阅读说明：本技术 太阳能热水器恒温智能阀门控制装置 (Constant temperature intelligent valve control device for solar water heater ) 是由 麦俊鹏 陈兵 常静 郭晓君 朱煜鈺 于 2020-06-22 设计创作，主要内容包括：本发明公开了太阳能热水器恒温智能阀门控制装置,包括控制系统、供电单元、管路和手动开关,控制系统包括恒温智能阀门控制器、温度采集单元、流量采集单元、按键输入控制单元、自动调整单元,可以使出水温度达到设定温度,且在使用过程中可以根据参数的变化适时调整,使出水温度恒定,调节速度快、减少水资源浪费,还具有防烫伤、防失温的功能,并可通过数字闪烁提醒人们注意危险,提高用户的使用舒适度。(The invention discloses a constant-temperature intelligent valve control device of a solar water heater, which comprises a control system, a power supply unit, a pipeline and a manual switch, wherein the control system comprises a constant-temperature intelligent valve controller, a temperature acquisition unit, a flow acquisition unit, a key input control unit and an automatic adjustment unit, can enable the temperature of outlet water to reach a set temperature, can be adjusted in time according to the change of parameters in the using process, enables the temperature of the outlet water to be constant, has high adjustment speed, reduces the waste of water resources, has the functions of preventing scalding and temperature loss, can remind people of paying attention to danger through digital flicker, and improves the using comfort of users.)

1. Solar water heater constant temperature intelligence valve controlling means, including control system, power supply unit, pipeline (7) and hand switch, its characterized in that:

the power supply unit adopts a temperature difference power generation power supply (2) and comprises a semiconductor temperature difference power generation sheet TEG, an alternating current boosting resonance circuit, an ultra-low voltage type boosting conversion chip U2 and an energy storage super capacitor, wherein the chip U2 adopts a chip with the type of LTC 3108;

the control system comprises a constant-temperature intelligent valve controller (1) and a chip U1 with the model number of AT89C 52;

the temperature acquisition unit (3) comprises a hot water temperature sensor, a cold water temperature sensor and a water outlet temperature sensor which are sequentially used for acquiring water temperature signals of a hot water inlet, a cold water inlet and a water outlet, the hot water temperature sensor, the cold water temperature sensor and the water outlet temperature sensor are all connected with the chip U1 through leads,

the flow acquisition unit (4) comprises a hot water flow sensor, a cold water flow sensor and a water outlet flow sensor which are sequentially used for acquiring water flow signals at a hot water inlet, a cold water inlet and a water outlet, the hot water flow sensor, the cold water flow sensor and the water outlet flow sensor are all connected with the chip U1 through leads,

a key input control unit (5) including a mode selection key S1 and a temperature setting controller, wherein the mode selection key S1 is used for selecting the control system to work in a hot water mode, a cold water mode and a warm water mode, the temperature setting controller is used for setting water temperature, the temperature setting controller includes a determination key S2, a temperature-raising key S3 and a temperature-lowering key S4, one end of the mode selection key S1, the determination key S2, the temperature-raising key S3 and the temperature-lowering key S4 are respectively connected with a seventh pin, a sixth pin, a fifth pin and a fourth pin of a coding command chip U5, the other end of the mode selection key S1, the determination key S2, the temperature-raising key S3 and the temperature-lowering key S4 are respectively connected with a pin Vout of the chip U2 through a resistor, the coding command chip U5 adopts a chip with the model 74LS148, pins A0 and A1 of the coding command chip U5 are respectively connected with a P2.2 pin of the chip 1, A P2.3 pin;

the automatic adjusting unit (6) comprises a hot water automatic adjusting valve, a cold water automatic adjusting valve and a water outlet automatic water stop valve, the water outlet automatic water stop valve is arranged at the water outlet, and the hot water automatic adjusting valve, the cold water automatic adjusting valve and the water outlet automatic water stop valve are all electrically connected with the chip U1;

when the control system works in a hot water mode, the chip U1 controls the cold water automatic regulating valve to be closed, and controls the water outlet flow of the hot water automatic regulating valve according to the received water flow signal at the water outlet;

when the control system works in a cold water mode, the chip U1 controls the hot water automatic regulating valve to be closed, and controls the water outlet flow of the cold water automatic regulating valve according to the received water flow signal at the water outlet;

when the control system works in a warm water mode, the chip U1 timely adjusts the water outlet flow 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, the cold water inlet and the water outlet and the water flow signals at the hot water inlet, the cold water inlet and the water outlet, so that the water temperature at the water outlet reaches the set temperature and keeps constant;

when the received water flow signal at the cold water inlet is rapidly weakened, the chip U1 controls the hot water automatic regulating valve and the water outlet automatic water stop valve to be closed, and when the chip U1 receives a closing signal of the manual switch, the chip U1 controls the water outlet automatic water stop valve to be opened;

when the received water flow signal at the hot water inlet is rapidly weakened, the chip U1 controls the cold water automatic regulating valve and the water outlet automatic water stop valve to be closed, and when the chip U1 receives a closing signal of the manual switch, the chip U1 controls the water outlet automatic water stop valve to be opened;

the pipeline (7) consists of a cold water pipeline, a hot water pipeline and a water outlet pipeline, the power supply unit is connected with the pipeline (7), and the control system is connected with the pipeline (7);

the manual switch is used for opening or closing the water outlet valve and adjusting the water outlet flow, the manual switch is in contact with a linkage switch S6, the linkage switch S6 is connected with a P3.3 pin of the chip U1, and the linkage switch S6 is connected with a Vout pin of the chip U2.

2. The intelligent thermostatic valve control device for the solar water heater according to claim 1, wherein the control system further comprises an electricity management unit (8), the electricity management unit (8) comprises a first analog switch and a second analog switch which are connected in parallel, the first analog switch adopts a 4016 chip U3, the second analog switch adopts a 4016 chip U4, power ends of the cold water temperature sensor, the cold water flow sensor and the cold water automatic regulating valve are respectively connected with one end of the chip U3, power ends of the hot water temperature sensor, the hot water flow sensor and the hot water automatic regulating valve are respectively connected with one end of the chip U4, the other end of the chip U3 and the other end of the chip U4 are respectively connected with a Vout pin of the chip U2, and a control end of the chip U3 and a control end of the U4 are respectively connected with a P1.7 pin of the chip U1, A P1.6 pin;

when the control system works in a hot water mode, the chip U1 controls the first analog switch to be switched off,

when the control system works in a cold water mode, the chip U1 controls the second analog switch to be switched off.

3. The intelligent thermostatic valve control device for the solar water heater according to claim 1, wherein the control system is further provided with a low power consumption RESET circuit (9) which is composed of a RESET key S5 and an ultra-low power consumption RESET monitoring device, the ultra-low power consumption RESET monitoring device adopts a chip U6 with the model of MAX6347, a RESET pin of the chip U6 is connected with a RESET input end RST of the chip U1, a VCC pin of the chip U6 is connected with the RESET key S5, and the RESET key S5 is connected with a Vout pin of the chip U2.

4. The intelligent thermostatic valve control device for the solar water heater as claimed in claim 1, wherein the reset button S5 and the linked switch S6 both adopt a compound switch.

5. The thermostatic intelligent valve control device of the solar water heater as claimed in claim 1, characterized in that: the control system is also provided with a display unit (10) which comprises a mode indicator, a set temperature display and an outlet water temperature display, wherein the mode indicator is used for displaying the corresponding working modes of the control system through different green numbers, the set temperature display displays the set temperature through red numbers, and the outlet water temperature display displays the water temperature at the outlet through blue numbers;

the chip U1 rapidly weakens the signal according to the received water flow signal at the cold water inlet to control the red digital flicker of the temperature display, and rapidly weakens the signal according to the received water flow signal at the hot water inlet to control the blue digital flicker of the water outlet temperature display;

the mode indicator, the set temperature display and the outlet water temperature display are all LED nixie tubes, pins of the mode indicator, the set temperature display and the outlet water temperature display are respectively connected with corresponding pins of the chip U1 through buses, a common end of the mode indicator is connected with a data output end Y0 pin of a decoder chip U7, two common ends of the set temperature display are respectively connected with a Y1 pin and a Y2 pin of the decoder chip U7, two common ends of the outlet water temperature display are respectively connected with a Y3 pin and a Y4 pin of the decoder chip U7, a gating end EI of the decoder chip U7 is connected with a pin Vout of the chip U2, and the decoder chip U7 adopts a chip with the model number of 74LS 138;

the corresponding data output end of the chip U1 is connected with the corresponding data input end of an address latch chip U8 through a bus, the address latch chip U8 adopts a chip with the model 74LS373, the latch allowing end LE of the address latch chip U8 is connected with the address latch allowing end ALE of the chip U1, and the pins Q0, Q1 and Q2 of the data output end of the address latch chip U8 are respectively connected with the pin A, B, C of the input end of the decoder chip U7.

