Air conditioning control device and method

Abstract

To individually set a cooling set temperature and a heating set temperature in heat load air conditioning control.SOLUTION: A room temperature calculating section 151 acquires surface temperature data of an object existing in each of zones into which an air-conditioning target space is divided from a facility management system 30, and estimates an indoor temperature of each zone for each of zones on the basis of the surface temperature data of the calculation target zone, a current supply air set temperature of an AHU 22, and a current supply air quantity to be supplied to the calculation target zone from VAV units 23-1 to 23-3. A set temperature determination section 152 sets a cooling set temperature as an indoor set temperature in a zone where an indoor temperature estimation value is higher than the cooling set temperature, and sets a heating set temperature as the indoor set temperature in a zone where the indoor temperature estimation value is lower than the heating set temperature.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an air conditioning control technology used in a VAV type central air conditioning system. [Background technology]

[0002] In recent years, buildings with relatively large air-conditioned spaces, such as office buildings, have introduced VAV (Variable Air Volume) central air-conditioning systems as their air-conditioning systems. A VAV central air-conditioning system is a system in which a variable air volume type air-conditioning device (VAV unit) is placed in each zone created by dividing the air-conditioned space into several zones, supplying each zone with air conditioned by the air-conditioning device (AHU: Air Handling Unit), and controlling the volume of the supply air sent to the air-conditioned space by the VAV unit in each zone.

[0003] Conventionally, in such VAV type central air conditioning systems, a load-linked air conditioning control technology has been proposed that utilizes CFD forward analysis and CFD inverse analysis of CFD (Computational Fluid Dynamics), a type of distributed system simulation, as an air conditioning control technology for optimally controlling the thermal environment in a certain zone within the air-conditioned space (see, for example, Patent Documents 1 and 2).

[0004] This type of load-linked air conditioning control technology identifies optimal values ​​for the AHU supply air set temperature and each VAV air volume by repeatedly executing CFD forward analysis processing and CFD inverse analysis processing for each air conditioning control cycle. Specifically, the CFD forward analysis processing derives the temperature distribution in the air conditioned space based on boundary conditions for the air conditioned space, such as the walls, VAV air outlet volume (air volume) and outlet temperature, and the heat generation status from heat sources such as human bodies and PCs (Personal Computers) present in the air conditioned space. In addition, the CFD inverse analysis processing identifies air conditioning control parameters such as the AHU supply air set temperature and each zone's supply air volume, based on the temperature distribution obtained by the CFD forward analysis processing, in which the temperature of the target zone is corrected to the set temperature.

[0005] In such conventional load-linked air conditioning control technology, in order to converge air conditioning control parameters such as the AHU supply air temperature setting and the supply air volume of each zone to the optimal value, it is necessary to repeatedly perform CFD analysis for each air conditioning control cycle of about several minutes. However, because the CFD analysis process requires a huge amount of calculation processing, there is a problem that air conditioning control devices consisting of general industrial controllers cannot keep up with the air conditioning control cycle. For this reason, there is a problem that using an industrial controller with high calculation capacity increases the cost of the air conditioning control device. In addition, there is a problem that the responsiveness of the air conditioning control decreases when the air conditioning control cycle is extended.

[0006] Therefore, a heat load air conditioning control technology has been proposed that calculates the heat load required for air conditioning control based on surface temperature information from an infrared radiation temperature sensor, calculates the supply air temperature setting of the air conditioner based on this heat load, and calculates the supply air volume of each zone based on the supply air temperature setting (see Patent Document 3). With heat load air conditioning control technology, it is possible to eliminate the need for advanced and complicated calculation processing such as conventional CFD analysis processing.

[0007] The heat load air conditioning control technology disclosed in Patent Document 3 has the characteristic that it does not require a room temperature sensor because it can determine air conditioning parameters (supply air set temperature, supply air volume) from indoor surface temperature information. However, if the current value of the indoor temperature is unknown, if one wishes to set the cooling set temperature and the heating set temperature separately, it is not known which set temperature to aim for, and therefore there is a problem that the cooling set temperature and the heating set temperature cannot be set. In other words, the heat load air conditioning control disclosed in Patent Document 3 cannot be applied to an air conditioning system in which the cooling set temperature and the heating set temperature can be set separately. In addition, if the cooling set temperature and the heating set temperature cannot be set separately, there is no dead zone, and hunting in the air conditioning control is likely to occur. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2011-89677 A [Patent Document 2] JP 2015-36589 A [Patent Document 3] JP 2020-56546 A Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has been made to solve the above-mentioned problems, and aims to provide an air conditioning control device and method that makes it possible to set the cooling set temperature and the heating set temperature separately in heat load air conditioning control. [Means for solving the problem]

