CN204405142U - 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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- CN204405142U CN204405142U CN201520120443.4U CN201520120443U CN204405142U CN 204405142 U CN204405142 U CN 204405142U CN 201520120443 U CN201520120443 U CN 201520120443U CN 204405142 U CN204405142 U CN 204405142U
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- pressure element
- sectional pressure
- comparer
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Abstract
The utility model provides water level detection circuit for cooking apparatus and cooking apparatus, and water level detection circuit comprises: the first sectional pressure element be connected in series and the second sectional pressure element, and is connected between direct supply and ground after series connection; First comparer, negative input end is by the first capacity earth, and positive input terminal is connected between the first sectional pressure element and the second sectional pressure element; 3rd sectional pressure element, first end is connected to direct supply, and the second end is connected to the output terminal of the first comparer; The 4th sectional pressure element be connected in series and the first diode, and be connected between the negative input end of the first comparer and the second end of the 3rd sectional pressure element after series connection; The 5th sectional pressure element be connected in series and the second diode, and be connected between the negative input end of the first comparer and the second end of the 3rd sectional pressure element after series connection; Probe circuit, is connected in parallel on the two ends of the 4th sectional pressure element; Signal deteching circuit, for detecting the output signal of the first comparer, to determine whether probe circuit detects water level.
Description
Technical field
The utility model relates to cooking apparatus 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 matters urgently to be resolved hurrily.
Utility model content
The utility model is intended at least to solve one of technical matters existed in prior art or correlation technique.
For this reason, an object of the present utility model is to propose a kind of water level detection circuit for cooking apparatus newly, and the bubble that can accurately and effectively produce to the water level in cooking apparatus or when seething with excitement detects.
Another object of the present utility model is correspondingly 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: the first sectional pressure element be connected in series and the second sectional pressure element, be connected between the first direct supply and ground after described first sectional pressure element and described second sectional pressure element series connection; First comparer, the negative input end of described first comparer is by the first capacity earth, and the positive input terminal of described first comparer is connected between described first sectional pressure element and described second sectional pressure element; 3rd sectional pressure element, the first end of described 3rd sectional pressure element is connected to described first direct supply, and the second end of described 3rd sectional pressure element is connected to the output terminal of described first comparer; The 4th sectional pressure element be connected in series and the first diode, be connected between the negative input end of described first comparer and the second end of described 3rd sectional pressure element after described 4th sectional pressure element and described first Diode series, described first diode flows through described 4th sectional pressure element for the electric current limiting described first direct supply; The 5th sectional pressure element be connected in series and the second diode, be connected between the negative input end of described first comparer and the second end of described 3rd sectional pressure element after described 5th sectional pressure element and described second Diode series, described second diode flows through described 5th sectional pressure element for the electric current limiting described first electric capacity; Probe circuit, comprises the first probe and the second probe, and described first probe and described second probe are connected in parallel on the two ends of described 4th sectional pressure element; Signal deteching circuit, is connected to the output terminal of described first comparer, for detecting the output signal of described first comparer, to determine whether described probe circuit detects water level.
According to the water level detection circuit for cooking apparatus of embodiment of the present utility model, because the positive input terminal voltage of the first comparer does not change substantially, and due to the existence of the first electric capacity, the first diode and the second diode, make when the positive input terminal voltage of the first comparer is greater than the negative input end voltage of the first comparer, first comparer exports high level, and the first direct supply is to the first capacitor charging, and after the first capacitor charging completes, the negative input end voltage of the first comparer is higher than the positive input terminal voltage of the first comparer, and then the first comparer output low level, first capacitor discharge, if ignore the pressure drop of the first diode and the second diode, namely ratio then between duration of charging of the first electric capacity and discharge time be the ratio of the resistance of charge circuit and discharge loop, and the resistance of probe circuit when water level being detected and water level do not detected has very large difference, therefore can be determined by the output signal detecting the first comparer whether probe circuit detects water level, particularly, the ratio that can export between the duration of high level signal and the duration of low level signal according to the first comparer determines whether probe circuit detects water level.
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:
Wherein, the particular circuit configurations of signal deteching circuit can have following two embodiments:
Embodiment one:
According to an embodiment of the present utility model, described signal deteching circuit comprises: photo-coupler, the first input end of described photo-coupler is connected to described first direct supply, second input end of described photo-coupler is connected to the output terminal of described first comparer, first output terminal of described photo-coupler is connected to the second direct supply by the 7th sectional pressure element, the second output head grounding of described photo-coupler; Microprocessor, the sampled signal input end of described microprocessor is connected between described 7th sectional pressure element and the first output terminal of described photo-coupler, according to the input signal of described sampled signal input end, described microprocessor determines whether described probe circuit detects water level.
Embodiment two:
According to an embodiment of the present utility model, described signal deteching circuit comprises: driving element, and the input end of described driving element is connected to the output terminal of described first comparer; Photo-coupler, the first input end of described photo-coupler is connected to described first direct supply, second input end of described photo-coupler is connected to the output terminal of described driving element, first output terminal of described photo-coupler is connected to the second direct supply by the 7th sectional pressure element, the second output head grounding of described photo-coupler; Microprocessor, the sampled signal input end of described microprocessor is connected between described 7th sectional pressure element and the first output terminal of described photo-coupler, according to the input signal of described sampled signal input end, described microprocessor determines whether described probe circuit detects water level.
According to an embodiment of the present utility model, described driving element comprises: the second comparer, the negative input end of described second comparer is connected to the output terminal of described first comparer, and described second comparer positive input terminal is connected between described first sectional pressure element and described second sectional pressure element.In addition, driving element can also be triode etc.
According to an embodiment of the present utility model, described testing circuit also comprises: the second electric capacity, is connected between the sampled signal input end of described microprocessor and ground.
According to an embodiment of the present utility model, the first input end of described photo-coupler is connected to described first direct supply by the 8th sectional pressure element; And/or
The 9th sectional pressure element is in series with between first output terminal of described photo-coupler and described 7th sectional pressure element; And/or
The sampled signal input end of described microprocessor is connected between described 7th sectional pressure element and the first output terminal of described photo-coupler by the tenth sectional pressure element.
Preferably, 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 7th sectional pressure element, described 8th sectional pressure element, described 9th sectional pressure element or described tenth 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 6th sectional pressure element, be connected between the positive input terminal of described first comparer and the output terminal of described first comparer.
Wherein, described 6th sectional pressure element comprises: single resistive element, or the multiple resistive elements being connected in series and/or being connected in parallel.
According to the embodiment of the utility model second aspect, also proposed a kind of cooking apparatus, comprising: as 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.
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 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: the first sectional pressure element 11 and the second sectional pressure element 12 be connected in series, described first sectional pressure element 11 and described second sectional pressure element 12 are connected between the first direct supply (VCC namely shown in figure) and ground after connecting; First comparer 2, the negative input end of described first comparer 2 is by the first electric capacity 31 ground connection, and the positive input terminal of described first comparer 2 is connected between described first sectional pressure element 11 and described second sectional pressure element 12; 3rd sectional pressure element 13, the first end of described 3rd sectional pressure element 13 is connected to described first direct supply, and the second end of described 3rd sectional pressure element 13 is connected to the output terminal of described first comparer 2; The 4th sectional pressure element 14 and the first diode 41 be connected in series, described 4th sectional pressure element 14 and described first diode 41 are connected between the negative input end of described first comparer 2 and the second end of described 3rd sectional pressure element 13 after connecting, and described first diode 41 flows through described 4th sectional pressure element 14 for the electric current limiting described first direct supply; The 5th sectional pressure element 15 and the second diode 42 be connected in series, described 5th sectional pressure element 15 and described second diode 42 are connected between the negative input end of described first comparer 2 and the second end of described 3rd sectional pressure element 13 after connecting, and described second diode 42 flows through described 5th sectional pressure element 15 for the electric current limiting described first electric capacity 31; Probe circuit 5, comprises the first probe 51 and the second probe 52, and described first probe 51 and described second probe 52 are connected in parallel on the two ends of described 4th sectional pressure element 14; Signal deteching circuit 6, is connected to the output terminal of described first comparer 2, for detecting the output signal of described first comparer 2, to determine whether described probe circuit 5 detects water level.
Because the positive input terminal voltage of the first comparer 2 does not change substantially, and due to the existence of the first electric capacity 31, first diode 41 and the second diode 42, make when the positive input terminal voltage of the first comparer 2 is greater than the negative input end voltage of the first comparer 2, first comparer 2 exports high level, and the first direct supply charges to the first electric capacity 31, and after the first electric capacity 31 charging complete, the negative input end voltage of the first comparer 2 is higher than the positive input terminal voltage of the first comparer 2, and then first comparer 2 output low level, first electric capacity 31 discharges, if ignore the pressure drop of the first diode 41 and the second diode 42, namely ratio then between duration of charging of the first electric capacity 31 and discharge time be the ratio of the resistance of charge circuit and discharge loop, and the resistance of probe circuit 5 when water level being detected and water level do not detected has very large difference, therefore can be determined by the output signal detecting the first comparer 2 whether probe circuit 5 detects water level, particularly, can determine whether probe circuit 5 detects water level according to the first comparer 2 ratio exported between the duration of high level signal and the duration of low level signal.
