JP5054615B2 - Air conditioning control device and air conditioning control method - Google Patents

Description

  The present invention relates to an air conditioning control device and an air conditioning control method in an air conditioning system including a plurality of heat exchangers such as an FCU.

  In an air conditioning system disposed in a house or a building, a fan coil unit (FCU) is often used as a heat exchanger. This FCU causes a heat medium whose temperature is adjusted by a heat source to flow inside the coil to exchange heat between the air outside the coil and the heat medium, and blows the air after the heat exchange to the outside by a fan. Is. Therefore, the FCU can realize a stable operation by stably supplying the heat medium. For this reason, conventionally, a constant flow valve has been used in a pipeline for supplying a heat medium to the FCU (see, for example, Patent Documents 1 and 2).

Japanese Patent Laid-Open No. 10-176858 JP-A-10-185281

  However, in the conventional system, when the constant flow valve is fully opened, the heat medium flows excessively, so that there is no temperature difference between the inlet and outlet of the FCU, and the operating efficiency of the air conditioning system is poor. If a fixed flow valve is provided in each FCU or valve control is performed based on the return temperature in order to eliminate this state, the number of fixed flow valves and the number of return temperature control loops increase as the number of FCUs increases. Therefore, it was expensive.

  Therefore, the present invention has been made to solve the above-described problems, and an object thereof is to provide an air conditioning control device and an air conditioning control method that can improve the operation efficiency by a simpler method. .

  In order to solve the problems as described above, a heat medium received from a heat source is supplied, and a plurality of heat exchangers for exchanging heat between the heat medium and ambient air are provided in each of the heat exchangers. An air-conditioning control apparatus in an air-conditioning system including a valve that controls supply of a heat medium to a heat exchanger, the acquisition means for acquiring all the flow rates of the heat medium supplied to the heat exchanger, and the capacity of each heat exchanger Storage means for storing, calculation means for calculating the number of heat exchangers to which the heat medium should be supplied, based on the flow rate acquired by the acquisition means and the respective capacities of the heat exchangers stored in the storage means, and the calculation Control means for controlling opening and closing of the valve based on the number calculated by the means and the number of heat exchangers to which the heat medium is currently supplied is provided.

  In the above air conditioning control device, when the number of heat exchangers to which the heat medium is currently supplied is larger than the number calculated by the calculation means, the control means closes a predetermined valve that has been opened, and the calculation means When the number of heat exchangers to which the heat medium is currently supplied is smaller than the calculated number, the predetermined valve that has been closed may be opened.

  The air-conditioning control method according to the present invention is provided for each of the heat exchangers that receive the supply of the heat medium received from the heat source and exchange heat between the heat medium and the surrounding air. An air conditioning control method in an air conditioning system including a valve for controlling supply of a heat medium to a heat exchanger, the acquisition step for obtaining all the flow rates of the heat medium supplied to the heat exchanger, and the capacity of each heat exchanger A calculation step for calculating the number of heat exchangers to which the heat medium is to be supplied based on the storage step for storing, the flow rate acquired in the acquisition step, and the respective capacities of the heat exchangers stored in the storage step, and this calculation Based on the number calculated in the step and the number of heat exchangers currently supplied with the heat medium, the valves corresponding to the heat exchanger supplying the heat medium are opened and closed. And having a Gosuru control step.

  According to the present invention, the number of heat exchangers to which the heat medium is to be supplied is calculated based on the flow rate of all the heat mediums sent to the heat exchanger and the capacity of the heat exchanger, and the calculated number of operating units and the current operating number are calculated. By controlling the opening and closing of the valve based on the number of heat exchangers, the heat medium is supplied to the heat exchanger of the quantity corresponding to the flow rate of the heat medium, and the heat medium with an appropriate flow rate is sent to each heat exchanger. As a result, the driving efficiency can be improved.

