JP6330177B2 - Control device and air conditioning system - Google Patents

Description

  The present invention relates to a control device and an air conditioning system for performing radiant air conditioning.

  In recent years, from the viewpoint of improving the efficiency of operating energy, an air conditioner has been proposed in which heat is stored in a housing at night and the indoor heat storage is performed by radiation using the heat stored in the housing in the daytime (for example, Patent Documents). 1).

  In this air conditioner, a radiant panel having a radiating plate and a water conducting pipe fixed to the back surface thereof, and a daytime cooling period, water at a predetermined temperature (for example, 19 ° C.) is recirculated to the water conducting pipe. Cooling is mainly performed, and the night body cooling period includes a control device for returning water having a temperature (for example, 17 ° C.) lower than the cooling period to the water conduction pipe.

JP 2009-162398 A

  However, the conventional air conditioner has a cooling period and enclosure cooling time even if the number of people staying indoors or the amount of heat generated by electrical appliances etc. in the room changes from day to day and the air conditioning load fluctuates. Since each temperature setting is constant, there is a possibility that the optimum operation as a heat storage system is not performed.

  Therefore, the objective of this invention is providing the control apparatus and air conditioning system which can set the temperature of the heat medium corresponding to the air-conditioning load which changes every day.

In order to achieve the above object, the present invention provides a heat transfer tube disposed on the back side of a radiant panel body disposed so as to form a ceiling surface by providing a space between the heat storage body on the ceiling side and a predetermined amount. A control device for controlling a heat source device that supplies a heat medium heated or cooled to a temperature, a calculation means for calculating an air conditioning load generated in a room during a predetermined period, and the highest air conditioning load and power rate reduction rate Storage means for storing first relationship information indicating a relationship with a high temperature of the heat medium, and second relationship information indicating a relationship between the air conditioning load and the temperature of the heat medium having the highest coefficient of performance of the heat source device; Selection means for selecting the first relation information or the second relation information, and the temperature of the heat medium corresponding to the air conditioning load calculated by the calculation means is selected by the selection means. related information or the second related information Providing an output means for outputting al acquired by, a control device having a.

In order to achieve the above-mentioned object, the present invention provides a radiant panel main body arranged to form a ceiling surface by providing a space between the heat storage body on the ceiling side and a rear surface side of the radiant panel main body. A heat transfer tube, a heat source device that supplies the heat transfer tube heated or cooled to a predetermined temperature to the heat transfer tube, a calculation unit that calculates an air conditioning load generated in the room during a predetermined period, an air conditioning load and a power rate reduction rate Storage means for storing first relationship information indicating a relationship with the temperature of the highest heat medium, and second relationship information indicating a relationship between the air conditioning load and the temperature of the heat medium having the highest coefficient of performance of the heat source device; The selection means for selecting the first relation information or the second relation information, and the temperature of the heat medium corresponding to the air conditioning load calculated by the calculation means is selected by the selection means. Relationship information or the second relationship To provide an air conditioning system comprising a control device, a and an output means for outputting the acquired from the broadcast.

  ADVANTAGE OF THE INVENTION According to this invention, the temperature setting of the heat medium corresponding to the air-conditioning load which changes every day is attained.

FIG. 1 is a diagram illustrating a schematic configuration example of an air conditioning system according to an embodiment of the present invention. FIG. 2 is a diagram showing an analysis model related to part A in FIG. FIG. 3 is a graph showing the temperature change due to the heat storage and release cycle. FIG. 4 is a graph showing a temperature change in an air-conditioning time zone on a certain day when the heat storage / heat dissipation cycle is repeated to become a periodic steady state. FIG. 5 is a graph showing a change in heat flux during an air conditioning time period on a certain day when the heat storage and release cycle is repeated and becomes periodically stationary. FIG. 6 is a graph showing the relationship between the water temperature and the nighttime rate of heat. FIG. 7 is a graph showing the relationship between the water temperature and the power rate reduction rate in the cooling operation mode. FIG. 8 is a diagram illustrating an example of the relationship between the temperature of the heat medium and the system COP in the cooling operation mode. FIG. 9 is an example of first control information indicating the relationship between the temperature of the heat medium that maximizes the electricity rate reduction rate and the air load. FIG. 10 is an example of second control information indicating the relationship between the temperature of the heat medium that maximizes the system COP and the air load.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each figure, about the component which has the substantially same function, the same code | symbol is attached | subjected and the duplicate description is abbreviate | omitted.

