WO2019237451A1 - Heat supply heating system wherein solar energy is coupled with water source heat pump, and method for using same - Google Patents

Abstract

Disclosed are a heat supply heating system wherein solar energy is coupled with a water source heat pump, and a method for using same, which fall within the technical field of heat supply devices. The main structure of the system comprises a solar heat collector (1), a heat storage water tank for domestic hot water (2), a heat storage water tank for heating (3), a heat pump, a first heat exchanger (5A), a second heat exchanger (5B), a low-temperature heat source side water pump (7), a heat collection pump (9), a middle water pump (10), a low-temperature heat source (12) and a controller. By means of the controller controlling the opening and closing of valves and pumps in the system, the heat storage water tank for domestic hot water and the heat storage water tank for heating are operated in series, or, the heat storage water tank for heating is operated independently, which can form different heating modes, thereby making full use of solar energy so as to be able to supply domestic hot water and heat to users simultaneously.

Description

Solar coupled water source heat pump heating and heating system and using method Technical field

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

Background technique

With the year-on-year increase in building energy consumption, building energy saving and renewable energy utilization technologies have become the focus of many scholars' attention. Water source heat pump as a renewable energy application technology, its reasonable application can achieve good energy conservation 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 of heat can be obtained by inputting a small amount of electricity during heating. At the same time, solar energy, an easily available renewable energy auxiliary water source, is used. The heat pump system heats the building, which is of great practical significance to alleviate the environmental problems such as the depletion of fossil energy and the increasing haze in China.

The feasibility of solar-coupled water-source heat pump technology has become the consensus of many researchers. Studies show that this dual-heat source heating technology can solve the problem of too large collector area when solar energy is used for single heating, and can improve the low-temperature water source of heat pump units. Side water temperature, thereby improving the energy efficiency of the unit's operation and reducing the system's operating energy consumption. Single water source heat pump technology is relatively mature, and solar heating systems also have technical guidelines, but research on solar-water source combined heat pump systems in building heating, especially short-term heat storage solar coupled water source heat pump heating, is still insufficient. For solar short-term heat storage, because the solar energy has the characteristics of intermittent day and night and irregularities of daylight hours and intensity, the operation mode of the combined system becomes the key to improve the energy efficiency and reliability of the combined system. At present, the general operation mode of the solar-coupled water source heat pump is: while the solar heat is stored, different operating modes are selected in real time according to the outlet water temperature of the hot water storage tank, so as to make full use of the hot water in the water tank for heating. This operation mode effectively raises the water temperature on the low-temperature water source side of the heat pump, and the operation energy efficiency of the heat pump unit is improved accordingly, thereby saving the operating 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, which results in that the hot water in the water tank is directly used for heating for a short time, or The direct-supply temperature cannot be reached at all, so the heat pump unit needs a long time to open the heat. This mode of operation seems to be able to utilize solar energy in a timely manner, but research has found that it cannot maximize the system's operating energy efficiency due to the inadequate use of the advantages of solar direct heating.

Summary of the Invention

In order to solve the above technical problems, the present invention provides a solar-coupled water source heat pump heating and heating system and method, which can simultaneously provide domestic hot water and heating for users.

To achieve the above objective, the present invention provides the following solutions:

The invention provides a solar-coupled water source heat pump heating and heating system, which includes a solar heat 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, intermediate water pump, low temperature heat source and controller;

The main circulating water outlet of the solar heat collector is connected to 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 is connected to all 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 and the main circulating water inlet of the solar heat collector are connected through a third pipeline. ;

The main circulating water outlet and the main circulating water inlet are connected inside the solar heat collector; the first water inlet and the first water outlet are inside the domestic hot water storage tank Communicating; the second water inlet and the second water outlet communicate with each other inside the heating and hot water storage tank;

The third water inlet of the heat pump is in communication with the fourth water outlet of the first heat exchanger through a fifth pipeline, and the fourth water inlet of the first heat exchanger is in communication with the second heat exchanger. A fifth water outlet is communicated through a sixth pipeline, and a fifth water inlet of the second heat exchanger and a third water outlet of the heat pump are communicated through a seventh pipeline;

The third water inlet is in communication with the third water outlet inside the heat pump; the fourth water outlet is in communication with the fourth water inlet inside the first heat exchanger; the A fifth water outlet is in communication with the fifth water inlet inside the second heat exchanger;