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

[Configuration of air conditioning control system]
As shown in FIG. 1, the air conditioning control system according to the present embodiment includes a heat source 1 that adjusts the temperature by heating or cooling a heat medium such as water or antifreeze, and heat that has been adjusted by the heat source. A plurality of FCUs 2a to 2n that exchange heat with the medium, an outward path 3 that supplies the heat medium from the heat source 1 to the FCUs 2a to 2n, a return path 4 that returns the heat medium exchanged by the FCUs 2a to 2n to the heat source 1, and an outward path 3 And a control valve 5 for measuring the flow rate of the heat medium flowing in the forward path 3 and controlling the flow rate of the heat medium, valves 6a to 6n provided for the FCUs 2a to 2n, and a controller 7.

  Here, the outward path 3 includes an outward path main pipe 31 and forward path branch pipes 32a to 32n. The forward path main pipe 31 has one end connected to the heat source 1 and the other end connected to the forward path branch pipes 32a to 32n. The forward path branch pipes 32a to 32n have one end connected to the forward path main pipe 31 and the other end connected to the corresponding FCUs 2a to 2n. . The control valve 5 is provided in the outward main pipe 31 of the outward path 3 and adjusts the flow rate of the heat medium supplied to the entire FCUs 2a to 2n.

  The return path 4 includes a return path main pipe 41 and return path branch pipes 42a to 42n. One end of the return path main pipe 41 is connected to the heat source 1 and the other end is connected to the return path branch pipes 42a to 42n. The return path branch pipes 42a to 42n are connected to the corresponding FCUs 2a to 2n and the other end is connected to the return path main pipe 42. It is connected. The valves 6a to 6n are provided in the return path branch pipes 42a to 42n, and control the flow rate of the heat medium flowing through the corresponding FCUs 2a to 2n.

  The controller 7 drives the heat source 1, drives the FCUs 2 a to 2 n, opens the control valve 5, and opens the valves 6 a to 6 n based on a user operation input, a set temperature of a region where the FCUs 2 a to 2 n are arranged, or the like. Is to control. In particular, in the present embodiment, the opening and closing of the valves 6a to 6n is controlled based on the flow rate of the heat medium supplied to the entire FCUs 2a to 2n. Such a controller 7 includes an input unit 71, a flow rate measurement unit 72, a storage unit 73, a main control unit 74, and an instruction unit 75.

  The input unit 71 detects an operation input such as a set temperature from a user or the like. The detected operation input is sent to the main control unit 74.

  The flow rate measurement unit 72 acquires the measurement result of the flow rate of the heat medium flowing through the forward main pipe 31 from the control valve 5, that is, the flow rate of all the heat media flowing through the FCUs 2a to 2n. This measurement result is sent to the main control unit 74.

  The storage unit 73 includes information relating to the capacity of the heat source 1 such as the amount of heat that can be generated, information relating to the capacity of the FCUs 2a to 2n such as the flow rate of the heat medium required for operation, the diameter and length of the coil, and the amount of heat generation, FCUs 2a to 2n, 5 and operation signals of the valves 6a to 6n are stored.

  Based on the operation input received from the input unit 71, the measurement result received from the flow rate measuring unit 72, and the information on the heat source 1 and the capacities of the FCUs 2a to 2n stored in the storage unit 73, the main control unit 74 ~ 2n, the control valve 5 and the valves 6a to 6n are operated to control the respective components of the air conditioning control system according to the present embodiment by generating an operation signal for operating or opening / closing the control signal. . In particular, in the present embodiment, based on the measurement result received from the flow rate measurement unit 72 and the information on the heat source 1 and the capacity of the FCUs 2a to 2n stored in the storage unit 73, an operation signal for controlling the opening and closing of the valves 6a to 6n. Is generated. Such a main control unit 74 is an operation control unit 74a that controls the operation of each device of the air conditioning control system, and the number of units that calculates the appropriate number of FCUs 2a to 2n based on the measurement results from the flow rate detection unit 72. A control unit 74b and a valve control unit 74c that compares the calculation result of the number main control unit 74b with the current operation number of the FCUs 2a to 2n and instructs opening / closing of the valves 6a to 6n are provided.

  The instruction unit 75 sends the operation signal generated by the main control unit 74 to the heat source 1, the FCUs 2a to 2n, the control valve 5 and the valves 6a to 6n.

