CN102235699A - Connecting structure of microwave oven transducer - Google Patents

Connecting structure of microwave oven transducer Download PDF

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Publication number
CN102235699A
CN102235699A CN201010156711XA CN201010156711A CN102235699A CN 102235699 A CN102235699 A CN 102235699A CN 201010156711X A CN201010156711X A CN 201010156711XA CN 201010156711 A CN201010156711 A CN 201010156711A CN 102235699 A CN102235699 A CN 102235699A
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CN
China
Prior art keywords
sensor
controller
microwave oven
filtering
transducer
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Pending
Application number
CN201010156711XA
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Chinese (zh)
Inventor
袁准
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Tianjin Appliances Co Ltd
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LG Electronics Tianjin Appliances Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by LG Electronics Tianjin Appliances Co Ltd filed Critical LG Electronics Tianjin Appliances Co Ltd
Priority to CN201010156711XA priority Critical patent/CN102235699A/en
Publication of CN102235699A publication Critical patent/CN102235699A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a connecting structure of a microwave oven transducer. The transducer is arranged outside a oven cavity of a microwave oven; through an observation hole on the oven cavity, infrared signals emitted by food in the oven cavity can be received and the food temperature is measured; temperature signals are converted into electrical signals and are input into a controller of the microwave oven; the transducer and the controller are connected through a circuit; and the transducer terminal and the controller terminal are provided with respective filter circuits which respectively act as a transducer filter and a controller filter which are respectively used for preventing transducer crash caused by noise of a clock terminal, filtering out noise caused by actions of various switches and relays in the operation process of the microwave oven, reducing the influence of noise on the transducer in the operation of the microwave oven, improving the response accuracy of the controller to the transducer signals, and reducing the misjudgment of the controller.

