KR101683122B1 - dryer - Google Patents

Abstract

The present invention relates to a dryer. More particularly, the present invention relates to a clothes dryer for drying clothes.
According to an embodiment of the present invention, a primary load determination step is performed to determine whether a load caused by clothing accommodated in the drum is a temporary small load or a heavy load through a change in air temperature discharged from the drum. A second load determination process for determining whether the load is a small load or a very small load through the drying degree sensor provided in the drum, step; And a drying step of performing drying in accordance with the load determined in the primary or secondary load determination step.

Description

Dryer {dryer}

The present invention relates to a dryer. More particularly, the present invention relates to a clothes dryer for drying clothes.

The dryer is an appliance for drying clothing by supplying hot air to the drum accommodating the clothes. These dryers are supplied not only for home use but also for commercial use.

A commercial dryer is a dryer that many users pay for. That is, the dryer provided by the supplier can be referred to as a dryer in which a large number of users pay for the use of the dryer. Fees may be paid each time you use the dryer, or in a dormitory or similar place, this fee may be included in the separate administrative fee.

Unlike home dryers, drying time and energy usage management are very important for commercial dryers. Because many people use it, but use less energy, so the profit of the supplier that supplies the dryer must be guaranteed. Therefore, the drying time in a commercial dryer is generally shorter than the drying time in a domestic dryer. For this purpose, it is common that the amount of heat and air flow is higher in a commercial dryer than in a domestic dryer.

On the other hand, for the user, the drying quality should be satisfied after the drying time. For example, if drying is not performed properly at the end of the drying time, no user will appreciate the time and expense of additional drying.

Therefore, in many cases, in a commercial dryer, drying is generally performed irrespective of the amount of clothes to be dried, that is, the load. That is, the amount of heat of the heater is increased as much as possible to shorten the drying time, and drying completion is generally performed through the drying degree sensor.

However, such a load-independent drying causes the following problems.

When the amount of load is large, a lot of clothes consuming calories are consumed, which means that a lot of water consuming heat is consumed. Therefore, even if a high heat quantity is supplied into the drum during the drying process, the temperature inside the drum or the temperature of air discharged from the drum is not so high. Exceptions are, of course, exception when drying is performed sufficiently.

On the other hand, when the amount of the load is not large, the temperature inside the drum may increase significantly even when drying is not sufficiently performed. That is, the amount of heat supplied is not sufficiently consumed for drying. This may cause thermal damage to parts made of plastic rather than metal. Particularly, there may be a problem that the grill discharging air from the drum is thermally damaged. Of course, in such a case, energy can be wasted unnecessarily.

Therefore, it is preferable to control the amount of dry heat or the amount of air depending on the load. Nevertheless, it is not easy to accurately determine the load. This is because mounting a separate sensor for measuring the load of the garment causes cost increase and control difficulty. In addition, when such a sensor is used, it is very difficult to sense a very small load, for example, a load of 1 kg or less (hereinafter referred to as a "very small load").

These very small loads cause the following problems.

As the drum is driven, a very small load in the drum can easily oscillate. At this time, when the air flow is performed, that is, when hot air or cold air is supplied to the drum, the very small load can be brought into close contact with the exhaust grill. The load bearing the moisture is in close contact with the exhaust grille, which interferes with the flow path of the air. Thus, sufficient drying can not be carried out and duct clogging errors frequently occur. Therefore, complaints of the user or the supplier may be increased, and the reliability of the product may be deteriorated.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problem of the conventional dryer described above.

An object of the present invention is to provide a dryer and a control method thereof that can accurately determine a load and perform optimal drying according to a determined load through an embodiment of the present invention.

According to an embodiment of the present invention, it is an object of the present invention to provide a dryer and a control method thereof, which can reduce a clogging of an exhaust grill by a very small load by determining a very small load particularly in a small load.

In accordance with an embodiment of the present invention, there is provided a dryer capable of accurately determining a load regardless of an initial environment of the dryer, and a control method thereof.

The present invention provides a dryer capable of precisely determining a load through a temperature sensor and a drying degree sensor, which are components of the dryer, and a control method thereof, by eliminating the configuration added for load determination. Another object of the present invention is to provide a dryer and a control method thereof that can accurately determine a load by performing a load determination step a plurality of times if necessary, and by using different determination factors in each determination step. For example, in a specific determination step, a load is determined through a temperature factor through a temperature sensor, and in another specific determination step, a load factor is determined through a drying factor through a drying degree sensor.

According to an embodiment of the present invention, a dryer and its control method capable of reducing a drying time unnecessarily by omitting a subsequent load determination step when a load determination step is performed a plurality of times if necessary, .

In accordance with an embodiment of the present invention, there is provided a dryer capable of preventing shock noise due to a rapid increase in the RPM of the fan motor during cooling after the drying and improving the reliability of the product, and a control method thereof.

It is possible to increase the control target calorie amount and the air flow amount RMP in the case where the determined load is large than in the case where the determined load is small and to prevent overdrying and under drying, .

According to an embodiment of the present invention, in order to realize the above-mentioned object, according to an embodiment of the present invention, a change in the temperature of the air discharged from the drum causes a change in the temperature of the drum A load determining step; A second load determination process for determining whether the load is a small load or a very small load through the drying degree sensor provided in the drum, step; And a drying step of performing drying in accordance with the load determined in the primary or secondary load determination step.

A temperature sensor may be provided to sense the temperature of the air discharged from the drum. In the primary load determination step, the heater and the fan motor are driven together with the drum driving. Therefore, hot air is supplied into the drum. As the hot air is supplied, the temperature of the air discharged from the drum changes. Through the temperature change of the air, it is judged whether the load in the drum is a temporary small load or a heavy load. A large change in the temperature of the air means that the increase or increase rate of the temperature is large. Therefore, when the rise or rise rate of the temperature is equal to or higher than the specific value, it is determined that the load is a temporary small load. This is because a large amount of load absorbs a relatively large amount of supplied heat and the temperature rise or rise rate is relatively low.

The secondary load determination step may be performed while stopping the hot air supply and driving the drum. That is, the driving of the heater and the driving of the fan motor may be stopped and only the drum motor may be driven. Through this, the clothes in the drum can be moved only by the drum drive, and not by the wind. Therefore, the load can be effectively determined through the drying degree sensor.

Wherein in the drying step, the target heating rate of the heater and the target RPM value (target air flow rate) of the fan motor are greater than when the determined load is large, . That is, a relatively high amount of heat and air is supplied at a large load level. Of course, this calorie and air volume mean the amount of heat and air supplied per hour.

When the determined load is a small load and a very small load, it is preferable that the heating amount of the heater and the RPM value of the fan motor are controlled to be constant in the drying step. That is, it is preferable that the predetermined amount of heat and the amount of air are supplied constantly. Of course, it is preferable that the heat quantity and the air quantity at this time are smaller than the heat quantity and the air quantity in the case of a medium heavy load.

When the determined load is a heavy load, it is preferable that the heating amount of the heater and the RPM value of the fan motor are controlled to be variable in the drying step. That is, the predetermined amount of heat and the amount of air can be controlled to be increased or decreased or increased or decreased in a predetermined ratio.

Specifically, the amount of heat supplied to the heater is controlled to gradually decrease, and the RPM value of the fan motor is controlled to gradually increase. That is, in the case of a heavy load, a relatively high amount of heat and a low amount of air are controlled in the initial period of the drying step, and a relatively low amount of heat and air amount can be controlled in the subsequent period.

And an initial temperature sensing step of sensing the temperature in the temperature sensor before the primary load determination step. This initial temperature sensing step may be performed to prevent or reduce the load determination error due to the initial state of the dryer, i.e., the initial temperature environment. In the initial temperature sensing step, it is preferable that the heater is excluded and the fan motor and the drum are driven. This makes it possible to more accurately determine the initial temperature environment.

The detection of the initial temperature is preferably performed after a predetermined time (for example, 5 seconds) has elapsed since the start of driving the drum and the fan motor. Accordingly, it is possible to more accurately determine the initial temperature environment of the entire dryer as well as the initial temperature environment at a specific position (i.e., the vicinity of the position of the temperature sensor).

A course input step for inputting a drying course before the initial temperature sensing step is performed, and the initial temperature sensing step is preferably performed for the first time in the input drying course. When the user inputs a course and makes a start input, the controller (controller) performs an initial temperature sensing step before performing the inputted course. Then, through the load determination step, the corresponding drying course is performed according to the determined load.

The drying course may be divided into a plurality depending on the maximum allowable or maximum temperature in the drying step. For example, it can be divided into a high temperature course, a medium temperature course and a low temperature course.

When the initial temperature sensed in the initial temperature sensing step is lower than a preset temperature (for example, 44 degrees), the primary load determination step is preferably performed. That is, if the temperature is lower than the predetermined temperature, the primary load determination step can be performed. Here, the preset temperature can be a temperature that can effectively distinguish between the small and heavy loads through the temperature increase in the subsequent primary load determination step. That is, at a temperature lower than the predetermined temperature, it is possible to effectively distinguish between the provisional small load and the heavy load through the temperature increase. If the preset temperature is exceeded, the difference in temperature between the temporary small load and the heavy load may not be large.

If the initial temperature sensed in the initial temperature sensing step exceeds the predetermined temperature (for example, 44 degrees), it is preferable to repeat the initial temperature sensing step for a predetermined time (for example, five minutes).

Preferably, during the repetition of the initial temperature sensing step, when the sensed initial temperature is equal to or lower than the predetermined temperature, the primary load determination step is performed. If the initial temperature exceeds the predetermined temperature (for example, 44 degrees), it is preferable that the primary load determination step is omitted and the secondary load determination step is performed. This is because when the temperature does not drop below the predetermined temperature during the preset time, it means that the load is relatively small.

It is preferable that the primary load determination step is performed by dividing the initial temperature sensed in the initial temperature sensing step into a plurality of temperature ranges (for example, 3 ranges, 29 degrees, 39 degrees, and 44 degrees). This enables more effective and accurate load judgment.

