KR20040090051A - An an apparatus and method for drying a laundry using vacuum hot wind drying - Google Patents

Abstract

PURPOSE: A laundry drying machine of a vacuum hot blast type and a control method thereof are provided to improve the drying efficiency by changing a drying chamber into a vacuum or high-temperature and high-pressure state to reduce the time for drying the laundry. CONSTITUTION: In a laundry drying machine of a vacuum hot blast type, a drying chamber(11) closed from the outside is formed to the inside of a body part(10) having an opening and shutting door to the front, and a drying unit(40) for hanging and drying the laundry is installed in the drying chamber. The laundry drying machine comprises a rotating unit(50) rotating the drying unit at predetermined speed; a hot blast unit(20) for heating air by a heating unit at the lower part of the drying unit and blowing hot blast into the drying chamber by a blower fan; a temperature sensor for sensing the temperature of the drying chamber; a humidity sensor for sensing the humidity of the drying chamber; a pressure sensor for sensing the pressure of the drying chamber; an air exhaust unit(30) for exhausting the air of the drying chamber to control the vacuum pressure; an operation panel to which various keys and working state display units for enabling a user to operate the working of the drying machine are installed; a door-sensing part for sensing the door opening of the drying chamber; and a control part for executing drying by rotating the drying unit while producing hot blast after exhausting the air of the drying air under predetermined pressure while controlling the working of each part and for automatically executing drying control on the basis of the pressure, humidity, and temperature by set drying modes.

Description

{An an apparatus and method for drying a laundry using vacuum hot wind drying}

The present invention relates to a laundry dryer, and more particularly, to seal the drying chamber into which the laundry is put into the outside, and to discharge the air of the drying chamber to the outside to make it in a vacuum state, by applying high temperature heat in this state to a high temperature and a high pressure state. The present invention relates to a vacuum hot air type control apparatus for a laundry dryer and a control method thereof to shorten a drying time of a laundry.

In general, in order to wash and dry laundry such as clothes, there is a method of drying with natural light on a veranda or drying rack, or drying after washing with a washing machine having a drying function, or drying with a separate dryer after washing with a washing machine. .

Drying method using natural light of the above method has the advantage that does not need the energy required to dry the laundry, but the weather is a lot, even if the weather is good even nowadays, due to air pollutants such as smoke and dust There is a problem that is difficult to do.

In addition, in the case of drying laundry indoors, it takes a lot of drying time because it does not receive direct sunlight, and in particular, when the laundry is dried indoors during the rainy season or on a cloudy day, mold due to excessive moisture may occur. .

In addition, if the laundry is dried using a washing machine which is dried at the same time as washing in the above method, excessive power consumption (2000 to 3200 wh) is required, which imposes a burden on the home allowable power and drying is only 40 to 50% of the washing capacity. There is a problem in that it can not be processed to burden the user with excessive electricity bills, and takes a long time until drying after washing.

In addition, a method of drying in a separate dryer after washing is also known in the above method, but conventional laundry dryers simply discharge hot air to laundry to dry only at a high temperature, resulting in poor drying performance and a long drying time. There is a problem.

The present invention has been made to solve such a conventional problem, the object of which is to control the vacuum hot air method of the laundry dryer to improve the drying efficiency by changing the drying chamber to a vacuum or high temperature, high pressure to shorten the drying time of the laundry In providing a device.

The present invention is to provide a method of controlling a laundry dryer of a vacuum hot air type by controlling the drying in an automatic manner by detecting the pressure and temperature by the sensor at the time of hot air drying.

In addition, the present invention experimentally obtain the hot air heating time, the exhaust time and the total time in advance according to the characteristics of each garment to set the drying mode and to perform automatic control according to the drying mode to automatically dry according to the characteristics of the clothing It is to provide a control method.

1 is a perspective view showing a laundry dryer according to the present invention.

2 is a cross-sectional view of the laundry dryer according to the present invention.

3 is a cross-sectional view taken along the line AA of FIG.

Figure 4 is a block diagram of a control device of a laundry dryer of a vacuum hot air method according to the present invention.

5 is a flowchart illustrating a control method of a laundry dryer of a vacuum hot air method according to the present invention.

