KR100640819B1 - Clothes dryer having thermoelectric module-type condenser - Google Patents

Abstract

A cloth dryer with a thermoelectric module-type condenser is provided to reduce the volume of the heater and increase the drying efficiency by passing the outer air through the heating surface of the thermoelectric module and recycling some of the outer air. A cloth dryer with a thermoelectric module-type condenser is composed of a drum(11) where the laundry is inserted; a thermoelectric module-type condenser(13) for condensing the air discharged from the drum; a circulation duct(14) forming a circulation path of the air to flow the air discharged from the drum into the drum again; a heater(15) heating the circulation air; and a circulation fan(16) forcibly circulating the air through the circulation duct. The thermoelectric module-type condenser comprises a thermoelectric module for absorbing/heating the heat at the joint portion according to the directivity of the current flowing at the joint portion of two different metals. The air discharged from the drum passes through the endothermic surface of the thermoelectric module.

Description

Clothes Dryer with Thermoelectric Module Condenser {Clothes Dryer having thermoelectric module-type condenser}

1 is a side view showing the configuration of a condensation type clothes dryer according to a first embodiment of the present invention

Figure 2 is a plan view of the condensation type clothes dryer of Figure 1

Figure 3 is a plan view showing the configuration of a condensation type clothes dryer according to a second embodiment of the present invention

Figure 4 is a plan view showing the configuration of a condensation type clothes dryer according to a third embodiment of the present invention

5 is a perspective view showing a structural example of a condenser applied to each embodiment of the present invention;

Figure 6 is a cross-sectional reference for explaining a thermoelectric element applied to the present invention

7 and 8 are longitudinal cross-sectional views showing other embodiments of a thermoelectric modular condenser and a circulation duct connected thereto;

Explanation of Signs of Major Parts of Drawings

10: body 11: drum

13: Thermoelectric modular condenser 14: Circulation duct

15: heater 16: circulation fan

17: Motor 18, 18a: Air supply duct

18b: Outside duct 18c: Guide duct

19: Belt 21: cooling fan

23: pump

The present invention relates to a clothes dryer for drying a drying object such as clothing, and more particularly, to a condensation type clothes dryer of a new method in which a thermoelectric module is applied to a condenser of a condensation type clothes dryer that performs drying while circulating internal air. will be.

In general, a clothes dryer is a device that blows hot air generated by a heater into a drum to dry a drying object, and is largely an exhaust type clothes dryer and a condensation type according to a treatment method of wet air generated by drying a drying object. It is divided into a clothes dryer.

The exhaust type clothes dryer uses a method of discharging the wet air discharged from the drum to the outside of the dryer, and the condensation type clothes dryer removes moisture by condensing the wet air discharged from the drum in the condenser, and the dried air is removed from the drum. Send and recycle.

On the other hand, one of the things to consider recently when buying a home appliance is to add one more thing besides convenient functions, stylish design, and reasonable price. This is where the energy consumption efficiency class mark is looked. The energy consumption efficiency rating refers to the classification of energy-consuming home appliances into classes 1 to 5 according to energy consumption efficiency or energy consumption. A yellow sticker with a rating is attached to the product to help consumers more easily determine and purchase energy-saving products. The higher the grade, the greater the energy savings. First-class products can save 30-40% of energy compared to fifth-class products. The scheme also aims to ensure that manufacturers and importers of home appliances produce and sell energy-saving products from the outset.

By the way, the conventional condensation type clothes dryer has a low energy efficiency, there is a disadvantage that takes a long time to dry.

Therefore, in recent years, research is being actively conducted on a dryer having low energy using a heat pump, and products are appearing one after another.

However, a dryer using such a heat pump has a problem of cost burden and noise since a compressor must be used to construct a heat pump cycle, and structurally, the heat pump cycle occupies a large volume. There is a disadvantage that it becomes large, the product weight also becomes heavy.

In particular, the Waste Electrical and Electronic Equipment (WEEE) Directive, which entails producers to be responsible for the collection and disposal of all electrical and electronic products by 2005, will be implemented, resulting in high disposal costs and restrictions on the use of hazardous chemicals. Trade restrictions such as RoHS (short for Restriction of Hazardous Substances) have many problems, such as the need to use environmentally friendly refrigerants.

On the other hand, the conventional condensation type dryer has to be supplied with cooling water or cold air from the outside for condensation, the cooling water supply flow path or the external air supply flow path must be provided separately, which results in a complicated structure of the dryer have.

