Intelligent building central air conditioning intelligent control system and method

Abstract

The application discloses a central air conditioner intelligent control system and method of intelligent building, wherein the system comprises a compressor group, the compressor group is communicated with a plurality of ventilation areas through air pipes, a regional control terminal is arranged in the ventilation area, the regional control terminal is respectively communicated with a user terminal and a centralized control terminal, the user terminal is communicated with the centralized control terminal, the centralized control terminal is communicated with a compressor group control terminal, and the compressor group control terminal is electrically connected with the compressor group; the air pipe comprises a main air duct, a plurality of first air ducts and second air ducts, the main air duct is communicated with the compressor group, and the main air duct is communicated with a plurality of branch air ducts. By arranging the main air duct adjuster and the branch air duct adjuster between each ventilation area and the corresponding air duct respectively, the ventilation line and the number of compressor operation units can be adaptively adjusted according to the personnel state of each ventilation area, and the whole realizes efficient ventilation, energy saving and environmental protection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent buildings, in particular to a central air conditioner intelligent control system and method for intelligent buildings. BACKGROUND

[0002] At present, with the rapid development of intelligent building technology, basically, the building can realize space visualization, energy consumption management visualization, security monitoring visualization, personnel positioning visualization and environment monitoring visualization. Among them, in the aspect of space visualization, the digital twin technology is mainly used to visualize the building appearance, internal space structure and main management facilities and equipment, and to comprehensively analyze the space resource use and environmental data. In the aspect of energy visualization, according to the real-time energy consumption monitoring data, the air conditioner, elevator, lighting, water supply, ventilation, communication, security, machine room and other power consumption conditions are comprehensively displayed in the building digital twin scene, including classification statistical panel, partition statistical panel and historical trend chart, so that the management can accurately master the energy cost proportion and development trend, and formulate energy-saving strategies, and assist in building energy-saving and emission-reduction planning. In the aspect of installation monitoring visualization, the image recognition technology is used to integrate video monitoring, fire management, environmental monitoring and other systems, and to provide alarm disposal linkage mechanism to improve the response speed of building emergency management. In the aspect of personnel positioning visualization, the real-time display of the spatial position and related information of personnel in the building can display the personnel activity track in real time, and the nearby monitoring video can be called to check the actual scene. In addition, the personnel distribution in the park and the information whether the personnel stay overtime can be displayed, so as to meet the management needs of epidemic prevention and control and specific office site security and secrecy.

[0003] Although the data processing of building energy consumption, personnel and equipment is highly realized at present, the internal energy consumption management of the building has not been substantially solved, especially for office buildings, apartments and residential locations using central air conditioning systems, which still use traditional extensive ventilation systems, and cannot intelligently adjust the ventilation mode of each ventilation area, causing the compressor group to run at high load for a long time, high energy consumption and serious energy waste. SUMMARY

[0004] In view of the technical problems of the traditional extensive ventilation system, the compressor group running at high load for a long time, high energy consumption and serious energy waste, the present application provides a central air conditioner intelligent control system and method for intelligent buildings.

[0005] The present application realizes the above-mentioned purposes through the following technical solutions:

[0006] The application provides a central air conditioner intelligent control system of an intelligent building, which comprises a compressor group, a plurality of ventilation areas connected with the compressor group through air pipes, a regional control end arranged in the ventilation area, a user end and a centralized control end in communication connection with the regional control end, the user end in communication connection with the centralized control end, the centralized control end in communication connection with a compressor group control end, and the compressor group control end in electrical connection with the compressor group.

[0007] Preferably, the regional control end comprises a DSP logic controller in electrical connection with a regional monitoring unit, a power management unit, a communication unit and a storage unit, and the regional monitoring unit is uniformly arranged in the ventilation area to monitor the state change in the ventilation area.

[0008] Preferably, the regional monitoring unit comprises a human body infrared detector and a second temperature sensor arranged in the ventilation area to monitor the personnel change state and the temperature change in the ventilation area, respectively.

[0009] Preferably, the communication unit comprises an RS485 communication interface in communication connection with the centralized control end through an RS485 communication bus and a wireless communication module in communication connection with the user end, and the power management unit comprises a power converter, a storage battery and a power switch, the power converter is in electrical connection with an external power supply, and the power converter and the storage battery are in electrical connection with the DSP logic controller through the power switch.

[0010] Preferably, the centralized control end comprises a centralized control management host in electrical connection with a server, an RS485 communication interface, a first temperature sensor and an alarm, the first temperature sensor is arranged outdoors to monitor the outdoor temperature change, the server is in electrical connection with a 4G short message alarm module in communication connection with the user end, and the compressor group control end comprises a PWM frequency conversion controller in electrical connection with the compressor group.

