CN203493403U - Pressure detecting circuit and electric pressure cooker - Google Patents
Pressure detecting circuit and electric pressure cooker Download PDFInfo
- Publication number
- CN203493403U CN203493403U CN201320599446.1U CN201320599446U CN203493403U CN 203493403 U CN203493403 U CN 203493403U CN 201320599446 U CN201320599446 U CN 201320599446U CN 203493403 U CN203493403 U CN 203493403U
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- Prior art keywords
- tongue tube
- pressure
- control chip
- cooking saucepan
- float
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Abstract
The utility model discloses a pressure detecting circuit and an electric pressure cooker. The pressure detecting circuit comprises a reed switch, a floater and a control chip, wherein the reed switch is used for outputting high level signals and low level signals, the floater is used for controlling the reed switch to be turned on or turned off, the first end of the reed switch is connected with the control chip, the second end of the reed switch is grounded, magnetic substances are arranged in the floater, and the floater and the reed switch are arranged in a spacing mode; when the pressure inside the electric pressure cooker is larger than the pressure outside the cooker, the pressure inside the cooker pushes the floater to be close to the reed switch, and the reed switch is turned on after sensing the magnetic field of the magnetic substances in the floater to output the lower level signals to the control chip; when the pressure inside the cooker is equal to the pressure outside the cooker, the floater is away from the reed switch, the reed switch can not sense the magnetic field of the magnetic substances in the floater, and then the reed switch is turned off and outputs the high level signals to the control chip; the control chip judges the relation between the pressure inside the cooker and the pressure outside the cooker according to the received high level signals and low level signals. The pressure detecting circuit is simple in structure, capable of detecting the pressure inside the cooker accurately in time, and high in reliability.
Description
Technical field
The utility model relates to electric pressure cooking saucepan technical field, relates in particular to a kind of pressure detection circuit and electric pressure cooking saucepan.
Background technology
At present, electric pressure cooking saucepan is as the upgraded product of conventional high-tension pot and electric cooker, be subject to more and more consumers' favor, electric pressure cooking saucepan combines the advantage of pressure cooker and electric cooker, there is the incomparable advantage of other cooking appliance, can meet many-sided culinary art needs, can be fast, safety, automatically realize multiple cooking method, it is energy-conservation, the characteristic of nutrition is the direction that modern pursues.
Meanwhile, the detection of electric pressure cooking saucepan internal pressure is an important indicator weighing electric pressure cooking saucepan performance, and existing electric pressure cooking saucepan internal pressure detection method is not prompt enough accurately, and structure is more complicated.
Utility model content
Main purpose of the present utility model is to provide a kind of simple in structure and pressure detection circuit promptly and accurately and electric pressure cooking saucepan.
In order to achieve the above object, the utility model proposes a kind of pressure detection circuit, comprise for exporting the tongue tube of low and high level signal, for controlling float and the control chip of described reed switch conduction or shutoff, the first end of described tongue tube is connected with described control chip, the second end ground connection of described tongue tube, in described float, be provided with magnetisable material, and arrange with described tongue tube interval, when the pot inner pressure of electric pressure cooking saucepan is greater than pot external pressure, pot inner pressure promotes described float and approaches described tongue tube, described tongue tube senses the magnetic field of magnetisable material in described float, described reed switch conduction, export a low level signal to described control chip, when the pot inner pressure of electric pressure cooking saucepan equals pot external pressure, described float is away from described tongue tube, and described tongue tube induction is less than the magnetic field of magnetisable material in described float, and described tongue tube turn-offs, and output one high level signal is to described control chip, described control chip is according to the pot inner pressure of low and high level signal judgement electric pressure cooking saucepan receiving and the magnitude relationship of pot external pressure.
Preferably, described magnetisable material is magnet or magnetite.
Preferably, described pressure detection circuit also comprises current-limiting resistance, and the first end of described tongue tube is connected with described control chip through described current-limiting resistance.
The utility model also proposes a kind of electric pressure cooking saucepan, comprise pressure detection circuit, described pressure detection circuit comprises for exporting the tongue tube of low and high level signal, for controlling float and the control chip of described reed switch conduction or shutoff, the first end of described tongue tube is connected with described control chip, the second end ground connection of described tongue tube, in described float, be provided with magnetisable material, and arrange with described tongue tube interval, when the pot inner pressure of electric pressure cooking saucepan is greater than pot external pressure, pot inner pressure promotes described float and approaches described tongue tube, described tongue tube senses the magnetic field of magnetisable material in described float, described reed switch conduction, export a low level signal to described control chip, when the pot inner pressure of electric pressure cooking saucepan equals pot external pressure, described float is away from described tongue tube, and described tongue tube induction is less than the magnetic field of magnetisable material in described float, and described tongue tube turn-offs, and output one high level signal is to described control chip, described control chip is according to the pot inner pressure of low and high level signal judgement electric pressure cooking saucepan receiving and the magnitude relationship of pot external pressure.
Preferably, described magnetisable material is magnet or magnetite.
Preferably, described pressure detection circuit also comprises current-limiting resistance, and the first end of described tongue tube is connected with described control chip through described current-limiting resistance.
Preferably, the electric pressure cooking saucepan that described electric pressure cooking saucepan is rigid structure.
A kind of pressure detection circuit and the electric pressure cooking saucepan that the utility model proposes, utilize the characteristic of magnet-sensitive switch tongue tube, when the pot inner pressure of electric pressure cooking saucepan is greater than pot external pressure, pot inner pressure promotes a float that is provided with magnetisable material and approaches described tongue tube, described tongue tube senses the magnetic field of magnetisable material in described float, described reed switch conduction, exports a low level signal to described control chip, when the pot inner pressure of electric pressure cooking saucepan equals pot external pressure, described float is without the thrust of pot inner pressure, away from described tongue tube, described tongue tube induction is less than the magnetic field of magnetisable material in described float, described tongue tube turn-offs, export a high level signal to described control chip, described control chip can be according to the pot inner pressure of low and high level signal judgement electric pressure cooking saucepan receiving and the magnitude relationship of pot external pressure, because the float that only utilizes tongue tube and be provided with magnetisable material carries out pressure detecting, structure is very simple, volume is little, and reaction is fast, can promptly and accurately detect pot inner pressure, reliability is high, long working life.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the utility model preferred embodiment pressure detection circuit.
In order to make the technical solution of the utility model clearer, clear, below in conjunction with accompanying drawing, be described in further detail.
The specific embodiment
Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
With reference to Fig. 1, Fig. 1 is the circuit diagram of the utility model preferred embodiment pressure detection circuit.
The utility model preferred embodiment proposes a kind of pressure detection circuit, comprises tongue tube 1 for exporting low and high level signal, for controlling float 2 and the control chip 3 of tongue tube 1 conducting or shutoff, wherein:
The first end of tongue tube 1 is connected with control chip 3, and the second end ground connection of tongue tube 1, is provided with magnetisable material in float 2, and this magnetisable material is magnet or magnetite etc., and float 2 arranges with tongue tube 1 interval.
Tongue tube is a kind of special key of magnetosensitive, and its two reeds are made by special material, are encapsulated in the glass tube of vacuum.When not yet operating, two reeds do not contact, and tongue tube is off state; When having magnet to approach it, tongue tube senses magnetic field, and additional magnetic field makes to produce different polarity near two reed endpoint locations, the reed of two opposed polarities of result will be attracted each other, when attraction is greater than the elastic force of reed, two reed closures, tongue tube becomes conducting state; When magnetic force is reduced to a certain degree, contact is opened by the elastic force of reed, and tongue tube is got back to off state.
In the present embodiment, float 2 arranges with tongue tube 1 interval, due to hypertelorism, tongue tube 1 cannot sense the magnetic field that the magnetisable material in float 2 produces, tongue tube 1 is in off state, in the use procedure of electric pressure cooking saucepan, when the pot inner pressure of electric pressure cooking saucepan is greater than pot external pressure and is also greater than ambient pressure environment, pot inner pressure produces thrust promotion float 2 and approaches tongue tube 1, when float 2 is close to tongue tube 1 certain distance, tongue tube 1 senses the magnetic field that the magnetisable material in float 2 produces, tongue tube 1 conducting, now, tongue tube 1 forms loop with control chip 3 and the earth, near exporting a low level signal on the A point of tongue tube 1 first end to control chip 3, when the pot inner pressure of electric pressure cooking saucepan is decreased to while equating with pot external pressure, pot inner pressure cannot produce thrust and promote float 2, float 2 is away from tongue tube 1, tongue tube 1 cannot sense the magnetic field that the magnetisable material in float 2 produces, tongue tube 1 turn-offs, now, tongue tube 1 cannot form loop with control chip 3 and the earth, near exporting a high level signal on the A point of tongue tube 1 first end to control chip 3,
Control chip 3 is according to the pot inner pressure of low and high level signal judgement electric pressure cooking saucepan of A point output and the magnitude relationship of pot external pressure, when control chip 3 receives the high level signal of A point output, judge that now the pot inner pressure of electric pressure cooking saucepan equates with pot external pressure; When control chip 3 receives the low level signal of A point output, judge that now the pot inner pressure of electric pressure cooking saucepan is greater than a pot external pressure; Thus, control chip 3 can be made corresponding operation according to the pot inner pressure size of the electric pressure cooking saucepan of judging, very timely, and accurately.
Further; above-mentioned pressure detection circuit also can comprise a current-limiting resistance R; the first end of tongue tube 1 is connected with control chip 3 through current-limiting resistance R; current-limiting resistance R mainly plays current limliting; when avoiding because of tongue tube 1 conducting, the loop that tongue tube 1 and control chip 3 form powers on and flows through greatly, and causes tongue tube 1 and the situation of control chip 3 because damaging compared with large electric current; strengthen stability and the reliability of circuit, can protect well tongue tube 1 and control chip 3.
The present embodiment is because the float that only utilizes tongue tube and be provided with magnetisable material carries out pressure detecting, and structure is very simple, and volume is little, and reaction is fast, can promptly and accurately detect pot inner pressure, and reliability is high, long working life.
The utility model also proposes a kind of electric pressure cooking saucepan, and this electric pressure cooking saucepan comprises above-mentioned pressure detection circuit, and its operation principle as mentioned above, does not repeat them here.Particularly, this electric pressure cooking saucepan is preferably the electric pressure cooking saucepan of rigid structure, its pot cover becomes rigidity combination with pot body, owing to having adopted above-mentioned pressure detection circuit, utilize the characteristic of magnet-sensitive switch tongue tube 1, when the pot inner pressure of electric pressure cooking saucepan is greater than pot external pressure, pot inner pressure promotes a float 2 that is provided with magnetisable material and approaches tongue tube 1, tongue tube 1 senses the magnetic field of magnetisable material in float 2, tongue tube 1 conducting, and output one low level signal is to control chip 3, when the pot inner pressure of electric pressure cooking saucepan equals pot external pressure, float 2 is without the thrust of pot inner pressure, away from tongue tube 1, tongue tube 1 induction is less than the magnetic field of magnetisable material in float 2, tongue tube 1 turn-offs, export a high level signal to control chip 3, control chip 3 can be according to the pot inner pressure of low and high level signal judgement electric pressure cooking saucepan receiving and the magnitude relationship of pot external pressure, thereby can be timely, according to the pot inner pressure situation of electric pressure cooking saucepan, make corresponding operation accurately, can the real-time user that makes know the duty of electric pressure cooking saucepan, and because the float 2 that only utilizes tongue tube 1 and be provided with magnetisable material carries out pressure detecting, structure is very simple, volume is little, reduced cost, reliability is high, long working life.
Above-mentioned pressure detection circuit and electric pressure cooking saucepan, utilize the characteristic of magnet-sensitive switch tongue tube, when the pot inner pressure of electric pressure cooking saucepan is greater than pot external pressure, pot inner pressure promotes a float that is provided with magnetisable material and approaches described tongue tube, described tongue tube senses the magnetic field of magnetisable material in described float, described reed switch conduction, exports a low level signal to described control chip, when the pot inner pressure of electric pressure cooking saucepan equals pot external pressure, described float is without the thrust of pot inner pressure, away from described tongue tube, described tongue tube induction is less than the magnetic field of magnetisable material in described float, described tongue tube turn-offs, export a high level signal to described control chip, described control chip can be according to the pot inner pressure of low and high level signal judgement electric pressure cooking saucepan receiving and the magnitude relationship of pot external pressure, because the float that only utilizes tongue tube and be provided with magnetisable material carries out pressure detecting, structure is very simple, volume is little, and reaction is fast, can promptly and accurately detect pot inner pressure, reliability is high, long working life.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or flow process conversion that utilizes the utility model description and accompanying drawing content to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present utility model.
