CN218825227U - Oil pump controller circuit - Google Patents
Oil pump controller circuit Download PDFInfo
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- CN218825227U CN218825227U CN202223102844.6U CN202223102844U CN218825227U CN 218825227 U CN218825227 U CN 218825227U CN 202223102844 U CN202223102844 U CN 202223102844U CN 218825227 U CN218825227 U CN 218825227U
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Abstract
The utility model provides an oil pump controller circuit, which comprises a single chip microcomputer, PWM pressure regulating drive protection circuit includes step-down circuit and is used for detecting that the input voltage is higher than the procedure setting value, the partial pressure detection circuit who carries out the outage protection automatically, step-down circuit includes the step-down switch stabiliser, the TVS pipe, the transformer, first diode, second capacitor and first electrolytic capacitor, voltage input positive pole VIN1 is connected with 2 feet of transformer, 3 feet output +24V of transformer, still be connected with the positive pole of first diode on the +24V, 1 foot input of step-down switch stabiliser is connected to the negative pole of first diode, parallel connection has the TVS pipe between 1 foot output of step-down switch stabiliser and the ground, electric capacity and electrolytic capacitor, and the negative pole of TVS pipe is connected with 1 foot input of step-down switch stabiliser, 2 foot output series connection of step-down switch stabiliser has the first inductance of output 5V voltage; this structure improves the security.
Description
Technical Field
The utility model relates to a technical field of oil pump control, in particular to oil pump controller circuit.
Background
The oil pump controller automatically controls the motor, and automatically performs switching between working and stopping within set time. The conventional oil pump controller is generally in five voltage power supply modes of AC220V, AC110V, DC V, DC V, DC V, the most common mode is DC24V, and the DC24V oil pump controller basically adopts a switching power supply or a vehicle-mounted power supply for power supply, but the conventional switching power supply is unstable in circuit structure and is easy to have the problem that the output voltage is possibly too large at the moment of power supply to cause damage to the oil pump controller, so that how to solve the problem that the damage to the controller is caused by the fact that the output voltage is possibly too large at the moment of power supply is very important.
Disclosure of Invention
Technical problem to be solved
The utility model aims at providing an oil pump controller circuit for solve current oil pump control and exist easily when the circular telegram in the twinkling of an eye, very probably output voltage is too big, and leads to the defect of the damage of controller.
(II) contents of utility model
In order to solve the technical problem, the utility model provides a following technical scheme: the utility model provides an oil pump controller circuit, includes singlechip U2, its characterized in that: the PWM voltage-regulating drive protection circuit comprises a voltage-reducing circuit and a voltage-dividing detection circuit, wherein the voltage-reducing circuit is used for reducing an input power supply to +5V first power supply voltage, the voltage-dividing detection circuit can be used for automatically carrying out power-off protection when the input voltage is higher than a program set value, the voltage-reducing circuit comprises a voltage-reducing switch voltage stabilizer U1, a TVS tube D2, a transformer L2, a first diode D1, a second capacitor C2 and a first electrolytic capacitor E1, a voltage-input positive electrode VIN1 is connected with a pin 2 of the transformer L2, a pin 3 of the transformer L2 outputs +24V second power supply voltage, the +24V second power supply voltage is also connected with an anode of the first diode D1, a cathode of the first diode D1 is connected with a pin 1 input end of the voltage-reducing switch voltage stabilizer U1, the voltage reduction switch voltage stabilizer U1's 1 foot output and earthing terminal GND between parallelly connected TVS pipe D2, second electric capacity C2 and first electrolytic capacitor E1, and TVS pipe D2's negative pole and voltage reduction switch voltage stabilizer U1's 1 foot input are connected, voltage reduction switch voltage stabilizer U1's 2 foot output is established ties and is had first inductance L1, the other end of first inductance L1 is as the first power supply voltage of +5V for singlechip U2 power supply, partial pressure detection circuitry include first resistance R1, second resistance R2, twelfth polar tube D10, first resistance R1, second resistance R2 establish ties between voltage reduction switch voltage stabilizer U1's 1 foot and earthing terminal GND, and twelfth polar tube D10 and second resistance R2 connect in parallel, earthing terminal GND is connected to the negative pole of twelfth polar tube D10, the AD port that the common terminal of first resistance R1, second resistance R2 is connected to the singlechip.