[0011] Preferably, the number of the primary air ducts is two groups, both of which are communicated with the main air duct, and each of which is communicated with two groups of the secondary air ducts; the two groups of the primary air ducts and the main air duct are Y-shaped as a whole, the main air duct regulator is arranged at the joint position of the main air duct and the primary air duct, and the two groups of the secondary air ducts and the corresponding primary air ducts are Y-shaped as a whole, and the branch air duct regulator is arranged at the joint position of the primary air duct and the secondary air duct.

[0012] Preferably, the main air duct regulator and the branch air duct regulator both include an FPGA controller, a servo motor, an RS485 communication interface, a power supply interface and an enclosure, the joint positions of the main air duct and the primary air duct and the primary air duct and the secondary air duct are movably provided with the enclosure, one end of the enclosure is connected with the servo motor through a rotating shaft, a rotary encoder is arranged on the output shaft of the servo motor, the other end of the enclosure is provided with a first suction member, triangular limiting grooves are respectively arranged on both sides of the main air duct, a second suction member matched with the first suction member is embedded in the triangular limiting groove, and the servo motor, the RS485 communication interface, the power supply interface, the rotary encoder and the second suction member are electrically connected with the FPGA controller.

[0013] Preferably, the first suction member includes a positioning magnetic sheet arranged on the side of the enclosure, the second suction member includes an electromagnet embedded in the triangular limiting groove, and when the enclosure is rotated to the triangular limiting groove according to a set rotation angle, the electromagnet is attracted to the positioning magnetic sheet, and the electromagnet is electrically connected with the FPGA controller; an anemometer is arranged in the primary air duct and the secondary air duct, and the anemometer is electrically connected with the FPGA controller through a URAT communication interface.

[0014] Preferably, the number of the primary air ducts is three groups, the three groups of the primary air ducts are communicated with the main air duct, each group of the primary air ducts is communicated with two groups of the secondary air ducts, a main air duct regulator is arranged between the main air duct and the three groups of the primary air ducts, the main air duct regulator comprises an FPGA controller and two groups of sealing plates, the two groups of the sealing plates are symmetrically arranged at the intersection position between the main air duct and the primary air duct, and the two groups of the sealing plates are matched with the two side walls of the main air duct respectively, so as to regulate the air inlet state of the two groups of the primary air ducts close to the two sides of the main air duct, a positioning column is arranged in the main air duct, the positioning column is matched with the two groups of the sealing plates, so as to regulate the air inlet state of the primary air duct vertically communicated with the main air duct, the two groups of the sealing plates are connected with servo motors through rotating shafts respectively, a rotary encoder is arranged on the output shaft of the servo motor, the servo motor and the rotary encoder are electrically connected with the FPGA controller, and the FPGA controller is in communication connection with the centralized control end.

[0015] The application further discloses a central air conditioner intelligent control method of an intelligent building.

[0016] S1, first, divide the whole area into several ventilation areas, and name each ventilation area, determine corresponding air duct pipeline information communicated with the ventilation area according to the ventilation area partition information and the air duct distribution information, and mark the ventilation area and the corresponding air duct;

[0017] S2, according to the personnel change state of the ventilation area, when running in the daytime, determine the ventilation mode of the ventilation area as an energy-saving mode or an intelligent mode, when no personnel appears in the ventilation area for more than a set time, switch the ventilation mode of the ventilation area to the energy-saving mode, start the energy-saving mode, and close the air duct corresponding to the ventilation area; when personnel is detected in the ventilation area, switch the ventilation mode of the ventilation area to the intelligent mode, start the intelligent mode, open the air duct corresponding to the ventilation area, close the air duct in the energy-saving mode at the same time, adjust the number of compressor groups to be put into operation, and quickly ventilate in the ventilation area, so that the temperature in the ventilation area quickly reaches a set temperature value;

[0018] S3, according to the ventilation mode of each ventilation area, close the air duct corresponding to the ventilation area in the energy-saving mode, according to the temperature difference change speed of the ventilation area in the intelligent mode, determine the ventilation area with the largest temperature difference as an optimal level ventilation area, and the ventilation areas with the temperature difference as general level ventilation areas, at this time, the opening angle of the air inlet of the air duct corresponding to the general level ventilation area is reduced, the opening angle of the air inlet of the air duct corresponding to the optimal level ventilation area is fully opened, and according to the rated ventilation quantity of each ventilation area, the ventilation quantity required by the ventilation area in the intelligent mode is determined, and the number of compressor groups to be put into operation is adjusted;

[0019] S4、According to step S3, when the ventilation area temperature reaches the set temperature in the intelligent mode state, the ventilation area is adjusted to be a to-be-enabled ventilation area, and steps S2-S3 are repeated.

