CN101187625B

CN101187625B - Device and method for detecting clothes drier belt breaking

Info

Publication number: CN101187625B
Application number: CN2007103051217A
Authority: CN
Inventors: 俞惠璟; 李俊锡; 高锡浩
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2006-10-02
Filing date: 2007-09-29
Publication date: 2012-02-22
Anticipated expiration: 2027-09-29
Also published as: CN101187625A; KR100751131B1

Abstract

The invention discloses a device for detecting the belt fracture of a dryer, which comprises a drying barrel roll for containing clothing, an electric motor for applying rotary force to the drying barrel roll, a belt winding at the drying barrel roll and the rotating axel of the electric motor and a belt fracture detecting unit arranged near the electric motor for detecting the belt fracture. Wherein, when the belt breaks, the belt fracture detecting unit is pressed and rotated along the electric motor through the torque function.

Description

Be used to detect the device and method of the band fracture of dryer

Technical field

The present invention relates to a kind of device and method that is used to detect the fracture of dryer band.

Background technology

Carry out drying process when usually, design rotary drum type dryer is loaded in the clothing in the dry drum with rotation.Clothing rotates through the rotation of dry drum and descends.The high temperature drying air and the clothing that are incorporated in the dry drum are mixed with the moisture on the evaporation clothing.Dryer can be divided into condensing type laundry dryer and exhaust type clothes dryer.After being sent to condenser and well heater and combustion with the air in the dry drum, the former gets back to dry drum thereby design.That is to say that air circulates and is not discharged to outside the dryer in dryer.Thereby the design latter is sent to condenser with the air in the dry drum and makes it possible to eliminate the moisture that contains in the air and then it is discharged to outside the dryer.

Special, according to condensing type laundry dryer, the clothing of round-robin air from be loaded in dry drum absorbs moisture and passes through condenser to reduce its temperature through heat interchange in dryer.When the temperature of air reduces, be included in airborne humidity condensed.The outside is extracted and be discharged into to condensate water out by condenser pump.

On the other hand, according to exhaust type clothes dryer, the hot and humid air that the clothing in dry drum absorbs moisture is discharged into outside the dryer through line bits filtrator.

In exhaust type clothes dryer and condensing type laundry dryer, when clothing because the rotation of dry drum promotes and when descending, the heat interchange of high temperature drying air and locker room is very abundant.

Simultaneously, according to traditional rotary drum type dryer, the drum band is wrapped in the periphery of drum, and dry drum band is wound on the motor reel simultaneously, and therefore dry drum rotates through the rotating force of motor.

Summary of the invention

One object of the present invention is to provide a kind of device and method that is used to detect the band fracture of dryer.

Concrete; One object of the present invention is to provide a kind of device and method that is used to detect the band fracture of dryer; When it ruptures when drum band in dry run,, prevent to be placed on some clothing local heatings and burning in the drum through stopping the operation of motor and well heater.

In addition, another object of the present invention is to provide a kind of device and method that is used to detect the fracture of dryer band, and it through stopping the operation of motor and well heater, reduces unnecessary energy consumption when the band fracture.

In order to realize these purposes and other advantage and according to target of the present invention, like practical implementation here and broadly described, a kind of device that is used to detect the fracture of dryer band is provided, comprising: the dry drum of accommodating laundry wherein; Rotating force is imposed on the motor of drum; Be wrapped in the axial band of rotation of drum and motor; And be located near the motor to detect the band fracture detecting unit of band fracture, wherein when the band fracture,, be with the detecting unit that ruptures to be pressed along with motor rotates through torque.

In another aspect of this invention, a kind of device that is used to detect the fracture of dryer band is provided, comprises: dry drum; The tumble dried drum also is provided with from the motor of one of periphery side-prominent press element; Support the spring of motor; Be wrapped in the axial band of rotation of dry drum and motor; And the microswitch that when the band fracture, contacts with press element.

