CN100383333C - Safety gas shut-off device of drier and method thereof - Google Patents
Safety gas shut-off device of drier and method thereof Download PDFInfo
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- CN100383333C CN100383333C CNB021581479A CN02158147A CN100383333C CN 100383333 C CN100383333 C CN 100383333C CN B021581479 A CNB021581479 A CN B021581479A CN 02158147 A CN02158147 A CN 02158147A CN 100383333 C CN100383333 C CN 100383333C
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Abstract
The present invention discloses a safety coal gas cut-off device of a drier and a method thereof. After the rotary RPM of an exhaust fan is detected, the rotary RPM of the exhaust fan is used for sensing whether the exhaust fan normally works, and also, whether flame exists is sensed by a flame sensing sensor. Operating states of more than two coal gas supplying valves in series connection are controlled based on the value sensed in the way in order to control the coal gas supply under a safe state. The false operation of a heater caused by false actions, external data., under the control of an electronic control device is prevented, product damaged and washed product damage are prevented, and product safe drive and product reliability are increased.
Description
Technical field
The present invention relates to dryer, especially the gas safety shearing device and the method thereof of dryer.
Background technology
The major part structure of prior art dryer as shown in Figure 1, cylinder 1 is arranged on the inside of casing, casing forms the outward appearance of dryer.Cylinder 1 is the open drums in both ends; The outer peripheral face of cylinder 1 is formed with belt grooves 2, can be wound with the drum belt that drives by independent drive source on the belt grooves 2.Be formed with the oven dry space 5 of carrying out oven dry in the cylinder 1.The inside in oven dry space 5 is formed with baffle plate 6, and when cylinder 1 was rotated, 6 pairs of washings in oven dry 5 inside, space of baffle plate overturn.
The front end of cylinder 1 is provided with front head 7; The rear end of cylinder 1 is provided with back head 9.The open portion that front head 7 and back head 9 are respectively applied for the shutoff cylinder forms oven dry space 5, and the front-end and back-end of difference back-up roller 1.At this moment, be provided with between counterrotating front head 7 and the cylinder 1 and prevent the seal member 10 that leaks; Be provided with between counterrotating front head 9 and the cylinder 1 and prevent the seal member 10 that leaks.Certainly, for back-up roller 1, there are several pulleys (not having diagram) to be arranged on the pairing position, front-end and back-end of cylinder 1.Be formed with through hole 8 on the front head 7, through hole 8 is communicated with the inside and outside of oven dry space 5.Optionally open and close through hole 8 by door.
On the one hand, a side of the front head 7 of the lower end correspondence of the through hole 8 of front head 7 is provided with spout assembly 13, and spout assembly 13 is used for the air of oven dry 5 inside, space is discharged.Spout assembly 13 is provided with gauze filter 14.The effect of gauze filter 14 is to be used to collect be mingled in the airborne foreign matter of discharging from oven dry space 5, as the end of a thread or dust etc.
In addition, be provided with the gauze passage 15 that is connected with spout assembly 13, gauze filter 14 is set to the inside of gauze passage 15.Also be provided with the exhaust blower 17 that is connected with gauze passage 15, exhaust blower 17 is extracted the air of oven dry 5 inside, space out by gauze passage 15.Exhaust blower 17 is arranged on the inside of exhaust blower shell 18.One side of exhaust blower shell 18 is connected with gauze passage 15, and the opposite side of exhaust blower shell 18 and blast pipe 19 are connected.Air behind 5 discharges of oven dry space and the gauze passage 15 of flowing through is discharged to the outside by blast pipe 19 by the suction of exhaust blower 17.
On the one hand, be provided with the hot-air channel 20 that is connected with air feed passage 12.Hot-air channel 20 provides required hot blast to the inside in oven dry space 5.The inlet of hot-air channel 20 is provided with the air nozzle 22 that constitutes gas burner.The effect of air nozzle 22 is to be used to spray the coal gas that supply is come.Have valve on the air nozzle 22, valve is used to control the supply of coal gas.The 23rd, gas pipe.Be provided with the mixing tube 24 that prolongs to inside at the inlet of hot-air channel 20, coal gas that will spray from air nozzle 21 at mixing tube 24 and primary air form and mix.That is to say that the extraneous air that coal gas that will eject from air nozzle 22 in the inside of mixing tube 24 and the inlet by mixing tube 24 flow into mixes.The front end of mixing tube 24 is provided with spark plug 26, and spark plug 26 produces the spark that is used to light a fire.
