Solar water heater constant temperature intelligent valve control device

Abstract

The invention discloses a constant temperature intelligent valve control device for a solar water heater, comprising a control system, a power supply unit, a pipeline and a manual switch. The control system comprises a constant temperature intelligent valve controller, a temperature collection unit, a flow collection unit, a key input control unit and an automatic adjustment unit, which can make the outlet water temperature reach the set temperature, and can adjust in time according to the change of parameters during use to make the outlet water temperature constant, with fast adjustment speed and reduced waste of water resources. It also has the functions of preventing scalding and hypothermia, and can remind people of danger through digital flashing, thereby improving the user's comfort.

Description

Technical Field

[0001] The invention relates to the field of solar water heater control, and in particular to a constant temperature intelligent valve control device for a solar water heater. Background Art

[0002] In current homes, apartments, and hotels, hot water for showering, hand washing, and other uses is mostly provided by mechanical mixing valves. These valves require manual temperature adjustment during use, which is slow and easily leads to water waste. Furthermore, the water temperature is inconsistent, often overheating or overcooling, which can easily cause burns or chills, resulting in a poor user experience. Summary of the Invention

[0003] The invention provides a solar water heater constant temperature intelligent valve control device, which aims to solve the problems of existing solar water heaters having unstable outlet water temperature, which is easy to cause scalding or cold, and slow temperature adjustment speed, which causes water waste.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: including a control system, a power supply unit, a pipeline and a manual switch,

[0005] The power supply unit adopts a thermoelectric power supply, including a semiconductor thermoelectric power generation chip TEG, an AC boost resonant circuit, an ultra-low voltage boost conversion chip U2 and an energy storage supercapacitor. The chip U2 adopts a chip model LTC3108;

[0006] The control system includes a constant temperature intelligent valve controller, which uses a chip U1 of model AT89C52;

[0007] The temperature acquisition unit includes a hot water temperature sensor, a cold water temperature sensor, and an outlet water temperature sensor, which are used to collect water temperature signals at the hot water inlet, cold water inlet, and outlet water, respectively. The hot water temperature sensor, cold water temperature sensor, and outlet water temperature sensor are all connected to the chip U1 through wires.

[0008] The flow acquisition unit includes a hot water flow sensor, a cold water flow sensor, and an outlet flow sensor, which are used to collect water flow signals at the hot water inlet, cold water inlet, and outlet, respectively. The hot water flow sensor, cold water flow sensor, and outlet flow sensor are all connected to the chip U1 through wires.

[0009] A key input control unit includes a mode selection button S1 and a temperature setting controller. The mode selection button S1 is used to select the control system to operate in hot water mode, cold water mode, and warm water mode. The temperature setting controller is used to set the water temperature. The temperature setting controller includes a confirmation button S2, a temperature increase button S3, and a temperature decrease button S4. One end of the mode selection button S1, the confirmation button S2, the temperature increase button S3, and the temperature decrease button S4 are respectively connected to the seventh pin, the sixth pin, the fifth pin, and the fourth pin of the coding instruction chip U5. The other ends of the mode selection button S1, the confirmation button S2, the temperature increase button S3, and the temperature decrease button S4 are respectively connected to the Vout pin of the chip U2 through a resistor. The coding instruction chip U5 adopts a chip model 74LS148. The A0 and A1 pins of the coding instruction chip U5 are respectively connected to the P2.2 pin and the P2.3 pin of the chip U1;

[0010] An automatic adjustment unit, including a hot water automatic adjustment valve, a cold water automatic adjustment valve, and an outlet automatic water stop valve, wherein the outlet automatic water stop valve is provided at the water outlet and is electrically connected to the chip U1;

[0011] When the control system operates in hot water mode, the chip U1 controls the cold water automatic regulating valve to close, and controls the water flow rate of the hot water automatic regulating valve according to the water flow rate signal received at the water outlet;

[0012] When the control system operates in cold water mode, the chip U1 controls the hot water automatic regulating valve to close, and controls the water flow rate of the cold water automatic regulating valve according to the water flow rate signal received at the water outlet;

[0013] When the control system operates in warm water mode, the chip U1 adjusts the outlet flow of the hot water automatic regulating valve and the cold water automatic regulating valve in a timely manner according to the water temperature signals and water flow signals received at the hot water inlet, cold water inlet and outlet, so that the water temperature at the outlet reaches the set temperature and remains constant;

[0014] When the water flow signal received at the cold water inlet rapidly weakens, the chip U1 controls the hot water automatic regulating valve and the water outlet automatic water stop valve to close; when the chip U1 receives the closing signal of the manual switch, it controls the water outlet automatic water stop valve to open;

[0015] When the water flow signal received at the hot water inlet rapidly weakens, the chip U1 controls the cold water automatic regulating valve and the water outlet automatic stop valve to close; when the chip U1 receives the closing signal of the manual switch, it controls the water outlet automatic stop valve to open;

[0016] The pipeline is composed of a cold water pipeline, a hot water pipeline, and a water outlet pipeline, the power supply unit is connected to the pipeline, and the control system is connected to the pipeline;

[0017] The manual switch is used to open or close the water outlet valve and adjust the water outlet flow. The manual switch is in contact with the linkage switch S6. The linkage switch S6 is connected to the P3.3 pin of the chip U1. The linkage switch S6 is connected to the Vout pin of the chip U2.

