JP2020012577A - Control device, air conditioning system and control method - Google Patents

Abstract

To provide a control method for setting an operation mode which emphasizes temperature control on a radiation surface and an operation mode which emphasizes temperature control in a space, in an air conditioning system in which a radiation type and a convection type are combined.SOLUTION: In an operation of an air conditioning system which includes an air conditioner for sucking the air in an air-conditioning target space and for controlling the temperature of the air, a radiation panel module arranged on a surface coming into contact with the space, a fan for delivering the air whose temperature has been controlled by the air conditioner to the radiation panel module, and a blowout port for blowing out the air which has passed the radiation panel module to the space, a control device includes two operation modes: a radiation surface emphasizing mode for preferentially performing temperature control on a radiation surface; and a space emphasizing mode for preferentially performing temperature control of the space.SELECTED DRAWING: Figure 1

Description

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

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

  Patent Literature 2 discloses a heating device in which a plurality of floor heating panels are arranged on a floor surface and hot water is supplied from a heat pump unit to the floor heating panels. FIG. 12 of Patent Document 2 shows that in an intermittent operation in which the flow rate of hot water supplied to a part of a plurality of floor heating panels is reduced, the number of rotations of a compressor, a blower fan of an outdoor heat exchanger, and an opening degree of an expansion valve are shown. A control method for suppressing the rise in the high pressure of the refrigerant circuit by controlling the pressure is described.

JP-A-2004-232929 JP 2010-203749 A

  For example, in a floor radiation cooling / heating system as described in Patent Document 1, there is a need for warming the feet, but there is a need for performing air conditioning with more emphasis on the temperature of the entire space than the temperature of the feet. . However, a function for executing control suitable for each need according to the user's preference is not provided. Further, Patent Documents 1 and 2 do not disclose selecting and executing control according to each need.

  Therefore, 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 embodiment of the present invention, the control device is an air conditioner that controls the temperature of the air by inhaling air in a space to be air-conditioned, and a radiant panel module disposed on a surface in contact with the space, In the operation of an air conditioning system including a fan that sends out the air temperature-controlled by the air conditioner to the radiant panel module and an outlet that blows the air that has passed through the radiant panel module into the space, There are two operation modes, a radiation surface emphasis mode in which the temperature control of the radiation surface of the panel module is preferentially performed, and a space emphasis mode in which the temperature control of the space is preferentially performed.

  According to one aspect of the present invention, the control device controls the rotation speed of the fan at a lower speed in the radiation surface emphasis mode than in the space emphasis mode.

  According to one aspect of the present invention, the control device controls the rotation speed of the fan at a higher speed in the space emphasis mode than in the radiation surface emphasis mode.

  According to one aspect of the present invention, the control device performs temperature control on a set temperature by controlling a rotation speed of a compressor included in the air conditioner based on a temperature difference between a temperature of the space and a set temperature. The switching between the emission surface emphasis mode and the space emphasis mode is performed by changing the rotation speed of the fan.

  According to one aspect of the present invention, the control device includes a radiation surface temperature rise prevention function that increases the rotation speed of the fan to a predetermined value when the temperature of the radiation surface becomes equal to or higher than a predetermined first threshold value.

  According to one aspect of the present invention, the control device reduces the rotation speed of the fan when the temperature of the radiation surface is equal to or less than a predetermined second threshold value lower than the first threshold value.

  According to one aspect of the present invention, the control device has a radiation surface temperature drop prevention function that increases the rotation speed of the fan to a predetermined value when the temperature of the radiation surface becomes equal to or less than a predetermined third threshold value.

  According to one embodiment of the present invention, the air conditioning system sucks air in a space to be air-conditioned and controls an air conditioner that controls the temperature of the air, and a radiant panel module disposed on a surface in contact with the space. A controller for sending the air temperature-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 control device according to any one of the above. And.

