CN219833833U - Circuit for maintaining power supply and water valve device - Google Patents

Abstract

The utility model provides a circuit for maintaining power supply and a water valve device, which comprise a battery power supply unit, a direct-current boosting unit, an energy storage capacitor C27, a controller voltage stabilizing unit, a controller unit, a load switch unit and a load unit, wherein the battery power supply unit is connected with the direct-current boosting unit; the battery power supply unit provides a first voltage, the direct current boosting unit provides a boosted second voltage, and the controller voltage stabilizing unit provides a working voltage required by the controller unit, namely a third voltage. When the electric quantity of the battery power supply unit is sufficient, the second voltage charges the energy storage capacitor C27 through the second diode, and when the electric quantity of the battery power supply unit is insufficient, the energy storage capacitor is slowly discharged through a subsequent loop due to the cut-off of the second diode serving as a switching tube, and the discharge voltage is provided to maintain the operation of subsequent circuits and devices. The utility model has small capacitance value, small occupied volume and low cost; and a diode is used as a switching tube to control a charging and discharging loop, so that the cost is low.

Description

Circuit for maintaining power supply and water valve device

Technical Field

The utility model relates to the field of energy storage and discharge, in particular to a circuit for maintaining power supply and a water valve device.

Background

The electronic equipment is used in various industries, is not separated from the life of people, and has a processing control function, and a processor device is generally used, and can receive command signals sent by various external circuits when the electronic equipment is normally powered for use, analyze and process the received command signals or data and send out control signals. However, when the power supply is suddenly powered off, the processor is directly powered off and powered off, so that the processor cannot store data and send a corresponding abnormal work indication signal to the external equipment, and cannot continuously control the work of the load unit, and the load unit suddenly stops working, so that the load unit is possibly damaged. Thus, there is a need to provide enough backup power to the processor to continue operating for a period of time in the event of a power supply anomaly. For example, in the prior art, most of the power supply is used, a large capacitor is connected in parallel with the input front end of the processor, when the power supply is powered off, the processor is powered by discharging for a period of time by using the characteristic of high energy storage of the large capacitor, but the capacitor volume is increased along with the larger capacitor, and the cost is high; or the small capacitor is charged by the boosted high voltage, and a field effect switch tube is arranged to control the charge and discharge of the energy storage capacitor, so that the cost of the field effect switch tube as a switch tube is high.

In the prior art related to the present utility model, for example, chinese patent utility model patent, patent name: a power supply circuit and a vehicle, patent No. 202221436481.7 discloses a power supply circuit, wherein when a power supply is normal, a switch control circuit controls a controlled switch to be turned off, so that the power supply supplies power to a processing unit through a voltage reduction circuit, a first voltage provided by the power supply is boosted to a second voltage through a voltage boosting circuit to charge a capacitor, and when the power supply is abnormal, the switch control circuit controls the controlled switch to be turned on, so that the capacitor discharges and the power is supplied to the processing unit through the voltage reduction circuit. Therefore, the capacitor is charged through the booster circuit, and a higher and more stable charging voltage can be provided for the capacitor so as to improve the energy stored in the capacitor.

In the prior art, although the capacitor energy storage is improved and the discharging power supply time is prolonged, a field effect switch tube and a switch control circuit are used in the circuit, so that the cost is high.

Disclosure of Invention

Therefore, it is necessary to provide a circuit for maintaining power supply and a water valve device, which solve the problems of insufficient energy storage of the energy storage capacitor and high cost of the switch control circuit in the prior art.

In order to achieve the above object, the present utility model provides a circuit for maintaining power supply, including a battery power supply unit, a dc boost unit, an energy storage capacitor C27, a controller voltage stabilizing unit, a controller unit, a load switch unit and a load unit; the battery power supply unit provides a first voltage for the direct current boost unit, the first voltage is input into the positive electrode end of a first diode, the negative electrode end of the first diode is connected with the input end of the controller voltage stabilizing unit, the direct current boost unit boosts the first voltage and outputs a second voltage, the power output end of the direct current boost unit is connected to the power end of the load unit, the second voltage is used as a charging voltage and is input into the positive electrode end of a second diode and then is connected with one end of the energy storage capacitor C27, the energy storage capacitor C27 is charged, the other end of the energy storage capacitor C27 is grounded, the ungrounded end of the energy storage capacitor C27 and the negative electrode end of the second diode are connected with the input end of the controller voltage stabilizing unit, the controller voltage stabilizing unit outputs a third voltage to the controller unit, the load switch control end of the controller unit is connected with the control end of the load switch unit, and the output end of the load switch unit is connected with the load unit.

