CN100383313C - Drying controller and control method for drying machine - Google Patents
Drying controller and control method for drying machine Download PDFInfo
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- CN100383313C CN100383313C CNB021211612A CN02121161A CN100383313C CN 100383313 C CN100383313 C CN 100383313C CN B021211612 A CNB021211612 A CN B021211612A CN 02121161 A CN02121161 A CN 02121161A CN 100383313 C CN100383313 C CN 100383313C
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- drying
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- oven dry
- sensor
- dryer
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Abstract
The present invention relates to a drying controller and a control method of a drying machine. The drying controller comprises a sensor, a control part, a heater and a supply fan, wherein the sensor is arranged in a drying object container; the control part is connected with the sensor; the heater and the supply fan are controlled by the control part; the sensor is a moisture sensor and is a bridge circuit composed of an airflow opened thermistor, an airflow sealed thermistor, a fixed resistor and a variable resistor; the control part can be connected with a selective signal input part. The sensor can accurately measure the absolute temperature of drying objects and can also accurately control the drying degree of drying objects in the drying machine according to the absolute temperature to improve the performance of the drying machine.
Description
Technical field
The present invention relates to a kind of dryer, relate in particular to a kind of oven dry control device of dryer.
Background technology
One of household appliances that are easy to see in general family are exactly washing machine.In the washing machine of up-to-date product, increased drying function again to realize multi-functional compoundization.This washing machine or the dryer that possesses drying function is by after utilizing heater with air heat, controls it and circulates in the cylinder of washings is housed and realize the control of the oven dry of washings action.
Please refer to Fig. 1 to understand the structure and the operation process of existing dryer.
Fig. 1 is the pie graph of common dryer.As shown in the figure, exterior case 1 forms the face shaping of dryer; Front panel 3 is installed in the front of the end formation dryer of exterior case 1.
Be equipped with the washings input wherein and the rotatable cylinder 5 of drying the inside of exterior case 1, in cylinder 5 inside several stirring wings 6 is arranged, and stirring wing 6 plays the agitator treating thing when cylinder 5 rotations.This cylinder 5 is to rotate under the effect of the drum driven belt 7 on its outer ring.And the drum driven belt 7 here is to drive by other drive source.
Can make the door 8 of the inside of cylinder and external communications selectively, on the front panel 3 with the front end that can the switching mode be installed in cylinder.Form the exhaust outlet 10 towards cylinder 5 inside openings on the position of the inside of corresponding front panel 3, this exhaust outlet 10 has the effect that the air of cylinder 5 inside is discharged to cylinder 5 outsides, and its porch is equipped with and is used for removing the filter 12 that is mingled in airborne foreign matter.
Side at described exhaust outlet 10 is equipped with the preceding utmost point sensor 30 that is used for measuring cylinder 5 temperature inside in the oven dry action when carrying out, should preceding utmost point sensor 30 be temperature sensors, the voltage difference that utmost point two ends produced before when contacting with washings and sense temperature, and perceptual signal exported with the voltage signal form.
The inboard of plate 3 forms the air exhaust passage 13 that is connected with exhaust outlet 10 in front, and the continuous earthing of air exhaust passage is equipped with pressure fan assembly 15, is connected with the exhaust duct 17 that the air of being discharged by air exhaust passage 13 can be discharged to the dryer outside on the pressure fan assembly 15.
In addition, the blast pipe 18 to cylinder 5 delivered inside air is installed on the position of the bottom of the respective rollers 5 of the inside of casing 1 externally, blast pipe 18 is carried air by the rear of cylinder 5 in cylinder 5.Side at this blast pipe 18 is equipped with heater 19.
Below, the course of action of the air circulation of carrying out in order to realize drying purpose in constituting aforesaid existing dryer is illustrated.
At first door 8 is opened, the washings of needs oven dry is put into cylinder 5.After door 8 shut, if input oven dry actuating signal, then cylinder 5 began rotation under the effect of drive source.In addition, pressure fan assembly 15 begins action, and the air in the cylinder 5 is arranged to above-mentioned exhaust duct 17.
If the air of cylinder 5 inside is discharged from, air outside will be drawn onto in the cylinder 5 by blast pipe 18 so, and this air is to be transported in the cylinder 5 after being positioned at heater 19 heating of blast pipe 18 porch and reaching uniform temperature.