Description

The syndeton of sensor of microwave oven
Technical field
The invention belongs to the technical field of micro-wave oven, be specifically related to a kind of at sensor and controller the clock line and earth connection on sensor filtering and controller filtering are set respectively, thereby effectively suppress clocking noise and various switching noise, reduce the syndeton of various noises the sensor of microwave oven of sensor accuracy influence.
Technical background
Micro-wave oven is that magnetron produces microwave behind power connection, and these microwave irradiations on heating objects such as food and the device of cooking food.Such micro-wave oven can be divided into home-use micro-wave oven that is equipped with small-sized magnetron and the commerce micro-wave oven that is equipped with large-scale or a plurality of magnetrons.Micro-wave oven can also be divided into home-use micro-wave oven according to the mode of heat food and generally adopt rotation to fill the glass rotating disk mode of food, and commerce mainly adopts the figure of confusion mode of scattered radiation microwave with micro-wave oven.Commercial mainly be applicable to the convenience store that utilization rate is high and the food supply retail shop of cooking food at short notice, so generally need the high relatively output of more home-use micro-wave oven with micro-wave oven.
Fig. 1 is the microwave oven structure schematic diagram; Fig. 2 is the schematic diagram of the syndeton of sensor of microwave oven in the prior art.
As shown in Figure 1, micro-wave oven comprises by the shell that forms outward appearance, furnace chamber 20 and is positioned at the electricity storage chamber 30 of furnace chamber 20 right side sides, also comprises the door 40 that is located at furnace chamber 20 fronts.Right-hand member at the lateral surface of door 40 is provided with handle 41, and the two ends of handle 41 are screwed with door 40 and are connected.Shell forms the micro-wave oven outward appearance, also plays the effect of the inner furnace chamber 20 of protection simultaneously, so shell generally will be made of the steel plate with certain intensity.Shell comprises the rear board 17 at the base plate 13 below the top panel 11 of the top and two sides that cover furnace chamber 20 simultaneously, protection, the front panel 15 that forms furnace chamber 20 fronts and protection furnace chamber 20 back sides.Furnace chamber 20 is spaces of cooking such as cooking food thing, is made of the tetragonal chest of front openings, and the food after both can having put into food and take out the cooking from opening the place ahead of furnace chamber 20 is provided with the barbecue tube 21 that is used for baking food on the top of furnace chamber.There is certain space the right side side of furnace chamber 20, and this space is to be the electricity storage chamber 30 that electronic unit is set, and electricity storage chamber 30 inside are provided with a plurality of electronic units such as transformer 31, magnetron 33, capacitor 37.Be provided with control panel assembly 26 in the front of electricity storage chamber 30.
In addition, the inside of electricity storage chamber 30 is provided with demarcation strip 39 between transformer 31 and radiator fan 35.Transformer 31, radiator fan 35, capacitor 37 and demarcation strip 39 be fixed on sub-panel above.Between sub-panel and base plate 13 top at intervals.
In a plurality of electronic units, transformer 31 and magnetron 33 produce the microwave of irradiation furnace chamber 20 inside.Electronic unit generates heat in the process that produces microwave, so in the time of cooking food, the temperature of electricity storage chamber 30 rises.Need to suck extraneous air for the electricity storage chamber 30 of cooling off heating, so radiator fan 35 sucks extraneous air.
In the temperature sensor of micro-wave oven, sensor probe is arranged on outside the furnace chamber of micro-wave oven, see through the peephole that forms on the furnace chamber and receive the infrared signal that food sends in the furnace chamber and measure food temperature, temperature signal is converted to the controller that the signal of telecommunication is input to micro-wave oven; Sensor outer housing holds protection and fixation of sensor probe.
In the syndeton of the sensor of microwave oven of prior art, sensor 1 directly is connected with the clock line by data bus connection with controller 2, transmits clock and control signal mutually by data terminal SDA and clock end SCL, and GND is an earth terminal.Be easy to generate various noises in the use of microwave ovens process, itself will impact the microwave of micro-wave oven sensor, and microwave can produce noise at the clock end of sensor, and this noise can cause sensor to crash.Door switch, relay folding and stove lamp switch all can produce noise, above-mentioned noise can exert an influence at the controller end of micro-wave oven, controller can't correctly be judged the measurement numerical value of sensor accurately, cause misjudgment easily, thereby make the power execution work of micro-wave oven according to mistake.
Summary of the invention
The present invention for solve the technical problem that exists in the prior art provide a kind of at sensor and controller the clock line and earth connection on sensor filtering and controller filtering are set respectively, thereby effectively suppress clocking noise and various switching noise, reduce the syndeton of various noises the sensor of microwave oven of sensor accuracy influence.
The technical scheme that the present invention takes for the technical problem that exists in the solution prior art is:
The syndeton of sensor of microwave oven of the present invention, the sensor is arranged on outside the furnace chamber of micro-wave oven, seeing through the peephole that forms on the furnace chamber receives the infrared signal that food sends in the furnace chamber and measures food temperature, temperature signal is converted to the controller that the signal of telecommunication is input to micro-wave oven, sensor is connected by circuit with controller, in sensor side and controller end filter circuit is set respectively, respectively as sensor filtering and controller filtering.
The present invention can also adopt following technical measures:
The data terminal of described sensor, clock end respectively at controller between corresponding connection, by connecting data bus connection swap data between sensor and controller of sensing data end, controller, is drawn earth terminal simultaneously and is carried out ground connection to sensor clock end tranmitting data register signal by the clock line between sensor and controller.
In sensor side and the set filter circuit of controller end all is LPF.
The controller filtering of the sensor filtering of described sensor side setting and the setting of controller end is separately positioned between the clock line and earth connection of sensor and controller.
Adopt the two-stage filter of electric capacity parallel connection in the controller filtering of controller end.
Advantage and good effect that the present invention has are:
In the syndeton of sensor of microwave oven of the present invention, filter circuit is set respectively on the line between sensor and the controller, be arranged between clock end and the sensor ground connection at the sensor side wave filter, the noise that microwave is produced at the clock end when being used for the filtering running of microwave oven, prevent that the sensor that the noise on the clock end causes from crashing, and in the filter circuit of controller end setting is used for filtering running of microwave oven process because the noise that the various switches and the actuating of relay are produced comprises that door switch produces noise, the noise that noise and stove lamp switch produced that the relay folding produces etc.Various noises between sensor and the controller are removed by filter circuit or wave filter respectively, can be reduced that noise improves the reaction precision of controller to sensor signal to the influence of sensor in the running of microwave oven, reduce the false judgment of controller.