In addition,, a kind of method that is used to detect the fracture of dryer band is provided, comprises: tumble dried drum through the input action command for realizing these purposes and other advantage; Owing to band fracture detecting unit is opened in the band fracture that is wrapped on the dry drum; And when band fracture detecting unit is opened, stop well heater and motor.

In the present invention on the other hand, a kind of method that is used to detect the fracture of dryer band is provided, wherein through when motor self rotates by the rupture fracture of the band that the action of motor of detecting unit confirms dry drum is linked to each other with motor of pressure zone.

Description of drawings

Fig. 1 has the viewgraph of cross-section that is used to detect the dryer of being with the device that ruptures according to the preferred embodiment of the invention.

Fig. 2 is the skeleton view that the dryer inner structure is shown.

Fig. 3 is the external perspective view that is installed in the motor in the dryer according to the preferred embodiment of the invention.

Fig. 4 is the front elevation that the motor posterior bracket is shown.

Fig. 5 is the side view that the state of motor under the normal condition is shown.

Fig. 6 is the side view that the state of motor when the band fracture takes place is shown.

Fig. 7 is the figure that the radiating element profile of intervening between the base that is used to prevent motor and the press element is shown.

Fig. 8 is the figure that the distribution of the power on the motor that is applied to according to the preferred embodiment of the invention in the dryer is shown.

Fig. 9 is the block diagram that the system architecture of the control method that is used to carry out the band fracture that detects dryer according to the preferred embodiment of the invention is shown.

Figure 10 is the process flow diagram that the control method of the band fracture that detects dryer according to the preferred embodiment of the invention is shown.

Embodiment

Hereinafter, will be elaborated to the present invention according to Figure of description.Yet, the invention is not restricted to following examples, but under the situation that does not depart from the scope of the invention, through adding, replacing and delete other part and can make multiple variation or change.

Fig. 1 is that expression has the viewgraph of cross-section that is used to detect the dryer of being with the device that ruptures according to the preferred embodiment of the invention, and Fig. 2 is the skeleton view of expression dryer inner structure.

With reference to Fig. 1 and 2, have to be used to according to the preferred embodiment of the invention detect and be with the dryer of the device that ruptures to comprise: the casing 11 that forms exterior contour; Be installed in the dry drum 12 in the casing 11, clothing is loaded in this drying drum 11; Be installed in the preceding frame 20 of casing 11 front portions; The rear portion that former frame 20 is installed is with the protecgulum 21 of the open front of supporting dry drum 12; The top of frame 20 is so that the user imports the control panel 22 of drying condition before being positioned at; Be installed in the base 23 of the below of dry drum 12; The door 13 in the place ahead of frame 20 before rotating being installed on; The motor 30 of the power that when being positioned at a upside of base 23, rotates.

Special, a door line bits filtrator 131 that is used for filtering fine hair is arranged on door 13, and circulation pipe 15 is arranged under the door 13.And the body line bits filtrator 151 that is used for filtering fine hair is arranged on the inlet of circulation pipe 15.And the cooling fan 16 that is used to suck extraneous air is installed in the base 23 with the drying fan 18 that is used to suck to the circulating air of the place ahead of dry drum 12 discharging.Here, cooling fan 16 all links to each other with the motor reel 31 of motor 30 when positioned opposite to each other with drying fan 18.And, be with 17 simultaneously around motor reel 31 around the periphery of drum 12 with 17.Therefore, when rotating owing to the rotation of motor reel 31 with 17, dry drum 12 rotates thereupon.

In addition, drying tube 19 is arranged on the outside of casing 11, i.e. the back surface of dryer 10.Special, drying fan 18 is contained in the bottom of drying tube 19, and the top of drying tube 19 links to each other with the rear portion of dry drum 12.And well heater 14 is arranged in the drying tube 19 through producing heat of high temperature circulating air is heated.And the rear portion of dry drum 12 links to each other with casing 11 through drum axle 121, and then supports dry drum 12.

