CN113153767A - Self-priming water pump control circuit, self-priming water pump and self-priming water pump control method - Google Patents
Self-priming water pump control circuit, self-priming water pump and self-priming water pump control method Download PDFInfo
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- CN113153767A CN113153767A CN202110274592.6A CN202110274592A CN113153767A CN 113153767 A CN113153767 A CN 113153767A CN 202110274592 A CN202110274592 A CN 202110274592A CN 113153767 A CN113153767 A CN 113153767A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0077—Safety measures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/0281—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition not otherwise provided for
Abstract
The invention belongs to the technical field of water pump circuit control, and provides a self-priming water pump control circuit, a self-priming water pump and a self-priming water pump control method, wherein the control circuit comprises a control module and is used for generating a corresponding control signal according to an adjusting signal acquired by a key module, and adjusting the working state of the self-priming water pump through the control signal; the pressure sensing module is connected with the control module and used for collecting water pressure information and sending the water pressure information to the control module; and the relay control module is connected with the control module and is used for controlling the working state of the self-priming pump according to the control signal. The invention has the advantages that the control module and the relay replace the pressure switch adopted in the prior art to control the switch of the water pump, so that the water pump can be controlled by an electric signal, and the automatic opening of the water pump caused by the pressure change of the water pump can be avoided.
Description
Technical Field
The invention relates to the technical field of water pump circuit control, in particular to a self-priming water pump control circuit, a self-priming water pump and a self-priming water pump control method.
Background
The self-priming water pump is a water conservancy machinery for pumping water, and is formed by assembling a pump body, a rotary assembly, a faucet assembly, a trash removal cover, a water inlet pipe, a water outlet pipe and a baffle net. The pump has the advantages of excellent performance, deep suction range, large flow, labor and time saving operation, and is the best water pump machine in the real society. The self priming water pump starter motor, the power linkage, rotatory assembly are under impeller centrifuge's promotion, and the bubble upwards surges, produces suction, and the air of inlet tube is outside the outlet pipe discharge pump body, and the air is discharged, and water flows out through the outlet pipe.
In the prior art, the self priming water pump will realize automaticly, it makes its realization automatic to often adopt at self priming pump facial make-up pressure switch, pressure switch control break-make is the automatic realization of the pressure that leans on water, mechanical type automatic self priming pump is exactly an automatic self priming water pump of built-in mechanical type pressure switch above the self priming pump, but the automatic self priming water pump of mechanical type that adopts pressure switch can have water pressure change and pressure switch opens automatically, the unable operating condition of monitoring water pump and the problem that reduces self priming pump's working life during water pump work.
Disclosure of Invention
The invention aims to provide a self-priming water pump control circuit, a self-priming water pump and a self-priming water pump control method, and aims to solve the problem of electronic control of the self-priming water pump.
In order to achieve the purpose, the invention adopts the technical scheme that:
a self-priming water pump control circuit comprising:
the key module is used for acquiring the demand information of the user to generate an adjusting signal;
the control module is connected with the key module and used for generating a corresponding control signal according to the adjusting signal acquired by the key module and adjusting the working state of the self-priming pump through the control signal;
the pressure and temperature sensing module is connected with the control module and used for collecting water pressure and water temperature information and sending the water pressure information and the water temperature information to the control module;
the relay control module is connected with the control module and is used for controlling the working state of the self-priming water pump according to a control signal;
and the power supply module is respectively connected with the key module, the control module and the pressure and temperature sensing module, and is used for converting an input power supply into a preset voltage to supply power to the key module, the control module and the pressure and temperature sensing module.
Further, the control module comprises a control chip U1, a reset circuit and a signal conversion chip U2;
the second pin of the control chip U1 is connected with the reset circuit;
the third pin, the fourth pin and the fifth pin of the control chip U1 are all connected with the key module, the fourteenth pin of the control chip U1 is connected with the ninth pin of the signal conversion chip U2, the fifteenth pin of the control chip U1 is connected with the eleventh pin of the signal conversion chip U2, the sixteenth pin of the control chip U1 is connected with the twelfth pin of the signal conversion chip U2, and the thirtieth pin of the control chip U1 is connected with the relay control module.
Further, the key module includes a resistor R3, a resistor R2, a resistor R1, a key S1, a key S2 and a key S3;
one end of the key S1 is connected with a third pin of the control chip U1, the other end of the key S1 is grounded, one end of the key S1 connected with the control chip U1 is also connected with the power module through a resistor R3, one end of the key S2 is connected with a fourth pin of the control chip U1, the other end of the key S2 is grounded, one end of the key S2 connected with the control chip U1 is also connected with the power module through a resistor R2, one end of the key S3 is connected with a fifth pin of the control chip U1, the other end of the key S3 is grounded, and one end of the key S3 connected with the control chip U1 is also connected with the power module through a resistor R1.
