Circulation pump assembly
AssigneeGrundfos Holding A/S
InventorsThomas Blad, Christian Blad
Life of this patent
Estimating the term…
Abstract
A circulation pump assembly includes a first inlet (84), an outlet (80), an electric drive motor (30) and at least one impeller (68; 100) driven by the drive motor (30). The circulation pump assembly has at least one first flow path (26; 48) positioned in a connection between the first inlet (84) and the outlet (80) for increasing the pressure of a fluid. The circulation pump assembly has a second inlet (86). The at least one impeller (68; 100) has at least one second flow path (28; 50) for increasing the pressure of a fluid, which is positioned in a connection of the second inlet (86) to the outlet (80). A heating system is provided having a circulation pump assembly of this type.
Claims20
A circulation pump assembly comprising:
- a first inlet;
- a second inlet;
- an outlet;
- an electrical drive motor;
- an impeller arrangement which is driven by the drive motor;
- and which comprises at least one first flow path for increasing a pressure of a fluid and which is situated in a connection between the first inlet and the outlet and the impeller arrangement comprises at least one second flow path which is for increasing a pressure of a fluid and which is situated in a connection from the second inlet to the outlet, wherein the at least one first flow path and the at least one second flow path, are formed in a common impeller as the impeller arrangement, or are formed in at least two impellers as the impeller arrangement, which two impellers are arranged rotationally fixed to one another;
- a control device configured to regulate a temperature at the outlet side of the pump assembly by adjusting a speed of the drive motor, dependent on a temperature signal detected at the outlet of the pump assembly.
A heating system comprising:
- a first circulation pump assembly comprising a first inlet, a second inlet, an outlet, an electrical drive motor, and
- an impeller arrangement which is driven by the drive motor and which comprises at least one first flow path for increasing a pressure of a fluid and which is situated in a connection between the first inlet and the outlet and the impeller arrangement comprises at least one second flow path which is for increasing a pressure of a fluid and which is situated in a connection from the second inlet to the outlet, wherein the at least one first flow path and the at least one second flow path, are formed in a common impeller as the impeller arrangement, or are formed in at least two impellers as the impeller arrangement, which two impellers are arranged rotationally fixed to one another, the first circulation pump assembly further comprising a control device configured to regulate a temperature at the outlet side of the pump assembly by adjusting a speed of the drive motor, dependent on a temperature signal detected at the outlet of the pump assembly;
- and
- a second circulation pump assembly which is situated upstream of the second inlet of the first circulation pump assembly.
A circulation pump assembly comprising:
- a first inlet;
- a second inlet;
- an outlet;
- a temperature sensor configured to provide a temperature sensor signal based on a temperature at the outlet;
- an electrical drive motor;
- an impeller arrangement which is driven by the drive motor, the impeller arrangement comprising at least one first flow path for increasing a pressure of a fluid and which is situated in a connection between the first inlet and the outlet and the impeller arrangement comprises at least one second flow path which is for increasing a pressure of a fluid and which is situated in a connection from the second inlet to the outlet, wherein the at least one first flow path and the at least one second flow path, are formed in a common impeller as the impeller arrangement, or are formed in at least two impellers as the impeller arrangement, which two impellers are arranged on a shaft such that the two impellers are configured to rotate based on rotation of the shaft;
- a control device configured to receive the temperature signal as input and to regulate a temperature at the outlet side of the pump assembly by adjusting a speed of the drive motor based on the temperature signal.
Dependencies are inferred from the claim text.