6. The intelligent thermostatic valve control device for the solar water heater according to claim 1, wherein the hot water temperature sensor, the cold water temperature sensor and the outlet water temperature sensor are all sensors of type DS18B20, and the hot water flow sensor, the cold water flow sensor and the outlet water flow sensor are all sensors of type IA-UWM-2-GP30-DN 20.

7. The intelligent thermostatic valve control device for the solar water heater as claimed in claim 1, wherein the chips U3 and U4 both use 74HC4016 chips.

8. The intelligent constant-temperature valve control device for the solar water heater according to claim 1, wherein the control system further comprises a wireless transmitting unit (11) for receiving the control signal sent by the chip U1 and sending the control signal to the solar water heater controller (12) to enable the solar water heater controller (12) to start an automatic heating function, the wireless transmitting unit (11) is electrically connected with the chip U1 through a bus, and the wireless transmitting unit (11) is in communication connection with the solar water heater controller (12).

9. The constant-temperature intelligent valve control device of the solar water heater according to claim 1, wherein the wireless sending unit (11) adopts a chip with a model number of VT-CC 1110/1110S-433.

Technical Field

The invention relates to the field of solar water heater control, in particular to a constant-temperature intelligent valve control device for a solar water heater.

Background

In current family, apartment and hotel, shower, wash hand and other hot water's use is provided through the water valve is mixed to the mechanical type more, need adjust the temperature through manual regulation mode in the use, and its adjustment process is slow, leads to the waste problem of water resource easily, and the while is used the invariable overheat of leaving water temperature or subcooling, scald easily or catch a cold, cause the problem that the user uses and experiences the difference.

Disclosure of Invention

The invention provides a constant-temperature intelligent valve control device for a solar water heater, and aims to solve the problems that the existing solar water heater is not constant in outlet water temperature and easy to scald or catch a cold, and water resources are wasted due to low temperature regulation speed.

In order to achieve the purpose, the invention is realized by the following technical scheme: comprises a control system, a power supply unit, a pipeline and a manual switch,

the power supply unit adopts a thermoelectric power generation power supply and comprises a semiconductor thermoelectric power generation sheet TEG, an alternating-current boosting resonance circuit, an ultra-low voltage type boosting conversion chip U2 and an energy storage super capacitor, wherein the chip U2 adopts a chip with the type of LTC 3108;

the control system comprises a constant-temperature intelligent valve controller, and a chip U1 with the model number of AT89C52 is adopted;

the temperature acquisition unit comprises a hot water temperature sensor, a cold water temperature sensor and a water outlet temperature sensor which are sequentially used for acquiring water temperature signals of a hot water inlet, a cold water inlet and a water outlet, the hot water temperature sensor, the cold water temperature sensor and the water outlet temperature sensor are all connected with the chip U1 through leads,

the flow acquisition unit comprises a hot water flow sensor, a cold water flow sensor and a water outlet flow sensor which are sequentially used for acquiring water flow signals at a hot water inlet, a cold water inlet and a water outlet, the hot water flow sensor, the cold water flow sensor and the water outlet flow sensor are all connected with the chip U1 through leads,

the key input control unit comprises a mode selection key S1 and a temperature setting controller, wherein the mode selection key S1 is used for selecting a control system to work in a hot water mode, a cold water mode and a warm water mode, the temperature setting controller is used for setting water temperature, the temperature setting controller comprises a determination key S2, a warming key S3 and a cooling key S4, one end of the mode selection key S1, the determination key S2, the warming key S3 and the cooling key S4 are respectively connected with a seventh pin, a sixth pin, a fifth pin and a fourth pin of an encoding instruction chip U5, the other ends of the mode selection key S1, the determination key S2, the warming key S3 and the cooling key S4 are respectively connected with a Vout pin of the chip U2 through resistors, the encoding instruction chip U5 adopts a chip with the model 74LS148, pins A0 and A1 of the encoding instruction chip U5 are respectively connected with a P2.2 pin of the chip U1, A P2.3 pin;

the automatic adjusting unit comprises a hot water automatic adjusting valve, a cold water automatic adjusting valve and a water outlet automatic water stop valve, the water outlet automatic water stop valve is arranged at the water outlet, and the hot water automatic adjusting valve, the cold water automatic adjusting valve and the water outlet automatic water stop valve are all electrically connected with the chip U1;

when the control system works in a hot water mode, the chip U1 controls the cold water automatic regulating valve to be closed, and controls the water outlet flow of the hot water automatic regulating valve according to the received water flow signal at the water outlet;

when the control system works in a cold water mode, the chip U1 controls the hot water automatic regulating valve to be closed, and controls the water outlet flow of the cold water automatic regulating valve according to the received water flow signal at the water outlet;

when the control system works in a warm water mode, the chip U1 timely adjusts the water outlet flow 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, the cold water inlet and the water outlet and the water flow signals at the hot water inlet, the cold water inlet and the water outlet, so that the water temperature at the water outlet reaches the set temperature and keeps constant;

when the received water flow signal at the cold water inlet is rapidly weakened, the chip U1 controls the hot water automatic regulating valve and the water outlet automatic water stop valve to be closed, and when the chip U1 receives a closing signal of the manual switch, the chip U1 controls the water outlet automatic water stop valve to be opened;

when the received water flow signal at the hot water inlet is rapidly weakened, the chip U1 controls the cold water automatic regulating valve and the water outlet automatic water stop valve to be closed, and when the chip U1 receives a closing signal of the manual switch, the chip U1 controls the water outlet automatic water stop valve to be opened;

the pipeline consists of a cold water pipeline, a hot water pipeline and a water outlet pipeline, the power supply unit is connected with the pipeline, and the control system is connected with the pipeline;

the manual switch is used for opening or closing the water outlet valve and adjusting the water outlet flow, the manual switch is in contact with a linkage switch S6, the linkage switch S6 is connected with a P3.3 pin of the chip U1, and the linkage switch S6 is connected with a Vout pin of the chip U2.

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

when the control system works in a hot water mode, the chip U1 controls the first analog switch to be switched off,

when the control system works in a cold water mode, the chip U1 controls the second analog switch to be switched off.

Preferably, the control system is further provided with a low power consumption RESET circuit, which is composed of a RESET key S5 and an ultra-low power consumption RESET monitoring device, the ultra-low power consumption RESET monitoring device adopts a chip U6 with a model number of MAX6347, a RESET pin of the chip U6 is connected to a RESET input terminal RST of the chip U1, a VCC pin of the chip U6 is connected to the RESET key S5, and the RESET key S5 is connected to a Vout pin of the chip U2.

Preferably, the reset key S5 and the ganged switch S6 both adopt a compound switch.

Preferably, the control system is further provided with a display unit which comprises a mode indicator, a set temperature display and an outlet water temperature display, wherein the mode indicator is used for displaying the corresponding working modes of the control system through different green numbers, the set temperature display displays the set temperature through red numbers, and the outlet water temperature display displays the water temperature at the outlet through blue numbers;

the chip U1 rapidly weakens the signal according to the received water flow signal at the cold water inlet to control the red digital flicker of the temperature display, and rapidly weakens the signal according to the received water flow signal at the hot water inlet to control the blue digital flicker of the water outlet temperature display;

the mode indicator, the set temperature display and the outlet water temperature display are all LED nixie tubes, pins of the mode indicator, the set temperature display and the outlet water temperature display are respectively connected with corresponding pins of the chip U1 through buses, a common end of the mode indicator is connected with a data output end Y0 pin of a decoder chip U7, two common ends of the set temperature display are respectively connected with a Y1 pin and a Y2 pin of the decoder chip U7, two common ends of the outlet water temperature display are respectively connected with a Y3 pin and a Y4 pin of the decoder chip U7, a gating end EI of the decoder chip U7 is connected with a pin Vout of the chip U2, and the decoder chip U7 adopts a chip with the model number of 74LS 138;

the corresponding data output end of the chip U1 is connected with the corresponding data input end of an address latch chip U8 through a bus, the address latch chip U8 adopts a chip with the model 74LS373, the latch allowing end LE of the address latch chip U8 is connected with the address latch allowing end ALE of the chip U1, and the pins Q0, Q1 and Q2 of the data output end of the address latch chip U8 are respectively connected with the pin A, B, C of the input end of the decoder chip U7.

Preferably, the hot water temperature sensor, the cold water temperature sensor and the outlet water temperature sensor are sensors of a DS18B20 model, and the hot water flow sensor, the cold water flow sensor and the outlet water flow sensor are sensors of an IA-UWM-2-GP30-DN20 model.

Preferably, the chips U3 and U4 both use 74HC4016 chips.

Preferably, the control system further comprises a wireless transmitting unit, which is used for receiving the control signal sent by the chip U1 and sending the control signal to the solar water heater controller, so that the solar water heater controller starts an automatic heating function, the wireless transmitting unit is electrically connected with the chip U1 through a bus, and the wireless transmitting unit is in communication connection with the solar water heater controller.

Preferably, the wireless sending unit adopts a chip with the model number of VT-CC 1110/1110S-433.

