CN219045806U

CN219045806U - Novel intelligent gateway circuit structure for integrated central air conditioner

Info

Publication number: CN219045806U
Application number: CN202223457922.4U
Authority: CN
Inventors: 张红星; 韩斌斌
Original assignee: Jiangsu Duowei Zhikong Technology Co ltd
Current assignee: Jiangsu Duowei Zhikong Technology Co ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-05-19
Anticipated expiration: 2032-12-23

Abstract

The utility model discloses a novel intelligent gateway circuit structure for an integrated central air conditioner, which comprises a logic controller with the model STM32F103RET6, wherein the pins PA2, PA3 and PA4 of the logic controller are connected with a first 485 hardware isolation circuit, the pins PB10, PB11 and PB12 are connected with a second 485 hardware isolation circuit, the pins PC10, PC11 and PA15 are connected with a third 485 hardware isolation circuit, the pins PA5 and PB7 are connected with an Ethernet data interface circuit, the pins VDDA are connected with an LDO voltage-reducing and stabilizing circuit, the pins PA2 and PA5 are connected with a digital quantity signal output drive circuit, and the output ends of the pins PC8 and the digital quantity signal output drive circuit are connected with an output digital interface. By adopting the design scheme of the utility model, the data synchronization of the gateway to the control host can be realized, and temporary management and control can be realized when the control host is down.

Description

Novel intelligent gateway circuit structure for integrated central air conditioner

Technical Field

The utility model discloses a gateway circuit structure, in particular to a novel intelligent gateway circuit structure for an integrated central air conditioner.

Background

The existing integrated central air conditioner control generally comprises the steps of setting a control host, connecting a plurality of central air conditioners to the control host respectively for control, wherein in the actual operation process, all central air conditioners are connected to the same control host, when the control host is down, all central air conditioners cannot operate in the process of completing the recovery of the control host to a normal state, and if the air conditioners are arranged in important occasions, the temperature change is overlarge and irreversible results are caused.

If each central air conditioner is configured with a control host, the control host is different from a common air conditioner panel, and functions such as timing regulation, sensing regulation and control, working condition regulation and control and the like are required to be realized, and compared with the common air conditioner panel, the cost is completely different, so that a common enterprise cannot bear the corresponding production cost.

Disclosure of Invention

The utility model aims to: the utility model aims to solve the problem that the existing integrated central air conditioner control host has no corresponding emergency measures after downtime, and the adoption of a plurality of control hosts can cause the excessive production cost.

The technical scheme is as follows: in order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a novel intelligent gateway circuit structure for integrated central air conditioning, integrated central air conditioning's host computer is connected to gateway circuit's input/output end, and integrated central air conditioning is connected to gateway circuit's output, including the model STM32F103RET 6's logic controller, logic controller's PA2, PA3 and PA4 pin connect first 485 hardware isolation circuit, PB10, PB11 and PB12 pin connect second 485 hardware isolation circuit, PC10, PC11 and PA15 pin connect third 485 hardware isolation circuit, PA5, PA6, PA7, PB5, PB6 and PB7 connect Ethernet data interface circuit, LDO buck voltage stabilizing circuit is connected to the VDDA pin, and output digital interface is connected to PA2, PA3, PA4 and PA5 pin, and PC8, PC9 pin and digital output drive circuit's output digital interface, PA8, PA9 and PA10 pin connect four-wire 422 circuit.

The integrated central air conditioner is characterized in that a plurality of 485 hardware isolation circuits are arranged, so that all the integrated central air conditioners originally controlled by the control host can be controlled in a plurality of clusters, the topology structure of the control host is simplified, the number of IP points accessed to the control host is reduced, the cost and the network complexity of the whole network architecture are reduced, and the real-time performance and the reliability of the network are improved.

By arranging the plurality of 485 hardware isolation circuits, all integrated central air conditioners controlled by an original control host are combined in a plurality of clusters, and then data interaction is carried out with a logic controller, and the control host can realize dynamic data interaction on all devices of the small cluster only by carrying out data access and data interaction on a data gateway.

Further, a standard DCDC switching power supply circuit capable of powering the logic controller is included.

Further, the three 485 hardware isolation circuits comprise magnetic isolation chips with the model of TDH541S485H, and signal input and output ends of the magnetic isolation chips form an input and output digital interface and are connected with signal input and output ends of a control host.

The 485 hardware isolation circuit is mainly used for hardware conversion from a serial port of a control host to an environment of a 485 industrial bus, adopts the most advanced magnetic isolation chip at present, and integrates a DCDC channel inside, and has the advantages of small volume, high speed and good anti-interference performance, and is suitable for complex industrial environments.

