radiant panel module 40A increases, and the floor (radiant panel) becomes warm during heating. On the contrary, when the air W passes through the bypass flow path 46A, the temperature rise of the floor in the area where the radiant panel module 40A is arranged is suppressed, and the warm air W is used for convective air conditioning. For example, when the user spends time in the area where the radiation panel module 40A is arranged, the remote controller or the like gives an instruction to switch the damper 42A of the radiation panel module 40A so that the air W passes through the heat exchange channel 47A1 or the like. can be controlled. Alternatively, when the user spends time in the area where the radiant panel module 40A is arranged during cooling operation, the remote controller instructs to switch the damper 42A to prevent the feet from getting cold, and the air W passes through the bypass flow path 46A. can be controlled to The radiant panel modules 40B-40D are similarly constructed.

As shown, the radiant panel module 40A and the radiant panel module 40B are connected by a pipe 50A. Similarly, the radiation panel module 40C and the radiation panel module 40D are connected by a pipe 50C. The duct 13 is branched into two and connected to the inlets 44A and 44C. Temperature-controlled air W is supplied from the indoor unit 10 through the duct 13 to the inlet 44A of the radiant panel module 40A and the inlet 44C of the radiant panel module 40C. The air W supplied to the radiant panel module 40A passes through the bypass channel 46A, the heat exchange channel 47A1, or the like, and is supplied from the outlet 45A to the inlet 44B of the radiant panel module 40B via the pipe 50A. Similarly, the air W supplied to the radiant panel module 40C passes through the inside of the radiant panel module 40C and is supplied from the outlet 45C to the inlet 44D of the radiant panel module 40D via the pipe 50C. The same applies to the radiant panel modules 40B and 40D. The air sent out from the outlets 45B, 45D by the radiation panel modules 40B, 40D is blown out from the outlets W2A to W2D into the space W0.

The dampers 42A and the like of the radiant panel modules 40A to 40D can be independently controlled. For the radiant panel modules 40B-40D, the dampers 42B-42D can be controlled to open, respectively.

The air W blown out from the outlets W2A to W2D into the space W0 cools or heats the space W0 and is sucked into the indoor unit 10 again from the inlet W1. As illustrated in FIGS. 1 and 2, the ceiling inlet W1 and the outlets W2A-W2D can be provided at separate positions, and a plurality of radiant panel modules 40 can be arranged side by side between them. For example, if the inlet W1 and the outlet W2A and the like are provided at positions near both ends of the room to be air-conditioned, the entire room can be uniformly air-conditioned in convective air-conditioning. Also, by connecting a plurality of radiant panel modules 40 in an arbitrary direction via pipes 50, radiant panels can be arranged in a two-dimensional plane. As a result, the entire room can be air-conditioned even by radiant air-conditioning.

Note that the switching of the damper 42A is not limited to the control of switching between the completely open state and the closed state. For example, a stepping motor may be used to perform control to switch between the open state and the closed state in multiple stages. As a result, the flow rate of the air W flowing into the heat exchange flow path 47A1 and the like and the flow rate of the air W flowing into the bypass flow path 46A can be adjusted, and finer temperature control can be performed. For example, when it is felt that the temperature of the floor is high during heating, the damper control section 43A may control the position of the damper 42A to an intermediate position between the open state and the closed state according to the user's instruction. As a result, a smaller amount of air W flows into the heat exchange passages 47A1 and the like than when controlled to the closed state, so that the temperature rise of the floor can be suppressed.

The air W sucked from the suction port W1 exchanges heat with the indoor heat exchanger 2 provided in the indoor unit 10, is controlled to an appropriate temperature, and is sent out to the duct 13 again by the fan 9. The indoor unit 10 includes an indoor heat exchanger 2 , a fan 9 , a temperature sensor 11 , a humidity sensor 12 and a controller 30 . The temperature sensor 11 measures the temperature of the air W sucked from the suction port W1. The humidity sensor 12 measures the humidity (relative humidity) of the air W sucked from the suction port W1. Control device 30 controls the number of revolutions of fan 9 based on the measured values of temperature sensor 11 and humidity sensor 12 to send air W to duct 13 . The indoor unit 10 is connected to the outdoor unit 20 by a refrigerant pipe 6, a communication line (not shown), and the like. The indoor unit 10 and the outdoor unit 20 constitute a refrigerating cycle, which heats and cools the refrigerant by circulating the refrigerant in the refrigerating cycle, and controls the air W to a desired temperature through the indoor heat exchanger 2. .

