KR100751816B1 - Safety device for dryer and control method thereof - Google Patents

Abstract

A safety device for a dryer and a control method thereof are provided to perform a repair and an exchange operation easily by sensing an error operation and a place in which an error occurs. A safety device for a dryer includes a temperature sensor(112), an air speed sensor(114), a controller, and an output part. The temperature sensor is installed on a suction tube(70) and senses a temperature of air which runs through a heater(74) to a drum(60). The air speed sensor senses a speed of air discharged to the outside of the cabinet. The controller blocks power of the heater and the driving motor, if signals received from the temperature sensor and the air speed sensor are out of a predetermined range. The output part transmits an error signal to the outside of the cabinet if the controller determines that an error operation occurs.

Description

Dryer Safety Device and Control Method {SAFETY DEVICE FOR DRYER AND CONTROL METHOD THEREOF}

1 is a block diagram showing a dryer according to the prior art.

2 is a perspective view of a dryer according to the prior art.

Figure 3 is a rear perspective view showing the configuration of a dryer according to an embodiment of the present invention.

Figure 4 is a front perspective view showing the configuration of a dryer according to an embodiment of the present invention.

5 is a rear perspective view showing the suction port and the discharge port of the dryer according to an embodiment of the present invention.

6 is a plan view showing a suction flow path of the dryer according to an embodiment of the present invention.

Figure 7 is a side cross-sectional view showing a suction flow path of the dryer according to an embodiment of the present invention.

8 is a plan view showing the exhaust passage of the dryer according to an embodiment of the present invention.

9 is a block diagram showing a safety device for a dryer according to an embodiment of the present invention.

10 is a flowchart illustrating a control method of a safety device for a dryer according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

50: cabinet 52: inlet

54 discharge port 60 drum

62: support panel 62a: through hole

64: gasket 64a: outlet

70: intake pipe 72: intake fan

74: heater 80: exhaust pipe

82: exhaust fan 84: housing

86: connector 90: drive motor

92: first axis of rotation 94: second axis of rotation

96: belt 110: safety device

112: temperature sensor 114: wind speed detection means

116 control unit 118 output unit

The present invention relates to a dryer, and in particular, by measuring the temperature of the intake air and the flow rate of the exhaust air, a safety device for a dryer that can detect the malfunction of the dryer to prevent overheating and at the same time accurately recognize the occurrence of the malfunction and its It relates to a control method.

1 is a block diagram showing a dryer according to the prior art, Figure 2 is a perspective view showing a dryer according to the prior art.

1 and 2, the dryer according to the prior art forms the appearance of the dryer and the case (2) is formed in the front door to the object, the rotatable disposed inside the case (2) and the blood inside The drum 12, which is opened in the front-rear direction so that the dry matter is accommodated and the air passes therethrough, the heater 18 which is disposed inside the case 2 and heats the sucked air, and passes through the heater 18 An intake duct 20 for guiding heated air to the rear of the drum 12, an exhaust means 22 for discharging the turbid air while drying the object to the outside of the case 2, and the exhaust means ( 22 is provided with a blowing fan (not shown), a motor (not shown) and a belt 40 for rotationally driving the drum 12 and the blowing fan.

The drum 12 is disposed on the inner circumferential surface is a lift 11 for lifting the object to drop.

The exhaust means 22 has a lint duct 25 in which air in the drum 12 is sucked and a filter 24 is mounted to filter foreign matter, and the lint duct 25 communicates with the blower fan 30. It consists of a fan housing 26 enclosing the exhaust housing and an exhaust duct 27 having one end communicating with the fan housing 26 and the other end disposed outside the case 2.

Looking at the operation of the prior art configured as described above are as follows.

First, after the object is put into the drum 12, the door is closed and the dryer is operated. As the motor is driven, the drum 12 and the blowing fan rotate, and the heater 18 is also operated. Done.

At this time, as the drum 12 is rotated, the dry matter in the drum is lifted by the lift 11 and then dropped. In addition, the outside air is heated by high temperature and low humidity air while being sucked into the inside of the heater 18 by the blowing force generated when the blowing fan is rotated, and then the inside of the drum 12 through the intake duct 20. Is discharged.

After the high temperature and low humidity air supplied into the drum 12 is in direct contact with the object to be dropped, the air is dried and moved to the front end side of the drum 12 while being converted into air of low temperature and high humidity. It is discharged out of the dryer through the exhaust duct 27.

In addition, since the dryer according to the prior art does not have a separate safety device, a malfunction such as overheating of the intake pipe is excessively necessary or a malfunction such as clogging of the exhaust pipe cannot be detected, which may cause damage to the dryer. .

