Heat exchanger and air-conditioning apparatus

A heat exchanger comprising:

• a distributor extending in a top-bottom direction in a form of a pipe and in which refrigerant flows;
• a plurality of heat-transfer tubes connected to the distributor while being arranged at intervals from one another in the top-bottom direction, the heat-transfer tubes receiving the refrigerant flowing from the distributor;
• and
• a refrigerant inflow pipe connected to the distributor at a position below a lowest one of the plurality of heat-transfer tubes and through which the refrigerant flows into the distributor,
• wherein the plurality of heat-transfer tubes connected to the distributor stick out into an internal space of the distributor such that when the plurality of heat-transfer tubes and a part defined as the internal space are projected on a plane perpendicular to an axial direction of the distributor, the plurality of heat-transfer tubes occupies one-half or greater of the part defined as the internal space;
• wherein the distributor
• includes an orifice plate being in a form of a plate and dividing the internal space into an upper space and a lower space in a longitudinal direction of the distributor;
• wherein the orifice plate is
• located above the lowest one of the plurality of heat-transfer tubes in the internal space;
• wherein the orifice plate has an orifice that is a through-hole through which the upper space and the lower space communicate with each other;
• and
• wherein the orifice plate
• includes a projecting wall provided at a peripheral edge of the orifice and projecting upward from a top face of the orifice plate.

A heat exchanger comprising:

• a distributor extending in a top-bottom direction in a form of a pipe and in which refrigerant flows;
• a plurality of heat-transfer tubes connected to the distributor while being arranged at intervals from one another in the top-bottom direction, the heat-transfer tubes receiving the refrigerant flowing from the distributor;
• and
• a refrigerant inflow pipe connected to the distributor at a position below a lowest one of the plurality of heat-transfer tubes and through which the refrigerant flows into the distributor,
• wherein the plurality of heat-transfer tubes connected to the distributor stick out into an internal space of the distributor such that when the plurality of heat-transfer tubes and a part defined as the internal space are projected on a plane perpendicular to an axial direction of the distributor, the plurality of heat-transfer tubes occupies one-half or greater of the part defined as the internal space;
• wherein the distributor
• includes an orifice plate being in a form of a plate and dividing the internal space into an upper space and a lower space in a longitudinal direction of the distributor;
• wherein the orifice plate is
• located above the lowest one of the plurality of heat-transfer tubes in the internal space;
• wherein the orifice plate has an orifice that is a through-hole through which the upper space and the lower space communicate with each other;
• and
• wherein the orifice plate is
• shaped such that an opening size of the orifice decreases from a bottom face of the orifice plate toward a top face of the orifice plate.