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Falling film evaporator and refrigerating system adopting same

A falling-film evaporator and refrigerant technology, applied in evaporators/condensers, refrigerators, refrigeration components, etc., can solve the problems of turbulent flow state, liquid backflow from compressors, and easy splashing of droplets, etc. The effect of helping gas-liquid separation

Active Publication Date: 2020-10-30
NINGBO FOTILE KITCHEN WARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for the above-mentioned falling film evaporator, although the setting of the cover plate can prevent the liquid-phase refrigerant from being directly sucked into the compressor, the flow state of the throttled refrigerant is in a gas-liquid two-phase state, and its flow state is very Turmoil, the liquid droplets sprayed by the sprinkler are easy to splash, and are sucked away by the compressor together with the gas phase, resulting in the problem of liquid return from the compressor

Method used

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  • Falling film evaporator and refrigerating system adopting same
  • Falling film evaporator and refrigerating system adopting same
  • Falling film evaporator and refrigerating system adopting same

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0046] Such as Figure 1 to Figure 4Shown is the first preferred embodiment of the falling film evaporator of the present invention. The falling film evaporator includes a shell 1, a distributor 2, a heat exchange tube group, a liquid baffle 4 and a cover plate 5, and the distributor 2, a heat exchange tube group, a liquid baffle 4 and a cover plate 5 are all located in the shell Inside body 1. The falling film evaporator forms a refrigeration system together with the compressor and the condenser, and the compressor, the condenser and the falling film evaporator are sequentially connected through refrigerant pipelines to form a loop.

[0047] Among them, two inlets 11 for the refrigerant to enter are opened on the front and rear of the peripheral wall of the housing 1, and the inlets 11 are connected to the condenser through a throttling element; the top of the housing 1 is opened with an outlet 12 for the refrigerant to discharge, and the outlet 12 is connected to the sucti...

Embodiment 2

[0054] Such as Figure 5 and Figure 6 Shown is the second preferred embodiment of the falling film evaporator of the present invention. The difference with Example 1 is:

[0055] In this embodiment, the peripheral wall of the shower pipe 21 is closely attached to the bottom surface of the cover plate 5 , and the part of the peripheral wall of the shower pipe 21 without the spray hole 211 is located in the buffer area 51 . Such as Figure 6 As shown, the liquid baffle 4 in this embodiment is in the shape of a flat plate, and the front and rear side edges are in contact with the peripheral wall of the spray pipe 21. Of course, a cylindrical liquid baffle 4 can also be used to penetrate the spray pipe 21. In the space surrounded by the liquid baffles 4, the purpose of saving space can also be achieved; in addition, the spray pipe 21 can be arranged straight and the liquid baffles 4 are curved to achieve the same effect. However, the curved arrangement of the spray pipe 21 ca...

Embodiment 3

[0057] Such as Figure 5 and Figure 6 Shown is the second preferred embodiment of the falling film evaporator of the present invention. The difference with Example 1 is:

[0058] In this embodiment, the liquid baffle 4 is basically arranged horizontally, and forms a cavity with the cover plate 5 as the above-mentioned buffer area 51. There is a gap between the left and right side edges of the liquid plate 4 and the baffle plate 53 as the above-mentioned opening 41; the shower pipe 41 is arranged below the liquid baffle plate 4, and the spray hole 211 of the shower pipe 21 is arranged at a position corresponding to On the peripheral wall of the spray pipe 21 at the central part of the liquid baffle 4, the opening 41 of the liquid baffle 4 and the spray hole 211 of the spray pipe 21 are staggered; the air outlet 52 of the cover plate 5 is arranged at the central part.

[0059] In addition, in this embodiment, a vertical baffle 6 is added. The vertical baffle 6 is S-shaped in...

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PUM

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Abstract

The invention discloses a falling film evaporator. The falling film evaporator comprises a shell (1), a spraying pipe (21), a heat exchange pipe set, a liquid baffle (4) and a cover plate (5), whereinthe spraying pipe (21), the heat exchange pipe set, the liquid baffle (4) and the cover plate (5) are positioned in the shell (1); the shell (1) is provided with a communicating inlet (11) and an outlet (12); the end of the spraying pipe (21) communicates with the inlet (11); the liquid baffle (4) is positioned below the cover plate (5), and a buffer area (51) is formed between the liquid baffle(4) and the cover plate (5); the liquid baffle (4) is at least provided with an opening (41) communicating with the buffer area (51) and an inner cavity of the shell (1); the cover plate (5) is provided with an air outlet hole (52) communicating with the buffer area (51) and the inner cavity of the shell (1); and the peripheral wall where at least spraying holes (211) of the spraying pipe (21) arepositioned is positioned outside the buffer area (51). Compared with the prior art, the falling film evaporator can prevent a liquid-phase refrigerant from being sucked away by a compressor along with a gas phase.

Description

technical field [0001] The invention relates to the technical field of evaporators, in particular to a falling film evaporator and a refrigeration system using the falling film evaporator. Background technique [0002] The working principle of the falling film evaporator is: the refrigerant liquid condensed from the condenser expands through the throttling device to form a gas-liquid two-phase refrigerant. Driven by pressure, the gas-liquid two-phase refrigeration The refrigerant enters the distributor at the top of the evaporator and is distributed through multiple stages. Finally, the refrigerant is left from the distribution hole at the bottom of the distributor and drops on the heat exchange tube of the evaporator. From top to bottom, it drips down to the heat exchange tube below, so that the refrigerant evaporates, and the heat is transferred from the medium in the heat exchange tube to the refrigerant, thereby achieving the cooling effect. In the above process, the mo...

Claims

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Application Information

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IPC IPC(8): F25B39/02F25B1/00
CPCF25B1/00F25B39/022F25B39/028
Inventor 郭俊杰
Owner NINGBO FOTILE KITCHEN WARE CO LTD