The present invention has been made in order to improve the above problems of the prior art, by installing a safety device that can detect whether the intake pipe is overheated and the clogging of the exhaust pipe, it is possible to detect the malfunction and at the same time accurately detect the malfunction occurrence site. It is an object of the present invention to provide a safety device for a dryer and a control method thereof so as to facilitate repair and replacement work.

Safety device for a dryer according to the present invention for solving the above problems is formed with an opening on one side, a cabinet in which the inlet and outlet are formed, the drum is rotatably installed inside the opening to accommodate the laundry, the drum and the inlet An intake pipe provided between the heater, a heater installed in the intake pipe, an exhaust pipe provided between the drum and the discharge port, a drive motor for causing air movement in a flow path consisting of the intake pipe, the drum, and the exhaust pipe, the intake pipe A temperature sensing sensor installed at an air sensor to sense a temperature of air supplied to the drum through the heater, wind speed sensing means installed at the exhaust pipe to sense a speed of air discharged to the outside of the cabinet, and the temperature sensor and the temperature sensor The heater and the drive when the signal received from the wind speed detection means is out of the set range It characterized in that a control unit for controlling the power supplied teoro.

In addition, the present invention is characterized in that it further comprises an output unit for transmitting a malfunction signal to the outside of the cabinet when the malfunction is determined from the control unit.

In addition, the control method of the safety device for a dryer according to the present invention is a temperature sensing step of determining whether the temperature of the air injected into the drum through the heater by the drive motor is less than the set value, the temperature detected in the temperature sensing step It is characterized in that it comprises a wind speed detection step of determining whether the speed of the air discharged to the outside of the cabinet value is less than the set value when the set value is less than the set value, and a driving step of drying operation if the speed of the air discharged from the wind speed detection step is more than the set value. .

In addition, the control method of the safety device for a dryer according to the present invention includes a control step of controlling the power supplied to the drive motor and the heater when the temperature detected in the temperature sensing step is higher than a set value, and the output unit is started when the control step is started. It further comprises a display step driven.

In addition, the control method of the safety device for a dryer according to the present invention is a control step of controlling the power supplied to the drive motor and the heater when the speed of the air discharged in the wind speed detection step is less than the set value, and when the control step is started The display unit may further include a display step of driving.

Hereinafter, an embodiment of a safety device for a dryer and a control method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

For convenience of explanation, the dryer will be described as an example. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator.

Therefore, definitions of these terms should be made based on the contents throughout the specification.

Figure 3 is a rear perspective view showing the configuration of the dryer according to an embodiment of the present invention, Figure 4 is a front perspective view showing the configuration of the dryer according to an embodiment of the present invention, Figure 5 is an embodiment of the present invention 6 is a rear perspective view illustrating a suction port and a discharge port of the dryer according to an embodiment, and FIG. 6 is a plan view illustrating a suction channel of the dryer according to an embodiment of the present invention, and FIG. 7 is a suction of the dryer according to an embodiment of the present invention. Figure 8 is a side cross-sectional view showing the flow path, Figure 8 is a plan view showing the exhaust flow path of the dryer according to an embodiment of the present invention, Figure 9 is a block diagram showing a safety device for a dryer according to an embodiment of the present invention 10 is a flowchart illustrating a control method of a safety device for a dryer according to an embodiment of the present invention.

3 to 10, a dryer according to an embodiment of the present invention forms a predetermined space, an opening is formed at one side, and a cabinet 50 having an inlet 52 and an outlet 54 formed therein and an opening inside. Rotatably installed in the drum 60 to accommodate the laundry, the intake fan 72 provided inside the suction port 52, and installed between the drum 60 and the intake fan 72 to be introduced by the intake fan 72. An intake pipe 70 through which air is guided into the drum 60, a heater 74 installed between the intake pipe 70 and the intake fan 72, and a drum 60 and the discharge port 54. An exhaust pipe (82) provided between the exhaust fan (82), the exhaust fan (82) and the discharge port (54), a drive motor (90) to which the rotation shafts of the exhaust fan (82) and the intake fan (72) are connected; 70) and the safety device 110 is installed on the exhaust pipe (80).

Thus, when power is applied to the driving motor 90 by the user's manipulation, the intake fan 72 and the exhaust fan 82 are rotated to circulate air, and the air introduced through the inlet 52 is a heater 74. It is converted into hot air while passing through) and supplied into the drum 60, and the laundry is dried while being in contact with the wet laundry inside the drum 60.