[0018] Preferably, the control system further includes a power management unit, which includes a first analog switch and a second analog switch connected in parallel, the first analog switch adopts a 4016 chip U3, and the second analog switch adopts a 4016 chip U4, the power supply ends of the cold water temperature sensor, the cold water flow sensor, and the cold water automatic regulating valve are respectively connected to one end of the chip U3, the power supply ends of the hot water temperature sensor, the hot water flow sensor, and the hot water automatic regulating valve are respectively connected to one end of the chip U4, the other end of the chip U3 and the other end of the chip U4 are respectively connected to the Vout pin of the chip U2, and the control end of the chip U3 and the control end of U4 are respectively connected to the P1.7 pin and the P1.6 pin of the chip U1;

[0019] When the control system operates in hot water mode, the chip U1 controls the first analog switch to be disconnected.

[0020] When the control system operates in the cold water mode, the chip U1 controls the second analog switch to be disconnected.

[0021] Preferably, the control system is also provided with a low-power reset circuit, which is composed of a reset button S5 and an ultra-low power reset monitoring device. The ultra-low power reset monitoring device adopts a chip U6 with model MAX6347. The RESET pin of the chip U6 is connected to the reset input terminal RST of the chip U1, and the VCC pin of the chip U6 is connected to the reset button S5. The reset button S5 is connected to the Vout pin of the chip U2.

[0022] Preferably, the reset button S5 and the linkage switch S6 are both composite switches.

[0023] Preferably, the control system is further provided with a display unit, including a mode indicator, a set temperature display, and a water outlet temperature display, wherein the mode indicator is used to display the corresponding working mode of the control system through different green numbers, the set temperature display displays the set temperature with red numbers, and the water outlet temperature display displays the water temperature at the water outlet with blue numbers;

[0024] The chip U1 rapidly weakens the signal according to the water flow signal received at the cold water inlet, controls the red digits of the temperature display to flash, and rapidly weakens the signal according to the water flow signal received at the hot water inlet, controls the blue digits of the outlet water temperature display to flash;

[0025] The mode indicator, set temperature display, and outlet water temperature display all use LED digital tubes. The pins of the mode indicator, set temperature display, and outlet water temperature display are respectively connected to the corresponding pins of the chip U1 through a bus. The common end of the mode indicator is connected to the data output end Y0 pin of the decoder chip U7. The two common ends of the set temperature display are respectively connected to the Y1 pin and Y2 pin of the decoder chip U7. The two common ends of the outlet water temperature display are respectively connected to the Y3 pin and Y4 pin of the decoder chip U7. The select end EI of the decoder chip U7 is connected to the Vout pin of the chip U2. The decoder chip U7 uses a chip model 74LS138.

[0026] The corresponding data output end of the chip U1 is connected to the corresponding data input end of the address latch chip U8 through a bus. The address latch chip U8 adopts a chip model 74LS373. The latch enable end LE of the address latch chip U8 is connected to the address latch enable end ALE of the chip U1. The data output ends Q0, Q1, and Q2 pins of the address latch chip U8 are respectively connected to the input ends A, B, and C pins of the decoder chip U7.

[0027] Preferably, the hot water temperature sensor, the cold water temperature sensor, and the outlet water temperature sensor all use DS18B20 sensors, and the hot water flow sensor, the cold water flow sensor, and the outlet water flow sensor all use IA-UWM-2-GP30-DN20 sensors.

[0028] Preferably, the chips U3 and U4 are both 74HC4016 chips.

[0029] Preferably, the control system further includes a wireless sending unit for receiving the control signal sent by the chip U1 and sending it to the solar water heater controller, so that the solar water heater controller starts the automatic heating function. The wireless sending unit is electrically connected to the chip U1 through a bus, and the wireless sending unit is communicatively connected to the solar water heater controller.

[0030] Preferably, the wireless sending unit uses a chip with model number VT-CC1110 / 1110S-433.