Preferably, in order to ensure stable output, a fourth diode D4 is connected in series between the 2-pin output end of the buck switching regulator U1 and the ground end GND, a cathode of the fourth diode D4 is connected to the 2-pin output end of the buck switching regulator U1, and a first capacitor C1 and a second electrolytic capacitor E2 which are connected in parallel with each other are connected between the +5V first power supply voltage and the ground end GND.
Preferably, for the convenience of input safety, pin 2 of the transformer L2 is connected to the voltage input positive electrode VIN through a fuse F1, and pin 1 of the transformer L2 is connected to the voltage output terminal AGND.
Preferably, the following units are electrically connected to the single chip microcomputer U2:
a communication unit for communicating with the outside;
an LED display unit for displaying the status of the device;
a buzzer alarm unit for alarming when the oil pump is in fault;
the temperature monitoring unit is used for detecting the internal working temperature of the oil pump;
a pressure detection unit for detecting the internal pressure condition of the oil pump;
the liquid level detection unit is used for detecting the liquid level condition in the oil pump;
the oil pump motor driving unit is used for driving the oil pump motor to normally work;
and the voice playing unit is used for carrying out voice playing information.
Preferably, in order to avoid the problem that the single chip microcomputer is damaged due to the fact that a forward voltage is input when a pressure signal line, a liquid level signal line and a power line are connected in a wrong mode, the service life of the product is further prolonged, a one-way diode for preventing the single chip microcomputer U2 from being damaged due to the fact that a forward voltage is input from the outside is electrically connected to the pressure detection unit, the liquid level detection unit and the single chip microcomputer U2, and the negative end of the one-way diode is connected with the I/0 port of the single chip microcomputer U2.
(III) advantageous effects
The utility model provides a pair of oil pump controller circuit, its advantage is in:
1. a TVS tube D2 is used at the input end of the circuit, and when the input voltage instantly exceeds 36V, protection is carried out; a voltage division detection circuit is formed by the first resistor R1, the second resistor R2 and the twelfth polar tube D10 and is connected to an AD port of the singlechip U2, and when the voltage is higher than a program set value, power-off protection is automatically carried out; if the front-end TVS tube D2 fails, the twelfth polar tube D10 can stabilize the port voltage to be 5V at the maximum, so that the singlechip U2 is prevented from being broken down due to overhigh partial voltage; therefore, the problem that the output voltage is possibly overlarge at the moment of electrifying to cause damage to the controller is solved;
2. a second inductor L2 is added at the voltage input end to isolate alternating current noise which possibly appears in the power supply, so that the back end voltage is more stable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic circuit diagram showing the connection of a chip microcomputer, a temperature monitoring unit, and a program burn-in port in embodiment 1;
fig. 2 is a schematic circuit connection diagram of a PWM voltage regulation driving protection circuit in embodiment 1;
FIG. 3 is a schematic circuit diagram of a communication unit according to embodiment 1;
FIG. 4 is a schematic diagram of a circuit connection structure of the LED display unit in embodiment 1;
fig. 5 is a schematic view of a circuit connection structure of a buzzer alarm unit in embodiment 1;
fig. 6 is a schematic diagram of a circuit connection structure of the pressure detection unit in embodiment 1;
FIG. 7 is a schematic view showing a circuit connection structure of the liquid level detecting unit in embodiment 1;
fig. 8 is a schematic view of a circuit connection structure of the motor drive unit of the oil pump in embodiment 1;
fig. 9 is a schematic circuit connection structure diagram of the voice playing unit in embodiment 1.
