A three-way valve control circuit and a three-way valve

Abstract

The present invention relates to the technical field of three-way valve control, and discloses a three-way valve control circuit and a three-way valve, including: a separating element control circuit, which includes a power supply terminal, a control terminal, and two input / output terminals. The power supply terminal is connected to the positive and negative poles of the power supply, the control terminal is connected to a high and low level control signal, one of the input / output terminals is connected to one end of the motor, and the other input / output terminal is connected to the other end of the motor through a series arc segment control circuit; the arc segment control circuit includes a first arc segment, a second arc segment, a common arc segment, and a connecting rod. The output shaft of the motor rotates forward or backward to drive the connecting rod to make a reciprocating rotation based on the common arc segment, so that the common arc segment can be connected to the first arc segment and the second arc segment at the same time through the connecting rod, or the common arc segment is only connected to the first arc segment, or the common arc segment is only connected to the second arc segment. The three-way valve of the present invention can accurately control the operation to the target position through the arc segments.

Description

Technical Field

[0001] The present invention relates to the technical field of three-way valve control, and particularly relates to a three-way valve control circuit and a three-way valve. Background Art

[0002] A three-way valve refers to a valve body with three ports, one inlet and two outlets, and three-way valves are also used in the field of automobile manufacturing. Traditional automotive three-way valves use LIN and PWM communication control, which require dedicated chips or software support and are costly; at the same time, traditional automotive three-way valves must have 5 ports (motor positive, motor negative, signal power supply, feedback signal, signal ground) or 4 ports (power supply positive, power supply negative, feedback signal, control signal) or special function ports for control (PWM, LIN, etc.), and at least two ports are connected to the controller, which wastes the port resources of the controller. Therefore, there is an urgent need to design a three-way valve that only requires 1 ordinary I / O port of the controller to achieve control, does not require additional dedicated chips, and does not require special function ports (PWM, LIN), which not only saves costs but also saves the port resources of the controller. Summary of the Invention

[0003] The present invention provides a three-way valve control circuit and a three-way valve to solve the above problems.

[0004] The present invention is realized through the following technical solutions:

[0005] A three-way valve control circuit includes:

[0006] A discrete component control circuit for controlling the direction of the current flowing into the motor according to the level of the high and low level control signal output, thereby controlling the rotation direction of the rotor of the motor, including a power supply terminal, a control terminal, and two input / output terminals. The power supply terminal is connected to the positive and negative power supplies, the control terminal is connected to the high and low level control signal, one of the input / output terminals is connected to one end of the motor, and the other input / output terminal is connected to the other end of the motor through a series arc segment control circuit. When one of the input / output terminals is used as an output, the other input / output terminal is used as an input;

[0007] The arc segment control circuit includes a first arc segment, a second arc segment, a common arc segment, and a connecting rod. The first arc segment, the second arc segment, and the common arc segment do not intersect. One end of the common arc segment is connected to one of the input / output terminals of the discrete component control circuit. The forward or reverse rotation of the output shaft of the motor drives the connecting rod to make a reciprocating rotation based on the common arc segment, so that the common arc segment can be connected to the first arc segment and the second arc segment at the same time through the connecting rod, or the common arc segment is only connected to the first arc segment, or the common arc segment is only connected to the second arc segment, thereby controlling the on and off of the forward or reverse current of the motor.

[0008] As an optimization, the common arc segment includes a first sub-arc segment, a second sub-arc segment, and a third sub-arc segment. The first sub-arc segment is only connected to the first arc segment through the connecting rod. The second sub-arc segment can be commonly connected to the first arc segment and the second arc segment through the connecting rod. The third sub-arc segment is only connected to the second arc segment through the connecting rod. One end of the first arc segment is connected to the anode of the first diode D1. One end of the second arc segment is connected to the cathode of the second diode D2. The cathode of the first diode D1 and the anode of the second diode D2 are commonly connected to one end of the stator winding of the motor. The other end of the first arc segment and the other end of the second arc segment are left open.