Be transported to the moisture in the absorption of air washings of cylinder 5 inside, flow to air exhaust passage 13 by exhaust outlet 10 under the driving of pressure fan assembly 15, air is discharged to the outside by pressure fan assembly 15 via exhaust duct 17 in air exhaust passage 13.
Here, the air of the exhaust outlet 10 of flowing through is cleaned under the effect of filter 12, and this process has played not make mixes aerial foreign matter (as the end of a thread of washings, fine hair etc.) and enter the effect in the pressure fan assembly 15.
In addition, in the control part (not shown), the value of measuring of preceding utmost point sensor 30 kind and the degree of drying according to the oven dry thing configured.Therefore the value of measuring that configures according to the kind of drying thing when oven dry action beginning is discerned for the basis, and control heater 19 actions make it heating.The outer air that is inhaled into cylinder 5 inside by blast pipe 18 is positioned at heater 19 heating of the porch of blast pipe 18, is transported in the cylinder 5 after reaching uniform temperature.
Air by this action under the state of cylinder 5 inner loop, the temperature of preceding utmost point sensor 30 perception oven dry thing, and the signal that the perceives form with voltage signal transmitted to control part.Here, preceding utmost point sensor 30 is to utilize the sensor to touch voltage difference that oven dry produces at the preceding utmost point two ends during thing and sense temperature, and with the form output with voltage signal of the temperature that perceives.
Before the perception value of utmost point sensor 30 import control part constantly, the variation of the voltage value that control part can be perceived according to preceding utmost point sensor 30 is judged by the degree of drying of baking thing.
But there are following problems in the oven dry control device of existing dryer.
The perception value of utmost point sensor is that different degree of dryings is realized on the basis before the control device of existing dryer.Promptly when oven dry when just having begun,, therefore have no problem in the control realizing because voltage difference is bigger in the detected perception value of preceding utmost point sensor.When aridity rises to 80% when above, the missionary society by the detected sense voltage of preceding utmost point sensor diminishes but as shown in Figure 2.
Promptly as shown in Figure 2, the value of being come out according to temperature detection by preceding utmost point sensor 30 is converted into voltage input control part, and control part is judged degree of drying according to the variation of the voltage value of input.But diminish from the missionary society that to a certain degree begins detected voltage value, therefore have the significantly reduced problem of resolving power of final feasible preceding utmost point sensor.
Summary of the invention
Rise to the certain value trickle temperature contrast of perception difficulty relatively when above at utmost point sensor before employed in the existing dryer at degree of drying, and will finally bring the too high or too low problem of degree of drying of oven dry thing; The objective of the invention is to design and provide a kind of oven dry control device and control method of dryer,, improve the performance of dryer with the degree of drying of oven dry thing in the accurate control dryer.
To achieve these goals, the present invention adopts following design: a kind of oven dry control device of dryer comprises the control part and heater that is controlled by control part and the pressure fan that are located at the humidity sensor of oven dry in the container, join with humidity sensor; Described humidity sensor is characterized in that to the open thermistor of air flow, thermistor and two bridge circuits that resistance is formed to the air flow sealing one is fixed resistance in described two resistance by one, and another is a variable resistor.
The oven dry control device of aforesaid dryer, wherein control part can be connected to the user and select signal input part.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the pie graph of common dryer
Fig. 2 is the perception oscillogram when utmost point sensor is realized the oven dry action before utilizing in the prior art
Fig. 3 is the oven dry control device pie graph of dryer of the present invention
Fig. 4 is the pie graph of the humidity sensor that uses among the present invention
Perception oscillogram when Fig. 5 realizes the oven dry action for utilizing humidity sensor among the present invention
The specific embodiment
Oven dry control device to dryer of the present invention is described in detail with reference to the accompanying drawings.
Fig. 3 is the pie graph of the oven dry control device of dryer of the present invention.The internal structure of required dryer is illustrated with reference to Fig. 1 during in addition for explanation.
The feature of the oven dry control device of dryer of the present invention is the humidity sensor 50 that has adopted as the Back ground Information of the control oven dry action that detects usefulness.Described humidity sensor 50 is installed in and is easy to perceive on the pressure fan casing position of humidity.Being formed among Fig. 4 in detail of the humidity sensor 50 that is adopted among the present invention illustrated.
