阅读说明：本技术 用于烹饪设备的电源电路以及烹饪设备 (Power supply circuit for cooking equipment and cooking equipment ) 是由 马西莫·赞戈利 马西莫·诺斯特罗 亚历克斯·维罗利 安德烈亚·罗西 恩里科·瓦伦蒂尼 埃马 于 2020-02-20 设计创作，主要内容包括：本发明涉及一种用于烹饪设备、特别是用于感应烹饪设备、更特别地是用于感应灶具(80)的电源电路(1,2),其中,该电源电路包括：-特别是单个频率调整单元(20)、特别是滤波单元,用于将至少一个外部供电信号(11,12)调整为单个或至少一个内部AC供电信号(15,16；17,18)；-以及至少一个、至少两个、两个、至少三个或三个DC信号生成单元(25,30,35),其各自用于将该一个或至少一个内部AC供电信号(15,16；17,18)转换为内部DC供电信号(40,41,42,43,44；45,46)的至少一个信号分量、特别是一个或两个信号分量；以及-至少一个、至少两个、特别是两个、至少三个、三个、至少四个或四个加热频率生成单元(50,55),其各自用于将由至少一个DC信号生成单元(25,30,35)供应的一个或至少一个DC供应信号(40,41；42,43；44,46；45,46)转换为用于为至少一个加热单元(70,75)供应电功率的加热频率信号(61,62,63,64)。(The invention relates to a power supply circuit (1, 2) for a cooking appliance, in particular for an induction cooking appliance, more particularly for an induction hob (80), wherein the power supply circuit comprises: -in particular a single frequency adjustment unit (20), in particular a filtering unit, for adjusting the at least one external supply signal (11, 12) to a single or at least one internal AC supply signal (15, 16; 17, 18); -and at least one, at least two, at least three or three DC signal generating units (25, 30, 35) each for converting the one or at least one internal AC supply signal (15, 16; 17, 18) into at least one signal component, in particular one or two signal components, of an internal DC supply signal (40, 41, 42, 43, 44; 45, 46); and-at least one, at least two, in particular two, at least three, at least four or four heating frequency generating units (50, 55), each for converting one or at least one DC supply signal (40, 41; 42, 43; 44, 46; 45, 46) supplied by the at least one DC signal generating unit (25, 30, 35) into a heating frequency signal (61, 62, 63, 64) for supplying the at least one heating unit (70, 75) with electrical power.)

1. A power supply circuit (1, 2) for a cooking appliance, in particular for an induction cooking appliance, more particularly for an induction hob (80),

wherein, this power supply circuit includes:

-in particular a single frequency adjustment unit (20), in particular a filtering unit, for adjusting at least one external supply signal (11, 12) to a single or at least one internal AC supply signal (15, 16; 17, 18),

-at least one, at least two, at least three or three DC-signal generating units (25, 30, 35) each for converting the one or at least one internal AC supply signal (15, 16; 17, 18) into at least one signal component, in particular one or two signal components, of an internal DC supply signal (40, 41, 42, 43, 44; 45, 46), and

-at least one, at least two, in particular two, at least three, at least four or four heating frequency generating units (50, 55), each for converting one or at least one DC supply signal (40, 41; 42, 43; 44, 46; 45, 46) supplied by at least one DC signal generating unit (25, 30, 35) into a heating frequency signal (61, 62, 63, 64) for supplying at least one heating unit (70, 75) with electrical power.

2. A power supply circuit as claimed in claim 1, wherein each signal is supplied by a first signal component and a second signal component, and/or

Wherein the first signal component (40, 42) of each DC signal generating unit (25, 30, 35) supplies a DC voltage and the second signal component supplies a ground voltage, wherein preferably each DC signal generating unit (25, 30, 35) is connected to the same common ground voltage GND.

3. Power supply circuit according to one of the preceding claims, wherein the power supply circuit (1, 2) comprises a single internal AC supply signal (15, 16; 17, 18), and/or

Wherein the or an internal AC supply signal (15, 16; 17, 18) supplies one, at least one, two, at least two or at least three DC signal generating units (25, 30, 35) with electrical power.

4. Power supply circuit according to one of the preceding claims, wherein each DC supply signal (40, 41; 42, 43; 44, 45; 45, 46) constitutes a DC bus, wherein the power supply circuit comprises in particular two or at least two DC buses, and/or

Wherein each DC supply signal (40, 41; 42, 43; 44, 45; 45, 46) supplies one, at least one, two, at least two or at least three heating frequency generating units (50, 55) with electrical power and/or

Wherein the first DC supply signal (40, 41; 44, 46) supplies one, at least one, two, at least two or at least three heating frequency generating units (50) with electrical power and the second DC supply signal (42, 43; 45, 46) supplies one, at least one, two, at least two or at least three heating frequency generating units (55) with electrical power and/or

Wherein the power supply circuit (1, 2) comprises a number N of DC buses, wherein N >1, wherein in particular N-2 or N-3, wherein in particular each DC bus supplies a group of heating frequency generating units (55) with electrical power.