Here, the operation of the refrigeration cycle by the indoor unit 10 and the outdoor unit 20 will be described using FIG. FIG. 3 is a diagram showing an example of a refrigerant circuit in one embodiment of the present invention.
As shown in FIG. 3 , the indoor unit 10 has an indoor heat exchanger 2 and a fan 9 . The outdoor unit 20 includes a compressor 1 , an expansion valve 3 , an outdoor heat exchanger 4 and a four-way valve 5 . Compressor 1 , indoor heat exchanger 2 , expansion valve 3 , outdoor heat exchanger 4 , and four-way valve 5 are connected by refrigerant pipes 6 .
The compressor 1 compresses a refrigerant and discharges the compressed high-temperature, high-pressure refrigerant. In heating operation, the refrigerant circulates in the direction of arrow 8 . That is, the refrigerant discharged from the compressor 1 is supplied to the indoor heat exchanger 2 via the four-way valve 5 . In the indoor heat exchanger 2, the refrigerant radiates heat to the air W sucked from the suction port W1, condenses, and liquefies. The condensed refrigerant is decompressed by the expansion valve 3 to become a low-pressure refrigerant. The low-pressure refrigerant is supplied to the outdoor heat exchanger 4 and vaporized by absorbing heat from the outside air. The vaporized refrigerant passes through the four-way valve 5 and is sucked into the compressor 1 . The compressor 1 compresses low-pressure refrigerant and discharges high-pressure refrigerant.

In cooling operation, the refrigerant circulates in the direction of arrow 7 . That is, the high-pressure refrigerant discharged from the compressor 1 is supplied to the outdoor heat exchanger 4 via the four-way valve 5, where it is radiated to the outside air and condensed. The condensed refrigerant is decompressed by the expansion valve 3 . The low-pressure refrigerant is supplied to the indoor heat exchanger 2, absorbs heat from the air W, cools the air W, and evaporates. The vaporized refrigerant passes through the four-way valve 5 and is sucked into the compressor 1 . The compressor 1 compresses low-pressure refrigerant and discharges high-pressure refrigerant.

The controller 21 of the outdoor unit 20 switches the four-way valve 5 according to heating and cooling, and drives the compressor 1 at a rotation speed according to the difference between the temperature of the air W measured by the temperature sensor 11 and the set temperature. Thus, the refrigerating cycle is operated so that the temperature of the space W0 reaches the set temperature set by the user. The air W and the refrigerant exchange heat in the indoor heat exchanger 2 . The control device 30 controls the fan 9 at a predetermined number of revolutions to send the air W after heat exchange controlled to a desired temperature to the duct 13 . Further, for example, the control device 30 reduces the rotation speed of the fan 9 based on the humidity of the air W measured by the humidity sensor 12 to suppress the air volume, thereby reducing the humidity of the space W0 and preventing dew condensation. Perform anti-condensation operation. Next, the dew condensation prevention operation provided in the control device 30 will be described.

FIG. 4 is a block diagram showing an example of a control device in one embodiment of the present invention.
The control device 30 is, for example, a computer device such as a microcomputer. As illustrated, the control device 30 includes a sensor information acquisition section 31 , a setting information acquisition section 32 , a timer 33 , a storage section 34 , a control section 35 and a communication section 36 . Although the control device 30 performs various controls regarding the indoor unit 10, this specification will focus on the functions related to the dew condensation prevention operation.

