Air conditioner control device and method

Abstract

The invention provides an air conditioner control device and method. The present invention addresses the problem of making it possible to individually set a cooling setting temperature and a heating setting temperature in heat load air-conditioning control. A room temperature calculation unit (151) acquires, from a facility management system (30), surface temperature data of an object present in each partition into which a space to be air-conditioned is divided, and calculates the room temperature on the basis of the surface temperature data of the partition to be air-conditioned, the current air supply setting temperature of an AHU (22), and the current air supply volume to be supplied from VAV units (23-1) to VAV units (23-3) to the partition to be air-conditioned. The indoor temperature of each section is estimated for each section. The set temperature determination unit (152) sets the cooling set temperature as the indoor set temperature for a section in which the indoor temperature estimated value is higher than the cooling set temperature, and sets the heating set temperature as the indoor set temperature for a section in which the indoor temperature estimated value is lower than the heating set temperature.

Description

Technical Field

[0001] The present invention relates to an air conditioning control technology used in a VAV central air conditioning system, and more particularly to an air conditioning control device and method. Background Art

[0002] In recent years, a central air conditioning system of variable air volume (VAV) has been introduced as an air conditioning system in buildings such as buildings that have relatively spacious air-conditioning spaces. A central air conditioning system of VAV is a system in which a variable air volume type air conditioning device (VAV unit) is arranged in each partition set up by dividing the air-conditioning space into a plurality of partitions, and air supply regulated by an air conditioner (air handling unit (AHU)) is supplied to each partition, and the air supply volume sent to the air-conditioning space through the VAV unit of each partition is controlled.

[0003] In the past, in this type of VAV central air-conditioning system, as an air-conditioning control technology for optimally controlling the thermal environment of a certain partition within the air-conditioned space, a load-linked air-conditioning control technology has been proposed that utilizes CFD forward analysis and CFD inverse analysis, which is one of the distributed system simulations (for example, refer to Patent Documents 1 to 2).

[0004] This load-linked air conditioning control technology determines the optimal value related to the supply air setting temperature of the AHU or the air volume of each VAV by repeatedly performing CFD forward analysis processing and CFD inverse analysis processing in each air conditioning control cycle. Specifically, through CFD forward analysis processing, the temperature distribution in the air-conditioned space is derived based on boundary conditions such as the wall body related to the air-conditioned space, the blowout volume (air volume) or blowout temperature of the VAV, or the heating conditions of heating bodies such as the human body or personal computer (PC) existing in the air-conditioned space. In addition, through CFD inverse analysis processing, based on the temperature distribution obtained by the CFD forward analysis processing, the temperature of the object partition is corrected to the set temperature, and the air conditioning control parameters such as the supply air setting temperature of the AHU or the supply air volume of each partition are determined.

[0005] In this kind of conventional load-linked air conditioning control technology, in order to make the air conditioning control parameters such as the AHU air supply set temperature or the air supply volume of each partition converge to the optimal value, it is necessary to repeat the CFD analysis several times every air conditioning control cycle of about a few minutes. However, the CFD analysis process requires huge computational processing, so in air conditioning control devices including general industrial controllers, there is a problem that the processing cannot keep up with the air conditioning control cycle. Therefore, when using an industrial controller with high computing power, there is a problem that it becomes a factor in the cost increase of the air conditioning control device. In addition, when the air conditioning control cycle is extended, there is a problem that the responsiveness of the air conditioning control is reduced.

[0006] Therefore, a heat load air conditioning control technology is proposed, which calculates the heat load required for air conditioning control based on the surface temperature information obtained by the infrared radiation temperature sensor, calculates the air supply setting temperature of the air conditioner based on the heat load, and calculates the air supply volume of each partition based on the air supply setting temperature (see Patent Document 3). In the heat load air conditioning control technology, highly complex calculation processing such as the conventional CFD analysis processing is not required.

[0007] In the heat load air conditioning control technology disclosed in Patent Document 3, the air conditioning parameters (air supply setting temperature, air supply air volume) can be determined based on the indoor surface temperature information, so it has the characteristic of not requiring a room temperature sensor. However, there is the following problem: if the current value of the indoor temperature is unknown, then if it is assumed that the cooling setting temperature and the heating setting temperature are to be set separately, it is unknown which setting temperature should be used as the target, so the cooling setting temperature and the heating setting temperature cannot be set. That is, the heat load air conditioning control technology disclosed in Patent Document 3 cannot be applied to an air conditioning system in which the cooling setting temperature and the heating setting temperature can be set separately. In addition, if the cooling setting temperature and the heating setting temperature cannot be set separately, there is no dead zone, which easily causes fluctuations in air conditioning control.

[0008] [Prior art literature]

[0009] [Patent Document]

[0010] Patent Document 1: Japanese Patent Application Publication No. 2011-89677

[0011] Patent Document 2: Japanese Patent Application Publication No. 2015-36589

[0012] Patent Document 3: Japanese Patent Application Publication No. 2020-56546 Summary of the invention

[0013] [Problems to be solved by the invention]

[0014] The present invention is made to solve the above-mentioned problems, and an object of the present invention is to provide an air conditioning control device and method capable of separately setting a cooling set temperature and a heating set temperature in heat load air conditioning control.