[0009] As an optimization, the separation element control circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first triode Q1, a second triode Q2, a third triode Q, a fourth triode Q4, a fifth triode Q5, a third diode D3, a fourth diode D4, a fifth diode D5, a first capacitor C1, a second capacitor C2, and a third capacitor C3. Among them,

[0010] The high and low level control signal X1 is input to the anode of the fifth diode D5. The cathode of the fifth diode D5 is commonly connected to one end of the sixth resistor R6 and the eighth resistor R8. The other end of the eighth resistor R8 is connected to the negative power supply terminal. The other end of the sixth resistor R6 is connected to the gate of the fourth triode Q4. The emitter of the fourth triode Q4 is connected to the negative power supply terminal. The collector of the fourth triode Q4 is commonly connected to the cathode of the fourth diode D4, the gate of the first triode Q1, the first resistor R1, and one end of the first capacitor C1. The anode of the fourth diode D4, the emitter of the first triode Q1, and one end of the third capacitor C3 are connected to one end of the motor. The other end of the first resistor R1 and one end of the fourth resistor R4 are connected to the positive power supply terminal. The other end of the fourth resistor R4 and the other end of the first capacitor C1 are connected to the collector of the first triode Q1;

[0011] The common connection end of the cathode of the first diode D1 and the anode of the second diode D2, and the other end of the third capacitor C3 are connected to the other end of the motor. The positive pole of the power supply is also connected to one end of the fifth resistor R5, the second resistor R2, and the third resistor R3. The two ends of the second capacitor C2 are respectively connected to the other end of the fifth resistor R5 and the other end of the second resistor R2. The other end of the fifth resistor R5 is also connected to the collector of the second triode Q2. The emitter of the second triode Q2 and the anode of the third diode D3 are both connected to the common arc segment. The other end of the second resistor R2, the gate of the second triode Q2, and the cathode of the third diode D3 are all connected to the collector of the third triode Q3. The emitter of the third triode Q3 is connected to the negative pole of the power supply. The gate of the third triode Q3 and the other end of the third resistor R3 are both connected to the collector of the fifth triode Q5. The emitter of the fifth triode Q5 is connected to the negative pole of the power supply. The gate of the fifth triode Q5 is connected to the cathode of the fifth diode D5 through the series connection of the seventh resistor R7.

[0012] The present invention also discloses a three-way valve, comprising:

[0013] A valve body, the valve body includes a water inlet, a first water outlet, and a second water outlet. The water inlet, the first water outlet, and the second water outlet are communicated through a cavity provided in the valve body. The first water outlet and the second water outlet are respectively located on different sides of the valve body, and in the vertical direction, the position of the water inlet is higher than that of the first water outlet and the second water outlet;

[0014] An actuator, including a housing installed above the valve body. A motor and a printed circuit board printed with the aforementioned three-way valve control circuit are provided in the housing. The two ends of the stator winding of the motor are respectively connected to the three-way valve control circuit on the printed circuit board. The motor is a double-output shaft motor. One output shaft of the motor is fixedly connected with a connecting rod, and the axis of the connecting rod is perpendicular to the axis of the output shaft;

[0015] Another output shaft of the motor sequentially passes through the housing and the valve body and extends into the cavity, and is fixedly connected with a rotating piece through a connecting component. A fixed piece is partitioned in the cavity. The rotating piece is movably arranged on the upper surface of the fixed piece, and the rotating piece and the fixed piece are coaxially arranged. The axes of the water inlet, the first water outlet and the second water outlet are all parallel to the surface of the rotating piece or the fixed piece. The fixed piece and the rotating piece are both located below the water inlet, and the fixed piece is located above the first water outlet and the second water outlet. A first through hole and a second through hole are arranged through the surface of the fixed piece. The first through hole is communicated with the first water outlet, and the second through hole is communicated with the second water outlet. Rotating the rotating piece enables only the first through hole or the second through hole to be communicated with the water inlet at the same time.

[0016] As an optimization, the fixed piece is in a disc shape, and both the first through hole and the second through hole are sectors with the same size and shape.

[0017] As an optimization, the rotating piece is in a disc shape, and the rotating piece is provided with a notch in the shape of a sector with the same size and shape as the first through hole and the second through hole.

[0018] As an optimization, a groove is arranged on the upper surface of the rotating piece, and the bottom of the connecting component is clamped in the groove.

[0019] As an optimization, the connecting component includes a first connecting portion fixedly connected with the output shaft of the motor and a second connecting portion fixedly connected with the bottom of the first connecting portion. The bottom of the second connecting portion is clamped with the groove. An annular convex portion is arranged on the circumferential side wall of the first connecting portion, and a compression spring is fixedly connected between the annular convex portion pressing ring and the rotating piece.

[0020] As an optimization, the angular range of the sectors presented by the first through hole, the second through hole and the notch is 90° - 120°.

