JP2009030823A - Air conditioning control system and air conditioning control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning control system and an air conditioning control method for preventing an increase in energy to be consumed even if a flow rate exceeding a maximum designed flow rate is demanded due to an error in a setting temperature and humidity. <P>SOLUTION: This air conditioning control system is provided with pumps 9-1, 9-2 feeding cold temperature water, air conditioners 5-1 to 5-3 receiving the supply of cold temperature water, valves 6-1 to 6-3 controlling flow rates of cold temperature water, flow rate measuring means incorporated in the valves 6-1 to 6-3, an air conditioning controller 14 controlling openings of the valves 6-1 to 6-3 based on the deviation of a temperature of the air fed out of the air conditioners 5-1 to 5-3 from the set temperature and limiting the openings of the valves so that flow rate of valve passing water is not higher than the maximum designed flow rate when the flow rate of valve passing water exceeds the maximum designed flow rate, and a feed water controller 15 controlling the pressure of feed water based on control states of the air conditioners 5-1 to 5-3 decided by the openings of the valves and the flow rate of valve passing water. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

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

Conventionally, regarding an air conditioning control system using cold / hot water as a heat medium, a system for controlling the water supply pressure of the heat medium has been proposed (see, for example, Patent Document 1 and Patent Document 2).
FIG. 1 is a block diagram showing the configuration of the air conditioning control system according to the first embodiment of the present invention. Since the overall configuration is the same in the prior art, the conventional air conditioning control system is shown in FIG. explain.

Cold / hot water (water supply) pumped by the primary pumps 2-1 and 2-2 and added with heat by the heat source units 1-1 and 1-2 is sent to the forward header 3-1, and the secondary pumps 9-1, It is pumped by 9-2, supplied to the water supply line 4 through the forward header 3-2, passes through the air conditioners 5-1 to 5-3, and reaches the return path header 8 as return water by the return water pipe 7. Pumped again by the pumps 2-1 and 2-2.
The air-conditioning control device 14 controls the valve 6-1 based on the deviation between the temperature of the supply air sent from the air conditioners 5-1 to 5-3 and the temperature set value, or the difference between the humidity of the supply air and the humidity set value. Control the opening of ~ 6-3.

Moreover, the air-conditioning control apparatus 14 determines an 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 sets 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 rotational speed of the secondary pumps 9-1 and 9-2 is controlled via

JP-A-8-75223 JP-A-8-75224

According to the air conditioning control system disclosed in Patent Literature 1 and Patent Literature 2, energy saving can be realized by making the water supply pressure variable.
However, in the air conditioning control system disclosed in Patent Literature 1 and Patent Literature 2, if cold / warm water exceeding the design maximum flow rate flows into the air conditioner due to an error in temperature / humidity setting (overcooling, overheating), etc., the air conditioning control system There was a problem that energy consumption increased.

In general, the cold / hot water coil of an air conditioner is designed according to the amount of heat supplied, and the temperature control or humidity control is controlled by feedback control based on the temperature deviation or humidity deviation to control the opening of the valve. The flow rate of cold / hot water passing through is controlled.
On the other hand, temperature / humidity settings are generally left to the user or the building manager, and if they change the settings that deviate from the design conditions, the chilled / hot water that deviates from the design maximum flow rate will cause the chilled / hot water coil of the air conditioner to pass. In the cold / hot water coil, the maximum heat quantity condition is determined by the design temperature difference condition and the design maximum flow rate condition.

  Here, when the cold / hot water exceeding the design maximum flow rate flows into the cold / hot water coil as described above, the conveyance power of the pump increases and the energy consumption increases. In addition, the amount of heat that can be exchanged over the design conditions in the cold / hot water coil is almost constant, so the temperature difference between the cold / hot water at the inlet and outlet of the air conditioner decreases in inverse proportion to the flow rate, resulting in a deterioration in the efficiency of the heat source machine. The energy consumption of the heat source machine will increase.