Further, the Ethernet data circuit adopts an Ethernet data chip with the model of W5500, the signal input end and the output end of the Ethernet data chip are both connected with the logic controller, and the power supply end is connected with the input digital interface.

The Ethernet data circuit mainly solves the data communication connection between the Ethernet data interface access and the logic controller, and realizes the connection between the control host and other Ethernet devices or upper computers.

Further, the LDO step-down voltage stabilizing circuit adopts a first voltage transformation chip with the model of AMS1117, and the 3.3V output end of the first voltage transformation chip is connected with the 3.3V power supply end of the logic controller.

The LDO step-down voltage stabilizing circuit reduces the voltage of 5V to 3.3V to supply power to a microcontroller in the logic controller, and provides an ADC reference power supply of the logic controller.

Further, the digital quantity signal output driving circuit adopts an amplifying chip with the model of ULN2003A, the input end of the amplifying chip is connected with the logic controller, and the output end of the amplifying chip is connected with the output digital interface.

The digital quantity signal output driving circuit is mainly used for weak current digital signals output by the logic controller, and the weak current digital signals can be amplified to digital signal units which can directly drive the relay and the outside and have larger current through the amplifying chip.

Further, the four-wire 422 circuit adopts a conversion chip with the model number of SP491EEN, and signal input and output ends of the conversion chip are connected to the logic controller.

The four-wire 422 circuit is mainly used for a hardware interface for communication between the logic controller and equipment with 422 type interfaces, and the interface is mainly used for a special physical interface for man-machine interface, programming writing, monitoring and maintenance in a system.

Further, the standard DCDC switching power supply circuit adopts a second transformer chip with the model number of 34063, and a 5V output end and a 24V output end of the second transformer chip are both connected to a power supply end of the logic controller.

The standard DCDC switching power supply circuit is mainly used for reducing the working voltage to the working voltage of a chip or a related circuit, and has the advantages of high efficiency, small heating and good stability.

The beneficial effects are that: compared with the prior art, the utility model has the advantages that:

by adopting the design scheme of the utility model, the real-time communication and signal synchronization with the control host can be realized, the operation load of the control host is reduced, the temporary management and control of the integrated central air conditioner is realized after the control host is down, the irreversible consequences of machine down parts of the control host are prevented, and the product has high integration level, small size and greatly reduced cost compared with the control host, and has better industrial application prospect.

Drawings

FIG. 1 is a logical block diagram of the present utility model;

FIG. 2 is a schematic diagram of the circuit connections at the logic controller of the present utility model;

FIG. 3 is a circuit diagram of a 485 hardware isolation circuit according to the utility model;

FIG. 4 is a circuit diagram of an Ethernet data circuit of the utility model;

FIG. 5 is a circuit diagram of the LDO buck regulator circuit of the present utility model;

FIG. 6 is a circuit diagram of a digital quantity signal output driving circuit according to the present utility model;

FIG. 7 is a circuit diagram of a four wire 422 circuit of the present utility model;

fig. 8 is a circuit diagram of a standard DCDC switching power supply circuit of the present utility model.

Detailed Description

The utility model will now be described in further detail with reference to the drawings and examples.

Example 1

As shown in fig. 1 to 8, a novel intelligent gateway circuit structure for an integrated central air conditioner is provided, an input/output end of a gateway circuit is connected with a control host of the integrated central air conditioner, an output end of the gateway circuit is connected with the integrated central air conditioner, the novel intelligent gateway circuit structure comprises a logic controller U1A with a model of STM32F103RET6, PA2, PA3 and PA4 pins of the logic controller U1A are connected with a first 485 hardware isolation circuit, PB10, PB11 and PB12 pins are connected with a second 485 hardware isolation circuit, PC10, PC11 and PA15 pins are connected with a third 485 hardware isolation circuit, PA5, PA6, PA7, PB5, PB6 and PB7 are connected with an ethernet data interface circuit, a VDDA pin is connected with an LDO voltage stabilizing circuit, and PA2, PA3, PA4 and PA5 pins are connected with digital quantity signal output driving circuits, and output ends of the logic controller U1A PA2, PA 11 and PA4 pins are connected with a four-wire output digital interface P3C, PA8, PA9 and PA10 pins are connected with a 422 circuit.

A standard DCDC switching power supply circuit capable of powering the logic controller U1A is also included.

The three 485 hardware isolation circuits comprise magnetic isolation chips U1F with the model of TDH541S485H, and signal input and output ends of the magnetic isolation chips U1F form an input and output digital interface P2C and are connected with signal input and output ends of a control host.

