热泵机组

Abstract

本实用新型提供了一种热泵机组，热泵机组具有制冷模式和除霜模式，热泵机组包括换热模块、第二换热器、压缩机、节流模块，换热模块包括蒸发式冷凝器和第一换热器；在制冷模式下，蒸发式冷凝器和第一换热器串联，压缩机、换热模块、节流模块、第二换热器首尾顺次连通；在除霜模式下，蒸发式冷凝器和第一换热器并联，压缩机、换热模块、节流模块、第二换热器首尾顺次连通。通过本实用新型提供的技术方案，提高了制冷模式下的热泵机组的制冷效果并有利于减少热泵机组在低温环境下制热时第一换热器的换热管表面的结霜，且有利于缩短了除霜频率和单次除霜时间，提高除霜效率，在提高了热泵机组的性能的同时使得热泵机组的适用温域更广。

Claims

1. A heat pump unit, characterized by The heat pump unit has a cooling mode, a heating mode, and a defrosting mode. The heat pump unit includes a heat exchange module (10), a second heat exchanger (20), a compressor (30), and a throttling module (40). The heat exchange module (10) includes an evaporative condenser (11) and a first heat exchanger (12). In the refrigeration mode, the evaporative condenser (11) and the first heat exchanger (12) are connected in series, and the compressor (30), the heat exchange module (10), the throttling module (40), and the second heat exchanger (20) are connected in sequence from end to end; In the heating mode, the evaporative condenser (11) and the first heat exchanger (12) are connected in parallel, and the compressor (30), the second heat exchanger (20), the throttling module (40), and the heat exchange module (10) are connected in sequence from end to end; In the defrosting mode, the evaporative condenser (11) and the first heat exchanger (12) are connected in parallel, and the compressor (30), the heat exchange module (10), the throttling module (40), and the second heat exchanger (20) are connected sequentially from end to end.

2. The heat pump unit according to claim 1, characterized in that, The heat exchange module (10) includes a first parallel pipeline (13) that can be switched on and off, a second parallel pipeline (16) that can be switched on and off, and a series pipeline (14) that can be switched on and off. The evaporative condenser (11) and the first heat exchanger (12) are connected in parallel through the first parallel pipeline (13) and the second parallel pipeline (16). The compressor (30) is connected to the first parallel pipeline (13). The throttling module (40) is connected to the second parallel pipeline (16). The two ends of the series pipeline (14) are connected to the first parallel pipeline (13) and the second parallel pipeline (16) respectively.

3. The heat pump unit of claim 2, wherein, The two ends of the first parallel pipeline (13) are respectively connected to one end of the evaporative condenser (11) and one end of the first heat exchanger (12), and the compressor (30) is connected to the non-end position of the first parallel pipeline (13); the two ends of the second parallel pipeline (16) are respectively connected to one end of the evaporative condenser (11) and one end of the first heat exchanger (12), and the throttling module is connected to the non-end position of the second parallel pipeline (16); The first parallel pipeline (13) is connected to at least one of the evaporative condenser (11) and the first heat exchanger (12) in a switchable manner; the second parallel pipeline (16) is connected to at least one of the evaporative condenser (11) and the first heat exchanger (12) in a switchable manner.

4. The heat pump unit of claim 2, wherein, The compressor (30) is connected to the first parallel pipeline (13) at the first connection position (501), the throttling module (40) is connected to the second parallel pipeline (16) at the second connection position (502), the series pipeline (14) is connected to the first parallel pipeline (13) at the third connection position (503), and the series pipeline (14) is connected to the second parallel pipeline (16) at the fourth connection position (504). The first parallel pipeline (13) between the first connecting position (501) and the third connecting position (503) is a first pipe segment (1311), and the first pipe segment (1311) can be connected and disconnected. The second parallel pipeline (16) between the second connecting position (502) and the fourth connecting position (504) is a second pipe segment (1611), which can be connected and disconnected.

5. The heat pump unit of claim 4, wherein, The heat exchange module (10) also includes an electric ball valve (15), which is provided on the series pipeline (14), the first pipe section (1311), and the second pipe section (1611) to adjust the minimum flow rate of the series pipeline (14), the first pipe section (1311), and the second pipe section (1611).

