US 11,698,084 B2
Method for operating a pump
Manuel Schmieder, Oberderdingen (DE); Volker Block, Bretten (DE); Hannes Kuemmerle, Oberderdingen (DE); Kay Schmidt, Oberderdingen (DE); Michael Tafferner, Malsch (DE); and Henry Zipplies, Eppingen (DE)
Assigned to E.G.O. ELEKTRO-GERAETEBAU GMBH, Oberderdingen (DE)
Filed by E.G.O. Elektro-Geraetebau GmbH, Oberderdingen (DE)
Filed on Mar. 11, 2021, as Appl. No. 17/198,709.
Claims priority of application No. 20171318 (EP), filed on Apr. 24, 2020.
Prior Publication US 2021/0332830 A1, Oct. 28, 2021
Int. Cl. F04D 29/58 (2006.01); F04D 29/42 (2006.01); A47L 15/42 (2006.01); A47L 15/00 (2006.01)
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
OG exemplary drawing
 
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.