Solar heating light sensation backflow control system

Abstract

The utility model provides a solar heating light sensation backflow control system, and belongs to the technical field of heating control. According to the solar heating light sensation backflow control system, the first end of solar heat collection equipment communicates with the first end of a solar heat storage water tank through a first pipeline, the second end of the solar heat collection equipment communicates with the second end of the solar heat storage water tank through a second pipeline, and one end of a third pipeline communicates with the second pipeline; the other end of the third pipeline is communicated with the third end of the solar heat storage water tank, and an electromagnetic valve is arranged on the third pipeline; an electric auxiliary heating device is arranged on the fourth pipeline; the output end of the illumination detection module is connected with the first end of the electromagnetic valve control module and the control end of the electric auxiliary heating control module. The second end of the electromagnetic valve control module is used for controlling the electromagnetic valve. The second end of the electric auxiliary heating control module is used for controlling electric auxiliary heating equipment. The problem that a control system lacks accuracy can be solved, and the energy utilization efficiency and the heating stability are improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of heating control, in particular to a solar heating light-sensing backflow control system. BACKGROUND

[0002] With the increasing demand for clean energy worldwide, solar energy as a renewable and pollution-free energy source has attracted more and more attention in the field of heating. However, there are some limitations in existing solar heating systems. Traditional solar heating systems lack efficient and accurate control mechanisms, and cannot adjust the heating operation state in real time according to the light intensity, resulting in energy waste or poor heating effect. Therefore, an intelligent and accurate solar heating light-sensing backflow control system is needed. CONTENT OF THE INVENTION

[0003] The present disclosure provides a solar heating light-sensing backflow control system to solve the problem of lack of accuracy in the control system and improve energy utilization efficiency and heating stability.

[0004] The present disclosure provides a solar heating light-sensing backflow control system, comprising:

[0005] a solar heat collecting device, a solenoid valve, a solar heat storage water tank, an electric auxiliary heating device, a solenoid valve control module, a light detection module, and an electric auxiliary heating control module;

[0006] The first end of the solar heat collecting device is connected to the first end of the solar heat storage water tank through a first pipeline, the second end of the solar heat collecting device is connected to the second end of the solar heat storage water tank through a second pipeline, one end of a third pipeline is connected to the second pipeline, the other end of the third pipeline is connected to the third end of the solar heat storage water tank, and a solenoid valve is arranged on the third pipeline;

[0007] The fourth end of the solar heat storage water tank is connected to the water inlet of the user end through a fourth pipeline, the fourth pipeline has an electric auxiliary heating device, and the fifth end of the solar heat storage water tank is connected to the water outlet of the user end through a fifth pipeline;

[0008] The light detection module is configured to detect the light intensity, the output end of the light detection module is connected to the first end of the solenoid valve control module and the control end of the electric auxiliary heating control module, respectively, and the second end of the solenoid valve control module is used to control the solenoid valve;

[0009] The first end of the electric auxiliary heating control module is used to connect to the power supply, the second end of the electric auxiliary heating control module is used to control the electric auxiliary heating device, and the electric auxiliary heating control module is configured to detect the water temperature in the solar heat storage water tank and control the electric auxiliary heating device.

[0010] In an example embodiment of the present disclosure, the light detection module comprises a photoresistor U2, an operational amplifier U1, an operational amplifier U3, an operational amplifier U4, a resistor R2, a resistor R5, a resistor R6 and a rheostat RP2;

[0011] The first end of the photoresistor U2 is connected with the first end of the resistor R2, the inverting input terminal of the operational amplifier U1 and the first end of the resistor R5 respectively;

[0012] The second end of the resistor R2 is grounded;

[0013] The non-inverting input terminal of the operational amplifier U1 is connected with a reference voltage, and the output terminal of the operational amplifier U1 is connected with the second end of the photoresistor U2 and the non-inverting input terminal of the operational amplifier U3 respectively;

[0014] The second end of the resistor R5 is connected with the inverting input terminal of the operational amplifier U3, and the output terminal of the operational amplifier U3 is connected with the inverting input terminal of the operational amplifier U3 through the resistor R6;

[0015] The output terminal of the operational amplifier U3 is connected with the inverting input terminal of the operational amplifier U4;

[0016] The non-inverting input terminal of the operational amplifier U4 is connected with the sliding end of the rheostat RP2, and the output terminal of the operational amplifier U4 is connected with the control terminal of the electromagnetic valve control module;

[0017] The first end of the rheostat RP2 is connected with a power supply VCC, and the second end of the rheostat RP2 is grounded.

[0018] In an example embodiment of the present disclosure, the light detection module further comprises a resistor R1, a sliding resistor RP1 and a zener U8;

[0019] The non-inverting input terminal of the operational amplifier U1 and the first end of the sliding resistor RP1 are both connected with the first end of the resistor R1;

[0020] The second end of the resistor R1 is grounded;

[0021] The second end of the sliding resistor RP1 is grounded, and the sliding end of the sliding resistor RP1 is connected with the reference terminal of the zener U8;

[0022] The cathode of the zener U8 is connected with the non-inverting input terminal of the operational amplifier U1, and the anode of the zener U8 is grounded.

