Air conditioning control device and air conditioning control method

Abstract

To reduce a calculation amount.SOLUTION: The air conditioning control device 100 includes the control unit 53 that determines the control content of the indoor unit 30. The control unit 53 acquires the priority of each target space SP and the first information on the range of the set temperature of the indoor unit 30. When the priority of the second space is higher than the priority of the first space, the control unit 53 determines the first temperature range on the basis of the first information such that the first temperature range indicating the range of candidates for the set temperature of the indoor unit 30 installed in the first space is limited with respect to the second temperature range indicating the range of candidates for the set temperature of the indoor unit 30 installed in the second space. The control unit 53 evaluates the operation of the indoor unit 30 installed in the first space when the set temperature of the indoor unit 30 installed in the first space is set to each settable temperature within the first temperature range.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an air conditioning control device and an air conditioning control method. [Background technology]

[0002] Demand control is known for keeping the amount of power demand (amount of power consumption) below a predetermined threshold, which is a target value. Demand control predicts the amount of power demand in a target space to be managed for each predetermined time period, and adjusts the operation of devices that use power based on the prediction. For example, Patent Document 1 (Japanese Patent Publication No. 6596758) discloses a control device that performs optimal air conditioning control by calculating an evaluation value based on power charges, comfort, and amount of power consumption. Summary of the Invention [Problem to be solved by the invention]

[0003] However, when adjusting the operation of multiple air conditioning devices installed in multiple target spaces, it is necessary to evaluate all combinations of time periods, target spaces, and set temperatures that can be set for the air conditioning devices installed in each target space, which results in a huge amount of calculation. [Means for solving the problem]

[0004] An air conditioning control device according to a first aspect is a device that controls air conditioning indoor units installed in a plurality of target spaces, each of which includes a first space and a second space. The air conditioning control device includes a control unit that determines the control content of the air conditioning indoor units. The control unit acquires first information related to the priority of each target space and the set temperature range of the air conditioning indoor units. Furthermore, when the priority of the second space is higher than the priority of the first space, the control unit determines a first temperature range based on the first information so that a first temperature range indicating a range of candidate set temperatures for a first air conditioning indoor unit installed in the first space is limited to a second temperature range indicating a range of candidate set temperatures for a second air conditioning indoor unit installed in the second space. Furthermore, the control unit evaluates the operation of the first air conditioning indoor unit for each possible set temperature within the first temperature range.

[0005] In the air conditioning control device of the first aspect, the first temperature range indicating the range of candidates for the set temperature of the first air conditioning indoor unit is limited, thereby making it possible to reduce the amount of calculations.

[0006] An air conditioning control device according to a second aspect is the air conditioning control device according to the first aspect, in which the control unit performs an evaluation based on the air conditioning operating cost and second information related to comfort.

[0007] An air conditioning control device according to a third aspect is the air conditioning control device according to the first or second aspect, in which the control unit performs evaluation for a first time limit, which is a time limit within a predetermined period, and a second time limit that follows the first time limit.

[0008] An air conditioning control device of a fourth aspect is the air conditioning control device of the third aspect, wherein the control unit generates a control plan for the first air conditioning indoor unit based on the evaluation, the control plan including a first set temperature for the first air conditioning indoor unit at a first time period and a first set temperature for the first air conditioning indoor unit at a second time period.

[0009] In the air conditioning control device of the fourth aspect, a control plan for the first air conditioning indoor unit can be generated taking into consideration air conditioning operating costs and comfort.

[0010] An air conditioning control device according to a fifth aspect is the air conditioning control device according to any one of the first to fourth aspects, further comprising a display unit, wherein the control unit causes the display unit to display the first temperature range.

[0011] In the air conditioning control device of the fifth aspect, the administrator can check the first temperature range.

[0012] An air conditioning control method according to a sixth aspect is a method for controlling air conditioning indoor units installed in a plurality of target spaces, each of which includes a first space and a second space. The air conditioning control method includes a first step, a second step, and a third step. In the first step, first information relating to the priority of each target space and the set temperature range of the air conditioning indoor unit is acquired. In the second step, if the priority of the second space is higher than the priority of the first space, a first temperature range is determined based on the first information so that a first temperature range indicating a range of candidate set temperatures for a first air conditioning indoor unit installed in the first space is limited to a second temperature range indicating a range of candidate set temperatures for a second air conditioning indoor unit installed in the second space. In the third step, an evaluation of the operation of the first air conditioning indoor unit is performed for each possible set temperature within the first temperature range.

[0013] In the air conditioning control device of the sixth aspect, the first temperature range indicating the range of candidates for the set temperature of the first air conditioning indoor unit is limited, thereby making it possible to reduce the amount of calculations.

[0014] An air conditioning control method according to a seventh aspect is the air conditioning control method according to the sixth aspect, wherein in the third step, an evaluation is performed based on the air conditioning operating cost and the second information related to comfort.

[0015] An air conditioning control method according to an eighth aspect is an air conditioning control method according to the sixth or seventh aspect, in which in the third step, an evaluation is performed for a first time limit, which is a time limit within a predetermined period, and a second time limit, which is consecutive to the first time limit.

[0016] An air conditioning control method according to a ninth aspect is the air conditioning control method according to the eighth aspect, further comprising a fourth step. In the fourth step, a control plan for the first indoor air conditioner is generated based on the evaluation, the control plan including a first temperature setting for the first air conditioning indoor unit at the first time period and a first temperature setting for the first air conditioning indoor unit at the second time period.

[0017] In the air conditioning control method of the ninth aspect, a control plan for the first air conditioning indoor unit can be generated taking into consideration air conditioning operating costs and comfort.

[0018] An air conditioning control method according to a tenth aspect is the air conditioning control method according to any one of the sixth to ninth aspects, further comprising a fifth step, in which the first temperature range is displayed on a display unit.