In the primary load determination step classified into the respective temperature ranges, the temperature sensed by the temperature sensor for a first set time (for example, 2 minutes) is set to an upper limit temperature of the corresponding temperature range (for example, 29 degrees, 39 degrees, 44 (For example, 30 degrees, 40 degrees, 45 degrees) larger than the first reference temperature (for example, 30 degrees, 40 degrees, 45 degrees), it is preferable that the second load determination step is omitted.

If the temperature sensed by the temperature sensor within the first set time (for example, 2 minutes) satisfies the first reference temperature (for example, 30 degrees, 40 degrees, 45 degrees) or more, And calculating an increase rate of a temperature sensed by the temperature sensor from a time when the first reference temperature or more is satisfied.

The rising rate of the temperature is set to a second reference temperature (for example, 35 degrees, 44 degrees, 48 degrees) higher than the first reference temperatures (for example, 30 degrees, 40 degrees, 45 degrees) within a second set time , It is preferable that high / low is determined as to whether or not it is satisfied.

If the rate of increase of the temperature is high, it is determined that the load is a provisional small load. If it is low, it is determined that the load is a heavy load.

Preferably, in each of the temperature ranges, the difference between the second reference temperature and the first reference temperature is smaller as the temperature is higher, and the second set time is the same regardless of the temperature range.

In each of the temperature ranges, it is preferable that the first set time is all the same. It is preferable that the predetermined temperature is set to be smaller as the temperature range is higher.

Preferably, the first load determination step includes an RPM setting step of raising the RPM of the fan motor. The step of setting the RPM may be a step of incrementing the RPM stepwise.

In the first load determination step, the amount of heat supplied to the heater is preferably maximally controlled.

Preferably, the second load determination step is performed for a preset time.

It is preferable that duct clogging detection through the air flow switch is excluded in the first and second load determination steps and is performed in the drying step.

And a cooling step of supplying the cool air to the inside of the drum by driving the fan motor together with the drum driving after the completion of the drying step. In the cooling step, the fan motor is controlled to operate with the immediately preceding RPM.

According to an aspect of the present invention, there is provided a method of controlling a dryer for drying clothes by supplying hot air into a drum, the method comprising: Sensing step; A primary load determining step of determining whether the load caused by the clothes is a temporary small load or a medium load through a temperature sensor provided for supplying hot air into the drum and detecting the temperature of the air discharged from the drum; A second load determination process for determining whether the load is a small load or a very small load through a drying degree sensor provided in the drum, step; And a drying step of performing drying in accordance with the extremely small load, the small load, and the medium heavy load determined in the primary or secondary load determination step, wherein the primary load determination step comprises: Wherein the control is performed for each of a plurality of different temperature ranges.

In the initial temperature sensing step, it is preferable that the heater is excluded and the fan motor and the drum are driven.

In order to achieve the above-mentioned object, according to an embodiment of the present invention, there is provided a washing machine comprising: a drum in which clothes are accommodated; A drum motor for driving the drum; A fan motor provided separately from the drum motor and generating a flow of air; An exhaust passage provided to discharge the air discharged from the drum to the outside; A temperature sensor for sensing the temperature of the air discharged from the drum; A drying degree sensor provided inside the drum for sensing the degree of drying through the contact frequency with the clothes; An air flow switch for sensing whether the path through which the air flow is performed is blocked; A heater for heating the air; In addition, it is determined whether the load caused by the garment is a temporary small load or a heavy load according to a temperature value sensed by the temperature sensor. If the load is a small amount load, And a controller for controlling the drum motor, the fan motor, and the heater so as to determine whether the load is a very small load or not, and to perform drying with different amounts of heat and air depending on the determined loads.

Preferably, the controller determines whether the temporary small amount load and the medium large amount load are in each of a plurality of temperature ranges according to an initial temperature sensed by the temperature sensor. Through this, it is possible to judge the temporary small load and the heavy load more accurately and effectively.

Wherein the controller determines that the temporary small load is a load and the temporary small load and the heavy load determination are omitted if the initial temperature exceeds the upper limit value of the temperature range and does not satisfy the upper limit value or less for a predetermined time desirable.

The controller preferably omits the determination of the small load and the extremely small load in the case of judging that the load is a heavy load under the provisional quantity load and medium heavy load judgment.

In order to achieve the above object, according to an embodiment of the present invention, there is provided a dryer for judging a load of clothes contained in a drum and performing drying by supplying different amounts of heat and air according to a determined load, (1 section) through a temperature sensor that senses the temperature of the discharged air and judges whether there is a small amount of heavy load or a heavy load. If it is determined that the load is small, It is possible to provide a dryer having a controller for judging a small load and a very small load (two sections) through a drying degree sensor for sensing the degree of drying.

In the case where the controller determines that the load is a heavy load, the controller can omit the determination of the small load and the extremely small load. Therefore, it is possible to prevent the entire operation time of the dryer from being increased due to the execution of the unnecessary section.

Preferably, the controller determines whether the temporary small amount load and the heavy amount load are within a plurality of temperature ranges according to an initial temperature sensed by the temperature sensor. This is due to the fact that as the initial temperature increases, the rate of temperature rise becomes smaller on the premise of the same heat quantity and the same load. Therefore, it is preferable that the reference value of the temperature rise rate for distinguishing the temporary small amount load and the medium large amount load in each of the plurality of temperature ranges is different from each other. It is preferable that the reference value of the rate of temperature rise in a range where the temperature is high is smaller.

The controller determines that the preliminary small load is a load (0 period) when the initial temperature exceeds the maximum value of the temperature range and does not satisfy the maximum value or less for a predetermined time, (1 section) is desirably omitted.

Preferably, the controller controls the drum motor, the heater, and the fan motor so that the drum is driven in the zero section and cool air, not hot air, is supplied.

The controller preferably controls the drum motor, the heater, and the fan motor so that the drum is driven and the maximum amount of heat is supplied in the one section.

Preferably, the controller senses whether the air flow is obstructed through the air flow switch in the first section, and controls the RPM of the fan motor to increase so as to increase the air flow when there is no clogging of the air flow.

Preferably, the controller controls the drum motor, the heater, and the fan motor so that the drum is driven in the two sections and cool air and hot air are not supplied.

The controller preferably controls the drum motor, the heater and the fan motor so as to supply different amounts of heat and air depending on the determined load.

The heater may include a gas burner and may include a modulator for controlling the gas pressure supplied to the gas burner by varying the opening degree in proportion to an applied current value or a voltage value to adjust the calories.

The controller preferably controls the opening degree of the gas valve to be variable only when the determined load is a heavy load. In the case of a small load and a very small load, the opening degree is preferably controlled to be constant.

According to an embodiment of the present invention, it is possible to provide a dryer capable of accurately determining a load and performing optimal drying according to a determined load, and a control method thereof.

According to one embodiment of the present invention, it is possible to provide a dryer and a control method thereof that can reduce the clogging of the exhaust grill by a very small load by determining a very small load particularly in a small load.

It is possible to provide a dryer and a control method thereof that can accurately determine a load regardless of an initial environment of the dryer through an embodiment of the present invention.

It is possible to provide a dryer and a control method thereof that can precisely determine a load through a temperature sensor and a drying degree sensor, which are basic components, by eliminating a configuration added for judging a load through an embodiment of the present invention. . Further, it is possible to provide a dryer and a control method thereof, which can accurately determine a load by performing a load determination step a plurality of times if necessary, and by varying determination factors in respective determination steps. . For example, in a specific determination step, a load is determined through a temperature factor through a temperature sensor, and in another specific determination step, a load can be determined through a drying factor through a drying degree sensor.

According to an embodiment of the present invention, a dryer and its control method capable of reducing a drying time unnecessarily by omitting a subsequent load determination step when a load determination step is performed a plurality of times if necessary, .

The present invention can provide a dryer and a control method thereof that can prevent shock noise due to a sudden increase in the RPM of the fan motor during cooling after the drying and improve the reliability of the product.

It is possible to increase the control target calorie amount and the air flow amount RMP in the case where the determined load is large than in the case where the determined load is small and to prevent overdrying and under drying, Can be provided.

1 is a cross-sectional view of a dryer according to an embodiment of the present invention,
2 is a control block diagram of a dryer according to an embodiment of the present invention,
3 is a flowchart of a method of controlling a dryer according to an embodiment of the present invention,
4 is a detailed flowchart of an example of the initial temperature sensing step shown in FIG. 3,
5 is a detailed flowchart of an example of the primary load determination step shown in FIG. 3,
6 is a detailed flowchart of an example of the RPM setting step shown in FIG. 5,
FIG. 7 is a detailed flowchart of an example of the secondary load determination step shown in FIG. 3,
FIG. 8 is a detailed flowchart of an example of the cooling step shown in FIG. 3;
9 is a partial front view showing an example of a front surface of the control panel shown in Fig. 1, and Fig.
10 is a perspective view showing an example of the modulator shown in FIG.

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

Unless defined otherwise, all terms herein are the same as the general meaning of the term as understood by one of ordinary skill in the art to which this invention belongs, and if the terms used herein conflict with the general meaning of the term Are as defined herein.

It is to be understood that the present invention is not limited to the details of the embodiments described below, .

1, a dryer 100 according to an embodiment of the present invention includes a cabinet 1 forming an outer appearance, a drum 2 rotatably installed in the cabinet 1 to receive laundry, An air supply portion 3 for supplying heated air (hot air) or unheated air (cold air) to the drum, an exhaust passage 4 for discharging the air inside the drum to the outside of the drum, And a filter assembly 5 for removing foreign matter.

The cabinet 1 includes a front panel 11 provided with an inlet 111, a rear panel 13 provided with an air inlet 131 communicating with the inside of the drum 2, And a base panel 15 supported by the panel 13 and positioned under the drum 2. In addition, the cabinet 1 may include a side panel not shown.

The user can insert clothes into the drum 2 or draw them out of the drum through the input port 111. The input port 111 can be opened and closed by a door 113 rotatably fixed to the front panel 11 have.

The front panel 11 may further include a control panel 115 having an input unit (not shown) for inputting a control command to the dryer and a display unit (not shown) for displaying control details of the dryer. An example of the control panel 115 will be described later with reference to Fig.