Further, the power supply system comprises a battery power supply unit, a direct current boosting unit, an energy storage capacitor C27, a controller voltage stabilizing unit, a controller unit, a load switch unit and a load unit; the battery power supply unit provides a first voltage for the direct current boost unit, the first voltage is input to the positive electrode end of the first diode, the negative electrode end of the first diode is connected with the input end of the controller voltage stabilizing unit, the direct current boost unit boosts the first voltage and outputs a second voltage, the power output end of the direct current boost unit is connected to the power end of the load unit, the second voltage is used as a charging voltage and is input to the positive electrode end of the second diode and then connected with one end of the energy storage capacitor C27, the energy storage capacitor C27 is charged, the other end of the energy storage capacitor C27 is grounded, the non-grounded end of the energy storage capacitor C27 is connected with the input end of the controller voltage stabilizing unit, the controller voltage stabilizing unit outputs a third voltage to the controller unit, the load switch control end of the controller unit is connected with the control end of the load switch unit, the output end of the load switch unit is connected with the load unit, and the controller unit is further connected with the switch of the load unit through controlling the load switch unit.

Further, the battery power supply unit is a dry battery.

Further, the direct-current boosting unit comprises a direct-current boosting chip U6, a third diode and a first inductor; the input power supply pin of direct current boost chip U6 with battery power supply unit's output is connected, the enabling pin of direct current boost chip U6 with the one end of first inductance with battery power supply unit connects, the switching node pin of direct current boost chip U6 is connected the other end of first inductance, and with the anodal end of third diode is connected, bleeder circuit is connected to the negative pole end of third diode, bleeder circuit's output is connected the output feedback pin of direct current boost chip U6, the ground connection pin of direct current boost chip U6 is earthed.

Further, the controller voltage stabilizing unit comprises a direct current voltage stabilizing chip U2; the power output end of the direct current voltage stabilizing chip U2 is connected with the power end of the controller unit, and the grounding end of the direct current voltage stabilizing chip U2 is grounded.

Further, the controller unit includes a processor chip U1; the load switch control pin of the processor chip U1 is connected with the load switch unit to control the on-off of the load unit switch.

Further, the controller unit further includes a voltage division detection circuit; the input end of the voltage division detection circuit is connected with the power output end of the direct current boosting unit, and the output end of the voltage division detection circuit is connected with the voltage detection input pin of the processor chip U1.

Further, the controller unit further comprises an LCD display circuit; and a plurality of input ends of the LCD display circuit are respectively connected with a plurality of output pins of the LCD display circuit of the processor chip U1.

Further, the controller unit further comprises a timing start circuit; the timing starting circuit is connected with a plurality of timing setting pins of the processor chip U1 through a plurality of key switches.

Further, the load switch unit comprises a direct current driving chip U3; the enabling pin and the output control pin of the processor chip U1 are respectively connected with the enabling end and the input end of the direct current driving chip U3, the output end of the direct current driving chip U3 is connected with the load unit, and the driving power end of the direct current driving chip U3 is connected with the power end of the direct current boosting unit.

The utility model provides a water valve device, which comprises a circuit for maintaining power supply and a valve; the circuit for maintaining power supply is any one of the embodiments of the present utility model, and the circuit for maintaining power supply includes a load unit, where the load unit is an electromagnetic driving mechanism, and the electromagnetic driving mechanism is disposed on the valve.

