WO2009148248A2

WO2009148248A2 - Dryer and control method for same

Info

Publication number: WO2009148248A2
Application number: PCT/KR2009/002931
Authority: WO
Inventors: 정기욱; 김명종
Original assignee: (주)엘지전자
Priority date: 2008-06-03
Filing date: 2009-06-02
Publication date: 2009-12-10
Also published as: WO2009148248A3; KR101016817B1; KR20090126136A

Abstract

The present invention relates to a dryer and a control method for same, and more particularly, to a dryer control method including a temperature raising step of shutting off a discharge of hot air from the inside of a drum and starting a supply of hot air such that the temperature of the inside of the drum is raised to a reference temperature in a quicker manner than a normal drying operation; and a drying step of supplying hot air to the inside of the drum to dry articles after shutting off the discharge of the hot air. Accordingly, the present invention is capable of reducing thermal damage to articles by instantaneously raising the temperature of the inside of the drum in accordance with a proposed drying algorithm so that a small quantity of articles to be dried may contact high-temperature hot air for a short period of time.

Description

Dryer and its control method

The present invention relates to a dryer and a method for controlling a dryer, wherein when a small amount of dry matter is initially dried in a drum for a long time with a small amount of dry matter, the dry matter may be dried more than necessary to prevent thermal damage to the dry matter. To a dryer and a dryer control method.

In addition, the present invention relates to a dryer and a dryer control method which can reduce energy waste generated by continuing the drying process according to a set algorithm even when a small amount of cloth is sufficiently dried.

In general, a dryer is a kind of home appliance that normally cleans laundry, that is, clothes by using high temperature air, and heats a drum accommodating a dry object, a driving source for driving the drum, and air introduced into the drum. And a blower unit for sucking or discharging air in the drum.

Dryers can be classified into various dryers according to the criteria for classification. First, the dryer may be classified into an electric dryer and a gas dryer according to a method of heating air, that is, a heating means. The electric dryer heats air using electric resistance heat, and the gas dryer heats air using heat generated by combustion of gas.

In addition, the dryer may be classified into a condensation type dryer and an exhaust type dryer according to a treatment method of wet air generated while drying a dry item. In the condenser dryer, the air that has been heat-exchanged with the dry matter in the drum is circulated without being discharged to the outside of the dryer, and in a separate condenser, heat is exchanged with the outside air to make condensate and discharged to the outside. In the exhaust dryer, the air, which has been heat exchanged with the dry matter in the drum and becomes humid, is discharged directly to the outside of the dryer.

In addition, the dryer may be classified into a top loading method and a front loading method according to a method of introducing a dry matter into the dryer. In the top loading method, the dry material is introduced from the upper side of the dryer. In the front loading method, the dry material is injected from the front of the dryer.

Dryer according to the prior art as described above is a device for drying the dry object using a high temperature heat regardless of the classification method, and performs the drying administration for the same time according to the algorithm determined irrespective of the amount of the dry matter.

Therefore, the dryer according to the prior art as described above is a long time to be exposed to high temperature hot air in the case where the stored items are a small amount of clothing, so that the drying process continues even though the dried items are dried more than necessary or have been sufficiently dried. There was a problem that not only damaged the fabric, but also wasted energy.

The present invention was devised to solve the above-mentioned problems of the prior art, and when a small amount of the dry matter is initially heated in a drum with a small amount of dry matter over a long period of time, it is dried more than necessary to heat the dry matter. The purpose is to prevent damage.

In addition, an object of the present invention is to reduce the energy consumption caused by continuing the drying process according to a set algorithm even when a small amount of cloth is sufficiently dried.

Dryer control method according to an embodiment of the present invention is to sharply increase the hot air temperature by blocking the discharge of hot air and the inflow of cold air from the inside of the drum so that the temperature inside the drum is higher than the normal drying operation to reach the reference temperature Heating process; And a drying process of supplying hot air into the drum and drying the dried object after the blocking of the hot air discharge is released.

The rapid heating process and the drying process can be controlled according to the hot air temperature.

The rapid temperature increase process includes a step of blocking the hot air discharge and cold air inflow by rotating the blowing fan for hot air supply in reverse; A rapid warming-up step of supplying only hot air into the drum such that the blowing fan rapidly rises to reach a reference temperature than when the blowing fan rotates forward; And a release step of releasing the blocking of the hot air discharge by stopping the blower fan.

The drying process includes a hot wind supply step of supplying and discharging hot air into the drum by forwardly rotating the blower fan; And a cooling step of cooling the dry items of high temperature contained in the drum by the supplied hot air.

The rapid temperature rising process and the drying process include: a time measuring step of detecting a performance time of each step; It is possible to further include a; temperature detection step for measuring the temperature of the hot air discharged in each step.