In addition, the present invention also comprises the control part 52 of controlling optimal oven dry action according to the selected drying condition of user, and the kind (kind of clothing) and the humidity value of degree of drying of all that might select in the product being dried things in this control part 52 are pre-set.Action will set value when carrying out and the detection signal of humidity sensor 50 compares when drying, thereby the control oven dry is moved.
Particularly the value of measuring of the humidity sensor 50 that constitutes with two thermistors in the present invention serves as that basis control oven dry is moved.Shown in the image pattern 5 to measure oscillogram the same, above-mentioned control part 52 is to utilize the size of poor (Gap) between two thermistor values of measuring to judge degree of drying.In addition, the number of times that utilizes described extent and reach maximum temperature waits and judges that whether oven dry finish.Promptly this control part 52 serves as basis control oven dry action with these data according to the data of the kind storage oscillogram as shown in Figure 5 of oven dry thing again.
Can also be connected to the signal input part 54 of input user's selection signal in addition, the selection signal of described signal input part 54 is to these control part 52 outputs.Above-mentioned signal input part 54 according to the kind of oven dry thing will for the diversified condition of the drying effect of realizing optimum state to above-mentioned control part 52 outputs.Heater 19 then is driven along with the oven dry action under the control of control part 52.
Fig. 4 is the detailed circuit diagram of humidity sensor of the present invention.
The bridge circuit that humidity sensor among the present invention is made up of 60,62 and fixed resistances 64 of two thermistors and variable resistor 66.In constituting aforesaid bridge circuit, with perception humidity, another thermistor is then to the air flow sealing and the only variation of sense temperature to the air flow opening for thermistor.Therefore the thermistor that opens in the metal chassis in the atmosphere is the sensor element that perception humidity is used, and the interior thermistor of metal chassis that is installed in sealing is the sensor element that temperature-compensating is used.
Constitute variable resistor 66 values are changed so that the voltage at bridge circuit two ends is identical, do not have electric current to flow in the circuit thereby make.Afterwards, when around humidity along with the carrying out of oven dry when changing because the thermistor that changes in the air is externally arranged in the composed component and the environment of the sealing isolated with extraneous air in thermistor, so its resistance value can change.Because the above-mentioned bridge circuit of this variation can produce the voltage signal that changes with ambient humidity, light and temperature.
Promptly open at the influence that thermistor in the surrounding enviroment can be subjected to humidity, sealed up thermistor only is subjected to Temperature Influence.Therefore the difference of the value of measuring of two thermistors is detected is absolute humidity in the atmosphere.
Dry control procedure to dryer of the present invention is illustrated below.
In dryer of the present invention, in order to realize control to drying course, in the control part 52 kind and the degree of drying according to the washings of need oven dry the possible detected humidity value shown in the image pattern 5 has been configured.
The user selects to be fit to the oven dry action of desirable condition by signal input part 54, as long as selected signal input control part 52, the drying that control part 52 just can be controlled Realization by Machine and the condition imported adapts is moved so.
At first, control part 52 is according to the kind of the selected drying condition of user identification washings, and control part 52 configured according to the kind identification of the washings that identifies with the corresponding humidity value of degree of drying.Described numerical value can change its size along with the carrying out of oven dry.
Being transported to air in the cylinder 5 can absorb the moisture in the washings and flow and be discharged to the outside via exhaust duct 17 to air exhaust passage 13 by exhaust outlet 10 under the driving of pressure fan assembly 15.
Under the state that this air circulation action is carried out, the washings that is contained in the cylinder 5 is dried.At this moment control part 52 is according to the ON/OFF of the drying condition control heater 19 of identification when the drying action beginning, thus the action of the drying of index drum 5 inside.
In addition, in the process that oven dry is carried out, the amount of moisture that is included in the circulating air can produce difference, and humidity sensor 50 can detect this species diversity; As mentioned above, in humidity sensor 50, be subjected to moisture and Temperature Influence, thereby and another thermistor is closed in air flow only is subjected to Temperature Influence thereby a thermistor opens at air flow.
In constituting aforesaid humidity sensor 50, the resistance value of two thermistors can change along with the variation of the humidity of surrounding environment in the process that washings is dried.At this moment the balance of voltage of bridge circuit is broken, and can produce electric current and be imported into control part 52 with the form of voltage signal at the output of the humidity sensor 50 that constitutes with above-mentioned bridge circuit form.
