A heat exchange assembly, comprising a heat exchange core body and a mounting plate which is fixed to the heat exchange core body , the heat exchange assembly further comprising a first port , a second port , a third port and a fourth port , the heat exchange core body comprising an end plate, and the heat exchange core body further comprising a first flow passage and a second flow passage which are isolated from each other; the first flow passage being in communication with the first port and the second port , the second flow passage being in communication with the third port and the fourth port , and the second flow passage comprising a first passage and a second passage ; wherein the heat exchange assembly further comprises a valve assembly and an adapter seat, the adapter seat is provided with a cavity corresponding to the second passage and a fifth port in communication with the cavity, and the valve assembly is arranged in or partially arranged in the second passage ; the valve assembly comprises a main valve body and a valve core arranged in the main valve body , one end of the main valve body is sealingly mounted with the adapter seat, and another end of the main valve body is sealingly mounted with an inner wall of the fourth port or the second passage ; a side wall of the main valve body is provided with a first notch , a first valve port and a second valve port are arranged in the main valve body , and a first spring and a second spring are further arranged in the main valve body , the second spring is made of a memory alloy, an elastic force of the second spring , when the second spring gains elastic performance, is greater than an elastic force of the first spring at this time instant, and a direction of the force of the first spring acting on the valve core is opposite to a direction of the force of the second spring acting on the valve core ; the third port is in communication with the fourth port via the first passage , the second passage , the first notch and the first valve port when the first valve port is open and the second valve port is closed; and the third port is in communication with the fifth port via the first passage , the second passage , the first notch and the second valve port when the first valve port is closed and the second valve port is open. the valve assembly comprises a main valve body and a valve core arranged in the main valve body , one end of the main valve body is sealingly mounted with the adapter seat, and another end of the main valve body is sealingly mounted with an inner wall of the fourth port or the second passage ; a side wall of the main valve body is provided with a first notch , a first valve port and a second valve port are arranged in the main valve body , and a first spring and a second spring are further arranged in the main valve body , the second spring is made of a memory alloy, an elastic force of the second spring , when the second spring gains elastic performance, is greater than an elastic force of the first spring at this time instant, and a direction of the force of the first spring acting on the valve core is opposite to a direction of the force of the second spring acting on the valve core ; the third port is in communication with the fourth port via the first passage , the second passage , the first notch and the first valve port when the first valve port is open and the second valve port is closed; and the third port is in communication with the fifth port via the first passage , the second passage , the first notch and the second valve port when the first valve port is closed and the second valve port is open. <EOS>