CN214499375U

CN214499375U - Air compressor controller circuit

Info

Publication number: CN214499375U
Application number: CN202120550870.1U
Authority: CN
Inventors: 万利芳; 吕江河; 蓝庆敏
Original assignee: Wuyou Industrial Control Technology Guangzhou Co ltd
Current assignee: Wuyou Industrial Control Technology Guangzhou Co ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-10-26
Anticipated expiration: 2031-03-17

Abstract

The utility model discloses an air compressor controller circuit, including the CPU treater, the output module circuit, the input module circuit, 485 communication circuit and power module circuit, the CPU treater adopts STM32 treater, be connected with the ULN2003AFWG driver chip that the output module circuit was equipped with on the pin of CPU treater, the input module circuit who connects on the pin of CPU treater is CT input circuit, 485 communication circuit connects on the CPU treater through the isolation chip that is equipped with, the power module circuit passes through the power interface that step-down chip connected CPU treater, still be connected with FR fan fault indication area on the CPU treater, display and function set up the panel; the utility model discloses an air compressor machine controller circuit passes through pressure sensor real-time detection and contrast air feed pressure and the size of uninstallation pressure, realizes the automatic control of air compressor machine, automatic work and restart.

Description

Air compressor controller circuit

Technical Field

The utility model relates to a circuit design technical field, concretely relates to air compressor machine controller circuit.

Background

The air compressor controller is provided with a standard type sub-control unit and a variable frequency sub-control unit, advanced predictive control, time interval learning, an expert system and the like are written into a control algorithm through networking and variable frequency control on the premise of ensuring the lowest air supply pressure according to air compressor group configuration information, optimized control is realized, the output pressure of the system is controlled in the minimum fluctuation range, and the energy consumption of the air compressor group and the dryer group in operation is minimized. The existing air compressor controller cannot self-check the air supply pressure and the unloading pressure, further cannot realize automatic operation of the air compressor, cannot automatically restart after shutdown, affects working efficiency, and has the problems of insufficient air pressure or excessive air pressure, and causes the use of the air compressor. Therefore, an air compressor controller circuit is manufactured to solve the problem that the existing air compressor cannot be self-checked.

Disclosure of Invention

To the problem that exists among the prior art, the utility model aims to provide an air compressor machine controller circuit.

The utility model provides a technical scheme that its technical problem adopted is: a kind of air compressor controller circuit, including CPU processor, output module circuit, input module circuit, 485 communication circuit and power module circuit, the said CPU processor adopts STM32 processor, connect with ULN2003AFWG driver chip that the output module circuit has on the base pin of the CPU processor, the input module circuit that connects on the base pin of the CPU processor is CT input circuit, 485 communication circuit connects on CPU processor through the isolating chip equipped with, the power module circuit connects the power interface of CPU processor through the step-down chip, still connect with FR blower fault indication area, display and function and set up the panel on the CPU processor;

the output module circuit is connected with 5 groups of relays through an ULN2003AFWG driving chip, one end of each relay is connected to a public end, one output end of each relay is connected with a three-phase 380V contactor, each contactor is respectively connected with a main control unit, a loading control unit, a heat tracing rod control unit, a fan control unit and a C2 unit, and the other output end of each relay is reserved;

the CT input circuit is connected with an external current transformer and used for collecting current signals of a phase line by the current transformer, and the current signals are connected with the LM2902-SR operational amplifier chip.

Preferably, a pin of the CPU processor is connected with a temperature switch, an air filtering unit, an oil filtering unit and an oil separating unit, and the pin of the CPU processor is also connected with a plurality of temperature acquisition units and 4-20MA pressure sensors.

Preferably, the 485 communication circuit is connected with an anti-explosion cap, a TVS surge protection circuit and a common mode inductance circuit in front of the isolation chip.

Preferably, the isolation chip adopts an ISO3082DWR chip for protecting and isolating communication signals.

