CN202758606U - Alarm for giving alarm during fluid boiling and device with such alarm - Google Patents
Alarm for giving alarm during fluid boiling and device with such alarm Download PDFInfo
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- CN202758606U CN202758606U CN 201220157101 CN201220157101U CN202758606U CN 202758606 U CN202758606 U CN 202758606U CN 201220157101 CN201220157101 CN 201220157101 CN 201220157101 U CN201220157101 U CN 201220157101U CN 202758606 U CN202758606 U CN 202758606U
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- vibrating plate
- piezoelectric vibrating
- alarm
- resonant cavity
- piezoelectric
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Abstract
An alarm for giving an alarm during fluid boiling and a device with such an alarm are provided. The alarm comprises a housing, a direct-current power source and a driving and oscillating circuit. The alarm also comprises a piezoelectric vibrating plate and a resonant cavity, wherein the piezoelectric vibrating plate is mounted in the resonant cavity. The direct-current power source supplies power to the driving and oscillating circuit, which drives the piezoelectric vibrating plate. When vibration occurs, the piezoelectric vibrating plate generates sounds. The direct-current power source, the driving and oscillating circuit, a switch and the resonant cavity are arranged in the housing. The alarm of the utility model is applied in a kettle or a pan. When fluid is boiling, the alarm unit of a vibration transducer sends out an alarm signal, so that beautiful sounds are generated to inform users that the water is boiling and needs to be treated as soon as possible, thereby not only reducing the waste of fuels and water, but also guaranteeing the safety in use.
Description
Technical field:
The utility model belongs to the family life field, be specifically related to a kind of when liquid boiling alarm and the device with this alarm.
Background technology:
In the prior art, there are a lot of equipment to be used for test water and whether seethe with excitement.A kind of method commonly used is to collect steam by a whistle, and this is warning device in the kettle commonly used.United States Patent (USP) No. 957633 (1910) discloses a kind of technical scheme at pot or a whistle of pot cover installation, and there are the following problems for this technical scheme: 1. when not needing to use lid, can't report to the police; 2. this method will need blowing a whistle of pot that an independent lid and each vary in size.The method of another one is at kettle hygrosensor alarm type device to be installed, with the technical scheme of probe placement in liquid. there are the following problems for this technical scheme: 1. probe placement is worthless in liquid, the kettle of may making dirty causes cleaning kettle and equipment is cleaned needs clean.2. large, the vapor (steam) temperature fluctuation of temperature variation during owing to boiling, the steam-type temperature sensor is also inaccurate.People often find, the come to life temperature of rear steam of liquid reduces.
Piezoelectric ceramic piece is a kind of electrophonic musical element, in the middle of two copper circular electrodes, put into the piezoelectric ceramics dielectric material, when connecting the AC audio signal on two plate electrodes, piezoelectric patches can produce corresponding sound according to the big or small Frequency generated vibrations of signal.Piezoelectric ceramic piece is because simple in structure cheap, is widely used in the electronic apparatus aspect such as toy, pronunciation electronic watch, electronic device, electronic watch, the aspects such as timer.
The utility model content:
The utility model proposes the warning device of the type vibration transducer of handling knob when a kind of water in pot and kettle seethes with excitement.And the warning device of the type vibration transducer of handling knob is provided, and can accurately judge the water boiling, and can be installed on any pot and the kettle, do not need to be inserted in the liquid.Specific as follows:
A kind of alarm when liquid boiling comprises casing, direct supply, driving and oscillatory circuit, also comprises piezoelectric vibrating plate and resonant cavity, and piezoelectric vibrating plate is installed in the resonant cavity; Direct supply is given and is driven and the oscillatory circuit power supply, drives and oscillatory circuit driving piezoelectric vibrating plate, and when vibration-generating, piezoelectric vibrating plate produces sound; Described alarm also comprises a switch, the startup that is used for control device with close, described direct supply, driving and oscillatory circuit, switch, resonant cavity are installed in the casing.
Preferably, described piezoelectric vibrating plate is that piezoelectric ceramic piece sticks in vibration and forms on the sheet metal.
Preferably, described piezoelectric vibrating plate is auto-excitation type or separated exciting piezoelectric vibrating plate.
Preferably, piezoelectric vibrating plate is fixed in the resonant cavity by four kinds of modes: the node support, and edge support, central authorities support or the edge is fixed.
