CN113630050B - Generator and control circuit thereof - Google Patents
Generator and control circuit thereof Download PDFInfo
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- CN113630050B CN113630050B CN202110800795.4A CN202110800795A CN113630050B CN 113630050 B CN113630050 B CN 113630050B CN 202110800795 A CN202110800795 A CN 202110800795A CN 113630050 B CN113630050 B CN 113630050B
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- 238000001514 detection method Methods 0.000 claims abstract description 118
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 38
- 238000004804 winding Methods 0.000 claims abstract description 25
- 230000011664 signaling Effects 0.000 claims abstract description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 118
- 239000003990 capacitor Substances 0.000 claims description 77
- 238000005070 sampling Methods 0.000 claims description 72
- 239000000523 sample Substances 0.000 claims description 17
- 239000007789 gas Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000004992 fission Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/008—Arrangements for controlling electric generators for the purpose of obtaining a desired output wherein the generator is controlled by the requirements of the prime mover
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The embodiment of the invention provides a generator and a control circuit thereof, wherein the control circuit of the generator comprises: the rectification circuit, the voltage stabilizing circuit, the temperature detection circuit, the output circuit and the controller are integrated on a circuit board and are arranged in the generator; the rectification circuit is used for converting alternating current generated by the winding into direct current; the voltage stabilizing circuit is used for converting the unstable direct current output by the rectifying circuit into stable direct current; the temperature detection circuit is used for detecting the temperature of the circuit board and generating a temperature detection signal according to the temperature of the circuit board; the output circuit is used for providing voltage for a load; and the controller is used for generating a first control signal according to the temperature detection signal and controlling the output circuit according to the first control signal. Therefore, the circuit can ensure the stability, reliability and safety of the generator.
Description
Technical Field
The invention relates to the technical field of generators, in particular to a control circuit of a generator and the generator with the control circuit.
Background
A generator refers to a mechanical device that converts other forms of energy into electrical energy. For example, it may be driven by a water turbine, steam turbine, diesel engine, belt conveyor or other power machine to convert energy from water flow, gas flow, fuel combustion, belts or nuclear fission into mechanical energy for transmission to an electrical generator, which in turn converts the energy into electrical energy.
Therefore, it is important that the generator be able to operate stably, reliably, and safely.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
To this end, a first object of the present invention is to propose a control circuit for a generator, which is able to guarantee the stability, reliability and safety of the generator.
A second object of the invention is to propose a generator.
To achieve the above object, an embodiment of a first aspect of the present invention provides a control circuit of a generator, including: the power generator comprises a rectifying circuit, a voltage stabilizing circuit, a temperature detection circuit, an output circuit and a controller, wherein the rectifying circuit, the voltage stabilizing circuit, the temperature detection circuit, the output circuit and the controller are integrated on a circuit board, and the circuit board is arranged in the generator; one end of the rectifying circuit is connected with a winding of the generator and is used for converting alternating current generated by the winding into direct current; one end of the voltage stabilizing circuit is connected with the other end of the rectifying circuit, and the other end of the voltage stabilizing circuit is connected with the first end of the temperature protection circuit and is used for converting unstable direct current output by the rectifying circuit into stable direct current; the first end of the temperature detection circuit is connected with the other end of the voltage stabilizing circuit, the second end of the temperature detection circuit is connected with the first end of the controller, and the third end of the temperature detection circuit is connected with the second end of the controller and is used for detecting the temperature of the circuit board and generating a temperature detection signal according to the temperature of the circuit board; the first end of the output circuit is connected with the fourth end of the temperature detection circuit, and the second end of the output circuit is connected with the third end of the controller and is used for providing voltage for a load; the controller is used for generating a first control signal according to the temperature detection signal and controlling the output circuit according to the first control signal.
The control circuit of the generator comprises a rectifying circuit, a voltage stabilizing circuit, a temperature detecting circuit, an output circuit and a controller, wherein the rectifying circuit, the voltage stabilizing circuit, the temperature detecting circuit, the output circuit and the controller are integrated on a circuit board, and the circuit board is arranged in the generator; one end of the rectifying circuit is connected with a winding of the generator and is used for converting alternating current generated by the winding into direct current; one end of the voltage stabilizing circuit is connected with the other end of the rectifying circuit, and the other end of the voltage stabilizing circuit is connected with the first end of the temperature protection circuit and is used for converting unstable direct current output by the rectifying circuit into stable direct current; the first end of the temperature detection circuit is connected with the other end of the voltage stabilizing circuit, the second end of the temperature detection circuit is connected with the first end of the controller, and the third end of the temperature detection circuit is connected with the second end of the controller and is used for detecting the temperature of the circuit board and generating a temperature detection signal according to the temperature of the circuit board; the first end of the output circuit is connected with the fourth end of the temperature detection circuit, and the second end of the output circuit is connected with the third end of the controller and is used for providing voltage for a load; and the controller is used for generating a first control signal according to the temperature detection signal and controlling the output circuit according to the first control signal. Therefore, the circuit can ensure the stability, reliability and safety of the generator.
In addition, the control circuit of the generator according to the embodiment of the first aspect of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, the control circuit of the generator further includes: a first voltage sampling circuit, wherein the first voltage sampling circuit is integrated on a circuit board inside the generator; one end of the first voltage sampling circuit is connected with one end of the voltage stabilizing circuit, and the other end of the first voltage sampling circuit is connected with the fourth end of the controller and is used for sampling direct current output by the voltage stabilizing circuit; the controller is further configured to generate a second control signal according to the direct current output by the voltage stabilizing circuit, and control the output circuit according to the second control signal.