[0019] In the air conditioning control method according to the tenth aspect, the administrator can check the first temperature range. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 2 is a schematic diagram of an air conditioning control device. [Figure 2] FIG. 2 is a functional block diagram of the air conditioning control device. [Figure 3] 10 is a flowchart illustrating an example of processing by a calculation unit. [Figure 4] FIG. 10 is a diagram for explaining a calculation process of a first temperature range. [Figure 5] FIG. 10 is a diagram for explaining a calculation process of a first temperature range. [Figure 6] 10 is a flowchart illustrating an example of a process for calculating an evaluation value. [Figure 7] FIG. 10 is a diagram for explaining a calculation process of an evaluation value. [Figure 8] FIG. 10 is a diagram for explaining a process for determining a set temperature. DETAILED DESCRIPTION OF THE INVENTION

[0021] (1) Overall structure An air conditioning control device 100 and an air conditioning control method according to the first embodiment will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of the air conditioning control device 100. The air conditioning control device 100 is a device that controls indoor units (air conditioning indoor units) 30 installed in multiple target spaces SP. The air conditioning control device 100 mainly comprises an air conditioner 10, a controller 50, and a management terminal 60. The controller 50 and the management terminal 60 are communicatively connected via a network NW. The network NW includes a LAN, a WAN, the Internet, a mobile communication network, and the like. The controller 50 is connected to the air conditioner 10. Note that while FIG. 1 shows one outdoor unit 20 connected to the controller 50, multiple outdoor units 20 may be connected to the controller 50. One or more indoor units 30 are installed in each target space SP. The multiple target spaces SP may be located in the same building or may be separated into multiple buildings.

[0022] The air conditioning control device 100 is configured to be capable of demand control. Demand control is a control that predicts the amount of power consumed by the indoor units 30 for each predetermined time period during which power reduction is required, and keeps the total power consumption for each time period within the range of the contracted power amount or target usage amount. In this embodiment, the predetermined time period is, for example, a 30-minute period. The air conditioning control device 100 adjusts the amount of power consumption by performing demand control.

[0023] (2) Detailed configuration (2-1) Air conditioning equipment The air conditioner 10 has a refrigerant circuit made up of a compressor, heat exchanger, etc. (not shown). One refrigerant circuit is made up of an outdoor unit 20 and one or more indoor units 30 connected to the outdoor unit 20 via refrigerant piping. In this embodiment, the multiple indoor units 30 making up one refrigerant circuit are installed separately in different target spaces SP. Indoor units 30 of air conditioners 10 having different refrigerant circuits may be installed in one target space SP. The outdoor unit 20 and the indoor units 30 are communicatively connected by a communication line 90. Furthermore, the outdoor unit 20 and the controller 50 are communicatively connected by a communication line 91.

[0024] As shown in Fig. 2, the outdoor unit 20 and the indoor unit 30 are provided with an outdoor control unit 22 and an indoor control unit 33, respectively. In addition, various sensors are attached to the air conditioner 10 at predetermined locations as appropriate. These sensors detect the room temperature, the surrounding outside air temperature, the discharge temperature and discharge pressure of the refrigerant, etc. Then, based on the detected values ​​and instruction signals of the various sensors, the outdoor control unit 22 and the indoor control unit 33 work together to control the operation of each part of the air conditioner 10.

[0025] The air conditioner 10 operates based on various signals input from an operation terminal 40 such as a remote control and / or an operation panel, and various information input from a controller 50.

[0026] (2-1-1) Outdoor unit The outdoor unit 20 is a device that functions as a heat source for the refrigerant circuit. As shown in FIG. 2, the outdoor unit 20 mainly includes an outdoor storage unit 21 and an outdoor control unit 22.

[0027] The outdoor storage unit 21 stores control data and the like.

[0028] The outdoor control unit 22 transmits and receives various information and instruction signals to and from the indoor unit 30, the operation terminal 40, and the controller 50. The various information includes a first temperature range and a first set temperature. The first temperature range is a range of candidate set temperatures for the indoor unit 30, and is a temperature range for which a calculation unit 54 (described later) calculates an evaluation value. The first set temperature is a temperature calculated as the set temperature for the indoor unit 30 by the calculation unit 54 (described later). The instruction signal is a signal related to an instruction for the air conditioning apparatus 10 received from a user via the operation terminal 40. When the outdoor control unit 22 receives an instruction signal from the operation terminal 40, it associates the received instruction signal with the indoor unit 30 and transmits it to the controller 50. The outdoor control unit 22 may associate the received instruction signal with the indoor unit 30 and store it in the outdoor memory unit 21 as an operation history. Furthermore, when the outdoor control unit 22 receives the first set temperature from the controller 50, it transmits the received information to the indoor unit 30 associated with the information. The outdoor control unit 22 controls the operation of each unit of the air conditioner 10 so that the indoor temperature converges to the first set temperature.

[0029] (2-1-2) Indoor unit The indoor unit 30 is operated by an operation terminal 40 installed in the target space SP. As shown in Fig. 2, the indoor unit 30 mainly has a communication unit 31, an indoor storage unit 32, and an indoor control unit 33. Note that, for ease of explanation, Fig. 2 shows one indoor unit 30.

[0030] The communication unit 31 is a network interface device for performing wireless communication, and receives an instruction signal transmitted from the operation terminal 40.

[0031] The indoor storage unit 32 stores control data and the like.

[0032] The indoor control unit 33 transmits and receives various information and instruction signals to and from the outdoor unit 20 and the operation terminal 40. When the indoor control unit 33 receives an instruction signal from the operation terminal 40, it transmits the received instruction signal to the outdoor unit 20. The indoor control unit 33 may store the received instruction signal as an operation history in the indoor storage unit 32. Furthermore, when the indoor control unit 33 receives a first set temperature from the outdoor unit 20, it transmits the received information to the operation terminal 40.