[0020] S5、In the night operation, the intelligent mode is exited, the ventilation area ventilation mode is switched to the night mode, the temperature in the ventilation area and the outdoor temperature are combined, when the ventilation area and the outdoor temperature difference is greater than the set threshold, the ventilation area air volume is adjusted by adjusting the ventilation area corresponding air duct inlet opening angle and / or the compressor group input quantity.

[0021] Compared with the prior art, the present application has the beneficial effects that:

[0022] 1、The present application can close the corresponding air duct or adjust the corresponding air duct inlet opening size according to the ventilation mode of each ventilation area by arranging the main air duct adjuster and the branch air duct adjuster between the main air duct and the first-level air duct and between the first-level air duct and the second-level air duct, thereby completing the overall air duct ventilation adjustment, determining the required ventilation volume according to the ventilation mode of each ventilation area, reducing the number of compressors in operation, and achieving energy saving and consumption reduction, and changing the traditional extensive ventilation mode.

[0023] 2、The present application can calculate the current air duct ventilation volume by the anemometer arranged in the first-level air duct and the second-level air duct combined with the cross-sectional area of the air duct, and adjust the air duct wind speed by controlling the opening size of the corresponding air duct inlet according to the required ventilation volume of the ventilation area, thereby realizing intelligent and efficient ventilation of the ventilation area.

[0024] 3、The main air duct adjuster and the branch air duct adjuster of the present application each include a servo motor driving a sealing plate to rotate, a rotary encoder is used to monitor the rotation angle of the servo motor, thereby realizing accurate control of the turning angle of the sealing plate, and electromagnets are arranged on the two side walls of the main air duct, when the sealing plate rotates to the two side walls of the main air duct, the electromagnets attract and fix the sealing plate on the side walls of the main air duct, avoiding the sealing plate from swinging due to air impact and affecting normal ventilation.

[0025] 4、The present application opens a triangular limiting groove on each side wall of the main air duct, the triangular limiting groove forms a limiting step, the limiting step is used to stably support and limit the end of the sealing plate, and avoids the sealing plate from being stuck in the first-level air duct due to air impact in the air duct, thereby ensuring normal ventilation of the air duct.

[0026] 5、The present application realizes all-weather 24h energy-saving operation by the energy-saving mode, the intelligent mode and the night mode, meets the intelligent ventilation demand of different stages and different areas, and greatly reduces the energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative labor.

[0028] Figure 1 is the overall working principle architecture diagram of the present application.

[0029] Figure 2 is the working principle diagram of the centralized control end in the present application.

[0030] Figure 3 is the working principle diagram of the regional control end in the present application.

[0031] Figure 4 is the working principle diagram of the main air duct regulator in the present application.

[0032] Figure 5 is the arrangement schematic diagram of the main air duct regulator in the present application Figure I .

[0033] Figure 6 is the arrangement schematic diagram of the main air duct regulator in the present application Figure II .

[0034] Figure 7 is the structural schematic diagram of the sealing plate in the present application.

[0035] Figure 8 is the overall working flow diagram of the present application.

[0036] The following is the explanation of the reference signs:

[0037] 1 is the main air duct, 2 is the first-level air duct, 3 is the sealing plate, 4 is the air speed meter, 5 is the triangular limiting groove, 6 is the positioning magnetic sheet, and 7 is the positioning column. DETAILED DESCRIPTION

[0038] The following will be further explained the technical solutions of the present application in combination with the accompanying Figures 1-8 , drawings:

[0039] Embodiment one

[0040] For example Figures 1-7The application discloses a central air conditioner intelligent control system of an intelligent building, which comprises a compressor group, the compressor group is communicated with a plurality of ventilation areas through air ducts, a regional control terminal is arranged in the ventilation area, the regional control terminal is respectively communicated with a user terminal and a centralized control terminal, the user terminal is communicated with the centralized control terminal, the centralized control terminal is communicated with a compressor group control terminal, and the compressor group control terminal is electrically connected with the compressor group.

[0041] Specifically, the regional control terminal comprises a DSP logic controller, the DSP logic controller is electrically connected with a regional monitoring unit, a power management unit, a communication unit and a memory unit, and the regional monitoring unit is uniformly arranged in the ventilation area and used for monitoring the state change in the ventilation area. That is to say, one regional control terminal is arranged in each ventilation area, and the regional monitoring unit is arranged in each ventilation area and used for monitoring the environmental state change in the area and whether people appear, and the regional monitoring information is transmitted to the centralized control terminal in real time through the communication unit, so that the remote control center can realize real-time sensing of the state change in the ventilation area.

