Heat exchanger of duct type air conditioner and duct type air conditioner

The utility model discloses a duct type air conditioner heat exchanger and duct type air conditioner, the heat exchanger comprises a plurality of heat exchange fins and a plurality of heat exchange tubes, the plurality of heat exchange fins are arranged at intervals along a first direction, and an air flowing space is arranged between adjacent heat exchange fins; the heat exchanger comprises a first part and a second part, the row number of heat exchange pipes of the first part is larger than that of the heat exchange pipes of the second part, on the same vertical plane, the number of the heat exchange pipes of the first part is N1, the number of the heat exchange pipes of the second part is N2, and the heat exchanger meets the following relational expression that N1/N2 is larger than or equal to 1.5 and smaller than or equal to 1.9, and the vertical plane is perpendicular to the first direction. Therefore, the density of the heat exchange pipes of the first part is larger than that of the heat exchange pipes of the second part, the heat exchange efficiency of the first part and the heat exchange efficiency of the second part can be matched with the air flow speed, and the heat exchange effect of the heat exchanger is improved; and efficient heat exchange of the heat exchanger is facilitated.