Compared with the prior art, the technical scheme is characterized in that the first voltage provided by the battery power supply unit is divided into two paths of output, and one path of output passes through the positive electrode end of the first diode and then is input into the input end of the controller voltage stabilizing unit (only acts when the direct current boosting unit does not work yet); and one path of the voltage is boosted by the direct-current voltage boosting unit to output the second voltage. The second voltage is input into a power end of the load unit and used as the working voltage of the load unit; after the second voltage is connected with the second diode, the energy storage capacitor C27 is charged; the non-grounding end of the energy storage capacitor C27 is connected with the input end of the controller voltage stabilizing unit, and the output end of the controller voltage stabilizing unit outputs the third voltage to the controller unit. When the battery power supply unit is insufficient in battery power, if the load unit is started and acts, the load unit consumes the electric energy of the battery through the direct-current boosting unit, and the voltage of the direct-current boosting unit and the voltage of the battery are further reduced. At this time, the stored energy storage capacitor C27 begins to discharge, and since the voltage of the energy storage capacitor is the boosted voltage, the electric quantity in the energy storage capacitor C27 is more, and the discharge voltage can be provided for a long time to be input to the input end of the controller voltage stabilizing unit, so that the controller voltage stabilizing unit outputs the third voltage, and the power supply of the controller unit circuit is ensured to be maintained. Due to the existence of the first diode and the second diode, when the first voltage and the second voltage drop, the two diodes are cut off, the energy storage capacitor is ensured to be supplied to the controller unit for use, and the controller unit is ensured not to restart. The small capacitor is charged through the boosted high voltage, so that the capacitance value of the energy storage capacitor is not required to be too large, the capacitor device occupies small circuit volume, and the cost of the small capacitor is low; and the charge and discharge of the energy storage capacitor are controlled through the switching characteristics of the first diode and the second diode, so that the defect that the cost for controlling the field effect switch tube by using the field effect switch tube and the switch control circuit in the prior art is too high is overcome.

Drawings

FIG. 1 is a schematic block diagram of a disclosed embodiment of the present utility model;

FIG. 2 is a schematic block diagram of another disclosed embodiment of the present utility model;

FIG. 3 is a schematic diagram of a DC boost circuit according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a charging and voltage stabilizing circuit according to one disclosed embodiment of the utility model;

FIG. 5 is a schematic circuit diagram of a controller unit according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a load switch circuit according to an embodiment of the present utility model;

FIG. 7 is a schematic diagram illustrating voltage division detection according to an embodiment of the present utility model;

fig. 8 is a schematic diagram of a water valve assembly with a power supply maintenance circuit according to one disclosed embodiment of the utility model.

Reference numerals illustrate:

10. a battery-powered unit that is configured to provide power to the battery,

20. a direct-current boosting unit, wherein the direct-current boosting unit comprises a direct-current boosting unit,

30. the voltage stabilizing unit of the controller is used for stabilizing the voltage of the power supply,

40. the controller unit is configured to control the operation of the controller unit,

50. a load switching unit for switching the load of the load-switching unit,

60. a load unit, which is connected with the load unit,

401. a voltage division detecting circuit for detecting the voltage division,

402. the circuitry of the LCD display is configured to display,

403. and (5) starting the circuit at fixed time.

Detailed Description

In order to describe the technical content, constructional features, achieved objects and effects of the technical solution in detail, the following description is made in connection with the specific embodiments in conjunction with the accompanying drawings.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of the phrase "in various places in the specification are not necessarily all referring to the same embodiment, nor are they particularly limited to independence or relevance from other embodiments. In principle, in the present utility model, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment may be combined in any manner to form a corresponding implementable technical solution.

Unless defined otherwise, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present utility model pertains; the use of related terms herein is for the purpose of describing particular embodiments only and is not intended to limit the utility model.

In the description of the present utility model, the term "and/or" is a representation for describing logical relationships between objects, which means that three relationships may exist, e.g., a and/or B, representing: there are three cases, a, B, and both a and B. In addition, the character "/" herein generally indicates that the context associated object is a logical relationship of a type "or".

In the present utility model, terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual number, order, or sequence of such entities or operations.

Without further limitation, the use of the terms "comprising," "including," "having," or other like terms in this specification is intended to cover a non-exclusive inclusion, such that a process, method, or article of manufacture that comprises a list of elements does not include additional elements but may include other elements not expressly listed or inherent to such process, method, or article of manufacture.

As in the understanding of "review guidelines," the expressions "greater than", "less than", "exceeding" and the like are understood to exclude this number in the present utility model; the expressions "above", "below", "within" and the like are understood to include this number. Furthermore, in the description of embodiments of the present utility model, the meaning of "a plurality of" is two or more (including two), and similarly, the expression "a plurality of" is also to be understood as such, for example, "a plurality of" and the like, unless specifically defined otherwise.

