JP4155930B2 - Air conditioning control device and operation control method for air conditioning equipment - Google Patents

Description

  The present invention relates to an energy saving technology in a space such as a store, and more particularly to an energy saving technology in a space in which cooling equipment and air conditioning equipment are mixed.

In order to save energy (hereinafter referred to as “energy saving”) of the air conditioner, it is necessary to adjust the set temperature or shorten the operation time. In order to make efficient use of energy resources, techniques for energy saving have been proposed. As one of such technologies, there has been proposed a technology for achieving energy saving while keeping the room temperature appropriate by intermittently operating air conditioners in various buildings such as intelligent buildings and office buildings (for example, patents). Reference 1).
JP-A-9-217953

  In stores such as convenience stores that sell food, air-conditioning equipment such as air conditioners and refrigeration equipment such as freezing and refrigeration showcases are mixed. There is a great need for developing energy-saving technologies in stores, but in reality, store staff are working to save energy by turning on and off the air conditioner manually.

  The air conditioner and the cooling apparatus are in a relationship in which one operation state affects the other operation state. From the viewpoint of food quality maintenance, it is not preferable to stop the operation of the refrigeration equipment. Therefore, to save energy, the operation of the air conditioning equipment is stopped. At this time, generally, if the air conditioning equipment is not operated at all, the amount of heat applied to the refrigeration equipment increases, and the temperature control by the air conditioning is not performed, so the comfort in the store is impaired.

  The present invention has been made in view of such problems, and an object of the present invention is to save energy by appropriately intermittently operating the air conditioner in a space where electric devices such as an air conditioner and a cooling apparatus are mixed. It is to provide a technology for realizing the conversion.

  In order to solve the above problems, an aspect of the present invention provides an air conditioning control device that controls the operation of an air conditioning device in a space where the air conditioning device and an electrical device that absorbs or releases heat are present. The air conditioning control device includes a first heat quantity calculation unit that calculates a load heat amount applied to an electrical device, a second heat amount calculation unit that calculates a load heat amount applied to the air conditioner, a first heat amount calculation unit, and a second heat amount calculation unit. Based on the calculation results, the calculation results by the first power amount calculation unit, the first heat amount calculation unit, and the second heat amount calculation unit that calculate the power consumption amount of the air conditioner and the electric device when the air conditioner is intermittently operated are shown. Based on the calculation results of the second power amount calculation unit, the first power amount calculation unit, and the second power amount calculation unit that calculate the power consumption amount of the air conditioner and electric device when the operation of the air conditioner is not stopped. An operation control unit that schedules the operation time and the operation stop time of the air conditioner so that the total power consumption of the air conditioner and the electric device is smaller than the total power consumption when the operation is not stopped. And be prepared That. Air conditioning equipment and electrical equipment are in a relationship in which one operating state affects the other, but this air conditioning control device allows for proper intermittent operation of the air conditioning equipment with this relationship in mind. It becomes.

  The space is a substantially sealed space formed in, for example, a store or a room. The substantially sealed space means a substantially closed space that is not open to the outside in a normal state, and includes a floor where a food department of a department store is provided in addition to the store. In addition, the substantially sealed space should just be a substantially closed space as a whole, and is a concept including a space where there is a connection port with the outside in part.

  The electric device is a device that absorbs or discharges heat in addition to the air conditioner in a space where the air conditioner exists, and examples thereof include a cooling device such as a showcase in a food store. Note that the electrical device is not installed for the purpose of absorbing or releasing heat in the space, but may be one that absorbs or releases heat as a result of operation. Electrical equipment includes not only refrigeration equipment that absorbs heat, but also equipment that releases heat into the space, such as equipment for warming drink cans at convenience stores.

  Another aspect of the present invention provides an air conditioning control device that controls the operation of an air conditioning device in a space where the air conditioning device and an electrical device that absorbs or releases heat are present. The air conditioning control device includes a first heat quantity calculation unit that calculates a load heat amount applied to an electrical device, a second heat amount calculation unit that calculates a load heat amount applied to the air conditioner, a first heat amount calculation unit, and a second heat amount calculation unit. Based on the calculation result, the first power amount calculation unit that calculates the power consumption of the air conditioner and the electric device when the air conditioner is intermittently operated, and the air conditioner based on the calculation result by the first power amount calculation unit An operation control unit that schedules the operation time and the operation stop time of the air conditioner is provided so as to minimize the total power consumption of the device and the electric device. Air conditioning equipment and electrical equipment are in a relationship in which one operating state affects the other, but this air conditioning control device allows for proper intermittent operation of the air conditioning device, taking this relationship into account. It becomes.

  It should be noted that any combination of the above-described constituent elements and a conversion of the expression of the present invention between a method, an apparatus, a system, a recording medium, a computer program, etc. are also effective as an aspect of the present invention.