According to an embodiment of the present invention, the control circuit of the generator further includes: a second voltage sampling circuit, wherein the second voltage sampling circuit is integrated on a circuit board inside the generator; one end of the second voltage sampling circuit is connected with the third end of the output circuit, and the other end of the second voltage sampling circuit is connected with the fifth end of the controller and is used for sampling the voltage provided by the output circuit for a load; the controller is further configured to generate a third control signal according to the voltage provided by the output circuit for the load, and control the output circuit according to the third control signal.
According to an embodiment of the present invention, the control circuit of the generator further includes: the current sampling circuit is integrated on a circuit board inside the generator; one end of the current sampling circuit is connected with the fourth end of the output circuit, and the other end of the current sampling circuit is connected with the sixth end of the controller and is used for sampling the output current of the output circuit; the controller is further configured to generate a fourth control signal according to the output current of the output circuit, and control the output circuit according to the fourth control signal.
According to an embodiment of the present invention, the control circuit of the generator further includes: a methane concentration detection circuit, wherein the methane concentration detection circuit is integrated on a circuit board inside the generator; the first end of the methane concentration detection circuit is connected with the seventh end of the controller, the second end of the methane concentration detection circuit is connected with the eighth end of the controller, the third end of the methane concentration detection circuit is connected with the ninth end of the controller, and the fourth end to the seventh end of the methane concentration detection circuit are respectively connected with a signal sampling interface of the combustible gas probe and are used for obtaining the methane concentration of the combustible gas probe; the controller is further configured to generate a fifth control signal according to the methane concentration and the preset methane concentration, and control the output circuit according to the fifth control signal.
And the preset methane concentration is set according to the installation position of the combustible gas probe.
According to an embodiment of the present invention, the control circuit of the generator further includes: an alternating current frequency detection circuit, wherein the alternating current frequency detection circuit is integrated on a circuit board inside the generator; one end of the alternating current frequency detection circuit is connected with the winding, and the other end of the alternating current frequency detection circuit is connected with the tenth end of the controller and is used for detecting the frequency of alternating current output by the winding; the controller is further configured to generate a sixth control signal according to the frequency of the alternating current output by the winding, and control the output circuit according to the sixth control signal.
According to an embodiment of the present invention, the control circuit of the generator further includes: a low-speed detection circuit, wherein the low-speed detection circuit is integrated on a circuit board inside the generator; one end of the low-speed detection circuit is connected with an eleventh end of the controller, and the other end of the low-speed detection circuit is connected with a rotation speed sensor and is used for generating a seventh control signal according to the rotation speed of the generator and a first preset rotation speed and controlling the output circuit according to the seventh control signal.
According to an embodiment of the present invention, the control circuit of the generator further includes: a high-speed detection circuit, wherein the high-speed detection circuit is integrated on a circuit board inside the generator; one end of the high-speed detection circuit is connected with the twelfth end of the controller, and the other end of the high-speed detection circuit is connected with the rotating speed sensor and is used for generating an eighth control signal according to the rotating speed of the generator and a second preset rotating speed and controlling the output circuit according to the eighth control signal.
To achieve the above object, a second aspect of the present invention provides a generator, which includes the control circuit of the generator.
The generator provided by the embodiment of the invention can ensure the stability, reliability and safety of the generator by the control circuit.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
Fig. 1 is a schematic structural diagram of a control circuit of a generator according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a control circuit of a motor according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a control circuit of a motor according to one embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
A control circuit of a generator and the generator according to an embodiment of the present invention are described below with reference to the accompanying drawings.
A generator refers to a mechanical device that converts other forms of energy into electrical energy. For example, it may be driven by a water turbine, steam turbine, diesel engine, belt conveyor or other power machine to convert energy from water flow, gas flow, fuel combustion, belts or nuclear fission into mechanical energy for transmission to an electrical generator, which in turn converts the energy into electrical energy. Therefore, it is important that the generator be able to operate stably, reliably, and safely.
The belt generator mainly comprises a rotor, a stator coil, a roller assembly, a main shaft, a shaft sleeve, an oil seal seat, a sealing piece and the like. The rotor is arranged on a roller of the roller assembly, the stator coil is arranged on the main shaft along with the rotation of the roller, and the main shaft is clamped on the fixing frame and kept still. The roller is in close contact with the belt of the belt conveyor, the belt moves linearly when the belt conveyor works, the roller is driven by the belt to rotate by virtue of friction force between the roller and the belt, the rotation of the rotor is realized, and the power generation process is completed.
Fig. 1 is a schematic structural diagram of a control circuit of a generator according to an embodiment of the present invention.
As shown in fig. 1, a control circuit of a generator according to an embodiment of the present invention includes: a rectifying circuit 111, a voltage stabilizing circuit 112, a temperature detecting circuit 113, an output circuit 114, and a controller 115. Wherein the rectifying circuit 111, the voltage stabilizing circuit 112, the temperature detecting circuit 113, the output circuit 114 and the controller 115 are integrated on a circuit board, and the circuit board is installed inside the generator.
One end of the rectifying circuit 111 is connected to the winding 200 of the generator, and is used for converting the alternating current generated by the winding 200 into direct current. One end of the voltage stabilizing circuit 112 is connected to the other end of the rectifying circuit 111, and the other end of the voltage stabilizing circuit 112 is connected to the first end of the temperature protecting circuit, so as to convert the unstable direct current outputted by the rectifying circuit 111 into stable direct current. The first end of the temperature detection circuit 113 is connected to the other end of the voltage stabilizing circuit 112, the second end of the temperature detection circuit 113 is connected to the first end of the controller 115, and the third end of the temperature detection circuit 113 is connected to the second end of the controller 115, and is used for detecting the temperature of the circuit board and generating a temperature detection signal according to the temperature of the circuit board. The first terminal of the output circuit 114 is connected to the fourth terminal of the temperature detection circuit 113, and the second terminal of the output circuit 114 is connected to the third terminal of the controller 115, for providing a voltage to the load. The controller 115 is configured to generate a first control signal according to the temperature detection signal, and control the output circuit 114 according to the first control signal.
