JP2008151437A - Air-conditioning equipment operation control device and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely control restraint of energy supply to air-conditioning equipment even in a starting time zone of the air-conditioning equipment. <P>SOLUTION: A central monitor 15 measures energy supply from heat supply equipment to the air-conditioning equipment, and calculates a restraint ratio according to the energy supply so that the energy supply is not over a target capacity. The central monitor 15 selects a restraining means executing the restraint of heat load from a plurality of restraining means restraining the heat load of the air-conditioning equipment according to a time zone. When the present time zone is a time zone of steady operation of an air conditioner 5, at least one of a temperature set value and a CO<SB>2</SB>concentration set value is eased according to the restraint ratio, and when the present time zone is a starting time zone of the air conditioner 5, an opening of an air conditioner control valve 10 capable of more directly controlling the energy supply, is suppressed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air conditioner operation control apparatus and method for controlling an air conditioner so that the amount of energy supplied to the air conditioner that operates by receiving heat supply from the heat supply facility does not exceed a target capacity.

Conventionally, in buildings where energy is supplied from a district heating and cooling (DHC) system using a heat medium such as cold water, steam, or hot water, heat is supplied so that the energy supply does not exceed the target capacity. Demand control is performed (for example, refer to Patent Document 1). In the control system disclosed in Patent Document 1, the total load fluctuation of the demand side air conditioning equipment is predicted, and when this predicted value exceeds the step increase set value, the air conditioning target set value of the demand side air conditioning equipment is heated within the comfort zone. By automatically updating in the direction of reducing the load, the increase in the heat load was regulated to improve the thermal efficiency of the air conditioning equipment and save energy.
As a technique for suppressing the heat load of the air conditioning equipment, for example, Patent Document 2 describes that the cooling set temperature of the air conditioning equipment is raised in the case of cooling, and the heating set temperature is lowered in the case of heating.

JP 2003-139372 A JP-A-9-243140

  As in the technique described in Patent Document 2, in the method of suppressing the thermal load of the air conditioning equipment by relaxing the temperature setting value, even if trying to relax the temperature setting value by measuring the energy supply amount at the time of starting the air conditioning equipment Since the amount of energy supplied to the air conditioning equipment increases abruptly during the time zone when the air conditioning equipment is activated, there is a possibility that the amount of energy supply will exceed the target capacity before the set value is relaxed. In this case, a method of previously suppressing the temperature setting value at the time of startup is conceivable. However, depending on the initial control amount at the time of startup (the temperature of the room that is the target of air conditioning control), the energy supply amount still has the target capacity. It sometimes exceeded.

  The present invention has been made to solve the above-described problem, and provides an air conditioning equipment operation control apparatus and method that can surely control the amount of energy supplied to an air conditioning equipment even during the time zone when the air conditioning equipment is activated. The purpose is to provide.

The present invention provides an air conditioning facility operation for controlling the air conditioning facility so that an energy supply amount to an air conditioning facility that operates by receiving heat supply from the heat supply facility does not exceed a target capacity indicating a maximum energy supply amount that can be supplied. A control device that measures the amount of energy supplied from the heat supply facility to the air-conditioning facility; and according to the energy supply amount so that the measured energy supply amount does not exceed the target capacity A suppression rate calculation means for calculating a suppression rate, a plurality of suppression means for suppressing the thermal load of the air conditioning equipment according to the suppression rate, and a suppression means for executing thermal load suppression from the plurality of suppression means A load suppression determination unit that selects according to a time zone and causes the selected suppression unit to execute thermal load suppression according to the suppression rate is provided.
Moreover, in one structural example of the air-conditioning equipment operation control apparatus of this invention, the said load suppression determination means is the said air-conditioning equipment according to the said suppression rate, when the present time zone is the steady operation time zone of the said air-conditioning equipment. When the first suppression unit that relaxes the set value related to heat consumption is selected as the suppression unit that should perform the thermal load suppression, and the current time zone is the startup time zone of the air conditioning equipment, the first suppression unit The second suppression unit that can directly control the energy supply amount is selected as the suppression unit that should execute the thermal load suppression.
Moreover, in one structural example of the air-conditioning-equipment operation control apparatus of this invention, when the present time zone is the said starting time zone, the said 2nd suppression means is from the upper limit set value for steady operation time zones as an operation upper limit value. If the current time zone is switched from the startup time zone to the steady operation time zone, the startup time zone upper limit set value is set at the predetermined change rate. It returns to the upper limit set value for the operation time zone.
The energy supply amount is a load heat amount of the air conditioning facility or a flow rate of a heat medium supplied from the heat supply facility to the air conditioning facility.

