Abstract: A heating installation (1) comprising: a first circuit (C1) containing a medium; a first heat pump (5) for heating a medium by absorbing heat energy from the medium in the first circuit; a thermal energy store (2) connected to the first circuit in order to allow heat exchange between the thermal energy store and the medium in the first circuit; a second circuit (C2) containing a medium; a second heat pump (10) for heating a medium by absorbing heat energy from the medium in the second circuit; a cooling circuit (CC) containing a medium; a first heat exchanger (8) for transferring heat from the medium in the cooling circuit (CC) to the medium in the first circuit (C1); and a second heat exchanger (9) for transferring heat from the medium in the cooling circuit (CC) to the medium in the second circuit (C2).

Abstract: A heating installation comprising: a first circuit (C1); a second circuit (C2); a first heat pump (4) for heating the medium in the first circuit; a heat exchanger (10) which is arranged in the second circuit and connected between a condenser (4b) and an expansion valve (4d) of the first heat pump; a second heat pump (11) arranged for heating a medium by absorbing heat energy from the medium in the second circuit; and a first and a second accumulator tank (A1, A2) arranged in series in the second circuit for accumulating the medium in the second circuit. The accumulator tanks are alternately connectable to the second heat pump in order to allow medium to circulate between the first accumulator tank and the evaporator of the second heat pump in a first operating situation and allow medium to circulate between the second accumulator tank and the evaporator of the second heat pump in a second operating situation.

Abstract: A heating installation comprising: a first circuit (C1); a second circuit (C2); a first heat pump (4) for heating the medium in the first circuit; a heat exchanger (10) which is arranged in the second circuit and connected between a condenser (4b) and an expansion valve (4d) of the first heat pump; second and third heat pumps (11, 13) arranged for heating a medium by absorbing heat energy from the medium in the second circuit; and an accumulator tank (12) arranged in the second circuit downstream of the second heat pump (11). The accumulator tank is connected to an evaporator (13a) of the third heat pump (13) in order to allow medium to circulate between the accumulator tank and this evaporator so that heat exchange between the medium in the second circuit and a working medium of the third heat pump is possible via the evaporator of the third heat pump.

Abstract: A heating installation comprising: —a first circuit (C1); —a second circuit (C2); —a first heat pump (4) for heating the medium in the first circuit; —a first heat exchanger (10) arranged in the second circuit (C2) and connected between a condenser (4b) and an expansion valve (4d) of the first heat pump; —a second heat pump (11) arranged for heating a medium by absorbing heat energy from the medium in the second circuit; and —a second heat exchanger (12) and a third heat exchanger (14) for transferring heat from the medium in the second circuit to water in a water supply line (13). The second heat exchanger (12) is connected to the water supply line upstream of the third heat exchanger (14) in order to allow the second heat exchanger to preheat the tap hot-water in a first step and the third heat exchanger to preheat the tap hot-water in a subsequent second step.

Abstract: A heating installation comprising: a first circuit (C1); a second circuit (C2); a first heat pump (4) for heating the medium in the first circuit; a heat exchanger (10) which is arranged in the second circuit and connected between a condenser (4b) and an expansion valve (4d) of the first heat pump; a second heat pump (11) arranged for heating a medium by absorbing heat energy from the medium in the second circuit; and a first and a second accumulator tank (A1, A2) arranged in series in the second circuit for accumulating the medium in the second circuit. The accumulator tanks are alternately connectable to the second heat pump in order to allow medium to circulate between the first accumulator tank and the evaporator of the second heat pump in a first operating situation and allow medium to circulate between the second accumulator tank and the evaporator of the second heat pump in a second operating situation.

Abstract: A heating installation comprising: a first circuit (C1); a second circuit (C2); a first heat pump (4) for heating the medium in the first circuit; a heat exchanger (10) which is arranged in the second circuit and connected between a condenser (4b) and an expansion valve (4d) of the first heat pump; second and third heat pumps (11, 13) arranged for heating a medium by absorbing heat energy from the medium in the second circuit; and an accumulator tank (12) arranged in the second circuit downstream of the second heat pump (11). The accumulator tank is connected to an evaporator (13a) of the third heat pump (13) in order to allow medium to circulate between the accumulator tank and this evaporator so that heat exchange between the medium in the second circuit and a working medium of the third heat pump is possible via the evaporator of the third heat pump.

