Heat exchanger

Abstract

The invention relates to a heat exchanger that sets at least a distribution diversion baffle at secondary refrigerant intake end of evaporator. By setting diversion mouths at two sides of baffle, the liquid secondary refrigerant would be sent to the intake baffle of evaporator and could be equally flowing into evaporator to increase flow effect in evaporator. Flow boiling effect would be formed in heating pipe to improve heat exchanging benefit of evaporator, and decrease heating pipe quantity. The producing cost would be lowered.

Description

technical field [0001] The present invention relates to a heat exchanger, especially a diversion baffle structure used in a flooded evaporator, which utilizes a number of diversion ports provided on it, and the maximum diameter width of each diversion port has a specific The proportional relationship can improve the heat exchange efficiency of the evaporator. Background technique [0002] Chillers are mainly used in general indoor central air-conditioning systems, and their types can be divided into centrifugal, spiral, reciprocating, and slide-scroll types, such as the compressor of the refrigeration cycle system. Types can be divided into water-cooled, air-cooled, and evaporative-cooled, etc., but if they are distinguished by the type of evaporator, there are two types: direct expansion type and flooded type. [0003] The configuration of the known flooded ice water machine, as shown in Figure 1, includes a compressor 1 for compressing the low-pressure and low-temperature...

AI Technical Summary

Problems solved by technology

[0005] However, according to actual application, when the liquid refrigerant is introduced into the evaporator 7 through the refrigerant pipeline 9, the pore size of the guide hole 731 on the diverter baffle 73 is small, and because the size of the pore size is closely related to the resistance encountered by the fluid ( The smaller the pore diameter, the greater the resistance), so the liquid refrigerant is limited by the pore diameter of the diversion hole 731 to form resistance to reduce the flow rate, and then the contact area between the introduced refrigerant and the surface of the heating tube 75 in the evaporator 7 is limited, and finally affects its heat exchange. benefit

In addition, please refer to Fig. 2, when the imported refrigerant flows out of the pipe and is connected to the inside of the evaporator 7, it is blocked by the diverter baffle 73, that is to say, there is direct resistance directly in front of the refrigerant flow direction, which promotes The refrigerant diverges to both sides and becomes the main flow field of the fluid. On the other hand, because the diameter of the diversion hole 731 on the diversion baffle 73 is too small, the injected refrigerant has no time to pass through the flow diversion hole 731 and flow more toward the diversion baffle. The two sides of the plate 73 flow, and when it flows to the left and right edges of the evaporator 7, because there is no room for the refrigerant to continue to flow to the left or right, the fluid has to rush forward, and the flow between the diverter baffle 73 and the evaporator 7 The flow velocity at the gap 732 formed by the inner wall of the housing 77 increases, which in turn causes the overall flow velocity of the refrigerant to be uneven, and the flow velocity of the refrigerant closest to the diversion holes 731 on the left and right sides will be the fastest

Simultaneously, because the refrigerant is under the situation of nowhere to channel, it is guided into the heating tube 75 tube group through the gap 732 on both sides at an accelerated rate, and due to the introduction of a large amount of refrigerant, the heating tube 75 tube group forms a soaking phenomenon, so that the refrigerant and the heating tube The heat exchange efficiency generated by the 75 rooms is reduced, and finally seriously affects the cooling effect of the chiller

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