  The air conditioning facility operation control method of the present invention includes a measurement procedure for measuring an energy supply amount from the heat supply facility to the air conditioning facility, and the measured energy supply amount so as not to exceed the target capacity. A suppression rate calculation procedure for calculating a suppression rate according to the amount of energy supply, and a suppression unit that should execute thermal load suppression from among a plurality of suppression units that suppress the thermal load of the air conditioning equipment according to the suppression rate. A load suppression determination procedure for selecting according to the band and causing the selected suppression means to execute the suppression of the thermal load according to the suppression rate is repeatedly executed.

  According to the present invention, a suppression unit that should perform thermal load suppression is selected from a plurality of suppression units according to a time zone, and the selected suppression unit is configured to perform thermal load suppression according to the suppression rate. As a result, it is possible to appropriately select a suppression means having a large energy saving effect according to the time zone, so that it is possible to reliably prevent the energy supply amount from exceeding the target capacity even during the time zone when the air conditioning equipment is activated. , Can contribute to energy saving.

  Further, in the present invention, when the current time zone is the steady operation time zone of the air conditioning equipment, the first suppression means for relaxing the set value relating to the heat consumption of the air conditioning equipment according to the suppression rate is executed to suppress the thermal load. If the current time zone is the startup time zone of the air conditioning equipment, the second suppression unit that can directly control the amount of energy supply than the first suppression unit performs thermal load suppression. By selecting as the suppression means to be performed, it is possible to reliably prevent the energy supply amount from exceeding the target capacity even in the time zone when the air conditioning equipment is activated.

  Further, in the present invention, when the current time zone is the startup time zone, the second suppression means uses the startup time zone upper limit setting value lower than the steady operation time zone upper limit setting value as the operation upper limit value, When the current time zone is switched from the startup time zone to the steady operation time zone, the startup time zone upper limit set value is returned to the steady operation time zone upper limit set value at a predetermined rate of change. Energy suppression can be realized.

  Relaxing the temperature setting value to control the heat load of the air conditioning equipment will manage the final temperature indication value, so the impact on the environment can be anticipated, but the temperature of the room will be the temperature setting value. In the control logic for following the above, the temperature set value is not a parameter that directly handles the energy supply amount to the air conditioning equipment. That is, the temperature setting value is an instruction value for the environment, not an instruction value for energy. This is the cause of the problem that the amount of energy supply exceeds the target capacity when the air conditioning equipment is started.

  Therefore, in the present invention, when priority is given to the suppression of the thermal load over the comfort of air conditioning, the parameter that can directly manipulate the energy supply amount is changed. Considering the structure of the control logic, since the opening degree of the control valve of the air conditioning equipment is a parameter that directly indicates energy, the opening degree of the valve is suppressed when the air conditioning equipment is started.

  Moreover, since the controllability with respect to the temperature set value is lost while directly operating the energy supply amount, a deviation occurs between the temperature of the room to be air-conditioned and the temperature set value. Therefore, when switching the thermal load suppression means from valve opening suppression to temperature setpoint relaxation, a large change occurs in the valve opening to compensate for this deviation, resulting in a rebound of energy supply. There is a problem of end. Therefore, in the present invention, when the opening degree of the valve is operated, rebound of the energy supply amount is suppressed by providing a restriction on the change range and the change speed.

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 facility according to an embodiment of the present invention.
In FIG. 1, 1 is a heat exchanger that receives a heat medium such as cold water, steam, and hot water from a DHC system (heat supply equipment) (not shown), 2 is a reception control valve that controls the amount of heat medium received, and 3 is a heat exchanger. 1 is a sensor for measuring the temperature (or flow rate) of cold water or hot water on the secondary side of 1, 4 is a controller for controlling the reception control valve 2, 5 is an air conditioner, 6 is an outside air damper for controlling the introduction amount of outside air OA, 7 Is a return air damper that controls the amount of return air RA introduced, 8 is a coil that cools or heats air with cold or hot water sent from the heat exchanger 1, 9 is a fan that sends air cooled or heated by the coil 8, 10 is an air conditioner control valve for controlling the flow rate of cold water or hot water sent from the heat exchanger 1, 11 is a room to be air-conditioned, 12 is a temperature sensor for measuring the temperature of the room 11, and 13 is CO ₂ of the room 11. Measure concentration O ₂ concentration sensor, 14 a controller for controlling the damper 6, 7 and the air conditioner control valve 10, 15 is a central monitoring system for monitoring the overall air conditioning facilities, 16 measures the temperature of the heating medium supplied from the DHC system temperature Sensor, 17 is a flow sensor that measures the flow rate of the heat medium, 18 is a temperature sensor that measures the temperature of the heat medium that returns to the DHC system, 19 is an exhaust damper that controls the amount of exhaust EA, 20 is a humidifier, and 21 is a humidifier. A humidifying valve 22 for controlling the flow rate of cold water or hot water sent to the vessel 20 is a humidity sensor for measuring the humidity of the living room 11. The controllers 4 and 14 and the central monitoring device 15 constitute an air conditioning equipment operation control device that controls the air conditioning equipment.