In the description of embodiments of the present utility model, spatially relative terms such as "center," "longitudinal," "transverse," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," etc., are used herein as a basis for the description of the embodiments or as a basis for the description of the embodiments, and are not intended to indicate or imply that the devices or components referred to must have a particular position, a particular orientation, or be configured or operated in a particular orientation and therefore should not be construed as limiting the embodiments of the present utility model.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "affixed," "disposed," and the like as used in the description of embodiments of the utility model should be construed broadly. For example, the "connection" may be a fixed connection, a detachable connection, or an integral arrangement; the device can be mechanically connected, electrically connected and communicated; it can be directly connected or indirectly connected through an intermediate medium; which may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the embodiments of the present utility model can be understood by those skilled in the art to which the present utility model pertains according to circumstances.

Referring to fig. 1 to 6, the present embodiment provides a circuit for maintaining power supply, which includes a battery power supply unit 10, a dc boost unit 20, an energy storage capacitor C27, a controller voltage stabilizing unit 30, a controller unit 40, a load switch unit 50 and a load unit 60; the battery power supply unit 10 provides a first voltage to the dc boost unit 20, the first voltage is input to the positive end of the first diode, the negative end of the first diode is connected to the input end of the controller voltage stabilizing unit 30, the dc boost unit 20 boosts the first voltage and outputs a second voltage, the power output end of the dc boost unit 20 is connected to the power end of the load unit 60, the second voltage is input as a charging voltage to the positive end of the second diode and then is connected to one end of the energy storage capacitor C27, the energy storage capacitor C27 is charged, the other end of the energy storage capacitor C27 is grounded, the non-grounded end of the energy storage capacitor C27 is connected to the input end of the controller voltage stabilizing unit 30, the controller voltage stabilizing unit 30 outputs a third voltage to the controller unit 40, the load switch control end of the controller unit 40 is connected to the control end of the load switch unit 50, the output end of the load switch unit 50 is connected to the load unit 60, and the controller unit 40 is connected to the load switch unit 60 through the switch unit 50.

And a battery power supply unit 10 for supplying the first voltage. The dc boost unit 20 is configured to boost the first voltage to the second voltage (e.g. 10V-20V, which is far greater than the battery voltage 3V). And a controller voltage stabilizing unit 30 for converting the voltage input into the controller voltage stabilizing unit into the third voltage to provide the required operating voltage for the controller unit 40. The controller unit 40 is configured to send a control signal to the load switch unit 50, and control the on/off of the load switch unit 50. And the load switch unit 50 is used for receiving the control signal sent by the controller unit and controlling the on and off of the switch. The load unit 60 is a load unit connected to the load switch unit 50.

The principle of the embodiment is as follows: according to the technical scheme, the first voltage provided by the battery power supply unit is divided into two paths of output, and one path of output is input into the input end of the controller voltage stabilizing unit after passing through the positive electrode end of the first diode; and one path of the voltage is boosted by the direct-current voltage boosting unit to output the second voltage. The second voltage is input into a power end of the load unit and used as the working voltage of the load unit; after the second voltage is connected with the second diode, the energy storage capacitor C27 is charged through a charging resistor; the non-grounding end of the energy storage capacitor C27 is connected with the input end of the controller voltage stabilizing unit, and the output end of the controller voltage stabilizing unit outputs the third voltage to the controller unit. When the battery power supply unit is insufficient in battery power, if the load unit is started and acts, the load unit consumes the electric energy of the battery through the direct-current boosting unit, the battery voltage is further reduced, the second voltage is also reduced, and the first diode and the second diode are cut off. At this time, the stored energy storage capacitor C27 begins to discharge, and because the energy storage voltage of the energy storage capacitor C27 is higher, the energy storage capacity is more, and the energy storage capacitor C27 provides the discharge voltage for a longer time to input the discharge voltage to the input end of the controller voltage stabilizing unit, so that the controller voltage stabilizing unit outputs the third voltage, and the power supply of the maintenance circuit is ensured for a period of time. The small capacitor is charged through the boosted high voltage, the capacitance value of the energy storage capacitor is not required to be too large, the capacitor device occupies small circuit volume, and the cost of the small capacitor is low; and the charge and discharge of the energy storage capacitor are controlled through the switching characteristics of the first diode and the second diode, so that the defect that the cost for controlling the field effect switch tube by using the field effect switch tube and the switch control circuit in the prior art is too high is overcome.