Originally, it should be adjusted by a manual valve so that the opening degree of the valve is the maximum design flow rate at the maximum for each piping system, but this is not done because it takes time.
In addition, there are methods such as removing the valve opening of the system with a large required flow rate from the judgment index of water supply control, or weakening the weighting in water supply control, but there is a problem that labor and man-hours of field work increase. .

  Moreover, in the air-conditioning control system disclosed in Patent Document 1 and Patent Document 2, the design temperature of the chilled / hot water at the inlet and the outlet of the air conditioner, even though the chilled / hot water coil does not flow the chilled / hot water exceeding the design maximum flow rate. There was a problem that the difference could not be secured and the energy consumption of the air conditioning control system increased. As described above, when the design temperature difference cannot be ensured, the efficiency of the heat source device deteriorates and the energy consumption of the heat source device increases. The reason why the design temperature difference cannot be ensured even though cold / hot water exceeding the design maximum flow rate is not flowing is that the flow rate is excessive with respect to the air conditioning load.

The present invention has been made in order to solve the above-described problem, and an air conditioning control system 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 / humidity setting or the like. It aims at providing the air-conditioning control method.
Another object of the present invention is to provide an air-conditioning control system and an air-conditioning control method that can suppress an increase in energy consumption when the flow rate is excessive with respect to the air-conditioning load.

An air conditioning control system according to the present invention includes a pump that delivers cold / hot water, an air conditioner that receives the supply of cold / hot water, a valve that controls a flow rate of cold / hot water supplied to the air conditioner, and a cold / hot temperature that passes through the valve. Measured by flow rate measuring means for measuring the flow rate of water, air conditioning control means for controlling the opening of the valve based on the deviation between the temperature of the supply air sent from the air conditioner and the set temperature, and the flow rate measuring means A valve opening restricting means for restricting the valve opening so that the valve passing flow is less than or equal to the designed maximum flow when the valve passing flow exceeds the designed maximum flow, and the valve opening and the valve passing flow. Water supply pressure control means for controlling the water supply pressure, which is the pressure of the cold / hot water sent from the pump to the air conditioner, based on the determined control state of the air conditioner.
The air-conditioning control system of the present invention includes a pump that delivers cold / hot water, an air conditioner that receives supply of the cold / hot water, a valve that controls a flow rate of the cold / hot water supplied to the air conditioner, and a valve that passes through the valve. The flow rate measuring means for measuring the flow rate of the cold / hot water to be measured, the return water temperature measuring means for measuring the temperature of the return water that has passed through the air conditioner, and the difference between the temperature of the supply air sent from the air conditioner and the set temperature Air-conditioning control means for controlling the opening degree of the valve based on the above, and the valve passage flow rate measured by the flow rate measurement means is less than or equal to the design maximum flow rate, and was measured by the return water temperature measurement means during cooling operation When the measured return water temperature is lower than the design return water temperature or when the measured return water temperature is higher than the design return water temperature during heating operation, the measured return water temperature is equal to or higher than the design return water temperature during cooling operation. Heating operation When the valve opening degree is limited to restrict the valve opening so that the measured return water temperature is equal to or lower than the design return water temperature, and based on the control state of the air conditioner determined by the valve opening and the valve passage flow rate. Water supply pressure control means for controlling the water supply pressure, which is the pressure of the cold / hot water sent from the pump to the air conditioner.

Further, in an air conditioning control system including a pump, an air conditioner, and a valve, the air conditioning control method of the present invention is based on the deviation between the temperature of the supply air sent from the air conditioner and the set temperature. The air conditioning control procedure for controlling the flow rate, the flow rate measurement procedure for measuring the flow rate of cold / hot water passing through the valve, and the valve flow rate when the valve flow rate measured by this flow rate measurement procedure exceeds the design maximum flow rate, From the pump to the air conditioner based on the valve opening restriction procedure for restricting the valve opening so as to be equal to or less than the design maximum flow rate, and the control state of the air conditioner determined by the valve opening and the flow rate through the valve. And a water supply pressure control procedure for controlling the water supply pressure, which is the pressure of the cold / warm water to be sent out.
Further, in an air conditioning control system including a pump, an air conditioner, and a valve, the air conditioning control method of the present invention is based on the deviation between the temperature of the supply air sent from the air conditioner and the set temperature. An air conditioning control procedure for controlling the flow rate, a flow rate measurement procedure for measuring the flow rate of cold / hot water passing through the valve, a return water temperature measurement procedure for measuring the temperature of the return water passing through the air conditioner, and the flow rate measurement procedure. The measured return flow when the measured valve passing flow rate is less than the design maximum flow rate and the measured return water temperature measured by the return water temperature measurement procedure during cooling operation is lower than the design return water temperature or during heating operation. When the water temperature is higher than the design return water temperature, the measured return water temperature is higher than the design return water temperature during cooling operation, and the measured return water temperature is lower than the design return water temperature during heating operation. Ba This is the pressure of cold / warm water sent from the pump to the air conditioner based on the valve opening degree restricting procedure for restricting the valve opening degree and the control state of the air conditioner determined by the valve opening degree and the valve passage flow rate. A water supply pressure control procedure for controlling the water supply pressure.

  According to the present invention, when the measured valve passage flow rate exceeds the design maximum flow rate, the flow rate request exceeds the design maximum flow rate due to an error in temperature / humidity setting (overcooling, overheating), etc. Even if this occurs, the flow rate through the valve can be suppressed to be equal to or lower than the design maximum flow rate, and an increase in energy consumption due to an increase in pump conveyance power can be suppressed. In addition, in the present invention, the temperature difference between cold and hot water can be ensured at the inlet and outlet of the air conditioner by suppressing the flow rate through the valve to be equal to or less than the design maximum flow rate, thereby improving the operating efficiency of the heat source device. It is possible to suppress the increase in energy consumption of the heat source machine. Furthermore, in the present invention, it is not necessary to take a method such as removing the valve opening degree of the system having a large required flow rate from the determination index of water supply control or weakening the weighting in the water supply control, and it is possible to save labor on site work. .

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

[First Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an air conditioning control system according to the first embodiment of the present invention.
The air-conditioning control system of FIG. 1 includes a cold / hot water generator for generating cold / hot water, heat source devices 1-1, 1-2 such as a heat pump, a refrigerator, and a boiler, and auxiliary devices for the heat source devices 1-1, 1-2. Primary pumps 2-1 and 2-2, forward headers 3-1 and 3-2 for mixing cold / hot water from a plurality of heat source devices 1-1 and 1-2, a water supply pipeline 4, and an air conditioner 5-1 to 5-3, valves 6-1 to 6-3 for controlling the flow rate of the cold / hot water supplied to the air conditioners 5-1 to 5-3, the return water pipe 7, and the air conditioner 5-1. ˜5-3, the return path header 8 to which the cold / hot water sent through the return water pipe 7 is returned, and the secondary pump 9− provided between the forward path headers 3-1 and 3-2. 1, 9-2, a bypass valve 10 provided between the forward headers 3-1 and 3-2, and a pressure sensor 11 for measuring the water supply pressure at the end of the piping system Supply air temperature sensors 12-1 to 12-3 for measuring the temperature of the supply air sent from the air conditioners 5-1 to 5-3, and the temperature of the return water that has passed through the air conditioners 5-1 to 5-3 The amount of cold / hot water supplied to the air conditioners 5-1 to 5-3 is controlled by adjusting the return water temperature sensor (return water temperature measuring means) 13 to be measured and the openings of the valves 6-1 to 6-3. The air-conditioning control device 14 that performs this operation and the water-feeding control device 15 that controls the pumps 9-1 and 9-2 that send cold / hot water to the air-conditioners 5-1 to 5-3 are configured.

  The valves 6-1 to 6-3 are provided with a flow rate sensor (flow rate measuring means) that measures the flow rate of the cold / hot water that passes through the valves 6-1 to 6-3, respectively. The secondary pumps 9-1 and 9-2 include inverters 9-1a and 9-2a, respectively.

  Heat medium (water supply) such as cold water or hot water pressure-fed by the primary pumps 2-1 and 2-2 and added with heat by the heat source devices 1-1 and 1-2 is sent to the forward header 3-1, Pumped by pumps 9-1 and 9-2, supplied to the water supply line 4 through the forward header 3-2, passed through the air conditioners 5-1 to 5-3 and returned as return water by the return water pipe 7. It reaches the header 8 and is again pumped by the pumps 2-1 and 2-2. Thus, cold / hot water circulates through the above path.

  In the above description, the end of the piping system is either in the vicinity of the valve installed at the highest place in the building or in the vicinity of the valve having the longest routing distance from the pump. Which of these should be chosen can be determined appropriately by the building. The place for measuring the water supply pressure may be anywhere as long as it is a pipe between the pump and the valve, but it is particularly desirable to measure at the end of the pipe system. In other words, since the end of the piping system is the place most susceptible to the drop in water pressure due to pressure loss in the pipe, if the water pressure here is controlled so as to satisfy the predetermined value, the predetermined water pressure is satisfied in all piping systems. It becomes possible to make it.

FIG. 2 is a block diagram illustrating a configuration example of the air conditioning control device 14. The air conditioning control device 14 is measured by the supply air temperature receiver 140 that receives the value of the supply air temperature measured by the supply air temperature sensors 12-1 to 12-3 and the flow rate sensors of the valves 6-1 to 6-3. A flow rate receiving unit 141 that receives the value of the flow rate, a return water temperature receiving unit 142 that receives the value of the return water temperature measured by the return water temperature sensor 13, and a temperature setting value set by a user or a person in charge of building management A setting unit 143 that receives (or a humidity setting value), a storage unit 144 that stores in advance a design maximum flow rate value of cold / hot water flowing through the air conditioners 5-1 to 5-3, and a design return water temperature value; A calculation unit 145 for determining a set flow rate of the cold / hot water supplied to the air conditioners 5-1 to 5-3 and determining a control state (air conditioner control status) of the air conditioners 5-1 to 5-3; Based on the set flow rate determined by 145, valves 6-1 to 6-1 A valve control unit 146 for controlling -3 opening, and a air conditioner control status transmission unit 147 transmits the air conditioner control status to the water supply control unit 15.
The calculation unit 145 and the valve control unit 146 constitute air conditioning control means and valve opening restriction means.

  FIG. 3 is a block diagram illustrating a configuration example of the water supply control device 15. The water supply control device 15 includes a water supply pressure receiving unit 150 that receives the value of the water supply pressure measured by the pressure sensor 11, an air conditioner control status receiving unit 151 that receives the air conditioner control status transmitted from the air conditioning control device 14, and A calculation unit 152 that determines the set water supply pressure based on the air conditioner control status, and the secondary pumps 9-1 and 9- via the inverters 9-1a and 9-2a based on the set water supply pressure determined by the calculation unit 152. And a pump control unit 153 that controls the rotation speed of 2 (hereinafter referred to as 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 for determining the air conditioner control status by the air conditioning control device 14, FIG. 6 is a flowchart showing the operation of the water supply control device 15, and FIG. It is a flowchart which shows the determination method of the comprehensive water supply status by the apparatus 15.

The air conditioners 5-1 to 5-3 receive the supply of cold water or hot water from the heat source devices 1-1 and 1-2 and generate a mixture of air (return air) returning from the room serving as the air conditioning control area and the outside air. Cool or heat and feed the cooled or heated supply air into the room.
The supply air temperature receiver 140 of the air conditioning controller 14 receives an intake air temperature signal indicating the supply air temperature measured by the supply air temperature sensors 12-1 to 12-3 (step S1 in FIG. 4).

