KR20060056803A - A dryer and temperature sensing method thereof - Google Patents

Abstract

The present invention relates to a dryer and a temperature sensing method thereof, and an object of the present invention is to provide a dryer and a temperature sensing method capable of accurately detecting a laundry temperature inside a drum.

In addition, the present invention is to provide a dryer and a temperature sensing method that can display the temperature of the laundry to the user so that the user does not burn or feel uncomfortable when taking out the laundry.

To this end, the present invention is a temperature sensing method of a dryer comprising a housing constituting an appearance, a drum rotatably installed in the housing, and a front panel rotatably supporting the front end of the drum, the temperature installed on the front panel A sensor senses the temperature of the dry matter, and displays whether the temperature of the dry matter and the temperature of the dry matter are below a preset reference temperature.

Description

Dryer and temperature sensing method

1 is a cross-sectional view showing a clothes dryer according to an embodiment of the present invention.

Figure 2 is a perspective view showing the installation structure of the front panel and thermistor of the clothes dryer according to an embodiment of the present invention.

3 is a block diagram illustrating the components of the clothes dryer shown in FIGS. 1 and 2.

4 is a view showing a display state of the clothes dryer shown in FIG.

5 is a flowchart illustrating a temperature sensing method of the clothes dryer illustrated in FIG. 3.

Explanation of symbols on the main parts of the drawings

20: drum

31: heater

50: drive motor

60F: front panel

67: thermistor

90: micom

94: display unit

The present invention relates to a dryer and a temperature sensing method thereof, and more particularly, to a dryer and a temperature sensing method capable of accurately measuring the temperature of a dry product.

In general, the clothes dryer includes a housing for forming an exterior, a drum installed in the housing to contain laundry to be dried, a heating duct for generating hot air to be supplied to the drum, and a hot air suction path for guiding hot air generated from the heating duct to the drum. And a hot air discharge passage for guiding the hot air discharged from the drum to the outside of the housing.

The drum is rotatably installed in the housing, and a blowing fan is installed on the hot air discharge passage to generate the flow force of the hot air. And by the operation of the drive motor for driving the drum and the blower fan at the same time hot air is circulated through the drum and each duct to dry the laundry.

On the other hand, thermistor is installed on the hot air discharge flow path to measure the dryness of the laundry and to sense the temperature inside the drum. The thermistor circulates inside the drum and measures the temperature of the discharged air.The temperature is measured as the temperature of the laundry inside the drum, and the temperature of the laundry is high when the microcomputer controls various devices and the user wants to take out the laundry. Used to prevent problems that may arise due to high. However, such a temperature measurement indirectly detects the laundry temperature inside the drum. The temperature of the air in the state where the temperature is lowered by absorbing the moisture of the laundry is measured on the discharge passage, so that the laundry temperature inside the drum is different from the actual temperature. There was a problem of low detection.

 In order to improve this problem, the conventional clothes dryer disclosed in Korean Patent Laid-Open Publication No. 2004-12001 proposes a method of installing a thermistor on a hot air supply flow path as well as a hot air discharge flow path. That is, by installing a thermistor on the hot air supply passage, it is possible to measure the temperature of the air supplied to the inside of the drum, whereby it is possible to detect the temperature closer to the actual temperature of the laundry inside the drum.

However, such a conventional temperature sensing method is also indirect temperature measurement on the hot air supply flow path, there is a problem that the exact value can not be detected because there is a difference between the actual temperature inside the drum or the temperature of the laundry.

In addition, the laundry temperature is measured to be lower than the actual value when the user wants to take the laundry out of the dryer, there was a problem that the burn due to hot laundry, or feel uncomfortable.

The present invention is to solve the above problems, an object of the present invention is to provide a dryer and a temperature sensing method that can accurately detect the laundry temperature inside the drum.

In addition, the present invention is to provide a dryer and a temperature sensing method that can display the temperature of the laundry to the user so that the user does not burn or feel uncomfortable when taking out the laundry.

The present invention for achieving the above object is a housing forming an appearance, a drum rotatably installed in the housing, a front panel rotatably supporting the front end of the drying container, and is installed in the front panel in the drum It includes a temperature sensor for sensing the temperature of the building.

In addition, the front panel has an annular support portion protrudes so that the outer circumferential surface of the support portion rotatably supports the front-side inner circumferential surface of the drying vessel, the temperature sensor is characterized in that it is installed on the inner circumferential surface of the support portion.

In addition, the temperature sensor is characterized in that the thermistor.

The apparatus may further include a display unit configured to display a temperature of the dry matter detected by the temperature sensor and whether the temperature of the dry matter is below a preset reference temperature.

