Ecological defrosting type air source heat pump system based on fused salt heating mechanism

Abstract

The utility model belongs to the technical field of heating and ventilation, and discloses an ecological defrosting type air source heat pump system based on a fused salt heating mechanism, which comprises a fused salt heating and defrosting tank, an air source heat pump, a heat storage water tank, a unit circulating water pump assembly and a tail end circulating water pump assembly, a water outlet of the fused salt heating defrosting tank is connected with the heat storage water tank and the unit circulating water pump assembly through a defrosting tank outlet pipeline. The other end of the unit circulating water pump assembly is connected with a water inlet of the air source heat pump; a water outlet of the air source heat pump is connected with a water inlet of the fused salt heating defrosting tank through a water supply pipeline, and the water outlet of the air source heat pump is connected with a water inlet of the heat storage water tank through a pipeline; a water supply port of the heat storage water tank is sequentially connected with a tail-end circulating water pump assembly and a tail-end water supply pipeline; and a water return port of the heat storage water tank is connected with a tail-end user through a tail-end water return pipeline. It is guaranteed that when the air source heat pump unit defrosts, the tail end keeps the constant outlet water temperature, and the stability of equipment is improved when the unit defrosts.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating and ventilation, and relates to an ecological defrosting air source heat pump system based on a molten salt heating mechanism. Background Art

[0002] The existing air source heat pump system CN211204210U is an energy-saving constant pressure stable domestic hot water air source heat pump system, which solves the problem that when the air source heat pump unit is heated at an outdoor ambient temperature below 0℃, the evaporator fin surface frost hinders the evaporator heat exchange performance. However, after specific implementation and application, it is found that it has the following problems: when the air source heat pump unit is defrosted, the system heating performance is greatly attenuated, thereby affecting the indoor temperature and comfort, and the unit is in a long-term frosting and consumes its own energy to defrost, which affects the service life of the equipment. Therefore, it is necessary to develop an air source heat pump system that solves the above technical problems. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies in the above-mentioned background technology. In order to ensure that the air source heat pump unit maintains a constant water outlet temperature at the end when defrosting, and to improve the stability of the equipment when the unit is defrosting, the utility model provides an ecological defrosting air source heat pump system based on a molten salt heating mechanism, so that the entire system can provide end users with a constant temperature and comfortable use experience during heating; and improve the stability of equipment operation.

[0004] The technical solution adopted by the utility model to solve its technical problems is: an ecological defrosting air source heat pump system based on a molten salt heating mechanism, comprising a molten salt heating defrost tank, an air source heat pump, a heat storage tank, a unit circulating water pump assembly, and a terminal circulating water pump assembly; the water outlet of the molten salt heating defrost tank is respectively connected to the heat storage tank and the unit circulating water pump assembly through a defrost tank outlet pipeline; the other end of the unit circulating water pump assembly is connected to the air source heat pump water inlet; the air source heat pump water outlet is connected to the molten salt heating defrost tank water inlet through a water supply pipeline, and the air source heat pump water outlet is connected to the heat storage tank water inlet through a pipeline; the heat storage tank water supply port is sequentially connected to the terminal circulating water pump assembly and the terminal water supply pipeline; the heat storage tank return port is connected to the terminal user through the terminal return water pipeline.

[0005] The terminal water supply pipeline is connected to the terminal user.

[0006] The end return water pipeline is also connected to a water supply pipeline, on which a butterfly valve is arranged. Softened tap water is connected to the end return water pipeline through the water supply pipeline to keep the water level in the hot water storage tank stable.

[0007] The unit circulating water pump assembly comprises two circulating water pump pipelines arranged in parallel, and a unit circulating water pump is arranged on each circulating water pump pipeline.

[0008] The terminal circulation water pump assembly comprises two terminal circulation water pump pipelines arranged in parallel, and a terminal circulation water pump is arranged on each terminal circulation water pump pipeline.

[0009] The water inlet of the terminal circulating water pump is connected to the water supply port of the heat storage tank through the water supply pipeline, and the water outlet of the terminal circulating water pump transports water to the end user through the terminal water supply pipeline. At the same time, the end user is connected to the return port of the heat storage tank through the terminal return water pipeline.