The sensor information acquisition unit 31 acquires the measured value of the temperature of the air W from the temperature sensor 11 and the measured value of the humidity of the air W from the humidity sensor 12 .
The setting information acquisition unit 32 acquires various setting information input by the user from a remote controller or the like. For example, the setting information acquisition unit 32 can receive instructions to start and stop operation, cooling/heating settings, room temperature settings, air volume settings, which area of the floor (any of the radiant panel modules 40A to 40D) to heat ( or cooling), or setting information such as which area is not to be heated (or not to be cooled).
The timer 33 measures time.
The storage unit 34 stores various information such as measured values of temperature and humidity acquired by the sensor information acquisition unit 31 and various setting information acquired by the setting information acquisition unit 32 . The storage unit 34 also stores various programs that implement the functions of the control device 30 .

The control unit 35 controls the indoor unit 10 and controls the air conditioning system 100 in cooperation with the outdoor unit 20 . For example, when the setting information acquisition unit 32 acquires a cooling operation start instruction and a set temperature during cooling, it notifies the control device 21 of the outdoor unit 20 of the setting information together with the measured value of the temperature sensor 11 . The controller 21 drives the compressor 1 based on the difference between the measured value of the temperature sensor 11 and the set temperature, and operates the refrigeration cycle so that the air W reaches a desired temperature. Further, for example, when the setting information acquisition unit 32 acquires the setting information of the predetermined air volume, the control unit 35 determines the volume of the air W supplied to the duct 13 (or the volume of the air W blown out from the outlet W2A or the like). ) controls the number of rotations of the fan 9 so that the air volume becomes a predetermined amount. For example, if the air volume can be set in three stages of strong, medium, and weak, the rotation speed of the fan 9 is determined for each of these settings, and the control unit 35 determines the rotation speed corresponding to the air volume setting set by the user. to drive the fan 9. Further, for example, when the user sets the area of the radiant panel module 40A not to cool too much during cooling, the control unit 35 instructs the damper control unit 43A to open the damper 42A.

The control unit 35 reduces the number of revolutions of the fan 9 or switches the damper 42A or the like to prevent dew condensation on the radiation panel of the radiation panel module 40 during cooling. For example, when the air conditioning system 100 performs cooling operation, there is a possibility that the amount of water vapor contained in the air present in the space W0 is large for a while after the operation is started. If the radiant panel module is cooled in that state, condensation may form on the surface of the radiant panel. Therefore, in the present embodiment, dew condensation prevention operation is performed at the start of cooling operation.

(Condensation prevention operation)
For example, the control unit 35 (1) performs a dehumidifying operation at the start of the cooling operation. Specifically, in the control of the refrigeration cycle such as the control of the compressor 1, only the number of revolutions of the fan 9 is decreased while the cooling operation based on the setting conditions specified by the user is being performed. When the number of rotations of the fan 9 is lowered, the air volume per unit time of the air W passing through the indoor heat exchanger 2 is reduced. Therefore, the air W is cooled to a lower temperature by heat exchange with the indoor heat exchanger 2 . By cooling the air W, the moisture in the air W is removed, and the humidity of the air W after heat exchange is lower than when the rotation speed of the fan 9 is high. For example, if it is possible to control the rotation speed of the fan 9 so that the temperature of the air W cooled by the indoor heat exchanger 2 is lower than the dew point temperature calculated from the humidity measured by the humidity sensor 12, The dehumidifying effect of the indoor heat exchanger 2 can be enhanced. The dehumidified air W is returned to the room through the duct 13 and the radiation panel module 40 . As a result, the humidity in the room is also lowered, and dew condensation on the radiation panel is less likely to occur.

In addition, the control unit 35 (2) performs convection air conditioning, not radiant air conditioning, at the start of cooling operation. That is, the damper control unit 43A controls the damper 42A to the open state (solid line position) based on the instruction from the control unit 35 . Then, the air W flows in from the inlet portion 44A, passes through the bypass flow path 46A, and flows out from the outlet portion 45A. This reduces the heat transfer from the cooled air W to the radiant panel while passing through the bypass channel 46A, and the radiant panel is cooled compared to when the air W passes through the heat exchange channel 47A1 or the like. The temperature of the radiant panel is kept relatively high without Therefore, it is less likely that condensation will form on the surface of the radiation panel. The control unit 35 similarly switches the route through which the air W passes for the other radiation panel modules 40B to 40D.

In this way, when the convection air conditioning that circulates the air W in the space W0 while passing through the bypass flow path 46A is continued, the amount of water vapor contained in the air in the space W0 decreases due to the dehumidification effect by the control of (1). Decrease. If the amount of water vapor is small, the possibility of dew condensation on the surface of the radiant panel is reduced even if the radiant panel is cooled and radiant air conditioning is performed. The control unit 35 terminates the dew condensation prevention operation, for example, when it can be determined that the operating environment has a low possibility of dew condensation based on the measured value by the humidity sensor 12 . When the dew condensation prevention operation ends, the control unit 35 and the control device 21 perform normal cooling operation. For example, the control unit 35 drives the fan 9 at a rotation speed corresponding to the air volume designated by the user. Further, for example, the control unit 35 performs opening/closing control of the damper 42A or the like so as to cool only the area designated by the user. Further, the control device 21 adjusts the cooling capacity based on the temperature measured by the temperature sensor 11 and the set temperature.

The communication unit 36 communicates with the control device 21 . For example, when the setting information acquisition unit 32 acquires a shutdown instruction, the communication unit 36 transmits the shutdown instruction to the controller 21 of the outdoor unit 20 . Also, the communication unit 36 communicates with the damper control unit 43A and the like. For example, when the control unit 35 instructs to close the damper 42A, the communication unit 36 transmits the instruction information to the damper control unit 43A.

Next, an example of dew condensation prevention operation of this embodiment will be described with reference to FIG.
FIG. 5 is a diagram for explaining dew condensation prevention operation in one embodiment of the present invention.
FIG. 5(a) shows the time transition of the number of rotations of the fan 9, and FIG. 5(b) shows changes in the opening/closing state of the damper 42A and the like. The vertical axis in FIG. 5(a) indicates the rotation speed of the fan 9, and the vertical axis in FIG. 5(b) indicates whether the damper 42A or the like is open or closed. The horizontal axis of each graph in FIGS. 5(a) and 5(b) indicates time, and the same position in each graph indicates the same time. The solid line graph indicates the control when the humidity at the start of the cooling operation is h1%, and the broken line graph indicates the control when the humidity at the start of the cooling operation is h2%. Here, h1>h2.

Cooling operation is started at time t0. The controller 35 (1) performs a dehumidifying operation in which the air volume of the fan 9 is reduced below a predetermined value while maintaining the cooling capacity. The predetermined value is, for example, the lowest air volume that can be set by the user. Alternatively, the air volume may be even smaller than the minimum user-settable air volume provided for anti-condensation operation. Preferably, the controller 35 performs both (1) the dehumidification operation and (2) the passage of the air W to the bypass channel in all the radiant panel modules 40 . 5A and 5B show that the controller 35 sets the rotation speed of the fan 9 to the low speed R1 and opens the damper 42A via the damper controller 43A. Due to the dehumidifying operation, the increase in the relative humidity of the air W is suppressed (or decreased) despite the decrease in the temperature of the air W. Note that when the rotation speed of the fan 9 corresponding to the air volume specified by the user is R1, the control unit 35 may drive the rotation speed at R1 even during the dew condensation prevention operation, or the lowest rotation speed that the user can specify. A rotation speed R1' that is lower than the number may be provided, and the fan 9 may be driven at the rotation speed R1' during dew condensation prevention operation.

If the relative humidity at the start of the cooling operation is h2%, the controller 35 ends the dew condensation prevention operation at time t1 when a predetermined time T1 has elapsed since the start of the cooling operation. That is, the controller 35 increases the rotation speed of the fan 9 to R2 corresponding to the air volume set by the user. The control unit 35 also instructs the damper control unit 43A of the radiant panel module 40A and the like to switch the damper 42A and the like from the open state to the closed state based on the setting of the area for cooling and heating by the user.
Similarly, if the relative humidity at the start of the cooling operation is h1%, the controller 35 ends the dew condensation prevention operation at time t2 when a predetermined time T2 has elapsed since the start of the cooling operation. The control unit 35 increases the rotational speed of the fan 9 and switches the flow path of the air W in each radiation panel module 40 based on the user's settings.

