KR102555216B1 - Drying machine of low temperature and low pressure type - Google Patents

Abstract

The present invention relates to a dryer for drying clothes, comprising a main body case, a door rotatably coupled to the front surface of the main body case, a drying drum accommodated and rotated inside the main body case, and supplying hot air to the drying drum. In the dryer including a heat pump cycle, a plurality of passage holes are formed at regular intervals on a circumferential surface of the drying drum, and an outer cylinder is installed between the circumferential surface of the drying drum and a space that can be sealed at a predetermined interval. and a venturi tube passing between the main body case and the outer cylinder, sucking air containing water vapor inside the drying drum through a space between the drying drum and the outer cylinder to lower the pressure inside the drying drum. .

Description

Low pressure and low temperature dryer {DRYING MACHINE OF LOW TEMPERATURE AND LOW PRESSURE TYPE}

The present invention relates to a dryer, and more particularly, to a low pressure and low temperature drying clothes without damage such as shrinkage, wrinkling, discoloration, etc., as well as reducing energy consumption to a minimum, thereby greatly improving customer satisfaction. And it relates to a low-temperature dryer.

In recent years, along with washing machines that wash laundry, dryers that dry laundry washed in washing machines are spreading.

A dryer for drying laundry is a type of laundry treatment device that allows hot air to be supplied into the drying drum while the drying drum loaded with laundry rotates in one or both directions to dry wet laundry.

In such a dryer, any one of a gas combustion method, an electric heater method, and a heater pump cycle method is applied to generate high-temperature hot air supplied to the inside of the drying drum.

Among these methods, a heat pump cycle type dryer, which is mainly used recently, has a heat pump cycle including a compressor, a condenser, an expansion valve, and an evaporator inside the dryer. Therefore, when drying starts, the compressor is driven so that the refrigerant circulates through compression, condensation, expansion, and evaporation processes.

In addition, the air introduced into the drying drum is heated to a high temperature by the heat emitted from the condenser, and hot air of high temperature is supplied to the inside of the drying drum to dry clothes in the drying drum.

However, even a heat pump cycle dryer with the highest energy consumption efficiency among various conventional dryers uses hot air at 100 degrees Celsius or more, so the energy consumption efficiency is not greatly improved compared to other dryers. do.

Accordingly, there is a demand for a low-pressure and low-temperature dryer that greatly improves consumer satisfaction by drying clothes without damage such as shrinkage, wrinkles, and discoloration by using a lower pressure and lower temperature and reducing energy consumption to a minimum. is on the rise.

Korean Patent Publication No. 10-2018-0032114 (2018.03.29.)

The present invention has been devised in view of the above problems, and the technical problem to be solved by the present invention is to dry clothes without damage such as shrinkage, wrinkles, discoloration, etc., as well as to minimize energy consumption. It is to provide a low-pressure and low-temperature dryer that greatly improves customer satisfaction.

In particular, by minimizing structural changes in the structure of the conventional heat pump cycle method, energy consumption efficiency is excellent without increasing manufacturing cost, as well as performance is greatly improved, thereby greatly improving customer satisfaction at low pressure and low temperature It is to provide a dryer of the method.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the following description.

A low-pressure and low-temperature dryer according to an embodiment of the present invention for solving the above problems includes a main body case, a door rotatably coupled to the front surface of the main body case, and a drying drum accommodated and rotated inside the main body case. and a heat pump cycle for supplying hot air to the drying drum, wherein a plurality of passage holes are formed at regular intervals on the circumferential surface of the drying drum, and the circumferential surface of the drying drum is sealed at regular intervals. An outer cylinder is installed with a possible space in between, and passes between the main body case and the outer cylinder, but sucks air containing water vapor inside the drying drum through the space between the drying drum and the outer cylinder, thereby reducing the pressure inside the drying drum. It may be configured to include a venturi tube that lowers the.

At this time, a blower operated by a control signal may be installed at one end of the venturi tube.

In addition, the Venturi tube has a tube-shaped large-diameter portion having a constant diameter, a small-diameter portion formed at an intermediate end of the large-diameter portion and having a narrower cross-sectional area than the large-diameter portion, and branching in a direction orthogonal to the small-diameter portion. It is formed as a suction part to form a T-shape.