Specifically, the winding 200 generates three-phase alternating current initially, the three-phase alternating current is rectified by the rectification circuit 111 and becomes direct current, the three-phase direct current is processed by the voltage stabilizing circuit 112, and stable 24V direct current can be output by the output circuit 114.
In the process of outputting 24V direct current, it is necessary to judge the surface temperature of the electrical components on the circuit board. For example, when the surface temperature of the electrical component on the circuit board is higher than a preset temperature (e.g. 125 ℃), the temperature detection circuit 113 generates a low-level signal to the controller 115, the controller 115 generates a high-level signal, and outputs the high-level signal to the output circuit 114, and the output circuit 114 no longer provides a voltage for the load; when the surface temperature of the electrical components on the circuit board is lower than or equal to the preset temperature, the temperature detection circuit 113 generates a high-level signal to the controller 115, the controller 115 generates a low-level signal and outputs the low-level signal to the output circuit 114, and the output circuit 114 provides voltage for the load again, namely, the load is automatically recovered to be powered after the temperature is normal. Therefore, the circuit can ensure the stability, reliability and safety of the generator.
According to an embodiment of the present invention, as shown in fig. 2, the control circuit of the generator further includes: a first voltage sampling circuit 116, wherein the first voltage sampling circuit 116 is integrated on a circuit board inside the generator; one end of the first voltage sampling circuit 116 is connected to one end of the voltage stabilizing circuit 112, and the other end of the first voltage sampling circuit 116 is connected to the fourth end of the controller 115, for sampling the direct current output by the voltage stabilizing circuit 112; the controller 115 is further configured to generate a second control signal according to the dc power output by the voltage stabilizing circuit 112, and control the output circuit 114 according to the second control signal.
Specifically, the first voltage sampling circuit 116 determines the sampled voltage, for example, compares the magnitude relation between the sampled voltage and the input preset voltage, and if the voltage is not equal to the input preset voltage, outputs a corresponding signal, and the controller 115 outputs a second control signal through the fourth terminal according to the signal to control the output circuit 114. For example, the controller 115 generates a high signal to control the output circuit 114 to stop supplying power to the load. It should be noted that, after power failure, the load is not automatically restored to be supplied with power.
According to an embodiment of the present invention, as shown in fig. 2, the control circuit of the generator further includes: a second voltage sampling circuit 117, wherein the second voltage sampling circuit 117 is integrated on a circuit board inside the generator; one end of the second voltage sampling circuit 117 is connected to the third end of the output circuit 114, and the other end of the second voltage sampling circuit 117 is connected to the fifth end of the controller 115, and is used for sampling the voltage of the output circuit 114 to provide voltage for the load; the controller 115 is further configured to generate a third control signal according to the voltage provided by the output circuit 114 to the load, and control the output circuit 114 according to the third control signal.
Specifically, the second voltage sampling circuit 117 determines the output voltage, for example, compares the magnitude relation between the output voltage and the output preset voltage (e.g., 24V), and if the output voltage is not equal to the output preset voltage, outputs a corresponding signal, and the controller 115 outputs a third control signal through the fourth terminal according to the signal to control the output circuit 114. For example, the controller 115 generates a high signal to control the output circuit 114 to stop supplying power to the load. It should be noted that, after power failure, the load is not automatically restored to be supplied with power.
According to an embodiment of the present invention, as shown in fig. 2, the control circuit of the generator further includes: a current sampling circuit 118, wherein the current sampling circuit 118 is integrated on a circuit board inside the generator; one end of the current sampling circuit 118 is connected to the fourth end of the output circuit 114, and the other end of the current sampling circuit 118 is connected to the sixth end of the controller 115, for sampling the output current of the output circuit 114; the controller 115 is further configured to generate a fourth control signal according to the output current of the output circuit 114, and control the output circuit 114 according to the fourth control signal.
Specifically, the current sampling circuit 118 determines the output current, for example, compares the magnitude relationship between the output current and the output preset current (e.g., 7A), and if the output current is not equal to the output preset current, outputs a corresponding signal, and the controller 115 outputs a fourth control signal through the fourth terminal according to the signal, so as to control the output circuit 114 to stop supplying power to the load. For example, the controller 115 generates a high level signal to control the output circuit 114 to stop outputting the voltage. It should be noted that, after power failure, the load is not automatically restored to be supplied with power.
It should be noted that, the controller 115 may calculate the output power according to the voltage collected by the second voltage sampling circuit 117 and the current collected by the current sampling circuit 118, determine the relationship between the output power and the preset power, and if the output power is not equal to the preset power, the controller 115 outputs a fourth control signal through the fourth terminal according to the signal, so as to control the output circuit 114. For example, the controller 115 generates a high level signal to control the output circuit 114 to stop outputting the voltage.
According to an embodiment of the present invention, as shown in fig. 2, the control circuit of the generator further includes: a methane concentration detection circuit 119, wherein the methane concentration detection circuit 119 is integrated on a circuit board inside the generator; the first end of the methane concentration detection circuit 119 is connected to the seventh end of the controller 115, the second end of the methane concentration detection circuit 119 is connected to the eighth end of the controller 115, the third end of the methane concentration detection circuit 119 is connected to the ninth end of the controller 115, and the fourth to seventh ends of the methane concentration detection circuit 119 are respectively connected to the signal sampling interfaces of the combustible gas probe 300, so as to obtain the methane concentration of the combustible gas probe 300; the controller 115 is further configured to generate a fifth control signal according to the methane concentration and the preset methane concentration, and control the output circuit 114 according to the fifth control signal. The preset methane concentration may be set according to the installation position of the combustible gas probe 300, or may be set according to a related specification, and is not limited thereto, and may be, for example, 1.0%, 1.5%, or 2.0%.
