Multi-source radiation heating system

Abstract

The utility model provides a multi-source radiation heating system which comprises a solar heat collector, an air source heat pump, a gas-fired boiler, a radiation floor, a second circulating water pump, a first water mixing valve, a second water mixing valve, a third water mixing valve, a fourth water mixing valve, a first diverter valve, a second diverter valve, a third diverter valve, a fifth diverter valve and an eighth diverter valve. The solar heat collector, the air source heat pump and the gas-fired boiler are connected in parallel; and the first water mixing valve, the second water mixing valve and the third water mixing valve are respectively arranged at the junction of water outlet pipelines of the solar heat collector, the air source heat pump and the gas-fired boiler. By optimizing the structural design of the multi-source radiation heating system, various energy sources such as solar energy, an air source heat pump and natural gas are effectively utilized, the hot water storage tank and the solar heat collection system are combined on the premise of meeting the indoor thermal comfort requirement, solar radiation energy is more reasonably stored and utilized, the operation cost and carbon emission are reduced, and the energy-saving and environment-friendly effects are achieved. And sustainable heating is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to building heating ventilation air conditioning technical field especially, relate to a kind of multi-source radiant heating system. BACKGROUND

[0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art.

[0003] With the increasingly stringent building energy-saving standards and the improvement of user's thermal comfort requirements, the traditional single energy radiant heating system has limitations in reliability and economy, and has been difficult to meet the demand of environmental protection and high efficiency. Although gas boiler is relatively clean, it still depends on fossil energy. Radiant heating has the advantages of good comfort, low operating temperature and great energy-saving potential, and has become a research hotspot. Solar heating is greatly affected by weather, and the heating is unstable; the energy efficiency ratio of air source heat pump decreases in low temperature environment. Therefore, multi-energy complementary heating becomes a development trend, aiming to combine the advantages of different energies and improve the overall efficiency and reliability of the system. At present, although the research on multi-energy heating system has made certain progress, there are still some key problems to be solved, and the existing system is often a simple combination of different heat sources, lacking of deep integration and collaborative operation strategy among components, which limits the further improvement of energy utilization efficiency. In addition, the existing technology has simple structure of heat storage water tank, such as the water tank in the heating system provided by patent No. CN203657052U, which is difficult to realize the continuous, accurate and efficient use of auxiliary heat source of the system. SUMMARY

[0004] In order to solve the above problems, the utility model provides a kind of multi-source radiant heating system with high integration, good matching of heat source and end, and optimized energy storage link, by optimizing the structure design of multi-source radiant heating system, effectively utilizing solar energy, air source heat pump and natural gas and other multiple energies, under the premise of meeting the demand of indoor thermal comfort, combining hot water storage tank and solar energy collection system, more reasonably storing and utilizing solar radiation energy, reducing operating cost and carbon emission, realizing sustainable heating.

[0005] The present application provides a kind of multi-source radiant heating system, including: solar energy collector (1), air source heat pump (2), gas boiler (3), radiant floor (5), second circulating water pump (7), first mixed water valve (8), second mixed water valve (9), third mixed water valve (10), fourth mixed water valve (11), first shunt valve (13), second shunt valve (14), third shunt valve (15), fifth shunt valve (17), eighth shunt valve (20);

[0006] The solar collector (1), the air source heat pump (2) and the gas boiler (3) are connected in parallel; the first water mixing valve (8), the second water mixing valve (9) and the third water mixing valve (10) are respectively arranged at the water outlet pipe convergence of the solar collector (1), the air source heat pump (2) and the gas boiler (3).

[0007] Further, the hot water storage tank (4), the first circulating water pump (6), the fifth water mixing valve (12), the fourth shunt valve (16), the sixth shunt valve (18) and the seventh shunt valve (19) are further included.

[0008] The hot water storage tank (4) and the solar collector (1), the air source heat pump (2) and the gas boiler (3) are connected in parallel; the fourth water mixing valve (11) is arranged at the convergence of the water outlet pipe of the hot water storage tank (4) and the heat source mixed water flow; the fifth water mixing valve (12) is arranged at the convergence of the backwater pipe of the radiant floor (5) and the heat source backwater pipe.

[0009] Further, the hot water storage tank (4) is a pressure-bearing storage tank, and a layered heat storage structure is arranged therein, which is divided into an upper layer and a lower layer.