  Next, the operation of the air conditioning equipment of FIG. 1 will be described. First, a heat medium such as cold water, steam, or hot water is supplied from the DHC system (not shown) to the primary side of the heat exchanger 1. The heat exchanger 1 cools or heats the water on the secondary side with this heat medium. Here, the sensor 3 measures the temperature (or flow rate) of cold water or hot water on the secondary side sent out from the heat exchanger 1. And the controller 4 feedback-controls the opening degree of the reception control valve 2 so that the temperature (or flow rate) of cold water or hot water becomes a predetermined cold / hot water temperature setting value (or cold / hot water flow rate setting value).

  Cold water or hot water sent out from the heat exchanger 1 is supplied to the coil 8 of the air conditioner 5 through the air conditioner control valve 10. The coil 8 cools or heats the outside air OA and the return air RA with this cold water or hot water. Cold water or hot water used in the coil 8 is returned to the heat exchanger 1. Further, the cold water or the hot water sent out from the heat exchanger 1 is supplied to the humidifier 20 through the humidification valve 21. The humidifier 20 controls the humidity of the supply air SA cooled or heated by the coil 8 by creating a water spray state. The supply air SA cooled or heated by the coil 8 and humidified by the humidifier 20 is sent out to the living room 11 by the fan 9. Part of the air in the living room 11 is returned to the air conditioner 5 as return air RA.

Temperature sensor 12 measures the temperature of the room 11, the CO ₂ concentration sensor 13, the CO ₂ concentration in the room 11 is measured, the humidity sensor 22 measures the humidity of the room 11. Then, the controller 14, the temperature and CO ₂ concentration in the room 11 is such that each becomes a predetermined set value, feedback control of the opening degree of the opening and the outside air damper 6 of the air conditioner control valve 10. Moreover, the controller 14 feedback-controls the opening degree of the humidification valve 21 so that the humidity of the living room 11 becomes a predetermined humidity set value.

Next, the thermal demand control of this Embodiment applied to the air conditioning equipment of FIG. 1 is demonstrated. FIG. 2 is a flowchart showing the flow of the thermal demand control process of the present embodiment, and FIG. 3 is a block diagram showing a configuration example of the central monitoring device 15.
The central monitoring device 15 includes a load calorie measurement unit 150, a smoothing processing unit 151, a suppression rate calculation unit 152, and a load suppression determination unit 153.

The central monitoring device 15 performs the processing of FIG. 2 at regular operation intervals. First, the load heat quantity measuring means 150 of the central monitoring device 15 measures the instantaneous value of the load heat quantity of the air conditioning equipment of FIG. 1 (step S1 in FIG. 2). The temperature Tr of the heat medium supplied from the DHC system is measured by the temperature sensor 16, and the flow rate F of the heat medium is measured by the flow rate sensor 17. Further, the temperature Ts of the heat medium returning to the DHC system is measured by the temperature sensor 18. These measurement data are sent to the central monitoring device 15 through the controller 4. The load heat quantity measuring means 150 calculates an instantaneous value Q of the load heat quantity from the temperature data and flow rate data of the heat medium as shown in the following equation.
Q = F × (Tr−Ts) × λ (1)
In the formula (1), λ is a specific heat.

  Subsequently, the smoothing processing unit 151 smoothes the instantaneous value Q of the load heat amount measured by the load heat amount measuring unit 150 (step S2). Since the instantaneous value Q of the load heat amount varies greatly, the instantaneous value is smoothed before the subsequent processing. As the smoothing processing, there are arithmetic processing using a first-order lag filter and moving average arithmetic processing. In the calculation process by the first-order lag filter, the smooth value of the load heat amount is calculated by the previous value and the current value of the load heat amount and a preset smoothing coefficient. In the moving average calculation process, the moving average value of the load heat quantity for the past n minutes (for example, n = 1 to 10) is calculated as a smooth value.