Therefore, there is an urgent need for the development of a new condensation type clothes dryer that can solve both the problem of using the heat pump and the problem of the conventional condensation type dryer.

The present invention has been made to solve the above problems, it is an object of the present invention to provide a condensation-type clothes dryer with a new condensation method is applied eco-friendly yet high drying efficiency and energy efficiency.

To this end, the present invention, the drum and the drying object is put; A thermoelectric module condenser condensing the air discharged from the drum; A circulation duct forming a circulation passage of air such that the air discharged from the drum flows back into the drum; A heater for heating the circulating air; Condensation type clothes dryer is provided, comprising a circulation fan for forced circulation of air through the circulation duct.

At this time, the thermoelectric module-type condenser is composed of a thermoelectric module that absorbs or generates heat at the junction according to the direction of the current flowing in the junction of the two different metals, so that the air discharged from the drum passes through the heat absorbing surface of the thermoelectric module Characterized in that it is installed.

The circulating air passing through the heat absorbing surface may be introduced into the drum through the heat radiating surface of the thermoelectric module.

On the other hand, the thermoelectric module-type condenser, the thermoelectric module may be a multi-layer structure, characterized in that it comprises at least a pair of endothermic surfaces facing each other spaced apart.

The circulating air passing through the space between the heat absorbing surfaces may flow into the drum after passing through the heat radiating surface of the thermoelectric module.

In addition, the heater is characterized in that the heating amount can be adjusted.

On the other hand, according to another aspect of the present invention for achieving the above object, a drum to which the drying object is put; A thermoelectric module condenser condensing the air discharged from the drum; A circulation duct forming a circulation passage of air such that the air discharged from the drum flows back into the drum; A heater for heating the circulating air; And a circulation fan configured to forcibly circulate air through the circulation duct, wherein the thermoelectric module condenser includes an external air supply duct for supplying external air to the heat generating surface of the thermoelectric module condenser, and the thermoelectric module condenser. Provided is a condensation type clothes dryer characterized in that an outdoor air discharge duct for discharging outside air passing through the heating surface is connected.

At this time, on the outside air supply duct or the outside air discharge duct may be installed a cooling fan for the suction and discharge of the outside air, and a variable speed motor for driving the cooling fan individually.

And, on the outside air discharge duct, a guide duct branching a part of the air discharged through the outside air discharge duct to the heater side can be connected.

In addition, the heater is characterized in that the heating amount can be adjusted.

Hereinafter, each embodiment of the condensation type clothes dryer according to the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show the structure of the condensation type clothes dryer according to the first embodiment of the present invention, Figure 5 is a perspective view showing an example of the structure of the condenser applied to the present invention, the arrow I in these figures The flow represents the flow, and arrow II represents the flow of circulating air.

And, Figure 6 is a reference diagram for explaining the thermoelectric module applied to the present invention.

As shown in Figure 1 and 2, the condensation type clothes dryer according to the first embodiment of the present invention, the drum 11, the drying object is accommodated in the main body 10 is installed in the front door 12 is Rotatably installed, the drum 11 is connected to the belt 19 by a motor 17 installed below the main body 10 so as to rotate.

At this time, the thermoelectric module type condenser 13 is installed below the main body 10 to condense the hot and humid air circulating through the drum 11 to make it dry.

In addition, the front part and the rear part of the thermoelectric module type condenser 13 are connected to the circulation duct 14 connected to the front and rear of the drum 11, respectively, so that the air discharged through the drum 11 is transferred to the thermoelectric module. The condenser 13 is allowed to flow back into the drum 11.

In addition, the circulation duct 14 is provided with a heater 15 for heating the air passing through the thermoelectric module condenser 13 and a circulation fan 16 for forcibly circulating the air through the circulation duct 14. In addition, the circulation fan 16 is configured to be connected to the other shaft of the motor 17 for driving the drum (11).

On the other hand, when condensing air circulated through the circulation duct 14 by heat exchange with the heat absorbing surface in the thermoelectric module type condenser 13, the heat generating surface of the thermoelectric module type condenser should be cooled. The external cold air to be supplied to the modular condenser 13, the outside air supply duct 18 is connected to one side of the thermoelectric modular condenser 13, the external air supply duct (18) On the opposite side of the thermoelectric module type condenser 13 to which the 18 is connected, a cooling fan 20 and a cooling fan driving motor 21 for forcibly drawing outside air through the outside air supply duct 18 and discharging it into the main body 10 are provided. Is installed.

