Electronic valve

Abstract

The embodiment of the utility model provides an electronic valve. The electronic valve comprises a valve body, a control circuit, at least one power supply node, a power circuit, a battery pack and a power switching circuit. The power switching circuit includes: a first line connecting a positive electrode of a battery pack and a power supply node; a second line connecting the positive electrode of the battery pack and the power supply node; the voltage drop generated by the first line is smaller than that generated by the second line; the first controllable switch is arranged on the first line; and the second controllable switch is arranged on the second line. The control circuit is respectively connected with the first controllable switch and the second controllable switch, so that the first circuit and the second circuit are alternatively conducted, and the control circuit is suitable for the situation whether an external power supply is connected into the power supply circuit or not.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, and particularly to an electronic valve. Background Art

[0002] An electronic water valve is a device that uses electronic control technology to achieve water flow control. It is widely used in various water supply systems in households, industries, agriculture, and public facilities.

[0003] It can be configured with main components such as a control circuit, a valve body, and a driver. The control circuit changes the position of the valve core in the valve body through the driver, thereby controlling the opening and closing of the water flow and the flow rate, and realizing the automatic adjustment of the valve.

[0004] The normal operation of the existing electronic water valve depends on the stable power supply of an external power source. Once the power of the external power source is interrupted, it will cause the driver to fail to operate and affect the reliable operation of the water supply system.

[0005] Therefore, there is an urgent need to provide appropriate methods to improve the working stability of the electronic water valve and ensure that it still has the ability to adjust the water flow and water volume in the event of a power interruption. Summary of the Utility Model

[0006] The electronic valve provided by the utility model aims to solve the defect that the existing electronic valve is easily affected by external power supply, and once the power supply is interrupted, it is easy to lose the adjustment ability and affect the normal operation of the water supply system.

[0007] The utility model provides an electronic valve. The electronic valve includes: a valve body; at least one power supply node for controlling the valve body, the power supply node being connected to the valve body and the control circuit to supply power to the valve; a power supply circuit connected to at least one of the power supply nodes for converting an input voltage into a preset target voltage and providing it to the power supply node; a battery pack, the positive electrode of the battery pack being connected to at least one of the power supply nodes for providing the target voltage to the power supply node; a power supply switching circuit including: a first line connecting the positive electrode of the battery pack and the power supply node; a second line connecting the positive electrode of the battery pack and the power supply node; the voltage drop generated by the first line being less than the voltage drop generated by the second line; a first controllable switch provided on the first line for controlling the conduction and interruption of the first line; a second controllable switch provided on the second line for controlling the conduction and interruption of the second line; wherein the control circuit is respectively connected to the first controllable switch and the second controllable switch to selectively conduct the first line and the second line.

[0008] Optionally, it further includes: a charging circuit; the charging circuit is respectively connected to the positive electrode of the battery pack and at least one power supply node, and is configured to convert the electric energy provided by the power supply node into a preset charging voltage to charge the battery pack.

[0009] Optionally, the charging circuit further includes a third controllable switch; wherein, the third controllable switch is connected to the control circuit and is disposed on the electric energy transfer line of the charging circuit, and the control circuit is configured to: when the battery pack reaches a preset battery voltage, control the third controllable switch to be turned off so that the electric energy transfer line is interrupted.

[0010] Optionally, the charging circuit specifically includes: a charging chip, a current regulating resistor, an inductor, and a freewheeling diode; wherein, the charging chip includes: an input voltage pin, a charging current setting pin, a signal reference ground pin, a battery connection terminal pin, and an internal switch control pin; a first connection end of the third control switch is connected to the power supply node, a second connection end of the third control switch is connected to the input power pin, the charging current setting pin is grounded through a current regulating resistor having a preset resistance value; the battery connection terminal pin is connected to the positive electrode of the battery pack; one end of the inductor is connected to the power supply node, and the other end of the inductor is connected to the positive electrode of the battery pack through the freewheeling diode; a common connection node of the inductor and the freewheeling diode is also connected to the internal switch pin of the charging chip.

[0011] Optionally, the first line includes: a first diode; wherein, the positive electrode of the first diode is connected to the power supply node, the negative electrode of the first diode is connected to the first connection end of the first controllable switch, and the positive electrode of the first diode is connected to the power supply node.

[0012] Optionally, the second line includes: a second diode and a third diode; wherein, the first diode, the second diode, and the third diode are connected in series in sequence, and the negative electrode of the third diode is connected to the first connection end of the second controllable switch; a common connection node between the first diode and the second diode is connected to the first connection end of the first controllable switch.

