Solar closed constant-temperature circulating hot water system

Abstract

The utility model belongs to the field of solar water heating systems, and discloses a solar closed constant-temperature circulating water heating system. Comprising a solar heat collector and a displacement heat exchanger. An outlet of the solar heat collector is sequentially connected with a heat collector water outlet pipeline A, a three-way valve A, a heat collector water outlet pipeline B, a displacement heat exchanger, a heat collector water return pipeline A, a solar heat collection pump and an inlet of the solar heat collector. One outlet of the three-way valve A is sequentially connected with an air cooling radiator, an air cooling radiator water outlet pipeline and a heat collector water return pipeline A; the top of the displacement heat exchanger is sequentially connected with a hot water supply pipeline, a three-way valve B and a tail end water supply pipeline; one outlet of the three-way valve B is sequentially connected with an auxiliary heat source water inlet pipeline, an auxiliary heat source and a tail end water supply pipeline; the bottom of the displacement heat exchanger is connected with a heat exchanger water return pipeline. Temperature and quality of hot water are guaranteed, and investment and operation cost are saved.

Description

Technical Field

[0001] The utility model belongs to the field of solar water heating systems and relates to a solar closed constant temperature circulation water heating system. Background Art

[0002] The existing solar energy systems are all open water tanks, and there are two water tanks, one is a heat collecting tank and the other is a constant temperature water tank. The heat collecting tank exchanges heat with the solar energy through a plate heat exchanger and then stores the heat in the heat storage tank. To ensure the constant temperature of the constant temperature water tank, water needs to be conducted between the two water tanks. The water tanks in this system are open, and there will be steam leakage and hot air escaping, which wastes some heat. In addition, the open system is prone to breeding bacteria and the water quality cannot be guaranteed. To ensure the temperature of the water tank, water needs to be conducted through a water pump, which not only increases equipment investment, but also consumes electricity when the water pump is running. In view of the above problems, the utility model provides a solar closed constant temperature circulation hot water system. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the above-mentioned background technology, to ensure the heat and temperature of hot water, maintain good water quality, eliminate oxygen corrosion and acid corrosion, save investment and operating costs, and provide a solar closed constant temperature circulation hot water system to ensure the temperature and water quality of hot water and save investment and operating costs.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a solar closed constant temperature circulation hot water system, comprising a solar collector and a volumetric heat exchanger; the outlet of the solar collector is connected to a collector outlet pipe A, a three-way valve A, a collector outlet pipe B, a volumetric heat exchanger, a collector return pipe A, a solar heat collector pump, and an inlet of the solar collector in sequence; one of the outlets of the three-way valve A is connected to an air-cooled radiator, an air-cooled radiator outlet pipe, and a collector return pipe A in sequence; the top of the volumetric heat exchanger is connected to a hot water supply pipe, a three-way valve B, and a terminal water supply pipe in sequence; one of the outlets of the three-way valve B is connected to an auxiliary heat source inlet pipe, an auxiliary heat source, and a terminal water supply pipe in sequence; the bottom of the volumetric heat exchanger is connected to a heat exchanger return pipe, and the heat exchanger return pipe is connected to a cold water replenishment pipe and a terminal return pipe; the cold water replenishment pipe and the terminal return pipe are arranged in parallel.

[0005] The outlet of the solar collector is connected to the inlet of the three-way valve A through the collector outlet pipe A.

[0006] One outlet of the three-way valve A is connected to the inlet of the air-cooled radiator, the outlet of the air-cooled radiator is connected to the inlet of the solar heat pump through the air-cooled radiator outlet pipe, and the other outlet of the three-way valve A is connected to the heat source inlet of the volumetric heat exchanger through the collector outlet pipe B.

[0007] The heat source outlet of the volumetric heat exchanger is connected to the inlet of the solar heat pump through the collector return pipe A, and the outlet of the solar heat pump is connected to the inlet of the solar collector through the collector return pipe B.

[0008] The hot water outlet of the volumetric heat exchanger is connected to the inlet of the three-way valve B through a hot water supply pipe, one outlet of the three-way valve B is connected to the inlet of the auxiliary heat source through an auxiliary heat source inlet pipe, and the outlet of the auxiliary heat source is connected to the other outlet of the three-way valve B through a terminal water supply pipe.

[0009] A safety valve is arranged on the top outer wall of the volumetric heat exchanger.

[0010] A temperature sensor B is arranged on the upper part of the volumetric heat exchanger.

[0011] A temperature sensor A is provided on the water outlet pipe A of the collector.

[0012] A temperature sensor C is provided on the hot water supply pipeline.

[0013] A backflow preventer is arranged on the cold water replenishment pipeline.

[0014] A hot water return pump and a temperature sensor D are provided on the terminal return water pipe.

[0015] The end of the terminal water return pipe is connected to the terminal water return main pipe.

[0016] The end of the terminal water supply pipeline is connected to the terminal water supply main pipeline.

[0017] The inlet of the hot water return pump is connected to the terminal return main pipeline, and the outlet of the hot water return pump is connected to the return port of the volumetric heat exchanger through the terminal return pipeline and the heat exchanger return pipeline.

[0018] A check valve is arranged between the water outlet pipe of the air-cooled radiator and the outlet of the volumetric heat exchanger.

[0019] The system is also equipped with a PLC control system. The solar collector, volumetric heat exchanger, air-cooled radiator, solar heat pump, hot water return pump, three-way valve A, three-way valve B, check valve, backflow preventer, auxiliary heat source, safety valve, temperature sensor A, temperature sensor B, temperature sensor C, and temperature sensor D are connected to the PLC control system respectively, and are not limited to a specific model, as long as their working functions are realized. The temperature sensor A, temperature sensor B, and temperature sensor C are respectively linked with the three-way valve A, three-way valve B, solar collector, solar heat pump, and hot water return pump.

[0020] The auxiliary heat source is an air source heat pump, an electric boiler, a gas boiler, etc., and an air source heat pump is preferably used.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] 1. The utility model provides a closed-loop solar water heating system, in which the hot water is heated instantly, thus reducing the energy waste caused by repeated heating;

[0023] 2. The utility model replaces the volumetric heat exchanger, making the system a closed system, thus avoiding the phenomenon of hot water vapor bubbling out;

[0024] 3. The utility model provides a closed-loop solar water heating system, which reduces the investment and operating expenses of water tanks and water guide pumps, and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0026] Figure 1 The utility model is a schematic diagram of a solar closed constant temperature circulating hot water system.

[0027] In the figure, 1. solar collector, 2. volumetric heat exchanger, 3. air-cooled radiator, 4. solar heat pump, 5. hot water return pump, 6. auxiliary heat source, 7. three-way valve A, 8. three-way valve B, 9. check valve, 10. backflow preventer, 11. safety valve, 12. temperature sensor A, 13. temperature sensor B, 14. temperature sensor C, 15. collector outlet pipe A, 16. collector outlet pipe B, 17. air-cooled radiator outlet pipe, 18. collector return pipe A, 19. heat exchanger return pipe, 20. cold water replenishment pipe, 21. terminal return pipe, 22. terminal water supply pipe, 23. collector return pipe B, 24. hot water supply pipe, 25. auxiliary heat source inlet pipe, 26. temperature sensor D. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

[0029] Example 1

[0030] A solar closed constant temperature circulation hot water system, such as Figure 1As shown, it includes a solar collector 1 and a volumetric heat exchanger 2; the outlet of the solar collector 1 is sequentially connected to the collector outlet pipe A15, the three-way valve A7, the collector outlet pipe B16, the volumetric heat exchanger 2, the collector return pipe A18, the solar heat pump 4, and the inlet of the solar collector 1; one of the outlets of the three-way valve A7 is sequentially connected to the air-cooled radiator 3, the air-cooled radiator outlet pipe 17, and the collector return pipe A18; the top of the volumetric heat exchanger 2 is sequentially connected to the hot water supply pipe 24, the three-way valve B8, and the terminal water supply pipe 22; the three-way valve B One of the outlets is connected to the auxiliary heat source water inlet pipe 25, the auxiliary heat source 6, and the terminal water supply pipe 22 in sequence; the bottom of the volumetric heat exchanger 2 is connected to the heat exchanger return pipe 19, and the heat exchanger return pipe 19 is connected to the cold water feed pipe 20 and the terminal return pipe 21; the cold water feed pipe 20 and the terminal return pipe 21 are arranged in parallel.

