초록 ▼

An electric fan has a drive motor having a fan rotor, an apparatus for generating a rotation speed signal (n_i), an apparatus for generating a power level signal (P_i) that represents power consumed; a first regulator (n_RGL) for regulating the rotation speed signal (n_i) to a predefined target valu

An electric fan has a drive motor having a fan rotor, an apparatus for generating a rotation speed signal (n_i), an apparatus for generating a power level signal (P_i) that represents power consumed; a first regulator (n_RGL) for regulating the rotation speed signal (n_i) to a predefined target value (n_s); a second regulator (P_RGL) for regulating the power level signal (P_i) to a predefined power level signal target value (P_s) that corresponds to a predefined minimum consumed power level (P_min), where the first regulator (n_RGL) and the second regulator (P_RGL) apply at least one control output signal (SW) to the drive motor and interact in such a way that, during operation, the at least one control value (SW) in a first state is determined by the first regulator (n_RGL), and in a second state is determined by the second regulator (n_RGL).

대표청구항 ▼

1. A fan comprising: a drive motor having a fan rotor;an apparatus for generating a rotation speed signal (n_i) that characterizes the rotation speed of the fan rotor,an apparatus for generating a power level signal (P_i) that characterizes the power level consumed by the drive motor;a first regulat

1. A fan comprising: a drive motor having a fan rotor;an apparatus for generating a rotation speed signal (n_i) that characterizes the rotation speed of the fan rotor,an apparatus for generating a power level signal (P_i) that characterizes the power level consumed by the drive motor;a first regulator (n_RGL) for regulating the rotation speed signal (n_i) to a predefined rotation speed target value (n_s);a second regulator (P_RGL) for regulating the power level signal (P_i) to a predefined power level signal target value (P_s) that corresponds to a predefined minimum consumed power level (P_min), where the first regulator (n_RGL) and the second regulator (P_RGL) output at least one control output signal (SW) to the drive motor and interact in such a way that, during operation, the value of said at least one control signal (SW) in a first state, is determined by the first regulator (n_RGL), andin a second state, is determined by the second regulator (n_RGL), and wherein a first changeover from the first state to the second state occurs, when a first condition, having at least one first criterion, pertains, where the first condition satisfies the criterion that the power level signal (P_i) corresponds to a consumed power level that is less than said minimum consumed power level (P_min), in order to influence the power level signal (P_i) applied to said motor of said fan, so that the power level signal corresponds to a consumed power level that is at least equal to the minimum consumed power level (P_min). 2. The fan according to claim 1, wherein the first condition satisfies a further criterion that the rotation speed signal (n_i) is at least as great as a predefined rotation speed, where the predefined rotation speed corresponds to the rotation speed target value (n_s). 3. The fan according to claim 1, wherein the fan has a characteristic curve for flow rate plotted versus power level;said characteristic curve exhibits a saddle region (76), andwherein a predefined minimum consumed power level (P_min), to be applied to said motor, is selected in such a way that the control output signal (SW), in the saddle region, is determined at least in part by the second regulator (P_RGL), and, outside the saddle region, is determined at least in part by the first regulator (n_RGL). 4. The fan according to claim 1, wherein the first regulator (n_RGL) and the second regulator (P_RGL) interact in such a way that after a first changeover, the second state is at least temporarily maintained, even when the instantaneous rotation speed is less than the rotation speed predefined by the first regulator (n_RGL). 5. The fan according to claim 4, wherein the first condition satisfies a further criterion that the rotation speed signal (n_i) is at least as great as a predefined rotation speed, where the predefined rotation speed corresponds to the rotation speed target value (n_s). 6. The fan according to claim 4, wherein the fan has a characteristic curve for flow rate plotted versus power level;said characteristic curve exhibits a saddle region (76), andwherein a predefined minimum consumed power level (P_min), to be applied to said motor, is selected in such a way that the control output signal (SW), in the saddle region, is determined at least in part by the second regulator (P_RGL), and, outside the saddle region, is determined at least in part by the first regulator (n_RGL). 7. The fan according to claim 4, further comprising rotation speed limiting apparatus (n_i