[0010] The hot water storage tank (4) comprises a hot water inlet (401), a hot water outlet (402), a backwater outlet (403), a backwater inlet (404), an upper inspection port (406), a side inspection port (407), a perforated plate (408), a heater (410), a metal shell (411) and a thermal insulation layer (412).

[0011] Further, the upper layer of the hot water storage tank supplies hot water for the system loop, and the upper layer of the hot water storage tank (4) comprises the hot water inlet (401) and the hot water outlet (402), the hot water inlet (401) is connected with the eighth shunt valve (20), and the hot water outlet (402) is connected with the fourth water mixing valve (11).

[0012] Further, the lower layer of the hot water storage tank recycles the high-temperature backwater of the radiant floor (5), and the lower layer of the hot water storage tank (4) comprises the backwater outlet (403) and the backwater inlet (404), the backwater outlet (403) is connected with the first circulating water pump (6), and the backwater inlet (404) is connected with the fourth shunt valve (16).

[0013] Further, the fifth shunt valve (17) is arranged on a bypass pipe, and the bypass pipe is used for connecting the backwater pipe of the radiant floor (5) and the first circulating water pump (6).

[0014] Further, the solar collector (1) is a flat plate type solar collector or a vacuum tube type solar collector.

[0015] Further, the air source heat pump (2) is an air-water heat pump.

[0016] Further, the gas boiler (3) is a natural gas boiler.

[0017] Further, the radiant floor (5) comprises hot water pipes embedded in the ground structure layer.

[0018] Compared with the prior art, the multi-source radiant heating system has the following beneficial effects:

[0019] (1) Realize the efficient collaborative operation of multiple heat sources. Through the parallel design of solar heat collector, air source heat pump and gas boiler, the system can dynamically adjust the operating power of each heat source according to different climate conditions and energy supply conditions, and ensure the stability and economy of heating. Especially when the solar energy is sufficient, the system can maximize the use of solar energy, reduce the operating cost, and meet the green and energy-saving environmental protection concept.

[0020] (2) The pressure-bearing storage tank and the layered heat storage structure are adopted, which significantly improves the energy utilization efficiency, effectively reduces the mixing of hot and cold water, and improves the heat exchange efficiency. The hot water storage tank can not only store excess heat, but also provide hot water as an auxiliary heat source for the system when the solar energy is insufficient or the air temperature is low.

[0021] (3) It has high intelligence and automation level. The operator can automatically adjust the start-stop and speed of each device, as well as the opening of each shunt valve and water mixing valve, according to the indoor thermal comfort demand, energy availability and operating cost through the intelligent control panel, to realize precise control of indoor temperature, and further improve the user's thermal comfort experience. At the same time, the system has high flexibility and scalability, and can adjust the type and quantity of heat sources according to actual needs, to adapt to the heating needs of different buildings and climate conditions. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings accompanying the specification of this disclosure serve to provide further understanding of the disclosure, and the illustrative embodiments of the disclosure and their descriptions are used to explain the disclosure, and do not constitute an improper limitation on the disclosure.

[0023] Figure 1 The system schematic diagram of the multi-source radiant heating system disclosed by the utility model is shown in the figure;

[0024] Figure 2 The structure schematic diagram of the hot water storage tank disclosed by the utility model is shown in the figure;

[0025] Wherein, 1, solar collector; 2, air source heat pump; 3, gas boiler; 4, hot water storage tank; 401, hot water inlet; 402, hot water outlet; 403, return water outlet; 404, return water inlet; 405, intelligent floating ball water level controller; 406, upper inspection port; 407, side inspection port; 408, orifice plate; 409, intelligent control panel; 410, heater; 411, metal shell; 412, insulation layer; 413, intelligent temperature control system; 5, radiant floor; 6, first circulating water pump; 7, second circulating water pump; 8, first mixing valve; 9, second mixing valve; 10, third mixing valve; 11, fourth mixing valve; 12, fifth mixing valve; 13, first shunt valve; 14, second shunt valve; 15, third shunt valve; 16, fourth shunt valve; 17, fifth shunt valve; 18, sixth shunt valve; 19, seventh shunt valve; 20, eighth shunt valve. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0027] Embodiment one

[0028] Please refer to Figure 1 The utility model provides a kind of multi-source radiation heating system, including solar collector (1), air source heat pump (2), gas boiler (3), radiant floor (5), second circulating water pump (7), first mixing valve (8), second mixing valve (9), third mixing valve (10), fourth mixing valve (11), first shunt valve (13), second shunt valve (14), third shunt valve (15), fifth shunt valve (17), eighth shunt valve (20);

[0029] Solar collector (1), air source heat pump (2) and gas boiler (3) are connected in parallel;First mixing valve (8), second mixing valve (9) and third mixing valve (10) are respectively arranged at the water outlet pipe convergence of solar collector (1), air source heat pump (2) and gas boiler (3).

