Flow divider, heat exchanger and air conditioner

Abstract

The invention provides a flow divider, a heat exchanger and an air conditioner. The flow divider comprises an inner pipe and an outer pipe, the outer pipe is arranged outside the inner pipe in a sleeving mode, and a flow dividing cavity is formed between the inner pipe and the outer pipe. A plurality of branch pipe connectors communicated with the flow dividing cavity are formed in the outer pipe, a first end of the outer pipe is connected with the outer wall of the inner pipe in a sealed mode, a second end of the outer pipe is a closed end, a second end of the inner pipe is an open end and communicated with the flow dividing cavity, and a flow dividing cone facing the second end of the inner pipe is arranged on the inner wall of the second end of the outer pipe. As the flow dividing cone facing the second end of the inner pipe is arranged on the inner wall of the second end of the outer pipe, when reaching the flow dividing end (the second end), a gas working medium and a liquid working medium in the inner pipe firstly make contact with the flow dividing cone. In the flowing process of the working media, as the section area between the flow dividing cone and the inner wall of the inner pipe gradually becomes smaller, the flow rate is increased, the mixing uniformity of the gas working medium and the liquid working medium is improved, the mixed working media are evenly distributed to all flow dividing branch pipes, and the flow dividing effect is improved.

Description

technical field [0001] The invention relates to the field of heat exchange devices, in particular to a flow divider, a heat exchanger, and an air conditioner. Background technique [0002] In the prior art, the general working fluid splitting method of the copper tube heat exchanger is "copper tube + flow divider + liquid separation capillary". This diversion method has limitations, and it is difficult to divide the gas-liquid two-phase working fluid evenly, as follows: [0003] 1. The space position is highly required, and the direction of the shunt must be placed vertically upward or downward, otherwise the uniformity of the shunt will be reduced; [0004] 2. Occupying space, the shunt and shunt capillary have a minimum space size requirement, and the heat exchanger needs to reserve a large assembly space; [0005] 3. The process is complicated and unreliable. The shunt capillary and the shunt are connected by welding, the process is complicated, and it is easy to cause ...

AI Technical Summary

Problems solved by technology

[0003] 1. The space position is highly required, and the direction of the shunt must be placed vertically upward or downward, otherwise the uniformity of the shunt will be reduced;

[0004] 2. Occupying space, the shunt and shunt capillary have a minimum space size requirement, and the heat exchanger needs to reserve a large assembly space;

[0005] 3. The process is complicated and unreliable. The shunt capillary and the shunt are connected by welding, the process is complicated, and it is easy to cause problems such as welding blockage and overheating;

[0006] 4. The processing of the shunt is complicated, and it is difficult to ensure the uniformity of the shunt. For the heat exchanger with a large number of shunts, the shunt is difficult to process and the uniformity of the shunt is difficult to guarantee;

[0007] 5. The mixing degree of the gas-liquid two-phase working medium is low, especially for the system where the throttling is on the condenser side and the flow is split on the evaporator side. The degree of mixing of liquid and two phases is low;

[0008] 6. Abnormal noise. The working medium enters the shunt from the copper pipe, and then shunts. After many times of drastic changes in the cross-sectional area of ​​the flow path, there is often abnormal noise.

[0009] To sum up, if the flow in the heat exchanger is uneven, the flow rate of the working fluid in the copper tubes of each branch will be different.

Under the same heat exchange conditions, due to the different flow rate of the working medium in each branch copper tube, the heat exchanger efficiency of each branch copper tube will be different, which will reduce the overall heat exchange efficiency and utilization of the heat exchanger as a whole. Rate

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