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Falling-film evaporation device

A technology of falling film evaporation and evaporating coils, applied in evaporators/condensers, refrigeration components, refrigerators, etc., can solve the problem of lubricating oil participating in the cycle, and achieve fast heat transfer, simple oil return, and easy control Effect

Inactive Publication Date: 2014-08-27
TIANJIN UNIV OF COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Therefore, whether it is a horizontal falling film evaporator or a flooded evaporator, there are problems of system oil return and lubricating oil participating in the circulation

Method used

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  • Falling-film evaporation device

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Embodiment Construction

[0015] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0016] The schematic diagram of the falling film evaporation device of the present invention is as figure 1 As shown, it includes a cylinder 4, a liquid distributor 2, an evaporation coil 1 and a plurality of heat exchange tubes 3. The cylinder 4 is arranged in a horizontal direction, and the heat exchange tubes 3 are arranged parallel to each other in the horizontal direction. In the middle and lower part of the cylinder body 4, the evaporation coil 1 is installed on the upper part of the cylinder body 4, and the liquid distributor is installed between the evaporation coil 1 and the topmost heat exchange tube 2. The lowermost layers of the heat exchange tubes are immersed in the saturated liquid, and the space in the cylinder 4 outside the saturated liquid is filled with saturated gas. In this embodiment, the heat exchange tubes 3 immersed in the saturated l...

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Abstract

The invention discloses a falling-film evaporation device. According to the falling-film evaporation device, heat exchange is achieved through evaporation and condensation of saturated liquid. A barrel is horizontally arranged. A plurality of heat exchange tubes are horizontally arranged on the lower middle portion inside the barrel in parallel. An evaporation coil is arranged on the upper portion of the barrel. A liquid distributor is installed between the evaporation coil and the topmost heat exchange tube. The several bottommost heat exchange tubes are immersed in the saturated liquid. The space, outside the saturated liquid, in the barrel is filled with saturated gas. The heat exchange tubes are filled with flowing secondary refrigerant. The evaporation coil servers as an evaporator of a refrigeration system and is filled with flowing refrigerant. The refrigerant is evaporated in the evaporation coil, lubricating oil directly flows back to a compressor along with the evaporated refrigerant, the saturated liquid does not contain the lubricating oil, no oil film is attached to the heat tubes, and therefore the heat transfer coefficient is increased. Meanwhile, no oil return device is needed, and therefore oil return of refrigeration system is simple.

Description

Technical field [0001] The invention relates to an evaporation device, and more specifically, to a falling film evaporation device that utilizes saturated fluid evaporation and condensation to realize heat exchange. Background technique [0002] Horizontal falling film evaporators and flooded evaporators are widely used in air conditioning and refrigeration systems due to their high heat exchange efficiency. The horizontal falling film evaporator has a small refrigerant charge and no boiling point increase caused by static pressure head. However, the refrigerant liquid that cannot be evaporated must be lifted to the liquid distributor installed on the upper part of the evaporator by means of a canned motor pump. The refrigerant liquid achieves falling film evaporation, but in the cycle, the refrigerating oil sinks at the bottom of the falling film evaporator, and a separate oil return pipe is required to return the oil; the flooded evaporator is to immerse the water pipe in the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B39/02
Inventor 杨永安刘永超苏城
Owner TIANJIN UNIV OF COMMERCE
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