AC / DC integrated power supply circuit and induction bathroom product control system

Abstract

An alternating current and direct current integrated power supply circuit and a control system of an induction bathroom product, the alternating current and direct current integrated power supply circuit comprising: an AC-DC power supply circuit, a battery pack and a power supply switching circuit, the power supply switching circuit comprising a switching device capable of being switched between a first position and a second position, arranged to perform AC-DC processing on commercial power when there is commercial power input, output a first power supply voltage when the switching device is in the first position, and output a second power supply voltage when the switching device is in the second position; the battery pack comprising a first voltage output end for outputting a first positive voltage and a second voltage output end for outputting a second positive voltage; the power supply switching circuit is arranged to select the first power supply voltage or the first positive voltage to be output when the switching device is in the first position, and select the second power supply voltage or the second positive voltage to be output when the switching device is in the second position.

Description

Technical Field

[0001] This article relates to electronic product technology, particularly an AC / DC integrated power supply circuit and a control system for sensor-operated bathroom products. Background Technology

[0002] Sensor-operated bathroom products in the sanitary ware industry, such as sensor faucets or sensor urinals, can be powered by three or four AA batteries connected in series to output 4.5V or 6V. They can also be powered by an AC-DC adapter to convert 220V AC mains power to 5V or 6V DC. However, the installation environments for sensor-operated bathroom products vary. Some renovations have pre-installed 220V AC mains electrical outlets, while others do not. This causes some confusion for customers when choosing product configurations, and also requires product suppliers to stock various battery packs or adapter specifications, significantly increasing their material management costs. Summary of the Invention

[0003] This application provides an AC / DC integrated power supply circuit and a control system for sensor-operated bathroom products, which can realize integrated power supply from mains power and battery pack, solving the problem of needing to reserve mains power interface when installing sensor-operated bathroom products.

[0004] This application provides an AC-DC integrated power supply circuit, including: an AC-DC power supply circuit, a battery pack, and a power switching circuit, wherein the power switching circuit includes a switching device capable of switching between at least a first position and a second position;

[0005] The AC-DC power supply circuit is electrically connected to the switching device and is configured to perform AC-DC processing on the mains power when there is mains power input, output a first power supply voltage when the switching device is in the first position, and output a second power supply voltage when the switching device is in the second position.

[0006] The battery pack includes a first voltage output terminal for outputting a first positive voltage and a second voltage output terminal for outputting a second positive voltage. The first voltage output terminal and the second voltage output terminal are respectively connected to different input terminals of the switching device.

[0007] The power switching circuit is configured to output either the first power supply voltage or the first positive voltage when the switching device is in the first position, and to output either the second power supply voltage or the second positive voltage when the switching device is in the second position.

[0008] In one exemplary embodiment, the first supply voltage is greater than the first positive voltage, and the power switching circuit selects the first supply voltage to output when the switching device is in the first position and simultaneously receives the first supply voltage and the first positive voltage;

[0009] When the second supply voltage is greater than the second positive voltage, the power switching circuit selects the second supply voltage to output when the switching device is in the second position and simultaneously receives the second supply voltage and the second positive voltage.

[0010] In one exemplary embodiment, the AC-DC power supply circuit is an isolated flyback buck switching power supply.

[0011] In one exemplary embodiment, the AC-DC power supply circuit includes an AC-DC conversion circuit and a voltage feedback circuit; wherein,

[0012] The AC / DC conversion circuit is configured to convert AC mains voltage into DC power supply voltage.

[0013] The voltage feedback circuit is connected to the AC / DC conversion circuit and the switching device, and is configured to sample the DC power supply voltage to obtain a first sample voltage when the switching device is in a first position, and control the AC / DC conversion circuit to output the first power supply voltage based on the first sample voltage; and to sample the DC power supply voltage to obtain a second sample voltage when the switching device is in a second position, and control the AC / DC conversion circuit to output the second power supply voltage based on the second sample voltage.

[0014] In one exemplary embodiment, the voltage feedback circuit includes a sampling circuit, which includes a first branch, a second branch, and a third branch. Each branch includes at least one resistor, and the resistance value of the resistor in the second branch is less than the resistance value of the resistor in the third branch.

[0015] When the switching device is in the first position, the first branch and the second branch are connected, so that the voltage feedback circuit samples the DC power supply voltage to obtain a first sampling voltage; when the switching device is in the second position, the first branch and the third branch are connected, so that the voltage feedback circuit samples the DC power supply voltage to obtain a second sampling voltage.