Preferably, piezoelectric vibration is board-like to have three kinds of mounting meanss with housing, produces respectively three directions of three kinds of relative direction of vibration: X, Y or Z.
Preferably, described three kinds of mounting meanss are used singly or in combination.
A kind of device with described alarm, this device is pot, kettle, door or window etc.
The beneficial effects of the utility model are:
The utility model is used for kettle or pot, and when boiling, the warning device of vibration transducer sends alerting signal, thereby produce the melodious melodious sound sound, boil in order to inform user's water, need to process as quickly as possible, so not only can reduce the waste of fuel and water, also guarantee use safety.
Description of drawings:
Fig. 1 is the handle knob three-dimensional sketch of warning device of type vibration transducer of the utility model.
Fig. 2 be the utility model handle knob the type vibration transducer warning device with the plane sketch.
Fig. 3 is the handle knob three-dimensional sketch of three types of warning device XZY direction vibration of type vibration transducer of the utility model.
Fig. 4 is the handle knob three-dimensional sketch of the first type of warning device of type vibration transducer of the utility model.
Fig. 5 (a) is that handle knob the first type edge (periphery) of warning device of type vibration transducer of the utility model support to be installed diagrammatic sectional view.
Fig. 5 (b) is handle knob the first type edge (periphery) fixed installation diagrammatic sectional view of warning device of type vibration transducer of the utility model.
Fig. 5 (c) is that diagrammatic sectional view is installed in handle knob the first type node support of warning device of type vibration transducer of utility model.
Fig. 6 is the handle knob three-dimensional sketch of the second type of warning device of type vibration transducer of the utility model.
Fig. 7 (a) is that handle knob the second type edge (periphery) of warning device of type vibration transducer of the utility model support to be installed diagrammatic sectional view.
Fig. 7 (b) is handle knob the second type edge (periphery) fixed installation diagrammatic sectional view of warning device of type vibration transducer of the utility model.
Fig. 7 (c) is that diagrammatic sectional view is installed in handle knob the second type node support of warning device of type vibration transducer of the utility model.
Fig. 8 is handle knob three-dimensional sketch of the third type of warning device of type vibration transducer of the utility model.
Fig. 9 (a) is that handle knob the third type edge (periphery) of warning device of type vibration transducer of the utility model support to be installed diagrammatic sectional view.
Fig. 9 (b) is handle knob the third type edge (periphery) fixed installation diagrammatic sectional view of warning device of type vibration transducer of the utility model.
Fig. 9 (c) is that diagrammatic sectional view is installed in handle knob the third type node support of warning device of type vibration transducer of the utility model.
Figure 10 is the vibration system plane sketch of warning device, and wherein, Figure 10 a is open configuration figure, and Figure 10 b is contraction state figure, and Figure 10 c applies voltage status figure.
Figure 11 supports piezoelectric vibrating plate fixed form plane sketch in the support vibration system of warning device, wherein, Figure 11 a is the fixed form plane sketch that node is supported, Figure 11 b is the fixed form plane sketch of edge support, Figure 11 c is the fixed form plane sketch that central authorities support, Figure 11 d is the fixing fixed form plane sketch in edge (periphery).
Figure 12 is independent-excited piezoelectric vibrating plate structural plan sketch in the support vibration system of warning device, and wherein, Figure 12 a is vertical view, and Figure 12 b is front elevation.
Figure 13 is auto-excitation type piezoelectric vibrating plate structural plan sketch in the support vibration system of warning device, and wherein, Figure 13 a is vertical view, and Figure 13 b is front elevation.
Figure 14 is three kinds of supports (fixing) mode mesomerism chamber sectional view that the piezoelectric vibrating plate of warning device is assembled in resonant cavity, wherein, Figure 14 a is the cut-open view of embodiment one, and Figure 14 b is the cut-open view of embodiment two, and Figure 14 c is the cut-open view of embodiment three.
Figure 15 is two kinds of driving method structural plans of support (fixing) mode sketch that the piezoelectric vibrating plate of warning device is assembled in cavity, and wherein, Figure 15 a is the structural plan sketch of external drive method, and Figure 15 b is the structural plan sketch of self-driven method.
Figure 16 is the three-dimensional sketch that warning device is applied in pan.