[0031] The present invention provides a constant temperature intelligent valve control device for a solar water heater, which has the following beneficial effects:

[0032] (1) The present invention is provided with a temperature acquisition unit, a flow acquisition unit, a key input control unit, an automatic adjustment unit, and a display unit, which can make the outlet water temperature reach the set temperature, and can adjust the outlet water temperature in time according to the change of parameters during use, so that the outlet water temperature is constant, the adjustment speed is fast, and the waste of water resources is reduced. It also has the function of preventing scalding and hypothermia, and can remind people of danger through flashing numbers, thereby improving the user's comfort.

[0033] (2) An electricity management unit is set up. When the system works in hot water mode, the sensors and automatic regulating valves related to cold water stop working. When the system works in cold water mode, the sensors and automatic regulating valves related to hot water stop working, which greatly reduces the energy consumption of the system.

[0034] (3) Set up a low-power reset circuit to reduce system power consumption.

[0035] (4) A wireless transmission unit is provided to receive the control signal sent by the system and send it to the solar water heater controller, so that the solar water heater controller starts the automatic heating function, which is conducive to rapid adjustment of water temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the present invention.

[0037] Figure 2 It is the working flow chart of the control system of the present invention.

[0038] Figure 3 FIG. 1 is a circuit diagram of an embodiment of the present invention.

[0039] In the figure: 1 constant temperature intelligent valve controller, 2 temperature difference power generation power supply, 3 temperature acquisition unit, 4 flow acquisition unit, 5 key input control unit, 6 automatic adjustment unit, 7 pipeline, 8 power management unit, 9 low power reset circuit, 10 display unit, 11 wireless transmission unit, 12 solar water heater controller. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be clearly and completely described below in conjunction with embodiments.

[0041] like Figure 1 、 Figure 2 The solar water heater constant temperature intelligent valve control device includes a control system, a power supply unit, a pipeline and a manual switch. The control system includes a constant temperature intelligent valve controller 1, which adopts a chip U1 of model AT89C52. The pipeline consists of a cold water pipeline, a hot water pipeline and a water outlet pipeline.

[0042] The power supply unit adopts a thermoelectric power supply 2, including a semiconductor thermoelectric power generation chip TEG, an AC boost resonant circuit, an ultra-low voltage boost conversion chip U2 and an energy storage supercapacitor. The chip U2 adopts a chip model LTC3108. The two sides of the semiconductor thermoelectric power generation chip TEG are in contact with the cold water pipe and the hot water pipe respectively. The temperature difference between the cold and hot water in the cold and hot water pipes is converted into electrical energy. The semiconductor thermoelectric power generation chip TEG can adopt the power generation chip model SP1848-27145 produced by Shenzhen Shenmingyang Electronics Co., Ltd. The AC boost resonant circuit is composed of capacitor C1, the primary coil of the transformer, and the internal field effect transistor of the ultra-low voltage boost conversion chip U2. The low voltage generated by the semiconductor thermoelectric power generation chip TEG is converted into AC power and boosted through the AC boost resonant circuit, and is provided to the ultra-low voltage boost conversion chip U2 for rectification, outputting a stable +5V DC voltage and outputting it to the subsequent circuit through the Vout end of the chip U2. At the same time, the energy storage supercapacitor can be charged through the Vstore end of the chip U2.

[0043] The temperature acquisition unit 3 includes a hot water temperature sensor, a cold water temperature sensor, and an outlet water temperature sensor. The hot water temperature sensor, the cold water temperature sensor, and the outlet water temperature sensor are respectively arranged at the outlet end of the hot water pipe, the outlet end of the cold water pipe, and the inlet end of the outlet water pipe, and are used to collect water temperature signals at the hot water inlet, cold water inlet, and outlet of the solar water heater in turn. The hot water temperature sensor, the cold water temperature sensor, and the outlet water temperature sensor are all DS18B20 sensors produced by Dallas Semiconductor. The DQ pins of the hot water temperature sensor, the cold water temperature sensor, and the outlet water temperature sensor are all connected to the P2.0 pin of the chip U1, and the VCC pin of the automatic water stop valve of the outlet water is connected to the Vout end of the chip U2.

[0044] The flow acquisition unit 4 includes a hot water flow sensor, a cold water flow sensor, and an outlet flow sensor. The hot water flow sensor, the cold water flow sensor, and the outlet flow sensor are sequentially mounted on the outlet end of the hot water pipe, the outlet end of the cold water pipe, and the inlet end of the outlet pipe, and are used to collect water flow signals at the hot water inlet, the cold water inlet, and the outlet, respectively. The hot water flow sensor, the cold water flow sensor, and the outlet flow sensor all use the sensor model IA-UWM-2-GP30-DN20, manufactured by Jicheng Electronics. The D1 and D2 pins of the hot water flow sensor, the cold water flow sensor, and the outlet flow sensor are connected to the chip U1 through a bus.