(Explanation of symbols for the main parts of the drawing)

10: main body 11: drying chamber

12: opening and closing door 13: cover

13a: support 14: drip tray

20: hot air means 30: air discharge means

40: drying means 41: drying rod

41a: Euro 41b: Through hole

42: engaging piece 43: hanger rod

44: support bar 50: rotation means

51: rotation shaft 52: drive motor

53: drive shaft 101; Control

102: temperature sensor 103: pressure sensor

104: humidity sensor 105: door detection unit

107: operation panel 108: storage unit

The laundry dryer of the vacuum hot air method of the present invention for achieving the above object,

In the laundry dryer provided with a drying means for drying the laundry by hanging the laundry in the interior of the main body portion is provided with an opening and closing door in the front, the drying chamber,

Rotating means for rotating the drying means provided in the drying chamber at a predetermined speed, Hot air means for blowing hot air into the drying chamber with a blower fan by heating air from the lower part of the drying means by a heating means, and the temperature of the drying chamber. Temperature sensor for detecting the temperature, Humidity sensor for detecting the humidity of the drying chamber, Pressure sensor for detecting the pressure of the drying chamber, Air discharge means for adjusting the vacuum pressure by exhausting the air of the drying chamber to the outside And a control panel provided with various keys and operation status indicators for the user to operate the operation of the dryer, a door detecting unit for detecting the door opening of the drying chamber, and a drying chamber at a predetermined pressure while controlling the operation of the respective units. After the air is exhausted, drying is performed by rotating the drying means while generating hot air, for each set drying mode. It characterized in that it comprises a control unit for automatically performing the drying control based on pressure, humidity and temperature.

Here, the hot wind means is a hot wind generating means consisting of a heating means (for example, a heater or a heat sink) and a blowing fan, or any of the magnetron heating means (for example, a magnetron of a microwave oven) for generating moisture by generating microwaves by the magnetron. It can be configured as one.

In addition, the laundry dryer control method of the vacuum hot air method of the present invention,

In the control method of the dryer is provided with a drying chamber sealed to the outside by the door closed in the main body portion to blow hot air in the drying chamber to dry the laundry,

A first step of exhausting the air in the drying chamber to a predetermined pressure or less through the air discharge means in the door closed state when the drying mode is started; A second step of stopping the exhaust and operating hot air means to blow hot air into the drying chamber when the pressure in the drying chamber reaches a predetermined pressure; A third step of controlling the motor while performing the second step to rotate the drying means in the drying chamber at a constant speed; While performing the second step, by checking the drying chamber temperature and pressure to control the hot air means not to exceed the upper limit threshold temperature experimentally obtained in advance, if the pressure rises above a certain value by forcibly venting the air to be below a predetermined pressure A fourth step of proceeding to the drying mode by hot air heating again; When the humidity in the drying room to obtain the drying completion humidity obtained in advance by the experiment characterized in that it is made to perform the fifth step of controlling the hot air means and the air discharge means to terminate the drying and display it.

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

1 to 3 is a view showing a laundry dryer according to the present invention.

As shown in the figure, the laundry dryer is composed of a main body 10, a hot air means 20, an air discharge means 30, a drying means 40, a rotation means 50, and a control device.

The main body 10 has a drying chamber 11 sealed to the outside and an opening and closing door 12 is provided on the front.

In addition, the main body 10 is a square frame in the form of a strut on the corner, and the strut and strut between the inner plate, the outer plate coupled to have a constant curved surface, and foamed urethane and the like between the inner and outer plates It was made to insulate the outside.

In addition, the cover 13 is coupled to the upper surface of the main body portion 10, the support 13a is supported at one end of the drying means 40 to be described later is formed in the center of the lower end of the cover (13).

In addition, the opening and closing door 12 of the main body portion 10 is made of a transparent window so that the inside is visible, and to slide between the inner, outer plate of the main body portion 10, and to the inside for the sealing of the drying chamber (11) It is desirable to install the packing.

In addition, the bottom surface of the drying chamber 11 has a predetermined inclination to facilitate the discharge of condensed water dropped from the laundry, and is installed to the bottom of the drip tray 14 to collect the condensed water to remove the condensed water after drying.

The hot air means 20 is installed below the main body 10 to blow a high temperature to the drying chamber 11 is coupled to a heat sink and a blowing fan.

