KR101003148B1 - Air conditioning control system and air conditioning control method - Google Patents

Abstract

Suppress the increase in energy consumption. The air conditioning control system includes pumps 9-1 and 9-2 for discharging cold and hot water, air conditioners 5-1 to 5-3 receiving cold and hot water, valves 6-1 to 6-3 for controlling the flow rate of cold and hot water, and valves. The degree of opening of the valves 6-1 to 6-3 is controlled based on the flow rate measuring means built in 6-1 to 6-3 and the deviation of the temperature and the set temperature of the air supply from the air conditioners 5-1 to 5-3. And the air conditioning controller 14 which limits the valve opening degree so that the valve passage flow rate is less than or equal to the design maximum flow rate when the valve passage flow rate exceeds the design maximum flow rate, and an air conditioner 5 determined by the valve opening degree and the passage flow rate. The water supply control apparatus 15 which controls a water supply pressure based on the control state of -1-5-3 is provided.

Air conditioners, flow measurement means, air conditioning controls, water supply controls

Description

HVAC control system and HVAC control method {AIR CONDITIONING CONTROL SYSTEM AND AIR CONDITIONING CONTROL METHOD}

The present invention relates to an air conditioning control system and an air conditioning control method for controlling the flow rate of cold and hot water flowing to the air conditioner by adjusting the opening degree of the valve.

Conventionally, the system which controls the water supply pressure of the heat medium is proposed about the air conditioning control system which uses cold / hot water as a heat medium (for example, refer patent document 1, patent document 2).

Fig. 1 is a block diagram showing the configuration of an air conditioning control system according to a first embodiment of the present invention. However, since the overall configuration is the same in the prior art, a conventional air conditioning control system will be described with reference to Fig. 1.

Cold and hot water (water supply), which is pressurized by the primary pumps 2-1 and 2-2 and to which the heat quantity is added by the heat sources 1-1 and 1-2, is sent to the royal road header 3-1, and the secondary pump 9-1, 9-2, and are supplied to the water supply pipe 4 through the royal road header 3-2, and pass through the air conditioners 5-1 to 5-3 to return water by the return pipe 7 as a return header ( 8), it is again pumped by pumps 2-1 and 2-2.

The air conditioning control unit 14 controls the valves 6-1 to 6-3 based on the deviation of the temperature and temperature set value of the air supply from the air conditioners 5-1 to 5-3 or the deviation of the humidity and humidity setting value of the air supply. Control the degree of opening

In addition, the air conditioning controller 14 determines the air conditioner control status based on the opening degree of the valves 6-1 to 6-3 and the valve passage flow rate.

The water supply control device 15 determines the set water supply pressure based on the air conditioner control status, and the inverters 9-1a and 9-2a so that the current water supply pressure measured by the pressure sensor 11 matches the set water supply pressure. The inverter speed of the secondary pumps 9-1 and 9-2 is controlled through

[Patent Document 1] Japanese Patent Laid-Open No. 8-75223

[Patent Document 2] Japanese Patent Application Laid-Open No. 8-75224

According to the air conditioning control system disclosed by patent document 1 and patent document 2, energy saving can be implement | achieved by making water supply pressure variable.

However, in the air conditioning control system disclosed in Patent Documents 1 and 2, when cold and hot water exceeding the maximum design flow rate flows through the air conditioner due to an error in the temperature and humidity setting (overcooling, excessive heating), the energy consumption of the air conditioning control system is increased. There was a problem of increasing.

In general, the cold and hot water coil of the air conditioner is designed according to the heat supply, and the temperature control or humidity control controls the degree of opening of the valve by feedback control based on the temperature deviation or the humidity deviation, The flow rate is controlled.

On the other hand, in general, temperature and humidity settings are delegated to a user or a building manager, and when they change a setting that deviates from the design condition, cold and hot water that deviates from the design maximum flow rate passes through the cold / hot water coil of the air conditioner. In the hot and cold water coil, the maximum calorific condition is determined by the design temperature difference condition and the design maximum flow rate condition.