Below, the control of dryer with said structure is described:
As shown in Figure 2, existing dryer is a mechanical device of finishing the oven dry action under the control of microcomputer 100.Therefore, the signal that detects is outputed in the microcomputer 100 by electronically controlled drive division and each sensor that detects electronic signal.Perhaps, be subjected to electronically controlled drive division and each sensor that detects electronic signal from microcomputer 100, to accept controlled signal in dryer inside.
At first, the power supply power supply signal selected according to the user of input, oven dry actuating signal and for the signal of importing drying condition etc.Be sent to the press key input section 103 of microcomputer 100 then, electrode sensor just detects in the oven dry degree of washings, and detecting signal is sent to 100 li of microcomputers by electrode sensor signal change section 106.
First temperature sensor detects the hot blast temperature that is provided to cylinder 1 inside, by being sent in the microcomputer 100 behind the first temperature sensor signal change section, 109 its signals of transformation.Second temperature sensor detects the temperature of the hot blast of discharging in the cylinder, is sent in the microcomputer 100 after the second temperature sensor signal change section 112 changes its signals.In order to prevent that door is opened in the oven dry action, the detecting signal of door sense part 115 grades also correspondingly is sent in the microcomputer 100.
The exhaust blower motor that promising swing roller 1 produces the Rolling motor of driving force and produces driving force for rotation exhaust blower 17 is set.The exhaust blower motor driving part 121 that produces the Rolling motor drive division 118 of Rolling motor driving force and produce exhaust blower motor-driven power is under the control of microcomputer 100, by action taking place or stopping to come the rotation of index drum and the rotation of exhaust blower 17.The heater-driven portion 124 that supplies with thermal source drives under the control of microcomputer 100.
The dryer that regards to the prior art with said structure down describes:
Close to the doorstep drop into washing bag to be dried in the oven dry space that the inside of cylinder forms after, by the action knob that is provided with on button enter key 103, microcomputer 100 will correspondingly be fulfiled oven dry action, head roll motor driving part 118.At this moment, the belt that is twining on the belt grooves 2 is driven by other drive sources, also correspondingly rotation of cylinder 1 simultaneously.
At first, microcomputer 100 applies control signal for exhaust blower motor driving part 121, drives the exhaust blower motor.Control exhaust blower 17 moves, and simultaneously, by the air of gauze filter sucking-off oven dry 5 inside, space, flows into extraneous air by air feed passage 12 to the inside in oven dry space 5.
Then, microcomputer 100 drives heater-driven portion 124, can form high relatively temperature when controlling the air process hot-air channel 20 that supplies to air feed passage 12.This moment, microcomputer 100 controls were supplied with by the coal gas of air nozzle 22 in fact, drove valve, controlled the igniting action of spark plug 26 etc. simultaneously.
After spark plug 26 was lighted a fire action for the first time, coal gas was ejected into the inside of mixing tube 24 by air nozzle 22, carries out sustained combustion.The heat energy that coal gas produces when burning heats hot-air channel 20 inner inhaled airs, makes air become hot blast.Hot blast reaches inside in the oven dry space 5 of cylinder 1 by air feed passage 12.Inside hot blast in oven dry space 5 absorbs the moisture that the washing bag contains, and because of the effect of the attraction of exhaust blower 17, moisture flows out by spout assembly 13, and the air that flows out spout assembly 13 is during by gauze filter 14, and foreign matters such as dust and the end of a thread obtain filtration.
By above-mentioned hot air circulation mode, when the washings of cylinder 1 inside was dried, microcomputer 100 served as the oven dry degree that washings is judged on the basis with the perception value of electrode sensor signal transformation component 106.And, based on the temperature of the cylinder that detects at the first temperature sensor signal transformation component 109 1 inner hot blast that flows into and the temperature of the cylinder 1 outside hot blast of discharging that the second temperature sensor signal transformation component 112 detects, the final oven dry degree of judging washings is controlled its oven dry action.