  Next, the suppression rate calculation means 152 determines whether or not the load heat amount that has been smoothed is equal to or less than a target capacity (contract capacity) that indicates the maximum load heat amount that can be used in the air conditioning equipment (step S3). In the following processing, since the load heat amount that has been smoothed is used, the load heat amount that has been smoothed is simply referred to as load heat amount. When the load heat quantity is equal to or less than the target capacity (determination YES in step S3), the suppression rate calculation means 152 determines whether the load heat quantity is equal to or greater than a preset suppression start capacity (suppression start heat quantity) (step S4). The suppression start capacity is set to a value lower than the target capacity. For example, the suppression start capacity is set to about 80% to 90% of the target capacity.

  When the load heat amount is lower than the suppression start capacity (determination NO in step S4), the suppression rate calculation means 152 determines whether the load heat amount is larger than a value obtained by subtracting a predetermined differential from the suppression start capacity (step S5). ). The differential is a set value for determining the width of the dead zone in the floating control, and is set with, for example, about 5% to 10% of the suppression start capacity. When the load heat amount is equal to or less than the value obtained by subtracting the differential from the suppression start capacity (determination NO in step S5), the suppression rate calculation unit 152 determines whether the previously output suppression rate is 0% (step S6). Here, since the suppression rate remains 0%, the determination is YES in step S6, and the process proceeds to the load suppression determination process in step S14. This load suppression determination process will be described later.

  Next, when the load heat amount becomes equal to or greater than the suppression start capacity in step S4, the suppression rate calculation unit 152 increments the operation interval count by 1 (step S7). The initial value of the operation interval count is zero. After counting up the operation interval count, the suppression rate calculation means 152 determines whether or not the operation interval count value has reached a certain value (step S8). If the operation interval count value has not reached a certain value (determination NO in step S8), the previously output suppression rate is continuously output, and the process proceeds to the load suppression determination process in step S14. However, if the previous suppression rate is 0%, the determination is YES in step S8 regardless of the operation interval count value, and the process proceeds to step S9.

  When the state where the load heat amount is equal to or greater than the suppression start capacity continues, the operation interval count value is counted up one after another by repeating the processing of FIG. 2, and eventually reaches a certain value. The suppression rate calculation means 152 resets the operation interval count value to 0 (step S9) when the operation interval count value reaches a certain value or when the previous suppression rate is 0% (determination YES in step S8). A suppression rate corresponding to the amount of load heat is calculated and output (step S10), and the process proceeds to the load suppression determination process in step S14.

Here, a method for calculating the suppression rate will be described. The suppression rate calculation means 152 calculates the step width (upper limit value to be output at a time) when outputting the suppression rate according to the following formula using the preset maximum suppression rate and the number of setbacks.
Step width = maximum suppression rate / setback frequency (2)
The number of setbacks in equation (2) is the number of times to determine how many times the suppression rate is output. For example, if the temperature set value is relaxed by 2 ° C. at the maximum, the setting of how many times the 2 ° C. is relaxed becomes the setback frequency. When the number of setbacks is set to 2 times, the temperature is relaxed by 2 ° C. by 2 times at 1 ° C.

  Then, the suppression rate calculation unit 152 sets a value that is an integer multiple of the step width as the suppression rate according to the current output count of the suppression rate. For example, when the maximum suppression rate is 100% and the number of setbacks is 4, that is, when the step width is 25%, the suppression rate at the first suppression rate output timing (timing at which the operation interval count value becomes a constant value) is The step width is 25% × 1 time = 25%, and the suppression rate at the second suppression rate output timing is step width 25% × 2 times = 50%, and the suppression rate at the third suppression rate output timing is step. The width 25% × 3 times = 75%, and the suppression rate at the fourth suppression rate output timing is step width 25% × 4 times = 100%. In this way, every time the operation interval count value becomes a constant value, the suppression rate according to the step width is output stepwise.

  However, in calculating the suppression rate, it is necessary to determine the current suppression rate with reference to the current output suppression rate. For example, when the current suppression rate is 0%, the first suppression rate is immediately output regardless of the operation interval count value as described above. When the current suppression rate is not 0%, a value that is an integral multiple of the step width is set to exceed the current suppression rate. For example, when the current suppression rate is 43%, when the load heat amount exceeds the suppression start capacity and the suppression rate output timing comes, the current suppression rate is set to 50%. In this case, since the third suppression rate is output, the fourth suppression rate 75% is output at the next suppression rate output timing.