Specifically, the controller 115 compares the relationship between the methane concentration and the preset methane concentration after obtaining the methane concentration, generates a fifth control signal if the methane concentration is greater than the preset methane concentration, and controls the output circuit 114 to stop supplying power to the load according to the fifth control signal. For example, the controller 115 generates a high level signal to control the output circuit 114 to stop outputting the voltage.
According to an embodiment of the present invention, as shown in fig. 2, the control circuit of the generator further includes: an ac frequency detection circuit 120, wherein the ac frequency detection circuit 120 is integrated on a circuit board inside the generator; one end of the ac frequency detection circuit 120 is connected to the winding 200, and the other end of the ac frequency detection circuit 120 is connected to the tenth end of the controller 115, for detecting the frequency of the ac power output from the winding 200; the controller 115 is further configured to generate a sixth control signal according to the frequency of the alternating current output by the winding 200, and control the output circuit 114 according to the sixth control signal.
Specifically, the controller 115 compares the frequency of the alternating current outputted from the winding 200 with a preset frequency, generates a sixth control signal if the frequency of the alternating current is not equal to the preset frequency, and controls the output circuit 114 to stop supplying power to the load according to the sixth control signal. For example, the controller 115 generates a high level signal to control the output circuit 114 to stop outputting the voltage. It should be noted that, after power failure, the load is not automatically restored to be supplied with power.
According to an embodiment of the present invention, as shown in fig. 2, the control circuit of the generator further includes: a low-speed detection circuit 121, wherein the low-speed detection circuit 121 is integrated on a circuit board inside the generator; one end of the low-speed detection circuit 121 is connected to the eleventh end of the controller 115, and the other end of the low-speed detection circuit 121 is connected to the rotation speed sensor 400, and is configured to generate a seventh control signal according to the rotation speed of the generator and the first preset rotation speed, and control the output circuit 114 according to the seventh control signal. The first preset rotating speed can be set according to actual conditions.
Specifically, the controller 115 compares the relationship between the rotational speed of the generator and the first preset rotational speed after obtaining the rotational speed of the generator, generates a seventh control signal if the rotational speed of the generator is less than or equal to the first preset rotational speed, and controls the output circuit 114 to stop supplying power to the load according to the seventh control signal. For example, the controller 115 generates a high level signal to control the output circuit 114 to stop outputting the voltage.
According to an embodiment of the present invention, as shown in fig. 2, the control circuit of the generator further includes: a high-speed detection circuit 122, wherein the high-speed detection circuit 122 is integrated on a circuit board inside the generator; one end of the high-speed detection circuit 122 is connected to the twelfth end of the controller 115, and the other end of the high-speed detection circuit 122 is connected to the rotation speed sensor 400, and is configured to generate an eighth control signal according to the rotation speed of the generator and the second preset rotation speed, and control the output circuit 114 according to the eighth control signal. The second preset rotating speed can be set according to actual conditions.
Specifically, the controller 115 compares the relationship between the rotational speed of the generator and the second preset rotational speed after obtaining the rotational speed of the generator, generates an eighth control signal if the rotational speed of the generator is greater than or equal to the first preset rotational speed, and controls the output circuit 114 to stop supplying power to the load according to the eighth control signal. For example, the controller 115 generates a high level signal to control the output circuit 114 to stop outputting the voltage.
It should be noted that, when the rotation speed of the generator is normal, the generator can automatically restore to supply power to the load.
Fig. 3 is a circuit diagram of a control circuit of a generator according to one embodiment of the invention. The control circuit of the generator is described below in connection with fig. 3.
As an implementation manner, the voltage stabilizing circuit 112 is composed of a capacitor C1, a capacitor C2 and a capacitor C3, where the capacitor C1, the capacitor C2 and the capacitor C3 are connected in parallel, and two ends of the capacitor C1 are respectively connected to the rectifying circuit 111.
As an implementation manner, the first end of the temperature detection circuit 113 is a fixed end of a switch (such as a double-pole double-throw switch) in the relay J1, the movable ends of two switches in the relay J1 are connected with one end of the capacitor C1, the first fixed end of the first switch in the relay J1 is used as a fourth end of the temperature detection circuit 113, the second fixed end of the first switch in the relay J1 is suspended, the first fixed end of the second switch in the relay J1 is connected with the first fixed end of the first switch in the relay J1, and the second fixed end of the second switch in the relay J1 is grounded through a resistor R4 and a resistor R5 which are connected in parallel. One end of the resistor R1 is used as a second end of the temperature detection circuit 13 and is connected with a first end of the controller 115, the other end of the resistor R1 is grounded through a resistor R3, the other end of the resistor R1 is connected with a preset power supply through a temperature control switch KSD, the other end of the resistor R1 is connected with one end of a capacitor C4, the other end of the capacitor C4 is connected with one end of a coil in the relay J1, the resistor R2 is connected with the capacitor C4 in parallel, an anode of the diode D1 is connected with the other end of the coil in the relay J1, and a cathode of the diode D1 is connected with the other end of the capacitor C4. The anode of the diode D1 is connected to a first end of a switching tube K1 (e.g., a MOS tube), and a second end of the switching tube K1 is used as a third end of the temperature detection circuit 113 and is connected to a second end of the controller 115. The third end of the switching tube K1 is grounded, and a resistor R6 is connected between the second end and the third end of the switching tube.
