CN203177247U - Structure of low noise fan system of microwave oven - Google Patents
Structure of low noise fan system of microwave oven Download PDFInfo
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- CN203177247U CN203177247U CN 201320213013 CN201320213013U CN203177247U CN 203177247 U CN203177247 U CN 203177247U CN 201320213013 CN201320213013 CN 201320213013 CN 201320213013 U CN201320213013 U CN 201320213013U CN 203177247 U CN203177247 U CN 203177247U
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- fan
- microwave oven
- temperature
- low noise
- loop
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Abstract
The utility model discloses a structure of a low noise fan system of a microwave oven. The structure is characterized by comprising a temperature detection module, a driving circuit and a control circuit, wherein the temperature detection module is provided with a temperature probe for monitoring heating condition of a heating element of the microwave oven and a temperature detection terminal for outputting data detected by the temperature detection probe; the driving circuit is connected to a circuit loop of a fan and is provided with a driving end which controls the rotating speed change of the fan; and the control circuit is connected with the temperature detection terminal and the driving end, and the control circuit is provided with a predetermined module which is provided with a power detection terminal for collecting the actual power information of the microwave oven. According to the scheme, the rotating speed of the fan is lower than 2000 r/m according to current power data of the microwave during work; and the temperature detection module detects temperature in real time to obtain the temperature ultralimit data so as to drive the fan motor to rotate in an accelerated manner when the temperature is of ultralimit till the temperature is decreased. Therefore, the rotating speed of the fan is reasonably controlled. The structure has the energy-saving effect and has the capacity of handling outburst heat.
Description
Technical field
The utility model relates to a kind of structure of domestic microwave furnace apparatus, specifically is a kind of structure with fan for microwave oven system of low noise characteristics.
Background technology
The domestic microwave furnace apparatus has had quite ripe structure, and its circuit structure has powerful electronic switching device and corresponding control loop, can be because the cause of big electric current produces heat when normal operation.So, around the heating components and parts of micro-wave oven, corresponding air duct can be set, utilize fan to rotate and produce the air blast cooling air with enough flows and flow velocity, with heating components and parts generation heat loss through convection, make it to obtain cooling.
As can be known, consider the reason of the volume of micro-wave oven own from existing embodiment, its air cooling system must be restricted, and be to ensure the effect of air blast cooling, all can make the rotating speed of fan remain on certain level usually and realize.Empirical data indicates, when rotation speed of the fan during near 2000 rev/mins, can drive air and reach sufficient convection current flow velocity.So the air blast cooling scheme of most household microwave ovens is all used stable rotation speed of the fan near 2000 rev/mins.Heating components and parts to electronic switch, big current loop in the running of microwave oven process continue the stable convection current air of supply.Actual product indicates that this class heat sink conception effect is remarkable, and reliability is good.
But, just because of this class fan system relies on the constant high rotating speed of fan, thereby bring certain noise inevitably, and this noise can not be eliminated in the running of microwave oven process.So, because the noise problem that fan system brings has become the drawback that the micro-wave oven product day by day highlights.
The utility model content
At existing fan for microwave oven system because high rotating speed, high wind speed bring noise obviously, the problem that is difficult to remove, the utility model proposes the structure of a kind of low noise fan for microwave oven system, its technical scheme is as follows:
The structure of a kind of low noise fan for microwave oven system, it comprises:
Temperature detecting module, this temperature detecting module have the temp probe for monitoring micro-wave oven heating components and parts heating situation, and the pop one's head in temperature detection end of detected data of output temperature;
Drive circuit is connected in the current loop of fan, has according to its external signal to change a drive end of controlling described rotation speed of the fan variation; And
Control circuit is connected in described temperature detection end and drive end; This control circuit has a presetting module, and this presetting module has the power detection end of this micro-wave oven actual power information of collection.
The improvement of this programme has:
In the preferred version, described temp probe comprises a switching device probe that is arranged on this micro-wave oven electronic switching device.
In the preferred version, described temp probe also comprises one or more following combinations:
The electric power loop probe is arranged on the microwave oven supply power loop;
Environment is popped one's head in, and is arranged on the circuit board at described electric power loop and described electronic switching device place;
The magnetron temp probe is arranged on the microwave oven magnetic housing.
In the preferred version, described drive circuit comprises a driving tube, and this driving tube is electronic switching device, and its control utmost point is communicated with described drive end; Its current control loop is connected in the electric current or control loop of described fan electromotor.
In the preferred version, described drive circuit comprises a driving tube, and this driving tube is electronic switching device, and its control utmost point is communicated with described drive end; Its current control loop is series at the input stage of a current conversion device; The output stage of this current conversion device is coupled in its input stage, and is series in the current loop or control loop of described its motor of fan.
In the preferred version, described control circuit comprises a speed adjusting module, and this speed adjusting module is connected in described drive end; This speed adjusting module is for cutting phase chopping regulating speed module, variable duty ratio speed adjusting module or frequency control module.
In the preferred version, comprise thermistor or temperature detect switch (TDS) in the described temp probe.