  According to one aspect of the present invention, the control method includes: an air conditioner that suctions air in a space to be air-conditioned and controls the temperature of the air; and a radiant panel module disposed on a surface in contact with the space. In the operation of an air conditioning system including a fan that sends out the air temperature-controlled by the air conditioner to the radiant panel module and an outlet that blows out the air that has passed through the radiant panel module into the space, By changing the number of rotations of the radiating panel module, two operation modes, a radiating surface emphasis mode in which the temperature control of the radiating surface of the radiating panel module is preferentially performed and a space emphasis mode in which the temperature control of the space is preferentially controlled, are performed. Switch and execute.

  ADVANTAGE OF THE INVENTION According to this invention, in the air-conditioning system which combined the radiation type and the convection type, it selects and performs the operation mode which emphasizes the temperature control of the surface temperature (radiation surface) of a radiation panel, and the operation mode which emphasizes the temperature control of space. can do.

It is a schematic diagram showing an example of an air conditioning system in one embodiment of the present invention. It is a figure which shows the radiation panel in one Embodiment of this invention, and its arrangement example. 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. 4 is a flowchart of operation mode switching control according to one embodiment of the present invention. It is a flow chart of floor surface temperature rise prevention control at the time of heating in one embodiment of the present invention.

<Embodiment>
Hereinafter, the air conditioning system of the present embodiment will be described with reference to the drawings.
FIG. 1 is a schematic diagram illustrating an example of an air conditioning system according to an embodiment of the present invention.
The air conditioning system 100 includes an indoor unit 10, an outdoor unit 20, radiation panel modules 40A and 40B, and a duct 13. Hereinafter, the radiation panel modules 40A, 40B and the like may be collectively referred to as the radiation panel module 40.
The indoor unit 10 is installed at the back of the ceiling of the space W0 in the room to be air-conditioned, sucks the air W in the space W0 from the suction port W1, adjusts the air W to an appropriate temperature, and sends the air W to the duct 13. . At least one radiant panel module 40 is arranged on a floor, a wall surface, a ceiling, or the like of the space W0, and the temperature-controlled air sent to the duct 13 is supplied to the radiant panel module 40. The radiant panel module 40 includes a radiant panel that radiates radiation heat to the space W0, and an air passage through which the air W supplied from the indoor unit 10 passes. The radiating panel is disposed on a surface such as a floor, a wall, or a ceiling such that a radiating surface (radiating panel) faces the space W0 side so as to be in contact with the space W0. Cool or heat the radiant panel. When the radiant panel is cooled or heated, the radiant heat is transmitted to the space W0 via the radiant panel to cool or heat the space W0. The radiation panel module 40A and the radiation panel module 40B are connected by piping or the like, and the air W that has passed through the radiation panel module 40A is supplied to the radiation panel module 40B. The air W supplied from the indoor unit 10 passes through the radiating panel module 40A and the radiating panel module 40B, is blown out from the outlet W2A into the space W0, and cools or heats the space W0. As described above, the air conditioning system 100 performs air conditioning by the two methods of the radiation type and the convection type to perform cooling and heating of the space W0.

  The air conditioning system 100 includes a temperature sensor 16 that measures the temperature of the radiation surface of the radiation panel module 40. The temperature sensor 16 that measures the temperature of the radiation surface is, for example, the infrared temperature sensor 14. Alternatively, the temperature sensor 16 may be thermocouples 15A, 15B provided on the radiation surface of the radiation panel modules 40A, 40B. When radiating panel module 40 is arranged on the floor surface as in the example of FIG. 1, temperature sensor 16 measures the floor surface temperature.

Next, an example of the configuration and arrangement of the radiation panel module 40 will be described.
FIG. 2 is a diagram showing a radiating panel module and an example of its arrangement according to an embodiment of the present invention. FIG. 2 shows a plan view of the radiation panel module 40. In the example shown in FIG. 2, four radiating 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 using 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 unit 43A, an inlet unit 44A, and an outlet unit 45A. The upper surface (the floor of the space W0) of the radiation panel module 40A is formed by a radiation panel (not shown). The damper control unit 43A controls the opening and closing operation of the damper 42A based on an instruction from the control device 30. When the damper 42A is at the position indicated by the solid line (open state), the air W flowing from the inlet 44A passes through the bypass flow passage 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 at the position shown by the broken line under the control of the damper control unit 43A (closed state), the air W flowing from the inlet 44A flows in the heat exchange channels 47A1, 47A2, 47A2 in the direction shown by the broken arrow. It passes through 47A3, 47A4, 47A5, 47A6, 47A7, and is sent out from the outlet 45A.