  According to the present invention, it is possible to realize energy saving of the entire space by appropriately controlling the operation of the air conditioner in the substantially sealed space where the air conditioner and the electric device that absorbs or releases heat are present. .

  The air-conditioning control device in the embodiment of the present invention can save energy by appropriately controlling the power on / off of the air-conditioning equipment in a substantially sealed space such as a store where electric equipment such as air-conditioning equipment and cooling equipment is mixed. Realize. In the following embodiment, an energy saving technology in an environment of a food store where air conditioners and cooling showcases are mixed will be described.

  FIG. 1 shows the configuration of the store system 1. The store system 1 includes an air conditioning control device 10, an air conditioner 12, a refrigeration device 14, and an outside temperature / humidity sensor 16. The air-conditioning control apparatus 10 in the present embodiment controls the operation of the air-conditioning equipment 12 so that the overall power consumption of the air-conditioning equipment 12 and the cooling equipment 14 is reduced. Although one each of the air conditioning equipment 12 and the cooling equipment 14 is shown, a plurality of air conditioning equipments may exist, and in that case, the air conditioning control device 10 controls the operation of the plurality of air conditioning equipment 12.

  The air conditioning control device 10 includes a communication unit 18, a load heat amount management unit 20, a power amount management unit 40, and an operation control unit 50. The load heat amount management unit 20 includes a heat amount calculation unit 22, a data processing unit 24, and a change amount calculation unit 26. The heat amount calculation unit 22 includes a store load heat amount calculation unit 30, a refrigeration equipment load heat amount calculation unit 32, and an air conditioner. A load calorie calculation unit 34 is included. The power amount management unit 40 includes a refrigeration equipment power consumption calculation unit 42 and an air conditioning equipment power consumption calculation unit 44. The operation control unit 50 includes a stop time calculation unit 52 and a control signal transmission instruction unit 54.

  The operation control function of the air conditioner 12 in the store system 1 of the present embodiment is realized by the CPU, the memory, a program loaded in the memory, and the like in the air conditioner control device 10, and here, functional blocks realized by their cooperation are shown. I'm drawing. The program may be built in the air conditioning control device 10 or may be supplied from the outside in a form stored in a recording medium. The air-conditioning control device 10 may exist as a dedicated controller that comprehensively controls devices such as the air-conditioning device 12 and the cooling device 14 in the store system 1, and functions by downloading an intended program. It may exist as a general-purpose machine such as a personal computer. Accordingly, those skilled in the art will understand that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof.

  The air conditioner 12 includes an in-store temperature / humidity sensor, and measures the temperature and humidity in the store. The refrigeration equipment 14 includes an internal temperature and humidity sensor, and measures the temperature and humidity in the showcase. The store outside temperature and humidity sensor 16 measures the temperature and humidity outside the store. Each measurement data is transmitted to the communication unit 18, and the communication unit 18 sends each measurement data to the data processing unit 24. Data communication between the communication unit 18 and the air conditioner 12 may be wired communication via a cable or wireless communication.

The data processing unit 24 converts the measurement data from each sensor into a format for calculation by the calorific value calculation unit 22 and provides it to the calorific value calculation unit 22. In heat operating unit 22 stores the load heat calculator 30 first is based on the inside and outside the store temperature and humidity data store, data such as amount of sunlight, to calculate the heat load Q _all according to the store. The temperature / humidity data uses measured values measured by each sensor. The amount of sunshine is extracted by searching from a database in which past statistical data is classified under conditions such as weather and season. The load heat quantity Q _all [kJ] applied to the store can be obtained by a known calculation formula using the following elements. In the present embodiment, the calculation is performed in units of one hour, and the load heat amount Q _all for one hour from the present time is calculated by the air conditioner 12 on the assumption that the temperature is maintained at a desired set temperature.
(1) Conducted heat due to temperature difference: Calculated from the temperature difference outside the store, inside the store, and the heat passage rate of walls, glass, etc. (2) Solar radiant heat: Calculated from the amount of sunlight and the heat pass rate of the glass window 3) Outside air load: derived from differences in enthalpy outside and inside the store derived from temperature and humidity (4) Internal heat generation: heat generated from human body and equipment Q _all is derived from (1) to (4) Calculated as the sum of elements.

The refrigeration equipment load heat quantity calculation unit 32 calculates the load heat quantity Q _SC [kJ] applied to the refrigeration equipment 14 over one hour based on the internal temperature and humidity data of the refrigeration equipment 14 and the store temperature and humidity data. To do. Heat load Q _SC is calculated from the difference between the respective enthalpy the internal temperature and humidity data and store temperature and humidity data. The load heat quantity Q _SC applied to the refrigeration equipment 14, that is, the load heat quantity Q _SC processed by the refrigeration equipment 14, corresponds to energy necessary to maintain the temperature and humidity in the showcase at a desired value, that is, the set temperature and humidity. . The air conditioner load heat amount calculation unit 34 calculates the load heat amount Q _AC [kJ] required for the air conditioner 12 to maintain the set temperature and humidity for one hour. The load heat quantity Q _AC applied to the air conditioner 12, that is, the load heat quantity Q _AC processed by the air conditioner 12, corresponds to the energy required to maintain the temperature and humidity in the store at a desired value, that is, the set temperature and humidity. In the model of the present embodiment, when the air conditioner 12 is not stopped, the load heat quantity Q _all applied to the store is processed by the air conditioner 12 and the cooling apparatus 14 operated so as to maintain the set temperature and humidity. And therefore
Q _all = Q _SC + Q _AC
Is established. Thereby, the load heat quantity Q _AC when the air conditioner 12 is continuously operated can be represented by (Q _all −Q _SC ). As described above, it is possible to obtain the load heat amount Q _AC of the air conditioner 12 and the load heat amount Q _SC of the cooling device 14 when the air conditioner 12 is not stopped for one hour.

In electric energy management unit 40, the cold設機unit power consumption calculation unit 42 calculates the power consumption W _SC cold設機14 from heat load Q _SC. Similarly, air conditioner power consumption calculation unit 44 calculates the power consumption W _AC of air conditioners 12 from heat load Q _AC.

The stop time calculation unit 52 calculates and stores the power consumption amount W _all when the air conditioner 12 is not stopped by a calculation formula of (power consumption amount W _SC + power consumption amount W _AC ). The power consumption amount W _all when the air conditioner 12 is not stopped is a reference for comparison with the estimation result of the power consumption amount when the air conditioner 12 is intermittently operated.

Next, the power consumption amount W _all in the case of intermittent operation is calculated so that the air conditioner 12 is stopped for T minutes during one hour. Here, the intermittent operation means an operation in which the power supply of the air conditioner 12 is turned off at least once in one hour, and the period in which the air conditioner 12 is stopped in one hour is one time. It does not matter whether it is multiple times. The air-conditioning control device 10 detects how many minutes the air-conditioning equipment 12 is stopped and the total power consumption W _all is minimized. The downtime by performing the calculation of the W _all while increments ΔT min, and it will seek the optimum stop time T. Set to 1 minute ΔT in this example, that is, when stopped 1 minute of an hour, if you stopped 2 minutes, and performs calculation of W _all in 1 minute increments, continued operation until when stopping 60 minutes. As a matter of course, starting from the case of stopping for 60 minutes, the calculation of _Wall may be performed in increments of 1 minute until stopping for 1 minute. The amount of power consumption W _all when stopped for time T is expressed as W _all (T). Note that W _all when not stopped, that is, when T = 0, is expressed as W _all (0).

When the air conditioner 12 is stopped for T minutes during one hour, the change amount calculation unit 26 calculates the temperature and humidity that change due to the stop of the air conditioner 12 by calculation. First, the change amount calculation unit 26 calculates a load heat amount Q _rem [kJ] that is not processed by the air conditioner 12. Q _rem is
Q _rem = (Q _all −Q _SC ) × (T / 60)
It is expressed as By stopping the air conditioning equipment 12, in-store temperature and humidity becomes vary from set temperature and humidity, the heat load Q _rem is used to determine and estimate the in-store temperature and humidity after the change. Since Q _all and Q _SC are also functions of the temperature and humidity in the store, Q _rem cannot be obtained at this point. For the sake of simplicity, in the following, it is assumed that only the temperature is changed by Q _rem without considering the humidity change by Q _rem . If the temperature of the store air after changing by Q _rem is t _in2 [° C],
Q _rem = m × C _p × (t _in2 −t _in1 )
It becomes. The temperature t _in2 is calculated from the two equations for Q _rem .
m: _Stored air mass C _p : Constant pressure specific heat t _in1 : Set temperature.

Note that the humidity φ _in2 [%] of the in-store air that is changed by Q _rem can be calculated from the saturated water vapor pressure and the absolute humidity.

The store load heat amount calculation unit 30 calculates the load heat amount Q _all (T) applied to the store using the estimated store temperature t _in2 and store humidity φ _in2 . As described above, in this embodiment, the change in the humidity φ _in2 is not considered. When T = 0, the actual temperature / humidity data provided from the air conditioner 12 is used as the temperature / humidity data in the store, but when T is not 0, the estimated temperature / humidity data t in the store. _{Use in2} and _φin2 . Similarly, the refrigeration equipment load heat amount calculation unit 32 calculates the load heat amount Q _SC (T) using the temperature and humidity data t _in2 and φ _in2 in the store.