Specifically, as can be seen from fig. 3, the RX pin of the magnetic isolation chip is connected to the RX pin of the logic controller, the RD pin of the magnetic isolation chip is connected to the DX pin of the logic controller, the TX pin of the magnetic isolation chip is connected to the TX pin of the logic controller, the pins a and B are signal interaction pins, and the pin E is an anti-interference pin.

The Ethernet data circuit adopts an Ethernet data chip U1E with the model W5500, the signal input end and the output end of the Ethernet data chip U1E are both connected with a logic controller U1A, and the power supply end is connected with an input digital interface P1C.

The LDO step-down voltage stabilizing circuit adopts a first voltage transformation chip U1D with the model of AMS1117, and the 3.3V output end of the first voltage transformation chip U1D is connected with the 3.3V power supply end of the logic controller U1A.

The LDO buck voltage stabilizing circuit reduces the 5V voltage to 3.3V to supply power to a microcontroller in the logic controller, and simultaneously provides an ADC reference power supply VCA of the logic controller.

The digital quantity signal output driving circuit adopts an amplifying chip U1B with the model of ULN2003A, the input end of the amplifying chip U1B is connected with a logic controller U1A, and the output end of the amplifying chip U1B is connected with an output digital interface P3C.

The four-wire 422 circuit adopts a conversion chip IC200 with the model number SP491EEN, and the signal input and output ends of the conversion chip IC200 are connected to a logic controller U1A.

The standard DCDC switching power supply circuit adopts a second transformer chip U1G with the model number of 34063, and a 5V output end and a 24V output end of the second transformer chip U1G are connected to a power supply end of the logic controller U1A.

The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. A novel intelligent gateway circuit structure for integrated form central air conditioning, the control host computer of integrated form central air conditioning is connected to gateway circuit's input/output end, and integrated form central air conditioning is connected to gateway circuit's output end, its characterized in that: the intelligent control system comprises a logic controller with the model of STM32F103RET6, wherein the pins PA2, PA3 and PA4 of the logic controller are connected with a first 485 hardware isolation circuit, the pins PB10, PB11 and PB12 are connected with a second 485 hardware isolation circuit, the pins PC10, PC11 and PA15 are connected with a third 485 hardware isolation circuit, the pins PA5, PA6, PA7, PB5, PB6 and PB7 are connected with an Ethernet data interface circuit, the pins VDDA are connected with an LDO voltage-stabilizing circuit, the pins PA2, PA3, PA4 and PA5 are connected with a digital quantity signal output drive circuit, the output ends of the pins PC8, PC9 and the digital quantity signal output drive circuit are connected with an output digital interface, and the pins PA8, PA9 and PA10 are connected with a four-wire 422 circuit.

2. The novel intelligent gateway circuit structure for an integrated central air conditioner according to claim 1, wherein: a standard DCDC switching power supply circuit capable of powering the logic controller is also included.

3. The novel intelligent gateway circuit structure for an integrated central air conditioner according to claim 1, wherein: the three 485 hardware isolation circuits comprise magnetic isolation chips with the model of TDH541S485H, and signal input and output ends of the magnetic isolation chips form an input and output digital interface and are connected with signal input and output ends of a control host.

4. The novel intelligent gateway circuit structure for an integrated central air conditioner according to claim 1, wherein: the Ethernet data circuit adopts an Ethernet data chip with the model of W5500, the signal input end and the output end of the Ethernet data chip are both connected with the logic controller, and the power supply end is connected with the input digital interface.

5. The novel intelligent gateway circuit structure for an integrated central air conditioner according to claim 1, wherein: the LDO step-down voltage stabilizing circuit adopts a first transformer chip with the model of AMS1117, and the 3.3V output end of the first transformer chip is connected with the 3.3V power supply end of the logic controller.

6. The novel intelligent gateway circuit structure for an integrated central air conditioner according to claim 1, wherein: the digital quantity signal output driving circuit adopts an amplifying chip with the model of ULN2003A, the input end of the amplifying chip is connected with the logic controller, and the output end of the amplifying chip is connected with the output digital interface.

7. The novel intelligent gateway circuit structure for an integrated central air conditioner according to claim 1, wherein: the four-wire 422 circuit adopts a conversion chip with the model number of SP491EEN, and the signal input and output ends of the conversion chip are connected to the logic controller.

8. The novel intelligent gateway circuit structure for an integrated central air conditioner according to claim 2, wherein: the standard DCDC switching power supply circuit adopts a second transformer chip with the model number of 34063, and a 5V output end and a 24V output end of the second transformer chip are both connected to a power supply end of the logic controller.