阅读说明：本技术 一种缝纫机电控系统的断电系统和方法 (Power-off system and method of sewing machine electric control system ) 是由 蒋吉峰 双慧 于 2019-10-23 设计创作，主要内容包括：本发明公开了一种缝纫机电控系统的断电系统,包括：断电检测装置,用于在检测出缝纫机的电控系统关闭时,输出第一信号；与断电检测装置连接的控制器,用于在接收到第一信号之后,启用能量消耗装置消耗电控系统中的残余电能,并在电控系统中的残余电能消耗完成之后关闭能量消耗装置；与控制器连接的能量消耗装置。应用本申请的方案,可以有效地对缝纫机电控系统进行断电,避免电解电容的能量消耗过慢的情况。本申请还提供了一种缝纫机电控系统的断电方法,具有相应技术效果。(The invention discloses a power-off system of a sewing machine electric control system, which comprises: the power failure detection device is used for outputting a first signal when detecting that an electric control system of the sewing machine is closed; the controller is connected with the power failure detection device and used for starting the energy consumption device to consume the residual electric energy in the electric control system after receiving the first signal and closing the energy consumption device after the residual electric energy in the electric control system is consumed; an energy consuming device connected to the controller. By applying the scheme of the application, the sewing machine electric control system can be effectively powered off, and the condition that the energy consumption of an electrolytic capacitor is too slow is avoided. The application also provides a power-off method of the sewing machine electric control system, and the power-off method has corresponding technical effects.)

1. The utility model provides a sewing machine electric system's outage system which characterized in that includes:

the power failure detection device is used for outputting a first signal when detecting that an electric control system of the sewing machine is closed;

the controller is connected with the power failure detection device and is used for starting an energy consumption device to consume residual electric energy in the electric control system after receiving the first signal and closing the energy consumption device after the residual electric energy in the electric control system is consumed;

the energy consuming device is connected to the controller.

2. The electrical disconnect system of a sewing machine electrical system of claim 1, wherein the energy consuming device comprises:

the inverter circuit is connected with the controller and the electric control system;

and the motor is connected with the inverter circuit and used for consuming the residual electric energy in the electric control system in a motor strong magnetic mode when the inverter circuit receives a driving signal of the controller.

3. The electrical disconnect system of a sewing machine electrical system of claim 1, wherein the energy consuming device comprises:

the switching circuit is connected with the controller and the electric control system;

and the load is connected with the switching circuit and used for consuming residual electric energy in the electric control system when the controller controls the switching circuit to be conducted.

4. The electrical disconnect system of sewing machine electrical system of claim 3, wherein the load is a cement resistor.

5. The electrical power outage system of the sewing machine electrical control system according to claim 1, characterized in that the controller is specifically configured to:

after receiving the first signal, enabling an energy consumption device to consume the residual electric energy in the electric control system, determining that the residual electric energy consumption in the electric control system is finished after a preset first time period, and turning off the energy consumption device.

6. The power cutoff system of the sewing machine electric control system according to any one of claims 1 to 4, wherein the power cutoff detection means includes:

the alternating voltage detection circuit is used for detecting the alternating input voltage of the rectifying circuit in the electric control system;

and the direct-current voltage detection circuit is used for detecting the direct-current output voltage of the rectifying circuit in the electric control system.

7. The electrical power interruption system of the sewing machine electrical system according to claim 6, wherein the alternating voltage detection circuit is specifically configured to:

detecting alternating current input voltage of a rectifying circuit in the electric control system, and outputting a first alternating current prompt signal when the alternating current input voltage is smaller than a first alternating current lower limit value; when the alternating current input voltage is greater than or equal to the first alternating current lower limit value and less than or equal to the first alternating current upper limit value, outputting a second alternating current prompt signal; when the alternating current input voltage is larger than the first alternating current upper limit value, outputting a third alternating current prompt signal;

the direct-current voltage detection circuit is specifically used for:

detecting the direct current output voltage of a rectifying circuit in the electric control system, and outputting a first direct current prompt signal when the direct current output voltage is smaller than a first direct current lower limit value; when the direct current output voltage is greater than or equal to the first direct current lower limit value and less than or equal to the first direct current upper limit value, outputting a second direct current prompt signal; when the direct current output voltage is larger than the first direct current upper limit value, outputting a third direct current prompt signal;

the controller is specifically configured to: when the first alternating current prompt signal and the second direct current prompt signal are received at the same time, determining that the first signal is received, starting an energy consumption device to consume residual electric energy in the electric control system, and closing the energy consumption device after the residual electric energy in the electric control system is consumed.

