Heat exchanger and air conditioning device

By setting up multi-layer plates and pipe connection structures within the plate structure, the refrigerant flow rate and flow path are controlled, solving the problem of refrigerant pressure loss in the stacked manifold, and realizing efficient refrigerant flow and system miniaturization.

CN122459638APending Publication Date: 2026-07-24DAIKIN INDUSTRIES LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DAIKIN INDUSTRIES LTD
Filing Date
2024-10-08
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

In existing technologies, the pressure loss caused by friction and collision with the wall surface when the refrigerant flows in a stacked manifold is significant and difficult to reduce effectively.

Method used

By setting first and second refrigerant flow paths within the plate structure, connecting the heat transfer tubes to the plate structure via pipes, controlling the refrigerant flow rate, reducing collisions with the wall surface, employing chamfered or rounded corner designs to smooth the flow, and controlling the pipe spacing to avoid interference.

Benefits of technology

This effectively reduces refrigerant pressure loss within the plate structure, achieves efficient refrigerant flow, and reduces system energy consumption and size.

✦ Generated by Eureka AI based on patent content.

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Abstract

A heat exchanger includes a heat exchange portion (40A, 40B) having fins (41) and heat transfer tubes (42) in which first refrigerant flow paths (42A) are formed inside, and a plate structure (50, 60) connected directly or indirectly to the heat transfer tubes (42) and in which second refrigerant flow paths (51) are formed inside, the second refrigerant flow paths (51) including first flow path portions (71) communicating with the outside of the plate structure (50, 60), and a pipe (80, 42B) connecting the first refrigerant flow paths (42A) and the second refrigerant flow paths (51) includes a first portion (81, 421) connected to the first flow path portions (71), and a second portion (82, 422) connected to the first portion (81, 421) and having a flow path area smaller than that of the first portion (81, 421).
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