When the load heat amount is equal to or greater than the suppression start capacity, the suppression rate is output every time the operation interval count value becomes a constant value. Moreover, when load calorie | heat amount increases, the suppression rate also increases according to this. Therefore, the suppression rate increases stepwise as the load heat amount increases. The reason why the suppression rate is output stepwise is to prevent excessive load suppression.
The reason for waiting for the calculation of the suppression rate until the operation interval count value reaches a certain value is to wait until the effect of suppressing the thermal load by the suppression rate output immediately before is obtained. By providing an effect waiting time that is an integral multiple of the operation interval, stable thermal load suppression control can be realized.

  On the other hand, when the load heat amount exceeds the target capacity (determination NO in step S3), the suppression rate calculation means 152 outputs a predetermined maximum suppression rate regardless of the operation interval count value (step S11), and the load of step S14. Proceed to the suppression determination process. By performing the maximum thermal load suppression that can be performed at once according to the maximum suppression rate, the thermal load can be rapidly suppressed and reduced below the target capacity.

  When the load suppression control described later is performed by the output of the suppression rate in step S10 or S11, the load heat amount decreases and becomes lower than the suppression start capacity. When the load heat amount is lower than the suppression start capacity and larger than the value obtained by subtracting the differential from the suppression start capacity (determination YES in step S5), the suppression rate calculation means 152 continues the suppression rate output immediately before. And output (step S12), the process proceeds to the load suppression determination process of step S14.

  Next, when the load heat amount becomes equal to or less than the value obtained by subtracting the differential from the suppression start capacity due to a further decrease in the load heat amount (determination NO in step S5), the suppression rate calculation means 152 has a previously output suppression rate of 0. It is determined whether it is% (step S6). Here, since the suppression rate is being output, the determination is NO in step S6, and the process proceeds to step S13.

  When the load heat amount is equal to or less than the value obtained by subtracting the differential from the suppression start capacity and the previously output suppression rate is not 0%, the suppression rate calculating means 152 calculates a value obtained by subtracting a predetermined change rate from the previously output suppression rate. The current suppression rate is calculated (step S13), and the process proceeds to the load suppression determination process in step S14. Therefore, when the state where the load heat amount is equal to or less than the value obtained by subtracting the differential from the suppression start capacity continues, the suppression rate gradually approaches 0% at a predetermined change rate by repeating Step S13.

Next, the load suppression determination process in step S14 by the load suppression determination unit 153 will be described. FIG. 4 is a flowchart for explaining the load suppression determination process.
When the suppression rate is output from the suppression rate calculation unit 152, the load suppression determination unit 153 receives this suppression rate and determines whether the current time zone is the startup time zone or the steady operation time zone of the air conditioner 5 ( FIG. 4 step S15).

  When the current time zone is the start-up time zone of the air conditioner 5, the load suppression judgment unit 153 selects the air conditioner control valve 10 and the controller 14 that is the control mechanism as the thermal load suppression unit (step S16). Then, the load suppression determination unit 153 outputs a preset opening time zone valve opening upper limit set value to the controller 14 as an upper limit value of the opening degree of the air conditioner control valve 10 (step S17). The controller 14 is instructed to suppress the load of the air conditioner, that is, to suppress the opening degree of the air conditioner control valve 10, and the suppression rate is output (step S18). When there are a plurality of air conditioners 5, the activation time zone includes the activation time of the air conditioner 5 activated earliest and the activation time of the air conditioner 5 activated latest. After the start-up time zone has elapsed, it becomes a steady operation time zone.

  The controller 14 suppresses the opening of the air conditioner control valve 10 in accordance with the suppression rate within the range of the starting time period valve opening upper limit set value. That is, the smaller opening of the suppression opening calculated by the suppression opening setting table corresponding to the suppression rate and the opening calculated by feedback control is set as the current opening.

In addition, when the current time zone is the steady operation time zone of the air conditioner 5, the load suppression determination unit 153 sets the temperature setting value and the CO ₂ concentration setting value of the living room 11 and the controller 14 serving as a management mechanism thereof to the heat load. It selects as a suppression means (step S19). Subsequently, the load suppression determination unit 153 determines whether or not it is at the time of switching from the startup time zone to the steady operation time zone (step S20). The load suppression determination unit 153 is configured to set a valve opening upper limit setting value for a normal operation time zone in which a valve opening upper limit setting value is set in advance (valve opening upper limit setting value for starting time zone <valve opening upper limit value for steady operation time zone). If it has not returned to the set value), it is determined that the time is switched from the startup time zone to the steady operation time zone.

