Automatic control system of solar water heater

Abstract

The utility model discloses an automatic control system of a solar water heater, which comprises a water storage tank and a flat plate heat collection device which are communicated with each other, the water storage tank is arranged on a side wall of a balcony, and the flat plate heat collection device is arranged on a guardrail of the balcony; the lower part of the water storage tank is connected with a water outlet pipeline and a water inlet pipeline, the water outlet pipeline is provided with a water outlet electromagnetic valve, and the water inlet pipeline is provided with a water pump, a flow sensor and a water inlet electromagnetic valve; a liquid level sensor, a temperature sensor and an electric heater are arranged in a cavity of the water storage tank, an illumination sensor is installed on the top of a shell of the water storage tank, and a control box, a solar cell panel and a power module are further arranged on one side of the water storage tank. The flat plate type solar heater is adopted, and installation is convenient. The water suction pump, the electromagnetic valve and the heater are automatically controlled based on the detected water flow signal, the illumination signal, the water feeding level signal and the water temperature signal related to the water heater, wireless control can be adopted, the manual operation process is reduced, and the operation convenience is improved.

Description

Technical field:

[0001] The utility model relates to the technical field of solar water heaters, in particular to an automatic control system for solar water heaters. Background technology:

[0002] Solar water heaters are heating devices that convert sunlight into heat energy, heating water from low temperature to high temperature to meet people's needs for hot water in life and production. Solar water heaters are divided into vacuum tube solar water heaters and flat plate solar water heaters according to their structural form, with vacuum tube solar water heaters being the main type. Vacuum tube household solar water heaters are composed of heat collecting tubes, water storage tanks, brackets and other related parts. The conversion of solar energy into heat energy mainly relies on vacuum heat collecting tubes. Vacuum heat collecting tubes use the principle that hot water floats and cold water sinks to produce microcirculation of water and obtain the required hot water.

[0003] Traditional solar thermal systems cannot meet the needs of individual households. Secondly, the traditional solar water heaters have an integrated design of water tanks and collectors, which are large in size and need to be installed on the roof. Users on some floors cannot make good use of solar energy. Thirdly, the existing solar water heaters require users to operate them on site in real time, whether it is water supply and heating, etc., which is not convenient enough and has a low degree of intelligence, and cannot meet people's growing user experience needs. Utility model content:

[0004] The utility model aims to provide an automatic control system for a solar water heater to solve the deficiencies of the prior art.

[0005] The utility model is implemented by the following technical scheme: an automatic control system for a solar water heater, comprising a water storage tank and a flat plate heat collecting device, wherein the water storage tank is installed on the side wall of a balcony, and the flat plate heat collecting device is installed on the guardrail of the balcony; an upper copper row pipe and a lower copper row pipe are respectively arranged at the upper and lower ends of the flat plate heat collecting device, wherein the upper copper row pipe and the lower copper row pipe are connected through a plurality of heat collecting tubes, wherein the upper copper row pipe is connected to a medium input port of the water storage tank through a medium output pipe, and the lower copper row pipe is connected to a medium output port of the water storage tank through a medium input pipe;

[0006] The lower part of the water storage tank is connected to a water outlet pipeline and a water inlet pipeline, a water outlet solenoid valve is arranged on the water outlet pipeline, and a water pump, a flow sensor and a water inlet solenoid valve are arranged on the water inlet pipeline;

[0007] A liquid level sensor, a temperature sensor, and an electric heater are arranged in the cavity of the water tank, a light sensor is installed on the top of the water tank shell, and a control box, a solar panel, and a power module are also arranged on one side of the water tank;

[0008] The control box is provided with a control circuit board, which includes a microprocessor and a power module electrically connected to the microprocessor, a water pump drive circuit, a solenoid valve drive circuit, a heating control switch, a wireless communication module, and a voice module. The water pump drive circuit is electrically connected to the water pump, the solenoid valve drive circuit is electrically connected to the water inlet solenoid valve and the water outlet solenoid valve, the heating control switch is electrically connected to the electric heater, the microprocessor is also electrically connected to the flow sensor, the touch screen, the light sensor, the liquid level sensor, and the temperature sensor, and the power module is electrically connected to the solar panel.

