Air handling unit data monitoring controller

Abstract

The utility model relates to an air conditioning box data monitoring controller, which is characterized in that a 12-path state monitoring module, a 2-path 4-20mA analog quantity input monitoring module and a 2-path 0-10V analog quantity input detection module are respectively connected with the input end of a main controller, and a 10-path dry contact output module and a 3-path 0-10V analog quantity output module are respectively connected with the output end of the main controller. The reference voltage module and the three RS485 communication modules are connected with the main controller in series, and the power supply circuit supplies power to the main controller and the functional modules. The air conditioning cabinet data monitoring controller can monitor the states of main switches and the running states of the components on the basis of having the function of driving relays corresponding to the components, supports input and output of analog quantity signals of various types, provides safe signal isolation, not only enriches the functionality of the controller, but also improves the reliability of the controller. And the operation safety and the service life of the equipment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of control, in particular to an air-conditioning box data monitoring controller. Background Art

[0002] The air conditioner controller is a controller that can receive various control signals of the air conditioner and drive the corresponding components to start and stop according to the control signals. The existing air conditioner controller has the following defects when processing and executing command signals:

[0003] (1) It does not have the function of monitoring the status of components corresponding to each signal;

[0004] (2) The input signal type is single and the signal input isolation protection function is not perfect;

[0005] (3) Improper matching of functional modules leads to excessive power consumption. Utility Model Content

[0006] The technical problem to be solved by the utility model is: to overcome the defects of the existing air-conditioning box controller such as the lack of status monitoring function, input signal type and imperfect isolation protection, and to provide an air-conditioning box data monitoring controller, which, on the basis of having the function of driving the corresponding relays of each component, can also perform status monitoring on the main switch status and component operating status, and support various types of analog signal input and output, while providing safe signal isolation, which not only enriches the functionality of the controller, but also improves the safety of equipment operation and service life.

[0007] The data monitoring controller of the air-conditioning box includes a main controller and functional modules connected to the main controller, the functional modules include 12-way status monitoring modules, 10-way dry contact output modules, 3-way 0-10V analog output modules, 2-way 4-20mA analog input monitoring modules, 2-way 0-10V analog input detection modules, a reference voltage module, 3-way RS485 communication modules, and a power supply circuit, wherein the 12-way status monitoring modules, 2-way 4-20mA analog input monitoring modules, and 2-way 0-10V analog input detection modules are respectively connected to the input end of the main controller, the 10-way dry contact output modules and 3-way 0-10V analog output modules are respectively connected to the output end of the main controller, the reference voltage module and the 3-way RS485 communication modules are serially connected to the main controller, and the power supply circuit supplies power to the main controller and each functional module.

[0008] Specifically, the main controller adopts a STC8H3K64S4 single chip microcomputer.

[0009] Specifically, the 12-way status monitoring modules all use PC817C optical couplers, and the 12-way status monitoring modules are connected to the IO pins of the main controller via monitoring pins IN1-IN12 in sequence.

[0010] Specifically, the 10-way dry contact output module includes a ULN2001D driver module and a HF32F-G / 024-HS relay. The 10-way dry contact output module is connected to the main controller through the input pins OUT11-OUT16 and OUT21-OUT24 of the ULN2001D driver module in sequence, and the output pins O1_1-O1_6 and O2_1-O2_4 of the ULN2001D driver module are respectively connected to the corresponding HF32F-G / 024-HS relays.

[0011] Specifically, the 3-channel 0-10V analog output module adopts the GP8101S chip, and the 3-channel 0-10V analog output module is connected to the main controller through the pins SDA1, SCL1-SDA3, and SCL3 of the GP8101S chip.

[0012] Specifically, the two 4-20mA analog input monitoring modules each include a TP5551 voltage follower, and the two 4-20mA analog input monitoring modules are connected to the ADC11 and ADC12 pins of the main controller through the output ends of the TP5551 voltage follower.

[0013] Specifically, the two 0-10V analog input detection modules each include two 30k resistors connected in series for voltage division, and the two 0-10V analog input detection modules are connected to the ADC5 and ADC8 pins of the main controller.

[0014] Specifically, the reference voltage module adopts LTL431 three-terminal adjustable shunt regulator, and the Vref output of the reference voltage module is 2.5V connected to the main controller.

[0015] Specifically, the three RS485 communication modules all use SP3485 communication chip, and the three RS485 communication modules are connected to the main controller through the TXD3\RXD3 pin group.

