The intention relates to an integrated type microchannel
heat exchanger which comprises a
heat exchanger core, an afflux loop and a
pressure sensing device. At least one afflux loop is connected to the
heat exchanger core in a communicated manner and comprises a first afflux
pipe and a second afflux
pipe; the
pressure sensing device is connected between the first afflux
pipe and the second afflux pipe in a communicated manner, and comprises a valve body, a plug, a spring, a supporting rod and a
valve seat, a containing cavity is formed in the valve body, a
valve opening is formed in the left side of the containing cavity, the
valve seat is connected to the right side of the containing cavity, the plug is arranged at the position, where a
valve opening is located, in the containing cavity, a guide hole is formed in the center of the
valve seat, the supporting rod penetrates the guide hole, the left end of the supporting rod is connected with the plug, and the spring is arranged between the plug and the valve seat in a sleeving manner; and a circulation hole is formed in the
peripheral side of the guide hole of the valve seat, and the two ends of the valve body are through and are connected with the first afflux pipe and the second afflux pipe in a communicated manner. According to the integrated type microchannel heat exchanger, the reliability of the microchannel heat exchanger is improved, and the service life of the microchannel heat exchanger is prolonged.