Distribution valve and refrigeration system

A refrigeration system (71) comprising a distribution valve, a compressor (74), a first heat exchanger (73), and a second heat exchanger (72);

• wherein the distribution valve includes:
• a housing (1), comprising a valve chamber (10), a housing fluid port (13), a housing first port (12) and a housing second port (11), wherein the housing fluid port (13), the housing first port (12) and the housing second port (11) are each in communication with the valve chamber (10);
• a spool (2) in the housing (1), the spool (2) being mounted in the valve chamber so as to be rotatable relative to the housing (1) along an axial axis (Y), and the spool (2) comprising a sidewall (20), a spool chamber (29), a spool fluid port (261), a spool first port (23) and a spool second port (24), wherein the spool fluid port (261), the spool first port (23) and the spool second port (24) are each in communication with the spool chamber (29), and the sidewall (20) comprises a first spheroidal segment (21) and a second spheroidal segment (22), the spool first port (23) being disposed in the first spheroidal segment (21), and the spool second port (24) being disposed in the second spheroidal segment (22);
• and
• an intermediate member, mounted between the housing (1) and the spool (2), the intermediate member being fixed relative to the housing (1) and being in sliding contact with the sidewall (20) of the spool (2) in a sealed manner, the intermediate member comprising an intermediate first port (314) and an intermediate second port (323), the intermediate first port (314) being in communication with the housing first port (12), and the intermediate second port (323) being in communication with the housing second port (11);
• a first valve port being defined when the spool first port (23) and the intermediate first port (314) overlap, and a second valve port being defined when the spool second port (24) and the intermediate second port (323) overlap, wherein a degree of opening of the first valve port and the second valve port changes as the spool (2) rotates relative to the housing (1), and
• wherein the compressor is in communication with the housing fluid port (13), the first heat exchanger is in communication with the housing first port (12), and the second heat exchanger is in communication with the housing second port (11).

A distribution valve, comprising:

• a housing (1), comprising a valve chamber (10), a housing fluid port (13), a housing first port (12) and a housing second port (11), wherein the housing fluid port (13), the housing first port (12) and the housing second port (11) are each in communication with the valve chamber (10);
• a spool (2) in the housing (1), the spool (2) being mounted in the valve chamber so as to be rotatable relative to the housing (1) along an axial axis (Y), and the spool (2) comprising a sidewall (20), a spool chamber (29), a spool fluid port (261), a spool first port (23) and a spool second port (24), wherein the spool fluid port (261), the spool first port (23) and the spool second port (24) are each in communication with the spool chamber (29), and the sidewall (20) comprises a first spheroidal segment (21) and a second spheroidal segment (22), the spool first port (23) being disposed in the first spheroidal segment (21), and the spool second port (24) being disposed in the second spheroidal segment (22);
• and
• an intermediate member, mounted between the housing (1) and the spool (2), the intermediate member being fixed relative to the housing (1) and being in sliding contact with the sidewall (20) of the spool (2) in a sealed manner, the intermediate member comprising an intermediate first port (314) and an intermediate second port (323), the intermediate first port (314) being in communication with the housing first port (12), and the intermediate second port (323) being in communication with the housing second port (11);
• a first valve port being defined when the spool first port (23) and the intermediate first port (314) overlap, and a second valve port being defined when the spool second port (24) and the intermediate second port (323) overlap,
• wherein a degree of opening of the first valve port and the second valve port changes as the spool (2) rotates relative to the housing (1),
• wherein the spool first port (23) and the spool second port (24) are respectively located at positions where the first spheroidal segment (21) and the second spheroidal segment (22) have maximum diameters in a cross section perpendicular to an axial direction, or the spool first port (23) and the spool second port (24) are located at positions of maximum wall thickness of the first spheroidal segment (21) and the second spheroidal segment (22) respectively, and
• wherein a ratio of height to diameter of the first spheroidal segment (21) and/or the second spheroidal segment (22) is less than 0.5.