[Embodiment]
FIG. 1 is a diagram illustrating a schematic configuration example of an air conditioning system according to an embodiment of the present invention. This system is a frame heat storage type radiant air conditioning system using a combination of a radiation panel laid on the ceiling and a slab on the ceiling side.

  The air conditioning system 1 includes a radiation panel 2 laid on the ceiling side of a room 110 of a building 100, a heat source device 3 as a heat source device, and a control device 4 that controls the heat source device 3.

  The building 100 is, for example, an office building, and includes a wall 120 as a heat storage body mainly formed of concrete, and a slab 130 as a heat storage body mainly formed of concrete and partitioning each floor. The building 100 is not limited to an office building, and may be a detached house, an apartment house, a factory, a hospital, a public facility, a high-rise building, or the like.

(Configuration of radiation panel 2)
The radiation panel 2 is held by the panel main body 20 as a radiation panel main body, the heat transfer holding member 21 provided on the back surface 20a of the panel main body 20, and the heat transfer holding member 21, and circulates the heat medium (for example, water). The heat transfer tube 22 is provided. The heat transfer tube 22 may be held on the panel body 20 by a method other than the heat transfer holding member 21. The radiation panel 2 may be configured by a plurality of rectangular panel main bodies 20 and heat transfer tubes 22 held by the heat transfer holding members 21 of the panel main bodies 20.

  The panel body 20 and the heat transfer holding member 21 are made of a material having a high thermal conductivity, for example, a metal such as aluminum, an aluminum alloy, copper, or a steel plate.

  As the heat transfer tube 22, for example, a tube formed of a resin such as polyurethane as a main constituent material or a tube formed of a metal such as copper can be used.

(Configuration of heat source unit 3)
The heat source device 3 includes, for example, a compressor, a condenser, an evaporator, and the like, and is configured to be able to switch between a cooling operation mode and a heating operation mode by reversing the refrigerant flow using a four-way valve. .

  In addition, a temperature sensor 5 that detects the temperature (room temperature) of the room 110 is connected to the heat source unit 3. The heat source device 3 is supplied so that the room temperature detected by the temperature sensor 5 is maintained near the temperature (set temperature) set by the control device 4 during the air conditioning time period (for example, 8:00 to 18:00). The temperature of the heat medium supplied to the heat transfer tube 22 via the line 31 is controlled (feedback control). That is, in this feedback control, the flow rate of the heat medium is made constant and the temperature of the heat medium is controlled. In addition, the heat source machine 3 is. In the initial period of the air conditioning time zone, a heat medium having a temperature determined in advance according to the cooling operation mode or the heating operation mode is supplied to the heat transfer tube 22 via the supply line 31.

  Further, the heat source device 3 cools the heat medium to the temperature set by the control device 4 (in the cooling operation mode) or heats up (in the heating operation mode) during the heat storage time zone (for example, 22:00 to 8:00). To the heat transfer tube 22 via the supply line 31. The heat medium supplied to the radiation panel 2 passes through the heat transfer tube 22 and returns to the heat source unit 3 through the return line 32.

(Configuration of control device 4)
The control device 4 includes a control unit 40 that controls the heat source device 3, a storage unit 41 that stores various types of information, and an operation display unit 42 that inputs and displays various types of information.

  The control unit 40 includes a CPU (Central Processing Unit) and the like, and by executing a program 410 stored in the storage unit 41, an air conditioning load calculation unit 400, a water temperature setting unit 401, a room temperature setting as an example of a calculation unit. It functions as the unit 402 or the like.

  The storage unit 41 includes a ROM (Read Only Memory), a RAM (Random Access Memory), an HDD (Hard Disk Drive), and the like, and stores a program 410, first control information 411a, second control information 411b, and the like. .

  The first control information 411a is information corresponding to FIG. 9, which will be described later, for the cost-saving mode that can reduce the power charge. The second control information 411b is information corresponding to FIG. 10, which will be described later, for the energy saving mode in which the coefficient of performance (system COP) of the 24-hour energy storage and release cycle can be maximized. Here, the “coefficient of performance” represents the cooling capacity (kW) or the heating capacity (kW) per 1 kW of power consumption. The 1st and 2nd control information 411a, 411b is an example of the relationship information which shows the relationship between an air conditioning load and the temperature of a heat medium.