[0021] As an optimization, when the motor drives the connecting rod to reach the first sub-arc segment, the notch of the rotating piece is arranged opposite to one of the through holes on the fixed piece; when the motor drives the connecting rod to reach the third sub-arc segment, the notch of the rotating piece is arranged opposite to the other through hole on the fixed piece, and when the notch of the rotating piece makes a reciprocating motion between the first through hole and the second through hole, the connecting rod makes a reciprocating motion along the second sub-arc segment between the first sub-arc segment and the third sub-arc segment, and the motion angle of the notch is the same as the motion angle of the connecting rod.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0023] The three-way valve control circuit of the present invention can control the three-way valve by sending high and low levels through 1 ordinary I / O port.

[0024] The three-way valve of the present invention can accurately control the operation to the target position through the arc section, without involving a computer program, thus avoiding the situation of control chaos caused by computer program errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts. In the drawings:

[0026] Figure 1 is a schematic structural diagram of a control circuit of a three-way valve according to the present invention;

[0027] Figure 2 is Figure 1 the specific circuit diagram;

[0028] Figure 3 is a schematic diagram of a printed circuit board of a control circuit of a three-way valve printed with Figure 1 (front view of the printed circuit board);

[0029] Figure 4 is a schematic structural diagram of the three-way valve and the actuator according to the present invention;

[0030] Figure 5 is a schematic structural diagram of a connecting component, a fixing piece, a rotating piece, a compression spring and a pressing ring;

[0031] Figure 6 is Figure 5 a structural schematic from another angle;

[0032] Figure 7 is a schematic structural diagram of a fixing piece and a rotating piece, wherein, (a) is a schematic structural diagram of the fixing piece, and (b) is a schematic structural diagram of the rotating piece;

[0033] Figure 8 is a schematic structural diagram of the working mode of the fixing piece and the rotating piece, wherein, (a) is the case where the rotating piece rotates to the notch facing the first through hole, and (b) is the case where the rotating piece rotates to the notch facing the second through hole.

[0034] Labels in the drawings and corresponding component names:

[0035] 1 - Separation element control circuit, 2 - Arc segment control circuit, 2a - Connecting rod, 3 - Actuator, 4 - Valve body, 4a - Water inlet, 4b - First water outlet, 4c - Second water outlet, 5 - Fixed piece, 5b - First through hole, 5c - Second through hole, 6 - Rotating piece, 6a - Groove, 7 - Second connecting portion, 8 - Compression spring, 9 - First connecting portion. Detailed implementation mode

[0036] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with embodiments and drawings. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0037] A three - way valve control circuit of Embodiment 1, as Figure 1-2 shown, includes:

[0038] The separation element control circuit 1 is used to control the direction of the current flowing into the motor M according to the level of the high - low level control signal output, so as to control the rotation direction of the rotor of the motor M, that is, to control the forward and reverse rotation of the motor. It includes a power supply terminal, a control terminal and two input - output terminals. The power supply terminal is connected to the positive and negative poles of the power supply, the control terminal is connected to the high - low level control signal, one of the input - output terminals is connected to one end of the stator winding of the motor, and the other input - output terminal is connected to the other end of the stator winding of the motor through a series - connected arc segment control circuit. And when one of the input - output terminals is used as an output, the other input - output terminal is used as an input;

[0039] Here, the input - output terminal means that this terminal can be used as both an input terminal and an output terminal.

[0040] As Figure 1 shown, the arc segment control circuit 2 includes a first arc segment h1, a second arc segment h2, a common arc segment and a connecting rod 2a. The first arc segment, the second arc segment and the common arc segment do not intersect. One end of the common arc segment is connected to one of the input - output terminals of the separation element control circuit. The output shaft of the motor rotates forward or backward to drive the connecting rod 2a to make a reciprocating rotation based on the common arc segment, so that the common arc segment can be connected to both the first arc segment and the second arc segment through the connecting rod 2a, or the common arc segment is only connected to the first arc segment, or the common arc segment is only connected to the second arc segment, so as to control the on - off of the forward or reverse current of the motor.

[0041] Specifically, the common arc segment includes a first sub - arc segment z1, a second sub - arc segment z2 and a third sub - arc segment z3. The first sub - arc segment z1 is only connected to the first arc segment h1 through the connecting rod 2a, that is Figure 1In the middle arc segment control circuit, for the part to the right of the right dashed line, the second sub-arc segment z2 can be commonly connected to the first arc segment h1 and the second arc segment h2 through the connecting rod 2a, that is, the part between the two dashed lines. The third sub-arc segment z3 is only connected to the second arc segment h2 through the connecting rod 2a, that is, the part to the left of the left dashed line. One end of the first arc segment h1 is connected to the anode of the first diode D1, and one end of the second arc segment is connected to the cathode of the second diode D2. The cathodes of the first diode D1 and the anode of the second diode D2 are commonly connected to one end of the stator winding of the motor. The other ends of the first arc segment and the second arc segment are left unconnected.