[0030] In an embodiment, further comprising hot water storage tank (4), first circulating water pump (6), fifth mixing valve (12), fourth shunt valve (16), sixth shunt valve (18), seventh shunt valve (19);

[0031] Hot water storage tank (4) and solar collector (1), air source heat pump (2), gas boiler (3) are connected in parallel;Fourth mixing valve (11) is arranged at the convergence of hot water outlet pipe of hot water storage tank (4) and heat source mixed water flow;Fifth mixing valve (12) is arranged at the convergence of radiant floor (5) return water pipe and heat source return water pipe.

[0032] In one embodiment, the hot water storage tank (4) is a pressure tank with a built-in layered heat storage structure, which is divided into upper and lower layers.

[0033] The hot water storage tank (4) includes a hot water inlet (401), a hot water outlet (402), a return water outlet (403), a return water inlet (404), an upper inspection port (406), a side inspection port (407), a perforated plate (408), a heater (410), a metal shell (411), and a thermal insulation layer (412).

[0034] In one embodiment, the upper layer of the hot water storage tank supplies hot water for the system loop, and the upper layer of the hot water storage tank (4) includes the hot water inlet (401) and the hot water outlet (402). The hot water inlet (401) is connected to the eighth shunt valve (20), and the hot water outlet (402) is connected to the fourth mixed water valve (11).

[0035] In one embodiment, the lower layer of the hot water storage tank recycles the high-temperature return water of the radiant floor (5), and the lower layer of the hot water storage tank (4) includes the return water outlet (403) and the return water inlet (404). The return water outlet (403) is connected to the first circulating water pump (6), and the return water inlet (404) is connected to the fourth shunt valve (16).

[0036] In one embodiment, the fifth shunt valve (17) is arranged on the bypass pipeline, which is used to connect the radiant floor (5) return water pipeline and the first circulating water pump (6).

[0037] In one embodiment, the solar collector (1) is a flat plate solar collector or a vacuum tube solar collector.

[0038] In one embodiment, the air source heat pump (2) is an air-water heat pump, which absorbs low-grade heat energy from outdoor air and converts it into high-grade heat energy through the work of a compressor.

[0039] In one embodiment, the gas boiler (3) is a natural gas boiler.

[0040] In one embodiment, the radiant floor (5) includes a hot water pipeline buried in the ground structure layer, and the hot water pipeline is made of plastic pipe, and the ground structure layer is made of concrete.

[0041] The solar collector (1), the air source heat pump (2), and the gas boiler (3) constitute a multi-source combined system,

[0042] The solar collector (1) collects solar radiation and heats the circulating water, the air source heat pump (2) absorbs low-grade heat energy from outdoor air, and through the work of the compressor, it is converted into high-grade heat energy that can be used for heating, and the gas boiler (3) uses natural gas as the energy source and serves as the auxiliary heat source of the system.

[0043] As a further description of the above technical solution:

[0044] The first, second and third shunt valves (13, 14, 15) are respectively installed on the water outlet pipes of the solar collector (1), the air source heat pump (2) and the gas boiler (3) to control the heating capacity of each heat source. The first, second and third water mixing valves (8, 9, 10) are located downstream of the shunt valves and are used to mix hot water from different heat sources. The hot water storage tank (4) is connected downstream of the first, second and third water mixing valves (8, 9, 10) and is used to store the heat generated by the solar collector (1). The eighth shunt valve (20) is used to control the amount of hot water entering the hot water storage tank (4) and bypasses the hot water storage tank loop. The fourth water mixing valve (11) is located at the junction of the hot water storage tank outlet pipe and the eighth shunt valve (20) bypassing the mixed water flow of the first, second and third water mixing valves (8, 9, 10) to adjust the water supply temperature. The second circulating water pump (7) is used to drive the heating side water circuit to deliver the hot water output by the fourth water mixing valve (11) to the radiant floor. The radiant floor, as the terminal heat dissipation device, has a hot water pipe inside and supplies heat to the indoor through radiation. The fifth water mixing valve (12) is located at the junction of the radiant floor return water pipe and the heat source side return water pipe to adjust the return water temperature. The first circulating water pump (6) drives the heat source side water circuit to deliver the return water output by the fifth water mixing valve (12) to the solar collector (1), the air source heat pump (2) and the gas boiler (3) for heating. The fourth shunt valve (16) is located between the fifth water mixing valve (12) and the hot water storage tank (4) to control part of the return water entering the hot water storage tank (4). The fifth shunt valve (17) is used to directly circulate part of the return water of the radiant floor to the heat source inlet when the heating demand is low. The sixth shunt valve (18) is located downstream of the first circulating water pump (6) to control part of the return water entering the gas boiler (3). The seventh shunt valve (19) is located downstream of the sixth shunt valve (18) to control the remaining return water entering the solar collector (1) and the air source heat pump (2).