6. The heat pump unit of claim 5, wherein, The heat pump unit also includes a four-way reversing valve (70). The compressor (30) is connected to the second heat exchanger (20) and the heat exchange module (10) respectively through the four-way reversing valve (70). The four-way reversing valve (70) and a plurality of electric ball valves (15) are adjustablely configured so that the heat pump unit forms different flow paths in different modes. The four-way reversing valve (70) has a first adjustment state and a second adjustment state. In the refrigeration mode, the electric ball valve (15) on the first pipe section (1311) and the electric ball valve (15) on the second pipe section (1611) are both closed, the electric ball valve (15) on the series pipeline (14) is open, and the four-way reversing valve (70) is in the first adjustment state. In the heating mode, the electric ball valve (15) on the first pipe section (1311) and the electric ball valve (15) on the second pipe section (1611) are both open, the electric ball valve (15) on the series pipeline (14) is closed, and the four-way reversing valve (70) is in the second regulating state. In the defrosting mode, the electric ball valve (15) on the first pipe section (1311) and the electric ball valve (15) on the second pipe section (1611) are both open, the electric ball valve (15) on the series pipeline (14) is closed, and the four-way reversing valve (70) is in the first adjustment state.

7. The heat pump unit of claim 2, wherein, The connection position between the compressor (30) and the first parallel pipeline (13) is the first connection position (501). The portion of the first parallel pipeline (13) between the first connection position (501) and the evaporative condenser (11) is the first parallel section (131). The other portion of the first parallel pipeline (13) between the first connection position (501) and the first heat exchanger (12) is the second parallel section (132). In the defrosting mode, the minimum flow rate of the first parallel section (131) is less than the minimum flow rate of the second parallel section (132).

8. The heat pump unit of claim 2, wherein, The compressor (30) is connected to the first parallel pipeline (13) at the first connection position (501), the throttling module (40) is connected to the second parallel pipeline (16) at the second connection position (502), the portion of the first parallel pipeline (13) between the first connection position (501) and the evaporative condenser (11) is the first parallel section (131), and the portion of the second parallel pipeline (16) between the second connection position (502) and the first heat exchanger (12) is the third parallel section (161); the two ends of the series pipeline (14) are connected to the first parallel section (131) and the third parallel section (161) respectively.

9. The heat pump unit according to claim 1, characterized in that, In the cooling mode, the fluid flow direction in the heat pump unit is the same as that in the defrosting mode, and in the cooling mode, the fluid flow direction in the heat pump unit is opposite to that in the heating mode. In the refrigeration mode, the compressor (30), the heat exchange module (10), the first heat exchanger (12), the evaporative condenser (11), and the second heat exchanger (20) are connected in sequence from end to end, and the direction of the compressor (30) toward the heat exchange module (10) is the direction of fluid flow.

10. The heat pump unit of claim 1, wherein, The throttling module (40) includes a main pipeline and a first expansion valve (47) disposed on the main pipeline. The two ends of the main pipeline are respectively connected to the heat exchange module (10) and the second heat exchanger (20).

11. The heat pump unit of claim 10, wherein, The throttling module (40) includes a first adapter pipe (41), a second adapter pipe (42), a third adapter pipe (43), a fourth adapter pipe (44), a fifth adapter pipe (45), and a plurality of one-way valves (46) respectively disposed on the first adapter pipe (41), the second adapter pipe (42), the fourth adapter pipe (44), and the fifth adapter pipe (45), and the first expansion valve (47) is disposed on the third adapter pipe (43); In the cooling mode and the defrosting mode, the first adapter pipe (41), the third adapter pipe (43), and the fifth adapter pipe (45) form the main pipeline; In the heating mode, the second adapter pipe (42), the third adapter pipe (43), and the fourth adapter pipe (44) form the main pipeline.

12. The heat pump unit of claim 10, wherein, The heat pump unit also includes an economizer (61) and a second expansion valve (62). The economizer (61) is located on the main pipeline and connected to the compressor (30) through a return pipe (63). The second expansion valve (62) is located on the return pipe (63).

13. The heat pump unit of claim 1, wherein, The first heat exchanger (12) is an air-side heat exchanger, the second heat exchanger (20) is a water-side heat exchanger, the evaporative condenser (11) comprises a heat exchange assembly, a spraying assembly, a collecting tank, a filler and a fan, the spraying assembly, the heat exchange assembly and the collecting tank are sequentially distributed from top to bottom, the heat exchange assembly comprises copper heat exchange pipes for circulating refrigerant, the spraying assembly is arranged towards the copper heat exchange pipes, the collecting tank collects cooled water after heat exchange, the collecting tank is connected with the spraying assembly through a water supply pipeline, the filler has a porous structure, the heat exchange assembly, the filler and the collecting tank are sequentially arranged from top to bottom, and the heat exchange assembly and the fan are horizontally spaced.

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