Pump control circuit

Abstract

The utility model discloses a pump control circuit comprising a voltage detection circuit, an input end of which is connected with a power supply end of an electromagnetic pump and an output end of which is connected with a master control circuit; the output end of the main control circuit is connected with the input end of the switching circuit; and the output end of the switching circuit is connected with the control end of the electromagnetic pump. The main control circuit obtains the working voltage of the electromagnetic pump in time so as to judge the current working state of the electromagnetic pump, then the action of the electromagnetic pump is controlled through the switching circuit, the current state of the electromagnetic pump is effectively combined for control, and the control efficiency of the electromagnetic pump is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pump driving, in particular to a pump control circuit. Background Art

[0002] The electromagnetic pump (SOLENOID PUMP) is a liquid pump that directly combines power and pump body into one. The working principle of the electromagnetic pump is similar to that of an ordinary solenoid valve. It uses alternating current as its working power. The current forms an alternating fixed magnetic field through the electromagnetic winding, which interacts with the movable pump body. In the prior art, the control of the electromagnetic pump is either manual or automatic; however, in the automatic control, it is only unilaterally controlled by outputting a control signal to the electromagnetic pump through the main control, which makes it impossible to judge the current action state of the electromagnetic pump, resulting in invalid output and reducing the control efficiency of the electromagnetic pump. Utility Model Content

[0003] Based on this, it is necessary to propose a pump control circuit to address the above problems.

[0004] A pump control circuit comprising:

[0005] A voltage detection circuit, the input end of which is connected to the power supply end of the electromagnetic pump, and the output end of which is connected to the main control circuit, for obtaining the current working voltage of the electromagnetic pump and outputting it to the main control circuit;

[0006] The main control circuit, whose output end is connected to the input end of the switch circuit, is used to receive the working voltage and output a control signal to the switch circuit;

[0007] The switch circuit has an output end connected to the control end of the electromagnetic pump and is used to receive the control signal and control the action of the electromagnetic pump.

[0008] In one embodiment, the pump control circuit further comprises:

[0009] The indicating circuit has an input end connected to the output end of the main control circuit, and is used to receive a second control signal output by the main control circuit and light up to indicate the working state of the main control circuit.

[0010] In one embodiment, the voltage detection circuit includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode, a second diode and an optical coupler;

[0011] Both ends of the first resistor are connected to the power supply end of the electromagnetic pump, one end of the second resistor is connected to one end of the first resistor, and the other end of the second resistor is connected to one end of the fourth resistor;

[0012] One end of the third resistor is connected to the other end of the first resistor, and the other end of the third resistor is connected to the anode of the second diode;

[0013] The cathode of the second diode is connected to the other end of the fourth resistor;

[0014] The anode of the first diode is connected to the anode of the second diode, and the cathode of the first diode is connected to an end of the second resistor close to the first resistor;

[0015] The anode of the optocoupler is connected to one end of the fourth resistor, the cathode of the optocoupler is connected to the other end of the fourth resistor, the collector of the optocoupler is connected to an external power supply and an input end of the main control circuit, and the emitter of the optocoupler is grounded.

[0016] In one embodiment, the voltage detection circuit further includes: a first capacitor and a second capacitor;

[0017] One end of the first capacitor is connected in parallel with the first resistor;

[0018] One end of the second capacitor is connected to the collector of the optocoupler, and the other end of the second capacitor is connected to the emitter of the optocoupler.

[0019] In one embodiment, the voltage detection circuit further includes: a third diode;

[0020] The anode of the third diode is connected to an end of the first capacitor away from the power supply end of the electromagnetic pump, and the cathode of the third diode is connected to an end of the second resistor close to the first resistor.

[0021] In one embodiment, the switch circuit includes: a relay, a triode, a fifth resistor, a sixth resistor and a seventh resistor;

[0022] The normally open contact and the normally closed contact of the relay are both connected to the control end of the electromagnetic pump and the external power supply, the common end of the relay is connected to the input end of the voltage detection circuit, one end of the coil of the relay is connected to the collector of the transistor, and the other end of the coil of the relay is connected to the external power supply;

[0023] The base of the transistor is connected to one end of the fifth resistor, and the emitter of the transistor is grounded;

[0024] The other end of the fifth resistor is connected to one end of the sixth resistor, and the other end of the sixth resistor is grounded;

[0025] One end of the seventh resistor is connected to the other end of the coil of the relay, and the other end of the seventh resistor is connected to the collector of the transistor.