[0033] (2-2) Operation terminal The operation terminal 40 receives instructions from the user regarding the corresponding air conditioning apparatus 10. The operation terminal 40 is composed of a remote control, an operation panel installed in the room, etc. The operation terminal 40 may be a small laptop computer, a smartphone, or a tablet terminal that is carried or held by the user. As shown in FIG. 2, the operation terminal 40 has a communication unit 41, a display unit 42, and an operation unit 43.

[0034] The communication unit 41 is a network interface device for performing wireless communication. The communication unit 41 transmits instruction signals relating to instructions for the air conditioning apparatus 10 received from the user to the indoor unit 30. The instruction signals include, for example, signals instructing the start and stop of operation, and signals relating to various settings. The signals relating to various settings include, for example, signals relating to the set temperature and air volume. The communication unit 41 also transmits and receives various information to and from the indoor unit 30.

[0035] The display unit 42 is a display. The display unit 42 displays various images, characters, etc. The display unit 42 may be a touch screen that also has the function of the operation unit 43.

[0036] The operation unit 43 includes buttons, dials, keys, etc. for the user to operate. By operating the operation unit 43, the user inputs information such as the operation details and set temperature of the indoor unit 30.

[0037] The operation terminal 40 causes the display unit 42 to display the operation details, set temperature, and first set temperature of the air conditioner 10.

[0038] (2-3) Management terminal The management terminal 60 is a computer operated by an administrator of each target space SP. The management terminal 60 is, for example, a mobile terminal such as a personal computer, a smartphone, or a tablet terminal. The management terminal 60 is communicably connected to the controller 50 via a network NW. As shown in FIG. 2, the management terminal 60 has a control unit 61, a memory unit 62, an input unit 63, and a display unit 64.

[0039] The storage unit 62 is a storage medium such as a RAM, a ROM, a flash memory, etc. The storage unit 62 stores programs executed by the control unit 61, data necessary for executing the programs, and the like.

[0040] The input unit 63 is an input device such as a keyboard and a mouse. The display unit 64 is a display. The display unit 64 displays various images, characters, etc. under the control of the control unit 61. The display unit 64 may be a touch screen that also has the function of the input unit 63.

[0041] The control unit 61 is a processor such as a CPU or GPU. The control unit 61 reads and executes programs stored in the storage unit 62 to realize various functions of the management terminal 60. The control unit 61 can also write calculation results to the storage unit 62 and read information stored in the storage unit 62 according to the programs.

[0042] The control unit 61 causes the display unit 64 to display a management screen for the air conditioning apparatus 10, including an input screen for inputting the priority of each target space SP and an input screen for inputting the range of set temperatures that ensures comfort (hereinafter referred to as first information). The control unit 61 may perform control so that the same priority can be input for multiple target spaces SP. The input priority is stored in the memory unit 51 of the controller 50 in association with the indoor unit 30. The input priority may also be stored in the memory unit 51 of the controller 50 in association with the target space SP. The input first information is stored in the memory unit 51 of the controller 50.

[0043] The control unit 61 displays the first temperature range for the current time limit and the set temperature and / or first set temperature on the display unit 64 for each indoor unit 30. The set temperature indicates the set temperature currently set for that indoor unit 30. The control unit 61 may also display the first temperature range and first set temperature for the next time limit and beyond on the display unit 64 for each indoor unit 30. The first temperature range, set temperature, and first set temperature may each be updatable by an administrator. The control unit 61 may also display the first temperature range, set temperature, and / or first set temperature for each target space SP on the display unit 64. In this case, the first temperature range indicates the temperature range that can be set for the indoor unit 30 installed in that target space SP. The set temperature indicates the set temperature currently set for the indoor unit 30 installed in that target space SP. The first set temperature indicates the temperature calculated as the set temperature for the indoor unit 30 installed in that target space SP.

[0044] (2-4) Controller The controller 50 manages the air conditioning apparatus 10 by being connected to the outdoor control unit 22 of the outdoor unit 20. The controller 50 is, for example, what is called an edge. The controller 50 may be configured by connecting multiple computers and devices via a network. As shown in FIG. 2, the controller 50 has a storage unit 51, a control unit 53, and a communication unit 52.

[0045] (2-4-1) Storage section The storage unit 51 is a storage device such as a RAM, a ROM, and an HDD. The storage unit 51 stores programs executed by the control unit 53, data necessary for executing the programs, and the like. The storage unit 51 stores first information in advance. The storage unit 51 may store the first information for each target space SP and / or operation mode of the air conditioning device 10. For example, the first information when the operation mode is cooling operation may be a temperature range of 24°C to 28°C, and the first information when the operation mode is heating operation may be a temperature range of 20°C to 26°C. The storage unit 51 also stores a priority order for each target space SP.

[0046] (2-4-2) Communications Department The communication unit 52 includes a network interface device for communicating with the management terminal 60 via the network NW, and a network interface device for communicating with the outdoor unit 20 via a communication line 91. The communication unit 52 sends and receives various information to and from the management terminal 60 via the network NW. The communication unit 52 also sends and receives various information and instruction signals to and from the outdoor control unit 22 via the communication line 91. The communication unit 52 also receives a power reduction signal via the network NW. The power reduction signal is a signal that requests reduction in power consumption by the air conditioning apparatus 10.

[0047] (2-4-3) Control Unit The control unit 53 is a processor such as a CPU or a GPU. The control unit 53 reads and executes programs stored in the storage unit 51 to realize various functions of the controller 50. The control unit 53 can also write calculation results to the storage unit 51 and read information stored in the storage unit 51 according to the programs.

