CN101139792A

CN101139792A - Clogging detecting system for dryer

Info

Publication number: CN101139792A
Application number: CNA2007101487306A
Authority: CN
Inventors: 金珠炫; 金经勋; 裵纯哲; 许真硕; 金良桓; 闵珠英; 具滋仁
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2006-09-06
Filing date: 2007-09-06
Publication date: 2008-03-12
Anticipated expiration: 2027-09-06
Also published as: KR100844608B1; KR20080022438A; CN101139793B; CN101139792B; CN101139793A

Abstract

The present invention discloses a clogging detecting system for a dryer whic h can display a clogging degree or state of an air passage to the user through a remote controlling device. The clogging detecting system for the dryer includes the dryer for judging the clogging degree of the air passage, and sending the clogging degree to a remote controlling device, and the remote controlling device for receiving the clogging degree from the dryer, and displaying the clogging degree through a display unit.

Description

Drier with clogging detecting function

Technical field

The present invention relates to a kind of drier, and be specifically related to a kind of drier that to check and to show the clogging detecting function of ventilating duct chocking-up degree that has.

Background technology

Usually, washing machine with drying function comprises, main body with reservation shape formation, be installed in the cylinder in the main body, around cylinder and collect the bucket of washings, be used for the drive motors of swing roller, the detergent container of supplying detergent, be connected to the water supply pipe of detergent container, the washings that are used for a supplying washing water or mix with the washing agent of detergent container; Be used for discharging the drainpipe of the washings that washing uses, and the pump and the scupper hose that are connected to the drainpipe end, be used for mandatory discharge washings.

In having the washing machine of drying function, after clothing and washings were put into cylinder, the cylinder rotation made clothing to fall and utilize frictional force cleaning with laundry water along gravity direction.Recently, drum-type washing machine is not only washed but also can be by the hot air seasoning clothing.

Washing machine with drying function is divided into condensing type washing machine and discharge type washing machine.In the condensing type washing machine, the hot gas that heater produces is sent to cylinder by ventilation equipment, is used for the clothing of drying roller.After drying clothes, the gas in the cylinder becomes hot and humid degree gas and flow to the steam vent that is communicated with bucket.The nozzle that is used to spray cold water is installed in a side of steam vent, is used for removing the steam of hot and humid degree gas, and dry gas is offered ventilation equipment again.

In the discharge type washing machine, the hot gas that heater and ventilation equipment produce is through the clothing in the cylinder, and the steam vent that forms by the side at washing machine is from the outside exhaust of washing machine.Steam vent links to each other with the corrugated flexible hose that is connected to bucket.In case when baby or pet were closed in washing machine, steam vent can be used as passage.

When having the discharge type washing machine drying clothes of drying function, can produce velveteen (fine hair) in the clothing.Velveteen circulates in washing machine drum with hot gas, and discharges from washing machine through steam vent.

Provide a kind of and after washing, regularly collected, on the steam vent of washing machine, assembled to prevent velveteen from the structure of the velveteen of clothing generation.That is, cotton linters filter is placed in the steam vent to prevent to use for a long time in the washing machine process velveteen obstruction steam vent.

In traditional drier, steam vent is through exterior wall.Do not check original state (state in the installation) through the steam vent of exterior wall.Therefore, installation personnel must judge at random whether steam vent satisfies the minimum gauge of drier operation.

Advise traditional drier filter rinsed when each the use.But, because the cleaning of filter is inconvenient and complicated, so the user can carefully not clean.Filter is because dry repeatedly and stop up gradually, and this can increase drying time or power consumption.When filter seriously stopped up, thin velveteen was not collected in filter, but floating and cling clothing and drier, and besmirched clothing.And under the situation of discharge type drier, if the velveteen obstruction is used to discharge the steam vent of used gas and interrupts air-flow, then the user is not easy to check the obstruction of steam vent.

In addition, the obstruction of steam vent can be judged or check to traditional drier, but any information about the current chocking-up degree of steam vent or ventilating duct can not be provided.

Summary of the invention

The present invention is used to address the above problem.An object of the present invention is to provide a kind of the have drier of measuring ability and the choke detecting method that can accurately judge the chocking-up degree of ventilating duct.

Another object of the present invention provides a kind of drier and a kind of choke detecting method with measuring ability, and its chocking-up degree by checking ventilating duct and the information of blocking portion are shown to the user with the current state of ventilating duct.

But another object of the present invention provides a kind of drier and a kind of choke detecting method with measuring ability, and it can or provide the block information of ventilating duct according to the execution of drying operation such as the environmental change that the house moves and clears up.

But another object of the present invention provides a kind of control panel of drier, the block information that makes it can pass through user's instruction checking and show ventilating duct.

In order to obtain above-mentioned purpose of the present invention, a kind of drier with clogging detecting function is provided, comprising: the judging unit that is used to judge the chocking-up degree of ventilating duct; Be used to store the memory cell of the chocking-up degree of ventilating duct; With the display unit that chocking-up degree is shown to the user.Drier is not only notified the obstruction of ventilating duct, and the information about chocking-up degree is provided, and makes the user can accurately check the state of ventilating duct.

Display unit shows the chocking-up degree at least two stages, makes the user can check the progressively increase or the minimizing of the chocking-up degree of ventilating duct.

When chocking-up degree is in critical stage, the display unit warning.Repair at needs under the situation of ventilating duct, can inform the state of user's ventilating duct.

Display unit vision or sense of hearing ground show chocking-up degree, the feasible chocking-up degree that can inform under any situation of user.

Display unit shows the chocking-up degree of cotton linters filter and the chocking-up degree of blast pipe.Therefore, drier can not provide the fringe of ventilating duct, and provides the detailed blocked state of cotton linters filter and blast pipe.

Drier comprises input block, is used for starting according to user's decision instruction the decision operation of judging unit.The user can be easy to check the chocking-up degree of ventilating duct by the instruction of input obstruction detection in person.

Drier comprises the memory cell of the chocking-up degree that is used to store ventilating duct.The chocking-up degree of the judgement of ventilating duct is stored and with the data that act on the obstruction progress degree of judging ventilating duct.

Drier comprises: the operating unit that is used for carrying out drying operation on ventilating duct; And the stop element that is used for the drying operation of shut-down operation unit.

The power supply of stop element break-in operation unit, and this judging unit comprises the control module of chocking-up degree of connection/cut-outs judgement ventilating duct of the drying operation that the detecting unit and being used for of the connection/cut-out of the drying operation that is used to detect stop element detects according to detecting unit.That is, the connection/cut-out of the drying operation that is closely related with ventilating duct is as the data of the chocking-up degree of judging ventilating duct.

Drier comprises the connecting line that is used for detecting unit is connected to operating unit or stop element.Even detecting unit and operating unit or stop element are more or less had a few distance each other in drier, but they can connect by connecting line, are used for executive communication.

Stop element will cut off control instruction according to the temperature of ventilating duct and be sent to operating unit, and judging unit is judged the chocking-up degree of ventilating duct according to the connection/cut-out of the drying operation of stop element.Therefore, the drier basis is judged chocking-up degree easily by the connection/cut-out of the drying operation of the common cut-out control instruction of carrying out in drier, and does not need other checkout gear.

Judging unit is checked the chocking-up degree of ventilating duct by connection/cut-out dutycycle of calculating drying operation.Therefore, drier can accurately be checked the chocking-up degree of ventilating duct apace.

Control module is judged the chocking-up degree of ventilating duct according to the point first break time of the drying operation of stop element.Drier can easily be judged chocking-up degree fast, and does not need complicated data manipulation.

Drier comprises the operating unit that is used for carrying out drying operation on ventilating duct, and judging unit comprises temperature sensing unit, this temperature sensing unit is used for the temperature of sensing ventilating duct, and control module, is used for changing the chocking-up degree of judging ventilating duct according to the temperature sensing unit sensed temperature.The variations in temperature that drier flows according to the ventilating duct that is closely related with ventilating duct can accurately be judged the chocking-up degree of ventilating duct.

Drier also further comprises comparing unit that the chocking-up degree that is used for the chocking-up degree that will judge and at least one pre-stored of ventilating compares and the display unit that shows comparative result.Therefore, drier can be judged the progress degree of the blocked state of ventilating duct by the frequency of utilization that increases drier.