[0015] [Technical means to solve the problem]

[0016] The air conditioning control device of the present invention comprises: a data acquisition unit, configured to acquire surface temperature data of objects existing in each partition into which a space of an air-conditioned object is divided; a room temperature calculation unit, configured to take each of the partitions as a calculation object, and estimate the indoor temperature of each partition for each partition of the calculation object based on the surface temperature data of the partition of the calculation object, the current supply air setting temperature of the air conditioner, and the current supply air volume to be supplied to the partition of the calculation object from a variable air volume unit that receives the supply of conditioned air from the air conditioner; a set temperature determination unit, configured to use the cooling setting temperature of the partition as the indoor setting temperature for a partition whose indoor temperature estimated value calculated by the room temperature calculation unit for the partition of the calculation object is higher than the cooling setting temperature of the partition, and to use the heating setting temperature of the partition as the indoor setting temperature for a partition whose indoor temperature estimated value is lower than the heating setting temperature of the partition; a heat load calculation unit, configured to use the estimated value of the indoor temperature of the partition of the calculation object based on the surface temperature data of the partition of the calculation object, the current supply air setting temperature of the air conditioner, and the current supply air volume to be supplied to the partition of the calculation object from a variable air volume unit that receives the supply of conditioned air from the air conditioner The surface temperature data and the data of the known contact area between the partition of the calculation object and the adjacent partition are used to calculate the partition heat load required for air-conditioning the partition of the calculation object to the indoor set temperature for each partition of the calculation object, and the air conditioner heat load supplied from the air conditioner to the variable air volume unit is calculated based on the partition heat load of each partition; a supply air temperature calculation unit is configured to calculate a new value of the supply air setting temperature based on the indoor set temperature of each partition and the air conditioner heat load; a supply air volume calculation unit is configured to calculate a new value of the supply air volume supplied to the partition of the calculation object for each partition of the calculation object based on the new value of the supply air setting temperature, the indoor set temperature of the partition of the calculation object and the partition heat load of the partition of the calculation object; and an air conditioning indication unit is configured to notify the air conditioning controller that controls the air conditioner and the variable air volume unit of the new value of the supply air setting temperature and the new value of the supply air volume.

[0017] In addition, in 1 structural example of the air-conditioning control device of the present invention, the set temperature determination unit determines the indoor set temperature for a zone where the estimated value of the indoor temperature of the calculation object is below the cooling set temperature of the zone and above the heating set temperature of the zone, so that the air-conditioning operation mode of the zone becomes an air supply mode.

[0018] In addition, in 1 structural example of the air-conditioning control device of the present invention, the set temperature determination unit uses the estimated value of the indoor temperature of the partition of the calculation object as the average value of the surface temperature of objects existing in the partition which is below the cooling set temperature of the partition and above the heating set temperature of the partition as the indoor set temperature of the partition.

[0019] In addition, in 1 structural example of the air-conditioning control device of the present invention, the heat load calculation unit calculates the object supply heat supplied from the surface of an object existing in the partition of the calculation object to the partition for each partition of the calculation object based on the surface temperature data of the partition of the calculation object, and calculates the adjacent partition supply heat supplied from the adjacent partition to the partition of the calculation object for each partition of the calculation object based on the indoor set temperature of the partition of the calculation object, the indoor set temperature of the adjacent partition and the contact area data, and calculates the sum of the object supply heat and the adjacent partition supply heat for each partition of the calculation object as the partition heat load.

[0020] In addition, in a structural example of the air conditioning control device of the present invention, the supply air temperature calculation unit calculates the average value of the indoor set temperatures of each partition, that is, the average set temperature, and calculates a new value of the supply air set temperature based on the average set temperature, the known minimum air volume of the air conditioner, and the heat load of the air conditioner.

[0021] In addition, the air conditioning control method of the present invention includes: a first step of acquiring surface temperature data of objects existing in each partition of the space of the air-conditioning object; a second step of taking each of the partitions as a calculation object, and estimating the indoor temperature of each partition for each partition of the calculation object based on the surface temperature data of the partition of the calculation object, the current supply air setting temperature of the air conditioner, and the current supply air volume that should be supplied from the variable air volume unit that receives the supply of conditioned air from the air conditioner to the partition of the calculation object; a third step of using the cooling setting temperature of the partition as the indoor setting temperature for the partition whose estimated indoor temperature calculated for the partition of the calculation object in the second step is higher than the cooling setting temperature of the partition, and using the heating setting temperature of the partition as the indoor setting temperature for the partition of the calculation object whose estimated indoor temperature is lower than the heating setting temperature of the partition; a fourth step of estimating the indoor temperature of the partition of the calculation object based on the surface temperature data of the partition of the calculation object, the current supply air setting temperature of the air conditioner, and the current supply air volume that should be supplied from the variable air volume unit that receives the supply of conditioned air from the air conditioner to the partition of the calculation object; The surface temperature data and the data of the known contact area between the partition of the calculation object and the adjacent partition are used to calculate the partition heat load required for air-conditioning the partition of the calculation object to the indoor set temperature for each partition of the calculation object, and the air conditioner heat load supplied from the air conditioner to the variable air volume unit is calculated based on the partition heat load of each partition; a fifth step is to calculate a new value of the supply air set temperature based on the indoor set temperature of each partition and the air conditioner heat load; a sixth step is to calculate a new value of the supply air volume supplied to the partition of the calculation object for each partition of the calculation object based on the new value of the supply air set temperature, the indoor set temperature of the partition of the calculation object and the partition heat load of the partition of the calculation object; and a seventh step is to notify the 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.

