CN2434782Y - Timer of microwave oven - Google Patents

Abstract

The utility model relates to a timer of a microwave oven. The utility model is characterized in that a relay switch is removed from a switch circuit of the existing timer; a terminal 9 is added on a microswitch K4 of the switch circuit of the timer, so that the normally open microswitch K4 is changed into a normally closed microswitch; a terminal 5 is added on a reed switch K2, so that the reed switch K2 changed into a two-way switch from a one-way switch. The design proposal can completely meet the requirement of timing control of dual-purpose stoves for microwave and barbecues and simplify the switch circuit of the timer of a microwave oven, so that the utility model can be more reasonable; the reliability of the complete machine is improved, and the manufacturing cost of microwave ovens is reduced.

Description

The microwave oven timer

The utility model relates to timer, especially a kind of microwave oven timer that is applicable to the tool baking function.

At present, microwave oven is adopted by a lot of families as a kind of novel heating appliances, and for enlarging the use of microwave ovens function, businessman is combined in baking box on the microwave oven, makes it to become a kind of microwave oven of tool baking function.Usually having installed on the dual-purpose microwave oven of machinery control can be independently or the microwave oven timer of controlled microwave stove function and baking function alternately, and this microwave oven timer is for satisfying: independently the controlling of microwave power output; The independent control of roasting power output; The alternately control of microwave, roasting power output.Must be on the connection line of timer and microwave a relay (see figure 2) in parallel.Its operation principle is: the independent control of (1) microwave power power: timer passes through the time Control Shaft reed switch K1 closure, the terminal 1 of reed switch K1 and 2 conductings; By the power division axle sensitive switch K3 is opened, the terminal 5 of sensitive switch 3 and 6 open circuits, sensitive switch K4 closure, terminal 7,8 conductings of sensitive switch K4, because of sensitive switch K3 open circuit, so the terminal 9 of relay switch K5 and 10 is open circuit no matter circuit whether, is roasted in conducting, does not have roasting power output; Microwave circuit conducting this moment has microwave power output.When reed switch K1 and K2 are closed, microwave power output is arranged, when reed switch K1 and K2 opened, no microwave power was exported.(2) the independent control of roasting power output: timer passes through the time Control Shaft reed switch K1 closure, the terminal 1 of reed switch K1 and 2 conductings; Sensitive switch K3 closure, the terminal 5 of sensitive switch K3 and 6 conductings are opened sensitive switch K4 simultaneously by the power division axle, the terminal 7 of sensitive switch K4 and 8 open circuits, because of sensitive switch K4 open circuit, whether are the terminal 3 of reed switch K2 and 4 conductings, and microwave power all can not exported.Because of sensitive switch K4 open circuit, the relay switch K5 release of opening a way, the terminal 9 of relay switch K5 and 10 closures.At this moment, the barbecue circuit turn-on has roasting power output.And control by reed switch K1 simultaneously: when reed switch K1 is closed, roasting power output is arranged; When reed switch K1 opens, no roasting power output.Thereby realize independence control to roasting power of microwave oven.

(3) the alternately control of output of microwave, roasting power: timer passes through the time Control Shaft reed switch K1 closure, the terminal 1 of reed switch K1 and 2 conductings; By the power division axle sensitive switch K3 closure, the terminal 5 of sensitive switch K3 and 6 conductings, simultaneously sensitive switch K4 closure, the terminal 7 of sensitive switch K4 and 8 conductings.At this moment, when reed switch K2 closure, the terminal 3 of reed switch K2 and 4 conductings, the microwave circuit conducting has microwave power output.Reed switch K2 closure, the relay switch K5 adhesive of switching on, the terminal 9 and 10 of relay switch K5 is opened, and the barbecue open circuit does not have roasting power output; K2 opens when reed switch, the terminal 3 of reed switch K2 and 4 open circuits, and relay switch K5 releases of cut off the power supply, the terminal 9 of relay switch K5 and 10 closures are roasted circuit turn-on, have roasting power to export.Reed switch K2 opens, and the microwave circuit open circuit does not have microwave power output.Timer is by the closed of reed switch K2 or open the output of controlled microwave power or roasting power output.Thereby realize the alternately control of two kinds of different heating modes.

The timer of this structure, though can satisfy the timing controlled of microwave, barbecue dual-purpose stove, but the circuit that this timer adopted is unreasonable, the higher relay switch of price makes the corresponding raising of cost of microwave oven, and relay can influence the complete machine reliability of operation of dual-purpose microwave oven as the control switch of timer.

The purpose of this utility model is the deficiency that exists at above-mentioned dual-purpose timer, provide a kind of simple in structure, operation control is reliable, the microwave oven timer that is applicable to the tool baking function.

The utility model microwave oven timer, comprise: by the reed switch K1 of time Control Shaft control, by sensitive switch K3, the sensitive switch K4 of power division axle control, by synchronous machine and the concavo-convex reed switch K2 that takes turns control, it is characterized in that: sensitive switch K4 to be to increase the mode of a terminal 9, makes sensitive switch K4 change into normal open and close type sensitive switch by open in usual; Reed switch K2 makes reed switch K2 change into two-way switch by one-way switch to increase the mode of a terminal 5.

