a heat exchanger
A technology of heat exchangers and heat exchange tubes, applied in lighting and heating equipment, evaporators/condensers, refrigerators, etc. problem, to achieve uniform heat transfer, improve heat transfer efficiency, and simple structure
Active Publication Date: 2019-05-07
DANFOSS MICRO CHANNEL HEAT EXCHANGER JIAXING
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Problems solved by technology
[0003] However, in the actual use of heat exchangers such as microchannel heat exchangers, their heat exchange efficiency is not as high as expected, and the heat exchange efficiency is not particularly ideal.
Those skilled in the art have also studied the unsatisfactory heat transfer efficiency from the aspects of welding process and manufacturing technology by dissecting the heat exchanger and other means, but still have not found a solution to effectively improve the actual heat transfer efficiency of the heat exchanger. Program
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Embodiment Construction
[0044] Aiming at the problem of unsatisfactory heat exchange efficiency of the heat exchanger, the inventor has conducted a large number of experiments and researches, and finally found the real reason leading to the above problems. The inventors found through research that, such as micro-channel heat exchangers, the micro-channels have high requirements on the state of the refrigerant passing through it due to their small size, especially when the refrigerant is in a gas-liquid two-phase state or liquid state, it is easy to be blocked. As a result, the heat exchange at each position of the condenser is uneven, which ultimately reduces the heat exchange efficiency. Specifically, in a vertically placed microchannel condenser, when the inlet of the condenser is at the lower end of the condenser, part of the microchannel flat tubes between the upper and lower headers of the condenser will be absorbed by the refrigerant liquid Blockage, resulting in the failure of this part of the...
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The invention provides a heat exchanger. The heat exchanger comprises an inlet pipe, an outlet pipe, an upper collecting pipe, a lower collecting pipe and a heat exchange part, wherein a refrigerant in the heat exchanger is discharged through the outlet pipe; a separating plate is arranged in the upper collecting pipe and divides the upper collecting pipe into at least one first chamber and at least one second chamber; at least one opening is formed in the separating plate; the first chamber and the second chamber communicate by liquid through the opening; the lower collecting pipe communicates with the inlet pipe by the liquid; the heat exchange part, comprising a plurality of heat exchange pipes and fins positioned among the adjacent heat exchange pipes, is positioned between the upper collecting pipe and the lower collecting pipe; the heat exchange pipes communicate with the second chamber of the upper collecting pipe and the lower collecting pipe by the liquid; the separating plate is provided with one or a plurality of stopping parts which can stop liquid flowing from the first chamber into the second chamber through one or a plurality of openings of the at least one opening.
Description
technical field [0001] The present application relates to a heat exchanger, and in particular to a condenser for refrigeration and air conditioning. Background technique [0002] In the field of refrigeration and air conditioning, the condenser is one of the core components in the refrigeration process to complete the refrigeration cycle. For example, microchannel heat exchangers are widely used in the field of refrigeration and air conditioning due to their large contact area with the environment and high heat exchange efficiency. [0003] However, in the actual use of heat exchangers such as microchannel heat exchangers, the heat exchange efficiency is not as high as expected, and the heat exchange efficiency is not particularly ideal. Those skilled in the art have also studied the unsatisfactory heat transfer efficiency from the aspects of welding process and manufacturing technology by dissecting the heat exchanger and other means, but still have not found a solution to...
Claims
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IPC IPC(8): F25B39/04
Inventor 刘玉宝沈继红陆向迅徐阳
Owner DANFOSS MICRO CHANNEL HEAT EXCHANGER JIAXING