[0042] The separation element control circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first triode Q1, a second triode Q2, a third triode Q, a fourth triode Q4, a fifth triode Q5, a third diode D3, a fourth diode D4, a fifth diode D5, a first capacitor C1, a second capacitor C2, and a third capacitor C3. Among them,

[0043] The high and low level control signal X1 is input to the anode of the fifth diode D5. The cathode of the fifth diode D5 is commonly connected to one end of the sixth resistor R6 and the eighth resistor R8. The other end of the eighth resistor R8 is connected to the negative electrode of the power supply. The other end of the sixth resistor R6 is connected to the gate of the fourth triode Q4. The emitter of the fourth triode Q4 is connected to the negative electrode of the power supply. The collector of the fourth triode Q4 is commonly connected to the cathode of the fourth diode D4, the gate of the first triode Q1, one end of the first resistor R1, and one end of the first capacitor C1. The anode of the fourth diode D4, the emitter of the first triode Q1, and one end of the third capacitor C3 are connected to one end of the stator winding of the motor. The other end of the first resistor R1 and one end of the fourth resistor R4 are connected to the positive electrode of the power supply. The other end of the fourth resistor R4 and the other end of the first capacitor C1 are connected to the collector of the first triode Q1;

[0044] The common connection terminal of the cathode of the first diode D1 and the anode of the second diode D2, and the other end of the third capacitor C3 are connected to the other end of the stator winding of the motor. The positive pole of the power supply is also connected to one end of the fifth resistor R5, the second resistor R2, and the third resistor R3. The two ends of the second capacitor C2 are respectively connected to the other end of the fifth resistor R5 and the other end of the second resistor R2. The other end of the fifth resistor R5 is also connected to the collector of the second triode Q2. The emitter of the second triode Q2 and the anode of the third diode D3 are both connected to the common arc segment. The other end of the second resistor R2, the gate of the second triode Q2, and the cathode of the third diode D3 are all connected to the collector of the third triode Q3. The emitter of the third triode Q3 is connected to the negative pole of the power supply. The gate of the third triode Q3 and the other end of the third resistor R3 are both connected to the collector of the fifth triode Q5. The emitter of the fifth triode Q5 is connected to the negative pole of the power supply. The gate of the fifth triode Q5 is connected to the cathode of the fifth diode D5 through the series connection of the seventh resistor R7.

[0045] As Figure 2 shown, there are only three ports for the overall three-way valve control circuit of the present invention to be externally connected. One is the high and low level control signal port, which is connected to the controller. One is the positive pole of the power supply, and one is the negative pole of the power supply. These two ports are respectively connected to the positive and negative poles of the power supply.

[0046] As Figure 3 shown, it is the printed circuit board diagram of this control circuit, that is, the three-way valve control circuit in this embodiment is arranged on the Figure 3 shown printed circuit board. The common arc segment is in the shape of a middle circular ring. The output shaft of the motor is located at the center of the circular ring. The connecting rod is fixed perpendicular to the output shaft. The connecting rod is a metal rod and is in contact with the printed circuit board. In this way, no matter which position the connecting rod is in, the connecting rod will definitely be connected to the common arc segment. When the motor drives the connecting rod to be in the solid line position, the second arc segment and the common arc segment are connected through the connecting rod. When the motor drives the connecting rod to be in the dotted line position, the first arc segment and the common arc segment are connected through the connecting rod. The second sub-arc segment Z2 is located between the solid line connecting rod and the dotted line connecting rod. The first sub-arc segment Z1 is located at the part corresponding to the end of the first arc segment on the left of the dotted line. The second sub-arc segment Z3 is located at the part corresponding to the end of the second arc segment on the left of the solid line.

