Solar heat tracing heat preservation hot water control system and application method

Abstract

The invention relates to the technical field of solar energy application, in particular to a solar heat tracing heat preservation hot water control system and an application method. The system comprises a solar heat collector, a heat tracing heat preservation assembly and a hot water control assembly. The heat tracing heat preservation assembly comprises a heating medium circulating pipe, a first electromagnetic valve, a water segregator, a heat tracing circulating pipe, a water collector, a first temperature measuring probe, a first circulating pump and a second electromagnetic valve. The two ends of the heating medium circulating pipe communicate with an outlet and an inlet of the solar heat collector correspondingly. In the flowing direction of a heating medium, the first electromagnetic valve, the water segregator, the heat tracing circulating pipe, the water collector, the first temperature measuring probe, the first circulating pump and the second electromagnetic valve are sequentially arranged on the heating medium circulating pipe. The hot water control assembly comprises a hot water storage tank, a second temperature measuring probe, a heating medium heat exchange pipeline and a third electromagnetic valve. According to the application method, heat is transferred to the water supply and drainage pipeline through the system, icing spalling is avoided, meanwhile, hot water is prepared for indirect heat exchange of the heat storage water tank, solar energy is fully utilized, and energy conservation and environment protection are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of solar energy applications, and particularly to a solar-assisted heat tracing and heat preservation hot water control system and an application method thereof. Background Art

[0002] In winter, the weather is cold, which easily causes the water in the water supply and drainage pipes to freeze, and then causes the water supply and drainage pipes to burst, affecting normal use. To avoid the freezing of the water supply and drainage pipes, it is necessary to perform heat tracing and heat preservation treatment on the pipes.

[0003] The existing heat tracing and heat preservation methods generally use electric heat tracing tapes for heat tracing. The electric heat tracing tapes are resistance wire heat tracing tapes, which are laid along the water supply and drainage pipes, and have the advantages of convenient construction and installation and good heat tracing effect. However, the electric heat tracing tapes consume a large amount of electricity and are not energy-efficient enough. In addition, the service life of the electric heat tracing tapes is about 5-8 years, and there is a fire hazard after aging.

[0004] In summary, it is necessary to develop a solar-assisted heat tracing and heat preservation hot water control system and an application method to solve the problems of large power consumption, short service life, and fire hazard after aging of the electric heat tracing tapes in the prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide a solar-assisted heat tracing and heat preservation hot water control system and an application method thereof. The specific technical solutions are as follows:

[0006] In the first aspect, the present invention provides a solar-assisted heat tracing and heat preservation hot water control system, which includes a solar collector, a heat tracing and heat preservation component, and a hot water control component;

[0007] The heat tracing and heat preservation component includes a heat medium circulation pipe, a first solenoid valve, a water distributor, a heat tracing circulation pipe, a water collector, a first temperature measuring probe, a first circulation pump, and a second solenoid valve; one end of the heat medium circulation pipe is a heat medium inlet end, which is communicated with the outlet of the solar collector, and the other end is a heat medium outlet end, which is communicated with the inlet of the solar collector; in the flowing direction of the heat medium, the first solenoid valve, the water distributor, the heat tracing circulation pipe, the water collector, the first temperature measuring probe, the first circulation pump, and the second solenoid valve are sequentially arranged on the heat medium circulation pipe;

[0008] The hot water control assembly includes a hot water storage tank, a second temperature measuring probe, a heat medium heat exchange pipeline, and a third solenoid valve; the hot water storage tank is connected to a water-using facility through a hot water supply pipe; the second temperature measuring probe is connected to the hot water storage tank; the heat medium inlet end of the heat medium heat exchange pipeline communicates with the heat medium circulation pipe located between the outlet of the solar collector and the first solenoid valve, and its heat medium outlet end communicates with the heat medium circulation pipe located between the first temperature measuring probe and the first circulation pump; the heat medium heat exchange pipeline includes a main heat exchange pipeline provided between its heat medium inlet end and heat medium outlet end, and the main heat exchange pipeline is arranged in the hot water storage tank; the third solenoid valve is arranged on the heat medium heat exchange pipeline and is located between its heat medium outlet end and its main heat exchange pipeline.