[0022] In addition, in a structural example 1 of the air conditioning control method of the present invention, the third step includes the following steps: for a zone whose indoor temperature estimated value is below the cooling set temperature of the zone and above the heating set temperature of the zone, the indoor set temperature is determined in such a way that the air conditioner operation mode of the zone becomes an air supply mode.

[0023] In addition, in a structural example 1 of the air conditioning control method of the present invention, the third step includes the following steps: the estimated value of the indoor temperature of the partition of the calculation object is the average value of the surface temperature of objects existing in the partition which is below the cooling setting temperature of the partition and above the heating setting temperature of the partition as the indoor setting temperature of the partition.

[0024] In addition, in a structural example 1 of the air conditioning control method of the present invention, the fourth step includes the following steps: based on the surface temperature data of the partition of the calculation object, for each partition of the calculation object, the object supply heat supplied from the surface of the object existing in the partition of the calculation object to the partition is calculated, and based on the indoor set temperature of the partition of the calculation object, the indoor set temperature of the adjacent partition and the contact area data, for each partition of the calculation object, the adjacent partition heat supply supplied from the adjacent partition to the partition of the calculation object is calculated, and for each partition of the calculation object, the sum of the object supply heat and the adjacent partition heat supply heat is calculated and used as the partition heat load.

[0025] In addition, in a structural example 1 of the air conditioning control method of the present invention, the fifth step includes the following steps: calculating the average value of the indoor set temperature of each partition, that is, the average set temperature, and calculating a new value of the supply air set temperature based on the average set temperature, the known minimum air volume of the air conditioner, and the heat load of the air conditioner.

[0026] [Effects of the Invention]

[0027] According to the present invention, by providing a room temperature calculation unit and a set temperature determination unit, heat load air conditioning control can be applied to an air conditioning system that can set the cooling set temperature and the heating set temperature of each partition separately. In the present invention, a dead zone can be set according to the cooling set temperature and the heating set temperature, so that fluctuations in air conditioning control can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a block diagram showing the configuration of an air conditioning system according to an embodiment of the present invention.

[0029] Figure 2 It is a block diagram showing the structure of an air-conditioning controller according to an embodiment of the present invention.

[0030] Figure 3 This is a flowchart for explaining the operation of the air conditioning control device, the air conditioning controller, and the VAV unit according to the embodiment of the present invention.

[0031] Figure 4 It is a diagram showing a configuration example of a computer that realizes the air-conditioning control device and the air-conditioning controller according to the embodiment of the present invention.

[0032] [Explanation of Symbols]

[0033] 10: Air conditioning control device

[0034] 11, 24: Communication I / F Department

[0035] 12: Operation input unit

[0036] 13: Display unit

[0037] 14, 25: Storage

[0038] 15, 26: Calculation processing unit

[0039] 20: Air conditioning system

[0040] 21: Air conditioning controller

[0041] 22: Air conditioner

[0042] 23-1~23-3:VAV unit

[0043] 30: Facility Management System

[0044] 31: Facility management device

[0045] 32: Infrared sensor

[0046] 150: Data Acquisition Department

[0047] 151: Room temperature calculation department

[0048] 152: Setting temperature determination unit

[0049] 153: Heat load calculation department

[0050] 154: Gas supply parameter calculation unit

[0051] 155: Supply air temperature calculation unit

[0052] 156: Air supply volume calculation department

[0053] 157: Air conditioning indicator

[0054] 260: Receiving Department

[0055] 261: Operation amount calculation unit

[0056] 262: Air supply temperature control unit

[0057] 263: Air volume calculation department

[0058] 264: Air volume control department

[0059] 265: Air volume notification department

[0060] R: Space

[0061] Zi: Partition

[0062] L1, L2, L3: Communication lines DETAILED DESCRIPTION

[0063] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Figure 1 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 as variable air volume units.

[0064] The air conditioning control device 10 includes a processing device such as an industrial controller or a server device, and has the following functions: based on the data detected from the air-conditioned space R, the air supply parameters such as the air supply volume and the air supply set temperature used in the AHU 22 and the VAV units 23-1 to 23-3 are calculated and instructed. The air conditioning control device 10 is connected to the air conditioning controller 21 and the facility management device 31 of the facility management system 30 via the communication line L1.

[0065] The air conditioning controller 21, the AHU 22, and N (N is an integer greater than or equal to 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 includes an industrial controller and has a function of controlling the AHU 22 and the VAV units 23-1 to 23-3 based on the air supply parameters instructed by the air conditioning control device 10.

[0066] The AHU 22 has a function of generating conditioned air of the supply air temperature designated by the air conditioning controller 21 and supplying the air to the VAV units 23 - 1 to 23 - 3 .