[0045] The key input control unit 5 includes a mode selection button S1 and a temperature setting controller. The mode selection button S1 is used to select the control system to work in hot water mode, cold water mode, and warm water mode. The temperature setting controller is used to set the water temperature of the water. The temperature setting controller includes a confirmation button S2, a temperature increase button S3, and a temperature decrease button S4. When the control system works in warm water mode, the set temperature is increased by pressing the temperature increase button S3 and the set temperature is decreased by pressing the temperature decrease button S4. Finally, the confirmation button S2 needs to be pressed to complete the temperature increase or decrease instruction. One end of the mode selection button S1, the confirmation button S2, the temperature increase button S3, and the temperature decrease button S4 are respectively connected to the fourth pin, the third pin, the second pin, and the first pin of the coding instruction chip U5, and the other ends of the mode selection button S1, the confirmation button S2, the temperature increase button S3, and the temperature decrease button S4 are respectively connected to the fourth pin, the third pin, the second pin, and the first pin of the coding instruction chip U5. The resistor is connected to the Vout pin of chip U2. The encoding instruction chip U5 uses a chip model 74LS148. The A0 and A1 pins of the encoding instruction chip U5 are respectively connected to the P2.2 pin and P2.3 pin of the chip U1. The 10th, 11th, 12th and 13th pins of the encoding instruction chip U5 are all connected to the Vout pin of chip U2. The encoding output end GS pin of the encoding instruction chip U5 is connected to the P3.2 pin of the chip U1. The EI pin of the encoding instruction chip U5 is grounded. The mode selection button S1, the confirm button S2, the heating button S3 and the cooling button S4 are connected to the encoding instruction chip U5 according to their importance. As long as a key is pressed, a code will be generated, and the signal indicating that the code is valid is transmitted to the chip U1. The chip U1 determines the pressed button by reading the two-bit code, thereby completing the mode selection and temperature setting.

[0046] The automatic adjustment unit 6 includes a hot water automatic adjustment valve, a cold water automatic adjustment valve, and an outlet automatic water stop valve, all of which are controlled by a PWM-Controller. The outlet automatic water stop valve is arranged at the outlet end of the water outlet pipe, and the hot water automatic adjustment valve and the cold water automatic adjustment valve are respectively arranged at the outlet end of the hot water pipe and the outlet end of the cold water pipe. The hot water automatic adjustment valve, the cold water automatic adjustment valve, and the outlet automatic water stop valve are all electrically connected to the chip U1. The input ports IN1 and IN2 pins of the hot water automatic adjustment valve are respectively connected to the P1.0 pin and P1.1 pin of the chip U1, the IN1 and IN2 pins of the cold water automatic adjustment valve are respectively connected to the P1.2 pin and P1.3 pin of the chip U1, and the IN1 and IN2 pins of the outlet automatic water stop valve are respectively connected to the P1.4 pin and P1.5 pin of the chip U1.

[0047] When the control system works in hot water mode, chip U1 controls the cold water automatic regulating valve to close, and controls the water flow rate of the hot water automatic regulating valve according to the water flow signal at the water outlet detected by the water flow sensor, thereby controlling and stabilizing the hot water outflow;

[0048] When the control system works in cold water mode, chip U1 controls the hot water automatic regulating valve to close, and controls the water flow rate of the cold water automatic regulating valve according to the water flow signal at the water outlet detected by the water flow sensor, thereby controlling and stabilizing the cold water outflow;

[0049] When the control system works in warm water mode, the chip U1 adjusts the hot water automatic regulating valve and the cold water automatic regulating valve according to the water temperature signals received at the water inlet of the hot water pipe, the water inlet of the cold water pipe, and the water outlet of the water pipe, as well as the water flow signals at the water inlet of the hot water pipe, the water inlet of the cold water pipe, and the water outlet of the water pipe, controls the hot water output and the cold water output, and makes the water temperature at the water outlet reach the set temperature and keep it constant according to the received set temperature. At the same time, it can control in time. During use, if it is detected that the temperature and flow at the two hot water inlets and cold water inlets change, the control system will adjust the hot water automatic regulating valve and the cold water automatic regulating valve in time to adjust the flow to make the outlet water temperature constant.

[0050] When the control system is in warm water mode, it adopts a phased control strategy to reduce water consumption and ensure constant outlet water temperature:

[0051] The first stage control strategy is to quickly discharge the cold water close to the valve in the hot water pipeline, close the cold water automatic regulating valve, and fully open the hot water automatic regulating valve. When the hot water temperature detected by the hot water temperature sensor exceeds the set temperature, the second stage is entered;

[0052] The second stage is to mix the hot and cold water so that the outlet water temperature quickly reaches the set temperature. In this stage, a proportional control strategy is adopted, that is, the product of the temperature difference between the hot water temperature detected by the hot water temperature sensor and the set temperature and the hot water flow rate detected by the hot water flow rate sensor is equal to the product of the temperature difference between the set temperature and the cold water temperature and the cold water flow rate;

[0053] The control strategy for the third stage is constant temperature, which adopts fuzzy control strategy. When the temperature difference between the outlet water temperature and the set temperature is greater than 0.5℃, the positions of the hot water automatic regulating valve and the cold water automatic regulating valve are fine-tuned to make the temperature difference gradually approach 0.

[0054] When the water flow signal detected by the cold water flow sensor rapidly weakens, the system activates the anti-scalding protection function. The chip U1 controls the hot water automatic regulating valve and the water outlet automatic stop valve to close, and water no longer flows out to prevent the user from being scalded. When the chip U1 receives the closing signal of the manual switch, it controls the hot water automatic regulating valve and the water outlet automatic stop valve to open, which can prevent the occurrence of too high a temperature of hot water in the warm water mode.

[0055] When the hot water flow sensor detects that the water flow signal is rapidly weakening, the system activates the anti-thermal protection function. The chip U1 controls the cold water automatic adjustment valve and the water outlet automatic stop valve to close, and no water is discharged at this time. When the chip U1 receives the closing signal of the manual switch, it controls the cold water automatic adjustment valve and the water outlet automatic stop valve to open, which can prevent the appearance of cold water with too low a temperature in the warm water mode.

[0056] The manual switch is mechanically installed on the water outlet pipe. The manual switch is only used to adjust the size of the water outlet flow. The manual switch is in contact with the linkage switch S6. The linkage switch S6 adopts a composite switch. The linkage switch S6 is electrically connected to the chip U1. The linkage switch S6 is connected to the P3.3 pin of the chip U1. The linkage switch S6 is connected to the Vout pin of the chip U2. When the manual switch is closed, the manual switch is pressed tightly on the linkage switch S6, so that the Vout pin of the chip U2 is connected to the P3.3 pin of the chip U1, and the chip U1 receives the closing signal of the manual switch. When the manual switch is opened, one contact of the linkage switch S6 is grounded, so that the P3.3 pin of the chip U1 receives a negative pulse signal. At this time, the chip U1 can receive the opening signal of the manual switch, so that the control system enters the working state. When the manual switch is changed from open to closed, the control system will stop working.

[0057] Preferably, the control system further includes a power management unit 8, which includes a first analog switch and a second analog switch connected in parallel. The first analog switch uses a 4016 chip U3, and the second analog switch uses a 4016 chip U4. Both chip U3 and chip U4 use 74HC4016 chips.

[0058] The VCC pins of the cold water temperature sensor, cold water flow sensor, and cold water automatic regulating valve are respectively connected to one end of chip U3, and the other end of chip U3 is connected to the Vout pin of chip U2. The VCC pins of the hot water temperature sensor, hot water flow sensor, and hot water automatic regulating valve are respectively connected to one end of chip U4, and the other end of chip U4 is connected to the Vout pin of chip U2. The control end of chip U3 is connected to the P1.7 pin of chip U1, and the control end of chip U4 is connected to the P1.6 pin of chip U1.

[0059] When the control system operates in hot water mode, chip U1 outputs a control signal to chip U3, turning off the first analog switch, i.e., chip U3, so that the cold water temperature sensor, cold water flow sensor, and cold water automatic regulating valve are disconnected from the power supply and stop working, thereby reducing system power consumption;

[0060] When the control system works in cold water mode, chip U1 outputs a control signal to the second analog switch, namely chip U4, to disconnect the second analog switch, so that the hot water temperature sensor, hot water flow sensor, and hot water automatic regulating valve are disconnected from the power supply and stop working, thereby reducing system power consumption.

[0061] When the control system works in warm water mode, chip U3 is connected to the signals of the cold water temperature sensor, cold water flow sensor, and cold water automatic adjustment valve, and chip U4 is connected to the signals of the hot water temperature sensor, hot water flow sensor, and hot water automatic adjustment valve. All sensors and automatic adjustment valves are working.

[0062] Preferably, the control system also includes a low-power reset circuit 9, which is composed of a reset button S5 and an ultra-low power reset monitoring device. The ultra-low power reset monitoring device adopts a chip U6 with model MAX6347. The reset button S5 adopts a composite switch. The RESET pin of chip U6 is connected to the reset input terminal RST of chip U1, and the VCC pin of chip U6 is connected to the reset button S5. The reset button S5 is connected to the Vout pin of chip U2. Before the reset button S5 is pressed, the Vcc pin of chip U6 is connected to the Vout pin of chip U2. When the voltage on the Vcc end of chip U6 remains stable, the RESET pin of chip U6 will output a low level. After the reset button S5 is pressed, the Vcc pin of chip U6 is grounded and the input voltage is 0. After chip U6 monitors this voltage change, it will output a high level on its RESET pin. This high level is added to the reset input terminal RST of chip U1, causing the chip U1 to reset and enter the default warm water mode. The automatic water stop valve of the water outlet is also in the open state, and the control system works again.