[0016] In one exemplary embodiment, the voltage feedback circuit further includes a voltage regulator and an optocoupler; the voltage regulator is configured to use the first sampled voltage as a reference voltage when the switching device is in a first position, and to use the second sampled voltage as a reference voltage when the switching device is in a second position; the optocoupler is turned on when the reference voltage is greater than the reference voltage of the voltage regulator; and the optocoupler is turned off when the reference voltage is less than the reference voltage of the voltage regulator.

[0017] The AC / DC conversion circuit includes a power supply chip; the power supply chip includes a feedback pin, and the feedback pin of the power supply chip is connected to the optocoupler.

[0018] The power chip is configured such that when the optocoupler is turned on, the potential of its feedback pin decreases, the duty cycle of the output PWM signal decreases, and the DC power supply voltage of the AC-DC conversion circuit decreases; when the optocoupler is turned off, the potential of its feedback pin remains unchanged, the duty cycle of the output PWM signal increases, and the DC power supply voltage of the AC-DC conversion circuit increases.

[0019] In one exemplary embodiment, the switching device includes a first port, a second port and a third port arranged sequentially on a first side and along a first direction, a fourth port, a fifth port and a sixth port arranged sequentially on a second side and along the first direction, and a sliding portion located between the first side and the second side and capable of sliding back and forth along the first direction;

[0020] When the sliding part slides to the position that electrically connects the second port and the third port, and the fifth port and the sixth port, the switching device is in the first position; when the sliding part slides to the position that electrically connects the second port and the first port, and the fifth port and the fourth port, the switching device is in the second position.

[0021] In one exemplary embodiment, the power switching circuit further includes a first diode and a second diode;

[0022] The second port of the switching device is connected to the first branch of the sampling circuit, and the third port is connected to the second branch of the sampling circuit; the first port is connected to the third branch of the sampling circuit.

[0023] The fourth port of the switching device is connected to the first voltage output terminal of the battery pack, and the sixth port is connected to the second voltage output terminal of the battery pack; the fifth port is connected to the output terminal of the AC / DC integrated power supply circuit through the first diode.

[0024] The positive terminal of the second diode is connected to the voltage output terminal of the AC-DC power supply circuit, and the negative terminal is connected to the output terminal of the AC-DC integrated power supply circuit.

[0025] This application embodiment also provides a control system for a sensor-operated bathroom product, including: a sensing circuit, a power supply circuit, a control circuit, and a solenoid valve;

[0026] The power supply circuit is configured to supply power to the sensing circuit and the control circuit; the power supply circuit is any one of the AC / DC integrated power supply circuits described above.

[0027] The sensing circuit is configured to generate a sensing signal based on the signal given by the user that they wish to make the sensing bathroom product dispense water.

[0028] The control circuit is connected to the sensing circuit and is configured to generate a water outlet signal based on the sensing signal, thereby controlling the battery valve to open so that the sensing bathroom product can dispense water.

[0029] In one exemplary embodiment, the sensor-operated bathroom product includes a sensor-operated faucet and a sensor-operated urinal.

[0030] At least one embodiment of the AC / DC integrated power supply circuit of this application, through a power switching circuit, selects to output the first power supply voltage or the first positive voltage when the switching device is in the first position; and selects to output the second power supply voltage or the second positive voltage when the switching device is in the second position, thereby realizing integrated power supply of mains power and battery pack, and solving the problem of needing to reserve mains power interface when installing sensor bathroom products.

[0031] At least one embodiment of the AC / DC integrated power supply circuit of this application, by setting the first supply voltage to be greater than the first positive voltage, the power switching circuit selects the first supply voltage for output when the switching device is in the first position and simultaneously receives the first supply voltage and the first positive voltage; by setting the second supply voltage to be greater than the second positive voltage, the power switching circuit selects the second supply voltage for output when the switching device is in the second position and simultaneously receives the second supply voltage and the second positive voltage, thus enabling priority to be given to AC power supply when both AC and battery power are available.