[0026] In one embodiment, the switch circuit further includes: a fourth diode;

[0027] The anode of the fourth diode is connected to the collector of the transistor, and the cathode of the fourth diode is connected to the other end of the coil of the relay.

[0028] In one embodiment, the main control circuit includes: a main control chip, a first switch and a second switch;

[0029] The input end of the main control chip is connected to the output end of the voltage detection circuit, and the first output end of the main control chip is connected to the input end of the switch circuit;

[0030] One end of the first switch is connected to the first control end of the main control chip, and the other end is grounded;

[0031] One end of the second switch is connected to the second control end of the main control chip, and the other end of the second switch is grounded.

[0032] In one embodiment, the indicating circuit comprises: an indicator light and an eighth resistor;

[0033] One end of the eighth resistor is connected to the second output end of the main control chip, the other end of the eighth resistor is connected to the cathode of the indicator light, and the anode of the indicator light is connected to an external power supply.

[0034] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0035] The present application obtains the current working voltage of the electromagnetic pump through a voltage detection circuit and outputs it to the main control circuit; the main control circuit receives the working voltage and outputs a control signal to the switch circuit; the switch circuit receives the control signal and controls the action of the electromagnetic pump. The present application enables the main control circuit to obtain the working voltage of the electromagnetic pump in a timely manner to determine its current working state, and then controls the action of the electromagnetic pump through the switch circuit, effectively combining the current state of the electromagnetic pump for control, and improving the control efficiency of the electromagnetic pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] in:

[0038] Figure 1is a structural block diagram of a pump control circuit in one embodiment;

[0039] Figure 2 is a structural block diagram of a pump control circuit in another embodiment;

[0040] Figure 3 is a circuit diagram of a voltage detection circuit and a main control circuit in one embodiment;

[0041] Figure 4 is a partial circuit diagram of a main control circuit in one embodiment;

[0042] Figure 5 is another partial circuit diagram of a main control circuit in one embodiment;

[0043] Figure 6 FIG. 1 is a circuit diagram indicating a circuit in one embodiment. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] An electromagnetic pump (SOLENOID PUMP) is a liquid pump that directly combines power and a pump body into one. The working principle of an electromagnetic pump is similar to that of an ordinary solenoid valve. It uses alternating current as its working power. The current passes through the electromagnetic winding to form an alternating fixed magnetic field, which interacts with the movable pump body and drives the pump body to vibrate. In the prior art, electromagnetic pumps are controlled manually or automatically; however, in automatic control, it only unilaterally outputs control signals to the electromagnetic pump through the main control, which makes it impossible to judge the current operating state of the electromagnetic pump, resulting in invalid output and reducing the control efficiency of the electromagnetic pump. In order to solve the above technical problems, the present application provides a pump control circuit, such as Figure 1As shown, it includes: a voltage detection circuit 10, a main control circuit 30 and a main control circuit 30, wherein the input end of the voltage detection circuit 10 is connected to the power supply end of the electromagnetic pump, and the output end is connected to the main control circuit 30, for obtaining the current working voltage of the electromagnetic pump and outputting it to the main control circuit 30; the output end of the main control circuit 30 is connected to the input end of the switch circuit 20, for receiving the working voltage and outputting a control signal to the switch circuit 20; the output end of the switch circuit 20 is connected to the control end of the electromagnetic pump, for receiving the control signal and controlling the action of the electromagnetic pump. The present application obtains the current working voltage of the electromagnetic pump through the voltage detection circuit and outputs it to the main control circuit; the main control circuit receives the working voltage and outputs a control signal to the switch circuit; the switch circuit receives the control signal and controls the action of the electromagnetic pump. The present application enables the main control circuit to obtain the working voltage of the electromagnetic pump in time to judge its current working state, and then control the action of the electromagnetic pump through the switch circuit, effectively combining the current state of the electromagnetic pump for control, and improving the control efficiency of the electromagnetic pump.

[0046] In one embodiment, Figure 2 As shown, the pump control circuit further includes: an indication circuit 40, whose input end is connected to the output end of the main control circuit 30, for receiving a second control signal output by the main control circuit 30, and lighting up to indicate the working status of the main control circuit 30.

