Antifreeze valve device and plant using said device

Antifreeze device for hydraulic plants including:

• a manifold having a manifold inlet, a manifold outlet, and a channel placing the manifold inlet in fluid communication with the manifold outlet, said manifold including an auxiliary opening between the manifold inlet and the manifold outlet,
• a valve body engaged to the manifold and comprising:
• a valve inlet facing the auxiliary opening of the manifold,
• a drain for discharging fluid in the environment,
• a chamber placing the valve inlet of the valve body in fluid communication with the drain of the valve body,
• a thermosensitive element housed in the chamber and sensitive to temperature variations,
• a shutter engaged to the thermosensitive element and movable between:
• a closed position where said shutter closes the auxiliary opening of the manifold,
• an open position where said shutter allows fluid to enter through the auxiliary opening,
• wherein the manifold includes an orifice, distinct from the auxiliary opening and placing the chamber of the valve body in fluid communication with the channel of the manifold,
• wherein the antifreeze device further comprises an auxiliary shutter configured to be movable between:
• a closed position where said auxiliary shutter closes the drain of the valve body,
• an open position where said auxiliary shutter places the drain in fluid communication with an environment outside the device.

Antifreeze device for hydraulic plants including:

• a manifold having a manifold inlet, a manifold outlet, and a channel placing the manifold inlet in fluid communication with the manifold outlet, said manifold including an auxiliary opening between the manifold inlet and the manifold outlet,
• a valve body engaged to the manifold and comprising:
• a valve inlet facing the auxiliary opening of the manifold,
• a drain for discharging fluid in the environment,
• a chamber placing the valve inlet of the valve body in fluid communication with the drain of the valve body,
• a thermosensitive element housed in the chamber and sensitive to temperature variations,
• a shutter engaged to the thermosensitive element and movable between:
• a closed position where said shutter closes the auxiliary opening of the manifold,
• an open position where said shutter allows fluid to enter through the auxiliary opening,
• wherein the manifold includes an orifice, distinct from the auxiliary opening and placing the chamber of the valve body in fluid communication with the channel of the manifold,
• wherein the shutter, in the open position, defines, in cooperation with a perimeter edge of the auxiliary opening, a fluid passage having maximum cross-section,
• wherein said shutter is also movable in a partially open position wherein it defines, in cooperation with the perimeter edge of the auxiliary opening, a fluid passage having a cross-section smaller than the maximum cross-section.

Antifreeze device for hydraulic plants including:

• a manifold having a manifold inlet, a manifold outlet, and a channel placing the manifold inlet in fluid communication with the manifold outlet, said manifold including an auxiliary opening between the manifold inlet and the manifold outlet,
• a valve body engaged to the manifold and comprising:
• a valve inlet facing the auxiliary opening of the manifold,
• a drain for discharging fluid in the environment,
• a chamber placing the valve inlet of the valve body in fluid communication with the drain of the valve body,
• a thermosensitive element housed in the chamber and sensitive to temperature variations,
• a shutter engaged to the thermosensitive element and movable between:
• a closed position where said shutter closes the auxiliary opening of the manifold,
• an open position where said shutter allows fluid to enter through the auxiliary opening,
• wherein the drain comprises a through opening on a side wall of the valve body, said through opening extending transversally or radially to the side wall.