Hydroelectric generator output circuit, shower and electric energy conversion method

Abstract

The invention discloses a hydroelectric generator output circuit, a shower and an electric energy conversion method, and belongs to the technical field of bathroom accessories. The hydroelectric generator output circuit comprises a rectification module, an overvoltage protection module, a voltage stabilization module, a channel identification switching module, a high-voltage channel module, a low-voltage channel module, a charging management module and a load interaction module. The rectifier module is used for rectifying alternating current power output by the hydroelectric generator into direct current power; the overvoltage protection module is used for detecting the DC power supply so as to output the DC power supply in a preset voltage range. The voltage stabilization module is used for outputting reference voltage to the channel identification switching module; the channel identification switching module is used for respectively controlling the on-off states of the high-voltage channel module and the low-voltage channel module according to the reference voltage and the direct-current power supply output by the overvoltage protection module; the low-voltage channel module is used for supplying power to the charging management module and the load interaction module. According to the invention, the electric energy conversion efficiency can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bathrooms, and in particular to a hydroelectric generator output circuit, a shower and an electric energy conversion method. Background Art

[0002] Hydroelectric generators rely on water energy to generate electricity. They have the advantages of energy saving, environmental protection, safe electricity use, and no need to charge. They have been widely used in the bathroom industry. With the rapid development of hydroelectric generators in recent years, the output power of hydroelectric generators has increased from 0.2W to more than 5W under the same flow rate.

[0003] Usually, in order to achieve functional expansion when the shower is not running, such as remote cold water pre-drainage, WIFI, Bluetooth and other applications, a high-power hydroelectric generator is often used together with a lithium battery. Before the water is started, the lithium battery is used for power supply; after the water is started, the power supply is changed from the lithium battery to the hydroelectric generator, which drives the load to charge the lithium battery at the same time. The output power of the hydroelectric generator often increases exponentially with the size of the water flow. Therefore, how to meet the conversion efficiency improvement under high and low flow rates is extremely important.

[0004] The existing technology mainly realizes voltage conversion through a set of DC-DC step-down conversion circuits, reducing the output of the hydroelectric generator from the range of 4.5-80V to 5V for voltage stabilization. However, due to the large input voltage difference, the average efficiency is about 77%, among which:

[0005] Under high flow (0.5Mpa, 22L / min), the power of the hydroelectric generator can reach 5W, the DC-DC conversion efficiency is 80%, and the chip loss is 1W, which will cause the chip to heat up seriously, with the surface temperature of about 75℃, greatly shortening the chip life, and the potting sealant may deform and melt due to high temperature;

[0006] At low flow (0.1Mpa, 4.56L / min), the power generation is reduced to less than 0.5W. According to the chip specification, the larger the DC-DC voltage difference, the smaller the load current, that is, the lower the conversion efficiency, only 75%, and the loss is about 25%, resulting in the power of the hydroelectric generator cannot be fully and effectively used, and the lithium battery charging efficiency becomes low. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a hydroelectric generator output circuit, a shower and an electric energy conversion method, which can effectively improve the electric energy conversion efficiency.

[0008] In order to solve the above technical problems, on the one hand, an embodiment of the present invention provides a hydroelectric generator output circuit for a shower, comprising: a rectifier module, an overvoltage protection module, a voltage stabilizing module, a channel identification and switching module, a high-voltage channel module, a low-voltage channel module, a charging management module and a load interaction module; the rectifier module is connected to the hydroelectric generator, and is used to rectify the AC power output by the hydroelectric generator into a DC power supply; the overvoltage protection module is connected to the rectifier module, and is used to detect the DC power supply to output a DC power supply within a preset voltage range; the voltage stabilizing module is connected to the channel identification and switching module, and is used to output a reference voltage to the channel identification and switching module; the channel identification and switching module is connected to the overvoltage protection module, and is used to control the on-off states of the high-voltage channel module and the low-voltage channel module respectively according to the reference voltage and the DC power output by the overvoltage protection module; the low-voltage channel module is respectively connected to the charging management module and the load interaction module, and is used to supply power to the charging management module and the load interaction module.

[0009] As an improvement of the above scheme, the channel identification and switching module includes a comparator, a second switch tube, a fourth switch tube, and a fifth switch tube; the comparator compares the DC power supply with a reference voltage, wherein when the DC power supply is greater than the reference voltage, the second switch tube is turned off to prohibit the DC power supply output by the overvoltage protection module from being directly input into the low-voltage channel module, and at the same time, the fourth switch tube and the fifth switch tube are turned on, so that the DC power supply output by the overvoltage protection module is sequentially stepped down by the high-voltage channel module and the low-voltage channel module for secondary voltage reduction, and when the DC power supply is less than or equal to the reference voltage, the second switch tube is turned on to allow the DC power supply output by the overvoltage protection module to be stepped down by the low-voltage channel module for primary voltage reduction, and at the same time, the fourth switch tube and the fifth switch tube are turned off to prohibit the DC power supply output by the overvoltage protection module from being input into the high-voltage channel module.

[0010] As an improvement of the above scheme, the channel identification switching module includes a comparator, a first voltage-dividing resistor group, a second voltage-dividing resistor group, a second switch tube, a fourth switch tube, a fifth switch tube, a sixth switch tube and a seventh switch tube; the first voltage-dividing resistor group divides the reference voltage output by the voltage stabilizing module, and sends the divided voltage to the comparator; the second voltage-dividing resistor group divides the DC power supply output by the overvoltage protection module, and sends the divided real-time power supply to the comparator; the comparator compares the real-time power supply with the divided voltage, wherein, when the real-time power supply is greater than the divided voltage, ... The seventh switch tube is turned on, the sixth switch tube is turned off, the second switch tube is turned off, and the fifth switch tube is turned on and supplies power to the high-voltage channel module. At the same time, the fourth switch tube is turned on and supplies power to the low-voltage channel module, so that the DC power output by the overvoltage protection module is sequentially stepped down by the high-voltage channel module and the low-voltage channel module. When the real-time power supply is less than or equal to the divided voltage, the seventh switch tube is turned off, the fourth switch tube is turned off, the fifth switch tube is turned off, the sixth switch tube is turned on, and the second switch tube is turned on and supplies power to the low-voltage channel module, so that the DC power output by the overvoltage protection module is stepped down by the low-voltage channel module.