In addition, cooling fan 16 is positioned at base 23 inside, and circulating air pipe and cooling tube are located in the base 23.And condenser is located at the point of crossing of circulating air pipe and cooling tube.

In addition, the radiating element 231 that is provided with a plurality of holes is formed on the parts that motor 30 is set, and the heat of motor generation can scatter and disappear soon like this.And motor 30 is connected to base 23 through spring 40, is used to detect a side that is arranged on base 23 with the microswitch 50 of 17 fracture.Here, be with 17 to link to each other, therefore, produce torque at motor 30 places along the direction of spring 40 elongations with motor reel 31.Thereby connect spring 40 compensating torques and prevent that motor 30 from rotating through this torque.This will be elaborated according to accompanying drawing.

The operation that description is had the condensation type dryer 10 of above structure.

At first, motor 30 and well heater 14 start through the input action command after dry drum 12 loads the article that need drying.Afterwards, along with the drying fan that is connected to motor 30 18 drive air are incorporated into dry drum 12.And, drum 12 when link to each other with rotary electric machine 31 be with 17 to rotate the time rotate.And room air is introduced through the cooling tube that in base, forms by the rotation of cooling fan 16.And, when through condenser, under the situation of not mixing, carry out heat interchange each other with the room air of introducing through cooling tube along the circulating current of circulating air pipe.And circulating air is incorporated in the drying tube 19 after the heat interchange, and through being incorporated into once more in the dry drum 12 after 14 heating of the well heater in the drying tube 19.And the intact room air of heat interchange is discharged to indoor.This air-flow more specifically is described, the air in the dry drum 12 circulates through the rotation of drying fan 18.And room air is sucked by cooling fan 16 and is being discharged to indoor later on through condenser.And round-robin circulating airs and the room air that sucks through cooling fan 16 during through condenser, are carrying out heat interchange with staggered mode in the dry drum 12 under immiscible situation.And circulating air piles up in condenser and with the mode of intersecting through layer alternated through layer and room air, therefore, and the heat interchange and not mixing each other each other of two kinds of air.

Simultaneously, when with 17 process cleaved at tumble dried drum 12, motor 30 promotes microswitch 50 when the elastic force through spring 40 rotates.The structure of pushing microswitch 50 here, is formed on the periphery of motor 30.Below, be used to detect with 17 fractures structure constantly and will describe in detail according to accompanying drawing.

Fig. 3 illustrates the external perspective view that is installed in the motor on the dryer according to the preferred embodiment of the invention, and Fig. 4 illustrates the front elevation of the posterior bracket that constitutes motor.

With reference to Fig. 3, motor 30 comprises support of motor 34 according to the preferred embodiment of the invention, stator 32; Be arranged on the rotor (not shown) to rotate in the stator 32; Be connected to the motor reel 31 of rotor, and, be with 17 to be attached thereto from the belt wheel 33 that support of motor 34 peripheries extend out to rotate.

Special, support of motor 34 comprises around the anterior fore-stock 35 of stator 32, and around the after-poppet 36 at stator 32 rear portions.And fore-stock 35 is provided with belt wheel 33, and with the coupled spring link 351 that connects of spring 40 1 ends.

In addition, the press element 37 that is used for pushing microswitch 50 is arranged on after-poppet 36.Side with 17 is tightly around belt wheel 33, and with 17 opposite side tightly around dry drum 12.And, be the same side with a side around dry drum 12 around a side of motor reel 31.That is to say, be with 17 to become serpentine with belt wheel 33 is connected with motor reel 31.

With reference to Fig. 4, the motor reel through hole 361 that motor reel 31 penetrates is formed on the center of after-poppet 36, and press element 37 is formed on excircle.

