A dual-source heat pump heating system

Abstract

This invention relates to the field of heat pump heating technology, specifically to a dual-source heat pump heating system, comprising: a heat pump unit, whose evaporator end is circulatedly connected to an energy storage device, and whose condenser end is connected to a user end through a second circulation pipeline; an auxiliary heat source, circulatedly connected to the energy storage device; and an energy storage circulation pipeline connected in parallel to the second circulation pipeline, with the energy storage device installed within the energy storage circulation pipeline. Without the need for additional energy storage devices, simply adding an energy storage circulation pipeline enables the dual-source heat pump heating system to operate within a high-efficiency range while adjusting its output mode according to the user's heating demand. Excess heat can be stored in the energy storage device for use during peak energy consumption periods. This effectively solves the defects of insufficient output power of heat pump units during peak energy consumption periods and excessive output power during off-peak energy consumption periods, enabling full utilization of heat and reducing energy waste in the dual-source heat pump heating system.

Description

Technical Field

[0001] This invention relates to the field of heat pump heating technology, and more specifically to a dual-source heat pump heating system. Background Technology

[0002] Heat pump technology is a technology that uses high-grade energy to transfer heat from a low-grade heat source to a high-grade heat source. In other words, it converts low-grade heat sources that cannot be directly used, such as air, soil, water, solar energy, and industrial waste heat, into usable high-grade heat sources, thereby achieving partial savings in primary energy consumption.

[0003] Dual-source heat pumps differ from ordinary heat pumps in that they can use both water and air sources as a single heat source. In existing dual-source heat pumps, the heat energy collected by solar energy is stored in a heat storage device and used as water source heat energy; when solar energy is insufficient, it is converted to heat energy collected from the air. For example... Figure 1 As shown, heat energy from sources such as solar energy is recovered into a storage tank. This storage tank is connected to the evaporator of the heat pump unit to heat the unit, while the condenser of the heat pump unit supplies heat to the user. Through automatic switching of the heat source, the heat pump unit ensures it always operates within a high-efficiency range, achieving high energy efficiency. However, the user's heat demand during the day is much greater than at night. Since the heat pump can only adjust its operating efficiency at the input end, during peak energy consumption periods, the heat energy obtained from the heat pump is insufficient, while during off-peak periods, the heat pump's output power far exceeds the user's demand, resulting in energy waste. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the existing dual-source heat pump system, which has insufficient output power during peak energy consumption periods and excessive output power during low energy consumption periods, resulting in energy waste, and thus provides a dual-source heat pump heating system.

[0005] To address the aforementioned technical limitations, this invention provides a dual-source heat pump heating system, comprising:

[0006] The heat pump unit has its evaporator end connected to the energy storage device in a loop, and its condenser end connected to the user end through a second circulation pipeline.

[0007] Auxiliary heat source, circulated and connected to energy storage equipment;

[0008] The energy storage circulation pipeline is connected in parallel to the second circulation pipeline, and the energy storage equipment is installed inside the energy storage circulation pipeline.

[0009] Optionally, the second circulation pipeline includes a second output pipe and a second return pipe, both of which are connected between the user end and the condenser end of the heat pump unit.

[0010] The energy storage circulation pipeline includes an energy storage input pipe and an energy storage return pipe. One end of the energy storage input pipe is connected to the second output pipe, and the other end is connected to the energy storage device. One end of the energy storage return pipe is connected to the second return pipe, and the other end is connected to the energy storage device.

[0011] Optionally, it also includes an energy storage heating pipe, with one end connected to the user end and the other end connected to the energy storage device.

[0012] Optionally, a second pump body is installed on the second output pipe, and the energy storage input pipe is connected to the second output pipe at the outlet end of the second pump body.

[0013] Optionally, it also includes an auxiliary branch, one end of which is connected to the second return pipe and the other end of which is connected to the second output pipe at the inlet end of the second pump body.

[0014] Optionally, the evaporator end of the heat pump unit and the energy storage device are circulatedly connected through a first circulation pipeline. The first circulation pipeline includes a first output pipe and a first return pipe, both of which are connected between the energy storage device and the evaporator end of the heat pump unit.