[0011] As an improvement of the above scheme, the channel identification switching module includes a comparator, a first voltage-dividing resistor group, a second voltage-dividing resistor group, a third voltage-dividing resistor group, a second switch tube, a fourth switch tube, a fifth switch tube, a sixth switch tube and a seventh switch tube; the voltage stabilizing module is connected to the comparator through the first voltage-dividing resistor group, the overvoltage protection module is connected to the comparator through the second voltage-dividing resistor group, and the overvoltage protection module is also connected to the sixth switch tube through the third voltage-dividing resistor group; the inverting input end of the comparator is connected to the voltage dividing point of the first voltage-dividing resistor group, the non-phase input end is connected to the voltage dividing point of the second voltage-dividing resistor group, and the output end is connected to the seventh switch tube The base of the seventh switch tube is grounded; the gate of the sixth switch tube is respectively connected to the voltage dividing point of the third voltage dividing resistor group, the drain of the fourth switch tube and the drain of the fifth switch tube, the source of the sixth switch tube is grounded, and the drain of the sixth switch tube is connected to the gate of the second switch tube; the source of the second switch tube is connected to the output end of the overvoltage protection module, and the drain is connected to the input end of the low-voltage channel module; the source of the fourth switch tube is connected to the output end of the high-voltage channel module, and the drain is connected to the input end of the low-voltage channel module; the source of the fifth switch tube is connected to the output end of the overvoltage protection module, and the drain is connected to the input end of the high-voltage channel module.

[0012] As an improvement of the above scheme, the overvoltage protection module includes a first switching tube; when the DC power output by the rectifier module exceeds a preset voltage range, the first switching tube is cut off to prohibit the overvoltage protection module from outputting DC power to the channel identification switching module; when the DC power output by the rectifier module is within a preset voltage range, the first switching tube is turned on to enable the overvoltage protection module to output DC power to the channel identification switching module.

[0013] As an improvement of the above scheme, the overvoltage protection module includes a fourth voltage regulator diode, a first switch tube and a third switch tube; when the DC power output by the rectifier module exceeds a preset voltage range, the fourth voltage regulator diode is turned on, the third switch tube is turned on and the first switch tube is turned off, so as to prohibit the overvoltage protection module from outputting DC power to the channel identification switching module; when the DC power output by the rectifier module is within a preset voltage range, the fourth voltage regulator diode is turned off, the third switch tube is turned off and the first switch tube is turned on, so that the overvoltage protection module outputs DC power to the channel identification switching module.

[0014] As an improvement of the above scheme, the overvoltage protection module includes a second resistor, a third resistor, a sixth resistor, a ninth resistor, a first voltage regulator diode, a fourth voltage regulator diode, a first switch tube and a third switch tube; the positive electrode of the fourth voltage regulator diode is grounded, and the negative electrode is connected to the output end of the rectifier module through the second resistor; the positive electrode of the first voltage regulator diode is connected to the negative electrode of the fourth voltage regulator diode through the sixth resistor, and the negative electrode of the first voltage regulator diode is connected to the output end of the rectifier module; the base of the third switch tube is connected to the positive electrode of the first voltage regulator diode, the emitter is connected to the output end of the rectifier module, and the collector is grounded through the ninth resistor; the source of the first switch tube is connected to the output end of the rectifier module, the gate is grounded through the ninth resistor, and the drain is connected to the input end of the channel identification switching module.

[0015] On the other hand, an embodiment of the present invention further provides a shower, comprising a shower body, a battery, a hydroelectric generator and the hydroelectric generator output circuit as described in any one of claims 1 to 5, wherein the battery, the hydroelectric generator and the hydroelectric generator output circuit are all arranged in the shower body, the hydroelectric generator is connected to the rectifier module of the hydroelectric generator output circuit, and the battery is respectively connected to the voltage stabilizing module, the charging management module and the load interaction module of the hydroelectric generator output circuit.

[0016] On the other hand, an embodiment of the present invention further provides a method for converting electric energy of a hydraulic generator for a shower, comprising: rectifying the AC power output by the hydraulic generator into a DC power supply; comparing the DC power supply with a preset voltage range, and outputting the DC power supply when the DC power supply is within the preset voltage range; determining whether the DC power supply is greater than the reference voltage, and if not, disconnecting the high-pressure channel module and turning on the low-pressure channel module to perform a first-level voltage reduction on the DC power supply through the low-pressure channel module, and if yes, turning on the high-pressure channel module and the low-pressure channel module to perform a second-level voltage reduction on the DC power supply through the high-pressure channel module and the low-pressure channel module in turn; the low-pressure channel module supplies power to a battery and a load.

[0017] As an improvement of the above scheme, the step of judging whether the DC power supply is greater than the reference voltage includes: performing voltage dividing processing on the DC power supply to output a real-time power supply; performing voltage dividing processing on the reference voltage to output a divided voltage; and comparing the real-time power supply with the divided voltage to judge whether the DC power supply is greater than the reference voltage.

[0018] Implementing the embodiments of the present invention has the following beneficial effects:

[0019] The output circuit of the hydroelectric generator of the present invention can monitor the real-time input DC power supply by introducing a channel identification switching module, and specifically control the conduction state of the high-voltage channel module and the low-voltage channel module, thereby effectively improving the power conversion efficiency. Specifically:

[0020] In the case of high flow, the high-pressure channel module and the low-pressure channel module are turned on at the same time, and the DC power supply is first reduced in pressure through the high-pressure channel module, and then reduced in pressure twice through the low-pressure channel module, thereby realizing the secondary pressure reduction of the DC power supply;

[0021] In the case of low flow, the high-pressure channel module is cut off, the low-pressure channel module is turned on, and the DC power supply is directly reduced in one level through the low-pressure channel module. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of an embodiment of a hydroelectric generator output circuit for a shower according to the present invention;

[0023] Figure 2 It is a circuit diagram of the first embodiment of the rectifier module, overvoltage protection module, voltage stabilization module and channel identification and switching module in the present invention;

