Surge current proof microwave oven circuit

A technology of surge current and microwave ovens, which is applied in the field of microwave ovens to achieve the effects of simplifying the production process, reducing manufacturing costs, and improving signal performance

Inactive Publication Date: 2005-12-07
LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

but if Figure 4b As shown, the inrush current prevention circuit using the NTC thermistor R1 causes excessive temperature rise and power loss after the load current stabilizes.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Surge current proof microwave oven circuit
  • Surge current proof microwave oven circuit
  • Surge current proof microwave oven circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments: Figure 5a and Figure 5b It is a schematic diagram of a circuit for preventing surge current in a microwave oven according to an embodiment of the present invention. among them Figure 5a In order to use the NTC thermistor of the present invention to prevent surge current circuit diagram; Figure 5b It is a graph of the resistance value of the temperature change of the NTC thermistor of the present invention.

[0030] Such as Figure 5a As shown, according to the embodiment of the present invention, the surge current prevention device includes a first device and a second device, that is, the surge current prevention circuit is connected in parallel by the first device thermistor R10 and the second device thermistor R20. Connection composition. In this way, the thermistor R10 / R20 can obtain the parallel characteristic between the components, and in order ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A surge current preventing circuit for microwave oven, which contains the first device and second device, when the surge current flows in the first device the stabilized current with the rising of temperature is provided to high and low voltage transformer, with the rising of temperature caused by first device the second has precedence over the first device to provide the stable current to high and low voltage transformer and inhibit the surge current for preventing temperature rising, so the power loss and over heat are reduced, the NTC thermistor is also used in said invention to reduce the cost and simplify the productive procedure.

Description

Technical field [0001] The present invention relates to a microwave oven, in particular to a circuit for preventing surge current in a microwave oven. In particular, it relates to an improved circuit for preventing inrush current in a microwave oven, which reduces the power loss caused by an early inrush current and can prevent an excessive temperature rise. Background technique [0002] Normally, the magnetron of a microwave oven generates microwaves after applying high voltage, and uses this microwave to cook food. [0003] Figure 1 to Figure 2 It is an exploded three-dimensional schematic diagram of a general microwave oven and a schematic structural diagram of a general magnetron drive circuit. Such as figure 1 and figure 2 As shown, the microwave oven door 120 seals the heating chamber 110, and the heating chamber 110 is supplied with microwaves to heat the food placed inside the heating chamber 110. An electric control room 100 for generating microwaves is provided on o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02
Inventor 权京颜
Owner LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products