[0045] According to the indoor thermal comfort requirements, energy availability and operating costs, the start-stop and speed of the first circulating water pump (6) and the second circulating water pump (7) are dynamically adjusted, the opening degree of the first to fifth shunt valves and the eighth shunt valve (13-17, 20) is adjusted, the operating power of each heat source is controlled, and the mixing ratio of the first to fifth mixing valves (8-12) is adjusted. Preferably, solar energy is used, when solar energy is insufficient, an air source heat pump (2) is started, and when both the air source heat pump and the solar energy are insufficient, a gas boiler (3) is started.

[0046] The hot water storage tank (4) is a pressure-bearing storage tank, which is internally provided with a layered heat storage structure and is divided into two layers. The hot water inlet (401) is used for collecting solar radiation energy by the solar collector (1) and heating the circulating water. The hot water outlet (401) is used for extracting hot water from the water tank and conveying the hot water to the system loop. The backwater outlet (403) is used for sending the relatively cold water in the water tank to the heat source side for heating. The backwater inlet (404) is used for recovering the radiation floor backwater heat. The intelligent floating ball water level controller (405) is used for controlling the water quantity of the hot water storage tank and monitoring the hot water outlet water supply temperature. The upper inspection port (406) and the side inspection port (407) are used for observing the operation in the hot water storage tank (4). The orifice plate (408) realizes temperature layering and reduces the mixing efficiency of the relatively low-temperature backwater in the lower layer and the high-temperature hot water in the upper layer, so that the upper hot water outlet can provide a set temperature and the heat exchange efficiency is optimized. The intelligent control panel (413) is used for controlling the opening and closing of the hot water storage tank inlet and outlet and the start-stop of the heater. The metal shell (411) is made of stainless steel and has the pressure-bearing function. The insulation layer (412) is made of polyurethane foam material. The intelligent temperature control system (413) is used for monitoring the water temperature at the bottom of the hot water storage tank.

[0047] In one embodiment, the upper layer in the hot water storage tank preferentially supplies hot water to the system loop. The lower layer in the hot water storage tank recovers and utilizes part of the high-temperature backwater of the radiant floor and further heats the utilization. The heater is used to heat the relatively cold water in the lower layer, and the heated hot water utilizes natural convection to enter the upper layer of the hot water storage tank through the orifice plate.

[0048] The working principle of the utility model is:

[0049] In early winter, when the solar collector (1) can meet the radiant floor (5) water supply temperature, the solar collector (1) operates alone, and the residual heat of the circulating water circuit is stored in the hot water storage tank (4). When the air temperature gradually decreases, the solar collector (1) cannot meet the radiant floor (5) water supply temperature alone, and the air source heat pump (2) and the hot water storage tank (4) are started to operate cooperatively. In winter, the air source heat pump (2) has a significantly reduced energy efficiency ratio (COP) in a low-temperature environment, and the gas boiler (3) is further started to assist heating.

[0050] 1. Solar collector alone operation

[0051] Open the solar collector (1), radiant floor (5), the first circulating water pump (6), the second circulating water pump (7), the first and fourth to eighth shunt valves (13, 16-20) and the first to fifth mixing valves (8-12), close the air source heat pump (2), gas boiler (3), hot water storage tank (4), the second and third shunt valves (14, 15).

[0052] When the solar collector (1) collects solar radiation and heats the circulating water, through the first shunt valve (13), the first mixing valve (8), into the system loop, the heated circulating water through the second to fourth mixing valves (9-11), the second circulating water pump (7) and the fifth and eighth shunt valves (17, 20) into the radiant floor (5) and indoor heat exchange, the circulating back water after the fifth mixing valve (12) and the fourth, sixth and seventh shunt valves (16, 18, 19) back to the solar collector (1).