The computing unit 145 calculates the set flow rate of the valves 6-1 to 6-3 so that the temperature set value set by the setting unit 143 matches the value of the supply air temperature received by the supply air temperature receiving unit 140. (Step S2). That is, the calculation unit 145 obtains the set flow rate by, for example, PID calculation based on the deviation between the temperature set value and the supply air temperature. The calculation unit 145 calculates such a set flow rate for each set of the air conditioner and the corresponding supply air temperature sensor.
Note that the humidity of the supply air 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 supply air humidity.

On the other hand, the flow rate receiving unit 141 receives a flow rate signal indicating the flow rate of the cold / hot water through the valves 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 reception unit 141 with the value of the design maximum flow rate stored in the storage unit 144, and the current valve passage flow rate exceeds the design maximum flow rate ( In step S4, the determination is YES), and 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).

  A specific method for limiting the opening of the valves 6-1 to 6-3 is, for example, as follows. When the current valve passing flow rate exceeds the design maximum flow rate and the set flow rate calculated in step S2 is smaller than the current set flow rate and the design maximum flow rate, the calculation unit 145 newly sets the set flow rate calculated in step S2. The set flow rate is updated, and the updated set flow rate is output to the valve control unit 146 to limit the opening of the valves 6-1 to 6-3 (step S5). In addition, when the current valve passage flow rate exceeds the design maximum flow rate and the set flow rate calculated in step S2 is equal to or higher than the current set flow rate or the design maximum flow rate, the calculation unit 145 sets a new design maximum flow rate. By outputting the updated set flow rate to the valve control unit 146 as the set flow rate, the opening degree of the valves 6-1 to 6-3 is limited (step S5).

The valve control unit 146 controls the opening degree of the valves 6-1 to 6-3 so that the current value of the flow rate through the valve matches the set flow rate value output from the calculation unit 145. Thus, 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 for 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. Needless to say.

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 water temperature receiving unit 142 generates a return water temperature signal indicating the return water temperature measured by the return water temperature sensor 13. Receive (step S6).
The calculation unit 145 compares the current return water temperature value received by the return water temperature reception unit 142 with the design return water temperature value stored in the storage unit 144, and the current return water temperature is the design return water temperature. If lower (determination YES in step S7), the openings of the valves 6-1 to 6-3 are limited so that the return water temperature is equal to or higher than the design return water temperature (step S8).

  The specific method for limiting the opening of the valves 6-1 to 6-3 is the same as described above. When the current return water temperature is equal to or higher than the design return water temperature in step S7, the calculation unit 145 sets the set flow rate calculated in step S2 as a new set flow rate, and sends the updated set flow rate to the valve control unit 146. By outputting, the opening degree of the valves 6-1 to 6-3 is controlled (step S9).

  When the current return water temperature is lower than the design return water temperature, the determination YES in step S7 is the case of the cooling operation. In the case of heating operation, when the current return water temperature is higher than the design return water temperature, the determination is YES in step S7, and when the current return water temperature is equal to or lower than the design return water temperature, the determination is NO, step S7. When the determination is YES, the opening degree of the valves 6-1 to 6-3 may be limited so that the return water temperature is equal to or lower than the design return water temperature. Needless to say, the design return water temperature is set separately for cold water (cooling operation) and hot water (heating operation).

  After the processing of steps S5, S8, and S9 is completed, the calculation unit 145 changes 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. It determines (step S10), and transmits this air-conditioner control status to the water supply control apparatus 15 via the air-conditioner control status transmission part 147 (step S11). The method for determining the air conditioner control status in step S10 will be described with reference to FIG.