Subsequently, the amount of heat applied to the air conditioner 12 is calculated separately for energy for returning the estimated temperature and humidity to the set temperature and humidity, and thereafter for maintaining the set temperature and humidity. That is, the air conditioning equipment load heat amount calculation unit 34 calculates the amount of heat Q _ret (T) [kJ] necessary for returning the load heat quantity applied to the air conditioning equipment 12 to the set temperature and humidity. After the restart of operation (60-T), the calculation is performed separately for the load heat quantity Q _AC necessary to maintain the set temperature and humidity.
Q _ret (T) = m × C _p × (t _in2 −t _in1 )
Q _AC (T) = (Q _all (T) −Q _SC (T)) × ((60−T) / 60)

As described above, the load heat amount (Q _ret (T) + Q _AC (T)) applied to the air conditioner 12 when the operation is stopped for T minutes in one hour can be obtained. The refrigeration equipment power consumption calculation unit 42 in the electric energy management unit 40 is based on Q _SC (T) calculated in the refrigeration equipment load heat quantity calculation unit 32 and uses the power consumption W _SC ( T) is calculated. Further, the air conditioning equipment power consumption calculation unit 44 uses the power consumption W _AC (air conditioner 12 _AC ) based on (Q _ret (T) + Q _AC (T)) calculated by the air conditioning equipment load heat quantity calculation unit 34. T) is calculated. The refrigeration equipment power consumption calculation unit 42 and the air conditioning equipment power consumption calculation unit 44 perform calculations using the load-power consumption characteristic curves of the air conditioning equipment 12 and the refrigeration equipment 14, respectively. The calculated W _SC (T) and W _AC (T) are sent to the stop time calculation unit 52 of the operation control unit 50, and the stop time calculation unit 52 adds W _SC (T) and W _AC (T). The power consumption amount W _all (T) is calculated.

In the air-conditioning control apparatus 10, the change amount calculation unit 26 calculates the change amount in each stop time in which the stop time T is set in increments of 1 minute from 1 minute to 60 minutes, and the stop time calculation unit 52 The amount W _all (T) is calculated and compared with the reference power consumption amount W _all (0). When W _all (T) <W _all (0) is satisfied, if the operation of the air conditioner 12 is stopped for T minutes in one hour, the total power consumption is compared with the case where the air conditioner 12 is not stopped. It turns out that it becomes small. Therefore, the stop time calculation unit 52 may obtain the time T for establishing W _all (T) <W _all (0) as the operation stop time. It is preferable that intermittent operation with high energy efficiency is performed by selecting T that satisfies W _all (T) <W _all (0) and minimizes W _all (T). It becomes possible. The control signal transmission instruction unit 54 transmits an operation stop signal for T minutes to the air conditioner 12 through the communication unit 18. The air conditioner 12 receives the operation stop signal and stops the operation for T minutes. After stopping for T minutes, the air conditioner 12 is operated so as to follow the set temperature and humidity.

FIG. 2 shows an air conditioner control flow according to the embodiment. First, the operation stop time T of the air conditioner 12 is determined (S10), and the operation of the air conditioner 12 is stopped (S12). During shutdown, it determines the actual room temperature t _{In2_now} current, by calculating the difference between t _{In2_cal} of every minute that is previously calculated in the calculation, whether the difference is equal to or less than the threshold value alpha (S14) . This is a step corresponding to the case of using the air-conditioning device 12 as a cooling device in the summer, if winter determines whether the difference of t _{In2_now} and t _{In2_cal} is equal to or larger than the threshold beta. Whether it is summer or winter is determined by whether the mode set in the air conditioner 12 is “cooling” or “heating”. The determination in S14 is always performed during the stop period. When the difference falls outside the predetermined range at a certain timing (N in S14), the operation stop time T is determined again. In this case, it may wait until the temperature and humidity return to the set value, but the time T may be determined from a state deviated from the set value. When set in summer for example, alpha = 0, it is preferred the present room temperature t _{In2_now} equals the estimated room temperature _t in2_cal, for example even the current room temperature t _{In2_now} following estimated room temperature _t in2_cal, climate than expected There is no problem in summer because it is in a lowered state. On the other hand, if the current room temperature t _{in2_now} is equal to or greater than the estimated room temperature t _{in2_cal} , the current room temperature is higher than predicted. If it is slightly higher, there is no problem, but if t _{in2_now} is much larger than t _{in2_cal} , it is necessary to cancel the operation stop of the air conditioner 12 and restart the operation. Thus, the threshold value α is set in the sense that the deviation from the calculated value is allowable. The same applies to the threshold value β in the winter season.