The rear panel 13 is provided in a direction opposite to the front panel so as to face the front panel. The air inlet 131 passes through the rear panel 13 so that air supplied from the air supply unit 3 So that it can be introduced into the drum 2.

The rear panel 13 may be provided with an air discharge port 133 for moving the air discharged from the drum 2 through the discharge passage 4 to the outside of the cabinet 1.

Further, the rear panel 13 may further include a rear support flange 135 for rotatably supporting the rear surface of the drum 2, which will be described later in detail.

The front panel 11 and the rear panel 13 are fixed to the base panel 15 by means of supporting the dryer 100 on the ground.

The cabinet 1 further includes a drum supporting portion 17 for rotatably supporting the front face of the drum 2. The drum supporting portion 17 includes a supporting body 171 fixed to the inside of the cabinet 1, And a support through hole 173 which penetrates through the support body 171 and communicates the inlet 111 with the inside of the drum 2. [

Therefore, the laundry introduced into the cabinet 1 through the inlet port 111 can be moved to the drum 2 via the support portion through-holes 173. [

The drum support 17 may further include a front support flange 175 that rotatably supports the front surface of the drum 2. The front support flange 175 may be formed on the outer circumferential surface of the support through hole 173 Respectively.

In this case, the diameter of the front support flange 175 may be larger than the diameter of the support through-hole 173 according to the diameter of the drum 2.

The drum 2 may be provided in a cylindrical shape having open front and rear faces. As described above, the front face of the drum is rotatably supported by the front support flange 175, Is rotatably supported by a support flange (135).

The drum 2 is rotated by a drum driving unit. The drum driving unit may include a drum motor 21, and a belt 23 that connects the rotation axis of the drum motor and the outer circumferential surface of the drum 2. The drum motor is driven to drive the drum.

The air supply unit 3 is a means for inducing heat exchange between laundry and air by supplying heated air or unheated air to the drum 2. The air supply unit 3 includes a heater housing 31 provided in the rear panel 13, A heater (heating means) 33 provided in the exhaust passage 4, and a fan motor 35 provided in the vicinity of the exhaust passage 4 or the exhaust passage. Accordingly, when the fan motor 35 is driven, the fan motor 35 sucks air through which the external air flows through the housing inlet 311, the air inlet 131, the drum 2, the connecting duct 41, , Filter assembly (5) and exhaust duct (43). That is, the fan motor 35 may be configured to suck outside air in accordance with the above-described configurations, and to discharge the air to the outside through the exhaust passage 4.

The heater housing 31 further includes a housing inlet 311 for surrounding the air inlet 131 provided in the rear panel and for introducing air into the heater housing 31.

The heater housing 31 is not provided inside the cabinet 1 but is provided outside the cabinet 1 for drying a large capacity laundry.

As the amount of laundry is increased, a large amount of air is supplied into the drum 2, so that the laundry can be dried within a predetermined time. Accordingly, a dryer for drying a large capacity laundry may be a large-capacity heater (heating means) capable of heating a large amount of air while increasing the amount of air supplied to the drum.

However, if the large-capacity heater is provided in the cabinet 1, the cabinet 1 is not only large in outer size, but also the temperature inside the cabinet 1 is increased by the large-capacity heater, thereby damaging internal parts of the dryer.

In order to solve such a problem, the dryer 100 according to an embodiment of the present invention may be constructed by fixing the air supply unit 3 to the outside of the cabinet 1, and drying and drying May be suitable for a commercial dryer that requires a dryer.

It is preferable that the air supply unit 3 includes a heater 33 of a gas burner type in order to supply a high heat quantity. That is, it is preferable to apply a gas burner heater other than an electric heater. For this purpose, a gas pipe 37 may be provided. In addition, it is preferable that a modulator 36 for controlling the gas pressure supplied to the heater 33 is provided. The higher the gas pressure supplied to the heater, the higher the heat value can be provided.

The exhaust passage 4 is a means for discharging the air inside the drum 2 to the outside of the cabinet 1 as described above so that the height direction of the drum 2 (the direction perpendicular to the rotation axis C of the drum) And an exhaust duct 43 provided along the longitudinal direction of the drum 2 and discharging the air supplied from the connecting duct 41 to the outside of the cabinet 1 have. The fan motor 35 may be located near the exhaust duct 43 or the exhaust duct.

The connecting duct 41 is a means for moving the air inside the drum 2 to the discharge duct 43 below the discharge port 111 (in front of the support through-hole 173). The exhaust duct 43 connects the connecting duct 41 and the air outlet 133 to discharge the air discharged from the drum 2 through the connecting duct 41 to the outside of the cabinet 1 . In this case, the fan 35 provided in the air supply unit 3 may be fixed to the outside of the cabinet 1 so as to suck in the air inside the discharge duct 43.

As described above, in order to dry a large capacity laundry, it is necessary to secure a large air volume. However, it is not easy to install a large capacity fan inside the cabinet 1 having a limited size.

Accordingly, if the fan motor 35 is fixed to the rear panel 13 as shown in FIG. 1 and the fan motor 35 is provided to discharge the air inside the drum 2 through the air outlet 133, It is possible to install a large-capacity fan without changing the size of the fan (1).

The filter assembly 5 provided in the dryer 100 according to the embodiment of the present invention is provided along a direction parallel to the rotation axis C of the drum (the longitudinal direction of the drum) to filter the air exhausted from the drum. The filter assembly 5 may be detachably attached to the exhaust duct 43 rather than the connecting duct 41 to filter the air discharged from the drum 2. [

In the conventional dryer, a filter is provided in the connecting duct 41, but the length of the connecting duct 41 can not be changed unless the size of the dryer is changed, which makes it difficult to expand the filtering capacity of the filter.

However, since the dryer 100 according to the embodiment of the present invention is provided with the filter assembly 5 in the discharge duct 43 provided in the longitudinal direction of the drum 2 (in the direction parallel to the rotation axis C of the drum) The filtration capacity of the filter can be remarkably increased.

Therefore, the dryer 100 according to the embodiment of the present invention can be used as a commercial dryer requiring rapid drying of laundry and drying of large-capacity laundry.

The filter assembly 5 may be detachably attached to the exhaust duct 43. The filter panel 19 may be provided on the front panel 11. [

An exhaust grill 50 may be provided on the upper portion of the connecting duct 41. The exhaust grill (50) is formed in a mesh shape to prevent large foreign matter or clothes from flowing into the connecting duct (41). The exhaust grill 50 is generally made of a plastic material.

As described above, a situation in which garment blocks the exhaust grill 50 in a very small load can sometimes occur. As a result, the flow path of the air is clogged, and the thermal damage of the components due to the overload and the high temperature rise of the fan motor 35 may occur. In particular, the exhaust grill 50 can be deformed into thermal damage.

An air flow sensor 70 may be provided to sense the clogging of the air flow path. The air flow sensor 70 may be provided in the heater housing 31. If the air flow path is blocked, the negative pressure further rises inside the heater housing 31. Accordingly, the air flow sensor 70 senses a rise in the sound pressure to determine that the air flow path is blocked.

Clogging of the air flow path can occur at various positions such as the connecting duct 41, the filter assembly 5, and the exhaust flow path 4 as well as the exhaust grill 50.

The dryer according to the embodiment of the present invention may be an exhaust type dryer. That is, it can be said that the dryer is a type in which the air from which moisture has been removed from the clothes is discharged to the outside of the dryer. Therefore, an excessively high temperature of the air to be discharged means that over-drying is performed, which means that energy is wasted. Therefore, in order to appropriately control the amount of heat and / or the amount of air, it is important to sense the temperature of the discharged air.

To this end, the dryer 100 according to the present embodiment is preferably provided with a temperature sensor 80. In particular, the temperature sensor 80 is preferably provided to sense the temperature of air discharged from the drum. For this purpose, the temperature sensor 80 is preferably provided in the exhaust passage 4. In particular, the temperature sensor 80 is preferably provided in or near the exhaust duct 43. Accordingly, the temperature environment around the dryer can be easily sensed, and the temperature environment inside the dryer can be easily sensed. In particular, it is possible to sense an environment such as whether the dryer is operating immediately or a lot of time has elapsed since the operation. Accordingly, the initial environmental factor can be reflected when the dryer starts operating through the temperature sensor 80. [ This can be a very important factor for load sensing as described below.

Means for determining how far drying has progressed during drying, for example, means for sensing the degree of drying, can be provided in a wide variety of ways. For example, a dryness sensor may be provided that senses the degree of dryness using frequency and / or moisture content in contact with wet clothing in the drum. Such a dryness sensor may be referred to as an electrode sensor, and it senses the degree of dryness through an output value proportional to the frequency and / or the moisture content, for example, the resistance value.

The dryer 100 according to the present embodiment is preferably provided with such a drying degree sensor. The drying degree sensor 60 may be provided inside the drum 2, particularly at the lower portion of the drum 2. Load sensing can be performed through the drying degree sensor 60. Particularly, as described later, it can be very importantly used for a very small amount of load, that is, very small load detection.

Hereinafter, the control components of the dryer according to an embodiment of the present invention will be briefly described with reference to FIG.

The dryer 100 basically includes a controller 10 for controlling various control components of the dryer.

The controller 10 may be provided to control the operation of the drum motor 21 and the operation RPM. The controller 10 may control the user interface 20. Of course, the operation of the dryer can be controlled by reflecting the information input through the user interface 20. [ The user interface 20 may be provided to allow the user to input various types of information to the dryer, and may be provided to provide various information to the user in the dryer.

The controller 10 can control the operation of the dryer through the clogging information of the air flow path sensed through the air flow switch (AFS) In addition, when the clogging information of the air flow path is received, error information can be provided to the user through the user interface 200. [

The controller 10 can control the operation of the dryer through the temperature sensed through the temperature sensor 80. [ As will be described later, the controller 10 can determine the load through the temperature information sensed by the temperature sensor 80.

The controller 10 may be provided to control the operation of the fan motor 35 and the operation RPM. When the fan motor 35 is operated, hot air or cold air is supplied into the drum. In addition, increasing the operating RPM can increase the amount of hot air or cool air supplied.