[0010] The air conditioning control device of the present invention includes a data acquisition unit configured to acquire surface temperature data of objects present in each zone that divides a space to be air-conditioned; a room temperature calculation unit configured to estimate the indoor temperature of each zone for each of the zones to be calculated, based on the surface temperature data of the zone to be calculated, the current supply air setting temperature of the air conditioner, and the current supply air volume to be supplied to the zone to be calculated from a variable air volume unit that receives a supply of conditioned air from the air conditioner; a set temperature determination unit configured to set the cooling set temperature of the zone to be calculated for a zone where the indoor temperature estimated value calculated by the room temperature calculation unit for the zone to be calculated is higher than the cooling set temperature of the zone, and to set the heating set temperature of the zone to be calculated for a zone where the indoor temperature estimated value for the zone to be calculated is lower than the heating set temperature of the zone; The system is characterized by comprising a heat load calculation unit configured to calculate, for each zone to be calculated, a zone heat load required to air-condition the zone to be calculated to the indoor set temperature based on data on a known contact area with the zone, and to calculate the air conditioner heat load to be supplied from the air conditioner to the variable air volume unit based on the zone heat load of each zone; a supply air temperature calculation unit configured to calculate a new value of the supply air set temperature based on the indoor set temperature of each zone and the air conditioner heat load; a supply air volume calculation unit configured to calculate, for each zone to be calculated, a new value of the supply air volume to be supplied to the zone to be calculated based on the new value of the supply air set temperature, the indoor set temperature of the zone to be calculated, and the zone heat load of the zone to be calculated; and an air conditioning instruction unit configured to notify an air conditioning controller that controls the air conditioner and the variable air volume unit of the new value of the supply air set temperature and the new value of the supply air volume.

[0011] In addition, in one configuration example of the air conditioning control device of the present invention, the set temperature determination unit is characterized in that, for zones where the indoor temperature estimated value of the zone to be calculated is equal to or lower than the cooling set temperature of the zone and equal to or higher than the heating set temperature of the zone, it determines the indoor set temperature so that the air conditioner operation mode of the zone becomes the fan mode. In addition, in one configuration example of the air conditioning control device of the present invention, the set temperature determination unit is characterized in that the average value of the surface temperatures of objects present in a zone where the indoor temperature estimated value of the zone to be calculated is equal to or lower than the cooling set temperature of the zone and equal to or higher than the heating set temperature of the zone, is set as the indoor set temperature of the zone. In addition, in one configuration example of the air conditioning control device of the present invention, the heat load calculation unit calculates, for each zone to be calculated, an object supply heat amount supplied to the zone from the surface of an object present in the zone to be calculated based on surface temperature data of the zone to be calculated, calculates, for each zone to be calculated, an adjacent zone supply heat amount supplied from the adjacent zone to the zone to be calculated based on the indoor set temperature of the zone to be calculated and the indoor set temperature of the adjacent zone and the contact area data, and calculates the sum of the object supply heat amount and the adjacent zone supply heat amount for each zone to be calculated to obtain the zone heat load. Furthermore, in one configuration example of the air conditioning control device of the present invention, the supply air temperature calculation unit calculates an average set temperature, which is the average value of the indoor set temperatures of each zone, and calculates a new value of the supply air set temperature based on the average set temperature, the known minimum airflow of the air conditioner, and the air conditioner thermal load.

[0012] The air-conditioning control method of the present invention includes a first step of acquiring surface temperature data of objects present in each zone that divides a space to be air-conditioned; a second step of estimating an indoor temperature for each of the zones to be calculated, based on the surface temperature data of the zone to be calculated, the current supply air setting temperature of the air conditioner, and the current supply air volume to be supplied to the zone to be calculated from a variable air volume unit that receives a supply of conditioned air from the air conditioner; a third step of setting the cooling setting temperature of the zone to be calculated for a zone to be calculated where the indoor temperature estimated value calculated in the second step for the zone to be calculated is higher than the cooling setting temperature of the zone, and setting the heating setting temperature of the zone to be calculated for a zone to be calculated where the indoor temperature estimated value for the zone to be calculated is lower than the heating setting temperature of the zone; a fourth step of calculating, for each zone to be calculated, a zone thermal load required to control the air conditioning of the zone to be calculated to the indoor set temperature based on data on a known contact area between the zone and an adjacent zone, and calculating the air conditioner thermal load to be supplied from the air conditioner to the variable air volume unit based on the zone thermal load of each zone; a fifth step of calculating a new value of the supply air set temperature based on the indoor set temperature and the air conditioner thermal load of each zone; a sixth step of calculating, for each zone to be calculated, a new value of the supply air volume to be supplied to the zone to be calculated based on the new value of the supply air set temperature, the indoor set temperature of the zone to be calculated, and the zone thermal load of the zone to be calculated; and a seventh step of notifying an air conditioning controller that controls the air conditioner and the variable air volume unit of the new value of the supply air set temperature and the new value of the supply air volume.

[0013] In addition, in one configuration example of the air conditioning control method of the present invention, the third step is characterized in that it includes a step of determining the indoor set temperature for a zone whose indoor temperature estimate value for the zone to be calculated is equal to or lower than the cooling set temperature for the zone and equal to or higher than the heating set temperature for the zone, so that the air conditioner operation mode for this zone is the fan mode. In addition, in one configuration example of the air conditioning control method of the present invention, the third step is characterized by including a step of setting the average value of the surface temperatures of objects present in a zone where the indoor temperature estimated value of the zone to be calculated is equal to or lower than the cooling set temperature of the zone and equal to or higher than the heating set temperature of the zone, as the indoor set temperature of the zone. Furthermore, in one configuration example of the air-conditioning control method of the present invention, the fourth step is characterized by including a step of calculating, for each zone to be calculated, an object supply heat amount supplied to the zone from the surface of an object present in the zone to be calculated based on surface temperature data of the zone to be calculated, calculating, for each zone to be calculated, an adjacent zone supply heat amount supplied from the adjacent zone to the zone to be calculated based on the indoor set temperature of the zone to be calculated and the indoor set temperature of the adjacent zone and the contact area data, and calculating the sum of the object supply heat amount and the adjacent zone supply heat amount for each zone to be calculated to obtain the zone thermal load. Furthermore, in one configuration example of the air conditioning control method of the present invention, the fifth step is characterized by including a step of calculating an average set temperature which is the average value of the indoor set temperatures of each zone, and calculating a new value of the supply air set temperature based on the average set temperature, the known minimum airflow of the air conditioner, and the air conditioner thermal load. Effect of the Invention

