An air source heat pump heating system

Abstract

The utility model relates to a heat supply system technical field especially relates to a kind of air source heat pump heat supply system.The technical scheme comprising first air source heat pump, second air source heat pump, third air source heat pump, fourth air source heat pump, self-cleaning heat storage water tank, circulating water pump, first valve, second valve, third valve, fourth valve, return water line, water supply line and heat user;One end of return water line is connected with heat user, and the other end is connected with self-cleaning heat storage water tank by circulating water pump, and the water inlet end between first air source heat pump, second air source heat pump, third air source heat pump, fourth air source heat pump is connected by first pipeline connection.The utility model realizes the switching of series-parallel connection mode between heat pump unit, and then expands heat pump cluster supply return water temperature difference adjustment range, effectively improves system operation flexibility, guarantees that system can be efficient under different operation modes, satisfies the heat supply demand under different working conditions.

Description

Technical Field

[0001] This utility model relates to the field of heating system technology, and in particular to an air source heat pump heating system. Background Technology

[0002] With the advancement of dual-carbon goals, reducing the proportion of fossil fuels in the heat source of centralized heating is an inevitable choice for achieving decarbonization in the heating industry. Replacing fossil fuels with efficient electrified equipment is an effective way to reduce the proportion of fossil fuels. Air source heat pumps can extract heat from the environment using a small amount of electricity and convert it into usable heat energy. They are important equipment for the full electrification of centralized heating. The energy efficiency and heating capacity of existing air source heat pumps are greatly affected by ambient temperature. Centralized heating using air source heat pumps generally adopts a cluster arrangement of multiple units in parallel. When the user's heat load fluctuates or the ambient temperature changes, the system is difficult to adapt to the changes in operating conditions by flexibly adjusting the water temperature difference, resulting in insufficient system operational flexibility. Furthermore, if the number of operating units in the parallel cluster system is reduced, the heating stability may decrease. If more units are maintained in operation, it is easy to waste energy and fail to achieve precise on-demand heating. Under the condition of high user heat load or low ambient temperature, the system is limited by the fixed range of inlet and outlet water temperature difference, making it difficult to increase the heat supply per unit time. This may fail to meet the peak heating demand of users and reduce the heating reliability and energy utilization efficiency of the air source heat pump centralized heating system. Therefore, this utility model proposes an air source heat pump heating system. Utility Model Content

[0003] The purpose of this invention is to address the problems in the background technology of centralized heating using air source heat pumps, which generally employs multiple units arranged in parallel clusters. When user heat load fluctuates or ambient temperature changes, the system struggles to adapt to changes in operating conditions by flexibly adjusting the water temperature difference, resulting in insufficient system operational flexibility. Furthermore, reducing the number of operating units in a parallel cluster system may lead to a decrease in heating stability, while maintaining a large number of units in operation can easily result in energy waste and an inability to achieve precise on-demand heating. Under conditions of high user heat load or low ambient temperature, the system is limited by the fixed range of inlet and outlet water temperature differences, making it difficult to increase the heat output per unit time and potentially failing to meet users' peak heating demands, thus reducing the heating reliability and energy efficiency of the centralized heating system. Therefore, this invention proposes an air source heat pump heating system.

[0004] The technical solution of this utility model is as follows: An air source heat pump heating system includes a first air source heat pump, a second air source heat pump, a third air source heat pump, a fourth air source heat pump, a self-cleaning hot water storage tank, a circulating water pump, a first valve, a second valve, a third valve, a fourth valve, a return water pipeline, a supply water pipeline, and heat users; one end of the return water pipeline is connected to the heat user, and the other end is connected to the self-cleaning hot water storage tank through the circulating water pump; the inlet ends of the first air source heat pump, the second air source heat pump, the third air source heat pump, and the fourth air source heat pump are connected to the heat user. The first, second, third, and fourth air source heat pumps are connected by a first pipeline, which is equipped with a second and a fourth valve, and one end of the first pipeline is connected to a self-cleaning hot water storage tank. The outlets of the first, second, third, and fourth air source heat pumps are connected by a second pipeline, which is equipped with a first valve, and one end of the second pipeline is connected to a water supply pipeline, one end of which is connected to a heat user. A third pipeline is provided between the first and second pipelines, and a third valve is provided on the third pipeline.

[0005] Optionally, the self-cleaning hot water storage tank includes a tank body, a cylinder is fixedly installed on the upper surface of the tank body, the output end of the cylinder passes through the tank body and extends to be connected to a connecting frame, a sealing plate is fixedly connected to the lower end of the connecting frame, a motor is fixedly installed on the upper surface of the sealing plate, the output end of the motor passes through the sealing plate and extends to be connected to a cleaning disc, and a side scraper is fixedly provided on the outer wall of the cleaning disc.