It is preferable that the drum motor 21 and the fan motor 35 are individually provided as shown in FIG. Thus, the driving of the drum and the flow of air can be independently controlled. This means that the flow of air can be forced to occur even when the drum is not driven. On the contrary, it means that the generation of the flow of air can be stopped when only the drum is driven. As will be described later, through such independent control, it becomes possible to operate such that a very small load is separated from the exhaust grill at a very small load.

The controller 10 can control the on / off state of the heater 33. The amount of heat supplied from the heater 33 can be controlled. This can be performed by controlling the gas pressure supplied to the heater 33 when the heater 33 is a gas burner type heater. To this end, a modulator 36 may be provided, and the controller 10 may control the amount of heat by controlling the modulator 36.

The modulator 36 may vary the gas pressure in proportion to the current value or the voltage value input to the electric modulator. For example, the gas pressure can be varied by varying the opening of the electrical modulator. The electrical modulator may be an electrical modulator that is linearly controllable. For example, by increasing the current value applied to both ends of the modulator, the opening degree can be increased to increase the gas pressure supplied to the heater 33.

The maximum open position and the minimum open position of the modulator can be set mechanically. Between the maximum open position and the minimum open position, the opening degree can be adjusted by increasing or decreasing the applied current value. This, of course, makes it possible to regulate the gas pressure.

Hereinafter, a control method of the dryer according to an embodiment of the present invention will be schematically described with reference to FIG.

The dryer can start the drying operation (S10) by applying power to the dryer 100 or paying the fee.

First, the user selects any one of a plurality of drying courses (S20). Upon receiving such a course selection, a load determination (S300) is made to perform the selected course differently according to the load. Of course, the start input should be performed after selecting the course.

It is preferable that any one of a plurality of drying courses can be selected in the course selection. For example, the drying course may be selected depending on the material of the clothes to be dried. For example, a plurality of drying courses may be divided into high and low calories supplied to clothes. In order to dry heavy and tough clothes such as jeans, it is necessary to have a high temperature course, a medium temperature course to dry ordinary casual clothes, a low temperature course to dry synthetic clothes, and a hot wind course to dry plastic or rubber garments can do.

Details of the user interface such as the course selection will be described later with reference to FIG.

When the course selection (S200) and the load judgment (S300) are completed, the controller performs drying (S400) according to the determined load and the selected course. The drying can be generally performed by supplying hot air. The amount of heat and the amount of hot air can be controlled differently depending on the selected course. Of course, drying can be performed by supplying only cold air in the heat-free wind course.

When the drying (S400) is completed, cooling (S500) can be performed by supplying cold air to the clothes. This cooling (S500) is intended to further dry and cool the components of the dryer such as clothes or drums.

The cooling operation S500 is terminated and the operation of the dryer is terminated (S600).

The operation of the dryer in the order of selecting the course (S200), drying (S400), and cooling (S500) is a general matter. However, in the method of controlling the dryer according to the embodiment of the present invention, it is preferable to perform the load determination (S300) before the drying (S400) and to change the heating amount and the air volume control pattern in the drying (S400) . In addition, it is preferable to perform a plurality of determination steps basically in order to perform the accurate load determination (S300).

For example, it is preferable that the load determination (S300) basically determines the load finally through at least two load determination steps. Of course, the load determination step of the previous stage may not be a step of determining the final load, but may be a preliminary step for performing a subsequent load determination step.

The control method of the dryer according to the present embodiment preferably includes a primary load determination step (S330) for determining whether the load is a temporary small load or a heavy load. In the primary load determination step (S330), it can be determined whether the load is a heavy load, and it can be determined whether the load is a small load. If it is judged to be a temporary small load, it means a judgment pending state which may be a final small load or a very small load, not a final small load.

For example, a heavy load can mean a load greater than 3 kg. A small load can mean a load less than 3 kg. In addition, a load less than 1 kg in a small load can be regarded as a very small load. Here, the criterion for dividing the load may vary depending on the size of the dryer, the heat capacity of the heater, and the size of the drum.

Thus, for example, the final heavy load may exceed 3 kg, the small load may be less than 1 kg and less than 3 kg, and the very small load may be less than 1 kg. Therefore, if it is determined that the load is a temporary small load, a judgment step for judging whether it is a final small load or a final very small load may be followed.

The distinction between heavy load and low load is aimed at saving energy due to excessive heat supply. In addition, particularly in a small load, it is necessary to distinguish a very small load to prevent excessive heat quantity and heat damage. It is also intended to minimize the clogging of the exhaust grill 50 at a very small load.

In the primary load determination step S330, the fan motor is driven together with the drum drive. That is, hot air is supplied into the drum. In addition, the garment in the drum can be tumbled due to drum driving. And senses the temperature of air discharged from the drum through the temperature sensor 80 while performing drum driving and hot air supply. Through such a change in temperature, it is judged whether the load caused by the clothes accommodated in the drum 2 is a temporary small load or a heavy load.

A large load means that there are many objects that absorb heat. Therefore, if the sensed temperature is high or the rate of increase of the sensed temperature is high, it means that the load is low. Therefore, it is judged whether it is a temporary small load or a heavy load through the change of the air temperature.

If it is determined that the load is a heavy load in the primary load determination step (S330), the finally determined load may be a heavy load. Therefore, it is preferable that the subsequent load determination step is omitted and drying (S400) is performed immediately. That is, it is preferable that drying (S400) according to a heavy load is performed. Thus, it is possible to prevent the operation time of the dryer from increasing due to unnecessary load determination steps.

If it is determined in the primary load determination step S330 that the load is a temporary small load, it is preferable that a secondary load determination step (S350) is performed to determine whether the load is a small amount or a very small amount. Therefore, the secondary load determination step S350 may be performed selectively.

In the secondary load determination step (S350), it is preferable to stop supplying hot air and drive the drum. Stopping the supply of hot air can be said to stop the supply of heat and air volume. Therefore, it is preferable that the driving of the heater 33 and the fan motor 35 is stopped and only the drum motor 210 is driven.

Here, the operation stop of the fan motor 35 is to prevent the clothes from moving to the exhaust grill 50 by the air flow. In addition, in order to allow the garment moved to the exhaust grill 50 to be separated from the exhaust grill 50 in the primary load determination step S330. Therefore, at this time, it is preferable that the drum is driven. That is, it is preferable to allow the clothes to move inside the drum through only the drum drive, not the wind, so that the clothes are separated from the exhaust grill 50.

Since the secondary load determination step S350 is based on the provisional small amount of load, it is only necessary to determine whether or not the load is extremely small. That is, if the load is not a very small load, it can be judged as a small load which is a load between a very small load and a heavy load.

In the case of a very small load, there is a high possibility that the clothes are introduced into the exhaust grill 50 side in the primary load determination step S330. In addition, the volume of a very small load in the drum is very small. Of course, the moisture contained in the clothes is also relatively small. Therefore, in a state in which only the drum is driven, the frequency with which the very small load contacts the dryness sensor (e.g., the humidity sensor or the electrode sensor) becomes very small. Therefore, it is possible to determine whether the load is a very small load through the value sensed by the drying degree sensor 60.

Therefore, in the secondary load determination step (S350), it is possible to finally determine whether the load is extremely small or small.

According to the control method of the dryer according to the present embodiment, it is possible to determine the load more accurately since the load is finally determined based on the values sensed by the different sensors in the load determination step of at least two stages. In addition, since a plurality of load determination steps are not always performed at all, it is possible to prevent the operation time of the dryer from unnecessarily increasing. Particularly, in the case of a heavy load during which the longest drying time is required, since only the primary load determination step (S330) is performed as described above, the operation time of the dryer increases due to the secondary load determination step (S350) .

Meanwhile, as described later, the secondary load determination step S350 may be controlled to be performed only for a fixed time period. For example, it can be controlled to be performed only for a fixed time, irrespective of whether there is a very small load or a small load. The fixed time may be one minute, for example. Accordingly, the secondary load determination step (S350) may be performed for a fixed one minute to finally determine whether it is a very small load or a small load. Therefore, it is possible to prevent the operation time of the dryer from being excessively increased due to the execution of the secondary load determination step.

When the load is determined, drying (S400) may be performed by supplying different amounts of heat and air depending on the determined load. Of course, the same can be said in the cooling (S400). However, in the case of cooling (S400), energy consumption is not large and can be performed for a relatively short time. Therefore, the air volume in the cooling (S400) can be performed in the same manner regardless of the load.

In the above-described primary load determination step (S330), the load is determined through the temperature change of the air discharged from the drum. However, this temperature change of the air is affected not only by the load but also by the initial temperature.

For example, at the same load, if the initial temperature of the dryer is very low, the temperature rise may be larger than when the initial temperature is very high. That is, when the initial temperature of the dryer is low, the temperature of the air discharged from the drum can be increased more rapidly due to the supply of heat. Therefore, the load judgment may be influenced by the initial temperature of the dryer.

Here, the initial temperature of the drier may vary depending on the temperature condition of the place where the drier is placed, seasonal conditions, whether the dryer is used immediately before or after it is used. For example, if the dryer is operated again after the drying is stopped before the cooling is performed in the high temperature environment, the initial temperature may be very high. In this case, the temperature rise is inevitably smaller than when the initial temperature is very low, assuming the same load. Therefore, it is preferable to perform the primary load determination step (S330) in consideration of the initial temperature. In other words, it is preferable to include the initial temperature sensing step (S310) in order to reduce the load determination error due to the variation of the initial temperature. It is preferable that the initial temperature sensing step S310 is performed first in the load determination S300.

That is, when the course selection (S200) is completed, the controller (S10) receives the initial temperature value through the temperature sensor (80). At this time, subsequent load determination steps are performed by reflecting the received temperature value.

Here, the initial temperature sensing step (S310) is for sensing the initial environment of the dryer, so that the driving of the heater is excluded. Then, the fan motor 35 and the drum motor 21 are driven. When the preset time elapses (for example, 5 seconds) after the start of the initial temperature sensing step S310, the initial temperature is sensed through the temperature sensor 80. [ This preset time is to detect the initial temperature of the dryer itself more precisely by drum driving and cold air supply.

