A flow equalizing distributor used in the tube box of a dry shell-and-tube evaporator

Abstract

The invention discloses a flow equalizing distributor used in the tube box of a dry-type shell-and-tube evaporator, which includes a cone, a spiral piece and a foot; the spiral piece is fixed on the outside of the cone surface of the cone, and spirals upward from the bottom of the cone to the top For setting, one end of the leg is connected with the circumference of the bottom of the cone, and the other end is connected with the circumference of the refrigerant inlet on the end cover of the evaporator. The invention is installed at the refrigerant inlet in the tube box of the dry-type shell-and-tube evaporator, and through the guiding effect on the refrigerant, the gas-liquid two-phase refrigerant fluid in the tube box is disturbed more violently and chaotically, thereby achieving uniformity The role of distribution; the present invention realizes the uniform distribution of the refrigerant without increasing the pressure drop. The experiment proves that the efficiency of the heat exchanger of the evaporator is significantly improved after using the present invention, so that the energy efficiency ratio of the refrigeration system is significantly improved, realizing Energy-saving and efficient operation of the refrigeration system.

Description

technical field [0001] The invention relates to the field of refrigeration and air conditioning, in particular to a flow equalizing distributor used in a tube box of a dry shell-and-tube evaporator. Background technique [0002] At present, in the field of refrigeration and air conditioning, dry shell-and-tube evaporators are generally used as the main heat exchange equipment in large-scale central air-conditioning and refrigeration hosts. Compared with flooded evaporators, dry evaporators have a lower Cost, and the refrigerating unit using the dry evaporator has a simple structure and simple control, so the dry evaporator is widely used. However, as the society has higher and higher requirements for energy conservation and environmental protection, how to improve the energy efficiency ratio of the refrigeration unit becomes particularly important, and how the heat transfer efficiency of the evaporator directly determines the energy efficiency ratio of the refrigeration unit...

AI Technical Summary

Problems solved by technology

However, since the refrigerant is in a gas-liquid two-phase state when it enters the evaporator, the use of ordinary flow-balancing baffles can only alleviate the problem of uneven distribution to a certain extent, but cannot completely solve the problem of uniform distribution.

Now there is also a method of using pressure equalizing chamber and capillary tube for flow equalization distribution. The refrigerant first enters the pressure equalizing chamber and then distributes to each heat exchange tube through the capillary on the liquid equalizing plate. Each tube hole corresponds to a capillary tube. However, the processing technology of the equalizing plate and capillary is complicated, and both the equalizing chamber and the capillary will cause a large pressure drop, which will affect the energy efficiency ratio of the entire refrigeration system

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