Drier comprises the original state setup unit, be used for the chocking-up degree of judging being set at initial chocking-up degree when the difference between the initial chocking-up degree of the chocking-up degree of chocking-up degree of judging and pre-stored during not corresponding to the initial difference term of reference of the comparative result of unit as a comparison.Therefore, drier can be judged the obstruction progress degree of ventilating duct.

Drier comprises the original state setup unit, is used for when the chocking-up degree of pre-stored does not exist, and the chocking-up degree of judging is set at initial chocking-up degree.After the chocking-up degree of at first judging drier, drier is stored as this value the original state of ventilating duct.

Initial chocking-up degree is the chocking-up degree of blast pipe.When at first drier being installed, the ventilating duct in the drier does not stop up fully.This chocking-up degree is judged as the chocking-up degree of blast pipe.

Drier comprises setup unit, is used for the comparative result of the comparing unit between the chocking-up degree of chocking-up degree of judging and last storage is set at the chocking-up degree of cotton linters filter or stops up the progress degree.Therefore, drier can be judged the chocking-up degree of cotton linters filter or stop up the progress degree than the chocking-up degree of blast pipe or stop up the progress degree and increase or reduce more slowly.

Drier comprises: first comparing unit, and the chocking-up degree that is used for judging is made comparisons with the obstruction reference of blast pipe; With second comparing unit, be used for obstruction with difference between the chocking-up degree of the chocking-up degree of pre-stored and judgement and cotton linters filter with reference to making comparisons.Drier is preferentially judged the chocking-up degree of blast pipe.

Drier comprises display unit, is used for showing the obstruction of blast pipe or the obstruction of cotton linters filter according to the comparative result of first comparing unit or second comparing unit.Therefore, the user can check the obstruction of blast pipe and the obstruction of cotton linters filter respectively.

In another aspect of this invention, provide a kind of control panel to drier, having comprised: input block is used to obtain the decision request from the chocking-up degree of user's ventilating duct; And display unit, be used for chocking-up degree according to decision request demonstration ventilating duct.The user can import the decision request of the chocking-up degree of ventilating duct in person in the time of needs, and checks the chocking-up degree of ventilating duct.

Display unit vision or sense of hearing ground show chocking-up degree.

Display unit shows the chocking-up degree at least two stages.

When chocking-up degree is in critical stage, the display unit warning.

Display unit shows the chocking-up degree of cotton linters filter and the chocking-up degree of blast pipe.

Also in another aspect of this invention, provide a kind of choke detecting method of drier, having comprised: the step of judging the chocking-up degree of ventilating duct; When the initial chocking-up degree of pre-stored, the step that chocking-up degree and the initial chocking-up degree judged are made comparisons; When the difference between chocking-up degree of judging and the initial chocking-up degree during not corresponding to result's as a comparison initial difference term of reference, first storing step is stored as new initial chocking-up degree with the chocking-up degree of judging; And when initial chocking-up degree was not stored, second storing step was stored as initial chocking-up degree with the chocking-up degree of initial decision.After drier was installed in particular space, the chocking-up degree of ventilating duct was checked according to using first or repeatedly of drier and is stored.

The choke detecting method of drier comprises the step that shows initial chocking-up degree, makes the user can know the initial chocking-up degree of ventilating duct.

Initial chocking-up degree is the chocking-up degree of blast pipe, and difference is the obstruction progress degree of blast pipe.

The choke detecting method of drier comprises the 3rd storing step, when the difference between chocking-up degree of judging and the initial chocking-up degree during corresponding to result's as a comparison initial difference term of reference, and the chocking-up degree that storage is judged.

The choke detecting method of drier comprises when the difference between chocking-up degree of judging and the initial chocking-up degree during corresponding to result's as a comparison initial difference term of reference, shows the step of difference.

Difference is to stop up the progress degree of cotton linters filter, and the summation of difference is the chocking-up degree of cotton linters filter.

Also in another aspect of this invention, provide a kind of choke detecting method of drier, having comprised: the step of judging the chocking-up degree of ventilating duct; With the obstruction of the pre-stored of chocking-up degree and blast pipe with reference to the step of making comparisons; And when chocking-up degree in comparison step corresponding to the obstruction of blast pipe with reference to the time, show the step of the obstruction of blast pipe.Therefore, the obstruction of blast pipe can preferentially be judged aspect ventilating duct.

The choke detecting method of drier comprises: second comparison step, be used for when the comparison step chocking-up degree not corresponding to the obstruction of blast pipe with reference to the time, the relatively difference between the chocking-up degree of chocking-up degree of judging and last storage and the obstruction reference of cotton linters filter; And the obstruction of filtering corresponding to the velveteen in second comparison step when difference with reference to the time, show the step of the obstruction of cotton linters filter.

When difference in second comparison step not corresponding to the obstruction of cotton linters filter with reference to the time, the choke detecting method of drier comprises the step of the chocking-up degree that storage is judged.

Description of drawings

The present invention will become better understood with reference to the accompanying drawings, and this accompanying drawing only provides by way of example and is not to be to limit the invention, wherein:

Fig. 1 is the cross-sectional view of illustration according to drier of the present invention;

Fig. 2 is the decomposition diagram of illustration according to drier of the present invention;

Fig. 3 is the fragmentary cross-sectional view of illustration according to drier of the present invention;

Fig. 4 is the structure chart of illustration according to the drier of the first embodiment of the present invention;

Fig. 5 is the circuit diagram of the testing circuit of illustration Fig. 4;

Fig. 6 and 7 is curve maps that the output waveform of testing circuit is shown;

Fig. 8 is the curve map that illustrates by the connection/cut-out of microcomputer identification;

Fig. 9 is the structure chart of illustration drier according to a second embodiment of the present invention;

Figure 10 is the curve map that illustrates by the connection/cut-out of the drying operation of the temperature of the microcomputer of Fig. 9 identification;

Figure 11 is the curve map that the variations in temperature of being discerned by the microcomputer of Fig. 9 is shown;

Figure 12 is the curve map that the temperature waveform of temperature sensor senses is shown;

Figure 13 is the flow chart that illustrates according to the sequential steps of the choke detecting method of the drier of the first embodiment of the present invention;

Figure 14 is the flow chart of sequential steps that the choke detecting method of drier according to a second embodiment of the present invention is shown;

Figure 15 is the flow chart of sequential steps of choke detecting method that the drier of a third embodiment in accordance with the invention is shown;

Figure 16 is the flow chart of sequential steps of choke detecting method that the drier of a fourth embodiment in accordance with the invention is shown;

Figure 17 to 19 is the schematic diagrames that are illustrated in according to the demonstration example in the choke detecting method of the present invention; And

Figure 20 to 23 is the schematic diagrames that are illustrated in according to the other demonstration example in the choke detecting method of the present invention.

The specific embodiment

Drier according to a preferred embodiment of the invention will specifically be described with reference to the drawings now.

Various aspect of asking for protection of the present invention will be described now.Following description can become the part of detailed description of the present invention.Following explanation can be thought the technical thought of the present invention understood with different viewpoints, perhaps can think the minimum technology according to the control panel of drier of the present invention or drier, rather than as limited field of the present invention.

Fig. 1 is the cross-sectional view of illustration according to drier of the present invention, and Fig. 2 is the decomposition diagram of illustration according to drier of the present invention, and Fig. 3 is the fragmentary cross-sectional view of illustration according to drier of the present invention.Illustrated the discharge type drier below, its intention and not lying in limits.

With reference to figure 1, discharge type drier 1 comprises, is arranged in the cylinder wheel 10 that is used for accommodating laundry in the housing 1, is used for gas is supplied to the suction passage 20 of cylinder 10, be installed in the heater 30 on the suction passage 20, and the exhaust passage 40 that discharges gas from housing 1 through cylinder 10.Under the situation of discharge type drier 1, blast pipe 50 is couple to exhaust passage 40, is used for the interior wall 60 outside exhausts through structure.

Ventilation equipment 43 are installed in a side of suction passage 20 or exhaust passage 40.Hereinafter, suppose that ventilation equipment 43 are installed in a side of exhaust passage 40.

As shown in Fig. 2 and 3, housing 1 comprises pedestal 2, be installed in the housing body 3 of the upper part of pedestal 2, be installed in the case lid 4 on the front surface of housing body 3, be installed in the rear board 7 on the rear surface of housing body 3, be installed in the top cover 8 on the top surface of housing body 3 and be installed in the control panel 94 on the top of case lid 4.