[0063] Preferably, the control system is also provided with a display unit 10, including a mode indicator, a set temperature display, and a water outlet temperature display. The mode indicator is used to display the corresponding working mode of the control system through different green numbers. The hot water mode corresponds to the display "1", the warm water mode corresponds to the display "2", and the cold water mode corresponds to the display "3". The set temperature display displays the set temperature with red numbers, and the water outlet temperature display displays the water temperature at the water outlet with blue numbers. The mode indicator, the set temperature display, and the water outlet temperature display all use LED digital tubes. The mode indicator uses a 7SEG-COM-AN-GRN digital tube, the set temperature display uses a 7SEG-MPX2-CC digital tube, and the water outlet temperature display uses a 7SEG-MPX2-CC-BLUE digital tube.

[0064] The pins of the mode indicator, set temperature display, and outlet water temperature display are respectively connected to the P0.0 pin, P0.1 pin, P0.2 pin, P0.3 pin, P0.4 pin, P0.5 pin, P0.6 pin, and P0.7 pin of the chip U1 through the bus. The common end of the mode indicator is connected to the data output end Y0 pin of the decoder chip U7. The decoder chip U7 uses a chip model 74LS138. The two common ends of the set temperature display are respectively connected to the Y1 pin and Y2 pin of the decoder chip U7. The two common ends of the outlet water temperature display are respectively connected to the Y3 pin and Y4 pin of the decoder chip U7. The selection end E1 of the decoder chip U7 is connected to the Vout pin of the chip U2. The selection ends E2 and E3 of the decoder chip U7 are grounded.

[0065] The corresponding data output end of chip U1 is connected to the corresponding data input end of address latch chip U8 through a bus. Address latch chip U8 adopts chip model 74LS373. The P0.0 pin, P0.1 pin, P0.2 pin, P0.3 pin, P0.4 pin, P0.5 pin, P0.6 pin, and P0.7 pin of chip U1 are respectively connected to the D0 pin, D1 pin, D2 pin, D3 pin, D4 pin, D5 pin, D6 pin, and D7 pin of address latch chip U8. The latch enable end LE of address latch chip U8 is connected to the address latch enable end ALE of chip U1. The data output ends Q0, Q1, and Q2 pins of address latch chip U8 are respectively connected to the input ends A, B, and C pins of decoder chip U7.

[0066] When the cold water flow signal at the cold water inlet detected by the cold water flow sensor is rapidly weakened, the chip U1 sends a control signal to the set temperature display, and the two red numbers of the set temperature display flash at the same time to remind people to pay attention to the danger of scalding. When the hot water flow signal detected by the hot water flow sensor is rapidly weakened, the chip U1 sends a control signal to the outlet water temperature display, and controls the two blue numbers of the outlet water temperature display to flash at the same time to remind people to pay attention to the danger of cold water.

[0067] Preferably, the control system also includes a wireless sending unit 11, which is used to receive the control signal sent by the chip U1 and send it to the solar water heater controller 12, so that the solar water heater controller 12 starts the automatic heating function. The wireless sending unit 11 is electrically connected to the chip U1 through a bus, and the wireless sending unit 11 is communicatively connected to the solar water heater controller 12.

[0068] When the system is operating in warm water mode or hot water mode, it will calculate the current available hot water volume in a timely manner based on the value of the hot water flow sensor, and when the available time is less than the system's minimum default value, the wireless sending unit 11 will send a control signal to start the automatic heating function of the solar water heater. The wireless sending unit 11 uses a chip model VT-CC1110 / 1110S-433. The CSN pin of the VT-CC1110 / 1110S-433 chip is connected to the P2.1 pin of the chip U1, the D1 pin is connected to the P3.1 pin of the chip U1, and the D2 pin is connected to the P3.0 pin of the chip U1. The VCC pin of the VT-CC1110 / 1110S-433 chip is connected to one end of the chip U4. When the system is operating in cold water mode, the chip U1 will disconnect the second analog switch, thereby disconnecting the VT-CC1110 / 1110S-433 chip from the power supply and stopping it from working, thereby reducing system energy consumption.