As shown, time T2>time T1. If the relative humidity at the start of the cooling operation is high, the water vapor in the air must be removed accordingly. conduct. Conversely, if the relative humidity is low at the start of the cooling operation, the time required for dehumidification will be short, so the controller 35 will perform dew condensation prevention operation for a relatively short period of time.
The times T1 and T2 may be predetermined for each relative humidity at the start of cooling operation. Alternatively, times T1 and T2 may be predetermined for each temperature and relative humidity at the start of cooling operation. Alternatively, the times T1 and T2 may be determined in advance for each temperature and relative humidity at the start of the cooling operation and for each set temperature. The times T1 and T2 are recorded in the storage unit 34. FIG.

Alternatively, the control unit 35 monitors the humidity measured by the humidity sensor 12 instead of controlling the stop of the anti-condensation operation based on time, and stops the anti-condensation operation when the relative humidity drops below a predetermined threshold. good.

FIG. 6 is a flow chart of dew condensation prevention processing in cooling operation in one embodiment of the present invention.
The air conditioning system 100 shown in FIGS. 1 and 2 will be described as an example. First, the cooling operation is started according to a user's instruction (step S11). The user's instructions include set temperature, air volume, and set information as to which area (radiant panel modules 40A to 40D) of the floor is to be cooled. Setting information is shared between the indoor unit 10 and the outdoor unit 20 . During execution of the cooling operation, the communication unit 36 transmits the temperature of the air W detected by the temperature sensor 11 acquired by the sensor information acquisition unit 31 to the control device 21 of the outdoor unit 20 at predetermined time intervals. The control device 21 adjusts the rotational speed of the compressor 1 so that the temperature of the air W approaches the set temperature, and operates the refrigeration cycle.
In the indoor unit 10, the controller 35 executes dew condensation prevention operation based on the start of the cooling operation (step S12). For example, the control unit 35 sets the rotation speed to the lowest to drive the fan 9 . Further, the control unit 35 instructs the damper control unit 43A to open the damper 42A. Similarly, the controller 35 instructs the damper controllers 43B to 43D to open the dampers 42B to 42D, respectively. Also, the control unit 35 determines the time for executing the dew condensation prevention operation based on the humidity of the air W measured by the humidity sensor 12 . For example, the storage unit 34 stores a table that defines the relationship between humidity and dew condensation prevention operation execution time (times T1 and T2 in FIG. 5). Determine the execution time of preventive operation. The control unit 35 refers to the time measured by the timer 33, and ends the dew condensation prevention operation when the determined execution time elapses from the start of the dew condensation prevention operation. When the dew condensation prevention operation ends, for example, the controller 35 increases the rotation speed of the fan 9 to the rotation speed corresponding to the air volume specified by the user. Further, the control unit 35 instructs the damper control unit 43A and the like to close the damper 42A so that the area set by the user is cooled. When the dew condensation prevention operation ends, normal cooling operation is performed.

The dew condensation prevention operation may be performed not only at the start of the cooling operation but also during execution of the cooling operation. For example, the control unit 35 determines whether or not the condition for starting the dew condensation prevention operation is satisfied (step S13), and if the condition is satisfied, the dew condensation prevention operation such as reducing the rotation speed of the fan 9 is executed ( step S14). For example, when the humidity measured by the humidity sensor 12 rises above a predetermined threshold value, the controller 35 may determine to execute the dew condensation prevention operation. Alternatively, the control unit 35 may determine to execute the dew condensation prevention operation when the cooling operation continues for a predetermined time or longer. Alternatively, the control unit 35 may determine to execute the dew condensation prevention operation when the set temperature is changed (decreased) by a predetermined temperature or more. When the start condition is satisfied, the control unit 35 performs the dew condensation prevention operation for a predetermined execution time, and then returns to the cooling operation.
Further, if the start condition is not satisfied, the cooling operation is continued (step S15).

Next, the control unit 35 determines whether or not to end the cooling operation (step S16). For example, when the setting information acquisition unit 32 acquires information instructing to stop the cooling operation, the control unit 35 determines to end the cooling operation. If the cooling operation is not to be ended (step S16; No), the processes after step S13 are repeated. When the cooling operation is terminated (step S16; Yes), the control devices 21 and 30 perform cooling operation termination processing (step S16). For example, the controller 21 stops the compressor 1 . Also, the control unit 35 stops the fan 9 .

