JP2016114282A5

JP2016114282A5 -

Info

Publication number: JP2016114282A5
Application number: JP2014252523A
Authority: JP
Filing date: 2014-12-12
Publication date: 2018-01-25
Anticipated expiration: 2034-12-12

Description

本発明の第１観点に係る熱交換器は、冷媒ヘッダと、複数の扁平多穴管とを備えている。冷媒ヘッダには、冷媒入口が形成されている。扁平多穴管は、冷媒ヘッダのヘッダ長手方向と交差する方向に延びている。扁平多穴管には、ヘッダから冷媒が流れ込む。冷媒ヘッダの内部空間は、ヘッダ長手方向に延びる仕切り板によって、冷媒入口の側の第１室と、第１室とは別の第２室とに仕切られている。そして、冷媒入口から第１室に入った冷媒の少なくとも一部は、第１室から第２室に流れ、再び第２室から第１室に戻る。 The heat exchanger according to the first aspect of the present invention includes a refrigerant header and a plurality of flat multi-hole tubes. A refrigerant inlet is formed in the refrigerant header. The flat multi-hole tube extends in a direction crossing the header longitudinal direction of the refrigerant header . The refrigerant flows into the flat multi-hole tube from the header. The internal space of the refrigerant header is partitioned into a first chamber on the refrigerant inlet side and a second chamber different from the first chamber by a partition plate extending in the header longitudinal direction. Then, at least a part of the refrigerant that has entered the first chamber from the refrigerant inlet flows from the first chamber to the second chamber and returns again from the second chamber to the first chamber.

ここでは、冷媒入口から冷媒ヘッダの内部空間に入った冷媒が、複数の扁平多穴管の各穴に流れ、扁平多穴管の外部を流れる流体と熱交換を行う。ここで、冷媒が気相および液相が混じる二相状態であった場合、仮に仕切り板がなければ、その内部空間において、冷媒入口に近いところの冷媒が主として液相となり冷媒入口から遠いところの冷媒が主として気相となる状況が生じる。その状況になると、液相の冷媒が多く流れる扁平多穴管と、気相の冷媒が多く流れる扁平多穴管とに分かれてしまい、冷媒の偏流が生じる。
Here, the refrigerant that has entered the internal space of the refrigerant header from the refrigerant inlet flows into each hole of the plurality of flat multi-hole tubes, and performs heat exchange with the fluid flowing outside the flat multi-hole tubes. Here, when the refrigerant is in a two-phase state in which the gas phase and the liquid phase are mixed , if there is no partition plate, the refrigerant near the refrigerant inlet in the internal space mainly becomes the liquid phase and is far from the refrigerant inlet. A situation occurs in which the refrigerant is mainly in the gas phase. In such a situation, the multi-hole tube is divided into a flat multi-hole tube through which a large amount of liquid-phase refrigerant flows, and a flat multi-hole tube through which a large amount of gas-phase refrigerant flows.

本発明の第４観点に係る熱交換器は、第１〜第３観点のいずれかに係る熱交換器であって、仕切り板は、冷媒ヘッダの内部空間を第１室、第２室に仕切っている。そして、冷媒ヘッダの内部空間の冷媒は、第１室から扁平多穴管の複数の穴の一部の穴に流れ込み、第２室から扁平多穴管の複数の穴の残りの穴に流れ込む。
A heat exchanger according to a fourth aspect of the present invention is the heat exchanger according to any one of the first to third aspects, wherein the partition plate partitions the internal space of the refrigerant header into a first chamber and a second chamber. ing. And the refrigerant | coolant of the internal space of a refrigerant | coolant header flows into a part of several holes of a flat multi-hole tube from a 1st chamber, and flows into the remaining holes of a plurality of holes of a flat multi-hole tube from a 2nd chamber.

ここでは、仕切り板が冷媒ヘッダの内部空間を第１室、第２室に仕切っている。そして、扁平多穴管の穴が、第１室にも第２室にも露出しており、冷媒入口の側の第１室からだけではなく、第２室からも扁平多穴管の穴に冷媒が流れ込む。このような構成を採っているため、多くの冷媒が第１室から第２室に流れ、その冷媒の一部が第２室から再び第１室に戻る。これにより、自然と冷媒ヘッダの内部空間における冷媒循環量が多くなり、冷媒の偏流も更に抑制される。
Here, the partition plate partitions the internal space of the refrigerant header into a first chamber and a second chamber . The holes of the flat multi-hole tube are exposed in both the first chamber and the second chamber, and not only from the first chamber on the refrigerant inlet side, but also from the second chamber to the hole of the flat multi-hole tube. Refrigerant flows. Since such a configuration is adopted, a large amount of refrigerant flows from the first chamber to the second chamber, and a part of the refrigerant returns from the second chamber to the first chamber again. As a result, the amount of refrigerant circulating in the internal space of the refrigerant header naturally increases, and the refrigerant drift is further suppressed.