The sudden temperature increase step may be controlled according to the detected hot air temperature and the measured execution time. In more detail, the sudden temperature increase step is performed until the measured temperature rises to reach the reference temperature or until the measured execution time reaches the reference time.

The rapid temperature raising process and the drying process may be characterized in that when the supply of hot air starts, the heaters having different capacities are sequentially operated after a predetermined time interval after the operation of the blowing fan.

The drying process preferably further includes a twist prevention step of reversely rotating the drum to prevent twisting of the dry matter contained in the drum.

The cooling step is characterized in that the drum is repeated at a standard cooling time interval, and the drum is reversely rotated to prevent twisting of the dry matter immediately before the end of the cooling.

According to one embodiment of the present invention, a dryer includes a drum, a heater unit, a blower fan, and a motor for driving the drum and the blower fan. And a control unit controlling the blower fan, the heater unit, and the motor so that the temperature rises rapidly.

The blowing fan is reversely rotated to block hot air discharge and inflow of cold air from the inside of the drum, thereby rapidly increasing the temperature inside the drum than during the forward rotation.

The heater unit is characterized in that it comprises a high capacity heater and a low capacity heater.

The dryer may additionally display a display unit that displays a process in which the dry matter in the drum is processed.

The present invention is to reverse the blowing fan of the dryer to block the hot air discharge inside the drum and supply only the hot air into the drum, thereby increasing the temperature inside the drum instantaneously to shorten the time for a small amount of the dry matter in contact with the hot air It is effective to reduce thermal damage.

In addition, the present invention has the effect of reducing the energy consumption caused by continuing the drying process according to the set algorithm even when a small amount of cloth is sufficiently dried.

Figure 1 shows a cross-sectional view of the dryer according to an embodiment of the present invention.

2 is a block diagram illustrating a control unit of a dryer according to an embodiment of the present invention.

3 is a flowchart illustrating a dryer control method according to an embodiment of the present invention.

4 is a control flowchart of a motor and a heater for rapidly increasing an initial temperature of a dryer according to an embodiment of the present invention.

FIG. 5 is a control flowchart of a motor and a heater for terminating a sudden increase in initial temperature of a dryer according to an embodiment of the present invention.

6 is a control flowchart for a motor and a heater for resuming hot air supply to a dryer according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings a specific embodiment of the present invention will be described in detail.

Hereinafter, in order to explain a dryer according to an embodiment of the present invention, a front loading method, an electric type, and a condensation type dryer will be described as examples. However, the present invention is not limited thereto, and of course, the present invention may be applied to a top loading method, a gas type, a condensation type dryer, or the like.

1 to 2, a dryer according to an embodiment of the present invention will be described in detail.

1 is a cross-sectional view of a dryer according to an embodiment of the present invention, Figure 2 is a block diagram showing a control unit of a dryer according to an embodiment of the present invention.

As shown in FIG. 1 illustrating a cross-sectional structure of the dryer, the dryer forms an exterior and a cabinet 110 having a door 111 formed on the front surface thereof, and a drum 112 rotatably installed in the cabinet 110. And, the hot air guide duct 113 for guiding the hot air into the drum 112, the hot air discharge duct 114 for discharging the hot air passed through the interior of the drum 112, and the outside air is sucked out And a temperature detector 222 for detecting a temperature of hot air discharged through the hot air discharge duct 114.

The opening 16 is formed in the front of the cabinet 110 in which the door 111 is mounted to inject or take out clothes into the drum 112. The drum 112 is rotated at a low speed by the motor 117 installed at the bottom of the cabinet 110. The motor 117 is provided to drive the drum 112 and the blowing fan 115 at the same time. To this end, the drive shaft 118 of the motor 117 extends to both sides of the motor 117. One end of the drive shaft 118 is connected to the blowing fan 115, and the other end thereof is connected to the pulley 119 for rotating the drum 112. The pulley 119 is connected to the belt 120 is installed to surround the drum (112).

Hot air discharge duct 114 is disposed between the lower portion of the front of the drum 112 and the blowing fan 115, the filter 121 is installed at one end thereof, such as lint or the like contained in the hot air passed through the drum 112 It will filter foreign matter. The outlet of the blower fan 115 is made of a cylindrical pipe, and the exhaust duct 122 whose open end extends out of the cabinet 110 is coupled. An opening / closing valve 123 is installed at the open end of the exhaust duct 122. When the blower fan 115 is operated, the exhaust duct 122 is opened by hot air. When the blower fan 115 is not operated, the exhaust duct 122 is opened. Closing the duct 122 prevents foreign matter from flowing in from the outside.