Special, press element 37 forms with the shape outstanding from the marginal portion of after-poppet 36.With this structure, motor 30 itself itself rotates around motor reel 31 when being with 17 fractures.And press element 37 promotes microswitch 50 when motor 30 rotates.Here, when with 17 when fracture rotating motor 30 power be the moment that the elastic force of the initial position through spring 40 being returned to it produces.

More particularly; Press element 37 is by with the first crooked bend 371 of specific curvature, is that the peak of press element 37 is formed with crooked second bend 373 of specific curvature and at the tip 372 that this first bend 371 converts second bend 373 at first bend, 371 ends.

Here, the curvature of ratio of curvature second bend 373 of first bend 371 is big.That is to say that first bend 371 is slight bending, the rapider bending of second bend, 373 to the first bends 371.

First bend, 371 slight bending are being with 17 elements 37 that are not pressed in the fracture to push to prevent microswitch 50.Special, motor 30 can squint in its eccentric throw because of motor 30 vibrations or drum own in 17 rotation process.And, because vibration and eccentricity motor 30 itself may rotate in a certain specific angular range.Like this, thus first bend, 371 slight bending prevent press element 37 pushes microswitch 50.Therefore, even just can prevent under the situation that band does not have to rupture, to detect by error the band fracture.

In addition, the end formation at first bend 371 is damaged to prevent microswitch with the second crooked bend 373 of specific curvature.

Especially, as shown in Figure 7, when motor 30 was arranged on the base through the assembler, press element 37 often was disposed at the below of microswitch 50.In this case, assembler's rotating motor is with the position of correction motor 30, so microswitch possibly damage owing to the element 37 that is pressed tangles when motor 30 rotates.In order to prevent this problem, second bend 373 is with a specific curvature bending, therefore, can not prevent that microswitch 50 from damaging when motor is correct when installing.

In addition, when motor 30 passed through the elastic force generation torque of spring 40 because band ruptures, most advanced and sophisticated 372 preferably were arranged near the point of pushing microswitch 50.Special, most advanced and sophisticated 372 position is by determining corresponding to the amount of spin of the point that extends from spring 40 to the motor 30 of the air line distance the starting point of spring.In other words, amount of spin is corresponding to the length of the circular arc that extends to tip 372 from microswitch.To specify according to accompanying drawing below.

Fig. 5 representes the state of motor under the normal condition.Fig. 6 representes the state of motor when the band fracture takes place.

With reference to Fig. 5, press element 37 through be in be connected with motor reel 31 with 17 do not have the fracture state under the tractive force with 17 be disposed at microswitch 50 above.

Here, contact 52 is outstanding from the upper surface of microswitch 50, and contact 51 extends above contact 52.Contact 51 keeps apart with contact 52.

With reference to Fig. 6, the restoring force motor 30 through spring 40 when with 17 fractures rotates counterclockwise from described state.And press element 37 rotates counterclockwise equally, and press element 37 contacts with contact 52 with the order at tip 372 like this.And, push contact 51 through press element 37, so contact 51 contact contacts 52.And microswitch 50 is opened when contact 51 contact contacts 52, thereby, produce pulse.And this pulse signal is delivered to control module, and control module is judged the band fracture.

Fig. 7 representes to prevent the profile of radiating element of base and the intervention between the press element of motor.

With reference to Fig. 7, press element 37 is outstanding from the circumference of after-poppet 36.Therefore, when press element 37 rotated under the radiating element 231 of base 23 is flat situation, press element 37 possibly intervened with radiating element 231 mutually.

For prevent this maybe, radiating element 231 predetermined depth of sagging.Special, radiating element 231 is preferably with the curvature bending of the curvature that is equal to or greater than the circle that when rotate at the tip 372 of press element 37, marks.

More particularly, because the elastic force that spring 40 stores when rotating, press element 37 maybe be because the inertial force of motor 30 deadweight generations slip over microswitch 50 when motor 30.Yet because the assembling of the mistake of assembler's mistake assembling, press element 37 is assembled to the lower side of microswitch 50.In this case, thus radiating element 231 at predetermined degree of depth place the crooked radiating element 231 nonintervention press elements 37 that make.