[0053] 2, solar collector, air source heat pump and hot water storage tank collaborative operation.

[0054] Open the solar collector (1), air source heat pump (2), hot water storage tank (4), radiant floor (5), water pump (6), water pump (7), first, second, fourth to eighth shunt valves (13, 14, 16-20) and first to fifth mixing valves (8-12), close the gas boiler (3) third shunt valve (15).

[0055] When the solar collector (1) collects solar radiation and heats the circulating water, through the first shunt valve (13), the first mixing valve (8) into the system loop, the air source heat pump (2) heating pipeline hot water through the second shunt valve (14), in the second mixing valve (9) and the solar radiation after the circulating water mixing, mixed after the heating circulating water through the third mixing valve (10) and the eighth shunt valve (20) after the fourth mixing valve (11) and hot water storage tank (4) provided in the hot water mixing, again after the second circulating water pump (7), fifth shunt valve (17) into the radiant floor (5). Circulating back water through the fifth mixing valve (12), the first circulating water pump (6), the fourth, seventh and sixth shunt valves (16, 19, 18) back to the hot water storage tank (4), air source heat pump (2) and solar collector (1) in turn.

[0056] 3, solar collector, air source heat pump, gas boiler, hot water storage tank collaborative operation

[0057] Open the solar collector (1), air source heat pump (2), gas boiler (3), hot water storage tank (4), radiant floor (5), first circulating water pump (6), second circulating water pump (7), first to eighth shunt valves (13-20) and first to fifth mixing valves (8-12).

[0058] The solar collector (1) heats the circulating water, which is mixed with the circulating water heated by the air source heat pump (2) after passing through the second shunt valve (14) through the first shunt valve (13) and the first water mixing valve (8). The mixed hot water is mixed with the hot water heated by the gas boiler (3) through the third water mixing valve (10), and the further mixed hot water is mixed with the hot water provided in the hot water storage tank (4) through the fourth water mixing valve (11). Finally, through the second circulating water pump (7) and the fifth shunt valve (17), it enters the radiant floor (5). The circulating backwater passes through the fifth water mixing valve (12), the first circulating water pump (6), the fourth, seventh and sixth shunt valves (16, 19, 18) in turn to return to the hot water storage tank (4), the gas boiler (3), the air source heat pump (2) and the solar collector (1).

[0059] 4. Hot water storage tank operation mode

[0060] The operation of the hot water storage tank (4) is divided into heat storage mode, heat release mode, heat preservation mode and electric auxiliary heat release mode.

[0061] In heat storage mode, the solar collector (1), the first circulating water pump (6), the first, sixth to eighth shunt valves (13, 18, 19, 20), the first to third water mixing valves (8, 9, 10), the hot water inlet (401) and the backwater outlet (403) are opened, and the air source heat pump (2), the gas boiler (3), the radiant floor (5), the second circulating water pump (7), the fourth and fifth water mixing valves (11, 12), the second to fifth shunt valves (14, 15, 16, 17), the hot water outlet (402), the backwater inlet (404) and the heater (410) are closed. When the solar collector (1) collects solar radiation and heats the circulating water, it passes through the first shunt valve (13), the first water mixing valve (8), and the external water supplement passes through the first water mixing valve (8) into the system loop. The heated circulating water enters the hot water storage tank (4) for heat storage through the first and second water mixing valves (9, 10) and the eighth shunt valve (20). The backwater in the hot water storage tank (4) returns to the solar collector (1) through the first circulating water pump (6) and the sixth and seventh shunt valves (18, 19).

[0062] In heat release mode, the hot water outlet (402) is opened, and the hot water inlet (401), the backwater outlet (403), the backwater inlet (404) and the heater (410) are closed. The water tank amount is controlled by the intelligent floating ball water level controller (405). When the intelligent floating ball water level controller (405) is lower than the minimum water amount set value of the water tank, the hot water outlet (402) is closed.

[0063] In the heat preservation mode, the hot water inlet (401), the hot water outlet (402), the return water outlet (403) and the return water inlet (404) are closed, the heater (410) is opened, the water tank heat preservation temperature is set according to the intelligent control panel (409), the intelligent floating ball water level controller (405) monitors the water temperature, and the start and stop of the heater (410) is controlled.

