Water storage type electric water heater

Water storage type electric water heater

  • CN 2,483,657 Y
  • Filed: 02/19/2001
  • Issued: 03/27/2002
  • Est. Priority Date: 02/19/2001
  • Status: Active Grant
First Claim
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1. water-storage electric heater;

  • it comprises shell (1), includes water storage metal inner tube (4), the temperature controller (2) of heating (3); and

    be fixed in ground terminal (5) on the shell (1) jointly, be used for the metal interface (6,7) of Inlet and outlet water;

    if above-mentioned ground terminal, two metal interfaces and shell be metal also comprise shell implement to be electrically connected constitute behind the ground connection equipotential body again with the external power source permanent wiring in ground protection conductor PE be electrically connected, it is characterized in that it also comprises;

    When being fixed within the shell (1), add liner and filler (8) that use, the insulation material to metal inner tube (4), to cut off direct electrical link between metal inner tube (4) and the above-mentioned ground connection equipotential body;

    Metal interface (6,7) the two water columns isolation pipelines (9,10) bipartite, that the inner turnover of enforcement water route is connected, the insulation material that are used for Inlet and outlet water on being arranged on metal inner tube (4) and being fixed in shell (1);

    Be separately positioned on two water columns and isolate two metals on the pipelines (9,10), that all implement to be electrically connected with inside center line N '"'"' as one of heating (3) power supply lead and cross water pipe (11,12), its inside is the neutral point waters;

    A kind of holding circuit of forming by high impedance sample circuit (13), on-off circuit (14), executive circuit (15) (16);

    ground protection conductor PE is electrically connected in its public ground G and the external power source permanent wiring, and its high impedance sample circuit (13) directly obtains sampled voltage U from external power source center line N by the button switch K break contact N, the button switch K moving together contact is then passed through high resistance measurement R 1L is electrically connected with the external power source phase line, takes button switch K off and then makes high impedance sample circuit (13) through R 1L obtains sampled voltage U from the external power source phase line N

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