[0023] In an example embodiment of the present disclosure, the electromagnetic valve control module comprises a switch tube Q1, and the electromagnetic valve comprises an electromagnetic valve control coil L1; the control terminal of the switch tube Q1 is connected with the output terminal of the light detection module;

[0024] The first end of the switch tube Q1 is connected with the first end of the electromagnetic valve control coil L1, and the second end of the switch tube Q1 is grounded;

[0025] The second end of the electromagnetic valve control coil L1 is connected with the power supply VCC.

[0026] In an example embodiment of the present disclosure, the electric auxiliary heating control module comprises a temperature detection circuit and a heating control circuit;

[0027] The control end of the temperature detection circuit is connected to the output end of the light detection module, the first end of the temperature detection circuit is used for connecting a power supply, the second end of the temperature detection circuit is connected to the first end of the heating control circuit, and the second end of the heating control circuit is used for controlling an electric auxiliary heating device;

[0028] The temperature detection circuit comprises a transistor Q4, a temperature sensor RT and a resistor R14;

[0029] The base of the transistor Q4 is connected to the output end of the light detection module, the emitter of the transistor Q4 is connected to a power supply VCC, and the collector of the transistor Q4 is connected to the first end of the temperature sensor RT;

[0030] The second end of the temperature sensor RT is connected to the first end of the resistor R14; and the second end of the temperature sensor RT is connected to the first end of the heating control circuit;

[0031] The second end of the resistor R14 is grounded;

[0032] The temperature sensor RT is configured to detect the water temperature in a solar heat storage water tank.

[0033] In an example embodiment of the present disclosure, the temperature detection circuit further comprises an operational amplifier U6, an operational amplifier U5, a resistor R11, a resistor R13 and a sliding resistor RP3;

[0034] The non-inverting input end of the operational amplifier U6 is connected to the second end of the temperature sensor RT, and the inverting input end of the operational amplifier U6 is connected to the first end of the resistor R13;

[0035] The second end of the resistor R13 is grounded;

[0036] The output end of the operational amplifier U6 is connected to the inverting input end of the operational amplifier U6 through the resistor R11, and the output end of the operational amplifier U6 is connected to the inverting input end of the operational amplifier U5;

[0037] The non-inverting input end of the operational amplifier U5 is connected to the sliding end of the sliding resistor RP3, and the output end of the operational amplifier U5 is connected to the first end of the heating control circuit;

[0038] The first end of the sliding resistor RP3 is connected to the collector of the transistor Q4, and the second end of the sliding resistor RP3 is grounded.

[0039] In an example embodiment of the present disclosure, the heating control circuit comprises a transistor Q2, a resistor R9, a thyristor Q3 and a relay K1; and the electric auxiliary heating device comprises an electric heating wire U7;

[0040] The base of the triode Q2 is connected to the second end of the temperature detection circuit, the collector of the triode Q2 is connected to the power supply VCC, and the emitter of the triode Q2 is respectively connected to the first end of the resistor R9 and the gate of the thyristor Q3.

[0041] The second end of the resistor R9 is grounded.

[0042] The cathode of the thyristor Q3 is grounded, and the anode of the thyristor Q3 is connected to the first input end of the relay K1.

[0043] The second input end of the relay K1 is connected to the power supply VCC, the common end of the relay K1 is connected to the power supply VCC, and the normally open end of the relay K1 is connected to the first power supply end of the electric heating wire U7.

[0044] The second power supply end of the electric heating wire U7 is grounded.

[0045] The solar heating light sensing backflow control system provided by the embodiment of the present disclosure has the following beneficial effects:

[0046] The present disclosure intelligently adjusts the opening and closing of the electromagnetic valve through the light detection module, maximizes the utilization of solar energy, avoids unnecessary heat loss in the absence of sunlight or weak light, and improves energy utilization efficiency. At the same time, the combination of electric auxiliary heating equipment and light sensing control can automatically adjust the heating power according to the actual water temperature in the solar heat storage water tank, ensuring stable and comfortable water supply temperature at the user end and enhancing the reliability and practicality of the heating system. Therefore, the present disclosure can accurately adjust the circulating flow direction of water by controlling the opening and closing of the electromagnetic valve according to the intensity of light, thereby improving energy utilization efficiency and heating stability. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0048] Figure 1 is a structural schematic diagram of a solar heating light sensing backflow control system provided by the embodiment of the present disclosure;

[0049] Figure 2 is a circuit schematic diagram of a light sensing control system provided by the embodiment of the present disclosure. DETAILED DESCRIPTION

[0050] In order to make the person skilled in the art better understand the scheme, the technical solutions in the scheme embodiments will be clearly described below in combination with the drawings in the scheme embodiments. Obviously, the described embodiments are part of the embodiments of the scheme, rather than all the embodiments. Based on the embodiments in the scheme, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the scheme.

[0051] The term "comprising" and other any variations thereof in the specification and claims of the scheme and the above-mentioned drawings means "including but not limited to", which is intended to cover non-exclusive inclusion and is not limited to the examples listed in the text. In addition, the terms "first" and "second" and the like are used to distinguish different objects, rather than to describe a specific order.

[0052] The implementation of the present disclosure is described in detail below in combination with specific drawings:

[0053] Figure 1 A structural schematic diagram of a solar heating light sensing backflow control system provided by the embodiments of the present disclosure is shown in FIG. 1. Figure 1 The solar heating light sensing backflow control system comprises:

[0054] A solar heat collecting device 101, a solenoid valve 102, a solar heat storage water tank 103, an electric auxiliary heating device 104, a solenoid valve control module 105, a light detection module 106 and an electric auxiliary heating control module 107;

[0055] The first end of the solar heat collecting device 101 is connected to the first end of the solar heat storage water tank 103 through a first pipeline 1, the second end of the solar heat collecting device 101 is connected to the second end of the solar heat storage water tank 103 through a second pipeline 2, one end of a third pipeline 3 is connected to the second pipeline 2, the other end of the third pipeline 3 is connected to the third end of the solar heat storage water tank 103, and the third pipeline 3 is provided with the solenoid valve 102;

[0056] The fourth end of the solar heat storage water tank 103 is connected to the water inlet of the user end through a fourth pipeline 4, and the fourth pipeline 4 is provided with the electric auxiliary heating device 104, and the fifth end of the solar heat storage water tank 103 is connected to the water outlet of the user end through a fifth pipeline 5;

[0057] The light detection module 106 is configured to detect the light intensity, the output end of the light detection module 106 is connected to the first end of the solenoid valve control module 105 and the control end of the electric auxiliary heating control module 107 respectively, and the second end of the solenoid valve control module 105 is used to control the solenoid valve 102;

[0058] The first end of the electric auxiliary heating control module 107 is used for connecting a power supply, and the second end of the electric auxiliary heating control module 107 is used for controlling the electric auxiliary heating device 104; the electric auxiliary heating control module 107 is configured to detect the water temperature in the solar heat storage water tank 103 and control the electric auxiliary heating device 104.

[0059] In the embodiment, the solar heat collecting device 101 is configured to collect solar energy and convert it into heat energy, which can heat the water flowing therethrough. The solar heat storage water tank 103 is configured to store the hot water heated by the solar heat collecting device 101, and the water tank has a plurality of ports connected to different pipelines respectively to realize water circulation with the solar heat collecting device 101 and the user end.

[0060] The electromagnetic valve 102 is installed on the third pipeline 3 and is configured to control the flow of water in the pipeline. When the electromagnetic valve 102 is opened, the water in the solar heat collecting device 101 can flow back to the solar heat storage water tank 103 through the third pipeline 3, the water in the solar heat storage water tank 103 is heated by the electric auxiliary heating device 104 on the fourth pipeline 4, and then flows into the water inlet of the user end, and the water outlet of the user end flows the water into the solar heat storage water tank 103 through the fifth pipeline 5 and no longer continues to flow to the solar heat collecting device 101, thereby forming an electric auxiliary heating cycle. When the electromagnetic valve 102 is closed, the water in the solar heat collecting device 101 flows through the solar heat storage water tank 103 through the second pipeline 2, the water flowing through the water tank flows into the water inlet of the user end through the fourth pipeline 4, the water outlet of the user end flows the water into the solar heat storage water tank 103 through the fifth pipeline 5, and finally the solar heat storage water tank 103 flows the water into the solar heat collecting device 101 through the first pipeline 1 for heating, thereby forming a solar heating cycle.

[0061] The electric auxiliary heating device 104 is installed on the fourth pipeline 4 and can heat the water flowing out of the fourth end of the solar heat storage water tank 103 when the heat provided by the solar energy is insufficient (i.e., the light intensity is weak), so as to ensure that hot water with sufficient temperature is provided to the user end.

[0062] The light detection module 106 is configured to detect the light intensity in real time, and when it is detected that the light intensity is strong, cutoff instructions are sent to the electromagnetic valve control module 105 and the electric auxiliary heating control module 107 respectively, and when it is detected that the light intensity is weak, on instruction is sent to the electromagnetic valve control module 105 and the electric auxiliary heating control module 107 respectively.

[0063] The electromagnetic valve control module 105 receives the signal of the light detection module 106 and controls the opening and closing of the electromagnetic valve 102 according to the light intensity, so as to adjust the backflow of the water. The electric auxiliary heating control module 107 can not only detect the water temperature in the solar heat storage water tank 103, but also control the opening and closing of the electric auxiliary heating device 104 according to the water temperature and the light intensity signal.

