CN204104163U - impulse current control circuit and microwave oven - Google Patents
impulse current control circuit and microwave oven Download PDFInfo
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- CN204104163U CN204104163U CN201420565647.4U CN201420565647U CN204104163U CN 204104163 U CN204104163 U CN 204104163U CN 201420565647 U CN201420565647 U CN 201420565647U CN 204104163 U CN204104163 U CN 204104163U
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- impulse current
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Abstract
The utility model provides a kind of impulse current control circuit and microwave oven, and wherein, impulse current control circuit comprises: microwave pad, and first end is connected to the first output of AC power; Microwave relay, first input end is connected to the second output of AC power, and the second input is connected to the second end of microwave pad; Testing circuit, is connected to microwave relay, detects the closing time of microwave relay, and closing time is sent to control circuit; Switching circuit, is connected to microwave relay, controls the turn-on and turn-off of microwave relay according to the control signal from control circuit received; Control circuit, is connected to switching circuit and testing circuit, according to closing time to switching circuit transmit button control signal.Correspondingly, the utility model additionally provides a kind of microwave oven.By this technical scheme, the closing time of relay can be detected, thus regulate the closing point of microwave relay according to the closing time of relay, reduce because reasons such as the differences of relay, the problems such as the impulse current caused is excessive.
Description
Technical field
The utility model relates to household electrical appliance technical field, in particular to a kind of impulse current control circuit and a kind of microwave oven.
Background technology
Microwave oven, when microwave starting, because high-tension transformer HVT is perceptual parts, can produce the impulse current arrived very much, if the closing point of relay controls bad, very large impulse current can be produced, thus impact is produced to consumer networks, have influence on other electrical equipment and normally work.
Existing microwave oven does not have relay closes time detection circuit, because the factor of the difference of the operating voltage of the closing time of relay itself and circuit relay electrical equipment, cause the actual closing point of relay and design specification there are differences, and then cause impulse current a bit to go beyond the scope.
Therefore, how accurately control relay closing point, and then control impulse current, become technical problem urgently to be resolved hurrily at present.
Utility model content
The utility model is intended at least to solve one of technical problem existed in prior art or correlation technique.
For this reason, an object of the present utility model is to propose a kind of impulse current control circuit.
Another object of the present utility model is to propose a kind of microwave oven.
For achieving the above object, according to the embodiment of first aspect of the present utility model, propose a kind of impulse current control circuit, for microwave oven, comprising: microwave pad, the first end of described microwave pad is connected to the first output of AC power; Microwave relay, the first input end of described microwave relay is connected to the second output of described AC power, and the second input of described microwave relay is connected to the second end of described microwave pad; Testing circuit, described testing circuit is connected to described microwave relay, for detecting the closing time of described microwave relay, and described closing time is sent to control circuit; Switching circuit, is connected to described microwave relay, controls the turn-on and turn-off of described microwave relay according to the control signal from described control circuit received; Described control circuit, is connected to described switching circuit and described testing circuit, for sending described switch controlling signal according to described closing time to described switching circuit.
According to the impulse current control circuit of the utility model embodiment, the closing time of relay is detected by testing circuit, thus the closing point of microwave relay is regulated according to the closing time of relay, reduce because reasons such as the differences of relay, the problems such as the impulse current caused is excessive.For developer, a large amount of time also need not be spent to improve the problem of impulse current, shorten the development time, ensure that the quality of microwave oven.
In addition, according to the impulse current control circuit of the utility model above-described embodiment, following additional technical characteristic can also be had:
According to an embodiment of the present utility model, described testing circuit comprises: the first signal deteching circuit, between the common port that described first signal deteching circuit is connected to the first end of described microwave pad and the first end of described AC power and ground, for gathering the first voltage signal of described AC power first end, and be sent to described control circuit; Secondary signal testing circuit, between the common port that described secondary signal testing circuit is connected to the second end of described microwave pad and the second input of described microwave relay and ground, for gather described microwave relay close time, second voltage signal of described AC power second end, and be sent to described control circuit; Described control circuit calculates the described closing time of described microwave relay according to described first voltage signal and described second voltage signal.
According to the impulse current control circuit of the utility model embodiment, the zero passage voltage signal of one end (as live wire) of AC power is detected by a signal deteching circuit, the other end of AC power is detected by another signal deteching circuit, the i.e. voltage signal of zero line when relay closes, like this, the closing time of relay can be calculated by the time difference between calculated zero voltage signal and voltage signal, thus the turn-on and turn-off of closing time control relay according to relay, thus reduce because reasons such as the differences of relay, the problems such as the impulse current caused is excessive.For developer, a large amount of time also need not be spent to improve the problem of impulse current, shorten the development time, ensure that the quality of microwave oven.
According to an embodiment of the present utility model, described first testing circuit comprises: the first resistance and the second resistance, and described first resistance is connected with described second resistant series, and the common port of described first resistance and described second resistance is connected to described control circuit; Described secondary signal testing circuit comprises: the 3rd resistance and the 4th resistance, and described 3rd resistance is connected with described 4th resistant series, and the common port of described 3rd resistance and described 4th resistance is connected to described control circuit.
According to an embodiment of the present utility model, described switching circuit comprises: transistor, the first end of described transistor is connected to an output of described microwave relay, and the second end ground connection of described transistor, the control end of described transistor is connected to described control circuit.
According to an embodiment of the present utility model, also comprise: relay protection circuit, described relay protection circuit is connected in parallel between two outputs of described microwave relay.
According to an embodiment of the present utility model, described relay protection circuit comprises diode.
According to an embodiment of the present utility model, described microwave pad comprises: high-tension transformer, high-voltage capacitance, high-voltage diode and magnetron.
Propose a kind of microwave oven according to the embodiment of the utility model second aspect, comprising: the impulse current control circuit according to any one of technique scheme.
According to the microwave oven of the utility model embodiment, the closing time of relay is detected by testing circuit, thus the closing point of microwave relay is regulated according to the closing time of relay, thus reduce because reasons such as the differences of relay, the problems such as the impulse current caused is excessive.For developer, a large amount of time also need not be spent to improve the problem of impulse current, shorten the development time, ensure that the quality of microwave oven.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 shows the schematic block diagram of the impulse current control circuit according to embodiment of the present utility model;
Fig. 2 shows the concrete syndeton schematic diagram of the impulse current control circuit according to an embodiment of the present utility model.
Embodiment
In order to more clearly understand above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with the drawings and specific embodiments, the utility model is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the utility model; but; the utility model can also adopt other to be different from other modes described here and implement, and therefore, protection range of the present utility model is not by the restriction of following public specific embodiment.
Fig. 1 shows the schematic block diagram of the impulse current control circuit according to embodiment of the present utility model.
As shown in Figure 1, according to the impulse current control circuit 100 of embodiment of the present utility model, comprising: microwave pad 104, the first end of described microwave pad 104 is connected to the first output of AC power 102; Microwave relay 106, the first input end of described microwave relay 106 is connected to the second output of described AC power 102, and the second input of described microwave relay 106 is connected to the second end of described microwave pad 104; Testing circuit 108, described testing circuit 108 is connected to described microwave relay 106, for detecting the closing time of described microwave relay 106, and described closing time is sent to control circuit 112; Switching circuit 110, is connected to described microwave relay 106, controls the turn-on and turn-off of described microwave relay 106 according to the control signal from described control circuit 112 received; Described control circuit 112, is connected to described switching circuit 110 and described testing circuit, for sending described switch controlling signal according to described closing time to described switching circuit.
According to the impulse current control circuit 100 of the utility model embodiment, the closing time of relay is detected by testing circuit 108, thus the closing point of microwave relay is regulated according to the closing time of relay, thus reduce because reasons such as the differences of relay, the problems such as the impulse current caused is excessive.For developer, a large amount of time also need not be spent to improve the problem of impulse current, shorten the development time, ensure that the quality of microwave oven.
Preferably, as shown in Figure 2, testing circuit 108 comprises: the first signal deteching circuit 1082, between the common port that described first signal deteching circuit 1082 is connected to the first end of described microwave pad 104 and the first end of described AC power 102 and ground, for gathering the first voltage signal of described AC power 102 first end, and be sent to described control circuit 112; Secondary signal testing circuit 1084, between the common port that described secondary signal testing circuit 1084 is connected to the second end of described microwave pad 104 and the second input of described microwave relay 106 and ground, for gather described microwave relay 106 close time, second voltage signal of described AC power 102 second end, and be sent to described control circuit 112; Described control circuit 112 calculates the described closing time of described microwave relay 106 according to described first voltage signal and described second voltage signal.
According to the impulse current control circuit 100 of the utility model embodiment, the zero passage voltage signal of one end (as live wire) of AC power is detected by a signal deteching circuit, the other end of AC power is detected by another signal deteching circuit, the i.e. voltage signal of zero line when relay closes, like this, the closing time of relay can be calculated by the time difference between calculated zero voltage signal and voltage signal, thus the turn-on and turn-off of closing time control relay according to relay, thus reduce because reasons such as the differences of relay, the problems such as the impulse current caused is excessive.For developer, a large amount of time also need not be spent to improve the problem of impulse current, shorten the development time, ensure that the quality of microwave oven.
Particularly, the first testing circuit 1082 comprises: the first resistance R1 and the second resistance R2, and described first resistance R1 and described second resistance R2 is connected in series, and the common port of described first resistance R1 and described second resistance R2 is connected to described control circuit 112; Described secondary signal testing circuit 1084 comprises: the 3rd resistance R3 and the 4th resistance R4, and described 3rd resistance R3 and described 4th resistance R4 is connected in series, and the common port of described 3rd resistance R3 and described 4th resistance R4 is connected to described control circuit 112.
According to an embodiment of the present utility model, described switching circuit 110 comprises: transistor Q1, the first end of described transistor Q1 is connected to an output of described microwave relay 106, the second end ground connection of described transistor Q1, the control end of described transistor Q1 is connected to described control circuit 112.
According to an embodiment of the present utility model, also comprise: relay protection circuit, described relay protection circuit is connected in parallel between two outputs of described microwave relay.
According to an embodiment of the present utility model, described relay protection circuit comprises diode D2.
According to an embodiment of the present utility model, described microwave pad 104 comprises: high-tension transformer HVT, high-voltage capacitance, high-voltage diode and magnetron.
More than be described with reference to the accompanying drawings the technical solution of the utility model, pass through the technical solution of the utility model, the closing time of relay is detected by testing circuit, thus the closing point of microwave relay is regulated according to the closing time of relay, thus reduce because reasons such as the differences of relay, the problems such as the impulse current caused is excessive.For developer, a large amount of time also need not be spent to improve the problem of impulse current, shorten the development time, ensure that the quality of microwave oven.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (8)
1. an impulse current control circuit, for microwave oven, is characterized in that, comprising:
Microwave pad, the first end of described microwave pad is connected to the first output of AC power;
Microwave relay, the first input end of described microwave relay is connected to the second output of described AC power, and the second input of described microwave relay is connected to the second end of described microwave pad;
Testing circuit, described testing circuit is connected to described microwave relay, for detecting the closing time of described microwave relay, and described closing time is sent to control circuit;
Switching circuit, is connected to described microwave relay, controls the turn-on and turn-off of described microwave relay according to the control signal from described control circuit received;
Described control circuit, is connected to described switching circuit and described testing circuit, for sending described switch controlling signal according to described closing time to described switching circuit.
2. impulse current control circuit according to claim 1, is characterized in that, described testing circuit comprises:
First signal deteching circuit, between the common port that described first signal deteching circuit is connected to the first end of described microwave pad and the first end of described AC power and ground, for gathering the first voltage signal of described AC power first end, and be sent to described control circuit;
Secondary signal testing circuit, between the common port that described secondary signal testing circuit is connected to the second end of described microwave pad and the second input of described microwave relay and ground, for gather described microwave relay close time, second voltage signal of described AC power second end, and be sent to described control circuit;
Described control circuit calculates the described closing time of described microwave relay according to described first voltage signal and described second voltage signal.
3. impulse current control circuit according to claim 2, is characterized in that, described first signal deteching circuit comprises:
First resistance and the second resistance, described first resistance is connected with described second resistant series, and the common port of described first resistance and described second resistance is connected to described control circuit;
Described secondary signal testing circuit comprises:
3rd resistance and the 4th resistance, described 3rd resistance is connected with described 4th resistant series, and the common port of described 3rd resistance and described 4th resistance is connected to described control circuit.
4. impulse current control circuit according to claim 1, is characterized in that, described switching circuit comprises:
Transistor, the first end of described transistor is connected to an output of described microwave relay, and the second end ground connection of described transistor, the control end of described transistor is connected to described control circuit.
5. impulse current control circuit according to claim 1, is characterized in that, also comprise:
Relay protection circuit, described relay protection circuit is connected in parallel between two outputs of described microwave relay.
6. impulse current control circuit according to claim 5, is characterized in that, described relay protection circuit comprises diode.
7. impulse current control circuit according to any one of claim 1 to 6, is characterized in that, described microwave pad comprises:
High-tension transformer, high-voltage capacitance, high-voltage diode and magnetron.
8. a microwave oven, is characterized in that, comprising: the impulse current control circuit according to any one of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420565647.4U CN204104163U (en) | 2014-09-28 | 2014-09-28 | impulse current control circuit and microwave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420565647.4U CN204104163U (en) | 2014-09-28 | 2014-09-28 | impulse current control circuit and microwave oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204104163U true CN204104163U (en) | 2015-01-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420565647.4U Active CN204104163U (en) | 2014-09-28 | 2014-09-28 | impulse current control circuit and microwave oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204104163U (en) |
-
2014
- 2014-09-28 CN CN201420565647.4U patent/CN204104163U/en active Active
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| GR01 | Patent grant |