CN2878975Y - Electromagnetic oven - Google Patents
Electromagnetic oven Download PDFInfo
- Publication number
- CN2878975Y CN2878975Y CN 200520064155 CN200520064155U CN2878975Y CN 2878975 Y CN2878975 Y CN 2878975Y CN 200520064155 CN200520064155 CN 200520064155 CN 200520064155 U CN200520064155 U CN 200520064155U CN 2878975 Y CN2878975 Y CN 2878975Y
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- electromagnetic oven
- water
- temperature
- electromagnetic furnace
- electromagnetic
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Abstract
The utility model relates to an electromagnetic furnace, in particular to an electromagnetic furnace utilizing vibration sensing to measure change of water temperature and water oiling. The electromagnetic furnace is provided with a vibration sensor that is attached to the electromagnetic furnace casing and is connected to the electromagnetic furnace control panel through lead wire. An electromagnetic furnace of the utility model can rapidly and reliably judge whether the water is boiling. Moreover, such mode is free from influence of surrounding temperature and is characterized by accurate measurement and rapid reaction.
Description
[technical field]
The utility model relates to a kind of electromagnetic oven, especially a kind of electromagnetic oven that utilizes vibrating sensing to measure the boiling of water temperature variation and water.
[background technology]
The main temperature measuring equipment of electromagnetic oven is to utilize thermistor to be attached to the ceramic wafer below at present, detects its temperature, thereby infers the temperature of pot body, and then infer water temperature, learns whether water seethes with excitement, and this method has many defectives, often indeterminacy.Main cause is: one, the ceramic wafer pyroconductivity is very low, exists thermograde with the bottom of a pan, makes temperature survey occur lagging behind more for a long time.Two, IGBT and radiator thereof below the ceramic wafer also are a pyrotoxin, and be influential to the temperature of thermistor, this influence and mould, and the wiring board design is relevant.Need the fan heat radiation when three, IGBT works, thereby the convection current that produces cold and hot air, thermometric influenced.Four, temperature and circulation of air are influential to the heat radiation of electromagnetic oven whole system, and temperature is high more, and circulation of air is bad more, difficult more the leaving of heat of ceramic wafer and IGBT radiator savings.
To heat up water is example, and after electromagnetic oven was heated up water or fried in shallow oil stir-fry end and shutdown, the temperature of ceramic wafer was still very high, if heat up water once more in the short time, though water temperature is not high, because the ceramic wafer temperature that records is very high, cause erroneous judgement disconnected easily, cause the not boiled just shutdown in advance of water.
It is with hole of ceramic twist drill that a kind of improvement structure is arranged, or other similar mode, so that thermistor directly contacts with the pot body, reaches the purpose of accurate measurement temperature of boiler, makes metal pan body and wiring board produce electric the contact easily but do one like this; Two make water leak in the electromagnetic oven housing easily; And influence mechanical strength, increase the mould complexity and influence attractive in appearance.Another kind of improvement structure is to utilize the far infrared thermometry to measure temperature of boiler, and the electromagnetic oven mould of design specialized makes the far infrared temperature transducer directly facing to a pot body, but the cost costliness.In addition, because the boiling point difference of different altitude height water, these two kinds of methods in fact still can not in time be measured the boiling of water outlet.And the boiling of water is as can not promptly and accurately measuring, and except may not having boiled just shutdown ahead of time, also may produce problem such as boil, overflow.
Therefore, measure how in time, exactly temperature of boiler particularly the boiling of water be the important technological problems that perplexs the electromagnetic oven industry at present.
[summary of the invention]
The purpose of this utility model be to provide a kind of measurement accurately, react electromagnetic oven fast.
In order to reach above-mentioned creation purpose, a kind of electromagnetic oven of the utility model is provided with a vibrating sensor, and this vibrating sensor is attached to the electromagnetic oven housing, and is connected to the electromagnetic oven control panel by lead-in wire.
This electromagnetic oven control panel is provided with amplifying circuit and single-chip microcomputer, and described piezoelectricity switching signal is amplified by amplifying circuit, carries out analysis and judgement by single-chip microcomputer again.
This electromagnetic oven also comprises thermistor or far infrared temperature measuring equipment.
This vibrating sensor is a piezoceramic transducer.
Compared with prior art, the utility model electromagnetic oven utilizes vibrating sensor to measure the boiling of water temperature variation and water, thereby can rapid and reliablely judge whether water seethes with excitement, and this method is not subjected to the influence of ambient temperature.
[description of drawings]
Fig. 1 is the schematic diagram of the utility model electromagnetic oven structure;
Fig. 2 is the schematic diagram that Fig. 1 the utility model electromagnetic oven temperature measuring equipment constitutes.
[specific embodiment]
Below in conjunction with the drawings and specific embodiments the utility model electromagnetic oven is described further.
As shown in Figure 1, under the panel of electromagnetic oven body 1, near the position of ceramic panel 2, adhere to a vibrating sensor 3 (as piezoelectric ceramics), this vibrating sensor 34 is connected to electromagnetic oven control panel 5 by going between.As shown in Figure 2, during measurement, piezoelectric vibration sensors (piezoelectric ceramics) is connected to the piezoelectric vibration signal on the electromagnetic oven control panel by lead-in wire, by the amplification of the amplifying circuit on the electromagnetic oven control panel, MCU (single-chip microcomputer for example closes safe HT46R47 series monolithic) analysis and judgement.