  The operation display unit 42 is, for example, a touch panel display, and has a configuration in which touch panels are superposed on the front surface of a display such as a liquid crystal display. The operation display unit 42 is configured to select a cooling operation mode or a heating operation mode on the operation mode selection screen for the air conditioning time zone, and to select a target room temperature in the selected cooling operation mode or the heating operation mode. Yes. Moreover, the operation display part 42 is comprised so that a cost saving mode or an energy saving mode can be selected on the operation mode selection screen for heat storage time zones.

The air conditioning load calculation unit 400 calculates, for example, the daytime air conditioning load in the daytime air conditioning time zone (for example, 8:00 to 18:00) by the following expression. The daytime is an example of a predetermined period.
Daytime air conditioning load = integrated value of daytime air conditioning load / (daytime air conditioning time x indoor floor area)
... Formula (1)
Here, the integrated value of the daytime air conditioning load is obtained from the specific heat, density, flow rate, (temperature difference between the inlet and outlet of the heat source unit 3), and time. In addition, the integrated value of the daytime air conditioning load is obtained continuously for a predetermined period (for example, three days) using the formula (1), the daytime air conditioning load is calculated from the integrated value, and the air conditioning for the day is calculated. The load may be updated daily.

  The water temperature setting unit 401 uses the first control information 411a corresponding to the cost saving mode selected by operating the operation display unit 42 by the user or the second control information 411b corresponding to the energy saving mode, to the air conditioning load calculation unit 400. The temperature of the heat medium corresponding to the air-conditioning load calculated by is acquired, and the temperature is set for the heat source unit 3 as the temperature of the heat storage time zone.

  The room temperature setting unit 402 sets the operation mode selected by operating the operation display unit 42 and the target room temperature for the heat source device 3.

  By setting the temperature of the heat medium based on the first or second control information 411a, 411b, the temperature of the heat medium supplied to the heat transfer tube 22 in the daytime (for example, 8:00 to 18:00) is set to the first temperature. When the temperature of the heat medium supplied to the heat transfer tube 22 at night (for example, 22:00 to 8:00) is the second temperature, the water temperature setting unit 401 is the second temperature in the cooling operation mode. The temperature is set to a temperature (for example, 15 ° C.) lower than the first temperature (for example, 17 ° C.), and in the heating operation mode, the second temperature is a temperature higher than the first temperature (for example, 23 ° C.). (For example, 25 ° C.).

(Heat storage and release cycle)
FIG. 2 is a diagram showing an analysis model related to part A in FIG. As an air conditioning load of this analysis model, it is assumed that a constant cooling load is generated assuming an interior zone (indoor space) where there is no skin load (a heat load entering from outside the building). The thickness of the slab 130 on the ceiling side is 150 mm, and the upper surface of the slab 130 is completely insulated. In this specification, the “air conditioning load” is a heat load generated per unit floor area from a person P staying in the room 110, the electrical product 111, or the like.

Air conditioning load _{q d} is, _{q rp} flowing and _{q cp} flowing into the lower surface of the radiation panel 2 by convective heat transfer in the room 110 (the surface 20b of the panel body 20), the lower surface of the radiation panel 2 by radiant heat transfer (surface 20b) And divided. These heat fluxes q _cp and q _rp reaching the upper surface of the radiant panel 2 (the back surface 20a of the panel body 20) are q _cs flowing into the lower surface 130a of the slab 130 on the ceiling side by convective heat transfer and the ceiling by the radiant heat transfer. Q _rs flowing into the lower surface 130 a of the side slab 130, and q _w discharged to the outside by the heat medium that reaches the inside of the radiation panel 2 and flows in the heat transfer tube 22. In the slab 130, q _cs and q _rs flowing from the lower surface 130a of the slab 130 are stored.

