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1. 发明授权

US11277890B2 Microwave heating apparatus and method of operating such a microwave heating apparatus 有权
公开(公告)号：US11277890B2
公开(公告)日：2022-03-15
申请号：US15919400
申请日：2018-03-13
申请人： Whirlpool Corporation
发明人： Olle Niklasson , Hakan Carlsson , Ulf Nordh , Fredrik Hallgren
IPC分类号： H05B6/70 , H05B6/68 , H05B6/72
摘要： A microwave heating apparatus and a method of operating a microwave heating apparatus are provided. The microwave heating apparatus comprises a load receiving cavity, at least one microwave source, a plurality of feeding ports connected to the microwave source and the cavity for feeding microwaves to the cavity, a measuring unit and a control unit. The measuring unit measures, for at least one frequency or within a frequency range, the power of microwaves reflected back to the microwave source for at least part of the plurality of feeding ports. The control unit selects at least one of the feeding ports based on the measured powers of the reflected microwaves in order to feed microwaves to the cavity via the at least one selected feeding port during operation of the microwave heating apparatus at the at least one frequency or within the frequency range.

2. 发明授权

US10064247B2 Methods of controlling cooling in a microwave heating apparatus and apparatus thereof 有权
公开(公告)号：US10064247B2
公开(公告)日：2018-08-28
申请号：US14845594
申请日：2015-09-04
申请人： WHIRLPOOL CORPORATION
发明人： Ulf Nordh , Hakan Carlsson , Olle Niklasson , Fredrik Hallgren
IPC分类号： H05B6/64 , H05B6/66 , H05B6/68
CPC分类号： H05B6/642 , H05B6/666 , H05B6/68
摘要： A microwave heating apparatus and methods of controlling cooling of a microwave heating apparatus are provided. The microwave heating apparatus typically includes a microwave source for generating microwaves, a cooling unit for cooling the microwave source and a control unit. According to one embodiment, the control unit is configured to determine the efficiency of the microwave source and then to control the cooling based on the determined efficiency. The methods and the microwave heating apparatuses of the present invention are advantageous with respect to energy consumption.

3. 发明授权

US11464085B2 Microwave heating apparatus 有权
公开(公告)号：US11464085B2
公开(公告)日：2022-10-04
申请号：US16534410
申请日：2019-08-07
申请人： WHIRLPOOL CORPORATION
发明人： Hakan Carlsson , Ulf Nordh
IPC分类号： H05B6/68 , H05B6/64 , H05B6/70 , H05B6/66
摘要： An apparatus and a method for heating a load using microwaves is disclosed. The apparatus includes a transmission line, configured to transmit microwaves from a microwave generator to a cavity. A sensing device configured to measure a standing wave for providing information about the phase and the amplitude of a reflection coefficient that represents a ratio between the amount of microwaves reflected back towards the microwave generator and the amount of microwaves transmitted in the transmission line from the microwave generator. A control unit configured to detect whether the measured standing wave correspond to a reflection coefficient having a phase within a certain interval of phases and an amplitude within a certain interval of amplitudes. Additionally, certain intervals of phases and amplitudes correspond to an operating region of the microwave generator. The control unit controls feeding of microwaves to the cavity based on this detection.

4. 发明授权

US10820383B2 Control of microwave source efficiency in a microwave heating apparatus 有权
公开(公告)号：US10820383B2
公开(公告)日：2020-10-27
申请号：US15862890
申请日：2018-01-05
申请人： WHIRLPOOL CORPORATION
发明人： Ulf Nordh , Hakan Carlsson , Olle Niklasson , Fredrik Hallgren
IPC分类号： H05B6/64 , H05B6/68 , H05H1/46 , H05B6/70
摘要： A method and apparatus for operating a microwave heating apparatus includes a microwave source adapted to feed microwaves to a cavity via a transmission line, including measuring a power of microwaves transmitted from the microwave source to the cavity, receiving operational data indicative of the power supplied to the microwave source, and adjusting at least one of an impedance of the transmission line or the impedance matching between the microwave source and the transmission line based on the measured power of the transmitted microwaves and the received operational data.