Here, when the hot and cold water exceeding the design maximum flow rate flows in a cold / hot water coil as mentioned above, the conveyance power of a pump will increase and energy consumption will increase. In addition, since the amount of heat exchangeable above the design condition is almost constant in the cold and hot water coil, the temperature difference between the hot and cold water at the inlet and the outlet of the air conditioner decreases in inverse proportion to the flow rate, and as a result, the efficiency of the heat source device is deteriorated, The energy consumption is increased.

Originally, the manual valve should be adjusted so that the opening degree of the valve for each piping system is the maximum design flow rate at the maximum, but it is not performed because the process water takes.

In addition, there is a method of deviating the opening degree of the valve of the system having a large required flow rate from the water supply control judgment index, or weakening the weight in the water supply control, but there is a problem that the labor of the field work and the number of processes are increased.

In the air conditioning control system disclosed in Patent Documents 1 and 2, although the cold and hot water exceeding the design maximum flow rate does not flow through the cold and hot water coil, the design temperature difference between the cold and hot water cannot be secured at the inlet and the outlet of the air conditioner. There was a problem that the energy consumption of the control system increases. As described above, when the design temperature difference cannot be secured, the efficiency of the heat source group deteriorates, and the energy consumption of the heat source group increases. The reason why the design temperature difference cannot be secured even though the cold and hot water exceeding the design maximum flow rate is not flown is because it is an excess flow rate for the air conditioning load.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an air conditioning control system and an air conditioning control method capable of suppressing an increase in energy consumption even when a flow rate request exceeding a design maximum flow rate occurs due to an error in temperature and humidity setting. It aims to provide.

Moreover, an object of this invention is to provide the air conditioning control system and the air conditioning control method which can suppress the increase of energy consumption, when it is overflowed with respect to an air conditioning load.

An air conditioning control system of the present invention includes a pump for discharging cold and hot water, an air conditioner receiving the cold and hot water, a valve for controlling the flow rate of cold and hot water supplied to the air conditioner, and a flow rate measurement for measuring the flow rate of cold and hot water passing through the valve. Air conditioning control means for controlling the opening degree of the valve on the basis of a means, a temperature difference between a supply air discharged from the air conditioner and a set temperature, and a valve passage flow rate measured by the flow measurement means exceeds a design maximum flow rate. And the valve opening degree limiting means for limiting the valve opening degree so that the valve passage flow rate is equal to or less than a design maximum flow rate, and from the pump on the basis of a control state of the air conditioner determined by the valve opening degree and the valve passage flow rate. Water supply pressure control means for controlling the water supply pressure, which is the pressure of cold and hot water sent to the air conditioner It is a comparison.

In addition, the air conditioning control system of the present invention includes a pump for discharging cold and hot water, an air conditioner receiving the cold and hot water, a valve for controlling the flow rate of cold and hot water supplied to the air conditioner, and a flow rate for measuring the flow rate of cold and hot water passing through the valve. Measuring means, a return temperature measuring means for measuring the temperature of the return water passing through the air conditioner, an air conditioning control means for controlling the opening degree of the valve based on a deviation between the temperature of the air supply and the set temperature sent out from the air conditioner, The measured return temperature when the valve flow rate measured by the flow measurement means is equal to or less than the design maximum flow rate, and when the measured return temperature measured by the return temperature measurement means is lower than the designed return temperature when the cooling operation is performed or when the heating operation is performed. When is higher than the designed return temperature, the measured return temperature is higher than the designed return temperature during cooling operation. In the case of high heating operation, the valve opening degree limiting means for limiting the valve opening degree so that the measured return temperature is equal to or lower than the designed return temperature, and based on the control state of the air conditioner determined by the valve opening degree and the valve passage flow rate, And a water supply pressure control means for controlling the water supply pressure, which is the pressure of cold and hot water discharged from the pump to the air conditioner.

In addition, in the air conditioning control system provided with a pump, an air conditioner, and a valve, the air conditioning control method of this invention controls the opening degree of the said valve based on the deviation of the temperature of a supply air discharged from the said air conditioner, and a set temperature. And a flow rate measurement procedure for measuring the flow rate of the hot and cold water passing through the valve, and when the valve flow rate measured by the flow rate measurement sequence exceeds the design maximum flow rate, Controlling the water supply pressure, which is the pressure of the hot and cold water discharged from the pump to the air conditioner, based on a valve opening degree restriction order for restricting the valve opening degree to the extent possible, and a control state of the air conditioner determined by the valve opening degree and the valve passage flow rate A water supply pressure control procedure is provided.

