Constant-temperature welding device for microwave assembly

The invention discloses a microwave assembly constant-temperature welding device which comprises a conveying unit used for conveying a combination of a microwave assembly and an inner cover plate to a welding station, and the inner cover plate in the combination is arranged at the upper end of the microwave assembly; the constant-temperature heating unit is arranged below the welding station, the conveying unit conveys the assembly to the constant-temperature heating unit to reach the welding station, and the constant-temperature heating unit makes contact with the microwave assembly and heats the microwave assembly; the pressurizing unit is arranged above the welding station, and the pressurizing unit is used for pressing the inner cover plate in a contact mode so as to press the inner cover plate on the microwave assembly; and the heat conduction unit is in heat conduction connection with the constant-temperature heating unit and the pressurizing unit and is used for conducting heat of the constant-temperat