A kind of energy saving microwave oven of low standby power loss
Technical field
The utility model relates to a kind of electromagnetic oven, is specially a kind of energy saving microwave oven of low standby power loss.
Background technology
At present, most of electromagnetic ovens have idle function in use, do not carry out and idle function is actually electromagnetic oven a kind of state that heating work consumes electric energy.The client often ignores this state when using electromagnetic oven, do not cut off the electricity supply after electromagnetic oven uses end, causes waste of energy.The energy-saving and emission-reduction of advocating in order to respond country, low-carbon (LC) is lived, and comprises the household electrical appliance of electromagnetic oven, need need to be resolved hurrily in holding state decline low energy consumption.
The utility model content
For problems of the prior art, the purpose of this utility model is to provide a kind of technical scheme of energy saving microwave oven of low standby power loss.
the energy saving microwave oven of described a kind of low standby power loss, civil power connects respectively IGBT and power switch power circuit through the commercial power rectification filter circuit, the power switch power circuit connects respectively the 18V fan drive circuit, 18V IGBT drive circuit and MCU control circuit, the MCU control circuit connects respectively 18V fan drive circuit and 18V IGBT drive circuit, 18V IGBT drive circuit is connected with IGBT, IGBT connects the heating load circuit, it is characterized in that between described commercial power rectification filter circuit and IGBT, bridge rectifier being set, major loop ON-OFF control circuit and filter circuit, the major loop ON-OFF control circuit is connected with the MCU control circuit, the power switch power circuit is connected with 18V IGBT drive circuit with the 18V fan drive circuit through the 18V ON-OFF control circuit, and the 18V ON-OFF control circuit is connected with the MCU control circuit.
The energy saving microwave oven of described a kind of low standby power loss is characterized in that described major loop ON-OFF control circuit and 18V ON-OFF control circuit are by relay or controllable silicon or triode composition.
The utility model makes electromagnetic oven reduce power consumption under holding state by introducing major loop ON-OFF control circuit and 18V ON-OFF control circuit, and power-dissipation-reduced is 0.5W-0.6W.
Description of drawings
Fig. 1 is the operation principle block diagram of existing electromagnetic oven;
Fig. 2 is the operation principle block diagram that the utlity model has the energy saving microwave oven of low standby power loss;
In figure: the filter circuit of 1-commercial power rectification, 2-IGBT, 3-heating load circuit, 4-power switch power circuit, 5-18V IGBT drive circuit, the 6-18V fan drive circuit, the 7-MCU control circuit, 8-18V ON-OFF control circuit, 9-major loop ON-OFF control circuit, the 10-bridge rectifier, the 11-filter circuit.
Embodiment
Below in conjunction with Figure of description, the utility model is described further:
The operation principle block diagram of existing electromagnetic oven as shown in Figure 1, civil power connects respectively IGBT2 and power switch power circuit 4 through commercial power rectification filter circuit 1, power switch power circuit 4 connects respectively 18V fan drive circuit 6,18V IGBT drive circuit 5 and MCU control circuit 7, MCU control circuit 7 connects respectively 18V fan drive circuit 6 and 18V IGBT drive circuit 5,18V IGBT drive circuit 5 is connected with IGBT2, IGBT2 connects heating load circuit 3, this structure does not arrange the low standby power loss treatment circuit, and under holding state, power dissipation ratio is larger when reality is used.
Fig. 2 is the operation principle block diagram that the utlity model has the energy saving microwave oven of low standby power loss, it arranges bridge rectifier 10, major loop ON-OFF control circuit 9 and filter circuit 11 between existing commercial power rectification filter circuit 1 and IGBT2, major loop ON-OFF control circuit 9 is connected with MCU control circuit 7; Power switch power circuit 4 is connected with 18V IGBT drive circuit 5 with 18V fan drive circuit 6 through 18V ON- OFF control circuit 8, and 18V ON-OFF control circuit 8 is connected with MCU control circuit 7.Major loop ON-OFF control circuit 9 and 18V ON-OFF control circuit 8 are by relay or controllable silicon or triode composition.
The major loop ON-OFF control circuit is connected between bridge rectifier and filter circuit, when electromagnetic oven during at holding state, the MCU control circuit provides signal makes the major loop ON-OFF control circuit be in off-state, because filter circuit is comprised of energy storage components and parts inductance and electric capacity, electromagnetic oven is when holding state, energy storage components and parts inductance and electric capacity can't accumulation of energy, therefore effective stand-by power consumptions that reduces.
The 18V ON-OFF control circuit is connected with 18V IGBT drive circuit with the 18V fan drive circuit respectively, when electromagnetic oven during at holding state, the MCU control circuit provides signal makes the 18V ON-OFF control circuit be in off-state, cut off 18V fan drive circuit and 18V IGBT drive circuit, therefore can effectively reduce stand-by power consumption.
Electromagnetic oven is opened the power switch power circuit when carrying out the normal heating operation, the MCU control circuit is controlled major loop ON-OFF control circuit and the conducting of 18V ON-OFF control circuit, makes the electromagnetic oven normal operation.