[0009] Optionally, the heat tracing and heat preservation assembly further includes an auxiliary heat tracing and heat preservation pipeline, a fourth solenoid valve, and a second circulation pump; the heat medium inlet end of the auxiliary heat tracing and heat preservation pipeline communicates with the heat medium circulation pipe and is located between the first temperature measuring probe and the heat medium outlet end of the heat medium heat exchange pipeline, the heat medium outlet end of the auxiliary heat tracing and heat preservation pipeline communicates with the heat medium heat exchange pipeline and is located between the third solenoid valve and the main heat exchange pipeline; the fourth solenoid valve and the second circulation pump are arranged on the auxiliary heat tracing and heat preservation pipeline.

[0010] Optionally, the hot water control assembly includes an electric heating component; the electric heating component is arranged on the hot water storage tank and is connected to a power supply.

[0011] Optionally, the solar heat tracing and heat preservation hot water control system further includes a third temperature measuring probe; the third temperature measuring probe is arranged on the heat medium circulation pipe and is located between the heat medium inlet end of the heat medium heat exchange pipeline and the first solenoid valve.

[0012] Optionally, the hot water storage tank includes a water inlet, a water outlet, and a water return port, the water inlet is connected to a cold water supply pipe, the water outlet is connected to the hot water supply pipe, the water return port is connected to the hot water return pipe; a third circulation pump is arranged on the hot water supply pipe; the hot water return pipe communicates with the hot water supply pipe; the cold water supply pipe communicates with the water collector.

[0013] Optionally, the solar heat tracing and heat preservation hot water control system further includes a fourth temperature measuring probe; the fourth temperature measuring probe is arranged on the hot water supply pipe.

[0014] Optionally, the solar heat tracing and heat preservation hot water control system further includes a PLC controller; the PLC controller is connected to the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the first circulation pump, the second circulation pump, the third circulation pump, the first temperature measuring probe, the second temperature measuring probe, the third temperature measuring probe, the fourth temperature measuring probe and the electric heating component.

[0015] Optionally, the solar heat tracing and heat preservation hot water control system further includes a plurality of automatic exhaust valves, a plurality of check valves, a plurality of heat medium expansion tanks, a plurality of drain valves and a plurality of stop valves;

[0016] The automatic exhaust valves are arranged on both the water distributor and the water collector;

[0017] The check valves are arranged on the heat medium heat exchange pipeline, and are located between the heat medium outlet end of the heat medium heat exchange pipeline and the third solenoid valve; the check valves are arranged on the heat medium circulation pipe, and are respectively located between the heat medium inlet end of the auxiliary heat tracing and heat preservation pipeline and the heat medium outlet end of the heat medium heat exchange pipeline, and between the third temperature measuring probe and the heat medium inlet end of the heat medium heat exchange pipeline; the check valves are arranged on the auxiliary heat tracing and heat preservation pipeline;

[0018] The heat medium expansion tanks are arranged on both the heat medium heat exchange pipeline and the heat medium circulation pipe;

[0019] The drain valves are arranged on both the hot water return pipe and the heat medium circulation pipe;

[0020] The stop valves are arranged on the heat medium circulation pipe, and are located between the first solenoid valve and the water distributor; the stop valves are arranged on the heat tracing circulation pipe.

[0021] In a second aspect, the present invention provides an application method of the solar heat tracing and heat preservation hot water control system under the condition of sufficient sunlight during the day (i.e., the sunshine duration is greater than or equal to 4h), which includes the following steps:

[0022] Step A1: Open the first solenoid valve, the second solenoid valve and the first circulation pump, close the third solenoid valve, and the heat medium heated by the solar collector passes through the water distributor, the heat tracing circulation pipe and the water collector in sequence along the heat medium circulation pipe to realize heat tracing and heat preservation of the water supply and drainage pipeline;

[0023] Step A2: When the heat medium temperature measured by the first temperature measuring probe is greater than or equal to 35°C, close the first solenoid valve, open the third solenoid valve, the second solenoid valve and the first circulation pump. The heat medium heated by the solar collector heats the cold water in the hot water storage tank along the heat medium heat exchange pipeline to form hot water, and then supplies hot water to the user through the hot water supply pipe and the water using facilities;

[0024] Step A3: When the hot water temperature measured by the second temperature measuring probe is greater than or equal to 70°C, close the second solenoid valve and the first circulation pump to stop the heat medium circulation in the hot water storage tank; As the hot water in the hot water storage tank is gradually used, at the same time, cold water is gradually injected into the hot water storage tank. When the hot water temperature measured by the second temperature measuring probe is less than or equal to 55°C, reopen the second solenoid valve and the first circulation pump, and the heat medium continues to heat the cold water in the hot water storage tank along the heat medium heat exchange pipeline to form hot water;

[0025] Step A4: When the heat medium temperature measured by the first temperature measuring probe is less than or equal to 15°C, operate according to Step A1; Step A5: Operate in a cycle in the order of Step A2, Step A3, Step A4, Step A1 to Step A2.