The reference numerals in the figures illustrate:
the device comprises a PWM voltage regulation driving protection circuit 1, a first power supply voltage 2, a partial pressure detection circuit 1-2, a voltage reduction circuit 1-1, a second power supply voltage 3, a communication unit 4, an LED display unit 5, a buzzer alarm unit 6, a temperature monitoring unit 7, a pressure detection unit 8, a liquid level detection unit 9, an oil pump motor driving unit 10, a voice playing unit 11 and a program burning-in port 12.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
Referring to fig. 1 to 9, the oil pump controller circuit provided in this embodiment includes a single chip U2, and is characterized in that: the voltage-reducing circuit 1-1 comprises a voltage-reducing circuit 1-1 for reducing an input power supply to a first supply voltage 2 of +5V and a voltage-dividing detection circuit 1-2 for automatically carrying out power-off protection when the input voltage is higher than a program set value, the voltage-reducing circuit 1-1 comprises a voltage-reducing switch voltage stabilizer U1, a TVS tube D2, a transformer L2, a first diode D1, a second capacitor C2 and a first electrolytic capacitor E1, a voltage-input anode VIN1 is connected with a pin 2 of the transformer L2, a pin 3 of the transformer L2 outputs a second supply voltage 3 of +24V, the second supply voltage 3 of +24V is also connected with an anode of the first diode D1, a cathode of the first diode D1 is connected with a pin 1 input end of the voltage-reducing switch voltage stabilizer U1, the voltage reduction switching regulator comprises a voltage reduction switching regulator U1, a TVS tube D2, a second capacitor C2 and a first electrolytic capacitor E1, wherein a 1 pin output end of the TVS tube D2 is connected with a 1 pin input end of the voltage reduction switching regulator U1 in parallel, a 2 pin output end of the voltage reduction switching regulator U1 is connected with a first inductor L1 in series, the other end of the first inductor L1 is used as a +5V first power supply voltage 2 for supplying power to a single chip microcomputer U2, a voltage division detection circuit 1-2 comprises a first resistor R1, a second resistor R2 and a twelfth polar tube D10, the first resistor R1 and the second resistor R2 are connected between a 1 pin of the voltage reduction switching regulator U1 and the grounding end GND in series, the twelfth polar tube D10 is connected with the second resistor R2 in parallel, the negative electrode of the twelfth polar tube D10 is connected with the grounding end of the grounding end, and the common ends of the first resistor R1 and the second resistor R2 are connected with the AD port of the single chip microcomputer U2.
Preferably, in order to ensure stable output, a fourth diode D4 is connected in series between the 2-pin output end of the buck switching regulator U1 and the ground GND, a cathode of the fourth diode D4 is connected to the 2-pin output end of the buck switching regulator U1, and a first capacitor C1 and a second electrolytic capacitor E2 which are connected in parallel are connected between the +5V first power supply voltage 2 and the ground GND.
Preferably, for the convenience of input safety, pin 2 of the transformer L2 is connected to the voltage input positive electrode VIN through a fuse F1, and pin 1 of the transformer L2 is connected to the voltage output terminal AGND.
Preferably, the following units are electrically connected to the single chip microcomputer U2:
a communication unit 4 for performing communication with the outside;
an LED display unit 5 for displaying the status of the device;
a buzzer alarm unit 6 for making an audible alarm when the oil pump is out of order;
a temperature monitoring unit 7 for detecting the internal working temperature of the oil pump;
a pressure detection unit 8 for detecting the internal pressure condition of the oil pump;
a liquid level detection unit 9 for detecting the liquid level condition inside the oil pump;
an oil pump motor driving unit 10 for driving the oil pump motor to normally operate;
a voice playing unit 11 for playing voice playing information.
In the embodiment, communication is realized by arranging the communication unit 4, meanwhile, the LED display unit 5 is arranged for displaying current state information, and buzzer alarm is realized by arranging the buzzer alarm unit 6; the pressure detection unit 8 is used for detecting the pressure condition inside the oil pump, and the liquid level detection unit 9 is arranged to monitor the liquid level inside the oil pump in real time.
Preferably, in order to avoid the problem that the single chip microcomputer is damaged due to the fact that a forward voltage is input when a pressure signal line, a liquid level signal line and a power line are connected in a wrong mode, the service life of the product is further prolonged, the pressure detection unit 8, the liquid level detection unit 9 and the single chip microcomputer U2 are electrically connected with a one-way diode 12 which prevents the external forward voltage from being input due to reasons and causing the single chip microcomputer U2 to be damaged, and the negative end of the one-way diode 12 is connected with an I/0 port of the single chip microcomputer U2.
