CN1904483A

CN1904483A - Microwave oven having identifying metal processing utensil function

Info

Publication number: CN1904483A
Application number: CNA2005100146729A
Authority: CN
Inventors: 申昕
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2005-07-29
Filing date: 2005-07-29
Publication date: 2007-01-31

Abstract

This invention provides a kind of microwave oven that can identify the metal cuisine container. It includes the rotary disk of the cooking room. In the electricity control room there is control circuit. In the control circuit there is main control slug which connects with the current source. Between the power of the control circuit and the main control slug there is alarm circuit and they form a loop with the control circuit. There set the conductive coat and standard riding line on the rotary disk. Through the conductive end set under the rotary disk that the rotary disk's standard riding line connects with, one conductive end connects with the power of the control circuit, and the other connects with the alarm loop and the main control slug. The beneficial result is that structure can detect the cuisine container's materials before the microwave oven's work. It can insure the safety and increase the practicability of the microwave oven. It makes the users who don't know much of the microwave oven not use the metal cuisine container, then it avoids the phenomenon of striking fire by metal. And it improves the safety of the microwave oven usage.

Description

Micro-wave oven with identification metal processing utensil function

Technical field

The present invention relates to a kind of micro-wave oven with identification metal processing utensil function.

Background technology

Usually, micro-wave oven be a kind of microwave that is approximately 2450MHz with frequency as heating source, by destroying the molecules align in the food, thereby utilize the frictional heat of intermolecular generation to come the device of heat food.Fig. 1 is the microwave oven stereogram of prior art.As shown in Figure 1, the micro-wave oven of this prior art mainly comprises: the external box of microvave 1 that constitutes micro-wave oven end face, bottom surface, two sides and back side external structure; Be arranged on inside one side of external box of microvave 1, place the heating cavity 2 for the treatment of cooking food within it on the rotating disc 6 that can be provided with; The not shown opposite side that is arranged on external box of microvave 1 inside various electronic components such as the magnetron that can produce microwave and high-tension transformer are installed in it, and front end is provided with the electric control chamber of the control panel 3 that can control running of microwave oven; With the front end face that is arranged on external box of microvave 1, alternative opens and closes heating cavity 2, and the fire door 4 of handle is installed on the outer surface.This micro-wave oven control system need be done keyboard scan before the cooking operation, the gate control position is detected, and arranged operation more normally after the last electro-detection, relay port controlling, to guarantee to arrange safety.When utilizing this micro-wave oven to cook, the microwave that is produced by magnetron in the electric control chamber can be radiated on the food on heating cavity 2 inward turning rotating discs 6 surfaces, can heat this food thus.Some user does not understand for the cooking operation of micro-wave oven, uses metal processing utensil.And do not have corresponding metal to arrange the detection method of vessel in traditional controlling circuit of microwave oven program yet, thereby can cause spark phenomenon, increased the hidden danger factor of using micro-wave oven.

Summary of the invention

For solving the problem that exists in the above-mentioned technology, the purpose of this invention is to provide a kind of micro-wave oven with identification metal processing utensil function, by improvement, improve the security performance and the Practical Performance of micro-wave oven work to control circuit in the microwave oven electric control chamber.

For achieving the above object, technical scheme of the present invention provides a kind of micro-wave oven with identification metal processing utensil function, include cooking room, electric control chamber, in described cooking room, be provided with and place the rotating disc for the treatment of cooking food, in described electric control chamber, be provided with control circuit, in described control circuit, contain the main control chip that is connected with power supply, wherein: between the power supply of described control circuit and main control chip, be provided with warning circuit and form the loop with described control circuit; On described rotating disc, be provided with conductive coating and standard is laid line, lay line by the standard on the described rotating disc and connect the conducting terminal that is located at described rotating disc below, wherein a conducting terminal links to each other with power supply in the described control circuit, and another conducting terminal is connected with described main control chip with described warning circuit; When micro-wave oven did not have metal processing utensil on coating, the loop was in normally open, and warning circuit does not carry out work; When micro-wave oven had metal processing utensil on coating, the main control chip application was interrupted, and the main control chip response external is interrupted, and stopped all cooking operations, and after the user removed metal processing utensil, warning circuit quit work.

Described conductive coating is that two semi-circular shapes are provided with, and lays line with described conducting terminal by described standard respectively and be connected.

Described warning circuit includes the multivibrator that is connected with described two conducting terminals, is connected with buzzer with described multivibrator.