FIG. 7 is a diagram illustrating another example of dew condensation prevention operation in one embodiment of the present invention.
In FIG. 5, an execution example of dew condensation prevention operation based on humidity at the start of cooling operation has been described. FIG. 7 illustrates an example in which rotation speed control of the fan 9 and opening/closing control of the damper 42A and the like are performed according to the change in humidity after the dew condensation prevention operation.
FIG. 7 shows temporal changes in the relative humidity, the rotational speed of the fan 9, and the open/closed state of the damper 42A and the like. h3 and h4 are relative humidity thresholds used for determination, and h3>h4.
Cooling operation is started at time t0. It is assumed that the humidity at the start of the cooling operation is higher than h3%. Based on the fact that the humidity measured by the humidity sensor 12 is higher than h3%, the controller 35 executes the dew condensation prevention operation A. Specifically, the control unit 35 performs (1) a dehumidifying operation that reduces the rotational speed of the fan 9 to R3, and (2) controls that open the dampers 42A to 42D. Note that R3 is, for example, R1 or R1' illustrated in FIG.

During the dew condensation prevention operation A, the controller 35 monitors the humidity measured by the humidity sensor 12 . As shown in the figure, the humidity in the space WO gradually decreases due to the effect of the dew condensation prevention operation A. When the humidity drops to h3% at time t3, the controller 35 terminates the dew condensation prevention operation A based on the fact that the humidity has dropped to h3%, and executes the dew condensation prevention operation B instead. Specifically, the controller 35 (1) increases the rotational speed of the fan 9 from R3 to R4 and operates at R4. (2) The dampers 42A-42D remain open. Rotational speed R4 is higher than R3 and corresponds to an air volume that does not cause dew condensation. Further, the number of rotations R4 is the number of rotations corresponding to an air volume smaller than the air volume set by the user.

The controller 35 continues to monitor the humidity measured by the humidity sensor 12 . When the humidity drops to h4% at time t4, the controller 35 terminates dew condensation prevention operation B. That is, the control unit 35 increases the rotational speed of the fan 9 to R5, and closes the dampers 42A to 42D. The number of revolutions R5 is, for example, the number of revolutions corresponding to the air volume during the cooling operation set by the user. After completing the dew condensation prevention operation B, the control unit 35 performs the cooling operation.

As in the example of FIG. 7, the control unit 35 may monitor the humidity during the dew condensation prevention operation and increase the rotation speed of the fan 9 according to the decrease in humidity. As a result, a larger amount of cooled air W can be supplied to the space WO, and the cooling capacity can be exhibited even during the anti-condensation operation. Further, by opening the damper 42A and the like while the rotation speed of the fan 9 is being increased, it is possible to suppress the occurrence of dew condensation.
In the example of FIG. 7, the number of rotations of the fan is switched in one stage, but for example, three thresholds of humidity are provided (for example, h31%>h32%>h33%), and the humidity is h31%, h32%, Control may be performed to increase the rotational speed of the fan 9 each time the h33% is reached.

According to the present embodiment, air conditioners (indoor unit 10, outdoor unit 20) that suck air W in space W0 to be air-conditioned and control the temperature of air W, and air conditioners (indoor unit 10, outdoor unit 20) that a radiant panel module 40, a fan 9 for sending air W temperature-controlled by an air conditioner to the radiant panel module 40, and an outlet W2A for blowing out the air W that has passed through the radiant panel module 40 to the space W0. In the air conditioning system 100, dew condensation on the surface of the radiation panel module 40 (surface in contact with the space W0) during cooling operation can be prevented. In addition, it is known that comfort is increased when the humidity is low during cooling, but according to this embodiment, since the humidity in the room is lowered when the cooling operation is started, the temperature in the room reaches the set temperature. You can increase the comfort between.

