CN112269076B - Compressor start detection device and method - Google Patents
Compressor start detection device and method Download PDFInfo
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- CN112269076B CN112269076B CN202011052352.3A CN202011052352A CN112269076B CN 112269076 B CN112269076 B CN 112269076B CN 202011052352 A CN202011052352 A CN 202011052352A CN 112269076 B CN112269076 B CN 112269076B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
Abstract
The invention provides a compressor start detection device and a method, wherein the device comprises: the device comprises a first connecting module, a second connecting module, a charging and discharging module and a filtering module; the first connection module is used for connecting the charge-discharge module with the power supply system when the power supply system inputs current so as to charge the charge-discharge module through the power supply system; the first connection module is also used for cutting off the electric connection between the charge-discharge module and the power supply system when the power supply system stops inputting current so as to enable the charge-discharge module to release electric energy; the filtering module is used for carrying out filtering treatment on the current transmitted to the charging and discharging module; the second connection module is used for connecting the charge-discharge module with the controller when the power supply system inputs current, so that the controller detects the voltage values at the two ends of the charge-discharge module, and after the controller detects the voltage values at the two ends of the charge-discharge module, the controller is disconnected from the charge-discharge module. The scheme can judge whether the compressor can be started.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a device and a method for detecting the starting of a compressor.
Background
The compressor is a driven fluid machine that lifts low pressure gas to high pressure gas and is the heart of the refrigeration system. However, the compressor is started immediately after the compressor is stopped, so that the output torque of the compressor motor is insufficient and the starting operation cannot be completed.
For example, chinese patent application No. CN202010066857.9 discloses a non-contact three-phase current detection system, which realizes detection of three-phase current in an inverter control system, but does not disclose how to determine whether the compressor can be started based on the three-phase current when the compressor is started.
At present, the prior art does not disclose how to determine whether the compressor is capable of a start-up operation when the compressor is started. Accordingly, it is desirable to provide a solution that can determine whether the compressor can be started.
Disclosure of Invention
The invention provides a compressor start detection device and a method, which can judge whether a compressor can be started or not.
In a first aspect, an embodiment of the present invention provides a compressor start detection apparatus, including: the device comprises a first connecting module, a second connecting module, a charging and discharging module and a filtering module; wherein, the liquid crystal display device comprises a liquid crystal display device,
the current input end of the filtering module is connected with an external power supply system, and the current output end of the filtering module is connected with the current output end of the charging and discharging module;
the current input end of the first connecting module is connected with the power supply system, the current output end of the first connecting module is connected with the current input end of the charging and discharging module, and the current output end of the charging and discharging module is grounded;
the current input end of the second connecting module is connected with an external controller, and the current output end of the second connecting module is connected with the filtering module;
the first connection module is used for connecting the charge-discharge module with the power supply system when the power supply system inputs current so as to charge the charge-discharge module through the power supply system; when the power supply system stops inputting current, the electric connection between the charge and discharge module and the power supply system is cut off, so that the charge and discharge module releases electric energy;
the filtering module is used for filtering the current which is transmitted to the charging and discharging module;
the second connection module is used for connecting the charge-discharge module with the controller when the power supply system inputs current, so that the controller detects the voltage values at the two ends of the charge-discharge module, and cuts off the electric connection between the controller and the charge-discharge module after the controller detects the voltage values at the two ends of the charge-discharge module.
In one possible design, the charge-discharge module includes a charge unit and a discharge unit;
the current input end of the charging unit is connected with the current input end of the discharging unit, and the current output end of the charging unit and the current output end of the discharging unit are grounded;
when the difference between the voltage of the current input end of the charging unit and the voltage of the current output end of the charging unit is smaller than a preset fluctuation range, the discharging unit releases the electric energy stored by the charging unit.
In one possible design, when the first connection module comprises a first diode,
the positive electrode of the first diode is connected with the power supply system, and the negative electrode of the first diode is connected with the current input end of the charge-discharge module.
In one possible design, when the second connection module comprises a second diode,
the negative pole of the second diode is connected with the filtering module, and the positive pole of the second diode is connected with the controller.