[0064] Specifically, when the light detection module 106 detects strong light, the electromagnetic valve control module 105 controls the electromagnetic valve 102 to close, the electric auxiliary heating control module 107 controls the electric auxiliary heating device 104 to close, and the hot water is normally circulated and heated between the solar heat collecting device 101 and the solar heat storage water tank 103, so as to meet the heating demand of the user end. When the light detection module 106 detects weak light, the electromagnetic valve control module 105 controls the electromagnetic valve 102 to open, the electric auxiliary heating control module 107 controls the electric auxiliary heating device 104 to open, the water in the solar heat collecting device 101 flows into the solar heat storage water tank 103 through the third pipeline 3, and then the water in the solar heat storage water tank 103 flows into the fourth pipeline 4 and is heated by the electric auxiliary heating device 104, so as to guarantee the heating effect.

[0065] From the above, it can be concluded that the disclosure realizes the maximum utilization of solar energy by intelligently adjusting the opening and closing of the electromagnetic valve 102 through the light detection module 106, avoids unnecessary heat loss under the conditions of no sunlight or weak light, and improves the energy utilization efficiency. At the same time, the electric auxiliary heating device 104 is combined with light sensing control, which can automatically adjust the heating power according to the actual water temperature in the solar heat storage water tank 103, so as to ensure that the water temperature at the user end is stable and comfortable, and the reliability and practicality of the heating system are enhanced. Therefore, the disclosure can accurately adjust the circulation direction of water by controlling the opening and closing of the electromagnetic valve 102, so as to improve the energy utilization efficiency and heating stability.

[0066] In one embodiment of the disclosure, referring to Figure 2 , the light detection module 106 includes a photosensitive resistor U2, an operational amplifier U1, an operational amplifier U3, an operational amplifier U4, a resistor R2, a resistor R5, a resistor R6 and a variable resistor RP2;

[0067] The first end of the photosensitive resistor U2 is connected with the first end of the resistor R2, the inverting input end of the operational amplifier U1 and the first end of the resistor R5 respectively;

[0068] The second end of the resistor R2 is grounded;

[0069] The non-inverting input end of the operational amplifier U1 is used to be connected with a reference voltage, and the output end of the operational amplifier U1 is connected with the second end of the photosensitive resistor U2 and the non-inverting input end of the operational amplifier U3 respectively;

[0070] The second end of the resistor R5 is connected with the inverting input end of the operational amplifier U3, and the output end of the operational amplifier U3 is connected with the inverting input end of the operational amplifier U3 through the resistor R6;

[0071] The output end of the operational amplifier U3 is connected with the inverting input end of the operational amplifier U4;

[0072] The in-phase input end of the operational amplifier U4 is connected to the sliding end of the rheostat RP2, and the output end of the operational amplifier U4 is connected to the control end of the electromagnetic valve control module 105.

[0073] The first end of the rheostat RP2 is connected to the power supply VCC, and the second end of the rheostat RP2 is grounded.

[0074] In this embodiment, the resistance of the photoresistor U2 changes with the change of the light intensity, and the resistance decreases when the light intensity increases, and the resistance increases when the light intensity decreases. The photoresistor U2 and the resistor R2 form a voltage dividing circuit, and the voltage at the voltage dividing point changes with the light intensity, and the voltage is sent to the inverting input end of the operational amplifier U1. The operational amplifier U1 is equivalent to a same-phase proportional amplifier, and since the voltage at the inverting input end changes with the light, the operational amplifier U1 adjusts the output through negative feedback, so that the output voltage can reflect the change of the light intensity, that is, the stronger the light intensity, the smaller the output voltage; the weaker the light intensity, the larger the output voltage.

[0075] The first end of the resistor R5 is connected to the voltage dividing point of the photoresistor U2 and the resistor R2, and provides a voltage signal related to the light intensity for the inverting input end of the operational amplifier U3. The in-phase input end of the operational amplifier U3 is connected to the output voltage of the operational amplifier U1, so that the operational amplifier U3 forms a differential amplification circuit, which amplifies the difference between the output voltage of the operational amplifier U1 and the voltage at the inverting input end, further highlights the signal difference caused by the change of the light intensity, and enhances the anti-interference ability and sensitivity of the signal.

[0076] The rheostat RP2 can change the reference voltage output by the sliding end by adjusting the position of the sliding contact. The operational amplifier U4 is used as a voltage comparator, which compares the amplified voltage signal (i.e. the light intensity) at the inverting input end with the reference voltage at the in-phase input end. When the amplified voltage signal is greater than the reference voltage, a high level is output; when the amplified voltage signal is less than the reference voltage, a low level is output. The high and low level signals are sent to the electromagnetic valve control module 105 to control the switching of the electromagnetic valve 102, thereby realizing the control of the water flow of the system according to the light intensity.

