A circuit for reducing the heat generation of the solenoid valve working coil
By designing a circuit that utilizes transistors and field effect tubes, the solenoid valve working voltage can be switched, thereby reducing the heat generation of the coil, solving the heat problem caused by the solenoid valve working for a long time, and improving the stability of the control circuit.
Patent Information
- Application Number
- CN202110478575.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-04-30
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2041-04-30
AI Technical Summary
In the long-term working state, the existing solenoid valves cause a large amount of heat to be generated due to the continuous current passing through the coil, which leads to the problem of hot heat.
Design a circuit to switch the working voltage of the solenoid valve through the coordination of transistors and field effect tubes, and use high and low logic levels to switch from 24VDC to 12VDC, reduce the heat generation of the coil, and increase the control circuit through the coordinated coordination of inductors and capacitors. stability.
It effectively reduces the heat generation of the solenoid valve working coil, realizes that the solenoid valve will not heat up after working for a long time, and the control circuit is stable and reliable, and the structure is simple.
Smart Images
Figure CN113054970B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of electromagnetic valves, and in particular to a circuit for reducing the heat generated by a working coil of an electromagnetic valve. Background Art
[0002] The existing solenoid valve on-off implementation method is: use a triode or MOS field effect tube electronic switch to control the on-off of the solenoid valve with a series 24VDC voltage. Since the internal coil of the solenoid valve continuously passes current during the solenoid valve is energized and attracted, the coil will generate a lot of heat under long-term working conditions, causing the solenoid valve to heat up. Summary of the invention
[0003] The technical problem to be solved by the present invention is to provide a circuit for reducing the heat generated by the working coil of a solenoid valve, so as to overcome the deficiencies in the above-mentioned prior art.
[0004] The technical solution of the present invention to solve the above technical problems is as follows: a circuit for reducing the heat generation of a solenoid valve working coil, comprising a 001 port, a resistor R91, a resistor R97, a transistor Q15, a resistor R85, a resistor R87, a field effect transistor Q10, a diode D8 and a diode D14, wherein the 001 port is connected in series with the resistor R97 and then grounded, the base of the transistor Q15 is connected to one end of the resistor R91, and the other end of the resistor R91 is connected to the common end of the 001 port and the resistor R97; the collector of the transistor Q15 is connected to one end of the resistor R87, and the resistor R85 is connected to the collector of the transistor Q15. The other end of R87 is connected to the gate of the field effect transistor Q10, and the emitter of the transistor Q15 is grounded; the source of the field effect transistor Q10 is connected to 24VDC, the drain of the field effect transistor Q10 is connected to the anode of the diode D14, and the two ends of the resistor R85 are respectively connected to the gate and source of the field effect transistor Q10; the cathode of the diode D14 is connected to the 1# pin of the solenoid valve terminal J4; the cathode of the diode D8 is connected to the 1# pin of the solenoid valve terminal J4, and the anode of the diode D8 is connected to 12VDC; the 2# pin of the solenoid valve terminal J4 is grounded through the control circuit.
[0005] The beneficial effects of the present invention are:
[0006] In the startup phase, when the 001 port inputs a high level, the transistor Q15 is turned on, and the gate voltage of the field effect transistor Q10 connected to the resistors R85 and R87 becomes low level, the field effect transistor Q10 is turned on, and the 24VDC power supply voltage is connected to the 1# pin of the solenoid valve terminal J4 through the field effect transistor Q10 and the diode D14. At the same time, when the 002 port inputs a high level, the solenoid valve obtains the 24VDC voltage, and the solenoid valve starts to work; on the contrary, when the 001 port inputs a low level, the transistor Q15 is turned off, and the gate voltage of the field effect transistor Q10 connected to the resistors R85 and R87 becomes low level, the field effect transistor Q10 is turned on, and the 24VDC power supply voltage is connected to the 1# pin of the solenoid valve terminal J4 through the field effect transistor Q10 and the diode D14. The gate voltage of the field effect transistor Q10 connected to R87 becomes a high level, the field effect transistor Q10 is turned off, and 12VDC is supplied to the 1# pin of the solenoid valve terminal J4 through the diode D8. At the same time, the 002 port inputs a high level, the solenoid valve obtains a 12VDC voltage, and the solenoid valve keeps working; the solenoid valve is switched from 24VDC to 12VDC working voltage through high and low logic levels, so that the solenoid valve can work for a long time without heating, that is, the heat generated by the solenoid valve working coil is effectively reduced, the control circuit is stable and reliable, and the circuit structure is simple.