Described control part 52 has to be closed in the detected next signal of airborne thermistor and to open at the detected next signal of airborne thermistor to be imported wherein, and it also calculates the difference signal of two signals.Promptly calculate the signal of difference of the value of measuring of two thermistors shown in Fig. 5.Be identified as cylinder 5 humidity inside amount signals through the difference signal that draws like this.
In addition, control part 52 utilizes difference signal and the judgements such as number of times that reach maximum temperature to dry the time point of finishing after humidity sensor 50 detected humidity amounts (difference signal) reach certain value.
Therefore the present invention can prevent the incorrect phenomenon of detected signal owing to judge that according to the size of the humidity sensor of above-mentioned two thermistors formation detected poor (Gap) the humidity amount is a degree of drying.
The present invention can obtain following effect:
The first, the present invention is because to utilize the difference signal of the detected signal of two thermistors to judge existing The time ongoing degree of drying, therefore can be according to detected signal accurately poor, to oven dry is moving certainly Doing beginning to end controls accurately.
The second, the present invention can prevent that transition from appearring in washings by the accurately control to the drying action Dry or undried phenomenon, thus the consumer improved to product by adjusting best oven-dried condition Satisfaction.
Claims (2)
1. the oven dry control device of a dryer, the control part and heater that is controlled by control part and the pressure fan that comprise the humidity sensor that is located in the oven dry container, join with humidity sensor; Described humidity sensor is characterized in that to the open thermistor of air flow, thermistor and two bridge circuits that resistance is formed to the air flow sealing one is fixed resistance in described two resistance by one, and another is a variable resistor.
2. the oven dry control device of dryer according to claim 1 is characterized in that described control part can be connected to the user and select signal input part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021211612A CN100383313C (en) | 2002-06-11 | 2002-06-11 | Drying controller and control method for drying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021211612A CN100383313C (en) | 2002-06-11 | 2002-06-11 | Drying controller and control method for drying machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1465764A CN1465764A (en) | 2004-01-07 |
| CN100383313C true CN100383313C (en) | 2008-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021211612A Expired - Fee Related CN100383313C (en) | 2002-06-11 | 2002-06-11 | Drying controller and control method for drying machine |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007119969A2 (en) * | 2006-04-14 | 2007-10-25 | Lg Electronics Inc. | Dryer and controlling method thereof |
| KR101613965B1 (en) | 2014-12-08 | 2016-04-20 | 엘지전자 주식회사 | Control method for exhaust-type dryer |
| KR101613963B1 (en) | 2014-12-08 | 2016-04-20 | 엘지전자 주식회사 | Clothes treating apparatus with a heat pump system |
| CN105671858B (en) * | 2015-01-04 | 2018-02-23 | 海信（山东）冰箱有限公司 | The control method and roller washing machine of a kind of roller washing machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1502919A (en) * | 1975-03-24 | 1978-03-08 | Hitachi Ltd | Clothes drier |
| GB2199676A (en) * | 1986-12-30 | 1988-07-13 | Samsung Electronics Co Ltd | Tableware washer control |
| JPH02257998A (en) * | 1989-03-30 | 1990-10-18 | Sanyo Electric Co Ltd | Sensor output amplifying circuit for clothes dryer |
| CN1053518A (en) * | 1991-02-22 | 1991-07-31 | 大连发电总厂 | A kind of temperature difference control type automatic drying device of electric machine |
| US5105555A (en) * | 1990-01-11 | 1992-04-21 | Shoji Nakagomi | Plastic drying apparatus |
-
2002
- 2002-06-11 CN CNB021211612A patent/CN100383313C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1502919A (en) * | 1975-03-24 | 1978-03-08 | Hitachi Ltd | Clothes drier |
| GB2199676A (en) * | 1986-12-30 | 1988-07-13 | Samsung Electronics Co Ltd | Tableware washer control |
| JPH02257998A (en) * | 1989-03-30 | 1990-10-18 | Sanyo Electric Co Ltd | Sensor output amplifying circuit for clothes dryer |
| US5105555A (en) * | 1990-01-11 | 1992-04-21 | Shoji Nakagomi | Plastic drying apparatus |
| CN1053518A (en) * | 1991-02-22 | 1991-07-31 | 大连发电总厂 | A kind of temperature difference control type automatic drying device of electric machine |
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| Publication number | Publication date |
|---|---|
| CN1465764A (en) | 2004-01-07 |
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Granted publication date: 20080423 Termination date: 20100611 |