CN112127413A

CN112127413A - Electrical control system, method, controller and excavator

Info

Publication number: CN112127413A
Application number: CN202011003163.7A
Authority: CN
Inventors: 祝敏杰; 王青; 宋吉; 赵艳萍; 代刚强; 仇超敏
Original assignee: Xuzhou XCMG Excavator Machinery Co Ltd
Current assignee: Xuzhou XCMG Excavator Machinery Co Ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2020-12-25

Abstract

The disclosure provides an electrical control system, an electrical control method, a controller and an excavator, and relates to the technical field. An electrical control system of the present disclosure includes: the first relay is connected with the switch and is configured to conduct a first path of the power supply under the condition of power supply; under the condition of power loss, the first path is disconnected; a second relay configured to open the first path in the case of power-on; a third relay configured to conduct the second path in the case of power-on; under the condition of power loss, the second path is disconnected; the controller is configured to start timing when the on signal of the power signal port on the controller is determined to be disconnected; and stopping outputting high level at the first to the four ports when the timing reaches a preset time. The electric control system can stop the reverse rotation of the fan after delaying for a preset time period when flameout is carried out in the reverse rotation mode through the cooperation of the plurality of relays under the control of the controller, so that the failure rate of the fan motor is reduced.

Description

Electrical control system, method, controller and excavator

Technical Field

The disclosure relates to the technical field of electrical control, in particular to an electrical control system, a method, a controller and an excavator.

Background

Because the excavator usually works under the adverse circumstances, long-term and long-term accumulation radiating fan can be blocked by dust, consequently need open the fan reversal function, blow off the full dust of jam to reach the effect of cleaning, maintaining.

Disclosure of Invention

One object of the present disclosure is to reduce the failure rate of a fan motor.

According to an aspect of some embodiments of the present disclosure, there is provided an electrical control system including: the first relay is connected with the switch and is configured to conduct a first path of the power supply under the condition of power supply; under the condition of power loss, the first path is disconnected; the power supply is connected with a power supply input port of the controller through a first path, and the first relay is powered on under the condition that the switch is switched on; a second relay configured to open the first path when the second relay is powered on, wherein the second relay is powered on when the first port of the controller outputs a high level; a third relay configured to conduct the second path in the case of power-on; under the condition of power loss, the second path is disconnected; the power supply is connected with the power supply input port of the controller through a second path, the first path and the second path are connected between the power supply and the power supply input port in parallel, and the third relay is powered on under the condition that the second port of the controller outputs high level; a controller configured to: under the condition that the reverse rotation mode is determined to be executed, outputting a high level at the first port and the second port, and outputting a high level at the third port connected with the reverse rotation valve and the fourth port connected with the heat dissipation pump proportional valve; under the condition that the on-state signal of the power-on signal port of the controller is determined to be disconnected, timing is started; and when the timing reaches a preset time, stopping outputting high level at the first port, the second port, the third port and the fourth port.

In some embodiments, the controller is further configured to: in the case where it is determined that the forward rotation mode is performed, the first port, the second port, and the third port have no output, and a high level is output at the fourth port.

In some embodiments, the controller is further configured to: and under the condition of determining to execute the forward rotation mode, if the conducting signal of the power signal port on the controller is disconnected, immediately stopping outputting the high level at the fourth port.

In some embodiments, the predetermined period of time is 4-8 seconds.

In some embodiments, the electrical control system further comprises: and the monitor is configured to enable a user to select a current operation mode under the condition that the switch is conducted, wherein the operation mode comprises a forward rotation mode and a reverse rotation mode.

In some embodiments, the electrical control system further comprises: the switch is connected with the power-on signal port of the controller through the switch signal port and is configured to output a high level to the power-on signal port of the controller under the condition of conduction; in the case of disconnection, the output of high level to the power-on signal port of the controller is immediately stopped.

In some embodiments, the electrical control system further comprises: and the power supply is connected with the power supply input port of the controller through the first path and the second path respectively and is configured to supply power to the controller.

The electric control system can stop the reverse rotation of the fan after delaying the preset time when flameout is carried out in the reverse rotation mode under the control of the controller through the cooperation of the relays, so that the damage to the fan motor caused by the instant pressure rise of the hydraulic pipeline due to the fact that the reverse rotation valve is suddenly closed and the oil return path forms a closed cavity is avoided, and the failure rate of the fan motor is reduced.