[0048] 2, the control unit 53 has, as a functional block, a calculation unit 54. Note that the function of the calculation unit 54 may be configured as part of the function of any of the management terminal 60, the operation terminal 40, the indoor control unit 33, and the outdoor control unit 22, for example.

[0049] Upon receiving the power reduction signal, the control unit 53 calculates a first temperature range and a first set temperature for each time limit for each target space SP for the period during which power reduction is requested, and generates a control plan for the indoor units 30. The first set temperature is a temperature calculated as described below as the set temperature for the indoor units 30 at a specified time limit. Each time the time limit changes, the control unit 53 calculates a first temperature range and a first set temperature for each time limit for each target space SP for the next time limit and thereafter, and adjusts the control plan for the indoor units 30.

[0050] The control unit 53 stores the calculated first temperature range and first set temperature in the memory unit 51 in association with the indoor unit 30 and the time limit. The control unit 53 may also store the calculated first temperature range in association with the target space SP and the time limit in the memory unit 51. When it determines that the current time is the start time of one time limit, the control unit 53 transmits the first set temperature for that time limit to the outdoor unit 20 in association with the indoor unit 30. The control unit 53 may also store the received instruction signal in the memory unit 51 as an operation history in association with the indoor unit 30.

[0051] (3) Processing of the calculation section FIG. 3 is a flowchart illustrating an example of an air conditioning control method performed by the calculation unit 54.

[0052] In step S10, the calculation unit 54 acquires the priority and first information of each target space SP stored in advance in the storage unit 51. The calculation unit 54 performs the processes of steps S11 to S14 in order from the target space SP with the highest priority.

[0053] In step S11, the calculation unit 54 calculates a first temperature range for the target space SP to be processed. If the target space SP has the highest priority, the calculation unit 54 determines that the first temperature range for each time period of the target space SP is the same range as the first information. On the other hand, if there is a target space (second space) SP with a higher priority than the target space (first space) SP, the calculation unit 54 calculates the first temperature range for each time period of the first space so that it does not include temperatures that are less energy-efficient than the first set temperature of the second space. In other words, the calculation unit 54 calculates the first temperature range for each time period of the first space so that the first temperature range indicating the range of candidate set temperatures for the indoor unit (first air conditioning indoor unit) 30 installed in the first space is limited to the temperature range (second temperature range) indicating the range of candidate set temperatures for the indoor unit (second air conditioning indoor unit) 30 installed in the second space. Since the calculation unit 54 performs the processes of steps S11 to S14 in order from the target space SP with the highest priority, the first set temperature of the second space with a higher priority than the first space is calculated first. Details of the calculation process of the first temperature range will be described later.

[0054] In step S12, the calculation unit 54 calculates an evaluation value related to the operation of the indoor unit 30 for each time period and for each set temperature that can be set in the indoor unit 30 (hereinafter referred to as settable temperature). A settable temperature is a temperature within a first temperature range, for example, a temperature that can be set in the indoor unit 30 in increments of 0.5°C. The calculation unit 54 calculates the evaluation value based on the electricity rate, which is the air conditioning operation cost, and the second information related to comfort. The evaluation value is a value that evaluates the energy cost related to the air conditioning operation of the indoor unit 30, taking comfort into consideration. The evaluation value calculation process consists of steps S121 to S127 in FIG. 6. The evaluation value calculation process will be described in detail later.

[0055] In step S13, the calculation unit 54 determines, for each time period, the first set temperature of the indoor unit 30. The calculation unit 54 determines the first set temperature of the indoor unit 30 for each time period based on the evaluation value calculated in step S12 so as to optimize comfort and energy costs. Details of the process for determining the first set temperature will be described later.

[0056] In step S14, the calculation unit 54 determines whether or not the processing of all the target spaces SP has been completed. If it is determined that the processing of all the target spaces SP has been completed (Yes in step S14), the calculation unit 54 ends the processing.

[0057] If it is determined that processing has not been completed for all target spaces SP (No in step S14), the process returns to step S11 and proceeds to processing the next target space SP. The calculation unit 54 repeats the processing of steps S11 to S14 above, starting with the indoor unit 30 in the target space SP with the highest priority, until processing of the indoor units 30 in all target spaces SP is completed.

[0058] (3-1) Calculation process for the first temperature range The calculation process of the first temperature range in step S11 will be described in detail. The calculation unit 54 calculates, for each time period, a first temperature range that indicates a range of candidate set temperatures for the indoor units 30 installed in the target space SP that is the processing target. The calculation unit 54 performs calculation process of the first temperature range for multiple time periods in order from the earliest start time. However, the order of the time periods in which calculation process of the first temperature range is performed is not limited to this.

[0059] A case where the operation mode of the air conditioner 10 is cooling operation will be described. Fig. 4 is a diagram for explaining the calculation process of the first temperature range for a predetermined time period. Assume that the target spaces SP include target space A with the highest priority, target space B with the second highest priority, and target space C with the third highest priority. Assume that the first information when the operation mode is cooling operation for all target spaces SP is 24°C to 28°C.

[0060] First, the case of the target space A with the highest priority will be described. As described above, the first temperature range that can be set in the indoor unit 30 of the target space SP with the highest priority is the same range as the first information. In other words, the calculation unit 54 sets the first temperature range of the target space A with the highest priority to 24°C to 28°C, the same as the first information.

[0061] Next, the calculation of the first temperature range for target space B, which has the second highest priority, will be described. The calculation unit 54 determines whether there is a target space SP with a higher priority than target space B. If it is determined that there is a target space SP with a higher priority, the calculation unit 54 acquires the first set temperature for the relevant time period of the target space SP with a higher priority than target space B and a priority closest to that of target space B. As described above, the first set temperature for the target space SP with a higher priority than the target space SP being processed has been calculated earlier. Specifically, it is assumed that the first set temperature for the relevant time period of the indoor unit 30 in target space A is calculated to be 26°C.

