Receiver tank for use in refrigeration cycle, heat exchanger with said receiver tank, and condensing apparatus for use in refrigeration cycle

A heat exchanger with a receiver-tank, comprising:

• a heat exchanger body including a pair of headers disposed in parallel at a certain distance, a plurality of heat exchanging tubes with both ends thereof connected to said pair of headers in fluid communication and a condensing portion outlet for discharging refrigerant condensed while passing through said heat exchanging tubes;
• a receiver-tank having a receiver-tank inlet and a receiver-tank outlet each formed in a bottom wall of said receiver-tank, said receiver-tank accumulating refrigerant introduced from said receiver-tank inlet and discharging only liquefied refrigerant from said receiver-tank outlet;
• and
• a refrigerant passage for introducing the refrigerant flowed out of said condensing portion outlet into said receiver-tank inlet,
• wherein a flow-resistance layer for reducing a flow velocity of refrigerant passing through said flow-resistance layer is provided in said receiver-tank such that an upper space is formed above said flow-resistance layer, wherein a suction pipe is provided in said receiver-tank, said suction pipe having an upper end opened toward said upper space and a lower end communicated with said receiver-tank outlet, whereby refrigerant introduced into said receiver-tank via said receiver-tank inlet passes through said flow-resistance layer upward to cause liquid stagnation of liquefied refrigerant in said upper space, and the liquefied refrigerant flows out of said receiver-tank outlet via said suction pipe, and
• wherein said suction pipe is constituted by said refrigerant-tank outlet.

A heat exchanger with a receiver-tank, comprising:

• a heat exchanger body including a pair of headers disposed in parallel at a certain distance, a plurality of heat exchanging tubes with both ends thereof connected to said pair of headers in fluid communication, partitioning members each partitioning an inside of said header to thereby group said plurality of heat exchanging tubes into a condensing portion and a subcooling portion, a condensing portion outlet for discharging refrigerant condensed while passing through said heat exchanging tubes and a subcooling portion inlet for introducing refrigerant into said subcooling portion;
• a receiver-tank having a receiver-tank inlet and a receiver-tank outlet each formed in a bottom wall of said receiver-tank, said receiver-tank accumulating refrigerant introduced from said receiver-tank inlet and discharging only liquefied refrigerant from said receiver-tank outlet;
• and
• a refrigerant passage for introducing the refrigerant discharged from said condensing portion outlet into said receiver-tank inlet and introducing the refrigerant discharged from said receiver-tank outlet into said subcooling portion inlet,
• wherein a flow-resistance layer for reducing a flow velocity of refrigerant passing through said flow-resistance layer is provided in said receiver-tank such that an upper space is formed above said flow-resistance layer,
• wherein a suction pipe is provided in said receiver-tank, said suction pipe having an upper end opened toward said upper space and a lower end communicated with said receiver-tank outlet,
• whereby refrigerant introduced into said receiver-tank via said receiver-tank inlet passes through said flow-resistance layer upward to cause liquid stagnation of liquefied refrigerant in said upper space, and the liquefied refrigerant flows out of said receiver-tank outlet via said suction pipe, and
• wherein said suction pipe is constituted by said refrigerant-tank outlet.

A condensing apparatus for use in a refrigeration cycle, said condensing apparatus, comprising:

• a condenser including a condensing portion for condensing refrigerant and a condensing portion outlet for discharging the refrigerant condensed by said condensing portion;
• a receiver-tank having a receiver-tank inlet and a receiver-tank outlet each formed in a bottom wall of said receiver-tank, said receiver-tank accumulating refrigerant introduced from said receiver-tank inlet and discharging only liquefied refrigerant from said receiver-tank outlet;
• and
• a refrigerant passage for introducing the refrigerant flowed out of said condensing portion outlet into said receiver-tank inlet,
• wherein a flow-resistance layer for reducing a flow velocity of refrigerant passing through said flow-resistance layer is provided in said receiver-tank such that an upper space is formed above said flow-resistance layer,
• wherein a suction pipe is provided in said receiver-tank, said suction pipe having an upper end opened toward said upper space and a lower end communicated with said receiver-tank outlet,
• whereby refrigerant introduced into said receiver-tank via said receiver-tank inlet passes through said flow-resistance layer upward to cause liquid stagnation of liquefied refrigerant in said upper space, and the liquefied refrigerant flows out of said receiver-tank outlet via said suction pipe, and
• wherein said suction pipe is constituted by said refrigerant-tank outlet.