Double-circulation air source heat pump system

Abstract

The utility model discloses a double-circulation air source heat pump system. Comprising a heat exchanger, a first medium circulation pipeline and a second medium circulation pipeline which are connected with the heat exchanger, a six-way valve and two air source heat exchange units, and the second medium circulation pipeline and the two air source heat exchange units are connected with the six-way valve. The six-way valve is internally provided with an adjusting assembly used for enabling the second medium circulation pipeline to communicate with at least one air source heat exchange unit. The second medium circulation pipeline is connected with the two air source heat exchange units through the six-way valve, can be communicated with at least one air source heat exchange unit through the adjusting assembly and is used for exchanging heat with the first medium circulation pipeline, and refrigeration or heating is achieved. In the heat supply process, defrosting can be conducted in turn through the adjusting assembly and the two air source heat exchange units, the stable heat supply effect is kept, temperature fluctuation caused by defrosting is reduced, and a proper water temperature environment is provided for circulating water culture.

Description

Technical Field

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

[0002] In northern regions, the cold winter climate and low water temperatures make recirculating aquaculture systems (RAS) difficult to implement. Traditional heating methods suffer from high energy consumption, pollution, and high costs. While air source heat pumps offer certain advantages, existing models exhibit problems in the low temperatures of northern climates, including low heating efficiency, easy frosting, and large temperature fluctuations. When the evaporator heat exchange plates frost up, a defrosting process begins, stopping heating of the aquaculture water and causing temperature fluctuations that fail to meet the needs of RAS. Therefore, a dual-cycle air source heat pump is urgently needed to solve these problems. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a dual-circulation air source heat pump system, including a heat exchanger and a first medium circulation pipeline and a second medium circulation pipeline connected to the heat exchanger. It also includes a six-way valve and two air source heat exchange units. The second medium circulation pipeline and the two air source heat exchange units are respectively connected to the six-way valve. The six-way valve contains an adjustment component for connecting the second medium circulation pipeline to at least one of the air source heat exchange units.

[0004] Furthermore, the regulating assembly includes two four-way diverting valves and a connecting pipe. The two four-way diverting valves are connected through the connecting pipe. The second medium outlet pipe of the second medium circulation pipeline is connected to one of the four-way diverting valves, and the second medium inlet pipe of the second medium circulation pipeline is connected to the other four-way diverting valve. The two air source heat exchange units are connected to the two four-way diverting valves in a one-to-one correspondence. Each four-way diverting valve is connected to a driving component, thereby having a working position that connects the corresponding air source heat exchange unit to the second medium circulation pipeline and a standby position that disconnects the corresponding air source heat exchange unit from the second medium circulation pipeline.

[0005] Furthermore, each of the four-way diverting valves includes two built-in pipelines and four diverting ports. The diverting ports are arranged in pairs and are respectively connected to one of the built-in pipelines. When in the standby position, the medium inlet and outlet pipes of the air source heat exchange unit are connected to one of the built-in pipelines.

[0006] Furthermore, the second medium outlet pipe is provided with a liquid storage tank, a filter and a flow throttle in sequence along the medium flow direction.

[0007] Furthermore, a check valve is provided on the second medium outlet pipe, and / or a check valve is provided on the second medium inlet pipe.

[0008] Furthermore, each of the air source heat exchange units includes an evaporator and a compressor, the compressor being connected to the evaporator, and the medium inlet end of the evaporator and the medium outlet end of the compressor being connected to a six-way valve respectively.

[0009] Furthermore, the air source heat exchange unit also includes a gas-liquid separator, which is disposed in the pipeline flow path of the evaporator and the compressor.

[0010] Furthermore, a heat exchange fan is provided on one side of the evaporator.

[0011] Furthermore, the first medium circulation pipeline includes a return water pipeline and an outlet water pipeline, which are respectively connected to the heat exchanger, and a circulation pump is provided on the return water pipeline.

[0012] Furthermore, a temperature sensor is installed on the water outlet pipe.

[0013] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0014] 1) The dual-circulation air source heat pump system provided by this utility model has a second medium circulation pipeline connected to two air source heat exchange units through a six-way valve. It can be connected to at least one air source heat exchange unit through an adjustment component for heat exchange with the first medium circulation pipeline to achieve cooling or heating. During the heating process, it can provide stable heating. Through the adjustment component, the two air source heat exchange units can defrost in turn to maintain a stable heating effect, reduce temperature fluctuations caused by defrosting, and provide a suitable water temperature environment for recirculating aquaculture.

[0015] 2) The dual-circulation air source heat pump system provided by this utility model has two operating modes, namely strong and weak, through the series connection or individual operation of two air source heat exchange units, which improves heat exchange efficiency, reduces energy consumption, and saves breeding costs.