According to an aspect of some embodiments of the present disclosure, there is provided an electrical control method including: in the case of determining that the reverse rotation mode is to be performed, preventing the power from being obtained through a first path with the power supply, obtaining the power through a second path with the power supply, and outputting a high level to a third port connected to the reverse rotation valve and a fourth port connected to the heat-dissipating pump proportional valve; if the flameout is determined to be in the reverse mode, timing is started; and when the timing reaches a preset time, stopping acquiring the electric energy from the second path, and stopping outputting high level to the third port and the fourth port.

In some embodiments, preventing power from being drawn through a first path with a power source, the drawing power through a second path with the power source comprising: outputting a high level through the first port, wherein the second relay is powered on under the condition that the first port outputs the high level, and a first path between the power supply and the controller is disconnected; and outputting a high level through the second port, wherein the third relay is electrified under the condition that the second port outputs the high level, and a second path between the power supply and the controller is conducted.

In some embodiments, determining misfire comprises: determining whether a conducting signal exists at a power-on signal port; and if the conduction signal of the power-on signal port is disconnected, determining to flameout.

In some embodiments, the electrical control method further comprises: and under the condition that the forward rotation mode is determined to be executed, preventing the electric energy from being obtained through a second passage between the electric energy source and the power source, obtaining the electric energy through a first passage between the electric energy source and the power source, and outputting a high level to a fourth port connected with the heat dissipation pump proportional valve.

In some embodiments, the electrical control method further comprises: when the switch is turned off in the forward rotation mode, the output of the high level at the fourth port is immediately stopped.

In some embodiments, preventing power from being drawn through the second path with the power source comprises: blocking output through the first port, wherein the second relay is de-energized and a first path between the power source and the controller is turned on when the first port is not outputting; and blocking output through the second port, wherein the second path between the power source and the controller is disconnected when the third relay is de-energized without output from the second port.

In some embodiments, the electrical control method further comprises: the current operation mode is determined according to a control signal from the monitor, and the operation mode includes a forward rotation mode and a reverse rotation mode.

By the method, when flameout is carried out in the reverse mode, the reverse rotation of the fan is stopped after a preset time is delayed, so that the damage to the fan motor caused by the instant pressure rise of the hydraulic pipeline due to the fact that the reverse rotation valve is suddenly closed and the oil return path forms a closed cavity is avoided, and the failure rate of the fan motor is reduced.

According to an aspect of some embodiments of the present disclosure, there is provided a controller of an electrical control system, including: a memory; and a processor coupled to the memory, the processor configured to perform any of the above electrical control methods based on instructions stored in the memory.

The controller can control the electric control system to stop the reverse rotation of the fan after delaying the preset time when the electric control system is flamed out in the reverse rotation mode, so that the damage of the fan motor caused by the instant pressure rise of the hydraulic pipeline due to the fact that the reverse rotation valve is suddenly closed and the oil return path forms a closed cavity is avoided, and the failure rate of the fan motor is reduced.

According to an aspect of some embodiments of the present disclosure, a computer-readable storage medium is proposed, on which computer program instructions are stored, which instructions, when executed by a processor, implement the steps of any one of the electrical control methods above.

By executing the instructions on the computer readable storage medium, the electric control system can be controlled to stop the reverse rotation of the fan after delaying for a preset time when the electric control system is flamed out in the reverse rotation mode, so that the damage to the fan motor caused by the instant pressure rise of the hydraulic pipeline due to the fact that the reverse rotation valve is suddenly closed and the oil return circuit forms a closed cavity is avoided, and the failure rate of the fan motor is reduced.

According to an aspect of some embodiments of the present disclosure, there is provided an excavator, including: a heat radiation fan configured to rotate to radiate heat; a fan motor configured to provide power for rotation of the heat dissipation fan; a reverse valve configured to control the oil path to and from the fan motor to reverse; and an electrical control system of any of the above.

The electric control system of the excavator can delay the reversal of the fan for a preset time and then stop the reversal of the fan when flameout is carried out in a reversal mode under the control of the controller through the cooperation of the relays, so that the damage to a fan motor caused by the instant pressure rise of a hydraulic pipeline due to the fact that a reversal valve is suddenly closed and an oil return path forms a closed cavity is avoided, the failure rate of the fan motor is reduced, and the service life of the whole excavator is prolonged.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:

fig. 1 is a circuit diagram of some embodiments of an electrical control system of the present disclosure.