As in fig. 1-9, VIN1 represents the positive voltage input; GND1 represents a power supply negative electrode; m-represents the output cathode of the motor; m + represents the output positive pole of the motor; YL1 represents a pressure port, YW1 represents a liquid level port; f1 represents a fuse; l1 represents a first inductance; l2 represents a transformer; l3 represents a third inductance; d1 represents a first diode; d2 represents a TVS tube; d3 represents a third diode; d4 denotes a fourth diode; d5 a fifth diode; d6 a sixth diode; d7CAN electrostatic protection; d8 an eighth diode; d9 ninth diode; d10 represents a voltage-stabilizing tube; d11 denotes an eleventh diode; c1 represents a first capacitance; c2 represents a second capacitance; c3 represents a third capacitance; c4 represents a fourth capacitance; c5 represents a fifth capacitance; c6 represents a sixth capacitance; c7 represents a seventh capacitance; c8 represents an eighth capacitance; c9 represents a ninth capacitance; c10 represents a tenth capacitance; c11 represents an eleventh capacitance; c12 represents a twelfth capacitance; c13 represents a thirteenth capacitance; c14 represents a fourteenth capacitance; c15 denotes a fifteenth capacitance; c16 denotes a sixteenth capacitance; c17 denotes a seventeenth capacitance; c18 represents an eighteenth capacitance; c19 represents a nineteenth capacitance; c20 represents a twentieth capacitance; r1 represents a first resistance; r2 represents a second resistance; r3 represents a third resistance; r4 represents a fourth resistance; r5 represents a fifth resistance; r8 represents an eighth resistance; r9 represents a ninth resistance; r10 represents a tenth resistance; r11 represents an eleventh resistance; r12 represents a twelfth resistance; r13 represents a thirteenth resistance; r14 represents a fourteenth resistance; r15 represents a fifteenth resistance; r16 represents a sixteenth resistance; r19 represents a nineteenth resistance; r20 represents a twentieth resistance; r21 represents a twenty-first resistance; r22 represents a twenty-second resistance; r23 represents a twenty-third resistance; r24 represents a twenty-fourth resistance; r25 represents a twenty-fifth resistance; r26 represents a twenty-sixth resistance; r27 represents a twenty-seventh resistance; r28 represents a twenty-eighth resistance; r29 represents a twenty-ninth resistance; r30 represents a thirtieth resistance; r31 represents a thirty-first resistance; r32 represents a thirty-second resistance; r33 represents a thirty-third resistance; r34 represents a thirty-fourth resistance; q1 represents a first triode; q2 represents a second triode; q3 represents a third transistor; k1 represents a relay; e1 represents a first electrolytic capacitor; e2 represents a second electrolytic capacitor; u1 represents a step-down switching regulator; u2 represents a singlechip; u3 denotes an operational amplifier; u4 denotes a first photocoupler; u5 represents a CAN communication chip; u6 denotes a second photocoupler; u7 denotes a voice chip; DEBUG1 represents a burning port; UART1 represents a serial port communication port; p2 denotes a display panel connection port; CAN1 represents a CAN bus communication port; SP1 denotes a speaker; BZ1 represents a buzzer; j1 denotes the test point GND, and the working principle of the whole device is as follows: firstly, an external power supply inputs voltage from a voltage input anode VIN1, and the voltage passes through a fuse F1 and reaches two pins of a transformer L2; the three pins of the transformer L2 are connected with the anode of a first diode D1; the cathode of the first diode D1 is connected with the cathode of the TVS tube D2; the positive electrode of the TVS tube D2 is connected with four pins of the transformer L2; one pin of the transformer L2 is connected with a power supply cathode GND1; when the external voltage exceeds 36V, the TVS tube D2 plays a role in protection, and the front end voltage is limited to 36V;
the cathode of the first diode D1 is connected to one end of the first resistor R1; the other end of the first resistor R1 is connected to one end of the second resistor R2, the cathode of the voltage regulator tube D10 and an AD port of the single chip microcomputer U2; the other end of the second resistor R2 and the anode of the voltage regulator tube D10 are connected with GND; the voltage is output by the first diode, the voltage is read by the singlechip U2 after the voltage is reduced through a voltage division circuit consisting of the first resistor R1 and the second resistor R2, and the voltage regulator tube D10 plays a role in ensuring that the voltage input to the singlechip U2 is less than or equal to 5V and preventing the singlechip U2 from being damaged by overvoltage;