  The controller 7 includes an arithmetic device such as a CPU, a storage device such as a memory and an HDD (Hard Disc Drive), and an input device that detects input of information from the outside such as a keyboard, a mouse, a pointing device, a button, and a touch panel. An I / F device that transmits and receives various information via a communication line such as the Internet, a LAN (Local Area Network), a WAN (Wide Area Network), etc., and a CRT (Cathode Ray Tube), LCD (Liquid Crystal Display) or The computer includes a display device such as a field emission display (FED) and a program installed in the computer. That is, the hardware device and the software cooperate to control the above hardware resources by a program, and the above-described input unit 71, flow rate measurement unit 72, storage unit 73, main control unit 74, and instruction unit 75 are realized. Is done. Note that the program may be provided in a state of being recorded on a recording medium such as a flexible disk, a CD-ROM, a DVD-ROM, or a memory card.

[Operation of air conditioning control system]
Next, the operation of the entire air conditioning control system according to the present embodiment will be described.

  The input unit 71 receives a new temperature setting for a region where the FCUs 2a to 2n are arranged, a request for heating or cooling operation by the FCUs 2a to 2n for the region, or a set temperature and an actual temperature of the region from the user or the like. An operation input such as a difference detection is detected. When such an operation input is detected, the main control unit 74 causes the operation control unit 74a to perform an operation signal indicating that the cooling operation or the heating operation is performed on the heat source 1 based on the operation input, and an adjustment. An operation signal for opening the valve 5 and the valves 6a to 6n is generated. These operation signals are sent to the heat source 1, the regulating valve 5, and the valves 6a to 6n by the instruction unit 75.

  When receiving the operation signal, the heat source 1 generates a heat medium having a predetermined temperature based on the operation signal and sends it to the forward path 3. The temperature of the heat medium to be generated is set based on a temperature set value by a user operation input, the temperature of the area where the FCUs 2a to 2n are installed, the capacity of the FCUs 2a to 2n, and the like.

  The heat medium received by the heat source 1 is sent from the heat source 1 by a pump (not shown), passes through the forward main pipe 31 and the forward branch pipes 32a to 32n, and is input to the FCUs 2a to 2n. In these FCUs 2a to 2n, heat is exchanged between the heat medium passing through the inside of the coils of the FCUs 2a to 2n and the ambient air outside the coils, and the air is sent out by a fan, whereby the FCUs 2a to 2n are arranged. Is supplied with warm air or cold air.

  The heat medium subjected to heat exchange by the FCUs 2a to 2n passes through the return path branch pipes 42a to 42n and the return path main pipe 41 and reaches the heat source 1 again. By repeating such circulation of the heat medium, air conditioning in the area where the FCUs 2a to 2n are arranged is controlled.

<Unit control operation>
Next, with reference to FIG. 3, the control operation of the number of operating FCUs 2a to 2n in the air conditioning control system according to the present embodiment will be described.

  In a state where the heat source 1 is operating and a heat medium having a predetermined temperature and flow rate is supplied to the FCUs 2a to 2n, the controller 7 causes the flow rate measurement unit 72 to flow the heat medium flowing through the forward main pipe 31 of the forward route 3. Is obtained (step S1). As described above, the control valve 5 is provided with a flow rate measurement function. The heat medium flowing through the forward main pipe 31 provided with the control valve 5 is sent to the forward branch pipes 32a to 32n. Therefore, measuring the flow rate of the heat medium passing through the forward path main pipe 31 measures the flow rate of the heat medium flowing through the entire FCUs 2a to 2n. Therefore, in the present embodiment, the flow rate measurement unit 72 acquires the flow rate of the heat medium flowing through the forward main pipe 31 of the forward path 3 by acquiring the measurement result of the control valve 5.

  Note that the flow rate of the heat medium flowing through the forward main pipe 31 of the forward path 3 is set by the amount of heat required by the FCUs 2a to 2n. That is, the flow rate of the heat medium flowing through the forward main pipe 31 of the forward path 3 is set by converting the amount of heat necessary for setting the region where the FCUs 2a to 2n are set to the set temperature into the flow rate.