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:
Wherein, the particular circuit configurations of signal deteching circuit can have following two embodiments:
Embodiment one:
According to an embodiment of the present utility model, as shown in Figure 1, described signal deteching circuit 6 comprises: photo-coupler 61, the first input end of described photo-coupler 61 is connected to described first direct supply, second input end of described photo-coupler 61 is connected to the output terminal of described first comparer 2, first output terminal of described photo-coupler 61 is connected to the second direct supply (VDD namely shown in figure) by the 7th sectional pressure element 17, the second output head grounding of described photo-coupler 61; Microprocessor 62, the sampled signal input end of described microprocessor 62 is connected between described 7th sectional pressure element 17 and the first output terminal of described photo-coupler 61, according to the input signal of described sampled signal input end, described microprocessor 62 determines whether described probe circuit 5 detects water level.
Embodiment two:
According to an embodiment of the present utility model, as shown in Figure 2, described signal deteching circuit 6 comprises: driving element 63, and the input end of described driving element 63 is connected to the output terminal of described first comparer 2; Photo-coupler 61, the first input end of described photo-coupler 61 is connected to described first direct supply, second input end of described photo-coupler 61 is connected to the output terminal of described driving element 63, first output terminal of described photo-coupler 61 is connected to the second direct supply by the 7th sectional pressure element 17, the second output head grounding of described photo-coupler 61; Microprocessor 62, the sampled signal input end of described microprocessor 62 is connected between described 7th sectional pressure element 17 and the first output terminal of described photo-coupler 61, according to the input signal of described sampled signal input end, described microprocessor 62 determines whether described probe circuit 5 detects water level.
According to an embodiment of the present utility model, described driving element 63 comprises: the second comparer, the negative input end of described second comparer is connected to the output terminal of described first comparer 2, and described second comparer positive input terminal is connected between described first sectional pressure element 11 and described second sectional pressure element 12.In addition, driving element 63 can also be triode etc.
According to an embodiment of the present utility model, described testing circuit 6 also comprises: the second electric capacity 64, between the sampled signal input end being connected to described microprocessor 62 and ground.
According to an embodiment of the present utility model, the first input end of described photo-coupler 61 is connected to described first direct supply by the 8th sectional pressure element 18; And/or
The 9th sectional pressure element 19 is in series with between first output terminal of described photo-coupler 61 and described 7th sectional pressure element 17; And/or
The sampled signal input end of described microprocessor 62 is connected between described 7th sectional pressure element 17 and the first output terminal of described photo-coupler 61 by the tenth sectional pressure element 110.
Preferably, described first sectional pressure element 11, described second sectional pressure element 12, described 3rd sectional pressure element 13, described 4th sectional pressure element 14, described 5th sectional pressure element 15, described 7th sectional pressure element 17, described 8th sectional pressure element 18, described 9th sectional pressure element 19 or described tenth sectional pressure element 110 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 6th sectional pressure element 16, be connected between the positive input terminal of described first comparer 2 and the output terminal of described first comparer 2.
Wherein, described 6th sectional pressure element 16 comprises: single resistive element, or the multiple resistive elements being connected in series and/or being connected in parallel.
The utility model also proposed a kind of cooking apparatus (not shown), comprising: the water level detection circuit for cooking apparatus as illustrated in fig. 1 or fig. 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, and also can detect whether probe circuit breaks down simultaneously.
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.
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 an embodiment of the present utility model;
Fig. 2 shows the structural representation of the water level detection circuit for cooking apparatus according to another embodiment of the present utility model.
Claims (10)
1. for a water level detection circuit for cooking apparatus, it is characterized in that, comprising:
The first sectional pressure element (11) be connected in series and the second sectional pressure element (12), be connected between the first direct supply and ground after described first sectional pressure element (11) and described second sectional pressure element (12) series connection;
First comparer (2), the negative input end of described first comparer (2) is by the first electric capacity (31) ground connection, and the positive input terminal of described first comparer (2) is connected between described first sectional pressure element (11) and described second sectional pressure element (12);
3rd sectional pressure element (13), the first end of described 3rd sectional pressure element (13) is connected to described first direct supply, and the second end of described 3rd sectional pressure element (13) is connected to the output terminal of described first comparer (2);
The 4th sectional pressure element (14) be connected in series and the first diode (41), be connected between the negative input end of described first comparer (2) and the second end of described 3rd sectional pressure element (13) after described 4th sectional pressure element (14) and described first diode (41) series connection, described first diode (41) flows through described 4th sectional pressure element (14) for the electric current limiting described first direct supply;
The 5th sectional pressure element (15) be connected in series and the second diode (42), be connected between the negative input end of described first comparer (2) and the second end of described 3rd sectional pressure element (13) after described 5th sectional pressure element (15) and described second diode (42) series connection, described second diode (42) flows through described 5th sectional pressure element (15) for the electric current limiting described first electric capacity (31);
Probe circuit (5), comprise the first probe (51) and the second probe (52), described first probe (51) and described second probe (52) are connected in parallel on the two ends of described 4th sectional pressure element (14);
Signal deteching circuit (6), is connected to the output terminal of described first comparer (2), for detecting the output signal of described first comparer (2), to determine whether described probe circuit (5) detects water level.