Description of drawings
Fig. 1 is the microwave oven structure schematic diagram;
Fig. 2 is the schematic diagram of the syndeton of sensor of microwave oven in the prior art;
Fig. 3 is the schematic diagram of the syndeton of sensor of microwave oven among the present invention;
Fig. 4 is the circuit diagram of sensor filtering among the present invention;
Fig. 5 is the circuit diagram of middle controller filtering of the present invention.
The specific embodiment
It is following that the present invention is described in detail with reference to drawings and Examples:
Fig. 3 is the schematic diagram of the syndeton of sensor of microwave oven among the present invention; Fig. 4 is the circuit diagram of sensor filtering among the present invention; Fig. 5 is the circuit diagram of middle controller filtering of the present invention.
Extremely shown in Figure 5 as Fig. 3, the syndeton of sensor of microwave oven of the present invention, wherein the sensor probe of micro-wave oven adopts a plurality of sample points simultaneously food temperature to be measured, and each sample point is arranged on the diameter of meal tray.Hardware such as temperature sensor, controller carried out initialization when micro-wave oven was started working; Sensor is started working, measure the temperature of each point on the residing pallet diameter simultaneously by a plurality of sample points, and judge the sample point number that drops on the object according to the temperature contrast between each point, the measurement result that does not cover or do not cover fully the sample point of object does not possess representativeness, is rejected, note position and the temperature information that cover each sample point on the object this moment fully, it is defined as 0 ° of measurement result; When pallet turns over 5 °, temperature sensor is measured the temperature of each point on pallet diameter this moment simultaneously by a plurality of sample points, and judge the sample point number that drops on the object according to the temperature contrast between each point, the measurement result that does not cover or do not cover fully the sample point of object does not possess representativeness, is rejected, note position and the temperature information that cover each sample point on the object this moment fully, it is defined as 5 ° of measurement results; After this note in the process that pallet rotates a circle revolution successively and cross the position and the temperature information of each sample point of 5 °, thereby draw the shape and the size of the temperature distribution state and the object of target object; Finishing 360 ° of rotations when pallet gets back to 0 ° of original position and began for second when rotation week, directly call the sample point position of first week during 0 ° of position, do not consider all number of sampling certificates of having rejected originally, thereby measure the shape size and the position for the treatment of food on the tray of microwave oven by the multi-sample point of sensor probe.When micro-wave oven heats the food in the furnace chamber, the temperature of food raises, sensor sees through the peephole that forms on the furnace chamber and receives the infrared signal that food sends in the furnace chamber and measure food temperature, temperature signal is converted to the controller that the signal of telecommunication is input to micro-wave oven, controller is made feedback to temperature signal, thereby the duty of change micro-wave oven adapts the operation of micro-wave oven and actual state at that time.
The data terminal SDA of sensor 1, clock end SCL respectively at controller 2 between corresponding connection, by connecting data bus connection swap data between sensor and controller of sensing data end, temperature sensor is delivered to controller with the signal of food on the one hand, controller judges at the signal of sensor on the other hand then, and feeding back to signal adjusts the working condition of sensor, controller, is drawn earth terminal GND simultaneously and is carried out ground connection to sensor clock end tranmitting data register signal by the clock line between sensor and controller.
Sensor is connected by circuit with controller, in sensor side and controller end filter circuit is set respectively, respectively as sensor filtering and controller filtering, filters at different noises separately and suppresses.In sensor side and the set filter circuit of controller end all is LPF.
The controller filtering of the sensor filtering of described sensor side setting and the setting of controller end is separately positioned between the clock line and earth connection of sensor and controller.Sensor filtering 3 is arranged between the ab, cd node of clock line and earth connection in the diagram, mainly is that microwave filters the noise that the clock end is produced during at running of microwave oven, to improve the operating accuracy of sensor.Adopt the 8551A chip in the sensor filtering, the cut-off frequency that comprises resistance R 1, R2 and the filtering of capacitor C sensor is 1/R2C.Controller filtering 4 is arranged between the AB, CD node of clock line and earth connection, what be primarily aimed at is that various switch produces various noises, by reducing the control accuracy that noise improves controller, avoid controller that rub-out signal is made false judgment, have influence on the normal operation of micro-wave oven.Adopt the two-stage filter of electric capacity parallel connection in the controller filtering of controller end, C=C1+C2, and the cut-off frequency of controller filtering is 1/RC.
In the syndeton of sensor of microwave oven of the present invention, filter circuit is set respectively on the line between sensor and the controller, be arranged between clock end and the sensor ground connection at the sensor side wave filter, the noise that microwave is produced at the clock end when being used for the filtering running of microwave oven, prevent that the sensor that the noise on the clock end causes from crashing, and in the filter circuit of controller end setting is used for filtering running of microwave oven process because the noise that the various switches and the actuating of relay are produced comprises that door switch produces noise, the noise that noise and stove lamp switch produced that the relay folding produces etc.Various noises between sensor and the controller are removed by filter circuit or wave filter respectively, can be reduced that noise improves the reaction precision of controller to sensor signal to the influence of sensor in the running of microwave oven, reduce the false judgment of controller.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention with preferred embodiment openly as above, yet, be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, certainly can utilize the technology contents of announcement to make a little change or modification, become the equivalent embodiment of equivalent variations, be the content that does not break away from technical solution of the present invention in every case, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all belong in the scope of technical solution of the present invention.