In one possible design, when the first connection module comprises a first electromagnetic induction switch,
when the first electromagnetic induction switch inputs current to the power supply system, the first electromagnetic induction switch is switched to a closed state so as to connect the charge and discharge module with the power supply system; when the power supply system stops inputting current, the power supply system is switched to an off state so as to cut off the electric connection between the charging and discharging module and the power supply system.
In one possible design, when the second connection module comprises a second electromagnetic induction switch,
the second electromagnetic induction switch is switched to a closed state when the power supply system inputs current through the controller and the controller inputs current, so that the charge and discharge module is connected with the controller; and when the power supply system stops inputting current or the controller detects that the voltage values at the two ends of the charge and discharge module stop inputting current, switching to an off state so as to cut off the electric connection between the controller and the filter module.
In one possible design, when the filter module includes a first resistor and a first capacitor,
the current input end of the first resistor is connected with the power supply system, the current output end of the first resistor is respectively connected with the controller and the current input end of the first capacitor, and the current output end of the first capacitor is grounded.
In one possible design, the compressor start detection device further includes: a current limiting module;
the current input end of the current limiting module is connected with the power supply system, and the current output end of the current limiting module is connected with the current input end of the first connecting module;
and the current limiting module is used for limiting the current which is transmitted to the charging and discharging module.
In one possible design, the current limiting module includes a second resistor.
In a second aspect, an embodiment of the present invention further provides a method for detecting a start of a compressor based on the above first aspect or any possible implementation manner of the first aspect, including:
when an external power supply system inputs a current, performing:
connecting a charging and discharging module with the power supply system by utilizing a first connecting module so as to charge the charging and discharging module through the power supply system;
the current transmitted to the charge-discharge module is subjected to filtering treatment by utilizing a filtering module;
the charge and discharge module is connected with the controller by a second connection module, so that an external controller detects voltage values at two ends of the charge and discharge module, and after the controller detects the voltage values at two ends of the charge and discharge module, the controller is disconnected from the charge and discharge module;
when an external power supply system stops inputting current, performing:
and cutting off the electric connection between the charge and discharge module and the power supply system by using the first connection module so as to enable the charge and discharge module to release electric energy.
According to the technical scheme, when the first connecting module is disconnected with the power supply system and the charging and discharging module, the charging and discharging module releases electric energy; when the first connecting module connects the power supply system with the charge and discharge module, the charge and discharge module charges, and the second connecting module connects the charge and discharge module with the controller, so that the controller detects the voltage values at two ends of the charge and discharge module, and after the controller detects the voltage values, the controller cuts off the electric connection between the controller and the charge and discharge module. According to the charging and discharging module, the controller is disconnected from the charging module when the charging and discharging module is charged, so that the influence of voltage division of the controller on the charging module is avoided, the voltage values at the two ends of the charging and discharging module can be consistent with the voltage value of the power supply system, and therefore the controller can judge whether the compressor can be started or not according to the voltage values detected at the two ends of the charging and discharging module.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a compressor start detection device according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of another compressor start detection device provided in one embodiment of the present invention;
FIG. 3 is a schematic view of yet another compressor start detection device provided in accordance with one embodiment of the present invention;
FIG. 4 is a schematic view of yet another compressor start detection device provided in accordance with one embodiment of the present invention;
FIG. 5 is a schematic diagram of a compressor start detection circuit according to one embodiment of the present invention;
fig. 6 is a flowchart of a method for detecting start-up of a compressor according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present invention are within the scope of protection of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a compressor start detection apparatus, including: a first connection module 101, a second connection module 102, a charge-discharge module 103, and a filter module 104; wherein, the liquid crystal display device comprises a liquid crystal display device,
the current input end of the filtering module 104 is connected with an external power supply system, and the current output end of the filtering module 104 is connected with the current output end of the charging and discharging module 104;
the current input end of the first connection module 101 is connected with a power supply system, the current output end of the first connection module 101 is connected with the current input end of the charge-discharge module 103, and the current output end of the charge-discharge module 103 is grounded;
the current input end of the second connection module 102 is connected with an external controller, and the current output end of the second connection module 102 is connected with the filtering module 104;
the first connection module 101 is configured to connect the charge-discharge module 104 with the power supply system when the power supply system inputs current, so as to charge the charge-discharge module 104 through the power supply system; when the power supply system stops inputting current, the electric connection between the charge-discharge module 104 and the power supply system is cut off, so that the charge-discharge module 104 releases electric energy;
a filtering module 104, configured to perform filtering processing on the current supplied to the charge/discharge module 103;
the second connection module 102 is configured to connect the charge and discharge module 103 to the controller when the power supply system inputs a current, so that the controller detects voltage values at two ends of the charge and discharge module 103, and cut off the electrical connection between the controller and the charge and discharge module 103 after the controller detects the voltage values at two ends of the charge and discharge module 103.