Here, the thermal equilibrium formula regarding the radiation panel surface temperature Tp is as follows.
q _cp + q _rp = q _w + q _rs + q _cs (2)
Further, the thermal equilibrium formula for the room temperature Tr is as follows.
q _cp + q _rp = q _d Formula (3)

  FIG. 3 is a graph showing the temperature change due to the heat storage and release cycle. FIG. 4 is a graph showing a temperature change in an air conditioning time zone (8: 00-18: 00) on a certain day when the heat storage and heat dissipation cycle is repeated to become a periodic steady state. FIG. 5 is a graph showing a change in heat flux during an air conditioning time zone (8: 00-18: 00) on a certain day when the heat storage and release cycle is repeated to become a periodic steady state. In FIG. 3, Tr is room temperature, To is the temperature of the lower surface 130a of the slab 130 (slab lower surface temperature), Tp is the temperature of the surface of the radiation panel 2 (surface 20b of the panel body), and Tw is heat. It is the temperature (water temperature) of the medium.

3, 4 and 5
(I) In the heat storage and heat dissipation cycle, 22: 00-8: 00 is a heat storage time zone, 8: 00-18: 00 is an air conditioning time zone, and 18: 00-22: 00 is an air conditioning stop time zone.
(Ii) The water temperature feedback control is performed so that the water temperature Tw (cold / warm water temperature during heat storage) is constant during the heat storage time zone, and the room temperature Tr is constant at 27 ° C.
(iii) It is assumed that a certain indoor load (air conditioning load) occurs during the air conditioning time zone, and no indoor load occurs during the heat storage time zone.
Under these conditions, the air conditioning load qd = 50 W / m ² , and the water temperature Tw at the time of heat storage is set to 12 ° C.

  From FIG. 3, it can be seen that the daytime water temperature Tw is stable from the fourth day (after 72 hours have elapsed) after the operation of the air conditioning system 1 is started. That is, it can be said that it became periodic stationary on the fourth day after the operation of the air conditioning system 1 was started. 4 to 10 to be described later are in a periodic steady state. 4 to 10 show calculation results in the analysis model shown in FIG. 2, and actually vary depending on the structure (performance) of the building, the performance of the air conditioner 3, the operation of the air conditioner 3, and the like. Result.

4 and 5, when the air conditioning is started, the slab lower surface temperature T ₀ is sufficiently low and the heat fluxes q _cs and q _rs from the slab 130 are large, but when the slab 130 gradually rises in temperature while dissipating cold heat, heat flux from the slab 130 is reduced, the heat source apparatus 3 to make up for it, by lowering the water temperature Tw increases heat flux q _w by processing the air-conditioning load.

  As an index for evaluating the performance of such an air conditioning system 1, a heat amount night shift rate, a power rate reduction rate, and a system COP are defined as follows.

The heat amount night shift rate η _sf is an efficiency that represents how much of the heat amount used for the processing of the air conditioning load is derived from electric power used at night, and is represented by the following equation.
η _sf = Q _rl / Q _d Equation (4)
However,
Q _rl : Integrated value of heat fluxes q _cs , q _{rs radiated} from slab 130 during air conditioning time zone Q _d : Integrated value of air conditioning load q _d generated during air conditioning time zone

The power rate reduction rate is expressed by the following equation as to how much the power rate has been reduced by introducing the heat storage system with respect to the power rate required for the non-heat storage system to process a certain air conditioning load.
Electricity rate reduction rate = (Electricity fee of non-thermal storage system-Electricity rate of storage system) / Electricity rate of non-thermal storage system (5)

A system COP (Coefficient Of Performance) (COP _s ) is a ratio of the amount of heat and power consumption that the heat source unit 3 inputs in the daytime and nighttime to process the air conditioning load, and is represented by the following equation.

FIG. 6 is a graph showing the relationship between the temperature of cold / hot water during heat storage and the nighttime rate of heat. FIG. 7 is a graph showing the relationship between the cold / hot water temperature during power storage and the power rate reduction rate. For example, when the air conditioning load is 50 W / m ² and the air conditioning system 1 is operated at a cold / hot water temperature of 19 ° C. in both the heat storage time zone and the air conditioning time zone, the heat quantity night shift rate is 14% as shown in FIG. Yes, the electricity rate reduction rate was 9% as shown in FIG.

However, as shown in FIG. 7, the electricity rate reduction rate when the air conditioning load is 50 W / m ² is maximized when the cold / hot water temperature during heat storage is 11 ° C., and the electricity rate reduction rate at this time is As shown in FIG. 6, the heat transfer rate at night is 46%. Therefore, in the present embodiment, the cold / hot water temperature during heat storage is set to 11 ° C., which is lower than the cold / hot water temperature during air conditioning.