A temperature sensing method of a dryer comprising a housing forming an exterior, a drum rotatably installed in the housing, and a front panel rotatably supporting a front end of the drum, wherein the temperature sensor is installed on the front panel. Detects the temperature, characterized in that for indicating whether the temperature of the building and the temperature of the building is below a predetermined reference temperature.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

Dryer according to an embodiment of the present invention, as shown in Figures 1 to 3, the housing 10 and the cylindrical drum 20 of the cylindrical shape rotatably installed in the housing 10, the drum ( 20) a hot air suction duct 30 for guiding the hot air into the hot air, and a hot air discharge duct 40 for guiding the discharge of the hot air from the drum 20.

In the front of the housing 10, the inlet 11 for laundry input and withdrawal, and the door 12 for opening and closing the inlet 11 are hinged to one side of the inlet 11, the front of the housing 10 The control panel 13 is provided with a key input unit 91 for controlling the operation of the dryer, a display unit 94 for displaying the operation state of the dryer, and the like.

Hot air suction duct 30 has a built-in heater 31 for heating the air flowing through the inside to generate hot air, one end is open and the other end is connected to the drum 20 to the hot air to the drum 20 The hot air discharge duct 40 has a blowing fan 41 for generating suction and blowing power in the middle thereof, so that the hot air is a hot air suction duct 30, a drying tank 20, and a hot air discharge duct. An exhaust temperature sensor 54 which is discharged to the outside through the 40 in order and further senses the temperature of the discharged air is provided.

The drum 20 is rotatably supported in the housing 10. The drum 20 is rotated by receiving a rotational force through the belt 53 from a driving motor 50 mounted on the inner lower portion of the housing 10. It is supposed to be. At this time, the driving motor 50 drives the drum 20 and the blowing fan 41 at the same time. For this purpose, the rotary shaft 51 of the driving motor 50 extends to both sides so that the blowing fan 41 is disposed at one side. Directly connected to be able to rotate the blowing fan 41, the pulley 52 is installed on the other side to transmit the rotational force to the drum 20 through the belt 53 installed to surround the drum 20 drum 20 ) Can be rotated. Reference numeral “21” is a lifter 21 formed to protrude into the drum 20 to pull up and drop the laundry.

The front side of the drum 20 is provided with a front panel 60F covering the front side of the drum 20 and rotatably supporting the front end of the drum 20, and the drum 20 on the rear side of the drum 20. A rear panel 60R is provided to cover the rear side of the back side and to rotatably support the rear end of the drum 20.

In addition, the front panel 60F and the rear panel 60R are formed in an annular shape so as to rotatably support the inner circumferential surfaces of both ends of the drum 20, respectively, and the outer circumferential surface thereof rotatably supports the inner circumferential surface of the drum 20. The support portions 62 protrude from each other, and a friction member 63 having a small coefficient of friction is disposed on the outer circumferential surface of each support portion 62 so that both front and rear ends of the drum 20 are supported by the friction member 63. 62). Therefore, when the rotational force is transmitted from the driving motor 50 to the drum 20, both front and rear ends of the drum 20 are rotated along the surface of the friction member 63 provided in the support part 62 to rotate.

Hot air suction duct 30 is installed in the rear panel 60R to allow hot air to circulate into the drum 20 so that hot air can be received from the hot air suction duct 30, and the hot air in the front panel 60F. Discharge duct 40 is installed to discharge the hot air. Therefore, the hot air moves from the rear side of the drum 20 in which the hot air suction duct 30 is installed to the front side of the drum 20 in which the hot air discharge duct 40 is installed, thereby drying the laundry in the drum 20.

In addition, the front panel 60F is provided with a through hole 61 through which the laundry passes through the support 62 so that the laundry can be inserted and withdrawn as shown in FIG. The grill member 70 is installed at the end of the hot air discharge duct 40 so that only the hot air passes through the hot air discharge duct 40 so as to prevent the hot air discharge duct 40 from being introduced.

The grill member 70 is provided with a suction port 71 formed in a lattice shape so as to allow hot air to pass through the laundry, and the grill member 70 penetrates the inner circumferential surface of the support part 62 of the front panel 60F. The ball 64 is provided such that the grill member 70 protrudes into the support portion 62 of the front panel 60F formed in an annular shape through the grill installation hole 64 to suck the hot air in the drum 20. .

In addition, the clothes dryer according to the present invention is provided with an electrode sensor 80 and thermistor 67 for detecting the dryness of the laundry. The electrode sensor 80 and thermistor 67 are fixed to the front panel 60F, and the front panel 60F and the rear panel can support the weight of the laundry stored in the drum 20 and the drum 20. Since it is formed of a material having a predetermined strength or more so that it does not deform even when used for a long time, when the drying sensor 80 and thermistor 67 are installed on the front panel 60F, the electrode sensor 80 and thermistor ( 67) can be kept stable for a long time. In the present embodiment, the front panel 60F and the rear panel 60R are formed of a steel material, and a roller 65 is hingedly coupled to the lower portion thereof to rotatably support the drum 20 from the lower side.