The invention provides a constant-temperature intelligent valve control device of a solar water heater, which has the following beneficial effects:

(1) the temperature acquisition unit, the flow acquisition unit, the key input control unit, the automatic adjustment unit and the display unit are arranged, so that the outlet water temperature can reach the set temperature, and can be adjusted in time according to the change of parameters in the use process, so that the outlet water temperature is constant, the adjustment speed is high, the waste of water resources is reduced, the functions of preventing scalding and temperature loss are realized, the people can be reminded of danger through digital flicker, and the use comfort of users is improved.

(2) The system is provided with the power consumption management unit, when the system works in a hot water mode, the sensor related to cold water and the automatic regulating valve stop working, and when the system works in a cold water mode, the sensor related to hot water and the automatic regulating valve stop working, so that the energy consumption of the system is greatly reduced.

(3) And a low-power-consumption reset circuit is arranged, so that the power consumption of the system is reduced.

(4) The solar water heater controller is provided with a wireless sending unit which receives the control signal sent by the system and sends the control signal to the solar water heater controller, so that the solar water heater controller starts an automatic heating function and is favorable for quickly adjusting the water temperature.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

FIG. 2 is a flow chart of the control system operation of the present invention.

Fig. 3 is a schematic circuit diagram according to an embodiment of the invention.

In the figure: the solar water heater comprises a constant-temperature intelligent valve controller 1, a thermoelectric power generation power supply 2, a temperature acquisition unit 3, a flow acquisition unit 4, a key input control unit 5, an automatic adjustment unit 6, a pipeline 7, an electricity management unit 8, a low-power-consumption reset circuit 9, a display unit 10, a wireless transmission unit 11 and a solar water heater controller 12.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the embodiments.

Referring to fig. 1 and 2, the thermostatic intelligent valve control device for the solar water heater comprises a control system, a power supply unit, a pipeline and a manual switch, wherein the control system comprises a thermostatic intelligent valve controller 1 which adopts a chip U1 with the model number of AT89C52, and the pipeline comprises a cold water pipeline, a hot water pipeline and a water outlet pipeline.

The power supply unit adopts a thermoelectric power generation power supply 2 and comprises a semiconductor thermoelectric power generation sheet TEG, an alternating current boosting resonant circuit, an ultra-low voltage type boosting conversion chip U2 and an energy storage super capacitor, wherein the chip U2 adopts a chip with the model of LTC3108, two sides of the semiconductor thermoelectric power generation sheet TEG are respectively contacted with a cold water pipeline and a hot water pipeline, the temperature difference of cold water and hot water in the cold water pipeline is converted into electric energy, the semiconductor thermoelectric power generation sheet TEG can adopt a power generation sheet with the model of SP1848-27145 produced by Shenzhen Shenyang electronics Limited, the alternating current boosting resonant circuit consists of a capacitor C1, a transformer primary coil and an ultra-low voltage type boosting conversion chip U2 internal field effect tube, the low voltage generated by the semiconductor thermoelectric power generation sheet TEG is converted into alternating current and boosted through the alternating current boosting resonant circuit and is supplied to the ultra-low voltage boosting conversion chip U2 for rectification, and the stable +5V direct current voltage is output to a back voltage level circuit through Vout of a chip U2, meanwhile, the energy storage super capacitor can be charged through the Vstore end of the chip U2.

The temperature acquisition unit 3 comprises a hot water temperature sensor, a cold water temperature sensor and an outlet water temperature sensor, wherein the hot water temperature sensor, the cold water temperature sensor and the outlet water temperature sensor are respectively arranged at the outlet end of a hot water pipeline, the outlet end of a cold water pipeline and the inlet end of an outlet water pipeline and are sequentially used for acquiring water temperature signals of a hot water inlet, a cold water inlet and a water outlet of a solar water heater, the hot water temperature sensor, the cold water temperature sensor and the outlet water temperature sensor are sensors of a DS18B20 model produced by Dallas semiconductor, DQ pins of the hot water temperature sensor, the cold water temperature sensor and the outlet water temperature sensor are respectively connected with a P2.0 pin of a chip U1, and a VCC pin of an outlet water automatic water stop valve is connected with a Vout end of.

The flow acquisition unit 4 comprises a hot water flow sensor, a cold water flow sensor and a water outlet flow sensor, wherein the hot water flow sensor, the cold water flow sensor and the water outlet flow sensor are sequentially sleeved at the outlet end of a hot water pipeline, the outlet end of a cold water pipeline and the inlet end of a water outlet pipeline and are sequentially used for acquiring water flow signals of a hot water inlet, a cold water inlet and a water outlet, the hot water flow sensor, the cold water flow sensor and the water outlet flow sensor are sensors with the models of IA-UWM-2-GP30-DN20, the manufacturer integrates electrons, and pins D1 and D2 of the hot water flow sensor, the cold water flow sensor and the water outlet flow sensor are connected with a chip U1 through buses.

