Refrigerant evaporator
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.
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.