In the air conditioning control system provided with a pump, an air conditioner, and a valve, the air conditioning control method of the present invention is an air conditioning control procedure for controlling the opening degree of the valve based on a deviation of a temperature and a set temperature of the air supply discharged from the air conditioner. And a flow rate measurement procedure for measuring the flow rate of the hot and cold water passing through the valve, a return temperature measurement procedure for measuring the temperature of the return water passing through the air conditioner, and a valve passage flow rate measured by the flow measurement procedure is the maximum design flow rate. The measurement return temperature measured by the return temperature measurement procedure in the cooling operation is lower than the design return temperature or when the measurement return temperature is higher than the design return temperature in the heating operation, and the measurement when the cooling operation is performed. When the return temperature is above the designed return temperature and the heating operation, the measured return temperature is less than the designed return temperature Controlling the water supply pressure, which is the pressure of the hot and cold water discharged from the pump to the air conditioner, based on a valve opening degree restriction order for restricting the valve opening degree to the extent possible, and a control state of the air conditioner determined by the valve opening degree and the valve passage flow rate A water supply pressure control procedure is provided.

According to the present invention, when the measured valve flow rate exceeds the design maximum flow rate, the valve opening degree is limited, and the flow rate exceeds the design maximum flow rate due to a temperature and humidity setting error (overcooling, overheating) or the like. Even if a demand arises, the flow through the valve can be suppressed to be equal to or less than the design maximum flow rate, and an increase in energy consumption due to an increase in the pump conveyance power can be suppressed. Moreover, in this invention, since the temperature difference of cold / hot water can be ensured at the inlet and outlet of an air conditioner by suppressing valve flow volume to be below a design maximum flow volume, the operation efficiency of a heat source machine can be improved, and consumption of a heat source machine is consumed. The increase in energy can be suppressed. In addition, in the present invention, it is not necessary to take a method such as shifting the opening degree of the valve of the system having a large required flow rate from the judgment indicator of the water supply control or reducing the weight in the water supply control, thereby reducing the labor of the field work. Can be.

Further, in the present invention, when the measured valve passing flow rate is equal to or less than the design maximum flow rate, and when the measured return temperature measured during the cooling operation is lower than the designed return temperature or when the measured return temperature is higher than the designed return temperature during the heating operation, By restricting the opening degree of the valve, the valve passage flow rate can be suppressed when the flow rate is excessive with respect to the air conditioning load. As a result, in the present invention, since the temperature difference between the cold and hot water can be ensured at the inlet and the outlet of the air conditioner, the operating efficiency of the heat source machine can be improved, and the increase in the energy consumption of the heat source machine can be suppressed.

[First Embodiment]

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a block diagram showing the configuration of an air conditioning control system according to a first embodiment of the present invention.

The air conditioning control system of FIG. 1 is a heat pump 1-1, 1-2, such as a cold / hot water generator, a heat pump, a refrigerator, a boiler which generate cold / hot water, and a primary pump as an auxiliary device of the heat source devices 1-1, 1-2. 2-1, 2-2, and heather headers 3-1 and 3-2 for mixing cold and hot water from the plurality of heat source groups 1-1 and 1-2, the water supply pipe 4, and the air conditioners 5-1 to 5 -3, the valves 6-1 to 6-3 for controlling the flow rate of the hot and cold water supplied to the air conditioners 5-1 to 5-3, the return line 7 and the heat exchanger in the air conditioners 5-1 to 5-3 A heat exchange header (8) returning the hot and cold water sent through the return pipe (7), a secondary pump (9-1, 9-2) installed between the heat flow headers 3-1 and 3-2, and the heat flow header 3-1 and The bypass valve 10 provided between 3-2, the pressure sensor 11 which measures the water supply pressure of the piping system end, and the air supply temperature sensor 12 which measures the temperature of the air supply discharged | emitted from the air conditioners 5-1 to 5-3. Temperature of return water which passed through -1-12-3 and air conditioner 5-1-5-3 The air conditioning control device which controls the supply amount of cold / hot water to the air conditioners 5-1 to 5-3 by adjusting the return temperature sensor (return temperature measuring means) 13 and the opening degree of valves 6-1 to 6-3 ( 14) and a water feed control device 15 for controlling pumps 9-1, 9-2, etc., which discharge cold and hot water to the air conditioners 5-1 to 5-3.