[0062] The calculation unit 54 determines the first temperature range for that time limit for the target space B based on the first information so as to include a temperature that is equivalent to 26°C, which is the first set temperature for that time limit of the indoor unit 30 in the target space A, or a temperature at which the power consumption of the air conditioner 10 is lower than when the set temperature is 26°C. In other words, the first temperature range for that time limit for the target space B is limited so as not to include a temperature that is less energy-efficient than the first set temperature for that time limit for the target space A, which has a higher priority. Specifically, the calculation unit 54 determines the first temperature range for that time limit for the target space B to be 26°C to 28°C.

[0063] Similarly, the calculation unit 54 determines the first temperature range for the target spaces SP with third and subsequent priorities. Specifically, if the first set temperature for the relevant time limit in the target space B is 27°C, the calculation unit 54 determines the first temperature range for the relevant time limit in the target space C to be 27°C to 28°C based on the first information.

[0064] Next, a case where the operation mode of the air conditioner 10 is heating operation will be described. Fig. 5 is a diagram for explaining calculation of the first temperature range for a predetermined time period. Assume that the target spaces SP include target space A with the highest priority, target space B with the second highest priority, and target space C with the third highest priority. Assume that the first information when the operation mode is heating operation for all target spaces SP is 20°C to 26°C.

[0065] First, the case of the target space A with the highest priority will be described. As described above, the first temperature range that can be set in the indoor unit 30 of the target space SP with the highest priority is the same range as the first information. In other words, the calculation unit 54 sets the first temperature range of the target space A with the highest priority to 20°C to 26°C, the same as the first information.

[0066] Next, the calculation of the first temperature range for target space B, which has the second highest priority, will be described. The calculation unit 54 determines whether there is a target space SP with a higher priority than target space B. If it is determined that there is a target space SP with a higher priority, the calculation unit 54 acquires the first set temperature for the relevant time period of the target space SP with a higher priority than target space B and a priority closest to that of target space B. As described above, the first set temperature for the target space SP with a higher priority than the target space SP being processed has been calculated earlier. Specifically, it is assumed that the first set temperature for the relevant time period of the indoor unit 30 in target space A is calculated to be 24°C.

[0067] The calculation unit 54 determines the first temperature range for the time limit of the target space B based on the first information so as to include a temperature that is equivalent to 24°C, which is the first set temperature for the time limit of the indoor unit 30 in the target space A, or a temperature at which the power consumption of the air conditioner 10 is lower than when the set temperature is 24°C. In other words, the first temperature range for the time limit of the target space B is limited so as not to include a temperature that is less energy-efficient than the first set temperature for the time limit of the target space A, which has a higher priority. Specifically, the calculation unit 54 determines the first temperature range for the time limit of the target space B to be 20°C to 24°C.

[0068] Similarly, the calculation unit 54 determines the first temperature range for the target spaces SP with third and subsequent priorities. Specifically, if the first set temperature for the target space B for the relevant time period is 22°C, the calculation unit 54 determines the first temperature range for the target space C for the relevant time period to be 20°C to 22°C.

[0069] As described above, the calculation unit 54 calculates the first temperature range so that the higher the priority of the target space SP, the wider the first temperature range. As a result, it is possible to prioritize the comfort of the target space SP with a higher priority. Note that, since the first temperature range is more limited for target spaces SP with a lower priority, it is preferable to set the upper limit of the priority to 3 or 4.

[0070] (3-2) Calculation of evaluation value The evaluation value calculation process in step S12 will be described in detail. The calculation unit 54 performs the evaluation value calculation process for each time limit within the period for which power suppression is required. In the evaluation value calculation process, the calculation unit 54 calculates an evaluation value related to the operation of the indoor unit 30 installed in the target space SP for all combinations of the settable temperature for the time limit before the time limit and the settable temperature for the time limit. As described above, the settable temperature is a temperature within the first temperature range. Therefore, the narrower the first temperature range, the less calculation is required to calculate the evaluation value.

[0071] The calculation unit 54 calculates an evaluation value related to the operation of the indoor unit 30 based on the electricity fee, which is the air conditioning operation cost, and the second information related to comfort. In this embodiment, the evaluation value is defined by the following equation 1.

number

[0072] The evaluation value for the operation of the indoor unit 30 at time limit n and set temperature T°C is calculated by assigning weights α and β to the air conditioning operation cost at time limit n and set temperature T°C and the second information at set temperature T°C, respectively.

[0073] Specifically, the calculation unit 54 predicts the air conditioning load of the indoor unit 30 for time period n when the set temperature is T°C. Methods for predicting the air conditioning load include a method using past power consumption status and a method using weather forecasts. The electricity fee, which is the air conditioning operation cost, is calculated based on the predicted power consumption and the electricity unit price for time period n.

[0074] The second information is a value based on the PMV when the room temperature is T°C. PMV is a known thermal index. PMV is an index that expresses human thermal comfort on a scale ranging from -3 to 3, with a state of PMV=0 being thermally neutral. ISO (International Organization for Standardization) standards recommend a PMV range of -0.5 to 0.5 as the comfort zone. In this embodiment, the second information takes a smaller value as the PMV approaches 0. Note that the second information may be information related to the set temperature desired by the user. In this case, the second information may take a smaller value as the difference between the set temperature desired by the user and the set temperature T°C becomes smaller.

[0075] Therefore, the higher the electricity rate, the larger the evaluation value, and the lower the comfort level. On the other hand, the lower the electricity rate, the smaller the evaluation value, and the higher the comfort level. In other words, the set temperature that results in the smallest evaluation value can be said to be the optimal set temperature.