[0016] 3) The dual-circulation air source heat pump system provided by this utility model, by setting two air source heat exchange units, is easy to maintain and has good reliability and stability while ensuring stable heating or cooling. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1A schematic diagram of the dual-cycle air source heat pump system provided by this utility model;

[0019] Figure 2 A schematic diagram of the regulating component in the dual-cycle air source heat pump system provided by this utility model.

[0020] 1-Heat exchanger; 2-First medium circulation pipeline; 21-Return water pipeline; 22-Outlet water pipeline; 23-Circulation pump; 24-Temperature sensor; 3-Second medium circulation pipeline; 31-Second medium outlet pipe; 32-Second medium inlet pipe; 33-Liquid storage tank; 34-Filter; 35-Throttle; 36-One-way valve; 4-Six-way valve; 41-First port; 42-Second port; 43-Third port; 44-Fourth port; 45-Fifth port; 46-Sixth port; 47-Four-way diverting valve; 48-Connecting pipe; 5-Air source heat exchange unit; 51-Evaporator; 52-Gas-liquid separator; 53-Compressor; 54-Heat exchange fan. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. In the accompanying drawings, the dimensions and relative dimensions of certain parts may be enlarged for clarity.

[0022] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "connected" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0023] In the description of this utility model, the terms "upper", "lower", "left", "right", "front", "back", "center", "horizontal", "vertical", "top", "bottom", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and simplification of operation, 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 this utility model.

[0024] Furthermore, in the description of this utility model, the terms "first" and "second" are used merely for descriptive distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Additionally, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0025] As per the instruction manual Figure 1 As shown, this utility model provides a dual-circulation air source heat pump system, including a heat exchanger 1 and a first medium circulation pipeline 2 and a second medium circulation pipeline 3 connected to the heat exchanger 1. It also includes a six-way valve 4 and two air source heat exchange units 5. The second medium circulation pipeline 3 and the two air source heat exchange units 5 are respectively connected to the six-way valve 4. The six-way valve 4 is provided with an adjustment component for connecting the second medium circulation pipeline 3 with at least one of the air source heat exchange units 5.

[0026] Specifically, the first medium circulation pipeline 2 is connected to the first medium inlet and outlet of the heat exchanger 1, and the second medium circulation pipeline 3 is connected to the second medium inlet and outlet of the heat exchanger 1. The first medium and the second medium exchange heat within the heat exchanger 1 to achieve the cooling or heating mode of the air source heat pump. The medium can be liquid or non-liquid. In this embodiment, the air source heat pump system is used for recirculating aquaculture. The first medium circulation pipeline 2 includes a return water pipeline 21 and an outlet water pipeline 22. The return water pipeline 21 is used to transport the aquaculture water to the heat exchanger 1 for heat exchange. The water after heat exchange is sent to the pond through the outlet water pipeline 22 to provide a suitable water temperature environment for aquaculture. Specifically, in cold winter weather, when heating is needed for the aquaculture water, the medium in the second medium circulation pipe 3 is heated by the air source heat exchange unit 5 and then enters the heat exchanger 1. The aquaculture water exchanges heat with the second medium in the heat exchanger 1 through the return water pipe 21, thus heating the aquaculture water. The heated aquaculture water then returns to the pond through the outlet pipe 22. The second medium in the second medium circulation pipe 3 cools down and then continues to be heated in the air source heat exchange unit 5, continuously supplying heat to the aquaculture water. In hot summer weather, when cooling is needed for the aquaculture water, the medium in the second medium circulation pipe 3 cools down by the air source heat exchange unit 5 and then enters the heat exchanger 1. The aquaculture water exchanges heat with the second medium in the heat exchanger 1 through the return water pipe 21, thus cooling the aquaculture water. The cooled aquaculture water then returns to the pond through the outlet pipe 22. The second medium in the second medium circulation pipe 3 heats up and then continues to be cooled in the air source heat exchange unit 5, continuously supplying cooling to the aquaculture water to maintain its temperature.

[0027] Preferably, the second medium is a refrigerant.

