公开(公告)号：US20240128483A1

公开(公告)日：2024-04-18

申请号：US18482858

申请日：2023-10-07

Applicant: CUMMINS INC. ,  HYDROGENICS CORPORATION

Inventor： Christopher NELSON ,  Bryn EPP ,  Nathaniel Ian JOOS

IPC: H01M8/04089 ,  F04D13/06 ,  F04D29/046 ,  F04D29/08 ,  F04D29/58 ,  H01M8/04007 ,  H01M8/04303 ,  H01M8/04701 ,  H01M8/04746 ,  H01M8/04955

CPC classification number: H01M8/04097 ,  F04D13/06 ,  F04D29/046 ,  F04D29/08 ,  F04D29/586 ,  H01M8/04007 ,  H01M8/04303 ,  H01M8/04708 ,  H01M8/04753 ,  H01M8/04955

Abstract: A recirculation pump includes an impeller, a pump motor assembly, and a heater. The pump motor assembly includes a pump housing having a pump cavity and a pump motor arranged in the pump cavity that drives the impeller, the pump housing arranged axially away from the impeller. The heater is disposed on or in the pump housing and spaced apart from the impeller. The heater is configured to increase a temperature of any portion of the fluid that leaks from the impeller into the pump cavity and resides in the pump cavity. The increase in the temperature causes the fluid that resides in the pump cavity to flow toward the impeller and exit the pump cavity.