Still with reference to figure 2, clothing inlet 5 forms on case lid 4, be used for clothing is put into cylinder 10, and the door 6 rotary case lid 4 that are connected to is used to open and close clothing inlet 5.Control panel 9 is installed in the top of case lid 4.Control panel 9 comprises the input block 9a that is used to obtain from user's input, and display unit 9b, is used to show the state (for example, the selection of oven dry treatment state, oven dry degree of treatment, remained drying time, oven dry pattern etc.) of drier 1.The fore-stock 11 that is used for rotary back-up roller 10 front ends is placed in the aft section of case lid 4.

The after-poppet 12 of the rear end of rotary back-up roller 10 is placed in the previous section of rear board 7.Be used to make the suction passage 20 of cylinder 10 and through hole 13 that intake section communicates with each other on after-poppet 12, to form, make gas can be supplied to the intake section of cylinder 10 through suction passage 20.

Shown in Fig. 2 and 3, the cylinder 10 that is used for the cylindrical vessel of accommodating laundry is opened with forward and backward directions, make gas can with forward and direction backward through cylinder 10.Rear opening partly forms the intake section of cylinder 10, and the opening portion of front forms the exit portion of cylinder 10.Be used for protruding from the inner circumferential of cylinder 10 along the lifter 14 of the rotation and lifting clothing of cylinder 10.

Suction passage 20 is formed by suction hose, and this suction hose connects its bottom to be communicated with the rear end with heater 30, and makes its top connection to be communicated with the through hole 13 of after-poppet 12.

Still with reference to figure 2 and 3, heater 30 is installed on the top surface of pedestal 2, comprises the heater housing that is communicated with suction passage 20 (that is, suction hose 20), and the heat that is arranged in the heater housing produces coil.When power supply was supplied to heat to produce coil, the inner space of heater housing and heater housing were heated itself, made the gas through the heater housing can convert the gas of high temperature low humidity to.

Exhaust passage 40 is by forming with the lower part: lint duct 42 is communicated with to discharge gas from cylinder 10 with the exit portion of cylinder 10; Cotton linters filter 41 is installed on the lint duct 42, is used for filtering such as the impurity from the velveteen of the gas of discharging; Fan drum 44 is communicated with lint duct 42 and ventilation for enclosures fan 43, and blast pipe 46, the one end is connected being communicated with fan drum 44, and its other end is stretched out from housing 1.The blast pipe 50 that is used for being directed to from the gas that housing 1 discharges outdoor space is connected to blast pipe 46.Blast pipe 50 is formed at housing 1 outside, is used for gas is directed to outdoor space.Blast pipe 50 can be installed the interior wall 60 through structure.

According to the present invention, ventilating duct comprises suction passage 20, the inner space of cylinder 10, exhaust passage 40 and blast pipe 50.The obstruction of ventilating duct mainly occurs in the exhaust passage 40 and blast pipe 50 of cotton linters filter 41.Relatively less interrupt air-flow by the obstruction in the exhaust passage 40 of cotton linters filter 41 than the obstruction of blast pipe 50.

Operation according to discharge type drier 1 of the present invention will be described now.

When the user puts into cylinder 10 to clothing, close to the doorstep 6 and during by control control panel 9 operation discharge type driers 1, discharge type drier 1 is connected heater 30 and drive motors 72.

When heater 30 is connected, the inside of heater 30 heat driers 1, and when motor 72 is driven, belt 70 and draught fan 43 rotations.When belt 70 rotations, cylinder 10 rotations.At the clothing of cylinder 10 by lifter 14 lifting repeatedly.

When draught fan 43 rotations, the outdoor gas of housing 1 is sucked in the gas suction hole 7a of bonnet 7 by the air blast power of ventilation equipment 43, and is supplied to the slit between housing 1 and the cylinder 10.Gas in the slit between housing 1 and cylinder 10 is introduced to heater 30, is heated into high temperature low humidity gas, and sucks in the cylinder 10 through the suction passage 20 and the through hole 13 of after-poppet 12.

Suck in the cylinder 10 high temperature low humidity gas along cylinder 10 forwards to flowing, become the high humility gas with contact with clothing, and be discharged to exhaust passage 10.

The gas that is discharged to exhaust passage 40 is by blast pipe 46, and process blast pipe 50 discharges.

Fig. 4 is the structure chart of illustration according to the drier of the first embodiment of the present invention.As shown in Figure 4, drier comprises the first thermostatic chamber TS1 and the second thermostatic chamber TS2, be used for outside public power is supplied with heater 30, the first thermostatic chamber TS1 and the second thermostatic chamber TS2 connect and cut off according to the temperature of heater 30 or by the gas temperature of heater 30 heating, switch SW is connected and is cut off by the control instruction of microcomputer 90, be used for public power is imposed on heater 30, input block 9a, display unit 9b, heater 30, draught fan 43, motor 72, testing circuit 80, the power supply of supplying with heater 30 is judged in the connection/cut-out that is used for according to the first thermostatic chamber TS1 and the second thermostatic chamber TS2, with microcomputer 90, be used for judging the operation possibility of the first thermostatic chamber TS1 and the second thermostatic chamber TS2 according to the power supply status that comes self-detection circuit 80.Be used for being supplied to the power subsystem of microcomputer 90, input block 9a and display unit 9b not illustrate from the public power source DC power supply.But the those of ordinary skill of suitable application area of the present invention readily understands power subsystem.

The first thermostatic chamber TS1 and the second thermostatic chamber TS2, as a class temperature control unit, be placed in heater 30 1 sides or near, and produce reaction to the temperature of heater 30 or by the gas temperature of heater 30 heating.If temperature does not reach predetermined overtemperature, then the first thermostatic chamber TS1 and the second thermostatic chamber TS2 connect continuously.If temperature surpasses overtemperature, then the first thermostatic chamber TS1 and the second thermostatic chamber TS2 cut off and public power can not imposed on heater 30.Especially, in order to compensate the second thermostatic chamber TS2,, then can not get back to on-state in case the first thermostatic chamber TS1 cuts off.For example, the first thermostatic chamber TS1 and the second thermostatic chamber TS2 are placed on the suction passage 20 that is connected to heater 30.

A kind of switch SW of delay type is kept on-state during the connection by microcomputer 90 is controlled at drying operation, and keeps dissengaged positions by the cut-out control of microcomputer 90.

Input block 9a receives the control instruction of oven dry from the user, and this control instruction is imposed on microcomputer 90.In addition, so judge the blocked state or the degree of ventilating duct (being specially blast pipe 50), thereby input block 9a obtains the state-detection instruction from user's ventilating duct, and instruction is imposed on microcomputer 90.The state-detection instruction of input block 9a can be stored in the microcomputer 90.Input block 9a forms on the front surface of control panel 9.But the special-purpose input block of state-detection instruction can be installed in the rear surface or the interior section of housing body 3.

Display unit 9b shows the user's input that is used for drying operation, the blocking portion of oven dry degree of treatment, remained drying time and chocking-up degree and ventilating duct.According to the present invention, ventilating duct comprises inside, exhaust passage 40 and the blast pipe 50 of suction passage 20, cylinder 10.Especially, ventilating duct can show the cotton linters filter 41 and the blast pipe 50 of exhaust passage 40.

Testing circuit 80 is connected respectively to node N1 and N2, is used for judging whether electric current flows at the series circuit that comprises heater 30, that is, whether power supply is supplied to heater 30.For this reason, testing circuit 80 is connected respectively to node N1 and N2 by connecting line 80a and 80b.Because testing circuit 80 is installed on the control panel 9 that is mounted with microcomputer 90, so connecting

line

80a and 80b place along the inner space between the surface, inside of cylinder 10 and housing body 3 or housing body 3.

In more detail, testing circuit 80 bases judge by the first thermostatic chamber TS1 of the temperature of heater 30 or gas and connection/rupturing operation of the second thermostatic chamber TS2 whether power supply is supplied to heater 30.Be supplied to the power supply of heater 30 can also be by the switch SW control of the control operation of microcomputer 90.When switch SW was connected, microcomputer 90 was according to the signal check power supply status that comes self-detection circuit 80.When switch SW was cut off, microcomputer 90 not will consider the signal of self-detection circuit 80.

Testing circuit 80 imposes on microcomputer 90 according to power supply status with different signals, makes microcomputer 90 can check the power supply status of heater 30.Be different from Fig. 4, the input of testing circuit 80 can be connected between the first thermostatic chamber TS1 and the public power and between heater 30 and the switch SW.In the series circuit of being made up of public power, the first thermostatic chamber TS1 and the second thermostatic chamber TS2, heater 30 and switch SW, the potential difference at heater 30 two ends can be according to the supply of public power and by the clearest sign.Therefore, testing circuit 80 is connected always to detect the potential difference of the part that comprises heater 30.

As mentioned above, microcomputer 90 is carried out drying operations by basis from the user's of input block 9 instruction control heater 30, switch SW and motor 72 with by motor 72 operation draught fans 43.Microcomputer 90 comprises the memory cell (not shown) of storing this control algolithm.For example, EEPROM can be used as memory cell.

Microcomputer 90 and testing circuit 80 are placed on the rear surface 9 of control panel.

In addition, microcomputer 90 is according to the information of blocking of the detection signal judgement that comes self-detection circuit 80 about power supply and the first thermostatic chamber TS1 and the second thermostatic chamber TS2.

Fig. 5 is the circuit diagram of the testing circuit of illustration Fig. 4.With reference to figure 5, testing circuit 80 comprises diode D1, is used for applying just (+) voltage from the input voltage of node N1; Resistance R 1 is used to reduce the input voltage from node N1; Diode D2 and capacitor C1 are used to prevent to be included in the noise of the input voltage of the input 11 that imposes on photoelectrical coupler PC and 12; Photoelectrical coupler PC, according to input voltage connection/cut-out, with resistance R 2 and capacitor C2, be connected to the output 01 of photoelectrical coupler PC, be used for providing the different voltage waveform that is lower than reference voltage Vref according to connection/cut-out of photoelectrical coupler PC, this reference voltage Vref is the DC voltage of microcomputer 90.Reference voltage Vref is used as the driving voltage of microcomputer 90 in the circuit that comprises microcomputer 90.Omitted the explanation that produces the power subsystem of reference voltage Vref.The those of ordinary skill of suitable application area of the present invention can readily understand the generation of reference voltage Vref.

For example, when public power was AC 240V, potential difference approximately was 240V between node N1 and N2.If this voltage imposes on photoelectrical coupler PC, then may damage photoelectrical coupler PC.Provide resistance R 1 input voltage is reduced to tens volts.

If between node N1 and N2, have potential difference, that is,, then impose on the input of photoelectrical coupler PC corresponding to the voltage of potential difference if the first thermostatic chamber TS1 and the second thermostatic chamber TS2 are switched to power supply to heater 30.Because voltage is AC voltage, so the interior lights diode is luminous according to the cycle of voltage, and the diode connection/cut-out of light receiving unit, be used for square wave is imposed on microcomputer 90.If there is not potential difference between node N1 and N2, that is, if the first thermostatic chamber TS1 and the second thermostatic chamber TS2 cut off and power supply do not supplied with heater 30, then the input of testing circuit 80 has same potential.Therefore, the interior lights diode is not luminous, and cuts off as the diode of light receiving unit, is used for imposing on microcomputer 90 continuously with the approaching dc voltage waveform of reference voltage Vref.

Fig. 6 and 7 is curve maps that the output waveform of testing circuit is shown.As shown in Figure 6, when the first thermostatic chamber TS1 and the second thermostatic chamber TS2 connect, apply heater 30 as the public power of AC voltage.The voltage difference that size equates with public power produces between node N1 and N2.Photoelectrical coupler PC connects owing to voltage is different.Because public power is an AC voltage,, thus the square wave littler than reference voltage Vref imposed on microcomputer 90 so photoelectrical coupler PC connected repeatedly/cuts off according to the cycle of public power.

As shown in Figure 7, when the first thermostatic chamber TS1 or second thermostatic chamber TS2 cut-out, power supply is not supplied to heater 30.Node N1 has identical current potential with N2.Therefore, photoelectrical coupler PC cuts off always, will impose on microcomputer 90 with the dc voltage (for example, high signal) that reference voltage Vref is similar to thus.

Therefore, microcomputer 90 can calculate the power supply time to chopping of heater 30 of the dissengaged positions of the first thermostatic chamber TS1 and the second thermostatic chamber TS2 according to the waveform of the dc voltage that applies.

Fig. 8 is the curve map of connection/cut-out that the microcomputer identification of Fig. 5 is shown.In Fig. 8, R represents the diameter of blast pipe 50, and the unit of use is an inch.That is, when the diameter of blast pipe 50 was R (2.0), R (2.3), R (2.625), R (2.88) and R (3.0), microcomputer 90 imposed on the connection/cut-out of the power supply of heater 30 according to the signal identification from the testing circuit 80 of Fig. 6 and 7.If diameter is big, then the state of ventilating duct (chocking-up degree or stop up advance degree) is light, and if diameter is little, then the state of ventilating duct (chocking-up degree or stop up advance degree) is serious.

The method that suggestion uses the dissengaged positions inspection by switch SW to impose on the power supply point first break time of heater 30 is checked the state of ventilating duct.

Put the comparative result of putting t5 first break time of t4 and R (2.625) according to first break time of putting t3, R (2.0) first break time of putting t2, R (1.5) first break time of putting t1, R (1.0) first break time of R (0), this is more little than minor diameter, and first dissengaged positions makes progress slowly more.When diameter hour, the gas flow of discharging by ventilating duct (being specially blast pipe 50) reduces, and the environment temperature of temperature sensor 82 slowly raises.In this experiment, diameter is corresponding to the blocked state of ventilating duct.If diameter is big, then ventilating duct stops up lessly, and if diameter is little, then ventilating duct stops up manyly.As mentioned above, microcomputer 90 can be checked according to the recognition data of connection/cut-out curve map of for example Fig. 8 and put the state of judging ventilating duct first break time.

The blocked state of ventilating duct is judged in suggestion with the method for connection/cut-out dutycycle of calculating power supply.In this embodiment, can use one of them or both that connect dutycycle (x '/y ') and cut-out dutycycle (z '/y ').Wherein, explain cutting off dutycycle (z '/y ').

The cut-out dutycycle of R (2.0) is 0.48 (connection dutycycle wherein is 0.52), the cut-out dutycycle of R (2.3) is 0.32 (connection dutycycle wherein is 0.68), the dutycycle of closing R (2.625) is 0.26 (connection dutycycle wherein is 0.74), the cut-out dutycycle of R (2.88) is 0.13 (connection dutycycle wherein is 0.87), and the cut-out dutycycle of R (3.0) is 0 (connection dutycycle wherein is 1).That is, diameter is more little, and it is high more to cut off dutycycle.Connecting dutycycle increases relatively.Therefore, microcomputer 90 can be judged ventilating duct by calculate cutting off dutycycle) current chocking-up degree (be specially the blocked state of cotton linters filter 41 or blast pipe 50.

Fig. 9 is the structure chart of illustration drier according to a second embodiment of the present invention.Different with the drier of Fig. 4, the drier of Fig. 9 does not comprise testing circuit 80, but comprises temperature sensor 82a and 82b, is used for gas temperature and the microcomputer 90a of sensing at ventilating duct, is used to check the state of ventilating duct.Structural detail with same names and numeral is carried out identical functions.

Temperature sensor 82a, the temperature of its sensing exhaust passage 40 can be a kind of thermostatic chamber.For the gas temperature of sensing through cotton linters filter 41, temperature sensor 82a is placed in the rear end 41 of the cotton linters filter on the exhaust passage 40.Because exhaust passage 40 and blast pipe 50 communicate with each other, so though temperature sensor 82a is placed on the exhaust passage 40 behind the cotton linters filter 41, temperature sensor 82a can sensing and the immediate temperature of temperature of blast pipe 50.Provide temperature sensor 82b with the temperature (for example, water temperature, gas temperature etc.) in the sensing roller 10.Hereinafter, temperature sensor 82a and 82b can be called temperature sensor 82.

For with the temperature maintenance of exhaust passage 40 in preset range (for example, 100 to 110 ℃), microcomputer 90a is by according to the generation of being controlled hot heater 30 by temperature sensor 82a sensed temperature connection/cut-out switch SW.

State below microcomputer 90a uses.For example, stop up if ventilating duct (being specially blast pipe 50 or cotton linters filter 41) is serious, because the air-flow from the space of open air is not smooth, so temperature of heater 30 or raise and influence the first thermostatic chamber TS1 and the second thermostatic chamber TS2 (hereinafter, being called " temperature control unit ") by the gas temperature of heater 30 heating.But, because air-flow is not smooth, so can relatively slowly raise by temperature sensor 82a sensed temperature.Connection/cut-out the control of microcomputer 90a by utilizing switch SW is the state that the fact that the state according to ventilating duct changes is checked ventilating duct.Wherein, the state of ventilating duct comprises the position of the part of the chocking-up degree of ventilating duct and obstruction.For example, if cotton linters filter 41 is more or less blocked, then chocking-up degree is light, and if ventilating duct 50 stops up, then chocking-up degree is serious.