  If the predetermined condition for the difference is always satisfied while the operation is stopped (Y in S14), after the time T has elapsed, the operation of the air conditioner 12 is terminated (S16) and the operation is resumed. In this example, an intermittent operation is performed in which the operation for the first T minutes is stopped in one hour and the operation is restarted for the remaining (60-T) minutes. In this case, T minutes may be divided into a plurality of times to increase on / off switching, and intermittent operation may be performed so that the operation stop period becomes T minutes as a whole. When switching on and off once, the off period becomes longer and the amount of change in temperature and humidity after T minutes may increase, but when switching on and off in multiple steps, Since the amount of change in temperature and humidity during the off period can be reduced, the possibility of impairing comfort can be reduced.

FIG. 3 shows a detailed flow of S10 for determining the operation stop time T shown in FIG. First, the initial value of the operation stop time T of the air conditioner 12 is set to 0 (S20). Further, the initial values of the in-store temperature t _in2 (T) and the humidity φ _in2 (T) estimated T minutes after the operation of the air conditioner 12 is stopped are set to the set temperature t _{in2_set} and the set value of the air conditioner 12, respectively. Set the humidity to φ _{in2_set} . In addition, although the air conditioning apparatus 12 which can also adjust humidity is assumed here, the air conditioning apparatus 12 which can adjust only temperature may be sufficient.

First, in T = 0, to calculate the calculate the heat load Q _all (T) according to the store per hour (S22), cold設機14 in such a heat load _{Q SC (T) (S24)} . Next, the load heat quantity Q _rem (T) contributing to the temperature change is calculated (S28). When T = 0, since the operation of the air conditioner 12 is not stopped, no temperature change occurs due to the operation stop, and Q _rem (T) becomes zero. Subsequently, based on Q _rem (T), the in-store temperature t _in2 (T) and the in-store humidity φ _in2 (T) estimated after T minutes of stoppage are calculated (S30). When T = 0, the in-store temperature t _in2 (T) and the in-store humidity φ _in2 (T) are equal to the set temperature t _{in2_set} and the set humidity φ _{in2_set} . Subsequently, W _SC (T) of the refrigeration equipment 14 is calculated based on the load heat quantity Q _SC (T) (S26).

Next, based on the in-store temperature t _in2 (T), a load heat quantity Q _ret (T) required for returning to room temperature is calculated (S32). Although only the temperature is considered here, when the humidity is also restored, Q _ret (T) is calculated in consideration of the humidity restoration energy. With Q _ret (T), the room temperature returns to the set temperature _{tin2_set} , and for the remaining (60-T), the amount of load heat Q _AC (T) necessary for maintaining the room temperature is calculated (S34). When T = 0, Q _ret (T) is 0. Based on Q _ret (T) and Q _AC (T), the power consumption W _AC (T) of the air conditioner 12 is calculated (S36). W _SC (T) and W _AC (T) are added, and the total power consumption W _all (T) of the air conditioner 12 and the cooling apparatus 14 is obtained (S44).

If T is smaller than 60 (Y in S38), that is, whether the estimated in-store temperature t _in2 (T) is equal to or lower than the threshold value a within a range in which the stop time T does not exceed 1 hour (60 minutes). Determine (S40). This is the case in summer, and the threshold value a is set to a value that does not impair comfort in summer. In winter, in S40, it is determined whether or not the temperature t _in2 (T) is equal to or higher than the threshold value b. Thereby, energy saving can be efficiently realized without impairing the original function of the air conditioner 12. When this condition is satisfied (Y in S40), T is incremented by ΔT (for example, 1 minute), and the steps from S22 to S40 are repeated again.

When T is not 0, that is, when simulating intermittent operation of the air conditioner 12, it is possible to estimate each load heat quantity by estimating the amount of change in temperature and humidity. When the air conditioner 12 is stopped, the room temperature rises in summer and the room temperature falls in winter. The change amount calculation unit 26 calculates the change in temperature and humidity, and responds to the change in temperature and humidity. Thus, by obtaining Q _all (T) for the store and Q _SC (T) for the refrigeration equipment 14, the power consumption amount W _all (T) at each stop time T can be obtained.

In S42, T is incremented by ΔT, and in T38, when T exceeds 60 (N in S38), the minimum value of W _all (T) is searched from T = 0 to 60. (S46). In S40, even when the temperature condition is not satisfied (N in S40), the step of S46 is executed. Thereby, the optimal stop time T is determined (S48), and the operation time and the operation stop time of the air conditioner 12 are scheduled. If it is determined in S48 that T = 0 is the optimum stop time, it is shown that the smallest power consumption can be realized by always operating the air conditioner 12, and T = 60 is the optimum stop time. When determined, it indicates that the smallest amount of power consumption can be realized by not operating the air conditioner 12 for one hour. In addition, when the optimum T is derived in the range of 0 <T <60, the smallest power consumption can be realized by performing the intermittent operation with the T as a stop time.

