公开(公告)号：US11909398B2

公开(公告)日：2024-02-20

申请号：US17993327

申请日：2022-11-23

申请人： Eppendorf SE

发明人： Uwe Beukert ,  Falk Binder

IPC分类号： G01R31/327 ,  H03K3/2893 ,  B01L7/00 ,  H01H43/02 ,  H03K17/06

CPC分类号： H03K3/2893 ,  B01L7/00 ,  G01R31/327 ,  H01H43/02 ,  H03K17/06 ,  B01L2300/1894

摘要： Laboratory equipment with flammable refrigerant and connected to at least two different electrical potentials for supplying the equipment with electrical energy. An electrical switch arrangement has first and second switches for electrical separation from, respectively, the first and second potentials. A sequence controller switches on the first switch and thereafter the second switch. A monitoring device is connected via a first contact on the equipment side to the first switch and via a second contact on the mains side to an electrical potential other than the first electrical potential for detecting a switched-on state of the first switch and signaling the detection to the sequence controller. When the monitoring device signals a switched-on state, the sequence controller blocks operation of the equipment as a function of the signaled switched-on state and whether the first switch is expected to be switched on or switched off.

公开(公告)号：US20230163752A1

公开(公告)日：2023-05-25

申请号：US17993327

申请日：2022-11-23

申请人： Eppendorf SE

发明人： Uwe Beukert ,  Falk Binder

IPC分类号： H03K3/2893 ,  B01L7/00 ,  G01R31/327 ,  H01H43/02 ,  H03K17/06

CPC分类号： H03K3/2893 ,  B01L7/00 ,  G01R31/327 ,  H01H43/02 ,  H03K17/06 ,  B01L2300/1894

摘要： The disclosure relates to laboratory equipment with flammable refrigerant and connected to at least two different electrical potentials for supplying the equipment with electrical energy. An electrical switch arrangement has first and second switches for electrical separation from, respectively, the first and second potentials. A sequence controller switches on the first switch and thereafter the second switch. A monitoring device is connected via a first contact on the equipment side to the first switch and via a second contact on the mains side to an electrical potential other than the first electrical potential for detecting a switched-on state of the first switch and signaling the detection to the sequence controller. When the monitoring device signals a switched-on state, the sequence controller blocks operation of the equipment as a function of the signaled switched-on state and whether the first switch is expected to be switched on or switched off.