8. The electrical disconnect system of a sewing machine electrical system of claim 7, wherein the controller is further configured to:

when the second alternating current prompt signal and the second direct current prompt signal are received at the same time, determining that the electric control system is in a normal operation state; and when the third alternating current prompt signal or the third direct current prompt signal is received, determining that the electric control system is in an abnormal state.

9. A power-off method of an electric control system of a sewing machine is characterized by comprising the following steps:

when detecting that an electric control system of the sewing machine is closed, the power failure detection device outputs a first signal;

the controller enables an energy consumption device to consume residual electric energy in the electric control system after receiving the first signal, and closes the energy consumption device after the residual electric energy consumption in the electric control system is completed.

10. The power-off method of an electric control system of a sewing machine according to claim 9, wherein turning off the power consuming device after the residual power consumption in the electric control system is completed comprises:

determining that the residual electric energy consumption in the electric control system is completed after a preset first time period, and turning off the energy consumption device.

Technical Field

The invention relates to the technical field of sewing machines, in particular to a power-off system and a power-off method for an electric control system of a sewing machine.

Background

The sewing machine controls the mechanical structure of the sewing machine through the electric control system, so that the requirement of the sewing process is met. The electric control system needs to use an electrolytic capacitor with enough capacity, so that the sewing machine can obtain excellent performances of large torque, high rotating speed, quick start and stop and the like. After the sewing machine is used, a worker needs to manually turn off a power switch on the electric control, namely, the electric control system is powered off. Because the capacity of the electrolytic capacitor in the internal circuit of the electric control system is large, the energy of the capacitor can be completely released within 5-10 seconds generally, and the effect of completely closing the internal circuit is achieved.

After the electric control of the existing sewing machine is powered off, the energy of the point-to-point capacitor is released in a way of natural discharge of an internal circuit. Because the energy consumption of the electrolytic capacitor is too slow, the reduction speed of the bus voltage is too slow, the panel and the low-voltage circuit inside the electric control unit can still be in a working state, the shutdown time is too long, and a user often waits until the power is cut off really and then can leave a working post, so that the use experience is influenced. In addition, the energy consumption of the electrolytic capacitor is too slow, the bus voltage slowly drops, and an internal switching power supply circuit may have an abnormal phenomenon of secondary power-on opening, which brings uncertainty to an electric control system.

In summary, how to more effectively power off the electric control system of the sewing machine and avoid the situation that the energy consumption of the electrolytic capacitor is too slow is a technical problem which needs to be solved urgently by the technical personnel in the field at present.

Disclosure of Invention

The invention aims to provide a power-off system and a power-off method for a sewing machine electric control system, which are used for effectively powering off the sewing machine electric control system and avoiding the condition that the energy consumption of an electrolytic capacitor is too slow.

In order to solve the technical problems, the invention provides the following technical scheme:

a power-off system of an electric control system of a sewing machine comprises:

the power failure detection device is used for outputting a first signal when detecting that an electric control system of the sewing machine is closed;

the controller is connected with the power failure detection device and is used for starting an energy consumption device to consume residual electric energy in the electric control system after receiving the first signal and closing the energy consumption device after the residual electric energy in the electric control system is consumed;

the energy consuming device is connected to the controller.

Preferably, the energy consuming device comprises:

the inverter circuit is connected with the controller and the electric control system;

and the motor is connected with the inverter circuit and used for consuming the residual electric energy in the electric control system in a motor strong magnetic mode when the inverter circuit receives a driving signal of the controller.

Preferably, the energy consuming device comprises:

the switching circuit is connected with the controller and the electric control system;

and the load is connected with the switching circuit and used for consuming residual electric energy in the electric control system when the controller controls the switching circuit to be conducted.

Preferably, the load is a cement resistor.

Preferably, the controller is specifically configured to:

after receiving the first signal, enabling an energy consumption device to consume the residual electric energy in the electric control system, determining that the residual electric energy consumption in the electric control system is finished after a preset first time period, and turning off the energy consumption device.