[0014] According to the present invention, by providing a room temperature calculation unit and a set temperature determination unit, it is possible to apply heat load air conditioning control to an air conditioning system in which the cooling set temperature and heating set temperature for each zone can be set individually. In the present invention, a dead zone can be set by the cooling set temperature and heating set temperature, so hunting in the air conditioning control can be prevented. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a block diagram showing the configuration of an air conditioning system according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a block diagram showing the configuration of an air conditioning controller according to an embodiment of the present invention. [Diagram 3] FIG. 3 is a flowchart illustrating the operation of the air conditioning control device, the air conditioning controller, and the VAV unit according to the embodiment of the present invention. [Figure 4] FIG. 4 is a diagram showing an example of the configuration of a computer that realizes an air conditioning control device and an air conditioning controller according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a block diagram showing the configuration of an air conditioning system according to an embodiment of the present invention. The air conditioning system 20 includes an air conditioning control device 10, an air conditioning controller 21, an air conditioner (AHU) 22, and VAV units 23-1 to 23-3 which are variable air volume units.

[0017] The air conditioning control device 10 is made up of an arithmetic processing device such as an industrial controller or a server device, and has the function of calculating and instructing supply air parameters such as the supply air volume and supply air set temperature used in the AHU 22 and VAV units 23-1 to 23-3 based on data detected from the space R to be air conditioned. The air conditioning control device 10 is connected to the air conditioning controller 21 and facility management device 31 of the facility management system 30 via communication line L1.

[0018] The air conditioning controller 21, AHU 22, and N (N is an integer equal to or greater than 2, and in this embodiment N=3) VAV units 23-1 to 23-3 are connected to each other via a communication line L2. The air conditioning controller 21 is an industrial controller, and has the function of controlling the AHU 22 and VAV units 23-1 to 23-3 based on air supply parameters instructed by the air conditioning control device 10.

[0019] The AHU 22 has a function of generating conditioned air at a supply temperature specified by the air conditioning controller 21, and sending the air to the VAV units 23-1 to 23-3. The VAV units 23-1 to 23-3 are general variable air volume units installed in each of multiple zones Z of the space R, and have the function of supplying conditioned air blown from the AHU 22 to the space R at the supply air volume specified by the air conditioning controller 21.

[0020] In the example of FIG. 1, a space R is divided into three (N=3) zones Z1, Z2, and Z3, and VAV units 23-1 to 23-3 are installed in each zone. In the following, this is generalized and one AHU 22 is installed in the space R, and N zones Z i A case will be described as an example in which N VAV units 23-i, which correspond one-to-one to (i=1, 2, . . . , N), are connected.

[0021] The number of zones and VAV units and the relationship between the zones and the VAV units are not limited to those in this embodiment, and it is sufficient that at least one VAV unit is placed in one zone. For example, if multiple VAV units are installed in one zone, the present invention can be applied in the same manner as described below by replacing these multiple VAV units with one representative VAV unit to calculate the supply air volume of the zone, and then dividing the finally obtained supply air volume among the respective VAV units.

[0022] Furthermore, the number of AHUs 22 is not limited to that in this embodiment. For example, even in a configuration in which a plurality of AHUs 22 are arranged in the space R and a plurality of VAV units are connected to each AHU 22, the present invention can be applied in the same manner as described below by calculating the air conditioner thermal load and supply air volume for each AHU 22 (for each air conditioning system).

[0023] The facility management system 30 manages each zone Z of a space R that is a management target facility. i Specifically, a system such as a human detection system may be used. The facility management system 30 mainly comprises a facility management device 31 and a plurality of infrared sensors 32, which are connected to each other via a communication line L3.

[0024] The facility management device 31 is an industrial controller, and processes the temperature distribution (thermal image) detected by each infrared sensor 32 to identify each zone Z. i The device has a function of detecting pairs of the surface temperature and the surface area of ​​each object present within the room and notifying the pair of surface temperature data to the air conditioning control device 10. If there are areas with different surface temperatures on the surface of an object, it is sufficient to detect pairs of the surface temperature and the surface area of ​​each of these areas separately.

[0025] For surface area, Zone Z i Alternatively, the projected area on the imaging surface when an object present in the vicinity of the infrared sensor 32 is imaged may be used. This makes it possible to obtain the surface area corresponding to the surface temperature detected by the infrared sensor 32, and the amount of heat supplied to the object Qw i The surface area of ​​the object may be calculated based on the projected area in a two-dimensional image captured by a single infrared sensor 32, or may be calculated three-dimensionally using multi-faceted images captured by two or more infrared sensors 32.

