CN108644866B - A solar energy coupling water source heat pump heating system and using method - Google Patents

Abstract

The present invention discloses a kind of solar energy Coupling Water-source Heat Pump heat supply heating system and application method, it is related to heating plant technical field, primary structure includes solar thermal collector, domestic hot-water's hot water storage tank, heating hot water storage tank, heat pump, First Heat Exchanger, the second heat exchanger, Low Temperature Thermal land source side water pump, heat-collecting pump, middle water pump, low-temperature heat source and controller；Pass through the opening and closing of each valve and pump in controller control system, domestic hot-water's hot water storage tank and heating hot water storage tank pass through series operation or heating hot water storage tank isolated operation, it is capable of forming different heating modes, to make full use of solar energy while provide domestic hot-water and heating for user.

Description

A solar energy coupling water source heat pump heating system and using method

technical field

The invention relates to the technical field of heating devices, in particular to a solar energy coupling water source heat pump heating system and a use method.

Background technique

With the increase of building energy consumption year by year, building energy conservation and the utilization technology of renewable energy have become the focus of many scholars. Water source heat pump is an application technology of renewable energy, and its reasonable application can achieve good energy saving and environmental protection effects. This technology uses the heat in surface water, groundwater, or domestic sewage such as rivers, lakes, and seas. Generally, 2 to 4 times the heat can be obtained by inputting a small amount of electric energy during heating; at the same time, solar energy, an easily available renewable energy, is used to assist water sources The heat pump system provides heating for buildings, which is of great practical significance to alleviate environmental problems such as the depletion of fossil energy and the increasingly serious smog in our country.

The feasibility of solar coupled water source heat pump technology has become the consensus of many researchers. Studies have shown that this dual heat source heating technology can solve the problem of too large collector area when solar energy alone is used for heating, and on the other hand, it can improve the low temperature water source of heat pump units. side water temperature, thereby improving the operating energy efficiency of the unit and reducing the operating energy consumption of the system. The single water source heat pump technology is relatively mature, and the solar heating system is also guided by technical specifications, but the research on the combined solar-water source heat pump system in building heating, especially the research on short-term heat storage solar coupled water source heat pump heating is still insufficient. For short-term thermal storage of solar energy, since solar energy has the characteristics of diurnal intermittent and daytime sunshine time and intensity irregularity, the operation mode of the combined system becomes the key to improve the energy efficiency and reliability of the combined system. The general operation mode of the current solar-coupled water-source heat pump is: while the solar heat is stored, different operation modes are selected in real time according to the outlet water temperature of the water storage tank, so as to make full use of the hot water in the water tank for heating. This operation mode effectively increases the water temperature on the low-temperature water source side of the heat pump, and the energy efficiency of the heat pump unit increases accordingly, thereby saving the energy consumption of the system. However, the hot water in the water tank is used in real time so that the average temperature of the hot water in the hot water storage tank cannot be sufficiently increased during the heating process of the system, resulting in a shorter time for the hot water in the water tank to be directly used for heating, or The direct supply temperature cannot be reached at all, so the heat pump unit needs to be turned on and heated for a long time. This mode of operation seems to be able to utilize solar energy in a timely manner, but it has been found through research that the energy efficiency of the system cannot be maximized due to the inability to fully utilize the advantages of direct solar heating.

Contents of the invention

In order to solve the above technical problems, the present invention provides a solar energy coupling water source heat pump heating system and method, which can provide domestic hot water and heating for users at the same time.

