CN117492404B

CN117492404B - Contact control circuit, control method, electronic device, and storage medium

Info

Publication number: CN117492404B
Application number: CN202410001075.5A
Authority: CN
Inventors: 王升; 杨金龙; 鲁志强; 丁文涛; 姜春苗
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2024-01-02
Filing date: 2024-01-02
Publication date: 2024-05-03
Anticipated expiration: 2044-01-02
Also published as: CN117492404A

Abstract

The invention discloses a contact control circuit, a control method, an electronic device and a storage medium, wherein the contact control circuit comprises: the control interface receives single-contact input of the controller, adopts a double-contact output control device to start the relay circuit, adopts a device to stop the relay circuit and adopts a device to stop the relay circuit, adopts the device to start the relay circuit and adopts the device to stop the relay circuit, adopts the device to stop the relay circuit to connect in parallel with the device to stop the relay circuit, adopts an upper port to connect in series to connect in power supply, adopts the device to stop the relay circuit to connect in series to connect in power supply with a lower port, and only needs to issue a single-contact device control command for the controller, thereby the control device realizes conversion and output of the double-contact, realizes the single-contact control device double-contact start-stop loop of the controller, and simultaneously also satisfies the power failure or faults when the controller is powered off, and reduces the output point of the controller and a control cable.

Description

Contact control circuit, control method, electronic device, and storage medium

Technical Field

The invention relates to the technical field of automatic control, in particular to a contact control circuit, a control method, electronic equipment and a storage medium.

Background

At present, in some important air conditioning system occasions, such as data centers, energy stations and the like, when a PLC/DDC controller of a control system is required to be powered off or to be in fault, key equipment such as a chiller, a water pump, a fan and the like can continue to operate.

In the related technology, the common practice is that a PLC/DDC controller adopts double-contact control (on control and off control) equipment to start and stop, namely, the starting and stopping are two independent electric loops, namely, the on control loop is closed, the off control loop is opened, and the equipment is started; the open control loop is opened, the closed control loop is closed, and the equipment is stopped; the open control loop is disconnected, the closed control loop is disconnected, and the equipment maintains the former action state.

Although the above-mentioned technology can meet the related use requirements, it must also cause the control output point of the controller and the control cable to be multiplied.

Disclosure of Invention

In view of the above, the present application provides a contact control circuit, a control circuit, an electronic device, and a storage medium to solve at least the problems in the related art.

In a first aspect, the present invention provides a contact control circuit comprising: the device comprises a controller, a control interface, a device start relay circuit, a device stop relay circuit and a device operation relay circuit;

The control interface receives single-contact input of the controller, adopts double-contact output to control the equipment start relay circuit, the equipment stop relay circuit and the equipment operation relay circuit, and comprises an upper end interface and a lower end interface;

The equipment starting relay circuit is connected in parallel with the equipment stopping relay circuit and is connected in series with a power supply through the upper end interface;

And the equipment operation relay circuit is connected with the lower port interface in series and connected with a power supply.

In one embodiment, the upper interface comprises: a control interface and a state output interface are accepted;

the receiving control interface and the state output interface are both connected with a down control device;

the receiving control interface is connected with the controller to receive instructions;

and the state output interface is connected with the controller and feeds back the running state signal of the lower control equipment.

In one embodiment, the lower interface comprises: the system comprises a starting interface, a stopping interface and a state acquisition interface;

The starting interface, the stopping interface and the state acquisition interface are all connected with the lower control equipment;

The starting interface is used for outputting a starting command of the lower control equipment;

the stop interface is used for outputting a stop command of the lower control device;

The state acquisition interface is used for acquiring the running state of the lower control equipment.

In one embodiment, the device start relay circuit includes: normally-open contacts of a device starting relay, normally-closed contacts of a device running relay, normally-closed contacts of a device stopping relay and a device starting relay coil;

and the normally open contact of the equipment starting relay is connected in parallel with the normally closed contact of the equipment running relay and is connected in series with the normally closed contact of the equipment stopping relay and the equipment starting relay coil.