[0042] Specifically, the regional monitoring unit comprises a human body infrared detector and a second temperature sensor, the human body infrared detector and the second temperature sensor are arranged in the ventilation area and used for monitoring the state change of people in the ventilation area and the temperature change in the ventilation area respectively. That is to say, the human body infrared detector and the second temperature sensor are arranged in the ventilation area, the human body infrared detector is used for detecting the flow of people in the ventilation area in real time, when no people appear in the ventilation area within a set time, the ventilation area can enter an energy-saving mode, and the second temperature sensor is used for monitoring the temperature change in the ventilation area in real time, in the intelligent mode state, the air duct can be controlled to pass the set air volume into the ventilation area to meet the temperature adjustment demand by setting the temperature of the ventilation area.

[0043] Optionally, the communication unit comprises an RS485 communication interface and a wireless communication module, the RS485 communication interface is in communication connection with the central control end through an RS485 communication bus, and the wireless communication module is in communication connection with the user end; the power management unit comprises a power converter, a storage battery and a power switch, the power converter is electrically connected with an external power supply, and the power converter and the storage battery are both electrically connected with the DSP logic controller through the power switch. That is, the area control end can be in communication connection with the central control end through the RS485 communication interface and the RS485 communication bus, and in communication connection with the user end by using the wireless communication module, so that the area control end can transmit the monitoring information in the area to the central control end in real time, and at the same time, in order to ensure stable and efficient communication of the user end, the user end can send a temperature adjusting instruction to the area control end to set the temperature in the ventilation area, and the area control end can feed back the received temperature instruction to the central control end, so that the temperature in the ventilation area can be adjusted, and at the same time, when the ventilation area mode is switched, the central control end can send the monitoring information in the ventilation area to the user end in the form of a short message, so that the user can easily understand the change of the ventilation mode of the ventilation area.

[0044] Specifically, the central control end comprises a central control management host, the central control management host is electrically connected with a server, an RS485 communication interface, a first temperature sensor and an alarm, the first temperature sensor is arranged outdoors to monitor outdoor temperature changes, the server is electrically connected with a 4G short message alarm module, the 4G short message alarm module is in communication connection with the user end, and the compressor group control end comprises a PWM frequency conversion controller, and the PWM frequency conversion controller is electrically connected with the compressor group. That is, the first temperature sensor is used to monitor the outdoor temperature changes in real time, and at the same time, the first temperature sensor transmits the acquired outdoor temperature parameters to the central control management host, when the ventilation area enters the night operation mode, the outdoor temperature acquired by the first temperature sensor is compared with the indoor temperature in the ventilation area, when the temperature difference is too large, the ventilation volume of the ventilation area is adjusted to reduce the temperature difference, and at the same time, the central control management host uploads the acquired parameters to the server, and the server can send a reminder short message to the user end.

[0045] Specifically, the air pipe comprises a main air duct 1, a plurality of first air ducts 2 and second air ducts, the main air duct 1 is in communication with the compressor group, the main air duct 1 is in communication with a plurality of the first air ducts 2, and a main air duct regulator for regulating the first air duct inlet state is arranged between the main air duct 1 and the first air duct 2, the first air duct 1 is in communication with the second air duct, and a branch air duct regulator for regulating the second air duct inlet state is arranged between the first air duct 1 and the second air duct, and the main air duct regulator and the branch air duct regulator are respectively in communication connection with the control end. That is, the air pipe is composed of a main air duct 1, a first air duct 2 and a second air duct, the main air duct 1 is in communication with the compressor group for communication with an external air source, the number of main air ducts 1 arranged in the embodiment of the application is one group, one group of main air ducts 1 is respectively in communication with the first air duct 2, and a main air duct regulator is arranged in the main air duct 1 and the first air duct 2, which can regulate the inlet state of the first air duct, and a branch air duct regulator is arranged between the first air duct 2 and the second air duct, which controls the inlet state of the second air duct, and then the ventilation priority of the ventilation area is determined according to the ventilation mode of each ventilation area, the inlet state of the corresponding air duct is adjusted, and efficient and energy-saving ventilation of the whole ventilation area is realized.

[0046] Optionally, the number of the first air ducts 2 is two groups, both groups of the first air ducts 2 are in communication with the main air duct 1, and each group of the first air ducts 2 is in communication with two groups of the second air ducts; the two groups of the first air ducts 2 and the main air duct 1 form a Y shape as a whole, the main air duct regulator is arranged at the intersection position of the main air duct 1 and the first air duct 2, and the two groups of the second air ducts and the corresponding first air ducts 2 form a Y shape as a whole, and the branch air duct regulator is arranged at the intersection position of the first air duct 2 and the second air duct. That is, the number of the first air ducts 2 in the embodiment of the application is two groups, the two groups of first air ducts 2 are in communication with the main air duct 1 to form a Y shape, and the first air ducts 2 are also in communication with the second air ducts to form a Y shape, the main air duct regulator and the branch air duct regulator are arranged at the intersection positions of the main air duct 1 and the first air duct 2 and the first air duct 2 and the second air duct respectively, the inlet state of the first air duct and the second air duct is regulated by the main air duct regulator and the branch air duct regulator respectively, and then efficient switching of the ventilation mode of the ventilation area can be realized, the running power consumption of the compressor can be effectively reduced, and energy loss can be reduced.

