CN1705410A - Microwave oven motor drive circuit using circuit board voltage - Google Patents
Microwave oven motor drive circuit using circuit board voltage Download PDFInfo
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- CN1705410A CN1705410A CN 200410019343 CN200410019343A CN1705410A CN 1705410 A CN1705410 A CN 1705410A CN 200410019343 CN200410019343 CN 200410019343 CN 200410019343 A CN200410019343 A CN 200410019343A CN 1705410 A CN1705410 A CN 1705410A
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- motor
- transformer
- microwave oven
- circuit board
- relay
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Abstract
A microwave oven motor driving circuit utilizing circuit board voltage, which contains transformer for connecting external ac power supply, motor consisting of driving motor for driving rotary disk and timing motor for timing cooking which are connected with transformer and worked under the voltage outputted by transformer, the first relay connected with transformer and motor and worked under user setting, said invention can use circuit to control motor for reducing cost and simplifying process.
Description
Technical field
The present invention relates to a kind of microwave oven.Relate to a kind of relevant invention that utilizes the microwave oven motor-drive circuit of circuit board voltage furtherly.
Background technology
Recently, as the cooking equipment that uses in the family, gas range, gas burner, microwave oven etc. just are used widely.
Wherein, microwave oven is to utilize inner magnetron to produce microwave, and is the cooking device that main heating source heats the gratin in the cooking cavity with microwave.
The basic framework of microwave oven is formed by the cooking cavity assembly.Centre in cooking cavity assembly inside forms cooking cavity.In cooking cavity, place gratin, utilize microwave to heat.The position adjacent with cooking cavity forms electric control chamber.In electric control chamber, be provided with many electric components, be used to produce microwave.
Cooking cavity is a kind of cooking space that utilizes the microwave heating gratin of magnetron generation, passes through door opening and closing.
The inside of electric control chamber is provided with magnetron, transformer and blower fan.Magnetron produces microwave.Transformer becomes high frequency voltage to voltage and is supplied to magnetron.Blower fan forms the air-flow that passes cooking cavity inside, and the cooling electric component.
Below, the microwave oven motor-drive circuit under the conventional art is described.
As shown in Figure 1, under the conventional art, the drive circuit of microwave oven motor comprises power input part (ellipsis), switch 1, fluorescent tube 2, rotary tray motor 3, fan motor the 4, the 1st relay the 5, the 2nd relay 6, systems control division (figure slightly).Wherein power input part is used to connect the AC power of 220V/60Hz.Switch 1 is switched on or switched off the power supply of importing by power input part for whole system.Fluorescent tube 2 is used to allow the user confirm the food state of cooking cavity inside.Rotary tray motor 3 drives the rotating disk (figure slightly) that is used to place food.The fan motor-driven fan allows the fan cooled electric control chamber also comprise cooking cavity simultaneously.The action of the 1st relay 5 control fluorescent tubes 2.The action of the 2nd relay 6 control fan motors 4.Systems control division is by user's cooking order control whole system operation.
Have in the microwave oven driving circuit of said structure, after connecting main power source (alternating current of 220V), systems control division is in on-state by switch 1, and for by user's cooking command driven fluorescent tube 2, rotary tray motor 3, fan motor 4, the 1st and the 2nd relay 5,6 is controlled.
Under the control of systems control division, when the 1st, the 2nd relay was in on-state, fluorescent tube 2, rotary tray motor 3 and fan motor 4 were driven.
As shown in Figure 2, fan motor 4 has 3 joints, also has 3 terminals and be used to connect the connector of fanning motor 4.
As shown in the figure, the transition joint with fan motor 4 connects rotary tray motor 3.
As shown in Figure 3.Under the conventional art, microwave oven forms 3 joints in order to draw the voltage A of 220V and the voltage B of 21V from the fan motor coil.On the joint of 0V and 220V, be connected fan motor 4, on the joint of 0V and 21V, be connected rotary tray motor 3 or timing motor 7.The 7 pairs of cookings with the user of timing motor order the corresponding time to carry out timing.
That is, fan motor 4 with the driven of 220V.And the fan motor coil transition joint (21V) B draw after, be connected on rotary tray motor 3 or the timing motor 7.
But there are the following problems for the microwave oven motor-drive circuit under the conventional art.
The 1st, the fan motor has 3 joints, utilizes the 21V driven rotary tray motor or the timing motor of transition joint.Therefore have more connection point terminal, cause increasing flow chart.
The 2nd, in order to supply the voltage of 220V and 21V, the coil of fan motor has 3 joints.Thereby cost is than higher.
Summary of the invention
Technical problem to be solved by this invention is that a kind of microwave oven motor-drive circuit that utilizes circuit board voltage is provided.
The technical solution adopted in the present invention is: a kind of microwave oven motor-drive circuit that utilizes circuit board voltage, in with the microwave oven of magnetron as heating source, comprise and insert the transformer that rated voltage is provided for circuit board after the AC power supplies from the outside, also be provided with 2 ends that are connected transformer, the motor that under the rated voltage effect of transformer output, carries out work.
Motor is to be used to drive the rotary tray motor of rotating disk or the timing motor that cooking time is carried out timing
Motor one end is connected 2 ends of transformer, the other end is connected an end of first relay, first relay is connected with 2 ends of transformer, and after first relay was connected by user's culinary art order, motor carried out work under the voltage effect of main relay output.
In sum, the microwave oven motor-drive circuit of circuit board voltage that utilizes provided by the invention has following invention effect.
The 1st, utilize the motor of circuit board driven microwave oven, so can control motor easily by circuit board.
The 2nd, utilize circuit board driven rotary tray motor or timing motor.Therefore, joint or parts (relay etc.) need not be set in addition, thereby can reduce the cost of product and simplify working process.
Description of drawings
Fig. 1 is the schematic diagram of microwave oven motor-drive circuit under the conventional art;
Fig. 2 is conventional art lower fan motor and rotary tray motor wiring state schematic diagram;
Fig. 3 is a motor circuit wiring state schematic diagram under the conventional art;
Fig. 4 is for utilizing the microwave oven motor-drive circuit schematic diagram of circuit board voltage among the present invention.
Wherein:
10: switch portion 20: fluorescent tube
30: fan motor 40: rotary tray motor
60: the 2 relays of 50: the 1 relays
70: transformer
Embodiment
Below, with reference to accompanying drawing,, be elaborated to microwave oven motor-drive circuit one embodiment that utilizes circuit board voltage provided by the invention.
As shown in Figure 4, the microwave oven motor-drive circuit of circuit board voltage that utilizes provided by the invention relates to the microwave oven of magnetron as heating source, comprises power input part (ellipsis), switch 10, fluorescent tube 20, fan motor the 30, the 1st relay the 50, the 2nd relay 60, transformation 70, motor.Wherein power input part is used to connect the external ac power source of 220V/60Hz.Switch portion 10 is switched on or switched off the power supply of importing by power input part for whole system.Fluorescent tube 20 is in order to allow the user confirm the food state of cooking cavity inside.Fan motor 30 drive fan (figure slightly).The action of the 1st relay 50 control fluorescent tubes 20.The action of the 2nd relay 60 control fan motors 30.Systems control division is by user's cooking order control whole system operation.Transformer 70 is from power input part incoming transport power supply, for circuit board provides necessary 12V voltage.Motor is connected 2 ends of transformer, carries out work under the rated voltage effect of transformer 70 outputs.
Here, motor is to be used to drive the rotary tray motor 40 of rotating disk or in parallel with rotary tray motor 40, and the timing motor (figure slightly) that is carried out timing the cooking time.
The microwave oven motor-drive circuit that utilizes circuit board voltage provided by the invention moves as follows.
At first, behind the connection main power source (alternating current of 220V), systems control division is in on-state by switch 10, and presses user's cooking order, allows the 1st and the 2nd relay 5,6 be in on-state.
Transformer 70 inserts after the AC power of power input part output, the rated voltage 12V that the output circuit plate is required.
In the microwave oven provided by the invention, an end of rotary tray motor 40 is connected 2 ends (A contact) of transformer 70, and the other end is connected an end of the 1st relay 50.
The other end of the 1st relay 50 is connected 2 ends (B contact) of transformer 70.
When the 1st relay 50 was in on-state by user's cooking order, rotary tray motor 40 inserted 2 terminal voltages of transformers 70, and promptly the voltage of circuit board carries out work.
In more detail, rotary tray motor 40 is by the control of the 1st relay 50, under 2 end A contacts and the voltage between the B contact of transformer 70, carries out work.
When the 1st relay 50 is in off-state, or system power supply is when being closed, and 2 terminal voltages of transformer 70 are disconnected, and rotary tray motor 40 can quit work.
Among the present invention, driven relay under the control of systems control division (the 1st relay 50, the 2 relays 60) can be used as control device and uses, the work of control rotary tray motor 40.
Identical with rotary tray motor, the timing motor (figure slightly) that is connected in parallel on the rotary tray motor 40 when the 1st relay 50 is in on-state, carries out work under the voltage effect of circuit board.
Motor-drive circuit provided by the invention utilizes the voltage 12V of circuit board to drive microwave oven motor (rotary tray motor or timing motor) and drives.
If application person possesses the ABC of one's own profession, just can in the basic fundamental thought range of foregoing, much change.Interest field of the present invention is not subjected to the restriction of embodiment, should make an explanation based on accompanying right request scope.
Claims (4)
1. microwave oven motor-drive circuit that utilizes circuit board voltage, in with the microwave oven of magnetron as heating source, comprise and insert the transformer (70) that rated voltage is provided for circuit board after the AC power supplies from the outside, it is characterized in that, also be provided with 2 ends that are connected transformer (70), the motor that under the rated voltage effect of transformer (70) output, carries out work.
2. the microwave oven motor-drive circuit that utilizes circuit board voltage according to claim 1 is characterized in that, described motor is a kind of of rotary tray motor (40) that is used for driving rotating disk or the timing motor that cooking time is carried out timing.
3. the microwave oven motor-drive circuit that utilizes circuit board voltage according to claim 1 is characterized in that, described motor is the rotary tray motor (40) that is used to drive rotating disk and in parallel with it, the timing motor that cooking time is carried out timing.
4. according to claim 2 or the 3 described microwave oven motor-drive circuits that utilize circuit board voltage, it is characterized in that, described motor one end is connected 2 ends of transformer (70), the other end is connected an end of first relay (50), first relay (50) is connected with 2 ends of transformer (70), after first relay (50) was connected by user's culinary art order, motor carried out work under the voltage effect of transformer (70) output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410019343 CN1705410A (en) | 2004-05-27 | 2004-05-27 | Microwave oven motor drive circuit using circuit board voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410019343 CN1705410A (en) | 2004-05-27 | 2004-05-27 | Microwave oven motor drive circuit using circuit board voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1705410A true CN1705410A (en) | 2005-12-07 |
Family
ID=35577945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410019343 Pending CN1705410A (en) | 2004-05-27 | 2004-05-27 | Microwave oven motor drive circuit using circuit board voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1705410A (en) |
-
2004
- 2004-05-27 CN CN 200410019343 patent/CN1705410A/en active Pending
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |