Double-switched automatic sprinkler valve

An automatic sprinkler valve, comprising:

• a valve body having a water inlet and a water outlet inside;
• a valve lid having a first central hole, provided on said valve body and connected to said valve body;
• a valve cover having a second central hole at a top thereof, connected to said valve lid via a lower end of said valve cover;
• a piston barrel, provided inside said valve cover, passing through said first central hole;
• a magnetic core assembly, provided inside said piston barrel;
• a magnetic loop sheath, sleeved on said piston barrel;
• a magnetic loop assembly, provided inside said magnetic loop sheath;
• a movable rod having a third central hole in an upper part, wherein a lower end thereof resists against said magnetic loop sheath and an upper end thereof passes through said second central hole;
• a memory alloy, sleeved on said movable rod, wherein a lower end of said memory alloy touches said valve cover;
• a heat concentrating cover which is connected to said movable rod and presses down said memory alloy;
• and
• a piston having a decompression hole and an aperture, provided on said water outlet and below said magnetic core assembly, wherein said aperture is communicated with said water inlet, in such a manner that, when temperature increases or decreases, said memory alloy expands or shrinks and correspondently said movable rod moves upwardly or downwardly, as well as said magnetic loop assembly and said magnetic core assembly inside said piston barrel under actions of magnetic forces, so as to open or block said decompression hole to further open or close said automatic sprinkler valve.