Heat-exchanging device for use in microwave appliance, has gas-air-mixing outlets distributed over circumference of pre-mixing burner, where distribution and number of outlets correspond to cooling effect of cool stream from burner chamber

摘要

The device includes a heat-exchanging tube with a cross-section reducer and a flow regulator, and a pre-mixing burner (10). Gas-air-mixing outlets are distributed over the circumference of the burner, where the distribution and the number of outlets correspond to the cooling effect of the cool stream from a burner chamber (3). Two exhaust gas outlets of the chamber are separated by a separation wall.