Heat exchangers and air conditioning units

Abstract

Provided are a heat exchanger and an air conditioning device with which it is possible to minimize eccentric flow of a refrigerant, even in cases of use under conditions in which the circulation rate varies. A plurality of flat perforated tubes (21b) are connected at different heights to a first internal space (23a) of a doubled-back header collecting tube (23) of an outdoor heat exchanger (20). In the first internal space (23a) there is adopted a loop structure including a first partition plate (51), first inflow ports (41x), a first upper communicating passage (51x), and a first lower communicating passage (51y). The first partition plate (51) partitions the first internal space (23a) into a first outflow space (51a) and a first loop space (51b). The first inflow ports (41x) are disposed at the bottom of the first outflow space (51 a), so as to cause the refrigerant to ascend within the first outflow space (51 a). Refrigerant that has reached the top end of the first outflow space (51 a) is guided into the first loop space (51b) via the first upper communicating passage (51x), and refrigerant having descended through the first loop space (51b) is returned to the first outflow space (51 a) via the first lower communicating passage (51y), in a direction other than a vertical direction.

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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