Anti-freezing control circuit of welding equipment water-cooling system

The utility model discloses an anti-freezing control circuit of a water cooling system of welding equipment, which comprises a first branch, a second branch, a third branch, a fourth branch, a fifth branch, a sixth branch and a seventh branch. The anti-freezing control circuit further comprises a second branch connected to the two ends of the start-stop switch in parallel, and the second branch isformed by connecting a first contact, a second contact and a time relay contact of the selection switch in series. The contact of the time relay is controlled by a third branch circuit; and the thirdbranch circuit is formed by connecting an air circuit breaker, contacts (3 and 4) of a selection switch and a time relay coil in series. And the time relay is a DH48S-S time relay. And the selectionswitch is an XB2BD21C selection switch. The anti-frost-cracking device is simple in circuit structure, does not need to be attended by a specially-assigned person, can effectively prevent frost cracking of the cooling water pip