The key input control unit 5 comprises a mode selection key S1 and a temperature setting controller, wherein the mode selection key S1 is used for selecting the control system to work in a hot water mode, a cold water mode and a warm water mode, the temperature setting controller is used for setting the water temperature of water, the temperature setting controller comprises a determination key S2, a temperature increasing key S3 and a temperature decreasing key S4, when the control system works in the warm water mode, the setting temperature is increased by pressing the temperature increasing key S3, the setting temperature is reduced by pressing the temperature decreasing key S4, and the temperature increasing or reducing command is completed by pressing the determination key S2 at last, one end of the mode selection key S1, the determination key S2, the temperature increasing key S3 and the temperature decreasing key S4 are respectively connected with a fourth pin, a third pin, a second pin and a first pin of a coding command chip U5, the mode selection key S1, the determination key S2, the temperature increasing key S3 and the temperature decreasing key S4 are respectively connected with pins Vout of the chip U2 through corresponding resistors, the code command chip U5 adopts a chip with a model 74LS148, pins A0 and A1 of the code command chip U5 are respectively connected with a pin P2.2 and a pin P2.3 of the chip U1, a pin 10, a pin 11, a pin 12 and a pin 13 of the code command chip U5 are respectively connected with a pin Vout of the chip U2, a pin GS (code output) of the code command chip U5 is connected with a pin P3.2 of the chip U1, an EI (electronic impact) pin of the code command chip U5 is grounded, a mode selection key S1, a determination key S2, a temperature-rising key S3 and a temperature-reducing key S4 are connected to the code command chip U5 according to different importance values, codes are generated as long as the keys are pressed, a signal indicating that the codes are effective is transmitted to the chip U1, and the chip U1 determines the pressed keys by reading two-bit codes, so that the mode selection and the temperature setting are completed.

The automatic adjusting unit 6 comprises a hot water automatic adjusting valve, a cold water automatic adjusting valve and a water outlet automatic water stop valve which are controlled by a PWM-Controller, the water outlet automatic water stop valve is arranged at the outlet end of a water outlet pipeline, the hot water automatic adjusting valve and the cold water automatic adjusting valve are respectively arranged at the outlet end of the hot water pipeline and the outlet end of the cold water pipeline, the hot water automatic adjusting valve, the cold water automatic adjusting valve and the water outlet automatic water stop valve are electrically connected with a chip U1, pins IN1 and IN2 of the hot water automatic adjusting valve are respectively connected with a P1.0 pin and a P1.1 pin of a chip U1, pins IN1 and IN2 of the cold water automatic adjusting valve are respectively connected with a P1.2 pin and a P1.3 pin of a chip U1, and pins IN1 and IN2 of the water outlet automatic water stop valve are respectively connected with a P1.4 pin and a P.

When the control system works in a hot water mode, the chip U1 controls the cold water automatic regulating valve to be closed, and controls the water outlet flow of the hot water automatic regulating valve according to a water flow signal at the water outlet detected by the water outlet flow sensor, so as to control and stabilize the hot water flow;

when the control system works in a cold water mode, the chip U1 controls the hot water automatic regulating valve to be closed, and controls the water outlet flow of the cold water automatic regulating valve according to a water flow signal at the water outlet detected by the water outlet flow sensor, so as to control and stabilize the cold water outflow;

when the control system works in the warm water mode, the chip U1 adjusts the hot water automatic regulating valve and the cold water automatic regulating valve according to the received water temperature signals at the water inlet of the hot water pipeline, the water inlet of the cold water pipeline and the water outlet of the water outlet pipeline and the water flow signals at the water inlet of the hot water pipeline, the water inlet of the cold water pipeline and the water outlet of the water outlet pipeline, controls the water outlet amount of hot water and the water outlet amount of cold water, and enables the water temperature at the water outlet to reach the set temperature and keep constant according to the received set temperature.