But there is following problem in the prior art with said structure:
Existing dryer is the attraction that produces by exhaust blower 17, carries out the inside and outside air circulation of cylinder 1, and control is to the heat supply of cylinder 1 inside.Under the driven state of heater that produces heat energy, carry out the driving of exhaust blower 17.If exhaust blower 17 cisco unity malfunctions, heat energy because of the heater generation, cylinder 1 temperature inside can continue to rise, therefore the air circulation of cylinder between inside and outside just can not normally be carried out, washings in the oven dry will be damaged, more seriously may breaking out of fire, and the coil Yin Gaowen that constitutes heater block can shorten the life-span.
When existing dryer was dried action, microcomputer 100 did not but have in control action whether judge the exhaust blower regular event by the action of heater-driven portion 124 control heaters.Existing dryer just after microcomputer 100 drives the exhaust blower motor, makes its action through fix time back control heater.
Existing dryer when the malfunction of the malfunction of microcomputer 100 or exhaust blower 17 takes place because of not having the action of prevention heater, have the problem that produces fire because of the malfunction of a part of parts, can reduce the reliability of product, threaten user's safety simultaneously, so be considered as fatal defective.
Except the problems referred to above, existing dryer is in the supply of not knowing under the flame normal presence whether situation control coal gas, can cause the danger of exploding and the problem that exists the oven dry action normally not move because of residual coal gas.
In order to illustrate in greater detail the problem of existence, the oven dry action that has dryer now is described in detail below:
Shown in Fig. 3,4, at first, combustion control device includes when opening and closing valve 25, initial stage igniting action for spark plug 275 that flame takes place and the sensor 272 that carries out the thermometal sheet form of ON/OFF action according to Temperature Influence.Open and close valve 25 and have coil 266,269,278, possessing most coils is because valve 25 is valves more than 2 of series connection, promptly could pass through valve 25 under the situation that coil is all worked and supply with coal gas.Combustion control device first goes into portion and is provided with thermostat 263.Sensor 272 and thermostat 263 are to keep opening state not having under the heated state, are converted to off status when the driving of heater is issued to uniform temperature.
In the coil of valve 25, be used for the last coil 269 ratio sensors 272 resistance value height that drive.This is in order electric current to be provided at first for spark plug 275 by sensor 272 under the power supply supply condition in the early stage.
Existing combustion control device is under the initial stage operating state that is not having heat, and sensor 272 and thermostat 263 are to keep opening state, so power supply provides electric current for spark plug 275 by the sensor 272 of opening state, heating spark plug 275 when supplying with.The heat that spark plug 275 heating produce converts sensor to off status.The electric current of supplying with can not can supply in the coil 266,269,278 that drives valve 25 by the sensor 272 of off status, thereby the state that by-pass valve control becomes out continues heating according to the coal gas of supplying with and produces the dryer necessary energy.
After the oven dry action of dryer is finished, in the time of stopping the driving of heater, the electric current of each coil 266,269,278 of control part sever supply, the action of by-pass valve control 25 becomes off status, thus the coal gas that supplies to mixing tube 24 is cut off.
After carrying out the fire extinguishing action, institute fixes time between (several seconds) because of the existence of the hot-air channel 20 inner latent heat that are left, and sensor 272 is as shown in Figure 4, can keep the state of holding.
The user applies order or because of malfunction service voltage on combustion control device of control part, can not supply with electric currents toward spark plugs 275 by the sensor of opening 272 in order to re-execute oven dry action.The electric current of supplying with this moment then flow in the coil 266,269,278 that the on-off action because of gas valve 25 drives.In this case, because do not confirm at the control part of control burner whether burning is normally carried out, the result causes unnecessary coal gas to supply with, and causes waste of fuel, can not dry action normally.And fireless state lower valve 25 passes through the coal gas that air nozzle 22 is ejected into mixing tube and can not carry out normal burning from what gas pipe 23 was supplied with, and take place residual under the above situation about keeping out of fix time.If carry out the igniting action of spark plug 26, there is the danger of blasting in the coal gas of filling because of mixing tube 24.