To achieve the above object, the present invention provides the following scheme:

The invention provides a solar energy coupled water source heat pump heating system, comprising a solar collector, a domestic hot water storage tank, a heating storage tank, a heat pump, a first heat exchanger, a second heat exchanger, and a low-temperature heat source Side water pump, heat collector pump, middle water pump, low temperature heat source and controller;

The main circulating water outlet of the solar heat collector communicates with the first water inlet of the domestic hot water storage tank through a first pipeline, and the first water outlet of the domestic hot water storage tank communicates with the first water outlet of the domestic hot water storage tank. The second water inlet of the heating water storage tank is connected through a second pipeline, and the second water outlet of the heating water storage tank is connected with the main circulating water inlet of the solar collector through a third pipeline ;

The main circulating water outlet and the main circulating water inlet are connected inside the solar collector; the first water inlet and the first water outlet are inside the domestic hot water storage tank connected; the second water inlet and the second water outlet are connected inside the heating storage tank;

The third water inlet of the heat pump communicates with the fourth water outlet of the first heat exchanger through a fifth pipeline, and the fourth water inlet of the first heat exchanger communicates with the fourth water outlet of the second heat exchanger. The fifth water outlet is connected through the sixth pipeline, and the fifth water inlet of the second heat exchanger is connected with the third water outlet of the heat pump through the seventh pipeline;

The third water inlet communicates with the third water outlet inside the heat pump; the fourth water outlet communicates with the fourth water inlet inside the first heat exchanger; the The fifth water outlet communicates with the fifth water inlet inside the second heat exchanger;

The sixth water outlet of the heat pump communicates with the heating user through the eighth pipeline; the sixth water inlet of the heat pump communicates with the heating user through the ninth pipeline;

The sixth water outlet and the sixth water inlet are connected inside the heat pump;

Both the seventh water inlet and the seventh water outlet of the second heat exchanger are connected to the low-temperature heat source; the seventh water inlet and the seventh water outlet are connected inside the second heat exchanger The low-temperature heat source side water pump is arranged between the seventh water inlet and the low-temperature heat source;

The eighth water outlet of the first heat exchanger communicates with the ninth water inlet of the heating storage tank through the tenth pipeline, and the eighth water inlet of the first heat exchanger communicates with the heating storage tank. The ninth water outlet of the hot water tank is connected through the eleventh pipeline; the intermediate water pump is arranged on the eleventh pipeline; the ninth water outlet and the eighth pipeline are connected through the twelfth pipeline Connected;

The eighth water outlet is connected to the eighth water inlet inside the first heat exchanger; the ninth water outlet is connected to the ninth water inlet inside the heating water storage tank Pass;

The eighth water outlet communicates with the seventh pipeline through the thirteenth pipeline; the seventh pipeline communicates with the ninth pipeline through the fourteenth pipeline;

A fifteenth pipeline is further arranged between the fifth pipeline and the eleventh pipeline, and a thirteenth valve is arranged on the fifteenth pipeline;

A fourth pipeline is also provided between the main circulating water outlet of the solar heat collector and the second water inlet of the heating water storage tank; a first valve is provided on the fourth pipeline;

The first pipeline is provided with a second valve, the third pipeline is provided with a third valve, the tenth pipeline is provided with a fourth valve, and the sixth pipeline is provided with a fifth valve. The thirteenth pipeline is provided with a sixth valve, the seventh pipeline is provided with a seventh valve, the fourteenth pipeline is provided with an eighth valve, and the twelfth pipeline is provided with a ninth valve, so The eleventh pipeline is provided with a tenth valve, the fifteenth pipeline is provided with an eleventh valve, the eighth pipeline is provided with a twelfth valve, and the ninth pipeline is provided with a thirteenth valve. valve;

The controller is used to control the first valve, the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the Opening and closing of the eighth valve, the ninth valve, the tenth valve, the eleventh valve, the twelfth valve, and the thirteenth valve;

The controller is electrically connected to the heat pump, the low-temperature heat source side water pump, the heat collection pump and the intermediate water pump.

Optionally, the eighth pipeline is provided with a terminal circulating water pump, and the terminal circulating water pump is electrically connected to the controller.

Optionally, the domestic hot water storage tank is also provided with a replenishment pipe and a user hot water pipe.

Optionally, an auxiliary electric heater is also provided on the domestic hot water storage tank, and the auxiliary electric heater is electrically connected to the controller.