When the chocking-up degree of ventilating duct was light, the gas temperature and temperature sensor 82 sensed temperature that influence temperature control unit were very inequality.Even before temperature control unit blocks power supply, temperature raises continuously, and microcomputer 90a also can cut off by gauge tap SW.

On the contrary, when the chocking-up degree of ventilating duct was serious, the gas temperature that influences temperature control unit was than higher by temperature sensor 82 sensed temperature.Before microcomputer 90a gauge tap SW, temperature control unit cuts off automatically.Therefore, have only when the gas temperature of exhaust passage 40 surpass preset range for a long time after, microcomputer 90a just understands gauge tap SW.But when checking the state of ventilating duct after microcomputer 90a is using drier 1 first or cleaning cotton linters filter 41, microcomputer 90a checks the state (obstruction) of blast pipe 50.

Figure 10 is the curve map that illustrates by the connection/cut-out of the drying operation of the temperature of the microcomputer of Fig. 9 identification.In Figure 10, R represents the diameter of blast pipe 50, and the unit of use is an inch.Diameter at blast pipe 50 is under the situation of R (0), R (1.0), R (1.5), R (2.0) and R (2.625), and microcomputer 90a is according to temperature sensor 82a sensed temperature connection/cut-out switch SW.If diameter is big, then the state of ventilating duct (chocking-up degree) is light, and if diameter is little, then the state of ventilating duct (chocking-up degree) is serious.

Suggestion uses the method for connection/cut-out dutycycle of calculating power supply to check the state of ventilating duct.In this embodiment, can use one of them or both that connect dutycycle (x/y) and cut-out dutycycle (z/y).Table 1 illustrates the state according to the ventilating duct of the experimental result of the curve map that comprises Figure 10.

Table 1

Cut off dutycycle	Chocking-up degree	Blocking portion
Cut off dutycycle	Chocking-up degree	Blocking portion		0~0.30	-	-

0.30~0.45 0.45~0.60 0.60~

In the middle of low (gently) high (seriously)

Cotton linters filter cotton linters filter discharge pipe

The question blank of microcomputer 90a storage such as table 1, calculating is reflected in the cut-out dutycycle (perhaps connecting dutycycle) of the connection/cut-out control characteristic of the switch SW during the drying operation, and the question blank of question blank and pre-stored made comparisons, check the blocked state (chocking-up degree, choking portion are graded) of corresponding region thus.

In addition, the state of the ventilating duct of microcomputer 90a storage current check, and pass through the state that display unit 9b shows ventilating duct.In the installation process of drier 1, microcomputer 90a notifies user's (or installation personnel) successful installation.That is, when the chocking-up degree of ventilating duct was serious, microcomputer 90a shows need reinstall the message of drier 1, or was presented at and needs other wall perforation so that the message that blast pipe 50 broadens on the outside wall.

The state of the ventilating duct of current check is subjected to the influence of the perforation of exterior wall.The chocking-up degree of the ventilating duct of checking behind initial installation drier 1 or cleaning cotton linters filter 41 is owing to the use of drier 1 becomes more serious.Therefore, microcomputer 90a is used as reference state or deviant with the state of the ventilating duct of current check.

Under state the situation as reference state (initial chocking-up degree) of microcomputer 90a with the ventilating duct of current check, microcomputer 90a is automatically or according to the state of checking the ventilating duct of instruction checking in each drying operation from state of user, and the state of the pre-stored of the state of ventilating duct and ventilating duct made comparisons, judge the current state of ventilating duct thus.

At microcomputer 90a the state of the ventilating duct of current check is used as under the situation of deviant, microcomputer 90a carries out drying operation by the oven dry algorithm that changes the current state that reflects ventilating duct.That is, microcomputer 90a informs the state of ventilating duct the temperature control, drying time etc. of the switch SW of oven dry algorithm.

In addition, microcomputer 90a is shown to the user with the state of the judgement of ventilating duct.But this user of being presented at carries out after finishing drying operation by drier 1, is used to prevent that the user from stopping drying operation and cleaning cotton linters filter 41.That is, can protect the user to avoid burn.

Microcomputer 90a has the information about each critical stage of the chocking-up degree of the chocking-up degree of blast pipe 50 and cotton linters filter 41.If the chocking-up degree of the chocking-up degree of blast pipe 50 or cotton linters filter 41 is in critical stage, then microcomputer 90a provides corresponding alarm and shows by display unit 9b.For example, cut off the critical stage that dutycycle 0.5 can be set at cotton linters filter 41, and cut off the critical stage that dutycycle 0.8 may be set at blast pipe 50.

Figure 11 is the curve map of variations in temperature that the microcomputer identification of Fig. 9 is shown.Under Light Condition, wherein there is not clothing to put into drier 1, the gas temperature that heats at heater 30 reaches after 60 ℃, stops heater 30 and produces heats.Figure 11 illustrates the time that reaches 40 ℃ of costs.Wherein, the temperature of the gas of heating is the gas temperature in suction passage 20 or cylinder 10.In this embodiment, can use the temperature sensor 82b that is installed in the cylinder 10.

As shown in figure 11, the diameter of blast pipe 50 is more little, and gas temperature reduces slowly more.Gas temperature is subjected to flowing through the influence of the air-flow of blast pipe 50.The degree of the diameter of decrease of temperature degree (for example, speed) expression blast pipe 50.As mentioned above, the diameter of blast pipe 50 is corresponding to the state (obstruction) of ventilating duct.Microcomputer 90a checks the state of ventilating duct according to the decrease of temperature degree.

As mentioned above, microcomputer 90a can store the original state of ventilating duct and used as reference state or deviant.

Figure 12 is the curve map that the temperature waveform of temperature sensor senses is shown.Under no-load condition, there is not clothing to put into drier 1,72 of heater 30 and motor is driven.The gas temperature that Figure 12 illustrates temperature sensor 82a sensing changes.

As shown in figure 12, the diameter of blast pipe 50 is more little, and gas temperature changes fewly more within the predetermined time.Gas temperature be subjected to the flowing through influence of gas of blast pipe 50.Variation of temperature degree (for example, speed) is relevant with the degree of the diameter of blast pipe 50.As mentioned above, the diameter of blast pipe 50 is corresponding to the state (obstruction) of ventilating duct.Microcomputer 90a can check the state of ventilating duct according to the variation of temperature degree.

For example, when microcomputer 90a execution drying operation reached 1 minute 21 seconds, diameter was big more, and the end temperature of C1 to C5 is high more.Therefore, microcomputer 90a can be according to changed blocked state or the degree of checking ventilating duct by temperature sensor 82a sensed temperature.

Microcomputer 90a not only stores the blocked state or the degree of ventilating duct, but also storing temperature is used to judge blocked state or chocking-up degree with reference to Tr.When drying operation is carried out one section setting-up time (for example, 1 minute 21 seconds etc.), temperature reference Tr with the temperature A before the drying operation and drying operation afterwards temperature B between difference make comparisons.Temperature reference Tr (=B-A) corresponding to the variations in temperature of drying operation.Temperature reference Tr is to be used for judging the value that blast pipe 50 stops up at least.In addition, temperature reference Tr can be set at the constant in the drying operation under the Light Condition, or according to the variable setting of the laundry amounts of load condition.

Microcomputer 90a is the two or more blocked states or the chocking-up degree of ventilating duct relatively, and judges the progress (increase or reduce) of the chocking-up degree of ventilating duct.When drier 1 was carried out drying operation for several times, the blocked state of ventilating duct changed.Microcomputer 90a judges the intensity of variation of the blocked state of ventilating duct, and provides it to the user by display unit 9b.Microcomputer 90a makes comparisons the blocked state or the degree of the ventilating duct of the blocked state of the ventilating duct of current judgement and chocking-up degree and last pre-stored, and judges the obstruction progress degree of ventilating duct.

Microcomputer 90a shows the state that ventilating duct is checked by display unit 9b.In drier 1 process was installed, microcomputer 90a can be shown to successful installation user's (or installation personnel).That is, when the chocking-up degree of ventilating duct was serious, microcomputer 90a shows need reinstall the message of drier 1, or was presented at and needs other wall perforation so that the message that blast pipe 50 broadens on the exterior wall.

