Refrigerant evaporator

Patent metadata

Field	Value
Publication number	US-10030899-B2
Application number	US-201515518487-A
Country	US
Kind code	B2
Filing date	Oct 9, 2015
Priority date	Oct 16, 2014
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

A refrigerant evaporator includes a plurality of vertically disposed flat tubes, and a refrigerant distribution and supply section that causes inflowing refrigerant to flow out to the plurality of flat tubes on a downstream side. The refrigerant distribution and supply section includes a refrigerant supply section having plural supply spaces, a refrigerant introduction and distribution section having an introduction space to introduce the inflowing refrigerant from a lower end side surface, and a distribution space to distribute the refrigerant, and plural connecting passages that guide the refrigerant to the supply spaces. A first flat tube communicating with a lowermost-tier supply space positioned on the lowermost side is disposed at a height position included in a height range of the introduction space, and a lowermost-tier connecting passage that guides the refrigerant to the lowermost-tier supply space is disposed at a position higher than the introduction space.

First claim

What is claimed is:

1. A refrigerant evaporator comprising:
a plurality of flat tubes disposed along a vertical direction; and
a refrigerant distribution and supply section that causes inflowing refrigerant to flow out to the plurality of flat tubes on a downstream side,
the refrigerant distribution and supply section including
a refrigerant supply section extending in the vertical direction and having a plurality of supply spaces formed therein that divide the plurality of flat tubes into a plurality of refrigerant paths including a predetermined number of the flat tubes along the vertical direction and cause the refrigerant to flow out,
a refrigerant introduction and distribution section extending in the vertical direction and having
a refrigerant introduction section with an introduction space formed therein to introduce the inflowing refrigerant from a lower end side surface, and
a refrigerant distribution section a distribution space formed therein to distribute the refrigerant, and

a plurality of connecting passages that guide the refrigerant from the refrigerant distribution section to the plurality of supply spaces in the refrigerant supply section, and

a lowermost-tier supply space of the plurality of supply space positioned on a lowermost side relative to a remainder of the plurality of supply spaces, and a lowermost-tier connecting passage of the plurality of connecting passages guiding the refrigerant to the lowermost-tier supply space, and a first flat tube of the plurality of flat tubes being positioned on the lowermost side relative to a remainder of the flat tubes communicating with the lowermost-tier supply space,
the first flat tube being disposed at a height position included in a height range of the introduction space, and the lowermost-tier connecting passage being disposed at a position higher than the introduction space.

2. The refrigerant evaporator according to claim 1 , wherein
the introduction space and the distribution space are partitioned from each other by a nozzle member having a nozzle hole formed therein.

3. The refrigerant evaporator according to claim 2 , wherein
the nozzle member has a nozzle recess portion formed in an upper surface thereof, the nozzle recess portion is a recessed part larger in diameter than the nozzle hole, and the distribution space is configured by a space formed by the nozzle recess portion.

4. The refrigerant evaporator according to claim 1 , wherein
a second flat tube of the plurality of the flat tubes is positioned on an uppermost side relative to a remainder of the predetermined number of the flat tubes communicating with the lowermost-tier supply space,
the lowermost-tier connecting passage is disposed at a height position even with or higher than the second flat tube.

5. The refrigerant evaporator according to claim 1 , wherein
the refrigerant supply section, the refrigerant introduction and distribution section, and the connecting passages are formed in a single header-distributor dual purpose case extending in the vertical direction.

6. The refrigerant evaporator according to claim 1 , wherein
the refrigerant supply section is formed in a header case extending in the vertical direction,
the refrigerant introduction and distribution section is formed in a distributor case extending in the vertical direction, and
the header case and the distributor case are connected to each other via a plurality of connecting pipes forming the plurality of connecting passages.

7. The refrigerant evaporator according to claim 2 , wherein
a second flat tube of the plurality of the flat tubes is positioned on an uppermost side relative to a remainder of the predetermined number of the flat tubes communicating with the lowermost-tier supply space,
the lowermost-tier connecting passage is disposed at a height position even with or higher than the second flat tube.

8. The refrigerant evaporator according to claim 2 , wherein
the refrigerant supply section, the refrigerant introduction and distribution section, and the connecting passages are formed in a single header-distributor dual purpose case extending in the vertical direction.

9. The refrigerant evaporator according to claim 2 , wherein
the refrigerant supply section is formed in a header case extending in the vertical direction,
the refrigerant introduction and distribution section is formed in a distributor case extending in the vertical direction, and
the header case and the distributor case are connected to each other via a plurality of connecting pipes forming the plurality of connecting passages.

10. The refrigerant evaporator according to claim 3 , wherein
a second flat tube of the plurality of the flat tubes is positioned on an uppermost side relative to a remainder of the predetermined number of the flat tubes communicating with the lowermost-tier supply space,
the lowermost-tier connecting passage is disposed at a height position even with or higher than the second flat tube.

11. The refrigerant evaporator according to claim 3 , wherein
the refrigerant supply section, the refrigerant introduction and distribution section, and the connecting passages are formed in a single header-distributor dual purpose case extending in the vertical direction.

12. The refrigerant evaporator according to claim 3 , wherein
the refrigerant supply section is formed in a header case extending in the vertical direction,
the refrigerant introduction and distribution section is formed in a distributor case extending in the vertical direction, and
the header case and the distributor case are connected to each other via a plurality of connecting pipes forming the plurality of connecting passages.

13. The refrigerant evaporator according to claim 4 , wherein
the refrigerant supply section, the refrigerant introduction and distribution section, and the connecting passages are formed in a single header-distributor dual purpose case extending in the vertical direction.

14. The refrigerant evaporator according to claim 4 , wherein
the refrigerant supply section is formed in a header case extending in the vertical direction,
the refrigerant introduction and distribution section is formed in a distributor case extending in the vertical direction, and
the header case and the distributor case are connected to each other via a plurality of connecting pipes forming the plurality of connecting passages.

Assignees

• Daikin Ind Ltd

Inventors

• Jindou Masanori
• Oritani Yoshio
• Sakamaki Tomohiko
• Hamadate Junichi

Classifications

• F25B39/00 Primary

  Evaporators; Condensers · CPC title

• F25B13/00

  Compression machines, plants or systems, with reversible cycle (defrosting cycles F25B47/02) · CPC title

• F28F9/02

  Header boxes; End plates · CPC title

• F25B39/028 Primary

  having distributing means · CPC title

• F28F9/028

  by using inserts for modifying the pattern of flow inside the header box, e.g. by using flow restrictors or permeable bodies or blocks with channels · CPC title