KR100724444B1 - Drum type clothes dryer and control method thereof - Google Patents

Abstract

The present invention relates to a drum type clothes dryer, comprising: a cabinet; A drum accommodating clothes therein and rotatably formed in the cabinet; Including a heating unit installed in the cabinet to heat the drum, by heating the drum itself by the heating unit, even if the dry material does not directly contact the hot air flow path can be uniformly dried by receiving heat from the heated drum The present invention provides a drum type clothes dryer having faster drying speed and higher drying efficiency.

Drum heating, radiant heat transfer

Description

Drum type clothes dryer and control method {DRUM TYPE CLOTHES DRYER AND CONTROL METHOD THEREOF}

1 is a cross-sectional view showing a conventional clothes dryer.

Figure 2 is a partially cut perspective view showing the configuration of a drum-type clothes dryer according to an embodiment of the present invention.

3 is a schematic view for explaining the principle of operation of FIG.

Figure 4 is a side cross-sectional view showing the configuration of a drum type clothes dryer according to another embodiment of the present invention.

*** Explanation of symbols for the main parts of the drawing ***

110: cabinet 116: drum

120: first air flow path 122: second air flow path

130: first heat exchanger 132: second heat exchanger

134: compressor 136: expansion means

150: reflecting plate 160: heating unit (heating wire)

The present invention relates to a drum-type clothes dryer, and more particularly, to a drum-type clothes dryer that not only uniformly dries the clothes inside the dryer, but also enables rapid drying and reduces energy consumption required for drying clothes.

Clothes dryers generally have a drum rotating therein, and dry the article with hot air. The clothes dryer may be classified into an exhaust method and a condensation method according to the treatment method of the wet air generated while drying the dry items. The former is a method of discharging the humid air discharged from the dryer to the outside, the latter is a method of condensing the wet air discharged from the dryer to remove the moisture and circulating the moisture-removed air back to the dryer.

Figure 1 shows a cross-sectional structure of a conventional clothes dryer of the exhaust system. As shown, the clothes dryer forms an exterior and has a cabinet 10 having a front door 11 formed therein, a drum 12 rotatably installed in the cabinet 10, and an inside of the drum 12. A hot air guide duct 13 for guiding the hot air, a hot air discharge duct 14 for discharging hot air that has passed through the interior of the drum 12, and a blowing fan 15 for sucking and discharging external air; .

An opening 16 for introducing or removing laundry into the drum 12 is formed on the front surface of the cabinet 10 in which the door 11 is mounted. The drum 12 is rotated at a low speed by the motor 17 provided at the bottom of the cabinet 10. The motor 17 is provided to drive the drum 12 and the blowing fan 15 at the same time. To this end, the drive shaft 18 of the motor 17 extends to both sides of the motor 17, and the drive shaft 18 is provided. One end of is connected to the blowing fan 15, the other end is connected to the pulley 19 for rotating the drum (12). The pulley 19 is connected to a belt 20 installed to surround the drum 12.

Hot air discharge duct 14 is disposed between the lower portion of the front of the drum 12 and the blowing fan 15, one end of the filter 21 is installed, such as lint or the like contained in the hot air passing through the drum 12 It will filter foreign matter. The outlet of the blower fan 15 is made of a cylindrical pipe, the exhaust duct 22 of which the open end extends out of the cabinet 10 is coupled. An opening / closing valve 23 is provided at the open end of the exhaust duct 22. When the blower fan 15 is operated, the exhaust duct 22 is opened by hot air. When the blower fan 15 is not operated, the exhaust duct 22 is exhausted. Closing the duct 22 prevents foreign matter from flowing in from the outside.

The coil heater 30 is installed at the upper portion of the hot air guide duct 13, and as the blowing fan 15 and the drum 12 rotate by the driving of the motor 17, the outside air passes through the heater 30. The heating is introduced into the drum 12 through the hot air guide duct 13. Therefore, the wet laundry introduced into the drum 12 is dried by the hot air, while the hot air passing through the drum 12 is discharged to the outside through the hot air discharge duct 14 and the exhaust duct 22.

In general, an exhaust type dryer has an intake duct and an exhaust duct connected to a rotatable drum provided inside a cabinet, and a heater is installed in the intake duct.

As the air outside the dryer is introduced into the intake duct by the driving of the fan, it is heated to a high temperature by a heater, where the heating temperature reaches about 100 ° C. This hot air flows into the drum inside the dryer to dry the dry matter inside the drum. In the drying process, the hot air contains moisture contained in the object to be dried, and high humidity air is discharged to the outside through the exhaust duct.

