JP2015206568A - Air-conditioning system and control method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-conditioning system and a control method for the same capable of reducing water conveyance power and heat loss.SOLUTION: An air-conditioning system 10 comprises a circulation circuit 20 which supplies air-conditioning water heated or cooled by a heat exchanger 12 where cooling water or hot water flows therein to air-conditioning means 16 through inlet piping 14 and returns the air-conditioning water flowing out of the air-conditioning means 16 to the heat exchanger 12 through outlet piping 18. The air-conditioning system 10 also has: a heat quantity controller 22 which controls a flow rate of the cooling water or the hot water at a primary side of the heat exchanger 12; and a flow rate controller 24 which controls the flow rate of the air-conditioning water in the circulation circuit 20.

Description

  The present invention relates to an air conditioning system such as a radiant panel air conditioning system that performs heat exchange with cold / hot water, and a control method for the air conditioning system.

  Conventionally, air-conditioning systems, such as a radiation panel air-conditioning system which performs heat exchange by cold / hot water, are known (for example, refer to patent documents 1 and 2). As shown in FIGS. 7 and 8, a conventional general radiant panel air conditioning system includes a water pump 4 and a control valve 5 in a pipe 3 of the radiant panel 2 installed in the ceiling of the room 1 to be air-conditioned. In this way, cold water flows in the cooling period and warm water flows in the heating period, so that the room temperature is controlled from the heat transfer phenomenon due to radiation (radiant heat) from the radiant panel. Here, as shown in FIG. 8, the pipe 3 of the radiating panel 2 and the primary heat source are connected via a heat exchanger 6. The water supply pump 7 and the control valve 8 on the primary side of the heat exchanger 6 are controlled at a constant output or separately.

  In this system, for example, in order to obtain a desired cooling capacity in the cooling period, the controller 9 adjusts the flow rate by controlling the output of the water pump 4 and the opening of the control valve 5 based on the room temperature. In the same control method as an air-conditioning system using a commonly used AHU (air handling unit), the flow rate is simply increased when the room temperature is higher than the set temperature, and the flow rate is limited when the room temperature falls below the set temperature. Behave or stop. In other words, this control method does not necessarily cooperate with the operation of the heat exchanger 6.

  Here, the net cooling capacity of the radiant panel air conditioning system is determined based on the product of the temperature difference ΔT and the flow rate F of the flowing water at the pipe inlet and outlet as shown in the following equation and FIG.

Cooling capacity [kW] = α × (flow water inlet / outlet temperature difference ΔT [° C.]) × (flow rate F [l / h])
Here, α is a unit conversion coefficient [kW / (kcal / h)].

  As shown in FIG. 9, the water temperature in the piping is mainly affected by the capacity of the heat exchanger 6 (primary side water temperature and flow rate), and the outlet temperature is influenced by the room temperature.

  Here, in the conventional control based on room temperature, the flow rate is determined regardless of the state of the water temperature in the pipe. Now, at the start of air conditioning, etc., the room temperature and the operation on the primary side of the heat exchanger are not stable, that is, when the inlet and outlet temperatures of the pipes have not reached the set values, or the temperature difference between the inlet and outlet temperatures is designed Assuming the case where the value is less than the value, under the conventional control, there is a possibility that the flow rate becomes excessive and excessive water pump power is consumed or the air conditioning capacity cannot be sufficiently extracted. In addition, the behavioral instability of the heat exchanger is promoted, and there is a possibility that other air conditioning systems sharing the primary heat source will be adversely affected, or that heat loss may be caused by a reduction in the efficiency of the heat source. This will be described with reference to FIG.

  As shown in FIG. 10 (1), the water pump power is constant when the flow rate is constant in a state where the room temperature and the operation on the primary side of the heat exchanger are not stable, such as at the start of air conditioning. When saturated, more power than necessary is consumed. Further, as shown in FIGS. 10 (2) and (3), when the amount of heat to be removed fluctuates, the performance of the heat exchanger is destabilized and the water supply temperature is destabilized.

JP 2004-233023 A JP 2012-247110 A

  For this reason, the technique which can eliminate the problem mentioned above and can fully demonstrate the potential which an air-conditioning system has without waste was calculated | required.