Figure 17 is the three-dimensional sketch that warning device is applied in frying pan.
Figure 18 warning device and rubber case are incorporated into together three-dimensional sketch.
Figure 19 has had the alarm device of handling knob to be used in the three-dimensional sketch of kettle on kettle and pot cover.
Figure 20 is the front elevation of Figure 19.
Figure 21 has had the alarm device of handling knob to be used in the three-dimensional sketch of pan on kettle and pot cover.
Figure 22 is the front elevation of Figure 21.
Figure 23 has had the alarm device of handling knob to be used in the three-dimensional sketch of frying pan on kettle and pot cover.
Figure 24 is the front elevation of Figure 23.
Shown in Figure 25 is the oscillatory circuit of piezoelectric vibrating plate.
Embodiment:
Below in conjunction with accompanying drawing the utility model is described in detail.
Accompanying drawing 1 kettle 1 is by water kettle body 2 and pot lid 3 and handle knob and 4 form.
In accompanying drawing 2 kettles by water kettle body 2 and pot lid 3 and handle knob 4 and water 5 and screw 9 form.Wherein pot lid 3 and handling knob 4 connects together by screw 9, and when the water in the kettle seethe with excitement, water was subjected to thermal evaporation, promotes pot lid and lifts up and down being subject to vapor pressure, ceaselessly jumps, and produces and vibrates.Heat energy is converted into mechanical energy, thereby produces the melodious melodious sound sound by the warning device of 4 vibration transducers of handling knob.
Accompanying drawing 3 is that the water in pot and kettle of the present utility model is handled knob when seething with excitement and 4 is comprised of the warning device 6 of the type vibration transducer of handling knob and 7 and 8 three types respectively.What three types was best is independent use, also can form use by two or three unit, thereby forms at directions X Y-direction, the warning device of Z direction vibration transducer.
Embodiment 1:
Accompanying drawing 4 is that the warning device 6 of the type vibration transducer of handling knob of the present utility model comprises front housing 10, back cabinet 11, battery dc 13, direct current pressure vessel 18, direct supply positive and negative electrode sheet metal 14, drive and oscillatory circuit 16, switch 12, auto-excitation type piezoelectric vibrating plate 15 or independent-excited piezoelectric vibrating plate 17 screws 9 and screw 21 etc.
Accompanying drawing 5 is warning device 6 sectional views of the type vibration transducer of handling knob of the present utility model, comprise part and circuit that accompanying drawing 4 is all, wherein auto-excitation type piezoelectric vibrating plate 15 or independent-excited piezoelectric vibrating plate 17 fixed form that is assembled in resonant cavity can be divided into: edge (periphery) supports (Fig. 5 (a)), edge (periphery) fixing (Fig. 5 (b)), node support (Fig. 5 (c)), 51 is resonant cavity, is a cavity; 52 is vocal hole; 53 is stilt such as bonding agent.Piezoelectric ceramic piece has utilized the inverse piezoelectric effect principle to come work exactly, is electric energy conversion mechanical energy, to produce praetersonic, sounds.
Be depicted as edge (periphery) support pattern such as Fig. 5 (a): piezoelectric vibrating plate external diameter edge is fixed in the resonant cavity, generally adopt without feedbacking the formula piezoelectric vibrating plate, and its piezoelectric vibrating plate must be arranged in pairs or groups with the resonant cavity frequency, just have higher sound press output, and by outside oscillatory circuit generation driving signal, piezoelectric vibrating plate is sounded.
Be depicted as edge (periphery) fixed form such as Fig. 5 (b): resonant cavity wall thickness 19 and vocal hole, support set 20 are pasted together.
Be depicted as the node support pattern such as Fig. 5 (c): in the loop configuration that piezoelectric vibrating plate is fixed in approximately and the piezoelectric ceramic piece diameter is unidimensional.If the resonant cavity design is proper, and correct back coupling formula piezoelectric vibrating plate and the positive feedback circuit of collocation frequency, larger sound press and correct frequency can be generated.
Embodiment 2:
Accompanying drawing 6 is that the warning device 7 of the type vibration transducer of handling knob of the present utility model comprises upper casing 22, end casing 23, battery dc 13, direct current pressure vessel 26, direct supply positive and negative electrode sheet metal 14, driving circuit and oscillatory circuit 16, switch 12, auto-excitation type piezoelectric vibrating plate 15 or independent-excited piezoelectric vibrating plate 17 support fore shell 24, support back cover 25 and screw 21 etc.