The design principle of microwave oven timer of the present utility model is: change the function of each switch in the prior art by the mode that increases contravention, make the sensitive switch K4 in the timer switch circuit change into normal open and close type sensitive switch by open in usual; Reed switch K2 changes into two-way switch by one-way switch.Replace the function of former timer switching circuit repeat circuit switch with this.This design both can satisfy the timing controlled requirement of microwave, barbecue dual-purpose stove fully, and had simplified the switching circuit of microwave oven timer, made it more reasonable, had improved the reliability of complete machine.Reduced the manufacturing cost of microwave oven again.

The concrete structure of microwave oven timer of the present utility model is provided in detail by the following drawings and embodiment.

Fig. 1 is a microwave oven timer switch circuit diagram;

Fig. 2 is existing microwave oven timer switch circuit diagram.

Embodiment: the switching circuit that can be clear that the utility model microwave oven timer from Fig. 1 comprises: by the reed switch K1 of time Control Shaft control, by the sensitive switch K3 of power division axle control, sensitive switch K4, by synchronous machine and the concavo-convex reed switch K2 that takes turns control, sensitive switch K4 go up to increase the terminal 9 of may command barbecue operation, makes sensitive switch K4 change into normal open and close type sensitive switch by open in usual; Reed switch K2 links to each other with 3 terminals 6 of sensitive switch K to increase by a terminal 5, makes reed switch K2 change into two-way switch by one-way switch.

The course of work of the various function controls of the utility model microwave oven timer is:

The independent control of microwave power output: timer makes reed switch K1 closure on the switching circuit, the terminal 1 of reed switch K1 and 2 conductings by the time Control Shaft; By the power division axle sensitive switch K3 is opened, the terminal 6 of sensitive switch K3 and 7 one-tenth open circuits make sensitive switch K4 closure simultaneously, the terminal 8 of sensitive switch K4 and 10 conductings, and be open circuit because of sensitive switch K3 this moment, so the barbecue circuit is open circuit; When reed switch K2 transfers terminal 3 with terminal 5 closures to by terminal 3 and 4 closures, because sensitive switch K3 is for open circuit, so roasting power can not exported.When the terminal 3 of reed switch K2 and 4 conductings, the microwave circuit conducting causes the output of microwave power.And simultaneously by the terminal 1 and 2 of reed switch K1, the terminal 3 of reed switch K2 and 4 is controlled.

The independent control of roasting power output: timer passes through the time Control Shaft reed switch K1 closure, the terminal 1 of reed switch K1 and 2 conductings; Sensitive switch K3 closure, the terminal 6 of sensitive switch K3 and 7 conductings are opened sensitive switch K4 simultaneously by the power division axle, the terminal 8 of sensitive switch K4 and 9 conductings, barbecue circuit turn-on output roasting power.K4 opens because of sensitive switch, the terminal 8 of sensitive switch K4 and 10 open circuits, the terminal 3 of reed switch K2 and 4 or terminal 3 and 5 regardless of state, microwave circuit is open circuit, does not have microwave power output.At this moment, control the output of roasting power by reed switch K1.Realization is to the independence control of roasting power of microwave oven.

The alternately control of output of microwave, roasting power: timer passes through the time Control Shaft reed switch K1 closure, the terminal 1 of reed switch K1 and 2 conductings; By the power division axle sensitive switch K3 closure, the terminal 6 of sensitive switch K3 and 7 conductings, simultaneously sensitive switch K4 closure, the terminal 8 of sensitive switch K4 and 10 conductings, terminal 8 and 9 is opened a way; At this moment, when the terminal 3 of reed switch K2 and 4 when closed, microwave circuit conducting, because of terminal 8 and 9 open circuits of sensitive switch K4, the barbecue open circuit is so have only microwave power output this moment; When the terminal 3 of reed switch K2 and 5 when closed, terminal 3 and 4 open circuits, the microwave circuit open circuit, and the barbecue circuit turn-on has only roasting power output this moment.Timer is by terminal 3 and 5 conductings (being terminal 3 and 4 this moments open circuit) output of controlled microwave power or the output of roasting power of terminal 3 and 4 conductings (being terminal 3 and 5 this moments open circuit) or the reed switch K2 of reed switch K2.Thereby realize the alternately control of microwave, two kinds of power outputs of barbecue.

Claims (1)

1, a kind of microwave oven timer, comprise: by the reed switch K1 of time Control Shaft control, by the sensitive switch K3 and the K4 of power division axle control, by synchronous machine and the concavo-convex reed switch K2 that takes turns control, it is characterized in that: sensitive switch K4 to be to increase the mode of a terminal (9), makes sensitive switch K4 change into normal open and close type sensitive switch by open in usual; Reed switch K2 makes reed switch K2 change into two-way switch by one-way switch to increase the mode of a terminal (5).