[0007] Based on the above technical solution, the present invention can also be improved as follows.
[0008] Furthermore, the control circuit includes port 002, resistor R98, resistor R92, field effect transistor Q14 and capacitor C71. Port 002 is connected in series with resistor R98 and then grounded. The gate of field effect transistor Q14 is connected to one end of resistor R92, and the other end of resistor R92 is connected to port 002; the source of field effect transistor Q14 is grounded, and the drain of field effect transistor Q14 is connected to pin 2# of solenoid valve terminal J4; the two ends of capacitor C71 are respectively connected to the source and drain of field effect transistor Q14.
[0009] The above further beneficial effects are: resistor R98, resistor R92, field effect transistor Q14 and capacitor C71 form a solenoid valve on and off control hardware circuit, port 002 is connected to the logic level output pin of the microcontroller, and when a high level is input, the field effect transistor Q14 is controlled to be turned on, and then the solenoid valve is turned on and operated, and when both port 001 and port 002 are input with a low level, the transistor Q15 is turned off, the field effect transistor Q10 is turned off, and the field effect transistor Q14 is turned off, and the working voltage of the solenoid valve is 0.
[0010] Furthermore, it also includes an inductor L7, an inductor L10 and a capacitor C68, one end of the inductor L7 is connected to the common end of the cathode of the diode D8 and the cathode of the diode D14, the other end of the inductor L7 is connected to the 1# pin of the solenoid valve terminal J4, one end of the inductor L10 is connected to the drain of the field effect transistor Q14, the other end of the inductor L10 is connected to the 2# pin of the solenoid valve terminal J4, one end of the capacitor C68 is connected to the 1# pin of the solenoid valve terminal J4 and the common end of the inductor L7, and the other end of the capacitor C68 is connected to the 2# pin of the solenoid valve terminal J4 and the common end of the inductor L10.
[0011] The above further beneficial effect is that the inductor L7, the inductor L10 and the capacitor C68 cooperate with each other to play a matching filtering role, thereby improving the stability of the control circuit.
[0012] Furthermore, a diode D12 is included, wherein the anode of the diode D12 is connected to the drain of the field effect transistor Q14, and the cathode of the diode D12 is connected to the cathode of the diode D8.
[0013] A further beneficial effect of the above is that the diode D12 plays a freewheeling role when the solenoid valve is turned off. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The electrical schematic diagram of the circuit for reducing the heat generated by the working coil of the solenoid valve according to the present invention. DETAILED DESCRIPTION
[0015] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.