Accompanying drawing 7 is warning device 7 sectional views of the type vibration transducer of handling knob of the present utility model, comprise part and circuit that accompanying drawing 6 is all, wherein auto-excitation type piezoelectric vibrating plate 15 or independent-excited piezoelectric vibrating plate 17 fixed form that is assembled in resonant cavity can be divided into: edge (periphery) supports (Fig. 7 (a)), edge (periphery) fixing (Fig. 7 (b)), node support (Fig. 7 (c)).51 is resonant cavity, is a cavity; 52 is vocal hole; 53 is stilt such as bonding agent.Resonant cavity wall thickness 28 and vocal hole, appearance vocal hole 29, support set 27 is pasted together.Piezoelectric ceramic piece has utilized the inverse piezoelectric effect principle to come work exactly, is electric energy conversion mechanical energy, to produce praetersonic, sounds.
Fig. 7 (a) is depicted as edge (periphery) support pattern: piezoelectric vibrating plate external diameter edge is fixed in the resonant cavity, generally adopt without feedbacking the formula piezoelectric vibrating plate, and its piezoelectric vibrating plate must be arranged in pairs or groups with the resonant cavity frequency, just have higher sound press output, and by outside oscillatory circuit generation driving signal, piezoelectric vibrating plate is sounded.
Fig. 7 (b) is depicted as edge (periphery) fixed form: resonant cavity wall thickness 28 and vocal hole, support set 27 are pasted together.
Fig. 7 (c) is depicted as the node support pattern: in the loop configuration that piezoelectric vibrating plate is fixed in approximately and the potsherd diameter is unidimensional.If the resonant cavity design is proper, and correct back coupling formula piezoelectric vibrating plate and the positive feedback circuit of collocation frequency, larger sound press and correct frequency can be generated.
Embodiment 3:
Accompanying drawing 8 is that the warning device 8 of the type vibration transducer of handling knob of the present utility model comprises upper casing 30, intermediate casing 31, end casing 32, battery dc 13, direct current pressure vessel 26, direct supply positive and negative electrode sheet metal 14, driving circuit and oscillatory circuit 16, switch 12, auto-excitation type piezoelectric vibrating plate 15 or independent-excited piezoelectric vibrating plate 17, appearance vocal hole 33 and screw 29 and screw 34 and screw 21 etc.
Accompanying drawing 9 is warning device 8 sectional views of the type vibration transducer of handling knob of the present utility model, comprise part and circuit that accompanying drawing 8 is all, wherein auto-excitation type piezoelectric vibrating plate 15 or independent-excited piezoelectric vibrating plate 17 fixed form that is assembled in resonant cavity can be divided into: edge (periphery) supports (Fig. 9 (a)), edge (periphery) fixing (Fig. 9 (b)), node support (Fig. 9 (c)), 51 is resonant cavity, is a cavity; 53 is stilt such as bonding agent.Piezoelectric ceramic piece has utilized the inverse piezoelectric effect principle to come work exactly, is electric energy conversion mechanical energy, to produce praetersonic, sounds.
Fig. 9 (a) is depicted as edge (periphery) support pattern: piezoelectric vibrating plate external diameter edge is fixed in the resonant cavity, generally adopt without feedbacking the formula piezoelectric vibrating plate, and its piezoelectric vibrating plate must be arranged in pairs or groups with the resonant cavity frequency, just have higher sound press output, and by outside oscillatory circuit generation driving signal, piezoelectric vibrating plate is sounded.
Fig. 9 (b) is depicted as edge (periphery) fixed form: resonant cavity wall thickness 35 and vocal hole 33, support set 33 is pasted together.
Fig. 9 (c) is depicted as: the node support pattern: in the loop configuration that piezoelectric vibrating plate is fixed in approximately and the potsherd diameter is unidimensional.If the resonant cavity design is proper, and correct back coupling formula piezoelectric vibrating plate and the positive feedback circuit of collocation frequency, larger sound press and correct frequency can be generated.
Accompanying drawing 10 is the vibration system plane sketches of warning device of type vibration transducer of handling knob when the water in pot and the kettle seethes with excitement: (a) open configuration, (b) contraction state, (c) apply voltage.
