CN1124802A

CN1124802A - Clothes dryor

Info

Publication number: CN1124802A
Application number: CN95109587A
Authority: CN
Inventors: 勝沼彦
Original assignee: Toshiba Corp
Current assignee: Toshiba Corp
Priority date: 1994-10-14
Filing date: 1995-10-16
Publication date: 1996-06-19
Anticipated expiration: 2015-10-16
Also published as: KR960014518A; CN1077178C; KR0147928B1; JPH08112496A; TW284807B

Abstract

The invention discloses a clothes drier with a working process as follows: when the load current of a PTC dryer in the process of drying reduces below the preset base value (S5), a microcomputer can inform the cleaning period (S7) of a filter through twinkling of a signal lamp and a buzzer; when drying process stops or a door is opened (S20), the buzzer of a microcomputer gives alarm (S33); in the process of drying, when the door is in a close state, or the door is opened in the process of software keeping working (S26) or the door is in the state of not being opened in the process of a software keeping working or the door is opened after the process of software keeping working (S29), the buzzer gives alarm. The novel clothes drier can accurately inform users of the cleaning period of the filter which is used for collecting rag dust.

Description

Clothes drier

The present invention relates to have the clothes drier that can capture by the filter that can freely load and unload that is housed in the cloth bits (cloth suede) that thing produced that are dried in the dryer drums.

Clothes drier in the past also is provided with the cloth bits that can will be housed in the deposits yields that is dried in the dryer drums and captures and detachable filter when carrying out drying operation.But in the time of on the cloth of volume is considered to be worth doing attached to filter, filter screen is blocked, and fan resistance increases, and causes the reduction of blower fan air output, drying efficiency to descend thereupon, and the user must take out filter after appropriate time in drying machine, clean.

User oneself handles but way in the past is with the cleaning period of filter, thereby the thing that surpasses suitable cleaning period often has generation, at this moment, often cause the filter filter screen being blocked and carry out dry operating in the same old way, for this reason, because of drying efficiency descends significantly, must prolong dry running time so have, thus the shortcoming of consuming a large amount of electric power.

In view of afore-mentioned, the object of the present invention is to provide a kind of have to capture be contained in cloth that clothing the produced bits that are dried in the dryer drums, and with the clothes drier of optimum cycle scavenge filter.

Comprise in the clothes drier of the present invention: on the dryer drums, put into and take out be dried the door that can open that clothing uses, have the heater of forward temperature resistance characteristic, the filter of assembling to the fan of rotary drum air-supply, with fan by this heater that freely is being provided with in the loading and unloading of air-supply path, the aforementioned rotary drum control device that dry operation is controlled by to aforementioned heater and fan power supply the time during in revolution.

Also be provided with the open detection means, the load current detection means that detects the load current of aforementioned heater that detect aforementioned door opening, report aforementioned filter whether be in the cleaning means of notifying in period, under aforementioned control device management, the heater loads electric current that is recorded by the load detection means when carrying out dry operation is that predefined a reference value when following, aforementioned in the period of setting of notifying " door is opened " detection means record door and be the state of opening order the to notify control device of notifying of means action.

About aforementioned formation, the signal of its setting time limit of notifying can be after the dry rundown of control device control; Also can be among the drying operation is carried out.

In addition, the time limit of notifying of setting can be before clothes drier bulk supply state is finished; Value that drying operation that power supply time-delay means make control device control records by the load current detection means when the load current of heater also can be set when a reference value that sets is following, can fix on the dry end of run of aforementioned control device under controlling to clothes drier bulk supply and prolong certain hour later on.

In addition, the time limit of notifying of setting can be when clothes drier bulk supply state is finished till; Power supply time-delay means also can be set, make control device when dry rundown, carry out soft maintenance, promptly keep running at the state of the fan air-supply rotary drum of ordering, further can also when being low, after ending, soft hold mode prolong the power supply of certain hour maintenance with control device by the dry operating load current value of load current detection means detection heater to clothes drier integral body with aforementioned control device than predefined a reference value.

The time limit of notifying that sets can be when clothes drier bulk supply state is finished till; Power supply time-delay means also can be set, make control device measure the load current of heater by the load current detection means, begin till the time of setting maintenance from the drying operation to the power supply of clothes drier integral body when making with aforementioned control device when low than predefined a reference value at dry run duration.

Be provided with and detect the be dried thing amount detection means of dryer drums, and the means of notifying can be set a reference value corresponding to the inventory that is dried that detects with the aforementioned thing amount detection means that is dried by the thing amount that is dried of accommodating.

More than the system of Zu Chenging can set its a reference value by exporting corresponding to the quota of be dried inventory and the heater that detect with the aforementioned thing amount detection means that is dried with the control device of notifying.

In addition, also be provided with the room temperature detection means detecting room temperature, the room temperature that the control device of notifying can be recorded by the room temperature detection means and the difference of the fiducial temperature of setting are carried out revisal for basic for its a reference value.

Control device is carried out the drying operation according to the charged drying machine of controlling of rotary drum heater and fan under rotation status, therefore and constituted air-supply loop by the hot blast of rotary drum, thereby make the thing drying that is dried that is contained in the rotary drum, at this moment consider to be worth doing by the filter traps of being located in the ventilation circuit by the clothing of the deposits yields that is dried, but when filter is that many cloth bits are when adhering to, the flowing resistance of filter just increases, ventilation reduces thereupon, the intensity of heater rises, at this moment the forward temperature of heater resistance characteristic makes the rising along with temperature, resistance also just increases, the load current of heater diminishes, thereby has suppressed the rising of caloric value.