[0069] like Figure 3 This is the working flow chart of the present invention. The system starts working and the working mode is selected. After selecting the hot water mode or the cold water mode, the manual switch is turned on. After selecting the warm water mode, the temperature is set and the manual switch is turned on. After use, the manual switch is turned off and the system stops working. If the automatic water stop valve is in the closed state, the automatic water stop valve is opened when the manual switch is closed.

[0070] During use after the manual switch is turned on, if the chip U1 detects that the parameters are abnormal, the system will enable the anti-scalding and anti-hyperthermia protection functions, and the numbers of the set temperature display and the water outlet temperature display will flash accordingly, and the automatic water stop valve will be closed, and the hot water automatic adjustment valve or the cold water automatic adjustment valve will also be closed. After the manual switch is turned off and the reset button S5 is pressed, the numbers of the set temperature display or the water outlet temperature display will stop flashing, and the corresponding temperature value will be displayed, and the automatic water stop valve will open; if the user wants to resume use, he needs to turn on the manual switch and adjust the flow rate. It can be used when the water outlet temperature is appropriate.

[0071] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A solar water heater constant temperature intelligent valve control device, comprising a control system, a power supply unit, a pipeline (7) and a manual switch, characterized in that: The power supply unit adopts a temperature difference power generation power supply (2), comprising a semiconductor temperature difference power generation chip TEG, an AC boost resonant circuit, an ultra-low voltage boost conversion chip U2 and an energy storage super capacitor, wherein the chip U2 adopts a chip model LTC3108; The control system comprises a constant temperature intelligent valve controller (1), which uses a chip U1 of model AT89C52; The temperature acquisition unit (3) comprises a hot water temperature sensor, a cold water temperature sensor and a water outlet temperature sensor, which are used to collect water temperature signals at the hot water inlet, the cold water inlet and the water outlet in turn, wherein the hot water temperature sensor, the cold water temperature sensor and the water outlet temperature sensor are all connected to the chip U1 via wires. The flow collection unit (4) comprises a hot water flow sensor, a cold water flow sensor, and a water outlet flow sensor, which are used to collect water flow signals at the hot water inlet, the cold water inlet, and the water outlet in turn. The hot water flow sensor, the cold water flow sensor, and the water outlet flow sensor are all connected to the chip U1 via wires. A key input control unit (5), comprising a mode selection key S1 and a temperature setting controller, wherein the mode selection key S1 is used to select the control system to work in a hot water mode, a cold water mode, or a warm water mode, and the temperature setting controller is used to set the water temperature, and the temperature setting controller comprises a confirmation key S2, a temperature increase key S3, and a temperature decrease key S4, wherein one end of the mode selection key S1, the confirmation key S2, the temperature increase key S3, and the temperature decrease key S4 are respectively connected to the seventh pin, the sixth pin, the fifth pin, and the fourth pin of the coding instruction chip U5, and the other end of the mode selection key S1, the confirmation key S2, the temperature increase key S3, and the temperature decrease key S4 are respectively connected to the Vout pin of the chip U2 via a resistor, wherein the coding instruction chip U5 adopts a chip of model 74LS148, and the A0 and A1 pins of the coding instruction chip U5 are respectively connected to the P2.2 pin and the P2.3 pin of the chip U1; An automatic adjustment unit (6), comprising a hot water automatic adjustment valve, a cold water automatic adjustment valve, and a water outlet automatic water stop valve, wherein the water outlet automatic water stop valve is arranged at the water outlet, and the hot water automatic adjustment valve, the cold water automatic adjustment valve, and the water outlet automatic water stop valve are all electrically connected to the chip U1; When the control system works in hot water mode, the chip U1 controls the cold water automatic regulating valve to close, and controls the water flow rate of the hot water automatic regulating valve according to the water flow rate signal received at the water outlet; When the control system works in the cold water mode, the chip U1 controls the hot water automatic regulating valve to close, and controls the water flow rate of the cold water automatic regulating valve according to the water flow rate signal received at the water outlet; When the control system works in warm water mode, the chip U1 timely adjusts the water flow rate of the hot water automatic regulating valve and the cold water automatic regulating valve according to the received water temperature signals at the hot water inlet, cold water inlet and outlet, as well as the water flow rate signals at the hot water inlet, cold water inlet and outlet, so that the water temperature at the outlet reaches the set temperature and remains constant; When the water flow signal received at the cold water inlet rapidly weakens, the chip U1 controls the hot water automatic regulating valve and the water outlet automatic water stop valve to close; when the chip U1 receives the closing signal of the manual switch, it controls the water outlet automatic water stop valve to open; When the water flow signal received at the hot water inlet rapidly weakens, the chip U1 controls the cold water automatic regulating valve and the water outlet automatic water stop valve to close; when the chip U1 receives the closing signal of the manual switch, it controls the water outlet automatic water stop valve to open; The pipeline (7) is composed of a cold water pipeline, a hot water pipeline, and a water outlet pipeline; the power supply unit is connected to the pipeline (7); and the control system is connected to the pipeline (7); The manual switch is used to open or close the water outlet valve and adjust the water outlet flow rate. The manual switch is in contact with the linkage switch S6. The linkage switch S6 is connected to the P3.3 pin of the chip U1. The linkage switch S6 is connected to the Vout pin of the chip U2. The control system further comprises a power management unit (8), the power management unit (8) comprising a first analog switch and a second analog switch connected in parallel, the first analog switch adopting a 4016 chip U3, the second analog switch adopting a 4016 chip U4, the power supply ends of the cold water temperature sensor, the cold water flow sensor and the cold water automatic regulating valve are respectively connected to one end of the chip U3, the power supply ends of the hot water temperature sensor, the hot water flow sensor and the hot water automatic regulating valve are respectively connected to one end of the chip U4, the other end of the chip U3 and the other end of the chip U4 are respectively connected to the Vout pin of the chip U2, and the control end of the chip U3 and the control end of the chip U4 are respectively connected to the P1.7 pin and the P1.6 pin of the chip U1; When the control system works in hot water mode, the chip U1 controls the first analog switch to be disconnected. When the control system works in the cold water mode, the chip U1 controls the second analog switch to be disconnected; The control system is further provided with a low-power reset circuit (9), which is composed of a reset button S5 and an ultra-low-power reset monitoring device. The ultra-low-power reset monitoring device adopts a chip U6 of model MAX6347. The RESET pin of the chip U6 is connected to the reset input terminal RST of the chip U1. The VCC pin of the chip U6 is connected to the reset button S5. The reset button S5 is connected to the Vout pin of the chip U2.