[0032] Other features and advantages of this application will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the application. Other advantages of this application can be realized and obtained by means of the solutions described in the description and the accompanying drawings. Attached Figure Description

[0033] The accompanying drawings are used to provide an understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0034] Figure 1 This is a schematic diagram of an AC / DC integrated power supply circuit according to an embodiment of this application;

[0035] Figure 2 This is a schematic diagram of an AC-DC power supply circuit according to an embodiment of this application;

[0036] Figure 3 This is a schematic diagram of an AC / DC conversion circuit according to an embodiment of this application;

[0037] Figure 4 This is a schematic diagram of a voltage feedback circuit according to an embodiment of this application;

[0038] Figure 5 This is a schematic diagram of a power switching circuit according to an embodiment of this application;

[0039] Figure 6 This is a schematic diagram of another AC / DC integrated power supply circuit according to an embodiment of this application;

[0040] Figure 7 This is a schematic diagram of a control method for an AC / DC integrated power supply circuit according to an embodiment of this application;

[0041] Figure 8 This is a schematic diagram of the control system of the sensor-operated bathroom product according to an embodiment of this application. Detailed Implementation

[0042] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0043] Figure 1 This is a schematic diagram of an AC / DC integrated power supply circuit according to at least one embodiment of this application, as shown below. Figure 1 As shown, the AC-DC integrated power supply circuit includes an AC-DC power supply circuit, a battery pack, and a power switching circuit. The power switching circuit includes a switching device capable of switching between a first position and a second position.

[0044] The AC-DC power supply circuit is electrically connected to the switching device and is configured to perform AC-DC processing on the mains power when there is mains power input, output a first power supply voltage when the switching device is in the first position, and output a second power supply voltage when the switching device is in the second position.

[0045] The battery pack includes a first voltage output terminal for outputting a first positive voltage and a second voltage output terminal for outputting a second positive voltage. The first voltage output terminal and the second voltage output terminal are respectively connected to different input terminals of the switching device.

[0046] The power switching circuit is configured to output either the first power supply voltage or the first positive voltage when the switching device is in the first position, and to output either the second power supply voltage or the second positive voltage when the switching device is in the second position.

[0047] At least one embodiment of the AC / DC integrated power supply circuit of this application, through a power switching circuit, selects to output either the first power supply voltage or the first positive voltage when the switching device is in the first position; and selects to output either the second power supply voltage or the second positive voltage when the switching device is in the second position. This enables integrated power supply from mains power and battery pack, solving the problem of needing to reserve a mains power interface when installing sensor bathroom products. Furthermore, since different voltage specifications can be output according to different positions of the switching device, different power supply requirements can be met.

[0048] Here, AC mains power refers to 220 volt AC power. AC-DC processing refers to the process of converting AC power into DC power.

[0049] In one exemplary embodiment, the first supply voltage is 5 volts and the second supply voltage is 6 volts. The first positive voltage is 4.3 volts; the second positive voltage is 6 volts, which can meet the power supply requirements of the sensor-operated bathroom product through mains power or a battery pack.

[0050] In one exemplary embodiment, the first supply voltage is greater than the first positive voltage, and the power switching circuit selects the first supply voltage to output when the switching device is in the first position and simultaneously receives the first supply voltage and the first positive voltage;

[0051] When the second supply voltage is greater than the second positive voltage, the power switching circuit selects the second supply voltage to output when the switching device is in the second position and simultaneously receives the second supply voltage and the second positive voltage.

[0052] At least one embodiment of the AC / DC integrated power supply circuit of this application, by setting the first supply voltage to be greater than the first positive voltage, the power switching circuit selects the first supply voltage for output when the switching device is in the first position and simultaneously receives the first supply voltage and the first positive voltage; by setting the second supply voltage to be greater than the second positive voltage, the power switching circuit selects the second supply voltage for output when the switching device is in the second position and simultaneously receives the second supply voltage and the second positive voltage, thus enabling priority to be given to AC power supply when both AC and battery power are available.

[0053] In one exemplary embodiment, the AC-DC power supply circuit is an isolated flyback buck switching power supply.

[0054] Figure 2 This is a schematic diagram of an AC-DC power supply circuit according to an embodiment of this application, as shown below. Figure 2 As shown, the AC-DC power supply circuit includes an AC-DC conversion circuit and a voltage feedback circuit; wherein,

[0055] The AC / DC conversion circuit is configured to convert AC mains voltage into DC power supply voltage.