Here, the control device of notifying be when a reference value that the prediction of the dry heater loads circuit values that is recorded by the load detection means in service is set is following and setting notify during the control device order means action of notifying when measuring " door is opened " information by door open detection means, in view of the above, can positively notify to the user " filter cleans ", allow the user be convenient to set filter and carry out cleaning with optimal period.

Because the phase of notifying that control device will be set fixes on after the dry end of run, thereby the control device of notifying is opened " door is opened " signal that detection means records when dry end of run back door, the order means of notifying are moved, in view of the above, can positively notify to the user " filter cleans ", allow the user be convenient to set filter and carry out cleaning works, therefore can make the function of filter move with the drying that the state of regenerating carries out next time with optimal period.

Because the phase of notifying that control device will be set fixes in the dry running, so when dry running, the control device of notifying is opened " door is opened " signal that detection means records according to door, the order means of notifying are moved, in view of the above, can positively notify to the user " filter cleans ", allow the user be convenient to set filter and carry out cleaning works, therefore can make the function of filter move with the drying that the state of regenerating carries out again with optimal period.

With the phase of setting of notifying fix on clothes drier bulk supply state finished before, thereby the control device of notifying when door is opened detection means and detected start signal, made the means action of notifying before clothes dry face bulk supply state is finished.

Here, in the dry running of controlled means control as when being subjected to the load current value of the heater that the load current detection means records to be lower than predefined a reference value, the terminal point that power supply time-delay means will be moved from drying the power supply of clothes drier integral body extends to the time that sets, in view of the above, even under the situation of dry end of run, the action of means owing to notify, not only can notify " filter is in cleaning " for the user definitely, and can stop clothes drier integral body is done meaningless power supply not opening under the situation that door inspects.

With the phase of setting of notifying fix on clothes drier bulk supply state finished before, thereby notified control device before clothes drier bulk supply state is finished, when door is opened detection means and detected start signal, make the means action of notifying.

Here, in the dry running of controlled means control, as the load current value that is subjected to the heater that the load current detection means records is when being lower than predefined a reference value, the terminal point that power supply time-delay means will be moved from drying the power supply of clothes drier integral body extends to the time that sets, in view of the above, even under the situation of soft maintenance operation, the action of means owing to notify, not only can notify " filter is in cleaning " for the user definitely, and can under the situation of inspecting of not opening the door, stop clothes drier integral body is done meaningless power supply.

Because the control device of therefore notifying before the signal phase that will set fixes on drying machine bulk supply finished was opened detection means for door and is recorded door and open information before drying machine bulk supply is finished, even signal means moves.

Here, in the dry running of controlled means control, as the load current value that is subjected to the heater that the load current detection means records is when being lower than predefined a reference value, till being about to clothes drier bulk supply begun to extend to the time that sets from operation for electric time-delay means, in view of the above, even when the drying machine end of run, because the means of notifying, not only can be given the user definitely notify " filter is in cleaning " in work; And can stop clothes drier integral body is done meaningless power supply not opening under the situation of inspecting.

The thing amount that is dried detection means detects the thing amount that is dried of taking in the rotary drum, and, the control device of notifying is owing to the thing amount that is dried that records corresponding to the thing amount detection means that is dried, set its a reference value with the heating load current value ratio, therefore the influence of the flowing resistance difference that can be caused regardless of the thing amount that is dried, by the work of the means of notifying, still can definitely notify " filter is in cleaning " to the user.

The heater of the control device of notifying thing amount that is dried that thing amount detection means records according to being dried and the control of controlled means, its specified output corresponding load current value comparison and set its a reference value under switching state, therefore the flowing resistance difference that the thing amount that is dried causes obtains revisal and can pay no attention to its influence to the specified output of heater, and the user can know whether filter was in the cleaning phase according to the work of the means of notifying.

The control device of notifying is carried out revisal according to the difference that a reference value comparison of the room temperature that is recorded by the room temperature detection means and setting gets to a reference value of setting, although therefore cause the change of heater loads electric current because room temperature changes, the means of notifying are not influenced by it, whether are in cleaning period to user's filter of notifying definitely.

From above stated specification as can be known, clothes drier of the present invention has following effect:

In service in drying, the heater loads current value with resistance characteristic just warm in nature is predefined a reference value when following, set notify during as door be opened and then will definitely notify " the cleaning phase that is filter " to user person.Can positively notify " the cleaning phase that is filter " to the user.Therefore, as long as the user is to the suitable timing of filter, and cleaning just can be finished.

After the phase of setting of notifying is located at dry rundown, therefore after dry rundown, " the cleaning phase that is filter " this information of just can definitely notifying to the user, thereby the user is as long as suitable regularly cleaning works just can be finished to filter, therefore, just can under the state of filter function regeneration, carry out the drying operation of next round.

The phase of setting of notifying is located at dry in service, therefore, " the cleaning phase of filter " this information of in dry operating, can definitely notifying to the user, thereby, the user is as long as suitable regularly cleaning works just can be finished to filter, therefore, just can under the state of filter function regeneration, carry out the drying operation again.