[0047] Specifically, the main air duct regulator and the branch air duct regulator each comprise an FPGA controller, a servo motor, an RS485 communication interface, a power supply interface and a sealing plate 3, the intersection of the main air duct 1 and the first-level air duct 2 and the intersection of the first-level air duct 2 and the second-level air duct are each movably provided with a sealing plate 3, one end of the sealing plate is connected with the servo motor through a rotating shaft, a rotary encoder is arranged on the output shaft of the servo motor, the other end of the sealing plate 3 is provided with a first suction member, triangular limiting grooves 5 are respectively formed in the two sides of the main air duct 1, second suction members matched with the first suction members are embedded in the triangular limiting grooves 5, and the servo motor, the RS485 communication interface, the power supply interface, the rotary encoder and the second suction members are electrically connected with the FPGA controller. That is to say, the sealing plate 3 is movably arranged between the main air duct 1 and the first-level air duct 2 and between the first-level air duct 2 and the second-level air duct, the rotating shaft is arranged on the sealing plate 3, the sealing plate 3 is located in the main air duct 1, and the area of the sealing plate 3 is slightly smaller than the area of the main air duct 1, so that the sealing plate 3 can be quickly rotated, the two ends of the rotating shaft are respectively outwardly penetrated from the air duct, one end of the penetrating part is movably arranged on a rotating seat, the other end of the penetrating part is connected with a speed reducer through a shaft coupling, a rotary encoder is arranged on the output shaft of the speed reducer, the rotating angle is monitored by using the angle rotary encoder, so that the sealing plate can be accurately rotated, and the suction members are arranged on the side surface of the sealing plate, which can help the sealing plate to be stably sucked to the side wall of the air duct after being turned to the position, so as to avoid the influence of the air impact on the stability of the sealing plate.

[0048] It should be noted that the triangular limiting grooves 5 are respectively formed in the two side walls of the main air duct 1, the triangular limiting grooves 5 form a limiting step, the end of the sealing plate is stably supported and limited by the limiting step, and the sealing plate is prevented from being impacted by the air in the air duct and stuck in the first-level air duct or the second-level air duct, so as to ensure the normal rotation of the sealing plate and the regulation of the air duct ventilation.

[0049] Optionally, the first suction member comprises a positioning magnetic sheet 6, the positioning magnetic sheet 6 is arranged on the side surface of the sealing plate 3, the second suction member comprises an electromagnet, the electromagnet is embedded in the triangular limiting groove 5, and when the sealing plate 3 is rotated to the triangular limiting groove 5 according to the set rotating angle, the electromagnet is attracted to the positioning magnetic sheet 6, and the electromagnet is electrically connected with the FPGA controller. That is to say, the positioning magnetic sheet is arranged on the side surface of the sealing plate, the electromagnet is arranged on the side wall of the air duct, when the rotating angle of the speed reducer reaches the set value, the FPGA controller controls the electromagnet to be electrified, so that the electromagnet and the positioning magnetic sheet are attracted to each other, the end of the sealing plate is fixed in the triangular limiting groove, on the one hand, the sealing plate is prevented from being impacted by the wind and shaken to be broken, and on the other hand, the sealing plate is prevented from being impacted by the wind and entering the first-level air duct or the second-level air duct and being stuck in the first-level air duct or the second-level air duct.

[0050] Optionally, the primary air duct 2 and the secondary air duct are provided with an anemometer 4, and the anemometer 4 is electrically connected with the FPGA controller through a URAT communication interface. That is, the anemometer is arranged in the primary air duct and the secondary air duct respectively, and the anemometer is used to monitor the change of the air speed in each air duct in real time, so that the opening size of the air inlet of each air duct can be adjusted according to the required air volume of the ventilation area, and efficient ventilation can be realized.

[0051] Optionally, the primary air duct 2 is provided in three groups, and the three groups of primary air ducts 2 are connected with the main air duct. Each group of primary air ducts 2 is connected with two groups of secondary air ducts. The main air duct 1 and the three groups of primary air ducts 2 are provided with a main air duct regulator. The main air duct regulator includes an FPGA controller and two groups of sealing plates 3. The two groups of sealing plates 3 are movably and symmetrically arranged at the joint position between the main air duct 1 and the primary air duct 2, and the two groups of sealing plates 3 are matched with the two side walls of the main air duct 1 respectively, so as to adjust the air inlet state of the two groups of primary air ducts 2 close to the two sides of the main air duct 1. That is, three groups of primary air ducts 2 can also be arranged, and the three groups of primary air ducts 2 are connected with the main air duct 1. Two groups of sealing plates 3 are arranged between the main air duct 1 and the three groups of primary air ducts 2, and the air inlet state of the two groups of primary air ducts 2 located on the side can be adjusted by using the two groups of sealing plates 3.

