A condenser, comprising: housing comprising an inner cavity; an air conditioner oil separator being disposed in the housing, said air conditioner oil separator comprising: a gas inlet for introducing a refrigerant to be separated, and a gas outlet communicating with an inner cavity of the housing for outputting a separated refrigerant; and a pipeline, which is disposed in the housing and is configured to be used for a medium for heat exchange with a refrigerant discharged from the gas outlet to flow; wherein the air conditioner oil separator further comprises: a filter component disposed at the gas outlet; the filter component comprises: a first filter area; a second filter area, which is closer to the gas inlet than the first filter area; and a third filter area, which is closer to the gas inlet than the second filter area; wherein the first filter area, the second filter area and the third filter area are arranged side by side in a direction close to the gas inlet; characterized in that a separation efficiency of the first filter area for the refrigerant is lower than a separation efficiency of the second filter area for the refrigerant; and, a separation efficiency of the third filter area for the refrigerant is lower than the separation efficiency of the second filter area for the refrigerant; the separation efficiency of the third filter area for the refrigerant is higher than a separation efficiency of the first filter area for the refrigerant. housing comprising an inner cavity; an air conditioner oil separator being disposed in the housing, said air conditioner oil separator comprising: a gas inlet for introducing a refrigerant to be separated, and a gas outlet communicating with an inner cavity of the housing for outputting a separated refrigerant; and a pipeline, which is disposed in the housing and is configured to be used for a medium for heat exchange with a refrigerant discharged from the gas outlet to flow; wherein the air conditioner oil separator further comprises: a filter component disposed at the gas outlet; the filter component comprises: a first filter area; a second filter area, which is closer to the gas inlet than the first filter area; and a third filter area, which is closer to the gas inlet than the second filter area; wherein the first filter area, the second filter area and the third filter area are arranged side by side in a direction close to the gas inlet; characterized in that a separation efficiency of the first filter area for the refrigerant is lower than a separation efficiency of the second filter area for the refrigerant; and, a separation efficiency of the third filter area for the refrigerant is lower than the separation efficiency of the second filter area for the refrigerant; the separation efficiency of the third filter area for the refrigerant is higher than a separation efficiency of the first filter area for the refrigerant. a first filter area; a second filter area, which is closer to the gas inlet than the first filter area; and a third filter area, which is closer to the gas inlet than the second filter area; wherein the first filter area, the second filter area and the third filter area are arranged side by side in a direction close to the gas inlet; characterized in that a separation efficiency of the first filter area for the refrigerant is lower than a separation efficiency of the second filter area for the refrigerant; and, a separation efficiency of the third filter area for the refrigerant is lower than the separation efficiency of the second filter area for the refrigerant; the separation efficiency of the third filter area for the refrigerant is higher than a separation efficiency of the first filter area for the refrigerant.