KR20070087829A - Indoor unit of air conditioner - Google Patents

Abstract

An indoor unit of an air conditioner is provided to increase suction and discharge wind amount and reduce noise by discharging heat-exchanged air after suctioning air from a front surface to the front through a side portion, and to easily attach and detach a filter when cleaning the filter by installing the filter in the front of the device. An indoor unit of an air conditioner comprises a front surface frame(200), a base frame(400), a guide frame(300), a heat exchanger(500) and a front surface panel(100). The front surface frame suctions air from a front surface. The base frame is provided with a discharge port in a side surface and a bottom surface, has a motor mounting portion for driving a blow fan, and is coupled to the front surface frame. The guide frame is equipped between the front surface frame and the base frame, and guides air flow. The heat exchanger is equipped between the front surface frame and the guide frame. The front surface panel is installed in the front of the base frame so as to be spaced.

Description

Indoor unit of air conditioner {INDOOR UNIT OF AIR CONDITIONER}

1 is an external perspective view of an indoor unit according to the present invention

2 is an exploded perspective view of FIG.

Figure 3 is a cross-sectional view of the indoor unit according to the present invention, a cross-sectional view along the line I-I of FIG.

Figure 4 is a plan view of the portion A of Figure 2 for showing the edge structure of the front panel constituting the indoor unit of the present invention

Figure 5 is a perspective view showing a separate front frame constituting the indoor unit of the present invention

Figure 6 is a perspective view showing a guide frame constituting the indoor unit of the present invention

FIG. 7 is a front view of FIG. 6

8 is a cross-sectional view along the line II-II of FIG. 6.

9 is a graph showing the noise characteristics according to the ratio between the turbofan diameter and the orifice radius

10 is a perspective view showing one embodiment of a turbofan constituting the indoor unit of the present invention.

11 is a perspective view showing another embodiment of the turbofan constituting the indoor unit of the present invention.

12 is a graph comparing the noise characteristics of the turbofan and the existing fan applied to the present invention

FIG. 13 is a plan view of FIG. 10.

14 is a view showing a motor mount base frame constituting the indoor unit of the present invention

15 is a rear perspective view of FIG.

16 is a plan view for explaining the electrostatic precipitator installation position of the indoor unit of the present invention;

FIG. 17 is a side view of FIG. 16

18 is a reference diagram that visualizes the flow of the discharge portion of the existing indoor unit

19 to 21 show another embodiment of the indoor unit of the present invention, in which two turbofans are applied and a front view showing scroll structures therein.

22 is a perspective view illustrating an indoor unit to which a cross flow fan is applied as another embodiment of the present invention.

23 to 26 are cross-sectional views showing various modifications in the indoor unit of the present invention to which two cross flow fans are applied.

Explanation of symbols on the main parts of the drawings

100: front panel 200: front frame

300: guide frame 400: base frame

500: heat exchanger 600,600a: turbofan

700: electrostatic precipitator 800: filter

900: cross flow fan

The present invention relates to an air conditioner, and more particularly, to an indoor unit that discharges heat exchanged air forward through a side after front suction, and an indoor unit having an optimized structure capable of lowering noise while increasing the amount of suction and discharge airflow. It is to provide.

In general, an air conditioner repeatedly performs a refrigeration cycle of compression, condensation, expansion, and evaporation of a refrigerant circulating therein.

That is, before entering the compressor, the refrigerant having a low temperature and low pressure gas state is compressed to a high temperature and high pressure gas state by the compressor, and then discharges heat from the condenser to change into a high pressure liquid state, and the pressure drops while passing through the expansion valve. It is changed into a liquid state at low temperature and low pressure. In addition, the refrigerant passing through the expansion valve absorbs heat while passing through the evaporator, changes into a gas state at low temperature and low pressure, and then enters the compressor and is compressed again, cooling or cooling to a necessary place in the course of performing this series of cycles. Heating is done.

On the other hand, the air conditioner, commonly referred to as air conditioner, is divided into a window type that is mainly installed in the window and the indoor unit and the outdoor unit, and a separate type that is installed separately from the indoor and outdoor units. In addition, the indoor unit also has a wall-mount type that can be installed on the wall as both an interior decoration.

The existing indoor unit disclosed in Korean Laid-Open Patent Publication No. 10-2005-0089203 has a structure in which the indoor air sucked from the rear of the indoor unit is discharged to the front side, and detailed description thereof will be omitted.

On the other hand, the conventional indoor unit disclosed in the above-described patent has structural disadvantages as follows.