  This invention is made | formed in view of the above, Comprising: It aims at providing the control method of an air-conditioning system and an air-conditioning system which can aim at reduction of water supply power and heat loss.

  In order to solve the above-described problems and achieve the object, an air conditioning system according to the present invention supplies temperature-controlled water heated or cooled by a heat exchanger through which cold water or hot water flows to an air-conditioning means via an inlet pipe. And a heat quantity controller for controlling a flow rate of cold water or hot water on a primary side of the heat exchanger in an air conditioning system having a circulation circuit for flowing the temperature-controlled water flowing out from the air-conditioning means to the heat exchanger via an outlet pipe; And a flow rate controller for controlling the flow rate of the temperature-controlled water in the circulation circuit.

  In the air conditioning system according to the present invention, in the above-described invention, the flow rate controller measures the temperature difference between the temperature control water inlet temperature of the inlet pipe and the temperature control water outlet temperature of the outlet pipe. A measurement unit, a determination unit that determines a variation tendency of the temperature difference by comparing a current temperature difference measured by the measurement unit and a predetermined temperature difference measured before that, and a determination by the determination unit And a control unit for controlling the flow rate of the temperature-controlled water in the circulation circuit.

  According to another air conditioning system of the present invention, in the above-described invention, the heat quantity controller includes a measuring unit that measures a preset temperature preset in the air conditioning unit and a current temperature of the air conditioning target space, and the measuring unit. And a controller that controls a flow rate of cold water or hot water on a primary side of the heat exchanger based on the measured set temperature and the current temperature.

  In addition, the control method for an air conditioning system according to the present invention supplies temperature-controlled water heated or cooled by a heat exchanger through which cold water or hot water flows to the air conditioning means via an inlet pipe, and the temperature flowing out of the air conditioning means. In the control method of an air conditioning system having a circulation circuit for supplying water to the heat exchanger via an outlet pipe, the flow rate of cold water or hot water on the primary side of the heat exchanger is controlled while the temperature adjustment water of the circulation circuit It is characterized by controlling the flow rate.

  Moreover, the control method of another air conditioning system according to the present invention, in the above-described invention, measures the temperature difference between the temperature control water inlet temperature of the inlet pipe and the temperature control water outlet temperature of the outlet pipe, By comparing the measured current temperature difference with a predetermined temperature difference measured before that, the variation tendency of the temperature difference is determined, and the flow rate of the temperature-controlled water in the circulation circuit is controlled based on this determination. It is characterized by that.

  Moreover, the control method of the other air conditioning system which concerns on this invention is the above-mentioned invention. WHEREIN: Based on the preset temperature preset to the said air-conditioning means and the present temperature of air-conditioning object space, the primary side of the said heat exchanger It is characterized by controlling the flow rate of cold water or hot water.

  According to the air conditioning system of the present invention, the temperature-controlled water heated or cooled by the heat exchanger through which cold water or hot water flows is supplied to the air-conditioning means through the inlet pipe, and the temperature-controlled water flowing out of the air-conditioning means is In an air conditioning system having a circulation circuit that flows to the heat exchanger via an outlet pipe, a heat quantity controller that controls the flow rate of cold water or hot water on the primary side of the heat exchanger and the flow rate of temperature-controlled water in the circulation circuit are controlled. Therefore, the required amount of air conditioning capacity such as cooling capacity and heating capacity is adjusted by the flow rate control on the primary side of the heat exchanger by the heat quantity controller, and the flow rate of the circulation circuit that sends temperature-controlled water to the air conditioning means It is not adjusted directly by control. As a result, the operation on the primary side of the heat exchanger can be stabilized, and the power for supplying temperature-controlled water in the circulation circuit can be reduced. Therefore, it is possible to utilize the potential of the air conditioning system and to reduce water supply power and heat loss.