[0010] Furthermore, the end of the defrost tank outlet pipeline is connected to the hot water storage tank and the unit circulating water pump assembly through pipelines. The end of the defrost tank outlet pipeline is connected to pipeline A and pipeline B; pipeline A is used to connect the defrost tank outlet pipeline and the unit circulating water pump assembly; pipeline B is used to connect the defrost tank outlet pipeline and the hot water storage tank. A return water electric valve is set on pipeline B. The return water electric valve is connected to the water outlet of the hot water storage tank.

[0011] Furthermore, the water outlet of the molten salt heating defrost tank is connected to the inlet of the unit circulating water pump in the unit circulating water pump assembly through the defrost tank outlet pipeline.

[0012] Furthermore, a butterfly valve is arranged on the outlet pipeline of the defrost tank.

[0013] Furthermore, the unit circulating water pump outlet of the unit circulating water pump assembly is connected to the water inlet of the air source heat pump through a return water pipeline; and water is sent into the air source heat pump.

[0014] Furthermore, the end of the water supply pipeline is divided into pipeline A and pipeline B; pipeline A is used to connect the water supply pipeline and the water inlet of the molten salt heating defrost tank; pipeline B is used to connect the water supply pipeline and the water inlet of the hot water storage tank; and an electric valve is set on pipeline A, and a water supply electric valve is set on pipeline B.

[0015] A heat exchanger is arranged inside the molten salt heating defrosting tank. The heat exchanger is not limited to a specific model as long as its working function is achieved.

[0016] A salt storage bin is arranged in the molten salt heating and defrosting tank, and preferably a heat exchanger is arranged on the upper part of the salt storage bin.

[0017] A water tank temperature sensing head is arranged at the lower part of the molten salt heating and defrosting tank.

[0018] A sewage outlet is arranged at the bottom of the molten salt heating and defrosting tank.

[0019] The system is also equipped with a PLC control system. The air source heat pump, molten salt heating defrost tank, unit circulating water pump, hot water storage tank, terminal circulating water pump, electric valve, water supply electric valve, water return electric valve, heat exchanger, butterfly valve, and water tank temperature sensor are respectively connected to the PLC control system, and are not limited to a specific model to realize their working functions.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] 1. The ecological defrosting air source heat pump system based on the molten salt heating mechanism provided by the utility model reduces the impact of the unit defrosting on the water supply temperature of the terminal heating system, thereby ensuring the comfort of the user side.

[0022] 2. The ecological defrosting air source heat pump system based on the molten salt heating mechanism provided by the utility model avoids the influence of the heat exchange performance of the system due to incomplete defrosting of the unit, ensures the defrosting of the unit on demand, and effectively reduces the energy consumption of the unit during defrosting.

[0023] 3. The utility model adds a molten salt heating defrost tank. The newly added molten salt heating defrost tank is equipped with a salt storage bin which heats up quickly and has a high temperature, which can quickly solve the defrosting problem for the unit and greatly shorten the defrosting time of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0025] Figure 1 It is a schematic diagram of an ecological defrosting air source heat pump system based on a molten salt heating mechanism of the utility model.

[0026] Figure 2 It is a schematic diagram of the molten salt heating defrost tank.

[0027] In the figure, 1. air source heat pump, 2. molten salt heating defrost tank, 3. unit circulating water pump, 4. heat storage tank, 5. terminal circulating water pump, 6. terminal user, 7. electric valve, 8. water supply electric valve, 9. return water electric valve, 10. defrost tank outlet pipeline, 11. water supply pipeline, 12. return water pipeline, 13. water replenishment pipeline, 14. terminal water supply pipeline, 15. terminal return water pipeline, 16. water tank temperature sensor, 201. molten salt heating defrost tank water inlet, 202. exhaust port, 203. molten salt heating defrost tank water outlet, 204. heat exchanger, 205. salt storage warehouse, 206. sewage outlet. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

[0029] Example 1

[0030] An ecological defrosting air source heat pump system based on molten salt heating mechanism, such as Figure 1-2As shown, it includes a molten salt heating defrost tank 2, an air source heat pump 1, a hot water storage tank 4, a unit circulating water pump assembly, and a terminal circulating water pump assembly; the molten salt heating defrost tank water outlet 203 is connected to the hot water storage tank 4 and the unit circulating water pump assembly respectively through a defrost tank outlet pipeline 10; the other end of the unit circulating water pump assembly is connected to the water inlet of the air source heat pump 1; the water outlet of the air source heat pump 1 is connected to the water inlet 201 of the molten salt heating defrost tank through a water supply pipeline 11, and the water outlet of the air source heat pump 1 is connected to the water inlet of the hot water storage tank 4 through a pipeline; the water supply port of the hot water storage tank 4 is connected to the terminal circulating water pump assembly and the terminal water supply pipeline 14 in sequence; the return water port of the hot water storage tank 4 is connected to the end user 6 through the terminal return water pipeline 15.

