Small-sized pool and PTC heater for internal liquid heating

A dual-layer insulation and sealing PTC heater, wherein, the said dual-layer insulation and sealing PTC heater includes,

• PTC heating component, the first layer of insulation and sealing component outside PTC heating component, and the second layer of insulation and sealing component outside the first layer of insulation and sealing component;
• the said first layer of insulation and sealing component further includes several layers of insulation film 13 wrapped outside PTC heating component, and heat-conducting shell 14 outside several layers of insulation film 13;
• the said second layer of insulation and sealing component further includes several layers of insulation film 13 wrapped outside the shell 14 of the first layer of insulation and sealing component, as well as the heat-conducting shell 14 outside several layers of insulation film 13;
• the said PTC heater also includes waterproof insulation paste 15 filled at two ends openings of shell 14 of the first layer and second layer of insulation and sealing components.

A small sized pool, wherein, said small sized pool is equipped with several PTC heaters 10 which are used to heat the contacting liquid in the pool;

• the said heater 10 includes PTC heating component and at least two-layer insulation and sealing component outside the mentioned PTC heating component;
• as to every said insulation and sealing component, there are multiple layers of insulation layer;
• the said insulation layer is multiple layers of insulation film 13 which is wrapped outside the mentioned PTC heating component or wrapped outside other insulation and sealing components;
• as to every mentioned insulation and sealing component, there are multiple layers of sealing layer;
• the sealing layer further includes heat-conducting shell 14, so that the insulation film 13 and other wrapped insulation and sealing components or PTC heating component are placed in the shell 14;
• waterproof insulation paste 15 is filled at openings of the shell 14 two ends.