CN1550718A - Control circuit of microwave oven - Google Patents
Control circuit of microwave oven Download PDFInfo
- Publication number
- CN1550718A CN1550718A CNA03123383XA CN03123383A CN1550718A CN 1550718 A CN1550718 A CN 1550718A CN A03123383X A CNA03123383X A CN A03123383XA CN 03123383 A CN03123383 A CN 03123383A CN 1550718 A CN1550718 A CN 1550718A
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- control
- voltage
- master controller
- circuit
- tension transformer
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Abstract
The control circuit comprises low volt transformer, first and second rectification parts and main controller. Interrupt circuit part, voltage stabilizing circuit, acoustic control unit, part of controlling airblast motor, control unit of high-voltage transformer and unit of sensing door operation are integrated in a chip. Thus, the control circuit possesses advantages of reduced quantity, size of elements, and sizes of circuit board, simple operating steps and lowered cost.
Description
Technical field
The present invention relates to a kind of control circuit of micro-wave oven, particularly relate to a kind of control circuit of the micro-wave oven of can a plurality of circuit of carrying out different operating respectively are integrated with chip and constituting.
Background technology
Recently, gas burner, gas-fired furnace, micro-wave oven and the electric furnace etc. as the family cooking device have obtained utilizing widely.Wherein, micro-wave oven is that the microwave that produces with the magnetron of installing in it is that main heating source heats the device of finishing cooking function to the culinary art thing in the furnace chamber.Fig. 1 is the control circuit figure of the micro-wave oven of prior art.As shown in Figure 1, the control circuit of this micro-wave oven is by can be with the ac voltage rectifier exported in the low-tension transformer and first and second rectification part H of filtering, I; Utilize the alternating voltage of low-tension transformer output and produce the interrupt circuit portion 1 of interrupting and outputing to not shown master controller; To carry out voltage stabilizing from the DC voltage of first rectification part H output to form the mu balanced circuit portion 2 that 5V stablizes positive voltage; Come the acoustic control portion 3 of output sound according to the control of master controller; Control according to master controller comes the blower motor control part 4 that unshowned blower motor drives in the control chart; Control the high-tension transformer control part 5 of high-tension transformer according to the control of master controller; But form with the door sense part 6 of unshowned door opening and closing in the perceptual map.At first, the 220V alternating voltage that low-tension transformer will be introduced from the outside converts the 12V alternating voltage to, outputs to first and second rectification part H then, I.Then, interrupt circuit portion 1 utilizes the 12V alternating voltage of low-tension transformer output and produces interruption and offer master controller.The first rectification part H then will convert DC voltage to and output to mu balanced circuit portion 2 from the 12V alternating voltage of low-tension transformer output.At this moment, mu balanced circuit portion 2 can form the DC voltage of exporting among the first rectification part H the stable positive voltage of 5V.Acoustic control portion 3 then under the control of master controller to controlling by the voice output of not shown voice output components and parts.Simultaneously, blower motor control part 4 is controlled the switch motion of not shown blower motor under the control of master controller.At last, door sense part 6 will output in the master controller after will coming the perceptual signal of perception door to convert the voltage of 5V to 2V or 24V according to the switching of the fire door that is arranged on not shown micro-wave oven front.In the control circuit of above-mentioned micro-wave oven, interrupt circuit portion 1, mu balanced circuit portion 2, acoustic control portion 3, blower motor control part 4, high-tension transformer control part 5 and door sense part 6 all are to constitute interlock circuit by various analog components.But, there is following problem in the control circuit of this micro-wave oven, first, because the interrupt circuit portion 1 in the control circuit of micro-wave oven, mu balanced circuit portion 2, acoustic control portion 3, blower motor control part 4, high-tension transformer control part 5 and door sense part 6 are made of various analog components, so the element on these circuit not only quantity is various, thereby the size of printed circuit board (PCB) is become greatly, and the processing charges of printed circuit board (PCB) also can increase; The second, the operational sequence that analog component is installed on printed circuit board (PCB) is numerous and diverse; The 3rd, can cause producing cost to rise during mass production.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of control circuit that dwindles the size of printed circuit board (PCB) and can make the micro-wave oven that is more prone to of operation.
In order to achieve the above object, the control circuit of micro-wave oven provided by the invention by the low-tension transformer that high voltage can be converted to low-voltage, can be with first and second rectification part of then exporting from the rectification of interchange low-voltage and the filtering of low-tension transformer output in the DC voltage mode; Form with the master controller that can control whole system, wherein can utilize the alternating voltage of low-tension transformer output and produce the interrupt circuit portion of interrupting and outputing to master controller, the DC voltage of first rectification part output can be carried out voltage stabilizing and forms the mu balanced circuit portion that 5V stablizes positive voltage, can control the acoustic control portion of voice output according to the control of master controller, can control the blower motor control part that blower motor drives according to the control of master controller, but it is integrated with a chip to control a plurality of circuit such as door sense part of switching of the high-tension transformer control part of high-tension transformer and perception door according to the control of master controller.
The control circuit of micro-wave oven provided by the invention can come integrated with a chip a plurality of circuit such as interrupt circuit portion, mu balanced circuit portion, acoustic control portion, blower motor control part, high-tension transformer control part and door sense part of carrying out different operating respectively, the number of elements of control circuit is significantly reduced, and the size of printed circuit board (PCB) is reduced.In addition, operational sequence is simpler, and can also reduce producing cost during mass production.
Description of drawings
Be elaborated below in conjunction with the control circuit of the drawings and specific embodiments to micro-wave oven of the present invention.Identical with prior art in the present invention structure is used identical symbol.
Fig. 1 is the control circuit of the micro-wave oven of prior art.