  When the air W passes through the heat exchange channel 47A1, etc., the radiation heat from the radiant panel module 40A increases, and the floor (radiant panel) becomes warm during heating. Conversely, when the air W passes through the bypass flow passage 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 in the area where the radiation panel module 40A is arranged, the remote controller or the like issues 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 in the area where the radiating panel module 40A is arranged during the cooling operation, the remote controller issues an instruction to switch the damper 42A to suppress the foot from cooling down, and the air W passes through the bypass flow path 46A. Can be controlled to The radiation panel modules 40B to 40D have the same configuration.

  As shown, the radiation panel module 40A and the radiation 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 branches into two and is connected to the inlets 44A and 44C. The air W whose temperature has been controlled is supplied from the indoor unit 10 to the entrance 44A of the radiation panel module 40A and the entrance 44C of the radiation panel module 40C via the duct 13. The air W supplied to the radiant panel module 40A passes through the bypass channel 46A or the heat exchange channel 47A1, etc., 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 radiation panel modules 40B and 40D. The air W sent out from the outlets 45B and 45D by the radiant panel modules 40B and 40D is blown out from the outlets W2A to W2D into the space W0.

  Since the dampers 42A to 42D of the radiant panel modules 40A to 40D can be independently controlled, for example, only the radiant panel module 40A closes the damper 42A so that the air W flows through the heat exchange channel 47A1 or the like. The radiating panel modules 40B to 40D can control the dampers 42B to 42D to be in the open state, 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 intake port W1 on the ceiling and the outlet ports W2A to W2D can be provided at separate positions, and a plurality of radiating panel modules 40 can be arranged between them. For example, if the inlet W1 and the outlet W2A are provided at positions near both ends of the room to be air-conditioned, the entire room can be air-conditioned evenly in the convective air-conditioning. Further, by connecting the plurality of radiant panel modules 40 in any direction via the pipe 50, the radiant panel can be arranged in a two-dimensional plane. Thereby, the whole room can be air-conditioned by the radiation type 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 so that the state can be switched between an open state and a closed state in multiple stages. Thereby, 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 more precise temperature control can be performed. For example, if the user feels that the temperature of the floor is high during heating, the damper control unit 43A may control the position of the damper 42A to an intermediate position between the open state and the closed state according to a user's instruction. Then, since a smaller amount of air W flows into the heat exchange channel 47A1 and the like than in the case where the closed state is controlled, it is possible to suppress an increase in the temperature of the floor.

  Returning to FIG. 1, the air W sucked from the suction port W <b> 1 exchanges heat with the indoor heat exchanger 2 provided in the indoor unit 10, is controlled to an appropriate temperature, and is sent out again to the duct 13 by the fan 9. Is done. The indoor unit 10 includes an indoor heat exchanger 2, a fan 9, a temperature sensor 11, a humidity sensor 12, and a control device 30. Further, the control device 30 is connected to the temperature sensor 16. 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. The control device 30 controls the rotation speed of the fan 9 based on the measurement values of the temperature sensor 11 and the humidity sensor 12 and sends out the air W to the duct 13. The indoor unit 10 is connected to the outdoor unit 20 via a refrigerant pipe 6, a communication line (not shown), and the like. The indoor unit 10 and the outdoor unit 20 constitute a refrigeration cycle, heat and cool the refrigerant by circulating the refrigerant in the refrigeration cycle, and control 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 with reference to FIG. FIG. 3 is a diagram illustrating an example of a refrigerant circuit according to an embodiment of the present invention.
As shown in FIG. 3, the indoor unit 10 includes the indoor heat exchanger 2 and the 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. The compressor 1, the indoor heat exchanger 2, the expansion valve 3, the outdoor heat exchanger 4, and the four-way valve 5 are connected by a refrigerant pipe 6.
The compressor 1 compresses the refrigerant and discharges the compressed high-temperature, high-pressure refrigerant. In the 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 and becomes a low-pressure refrigerant. The low-pressure refrigerant is supplied to the outdoor heat exchanger 4, and is 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 a low-pressure refrigerant and discharges a high-pressure refrigerant.