The heat sink is generally made of a positive temperature coefficient (PTC) element.

The PTC device is a semiconductor device and has a characteristic that the resistance value increases rapidly with respect to a temperature rise when a specific temperature is reached. A representative feature is that the resistance value reacts according to the ambient temperature so that the heat generation amount is high and the room temperature is increased. When the heat rises again, the heating value of the economical and efficient sensor-type heating element is low, there is a low risk of fire.

The hot air means 20 is a hot air means composed of a heating means (for example, a heater or a heat sink) and a blower fan as described above, or a magnetron for generating moisture by generating microwaves by using a high frequency generator of a microwave oven, that is, a magnetron. The magnetron device is a magnetron oscillated by a high voltage supplied by a high-voltage transformer to generate microwaves and heats moisture by the microwaves. In the following description, a hot air heating method using a heat sink and a blower fan is described as an embodiment.

The air discharge means 30 is installed below the main body 10 and discharges the internal air of the drying chamber 11 to the outside during the initial and drying process.

In addition, the air discharge means 30, it is preferable to use an air discharger, such as a well-known vacuum pump, a detailed description is omitted because it is a known technique.

The drying means 40 is installed in the drying chamber 11 of the main body 10 so as to take the laundry. The drying means 40 is installed in the center of the drying chamber 11 in the lengthwise direction and supplied from the hot air means 20. A drying rod 41 in which a flow path 41a is formed at the center to discharge the heat to the drying chamber 11 and a plurality of through-holes 41b are formed to communicate the flow path 41a and the drying chamber 11; And a coupling piece 42 sliding up and down the drying rod 41, a plurality of hook rods 43 radially installed on an outer circumferential surface of the coupling piece 42, and fixing the coupling piece 42 from below. It is comprised by the support bar 44 to make.

That is, by rotating the drying rod 41 is to hang the laundry on the hanger rod 42 installed radially.

The rotating means 50 is to support the lower side of the drying means 40 and to rotate it, and is connected to the rotating shaft 51 formed with a belt pulley on the outer circumferential surface, and the rotating shaft 51 by a belt, It consists of the drive shaft 53 rotated by the drive motor 52. As shown in FIG.

That is, by screwing the lower end of the drying rod 41 and the rotary shaft 51, and by rotating it by the drive motor 52 to dry the laundry caught on the hook rod 42, the internal air vortex While improving the drying efficiency.

4 is a block diagram of a control device for a laundry dryer according to the present invention.

In the interior of the main body 10 provided with the opening and closing door 13 on the front is formed a drying chamber 11 is sealed to the outside, the laundry dryer provided with a drying means 40 for drying the laundry in the drying chamber (11) In the drying chamber 11, the drying means 40 installed in the drying chamber 11 at a predetermined speed, and the air in the lower portion of the drying means 40 by heating means to heat the drying chamber with a blowing fan Hot air means 20 for blowing hot air therein, a temperature sensor 102 for detecting the temperature of the drying chamber, a humidity sensor 103 for detecting the humidity of the drying chamber, and a pressure of the drying chamber A pressure sensor 104 for controlling the air, an air discharge means 30 for controlling the vacuum pressure by evacuating the air in the drying chamber, and various keys and operation state indicators for the user to operate the dryer. Panel (1 06), the door detection unit 105 for detecting the door opening of the drying chamber and the drying means by rotating the drying means while generating hot air after exhausting the drying chamber air at a predetermined pressure while controlling the operation of the respective parts. The upper and lower temperature threshold values, the upper and lower pressure threshold values of the drying operation mode of the control unit 101 and the control unit 101 which automatically perform drying control based on the set pressure, humidity and temperature for each drying mode. It is configured to include a storage unit 107 for storing data such as the humidity threshold value for each mode.

The present invention configured as described above is to perform the automatic drying in a control method as shown in FIG.

The user hangs the laundry on the drying means 40, opens the door 13, mounts the drying means 40 inside the drying chamber 11, and closes the door to seal the drying chamber 11 with the outside.

Subsequently, when the operation start mode is operated through the operation panel 106, the control unit 101 performs automatic drying in the manner as shown in FIG.