[0047] In one embodiment, Figure 3 As shown, the voltage detection circuit 10 includes: a first resistor R2, a second resistor R32, a third resistor R34, a fourth resistor R9, a first diode VD2, a second diode DZ1 and an optical coupler J1; both ends of the first resistor R2 are connected to the power supply end of the electromagnetic pump, one end of the second resistor R32 is connected to one end of the first resistor R2, and the other end of the second resistor R32 is connected to one end of the fourth resistor R9; one end of the third resistor R34 is connected to the other end of the first resistor R2, and the other end of the third resistor R34 is connected to the second diode D Z1 is connected; the cathode of the second diode DZ1 is connected to the other end of the fourth resistor R9; the anode of the first diode VD2 is connected to the anode of the second diode DZ1, and the cathode of the first diode VD2 is connected to an end of the second resistor R32 close to the first resistor R2; the anode of the optical coupler J1 is connected to one end of the fourth resistor R9, the cathode of the optical coupler J1 is connected to the other end of the fourth resistor R9, the collector of the optical coupler J1 is connected to the external power supply and the input end of the main control circuit 30, and the emitter of the optical coupler J1 is grounded.

[0048] In one embodiment, Figure 3 As shown, the voltage detection circuit 10 also includes: a first capacitor CY1 and a second capacitor C3; wherein, one end of the first capacitor CY1 is connected in parallel with the first resistor R2; one end of the second capacitor C3 is connected to the collector of the optocoupler J1, and the other end of the second capacitor C3 is connected to the emitter of the optocoupler J1.

[0049] In one embodiment, Figure 3 As shown, the voltage detection circuit 10 also includes: a third diode D3; wherein the anode of the third diode D3 is connected to an end of the first capacitor CY1 away from the power supply end of the electromagnetic pump, and the cathode of the third diode D3 is connected to an end of the second resistor R32 close to the first resistor R2.

[0050] In one embodiment, Figure 3 As shown, the switch circuit 20 includes: a relay JK1, a transistor Q7, a fifth resistor R35, a sixth resistor R36 and a seventh resistor R12; wherein the normally open contact 4 and the normally closed contact 5 of the relay JK1 are both connected to the control end of the electromagnetic pump and the external power supply, the common end 3 of the relay JK1 is connected to the input end of the voltage detection circuit 10, one end of the coil of the relay JK1 is connected to the collector of the transistor Q7, and the other end of the coil of the relay JK1 is connected to the external power supply; the base of the transistor Q7 is connected to one end of the fifth resistor R35, and the emitter of the transistor Q7 is grounded; the other end of the fifth resistor R35 is connected to one end of the sixth resistor R36, and the other end of the sixth resistor R36 is grounded; one end of the seventh resistor R12 is connected to the other end of the coil of the relay JK1, and the other end of the seventh resistor R12 is connected to the collector of the transistor Q7.

[0051] In one embodiment, Figure 3 As shown, the switch circuit 20 further includes: a fourth diode VD3; wherein, the anode of the fourth diode VD3 is connected to the collector of the transistor Q7, and the cathode of the fourth diode VD3 is connected to the other end of the coil of the relay JK1.

[0052] In one embodiment, Figure 4 and Figure 5The main control circuit 30 includes: a main control chip U3, a first switch SW1 and a second switch SW2; wherein the input terminal P3.2 of the main control chip U3 is connected to the output terminal of the voltage detection circuit 10, and the first output terminal P1.6 of the main control chip U3 is connected to the input terminal of the switch circuit 20; one end of the first switch SW1 is connected to the first control terminal P1.3 of the main control chip U3, and the other end is grounded; one end of the second switch SW2 is connected to the second control terminal P5.5 of the main control chip U3, and the other end is grounded.

[0053] In one embodiment, Figure 6 As shown, the indication circuit 40 includes: an indicator light LED1 and an eighth resistor R24; wherein, one end of the eighth resistor R24 ​​is connected to the second output end P5.4 of the main control chip U3, the other end of the eighth resistor R24 ​​is connected to the cathode of the indicator light LED1, and the anode of the indicator light LED1 is connected to an external power supply.