[0067] The VAV units 23 - 1 to 23 - 3 are general variable air volume units provided for each of the plurality of zones Z of the space R, and have a function of supplying conditioned air sent from the AHU 22 to the space R at a supply air volume specified by the air conditioning controller 21 .

[0068] exist Figure 1 In the example of FIG. 1 , a space R is divided into three (N=3) zones Z1, Z2, and Z3, and a VAV unit 23-1 to a VAV unit 23-3 are provided in each zone. In the following, this is generalized and one AHU 22 is configured for the space R, and the AHU 22 is connected to the N zones Z1, Z2, and Z3. i The following description will take as an example a case where N VAV units 23 - i (i=1, 2, . . . N) correspond one to one.

[0069] In addition, the number of partitions and VAV units or the relationship between partitions and VAV units is not limited to the present embodiment, as long as one VAV unit is configured in at least one partition. For example, in the case where multiple VAV units are provided in one partition, as long as these multiple VAV units are replaced with one representative VAV unit and the air supply volume of the partition is calculated, and the finally obtained air supply volume is distributed through each VAV unit, the present invention can be applied in the same manner as in the following case.

[0070] In addition, the number of AHUs 22 is not limited to the present embodiment. For example, even in a configuration where 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 in the following case as long as the air conditioner heat load and the air supply volume are calculated for each AHU 22 (each air conditioning system).

[0071] The facility management system 30 is used to manage each zone Z of the space R of the facility to be managed. i The existing system for managing the state of the facility management system 30 may be a human detection system or the like. The facility management system 30 includes a facility management device 31 and a plurality of infrared sensors 32 connected to each other via a communication line L3 as main components.

[0072] The facility management device 31 includes an industrial controller and has the following functions: by performing image processing on the temperature distribution (thermal image) detected by each infrared sensor 32, the temperature distribution (thermal image) of each zone Z is detected. i The surface temperature and surface area of ​​the object existing in the air conditioner are detected and notified to the air conditioning control device 10 as surface temperature data. In addition, when there are areas with different surface temperatures on the surface of an object, the surface temperature and surface area are detected for each of these areas.

[0073] Regarding the surface area, it is also possible to use infrared sensors 32 to detect the partition Z i The projection area on the imaging surface when the object existing in the image is imaged. Thus, the surface area corresponding to the surface temperature detected by the infrared sensor 32 can be obtained, and the object supply heat Qw described later can be calculated more accurately. i In addition, when calculating the surface area of ​​an object, it can be calculated based on the projected area in a two-dimensional image captured by a single infrared sensor 32, or it can be configured to use multi-faceted images captured by more than two infrared sensors 32 to calculate the surface area in three dimensions.

[0074] The infrared sensor 32 includes infrared sensors of thermopile, thermistor, porometer type, etc., and has the following functions: detect the temperature distribution indicating the surface temperature of the object O such as the wall, floor, table, PC, person, etc. located within its detection range and output it to the facility management device 31. Based on the detection range of each infrared sensor 32, the infrared sensors 32 can be dispersedly arranged on the ceiling or wall of the space R so as to cover the entire space R, for example.

[0075] Next, refer to Figure 1 The configuration of the air conditioning control device 10 will be described in detail. The air conditioning control device 10 includes a communication interface (I / F) unit 11 , an operation input unit 12 , a display unit 13 , a storage unit 14 , and a calculation processing unit 15 .

[0076] The communication I / F unit 11 has a function of performing data communication with the air-conditioning controller 21 and the facility management device 31 via the communication line L1 .

[0077] The operation input unit 12 includes operation input devices such as a keyboard, a touch screen, a mouse, operation buttons, and switches, and has a function of detecting an operator's operation and outputting the result to the calculation processing unit 15 .

[0078] The display unit 13 includes a display element such as a liquid crystal display (LCD) or a light emitting diode (LED), and has a function of visually displaying data output from the calculation processing unit 15 .

[0079] The storage unit 14 includes a storage device such as a hard disk or a semiconductor memory, and has a function of storing a program 14P or various processing data used in the air conditioning control process executed by the calculation processing unit 15. The program 14P is stored in the storage unit 14 in advance from an external device or a recording medium connected to the air conditioning control device 10. The data stored in the storage unit 14 include space shape data including shape data of the space R or position data of the VAV units 23-1 to 23-3, surface temperature data or human detection data obtained from the facility management system 30, and data including the partition Z. i The partition data including the position data or the contact area data with the adjacent partitions, the performance data of the AHU 22 or the performance data of the VAV units 23-1 to 23-3, and the like.

[0080] The calculation processing unit 15 has a central processing unit (CPU) and its peripheral circuits, and has the functions of realizing various processing units by making the CPU work in cooperation with the program 14P of 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, an air supply parameter calculation unit 154, and an air conditioning instruction unit 157. The air supply parameter calculation unit 154 includes an air supply temperature calculation unit 155 and an air supply air volume calculation unit 156.