Abstract: A heating installation comprising : a first circuit (C1); a second circuit (C2); a first heat pump (4) for heating the medium in the first circuit; a first heat exchanger (10) arranged in the second circuit (C2) and connected between a condenser (4b) and an expansion valve (4d) of the first heat pump; a second heat pump (11) arranged for heating a medium by absorbing heat energy from the medium in the second circuit; and a second heat exchanger (12) and a third heat exchanger (14) for transferring heat from the medium in the second circuit to water in a water supply line (13). The second heat exchanger (12) is connected to the water supply line upstream of the third heat exchanger (14) in order to allow the second heat exchanger to preheat the tap hot-water in a first step and the third heat exchanger to preheat the tap hot-water in a subsequent second step.

Abstract: A heating installation is provided with a first circuit (K1) containing a first medium, a second circuit (K2) containing a second medium, a first heat pump (2) arranged in the first circuit (K1) for heating the first medium, a third circuit (K3) containing a third medium, a heat exchanger (40) arranged in the third circuit (K3) and connected between the condenser (2d) and expansion valve (2f) of the first heat pump to transfer heat from the working medium of the first heat pump to the third medium in the third circuit (K3), and a second heat pump (3) arranged for heating the second medium in the second circuit (K2) by absorbing heat energy from the third medium in the third circuit (K3).

Abstract: A heating installation is provided with a first circuit (K1) containing a first medium, a second circuit (K2) containing a second medium, a first heat pump (2) arranged in the first circuit (K1) for heating the first medium, a third circuit (K3) containing a third medium, a heat exchanger (40) arranged in the third circuit (K3) and connected between the condenser (2d) and expansion valve (2f) of the first heat pump to transfer heat from the working medium of the first heat pump to the third medium in the third circuit (K3), and a second heat pump (3) arranged for heating the second medium in the second circuit (K2) by absorbing heat energy from the third medium in the third circuit (K3).

Abstract: A control device for electric motors and a method for monitoring the serviceability of a transmission part arranged for transmission of torque between an electric motor and a load during operation. The method comprises the steps of initiating at least one test sequence, and sending a signal indicating an error if said at least one test sequence indicates that the serviceability of the transmission part is not acceptable and if no further test sequences are to be performed. Additionally, said at least one test sequence includes the steps of setting a rotation speed of the electric motor at a test rotation speed, which differs from the rotation speed of the electric motor immediately prior to said setting, and measuring at the electric motor, within a period starting from the setting of the rotation speed of the motor and ending when the rotation speed of the electric motor has reached the test rotation speed.

Abstract: The invention is related to a climate control installation, comprising a first circuit (11) containing a first medium, a second circuit (12) containing a second medium and a first connection between the first circuit (11) and the second circuit (12) in the form of a heat pump (1), the input side of which being connected to the first circuit and the output side of which being connected to the second circuit. The heat pump (1) is adapted to, during circulation of the first medium and the second medium in their respective circuits (11, 12), absorb heat energy from the first medium on its input side and emit heat energy to the second medium on its output sidle. The first circuit comprises at least one first member (21) for transferring heat energy between the first medium and a third medium.

Abstract: A control device for electric motors and a method for monitoring the serviceability of a transmission part arranged for transmission of torque between an electric motor and a load during operation. The method comprises the steps of initiating at least one test sequence, and sending a signal indicating an error if said at least one test sequence indicates that the serviceability of the transmission part is not acceptable and if no further test sequences are to be performed. Additionally, said at least one test sequence includes the steps of setting a rotation speed of the electric motor at a test rotation speed, which differs from the rotation speed of the electric motor immediately prior to said setting, and measuring at the electric motor, within a period starting from the setting of the rotation speed of the motor and ending when the rotation speed of the electric motor has reached the test rotation speed.

Abstract: A control circuit for a reluctance machine having two mutually movable parts and at least one inductive phase winding adapted for a certain maximum drive current value. The method includes detecting when a phase winding is in a non-drive mode; causing a test current, having a second maximum value lower than said certain maximum value, to flow through the phase winding and through a current sensor when the winding is in the non-drive mode; and establishing a mutual position in dependence of the output of said current sensor.