[0026] The infrared sensors 32 are composed of infrared sensors such as thermopiles, thermistors, and porometers, and have a function of detecting a temperature distribution indicating the surface temperature of an object O, such as a wall, floor, desk, PC, or person, located within their own detection range, and outputting the temperature distribution to the facility management device 31. Based on the detection range of each infrared sensor 32, the infrared sensors 32 may be distributed on, for example, the ceiling and walls of the space R so as to cover the entire space R.

[0027] Next, the configuration of the air conditioning control device 10 will be described in detail with reference to Fig. 1. The air conditioning control device 10 includes a communication I / F unit 11, an operation input unit 12, a display unit 13, a storage unit 14, and a calculation processing unit 15.

[0028] The communication I / F unit 11 has a function of performing data communication between the air conditioning controller 21 and the facility management device 31 via the communication line L1. The operation input unit 12 is made up of operation input devices such as a keyboard, a touch panel, a mouse, operation buttons, and switches, and has the function of detecting an operator's operation and outputting it to the calculation processing unit 15 . The display unit 13 is made up of display elements such as an LCD or an LED, and has the function of visually displaying the data output from the arithmetic processing unit 15 .

[0029] The memory unit 14 is made up of a storage device such as a hard disk or semiconductor memory, and has the function of storing a program 14P and various processing data used for the air conditioning control processing executed by the arithmetic processing unit 15. The program 14P is stored in advance in the memory unit 14 from an external device or recording medium connected to the air conditioning control device 10. The data stored in the memory unit 14 includes spatial shape data including shape data of the space R and position data of the VAV units 23-1 to 23-3, surface temperature data and human detection data acquired from the facility management system 30, and zone Z data. i The data includes zone data including position data and contact area data with adjacent zones, performance data of the AHU 22, and performance data of the VAV units 23-1 to 23-3.

[0030] The calculation processing unit 15 has a CPU (Central Processing Unit) and its peripheral circuits, and has a function of realizing various processing units by making the CPU work in cooperation with the program 14P in the storage unit 14. The main processing units realized by the calculation processing unit 15 include a data acquisition unit 150, a room temperature calculation unit 151, a set temperature determination unit 152, a heat load calculation unit 153, a supply air parameter calculation unit 154, and an air conditioning instruction unit 157. The supply air parameter calculation unit 154 is composed of a supply air temperature calculation unit 155 and a supply air volume calculation unit 156.

[0031] The data acquisition unit 150 receives the facility management information of each zone Z from the facility management device 31 of the facility management system 30 via the communication I / F unit 11 and the communication line L1. iA function of acquiring a pair of the surface temperature Tw and the surface area Aw of an object present in each zone Z and storing them as surface temperature data in the memory unit 14; i The facility management device 31 has a function of acquiring a human detection result of a person present within the facility and storing the result as human detection data in the memory unit 14. The data acquisition unit 150 and the heat load calculation unit 153 may calculate the surface temperature and surface area of ​​the object based on the thermal imaging data acquired from the facility management device 31.

[0032] The room temperature calculation unit 151 calculates the temperature of each zone Z i Indoor temperature Tcr i It has the function of estimating the above for each zone. The set temperature determination unit 152 determines the temperature of each zone Z i Indoor set temperature Tsp i It has the function of determining the above for each zone.

[0033] The heat load calculation unit 153 calculates the heat load of the zone Z based on the surface temperature data and the zone data acquired from the storage unit 14. i The indoor set temperature Tsp i Zone heat load Qz required for air conditioning control i The function to calculate the zone heat load Qz i Based on the air conditioner heat load Q to be supplied from AHU22 AHU It also has the function of calculating

[0034] More specifically, the heat load calculation unit 153 calculates the heat load of the zone Z based on the surface temperature data. i From the surface of the object in zone Z i The amount of heat supplied to the object Qw i and the ability to calculate zone Z based on zone data i Each adjacent zone Z r From Zone Z i Heat supply quantity Qr to adjacent zone i and the function to calculate the amount of heat supplied to the object Qw i and adjacent zone heat supply Qr i Zone Z i Zone heat load Qz iIt also has the function of calculating for each zone.

[0035] The supply air temperature calculation unit 155 calculates the temperature of each zone Z i Indoor set temperature Tsp i and air conditioner heat load Q AHU Based on this, it has a function of calculating the supply air set temperature Tsa of the AHU 22. More specifically, the supply air temperature calculation unit 155 calculates the temperature of each zone Z i Indoor set temperature Tsp i The function to calculate the average set temperature Tsp, which is the average of the above, and the minimum airflow W of the AHU22 AHUmin With the low pressure specific heat C and density ρ of air, the air conditioner heat load Q AHU and calculating the supply air set temperature Tsa by subtracting the result of the division from the average set temperature Tsp.

[0036] In addition, the supply air temperature calculation unit 155 has a function of setting the minimum supply air temperature as the supply air set temperature Tsa when the obtained supply air set temperature Tsa is lower than the minimum supply air temperature of the AHU 22, and a function of setting the maximum supply air temperature as the supply air set temperature Tsa when the obtained supply air set temperature Tsa is higher than the maximum supply air temperature of the AHU 22. The supply air volume calculation unit 156 calculates the supply air set temperature Tsa and the room set temperature Tsp i Based on the surface temperature data, each zone Z i Air supply volume Wz i It has the function of calculating for each zone.