[0077] From the above, it can be concluded that the embodiment can realize accurate detection of the environmental light intensity. The dynamic response of the photoresistor U2 is combined with the signal amplification function of the operational amplifier, which improves the sensitivity and accuracy of the light detection. The introduction of the rheostat RP2 provides flexibility for users to adjust the threshold, which is convenient for setting the control point of the light intensity according to actual needs.

[0078] In one embodiment of the present disclosure, the reference Figure 2 , the light detection module 106 further comprises a resistor R1, a sliding resistor RP1 and a voltage stabilizing tube U8;

[0079] The non-inverting input terminal of the operational amplifier U1 and the first terminal of the slide resistor RP1 are connected to the first terminal of the resistor R1.

[0080] The second terminal of the resistor R1 is grounded.

[0081] The second terminal of the slide resistor RP1 is grounded, and the sliding terminal of the slide resistor RP1 is connected to the reference terminal of the voltage stabilizing tube U8.

[0082] The cathode of the voltage stabilizing tube U8 is connected to the non-inverting input terminal of the operational amplifier U1, and the anode of the voltage stabilizing tube U8 is grounded.

[0083] In this embodiment, the power supply voltage is divided by the voltage dividing circuit composed of the resistor R1 and the slide resistor RP1. By adjusting the position of the sliding contact of the slide resistor RP1, the voltage output by the sliding terminal can be changed, which serves as the reference voltage of the voltage stabilizing tube U8.

[0084] The voltage stabilizing tube U8 can be a TL431 chip, which is a controllable precision voltage stabilizing source. The reference terminal of the voltage stabilizing tube U8 receives a variable reference voltage, and by adjusting the slide resistor RP1, the voltage value of the reference terminal can be changed, thereby affecting the output of the voltage stabilizing tube U8. The cathode of the voltage stabilizing tube U8 provides a stable reference voltage for the operational amplifier U1. When the voltage of the reference terminal changes, the voltage stabilizing tube U8 will automatically adjust the output voltage of the cathode to maintain a relatively stable value.

[0085] From the above, it can be seen that by adjusting the slide resistor RP1 and combining the stable voltage characteristics of the voltage stabilizing tube U8, a stable reference voltage is provided for the operational amplifier U1, thereby improving the stability and reliability of the light detection.

[0086] In one embodiment of the present disclosure, the reference Figure 2 , the electromagnetic valve control module 105 includes a switch tube Q1; the electromagnetic valve 102 includes an electromagnetic valve 102 control coil L1; the control end of the switch tube Q1 is connected to the output end of the light detection module 106;

[0087] The first end of the switch tube Q1 is connected to the first end of the electromagnetic valve 102 control coil L1, and the second end of the switch tube Q1 is grounded.

[0088] The second end of the electromagnetic valve 102 control coil L1 is connected to the power supply VCC.

[0089] In this embodiment, the switch tube Q1 is a P-channel MOS tube. The characteristic of the P-channel MOS tube is that when the control end voltage is lower than the first end voltage by a certain value (i.e. threshold voltage, set according to experience), the MOS tube is turned on; when the control end voltage is close to or higher than the source voltage, the MOS tube is turned off. The signal output by the light detection module 106 changes the voltage of the control end of the MOS tube, thereby controlling its on and off states.

[0090] When the switch tube Q1 is turned on, a current path is formed from the power supply VCC through the electromagnetic valve 102 control coil L1, the switch tube Q1 to the ground; when the switch tube Q1 is turned off, the current path is cut off.

[0091] Specifically, when the light detection module 106 detects that the light intensity is weak, a low-level signal is output to the control end of the switch tube Q1. The switch tube Q1 is turned on, and the power supply VCC forms a current path through the electromagnetic valve 102 control coil L1 and the turned-on switch tube Q1, the coil generates a magnetic field, the electromagnetic valve 102 is opened, and the water is allowed to flow in the corresponding pipeline. When the light detection module 106 detects that the light intensity is strong, a low-level signal is output to the control end of the switch tube Q1. The switch tube Q1 is turned off, and no current passes through the electromagnetic valve 102 control coil L1, the magnetic field disappears, the electromagnetic valve 102 is closed, and the water flow is blocked.

[0092] From the above, it can be concluded that the embodiment controls the switch tube Q1 through the light detection module 106, realizes the automatic opening and closing of the electromagnetic valve 102, does not need manual intervention, and improves the automation level of the system.