In FIG. 2, a configuration example in which a heat exchange channel and a bypass channel are provided inside the radiant panel modules 40 and the radiant panel modules 40 are connected to each other to form a channel for the air W is given. Not limited. Only heat exchange channels are provided in the radiant panel module 40, the duct 13 and each radiant panel module 40 are individually directly connected by piping or the like, and air W is sent to the radiant panel module 40 to be cooled or heated. Alternatively, the air W may not be delivered to the radiant panel modules 40 that are not targeted. FIG. 8 shows a configuration example of such an air conditioning system 100. As shown in FIG.

FIG. 8 is a diagram showing a connection example of radiation panels in one embodiment of the present invention.
In the example shown in FIG. 8, four radiant panel modules 60A, 60B, 60C and 60D are arranged on the floor of the space W0. The radiant panel module 60A includes channel forming members 61A1, 61A2, 61A3, 61A4, 61A5, an inlet section 64A, and an outlet section 65A. The floor-side surface of the radiation panel module 60A is formed of a radiation panel (not shown). The inlet portion 64A is connected to the pipe L1, and the air W passes through the duct 13 and the pipe L1 and is supplied to the radiant panel module 60A. A valve V1 is provided in the pipe L1. When the control device 30 (control unit 35) opens the valve V1, the air W is supplied to the radiation panel module 60A. Not supplied to module 60A. When the valve V1 is opened, the air W that has passed through the heat exchange channel of the radiant panel module 60A is sent from the outlet 65A to the pipe L2. A pipe connecting the outlet portion 65A and the pipe L2 may be provided with a check valve so as to allow only a flow from the outlet portion 65A to the pipe L2. The air W sent to the pipe L2 is discharged to the space W0 from the discharge port W2A and the like. The same is true for the other radiant panel modules 60B-60D. Pipes for supplying air W (pipes L4, L3, L6, respectively) are connected to each of the radiation panel modules 60B to 60D, and valves (valves V4, V3, V6, respectively) are provided in each pipe. .

For example, when the air W is not supplied to the radiation panel module 60A and the air W is supplied to the radiation panel module 60C, the control unit 35 controls the valve V1 to close, the valve V2 to close, and the valve V3 to open. Then, the air W is supplied from the duct 13 through the piping L3 to the radiation panel module 60C and passes through the inside of the radiation panel module 60C. The air W sent out from the radiation panel module 60C is discharged from the outlets W2A and the like. When air W is supplied to both the radiation panel modules 60A and 60C, the control unit 35 controls the valve V1 to open, the valve V2 to close, and the valve V3 to open. When the air W is not supplied to both the radiation panel modules 60A and 60C, the control unit 35 controls the valve V1 to close, the valve V2 to open, and the valve V3 to close. Then, the air W passes through the pipe L2 from the duct 13 and reaches the outlet W2A and the like. This flow is the same as when both the dampers 42A and 42B are controlled to be open in the example of FIG. In other words, in the case of the configuration of FIG. 8, by interlocking the opening and closing of the valves V1, V2, and V3, the air W passes through the heat exchange channels of the radiant panel modules 60A, etc., or bypass channels (pipe L2). , L5).

For example, during the dew condensation prevention operation at the start of the cooling operation, the controller 35 closes the valve V1, opens the valve V2, and closes the valve V3 as the rotation speed of the fan 9 decreases. Similarly, the controller 35 closes the valve V4, opens the valve V5, and closes the valve V6. As a result, the air W can be guided to the bypass channel, and dew condensation can be prevented.

In addition, it is possible to appropriately replace the components in the above-described embodiments with well-known components without departing from the scope of the present invention. Moreover, the technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.
For example, even when the cooling operation is started, the dew condensation prevention operation may be performed only when the humidity measured by the humidity sensor is equal to or higher than a predetermined value. Also, the dew condensation prevention operation may be performed only by controlling the rotation speed of the fan 9 to decrease. Alternatively, the dew condensation prevention operation may be performed only by controlling the supply of the air W to the bypass flow path. Also, in the above embodiment, an example in which the radiant panel module 40 and the like are arranged on the floor was given, but they may be arranged on the ceiling or the wall. The valves V1 to V6 are an example of a switching mechanism for switching the flow path of the air W between the radiation panel module 60 and the bypass flow path (pipes L2, L5).