Optionally, a secondary circulation pump is provided on the sixth pipeline, and the secondary circulation pump is electrically connected to the controller.

Optionally, both the first water outlet and the second water outlet are provided with temperature sensors, and the temperature sensors are electrically connected to the controller.

The present invention also provides a method for using the above-mentioned solar energy coupled water source heat pump heating system, including the following five operating modes:

The first type, solar energy direct heating domestic hot water mode: when the water outlet temperature of the first outlet of the domestic hot water storage tank is lower than the set outlet water temperature of the domestic hot water storage tank, the first valve is closed and the second valve is opened. The second valve and the third valve turn on the heat collector pump, and the system directly uses the solar collector to heat the water in the domestic hot water storage tank to provide domestic hot water for hot water users;

The second type, solar direct heating mode: when the water temperature T of the second water outlet of the heating storage tank is higher than the set direct supply starting temperature Td, the system directly uses solar hot water for heating. At this time, the first valve, The third valve, the fourth valve, the sixth valve, the eighth valve and the ninth valve are all open, the second valve, the fifth valve, the seventh valve, the tenth valve, the eleventh valve, the twelfth valve and the tenth valve All three valves are closed, and the end circulation pump is turned on, and the secondary circulation pump, heat pump, low-temperature heat source side water pump and middle water pump are turned off;

The third type, solar indirect heating heat pump heating mode: when the outlet temperature T of the heating water storage tank is lower than the set direct supply starting temperature Td, and higher than the maximum working temperature Th of the heat pump, at this time, the first valve, the second The third valve, the fourth valve, the fifth valve, the seventh valve, the tenth valve, the twelfth valve and the thirteenth valve are all open, the second valve, the sixth valve, the eighth valve, the ninth valve and the eleventh valve are all open. The valves are all closed, and the low-temperature heat source side water pump, end circulation water pump, middle water pump, secondary circulation pump and heat pump are turned on. The hot water in the heating water storage tank transfers heat to the low-temperature heat source through the first heat exchanger, and the low-temperature heat source water is raised. The temperature of the water entering the heat pump, through which the user is heated;

Fourth, solar energy series heat pump heating mode: when the outlet temperature T of the heating water storage tank is higher than the temperature of the low-temperature heat source Tw and lower than the maximum working temperature Th of the heat pump, at this time, the first valve, the third valve, and the fourth valve , the sixth valve, the eleventh valve, the twelfth valve and the thirteenth valve are all open, the second valve, the fifth valve, the seventh valve, the eighth valve, the ninth valve and the tenth valve are all closed. Circulating water pump, heat pump and intermediate water pump, turn off the low-temperature heat source side water pump and the secondary circulation pump, the hot water in the heating storage tank directly enters the heat pump for heat exchange, increases the temperature of the water entering the heat pump, and heats the user through the heat pump;

Fifth, heat pump independent heating mode: when the outlet temperature T of the heating storage tank is lower than the temperature Tw of the low-temperature heat source, at this time, the first valve, the third valve, the fifth valve, the seventh valve, and the twelfth valve and the thirteenth valve are all open, the second valve, the fourth valve, the sixth valve, the eighth valve, the ninth valve, the tenth valve and the eleventh valve are all closed, and the low-temperature heat source side water pump, the terminal circulating water pump, and the second valve are turned on. For the secondary circulation pump and heat pump, turn off the intermediate water pump, and the system stops taking heat from the heating water storage tank. At this time, the heat pump operates independently, and the heat extracted by the heat pump comes from a low-temperature heat source.

Compared with the prior art, the present invention has achieved the following technical effects:

The solar energy coupled water source heat pump heating system and using method in the present invention, the main structure includes a solar heat collector, a domestic hot water storage tank, a heating storage tank, a heat pump, a first heat exchanger, and a second heat exchanger The controller, the low-temperature heat source side water pump, the heat collector pump, the middle water pump, the low-temperature heat source and the controller; through the controller to control the opening and closing of various valves and pumps in the system, different heating modes can be formed, so as to make full use of solar energy and provide users with Domestic hot water and heating.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without paying creative labor.