[0037] The air conditioning instruction unit 157 receives the supply air set temperature Tsa of the AHU 22 calculated by the supply air temperature calculation unit 155 and the zone Z calculated by the supply air volume calculation unit 156. i Air supply volume Wz i The communication I / F unit 11 has a function of issuing instructions to the air conditioning controller 21 of the air conditioning system 20 via the communication I / F unit 11 and the communication line L1.

[0038] 2 is a block diagram showing the configuration of the air conditioning controller 21. The air conditioning controller 21 includes a communication I / F unit 24, a storage unit 25, and a calculation processing unit . The communication I / F unit 24 has a function of performing data communication with the air conditioning control device 10 via the communication line L1, and also performing data communication with the AHU 22 and the VAV units 23-1 to 23-3 via the communication line L2.

[0039] The memory unit 25 is made up of a storage device such as a hard disk or a semiconductor memory, and has a function of storing a program 25P and various processing data used for the air conditioning control processing executed by the arithmetic processing unit 26. The program 25P is stored in advance in the memory unit 25 from an external device or a recording medium connected to the air conditioning controller 21.

[0040] The calculation processing unit 26 has a CPU and its peripheral circuits, and has a function of realizing various processing functions by making the CPU work in cooperation with the program 25P in the storage unit 25. The main processing units realized by the calculation processing unit 26 include a receiving unit 260, an operation amount calculation unit 261, an intake air temperature control unit 262, an air volume calculation unit 263, an air volume control unit 264, and an air volume notification unit 265.

[0041] Next, the operations of the air conditioning control device 10, the air conditioning controller 21, and the VAV units 23-1 to 23-3 of this embodiment will be described with reference to FIG. First, the data acquisition unit 150 receives the facility management information of each zone Z from the facility management device 31 of the facility management system 30 via the communication I / F unit 11 and the communication line L1. i The surface temperature data (surface temperature Tw and surface area Aw) of the object present within the space is acquired and stored in the storage unit 14 (Step S100 in FIG. 3).

[0042] Next, the room temperature calculation unit 151 calculates the temperature of each zone Z i The surface temperature data of the objects present inside (surface temperature Tw and surface area Aw), the previous calculation result of the supply air setting temperature Tsa [℃], and the supply air volume Wz i [m 3 / s] and the indoor temperature Tcr i Based on the time since the last calculation of each zone Z i Indoor temperature Tcr iis estimated for each zone (step S101 in FIG. 3).

[0043]

number

[0044] The room temperature calculation unit 151 calculates the room temperature Tcr by the formula (1). i [℃] is estimated for each zone. C is the specific heat of air (≒1006 [J / (kg·℃)]), ρ is the density of air (≒1.2 [kg / m 3 ]), K m is the convective heat transfer coefficient of the surface (usually 9[W / (m 2 ·K)], S i [m 2 ] is Zone Z i Surface area of ​​Taverage i [℃] is Zone Z i is the average surface temperature.

[0045] Next, the set temperature determination unit 152 determines whether the temperature is within the range of the zone Z i Zone Z, established by residents of i Cooling setting temperature Tspc i and the zone Z calculated by the room temperature calculation unit 151 i Estimated indoor temperature Tcr i (Step S102 in FIG. 3) and the estimated indoor temperature Tcr i is the cooling setting temperature Tspc i If it is higher, the cooling setting temperature Tspc i Zone Z i Indoor set temperature Tsp i (Step S103 in FIG. 3).

[0046] The set temperature determination unit 152 determines the estimated indoor temperature Tcr i is the cooling setting temperature Tspc i Air conditioning system manager or Zone Z in the following cases: i Zone Z, established by residents of i Heating setting temperature Tsph i and Zone Z i Estimated indoor temperature Tcr i(Step S104 in FIG. 3) and the estimated indoor temperature Tcr i Heating setting temperature Tsph i If lower, the heating setting temperature Tsph i Zone Z i Indoor set temperature Tsp i (Step S105 in FIG. 3).

[0047] In addition, the set temperature determination unit 152 determines whether the zone Z i Estimated indoor temperature Tcr i Zone Z i Cooling setting temperature Tspc i Below and Zone Z i Heating setting temperature Tsph i If above, Zone Z i Zone Z is set to fan mode. i Indoor set temperature Tsp i (Step S106 in FIG. 3).

[0048] In the fan mode, which does not perform cooling or heating, air is supplied for the purpose of ventilation and humidity control in the room. i The average surface temperature Tw of the objects in zone Z i Indoor set temperature Tsp i Let us assume that. The set temperature determination unit 152 performs the above-mentioned processes of steps S102 to S106 for each zone.

[0049] Next, the heat load calculation unit 153 calculates the heat load for zone Z i The surface temperature data, the zone data stored in the storage unit 14, and the zone Z determined by the set temperature determination unit 152 i Indoor set temperature Tsp i Based on and Zone Z i The indoor set temperature Tsp i Zone heat load Qz required to control air conditioning i is calculated for each zone (step S107 in FIG. 3).