In the embodiment of the invention, when the first connection module 101 disconnects the power supply system from the charge-discharge module 103, the charge-discharge module 103 releases electric energy; when the first connection module 101 connects the power supply system with the charge and discharge module 103, the charge and discharge module 103 charges, and the second connection module 102 connects the charge and discharge module 103 with the controller, so that the controller detects the voltage values at both ends of the charge and discharge module 103, and after the controller detects the voltage values, the controller cuts off the electrical connection between the controller and the charge and discharge module 103. According to the charging and discharging module, the controller is disconnected from the charging module when the charging and discharging module is charged, so that the influence of voltage division of the controller on the charging module is avoided, the voltage values at the two ends of the charging and discharging module can be consistent with the voltage value of the power supply system, and therefore the controller can judge whether the compressor can be started or not according to the voltage values detected at the two ends of the charging and discharging module.
It should be noted that, in the embodiment of the present invention, after the controller detects the voltage values at the two ends of the charge-discharge module, the discharge time of the charge-discharge module is calculated according to a first formula, where the first formula is used to characterize the relationship between the voltage values at the two ends of the charge-discharge module and the discharge time. After the first connecting module is disconnected with the power supply system and the charging and discharging module, the charging and discharging module releases electric energy, so that the discharging time of the charging and discharging module is the time of stopping the compressor. The first formula is:
t＝R·C·Ln(E/E t )
wherein t is used for representing the time of stopping the compressor, R is used for representing the resistance value of a discharge unit in the charge-discharge module, C is used for representing the capacitance value of the charge unit in the charge-discharge module, E is used for representing the theoretical voltage at two ends of the charge-discharge module, E t The method is used for representing the voltage values of two ends of the charging and discharging module at the moment t.
It should be noted that in the embodiment of the present invention, the controller may be, for example, a microcontroller unit (MCU), and the MCU chip has an integrated analog op-amp function, and the MCU chip may be implemented by a software function algorithm, that is, the MCU chip may be used to form an integral amplifying circuit by using a relevant capacitor and a resistor, so as to directly detect three-phase inversion current parameters, and an external op-amp component current detection conversion circuit is not required to perform current signal conversion, thereby reducing the space of the driving board and reducing the production cost. When the charge-discharge module is connected with the power supply system for charging, the MCU chip is used as a virtual load, so that the voltage values at the two ends of the charge-discharge module cannot reach the theoretical capacitance value, that is, the voltage values at the two ends of the charge-discharge module are different from the power supply voltage of the power supply system. Therefore, when the MCU chip calculates the discharge time of the charge-discharge module by using the first formula, the obtained discharge time is inaccurate. After the voltage values at the two ends of the charge and discharge module are detected by the controller through the second connection module, the charge and discharge module is disconnected from the controller, so that the voltage values at the two ends of the charge and discharge module are identical to the power supply voltage of the power supply system, namely, the theoretical value is reached, and the discharge time of the charge and discharge module is more accurate.
In one embodiment of the present invention, based on the compressor start detection device shown in fig. 1, as shown in fig. 2, the charge and discharge module 103 includes a charge unit 1031 and a discharge unit 1032;
the current input end of the charging unit 1031 is connected with the current input end of the discharging unit 1032, and the current output end of the charging unit 1031 and the current output end of the discharging unit 1032 are grounded;
when the difference between the voltage of the current input terminal of the charging unit 1031 and the voltage of the current output terminal of the charging unit 1031 is smaller than the preset fluctuation range, the discharging unit 1032 discharges the electric energy stored by the charging unit 1031.