On the other hand, the thermistor 67 is a temperature-sensitive semiconductor in which the resistance is extremely changed according to the temperature change, and the temperature range is -50 to 500 ° C., which is applied to all ranges requiring daily temperature control. In addition, since it is small, inexpensive, and highly sensitive, it is used in large quantities as a temperature sensor of home appliances or industrial equipment, and there are various forms.

This thermistor 67 is installed on the inner circumferential surface of the support portion 62, which can directly and accurately measure the temperature of the laundry to the position where the laundry touches while rotating the drum 20. In the present invention, the thermistor 67 is illustrated as being installed on the inner circumferential surface of the support 62, but is not limited to this, of course, can be installed on the lower or upper portion of the inner circumferential surface of the support 62.

As shown in FIG. 4, the display unit 94 indicates that the temperature of the laundry is in the high or low temperature state (1, 3) according to the temperature of the laundry. When the temperature of the laundry is below the reference temperature (35 to 40 ° C.) and sufficiently cooled to determine that it is safe for the user to open the door 12 and take out the laundry, the part 3 indicating the low temperature is turned on. On the contrary, if the temperature of the laundry is higher than the reference temperature, cooling is not performed and it is determined that it is dangerous, so that the part 1 indicating the high temperature state is turned on.

In addition to this, the motor driving unit 92 controlling the driving of the motor 50, the heater driving unit 93 controlling the driving of the heater 31, the microcomputer 90 measuring the temperature of the laundry and controlling the overall operation of the dryer are provided. ).

Hereinafter, a method of sensing the temperature of a dry product will be described with reference to FIG. 5.

First, when a user inputs clothes to be dried in the drum 20 and inputs a desired dryness level through the key input unit 66, and then presses a drying start button, the heater 31 and the driving motor 50 are driven. Accordingly, the hot air generated while passing through the heater 31 by the operation of the blowing fan 41 is introduced into the drum 20 through the hot air suction duct 30. The hot air introduced into the drum 20 is moved by the suction force of the blower fan 41 to evaporate the moisture of the wet laundry and is discharged to the outside of the drum 20 through the hot air discharge duct 40 together with the evaporated water to wash the laundry. It becomes dry. (S10)

When the drying stroke starts, the thermistor 67 detects the temperature of the laundry rotating in the drum and outputs the temperature to the microcomputer 90 (S20). In the microcomputer 90, the temperature detected by the thermistor 67 and the preset temperature are set in advance. Compare the reference temperature (about 35 ~ 40 ℃). (S30)

The microcomputer 90 determines whether the detected temperature is lower than or equal to the reference temperature. (S40) If the detected temperature is lower than or equal to the reference temperature, the microcomputer 90 determines that the laundry is sufficiently cooled and is safe to the display unit 94 shown in FIG. The detected temperature 2 is displayed, and the LED 3 of the portion indicating the low temperature is turned on.

On the other hand, if the detected temperature is higher than the reference temperature, the laundry is not cooled enough to display the detected temperature (2) on the display unit 94, the LED (1) of the portion indicating that the high temperature is lit, warning the user Mark the

In this way, the user can easily determine the temperature of the current laundry. In particular, when there is a lot of residual moisture in the laundry, there is a high risk of the user coming into contact with it and getting burned, so that such a risk factor can be blocked in advance.

As described in detail above, according to the present invention can accurately detect the temperature of the laundry, it can be informed to the user.                     

In addition, the user can be prevented from being burned or feeling uncomfortable by touching the hot laundry.

Claims (5)

A housing forming an exterior, a drum rotatably installed in the housing, a front panel rotatably supporting the front end of the drum, and a temperature sensor installed on the front panel to sense a temperature of the dry matter in the drum. dryer. The method of claim 1, And an annular support portion protrudes from the front panel so that the outer circumferential surface of the support portion rotatably supports the front-side inner circumferential surface of the drying vessel, and the temperature sensor is installed on the inner circumferential surface of the support portion. The method of claim 1, The temperature sensor is a dryer, characterized in that the thermistor. The method of claim 1, And a display unit which displays whether the temperature of the dry matter detected by the temperature sensor and the temperature of the dry matter are below a preset reference temperature. In the temperature sensing method of the dryer comprising a housing forming an appearance, a drum rotatably installed in the housing, and a front panel rotatably supporting the front end of the drum, The temperature sensor installed in the front panel to detect the temperature of the building, The temperature detection method of the dryer for indicating whether the temperature of the dry matter and the temperature of the dry matter is less than a predetermined reference temperature.

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