[0028] As per the instruction manual Figure 1As shown, the two air source heat exchange units 5 are respectively denoted as air source heat exchange unit A and air source heat exchange unit B. A and B are two independent circulation pipelines. The six-way valve 4 has a first port 41, a second port 42, a third port 43, a fourth port 44, a fifth port 45, and a sixth port 46. The second medium circulation pipeline 3 includes a second medium outlet pipe 31 and a second medium inlet pipe 32. The second medium outlet pipe 31 and the second medium inlet pipe 32 are respectively connected to the second medium inlet and outlet of the heat exchanger 1. The second medium outlet pipe 31 is connected to the first port 41, and the second medium inlet pipe 32 is connected to the sixth port 46. By adjusting the component to switch the refrigerant operating line, the refrigerant circulates in at least one air source heat exchange unit 5, forming a second medium circulation loop. The inlet and outlet of air source heat exchange unit A are connected to the second port 42 and the third port 43, and the inlet and outlet of air source heat exchange unit B are connected to the fourth port 44 and the fifth port 45.

[0029] Preferably, each of the air source heat exchange units 5 includes an evaporator 51 and a compressor 53. The compressor 53 is connected to the evaporator 51, and the medium inlet end of the evaporator 51 and the medium outlet end of the compressor 53 are respectively connected to a six-way valve 4. That is, the medium inlet end of air source heat exchange unit A is connected to the third port 43, and the medium outlet end is connected to the second port 42; the medium inlet end of air source heat exchange unit B is connected to the third and fourth ports 44, and the medium outlet end is connected to the fifth port 45.

[0030] In an optimized implementation, the air source heat exchange unit 5 further includes a gas-liquid separator 52, which is disposed in the pipeline flow path of the evaporator 51 and the compressor 53.

[0031] In an optimized implementation, a heat exchange fan 54 is provided on one side of the evaporator 51 to accelerate heat exchange between the evaporator 51 and the air.

[0032] Optimized implementation methods, as shown in the appendix to the instruction manual. Figure 2 As shown, the regulating assembly includes two four-way diverting valves 47 and a connecting pipe 48. The two four-way diverting valves 47 are connected through the connecting pipe 48. The second medium outlet pipe 31 of the second medium circulation pipeline 3 is connected to one of the four-way diverting valves 47 through a first port 41. The second medium inlet pipe 32 of the second medium circulation pipeline 3 is connected to the other four-way diverting valve 47 through a sixth port 46. The two air source heat exchange units 5 are connected to the two four-way diverting valves 47 in a one-to-one correspondence. Each four-way diverting valve 47 is connected to a driving component, thus having a working position that connects the corresponding air source heat exchange unit 5 to the second medium circulation pipeline 3 and a standby position that disconnects the corresponding air source heat exchange unit 5 from the second medium circulation pipeline 3. The four-way diverting valves are electrically driven to rotate.

[0033] Specifically, see the instruction manual. Figure 2 As shown, the air source heat exchange unit B is supplying heat, and the air source heat exchange unit A is defrosting. The two four-way diverting valves are denoted as four-way diverting valve m and four-way diverting valve n, respectively. Four-way diverting valve m has interfaces m1, m2, m3, and m4, and four-way diverting valve n has interfaces n1, n2, n3, and n4. Preferably, the four-way diverting valve is a disc-shaped electromagnetic diverting valve, with the four interfaces evenly distributed along the circumference of the valve body. Rotating the four-way diverting valve 90° can be used to switch the refrigerant path. Interfaces m1 and m2 are connected via internal conduits, as are interfaces m3 and m4, and interfaces n1 and n2, and interfaces n3 and n4. The two ends of the connecting pipe 48 are respectively connected to interfaces m2 and n4. The first port 41 connects to interface m1 via a conduit, the second port 42 connects to interface m3 via a conduit, the third port 43 connects to interface m4 via a conduit, the fourth port 44 connects to interface n3 via a conduit, and the fifth port 45... The refrigerant in the second medium outlet pipe 31 connects to interface n2 via a pipe. At this point, the refrigerant passes sequentially through the first port 41, interface m1, interface m1, connecting pipe 48, interface n4, interface n3, fourth port 44, air source heat exchange unit B, interface n2, interface n1, and sixth port 46 to the second medium inlet pipe 32. The four-way diverting valve n is in the working position, and the four-way diverting valve m is in the standby position. The air source heat exchange unit B performs heating or cooling operations, while the air source heat exchange unit A enters standby mode (or defrosting mode). Rotating the four-way diverting valve 90° adjusts the interface connecting pipe, thereby adjusting the refrigerant path.

[0034] Figure 2 In the process, rotating the four-way diverter valve m clockwise by 90° puts both four-way diverter valves in the working position, connecting air source heat exchange unit A and air source heat exchange unit B in series with the second medium circulation pipeline 3. Rotating both four-way diverter valves m and n clockwise by 90° puts four-way diverter valve m in the working position and four-way diverter valve n in the standby position. Air source heat exchange unit A is connected in series with the second medium circulation pipeline 3 for cooling or heating, while air source heat exchange unit B is disconnected from the second medium circulation pipeline 3 and enters standby (or defrosting) mode. In low-temperature winter environments, the refrigerant path can be switched as needed, with the two pipelines defrosting alternately to ensure that one pipeline is always operating normally, thus maintaining a stable heating effect.