Fig. 1 is a structural schematic diagram of a solar energy coupled water source heat pump heating system of the present invention;

Fig. 2 is a structural schematic diagram of the solar direct heating mode in the method of using the solar energy coupling water source heat pump heating system of the present invention;

Fig. 3 is a structural schematic diagram of the solar indirect heating heat pump heating mode in the method of using the solar energy coupled water source heat pump heating system of the present invention;

Fig. 4 is a structural schematic diagram of the heating mode of the solar energy series heat pump in the method of using the solar energy coupled water source heat pump heating system of the present invention;

Fig. 5 is a structural schematic diagram of the heating mode of the heat pump alone in the method of using the solar energy coupling water source heat pump heating system of the present invention.

Explanation of reference signs: 1. Solar collector; 2. Domestic hot water storage tank; 3. Heating storage tank; 4. Heat pump; 5A, first heat exchanger; 5B, second heat exchanger; 6. Auxiliary electric heater; 7. Low temperature heat source side water pump; 8. Terminal circulating water pump; 9. Collector pump; 10. Intermediate water pump; 11. Secondary circulation pump; 12. Low temperature heat source; The second valve; 13C, the third valve; 13D, the fourth valve; 13E, the fifth valve; 13F, the sixth valve; 13G, the seventh valve; 13H, the eighth valve; 13I, the ninth valve; 13J, the tenth valve Valve; 13K, eleventh valve; 13L, twelfth valve; 13M, thirteenth valve.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one:

As shown in Figure 1, this embodiment provides a solar energy coupled water source heat pump 4 heating system, including a solar collector 1, a domestic hot water storage tank 2, a heating storage tank 3, a heat pump 4, a first Heat exchanger 5A, second heat exchanger 5B, low-temperature heat source side water pump 7 , heat collection pump 9 , intermediate water pump 10 , low-temperature heat source 12 and controller.