5. 发明申请

US20210136882A1 METHODS OF CONTROLLING COOLING IN A MICROWAVE HEATING APPARATUS AND APPARATUS THEREOF 有权
公开(公告)号：US20210136882A1
公开(公告)日：2021-05-06
申请号：US17145560
申请日：2021-01-11
申请人： WHIRLPOOL CORPORATION
发明人： Ulf Nordh , Hakan Carlsson , Olle Niklasson , Fredrik Hallgren
IPC分类号： H05B6/64 , H05B6/66 , H05B6/68
摘要： A microwave heating apparatus and methods of controlling cooling of a microwave heating apparatus are provided. The microwave heating apparatus typically includes a microwave source for generating microwaves, a cooling unit for cooling the microwave source and a control unit. According to one embodiment, the control unit is configured to receive operational data from a measuring device indicative of the measured power of microwaves transmitted from the magnetron and receive operational data from the measuring device indicative of the measured anode current of the magnetron. A calculating device calculates an efficiency of the magnetron as a function of the measured power of the transmitted microwaves and the measured anode current, to define a determined efficiency. The control unit controls the cooling unit and cools the magnetron based on the determined efficiency.

6. 发明授权

US09769884B2 Versatile microwave heating apparatus 有权
公开(公告)号：US09769884B2
公开(公告)日：2017-09-19
申请号：US15139629
申请日：2016-04-27
申请人： WHIRLPOOL CORPORATION
发明人： Olle Niklasson , Hakan Carlsson , Ulf Nordh , Fredrik Hallgren
IPC分类号： H05B6/66 , H05B6/68 , H05B6/64
CPC分类号： H05B6/6482 , H05B6/6402 , H05B6/6447 , H05B6/6494 , H05B2206/044
摘要： A microwave heating apparatus for heating a load by means of microwaves is provided. The microwave heating apparatus comprises a cavity arranged to receive a piece of food to be heated, a first microwave supply system configured to supply microwaves at the cavity bottom for energizing a browning function in the cavity, a second microwave supply system configured to supply microwaves into the cavity for exciting cavity modes and a control unit configured to control the first and second microwave supply systems based on a food category and/or a cooking program. The first supply system comprises at least one microwave source and at least one antenna arranged in a lower part of the cavity and the second microwave supply system comprises at least one microwave source and at least one feeding port arranged in an upper part of the cavity. The present invention is advantageous in that a microwave heating apparatus with an improved crisp function is provided.

7. 发明授权

US09717116B2 Microwave oven and related method 有权
公开(公告)号：US09717116B2
公开(公告)日：2017-07-25
申请号：US14021421
申请日：2013-09-09
申请人： Whirlpool Corporation
发明人： Ollie Niklasson , Ulf Nordh , Fredrik Hallgren , Hakan Carlsson
IPC分类号： H05B6/64 , H05B6/68 , H05B6/70
CPC分类号： H05B6/686 , H05B6/6488 , H05B6/688 , H05B6/705 , Y02B40/143 , Y02B40/146
摘要： A method of operating a microwave oven and a microwave oven are disclosed. The microwave oven comprises a magnetron for providing microwave power to heat a load placed in the microwave oven, and a solid-state microwave generator for providing microwave power to sense presence and/or determine nature of the load in the microwave oven.