  In the above, this invention was demonstrated based on the Example. The present invention is not limited to this embodiment, and various modifications thereof are also effective as an embodiment of the present invention.

  For example, in the embodiment, the optimum operation stop time T in one hour is derived, but the time T in a predetermined time other than one hour such as 30 minutes and two hours may be derived. In addition to calculating the time T at the predetermined time, an optimal operation time when the operation stop time T is set to 5 minutes, for example, may be obtained. In any case, it is only necessary to perform optimal scheduling of the operation time and the operation stop time, and the ratio between the operation time and the operation stop time T may be determined as an example of the method. As a result of scheduling, whether to determine the operation stop time T for a predetermined operation time, to determine the operation time for the predetermined operation stop time T, or to determine the operation stop time T for a predetermined time, Also good.

  In the above-described embodiment, the case where the time for calculating the operation stop time T is fixed (1 hour) has been described. However, as a modification, the time for calculating the time T may be variable. In this modified example, the time for calculating the time T is referred to as “cycle time”. For example, the cycle time is determined using the temperature difference between the inside and outside of the store as a key, and the operation time and the operation stop time T at the cycle time are obtained, and then the next cycle time is determined based on the temperature difference between the inside and outside of the store. Then, the operation time and the operation stop time T in the cycle time may be obtained one after another. As described above, in the modification, the cycle time is set based on the temperature difference between the indoor and the outdoor. Specifically, when the temperature difference is large, the cycle time is shortened, and when the temperature difference is small, the cycle time is lengthened. By shortening the cycle time, it becomes possible to perform energy-saving control so that the amount of temperature change during operation stop does not increase, and by increasing the cycle time, the number of on / off operations can be reduced and control can be simplified. Can be realized.

FIG. 4 shows a control flow for determining the cycle time. First, a temperature difference t _dif between indoor and outdoor temperatures is _obtained from the outdoor temperature t _out and the indoor temperature t _{in2_now} (S60). This temperature difference t _dif is compared with a threshold value c1 (S62). If it is smaller than the threshold c1 (Y in S62), the cycle time is determined as t _c1 (S64). If it is greater than or equal to the threshold c1 (N in S62), it is determined whether the temperature difference t _dif is greater than or equal to the threshold c1 and smaller than the threshold c2 (S66). If it is not less than the threshold c1 and smaller than the threshold c2 (Y in S66), the cycle time is determined as t _c2 (S68). If it is greater than or equal to the threshold c2 (N in S66), it is determined whether the temperature difference t _dif is greater than or equal to the threshold c2 and smaller than the threshold c3 (S70). If it is not less than the threshold value c2 and smaller than the threshold value c3 (Y in S70), the cycle time is determined as t _c3 (S72). If it is equal to or greater than the threshold value c3 (N in S70), the temperature difference t _dif is compared with other threshold values to determine the cycle time. Note that t _c3 <t _c2 <t _c1 . In this way, by taking short enough cycle time is larger temperature difference t _dif, it is possible to reduce the amount of temperature change per time due to shutdown, it is possible to reduce the possibility of damage to comfort.

Further, as described with respect to the embodiment, the calculated time T may be divided into a plurality of times, and ON / OFF switching during the cycle time may be performed a plurality of times. In this case, the division method may be determined based on the temperature difference t _dif . When the time T is divided equally and distributed at equal time intervals during one hour, the room temperature change amount may increase if the stop time width is large. When the temperature difference t _dif is large, by narrowing the stop time width immediately after the stop of the intermittently operated air conditioner 12 in the previous cycle time and setting the respective stop time widths so as to gradually widen the division width, The degree of temperature change per hour can be reduced. Further, when the temperature difference t _dif is large, the number of divisions may be increased as compared with the case where the temperature difference t _dif is small. This also makes it possible to reduce the degree of temperature change per hour.

  In addition, when there are a plurality of air conditioners 12, the air conditioning control device 10 may control the operations of the plurality of air conditioners 12 all at once. For example, after the plurality of air conditioners 12 are stopped simultaneously, From the relationship between the load and the processing capacity of each air conditioner 12, the operation of the plurality of air conditioners 12 may be individually controlled so that the air conditioner 12 is most efficiently operated. The capacity of the air conditioner 12 is expressed by, for example, a rated output or a COP (Coefficient of Performance) value at an indoor load condition of 27 ° C. and 60%. In operation outside the indoor load condition, the COP The value may be worse, that is, the power consumption may be excessive. COP means energy consumption efficiency. The higher the value, the better the energy efficiency, and less power is required to process the same load heat.