  According to another air conditioning system of the present invention, the flow controller includes a measuring unit that measures a temperature difference between the inlet temperature of the temperature-controlled water in the inlet pipe and the outlet temperature of the temperature-controlled water in the outlet pipe; Based on the determination by the determination unit and the determination unit for determining the variation tendency of the temperature difference by comparing the current temperature difference measured by the measurement unit and a predetermined temperature difference measured before that And a control unit that controls the flow rate of the temperature-controlled water in the circulation circuit, so that the air conditioning capability such as the cooling capability and the heating capability is adjusted according to the fluctuation tendency of the temperature difference between the inlet temperature and the outlet temperature. There is an effect that fine adjustment can be performed by controlling the flow rate of the water.

  Further, according to another air conditioning system according to the present invention, the heat quantity controller is measured by the measuring unit that measures a preset temperature preset in the air conditioning unit and the current temperature of the air-conditioning target space, and is measured by the measuring unit. Since it has a control unit for controlling the flow rate of the cold water or hot water on the primary side of the heat exchanger based on the set temperature and the current temperature, the required amount of air conditioning capacity such as cooling capacity and heating capacity was measured. Based on the set temperature and the current temperature, there is an effect that it can be adjusted by the flow rate control on the primary side of the heat exchanger by the heat quantity controller.

  Further, according to the control method for an air conditioning system according to the present invention, the temperature-controlled water heated or cooled by the heat exchanger through which cold water or hot water flows is supplied to the air-conditioning means through the inlet pipe and flows out of the air-conditioning means. In the control method of the air conditioning system having a circulation circuit for flowing the temperature-controlled water to the heat exchanger via the outlet pipe, the flow rate of the cold water or hot water on the primary side of the heat exchanger is controlled while the temperature of the circulation circuit is controlled. Since the flow rate of water conditioning is controlled, the required amount of air conditioning capacity such as cooling capacity and heating capacity is adjusted by the flow rate control on the primary side of the heat exchanger, and by the flow rate control of the circulation circuit that sends the temperature-controlled water to the air conditioning means Not adjusted directly. As a result, the operation on the primary side of the heat exchanger can be stabilized, and the power for supplying temperature-controlled water in the circulation circuit can be reduced. Therefore, it is possible to utilize the potential of the air conditioning system and to reduce water supply power and heat loss.

  Further, according to the control method of another air conditioning system according to the present invention, the temperature difference between the inlet temperature of the temperature-controlled water in the inlet pipe and the outlet temperature of the temperature-controlled water in the outlet pipe is measured and measured. By comparing the temperature difference between the temperature and the predetermined temperature difference measured before that, the fluctuation tendency of the temperature difference is determined, and based on this determination, the flow rate of the temperature-controlled water in the circulation circuit is controlled. The air conditioning capacity such as the capacity and the heating capacity can be finely adjusted by controlling the flow rate of the temperature-controlled water in the circulation circuit according to the fluctuation tendency of the temperature difference between the inlet temperature and the outlet temperature.

  Moreover, according to the control method of the other air conditioning system which concerns on this invention, based on the preset temperature preset in the said air-conditioning means and the present temperature of the air-conditioning object space, the cold water or hot water of the primary side of the said heat exchanger Therefore, the required amount of air conditioning capacity such as cooling capacity and heating capacity can be adjusted by the flow control on the primary side of the heat exchanger based on the measured set temperature and the current temperature. There is an effect.

FIG. 1 is a block diagram showing an embodiment of an air conditioning system and an air conditioning system control method according to the present invention. FIG. 2 is a flowchart of a heat quantity controller showing an embodiment of an air conditioning system and an air conditioning system control method according to the present invention. FIG. 3 is a flow chart of a flow rate controller showing an embodiment of an air conditioning system and an air conditioning system control method according to the present invention. FIG. 4 is a diagram comparing changes over time in the water supply flow rate, where (1) is for the prior art and (2) is for the present invention. FIG. 5 is a diagram comparing changes over time in air conditioning capacity (water supply temperature). (1) is a case of the prior art, and (2) is a case of the present invention. FIG. 6 is a diagram comparing changes over time in air conditioning capability (removed heat amount), where (1) is the case of the prior art and (2) is the case of the present invention. FIG. 7 is a schematic perspective view of a conventional radiant panel air conditioning system. FIG. 8 is a block diagram of a conventional radiant panel air conditioning system. FIG. 9 is a diagram for explaining factors affecting the cooling capacity of a conventional radiant panel air conditioning system. FIG. 10 is a diagram showing an example of the state of the conventional radiant panel air conditioning system at the start of air conditioning, where (1) is a change with time in the water supply flow rate, (2) is a change with time in the water supply temperature, and (3) is a removal. This is a change in the amount of heat with time.

