CN204351594U - For water level detection circuit and the cooking apparatus of cooking apparatus - Google Patents
For water level detection circuit and the cooking apparatus of cooking apparatus Download PDFInfo
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- CN204351594U CN204351594U CN201520029847.2U CN201520029847U CN204351594U CN 204351594 U CN204351594 U CN 204351594U CN 201520029847 U CN201520029847 U CN 201520029847U CN 204351594 U CN204351594 U CN 204351594U
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- sectional pressure
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Abstract
The utility model provides a kind of water level detection circuit for cooking apparatus and a kind of cooking apparatus, wherein, for the water level detection circuit of cooking apparatus, comprise: probe circuit, comprise the first probe and the second probe, first probe is connected to the first dc source by the first sectional pressure element, the second probe ground connection; The second sectional pressure element be connected in series and the 3rd sectional pressure element, be connected between the first dc source and ground after the second sectional pressure element and the series connection of the 3rd sectional pressure element; Comparator, the first input end of comparator is connected between the first probe and the first sectional pressure element, and the second input of comparator is connected between the second sectional pressure element and the 3rd sectional pressure element; Testing circuit, is connected to the output of described comparator, determines whether described probe circuit detects water level by the output signal detecting described comparator.The bubble that the technical solution of the utility model can accurately and effectively produce to the water level in cooking apparatus or when seething with excitement detects.
Description
Technical field
The utility model relates to water level detecting technical field, in particular to a kind of water level detection circuit for cooking apparatus and a kind of cooking apparatus.
Background technology
Existing cooking apparatus, as electric pressure cooking saucepan, electric cooker etc., in order to avoid heating power is excessive and cause spilling, need to arrange water level detection circuit in cooking apparatus, to detect the bubble produced when the water level in cooking apparatus or boiling, and how can accurately and effectively realize detecting the water level in cooking apparatus or bubble becoming technical problem urgently to be resolved hurrily.
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 be to propose a kind of can accurately and effectively to the water level detection circuit for cooking apparatus that the bubble produced when the water level in cooking apparatus or boiling detects.
Another object of the present utility model is to propose a kind of cooking apparatus.
For achieving the above object, according to the embodiment of first aspect of the present utility model, propose a kind of water level detection circuit for cooking apparatus, comprise: probe circuit, comprise the first probe and the second probe, described first probe is connected to the first dc source by the first sectional pressure element, described second probe ground connection; The second sectional pressure element be connected in series and the 3rd sectional pressure element, be connected between described first dc source and ground after described second sectional pressure element and described 3rd sectional pressure element series connection; Comparator, the first input end of described comparator is connected between described first probe and described first sectional pressure element, and the second input of described comparator is connected between described second sectional pressure element and described 3rd sectional pressure element; Testing circuit, is connected to the output of described comparator, determines whether described probe circuit detects water level by the output signal detecting described comparator.
According to the water level detection circuit for cooking apparatus of embodiment of the present utility model, by arranging comparator, and the first input end of comparator is connected between the first probe and the first sectional pressure element, second input of comparator is connected between the second sectional pressure element and the 3rd sectional pressure element, make water level not detected at probe circuit, namely when the first probe is not connected by water with the second probe, the first input end voltage of comparator is greater than the second input terminal voltage of comparator, and when probe circuit detects water level, first probe is connected by water with the second probe, the first input end voltage of comparator is less than the second input terminal voltage of comparator, and then the outputs level signals of comparator is reversed, therefore can determine whether probe circuit detects water level exactly by the output signal of detection comparator.
According to the water level detection circuit for cooking apparatus of above-described embodiment of the present utility model, can also following technical characteristic be had:
According to an embodiment of the present utility model, the first input end of described comparator is positive input terminal, and the second input of described comparator is negative input end.
According to the water level detection circuit for cooking apparatus of embodiment of the present utility model, be positive input terminal at the first input end of comparator, when the second input of comparator is negative input end, if probe circuit does not detect water level, then comparator exports high level; If probe circuit detects water level, then comparator output low level.Certainly, in another embodiment of the present utility model, the first input end of comparator also can be negative input end, and the second input of comparator can be positive input terminal.
According to an embodiment of the present utility model, be positive input terminal at the first input end of comparator, when second input of comparator is negative input end, described testing circuit comprises: photo-coupler, the first input end of described photo-coupler is connected to described first dc source, second input of described photo-coupler is connected to the output of described comparator, first output of described photo-coupler is connected to the second dc source by the 4th sectional pressure element, the second output head grounding of described photo-coupler; Microprocessor, the sampled signal input of described microprocessor is connected between described 4th sectional pressure element and the first output of described photo-coupler, according to the input signal of described sampled signal input, described microprocessor determines whether described probe circuit detects water level.