the pressure port YL1 is connected with the cathode of a sixth diode D6, and the anode of the sixth diode D6 is connected with a first photoelectric coupler U4 and a twenty-first resistor R21; the liquid level port YW1 is connected with the negative electrode of a ninth diode D9, and the positive electrode of the ninth diode D9 is connected with a second photoelectric coupler U6 and a thirtieth resistor R30; the other end of the twenty-first resistor R21 is connected with the other input end of the first photoelectric coupler U4 and one end of the nineteenth resistor R19; the other end of the thirtieth resistor R30 is connected with the other input end of the second photoelectric coupler U6 and one end of the twenty-fifth resistor R25; the other ends of the nineteenth resistor R19 and the twenty-fifth resistor R25 are connected with 5V; one ends of a twentieth resistor R20 and a twenty-sixth resistor R26 are connected with 5V, and the other ends of the twentieth resistor R20 and the twenty-sixth resistor R26 are respectively connected with the output pins of the first photoelectric coupler U4 and the second photoelectric coupler U6 and the I/O port of the singlechip U2; the other output pins of the first photoelectric coupler U4 and the second photoelectric coupler U6 are connected with GND; by utilizing the unidirectional conduction characteristic of the diode, the circuit can be conducted only when the pressure port YL1 and the liquid level port YW1 are at low level; when pressure port YL1, liquid level port YW1 were the high level, the voltage can't play protection circuit's effect through sixth diode D6, ninth diode D9, and when only photoelectric coupler input connection diode's a foot was the low level, the IO mouth that singlechip U2 corresponds just can be drawn low, plays duplicate protection to singlechip U2 moreover.
This structure thus achieves the following advantages:
1. a TVS tube D2 is used at the input end of the circuit, and when the input voltage exceeds 36V instantly, protection is carried out; a voltage division detection circuit is formed by the first resistor R1, the second resistor R2 and the twelfth polar tube D10 and is connected to an AD port of the singlechip U2, and when the voltage is higher than a program set value, power-off protection is automatically carried out; if the front-end TVS tube D2 fails, the twelfth polar tube D10 can stabilize the port voltage to be 5V at the maximum, so that the singlechip U2 is prevented from being broken down due to overhigh partial voltage; therefore, the problem that the output voltage is possibly overlarge at the moment of electrifying to cause damage to the controller is solved;
2. a second inductor L2 is added at the voltage input end to isolate alternating current clutter possibly occurring in a power supply, so that the voltage of the rear end is more stable;
3. sixth diode D6, ninth diode D9 are established ties respectively at pressure port YL1, liquid level port YW1, prevent that the outside from because of various reasons, inputing a forward voltage, leading to singlechip U2 to damage.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. The utility model provides an oil pump controller circuit, includes singlechip (U2), its characterized in that: the power supply circuit also comprises a PWM voltage-regulating driving protection circuit (1) for supplying power to the singlechip (U2), the PWM voltage-regulating driving protection circuit (1) comprises a voltage-reducing circuit (1-1) for reducing an input power supply into a first power supply voltage (2) of +5V and a voltage-dividing detection circuit (1-2) capable of automatically performing power-off protection when the input voltage is higher than a program set value, the voltage-reducing circuit (1-1) comprises a voltage-reducing switch voltage stabilizer (U1), a TVS tube (D2), a transformer (L2), a first diode (D1), a second capacitor (C2) and a first electrolytic capacitor (E1), a voltage input anode (VIN 1) is connected with a pin 2 of the transformer (L2), a second power supply voltage (3) of +24V is output by a pin 3 of the transformer (L2), the second power supply voltage (3) of +24V is also connected with an anode of the first diode (D1) on the second power supply voltage (3), a cathode of the first diode (D1) is connected with a pin 1 of the switch