[0031] The terminal water supply pipeline 14 is connected to the terminal user 6 .

[0032] The terminal return water pipeline 15 is also connected to a water supply pipeline 13, and a butterfly valve is arranged on the water supply pipeline 13. The softened tap water is connected to the terminal return water pipeline 15 through the water supply pipeline 13 to keep the water level in the hot water storage tank 4 stable.

[0033] The unit circulating water pump assembly comprises two circulating water pump pipelines arranged in parallel, and a unit circulating water pump 3 is arranged on each circulating water pump pipeline.

[0034] The terminal circulating water pump assembly comprises two terminal circulating water pump pipelines arranged in parallel, and a terminal circulating water pump 5 is arranged on each terminal circulating water pump pipeline.

[0035] The water inlet of the terminal circulating water pump 5 is connected to the water supply port of the hot water storage tank 4 through a water supply pipeline, and the water outlet of the terminal circulating water pump 5 transports water to the terminal user 6 through the terminal water supply pipeline 14. At the same time, the terminal user 6 is connected to the return water port of the hot water storage tank 4 through the terminal return water pipeline 15.

[0036] The end of the defrost tank outlet pipeline 10 is connected to the hot water storage tank 4 and the unit circulating water pump assembly through pipelines. The end of the defrost tank outlet pipeline 10 is connected to pipeline A and pipeline B; pipeline A is used to connect the defrost tank outlet pipeline 10 and the unit circulating water pump assembly; pipeline B is used to connect the defrost tank outlet pipeline 10 and the hot water storage tank 4. A return water electric valve 9 is set on pipeline B. The return water electric valve 9 is connected to the water outlet of the hot water storage tank 4.

[0037] The molten salt heating defrost tank water outlet 203 is connected to the inlet of the unit circulating water pump 3 in the unit circulating water pump assembly through the defrost tank outlet pipeline 10.

[0038] A butterfly valve is provided on the defrost tank outlet pipeline 10 .

[0039] The outlet of the unit circulating water pump 3 of the unit circulating water pump assembly is connected to the water inlet of the air source heat pump 1 through the return water pipeline 12; water is sent into the air source heat pump 1.

[0040] The end of the water supply pipeline 11 is divided into pipeline A and pipeline B; pipeline A is used to connect the water supply pipeline 11 and the water inlet 201 of the molten salt heating defrost tank; pipeline B is used to connect the water supply pipeline 11 and the water inlet of the hot water storage tank 4; and an electric valve 7 is set on pipeline A, and a water supply electric valve 8 is set on pipeline B.

[0041] The molten salt heating and defrosting tank 2 is provided with a heat exchanger 204 inside. The heat exchanger 204 is not limited to a specific model as long as its working function is achieved.

[0042] A salt storage bin 205 is arranged in the molten salt heating defrosting tank 2 , and preferably the heat exchanger 204 is arranged on the upper part of the salt storage bin 205 .

[0043] A water tank temperature sensing head 16 is arranged at the lower part of the molten salt heating and defrosting tank 2 .

[0044] A sewage outlet 206 is arranged at the bottom of the molten salt heating and defrosting tank 2 .

[0045] The system is also equipped with a PLC control system. The air source heat pump 1, molten salt heating defrost tank 2, unit circulating water pump 3, hot water storage tank 4, terminal circulating water pump 5, electric valve 7, water supply electric valve 8, return water electric valve 9, heat exchanger 204, butterfly valve, and water tank temperature sensor 16 are respectively connected to the PLC control system, and are not limited to a specific model to realize their working functions.

[0046] When the air source heat pump 1 is defrosting, the electric valve 7 is opened, the water supply electric valve 8 is closed, and the return water electric valve 9 is closed. The unit circulating water pump 3 of the unit circulating water pump assembly draws the high-temperature water in the molten salt heating defrost tank 2 into the air source heat pump 1 through the return water pipeline 12, so as to quickly defrost the unit. The defrosted low-temperature water enters the molten salt heating defrost tank 2 through the water supply pipeline 11, and is exchanged with the salt storage tank 205 through the heat exchanger 204 to become high-temperature water. The high-temperature water circulates back and forth again until the unit is defrosted.

