Injection-molded instantaneous electric water heater with pressure adjusting function

Abstract

Provided is an injection-molded instantaneous electric water heater with a pressure adjusting function. A water tank 8 is made from non-metallic materials through blow molding or injection molding or made from metal materials. A pressure adjuster 12 is mounted on a water inlet pipeline of the water tank and composed of a shell 12-1, a piston 12-2, a cover 12-3 and a rubber part 12-4. The piston 12-2 can shift in the shell 12-1 along with changes of the pressure in the water tank. Meanwhile, a closed type or a semi-opened type device 16 for heating water when the water flows through is arranged in the water tank.

Description

technical field [0001] The invention relates to an injection-molded fast heating electric water heater equipped with a pressure regulator. Background technique [0002] At present, all domestic electric water heaters in the world cannot automatically adjust the pressure in the water tank. They all use pressure-bearing metal water tanks. The pressure is generally 0.6Mpa, and the test pressure is 1.2Mpa; this pressure will cause many difficult problems. Problems; for example, thermal expansion and cold contraction water tanks will crack, leak, and explode under pressure, which is a problem in the world; therefore, many well-known enterprises are trying to reduce the pressure in the water tank, such as: Haier Company Announcement No. CN101825340B "Water Heater for Lowering Inner Tank Pressure 》Two solenoid valves are used to reduce the pressure in the water tank. Not only is the structure complex, but also expensive, and it cannot be commercialized; especially the water tank ma...

AI Technical Summary

Problems solved by technology

[0002] At present, all domestic electric water heaters in the world cannot automatically adjust the pressure in the water tank. They all use pressure-bearing metal water tanks. The pressure is generally 0.6Mpa, and the test pressure is 1.2Mpa; this pressure will cause many difficult problems. Problems; for example, thermal expansion and cold contraction water tanks will crack, leak, and explode under pressure, which is a problem in the world; therefore, many well-known enterprises are trying to reduce the pressure in the water tank, such as: Haier Company Announcement No. CN101825340B "Water Heater for Lowering Inner Tank Pressure 》Two solenoid valves are used to reduce the pressure in the water tank. Not only is the structure complex, but also expensive, and it cannot be commercialized; especially the water tank made of non-metallic materials cannot withstand the working pressure of 0.6Mpa. If it is directly connected to the water source, Due to different regions, different floors, and great differences in water inlet pressure, the possibility of using non-metallic water tanks is very small

Images