In one embodiment, the apparatus stops the relay circuit, comprising: a normally open contact of the equipment stop relay, a normally open contact of the equipment running relay, a normally closed contact of the equipment starting relay and a coil of the equipment stop relay;

And the normally open contact of the equipment operation relay is connected in parallel with the normally open contact of the equipment stop relay and is connected in series with the normally closed contact of the equipment start relay and the equipment stop relay coil.

In one embodiment, a device operation relay circuit includes: operating a relay coil by the equipment;

And the equipment operation relay coil and the state acquisition interface are connected in series to be connected with a power supply.

In a second aspect, an embodiment of the present application provides an electronic device, including the power supply circuit in the first aspect.

In a third aspect, an embodiment of the present application provides a control method, which is applied to the electronic device in the second aspect, including:

acquiring a device control command of the controller for issuing a single contact to the control interface;

Determining the opening and closing states of the single contacts corresponding to the equipment control command;

and controlling the operation of the lower control equipment based on the on-off state.

In one embodiment, the method further comprises:

Determining the running state of the lower control equipment based on the state acquisition interface;

And transmitting the running state to a user terminal based on the state output interface.

In a fourth aspect, embodiments of the present application provide a readable storage medium having stored thereon a program or instructions which when executed by a processor perform the steps of the control method as in the third aspect.

One or more embodiments of the above-described solution may have the following advantages or benefits compared to the prior art:

The contact control circuit provided by the invention comprises: the control interface receives single-contact input of the controller, adopts double-contact output to control the equipment start relay circuit, the equipment stop relay circuit and the equipment operation relay circuit, comprises an upper end interface and a lower end interface, is connected in parallel with the equipment start relay circuit and is connected in series with a power supply through the upper end interface, the device operation relay circuit is connected with the lower port in series to be connected with a power supply, and the controller only needs to issue a device control command of a single contact, so that the control device realizes conversion and output of double contacts, realizes the double-contact start-stop loop of the single-contact control device of the controller, simultaneously meets the related control requirements that key lower control devices such as a chiller, a water pump, a fan and the like can keep in an original operation state continuously when the controller is powered off or fails, and reduces the output point positions and control cables of the controller.

Drawings

The scope of the present disclosure may be better understood by reading the following detailed description of exemplary embodiments in conjunction with the accompanying drawings. The drawings included herein are:

FIG. 1 illustrates a schematic diagram of an electrical circuit configuration of an exemplary contact control circuit provided in accordance with an embodiment of the present invention;

Fig. 2 shows a schematic view of an exemplary contact switching device control apparatus according to an embodiment of the present invention;

FIG. 3 illustrates an exemplary single-contact input, double-contact output control architecture provided by embodiments of the present invention;

FIG. 4 illustrates an exemplary operating state relay circuit schematic provided by an embodiment of the present invention;

FIG. 5 illustrates an exemplary start (run) relay contact schematic provided by an embodiment of the present invention;

FIG. 6 illustrates an exemplary stop (close) relay contact schematic provided by an embodiment of the present invention;

FIG. 7 is a schematic diagram of an exemplary circuit electrical circuit configuration of an exemplary contact control circuit according to an embodiment of the present invention;

FIG. 8 is a flow chart of an exemplary control method provided by an embodiment of the present invention;

fig. 9 shows a block diagram of an electronic device for executing a control method according to an embodiment of the present application, which is proposed in an embodiment of the present application;

Fig. 10 illustrates a computer-readable storage medium for saving or carrying a control method implementing an embodiment according to the present application, which is proposed in an embodiment of the present application.

Detailed Description

The present invention will be further described in detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent, and the described embodiments should not be construed as limiting the present invention, and all other embodiments obtained by those skilled in the art without making any inventive effort are within the scope of the present invention.

In the following description, reference is made to "some embodiments" which describe a subset of all possible embodiments, but it is to be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with one another without conflict.

The following description is added if a similar description of "first/second/third" appears in the application, in which the terms "first/second/third" are merely distinguishing between similar objects and not representing a particular ordering of the objects, it being understood that "first/second/third" may be interchanged with a particular order or precedence, where allowed, to enable embodiments of the invention described herein to be practiced otherwise than as illustrated or described herein.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing embodiments of the invention only and is not intended to be limiting of the invention.