[0076] FIG. 6 is a flowchart illustrating an example of the calculation process of an evaluation value. FIG. 7 is a diagram illustrating the calculation process of an evaluation value. The calculation unit 54 performs the calculation process of an evaluation value for a first time period (time period 1 in FIG. 7 ), which is a time period within a period for which power suppression is required, and a second time period (time period 2 in FIG. 7 ) that is consecutive to the first time period. The calculation unit 54 may further perform the calculation process of an evaluation value for a third time period (time period 3 in FIG. 7 ) that is consecutive to the second time period, a fourth time period that is consecutive to the third time period, and any time period thereafter. For convenience, three time periods will be described below, but the number of time periods is not limited to this and may be one or more. The evaluation value illustrated in FIG. 7 is an example for illustrative purposes. Time periods 1, 2, and 3 illustrated in FIG. 7 are consecutive periods. In this embodiment, the calculation unit 54 calculates the evaluation values ​​in order from the earliest time period to the latest time period, but the present invention is not limited to this.

[0077] The calculation unit 54 determines the start temperature and end temperature for the evaluation value calculation process (steps S121 and S122). The start temperature refers to the room temperature predicted at the start time of the relevant time period. The end temperature refers to the room temperature predicted at the end time of the relevant time period. In other words, the start temperature refers to the end temperature of the immediately preceding time period (the set temperature of the immediately preceding time period or each settable temperature of the immediately preceding time period), or, if the air conditioner is off during the immediately preceding time period, the predicted temperature at the end of the immediately preceding time period. The end temperature refers to each settable temperature of the relevant time period, or, if the air conditioner is off during the time period, the predicted temperature at the end of the relevant time period. In this embodiment, the start temperature and end temperature are calculated in order from lowest to highest for the evaluation values, but this is not limited to this.

[0078] In step S123, the calculation unit 54 calculates an evaluation value relating to the operation of the indoor unit 30 using the above-mentioned equation 1 based on the determined start temperature and end temperature.

[0079] In step S124, the calculation unit 54 determines whether the end temperature is the maximum value of the settable temperatures for that time period, or the maximum value of the predicted temperature at the end of that time period if the air conditioner is off during that time period (hereinafter referred to as the maximum end temperature). If the end temperature is not the maximum end temperature (NO in step S124), the process returns to step S122, and the next end temperature is determined. The calculation unit 54 repeats the processes of steps S122 to S124 until the end temperature becomes the maximum end temperature.

[0080] If the end temperature is the maximum end temperature (YES in step S124), in step S125, the calculation unit 54 determines whether the start temperature is the maximum value of the end temperatures of the immediately preceding time limit (the set temperature of the immediately preceding time limit or each settable temperature of the immediately preceding time limit), or the maximum value of the predicted temperature at the end of the immediately preceding time limit if the air conditioner was off during the immediately preceding time limit (hereinafter referred to as the maximum start temperature). If the start temperature is not the maximum start temperature (NO in step S125), the process returns to step S121, and the next start temperature is determined. The calculation unit 54 repeats the processes of steps S121 to S125 until the start temperature becomes the maximum start temperature.

[0081] If the start temperature is the maximum start temperature (YES in step S125), in step S126, the calculation unit 54 determines the optimum evaluation value (optimum evaluation value) for each end temperature.

[0082] A method for determining the optimal evaluation value for time limit 1 will now be described. In step S123, evaluation values ​​are calculated for all combinations of the start temperature and end temperature for time limit 1. As described above, the end temperature that results in the smallest evaluation value is the optimal set temperature. Therefore, the calculation unit 54 selects the smallest evaluation value for each end temperature as the optimal evaluation value for time limit 1.

[0083] As shown in FIG. 7, when the end temperature of time period 1 is 25°C, the evaluation value when the start temperature is 24°C is 4.4, the evaluation value when the start temperature is 25°C is 4.2, and the evaluation value when the start temperature is 26°C is 4.8. In other words, when the end temperature of time period 1 is 25°C, the evaluation value when the start temperature is 25°C is the smallest. In this case, the calculation unit 54 determines the optimal evaluation value when the end temperature of time period 1 is 25°C to be 4.2. Similarly, the calculation unit 54 determines the optimal evaluation value when the end temperature of time period 1 is 24°C to be 4.9, and the optimal evaluation value when the end temperature of time period 1 is 26°C to be 3.5.

[0084] Next, a method for determining the optimal evaluation value for time period 2 will be described. In step S123, evaluation values ​​are calculated for all combinations of the start temperature and end temperature of time period 2. The start temperature of time period 2 is equal to the end temperature of time period 1. Therefore, the calculation unit 54 calculates the total evaluation value for time period 2 by adding the optimal evaluation value for the end temperature of time period 1, which is equal to the start temperature of time period 2, to the evaluation value for time period 2. Specifically, the calculation unit 54 calculates the total evaluation value for time period 2 by adding 4.2, which is the optimal evaluation value when the end temperature of time period 1 is 25°C, to the evaluation value when the start temperature of time period 2 is 25°C. Similarly, when the start temperature of time period 2 is 24°C, the calculation unit 54 calculates the total evaluation value for time period 2 by adding 4.9, which is the optimal evaluation value when the end temperature of time period 1 is 24°C, to the evaluation value when the start temperature of time period 2 is 24°C. Furthermore, when the start temperature of time period 2 is 26°C, the calculation unit 54 calculates the total evaluation value for time period 2 by adding the evaluation value when the start temperature of time period 2 is 26°C, to the optimal evaluation value of 3.5 when the end temperature of time period 1 is 26°C. The calculation unit 54 selects the smallest total evaluation value for each end temperature as the optimal evaluation value for time period 2.