In the embodiment of the present invention, the charging unit 1031 in the charging and discharging module 103 is used for charging when connected to the power supply system, the discharging unit 1032 is used for discharging the charging unit 1031, and the charging speed of the charging unit 1032 is greater than or equal to the discharging speed. When the difference between the voltage values at the two ends of the charging unit 1031 and the voltage at the current output end is smaller than the preset fluctuation range, the charging unit 1032 releases the electric energy stored by the charging module.
It is understood that the charging unit 1031 may be, for example, an electrolytic capacitor, and may be any other charging unit having the same function. The discharge unit 1032 may be, for example, a resistor, and the resistance value of the resistor is large, thereby ensuring a long time for discharging the electric energy from the electrolytic capacitor. If the resistance is too small, the current in the circuit is larger, and the electric energy release of the charge-discharge module is shorter, so that the discharge time of the charge-discharge module can be negatively influenced in the subsequent judgment. In addition, the time for releasing the electric energy by the charge-discharge module can be adjusted by adjusting the resistance value, so that the expansibility of the compressor starting detection device is stronger.
In one embodiment of the present invention, based on the compressor start detection device shown in fig. 1, when the first connection module 101 includes the first diode,
the positive pole of the first diode is connected with the power supply system, and the negative pole of the first diode is connected with the current input end of the charge-discharge module 104.
In the embodiment of the present invention, when the first connection module 101 is a first diode, the diode is turned on due to the unidirectional conductivity of the diode, that is, when the anode and the cathode of the diode apply a forward voltage; when reverse voltages are applied to the anode and cathode of the diode, the diode is turned off, so the diode can control the electrical connection between the power supply system and the charge and discharge module 103.
In one embodiment of the present invention, based on the compressor start detection device shown in fig. 1, when the second connection module 102 includes the second diode,
the cathode of the second diode is connected with the filter module 104, and the anode of the second diode is connected with the controller.
In the embodiment of the present invention, when the second connection module 102 is the first diode, the virtual load of the controller can be ensured not to affect the charging of the charging and discharging module by using the reverse cut-off capability of the diode, and the voltage values at the two ends of the charging and discharging module after full charge are the same as the voltage value of the power supply system, that is, the voltage values at the two ends of the charging and discharging module after full charge are the theoretical voltage values. Therefore, the result obtained by calculating the discharge time of the charge-discharge module later is more accurate.
In one embodiment of the present invention, based on the compressor start detection device shown in fig. 1, when the first connection module 101 includes the first electromagnetic induction switch,
when a current is input into the power supply system, the first electromagnetic induction switch is switched to a closed state so as to connect the charge and discharge module 103 with the power supply system; when the power supply system stops inputting current, it is switched to an off state to cut off the electrical connection between the charge and discharge module 103 and the power supply system.
In the embodiment of the invention, when the first connection module 101 comprises a first electromagnetic induction switch, and when the power supply system outputs current, an electromagnet in the first electromagnetic induction switch generates a magnetic field, and the electromagnetic switch is attracted, so that the power supply system is connected with the charging and discharging module, and the charging module charges; when the power supply system stops outputting current, the magnetic field of the electromagnet in the first electromagnetic induction switch disappears, and the electromagnetic switch cannot be attracted continuously, so that the electric connection between the power supply system and the charging and discharging module is disconnected.
In one embodiment of the present invention, based on the compressor start detection device shown in fig. 1, when the second connection module 102 includes the second electromagnetic induction switch,
the second electromagnetic induction switch is switched to a closed state when the power supply system inputs current through the controller and the controller inputs current, so as to connect the charge and discharge module 103 with the controller; when the controller stops inputting current or the controller detects that the voltage value at two ends of the charge and discharge module 103 stops inputting current, the controller is switched to an off state to cut off the electric connection between the controller and the charge and discharge module 103.
In the embodiment of the invention, when the first connection module 102 includes the second electromagnetic induction switch, the electromagnet in the second electromagnetic switch generates a magnetic field through the current input by the controller, the electromagnetic switch is attracted, so that the charge-discharge module is connected with the controller, the controller detects the voltage at two ends of the charge-discharge module, and stops inputting the current after detecting the voltage value, the electromagnetic switch is disconnected, so that the electric connection between the controller and the charge-discharge module is disconnected, the charge-discharge module is charged, and the voltage value at two ends of the charge-discharge module after full charge is the same as the voltage value of the power supply system.