In the prior art, the start/stop control of 1 device usually occupies 2 output points of the controller, and 2 groups of corresponding control cables are also required. The double-contact control is realized by: the open contact is closed, the closed contact is opened, and the equipment is opened (operated); the open contact is opened, the closed contact is closed, and the device is closed (stopped); the switch contacts are opened, the equipment is kept in an original state, and the equipment operates in the mode, and although the mode can meet related use requirements, the control output point of the controller and the control cable are increased in multiple.

Based on the problems existing in the related art, an embodiment of the present invention provides a contact control circuit, including: the device comprises a controller, a control interface, a device start relay circuit, a device stop relay circuit and a device operation relay circuit;

the control interface receives single-contact input of the controller, adopts double-contact output control equipment to start a relay circuit, adopts equipment to stop the relay circuit and adopts equipment to run the relay circuit, and comprises an upper end interface and a lower end interface;

the equipment starting relay circuit is connected in parallel with the equipment stopping relay circuit and is connected in series with a power supply through an upper end interface;

the device operation relay circuit is connected with the lower end interface in series and connected with a power supply.

The control part of the contact control circuit can be composed of an upper end interface, a central processing circuit and a lower end control interface.

Referring to fig. 2, fig. 2 is a schematic diagram of start-stop of an exemplary contact switching device control apparatus, where start/stop control of 1 apparatus only occupies 1 output point of the controller, and only 1 group of corresponding control cables is required. Single contact control: the contact is closed for the first time, and the device is opened (running); the contact is opened, and the equipment keeps running; the contacts are closed again, the equipment is closed, and the switching action of the equipment is realized in a circulating way.

Specifically, the upper interface is an upper control receiving and status output interface.

The receiving control interface and the state output interface are both connected with a lower control device;

The acceptance control interface is connected with the controller to accept instructions;

the state output interface is connected with the controller to feed back the running state signal of the down control equipment.

Referring to fig. 3, fig. 3 is a schematic diagram of an exemplary single-contact input/double-contact output control structure provided by an embodiment, as shown in fig. 3, there are two upper control receiving and status output interfaces, and the first interface (PLC 1, 2) is an active interface and is responsible for receiving a control command of an upper control system, that is, receiving a single-contact start-stop command of a device issued by the PLC/DDC shown in fig. 2; the second interfaces (RUN 5, 6) are passive interfaces (not shown in the figures) and are responsible for the output of the operating state of the device to be controlled, i.e. providing the actual operating state signal of the device to the head-end control system.

Specifically, the lower end interface is a lower end control output and acquisition interface.

As shown in fig. 3, ON the right side of fig. 3, there are three lower control output and acquisition interfaces, and the first interface (the device start control contacts ON5 and 6) is a passive interface and is responsible for the start command output of the lower control device; the second interface (device stop control contacts OFF5 and OFF 6) is a passive interface and is responsible for the output of a stop command of the lower control device; the third interface (DE 1, 2) is an active interface and is responsible for the collection of the running state of the lower control device.

In the normal working state, the equipment start control contact and the equipment stop control contact are mutually exclusive.

The electrical circuit is constructed as follows:

referring to fig. 1, the central processing circuit mainly comprises a power supply and a plurality of relays to form a related electrical loop, and is responsible for converting a single-contact input into a double-contact output, and the specific configuration conditions are as follows:

in one embodiment, a device start relay circuit includes: normally-open contacts of a device starting relay, normally-closed contacts of a device running relay, normally-closed contacts of a device stopping relay and a device starting relay coil;

the normally open contact of the equipment starting relay is connected in parallel with the normally closed contact of the equipment running relay and is connected in series with the normally closed contact of the equipment stopping relay and the equipment starting relay coil.

In the embodiment of the application, the equipment starting relay circuit in fig. 1 is connected in parallel with the normally closed contacts (RUN 7 and RUN 8) of the equipment running relay through normally open contacts (ON 3 and ON 4) of the equipment starting relay and then connected in series with normally closed contacts (OFF 7 and OFF 8) of the equipment stopping control relay and coils (ON 1 and ON 2) of the equipment starting control relay.