Fig. 8 representes to be applied to the distribution of the power of the motor portion on the dryer according to the preferred embodiment of the invention.

With reference to Fig. 8, after the periphery of contact belt wheel 33, be in shape around motor reel 31 with 17.

Especially, owing to be with 17 to be wrapped in tightly on the dry drum 12, so be applied on the belt wheel 33 with 17 tension force.That is the power F1 effect of, pressing pinch roller 33 is on it.

Simultaneously, spring 40 is the compression springs with predetermined elasticity modulus, when it is connected with motor, is stretched and keeps this state.Therefore, on the elastic force F2 effect spring 40 of recovery springs original state.

About motor, tend to put on the motor 30 through the power F1 that acts on the belt wheel, and amount of torque M1 is F1*R1 (R1: the motor radius) with the torque M 1 of counterclockwise rotating.

In addition, the torque M of tending to rotate in a clockwise direction 2 puts on the motor 30 through the elastic force F2 of spring 40, and amount of torque M2 is F2*R2 (R2: the length between motor center and the spring link).And these two amount of torque are identical, and therefore, it is static that motor keeps.

Here, disappear owing to when with 17 fractures, be applied to the torque M 1 of belt wheel, so motor 30 clockwise rotates under the effect of the torque M 2 that is produced by spring 40.Therefore, it pushes the contact 51 of microswitch 50 when press element 37 rotates.

Simultaneously, the corner Θ of motor 30 is the corresponding angles of straight length B that reduce from extended length A to initial length C with spring 40.

That is l=R2* Θ.

The place that microswitch 50 possibly pushed in tip 372 when in addition, most advanced and sophisticated 372 formation position was formed under with 17 states that not have to rupture motor 30 rotational angle Θ.

Fig. 9 is the block diagram of system architecture of representing to be used to according to the preferred embodiment of the invention to implement to detect the control method of dryer band fracture.

With reference to Fig. 9; The dryer system that is used to carry out the control method that detects the band fracture according to the present invention comprises control module 400; The key-press input unit 410 of input drying condition and operational order; Be used for according to the drying condition driving motor of input and the driver element 440 of well heater, be used to detect the band fracture detecting unit 430 and storage memory of data 420 of band fracture.

Especially, band fracture detecting unit 430 is exactly above-mentioned microswitch 50.

According to this structure, when motor 30 rotated, in the moment that band fracture detecting unit 430 detects with 17 fractures, detection signal was transported to control module 400.And control module 400 stops motor and well heater through transmitting the control signal order, and control signal stops the operation of driver element 440 through judging signal.

Below, will detect the control method that band ruptures according to the process flow diagram specific explanations.

Figure 10 is the process flow diagram of control method that detects the band fracture of dryer according to the preferred embodiment of the invention.

With reference to Figure 10, the user is through action button (S110) input drying condition and operational order.According to drying condition and operational order driving motor and tumble dried drum.

In addition, control module 400 confirms whether produce the band break signal in the dry run.In other words, whether its definite band fracture detecting unit is opened or is not real-time.Here, " band fracture detecting unit is opened " is meant and when press element 37 is pushed microswitch 50, produces electric signal.

Simultaneously, when not receiving the signal of band fracture detecting unit unlatching in the control module, carry out according to the drying condition dry run of input.Because the operation of dryer stops when whether finishing the dry run end of (S200) back in definite dry run, so dry run finishes.And under the situation that does not have to finish in dry run, dry drum is rotated further (S120), and confirms that the operation (S130) whether band fracture detecting unit is opened continues operation.

Yet well heater and motor stop simultaneously when control module receives the signal of band fracture detecting unit unlatching.Even motor and well heater work on if receive the band break signal, then will cause possibility of fire because the perhaps overheated dry drum of overheated well heater is overheated.