[0052] It should be noted that each group of primary air ducts 2 can also be connected with two or three groups of secondary air ducts. When each group of primary air ducts 2 is connected with two groups of secondary air ducts, the branch air duct regulator is still arranged in the form of a single sealing plate 3. When each group of primary air ducts is connected with two groups of secondary air ducts, the branch air duct regulator is arranged in the form of a double sealing plate 3 in the embodiment of the application.

[0053] Specifically, the main air duct 1 is provided with a positioning column 7, and the positioning column 7 is matched with the two groups of sealing plates, so as to adjust the air inlet state of the primary air duct 2 connected with the main air duct 1 vertically. The two groups of sealing plates 3 are connected with servo motors through rotating shafts respectively, the output shaft of the servo motor is provided with a rotary encoder, and the servo motor and the rotary encoder are electrically connected with the FPGA controller. The FPGA controller is in communication connection with the centralized control end. That is, the main air duct 1 is provided with a positioning column 7, and grooves for accommodating the end portions of the sealing plates 3 are formed on the two sides of the positioning column 7. When it is necessary to adjust the primary air duct 2 connected with the main air duct 1 vertically, the double sealing plates 3 are controlled to rotate synchronously, the double sealing plates 3 are abutted against the positioning column 7, and the air inlet of the primary air duct 2 is adjusted. It should be noted that the electromagnet and the positioning magnetic sheet are also arranged in the grooves and on the sealing plates in the embodiment of the application, so that the double sealing plates can be stably abutted against the positioning column, and the sealing plates can be prevented from swinging due to the influence of wind.

[0054] Embodiment two

[0055] As Figure 8 shown, the application also discloses a central air conditioning intelligent control method of an intelligent building, comprising the following steps:

[0056] S1, first divide the entire area into several ventilation zones, and name each ventilation zone, determine the corresponding air duct pipeline information communicated with the ventilation zone according to the ventilation zone partition information combined with the air duct distribution information, and mark the association of the ventilation zone and the corresponding air duct; that is, first divide the area in the building into several ventilation zones, and name each ventilation zone, for example, Q1, Q2, Q3,..., Qn, then determine the corresponding communicated air duct according to the ventilation zone, for example, air duct L1, L2, L3, L4,..., Ln, mark the association of the ventilation zone and the corresponding communicated air duct, so as to directly retrieve the corresponding air duct for subsequent control of the opening state of the corresponding air duct inlet.

[0057] S2, according to the personnel change state of the ventilation zone, when running in the daytime, determine the ventilation mode of the ventilation zone as energy-saving mode or intelligent mode, when no personnel appears in the ventilation zone for a set time, the ventilation mode of the ventilation zone is switched to energy-saving mode, the energy-saving mode is opened, and the air duct corresponding to the ventilation zone is closed; when personnel appear in the ventilation zone, the ventilation mode of the ventilation zone is switched to intelligent mode, the intelligent mode is opened, the air duct corresponding to the ventilation zone is opened, and the air duct in the energy-saving mode state is closed at the same time, the number of compressor groups put into operation is adjusted, the ventilation zone is rapidly ventilated, and the temperature in the ventilation zone is quickly reached to the set temperature value. That is, the personnel flow in the detection area is detected by using the human body infrared detector in the ventilation zone, when no personnel flow is detected within a set time, the ventilation mode of the ventilation zone is adjusted to energy-saving mode by the control end, that is, the air duct corresponding to the ventilation zone is closed; when personnel appear in the ventilation zone, the ventilation mode of the ventilation zone is adjusted to intelligent mode by the control end, the air duct corresponding to the ventilation zone is opened, and the rated required ventilation quantity is calculated according to the ventilation mode of each ventilation zone and the preset standard ventilation quantity in the intelligent mode, the ventilation quantity generated by the current compressor group operation power is compared with the rated ventilation quantity, when the rated ventilation quantity is less than the ventilation quantity generated by the current compressor operation power, the compressor group operation power is adjusted or the number of compressor groups put into operation is reduced, and then the energy-saving and consumption-reducing requirement is completed.