  When there are a plurality of air conditioners 12 having different COP values, it is more efficient to restart the air conditioners 12 one by one than to start all the air conditioners 12 all at once from the operation stop state. May go up. The air-conditioning control device 10 restarts all the air-conditioning devices 12 at the same time, and restarts the operation from the air-conditioning device 12 having the highest COP value, for example. It is also possible to select the one that consumes less power by comparing with the case where the other air-conditioning equipment is restarted after the efficiency is obtained. This is because the operation control unit 50 schedules the operation of each air conditioner 12 so that the overall power consumption is reduced based on the values calculated by the air conditioner load heat amount calculator 34 and the air conditioner power consumption calculator 44. It is realized by doing. As an example, the air conditioner 12 may be started to operate in descending order of COP. As described above, the operation control unit 50 can realize the energy saving of the entire space more efficiently by scheduling the operation based on the COP of each air conditioner 12 or the like.

It is a lineblock diagram of a store system. It is a control flow of an air conditioner. It is a flow for determining the operation stop time. It is a control flow which determines cycle time.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Store system, 10 ... Air-conditioning control apparatus, 12 ... Air-conditioning equipment, 14 ... Refrigeration equipment, 16 ... Outside temperature / humidity sensor, 18 ... Communication part, 20 ... Load heat amount management unit, 22 ... calorie calculation unit, 24 ... data processing unit, 26 ... change amount calculation unit, 30 ... store load heat amount calculation unit, 32 ... cold equipment load heat amount Calculation unit 34... Air conditioning equipment load calorific value calculation unit 40... Electric energy management unit 42. Cooling equipment power consumption calculation unit 44. Air conditioning equipment power consumption calculation unit 50. -Operation control part, 52 ... stop time calculation part, 54 ... control signal transmission instruction | indication part.

Claims (15)