And then, due to the self-recovery phenomenon of the battery in the battery power supply unit, after a period of recovery time, the battery voltage is slowly recovered and increased, and after the battery voltage in the battery power supply unit is recovered to a first normal voltage, the battery power supply unit can continue to be used normally, and at the moment, the second voltage charges the energy storage capacitor C27 again so as to prepare for the battery power supply unit to have insufficient electric quantity again. This allows the load unit to operate at low battery levels without resetting the controller unit. In addition, when the battery is replaced, the controller unit can continue to work for a period of time due to the fact that a part of electric quantity exists in the energy storage capacitor, information (such as timing and the like) stored in the controller unit can be kept for a period of time, and the controller unit can continue to work after the battery is replaced, so that the problem of information loss caused by short battery replacement is avoided.

Further, referring to fig. 1 to 6, the battery power supply unit 10 is a dry battery.

In the embodiment, the dry battery has high energy conversion rate, stable and reliable energy supply, convenient use and easy replacement. When the electric energy of the dry battery is sufficient, the second voltage charges the energy storage capacitor C27 through the second diode, when the electric energy provided by the dry battery is insufficient, the first diode and the second diode are cut off, the energy storage capacitor C27 discharges through a loop, voltage is continuously provided to be input into the controller voltage stabilizing unit, the controller voltage stabilizing unit continuously outputs the third voltage, and the work of the controller unit is maintained. Due to the self-recovery phenomenon of the dry battery, the voltage is recovered after a period of time, the first voltage can be provided again, the operation of a subsequent circuit is ensured, and the second voltage can further charge the energy storage capacitor C27.

Further, referring to fig. 3, the dc boost unit 20 includes a dc boost chip U6, a third diode and a first inductor; the input power supply pin of the direct current boost chip U6 is connected with the output end of the battery power supply unit 10, the enabling pin of the direct current boost chip U6 and one end of the first inductor are connected with the battery power supply unit 10, the switch node pin of the direct current boost chip U6 is connected with the other end of the first inductor and is connected with the positive electrode end of the third diode, the negative electrode end of the third diode is connected with the voltage dividing circuit, the output end of the voltage dividing circuit is connected with the output feedback pin of the direct current boost chip U6, and the grounding pin of the direct current boost chip U6 is grounded.

In this embodiment, the dc boost chip U6 is configured to boost the first voltage output by the battery power supply unit, the first voltage output by the battery power supply unit is input to the input pin VIN of the dc boost chip U6, the switch node pin SW of the dc boost chip U6 is connected to the positive terminal of the third diode, and the negative terminal of the third diode outputs the second voltage.

The boosted second voltage is used for supplying the working voltage of the load unit, and the energy storage capacitor C27 is charged and stored through the second diode, so that the energy storage capacitor C27 can be used for discharging and supplying power when the electric quantity of the battery power supply unit is insufficient. In the utility model, the direct current boosting chip is adopted, so that the input voltage can be reliably boosted, the starting voltage is low, the quiescent current is small, the noise is small, and the external interference is small.

Further, referring to fig. 4, the controller voltage stabilizing unit 30 includes a dc voltage stabilizing chip U2; the power output end of the dc voltage-stabilizing chip U2 is connected to the power end of the controller unit 40, and the ground of the dc voltage-stabilizing chip U2 is grounded.

In this embodiment, the dc voltage stabilizing chip U2 is configured to convert an input high voltage into a low voltage, output the third voltage, and provide the third voltage to the working voltage of the controller unit. The first voltage output by the battery power supply unit is input into an input pin of the direct current voltage stabilizing chip U2 after passing through the first diode, the second voltage output by the direct current boosting unit is input into an output pin of the direct current voltage stabilizing chip U2 after passing through the second diode, the output pin of the direct current voltage stabilizing chip U6 outputs the third voltage, and the third voltage is input into an input end of the controller unit to provide the working voltage of the controller unit.

In the present utility model, since the operating voltage of the controller unit is required to be stable, the dc voltage stabilizing circuit is required at the front end of the controller unit. Compared with a direct current voltage stabilizing circuit adopting discrete components, the direct current voltage stabilizing chip can provide more stable output voltage and reduce the circuit volume.