[0016] Example 1
[0017] like Figure 1As shown, a circuit for reducing the heat generation of a solenoid valve working coil includes a 001 port, a resistor R91, a resistor R97, a transistor Q15, a resistor R85, a resistor R87, a field effect transistor Q10, a diode D8 and a diode D14. The 001 port is connected in series with the resistor R97 and then grounded. The base of the transistor Q15 is connected to one end of the resistor R91, and the other end of the resistor R91 is connected to the common end of the 001 port and the resistor R97; the collector of the transistor Q15 is connected to one end of the resistor R87, and the other end of the resistor R87 is connected to the common end of the 001 port and the resistor R97. The gate of the field effect tube Q10 is connected, and the emitter of the transistor Q15 is grounded; the source of the field effect tube Q10 is connected to 24VDC, the drain of the field effect tube Q10 is connected to the anode of the diode D14, and the two ends of the resistor R85 are respectively connected to the gate and source of the field effect tube Q10; the cathode of the diode D14 is connected to the 1# pin of the solenoid valve terminal J4; the cathode of the diode D8 is connected to the 1# pin of the solenoid valve terminal J4, and the anode of the diode D8 is connected to 12VDC; the 2# pin of the solenoid valve terminal J4 is grounded through the control circuit;
[0018] The workflow is as follows:
[0019] In the startup phase, the 001 port inputs a high level, the transistor Q15 is turned on, the gate voltage of the field effect transistor Q10 connected to the resistor R85 and the resistor R87 becomes a low level, the field effect transistor Q10 is turned on, and the 24VDC power supply voltage is connected to the 1# pin of the solenoid valve terminal J4 through the field effect transistor Q10 and the diode D14. At the same time, the 002 port inputs a high level, the solenoid valve obtains the 24VDC voltage, and the solenoid valve starts to work; on the contrary, when the 001 port inputs a low level, the transistor Q15 is turned off, and the gate voltage of the field effect transistor Q10 connected to the resistor R85 and the resistor R87 is turned on. , the gate voltage of the field effect transistor Q10 connected to the resistor R87 becomes a high level, the field effect transistor Q10 is turned off, and 12VDC is supplied to the 1# pin of the solenoid valve terminal J4 through the diode D8. At the same time, the 002 port inputs a high level, the solenoid valve obtains a 12VDC voltage, and the solenoid valve keeps working; the solenoid valve is switched between 24VDC and 12VDC working voltages through high and low logic levels, so that the solenoid valve can work for a long time without heating, that is, the heat generated by the solenoid valve working coil is effectively reduced, and the control circuit is stable and reliable.
[0020] Example 2
[0021] like Figure 1 As shown, this embodiment is a further improvement on the basis of embodiment 1, and the details are as follows:
[0022] The control circuit includes port 002, resistor R98, resistor R92, field effect transistor Q14 and capacitor C71. Port 002 is connected in series with resistor R98 and then grounded. The gate of field effect transistor Q14 is connected to one end of resistor R92, and the other end of resistor R92 is connected to port 002. The source of field effect transistor Q14 is grounded, and the drain of field effect transistor Q14 is connected to pin 2# of electromagnetic valve terminal J4. The two ends of capacitor C71 are respectively connected to the source and drain of field effect transistor Q14.
[0023] Resistor R98, resistor R92, field effect transistor Q14 and capacitor C71 form the solenoid valve on and off control hardware circuit. Port 002 is connected to the logic level output pin of the microcontroller. When a high level is input, the field effect transistor Q14 is controlled to be turned on, and then the solenoid valve is turned on and operated. When both port 001 and port 002 are input with a low level, transistor Q15 is turned off, field effect transistor Q10 is turned off, field effect transistor Q14 is turned off, and the working voltage of the solenoid valve is 0.
[0024] Example 3
[0025] like Figure 1 As shown, this embodiment is a further improvement on the basis of embodiment 2, and the details are as follows:
[0026] The circuit for reducing the heat generated by the working coil of the solenoid valve also includes an inductor L7, an inductor L10 and a capacitor C68. One end of the inductor L7 is connected to the common end of the cathode of the diode D8 and the cathode of the diode D14, the other end of the inductor L7 is connected to the 1# pin of the solenoid valve terminal J4, one end of the inductor L10 is connected to the drain of the field effect transistor Q14, the other end of the inductor L10 is connected to the 2# pin of the solenoid valve terminal J4, one end of the capacitor C68 is connected to the 1# pin of the solenoid valve terminal J4 and the common end of the inductor L7, and the other end of the capacitor C68 is connected to the 2# pin of the solenoid valve terminal J4 and the common end of the inductor L10; the inductor L7, the inductor L10 and the capacitor C68 cooperate to play a matching filtering role.