The sixth water outlet of the heat pump is in communication with the heating user through an eighth pipeline; the sixth water inlet of the heat pump is in communication with the heating user through a ninth pipeline;

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

The seventh water inlet and the seventh water outlet of the second heat exchanger are both in communication with 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 provided between the seventh water inlet and the low-temperature heat source;

The eighth water outlet of the first heat exchanger is in communication with the ninth water inlet of the heating water storage tank through a tenth pipe, and the eighth water inlet of the first heat exchanger is connected to the heating water storage. The ninth water outlet of the hot water tank is connected through an eleventh pipeline; the eleventh pipeline is provided with the intermediate water pump; the ninth water outlet and the eighth pipeline are connected through a twelfth pipeline Connected

The eighth water outlet is in communication with the eighth water inlet inside the first heat exchanger; the ninth water outlet and the ninth water inlet are connected inside the heating and heat storage tank through;

The eighth water outlet is in communication with the seventh pipeline through a thirteen pipeline; the seventh pipeline and the ninth pipeline are communicated through a fourteenth pipeline;

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

A fourth pipeline is further 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 arranged on the fourth pipeline;

A second valve is provided on the first pipeline, a third valve is provided on the third pipeline, a fourth valve is provided on the tenth pipeline, and a fifth valve is provided on the sixth pipeline. A 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. 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, an end circulating water pump is provided on the eighth pipeline, and the end circulating water pump is electrically connected to the controller.

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

Optionally, an auxiliary electric heater is further 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, a temperature sensor is provided at the first water outlet and the second water outlet, and the temperature sensor is electrically connected to the controller.

The invention also provides a method for using the solar-coupled water source heat pump heating and heating system, which includes the following five operation modes:

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

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

Third, the solar indirect heating heat pump heating mode: When the temperature T of the hot water storage tank outlet is lower than the set direct supply start temperature Td and higher than the maximum working temperature Th of the heat pump, at this time, the first valve, the first valve, the first Three, fourth, fifth, seventh, tenth, twelfth and thirteenth valves are open, and second, sixth, eighth, ninth and eleventh valves are open. The valves are all closed, the low-temperature heat source side pump, the end circulating water pump, the intermediate water pump, the secondary circulation pump and the heat pump are turned on. The hot water in the heating water storage tank passes the heat to the low-temperature heat source through the first heat exchanger, thereby improving the low-temperature heat source water. The temperature of the water entering the heat pump, which heats the user through the heat pump;

Fourth, solar energy series heat pump heating mode: When the temperature T of the hot water storage tank outlet is higher than the low temperature heat source temperature Tw and lower than the maximum operating 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 opened, and the second valve, the fifth valve, the seventh valve, the eighth valve, the ninth valve, and the tenth valve are all closed, and the ends are opened 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 water 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 separate heating mode: When the temperature T of the hot water storage tank outlet 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 thirteenth valves are open, the second, fourth, sixth, eighth, ninth, tenth, and eleventh valves are closed, and the low-temperature heat source side pump, the end circulating water pump, and the two The secondary circulation pump and the heat pump are turned off, and the system stops taking heat from the heating water storage tank. At this time, the heat pump is running independently, and the heat extracted by the heat pump comes from the low-temperature heat source.

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

The solar-coupled water-source heat pump heating and 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 water storage tank, a heat pump, a first heat exchanger, and a second heat exchange Heaters, low-temperature heat source side pumps, heat-collecting pumps, intermediate water pumps, low-temperature heat sources, and controllers; the controller can control the opening and closing of valves and pumps in the system to form different heating modes, thereby making full use of solar energy while providing users with Domestic hot water and heating.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic structural diagram of a solar-coupled water source heat pump heating and heating system according to the present invention;

2 is a schematic structural diagram of a direct solar heating mode in a method of using a solar-coupled water source heat pump heating system according to the present invention;

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

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

FIG. 5 is a schematic structural diagram of a single heating mode of a heat pump in a method of using a solar-coupled water source heat pump heating system according to the present invention.