In one embodiment, an apparatus stops a relay circuit, comprising: a normally open contact of the equipment stop relay, a normally open contact of the equipment running relay, a normally closed contact of the equipment starting relay and a coil of the equipment stop relay;

The normally open contact of the equipment running relay is connected in parallel with the normally open contact of the equipment stopping relay, and is connected in series with the normally closed contact of the equipment starting relay and the equipment stopping relay coil.

In the embodiment of the application, the equipment stop relay circuit is connected in parallel with the normally open contacts (RUN 3 and RUN 4) of the equipment operation relay through the normally open contacts (OFF 3 and OFF 4) of the equipment stop control relay, and then is connected in series with the normally closed contacts (ON 7 and ON 8) of the equipment start control relay and the coils (OFF 1 and OFF 2) of the equipment stop control relay.

In the embodiment of the application, the equipment start relay circuit is connected in parallel with the equipment stop relay circuit, and then connected in series with the upper control receiving interface and connected into a power supply.

The device operation relay coil and the state acquisition interface are connected in series to be connected with a power supply.

Referring to fig. 4, fig. 4 is a schematic diagram of an exemplary operating state relay circuit provided in an embodiment of the present application, as shown in fig. 4, the device operating relay circuit is connected in series with the lower device operating state acquisition interfaces (DE 1, 2) through the device operating relay coils (RUN 1, 2) and is connected to a power supply.

As shown in fig. 7, fig. 7 is a schematic diagram of an exemplary circuit electrical loop structure of an exemplary contact control circuit according to the present application, where the positions of the corresponding relay contacts and coils can be adjusted according to the adjustment principle: the parallel sections are interchangeable in position and the series sections are interchangeable in position. Wherein, as shown in the upper left part of fig. 7, two relay contacts are connected in parallel in the frame, the left and right positions of the two relay contacts can be exchanged, as shown in the lower left part of fig. 7, one relay coil is connected in series with one relay contact in the frame, the upper and lower positions can be exchanged, as shown in the right part of fig. 7, two block diagrams of the upper and lower parts are connected in series integrally, and the upper and lower positions can be exchanged.

In one embodiment, an electronic device includes the contact control circuit of any of the above.

In an embodiment, as shown in fig. 8, the present application further provides a control method, which is applied to the above electronic device, including:

s110: acquiring a device control command of a single contact issued by a controller to a control interface;

s120: determining the opening and closing states of the single contacts corresponding to the equipment control command;

s130: and controlling the operation of the lower control equipment based on the on-off state.

In this embodiment, by using a central processing circuit, including a control command input, a start control relay, a stop control relay, and an operation relay, 1 start-stop control command is converted into two mutually exclusive control commands (start and stop) output in a two-cycle issuing manner, so that the requirement that the lower control device still maintains the original operation state when the controller is powered off or fails can be met.

In one embodiment, the control method further comprises:

and transmitting the running state to the user terminal based on the state output interface.

In the embodiment of the present application, as shown in fig. 4, the second interfaces (RUN 5, 6) are passive interfaces, and are responsible for outputting the running state of the lower control device, that is, providing the actual running state signal of the device to the upper control system, and the third interfaces (DE 1, 2) in fig. 4 are active interfaces, and are responsible for collecting the running state of the lower control device. In a normal working state, the equipment start control contact and the equipment stop control contact are mutually exclusive.

It should be noted that, in the state where the contacts of the PLC1 and 2 are opened, the original working state of the lower control device needs to be maintained, and the description herein describes the action situation of all other relay contacts after the contacts of the PLC1 and 2 are opened in the state where the device is started and operated.

In the case of opening the contacts of the PLCs 1 and 2, there are the following cases: the control system corresponding to the upper end actively cuts off the switch command, the control system corresponding to the upper end is powered off or the control system corresponding to the upper end is failed.