[0016] Specifically, the power supply circuit adopts HE24P24LRNAC-DC module.

[0017] The utility model discloses an air-conditioning box data monitoring controller, which overcomes the defects of the existing air-conditioning box controller such as lack of status monitoring function, input signal type and imperfect isolation protection. On the basis of having the function of driving the corresponding relays of each component, it can also monitor the status of each main switch status and the operating status of the components, and supports various types of analog signal input and output, while providing safe signal isolation, which not only enriches the functionality of the controller, but also improves the safety of equipment operation and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a further description of the data monitoring controller for an air conditioner box of the utility model in conjunction with the accompanying drawings:

[0019] Figure 1 This is the wireframe diagram of the logical structure and connection principle of the data monitoring controller of the air conditioner box;

[0020] Figure 2 This is the circuit diagram of the main controller of the air conditioning box data monitoring controller;

[0021] Figure 3 This is the circuit diagram of the 12-way status monitoring module (one of the ways) of the air-conditioning box data monitoring controller;

[0022] Figure 4 This is the circuit diagram of the 10-way dry contact output module (one of the ways) of the air conditioner data monitoring controller;

[0023] Figure 5 This is the circuit diagram of the 3-way 0-10V analog output module (one of the three) of the air conditioner data monitoring controller;

[0024] Figure 6 This is the circuit diagram of the 2-way 4-20mA analog input monitoring module of the air conditioning box data monitoring controller;

[0025] Figure 7 This is the circuit diagram of the 2-way 0-10V analog input detection module (one of the two) of the air-conditioning box data monitoring controller;

[0026] Figure 8 This is the circuit diagram of the reference voltage module of the air conditioning box data monitoring controller;

[0027] Fig. 9 This is the circuit diagram of the 3-way RS485 communication module (one of the three) of the air-conditioning box data monitoring controller;

[0028] Fig.10 It is a circuit diagram of the power supply circuit of the air conditioning box data monitoring controller.

[0029] In the figure:

[0030] 1- Main controller, 2- 12-way status monitoring module, 3- 10-way dry contact output module, 4- 3-way 0-10V analog output module, 5- 2-way 4-20mA analog input monitoring module, 6- 2-way 0-10V analog input detection module, 7- reference voltage module, 8- 3-way RS485 communication module, 9- power supply circuit. DETAILED DESCRIPTION

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the description of the present invention, it should be understood that the terms "left", "right", "front", "back", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0033] The technical solution of the utility model is further described below with specific embodiments, but the protection scope of the utility model is not limited to the following embodiments.

[0034] Implementation method 1: Figure 1 As shown, the air-conditioning box data monitoring controller includes a main controller 1, and functional modules connected to the main controller 1, the functional modules include a 12-way status monitoring module 2, a 10-way dry contact output module 3, a 3-way 0-10V analog output module 4, a 2-way 4-20mA analog input monitoring module 5, a 2-way 0-10V analog input detection module 6, a reference voltage module 7, a 3-way RS485 communication module 8, and a power supply circuit 9, wherein the 12-way status monitoring module 2, the 2-way 4-20mA analog input monitoring module 5, and the 2-way 0-10V analog input detection module 6 are respectively connected to the input end of the main controller 1, the 10-way dry contact output module 3 and the 3-way 0-10V analog output module 4 are respectively connected to the output end of the main controller 1, the reference voltage module 7 and the 3-way RS485 communication module 8 are serially connected to the main controller 1, and the power supply circuit 9 supplies power to the main controller 1 and each functional module.