Here, the cooling fan drive motor 21 is a variable speed motor capable of speed conversion, a BLDC motor (Brushless DC Motor) and the like can be used, the motor 17 for rotating the circulation fan 16 and the drum 11 Apart from this, only the cooling fan 20 is driven.

In addition, a lower portion of the thermoelectric module type condenser 13 collects the condensate generated during the condensation process and collects the condensed water dropped therein, and forcibly discharges the condensed water collected in the drip tray to the outside or is installed in the main body 10. A pump 23 for transporting to the condensate reservoir (not shown) is installed.

Reference numeral 22 is a lint filter that filters foreign substances such as seams from the air discharged to the circulation duct 14 through the front of the drum 11.

Here, the thermoelectric module-type condenser 13, as shown in Figure 5, the thermoelectric module-type condenser substrate 13a having a heat absorbing surface and the heat generating surface inside the condenser frame of the rectangular parallelepiped shape is spaced at a predetermined interval spaced a multi-layer structure In the front and rear direction of the condenser, circulating air for condensation is required to flow through the heat absorbing surface of the thermoelectric module-type condenser board 13a, and the heat generating surface of the thermoelectric module-type condenser board 13a in the left and right directions of the condenser. It is configured to flow cold outside air for cooling. That is, the circulation air flow path and the external air flow path of the thermoelectric module type condenser 13 are separated.

In this case, a heat sink (not shown) may be provided on the heat generating surface side of the thermoelectric module condenser substrate 13a.

Referring to the control process of the clothes dryer configured as described above are as follows.

When the user inputs a drying object in a wet state into the drum 11 and selects a drying mode to start operation, the cooling fan driving motor 21 is not operated and the motor 17 and the heater 15 are not operated. ) Is driven so that the circulation fan 16 and the drying drum 11 rotate.

Accordingly, air flows through the circulation duct 14. The air flowing through the circulation duct 14 is heated to a high temperature by the heater 15 and then flows into the drum 11.

Subsequently, when the set time X elapses or the circulating air flowing through the drum 11 and the circulation duct 14 rises to the target temperature T, the thermoelectric module condenser 13 and the cooling fan driving motor ( 21) will be turned on.

In this case, after drying the object to be dried in the drum 11, the air heated at high temperature and humidity is condensed by heat exchange while passing through the endothermic surfaces of the thermoelectric module type condenser 13, and then dried again, followed by a heater ( Heated by 15) and flows into the drum (11).

Then, when the cooling fan 20 starts to operate while the cooling fan drive motor 21 is operated, external air is heat-exchanged while passing through the heat generating surface of the thermoelectric module condenser 13 through the external air supply duct 18. After cooling the surface is discharged to the outside through one side of the body (10).

In this embodiment, when the cooling fan drive motor 21 is driven to drive the cooling fan 20, the time for circulating air circulating in the drum 11 to rise to a target temperature is predicted in advance by experiment or the like. Set the time (X) in the controller to control, or place a temperature sensor (not shown) in the drum 11 or in the circulation duct 14 to the point where the temperature of the circulating air becomes equal to or higher than the target temperature T. Can be set and controlled.

On the other hand, in the case of employing a heater 15 that can change the amount of heat generated in the clothes dryer, the speed of the cooling fan drive motor 21 is variable according to the amount of heat generated by the heater 15 can be dried operation at the optimum flow rate. have.

That is, when operating the heating value of the heater 15 to the set value (Q ₂ ) or more to operate the cooling fan drive motor 21 at a high speed to increase the flow rate so that drying can be done quickly, or When the heating value is set below the set value Q ₁ , the noise of the cooling fan drive motor 21 is reduced to low speed.

In the above-described embodiment, the cooling fan driving motor 21 is not fully operated until the circulating air reaches a predetermined target temperature at the beginning of operation. However, the motor 17 and the motor 17 are initially operated at the beginning of the operation of the clothes dryer. While simultaneously operating the cooling fan drive motor 21, the cooling fan drive motor 21 is driven at a very low speed to drive the cooling fan 20 at low speed, a certain time (X) has elapsed or the drum (11) And when the temperature of the circulating air circulating through the circulation duct 14 is higher than the target temperature (T) it may be a drying operation by operating the cooling fan 20 at a normal speed.

Of course, in this case, as in the above-described embodiment, the desired driving characteristics may be obtained by varying the speed of the cooling fan driving motor 21 according to the amount of heat generated by the heater 15, and thus, detailed description thereof will be omitted.

Meanwhile, a thermoelectric element applied to the thermoelectric module type condenser applied to the above-described embodiment and the following embodiments will be described with reference to FIG. 6.

The thermoelectric module type condenser 13 according to the present invention is modularized by connecting the thermoelectric elements in which the temperature difference between both ends is generated in parallel by using the difference in electromotive force to form a condensation substrate 13a, and induces a Peltier effect. Done.

6 is a cross-sectional view schematically illustrating a structure of a thermoelectric device constituting a thermoelectric module type condenser board of the thermoelectric module type condenser according to the present invention, wherein the thermoelectric element is mixed with N-type impurity ions. Thermoelectric elements 33 composed of semiconductors or semiconductors mixed with P-type impurity ions are disposed in parallel, and electrodes 31 and 34 made of copper plates are joined to upper and lower sides of the thermoelectric element 33, respectively. The ceramic substrate 32 is attached to surround the electrode.

In the thermoelectric element, when a current (DC) is applied to a junction, electrons in an N-type semiconductor move holes from an upper electrode to a lower electrode in a P-type semiconductor, and take heat from the upper part and emit it to the lower part. The Peltier effect occurs where the top is cooled and the bottom is heated.

In other words, the Peltier effect is one of the electric phenomena, and when a current flows through a connection between two different metals, heat generation or absorption occurs at the connection point.

Therefore, when a current is applied to the thermoelectric element, one side of the thermoelectric element forms a heat absorbing side having a low temperature, and the other side forms a heat generating side having a high temperature.If the current is applied in the opposite direction, the heat absorbing side and the heat generating side are Will change.

On the other hand, the thermoelectric module-type condenser substrate 13a is formed in a plate shape, more specifically in a square plate shape.

Hereinafter, a condensation type clothes dryer according to a second embodiment of the present invention will be described with reference to FIGS. 3 and 5.

3 is a plan view showing a condensation type clothes dryer according to a second embodiment of the present invention, and FIG. 5 is a thermoelectric module type condenser applied to the first embodiment and is applicable to this embodiment.

The condensation type clothes dryer according to the second embodiment of the present invention basically provides a condensation type clothes dryer of pure circulation type that does not require outside air to cool the heat generating surface of the thermoelectric module type condenser 13.

The circulating air flow path structure of the second embodiment can be easily seen through FIG. 3, and will be described based on FIG.

The condensation type clothes dryer according to the present embodiment includes: a drum 11 into which a drying object is inserted; A thermoelectric module condenser (13) for condensing the air discharged from the drum; A circulation duct 14 for forming a circulation passage of air such that the air discharged from the drum passes through the condenser and into the drum again; A heater 15 for heating the circulating air; It includes a circulation fan 16 forcibly circulating air through the circulation duct and connected to the motor 17 for driving.

At this time, the thermoelectric module-type condenser 13, the thermoelectric module-type condenser board 13a composed of thermoelectric elements (see Fig. 6) to absorb or generate heat at the junction in accordance with the direction of the current flowing in the junction between the two different metals. ) Is stacked structure, the air discharged from the drum passes through the heat absorbing surface and the heat generating surface of the thermoelectric module type condensation substrate (13a) sequentially.

That is, the thermoelectric module-type condenser 13, as shown in Figure 5, the thermoelectric module-type condenser substrate 13a having a heat absorbing surface and a heat generating surface inside the condenser frame 13b of the rectangular parallelepiped shape spaced apart at regular intervals As a multi-layer structure, the circulation air flows through the heat absorbing surface of the thermoelectric module-type condensation substrate 13a in the front-rear direction as in the first embodiment, but the heat absorbing surface of the thermoelectric module-type condensing substrate 13a is The difference is that the circulating air from which moisture is removed passes through the heating surface again and then flows toward the heater 15.

To this end, the circulation duct 14 is a portion 14a connecting the drum front side and the thermoelectric module condenser so that the circulating air discharged from the drum passes through the heat absorbing surface of the thermoelectric module condenser, and the thermoelectric module type. A portion 14b connecting the one side (condensing passage exit side) and the other side (cooling passage inlet side) of the condenser so that the circulating air passing through the endothermic surface of the condenser passes the heat generating surface of the thermoelectric module type condenser again. And a portion 14c for connecting the other side of the thermoelectric module condenser and the rear side of the drum.