[0009] Furthermore, a heat-insulating layer is provided inside the water tank shell.

[0010] Furthermore, an exhaust hole is provided on the upper portion of the water tank shell, and the exhaust hole is sealed by an end cover.

[0011] Furthermore, the water pump driving circuit and the heating control switch are DC-controlled AC relays.

[0012] Furthermore, the solenoid valve driving circuit is an electromagnetic driving circuit based on Darlington transistor driving control.

[0013] Furthermore, the wireless communication module is a 4G / 5G wireless communication module.

[0014] Furthermore, the power module includes a battery and a DC regulated power supply electrically connected to the battery.

[0015] Furthermore, the electric heater is an AC heating tube.

[0016] Advantages of the utility model:

[0017] The utility model adopts a flat-plate solar heater, which is easy to install. Based on the flow sensor, light sensor, liquid level sensor, and temperature sensor to detect the water flow signal, light signal, water level signal, and water temperature signal related to the water heater, the water pump, solenoid valve, and heater can be automatically controlled based on these signals, and wireless control can be used to reduce the manual operation process and improve the convenience of operation. In addition, the solar panel can provide backup power for the control box and solenoid valve, heating wire, water pump, etc. to avoid the solar water heater being unable to be used due to a power outage. Description of the drawings:

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structure of an automatic control system for a solar water heater according to an embodiment of the utility model;

[0020] Figure 2 This is a block diagram of the electric control principle of an automatic control system for a solar water heater according to an embodiment of the utility model;

[0021] Figure 3 The present invention is a schematic diagram of a solenoid valve driving circuit of an automatic control system for a solar water heater according to an embodiment of the present invention. Specific implementation method:

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1 , 2 As shown, an automatic control system for a solar water heater comprises a water tank 1 and a flat plate heat collecting device 2, wherein the water tank 1 is mounted on the side wall of a balcony, and the flat plate heat collecting device 2 is mounted on the guardrail of the balcony; an upper copper row pipe 3 and a lower copper row pipe 4 are respectively arranged at the upper and lower ends of the flat plate heat collecting device 2, wherein the upper copper row pipe 3 and the lower copper row pipe 4 are connected via a plurality of heat collecting tubes 5, the upper copper row pipe 3 is connected to a medium input port of the water tank 1 via a medium output pipe 7, and the lower copper row pipe 4 is connected to a medium output port of the water tank 1 via a medium input pipe 6;

[0024] The lower part of the water storage tank 1 is connected to a water outlet pipeline 9 and a water inlet pipeline 10. The water outlet pipeline 9 is provided with a water outlet solenoid valve 14, and the water inlet pipeline 10 is provided with a water pump 11, a flow sensor 12 and a water inlet solenoid valve 13;

[0025] A liquid level sensor 19, a temperature sensor 20, and an electric heater 21 are arranged in the cavity 22 of the water storage tank 1. A light sensor 18 is installed on the top of the shell of the water storage tank 1. A control box 8, a solar panel 16, and a power module 17 are also arranged on one side of the water storage tank 1.

[0026] The control box 8 is provided with a control circuit board, which includes a microprocessor 26 and a power module 17 electrically connected to the microprocessor 26, a water pump drive circuit 27, a solenoid valve drive circuit 28, a heating control switch 29, a wireless communication module 30, and a voice module 31. The water pump drive circuit 27 is electrically connected to the water pump 11, the solenoid valve drive circuit 28 is electrically connected to the water inlet solenoid valve 13 and the water outlet solenoid valve 14, the heating control switch 29 is electrically connected to the electric heater 21, the microprocessor 26 is also electrically connected to the flow sensor 12, the touch screen 15, the light sensor 18, the liquid level sensor 19, and the temperature sensor 20, and the power module 17 is electrically connected to the solar panel 16.

[0027] A heat-insulating layer 25 is provided inside the shell of the water tank 1 to prevent the heat of the heated water from being lost through the shell of the water tank.

