Composite heat pump heating and cooling system

Abstract

The utility model discloses a composite heat pump heating and cooling system which comprises a solar heat collection assembly, a ground source heat pump unit and a household ground source heat pump unit, and the solar heat collection assembly is used for supplying hot water to a user side; in winter, the first control valve is opened, the third valve is closed, the ground source heat pump unit provides a low-level heat source for the household ground source heat pump unit, and the household ground source heat pump unit supplies heat to a user side; under the condition of strong sunlight in winter, the first control valve is closed, the third valve is opened, the ground source heat pump unit and the solar heat collection assembly jointly provide a low-level heat source for the household ground source heat pump unit, and the energy utilization rate is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of heating, and in particular to a composite heat pump heating and cooling system. Background Art

[0002] Currently, electricity is the primary method for heating and cooling. As energy and environmental pollution become increasingly serious, people are looking for clean, pollution-free energy alternatives. Heat pump technology has attracted particular attention.

[0003] In rural areas, coal-fired boilers are often used for heating in winter because electric heaters consume a lot of electricity and are expensive. This results in high levels of pollutants and damages the environment. Heat pumps offer a high coefficient of performance and low operating costs. They extract heat from low-level heat sources while consuming only a small amount of energy, providing more heat. They can also be used for cooling in the summer. Ground-source heat pumps are less susceptible to environmental variations in different rural areas, making them suitable for heating and cooling in rural areas.

[0004] Solar energy is a universal, clean, and pollution-free renewable energy source. Using solar energy to heat water is pollutant-free and environmentally friendly. While solar energy is significantly affected by the external environment and exhibits intermittent and unstable characteristics, coupling it with a heat pump system can effectively address these issues while also increasing solar energy utilization. Therefore, a heating and cooling system that couples these two energy sources is needed. Summary of the Invention

[0005] In view of the above technical problems existing in the prior art, the present invention provides a composite heat pump heating and cooling system to improve energy utilization efficiency.

[0006] The present invention discloses a composite heat pump heating and cooling system, comprising a solar heat collection component and a ground source heat pump unit, wherein the solar heat collection component comprises a solar collector, a solar water tank and a heat exchange coil installed in the solar water tank, the solar collector is connected to the solar water tank, and the output end of the solar water tank is connected to the user side; the first end of the ground source heat pump unit is connected to one port of the low-level heat source of the household ground source heat pump unit through a first control valve, and the other port of the low-level heat source of the household ground source heat pump unit is connected to the second end of the ground source heat pump unit; the supply end of the household ground source heat pump unit is connected to the user side; the first end is connected to one end of the heat exchange coil through a third valve, and the other end of the heat exchange coil is connected to one port of the low-level heat source of the household ground source heat pump unit.

[0007] Preferably, the two ports of the supply end are respectively provided with a fifth valve and a sixth valve; the output end of the solar water tank is provided with a seventh valve; the solar water tank is also provided with a water supply port, which is connected to tap water.

[0008] Preferably, the input end and output end of the solar thermal collector are respectively provided with a first valve and a second valve; the output end or the input end of the solar thermal collector is provided with a first circulation pump; and the other end of the heat exchange coil is provided with a fourth valve.

[0009] Preferably, a second circulation pump is provided on one port or the other port of the low-level heat source of the household ground-source heat pump unit.

[0010] Preferably, it further comprises a cooling component, the cooling component comprising a cooling tower, and a third control valve is provided on another port of the low-level heat source of the household ground-source heat pump unit.

[0011] The input end and the output end of the cooling tower are respectively connected to the two ends of the third control valve.

[0012] Preferably, a fifth control valve and a sixth control valve are respectively provided at the input end and the output end of the cooling tower.

[0013] Preferably, a third circulation pump is provided at the input end or the output end of the cooling tower.

[0014] Preferably, a temperature sensor is provided in the solar water tank.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the solar thermal collection component is used to supply hot water to the user side; in winter, the first control valve is opened and the third valve is closed, and the ground source heat pump unit provides a low-level heat source for the household ground source heat pump unit, and the household ground source heat pump unit provides heating for the user side; in winter when the sunlight is strong, the first control valve is closed and the third valve is opened, and the ground source heat pump unit and the solar thermal collection component jointly provide a low-level heat source for the household ground source heat pump unit, thereby improving energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a logic block diagram of the composite heat pump heating and cooling system of the present utility model.

