Circulation pump assembly for a heating and/or cooling system

A hydraulic manifold and circulation pump assembly combination comprising:

• a circulation pump assembly comprising:
• an electric drive motor;
• at least one impeller;
• a pump housing connected to this drive motor, the at least one impeller being situated in the pump housing, the pump housing comprising a first inlet, an outlet and a second inlet which is connected in an inside of the pump housing at a mixing point to the first inlet;
• a regulating valve regulating a mixing ratio of two flows mixing at the mixing point, the regulating valve being arranged in the pump housing;
• and
• a control device controlling the regulating valve for regulating the mixing ratio;
• an electronics housing, wherein the control device is arranged in the electronics housing on the drive motor, wherein electronic components are arranged in the electronic housing for regulating the drive motor;
• at least one temperature sensor arranged in the inside of the pump housing and in or adjacent to a flow path through the pump housing, wherein the control device is signal-connected to the at least one temperature sensor, the at least one temperature sensor measuring a fluid temperature of fluid exiting the pump housing;
• at least another temperature sensor connected to the control device, the another temperature sensor measuring a return fluid temperature of a load circuit, the control device receiving the return fluid temperature as input, the control device controlling the regulating valve based on the fluid temperature and the return fluid temperature such that a difference between the return fluid temperature and the fluid temperature is maintained at a constant predetermined temperature;
• at least one load module connected to the pump housing, the at least one load module comprising a section of a feed conduit and/or a section of a return conduit, wherein the section of the feed conduit is connected to the first outlet of the pump housing and comprises a feed connection and the section of the return conduit is connected to the second inlet of the pump housing and comprises a return connection.

A circulation pump assembly for a heating and/or cooling system, the circulation pump assembly comprising:

• an electric drive motor;
• at least one impeller;
• a pump housing connected to the drive motor, the at least one impeller being arranged in the pump housing, the pump housing comprising a first inlet, a first outlet, a second outlet and a second inlet which is connected in an inside of the pump housing at a mixing point to the first inlet;
• a regulating valve regulating a mixing ratio of two flows mixing at the mixing point, the regulating valve being arranged in the pump housing;
• a control device;
• an electronics housing, wherein the control device is arranged in the electronics housing on the drive motor, wherein electronic components are arranged in the electronic housing, the electronic components being configured to control the drive motor and to control the regulating valve for regulating the mixing ratio, the first inlet and the first outlet defining a first flow path, the impeller being arranged in the first flow path, the second inlet being connected to the second outlet via a channel in the pump housing, the second outlet, the second inlet and the channel defining a second flow path, the first flow path being in fluid communication with the second flow path;
• a temperature sensor arranged in the inside of the pump housing, the temperature sensor being connected to the first flow path in the inside of the pump housing, the temperature sensor measuring a fluid temperature of fluid exiting the first outlet, the control device receiving the fluid temperature as input, the control device comparing the fluid temperature with a predetermined temperature, the control device controlling the regulating valve based on the fluid temperature such the temperature of the fluid exiting the first outlet is equal to the predetermined temperature;
• and
• another temperature sensor connected to the control device, the another temperature sensor measuring a return fluid temperature of a load circuit, the control device receiving the return fluid temperature as input, the control device controlling the regulating valve based on the fluid temperature and the return fluid temperature such that a difference between the return fluid temperature and the fluid temperature is maintained at a constant predetermined temperature.