[0028] The upper part of the water storage tank 1 shell is also provided with an exhaust hole 23, and the exhaust hole 23 is sealed by an end cap 24. The solar water heater is an environmentally friendly, energy-saving and durable water heater that uses solar energy to turn cold water into hot water. During the natural circulation process of the solar water heater, the heat energy of the solar energy causes the water to expand, which will cause the water and gas to enter the solar water heater together. The presence of gas will increase the working pressure of the solar water heater, affect the flow of water in and out, and affect the stability of the system. The function of the exhaust port of the solar water heater is to discharge the gas generated in the system normally, avoid oxygen blockage, and make the solar water heater work normally.

[0029] The water pump driving circuit 27 and the heating control switch 29 are DC-controlled AC relays. For example, the SSR-40DA series relays are used, whose input voltage is 3-32V DC voltage and output voltage is 24-380V AC voltage. Therefore, their input voltage meets the output voltage range of the microprocessor 26 (single-chip microcomputer), and the load water pump or heating tube driven by them also meets the output voltage range.

[0030] like Figure 3 As shown, the solenoid valve drive circuit 28 is an electromagnetic drive circuit based on Darlington tube drive control. The Darlington tube has a high current amplification capability and a low output resistance. It can drive the water inlet solenoid valve 13 and the water outlet solenoid valve 14 to switch after amplification according to the control signal output by the single-chip microcomputer.

[0031] The wireless communication module 30 is a 4G / 5G wireless communication module, which is used to wirelessly send information such as the hot water temperature, liquid level, water inlet pipe flow and light of the water heater to the user's mobile phone for remote monitoring. The user's mobile phone can also control the solenoid valve, water pump, etc. through it.

[0032] The power module 17 includes a battery and a DC regulated power supply electrically connected to the battery. The battery is used to store the electric energy converted by the solar panel and convert the voltage of the battery into the voltage required by the various components of the control box, such as 5V, 12V, etc., through the DC regulated power supply.

[0033] The electric heater 21 is an AC electric heating tube, which is used to heat the water in the water tank under the control of the control box when the light energy is not good on rainy days.

[0034] The working principle of the utility model is:

[0035] The solar water heater of the utility model comprises a water storage tank 1 and a flat plate heat collecting device 2. The water storage tank 1 is installed on the side wall of the balcony, and the flat plate heat collecting device 2 is installed on the guardrail of the balcony. After the water storage tank 1 is filled with water, the cold water is transported to the flat plate heat collecting device 2 through the medium input pipe 6 for solar heating, and the heated water flows into the water storage tank 1 through the medium output pipe 7.

[0036] A temperature sensor 20 is set in the water tank 1 to detect the water temperature, a liquid level sensor 19 is set to detect the water level, and an electric heater 21 is set to provide auxiliary heating when the solar energy is poor on cloudy days. The light sensor 18 is used to detect the light intensity. If the light intensity is insufficient, the electric heater 21 is automatically started for auxiliary heating.

[0037] The lower part of the water storage tank 1 is connected to a water outlet pipe 9 and a water inlet pipe 10. The water inlet pipe 10 is used to add water to the water storage tank 1, and the water outlet pipe 9 is used to flow out warm water for bathing, washing and other domestic water. A water outlet solenoid valve 14 is provided on the water outlet pipe 9 to control the opening and closing of the water outlet; a water pump 11, a flow sensor 12 and a water inlet solenoid valve 13 are provided on the water inlet pipe 10. The water pump 11 is used to pump water when adding water, the flow sensor 12 is used to detect the water addition flow, and the water inlet solenoid valve 13 is used to control the opening and closing of the water inlet.

[0038] like Figure 2 As shown, the detection signals of the above flow sensor 12, light sensor 18, liquid level sensor 19, and temperature sensor 20 are all sent to the microprocessor 26. The microprocessor adopts a single-chip microcomputer. The microprocessor controls the water pump 11, the solenoid valve, and the heater according to the signal conditions. For example, when the light is insufficient, the microprocessor automatically assists in heating; when the water inlet flow is insufficient, the water pump is automatically turned off to avoid idling; when the liquid level sensor detects that the water level is in place after adding water, the water pump and the water inlet solenoid valve are automatically controlled to be closed; when hot water is needed, the water outlet solenoid valve is controlled to open.