[0013] Optionally, the first controllable switch includes: a first triode, a first MOS transistor, a first resistor, a second resistor, and a third resistor; wherein, the base of the first triode is connected to the control circuit through the first resistor, the emitter of the first triode is connected to the reference ground, the collector of the first triode is connected to the gate of the first MOS transistor through the second resistor; a third resistor is connected between the gate and the source of the first MOS transistor; the drain of the first MOS transistor is connected to the negative electrode of the first diode; the source of the first MOS transistor is connected to the positive electrode of the battery pack.

[0014] Optionally, the second controllable switch includes: a second triode, a second MOS transistor, a fourth resistor, a fifth resistor, and a sixth resistor; wherein, the base of the second triode is connected to the control circuit through the fourth resistor, the emitter of the second triode is connected to the reference ground, and the collector of the second triode is connected to the gate of the second MOS transistor through the fifth resistor; the sixth resistor is connected between the gate and the source of the second MOS transistor; the drain of the second MOS transistor is connected to the negative electrode of the third diode; the source of the second MOS transistor is connected to the positive electrode of the battery pack.

[0015] One beneficial effect of the embodiment of the present invention is that: an additional battery pack for temporary power supply and a corresponding power supply switching circuit are configured in the electronic water valve. This power supply switching circuit can promptly and quickly switch to the battery pack power supply when the external power supply is interrupted, ensuring the reliable operation of the electronic water valve and providing a certain power-off buffer time. Description of the Drawings

[0016] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings represent the same elements, unless otherwise stated, the drawings in the figures do not constitute a proportional limitation.

[0017] Figure 1 It is a schematic diagram of the electronic valve provided by the embodiment of the present invention;

[0018] Figure 2 It is a circuit schematic diagram of the charging circuit provided by the embodiment of the present invention;

[0019] Figure 3 It is a circuit schematic diagram of the power supply switching circuit provided by the embodiment of the present invention. Detailed Embodiments

[0020] The present invention will be described in detail below with reference to specific embodiments. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope of the present invention and its applications.

[0021] It should be noted that unless otherwise clearly specified and defined, the orientation or positional relationship indicated by terms such as "thickness direction" and "plug-in connection" used in this specification is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. Terms such as "installation", "mating", "connection", and "fixing" should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; "fixing" can be bolt fixing, snap fixing, or glue fixing; the terms "first", "second", "third", "fourth", "fifth", and "sixth" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features; thus, features defined with "first", "second", "third", "fourth", "fifth", and "sixth" can explicitly or implicitly include one or more of such features; the meaning of "multiple" or "several" is two or more; in addition, "and / or" includes any and all combinations of one or more of the related listed items; for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in detail below with reference to the drawings and specific embodiments.

[0023] Figure 1 It is a functional block diagram of the electronic valve provided by an embodiment of the present application. As Figure 1 shown, the electronic valve includes: a valve body 10, a control circuit 20, a power supply node 30, a power supply circuit 40, a battery pack 50, and a power supply switching circuit 60.

[0024] Among them, the valve body 10 is the main structure of the entire electronic valve. It can include one or more components such as a driver, a valve core, and a valve body to achieve the functions of the valve. Specifically, any suitable type of valve body can be selected according to the actual needs, and no specific limitation is made here.

[0025] The control circuit 20 is the control core of the entire electronic valve. It can execute logical operation instructions to achieve the orderly control of the valve body 10. Specifically, the control circuit 20 can also be selected in any suitable implementation form according to the actual needs. For example, a microcontroller or a single-chip microcomputer.

[0026] The power supply node 30 refers to the node that provides the required power supply voltage for the electronic devices in the electronic valve. In this embodiment, multiple power supply nodes 30 can be provided, and each power supply node 3Q provides a different voltage to meet the requirements of different types of electronic devices. For example, the power supply node can be a 12V power supply node for powering the driver, a 5V power supply node, and a 3.3V power supply node for powering the control circuit.

[0027] The power supply circuit 40 is an electronic circuit that realizes the conversion of electrical energy. It is connected to one or more of the above-mentioned power supply nodes, and can convert the input voltage from an external power supply into a preset target voltage and provide it to the corresponding power supply node.

[0028] The battery pack 50 is a device for storing electrical energy. It can be hermetically fixed in a specific area of the electronic water valve to provide electrical energy when needed. Specifically, the battery pack 50 can select and use any suitable type of electrical energy storage device according to actual needs, such as a battery pack composed of multiple battery cells in parallel or series. In this embodiment, the positive electrode of the battery pack is connected to at least one power supply node and can provide the target voltage for the power supply node.