The main circulating water outlet of the solar heat collector 1 is connected with the first water inlet of the domestic hot water storage tank 2 through a first pipeline, and the first outlet of the domestic hot water storage tank 2 The water port is connected with the second water inlet of the heating water storage tank 3 through the second pipeline, and the second water outlet of the heating water storage tank 3 is connected with the main circulating water inlet of the solar heat collector 1 The third pipeline is connected; the outlet of the main circulating water is connected with the inlet of the main circulating water in the interior of the solar collector 1; the first water inlet and the first water outlet are in the living room The inside of the hot water storage tank 2 is connected; the second water inlet and the second water outlet are connected inside the heating storage tank 3; the third water inlet of the heat pump 4 is connected to the The fourth water outlet of the first heat exchanger 5A is connected through the fifth pipeline, and the fourth water inlet of the first heat exchanger 5A is connected with the fifth water outlet of the second heat exchanger 5B through the sixth pipeline. The pipelines are connected, and the fifth water inlet of the second heat exchanger 5B is connected with the third water outlet of the heat pump 4 through the seventh pipeline; the third water inlet is connected with the third water outlet at The inside of the heat pump 4 is connected; the fourth water outlet is connected to the fourth water inlet in the first heat exchanger 5A; the fifth water outlet is connected to the fifth water inlet. The inside of the second heat exchanger 5B is connected; the sixth water outlet of the heat pump 4 is connected to the heating user through the eighth pipeline; the sixth water inlet of the heat pump 4 is connected to the heating user through the ninth pipeline The sixth water outlet and the sixth water inlet are connected inside the heat pump 4; the seventh water inlet and the seventh water outlet of the second heat exchanger 5B are connected to the low-temperature heat source 12 are connected; the seventh water inlet and the seventh water outlet are connected inside the second heat exchanger 5B; the low temperature heat source 12 is provided between the seventh water inlet and the low temperature Heat source side water pump 7; the eighth water outlet of the first heat exchanger 5A communicates with the ninth water inlet of the heating water storage tank 3 through the tenth pipeline, and the eighth water outlet of the first heat exchanger 5A The eighth water inlet communicates with the ninth water outlet of the heating water storage tank 3 through an eleventh pipeline; the eleventh pipeline is provided with the intermediate water pump 10; the ninth water outlet is connected to the The eighth pipeline communicates with the twelfth pipeline; the eighth water outlet communicates with the eighth water inlet inside the first heat exchanger 5A; the ninth water outlet communicates with the first water inlet The ninth water inlet communicates with the interior of the heating water storage tank 3; the eighth water outlet communicates with the seventh pipeline through the thirteenth pipeline; the seventh pipeline communicates with the ninth pipeline. The pipelines are connected through the fourteenth pipeline; a fifteenth pipeline is also provided between the fifth pipeline and the eleventh pipeline, and a thirteenth valve 13M is arranged on the fifteenth pipeline A fourth pipeline is also provided between the main circulating water outlet of the solar heat collector 1 and the second water inlet of the heating water storage tank 3; a first valve 13A is provided on the fourth pipeline; The first pipeline is provided with a second valve 13B, and the third pipeline is provided with a third valve 13C, so A fourth valve 13D is provided on the tenth pipeline, a fifth valve 13E is provided on the sixth pipeline, a sixth valve 13F is provided on the thirteenth pipeline, and a seventh valve is provided on the seventh pipeline. 13G, an eighth valve 13H is set on the fourteenth pipeline, a ninth valve 13I is set on the twelfth pipeline, a tenth valve 13J is set on the eleventh pipeline, and the fifteenth pipeline An eleventh valve 13K is set on the road, a twelfth valve 13L is set on the eighth pipeline, and a thirteenth valve 13M is set on the ninth pipeline; the controller is used to control the first valve 13A, The second valve 13B, the third valve 13C, the fourth valve 13D, the fifth valve 13E, the sixth valve 13F, the seventh valve 13G, the eighth valve 13H, the The opening and closing of the ninth valve 13I, the tenth valve 13J, the eleventh valve 13K, the twelfth valve 13L, and the thirteenth valve 13M; the controller and the heat pump 4 , the low-temperature heat source side water pump 7, the heat collector pump 9 and the intermediate water pump 10 are electrically connected.

A terminal circulating water pump 8 is arranged on the eighth pipeline, and the terminal circulating water pump 8 is electrically connected to the controller.

The domestic hot water storage tank 2 is also provided with a replenishment pipe and a user hot water pipe.

An auxiliary electric heater 6 is also arranged on the domestic hot water storage tank 2, and the auxiliary electric heater 6 is electrically connected to the controller.

A secondary circulation pump 11 is arranged on the sixth pipeline, and the secondary circulation pump 11 is electrically connected to the controller.

Both the first water outlet and the second water outlet are provided with temperature sensors, and the temperature sensors are electrically connected to the controller.

This embodiment also provides a method for using the above-mentioned solar energy coupled water source heat pump 4 heating system, including the following five operating modes:

The first type, solar energy direct heating domestic hot water mode: when the water outlet temperature of the first water outlet of the domestic hot water storage tank 2 is lower than the set outlet water temperature of the domestic hot water storage tank 2, the first valve 13A is closed , open the second valve 13B and the third valve 13C, open the heat collector pump 9, the system directly uses the solar heat collector 1 to heat the water in the domestic hot water storage tank 2, and provides domestic hot water for hot water users;

The second type, solar direct heating mode: as shown in Figure 2, when the water temperature T of the second water outlet of the heating water storage tank 3 is higher than the set direct supply starting temperature Td, the system directly uses solar hot water for heating, At this time, the first valve 13A, the third valve 13C, the fourth valve 13D, the sixth valve 13F, the eighth valve 13H and the ninth valve 13I are all opened, and the second valve 13B, the fifth valve 13E, the seventh valve 13G, The tenth valve 13J, the eleventh valve 13K, the twelfth valve 13L and the thirteenth valve 13M are all closed, and the end circulating water pump 8 is turned on, and the secondary circulating pump 11, the heat pump 4, the low-temperature heat source side water pump 7 and the middle water pump are turned off 10;