The specific implementation mode is as follows:

Referring to fig. 1, 5 and 6, fig. 5 is a schematic diagram of an exemplary start (operation) relay contact provided by an embodiment, fig. 6 is a schematic diagram of an exemplary stop (close) relay contact provided by an embodiment, fig. 5 and 6 are related to a corresponding start control contact and a stop control contact in fig. 3, after an upper end control issues a device switch command for the first time, contacts of control interfaces PLC1 and 2 are closed, a device start relay ON coil is powered ON, normally open contacts ON3 and 4 and ON5 and 6 are closed, and normally closed contacts ON7 and 8 are opened as shown in fig. 1 and 5; the device stop relay OFF coil is kept OFF, and as shown in fig. 1 and 6, the normally open contacts OFF3 and 4 and OFF5 and 6 are opened, and the normally closed contacts OFF7 and 8 are closed. As shown in fig. 5 and 6, the lower-end interface device start control contacts ON5, 6 are closed, the device stop control contacts OFF5, 6 are opened, and the lower control device is started.

Referring to fig. 1 and fig. 4, after the lower control device is started, the device control cabinet feeds back the operation state of the device to the single-contact input double-contact output control device, namely in fig. 4, the contacts DE1 and DE 2 are closed, the device operation relay coil is electrified, the normally open contacts RUN3 and RUN 4 and RUN5 and RUN 6 are closed, and the normally closed contacts RUN7 and RUN 8 are opened.

Referring to fig. 1,5 and 6, after the lower control device is started and successfully operates, if the upper control system controller is powered OFF or fails at this time, the contacts PLC1 and 2 are opened, the device start relay ON coil is powered OFF, the device stop relay OFF coil is powered OFF, all normally open contacts are opened, and all normally closed contacts are closed. As shown in fig. 5, the lower-end interface device start control contacts ON5, 6 are opened, and as shown in fig. 6, the device stop control contacts OFF5, 6 are opened, and the lower control device still maintains the original working state (keeps running). The control requirement that key equipment such as a chiller, a water pump, a fan and the like can continue to keep running when the PLC/DDC controller of the control system is powered off or fails is met.

Referring to fig. 1, 4, 5 and 6, when the equipment needs to be stopped, the upper control firstly opens the equipment switch command, the equipment start relay ON coil is powered OFF, the equipment stop relay OFF coil is powered OFF (the equipment keeps the original working state at the moment), at the moment, the upper control system performs the second switch command issuing again, the contacts of the PLC1 and 2 are closed, the normally open contacts RUN3 and 4 and RUN5 and 6 are closed, and the normally closed contacts RUN7 and 8 are opened as shown in fig. 4 because the equipment operation relay RUN coil keeps power; as shown in fig. 5, the device start relay ON coil is kept off, its normally open contacts ON3, 4 and ON5, 6 are opened, and its normally closed contacts ON7, 8 are closed; the device stop relay OFF coil is energized, and as shown in fig. 6, its normally open contacts OFF3, 4 and OFF5, 6 are closed, and its normally closed contacts OFF7, 8 are opened. The lower-end interface device starts the control contacts ON5 and 6 to be opened, the device stops the control contacts OFF5 and 6 to be closed, and the lower control device stops.

Referring to fig. 1 and 4, after the lower control device stops, its operation state is closed, as shown in fig. 4, contacts DE1 and 2 are opened, the RUN coil of the device operation relay RUN is powered off, normally open contacts RUN3 and 4 and RUN5 and 6 are reset, and normally closed contacts RUN7 and 8 are reset. At the moment, the upper control system cuts OFF a switch control command, so that the equipment stop relay OFF coil is powered OFF, the equipment start relay ON coil is kept powered OFF, the equipment operation relay RUN coil is kept powered OFF, and all relevant relay contacts are reset.

The device start, hold, stop process ends up.

Referring to fig. 9, fig. 9 is a block diagram of an electronic device 200 capable of executing the control method according to an embodiment of the present application, where the electronic device 200 may be a smart phone, a tablet computer, a computer or a portable computer.

The electronic device 200 also includes a processor 202 and a memory 204. The memory 204 stores therein a program capable of executing the contents of the foregoing embodiments, and the processor 202 can execute the program stored in the memory 204.