According to the water level detection circuit for cooking apparatus of embodiment of the present utility model, by arranging photo-coupler, make when comparator exports high level, photo-coupler ends, and the input signal of the sampled signal input of microprocessor is high level; And when comparator output low level, photo-coupler conducting, the input signal of the sampled signal input of microprocessor is low level, and therefore whether microprocessor can detect water level by the input signal determination probe circuit of sampled signal input.
According to an embodiment of the present utility model, described testing circuit also comprises: the first electric capacity, is connected between the sampled signal input of described microprocessor and ground.
According to an embodiment of the present utility model, the first input end of described comparator is connected between described first probe and described first sectional pressure element by the 5th sectional pressure element; And/or described second probe is by the 6th sectional pressure element ground connection; And/or the first input end of described photo-coupler is connected to described first dc source by the 7th sectional pressure element; And/or the sampled signal input of described microprocessor is connected between described 4th sectional pressure element and the first output of described photo-coupler by the 8th sectional pressure element.
According to an embodiment of the present utility model, described first sectional pressure element, described second sectional pressure element, described 3rd sectional pressure element, described 4th sectional pressure element, described 5th sectional pressure element, described 6th sectional pressure element, described 7th sectional pressure element or described 8th sectional pressure element comprise: single resistive element, or the multiple resistive elements being connected in series and/or being connected in parallel.
According to an embodiment of the present utility model, also comprise: the second electric capacity, between the first input end being connected to described comparator and ground.
According to an embodiment of the present utility model, also comprise: the first terminal is arranged, the first wiring position of described the first terminal row is connected to described first probe, and the second wiring position of described the first terminal row is connected to described second probe; Second terminal block, first wiring position of described second terminal block is connected to described first sectional pressure element, second wiring position ground connection of described second terminal block, the first wiring position that first wiring position and the described the first terminal of described second terminal block are arranged is connected, and the second wiring position that the second wiring position and the described the first terminal of described second terminal block are arranged is connected.
According to the water level detection circuit for cooking apparatus of embodiment of the present utility model, by arranging the first terminal row and the second terminal block, make it possible to realize isolated detection, namely probe circuit and other circuit can be arranged separately, and then the design of circuit board can be convenient to.
According to an embodiment of the present utility model, described probe circuit and described the first terminal row are arranged on first circuit board, and described second terminal block and described comparator are arranged on the second circuit board.
According to the embodiment of the utility model second aspect, also proposed a kind of cooking apparatus, comprising: the water level detection circuit for cooking apparatus described in above-mentioned any one embodiment.
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 structural representation of the water level detection circuit for cooking apparatus according to first embodiment of the present utility model;
Fig. 2 shows the structural representation of the water level detection circuit for cooking apparatus according to second embodiment of the present utility model.
Detailed description of the invention
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 domain of the present utility model is not by the restriction of following public specific embodiment.
As depicted in figs. 1 and 2, according to the water level detection circuit for cooking apparatus of embodiment of the present utility model, comprise: probe circuit 1, comprise the first probe 11 and the second probe 12, described first probe 11 is connected to the first dc source (i.e. VCC) by the first sectional pressure element 21, described second probe 12 ground connection; The second sectional pressure element 22 be connected in series and the 3rd sectional pressure element 23, described second sectional pressure element 22 and described 3rd sectional pressure element 23 are connected between described first dc source and ground after connecting; Comparator 3, the first input end of described comparator 3 is connected between described first probe 11 and described first sectional pressure element 21, and the second input of described comparator 3 is connected between described second sectional pressure element 22 and described 3rd sectional pressure element 23; Testing circuit 4, is connected to the output of described comparator 3, determines whether described probe circuit 1 detects water level by the output signal detecting described comparator 3.
By arranging comparator 3, and the first input end of comparator 3 is connected between the first probe 11 and the first sectional pressure element, second input of comparator 3 is connected between the second sectional pressure element 22 and the 3rd sectional pressure element 23, make water level not detected at probe circuit 1, namely when the first probe 11 is not connected by water with the second probe 12, the first input end voltage of comparator 3 is greater than the second input terminal voltage of comparator 3, and when probe circuit 1 detects water level, first probe 11 is connected by water with the second probe 12, the first input end voltage of comparator 3 is less than the second input terminal voltage of comparator 3, and then the outputs level signals of comparator 3 is reversed, therefore can determine whether probe circuit 1 detects water level exactly by the output signal of detection comparator 3.