[0058] S3, according to the ventilation mode of each ventilation area, the air duct corresponding to the ventilation area in the energy-saving mode is closed, according to the temperature difference change speed in the ventilation area in the intelligent mode, the ventilation area with the maximum temperature difference is determined as the optimal level ventilation area, and the remaining ventilation areas with temperature difference are the general level ventilation areas, at this time, the opening angle of the air inlet of the air duct corresponding to the general level ventilation area is reduced, the opening angle of the air inlet of the air duct corresponding to the optimal level ventilation area is fully opened, and the required ventilation quantity of the ventilation area in the intelligent mode is determined according to the rated ventilation quantity of each ventilation area, and the number of compressors put into operation is adjusted. That is, according to the ventilation area in the intelligent mode of each ventilation mode, the temperature difference between the current ventilation area temperature and the preset temperature is determined, the ventilation area with the maximum temperature difference is determined as the optimal level ventilation area according to the temperature difference between each ventilation area, the remaining ventilation areas with temperature difference are the general level ventilation areas, then the air inlet of the air duct of the general level ventilation area is controlled by the control end, the air inlet of the air duct of the optimal level ventilation area is fully opened, and the ventilation area with the maximum temperature difference is quickly adjusted in the premise of ensuring that the operating power of the current compressor is unchanged.

[0059] S4, according to step S3, when the temperature of the ventilation area in the intelligent mode reaches the set temperature, the ventilation area is adjusted to the standby ventilation area, and steps S2-S3 are repeated. That is, when the temperature in the ventilation area reaches the preset temperature, the ventilation area is adjusted to the standby ventilation area, at this time, the opening angle of the air inlet of the air duct corresponding to the ventilation area is between 30°-45°, and the low threshold ventilation state is maintained; according to the temperature difference change of each ventilation area, the ventilation area with the maximum temperature difference is determined as the priority level ventilation area, and the quick temperature adjustment action is performed again. It should be noted that the air inlet of the air duct corresponding to the priority level ventilation area is in a fully opened state, and the opening angle of the air inlet of the air duct corresponding to the general level ventilation area is between 60°-75°.

[0060] S5, when running at night, the intelligent mode is exited, the ventilation mode of the ventilation area is switched to the night mode, and when the temperature difference between the ventilation area and the outdoor temperature is greater than a set threshold, the ventilation quantity of the ventilation area is adjusted by adjusting the opening angle of the air inlet of the air duct corresponding to the ventilation area and / or the number of compressors put into operation. That is, when entering the night, the entire ventilation area exits the intelligent mode and enters the night mode, the temperature difference between the room temperature and the outdoor temperature in the night mode is ensured to be within a set threshold range, and the influence of the large temperature difference between indoor and outdoor at night on the living comfort is avoided.

[0061] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A central air conditioning intelligent control system for intelligent buildings, comprising a compressor group, wherein the compressor group is connected to several ventilation zones via air ducts, characterized in that, A regional control terminal is installed within the ventilation area. The regional control terminal is communicatively connected to both the user terminal and the central control terminal. The user terminal is communicatively connected to the central control terminal, which is communicatively connected to the compressor group control terminal. The compressor group control terminal is electrically connected to the compressor group. The air duct includes a main air duct, several primary air ducts, and secondary air ducts. The main air duct is connected to the compressor group and several primary air ducts. A main air duct regulator is installed between the main air duct and the primary air ducts to regulate the air intake state of the primary air ducts. A branch air duct regulator is installed between the primary air ducts and the secondary air ducts to regulate the air intake state of the secondary air ducts. The main air duct regulator and the branch air duct regulator are communicatively connected to the central control terminal. The number of primary air ducts is two sets, both sets of primary air ducts are connected to the main air duct, and each set of primary air ducts is connected to the two sets of secondary air ducts; the two sets of primary air ducts and the main air duct form a Y-shape, the main air duct regulator is set at the junction of the main air duct and the primary air duct, the two sets of secondary air ducts and the corresponding connected primary air ducts form a Y-shape, and the branch air duct regulator is set at the junction of the primary air duct and the secondary air duct; Both the main air duct regulator and the branch air duct regulator include an FPGA controller, a servo motor, an RS485 communication interface, a power interface, and a sealing plate. Sealing plates are movably installed at the junctions of the main air duct and the primary air duct, and at the junctions of the primary air duct and the secondary air duct. One end of each sealing plate is connected to the servo motor via a rotating shaft. A rotary encoder is installed on the output shaft of the servo motor. A first suction member is installed at the other end of the sealing plate. Triangular limiting grooves are respectively opened on both sides of the main air duct. A second suction member, which cooperates with the first suction member, is embedded in the triangular limiting groove. The servo motor, the RS485 communication interface, the power interface, the rotary encoder, and the second suction member are all electrically connected to the FPGA controller.

2. The intelligent control system for central air conditioning in intelligent buildings as described in claim 1, characterized in that, The area control terminal includes a DSP logic controller, which is electrically connected to an area monitoring unit, a power management unit, a communication unit, and a storage unit. The area monitoring units are evenly distributed within the ventilation area to monitor changes in the ventilation area's status.

3. The intelligent control system for central air conditioning in intelligent buildings as described in claim 2, characterized in that, The area monitoring unit includes a human infrared detector and a second temperature sensor, which are respectively arranged in the ventilation area to monitor changes in the status of people in the ventilation area and changes in temperature in the ventilation area.