[0085] 7, when the end temperature of time period 2 is 25°C, the total evaluation value is smallest when the start temperature is 26°C. In this case, the calculation unit 54 determines the optimal evaluation value when the end temperature of time period 2 is 25°C to be 7.6 (4.1 + 3.5). Similarly, the calculation unit 54 determines the optimal evaluation value when the end temperature of time period 2 is 24°C to be 8.9, and the optimal evaluation value when the end temperature of time period 2 is 26°C to be 6.3.

[0086] Next, a method for determining the optimal evaluation value for time period 3 will be described. The calculation of the total evaluation value for time period 3 is the same as the calculation of the total evaluation value for time period 2. In step S123, evaluation values ​​are calculated for all combinations of the start temperature and end temperature for time period 3. The start temperature of time period 3 is equal to the end temperature of time period 2. Therefore, the calculation unit 54 calculates the total evaluation value for time period 3 by adding the optimal evaluation value for the end temperature of time period 2, which is equal to the start temperature of time period 3, to the evaluation value of time period 3. The calculation unit 54 selects the smallest total evaluation value for each end temperature as the optimal evaluation value for time period 3.

[0087] In step S127, the calculation unit 54 determines whether or not there is a next time limit. If it is determined that there is no next time limit (NO in step S127), the calculation unit 54 ends the process.

[0088] If it is determined that there is a next time limit (YES in step S127), the process returns to step S121 and starts processing the next time limit. The calculation unit 54 repeats the processes of steps S121 to S127 until the final time limit is reached.

[0089] (3-3) First set temperature determination process The process of determining the first set temperature in step S13 will now be described in detail. The calculation unit 54 determines, for each time period, the first set temperature that is the optimum temperature to be set as the temperature for the indoor unit 30 installed in the target space SP. The calculation unit 54 calculates the first set temperature for the indoor unit 30 for each time period based on the total evaluation value for the last time period. As described above, the ending temperature when the total evaluation value is smallest is the optimum set temperature. Figure 8 is a diagram for explaining the process of determining the first set temperature.

[0090] The calculation unit 54 selects the smallest value (minimum total evaluation value) from the total evaluation values ​​for the final time period. The calculation unit 54 calculates the end temperature for the final time period linked to the minimum total evaluation value. The calculation unit 54 determines this end temperature as the first set temperature of the indoor unit 30 for the final time period. For example, assume that time period 3 shown in FIG. 8 is the final time period. In this case, the minimum total evaluation value is 9.4. The end temperature of time period 3 when the total evaluation value for time period 3 is 9.4 is 26°C. Therefore, the calculation unit 54 determines the first set temperature of the indoor unit 30 for time period 3 to be 26°C.

[0091] Furthermore, when the evaluation value of time period 3 is 9.4, the start temperature of time period 3 is 26°C. The start temperature of time period 3 is equal to the end temperature of the immediately preceding time period, time period 2. Therefore, the calculation unit 54 determines the first set temperature of the indoor unit 30 for time period 2 to be 26°C.

[0092] Furthermore, when the evaluation value of time period 3 is 9.4, the start temperature of time period 2 is 25°C. The start temperature of time period 2 is equal to the end temperature of the immediately preceding time period, time period 1. Therefore, the calculation unit 54 determines the first set temperature of the indoor unit 30 for time period 1 to be 25°C.

[0093] In this way, the calculation unit 54 determines the first set temperature of the indoor unit 30 for each time period, going back from the last time period.

[0094] (5) Features (5-1) When adjusting the operation of multiple air conditioning devices installed in multiple target spaces, it is necessary to evaluate all combinations of time periods, target spaces, and set temperatures that can be set for the air conditioning devices installed in each target space, which results in a huge amount of calculation.

[0095] The air conditioning control device 100 of this embodiment is a device that controls indoor units 30 installed in multiple target spaces SP, including a first space and a second space. The air conditioning control device 100 is equipped with a control unit 53 that determines the control content of the indoor units 30. The control unit 53 acquires the priority of each target space SP and first information related to the set temperature range of the indoor units 30. Furthermore, when the priority of the second space (target space SP) is higher than the priority of the first space (target space SP), the control unit 53 determines the first temperature range based on the first information so that the first temperature range indicating the range of candidate set temperatures for the indoor units 30 installed in the first space is limited to the second temperature range indicating the range of candidate set temperatures for the indoor units 30 installed in the second space. Furthermore, the control unit 53 evaluates the operation of the indoor units 30 when the set temperature of the indoor units 30 installed in the first space is set to each settable temperature within the first temperature range.

[0096] In the air conditioning control device 100 of this embodiment, the amount of calculation can be reduced by limiting the first temperature range that can be set in the indoor unit 30 installed in the first space. Furthermore, because the first temperature range is calculated according to the priority of the target space SP desired by the manager, the time and cost required for air conditioning management of the target space SP can be reduced, improving the convenience of air conditioning management of the target space SP.

[0097] (5-2) In the air conditioning control device 100 of this embodiment, the control unit 53 performs evaluation based on the air conditioning operating cost and the second information related to comfort.

[0098] (5-3) In the air conditioning control device 100 of this embodiment, the control unit 53 performs evaluation for a first time limit and a second time limit that follows the first time limit, which are time limits within a predetermined period.

[0099] (5-4) In the air conditioning control device 100 of this embodiment, the control unit 53 generates a control plan for the indoor unit 30 based on the evaluation, the control plan including the first set temperature of the indoor unit 30 at the first time period and the first set temperature of the indoor unit 30 at the second time period.

[0100] The air conditioning control device 100 of this embodiment can generate a control plan for the indoor units 30, taking into consideration air conditioning operating costs and comfort.

[0101] (5-5) The air conditioning control device 100 of this embodiment further includes a display unit 64. The control unit 53 causes the display unit 64 to display the first temperature range.

