Liquid heating pump for conveying and heating liquid in a water-bearing domestic appliance

A liquid heating pump for conveying and heating liquid in a household appliance which uses water, in particular a household dishwasher heating pump or washing machine heating pump, said liquid heating pump comprising:

• a housing having a centrally arranged suction channel for suctioning the liquid in an axial suction direction, an impeller chamber arranged axially downstream of the suction channel and receiving suctioned liquid, and a diffusor and/or pressure chamber which is arranged axially downstream of the impeller chamber, viewed counter to the suction direction, and which is arranged externally, in particular coaxially, at least around a partial portion of the suction channel;
• an impeller rotatably mounted in the impeller chamber for conveying the liquid into the diffusor and/or pressure chamber;
• a stationary diffusor in the diffusor and/or pressure chamber, said diffusor comprising a main body having a front wall in facing relation to the impeller chamber to form a front defining wall of the impeller chamber, said main body of the diffusor including on the front wall at least one guide blade portion which axially protrudes in a direction of the impeller into a liquid ejection region of the impeller arranged around an outer periphery of the impeller, said guide blade portion extending away from the liquid ejection region, in particular positioned obliquely deviating from a radial direction in an impeller direction, toward an axial outer casing of the main body, in particular as far as the axial outer casing of the main body, which is arranged further radially outwardly than the liquid ejection region of the impeller;
• a heating device operably connected to the diffusor and/or pressure chamber for heating the liquid, said heating device in particular comprising at least one, preferably axially extending, partial portion of an external defining wall of the diffusor and/or pressure chamber, with the axial outer casing of the main body of the diffusor in particular forming at least one, preferably axially extending, partial portion of an internal defining wall of the diffusor and/or pressure chamber;
• and
• a discharge port for ejecting the liquid.

A household appliance which uses water, in particular a household dishwasher or household washing machine, comprising a liquid heating pump, said liquid heating pump comprising a housing having a centrally arranged suction channel for suctioning the liquid in an axial suction direction, an impeller chamber arranged axially downstream of the suction channel and receiving suctioned liquid, and a diffusor and/or pressure chamber which is arranged axially downstream of the impeller chamber, viewed counter to the suction direction, and which is arranged externally, in particular coaxially, at least around a partial portion of the suction channel, an impeller rotatably mounted in the impeller chamber for conveying the liquid into the diffusor and/or pressure chamber, a stationary diffusor in the diffusor and/or pressure chamber, said diffusor comprising a main body having a front wall in facing relation to the impeller chamber to form a front defining wall of the impeller chamber, said main body of the diffusor including on the front wall at least one guide blade portion which axially protrudes in a direction of the impeller into a liquid ejection region of the impeller arranged around an outer periphery of the impeller, said guide blade portion extending away from the liquid ejection region, in particular positioned obliquely deviating from a radial direction in an impeller direction, toward an axial outer casing of the main body, in particular as far as the axial outer casing of the main body, which is arranged further radially outwardly than the liquid ejection region of the impeller, a heating device operably connected to the diffusor and/or pressure chamber for heating the liquid, said heating device in particular comprising at least one, preferably axially extending, partial portion of an external defining wall of the diffusor and/or pressure chamber, with the axial outer casing of the main body of the diffusor in particular forming at least one, preferably axially extending, partial portion of an internal defining wall of the diffusor and/or pressure chamber, and a discharge port for ejecting the liquid.