Effect of the present invention is that this structure detects before the microwave operation microwave oven dealing vessel material, can guarantee the security of micro-wave oven work, increase the practicality of micro-wave oven, can make user that micro-wave oven is not really understood when the operation micro-wave oven, not use the cooking vessel of metal, avoid the generation of the spark phenomenon that metal causes.Can improve the security that micro-wave oven uses.

Description of drawings

Fig. 1 is the microwave oven structure schematic diagram of prior art;

Fig. 2 is a microwave oven structure schematic diagram of the present invention;

Fig. 3 is the local circuit block diagram of micro-wave oven of the present invention;

Fig. 4 is a micro-wave oven warning workflow diagram of the present invention;

Fig. 5 is the warning circuit figure of micro-wave oven of the present invention.

The specific embodiment

Reaching embodiment in conjunction with the accompanying drawings is illustrated the micro-wave oven that the present invention has the identification metal processing utensil function.

Shown in Fig. 2-5, control circuit with metal processing utensil alarm circuit in the identification micro-wave oven of the present invention is to have increased alarm circuit in the control circuit in former micro-wave oven control room 3, and correspondingly be provided with conductive coating on the rotating disc 6 and standard is laid line described revolving, lay the line connection by described standard of revolving on the rotating disc 6 and be located at the described conducting terminal that revolves rotating disc 6 belows, and be connected with described main control chip.

Concrete structure with micro-wave oven of identification metal processing utensil function is to realize like this.

Coat on the rotating disc 6 in cooking chamber for microwave oven 2 and be semi-circular conductive materials coating, conductive coating is arranged at bottom disk in microwave oven, and the chassis is provided with standard and lays line, has brush to connect conducting terminal under the chassis, so that contact, be connected with power supply and warning circuit with cooking vessel bottom.After as metal processing utensil two-terminal being communicated with, warning circuit sends alarm signal, and sends external interrupt signal to main control chip.Main control chip stops to arrange procedure operation, and the prompting user changes the cooking vessel, operate as normal after changing.

When rotating disc 6 when normal place is laid, conductive coating connects conducting terminal by brush, conducting terminal links to each other with master board by lead.Master board is provided with corresponding warning circuit, and when not having metal processing utensil on coating, the loop is in normally open, and warning circuit does not carry out work.

When the user used metal processing utensil to arrange operation, because the electric conductivity of metal will be communicated with two conducting terminals on the bottom disk in microwave oven, warning circuit carried out work, drives buzzer and reports to the police.For prevent that buzzer from working always, set corresponding time of fire alarming.The conducting terminal communications signals, by the respective pin of chip, the main control chip application is interrupted, the main control chip response external is interrupted, and stops all cooking operations, after the user removes metal processing utensil, warning circuit quits work, and chip carries out the cooking operation of back.

Q1 in the warning circuit, Q2 forms multivibrator, and when two conducting terminals did not have conducting, when multivibrator did not carry out work, buzzer did not have sound.When two conducting terminals were communicated with control circuit, the oscillator operate as normal was sent pulse signal, drove buzzer work, sent to main control chip simultaneously and interrupted the application signal.The main control chip response is interrupted, and stops the cooking operation.

Claims

1, a kind of micro-wave oven with identification metal processing utensil function includes cooking room, electric control chamber, in described cooking room, be provided with and place the rotating disc for the treatment of cooking food, in described electric control chamber, be provided with control circuit, in described control circuit, contain the main control chip that is connected with power supply, it is characterized in that:

Between the power supply of described control circuit and main control chip, be provided with warning circuit and form the loop with described control circuit; On described rotating disc, be provided with conductive coating and standard is laid line, lay line by the standard on the described rotating disc (6) and connect the conducting terminal that is located at described rotating disc (6) below, wherein a conducting terminal links to each other with power supply in the described control circuit, and another conducting terminal is connected with described main control chip with described warning circuit; When micro-wave oven did not have metal processing utensil on coating, the loop was in normally open, and warning circuit does not carry out work; When micro-wave oven had metal processing utensil on coating, the main control chip application was interrupted, and the main control chip response external is interrupted, and stopped all cooking operations, and after the user removed metal processing utensil, warning circuit quit work.

2, the micro-wave oven with identification metal processing utensil function according to claim 1, it is characterized in that: described conductive coating is that two semi-circular shapes are provided with, and lays line with described conducting terminal by described standard respectively and be connected.

3, according to claim 1,2 described micro-wave ovens with identification metal processing utensil function, it is characterized in that: described warning circuit includes the multivibrator that is connected with described two conducting terminals, is connected with buzzer with described multivibrator.