[0029] The power supply switching circuit 60 is an electronic circuit for realizing the switching between battery pack power supply and power supply circuit power supply. It provides a first line Line1 connecting the positive electrode of the battery pack and the power supply node and a second line Line2 connecting the positive electrode of the battery pack and the power supply node, so that the power supply node 30 can be powered by both the battery pack 50 and the power supply circuit 40 through the conversion of the external power supply.

[0030] In this embodiment, the voltage drop generated by the first line is set to be significantly less than the voltage drop generated by the second line, and independent controllable switches SW1 and SW2 are provided on the first line and the second line respectively for controlling the conduction and interruption of the first line and the second line, so that the control circuit can make one of the first line and the second line conduct by controlling the switching states of the first controllable switch SW1 and the second controllable switch SW2.

[0031] During actual use, the control circuit is respectively connected to the first controllable switch and the second controllable switch. When an external power supply is connected to the power supply circuit, the control circuit controls the first controllable switch to be disconnected and the second controllable switch to be conducted. At this time, the battery pack 50 is connected to the power supply node through the second line.

[0032] Since the voltage drop of the second line is significantly higher at this time. Therefore, the voltage that the battery pack can provide to the power supply node will be lower than the voltage that the power supply circuit can provide. Thus, the battery pack will not supply power to the power supply node, and the electrical energy of the power supply node comes from the external power supply at this time.

[0033] When the external power supply of the power supply circuit is interrupted, the control circuit can control the first controllable switch to conduct and control the second controllable switch to disconnect. At this time, the battery pack 50 is connected to the power supply node through the first line, replacing the external power supply to provide an ideal target voltage for the power supply node.

[0034] When the power supply circuit has an external power supply for power supply, the power supply switching circuit provided by the embodiment of the present invention can ensure smooth and fast power supply switching by using the second line to connect the positive pole of the battery pack and the power supply node. Even if a certain amount of time is consumed during the switch switching process, once the voltage of the power supply node drops (the external power supply is interrupted) to be lower than the voltage drop of the positive pole of the battery pack, the positive pole of the battery pack can still provide a certain amount of electric energy and will not be completely powered off during the switching process.

[0035] In some embodiments, please continue to refer to Figure 1 , when the battery pack is a reusable rechargeable battery (for example, a lithium-ion battery), the electronic valve may further include: a charging circuit 70.

[0036] Among them, the charging circuit 70 is also a controllable electric energy conversion module. It is respectively connected to the positive pole of the battery pack and at least one power supply node, and can convert the electric energy provided by the power supply node into appropriate voltage and current to charge the battery pack in a set mode when the power supply circuit is powered by an external power supply, so as to keep it in a fully charged state.

[0037] Preferably, the charging circuit 70 may further include a third controllable switch SW3. Among them, the third controllable switch SW3 is a switch for controlling the charging process. It is connected to the control circuit and is arranged on the electric energy transfer line of the charging circuit.

[0038] During actual use, when the control circuit determines that the battery pack has been charged to a preset battery voltage, it can control the third controllable switch SW3 to disconnect, interrupting the electric energy transfer line to stop the charging process and avoid the problem of overcharging of the battery pack.

[0039] Figure 2 is the circuit schematic diagram of the charging circuit provided by the embodiment of the present application. As Figure 2 shown, the charging circuit specifically includes: a charging chip U, a current regulating resistor R, an inductor L, and a freewheeling diode D.

[0040] Among them, the charging chip U includes: an input voltage pin vin, a charging current setting pin prog, a signal reference ground pin sgnd, a battery connection terminal pin bat, an internal switch control pin SW, and a voltage bus pin vbus.

[0041] Among them, the first connection end of the third control switch SW3 is connected to a certain power supply node. This power supply node can be a power supply node that provides a target voltage of +5V. The second connection end of the third control switch is connected to the input power supply pin vin.

[0042] The charging current setting pin prog is grounded through a current regulating resistor R with a preset resistance value, and the battery connection end pin bat is connected to the positive electrode BAT of the battery pack; one end of the inductor L is connected to another power supply node VCC, and the other end of the inductor L is connected to the positive electrode of the battery pack through a freewheeling diode D. The common connection node of the inductor L and the freewheeling diode D is also connected to the internal switch pin SW of the charging chip.