FIG. 7 is a diagram illustrating an example of a relationship between the cold / hot water temperature and the electricity rate reduction rate during heat storage in the cooling operation mode. This figure shows a case where the nighttime electricity rate is a certain rate system that is cheaper than the daytime electricity rate. 7, in each of the air conditioning load ^{30W / m 2, 50W / m} 2, 70W / m 2, 90W / m 2, it can be seen that power rate reduction rate is present hot and cold water temperature during heat storage to be maximum. For example, the electricity rate reduction rate when the air conditioning load is 50 W / m ² is maximized when the cold / hot water temperature during heat storage is 11 ° C. as described above.

FIG. 8 is a diagram illustrating an example of the relationship between the cold / hot water temperature and the system COP during heat storage in the cooling operation mode. 8, in each of the air conditioning load ^{30W / m 2, 50W / m} 2, 70W / m 2, 90W / m 2, it can be seen that the cold water temperature at the time of heat storage system COP is maximum exists. For example, the system COP when the air conditioning load is 50 W / m ² has a maximum value of 6.0 when the temperature of cold / hot water during heat storage is 17 ° C.

The power rate reduction rate and the system COP are not always compatible. For example, if the cold / hot water temperature at the time of heat storage is 11 ° C. when the air conditioning load is 50 W / m ² , the electricity charge reduction rate is maximized, but the system COP is reduced from the maximum 6.0 to 5.0. End up. On the other hand, if the cold / hot water temperature during heat storage is 17 ° C. when the air conditioning load is 50 W / m ² , the system COP is maximized, but the power rate reduction rate is reduced from the maximum 22% to 15%. .

  FIG. 9 is an example of the first control information 411a showing the relationship between the cold / hot water temperature and the air load at the time of heat storage that maximizes the electricity rate reduction rate. In FIG. 9, the broken line is the one in the cooling operation mode based on FIG. In the heating operation mode indicated by the solid line in FIG. 9, similarly to FIG. 7, it can be similarly obtained from the peak value of the graph showing the relationship between the cold / hot water temperature during heat storage and the power rate reduction rate. FIG. 10 is an example of the second control information 411b indicating the relationship between the cold / hot water temperature and the air load at the time of heat storage at which the system COP is maximized. In FIG. 10, a broken line is a thing at the time of the cooling operation mode based on FIG. In the heating operation mode indicated by the solid line in FIG. 10, similarly to FIG. 8, it can be similarly obtained from the peak value of the graph showing the relationship between the cold / hot water temperature during heat storage and the system COP.

(Air conditioning system operation)
Next, an example of the operation of the air conditioning system 1 will be described.

(1) Daytime in the cooling operation mode When the user selects the cooling operation mode on the operation mode selection screen for the air conditioning time zone displayed on the operation display unit 42 and selects the target temperature of the room temperature, the room temperature setting unit 402 Sets the cooling operation mode and the target room temperature (set temperature) for the heat source unit 3. Further, it is assumed that the user selects the cost saving mode on the operation mode selection screen for the heat storage time zone displayed on the operation display unit 42.

  The heat source unit 3 supplies a heat medium cooled to a predetermined temperature (for example, 19 ° C.) corresponding to the cooling operation mode in the initial period of the daytime air conditioning time period (for example, 8:00 to 18:00). It is supplied to the heat transfer tube 22 via the line 31. In the subsequent air-conditioning time zone (for example, 8:00 to 18:00), the heat source device 3 keeps the room temperature detected by the temperature sensor 5 around the temperature (set temperature) set by the control device 4. Then, the heat medium is cooled and supplied to the heat transfer tube 22 via the supply line 31.

  While the heat medium supplied to the heat transfer tube 22 passes through the heat transfer tube 22, heat exchange with the panel body 20 is performed, and the surface 20b of the panel body 2 serves as a radiation surface to perform radiation air conditioning.

(2) Nighttime in the cooling operation mode When the daytime air conditioning time zone passes and the air conditioning stop time zone (for example, 18:00 to 22:00) is reached, the air conditioning load calculation unit 400 performs the daytime air conditioning time zone (for example, 8 : 18:00 to 18:00), the air conditioning load during the day is calculated from the amount of power used by the heat source unit 3 and the like.

