公开(公告)号：US10750576B2

公开(公告)日：2020-08-18

申请号：US15541396

申请日：2015-01-30

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. ,  Emilio Lopez Matos ,  Jose Ma. Rio Doval ,  Fernando Bayona Alcolea

Inventor： Emilio Lopez Matos ,  Jose Ma. Rio Doval ,  Fernando Bayona Alcolea

IPC: H05B1/02 ,  G03G15/20 ,  G03G15/00 ,  H05B3/00 ,  H02M1/42

Abstract: The present subject matter describes a heating unit. The heating unit comprises a heating element and a controlling unit coupled to the heating element to determine a desired value of a direct current (DC) voltage based on heating element parameters. The desired value is a value of DC voltage desired for operation of the heating element. The controlling unit computes a value of a duty cycle parameter based on device input parameters and the desired value of the DC voltage. The heating unit further comprises a power factor correction (PFC) unit coupled to the controlling unit and the heating element to convert an input alternating current (AC) voltage, received by the PFC unit from an AC supply, to a direct current (DC) voltage of the desired value based on the duty cycle parameter. The PFC unit provides the DC voltage to the heating element.

公开(公告)号：US20180027611A1

公开(公告)日：2018-01-25

申请号：US15541396

申请日：2015-01-30

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Emilio Lopez Matos ,  Jose Ma. Rio Doval ,  Fernando Bayona Alcolea

IPC: H05B1/02 ,  H02M1/42 ,  G03G15/00 ,  H05B3/00 ,  G03G15/20

CPC classification number: H05B1/0241 ,  G03G15/2039 ,  G03G15/80 ,  H02M1/4225 ,  H05B3/0066 ,  H05B2203/014 ,  Y02B70/126

Abstract: The present subject matter describes a heating unit. The heating unit comprises a heating element and a controlling unit coupled to the heating element to determine a desired value of a direct current (DC) voltage based on heating element parameters. The desired value is a value of DC voltage desired for operation of the heating element. The controlling unit computes a value of a duty cycle parameter based on device input parameters and the desired value of the DC voltage. The heating unit further comprises a power factor correction (PFC) unit coupled to the controlling unit and the heating element to convert an input alternating current (AC) voltage, received by the PFC unit from an AC supply, to a direct current (DC) voltage of the desired value based on the duty cycle parameter. The PFC unit provides the DC voltage to the heating element.

公开(公告)号：US10352319B2

公开(公告)日：2019-07-16

申请号：US15540884

申请日：2015-01-29

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Bhishma Hernandez Martinez ,  Michel Georges Encrenaz ,  Fernando Bayona Alcolea

IPC: B41J2/175 ,  F04B1/00 ,  F04B51/00 ,  F04B13/00 ,  F04B49/06 ,  B41F33/00 ,  F04B49/20 ,  F04B43/02

Abstract: A pump for the transfer a predetermined total volume of fluid from a pump inlet to a pump outlet in a unit of time is calibrated by deriving a count of the number of times a volume of the fluid is transferred from a pump inlet to a pump outlet in a unit of time; and adjusting the number of times the volume is transferred in a unit of time until the derived count is substantially equal to a predetermined threshold value.

公开(公告)号：US09982680B2

公开(公告)日：2018-05-29

申请号：US15029934

申请日：2013-10-23

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Pedro Miguel Teixido Rovira ,  Santiago Sanz Ananos ,  Fernando Bayona Alcolea

IPC: G01P3/56 ,  F04D27/00 ,  F04D29/58 ,  G01R17/00 ,  G01R31/04

CPC classification number: F04D27/001 ,  F04D29/582 ,  G01R17/00 ,  G01R31/045

Abstract: Inputting an input resistance to an operational amplifier. Detecting whether a number of fans are in operation based on the input resistance to the operational amplifier by driving a number of resistors connected in series in a fan circuit associated with the number of fans.

公开(公告)号：US20180010599A1

公开(公告)日：2018-01-11

申请号：US15540884

申请日：2015-01-29

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Bhishma Hernandez Martinez ,  Michel Georges Encrenaz ,  Fernando Bayona Alcolea

IPC: F04B51/00 ,  B41F33/00 ,  F04B49/20 ,  F04B49/06 ,  F04B43/02

CPC classification number: F04B51/00 ,  B41F33/00 ,  B41J2/175 ,  B41J2/17596 ,  F04B13/00 ,  F04B43/02 ,  F04B49/065 ,  F04B49/20 ,  F04B2205/04 ,  F04B2205/05

Abstract: A pump for the transfer a predetermined total volume of fluid from a pump inlet to a pump outlet in a unit of time is calibrated by deriving a count of the number of times a volume of the fluid is transferred from a pump inlet to a pump outlet in a unit of time; and adjusting the number of times the volume is transferred in a unit of time until the derived count is substantially equal to a predetermined threshold value.

公开(公告)号：US20160258437A1

公开(公告)日：2016-09-08

申请号：US15029934

申请日：2013-10-23

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Pedro Miguel Teixido Rovira ,  Santiago Sanz Ananos ,  Fernando Bayona Alcolea

IPC: F04D27/00 ,  G01R17/00 ,  F04D29/58

CPC classification number: F04D27/001 ,  F04D29/582 ,  G01R17/00 ,  G01R31/045

Abstract: Inputting an input resistance to an operational amplifier. Detecting whether a number of fans are in operation based on the input resistance to the operational amplifier by driving a number of resistors connected in series in a fan circuit associated with the number of fans.

Abstract translation: 输入运算放大器的输入电阻。 通过驱动与风扇数量相关联的风扇电路中串联连接的多个电阻来检测是否基于对运算放大器的输入电阻来操作多个风扇。