DESCRIPTION OF SYMBOLS: 1. Solar collector; 2. Domestic hot water storage tank; 3. Heating water storage tank; 4. Heat pump; 5A, first heat exchanger; 5B, second heat exchanger; 6. Auxiliary electric heater; 7. Low-temperature heat source side pump; 8. End circulating water pump; 9. Heat collecting pump; 10. Intermediate water pump; 11. Secondary circulating pump; 12. Low temperature heat source; 13A; First valve; 13B, Second valve; 13C, third valve; 13D, fourth valve; 13E, fifth valve; 13F, sixth valve; 13G, seventh valve; 13H, eighth valve; 13I, ninth valve; 13J, tenth Valve; 13K, eleventh valve; 13L, twelfth valve; 13M, thirteenth valve.

detailed description

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Embodiment one:

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

The main circulating water outlet of the solar heat collector 1 and the first water inlet of the domestic hot water storage tank 2 are communicated through a first pipeline, and the first outlet of the domestic hot water storage tank 2 The water outlet is in communication with the second water inlet of the heating water storage tank 3 through a second pipeline, and the second water outlet of the heating water storage tank 3 and the main circulating water inlet of the solar heat collector 1 pass through The third pipeline is connected; the main circulating water outlet and the main circulating water inlet are connected inside the solar heat collector 1; the first water inlet and the first water outlet are in the living The inside of the hot water storage tank 2 is in communication; the second water inlet and the second outlet are connected in the heating water storage tank 3; the third water inlet of the heat pump 4 is connected to all The fourth water outlet of the first heat exchanger 5A is communicated through a fifth pipeline, and the fourth water inlet of the first heat exchanger 5A and the fifth water outlet of the second heat exchanger 5B are connected through a sixth The pipeline is connected, and the fifth water inlet of the second heat exchanger 5B and the third water outlet of the heat pump 4 are communicated through a seventh pipeline; The third water inlet is in communication with the third water outlet inside the heat pump 4; the fourth water outlet is in communication with the fourth water inlet inside the first heat exchanger 5A; the A fifth water outlet is connected to the fifth water inlet inside the second heat exchanger 5B; a sixth water outlet of the heat pump 4 is connected to a heating user through an eighth pipeline; the heat pump 4 The sixth water inlet is connected with the heating user through a ninth pipeline; the sixth water outlet and the sixth water inlet are communicated inside the heat pump 4; the seventh inlet of the second heat exchanger 5B The water inlet and the seventh water outlet are both in communication with the low-temperature heat source 12; the seventh water inlet and the seventh water outlet are in the interior of the second heat exchanger 5B; the seventh water inlet is in communication with The low-temperature heat source side water pump 7 is arranged between the low-temperature heat sources 12; the eighth water outlet of the first heat exchanger 5A and the ninth water inlet of the heating and storage tank 3 are connected through a tenth pipe The eighth water inlet of the first heat exchanger 5A and the ninth water outlet of the heating water storage tank 3 pass through the eleventh pipeline. Communication; the eleventh pipeline is provided with the intermediate water pump 10; the ninth water outlet is in communication with the eighth pipeline through a twelfth pipeline; the eighth water outlet is in communication with the eighth The water inlet is in communication with the inside of the first heat exchanger 5A; the ninth water outlet is in communication with the ninth water inlet in the heating and thermal storage tank 3; the eighth water outlet is in communication with The seventh pipeline communicates with the thirteenth pipeline; the seventh pipeline communicates with the ninth pipeline through the fourteenth pipeline; the fifth pipeline communicates with the eleventh pipeline A fifteenth pipeline is also provided between the roads, and the thirteenth pipeline is provided with a thirteenth valve 13M; the main circulating water outlet of the solar heat collector 1 and the first fifteenth of the heating and thermal storage tank 3 A fourth pipeline is also provided between the two water inlets; a first valve 13A is arranged on the fourth pipeline; a second valve 13B is arranged on the first pipeline; and a third valve is arranged on the third pipeline 13C, a fourth valve 13D is provided on the tenth pipeline, a fifth valve 13E is provided on the sixth pipeline, and a thirteenth pipeline is provided There is a sixth valve 13F, a seventh valve 13G is provided on the seventh line, an eighth valve 13H is provided on the fourteenth line, and a ninth valve 13I is provided on the twelfth line. A tenth valve 13J is provided on the eleventh pipeline, an eleventh valve 13K is provided on the fifteenth pipeline, a twelfth valve 13L is provided on the eighth pipeline, and a tenth is provided on the ninth pipeline. Three valves 13M; 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, and the sixth valve 13F, the seventh valve 13G, the eighth valve 13H, the ninth valve 13I, the tenth valve 13J, the eleventh valve 13K, the twelfth valve 13L, the tenth valve The three valves 13M are opened and closed; the controller is electrically connected to the heat pump 4, the low-temperature heat source side water pump 7, the heat collection pump 9, and the intermediate water pump 10.

An end circulating water pump 8 is provided on the eighth pipeline, and the end circulating water pump 8 is electrically connected to the controller.

The domestic hot water storage tank 2 is further provided with a water supply pipe and a user hot water pipe.

The domestic hot water storage tank 2 is further provided with an auxiliary electric heater 6, and the auxiliary electric heater 6 is electrically connected to the controller.

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

A temperature sensor is provided at each of the first water outlet and the second water outlet, and the temperature sensor is electrically connected to the controller.

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

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

Second, direct solar heating mode: As shown in Fig. 2, when the water temperature T of the second outlet of the heating water storage tank 3 is higher than the set direct supply start 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, the secondary circulating pump 11, the heat pump 4, the low-temperature heat source side water pump 7 and the intermediate water pump are turned off. 10;

Third, the heating mode of solar indirect heating heat pump 4: As shown in FIG. 3, when the outlet temperature T of the heating water storage tank 3 is lower than the set direct supply start temperature Td and higher than the maximum operating temperature Th of the heat pump 4 The hot water in the heating hot water storage tank 3 directly transfers heat to the heating user 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, and the fifth The valve 13E, the seventh valve 13G, the tenth valve 13J, the twelfth valve 13L, and the thirteenth valve 13M are all opened, and 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, and the low-temperature heat source-side water pump 7, the end circulating water pump 8, the intermediate water pump 10, the secondary circulating pump 11, and the heat pump 4 are turned on. The hot water in the heating water storage tank 3 passes the heat through the first heat exchanger 5A. Give the low-temperature heat source 12 to raise the temperature of the water entering the heat pump 4 from the low-temperature heat source 12 and heat the user through the heat pump 4;

Fourth, the heating mode of the solar series heat pump 4: As shown in FIG. 4, when the temperature T of the outlet 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, and the second valve 13B, the fifth valve 13E, the first valve Seven valves 13G, eighth valve 13H, ninth valve 13I and tenth valve 13J are all closed, the end circulating water pump 8, the heat pump 4 and the intermediate water pump 10 are turned on, and the low-temperature heat source side water pump 7 and the secondary circulation pump 11 are turned off for 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, the heating mode of the heat pump 4 alone: As shown in FIG. 5, when the temperature T of the outlet 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 third valve The five valves 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, and the tenth valve. The valve 13J and the eleventh valve 13K are both closed, the low-temperature heat source side water pump 7, the end circulating water pump 8, the secondary circulating pump 11 and the heat pump 4 are turned on, and the intermediate water pump 10 is turned off. 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 the first type is the solar direct heating domestic hot water mode, which heating mode the system specifically uses depends on the water temperature T of the second outlet of the heating water storage tank 3; and when auxiliary electric heating is needed When the heater 6 assists the domestic hot water storage tank 2 with auxiliary heating, 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.

The embodiments of the present invention have been described in detail above with reference to the drawings, but the present invention is not limited to the above embodiments, and can be made within the scope of the knowledge possessed by a person of ordinary skill in the art without departing from the spirit of the present invention. Various changes.

Claims (7)

1. A solar-coupled water source heat pump heating and heating system, characterized in that it includes a solar heat 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, intermediate water pump, low temperature heat source and controller;

   The main circulating water outlet of the solar heat collector is connected to 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 is connected to all 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 and the main circulating water inlet of the solar heat collector are connected through a third pipeline. ;

   The main circulating water outlet and the main circulating water inlet are connected inside the solar heat collector; the first water inlet and the first water outlet are inside the domestic hot water storage tank Communicating; the second water inlet and the second water outlet communicate with each other inside the heating and hot water storage tank;

   The third water inlet of the heat pump is in communication with the fourth water outlet of the first heat exchanger through a fifth pipeline, and the fourth water inlet of the first heat exchanger is in communication with the second heat exchanger. A fifth water outlet is communicated through a sixth pipeline, and a fifth water inlet of the second heat exchanger and a third water outlet of the heat pump are communicated through a seventh pipeline;