The phase of setting of notifying is located at before the power supply state end of clothes drier, simultaneously, low to predefined a reference value when following in the drying load current value as drying machine in service, the power supply all to clothes drier extends to through till the time of setting from the dry end of run, therefore, although dry operation finishes, " the cleaning phase that is filter " this information of not only still definitely notifying to the user, and under the situation that unforeseeable door is opened, can stop all doing meaningless and power supply waste to clothes drier.

The phase of setting of notifying is located at before the stopping to electricity condition of clothes drier, simultaneously, the load current value of drying heater in service low to predefined a reference value when following to clothes dryer till all power supplies extend to the time of setting from the soft maintenance end of run, therefore, although soft maintenance operation finishes, " being the filter cleaning phase " this information of not only still definitely notifying to the user, and under the situation that unforeseeable door is opened, can stop all doing meaningless and power supply waste to clothes drier.

The phase of setting of notifying is located at before the power supply state end of clothes drier, simultaneously, low to predefined a reference value when following in the load current value of drying heater in service, the power supply all to clothes drier extends to through till the time of setting when the drying operation begins, although therefore dry operation stops, " the cleaning phase that is filter " this information of not only still definitely notifying to the user, and under the situation that unforeseeable door is opened, can stop all doing meaningless and power supply waste to clothes drier.

Set the datum quantity of comparing by the thing amount that is dried that dryer drums is accommodated with the load current of drier, therefore can not be subjected to because the influence of the fan resistance difference that the thing amount that is dried causes, still can be to the user who opens door " the cleaning phase that is filter " this information of notifying definitely.

The thing amount that is dried of accommodating by dryer drums, set load current value a reference value relatively with drier, therefore, the flowing resistance that causes with the thing amount that is dried is poor in addition, can not be subjected to the influence of the standard output state of heater, to user's " the cleaning phase that is filter " this information of notifying definitely of opening door.

The difference of room temperature and fiducial temperature be the basis with the load current value a reference value revisal relatively of heater, therefore,, be not subjected to the influence of this change although the load current value that causes heater owing to room temperature changes to some extent; Still can be to user's " the cleaning phase that is filter " this information of definitely notifying of opening door.

Fig. 1 is the sketch of the electrical structure of expression first embodiment of the invention;

Fig. 2 is the disconnected side view in the whole footpath of expression;

Fig. 3 is an expression operation board front view;

Fig. 4 is the flow chart of the miniature calculating control action of expression;

Fig. 5 is the be dried figure of corresponding relation of the power of thing amount and heater and a reference value of expression;

Fig. 6 is the figure that is equivalent to Fig. 1 of expression second embodiment of the invention;

Fig. 7 is the figure that expression is equivalent to Fig. 2;

Fig. 8 is the flow chart of an expression microcomputer control action part;

Fig. 9 is the flow chart that expression the present invention has a microcomputer control action part among the 3rd embodiment;

Figure 10 is the flow chart of a microcomputer control action part in the expression fourth embodiment of the invention.

Embodiment one

Below, the first embodiment of the present invention is described with reference to Fig. 1-Fig. 5.

Fig. 2 is the radial cross-section of the overall summary structure of expression drying machine, in Fig. 2, outer container 1 central authorities of plate in front is provided with the gateway 2 of the clothing that is dried, this gateway is provided with door 3, be provided with drying drum 4 in the outer container 1, pass its behind central part and stretch out rotating shaft 5, its other end is bearing on the supporting plate 6 of being located at the back side, outer container 1 back and axle can be rotated, periphery at the heavy caliber opening of cylinder front panel has garden tubular flange 7, it is supported on the rotary drum supporting member 8 that is fixed on the outer container 1 interior header board, and make it can freely rotate, like this rotary drum 4 of Gou Chenging just can by be arranged at outer container 1 internal upper part can forward and reverse rotation motor 9 rotate by belt gear 10 drivings.

The hot air supply device 11 that send hot blast in dryer drums 4 is the blow vents 12 that had many apertures by plate central portion behind rotary drum, the fan coverboard 13 that links to each other of blow vent therewith, two airfoil fans 14 of two ones and the double as dehumidifying usefulness that disposing with 5 one-tenth gardens of above-mentioned rotating shaft axle shape before and after the inside of this blower-casting is separated into, the air channel 15 that below rotary drum 4, sets with connected state with the front portion of fanning shell 13, be installed in two garden column heater-

ptc heater

16a and 16b (Fig. 2 only represents a ptc heater 16a) in the rotary drum supporting 8 of the downstream side (front side) that is arranged in this air channel 15, the hot air blow port 17 of opening many apertures and form on the rotary drum supporting plate, the institutes such as belt gear 18 that transmit the revolving force of aforementioned electric motivation 9 for fan 14 constitute.

Here, as on the blow vent 12 of hot air supply device 11, it being covered from rotary drum inside and loading and unloading freely disposing fan 19, in addition, on the peristome at the back side of outer container shell 1, disposing as this peristome being blocked backboard 20 just like that, central portion at this backboard 20 is provided with the extraneous air suction inlet 21 that has many apertures, and has extraneous air return-air mouth 22 of blind window shape etc. in the bottom of backboard.