4. The intelligent control system for central air conditioning in intelligent buildings as described in claim 2, characterized in that, The communication unit includes an RS485 communication interface and a wireless communication module. The RS485 communication interface is connected to the central control terminal via an RS485 communication bus, and the wireless communication module is connected to the user terminal. The power management unit includes a power converter, a battery, and a power switching switch. The power converter is electrically connected to an external power source, and both the power converter and the battery are electrically connected to the DSP logic controller via the power switching switch.

5. The intelligent control system for central air conditioning in intelligent buildings as described in claim 1 or 4, characterized in that, The centralized control terminal includes a centralized control management host, which is electrically connected to a server, an RS485 communication interface, a first temperature sensor, and an alarm. The first temperature sensor is installed outdoors to monitor changes in outdoor temperature. The server is electrically connected to a 4G SMS alarm module, which is communicatively connected to the user terminal. The compressor group control terminal includes a PWM inverter controller, which is electrically connected to the compressor group.

6. The intelligent control system for central air conditioning in intelligent buildings as described in claim 1, characterized in that, The first attracting component includes a positioning magnetic sheet disposed on the side of the sealing plate. The second attracting component includes an electromagnet embedded in the triangular limiting groove. When the sealing plate rotates to contact the triangular limiting groove according to a set rotation angle, the electromagnet attracts the positioning magnetic sheet. The electromagnet is electrically connected to the FPGA controller. Anemometers are installed in both the primary air duct and the secondary air duct. The anemometers are electrically connected to the FPGA controller through a URAT communication interface.

7. The intelligent control system for central air conditioning in intelligent buildings as described in claim 1, characterized in that, The primary air ducts are arranged in three sets, all of which are connected to the main air duct. Each set of primary air ducts is connected to two sets of secondary air ducts. A main air duct regulator is installed between the main air duct and the three sets of primary air ducts. The main air duct regulator includes an FPGA controller and two sets of sealing plates. The two sets of sealing plates are symmetrically arranged at the junction between the main air duct and the primary air ducts, and each set of sealing plates cooperates with the side walls of the main air duct to regulate the air intake state of the two sets of primary air ducts near the sides of the main air duct. A positioning column is installed in the main air duct. The positioning column cooperates with the two sets of sealing plates to regulate the air intake state of the primary air ducts vertically connected to the main air duct. The two sets of sealing plates are connected to a servo motor through a rotating shaft. A rotary encoder is installed on the output shaft of the servo motor. The servo motor and the rotary encoder are electrically connected to the FPGA controller, and the FPGA controller is communicatively connected to the central control terminal.

8. A control method for a central air conditioning intelligent system in an intelligent building as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. First, divide the entire area into several ventilation zones and name each zone. Based on the zone information and the distribution information of each duct, determine the corresponding duct information connected to the ventilation zone and associate the ventilation zone with the corresponding duct. S2. Based on the personnel status in the ventilation zone, during daytime operation, determine whether the ventilation mode is energy-saving or intelligent. If no personnel appear in the ventilation zone for a set time, switch the ventilation mode to energy-saving mode, activate energy-saving mode, and close the corresponding duct. When personnel are detected in the ventilation zone, switch the ventilation mode to intelligent mode, activate intelligent mode, open the corresponding duct, and simultaneously close the duct in energy-saving mode. Adjust the number of compressors in operation to rapidly ventilate the ventilation zone, allowing the temperature to quickly reach the set temperature value. S3. Based on the ventilation mode of each ventilation zone, close the air ducts corresponding to the ventilation zones in energy-saving mode. Based on the rate of temperature change within the ventilation zones in intelligent mode, determine the ventilation zone with the largest temperature difference as the optimal ventilation zone, and the remaining ventilation zones with temperature differences as general ventilation zones. At this time, reduce the opening angle of the air inlet corresponding to the general ventilation zone, and fully open the opening angle of the air inlet corresponding to the optimal ventilation zone. Simultaneously, based on the rated ventilation volume of each ventilation zone, determine the required ventilation volume of the ventilation zone in intelligent mode and adjust the number of compressors in operation. S4. According to step S3, when the temperature of the ventilation zone in intelligent mode reaches the set temperature, adjust the ventilation zone to a ventilation zone to be activated, and repeat steps S2-S3. S5. During nighttime operation, exit intelligent mode and switch the ventilation mode of the ventilation zone to night mode. Combining the temperature inside the ventilation zone with the outdoor temperature, when the temperature difference between the ventilation zone and the outdoor temperature exceeds the set threshold, adjust the air volume entering the ventilation zone by adjusting the opening angle of the air inlet corresponding to the ventilation zone and / or the number of compressors in operation.

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