[0024] Figure 3 is a structural schematic diagram of a second embodiment of an overvoltage protection module in the present invention;

[0025] Figure 4is a structural schematic diagram of a third embodiment of an overvoltage protection module in the present invention;

[0026] Figure 5 It is a schematic structural diagram of a second embodiment of the channel identification and switching module in the present invention;

[0027] Figure 6 2 is a schematic structural diagram of a third embodiment of a channel identification and switching module in the present invention;

[0028] Figure 7 is a circuit diagram of an embodiment of a high-voltage channel module of the present invention;

[0029] Figure 8 It is a circuit diagram of an embodiment of a low-voltage channel module of the present invention;

[0030] Fig. 9 is a circuit diagram of an embodiment of a charging management module in the present invention;

[0031] Fig.10 is a circuit diagram of an embodiment of a load interaction module in the present invention;

[0032] Fig.11 It is a graph of the power conversion efficiency of the existing hydroelectric generator output circuit;

[0033] Fig.12 is a curve diagram of electric energy conversion efficiency of the high-voltage channel module of the present invention;

[0034] Fig.13 It is a curve diagram of electric energy conversion efficiency of the low-voltage channel module of the present invention;

[0035] Fig.14 is a schematic diagram of the structure of an embodiment of a shower device of the present invention;

[0036] Fig.15 The present invention is a flow chart of an embodiment of the method for converting electric energy of a hydroelectric generator used for a shower. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0038] See also Figure 1 , Figure 1 The embodiment of the hydroelectric generator output circuit 100 for a shower of the present invention is shown, which includes a rectifier module 1, an overvoltage protection module 2, a voltage stabilizing module 3, a channel identification and switching module 4, a high-voltage channel module 5, a low-voltage channel module 6, a charging management module 7 and a load interaction module 8. Specifically:

[0039] The rectifier module 1 is connected to the hydroelectric generator and is used to rectify the AC power output by the hydroelectric generator into a DC power supply;

[0040] The overvoltage protection module 2 is connected to the rectifier module 1 and is used to detect the DC power supply to output a DC power supply within a preset voltage range;

[0041] The voltage stabilizing module 3 is connected to the channel identification switching module 4 and is used to output a reference voltage to the channel identification switching module 4;

[0042] The channel identification switching module 4 is connected to the overvoltage protection module 2, and is used to control the on / off states of the high-voltage channel module 5 and the low-voltage channel module 6 respectively according to the reference voltage and the DC power supply output by the overvoltage protection module 2;

[0043] The low-voltage channel module 6 is connected to the charging management module 7 and the load interaction module 8 respectively, and is used to supply power to the charging management module 7 and the load interaction module 8 .

[0044] When working, the rectifier module 1 rectifies the AC power output by the hydroelectric generator into a DC power supply, and then detects the DC power supply through the overvoltage protection module 2 to output the DC power supply within a preset voltage range to the channel identification and switching module 4; at the same time, the voltage stabilizing module 3 outputs a reference voltage to the channel identification and switching module 4; then, the channel identification and switching module 4 controls the on and off states of the high-voltage channel module 5 and the low-voltage channel module 6 respectively according to the reference voltage and the DC power supply, so as to perform targeted conversion of the DC power supply; finally, the converted electric energy is output to the battery for charging through the charging management module 7, and is output to the load through the load interaction module 8.

[0045] Therefore, the output circuit of the hydroelectric generator of the present invention can monitor the real-time input DC power supply by introducing a channel identification switching module, and specifically control the conduction state of the high-voltage channel module and the low-voltage channel module, thereby effectively improving the power conversion efficiency.

[0046] The following describes the rectifier module 1, the overvoltage protection module 2, the voltage stabilizing module 3, the channel identification and switching module 4, the high-voltage channel module 5, the low-voltage channel module 6, the charging management module 7 and the load interaction module 8 respectively in conjunction with the specific circuit diagram:

[0047] 1. Rectifier module 1

[0048] It should be noted that the rectifier module 1 may be a rectifier chip or a rectifier bridge, but is not limited thereto, as long as the AC power output by the hydroelectric generator can be rectified into a DC power.

[0049] like Figure 2As shown, in this embodiment, the rectifier module 1 is a rectifier chip D3 , the input end of the rectifier chip D3 is connected to the output end of the hydroelectric generator through the interface CN1 , and the output end of the rectifier chip D3 is connected to the overvoltage protection module 2 .

[0050] 2. Overvoltage protection module 2

[0051] like Figure 3 As shown, in this embodiment, the overvoltage protection module 2 includes a first switch tube Q1, wherein:

[0052] When the DC power output by the rectifier module 1 exceeds the preset voltage range, the first switch tube Q1 is turned off to prohibit the overvoltage protection module 2 from outputting the DC power to the channel identification switching module 4;

[0053] When the DC power output by the rectifier module 1 is within a preset voltage range, the first switch tube Q1 is turned on, so that the overvoltage protection module 2 outputs the DC power to the channel identification and switching module 4 .

[0054] like Figure 4 As shown, in this embodiment, the overvoltage protection module 2 includes a fourth voltage stabilizing diode D4, a first switch tube Q1 and a third switch tube Q3, wherein:

[0055] When the DC power output by the rectifier module 1 exceeds the preset voltage range, the fourth voltage regulator diode D4 is turned on, the third switch tube Q3 is turned on, and the first switch tube Q1 is turned off, so as to prohibit the overvoltage protection module 2 from outputting the DC power to the channel identification switching module 4;

[0056] When the DC power output by the rectifier module 1 is within a preset voltage range, the fourth voltage regulator diode D4 is turned off, the third switch tube Q3 is turned off, and the first switch tube Q1 is turned on, so that the overvoltage protection module 2 outputs the DC power to the channel identification switching module 4.