Meanwhile, the initial temperature sensing step (S310), the primary load determination step (S330), and the secondary load determination step (S350) may be performed in successive consecutive intervals as needed. Therefore, it can be said to be 0 section, 1 section and 2 sections respectively.

Hereinafter, the initial temperature sensing step or the initial temperature sensing period (0 section, S310) will be described in detail with reference to FIG.

First, when an initial temperature sensing period is entered (S311), an environment for sensing an initial temperature is created (S312). At this stage, the heat supply is controlled and cold air is controlled to be supplied. And the drum is controlled to be driven. For this, the heater 33 is turned off, the fan motor is turned on, and the drum motor is turned on. The fan motor can be controlled to 2000 RPM, for example, so that the air flow rate is about the middle level. After the environmental formation step is started, a predetermined time is waited (S313) to sense the initial temperature. That is, the initial temperature of the dryer is sensed through the temperature sensor 80.

The sensed initial temperature is divided into a plurality of temperature ranges (S314, S316, S318, and S320). These temperature ranges can be divided into four types, for example.

First, it can be determined that the lowest temperature range is 29 degrees Celsius or less (S314). A temperature of 29 degrees Celsius is similar to room temperature and can represent the most common initial temperature condition. Thus, 29 degrees Celsius can be set differently. If the initial temperature satisfies the condition of 29 degrees Celsius or less, the initial temperature sensing step ends (S315) and enters the primary load determination step S330 (S331) corresponding to this temperature range.

If the initial temperature exceeds 29 degrees Celsius, step S316 may be performed to determine that the initial temperature is 39 degrees Celsius or less. 39 degrees Celsius may represent a very hot environment or the degree to which the dryer has elapsed over a period of time after termination of operation. Thus, 39 degrees Celsius can be set differently. If the initial temperature satisfies 39 degrees Celsius or less, the initial temperature sensing step ends (S317), and the primary load determination step S330 corresponding to the temperature range is entered (S331).

If the initial temperature exceeds 39 degrees Celsius, the step S318 of determining that the initial temperature is 44 degrees Celsius or less may be performed. A temperature of 44 degrees Celsius may represent a pause immediately after the end of operation of the dryer or during drying. Thus, 44 degrees Celsius can be set differently. If the initial temperature satisfies the temperature of 44 degrees Celsius or less, the initial temperature sensing step ends (S319) and enters the primary load determination step S330 corresponding to this temperature range (S331 ').

On the other hand, if the initial temperature exceeds 44 degrees Celsius, it is determined whether the temperature drops to 44 degrees Celsius or less for a predetermined time. That is, it is determined whether a predetermined period of time has elapsed (S320). If the temperature does not reach 44 degrees Celsius by this time, the initial temperature sensing step ends (S321), and the primary load determination step (S330) is omitted. That is, the primary load determination step S330 is not performed and the secondary load determination step S350 is entered (S351). If the temperature falls before the predetermined time elapses and the temperature is 44 degrees Celsius, the process goes to the primary load determination step S330 corresponding to the temperature range of 44 degrees Celsius or less (S331 ").

Here, the predetermined time may be, for example, five minutes, and the predetermined time may be set to a time for ensuring a sufficient temperature fall in a heavy load in a state where cold air is supplied. That is, when the temperature does not drop to 44 degrees Celsius or lower, for example, by cold air supply for a predetermined time, this means that the load is not large. If the load is a heavy load, the moisture content of the drum is high, and the temperature discharged from the drum may drop sharply.

Therefore, when the temperature does not fall within the set temperature range for a predetermined time, it is judged as a provisional small amount load. Of course, the initial temperature sensing step is repeated for the predetermined time (S320). That is, the initial temperature is continuously sensed and it is determined whether or not the sensed temperature is equal to or lower than the pre-set degree.

If the initial temperature is equal to or lower than the predetermined temperature (for example, 44 degrees Celsius), the primary load determination step (S330) may be performed. If the initial temperature does not satisfy the predetermined temperature or lower within the preset time (for example, 5 minutes), it is preferable that the primary load determination step (S330) is omitted and the secondary load determination step (S350) is performed Do.

In the initial temperature sensing step S310, it is possible to provide a premise for optimally determining the load through the initial temperature and / or its change. That is, the initial temperature can be divided into a plurality of ranges, and the load can be determined based on different ranges according to the divided ranges. In addition, the initial temperature sensing step (S310) may be a step that can clearly determine that it is not a heavy load. That is, when the initial temperature does not drop to the preset temperature even during the predetermined time, it is determined that the load is not a heavy load in the middle, and the subsequent primary load determination step is omitted and the secondary load determination step do. Therefore, the initial temperature sensing step may be referred to as a zero-order load determination step.

Referring to FIG. 5, the primary load determination step (S330) will be described in detail.

If it is divided into a plurality of temperature ranges in the initial temperature sensing step S310, it is preferable that the primary load determination step S330 is performed according to the divided temperature ranges.

For example, an example of dividing into three temperature ranges is shown in FIG. 5, and basically, the concepts for determining the load are the same. However, the temperature rise slope may vary depending on the initial temperature. The higher the initial temperature, the smaller the slope at which the temperature rises as the heat is supplied. Conversely, the lower the initial temperature, the greater the temperature rise slope.

First, as an example of the first temperature range, a primary load determination step (S330) according to a range in which the initial temperature is 29 degrees Celsius or less will be described.

When entering the primary load determination step S330 (S331), the RPM setting (S332) may be performed. At this time, the amount of heat is supplied, and the fan motor 35 can be controlled so that the air volume is the same as that in the zero-order load determination stage. Here, the amount of heat is preferably the maximum amount of heat. For example, it is preferable to control the heater 33 and the modulator 36 so that the heat amount is 5500 Btu / h.

Here, the primary load determination step (S330) may be referred to as a period in which initial drying is performed as well as load determination. Therefore, it is possible to supply the maximum amount of heat at the initial stage and shorten the drying time in the subsequent drying (S). Details of the RPM setting (S332) will be described later with reference to FIG.

Since the hot air is supplied, the temperature of air discharged from the drum rises in the primary load determination step (S330). However, depending on the load, the rate of temperature rise, that is, the temperature gradient, varies. When the load is a heavy load, the rate of temperature rise is relatively low, and when the load is a small load or a very small load, the temperature rise rate is relatively high. Such a temperature increase rate can be calculated in various ways, and can be calculated through a temperature rise width for a predetermined time or through an elapsed time at which a predetermined temperature rise width is generated. Needless to say, it is not necessary to calculate an absolute temperature rise rate, and it can be judged based on a reference value which can judge whether or not it is a heavy load.

For example, the upper limit of the temperature range may be 29 degrees at temperatures below 29 degrees Celsius. Therefore, when hot air is supplied, the temperature of the air discharged from the drum may increase. The reference temperature at this time, that is, the first reference temperature, can be set to 30 degrees Celsius. It is possible to set a first reference temperature which is higher than the upper limit value of the temperature range, for example, a first reference temperature which is higher by 1 degree Celsius.

After the RPM setting (S332), it is determined whether the temperature sensed by the temperature sensor is equal to or higher than the first reference temperature (S333). If it is not equal to or higher than the first reference temperature, it is determined whether the first set time has elapsed after entering the primary load determination step (S334). For example, the first set time may be set to two minutes. If the first reference temperature or more is not satisfied until the first set time elapses, this means that the load is sufficiently large. Therefore, in this case, it is determined that the load is a heavy load (S337), and drying (S400) is performed. Of course, drying at this time can be said to be drying by heavy load.

If the temperature sensed by the temperature sensor 80 after the RPM setting (S332) is equal to or higher than the first reference temperature, it is determined whether the second set temperature is satisfied within the second set time (S335). Here, the second set time may be, for example, 30 seconds, and the second set temperature may be set to be higher than the first set temperature by 5 degrees Celsius. That is, the difference between the first set temperature and the second set temperature may be set to 5 degrees Celsius. That is, it is judged whether or not the 5th degree rise in the second setting time has been performed. If the rise of 5 degrees Celsius is satisfied within the second set time, it is judged that the temperature increase rate is sufficiently large, so that it can be judged as a provisional small amount load. If the temperature rise rate is not satisfied within the second set time, the temperature rise rate is judged to be small, and thus it can be judged as a heavy load.

At this time, if it is determined that the load is a provisional small load, the system enters the secondary load sensing step for further determining whether the load is a very small load (S336). In addition, if it is determined that the load is a heavy load, the secondary load sensing step may be omitted and drying may be performed immediately. Of course, drying at this time can be said to be drying by heavy load.

As in the temperature range where the initial temperature is 29 degrees Celsius or less, it is judged whether the initial temperature is not more than 39 degrees Celsius and the initial temperature is not more than 44 degrees Celsius in the same manner. That is, steps S331 'to S337' or S331 to S337 are performed in the same manner as in steps S331 to S373.

However, it is preferable that the difference between the second reference temperature and the first reference temperature becomes smaller as the upper limit value of the temperature range becomes higher. For example, if the upper limit of the temperature range is 39 degrees Celsius, the difference between the first reference temperature of 40 degrees Celsius and the second reference temperature of 44 degrees Celsius may be 4 degrees Celsius. If the upper limit of the temperature range is 44 degrees Celsius, the difference between the first reference temperature of 45 degrees Celsius and the second reference temperature of 48 degrees Celsius can be 3 degrees Celsius.

That is, the higher the upper limit of the temperature range, the smaller the difference between the first reference temperature and the second reference temperature. This is because the higher the initial temperature, the lower the temperature rise rate, assuming that the same load and the same amount of heat are supplied. For example, it may be determined whether the temperature is increased by 5 degrees Celsius in step S335, whether the temperature is increased by 4 degrees Celsius in step S335 ', and whether the temperature is increased by 3 degrees Celsius in step S335.

Therefore, since the initial temperature is divided into a plurality of temperature ranges to determine whether it is a temporary small load or a heavy load, the load judgment error due to the initial temperature can be reduced. That is, a more accurate load determination can be made regardless of the initial temperature.