[0081] The data acquisition unit 150 has a function of acquiring the data 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 Tw and the surface area Aw of the object existing in the partition are stored in the storage unit 14 as surface temperature data; and the surface temperature Tw and the surface area Aw of the object existing in the partition are stored in the storage unit 14 as surface temperature data; and i The human detection result obtained by detecting the human presence inside is stored as human detection data in the storage unit 14. In addition, regarding the surface temperature or surface area of ​​the object, the data acquisition unit 150 or the heat load calculation unit 153 can also calculate the surface temperature or surface area based on the thermal image data obtained from the facility management device 31.

[0082] The room temperature calculation unit 151 has a method for calculating the room temperature Z for each zone. i Indoor temperature Tcr i Function to make inferences.

[0083] The set temperature determination unit 152 has a function of determining the temperature of each zone Z for each zone. i Indoor set temperature Tsp i function.

[0084] The heat load calculation unit 153 includes a function of calculating the temperature of the partition Z for each partition pair based on the surface temperature data and the partition data acquired from the storage unit 14. i Air conditioning control sets the indoor temperature Tsp i Required zone heat load Qz i Calculate; and based on these zone heat loads Qz i Corresponding to the air conditioner heat load Q supplied from AHU 22 AHU Perform calculations.

[0085] More specifically, the heat load calculation unit 153 has the following functions: i The surface of the object is supplied to the zone Z i The object supplies heat Qw i Calculate based on partition data from partition Zi Each adjacent partition Z r Supply to Zone Z i The adjacent partition supplies heat Qr i Calculate; and supply heat Qw to the object for each partition i Supply heat Qr to adjacent partitions i The sum of is calculated as the partition Z i The zone heat load Qz i .

[0086] The supply air temperature calculation unit 155 has a temperature calculation unit based on each zone Z. i Indoor set temperature Tsp i and the air conditioner heat load Q AHU A function for calculating the supply air set temperature Tsa of the AHU 22.

[0087] More specifically, the supply air temperature calculation unit 155 has the following functions: i Indoor set temperature Tsp i The average value of the air conditioner heat load Q is calculated. AHU Divide by the minimum air volume W of AHU 22 AHUmin As well as the low-pressure specific heat C and density ρ of the air, and the obtained division result is subtracted from the average set temperature Tsp, thereby calculating the supply air set temperature Tsa.

[0088] In addition, the supply air temperature calculation unit 155 has the following functions: when the obtained supply air setting temperature Tsa is lower than the minimum supply air temperature of AHU22, the minimum supply air temperature is set to the supply air setting temperature Tsa; and when the obtained supply air setting temperature Tsa exceeds the maximum supply air temperature of AHU22, the maximum supply air temperature is set to the supply air setting temperature Tsa.

[0089] The supply air volume calculation unit 156 has a flow rate calculation unit based on the supply air setting temperature Tsa and the indoor setting temperature Tsp. i And surface temperature data, for each partition Z i Air supply volume Wz i Function that performs calculations.

[0090] The air conditioning instruction unit 157 has a function of instructing the air conditioning controller 21 of the air conditioning system 20 via the communication I / F unit 11 and the communication line L1 to set the supply air setting 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 .

[0091] Figure 2 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 26.

[0092] 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 performing data communication with the AHU 22 and the VAV units 23 - 1 to 23 - 3 via the communication line L2 .

[0093] The storage unit 25 includes a storage device such as a hard disk or a semiconductor memory, and has a function of storing a program 25P or various processing data used in the air conditioning control process executed by the calculation processing unit 26. The program 25P is stored in the storage unit 25 in advance from an external device or a recording medium connected to the air conditioning controller 21.

[0094] The calculation processing unit 26 has a CPU and its peripheral circuits, and has the functions of realizing various processing units by making the CPU work in cooperation with the program 25P of 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, a supply air temperature control unit 262, an air volume calculation unit 263, an air volume control unit 264, and an air volume notification unit 265.

[0095] Next, refer to Figure 3 The operations of the air conditioning control device 10, the air conditioning controller 21, and the VAV units 23-1 to 23-3 of the present embodiment will be described.

[0096] First, the data acquisition unit 150 acquires the data 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 existing in the storage unit 14 is stored in the storage unit 14 ( Figure 3 Step S100).

[0097] Then, the room temperature calculation unit 151 calculates the room temperature of each zone Z based on the i The surface temperature data of the objects in the room (surface temperature Tw and surface area Aw), the last calculation result of the supply air setting temperature Tsa[℃], and the supply air volume Wz i [m 3 / s] the last calculation result, indoor temperature Tcr i The time elapsed since the last calculation of Z for each partition i Indoor temperature Tcr i Make an inference ( Figure 3 Step S101).

[0098] [Formula 1]

[0099]

[0100] The room temperature calculation unit 151 calculates the room temperature Tcr for each zone according to equation (1). i [℃] is estimated. C is the specific heat of air ρ is the density of air Km is the convective thermal conductivity of the surface (usually 9[W / (m 2 ·K)]), S i [m 2 ] is partition Z i Surface area, Taverage i [℃] is partition Z i The average surface temperature.