The conventional clothes dryer which transfers heat to the inlet air by using the heater can shorten the overall drying time by the rapid air heating of the heater, and can be manufactured in a large capacity, while the inlet air is heated by the heater. Therefore, there is a disadvantage that the energy consumption is large. In particular, since the dry items are dried with hot air at 100 ° C. or higher, there is a high possibility that damage may occur in the drying process depending on the material of the dry items. There is also a problem that is dried and the overall drying efficiency is lowered.

On the other hand, condensation type clothes dryers have the advantage of being able to be manufactured in a built-in type because they do not require an exhaust duct to release air to the outside of the clothes dryers, and energy efficiency is higher than that of the exhaust type, but drying time is long. There is a disadvantage that it is difficult to manufacture a long and large capacity.

Under such a background, there is a need for an improved clothes dryer with high energy efficiency and no damage to the dry matter.

The present invention has been made to solve the problems of the prior art as described above, an object of the present invention is to provide an improved clothes dryer, so that the damage does not damage the dry items.

Another object of the present invention is to not only dry the clothes inside the dryer uniformly, but also to dry quickly, and to reduce the energy consumption required for drying clothes.

The present invention, in order to achieve the object as described above, the cabinet; A drum accommodating clothes therein and rotatably formed in the cabinet; A heating unit installed in the cabinet to heat the drum; It provides a drum-type clothes dryer, characterized in that configured to include.

As a result, the heating unit heats the drum itself, so that heat generated from the heating unit is transferred to the outer surface of the drum, and this heat causes the clothes to be dried to be heated through the inside of the drum by conduction so that the temperature of the entire fabric is uniform. Rise to promote evaporation of moisture inside the building. In this way, by quickly discharging moisture from the dry matter and discharging the discharged moisture to the outside, the drying process of the garment can be performed more quickly, and evaporating the moisture from the dry matter only by the temperature of the air flowing into the drum Therefore, by controlling the temperature of the air flowing into the drum low, it is possible to prevent damage to the dry matter.

In other words, the conventional drum dryer is configured to contact the dry object with the hot air as much as possible in order to dry the clothes, so that if the temperature of the air flowing into the drum is excessively increased for the rapid drying, Not only is this damage damaged, but even when the drum is rotated to increase the contact area between the hot air and the clothes, the clothes that are in contact with the inner surface of the drum are substantially separated from the hot air flow path, so that they are in contact with the hot air. Rather, the clothing is excessively dried and damaged, and the clothing away from the hot air flow path has a problem in that it remains undried.

However, the present invention is configured to heat the drum itself, so that it takes time and energy to heat the drum initially, but easily transfers heat from the drum itself to clothes that are difficult to come into contact with hot air, and thus to the whole to be dried. Since it is possible to heat evenly, in particular, there is a large number of clothes, which are bundled together, thereby fundamentally preventing local drying, which delays drying of 20% to 50% of clothes, and not only improves the overall drying efficiency. It is possible to lower the temperature of the air blown into the drum as compared to the conventional, so as not to damage the clothes during the drying process.

The heating unit may heat the rotating drum by convection using a heat source and a blowing fan, but is configured to heat by radiation for convenience of installation.

At this time, in order to prevent the heat loss of the heating portion toward the opposite side of the drum, further comprising a reflecting plate formed between the heating portion and the inner surface of the cabinet, the heat source radiated to the other side of the drum through the reflecting plate Allow the drum to heat up.

The heating unit is formed of any one of a halogen lamp, a far infrared lamp, and a heating wire.

The cabinet is generally formed in a cube shape or the like in consideration of an installation space. Therefore, since the inner space of the cabinet is also formed in a hexahedral shape, a space portion including an edge region is formed between the drum and the cylindrical shape. On the other hand, in order to increase the efficiency of radiant heat conduction, the shorter the distance between the drum and the heating part is, the more advantageous it is. Therefore, it is preferable that the said heating part is provided so that the said drum may face the edge area | region of the said hexahedron from a viewpoint of a heating efficiency or a space efficiency.

The drum is formed of a metal material with a high heat capacity, and is formed in two layers with an air layer therebetween to retain heat for a long time. As the air layer is formed between the outer surface and the inner surface of the drum, the heat transferred from the heating portion can be maintained for a predetermined time in the drum.

On the other hand, according to another field of the invention, the control method of the drum type clothes dryer, comprising the steps of: heating the drum with the heating unit; After the drum is heated above a predetermined temperature, introducing air into the drum and rotating the drum; It provides a control method of a drum-type clothes dryer comprising a.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The following examples are provided to aid the understanding of the present invention and should not be construed as limiting the scope of the present invention, and those skilled in the art may make various modifications and improvements within the scope of the technical idea of the present invention described in the claims.

Figure 2 is a partially cut perspective view showing the configuration of a drum type clothes dryer according to an embodiment of the present invention, Figure 3 is a schematic diagram for explaining the operating principle of FIG.