On the other hand, the lower portion of the thermoelectric module type condenser 13 is a drip tray (not shown) which is generated during the condensation process and collects the condensate dropped, and forcibly discharge the condensate collected in the drip tray to the outside or installed in the main body (10) A pump 23 for transporting to a condensate reservoir (not shown) is installed, and reference numeral 22 denotes a lint for filtering foreign substances such as seams from the air discharged to the circulation duct 14 through the front of the drum 11. The filter is the same as in the above embodiment.

Referring to the control process of the clothes dryer according to the present embodiment configured as described above are as follows.

When the user inputs a drying object in a wet state into the drum 11 and selects a drying mode to start operation, the cooling fan driving motor 21 is not operated and the motor 17 and the heater 15 are not operated. ) Is driven so that the circulation fan 16 and the drying drum 11 rotate.

Accordingly, air flows through the circulation duct 14, and the air flowing through the circulation duct 14 is heated to a high temperature by the heater 15 and then flows into the drum 11.

Subsequently, when the set time X has elapsed or the circulating air flowing through the drum 11 and the circulation duct 14 rises to the target temperature T, a thermoelectric module condenser may be used to remove moisture in the circulation air. 13) will be turned on.

In this case, as the drying object is dried inside the drum 11, the air heated at high temperature and humidity is condensed by heat exchange while passing through an endothermic surface of the thermoelectric module type condenser 13, thereby becoming a dry state.

In addition, the circulating air discharged through the endothermic surface of the thermoelectric module condenser 13 is changed in direction through the circulation duct 14a and is introduced between the condenser substrate 13a of the thermoelectric module type condenser and the condenser substrate 13a. After passing through the heating surface between the (), flows to the heater 15 side again flows into the drum 11 in the state heated by the heater (15).

In this embodiment, when the thermoelectric module type condenser 13 is turned on, the time X is input to the controller by predicting, in advance, a time when the circulating air circulating in the drum 11 rises to a target temperature. By setting or controlling, or by placing a temperature sensor in the drum 11 or the circulation duct 14 or the like, it can be set and controlled at a point in time where the temperature of the circulating air becomes equal to or higher than the target temperature T.

Meanwhile, in the second embodiment, the air passing through the heat absorbing surface of the thermoelectric module condenser 13 and the air passing through the heat generating surface are substantially orthogonal to each other, but are not necessarily limited thereto.

That is, as shown in Figures 7 and 8, by designing the shape of the circulation duct (20, 21) to change the flow direction of the circulating air 180 degrees, the condensed air temperature is reduced after the condensation thermoelectric module type condensation Instead of cooling the heat-generating surface of the substrate 13a, it is also possible to structure itself to be preheated.

In addition, although the specific form is not illustrated here in FIGS. 7 and 8, the heat absorbing surface of the thermoelectric module type condenser board 13a is inclined to one side, and the collected condensate is circulated through a drain hose not shown. Of course, it is possible to discharge the condensed water to the outside 20) (21).

On the other hand, as described above, in order to provide a structure in which the circulation air having a lower temperature after condensation by changing the flow of the circulation air by 180 degrees is cooled instead of cooling the heat generating surface of the thermoelectric module condensation substrate 13a, the thermoelectric The thermoelectric module should be designed so that the circulating air temperature is lower than the temperature of the heat generating surface while passing through the endothermic surface of the modular condenser (13a) .The thermoelectric module has fast cooling speed and accurate temperature control, and local cooling and omnidirectional operation This is possible, and the endothermic heat can be changed according to the direction of the current, so that the design can be made to meet the desired characteristics.

On the other hand, the thermoelectric module is noiseless, vibration-free, because there is no mechanical operation sound, it is of course environmentally friendly, since it does not use a refrigerant, there is an advantage that can be miniaturized.

As described above, the conventional condensation type dryer has to be supplied with cooling water or cold air from the outside for condensation, and thus a cooling water supply passage or an external air supply passage should be separately provided, resulting in a complicated structure of the dryer. Although there is a disadvantage, the condensation type clothes dryer according to the second embodiment of the present invention can eliminate these disadvantages.

Hereinafter, a condensation type clothes dryer according to a third embodiment of the present invention will be described with reference to FIG. 4.

