Heat exchanger and air conditioner

Abstract

Provided are a heat exchanger and an air conditioner capable of inhibiting uneven flow of refrigerant even when used under conditions when the circulation flow changes. A plurality of flat perforated pipes (21b) are connected at different heights to a first inner space (23a) of a return header collecting pipe (23) of an outdoor heat exchanger (20). The first inner space (23a) uses a loop structure that includes a first partitioning plate (51), a first inlet (41x), a first upper communicating route (51x), and a first lower communicating route (51y). The first partitioning plate (51) partitions the first inner space (23a) into a first outflow space (51a) and a first loop space (51b). The first inlet (41x) is provided at the bottom of the first outflow space (51a) so that the refrigerant rises in the first outflow space (51a). Refrigerant that reaches the upper end of the first outflow space (51a) is guided to the first loop space (51b) via the first upper communicating route (51x), and the refrigerant that drops from the first loop space (51b) is returned to the first outflow space (51a) in a non-vertical direction via the first lower communicating route (51y).

Description

technical field [0001] The invention relates to a heat exchanger and an air conditioner. Background technique [0002] Conventionally, there is known a heat exchanger which has a plurality of flat tubes, fins joined to the plurality of flat tubes, header headers respectively connected to one end side and the other end side of the plurality of flat tubes, And the heat exchanger exchanges heat between the refrigerant flowing inside the flat tubes and the air flowing outside the flat tubes. [0003] For example, in the heat exchanger described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2-219966), the following structure is adopted: both ends of a plurality of outflow pipes extending in the horizontal direction are respectively connected to collectors extending in the vertical direction. Tube manifold. [0004] In the heat exchanger described in this patent document 1, there is the following technical problem: in the inside of the header tubes extending in...

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Problems solved by technology

[0004] In the heat exchanger described in this patent document 1, there is the following technical problem: in the inside of the header tubes extending in the vertical direction, since the liquid-phase refrigerant with a large specific gravity gathers below and the gas-phase refrigerant with a small specific gravity gathers above, thus creating a bias current

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