8. 发明授权

US09363852B2 Microwave heating apparatus 有权
标题翻译：微波加热装置
公开(公告)号：US09363852B2
公开(公告)日：2016-06-07
申请号：US13920408
申请日：2013-06-18
申请人： Whirlpool Corporation
发明人： Hakan Carlsson , Nordh Ulf
IPC分类号： H05B6/46 , H05B6/64 , H01P5/04 , H05B6/68 , H05B6/70
CPC分类号： H05B6/682 , H05B6/6447 , H05B6/664 , H05B6/666 , H05B6/68 , H05B6/705
摘要： An apparatus and a method for heating a load using microwaves is disclosed. The apparatus includes a transmission line, configured to transmit microwaves from a microwave generator to a cavity. A sensing device configured to measure electromagnetic field strengths for providing information about the phase and the amplitude of a reflection coefficient that represents a ratio between the amount of microwaves reflected back towards the microwave generator and the amount of microwaves transmitted in the transmission line from the microwave generator. A control unit configured to detect whether the measured electromagnetic field strengths correspond to a reflection coefficient having a phase within a certain interval of phases and an amplitude within a certain interval of amplitudes. Additionally, certain intervals of phases and amplitudes correspond to an operating region of the microwave generator. The control unit controls feeding of microwaves to the cavity based on this detection.
摘要翻译：公开了一种使用微波加热负载的装置和方法。该装置包括传输线，其被配置为将微波从微波发生器传送到空腔。一种感测装置，被配置为测量电磁场强度，用于提供关于反射系数的相位和幅度的信息，该反射系数表示微波发生器反射的微波量与从微波传输线传输的微波的比率发电机。控制单元，被配置为检测所测量的电磁场强度是否对应于具有一定相位间隔内的相位的反射系数以及幅度的一定幅度内的振幅。此外，相位和幅度的某些间隔对应于微波发生器的工作区域。基于该检测，控制单元控制微波进入空腔。

9. 发明授权

US10390387B2 Microwave heating apparatus 有权
公开(公告)号：US10390387B2
公开(公告)日：2019-08-20
申请号：US15137305
申请日：2016-04-25
申请人： WHIRLPOOL CORPORATION
发明人： Hakan Carlsson , Ulf Nordh
IPC分类号： H05B6/64 , H05B6/68 , H05B6/70 , H05B6/66
摘要： An apparatus and a method for heating a load using microwaves is disclosed. The apparatus includes a transmission line, configured to transmit microwaves from a microwave generator to a cavity. A sensing device configured to measure electromagnetic field strengths for providing information about the phase and the amplitude of a reflection coefficient that represents a ratio between the amount of microwaves reflected back towards the microwave generator and the amount of microwaves transmitted in the transmission line from the microwave generator. A control unit configured to detect whether the measured electromagnetic field strengths correspond to a reflection coefficient having a phase within a certain interval of phases and an amplitude within a certain interval of amplitudes. Additionally, certain intervals of phases and amplitudes correspond to an operating region of the microwave generator. The control unit controls feeding of microwaves to the cavity based on this detection.

10. 发明申请

US20170105252A1 MICROWAVE HEATING APPARATUS WITH ROTATABLE ANTENNA AND METHOD THEREOF 审中-公开
公开(公告)号：US20170105252A1
公开(公告)日：2017-04-13
申请号：US15388177
申请日：2016-12-22
申请人： WHIRLPOOL CORPORATION
发明人： Ulf Nordh , Hakan Carlsson , Olle Niklasson , Fredrik Hallgren
IPC分类号： H05B6/72 , H05B6/64
CPC分类号： H05B6/725 , H05B6/6494
摘要： A microwave heating apparatus and a method for heating/browning a piece of food by means of microwaves are provided. The microwave heating apparatus comprises a cavity arranged to receive, in a substantially horizontal browning region, a piece of food to be browned. The microwave heating apparatus further comprises a microwave source for generating microwaves and a rotatable antenna arranged at the cavity bottom for supplying the generated microwaves. The antenna is configured to produce at least one radiating lobe pointing towards the browning region such that the intersection between the radiating lobe and the browning region forms a hot spot, thereby forming a ring-shaped heating pattern in the browning region under rotation of the antenna. The present invention is advantageous in that a microwave heating apparatus with an improved crisp function is provided.

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