Fig. 2A is a circuit state diagram of some embodiments of the electrical control system of the present disclosure.

Fig. 2B is a circuit state diagram of other embodiments of the electrical control system of the present disclosure.

Fig. 3 is a flow chart of some embodiments of an electrical control method of the present disclosure.

FIG. 4 is a flow chart of further embodiments of the electrical control method of the present disclosure.

Fig. 5 is a schematic diagram of some embodiments of a controller of the electrical control system of the present disclosure.

FIG. 6 is a schematic diagram of further embodiments of a controller of the electrical control system of the present disclosure.

Fig. 7 is a schematic view of some embodiments of an excavator of the present disclosure.

Detailed Description

The technical solution of the present disclosure is further described in detail by the accompanying drawings and examples.

The inventor finds that in the fan reverse rotation mode, after flameout, the whole vehicle is powered off, the reverse rotation valve is closed, the hydraulic oil return circuit forms a closed cavity, the pressure of a hydraulic pipeline rises instantly, the motor stops rotating reversely instantly, impact on the motor is large, and the failure rate of the fan motor is high.

A circuit diagram of some embodiments of the electrical control system of the present disclosure is shown in fig. 1.

The first relay 1 is connected with a power supply through a switch 5, and when the switch 5 is closed, the first relay 1 is electrified. When the first relay 1 is powered on, the main contact of the first relay 1 is closed, and when the main contact of the second relay 2 is also closed, a first path between the power supply 6 and the power supply input port 40 of the controller 4 is conducted, and the controller obtains power supply through the first path. Under the condition that the first relay 1 loses power, the main contact of the first relay is disconnected, so that the first path is disconnected, and the controller cannot obtain power supply through the first path. The main contacts of the first relay 1 are normally open main contacts.

The main contacts of the second relay 2 are also located in the first path. The first relay 2 is connected to the first port 41 of the controller 4, and is powered when the first port 41 of the controller 4 outputs a high level. When the second relay 2 is energized, its main contact is opened, thereby opening the first path. The main contact of the second relay 2 is a normally closed main contact.

The main contact of the third relay 3 is located on the second path between the power supply and the power input port 40, and when closed, the second path is turned on, and the controller is powered through the second path. The second path is disconnected from the first path in parallel between the power source 6 and the power source input port 40 in the event of a power loss. The third relay 3 is connected to the second port 42 of the controller 4, and when the second port 42 outputs a high level, the third relay 3 is energized, the main contact is closed, and the second path is turned on. The main contacts of the third relay 3 are normally open main contacts.

The controller 4 has a plurality of ports including a power input port 40, a first port 41, a second port 42, and a third port 43 to which a reverse valve is connected and a fourth port 44 to which a heat-pump proportional valve is connected. In addition, the controller 7 further includes a power-on signal port connected to the switch 5, and determines whether the switch 5 is closed according to whether the power-on signal port 45 is powered on, wherein when the switch 5 is closed, the power-on signal port 45 is powered on, and when the switch 5 is opened, the power-on signal port 45 is powered off.

When the controller 4 operates in the reverse rotation mode, a high level is output at the first port 41 and the second port 42 thereof, so that the second relay 2 and the third relay 3 are energized. In some embodiments, the circuit state diagram of the electrical control system in the reverse mode may be as shown in fig. 2A. Current flows from the power supply 6 to the controller 4 in the direction of the black arrows.

In the inversion mode, when the on signal of the power-on signal port 45 of the controller 4 is turned off, the controller starts timing and maintains the level of each port during the timing. When the time count reaches a predetermined time, the high output from the first port 41, the second port 42, the third port 43, and the fourth port 44 is stopped.

In some embodiments, the controller 4 may also operate in a forward mode. When the switch 5 is turned on, if the controller 4 operates in the forward rotation mode, no output is output from the first port 41, the second port 42, and the third port 43, and a high level is output from the fourth port, so that the fan keeps receiving power from the first path and rotates forward. In some embodiments, the circuit state diagram of the electrical control system in the forward mode may be as shown in fig. 2B. Current flows from the power supply 6 to the controller 4 in the direction of the black arrows. In some embodiments, when the switch 5 is turned off in the forward rotation mode, the controller detects that the on signal of the power-on signal port is turned off, and immediately stops outputting the high level at the fourth port, so that the fan is stopped.