[0050] Zone Z i Zone heat load Qzi Zone Z i From objects present in Zone Z i The amount of heat supplied to the object Qw i And Zone Z i Adjacent zone Z adjacent to r From Zone Z i Heat supply quantity Qr to adjacent zone i Therefore, the zone heat load Qz i As shown in the following equation (2), the heat supply quantity Qw i and adjacent zone heat supply Qr i It can be calculated by adding Qz i =Qw i +Qr i (2)

[0051] Here, Zone Z i Surface temperature data of zone Z i The zone Z contains m sets (m = 1, 2, . . . , M, where M is an integer equal to or greater than 2) of data pairs of the surface temperature Tw and the surface area Aw of the object present within the zone Z. i The m-th surface temperature included in the surface temperature data is Tw (i,m) , surface temperature Tw (i,m) The m-th surface area that pairs with Aw (i,m) Let us assume that zone Z i From objects present in Zone Z i The convective heat transfer rate to air in Kw is the zone Z. i Set the indoor temperature to Tsp i Then, zone Z i From objects present in Zone Z i The amount of heat supplied to the object Qw i is calculated by the following formula (3). Note that the convection heat conductivity Kw can be calculated by using a known value, for example, as described in the literature "Tanaka Shunroku et al., "Latest Architectural Environmental Engineering," Inoue Shoin, Revised 3rd Edition, July 10, 2007."

[0052]

number

[0053] The zone data stored in advance in the storage unit 14 includes zone Z i and adjacent zone Z r (r=1,2,...,N, r≠i) and the tangent area Az (i,r) The data for adjacent zone Z is included. r From Zone Z i The convection heat conductivity of the adjacent zone Z to the air is Kz, and the set temperature determination unit 152 determines r Set the indoor temperature to Tn (i,r) =Tsp r Then, the adjacent zone Z r From Zone Z i Heat supply quantity Qr to adjacent zone i is calculated by the following formula (4): Note that the convection heat conductivity Kz may be empirically determined in advance through field experiments in the space R or through actual operation.

[0054]

number

[0055] The heat load calculation unit 153 calculates the amount of heat supplied to the object Qw by the formula (3). i Calculate for each zone and calculate the heat supply quantity Qr i Calculate for each zone and calculate the zone heat load Qz using equation (2). i is calculated for each zone (step S107).

[0056] After that, the heat load calculation unit 153 calculates the heat load for each zone Z i Zone heat load Qz i By summing these, the air conditioner heat load Q to be supplied from the AHU 22 to the VAV units 23-1 to 23-3 is calculated. AHU (Step S108 in FIG. 3).

[0057]

number

[0058] Next, the supply air temperature calculation unit 155 calculates the temperature of each zone Z i Indoor set temperature Tsp i The average set temperature Tsp is calculated (step S109 in FIG. 3). AHU Each zone Z in i Zone heat load Qz i By weighting, the indoor set temperature Tsp i The weighted average of these is used as the average set temperature Tsp.

[0059]

number

[0060] Next, the supply air temperature calculation unit 155 calculates the temperature of each zone Z i Average set temperature Tsp and air conditioner heat load Q AHU Based on this, the supply air set temperature Tsa of the AHU 22 is calculated (step S110 in FIG. 3). The minimum airflow rate of the AHU 22 set in accordance with the performance data stored in advance in the storage unit 14 is calculated as W AHUmin The low pressure specific heat of air is C(=1006[J / (kg K)]), and the density of air is ρ(=1.2[kg / m 3 ]), the supply air set temperature Tsa is calculated using the following equation (7).

[0061]

number

[0062] In addition, the supply air temperature calculation unit 155 checks whether the supply air set temperature Tsa calculated by the formula (7) is within the operable range of the AHU 22 set in the performance data (the minimum supply air temperature Tsa min and maximum supply air temperature Tsa max Specifically, the supply air temperature calculation unit 155 adjusts the supply air temperature Tsa calculated by the formula (7) so that the supply air temperature Tsa falls within the range of the minimum supply air temperature Tsa min If it is below the minimum supply air temperature Tsa minis the supply air set temperature Tsa, and the supply air set temperature Tsa calculated using equation (7) is the maximum supply air temperature Tsa max If it exceeds the maximum supply air temperature Tsa max is the supply air set temperature Tsa.

[0063] The supply air volume calculation unit 156 calculates the supply air volume setting temperature Tsa and the zone Z i Indoor set temperature Tsp i and zone heat load Qz i Based on and Zone Z i Air supply volume Wz i is calculated for each zone (step S112 in FIG. 3). If the low pressure specific heat of air is C and the density of air is ρ, the supply air volume Wz i can be calculated using the following equation (8).

[0064]

number

[0065] The air conditioning instruction unit 157 receives the supply air set temperature Tsa of the AHU 22 calculated by the supply air temperature calculation unit 155 and the zone Z calculated by the supply air volume calculation unit 156. i Air supply volume Wz i The air conditioning controller 21 is notified of this through the communication I / F unit 11 and the communication line L1 (Step S113 in FIG. 3).