[0043] During actual use, the control switch can control whether the charging chip operates by controlling the conduction / cut-off of the third control switch SW3. The internal switch pin SW of the charging chip provides corresponding conduction / cut-off state switching, and cooperates with the inductor L and the freewheeling diode D to achieve DC-to-DC voltage conversion and provide power to the positive electrode of the battery pack to charge the battery pack.

[0044] By adjusting the resistance value of the current regulating resistor R, the target current provided or output by the charging chip U can be controlled, thereby achieving steady-state regulation of the current output.

[0045] It should be noted that the above charging circuit can also add one or more electronic components according to actual needs to achieve corresponding functions and is not limited to what is described in the specification of the present utility model. For example, as Figure 2 shown, a plurality of resistors and capacitors are provided.

[0046] Figure 3 is the circuit schematic diagram of the power supply switching circuit provided by the embodiment of the present utility model. As Figure 3 shown, the first line in this power supply switching circuit includes: the first diode D1. The second line in this power supply switching circuit includes: the second diode D2 and the third diode D3.

[0047] Among them, the positive electrode of the first diode D1 is connected to a power supply node (for example, a power supply node that provides a voltage of +12V), the negative electrode of the first diode D1 is connected to the first connection end of the first controllable switch SW1, and the positive electrode of the first diode D1 is connected to the power supply node.

[0048] The first diode D1, the second diode D2, and the third diode D3 are connected in series in sequence, and the negative electrode of the third diode D3 is connected to the first connection end of the second controllable switch SW2; the common connection node between the first diode D1 and the second diode D2 is connected to the first connection end of the first controllable switch SW1.

[0049] Therefore, there is only one diode in the first circuit, while there are three diodes connected in series in the second circuit. Such a design makes the voltage drop in the second circuit significantly greater than that in the first circuit, so that the voltage provided by the positive electrode of the battery pack via the second circuit is significantly lower than the voltage provided by the power supply circuit to the power supply node under normal operating conditions.

[0050] Specifically, please continue to refer to Fig. 3. The first controllable switch includes: a first triode Q1, a first MOS transistor M1, a first resistor R1, a second resistor R2, and a third resistor R3.

[0051] Wherein, the base of the first triode Q1 is connected to the control circuit through the first resistor R1, the emitter of the first triode Q1 is connected to the reference ground GND, and the collector of the first triode Q1 is connected to the gate of the first MOS transistor through the second resistor R2; a third resistor R3 is connected between the gate and the source of the first MOS transistor; the drain of the first MOS transistor is connected to the negative electrode of the first diode D1; the source of the first MOS transistor is connected to the positive electrode BAT of the battery pack.

[0052] Please continue to refer to Figure 3 , similarly, the second controllable switch includes: a second triode Q2, a second MOS transistor M2, a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6.

[0053] Wherein, the base of the second triode Q2 is connected to the control circuit through the fourth resistor R4, the emitter of the second triode Q2 is connected to the reference ground GND, and the collector of the second triode Q2 is connected to the gate of the second MOS transistor through the fifth resistor R5; a sixth resistor R6 is connected between the gate and the source of the second MOS transistor; the drain of the second MOS transistor is connected to the negative electrode of the third diode D3; the source of the second MOS transistor is connected to the positive electrode BAT of the battery pack.

[0054] During actual use, when the external power supply is normally powered, the control circuit 20 can provide a low-level signal to the first MOS transistor M1 while providing a high-level signal to the second MOS transistor M2. At this time, the first MOS transistor M1 is turned off, and the first triode Q1 is also turned off; the second MOS transistor M2 is turned on, and the second triode Q2 is also turned on accordingly.

[0055] The positive electrode BAT of the battery pack is connected to the power supply node (for example, a power supply node providing +12V voltage) through three serially connected first diode D1, second diode D2, and third diode D3.

[0056] Since the three diodes will form a relatively large voltage drop, the voltage provided by the battery pack to the power supply node is significantly less than the output voltage provided by the power supply circuit. Therefore, at this time, the power supply node is powered by the target voltage output after the power supply circuit converts the external power supply, and the battery pack does not supply power externally.

[0057] When the external power supply is disconnected or stops supplying power, the control circuit will provide a low-level signal to the second MOS transistor M2 and a high-level signal to the first MOS transistor M1 at the same time. At this time, the second MOS transistor M2 is turned off, and the second triode Q2 is also turned off; the first MOS transistor M1 is turned on, and the first triode Q1 is also turned on accordingly.

[0058] The positive electrode BAT of the battery pack is connected to the power supply node only through the first diode D1 to provide a sufficient target voltage (for example, a DC voltage of +12V) to the power supply node.