[0031] The outlet of the solar collector 1 is connected to the inlet of the three-way valve A7 through the collector outlet pipe A15.

[0032] One outlet of the three-way valve A7 is connected to the inlet of the air-cooled radiator 3, and the outlet of the air-cooled radiator 3 is connected to the inlet of the solar heat pump 4 through the air-cooled radiator water outlet pipe 17, and the other outlet of the three-way valve A7 is connected to the heat source inlet of the volumetric heat exchanger 2 through the collector water outlet pipe B16.

[0033] The heat source outlet of the volumetric heat exchanger 2 is connected to the inlet of the solar heat pump 4 through the collector return pipe A18, and the outlet of the solar heat pump 4 is connected to the inlet of the solar collector 1 through the collector return pipe B23.

[0034] The hot water outlet of the volumetric heat exchanger 2 is connected to the inlet of the three-way valve B8 through a hot water supply pipe 24, one outlet of the three-way valve B8 is connected to the inlet of the auxiliary heat source 6 through an auxiliary heat source water inlet pipe 25, and the outlet of the auxiliary heat source 6 is connected to the other outlet of the three-way valve B8 through a terminal water supply pipe 22.

[0035] A safety valve 11 is disposed on the top outer wall of the volumetric heat exchanger 2 .

[0036] A temperature sensor B13 is provided on the upper portion of the volumetric heat exchanger 2 .

[0037] A temperature sensor A12 is provided on the collector water outlet pipe A15.

[0038] The hot water supply pipe 24 is provided with a temperature sensor C14.

[0039] The cold water replenishment pipe 20 is provided with a backflow preventer 10 .

[0040] The terminal return water pipe 21 is provided with a hot water return water pump 5 and a temperature sensor D 26 .

[0041] The end of the terminal water return pipe 21 is connected to the terminal water return main pipe.

[0042] The end of the terminal water supply pipeline 22 is connected to the terminal water supply main pipeline.

[0043] The inlet of the hot water return pump 5 is connected to the terminal return main pipeline, and the outlet of the hot water return pump 5 is connected to the return port of the volumetric heat exchanger 2 through the terminal return pipeline 21 and the heat exchanger return pipeline 19.

[0044] A check valve 9 is provided between the water outlet pipe 17 of the air-cooled radiator and the outlet of the volumetric heat exchanger 2 .

[0045] The system is also equipped with a PLC control system. The solar collector 1, the volumetric heat exchanger 2, the air-cooled radiator 3, the solar heat pump 4, the hot water return pump 5, the three-way valve A 7, the three-way valve B 8, the check valve 9, the backflow preventer 10, the safety valve 11, the temperature sensor A 12, the temperature sensor B 13, the temperature sensor C 14, the temperature sensor D 26, and the auxiliary heat source 6 are respectively connected to the PLC control system, and are not limited to a specific model, as long as their working functions are realized.

[0046] After the cold water supply pipe 20 enters the volumetric heat exchanger 2 for heating, the temperature sensor C14 detects the temperature of the hot water supply pipe 24 and works in conjunction with the three-way valve B8. When the temperature is lower than the set value, the three-way valve B8 opens and starts the auxiliary heat source heating to achieve the purpose of constant temperature.

[0047] After the collector cold water is heated up by the solar collector 1, the temperature sensor A12 detects the temperature of the collector outlet pipe A15, which is linked with the three-way valve A7. When it is higher than the set temperature and the set time, the three-way valve A7 opens and starts the air cooling mode to avoid overheating and ensure system safety.

[0048] After the cold water replenishment pipe 20 enters the volumetric heat exchanger 2 for heating, the temperature sensor B13 detects the hot water temperature in the tank of the volumetric heat exchanger 2 and works in conjunction with the solar heat pump 4. When the temperature is lower than the set value, the solar heat pump 4 starts to ensure that the water temperature in the tank of the volumetric heat exchanger 2 is constant.