  When the flow rate of the heat medium passing through the outward main pipe 31 is acquired, the main control unit 74 calculates the optimum number of FCUs 2a to 2n for the flow rate by the number calculation unit 74b (step S2). This calculation is performed based on the flow rate of the heat medium passing through the forward path main pipe 31 and the capacities of the FCUs 2a to 2n stored in the storage unit 73. Here, the optimal operating number of FCUs 2a to 2n means the number of FCUs 2a to 2n when the heat exchange efficiency is optimal in the FCUs 2a to 2n to which the heat medium is supplied. Such calculation of the optimum number of operating units is performed, for example, by previously providing a table showing the relationship between the flow rate of the heat medium passing through the outward path main pipe 31 and the number of operating units of the FCUs 2a to 2n, and calculating based on this table. Also good. In addition, when the capacity | capacitance of FCU2a-2n differs, the flow volume measured according to the capacity | capacitance of each FCU2a-2n is distributed so that it may not become an excessive flow volume to each FCU2a-2n.

  When the operation number of FCUs 2a to 2n is calculated, the main control unit 74 compares the calculated operation number of FCUs 2a to 2n with the current operation number of FCUs 2a to 2n by the valve control unit 74c. The opening / closing of 6a to 6n is controlled (step S3). Here, the valve control unit 74c can detect the currently operating FCUs 2a to 2n based on the open / closed states of the valves 6a to 6n.

  When the number of currently operating FCUs 2a to 2n is larger than the calculation result (step S3: the current number is larger), the valve control unit 74c generates an operation signal to selectively close the valves 6a to 6n. Then, the operation signal is sent to the corresponding valves 6a to 6n by the instruction unit 75 (step S4). Accordingly, the valves 6a to 6n that have received the operation signal are closed, and the FCUs 2a to 2n corresponding to the closed valves 6a to 6n stop the operation.

  If the flow rate of the heat medium is small with respect to the number of operating units of FCUs 2a to 2n, the number of operating units will be excessive, and FCUs 2a to 2n that do not supply the required amount of heat medium will appear, and the efficiency of heat exchange will not be optimal in these FCUs 2a to 2n. As a result, the operating efficiency of the air conditioning system is deteriorated. Therefore, in this embodiment, when the number of FCUs 2a to 2n currently in operation is larger than the calculation result, the extra valves 6a to 6n are closed to reduce the number of FCUs 2a to 2n. Thereby, since the heat medium having a flow rate that optimizes the heat exchange efficiency is sent to each of the operating FCUs 2a to 2n, an appropriate operation of the FCUs 2a to 2n according to the flow rate of the heat medium can be realized. . Note that the valves 6a to 6n to be closed are appropriately determined based on the difference between the calculation result and the number of operating FCUs 2a to 2n.

  When the number of currently operating FCUs 2a to 2n is smaller than the calculation result (step S3: the current number is small), the valve control unit 74c performs an operation for selectively opening the closed valves 6a to 6n. A signal is generated, and the operation signal is sent to the corresponding valves 6a to 6n by the instruction unit 75 (step S5). Accordingly, the valves 6a to 6n that have received the operation signal are opened, and the FCUs 2a to 2n corresponding to the opened valves 6a to 6n start operation.

  If the flow rate of the heat medium is large relative to the number of operating units of the FCUs 2a to 2n, the flow rate will be excessive and the temperature difference of the heat medium will not occur, and the efficiency of heat exchange will deteriorate in the FCUs 2a to 2n. Becomes worse. Therefore, in this embodiment, when the number of FCUs 2a to 2n currently in operation is smaller than the calculation result, the closed valves 6a to 6n are selectively opened to increase the number of operating FCUs 2a to 2n. As a result, since the heat medium having a flow rate that optimizes the heat exchange efficiency is supplied to each of the operating FCUs 2a to 2n, an appropriate operation is possible, and as a result, the operation efficiency of the air conditioning control system is improved. be able to. Note that the valves 6a to 6n to be opened are appropriately determined based on the difference between the calculation result and the number of operating FCUs 2a to 2n.