When existing dryer takes place in the malfunction of exhaust blower 17, the protective device that stops the heater action is not set, may breaking out of fire when the part parts make a mistake action so have.Again because of not knowing that control coal gas is supplied with under the state that flame exists, so potential danger of blasting because of residual coal gas.
Summary of the invention
Technical problem to be solved by this invention provides a kind of existence by flame and whether controls the coal gas supply, and carries out the gas safety shearing device and the method thereof of the dryer of safe oven dry action.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of gas safety shearing device of dryer, described dryer is the inside that the air of heating is supplied to cylinder, the heating, drying washings, again the air in the swing roller is discharged to the outside, thereby dry, comprise the exhaust blower motor that produces the air be circulated in the cylinder and flow, add the hot-air heater toward cylinder internal feed hot blast, it is characterized in that also comprising the speed that detects exhaust blower, thereby judge regular event whether regular event decision means; The existence whether flame that detects the action formation flame of heater detects parts; Be subjected to regular event decision means and flame to detect the control of parts, thereby give the heating fuel driver part of supplying with heating fuel in the heater and driving.
Described heating fuel driver part is that the valve with series connection more than two constitutes, and regular event decision means and flame detect parts and controls in the plural valve each one respectively.
A kind of gas safety cutting-off method of dryer produces exhaust blower motor that the air be circulated on the cylinder flows and in order to add the hot-air heater toward cylinder internal feed hot blast, it is characterized in that comprising with the next stage for possessing:
A, oven dry action beginning, the revolving process of rotation exhaust blower;
Whether b, the rotary speed of judging exhaust blower reach the above judgement stage of certain speed;
C, detect the stage that detects that whether has flame along with the driving of heater;
D, the signal that detects based on the signal of judging the stage and the stage that detects, the driving of control heater, the coal gas supply stage that fuel gas is supplied with.
Exhaust blower motor of the present invention is the above rotation of certain speed, when flame exists, the supply of control coal gas, control produces the heater of high heat energy safely, prevent that under the control of electronic-controlled installation heater causes malfunction by malfunction or because of external data etc., prevent the breakage of product and the damage of washings, improve the safety driving of product and the reliability of product.
Description of drawings
Fig. 1 is the exploded perspective view of the dryer pith structure of prior art.
Fig. 2 is the control structure figure of the dryer of prior art.
Fig. 3 and Fig. 4 are the structure charts according to the combustion control device of prior art dryer.
Fig. 5 is the control structure figure of the gas safety shearing device of dryer of the present invention.
After Fig. 6 is the operate as normal of perception exhaust blower motor in the present invention, the structure chart of the action of control coil.
Fig. 7 is the structure chart of the duty of judgement flame detecting sensor of the present invention.
Fig. 8 is the control method figure of dryer of the present invention.
Among the figure, 30: rectification circuit; 33: spark plug; 36,39,42: coil; 45: the photoelectricity detecting sensor; 48, TR1, TR2: transistor; 31: the exhaust blower motor; 300: the speed detecting element; 310: frequency/transformer; 320: comparator; 46: opto-electric connector.
The specific embodiment
Be described in further detail below in conjunction with the gas safety shearing device and the method thereof of the drawings and specific embodiments dryer of the present invention:
As shown in Figure 5, in the gas safety shearing device of the present invention, the 1st power end L goes up the 1st input that is connected to commutating circuit 30 by switch SW 1.The last switch SW 2 of the 2nd power end N, SW3 are connected to the 1st input of commutating circuit 30.The igniter 33 and the flame detecting sensor 45 of connecting between switch SW 1 and the commutating circuit 30 and between the 2nd power end N and moving for the initial stage igniting of heater.
Igniter 33 is the devices that produce flame when lighting a fire for 26 initial stages of spark plug shown in Figure 1.Flame detecting sensor 45 is according to heat and open/close thermometal sheet sensor does not have hot time maintenance to open state, and the perception uniform temperature automatically switches to off status when above.The actuating signal of flame detecting sensor 45 is communicated to microcomputer 100, and this part describes in detail below.
The effect of the flame detecting sensor 45 of series connection is when not having the hot initial stage to move, supply with electric current for igniter 33 by the flame detecting sensor 45 of keeping out state, flame detecting sensor 45 is to off status, the action of cut-out point firearm 33 after producing heat on the igniter 33.
Gas safety shearing device of the present invention comprises most valve coils that connect on the commutating circuit 30.One side output of commutating circuit 30 is connected to earthing potential GND, and another output is connected to mixing tube and supplies with the switching of valve of coal gas with on the coil.
The valve 25 that the present invention supplies with coal gas for mixing tube 24 is that three valves that are in series constitute.After three valves all move, could supply with coal gas.The switch motion of each valve supplies with electric current for the coil 36,39,42 of the output that is connected commutating circuit 30.
In the present invention, the same the valve that is driven by two coils 36,39 with the valve that the ON/OFF control of prior art forms, and another one coil 42 be drive apply control the valve of the degree of opening by the size of dc voltage.
In parallel at the coil 39 that the output of rectification circuit 30 constitutes with coil 36.Coil 39 is by driving components and parts 48 controls from driving because of microcomputer 100.Driving components and parts 48 is the switching mode components and parts, can open and close the current channel of coil 39 by the control of microcomputer 100.When output drives the high signal of components and parts 48 in microcomputer 100, the current channel that coil 39 forms, coil 39 is driven valve open simultaneously.
For drive coil 42, coil 42 is by the opening degree of the big or small by-pass valve control of the DC power supply of supplying with.
Below the action according to the gas safety shearing device of dryer of the present invention is further specified:
Power supply is supplied with, and the electric current supply of flame detecting sensor 45 of keeping the initial stage duty is to igniter 33.Spark plug carries out preheating, if mixing tube 24 inside have flame to take place, flame detecting sensor 45 is stopped action at this moment.Mixing tube 24 is the coil 36 of the 1st valve event being supplied with by the power supply of rectification in rectification circuit after flame takes place, and 36 driven whiles of coil are controlled to be open mode to valve.At this moment, the exhaust blower regular event applies actuating signal from microcomputer 100, and supply power is driven.It is the coil 39 of the 2nd valve event that voltage is supplied with, and coil 39 is subjected to the control of driving components and parts 48 controlled from microcomputer, drives components and parts 48 in driven driving that forms coil 39 simultaneously.Such the 1st valve and the 2nd valve all are controlled as open mode.
When two valves are controlled as open mode, for the DC power supply that drives the 3rd valve supplies to coil 42, while drive coil 42, at this moment, the voltage swing that supplies to coil 42 is by deciding at microcomputer-controlled pwm signal.The pwm signal that drives by the caloric value regulating winding 42 of regulating heater.
If 3 coils all are driven, 3 valves of series connection are opened, the coal gas that flow into product inside by gas pipe 23 supplies in the mixing tube 24 simultaneously.The flame coal gas that takes place because of igniter 33 in mixing tube 24 is continued to be supplied with, and heater produces heat energy, and the heat energy of generation is by hot-air channel feed roller 1 hot blast.
The action of microcomputer 100 by-pass valve controls, whether the existence of the outlet side flame of judgement mixing tube 24 to be, and this action is finished by Fig. 7.
Flame detecting sensor 45 is Yin Wendu and open/close switching device.Under the A-stage that heater is failure to actuate, do not have heat, keep duty, but under the state of heater action, be converted to closed condition.And, after heater stops to move, still have residual heat in hot-air channel 20 inside, thus keep closed condition between fixing time.
As shown in Figure 7, the action of flame detecting sensor 45 is sent in the microcomputer 100 by connector 46, the operating state that microcomputer 100 all the time can cognitive flame detecting sensor 45.
By top path, whether the existence of judgement flame in microcomputer 100, provides control coal gas to supply with the actuating signal of the valve that opens and closes according to judged result.The valve event signal of this moment is controlled with the driving vigour part 48 of coil shown in Figure 5 39.
As shown in Figure 6, the speed detecting element 300 that in exhaust blower motor 31, comprises the pairing frequency of the speed of detecting.Speed detecting element 300 uses photelectric receiver, can apply the pairing frequency of exhaust blower motor 31 rotary speeies.
The pairing frequency signal of rotary speed of the exhaust blower motor that detects in the speed detecting element 300 is input in frequency/transformer 310, and the voltage that the frequency inverted that is transfused in frequency/transformer 310 is is output.The pairing voltage of the rotary speed of exhaust blower motor is detected, frequency/transformer 310 detect voltage and a reference value of having set by comparator 320 compare judge the exhaust blower motor regular event whether.
The value that a reference value that comparator 320 sets can detect when being set at exhaust blower motor regular event.Generally speaking during exhaust blower motor regular event more than 300rpm.The motor that speed detecting element 300 is detected is judged as the exhaust blower motor when 300rpm is following be not normal operating state.
By the regular event whether judgment value of output exhaust blower motor in the comparator 320, come by-pass valve control to drive the components and parts coil.
As shown in Figure 6 with the PNP transistor TR1 of the perceptual signal of the regular event of exhaust blower motor and switch motion with also have the NPN transistor TR2 of the control action of microcomputer 100 connecting, between connecting the driving components and parts coil 36 of valve.2 switching component TR1, TR2 just supply with coil 36 electric currents, meanwhile valve opening and closing starting when doing.
Course of action to dryer of the present invention with said structure describes:
As shown in Figure 8, drop into the washings that to dry in the inside of cylinder 1.The user is closed to the doorstep and is selected oven dry actuating signal (the 500th step) in press key input section 103, and this signal is imported in the microcomputer 100.Microcomputer 100 drives signal at Rolling motor drive division 118 output motor exhausts, the drum belt rotation of driven while of Rolling motor, and then cylinder 1 is also along with rotation.
If exhaust blower 17 begins to drive, from the exhaust blower motor, detect and the corresponding frequency of rotary speed at speed detecting element 300.The frequency that is detected at speed detecting element 300 is the frequency transformation that is detected a corresponding voltage signal by frequency/transformer 310.During a reference value that the voltage signal that obtains has been set greater than comparator 320, comparator output low signal.The low signal of this moment is adjusted to transistor T R1 and rotates/open state, forms current channel at supply power Vdd on by transistorized coil 36 simultaneously.
If during a reference value that the voltage signal that obtains from frequency/transformer 310 sets less than comparator 320, the high signal of comparator 320 outputs.High signal maintained transistor T R1 and rotated/open state this moment, cut off the power channel of leading to coil.Comparator 320 is the speed of exhaust blower motor 31 when rising to certain speed, output drive signal, and the signal of heater-driven is cut off in output when certain speed is following.
During exhaust blower motor 17 driven, the signal that output transistor TR1 rotates/opens (the 520th step), but under this state, transistor T R2 is the state that closes, so coil 36 can not drive.
The exhaust blower motor is when driving, and microcomputer 100 is exported the signal of gas safety shearing device power supplys.The state that (the 530th step) is controlled as out according to this signal transistor TR2.At this moment, the power supply of supplying with the gas safety shearing device in the early stage under the state by the flame detecting sensor 45 feed point firearms 33 of the state kept out, igniter 33 is carried out the initial stage igniting action that produces flame at the outlet side of mixing tube 24.
Be connected two transistor T R1 of coil 36, TR2 all moves, and the voltage of gas safety shearing device is supplied with first valve that opens and closes valve 25, the action that first valve is opened.
In addition, the heat that takes place during because of igniter 33 actions, flame detecting sensor 45 is converted to the state of pass, and the action of flame detecting sensor 45 is provided to microcomputer 100 (the 540th step) by opto-electric connector 46.Microcomputer 100 confirms to have normal flame to produce along with the action of flame detecting sensor 45.
If the normal flame by the flame detecting sensor in the 540th step is detected, the actuating signal of second valve of microcomputer 100 outputs.This signal is applied to the transistor 48 in the gas safety shearing device.This moment, coil 39 was driven simultaneously, and at this moment coil 42 also is driven (the 550th stage) together along with the signal transistor 48 that applies moves.
At this moment, all coils all drive, and mixing tube 24 internal feed coal gas, heater are driven and produce oven dry action necessary energy (the 560th stage).
After, and this is to supply to cylinder 1 inside after also being attracted the air of coming in by the heater heating by the driving of exhaust blower 17, cylinder 1 internal feed is by the hot blast of the heating of heater heating.
As shown in Figure 8, if in certain judgement stage, when normal rotation, driving components and parts TR's exhaust blower motor of drive coil 36 usefulness is not failure to actuate, and the current channel of coil 36 does not form.Even other all actions are normal condition all, heater-driven can not be supplied with coal gas.
Same exhaust blower motor normally rotates, output winding 36 drives microcomputer with the operating state of the cognitive flame detecting sensor 45 of signal (driving TR2 signal) and is judged as fireless the time on the microcomputer, the driving components and parts 48 that coil 39 drives usefulness are failure to actuate, equally, can not form the current channel of coil 39.Even other everythings are regular event, do not detect flame, the driving of heater is supplied with and can not be carried out with coal gas.
The present invention detect exhaust blower 17 rotation rpm perception exhaust blower regular event whether.And whether the existence of the flame by the perception of flame detecting sensor.Value according to such perception is the basis, and the coal gas that control is being connected more than two is supplied with the operating state of valve, controls coal gas down with safe condition and supplies with.
The present invention is basic heater action with whether existing of the regular event of exhaust blower motor and flame, and control as basic technological thought, and in above technological thought scope of the present invention, can change various to people with the common technology of the industry.
Claims (3)
1. the gas safety shearing device of a dryer, described dryer is the inside that the air of heating is supplied to cylinder, the heating, drying washings, again the air in the swing roller is discharged to the outside, thereby dry, comprise the exhaust blower motor that produces the air be circulated in the cylinder and flow, toward cylinder internal feed hot blast add the hot-air heater, it is characterized in that also comprising the speed that detects exhaust blower, thus judgement regular event whether regular event decision means; The existence whether flame that detects the action formation flame of heater detects parts; Be subjected to regular event decision means and flame to detect the control of parts, thereby give the heating fuel driver part of supplying with heating fuel in the heater and driving.
2. the gas safety shearing device of dryer according to claim 1 is characterized in that the heating fuel driver part is that valve with series connection more than two constitutes, and regular event decision means and flame detect parts and controls in the plural valve each one respectively.
3. the gas safety cutting-off method of a dryer produces exhaust blower motor that the air that is circulated on the cylinder flows and in order to add the hot-air heater toward cylinder internal feed hot blast, it is characterized in that comprising with the next stage for possessing:
A, oven dry action beginning, the revolving process of rotation exhaust blower;
Whether b, the rotary speed of judging exhaust blower reach the above judgement stage of certain speed;
C, detect the stage that detects that whether has flame along with the driving of heater;
D, the signal that detects based on the signal of judging the stage and the stage that detects, the driving of control heater, the coal gas supply stage that fuel gas is supplied with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021581479A CN100383333C (en) | 2002-12-25 | 2002-12-25 | Safety gas shut-off device of drier and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021581479A CN100383333C (en) | 2002-12-25 | 2002-12-25 | Safety gas shut-off device of drier and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1510204A CN1510204A (en) | 2004-07-07 |
| CN100383333C true CN100383333C (en) | 2008-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021581479A Expired - Fee Related CN100383333C (en) | 2002-12-25 | 2002-12-25 | Safety gas shut-off device of drier and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2305878B1 (en) * | 2008-05-06 | 2017-09-20 | Daewoo Electronics Corporation | Control method for a gas-type clothes dryer |
| KR102378474B1 (en) * | 2017-08-09 | 2022-03-25 | 엘지전자 주식회사 | Laundry Treating Apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10305191A (en) * | 1997-03-04 | 1998-11-17 | Sekisui Chem Co Ltd | Control method for bathroom ventilating drier |
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2002
- 2002-12-25 CN CNB021581479A patent/CN100383333C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10305191A (en) * | 1997-03-04 | 1998-11-17 | Sekisui Chem Co Ltd | Control method for bathroom ventilating drier |
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| CN1510204A (en) | 2004-07-07 |
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