DESCRIPTION OF SYMBOLS 1... Compressor 2... Indoor heat exchanger 3... Expansion valve 4... Outdoor heat exchanger 5... Four-way valve 6... Refrigerant piping 9... Fan 10... Indoor Machine 11...Temperature sensor 12...Humidity sensor 13...Duct 20...Outdoor unit 21...Control device 30...Control device 31...Sensor information acquisition unit 32...Setting information Acquisition unit 33... Timer 34... Storage unit 35... Control unit 36... Communication unit 40A, 40B, 40C, 40D... Radiation panel module 41A1, 41A2, 41A3, 41A4, 41A5, 41A6. Flow path forming member 42A Damper 43A Damper control unit 44A Inlet part 45A Outlet part 46A Bypass flow path 47A1, 47A2, 47A3, 47A4, 47A5, 47A6, 47A7 ... heat exchange flow path 50A, 50C ... piping 60A, 60B, 60C, 60D ... radiation panel module 61A1, 61A2, 61A3, 61A4, 61A5 ... flow path forming member 64A ... inlet portion 65A ... outlet part 100 ... air conditioning system L1, L2, L3, L4, L5, L6 ... piping V1, V2, V3, V4, V5, V6 ... valve W ... air W0 ... Space W1: Inlet W2A, W2B, W2C, W2D: Outlet

Claims (8)

An air conditioner that takes in air in a space to be conditioned and controls the temperature of the air, a radiant panel module that is arranged on a surface in contact with the space, and the air whose temperature is controlled by the air conditioner. An air conditioning system including a fan for sending air to the radiant panel module and an air outlet for blowing the air that has passed through the radiant panel module to the space,
storing a setting table that defines the relationship between the operating time of the fan for preventing humidity and condensation ;
An operation in which the air volume of the fan at the start of cooling operation is reduced below a predetermined value,
Execute for an operation time corresponding to the humidity based on the humidity of the space at the start of the cooling operation and the setting table;
Control device. Regarding the humidity of the space at the start of the cooling operation, if the first humidity is higher than the second humidity, the control to reduce the air volume of the fan is longer in the case of the first humidity than in the case of the second humidity. run time,
A control device according to claim 1 . In the control to reduce the air volume of the fan,
While the relative humidity of the space is higher than the third humidity, the air volume is reduced to a first air volume, and when the relative humidity decreases to the third humidity, the air volume is increased to a second air volume that is higher than the first air volume.
The control device according to claim 1 or 2. Only when the relative humidity of the space at the start of the cooling operation is equal to or higher than a predetermined value, the control to reduce the air volume of the fan is performed;
The control device according to any one of claims 1 to 3. Control to reduce the air volume of the fan is executed when the relative humidity of the space reaches a predetermined value or more during the cooling operation.
The control device according to any one of claims 1 to 4. The radiant panel module includes a heat exchange flow path that exchanges heat with the space, a bypass flow path that bypasses the heat exchange flow path, and a flow path for the air that connects the heat exchange flow path and the bypass flow path. a damper that switches between roads and
Controlling the damper so that the air passes through the bypass flow path while performing control to reduce the air volume of the fan;
The control device according to any one of claims 1 to 5. an air conditioner that sucks air in a space to be air-conditioned and controls the temperature of the air;
a radiant panel module disposed on a surface contacting the space;
a fan for sending the air temperature-controlled by the air conditioner to the radiant panel module;
an air outlet for blowing the air that has passed through the radiant panel module into the space;
A control device according to any one of claims 1 to 6;
air conditioning system. An air conditioner that takes in air in a space to be conditioned and controls the temperature of the air, a radiant panel module that is arranged on a surface in contact with the space, and the air whose temperature is controlled by the air conditioner. a fan for sending air to the radiant panel module, an outlet for blowing out the air that has passed through the radiant panel module to the space, and a setting table that defines the relationship between humidity and operation time of the fan for preventing condensation . In an air conditioning system containing
An operation in which the air volume of the fan is reduced below a predetermined value at the start of cooling operation,
A control method that executes only an operation time corresponding to the humidity based on the humidity of the space at the start of the cooling operation and the setting table.

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