  When the calculation result and the number of operating FCUs 2a to 2n currently operating are the same (step S3: the same), the valve control unit 74c maintains the current operating state of the FCUs 2a to 2n, that is, any of the valves 6a to 6n. No operation is performed (step S6). When the calculation result is equal to the number of operating units of FCUs 2a to 2n, the valve control unit 74c relates to opening and closing of the valves 6a to 6n, assuming that an appropriate amount of heat medium is sent to each operating FCU 2a to 2n. Maintain the current driving situation without generating driving signal. Thereby, it becomes possible to continue an appropriate driving | operation and, as a result, the operating efficiency of an air-conditioning control system can be improved.

  As described above, according to the present embodiment, the number calculation unit 74b uses the flow rates of all the heat media sent to the FCUs 2a to 2n and the capabilities of the FCUs 2a to 2n to correspond to the flow rates of the FCUs 2a to 2n is calculated, and the valve control unit 74c controls the opening and closing of the valves 6a to 6n based on the calculated number of operated units and the number of FCUs 2a to 2n that are currently in operation. Since the heat medium can be sent to the corresponding number of FCUs 2a to 2n and the heat medium having a flow rate that optimizes the heat exchange efficiency can be supplied to each of the FCUs 2a to 2n, as a result, the operation efficiency can be improved. Can do.

  The present invention can be applied to various air conditioning systems having a plurality of heat exchangers.

It is a figure which shows the structure of the air conditioning system which concerns on this invention. It is a figure which shows the structure of a controller. It is a flowchart explaining the flow control operation.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Heat source, 2a-2n ... FCU, 3 ... Outbound path, 4 ... Return path, 5 ... Control valve, 6a-6n ... Valve, 7 ... Controller, 31 ... Outbound main pipe, 32a-32n ... Outbound branch pipe, 41 ... Return path Main pipes, 42a to 42n ... return branch pipes, 71 ... input units, 72 ... flow rate measuring units, 73 ... storage units, 74 ... main control units, 74a ... operation control units, 74b ... number calculation units, 74c ... valve control units, 75: Instruction unit.

Claims (3)

Controls supply of the heat medium to a plurality of heat exchangers that receive supply of the heat medium received from the heat source and exchange heat between the heat medium and ambient air, and to the corresponding heat exchangers provided in each of the heat exchangers An air conditioning control device in an air conditioning system comprising a plurality of valves,
Acquisition means for acquiring all flow rates of the heat medium supplied to the heat exchanger;
Storage means for storing the capacity of each of the heat exchangers;
Calculation means for calculating the number of the heat exchangers to which the heat medium is to be supplied based on the flow rate acquired by the acquisition means and the respective capacities of the heat exchangers stored in the storage means;
An air-conditioning control apparatus comprising: control means for controlling opening and closing of the valve based on the number calculated by the calculation means and the number of the heat exchangers to which the heat medium is currently supplied . The control means includes
When the number of the heat exchangers currently supplied with the heat medium is larger than the number calculated by the calculation means, close the predetermined valve that has been opened,
The predetermined valve that has been closed is opened when the number of the heat exchangers to which the heat medium is currently supplied is smaller than the number calculated by the calculating means. Air conditioning control system. Controls supply of the heat medium to a plurality of heat exchangers that receive supply of the heat medium received from the heat source and exchange heat between the heat medium and ambient air, and to the corresponding heat exchangers provided in each of the heat exchangers An air conditioning control method in an air conditioning system comprising a valve
An acquisition step of acquiring all the flow rates of the heat medium supplied to the heat exchanger;
A storage step of storing a capacity of each of the heat exchangers;
A calculation step of calculating the number of the heat exchangers to which the heat medium is to be supplied, based on the flow rate acquired in the acquisition step and the respective capacities of the heat exchangers stored in the storage step;
An air conditioning control method comprising: a control step of controlling opening and closing of the valve based on the number calculated in this calculation step and the number of the heat exchangers to which the heat medium is currently supplied.

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