Refrigerant evaporator

Patent metadata

Field	Value
Publication number	US-10168084-B2
Application number	US-201414889505-A
Country	US
Kind code	B2
Filing date	May 9, 2014
Priority date	May 10, 2013
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

A refrigerant evaporator has an interchange part. The interchange part connects a first collecting part of a second downstream tank part, and a second distribution part of a second upstream tank part. The interchange part connects a second collecting part of a second downstream tank part, and a first distribution part of a second upstream tank part. The interchange part swaps a refrigerant about a width direction of a core. Refrigerant passages relevant to the interchange part are configured to improve refrigerant distribution. Providing a plurality of passages and/or twisting a passage improve distribution.

First claim

What is claimed is:

1. A refrigerant evaporator for performing heat exchange between fluid to be cooled flowing through an outside and refrigerant, comprising:
a first evaporating portion and a second evaporating portion arranged in series to a flow direction of the fluid to be cooled, wherein
the first evaporating portion and the second evaporating portion each respectively including:
a core part for heat exchange formed by stacking a plurality of tubes in which a refrigerant flows; and
a pair of tank parts which are connected with both ends of the plurality of tubes, and perform collecting and distribution of the refrigerant flowing through the plurality of tubes, and wherein
the core part in the first evaporating portion has a first core part configured by a group of some tubes among the plurality of tubes of the first evaporating portion core part, and a second core part configured by a group of remaining tubes of the first evaporating portion core part, and wherein
the core part in the second evaporating portion has a third core part configured by a group of tubes of the second evaporating portion core part opposing at least a part of the first core part in flow direction of the fluid to be cooled, and a fourth core part configured by a group of remaining tubes of the second evaporating portion core part opposing at least a part of the second core part in a flow direction of the fluid to be cooled, and wherein
one tank part among the pair of tank parts in the first evaporating portion is configured to include a first collecting part which collects the refrigerant from the first core part, and a second collecting part which collects the refrigerant from the second core part, and wherein
one tank part among the pair of tank parts in the second evaporating portion is configured to include a first distribution part which distributes the refrigerant to the third core part, and a second distribution part which distributes the refrigerant to the fourth core part, and wherein
the first evaporating portion and the second evaporating portion are connected through a refrigerant inter change part having a first communicating portion which leads the refrigerant in the first collecting part to the second distribution part and a second communicating portion which leads the refrigerant in the second collecting part to the first distribution part, and wherein
the first distribution part is connected with the second communicating portion and is disposed with a refrigerant inlet which makes the refrigerant from the second collecting part flow into the first distribution part, and wherein
the second collecting part is connected with the second communicating portion and is disposed with a refrigerant outlet which makes the refrigerant in the second collecting part flow out to the first distribution part, and wherein
the refrigerant outlet and the refrigerant inlet are formed in different numbers, and wherein
the refrigerant inlet is disposed as a plurality of inlets, and wherein
all of the refrigerant inlets are arranged on one side to a center line in a stacking direction of the tubes in the first distribution part, and further comprising:
a flow amount adjustor disposed on the other side to the center line in the first distribution part, which adjusts a refrigerant amount flowing through the inside of the first distribution part.

2. The refrigerant evaporator according to claim 1 , wherein
the second communicating portion is disposed as a plurality of passages, and each of which is connected to the refrigerant inlets, respectively.

3. The refrigerant evaporator according to claim 1 , wherein
the number of the refrigerant inlets is more than the number of the refrigerant outlet.

4. The refrigerant evaporator according to claim 3 , wherein
the number of the refrigerant outlet is one.

5. A refrigerant evaporator for performing heat exchange between fluid to be cooled flowing through an outside and refrigerant, comprising:
a first evaporating portion and a second evaporating portion arranged in series to a flow direction of the fluid to be cooled, wherein
the first evaporating portion and the second evaporating portion each respectively including:
a core part for heat exchange formed by stacking a plurality of tubes in which a refrigerant flows; and
a pair of tank parts which are connected with both ends of the plurality of tubes, and perform collecting and distribution of the refrigerant flowing through the plurality of tubes, and wherein
the core part in the first evaporating portion has a first core part configured by a group of some tubes among the plurality of tubes of the first evaporating portion core part, and a second core part configured by a group of remaining tubes of the first evaporating portion core part, and wherein
the core part in the second evaporating portion has a third core part configured by a group of tubes of the second evaporating portion core part opposing at least a part of the first core part in a flow direction of the fluid to be cooled, and a fourth core part configured by a group of remaining tubes of the second evaporating portion core part opposing at least a part of the second core part in a flow direction of the fluid to be cooled, and wherein
one tank part among the pair of tank parts in the first evaporating portion is configured to include a first collecting part which collects the refrigerant from the first core part, and a second collecting part which collects the refrigerant from the second core part, and wherein
one tank part among the pair of tank parts in the second evaporating portion is configured to include a first distribution part which distributes the refrigerant to the third core part, and a second distribution part which distributes the refrigerant to the fourth core part, and wherein
the first evaporating portion and the second evaporating portion are connected through a refrigerant inter change part having a first communicating portion which leads the refrigerant in the first collecting part to the second distribution part and a second communicating portion which leads the refrigerant in the second collecting part to the first distribution part, and wherein
the first distribution part is connected with the second communicating portion and is disposed with a plurality of refrigerant inlets which makes the refrigerant from the second collecting part flow into the first distribution part, and wherein
all of the refrigerant inlets are arranged on one side to a center line in a stacking direction of the tubes in the first distribution part, and further comprising:
a flow amount adjustor disposed on the other side to the center line in the first distribution part, which adjusts a refrigerant amount flowing through the inside of the first distribution part.

6. The refrigerant evaporator according to claim 5 , wherein the second communicating portion is disposed as a plurality of passages, and each of which is connected to the refrigerant inlets, respectively.

7. The refrigerant evaporator according to claim 5 , wherein
the second collecting part is connected with the second communicating portion and is disposed with a refrigerant outlet which makes the refrigerant in the second collecting part flow out to the first distribution part, and wherein
the number of the refrigerant inlets is more than the number of the refrigerant outlet.

8. The refrigerant evaporator according to claim 7 , wherein the number of the refrigerant outlet is one.

Assignees

• Denso Corp

Inventors

• Ota Aun
• Ishizaka Naohisa
• Baba Norimasa
• Chatani Shota
• Nagaya Masakazu
• Torigoe Eiichi
• Kazari Kengo
• Haseba Daisuke

Classifications

• F28F9/0265

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

• F28D1/05333

  with multiple rows of conduits or with multi-channel conduits (F28D1/05341 takes precedence) · CPC title

• F28D1/05325

  with particular pattern of flow, e.g. change of flow direction (F28D1/05341 takes precedence) · CPC title

• F25B39/028 Primary

  having distributing means · CPC title

• F28D1/05391

  with multiple rows of conduits or with multi-channel conduits combined with a particular flow pattern, e.g. multi-row multi-stage radiators · CPC title