[0047] After the air source heat pump 1 finishes defrosting, the electric valve 7 is closed, the water supply electric valve 8 and the return water electric valve 9 are opened, and the water tank temperature sensor 16 in the hot water storage tank 4 is linked with the air source heat pump 1 and the unit circulating water pump 3. When the water tank temperature sensor 16 feedbacks that the water temperature in the hot water storage tank 4 is lower than the set temperature, the unit circulating pump 3 will. The water in the hot water storage tank 4 enters the air source heat pump 1 through the return water pipeline 12 for heat exchange, and the high-temperature water after heat exchange enters the hot water storage tank 4 through the water supply pipeline 11, and this cycle is repeated until the water temperature in the hot water storage tank 4 reaches the set temperature.

[0048] The terminal circulating water pump 5 provides a heat source for the terminal user 6 side by using the high-temperature water in the hot water storage tank 4 through the terminal water supply pipeline 14. The air source heat pump system of the utility model can avoid affecting the water temperature on the terminal user 6 side.

[0049] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. An ecological defrosting air source heat pump system based on molten salt heating mechanism, characterized in that: The invention comprises a molten salt heating defrost tank (2), an air source heat pump (1), a heat storage tank (4), a unit circulating water pump assembly, and a terminal circulating water pump assembly; the water outlet (203) of the molten salt heating defrost tank is respectively connected to the heat storage tank (4) and the unit circulating water pump assembly through a defrost tank outlet pipeline (10); the other end of the unit circulating water pump assembly is connected to the water inlet of the air source heat pump (1); the water outlet of the air source heat pump (1) is connected to the water inlet (201) of the molten salt heating defrost tank through a water supply pipeline (11), and the water outlet of the air source heat pump (1) is connected to the water inlet of the heat storage tank (4) through a pipeline; the water supply port of the heat storage tank (4) is connected to the terminal circulating water pump assembly and the terminal water supply pipeline (14) in sequence; the water return port of the heat storage tank (4) is connected to the terminal user (6) through the terminal return water pipeline (15).

2. The ecological defrosting air source heat pump system based on the molten salt heating mechanism as claimed in claim 1 is characterized in that: The terminal water supply pipeline (14) is connected to the terminal user (6).

3. The ecological defrosting air source heat pump system based on molten salt heating mechanism as claimed in claim 1 is characterized in that: The terminal return water pipeline (15) is also connected to a water supply pipeline (13), and a butterfly valve is arranged on the water supply pipeline (13).

4. The ecological defrosting air source heat pump system based on molten salt heating mechanism as claimed in claim 1 is characterized in that: The end of the defrost tank outlet pipeline (10) is connected to a pipeline A and a pipeline B; the pipeline A is used to connect the defrost tank outlet pipeline (10) and the unit circulating water pump assembly; the pipeline B is used to connect the defrost tank outlet pipeline (10) and the hot water storage tank (4).

5. The ecological defrosting air source heat pump system based on molten salt heating mechanism as claimed in claim 1 is characterized in that: The end of the water supply pipeline (11) is divided into pipeline A and pipeline B; pipeline A is used to connect the water supply pipeline (11) and the water inlet (201) of the molten salt heating defrosting tank; pipeline B is used to connect the water supply pipeline (11) and the water inlet of the hot water storage tank (4); and an electric valve (7) is provided on pipeline A, and a water supply electric valve (8) is provided on pipeline B.

6. The ecological defrosting air source heat pump system based on molten salt heating mechanism as claimed in claim 1 is characterized in that: A heat exchanger (204) is arranged inside the molten salt heating and defrosting tank (2).

7. The ecological defrosting air source heat pump system based on molten salt heating mechanism as claimed in claim 1 is characterized in that: A salt storage bin (205) is arranged in the molten salt heating and defrosting tank (2).

8. The ecological defrosting air source heat pump system based on molten salt heating mechanism as claimed in claim 1 is characterized in that: A water tank temperature sensing head (16) is arranged at the lower part of the molten salt heating and defrosting tank (2).

9. The ecological defrosting air source heat pump system based on molten salt heating mechanism as claimed in claim 1, characterized in that: A sewage outlet (206) is provided at the bottom of the molten salt heating and defrosting tank (2).

10. The ecological defrosting air source heat pump system based on molten salt heating mechanism as claimed in claim 4, characterized in that: A water return electric valve (9) is provided on pipeline B.

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