[0101] Next, the set temperature determination unit 152 sends a request to the administrator of the air conditioning system or the zone Z. i The occupants set the zone Z i Refrigeration set temperature Tspc i and the partition Z calculated by the room temperature calculation unit 151 i Estimated value of indoor temperature Tcr i For comparison ( Figure 3 Step S102), the estimated value Tcr of the indoor temperature i Higher than the cooling set temperature Tspc i In this case, the cooling set temperature Tspc i As Partition Z i Indoor set temperature Tsp i ( Figure 3 Step S103).

[0102] The set temperature determination unit 152 sets the estimated value Tcr of the indoor temperature i Set the temperature Tspc for cooling i In the following cases, the air conditioning system manager or zone Z i The occupants set the zone Z i Heating set temperature Tsph i and Partition Z i Estimated value of indoor temperature Tcr i For comparison ( Figure 3 Step S104), the estimated value Tcr of the indoor temperature i Lower than the heating set temperature Tsph i In the case of i As Partition Z i Indoor set temperature Tsp i ( Figure 3Step S105).

[0103] In addition, the set temperature determination unit 152 sets the temperature of the zone Z. i Estimated value of indoor temperature Tcr i For partition Z i Refrigeration set temperature Tspc i Below and partition Z i Heating set temperature Tsph i In the above case, partition Z i The way the air conditioner operation mode changes to the air supply mode determines the zone Z i Indoor set temperature Tsp i ( Figure 3 Step S106).

[0104] In the air supply mode for neither cooling nor heating, air supply is performed for the purpose of indoor ventilation and humidity control. The set temperature determination unit 152 sets the temperature of the zone Z to i The average surface temperature Tw of the objects in the partition Z is taken as i Indoor set temperature Tsp i .

[0105] The set temperature determination unit 152 performs the above-described processing of steps S102 to S106 for each zone.

[0106] Next, the heat load calculation unit 153 calculates the heat load based on the zone Z. i The surface temperature data of the partition Z, the partition data stored in the storage unit 14, and the partition Z determined by the set temperature determination unit 152 i Indoor set temperature Tsp i For each partition pair, partition Z i Air conditioning control sets the indoor temperature Tsp i Required zone heat load Qz i Calculate ( Figure 3 Step S107).

[0107] Partition Z i The zone heat load Qz in i To summarize: From partition Z i The objects in the area are supplied to the partition Z. i The object supplies heat Qw i and from partition Z i Adjacent adjacent partition Z r Supply to Zone Z i The adjacent partition supplies heat Qr i Therefore, the partition heat load Qz i As shown in the following formula (2), the heat Qw supplied by these objects is iSupply heat Qr to adjacent partitions i Find the sum of .

[0108] QZ i =Qw i +Qr i (2)

[0109] Here, set partition Z i The surface temperature data of the partitions Z includes m groups (m=1, 2, ..., M, M is an integer greater than 2) i The data set of the surface temperature Tw and the surface area Aw of the object existing in the partition Z i The surface temperature data of the mth surface temperature is set to Tw (i，m) , will be with the surface temperature Tw (i，m) The area of ​​the mth surface in the group is set to Aw (i，m) , will be from partition Z i Objects existing in the partition Z i The convection heat conductivity of the air is Kw, and the partition Z i The indoor set temperature is set to Tsp i , then from partition Z i The objects in the area are supplied to the partition Z. i The object supplies heat Qw i It is obtained from the following formula (3). As the convective heat conductivity Kw, for example, a known value described in the document "Tanaka Shunroku et al., Latest Building Environmental Engineering, Inoue Shoin, revised third edition, July 10, 2007" may be used.

[0110] [Formula 2]

[0111] QUR i =Kw∑ m {Aw (i，m) (Tw (i，m) -Tsp i )} (3)

[0112] The partition data pre-stored in the storage unit 14 includes partition Z i and adjacent partition Z r Contact area Az (r=1,2,····,N,r≠i) (i，r) If we want to add data from adjacent partition Z r To Partition Z i The convection heat conductivity of the air is Kz, and the adjacent partition Z determined by the set temperature determination unit 152 is set r The indoor set temperature is set to Tn (i，r) =Tsp r , then from the adjacent partition Z rSupply to Zone Z i The adjacent partition supplies heat Qr i It is obtained by the following formula (4). The convective heat conductivity Kz may be determined empirically by a previous field experiment in the space R or actual operation.

[0113] [Formula 3]

[0114] QUR i =Kz∑ r {Az (i，r) (Tn (i，r) -Tsp i )} (4)

[0115] The heat load calculation unit 153 only needs to calculate the heat Qw supplied to the object for each partition according to equation (3): i Calculate the heat supply Qr for each partition to the adjacent partition according to formula (3) i Calculate and calculate the heat load Qz for each partition according to formula (2) i Just perform the calculation (step S107).

[0116] Then, the heat load calculation unit 153 calculates the heat load of each partition Z as shown in the following formula (5). i The zone heat load Qz i The total corresponds to the air conditioner heat load Q supplied from AHU 22 to VAV units 23-1 to 23-3. AHU Calculate ( Figure 3 Step S108).