[0026] In the third aspect, the present invention provides an application method of the solar-assisted heat tracing and heat preservation hot water control system in night and rainy weather, which includes the following steps:

[0027] When the difference between the temperature measured by the third temperature measuring probe and the temperature measured by the second temperature measuring probe is less than 5°C, close the second solenoid valve and the first circulation pump to stop the heat medium circulation in the hot water storage tank;

[0028] When the temperature measured by the second temperature measuring probe is greater than or equal to 17°C and the temperature measured by the first temperature measuring probe is less than or equal to 15°C, open the first solenoid valve, the fourth solenoid valve and the second circulation pump. At this time, the heat medium heated by the hot water storage tank passes through the water distributor, the heat tracing circulation pipe and the water collector in sequence along the heat medium circulation pipe to realize heat tracing and heat preservation of the water supply and drainage pipes; When the heat medium temperature measured by the first temperature measuring probe is greater than or equal to 35°C, close the first solenoid valve to stop the heat medium circulation; When the heat medium temperature measured by the first temperature measuring probe is less than or equal to 15°C, reopen the first solenoid valve to continue the heat medium circulation;

[0029] When the temperature measured by the second temperature measuring probe is less than or equal to 10°C, turn on the electric heating component to heat the cold water in the hot water storage tank to form hot water; when the hot water temperature measured by the second temperature measuring probe is greater than or equal to 50°C, turn off the electric heating component; turn on the first solenoid valve, the fourth solenoid valve and the second circulation pump. At this time, the heat medium heated by the hot water storage tank passes through the water distributor, the tracing circulation pipe and the water collector along the heat medium circulation pipe in sequence, realizing the tracing and heat preservation of the water supply and drainage pipes; when the heat medium temperature measured by the first temperature measuring probe is greater than or equal to 35°C, turn off the first solenoid valve and stop the heat medium circulation; when the heat medium temperature measured by the first temperature measuring probe is less than or equal to 15°C, turn on the first solenoid valve again and continue the heat medium circulation.

[0030] Applying the technical solution of the present invention has at least the following beneficial effects:

[0031] (1) A solar tracing and heat preservation hot water control system and application method provided by the present invention can solve the problems of large power consumption, short service life and potential fire hazards after aging of the electric tracing belt in the prior art. Specifically, under the condition of sufficient sunlight during the day, the present invention uses a solar collector to heat the heat medium, and the water supply and drainage pipes are traced with the heat medium through the water distributor, the tracing circulation pipe and the water collector, transferring the heat of the heat medium to the water supply and drainage pipes to prevent them from freezing and bursting. At the same time, the heat medium can indirectly exchange heat for the hot water storage tank to prepare hot water, making full use of solar energy, saving energy and being environmentally friendly, and can solve the problems of large power consumption, short service life and potential fire hazards after aging of the electric tracing belt in the prior art. In addition, the present invention can realize solar tracing and heat preservation and hot water control by adding the heat medium, and the heat medium is antifreeze, which is cheap, easy to obtain, economical and environmentally friendly.

[0032] (2) A solar tracing and heat preservation hot water control system and application method provided by the present invention can also transfer the heat of the heat medium to the water supply and drainage pipes at night and on rainy and cloudy days with the help of the auxiliary tracing and heat preservation pipeline, the fourth solenoid valve, the second circulation pump and the electric heating component to prevent them from freezing and bursting.

[0033] In addition to the purposes, features and advantages described above, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0035] Figure 1 is a schematic structural diagram of a solar tracing and heat preservation hot water control system in an embodiment;

[0036] Among them, 1. solar collector, 2. heat medium circulation pipe, 3. first solenoid valve, 4. water distributor, 5. tracing circulation pipe, 6. water collector, 7. first temperature measuring probe, 8. first circulation pump, 9. second solenoid valve, 10. hot water storage tank, 11. second temperature measuring probe, 12. heat medium heat exchange pipeline, 13. third solenoid valve, 14. auxiliary tracing and heat preservation pipeline, 15. fourth solenoid valve, 16. second circulation pump, 17. electric heating component, 18. third temperature measuring probe, 19. cold water supply pipe, 20. hot water supply pipe, 21. hot water return pipe, 22. fourth temperature measuring probe, 23. automatic air vent valve, 24. check valve, 25. heat medium expansion tank, 26. drain valve, 27. stop valve, 28. third circulation pump, A. water using facility. Specific implementation manner