Thereafter, the air discharged by the exhaust fan 82 is discharged to the outside through the discharge port 54 of the cabinet 50 along the discharge pipe 80, thereby performing a drying operation.

Here, the suction port 52 and the discharge port 54 are formed at the lower end of the rear surface of the cabinet 50, the discharge port 54 is formed in the center, the suction port 52 is formed on one side side.

The drum 60 is formed in a cylindrical shape having a front surface and a rear surface thereof, the front surface corresponding to the opening portion, and the rear surface of the drum 60 is rotatably installed on the support panel 62 having the through hole portion 62a formed therein.

In addition, the drum 60 is provided with a gasket 64 between the front end and the opening of the cabinet 50, and a discharge port 64a is formed at the lower end of the gasket 64.

An extension pipe 86 facing the exhaust fan 82 side is provided at this discharge port 64a, and a housing 84 is installed between the extension pipe 86 and the exhaust pipe 80 so that the exhaust fan 82 is rotatably embedded. .

The intake pipe 70 is formed by a passage extending from the bottom of the rear surface of the cabinet 50 corresponding to the heater 74 to the top of the rear surface of the cabinet 50 corresponding to the through-hole portion 62a, and thus along the intake fan 72. Inflowing air is converted into air having a predetermined temperature or more while passing through the heater 74, and is moved upwardly of the cabinet 50 along the intake pipe 70, and is introduced into the drum 60 through the through hole part 62a. .

At this time, the drum 60 connected to the drive motor 90 and the belt 96 is rotated so that the contact area of the hot air and the laundry is increased, thereby drying the laundry.

The driving motor 90 is provided with a first rotation shaft 92 on one side, a second rotation shaft 94 on the other side, an intake fan 72 on the first rotation shaft 92, and a second rotation shaft 94. Since the exhaust fan 82 is connected to the two-axis motor is connected to the driving motor 90, the first rotary shaft 92 and the second rotary shaft 94 is rotated at the same time.

Here, the belt 96 is installed on the first rotating shaft 92, the belt 96 is fastened to the drum 60, when the power is applied to the drive motor 90, the intake fan 72, exhaust fan 82 ) And the drum 60 are rotated at the same time, so that one motor is driven, so that the circulation of air to and from the drum may be performed simultaneously with the rotation of the drum 60.

In addition, the safety device 110 is installed in the intake pipe 70, the temperature sensor 112 for sensing the temperature of the air supplied to the drum 60 through the heater 74 and the exhaust pipe 80 is installed If the wind speed detection means 114 for detecting the speed of the air discharged to the outside of the cabinet 50, and the signal received from the temperature sensor 112 and the wind speed detection means 114 is out of the set range, the heater 74 and The controller 116 cuts off the power of the driving motor 90, and if the malfunction is determined from the controller 116, the controller 116 outputs a malfunction signal to the outside of the cabinet 50.

Here, the temperature sensor 112 is installed on the upper end of the intake pipe 70, that is, the outer side of the through hole 62a, so that the actual temperature of the air injected into the drum 60 can be effectively measured.

And, the wind speed detection means 114 is made of a fan installed on the outer end of the exhaust pipe 80, it is possible to accurately measure the speed of the air actually discharged to the outside of the cabinet (50).

As a result, if the circulation of the air is not made smoothly due to the blockage of the air flow path, the rotation of the fan becomes slower or lower than a predetermined speed, so that a malfunction can be detected, and the temperature detected by the temperature sensor 112 becomes higher than necessary. By detecting the malfunction of the heater 74 or clogging of the flow path can be detected.

Looking at the operation of the intake and exhaust device of the dryer according to the present invention configured as described above are as follows.

First, when power is applied to the driving motor 90 by a user's manipulation, the intake fan 72, the exhaust fan 82, and the drum 60 connected to the first and second rotating shafts 92 and 94 rotate. The air introduced into the cabinet 50 by the intake fan 72 through the intake fan 72 is injected into the circumferential surface of the intake fan 72 and converted to a predetermined temperature or more while passing through the heater 74. The air passing through 74 is moved upwardly of the cabinet 50 along the intake pipe 70 formed long in the vertical direction on the rear surface of the cabinet 50.

Thereafter, the air introduced into the drum 60 through the through-hole part 62a flows in a whirlwind shape, contacts with the laundry, and performs a drying operation. The gasket provided between the opening of the drum 60 and the inner wall of the cabinet 50 ( A discharge port 64a is formed at 64, and the air discharged out of the drum 60 along the discharge port 64a flows through the connecting pipe 86 to the housing 84 of the exhaust fan 82. In addition, the housing 84 moves along the exhaust pipe 80 and is discharged to the outside of the cabinet 50 through the discharge port 54.