In one embodiment of the present invention, based on the compressor start detection device shown in fig. 1, as shown in fig. 3, when the filter module 104 includes the first resistor 1041 and the first capacitor 1042,
the current input end of the first resistor 1041 is connected with the power supply system, the current output end of the first resistor 1041 is respectively connected with the current input ends of the controller and the first capacitor 1042, and the current output end of the first capacitor 1042 is grounded.
In the embodiment of the present invention, the first capacitor 1042 in the filtering module 104 has the characteristic of "blocking direct-current and energy-storing, so that after the power supply system is connected with the charging and discharging module, the alternating current component in the current input to the charging and discharging module by the power supply system can be filtered, the direct current component is reserved, and the influence of the pulsating current on the circuit is reduced, so that the performance of the compressor starting detection device is more stable.
It is understood that in the embodiment of the present invention, the filtering module may be, for example, a pi-type RC filtering circuit, a pi-type LC filtering circuit, and an electronic filter circuit.
In one embodiment of the present invention, based on the compressor start detection device shown in fig. 1, as shown in fig. 4, the compressor start detection device further includes: a current limiting module 401;
the current input end of the current limiting module 401 is connected with a power supply system, and the current output end of the current limiting module 401 is connected with the current input end of the first connecting module 101;
the current limiting module 401 is configured to perform a current limiting process on the current supplied to the charge/discharge module 103.
In the embodiment of the present invention, the current limiting module 401 is configured to limit the current input by the power supply system after the power supply system is connected to the charging module. The Xu Duoyuan devices have the limitation of the maximum input current, that is, the input current of the components is too large, so that the components cannot work normally, and even the components are burnt out. Therefore, the current limiting module is used as a protective resistor to protect each component in the compressor starting detection device, and large impact current is prevented after the power supply system is connected with the charging and discharging module, so that damage to the components caused by overlarge current is avoided.
In one embodiment of the present invention, based on the compressor start detection device shown in fig. 4, the current limiting module 401 includes a second resistor.
In the embodiment of the present invention, when the current limiting module 401 includes the second resistor, the charging time of the charging and discharging module may be adjusted by adjusting the resistance value of the second resistor. The current limiting module 401 may of course be other devices with the same function.
In one embodiment of the present invention, as shown in fig. 5, when the first connection module 101 is a diode VD11, the second connection module 102 is a diode VD10, the charging unit 1031 in the charging and discharging module 103 is a capacitor C12, the discharging unit 1032 is a resistor R40 and a resistor R42, the filtering module 104 is a resistor R36 and a capacitor C11, and the current limiting module 401 is a resistor R35, the current input end of the resistor R35 is connected to an external power supply system (3.3V), the current output end of the resistor R35 is connected to the current input end of the resistor R36 and the positive electrode of the diode VD11, the negative electrode of the diode VD11 is connected to the current input end of the resistor R40 and the current input end of the capacitor C12, the current output end of the resistor R40 is connected to the current input end of the resistor R42, the current output end of the resistor R36 is connected to the negative electrode of the diode VD10 and the current input end of the capacitor C11, and the positive electrode of the diode R10 is connected to an external controller (5 DELAY).
The configuration shown in the embodiment of the present invention does not constitute a specific limitation on the compressor start detection device. In other embodiments of the invention, the compressor start detection device may include more or fewer components than shown, or certain components may be combined, certain components may be split, or different arrangements of components may be provided. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
The content of information interaction and execution process between the modules in the device is based on the same conception as the embodiment of the method of the present invention, and specific content can be referred to the description in the embodiment of the method of the present invention, which is not repeated here.
As shown in fig. 6, an embodiment of the present invention provides a method for detecting a start of a compressor based on the device for detecting a start of a compressor according to any one of the above embodiments, which may include the steps of:
step 601: when an external power supply system inputs current, the charging and discharging module is connected with the power supply system by utilizing the first connecting module so as to charge the charging and discharging module through the power supply system.
For example, in this step, when the first connection module is a diode, the anode of the diode is connected to the power supply system, and the cathode of the diode is connected to the current input terminal of the charge/discharge module. And when a forward voltage is applied to the diode, the diode is conducted, so that the power supply system is connected with the charging and discharging module, and the charging and discharging module charges.