Further, the pressure and temperature sensing module comprises an interface P3, a resistor R21, a resistor R22, a resistor R23, a capacitor C2 and a capacitor C3;
Further, the relay control module comprises a relay K1, a diode D2, a resistor R29, a triode Q1 and a resistor R33;
one end of a resistor R33 is connected with the thirtieth pin of the control chip U1, the other end of a resistor R33 is connected with the base electrode of a triode Q1, the emitter electrode of the triode Q1 is grounded, the collector electrode of the triode Q1 is connected with the anode electrode of a diode D2, the cathode electrode of the diode D2 is connected with a port 4 of a relay K1, a port 4 of the relay K1 is further connected with a power supply module, the collector electrode of the triode Q1 is further connected with one end of a resistor R29, the other end of the resistor R29 is connected with a port 3 of a relay K1, and a port 1 and a port 2 of the relay K1 are both connected with the power supply module.
The power supply module comprises a first voltage conversion unit, the first voltage conversion unit is used for converting an input power supply into a first preset voltage, and the first preset voltage is used for supplying power to the relay control module;
the first voltage conversion unit comprises an interface P1, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a transformer T1, a rectifier bridge DB1, a capacitor C1 and a capacitor E1;
one end of a resistor R11 is connected with an alternating current input live wire, a resistor R10, a resistor R9 and a resistor R8 are sequentially connected in series between the other end of the resistor R11 and a port 1 of a transformer T1, one end of a resistor R7 is connected with an alternating current input zero line, a resistor R6, a resistor R5 and a resistor R4 are sequentially connected in series between the other end of the resistor R7 and a port 5 of a transformer T1, a port 9 of the transformer T1 is connected with a port 2 of a rectifier bridge DB1, a port 7 of the transformer T1 is connected with a port 4 of a rectifier bridge DB1, a port 3 of the rectifier bridge DB1 is connected with the positive electrode of a capacitor E1, a port 1 of the rectifier bridge 1 is connected with the negative electrode of a capacitor E1, a capacitor C1 is connected in parallel with two ends of the capacitor E1, a port 3 of the rectifier bridge DB1 outputs a first preset voltage, and a port 1 of the rectifier bridge DB1 is also grounded;
Further, the power module further comprises a second voltage conversion unit, wherein the second voltage conversion unit is used for converting the first preset voltage into a second preset voltage, and the second preset voltage is used for supplying power to the control module, the key module and the pressure and temperature sensing module;
the second voltage conversion unit comprises a voltage conversion chip U3, a capacitor E3, a capacitor C64, a resistor R20, a diode D26, a resistor R19, a resistor R18, a capacitor E2, a capacitor C67, a capacitor C62 and an inductor L4;
the first pin of the voltage conversion chip U3 is connected with the sixth pin through a capacitor C62, the fifth pin of the voltage conversion chip U3 is connected with the fourth pin through a resistor R20, the fifth pin of the voltage conversion chip U3 is further connected with the anode of a capacitor E3, the cathode of a capacitor E3 is grounded, a capacitor C64 is connected in parallel with two ends of a capacitor E3, the anode of a capacitor E3 is further connected with a first preset voltage, the second pin of the voltage conversion chip U3 is grounded, the third pin of the voltage conversion chip U3 is grounded through a resistor R18, the sixth pin of the voltage conversion chip U3 is further connected with one end of an inductor L4, the other end of the inductor L4 is connected with the third pin of the voltage conversion chip U3 through a resistor R19, the sixth pin of the voltage conversion chip U3 is further connected with the cathode of a diode D26, the anode of a diode D26 is grounded, the anode of the inductor L4 and one end of the resistor R6867 connected with the anode of the capacitor E2 and the cathode 2 of the capacitor E2, the capacitor C67 is connected in parallel to the two ends of the capacitor E2, and the anode of the capacitor E2 outputs a second preset voltage.