[0093] In an embodiment of the present disclosure, referring to Figure 2 , the electric auxiliary heating control module 107 includes a temperature detection circuit and a heating control circuit;

[0094] The control end of the temperature detection circuit is connected to the output end of the light detection module 106, the first end of the temperature detection circuit is used to connect the power supply, the second end of the temperature detection circuit is connected to the first end of the heating control circuit, and the second end of the heating control circuit is used to control the electric auxiliary heating device 104;

[0095] The temperature detection circuit includes a transistor Q4, a temperature sensor RT, and a resistor R14;

[0096] The base of the transistor Q4 is connected to the output end of the light detection module 106, the emitter of the transistor Q4 is connected to the power supply VCC, and the collector of the transistor Q4 is connected to the first end of the temperature sensor RT;

[0097] The second end of the temperature sensor RT is connected to the first end of the resistor R14; the second end of the temperature sensor RT is connected to the first end of the heating control circuit;

[0098] The second end of the resistor R14 is grounded;

[0099] The temperature sensor RT is configured to detect the water temperature in the solar heat storage water tank 103.

[0100] In this embodiment, the electric auxiliary heating control module 107 is configured to control the opening and closing of the electric auxiliary heating device 104 based on the light intensity and the water temperature in the solar hot water storage tank 103, ensuring that the system can be replenished with heat in a timely manner when solar heat is insufficient to meet heating needs. The temperature detection circuit is configured to detect the water temperature in the solar hot water storage tank 103 and transmit the relevant signal to the heating control circuit, which controls the working state of the electric auxiliary heating device 104 according to the received signal.

[0101] Transistor Q4 acts as a switch. Q4 is a PNP type, and the signal output from the light detection module 106 controls its on / off state. When the light detection module 106 outputs a low level, transistor Q4 is on, and power is supplied to the temperature sensor RT through Q4; when the output is high, transistor Q4 is off, and the temperature sensor RT stops working. The temperature sensor RT can be an NTC thermistor, whose resistance decreases as the water temperature rises and increases as the water temperature falls. Resistor R14 and the temperature sensor RT form a voltage divider circuit.

[0102] Specifically, when the light detection module 106 detects strong light intensity, it outputs a high-level signal to the base of transistor Q4, causing Q4 to turn off. The temperature sensor RT has no power supply and does not operate; the heating control circuit does not receive a water temperature signal, and the electric auxiliary heating device 104 is in a closed state. When the light detection module 106 detects weak light intensity, it outputs a low-level signal to the base of transistor Q4, turning Q4 on. The power supply VCC powers the temperature sensor RT through transistor Q4, and the temperature sensor RT begins detecting the water temperature in the tank. If the water temperature in the tank is low, the NTC thermistor has a high resistance, resulting in a small voltage drop across resistor R14. This voltage signal is transmitted to the heating control circuit, which determines that the electric auxiliary heating device 104 needs to be activated. The electric auxiliary heating device 104 then begins operating to supplement the system with heat.

[0103] As can be seen from the above, the electric auxiliary heating control module 107 integrates temperature detection and heating control functions, and achieves intelligent response through linkage control with the light detection module 106. The temperature detection circuit, composed of transistor Q4, thermometer RT, and resistor R14, accurately detects the water temperature in the solar water storage tank 103. When the water temperature is insufficient, the heating control circuit automatically activates the electric auxiliary heating device 104, ensuring stable water temperature and improving the system's energy efficiency and user experience.

[0104] In one embodiment of this disclosure, reference is made to Figure 2 The temperature detection circuit also includes operational amplifier U6, operational amplifier U5, resistor R11, resistor R13 and sliding resistor RP3;

[0105] The non-inverting input of op-amp U6 is connected to the second terminal of the temperature sensor RT, and the inverting input of op-amp U6 is connected to the first terminal of resistor R13.

[0106] The second end of the resistor R13 is grounded.

[0107] The output end of the operational amplifier U6 is connected to the inverting input end of the operational amplifier U6 through the resistor R11, and the output end of the operational amplifier U6 is connected to the inverting input end of the operational amplifier U5.

[0108] The non-inverting input end of the operational amplifier U5 is connected to the sliding end of the sliding resistor RP3, and the output end of the operational amplifier U5 is connected to the first end of the heating control circuit.

[0109] The first end of the sliding resistor RP3 is connected to the collector of the triode Q4, and the second end of the sliding resistor RP3 is grounded.

[0110] In the embodiment, when the light detection module 106 detects that the light intensity is weak, a low-level signal is output to turn on the triode Q4, and the power supply supplies power to the temperature detector RT and the sliding resistor RP3 through the triode Q4.

[0111] The temperature detector RT detects the water temperature in the solar heat storage water tank 103, and the resistance value changes with the water temperature, thereby generating a voltage signal related to the water temperature at the second end thereof. The signal is input to the non-inverting input end of the operational amplifier U6, and after being amplified in a non-inverting manner, an amplified voltage signal is output. In the embodiment, a suitable reference voltage is set by adjusting the position of the sliding contact of the sliding resistor RP3, and the voltage reflects the water temperature threshold at which the electric auxiliary heating device 104 needs to be started.

[0112] The operational amplifier U5 compares the amplified voltage signal (i.e., the temperature detection signal) with the reference voltage. If the water temperature in the water tank is low, the temperature detection signal is smaller than the reference voltage, the operational amplifier U5 outputs a low level, and the heating control circuit receives the signal and starts the electric auxiliary heating device 104.