[0017] Markings in the figure: 1 solar thermal collection component, 11 solar thermal collector, 12 first valve, 13 first circulation pump, 14 solar water tank, 15 heat exchange coil, 16 second valve, 17 water supply port, 18 third valve, 19 fourth valve, 2 household ground source heat pump unit, 21 fifth valve, 22 sixth valve, 3 user side, 37 seventh valve, 5 cooling component, 51 cooling tower, 53 third circulation pump, 55 fifth control valve, 56 sixth control valve, 57 water supply end, 8 ground source heat pump unit, 81 first control valve, 82 second circulation pump, 83 third control valve. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0019] The present invention is described in further detail below with reference to the accompanying drawings:

[0020] A composite heat pump heating and cooling system, such as Figure 1 , comprising a solar thermal collection assembly 1 and a ground-source heat pump unit 8. The solar thermal collection assembly 1 includes a solar collector 11, a solar water tank 14, and a heat exchange coil 15 installed within the solar water tank 14. The solar collector 11 is connected to the solar water tank 14. The output end of the solar water tank 14 is connected to the user side 3 for supplying hot water to the user side, such as a bathtub on the user side. The first end of the ground-source heat pump unit 8 is connected to one port of the low-level heat source of the household ground-source heat pump unit 2 via a first control valve 81. The other port of the low-level heat source of the household ground-source heat pump unit 2 is connected to the second end of the ground-source heat pump unit 8. The supply end of the household ground-source heat pump unit 2 is connected to the user side 3. The first end is connected to one end of the heat exchange coil 15 via a third valve 18. The other end of the heat exchange coil 15 is connected to one port of the low-level heat source of the household ground-source heat pump unit 2.

[0021] The solar thermal collection assembly 1 is used to supply hot water to the user side; in winter, the first control valve 81 is opened and the third valve 18 is closed, and the ground source heat pump unit 8 is used to provide a low-level heat source for the household ground source heat pump unit 2, and the household ground source heat pump unit 2 provides heating for the user side; in winter when the sunlight is strong, the first control valve 81 is closed and the third valve 18 is opened, and the ground source heat pump unit 8 and the heat exchange coil 15 jointly provide a low-level heat source for the household ground source heat pump unit 2, thereby improving energy utilization.

[0022] More specifically, a temperature sensor may be provided in the solar water tank 14. When the water temperature in the solar water tank 14 exceeds a threshold, the heat exchange coil 15 is connected; when the water temperature is below the threshold, the heat exchange coil 15 is disconnected.

[0023] The two ports on the supply side are respectively provided with a fifth valve 21 and a sixth valve 22; the output end of the solar water tank 14 is provided with a seventh valve 37, providing more precise control. The solar water tank 14 is also provided with a water supply port 17, which is connected to tap water.

[0024] The input and output ends of the solar collector 11 are respectively provided with a first valve 12 and a second valve 16 ; the output or input end of the solar collector is provided with a first circulation pump 13 ; the other end of the heat exchange coil 15 is provided with a fourth valve 19 .

[0025] A second circulation pump 82 is provided on one or the other port of the low-level heat source of the household ground-source heat pump unit 2 .

[0026] Figure 1 Also shown is a cooling assembly 5 for providing additional cooling in the summer. The cooling assembly 5 includes a cooling tower 51. A third control valve 83 is provided at the other port of the low-level heat source of the household ground-source heat pump unit 2. The input and output of the cooling tower 51 are connected to the ends of the third control valve 83. A fifth control valve 55 and a sixth control valve 56 may be provided at the input and output of the cooling tower 51, respectively. A third circulating pump 53 may be provided at either the input or output of the cooling tower 51. The cooling tower 51 also has a water supply port 57 for access to tap water.

[0027] When cooling is not required, the third control valve 83 is opened and the fifth control valve 55 and the sixth control valve 56 are closed. In summer, when cooling is required, the ground source heat pump unit 8 provides cooling. When the cooling capacity is further increased, the third control valve 83 is closed, and the fifth control valve 55 and the sixth control valve 56 are opened to connect the cooling tower to the cooling cycle for joint cooling.

[0028] The utility model cooperates with the solar heat collection component, the household ground source heat pump unit and the cooling component to provide heating and cooling for users. The access of the solar heat collection component and the cooling component can be adjusted according to the needs of heating and cooling to ensure the heating and cooling needs, and can improve the utilization rate of energy, especially the utilization of solar energy and geothermal energy.

[0029] The output side of the household ground-source heat pump unit can utilize a direct expansion system, eliminating the heat exchange process with the medium and achieving higher efficiency. The low-level heat source ground-source heat pump unit 2 utilizes shallow geothermal energy extracted by a buried pipe heat exchanger. A cooling tower serves as an auxiliary cooling source in summer and solar energy as an auxiliary heat source in winter. Hot water provided by solar collectors can also be used for bathing year-round. Heat can also be added to the ground during the transitional season. Ground-source heat pump units offer a high coefficient of performance and low operating costs. By adding auxiliary equipment in both winter and summer, they ensure effective heating and cooling while preventing thermal imbalances in the underground soil.

[0030] The solar collector 11 and the solar water tank 14 are connected by pipes to form the first circulation pipeline of the solar heat collection assembly 1. The household ground source heat pump unit 2 and the ground source heat pump unit 8 are connected by pipes to form a second circulation pipeline for independent heating and cooling. The household ground source heat pump unit 2, the ground source heat pump unit 8 and the heat exchange coil 5 in the water tank are connected by pipes to form a third circulation pipeline for combined heating. The household ground source heat pump unit 2, the buried pipe heat exchanger and the cooling tower 51 are connected by pipes to form a fourth circulation pipeline for combined cooling. The household ground source heat pump unit 2 and the user side 3 are connected by pipes to form a fifth circulation pipeline for heating or cooling the user side.