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

[0038] Embodiment:

[0039] See Figure 1 , a solar tracing and heat preservation hot water control system, including a solar collector 1, a tracing and heat preservation component and a hot water control component;

[0040] The tracing and heat preservation component includes a heat medium circulation pipe 2, a first solenoid valve 3, a water distributor 4, a tracing circulation pipe 5, a water collector 6, a first temperature measuring probe 7, a first circulation pump 8 and a second solenoid valve 9; one end of the heat medium circulation pipe 2 is a heat medium inlet end and is communicated with the outlet of the solar collector 1, and the other end is a heat medium outlet end and is communicated with the inlet of the solar collector 1; in the flowing direction of the heat medium, the first solenoid valve 3, the water distributor 4, the tracing circulation pipe 5, the water collector 6, the first temperature measuring probe 7, the first circulation pump 8 and the second solenoid valve 9 are sequentially arranged on the heat medium circulation pipe 2;

[0041] The hot water control assembly includes a hot water storage tank 10, a second temperature measuring probe 11, a heat medium heat exchange pipeline 12, and a third solenoid valve 13; the hot water storage tank 10 is connected to a water-using facility A through a hot water supply pipe 20; the second temperature measuring probe 11 is connected to the hot water storage tank 10; the heat medium inlet end of the heat medium heat exchange pipeline 12 is communicated with the heat medium circulation pipe 2 located between the outlet of the solar collector 1 and the first solenoid valve 3, and its heat medium outlet end is communicated with the heat medium circulation pipe 2 located between the first temperature measuring probe 7 and the first circulation pump 8; the heat medium heat exchange pipeline 12 includes a main heat exchange pipeline arranged between its heat medium inlet end and heat medium outlet end, and the main heat exchange pipeline is arranged in the hot water storage tank 10; the third solenoid valve 13 is arranged on the heat medium heat exchange pipeline 12 and is located between its heat medium outlet end and its main heat exchange pipeline.

[0042] The heat tracing and heat preservation assembly further includes an auxiliary heat tracing and heat preservation pipeline 14, a fourth solenoid valve 15, and a second circulation pump 16; the heat medium inlet end of the auxiliary heat tracing and heat preservation pipeline 14 is communicated with the heat medium circulation pipe 2 and is located between the first temperature measuring probe 7 and the heat medium outlet end of the heat medium heat exchange pipeline 12, and the heat medium outlet end of the auxiliary heat tracing and heat preservation pipeline 14 is communicated with the heat medium heat exchange pipeline 12 and is located between the third solenoid valve 13 and the main heat exchange pipeline; the fourth solenoid valve 15 and the second circulation pump 16 are arranged on the auxiliary heat tracing and heat preservation pipeline 14.

[0043] The hot water control assembly includes an electric heating component 17 (such as an electric heating pipe); the electric heating component 17 is arranged on the hot water storage tank 10 and is connected to a power supply, and is used for heating the cold water in the hot water storage tank 10 to form hot water at night and on rainy and cloudy days, and realizing heat tracing and heat preservation for the water supply and drainage pipelines through the heat medium heated by the hot water storage tank 10.

[0044] The solar energy heat tracing and heat preservation hot water control system further includes a third temperature measuring probe 18; the third temperature measuring probe 18 is arranged on the heat medium circulation pipe 2 and is located between the heat medium inlet end of the heat medium heat exchange pipeline 12 and the first solenoid valve 3.

[0045] The hot water storage tank 10 includes a water inlet, a water outlet, and a water return port. The water inlet is connected to a cold water supply pipe 19, the water outlet is connected to the hot water supply pipe 20, and the water return port is connected to the hot water return pipe 21; a third circulation pump 28 is arranged on the hot water supply pipe 20; the hot water return pipe 21 is communicated with the hot water supply pipe 20. The cold water supply pipe 19 is communicated with the water collector 6, so that the water in the cold water supply pipe 19 is the water after heat tracing and heat preservation by the heat medium, avoiding the problem that the cold water supply pipe 19 is frozen and cracked due to too low water temperature in the cold water supply pipe 19.

[0046] The solar heat tracing and heat preservation hot water control system further includes a fourth temperature measuring probe 22; the fourth temperature measuring probe 22 is arranged on the hot water supply pipe 20. When the difference between the temperature measured by the second temperature measuring probe 11 and the temperature measured by the fourth temperature measuring probe 22 is less than or equal to 5°C, the third circulation pump 28 is turned on to realize the flow of hot water in the hot water storage tank 10 between the hot water supply pipe 20 and the hot water return pipe 21, so as to improve the hot water outlet efficiency and provide a better water use experience.

