A first header tank of a condenser serves as a condensation section outlet header section. A second header tank has lower end upper ends respectively located below and above the lower end of the first header tank. A portion of a second header tank located below the lower end of the first header tank serves as a super-cooling section inlet header section. The second header tank also serves as a reservoir section. The interior of the condensation section outlet header section of the first header tank communicates, through a communication section, with a portion of the interior of the second header tank, which portion is located above the lower end of the first header tank. A flow velocity reducing member is provided in the second header tank so as to reduce the flow velocity of liquid-phase dominant refrigerant which flows into the reservoir section through the communication section.
1. A condenser comprising:
a first header tank which is provided on one side of the condenser;
a second header tank provided on the one side of the condenser and having a gas-liquid separation function, an upper end of the second header tank being located above a lower end of the first header tank;
a third header tank provided on another side of the condenser opposite to the one side;
a plurality of short heat exchange tubes extending in an extending direction between the first header tank and the third header tank to connect the first header tank and the third header tank;
a plurality of long heat exchange tubes provided below the plurality of short heat exchange tubes and extending in the extending direction between the second header tank and the third header tank to connect the second header tank and the third header tank without being connected to the first header tank, the plurality of long heat exchange tubes being longer than the plurality of short heat exchange tubes in the extending direction, the plurality of long heat exchange tubes being inserted into the second header tank to have tube ends of the long heat exchange tubes in the second header tank and to have an inside length in the extending direction from the tube ends of the long heat exchange tubes to an inner surface of the second header tank;
a communication section directly connecting the first header tank and the second header tank, the first header tank directly connecting plurality of short heat exchange tubes and the communication section, the communication section having a first end portion and a second end portion opposite to the first end portion, the first end portion being brazed to the first header tank, the second end portion being brazed to the second header tank; and
a flow velocity reducing member provided in the second header tank to face the second end portion of the communication section, a distance in the extending direction from the second end portion of the communication section to the flow velocity reducing member being smaller than the inside length in the extending direction of the long heat exchange tubes.
2. The condenser according to claim 1 , wherein the flow velocity reducing member is made of a mesh material.
3. The condenser according to claim 2 , further comprising:
a foreign matter removal member provided in the second header tank downstream the flow velocity reducing member.
4. The condenser according to claim 3 , further comprising:
a support frame holding the mesh material,
wherein the foreign matter removal member comprises
a frame member having a communication opening through which refrigerant passes, and
a filter covering the communication opening; and
wherein the support frame of the flow velocity reducing member and the frame member of the foreign matter removal member are integrally formed or assembled together to form an assembly.
5. The condenser according to claim 2 , wherein the mesh material has an opening size of 160 μm or less and an opening ratio of 50% or less.
6. The condenser according to claim 1 , further comprising:
a desiccant provided in the second header tank such that the desiccant does not interfere with the flow velocity reducing member.
7. The condenser according to claim 1 , wherein the first header tank and the second header tank are positionally shifted from each other.
8. The condenser according to claim 1 , wherein the refrigerant is to flow into the third header tank from an outside of the condenser.
9. The condenser according to claim 1 , wherein the flow velocity reducing member has a plate shape and is supported by a rectangular frame.
10. The condenser according to claim 1 ,
wherein the first header tank has a first through hole,
wherein the second header tank has a second through hole one end of which faces the first through hole and an opposite end of which faces the flow velocity reducing member, and
wherein the communication section has a communication member brazed to the first header tank and the second header tank to connect the first through hole and the second through hole.