The leakage protection module is used for protecting the operation of the self-priming pump by measuring the effective current when the self-priming pump works;
the leakage protection module comprises a current detection circuit and a leakage feedback circuit;
the current detection circuit comprises a capacitor C12, a resistor R17, a resistor R16, a capacitor C11, a comparator LM1, a capacitor C9, a resistor R13, a resistor R14, a resistor R15, a resistor R12 and a capacitor C10;
one end of a resistor R12 is connected with an alternating current input live wire, the other end of the resistor R12 is connected with a port 3 of a comparator LM1, a capacitor C10 is connected at two ends of the resistor R12 in parallel, one end of a resistor R13 is connected with the alternating current input live wire, the other end of the resistor R13 is connected with a port 2 of a comparator LM1, a capacitor C9 is connected at two ends of a resistor R13 in parallel, the port 3 of the comparator LM1 is connected with a power supply module through a resistor R15, the port 3 of the comparator LM1 is also grounded through a resistor R14, the port 1 of the comparator LM1 is connected with one end of a resistor R17, the other end of the resistor R17 is grounded through a capacitor C12, the end connected with a resistor R17 and the capacitor C12 is connected with a twenty-ninth pin of a control chip U1, the port 1 of the comparator LM1 is also connected with the port 2 of the comparator LM1 through a resistor R16, and a capacitor C11 is connected at two ends of a resistor R16 in parallel;
the leakage feedback circuit comprises a resistor R26, a resistor R27, a resistor R28 and a current transformer U5;
a port 1 of the current transformer U5 is connected with a thirty-first pin of the control chip U1, a port 1 of the current transformer U5 is also connected with a port 2 of the current transformer U5 through a resistor R26, a port 2 of the current transformer U5 is connected with a power supply module through a resistor R27, and a port 2 of the current transformer U5 is also grounded through a resistor R28;
the control chip U1 compares the current signal collected by the current detection circuit with the signal collected by the leakage feedback circuit and calculates the effective current, thereby protecting the operation of the self-priming pump.
The self-priming water pump further comprises a display module, wherein the display module is used for displaying the working state of the self-priming water pump;
the display module comprises an LCD screen, and the LCD screen is connected with the signal conversion chip U2.
The invention also provides a self-priming water pump, which comprises a load and a self-priming water pump control circuit.
The invention also provides a self-priming water pump control method, which comprises the following steps:
acquiring the demand information of a user through a key module to generate an adjusting signal, and sending the adjusting signal to a control module;
the water pressure and water temperature information is collected through the pressure and temperature sensing module and is sent to the control module;
the control module processes the received adjusting signal, the water pressure and the water temperature information and generates a corresponding control signal;
and the relay control module controls the working state of the self-priming pump according to the control signal.
Further, the method also comprises the following steps:
the input power supply is converted into preset voltage through the power supply module to supply power for the key module, the control module, the relay control module and the pressure and temperature sensing module.
Further, the step of converting the input power into the preset voltage through the power module includes:
converting an input power supply into a first preset voltage, and supplying power to the relay control module through the first preset voltage;
and converting the first preset voltage into a second preset voltage through a voltage conversion chip U3, wherein the second preset voltage is used for supplying power to the control module, the key module and the pressure and temperature sensing module.
Further, the method also comprises the following steps:
the operation of the self-priming pump is protected by measuring the effective current value when the self-priming pump works.
Compared with the prior art, the invention at least comprises the following beneficial effects:
(1) the water pressure in the water pipe is detected in real time through the pressure and temperature sensing module, so that the control module can control the start and stop of the self-priming pump through the water pressure of the water pipe;
(2) the control module and the relay replace a pressure switch adopted in the past to control the switch of the water pump, so that the water pump can be controlled by an electric signal, and the automatic opening of the water pump caused by the pressure change of the water pump is avoided;
(3) the effective current value of the self-priming water pump during working is monitored in real time through the leakage protection module, and when the current value is too large, the power supply can be cut off in time, so that the self-priming water pump is protected.
Drawings
FIG. 1 is a schematic block diagram of an embodiment of the present invention;
FIG. 2 is a circuit diagram of a control module and a display module according to an embodiment of the invention;
FIG. 3 is a circuit diagram of a pressure and temperature sensing module in an embodiment of the present invention;
FIG. 4 is a circuit diagram of a key module in an embodiment of the invention;
FIG. 5 is a circuit diagram of a relay control module, a power module and a leakage protection module in an embodiment of the invention;
FIG. 6 is a flow chart of a self-priming pump control method in an embodiment of the present invention.
Detailed Description
The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the drawings, but the present invention is not limited to these embodiments.
The following describes a self-priming water pump control circuit provided by an embodiment of the present invention in detail by taking an application in a self-priming water pump as an example:
example one
The self-priming water pump comprises a load and a self-priming water pump control circuit, and the load of the self-priming water pump is driven and controlled through the control circuit.
As shown in fig. 1, the self-priming water pump control circuit comprises a key module, a control module, a pressure and temperature sensing module, a relay control module, a power supply module, an electric leakage protection module and a display module, wherein the key module, the pressure and temperature sensing module, the relay control module, the power supply module, the electric leakage protection module and the display module are all connected with the control module, and the relay control module, the pressure and temperature sensing module, the key module and the electric leakage protection module are all connected with the power supply module.
Specifically, as shown in fig. 2, the control module includes a control chip U1, a reset circuit and a signal conversion chip U2;
the second pin of the control chip U1 is connected with the reset circuit;
the reset circuit comprises a resistor R30, a diode D4 and a capacitor C13, wherein the cathode of the diode D4 is connected with the power module, the anode of the diode D4 is grounded through the capacitor C13, the resistor R30 is connected to two ends of the diode D4 in parallel, and the anode of the diode D4 is connected with a second pin of the control chip U1.