Meanwhile, the venturi tube may be installed on a circulated pressure reducing line, and at least one non-return valve may be installed on the pressure reducing line so that blown air flows in one direction.

Here, on the pressure reducing line, at least one of a drain valve for discharging condensed water and a pressure control valve for discharging air flowing to the outside when the pressure on the pressure reducing line is higher than a set pressure may be installed.

Other specific details of the invention are included in the detailed description and drawings.

According to the low-pressure and low-temperature type dryer according to an embodiment of the present invention, as well as drying clothes without damage such as shrinkage, wrinkles, discoloration, etc., as well as reducing energy consumption to a minimum, the effect of greatly improving customer satisfaction will be provided. can

In particular, according to the low-pressure and low-temperature type dryer according to an embodiment of the present invention, structural changes in the conventional heat pump cycle type dryer structure are minimized, so that manufacturing cost is not increased and energy consumption efficiency is excellent, as well as performance. As the degree is greatly improved, the effect of greatly improving consumer satisfaction can be provided.

Effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a perspective view showing a dryer configuration according to an embodiment of the present invention.
2 is a cross-sectional view illustrating a configuration of a dryer according to an embodiment of the present invention.
Figure 3 is an enlarged cross-sectional view of a main part of Figure 2;
Figure 4 is a longitudinal cross-sectional view of the main part of Figure 2;
5 is an enlarged view illustrating another type of venturi tube configuration provided in a dryer according to an embodiment of the present invention.
6 is an enlarged view showing another type of venturi tube configuration provided to the dryer according to an embodiment of the present invention.
7 is a cross-sectional view illustrating a configuration of a dryer according to another embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the present embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Thus, in some embodiments, well-known processing steps, well-known structures, and well-known techniques have not been described in detail in order to avoid obscuring the interpretation of the present invention.

Terms used in this specification are for describing embodiments and are not intended to limit the present invention. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. The terms "comprises" and/or "comprising" as used in the specification do not preclude the presence or addition of one or more other components, steps and/or operations other than those mentioned. use as And "and/or" includes each and every combination of one or more of the recited items.

In addition, the embodiments described in this specification will be described with reference to perspective views, cross-sectional views, side views and/or schematic views, which are ideal exemplary views of the present invention. Accordingly, the shape of the illustrative drawings may be modified due to manufacturing techniques and/or tolerances. Therefore, embodiments of the present invention are not limited to the specific shapes shown, but also include changes in shapes generated according to manufacturing processes. In addition, in each drawing shown in the embodiment of the present invention, each component may be shown somewhat enlarged or reduced in consideration of convenience of description.

Hereinafter, a dryer according to an embodiment of the present invention will be described in detail based on the accompanying drawings.

1 is a perspective view showing a configuration of a dryer according to an embodiment of the present invention, FIG. 2 is a cross-sectional view illustrating a configuration of a dryer according to an embodiment of the present invention, FIG. 3 is an enlarged cross-sectional view of main parts of FIG. 2, and FIG. is a longitudinal cross-sectional view of the main part of FIG. 2 .

As shown in FIGS. 1 to 4, the dryer 10 according to the embodiment of the present invention includes a body case 12, a door 16 rotatably coupled to the front surface of the body case 12, and , It may be made of a configuration including a drying drum 20 that is accommodated inside the body case 12 and rotated.

At this time, a handle for opening and closing the door 16 may be formed on one front side of the door 16 .

The body case 12 includes a front plate on which the door 16 is installed, both side plates and rear plates, and a bottom plate, and further includes a top plate 14 constituting an upper surface, and is configured in a substantially hexahedral shape. It can be.

A heat pump cycle 30 for generating hot air may be provided inside the body case 12 of the dryer 10 .

The heat pump cycle 30 includes a compressor 32, a condenser 34, an expansion valve 36, and an evaporator 38, and the refrigerant circulates through the heat pump cycle 30 for phase change and temperature / Through pressure change, hot air is generated.

In addition, a hot air supply passage for supplying hot air generated by the heat pump cycle 30 to the inside of the drying drum 20 is formed inside the body case 12, wherein the hot air supply passage includes a circulation supply passage can be configured.

The circulation supply passage includes a suction duct 26 that sucks high-temperature air generated through the heat pump cycle 30 into the drying drum 20 and air discharged from the drying drum 20 into the heat pump cycle 30. ) may be configured to include an exhaust duct 24 guiding to the side.

Here, the intake duct 26 connects the space where the condenser 34 is located and the air inlet hole formed on the rear surface of the drying drum 20, and the exhaust duct 24 connects the air formed on the lower front surface of the drying drum 20. A discharge hole (not shown) and a space where the evaporator 38 is located are connected.

At this time, the space where the evaporator 38 is located and the space where the condenser 34 is located may communicate, and thus the air heated by heat exchange with the refrigerant while passing through the condenser 34 flows along the intake duct 26. It flows and is supplied into the drying drum 20.

Meanwhile, the hot air supplied into the drying drum 20 dries the laundry put into the drying drum 20 . At this time, the high-temperature, high-humid air that has absorbed moisture during the laundry drying process passes through the filter assembly to filter foreign substances, and then is guided to the exhaust duct 24 by the drying fan.

Then, the high-temperature and high-humidity air flowing along the exhaust duct 24 is condensed while passing through the evaporator 38 . Moisture contained in the air supplied to the exhaust duct 24 is condensed, and low-temperature dry air is supplied toward the condenser 34.

Regarding the refrigerant circulation of the heat pump cycle 30 described above, as the compressor 32 operates, the refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant state and sent to the condenser 34 .

And, in the condenser 34, the high-temperature gaseous refrigerant is phase-changed into a high-temperature and high-pressure liquid refrigerant. ) enters the interior.

The high-temperature and high-pressure liquid refrigerant phase-changed in the condenser 34 is expanded into a low-temperature, low-pressure two-phase refrigerant while passing through the expansion valve 36, and then evaporated into a low-temperature, low-pressure gaseous refrigerant in the evaporator 38. At this time, the wet air flowing along the exhaust duct 24 is condensed by the cool air released in the process of evaporating the refrigerant in the evaporator 38 .

On the other hand, a plurality of passage holes 22 are formed at regular intervals on the circumferential surface of the drying drum 20, and the outer cylinder portion is spaced apart from the circumferential surface of the drying drum 20 on which the plurality of passage holes 22 are formed. 200 may be installed.

At this time, fitting protrusions 20a are formed at both ends of the circumferential surface of the drying drum 20 along the circumferential direction, and the fitting protrusions 20a are fitting grooves of the elastic member 210 installed on the outer cylinder 200 ( Reference numerals not given) may be inserted and coupled in a fitted state.

Therefore, in normal times, a space 300 having a certain volume is formed between the circumferential surface of the drying drum 20 and the outer cylinder 200. At this time, the space 300 is shielded by the elastic member 210. By maintaining the state, expansion or contraction can be achieved by wet air, which will be described in detail later.

In addition, the dryer 10 according to the embodiment of the present invention includes a Venturi tube 100 installed in the space between the top plate 14 of the body case 12 and the outer cylinder 200, and the Venturi tube 100 It may be made of a configuration further comprising a blower for blowing air from one side of the.

The blower may be installed at one end of the Venturi tube 100 and blow air to the Venturi tube 100 as it is operated by a control signal.

For example, when the dryer 10 is operated and the drying drum 20 rotates, a blower may be operated in conjunction with this to blow air through the venturi tube 100 .

The venturi tube 100 may be installed in the space between the top plate 14 constituting the body case 12 and the outer cylinder 200, and is composed of a tube-shaped large-diameter portion 130 having a certain diameter, the middle At the end, a small diameter portion 120 with a narrower cross-section than the large diameter portion 130 is formed, and a suction portion 110 branching in a direction orthogonal to the small diameter portion 120 is formed to form a T-shape. can

At this time, the suction part 110 may be installed so that its end penetrates the outer cylinder part 200 and is positioned in the space part 300 between the outer cylinder part 200 and the drying drum 20 .

The operating relationship of the dryer 10, which can be configured as described above, will be described as follows.

In order to dry dehydrated clothes, the door 16 is opened, clothes to be dried are put into the drying drum 20, and then the door 16 is closed and an operating switch is turned on.

Accordingly, the high-temperature air generated by the operation of the heat pump cycle 30 is supplied to the drying drum 20 through the intake duct 26 to dry the clothes, and the air containing water vapor generated as the clothes are dried is It is discharged again through the exhaust duct 24 and circulates through the heat pump cycle 30 .

At the same time, the blower also operates to blow air at a set pressure to the venturi tube 100.

Referring to FIG. 3 , when the air blown by the blower passes through the venturi tube 100 and passes through the large diameter part 130 and then through the small diameter part 120, the flow rate increases due to the Venturi effect and at the same time the pressure goes down.

Fluids including air flow from a place of high pressure to a place of low pressure, and air containing water vapor generated as clothes are dried in the drying drum 20 passes through the passage hole 22 of the drying drum 20. is introduced into the space 300 between the drying drum 20 and the outer cylinder 200, and the air containing water vapor introduced into the space 300 has a pressure at the suction part 110 of the venturi tube 100. Through this, the flow is made to the small diameter portion 120 having a low pressure.

Therefore, the air containing water vapor generated as clothes are dried in the drying drum 20 is discharged to the outside of the drying drum 20 at a high speed, so that the pressure inside the drying drum 20 is reduced according to the embodiment of the present invention. According to an example, it can be lowered compared to the conventional dryer 10 in which the venturi tube 100 is not installed.

When the pressure inside the drying drum 20 is lowered as described above, the temperature of the hot air for drying clothes, that is, the hot air supplied to the drying drum 20 through the heat pump cycle 30 can also be lowered. That is, when the temperature is the same, the vaporization of water vapor is performed quickly under a relatively low pressure. As the pressure inside the drying drum 20 is lowered by the Venturi effect, the drying drum 20 through the heat pump cycle 30 Even if the temperature of the hot air supplied to the dryer is relatively lowered, the drying efficiency can be improved by the low pressure inside the drying drum 20.

Therefore, by lowering the temperature of the hot air introduced into the drying drum 20 (from about 100 degrees Celsius to 80 degrees Celsius), it is possible to greatly reduce damage to clothes caused by high temperatures and improve drying efficiency, especially at high temperatures. Since there is no need to supply hot air, it is possible to reduce the number of expensive parts, thereby lowering the production cost and further reducing energy consumption.

Meanwhile, an elastic member 210 is installed between the circumferential surface of the outer cylinder 200 and the circumferential surface of the drying drum 20 to form a sealed configuration, including water vapor in the drying drum 20 and the space 300. When the pressure is lowered as air is sucked in and discharged through the suction part 110 of the venturi tube 100, or air containing a large amount of water vapor passes through the passage hole 22 of the drying drum 20, the space part 300 ), expansion or contraction may be made in response to the momentary increase in pressure.

At this time, when the elastic member 210 rapidly expands, some steam-containing air may be discharged into the space between the case body and the drying drum 20 through a gap between the elastic member 210 and the fitting protrusion. .

On the other hand, Figure 5 is an enlarged view showing the configuration of another type of Venturi tube 100a provided in the dryer 10 according to an embodiment of the present invention, the boundary between the large diameter part 130a and the small diameter part 120a and A boundary between the small diameter portion 120a and the suction portion 110a may be formed in a curved shape.

In this case, as air flows smoothly, generation of vortices is reduced and noise can be reduced.

On the other hand, Figure 6 is an enlarged view showing the configuration of another type of Venturi tube (100b) provided in the dryer 10 according to an embodiment of the present invention, the small diameter part (120b) and the large diameter part ( A plurality of 130b) may be formed in a serial direction, and a plurality of suction parts 110b diverging from each of the small diameter parts 120b may be formed in a parallel direction.

In this case, as the amount of intake of air containing water vapor inside the drying drum 20 increases, drying efficiency may be further improved.

Meanwhile, FIG. 7 is a cross-sectional view illustrating a configuration of a dryer 10 according to another embodiment of the present invention, and the same reference numerals are assigned to the same parts as in the previous embodiment, and repeated descriptions will be omitted. .

Referring to FIG. 7 , a Venturi tube 100 may be installed in the pressure reducing line 500.

The decompression line 500 is installed in a circular manner, and the venturi tube 100 installed in the decompression line 500 may be installed in the space between the top plate 14 and the outer cylinder 200 as in the previous embodiment. And, the operating relationship of the Venturi tube 100 is the same as in the previous embodiment.

In addition, a first non-return valve 510 is installed in a portion of the pressure reducing line 500 located in the space between the back plate and the drying drum 20, and is located in the space between the back plate and the drying drum 20. A second non-return valve 520 may also be installed in the area to be performed.

Also, a drain valve 530 and a pressure control valve 540 may be installed in a portion of the pressure reducing line 500 located in a space between the bottom plate and the drying drum 20 .

That is, when air containing water vapor inside the drying drum 20 is introduced into the pressure reducing line 500 by the Venturi effect by the Venturi tube 100, the first non-return valve 510 and the second non-return valve 520 ) performs a function of preventing the air containing water vapor flowing through the pressure reducing line 500 from flowing backward.

In addition, the condensed water contained in the air containing steam introduced into the decompression line 500 and condensed is collected at the bottom of the decompression line 500 by its own weight, and the condensate collected in this way is discharged to the outside through the drain valve 530 it can be done

In addition, when the pressure in the pressure reduction line 500 is equal to or higher than the set pressure, the pressure control valve 540 may discharge air containing water vapor to adjust the pressure within the pressure reduction line 500 .

In this way, the air blown by the blower and sucking the air containing water vapor inside the drying drum 20 while passing through the venturi tube 100 is not immediately discharged, but condensed water is discharged while circulating through the pressure reducing line 500, and setting By discharging a part to the outside in accordance with the pressure, an effect of significantly reducing noise generation may be provided.

In addition, as the blown air continues to circulate through the decompression line 500 under the set pressure, even if the blowing intensity of the blower is significantly reduced, the decompression efficiency inside the drying drum 20 is maintained, and the drying efficiency is improved even with hot air at a low temperature. It can provide an effect of improving energy consumption efficiency, such as drastically reducing drying time.

Those skilled in the art to which the present invention pertains will understand that the present invention can be embodied in other specific forms without changing its technical spirit or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. The scope of the present invention is indicated by the following claims rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included in the scope of the present invention. do.

10: dryer 12: body case
14: top plate 16: door
20: drying drum 22: through hole
24: exhaust duct 26: intake duct
30: Heat pump cycle 100, 100a, 100b: Venturi tube
110, 110a, 110b: intake part 120, 120a, 120b: small diameter part
130,130a,130b: large diameter part 200: outer tube part
210: elastic member 300: space
500: pressure reducing line 510: first non-return valve
520: second check valve 530: drain valve
540: pressure control valve

Claims (5)

A refrigerant composed of a body case, a door rotatably coupled to the front surface of the body case, a drying drum accommodated in the body case and rotated, and a compressor, a condenser, an expansion valve, and an evaporator to supply hot air to the drying drum. In the dryer including a heat pump cycle for generating hot air through phase change and temperature / pressure change of
A plurality of passage holes are formed at regular intervals on the circumferential surface of the drying drum,
An outer cylinder is installed between the circumferential surface of the drying drum and a sealable space at regular intervals,
Fitting protrusions are formed along the circumferential direction at both ends of the circumferential surface of the drying drum, and the fitting protrusions are coupled in a fitted state by inserting fitting grooves of elastic members installed in the outer cylinder,
It is configured to include a venturi tube that passes between the main body case and the outer cylinder, and lowers the pressure inside the drying drum by sucking air containing water vapor inside the drying drum through a space between the drying drum and the outer cylinder. A low-pressure and low-temperature dryer.
According to claim 1,
A low-pressure and low-temperature type dryer, characterized in that a blower operated by a control signal is installed at one end of the venturi tube.
According to claim 1,
The venturi tube,
It is formed of a tube-shaped large-diameter portion having a certain diameter, a small-diameter portion formed at the middle end of the large-diameter portion and having a narrower cross-sectional area than the large-diameter portion, and a suction portion branching in a direction orthogonal to the small-diameter portion, forming a T shape. Low-pressure and low-temperature dryer, characterized in that forming a form.
According to claim 1 or 3,
The venturi tube,
It is installed on the circulating pressure reducing line,
Low-pressure and low-temperature type dryer, characterized in that at least one non-return valve is installed in the pressure reducing line so that the blown air flows in one direction.
According to claim 4,
On the pressure reducing line, at least one of a drain valve for discharging condensed water and a pressure control valve for discharging air flowing to the outside when the pressure on the pressure reducing line is higher than the set pressure, low pressure and Low temperature dryer.

Images