Specifically, when the temperature control switch KSD detects that the temperature exceeds the preset temperature, the controller 115 outputs a high level signal through the second terminal, the switching tube K1 is turned off, the coil in the relay J1 is powered off, and the switch in the relay J1 is turned off.
As one implementation manner, one end of the capacitor C5 in the output circuit 114 is used as a first end of the output circuit 114, and is connected to a fixed end of the first switch in the relay J1, the other end of the capacitor C5 is grounded, the capacitor C6 is connected in parallel with the capacitor C5, the first end of the amplifier A1 is connected to one end of the capacitor C5, the second end of the amplifier A1 is connected to the other end of the capacitor C5 and is grounded, the third end of the amplifier A1 is grounded, the fourth end of the amplifier A1 is connected to one end of the sliding resistor R7, the fifth end of the amplifier A1 is connected to a sliding end of the sliding resistor R7, the sixth end of the amplifier A1 is connected to the other end of the sliding resistor R7, the other end of the capacitor C7 is grounded, the capacitor C8 is connected in parallel with the capacitor C7, one end of the resistor R8 is connected to one end of the capacitor C7, the other end of the resistor R8 is connected to the active end of the first switch in the relay J2, and the other end of the second switch in the relay J2 is grounded. The first fixed end of the first switch in the relay J2 is used as OUT-GND, the second fixed end of the first switch in the relay J2 is suspended, the first fixed end of the second switch in the relay J2 is used as OUT-24V, and the second fixed end of the second switch in the relay J2 is suspended. One end of a coil in the relay J2 is connected with a preset power supply through a capacitor C9, a resistor R9 is connected with the capacitor C9, the other end of the coil in the relay J2 is connected with an anode of a diode D2, and a cathode of the diode D2 is connected with one end of the coil in the relay J2 through a wire. The first end of the switching tube K2 (MOS tube) is connected to the anode of the diode D2, the first end of the switching tube K2 is used as the second end of the output circuit 114, and is connected to the third end of the controller 115, and the third end of the switching tube K2 is grounded. A resistor R10 is connected between the second end and the third end of the switching tube K2.
Specifically, when the third terminal of the controller 115 outputs a high level signal, the switching tube K2 is turned off, the coil in the relay J2 is deenergized, the first switch and the second switch in the relay J2 are turned off, and 24V voltage is not output any more; when the third terminal of the controller 115 outputs a low level signal, the switching tube K2 is closed, the coil in the relay J2 is powered, and the first switch and the second switch in the relay J2 are closed, and a 24V voltage is output.
As one implementation manner, one end of the resistor R11 in the first voltage sampling circuit 116 is used as one end of the first voltage sampling circuit 116, the end is connected to one end of the capacitor C1, the other end of the resistor R11 is connected to the first fixed end of the sliding resistor R13, the second fixed end of the sliding resistor R13 is grounded through the resistor R12, the sliding end of the sliding resistor R13 is connected to the same-direction input end of the comparator Co1, the opposite input end of the comparator Co1 is connected to the output end of the comparator Co1, one end of the capacitor C11 is connected to the output end of the comparator Co1, the other end of the capacitor C11 is grounded, one end of the resistor R14 is connected to the opposite input end of the comparator Co1, the other end of the resistor R14 is connected to the other end of the capacitor C11, and one end of the capacitor C11 is used as the other end of the first voltage sampling circuit 116 is connected to the fourth end of the controller 115.
Specifically, the first voltage sampling circuit 116 determines the sampled voltage, for example, compares the magnitude relation between the sampled voltage and the input preset voltage, and if the voltage is not equal to the input preset voltage, outputs a corresponding signal, and the controller 115 outputs a second control signal through the fourth terminal according to the signal to control the output circuit 114. For example, the controller 115 generates a high level signal to control the output circuit 114 to stop outputting the voltage.
As one implementation manner, one end of the resistor R18 in the second voltage sampling circuit 117 is used as one end of the second voltage sampling circuit 117, connected to the third end of the output circuit 114, the other end of the resistor R18 is connected to the first fixed end of the sliding resistor R16, and the second fixed end of the sliding resistor R16 is grounded through the resistor R17. The sliding end of the sliding resistor R16 is connected to the Co-directional input end of the comparator Co2, the Co-directional input end of the comparator Co2 is further grounded through the capacitor C13, the reverse input end of the comparator Co2 is connected to the output end of the comparator Co2, and the output end of the comparator Co2 serves as the other end of the second voltage sampling circuit 117 and is connected to the fifth end of the controller 115. The inverting input of the comparator Co2 is connected to the output of the comparator Co2 via a node on a conductor which is connected to one end of a resistor R15, the other end of the resistor R15 is connected to one end of a capacitor C12, and the other end of the capacitor C12 is connected to the fifth end of the controller 115.
Specifically, the second voltage sampling circuit 117 determines the output voltage, for example, compares the magnitude relation between the output voltage and the output preset voltage (e.g., 24V), if the output voltage is not equal to the output preset voltage, a corresponding signal is output, and the controller 115 outputs a third control signal through the fourth terminal according to the signal to control the output circuit 114. For example, the controller 115 generates a high level signal to control the output circuit 114 to stop outputting the voltage.
