Parallel flow heat exchanger and air conditioner
A parallel flow heat exchanger and header technology, applied in evaporators/condensers, lighting and heating equipment, refrigeration components, etc., can solve uneven heating distribution, decrease in heat exchange, and increase defrosting time, etc. It can solve the problem of non-uniform cooling and heating flow paths, improve heat exchange performance, and improve uniformity.
Active Publication Date: 2015-09-30
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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Problems solved by technology
[0003] However, when the existing parallel flow heat exchanger is directly used for the outdoor unit of the heat pump, it is easy to have difficulties in defrosting and drainage and uneven distribution
At present, one solution is to improve the drainage performance by changing the structure of the fins, but when the parallel flow heat exchanger is used as the condenser of the outdoor unit, there will be switching of cooling and heating flow paths, and when the outdoor heat exchanger is used as the heating evaporator , there will still be the problem of uneven distribution of refrigerant
[0004] At present, it is also possible to solve the problem of uneven heating and distribution by dividing the heat exchanger into multiple chambers. However, when cooling, the shunt pipe close to the partition must be close to the partition, otherwise, the refrigerant will easily accumulate in the corresponding header. , so that the flow rate of the refrigerant in the flat tube corresponding to this part of the header is low, and the heat transfer is reduced
However, with this arrangement, the flat tubes close to the partition are prone to frosting. For the refrigeration system that defrosts by switching the four-way valve, the temperature of this part of the flat tubes is the lowest when defrosting, and the frosting is the most serious, making it difficult to clean the frost layer. Or you need to increase the defrosting time
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[0037] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0038] Such as figure 1 , Figure 4 and Figure 5 As shown, the first embodiment of the present invention proposes a parallel flow heat exchanger, which can be used as both a condenser and an evaporator. The parallel flow heat exchanger includes: a left header 3, a right header 31 and several flat tubes 4 connected between the left header 3 and the right header 31 (that is, one end of the flat tube 4 communicates with the left header 3, and the other end of the flat tube 4 communicates with the right header 31), fins 5 are arranged between adjacent flat tubes; the parallel flow heat exchanger also includes at least one separator, at least one distributor, and several Manifold: at least one spacer is arranged on the left header 3, and in the cooling state, pass through the at least one spacer on the flat tube 4 betw...
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The invention discloses a parallel-flow heat exchanger and an air conditioner. The heat exchanger comprises a left collecting main, a right collecting main, a plurality of flat pipes, at least one spacer, at least one distributor and a plurality of distributing pipes; the flat pipes are connected between the left collecting main and the right collecting main; the distributing pipes are connected among the distributors and the right collecting main; the spacers are arranged on the left collecting main, and at least two refrigerating circuits are formed on the flat pipes between the left collecting main and the right collecting main in a refrigerating state; a one-way heating circuit is formed on the flat pipes between the left collecting main and the right collecting main in a heating state; and the one-way heating circuit is divided into a plurality of secondary flow paths by the distributors and the distributing pipes. The parallel-flow heat exchanger and the air conditioner have the advantages that a certain quantity of spacers is arranged inside the collecting mains, check valves and the distributors are added to the outside of the heat exchanger, at least two circuit flow paths are formed when the heat exchanger is used as a condenser, and accordingly the heat exchange capacity of the heat exchanger is improved; and the single circuit is formed when the parallel-flow heat exchanger is used as an evaporator, and can be divided into the multiple secondary flow paths according to the quantity of the flat pipes, accordingly, the uniformity of refrigerants flowing into each flat pipe is improved, and the heat exchange performance of the heat exchanger is improved.
Description
technical field [0001] The invention relates to the technical field of air conditioning, in particular to a parallel flow heat exchanger and an air conditioner. Background technique [0002] Parallel flow heat exchanger, also known as micro-channel heat exchanger, adopts flat tube enhanced heat transfer technology. It is a porous aluminum flat tube heat exchanger. Its structure is to use louver fins on the air side and small The diameter of the multi-channel flat tube enhances the heat exchange between the air side and the refrigerant side. It has the advantages of high heat transfer efficiency, compact structure, light weight, less refrigerant charge, and easy recovery. It is gradually used in household air conditioners. get applied. [0003] However, when the existing parallel-flow heat exchanger is directly used for the outdoor unit of the heat pump, it is easy to have difficulties in defrosting and water drainage, and uneven flow distribution. At present, one solution ...
Claims
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IPC IPC(8): F25B39/02F25B39/04
Inventor 徐龙贵程志明汪剑波黄小军
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD