Vacuum sealer

A vacuum sealer, comprising:

• a base and a cover, the cover being movably hinged to a rear edge of the base, the base being configured with a vacuum pump, a control circuit board, and a power cord, wherein the vacuum pump is electrically connected to the control circuit board;
• an upper vacuum chamber and a lower vacuum chamber, wherein the upper vacuum chamber corresponds to the lower vacuum chamber to form a heat-seal area when the cover is closed against the base, and wherein the upper and lower vacuum chambers are each configured with a sealing gasket at their peripheries;
• a heating sheet assembly electrically connected to the control circuit board and positioned on a front edge of the base opposite to the rear edge of the base;
• and a heat-seal strip positioned on a front edge of the cover opposite to the rear edge of the base;
• wherein the heating sheet assembly comprises a metal heating sheet and a high-temperature-resistant insulating film coating the metal heating sheet;
• wherein the metal heating sheet is formed with a hollowed pattern;
• shaping the metal heating sheet into one or more continuous, densely arranged curved wires;
• wherein the heating sheet assembly further comprises a high-temperature-resistant transparent adhesive tape, a mounting bracket, and a thermal conductive sheet;
• wherein the thermal conductive sheet and the metal heating sheet coated by the high-temperature-resistant insulating film are mounted on the mounting bracket;
• and wherein a temperature control switch and a switch fixed mount, and a thermosensitive resistor and a resistor fixed mount are installed on left and right sides of the mounting bracket, respectively.