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Radio communicating device and microwave oven using same

A technology of a wireless communication device and a microwave oven, applied in the field of microwave ovens, can solve the problems of inability to guarantee communication time and the like

Inactive Publication Date: 2006-09-20
TOSHIBA LIFESTYLE PROD & SERVICES CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, in Figure 4 Communication time is not guaranteed during the envelope of the magnetron current

Method used

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  • Radio communicating device and microwave oven using same
  • Radio communicating device and microwave oven using same
  • Radio communicating device and microwave oven using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] figure 1 The structure of a microwave oven having a wireless communication device according to Embodiment 1 of the present invention is shown. The microwave oven 1 has a metal cabinet 2 containing a cooking chamber 3 . The cooking chamber 3 receives food 4 to be cooked by electromagnetic induction. For this purpose, the mechanical chamber 5 in the microwave oven 1 has a magnetron 7 to generate microwaves 6 in high frequency bands of 2.5GHZ and 2.4GHZ, and a controller (not shown). The microwave oven 1 accommodates the communication device 8 and is covered with a metal case that blocks radio waves. The communication device 8 performs Bluetooth wireless communication at the frequency band 2.402GHZ to 2.480GHZ.

[0046] FIG. 2 shows a home wireless communication network comprising a wireless communication device 8 . In the network of FIG. 2, home appliances 10A, 10B, and 10C are equipped with controllers 11A, 11B, and 11C and wireless communication devices 12A, 12B, 1...

Embodiment 2

[0064] FIG. 6 shows a wireless communication device 20 according to Embodiment 2 of the present invention. The wireless communication device is characterized by detecting radio waves leaked from a microwave oven. That is, according to Embodiment 2, the wireless communication device 20 has a wave detector 36 for detecting the waveform of the signal received by the antenna 30, and a magnetron operation detector 37 for detecting the magnetron operation of the microwave oven according to the detected waveform. The operation of the magnetron and the detected operation of the magnetron are provided to the high frequency / power switching circuit 34 . Other elements of Embodiment 2 are the same as those of Embodiment 1 in FIG. 3, so they are denoted by similar reference numerals.

[0065]According to Embodiment 2, the antenna 30 receives strong radio waves leaked from the magnetron of the microwave oven, if any. The waveform detector 36 detects the waveform of the received signal. A...

Embodiment 3

[0071] Figure 8 A circuit diagram of a microwave oven using an inverter-driven magnetron according to Embodiment 3 of the present invention is shown. The microwave oven includes a magnetron 101 , an inverter 102 switching components such as IGBTs 103 and 104 , a switching driver 105 , a full wave rectifier 106 , a mains 107 , and a high frequency transformer 108 . The electric energy provided by the mains is full-wave rectified by the full-wave rectifier 106 . Switching driver 105 controls the gates of switching assemblies 103 and 104 to generate high frequency power, which is sent to primary coil 109 of high frequency transformer 108 to increase power. The second coil 110 of the transformer 108 supplies high-frequency power with increased voltage to the magnetron 101 to generate microwaves.

[0072] The switching driver 105 is controlled by a converter controller 115 . Inverter controller 115 stops the switching operation of inverter 102 for a predetermined period of time...

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PUM

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Abstract

A microwave oven has an inverter controller (115) that controls an inverter (102) to produce high-frequency power from a commercial power source (107) and supply the high-frequency power to a magnetron (101). The inverter controller (115) stops the output of the magnetron for a predetermined period ( tau 11) around a zero-volt crossing point of the commercial power source (107), to enable wireless communication during the period ( tau 11) at a frequency band equivalent to a frequency band of the magnetron (101). Even during the operation of the magnetron (101), wireless communication is secured at the frequency band without interrupting a heating (cooking) operation or deteriorating heating efficiency.

Description

technical field [0001] The present invention relates to a wireless communication device for short-range wireless network communication at or near the frequency band between 2.4 GHz and 2.5 GHz used by magnetrons installed in microwave ovens. [0002] The invention also relates to a microwave oven capable of minimizing frequency interference of a wireless communication network of a frequency band used by a magnetron installed in the microwave oven. Background technique [0003] The microwave oven has a magnetron that can generate microwaves at 2.4GHZ to 2.5GHZ to cook food in the microwave. Figure 20 shows an example of an iron core transformer driven magnetron in a microwave oven. Transformer 1100 and diode 1101 generate double voltage, half-wave current from mains AC power and provide the generated current to magnetron 1102 . Fig. 21 shows a commutation-driven magnetron in a microwave oven. This example includes a full-wave rectifier 1104 , an inverter 1105 , and a high-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/713F24C7/00H05B6/64H04B7/005H04L1/18H04L12/56H05B6/68
CPCH04L1/1803H04W52/04H04W16/14H05B6/688H04W84/18Y02B60/50H04L1/0007H05B6/68
Inventor 古田和浩野田臣光田中俊雅
Owner TOSHIBA LIFESTYLE PROD & SERVICES CORP