Claims (5)

1. the syndeton of a sensor of microwave oven, the sensor is arranged on outside the furnace chamber of micro-wave oven, seeing through the peephole that forms on the furnace chamber receives the infrared signal that food sends in the furnace chamber and measures food temperature, temperature signal is converted to the controller that the signal of telecommunication is input to micro-wave oven, sensor is connected by circuit with controller, it is characterized in that: in sensor side and controller end filter circuit is set respectively, respectively as sensor filtering and controller filtering.
2. the syndeton of sensor of microwave oven according to claim 1, it is characterized in that: the data terminal of sensor, clock end respectively at controller between corresponding connection, by connecting data bus connection swap data between sensor and controller of sensing data end, controller, is drawn earth terminal simultaneously and is carried out ground connection to sensor clock end tranmitting data register signal by the clock line between sensor and controller.
3. the syndeton of sensor of microwave oven according to claim 1 and 2, it is characterized in that: in sensor side and the set filter circuit of controller end all is LPF.
4. the syndeton of sensor of microwave oven according to claim 3, it is characterized in that: the controller filtering of the sensor filtering of sensor side setting and the setting of controller end is separately positioned between the clock line and earth connection of sensor and controller.
5. the syndeton of sensor of microwave oven according to claim 4 is characterized in that: the two-stage filter that adopts the electric capacity parallel connection in the controller filtering of controller end.
CN201010156711XA 2010-04-27 2010-04-27 Connecting structure of microwave oven transducer Pending CN102235699A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201010156711XA CN102235699A (en) 2010-04-27 2010-04-27 Connecting structure of microwave oven transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201010156711XA CN102235699A (en) 2010-04-27 2010-04-27 Connecting structure of microwave oven transducer

Publications (1)

Publication Number Publication Date
CN102235699A true CN102235699A (en) 2011-11-09

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CN201010156711XA Pending CN102235699A (en) 2010-04-27 2010-04-27 Connecting structure of microwave oven transducer

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112263136A (en) * 2020-10-30 2021-01-26 广东美的厨房电器制造有限公司 Control method and device of cooking equipment, cooking equipment and storage medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112263136A (en) * 2020-10-30 2021-01-26 广东美的厨房电器制造有限公司 Control method and device of cooking equipment, cooking equipment and storage medium
CN112263136B (en) * 2020-10-30 2022-02-15 广东美的厨房电器制造有限公司 Control method and device of cooking equipment, cooking equipment and storage medium

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Application publication date: 20111109