When the control system is in the warm water mode, a staged control strategy is adopted, the consumption of water resources is reduced, and the constant temperature of outlet water is ensured:

the first stage control strategy is to quickly discharge cold water close to a valve in a hot water pipeline, close an automatic cold water regulating valve, fully open the automatic hot water regulating valve, and enter the second stage when the hot water temperature detected by a hot water temperature sensor exceeds a set temperature;

the second stage is that cold water and hot water are mixed to enable the outlet water temperature to reach the set temperature quickly, and a proportional control strategy is adopted in the stage, namely 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 detected by the hot water flow sensor is equal to the product of the temperature difference between the set temperature and the cold water flow;

the third stage control strategy is constant temperature, a fuzzy control strategy is adopted, and when the temperature difference between the temperature of the outlet water flowing out through the outlet water pipeline and the set temperature is more than 0.5 ℃, the positions of the hot water automatic regulating valve and the cold water automatic regulating valve are finely adjusted, so that the temperature difference gradually approaches 0.

When the water flow signal that received cold water flow sensor detected weakens rapidly, the scald preventing protect function is launched to the system, and chip U1 control hot water automatic regulating valve and the automatic stagnant water valve that goes out water are closed, and water no longer flows, prevents that the user from being scalded, and when chip U1 received manual switch's turn-off signal, then control hot water automatic regulating valve and play water automatic stagnant water valve and open, can prevent to appear the hot water of too high temperature under the warm water mode.

When a hot water flow sensor detects that a water flow signal is rapidly weakened, the system starts the anti-desuperheating protection function, the chip U1 controls the cold water automatic regulating valve and the water outlet automatic water stop valve to be closed, water does not flow out at the moment, and when the chip U1 receives a closing signal of the manual switch, the cold water automatic regulating valve and the water outlet automatic water stop valve are controlled to be opened, so that cold water with too low temperature in a warm water mode can be prevented.

The manual switch is mechanically arranged on the water outlet pipeline and is only used for adjusting the water outlet flow, the manual switch is in contact with a linkage switch S6, the linkage switch S6 adopts a composite switch, the linkage switch S6 is electrically connected with a chip U1, the linkage switch S6 is connected with a P3.3 pin of a chip U1, the linkage switch S6 is connected with a Vout pin of a chip U2, when the manual switch is turned off, the manual switch is pressed against the linked switch S6, so that the Vout pin of the chip U2 is connected to the P3.3 pin of the chip U1, the chip U1 receives the turn-off signal of the manual switch, when the manual switch is turned on, one contact of the linked switch S6 is grounded, so that a negative pulse signal is received by the P3.3 pin of the chip U1, the chip U1 can receive the turn-on signal of the manual switch, the control system is enabled to enter a working state, and when the manual switch is turned off from the turn-on state, the control system stops working.

Preferably, the control system further comprises an electricity utilization management unit 8, the electricity utilization management unit 8 comprises a first analog switch and a second analog switch which are connected in parallel, the first analog switch adopts a 4016 chip U3, the second analog switch adopts a 4016 chip U4, and the chips U3 and U4 both adopt 74HC4016 chips.

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

When the control system works in a hot water mode, the chip U1 outputs a control signal to the chip U3, the first analog switch, namely the chip U3 is disconnected, and the cold water temperature sensor, the cold water flow sensor and the cold water automatic regulating valve are disconnected with the power supply to stop working, so that the power consumption of the system is reduced;

when the control system works in a cold water mode, the chip U1 outputs a control signal to the second analog switch, namely the chip U4, so that the second analog switch is disconnected, the hot water temperature sensor, the hot water flow sensor and the hot water automatic regulating valve are disconnected with the power supply to stop working, the power consumption of the system is reduced,

when the control system works in the warm water mode, the chip U3 is in signal connection with the cold water temperature sensor, the cold water flow sensor and the cold water automatic regulating valve, the chip U4 is in signal connection with the hot water temperature sensor, the hot water flow sensor and the hot water automatic regulating valve, and all the sensors and the automatic regulating valves work.

Preferably, the control system further comprises a low power RESET circuit 9, which is composed of a RESET key S5 and an ultra-low power RESET monitoring device, wherein the ultra-low power RESET monitoring device is a chip U6 with a model number MAX6347, the RESET key S5 is a combination switch, the RESET pin of the chip U6 is connected to the RESET input RST of the chip U1, the VCC pin of the chip U6 is connected to the RESET key S5, the RESET key S5 is connected to the Vout pin of the chip U2, the VCC pin of the chip U6 is connected to the Vout pin of the chip U2 before the RESET key S5 is pressed, and when the voltage at the VCC terminal of the chip U6 is kept stable, the RESET pin of the chip U6 outputs a low level, and when the RESET key S5 is pressed, the VCC pin of the chip U6 is grounded at 0, the chip U6 monitors the voltage change, and outputs a high level at the RESET pin thereof, and the high level is added to the RESET input RST input of the chip RST key S1, the chip U1 is reset, the default warm water mode is entered, the automatic water outlet stop valve is also in an open state, and the control system works again.