When it is determined that the load suppression determination unit 153 is switching from the startup time zone to the steady operation time zone, the current valve opening upper limit setting value is increased at a predetermined change rate, and the changed valve opening upper limit setting value is changed. Is output to the controller 14 (step S21), and the controller 14 is instructed to relax at least one of the temperature setting value and the CO ₂ concentration setting value of the living room 11, and the suppression rate is output (step S22). The controller 14 relaxes at least one of the temperature setting value and the CO ₂ concentration setting value of the living room 11 according to the suppression rate output from the load suppression determination means 153. In other words, in the case of cooling, the temperature set value is increased by the set rate of suppression of the maximum set value relaxation range, and in the case of heating, the temperature set value is decreased by the rate of suppression of the maximum set value relaxation range. As for the CO ₂ concentration set value, the set value is increased by the amount corresponding to the suppression rate of the maximum set value relaxation range.

Thus, when switching from the startup time zone to the steady operation time zone, the startup time zone valve opening upper limit setting value is not immediately switched to the steady operation time zone valve opening upper limit setting value, but the startup time zone valve opening upper limit setting value is not changed. The degree upper limit set value is increased at a predetermined rate of change and gradually approaches the valve opening upper limit set value for the steady operation time period. Thereby, the opening degree of the air-conditioner control valve 10 also increases gradually.
When the valve opening upper limit set value returns to the steady operation time zone valve opening upper limit set value in step S20, the load suppression determination means 153 is not at the time of switching from the startup time zone to the steady operation time zone. Determination is made and the output of the valve opening upper limit set value for the steady operation time zone is maintained (step S23).

  In this way, the heat load is suppressed. FIG. 5 is a waveform diagram showing an operation example of the heat demand control of the present embodiment, and an example of changes in the load heat amount, the suppression rate, the opening degree of the air conditioner control valve 10, the temperature of the room 11, and the temperature set value. Show. 50 in FIG. 5 is a value obtained by subtracting the differential from the suppression start capacity. Further, the period between time t1 and time t9 in FIG. 5 is the air conditioner start-up time zone, and the time after time t9 is the air conditioner steady operation time zone.

  First, when the air conditioner 5 is activated at time t1 in FIG. 5, the opening degree of the air conditioner control valve 10 is set to the valve opening upper limit setting value for the activation time period. When the load heat amount increases and the load heat amount becomes equal to or greater than the suppression start capacity at time t2, the suppression rate increases step by step by a process of steps S7 to S10. Since the period from time t1 to t9 is the air conditioner start-up time zone, the opening degree of the air conditioner control valve 10 is suppressed stepwise according to the suppression rate. The load heat quantity decreases due to the suppression of the opening degree of the air conditioner control valve 10, and the load heat quantity is smaller than the suppression start capacity and larger than the value obtained by subtracting the differential from the suppression start capacity between times t3 and t4. Therefore, since the value of the suppression rate is held by the process of step S12, the opening degree of the air conditioner control valve 10 is also held.

  Next, when the load heat amount becomes equal to or less than the value obtained by subtracting the differential from the suppression start capacity at time t4, the suppression rate is decreased at a predetermined change rate by the process of step S13. Due to the decrease in the suppression rate, the opening degree of the air conditioner control valve 10 increases at a predetermined change rate, and a heat amount rebound in which the load heat amount temporarily increases occurs. Thereby, between time t5 and t6, since the load calorie | heat amount becomes larger than the value which pulled the differential from the suppression start capacity | capacitance, the value of the suppression rate is hold | maintained by the process of step S12, and the opening degree of the air-conditioner control valve 10 is set. Is also retained.

  When the load heat quantity becomes equal to or less than the value obtained by subtracting the differential from the suppression start capacity at time t6, the suppression rate is decreased again by the process of step S13, and the opening degree of the air conditioner control valve 10 is increased. The operations at times t7 and t8 are the same as those at times t5 and t6, respectively. Thus, the load heat quantity becomes equal to or less than the value obtained by subtracting the differential from the suppression start capacity at time t8, the suppression rate reduced at time t8 returns to 0%, and the opening degree of the air conditioner control valve 10 is the valve opening degree for the start time period. Return to the upper limit value. According to the example of FIG. 5, it can be seen that the amount of heat rebound when the suppression rate is lowered is small, and the return of the load heat amount is suppressed.