Bottom at rotary drum supporting plate 8, towards rotary drum inside pair of electrodes 23 is installed, interpolar keeps certain insulation spacing, rotation along with rotary drum 4, be dried thing and this electrode pair is in contact with one another, contact each time, the resistance that two electrodes are 23 just be than usual low change in resistance once, at this moment, the changes in resistance amount that electroplax is 23 is few more with moisture in the thing that is dried that is contacted, in other words, aridity with the thing that is dried is high more and more little, because this characteristic, by measuring this interelectrode resistance variations, the aridity of the thing that is dried in the rotary drum just can detect.

Temperature-sensing element (device) 24 is housed on the coverboard 13, to measure the air themperature that flows out by ventilating opening in the rotary drum 4, it is the rotary drum internal temperature, in addition, top in outer case 1 is being provided with the electronic panel 26 that electronic component is installed, and forms the following control device 25 (referring to Fig. 1) and the peripheral circuit thereof that are used for dry operation control.

Top in outer case 1, with also be provided with rotating speed detecting element 27 on the motor 9 corresponding positions, these rotating speed detecting element 27 structures have: the magnetic 27a (rotating shaft of 18a and motor 9 is directly connecting) of belt pulley 18a that is installed in the motor of belt drive unit 18, the magnetic detection element 27b that is installed with on the position with respect to the rotary motion trace of aforementioned magnetic 27a on frame 9a side in the supporting of motor 9, the waveform of the output signal of this magnetic detection element 27b is carried out shaping send signal processing circuit 27c of pulse signal etc., in addition, turn-sensitive device 27 also can adopt light-sensitive element.

Fig. 3 is the operation panel of installing on the front panel of expression outer case 1, and in Fig. 3, the bottom of operation panel 28 is set as operating portion 28a, is provided with among this operating portion 28a: power switch 29, mode change-over switch 30, heater change-over switch 31 etc.; Being designed to delimit on the top of operation panel 28 is display part 28b, in this display part, be equiped with: start/pause switch 32, " in the drying " signal lamp 33 that shows dry running status, " work " displaing lamp 34, " the dry end of a period " displaing lamp 35 and soft maintenance displaing lamp 36, be used as " in the filter cleaning " signal lamp 37 that the filter 19 of notifying is in the means of notifying of cleaning phase in addition, in addition, also be equiped with among the display part 28b: the standard mode indicator lamp 38 of the method for operation that mode change-over switch 30 is set, the indicator lamp 39 of representing trickle working method, blanket mode indicator lamp 40 and accurate mode indicator lamp 41, the indicator lamp 42 of the reflection heating intensity that also with good grounds heater change-over switch is set.

Among Fig. 1, with functional block combined method summary table control circuit means 25 are shown and reach the electrical structure of relevant portion with it, below be explained.

Control circuit means 25 are to be called the notify microcomputer 43 of means, power supply time-delay means and the functions such as thing amount detection means that are dried of control device, signal in the present invention and to constitute for main body by having, the power supply of this microcomputer 43 is provided through power switch 29 and rectification 45 by AC power 44, and pair microcomputer 43 that has that does not show in the drawings in addition provides the power supply of the clock circuit 46 of clock pulses, power supply of the testing circuit 47 that is connected with electrode 23 etc. to provide by rectification circuit 45.

Testing circuit 47 with the resistance value of pair of electrodes 23 (signal of telecommunication of promptly representing the thing aridity that is dried in the rotary drum 4) convert voltage signal to, this voltage signal is sent into microcomputer 43 as aridity signal SK.In addition, detecting circuit 47 has the activation signal of the situation that produces the thing contact electrode 23 that is dried, this activation signal S _sAlso can send into microcomputer 43.

As for motor 9,

ptc heater

16a, 16b as the buzzer 48 of the means of notifying and filter cleaning indicator lamp 37 etc. by AC power 44 by power switch 29 power supplies, in these power supply circuits particularly to ptc heater 16a, be provided with current transformer 49 in the power supply circuits of 16b, this current transformer 49 can be along with ptc heater 16a, the load current of 16b produces electric current, therefore it is being connected with the current value testing circuit 50 that constitutes the load current detection means together with current transformer 49, and also is admitted to microcomputer 43 by the current value detection signal Sd that the current value testing circuit records.

Microcomputer 43 is accepted clock pulse signal, aridity signal SK, activation signal S _sAnd current value detection signal S _aAlso accept to start the detection signal that a pause switch 32, mode change-over switch 30 and heating change-over switch 31 are sent in addition.The pulse signal that temperature signal that Temperature Detector 24 is sent and revolution detector 27 are sent, on the basis of these input signals and the control program set up in advance, connect drive circuit 51, the latter is controlling the break-make of filter cleaning signal lamp 37, buzzer 48, motor 9,

ptc heater

16a, 16b, at this moment, keep the main relay that does not show among the figure in drive circuit 51, this main relay also is an off state to clothes drier bulk supply when off state.

In addition, whether microcomputer 43 is also accepted the signal input that door switch 52 that detecting gate 3 opens is sent, according to this detection signal, can detect door 3 and open.

Fig. 4 is the content that expression is controlled by microcomputer 43, below this and associated effect is described.