Further, please refer to fig. 5, the controller unit includes a processor chip U1; the load switch control pin of the processor chip U1 is connected to the control end of the load switch unit 50 to control the on/off of the load unit 60.

In this embodiment, the processor chip U1 is configured to send a switch control signal to the load switch unit 50 to control the on/off of the load unit 60. The power input terminal VDD of the processor chip U1 is connected to the output terminal VDD of the controller voltage stabilizing unit 30. The processor chip can be a digital circuit chip such as an MCU, and the like, and can realize more powerful processing functions, but the processor chip does not need to participate in charge and discharge control of the energy storage capacitor in the utility model.

In a preferred embodiment, please refer to fig. 7, the controller unit further includes a voltage division detecting circuit 401; an input end of the voltage division detection circuit 401 is connected to a power output end of the dc boost unit 20, and an output end of the voltage division detection circuit 401 is connected to a voltage detection input pin of the processor chip U1.

In the preferred embodiment, the voltage division detection circuit 401 is configured to detect the voltage value of the second voltage after being divided, and input the detected value to the detection pin T2G/A2 of the processor chip U1 through the output terminal T2G/A2. The processor chip U1 receives the detected voltage value, analyzes whether the detected voltage value is lower than the voltage value for maintaining the normal operation of the load unit, and if the detected voltage value is lower than the voltage value for maintaining the normal operation of the load unit, the processor chip U1 does not send a control signal to the load switch unit 50 to control the load switch to be turned off.

The voltage division detection circuit ensures that the controller unit does not send a control signal to control the load switch unit to control the load switch to be turned off when the working voltage of the load unit is insufficient. The manager can find out that the load unit does not work to find out the problem reason.

In a preferred embodiment, referring to FIG. 5, the controller unit further includes an LCD display circuit 402; the input ends of the LCD display circuit 402 are respectively connected to the output pins of the LCD display circuit 402 of the processor chip U1.

In the preferred embodiment, the LCD display circuit is configured to receive the LCD output signal of the processor chip U1, and display information such as time, working state of the load unit, and alarm. The manager can conveniently check the information such as time, working state of the load unit, alarm and the like from the LCD display screen

Further, with continued reference to fig. 5, the controller unit further includes a timing start circuit 403; the timing start circuit 403 is connected to a plurality of timing setting pins (C2-C7) of the processor chip U1 through a plurality of key switches (K1-K6).

In this embodiment, the timing start circuit 403 sets the switching timing start time of the load switching unit 50 by inputting a signal to the processor chip U1 through a key. The processor chip U1 receives the timing start setting signal and sends a switch control signal to the load switch unit 50 to control the on/off of the load switch. The manager can conveniently set the switch timing starting time, the alarm rule and the like of the load switch unit.

Further, please refer to fig. 6, the load switch unit includes a dc driving chip U3; the enabling pin and the output control pin of the processor chip U1 are respectively connected with the enabling end and the input end of the direct current driving chip U3, the output end of the direct current driving chip U3 is connected with the load unit, and the driving power end of the direct current driving chip U3 is connected with the power end of the direct current boosting unit.

In this embodiment, the enable signal and the switch control signal sent by the enable pin EN1, the output control pin INF and the output control pin INR of the processor chip U1 are input to the EN1 enable terminal, the INF input terminal and the INR input terminal of the dc driving chip U3, and the output terminals OUT1 and OUT2 of the dc driving chip U3 respectively output the dc driving signal to the load unit 60 to control the operation of the load unit 60. The direct current driving chip has strong anti-interference capability, high pressure resistance and capacity and can stably drive the load unit to work.

Referring to fig. 8, the present embodiment provides a water valve device, which includes a circuit for maintaining power supply and a valve; the circuit for maintaining power supply is any one of the circuits for maintaining power supply in the above embodiments, and the circuit for maintaining power supply includes a load unit, where the load unit is an electromagnetic driving mechanism, and the electromagnetic driving mechanism is disposed on the valve.

In this embodiment, the water valve device is provided with any one of the circuits for maintaining power supply, so that the electromagnetic driving mechanism can maintain the normal operation of the subsequent circuits and devices through the voltage provided by the discharge of the energy storage capacitor 27 under the condition that the electric quantity of the battery power supply unit 10 is insufficient, and the problem that the controller unit is restarted due to the lack of electricity of the battery after the water valve is opened by the electromagnetic driving mechanism is solved.