[0006] Optionally, a sealing ring is fixedly fitted onto the outer wall of the sealing plate.

[0007] Optionally, a bottom scraper is fixedly provided on the bottom surface of the cleaning disc.

[0008] Optionally, both the return water pipeline and the supply water pipeline are equipped with temperature monitoring components for monitoring the working fluid temperature.

[0009] Optionally, the circulating water pump is an adjustable flow rate pump.

[0010] Optionally, the outer wall of the housing is connected to an inlet pipe and an outlet pipe.

[0011] Optionally, a drain pipe is connected to the bottom of the box, and a fifth valve is installed on the drain pipe.

[0012] In summary, this application includes at least one of the following beneficial technical effects: This utility model utilizes a structure in which the inlet ends of a first air source heat pump, a second air source heat pump, a third air source heat pump, and a fourth air source heat pump are connected via a first pipeline, and the outlet ends are connected via a second pipeline. The first pipeline is equipped with a second valve and a fourth valve, the second pipeline is equipped with a first valve, and the first and second pipelines are connected via a third pipeline equipped with a third valve. This structure enables the switching of series and parallel connection modes between heat pump units, thereby expanding the temperature difference adjustment range of the supply and return water of the heat pump cluster, effectively improving the system's operational flexibility, ensuring that the system can operate efficiently under different operating modes, and meeting the heating needs under different working conditions. Furthermore, this utility model, through the combination structure of the outer wall scraper and the bottom scraper of the cleaning disc, combined with the high-speed rotation of the cleaning disc driven by the motor, can effectively remove scale, impurities and dirt deposited on the inner wall of the tank and the bottom, preventing dirt from affecting the heat conduction efficiency of the water tank, ensuring the water tank's heat preservation performance for storing hot water, and preventing dirt from clogging the pipes, thus ensuring the smooth connection of the heating system. Attached Figure Description

[0013] Figure 1 A schematic diagram of an air source heat pump heating system is provided. Figure 2 for Figure 1 Schematic diagram of the structure of a self-cleaning hot water storage tank; Figure 3 for Figure 2 Cross-sectional structural diagram of a self-cleaning hot water storage tank; Figure 4 for Figure 2 A partial disassembled structural diagram of a self-cleaning hot water storage tank.

[0014] Figure label: 1. First air source heat pump; 2. Second air source heat pump; 3. Third air source heat pump; 4. Fourth air source heat pump; 5. Self-cleaning hot water storage tank; 51. Tank body; 52. Cylinder; 53. Connecting frame; 54. Sealing plate; 55. Motor; 56. Cleaning disc; 57. Side scraper; 6. Circulating water pump; 7. First valve; 8. Second valve; 9. Third valve; 10. Fourth valve; 11. Return water pipeline; 12. Supply water pipeline; 13. Heat user; 14. First pipeline; 15. Second pipeline; 16. Third pipeline; 17. Sealing ring; 18. Bottom scraper; 19. Inlet pipe; 20. Outlet pipe; 21. Sewage pipe; 22. Fifth valve. Detailed Implementation

[0015] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0016] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0017] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0020] Example like Figure 1 As shown, the present invention proposes an air source heat pump heating system, including a first air source heat pump 1, a second air source heat pump 2, a third air source heat pump 3, and a fourth air source heat pump 4, and the air source heat pumps include, but are not limited to, four; a self-cleaning hot water storage tank 5; a circulating water pump 6; a first valve 7; a second valve 8; a third valve 9; a fourth valve 10; a return water pipe 11; a supply water pipe 12; and a heat user 13. Both the return water pipe 11 and the supply water pipe 12 are equipped with temperature monitoring components for monitoring the working fluid temperature.

[0021] Furthermore, one end of the return water pipe 11 is connected to the heat user 13, and the other end is connected to the self-cleaning hot water storage tank 5 via the circulating water pump 6. The circulating water pump 6 is an adjustable flow pump used to control the water flow. The inlet ends of the first air source heat pump 1, the second air source heat pump 2, the third air source heat pump 3, and the fourth air source heat pump 4 are connected via the first pipe 14. The first pipe 14 is equipped with a second valve 8 and a fourth valve 10, which can control the opening and closing of the first pipe 14. One end of the first pipe 14 is connected to the self-cleaning hot water storage tank 5.

[0022] The outlets of the first air source heat pump 1, the second air source heat pump 2, the third air source heat pump 3, and the fourth air source heat pump 4 are connected by a second pipeline 15. A first valve 7 is installed on the second pipeline 15, which can control the opening and closing of the second pipeline 15. One end of the second pipeline 15 is connected to the water supply pipeline 12, and one end of the water supply pipeline 12 is connected to the heat user 13. A third pipeline 16 is installed between the first pipeline 14 and the second pipeline 15, which can connect the first pipeline 14 and the second pipeline 15. A third valve 9 is installed on the third pipeline 16 to control the opening and closing of the third pipeline 16.