[0047] As Figure 2 shown, when a high level is input to the control port X1, Q2, Q4, and Q5 are turned on, and Q1 and Q3 are turned off. At this time, the current flows from the positive pole of the power supply through R5, Q2, D1, D4, and Q4 into the negative pole of the power supply, that is, GND. As Figure 2As shown by the dashed arrow in the figure, the current flows through the common arc segment, the connecting rod, the first arc segment h1, and the first diode D1 in sequence and then flows into the motor (since there is a second diode at the second arc segment, which prevents the current from flowing from the cathode to the anode of the second diode, so the current can only flow into the motor through the first diode), that is, it flows through the motor from right to left. Suppose the motor rotates and drives the connecting rod to rotate towards the end of the first arc segment h1 that is not connected to the motor (i.e., the direction of the solid line) ( Figure 2 can be regarded as moving to the left), until the connecting rod is no longer connected to the first arc segment, the D1 circuit is disconnected, and in Figure 3 it is disconnected from the arc segment corresponding to h1, and at this time the motor stops running;

[0048] Similarly, when a low level is input to the control port X1, Q1 and Q3 are turned on, and Q2, Q4, and Q5 are turned off. At this time, the current flows from the positive pole of the power supply through R4, Q1, D2, D3, and Q3 in sequence and then flows into the negative pole of the power supply. As Figure 2 shown by the solid arrow in the figure, after the current flows through the motor, the current flowing out of the motor flows through the second diode D2, the second arc segment, the connecting rod, and the common arc segment in sequence and then flows into the separation element control circuit. Since there is a first diode at the first arc segment, which prevents the current from flowing from the cathode to the anode of the first diode, so the current flowing out of the motor can only flow into the arc segment control circuit through the second diode, and the current flows through the motor from left to right. Suppose the motor rotates and drives the connecting rod to rotate towards the end of the second arc segment h2 that is not connected to the motor (i.e., the direction of the dashed line) ( Figure 2 is regarded as moving to the right in the figure), until the connecting rod is no longer connected to the second arc segment, the h2 circuit is disconnected, and at this time the motor stops running.

[0049] Of course, the rotation of the motor can also be the two opposite situations above. For example, when a high level is input to the control port X1, the motor rotates and drives the connecting rod to rotate towards the end of the second arc segment h2 that is not connected to the motor (i.e., the direction of the dashed line) ( Figure 2 is regarded as moving to the right in the figure), until the connecting rod is no longer connected to the second arc segment, the h2 circuit is disconnected, and at this time the motor stops running; and when a low level is input to the control port X1, the motor rotates and drives the connecting rod to rotate towards the end of the second arc segment h2 that is not connected to the motor (i.e., the direction of the dashed line) ( Figure 2 is regarded as moving to the right in the figure), until the connecting rod is no longer connected to the second arc segment, the h2 circuit is disconnected, and at this time the motor stops running. This depends on which terminal of the two terminals of the stator winding of the separation element control circuit, the arc segment control circuit and the motor is specifically connected, and specific situations should be analyzed specifically.

[0050] A three-way valve of Embodiment 2, as Figure 4 shown, includes:

[0051] Valve body 4, the valve body 4 includes a water inlet 4a, a first water outlet 4b and a second water outlet 4c. The water inlet 4a, the first water outlet 4b and the second water outlet 4c are communicated through a cavity provided in the valve body 4. The first water outlet 4b and the second water outlet 4c are respectively located on different sides of the valve body 4, and in the vertical direction, the position of the water inlet 4a is higher than that of the first water outlet 4b and the second water outlet 4c.

[0052] In this embodiment, the valve body 4 is in a cube shape. The water inlet 4a, the first water outlet 4b and the second water outlet 4c are respectively located on three sides of the cube, and the planes where the axes of the water inlet 4a, the first water outlet 4b and the second water outlet 4c are located are parallel to each other.

[0053] Actuator 3, including a housing installed above the valve body 4. Inside the housing, a motor (not marked in the figure) controlled to rotate forward and backward by the three-way valve control circuit described in Embodiment 1 and a printed circuit board provided with the three-way valve control circuit are fixedly arranged. The two ends of the stator winding of the motor are respectively connected to the three-way valve control circuit on the printed circuit board, that is, one end of the stator winding of the motor is connected to one of the input / output terminals of the separation element control circuit of the three-way valve control circuit, and the other end of the stator winding of the motor is connected to the arc segment control circuit. The connection method refers to Figure 1-2 , which will not be elaborated here.

[0054] A sealing treatment is performed between the actuator 3 and the valve body 4 by existing means, so as to ensure that the water in the valve body 4 will not enter the actuator 3. The specific sealing means are existing means, such as installing a sealing ring, using a sealed bearing, etc., which will not be elaborated here.