Operating power switch 29 makes electric current input operation startup-pause switch, enabling signal input, microcomputer 43 are connected the main relay of drive circuit 51, thereby make clothes drier integral body be in power supply state, motor 9 energisings, make the dryer drums rotation, increase (step S with advancing

ptc heater

16a, 16b energising, set the quota output that makes heater integral body ₁).

So rotary drum 4 and fan 14 rotate, with the common vent passages of forming of fan, shown in arrow A among Fig. 2, the wind that produces by fan 12 from 13 beginnings of fan cabinet through airduct 15 after

ptc heater

16a, 16b become hot blast and supply with rotary drum 4, simultaneously, form and rise, get back to a such air circulation loop of fan cabinet through filter 19 and ventilating opening 12 by this rotary drum, rely on the effect of this circulating air, the drying operation of the thing that is dried in the rotary drum 4 is carried out.In addition, shown in arrow B among Fig. 2, outside than after cold air is in the extraneous air suction inlet 21 suction fan cabinets 13, formed again and returned outlet from extraneous air and send air flow circuit outside the machine back to, rely on this ventilating air, make fan 14 coolings, the result, the moisture condensation and dewfall on the front panel of fan 14 of (in the hot blast) in the air of aforementioned air loop of flowing through, thus make damp steams in the rotary drum 4 get back to the state of water and be removed such one and remove water running and go on from the thing that is dried.Simultaneously such as described above, be accommodated in cloth bits that produce by the clothing that is dried in the rotary drum and so on after the air circuit by rotary drum 4 inside forms and in by filter, be captured.

Then, microcomputer 43 reads in strong and weak degree (the step S of

ptc heater

16a, 16b that electric heater change-over switch 31 is set ₂) promptly when

ptc heater

16a, 16b switch on, be judged to be by force, a little less than only

ptc heater

16a, 16b energising the time is judged to be.

So microcomputer 43 is with activation signal S _sNumber of signals n be set at zero, (step S ₃) the activation signal S that testing circuit sent here in per then two minutes _sNumber of signals counting (step S once ₄, S ₅), at this moment, whether activation signal of the per 5.9 milliseconds of differentiations of the counting of this number of signals is sent here, as signal send here, the counting of number of signals just increases, by this, the differentiation as per two minutes do once, so just can judge is having how many times to receive activation signal S in 20340 times the differentiation altogether _sInput.

Here, the number of signals n value that per differentiation of being done in two minutes obtains that is to say that with being dried the thing amount more greatly and the more number of signals n is characterizing the contact frequency of clothing on electrode 23 that be dried, and obtains this number of signals n, just may detect the amount of the thing that is dried.

Then, microcomputer 43 according to aforementioned examine signal n set reference current value I _a(step S ₆), and whether below reference current value, just can judge feelings (the step S whether filter 19 mesh has taken place to stop up according to the load current value I of

ptc heater

16a, 16b ₇), that is to say, be dried as filter 19 and form that the filter screen eye stops up, the flowing resistance of filter 19 is just big morely when clothing that clothing produced bits adhere to, air output to

ptc heater

16a, 16b reduces, temperature rising, the load current of

ptc heater

16a, 16b just reduce thereupon, as load current I falling-rising reference current value I _aWhen following, just can examine and determine filter 19 filter screen eyes in view of the above and stop up.

Here, reference current I _aBe as shown in Figure 5, according to the strong and weak of

ptc heater

16a, 16b and be dried the thing amount and operation conditions selection reference current value I that is set in advance, also can be at that time _a, at this moment reference current value I _aBe set at and the strong and weak of

PCT heater

16a, 16b and the not value accordingly of thing amount that is dried, this is because also different to the air output of

ptc heater

16a, 16b according to various state, its load current value I earthquake, so in order not to be subjected to the influence of these factors, the cause that filter mesh stopping state can definitely be judged, in addition, Fig. 5 is the reference current value I of expression _aExample when 20 ℃ of room temperatures.

When the obstruction of filter screen order does not take place in filter 19, the flowing resistance of filter 19 is very little, the air-supply air quantity that is come by blower fan is bigger, so the resistance of

ptc heater

16a, 16b is corresponding to air output and to settle out than being generally low resistance, i.e. the load current value I of

ptc heater

16a, 16b _aThan reference current value is big.

Here, microcomputer 43 is worked as the load current value I of

ptc heater

16a, 16b than reference current value I _aWhen big (among the step S7 " NO "), can judge that this moment, filter filter screen order was not blocked, can allow dry operation continue, when detecting drying when finishing, also stop dry operation (step S9, S10) after the processing operation, at this moment, as the user just near the clothes drier time, usually the user moves to have ended according to drying and just can open door 3 immediately, takes out the thing that is dried that is collected in the rotary drum 4.

Here, microcomputer 43 is worked as drying and is run abort, and (step S11 " YES ") and judgement were dried and just turn-off the main relay of drive circuit 51 after thing has been removed when door 3 was opened, thus the whole power failure of clothes drier (step S16).

On the other hand, if the user does not take drying into account and runs abort under the situation nearby of clothes drying during dry end of run, will not be housed in clothing in the rotary drum and take out and let alone and place, the thing that then is dried will leave fine wrinkle when bone dry.

Here, microcomputer 43 is when dry end of run and door 3 when not being opened (step S11 " NO "), will make the judgement of " user is not nearby ", in order not make the clothes that is dried produce the operation (step S12) that fold just changes soft maintenance over to, this soft maintenance operation is exactly to rotate rotary drum 4 and rotate fan 14 with certain hour (in for example per 5 minutes per 10 seconds) in each setting-up time, microcomputer 43 allows so soft maintenance move certain hour (for example 2 hours) (step 14), (step 15) allows the main relay of drive circuit 15 close after soft maintenance operation is finished, like this, whole have a power failure (step 16) of clothes drier.

In addition, in soft maintenance process, when door 3 is opened (step S13 " YES "), microcomputer will be made the judgement of " clothing that is dried is removed " and be turn-offed the main relay of drive circuit 51, thereby makes whole have a power failure (the step S16) of clothes drier.

Moreover, along with aforementioned dry operation, many clothing are considered to be worth doing attached on the filter 19, the flowing resistance of filter 19 increases, to the air-supply air quantity reduction of

ptc heater

16a, 16b, the resistance of

ptc heater

16a, 16b increases, and final load current value I is reduced to reference current value I _aBelow.

Here, the load current value I as drying ptc heater 16a in service, 16b is reduced to reference value I _a(step S7 " YES ") microcomputer 43 is made the judgement of " obstruction of filter 19 filter screen eyes " when following, makes the filter cleaning signal lamp light a lamp.Flicker is given out light, buzzer action (step S17) simultaneously was through kind buzzer release (step S18, S19) later in 6 seconds, in view of the above, because the sound equipment that sends of buzzer arouses user's attention, and the flicker of seeing the filter cleaning indicator lamp recognize filter cleaning interim and filter 19 now in cleaning.

Here, although want the energising of buzzer 48 among the step S19 is stopped, microcomputer still allows the blink states of filter cleaning indicator lamp 37 continue, therefore, even the user does not hear the chimes of doom that buzzer sends, the flicker of being sent by the filter cleaning indicator lamp still continues to notify: interim when filter 19 still is in cleaning, but as previously mentioned, when filter filter screen order takes place to stop up, the buzzer 48 singing devices filter cleaning indicator lamp 37 flickers simultaneously filter 19 of notifying is cleaning interim, but the user is not nearby the time, just have only 37 flickers of filter cleaning indicator lamp, continue representing filter 19 interim this part thing when cleaning, for this reason, the user is for the dry condition of the thing of confirming to be dried, or door 3 is opened in the dry operation of temporary transient interruption, or allow dry rundown, taking-up is dried thing and when opening door but the user flicker of signal lamp 37 not to be noted at 3 o'clock, wave filter 19 does not just clean, with regard to the former state state down or carry out dry operation again or carry out the drying operation of next round, so it is dry in service that microcomputer 43 just fixes on the phase of setting of notifying, at a close pause switch 32 or open 3 of this dry in service as user, (step S20 " YES ") can judge that user's buzzer singing on the scene notes to arouse the user when door switch 52 is closed, stop simultaneously motor 9 and ptc heater 16a, the energising of 16b (step S33), buzzer carries out singing in 6 seconds (step 34 then, S35).Therefore, the user who suspends dry operation or open door 3 is by the flicker of noticing filter cleaning indicator lamp 37 by buzzer 48 acoustic signals, and confirming is cleaning phase of filter 19 can carry out the cleaning of filter 19.Then, microcomputer 43 according to starting/pause switch 32 at closure state or door 3 at blocking, (step S36) can declare and know that filter is at the cleaning state and adorning clothing when door switch 52 cut-offs, extinguish the cleaning indicator lamp, simultaneously to motor 9 and ptc heater 16a, 16b energising, so again, carry out drying operation (step S37), program changes step 57 over to then.

Say again, when microcomputer 43 detect drying operation be not interrupted and door 3 situations that are not opened under, drying is finished (step S21 " YES ") and just stop dry moving (step S22, S23) after being processed operation.

In addition, during dry operation, the user is not often interrupted dry operation, does not open door at 3 o'clock yet, though can not be " being the filter cleaning phase " this part thing user that definitely notifies, the user opens door 3 and takes out the clothing that is dried again when drying runs abort.

Like this, microcomputer 43 is opened when the drying door 3 that is through with, and (step S24 " YES ") made user's judgement on the scene when door switch 53 was closed, just sounded with buzzer and aroused operator's attention.

Therefore, open the sound that the user of door 3 sent by buzzer during dry end of run and notice the blink states of filter cleaning indicator lamp, and recognize that therefore filter is in cleaning period, filter 19 in cleaning.

And, microcomputer 43 at buzzer 48 sounds after 6 seconds kinds (step S39), filter cleaning indicator lamp 37 extinguishes (step S40) when the sound of buzzer 48 stops, and the main relay of drive circuit 51 turn-offs, thus whole have a power failure (step 41) of clothes drier.

On the other hand, the user is not under near at hand the occasion when dry end of run, no matter dry operation has come to an end, because door 3 is not opened, microcomputer this dry operation is stopped and door 3 occasions that are not opened (step S24 " NO ") in order not make the deposits yields fold that is dried, just change soft maintenance operation (step S25) over to.

In the process of this soft maintenance, the user opens door 3 in order to take out the clothing that is dried sometimes.

Here, it is in service that the phase of notifying that the microcomputer order is set is placed on dry postrun soft maintenance, in service in this soft maintenance, (step S26 " YES ") makes the judgement of " user is on the scene " under the situation that door 3 is opened, change step S38 over to, thereby the sound that buzzer 48 is sent arouses user's attention.

On the other hand, microcomputer 43 makes soft maintenance operate in when move by preset time under door 3 situations about not opening (step S27) and finishes soft maintenance and move.

But, though to make whole power failure of clothes drier be common thing owing to the main relay of drive circuit 51 is turn-offed when soft maintenance runs abort, but as constant like this, then can not make the user recognize that this is that the anxiety of bringing fault to later drying operation is arranged cleaning phase of filter 19.

Just be taken into account in this case: still keep power supply later at soft maintenance end of run, thereby door 3 is opened, like this, it is the cleaning period of filter 19 now that the sound that is sent by buzzer will make the user notify, and not only does the danger that the electric power of being consumed becomes has also increased misoperation beyond the waste like that but clothes drier is unrestrictedly continued power supply state.

Here, the load current value I of microcomputer 43

ptc heater

16a, 16b in dry running drops to reference current value I _aWhen following, did in 7 hours after the words of the cleaning of filter 19 not being notified period can extend to dry rundown cutting off the electricity supply in service as the maintenance dry in service and soft of the phase of setting of notifying, the signal phase is prolonged, in this extended period, (step S29 " YES ") just changes step S38 under door 3 situations about opening, can make user's judgement at the scene in view of the above, send sound equipment, arouse user's attention by buzzer 48.

Then, microcomputer 43 is not opened at door 3, moved 7 hours (step S30) again behind the dry end of run, just make the judgement of " user not can't see filter 19 at the scene and cleaned ", and extinguish filter cleaning indicator lamp (step S31), final cutting power supply (S32).

By as can be known aforementioned: the load current value that microcomputer 43 is worked as dry ptc heater 16a in service, 16b is lower than reference current value I _aThe time judge whether the strainer screen order stops up, with seasonal buzzer 48 and the action of filter cleaning indicator lamp, in view of the above with information the notify user of filter in the cleaning phase, in dry running as the signal phase, when door 3 is opened, make buzzer 48 actions notify filter 19 on the occasion of the cleaning phase, therefore, the user who opens door 3 reminds according to the audible signal that buzzer sends, notice the flicker of filter cleaning signal lamp 37, therefore the judgement in filter cleaning period was depended on user's judgement unlike former product, the user only need confirm cleaning phase of filter 19 and filter 19 is suitably regularly just passable to clean.

In addition, whether microcomputer also judges in the cleaning phase filter when drying is moved 19, as in the dry running of the phase of notifying the door 3 situations about not being opened under with behind the dry end of run as the phase of notifying, under the situation about being opened at dry end of run back door 3, action by buzzer, notifying is this information of cleaning phase of filter, therefore, although be after dry end of run, can " being the cleaning phase of filter 19 " this information definitely inform the user who opens door 3.

At this moment, microcomputer 43 behind dry end of run owing to prolonged setting-up time just with dump, thereby prolonged the time of notifying, so although dry operation finishes, still can be definitely to the user who opens door 3 " the cleaning phase that is filter " this information of notifying, simultaneously, also can stop to carry out invalid power supply under 3 situations about being opened can not predicting door, also have, because to ptc heater 16a, the intensity of the standard of 16b output, or based on the PTC heating 16a of the thing amount that is dried of throwing in rotary drum, the load current I of 16b and with the reference current value I that makes comparisons _aDone suitable setting, thus can not be subjected to the power of ptc heater 16a, the output of 16b standard, or drop into the influence of the thing amount that is dried of rotary drum, " the cleaning phase that is filter 19 " this information of still notifying definitely.Embodiment two

Fig. 6 is to Figure 8 shows that the second embodiment of the present invention, the part identical with Fig. 1 and same steps as is all attached omits its explanation with identical symbol among the figure.Second embodiment is with the different of first embodiment: be provided with temperature-sensing element with detection room temperature (referring to Fig. 7) on the extraneous air suction inlet 21 of clothes drier, and the temperature that temperature element 53 records is imported microcomputer 43 (referring to Fig. 6).

At this moment, microcomputer according to the measured temperature (being room temperature) of temperature element 53 to reference current value I _aCarry out revisal (step T among Fig. 8 ₁And T ₂) promptly be characteristic as

ptc heater

16a, 16b, environment temperature is for example when 20 ℃ of fiducial temperatures change 1 ℃, therefore load current value I changes 0.05A/ ℃ than the load current value I under the fiducial temperature, can make owing to room temperature changes the ineffective treatment that influences of load current value I is come reference current value I by this _aCarry out revisal.

With regard to the second practical example, on the room temperature basis, pass through to set reference current value I _aWith the influence of payment room temperature, therefore can be at load current value I and the reference current value I of

ptc heater

16a, 16b _aOn the basis of comparing the cleaning of filter 19 is definitely reported period.Embodiment three

Fig. 9 is the flow chart of explanation third embodiment of the invention, to Fig. 1 in identical step is attached omits its explanation with identical number of steps.This 3rd embodiment is different from the first embodiment part and is, (step 11) was cut off program to the electric current supply of clothes drier integral body in advance with when prolonging to microcomputer 43 through 5 hours behind soft maintenance end of run, door 3 is as being opened before this, the program of Fig. 4 just forwards step S38 to, the opening that buzzer is shaken ring call user's attention door 3.Embodiment four

Figure 10 is the flow chart of explanation fourth embodiment of the invention, omit its explanation to the step identical with first embodiment is attached with identical number of steps, this the 3rd embodiment and the first embodiment difference are: when microcomputer 43 cuts off program to the power supply supply of clothes drier integral body and prolonged through 10 hours (step V1) after drying operation beginning, door 3 as be opened and then forward the program step S38 of Fig. 4 to before this shakes buzzer to ring the opening with call user's attention door 3.

The timing difference that picks up counting in the time delay before only being to cut off the electricity supply with regard to the 3rd and the 4th embodiment difference, and can obtain with the first embodiment same effect this point be self-evident.

The scope that the invention is not restricted to previous embodiment can followingly change like that or enlarge.

Signal means as cleaning phase of the filter 19 of notifying can adopt the LCD that is installed on the control panel 28, also can show the signal of " the cleaning phase that is filter " on this LCD.

The load current detection means of

ptc heater

16a, 16b can constitute with the mode that detects the whole load current of clothes drier, and soon the clothes drier complete machine load current that records under the state that the electrical equipment beyond ptc heater 16a, the 16b is stopped power supply is considered as the load current of

ptc heater

16a, 16b.

Umber of pulse by rotation detecting element 27 inputs in the certain hour when detection means that detection is housed in the thing amount that is dried in the dryer drums 4 also can be rotated with rotary drum 4 is that the basis is judged, be the tested material amount the more, it is slower that rotary drum 4 arrives the process of rotating stable state, the relevant therewith umber of pulse that begins to import from rotation detecting element in the certain hour from rotation also heals few, based on this point, can measure the thing amount that is dried that is contained in the rotary drum 4.

When the room temperature detection means can bring into operation by drying, detector unit 24 measured temperature were that the basis is judged, like this, the temperature sensor 53 that the room temperature of the usefulness among second embodiment detects usefulness can give omission.

Claims

1. clothes drier, comprise: the door of the opening of rotary drum is put into and taken out to the thing that is used to be dried, the heater that resistance characteristic just warm in nature is arranged, the fan of in described rotary drum, blowing by this heater, be located at fan therewith and constitute detachable filter in the air-supply path together, having when the running of described rotary drum switches on to described heater and fan carries out the control device of dry operation, it is characterized in that described clothes drier also comprises:

The door that detects described door open state open detection means,

Detect the load current value of described heater the load current detection means,

Set report in the time limit described filter the means of notifying of cleaning phase,

Having that when drying is moved described load current detection means detects than the reference current of setting is the load current value of little described heater, and during the notifying of described setting, when described door is opened the unlatching of detection means detecting gate, make the control device of notifying of the described means action of notifying.

2. clothes drier as claimed in claim 1 is characterized in that, after the phase of notifying of described setting can be set in dry rundown.

3. clothes drier as claimed in claim 1 is characterized in that the phase of notifying of described setting can be set in the dry running.

4. clothes drier as claimed in claim 1 is characterized in that, after the phase of notifying of described setting can be set in dry end of run at least,

In service in drying, have when heater loads current value that described load current detection means records is following less than described reference current value all power supplies and can begin to extend to power supply time-delay means from the dry end of run through till the time that sets to clothes drier.

5. clothes drier as claimed in claim 1, it is characterized in that, after the phase of notifying of described setting should be set in dry end of run at least, described control device stops to keep to heating installation power supply and when the dry rundown described state by fan air-supply, making the rotating soft maintenance operation of described dryer drums have when drying move, the described reference current value of heater loads current value ratio that described load current detection means records is for hour beginning to extend to the power supply time-delay means of passing through till the time that sets from the soft maintenance end of run to all power supply of clothes dryer.

6. clothes drier as claimed in claim 1, it is characterized in that, the described phase of notifying that sets should be set in the later stage of dry operation at least, have the heater loads current value that when drying is moved, records when being lower than described reference current value by described load current detection means, to all power supply of clothes drier can be from the drying operation begin to extend to power supply time-delay means till time through setting.

7. as arbitrary described clothes drier in the claim 1 to 6, it is characterized in that, be provided with the thing amount that the is dried detection means of the thing amount that is dried that detection accommodates in described rotary drum, described signal controlling means can be set described reference current value according to the thing amount that is dried that the described thing amount detection means that is dried records.

8. clothes drier as claimed in claim 7 is characterized in that, described signal controlling means are exported according to the standard of be dried thing amount and the heater that are recorded by the thing amount detection means that is dried and set described reference current value.

9. as claim 1 to 6 or the described clothes drier of claim 8, it is characterized in that the difference of the room temperature that the described signal means of notifying record according to this room temperature detection means and the fiducial temperature of setting can be carried out revisal to described reference current value.

10. clothes drier as claimed in claim 7, it is characterized in that the described reference current value of revisal is come on the basis that is provided with the difference that room temperature that the room temperature detection means that detects room temperature records according to described room temperature detection means with the described signal means of notifying compares with the fiducial temperature of setting.