The heater unit 125 is installed on the upper portion of the hot air guide duct 113, and as the blowing fan 115 and the drum 112 rotate by the driving of the motor 117, external air passes through the heater unit 125. While being heated is introduced into the drum 112 through the hot air guide duct 113. Therefore, the clothes put into the drum 112 are dried by the hot air, while the hot air passing through the drum 112 is discharged to the outside through the hot air discharge duct 114 and the exhaust duct 122.

The heater unit 125 includes a high capacity heater 131 of 1750W and a low capacity heater 132 of 750W.

On the other hand, the predetermined position of the cabinet 110 is a steam generator (not shown) of a method of generating a steam by heating a predetermined amount of water contained in a water tank (not shown) with a heater 240 (hereinafter referred to as "heat heating method" for convenience). Is installed). However, the present invention can be used as a steam generator any device that can generate steam. For example, it is also possible to install a heater directly around the water supply hose through which the water passes, that is, to heat the water without accommodating the water in a predetermined space (hereinafter referred to as "tube heating method" for convenience).

Referring to FIG. 2, the controller 210 will be described in detail as follows.

The predetermined position of the dryer according to the present invention is provided with a control unit 210 for controlling the motor 117 and the heater 125 to adjust the hot air supply and cooling for the dry matter, the time of the hot air supply and cooling process The time measurement part 221 to measure and the temperature detection part 222 which detects the temperature of the hot air discharged from the drum 112 are provided.

The temperature detector 222 is provided at a predetermined position of the hot air discharge duct 114 to detect a temperature of hot air discharged through the hot air discharge duct 114. The time measuring unit 221 measures the time when the hot air generated by the heater unit 125 is supplied into the drum 112, and the time when the dry matter inside the drum 112 is cooled. The controller 210 controls the heater unit 125, the blowing fan 115, and the motor 117 based on the information collected from the various components of the above-described dryer including the detected temperature, the measured time, and the like. Control the operation of the dryer.

The temperature detector 222 detects a temperature of hot air discharged from the drum 112. The controller 210 controls the on-off of the heater 125 according to a result of determining whether the detected temperature is a value within a preset temperature range. In addition, the time measuring unit 221 measures the time during which the hot air generated by the heater 125 is supplied into the drum 112. The controller 210 controls a process of processing a dry object based on a result of comparing the measured time or detected temperature with a preset time or temperature.

The controller 210 reversely rotates the blower fan 115 to prevent the hot air from being discharged from the drum, and when blocking the inflow of cold air, the controller 210 sequentially switches the high-capacity heater 131 of 750W and 750W at a predetermined time interval. The low capacity heater 132 is controlled to be turned on.

Even when the reverse rotation of the blower fan 115 is stopped and the forward rotation is performed after a predetermined time, the controller 210 sequentially turns off the high capacity heater 131 and the low capacity heater 132 at a predetermined time interval, and then again performs a predetermined operation. The high capacity heater 131 and the low capacity heater 132 are sequentially turned on at a time interval.

In the present embodiment, the position of the temperature detector 222 is provided in the hot air discharge duct 114, but may be provided in the hot air guide duct 113 or the drum 112. The temperature detector 222 is more preferably provided inside the drum 112 to directly measure the temperature of the drum 112.

In addition, the dryer according to the present embodiment includes a heater unit 125 composed of a high capacity heater 131 and a low capacity heater 132, but may be replaced with a single large capacity heater.

3 to 6, a dryer control method according to an embodiment of the present invention will be described in detail.

3 is a flowchart illustrating a dryer control method according to an embodiment of the present invention. 4 and 5 are control flowcharts for a motor and a heater for raising the initial temperature of the dryer according to an embodiment of the present invention, and a control flowchart for the motor and the heater for terminating the initial temperature rising process. 6 is a control flowchart for a motor and a heater for resuming hot air supply to a dryer according to an embodiment of the present invention.

Dryer control method proposed in the present invention is a rapid temperature rise process to increase the hot air temperature by blocking the discharge of hot air and the inflow of cold air from the inside of the drum so that the temperature inside the drum rises sharply than the normal drying operation (S310) )and; After the blocking of the hot air discharge is released, a hot air is supplied into the drum to dry the dry item (S320).

Here, the rapid temperature increase process and the drying process may be controlled according to the hot air temperature.

When the dryer starts to operate according to the proposed algorithm, first, the controller 210 controls the motor 117 so that the blowing fan 115 reversely rotates (S411). When the blowing fan 115 reversely rotates, the discharge of hot air from the drum 112 is blocked, and cold air from the condensation process of the hot air is prevented from flowing into the drum 112 (S311).

In addition, the control unit 210 turns on the high-capacity heater 131 of 1750W 5 seconds after the blowing fan 115 begins to rotate in reverse to supply hot air into the drum (S412), and again after 750W after 5 seconds. The heater unit 125 is controlled to turn on the low capacity heater 132 (S413). In such a case, the hot air supply amount is about 30% of the hot air supply amount at the time of forward rotation.