[0039] The wireless communication module 30 is a 4G / 5G wireless communication module, which is used to wirelessly send information such as the hot water temperature, liquid level, water inlet pipe flow and light of the water heater to the user's mobile phone for remote monitoring. The user's mobile phone can also control the solenoid valve, water pump, etc. through it.

[0040] In addition, the solar panel can provide backup power for the control box and the solenoid valve, the heating wire, the water pump, etc., to avoid the solar water heater being unusable due to a power outage. When the water is full or the water temperature exceeds a certain threshold, a voice prompt can be given through the voice module 31.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A solar water heater automatic control system, characterized in that: The invention comprises a water storage tank (1) and a flat plate heat collecting device (2), wherein the water storage tank (1) is installed on the side wall of a balcony, and the flat plate heat collecting device (2) is installed on the guardrail of the balcony; an upper copper row pipe (3) and a lower copper row pipe (4) are respectively provided at the upper and lower ends of the flat plate heat collecting device (2); the upper copper row pipe (3) and the lower copper row pipe (4) are connected via a plurality of heat collecting tubes (5); the upper copper row pipe (3) is connected to the medium input port of the water storage tank (1) via a medium output pipe (7), and the lower copper row pipe (4) is connected to the medium output port of the water storage tank (1) via a medium input pipe (6); The lower part of the water storage tank (1) is connected to a water outlet pipeline (9) and a water inlet pipeline (10); a water outlet solenoid valve (14) is arranged on the water outlet pipeline (9); and a water pump (11), a flow sensor (12) and a water inlet solenoid valve (13) are arranged on the water inlet pipeline (10); A liquid level sensor (19), a temperature sensor (20), and an electric heater (21) are arranged in the cavity (22) of the water storage tank (1); a light sensor (18) is installed on the top of the shell of the water storage tank (1); and a control box (8), a solar panel (16), and a power module (17) are also arranged on one side of the water storage tank (1); The control box (8) is provided with a control circuit board, the control circuit board comprising a microprocessor (26) and a power module (17) electrically connected to the microprocessor (26), a water pump drive circuit (27), a solenoid valve drive circuit (28), a heating control switch (29), a wireless communication module (30), and a voice module (31); the water pump drive circuit (27) is electrically connected to the water pump (11); the solenoid valve drive circuit (28) is electrically connected to the water inlet solenoid valve (13) and the water outlet solenoid valve (14); the heating control switch (29) is electrically connected to the electric heater (21); the microprocessor (26) is also electrically connected to the flow sensor (12), the touch screen (15), the light sensor (18), the liquid level sensor (19), and the temperature sensor (20); and the power module (17) is electrically connected to the solar panel (16).

2. A solar water heater automatic control system according to claim 1, characterized in that: A heat-insulating layer (25) is provided inside the shell of the water storage tank (1).

3. A solar water heater automatic control system according to claim 1, characterized in that: The upper part of the shell of the water storage tank (1) is also provided with an exhaust hole (23), and the exhaust hole (23) is sealed by an end cover (24).

4. A solar water heater automatic control system according to claim 1, characterized in that: The water pump driving circuit (27) and the heating control switch (29) are direct current controlling alternating current relays.

5. The automatic control system of a solar water heater according to claim 1, characterized in that: The electromagnetic valve driving circuit (28) is an electromagnetic driving circuit based on Darlington tube driving control.

6. A solar water heater automatic control system according to claim 1, characterized in that: The wireless communication module (30) is a 4G / 5G wireless communication module.

7. The automatic control system of a solar water heater according to claim 1, characterized in that: The power module (17) comprises a battery and a DC regulated power supply electrically connected to the battery.

8. The automatic control system of a solar water heater according to claim 1, characterized in that: The electric heater (21) is an AC electric heating tube.

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