[0055] The motor is located on the side of the printed circuit board where the three-way valve control circuit is not printed. The motor is a double-output shaft motor. One output shaft of the motor passes through the printed circuit board and is fixedly connected to a connecting rod, and the connecting rod is perpendicular to the output shaft. A space for accommodating the rotation of the connecting rod is provided inside the housing, that is, the motor is arranged on the back of the printed circuit board. In this embodiment, the motor is below the printed circuit board, the front side of the printed circuit board faces upward, and a space for accommodating the rotation of the connecting rod is provided between the printed circuit board and the housing.

[0056] Of course, the motor can also be located on the side of the printed circuit board where the three-way valve control circuit is printed. In this case, the front side of the printed circuit board should face the motor, that is, the front side of the printed circuit board faces downward, the motor is still below the printed circuit board, and the output shaft of the motor can pass through the printed circuit board or not, as long as it is ensured that the connecting rod can be connected to the arc segment control circuit on the printed circuit board. The best case is still to pass through the printed circuit board.

[0057] Another output shaft of the motor sequentially penetrates downward through the housing and the valve body and extends into the cavity, and is fixedly connected with a rotating piece 6 through a connecting component 7. A fixed piece 5 is partitioned and arranged in the cavity. The rotating piece 6 and the fixed piece 5 are coaxially arranged. The other output shaft of the motor is perpendicular to the surface of the fixed piece 5. The output shaft of the motor is located on the central axis of the rotating piece and the fixed piece. The rotating piece 6 is movably abutted against the upper surface of the fixed piece 5. The axes of the water inlet 4a, the first water outlet 4b and the second water outlet 4c are parallel to the surface of the rotating piece 6 or the fixed piece 5. The fixed piece 5 and the rotating piece 6 are both located below the water inlet 4a, and the fixed piece 5 is located above the first water outlet 4b and the second water outlet 4c. A first through hole 5b and a second through hole 5c are arranged through the surface of the fixed piece 5. The first through hole 5b is communicated with the first water outlet 4b, and the second through hole 5c is communicated with the second water outlet 4c. Rotating the rotating piece 6 enables only one of the first through hole 5b or the second through hole 5c of the fixed piece 5 to be communicated with the water inlet at the same time.

[0058] Specifically, as Figures 5-8 shown, the fixed piece 5 is in a disc shape. The first through hole 5b and the second through hole 5c are both sectors with the same size and shape. The rotating piece 6 is in a disc shape, and a notch in the shape of a sector with the same size and shape as the first through hole 5b and the second through hole 5c is arranged on the rotating piece 6.

[0059] In this way, when the notch of the rotating piece 6 is aligned with the first through hole 5b, the second through hole 5c is blocked by the rotating piece, so that the water inlet 4a can only be communicated with the first water outlet 4b through the first through hole 5b. Similarly, when the notch of the rotating piece 6 is aligned with the second through hole 5c, the first through hole 5b is blocked by the rotating piece 6, so that the water inlet 4a can only be communicated with the second water outlet 4c through the second through hole 5c.

[0060] In the automotive thermal management system, there must be a water outlet for discharging the corresponding liquid. Therefore, for the three-way valve in this embodiment, the two water outlets cannot be closed simultaneously. Thus, the notch of the rotating piece can reciprocate between the positions of the first through hole and the second through hole.

[0061] A groove 6a is arranged on the upper surface of the rotating piece 6. The connecting component includes a first connecting portion 9 fixedly connected with the output shaft of the motor and a second connecting portion 7 fixedly connected with the bottom of the first connecting portion 9. The bottom of the second connecting portion 7 is clamped with the groove 6a. As Figure 6 shown, two grooves 6a are arranged. The two grooves are symmetric with respect to the axis of the output shaft. Correspondingly, two structures for clamping with the grooves are arranged at the bottom of the second connecting portion 7, so that the rotation of the output shaft of the motor can drive the rotation of the rotating piece.

[0062] The circumferential side wall of the first connecting portion is provided with an annular protrusion 9, the annular protrusion 9 is fixedly connected to the inner ring of the sealed bearing, the outer ring of the sealed bearing is fixedly connected to the valve body, and a compression spring 8 is fixedly connected between the annular protrusion 9 and the rotating piece 6. Through the compression spring 8, the rotating piece 6 can be more tightly abutted against the upper surface of the fixed piece 5.

