Novel plate type heat exchanger liquid divider

Abstract

The invention relates to a novel plate type heat exchanger liquid divider which belongs to the technical field of a refrigeration air conditioning machine set equipped with a plate type heat exchanger and utilizing a four-way valve for carrying out refrigeration and heating switching. The invention aims at breaking through the technical bottle neck that a refrigerating agent is distributed unevenly in plate sheets when the plate type heat exchanger is used as an evaporator, and by the invention, the refrigerating agent can be uniformly distributed into each plate sheet of the plate type heat exchanger and the heat exchange efficiency and the energy saving effect can be improved, and meanwhile, the use effect of the plate type heat exchanger used as a condenser can be ensured after the refrigeration and heating switching. In order to solve the problem, the invention has the main technical scheme that the novel plate type heat exchanger liquid divider is additionally arranged at the side of a refrigerating fluid pipe of the plate type heat exchanger, the throttled refrigerating agent is uniformly distributed into each plate sheet through small liquid dividing holes when the plate type heat exchanger is used as an evaporator, and super-cooling liquid flows out from the plate type heat exchanger from a one-way valve of the liquid divider after the refrigerating and heating switching when the plate type heat exchanger is used as a condenser.

Description

technical field [0001] The unit is equipped with a plate heat exchanger and uses a four-way valve to switch between cooling and heating operations. Background technique [0002] In the refrigerating and air-conditioning unit equipped with a plate heat exchanger on the unit and using a four-way valve to switch between cooling operation and heating operation, when the plate heat exchanger is used as an evaporator, the refrigerant vapor-liquid after being throttled by the expansion valve The two-phase mixture cannot be evenly distributed to each plate of the plate heat exchanger, more refrigerant is distributed in the plates near the refrigerant inlet side, and less refrigerant is distributed in the plates farther from the refrigerant inlet side . As a result, the heat exchange area of ​​the plate heat exchanger is not fully utilized, and the heat exchange efficiency is low. In order to achieve the required cooling capacity and energy efficiency ratio, a plate heat exchanger ...

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Problems solved by technology

[0003] The technical problem to be solved in the present invention is: to overcome the deficiency of the background technology, to break through the technical bottleneck of the uneven distribution of the refrigerant when the plate heat exchanger is used as an evaporator, and to make the refrigerant gas-liquid two-phase mixture throttling through the expansion valve Evenly distributed to each plate of the plate heat exchanger to improve heat transfer efficiency and energy saving effect; at the same time, ensure that after switching between cooling and heating operation modes, it will not affect the use effect of the plate heat exchanger when it is used as a condenser

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