[0064] In the electric auxiliary heat release mode, the hot water inlet (401), the hot water outlet (402), the return water outlet (403), the return water inlet (404) and the heater (410) are opened, the hot water tank (4) sets the hot water outlet (402) outlet temperature and the return water inlet (404) return water temperature according to the intelligent control panel (409), and the outlet temperature is monitored through the intelligent floating ball water level controller (405). When the hot water outlet temperature is lower than the set requirement, the hot water outlet (402) is closed, and the heater (410) is started. When the intelligent temperature control system (413) monitors that the radiant floor (5) return water temperature is higher than the set value, the return water inlet (404) is opened, otherwise it is closed.

[0065] In the description of the present application, the terms "connection", "installation", "fixation", "setting" and the like are understood in a broad sense, for example, "connection" can be fixed connection or indirect through intermediate components without affecting the relationship between components and technical effects, or it can be integrated connection or partial connection, as the case may be for a person skilled in the art, the specific meaning of the above terms in the present application or utility model can be understood according to the specific circumstances.

[0066] The above is only the preferred specific implementation mode of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A multi-source radiation heating system, characterized in that, Comprise: Solar collector (1), air source heat pump (2), gas boiler (3), radiant floor (5), second circulating water pump (7), first mixed water valve (8), second mixed water valve (9), third mixed water valve (10), fourth mixed water valve (11), first shunt valve (13), second shunt valve (14), third shunt valve (15), fifth shunt valve (17), eighth shunt valve (20); The solar collector (1), air source heat pump (2) and gas boiler (3) are connected in parallel; the first mixed water valve (8), second mixed water valve (9) and third mixed water valve (10) are respectively arranged at the water outlet pipe convergence of the solar collector (1), air source heat pump (2) and gas boiler (3).

2. The multi-source radiation heating system of claim 1, wherein, Also including hot water storage tank (4), first circulating water pump (6), fifth mixed water valve (12), fourth shunt valve (16), sixth shunt valve (18), seventh shunt valve (19); The hot water storage tank (4) and solar collector (1), air source heat pump (2), gas boiler (3) are connected in parallel; the fourth mixed water valve (11) is arranged at the convergence of the hot water outlet pipe of the hot water storage tank (4) and the heat source mixed water flow; the fifth mixed water valve (12) is arranged at the convergence of the radiant floor (5) backwater pipe and the heat source backwater pipe.

3. The multi-source radiant heating system of claim 2, wherein, The hot water storage tank (4) is a pressure type storage tank, which is internally provided with a layered heat storage structure and is divided into upper and lower layers. The hot water storage tank (4) comprises a hot water inlet (401), a hot water outlet (402), a backwater outlet (403), a backwater inlet (404), an upper inspection port (406), a side inspection port (407), a perforated plate (408), a heater (410), a metal shell (411) and a thermal insulation layer (412).

4. The multi-source radiation heating system of claim 3, wherein, The upper layer of the hot water storage tank is used for hot water supply of the system loop, and the upper layer of the hot water storage tank (4) comprises the hot water inlet (401) and the hot water outlet (402), the hot water inlet (401) is connected with the eighth shunt valve (20), and the hot water outlet (402) is connected with the fourth mixed water valve (11).

5. The multi-source radiant heating system of claim 3, wherein, The lower layer of the hot water storage tank recycles the high-temperature backwater of the radiant floor (5), and the lower layer of the hot water storage tank (4) comprises the backwater outlet (403) and the backwater inlet (404), the backwater outlet (403) is connected with the first circulating water pump (6), and the backwater inlet (404) is connected with the fourth shunt valve (16).

6. The multi-source radiant heating system of claim 1, wherein, The fifth shunt valve (17) is arranged on a bypass pipe, and the bypass pipe is used for connecting the radiant floor (5) backwater pipe and the first circulating water pump (6).

7. The multi-source radiant heating system of claim 1, wherein, The solar collector (1) is a flat plate type solar collector or a vacuum tube type solar collector.

8. The multi-source radiant heating system of claim 1, wherein, The air source heat pump (2) is an air-water heat pump.

9. The multi-source radiant heating system of claim 1, wherein, The gas boiler (3) is a natural gas boiler.

10. The multi-source radiant heating system of claim 1, wherein, The radiant floor (5) comprises a hot water pipe buried in a ground structure layer.

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