On the other hand, the second predetermined time may be the same regardless of the upper limit value of the temperature range. Therefore, it is possible to minimize the time deviation required for the primary load determination step regardless of the upper limit value of the temperature range. However, since the step of determining the primary load is a step of determining whether the load is a temporary small load or a heavy load, the required time varies depending on an absolute load. For example, in case of a very small load of 1 kg, it can be judged as a temporary small load after 30 seconds elapsed after the first load judgment step is performed. In case of a very small load of 2.5 kg, After the execution, for example, it can be judged as a temporary small load after 2 minutes and 22 seconds. In case of a heavy load of 5 kg, it is judged as a heavy load after 2 minutes and 30 seconds have elapsed after the first load judgment step is performed It can be.

Hereinafter, the RPM setting step (S332, S332 ', S332 ") described above with reference to FIG. 6 will be described in detail.

In the above-described primary load determination step S330, the RPM setting step may be performed. First, when the RPM setting step is entered (S341), the RPM of the fan motor can be set to 2000 RPM as an example of the medium air amount or more. Here, the maximum RPM of the fan motor may be 3000 RPM, for example. In addition, it is possible to control the heat amount to be 5500 Btu / h as an example. In other words, it is possible to determine the load more efficiently at the same time as the drying with the relatively high air volume and the maximum heat quantity at the beginning.

After setting the RPM of the fan motor, it is determined whether the RPM is blocked through the air flow switch 70 (S342). When it is judged that it is clogged or it is judged that there is a possibility of clogging, it can be said that the clothes cover the exhaust grill by the air volume. Therefore, in this case, it is preferable not to vary the RPM until the end of the primary load determination step. On the other hand, when it is judged that there is no fear of clogging, it is desirable to increase the air volume. For example, it is desirable to raise the maximum air volume to 2600 RPM. It is preferable that the rise of the air volume is performed in a stepwise manner. Therefore, when it is determined that there is no possibility of clogging, it is preferable to raise the RPM stepwise until the end of the primary load determination step.

Here, it can be judged that the air-flow switch is closed or opened if it is judged that the air-flow switch is blocked or judged that there is a possibility of clogging. If the closure of the aero-flow switch is detected within a predetermined time, for example, 10 seconds, upon entry of the RPM setting section, it may be judged that the exhaust grill is blocked or may be blocked. On the other hand, when the aero flow switch is not closed within a predetermined time at the time of entering the RPM setting section, it can be judged that the exhaust grill is not clogged. Of course, the RPM setting step may be performed in the same manner regardless of the plurality of temperature ranges described above.

In addition, it is possible to prevent the exhaust grill from being clogged in a case of a very small load, and to prevent the clogging of the exhaust grill, The heater and the fan motor can be prevented from being overloaded.

Hereinafter, the secondary load determination step (S350) will be described in detail with reference to FIG.

As described above, the secondary load determination step (S350) is selectively performed when it is determined as a temporary small amount load in the primary load determination step (S330). That is, if it is determined that the load is a heavy load in the primary load determination step S330, the execution of the secondary load determination step is preferably omitted.

On the other hand, it is preferable that the secondary load determination step is performed through the drying degree sensor, not the temperature sensor. That is, it is preferable to determine the load through a different sensor from the primary load determination step.

The secondary load determining step may be a step of determining whether the load is a small load or a very small load in the temporary small load. Also, it can be said that it is a step of preventing the garment from flowing into the exhaust grill in case of a very small load. Of course, when the clothes are attached to the exhaust grill, it can be said that the clothes are separated from the exhaust grill. It is possible to prevent the garment from being attached to the exhaust grill through the secondary load determination step, thereby preventing errors and preventing damage to the components of the dryer, particularly the exhaust grill.

Specifically, when the secondary load determination step S350 is entered (S351), it is preferable that the heater motor is turned off and the fan motor is turned off, and the drum motor for driving the drum is controlled to be turned on (S352). That is, only tumbling is performed and it is preferable that hot air and cold air supply are excluded. Thus, the garment can be controlled to be tumbled inside the drum without being shifted forward. This tumbling operation can be performed for a predetermined time, for example, a tumbling operation can be performed for one minute.

It is preferable that the clogging detection through the air flow sensor during the tumbling operation is excluded. This is because, when the exhaust grill is clogged for a short time, the tumbling operation is performed to separate the clothes from the exhaust grill. That is, it is not necessary to detect clogging in the step of removing the cause of clogging.

During the tumbling operation, it is determined whether a very small amount of load is applied through the electrode sensor 60 (S353). In the case of a very small load, the value sensed by the electrode sensor 60 becomes large. That is, since the volume of the clothes including water is small, the frequency of contact with the electrode sensor becomes very small. Therefore, the resistance value at both ends of the electrode sensor which is a drying sensor becomes very large. The value of such an electrode sensor is converted into an average value of a predetermined time to determine whether a very small amount of load is applied. For example, when the average value of the electrode sensor is 135 or more, the non-dimensional value is judged as a very small load, and when it is less than 135, it is judged as a small load.

Accordingly, drying (S400) proceeds according to the load determined in the secondary load determination step. Of course, drying at this time is preferably controlled so that different amounts of heat and air are supplied in case of a very small load and in a case of a small load.

Meanwhile, it is preferable that the time required for the secondary load determination step (S350) is set in advance. For example, it is preferable to proceed for 1 minute to 2 minutes. This time is constant irrespective of whether it is a very small load or a small load. Therefore, it is possible to prevent the operation time of the dryer from becoming excessively long due to the secondary load determination step in which the hot air supply is excluded. By performing the secondary load judging step for 1 minute to 2 minutes, it is possible to judge whether or not the load is extremely small, and it is possible to isolate the exhaust grill from which the very small load is attached.

In the above description, the control of the fan motor, the heater (including the modulator), and the drum motor is performed in the plurality of load sensing steps S310, S330, and S350. Hereinafter, how the fan motor, the heater (including the modulator), and the drum motor are controlled according to the detected load will be described.

As described above, since the fan motor 35 and the drum motor 21 are provided separately from each other, the air volume and the drum driving can be independently controlled. Thus, basically, drum driving in a plurality of load sensing, drying and cooling stages can be controlled such that the drum is rotated at the same RPM. Alternatively, the control of the amount of heat in the drying step may be performed in a different manner than in the load sensing steps.

First, in the case of a very small load, the drying (S400) may be performed by controlling a constant amount of heat to be supplied to the drum at a constant air volume. The heater 33 and the modulator 36 so as to supply a moderate amount of heat (for example, 3000 Btu / h) in a moderate amount of air (for example, 1500 RPM). Here, the control of the modulator 36 assumes a calorie variable. Therefore, in the case of a very small load, the same current value or the like is preferably applied to the modulator 36 so that the opening degree of the modulator is not varied.

In the case of a small load, drying (S400) as in the case of the very small load can be performed. However, it is preferable to increase the amount of heat and the amount of air compared with the case of the small load. For example, the fan motor 35, the heater 33, and the modulator 36 are controlled such that a heat quantity of a middle-to-high heat quantity (for example, 3500 Btu / h) Here, the control of the modulator 36 is based on the assumption that the amount of heat is variable. Therefore, in the case of a small load, the same current value or the like is preferably applied to the modulator 36 so that the opening degree of the modulator is not varied. That is, in the case of a very small amount of load and a small amount of load, it is desirable not to carry out the variable amount control of the amount of opening of the modulator.

It is preferable that drying (S400) is performed so that the air volume and the heat quantity are variable. It is preferable to control the amount of heat to be increased and the amount of air to be relatively decreased until the initial period after the start of drying (S400), for example, about 10 minutes elapses. That is, it is intended to increase the amount of heat that the dryer system itself has. In other words, the entire system to which hot air is supplied and discharged is heated evenly. In this interval, it is preferable that the opening of the modulator is controlled to be kept at a maximum so that a maximum amount of heat, for example, a quantity of heat of 5000 Btu / h is supplied. In addition, it is preferable to control the air volume in this section to a maximum RPM, for example, less than 3000 RPM. More specifically, it is preferable to control the air flow rate to 2600 RPM or more.

In other words, it is preferable that the supply target calorie amount and the air flow amount are larger than those in the case where the determined load is small and the load whose judgment is small is small. Here, the supply target calorie and air flow amount refer to the control target calorie and air flow rate. In other words, the larger the load level is, the larger the amount of heat is supplied and the larger the amount of air is supplied in each drying step. Of course, this can be said to be carried out in the whole area of the drying step, and it can be said that it is carried out in most of the drying step. On the other hand, as described above, the target heat quantity to be supplied can be varied. Particularly, in the case of a heavy load, the target heat quantity to be supplied or the heat quantity to be controlled at the drying stage can be varied. However, even if the control target calorific value at such a heavy load is varied, it is preferable to be larger than the control target calorie at the very small load and the small load.

Therefore, when the load is relatively small, overdrying can be prevented. On the contrary, when the load is relatively large, the under drying and overdrying can be prevented.

After the drying (S400) proceeds to some extent, for example, after about 10 minutes have elapsed, it is preferable to control the air volume so as to be shortened to shorten the drying time. That is, it is preferable that the moisture is discharged to the outside of the dryer very quickly. In this section, moisture evaporation is carried out rapidly, so moisture discharge is very important. It is preferable that the opening degree of the modulator is variably controlled in order to control the optimum amount of heat in this section. It is preferable to control so as to increase or decrease the amount of heat supplied according to the temperature of the exhausted air.

This air volume control can be performed by separately controlling the drum motor 21 and the fan motor 35 separately. In addition, the calorie control can be performed through a linear valve type electric modulator.

It is preferable that the air volume and the heat quantity are basically controlled to be higher than the air volume and the heat quantity in the above-mentioned small volume load and very small volume load drying. This calorie control is highly desirable by reducing the waste of energy while shortening the drying time. Of course, this calorimetric control can be performed through the factors sensed in the drying degree sensor 60 as well as the temperature sensor 80. [

Therefore, according to the control method of the dryer in accordance with the embodiment of the present invention, different amounts of heat and air can be supplied depending on the load to perform drying. This enables optimum drying and optimal energy efficiency regardless of load.