[0015] Optionally, a first pump body is installed on the first output pipe.

[0016] Optionally, the auxiliary heat source and the energy storage device are circulated together through an auxiliary heat circulation pipeline, which includes an auxiliary heat input pipe and an auxiliary heat return pipe, both of which are connected between the energy storage device and the auxiliary heat source.

[0017] Optionally, a third pump body is installed on the auxiliary heat input pipe.

[0018] Optionally, the energy storage device is an energy storage water tank.

[0019] The technical solution of this invention has the following advantages:

[0020] 1. The dual-source heat pump heating system provided by the present invention includes: a heat pump main unit, the evaporator end of which is circulatedly connected to an energy storage device, and the condenser end of which is connected to a user end through a second circulation pipeline; an auxiliary heat source, which is circulatedly connected to the energy storage device; an energy storage circulation pipeline, which is connected in parallel to the second circulation pipeline, and the energy storage device is installed in the energy storage circulation pipeline.

[0021] In the operation of a dual-source heat pump heating system, the heat pump unit can directly heat the user end through the second circulation pipeline, and can also heat the energy storage device through an energy storage circulation pipeline connected in parallel to the second circulation pipeline, storing energy in the energy storage device. The energy storage device is connected to the user's end through the energy storage circulation pipeline and the second circulation pipeline, allowing the energy storage device to also directly heat the user end. During peak energy consumption periods, both the heat pump and the energy storage device simultaneously heat the user end; during off-peak energy consumption periods, either the heat pump or the energy storage device alone heats the user end, with excess heat stored in the energy storage device via the heat pump. No additional energy storage device is needed; simply adding an energy storage circulation pipeline allows the dual-source heat pump heating system to operate within a high-efficiency range while adjusting its output mode according to the user's heating demand, storing excess heat in the energy storage device for use during peak energy consumption periods. It effectively solves the problem of insufficient output power of heat pump units during peak energy consumption periods and excessive output power during off-peak energy consumption periods, and can make full use of heat and reduce energy waste in dual-source heat pump heating systems.

[0022] 2. The dual-source heat pump heating system provided by this invention also includes an energy storage heating pipe, one end of which is connected to the user end and the other end of which is connected to the energy storage device. By setting up the energy storage heating pipe, the energy storage device is directly connected to the user end. When the energy storage device directly supplies heat to the user end, it can directly provide heat energy to the user end through the energy storage heating pipe, which can shorten the pipeline length between the energy storage device and the user end and reduce heat loss during pipeline transmission.

[0023] 3. The dual-source heat pump heating system provided by this invention further includes an auxiliary branch, one end of which is connected to the second return pipe, and the other end of which is connected to the second output pipe at the inlet end of the second pump body. By connecting the second return pipe and the second output pipe through the auxiliary branch, when the energy storage device supplies heat to the user end, it can supply heat to the user end solely through the energy storage device without going through the condenser end of the heat pump main unit, or it can supply heat to the user end through the energy storage device connected in series with the condenser end of the heat pump main unit. This allows the dual-source heat pump heating system to adjust to multiple operating modes according to the needs of the user end.

[0024] 4. The dual-source heat pump heating system provided by the present invention has a first pump body installed on the first output pipe. By setting the first pump body, the heat energy in the energy storage device can actively flow into the evaporator end of the heat pump host, thereby realizing the defrosting and antifreeze function of the heat pump host. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a dual-source heat pump heating system in the prior art.

[0027] Figure 2 This is a schematic diagram of a dual-source heat pump heating system provided in an embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of a dual-source heat pump heating system provided in another embodiment of the present invention.

[0029] Explanation of reference numerals in the attached diagram: 1. Heat pump main unit; 2. Energy storage tank; 3. Auxiliary heat source; 4. User end; 5. First valve; 6. Second valve; 7. Third valve; 8. Fourth valve; 9. Fifth valve; 10. Sixth valve; 11. Seventh valve; 12. Eighth valve; 13. Ninth valve; 14. Tenth valve; 15. Eleventh valve; 16. First pump body; 17. Second pump body; 18. Third pump body. Detailed Implementation

[0030] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Example

[0035] like Figure 2 The diagram illustrates a dual-source heat pump heating system provided in this embodiment, comprising: a heat pump main unit 1, an auxiliary heat source 3, and an energy storage device. In this embodiment, the energy storage device is an energy storage water tank 2, and the auxiliary heat source 3 is a heat source such as solar energy or power plant waste heat. The energy storage device can also be a reversible phase change thermal energy storage device or other device capable of large-capacity thermal energy storage.

