Air conditioner and heat exchanger

The utility model relates to an air conditioner and a heat exchanger. The heat exchanger comprises a tank body provided with a heat exchange cavity, and a secondary refrigerant inlet and a secondary refrigerant outlet are formed in the two opposite sides of the heat exchange cavity correspondingly; the heat exchange assembly is contained in the heat exchange cavity; the heat exchange assembly comprises a liquid distributor provided with a liquid supply cavity used for containing refrigerants, and a liquid distribution opening used for outputting liquid refrigerants is formed in the bottom wall of the liquid supply cavity; the heat exchange pipe is located below the liquid distribution opening, and the two ends of the heat exchange pipe communicate with the secondary refrigerant inlet and the secondary refrigerant outlet correspondingly; and the guide piece comprises a guide part, and the guide part extends from the interior of the liquid distribution opening to abut against the peripheral wall of the heat exc