The control mainboard can amplify shaping to the piezoelectric vibration signal, and carries out LPF, to reduce the influence of ambient sound and higher hamonic wave.Because piezoelectric transducer directly is attached to panel, its heat up water vibration duration and amplitude of causing are much higher than the ambient sound interference, and therefore anti-sound interference is to realize easily.
| The vibration number of measuring (per 10 seconds) | The state of observed water |
| 0 | Tranquil |
| ... | Tranquil |
| 11 | Tranquil |
| 26 | Tranquil |
| 119 | Tranquil |
| 831 | Slight hiss |
| 3367 | Hiss is gradually big |
| 7495 | Hiss is gradually big |
| 6399 | Hiss and sound |
| 6631 | Sound is gradually big, smolders |
| 5469 | Sound is big, smolders |
| 6579 | Sound is big, smolders, and slightly rocks |
| 6430 | Sound is gradually little, smolders, and the water bubbling, rocks |
| 4346 | Water boils, and sound is gradually big and overcast |
| 3808 | Water boils |
| 1539 | Water boils |
| 857 | Water boils |
Obviously, two characteristics are arranged when water boils, one, frequency sharply descend, will boil several seconds kinds of boiling to water from water in, frequency has the sudden change that descends; Two, frequency is lower, and amplitude was bigger when water boiled greatly.Can infer the boiling of water in view of the above easily.Whole heating process then has frequency from low to high, and general trend from high to low meets with daily life general knowledge again.Through the test of actual (tube) length time, judge that water boils the time promptly and accurately, and be not subjected to the influence of temperature, circulation of air situation.
When water is boiled enter keeping warm mode after, if add water, water temperature changes, and can cause that frequency of oscillation changes, and enters heated condition automatically thereby can control electromagnetic oven, this function is in that to boil the tea time particularly useful.
Piezoelectric vibration sensing temperature measuring equipment can independently use, and also can comprehensively use in conjunction with thermistor or far infrared temperature measuring equipment, to control the heating process of electromagnetic oven more meticulously.
Claims (4)
1. electromagnetic oven, it is characterized in that: this electromagnetic oven is provided with a vibrating sensor, and this vibrating sensor is attached to the electromagnetic oven housing, and is connected to the electromagnetic oven control panel by lead-in wire.
2. electromagnetic oven according to claim 1 is characterized in that: this electromagnetic oven control panel is provided with amplifying circuit and single-chip microcomputer, and described piezoelectricity switching signal is amplified by amplifying circuit, carries out analysis and judgement by single-chip microcomputer again.
3. electromagnetic oven according to claim 1 is characterized in that: this electromagnetic oven also comprises thermistor or far infrared temperature measuring equipment.
4. electromagnetic oven according to claim 1 is characterized in that: this vibrating sensor is a piezoceramic transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520064155 CN2878975Y (en) | 2005-09-08 | 2005-09-08 | Electromagnetic oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520064155 CN2878975Y (en) | 2005-09-08 | 2005-09-08 | Electromagnetic oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2878975Y true CN2878975Y (en) | 2007-03-14 |
Family
ID=37861394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520064155 Expired - Fee Related CN2878975Y (en) | 2005-09-08 | 2005-09-08 | Electromagnetic oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2878975Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103006041A (en) * | 2013-01-09 | 2013-04-03 | 胡达广 | Voiceprint recognition controlled energy-saving electric cooker |
| CN103256637A (en) * | 2013-06-13 | 2013-08-21 | 庄景阳 | Induction cooker with vibration frequency power-off protection function |
| CN106287853A (en) * | 2016-08-29 | 2017-01-04 | 浙江绍兴苏泊尔生活电器有限公司 | Induction cooker and induction cooker control method |
| CN107612122A (en) * | 2017-10-18 | 2018-01-19 | 国网山东省电力公司曲阜市供电公司 | The electric power system and rear service guaranteeing vehicle of firing equipment |
-
2005
- 2005-09-08 CN CN 200520064155 patent/CN2878975Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103006041A (en) * | 2013-01-09 | 2013-04-03 | 胡达广 | Voiceprint recognition controlled energy-saving electric cooker |
| CN103256637A (en) * | 2013-06-13 | 2013-08-21 | 庄景阳 | Induction cooker with vibration frequency power-off protection function |
| CN106287853A (en) * | 2016-08-29 | 2017-01-04 | 浙江绍兴苏泊尔生活电器有限公司 | Induction cooker and induction cooker control method |
| CN107612122A (en) * | 2017-10-18 | 2018-01-19 | 国网山东省电力公司曲阜市供电公司 | The electric power system and rear service guaranteeing vehicle of firing equipment |
| CN107612122B (en) * | 2017-10-18 | 2021-04-16 | 国网山东省电力公司曲阜市供电公司 | Power supply system and logistics support vehicle of heating equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070314 Termination date: 20100908 |