In the electrical control system, different power supply paths are adopted in the forward rotation mode and the reverse rotation mode, so that the operation in the forward rotation mode is not influenced while the delayed shutdown in the reverse rotation mode is realized, and the compatibility is improved.

In some embodiments, as shown in fig. 1, the electrical control system may further include a switch 5, which may be a key switch, to avoid random start, and improve the safety of the device. The switch 5 is connected with the power-on signal port of the controller through the switch signal port, and outputs high level to the power-on signal port of the controller under the condition of conduction; in the case of disconnection, the output of high level to the power-on signal port of the controller is immediately stopped. The electrical control system can inform the controller of the starting or stopping state of the equipment in time so that the controller can respond in time; in addition, the switch 5 can control the power-on state of the first relay 1, further control whether to cut off the first path, and can also improve the timeliness of stopping in the forward rotation mode of adopting the first path to supply power, thereby improving the construction safety.

In some embodiments, as shown in fig. 1, the electrical control system may further include a power source 6 capable of serving as a power supply for the electrical control system to control the operating state of the fan.

In some embodiments, as shown in fig. 1, the electrical control system may further include a monitor 7 capable of providing a user with a switch on to select a current operating mode, which includes a forward rotation mode and a reverse rotation mode. In some embodiments, the supervisor 7 may interact with the controller 4 via a CAN bus. In some embodiments, the monitor 7 can display the operating status and parameters of the entire vehicle, and the user can select the fan reverse mode through the monitor touch screen, so that the main controller and the hydraulic pipeline enter the fan reverse control state.

The electric control system can facilitate users to know the equipment state, select the mode and improve the user friendliness.

A flow chart of some embodiments of the electrical control method of the present disclosure is shown in fig. 3. In the case where any one of the electrical control systems as shown hereinabove is operating, the following operations are performed:

in step 301, it is determined whether the controller is in reverse mode. If the mode is the reverse mode, go to step 302; otherwise, the flow shown in fig. 4 may be referred to.

In step 302, the controller is prevented from drawing power through a first path with the power source such that the controller draws power through a second path with the power source. In some embodiments, as shown in fig. 1, a high level may be output through the first port and a high level may be output through the second port, such that the first path is turned off and the second path is turned on.

In step 303, a high level is output to the third port to which the inversion valve is connected and the fourth port to which the heat-pump proportional valve is connected.

In step 304, it is monitored whether a misfire occurred in the reverse mode. If yes, go to step 305; otherwise, the monitoring is continued. In some embodiments, the controller may determine whether a misfire occurred by determining whether a turn-on signal is present at the power-on signal port: and if the conduction signal of the power-on signal port is disconnected, determining to flameout.

In step 305, a timer is started.

In step 306, it is determined whether a predetermined time period has been timed out. In some embodiments, the predetermined time period may be 4-8 seconds. If the preset time is reached, go to step 307; if the preset time length is not reached, the current state is kept for waiting until the preset time length is reached.

In step 307, the power supply from the second path is stopped, and the output of the high level to the third port and the fourth port is stopped, so that the fan is stopped.

A flow chart of further embodiments of the electrical control method of the present disclosure is shown in fig. 4. In the case where any one of the electrical control systems as shown hereinabove is operating, the following operations are performed:

in step 401, it is determined whether the controller is in a forward mode. If in the forward rotation mode, step 402 may be executed; otherwise, reference may be made to the operation running in the embodiment shown in fig. 3.

In step 402, power is prevented from being drawn through the second path with the power source and power is prevented from being drawn through the first path with the power source. In some embodiments, as shown in fig. 1, the output through the first port and the output through the second port may be blocked, such that the second and third relays are energized, and the first path is conductive and the second path is open.

In step 403, a high level is output to the fourth port connected to the proportional valve of the heat dissipation pump, and a high level is not output to the third port, so that the effect of forward rotation of the fan is achieved.

In step 404, whether a misfire occurred in the forward rotation mode is monitored. If yes, go to step 405; otherwise, the monitoring is continued.