[0057] like Figure 2 As shown, in this embodiment, the overvoltage protection module 2 includes a second resistor R2, a third resistor R3, a sixth resistor R6, a ninth resistor R9, a first voltage zener diode ZD2, a fourth voltage zener diode D4, a first switch tube Q1 and a third switch tube Q3;

[0058] The anode of the fourth voltage stabilizing diode D4 is grounded, and the cathode is connected to the output end of the rectifier module 1 through the second resistor R2;

[0059] The anode of the first voltage zener diode ZD2 is connected to the cathode of the fourth voltage zener diode D4 through the sixth resistor R6, and the cathode of the first voltage zener diode ZD2 is connected to the output end of the rectifier module 1;

[0060] The base of the third switch tube Q3 is connected to the anode of the first voltage stabilizing diode ZD2, the emitter is connected to the output end of the rectifier module 1, and the collector is grounded through the ninth resistor R9;

[0061] The source of the first switch tube Q1 is connected to the output end of the rectifier module 1 , the gate is grounded through the ninth resistor R9 , and the drain is connected to the input end of the channel identification switching module 4 .

[0062] For example, the preset voltage range is 0 to 51V. When the DC power output by the rectifier module 1 exceeds 51V, the fourth voltage zener diode D4 is turned on, the third switch tube Q3 is turned on, and the first switch tube Q1 is turned off. The DC power cannot be output to the subsequent stage, thereby providing overvoltage protection for the subsequent circuit. Conversely, when the DC power output by the rectifier module 1 does not exceed 51V, the fourth voltage zener diode D4 is turned off, the third switch tube Q3 is turned off, and the first switch tube Q1 has a voltage difference due to the voltage division between the third resistor R3 and the ninth resistor R9. The first switch tube Q1 is turned on to supply power to the subsequent stage.

[0063] 3. Voltage stabilization module 3

[0064] like Figure 2 As shown, in this embodiment, the voltage stabilizing module 3 includes a voltage stabilizing chip U2, an eleventh capacitor C11 and a twelfth capacitor C12, wherein:

[0065] The input end of the voltage stabilizing chip U2 is connected to a battery so that the battery supplies power to the voltage stabilizing chip U2. The output end of the voltage stabilizing chip U2 is connected to the channel identification switching module 4 so as to output a reference voltage to the channel identification switching module 4. The ground end of the voltage stabilizing chip U2 is grounded.

[0066] One end of the eleventh capacitor C11 is connected to the battery, and the other end is grounded;

[0067] One end of the twelfth capacitor C12 is connected to the battery, and the other end is grounded.

[0068] When working, the battery supplies power to the voltage stabilizing chip U2. At the same time, the voltage stabilizing chip U2 can convert the battery voltage into 3V and output it to the channel identification switching module 4.

[0069] 4. Channel identification switching module 4

[0070] like Figure 5 As shown, in this embodiment, the channel identification switching module 4 includes a comparator U4, a second switch tube Q2, a fourth switch tube Q4, and a fifth switch tube Q5; the comparator U4 compares the DC power supply with the reference voltage, wherein:

[0071] When the DC power supply is greater than the reference voltage, the second switch tube Q2 is turned off to prohibit the DC power supply output by the overvoltage protection module 2 from being directly input into the low-voltage channel module 6, and at the same time, the fourth switch tube Q4 and the fifth switch tube Q5 are turned on, so that the DC power supply output by the overvoltage protection module 2 is sequentially stepped down through the high-voltage channel module 5 and the low-voltage channel module 6;

[0072] When the DC power supply is less than or equal to the reference voltage, the second switch tube Q2 is turned on to allow the DC power supply output by the overvoltage protection module 2 to undergo a first-level voltage reduction through the low-voltage channel module 6, and at the same time the fourth switch tube Q4 and the fifth switch tube Q5 are turned off to prohibit the DC power supply output by the overvoltage protection module 2 from being input into the high-voltage channel module 5.

[0073] like Figure 6 As shown, in this embodiment, the channel identification switching module 4 includes a comparator U4, a first voltage-dividing resistor group M1, a second voltage-dividing resistor group M2, a second switch tube Q2, a fourth switch tube Q4, a fifth switch tube Q5, a sixth switch tube Q6 and a seventh switch tube Q7; the first voltage-dividing resistor group M1 divides the reference voltage output by the voltage stabilizing module 3, and sends the divided voltage to the comparator U4; the second voltage-dividing resistor group M2 divides the DC power output by the overvoltage protection module 2, and sends the divided real-time power to the comparator U4; the comparator U4 compares the real-time power with the divided voltage, wherein:

[0074] When the real-time power supply is greater than the divided voltage, the seventh switch tube Q7 is turned on, the sixth switch tube Q6 is turned off, the second switch tube Q2 is turned off, and the fifth switch tube Q5 is turned on and supplies power to the high-voltage channel module 5, while the fourth switch tube Q4 is turned on and supplies power to the low-voltage channel module 6, so that the DC power output by the overvoltage protection module 2 is sequentially stepped down through the high-voltage channel module 5 and the low-voltage channel module 6;

[0075] When the real-time power supply is less than or equal to the divided voltage, the seventh switch tube Q7 is turned off, the fourth switch tube Q4 is turned off, the fifth switch tube Q5 is turned off, the sixth switch tube Q6 is turned on, and the second switch tube Q2 is turned on and supplies power to the low-voltage channel module 6, so that the DC power output by the overvoltage protection module 2 is subjected to a first-level voltage reduction through the low-voltage channel module 6.

[0076] like Figure 2 As shown, in this embodiment, the channel identification switching module 4 includes a comparator U4, a first voltage-dividing resistor group M1, a second voltage-dividing resistor group M2, a third voltage-dividing resistor group M3, a second switch tube Q2, a fourth switch tube Q4, a fifth switch tube Q5, a sixth switch tube Q6 and a seventh switch tube Q7;

[0077] The voltage stabilizing module 3 is connected to the comparator U4 through the first voltage-dividing resistor group M1, the overvoltage protection module 2 is connected to the comparator U4 through the second voltage-dividing resistor group M2, and the overvoltage protection module 2 is also connected to the sixth switch tube Q6 through the third voltage-dividing resistor group M3; accordingly, the first voltage-dividing resistor group M1 includes a fifteenth resistor R15 and a twentieth resistor R20 connected in series, and the voltage dividing point of the first voltage-dividing resistor group is between the fifteenth resistor R15 and the twentieth resistor R20; the second voltage-dividing resistor group M2 includes a fourteenth resistor R14 and a nineteenth resistor R19 connected in series, and the voltage dividing point of the second voltage-dividing resistor group is between the fourteenth resistor R14 and the nineteenth resistor R19; the third voltage-dividing resistor group M3 includes a tenth resistor R10 and a twelfth resistor R12 connected in series, and the voltage dividing point of the third voltage-dividing resistor group is between the tenth resistor R10 and the twelfth resistor R12;