The third pin, the fourth pin and the fifth pin of the control chip U1 are all connected with the key module, the fourteenth pin of the control chip U1 is connected with the ninth pin of the signal conversion chip U2, the fifteenth pin of the control chip U1 is connected with the eleventh pin of the signal conversion chip U2, the sixteenth pin of the control chip U1 is connected with the twelfth pin of the signal conversion chip U2, and the thirtieth pin of the control chip U1 is connected with the relay control module.
The model of control chip U1 is R7F0C908, and control module is used for generating corresponding control signal according to the adjusting signal that the key module obtained, adjusts the operating condition from the water sucking pump through control signal.
The display module comprises an LCD screen, ports 1 to 4 of the LCD screen are respectively connected with twenty-fourth pins to twenty-first pins of the signal conversion chip U2, ports 5 to 15 of the LCD screen are respectively connected with twenty-fifth pins to thirty-fifth pins of the signal conversion chip U2, the model of the LCD screen is TJC3-15P, and the display module is used for displaying the working state of the self-priming water pump.
As shown in fig. 3, the pressure and temperature sensing module includes an interface P3, a resistor R21, a resistor R22, a resistor R23, a capacitor C2, and a capacitor C3;
The pressure and temperature sensing module is used for collecting water pressure and water temperature information and sending the water pressure information and the water temperature information to the control module.
The pressure and temperature sensing module can acquire water pressure in real time through the pressure and temperature sensor so that the control module can control the start and stop of the work of the self-priming pump through the water pressure of the water pipe.
As shown in fig. 4, the key module includes a resistor R3, a resistor R2, a resistor R1, a key S1, a key S2, and a key S3;
one end of a key S1 is connected with a third pin of a control chip U1, the other end of the key S1 is grounded, one end of the key S1, which is connected with the control chip U1, is also connected with the power module through a resistor R3, one end of a key S2 is connected with a fourth pin of the control chip U1, the other end of the key S2 is grounded, one end of the key S2, which is connected with the control chip U1, is also connected with the power module through a resistor R2, one end of the key S3 is connected with a fifth pin of the control chip U1, the other end of the key S3 is grounded, one end of the key S3, which is connected with the control chip U1, is also connected with the power module through a resistor R1, and the key module is used for acquiring the demand information of the user to generate an adjustment signal;
the user can adjust the operating condition from the water sucking pump through the keys S1 to S3, and the user requirements are met.
As shown in fig. 5, the relay control module includes a relay K1, a diode D2, a resistor R29, a transistor Q1, and a resistor R33;
one end of a resistor R33 is connected with the thirtieth pin of the control chip U1, the other end of a resistor R33 is connected with the base electrode of a triode Q1, the emitter electrode of the triode Q1 is grounded, the collector electrode of the triode Q1 is connected with the anode electrode of a diode D2, the cathode electrode of the diode D2 is connected with a port 4 of a relay K1, a port 4 of the relay K1 is further connected with a power supply module, the collector electrode of the triode Q1 is further connected with one end of a resistor R29, the other end of the resistor R29 is connected with a port 3 of a relay K1, and a port 1 and a port 2 of the relay K1 are both connected with the power supply module.
Control signal passes through network interface relay and conveys triode Q1 among the relay control module, and when control signal transmission, triode Q1 switches on, and first preset voltage can make relay K1's coil circular telegram, and then actuation relay K1's contact, and the energy of exchanging the live wire just can transmit the load of self priming pump through interface P1 on for the load of self priming pump begins work.
The relay control module is used for controlling the working state of the self-priming water pump according to the control signal, and the relay control module and the relay K1 replace a pressure switch which is adopted in the past to control the switch of the water pump, so that the water pump can be controlled through an electric signal, and the automatic opening of the water pump caused by the pressure change of the water pump can be avoided.
As shown in fig. 5, the power module includes a first voltage conversion unit and a second voltage conversion unit, the first voltage conversion unit is configured to convert an input power into a first preset voltage, and the first preset voltage is configured to supply power to the relay control module.
The first voltage conversion unit comprises an interface P1, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a transformer T1, a rectifier bridge DB1, a capacitor C1 and a capacitor E1.
