CPC F04D 29/588 (2013.01) [A47L 15/4225 (2013.01); A47L 15/4285 (2013.01); A47L 15/4287 (2013.01); F04D 29/426 (2013.01); A47L 15/0057 (2013.01); A47L 2401/12 (2013.01); A47L 2501/05 (2013.01); A47L 2501/06 (2013.01)] | 23 Claims |
1. A method for operating a pump with an integrated heating element, wherein said pump comprises: a pump chamber with an inlet into said pump chamber and with an outlet out of said pump chamber and with a wall, a pump rotor inside said pump chamber, a drive motor for said pump rotor, a heating element being provided on at least a part of said wall of said pump chamber, and a temperature sensor for sensing a temperature of water in said pump chamber, the method comprising the steps of:
A providing water in said pump chamber,
B rotating said pump rotor for mixing said water in said pump chamber without transporting water out of said pump chamber,
C measuring a temperature of said water in said pump chamber with said temperature sensor as a starting temperature,
D activating said heating element to heat said water in said pump chamber after measuring said temperature of said water,
E measuring said temperature of said water in said pump chamber with said temperature sensor,
F deactivating said heating element and determining a maximum temperature of said water during a heating duration of step D or within a maximum of 10 sec after a heating duration of step D, and
G calculating a temperature relation between said maximum temperature and said starting temperature of the water,
wherein:
said steps A to G are executed in said pump at a beginning of an operation of said pump or at one of first 50 operating cycles of said pump for determining an initial temperature relation,
said steps A to G are executed again at a later stage for determining a later temperature relation to determine a heating efficiency of said pump by comparing said later temperature relation to said initial temperature relation, and
said water in said pump chamber is heated up to a maximum temperature of no more than 80° C.
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