[0078] The inverting input terminal of the comparator U4 is connected to the voltage dividing point of the first voltage dividing resistor group M1, the non-inverting input terminal is connected to the voltage dividing point of the second voltage dividing resistor group M2, the output terminal is connected to the base of the seventh switch tube Q7, and the emitter of the seventh switch tube Q7 is grounded;

[0079] The gate of the sixth switch tube Q6 is respectively connected to the voltage dividing point of the third voltage dividing resistor group M3, the drain of the fourth switch tube Q4 and the drain of the fifth switch tube Q5, the source of the sixth switch tube Q6 is grounded, and the drain of the sixth switch tube Q6 is connected to the gate of the second switch tube Q2;

[0080] The source of the second switch tube Q2 is connected to the output end of the overvoltage protection module 2, and the drain is connected to the input end of the low-voltage channel module 6;

[0081] The source of the fourth switch tube Q4 is connected to the output end of the high-voltage channel module 5, and the drain is connected to the input end of the low-voltage channel module 6;

[0082] The source of the fifth switch tube Q5 is connected to the output end of the overvoltage protection module 2 , and the drain is connected to the input end of the high-voltage channel module 5 .

[0083] Further, the channel identification switching module 4 also includes a fourth voltage-dividing resistor group M4, a first resistor R1, a seventh resistor R7, a first diode D1, a second diode D2, a fifth diode D5 and a sixth diode D6; the gate of the second switch tube Q2 is connected to the drain of the sixth switch tube Q6 through the first resistor R1 and the first diode D1 in sequence, and the drain of the second switch tube Q2 is connected to the drain of the fourth switch tube Q4; the source of the fourth switch tube Q4 is connected to the anode of the fifth diode D5 through the seventh resistor R7, the gate of the fourth switch tube Q4 is connected to the anode of the fifth diode D5, and the cathode of the fifth diode D5 is connected to the gate of the sixth switch tube Q6; the anode of the sixth diode D6 is connected to the gate of the fifth switch tube Q5 and is connected to the source of the fifth switch tube Q5 through the tenth resistor R10, and the cathode of the sixth diode D6 is connected to the gate of the sixth switch tube Q6;

[0084] Among them, the current direction can be effectively controlled by the first diode D1, the second diode D2, the fifth diode D5 and the sixth diode D6 to avoid current backflow; the fourth voltage-dividing resistor group M4 includes a thirteenth resistor R13 and an eighteenth resistor R18 connected in series, and the voltage dividing point of the fourth voltage-dividing resistor group is between the thirteenth resistor R13 and the eighteenth resistor R18; at the same time, the first resistor R1 and the seventh resistor R7 have the same function as the tenth resistor R10, and are all used for voltage division.

[0085] It should be noted that the first voltage-dividing resistor group M1 provides a divided voltage for the negative electrode of the comparator U4 = 3V / (R15+R20)×R20=0.75V; the DC power output by the overvoltage protection module 2 is divided by the second voltage-dividing resistor group M2 and compared with the divided voltage (0.75V) at the inverting input terminal of the comparator U4, wherein:

[0086] When the real-time power supply is greater than the divided voltage, the comparator U4 is an open-drain output, and after the voltage is divided by the fourth voltage-dividing resistor group M4, the seventh switch tube Q7 is turned on, the second switch tube Q2 and the sixth switch tube Q6 are turned off, and the fifth switch tube Q5 is turned on; after the fifth switch tube Q5 is turned on, power is supplied to the high-voltage channel module 5, and a 12V voltage is output; similarly, because the seventh switch tube Q7 is turned on, the fourth switch tube Q4 is also turned on, and the low-voltage channel module 6 starts to work and outputs a 5V voltage;

[0087] When the real-time power supply is less than or equal to the divided voltage, the comparator U4 outputs a low level, the seventh switch tube Q7 is turned off, the fourth switch tube Q4, and the fifth switch tube Q5 are turned off. Due to the presence of the third voltage-dividing resistor group M3 and the sixth diode, the sixth switch tube Q6 is turned on, and the second switch tube Q2 is turned on. Due to the presence of the second diode D2, the input will not flow back to 12V, the low-voltage channel module 6 starts working, and the high-voltage channel module 5 stops working.

[0088] 5. High voltage channel module 5

[0089] like Figure 7 As shown, in this embodiment, the high-voltage channel module 5 includes a third step-down chip U3, a second inductor L2, a seventh diode D7, a first polarity capacitor CE1, a second polarity capacitor CE2, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh resistor C11, and a fifth voltage-dividing resistor group M5, wherein:

[0090] The ground pin GND of the third step-down chip U3 is grounded; the feedback pin FB is connected to the voltage dividing point of the fifth voltage dividing resistor group M5, so as to adjust the output voltage by detecting the output voltage through the voltage dividing network of the fifth voltage dividing resistor group M5; the current detection negative terminal pin CSN is connected to the input end of the low voltage channel module 6; the power switch output pin SW is connected to the input end of the low voltage channel module 6 through the second inductor L2 and the eleventh resistor R11 in sequence; the current detection positive terminal pin CSP is connected to the input end of the low voltage channel module 6 through the eleventh resistor R11; the bypass capacitor pin VC is connected to the output end of the channel identification switching module 4 through the eighth capacitor C8; the power input pin VIN is connected to the output end of the channel identification switching module 4;

[0091] The anode of the seventh diode D7 is grounded, and the cathode is connected to the power switch output pin SW;

[0092] One end of the second polarity capacitor CE2 is connected to the output end of the channel identification switching module 4, and the other end is grounded;

[0093] One end of the seventh capacitor C7 is connected to the output end of the channel identification switching module 4, and the other end is grounded;

[0094] One end of the first polarity capacitor CE1 is connected to the input end of the low voltage channel module 6, and the other end is grounded;

[0095] One end of the ninth capacitor C9 is connected to the input end of the low voltage channel module 6, and the other end is grounded;

[0096] One end of the tenth capacitor C10 is connected to the input end of the low-voltage channel module 6, and the other end is connected to the voltage dividing point of the fifth voltage dividing resistor group M5;

[0097] One end of the fifth voltage-dividing resistor group M5 is connected to the input end of the low-voltage channel module 6, and the other end is grounded. Accordingly, the fifth voltage-dividing resistor group M5 includes a sixteenth resistor R16 and a seventeenth resistor R17 connected in series, and a voltage-dividing point of the fifth voltage-dividing resistor group M5 is between the sixteenth resistor R16 and the seventeenth resistor R17.