  First, the calculation unit 145 checks whether or not the fully open state of the valves 6-1 to 6-3 has been held for a predetermined time (for example, 5 minutes) (step S21 in FIG. 5). The air conditioner control status of the corresponding air conditioner is set to “excess water supply pressure” (step S22). In addition, when the valves 6-1 to 6-3 are kept in the fully open state for a predetermined time, the calculation unit 145 indicates that the flow rate is insufficient (the actual valve passing flow rate is less than the set flow rate) for a predetermined time ( It is checked whether or not the data is held (for example, 5 minutes) (step S23).

  If the insufficient flow rate state is not maintained for a predetermined time, the calculation unit 145 sets the air conditioner control status of the corresponding air conditioner to “optimum water supply pressure” (step S24), and the insufficient flow rate state is maintained for a predetermined time. The air conditioner control status of the corresponding air conditioner is set to “insufficient water supply pressure” (step S25). Thus, the process of step S10 is completed. The calculating part 145 performs the process of step S10, S11 for every air conditioner 5-1 to 5-3 (every valve 6-1 to 6-3).

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

Next, operation | movement of the water supply control apparatus 15 is demonstrated using FIG. 6, FIG. The air conditioner control status reception unit 151 of the water supply control device 15 receives the air conditioner control status sent from the air conditioning control device 14 (step S31 in FIG. 6).
The computing unit 152 of the water supply control device 15 determines the total water supply state (total water supply status) based on the received air conditioner control status (step S32). A method for determining the overall water supply status in step S32 will be described with reference to FIG.

  First, the calculation unit 152 checks whether there is at least one “insufficient water supply pressure” in the air conditioner control status of each of the air conditioners 5-1 to 5-3 (step S41 in FIG. 7). If there is at least one, the overall water supply status is determined as “water supply pressure shortage” (step S42). When the air conditioner control status of each of the air conditioners 5-1 to 5-3 does not include “insufficient water supply pressure”, the arithmetic unit 152 checks the number of “excess water supply pressure” (step S43), and “excess water supply pressure”. Is equal to or greater than the set number (one in this embodiment), the total water supply status is determined as “water supply pressure excess” (step S44). If the number of “excess water supply pressure” is less than the set number, the calculation unit 152 determines the total water supply status as “optimum water supply pressure” (step S45). Thus, the process of step S32 is completed.

  Next, the calculating part 152 determines setting water supply pressure based on comprehensive water supply status (step S33 of FIG. 6). The method for determining the set water supply pressure is, for example, as follows. If the total water supply status is “optimum water supply pressure”, the calculation unit 152 maintains the current set water supply pressure without being changed (step S33). Further, when the total water supply status is “insufficient water supply pressure”, the calculation unit 152 sets a value obtained by adding a predetermined set value change amount ΔP to the current set water supply pressure as a new set water supply pressure (step S33). Further, when the total water supply status is “excess water supply pressure”, the arithmetic unit 152 sets a value obtained by subtracting the predetermined set value change amount ΔP from the current set water supply pressure as a new set water supply pressure (step S33).

The water supply pressure receiving unit 150 of the water supply control device 15 receives a water supply pressure signal indicating the water supply pressure measured by the pressure sensor 11 (step S34).
And the calculating part 152 controls a water supply pressure by outputting the value of the setting water supply pressure determined by step S33 to the pump control part 153 (step S35). The pump control unit 153 is connected to the inverters of the secondary pumps 9-1 and 9-2 via 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. Control the number of revolutions.
The water supply control device 15 repeatedly performs the processes in steps S31 to S35 shown in FIG. 6 as described above until the system stops operating (YES in step S36 in FIG. 6).