[0036] The evaporator end of the heat pump unit 1 is circulatedly connected to the energy storage tank 2, and the condenser end of the heat pump unit 1 is connected to the user end 4 through the second circulation pipeline; the auxiliary heat source 3 is circulatedly connected to the energy storage tank 2; the energy storage circulation pipeline is connected in parallel to the second circulation pipeline, and the energy storage tank 2 is installed in the energy storage circulation pipeline.

[0037] The second circulation pipeline includes a second output pipe and a second return pipe, both of which are connected between the user end 4 and the condenser end of the heat pump main unit 1. The energy storage circulation pipeline includes an energy storage input pipe and an energy storage return pipe. One end of the energy storage input pipe is connected to the second output pipe, and the other end is connected to the energy storage tank 2. One end of the energy storage return pipe is connected to the second return pipe, and the other end is connected to the energy storage tank 2. An energy storage heating pipe is also directly connected between the user end 4 and the energy storage tank 2. In this embodiment, one end of the energy storage heating pipe is directly connected to the energy storage tank 2, and the other end is connected to the end of the second output pipe near the user end 4. A second pump body 17 is installed on the second output pipe, and the energy storage input pipe is connected to the second output pipe at the outlet end of the second pump body 17.

[0038] The evaporator end of the heat pump unit 1 is circulatedly connected to the energy storage tank 2 through a first circulation pipeline. The first circulation pipeline includes a first output pipe and a first return pipe, both of which are connected between the energy storage tank 2 and the evaporator end of the heat pump unit 1. A first pump body 16 is installed on the first output pipe.

[0039] The auxiliary heat source 3 and the energy storage tank 2 are connected via an auxiliary heat circulation pipeline. The auxiliary heat circulation pipeline includes an auxiliary heat input pipe and an auxiliary heat return pipe, both of which connect the energy storage tank 2 and the auxiliary heat source 3. A third pump 18 is installed on the auxiliary heat input pipe. The third pump 18 works to recover the heat energy from the auxiliary heat source 3 and return it to the energy storage tank 2 to heat the energy storage tank 2.

[0040] In this embodiment, a first valve 5 is installed on the energy storage input pipe. A second valve 6 is installed on the energy storage return pipe. A third valve 7 is installed on the second return pipe, which connects the third valve 7 to the heat pump main unit 1. A fourth valve 8 is installed on the second output pipe, which connects the energy storage input pipe to the second output pipe between the fourth valve 8 and the second pump body 17. A fifth valve 9 is installed on the energy storage heating pipe, which connects the fourth valve 8 to the second output pipe between the user end 4. A sixth valve 10 is installed on the first return pipe, and a seventh valve 11 is installed between the first pump body 16 and the energy storage device on the first output pipe. An eighth valve 12 is installed on the auxiliary heat return pipe, and a ninth valve 13 is installed between the third pump body 18 and the energy storage tank 2 on the auxiliary heat input pipe.

[0041] In the dual-source heat pump heating system provided in this embodiment, when the first valve 5, the second valve 6, and the fifth valve 9 are closed, and the third valve 7 and the fourth valve 8 are open, the main unit directly supplies heat to the user end 4. When the third valve 7, the fourth valve 8, and the fifth valve 9 are closed, and the first valve 5 and the second valve 6 are open, the heat pump main unit 1 heats the energy storage tank 2, storing excess heat in the energy storage tank 2 for use during off-peak hours. When the second valve 6 and the fourth valve 8 are closed, and the first valve 5, the third valve 7, and the fifth valve 9 are open, the energy storage tank 2 supplies heat to the user end 4. During peak energy consumption periods at the user end 4, the heat pump and the energy storage device simultaneously supply heat to the user end 4. During off-peak hours, either the heat pump or the energy storage device alone supplies heat to the user end 4, and excess heat is stored in the energy storage device via the heat pump. Without the need for additional energy storage devices or equipment costs, the dual-source heat pump heating system achieves high-efficiency operation within its operating range by simply adding an energy storage circulation pipeline. It adjusts its output mode according to the user's heating demand, storing excess heat in the energy storage device for use during peak energy consumption periods. This effectively solves the problems of insufficient output power during peak energy consumption periods and excessive output power during off-peak periods, ensuring full utilization of heat, reducing energy waste in the dual-source heat pump heating system, and utilizing peak and off-peak heat storage to achieve true energy saving and cost savings for users.