[0098] 6. Low-pressure channel module 6

[0099] like Figure 8As shown, in this embodiment, the low-voltage channel module 6 includes a first step-down chip U1, a first inductor L1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a fourth resistor C7 and a sixth voltage-dividing resistor group M6, wherein:

[0100] The self-test pin BS of the first buck chip U1 is connected to the input end of the charging management module 7 and the load interaction module 8 through the second capacitor C2 and the first inductor L1 in turn; the ground pin GND is grounded; the output feedback pin FB is connected to the voltage dividing point of the sixth voltage dividing resistor group M6; the control pin EN is connected to the output end of the channel identification switching module 4 through the fourth resistor R4; the input pin IN is connected to the output end of the channel identification switching module 4; the inductor pin LX is connected to the input end of the charging management module 7 and the load interaction module 8 through the first inductor L1;

[0101] One end of the first capacitor C1 is connected to the input end of the charging management module 7 and the load interaction module 8, and the other end is grounded;

[0102] One end of the fourth capacitor C4 is connected to the input end of the charging management module 7 and the load interaction module 8, and the other end is grounded;

[0103] One end of the sixth capacitor C6 is connected to the input end of the charging management module 7 and the load interaction module 8, and the other end is grounded;

[0104] One end of the third capacitor C3 is connected to the output end of the channel identification switching module 4, and the other end is grounded;

[0105] One end of the fifth capacitor C5 is connected to the output end of the channel identification switching module 4, and the other end is grounded;

[0106] One end of the sixth voltage-dividing resistor group M6 is connected to the input end of the charging management module 7 and the load interaction module 8, and the other end is grounded. Accordingly, the sixth voltage-dividing resistor group M6 includes a fifth resistor R5 and an eighth resistor R8 connected in series, and the voltage dividing point of the sixth voltage-dividing resistor group M6 is between the fifth resistor R5 and the eighth resistor R8.

[0107] Therefore, under high flow conditions, the high-pressure channel module and the low-pressure channel module are turned on at the same time, and the DC power supply is first reduced in pressure through the high-pressure channel module, and then reduced in pressure for the second time through the low-pressure channel module, thereby realizing the secondary pressure reduction of the DC power supply; under low flow conditions, the high-pressure channel module is cut off and the low-pressure channel module is turned on, and the DC power supply is directly reduced in pressure through the low-pressure channel module.

[0108] 7. Charging management module 7

[0109] like Fig. 9As shown, in this embodiment, the charging management module 7 includes a charging chip U5, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a first light-emitting diode LED1, a second light-emitting diode LED2, a thirteenth capacitor C13, a fourteenth capacitor C14, a fifteenth capacitor C15 and a sixteenth capacitor C16;

[0110] The temperature detection pin TEMMP of the charging management module 7 is grounded, the current monitoring pin PROG is grounded through the twenty-first resistor R21, the ground pin GND is grounded, the voltage positive input pin VCC is connected to the output end of the low-voltage channel module 6 and is grounded through the fifteenth capacitor C15 and the sixteenth capacitor C16 respectively, the battery connection pin BAT is connected to the battery and is grounded through the thirteenth capacitor C13 and the fourteenth capacitor C14 respectively, the battery charging indication pin STDBY is connected to the output end of the low-voltage channel module 6 through the second light-emitting diode LED2 and the twenty-third resistor R23 in sequence, the charging status indication pin CEORG is connected to the output end of the low-voltage channel module 6 through the first light-emitting diode LED1 and the twenty-second resistor R22 in sequence, and the enable input pin CE is connected to the output end of the low-voltage channel module 6.

[0111] 8. Load interaction module 8

[0112] like Fig.10 As shown, in this embodiment, the load interaction module 8 includes a ninth diode D9, an eighth bipolar TVS tube D8, a tenth bipolar TVS tube D10 and an interaction port CN2, wherein:

[0113] The anode of the ninth diode D9 is connected to the output end of the low-voltage channel module 6, and the cathode is connected to the interactive port CN2;

[0114] One end of the eighth bipolar TVS tube D8 is connected to the cathode connection interactive port CN2, and the other end is grounded;

[0115] One end of the tenth bipolar TVS tube D10 is respectively connected to the interactive port CN2 and the battery, and the other end is grounded.

[0116] As can be seen from the above, the output circuit of the hydroelectric generator of the present invention monitors the real-time input DC power supply by introducing a channel identification switching module 4, thereby specifically controlling the conduction state of the high-voltage channel module 5 and the low-voltage channel module 6 to achieve secondary or primary voltage reduction of the DC power supply.

[0117] Combined Figure 11 to Figure 13 It can be seen that in the prior art, the power conversion efficiency of the hydroelectric generator is 80% under high flow conditions, and is 75% under low flow conditions (see Fig.11); After applying the output circuit of the hydroelectric generator of the present invention, the power conversion efficiency of the high-pressure channel module 5 is 90% under high flow conditions of the hydroelectric generator (see Fig.12 ), while in the case of low flow, the power conversion efficiency of the low pressure channel module 6 is 95% (see Fig.13 ); therefore, after adopting the output circuit of the hydroelectric generator of the present invention, the efficiency of the hydroelectric generator can be improved by 10% (90%-80%=10%) under high flow conditions, and by 20% (95%-75%=20%) under low flow conditions. The average efficiency of the entire solution is 92.5% (i.e. (95%+90%) / 2=92.5%), while the average efficiency of the technology before improvement is 77.5% (i.e. (80%+75%) / 2=77.5%), so the efficiency is improved by 15% on average relative to the technology before improvement (92.5%-77.5%=15%).