According to the water level detection circuit for cooking apparatus of above-described embodiment of the present utility model, can also following technical characteristic be had:
According to an embodiment of the present utility model, the first input end of described comparator 3 is positive input terminal, and the second input of described comparator 3 is negative input end.
Be positive input terminal at the first input end of comparator 3, when the second input of comparator 3 is negative input end, if probe circuit 1 does not detect water level, then comparator 3 exports high level; If probe circuit 1 detects water level, then comparator 3 output low level.Certainly, in another embodiment of the present utility model, the first input end of comparator 3 also can be negative input end, and the second input of comparator 3 can be positive input terminal.
According to an embodiment of the present utility model, be positive input terminal at the first input end of comparator 3, when second input of comparator 3 is negative input end, described testing circuit 4 comprises: photo-coupler 41, the first input end of described photo-coupler 41 is connected to described first dc source, second input of described photo-coupler 41 is connected to the output of described comparator 3, first output of described photo-coupler 41 is connected to the second dc source (i.e. VDD) by the 4th sectional pressure element 24, the second output head grounding of described photo-coupler 41; Microprocessor 43, the sampled signal input of described microprocessor 43 is connected between described 4th sectional pressure element 24 and the first output of described photo-coupler 41, according to the input signal of described sampled signal input, described microprocessor 43 determines whether described probe circuit 1 detects water level.
By arranging photo-coupler 41, make when comparator 3 exports high level, photo-coupler 41 ends, and the input signal of the sampled signal input of microprocessor 43 is high level; And when comparator 3 output low level, photo-coupler 41 conducting, the input signal of the sampled signal input of microprocessor 43 is low level, and therefore whether microprocessor 43 can detect water level by the input signal determination probe circuit 1 of sampled signal input.
According to an embodiment of the present utility model, described testing circuit 4 also comprises: the first electric capacity 44, between the sampled signal input being connected to described microprocessor 43 and ground.
According to an embodiment of the present utility model, the first input end of described comparator 3 is connected between described first probe 11 and described first sectional pressure element 21 by the 5th sectional pressure element 25; And/or described second probe 12 is by the 6th sectional pressure element 26 ground connection; And/or the first input end of described photo-coupler 41 is connected to described first dc source by the 7th sectional pressure element 27; And/or the sampled signal input of described microprocessor 43 is connected between described 4th sectional pressure element 24 and the first output of described photo-coupler 41 by the 8th sectional pressure element 28.
According to an embodiment of the present utility model, described first sectional pressure element 21, described second sectional pressure element 22, described 3rd sectional pressure element 23, described 4th sectional pressure element 24, described 5th sectional pressure element 25, described 6th sectional pressure element 26, described 7th sectional pressure element 27 or described 8th sectional pressure element 28 comprise: single resistive element, or the multiple resistive elements being connected in series and/or being connected in parallel.
According to an embodiment of the present utility model, also comprise: the second electric capacity 5, between the first input end being connected to described comparator 3 and ground.
According to an embodiment of the present utility model, as shown in Figure 2, also comprise: the first terminal row 6, the first wiring position of described the first terminal row 6 is connected to described first probe 11, and the second wiring position of described the first terminal row 6 is connected to described second probe 12; Second terminal block 7, first wiring position of described second terminal block 7 is connected to described first sectional pressure element 21, second wiring position ground connection of described second terminal block 7, the first wiring position that first wiring position and the described the first terminal of described second terminal block 7 arrange 6 is connected, the second wiring position that second wiring position and the described the first terminal of described second terminal block 7 arrange 6 is connected (arranging 6 and second terminal block 7, the annexation between not shown the first terminal row 6 and the second terminal block 7 for ease of expressing the first terminal in figure).
By arranging the first terminal row 6 and the second terminal block 7, making it possible to realize isolated detection, namely probe circuit 1 and other circuit can be arranged separately, and then the design of circuit board can be convenient to.
According to an embodiment of the present utility model, described probe circuit 1 and described the first terminal row 6 are arranged on first circuit board, and described second terminal block 7 and described comparator 3 are arranged on the second circuit board.
The utility model also proposed a kind of cooking apparatus (not shown), comprising: the water level detection circuit for cooking apparatus as shown in Figure 1 or 2.
More than be described with reference to the accompanying drawings the technical solution of the utility model, the utility model proposes a kind of water level detection circuit for cooking apparatus newly, the bubble that can accurately and effectively produce to the water level in cooking apparatus or when seething with excitement detects.
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 domain of the present utility model.