Fig. 2 is the control circuit of micro-wave oven of the present invention.
The specific embodiment
As shown in Figure 2, the control circuit of micro-wave oven of the present invention is by the low-tension transformer that high voltage can be converted to low-voltage; First and second rectification part H that the ac voltage rectifier exported in the low-tension transformer and filtering then can be exported in the mode of DC voltage, I; Form with the master controller that can control whole system; In the control circuit of this micro-wave oven, utilize the alternating voltage of low-tension transformer output and produce the interrupt circuit portion 1 of interrupting and outputing to master controller, the DC voltage of first rectification part H output can be carried out voltage stabilizing to form the mu balanced circuit portion 2 that 5V stablizes positive voltage, can control the acoustic control portion 3 of voice output according to the control of master controller, can control the blower motor control part 4 that blower motor drives according to the control of master controller, but it is integrated with a chip 10 to control a plurality of circuit such as door sense part 6 of the high-tension transformer control part 5 of high-tension transformer and perception door opening and closing according to the control of master controller.The formation of the control circuit of micro-wave oven of the present invention and connection status compared with Fig. 1 of prior art describe.At first, the A ' interface of chip 10 is equivalent to the A point of interrupt circuit portion 1, and a ' interface is equivalent to a point.So passing through interruption that A ' interface can produce the 12V alternating voltage that utilizes low-tension transformer output pass through a ' interface and output in the master controller.And the B ' interface of chip 10 is equivalent to be connected to from the first rectification part H B point of mu balanced circuit portion 2, and b ' interface is equivalent to the b point of mu balanced circuit portion 2.Pass through B ' interface and the DC voltage from first rectification part H output can be carried out voltage stabilizing to form the stable positive potential of 5V.In addition, the RST of chip 10 (resetting) interface is equivalent to the RST point of mu balanced circuit portion 2, and com interface is equivalent to the COM point of mu balanced circuit portion 2.Because the C ' interface of chip 10 is equivalent to the C point of acoustic control portion 3, c ' interface is equivalent to the c point, so pass through the control signal that c ' interface can receive master controller, passes through C ' interface and the associated control signal of exportable sound is outputed in the voice output components and parts.And because the D ' interface of chip 10 is equivalent to the D point of blower motor control part 4, d ' interface is equivalent to the d point.So, pass through the control signal that d ' interface can receive master controller, the switching signal that drives blower motor can be passed through the output of D ' interface according to above-mentioned control signal then.In addition, because the E ' interface of chip 10 is equivalent to the E point of a sense part 6, e ' interface is equivalent to the e point, so can pass through e ' interface then and output in the master controller with passing through that E ' interface receives and convert this signal the voltage of 5V to the door perceptual signal of 12V or the perception of 24V voltage according to the switch of door.At last, because the F ' interface of chip 10 is equivalent to the F point of high-tension transformer control part 5, f ' interface is equivalent to the f point, so pass through the control signal that f ' interface can receive master controller, the switching signal that can drive high-tension transformer according to this control signal is passed through the output of F ' interface then.Be that the present invention has constituted a chip 10 with a plurality of circuit that the interrupt circuit portion 1 in the control circuit of the micro-wave oven of prior art, mu balanced circuit portion 2, acoustic control portion 3, blower motor control part 4, high-tension transformer control part 5 and door sense part 6 etc. can be carried out different operating respectively, this chip can be carried out the operation of foregoing circuit according to relevant logic.
Claims (1)
1, a kind of control circuit of micro-wave oven, it is characterized in that: the control circuit of described micro-wave oven by the low-tension transformer that high voltage can be converted to low-voltage, can with first and second rectification part of then exporting from the rectification of interchange low-voltage and the filtering of low-tension transformer output in the DC voltage mode (H, I); Form with the master controller that can control whole system, wherein can utilize the alternating voltage of low-tension transformer output and produce the interrupt circuit portion (1) of interrupting and outputing to master controller, the DC voltage of first rectification part (H) output can be carried out voltage stabilizing and forms the mu balanced circuit portion (2) that 5V stablizes positive voltage, can control the acoustic control portion (3) of voice output according to the control of master controller, can control the blower motor control part (4) that blower motor drives according to the control of master controller, can according to the control of master controller control high-tension transformer high-tension transformer control part (5) but and door sense part a plurality of circuit such as (6) of the switching of perception door integrated with a chip (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA03123383XA CN1550718A (en) | 2003-04-25 | 2003-04-25 | Control circuit of microwave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA03123383XA CN1550718A (en) | 2003-04-25 | 2003-04-25 | Control circuit of microwave oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1550718A true CN1550718A (en) | 2004-12-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA03123383XA Pending CN1550718A (en) | 2003-04-25 | 2003-04-25 | Control circuit of microwave oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1550718A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776296A (en) * | 2010-03-01 | 2010-07-14 | 美的集团有限公司 | Model selection control device of microwave oven and selection control method thereof |
| CN101940992A (en) * | 2010-08-20 | 2011-01-12 | 厦门松霖科技有限公司 | Effluent device for controlling waterway by collecting outside sound |
-
2003
- 2003-04-25 CN CNA03123383XA patent/CN1550718A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776296A (en) * | 2010-03-01 | 2010-07-14 | 美的集团有限公司 | Model selection control device of microwave oven and selection control method thereof |
| CN101776296B (en) * | 2010-03-01 | 2011-09-14 | 广东美的微波电器制造有限公司 | Type selection control device and selection control method of microwave oven |
| CN101940992A (en) * | 2010-08-20 | 2011-01-12 | 厦门松霖科技有限公司 | Effluent device for controlling waterway by collecting outside sound |
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