[0047] The solar heat tracing and heat preservation hot water control system further includes a PLC controller (not shown in the figure); the PLC controller is connected to the first solenoid valve 3, the second solenoid valve 9, the third solenoid valve 13, the fourth solenoid valve 15, the first circulation pump 8, the second circulation pump 16, the third circulation pump 28, the first temperature measuring probe 7, the second temperature measuring probe 11, the third temperature measuring probe 18, the fourth temperature measuring probe 22 and the electric heating component 17, which is convenient for realizing intelligent heat tracing and heat preservation and hot water control.

[0048] The solar heat tracing and heat preservation hot water control system further includes a plurality of (specifically two) automatic exhaust valves 23, a plurality of (specifically four) check valves 24, a plurality of (specifically two) heat medium expansion tanks 25, a plurality of (specifically two) drain valves 26 and a plurality of stop valves 27;

[0049] The automatic exhaust valves 23 are arranged on both the water distributor 4 and the water collector 6, which are used to maintain the air pressure balance in the water distributor 4 and the water collector 6 and ensure the normal operation of the system;

[0050] The check valves 24 are arranged on the heat medium heat exchange pipeline 12 and are located between the heat medium outlet end of the heat medium heat exchange pipeline 12 and the third solenoid valve 13; the check valves 24 are arranged on the heat medium circulation pipe 2 and are respectively located between the heat medium inlet end of the auxiliary heat tracing and heat preservation pipeline 14 and the heat medium outlet end of the heat medium heat exchange pipeline 12, and between the third temperature measuring probe 18 and the heat medium inlet end of the heat medium heat exchange pipeline 12; the check valves 24 are arranged on the auxiliary heat tracing and heat preservation pipeline 14; the check valves 24 are used to prevent the heat medium from flowing back;

[0051] The heat medium expansion tanks 25 are arranged on both the heat medium heat exchange pipeline 12 and the heat medium circulation pipe 2 to reduce the influence of the heat medium's thermal expansion;

[0052] The drain valves 26 are arranged on both the hot water return pipe 21 and the heat medium circulation pipe 2, which is convenient for updating the hot water and the heat medium and overhauling the pipeline;

[0053] A stop valve 27 is provided on the heat medium circulation pipe 2 and is located between the first solenoid valve 3 and the water distributor 4, facilitating timely on-off of the heat medium and pipeline maintenance; a stop valve 27 is provided on the tracing circulation pipe 5, facilitating timely on-off of the heat medium and pipeline maintenance.

[0054] The application method of the solar tracing and heat preservation hot water control system under the condition of sufficient sunlight during the day (i.e., the sunshine duration is greater than or equal to 4h) includes the following steps:

[0055] Step A1: Open the first solenoid valve 3, the second solenoid valve 9 and the first circulation pump 8, close the third solenoid valve 13, and the heat medium heated by the solar collector 1 flows along the heat medium circulation pipe 2 through the water distributor 4, the tracing circulation pipe 5 and the water collector 6 in sequence to realize tracing and heat preservation of the water supply and drainage pipeline;

[0056] Step A2: When the temperature of the heat medium measured by the first temperature measuring probe 7 is greater than or equal to 35°C, close the first solenoid valve 3, open the third solenoid valve 13, the second solenoid valve 9 and the first circulation pump 8, and the heat medium heated by the solar collector 1 heats the cold water in the hot water storage tank 10 along the heat medium heat exchange pipeline 12 to form hot water, and then supplies it to users through the hot water supply pipe 20 and the water using facility A;

[0057] Step A3: When the temperature of the hot water measured by the second temperature measuring probe 11 is greater than or equal to 70°C, close the second solenoid valve 9 and the first circulation pump 8, and stop the heat medium circulation in the hot water storage tank 10; as the hot water in the hot water storage tank 10 is gradually used, at the same time, cold water is gradually injected into the hot water storage tank 10. When the temperature of the hot water measured by the second temperature measuring probe 11 is less than or equal to 55°C, reopen the second solenoid valve 9 and the first circulation pump 8, and the heat medium continues to heat the cold water in the hot water storage tank 10 along the heat medium heat exchange pipeline 12 to form hot water;

[0058] Step A4: When the temperature of the heat medium measured by the first temperature measuring probe 7 is less than or equal to 15°C, operate according to Step A1; Step A5: Operate in a cycle in the order of Step A2, Step A3, Step A4, Step A1 to Step A2.