  In the 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 and radiates heat to the outside air to be condensed. The condensed refrigerant is decompressed by the expansion valve 3. The low-pressure refrigerant is supplied to the indoor heat exchanger 2 and absorbs heat from the air W to cool the air W and evaporate. The vaporized refrigerant passes through the four-way valve 5 and is sucked into the compressor 1. The compressor 1 compresses a low-pressure refrigerant and discharges a high-pressure refrigerant.

  The control device 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 refrigeration cycle is operated such that the temperature of the space W0 becomes 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 rotation speed, and sends out the air W after the heat exchange controlled to a desired temperature to the duct 13. Further, for example, the control device 30 controls the rotation speed of the fan 9 based on the temperature of the radiation surface measured by the temperature sensor 16. The control device 30 controls the temperature of the floor surface by controlling the rotation speed of the fan 9.

FIG. 4 is a block diagram illustrating an example of a control device according to an 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 unit 31, a setting information acquisition unit 32, a timer 33, a storage unit 34, a control unit 35, and a communication unit 36. The control device 30 performs various controls on the indoor unit 10. In this specification, a description will be given mainly of a function of controlling the temperature of the floor surface by the rotation speed of the fan 9.

The sensor information acquisition unit 31 acquires the measured value of the temperature of the air W from the temperature sensor 11, the measured value of the humidity of the air W from the humidity sensor 12, and the floor surface temperature (surface temperature of the radiation surface) from the temperature sensor 16.
The setting information acquisition unit 32 acquires various setting information input by a user from a remote controller or the like. For example, the setting information acquisition unit 32 instructs the start and stop of the operation, the setting of the cooling / heating, the setting of the room temperature, the setting of the air volume, and which area of the floor (any of the radiation panel modules 40A to 40D) is heated ( Or cooling), operating in an operation mode that emphasizes the floor surface temperature (surface temperature of the radiation surface of the radiation panel module 40) (radiation surface emphasis mode), or in an operation mode in which space temperature (space emphasis mode) is emphasized. Acquire setting information such as whether to drive. The radiation surface emphasis mode is an operation mode in which the operation is performed so that the floor surface temperature becomes warmer in the case of heating, and an operation mode in which the operation is performed such that the floor surface temperature is cooled in the case of cooling. The space emphasis mode is an operation mode in which the temperature of the space W0 for cooling and heating is controlled so as to reach the set temperature quickly. For example, in the case of the radiation surface emphasis mode, the setting information acquisition unit 32 may acquire the setting information of the target floor surface temperature and the upper limit value and the lower limit value of the floor surface temperature. In addition, the setting information acquisition unit 32 may acquire setting information of a general operation mode (normal operation mode) that is neither the radiation surface emphasis mode nor the space emphasis mode.
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. Further, the storage unit 34 stores various programs that realize 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 at the time of cooling, the control unit 35 transmits the measurement of the temperature sensor 11 to the control device 21 of the outdoor unit 20 via the communication unit 36. Notify the setting information together with the value. The control device 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 controls the rotation speed of the fan 9 so that the air volume of the air W supplied to the duct 13 becomes the predetermined air volume. I do. For example, when the air volume can be set in three stages of high, medium, and low, the rotation speed of the fan 9 is determined for each of those settings, and the control unit 35 determines the rotation speed corresponding to the air volume setting set by the user. Drives the fan 9. Further, for example, when the user sets so that the area of the radiation panel module 40A is not cooled too much during cooling, the control unit 35 instructs the damper control unit 43A to open the damper 42A.