In step 405, the output of the high level at the fourth port is immediately stopped, so that the fan starts to stop rotating.

By the method, the electric control system can be stopped in time according to user operation in a forward rotation mode, unnecessary delay operation is avoided, the reaction speed of equipment is guaranteed, and the construction safety is improved.

In some embodiments, when the switch of the electrical control system is closed and operated, the control signal of the monitor can be received, and the operation mode of the controller and the electrical control system can be adjusted. The operation mode can comprise a forward rotation mode and a reverse rotation mode, so that the mode selection can be conveniently carried out by a user, and the user friendliness is improved.

A schematic diagram of an embodiment of a controller of an electrical control system of the present disclosure is shown in fig. 5. The controller of the electrical control system comprises a memory 501 and a processor 502. Wherein: the memory 501 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory is for storing instructions in the corresponding embodiments of the electrical control method above. The processor 502 is coupled to the memory 501 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 502 is used for executing the instructions stored in the memory, so that the failure rate of the fan motor can be reduced, and the service life of the equipment can be prolonged.

In one embodiment, as also shown in fig. 6, the controller 600 of the electrical control system includes a memory 601 and a processor 602. The processor 602 is coupled to the memory 601 by a BUS 603. The controller 600 of the electrical control system may also be connected to an external storage device 605 via a storage interface 604 for invoking external data, and may also be connected to a network or another computer system (not shown) via a network interface 606. And will not be described in detail herein.

In the embodiment, the data instructions are stored in the memory, and the instructions are processed by the processor, so that the failure rate of the fan motor can be reduced, and the service life of the equipment can be prolonged.

In another embodiment, a computer-readable storage medium has stored thereon computer program instructions which, when executed by a processor, implement the steps of the method in the corresponding embodiment of the electrical control method. As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

A schematic diagram of some embodiments of the excavator of the present disclosure is shown in fig. 7.

The electrical control system 71 may be any one of the above mentioned, and the controller in the electrical control system 71 may be any one of the above mentioned, and performs any one of the above mentioned electrical control methods. The controller can control the on-off of the fan reversal valve and control the flow of the proportional valve of the heat dissipation pump.

The heat radiation fan 72 can rotate to radiate heat under the control of the electrical control system 71.

The fan motor 74 can power the rotation of the heat dissipation fan.

The reversing valve 75 can control the oil path to and from the fan motor to reverse, thereby reversing the direction of rotation of the radiator fan 72.

When the fan rotates forwards, the oil path enters the motor from the pipeline A, and the oil path flows out of the motor from the pipeline B; when the fan rotates reversely, the oil path enters the motor from the pipeline B, and the oil path flows out of the motor from the pipeline A.

When a user extinguishes the excavator through the key switch, the controller is continuously electrified for 4-8 seconds, the fan reversing valve is continuously switched on, the fan is slowly stopped within 4-8 seconds, the reverse oil return path continuously enters the system for oil return, the motor is slowly stopped, no impact is caused to the motor, the situation that the oil return path forms a closed cavity due to the fact that the reversing valve is suddenly closed, the pressure of a hydraulic pipeline is instantly increased, the motor instantly stops reverse rotation, the high pressure of the hydraulic system causes damage of the fan motor, the failure rate of the whole excavator is reduced, and the image and the quality of products are improved is avoided.

In some embodiments, the operation of the excavator's electrical control system in the fan forward mode is as follows:

(1) the vehicle is powered on through the key switch, and the power-on signal port of the controller receives a high-level power-on signal after the vehicle is powered on.

(2) After the power is on, the monitor is powered on, a fan forward rotation mode is selected on the monitor, forward rotation mode information is sent to the controller through the CAN bus, and the controller runs a control mode of the forward rotation mode.

(3) After the power is on, a coil of the first relay is electrified, and a main contact of the first relay is closed; the first port 41 of the controller 4 has no output and the second relay is not energized, its main contacts remain closed. The power input port 40 of the controller 4 is powered. The second port 42 of the controller 4 is not output, the third relay coil is not energized, and the main contact thereof remains open, so that the power input port of the controller 4 cannot be energized through the second path.

(4) In the normal rotation mode, the third port 43 of the controller 4 has no output, the fan reverse rotation valve is not energized, and the oil passage is maintained as a normal rotation oil passage.