[0056] The voltage feedback circuit is connected to the AC / DC conversion circuit and the switching device, and is configured to sample the DC power supply voltage to obtain a first sample voltage when the switching device is in a first position, and control the AC / DC conversion circuit to output the first power supply voltage based on the first sample voltage; and to sample the DC power supply voltage to obtain a second sample voltage when the switching device is in a second position, and control the AC / DC conversion circuit to output the second power supply voltage based on the second sample voltage.

[0057] Figure 3 This is a schematic diagram of an AC / DC conversion circuit according to an embodiment of this application, as shown below. Figure 3 As shown, the AC / DC conversion circuit may include a rectifier module, a filter module, a power supply chip, and an output module;

[0058] The rectifier module is configured to rectify the AC mains voltage to obtain DC voltage.

[0059] The filtering module is configured to filter the DC power supply voltage;

[0060] The power chip is configured to output a PWM signal;

[0061] The output module includes a switching transistor and a transformer. It is configured to charge the primary winding of the transformer when the switching transistor is turned on under the action of the PWM signal, and when the switching transistor is turned off under the action of the PWM signal, the energy stored in the primary winding of the transformer is coupled to the secondary winding and auxiliary winding of the transformer, and the voltage of the secondary winding is output as the power supply voltage.

[0062] For example, the power chip may be an 8202 power chip.

[0063] For example, the rectifier module may be a bridge rectifier.

[0064] For example, the filter can be an electromagnetic compatibility (EMC) filter circuit.

[0065] Figure 4This is a schematic diagram of a voltage feedback circuit according to an embodiment of this application, as shown below. Figure 4 As shown, the voltage feedback circuit may include a sampling circuit, a voltage regulator, and an optocoupler;

[0066] The sampling circuit is configured to collect the DC power supply voltage.

[0067] The sampling circuit includes a first branch, a second branch, and a third branch. Each branch includes at least one resistor, and the resistance value of the resistor in the second branch is less than the resistance value of the resistor in the third branch.

[0068] When the switching device is in the first position, the first branch and the second branch are connected, so that the voltage feedback circuit samples the DC power supply voltage to obtain a first sampling voltage; when the switching device is in the second position, the first branch and the third branch are connected, so that the voltage feedback circuit samples the DC power supply voltage to obtain a second sampling voltage.

[0069] The voltage regulator is configured to use the first sampled voltage as a reference voltage when the switching device is in the first position, and the second sampled voltage as a reference voltage when the switching device is in the second position. When the reference voltage is greater than the reference voltage of the voltage regulator, the optocoupler is turned on; when the reference voltage is less than the reference voltage of the voltage regulator, the optocoupler is turned off.

[0070] The power chip in the AC / DC conversion circuit includes a feedback pin, which is connected to the optocoupler.

[0071] The power chip is configured such that when the optocoupler is turned on, the potential of its feedback pin decreases, the duty cycle of the output PWM signal decreases, and the DC power supply voltage of the AC-DC conversion circuit decreases; when the optocoupler is turned off, the potential of its feedback pin remains unchanged, the duty cycle of the output PWM signal increases, and the DC power supply voltage of the AC-DC conversion circuit increases.

[0072] Figure 5 This is a schematic diagram of a power switching circuit according to an embodiment of this application, as shown below. Figure 5 As shown, the power switching circuit includes a switching device, a first diode, and a second diode;

[0073] The switching device includes a first port, a second port and a third port arranged sequentially on the first side and along the first direction, a fourth port, a fifth port and a sixth port arranged sequentially on the second side and along the first direction, and a sliding part located between the first side and the second side and capable of sliding back and forth along the first direction;

[0074] When the sliding part slides to the position that electrically connects the second port and the third port, and the fifth port and the sixth port, the switching device is in the first position; when the sliding part slides to the position that electrically connects the second port and the first port, and the fifth port and the fourth port, the switching device is in the second position.

[0075] The second port of the switching device is connected to the first branch of the sampling circuit, and the third port is connected to the second branch of the sampling circuit; the first port is connected to the third branch of the sampling circuit.

[0076] The fourth port of the switching device is connected to the first voltage output terminal of the battery pack, and the sixth port is connected to the second voltage output terminal of the battery pack; the fifth port is connected to the output terminal of the AC / DC integrated power supply circuit through the first diode.

[0077] The positive terminal of the second diode is connected to the voltage output terminal of the AC / DC conversion circuit, and the negative terminal is connected to the output terminal of the AC / DC integrated power supply circuit.