  Embodiments of an air conditioning system and an air conditioning system control method according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

  The present invention relates to, for example, facilities for indoor air conditioning that control room temperature by heat exchange of cold / hot water, and those that perform heat exchange as part of the facility functions, The present invention relates to flow control for reducing loss.

  In addition, the present invention can be applied not only to the above-described radiant panel air conditioning system that directly transfers heat to the room, but also to any system that partially performs heat exchange using cold / hot water for purposes such as heating, cooling, and dehumidification. Hereinafter, for the sake of simplicity, the cooling panel radiant panel air conditioning system will be described as an example.

  As shown in FIG. 1, an air conditioning system 10 according to the present invention includes a temperature control water cooled by a heat exchanger 12 through which cold water flows, in a pipe (not shown) provided in a radiation panel 16 (air conditioning means) via an inlet pipe 14. It has a circulation circuit 20 that supplies the temperature-controlled water flowing out from a pipe (not shown) of the radiant panel 16 to the heat exchanger 12 through the outlet pipe 18 and includes a heat quantity controller 22 and a flow rate controller 24. .

(Heat quantity controller)
The heat quantity controller 22 controls the flow rate of the cold water on the primary side of the heat exchanger 12 via the water pump 30 and the control valve 32, and includes a measurement unit 22A and a control unit 22B.

  The measurement unit 22A measures a preset temperature preset in the air conditioning system 10 and a room temperature (current temperature) that is a space to be air-conditioned, and can be configured using, for example, an indoor sensor that measures the room temperature. The control unit 22B controls the flow rate of the cold water on the primary side of the heat exchanger 12 via the water supply pump 30 and the control valve 32 based on the set temperature and room temperature measured by the measurement unit 22A.

  Here, in the present invention, the necessary amount of the cooling capacity is adjusted by the operation on the primary side of the heat exchanger 12 by the heat quantity controller 22 and supplied to the piping provided in the radiant panel 16 and the control valve 28. Is not used directly for room temperature control.

  A control flow by the heat quantity controller 22 will be described with reference to the flowchart of FIG.

  As shown in FIG. 2, the heat quantity controller 22 acquires the set temperature by the measurement unit 22A and measures the current room temperature (step S1). Thereafter, the primary side operation of the heat exchanger 12 is determined by the control unit 22B, and the flow rate of the cold water on the primary side of the heat exchanger 12 is adjusted by adjusting the output of the water pump 30 and the valve opening of the control valve 32. Control (step S2).

  By doing in this way, the required amount of the cooling capacity can be adjusted by the flow rate control on the primary side of the heat exchanger 12 by the heat quantity controller 22 based on the measured set temperature and the current room temperature.

(Flow controller)
The flow rate controller 24 controls the flow rate of the temperature-controlled water in the circulation circuit 20 via a water pump 26 and a control valve 28 provided in the inlet pipe 14, thereby controlling the flow rate of the pipe provided in the radiation panel 16. is there. The flow controller 24 includes a measurement unit 24A, a determination unit 24B, a control unit 24C, and a storage unit 24D.

  The measurement unit 24 </ b> A measures a temperature difference between the inlet temperature of the temperature-controlled water in the inlet pipe 14 and the outlet temperature of the temperature-controlled water in the outlet pipe 18. The determination unit 24B determines the fluctuation tendency of the temperature difference by comparing the current temperature difference measured by the measurement unit 24A with a predetermined temperature difference measured before that. The control unit 24C controls the flow rate of the temperature-controlled water in the circulation circuit 20 via the water supply pump 26 and the control valve 28 based on the determination by the determination unit 24B. The storage unit 24D stores and accumulates information on the temperature difference (for example, the temperature difference measured last time) measured by the measurement unit 24A.

  A control flow by the flow rate controller 24 will be described with reference to the flowchart of FIG.