また、第４観点に係る熱交換器では、冷媒ヘッダの内部空間の冷媒入口に近い側と冷媒入口から遠い側との冷媒の偏流、すなわち、冷媒ヘッダの長手方向の冷媒偏流が抑制されることに加えて、仕切り板が冷媒ヘッダの内部空間を第１室、第２室に仕切っているため、冷媒ヘッダの内部空間の第１室、第２室の冷媒の偏りも抑制することができる。
Moreover, in the heat exchanger which concerns on a 4th viewpoint, the drift of the refrigerant | coolant of the side near the refrigerant | coolant inlet of the internal space of a refrigerant | coolant header and the side far from a refrigerant | coolant inlet, ie, the refrigerant | coolant drift of the longitudinal direction of a refrigerant | coolant header is suppressed. In addition, since the partition plate partitions the internal space of the refrigerant header into the first chamber and the second chamber, it is possible to suppress the bias of the refrigerant in the first chamber and the second chamber of the internal space of the refrigerant header.

本発明の第４観点に係る熱交換器によれば、冷媒ヘッダの長手方向の冷媒偏流が抑制されることに加えて、仕切り板が冷媒ヘッダの内部空間を第１室、第２室に、仕切っているため、冷媒ヘッダの内部空間の第１室、第２室の冷媒の偏りも抑制することができる。 According to the heat exchanger according to the fourth aspect of the present invention, in addition to suppressing the refrigerant drift in the longitudinal direction of the refrigerant header, the partition plate divides the internal space of the refrigerant header into the first chamber and the second chamber, Since it partitions , the bias of the refrigerant | coolant of the 1st chamber of the internal space of a refrigerant | coolant header and a 2nd chamber can also be suppressed.

Claims

Refrigerant inlet (EN1, EN101) refrigerant is formed a header and (51, 151),
A plurality of flat multi-hole tubes (40, 140) extending in a direction intersecting with the longitudinal direction of the header of the refrigerant header, and into which refrigerant flows from the refrigerant header;
With
The internal space (IS10, IS110) of the refrigerant header is separated from the first chamber (IS11, IS111) on the refrigerant inlet side and the first chamber by partition plates (69, 169) extending in the header longitudinal direction. It is divided into another second room (IS12, IS112),
At least part of the refrigerant that has entered the first chamber from the refrigerant inlet flows from the first chamber to the second chamber, and returns from the second chamber to the first chamber again.
Heat exchanger (10).

In the internal space of the refrigerant header, a first opening (PA1, PA101) for flowing the refrigerant from the first chamber to the second chamber is provided at an end opposite to the refrigerant inlet side in the header longitudinal direction. A second opening (PA2, PA102) for returning the refrigerant from the second chamber to the first chamber is formed at an end of the header longitudinal direction on the side of the refrigerant inlet.
The heat exchanger according to claim 1.

The refrigerant inlet is a nozzle with a reduced flow path area,
The second opening is formed in the vicinity of the refrigerant inlet,
Due to the jet of refrigerant flowing into the internal space of the refrigerant header from the refrigerant inlet, the vicinity of the refrigerant inlet is in a low pressure state and returns from the second chamber to the first chamber through the second opening. Refrigerant flow occurs,
The heat exchanger according to claim 2.

Some holes of the plurality of flat multi-hole tubes (40) are connected to the first chamber (IS11), and the remaining holes of the plurality of flat multi-hole tubes (40) The hole is connected to the second chamber (IS12),
The refrigerant in the internal space of the refrigerant header flows from the first chamber into the partial hole of the flat multi-hole tube, and flows from the second chamber into the remaining hole of the flat multi-hole tube.
The heat exchanger according to any one of claims 1 to 3.

The partition plate (169) includes an internal space (IS10) of the refrigerant header, the first chamber (IS111) in which a plurality of holes of the flat multi-hole tube (140) are not exposed, and a plurality of flat multi-hole tubes. And is partitioned into the second chamber (IS112) where the hole is exposed,
The refrigerant in the internal space of the refrigerant header flows into the plurality of holes of the flat multi-hole tube from the second chamber,
The heat exchanger according to any one of claims 1 to 3.

The refrigerant that returns from the second chamber (IS112) to the first chamber (IS111) returns to the first chamber from the vicinity of the bottom surface of the second chamber.
The heat exchanger according to claim 5.

The heat exchanger according to any one of claims 1 to 6, wherein a hole through which the refrigerant of the flat multi-hole tube flows extends in a horizontal direction.

The heat exchanger according to any one of claims 1 to 7, wherein the plurality of holes of the flat multi-hole tube are arranged along a direction intersecting a header longitudinal direction of the refrigerant header.

The heat exchanger according to any one of claims 1 to 8, wherein the plurality of holes of the flat multi-hole tube are arranged along a vertical direction.

The refrigerant header (51) is a header to which a refrigerant inlet pipe (57) is connected,
A folded refrigerant header (52) separate from the refrigerant header (51),
Further comprising
Refrigerant flows into the internal space (IS10) of the refrigerant header (51) from the inlet pipe (57),
The internal space of the folded refrigerant header (52) includes a refrigerant inflow side internal space (IS30) to which the flat multi-hole tube (40) on the refrigerant inflow side is connected, and the flat multi-hole tube (40) on the refrigerant outflow side. Is divided into the refrigerant outflow side internal space (IS40) to which
The refrigerant outflow side internal space (IS40) is separated from the third chamber (IS43) on the refrigerant inflow side internal space (IS30) side and the third chamber by a partition plate (69b) extending in the header longitudinal direction. The fourth room (IS44)
At least part of the refrigerant that has entered the third chamber from the refrigerant inflow side internal space (IS30) flows from the third chamber to the fourth chamber, and returns from the fourth chamber to the third chamber again.
The heat exchanger according to any one of claims 1 to 9 .