[0042] As an alternative implementation method, such as Figure 3As shown, to enable the heat pump heating system to switch to more different heating modes, an auxiliary branch is also included in the system. One end of the auxiliary branch is connected to the second return pipe between the third valve 7 and the user end 4, and the other end is connected to the second output pipe at the inlet end of the second pump body 17. A tenth valve 14 is installed on the auxiliary branch, and an eleventh valve 15 is installed on the second output pipe between the heat pump host 1 and the auxiliary branch. During the operation of the dual-source heat pump heating system provided in this embodiment, when the first valve 5, the second valve 6, the fifth valve 9, and the tenth valve 14 are closed, and the third valve 7, the fourth valve 8, and the eleventh valve 15 are open, the heat pump host 1 directly heats the user end 4. When the third valve 7, the fourth valve 8, the fifth valve 9, and the tenth valve 14 are closed, and the first valve 5, the second valve 6, and the eleventh valve 15 are open, the heat pump host 1 directly heats the energy storage tank 2. When the second valve 6, the third valve 7, the fourth valve 8, and the eleventh valve 15 are closed, and the first valve 5, the fifth valve 9, and the tenth valve 14 are open, the energy storage tank 2 directly supplies heat to the user end 4.

[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A dual-source heat pump heating system, characterized in that, include: The heat pump unit (1) has its evaporator end connected to the energy storage device in a loop, and its condenser end connected to the user end (4) through the second circulation pipeline; An auxiliary heat source (3) is circulatedly connected to the energy storage device; An energy storage circulation pipeline is connected in parallel to the second circulation pipeline, and the energy storage device is installed inside the energy storage circulation pipeline; The second circulation pipeline includes a second output pipe and a second return pipe, both of which are connected between the user end (4) and the condenser end of the heat pump host (1); The energy storage circulation pipeline includes an energy storage input pipe and an energy storage return pipe. One end of the energy storage input pipe is connected to the second output pipe, and the other end is connected to the energy storage device. One end of the energy storage return pipe is connected to the second return pipe, and the other end is connected to the energy storage device. A second pump body is installed on the second output pipe, and the energy storage input pipe is connected to the second output pipe at the outlet end of the second pump body. An auxiliary branch is connected at one end to the second return pipe and at the other end to the second output pipe at the inlet end of the second pump body; It also includes an energy storage heating pipe, one end of which is connected to the user end (4), and the other end is connected to the energy storage device, which is an energy storage water tank (2).

2. The dual-source heat pump heating system according to claim 1, characterized in that, The evaporator end of the heat pump host (1) is circulatedly connected to the energy storage device through a first circulation pipeline. The first circulation pipeline includes a first output pipe and a first return pipe. Both the first output pipe and the first return pipe are connected between the energy storage device and the evaporator end of the heat pump host (1).

3. The dual-source heat pump heating system according to claim 2, characterized in that, The first pump body is installed on the first output pipe.

4. The dual-source heat pump heating system according to any one of claims 1 to 3, characterized in that, The auxiliary heat source (3) and the energy storage device are circulated together through an auxiliary heat circulation pipeline. The auxiliary heat circulation pipeline includes an auxiliary heat input pipe and an auxiliary heat return pipe. Both the auxiliary heat input pipe and the auxiliary heat return pipe are connected between the energy storage device and the auxiliary heat source (3).

5. The dual-source heat pump heating system according to claim 4, characterized in that, A third pump body is installed on the auxiliary heat input pipe.

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