2. The solar water heater constant temperature intelligent valve control device as claimed in claim 1, characterized in that : The reset button S5 and the linkage switch S6 are both composite switches.

3. The solar water heater constant temperature intelligent valve control device according to claim 1, characterized in that: The control system is further provided with a display unit (10), comprising a mode indicator, a set temperature display, and a water outlet temperature display, wherein the mode indicator is used to display the corresponding working mode of the control system through different green numbers, the set temperature display displays the set temperature with red numbers, and the water outlet temperature display displays the water temperature at the water outlet with blue numbers; The chip U1 rapidly weakens the signal according to the water flow signal received at the cold water inlet, controls the red digits of the temperature display to flash, and rapidly weakens the signal according to the water flow signal received at the hot water inlet, controls the blue digits of the water outlet temperature display to flash; The mode indicator, set temperature display, and outlet water temperature display all use LED digital tubes. The pins of the mode indicator, set temperature display, and outlet water temperature display are respectively connected to the corresponding pins of the chip U1 through a bus. The common end of the mode indicator is connected to the data output end Y0 pin of the decoder chip U7. The two common ends of the set temperature display are respectively connected to the Y1 pin and the Y2 pin of the decoder chip U7. The two common ends of the outlet water temperature display are respectively connected to the Y3 pin and the Y4 pin of the decoder chip U7. The selection end EI of the decoder chip U7 is connected to the Vout pin of the chip U2. The decoder chip U7 uses a chip with model 74LS138; The corresponding data output end of the chip U1 is connected to the corresponding data input end of the address latch chip U8 through a bus. The address latch chip U8 adopts a chip model 74LS373. The latch enable end LE of the address latch chip U8 is connected to the address latch enable end ALE of the chip U1. The data output ends Q0, Q1, and Q2 pins of the address latch chip U8 are respectively connected to the input ends A, B, and C pins of the decoder chip U7.

4. The solar water heater constant temperature intelligent valve control device as claimed in claim 1, characterized in that :The hot water temperature sensor, cold water temperature sensor, and outlet water temperature sensor all use DS18B20 model sensors, and the hot water flow sensor, cold water flow sensor, and outlet water flow sensor all use IA-UWM-2-GP30-DN20 model sensors.

5. The solar water heater constant temperature intelligent valve control device as claimed in claim 1, characterized in that : The chips U3 and U4 both use 74HC4016 chips.

6. The solar water heater constant temperature intelligent valve control device as claimed in claim 1, characterized in that The control system further comprises a wireless transmission unit (11) for receiving a control signal transmitted by the chip U1 and transmitting the control signal to the solar water heater controller (12), so that the solar water heater controller (12) starts an automatic heating function. The wireless transmission unit (11) is electrically connected to the chip U1 via a bus, and the wireless transmission unit (11) is in communication connection with the solar water heater controller (12).

7. The solar water heater constant temperature intelligent valve control device as claimed in claim 6, characterized in that The wireless transmission unit (11) adopts a chip of model VT-CC1110 / 1110S-433.

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