One end of a resistor R11 is connected with an alternating current input live wire, a resistor R10, a resistor R9 and a resistor R8 are sequentially connected in series between the other end of the resistor R11 and a port 1 of a transformer T1, one end of a resistor R7 is connected with an alternating current input zero line, a resistor R6, a resistor R5 and a resistor R4 are sequentially connected in series between the other end of the resistor R7 and a port 5 of a transformer T1, a port 9 of the transformer T1 is connected with a port 2 of a rectifier bridge DB1, a port 7 of the transformer T1 is connected with a port 4 of a rectifier bridge DB1, a port 3 of the rectifier bridge DB1 is connected with a positive electrode of a capacitor E1, a port 1 of the rectifier bridge 1 is connected with a negative electrode of a capacitor E1, a capacitor C1 is connected in parallel with two ends of the capacitor E1, a port 3 of the rectifier bridge DB1 outputs a first preset voltage, and a port 1 of the rectifier bridge DB1 is also grounded.
The second voltage conversion unit is used for converting the first preset voltage into a second preset voltage, and the second preset voltage is used for supplying power to the control module, the key module and the pressure and temperature sensing module.
The second voltage conversion unit comprises a voltage conversion chip U3, a capacitor E3, a capacitor C64, a resistor R20, a diode D26, a resistor R19, a resistor R18, a capacitor E2, a capacitor C67, a capacitor C62 and an inductor L4;
the first pin of the voltage conversion chip U3 is connected with the sixth pin through a capacitor C62, the fifth pin of the voltage conversion chip U3 is connected with the fourth pin through a resistor R20, the fifth pin of the voltage conversion chip U3 is further connected with the anode of a capacitor E3, the cathode of a capacitor E3 is grounded, a capacitor C64 is connected in parallel with two ends of a capacitor E3, the anode of a capacitor E3 is further connected with a first preset voltage, the second pin of the voltage conversion chip U3 is grounded, the third pin of the voltage conversion chip U3 is grounded through a resistor R18, the sixth pin of the voltage conversion chip U3 is further connected with one end of an inductor L4, the other end of the inductor L4 is connected with the third pin of the voltage conversion chip U3 through a resistor R19, the sixth pin of the voltage conversion chip U3 is further connected with the cathode of a diode D26, the anode of a diode D26 is grounded, the anode of the inductor L4 and one end of the resistor R6867 connected with the anode of the capacitor E2 and the cathode 2 of the capacitor E2, the capacitor C67 is connected in parallel to the two ends of the capacitor E2, and the anode of the capacitor E2 outputs a second preset voltage.
As shown in fig. 5, the leakage protection module includes a current detection circuit and a leakage feedback circuit, and the leakage protection module is used for protecting the operation of the self-priming pump by measuring the effective current when the self-priming pump operates.
The current detection circuit comprises a capacitor C12, a resistor R17, a resistor R16, a capacitor C11, a comparator LM1, a capacitor C9, a resistor R13, a resistor R14, a resistor R15, a resistor R12 and a capacitor C10.
One end of a resistor R12 is connected with an AC input live wire, the other end of the resistor R12 is connected with a port 3 of a comparator LM1, a capacitor C10 is connected with two ends of the resistor R12 in parallel, one end of a resistor R13 is connected with the AC input live wire, the other end of the resistor R13 is connected with a port 2 of the comparator LM1, a capacitor C9 is connected with two ends of a resistor R13 in parallel, the port 3 of the comparator LM1 is connected with a power supply module through a resistor R15, the port 3 of the comparator LM1 is further grounded through a resistor R14, the port 1 of the comparator LM1 is connected with one end of a resistor R17, the other end of the resistor R17 is grounded through a capacitor C12, the end connected with a resistor R17 and the capacitor C12 is connected with a twenty-ninth pin of a control chip U1, the port 1 of the comparator LM1 is further connected with the port 2 of the comparator LM1 through a resistor R16, and a capacitor C11 is connected with two ends of the resistor R16 in parallel.
After the alternating current is filtered and rectified by an RC circuit, the alternating current is respectively input to the anode and the cathode of the comparator LM1, an output signal of the comparator LM1 is sent to the control chip U1, and the control chip U1 controls the working state of the self-priming pump according to the collected effective current value.
The leakage feedback circuit comprises a resistor R26, a resistor R27, a resistor R28 and a current transformer U5.
The port 1 of the current transformer U5 is connected with the thirty-one pin of the control chip U1, the port 1 of the current transformer U5 is further connected with the port 2 of the current transformer U5 through a resistor R26, the port 2 of the current transformer U5 is connected with a power supply module through a resistor R27, the port 2 of the current transformer U5 is further grounded through a resistor R28, and the model of the current transformer U5 is ZMCT 118A.
The control chip U1 compares the current signal collected by the current detection circuit with the signal collected by the leakage feedback circuit and calculates the effective current, thereby protecting the operation of the self-priming pump.
The effective current value of the self-priming water pump during working is monitored in real time through the leakage protection module, and when the current value is too large, the power supply can be cut off in time, so that the self-priming water pump is protected.