Preferably, the 220V power module is subjected to voltage reduction by a voltage reduction chip arranged IN the power module circuit and then outputs direct currents EX _ DC24V and IN _ DC5V respectively, EX _ DC24V is connected with a 4-20MA pressure sensor circuit and an IO circuit for power supply, EX _ DC24V is further connected with a TPS5430DDA chip to obtain EX _ DC5V, EX _ DC5V is connected with an isolation chip and 5 groups of relays for power supply, EX _ DC5V is connected with power chips AMS1117-3.3 to obtain a 3.3V power supply, and the 3.3V power supply is connected with a C8051F350-GQR chip and an ADUM1201ARZ-RL7 for power supply.

Preferably, the IN _ DC5V gets IN _ DC3.3V _ MAIN and IN _ DC3.3V _ MAIN through CN302 chip to connect to the power interface of CPU process.

The utility model discloses following beneficial effect has:

the utility model discloses an air compressor machine controller circuit passes through pressure sensor real-time detection and contrast air feed pressure and the size of uninstallation pressure, realizes the automatic control of air compressor machine, automatic work and restart.

Drawings

Fig. 1 is a block diagram of a circuit of an air compressor controller.

Fig. 2 is a connection circuit diagram of the CPU processor.

Fig. 3 is a circuit diagram of the connection of the relay in the output module circuit.

Fig. 4 is a first connection circuit diagram of the CT input circuit.

Fig. 5 is a second circuit diagram of the CT input circuit.

Fig. 6 is a third circuit diagram of the CT input circuit.

Fig. 7 is a connection circuit diagram of the 485 communication circuit.

Fig. 8 is a first connection circuit diagram of the power module circuit.

Fig. 9 is a second connection circuit diagram of the power module circuit.

Fig. 10 is a third connection circuit diagram of the power module circuit.

Fig. 11 is a fourth connection circuit diagram of the power module circuit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model discloses an embodiment, refer to fig. 1-11, an air compressor machine controller circuit, including CPU treater, output module circuit, input module circuit, 485 communication circuit and power module circuit, the CPU treater adopts STM32 treater, and the model of CPU treater is STM32F103VET6, and the encapsulation is LQFP-100 CPU. The pin of the processor is connected with a ULN2003AFWG driving chip arranged on an output module circuit, the input module circuit connected with the pin of the CPU processor is a CT input circuit, a 485 communication circuit is connected with the CPU processor through an isolation chip, a power module circuit is connected with a power interface of the CPU processor through a voltage reduction chip, and the CPU processor is further connected with an FR fan fault indication area, a display and a function setting panel. The pin of the CPU processor is connected with a temperature switch, an air filter unit, an oil filter and an oil content unit, and the pin of the CPU processor is also connected with a plurality of temperature acquisition units and 4-20MA pressure sensors.

As shown in fig. 3, the output module circuit package 5 includes a relay PCJ-105D3MH, the CPU processor drives the relay switch 220V through a ULN2003AFWG driver chip by a high-low level signal, one end of the relay is connected to the common terminal, the other end of the relay is connected to a three-phase 380V contactor externally connected to the output port, the external contactor is respectively connected to the main control unit, the loading control unit, the heat tracing rod control unit, the fan control unit and the C2 unit, and the other path is a standby output for other extended outputs.

As shown in fig. 4-6, the CT input circuit respectively samples current of each phase line for three phases of 380V by an external current transformer, the sampled smaller three-phase current signals need to be compared and amplified by an LM2902-SR operational amplifier chip, and the amplified signals are sent to a main control chip for signal processing. When the CPU processor detects that the three-phase currents are inconsistent, the CPU processor outputs a corresponding instruction to turn off a relay after corresponding judgment, and because the external contactor provides a working power supply by the relay, the contactor cuts off the power supply of the equipment, and the under-current and over-current protection effects are realized.