Preferably, the power outage detection apparatus includes:

the alternating voltage detection circuit is used for detecting the alternating input voltage of the rectifying circuit in the electric control system;

and the direct-current voltage detection circuit is used for detecting the direct-current output voltage of the rectifying circuit in the electric control system.

Preferably, the alternating voltage detection circuit is specifically configured to:

detecting alternating current input voltage of a rectifying circuit in the electric control system, and outputting a first alternating current prompt signal when the alternating current input voltage is smaller than a first alternating current lower limit value; when the alternating current input voltage is greater than or equal to the first alternating current lower limit value and less than or equal to the first alternating current upper limit value, outputting a second alternating current prompt signal; when the alternating current input voltage is larger than the first alternating current upper limit value, outputting a third alternating current prompt signal;

the direct-current voltage detection circuit is specifically used for:

detecting the direct current output voltage of a rectifying circuit in the electric control system, and outputting a first direct current prompt signal when the direct current output voltage is smaller than a first direct current lower limit value; when the direct current output voltage is greater than or equal to the first direct current lower limit value and less than or equal to the first direct current upper limit value, outputting a second direct current prompt signal; when the direct current output voltage is larger than the first direct current upper limit value, outputting a third direct current prompt signal;

the controller is specifically configured to: when the first alternating current prompt signal and the second direct current prompt signal are received at the same time, determining that the first signal is received, starting an energy consumption device to consume residual electric energy in the electric control system, and closing the energy consumption device after the residual electric energy in the electric control system is consumed.

Preferably, the controller is further configured to:

when the second alternating current prompt signal and the second direct current prompt signal are received at the same time, determining that the electric control system is in a normal operation state; and when the third alternating current prompt signal or the third direct current prompt signal is received, determining that the electric control system is in an abnormal state.

A power-off method of an electric control system of a sewing machine comprises the following steps:

when detecting that an electric control system of the sewing machine is closed, the power failure detection device outputs a first signal;

the controller enables an energy consumption device to consume residual electric energy in the electric control system after receiving the first signal, and closes the energy consumption device after the residual electric energy consumption in the electric control system is completed.

Preferably, turning off the energy consumption device after the residual electric energy consumption in the electric control system is completed includes:

determining that the residual electric energy consumption in the electric control system is completed after a preset first time period, and turning off the energy consumption device.

By applying the technical scheme provided by the embodiment of the invention, the energy consumption of the electric control system is accelerated through the energy consumption device. Specifically, the power-off detection device outputs a first signal when detecting that the electric control system of the sewing machine is closed, and the controller can determine that the electric control system of the sewing machine is powered off at the moment after receiving the first signal, so that the energy consumption device is started to consume the residual electric energy in the electric control system, and the energy consumption device is closed after the residual electric energy in the electric control system is consumed. The energy consumption device is started when the electric control system is closed, so that the residual electric energy of the electric control system can be released quickly, namely, the scheme of the application can effectively cut off the electric control system of the sewing machine, and the condition that the energy consumption of the electrolytic capacitor is too slow is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a power-off system of an electric control system of a sewing machine according to the present invention;

FIG. 2 is another schematic structural diagram of a power-off system of the electric control system of the sewing machine according to the present invention;

FIG. 3 is a flow chart of an embodiment of the power-off method of the sewing machine electric control system according to the present invention.

Detailed Description

The core of the invention is to provide a power-off system of a sewing machine electric control system, which can effectively power off the sewing machine electric control system and avoid the condition that the energy consumption of an electrolytic capacitor is too slow.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a power-off system of an electric control system of a sewing machine according to the present invention, the power-off system of the electric control system of the sewing machine may include:

the power failure detection device 10 is used for outputting a first signal when detecting that an electric control system of the sewing machine is closed.

The specific form of the power failure detection device 10 can be set and adjusted as required, as long as the state of releasing internal energy after the sewing machine electric control system enters the power failure can be distinguished, that is, when the electric control system of the sewing machine needs to be detected to be closed, a first signal is output to enable the controller 20 to know, and the residual electric energy in the sewing machine electric control system needs to be released immediately at present.