Accompanying drawing 11 is to support piezoelectric vibrating plate fixed form plane sketch in water when boiling in pot and the kettle handled knob the support vibration system of warning device of type vibration transducer: (a) node support, (b) edge support, (c) central authorities support, (d) edge (periphery) is fixed.
Accompanying drawing 12 is the first types in the support vibration system of warning device of type vibration transducer of handling knob when the water in pot and the kettle seethes with excitement: the structural plan sketch of independent-excited piezoelectric vibrating plate 17: comprise voltage ceramic 121, electrode 122, sheet metal 123.As shown in the figure, in two sides that comprise voltage ceramic sheet 121 electrode 122 is arranged all, for without feedbacking formula electric oscillation plate, adopt outer sharp formula/external drive method to drive.Shown in Figure 15 (a), two electrodes 122 are connected with external drive circuit by wire.Voltage ceramic 121 is used to drive piezoelectric vibrating plate from the electric signal such as outside oscillating circuits such as multifrequency oscillators, produces sound.Adopt this method, the effect of piezoelectric acoustic oscillating plate is just such as same loudspeaker.By the mechanical oscillation Qm of suitable inhibition piezoelectric vibrating plate, obtain wider acoustic pressure frequency band.Accompanying drawing 13 is the second types in the support vibration system of warning device of type vibration transducer of handling knob when the water in pot and the kettle seethes with excitement: auto-excitation type piezoelectric vibrating plate structural plan sketch: comprise voltage ceramic sheet 131, input electrode 132, feedback electrode 133, sheet metal 134; Feedback electrode 133 is that the auto-excitation type piezoelectric vibrating plate that voltage ceramic 131 self has is 3 utmost point formula piezoelectric elements, and shown in Figure 15 (b), its input electrode 132, feedback electrode 133, sheet metal 134 are connected to driving circuit.When frequency during near oscillation frequency, circuit satisfies the concussion condition, and piezoelectric vibrating plate is driven by oscillation frequency.Shown in Figure 25 is simple oscillatory circuit, and it is comprised of a transistor and three resistors.Generally speaking, Figure 11 and node shown in Figure 14 support and are widely used in self-driven method.The suitable resonance that node supports piezoelectric vibrating plate can provide the stable concussion with high mechanical vibration Qm value, can also provide a high pressure monotone simultaneously.
Accompanying drawing 14 (a), (b), (c) are the cut-open view of the resonant cavity of above-mentioned three embodiment.Generally, it is indoor that piezoelectric vibrating plate is installed in resonator, to produce high sound pressure.Utilize resonant frequency equation (helmholtz formula), can calculate the resonance frequency (fcav) of sympathetic response chamber among Figure 14.Because piezoelectric vibrating plate and sympathetic response chamber have suitable resonance frequency, be respectively (f0) and (fcav), therefore, can increase by the position of controlling both acoustic pressure and the specific bandwidth of acquisition under the characteristic frequency.
Accompanying drawing 15 is that the driving method of piezoelectric sound component is divided into (a) external drive method and (b) self-driven method.
The fundamental oscillation condition of the circuit during self-driven method is as described below:
A. Figure 13 and Figure 14 Figure 25 and shown in v
oWith v
fBetween phase differential be necessary for 180 °.
B. must satisfy following condition:
In the formula,
Hie: transistor input impedance
Hfe: current amplification degree
C. set R
1, so that VCE transistor DC bias point is supply voltage half.
D. regulate R
2, in order to make spurious oscillation not act on Sasser.
Use step
1) when the piezoelectric acoustic oscillating plate is set as interruption tone, even at it " X " some on/off driving circuit shown in Figure 25, sound sounds it also can being continuous.This is because fail to disconnect feedback voltage.
2) design piezoelectric microphone circuit.Determine transistor hfe and network constant, to guarantee the stable concussion of bullhorn.
3) design can guarantee the switchgear that power supply directly switches.
4) self-driven circuit has been built in the piezoelectric acoustic oscillating plate.Thereby, do not need to be designed in addition the circuit that drives the piezoelectric acoustic oscillating plate.
5) keep rated voltage (3.0 to 20Vdc).In addition, also can provide the product of operating voltage greater than 20Vdc.