The third, solar indirect heating heat pump 4 heating mode: as shown in Figure 3, when the outlet temperature T of the heating water storage tank 3 is lower than the set direct supply starting temperature Td, and higher than the maximum operating temperature Th of the heat pump 4 , the hot water in the heating water storage tank 3 directly transfers heat to the heating user side without passing through the evaporator in the heat pump 4. At this time, the first valve 13A, the third valve 13C, the fourth valve 13D, the fifth valve The valve 13E, the seventh valve 13G, the tenth valve 13J, the twelfth valve 13L and the thirteenth valve 13M are all opened, the second valve 13B, the sixth valve 13F, the eighth valve 13H, the ninth valve 13I and the eleventh valve The valves 13K are all closed, the low-temperature heat source side water pump 7, the end circulation water pump 8, the middle water pump 10, the secondary circulation pump 11 and the heat pump 4 are turned on, and the hot water in the heating water storage tank 3 passes through the first heat exchanger 5A to transfer heat Give the low-temperature heat source 12, raise the temperature of the water in the low-temperature heat source 12 entering the heat pump 4, and heat the user through the heat pump 4;

Fourth, heating mode of solar heat pump 4 in series: as shown in Figure 4, when the outlet temperature T of the heating water storage tank 3 is higher than the temperature Tw of the low-temperature heat source 12 and lower than the maximum operating temperature Th of the heat pump 4, at this time, the first The first valve 13A, the third valve 13C, the fourth valve 13D, the sixth valve 13F, the eleventh valve 13K, the twelfth valve 13L and the thirteenth valve 13M are all opened, the second valve 13B, the fifth valve 13E, the The seventh valve 13G, the eighth valve 13H, the ninth valve 13I and the tenth valve 13J are all closed, the end circulating water pump 8, the heat pump 4 and the middle water pump 10 are turned on, the low-temperature heat source side water pump 7 and the secondary circulating pump 11 are turned off, heating and heat storage The hot water in the water tank 3 directly enters the heat pump 4 for heat exchange, increases the temperature of the water entering the heat pump 4, and heats the user through the heat pump 4;

Fifth, heat pump 4 independent heating mode: as shown in Figure 5, when the outlet temperature T of the heating water storage tank 3 is lower than the temperature Tw of the low-temperature heat source 12, at this time, the first valve 13A, the third valve 13C, the second valve The fifth valve 13E, the seventh valve 13G, the twelfth valve 13L and the thirteenth valve 13M are all opened, the second valve 13B, the fourth valve 13D, the sixth valve 13F, the eighth valve 13H, the ninth valve 13I, the tenth valve Both the valve 13J and the eleventh valve 13K are closed, the low-temperature heat source side water pump 7, the terminal circulation water pump 8, the secondary circulation pump 11 and the heat pump 4 are turned on, the middle water pump 10 is closed, and the system stops taking heat from the heating water storage tank 3. When the heat pump 4 operates alone, the heat extracted by the heat pump 4 comes from the low-temperature heat source 12 .

It should be noted that when adopting the first mode, that is, solar energy directly heats domestic hot water, which heating mode the system adopts depends on the water temperature T of the second water outlet of the heating water storage tank 3; and when auxiliary electric heating is required When the heater 6 is auxiliary heating the domestic hot water storage tank 2, the second valve 13B is in a closed state, and the hot water heated by the auxiliary electric heater 6 is only used by hot water users.