The control unit 35 controls the rotation speed of the fan 9 according to the operation mode set by the user. Specifically, when the operation mode is the radiation surface emphasis mode, the control unit 35 operates the fan 9 at a low speed, and when the operation mode is the space emphasis mode, operates the fan 9 at a high speed.
For example, in the case of heating, when the rotation speed of the fan 9 is increased, the amount of air per unit time of the air W passing through the indoor heat exchanger 2 increases. Then, the air W passes through the indoor heat exchanger 2 and is sent out to the duct 13 before the temperature is sufficiently raised. That is, the temperature of the air W sent from the indoor unit 10 is lower than when the air volume is small. Conversely, when the rotation speed of the fan 9 is reduced, the amount of air per unit time of the air W passing through the indoor heat exchanger 2 is reduced, and the air W is sufficiently heat-exchanged by the indoor heat exchanger 2 to reach a high temperature. It is sent to the duct 13 in the state where it has become.

  For example, in the case of heating, when the rotation speed of the fan 9 is reduced and hot air W is supplied to the radiant panel module 40 via the duct 13, the temperature of the radiant panel increases. Therefore, when the user designates the radiation surface emphasis mode, the control unit 35 operates by setting the rotation speed of the fan 9 to a lower speed than in the space emphasis mode. Conversely, in the case of the space-oriented mode, the air flow is increased so that more air W after temperature control is supplied to the space W0. Thereby, the temperature of the space W0 reaches the set temperature quickly.

  The same applies to cooling. That is, when the rotation speed of the fan 9 is increased, the air W passes through the indoor heat exchanger 2 without being sufficiently cooled, and is sent out to the duct 13 at a relatively high temperature. Conversely, when the rotation speed of the fan 9 is reduced, the sufficiently cooled air W is sent to the duct 13. Therefore, when the user designates the radiation surface emphasis mode during the cooling operation, the control unit 35 operates by setting the rotation speed of the fan 9 to a lower speed than in the space emphasis mode. Thereby, the floor surface is further cooled.

  As described above, separately from the switching of the operation mode, the control unit 35 controls the opening and closing of the damper 42A via the damper control unit 43A and the like to control the radiation panel module 40 disposed in the area to be heated or cooled more. Can be warmed or cooled.

  The communication unit 36 performs communication with the control device 21. For example, when the setting information acquisition unit 32 acquires an operation stop instruction, the communication unit 36 transmits the operation stop instruction to the control device 21 of the outdoor unit 20. The communication section 36 communicates with the damper control section 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, the flow of the process of switching the operation mode according to the present embodiment will be described using the configuration of the air conditioning system 100 in FIGS. 1 to 4 as an example.
FIG. 5 is a flowchart of the operation mode switching control according to the embodiment of the present invention.
First, the air conditioning system 100 starts a cooling or heating operation according to a user's instruction (step S11). Specifically, the user inputs a cooling or heating operation start instruction using a remote controller or the like. The communication unit 36 transmits the start instruction to the control device 21 of the outdoor unit 20. The control device 21 starts the operation of the refrigeration cycle by switching the four-way valve or starting the compressor 1 according to the cooling operation or the heating operation. During operation, the communication unit 36 transmits the temperature of the air W 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 rotation speed of the compressor 1 so that the temperature of the air W approaches the set temperature.