As an implementation manner, the first end of the amplifier A2 in the current sampling circuit 118 is used as one end of the current sampling circuit 118 and is connected to the fourth end of the output circuit 114, the second end of the amplifier A2 is connected to one end of the capacitor C16, the other end of the capacitor C16 is connected to the third end of the amplifier A2, one end of the capacitor C17 is connected to one end of the capacitor C16 and then grounded, and the other end of the capacitor C17 is connected to the other end of the capacitor C16 and then connected to a preset power supply. The fourth end of the amplifier A2 is connected with one end of the capacitor R18, the fifth end of the amplifier A2 is connected with one end of the resistor R22, the other end of the resistor R22 is connected with the first fixed end of the sliding resistor R20, and the second fixed end of the sliding resistor R20 is grounded through the resistor R21. The sliding end of the sliding resistor R20 is connected with the same-direction input end of the comparator Co3, a node is arranged between the same-direction input end of the comparator Co3 and the sliding end of the sliding resistor R20, the node is connected with one end of the capacitor C15 through a wire, and the other end of the capacitor C15 is grounded. The inverting input terminal of the comparator Co3 is connected to the output terminal of the comparator Co3, a node is provided between the inverting input terminal of the comparator Co3 and the output terminal of the comparator Co3, the node is connected to one end of the resistor R19 through a wire, the other end of the resistor R19 is grounded, the other end of the resistor R19 is further connected to one end of the capacitor C14, and the other end of the capacitor C14 is used as the other end of the current sampling circuit 118 and is connected to the sixth end of the controller 115.
Specifically, the current sampling circuit 118 determines the output current, for example, compares the magnitude relationship between the output current and the output preset current (e.g., 7A), and if the output current is not equal to the output preset current, outputs a corresponding signal, and the controller 115 outputs a fourth control signal through the fourth terminal according to the signal to control the output circuit 114. For example, the controller 115 generates a high level signal to control the output circuit 114 to stop outputting the voltage.
It should be noted that, the controller 115 may calculate the output power according to the voltage collected by the second voltage sampling circuit 117 and the current collected by the current sampling circuit 118, determine the relationship between the output power and the preset power, and if the output power is not equal to the preset power, the controller 115 outputs a fourth control signal through the fourth terminal according to the signal, so as to control the output circuit 114. For example, the controller 115 generates a high level signal to control the output circuit 114 to stop outputting the voltage.
As one implementation, the first end of the amplifier A5 in the methane concentration detection circuit 119 is connected to the seventh end of the controller 115 as the first end of the methane concentration detection circuit 119. A second terminal of the amplifier A5 is connected to an eighth terminal of the controller 115 as a second terminal of the methane concentration detection circuit 119. A second end of the switching tube K4 (MOS tube) in the methane concentration detection circuit 119 is connected to a ninth end of the controller 115 as a third end of the methane concentration detection circuit 119. The first end of the switch tube K4 is connected with a preset power supply through a resistor R23, and the third end of the switch tube K4 is grounded. The second end of the switch tube K3 is connected with the first end of the switch tube K4, the first end of the switch tube K3 is connected with a preset power supply, the third end of the switch tube K3 is connected with one end of the capacitor C16, the other end of the capacitor C16 is grounded, the first end of the amplifier A3 is connected with the third end of the switch tube K3, the second end of the amplifier A3 is grounded, the third end of the amplifier A3 is connected with one end of the capacitor C18, the fourth end of the amplifier A3 is connected with one end of the capacitor C17, the other end of the capacitor C17 and the other end of the capacitor C18 are connected with the fifth end of the amplifier A3, and the capacitor C19 is connected with the capacitor C18 in parallel. The first end of the amplifier A4 is connected with the first end of the amplifier A3, the second end of the amplifier A4 is grounded, the third end of the amplifier A4 is connected with one end of the capacitor C20, the other end of the capacitor C20 is grounded, the capacitor C21 is grounded, one end of the capacitor C20 is connected with the fourth end of the amplifier A5, and the third end of the amplifier A5 is grounded. The fifth terminal of the amplifier A5 is connected to the other terminal of the capacitor C18. The fifth terminal of the amplifier A5 is connected to the first terminal of the signal sampling interface of the fuel gas probe 300 as the fourth terminal of the methane concentration detection circuit 119. The sixth terminal of the amplifier A5 is connected to the second terminal of the signal sampling interface of the fuel gas probe 300 as the fifth terminal of the methane concentration detection circuit 119. The seventh end of the amplifier A5 is connected to the third end of the signal sampling interface of the fuel gas probe 300 as the sixth end of the methane concentration detection circuit 119. One end of the capacitor C18 is connected to one end of the resistor R24, the first end of the switching tube K5 (NPN-type switching tube) and the first end of the switching tube K6 (NPN-type switching tube) are both connected to one end of the resistor R24, the second end of the switching tube K5 and the second end of the switching tube K6 are connected to the other end of the resistor R24, the other end of the resistor R24 is connected to the first end of the switching tube K7, the third end of the switching tube K5 is connected to the second end of the switching tube K7 and one end of the resistor R25, and the other end of the resistor R25 serves as a seventh end of the methane concentration detection circuit 119 and is connected to the fourth end of the signal sampling interface of the combustible gas probe 300. The third end of the switch tube K6 is respectively connected with the second end of the switch tube K8 and one end of the resistor R26, and the other end of the resistor R26 is connected with the other end of the resistor R25.
Specifically, the controller 115 compares the relationship between the methane concentration and the preset methane concentration after obtaining the methane concentration, and generates a high-level signal to control the output circuit 114 to stop outputting the voltage if the methane concentration is greater than the preset methane concentration.
The preset methane concentration may be set according to the installation position of the flammable gas probe 300, or may be set according to a related specification, and is not limited thereto.
As an implementation manner, in the ac frequency detection circuit, the anode of the diode D3 is connected to one end of the winding 200, the cathode of the diode D3 is connected to one end of the resistor R27, the other end of the resistor R27 is connected to the cathode of the diode D4, the anode of the diode D4 is connected to the other end of the winding 200, one end of the resistor R28 is connected to the cathode of the diode D4, the other end of the resistor R28 is connected to one end of the capacitor C22, the other end of the capacitor C22 is connected to the anode of the diode D4, one end of the capacitor C22 is connected to the first end of the optocoupler OC, the second end of the optocoupler OC is connected to the other end of the capacitor C22, the third end of the optocoupler OC is further connected to one end of the capacitor C23, the other end of the capacitor C23 is connected to the fourth end of the optocoupler OC and then grounded, and one end of the capacitor C23 serves as the other end of the ac frequency detection circuit 120 is connected to the tenth end of the controller 115.