  As described above, in the present embodiment, when the measured valve passage flow rate exceeds the design maximum flow rate, the opening degree of the valves 6-1 to 6-3 is limited, so that the temperature / humidity setting error (excessive cooling, Even if a flow rate request exceeding the design maximum flow rate occurs due to overheating, etc., the valve passage flow rate can be suppressed to be less than or equal to the design maximum flow rate, and an increase in energy consumption due to an increase in pump conveyance power can be suppressed. Can do. Moreover, in this Embodiment, the temperature difference of cold / warm water can be ensured by the inlet_port | entrance and exit of air conditioner 5-1 to 5-3 by suppressing so that a valve | bulb passage flow volume may become below a design maximum flow volume. Therefore, the operating efficiency of the heat source devices 1-1 and 1-2 can be improved, and an increase in energy consumption of the heat source devices 1-1 and 1-2 can be suppressed. In addition, in this embodiment, it is not necessary to take a method such as removing the valve opening degree of the system having a large required flow rate from the determination index of water supply control or weakening the weighting in the water supply control, so that the work on site is saved. Can do.

  In the present embodiment, the measured return water temperature when the measured valve passing flow rate is less than or equal to the design maximum flow rate and the measured return water temperature measured during the cooling operation is lower than the design return water temperature or during the heating operation. Is higher than the design return water temperature, by restricting the opening of the valves 6-1 to 6-3, the flow rate through the valve can be suppressed when the flow rate is excessive with respect to the air conditioning load. As a result, in this embodiment, the temperature difference between the cold and hot water can be secured at the inlets and outlets of the air conditioners 5-1 to 5-3, so that the operating efficiency of the heat source devices 1-1 and 1-2 is improved. It is possible to suppress the increase in the energy consumption of the heat source devices 1-1 and 1-2.

Further, by incorporating the flow rate sensor in the valves 6-1 to 6-3 as in the present embodiment, it is not necessary to install the flow rate sensor on the pipe, and the objects to which the present invention is applied can be expanded.
In addition, although this Embodiment demonstrated as an example applied 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, this Embodiment The primary pumps 2-1 to 2-3 may be controlled in the same manner as described above.

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

  The present invention can be applied to air conditioning control.

It is a block diagram which shows the structure of the air-conditioning control system which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structural example of the air-conditioning control apparatus of the air-conditioning control system of FIG. It is a block diagram which shows the structural example of the water supply control apparatus of the air-conditioning control system of FIG. It is a flowchart which shows operation | movement of the air-conditioning control apparatus of FIG. It is a flowchart which shows the determination method of the air-conditioner control status by the air-conditioning control apparatus of FIG. It is a flowchart which shows operation | movement of the water supply control apparatus of FIG. It is a flowchart which shows the determination method of the comprehensive water supply status by the water supply control apparatus of FIG.

Explanation of symbols

  1-1, 1-2 ... heat source machine, 2-1, 2-2 ... primary pump, 3-1, 3-2 ... forward header, 4 ... water supply pipe, 5-1-5-3 ... air conditioner, 6-1 to 6-3 ... valve, 7 ... return water pipe, 8 ... return path header, 9-1, 9-2 ... secondary pump, 9-1a, 9-2a ... inverter, 10 ... bypass valve, 11 DESCRIPTION OF SYMBOLS ... Pressure sensor, 12-1 to 12-3 ... Supply air temperature sensor, 13 ... Return water temperature sensor, 14 ... Air-conditioning control device, 15 ... Water supply control device, 140 ... Supply air temperature receiving part, 141 ... Flow rate receiving part, 142 ... Return water temperature receiving unit, 143 ... Setting unit, 144 ... Storage unit, 145 ... Calculating unit, 146 ... Valve control unit, 147 ... Air conditioner control status sending unit, 150 ... Water pressure receiving unit, 151 ... Air conditioner control Status receiving unit, 152... Arithmetic unit, 153.