As shown in FIG. 3, first, the measurement section 24A measures the pipe inlet / outlet temperature difference ΔT (temperature difference) of running water (temperature-controlled water) at a set predetermined time interval (step S10). As this time interval, it is preferable to set a time interval that is approximately equal to or longer than the time interval in which the flowing water makes a round of the circulation circuit 20. In step S10, the temperature difference ΔT _pre (predetermined temperature difference measured before) obtained by the previous measurement is acquired from the storage unit 24D described later.

Next, in the determination unit 24B, ΔT−ΔT _pre is calculated and compared with a threshold value, and the fluctuation tendency of the temperature difference ΔT is determined according to the comparison result (step S11). More specifically, with reference to preset threshold values T _th1 and T _th2 , it is determined whether the temperature difference ΔT tends to expand, tend to decrease, or stay within a certain range. .

Here, when ΔT−ΔT _pre > T _th1 , it is determined that the temperature difference tends to increase. In this case, it means a state where the remaining cooling capacity is surplus at the current flow rate. Therefore, the determination unit 24B determines an increase in the flow rate of the circulation circuit 20, and transmits a command signal related to the increase in the flow rate to the control unit 24C (step S12).

On the other hand, when T _th2 <ΔT−ΔT _pre <T _th1 , it is determined that the temperature difference tends to stay within a certain range. In this case, it means a state where the cooling capacity possessed without excess or deficiency is exhibited at the flow rate at that time. Therefore, the determination unit 24B determines to maintain the flow rate of the circulation circuit 20, and transmits a command signal related to the flow rate maintenance to the control unit 24C as necessary (step S13).

On the other hand, if ΔT−ΔT _pre <T _th2 , it is determined that the temperature difference tends to decrease. In this case, it means a state where the flow rate at that time is excessive with respect to the required cooling capacity. Therefore, the determination unit 24B determines a decrease in the flow rate of the circulation circuit 20, and transmits a command signal related to the decrease in the flow rate to the control unit 24C (step S14).

  Next, the control unit 24C determines the output of the water pump 26 provided in the inlet pipe 14 of the circulation circuit 20 and the valve opening degree of the control valve 28 based on the command signal from the determination unit 24B. And the opening of the control valve 28 are adjusted to control the flow rate of the temperature-controlled water in the circulation circuit 20 (step S15).

After the process of step S15, the storage unit 24D calculates ΔT _pre necessary for the next measurement by the measurement unit 24A, and stores and accumulates this information (step S16). The information stored / accumulated in the storage unit 24D is read out in the process of step S10 by the measurement unit 24A. Note that as ΔT _pre described above, ΔT itself measured immediately before (previous time) or an arbitrary time average value of ΔT measured so far can be used.

  When the flow rate controller 24 executes the processing as described above, the cooling capacity can be finely adjusted by the flow rate control of the temperature-controlled water in the circulation circuit 20 according to the fluctuation tendency of the temperature difference between the inlet temperature and the outlet temperature. it can.

  4 to 6 are explanatory views of the effect of the present invention, wherein (1) shows the case of the prior art and (2) shows the case of the present invention, respectively. As shown in FIG. 4, the water supply flow rate in the present invention is not a constant flow rate as in the prior art, but is finely controlled to realize an appropriate flow rate that is not excessive or insufficient at any given time. Will be. As a result, compared with the prior art, it is possible to reduce the water supply power only in the portion indicated by hatching.

  Moreover, as shown in FIG. 5, the up-and-down fluctuation width of the water supply temperature (the outlet temperature of the circulation circuit 20 and the inlet temperature) according to the air conditioning capability of the present invention is suppressed to be smaller than that in the prior art. As a result, the water supply temperature can be stabilized as compared with the prior art.

  Further, as shown in FIG. 6, the vertical fluctuation range of the removed heat amount according to the air conditioning capability of the present invention is also suppressed to be smaller than that of the prior art and leveled in terms of time. As a result, the operation of the primary heat source is stabilized and the efficiency is improved, and the stabilization of the water supply temperature is promoted as shown in FIG. Therefore, according to the present invention, the potential of the air conditioning system can be utilized, and combined effects such as power saving of the water pump and stabilization of the operation on the primary side of the heat exchanger can be obtained.