In this description, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention; meanwhile, for those of ordinary skill in the art, according to this The idea of the invention will have changes in the specific implementation and scope of application. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (3)

1. a kind of solar energy Coupling Water-source Heat Pump heat supply heating system, which is characterized in that including solar thermal collector, domestic hot-water Hot water storage tank, heating hot water storage tank, heat pump, First Heat Exchanger, the second heat exchanger, Low Temperature Thermal land source side water pump, heat-collecting pump, intermediate water Pump, low-temperature heat source and controller；

First water inlet of the major cycle water out of the solar thermal collector and domestic hot-water's hot water storage tank passes through first Pipeline is connected, and the first water outlet of domestic hot-water's hot water storage tank and the second water inlet of the heating hot water storage tank pass through Second pipeline is connected, and the second water outlet of the heating hot water storage tank and the major cycle water inlet of the solar thermal collector are logical Third pipeline is crossed to be connected；

The major cycle water out is connected with the major cycle water inlet in the inside of the solar thermal collector；Described first Water inlet is connected with first water outlet in the inside of domestic hot-water's hot water storage tank；Second water inlet with it is described Second water outlet is connected in the inside of the heating hot water storage tank；

The third water inlet of the heat pump is connected with the 4th water outlet of the First Heat Exchanger by the 5th pipeline, and described 4th water inlet of one heat exchanger is connected with the 5th water outlet of second heat exchanger by the 6th pipeline, and described second changes 5th water inlet of hot device is connected with the third water outlet of the heat pump by the 7th pipeline；

The third water inlet is connected with the third water outlet in the inside of the heat pump；4th water outlet with it is described 4th water inlet is connected in the inside of the First Heat Exchanger；5th water outlet and the 5th water inlet are described the The inside of two heat exchangers is connected；

6th water outlet of the heat pump is connected with heating user by the 8th pipeline；6th water inlet of the heat pump and confession Warm user is connected by the 9th pipeline；

6th water outlet is connected with the 6th water inlet in the inside of the heat pump；

The 7th water inlet and the 7th water outlet of second heat exchanger are connected with the low-temperature heat source；7th water inlet Mouth is connected with the 7th water outlet in the inside of second heat exchanger；7th water inlet and the low-temperature heat source it Between be provided with the Low Temperature Thermal land source side water pump；

8th water outlet of the First Heat Exchanger is connected with the 9th water inlet of the heating hot water storage tank by the tenth pipeline Logical, the 8th water inlet of the First Heat Exchanger is connected with the 9th water outlet of the heating hot water storage tank by the 11st pipeline It is logical；The middle water pump is provided on 11st pipeline；9th water outlet and the 8th pipeline pass through the 12nd Pipeline is connected；

8th water outlet is connected with the 8th water inlet in the inside of the First Heat Exchanger；9th water outlet It is connected with the 9th water inlet in the inside of the heating hot water storage tank；

8th water outlet is connected with the 7th pipeline by the 13rd pipeline；7th pipeline and the 9th pipe Road is connected by the 14th pipeline；

It is additionally provided with the 15th pipeline between 5th pipeline and the 11st pipeline, is provided on the 15th pipeline 13rd valve；

It is additionally provided between the major cycle water out of the solar thermal collector and the second water inlet of the heating hot water storage tank 4th pipeline；The first valve is provided on 4th pipeline；

It is provided with the second valve on first pipeline, is provided with third valve on the third pipeline, on the tenth pipeline It is provided with the 4th valve, the 5th valve is provided on the 6th pipeline, is provided with the 6th valve on the 13rd pipeline, institute It states and is provided with the 7th valve on the 7th pipeline, the 8th valve is provided on the 14th pipeline, is set on the 12nd pipeline It is equipped with the 9th valve, the tenth valve is provided on the 11st pipeline, is provided with the 11st valve on the 15th pipeline, It is provided with the 12nd valve on 8th pipeline, is provided with the 13rd valve on the 9th pipeline；

The controller is for controlling first valve, second valve, the third valve, the 4th valve, institute State the 5th valve, the 6th valve, the 7th valve, the 8th valve, the 9th valve, the tenth valve, The opening and closing of 11st valve, the 12nd valve, the 13rd valve；

The controller is electrically connected with the heat pump, the Low Temperature Thermal land source side water pump, the heat-collecting pump and the middle water pump；

An end water circulating pump is provided on 8th pipeline, the end water circulating pump is electrically connected with the controller；

Electrical auxiliary heater, the electrical auxiliary heater and controller electricity are additionally provided on domestic hot-water's hot water storage tank Connection；

Secondary cycle pump is provided on 6th pipeline, the secondary cycle pump is electrically connected with the controller；

First water outlet and second water outlet are provided with temperature sensor, the temperature sensor and the control Device electrical connection processed.