[0063] The angular range of the sector presented by the first through hole 5b, the second through hole 5c and the notch is 90° to 120°. In this embodiment, as Figures 7-8 shown, the angles of both through holes are 120°, so that the water flowing from the water inlet to the water outlet through the through holes can be as large as possible. When the motor drives the connecting rod 2a to reach the first sub-arc segment z1, the notch of the rotating piece 6 is disposed opposite to one of the through holes on the fixed piece 5; when the motor drives the connecting rod 2a to reach the third sub-arc segment z3, the notch of the rotating piece 6 is disposed opposite to the other through hole on the fixed piece 5, and when the notch of the rotating piece 6 reciprocates between the first through hole 5b and the second through hole 5c, the connecting rod 2a reciprocates along the second sub-arc segment z2 between the first sub-arc segment z1 and the third sub-arc segment z3, and the movement angle of the notch is the same as the movement angle of the connecting rod 2a.

[0064] For example, when a high level is input to the control port X1, the actuator operates to drive the valve core to rotate, and the notch of the rotating piece runs to be opposite to the first through hole, and the first water outlet presents a through state, as Figure 8 shown in (a) of

[0065] When a low level is input to the control port X1, the actuator operates to drive the valve core to rotate, and the notch of the rotating piece runs to be opposite to the second through hole, and the second water outlet presents a through state, as Figure 8 shown in (b) of

[0066] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A three-way valve control circuit, characterized in that Comprising: A separation element control circuit, configured to control the direction of the current flowing into the motor according to the level of a high or low level control signal, so as to control the rotation direction of the rotor of the motor. The separation element control circuit includes a power supply terminal, a control terminal, and two input / output terminals. The power supply terminal is connected to the positive and negative poles of the power supply. The control terminal is connected to the high or low level control signal. One of the input / output terminals is connected to one end of the motor, and the other input / output terminal is connected to the other end of the motor through a series arc segment control circuit. And when one of the input / output terminals is used as an output, the other input / output terminal is used as an input; The arc segment control circuit includes a first arc segment, a second arc segment, a common arc segment, and a connecting rod. The first arc segment, the second arc segment, and the common arc segment do not intersect. One end of the common arc segment is connected to one of the input / output terminals of the separation element control circuit. The output shaft of the motor rotates forward or backward to drive the connecting rod to reciprocate based on the common arc segment, so that the common arc segment can be connected to the first arc segment and the second arc segment simultaneously through the connecting rod, or the common arc segment is only connected to the first arc segment, or the common arc segment is only connected to the second arc segment, thereby controlling the on / off of the forward or reverse current of the motor; The common arc segment includes a first sub-arc segment, a second sub-arc segment, and a third sub-arc segment. The first sub-arc segment is only connected to the first arc segment through the connecting rod. The second sub-arc segment can be commonly connected to the first arc segment and the second arc segment through the connecting rod. The third sub-arc segment is only connected to the second arc segment through the connecting rod. One end of the first arc segment is connected to the anode of a first diode D1. One end of the second arc segment is connected to the cathode of a second diode D2. The cathodes of the first diode D1 and the second diode D2 are commonly connected to one end of the stator winding of the motor. The other ends of the first arc segment and the second arc segment are left open; The three-way valve control circuit has only three ports connected to the outside. One is a high or low level control signal port, which connects the controller to the control terminal. One is a positive power supply port, and one is a negative power supply port. One end of the positive power supply port and the negative power supply port are respectively connected to the positive and negative poles of the power supply. The other ends of the positive power supply port and the negative power supply port are connected to the power supply terminal.