Claims (4)

A pump that delivers cold and hot water;
An air conditioner that receives the supply of cold and hot water; and
A valve for controlling the flow rate of cold and hot water supplied to the air conditioner;
Flow rate measuring means for measuring the flow rate of cold and hot water passing through the valve;
Air conditioning control means for controlling the opening of the valve based on the deviation between the temperature of the supply air sent from the air conditioner and the set temperature;
A valve opening restriction means for restricting the valve opening so that the valve passage flow rate is equal to or less than the design maximum flow rate when the valve passage flow rate measured by the flow rate measurement unit exceeds a design maximum flow rate;
Water supply pressure control means for controlling the water supply pressure, which is the pressure of cold / hot water sent from the pump to the air conditioner, based on the control state of the air conditioner determined by the valve opening and the valve passage flow rate. Air conditioning control system characterized by A pump that delivers cold and hot water;
An air conditioner that receives the supply of cold and hot water; and
A valve for controlling the flow rate of cold and hot water supplied to the air conditioner;
Flow rate measuring means for measuring the flow rate of cold and hot water passing through the valve;
Return water temperature measuring means for measuring the temperature of the return water that has passed through the air conditioner;
Air conditioning control means for controlling the opening of the valve based on the deviation between the temperature of the supply air sent from the air conditioner and the set temperature;
When the valve passing flow rate measured by the flow rate measuring means is less than or equal to the design maximum flow rate and the measured return water temperature measured by the return water temperature measuring means during cooling operation is lower than the designed return water temperature or in heating operation When the measured return water temperature is higher than the design return water temperature, the measured return water temperature is higher than the design return water temperature during cooling operation, and the measured return water temperature is lower than the design return water temperature during heating operation. A valve opening restriction means for restricting the valve opening so as to be,
Water supply pressure control means for controlling the water supply pressure, which is the pressure of cold / hot water sent from the pump to the air conditioner, based on the control state of the air conditioner determined by the valve opening and the valve passage flow rate. Air conditioning control system characterized by In an air conditioning control system comprising a pump that delivers cold / hot water, an air conditioner that receives the supply of cold / hot water, and a valve that controls the flow rate of the cold / hot water supplied to the air conditioner, the opening degree of the valve is controlled. An air conditioning control method for
An air-conditioning control procedure for controlling the opening of the valve based on the deviation between the temperature of the supply air sent from the air conditioner and the set temperature;
A flow rate measurement procedure for measuring the flow rate of cold and hot water passing through the valve;
A valve opening restriction procedure for restricting the valve opening so that the valve passage flow is less than or equal to the design maximum flow when the valve passage flow measured by the flow measurement procedure exceeds the design maximum flow;
A water supply pressure control procedure for controlling a water supply pressure, which is a pressure of cold / hot water sent from the pump to the air conditioner, based on a control state of the air conditioner determined by the valve opening degree and the valve passage flow rate. An air conditioning control method. In an air conditioning control system comprising a pump that delivers cold / hot water, an air conditioner that receives the supply of cold / hot water, and a valve that controls the flow rate of the cold / hot water supplied to the air conditioner, the opening degree of the valve is controlled. An air conditioning control method for
An air-conditioning control procedure for controlling the opening of the valve based on the deviation between the temperature of the supply air sent from the air conditioner and the set temperature;
A flow rate measurement procedure for measuring the flow rate of cold and hot water passing through the valve;
Return water temperature measurement procedure for measuring the temperature of the return water that has passed through the air conditioner;
When the valve passing flow rate measured by the flow rate measurement procedure is less than or equal to the design maximum flow rate and the measured return water temperature measured by the return water temperature measurement procedure during cooling operation is lower than the design return water temperature or in heating operation When the measured return water temperature is higher than the design return water temperature, the measured return water temperature is higher than the design return water temperature during cooling operation, and the measured return water temperature is lower than the design return water temperature during heating operation. A valve opening restriction procedure for restricting the valve opening so that
A water supply pressure control procedure for controlling a water supply pressure, which is a pressure of cold / hot water sent from the pump to the air conditioner, based on a control state of the air conditioner determined by the valve opening degree and the valve passage flow rate. An air conditioning control method.

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