For another example, in this step, when the first connection module is an electromagnetic induction switch, the electromagnet in the electromagnetic induction switch generates a magnetic field, and the electromagnetic switch is attracted, so that the power supply system is connected with the charging and discharging module, and the charging and discharging module charges.
Step 602: and filtering the current supplied to the charge-discharge module by using a filtering module.
For example, in this step, the filtering module includes a first resistor and a first capacitor, where a current input end of the first resistor is connected to the power supply system, a current output end of the first resistor is connected to the current input ends of the controller and the first capacitor, respectively, and a current output end of the first capacitor is grounded. The filtering module can filter alternating current components in the output current of the power supply system and keep direct current components.
Step 603: and the second connecting module is used for connecting the charge and discharge module with the controller so that the external controller detects the voltage values at the two ends of the charge and discharge module, and after the controller detects the voltage values at the two ends of the charge and discharge module, the controller is disconnected from the charge and discharge module.
For example, in this step, when the second connection module is a diode, the cathode of the diode is connected to the filter module, and the anode of the diode is connected to the controller. By utilizing the reverse cut-off capability of the diode, the virtual load of the controller can be ensured not to influence the charging of the charging and discharging module, so that the voltage value at two ends of the fully charged charging and discharging module is the same as the voltage value of the power supply system, namely the theoretical value.
For another example, in this step, when the second connection module is an electromagnetic induction switch, the electromagnetic field in the second electromagnetic switch generates a magnetic field according to the current input by the controller, and the electromagnetic switch is attracted, so that the charge-discharge module is connected with the controller, the controller detects the voltage at two ends of the charge-discharge module, and after detecting the voltage value, the controller stops inputting the current, so that the electromagnetic switch is disconnected, and the electrical connection between the controller and the charge-discharge module is disconnected, so that the voltage at two ends of the charge-discharge module after full charge is the same as the voltage value of the power supply system.
Step 604: when the external power supply system stops inputting current, the first connecting module is utilized to cut off the electric connection between the charge and discharge module and the power supply system, so that the charge and discharge module releases electric energy.
In this step, in the foregoing example, when the first connection module is an electromagnetic induction switch, the diode is turned off when the reverse voltage is applied to the anode and the cathode of the diode, and thus the diode disconnects the electrical connection between the power supply system and the charge and discharge module.
In this step, in the foregoing example, when the first connection module is an electromagnetic induction switch, and when the power supply system stops outputting current, the magnetic field in the first electromagnetic induction switch disappears, and the electromagnetic switch cannot be continuously attracted, so that the electrical connection between the power supply system and the charge-discharge module is disconnected.
It should be noted that not all the steps and modules in the above flowcharts and the system configuration diagrams are necessary, and some steps or modules may be omitted according to actual needs. The execution sequence of the steps is not fixed and can be adjusted as required. The system structure described in the above embodiments may be a physical structure or a logical structure, that is, some modules may be implemented by the same physical entity, or some modules may be implemented by multiple physical entities, or may be implemented jointly by some components in multiple independent devices.
In the above embodiments, the hardware module may be mechanically or electrically implemented. For example, a hardware module may include permanently dedicated circuitry or logic (e.g., a dedicated processor, FPGA, or ASIC) to perform the corresponding operations. The hardware modules may also include programmable logic or circuitry (e.g., a general-purpose processor or other programmable processor) that may be temporarily configured by software to perform the corresponding operations. The particular implementation (mechanical, or dedicated permanent, or temporarily set) may be determined based on cost and time considerations.
While the invention has been illustrated and described in detail in the drawings and in the preferred embodiments, the invention is not limited to the disclosed embodiments, and it will be appreciated by those skilled in the art that the code audits of the various embodiments described above may be combined to produce further embodiments of the invention, which are also within the scope of the invention.