[0054] The present application obtains the current working voltage of the electromagnetic pump through a voltage detection circuit and outputs it to the main control circuit; the main control circuit receives the working voltage and outputs a control signal to the switch circuit; the switch circuit receives the control signal and controls the action of the electromagnetic pump. The present application enables the main control circuit to obtain the working voltage of the electromagnetic pump in a timely manner to determine its current working state, and then controls the action of the electromagnetic pump through the switch circuit, effectively combining the current state of the electromagnetic pump for control, and improving the control efficiency of the electromagnetic pump.

[0055] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A pump control circuit, characterized in that: include: A voltage detection circuit, wherein the input end is connected to the power supply end of the electromagnetic pump, and the output end is connected to the main control circuit, for obtaining the current working voltage of the electromagnetic pump and outputting it to the main control circuit; wherein the voltage detection circuit comprises: a first resistor, a second resistor, a third resistor, a fourth resistor, a first diode, a second diode and an optical coupler; both ends of the first resistor are connected to the power supply end of the electromagnetic pump, one end of the second resistor is connected to one end of the first resistor, and the other end of the second resistor is connected to one end of the fourth resistor; one end of the third resistor is connected to the other end of the first resistor, and the other end of the third resistor is connected to the anode of the second diode; the cathode of the second diode is connected to the other end of the fourth resistor; the anode of the first diode is connected to the anode of the second diode, and the cathode of the first diode is connected to an end of the second resistor close to the first resistor; the anode of the optical coupler is connected to one end of the fourth resistor, the cathode of the optical coupler is connected to the other end of the fourth resistor, the collector of the optical coupler is connected to the external power supply and the input end of the main control circuit, and the emitter of the optical coupler is grounded; The main control circuit, whose output end is connected to the input end of the switch circuit, is used to receive the working voltage and output a control signal to the switch circuit; The switch circuit has an output end connected to the control end of the electromagnetic pump and is used to receive the control signal and control the action of the electromagnetic pump.

2. The pump control circuit according to claim 1, characterized in that: Also includes: The indicating circuit has an input end connected to the output end of the main control circuit, and is used to receive a second control signal output by the main control circuit and light up to indicate the working state of the main control circuit.

3. The pump control circuit according to claim 1, characterized in that: The voltage detection circuit further includes: a first capacitor and a second capacitor; One end of the first capacitor is connected in parallel with the first resistor; One end of the second capacitor is connected to the collector of the optocoupler, and the other end of the second capacitor is connected to the emitter of the optocoupler.

4. The pump control circuit according to claim 3, characterized in that: The voltage detection circuit further includes: a third diode; The anode of the third diode is connected to an end of the first capacitor away from the power supply end of the electromagnetic pump, and the cathode of the third diode is connected to an end of the second resistor close to the first resistor.

5. The pump control circuit according to claim 1, characterized in that: The switch circuit comprises: a relay, a triode, a fifth resistor, a sixth resistor and a seventh resistor; The normally open contact and the normally closed contact of the relay are both connected to the control end of the electromagnetic pump and the external power supply, the common end of the relay is connected to the input end of the voltage detection circuit, one end of the coil of the relay is connected to the collector of the transistor, and the other end of the coil of the relay is connected to the external power supply; The base of the transistor is connected to one end of the fifth resistor, and the emitter of the transistor is grounded; The other end of the fifth resistor is connected to one end of the sixth resistor, and the other end of the sixth resistor is grounded; One end of the seventh resistor is connected to the other end of the coil of the relay, and the other end of the seventh resistor is connected to the collector of the transistor.

6. The pump control circuit according to claim 5, characterized in that: The switch circuit further includes: a fourth diode; The anode of the fourth diode is connected to the collector of the transistor, and the cathode of the fourth diode is connected to the other end of the coil of the relay.

7. The pump control circuit according to claim 2, characterized in that: The main control circuit includes: a main control chip, a first switch and a second switch; The input end of the main control chip is connected to the output end of the voltage detection circuit, and the first output end of the main control chip is connected to the input end of the switch circuit; One end of the first switch is connected to the first control end of the main control chip, and the other end is grounded; One end of the second switch is connected to the second control end of the main control chip, and the other end of the second switch is grounded.

8. The pump control circuit according to claim 7, characterized in that: The indicating circuit comprises: an indicating light and an eighth resistor; One end of the eighth resistor is connected to the second output end of the main control chip, the other end of the eighth resistor is connected to the cathode of the indicator light, and the anode of the indicator light is connected to an external power supply.

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