| 摘要 |
In a heat exchanger, a plate member of a tank portion includes a first fluid communication passage through which a first tank space communicates with first tubes, and a second fluid communication passage through which a second tank space communicates with second tubes. Either an upstream first tube group of the first tubes or a downstream first tube group of the first tubes, whichever is larger in a pressure loss of the first fluid, configures a higher pressure loss first tube group, and the other first tube group smaller in the pressure loss of the first fluid configures a lower pressure loss first tube group. A flow channel resistance between the higher pressure loss first tube group and the first tank space is smaller than a flow channel resistance between the lower pressure loss first tube group and the first tank space. |
| 主权项 |
1. A heat exchanger, comprising:
a heat exchange portion in which first tubes through which a first fluid flows and second tubes through which a second fluid flows are stacked, the heat exchange portion performing heat exchange among the first fluid, the second fluid and a third fluid; a tank portion including a first tank space that communicates with the first tubes to collect the first fluid from the first tubes or distribute the first fluid to the first tubes, and a second tank space that communicates with the second tubes to collect the second fluid from the second tubes or distribute the second fluid to the second tubes; a third fluid passage formed between adjacent tubes of the first tubes and the second tubes the third fluid flowing through the third fluid passage; and an outer fin arranged in the third fluid passage, the outer fin facilitating heat exchange between the first fluid and the third fluid and heat exchange between the second fluid and the third fluid and enabling heat transfer between the first fluid flowing in the first tubes and the second fluid flowing in the second tubes, wherein the heat exchange portion includes an upstream heat exchange portion, and a downstream heat exchange portion arranged downstream of the upstream heat exchange portion in a flow direction of the third fluid, the first tubes are arranged in both the upstream heat exchange portion and the downstream heat exchange portion, the second tubes are arranged in at least one of the upstream heat exchange portion or the downstream heat exchange portion, one of the first tubes of the upstream heat exchange portion overlaps with one of the first tubes of the downstream heat exchange portion in the flow direction of the third fluid, and another of the first tubes of the upstream heat exchange portion overlaps with one of the second tubes of the downstream heat exchange portion in the flow direction of the third fluid, the tank portion includes a plate member arranged to close the first tank space and the second tank space from a side of the first and second tubes, the plate member is provided with a first fluid communication passage as a through-hole through which the first tank space communicates with the first tubes, and a second fluid communication passage as a through-hole through which the second tank space communicates with the second tubes, the first tubes in the upstream heat exchange portion configures an upstream first tube group, and the first tubes in the downstream heat exchange portion configures a downstream first tube group, either the upstream first tube group or the downstream first tube group, whichever is larger in pressure loss of the first fluid, configures a higher pressure loss first tube group, either the upstream first tube group or the downstream first tube group, whichever is smaller in pressure loss of the first fluid, configures a lower pressure loss first tube group, and a flow channel resistance between the higher pressure loss first tube group and the first tank space is smaller than a flow channel resistance between the lower pressure loss first tube group and the first tank space. |