Claims (10)
1. Compressor start-up detection device, characterized by includes: the device comprises a first connecting module, a second connecting module, a charging and discharging module and a filtering module; wherein, the liquid crystal display device comprises a liquid crystal display device,
the current input end of the filtering module is connected with an external power supply system, and the current output end of the filtering module is connected with the current output end of the charging and discharging module;
the current input end of the first connecting module is connected with the power supply system, the current output end of the first connecting module is connected with the current input end of the charging and discharging module, and the current output end of the charging and discharging module is grounded;
the current input end of the second connecting module is connected with an external controller, and the current output end of the second connecting module is connected with the filtering module;
the first connection module is used for connecting the charge-discharge module with the power supply system when the power supply system inputs current so as to charge the charge-discharge module through the power supply system; when the power supply system stops inputting current, the electric connection between the charge and discharge module and the power supply system is cut off, so that the charge and discharge module releases electric energy;
the filtering module is used for filtering the current which is transmitted to the charging and discharging module;
the second connection module is used for connecting the charge-discharge module with the controller when the power supply system inputs current, so that the controller detects the voltage values at the two ends of the charge-discharge module, and cuts off the electric connection between the controller and the charge-discharge module after the controller detects the voltage values at the two ends of the charge-discharge module.
2. The compressor start-up detection device according to claim 1, wherein the charge-discharge module includes a charge unit and a discharge unit;
the current input end of the charging unit is connected with the current input end of the discharging unit, and the current output end of the charging unit and the current output end of the discharging unit are grounded;
when the difference between the voltage of the current input end of the charging unit and the voltage of the current output end of the charging unit is smaller than a preset fluctuation range, the discharging unit releases the electric energy stored by the charging unit.
3. A compressor start-up detection apparatus according to claim 1, wherein,
when the first connection module comprises a first diode,
the positive electrode of the first diode is connected with the power supply system, and the negative electrode of the first diode is connected with the current input end of the charge-discharge module.
4. A compressor start-up detection apparatus according to claim 1, wherein,
when the second connection module comprises a second diode,
the negative pole of the second diode is connected with the filtering module, and the positive pole of the second diode is connected with the controller.
5. A compressor start-up detection apparatus according to claim 1, wherein,
when the first connection module comprises a first electromagnetic induction switch,
when the first electromagnetic induction switch inputs current to the power supply system, the first electromagnetic induction switch is switched to a closed state so as to connect the charge and discharge module with the power supply system; when the power supply system stops inputting current, the power supply system is switched to an off state so as to cut off the electric connection between the charging and discharging module and the power supply system.
6. A compressor start-up detection apparatus according to claim 1, wherein,
when the second connection module comprises a second electromagnetic induction switch,
the second electromagnetic induction switch is switched to a closed state when the power supply system inputs current through the controller and the controller inputs current, so that the charge and discharge module is connected with the controller; and when the power supply system stops inputting current or the controller detects that the voltage values at the two ends of the charge and discharge module stop inputting current, switching to an off state so as to cut off the electric connection between the controller and the charge and discharge module.
7. A compressor start-up detection apparatus according to claim 1, wherein,
when the filter module comprises a first resistor and a first capacitor,
the current input end of the first resistor is connected with the power supply system, the current output end of the first resistor is respectively connected with the controller and the current input end of the first capacitor, and the current output end of the first capacitor is grounded.
8. The compressor start-up detection device according to any one of claims 1 to 7, further comprising: a current limiting module;
the current input end of the current limiting module is connected with the power supply system, and the current output end of the current limiting module is connected with the current input end of the first connecting module;
and the current limiting module is used for limiting the current which is transmitted to the charging and discharging module.
9. A compressor start-up detection apparatus according to claim 8, wherein,
the current limiting module includes a second resistor.
10. A compressor start detection method based on the compressor start detection device according to any one of claims 1 to 8, characterized by comprising:
when an external power supply system inputs a current, performing:
connecting a charging and discharging module with the power supply system by utilizing a first connecting module so as to charge the charging and discharging module through the power supply system;
the current transmitted to the charge-discharge module is subjected to filtering treatment by utilizing a filtering module;
the charge and discharge module is connected with the controller by a second connection module, so that an external controller detects voltage values at two ends of the charge and discharge module, and after the controller detects the voltage values at two ends of the charge and discharge module, the controller is disconnected from the charge and discharge module;
when an external power supply system stops inputting current, performing:
and cutting off the electric connection between the charge and discharge module and the power supply system by using the first connection module so as to enable the charge and discharge module to release electric energy.
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