  Next, the user sets the operation mode from the remote controller. The setting information acquisition unit 32 acquires the operation mode setting information and outputs the information to the control unit 35. The control unit 35 determines the operation mode set by the user (Step S12). When the operation mode is the space-oriented mode (step S12; space), the control unit 35 operates by setting the rotation speed of the fan 9 to a predetermined second rotation speed or higher (step S13). When the operation mode is the radiation surface emphasis mode (step S12; floor), the control unit 35 operates the fan 9 while setting the rotation speed of the fan 9 to a predetermined first rotation speed or less (step S14). Here, the first rotation speed is a value lower than the second rotation speed. When the air volume of the fan 9 can be set in five stages, for example, the first rotation speed is the rotation speed corresponding to the second air volume from the bottom, and the second rotation speed is the rotation speed corresponding to the second air volume from the top. It is. In such a setting, for example, in the radiation surface emphasis mode, the control unit 35 operates the fan 9 at a rotation speed corresponding to the smallest air volume for a while from the start of the operation to preferentially heat the floor. Alternatively, when cooling is performed and the floor surface temperature detected by the temperature sensor 16 reaches a predetermined target temperature, the rotation speed of the fan 9 may be increased to the rotation speed corresponding to the second lowest airflow. Similarly, in the case of the space emphasis mode, for a while after the start of operation, the fan 9 is operated at the rotation speed corresponding to the largest air flow, and the difference between the temperature measured by the temperature sensor 11 and the set temperature is a predetermined value. When reaching the range, the rotation speed of the fan 9 may be reduced to the rotation speed corresponding to the second airflow from the top. In the case of the radiation surface emphasis mode, after the rotation speed corresponding to the second lowest air volume is increased, if the difference between the floor surface temperature by the temperature sensor 16 and the predetermined target temperature is out of the predetermined range, the fan is restarted. 9 may be reduced to the number of revolutions corresponding to the smallest airflow to enhance the temperature control of the floor. The same applies to the space-oriented mode.

  When the operation mode is the normal operation mode (step S12; normal), the control unit 35 operates by setting the rotation speed of the fan 9 to the rotation speed corresponding to the air volume set by the user (step S15).

  Next, the control unit 35 determines whether to end the cooling or heating operation (step S16). For example, when the setting information acquisition unit 32 acquires information for instructing to stop the operation, the control unit 35 determines that the cooling or heating operation is to be ended. If the operation is not to be terminated (Step S16; No), the processing from Step S12 is repeated. When the operation is to be ended (Step S16; Yes), the control devices 21 and 30 perform a cooling or heating operation end process. For example, the control device 21 stops the compressor 1. Further, the control unit 35 stops the fan 9.

  According to the present embodiment, the temperature of the radiation surface of the radiation panel module 40 can be controlled by changing the rotation speed of the fan 9. In addition, by providing a radiation surface-oriented mode and a space-oriented mode as available operation modes, according to the user's preference, for example, if the user prefers to warm up his feet during heating, the radiation surface-oriented mode is used. A desired air conditioning environment can be obtained by making a selection. For example, a user who does not like to cool his / her feet during cooling can select a space-oriented mode to provide a comfortable space.

By the way, when using floor heating, there is a possibility that the user may get a low-temperature burn depending on the temperature of the floor surface that comes into contact with the human body. In the present embodiment, the risk of low-temperature burn can be reduced by controlling the rotation speed of the fan 9.
FIG. 6 is a flowchart of control for preventing a rise in floor temperature during heating in one embodiment of the present invention.
It is assumed that the control unit 35 holds information on the radiation surface temperature at which there is a risk of low-temperature burn. First, the air-conditioning system 100 starts a heating operation according to a user's instruction (step S21). The outdoor unit 20 operates the refrigeration cycle based on the measurement value of the temperature sensor 11 and the temperature set by the user, as described with reference to FIG. In the indoor unit 10, the control unit 35 controls the rotation speed of the fan 9 while monitoring the measurement value of the temperature sensor 16.
Specifically, the control unit 35 determines whether or not the floor surface temperature measured by the temperature sensor 16 is equal to or higher than a first threshold (Step S22). The first threshold value is, for example, a temperature set low enough to allow a floor surface temperature at which a low-temperature burn may occur. When the floor surface temperature does not reach the first threshold value (Step S22; No), the control unit 35 continues the operation of the fan 9 at a predetermined rotation speed according to the operation mode or set by the user. When the floor surface temperature is equal to or higher than the first threshold value (step S22; Yes), the rotation speed of the fan 9 is set to be equal to or higher than the third rotation speed and the fan 9 is operated (step S23). The third rotation speed is a rotation speed corresponding to the amount of air that can suppress a rise in the temperature of the radiation surface of the radiation panel module 40 during heating. As described above, by increasing the rotation speed of the fan 9, relatively low-temperature air W is supplied to the radiation panel module 40 in the heating operation. Thereby, the temperature rise of the radiation panel can be prevented.