  In the water temperature setting unit 401, since the user operates the operation display unit 42 and the cost saving mode is selected, the air conditioning load calculated by the air conditioning load calculation unit 400 from the first control information 411a corresponding to the cost saving mode is selected. The cold / hot water temperature (for example, 17 degreeC) at the time of the thermal storage corresponding to is acquired, and the temperature is set with respect to the heat source unit 3.

  When it becomes the night heat storage time zone (for example, 22:00 to 8:00), the heat source unit 3 supplies water cooled to the cold / warm water temperature (for example, 17 ° C.) at the time of heat storage set by the water temperature setting unit 401. It is supplied to the heat transfer tube 22 via the line 31.

  The water temperature setting unit 401 is calculated by the air conditioning load calculating unit 400 from the second control information 411b corresponding to the energy saving mode when the user operates the operation display unit 42 and the energy saving mode is selected. The cold / hot water temperature (for example, 17 degreeC) at the time of the thermal storage corresponding to an air-conditioning load is acquired, and the temperature is set with respect to the heat-source equipment 3.

(3) Daytime in the heating operation mode When the user selects the heating operation mode on the operation mode selection screen for the air conditioning time zone displayed on the operation display unit 42 and selects the temperature that is the target of the room temperature, the temperature setting unit 402 Sets the heating operation mode and the target room temperature (set temperature) for the heat source unit 3. Further, it is assumed that the user selects the cost saving mode on the operation mode selection screen for the heat storage time zone displayed on the operation display unit 42.

  The heat source unit 3 supplies a heating medium heated to a predetermined temperature (for example, 22 ° C.) corresponding to the heating operation mode in the initial daytime air conditioning time period (for example, 8:00 to 18:00). It is supplied to the heat transfer tube 22 via the line 31. In the subsequent air-conditioning time zone (for example, 8:00 to 18:00), the heat source device 3 keeps the room temperature detected by the temperature sensor 5 around the temperature (set temperature) set by the control device 4. Then, the heat medium is heated and supplied to the heat transfer tube 22 via the supply line 31.

  While the heat medium supplied to the heat transfer tube 22 passes through the heat transfer tube 22, heat exchange with the panel body 20 is performed, and the surface 20b of the panel body 2 serves as a radiation surface to perform radiation air conditioning.

(4) Nighttime in heating operation mode When the daytime air conditioning time zone passes and the air conditioning stop time zone (for example, 18:00 to 22:00) is reached, the air conditioning load calculation unit 400 sets the daytime air conditioning time zone (for example, 8 : 18:00 to 18:00).

  In the water temperature setting unit 401, since the user operates the operation display unit 42 and the cost saving mode is selected, the air conditioning load calculated by the air conditioning load calculation unit 400 from the first control information 411a corresponding to the cost saving mode is selected. The cold / hot water temperature (for example, 24 degreeC) at the time of the thermal storage corresponding to is acquired, and the temperature is set with respect to the heat source unit 3.

  When it becomes a night heat storage time zone (for example, 22:00 to 8:00), the heat source unit 3 uses a heat medium heated to a cold / warm water temperature (for example, 24 ° C.) at the time of heat storage set by the water temperature setting unit 401. The heat transfer tube 22 is supplied via the supply line 31.

  The water temperature setting unit 401 is calculated by the air conditioning load calculating unit 400 from the second control information 411b corresponding to the energy saving mode when the user operates the operation display unit 42 and the energy saving mode is selected. The cold / hot water temperature (for example, 24 degreeC) at the time of the thermal storage corresponding to an air-conditioning load is acquired, and the temperature is set with respect to the heat-source equipment 3.

(Effect of this embodiment)
According to the present embodiment, the following effects can be obtained.
(1) When a space is provided between the slab 130 on the ceiling side and the radiation panel 2 is laid on the ceiling, not only the radiation to the room but also the ceiling from the panel body 20 and the heat transfer tube 22 during operation of the radiation panel 2. Since radiation is also applied to the slab 130 on the side, heat can be stored in the slab 130 on the ceiling side at night, and the heat stored in the slab 130 can be used for radiant air conditioning in the room during the day.
(2) Since the nighttime water temperature is set according to the daytime air conditioning load on that day, it is possible to set the temperature of the heat storage time zone corresponding to the air conditioning load that changes daily.
(3) The system 1 can be operated in the cost saving mode or the energy saving mode according to the user's selection.