Specifically, the controller 115 compares the frequency of the alternating current outputted from the winding 200 with a preset frequency, and generates a high level signal to control the output circuit 114 to stop outputting the voltage if the frequency of the alternating current is not equal to the preset frequency.
In summary, the control circuit of the generator according to the embodiment of the invention is composed of the rectifying circuit, the voltage stabilizing circuit, the temperature detecting circuit, the output circuit and the controller, wherein the rectifying circuit, the voltage stabilizing circuit, the temperature detecting circuit, the output circuit and the controller are integrated on a circuit board, and the circuit board is installed inside the generator; one end of the rectifying circuit is connected with a winding of the generator and is used for converting alternating current generated by the winding into direct current; one end of the voltage stabilizing circuit is connected with the other end of the rectifying circuit, and the other end of the voltage stabilizing circuit is connected with the first end of the temperature protection circuit and is used for converting unstable direct current output by the rectifying circuit into stable direct current; the first end of the temperature detection circuit is connected with the other end of the voltage stabilizing circuit, the second end of the temperature detection circuit is connected with the first end of the controller, and the third end of the temperature detection circuit is connected with the second end of the controller and is used for detecting the temperature of the circuit board and generating a temperature detection signal according to the temperature of the circuit board; the first end of the output circuit is connected with the fourth end of the temperature detection circuit, and the second end of the output circuit is connected with the third end of the controller and is used for providing voltage for a load; and the controller is used for generating a first control signal according to the temperature detection signal and controlling the output circuit according to the first control signal. Therefore, the circuit can ensure the stability, reliability and safety of the generator.
Based on the above embodiment, the embodiment of the invention further provides a generator, which comprises the control circuit of the generator.
The generator provided by the embodiment of the invention can ensure the stability, reliability and safety of the generator by the control circuit.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (7)
1. A control circuit for a generator, comprising:
The power generator comprises a rectifying circuit, a voltage stabilizing circuit, a temperature detection circuit, an output circuit and a controller, wherein the rectifying circuit, the voltage stabilizing circuit, the temperature detection circuit, the output circuit and the controller are integrated on a circuit board, and the circuit board is arranged in the generator;
one end of the rectifying circuit is connected with a winding of the generator and is used for converting alternating current generated by the winding into direct current;
one end of the voltage stabilizing circuit is connected with the other end of the rectifying circuit, and the other end of the voltage stabilizing circuit is connected with the first end of the temperature protection circuit and is used for converting unstable direct current output by the rectifying circuit into stable direct current;
the first end of the temperature detection circuit is connected with the other end of the voltage stabilizing circuit, the second end of the temperature detection circuit is connected with the first end of the controller, and the third end of the temperature detection circuit is connected with the second end of the controller and is used for detecting the temperature of the circuit board and generating a temperature detection signal according to the temperature of the circuit board;
the first end of the output circuit is connected with the fourth end of the temperature detection circuit, and the second end of the output circuit is connected with the third end of the controller and is used for providing voltage for a load;
The controller is used for generating a first control signal according to the temperature detection signal and controlling the output circuit according to the first control signal;
a methane concentration detection circuit, wherein the methane concentration detection circuit is integrated on a circuit board inside the generator;
the first end of the methane concentration detection circuit is connected with the seventh end of the controller, the second end of the methane concentration detection circuit is connected with the eighth end of the controller, the third end of the methane concentration detection circuit is connected with the ninth end of the controller, and the fourth end to the seventh end of the methane concentration detection circuit are respectively connected with a signal sampling interface of the combustible gas probe and are used for obtaining the methane concentration of the combustible gas probe;
wherein, the first end of the amplifier A5 in the methane concentration detection circuit 119 is used as the first end of the methane concentration detection circuit 119, which is connected with the seventh end of the controller 115, the second end of the amplifier A5 is used as the second end of the methane concentration detection circuit 119, which is connected with the eighth end of the controller 115, the second end of the switch tube K4 in the methane concentration detection circuit 119 is used as the third end of the methane concentration detection circuit 119, which is connected with the ninth end of the controller 115, the first end of the switch tube K4 is connected with a preset power supply through a resistor R23, the third end of the switch tube K4 is grounded, the second end of the switch tube K3 is connected with the first end of the switch tube K4, the first end of the switch tube K3 is connected with the preset power supply, the third end of the switch tube K3 is connected with one end of the capacitor C16, the other end of the capacitor C16 is grounded, the first end of the amplifier A3 is connected with the third end of the switch tube K3, the second end of the amplifier A3 is grounded, the third end of the amplifier A3 is connected with one end of the capacitor C18, the fourth end of the amplifier A3 is connected with one end of the capacitor C17, the other end of the capacitor C17 and the other end of the capacitor C18 are connected with the fifth end of the amplifier A3, the capacitor C19 is connected with the capacitor C18 in parallel, the first end of the amplifier A4 is connected with the first end of the amplifier A3, the second end of the amplifier A4 is grounded, the third end of the amplifier A4 is connected with one end of the capacitor C20, the other end of the capacitor C20 is grounded, one end of the capacitor C20 is connected with the fourth end of the amplifier A5, the third end of the amplifier A5 is grounded, the fifth end of the amplifier A5 is connected with the other end of the capacitor C18, the fifth end of the amplifier A5 is used as the fourth end of the methane