The valves 6-1 to 6-3 are each provided with a flow rate sensor (flow rate measuring means) for measuring the flow rate of the hot and cold water passing through the valves 6-1 to 6-3. The secondary pumps 9-1 and 9-2 are equipped with inverters 9-1a and 9-2a, respectively.

Fruits (water) such as cold water or hot water, which are pressurized by the primary pumps 2-1 and 2-2 and whose calories are added by the heat sources 1-1 and 1-2, are sent to the royal header 3-1, and 2 It is pumped by the secondary pumps 9-1 and 9-2 and supplied to the water supply line 4 via the royal road header 3-2, and passes through the air conditioners 5-1 to 5-3 to return water by the return line 7 as return. It reaches the header 8, and is again conveyed by the pumps 2-1 and 2-2. Thus, cold and hot water circulates the above path.

In the above description, the end of the piping system is either near the valve provided at the highest point of the building or near the valve having the longest drawing distance from the pump. Which of these choices can be appropriately determined by the building. Any place for measuring the water supply pressure may be a pipe between the pump and the valve, but it is particularly preferable to measure at the end of the piping system. That is, since the end of the piping system is most likely to be affected by the water pressure drop due to the pressure loss of the pipe, if the water supply pressure here is controlled to satisfy the predetermined value, it is possible to satisfy the predetermined water supply pressure in all piping systems. do.

2 is a block diagram showing an example of the configuration of the air conditioning controller 14. As shown in FIG. The air conditioning control device 14 includes an air supply temperature receiving unit 140 for receiving a value of the air supply temperature measured by the air supply temperature sensors 12-1 to 12-3 and a flow rate sensor of the valves 6-1 to 6-3. The flow rate receiving unit 141 for receiving the value of the flow rate, the return temperature receiving unit 142 for receiving the value of the return temperature measured by the return temperature sensor 13, and a temperature set value set by a user or a manager in charge of the building ( Or a setting unit 143 which receives the humidity set value), a storage unit 144 which stores in advance the value of the design maximum flow rate of cold / hot water flowing through the air conditioners 5-1 to 5-3, the design return temperature value, and the air conditioner 5 The calculating part 145 and the calculating part 145 which determine the set flow volume of the cold / hot water supplied to -1-5-3, and determine the control state (air conditioner control status) of the air conditioners 5-1-5-3. The valve control unit 146 for controlling the opening degree of the valves 6-1 to 6-3 and the air conditioner control status based on the set flow rate The air conditioner has a control status transmission unit 147 to send to the control device 15.

The calculating part 145 and the valve control part 146 comprise the air conditioning control means and the valve opening degree means.

3 is a block diagram showing a configuration example of the water feed control device 15. The water supply control device 15 includes a water supply pressure receiving unit 150 for receiving a value of water supply pressure measured by the pressure sensor 11, and an air conditioner control status receiving unit for receiving an air conditioner control status transmitted from the air conditioning control device 14. 151, a calculation unit 152 for determining the set water supply pressure based on the air conditioner control status, and a second pump 9-a through the inverters 9-1a and 9-2a based on the set water supply pressure determined by the calculation unit 152. It has the pump control part 153 which controls the rotation speed of 1, 9-2 (henceforth an inverter rotation speed).

Next, the operation of the air conditioning control system of the present embodiment will be described. 4 is a flowchart showing the operation of the air conditioning control device 14, FIG. 5 is a flowchart showing a method of determining the air conditioner control status by the air conditioning control device 14, and FIG. 6 shows the operation of the water supply control device 15. FIG. 7 is a flowchart showing a method for determining the total water supply status by the water supply controller 15. FIG.