Preferably, the control system is further provided with a display unit 10 which comprises a mode indicator, a set temperature display and AN outlet water temperature display, wherein the mode indicator is used for displaying working modes corresponding to the control system through different green numbers, the hot water mode correspondingly displays '1', the warm water mode correspondingly displays '2', the cold water mode correspondingly displays '3', the set temperature display displays the set temperature through red numbers, the outlet water temperature display displays the water temperature at the water outlet through BLUE numbers, the mode indicator, the set temperature display and the outlet water temperature display all adopt LED nixie tubes, the mode indicator adopts a 7SEG-COM-AN-GRN nixie tube, the set temperature display adopts a 7SEG-MPX2-CC nixie tube, and the outlet water temperature display adopts a 7SEG-MPX2-CC-BLUE nixie tube.

Pins of the mode indicator, the set temperature display and the outlet water temperature display are respectively connected with a P0.0 pin, a P0.1 pin, a P0.2 pin, a P0.3 pin, a P0.4 pin, a P0.5 pin, a P0.6 pin and a P0.7 pin of a chip U1 through buses, a common end of the mode indicator is connected with a Y0 pin of a data output end of a decoder chip U7, the decoder chip U7 adopts a chip with a model of 74LS138, two common ends of the set temperature display are respectively connected with a Y1 pin and a Y2 pin of the decoder chip U7, two common ends of the outlet water temperature display are respectively connected with a Y3 pin and a Y4 pin of the decoder chip U7, a gating end E1 of the decoder chip U7 is connected with a Vout pin of the chip U2, and gating ends E2 and E3 of the decoder chip U7 are grounded.

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

When the chip U1 rapidly weakens according to the cold water flow signal of the cold water inlet that the cold water flow sensor received detected, send control signal to setting for the temperature display, two red figures of setting for the temperature display flash simultaneously, remind people to notice scald danger, when the hot water flow signal that detects according to the hot water flow sensor received rapidly weakens, send control signal to going out the water temperature display, two blue figures of control going out the water temperature display flash simultaneously, remind people to notice cold water danger.

Preferably, the control system further comprises a wireless transmitting unit 11, which is used for receiving the control signal sent by the chip U1 and sending the control signal to the solar water heater controller 12, so that the solar water heater controller 12 starts the automatic heating function, the wireless transmitting unit 11 is electrically connected with the chip U1 through a bus, and the wireless transmitting unit 11 is in communication connection with the solar water heater controller 12.

When the system works in a warm water mode or a hot water mode, the current available hot water amount is timely calculated according to the value of a hot water flow sensor, when the available time is less than the minimum default value of the system, a control signal is sent by a wireless sending unit 11 to start the automatic heating function of the solar water heater, the wireless sending unit 11 adopts a chip with the model of VT-CC1110/1110S-433, a CSN pin of the chip of VT-CC1110/1110S-433 is connected with a P2.1 pin of a chip U1, a D1 pin is connected with a P3.1 pin of a chip U1, a D2 pin is connected with a P3.0 pin of a chip U1, a VCC pin of the chip of VT-CC1110/1110S-433 is connected with one end of a chip U4, when the system works in a cold water mode, the chip U1 can disconnect a second analog switch, so that the VT-CC/1110S-433 chip is disconnected from a power supply to stop working, and the energy consumption of the system is reduced.

As shown in fig. 3, which is a working flow chart of the present invention, the system starts to work, the working mode is selected, the manual switch is turned on after the hot water mode or the cold water mode is selected, the manual switch is turned on after the warm water mode is selected, the temperature setting is performed, the manual switch is turned off after the use, the system stops working, and if the automatic water stop valve for water outlet is in a closed state, the automatic water stop valve for water outlet is turned on when the manual switch is turned off.

In the process of using the manual switch after being opened, if the chip U1 detects that the parameters are abnormal, the system starts the functions of scald prevention and temperature loss prevention, simultaneously sets the digital flashing of the temperature display and the water outlet temperature display correspondingly, closes the automatic water stop valve for water outlet, closes the automatic hot water regulating valve or the automatic cold water regulating valve, sets the digital flashing stop of the temperature display or the water outlet temperature display after the manual switch is closed and a reset key S5 is pressed, displays the corresponding temperature value, and opens the automatic water stop valve for water outlet; if the user wants to recover the use, the manual switch needs to be turned on and the flow rate needs to be adjusted, and the water can be used when the water outlet temperature is proper.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.