As shown in fig. 7, the 485 communication circuit is composed of an anti-explosion cap, a TVS surge protection circuit and a common mode inductor circuit, and then the isolation chip ISO3082DWR chip, and communication signals are protected and isolated and then reach the CPU processor, so that the anti-interference capability and stability of the device are greatly improved in the signal transmission process.

As shown IN fig. 8-11, a voltage-reducing chip provided IN the power module circuit reduces the voltage of the 220V power module and outputs direct currents EX _ DC24V and IN _ DC5V, EX _ DC24V is connected to the 4-20MA pressure sensor circuit and the IO circuit for power supply, EX _ DC24V is further connected to the TPS5430DDA chip to obtain EX _ DC5V, EX _ DC5V is connected to the isolation chip and 5 sets of relays for power supply, EX _ DC5V is connected to the power chips AMS1117-3.3 to obtain a 3.3V power supply, and the 3.3V power supply is connected to the C8051F350-GQR chip and the ADUM1201ARZ-RL7 chip for power supply. Another group of IN _ DC5V gets IN _ DC3.3V _ MAIN, IN _ DC3.3V _ MAIN through CN302 chip to connect the power interface of CPU process.

The utility model discloses a work flow: and when the system detects that the air supply pressure is higher than a set unloading pressure value, the loading electromagnetic valve is powered off, and the air compressor runs in an idle state. And accumulating the time of no-load operation, performing no-load operation on the air compressor, reducing the air supply pressure, if the system detects that the pressure is lower than a set loading pressure value within the no-load delay time, electrifying a loading valve, and switching the air compressor into the loading operation, if the time of the no-load operation exceeds the set no-load delay time, electrifying an angle contactor and a main contactor, switching the air compressor into the air for a long time to stop, and after the air compressor is stopped for a long time, when the system detects that the air supply pressure is lower than the loading pressure and the air compressor is allowed to be restarted, automatically restarting the air compressor according to the starting process by a controller, and repeating the steps.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A controller circuit of an air compressor is characterized by comprising a CPU (Central processing Unit) processor, an output module circuit, an input module circuit, a 485 communication circuit and a power module circuit, wherein the CPU processor adopts an STM32 processor, a pin of the CPU processor is connected with an ULN2003AFWG driving chip arranged on the output module circuit, the input module circuit connected with the pin of the CPU processor is a CT (computed tomography) input circuit, the 485 communication circuit is connected with the CPU processor through an isolating chip, the power module circuit is connected with a power interface of the CPU processor through a voltage reduction chip, and the CPU processor is also connected with an FR (FR) fan fault indication area, a display and a function setting panel;

2. The air compressor controller circuit of claim 1, wherein a temperature switch, an air filter unit, an oil filter unit and an oil separation unit are connected to pins of the CPU processor, and a plurality of temperature acquisition units and 4-20MA pressure sensors are further connected to pins of the CPU processor.

3. The air compressor controller circuit of claim 1, wherein the 485 communication circuit is connected with an anti-detonator, a TVS surge protection circuit and a common mode inductor circuit in front of the isolation chip.

4. The air compressor controller circuit of claim 3, wherein the isolation chip is an ISO3082DWR chip for protecting and isolating communication signals.

5. The air compressor controller circuit as claimed IN claim 1, wherein the power module circuit is provided with a step-down chip for stepping down the 220V power module and outputting direct currents EX _ DC24V and IN _ DC5V, EX _ DC24V is connected to the 4-20MA pressure sensor circuit and the IO circuit for power supply, EX _ DC24V is further connected to TPS5430DDA chip for EX _ DC5V, EX _ DC5V is connected to the isolation chip and 5 sets of relays for power supply, EX _ DC5V is connected to the power chip AMS1117-3.3 for 3.3V power supply, and 3.3V power supply is connected to C8051F350-GQR chip and ADUM1201ARZ-RL7 chip for power supply.

6. The air compressor controller circuit as claimed IN claim 5, wherein the IN _ DC5V chip obtains IN _ DC3.3V _ MAIN and IN _ DC3.3V _ MAIN to connect to the power interface of the CPU.