Example two
As shown in fig. 6, the self-priming water pump control method of the present invention includes the steps of:
and S1, converting the input power into preset voltage through the power supply module to supply power to the key module, the control module, the relay control module and the pressure and temperature sensing module.
S2, acquiring the demand information of the user through the key module to generate an adjusting signal, and sending the adjusting signal to the control module;
s3, collecting water pressure and water temperature information through a pressure and temperature sensing module and sending the information to a control module;
s4, the control module processes the received adjusting signal and the water pressure and water temperature information and generates a corresponding control signal;
and S5, the relay control module controls the working state of the self-priming pump according to the control signal.
And S6, measuring the effective current value of the self-priming pump during working through the electric leakage protection module to protect the operation of the self-priming pump.
In step S1, the step of converting the input power into the preset voltage by the power module includes:
s11, converting the input power supply into a first preset voltage, and supplying power to the relay control module through the first preset voltage;
s12, converting the first preset voltage into a second preset voltage through a voltage conversion chip U3, wherein the second preset voltage is used for supplying power to the control module, the key module and the pressure and temperature sensing module.
The specific process of the step S11 is that the input power source is stepped down and then transformed by the transformer T1, the receiving end coil of the transformer T1 generates an alternating current signal, the alternating current signal is rectified by the rectifier bridge DB1 and filtered by the capacitor C1, a first preset voltage of 12V is output, and the relay coil of the relay control module is powered by the first preset voltage.
The specific working principle of the step S12 is that the first preset voltage is rectified, filtered, and then input into the voltage conversion chip U3 through the fifth pin of the voltage conversion chip U3, the voltage conversion chip U3 outputs a second preset voltage of 5V through the sixth pin after voltage reduction processing, and the second preset voltage is used for supplying power to the control module, the key module, and the pressure and temperature sensing module.
With reference to fig. 1 to 6, the specific working process of the present invention is as follows:
a user selects a corresponding mode through the KEYs S1-S3 according to requirements, when one KEY is pressed down, the network interfaces KEY 1-KEY 3 convert a high-level signal into a low-level signal, and the signal is transmitted to the third pin, the second pin and the fifth pin of the control chip U1.
In addition, the pressure and temperature sensing module respectively transmits water pressure information and water temperature information to the control chip U1 through the network interfaces AD _ P and AD _ TMP according to the water pressure information and the water temperature information acquired by the external pressure and temperature sensor of the interface P3.
The control chip U1 generates a corresponding control signal after processing by itself, and the control signal is output to the relay control module through the thirtieth pin of the control signal.
Control signal passes through network interface relay and conveys triode Q1 among the relay control module, and when control signal transmission, triode Q1 switches on, and first preset voltage can make relay K1's coil circular telegram, and then actuation relay K1's contact, and the energy of exchanging the live wire just can transmit the load of self priming pump through interface P1 on for the load of self priming pump begins work.
In addition, the specific process of step S6 is that the ac power is rectified through the RC circuit, and then is input to the positive electrode and the negative electrode of the comparator LM1, the comparator LM1 outputs a current signal and sends the current signal to the control chip U1, and the leakage protection circuit collects the signal through the current transformer and sends the collected signal to the control chip U1.
The control chip U1 calculates the effective current by comparing the current signal collected by the current detection circuit with the signal collected by the leakage feedback circuit,
according to the invention, the water pressure in the water pipe is detected in real time through the pressure and temperature sensing module, so that the control module can control the start and stop of the self-priming pump through the water pressure of the water pipe; the control module and the relay replace a pressure switch which is adopted in the past to control the switch of the water pump, so that the water pump can be controlled through an electric signal, and the automatic opening of the water pump caused by the pressure change of the water pump can be avoided.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (14)
1. A self priming water pump control circuit, comprising:
the key module is used for acquiring the demand information of the user to generate an adjusting signal;
the control module is connected with the key module and used for generating a corresponding control signal according to the adjusting signal acquired by the key module and adjusting the working state of the self-priming pump through the control signal;
the pressure and temperature sensing module is connected with the control module and used for collecting water pressure and water temperature information and sending the water pressure information and the water temperature information to the control module;
the relay control module is connected with the control module and is used for controlling the working state of the self-priming water pump according to a control signal;
and the power supply module is respectively connected with the key module, the control module and the pressure and temperature sensing module, and is used for converting an input power supply into a preset voltage to supply power to the key module, the control module, the relay control module and the pressure and temperature sensing module.
2. The self-priming pump control circuit of claim 1 wherein said self-priming pump control circuit is further defined as
The control module comprises a control chip U1, a reset circuit and a signal conversion chip U2;
the second pin of the control chip U1 is connected with the reset circuit;
the third pin, the fourth pin and the fifth pin of the control chip U1 are all connected with the key module, the fourteenth pin of the control chip U1 is connected with the ninth pin of the signal conversion chip U2, the fifteenth pin of the control chip U1 is connected with the eleventh pin of the signal conversion chip U2, the sixteenth pin of the control chip U1 is connected with the twelfth pin of the signal conversion chip U2, and the thirtieth pin of the control chip U1 is connected with the relay control module.