6) resistor must not be connected in series with power supply, because may cause unusual vibration.If must utilize resistor to regulate acoustic pressure, then should with the piezoelectric acoustic oscillating plate capacitor (approximately 1uF) that is connected in parallel.
7) the sound wave cave on must not closure casing.
8) warning device of pressing vibration transducer is installed. apart from the radiation of the sound wave on the housing front side 15mm scope any barrier being arranged.
How to improve sound pressure level (S.P.L.)
When input voltage is larger, must make piezoelectric sound component produce higher S.P.L., its reason is that piezoelectric sound component is to be driven by voltage.S.P.L. and the relation between the input voltage shown in following formula:
S.P.L. (dB) behind the increase input voltage=former S.P.L.+20Log (V2/V1)
V1: former input voltage
V2: the input voltage of increase
So theoretically, when input voltage increased twice, S.P.L. can improve 6dB.
Improve sound pressure level element S.P.L.. according to the resonance frequency (f in the resonant cavity
Cav) formula. design the method for resonant cavity and circuit.
Accompanying drawing 16 and accompanying drawing 17 are that the warning device 6 and 7 and 8 of hand-type vibration transducer is applied in various types of pot and comprises that pot body 37 and pot cover 38 form etc. for 36 and 39. pot 36.Pot 39 comprises pot body 40 and pot cover 41 compositions etc.
The handle knob warning device of type vibration transducer and rubber case of accompanying drawing 18 is incorporated into together in addition warning device 42, is comprised of the warning device 4 of rubber case 43 and the type vibration transducer of handling knob etc.
Accompanying drawing 19 and accompanying drawing 20 and accompanying drawing 21 and accompanying drawing 22 and accompanying drawing 23 and accompanying drawing 24 are applied on various types of pot and the kettle for the warning device 42 of the type vibration transducer of handling knob.
The piezoelectric vibrating plate of the feedback electrode shown in the accompanying drawing 25 is installed in the oscillatory circuit closed-loop path.When frequency during near oscillation frequency, circuit satisfies oscillating condition, and piezoelectric vibrating plate is driven by oscillation frequency.
Claims (8)
1. an alarm of reporting to the police when liquid boiling comprises casing, direct supply, driving and oscillatory circuit, it is characterized in that: also comprise piezoelectric vibrating plate and resonant cavity, piezoelectric vibrating plate is installed in the resonant cavity; Direct supply is given and is driven and the oscillatory circuit power supply, drives and oscillatory circuit driving piezoelectric vibrating plate, and when vibration-generating, piezoelectric vibrating plate produces sound; Described alarm also comprises a switch, the startup that is used for control device with close, described direct supply, driving and oscillatory circuit, switch, resonant cavity are installed in the casing.
2. alarm according to claim 1 is characterized in that: described piezoelectric vibrating plate is that piezoelectric ceramic piece sticks on the vibration sheet metal and forms.
3. alarm according to claim 1, it is characterized in that: described piezoelectric vibrating plate is auto-excitation type or separated exciting piezoelectric vibrating plate.
4. alarm according to claim 1, it is characterized in that: piezoelectric vibrating plate is fixed in the resonant cavity by four kinds of modes: the node support, edge support, central authorities support or the edge is fixed.
5. alarm according to claim 1, it is characterized in that: piezoelectric vibrating plate and housing have three kinds of mounting meanss, produce respectively three directions of three kinds of relative direction of vibration: X, Y or Z.
6. alarm according to claim 5, it is characterized in that: described three kinds of mounting meanss are used singly or in combination.
7. the device that has each described alarm of claim 1 to 6.
8. device according to claim 7 is characterized in that: this device is pot, kettle, door or window.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220157101 CN202758606U (en) | 2012-04-13 | 2012-04-13 | Alarm for giving alarm during fluid boiling and device with such alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220157101 CN202758606U (en) | 2012-04-13 | 2012-04-13 | Alarm for giving alarm during fluid boiling and device with such alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202758606U true CN202758606U (en) | 2013-02-27 |
Family
ID=47737775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220157101 Expired - Fee Related CN202758606U (en) | 2012-04-13 | 2012-04-13 | Alarm for giving alarm during fluid boiling and device with such alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202758606U (en) |
-
2012
- 2012-04-13 CN CN 201220157101 patent/CN202758606U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130227 Termination date: 20160413 |