5. Power supply circuit according to one of the preceding claims, wherein each heating frequency signal (61, 62, 63, 64) comprises a frequency of at least 10kHZ, in particular at least 25kHz, and/or a frequency of less than 100kHZ, and/or

Wherein the heating power generated by the heating unit can be changed by changing the frequency of the heating frequency signal.

6. Power supply circuit of one of the preceding claims, wherein the frequency adjustment unit (20) comprises a frequency filter circuit, in particular a low-pass filter circuit, an RC filter circuit and/or an LC filter circuit.

7. Power supply circuit according to one of the preceding claims, wherein the DC signal generating units (25, 30, 35) are rectifiers, in particular bridge rectifiers and/or diode rectifiers and/or AC/DC converters, and/or

Wherein the DC signal generating units (25, 30, 35) are half-bridge rectifiers, in particular half-bridge diode rectifiers, more in particular having only two diodes and/or having only one output, and/or

Wherein each DC signal generating unit (25, 30, 35) comprises only a single DC output, each for supplying one signal component to at least one heating frequency generating unit.

8. Power supply circuit according to one of the preceding claims, wherein the DC output (28) of the first DC signal generating unit (25) is connected to a first DC input (51) of the first heating frequency generating unit (50) and the DC output (38) of the second DC signal generating unit (35) is connected to a second DC input (52) of the first heating frequency generating unit (50) and/or

Wherein the DC output (33) of the third DC-signal generating unit (30) is connected to the first DC input (56) of the second heating-frequency generating unit (55) and the DC output (38) of the second DC-signal generating unit (35) is connected to the second DC input (57) of the second heating-frequency generating unit (55).

9. Power supply circuit according to one of the preceding claims, wherein each heating frequency generating unit (50, 55) comprises two DC inputs (51, 52; 56, 57) each for supplying one signal component from one or at least one DC signal generating unit (25, 30, 35) and/or

Wherein each heating frequency generating unit (50, 55) comprises at least one electrical switch, in particular at least one relay and/or at least one electronic switch, in particular at least one semiconductor switch, more in particular at least one insulated gate bipolar transistor, IGBT, and/or

Wherein each heating frequency generating unit (50, 55) comprises at least one half-bridge circuit and/or at least one quasi-resonant circuit for generating the heating frequency signal.

10. Power supply circuit according to one of the preceding claims, wherein the power supply circuit (1, 2) is implemented on a single board (95), in particular on a single power board or printed circuit board PCB.

11. Power supply circuit according to one of the preceding claims, wherein the power supply circuit (1, 2) interacts with a control unit (90) and/or at least one user interface (85), in particular on the printed circuit board (95), in particular via a communication bus, and/or

Wherein the control unit (90) comprises a frequency control unit (91) for controlling the heating frequencies of the heating frequency generation units (50, 55), in particular independently, and/or

Wherein the frequency control unit (91) comprises an interference control unit (92) for controlling interference between the heating frequency generating units (50, 55), in particular between the heating frequency generating units (50, 55) supplied by a single DC bus, and/or

Wherein the interference control unit (92) comprises at least one of a noise reduction unit (93) for reducing noise of interference originating from different heating frequency generating units (50, 55) and/or an anti-interference unit (94) for reducing parasitic effects of electromagnetic interference originating from different heating frequency generating units (50, 55), in particular heating frequency generating units (50, 55) supplied by a single DC bus, and/or

Wherein the noise reduction unit (93) comprises means for shifting a frequency difference between the frequencies of the heating frequency signals of the first and second heating frequency generation units (50, 55) to a frequency difference outside an audible range, in particular by switching at least one frequency to a first frequency, wherein the frequency difference is lower than the audible range, or by switching at least one frequency to a second frequency, wherein the frequency difference is higher than the audible range, wherein in particular the first and second heating frequency generation units (50, 55) establish a set of heating frequency generation units connected to the same DC bus.

12. Power supply circuit according to one of the preceding claims, wherein the accumulated maximum power of the at least two, at least three or three DC signal generating units (25, 30, 35) is larger than the maximum power of the frequency adjusting unit (20) and/or

Wherein the external supply signal (10) is an AC voltage signal, in particular a one-phase AC voltage signal, preferably having a voltage of 220V to 250V.

13. Cooking appliance, in particular hob, more particularly induction hob with one, at least one, two, at least two or three power supply circuits according to one of the preceding claims.

14. Cooking apparatus according to claim 13, wherein the cooking hob comprises at least one control unit (90) and/or at least one user interface (95), and/or

Wherein the cooking hob comprises at least four, in particular at least six, at least eight or at least twelve heating units (70, 75), wherein each heating unit preferably comprises at least one inductor, more preferably at least one coil, and/or

Wherein the coils (81, 82) are shaped in the form of a triangle or circle, wherein in particular two and/or four triangular shaped coils are arranged as a square.

15. Cooking apparatus according to claim 13 or 14, wherein the cooking hob comprises two or three power supply circuits, wherein each power supply circuit is arranged on a separate distribution board and/or each power supply circuit is supplied by a 2-phase or three-phase power supply of a different voltage phase.