[0118] See also Fig.14 , Fig.14 The structure diagram of an embodiment of the shower of the present invention is shown, which includes a shower body 101, a battery 102, a hydroelectric generator 103 and a hydroelectric generator output circuit 100; wherein the battery 102, the hydroelectric generator 103 and the hydroelectric generator output circuit 100 are all arranged in the shower body 101, the hydroelectric generator 103 is connected to the rectifier module 1 of the hydroelectric generator output circuit 100, and the battery 102 is respectively connected to the voltage stabilizing module 3, the charging management module 7 and the load interaction module 8 of the hydroelectric generator output circuit 100.

[0119] Therefore, the shower of the present invention introduces a unique hydroelectric generator output circuit 100, which can monitor the real-time input DC power supply and specifically control the conduction state of the high-voltage channel module and the low-voltage channel module, thereby effectively improving the power conversion efficiency.

[0120] See also Fig.15 , Fig.15 The flowchart of an embodiment of the electric energy conversion method based on the output circuit of the hydroelectric generator of the present invention is shown, which includes:

[0121] S101, rectifying the AC power output by the hydroelectric generator into a DC power;

[0122] Specifically, the rectifier module 1 (see Figure 2 )Rectifies the AC power output by the hydroelectric generator into DC power.

[0123] S102, comparing the DC power supply with a preset voltage range, and outputting the DC power supply when the DC power supply is within the preset voltage range;

[0124] It should be noted that when the DC power supply exceeds the preset voltage range, the overvoltage protection module 2 is prohibited from outputting DC power to the channel identification switching module 4; when the DC power supply output by the rectifier module 1 is within the preset voltage range, the overvoltage protection module 2 outputs DC power to the channel identification switching module 4.

[0125] S103, determining whether the DC power supply is greater than a reference voltage;

[0126] Further, the step of determining whether the DC power supply is greater than the reference voltage includes:

[0127] (1) Perform voltage division processing on the DC power supply to output real-time power supply;

[0128] (2) performing voltage division processing on the reference voltage to output a divided voltage;

[0129] (3) Compare the real-time power supply with the divided voltage to determine whether the DC power supply is greater than the reference voltage.

[0130] When the real-time power supply is greater than the divided voltage, it means that the DC power supply is greater than the reference voltage; when the real-time power supply is less than or equal to the divided voltage, it means that the DC power supply is less than or equal to the reference voltage.

[0131] S104, when the DC power supply is less than or equal to the reference voltage, the high-voltage channel module is disconnected and the low-voltage channel module is turned on, so as to perform a first-stage voltage reduction on the DC power supply through the low-voltage channel module;

[0132] In the case of low flow, the high-pressure channel module is cut off, the low-pressure channel module is turned on, and the DC power supply is directly reduced in one level through the low-pressure channel module.

[0133] S105, when the DC power supply is greater than the reference voltage, the high-voltage channel module and the low-voltage channel module are turned on to perform secondary voltage reduction on the DC power supply through the high-voltage channel module and the low-voltage channel module in sequence;

[0134] Under high flow conditions, the high-pressure channel module and the low-pressure channel module are turned on at the same time. The DC power supply is first reduced in pressure through the high-pressure channel module, and then reduced in pressure for the second time through the low-pressure channel module, thereby achieving secondary pressure reduction of the DC power supply.

[0135] S106, the low-voltage channel module supplies power to the battery and the load.

[0136] Therefore, the shower of the present invention uses a dual-channel input identification and switching method to automatically select different conversion channels according to different generator input voltages, thereby improving the conversion efficiency under high voltage difference.

[0137] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A hydroelectric generator output circuit for a shower, characterized in that: It includes a rectifier module, an overvoltage protection module, a voltage stabilization module, a channel identification and switching module, a high-voltage channel module, a low-voltage channel module, a charging management module and a load interaction module; The rectifier module is connected to the hydroelectric generator and is used to rectify the AC power output by the hydroelectric generator into a DC power supply; The overvoltage protection module is connected to the rectifier module and is used to detect the DC power supply to output a DC power supply within a preset voltage range; The voltage stabilizing module is connected to the channel identification and switching module, and is used to output a reference voltage to the channel identification and switching module; The channel identification and switching module is connected to the overvoltage protection module, and is used to control the on / off states of the high-voltage channel module and the low-voltage channel module respectively according to the reference voltage and the DC power supply output by the overvoltage protection module; The low-voltage channel module is connected to the charging management module and the load interaction module respectively, and is used to supply power to the charging management module and the load interaction module.

2. The output circuit of the hydroelectric generator for shower as claimed in claim 1, characterized in that: The channel identification and switching module includes a comparator, a second switch tube, a fourth switch tube, and a fifth switch tube; The comparator compares the DC power supply with a reference voltage, wherein: When the DC power supply is greater than the reference voltage, the second switch tube is turned off to prohibit the DC power supply output by the overvoltage protection module from being directly input into the low-voltage channel module, and at the same time, the fourth switch tube and the fifth switch tube are turned on to allow the DC power supply output by the overvoltage protection module to be stepped down in two stages through the high-voltage channel module and the low-voltage channel module in turn. When the DC power supply is less than or equal to the reference voltage, the second switch tube is turned on to allow the DC power supply output by the overvoltage protection module to undergo a first-level voltage reduction through the low-voltage channel module, and at the same time, the fourth switch tube and the fifth switch tube are turned off to prohibit the DC power supply output by the overvoltage protection module from being input into the high-voltage channel module.

