Plate heat exchanger and fluid distributor thereof and control method for plate heat exchanger

Abstract

The invention discloses a fluid distributor for a plate heat exchanger. A distribution hole (11) for a refrigerant to flow into a refrigerant channel (202) is arranged at the position of the plate heat exchanger corresponding to the refrigerant channel (202) of the plate heat exchanger, and the fluid distributor comprises a driving component (2) and an execution component (3) for adjusting the size of an opening of the distribution hole (11) under the driving of the driving component (2). The plate heat exchanger can adjust pressure and temperature of the refrigerant, the refrigerant evenly enters a heat exchange channel, and heat exchange stability of the plate heat exchanger is improved. The invention further discloses the plate heat exchanger comprising the fluid distributor and a control method for the plate heat exchanger. The plate heat exchanger comprising the fluid distributor and the control method for the plate heat exchanger have identical effect.

Description

technical field [0001] The invention relates to the technical field of air-conditioning equipment, in particular to a plate heat exchanger and a fluid distributor for the above-mentioned equipment. The invention also relates to a control method of the plate heat exchanger. Background technique [0002] Plate heat exchanger is a heat exchanger with compact structure and high efficiency. It is widely used in power, chemical industry, food, air conditioning, heating and machinery industries. It is also a new energy equipment such as waste heat utilization, solar energy utilization, seawater Utilization, the key device in geothermal utilization. [0003] The plate heat exchanger is formed by stacking multiple punched and formed thin plates through bolts or welding. The multiple plates are separated to form alternate refrigerant channels and heat exchange fluid channels, and there is a refrigerant channel at one end of the heat exchanger. Inlet and heat exchange fluid outlet, t...

AI Technical Summary

Problems solved by technology

[0005] However, after the refrigerant is throttled and depressurized by the expansion valve, it has been partially evaporated and evaporated before flowing into the evaporator, so it is unevenly distributed in the refrigerant passages between the plates of the evaporator, and some refrigerant liquids in the refrigerant passages More, some refrigerant channels have more refrigerant gas, resulting in uneven heat transfer of the plate heat exchanger, lower overall heat transfer coefficient, and unstable heat transfer performance

In severe cases, such as when the refrigerant is water, the water in the refrigerant channel may even freeze, resulting in the loss of the function of the heat exchanger

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