  As described above, according to the air conditioning system 10 according to the present invention, the necessary amount of the cooling capacity is adjusted by the flow rate control on the primary side of the heat exchanger 12 by the heat quantity controller 22, and the circulation of flowing the temperature-controlled water to the radiant panel 16. It is not adjusted directly by the flow control of the circuit 20. As a result, the operation on the primary side of the heat exchanger 12 can be stabilized, and the power for supplying temperature-controlled water in the circulation circuit 20 can be reduced. Therefore, while utilizing the potential which the air-conditioning system 10 has, there exists an effect that reduction of water supply power and heat loss can be aimed at.

  Note that the present invention does not limit the control means or control method that is the basis for determining the cooling capacity of the air conditioning system, and is a model that requires on-off control and PID control derived from room temperature to estimate the state of the indoor space. It can be realized in combination with predictive control.

  As described above, according to the air conditioning system of the present invention, the temperature-controlled water heated or cooled by the heat exchanger through which cold water or hot water flows is supplied to the air-conditioning means through the inlet pipe, and the air-conditioning means In an air conditioning system having a circulation circuit for flowing out the temperature-controlled water to the heat exchanger via an outlet pipe, a heat quantity controller for controlling the flow rate of cold water or hot water on the primary side of the heat exchanger, and the temperature of the circulation circuit A flow controller for controlling the flow rate of water conditioning is provided, so the required amount of air conditioning capacity such as cooling capacity and heating capacity is adjusted by the flow rate control on the primary side of the heat exchanger by the heat quantity controller, and the temperature adjustment water is supplied to the air conditioning means. It is not directly adjusted by the flow rate control of the circulation circuit that flows. As a result, the operation on the primary side of the heat exchanger can be stabilized, and the power for supplying temperature-controlled water in the circulation circuit can be reduced. Therefore, the potential of the air conditioning system can be utilized, and water supply power and heat loss can be reduced.

  According to another air conditioning system of the present invention, the flow controller includes a measuring unit that measures a temperature difference between the inlet temperature of the temperature-controlled water in the inlet pipe and the outlet temperature of the temperature-controlled water in the outlet pipe; Based on the determination by the determination unit and the determination unit for determining the variation tendency of the temperature difference by comparing the current temperature difference measured by the measurement unit and a predetermined temperature difference measured before that And a control unit that controls the flow rate of the temperature-controlled water in the circulation circuit, so that the air conditioning capability such as the cooling capability and the heating capability is adjusted according to the fluctuation tendency of the temperature difference between the inlet temperature and the outlet temperature. Fine adjustment can be made by controlling the flow rate of the water.

  Further, according to another air conditioning system according to the present invention, the heat quantity controller is measured by the measuring unit that measures a preset temperature preset in the air conditioning unit and the current temperature of the air-conditioning target space, and is measured by the measuring unit. Since it has a control unit for controlling the flow rate of the cold water or hot water on the primary side of the heat exchanger based on the set temperature and the current temperature, the required amount of air conditioning capacity such as cooling capacity and heating capacity was measured. Based on the set temperature and the current temperature, it is possible to adjust the flow rate on the primary side of the heat exchanger by the heat quantity controller.

  Further, according to the control method for an air conditioning system according to the present invention, the temperature-controlled water heated or cooled by the heat exchanger through which cold water or hot water flows is supplied to the air-conditioning means through the inlet pipe and flows out of the air-conditioning means. In the control method of the air conditioning system having a circulation circuit for flowing the temperature-controlled water to the heat exchanger via the outlet pipe, the flow rate of the cold water or hot water on the primary side of the heat exchanger is controlled while the temperature of the circulation circuit is controlled. Since the flow rate of water conditioning is controlled, the required amount of air conditioning capacity such as cooling capacity and heating capacity is adjusted by the flow rate control on the primary side of the heat exchanger, and by the flow rate control of the circulation circuit that sends the temperature-controlled water to the air conditioning means Not adjusted directly. As a result, the operation on the primary side of the heat exchanger can be stabilized, and the power for supplying temperature-controlled water in the circulation circuit can be reduced. Therefore, the potential of the air conditioning system can be utilized, and water supply power and heat loss can be reduced.