[0117] [Formula 4]

[0118] Q AHU =∑ i QZ i (5)

[0119] Next, the supply air temperature calculation unit 155 calculates the supply air temperature for each zone Z as shown in the following equation (6): i Indoor set temperature Tsp i The average value of the set temperature Tsp is calculated ( Figure 3 Step S109). Here, the air conditioner heat load Q AHU Each partition Z i The zone heat load Qz i The indoor set temperature Tsp i The weighted average value is taken as the average set temperature Tsp.

[0120] [Formula 5]

[0121]

[0122] Then, the supply air temperature calculation unit 155 calculates the temperature of each zone Z based on the i The average set temperature Tsp and the air conditioner heat load Q AHU , calculate the supply air set temperature Tsa of AHU 22 ( Figure 3 Step S110) The minimum air volume of the AHU 22 set by the performance data pre-stored in the storage unit 14 is set to W. AHUmin , the low-pressure specific heat of air is set to C (=1006 [J / (kg·K)]), the density of air is set to ρ (=1.2 [kg / m 3 ]), the supply air setting temperature Tsa is calculated by the following formula (7).

[0123] [Formula 6]

[0124]

[0125] In addition, the supply air temperature calculation unit 155 calculates the supply air setting temperature Tsa calculated by the formula (7) within the operable range of the AHU 22 set by the performance data (the minimum supply air temperature Tsa min and the maximum supply air temperature Tsa max within the range) Figure 3 Step S111) Specifically, when the supply air temperature calculation unit 155 calculates the supply air setting temperature Tsa from the equation (7) to be lower than the minimum supply air temperature Tsa, min In the case of min As the supply air setting temperature Tsa, when the supply air setting temperature Tsa calculated by equation (7) is higher than the maximum supply air temperature Tsa max In the case of max Set the supply air temperature Tsa.

[0126] The supply air volume calculation unit 156 calculates the supply air volume based on the supply air setting temperature Tsa and the zone Z. i Indoor set temperature Tsp i And the zone heat load Qz i , for each partition, partition Z i Air supply volume Wz i Calculate ( Figure 3 Step S112). If the low-pressure specific heat of air is set to C and the density of air is set to ρ, then the air supply volume Wz i It can be obtained by the following formula (8).

[0127] [Formula 7]

[0128]

[0129] The air conditioning instruction unit 157 calculates the supply air setting 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 via the communication I / F unit 11 and the communication line L1 ( Figure 3 Step S113).

[0130] The receiving unit 260 of the air conditioning controller 21 receives the supply air setting temperature Tsa and the supply air volume Wz notified from the air conditioning control device 10 via the communication I / F unit 24 and the communication line L1. i The operation amount calculation unit 261 of the air conditioning controller 21 calculates the operation amount by a predetermined control operation algorithm (e.g., proportional integral derivative (PID)) in such a way that the notified supply air setting temperature Tsa is consistent with the supply air temperature of the AHU 22. Figure 3 Step S114).

[0131] 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 the communication line L2. Figure 3 Step S115) In this way, the amount of heat transfer 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, thereby controlling the supply air temperature.

[0132] The air volume calculation unit 263 of the air conditioning controller 21 calculates the air volume of each zone Z notified from the air conditioning control device 10. i Air supply volume Wz i The total required air volume is calculated by adding up the values ​​of Figure 3 Step S116).

[0133] The air volume control unit 264 of the air conditioning controller 21 determines the fan speed of the AHU 22 based on the value of the total required air volume, and controls the fan of the AHU 22 so as to achieve the determined fan speed ( Figure 3 Step S117). In this way, the air volume of the supply air sent from the AHU 22 is controlled.

[0134] On the other hand, the air volume notification unit 265 of the air conditioning controller 21 notifies each zone Z of the air volume notification from the air conditioning control device 10. i Air supply volume Wz i The corresponding partition Z is notified via the communication I / F unit 24 and the communication line L2. i VAV unit 23-i( Figure 3Step S118).

[0135] Each VAV unit 23-i ensures the supply air volume Wz notified from the air conditioning controller 21. i The opening of the damper in the device is controlled by Figure 3 Step S119).

[0136] The air conditioning control device 10 executes the following operations at each preset air conditioning control cycle: Figure 3 processing.

[0137] As described above, in this embodiment, the heat load air conditioning control can be applied to an air conditioning system that can set the cooling set temperature and the heating set temperature of each partition separately by providing the room temperature calculation unit 151 and the set temperature determination unit 152. In this embodiment, the dead zone can be set according to the cooling set temperature and the heating set temperature, so that the fluctuation of the air conditioning control can be avoided.

[0138] The air conditioning control device 10 and the air conditioning controller 21 described in this embodiment can be implemented by a computer including a CPU, a storage device, and an interface, and a program for controlling these hardware resources. Figure 4 An example of the structure of the computer is shown in FIG.

[0139] The computer includes 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 according to the program stored in the storage device 301.

[0140] [Industrial Applicability]

[0141] The present invention can be applied to air conditioning control.