(5) After the key switch is flamed out, the coil of the first relay 1 loses power instantly, the main contact is disconnected, the first passage is disconnected, the power input port 40 of the controller 4 loses power, and the controller loses power instantly.

(6) And after flameout, the oil return path continues to enter the system for oil return, and the fan motor is slowly stopped without impact on the motor.

The operation process of the electrical control system of the excavator in the fan reverse rotation mode is as follows:

(1) the vehicle is powered on through the key switch, and a power-on signal port of the controller 4 receives a high-level power-on signal after the vehicle is powered on.

(2) After the power is on, the monitor is powered on, a user CAN select a fan reverse mode on the monitor according to needs, the monitor sends reverse mode information to the controller 4 through the CAN bus, and the controller runs a control mode of the reverse mode.

(3) After power is on, the coil of the first relay 1 is electrified, and the main contact is connected. The first port 41 of the controller 4 outputs a high level, the coil of the second relay 2 is energized, the main contact thereof is opened, and the power input port 40 of the controller cannot be energized through the first path. The second port 42 of the controller 4 outputs high level, the coil of the third relay 3 is electrified, and the main contact is closed, so that the No. 3 power port of the main controller is powered by the second path, and the disconnection of the key switch does not influence the power supply to provide stable current for the controller 4.

(4) In the reverse rotation mode, the third port 43 of the controller 4 outputs a high level, and therefore the fan reverse rotation valve is energized, and the oil passage remains a reverse oil passage; after the engine is started, the fan motor is reversed, thereby driving the fan to reverse.

(5) After the key switch is flamed out, the coil of the first relay 1 loses power instantly, the corresponding switch is disconnected, and the electric equipment of the whole vehicle except the main controller is disconnected.

(6) After the key switch is flamed out, the Br end of the key switch is powered off, the power-on signal port of the controller receives a low-level signal, and the controller 4 continues to output the signal except the third port 43 connected with the fan reversal valve and the fourth port 44 connected with the heat-dissipation pump proportional valve.

(7) At the moment the key switch is turned off, the controller 4 starts timing.

(8) The controller controls the third port 43 of the fan reversing valve to continuously output the high level for 4-8 seconds, so that the oil circuit is continuously in the reverse state for 4-8 seconds, the reverse oil return circuit continuously enters the system for oil return, and the fan motor is slowly stopped within 4-8 seconds without impact on the motor. After the timing is finished, the controller stops the output of all the ports.

The electric control system of the excavator can delay the reversal of the fan for a preset time and then stop the reversal of the fan when flameout is carried out in a reversal mode under the control of the controller through the cooperation of the relays, so that the damage of a fan motor caused by the instantaneous pressure rise of a hydraulic pipeline due to the fact that a reversal valve is suddenly closed and an oil return path forms a closed cavity is avoided, the failure rate of the fan motor is reduced, and the service life of the whole excavator is prolonged; meanwhile, the operation reaction in the forward rotation mode is not influenced, the inconvenience in use caused by unnecessary time delay is avoided, and the timeliness of forward rotation shutdown is improved.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.

The methods and apparatus of the present disclosure may be implemented in a number of ways. For example, the methods and apparatus of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above unless specifically stated otherwise. Further, in some embodiments, the present disclosure may also be embodied as programs recorded in a recording medium, the programs including machine-readable instructions for implementing the methods according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.

Finally, it should be noted that: the above examples are intended only to illustrate the technical solutions of the present disclosure and not to limit them; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will understand that: modifications to the specific embodiments of the disclosure or equivalent substitutions for parts of the technical features may still be made; all such modifications are intended to be included within the scope of the claims of this disclosure without departing from the spirit thereof.

Claims

1. An electrical control system comprising:

the first relay is connected with the switch and is configured to conduct a first path of the power supply under the condition of power supply; in the case of power loss, opening the first path; the power supply is connected with a power supply input port of the controller through a first path, and the first relay is powered on when the switch is turned on;

a second relay configured to open the first path when power is turned on, wherein the second relay is powered when a first port of the controller outputs a high level;

a third relay configured to conduct the second path in the case of power-on; in the case of power loss, opening the second path; the power supply is connected with a power supply input port of the controller through a second path, the first path and the second path are connected between the power supply input port and the power supply in parallel, and the third relay is powered on under the condition that the second port of the controller outputs high level;

a controller configured to:

under the condition that the reverse rotation mode is determined to be executed, outputting a high level at the first port and the second port, and outputting a high level at a third port connected with a reverse rotation valve and a fourth port connected with a heat dissipation pump proportional valve;

under the condition that the on-state signal of the power-on signal port of the controller is determined to be disconnected, timing is started; and stopping outputting high level at the first port, the second port, the third port and the fourth port when the timing reaches a preset time length.

2. The system of claim 1, wherein the controller is further configured to:

in a case where it is determined that the forward rotation mode is performed, the first port, the second port, and the third port have no output, and a high level is output at the fourth port.

3. The system of claim 2, wherein the controller is further configured to:

and under the condition of determining to execute the forward rotation mode, if the conducting signal of the power-on signal port of the controller is disconnected, immediately stopping outputting the high level at the fourth port.

4. The system of claim 1, wherein the predetermined period of time is 4-8 seconds.

5. The system of any of claims 1 to 4, further comprising:

and the monitor is configured to enable a user to select a current operation mode under the condition that the switch is conducted, wherein the operation mode comprises a forward rotation mode and a reverse rotation mode.

6. The system of any of claims 1 to 4, further comprising:

the switch is connected with the power-on signal port of the controller through a switch signal port and is configured to output a high level to the power-on signal port of the controller under the condition of conduction; in the case of disconnection, the output of high level to the power-on signal port of the controller is immediately stopped.

7. The system of any of claims 1 to 4, further comprising:

a power supply connected to the power input port of the controller through a first path and a second path, respectively, and configured to supply power to the controller.

8. An electrical control method comprising:

in the case of determining that the reverse rotation mode is to be performed, preventing the power from being obtained through a first path with the power supply, obtaining the power through a second path with the power supply, and outputting a high level to a third port connected to the reverse rotation valve and a fourth port connected to the heat-dissipating pump proportional valve;

if the flameout is determined to be in the reverse mode, timing is started; and when the timing reaches a preset time, stopping acquiring the electric energy from the second path, and stopping outputting high level to the third port and the fourth port.

9. The method of claim 8, wherein the preventing power from being drawn through a first path with a power source comprises:

outputting a high level through a first port, wherein a second relay is powered on under the condition that the first port outputs the high level, and a first path between a power supply and a controller is disconnected;

and outputting a high level through the second port, wherein the third relay is electrified under the condition that the second port outputs the high level, and a second path between the power supply and the controller is conducted.

10. The method of claim 8, wherein the determining misfire comprises:

determining whether a conducting signal exists at a power-on signal port;

and if the conduction signal of the power-on signal port is disconnected, determining to flameout.

11. The method of claim 8, further comprising:

and under the condition that the forward rotation mode is determined to be executed, preventing the electric energy from being obtained through a second passage between the electric energy source and the power source, obtaining the electric energy through a first passage between the electric energy source and the power source, and outputting a high level to a fourth port connected with the heat dissipation pump proportional valve.

12. The method of claim 11, further comprising:

and in the forward rotation mode, if flameout occurs, the high level output at the fourth port is immediately stopped.

13. The method of claim 11, wherein the preventing power from being drawn through the second path from the power source comprises:

blocking output through a first port, wherein a first path between a power supply and a controller is conducted when a second relay is de-energized when the first port is not outputting;

and blocking output through the second port, wherein the second path between the power supply and the controller is disconnected when the third relay loses power under the condition that the second port does not output the power.

14. The method of any of claims 8 to 13, further comprising:

the current operation mode is determined according to a control signal from the monitor, and comprises a forward rotation mode and a reverse rotation mode.

15. A controller of an electrical control system, comprising:

a memory; and

a processor coupled to the memory, the processor configured to perform the method of any of claims 8 to 14 based on instructions stored in the memory.

16. A computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of any one of claims 8 to 14.

17. An excavator, comprising:

a heat radiation fan configured to rotate to radiate heat;

a fan motor configured to provide power for rotation of the heat dissipation fan;

a reverse valve configured to control reversal of an oil path to and from the fan motor; and

an electrical control system according to any one of claims 1 to 7.