[0102] The air conditioning control device 100 of this embodiment allows the administrator to check the first temperature range. As a result, it is possible to prevent the administrator from mistaking that there is something wrong with the air conditioner 10 and from feeling dissatisfied with the air conditioning capacity.

[0103] (6) Variations (6-1) Variation 1A The order of each process and the content of each process in the flowchart described above can be changed as appropriate without departing from the gist of the present disclosure.

[0104] (6-2) Variation 1B In this embodiment, the control unit 53 of the controller 50 has the function of the calculation unit 54. However, the functions of the control unit 53 and the calculation unit 54 may be realized by a control device installed on the cloud. The control device may be configured to be connectable to the controller 50 and the outdoor unit 20 via the network NW. The control device may be a supercomputer, a workstation, or a personal computer.

[0105] This configuration also enables wide-area demand control, which is a control method in which an electric power supplier (electric power company) requests a demand response (DR) from an electric power consumer regarding power consumption or reduction, and the consumer adjusts their power consumption, thereby adjusting the balance of power supply and demand across the entire area.

[0106] (6-3) Variation 1C The calculation unit 54 may calculate an evaluation value related to the operation of the indoor unit 30 based on information related to incentives given to managers and users who participate in demand control. Alternatively, the calculation unit 54 may calculate an evaluation value related to the operation of the indoor unit 30 based on costs related to CO2 emissions, such as J-credits or carbon tax.

[0107] (6-4) Variation 1D In this embodiment, when the outdoor control unit 22 receives an instruction signal from the operation terminal 40, it associates the received instruction signal with the indoor unit 30 and transmits it to the controller 50. However, the outdoor control unit 22 may also transmit the operation history accumulated in the outdoor memory unit 21 to the controller 50 at predetermined intervals.

[0108] (6-5) Variation 1E When the outdoor control unit 22 receives an instruction signal from the operation terminal 40, the outdoor control unit 22 may transmit the received instruction signal to the controller 50 in association with the operation terminal 40 or the target space SP.

[0109] (6-6) Variation 1F The priority of each target space SP may be set for each time period.

[0110] (6-7) Variation 1G The control unit 53 may notify the administrator if the frequency of requests to set the indoor unit 30 to a temperature outside the first temperature range is equal to or greater than a predetermined reference value, based on the operation history of the indoor unit 30 stored in the memory unit 51.

[0111] (6-8) Although the embodiments of the present disclosure have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the present disclosure as defined in the claims. [Explanation of symbols]

[0112] 10 Air conditioning equipment 20 Outdoor unit 30 Indoor unit, air conditioning indoor unit, first air conditioning indoor unit, second air conditioning indoor unit 40 Operation terminal 50 Controllers 53 Control Unit 60 Management terminal 64 Display section 100 Air conditioning control device [Prior art documents] [Patent documents]

[0113] [Patent Document 1] Patent No. 6596758

Claims

1. An air conditioning control device (100) that controls air conditioning indoor units (30) installed in a plurality of target spaces including a first space and a second space, a control unit (53) that determines the control content of the air conditioning indoor unit; Equipped with The control unit acquire first information relating to the priority of each of the target spaces and the range of set temperatures of the air conditioning indoor units; when the priority of the second space is higher than the priority of the first space, determining the first temperature range based on the first information so that a first temperature range indicating a range of candidate set temperatures for a first air conditioning indoor unit (30) installed in the first space is limited to a second temperature range indicating a range of candidate set temperatures for a second air conditioning indoor unit (30) installed in the second space; an evaluation of the operation of the first air conditioning indoor unit for each settable temperature within the first temperature range; Air conditioning control device.

2. The control unit performs the evaluation based on the air conditioning operating cost and second information related to comfort. The air conditioning control device according to claim 1 .

3. The control unit performs the evaluation for a first time limit, which is a time limit within a predetermined period, and a second time limit subsequent to the first time limit. The air conditioning control device according to claim 1 or 2.

4. the control unit generates, based on the evaluation, a control plan for the first air conditioning indoor unit, the control plan including a first set temperature of the first air conditioning indoor unit for the first time limit and the first set temperature of the first air conditioning indoor unit for the second time limit. The air conditioning control device according to claim 3 .

5. A display unit (64), the control unit causes the display unit to display the first temperature range. The air conditioning control device according to claim 1 or 2.

6. An air conditioning control method for controlling air conditioning indoor units (30) installed in a plurality of target spaces including a first space and a second space, a first step of acquiring first information relating to the priority of each of the target spaces and the range of the set temperature of the air conditioning indoor unit; a second step of determining, when the priority of the second space is higher than the priority of the first space, a first temperature range indicating a range of candidate set temperatures for a first air conditioning indoor unit (30) installed in the first space based on the first information so that the first temperature range is limited to a second temperature range indicating a range of candidate set temperatures for a second air conditioning indoor unit (30) installed in the second space; a third step of evaluating the operation of the first air conditioning indoor unit when the set temperature of the first air conditioning indoor unit is set to each settable temperature within the first temperature range; Equipped with Air conditioning control method.

7. In the third step, the evaluation is performed based on the air conditioning operation cost and the second information related to comfort. Further provided with The air conditioning control method according to claim 6.

8. In the third step, the evaluation is performed for a first time limit and a second time limit consecutive to the first time limit, the first time limit being time limits within a predetermined period. The air conditioning control method according to claim 6 or 7.

9. a fourth step of generating a control plan for the first air conditioning indoor unit based on the evaluation, the control plan including a first set temperature of the first air conditioning indoor unit during the first time period and the first set temperature of the first air conditioning indoor unit during the second time period; Further provided with The air conditioning control method according to claim 8.

10. a fifth step of displaying the first temperature range on a display unit (64); Further provided with The air conditioning control method according to claim 6 or 7.

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