The state of the ventilating duct of current check is subjected to the influence of the perforation of exterior wall.The chocking-up degree of the ventilating duct of checking after initial installation drier 1 or cleaning cotton linters filter 41 is owing to the use of drier 1 becomes even more serious.Therefore, microcomputer 90a can judge the progress degree of obstruction.

As mentioned above, microcomputer 90a is with the original state storage of ventilating duct and used as reference state or deviant.

Microcomputer

90a or 90a are according to aforesaid method, and the chocking-up degree with ventilating duct in each drying operation is stored in the memory cell.Simultaneously,

microcomputer

90a or 90a can store conduct with reference to the initial blocked state of state and five chocking-up degrees checking in last drying operation.

Fig. 4 and 9 drier go for Figure 13 and 14.For convenience of description, illustration Fig. 9 drier and comprise the table 1 of the connection/cut-out dutycycle of power supply.In addition, also used the connection dutycycle.

Figure 13 is the flow chart that illustrates according to the sequential steps of the drier of the first embodiment of the present invention.

At length, in step S11, microcomputer 90a judges the chocking-up degree of the ventilating duct (comprising suction passage 20, exhaust passage 40 and blast pipe 50) of drier 1 according to preceding method.Therefore, microcomputer 90a obtains to connect dutycycle (for example, 0.70).Microcomputer 90a can carry out above-mentioned step S11 by the chocking-up degree inspection instruction of the ventilating duct of input block 9a input according to individual other control algolithm or by the user.Input block 9a can be installed on the interior section or rear surface of drier 1, rather than is installed on the control panel 9, makes the installation personnel of drier 1 can directly control and check input block 9a.

In step S12, microcomputer 90a judges whether the initial chocking-up degree of pre-stored exists.If initial chocking-up degree exists, then microcomputer 90a marches to step S14, otherwise microcomputer 90a marches to step S13.

In step S13, microcomputer 90a is set at initial chocking-up degree with the chocking-up degree of judging, and it is stored in the memory cell.As mentioned above, initial chocking-up degree becomes reference state.If do not judge initial chocking-up degree when drier 1 is carried out drying operation or in cleaning cotton linters filter 41 backs, then initial chocking-up degree is represented the chocking-up degree of blast pipe 50.

In step S14, microcomputer 90a calculates the difference between the chocking-up degree of the initial chocking-up degree of pre-stored and current judgement.Provide above-mentioned steps S14 with the progress of the chocking-up degree of inspection ventilating duct and the initial chocking-up degree of drying operation.In addition, if drier 1 is installed in the different spaces, then need to reset initial chocking-up degree.

In step S15, microcomputer 90a judges that whether the difference of calculating is corresponding to the initial difference reference in step S14.Provide initial difference with reference to judging reinstalling of drier 1, or the progress degree of the blocked state of blast pipe 50.When drier 1 was carried out drying operation, chocking-up degree increased.If the chocking-up degree of judging sharply increases (if the state of blast pipe 50 is becoming poor when front space or owing to wrong), or sharply reducing (changing) if the state of blast pipe 50 moves or repairs owing to the house, then above-mentioned step S15 need upgrade initial chocking-up degree.For example, when the connection dutycycle of initial chocking-up degree is 0.7, and the chocking-up degree of judging is 0.8 o'clock, if the initial difference reference settings is 4% o'clock of initial chocking-up degree, then initial difference is with reference to becoming 0.7 ± 0.028.Because difference is not corresponding to the initial difference reference, so microcomputer 90a marches to step S16.On the contrary, when the chocking-up degree of judging was 0.697, difference was corresponding to the initial difference reference, and then microcomputer 90a marches to step S17.The initial difference reference is the minimum reference that influenced by the state of blast pipe 50.If the chocking-up degree of cotton linters filter 41 reaches maximum, then it can influence the chocking-up degree of initial difference with reference to interior judgement.

In step S16, microcomputer 90a is stored in the chocking-up degree of judging in the memory cell as new initial chocking-up degree.In step S16, whether the initial chocking-up degree that microcomputer 90a also judges storage in addition is corresponding to the chocking-up degree of the blast pipe 50 of table 1.The difference of step S14 is represented the other chocking-up degree of blast pipe 50.If the chocking-up degree of judging sharply reduces from initial chocking-up degree, then the obstruction progress degree of this expression blast pipe 50 is serious.Wherein, microcomputer 90a can delete all chocking-up degrees except the initial chocking-up degree of up-to-date storage.

In step S17, the difference between the chocking-up degree of microcomputer 90a calculating storage in the end and the chocking-up degree of judgement.For example, if the chocking-up degree of last storage is 0.698, and the chocking-up degree of current judgement is 0.697, and then difference becomes 0.01.On behalf of the chocking-up degree of ventilating duct, this difference increase, and corresponding to the chocking-up degree of cotton linters filter 41.That is, the chocking-up degree of cotton linters filter 41 slowly increases, and the chocking-up degree of blast pipe 50 increases sharply.If the chocking-up degree of whole ventilating duct slowly increases, then can cause by the obstruction of cotton linters filter 41, and if the chocking-up degree of whole ventilating duct increases fast, then can cause by the obstruction of blast pipe 50.

In step S18, microcomputer 90a can show difference on display unit 9b, with the chocking-up degree increase of notice cotton linters filter 41.

In step S19, microcomputer 90a is stored in the chocking-up degree of judging in the memory cell.If the chocking-up degree of being stored except initial chocking-up degree outnumber five, then microcomputer 90a can delete chocking-up degree at most.In addition, microcomputer 90a can be stored as difference the chocking-up degree of cotton linters filter 41.

In step S20, microcomputer 90a shows initial chocking-up degree on display unit 9b.If program comes from step S13 and S16, then microcomputer 90a can show that initial chocking-up degree is as chocking-up degree as shown in table 1 or blocking portion.

Microcomputer 90a passes through step S12 and S13 and step S12, S14, S15 and S16 and checks the chocking-up degree of blast pipe 50 or stop up the progress degree, and checks the chocking-up degree or the obstruction progress degree of cotton linters filter 41 by step S12, S14, S15 and S17.Therefore, microcomputer 90a can be on display unit 9b simultaneously or alternately show the chocking-up degree of blast pipe 50 and cotton linters filter 41.

In step S17 and S18, when microcomputer 90a had the chocking-up degree of the initial chocking-up degree and first judgement, the difference between the chocking-up degree of initial chocking-up degree and judgement was represented the chocking-up degree of cotton linters filter 41.Thereafter, when microcomputer 90a obtained the chocking-up degree of second judgement, the difference between first chocking-up degree and second chocking-up degree was corresponding to the other chocking-up degree of cotton linters filter 41.Like this, microcomputer 90a checks the obstruction progress degree of cotton linters filter 41 by each difference.The summation of difference is represented the current chocking-up degree of cotton linters filter 41.

In above-mentioned flow chart, the chocking-up degree of the chocking-up degree of microcomputer 90a independent check blast pipe 50 or obstruction progress degree and cotton linters filter 41 or obstruction progress degree.

Figure 14 is the flow chart of sequential steps that the choke detecting method of drier according to a second embodiment of the present invention is shown.

Step S31 is identical with the step S11 of Figure 13.

In step S32, whether the chocking-up degree that microcomputer 90a judge to judge is corresponding to the obstruction reference of blast pipe 50.According to the chocking-up degree reference of the blast pipe in table 1 50, when the connection dutycycle is lower than 0.4, can think that blast pipe 50 stops up.Therefore, if the chocking-up degree of judging corresponding to the chocking-up degree reference, then microcomputer 90a marches to step S33, otherwise microcomputer 90a marches to step S34.

In step S33, microcomputer 90a judges that blast pipe 50 is blocked, and shows that on display unit 9b blast pipe 50 stops up.

In step S34, microcomputer 90a calculates the difference between the chocking-up degree of initial chocking-up degree and judgement.For example, if the connection dutycycle of initial chocking-up degree is 0.7, and the chocking-up degree of judging is 0.67, and then difference becomes 0.03.If the chocking-up degree of judging is 0.61, then difference becomes 0.09.

In step S35, whether the difference that microcomputer 90a judge to calculate is corresponding to the obstruction reference of cotton linters filter 41.For example, if the obstruction of cotton linters filter 41 reference is a difference greater than 0.07, then the difference of calculating at step S34 0.03 does not have corresponding to the obstruction reference, and microcomputer 90a marches to step S37 thus.Simultaneously, the difference of calculating at step S34 0.09 is corresponding to stopping up reference, and microcomputer 90a marches to step S36 thus.