  When the rotation speed of the fan 9 is set to be equal to or higher than the third rotation speed, the control unit 35 determines whether or not the floor surface temperature has dropped below the second threshold value (step S24). The second threshold is a temperature set lower than the first threshold for control stability. When the floor surface temperature does not decrease below the second threshold value (Step S24; No), the control unit 35 continues the operation of the fan 9 at the third rotation speed or higher. When the floor surface temperature falls below the second threshold value (Step S24; Yes), the control unit 35 returns the rotation speed to the original rotation speed before raising it to the third rotation speed or more, and operates the fan 9 (Step S25). ). Next, the control unit 35 determines whether to end the heating operation (Step S26). When the heating operation is not ended (Step S26; No), the control unit 35 repeats the processing of Step S22 and subsequent steps. When ending the heating operation (Step S26; Yes), the control devices 21 and 30 perform an ending process of the heating operation. Such control can protect the user from low-temperature burns.

  The control described in FIG. 6 can be applied to other than the prevention of low-temperature burn. For example, depending on the material of the radiant panel, warpage or deterioration of the material may occur if the operation continues at a certain temperature or higher. The same control as in FIG. 6 may be performed for the purpose of preventing such material warpage and deterioration. For example, the material information of the radiation surface and the information of the first threshold value and the second threshold value corresponding thereto are registered in the storage unit 34 in advance. Then, the material information of the radiation panel of the radiation panel module 40 can be set from the remote controller. Then, during the heating operation, the control unit 35 performs the same control as in the flowchart of FIG. 6 based on the first threshold value and the second threshold value corresponding to the set material information. This can prevent the radiation panel from deteriorating due to a rise in floor temperature. In the flowchart of FIG. 6, the rotation speed of the fan 9 is changed only by the floor surface temperature. However, the rotation speed of the fan 9 may be controlled in consideration of the continuous operation time and the accumulated operation time. For example, the determination in step S22 can be changed to a condition such as "has the state where the floor surface temperature is equal to or higher than the first temperature has continued for X minutes?"

  Further, the user may set arbitrary values for the first threshold value and the second threshold value from the remote controller, and control the floor surface temperature to be maintained within a desired range by the control of FIG. In this case, the first threshold is the upper limit of the floor surface temperature, and the second threshold is the lower limit. In addition, a target value of the floor surface temperature can be set instead of the first threshold value and the second threshold value, and the control unit 35 sets an appropriate first threshold value and a second threshold value with respect to the set target temperature. Alternatively, control may be performed such that the floor surface temperature during heating becomes the target temperature set by the user. Thus, the user can control the floor surface temperature to be within a desired range.

  The control shown in FIG. 6 can also be applied to a cooling operation. For example, in the determination of step S22, it is determined whether or not the floor surface temperature is equal to or lower than a third threshold value. If the floor surface temperature is lower than the third temperature, the rotation speed of the fan 9 is increased to prevent the floor surface temperature from lowering ( Radiation surface temperature drop prevention function). In the determination of step S24, it is determined whether the floor temperature is equal to or higher than a fourth threshold (third threshold <fourth threshold), and as a result of increasing the rotation speed of the fan 9, the floor temperature is equal to or higher than the fourth threshold. If it rises again, the rotation speed of the fan 9 is reduced again. Thereby, the floor surface temperature can be controlled in a desired range during the cooling operation.