3. The self-priming water pump control circuit of claim 2 wherein said button module comprises a resistor R3, a resistor R2, a resistor R1, a button S1, a button S2, and a button S3;
one end of the key S1 is connected with a third pin of the control chip U1, the other end of the key S1 is grounded, one end of the key S1 connected with the control chip U1 is also connected with the power module through a resistor R3, one end of the key S2 is connected with a fourth pin of the control chip U1, the other end of the key S2 is grounded, one end of the key S2 connected with the control chip U1 is also connected with the power module through a resistor R2, one end of the key S3 is connected with a fifth pin of the control chip U1, the other end of the key S3 is grounded, and one end of the key S3 connected with the control chip U1 is also connected with the power module through a resistor R1.
4. The self-priming water pump control circuit of claim 2 wherein said pressure and temperature sensing module comprises interface P3, resistor R21, resistor R22, resistor R23, capacitor C2 and capacitor C3;
port 1 of interface P3 is connected with power module through resistance R23, and port 2 of interface P3 passes through electric capacity C2 ground connection, and port 3 of interface P3 passes through electric capacity C3 ground connection, and port 2 of interface P3 still is connected with the twenty-ninth pin of control chip U1, port 4 of interface P3 with resistance R22's one end is connected, the other end of resistance R22 passes through resistance R21 ground connection, and port 4 of interface P3 still is connected with the twenty-eighth pin of control chip U1, and interface P3 still external pressure and temperature sensor.
5. The self-priming water pump control circuit of claim 2 wherein said relay control module includes relay K1, diode D2, resistor R29, transistor Q1 and resistor R33;
one end of a resistor R33 is connected with the thirtieth pin of the control chip U1, the other end of a resistor R33 is connected with the base electrode of a triode Q1, the emitter electrode of the triode Q1 is grounded, the collector electrode of the triode Q1 is connected with the anode electrode of a diode D2, the cathode electrode of the diode D2 is connected with a port 4 of a relay K1, a port 4 of the relay K1 is further connected with a power supply module, the collector electrode of the triode Q1 is further connected with one end of a resistor R29, the other end of the resistor R29 is connected with a port 3 of a relay K1, and a port 1 and a port 2 of the relay K1 are both connected with the power supply module.
6. The self-priming water pump control circuit of claim 1 wherein the power module includes a first voltage conversion unit, the first voltage conversion unit being configured to convert an input power source into a first predetermined voltage, the first predetermined voltage being configured to power the relay control module;
the first voltage conversion unit comprises an interface P1, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a transformer T1, a rectifier bridge DB1, a capacitor C1 and a capacitor E1;
one end of a resistor R11 is connected with an alternating current input live wire, a resistor R10, a resistor R9 and a resistor R8 are sequentially connected in series between the other end of the resistor R11 and a port 1 of a transformer T1, one end of a resistor R7 is connected with an alternating current input zero line, a resistor R6, a resistor R5 and a resistor R4 are sequentially connected in series between the other end of the resistor R7 and a port 5 of a transformer T1, a port 9 of the transformer T1 is connected with a port 2 of a rectifier bridge DB1, a port 7 of the transformer T1 is connected with a port 4 of a rectifier bridge DB1, a port 3 of the rectifier bridge DB1 is connected with the positive electrode of a capacitor E1, a port 1 of the rectifier bridge 1 is connected with the negative electrode of a capacitor E1, a capacitor C1 is connected in parallel with two ends of the capacitor E1, a port 3 of the rectifier bridge DB1 outputs a first preset voltage, and a port 1 of the rectifier bridge DB1 is also grounded;
port 1 of interface P1 is connected with port 1 of transformer T1, port 2 and port 3 of interface P1 are all connected with port 5 of transformer T1, port 4 of interface P1 is connected with relay control module, and interface P1 is used for being connected with the self priming pump.