[0027] Example 4
[0028] like Figure 1 As shown, this embodiment is a further improvement on the basis of embodiment 3, and the details are as follows:
[0029] The circuit for reducing the heat generated by the solenoid valve working coil also includes a diode D12. The anode of the diode D12 is connected to the drain of the field effect transistor Q14, and the cathode of the diode D12 is connected to the cathode of the diode D8. When the solenoid valve is turned off, the diode D12 plays a freewheeling role.
[0030] The control logic true value, transistor (or MOS tube) working state and solenoid valve control working state and voltage are as follows:
[0031]
[0032]
[0033] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.
Claims
1. A circuit for reducing the heat generated by a solenoid valve working coil, characterized in that: It includes a 001 port, a resistor R91, a resistor R97, a transistor Q15, a resistor R85, a resistor R87, a field effect transistor Q10, a diode D8 and a diode D14. The 001 port is connected in series with the resistor R97 and then grounded. The base of the transistor Q15 is connected to one end of the resistor R91, and the other end of the resistor R91 is connected to the common end of the 001 port and the resistor R97; the collector of the transistor Q15 is connected to one end of the resistor R87, and the other end of the resistor R87 is connected to the gate of the field effect transistor Q10. The emitter of the transistor Q15 is grounded; the source of the field effect tube Q10 is connected to 24VDC, the drain of the field effect tube Q10 is connected to the anode of the diode D14, and the two ends of the resistor R85 are respectively connected to the gate and source of the field effect tube Q10; the cathode of the diode D14 is connected to the 1# pin of the solenoid valve terminal J4; the cathode of the diode D8 is connected to the 1# pin of the solenoid valve terminal J4, and the anode of the diode D8 is connected to 12VDC; the 2# pin of the solenoid valve terminal J4 is grounded through the control circuit; The control circuit includes: port 002, resistor R98, resistor R92, field effect tube Q14 and capacitor C71, port 002 is connected in series with resistor R98 and then grounded, the gate of field effect tube Q14 is connected to one end of resistor R92, and the other end of resistor R92 is connected to port 002; the source of field effect tube Q14 is grounded, and the drain of field effect tube Q14 is connected to pin 2# of electromagnetic valve terminal J4; the two ends of capacitor C71 are respectively connected to the source and drain of field effect tube Q14; Port 002 is connected to the logic level output pin of the microcontroller; When both port 001 and port 002 input high level, the solenoid valve obtains 24VDC voltage and starts to work; When the 001 port inputs a low level and the 002 port inputs a high level, the solenoid valve obtains a 12VDC voltage and keeps working; When low level is input to both port 001 and port 002, transistor Q15 is turned off, field effect transistor Q10 is turned off, and field effect transistor Q14 is turned off, and the working voltage of the solenoid valve is 0.
2. A circuit for reducing the heat generation of a solenoid valve working coil according to claim 1, characterized in that: It also includes an inductor L7, an inductor L10 and a capacitor C68, one end of the inductor L7 is connected to the common end of the cathode of the diode D8 and the cathode of the diode D14, the other end of the inductor L7 is connected to the 1# pin of the solenoid valve terminal J4, one end of the inductor L10 is connected to the drain of the field effect transistor Q14, the other end of the inductor L10 is connected to the 2# pin of the solenoid valve terminal J4, one end of the capacitor C68 is connected to the 1# pin of the solenoid valve terminal J4 and the common end of the inductor L7, and the other end of the capacitor C68 is connected to the 2# pin of the solenoid valve terminal J4 and the common end of the inductor L10.
3. A circuit for reducing the heat generation of a solenoid valve working coil according to claim 2, characterized in that: It also includes a diode D12, wherein the anode of the diode D12 is connected to the drain of the field effect transistor Q14, and the cathode of the diode D12 is connected to the cathode of the diode D8.