For example, the power-off detection device 10 may be a logic circuit associated with a power switch of an electric control system of the sewing machine, and when a user manually turns off the power switch or the sewing machine automatically triggers the power switch to turn off, the power-off detection device 10 may determine that the electric control system of the sewing machine is turned off, and then output a first signal to the controller 20.

For another example, considering that the voltage on the power supply line of the electronic control system of the sewing machine changes when the electronic control system is turned off, the power failure detection device 10 may also be a power failure detection device 10 based on the voltage detection of the power supply line, and by outputting voltage signals with different magnitudes to the controller 20, the controller 20 may determine whether the first signal is received according to the output of the power failure detection device 10.

And a controller 20 connected to the power outage detection device 10, for enabling the energy consumption device 30 to consume the residual power in the electric control system after receiving the first signal, and for turning off the energy consumption device 30 after the residual power consumption in the electric control system is completed.

An energy consuming device 30 connected to the controller 20.

The specific form of the energy consumption device 30 can also be set and adjusted according to the needs, for example, in a specific embodiment, considering that the sewing machine has the motor 32 and the inverter circuit 31 connected with the motor 32, the energy release for the electric control system can be performed by directly utilizing the motor 32 and the inverter circuit 31, which is beneficial to reducing the implementation cost of the scheme. That is, in one embodiment of the present invention, the energy consumption device 30 may include:

an inverter circuit 31 connected to both the controller 20 and the electric control system;

and the motor 32 connected with the inverter circuit 31 is used for consuming residual electric energy in the electric control system in a strong magnetic mode through the motor 32 when the inverter circuit 31 receives a driving signal of the controller 20.

In the embodiment of fig. 2, the energy consumption device 30 includes an inverter circuit 31 and a motor 32. Specifically, the inverter circuit 31 may be selected as a three-phase full-bridge inverter circuit based on an IGBT commonly used in a sewing machine, and the motor 32 may be selected as a permanent magnet synchronous motor. When the residual electric energy in the electric control system is consumed in a strong magnetic mode of the motor 32, the residual electric energy in the electric control system can be dissipated in a heat energy mode through the IGBT three-phase full-bridge inverter circuit and the permanent magnet synchronous motor.

It should be further noted that in the embodiment of fig. 2, the controller 20 includes the single chip 21 and the high voltage gate driving circuit 22, and the high voltage gate driving circuit 22 is disposed between the single chip 21 and the inverter circuit 31 to realize the voltage level conversion in consideration that the voltage level of the output pin of the single chip 21 does not conform to the voltage level of the control terminal of the IGBT of the inverter circuit 31.

Of course, in other embodiments, other configurations may be used to implement energy consuming device 30. For example, the energy consuming device 30 may include:

a switching circuit connected to both the controller 20 and the electric control system;

and a load connected to the switching circuit for consuming the residual power in the electrical control system when the controller 20 controls the switching circuit to be turned on.

The circuit structure is simple, the control end of the switch circuit is connected with the controller 20, and when the controller 20 controls the switch unit to be conducted, the residual electric energy in the electric control system can be released through the load connected with the switch circuit. The switching circuit can be selected as a common low-cost power switching device, such as an MOS (metal oxide semiconductor) tube and the like, and the specific form of the load can be adjusted according to the requirement, for example, the cement resistor can be suitable for high-power and high-current working occasions, so that the load can be selected as the cement resistor.

By applying the technical scheme provided by the embodiment of the invention, the energy consumption of the electric control system is accelerated by the energy consumption device 30. Specifically, the power-off detection device 10 outputs a first signal when detecting that the electronic control system of the sewing machine is turned off, and the controller 20 can determine that the electronic control system of the sewing machine is powered off at the moment after receiving the first signal, so that the energy consumption device 30 is started to consume the residual electric energy in the electronic control system, and the energy consumption device 30 is turned off after the residual electric energy in the electronic control system is consumed. The energy consumption device 30 is started when the electric control system is closed, so that the residual electric energy of the electric control system can be released quickly, namely, the scheme of the application can effectively cut off the electric control system of the sewing machine, and the condition that the energy consumption of an electrolytic capacitor is too slow is avoided.

In one embodiment of the present invention, the controller 20 is specifically configured to:

after receiving the first signal, the energy consumption device 30 is enabled to consume the residual electric energy in the electronic control system, it is determined that the residual electric energy consumption in the electronic control system is completed after a preset first time period, and the energy consumption device 30 is turned off.