In step S36, microcomputer 90a judges that cotton linters filter 41 has stopped up, and shows that on display unit 9b cotton linters filter 41 stops up.

In step S37, microcomputer 90a is stored in the chocking-up degree of judging in the memory cell.Wherein, microcomputer 90a can show the normal condition of ventilating duct on display unit 9b.

In Figure 14, microcomputer 90a can notify the user with the obstruction of blast pipe 50, the obstruction of cotton linters filter 41 or the normal condition of ventilating duct according to the chocking-up degree of judging.

Figure 15 is the flow chart of sequential steps of choke detecting method that the drier of a third embodiment in accordance with the invention is shown.

At length, in step S41, microcomputer 90a checks that whether the state-detection instruction of blast pipe 50 is by input block 9a input.If imported the state-detection instruction, then microcomputer 90a marches to step S42, otherwise microcomputer 90a stops this program.In this step S41, if the instruction of the state-detection of storage exists, then microcomputer 90a marches to step S42.

In step S42, microcomputer 90a storage is by the temperature T s of the ventilating duct of temperature sensor 82a sensing.

In step S43, microcomputer 90a is by driving the drying operation that heater 30 and motor 72 start drier 1.

In step S44, microcomputer 90a checks whether the stipulated time (for example, 1 minute 30 seconds) of state-detection is over and done with.That is, microcomputer 90a execution drying operation reaches the stipulated time of this step S44 at least.

In step S45, microcomputer 90a obtains the temperature T e of the ventilating duct of temperature sensor 82a sensing.

In step S46, microcomputer 90a makes comparisons difference between temperature T e and the Ts and temperature reference Tr.Temperature reference Tr is a unique value of judging that blast pipe 50 stops up.If difference is littler than temperature reference Tr, then microcomputer 90a marches to step S47, otherwise microcomputer 90a marches to step S48.

In step S47, because temperature T e has stopped up and shows on display unit 9b so microcomputer 90a judges blast pipe 50 because the obstruction of blast pipe 50 raises from the temperature T s that is lower than temperature reference Tr.For example, if temperature T s is 20 ℃, and temperature reference Tr is 12 ℃, and then temperature T e does not reach 32 ℃.

In step S48, elevated temperature is with reference to Tr at least because temperature T e is because the obstruction of blast pipe 50 is from temperature T s, so microcomputer 90a judges that blast pipe 50 is normalities, and demonstration blast pipe 50 is a normality on display unit 9b.For example, if temperature T s is 20 ℃, and temperature reference Tr is 12 ℃, and then temperature T e is above 32 ℃.

In the step S42 and S45 of said temperature sensing, actual temperature can impose on microcomputer 90a from temperature sensor 82a.In another case, when microcomputer 90a and temperature sensor 82a electrical connection, and temperature sensor 82a is because temperature when different resistance values is arranged, if predetermined case (identical voltage, same current etc.) imposes on temperature sensor unit 82, the resistance value that microcomputer 90a can accounting temperature sensor 82a then, and sign is corresponding to the temperature of resistance value.

In above-mentioned flow chart, when drier 1 is installed first because the house moves or is installed once more, for blocked state and the chocking-up degree of only checking drying operation blast pipe 50, can between step S44 and S45, increase microcomputer 90a drying operation stop step.

Figure 16 is the flow chart of sequential steps of choke detecting method that the drier of a fourth embodiment in accordance with the invention is shown.

After drying operation, the obstruction of cotton linters filter 41 less influences temperature than the obstruction of blast pipe 50.That is, be used to judge that the temperature reference Tr2 of obstruction of blast pipe 50 is bigger than the temperature reference Tr1 of the obstruction that is used to judge cotton linters filter 41.Therefore, temperature reference Tr can be stored as a plurality of values, is used to identify the obstruction of cotton linters filter 41 and the obstruction of blast pipe 50.The flow chart of Figure 16 reflects this characteristic.

At length, in step S81, microcomputer 90a checks that whether the state-detection instruction of ventilating duct is by input block 9a input.If imported the state-detection instruction, then microcomputer 90a marches to step S82, otherwise microcomputer 90a stops this program.In this step S81, if the instruction of the state-detection of storage exists, then microcomputer 90a marches to step S82.

Step S82 to S85 is identical with the step S42 to S45 of Figure 15.

In step S86, microcomputer 90a makes comparisons difference between temperature T e and the Ts and temperature reference Tr1.Temperature reference Tr1 is the value that is used to judge the obstruction of blast pipe 50.If difference is littler than temperature reference Tr1, then microcomputer 90a marches to step S87, otherwise microcomputer 90a marches to step S88.

Step S87 is identical with the step S47 of Figure 15.

In step S88, microcomputer 90a makes comparisons difference between C.T Te and the Ts and temperature reference Tr2.Temperature reference Tr2 is the value that is used to judge the obstruction of cotton linters filter 41.If difference is littler than temperature reference Tr2, then microcomputer 90a marches to step S89, otherwise microcomputer 90a marches to step S90.

In step S89, microcomputer 90a judges that the part of the obstruction of ventilating duct is a cotton linters filter 41, and shows that cotton linters filter 41 stops up.

In step S90, microcomputer 90a judges the part that does not have obstruction on ventilating duct, and shows the ventilating duct normal condition.

For example, when temperature reference Tr1 is 12 ℃, and temperature reference Tr2 is when being 20 ℃, if the difference of calculating in step S86 is littler than temperature reference Tr1, then microcomputer 90a judges that blast pipe 50 stops up, if difference is bigger than temperature reference Tr1, but it is littler than temperature reference Tr2, then microcomputer 90a judges that cotton linters filter 41 stops up, and if difference is bigger than temperature reference Tr2, then microcomputer 90a judges the ventilating duct normal condition.

In above-mentioned steps, microcomputer 90a is stored in the difference between temperature T e and the Ts.Microcomputer 90a judges the obstruction progress degree of ventilating duct by comparing difference.Usually, difference reduces by the drying operation repeatedly of drier 1.For example, if the difference of last storage is 24 ℃, and the difference of current sensing is 22 ℃, and then the difference of Jian Shaoing can cause the obstruction progress of cotton linters filter 41.

Figure 17 to 19 is illustration schematic diagrames according to the demonstration example in the choke detecting method of the present invention.

As shown in figure 17, microcomputer 90a makes comparisons chocking-up degree and the table 1 judged, and shows chocking-up degree (blocked state of cotton linters filter 41) and blocking portion by accompanying drawing and character on display unit 9b.

As shown in figure 18, display unit 9b shows chocking-up degree by calcspar and character, also shows the part of stopping up by character.

As shown in figure 19, display unit 9b shows chocking-up degree (cut-out dutycycle) and the part of stopping up with the character demonstration with percentage (%).Wherein, chocking-up degree can be expressed as and multiply by the percentage of ' 100 ' with cutting off dutycycle.If the cut-out dutycycle of ventilating duct is 0.7, represent that then 70% stops up, it stops up corresponding to blast pipe 50.

In addition, display unit 9b can inform the user with chocking-up degree and blocking portion by sound or alarm.

Figure 20 to 23 is illustration schematic diagrames according to the other demonstration example in the choke detecting method of the present invention.

With reference to Figure 20, microcomputer 90a shows the chocking-up degree as the blast pipe 50 of the initial chocking-up degree of setting in step S13 and S47, and simultaneously or alternately show the blocked state or the chocking-up degree of cotton linters filter 41.Figure 20 illustrates a kind of state, and wherein drier 1 at first is connected to blast pipe 50 and handles with choke detecting method.Cotton linters filter 41 does not have blocked at all.

Figure 21 illustrates a kind of state, and wherein the chocking-up degree of blast pipe 50 is because drying operation, the house moves or at step S16, the obstruction of the blast pipe 50 among S32 or the S87 and increasing fast from the chocking-up degree of Figure 20.In Figure 21, if the state of blast pipe 50 reaches "  ", then microcomputer 90a judges that the current chocking-up degree of blast pipe 50 reaches critical stage, and shows the obstruction warning message (or cleaning information) of blast pipe 50 by display unit 9b vision or sense of hearing ground.For example, the state of the blast pipe 50 of demonstration flashes to attract user's attention.