Drum clothes dryer according to an embodiment of the present invention is a rectangular parallelepiped shape, the cabinet 110 having a receiving portion therein, the drum 116 rotatably installed in the interior space of the cabinet 110, the drum 116 The first air flow path 120 for supplying the intake air, the second air flow path 122 for exhausting the air deprived of moisture from the clothes of the drum 116, and the first air flow path 120 for heating the intake air. The first heat exchanger 130 formed as a condenser, the flow fan 140 formed in the second air flow path 122 to exhaust the air in the drum 116, and the drum 116 are radiated outside the drum 116. And a reflecting plate 150 formed between the heating wire 160 and the inner surface of the cabinet 110 to heat the drum 116 by reflecting the heat leaked from the heating wire 160 to heat the drum 116. It is composed.

The cabinet 110 is formed of a hexahedral 112-shaped steel for convenience of installation, and has a hexahedral space therein.

The drum 116 is installed in a cylindrical shape so as to rotate about an axis substantially parallel to the bottom surface of the cabinet 110 in an inner space of the cabinet 110, and a first air flow path through which intake air flows. 120 is connected and is connected to the second air flow path 122 through which exhaust air flows to the other side. The drum 116 is connected to the drive shaft of the motor 118 on its outer circumferential surface to receive power and rotate.

Although the inlet may not be exposed to the outside of the cabinet 110, the outlet 122 ′ of the second air passage 122 may be exposed to the outside of the cabinet 110. . The shape of the first air passage 120 and the second air passage 122 need not be particularly limited, and the direction or position of each portion constituting the passage may be changed to suit the space inside the cabinet.

A first heat exchanger 130 is installed in the first air flow path 120 to heat the air flowing into the first air flow path 120 to a temperature of about 50 ° C. or more, preferably 50 to 60 ° C. The drum 116 enters a state in which the temperature is raised to.

One side of the cabinet 110 is provided with an evaporator as the second heat exchanger 132. The first heat exchanger 130 and the second heat exchanger 132 form a thermodynamic cycle (steam compression cycle), and for this purpose, the cabinet 110 further includes a compressor 134 and an expansion mechanism 136. . The compressor 134 and the expansion mechanism 136 are preferably installed below the drum or lower than the drum, and are connected to the first heat exchange part 130 and the second heat exchange part 132 by a pipe 138. To form a closed loop. This vapor compression cycle acts as a heat pump on the air flowing through the first air flow path 130. In particular, the compressor 134 is provided on the inlet side of the first air flow path 120 to provide heat to the incoming air to assist the heating of the first heat exchanger 130 to the incoming air. Therefore, while the heating effect of the inlet air is doubled, the cooling effect of the compressor 134 can be obtained, and the overall efficiency of the steam compression cycle system is improved.

The air flow fan 140 is installed in the second air flow path 122. The fan 140 receives a rotational force from the driving unit 118 to generate an air flow through which the air is discharged from the first air passage 120 to the outside through the second air passage 122 through the drum 116.

An auxiliary fan 140 ′ is mounted on the other side of the driving unit. The auxiliary fan 140 ′ generates an air flow flowing into the driving unit 118 to prevent the driving unit from reaching a predetermined temperature. At this time, the second heat exchange part 132 is installed in a line with the auxiliary fan 140 'so that the air flow generated from the auxiliary fan 140' passes through the second heat exchange part 132 and the temperature is increased. It is lowered to further improve the cooling of the driving unit 118.

The second heat exchange part 132 has an opening 112 ′ formed on the cabinet 110 at the rear, and serves as an outlet of air for cooling the second heat exchange part 132.

The heat source 160, which is a heating unit for heating the rotating drum 116, is arranged around the drum 116, and the reflecting plate 150 reflecting the heat of the heat source 160 on the opposite side not facing the drum 116 is provided. Is installed. This allows the heat source 160 to heat the drum 116 itself by radiation, thereby facilitating heat transfer from the inner surface of the drum, even in garments where it is difficult to contact hot air for drying, thereby making the garment local. It becomes possible to prevent drying.

At this time, instead of the heating wire 160 for heating the drum 116, it is possible to apply a halogen lamp, far-infrared lamp and the like that can effectively transfer heat by radiation.

As shown in FIG. 4, a plurality of heat sources 161, 162, 160 for heating the drum 116 may be formed to surround a portion of the drum 116. In this case, the heat source 160 is arranged to face the outer circumferential surface of the drum 116 to heat the drum 116 while minimizing leakage of heat generated from the heat source 160. At the same time, the heat resistant reflecting plates 151, 152, and 150 are installed on the rear surface of the heat source 160 at a predetermined distance from each other, so that the heat generated from the heat source 160 is directed toward the inner surface of the cabinet 110, thereby reflecting it to the drum 116. To contribute to heating. A cradle 163 made of a heat-resistant ceramic material for fixing the heat source 160 in a state spaced apart from the reflector plate 150 and the heat source 160 is inserted to prevent thermal deformation of the reflector plate 150 by the heat of the heat source 160. Is installed.