7. The self-priming water pump control circuit according to claim 6, wherein the power module further comprises a second voltage conversion unit, the second voltage conversion unit is configured to convert the first preset voltage into a second preset voltage, and the second preset voltage is configured to supply power to the control module, the key module, and the pressure and temperature sensing module;
the second voltage conversion unit comprises a voltage conversion chip U3, a capacitor E3, a capacitor C64, a resistor R20, a diode D26, a resistor R19, a resistor R18, a capacitor E2, a capacitor C67, a capacitor C62 and an inductor L4;
the first pin of the voltage conversion chip U3 is connected with the sixth pin through a capacitor C62, the fifth pin of the voltage conversion chip U3 is connected with the fourth pin through a resistor R20, the fifth pin of the voltage conversion chip U3 is further connected with the anode of a capacitor E3, the cathode of a capacitor E3 is grounded, a capacitor C64 is connected in parallel with two ends of a capacitor E3, the anode of a capacitor E3 is further connected with a first preset voltage, the second pin of the voltage conversion chip U3 is grounded, the third pin of the voltage conversion chip U3 is grounded through a resistor R18, the sixth pin of the voltage conversion chip U3 is further connected with one end of an inductor L4, the other end of the inductor L4 is connected with the third pin of the voltage conversion chip U3 through a resistor R19, the sixth pin of the voltage conversion chip U3 is further connected with the cathode of a diode D26, the anode of a diode D26 is grounded, the anode of the inductor L4 and one end of the resistor R6867 connected with the anode of the capacitor E2 and the cathode 2 of the capacitor E2, the capacitor C67 is connected in parallel to the two ends of the capacitor E2, and the anode of the capacitor E2 outputs a second preset voltage.
8. The self-priming water pump control circuit of claim 2, further comprising an earth leakage protection module for protecting the operation of the self-priming water pump by measuring the effective current when the self-priming water pump is operating;
the leakage protection module comprises a current detection circuit and a leakage feedback circuit;
the current detection circuit comprises a capacitor C12, a resistor R17, a resistor R16, a capacitor C11, a comparator LM1, a capacitor C9, a resistor R13, a resistor R14, a resistor R15, a resistor R12 and a capacitor C10;
one end of a resistor R12 is connected with an alternating current input live wire, the other end of the resistor R12 is connected with a port 3 of a comparator LM1, a capacitor C10 is connected at two ends of the resistor R12 in parallel, one end of a resistor R13 is connected with the alternating current input live wire, the other end of the resistor R13 is connected with a port 2 of a comparator LM1, a capacitor C9 is connected at two ends of a resistor R13 in parallel, the port 3 of the comparator LM1 is connected with a power supply module through a resistor R15, the port 3 of the comparator LM1 is also grounded through a resistor R14, the port 1 of the comparator LM1 is connected with one end of a resistor R17, the other end of the resistor R17 is grounded through a capacitor C12, the end connected with a resistor R17 and the capacitor C12 is connected with a twenty-ninth pin of a control chip U1, the port 1 of the comparator LM1 is also connected with the port 2 of the comparator LM1 through a resistor R16, and a capacitor C11 is connected at two ends of a resistor R16 in parallel;
the leakage feedback circuit comprises a resistor R26, a resistor R27, a resistor R28 and a current transformer U5;
a port 1 of the current transformer U5 is connected with a thirty-first pin of the control chip U1, a port 1 of the current transformer U5 is also connected with a port 2 of the current transformer U5 through a resistor R26, a port 2 of the current transformer U5 is connected with a power supply module through a resistor R27, and a port 2 of the current transformer U5 is also grounded through a resistor R28;
the control chip U1 compares the current signal collected by the current detection circuit with the signal collected by the leakage feedback circuit and calculates the effective current, thereby protecting the operation of the self-priming pump.
9. The self-priming water pump control circuit according to claim 2, further comprising a display module, wherein the display module is configured to display an operating state of the self-priming water pump;
the display module comprises an LCD screen, and the LCD screen is connected with the signal conversion chip U2.
10. A self-priming water pump, characterized in that, including load and claim 1 ~ 9 any one of self-priming water pump control circuit.
11. A self-priming water pump control method is based on the self-priming water pump control circuit of any one of claims 1 to 9, and is characterized by comprising the following steps:
acquiring the demand information of a user through a key module to generate an adjusting signal, and sending the adjusting signal to a control module;
the water pressure and water temperature information is collected through the pressure and temperature sensing module and is sent to the control module;
the control module processes the received adjusting signal, the water pressure and the water temperature information and generates a corresponding control signal;
and the relay control module controls the working state of the self-priming pump according to the control signal.
12. The self-primer pump control method of claim 11, further comprising the steps of:
the input power supply is converted into preset voltage through the power supply module to supply power for the key module, the control module, the relay control module and the pressure and temperature sensing module.
13. The self-primer pump control method of claim 12, wherein the step of converting the input power supply to a predetermined voltage via the power module comprises:
converting an input power supply into a first preset voltage, and supplying power to the relay control module through the first preset voltage;
and converting the first preset voltage into a second preset voltage through a voltage conversion chip U3, wherein the second preset voltage is used for supplying power to the control module, the key module and the pressure and temperature sensing module.
14. The self-primer pump control method of claim 12, further comprising the steps of:
the effective current value of the self-priming pump during working is measured through the leakage protection module to protect the operation of the self-priming pump.
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