[0113] From the above, it can be seen that the embodiment improves the precision and stability of temperature detection.

[0114] In one embodiment of the present disclosure, the reference Figure 2 The heating control circuit comprises a triode Q2, a resistor R9, a thyristor Q3, and a relay K1; and the electric auxiliary heating device 104 comprises an electric heating wire U7.

[0115] The base of the triode Q2 is connected to the second end of the temperature detection circuit, the collector of the triode Q2 is connected to the power supply VCC, and the emitter of the triode Q2 is connected to the first end of the resistor R9 and the gate of the thyristor Q3.

[0116] The second end of the resistor R9 is grounded.

[0117] The cathode of the thyristor Q3 is grounded, and the anode of the thyristor Q3 is connected to the first input end of the relay K1.

[0118] The second input end of the relay K1 is connected to the power supply VCC, the common end of the relay K1 is connected to the power supply VCC, and the normally open end of the relay K1 is connected to the first power supply end of the electric heating wire U7.

[0119] The second power supply end of the electric heating wire U7 is grounded.

[0120] In the embodiment, the triode Q2 is NPN type. The triode Q2 receives the signal output by the temperature detection circuit, and when the temperature detection circuit outputs a high level, the triode Q2 is turned on to provide a trigger current for the gate of the thyristor Q3, and the power supply VCC provides current for the relay K1 through the thyristor Q3.

[0121] The relay K1 is an electric control device used to control the on-off of the electric heating wire U7. When the coil of the relay K1 is powered, an electromagnetic force is generated to close the normally open end, thereby connecting the power supply VCC to the electric heating wire U7, and at this time the electric heating wire U7 is powered to generate heat and provide auxiliary heating for the system.

[0122] The resistor R9 functions as a current limiter to limit the current flowing to the gate of the thyristor Q3 when the triode Q2 is turned on, thereby avoiding damage to the thyristor Q3 due to excessive current.

[0123] Specifically, when the temperature detection circuit detects that the water temperature in the solar heat storage water tank 103 is lower than the set value, a high-level signal is output to the base of the triode Q2, and the triode Q2 is turned on. Current flows from the power supply VCC through the resistor R9 and the turned-on triode Q2 to the gate of the thyristor Q3 to trigger the thyristor Q3 to turn on. After the thyristor Q3 is turned on, the power supply VCC supplies power to the coil of the relay K1 through the thyristor, the normally open end of the relay K1 is closed, the electric heating wire U7 is powered to generate heat, and auxiliary heating for the system is started.

[0124] From the above, it can be seen that the heating control circuit realizes precise control of the electric auxiliary heating device 104. The circuit has fast response speed and high stability, and can ensure that the electric heating wire is quickly started or stopped when the temperature detection circuit issues an instruction, thereby effectively regulating the water temperature.

[0125] The above embodiments are only used to illustrate the technical solutions of the present disclosure, but not to limit them; although the foregoing embodiments of the present disclosure have been described in detail, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A solar heating light-sensing backflow control system, characterized by, The application relates to a solar energy collecting device, an electromagnetic valve, a solar energy storage water tank, an electric auxiliary heating device, an electromagnetic valve control module, an illumination detection module and an electric auxiliary heating control module. A first end of the solar energy collecting device is connected with a first end of the solar energy storage water tank through a first pipeline, a second end of the solar energy collecting device is connected with a second end of the solar energy storage water tank through a second pipeline, one end of a third pipeline is connected with the second pipeline, the other end of the third pipeline is connected with a third end of the solar energy storage water tank, and the third pipeline is provided with the electromagnetic valve. A fourth end of the solar energy storage water tank is connected with a water inlet of a user end through a fourth pipeline, the fourth pipeline is provided with the electric auxiliary heating device, and a fifth end of the solar energy storage water tank is connected with a water outlet of the user end through a fifth pipeline. The illumination detection module is configured to detect illumination intensity, and an output end of the illumination detection module is connected with a first end of the electromagnetic valve control module and a control end of the electric auxiliary heating control module respectively, and a second end of the electromagnetic valve control module is used for controlling the electromagnetic valve. A first end of the electric auxiliary heating control module is used for connecting a power supply, a second end of the electric auxiliary heating control module is used for controlling the electric auxiliary heating device, the electric auxiliary heating control module is configured to detect water temperature in the solar energy storage water tank, and the electric auxiliary heating control module controls the electric auxiliary heating device. The illumination detection module comprises a photosensitive resistor U2, an operational amplifier U1, an operational amplifier U3, an operational amplifier U4, a resistor R2, a resistor R5, a resistor R6 and a variable resistor RP2.