concentration detection circuit 119 and connected with the first end of the signal sampling interface of the combustible gas probe 300, the sixth end of the amplifier A5 is used as the fifth end of the methane concentration detection circuit 119, the seventh end of the amplifier A5 is used as the sixth end of the methane concentration detection circuit 119 and is connected with the third end of the signal sampling interface of the combustible probe 300, one end of the capacitor C18 is connected with one end of the resistor R24, the first end of the switch tube K5 and the first end of the switch tube K6 are both connected with one end of the resistor R24, the second end of the switch tube K5 and the second end of the switch tube K6 are connected with the other end of the resistor R24, the other end of the resistor R24 is connected with the first end of the switch tube K7, the third end of the switch tube K5 is respectively connected with the second end of the switch tube K7 and one end of the resistor R25, the other end of the resistor R25 is used as the seventh end of the methane concentration detection circuit 119 and is connected with the fourth end of the signal sampling interface of the combustible probe 300, the third end of the switch tube K6 is respectively connected with the second end of the switch tube K8 and one end of the resistor R26, the other end of the resistor R26 is connected with the other end of the resistor R25,
The controller is further used for generating a fifth control signal according to the methane concentration and the preset methane concentration, and controlling the output circuit according to the fifth control signal;
further comprises:
a low-speed detection circuit, wherein the low-speed detection circuit is integrated on a circuit board inside the generator;
one end of the low-speed detection circuit is connected with an eleventh end of the controller, and the other end of the low-speed detection circuit is connected with a rotation speed sensor and is used for generating a seventh control signal according to the rotation speed of the generator and a first preset rotation speed and controlling the output circuit according to the seventh control signal;
a high-speed detection circuit, wherein the high-speed detection circuit is integrated on a circuit board inside the generator;
one end of the high-speed detection circuit is connected with the twelfth end of the controller, and the other end of the high-speed detection circuit is connected with the rotating speed sensor and is used for generating an eighth control signal according to the rotating speed of the generator and a second preset rotating speed and controlling the output circuit according to the eighth control signal.
2. The control circuit of a generator of claim 1, further comprising:
A first voltage sampling circuit, wherein the first voltage sampling circuit is integrated on a circuit board inside the generator;
one end of the first voltage sampling circuit is connected with one end of the voltage stabilizing circuit, and the other end of the first voltage sampling circuit is connected with the fourth end of the controller and is used for sampling direct current output by the voltage stabilizing circuit;
the controller is further configured to generate a second control signal according to the direct current output by the voltage stabilizing circuit, and control the output circuit according to the second control signal.
3. The control circuit of a generator of claim 1, further comprising:
a second voltage sampling circuit, wherein the second voltage sampling circuit is integrated on a circuit board inside the generator;
one end of the second voltage sampling circuit is connected with the third end of the output circuit, and the other end of the second voltage sampling circuit is connected with the fifth end of the controller and is used for sampling the voltage provided by the output circuit for a load;
the controller is further configured to generate a third control signal according to the voltage provided by the output circuit for the load, and control the output circuit according to the third control signal.
4. The control circuit of a generator of claim 1, further comprising:
the current sampling circuit is integrated on a circuit board inside the generator;
one end of the current sampling circuit is connected with the fourth end of the output circuit, and the other end of the current sampling circuit is connected with the sixth end of the controller and is used for sampling the output current of the output circuit;
the controller is further configured to generate a fourth control signal according to the output current of the output circuit, and control the output circuit according to the fourth control signal.
5. The control circuit of the generator of claim 1, wherein the preset methane concentration is set according to a mounting position of the combustible probe.
6. The control circuit of a generator of claim 1, further comprising:
an alternating current frequency detection circuit, wherein the alternating current frequency detection circuit is integrated on a circuit board inside the generator;
one end of the alternating current frequency detection circuit is connected with the winding, and the other end of the alternating current frequency detection circuit is connected with the tenth end of the controller and is used for detecting the frequency of alternating current output by the winding;
The controller is further configured to generate a sixth control signal according to the frequency of the alternating current output by the winding, and control the output circuit according to the sixth control signal.
7. A generator comprising a control circuit of the generator of any one of claims 1-6.
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| CN202110800795.4A CN113630050B (en) | 2021-07-15 | 2021-07-15 | Generator and control circuit thereof |
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| CN202110800795.4A CN113630050B (en) | 2021-07-15 | 2021-07-15 | Generator and control circuit thereof |
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| CN102324886A (en) * | 2011-08-15 | 2012-01-18 | 重庆瑜欣平瑞电子有限公司 | The portable fuel generator control method |
| CN104781030A (en) * | 2012-11-13 | 2015-07-15 | 林肯环球股份有限公司 | Electric arc welding system comprising engine-generator and battery and method for controlling battery recharging in same |
| CN105298664A (en) * | 2015-11-20 | 2016-02-03 | 山东大学 | System for controlling air-fuel ratio of biogas internal combustion generating set and control method of system |
| CN205223241U (en) * | 2015-12-15 | 2016-05-11 | 河南省谷庄生态节能循环农业有限公司 | Biogas generation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324886A (en) * | 2011-08-15 | 2012-01-18 | 重庆瑜欣平瑞电子有限公司 | The portable fuel generator control method |
| CN104781030A (en) * | 2012-11-13 | 2015-07-15 | 林肯环球股份有限公司 | Electric arc welding system comprising engine-generator and battery and method for controlling battery recharging in same |
| CN105298664A (en) * | 2015-11-20 | 2016-02-03 | 山东大学 | System for controlling air-fuel ratio of biogas internal combustion generating set and control method of system |
| CN205223241U (en) * | 2015-12-15 | 2016-05-11 | 河南省谷庄生态节能循环农业有限公司 | Biogas generation system |
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