[0059] It can be seen that under the condition of sufficient sunlight during the day, in this embodiment, the solar collector 1 is used to heat the heat medium, and the water supply and drainage pipes are heated by the heat medium through the water distributor 4, the tracing circulation pipe 5 and the water collector 6, and the heat of the heat medium is transferred to the water supply and drainage pipes to prevent them from freezing and cracking. At the same time, the heat medium can indirectly exchange heat for the hot water storage tank 10 to prepare hot water, making full use of solar energy, saving energy and being environmentally friendly, and being able to solve the problems of large power consumption, short service life and potential fire hazards after aging of the electric tracing belt in the prior art. In addition, the present invention can achieve solar tracing heat preservation and hot water control by adding the heat medium, and the heat medium is antifreeze, which is cheap, easily available, economical and environmentally friendly.

[0060] The application method of the solar tracing heat preservation hot water control system at night and on rainy and cloudy days includes the following steps:

[0061] When the difference between the temperature measured by the third temperature measuring probe 18 and the temperature measured by the second temperature measuring probe 11 is less than 5°C, the second solenoid valve 9 and the first circulation pump 8 are closed, and the circulation of the heat medium in the hot water storage tank 10 is stopped;

[0062] When the temperature measured by the second temperature measuring probe 11 is greater than or equal to 17°C and the temperature measured by the first temperature measuring probe 7 is less than or equal to 15°C, the first solenoid valve 3, the fourth solenoid valve 15 and the second circulation pump 16 are opened. At this time, the heat medium heated by the hot water storage tank 10 passes through the water distributor 4, the tracing circulation pipe 5 and the water collector 6 along the heat medium circulation pipe 2 in sequence to realize the tracing heat preservation of the water supply and drainage pipes; when the heat medium temperature measured by the first temperature measuring probe 7 is greater than or equal to 35°C, the first solenoid valve 3 is closed to stop the heat medium circulation; when the heat medium temperature measured by the first temperature measuring probe 7 is less than or equal to 15°C, the first solenoid valve 3 is opened again to continue the heat medium circulation;

[0063] When the temperature measured by the second temperature measuring probe 11 is less than or equal to 10°C, the electric heating component 17 is turned on to heat the cold water in the hot water storage tank 10 to form hot water; when the hot water temperature measured by the second temperature measuring probe 11 is greater than or equal to 50°C, the electric heating component 17 is turned off; the first solenoid valve 3, the fourth solenoid valve 15 and the second circulation pump 16 are opened. At this time, the heat medium heated by the hot water storage tank 10 passes through the water distributor 4, the tracing circulation pipe 5 and the water collector 6 along the heat medium circulation pipe 2 in sequence to realize the tracing heat preservation of the water supply and drainage pipes; when the heat medium temperature measured by the first temperature measuring probe 7 is greater than or equal to 35°C, the first solenoid valve 3 is closed to stop the heat medium circulation; when the heat medium temperature measured by the first temperature measuring probe 7 is less than or equal to 15°C, the first solenoid valve 3 is opened again to continue the heat medium circulation.

[0064] It can be seen that at night and in rainy weather, this embodiment can also transfer the heat of the heat medium to the water supply and drainage pipes by means of the auxiliary heat tracing and heat preservation pipeline 14, the fourth solenoid valve 15, the second circulation pump 16 and the electric heating component 17, so as to avoid freezing and bursting.

[0065] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A solar-assisted heat tracing and heat preservation hot water control system, characterized in that It includes a solar collector (1), a tracing and heat preservation assembly, and a hot water control assembly; The tracing and heat preservation assembly includes a heat medium circulation pipe (2), a first solenoid valve (3), a water distributor (4), a tracing circulation pipe (5), a water collector (6), a first temperature measuring probe (7), a first circulation pump (8), and a second solenoid valve (9); one end of the heat medium circulation pipe (2) is a heat medium inlet end and is communicated with the outlet of the solar collector (1), and the other end is a heat medium outlet end and is communicated with the inlet of the solar collector (1); in the flowing direction of the heat medium, the first solenoid valve (3), the water distributor (4), the tracing circulation pipe (5), the water collector (6), the first temperature measuring probe (7), the first circulation pump (8), and the second solenoid valve (9) are sequentially arranged on the heat medium circulation pipe (2); The hot water control assembly includes a hot water storage tank (10), a second temperature measuring probe (11), a heat medium heat exchange pipeline (12), and a third solenoid valve (13); the hot water storage tank (10) is connected to a water using facility through a hot water supply pipe (20); the second temperature measuring probe (11) is connected to the hot water storage tank (10); the heat medium inlet end of the heat medium heat exchange pipeline (12) is communicated with the heat medium circulation pipe (2) between the outlet of the solar collector (1) and the first solenoid valve (3), and its heat medium outlet end is communicated with the heat medium circulation pipe (2) between the first temperature measuring probe (7) and the first circulation pump (8); the heat medium heat exchange pipeline (12) includes a main heat exchange pipeline arranged between its heat medium inlet end and heat medium outlet end, and the main heat exchange pipeline is arranged in the hot water storage tank (10); the third solenoid valve (13) is arranged on the heat medium heat exchange pipeline (12) and is located between its heat medium outlet end and its main heat exchange pipeline.