[0023] As one implementation method, such as Figures 1 to 4 As shown, the self-cleaning hot water storage tank 5 includes a tank body 51. An air valve is installed on the upper surface of the tank body 51. An inlet pipe 19 and an outlet pipe 20 are connected to the outer wall of the tank body 51. Control valves are installed on the inlet pipe 19 and the outlet pipe 20 respectively. One end of the inlet pipe 19 is connected to the return water pipe 11, and one end of the outlet pipe 20 is connected to the second pipe 15. A drain pipe 21 is connected to the bottom of the tank body 51, and a fifth valve 22 is installed on the drain pipe 21. The drain pipe 21 facilitates the discharge of cleaned impurities from the inside of the tank body 51. A cylinder 52 is fixedly installed on the upper surface of the tank body 51, and the cylinder 52 is equipped with an air source device to provide power to the cylinder 52 (this is existing technology and will not be described in detail here). The output end of the cylinder 52 passes through the tank body 51 and extends to connect to a connecting frame 53. A sealing plate 54 is fixedly connected to the lower end of the connecting frame 53, and a sealing sleeve is fixedly fitted onto the outer wall of the sealing plate 54. The sealing ring 17 can increase the sealing performance between the sealing plate 54 and the housing 51. A motor 55 is fixedly installed on the upper surface of the sealing plate 54. The output end of the motor 55 passes through the sealing plate 54 and extends to connect to the cleaning disc 56. The output end of the motor 55 can drive the cleaning disc 56 to rotate. A bottom scraper 18 is fixedly installed on the bottom surface of the cleaning disc 56, and a side scraper 57 is fixedly installed on the outer wall of the cleaning disc 56. During the rotation of the cleaning disc 56, the bottom scraper 18 and the side scraper 57 can be driven to rotate, thereby cleaning the impurities on the inner wall and bottom surface of the housing 51.

[0024] The working principle of this embodiment is as follows: the circulating water pump 6 is turned on and its flow rate is adjusted according to actual needs. If parallel operation is required, the third valve 9 is directly closed, and the first valve 7, the second valve 8, and the fourth valve 10 are opened and adjusted at the same time. This allows the water returning from the heat user 13 to the return water pipeline 11 to enter the parallel first air source heat pump 1, the second air source heat pump 2, the third air source heat pump 3, and the fourth air source heat pump 4 through the second valve 8 and the fourth valve 10. After the water is heated by the first air source heat pump 1, the second air source heat pump 2, the third air source heat pump 3, and the fourth air source heat pump 4, it is collected through the second pipeline 15 and then enters the water supply pipeline 12 through the first valve 7 to supply the heat user 13.

[0025] During this process, the working fluid temperature is monitored by the temperature monitoring component on the return water pipe 11. When the monitored temperature is lower than the required temperature, the output of the first air source heat pump 1, the second air source heat pump 2, the third air source heat pump 3, and the fourth air source heat pump 4 are increased.

[0026] When the monitored temperature is higher than the required temperature, the output of the first air source heat pump 1, the second air source heat pump 2, the third air source heat pump 3, and the fourth air source heat pump 4 is reduced. At the same time, the water temperature is monitored by the temperature monitoring component on the water supply pipeline 12 to help determine the heating effect.

[0027] If it is necessary to switch to series operation mode, first adjust the flow rate of circulating water pump 6 to the appropriate state, then close the first valve 7 and the fourth valve 10, open and adjust the second valve 8 and the third valve 9, so that the water in the return water pipeline 11 first enters the third air source heat pump 3 and the fourth air source heat pump 4 through the second valve 8. The water is heated by the third air source heat pump 3 and the fourth air source heat pump 4, and then enters the first air source heat pump 1 and the second air source heat pump 2 through the third pipeline 16 and the third valve 9. The water is further heated to the required supply water temperature by the first air source heat pump 1 and the second air source heat pump 2, and then the warm water is supplied to the heat user 13 through the supply water pipeline 12.

[0028] During this process, the water temperature is monitored by temperature monitoring components in the return water pipe 11 and the supply water pipe 12. When the water temperature detected in the return water pipe 11 is lower than the set target return water temperature, the output of the third air source heat pump 3 and the fourth air source heat pump 4 is increased. When the water temperature detected in the return water pipe 11 is higher than the set target return water temperature, the output of the third air source heat pump 3 and the fourth air source heat pump 4 is decreased.