[0049] The temperature sensor D 26 detects the temperature of the terminal return water pipe 21 and is linked with the hot water return water pump 5. When the temperature is lower than the set temperature, the hot water return water pump 5 starts to ensure that the terminal water temperature is constant.

[0050] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A solar closed constant temperature circulating hot water system, characterized in that: The invention comprises a solar collector (1) and a volumetric heat exchanger (2); the outlet of the solar collector (1) is connected in sequence to a collector outlet pipe A (15), a three-way valve A (7), a collector outlet pipe B (16), a volumetric heat exchanger (2), a collector return pipe A (18), a solar heat pump (4), and an inlet of the solar collector (1); one of the outlets of the three-way valve A (7) is connected in sequence to an air-cooled radiator (3), an air-cooled radiator outlet pipe (17), and a collector return pipe A (18); the volumetric heat exchanger The top of the volumetric heat exchanger (2) is connected in sequence to a hot water supply pipeline (24), a three-way valve B (8), and a terminal water supply pipeline (22); one of the outlets of the three-way valve B (8) is connected in sequence to an auxiliary heat source water inlet pipeline (25), an auxiliary heat source (6), and a terminal water supply pipeline (22); the bottom of the volumetric heat exchanger (2) is connected to a heat exchanger return pipeline (19), and the heat exchanger return pipeline (19) is connected to a cold water replenishment pipeline (20) and a terminal return pipeline (21); the cold water replenishment pipeline (20) and the terminal return pipeline (21) are arranged in parallel.

2. A solar closed constant temperature circulating hot water system as claimed in claim 1, characterized in that: The outlet of the solar collector (1) is connected to the inlet of the three-way valve A (7) through a collector outlet pipe A (15).

3. A solar closed constant temperature circulating hot water system as claimed in claim 1, characterized in that: One outlet of the three-way valve A (7) is connected to the inlet of the air-cooled radiator (3), the outlet of the air-cooled radiator (3) is connected to the inlet of the solar heat pump (4) through the air-cooled radiator water outlet pipe (17), and the other outlet of the three-way valve A (7) is connected to the heat source inlet of the volumetric heat exchanger (2) through the collector water outlet pipe B (16).

4. A solar closed constant temperature circulating hot water system as claimed in claim 1, characterized in that: The heat source outlet of the volumetric heat exchanger (2) is connected to the inlet of the solar heat pump (4) via the collector return pipe A (18), and the outlet of the solar heat pump (4) is connected to the inlet of the solar heat collector (1) via the collector return pipe B (23).

5. A solar closed constant temperature circulating hot water system as claimed in claim 1, characterized in that: The hot water outlet of the volumetric heat exchanger (2) is connected to the inlet of the three-way valve B (8) via a hot water supply pipe (24); one outlet of the three-way valve B (8) is connected to the inlet of the auxiliary heat source (6) via an auxiliary heat source water inlet pipe (25); and the outlet of the auxiliary heat source (6) is connected to the other outlet of the three-way valve B (8) via a terminal water supply pipe (22).

6. A solar closed constant temperature circulating hot water system as claimed in claim 1, characterized in that: A safety valve (11) is provided on the top outer wall of the volumetric heat exchanger (2).

7. A solar closed constant temperature circulating hot water system as claimed in claim 1, characterized in that: A temperature sensor B (13) is arranged on the upper part of the volumetric heat exchanger (2); a temperature sensor A (12) is arranged on the collector water outlet pipe A (15); and a temperature sensor C (14) is arranged on the hot water supply pipe (24).

8. A solar closed constant temperature circulating hot water system as claimed in claim 1, characterized in that: A backflow preventer (10) is provided on the cold water replenishment pipeline (20).

9. A solar closed constant temperature circulating hot water system as claimed in claim 1, characterized in that: The terminal water return pipe (21) is provided with a hot water return pump (5) and a temperature sensor D (26).

10. A solar closed constant temperature circulating hot water system as claimed in claim 1, characterized in that: A check valve (9) is provided between the water outlet pipe (17) of the air-cooled radiator and the outlet of the volumetric heat exchanger (2).

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