[0078] Figure 6 This is a schematic diagram of another AC / DC integrated power supply circuit according to an embodiment of this application, as shown below. Figure 6 As shown in the figure, the AC-DC integrated power supply circuit includes an AC-DC power supply circuit, a power switching circuit, and a battery pack.

[0079] For the AC-DC power supply circuit, the mains voltage (220V AC voltage) passes through fuse F1 or a fusible resistor, and is then converted into DC voltage by the DB1 bridge rectifier (corresponding to the rectifier module mentioned above). It is then filtered by an anti-EMI electromagnetic compatibility filter circuit (corresponding to the filter module mentioned above), composed of the first inductor L1, the second inductor L2, the second capacitor EC2, and the third capacitor EC3. The first MOSFET Q1 operates in a regular switching motion under the control of the PWM signal output from the power chip U1. When the first MOSFET Q1 is on, the output voltage of the anti-EMI electromagnetic compatibility filter circuit passes through the primary winding of the first transformer T1A and the first MOSFET Q1 to ground, simultaneously charging the inductance of the primary winding of the first transformer T1A. When the first MOSFET is off, the energy stored in the primary winding of the first transformer T1A is coupled to the secondary winding and auxiliary winding of the first transformer T1A, and after rectification by diode D1 and filtering by the first capacitor EC1, it outputs V1 (corresponding to the first or second supply voltage mentioned above).

[0080] Figure 6The medium-voltage feedback circuit includes an optocoupler U2, a voltage regulator U3 (U3 can be a three-terminal regulator, including terminal A (anode), terminal K (cathode), and terminal R), C3, R4, R7, R2 (corresponding to the resistors in the first branch), R9 (corresponding to the resistors in the second branch), or R10 (corresponding to the resistors in the third branch). R2 and R9 or R10 form a sampling circuit to detect the V1 voltage. When the output V1 increases, terminals A and K of U3 are short-circuited, and the emitter of the optocoupler U2 is grounded, making pins 1 and 2 of the optocoupler conductive. Based on the optocoupler's characteristics, pins 3 and 4 are also conductive. The FB pin of the power chip U1 is connected to pin 4 of the optocoupler, thus grounding and pulling it low. The power chip U1 then adjusts its duty cycle and controls the switching frequency via GA to decrease the output V1 voltage. Conversely, when the output V1 decreases, the power switching circuit similarly detects the output V1 to feedback and control the output V1 voltage to increase, ultimately stabilizing the output V1.

[0081] Figure 6 Resistor R3 can supply power to power chip U1 in a timely manner when the entire circuit is powered on, so that power chip U1 can start up. It can also enable power chip U1 to detect the input voltage and perform automatic compensation to stabilize the output of the power supply system.

[0082] Diode D5, resistor R5, auxiliary winding of transformer T2B (i.e., auxiliary winding of the first transformer T1A), capacitors EC4 and C2 constitute the power supply circuit of power chip U1.

[0083] Resistor R1, capacitor C1 and diode D4 form a circuit with the primary winding of transformer T1A to discharge the remaining energy of the primary winding of transformer T1A when the first MOSFET Q1 is turned off.

[0084] The power switching circuit consists of a dual-position sliding switch RL1 (corresponding to the switching device mentioned above), diode D2 (corresponding to the second diode mentioned above), and diode D3 (corresponding to the first diode mentioned above). The anode of diode D2 is connected to the output V1, and the cathode is connected to the output Vdc of the entire circuit. The anode of diode D3 is connected to pin 5 of the dual-position sliding switch RL1, and the cathode is also connected to the output Vdc of the entire circuit. The dual-position sliding switch RL1 can control the on / off state of two independent switches with one button. When the dual-position sliding switch RL1 is switched to position a, pins 2 and 3 of the dual-position sliding switch RL1 are turned on, and pins 5 and 6 are also turned on; when the dual-position sliding switch RL1 is switched to the other position (b), pins 1 and 2 of the dual-position sliding switch RL1 are turned on, and pins 4 and 5 are also turned on; pin 1 of the dual-position sliding switch RL1 is also grounded through resistor R9.

[0085] The first voltage output terminal of the battery pack is connected to pin 6 of the dual-position slide switch RL1, and the negative terminal of the battery pack is grounded. The second voltage output terminal of the battery pack is connected to pin 4 of the dual-position slide switch RL1.