[0031] The specific operation mode is:

[0032] 1. Independent heating: When there is insufficient sunlight in winter, or the heating of the ground source heat pump unit 8 is obviously sufficient, the heat source side of the household ground source heat pump unit 8 is connected to the household ground source heat pump unit 2 through the first control valve 81 and the second circulation pump 82. The third control valve 83 is opened, and the fifth control valve 55 and the sixth control valve 56 are closed. The medium in the buried pipe heat exchanger is used as the low-level heat source. After being lifted by the household ground source heat pump unit 2, it is heated to the user through the fifth valve / sixth valve, and a cycle is formed.

[0033] 2. Combined heating: When the sunlight intensity is high in winter, the solar collector absorbs solar energy, raising the water temperature in the solar water tank. The first control valve 81 is closed, and the third valve 18 and the fourth valve 19 are opened. The medium in the buried heat exchanger absorbs the heat energy of the solar water tank 15 through the heat exchange coil 15 and is transported to the household ground-source heat pump unit 2, which provides heating for the user.

[0034] 3. Independent Cooling: In summer, when the ground-source heat pump unit 8 is centrally responsible for indoor cooling, the household ground-source heat pump unit 2 uses the medium in the ground heat exchanger as a low-level heat source to provide cooling for the user. The opening and closing states of each valve are the same as those for independent heating. Heat can be stored in the ground.

[0035] 4. Combined cooling: When the ambient temperature is too high in summer and the cooling load of the geothermal heat cannot meet the indoor cooling demand, open the fifth valve 21, the sixth valve 22 and the cooling tower 51, as well as the third circulation pump 53, close the third control valve 83, and open the first control valve 81, close the third valve 18 and the fourth valve 19, connect the cooling tower 51, and use the medium passing through the cooling tower 51 and the geothermal heat pump unit 8 to provide cooling for the household geothermal heat pump unit. It should be noted that the connection method of the cooling tower is not limited to Figure 1 It can also be installed on the side close to the second circulation pump 82.

[0036] In addition, the solar thermal collection assembly 1 can also independently supply hot water to the user side, such as by connecting it to a bathtub. In this case, the first valve 12, the first circulation pump 13, the second valve 16, and the seventh valve 37 can be opened; the third valve 18 and the fourth valve 19 can be opened and closed according to the state of the combined heating.

[0037] In addition, a management module may be provided as required, and the management module is connected to each valve and circulation pump to control the connection between the valve and the circulation pump. The processor of the management module may be an MCU processor, but is not limited thereto.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A composite heat pump heating and cooling system, characterized in that: It comprises a solar heat collection component (1) and a ground source heat pump unit (8), The solar heat collection assembly (1) comprises a solar heat collector (11), a solar water tank (14), and a heat exchange coil (15) installed in the solar water tank (14). The solar heat collector (11) is connected to the solar water tank (14), and the output end of the solar water tank (14) is connected to the user side (3); The first end of the ground source heat pump unit (8) is connected to a first port of the low-level heat source of the household ground source heat pump unit (2) through a first control valve (81), and the other port of the low-level heat source of the household ground source heat pump unit (2) is connected to the second end of the ground source heat pump unit (8); The supply end of the household ground source heat pump unit (2) is connected to the user side (3); The first end is connected to one end of the heat exchange coil (15) through a third valve (18), and the other end of the heat exchange coil (15) is connected to a low-level heat source port of the household ground-source heat pump unit (2).

2. The composite heat pump heating and cooling system according to claim 1, characterized in that: The two ports of the supply end are respectively provided with a fifth valve (21) and a sixth valve (22); The output end of the solar water tank (14) is provided with a seventh valve (37); The solar water tank (14) is also provided with a water supply port (17), and the water supply port (17) is connected to tap water.

3. The composite heat pump heating and cooling system according to claim 1, characterized in that: The input end and the output end of the solar thermal collector (11) are respectively provided with a first valve (12) and a second valve (16); The output end or the input end of the solar thermal collector (11) is provided with a first circulation pump (13); A fourth valve (19) is provided at the other end of the heat exchange coil (15).

4. The composite heat pump heating and cooling system according to claim 1, characterized in that: A second circulation pump (82) is provided on one or the other port of the low-level heat source of the household ground-source heat pump unit (2).

5. The composite heat pump heating and cooling system according to claim 1, characterized in that: It also includes a cooling assembly (5), wherein the cooling assembly (5) includes a cooling tower (51), A third control valve (83) is provided on the other port of the low-level heat source of the household ground-source heat pump unit (2). The input end and the output end of the cooling tower (51) are respectively connected to the two ends of the third control valve (83).

6. The composite heat pump heating and cooling system according to claim 5, characterized in that: The input end and the output end of the cooling tower (51) are respectively provided with a fifth control valve (55) and a sixth control valve (56).

7. The composite heat pump heating and cooling system according to claim 5, characterized in that: A third circulation pump (53) is provided at the input end or the output end of the cooling tower (51).

8. The composite heat pump heating and cooling system according to claim 1, characterized in that: A temperature sensor is provided in the solar water tank (14).

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