[0035] In summer, the two sets of air source heat exchange unit circulation pipelines can be turned on independently for low-energy temperature control, or they can be connected in series to start the cooling mode simultaneously, providing a stronger cooling effect for the aquaculture pond.

[0036] Preferably, each pipe is made of low-temperature resistant material, which can operate normally in extreme low-temperature environments and ensure the reliability of the equipment.

[0037] In an optimized implementation, the second medium outlet pipe 31 is provided with a liquid storage tank 33, a filter 34 and a throttle 35 in sequence along the medium flow direction, and the liquid storage tank 33 is used to store refrigerant.

[0038] In an optimized implementation, a one-way valve 36 is provided on the second medium outlet pipe 31, and / or a one-way valve 36 is provided on the second medium inlet pipe 32.

[0039] In an optimized implementation, a circulation pump 23 is provided on the return water pipeline 21.

[0040] In an optimized implementation, a temperature sensor 24 is installed on the water outlet pipe 22 to detect the water temperature in real time.

[0041] Preferably, a controller is also provided, which is electrically connected to the temperature sensor and the four-way diverting valve. The temperature sensor and the controller monitor the ambient temperature and pipeline status in real time, accurately control the cycle switching and defrosting operation, and improve the operating efficiency and stability of the equipment.

[0042] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0043] Those skilled in the art will understand that this invention can be implemented in many other specific forms without departing from the spirit and scope of this invention. Although embodiments of this invention have been described, it should be understood that this invention is not limited to these embodiments, and those skilled in the art can make changes and modifications within the spirit and scope of this invention as defined in the appended claims.

Claims

1. A dual-cycle air source heat pump system, comprising a heat exchanger and a first medium circulation pipeline and a second medium circulation pipeline connected to the heat exchanger, characterized in that, It also includes a six-way valve and two air source heat exchange units. The second medium circulation pipeline and the two air source heat exchange units are respectively connected to the six-way valve. The six-way valve is provided with a regulating component for connecting the second medium circulation pipeline with at least one of the air source heat exchange units.

2. The dual-cycle air source heat pump system according to claim 1, characterized in that, The regulating assembly includes two four-way diverting valves and a connecting pipe. The two four-way diverting valves are connected through the connecting pipe. The second medium outlet pipe of the second medium circulation pipeline is connected to one of the four-way diverting valves, and the second medium inlet pipe of the second medium circulation pipeline is connected to the other four-way diverting valve. The two air source heat exchange units are connected to the two four-way diverting valves in a one-to-one correspondence. Each four-way diverting valve is connected to a driving component, thereby having a working position that connects the corresponding air source heat exchange unit to the second medium circulation pipeline and a standby position that disconnects the corresponding air source heat exchange unit from the second medium circulation pipeline.

3. The dual-cycle air source heat pump system according to claim 2, characterized in that, Each of the four-way diverting valves includes two built-in pipelines and four diverting ports. The diverting ports are arranged in pairs and are connected to one of the built-in pipelines respectively. When in the standby position, the medium inlet and outlet pipes of the air source heat exchange unit are connected to one of the built-in pipelines.

4. The dual-cycle air source heat pump system according to claim 2, characterized in that, The second medium outlet pipe is provided with a liquid storage tank, a filter and a flow throttle in sequence along the medium flow direction.

5. The dual-cycle air source heat pump system according to claim 2, characterized in that, The second medium outlet pipe is equipped with a check valve, and / or the second medium inlet pipe is equipped with a check valve.

6. The dual-cycle air source heat pump system according to claim 1, characterized in that, Each of the air source heat exchange units includes an evaporator and a compressor. The compressor is connected to the evaporator, and the medium inlet end of the evaporator and the medium outlet end of the compressor are respectively connected to a six-way valve.

7. The dual-cycle air source heat pump system according to claim 6, characterized in that, The air source heat exchange unit also includes a gas-liquid separator, which is disposed in the pipeline flow path of the evaporator and the compressor.

8. The dual-cycle air source heat pump system according to claim 6, characterized in that, A heat exchange fan is provided on one side of the evaporator.

9. The dual-cycle air source heat pump system according to claim 1, characterized in that, The first medium circulation pipeline includes a return water pipeline and an outlet water pipeline, which are respectively connected to the heat exchanger. A circulation pump is provided on the return water pipeline.

10. The dual-cycle air source heat pump system according to claim 9, characterized in that, A temperature sensor is installed on the water outlet pipe.

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