Claims (7)
1. a pressure detection circuit, it is characterized in that, comprise for exporting the tongue tube of low and high level signal, for controlling float and the control chip of described reed switch conduction or shutoff, the first end of described tongue tube is connected with described control chip, the second end ground connection of described tongue tube, in described float, be provided with magnetisable material, and arrange with described tongue tube interval, when the pot inner pressure of electric pressure cooking saucepan is greater than pot external pressure, pot inner pressure promotes described float and approaches described tongue tube, described tongue tube senses the magnetic field of magnetisable material in described float, described reed switch conduction, export a low level signal to described control chip, when the pot inner pressure of electric pressure cooking saucepan equals pot external pressure, described float is away from described tongue tube, and described tongue tube induction is less than the magnetic field of magnetisable material in described float, and described tongue tube turn-offs, and output one high level signal is to described control chip, described control chip is according to the pot inner pressure of low and high level signal judgement electric pressure cooking saucepan receiving and the magnitude relationship of pot external pressure.
2. pressure detection circuit according to claim 1, is characterized in that, described magnetisable material is magnet or magnetite.
3. pressure detection circuit according to claim 2, is characterized in that, also comprises current-limiting resistance, and the first end of described tongue tube is connected with described control chip through described current-limiting resistance.
4. an electric pressure cooking saucepan, it is characterized in that, comprise pressure detection circuit, described pressure detection circuit comprises for exporting the tongue tube of low and high level signal, for controlling float and the control chip of described reed switch conduction or shutoff, the first end of described tongue tube is connected with described control chip, the second end ground connection of described tongue tube, in described float, be provided with magnetisable material, and arrange with described tongue tube interval, when the pot inner pressure of electric pressure cooking saucepan is greater than pot external pressure, pot inner pressure promotes described float and approaches described tongue tube, described tongue tube senses the magnetic field of magnetisable material in described float, described reed switch conduction, export a low level signal to described control chip, when the pot inner pressure of electric pressure cooking saucepan equals pot external pressure, described float is away from described tongue tube, and described tongue tube induction is less than the magnetic field of magnetisable material in described float, and described tongue tube turn-offs, and output one high level signal is to described control chip, described control chip is according to the pot inner pressure of low and high level signal judgement electric pressure cooking saucepan receiving and the magnitude relationship of pot external pressure.
5. electric pressure cooking saucepan according to claim 4, is characterized in that, described magnetisable material is magnet or magnetite.
6. electric pressure cooking saucepan according to claim 5, is characterized in that, described pressure detection circuit also comprises current-limiting resistance, and the first end of described tongue tube is connected with described control chip through described current-limiting resistance.
7. electric pressure cooking saucepan according to claim 4, is characterized in that, the electric pressure cooking saucepan that described electric pressure cooking saucepan is rigid structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320599446.1U CN203493403U (en) | 2013-09-26 | 2013-09-26 | Pressure detecting circuit and electric pressure cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320599446.1U CN203493403U (en) | 2013-09-26 | 2013-09-26 | Pressure detecting circuit and electric pressure cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203493403U true CN203493403U (en) | 2014-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320599446.1U Expired - Lifetime CN203493403U (en) | 2013-09-26 | 2013-09-26 | Pressure detecting circuit and electric pressure cooker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203493403U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016077987A1 (en) * | 2014-11-18 | 2016-05-26 | 魏晓敏 | Electric pressure cooker and pressure detection circuit thereof |
| WO2016077988A1 (en) * | 2014-11-18 | 2016-05-26 | 魏晓敏 | Electric pressure cooker and pressure detection circuit thereof |
-
2013
- 2013-09-26 CN CN201320599446.1U patent/CN203493403U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016077987A1 (en) * | 2014-11-18 | 2016-05-26 | 魏晓敏 | Electric pressure cooker and pressure detection circuit thereof |
| WO2016077988A1 (en) * | 2014-11-18 | 2016-05-26 | 魏晓敏 | Electric pressure cooker and pressure detection circuit thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140326 |
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| CX01 | Expiry of patent term |