Claims (10)
1. for a water level detection circuit for cooking apparatus, it is characterized in that, comprising:
Probe circuit, comprises the first probe and the second probe, and described first probe is connected to the first dc source by the first sectional pressure element, described second probe ground connection;
The second sectional pressure element be connected in series and the 3rd sectional pressure element, be connected between described first dc source and ground after described second sectional pressure element and described 3rd sectional pressure element series connection;
Comparator, the first input end of described comparator is connected between described first probe and described first sectional pressure element, and the second input of described comparator is connected between described second sectional pressure element and described 3rd sectional pressure element;
Testing circuit, is connected to the output of described comparator, determines whether described probe circuit detects water level by the output signal detecting described comparator.
2. the water level detection circuit for cooking apparatus according to claim 1, is characterized in that, the first input end of described comparator is positive input terminal, and the second input of described comparator is negative input end.
3. the water level detection circuit for cooking apparatus according to claim 2, is characterized in that, described testing circuit comprises:
Photo-coupler, the first input end of described photo-coupler is connected to described first dc source, second input of described photo-coupler is connected to the output of described comparator, first output of described photo-coupler is connected to the second dc source by the 4th sectional pressure element, the second output head grounding of described photo-coupler;
Microprocessor, the sampled signal input of described microprocessor is connected between described 4th sectional pressure element and the first output of described photo-coupler, according to the input signal of described sampled signal input, described microprocessor determines whether described probe circuit detects water level.
4. the water level detection circuit for cooking apparatus according to claim 3, is characterized in that, described testing circuit also comprises:
First electric capacity, is connected between the sampled signal input of described microprocessor and ground.
5. the water level detection circuit for cooking apparatus according to claim 3, is characterized in that:
The first input end of described comparator is connected between described first probe and described first sectional pressure element by the 5th sectional pressure element; And/or
Described second probe is by the 6th sectional pressure element ground connection; And/or
The first input end of described photo-coupler is connected to described first dc source by the 7th sectional pressure element; And/or
The sampled signal input of described microprocessor is connected between described 4th sectional pressure element and the first output of described photo-coupler by the 8th sectional pressure element.
6. the water level detection circuit for cooking apparatus according to claim 5, it is characterized in that, described first sectional pressure element, described second sectional pressure element, described 3rd sectional pressure element, described 4th sectional pressure element, described 5th sectional pressure element, described 6th sectional pressure element, described 7th sectional pressure element or described 8th sectional pressure element comprise:
Single resistive element, or the multiple resistive elements being connected in series and/or being connected in parallel.
7. the water level detection circuit for cooking apparatus according to claim 1, is characterized in that, also comprise:
Second electric capacity, between the first input end being connected to described comparator and ground.
8. the water level detection circuit for cooking apparatus according to any one of claim 1 to 7, is characterized in that, also comprise:
The first terminal is arranged, and the first wiring position of described the first terminal row is connected to described first probe, and the second wiring position of described the first terminal row is connected to described second probe;
Second terminal block, first wiring position of described second terminal block is connected to described first sectional pressure element, second wiring position ground connection of described second terminal block, the first wiring position that first wiring position and the described the first terminal of described second terminal block are arranged is connected, and the second wiring position that the second wiring position and the described the first terminal of described second terminal block are arranged is connected.
9. the water level detection circuit for cooking apparatus according to claim 8, is characterized in that, described probe circuit and described the first terminal row are arranged on first circuit board, and described second terminal block and described comparator are arranged on the second circuit board.
10. a cooking apparatus, is characterized in that, comprising: as claimed in any one of claims 1-9 wherein for the water level detection circuit of cooking apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520029847.2U CN204351594U (en) | 2015-01-15 | 2015-01-15 | For water level detection circuit and the cooking apparatus of cooking apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520029847.2U CN204351594U (en) | 2015-01-15 | 2015-01-15 | For water level detection circuit and the cooking apparatus of cooking apparatus |
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| Publication Number | Publication Date |
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| CN204351594U true CN204351594U (en) | 2015-05-27 |
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| CN201520029847.2U Active CN204351594U (en) | 2015-01-15 | 2015-01-15 | For water level detection circuit and the cooking apparatus of cooking apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110876564A (en) * | 2018-09-05 | 2020-03-13 | 佛山市顺德区美的电热电器制造有限公司 | Cooking appliance control method and system and cooking appliance |
-
2015
- 2015-01-15 CN CN201520029847.2U patent/CN204351594U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110876564A (en) * | 2018-09-05 | 2020-03-13 | 佛山市顺德区美的电热电器制造有限公司 | Cooking appliance control method and system and cooking appliance |
| CN110876564B (en) * | 2018-09-05 | 2021-09-21 | 佛山市顺德区美的电热电器制造有限公司 | Cooking appliance control method and system and cooking appliance |
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