The controller 20 needs to turn off the energy consumption device 30 after the residual electric energy consumption in the electric control system is completed, and the manner for triggering the controller 20 to turn off the energy consumption device 30 can be set and selected according to actual conditions, for example, in this embodiment, after the controller 20 turns on the energy consumption device 30, the controller 20 automatically turns off the energy consumption device 30 after a first period of time. This is to consider that after the first period of time, the residual electric energy in the electric control system is substantially consumed, so that the energy consumption device 30 can be turned off, and the specific value of the first period of time can be set and adjusted in advance through theoretical analysis and in combination with experimental data.

Of course, in other embodiments, there may be other triggering manners, such as when the controller 20 detects that the voltage of the relevant detection point on the power supply line of the electric control system is lower than a certain value after activating the energy consumption device 30, it may determine that the residual electric energy consumption in the electric control system is completed. Specifically, for example, when it is detected that the ac voltage on the live line and the dc voltage at the rear end of the rectifier bridge are both lower than 5V, it may be determined that the residual power consumption in the electronic control system is completed, and the energy consumption device 30 may be turned off.

In one embodiment of the present invention, referring to fig. 2, the power outage detection apparatus 10 includes:

an alternating voltage detection circuit 11 for detecting an alternating input voltage of a rectifier circuit in the electric control system;

and the direct-current voltage detection circuit 12 is used for detecting the direct-current output voltage of the rectifying circuit in the electric control system.

In this embodiment, considering that the original structure of the sewing machine is usually provided with the ac voltage detection circuit 11 for detecting the ac input voltage of the rectifier circuit and the dc voltage detection circuit 12 for detecting the dc output voltage of the rectifier circuit in the electronic control system, the ac voltage detection circuit 11 and the dc voltage detection circuit 12 are directly used to implement the power failure detection device 10 of the present application, which is beneficial to saving the cost.

Further, in an embodiment of the present invention, the ac voltage detecting circuit 11 may be specifically configured to:

detecting alternating current input voltage of a rectifying circuit in an electric control system, and outputting a first alternating current prompt signal when the alternating current input voltage is smaller than a first alternating current lower limit value; when the alternating current input voltage is greater than or equal to the first alternating current lower limit value and less than or equal to the first alternating current upper limit value, outputting a second alternating current prompt signal; when the alternating current input voltage is greater than the first alternating current upper limit value, outputting a third alternating current prompt signal;

the dc voltage detection circuit 12 may be specifically configured to:

detecting the direct current output voltage of a rectifying circuit in the electric control system, and outputting a first direct current prompt signal when the direct current output voltage is smaller than a first direct current lower limit value; when the direct current output voltage is greater than or equal to the first direct current lower limit value and less than or equal to the first direct current upper limit value, outputting a second direct current prompt signal; when the direct current output voltage is greater than the first direct current upper limit value, outputting a third direct current prompt signal;

at this time, the controller 20 is specifically configured to: when the first ac prompt signal and the second dc prompt signal are received at the same time, it is determined that the first signal is received, the energy consumption device 30 is enabled to consume the residual electric energy in the electric control system, and the energy consumption device 30 is turned off after the residual electric energy in the electric control system is consumed.

For convenience of description, it is not assumed that the first ac lower limit value is 90V, the first ac upper limit value is 310V, the first dc lower limit value is 90 × 1.41 to 126.9V, and the first dc upper limit value is 310 × 1.41 to 437.1V. Namely, when the electric control system works normally, the AC input voltage is between 90V and 310V, and the DC output voltage of the rectifying circuit is between 126.9V and 437.1V.

Of course, in other specific scenarios, the voltage levels of the electric control system are different, and the first ac lower limit value, the first ac upper limit value, the first dc lower limit value, and the first dc upper limit value may be adjusted to other values.

When the controller 20 receives the first ac prompting signal and the second dc prompting signal simultaneously, it indicates that the ac input voltage is less than 90V, and the dc output voltage is greater than or equal to 126.9V and less than or equal to 437.1V, which is consistent with the feature when the electronic control system of the sewing machine is just turned off. Namely, after a user turns off a power switch of an electric control system of the sewing machine, the live wire voltage at the front end of the rectifier bridge is rapidly reduced, the alternating current input voltage is smaller than the first alternating current lower limit value in a normal state, the direct current voltage at the rear end of the rectifier bridge is still maintained in a normal range due to the existence of the electrolytic capacitor, and the direct current output voltage is greater than or equal to the first direct current lower limit value and smaller than or equal to the first direct current upper limit value.

Therefore, when the controller 20 receives the first ac prompting signal and the second dc prompting signal at the same time, in this embodiment, the controller 20 may determine that the first signal is received, and the controller 20 may enable the energy consumption device 30 to consume the residual electric energy in the electrical control system. That is, in this embodiment, the first signal is composed of the first ac cue signal and the second dc cue signal.

It should be noted that the ac voltage detecting circuit 11 and the dc voltage detecting circuit 12 do not directly output the detected voltage value to the controller 20, but output the detected voltage value to the controller 20 through the voltage dividing circuit, the current limiting circuit and the filter circuit, so that the voltage level received by the controller 20 meets the voltage level requirement of the pin of the controller 20, which is represented by a low voltage detection signal in fig. 2. In addition, both the ac voltage detection circuit 11 and the dc voltage detection circuit 12 may be provided with an overvoltage protection circuit, so that the detected high voltage is converted into a low voltage, safe and recognizable signal and then output to the controller 20. Since the related circuits are common, they will not be described herein.

In one embodiment of the present invention, the controller 20 is further configured to:

when a second alternating current prompt signal and a second direct current prompt signal are received at the same time, determining that the electric control system is in a normal operation state; and when the third alternating current prompt signal or the third direct current prompt signal is received, determining that the electric control system is in an abnormal state.

In this embodiment, the controller 20 may also determine other states of the electronic control system according to the outputs of the ac voltage detection circuit 11 and the dc voltage detection circuit 12. Specifically, for example, when the ac input voltage is between 90V and 310V, the controller 20 receives the second ac prompting signal, the dc output voltage is between 126.9V and 437.1V, and the controller 20 receives the second dc prompting signal, so that when the second ac prompting signal and the second dc prompting signal are received at the same time, it can be determined that the electronic control system is in a normal operation state.

Correspondingly, when the third ac prompting signal is received, it indicates that the ac input voltage is higher than 310V, which is not in accordance with the normal range, and may be the case where the ac voltage detection circuit 11 is abnormal, the live line voltage is abnormal, or the like. And if the third direct current prompting signal is received, the direct current output voltage is higher than 437.1V, which is not in accordance with the normal range of the direct current output voltage, and the situations such as the abnormality of the direct current voltage detection circuit 12 and the abnormality of the rectifier bridge are possible. Therefore, the controller 20 may determine that the electronic control system is in an abnormal state when receiving the third ac prompting signal or the third dc prompting signal.

Corresponding to the above method embodiment, the embodiment of the invention also provides a power-off method of the sewing machine electric control system, which can be correspondingly referred to with the above.

Referring to fig. 3, an implementation flow chart of a power-off method of an electric control system of a sewing machine in the invention is shown, and includes:

step S101: when detecting that an electric control system of the sewing machine is closed, the power failure detection device outputs a first signal;

step S102: the controller enables the energy consumption device to consume the residual electric energy in the electric control system after receiving the first signal, and closes the energy consumption device after the residual electric energy consumption in the electric control system is completed.

In one embodiment of the invention, an energy consuming device comprises:

the inverter circuit is connected with the controller and the electric control system;

and the motor is connected with the inverter circuit and used for consuming residual electric energy in the electric control system in a motor strong magnetic mode when the inverter circuit receives a driving signal of the controller.

In one embodiment of the invention, an energy consuming device comprises:

the switching circuit is connected with the controller and the electric control system;

and the load is connected with the switching circuit and used for consuming residual electric energy in the electric control system when the controller controls the switching circuit to be conducted.

In an embodiment of the present invention, the turning off the energy consumption device after the residual electric energy consumption in the electronic control system in step S102 is completed may specifically be:

after a preset first time period, it is determined that the residual electric energy consumption in the electric control system is completed, and the energy consumption device is turned off.

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

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The principle and the implementation of the present invention are explained in the present application by using specific examples, and the above description of the embodiments is only used to help understanding the technical solution and the core idea of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.