Heat exchanger

Patent metadata

Field	Value
Publication number	US-9989317-B2
Application number	US-201314655471-A
Country	US
Kind code	B2
Filing date	Dec 5, 2013
Priority date	Dec 27, 2012
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

In a heat exchanger, an outside air passage, through which outside air flows, is provided between adjacent tubes of the refrigerant tube and the coolant tubes. Disposed in the outside air passage is an outer fin joined to at least one of the refrigerant tube and the coolant tube and configured to accelerate heat transfer between the fluids. A dimension of the refrigerant tube in a flow direction of the outside air is different from a dimension of the coolant tube in the flow direction of the outside air. Hence, with respect to the outer fin joined to both of the refrigerant tube and the coolant tube, an area of a joint surface between the refrigerant tube and the outer fin is different from an area of a joint surface between the coolant tube and the outer fin.

First claim

What is claimed is:

1. A heat exchanger comprising:
a heat exchanging unit including first tubes, in which a first fluid flows, second tubes, in which a second fluid flows, or both the first tubes and the second tubes, which are arranged in a stacked manner, the heat exchanging unit allowing at least one of the first fluid and the second fluid to exchange heat with a third fluid;
third fluid passages each of which is a space provided between adjacent tubes of the tubes of the heat exchanging unit, the third fluid flowing through the third fluid passages;
outer fins that are disposed in the third fluid passages and joined to at least one of outer surfaces of the first tubes and outer surfaces of the second tubes, the outer fins accelerating heat transfer between the fluids; and
protruding portions which protrude downstream in the flow direction of the third fluid from downstream ends of the second tubes, wherein
at least one of the outer fins is joined to both of the first tubes and the second tubes,
an area of a joint surface between the first tubes and the at least one of the outer fins is different from an area of a joint surface between the second tubes and the at least one of the outer fins,
a length of the first tubes joined to the at least one of the outer fins in a flow direction of the third fluid is different from a length of the second tubes joined to the at least one of the outer fins in the flow direction of the third fluid, and
downstream ends of the first tubes and downstream ends of the protruding portions are located at a same position in the flow direction of the third fluid.

2. A heat exchanger comprising:
a heat exchanging unit including first tubes, in which a first fluid flows, second tubes, in which a second fluid flows, or both the first tubes and the second tubes, which are arranged in a stacked manner, the heat exchanging unit allowing at least one of the first fluid and the second fluid to exchange heat with a third fluid;
third fluid passages each of which is a space provided between adjacent tubes of the tubes of the heat exchanging unit, the third fluid flowing through the third fluid passages;
outer fins that are disposed in the third fluid passages and joined to at least one of outer surfaces of the first tubes and outer surfaces of the second tubes, the outer fins accelerating heat transfer between the fluids; and
protruding portions which protrude downstream in the flow direction of the third fluid from downstream ends of the second tubes, wherein
at least one of the outer fins is joined to both of the first tubes and the second tubes,
an area of a joint surface between the first tubes and the at least one of the outer fins is different from an area of a joint surface between the second tubes and the at least one of the outer fins,
a number of the first tubes joined to the at least one of the outer fins and arranged in a flow direction of the third fluid is different from a number of the second tubes joined to the at least one of the outer fins and arranged in the flow direction of the third fluid, and
downstream ends of the first tubes and downstream ends of the protruding portions are located at a same position in the flow direction of the third fluid.

3. The heat exchanger according to claim 1 , wherein a thickness of the first tube in a direction vertical to the flow direction of the third fluid is different from a thickness of the second tube in a direction vertical to the flow direction of the third fluid.

4. A heat exchanger comprising:
a heat exchanging unit including first tubes, in which a first fluid flows, second tubes, in which a second fluid flows, or both the first tubes and the second tubes, which are arranged in a stacked manner, the heat exchanging unit allowing at least one of the first fluid and the second fluid to exchange heat with a third fluid;
third fluid passages each of which is a space provided between adjacent tubes of the tubes of the heat exchanging unit, the third fluid flowing through the third fluid passages;
outer fins that are disposed in the third fluid passages and joined to at least one of outer surfaces of the first tubes and outer surfaces of the second tubes, the outer fins accelerating heat transfer between the fluids;
a first fluid tank unit extending in a stacking direction of the first tubes and including a first fluid space in or from which the first fluid flowing in the first tubes is collected or distributed; and
a second fluid tank unit extending in a stacking direction of the second tubes and including a second fluid space in or from which the second fluid flowing in the second tubes is collected or distributed, wherein
the first fluid tank unit and the second fluid tank unit include:
a header plate to which both of the first tubes and the second tubes are fixed;
a first intermediate plate member and a second intermediate plate member which are fixed to the header plate; and
a tank forming member fixed to the header plate and the second intermediate plate member and having the first fluid space and the second fluid space,
the header plate includes a first fluid through hole through which the first fluid flows, and a second fluid through hole through which the second fluid flows,
the first intermediate plate member includes a first fluid through hole through which the first fluid flows, and a second fluid through hole through which the second fluid flows,
the second intermediate plate member includes a first fluid through hole through which the first fluid flows, and a second fluid through hole through which the second fluid flows,
the first tubes and the first fluid space of the first fluid tank unit communicate with each other through the first fluid through holes of the header plate, the first intermediate plate member and the second intermediate plate member,
the second tubes and the second fluid space of the second fluid tank unit communicate with each other through the second fluid through holes of the header plate, the first intermediate plate member and the second intermediate plate member,
the first tubes and the second tubes are arranged without overlapping each other in the flow direction of the third fluid,
two of the header plate, the first intermediate plate member, and the second intermediate plate member are joined to each other,
at least one of plate surfaces of the two joined to each other includes a plate-side groove portion extending in the flow direction of the third fluid, and
an in-groove space provided in the plate-side groove portion continuously extends from between the first fluid through hole and the second fluid through hole adjacent to each other to outside the first fluid tank unit and the second fluid tank unit,
at least one of the outer fins is joined to both of the first tubes and the second tubes,
an area of a joint surface between the first tubes and the at least one of the outer fins is different from an area of a joint surface between the second tubes and the at least one of the outer fins, and
a length of the first tubes joined to the at least one of the outer fins in a flow direction of the third fluid is different from a length of the second tubes joined to the at least one of the outer fins in the flow direction of the third fluid.

5. The heat exchanger according to claim 4 , wherein
a joint surface between the second intermediate plate member and the tank forming member includes a tank-side groove portion extending in a stacking direction of the first tubes and the second tubes, and
an in-groove space provided in the tank-side groove portion continuously extends from between the first fluid space and the second fluid space adjacent to each other to outside the first fluid tank unit and the second fluid tank unit.

6. The heat excha

Assignees

• Denso Corp

Inventors

• Katoh Yoshiki

Classifications

• B60H1/00335

  of the gas-air type (B60H1/18 takes precedence) · CPC title

• F28F2215/06

  Hollow fins; fins with internal circuits · CPC title

• F28F1/126

  consisting of zig-zag shaped fins (F28F1/105 takes precedence) · CPC title

• F28F9/0278

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

• B60H1/00328 Primary

  of the liquid-air type · CPC title