As a result, the intake fan 72, the exhaust fan 82, and the drum 60 are rotated by one driving motor 90, so that the dryer smoothly circulates air inside and outside the drum 60 by a small number of parts. Can be achieved.

At this time, the temperature sensor 112 continuously detects the temperature of the intake pipe 70, and the wind speed detecting means 114 detects the flow velocity of the exhaust pipe 80 to operate only when the measured values of both are included in the set range. This is done.

The control method of the safety device is a temperature sensing step (S10), temperature sensing step (S10) for determining whether the temperature of the air injected into the drum 60 through the heater 74 by the drive motor 90 is less than the set value. If the detected temperature is less than the set value, the wind speed detection step (S20) and judging whether the speed of the air discharged to the outside of the cabinet 50 is above the set value, and the speed of the air discharged from the wind speed detection step (S20) is more than the set value. And a control step (S40) of controlling the power supplied to the driving motor 90 and the heater 74 when the temperature detected in the driving step (S30) and the temperature sensing step (S10) are higher than the set value, when the drying operation is performed. When the control step S40 is started, the output unit 118 is driven to include a display step S50.

Thus, when the intake pipe 70 is overheated due to a malfunction of the heater 74, it is determined whether the control unit 116 is overheated by a signal received from the temperature sensor 112, and when it is determined that the intake pipe 70 is overheated. By controlling power to the heater 74 and the driving motor 90, the driving of the dryer is controlled or stopped, and the output unit 118 is driven so that the user can recognize the malfunction of the dryer.

In addition, the control method of the safety device according to the present invention is a control step (S40) for controlling the power supplied to the drive motor 90 and the heater 74 when the speed of the air discharged in the wind speed detection step (S20) is less than the set value. And, if the control step (S40) is started, and further comprises a display step (S50) for driving the output unit 118.

As a result, when foreign matter accumulates in a flow path such as the intake pipe 70 or the exhaust pipe 80 and the circulation of air is not performed smoothly, the speed of the fan is lowered below the set value, so that the control unit 116 receives a signal transmitted from the fan. Control or cut off the power supplied to the heater 74 and the driving motor 90, so that a malfunction signal is output.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and various modifications and equivalent other embodiments are possible to those skilled in the art. Will understand.

In addition, the dryer has been described as an example, but this is merely exemplary, the safety device of the present invention can be used in other products than the safety device used in the dryer.

Therefore, the true technical protection scope of the present invention will be defined by the claims below.

Dryer safety device and control method according to the present invention configured as described above is installed a temperature sensor and wind speed detection means for measuring the temperature of the air injected into the drum, the flow rate of the air discharged to the outside of the cabinet As a result, the temperature control and the wind speed maintenance in a safe state can be performed, so that the operation of the stable dryer can be performed and the life of the product can be extended.

Claims (5)

An opening formed at one side, and a cabinet having an inlet and an outlet; A drum rotatably installed inside the opening to accommodate laundry; An intake pipe disposed between the drum and the suction port; A heater installed in the intake pipe; An exhaust pipe disposed between the drum and the discharge port; A drive motor for causing air movement in a flow path formed of the intake pipe, the drum, and the exhaust pipe; A temperature sensor installed at the intake pipe and sensing a temperature of air supplied to the drum through the heater; Wind speed sensing means installed in the exhaust pipe and sensing a speed of air discharged to the outside of the cabinet; And And a control unit for controlling the power supplied to the heater and the driving motor when the signal received from the temperature sensor and the wind speed detection unit is out of a set range. The method of claim 1, Dryer safety device characterized in that it further comprises an output unit for transmitting a malfunction signal to the outside of the cabinet when the malfunction is determined from the control unit. A temperature sensing step of determining whether the temperature of the air injected by the drive motor through the heater into the drum is below a set value; A wind speed detecting step of determining whether a speed of air discharged to the outside of the cabinet is greater than or equal to a set value when the temperature sensed in the temperature sensing step is less than or equal to a set value; And a driving step in which a drying operation is performed when the speed of the air discharged from the wind speed detecting step is equal to or greater than a set value. The method of claim 3, wherein And a control step of controlling the power supplied to the driving motor and the heater when the temperature sensed in the temperature sensing step is equal to or greater than a set value, and a display step of driving an output unit when the control step is started. Control method of safety device. The method of claim 3, wherein And a control step of controlling power supplied to the driving motor and the heater when the speed of air discharged from the wind speed detection step is equal to or less than a set value, and a display step of driving an output unit when the control step is started. Control method of a safety device for a dryer.

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