In addition, when motor with well heater stops and rotating (S160) through the forwards/reverse that preset time repeats motor when (S150).And, detect band fracture detecting unit once more and whether open (S170).The not fracture of band even this is, the signal that band fracture detecting unit is opened also possibly produced by electrical noise.That is to say, when band fracture detecting unit start signal produces, stop motor and well heater, and reexamine band fracture detecting unit start signal be since the band fracture cause or electrical noise cause.

Simultaneously, if band fracture detecting unit is confirmed as unlatching, think the band fracture then on display unit, to show band break signal (S180).Can pass through sound, letter or light and show the band break signal.If band fracture detecting unit is not confirmed as unlatching, then think electrical noise, therefore, carry out normal dry run (S190～200).

Through using this control method, can detect the fracture that is wound on the band on the dry drum 12 rapidly and be with reality whether to rupture with detecting rapidly.And the minimizing of energy consumption and the stability of product are protected through the operation that when band ruptures, stops driver element.

Claims

1. device that is used to detect the band fracture of dryer; Said dryer has the wherein dry drum of accommodating laundry; Rotating force is imposed on the motor of said dry drum and is wrapped in the band on the rotation axis of said dry drum and said motor, it is characterized in that; Said device comprises

Be used to detect the band fracture detecting unit of band fracture, and

Press element, said press element are formed on the excircle of said motor, simultaneously with specific curvature bending; And said press element is outstanding from the said excircle of said motor; And when said band ruptured, said press element was pushed said band fracture detecting unit

Wherein said press element comprises the tip that is connected with the first crooked bend of specific curvature, with said first bend and converts said second bend to second bend and said first bend of the curvature bending bigger than the said curvature of said first bend

Wherein when said band ruptured, along with said motor rotates through torque, said band fracture detecting unit was pressed.

2. device as claimed in claim 1 also comprises:

Be used to support the spring of said motor,

Wherein said torque is produced by the elastic force of said spring.

3. device as claimed in claim 2, wherein when on said motor, producing said torque owing to the elastic force of said band fracture through said spring, said tip is arranged near the point of pushing microswitch.

4. device as claimed in claim 1 also comprises:

The base of said motor is installed on it,

Wherein, the sag radiating element of predetermined depth forms in the upper surface of the said base that said motor is installed above that.

5. device as claimed in claim 4, wherein said radiating element preferably with the identical or bigger curvature bending of curvature of the circle that when rotate at the tip of said press element, forms, thereby said radiating element is not intervened with said press element mutually.

6. device as claimed in claim 1, wherein said band fracture detecting unit comprises microswitch.

7. method that is used to detect the band fracture of dryer, said dryer has dry drum, rotating force is applied to the motor of said dry drum, and with said dry drum and the band that said motor is connected, said method comprising the steps of:

Rotate said dry drum through the input operation order;

When press element is pushed microswitch, open band fracture detecting unit; And

In case said band fracture detecting unit is opened, and just stops the operation of said well heater and said motor.

8. method as claimed in claim 7, wherein when said band ruptured, along with the said motor that is connected with said band rotates through torque, said band fracture detecting unit was pressed.

9. method as claimed in claim 8, wherein said torque be by with flexible member that said motor links to each other in the moment that produces of the restoring force put aside.

10. method as claimed in claim 7, further comprising the steps of:

When said motor and said well heater stopped, after the iteration through the schedule time or predetermined quantity, the forwards/reverse that repeats said motor was rotated; And

Confirm for the second time whether said band fracture detecting unit is held open.

11. method as claimed in claim 10 wherein when confirming that said band fracture detecting unit is held open, notifies the signal of said band fracture to be presented on the display unit.

12. method as claimed in claim 11 wherein notifies the said signal of said band fracture to comprise at least a in sound, word and the light.

13. method as claimed in claim 10 wherein when the opening of said band fracture detecting unit is rotated releasing through the forwards/reverse of said motor, is carried out normal drying program.