2. The solar energy assisted heat tracing and heat preservation hot water control system according to claim 1, wherein The tracing and heat preservation assembly further includes an auxiliary tracing and heat preservation pipeline (14), a fourth solenoid valve (15), and a second circulation pump (16); the heat medium inlet end of the auxiliary tracing and heat preservation pipeline (14) is communicated with the heat medium circulation pipe (2) and is located between the first temperature measuring probe (7) and the heat medium outlet end of the heat medium heat exchange pipeline (12), and the heat medium outlet end of the auxiliary tracing and heat preservation pipeline (14) is communicated with the heat medium heat exchange pipeline (12) and is located between the third solenoid valve (13) and the main heat exchange pipeline; the fourth solenoid valve (15) and the second circulation pump (16) are arranged on the auxiliary tracing and heat preservation pipeline (14).

3. The solar heat tracing and heat preservation hot water control system according to claim 2, wherein The hot water control assembly includes an electric heating component (17); the electric heating component (17) is arranged on the hot water storage tank (10) and is connected to a power supply.

4. The solar energy assisted heat tracing and heat preservation hot water control system according to claim 3, wherein, It further includes a third temperature measuring probe (18); the third temperature measuring probe (18) is arranged on the heat medium circulation pipe (2) and is located between the heat medium inlet end of the heat medium heat exchange pipeline (12) and the first solenoid valve (3).

5. The solar energy assisted heat tracing and heat preservation hot water control system according to claim 4, characterized in that The hot water storage tank (10) includes a water inlet, a water outlet and a water return port. The water inlet is connected to the cold water supply pipe (19), the water outlet is connected to the hot water supply pipe (20), and the water return port is connected to the hot water return pipe (21); a third circulation pump (28) is provided on the hot water supply pipe (20); the hot water return pipe (21) communicates with the hot water supply pipe (20); the cold water supply pipe (19) communicates with the water collector (6).

6. The solar energy assisted heat tracing and heat preservation hot water control system according to claim 5, wherein It further includes a fourth temperature measuring probe (22); the fourth temperature measuring probe (22) is provided on the hot water supply pipe (20).

7. The solar energy assisted heat tracing and heat preservation hot water control system according to claim 6, wherein It further includes a PLC controller; the PLC controller is connected to the first solenoid valve (3), the second solenoid valve (9), the third solenoid valve (13), the fourth solenoid valve (15), the first circulation pump (8), the second circulation pump (16), the third circulation pump (28), the first temperature measuring probe (7), the second temperature measuring probe (11), the third temperature measuring probe (18), the fourth temperature measuring probe (22) and the electric heating component (17).

8. The solar energy assisted heat tracing and heat preservation hot water control system according to claim 7, wherein, It further includes a plurality of automatic exhaust valves (23), a plurality of check valves (24), a plurality of heat medium expansion tanks (25), a plurality of drain valves (26) and a plurality of stop valves (27); The automatic exhaust valve (23) is provided on both the water distributor (4) and the water collector (6); The check valve (24) is provided on the heat medium heat exchange pipeline (12) and is located between the heat medium outlet end of the heat medium heat exchange pipeline (12) and the third solenoid valve (13); the check valve (24) is provided on the heat medium circulation pipe (2) and is respectively located between the heat medium inlet end of the auxiliary heat tracing and heat preservation pipeline (14) and the heat medium outlet end of the heat medium heat exchange pipeline (12), and between the third temperature measuring probe (18) and the heat medium inlet end of the heat medium heat exchange pipeline (12); the check valve (24) is provided on the auxiliary heat tracing and heat preservation pipeline (14); The heat medium expansion tank (25) is provided on both the heat medium heat exchange pipeline (12) and the heat medium circulation pipe (2); The drain valve (26) is provided on both the hot water return pipe (21) and the heat medium circulation pipe (2); The stop valve (27) is provided on the heat medium circulation pipe (2) and is located between the first solenoid valve (3) and the water distributor (4); the stop valve (27) is provided on the heat tracing circulation pipe (5).

