Heat exchanger

Patent metadata

Field	Value
Publication number	US-2022155021-A1
Application number	US-202217592624-A
Country	US
Kind code	A1
Filing date	Feb 4, 2022
Priority date	Aug 8, 2019
Publication date	May 19, 2022
Grant date	—

Abstract

A heat exchanger is formed by stacking plates with each other. The heat exchanger includes a refrigerant receiving tank configured to receive a refrigerant, a refrigerant discharging tank configured to discharge the refrigerant that has heat-exchanged, and refrigerant passages in which heat exchange between the refrigerant and another fluid is performed. The refrigerant passages fluidly connect between the refrigerant receiving tank and the refrigerant discharging tank. The refrigerant receiving tank includes a swirl structure configured to generate a swirling component in a flow of the refrigerant in the refrigerant receiving tank.

First claim

What is claimed is:

1 . A heat exchanger formed by stacking a plurality of plates with each other, the heat exchanger comprising:
a refrigerant receiving tank configured to receive a refrigerant; a refrigerant discharging tank configured to discharge the refrigerant that has heat-exchanged; and a plurality of refrigerant passages in which heat exchange between the refrigerant and another fluid is performed, the plurality of refrigerant passages fluidly connecting between the refrigerant receiving tank and the refrigerant discharging tank, wherein the refrigerant receiving tank includes a swirl structure configured to generate a swirling component in a flow of the refrigerant in the refrigerant receiving tank, the swirl structure includes a vane, D is defined as a distance between adjacent ones of the plurality of refrigerant passages, d is defined as a width of an inlet of each of the plurality of refrigerant passages, θ is defined as an angle of the vane of the swirl structure, x is defined as a ratio of an area of the vane to a cross-sectional area of the refrigerant receiving tank, and
0 <d·x ·cos θ/ D <0.6.

2 . The heat exchanger according to claim 1 , wherein
0.02 <d·x ·cos θ/ D <0.5.

3 . The heat exchanger according to claim 1 , wherein
the swirl structure is integrally formed with at least one of the plurality of plates.

4 . The heat exchanger according to claim 1 , wherein
the refrigerant receiving tank defines an inlet opening through which the refrigerant flows into the refrigerant receiving tank, and the swirl structure is disposed in a vicinity of the inlet opening of the refrigerant receiving tank.

5 . The heat exchanger according to claim 1 , wherein
the refrigerant flows into the refrigerant receiving tank in an inflow direction, and a length of the refrigerant receiving tank along the inflow direction is set to be less than 100 mm.

6 . The heat exchanger according to claim 1 , wherein
the swirl structure includes a main shaft and a vane connected to the main shaft, and the vane is tilted at a constant angle relative to the main shaft.

7 . The heat exchanger according to claim 1 , wherein
the swirl structure is separately formed from the refrigerant receiving tank.

Assignees

• Denso Corp

Inventors

• Kikuchi Kengo
• Muramatsu Kenshiro
• Takagi Yusuke
• Nita Satoshi

Classifications

• F28F13/12

  by creating turbulence, e.g. by stirring, by increasing the force of circulation (F28F13/08 takes precedence) · CPC title

• F28F9/0282

  by varying the geometry of conduit ends, e.g. by using inserts or attachments for modifying the pattern of flow at the conduit inlet or outlet · CPC title

• F28F9/0268

  in the form of multiple deflectors for channeling the heat exchange medium · CPC title

• F28F9/0265

  by using guiding means or impingement means inside the header box · CPC title

• F28F13/125

  by stirring · CPC title