The air conditioners 5-1 to 5-3 receive the supply of cold water or hot water from the heat sources 1-1 and 1-2, and cool or heat the mixed air of the air (vent) and the outside air returned from the room which becomes the air conditioning control area. And supply the cooled or heated air supply to the room.

The air supply temperature receiving unit 140 of the air conditioning controller 14 receives an air supply temperature signal indicating the air supply temperature measured by the air supply temperature sensors 12-1 to 12-3 (Fig. 4 step S1).

The calculation unit 145 calculates the set flow rates of the valves 6-1 to 6-3 so that the temperature set value set by the setting unit 143 and the value of the air supply temperature received by the air supply temperature receiving unit 140 coincide with each other ( Step S2). That is, the calculating part 145 calculates a set flow volume by PID calculation based on the deviation of a temperature set value and air supply temperature, for example. The calculating part 145 calculates such a set flow volume for every pair of an air conditioner and the air supply temperature sensor corresponding to this.

The humidity of the air supply may be measured by a humidity sensor, and the set flow rate may be calculated based on the deviation between the humidity setting value and the current air supply humidity.

On the other hand, the flow rate receiving section 141 receives a flow rate signal indicating the flow rate of the valve flow of cold / hot water measured by the flow rate sensors of the valves 6-1 to 6-3 (step S3).

The calculation unit 145 compares the value of the current valve passage flow rate received by the flow rate receiving unit 141 with the value of the design maximum flow rate stored in the storage unit 144 so that the current valve passage flow rate exceeds the design maximum flow rate. In this case (decision YES in step S4), the opening degree of the valves 6-1 to 6-3 is limited so that the valve passage flow rate is equal to or less than the design maximum flow rate (step S5).

The concrete method of restricting the opening degree of valve 6-1-6-3 becomes as follows, for example. The calculation unit 145 calculates the set flow rate calculated in step S2 when the current flow through the valve exceeds the design maximum flow rate, or when the set flow rate calculated in step S2 is smaller than the current set flow rate and the design maximum flow rate. Is updated as a new set flow rate and the set flow rate after the update is output to the valve control unit 146 to limit the opening degree of the valves 6-1 to 6-3 (step S5). In addition, the calculation unit 145 sets a new design maximum flow rate when the current flow through the valve exceeds the design maximum flow rate, or when the set flow rate calculated in step S2 is equal to or greater than the current set flow rate or more than the design maximum flow rate. As the flow rate, the set flow rate after the update is output to the valve control unit 146 to limit the opening degree of the valves 6-1 to 6-3 (step S5).

The valve control unit 146 controls the opening degree of the valves 6-1 to 6-3 so that the value of the current valve passage flow rate matches the value of the set flow rate output from the calculation unit 145. In this way, the opening degree of the valves 6-1 to 6-3 can be limited. The calculating part 145 performs the process of step S4, S5 every valve 6-1 to 6-3.

The design maximum flow rate stored in advance in the storage unit 144 may be a value common to all the air conditioners 5-1 to 5-3, or may be a value determined for each of the air conditioners 5-1 to 5-3.

Next, when the current valve passage flow rate is equal to or less than the design maximum flow rate (determination NO in Step S4), the return temperature receiving unit 142 receives a return temperature signal indicating the return temperature measured by the return temperature sensor 13. (Step S6).

The calculating unit 145 compares the value of the current return temperature received by the return temperature receiving unit 142 with the value of the design return temperature stored in the storage unit 144, and the current return temperature is lower than the design return temperature. (Decision YES in Step S7), the opening degree of the valves 6-1 to 6-3 is limited so that the return temperature is equal to or higher than the designed return temperature (step S8).

The specific method of limiting the opening degree of valve 6-1-6-3 is as above. When the current return temperature is equal to or higher than the design return temperature in step S7, the calculation unit 145 outputs the set flow rate calculated in step S2 as the new set flow rate to the valve control unit 146. The degree of opening of the valves 6-1 to 6-3 is controlled (step S9).

When the current return temperature is lower than the designed return temperature, the determination YES in step S7 is the case of the cooling operation. In the case of heating operation, when the current return temperature is higher than the designed return temperature, the determination YES is made in step S7, and when the current return temperature is less than or equal to the design return temperature, the determination is made NO. The opening degree of the valves 6-1 to 6-3 may be limited so that the return temperature is below the designed return temperature. It goes without saying that the design return temperature is set separately in the case of cold water (cooling operation) and hot water (heating operation).