[0029] When the water temperature detected in the water supply pipeline 12 is lower than the set target water supply temperature, the output of the first air source heat pump 1 and the second air source heat pump 2 is increased. When the water temperature detected in the water supply pipeline 12 is higher than the set target water supply temperature, the output of the first air source heat pump 1 and the second air source heat pump 2 is decreased. This enables the switching of the series-parallel connection mode between heat pump units, thereby expanding the temperature difference adjustment range of the heat pump cluster's supply and return water, effectively improving the system's operational flexibility, ensuring that the system can operate efficiently in different modes, and meeting the heating needs under different working conditions. When impurities are generated inside the self-cleaning hot water storage tank 5 and need to be cleaned, the cylinder 52 on the upper surface of the tank 51 is activated, the inlet pipe 19 and the outlet pipe 20 are closed at the same time, and the fifth valve 22 on the drain pipe 21 is opened to discharge the warm water stored inside the tank 51 through the drain pipe 21.

[0030] Subsequently, the output end of cylinder 52 is activated to push the structure on connecting frame 53 and sealing plate 54 downwards, causing the sealing ring 17 on the outer wall of sealing plate 54 to adhere to the inner wall of tank 51 to form a seal. During the process of cylinder 52 pushing sealing plate 54, the warm water inside tank 51 is completely discharged. During the process of cylinder 52 pushing sealing plate 54, motor 55 on sealing plate 54 is activated, and motor 55 drives cleaning disc 56 to rotate. Side scraper 57 on the outer wall of cleaning disc 56 scrapes away impurities from the inner wall of tank 51, and bottom scraper 18 on the bottom scrapes away impurities from the bottom of tank 51. During the cleaning process, the fallen impurities are discharged through drain pipe 21. After cleaning is completed, motor 55 is turned off, and cylinder 52 is controlled to drive sealing plate 54 and cleaning disc 56 to reset. This prevents dirt from adhering and affecting the heat conduction efficiency of the water tank, ensures the water tank's heat preservation performance for hot water storage, and prevents dirt from clogging the pipes, ensuring the smooth operation of the heating system.

[0031] The above specific embodiments are merely optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An air source heat pump heating system, characterized in that, include: First air source heat pump (1), second air source heat pump (2), third air source heat pump (3), fourth air source heat pump (4), self-cleaning hot water storage tank (5), circulating water pump (6), first valve (7), second valve (8), third valve (9), fourth valve (10), return water pipeline (11), water supply pipeline (12) and heat user (13); One end of the return water pipe (11) is connected to the heat user (13), and the other end is connected to the self-cleaning hot water storage tank (5) through the circulating water pump (6). The inlet ends of the first air source heat pump (1), the second air source heat pump (2), the third air source heat pump (3), and the fourth air source heat pump (4) are connected through the first pipe (14). The first pipe (14) is equipped with a second valve (8) and a fourth valve (10), and one end of the first pipe (14) is connected to the self-cleaning hot water storage tank (5). The outlets of the first air source heat pump (1), the second air source heat pump (2), the third air source heat pump (3), and the fourth air source heat pump (4) are connected by a second pipeline (15). A first valve (7) is provided on the second pipeline (15), and one end of the second pipeline (15) is connected to the water supply pipeline (12). One end of the water supply pipeline (12) is connected to the heat user (13). A third pipeline (16) is provided between the first pipeline (14) and the second pipeline (15), and a third valve (9) is provided on the third pipeline (16).

2. The air source heat pump heating system according to claim 1, characterized in that, The self-cleaning hot water storage tank (5) includes a tank body (51). A cylinder (52) is fixedly installed on the upper surface of the tank body (51). The output end of the cylinder (52) passes through the tank body (51) and extends to be connected to a connecting frame (53). A sealing plate (54) is fixedly connected to the lower end of the connecting frame (53). A motor (55) is fixedly installed on the upper surface of the sealing plate (54). The output end of the motor (55) passes through the sealing plate (54) and extends to be connected to a cleaning disc (56). A side scraper (57) is fixedly provided on the outer wall of the cleaning disc (56).

3. The air source heat pump heating system according to claim 2, characterized in that, A sealing ring (17) is fixedly fitted onto the outer wall of the sealing plate (54).

4. The air source heat pump heating system according to claim 2, characterized in that, The bottom surface of the cleaning disc (56) is fixedly provided with a bottom scraper (18).

5. An air source heat pump heating system according to claim 1, characterized in that, Both the return water pipeline (11) and the supply water pipeline (12) are equipped with temperature monitoring components for monitoring the working fluid temperature.

6. The air source heat pump heating system according to claim 1, characterized in that, The circulating water pump (6) is an adjustable flow rate pump.

7. An air source heat pump heating system according to claim 2, characterized in that, The outer wall of the box (51) is connected to an inlet pipe (19) and an outlet pipe (20).

8. An air source heat pump heating system according to claim 2, characterized in that, The bottom of the box (51) is connected to a drain pipe (21), and a fifth valve (22) is provided on the drain pipe (21).

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