Two protection ovens of stage able to programme intensification

The utility model belongs to the technical field of semiconductor package, a two protection ovens of stage able to programme intensification is related to, install time relay, multistage temperature controller able to programme and contactor in the control box, install secondary temperature controller, contactor and air -blower in the oven, the time relay input is connected with switch, the outputinserts multistage temperature controller input able to programme, be connected with secondary temperature controller input through oven switch simultaneously, multistage temperature controller output able to programme is connected with first contactor input, first contactor output is connected with the inlet wire end of connecting row, the connecting row leading -out terminal respectively with the second, third contactor input, blower connection, the equal by heating switch of second and third contactor input is connected with secondary temperature controller output, the utility model discloses an able to programme