KR101192197B1 - Clothes dryer with vapor compression cycle system - Google Patents

Abstract

The present invention relates to a clothes dryer having a vapor compression cycle system, comprising: a cabinet; A drum rotatably installed in the cabinet in the forward and reverse directions; A first air flow passage formed in communication with the drum to supply air to the drum; A condenser arranged to exchange heat with air in the first air flow path; A second air flow passage connected to the drying vessel and in communication with the outside of the cabinet; A driving unit generating a driving force for rotating the drying vessel; A blowing fan rotatable in the forward and reverse directions; An evaporator installed to face the blowing fan; Including, so that the drum is rotatably installed in the forward and reverse direction at the same time, the dry items are not agglomerated with each other, the air heated by heat exchange with the condenser while passing through the first air flow path by heat exchanged evenly with the dry matter in the drum, Provided is a clothes dryer having a steam compression cycle system that can increase efficiency.

Clothes dryer, waste heat, high temperature

Description

Clothes dryer with steam compression cycle system {CLOTHES DRYER WITH VAPOR COMPRESSION CYCLE SYSTEM}

1 is a partial cutaway perspective view showing the configuration of a drum-type clothes dryer according to an embodiment of the present invention.

2 is an enlarged perspective view of portion 'A' of FIG.

3 is a partial perspective view showing the configuration of the drum drive unit of FIG.

DESCRIPTION OF THE REFERENCE SYMBOLS

110: cabinet 116: drum

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

130: condenser 132: evaporator

134: compressor

The present invention relates to a clothes dryer, and more particularly, to a clothes dryer including a steam compression cycle system and capable of ensuring a stable steam compression cycle by appropriately maintaining a temperature inside a cabinet.

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.

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 drying 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 object is dried with hot air at 100 ° C. or higher, the damage is likely to occur depending on the material of the dry object in the drying process.

On the other hand, the condensation type clothes dryer has the advantage of being able to be built-in type because there is no need for the exhaust duct to release air to the outside of the clothes dryer, and the energy efficiency is higher than the exhaust method, but drying time There is a disadvantage that it is difficult to manufacture a long and large capacity.

Under this background, there is a need for an improved clothes dryer with high energy efficiency.

The present invention has been made to solve the problems of the prior art as described above, it is an object of the present invention to provide a clothes dryer with high energy efficiency by supplying hot air to the dry object in a steam compression cycle system with high energy efficiency.

It is another object of the present invention to keep the temperature in the cabinet within an appropriate range to ensure a stable vapor compression cycle system.

Another object of the present invention is to provide a clothes dryer having excellent performance and operation efficiency of a component of a steam compression cycle system.

In addition, another object of the present invention is to increase the drying efficiency by supplying hot air into the drum so as to uniformly contact the dry matter.

The present invention, in order to achieve the object as described above, the cabinet; A drum rotatably installed in the cabinet in the forward and reverse directions; A first air flow passage formed in communication with the drum to supply air to the drum; A condenser arranged to exchange heat with air in the first air flow path; A second air flow passage connected to the drum and in communication with the outside of the cabinet; A driving unit generating a driving force for rotating the drum; A blowing fan rotatable in the forward and reverse directions; An evaporator installed to face the blowing fan; It provides a clothes dryer having a steam compression cycle system comprising a.

Since the drum is rotatably installed in the forward and reverse directions at the same time, the dry items in the drum do not agglomerate with each other, and the air heated by heat exchange with the condenser while passing through the first air flow path is uniformly heat exchanged with the dry items in the drum, thereby improving drying efficiency. You can increase it.

As the blower fan is rotated in the forward and reverse directions, cool air is supplied from the evaporator into the cabinet. This allows the temperature inside the cabinet to be maintained in a temperature range similar to that of the outside air, ensuring operational reliability of each component of the steam compression cycle system.

In this case, the driving unit is formed of a brushless DC motor having high energy efficiency and easy rotational driving in the forward and reverse directions, and the blower fan is driven by the driving unit. Therefore, it is not necessary to provide a separate drive unit for driving the blower fan in reverse rotation. That is, the driving unit rotates the drum alternately in the forward direction and in the reverse direction without rotating the drum only in one direction during the drying step of the dried object, so that the blower fan is also rotated alternately in the forward direction and the reverse direction, and the evaporator It is possible to supply ambient cool air into the cabinet.

At this time, the evaporator is installed to communicate with the outside air, and is configured to be vented from the outside air through the evaporator to the inside of the cabinet by the blowing fan, it is possible to send a larger amount of air into the cabinet by the blowing fan.

On the other hand, according to another field of the invention, the present invention is a control method of a clothes dryer having the steam compression cycle system, comprising the steps of: rotating the drum in a forward direction; Intermittently rotating the drum in a reverse direction; It provides a control method of a clothes dryer having a steam compression cycle system comprising a. This not only improves the drying efficiency of the dry matter, but also makes it possible to smoothly supply the cool air around the evaporator to the inside of the cabinet, thereby maintaining the temperature inside the cabinet below a predetermined value, thereby constituting the steam compression cycle system. The reliability of the parts can be secured.

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.

1 is a partially cutaway perspective view illustrating a configuration of a drum type clothes dryer according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view of part 'A' of FIG. 1, and FIG. 3 is a view illustrating a configuration of the drum driving unit of FIG. 1. Some perspective view.

As shown in the figure, the drum type clothes dryer according to an embodiment of the present invention, the cabinet 110 having a receiving portion therein in the shape of a cube, and the drum 116 rotatably installed in the inner space of the cabinet 110. A drive unit 118 formed of a BCD motor so as to rotationally drive the drum 116 in the forward and reverse directions with the belt 142, a first air flow path 120 for supplying intake air to the drum 116, A second air flow path 122 for exhausting air deprived of moisture from the clothes of the drum 116, a condenser 130 arranged in the first air flow path 120 to heat intake air, and a drive shaft of the driving unit 118. It is configured to include a blower fan 141 rotates by, and an evaporator 132 connected to the condenser 130 to form a vapor compression cycle system.

1 and 3, the drum 116 is installed in a cylindrical shape to rotate about an axis substantially parallel to the bottom surface of the cabinet 110 in the interior space of the cabinet 110, The first air flow path 120 through which intake air flows is connected to one side thereof, and the second air flow path 122 through which exhaust air flows to the other side thereof. The drum 116 is rotationally driven by being connected to the drive shaft of the motor 118 and the belt 142 on its outer circumferential surface.

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 condenser 130 is installed in the first air passage 120 to heat the air flowing into the first air passage 120 to raise the temperature to about 65 ° C. or higher, preferably 50 to 70 ° C. Enter the drum 116 in a state.

One side of the cabinet 110, the evaporator 132 is installed. The condenser 130 and the evaporator 132 forms a thermodynamic cycle (steam compression cycle), and for this purpose, the cabinet 110 further includes a compressor 134 and an expansion mechanism (not shown). Preferably, the compressor 134 and the expansion mechanism are installed below the drum 116 or lower than the drum 116, and are connected to the condenser 130 and the evaporator 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 the inlet air to assist the heating of the condenser 130 to the incoming air.

The blowing fan 141 is mounted on the other side of the driving unit. The blowing fan 141 generates an air flow flowing to the driving unit 118 to prevent the temperature inside the cabinet 110 from reaching a predetermined temperature or more. At this time, when the driving unit 118 rotates the drum 116 in the reverse direction, the blower fan 141 also reverses the rotation 96 to cool the air (about 18 degrees Celsius or so) from the evaporator 132. Induced in the direction of the supply to the inside of the cabinet (110). When the driving unit 118 rotates the drum 116 in the forward direction 95, the blower fan 141 also rotates forward 96 so that the air inside the cabinet is passed through the evaporator 132. Air in the direction.

As shown in FIG. 2, the evaporator 132 is provided around the vent 112 ′ of the cabinet 110 to supply more air cooled by the heat exchanger with the evaporator 132 to the inside of the cabinet 110. Ventilation holes 132a are formed in the evaporator case, and the evaporator 132 is installed in a line with the blower fan 141 so as to allow air to penetrate the front and rear surfaces of the evaporator 132. More air is introduced by the wind power generated from 141, and more heat exchange occurs as the air introduced from the outside passes through the evaporator 132. As a result, the internal temperature of a conventional dryer cabinet, which is typically about 5 ° C. to 8 ° C. higher than that of the outside, can be maintained to be similar to the outside air temperature. The overall efficiency (COP) of the cycle system can be improved.

The air flow fan 140 is installed in the second air flow path 122. The fan 140 may receive a rotational force from the driver 118, but may be rotated by a separate driver. When the fan 140 receives the rotational force from the driving unit 118, the fan 140 may increase the space utilization inside the cabinet, and thus does not require a separate rotation driving device.

The flow fan 140 generates air flows from the first air flow path 120 to the outside through the second air flow path 122 through the drum 116.

Hereinafter, the operating principle of one embodiment of the present invention will be described in detail.

When the drying process is started with the clothes dryer according to an embodiment of the present invention, the BCD motor 118 rotates the drum 116 in the forward direction, and at the same time, the air outside the dryer is placed on the first air passage 120. The dry air heated by heat exchange with the condenser 134 is introduced into the drum 116, and the flow fan 140 is rotated so that the wet air containing moisture from the object to be dried is passed through the second air flow path 122. Discharge it. Then, the blowing fan 141 provided at the rear of the BC motor 118 rotates in the forward direction 95 and discharges the waste heat inside the cabinet through the vent 112 'in the direction of reference numeral 97.

After the drum 116 is rotated in the forward direction for a predetermined time, the drum 116 is rotated in the reverse direction for a shorter time. As a result, hot air from the first air flow path 120 may be uniformly contacted with the dry matter inside the drum 116. At the same time, the blowing fan 141 installed at the rear of the BCD motor 118 also rotates in the reverse direction 96, through the air vent 112 'and the vent 132a of the evaporator 132 from the outside of the cabinet 110. Inflow in the cabinet 110 in the direction of reference 98. At this time, the incoming air is heat exchanged with the evaporator 132 so that the temperature is very low, it is possible to maintain the temperature inside the cabinet 110 similar to the temperature of the outside air.

On the other hand, although not described in the embodiment of the present invention, the temperature sensor is provided inside the cabinet, and only if the temperature inside the cabinet measured by the temperature sensor becomes high enough to cause a problem in the normal operation of the steam compression cycle system, it is detected By rotating the drum and the blowing fan in the reverse direction, it may be configured to intensively introduce the cool air into the cabinet.

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 rotatably installed in the cabinet in the forward and reverse directions; A first air flow passage formed in communication with the drum to supply air to the drum; A condenser arranged to exchange heat with air in the first air flow path; A second air flow passage connected to the drum and in communication with the outside of the cabinet; A driving unit generating a driving force for rotating the drum; A blowing fan rotatable in the forward and reverse directions; An evaporator installed to face the blowing fan; Including, so that the drum is rotatably installed in the forward and reverse direction at the same time, the dry items are not agglomerated with each other, the air heated by heat exchange with the condenser while passing through the first air flow path by heat exchanged evenly with the dry matter in the drum, Provided is a clothes dryer having a steam compression cycle system that can increase efficiency.

In addition, the present invention is configured to supply cool air from the evaporator to the inside of the cabinet by rotating the blower fan in the forward and reverse directions, thereby maintaining the temperature inside the cabinet in a temperature range below the set value, the steam compression cycle system The operation reliability of each component of the can be secured.

In addition, the present invention, by forming the drive unit with a brushless DC (Brushless DC) motor, it provides a clothes dryer with high energy efficiency and easy rotational drive in the forward and reverse directions.

In addition, the present invention, by allowing the blowing fan to be driven by the drive unit, by rotating the drum in the reverse direction intermittently, without rotating the drum only in one direction, the air to cool the heat to exchange heat with the evaporator Can be supplied inside the cabinet.

In addition, the present invention, the evaporator is installed so as to communicate with the outside air, it is configured to be vented into the cabinet through the evaporator from the outside air by the blowing fan to send more air volume into the cabinet by the blowing fan. do.

Claims (4)

Cabinets; A drum rotatably installed in the cabinet in the forward and reverse directions; A first air flow passage formed in communication with the drum to supply air to the drum; A condenser arranged to exchange heat with air in the first air flow path; A second air flow passage connected to the drum and communicating with an outside of the cabinet to exhaust the air discharged from the drum to the outside; A driving unit generating a driving force for rotating the drum; A blowing fan rotatable in the forward and reverse directions; An evaporator facing the blower fan and installed to communicate with outside air; Including, The blower fan induces an air flow direction to induce the outside air passing through the evaporator to the inside of the cabinet or to exhaust the air in the cabinet passing through the evaporator to the outside of the cabinet. Clothes dryer. The method of claim 1, And the driving unit is a brushless DC motor capable of forward and reverse rotational driving, and the blower fan is driven by the driving unit. delete A control method of a clothes dryer having a steam compression cycle system according to claim 1 or 2, Driving the drum to rotate in a forward direction; Intermittently rotating the drum in a reverse direction; Including, Rotating driving the drum in a reverse direction includes changing the rotational direction of the blower fan to introduce external air cooled into the cabinet to maintain a temperature inside the cabinet within a predetermined range. Control method of the dryer.

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