After completion of the processing in steps S5, S8, and S9, the calculation unit 145 determines the control state (air conditioner control status) of the air conditioners 5-1 to 5-3 based on the flow rate control state of the valves 6-1 to 6-3. Then, the air conditioner control status is transmitted to the water supply control device 15 through the air conditioner control status transmitter 147 (step S11). A method of determining the air conditioner control status in step S10 will be described with reference to FIG. 5.

First, the calculation unit 145 checks whether or not the entire open state of the valves 6-1 to 6-3 has been maintained for a predetermined time (for example, 5 minutes) (Fig. 5 step S21), and if it does not hold for a predetermined time. In the following, the air conditioner control status of the corresponding air conditioner is referred to as "excess of water pressure" (step S22). In addition, when the entire open state of the valves 6-1 to 6-3 is maintained for a predetermined time, the calculation unit 145 has a predetermined time period (for example, a state in which the actual flow rate of the valve passage is shorter than the set flow rate). 5 minutes) It is checked whether or not it has been held (step S23).

The calculation unit 145 sets the air conditioner control status of the corresponding air conditioner to "optimal water pressure" when the flow rate shortage state is not maintained for a predetermined time (step S24), and when the flow rate shortage state is maintained for a predetermined time, The air conditioner control status of the air conditioner is set to "lack of water pressure" (step S25). In this way, the process of step S10 ends. The calculating part 145 performs the process of step S10 and S11 for every air conditioner 5-1 to 5-3 (every valve 6-1 to 6-3).

The air conditioning controller 14 repeatedly performs the processes of steps S1 to S11 shown in FIG. 4 as described above until the system stops operation (YES in FIG. 4 step S12).

Next, the operation of the water feed control device 15 will be described with reference to FIGS. 6 and 7. The air conditioner control status receiver 151 of the water feed control device 15 receives the air conditioner control status sent from the air conditioning control device 14 (FIG. 6 step S31).

The calculating part 152 of the water supply control apparatus 15 determines the comprehensive water supply state (general water supply status) based on the received air conditioner control status (step S32). The determination method of the comprehensive water transmission status in step S32 is demonstrated using FIG.

First, the calculating part 152 checks whether there exists at least one "water supply pressure" in the air conditioner control status of each air conditioner 5-1-5-3 (FIG. 7 step S41), and even if there is one "water supply lacking" If so, the comprehensive water supply status is determined to be "lack of water pressure" (step S42). If the air conditioner control status of each of the air conditioners 5-1 to 5-3 does not have "low water pressure", the calculating unit 152 checks the number of "high water pressure" (step S43), If the number is equal to or greater than the set number (one in this embodiment), the total water supply status is determined as "too much water pressure" (step S44). In addition, the calculating part 152 determines the total water supply status as "optimal water pressure", if the number of "water pressure excess" is less than the set number (step S45). In this way, the process of step S32 is complete | finished.

Next, the calculating part 152 determines the set water supply pressure based on the comprehensive water supply status (FIG. 6 step S33). The determination method of the set water supply pressure is as follows, for example. The calculating part 152 maintains the current set water supply pressure without changing, if the total water supply status is "optimal water supply pressure" (step S33). In addition, the calculating part 152 makes the new set water supply pressure the value which added predetermined | prescribed set value change amount (DELTA) P to the current set water supply pressure, if the comprehensive water supply status is "low water supply pressure" (step S33). In addition, the calculating part 152 makes the value which subtracted the predetermined | prescribed set value change amount (DELTA) P from the current set water supply pressure as a new set water supply pressure, if the total water supply status is "extra water pressure" (step S33).

The water feed pressure receiving unit 150 of the water feed control device 15 receives a water feed pressure signal indicating the water feed pressure measured by the pressure sensor 11 (step S34).

And the calculating part 152 outputs the value of the set water supply pressure determined by step S33 to the pump control part 153, and controls water supply pressure (step S35). The pump control unit 153 controls the inverters of the secondary pumps 9-1 and 9-2 through inverters 9-1a and 9-2a so that the current water supply pressure measured by the pressure sensor 11 matches the set water supply pressure. Control the number of revolutions.

The water feed control device 15 repeatedly performs the processes of steps S31 to S35 shown in FIG. 6 as described above until the system stops operation (YES in FIG. 6 S36).

As described above, in the present embodiment, when the measured valve flow rate exceeds the design maximum flow rate, the opening degree of the valves 6-1 to 6-3 is limited, so that the error in the temperature and humidity setting (overcooling, excess) Even if a flow rate request exceeding the design maximum flow rate occurs due to heating), the flow rate through the valve can be suppressed to be equal to or less than the design maximum flow rate, and the increase in energy consumption due to the increase in the pump conveyance power can be suppressed. In addition, in this embodiment, since the valve passage flow rate is suppressed to be below the design maximum flow rate, the temperature difference between the cold and hot water can be ensured at the inlet and the outlet of the air conditioners 5-1 to 5-3. The operating efficiency of -2 can be improved, and the increase in energy consumption of the heat source groups 1 to 1 and 1-2 can be suppressed. In addition, in this embodiment, it is not necessary to take a method such as shifting the opening degree of the valve of the system having a large required flow rate from the determination index of water supply control, or weakening the weight in water supply control, and eliminating the trouble of field work. can do.

In this embodiment, when the measured valve passage flow rate is less than or equal to the design maximum flow rate, and the measured return temperature measured during the cooling operation is lower than the designed return temperature, or when the measured return temperature is higher than the designed return temperature during the heating operation. By limiting the opening degree of the valves 6-1 to 6-3, the valve passage flow rate can be suppressed when the flow rate is excessive with respect to the air conditioning load. As a result, in this embodiment, since the temperature difference between the cold and hot water can be ensured at the inlet and the outlet of the air conditioners 5-1 to 5-3, the operating efficiency of the heat sources 1-1 and 1-2 can be improved, and the heat source An increase in energy consumption of groups 1-1 and 1-2 can be suppressed.

In addition, by incorporating the flow rate sensors in the valves 6-1 to 6-3 as in the present embodiment, there is no need to construct the flow rate sensor in the pipe, and the object to be applied to the present invention can be expanded.

In addition, although this embodiment demonstrated the application example to the system which has the secondary pumps 9-1 and 9-2, also in the system which has only the primary pumps 2-1 to 2-3, the same method as this embodiment It is sufficient to control the primary pumps 2-1 to 2-3.

The air conditioning control device 14 and the water supply control device 15 described in this embodiment can be realized by a computer having a CPU, a storage device and an interface, and a program for controlling these hardware resources. The CPUs of these computers execute the processes described in the present embodiment in accordance with the programs stored in the storage device.

[Industrial Availability]

The present invention can be applied to air conditioning control.

1 is a block diagram showing the configuration of an air conditioning control system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration example of an air conditioning control device of the air conditioning control system of FIG.

3 is a block diagram showing an example of a configuration of a water supply control apparatus of the air conditioning control system of FIG.

FIG. 4 is a flowchart showing the operation of the air conditioning control device of FIG. 2.

FIG. 5 is a flowchart showing a method for determining an air conditioner control status by the air conditioning control device of FIG. 2.

6 is a flowchart showing the operation of the water supply control device of FIG.

FIG. 7 is a flowchart showing a method for determining the overall water supply status by the water supply control device of FIG. 3.

[Description of the code]

1-1, 1-2: heat source 2-1, 22-2: primary pump

3-1, 3-2: header header 4: water supply pipe

5-1 to 5-3: Air conditioner 6-1 to 6-3: Valve

7: return pipe 8: track header

9-1, 9-2: Secondary pump 9-1a, 9-2a: Inverter

10: bypass valve 11: pressure sensor

12-1 to 12-3: Air supply temperature sensor 13: Return temperature sensor

14: air conditioning control device 15: water supply control device

140: air supply temperature receiving unit 141: flow rate receiving unit

142: return temperature receiving unit 143: setting unit

144: storage unit 145: arithmetic unit

146: valve control unit 147: air conditioner control status receiver

150: water supply pressure receiver 151: air conditioner control status receiver

152: calculation unit 153: pump control unit

Claims (4)