2. solar energy Coupling Water-source Heat Pump heat supply heating system according to claim 1, which is characterized in that the life heat Water supply pipe and user's hot-water line are additionally provided on water hot water storage tank.

3. a kind of application method of the described in any item solar energy Coupling Water-source Heat Pump heat supply heating systems of claim 1-2, It is characterized in that, including following five kinds of operational modes:

The first, solar energy directly heat domestic hot-water's mode: the leaving water temperature of the first water outlet of domestic hot-water's hot water storage tank Lower than domestic hot-water's hot water storage tank setting leaving water temperature when, close the first valve, open the second valve and third valve, open Heat-collecting pump, system directly utilize the water in solar thermal collector heating domestic hot water's hot water storage tank, and for hot water, user provides life Hot water；

Second, solar energy direct heating mode: when the direct-furnish that the second water outlet water temperature T of heating hot water storage tank is higher than setting is opened When dynamic temperature Td, system is directly heated using solar water, at this point, the first valve, third valve, the 4th valve, Six valves, the 8th valve and the 9th valve are opened, the second valve, the 5th valve, the 7th valve, the tenth valve, the 11st valve Door, the 12nd valve and the 13rd valve are turned off, and open end water circulating pump, close secondary cycle pump, heat pump, Low Temperature Thermal Land source side water pump and middle water pump；

The third, solar energy indirect heating heat pump heating mode: when heating hot water storage tank outlet temperature T lower than setting direct-furnish open Dynamic temperature Td, but be higher than heat pump maximum operating temperature Th when, at this point, the first valve, third valve, the 4th valve, the 5th valve Door, the 7th valve, the tenth valve, the 12nd valve and the 13rd valve are opened, the second valve, the 6th valve, the 8th valve, 9th valve and the 11st valve are turned off, and open Low Temperature Thermal land source side water pump, end water circulating pump, middle water pump, secondary cycle Pump and heat pump, the hot water to heat in hot water storage tank transfer heat to low-temperature heat source by First Heat Exchanger, promote low-temperature heat source Water enters the temperature of the water in heat pump, is heated by heat pump to user；

4th kind, solar energy connect heat pump heating mode: when heating hot water storage tank outlet temperature T be higher than low-temperature heat source temperature Tw and Lower than heat pump maximum operating temperature Th when, at this point, the first valve, third valve, the 4th valve, the 6th valve, the 11st valve Door, the 12nd valve and the 13rd valve are opened, the second valve, the 5th valve, the 7th valve, the 8th valve, the 9th valve It is turned off with the tenth valve, opens end water circulating pump, heat pump and middle water pump, close Low Temperature Thermal land source side water pump and secondary cycle It pumps, the hot water in the hot water storage tank that heats is directly entered heat pump and exchanges heat, and the water temperature for entering heat pump is improved, by heat pump to user It heats；

5th kind, the independent heating mode of heat pump: when the hot water storage tank outlet temperature T that heats is lower than the temperature Tw of low-temperature heat source, this When, the first valve, third valve, the 5th valve, the 7th valve, the 12nd valve and the 13rd valve are opened, the second valve, 4th valve, the 6th valve, the 8th valve, the 9th valve, the tenth valve and the 11st valve are turned off, and open Low Temperature Thermal source Water pump, end water circulating pump, secondary cycle pump and heat pump close middle water pump, and system stops taking heat from heating hot water storage tank, this When heat pump isolated operation, heat pump extract heat from low-temperature heat source.