voltage-regulating switch voltage stabilizer (U1), a first inductor (D1) and a first capacitor (D2) connected with a grounding end (D2) in series connection, and a first capacitor (D1) connected with a first voltage-reducing switch voltage stabilizer input end (S1) and a first capacitor (S1) connected with a first switch voltage stabilizer (S1) and a first switch voltage-reducing switch input end (2) in series connection end, a first switch voltage stabilizer (S1) and a second switch pin (S2) connected with a first switch voltage-reducing switch pin (S1) connected with a first switch input end, a first switch pin (S1) connected with a first switch voltage stabilizer (S1) and a second switch voltage stabilizer (S2) connected in series connection end, a second switch pin (S2) connected with a first switch pin (S1) connected in series connection end, a first switch pin (2) connected with a grounding end, the other end of the first inductor (L1) is used as a first power supply voltage (2) of +5V for supplying power to the single chip microcomputer (U2), the voltage division detection circuit (1-2) comprises a first resistor (R1), a second resistor (R2) and a twelfth polar tube (D10), the first resistor (R1) and the second resistor (R2) are connected between a pin 1 of the voltage switch voltage stabilizer (U1) and a grounding terminal (GND) in series, the twelfth polar tube (D10) is connected with the second resistor (R2) in parallel, the negative electrode of the twelfth polar tube (D10) is connected with the grounding terminal (GND), and the common end of the first resistor (R1) and the second resistor (R2) is connected with an AD port of the single chip microcomputer (U2).
2. The oil pump controller circuit according to claim 1, characterized in that: fourth diode (D4) is connected in series between 2 foot output terminals of step-down switching regulator (U1) and ground terminal (GND), the negative pole of fourth diode (D4) is connected with 2 foot output terminals of step-down switching regulator (U1), be connected with first electric capacity (C1) and second electrolytic capacitor (E2) that connect in parallel each other between + 5V's first power supply voltage (2) and ground terminal (GND).
3. The oil pump controller circuit according to claim 2, characterized in that: and a pin 2 of the transformer (L2) is connected with a voltage input anode (VIN) through a fuse (F1), and a pin 1 of the transformer (L2) is connected with a voltage output end (AGND).
4. An oil pump controller circuit according to claim 3, characterized in that: the singlechip (U2) is also electrically connected with the following units: a communication unit (4) for communicating with the outside; an LED display unit (5) for displaying the status of the device; a buzzer alarm unit (6) for making an audible alarm when the oil pump is in failure; a temperature monitoring unit (7) for detecting the internal working temperature of the oil pump; a pressure detection unit (8) for detecting the internal pressure condition of the oil pump; the liquid level detection unit (9) is used for detecting the liquid level condition in the oil pump; an oil pump motor driving unit (10) for driving the oil pump motor to normally operate; and a voice playing unit (11) for playing the voice playing information.
5. The oil pump controller circuit according to claim 4, wherein: the pressure detection unit (8), the liquid level detection unit (9) and the single chip microcomputer (U2) are electrically connected with a one-way diode (12) which prevents the external from inputting a forward voltage due to reasons to cause the damage of the single chip microcomputer (U2), and the negative end of the one-way diode (12) is connected with an I/0 port of the single chip microcomputer (U2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223102844.6U CN218825227U (en) | 2022-11-22 | 2022-11-22 | Oil pump controller circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223102844.6U CN218825227U (en) | 2022-11-22 | 2022-11-22 | Oil pump controller circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218825227U true CN218825227U (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223102844.6U Active CN218825227U (en) | 2022-11-22 | 2022-11-22 | Oil pump controller circuit |
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| Country | Link |
|---|---|
| CN (1) | CN218825227U (en) |
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- 2022-11-22 CN CN202223102844.6U patent/CN218825227U/en active Active
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