When the drying (S400) is completed, cooling (S500) is performed. Cooling (S500) may be performed immediately after completion of the drying (S400). The cooling (S500) may be a step of driving the drum while supplying cold air. Accordingly, the temperature of the clothes is lowered first and the temperature of the dryer system is lowered secondarily.

Conventionally, the air flow rate in the cooling (S500) is controlled to be constant. For example, in order to shorten the cooling time, cooling was performed at a maximum air flow rate (for example, 3000 RPM). In addition, the maximum air flow was set to be constant regardless of the load. This causes a problem that sudden impact noise is generated.

Generally, when the drier starts to operate, the noise due to the shock noise, that is, the sudden change in the RPM of the fan motor, is familiar to the user. For example, the user is accustomed to the shock noise generated when the fan motor runs from 0 RPM to 3000 RPM when the dryer starts to run. That is, the dryer is now starting to run.

However, the user may be confused with the sudden change in RPM of the fan motor during driving of the dryer. That is, it is suspected that there is a problem with the dryer. In particular, shock noise due to sudden RPM changes at the beginning of cooling is unfamiliar to the user.

As described above, it is preferable that the control method of the dryer according to the embodiment of the present invention has different air volume control RPMs depending on the load. In particular, it is preferable that the larger the load, the higher the airflow control RPM is controlled. For example, it is preferable to control at 3000 RPM for a medium load, 2100 RPM for a small load, and 1500 RPM for a very small load.

In the control method of the dryer according to the embodiment of the present invention, it is preferable that the air flow rate control RPM in the cooling (S500) is controlled to be equal to the air flow rate control RPM in the immediately preceding drying (S400).

The cooling (S500) will be described in more detail with reference to FIG.

When the drying (S400) is completed, the process goes to the cooling (S500) (S501) and the current temperature is measured (S502). That is, the temperature of the dryer system is measured through the temperature sensor 80. Then, it is determined whether the predetermined cooling time (S500) has elapsed (S503). That is, it is determined whether the remaining time satisfies 0 or not.

When the remaining time is 0, cooling (S500) ends (S504). If the remaining time remains, the measured current temperature is compared with the cooling target temperature (S505). Of course, if the current temperature is lower than the cooling target temperature, the cooling (S500) ends (S504).

Here, if the remaining time remains and the current temperature is higher than the cooling target temperature, cooling is performed while supplying cool air (S506). That is, cooling can be started or sustained in earnest.

It is preferable that the air flow rate control RPM at the start and / or the continuation of the cooling (S506) is not previously set and is controlled to the immediately preceding air flow rate control RPM. For example, if drying is terminated at 1500 RPM, the airflow control RPM at cooling is preferably 1500 RPM. When the drying is completed at 3000 RPM, it is preferable that the air flow rate control RPM at the cooling is 3000 RPM. Therefore, RPM of the fan motor is maintained when it is passed from drying to cooling, so that the generation of shock noise can be prevented. This makes it possible to prevent the user from suspicion of a failure of the dryer in advance.

Hereinafter, the user interface 200 of the dryer according to the embodiment of the present invention will be described in detail with reference to FIG.

The control panel 115 shown in FIG. 1 may include various buttons or a display for the user interface. This user interface 200 can be controlled via the controller 10, which controls the operation of the dryer based on the information input via the user interface 200

First, a status LED 210 may be provided to allow the user to determine whether the duct is clogged or what is the ongoing drying step. That is, it can be determined whether the drying (S400) is in progress or the cooling (S500) is in progress.

A course or cycle button 230 may be provided. The plurality of buttons 230 may be provided for each course or cycle. For example, the high temperature course button 231, the medium temperature course button 232, the low temperature course button 233, and the heatless course button 234 may be provided. These buttons may be provided for the user to select the course. However, as described below, at least one of the buttons 231, 232, 233, and 234 may be used to enter a user menu or a service menu.

Display LEDs 200 may be provided to indicate the remaining time of the drying course to be performed. Such a display LED may be provided to display four digits. Such a display LED 220 may be used to change program parameters after entering a service menu as described below.

A start button 240 may be provided to input the start of the execution of the drying in which the course is selected.

When the user selects a specific course through the course button 230 and applies a start command via the start button 240, the controller 10 performs drying according to the selected specific course.

Hereinafter, an electric modulator 36 applicable to a dryer according to an embodiment of the present invention will be described in detail.

The modulator 36 includes a body 360 and an outlet 364 may be formed on the other side of the inlet 365 on one side of the body. After the gas is introduced through the inlet, the gas is discharged through the outlet. The discharged gas flows into the heater. Therefore, the higher the pressure of the gas to be discharged, the greater the amount of heat generated by the heater.

Various configurations for controlling the gas pressure may be provided on the upper side of the body.

First, a pressure check hole 366 for checking the inlet gas pressure may be provided. The pressure check hole 366 is provided with a screw, and the pressure gauge can be inserted into the pressure check hole 366 by unscrewing the screw. Therefore, the inlet gas pressure can be checked through this.

A pressure check hole 367 for checking the outlet gas pressure may be provided. The structure and pressure check method can be the same as the inlet gas pressure.

By checking the inlet gas pressure and the outlet gas pressure, the outlet gas pressure can be adjusted. That is, the gas pressure supplied to the heater can be adjusted. This gas pressure adjustment can be performed by mechanically adjusting the opening of the modulator.

The body 360 may be provided with a structure for adjusting the gas pressure. A maximum pressure setting nut 363 and a minimum pressure setting nut 361 for adjusting the gas pressure may be provided. In addition, a protective cap 361 may be provided to cover the minimum pressure setting nut 361 and the maximum pressure setting nut 361 in order to protect them.

To adjust the gas pressure, the user can first tighten or loosen the maximum pressure setting nut 363 by lifting the protective cap 361 first. The tightening of the nut 363 reduces the maximum opening degree, thereby lowering the maximum pressure. On the contrary, loosening the nut 363 increases the maximum opening degree, thereby increasing the maximum pressure.

In addition, the user can tighten or loosen the minimum pressure setting nut 361. Through this, the minimum opening degree can be increased or decreased. The reduction of the minimum opening is to reduce the minimum pressure whereas the increase of the minimum opening is to increase the minimum pressure.

That is, by operating the nut 363, the maximum pressure and the minimum pressure can be set differently. Of course, this maximum pressure setting and the minimum pressure setting are made at the manufacturing site of the dryer, and it is not easy to adjust the maximum pressure setting at the site where the dryer is used directly. This is because this requires separating the panels of the dryer and ensuring sufficient working space.

The problem is that the external gas pressure, i.e. the external gas pressure supplied to the dryer, may not be constant. Further, even if the external gas pressure is constant, the gas pressure actually supplied to the heater can be varied due to dispersion of the modulator.

As described above, the modulator 36 may be a gas valve that changes the opening degree in proportion to the current value or the voltage value applied to the electric modulator. And, these electric modulators do not have a device for manually controlling the gas pressure. That is, only the device for manually adjusting the maximum pressure value and the minimum pressure value is provided, and there is no device for manually adjusting the pressure value between the maximum pressure value and the minimum pressure value. Therefore, it is necessary to manually adjust the opening degree of the modulator.

Basically, the modulator 36 is provided with a wiring terminal 368. The gas supply pressure can be controlled between the maximum pressure value and the minimum pressure value by adjusting the voltage or current value applied across the connection terminal 368. [

The problem is that, for example, when the constant voltage value is applied, the same degree of opening, that is, the same gas pressure, is difficult to provide. This can be attributed to the dispersion of the modulator itself. There is a possibility that the target gas pressure may not be satisfied due to a deviation of the electromagnetic force due to the modulator inner coil or a mechanical tolerance of the valve itself.

For example, it can be pre-programmed to apply 16.5 V across the connection terminal 368 and 8.24 V for an intermediate calorie (2500 Btu / h) supply for a maximum calorie (5000 Btu / h) supply.

That is, the controller 10 can control the voltage value corresponding to the required calorie value to be supplied to the modulator. However, as described above, the lookup table between the calorific value and the voltage value becomes inaccurate due to the scattering influence of the modulator.

Therefore, the modulator can not sufficiently reflect the amount of heat (through the predetermined voltage value application) instructed by the controller 10. [ For example, the degree of opening may be increased so that the amount of heat is larger than the indicated amount of heat, or the degree of opening may be reduced so that the amount of heat is smaller than the indicated amount of heat.

According to an embodiment of the present invention, there is provided a dryer capable of minimizing the scattering effect of an electric modulator. It is also intended to provide a dryer capable of manually adjusting the supply pressure by the modulator. Of course, manual adjustment of the opening of such a modulator should only be authorized by the administrator. That is, it is desirable for the general user to make such adjustment difficult.

According to an embodiment of the present invention, there is provided a dryer that adjusts the opening degree of a modulator through a manager menu to optimally adjust a heat amount in a positive country.

The entry of the manager menu can be performed variously. The user can enter the administrator menu through a toggle switch (provided in a position where the general user is difficult to access) provided in the dryer. In addition, entry and use of an administrator menu may be possible through the user interface 200. [ At this time, it is preferable to use a special use method rather than a general usage method. Of course, by entering the service card, you can also enter the admin menu.

As shown in Fig. 9, by pressing the high-temperature course button 231 and the low-temperature course button 233 at the same time, it is possible to enter the manager menu. More precisely, the high temperature course button 231 and the low temperature course button 233 are pressed at the same time, and then the medium temperature course button 232 is pressed three times to enter the manager menu. That is, the user can enter the administrator menu through a user interface in the form of a hidden key or a hidden button.

A specific indication may be displayed on the display LED 220 when entering the administrator menu. These specific indications can be used to confirm entry into the Admin menu.

After entering the manager menu, the desired modulator opening control menu can be entered by pressing the buttons appropriately. The modulator opening degree can be adjusted by pressing the buttons appropriately while confirming specific indications displayed on the display LED 220. In other words, the predetermined voltage value or current value can be changed. Of course, the voltage value or the current value can be changed into the pulse value form.

For example, if the opening of the modulator tends to be larger than the reference value, the voltage value can be lowered in the manager menu. Conversely, if the opening of the modulator tends to be smaller than the reference value, the voltage value can be increased in the manager menu.