2. A solar heating light-sense backflow control system as defined in claim 1, wherein, A first end of the photosensitive resistor U2 is connected with a first end of the resistor R2, an inverting input end of the operational amplifier U1 and a first end of the resistor R5 respectively. A second end of the resistor R2 is grounded. A non-inverting input end of the operational amplifier U1 is used for connecting a reference voltage, and an output end of the operational amplifier U1 is connected with a second end of the photosensitive resistor U2 and a non-inverting input end of the operational amplifier U3 respectively. A second end of the resistor R5 is connected with an inverting input end of the operational amplifier U3, and an output end of the operational amplifier U3 is connected with the inverting input end of the operational amplifier U3 through the resistor R6. An output end of the operational amplifier U3 is connected with an inverting input end of the operational amplifier U4. A non-inverting input end of the operational amplifier U4 is connected with a sliding end of the variable resistor RP2, and an output end of the operational amplifier U4 is connected with a first end of the electromagnetic valve control module. A first end of the variable resistor RP2 is connected with a power supply VCC, and a second end of the variable resistor RP2 is grounded. The illumination detection module further comprises a resistor R1, a sliding resistor RP1 and a stabilizing tube U8.

3. A solar heating light-sense backflow control system as defined in claim 2, wherein, A first end of the non-inverting input end of the operational amplifier U1 and the sliding resistor RP1 is connected with a first end of the resistor R1. A second end of the resistor R1 is grounded. A second end of the sliding resistor RP1 is grounded, and a sliding end of the sliding resistor RP1 is connected with a reference end of the stabilizing tube U8. A cathode of the stabilizing tube U8 is connected with the non-inverting input end of the operational amplifier U1, and an anode of the stabilizing tube U8 is grounded. ​ 4. A solar heating light-sense backflow control system as defined in claim 1, wherein, The electromagnetic valve control module comprises a switch tube Q1; the electromagnetic valve comprises an electromagnetic valve control coil L1; the control end of the switch tube Q1 is connected to the output end of the light detection module; The first end of the switch tube Q1 is connected to the first end of the electromagnetic valve control coil L1, and the second end of the switch tube Q1 is grounded; The second end of the electromagnetic valve control coil L1 is connected to a power supply VCC.

5. A solar heating light-sense backflow control system as defined in claim 1, wherein, The electric auxiliary heating control module comprises a temperature detection circuit and a heating control circuit; The control end of the temperature detection circuit is connected to the output end of the light detection module, the first end of the temperature detection circuit is used for connecting a power supply, the second end of the temperature detection circuit is connected to the first end of the heating control circuit, and the second end of the heating control circuit is used for controlling the electric auxiliary heating device; The temperature detection circuit comprises a transistor Q4, a temperature sensor RT and a resistor R14; The base of the transistor Q4 is connected to the output end of the light detection module, the emitter of the transistor Q4 is connected to a power supply VCC, and the collector of the transistor Q4 is connected to the first end of the temperature sensor RT; The second end of the temperature sensor RT is connected to the first end of the resistor R14; the second end of the temperature sensor RT is connected to the first end of the heating control circuit; The second end of the resistor R14 is grounded; The temperature sensor RT is configured to detect the water temperature in the solar heat storage water tank.

6. A solar heating light-sense backflow control system as defined in claim 5, wherein, The temperature detection circuit further comprises an operational amplifier U6, an operational amplifier U5, a resistor R11, a resistor R13 and a sliding resistor RP3; The non-inverting input end of the operational amplifier U6 is connected to the second end of the temperature sensor RT, and the inverting input end of the operational amplifier U6 is connected to the first end of the resistor R13; The second end of the resistor R13 is grounded; The output end of the operational amplifier U6 is connected to the inverting input end of the operational amplifier U6 through the resistor R11, and the output end of the operational amplifier U6 is connected to the inverting input end of the operational amplifier U5; The non-inverting input end of the operational amplifier U5 is connected to the sliding end of the sliding resistor RP3, and the output end of the operational amplifier U5 is connected to the first end of the heating control circuit; The first end of the sliding resistor RP3 is connected to the collector of the transistor Q4, and the second end of the sliding resistor RP3 is grounded.

7. A solar heating light-sense backflow control system as defined in claim 5, wherein, The heating control circuit comprises a transistor Q2, a resistor R9, a thyristor Q3 and a relay K1; the electric auxiliary heating device comprises an electric heating wire U7; The base of the transistor Q2 is connected to the second end of the temperature detection circuit, the collector of the transistor Q2 is connected to a power supply VCC, and the emitter of the transistor Q2 is connected to the first end of the resistor R9 and the gate of the thyristor Q3 respectively; The second end of the resistor R9 is grounded; The cathode of the thyristor Q3 is grounded, and the anode of the thyristor Q3 is connected to the first input end of the relay K1; The second input end of the relay K1 is connected to a power supply VCC, the common end of the relay K1 is connected to a power supply VCC, and the normally open end of the relay K1 is connected to the first power supply end of the electric heating wire U7; The second power supply end of the electric heating wire U7 is grounded.

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