[0086] Figure 7 This is a schematic diagram illustrating a control method for an AC / DC integrated power supply circuit according to an embodiment of this application. The control method first uses a dual-position sliding switch RL1 in the power switching circuit to control the series power supply switching of three or four batteries, resulting in an output DC of 4.5V or 6V. Secondly, the dual-position sliding switch RL1 in the power switching circuit synchronously switches the reference voltage U3 in the AC-DC power supply circuit, achieving an output DC of 5V or 6V. Based on the definition of potential difference and the flow law of current in electricity, current usually flows from a high potential area to a low potential area; therefore, the output DC voltage of the AC-DC power supply circuit is set to 5V and 6.2V respectively. When the dual-position slide switch RL1 of the power switching circuit is set to one of the positions, the output DC voltage of the AC-DC power circuit (5V or 6.2V) is always higher than the potential of the battery pack's output (4.5V or 6V). This ensures that when both the battery and AC-DC power circuits are outputting simultaneously, the AC-DC power circuit always takes priority, saving battery power. Simultaneously, in the event of a mains power outage, the system automatically switches to battery power, providing power failure protection. Ultimately, this ensures a stable power supply to the bathroom product's electrical control system, guaranteeing product performance and reliability.

[0087] The specific implementation scheme of the control method for the AC / DC integrated power supply circuit is as follows:

[0088] When the dual-position slide switch RL1 of the power switching circuit is set to one of the positions, as shown in the schematic diagram... Figure 5 The slide switch shown is located at point a. In the double-position slide switch RL1, pins 2 and 3 and pins 5 and 6 are short-circuited and connected.

[0089] The positive terminals of the three batteries in the battery pack are connected through pins 5 and 6 of RL1 to output V2. Defining one battery as 1.5V, V2 = 3 * 1.5V = 4.5V. Similarly, short-circuiting pins 2 and 3 of RL1 connects R2 and R9 in series in the AC-DC power supply circuit, causing them to divide the voltage and supply it to U3 (which can be a TL431 regulator) for sampling. Based on the reference voltage of U3, the AC-DC power supply output V1 = 5.2V. Next, it is determined whether V1 and V2 are equal. Clearly, regardless of whether the battery pack is connected, V1 is still greater than V2. Therefore, the AC-DC power supply outputs Vdc = V1 - VD2 through diode D2. Assuming VD2 = 0.2V, Vdc = 5.2V - 0.2V = 5V. If the AC-DC power supply is not connected to 220V, that is, V2 is greater than V1, the three battery packs are powered by diode D3, and the output Vdc = V2 - VD3. Assuming VD3 = 0.2V, Vdc = 4.5V - 0.2V = 4.3V.

[0090] When the dual-position sliding switch RL1 of the power switching circuit is set to another position, the sliding switch is located at point b, and pins 1 and 2 and pins 4 and 5 of the dual-position sliding switch RL1 are short-circuited and conduct. The positive terminals of the three batteries in the battery pack are disconnected. One battery in the battery pack forms a series connection with the other three, and its positive terminal is connected through pins 4 and 5 of RL1 to output V2. Assuming one battery is 1.5V, V2 = 4 * 1.5V = 6V. Similarly, short-circuiting pins 1 and 2 of RL1 connects R2 and R10 in series, causing them to conduct and divide the voltage for sampling by U3. Based on the reference voltage of U3, the AC-DC power supply output V1 = 6.2V. Next, we check the difference between V1 and V2. Clearly, regardless of whether the battery pack is connected, V1 is still greater than V2. Therefore, the AC-DC power supply outputs Vdc = V1 - VD2 through diode D2. Assuming VD2 = 0.2V, Vdc = 6.2V - 0.2V = 6V. If the AC-DC power supply is not connected to 220V, that is, V2 is greater than V1, the power output of the 4-cell battery pack through diode D3 is Vdc = V2 - VD3. Assuming VD3 = 0.2V, Vdc = 6V - 0.2V = 5.8V.

[0091] By setting the dual-position sliding switch RL1 of the power switching circuit to position a or b, the AC-DC power circuit can output two voltages: 5V and 6V. It can also output two voltages with 3 or 4 batteries when there is no mains power supply to the AC-DC power circuit.