Pumps to discharge cold and hot water, An air conditioner receiving the cold and hot water, A valve for controlling the flow rate of the cold and hot water supplied to the air conditioner, Flow measurement means for measuring the flow rate of the cold and hot water passing through the valve, Air conditioning control means for controlling an opening degree of the valve based on a deviation between a temperature of a supply air discharged from the air conditioner and a set temperature; Valve opening degree limiting means for limiting the valve opening degree such that the valve passage flow rate is less than or equal to the design maximum flow rate when the valve passage flow rate measured by the flow measurement means exceeds a design maximum flow rate; And a water supply pressure control means for controlling the water supply pressure, which is the pressure of cold and hot water discharged from the pump to the air conditioner, based on the control state of the air conditioner determined by the valve opening degree and the valve passage flow rate. . Pumps to discharge cold and hot water, An air conditioner receiving the cold and hot water, A valve for controlling the flow rate of the cold and hot water supplied to the air conditioner, Flow measurement means for measuring the flow rate of the cold and hot water passing through the valve, A return temperature measuring means for measuring the temperature of the return water passing through the air conditioner; Air conditioning control means for controlling an opening degree of the valve based on a deviation between a temperature of a supply air discharged from the air conditioner and a set temperature; The measured return temperature when the valve flow rate measured by the flow measurement means is equal to or less than the design maximum flow rate, and when the measured return temperature measured by the return temperature measurement means is lower than the designed return temperature when the cooling operation is performed or when the heating operation is performed. Is higher than the design return temperature, the valve opening degree limiting the valve opening degree is limited so that the measured return temperature is higher than the designed return temperature in the cooling operation and the measured return temperature is lower than the designed return temperature in the heating operation. Sudan, And a water supply pressure control means for controlling the water supply pressure, which is the pressure of cold and hot water discharged from the pump to the air conditioner, based on the control state of the air conditioner determined by the valve opening degree and the valve passage flow rate. . In an air conditioning control system having a pump for discharging cold and hot water, an air conditioner receiving the cold and hot water, and a valve for controlling a flow rate of cold and hot water supplied to the air conditioner, an air conditioning control method for controlling the opening degree of the valve, An air conditioning control procedure for controlling the opening degree of the valve based on a deviation between the temperature of the air supply and the set temperature discharged from the air conditioner, A flow measurement procedure for measuring the flow rate of cold and hot water passing through the valve, A valve opening degree restriction procedure for limiting the valve opening degree such that the valve passage flow rate is less than or equal to the design maximum flow rate when the valve passage flow rate measured by this flow measurement procedure exceeds the design maximum flow rate; And a water supply pressure control procedure for controlling the water supply pressure, which is the pressure of cold and hot water discharged from the pump to the air conditioner, based on the control state of the air conditioner determined by the valve opening degree and the valve passage flow rate. . In an air conditioning control system having a pump for discharging cold and hot water, an air conditioner receiving the cold and hot water, and a valve for controlling a flow rate of cold and hot water supplied to the air conditioner, an air conditioning control method for controlling the opening degree of the valve, An air conditioning control procedure for controlling the opening degree of the valve based on a deviation between the temperature of the air supply and the set temperature discharged from the air conditioner, A flow measurement procedure for measuring the flow rate of cold and hot water passing through the valve, A return temperature measurement procedure for measuring the temperature of the return water passing through the air conditioner, The measured return temperature when the valve flow rate measured according to the flow measurement sequence is equal to or less than the design maximum flow rate, and the measured return temperature measured by the return temperature measurement procedure during cooling operation is lower than the designed return temperature or when the heating operation is performed. Is higher than the designed return temperature, the valve opening degree of limiting the valve opening degree such that the measured return temperature is higher than the designed return temperature in the cooling operation and the measured return temperature is lower than the designed return temperature in the heating operation. With limited order, And a water supply pressure control procedure for controlling the water supply pressure, which is the pressure of cold and hot water discharged from the pump to the air conditioner, based on the control state of the air conditioner determined by the valve opening degree and the valve passage flow rate. .

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