Claims

1. An air conditioning control device, characterized in that: include: A data acquisition unit configured to acquire surface temperature data of objects existing in each partition into which the air-conditioning target space is divided; a room temperature calculation unit configured to estimate the indoor temperature of each of the partitions as a calculation object, based on the surface temperature data of the partition of the calculation object, the current supply air setting temperature of the air conditioner, and the current supply air volume to be supplied to the partition of the calculation object from the variable air volume unit that receives the supply of conditioned air from the air conditioner; a set temperature determination unit configured to set the cooling set temperature of the zone as the indoor set temperature for a zone where the estimated indoor temperature 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 as the indoor set temperature for a zone where the estimated indoor temperature value of the zone to be calculated is lower than the heating set temperature of the zone; a heat load calculation unit configured to calculate a zone heat load required for air-conditioning the zone of the calculation target to the indoor set temperature for each of the zones of the calculation target based on the surface temperature data of the zone of the calculation target and the known contact area data between the zone of the calculation target and an adjacent zone, and to calculate an air conditioner heat load 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 setting temperature based on the indoor setting temperature of each zone and the air conditioner heat load; a supply air volume calculation unit configured to calculate a new value of the supply air volume supplied to each of the zones of the calculation target based on the new value of the supply air setting temperature, the indoor setting temperature of the zone of the calculation target, and the zone heat load of the zone of the calculation target; and An air conditioning instruction unit is 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 setting temperature and a new value of the supply air volume.

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

3. The air conditioning control device according to claim 2, characterized in that: The set temperature determination unit uses, as the indoor set temperature of the zone, an average value of surface temperatures of objects existing in the zone where the estimated indoor temperature value of the zone to be calculated is lower than the cooling set temperature of the zone and higher than the heating set temperature of the zone.

4. The air conditioning control device according to claim 1, characterized in that: The heat load calculation unit calculates, for each partition of the calculation object, the object supply heat supplied from the surface of an object existing in the partition of the calculation object to the partition, based on the surface temperature data of the partition of the calculation object, and calculates, for each partition of the calculation object, the adjacent partition supply heat supplied from the adjacent partition to the partition of the calculation object based on the indoor set temperature of the partition of the calculation object, the indoor set temperature of the adjacent partition and the contact area data, and calculates, for each partition of the calculation object, the sum of the object supply heat and the adjacent partition supply heat as the partition heat load.

5. The air conditioning control device according to claim 1, characterized in that: The supply air temperature calculation unit calculates an average set temperature which is an 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 air volume of the air conditioner, and the air conditioner heat load.

6. An air conditioning control method, characterized in that: include: The first step is to obtain the surface temperature data of objects existing in each partition into which the space of the air-conditioning object is divided; The second step is to estimate the indoor temperature of each of the partitions as a calculation object based on the surface temperature data of the partition of the calculation object, the current supply air setting temperature of the air conditioner, and the current supply air volume to be supplied to the partition of the calculation object from the variable air volume unit that receives the supply of conditioned air from the air conditioner. In a third step, for a zone whose estimated indoor temperature value calculated for the zone to be calculated in the second step is higher than the cooling setting temperature of the zone, the cooling setting temperature of the zone is used as the indoor setting temperature, and for a zone whose estimated indoor temperature value for the zone to be calculated is lower than the heating setting temperature of the zone, the heating setting temperature of the zone is used as the indoor setting temperature; The fourth step is to calculate the zone heat load required for air-conditioning the zone of the calculation object to the indoor set temperature for each of the zones of the calculation object based on the surface temperature data of the zone of the calculation object and the known contact area data between the zone of the calculation object and the adjacent zone, and calculate the air conditioner heat load supplied from the air conditioner to the variable air volume unit based on the zone heat load of each zone; The fifth step is to calculate a new value of the supply air setting temperature based on the indoor setting temperature of each partition and the heat load of the air conditioner; The sixth step is to calculate a new value of the supply air volume supplied to each of the zones of the calculation object based on the new value of the supply air setting temperature, the indoor setting temperature of the zone of the calculation object, and the zone heat load of the zone of the calculation object; as well as In a seventh step, an air conditioning controller that controls the air conditioner and the variable air volume unit is notified of a new value of the supply air setting temperature and a new value of the supply air volume.

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

8. The air conditioning control method according to claim 7, characterized in that: The third step includes the step of setting the estimated indoor temperature of the zone to be calculated as the average value of the surface temperatures of objects existing in the zone where the estimated indoor temperature of the zone is lower than the cooling setting temperature of the zone and higher than the heating setting temperature of the zone.

9. The air conditioning control method according to claim 6, characterized in that: The fourth step includes the following steps: based on the surface temperature data of the partition of the calculation object, for each partition of the calculation object, the object supply heat supplied from the surface of the object existing in the partition of the calculation object to the partition, and based on the indoor set temperature of the partition of the calculation object, the indoor set temperature of the adjacent partition and the contact area data, for each partition of the calculation object, the adjacent partition heat supply supplied from the adjacent partition to the partition of the calculation object is calculated, and for each partition of the calculation object, the sum of the object supply heat and the adjacent partition heat supply is calculated and used as the partition heat load.

10. The air conditioning control method according to claim 6, characterized in that: The fifth step includes the following steps: calculating the average value of the indoor set temperatures of each partition, i.e., the average set temperature, and calculating a new value of the supply air set temperature based on the average set temperature, the known minimum air volume of the air conditioner, and the heat load of the air conditioner.

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