[0066] The receiving unit 260 of the air conditioning controller 21 receives the supply air set temperature Tsa and the supply air flow rate Wz notified from the air conditioning control device 10 via the communication I / F unit 24 and the communication line L1. i The manipulated variable calculation unit 261 of the air conditioning controller 21 calculates the manipulated variable using a predetermined control calculation algorithm (for example, PID) so that the notified supply air set temperature Tsa and the supply air temperature of the AHU 22 match (FIG. 3, step S114).

[0067] The supply air temperature control unit 262 of the air conditioning controller 21 notifies the AHU 22 of the operation amount calculated by the operation amount calculation unit 261 via the communication I / F unit 24 and communication line L2 (step S115 in FIG. 3). In this way, the amount of heat medium (cold water or hot water) supplied to the cooling coil or heating coil of the AHU 22 is adjusted according to the operation amount, and the supply air temperature is controlled.

[0068] The air volume calculation unit 263 of the air conditioning controller 21 calculates the air volume of each zone Z i Air supply volume Wz i The total required air volume is calculated by adding up the values ​​of (FIG. 3, step S116). The air volume control unit 264 of the air conditioning controller 21 determines the fan rotation speed of the AHU 22 based on the value of the total required air volume, and controls the fan of the AHU 22 to achieve the determined fan rotation speed (FIG. 3, step S117). In this way, the volume of the supply air sent out from the AHU 22 is controlled.

[0069] On the other hand, the air volume notification unit 265 of the air conditioning controller 21 receives the air volume of each zone Z i Air supply volume Wz i are transmitted to the corresponding zones Z through the communication I / F unit 24 and the communication line L2. i Then, the VAV unit 23-i is notified of this (FIG. 3, step S118).

[0070] Each VAV unit 23-i receives the supply air volume Wz i In order to ensure this, the opening degree of the damper in the device itself is controlled (step S119 in FIG. 3). The air conditioning control device 10 executes the process of FIG. 3 at each preset air conditioning control period.

[0071] As described above, in this embodiment, heat load air conditioning control can be applied to an air conditioning system in which the cooling set temperature and heating set temperature for each zone can be set individually by providing room temperature calculation unit 151 and set temperature determination unit 152. In this embodiment, a dead zone can be set by the cooling set temperature and heating set temperature, so hunting in air conditioning control can be prevented.

[0072] The air conditioning control device 10 and the air conditioning controller 21 described in this embodiment can each be realized by a computer equipped with a CPU, a storage device, and an interface, and a program that controls these hardware resources. An example of the configuration of this computer is shown in FIG.

[0073] The computer comprises a CPU 300, a storage device 301, and an interface device (I / F) 302. In the case of the air conditioning control device 10, the communication I / F unit 11, the operation input unit 12, the display unit 13, etc. are connected to the I / F 302. In the case of the air conditioning controller 21, the communication I / F unit 24, etc. are connected to the I / F 302. In such a computer, a program for realizing the air conditioning control method of the present invention is stored in the storage device 301. The CPU 300 of each device executes the processing described in this embodiment in accordance with the program stored in the storage device 301. [Industrial Applicability]

[0074] The present invention can be applied to air conditioning control. [Explanation of symbols]

[0075] 10...air conditioning control device, 11, 24...communication I / F unit, 12...operation input unit, 13...display unit, 14, 25...memory unit, 15, 26...arithmetic processing unit, 20...air conditioning system, 21...air conditioning controller, 22...air conditioner, 23-1 to 23-3...VAV unit, 30...facility management system, 31...facility management device, 32...infrared sensor, 150...data acquisition unit, 151...room temperature calculation unit, 152...set temperature determination unit, 153...heat load calculation unit, 154...supply air parameter calculation unit, 155...supply air temperature calculation unit, 156...supply air volume calculation unit, 157...air conditioning instruction unit, 260...receiving unit, 261...operation amount calculation unit, 262...supply air temperature control unit, 263...air volume calculation unit, 264...air volume control unit, 265...air volume notification unit, R...space, Z i ...zone, L1, L2, L3...communication lines.

Claims

1. A data acquisition unit configured to acquire surface temperature data of objects present in each zone that divides a space to be air-conditioned; a room temperature calculation unit configured to estimate the room temperature of each of the zones as a calculation target, based on the surface temperature data of the calculation target zone, the current supply air temperature setting of the air conditioner, and the current supply air volume to be supplied to the calculation target zone from a variable air volume unit that receives a supply of conditioned air from the air conditioner; a set temperature determination unit configured to set the cooling set temperature of a zone to be calculated for a zone in which the estimated indoor temperature value calculated by the room temperature calculation unit for the zone is higher than the cooling set temperature of the zone, and to set the heating set temperature of the zone to be calculated for a zone in which the estimated indoor temperature value for the zone in which the calculation unit is lower than the heating set temperature of the zone; a heat load calculation unit configured to calculate, for each zone to be calculated, a zone heat load required for controlling the air conditioning of the zone to be calculated to the indoor set temperature based on the surface temperature data of the zone to be calculated and data on a known contact area between the zone to be calculated and an adjacent zone, and to calculate an air conditioner heat load to be supplied from the air conditioner to the variable air volume unit based on the zone heat load of each zone; a supply air temperature calculation unit configured to calculate a new value of the supply air set temperature based on an indoor set temperature of each zone and the air conditioner thermal load; a supply air volume calculation unit configured to calculate a new value of the supply air volume to be supplied to the zone to be calculated for each zone to be calculated based on the new value of the supply air set temperature, the indoor set temperature of the zone to be calculated, and the zone heat load of the zone to be calculated; An air conditioning control device comprising: an air conditioning instruction unit configured to notify an air conditioning controller that controls the air conditioner and the variable air volume unit of a new value of the supply air set temperature and a new value of the supply air volume.