  Since the air conditioner steady operation time zone is reached when time t9 is reached, the controller 14 changes the opening degree of the air conditioner control valve 10 from the start time zone valve opening upper limit set value to the steady operation time zone valve opening upper limit set value. However, instead of immediately switching to the normal operation time zone valve opening upper limit set value at this time, the opening degree of the air conditioner control valve 10 is increased at a predetermined rate of change, so that the valve opening degree for the normal operation time zone is increased. Gradually approach the upper limit set value.

  Next, when the load heat amount becomes equal to or greater than the suppression start capacity at time t10, the suppression rate increases step by step by a process of steps S7 to S10. Since the air conditioner steady operation time zone after the time t9, the temperature setting value of the living room 11 is gradually reduced according to the suppression rate. In the example of FIG. 5, since the cooling operation is assumed, the temperature set value increases stepwise. When the temperature setting value is relaxed, the load heat amount decreases, and when the load heat amount becomes equal to or less than the value obtained by subtracting the differential from the suppression start capacity at time t11, the suppression rate decreases at a predetermined change rate by the process of step S13. The relaxation of the temperature setting value of the living room 11 is gradually released at a predetermined change rate due to the decrease of the suppression rate, the suppression rate returns to 0% at time t12, and the temperature setting value of the living room 11 is also set by, for example, a resident. Return to original value.

In FIG. 5, the description of the CO ₂ concentration set value is omitted for the sake of simplicity, but the CO ₂ concentration set value may be operated in the same manner as the temperature set value. In the case of CO ₂ control, the outside air damper opening is operated during the startup time period.
As described above, in this embodiment, since the heat load of the air conditioning equipment is suppressed when the load heat amount reaches the suppression start capacity, the load heat amount should not exceed the target capacity. it can. In addition, by outputting the suppression rate in stages, it is possible to prevent excessive load suppression and maintain comfortable air conditioning, and to achieve stable thermal load suppression control by providing a certain waiting time Can do.

In the present embodiment, when the current time zone is the normal operation time zone of the air conditioner 5, that is, when the load heat amount can be suppressed by relaxing the temperature set value or the CO ₂ concentration set value, the suppression rate is set. Accordingly, by relaxing at least one of the temperature setting value and the CO ₂ concentration setting value, it is possible to maintain a state in which the influence on the environment is easily visible, and when the current time zone is the startup time zone of the air conditioner 5, By suppressing the opening degree of the air conditioner control valve 10 that can directly control the energy supply amount rather than relaxing the set value and the CO ₂ concentration set value, the load heat amount becomes the target capacity even when the air conditioner 5 is started. This can be reliably prevented and contribute to energy saving.

  In the present embodiment, when the current time zone is the startup time zone, the upper limit value of the opening degree of the air conditioner control valve 10 is for the startup time zone lower than the valve opening upper limit set value for the steady operation time zone. When the valve opening upper limit set value is used and the current time zone is switched from the start time zone to the steady operation time zone, the valve opening upper limit set value for the start time zone is used for the steady operation time zone at a predetermined rate of change. It is made to return to the valve opening upper limit set value. The operation of the air conditioner control valve 10 that can directly control the energy supply amount is fast in response speed and has a large influence on the amount of change in opening, so the change range is limited by the upper limit value and the change speed is changed. By restricting by the rate, stable energy suppression can be realized.

In the present embodiment, the temperature setting value and the CO ₂ concentration setting value of the living room 11 are described as examples of setting values related to the heat consumption of the air conditioning equipment, but the present invention is not limited to this, and other settings are possible. Values include humidity setting values and cold / hot water temperature setting values. When the controller 14 selects the means for reducing the humidity set value of the living room 11 during the steady operation time zone of the air conditioner 5 as the suppression means, the humidifying valve 21 and the controller 14 serving as its control mechanism humidify the startup time zone. What is necessary is just to select the means for prohibiting as suppression means. Further, when the controller 4 selects the means for relaxing the chilled / hot water temperature set value as the suppression means during the steady operation time zone, the acceptance control valve 2 and the controller 4 as its control mechanism during the startup time zone. The means for suppressing the opening degree of 2 may be selected as the suppressing means.

In the present embodiment, a single air conditioner is described, but it goes without saying that the present invention can be similarly applied to a plurality of air conditioners. Further, in this embodiment, the explanation is given by taking as an example the suppression of heat demand for DHC consumers who receive heat supply from the DHC system. However, the present invention is not limited to this. The present invention may be applied to a building having a self-heating source.
Further, the flow rate F of the heat medium may be used instead of the load heat quantity Q as the energy supply quantity to be measured. In this case, the target capacity is the target flow rate, and the suppression start capacity is the suppression start flow rate.