The beneficial effect of this programme has:
This programme has dual control function.According to current microwave power data, fan electromotor is in suitable rotating speed to one side, is lower than 2000 rev/mins, reaches the remarkable noise-reducing effect when micro-wave oven is worked; On the other hand, the real-time detected temperatures of temperature detecting module obtains the temperature over-range data, and fan motor promotes on the basis of current rotating speed to some extent, till the feedback acknowledgment heat dissipating state that comes from the temperature detection end is good.Rotation speed of the fan is reasonably controlled, and whole fan system has also just had energy-conservation effect, has the ability of handling the burst heating simultaneously.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing embodiment:
Fig. 1 is the structural representation of the utility model embodiment one;
Fig. 2 is the structural representation of the utility model embodiment two;
Fig. 3 is the structural representation of the utility model embodiment three;
Fig. 4 is the structural representation of the utility model embodiment four;
Fig. 5 is the structural representation of the utility model embodiment five.
The specific embodiment
Embodiment one:
As shown in Figure 1, the structural representation of the utility model embodiment one.
The scheme of this embodiment mainly comprises three parts: temperature detecting module 10, drive circuit 30 and control circuit 20.Temperature detecting module 10 has the temp probe that is arranged at micro-wave oven heating components and parts, and this temp probe is the switching device probe 12 that is arranged on the switching device IGBT; This temperature detecting module 10 has temperature detection end 11.
Present embodiment has constituted the dual control function of a fan electromotor M.Power detection end 21 obtains current microwave power data when micro-wave oven is worked on the one hand, according to this information, control circuit 20 can pass through presetting module 22, from corresponding driving signal of microwave power at this moment of drive end 24 outputs, make drive circuit 30 fan motor M-------normal conditions that are in suitable rotating speed, micro-wave oven is not operated at full capacity, so the driving signal of drive end 24 is in fan electromotor M to be lower than 2000 rev/mins rotating speed; Reduce rotation speed of the fan when power is low, improve rotation speed of the fan when the microwave rate is high.When micro-wave oven was started working, control circuit 20 was from 24 1 control signals that make fan electromotor M full speed running of drive end.Changing over to according to temperature detecting module 10 again is main control mode: temperature detecting module 10 detects the temperature of current I GBT in real time by switching device probe 12, if the situation of accident or temperature over-range is arranged, control circuit 20 obtains these data that transfinite from temperature detection end 11, can on the basis of current rotating speed, promote to some extent by drive end 24 fan motor M, till the feedback acknowledgment heat dissipating state that comes from temperature detection end 11 is good.As seen, this programme can make the fan of micro-wave oven be in lower rotating speed according to real work power, has obviously weakened because the noise that the high velocity air that the high rotating speed of fan brings produces experiment showed, that noise reduction is obvious.Therefore, rotation speed of the fan is reasonably controlled, and whole fan system has also just had energy-conservation effect, has the ability of handling the burst heating simultaneously.
Present embodiment also has some other characteristics:
These control circuit 20 inner utilization speed adjusting module 23 are to drive end 24 output data.This speed adjusting module 23 by the different phase place of intercepting drive waveforms, changes the virtual value that drive end 24 drives signal for cutting the phase chopped mode, thus the rotating speed of control motor M.
Embodiment two:
As shown in Figure 2, the structural representation of the utility model embodiment two.
The temperature detecting module 10 of present embodiment also comprises an electric power loop probe 13 except comprising switching device probe 12, this electric power loop probe 13 places the microwave oven supply power loop.Consider semiconductor devices such as having rectifier bridge in the electric power loop; if take place unusual or power when excessive its electric current must increase; cause temperature to rise obviously; so; 13 conducts of electric power loop probe and switching device probe 12 parametric devices that work asynchronously, its feedback data is the final output signal of real-time imaging drive end 24 also.So, temperature detection end 11 can adopt single-line type with embodiment one, because after temperature detecting module 10 can be integrated the data of two temp probes, obtain a comprehensive signal and transfer to control circuit 20; Temperature detection end 11 also can be multiple wire system, with the signal of switching device probe 12 and electric power loop probe 13 input control circuit 20 separately.
Embodiment three:
As shown in Figure 3, the schematic diagram of the utility model embodiment three.
Than embodiment two, the temperature detecting module 10 of present embodiment also has switching device probe 12 and electric power loop probe 13; The internal structure of control circuit 20 is also similar simultaneously.
Main difference is drive circuit.The drive circuit of present embodiment comprises a driving tube Q1, and this driving tube 1 is the transistor-type electronic switching device, and it controls the utmost point, and namely base stage is communicated with drive end 24 by resistance R 2; Its current control loop, namely collector and emitter is series at the input stage of a current conversion device U1; The output stage of this current conversion device is coupled in its input stage, and is series in the control loop of described its motor of fan, and control loop has comprised T1, R and C.This scheme can be used the ac fan of 220V, so adopted current conversion device U1 to be isolated.