Figure 22 illustrates a kind of state, and wherein the chocking-up degree of cotton linters filter 4 is because drying operation and slowly increasing from the chocking-up degree of Figure 20.If the state of cotton linters filter 41 reaches "  ", then microcomputer 90a judges that the current chocking-up degree of cotton linters filter 41 reaches critical stage, and shows the obstruction warning message (or cleaning information) of cotton linters filter 41 by display unit 9b vision or sense of hearing ground.For example, the state of the cotton linters filter 41 of demonstration flashes to attract user's attention.

Figure 23 illustrates by cleaning or the state variation of the blast pipe 50 that the house moves and the state variation by the cotton linters filter 41 that cleans among Figure 22.

As discussed,, have the chocking-up degree that the oven dry detection method of stopping up the drier that detects and being used for drier can accurately be judged ventilating duct, make user and installation personnel be easy to handle the obstruction of ventilating duct according to the present invention.

In addition, the oven dry detection method that has the drier that stop up to detect and be used for drier by checking ventilating duct chocking-up degree and the information of blocking portion, the current state of ventilating duct is shown to the user.

The oven dry detection method that has the drier that stop up to detect and be used for drier can or provide the block information of ventilating duct according to the execution of drying operation such as the environmental change that the house moves or cleans.Therefore, the user always is apprised of the current state of ventilating duct.

And the control panel of drier makes it possible to the block information by user's instruction checking and demonstration ventilating duct.Therefore, the user can use the service of the chocking-up degree of checking ventilating duct expediently.

Though described the preferred embodiments of the present invention; but be appreciated that the present invention and should not be limited to these preferred embodiments, but those skilled in the art can carry out various variation and modification to it in the spirit and scope that the present invention asks for protection subsequently.

Claims

1. drier with clogging detecting function comprises:

Judging unit is used to judge the chocking-up degree of ventilating duct;

Memory cell, the chocking-up degree that is used to store ventilating duct; And

Display unit is used for chocking-up degree is shown to the user.

2. drier according to claim 1, wherein said display unit shows chocking-up degree with at least two stages.

3. drier according to claim 2, wherein, when chocking-up degree is in critical stage, described display unit warning.

4. drier according to claim 1, wherein said display unit shows chocking-up degree with vision or audible means.

5. drier according to claim 1, wherein said display unit shows the chocking-up degree of cotton linters filter and the chocking-up degree of blast pipe.

6. drier according to claim 1 comprises input block, is used for according to the decision operation that starts judging unit from user's decision instruction.

7. drier according to claim 1 comprises:

Operating unit is used for carrying out drying operation on ventilating duct; And

Stop element is used for the drying operation of shut-down operation unit.

8. drier according to claim 7, wherein said stop element blocks the power supply of supplying with operating unit, and described judging unit comprises detecting unit, be used to detect connection/cut-out by the drying operation of stop element, and control module, be used for the chocking-up degree of the definite ventilating duct of connection/cut-outs of the drying operation that detects according to detecting unit.

9. drier according to claim 8 comprises the connecting line that is used for described detecting unit is connected to operating unit or stop element.

10. drier according to claim 8, wherein said judging unit is recently checked the chocking-up degree of ventilating duct by the connection/cut-out duty that calculates drying operation.

11. drier according to claim 7, wherein said stop element is sent to operating unit according to the temperature of ventilating duct with the closing control instruction, and described judging unit is judged the chocking-up degree of ventilating duct according to connection/cut-out of the drying operation that passes through stop element.

12. drier according to claim 11, wherein said judging unit are checked the chocking-up degree of ventilating duct by connection/cut-out dutycycle of calculating drying operation.

13. drier according to claim 8, wherein said control module are determined the chocking-up degree of ventilating duct according to the point first break time of the drying operation that passes through stop element.

14. drier according to claim 1, comprise operating unit, be used on ventilating duct, carrying out drying operation, wherein said judging unit comprises temperature sensing unit that is used for sensing ventilating duct temperature and the control module that is used for determining according to the variations in temperature that temperature sensing unit senses the chocking-up degree of ventilating duct.

15. drier according to claim 1 also comprises comparing unit, the chocking-up degree that is used for judging is made comparisons with at least one pre-stored chocking-up degree of ventilating duct, wherein said display unit demonstration comparative result.

16. drier according to claim 15, it comprises the initial state setup unit, be used for when the difference between the initial chocking-up degree of the chocking-up degree of chocking-up degree of judging and pre-stored does not correspond to the initial difference term of reference of the comparative result of unit as a comparison, the chocking-up degree of judging being set at initial chocking-up degree.

17. drier according to claim 1 comprises the initial state setup unit, is used for when the chocking-up degree of pre-stored does not exist, and the chocking-up degree of judging is set at initial chocking-up degree.

18. drier according to claim 18, wherein said initial chocking-up degree are the chocking-up degrees of blast pipe.

19. drier according to claim 15 comprises setup unit, is used for the comparative result of the comparing unit between the chocking-up degree of chocking-up degree of judging and last storage is set at the chocking-up degree of cotton linters filter or stops up the progress degree.

20. obstruction checkout gear according to claim 1 comprises:

First comparing unit, the chocking-up degree that is used for judging is made comparisons with the obstruction reference of blast pipe; And

Second comparing unit is used for obstruction with difference between the chocking-up degree of the chocking-up degree of pre-stored and judgement and cotton linters filter with reference to making comparisons.

21. obstruction checkout gear according to claim 20 comprises display unit, is used for showing the obstruction of blast pipe or the obstruction of cotton linters filter according to the comparative result of first comparing unit or second comparing unit.

22. the control panel of a drier comprises:

Input block is used to obtain the judgement request from the chocking-up degree of user's ventilating duct; And

Display unit is used for according to judging that request shows the chocking-up degree of ventilating duct.

23. control panel according to claim 22, wherein said display unit shows chocking-up degree with vision or audible means.

24. control panel according to claim 22, wherein said display unit shows chocking-up degree with at least two stages.

25. control panel according to claim 24, wherein, when chocking-up degree is in critical stage, described display unit warning.

26. control panel according to claim 22, wherein said display unit shows the chocking-up degree of cotton linters filter and the chocking-up degree of blast pipe.

27. the choke detecting method of a drier comprises:

Judge the step of the chocking-up degree of ventilating duct;

When initial chocking-up degree during by pre-stored, the step that the chocking-up degree judged and initial chocking-up degree are made comparisons, and when the difference between chocking-up degree of judging and the initial chocking-up degree does not correspond to result's as a comparison initial difference term of reference, the chocking-up degree of judging is stored as first storing step of new initial chocking-up degree; And

When initial chocking-up degree is not stored, the chocking-up degree of judging is stored as second storing step of initial chocking-up degree.

28. choke detecting method according to claim 27 comprises the step that shows initial chocking-up degree.

29. choke detecting method according to claim 27, wherein said initial chocking-up degree are the chocking-up degrees of blast pipe, and difference is the obstruction progress degree of blast pipe.

30. choke detecting method according to claim 27 comprises the 3rd storing step, is used for when the difference between chocking-up degree of judging and the initial chocking-up degree during corresponding to result's as a comparison initial difference term of reference the chocking-up degree that storage is judged.

31. choke detecting method according to claim 27 comprises the step that shows difference, is used for showing difference when the difference between chocking-up degree of judging and the initial chocking-up degree during corresponding to result's as a comparison initial difference term of reference.

32. choke detecting method according to claim 31, wherein said difference are the obstruction progress degree of cotton linters filter, and the summation of difference is the chocking-up degree of cotton linters filter.

33. the choke detecting method of a drier comprises:

Judge the step of the chocking-up degree of ventilating duct;

With the obstruction of the blast pipe of chocking-up degree and pre-stored with reference to the step of making comparisons; And

When the chocking-up degree in comparison step corresponding to the obstruction of blast pipe with reference to the time, show the step of the obstruction of blast pipe.

34. choke detecting method according to claim 33 comprises:

When the chocking-up degree in comparison step not corresponding to the obstruction of blast pipe with reference to the time, second comparison step that the difference between the chocking-up degree of the chocking-up degree judged and last storage and the obstruction reference of cotton linters filter are made comparisons; And

When the difference in second comparison step corresponding to the obstruction of cotton linters filter with reference to the time, show the step of the obstruction of cotton linters filter.

35. choke detecting method according to claim 34, comprise when the difference in second comparison step not corresponding to the obstruction of cotton linters filter with reference to the time, the step of the chocking-up degree that storage is judged.