The control operation of the controller 210 allows the hot air inside the drum 112 to reach the reference temperature in a shorter time than when the blowing fan 115 rotates forward.

The control unit 210 measures the hot air temperature Temp_h detected by the temperature detector 222 and the execution time Time_h measured by the time measuring unit 221, the respective reference temperatures Temp and the reference time Time_ref. Are compared (S321, S313).

First, the controller 210 first determines whether the detected hot air temperature has reached the reference temperature. If the detected temperature reaches the reference temperature, the controller 210 determines whether the measured execution time has reached the reference time.

If the detected hot wind temperature or the measured execution time reaches the reference temperature or reference time, the process proceeds to the next step S313.

Here, the reference temperature is 60 ℃, the reference time is preferably 15 minutes.

According to the determination result, the control unit 210 turns off the high capacity heater 131 (S511), turns off the low capacity heater 132 (S512), and the blower fan 115 stops the reverse rotation (S513). 117 is controlled (S313).

As described above, the drying process (S320) is started after the sudden increase in temperature of the hot air (S310).

First, the control unit 210 controls the motor 117 so that the blowing fan rotates forward (S611), and turns on the high capacity heater 131 of 1750 W 5 seconds after the blowing fan 115 starts the forward rotation ( S612), the heater unit 125 is controlled to turn on the low-capacity heater 132 of 750W again after 5 seconds (S613).

The controller 210 performs a cooling step (S322) of cooling the dry items to which the hot air is supplied at a reference cooling time interval. Here, the reference cooling time interval is preferably 3 minutes.

The drying process (S310) preferably further includes a twist prevention step of rotating the drum back to prevent twisting of the dry matter contained in the drum.

The cooling step S332 reversely rotates the drum just before the end to prevent the object from being twisted. Here, the reverse rotation of the drum is preferably performed 1 minute before the end of the cooling step (S332).

The present invention is not limited to the above-described embodiments, and it is possible to use various principles of the present invention, and these belong to the scope of the present invention.

Claims

A steep temperature rising step of blocking hot air discharge and inflow of cold air from the inside of the drum to rapidly increase the hot air temperature so that the temperature inside the drum rises more rapidly than in normal drying operation to reach a reference temperature;

And a drying step of supplying hot air into the drum to dry the dry item after the blocking of the hot air discharge is released.
The method of claim 1,

Each process is a dryer control method, characterized in that controlled according to the hot air temperature.
The method of claim 1, wherein the temperature increase process

A blocking step of rotating the blowing fan for supplying hot air to block hot air discharge and cold air inflow into the drum;

A rapid warming-up step of supplying only hot air into the drum such that the blowing fan rapidly rises to reach a reference temperature than when the blowing fan rotates forward;

And a release step of releasing the blocking of the hot air discharge by stopping the blower fan.
The method of claim 1, wherein the drying process

A hot wind supply step of rotating the blower fan forward to supply and discharge hot air into the drum;

And a cooling step of cooling the hot and dry items contained in the drum by the supplied hot air.
The method of claim 3 or 4, wherein each of the processes

A time measurement step of detecting an execution time of each step;

And a temperature detection step of measuring a temperature of hot air discharged at each step.
The method of claim 5,

The sudden temperature increase step is controlled according to the detected hot air temperature and the measured execution time.
The method of claim 6,

The steep rise step is carried out until the measured temperature rises until the reference temperature or the measured execution time reaches a reference time characterized in that the dryer control method.
The method according to claim 3 or 4,

Wherein each process is a dryer control method characterized in that for starting the hot air supply sequentially operates heaters of different capacities at predetermined time intervals after the operation of the blowing fan.
The method of claim 4, wherein

The drying process is a dryer control method, characterized in that it further comprises a twist prevention step of rotating the drum back to prevent twisting of the dry matter contained in the drum.
The method of claim 4, wherein

The cooling step is a dryer control method, characterized in that for repeating the dry object at a reference cooling time interval.
The method of claim 10,

And said cooling step reversely rotates said drum immediately before termination to prevent twisting of said dry matter.
In the dryer provided with a drum, a heater unit, a blowing fan, and the motor which drives the said drum and a blowing fan,

And a controller configured to control the blower fan, the heater unit, and the motor to reversely rotate the blower fan so that the temperature of the hot air inside the drum rises rapidly.
The method of claim 12,

And the blower fan rotates in a reverse direction to rapidly increase the temperature inside the drum rather than during a forward rotation to block hot air discharge and cold air from the drum.
The method of claim 12,

And the heater unit comprises a high capacity heater and a low capacity heater.
The method of claim 12,

And the dryer additionally displays a display unit displaying a process of processing a dry item in the drum.