When the drying mode is started, a first step S101 of exhausting the air in the drying chamber to a predetermined pressure or lower (lower threshold pressure) through the air discharge means in the door closed state is performed. In the first step S101, the air discharge unit 30 is operated only when the control unit 101 first closes the door through the door detection unit 105, and the pressure inside the drying chamber 11 is controlled through the pressure sensor 103. It detects and forcibly evacuates air so that it may become below predetermined preset pressure. This is forcibly exhausted to a semi-vacuum state by using the vacuum pump of the air discharge means (30).

Thereafter, when the pressure of the drying chamber 11 reaches a predetermined pressure, a second step (S102) of stopping the exhaust and operating the hot air means 20 to blow hot air into the drying chamber 11 is performed. The third step of rotating the drying means 40 in the drying chamber at a constant speed is performed by controlling the motor of the rotating means 50 while performing the step 102.

The hot air means 200 includes a heat sink 21 and a blowing fan 22 which are heating means, and the control unit 101 operates the heating means and the blowing fan.

In this way, during the drying mode, the temperature and pressure of the drying chamber are checked to control the hot air means so as not to exceed the previously obtained upper limit threshold temperature. After performing the step 4 again to operate the hot air means to perform the drying mode.

This is to perform the drying chamber temperature / pressure check step (S103) for detecting the temperature and pressure of the drying chamber through the temperature sensor 102 and the pressure sensor 103, respectively, and whether the detected temperature is an upper limit temperature determined experimentally. When the temperature is less than the upper limit threshold temperature, the temperature comparison step (S104) of checking the temperature and pressure while continuing to blow hot air is performed.

If the drying chamber temperature rises above a predetermined upper limit threshold temperature, the step S105 of stopping heating of the hot air means and continuing blowing is performed, and comparing the detected pressures in this state (S106). Perform.

The drying chamber pressure is increased by blowing hot air into the drying chamber as described above, and when the detection pressure of the drying chamber is lower than a predetermined upper limit threshold pressure, the drying chamber returns to the temperature / pressure checking step and performs a drying mode. If the detection pressure is higher than the upper limit threshold pressure, the controller 101 controls the air discharge means 30 to forcibly exhaust the air in the drying chamber 11 to the outside to lower the pressure.

As described above, the hot air is blown and heated to automatically control the temperature not to rise above the upper limit threshold temperature, and when the pressure is detected to be higher than the upper limit threshold pressure, the exhaust air is forced out to discharge moisture. If only the temperature is high, there is a risk that the laundry may be damaged, and even if the pressure is too high or too low, problems may occur in the laundry and the stability of the dryer. Therefore, experimentally obtaining and storing the temperature and pressure threshold in the storage unit 107 in consideration of this. Automatic control.

The pressure comparison increases the pressure by operating the hot air means until the pressure in the drying chamber is higher than a predetermined upper limit threshold pressure. If the pressure is higher than the critical pressure, the step of operating the air discharge means 30 to discharge the air (S107). As the pressure in the drying chamber is lowered by the air discharge, moisture is exhausted to the outside.

Subsequently, detecting the pressure of the drying chamber and performing a step (S108) to compare with a predetermined lower limit threshold pressure (which is equal to a predetermined pressure at the start of the initial operation or the pressure can be dried well by experiment). And, the air discharge is continued until it is lower than the lower limit threshold pressure, and when it is lower than the lower limit threshold pressure, the step of stopping the air discharge is performed (S109).

After the drying mode is performed as described above, when the humidity in the drying room reaches the drying completion humidity previously obtained by experiment, the fifth step of controlling the hot air means and the air discharge means to finish drying and displaying the same is shown. Perform.

The fifth step is to perform the step (S110) of comparing the detected humidity of the drying chamber and the predetermined critical humidity, and if the humidity of the drying chamber is higher than the critical humidity, the step of operating the hot air means to see that the drying is not yet completed The process returns to the drying chamber temperature check step S103 and performs a drying mode.

If the humidity of the drying chamber is lower than the critical humidity, the hot air means 20, the rotating means 50 is stopped, and the air inflow operation (S112) to end the drying mode (S113).

On the other hand, the present invention has been described an embodiment to perform the automatic drying mode by the pressure and humidity, but is not limited to this, decompression by the exhaust, depressurization by the exhaust after the hot air heating for a predetermined time to repeat the drying time It is possible to provide a control method to control automatic drying.

