Water curtain head for preventing fire spread between floors in curtain wall building

A water curtain head comprising:

• a head body connected to a water supply pipe installed inside a building and having a water releasing opening;
• a deflector having a spray nozzle allowing water discharged by the water releasing opening to pass therethrough;
• a heat sensing portion disposed between the head body and the deflector;
• and
• a cover covering the head body and the deflector,
• wherein the deflector includes
• a first spray nozzle formed on a front surface of the deflector to penetrate through the front surface of the deflector, and
• a plurality of second spray nozzles depressed inwards from a side surface of the deflector by a predetermined section,
• wherein the deflector has a shape of a disk,
• wherein the plurality of second spray nozzles are formed in a circumferential direction of the disk,
• wherein the plurality of second spray nozzles are formed only in a partial region excluding an upper region of a circumference of the disk,
• wherein the deflector is formed to get thicker from center to outside,
• wherein the deflector is formed to thicken towards the water releasing opening,
• wherein the water releasing opening is configured to discharge water horizontally, and
• wherein the head body included:
• a first body, and
• a second body formed in a direction perpendicular to the first body and having the ater releasing opening,
• wherein the first spray nozzle is formed to discharge water in a same direction as the discharge of water from the water releasing opening,
• wherein the plurality of second spray nozzles are formed to discharge water in a direction perpendicular to the discharge of water from the first spray nozzle,
• wherein the cover includes:
• a front surface corresponding to the direction in which water sprayed through the first spray nozzle, and
• a lower surface formed in a direction perpendicular to the front surface of the cover and corresponds to the direction in which water sprayed through the plurality of second spray nozzles, and
• wherein the cover includes a first heat sensing hole formed at a position of the front surface of the cover corresponding to the first spray nozzle and a second heat sensing hole formed at a position of tee lower surface of the cover corresponding to the plurality of second spray nozzles.