2. The three-way valve control circuit according to claim 1, wherein, The separation element control circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first triode Q1, a second triode Q2, a third triode Q3, a fourth triode Q4, a fifth triode Q5, a third diode D3, a fourth diode D4, a fifth diode D5, a first capacitor C1, a second capacitor C2, and a third capacitor C3. Among them, The high and low level control signal X1 is input to the anode of the fifth diode D5. The cathodes of the fifth diode D5 are commonly connected to one end of the sixth resistor R6 and the eighth resistor R8. The other end of the eighth resistor R8 is connected to the negative power supply terminal. The other end of the sixth resistor R6 is connected to the gate of the fourth triode Q4. The emitter of the fourth triode Q4 is connected to the negative power supply terminal. The collector of the fourth triode Q4 is commonly connected to one end of the cathode of the fourth diode D4, the gate of the first triode Q1, the first resistor R1, and the first capacitor C1. The anode of the fourth diode D4, one end of the emitter of the first triode Q1, and one end of the third capacitor C3 are connected to one end of the motor. The other end of the first resistor R1, one end of the fourth resistor R4 are connected to the positive power supply terminal. The other end of the fourth resistor R4 and the other end of the first capacitor C1 are connected to the collector of the first triode Q1; The common connection end of the cathode of the first diode D1 and the anode of the second diode D2 and the other end of the third capacitor C3 are connected to the other end of the motor. The positive power supply terminal is also connected to one end of the fifth resistor R5, the second resistor R2, and the third resistor R3. The two ends of the second capacitor C2 are respectively connected to the other end of the fifth resistor R5 and the other end of the second resistor R2. The other end of the fifth resistor R5 is also connected to the collector of the second triode Q2. The emitter of the second triode Q2 and the anode of the third diode D3 are both connected to the common arc section. The other end of the second resistor R2, the gate of the second triode Q2, and the cathode of the third diode D3 are all connected to the collector of the third triode Q3. The emitter of the third triode Q3 is connected to the negative power supply terminal. The gate of the third triode Q3 and the other end of the third resistor R3 are both connected to the collector of the fifth triode Q5. The emitter of the fifth triode Q5 is connected to the negative power supply terminal. The gate of the fifth triode Q5 is connected to the cathode of the fifth diode D5 through the series connection of the seventh resistor R7.

3. A three-way valve, characterized in that, Including: A valve body, the valve body includes a water inlet, a first water outlet, and a second water outlet. The water inlet, the first water outlet, and the second water outlet are communicated through a cavity provided in the valve body. The first water outlet and the second water outlet are respectively located on different sides of the valve body, and in the vertical direction, the position of the water inlet is higher than the first water outlet and the second water outlet; An actuator, including a housing installed above the valve body. A motor and a printed circuit board printed with the three-way valve control circuit according to any one of claims 1-2 are provided in the housing. The two ends of the stator winding of the motor are respectively connected to the three-way valve control circuit on the printed circuit board. The motor is a dual-output shaft motor. One output shaft of the motor is fixedly connected with a connecting rod, and the axis of the connecting rod is perpendicular to the axis of the output shaft; Another output shaft of the motor sequentially passes through the housing and the valve body and extends into the cavity, and is fixedly connected with a rotating piece through a connecting component. A fixing piece is partitioned in the cavity. The rotating piece is movably arranged on the upper surface of the fixing piece, and the rotating piece and the fixing piece are coaxially arranged. The axes of the water inlet, the first water outlet and the second water outlet are all parallel to the surface of the rotating piece or the fixing piece. The fixing piece and the rotating piece are both located below the water inlet, and the fixing piece is located above the first water outlet and the second water outlet. A first through hole and a second through hole are arranged through the surface of the fixing piece. The first through hole is communicated with the first water outlet, and the second through hole is communicated with the second water outlet. Rotate the rotating piece so that only the first through hole or the second through hole is communicated with the water inlet at the same time.

4. The three-way valve according to claim 3, characterized in that, The fixing piece is in a disc shape, and both the first through hole and the second through hole are sectors with the same size and shape.

5. A three-way valve according to claim 4, characterized in that, The rotating piece is in a disc shape, and the rotating piece is provided with notches in the shape of sectors with the same size and shape as the first through hole and the second through hole.

6. The three-way valve according to claim 5, characterized in that, A groove is arranged on the upper surface of the rotating piece, and the bottom of the connecting component is clamped in the groove.

7. The three-way valve according to claim 6, wherein The connecting component includes a first connecting portion fixedly connected with the output shaft of the motor and a second connecting portion fixedly connected with the bottom of the first connecting portion. The bottom of the second connecting portion is clamped with the groove. An annular convex portion is arranged on the circumferential side wall of the first connecting portion, and a compression spring is fixedly connected between the annular convex portion and the rotating piece.

8. A three-way valve according to claim 4 or 5, characterized in that, The angular range of the sectors presented by the first through hole, the second through hole and the notch is 90°-120°.

9. A three-way valve according to claim 8, characterized in that, When the motor drives the connecting rod to reach the first sub-arc segment, the notch of the rotating piece is oppositely arranged with one of the through holes on the fixing piece; when the motor drives the connecting rod to reach the third sub-arc segment, the notch of the rotating piece is oppositely arranged with the other through hole on the fixing piece. And when the notch of the rotating piece makes a reciprocating motion between the first through hole and the second through hole, the connecting rod makes a reciprocating motion along the second sub-arc segment between the first sub-arc segment and the third sub-arc segment, and the movement angle of the notch is the same as the movement angle of the connecting rod.

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