[0059] In summary, the power supply switching circuit provided by the embodiment of the present invention can ensure that when the external power supply is normally supplying power, the battery pack does not supply power externally, and once the external power supply loses power, the voltage provided by the battery pack can immediately start working.

[0060] Further, after the external power supply loses power, the control circuit can reduce the loss by switching the power supply line so that the power supply of the battery pack only drops the voltage through one diode.

[0061] The above content is a further detailed description of the present invention in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. An electronic valve, comprising: The valve body and the control circuit for controlling the valve body are characterized by further comprising: at least one power supply node, the power supply node being connected to the valve body to supply power to the valve body; A power supply circuit, connected to at least one of the power supply nodes, configured to convert an input voltage into a preset target voltage and provide the voltage to the power supply node; a battery pack, wherein a positive electrode of the battery pack is connected to at least one of the power supply nodes and is used to provide the target voltage to the power supply node; A power switching circuit, the power switching circuit comprising: A first line connecting the positive electrode of the battery pack and the power supply node; A second line connecting the positive electrode of the battery pack and the power supply node; the voltage drop generated by the first line is smaller than the voltage drop generated by the second line; A first controllable switch, arranged on the first line, for controlling the conduction and interruption of the first line; A second controllable switch, arranged on the second line, for controlling the conduction and interruption of the second line; The control circuit is connected to the first controllable switch and the second controllable switch respectively, so as to selectively conduct the first circuit and the second circuit.

2. The electronic valve according to claim 1, characterized in that: Also includes: Charging circuit; The charging circuit is connected to the positive electrode of the battery pack and at least one power supply node respectively, and is used to convert the electric energy provided by the power supply node into a preset charging voltage to charge the battery pack.

3. The electronic valve according to claim 2, characterized in that: The charging circuit further includes a third controllable switch; The third controllable switch is connected to the control circuit and is arranged on the power transfer line of the charging circuit. The control circuit is used to control the third controllable switch to be disconnected when the battery pack reaches a preset battery voltage, so as to interrupt the power transfer line.

4. The electronic valve according to claim 3, characterized in that: The charging circuit specifically includes: a charging chip, a current regulating resistor, an inductor and a freewheeling diode; Wherein, the charging chip includes: an input voltage pin, a charging current setting pin, a signal reference ground pin, a battery connection terminal pin and an internal switch control pin; The first connection end of the third controllable switch is connected to the power supply node, the second connection end of the third controllable switch is connected to the input voltage pin, the charging current setting pin is grounded through a current regulating resistor with a preset resistance value; the battery connection terminal pin is connected to the positive electrode of the battery pack; One end of the inductor is connected to the power supply node, and the other end of the inductor is connected to the positive electrode of the battery pack through a freewheeling diode; the common connection node of the inductor and the freewheeling diode is also connected to the internal switch pin of the charging chip.

5. The electronic valve according to claim 1, characterized in that: The first circuit includes: a first diode; The anode of the first diode is connected to the power supply node, and the cathode of the first diode is connected to the first connection end of the first controllable switch.

6. The electronic valve according to claim 5, characterized in that: The second circuit includes: a second diode and a third diode; Among them, the first diode, the second diode and the third diode are connected in series in sequence, the cathode of the third diode is connected to the first connection end of the second controllable switch; the common connection node between the first diode and the second diode is connected to the first connection end of the first controllable switch.

7. The electronic valve according to claim 6, characterized in that: The first controllable switch includes: a first triode, a first MOS tube, a first resistor, a second resistor and a third resistor; The base of the first transistor is connected to the control circuit through the first resistor, the emitter of the first transistor is connected to the reference ground, and the collector of the first transistor is connected to the gate of the first MOS transistor through the second resistor; The third resistor is connected between the gate and source of the first MOS tube; the drain of the first MOS tube is connected to the cathode of the first diode; and the source of the first MOS tube is connected to the anode of the battery pack.

8. The electronic valve according to claim 6, characterized in that: The second controllable switch includes: a second triode, a second MOS tube, a fourth resistor, a fifth resistor and a sixth resistor; Wherein, the base of the second transistor is connected to the control circuit through the fourth resistor, the emitter of the second transistor is connected to the reference ground, and the collector of the second transistor is connected to the gate of the second MOS transistor through the fifth resistor; The sixth resistor is connected between the gate and source of the second MOS tube; the drain of the second MOS tube is connected to the cathode of the third diode; and the source of the second MOS tube is connected to the anode of the battery pack.

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