The basic configuration of the condensation type clothes dryer according to the present embodiment is the same as that of the condensation type clothes dryer of the first embodiment, except that the air is discharged to the outside after being used to cool the heat generating surface of the thermoelectric module condensation substrate 13a. Since there is a feature in that a configuration for recycling a part is added, a description of the same components as in the first embodiment will be omitted, and the description will be mainly focused on the parts constituting the feature.

As shown in FIG. 4, the condensation type clothes dryer according to the present embodiment is a guide duct 18c for allowing a part of the air discharged through the outdoor air discharge duct 18b to join the circulating air introduced into the heater 15. There is a structural feature in that it is provided.

Accordingly, in the condensation type clothes dryer of the present embodiment, the cold outside air supplied to the thermoelectric module type condenser 13 through the outside air supply duct 18a cools the heat generating surface by passing through the heat generating surface of the condenser. The condensation efficiency on the endothermic surface becomes high.

In addition, the outside air heated by cooling the heat generating surface is discharged through the outside air discharge duct 18b, and some of them are introduced into the heater 15 through the guide duct 18c to reduce the load of the heater.

In particular, since the outdoor air has a relatively low relative humidity compared to the circulating air, when it flows into the heater 15 in the heated state, it reduces the load of the heater and increases the drying efficiency by lowering the relative humidity of the circulating air. Will also serve.

As described above, the present invention is possible to provide a condensation type clothes dryer that can be environmentally friendly and have a high energy efficiency, the present invention is not limited to the above embodiments, without departing from the scope of the technical spirit of the present invention Of course, it is possible to change, change or modify in many different forms.

As described above, according to each embodiment of the present invention, it is possible to provide a condensation type clothes dryer to which a new condensation method is applied while being high in drying efficiency and energy efficiency.

In particular, according to the first embodiment of the present invention, it is possible to provide an eco-friendly and energy-efficient clothes dryer as described above by employing without many changes of the existing condensation type clothes dryer structure.

And, according to the second embodiment of the present invention, there is no supply and discharge of the outside air, it is possible to omit the cooling fan and the duct according to the supply and discharge of the outside air, while providing an environment-friendly and highly efficient clothes dryer as described above It becomes possible.

In addition, according to the third embodiment of the present invention, the drying efficiency may be improved while reducing the capacity of the heater by recycling a part of the outside air heated while passing through the heat generating surface of the thermoelectric module, as described above. It is possible to provide this high clothes dryer.

Claims (8)

A drum into which a drying object is put; A thermoelectric module condenser condensing the air discharged from the drum; A circulation duct forming a circulation passage of air such that the air discharged from the drum flows back into the drum; A heater for heating the circulating air; Condensation type clothes dryer characterized in that it comprises a circulation fan for forced circulation of air through the circulation duct. The method of claim 1, The thermoelectric module condenser, It consists of a thermoelectric module that absorbs or generates heat at the junction according to the direction of the current flowing in the junction of two different metals, Condensation type clothes dryer, characterized in that the air discharged from the drum is installed to pass through the heat absorbing surface of the thermoelectric module. The method of claim 2, The circulation air passing through the heat absorbing surface, the condensation type clothes dryer, characterized in that the flow through the heat dissipation surface of the thermoelectric module to the drum. The method of claim 1, The thermoelectric module condenser, Thermoelectric module is a multilayer structure, Condensed clothes dryer, characterized in that it comprises at least a pair of endothermic side facing each other spaced apart. The method of claim 4, wherein Circulating air passing through the space between the heat absorbing surface, the condensation type clothes dryer, characterized in that to be introduced into the drum after passing the heat radiation surface of the thermoelectric module. The method of claim 2, The thermoelectric module condenser, An outside air supply duct for supplying outside air to the heat generating surface of the thermoelectric module condenser; The outside air discharge duct for discharging the outside air passing through the heat generating surface of the thermoelectric module condenser is connected, On the outside air supply duct or the outside air discharge duct, a cooling fan to allow the suction and discharge of the outside air, and a variable speed motor for driving the cooling fan separately, characterized in that the clothes dryer. The method of claim 6, On the outside air discharge duct, Condensation type clothes dryer, characterized in that the guide duct is branched to send a portion of the air discharged through the air discharge duct to the heater side. The method according to any one of claims 1 to 7, The heater is a condensation type clothes dryer, characterized in that the heating value is adjustable.

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