[0035] Implementation method 2: Figures 2 to 10As shown, the main controller 1 of the air-conditioning box data monitoring controller adopts STC8H3K64S4 single-chip microcomputer. The single-chip microcomputer STC8H3K64S4 is used as a microprocessor, and its operating voltage range is 1.9-5.5V. It has a 1T ultra-high-speed 8051 core, which is about 12 times faster than the traditional 8051. At the same time, the instruction code is fully compatible with the traditional 8051. The maximum 64K bytes of FLASH program ROM memory is used to store user code, 5 16-bit timers and 4 high-speed serial ports, the baud rate clock source can be as fast as FOSC / 4, and supports 12-bit high-precision 12-channel analog-to-digital conversion, the fastest speed can reach 800K, and 800,000 ADC conversions can be performed per second. It has internal oscillators, watchdogs, low voltage detection and other functions. The 12-way status monitoring modules 2 all use PC817C optocouplers, and the 12-way status monitoring modules 2 are connected to the IO pins of the main controller 1 through the monitoring pins IN1-IN12 in turn. The 12 channels are respectively used for monitoring the pressure difference switch, antifreeze switch, fresh air valve switch state, return air valve switch state, air supply valve switch state, water valve switch state, operation state, local / automatic state, and fault alarm state. The switch is connected between the module terminals 1 and 2 or 2 and 3. When the switch is closed, the IN pin outputs a low level, and it is a high level at ordinary times. The IN pin is connected to the single-chip microcomputer pin. The single-chip microcomputer judges the respective states of the equipment by monitoring the level changes of the IO port. The 10-channel dry contact output module 3 includes a ULN2001D driver module and a HF32F-G / 024-HS relay. The 10-channel dry contact output module 3 is connected to the main controller 1 through the input pins OUT11-OUT16 and OUT21-OUT24 of the ULN2001D driver module in turn, and the output pins O1_1-O1_6 and O2_1-O2_4 of the ULN2001D driver module are respectively connected to the corresponding HF32F-G / 024-HS relays. The dry contact output module is used for relay driving, lighting driving, LED display driving, stepper motor driving and logic buffer. ULN2001D is an integrated high-voltage, high-current Darlington tube array. The module includes three independent Darlington tube drive circuits and freewheeling diodes, which can be used to drive inductive loads such as relays and stepper motors. A single Darlington tube collector can output 500mA current, and parallel Darlington tubes can achieve higher current output. The 3-way 0-10V analog output module 4 uses the GP8101S chip, and the 3-way 0-10V analog output module 4 is connected to the main controller 1 through the pins SDA1, SCL1-SDA3, and SCL3 of the GP8101S chip.Used to connect with return air valve, air supply valve, fresh air valve, frequency converter, etc. GP8101 is a PWM signal to analog signal converter, equivalent to DAC with PWM signal input and analog signal output. The chip can linearly convert PWM signals with a duty cycle of 0% to 100% into 0-5V or 0-10V analog voltages, and the output voltage accuracy is less than 1%. GP8101M can process high-frequency modulated PWM signals and be used in conjunction with high-frequency modulated APC chips to isolate analog signals. The two-way 4-20mA analog input monitoring module 5 includes a TP5551 voltage follower, and the two-way 4-20mA analog input monitoring module 5 is connected to the ADC11 and ADC12 pins of the main controller 1 through the output end of the TP5551 voltage follower. The 4-20mA analog input signal is converted to 0.4-2V through R7 and R22, and then the voltage signal is input into the ADC211 and ADC12 pins of the main controller chip with 12-bit resolution ADC conversion function through the TP5551 voltage follower. The two-way 0-10V analog input detection module 6 includes two 30k resistors connected in series for voltage division, and the two-way 0-10V analog input detection module 6 is connected to the ADC5 and ADC8 pins of the main controller 1. The 0-10V analog signal is input to the ADC5 and ADC8 pins of the main controller chip through the voltage division resistor, and ADC5 and ADC8 convert and calculate the corresponding voltage or inverter frequency, air valve opening, etc. The reference voltage module 7 adopts the LTL431 three-terminal adjustable parallel regulator, and the Vref output 2.5V of the reference voltage module 7 is connected to the main controller 1. It is used to provide a reference voltage source for the main controller. Its +5V comes from the output of the power module, and the output voltage is set to any value between Vref-about 2.5V and 36V through two external resistors, and its output impedance typical value is 0.2Ω. The three-way RS485 communication module 8 adopts the SP3485 communication chip, and the three-way RS485 communication module 8 is connected to the main controller 1 through the TXD3\RXD3 pin group. The working voltage of RS485 communication module is 3.3V, and the output end is externally connected to 5.0VTVS tube for protection. RS485 communication module has 3 channels in total, which are used to send and receive control signals. The power supply circuit 9 adopts HE24P24LRNAC-DC module. The power supply working voltage of the main controller chip and other functional chips is between 2V and 3.6. HE24P24LRN generates DC24V power supply voltage, which is converted into DC5V and DC3.3V power supply voltage by U10_XL1509 and U11_AMS1117, and cooperates with C14, C15, C16, C27, C13, C12 capacitor filtering to provide stable power supply to the main control and various functional modules. The remaining structures and components are as described in Implementation 1, and will not be repeated.