9. An application method of a solar-assisted heat tracing and heat preservation hot water control system as described in any one of claims 1 to 8, characterized in that, The application method is an application method under the condition that the sunshine duration is greater than or equal to 4 hours, and it includes the following steps: Step A1, turn on the first solenoid valve (3), the second solenoid valve (9) and the first circulation pump (8), turn off the third solenoid valve (13), and the heat medium heated by the solar collector (1) passes through the water distributor (4), the heat tracing circulation pipe (5) and the water collector (6) in sequence along the heat medium circulation pipe (2) to realize heat tracing and heat preservation of the water supply and drainage pipes; Step A2: When the heat medium temperature measured by the first temperature measuring probe (7) is greater than or equal to 35°C, close the first solenoid valve (3), open the third solenoid valve (13), the second solenoid valve (9) and the first circulation pump (8). The heat medium heated by the solar collector (1) heats the cold water in the hot water storage tank (10) along the heat medium heat exchange pipeline (12) to form hot water, and then supplies it to users through the hot water supply pipe (20) and the water-using facilities; Step A3: When the hot water temperature measured by the second temperature measuring probe (11) is greater than or equal to 70°C, close the second solenoid valve (9) and the first circulation pump (8) to stop the heat medium circulation in the hot water storage tank (10). As the hot water in the hot water storage tank (10) is gradually used, at the same time, cold water is gradually injected into the hot water storage tank (10). When the hot water temperature measured by the second temperature measuring probe (11) is less than or equal to 55°C, reopen the second solenoid valve (9) and the first circulation pump (8), and the heat medium continues to heat the cold water in the hot water storage tank (10) along the heat medium heat exchange pipeline (12) to form hot water; Step A4: When the heat medium temperature measured by the first temperature measuring probe (7) is less than or equal to 15°C, operate according to Step A1; Step A5: Operate in a cycle in the order of Step A2, Step A3, Step A4, Step A1 to Step A2.

10. An application method of a solar energy assisted heat tracing and heat preservation hot water control system as described in any one of claims 3 to 8, characterized in that, The application method is the application method at night and on rainy and cloudy days, and it includes the following steps: When the difference between the temperature measured by the third temperature measuring probe (18) and the temperature measured by the second temperature measuring probe (11) is less than 5°C, close the second solenoid valve (9) and the first circulation pump (8) to stop the heat medium circulation in the hot water storage tank (10); When the temperature measured by the second temperature measuring probe (11) is greater than or equal to 17°C and the temperature measured by the first temperature measuring probe (7) is less than or equal to 15°C, open the first solenoid valve (3), the fourth solenoid valve (15) and the second circulation pump (16). At this time, the heat medium heated by the hot water storage tank (10) passes through the water distributor (4), the tracing circulation pipe (5) and the water collector (6) in sequence along the heat medium circulation pipe (2) to realize the tracing heat preservation of the water supply and drainage pipes. When the heat medium temperature measured by the first temperature measuring probe (7) is greater than or equal to 35°C, close the first solenoid valve (3) to stop the heat medium circulation; when the heat medium temperature measured by the first temperature measuring probe (7) is less than or equal to 15°C, reopen the first solenoid valve (3) to continue the heat medium circulation; When the temperature measured by the second temperature measuring probe (11) is less than or equal to 10 °C, the electric heating component (17) is turned on to heat the cold water in the hot water storage tank (10) to form hot water; when the hot water temperature measured by the second temperature measuring probe (11) is greater than or equal to 50 °C, the electric heating component (17) is turned off; the first solenoid valve (3), the fourth solenoid valve (15) and the second circulation pump (16) are turned on. At this time, the heat medium heated by the hot water storage tank (10) passes through the water distributor (4), the tracing circulation pipe (5) and the water collector (6) in sequence along the heat medium circulation pipe (2), so as to realize the tracing and heat preservation of the water supply and drainage pipes; when the heat medium temperature measured by the first temperature measuring probe (7) is greater than or equal to 35 °C, the first solenoid valve (3) is turned off to stop the heat medium circulation; when the heat medium temperature measured by the first temperature measuring probe (7) is less than or equal to 15 °C, the first solenoid valve (3) is turned on again to continue the heat medium circulation.

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