[0092] When this AC / DC integrated power supply circuit control method is applied to sensor bathroom products such as sensor faucets or sensor urinals, it can not only achieve two input voltage specifications (generally, the power supply specifications of sensor bathroom products are 5V output from the adapter or 4.5V output from 3 battery packs, or 6V output from the adapter or 6V output from 4 battery packs) by setting the dual-position sliding switch RL1 of the power switching circuit to position a or b, but also continue to supply power to the bathroom products through the battery pack when the mains power fails during product use, provided that there is a 220V mains power supply and the battery pack is equipped with batteries, bringing convenience to users.

[0093] The control method of this AC-DC integrated power supply circuit, by setting the dual-position sliding switch RL1 of the power switching circuit to position a or b, can ensure that the 220V AC power supply from the mains and the DC power supply from the battery pack do not affect each other. Furthermore, the two output modes of the AC-DC power supply circuit and the power output of the 3 or 4 battery packs are independent of each other and do not interfere with each other.

[0094] Figure 8 As an embodiment of this application, a control system for a sensor-operated bathroom product is provided, such as... Figure 8 As shown, the control system includes: a sensing circuit, a power supply circuit, a control circuit, and a solenoid valve;

[0095] The power supply circuit is configured to supply power to the sensing circuit and the control circuit; the power supply circuit is any one of the AC / DC integrated power supply circuits described above.

[0096] The sensing circuit is configured to generate a sensing signal based on the signal given by the user that they wish to make the sensing bathroom product dispense water.

[0097] The control circuit is connected to the sensing circuit and is configured to generate a water outlet signal based on the sensing signal, thereby controlling the battery valve to open so that the sensing bathroom product can dispense water.

[0098] For example, sensor-operated bathroom products can be sensor-operated faucets.

[0099] For example, sensor-operated bathroom products can be sensor-operated urinals.

[0100] This application describes several embodiments, but these descriptions are exemplary and not restrictive, and it will be apparent to those skilled in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with, or may replace, any feature or element of any other embodiment.

[0101] This application includes and contemplates combinations of features and elements known to those skilled in the art. The embodiments, features, and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive scheme as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive schemes to form another unique inventive scheme as defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this application may be implemented individually or in any suitable combination. Therefore, the embodiments are not limited except by the limitations imposed by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.

[0102] Furthermore, in describing representative embodiments, the specification may have presented methods and / or processes as a specific sequence of steps. However, the method or process should not be limited to the specific order of steps described herein, to the extent that it does not depend on such a specific order. As will be understood by those skilled in the art, other sequences of steps are also possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation of the claims. Moreover, the claims concerning the method and / or process should not be limited to the steps performed in the written order, and those skilled in the art will readily understand that these orders can be varied and still remain within the spirit and scope of the embodiments of this application.

[0103] It will be understood by those skilled in the art that all or some of the steps, systems, or apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware implementations, the division between functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit (ASIC). Such software may be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

Claims

1. An AC / DC integrated power supply circuit, characterized in that, The AC-DC power supply circuit, the battery pack and the power supply switching circuit, the switching device being capable of switching between at least a first position and a second position, wherein; The AC-DC power supply circuit is electrically connected with the switching device, and is configured to perform AC-DC processing on the mains power when there is mains input, output a first power supply voltage when the switching device is in the first position, and output a second power supply voltage when the switching device is in the second position; The battery pack comprises a first voltage output end for outputting a first positive voltage and a second voltage output end for outputting a second positive voltage, and the first voltage output end and the second voltage output end are respectively connected to different input ends of the switching device; The power supply switching circuit is configured to select the first power supply voltage or the first positive voltage to output when the switching device is in the first position, and select the second power supply voltage or the second positive voltage to output when the switching device is in the second position.

2. The AC-DC power supply circuit according to claim 1, wherein; The first power supply voltage is greater than the first positive voltage, and the power supply switching circuit selects the first power supply voltage to output when the switching device is in the first position and the first power supply voltage and the first positive voltage are received at the same time; The second power supply voltage is greater than the second positive voltage, and the power supply switching circuit selects the second power supply voltage to output when the switching device is in the second position and the second power supply voltage and the second positive voltage are received at the same time.

3. The AC-DC power supply circuit according to claim 1, wherein; The AC-DC power supply circuit is an isolated flyback step-down switching power supply.