3. The output circuit of the hydroelectric generator for shower as claimed in claim 1, characterized in that: The channel identification and switching module includes a comparator, a first voltage-dividing resistor group, a second voltage-dividing resistor group, a second switch tube, a fourth switch tube, a fifth switch tube, a sixth switch tube and a seventh switch tube; The first voltage-dividing resistor group performs voltage-dividing processing on the reference voltage output by the voltage-stabilizing module, and sends the divided voltage to the comparator; The second voltage-dividing resistor group performs voltage-dividing processing on the DC power output by the overvoltage protection module, and sends the divided real-time power to the comparator; The comparator compares the real-time power supply with the divided voltage, wherein: When the real-time power supply is greater than the divided voltage, the seventh switch tube is turned on, the sixth switch tube is turned off, the second switch tube is turned off, and the fifth switch tube is turned on and supplies power to the high-voltage channel module, while the fourth switch tube is turned on and supplies power to the low-voltage channel module, so that the DC power output by the overvoltage protection module is sequentially stepped down through the high-voltage channel module and the low-voltage channel module. When the real-time power supply is less than or equal to the divided voltage, the seventh switch tube is turned off, the fourth switch tube is turned off, the fifth switch tube is turned off, the sixth switch tube is turned on, and the second switch tube is turned on and supplies power to the low-voltage channel module, so that the DC power output by the overvoltage protection module is subjected to a first-level voltage reduction through the low-voltage channel module.

4. The output circuit of the hydroelectric generator for shower as claimed in claim 1, characterized in that: The channel identification and switching module includes a comparator, a first voltage-dividing resistor group, a second voltage-dividing resistor group, a third voltage-dividing resistor group, a second switch tube, a fourth switch tube, a fifth switch tube, a sixth switch tube and a seventh switch tube; The voltage stabilizing module is connected to the comparator through the first voltage-dividing resistor group, the overvoltage protection module is connected to the comparator through the second voltage-dividing resistor group, and the overvoltage protection module is also connected to the sixth switch tube through the third voltage-dividing resistor group; The inverting input terminal of the comparator is connected to the voltage dividing point of the first voltage dividing resistor group, the non-inverting input terminal is connected to the voltage dividing point of the second voltage dividing resistor group, the output terminal is connected to the base of the seventh switch tube, and the emitter of the seventh switch tube is grounded; The gate of the sixth switch tube is respectively connected to the voltage dividing point of the third voltage dividing resistor group, the drain of the fourth switch tube and the drain of the fifth switch tube, the source of the sixth switch tube is grounded, and the drain of the sixth switch tube is connected to the gate of the second switch tube; The source of the second switch tube is connected to the output end of the overvoltage protection module, and the drain is connected to the input end of the low-voltage channel module; The source of the fourth switch tube is connected to the output end of the high-voltage channel module, and the drain is connected to the input end of the low-voltage channel module; The source of the fifth switch tube is connected to the output end of the overvoltage protection module, and the drain is connected to the input end of the high-voltage channel module.

5. The output circuit of the hydroelectric generator for shower as claimed in claim 1, characterized in that: The overvoltage protection module includes a first switch tube; When the DC power output by the rectifier module exceeds a preset voltage range, the first switch tube is turned off to prohibit the overvoltage protection module from outputting the DC power to the channel identification switching module; When the DC power output by the rectifier module is within a preset voltage range, the first switch tube is turned on, so that the overvoltage protection module outputs the DC power to the channel identification and switching module.

6. The output circuit of the hydroelectric generator for shower as claimed in claim 1, characterized in that: The overvoltage protection module includes a fourth voltage stabilizing diode, a first switch tube and a third switch tube; When the DC power output by the rectifier module exceeds a preset voltage range, the fourth voltage regulator diode is turned on, the third switch tube is turned on, and the first switch tube is turned off, so as to prohibit the overvoltage protection module from outputting the DC power to the channel identification switching module; When the DC power output by the rectifier module is within a preset voltage range, the fourth voltage regulator diode is turned off, the third switch tube is turned off, and the first switch tube is turned on, so that the overvoltage protection module outputs the DC power to the channel identification switching module.

7. The output circuit of the hydroelectric generator for shower as claimed in claim 1, characterized in that: The overvoltage protection module includes a second resistor, a third resistor, a sixth resistor, a ninth resistor, a first voltage zener diode, a fourth voltage zener diode, a first switch tube and a third switch tube; The anode of the fourth voltage stabilizing diode is grounded, and the cathode is connected to the output end of the rectifier module through the second resistor; The anode of the first voltage stabilizing diode is connected to the cathode of the fourth voltage stabilizing diode through a sixth resistor, and the cathode of the first voltage stabilizing diode is connected to the output end of the rectifier module; The base of the third switch tube is connected to the anode of the first voltage regulator diode, the emitter is connected to the output end of the rectifier module, and the collector is grounded through the ninth resistor; The source of the first switch tube is connected to the output end of the rectifier module, the gate is grounded through the ninth resistor, and the drain is connected to the input end of the channel identification switching module.

8. A shower, characterized in that: The invention comprises a shower body, a battery, a hydroelectric generator and the hydroelectric generator output circuit as claimed in any one of claims 1 to 5, wherein the battery, the hydroelectric generator and the hydroelectric generator output circuit are all arranged in the shower body, the hydroelectric generator is connected to the rectifier module of the hydroelectric generator output circuit, and the battery is respectively connected to the voltage stabilizing module, the charging management module and the load interaction module of the hydroelectric generator output circuit.

9. A method for converting electric energy based on the output circuit of a hydroelectric generator according to any one of claims 1 to 7, characterized in that: include: Rectify the AC power output by the hydroelectric generator into DC power; Comparing the DC power supply with a preset voltage range, and outputting the DC power supply when the DC power supply is within the preset voltage range; determining whether the DC power supply is greater than the reference voltage, If the result is negative, the high-voltage channel module is disconnected and the low-voltage channel module is turned on, so as to perform a first-stage voltage reduction on the DC power supply through the low-voltage channel module. If the judgment is yes, the high-voltage channel module and the low-voltage channel module are turned on to perform secondary voltage reduction on the DC power supply through the high-voltage channel module and the low-voltage channel module in sequence; The low-voltage channel module supplies power to the battery and the load.

10. The method for converting electric energy of a hydroelectric generator for a shower as claimed in claim 9, characterized in that: The step of determining whether the DC power supply is greater than the reference voltage comprises: Performing voltage division processing on the DC power supply to output real-time power supply; Performing voltage division processing on the reference voltage to output a divided voltage; The real-time power supply is compared with the divided voltage to determine whether the DC power supply is greater than the reference voltage.

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