Processor 202 may include one or more cores for processing data and a message matrix unit, among other things. The processor 202 utilizes various interfaces and lines to connect various portions of the overall electronic device 200, perform various functions of the electronic device 200, and process data by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 204, and invoking data stored in the memory 204. Alternatively, the processor 202 may be implemented in at least one hardware form of digital signal Processing (DIGITAL SIGNAL Processing, DSP), field-Programmable gate array (Field-Programmable GATEARRAY, FPGA), editable logic array (Programmable Logic Array, PLA). The processor 202 may integrate one or a combination of several of a central processing unit (Central Processing Unit, CPU), an image processor (Graphics Processing Unit, GPU), and a modulation decoder, etc. The CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for being responsible for rendering and drawing of display content; the modem is used to handle wireless communications. It will be appreciated that the above described modulation decoder may not be integrated into the processor and may be implemented solely by a single communication chip.

Memory 204 may include random access Memory (Random Access Memory, RAM) or Read-Only Memory (ROM). Memory 204 may be used to store instructions, programs, code sets, or instruction sets. The memory 204 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for implementing at least one function (e.g., instructions for a user to obtain a random number), instructions for implementing various method embodiments described below, and the like. The stored data area may also store data (e.g., random numbers) created by the terminal in use, and so on.

The electronic device 200 may further include a network module and a screen, where the network module is configured to receive and transmit electromagnetic waves, and implement mutual conversion between the electromagnetic waves and the electrical signals, so as to communicate with a communication network or other devices, such as an audio playing device. The network module may include various existing circuit elements for performing these functions, such as an antenna, a radio frequency transceiver, a digital signal processor, an encryption/decryption chip, a Subscriber Identity Module (SIM) card, memory, and the like. The network module may communicate with various networks such as the internet, intranets, wireless networks, or with other devices via wireless networks. The wireless network may include a cellular telephone network, a wireless local area network, or a metropolitan area network. The screen may display interface content and perform data interaction.

Referring to fig. 10, a block diagram of a computer readable storage medium according to an embodiment of the present application is shown. The computer readable storage medium 400 has stored therein program code 410, the program code 410 being executable by a processor to perform the method described in the above method embodiments.

The computer readable storage medium 400 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. Optionally, the computer readable storage medium comprises a non-volatile computer readable medium (non-transitory computer-readable storage medium). The computer readable storage medium 400 has storage space for program code 410 that performs any of the method steps described above. These program code 410 can be read from or written to one or more computer program products. Program code 410 may be compressed, for example, in a suitable form.

Embodiments of the present application also provide a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions so that the computer device performs the control methods described in the above various alternative implementations.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be appreciated by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Although the embodiments of the present invention are disclosed above, the embodiments are only used for the convenience of understanding the present invention, and are not intended to limit the present invention. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the present disclosure as defined by the appended claims.

Claims

1. A contact control circuit, comprising: the device comprises a controller, a control interface, a device start relay circuit, a device stop relay circuit and a device operation relay circuit;

The control interface receives single-contact input of the controller, adopts double-contact output to control the equipment start relay circuit, the equipment stop relay circuit and the equipment operation relay circuit, and comprises an upper end interface and a lower end interface; the device start relay circuit includes: normally-open contacts of a device starting relay, normally-closed contacts of a device running relay, normally-closed contacts of a device stopping relay and a device starting relay coil; the normally open contact of the equipment starting relay is connected in parallel with the normally closed contact of the equipment running relay and is connected in series with the normally closed contact of the equipment stopping relay and the equipment starting relay coil; the apparatus stop relay circuit includes: a normally open contact of the equipment stop relay, a normally open contact of the equipment running relay, a normally closed contact of the equipment starting relay and a coil of the equipment stop relay; the normally open contact of the equipment operation relay is connected in parallel with the normally open contact of the equipment stop relay and is connected in series with the normally closed contact of the equipment start relay and the equipment stop relay coil; the device operation relay circuit includes: operating a relay coil by the equipment; the device operation relay coil and the state acquisition interface are connected in series to be connected with a power supply;

2. The contact control circuit of claim 1, wherein the upper interface comprises: a control interface and a state output interface are accepted;

3. The contact control circuit of claim 2, wherein the lower interface comprises: the system comprises a starting interface, a stopping interface and a state acquisition interface;

4. An electronic device comprising the contact control circuit of any one of claims 1 to 3.

5. A control method applied to the electronic device of claim 4, comprising:

6. The control method according to claim 5, characterized in that the method further comprises:

7. A computer readable storage medium storing program code that is callable by one or more processors to perform the control method of any one of claims 5-6.