   The third water inlet is in communication with the third water outlet inside the heat pump; the fourth water outlet is in communication with the fourth water inlet inside the first heat exchanger; the A fifth water outlet is in communication with the fifth water inlet inside the second heat exchanger;

   The sixth water outlet of the heat pump is in communication with the heating user through an eighth pipeline; the sixth water inlet of the heat pump is in communication with the heating user through a ninth pipeline;

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

   The seventh water inlet and the seventh water outlet of the second heat exchanger are both in communication with 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 provided between the seventh water inlet and the low-temperature heat source;

   The eighth water outlet of the first heat exchanger is in communication with the ninth water inlet of the heating water storage tank through a tenth pipe, and the eighth water inlet of the first heat exchanger is connected to the heating water storage. The ninth water outlet of the hot water tank is connected through an eleventh pipeline; the eleventh pipeline is provided with the intermediate water pump; the ninth water outlet and the eighth pipeline are connected through a twelfth pipeline Connected

   The eighth water outlet is in communication with the eighth water inlet inside the first heat exchanger; the ninth water outlet and the ninth water inlet are connected inside the heating and heat storage tank through;

   The eighth water outlet is in communication with the seventh pipeline through a thirteen pipeline; the seventh pipeline and the ninth pipeline are communicated through a fourteenth pipeline;

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

   A fourth pipeline is further 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 arranged on the fourth pipeline;

   A second valve is provided on the first pipeline, a third valve is provided on the third pipeline, a fourth valve is provided on the tenth pipeline, and a fifth valve is provided on the sixth pipeline. A 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. 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.
2. The solar-coupled water source heat pump heating and heating system according to claim 1, wherein an end-circulating water pump is provided on the eighth pipeline, and the end-circulating water pump is electrically connected to the controller.
3. The solar-coupled water source heat pump heating and heating system according to claim 1, wherein the domestic hot water storage tank is further provided with a water supply pipe and a user hot water pipe.
4. The solar-coupled water source heat pump heating and heating system according to claim 1, wherein the domestic hot water storage tank is further provided with an auxiliary electric heater, and the auxiliary electric heater is electrically connected to the controller. connection.
5. The solar-coupled water source heat pump heating and heating system according to claim 1, wherein a secondary circulation pump is provided on the sixth pipeline, and the secondary circulation pump is electrically connected to the controller.
6. The solar-coupled water source heat pump heating and heating system according to claim 1, wherein a temperature sensor is provided at the first water outlet and the second water outlet, and the temperature sensor and the controller are electrically connected to each other. connection.
7. A method for using a solar-coupled water source heat pump heating and heating system according to claims 1-6, comprising the following five operation modes:

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

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

   Third, the solar indirect heating heat pump heating mode: When the temperature T of the hot water storage tank outlet is lower than the set direct supply start temperature Td and higher than the maximum working temperature Th of the heat pump, at this time, the first valve, the first valve, the first Three, fourth, fifth, seventh, tenth, twelfth and thirteenth valves are open, and second, sixth, eighth, ninth and eleventh valves are open. The valves are all closed, the low-temperature heat source side pump, the end circulating water pump, the intermediate water pump, the secondary circulation pump and the heat pump are turned on. The hot water in the heating water storage tank passes the heat to the low-temperature heat source through the first heat exchanger, thereby improving the low-temperature heat source water. The temperature of the water entering the heat pump, which heats the user through the heat pump;

   Fourth, solar energy series heat pump heating mode: When the temperature T of the hot water storage tank outlet is higher than the low temperature heat source temperature Tw and lower than the maximum operating 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 opened, and the second valve, the fifth valve, the seventh valve, the eighth valve, the ninth valve, and the tenth valve are all closed, and the ends are opened 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 water 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 separate heating mode: When the temperature T of the hot water storage tank outlet 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 thirteenth valves are open, the second, fourth, sixth, eighth, ninth, tenth, and eleventh valves are closed, and the low-temperature heat source side pump, the end circulating water pump, and the two The secondary circulation pump and the heat pump are turned off, and the system stops taking heat from the heating water storage tank. At this time, the heat pump is running independently, and the heat extracted by the heat pump comes from the low-temperature heat source.

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