The laundry dryer according to the present invention as described in detail above seals the drying chamber into which the laundry is put into the outside, and discharges the air of the drying chamber to the outside to make a vacuum state, and in this state, high temperature heat is applied to make the high temperature and high pressure state. Therefore, drying time and drying efficiency are improved.

Claims (5)

In the laundry dryer provided with a drying means for drying the laundry by hanging the laundry in the interior of the main body portion is provided with an opening and closing door in the front, the drying chamber, Rotating means for rotating the drying means installed in the drying chamber at a predetermined speed; Hot air means for heating the air in the lower portion of the drying means by a heating means to blow hot air into the drying chamber with a blowing fan; A temperature sensor for sensing a temperature of the drying chamber, Humidity sensor for detecting the humidity of the drying chamber, A pressure sensor for sensing the pressure of the drying chamber; Air discharge means for controlling the vacuum pressure by exhausting the air of the drying chamber to the outside, The operation panel equipped with various keys and operation status indicators for the user to operate the dryer A door detection unit for detecting a door opening of the drying chamber; While controlling the operation of each part, the drying chamber is initially exhausted at a predetermined pressure and then hot air is generated to rotate the drying means while drying, and the drying control is automatically performed based on the set pressure, humidity and temperature for each drying mode. Laundry dryer of a vacuum hot air method, characterized in that it comprises a control unit to. The method of claim 1, wherein the hot air means, A laundry machine of a vacuum hot air type, characterized in that it is a magnetron device that generates microwaves and heats moisture in a drying chamber. In the control method of the dryer is provided with a drying chamber sealed to the outside by the door closed in the main body portion to blow hot air in the drying chamber to dry the laundry, A first step of exhausting the air in the drying chamber to a predetermined pressure or less through the air discharge means in the door closed state when the drying mode is started; A second step of stopping the exhaust and operating hot air means to blow hot air into the drying chamber when the pressure in the drying chamber reaches a predetermined pressure; A third step of controlling the motor while performing the second step to rotate the drying means in the drying chamber at a constant speed; While performing the second step, by checking the drying chamber temperature and pressure to control the hot air means not to exceed the upper limit threshold temperature experimentally obtained in advance, if the pressure rises above a certain value by forcibly venting the air to be below a predetermined pressure A fourth step of proceeding to the drying mode by hot air heating again; When the humidity in the drying room to obtain the drying completion humidity obtained in advance by the experiment to control the hot air means and the air discharge means to perform the fifth step of terminating drying and displaying this Method of controlling a laundry dryer of the type. The method of claim 3, wherein the fourth step, Comparing whether or not the drying chamber temperature is the upper limit threshold temperature determined experimentally in advance, the temperature comparison step (S104) for checking the temperature and pressure while continuing to blow hot air, and When the drying chamber temperature rises above the predetermined upper limit threshold temperature, the heating of the hot air means is stopped and only blowing is continued (S105); Comparing the detection pressure of the drying chamber with a predetermined upper limit threshold pressure (S106); If the detection pressure of the drying chamber is lower than the predetermined upper limit threshold pressure, the process returns to the drying chamber temperature / pressure checking step and performs the drying mode. When the detection pressure becomes higher than the upper limit threshold pressure, the air in the drying chamber is forced out of the outside. Reducing the pressure (S107), Comparing the drying chamber pressure to be equal to or less than a predetermined lower pressure (S108); And a humidity comparison step (S109) of performing a drying mode from the second step if the detection humidity of the drying chamber is higher than the threshold humidity compared to a predetermined threshold humidity. In the drying control method of a laundry dryer provided with a drying means for drying the laundry by hanging the laundry in the interior of the main body portion is provided with an opening door in the front, the drying chamber, Forcibly evacuating the air in the drying chamber to lower the pressure below the predetermined pressure; Applying hot air for a predetermined time in the drying chamber to perform hot air heating to be below a predetermined pressure; Forcibly evacuating the air in the drying chamber to be below a predetermined pressure when the hot wind heating time becomes longer than a predetermined time; The method of controlling a laundry dryer of a vacuum hot air type, characterized in that to perform a step of repeating the hot air heating step and the exhausting step a predetermined number of times to end a drying mode.