Vehicle interior heat exchanger and inter-header connecting member of vehicle interior heat exchanger

Patent metadata

Field	Value
Publication number	US-9797656-B2
Application number	US-201314386901-A
Country	US
Kind code	B2
Filing date	Feb 21, 2013
Priority date	Mar 27, 2012
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

Cooling performance is secured by reducing a compression loss when a high-pressure gas refrigerant is allowed to flow without heat exchange on cooling in a vehicle interior heat exchanger. In the vehicle interior heat exchanger, an upstream header and a downstream header are communicated and connected with the same end side of the refrigerant circulation tubes of an upstream tube group and a downstream tube group where the refrigerant circulation tubes are stacked. Internal spaces of the upstream header and the downstream header are communicated and connected with each other via communication holes in the boss portions of the connecting member. In the vehicle interior heat exchanger, the total opening area of the communication holes is set such that the percentage thereof, with respect to the total opening area of the channel on the uppermost stream side of the upstream tube group, is in the range of 38% to 93%.

First claim

The invention claimed is:

1. A vehicle interior heat exchanger of a vehicular air conditioner, the vehicle interior heat exchanger comprising:
an upstream tube group and a downstream tube group, the tube groups each having a plurality of stacked refrigerant circulation tubes and being aligned in an air-blowing direction of a vehicle interior air-blowing path; and
a pair of headers communicated and connected with a same end side of the refrigerant circulation tubes of the respective tube groups, in which at least portions of internal spaces of the pair of headers are connected with each other in a communicating manner via a communication hole, wherein
a total cross-sectional area of the communication hole allowing the internal spaces to communicate with each other is set such that a percentage of the total cross-sectional area of the communication hole, with respect to a total cross-sectional area of a channel on an uppermost stream side of the upstream tube group, is in a range of 38% to 65%,
wherein a plurality of boss portions formed on a connecting member so as to protrude from both sides of a flat plane of the connecting member, the boss portions penetrating through and being connected with pipe walls of the pair of headers, wherein the boss portions can be formed by a pair of plate members, each of which formed by burring so as to protrude from the surface of one side, superimposed in opposite directions, and fixed by brazing,
wherein the headers communicate with each other via a plurality of communication holes formed inside the boss portions, and
wherein an outer diameter of each of the boss portions is smaller than an interval between the refrigerant circulation tubes adjacent to each other, and the boss portion is disposed between the refrigerant circulation tubes.

2. The vehicle interior heat exchanger according to claim 1 , wherein the vehicle interior heat exchanger functions as a condenser on heating, and
when cooling, air blown in the air-blowing path is blocked, and the vehicle interior heat exchanger allows a refrigerant from a compressor to flow in a gas state and supplies the refrigerant to a condenser outside the vehicle interior.

3. The vehicle interior heat exchanger according to claim 1 , wherein
a total cross-sectional area of respective refrigerant circulation tubes at an upstream end of the upstream tube group is larger than a cross-sectional area of an inlet pipe to be connected with an inlet portion of a header connected with the upstream end of the upstream tube group.

Assignees

• Sanden Corp
• Sanden Holdings Corp

Inventors

• Matsumoto Yuuichi
• Iino Yusuke

Classifications

• F28F9/026

  with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits · CPC title

• F28F9/02

  Header boxes; End plates · CPC title

• F28D1/0417 Primary

  with particular circuits for the same heat exchange medium, e.g. with the heat exchange medium flowing through sections having different heat exchange capacities or for heating/cooling the heat exchange medium at different temperatures · CPC title

• F28F9/0278

  in the form of stacked distribution plates or perforated plates arranged over end plates · CPC title

• F28F9/0226

  with resilient gaskets · CPC title