4. The AC-DC power supply circuit according to claim 3, wherein; The AC-DC power supply circuit comprises an AC-DC conversion circuit and a voltage feedback circuit, wherein; The AC-DC conversion circuit is configured to convert an AC mains voltage into a DC power supply voltage; The voltage feedback circuit is connected with the AC-DC conversion circuit and the switching device, and is configured to sample the DC power supply voltage to obtain a first sampling voltage when the switching device is in the first position, control the AC-DC conversion circuit to output the first power supply voltage based on the first sampling voltage, and sample the DC power supply voltage to obtain a second sampling voltage when the switching device is in the second position, control the AC-DC conversion circuit to output the second power supply voltage based on the second sampling voltage.

5. The AC-DC power supply circuit according to claim 4, wherein; The voltage feedback circuit comprises a sampling circuit, and the sampling circuit comprises a first branch, a second branch and a third branch, each branch comprising at least one resistor, and the resistance value of the resistor in the second branch is smaller than the resistance value of the resistor in the third branch. ​ The switching device is in the first position, the first branch and the second branch are turned on, so that the voltage feedback circuit samples the supply voltage of the direct current to obtain a first sampling voltage; the switching device is in the second position, the first branch and the third branch are turned on, so that the voltage feedback circuit samples the supply voltage of the direct current to obtain a second sampling voltage. 6.The AC-DC integrated power supply circuit of claim 5, wherein The voltage feedback circuit further comprises a voltage stabilizer and an optocoupler; the voltage stabilizer is configured to take the first sampling voltage as a reference voltage when the switching device is in the first position, and take the second sampling voltage as the reference voltage when the switching device is in the second position; when the reference voltage is greater than a reference voltage of the voltage stabilizer, the optocoupler is turned on; when the reference voltage is less than the reference voltage of the voltage stabilizer, the optocoupler is turned off; The AC-DC conversion circuit comprises a power supply chip; the power supply chip comprises a feedback pin, and the feedback pin of the power supply chip is connected with the optocoupler; The power supply chip is configured to reduce the potential of the feedback pin and reduce the duty cycle of the PWM signal output by the power supply chip when the optocoupler is turned on, so that the supply voltage of the direct current output by the AC-DC conversion circuit is reduced; when the optocoupler is turned off, the potential of the feedback pin of the power supply chip is unchanged, and the duty cycle of the PWM signal output by the power supply chip is increased, so that the supply voltage of the direct current output by the AC-DC conversion circuit is increased. 7.The AC-DC integrated power supply circuit of claim 6, wherein The switching device comprises a first port, a second port and a third port arranged in sequence in a first direction on a first side, a fourth port, a fifth port and a sixth port arranged in sequence in the first direction on a second side, and a sliding part located between the first side and the second side and capable of sliding back and forth in the first direction; The switching device is in the first position when the sliding part slides to a position in which the second port and the third port, and the fifth port and the sixth port are electrically connected; The switching device is in the second position when the sliding part slides to a position in which the second port and the first port, and the fifth port and the fourth port are electrically connected. 8.The AC-DC integrated power supply circuit of claim 7, wherein The power supply switching circuit further comprises a first diode and a second diode; The second port of the switching device is connected to the first branch of the sampling circuit, and the third port of the switching device is connected to the second branch of the sampling circuit; the first port of the switching device is connected to the third branch of the sampling circuit; The fourth port of the switching device is connected to the first voltage output end of the battery pack, and the sixth port of the switching device is connected to the second voltage output end of the battery pack; the fifth port of the switching device is connected to the output end of the AC-DC integrated power supply circuit through the first diode; The anode of the second diode is connected to the voltage output end of the AC-DC power supply circuit, and the cathode of the second diode is connected to the output end of the AC-DC integrated power supply circuit. comprise:

9. A control system for an induction bathroom product, characterized in that an induction circuit, a power supply circuit, a control circuit and an electromagnetic valve; The power supply circuit is configured to supply power to the induction circuit and the control circuit. ​ The power supply circuit is the AC-DC integrated power supply circuit of any one of claims 1 to 8; The induction circuit is configured to generate an induction signal according to a signal given by a user to make the induction sanitary product produce water; The control circuit is connected with the induction circuit and configured to generate a water production signal according to the induction signal to control the battery valve to open to make the induction sanitary product produce water.

10. The control system of the induction sanitary product according to claim 9, wherein The induction sanitary product comprises an induction faucet and an induction urinal.

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