2. 2. The air conditioning control device according to claim 1, The air conditioning control device is characterized in that, for zones where the indoor temperature estimated value of the zone to be calculated is equal to or lower than the cooling set temperature of the zone and equal to or higher than the heating set temperature of the zone, the set temperature determination unit determines the indoor set temperature so that the air conditioner operation mode of the zone becomes the fan mode.

3. 3. The air conditioning control device according to claim 2, The set temperature determination unit is characterized in that the average value of the surface temperatures of objects present in a zone where the indoor temperature estimated value of the zone to be calculated is equal to or lower than the cooling set temperature of the zone and equal to or higher than the heating set temperature of the zone, sets the indoor set temperature of the zone to be calculated.

4. 2. The air conditioning control device according to claim 1, The air conditioning control device is characterized in that the heat load calculation unit calculates, for each zone to be calculated, an object supply heat amount supplied to the zone from the surface of an object present in the zone to be calculated based on surface temperature data of the zone to be calculated, calculates, for each zone to be calculated, an adjacent zone supply heat amount supplied from the adjacent zone to the zone to be calculated based on the indoor set temperature of the zone to be calculated and the indoor set temperature of the adjacent zone and the contact area data, and calculates the sum of the object supply heat amount and the adjacent zone supply heat amount for each zone to be calculated to obtain the zone heat load.

5. 2. The air conditioning control device according to claim 1, An air conditioning control device characterized in that the supply air temperature calculation unit calculates an average set temperature, which is the average value of the indoor set temperatures of each zone, and calculates a new value of the supply air set temperature based on the average set temperature, the known minimum airflow of the air conditioner, and the air conditioner thermal load.

6. A first step of acquiring surface temperature data of objects present in each zone that divides a space to be air-conditioned; a second step of estimating the indoor temperature of each of the zones for which calculation is to be performed based on the surface temperature data of the zones for which calculation is to be performed, the current supply air temperature setting of the air conditioner, and the current supply air volume to be supplied to the zone for which calculation is to be performed from a variable air volume unit that receives a supply of conditioned air from the air conditioner; a third step of setting the cooling set temperature of a zone to be calculated for a zone in which the estimated indoor temperature value calculated in the second step is higher than the cooling set temperature of the zone, and setting the heating set temperature of the zone to be calculated for a zone in which the estimated indoor temperature value is lower than the heating set temperature of the zone; a fourth step of calculating, for each zone to be calculated, a zone heat load required for controlling the air-conditioning of the zone to be calculated to the indoor set temperature based on the surface temperature data of the zone to be calculated and data on a known contact area between the zone to be calculated and an adjacent zone, and calculating an air-conditioner heat load to be supplied from the air conditioner to the variable air volume unit based on the zone heat load of each zone; A fifth step of calculating a new value of the supply air set temperature based on the indoor set temperature of each zone and the air conditioner thermal load; a sixth step of calculating a new value of the supply air volume to be supplied to each of the zones to be calculated based on the new value of the supply air set temperature, the indoor set temperature of the zone to be calculated, and the zone heat load of the zone to be calculated; and a seventh step of notifying an air conditioning controller that controls the air conditioner and the variable air volume unit of the new value of the supply air set temperature and the new value of the supply air volume.

7. 7. The air conditioning control method according to claim 6, The third step is an air conditioning control method characterized in that it includes a step of determining, for a zone where the indoor temperature estimated value of the zone to be calculated is equal to or lower than the cooling set temperature of the zone and equal to or higher than the heating set temperature of the zone, determining the indoor set temperature so that the air conditioner operation mode of the zone is the fan mode.

8. The air conditioning control method according to claim 7, The third step is an air conditioning control method characterized in that it includes a step of setting the average value of the surface temperatures of objects present in a zone in which the indoor temperature estimated value of the zone to be calculated is equal to or lower than the cooling set temperature of the zone and equal to or higher than the heating set temperature of the zone, as the indoor set temperature of the zone.

9. 7. The air conditioning control method according to claim 6, The fourth step includes a step of calculating, for each zone to be calculated, an object supply heat amount supplied to the zone from the surface of an object present in the zone to be calculated based on surface temperature data of the zone to be calculated, calculating, for each zone to be calculated, an adjacent zone supply heat amount supplied from the adjacent zone to the zone to be calculated based on the indoor set temperature of the zone to be calculated and the indoor set temperature of the adjacent zone and data on the contact area, and calculating the sum of the object supply heat amount and the adjacent zone supply heat amount for each zone to be calculated to obtain the zone thermal load.

10. 7. The air conditioning control method according to claim 6, The air conditioning control method characterized in that the fifth step includes a step of calculating an average set temperature which is an average value of the indoor set temperatures of each zone, and calculating a new value of the supply air set temperature based on the average set temperature, the known minimum airflow of the air conditioner, and the air conditioner thermal load.

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