[Other embodiments]
The embodiment of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. For example, in the above embodiment, the control device 4 sets the temperature of the heat medium supplied to the heat transfer tube 22 at night with respect to the heat source unit 3, but the control device 4 displays the temperature of the heat medium to be set on the operation display unit. The temperature may be set for the heat source unit 3 based on the temperature of the heat medium to be set displayed on the operation display unit 42 by the operator.

  In the above embodiment, the cost saving mode and the energy saving mode can be selected, but only one of them may be implemented.

  In addition, an air circulation passage that communicates the space between the radiation panel 2 and the ceiling-side slab 130 and the room 110 is provided, and heat radiated from the slab 130 is conveyed to the room 110 by the air flowing through the space during the air-conditioning time period. You may do it. Thereby, the heat storage of the slab 130 can be further utilized.

  Furthermore, a blower may be installed in the space between the radiation panel 2 and the slab 130 on the ceiling side, and the air in the space may be blown into the room 110 during the air conditioning time period. Thereby, the heat storage of the slab 130 can be further utilized.

  In the above embodiment, the temperature of the surface of the radiant panel is controlled by supplying the heat transfer tube (water) to the heat transfer tube. However, in the present invention, the temperature of the surface of the radiant panel is controlled by blowing a heat medium by air onto the radiant panel. It can also be applied to control.

DESCRIPTION OF SYMBOLS 1 ... Air conditioning system, 2 ... Radiation panel, 3 ... Heat source machine, 4 ... Control apparatus,
5 ... temperature sensor, 20 ... panel body, 20a ... back surface, 20b ... front surface,
21 ... Heat transfer holding member, 22 ... Heat transfer tube, 31 ... Supply line, 32 ... Return line,
40 ... control unit, 41 ... storage unit, 42 ... operation display unit, 100 ... building, 110 ... indoor,
111 ... electric product, 120 ... wall, 130 ... slab, 130a ... bottom surface,
400: Air conditioning load calculation unit 401: Water temperature setting unit 402: Room temperature setting unit,
410: Program, 411a: First control information, 411b: Second control information

Claims (4)

A heat medium heated or cooled to a predetermined temperature is supplied to a heat transfer tube arranged on the back side of the radiant panel main body arranged so as to form a ceiling surface by providing a space between the heat storage body on the ceiling side A control device for controlling the heat source device,
Calculating means for calculating an air conditioning load generated in the room during a predetermined period;
First relationship information indicating the relationship between the air conditioning load and the temperature of the heat medium having the highest power rate reduction rate, and a second relationship indicating the relationship between the air conditioning load and the temperature of the heat medium having the highest coefficient of performance of the heat source device Storage means for storing relationship information;
Selecting means for selecting the first relation information or the second relation information;
And output means said calculating means the temperature of the heat medium corresponding to the air conditioning load calculated to acquire outputs from said first relationship information or the second related information selected by the selecting means,
Control device.   The control device according to claim 1, wherein the heat source device is controlled to supply a heat medium having a temperature of the heat medium output from the output unit to the heat transfer tube. The calculation means calculates the air conditioning load generated in the room during the daytime,
The output means outputs the temperature of the heat medium supplied to the heat transfer tube at night,
The control device according to claim 1 or 2 . A radiant panel main body arranged to form a ceiling surface by providing a space between the heat storage body on the ceiling side,
A heat transfer tube disposed on the back side of the radiation panel body;
A heat source device for supplying a heat medium heated or cooled to a predetermined temperature to the heat transfer tube;
Calculating means for calculating an air conditioning load generated in the room during a predetermined period; first relationship information indicating a relationship between the air conditioning load and the temperature of the heat medium having the highest power charge reduction rate; and the air conditioning load and the heat source device Storage means for storing second relation information indicating a relation with the temperature of the heat medium having the highest coefficient of performance, selection means for selecting the first relation information or the second relation information, and the calculation means; the temperature of the heat medium corresponding to the calculated the air conditioning load, a control unit and an output means for outputting the acquired from the selected first relation information or the second related information by said selecting means,
Air conditioning system with

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