Cocurrent flow heat converter special for air conditioner

Abstract

The invention provides a parallel flow heat exchanger for an air conditioner, comprising a row of heat exchanging flat pipes which are arranged in parallel, wherein, collecting pipes are mounted on the two interfaces of the heat exchanging flat pipes which are arranged in parallel. The invention is characterized in that the clear spacing between the heat exchanging flat pipes which are arranged in parallel ranges from 1.0 millimeter to 5.8 millimeters. The refrigerating medium enters through the collecting pipe on one interface of the flat pipes arranged in parallel, flows through the flat pipes arranged in parallel and flows out through the collecting pipe on the other interface. The refrigerating medium flows through the flat pipes arranged in parallel and exchanges heat with the air outside the flat pipes, thereby fulfilling the purpose of heat exchange. The invention is an all aluminium heat exchanger, thereby greatly lowering the production cost. The parallel flow heat exchanger for the air conditioner has the characteristics that the heat exchanging ability is great, the radiating aluminium sheet does not need to be sleeved or welded and the shortcomings caused by the radiating aluminium sheet are eliminated.

Description

[0001] The invention relates to a parallel flow heat exchanger specially used for air conditioners, in particular to a parallel flow heat exchanger specially used for heat exchange flat tubes of air conditioners. Background technique [0002] The air conditioner of the present invention includes automobile air conditioners, household air conditioners and other small air conditioners. Its basic structure of known air conditioner all is made up of two parts at present, promptly is made up of the evaporating unit that refrigerant evaporates and absorbs heat and the condensing unit that refrigerant condenses and releases heat. The part of the evaporating unit where the refrigerant evaporates and absorbs the heat of the indoor air is usually called the evaporator, and the part of the condensing unit where the refrigerant condenses and releases heat to the outdoor air is usually called the condenser. Both the evaporator and the condenser are heat exchangers, and the heat exchanger i...

AI Technical Summary

Problems solved by technology

However, there are still some shortcomings in the technical structure of the existing parallel flow heat exchanger, which seriously affects its wider application.

The parallel flow heat exchanger has the following main disadvantages: in order to reduce the manufacturing cost, its basic material is an aluminum-based alloy, which makes the heat exchange capacity of the parallel flow heat exchanger of the same volume lower than that of the copper tube fin and tube belt type For heat exchangers, to improve the heat exchange capacity, the only way to increase the volume of the heat exchanger is to expand the volume of the heat exchanger. However, some air-conditioning heat exchangers have very limited space, such as household air conditioners. The parallel flow heat exchanger designed according to the size of these limited spaces It is impossible to meet the required heat exchange capacity of the heat exchanger. Only by expanding the application space can it be used in this type of air conditioner, but this will increase the production cost and lose the low cost advantage of the parallel flow heat exchanger. The alternative use of parallel flow heat exchangers on these air conditioners is limited; corrugated heat dissipation aluminum sheets need to be welded outside the heat exchange flat tubes of parallel flow heat exchangers. With use for a certain period of time, the welds between the welds will Oxidation will be accelerated, the weld will become loose, and the heat dissipation performance will be rapidly attenuated. The gap between the heat dissipation aluminum sheets is very small, and the dirt and dust on the heat dissipation aluminum sheets cannot be cleaned thoroughly. After long-term use, it will also cause a sharp decline in heat transfer performance. If If it is an evaporator, the dirt remaining on it will cause a large number of germs to multiply and affect the health of the user; because the heat dissipation aluminum sheet has a corrugated structure, when the parallel flow heat exchanger is used as an evaporator, there will be The condensed water accumulated in the hollow part of the corrugated fins between the tubes cannot be discharged smoothly, which reduces the heat exchange capacity. When used for heat pump air conditioning heating, the condensed water accumulated on the corrugated aluminum fins will frost. The heat pump The air conditioner cannot heat normally, which is the main reason why the parallel flow heat exchanger cannot be applied to the heat pump air conditioner

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