  Further, according to the control method of another air conditioning system according to the present invention, the temperature difference between the inlet temperature of the temperature-controlled water in the inlet pipe and the outlet temperature of the temperature-controlled water in the outlet pipe is measured and measured. By comparing the temperature difference between the temperature and the predetermined temperature difference measured before that, the fluctuation tendency of the temperature difference is determined, and based on this determination, the flow rate of the temperature-controlled water in the circulation circuit is controlled. The air conditioning capability such as the capability and the heating capability can be finely adjusted by controlling the flow rate of the temperature-controlled water in the circulation circuit according to the fluctuation tendency of the temperature difference between the inlet temperature and the outlet temperature.

  Moreover, according to the control method of the other air conditioning system which concerns on this invention, based on the preset temperature preset in the said air-conditioning means and the present temperature of the air-conditioning object space, the cold water or hot water of the primary side of the said heat exchanger Therefore, the required amount of the air conditioning capability such as the cooling capability and the heating capability can be adjusted by the flow rate control on the primary side of the heat exchanger based on the measured set temperature and the current temperature.

  As described above, the air conditioning system and the method for controlling the air conditioning system according to the present invention are useful for an air conditioning system such as a radiant panel air conditioning system that performs heat exchange using cold / hot water, and in particular, maximize the potential of the air conditioning system without waste. It is suitable for reducing the power and heat loss.

DESCRIPTION OF SYMBOLS 10 Air conditioning system 12 Heat exchanger 14 Inlet piping 16 Radiation panel (air-conditioning means)
18 outlet piping 20 circulation circuit 22 heat quantity controller 22A measurement unit 22B control unit 24 flow rate controller 24A measurement unit 24B determination unit 24C control unit 24D storage unit 26, 30 water pump 28, 32 control valve

Claims (6)

Temperature-controlled water heated or cooled by a heat exchanger through which cold water or hot water flows is supplied to the air-conditioning means via the inlet pipe, and the temperature-controlled water flowing out of the air-conditioning means is supplied to the heat exchanger via the outlet pipe. In an air conditioning system having a circulating circuit to flow,
A calorific value controller for controlling the flow rate of cold water or hot water on the primary side of the heat exchanger;
An air conditioning system comprising: a flow rate controller that controls a flow rate of temperature-controlled water in the circulation circuit. The flow rate controller includes a measuring unit that measures a temperature difference between an inlet temperature of the temperature-controlled water in the inlet pipe and an outlet temperature of the temperature-controlled water in the outlet pipe;
A determination unit for determining a variation tendency of the temperature difference by comparing the current temperature difference measured by the measurement unit with a predetermined temperature difference measured before;
The air conditioning system according to claim 1, further comprising: a control unit that controls a flow rate of the temperature-controlled water in the circulation circuit based on the determination by the determination unit. The calorific value controller includes a measuring unit that measures a preset temperature set in advance in the air-conditioning unit and a current temperature of the air-conditioning target space;
The control unit according to claim 1, further comprising: a control unit configured to control a flow rate of cold water or hot water on a primary side of the heat exchanger based on a set temperature and a current temperature measured by the measurement unit. Air conditioning system. Temperature-controlled water heated or cooled by a heat exchanger through which cold water or hot water flows is supplied to the air-conditioning means via the inlet pipe, and the temperature-controlled water flowing out of the air-conditioning means is supplied to the heat exchanger via the outlet pipe. In a control method of an air conditioning system having a circulating circuit for flowing,
While controlling the flow rate of cold water or hot water on the primary side of the heat exchanger,
A method for controlling an air conditioning system, comprising controlling a flow rate of temperature-controlled water in the circulation circuit.   Measure the temperature difference between the inlet temperature of the temperature control water of the inlet pipe and the outlet temperature of the temperature control water of the outlet pipe, and compare the measured current temperature difference with the predetermined temperature difference measured before that The control method of the air-conditioning system according to claim 4, wherein a fluctuation tendency of the temperature difference is determined and the flow rate of the temperature-controlled water in the circulation circuit is controlled based on the determination.   The flow rate of cold water or hot water on the primary side of the heat exchanger is controlled based on a preset temperature preset in the air conditioning means and the current temperature of the air conditioning target space. Air conditioning system control method.

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