Specifically, when the degree of opening of the modulator tends to be greater than the reference value, the voltage value of each modulator may be lowered by a predetermined unit based on a voltage value table corresponding to each of a plurality of heat amounts and a plurality of heat amounts. Of course, in the opposite case, it can be increased by a predetermined unit. In other words, a new table or a corrected table can be created through the manager menu. This allows a more accurate calorimetric control to be performed despite the spread of the modulator.

On the other hand, the influence of the scattering of the modulator can be grasped by measuring the outlet gas pressure described above. For example, outlet gas pressure can be measured at the point where maximum calories are needed. When the outlet gas pressure is larger than the reference value, it can be seen that the opening degree is larger than the reference value due to the dispersion of the modulator, and it can be seen that the opening degree is smaller than the reference value.

As described above, in the control method of the dryer according to the embodiment of the present invention, the heat quantity is controlled through the opening of the modulator. Therefore, it is preferable that the opening degree of the modulator is adjusted according to the set calorie amount. This will help prevent over-drying, prevent under-drying and reduce energy waste.

In particular, in the case of a heavy load, the opening degree is adjusted to be variable. By controlling the opening degree through the manager menu, more effective calorie control can be performed.

100: dryer 1: cabinet
2: Drum 3: Air supply part
10: controller 21: drum motor
33: heater 35: fan motor
36: Modulator 60: Dryness sensor
70: air flow switch 80: temperature sensor
200: User interface

Claims (41)

The drum and the fan motor are driven to supply the hot air to the inside of the drum and the load caused by the clothes accommodated in the drum is changed to a temporary small amount load A primary load determining step of determining whether the load is a heavy load;
Wherein the drying is performed selectively when the primary load is determined to be a temporary small amount load in the primary load determination step and the hot air supply is stopped and the drum is driven, A secondary load determining step of determining whether the load is a very small load; And
And a drying step of performing drying in accordance with the load determined in the primary or secondary load determination step,
If it is determined that the temperature change of the air is larger than the preset range, the control unit determines that the load is a temporary small load. If the temperature change of the air is smaller than the predetermined range, it is determined that the load is heavy. The control method of the dryer that omits the secondary load determination step.
The method according to claim 1,
Wherein in the drying step, when the determined load is large, the target heat quantity of the heater and the target RPM value of the fan motor are larger than when the determined load is low. 3. The method of claim 2,
Wherein when the determined load is a small load and a very small load, the amount of heat supplied to the heater and the RPM value of the fan motor are constantly controlled in the drying step. 3. The method of claim 2,
Wherein when the determined load is a heavy load, the amount of heat supplied to the heater and the RPM value of the fan motor are controlled to vary in the drying step. 5. The method of claim 4,
Wherein the amount of heat supplied to the heater is controlled so as to gradually decrease, and the RPM value of the fan motor is controlled to gradually increase. The method according to claim 1,
And an initial temperature sensing step of sensing the temperature in the temperature sensor before the primary load determination step,
Wherein the driving of the heater is excluded and the fan motor and the drum are driven in the initial temperature sensing step. The method according to claim 6,
Wherein the detection of the initial temperature is performed after a predetermined time elapses after the start of driving the drum and the fan motor. The method according to claim 6,
Wherein the course input step is performed to input the drying course before the initial temperature sensing step, and the initial temperature sensing step is performed first in the input drying course. The method according to claim 6,
Wherein the primary load determination step is performed when the initial temperature sensed in the initial temperature sensing step is lower than a predetermined temperature. 10. The method of claim 9,
Wherein the initial temperature sensing step repeats the initial temperature sensing step for a preset time period when the initial temperature sensed in the initial temperature sensing step exceeds the preset temperature. 11. The method of claim 10,
If the sensed initial temperature is lower than the predetermined temperature during the initial temperature sensing step, the primary load determination step is performed. If the initial temperature exceeds the predetermined temperature, the primary load determination step Wherein the second load determination step is omitted. 10. The method of claim 9,
Wherein the primary temperature determination step is performed by dividing the initial temperature sensed in the initial temperature sensing step into a plurality of temperature ranges. 13. The method of claim 12,
If the temperature detected by the temperature sensor during the first set time does not satisfy the first reference temperature or higher that is higher than the upper limit temperature of the temperature range in the first load determination step that is divided into the plurality of temperature ranges, And the second load determination step is omitted. 14. The method of claim 13,
In order to determine whether the temperature sensed by the temperature sensor within the first predetermined time period satisfies the first reference temperature or higher, whether it is a temporary small amount load or a heavy load, And calculating an increasing rate of the temperature sensed by the temperature sensor. 15. The method of claim 14,
Wherein the increase rate of the temperature is determined as high / low by whether the second reference temperature is higher than the first reference temperature within a second set time. 16. The method of claim 15,
Wherein the controller determines that the load is a temporary small load when the temperature rise rate is high and determines that the load is a heavy load when the temperature is low. 17. The method of claim 16,
Wherein the difference between the second reference temperature and the first reference temperature is smaller in a higher temperature range and the second set time is the same regardless of the temperature range in the plurality of temperature ranges. 15. The method of claim 14,
Wherein in the plurality of temperature ranges, the first set time is all the same. The method according to claim 1,
Wherein the first load determination step includes an RPM setting step of raising the RPM of the fan motor. 20. The method of claim 19,
Wherein the step of setting the RPM is a step of increasing the RPM in a stepwise manner. The method according to claim 1,
Wherein the amount of heat supplied to the heater is controlled to a maximum in the first differential load determination step. The method according to claim 1,
Wherein the second load determination step is performed for a predetermined time. The method according to claim 1,
Wherein the duct clogging detection through the air flow switch is excluded in the first and second load determination steps and is performed in the drying step. The method according to claim 1,
Further comprising a cooling step of driving the fan motor together with the drum driving to supply a cool air into the drum after the completion of the drying step,
Wherein the fan motor is controlled to operate at the immediately preceding RPM in the cooling step. A method of controlling a dryer for drying clothes by supplying hot air into a drum,
An initial temperature sensing step of sensing an initial temperature to grasp an initial environment of the dryer;
A primary load determining step of determining whether the load caused by the clothes is a temporary small load or a medium load through a temperature sensor provided for supplying hot air into the drum and detecting the temperature of the air discharged from the drum;
A second load determination process for determining whether the load is a small load or a very small load through a drying degree sensor provided in the drum, step; And
And a drying step of performing drying in accordance with the extremely small load, the small load and the heavy load determined in the primary or secondary load determination step,
Wherein the primary load determination step is performed for each of a plurality of different temperature ranges depending on the temperature sensed in the initial temperature sensing step,
Wherein in the initial temperature sensing step, the driving of the heater is eliminated, and the fan motor and the drum are driven.
delete A drum for receiving clothes;
A drum motor for driving the drum;
A fan motor provided separately from the drum motor and generating a flow of air;
An exhaust passage provided to discharge the air discharged from the drum to the outside;
A temperature sensor for sensing the temperature of the air discharged from the drum;
A drying degree sensor provided inside the drum for sensing the degree of drying through the contact frequency with the clothes;
An air flow switch for sensing whether the path through which the air flow is performed is blocked;
A heater for heating the air; And
The load detected by the temperature sensor detects whether the load caused by the garment is a temporary small load or a heavy load. If the load is a small load, And a controller for controlling the drum motor, the fan motor, and the heater so as to perform drying with different amounts of heat and air volume according to the determined loads,
The controller determines that the temporary small load is the small temporary load and the medium large load load when the initial temperature sensed by the temperature sensor exceeds the maximum value of the temperature range and does not satisfy the maximum value or less for a predetermined time, Is omitted.
28. The method of claim 27,
Wherein the controller determines whether the temporary small amount load and the heavy amount heavy load are present in each of a plurality of temperature ranges according to an initial temperature sensed by the temperature sensor. delete 28. The method of claim 27,
Wherein the controller omits the determination of the small load and the extremely small load when it is determined that the medium small load and the medium load are heavy loads. A dryer for judging a load of clothes accommodated in a drum and performing drying by supplying different amounts of heat and air according to the determined load,
(1 section) through the temperature sensor for sensing the temperature of the air discharged from the drum,
If it is judged as a temporary small load,
And a controller for judging a small amount of load and a very small amount of load (two sections) through a drying degree sensor for sensing the degree of drying using the frequency of contact with the clothes in the drum,
The controller comprising:
Controls the drum motor, the heater, and the fan motor so that the drum is driven and the maximum amount of heat is supplied,
And controls the drum motor, the heater, and the fan motor so that the drum is driven and hot air is not supplied in the two sections.

32. The method of claim 31,
The controller comprising:
If it is determined that the load is heavy,
And the determination of the small load and the extremely small load is omitted. 32. The method of claim 31,
The controller comprising:
Wherein the determination unit determines whether the temporary small amount load and the medium amount large amount load are satisfied in each of a plurality of temperature ranges according to an initial temperature sensed by the temperature sensor. 34. The method of claim 33,
The controller determines that the preliminary small load is a load (0 period) when the initial temperature exceeds the maximum value of the temperature range and does not satisfy the maximum value or less for a predetermined time, Is omitted. 35. The method of claim 34,
The controller comprising:
Wherein the controller controls the drum motor, the heater and the fan motor so that the drum is driven and the cold air, not the hot air, is supplied in the zero section. delete 32. The method of claim 31,
The controller comprising:
Wherein the control unit senses whether the air flow is blocked through the air flow switch in the first section and controls the RPM of the fan motor to increase so as to increase the air flow when there is no clogging of the air flow. 32. The method of claim 31,
The controller comprising:
And controls the drum motor, the heater, and the fan motor so that the drum is driven and the cold air and the hot air are not supplied in the two sections. 32. The method of claim 31,
The controller comprising:
And controls the drum motor, the heater, and the fan motor to supply different amounts of heat and air depending on the determined load. 40. The method of claim 39,
The heater includes a gas burner,
And a modulator for adjusting the amount of heat by controlling the gas pressure supplied to the gas burner by varying the opening degree in proportion to the applied current value or the voltage value. 40. The method of claim 39,
The controller comprising:
And controls the opening degree of the gas valve only when the determined load is a heavy load.

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