  In addition, the central monitoring device 15 and the controllers 4 and 14 of the present embodiment can be realized by a computer having a CPU, a storage device, and an external interface, and a program for controlling these hardware resources. In such a computer, the program for realizing the thermal demand control of the present invention is 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. The CPU writes the program read from the recording medium into the storage device, and executes the above-described processing according to the program.

  The present invention can be applied to a technique for controlling air conditioning equipment.

It is a block diagram which shows the structure of the air conditioning equipment which concerns on embodiment of this invention. It is a flowchart which shows the flow of a process of the heat demand control of embodiment of this invention. It is a block diagram which shows the structural example of the central monitoring apparatus in the air conditioning equipment of FIG. It is a flowchart explaining the load suppression determination process by the load suppression determination means of the central monitoring apparatus of FIG. It is a wave form diagram which shows the operation example of the heat demand control of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Heat exchanger, 2 ... Acceptance control valve, 3 ... Sensor, 4 ... Controller, 5 ... Air conditioner, 6 ... Outside air damper, 7 ... Return air damper, 8 ... Coil, 9 ... Fan, 10 ... Air conditioner control valve , 11 ... room, 12 ... temperature sensor, 13 ... CO ₂ concentration sensor, 14 ... controller, 15 ... building management system, 16, 18 ... temperature sensor, 17 ... flow sensor 19 ... exhaust damper, 20 ... humidifier, 21 DESCRIPTION OF SYMBOLS ... Humidification valve, 22 ... Humidity sensor, 150 ... Load calorie measurement means, 151 ... Smoothing processing means, 152 ... Suppression rate calculation means, 153 ... Load suppression determination means.

Claims (5)

It is an air conditioner operation control device that controls the air conditioner so that the energy supply amount to the air conditioner that operates by receiving heat supply from the heat supply facility does not exceed the target capacity indicating the maximum energy supply amount that can be supplied. And
Measuring means for measuring the amount of energy supplied from the heat supply equipment to the air conditioning equipment;
A suppression rate calculating means for calculating a suppression rate according to the energy supply amount so that the measured energy supply amount does not exceed the target capacity;
A plurality of suppression means for suppressing the thermal load of the air conditioning equipment according to the suppression rate;
A load suppression determination unit that selects a suppression unit that should perform thermal load suppression from the plurality of suppression units according to a time zone, and causes the selected suppression unit to perform thermal load suppression according to the suppression rate; and An air conditioner operation control apparatus comprising: In the air conditioning equipment operation control device according to claim 1,
When the current time zone is a steady operation time zone of the air conditioning facility, the load suppression determination unit is a first suppression unit that relaxes a set value related to heat consumption of the air conditioning facility according to the suppression rate. The second suppression that can be selected as the suppression means that should perform load suppression and that can operate the energy supply amount more directly than the first suppression means when the current time zone is the startup time zone of the air conditioning equipment An air conditioner operation control device is characterized in that a means is selected as a suppression means for executing the thermal load suppression. In the air conditioning equipment operation control device according to claim 2,
When the current time zone is the startup time zone, the second suppression means uses the startup time zone upper limit setting value lower than the steady operation time zone upper limit setting value as the operation upper limit value, and uses the current time zone. Is switched from the startup time zone to the steady operation time zone, the startup time zone upper limit set value is returned to the steady operation time zone upper limit set value at a predetermined rate of change. Operation control device. In the air-conditioning equipment operation control device according to any one of claims 1 to 3,
The energy supply amount is a load heat amount of the air conditioning equipment or a flow rate of a heat medium supplied from the heat supply equipment to the air conditioning equipment. This is an air conditioner operation control method for controlling the air conditioner so that the energy supply amount to the air conditioner that operates by receiving heat supply from the heat supply facility does not exceed the target capacity indicating the maximum energy supply amount that can be supplied. And
A measurement procedure for measuring an energy supply amount from the heat supply facility to the air conditioning facility;
A suppression rate calculation procedure for calculating a suppression rate according to the energy supply amount so that the measured energy supply amount does not exceed the target capacity;
According to the suppression rate, a suppression unit that should perform thermal load suppression is selected from among a plurality of suppression units that suppress the thermal load of the air conditioning equipment according to the time zone, and the suppression rate is added to the selected suppression unit. A method for controlling the operation of an air-conditioning facility, comprising repeatedly executing a load suppression determination procedure for executing a suppression of a thermal load according to the condition.

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