It should be noted that, although the foregoing embodiments have been described herein, the scope of the present utility model is not limited thereby. Therefore, based on the innovative concepts of the present utility model, alterations and modifications to the embodiments described herein, or equivalent structures or equivalent flow transformations made by the present description and drawings, apply the above technical solutions directly or indirectly to other relevant technical fields, all of which are included in the scope of protection of the present patent.

Claims (10)

1. A circuit for maintaining power, characterized by: the device comprises a battery power supply unit, a direct current boosting unit, an energy storage capacitor C27, a controller voltage stabilizing unit, a controller unit, a load switch unit and a load unit; the battery power supply unit provides a first voltage for the direct current boost unit, the first voltage is input into the positive electrode end of the first diode, the negative electrode end of the first diode is connected with the input end of the controller voltage stabilizing unit, the direct current boost unit boosts the first voltage and outputs a second voltage, the power output end of the direct current boost unit is connected to the power end of the load unit, the second voltage is used as a charging voltage and is input into the positive electrode end of the second diode and then is connected with one end of the energy storage capacitor C27, the energy storage capacitor C27 is charged, the other end of the energy storage capacitor C27 is grounded, the non-grounded end of the energy storage capacitor C27 is connected with the input end of the controller voltage stabilizing unit, the controller voltage stabilizing unit outputs a third voltage to the controller unit, the load switch control end of the controller unit is connected with the control end of the load switch unit, the output end of the load switch unit is connected with the load unit, and the controller unit is controlled to switch with the load unit.

2. A circuit for maintaining a supply of power as defined in claim 1, wherein: the battery power supply unit is a dry battery.

3. A circuit for maintaining a supply of power as defined in claim 1, wherein: the direct-current boosting unit comprises a direct-current boosting chip U6, a third diode and a first inductor; the input power supply pin of direct current boost chip U6 with battery power supply unit's output is connected, the enabling pin of direct current boost chip U6 with the one end of first inductance with battery power supply unit connects, the switching node pin of direct current boost chip U6 is connected the other end of first inductance, and with the anodal end of third diode is connected, bleeder circuit is connected to the negative pole end of third diode, bleeder circuit's output is connected the output feedback pin of direct current boost chip U6, the ground connection pin of direct current boost chip U6 is earthed.

4. A circuit for maintaining a supply of power as defined in claim 1, wherein: the controller voltage stabilizing unit comprises a direct current voltage stabilizing chip U2; the power output end of the direct current voltage stabilizing chip U2 is connected with the power end of the controller unit, and the grounding end of the direct current voltage stabilizing chip U2 is grounded.

5. A circuit for maintaining a supply of power as defined in claim 1, wherein: the controller unit comprises a processor chip U1; the load switch control pin of the processor chip U1 is connected with the load switch unit to control the on-off of the load unit switch.

6. A circuit for maintaining a supply of power as defined in claim 5, wherein: the controller unit further comprises a voltage division detection circuit; the input end of the voltage division detection circuit is connected with the power output end of the direct current boosting unit, and the output end of the voltage division detection circuit is connected with the voltage detection input pin of the processor chip U1.

7. A circuit for maintaining a supply of power as defined in claim 5, wherein: the controller unit further comprises an LCD display circuit; and a plurality of input ends of the LCD display circuit are respectively connected with a plurality of output pins of the LCD display circuit of the processor chip U1.

8. A circuit for maintaining a supply of power as defined in claim 6, wherein: the controller unit further comprises a timing start circuit; the timing starting circuit is connected with a plurality of timing setting pins of the processor chip U1 through a plurality of key switches.

9. A circuit for maintaining a supply of power as defined in claim 5, wherein: the load switch unit comprises a direct current drive chip U3; the enabling pin and the output control pin of the processor chip U1 are respectively connected with the enabling end and the input end of the direct current driving chip U3, the output end of the direct current driving chip U3 is connected with the load unit, and the driving power end of the direct current driving chip U3 is connected with the power end of the direct current boosting unit.

10. A water valve assembly, characterized by: including circuits and valves to maintain power; the circuit for maintaining power supply is any one of the circuits for maintaining power supply in claims 1-9, the circuit for maintaining power supply comprises a load unit, the load unit is an electromagnetic driving mechanism, and the electromagnetic driving mechanism is arranged on the valve.