[0036] During operation: 2-channel 4-20mA analog input monitoring modules and 2-channel 0-10V analog input detection modules provide support for various types of analog signal input, 12-channel status monitoring modules monitor the status of each major switch and component operation status and provide complete isolation protection, 10-channel dry contact output modules and 3-channel 0-10V analog output modules can drive and control the air-conditioning actuators, and the reference voltage module optimizes the accuracy of signal input signal comparison and improves control quality. The main controller chip, functional modules and power supply are reasonably powered, which improves the safety and service life of the equipment.

[0037] This air-conditioning box data monitoring controller overcomes the defects of existing air-conditioning box controllers such as lack of status monitoring function, input signal type and imperfect isolation protection. On the basis of having the function of driving the corresponding relays of each component, it can also monitor the status of each main switch status and component operating status, and support various types of analog signal input and output, while providing safe signal isolation, which not only enriches the functionality of the controller, but also improves the safety of equipment operation and service life.

[0038] The above description shows the main features, basic principles, and advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments or embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, the above embodiments or embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An air conditioning box data monitoring controller, characterized in that: The invention comprises a main controller (1), and functional modules connected to the main controller (1), wherein the functional modules comprise a 12-channel status monitoring module (2), a 10-channel dry contact output module (3), a 3-channel 0-10V analog output module (4), a 2-channel 4-20mA analog input monitoring module (5), a 2-channel 0-10V analog input detection module (6), a reference voltage module (7), a 3-channel RS485 communication module (8), and a power supply circuit (9), wherein: The 12-channel state monitoring module (2), the 2-channel 4-20mA analog input monitoring module (5), and the 2-channel 0-10V analog input detection module (6) are respectively connected to the input end of the main controller (1); the 10-channel dry contact output module (3) and the 3-channel 0-10V analog output module (4) are respectively connected to the output end of the main controller (1); the reference voltage module (7) and the 3-channel RS485 communication module (8) are serially connected to the main controller (1); and the power supply circuit (9) supplies power to the main controller (1) and various functional modules.

2. The air conditioning box data monitoring controller according to claim 1 is characterized in that: The main controller (1) adopts a STC8H3K64S4 single chip microcomputer.

3. The air conditioning box data monitoring controller according to claim 1 is characterized in that: The 12-channel status monitoring modules (2) all use PC817C optical couplers, and the 12-channel status monitoring modules (2) are connected to the IO pins of the main controller (1) via monitoring pins IN1-IN12 in sequence.

4. The air conditioning box data monitoring controller according to claim 1 is characterized in that: The 10-way dry contact output module (3) comprises a ULN2001D drive module and a HF32F-G / 024-HS relay. The 10-way dry contact output module (3) is connected to the main controller (1) via the input pins OUT11-OUT16 and OUT21-OUT24 of the ULN2001D drive module in sequence, and the output pins O1_1-O1_6 and O2_1-O2_4 of the ULN2001D drive module are respectively connected to the corresponding HF32F-G / 024-HS relays.

5. The air conditioning box data monitoring controller according to claim 1 is characterized in that: The three-channel 0-10V analog output module (4) adopts the GP8101S chip, and the three-channel 0-10V analog output module (4) is connected to the main controller (1) via the pins SDA1, SCL1-SDA3, and SCL3 of the GP8101S chip.

6. The air conditioning box data monitoring controller according to claim 1 is characterized in that: The two-channel 4-20mA analog input monitoring modules (5) both include a TP5551 voltage follower, and the two-channel 4-20mA analog input monitoring modules (5) are connected to the ADC11 and ADC12 pins of the main controller (1) via the output ends of the TP5551 voltage follower.

7. The air conditioning box data monitoring controller according to claim 1 is characterized in that: The two-channel 0-10V analog quantity input detection modules (6) each comprise two 30k resistors connected in series for voltage division, and the two-channel 0-10V analog quantity input detection modules (6) are connected to the ADC5 and ADC8 pins of the main controller (1).

8. The air conditioning box data monitoring controller according to claim 1 is characterized in that: The reference voltage module (7) adopts an LTL431 three-terminal adjustable shunt regulator, and the Vref output 2.5V of the reference voltage module (7) is connected to the main controller (1).

9. The air conditioning box data monitoring controller according to claim 1 is characterized in that: The three-way RS485 communication modules (8) all use an SP3485 communication chip, and the three-way RS485 communication modules (8) are connected to the main controller (1) via a TXD3\RXD3 pin group.

10. The air conditioning box data monitoring controller according to claim 1 is characterized in that: The power supply circuit (9) adopts a HE24P24LRNAC-DC module.

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