And air-conditioning equipment, the air conditioning control device for controlling the operation of air conditioners in the space Hiya設 apparatus for performing absorption of heat is present,
A first heat quantity calculating unit for calculating a heat load applied to the Hiya設 equipment,
A second calorific value calculation unit for calculating the amount of heat applied to the air conditioner;
A change amount calculation unit for calculating a change amount of the space temperature when the air conditioner is stopped;
Air conditioning in the case where the first heat quantity calculation unit and the second heat quantity calculation unit calculate the load heat amount using the temperature change amount calculated by the change amount calculation unit, respectively , and the air conditioner is intermittently operated. a first power amount calculation unit for calculating the power consumption of the device and Hiya設 equipment,
Based on the calculation result by the first heat quantity calculating unit and the second heat quantity calculating unit, a second power amount calculating unit for calculating a power consumption amount of the air-conditioning equipment and Hiya設 equipment when not stopping the operation of the air-conditioning equipment,
Based on the calculation result by the first power calculating section and the second power amount calculating unit, the power consumption of the entire air-conditioning equipment and Hiya設 equipment, so as to be smaller than power consumption of the whole in the case of not stopping the operation And an operation control unit that schedules the operation time and the operation stop time of the air conditioner,
An air-conditioning control device comprising: And air-conditioning equipment, the air conditioning control device for controlling the operation of air conditioners in the space Hiya設 apparatus for performing absorption of heat is present,
A first heat quantity calculating unit for calculating a heat load applied to the Hiya設 equipment,
A second calorific value calculation unit for calculating the amount of heat applied to the air conditioner;
A change amount calculation unit for calculating a change amount of the space temperature when the air conditioner is stopped;
Air conditioning in the case where the first heat quantity calculation unit and the second heat quantity calculation unit calculate the load heat amount using the temperature change amount calculated by the change amount calculation unit, respectively , and the air conditioner is intermittently operated. a first power amount calculation unit for calculating the power consumption of the device and Hiya設 equipment,
Based on the calculation result by the first power amount calculating unit, the power consumption of the whole air conditioning equipment and Hiya設 equipment so as to minimize the operation control unit which performs scheduling operation time and operation stop time of the air conditioning equipment ,
An air-conditioning control device comprising: The change amount calculation unit calculates the amount of load heat that is no longer processed by the air conditioner due to the stop of the air conditioner, calculates the change amount of the space temperature based on the calculation result,
The first calorific value calculation unit calculates the amount of heat applied to the refrigeration equipment when the operation of the air conditioning equipment is stopped,
The second heat quantity calculation unit calculates a load heat quantity required for returning to a temperature set after restarting the operation of the air conditioner, and calculates a load heat quantity applied to the air conditioner. Or the air-conditioning control apparatus of 2.   The air-conditioning control apparatus according to claim 1, wherein the operation control unit derives an operation stop time at a predetermined time.   The air conditioning control device according to any one of claims 1 to 3, wherein the operation control unit determines a ratio between an operation time and an operation stop time. A first calculation step of calculating the heat load exerted on Hiya設 equipment,
A second calculation step for calculating the amount of heat applied to the air conditioner;
A third calculation step for calculating the amount of change in space temperature when the air conditioner is stopped;
The air conditioner when the operation of the air conditioner is intermittently operated based on the load heat amount calculated in each of the first calculation step and the second calculation step using the temperature change amount calculated in the third calculation step. and calculating a power consumption amount of Hiya設 equipment,
Based on the heat load calculated in each of the first calculation step and the second calculation step, and calculating the power consumption of air conditioners and Hiya設 equipment when not stopping the operation of the air-conditioning equipment,
The power consumption of the entire air-conditioning equipment and Hiya設 equipment, so as to be smaller than power consumption of the whole when not shut down, and performing a scheduling operation time and operation stop time of the air conditioner,
An air conditioner operation control method comprising: A first calculation step of calculating the heat load exerted on Hiya設 equipment,
A second calculation step for calculating the amount of heat applied to the air conditioner;
A third calculation step for calculating the amount of change in space temperature when the air conditioner is stopped;
The air conditioner when the operation of the air conditioner is intermittently operated based on the load heat amount calculated in each of the first calculation step and the second calculation step using the temperature change amount calculated in the third calculation step. and calculating a power consumption amount of Hiya設 equipment,
Based on the calculated power consumption amount, the power consumption of the whole air conditioning equipment and Hiya設 equipment so as to minimize, and performing scheduling operation time and operation stop time of the air conditioner,
An air conditioner operation control method comprising: The third calculation step includes a step of calculating a load heat amount that is no longer processed by the air conditioner due to the stop of the air conditioner, and calculating a change amount of the space temperature based on the calculation result,
The first calculation step includes a step of calculating a load heat amount applied to the refrigeration equipment when the operation of the air conditioning equipment is stopped,
The second calculation step includes a step of calculating a load heat amount required for returning to a set temperature after restarting the operation of the air conditioner and calculating a load heat amount applied to the air conditioner. The operation control method for an air conditioner according to claim 6 or 7.   The operation control method for an air conditioner according to any one of claims 6 to 8, wherein the step of performing scheduling includes a step of deriving an operation stop time at a predetermined time.   9. The operation control method for an air conditioner according to claim 6, wherein the step of performing scheduling includes a step of determining a ratio between an operation time and an operation stop time. On the computer,
A function of calculating the heat load exerted on Hiya設 equipment,
A function to calculate the amount of heat applied to the air conditioner;
A function to calculate the amount of change in space temperature when the air conditioner is stopped,
The heat load applied to the heat load and the air conditioning equipment according to the calculated cold設機device using the calculated temperature change amount on the basis of the power consumption of air conditioners and Hiya設 equipment in the case of intermittent operation with the operation of the air conditioning equipment A function to calculate,
Based on the heat load applied to the heat load and the air conditioning equipment according to the calculated cold設機device, a function of calculating power consumption of air conditioners and Hiya設 equipment when not stopping the operation of the air-conditioning equipment,
The power consumption of the entire air-conditioning equipment and Hiya設 equipment, so as to be smaller than power consumption of the whole when not shut down, the function of scheduling the operation time and operation stop time of the air conditioner,
A program for running On the computer,
A function of calculating the heat load exerted on Hiya設 equipment,
A function to calculate the amount of heat applied to the air conditioner;
A function to calculate the amount of change in space temperature when the air conditioner is stopped,
The heat load applied to the heat load and the air conditioning equipment according to the cold設機device which is calculated using the calculated temperature change amount on the basis of the power consumption of air conditioners and Hiya設 equipment in the case of intermittent operation with the operation of the air conditioning equipment With the ability to calculate
Based on the calculated power consumption amount, and function so as to minimize the power consumption of the entire air-conditioning equipment and Hiya設 device performs scheduling operation time and the operation stop time of the air conditioner,
A program for running The function of calculating the amount of change in the space temperature includes a function of calculating the amount of load heat that is no longer processed by the air conditioner due to the stop of the air conditioner, and calculating the amount of change in the space temperature based on the calculation result,
The function of calculating the amount of heat applied to the refrigeration equipment includes a function of calculating the amount of heat applied to the refrigeration equipment when the operation of the air conditioning equipment is stopped.
The function of calculating the amount of heat applied to the air conditioner includes a function of calculating the amount of heat applied to the air conditioner by calculating the amount of heat required to return to the set temperature after restarting the operation of the air conditioner. The program according to claim 11 or 12, characterized in that:   The program according to claim 11, further causing a computer to execute a function of deriving an operation stop time at a predetermined time.   The program according to claim 11, further causing a computer to execute a function of determining a ratio between an operation time and an operation stop time.

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