  According to the present embodiment, the air conditioner (the indoor unit 10 and the outdoor unit 20) that inhales the air W in the space W0 to be air-conditioned and controls the temperature of the air W is disposed on a surface in contact with the space W0. A radiation panel module 40, a fan 9 for sending out the air W whose temperature is controlled by the air conditioner to the radiation panel module 40, an outlet W2A for blowing the air W passing through the radiation panel module 40 to the space W0, and the like. In the air-conditioning system 100, the temperature of the radiation panel surface can be controlled by increasing or decreasing the rotation speed of the fan 9. Further, by adjusting the rotation speed of the fan 9, it is possible to select whether to give priority to the temperature control of the radiation surface of the radiation panel module 40 or to the temperature control of the space.

In addition, it is possible to appropriately replace the components in the above-described embodiment with known components without departing from the spirit of the present invention. The technical scope of the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, an example in which the radiation panel module 40 and the like are arranged on the floor surface has been described, but they may be arranged on a ceiling or a wall surface.

DESCRIPTION OF SYMBOLS 1 ... Compressor 2 ... Indoor heat exchanger 3 ... Expansion valve 4 ... Outdoor heat exchanger 5 ... Four-way valve 6 ... Refrigerant pipe 9 ... Fan 10 ... Indoor Unit 11 Temperature sensor 12 Humidity sensor 13 Duct 14 Infrared temperature sensor 15 Thermocouple 16 Temperature sensor 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: Radiant 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 Roads 47A1, 47A2, 47A3, 47A4, 47A5, 47A6, 47A7: heat exchange channels 50A, 50C: piping 100: air conditioning system W: air W0: space W1: suction port W2A, W2B, W2C, W2D ... outlet

Claims (9)

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 in contact with the space, and the air that is temperature-controlled by the air conditioner. In operation of an air conditioning system including a fan that sends out to the radiant panel module, and an outlet that blows out the air that has passed through the radiant panel module into the space,
The radiation panel module has two operation modes: a radiation surface-oriented mode in which temperature control of the radiation surface of the radiation panel is preferentially performed, and a space-oriented mode in which temperature control of the space is preferentially performed.
Control device. In the radiation surface emphasis mode, the rotation speed of the fan is controlled to be lower than in the space emphasis mode,
The control device according to claim 1. In the space emphasis mode, controlling the rotation speed of the fan faster than in the radiation surface emphasis mode,
The control device according to claim 1. The control device performs temperature control on a set temperature by controlling a rotation speed of a compressor included in the air conditioner based on a temperature difference between the temperature of the space and a set temperature,
Switching between the radiation surface emphasis mode and the space emphasis mode is performed by changing the rotation speed of the fan,
The control device according to any one of claims 1 to 3. A radiation surface temperature rise prevention function for increasing the rotation speed of the fan to a predetermined value when the temperature of the radiation surface is equal to or more than a predetermined first threshold value;
The control device according to any one of claims 1 to 4, further comprising: When the temperature of the radiation surface is equal to or less than a predetermined second threshold lower than the first threshold, the rotation speed of the fan is reduced,
The control device according to claim 5. A radiation surface temperature lowering prevention function for increasing the rotation speed of the fan to a predetermined value when the temperature of the radiation surface is equal to or less than a predetermined third threshold value;
The control device according to any one of claims 1 to 6, further comprising: An air conditioner that inhales air in a space to be air-conditioned and controls the temperature of the air,
A radiant panel module arranged on a surface in contact with the space;
A fan for sending the air temperature-controlled by the air conditioner to the radiant panel module,
An outlet for blowing the air that has passed through the radiant panel module into the space;
The control device according to any one of claims 1 to 7,
Air conditioning system equipped with. 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 in contact with the space, and the air that is temperature-controlled by the air conditioner. In operation of an air conditioning system including a fan that sends out to the radiant panel module, and an outlet that blows out the air that has passed through the radiant panel module into the space,
By changing the number of revolutions of the fan, there are two operation modes, a radiation-oriented mode in which temperature control of the radiation surface of the radiation panel module is given priority, and a space-oriented mode in which temperature control of the space is given priority. A control method that executes by switching modes.

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