2. the water level detection circuit for cooking apparatus according to claim 1, is characterized in that, described signal deteching circuit (6) comprising:
Photo-coupler (61), the first input end of described photo-coupler (61) is connected to described first direct supply, second input end of described photo-coupler (61) is connected to the output terminal of described first comparer (2), first output terminal of described photo-coupler (61) is connected to the second direct supply, the second output head grounding of described photo-coupler (61) by the 7th sectional pressure element (17);
Microprocessor (62), the sampled signal input end of described microprocessor (62) is connected between described 7th sectional pressure element (17) and the first output terminal of described photo-coupler (61), according to the input signal of described sampled signal input end, described microprocessor (62) determines whether described probe circuit (5) detects water level.
3. the water level detection circuit for cooking apparatus according to claim 1, is characterized in that, described signal deteching circuit (6) comprising:
Driving element (63), the input end of described driving element (63) is connected to the output terminal of described first comparer (2);
Photo-coupler (61), the first input end of described photo-coupler (61) is connected to described first direct supply, second input end of described photo-coupler (61) is connected to the output terminal of described driving element (63), first output terminal of described photo-coupler (61) is connected to the second direct supply, the second output head grounding of described photo-coupler (61) by the 7th sectional pressure element (17);
Microprocessor (62), the sampled signal input end of described microprocessor (62) is connected between described 7th sectional pressure element (17) and the first output terminal of described photo-coupler (61), according to the input signal of described sampled signal input end, described microprocessor (62) determines whether described probe circuit (5) detects water level.
4. the water level detection circuit for cooking apparatus according to claim 3, is characterized in that, described driving element (63) comprising:
Second comparer, the negative input end of described second comparer is connected to the output terminal of described first comparer (2), and described second comparer positive input terminal is connected between described first sectional pressure element (11) and described second sectional pressure element (12).
5. the water level detection circuit for cooking apparatus according to any one of claim 2 to 4, is characterized in that, described testing circuit also comprises:
Second electric capacity (64), between the sampled signal input end being connected to described microprocessor (62) and ground.
6. the water level detection circuit for cooking apparatus according to any one of claim 2 to 4, is characterized in that,
The first input end of described photo-coupler (61) is connected to described first direct supply by the 8th sectional pressure element (18); And/or
The 9th sectional pressure element (19) is in series with between first output terminal of described photo-coupler (61) and described 7th sectional pressure element (17); And/or
The sampled signal input end of described microprocessor (62) is connected between described 7th sectional pressure element (17) and the first output terminal of described photo-coupler (61) by the tenth sectional pressure element (110).
7. the water level detection circuit for cooking apparatus according to claim 6, it is characterized in that, described first sectional pressure element (11), described second sectional pressure element (12), described 3rd sectional pressure element (13), described 4th sectional pressure element (14), described 5th sectional pressure element (15), described 7th sectional pressure element (17), described 8th sectional pressure element (18), described 9th sectional pressure element (19) or described tenth sectional pressure element (110) comprising:
Single resistive element, or the multiple resistive elements being connected in series and/or being connected in parallel.
8. the water level detection circuit for cooking apparatus according to any one of claim 1 to 4, is characterized in that, also comprise:
6th sectional pressure element (16), between the positive input terminal being connected to described first comparer (2) and the output terminal of described first comparer (2).
9. the water level detection circuit for cooking apparatus according to claim 8, is characterized in that, described 6th sectional pressure element (16) comprising:
Single resistive element, or the multiple resistive elements being connected in series and/or being connected in parallel.
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 |
|---|---|---|---|
| CN201520120443.4U CN204405142U (en) | 2015-02-28 | 2015-02-28 | For water level detection circuit and the cooking apparatus of cooking apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520120443.4U CN204405142U (en) | 2015-02-28 | 2015-02-28 | For water level detection circuit and the cooking apparatus of cooking apparatus |
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| CN204405142U true CN204405142U (en) | 2015-06-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112450752A (en) * | 2019-09-06 | 2021-03-09 | 广东美的生活电器制造有限公司 | Method and device for determining water level of wall breaking machine and storage medium |
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2015
- 2015-02-28 CN CN201520120443.4U patent/CN204405142U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112450752A (en) * | 2019-09-06 | 2021-03-09 | 广东美的生活电器制造有限公司 | Method and device for determining water level of wall breaking machine and storage medium |
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