Embodiment four:
As shown in Figure 4, the structural representation of the utility model embodiment four.The drive circuit 30 of present embodiment and control circuit 20 parts all are similar to the respective modules among the embodiment three; Different is, have three temp probes in the temperature detecting module 10 of present embodiment, except switching device probe 12, electric power loop probe 13, also has an environment probe 13, it is arranged on the circuit board at electric power loop and electronic switching device place, as many one heavy reference, another part temperature data of feedback entire circuit has improved temperature controlled reliability.Speed adjusting module 23 in the present embodiment control circuit 20 is the frequency control module.
Embodiment five:
As shown in Figure 5, the structural representation of the utility model embodiment five.Present embodiment and embodiment four are similar, have three temp probes in the temperature detecting module 10.Simultaneously control circuit 20 is also similar, and different is, drive circuit 30 comprises a driving tube Q1, and this driving tube Q1 is the transistor electronic switching device, and its control utmost point is communicated with drive ends 24 by resistance R 2; Its current control loop is that collector and emitter is connected in the control loop of fan electromotor M, because fan electromotor M adopts bidirectional triode thyristor T1 control.Wherein T1 and Q1 arrange altogether, need not to isolate.This circuit is simple than embodiment four, and drive current is big.
The above, it only is the utility model preferred embodiment, so can not limit the scope that the utility model is implemented according to this, i.e. the equivalence of doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model contains.
Claims (7)
1. the structure of a low noise fan for microwave oven system is characterized in that it comprises:
Temperature detecting module, this temperature detecting module have the temp probe for monitoring micro-wave oven heating components and parts heating situation, and the temperature detection end of exporting data that this temp probe detects;
Drive circuit is connected in the current loop of fan, has according to its external signal to change a drive end of controlling the rotation speed of the fan variation;
Control circuit is connected in temperature detection end and drive end; This control circuit has a presetting module, and this presetting module contains the power detection end of collecting this micro-wave oven actual power information.
2. according to the structure of the described a kind of low noise fan for microwave oven of claim 1 system, it is characterized in that: described temp probe comprises a switching device probe that is arranged on this micro-wave oven electronic switching device.
3. according to the structure of the described a kind of low noise fan for microwave oven of claim 2 system, it is characterized in that: described temp probe also comprises one or more following combinations:
The electric power loop probe is arranged on the microwave oven supply power loop;
Environment is popped one's head in, and is arranged on the circuit board at described electric power loop and described electronic switching device place;
The magnetron temp probe is arranged on the microwave oven magnetic housing.
4. according to the structure of the described a kind of low noise fan for microwave oven of claim 1 system, it is characterized in that: described drive circuit comprises a driving tube, and this driving tube is electronic switching device, and its control utmost point is communicated with described drive end; Its current control loop is connected in the electric current or control loop of described fan electromotor.
5. according to the structure of the described a kind of low noise fan for microwave oven of claim 1 system, it is characterized in that: described drive circuit comprises a driving tube, and this driving tube is electronic switching device, and its control utmost point is communicated with described drive end; Its current control loop is series at the input stage of a current conversion device; The output stage of this current conversion device is coupled in its input stage, and is series in the current loop or control loop of described its motor of fan.
6. according to the structure of claim 1 or 2 or 3 or 4 or 5 described a kind of low noise fan for microwave oven systems, it is characterized in that: described control circuit comprises a speed adjusting module, and this speed adjusting module is connected in described drive end; This speed adjusting module is for cutting phase chopping regulating speed module, variable duty ratio speed adjusting module or frequency control module.
7. according to the structure of the described a kind of low noise fan for microwave oven of claim 6 system, it is characterized in that: comprise thermistor or temperature detect switch (TDS) in the described temp probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320213013 CN203177247U (en) | 2013-04-24 | 2013-04-24 | Structure of low noise fan system of microwave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320213013 CN203177247U (en) | 2013-04-24 | 2013-04-24 | Structure of low noise fan system of microwave oven |
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| CN203177247U true CN203177247U (en) | 2013-09-04 |
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| CN 201320213013 Expired - Fee Related CN203177247U (en) | 2013-04-24 | 2013-04-24 | Structure of low noise fan system of microwave oven |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103715966A (en) * | 2013-12-18 | 2014-04-09 | 合肥荣事达三洋电器股份有限公司 | Microwave oven fan motor mute control method |
| ES2716448A1 (en) * | 2017-11-08 | 2019-06-12 | Bsh Electrodomesticos Espana Sa | DOMESTIC APPLIANCE DEVICE (Machine-translation by Google Translate, not legally binding) |
-
2013
- 2013-04-24 CN CN 201320213013 patent/CN203177247U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103715966A (en) * | 2013-12-18 | 2014-04-09 | 合肥荣事达三洋电器股份有限公司 | Microwave oven fan motor mute control method |
| ES2716448A1 (en) * | 2017-11-08 | 2019-06-12 | Bsh Electrodomesticos Espana Sa | DOMESTIC APPLIANCE DEVICE (Machine-translation by Google Translate, not legally binding) |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130904 Termination date: 20210424 |
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| CF01 | Termination of patent right due to non-payment of annual fee |