Hereinafter, the operating principle of the drum-type clothes dryer according to the present invention described above in detail.

When the user operates the operation switch (not shown) to dry using the drum type clothes dryer according to the present invention, the motor 118 rotates and starts to rotate the drum 116, and at the same time, the heating wire 160 Power is applied and heat from the heating wire 160 is reflected directly or by the reflecting plate 150 to the drum 116 to heat the drum 116 itself.

At the same time, the blowing fan 140 rotates to generate a suction force, and air outside the dryer flows into the inlet of the first air flow path 120. At this time, as heat is exchanged with the air introduced from the condenser 130, which is the first heat exchanger 130, the air supplied to the drum 116 through the first air flow path 120 is heated to a drum ( 116).

In order to prevent direct damage to clothes, the temperature of the air supplied through the first air flow path 120 is controlled to a predetermined temperature range, for example, about 50 ° C. To this end, the first air flow path 120 is provided with a temperature sensor (not shown).

 Air entering the drum is maintained at a temperature of about 50 to 60 ℃. The hot air maintaining this temperature can be dried smoothly without damaging the dry matter inside the drum 116. The hot air introduced into the drum 116 transfers heat while being in contact with the moisture-containing dry matter, and also receives moisture from the dry matter and exits the drum with high humidity air. The air flowing out of the drum is discharged to the outside of the cabinet 110 through the second air flow path 122.

Therefore, in the drum type clothes dryer according to the present invention, when power is applied to the heating wire 160 that is a heating unit, the heat generated from the heat source 160 is directly or reflected from the radiant heat source to the outer surface of the drum 116 on which the heat is rotated. The heat is reflected and transmitted in the form of radiation, and this heat causes the clothes to be dried to be heated through the drum 116 by conduction, so that the temperature of the entire fabric is uniformly raised to evaporate the moisture inside the object. Promote. As such, the moisture generated in the drum is discharged to the outside through the second air flow path 122 by driving the blower fan 140. As a result, even if the temperature of the dry air supplied through the first air passage 120 is lowered to about 50 ° C., the drum 116 itself is heated, thereby not causing damage to the clothing which is to be dried, and drying rapidly. The process can be performed.

Meanwhile, in order to further improve energy efficiency, after the drum 116 is heated to a temperature of about 40 ° C., the drum 116 may be rotated and heated dry air may be introduced into the drum 116. It may be.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope described in the claims.

As described above, according to the present invention, there is provided a cabinet comprising: a cabinet; A drum accommodating clothes therein and rotatably formed in the cabinet; Including a heating unit installed in the cabinet to heat the drum, by heating the drum itself by the heating unit, even if the dry material does not directly contact the hot air flow path can be uniformly dried by receiving heat from the heated drum The present invention provides a drum type clothes dryer having faster drying speed and higher drying efficiency.

In addition, the present invention improves the drying efficiency by heating the drum itself containing the to-be-dried product, so that the temperature of the air to be supplied to remove moisture in the drum can be lowered, thereby increasing the temperature of the high temperature supplied to the drum. It is possible to fundamentally eliminate the possibility of damage to dry items such as clothing by the air.

The present invention, by preventing the local undried state of the dry matter, by discharging the water of the dry matter more quickly, despite the additional energy required to heat the drum, rather the consumption of energy required to dry the dry matter Can reduce the cost.

Claims (8)

Cabinet; A drum accommodating clothes therein and rotatably formed in the cabinet; A heating unit installed in the cabinet to heat the drum; A flow path through which air is introduced into the drum; And A flow path through which air is discharged from the drum; Drum type clothes dryer, characterized in that configured to include. The method of claim 1, The heating unit is a drum type clothes dryer, characterized in that for heating the drum by radiation. The method of claim 2, Drum clothes dryer characterized in that it further comprises a reflecting plate formed between the heating portion and the inner surface of the cabinet. The method of claim 2, The heating unit is a drum type clothes dryer, characterized in that any one of a halogen lamp, far infrared lamp. The method according to any one of claims 1 to 4, An edge area is formed in the inner space of the cabinet, The heating unit is a drum type clothes dryer, characterized in that installed in the corner area. delete The method according to any one of claims 1 to 4, The drum is a drum type clothes dryer, characterized in that formed in two layers with an air layer. As a control method of the drum type clothes drier according to any one of claims 1 to 4, Heating the drum with the heating unit; After the drum is heated above a predetermined temperature, introducing air into the drum and rotating the drum; A control method of a drum type clothes dryer, characterized in that it comprises a.

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