First, when the indoor unit is installed on the wall, if the distance from the wall is installed too close, there is a problem that the inflow of air is reduced when the rear suction, the noise is increased during the suction.

Next, referring to the structure disclosed in the above-described patent, the turbofan driving motor is installed on the front frame for suction from the back, the disadvantage that the front panel portion that considers much of the visual part of the consumer tremble when driving the motor have.

In addition, since the filter is installed at the rear side of the rear suction structure, the filter should be pulled down from the rear when cleaning the filter and inserted back to the rear after cleaning, thereby causing inconvenience to the user when detaching.

The present invention is to solve the above-mentioned problems, and relates to an indoor unit for discharging the heat exchanged air forward through the side after the front suction, which can be reduced while increasing the amount of suction and discharge airflow (低 騷 音) It is to provide an indoor unit of an optimized structure.

That is, the present invention relates to an indoor unit for discharging the heat-exchanged air to the front through the side after being sucked to the front, the new structure of the optimized air intake and discharge flow path structure and each component to maintain the low noise characteristics while increasing the air volume The purpose is to provide an indoor unit.

In order to achieve the above object, the present invention, the front frame and the air can be sucked to the front; A base frame having discharge holes formed on side surfaces and a bottom surface and having a motor seat for driving a fan, and coupled to the front frame; A guide frame provided between the front frame and the base frame to guide air flow; A heat exchanger provided between the front frame and the guide frame; Including; front panel spaced apart in front of the front frame;

In the center of the base frame there is provided an indoor unit for the air conditioner, characterized in that the motor seating portion is formed by an annular bead protruding toward the front side of the indoor unit.

On the other hand, according to another aspect (second aspect) of the present invention for achieving the above object, the front frame and the air suction to the front; A base frame having discharge holes formed at side surfaces and a bottom surface thereof, and two turbofan driving motor seating portions formed at the inside of the front surface, and coupled to the front frame; A guide frame provided between the front frame and the base frame to guide air flow; A heat exchanger provided between the front frame and the guide frame; Including; front panel spaced apart in front of the front frame;

An indoor unit for an air conditioner is provided at the center of the base frame, wherein a plurality of motor seats are formed by an annular bead projecting toward the front side of the indoor unit.

On the other hand, according to another aspect (third aspect) of the present invention for achieving the above object, the front frame and the air suction to the front; A base frame having a discharge port formed at a side surface thereof, and two blower fan driving motor seats formed at an inner side of an upper side and a lower side thereof, and coupled to the front frame; A heat exchanger installed behind the front frame; Cross flow fans respectively installed at the rear left and right sides of the heat exchanger; Including a front panel spaced apart in front to cover the air intake surface of the front frame,

An indoor unit for an air conditioner is provided at the center of the base frame, wherein a plurality of motor seats are formed by an annular bead projecting toward the front side of the indoor unit.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 26.

First, a first embodiment of the indoor unit of the present invention will be described with reference to FIGS. 1 to 17.

1 is an external perspective view of an indoor unit according to the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a cross-sectional view of the indoor unit according to the present invention, taken along the line I-I of FIG. 1.

And, Figure 4 is a cross-sectional view showing the edge structure of the front panel constituting the indoor unit of the present invention, Figure 5 is a perspective view showing a separate front frame constituting the indoor unit of the present invention, the filter is shown with only a portion installed.

And, Figure 6 is a perspective view showing a guide frame constituting the indoor unit of the present invention, Figure 7 is a front view of Figure 6, Figure 8 is a cross-sectional view along the line II-II of Figure 6, Figure 9 is a turbofan diameter and orifice This graph shows the noise characteristics according to the ratio with the radius.

10 is a perspective view showing one embodiment of a turbo fan constituting the indoor unit of the present invention, FIG. 11 is a perspective view showing another embodiment of a turbo fan constituting the indoor unit of the present invention, and FIG. 12 is a turbo fan applied to the present invention. It is a graph comparing the noise characteristics with the existing fan, Figure 13 is a plan view of FIG.

14 is a perspective view showing a motor mount base frame constituting the indoor unit of the present invention, and FIG. 15 is a rear perspective view of FIG. 14.

16 is a plan view for explaining an electrostatic precipitator installation position of the indoor unit of the present invention, and FIG. 17 is a side view of FIG.

First, referring to Figures 1 to 3, the indoor unit 1 for the air conditioner of the present invention, the front frame 200 to allow the air suction to the front; A base frame 400 having discharge holes formed on side surfaces and a bottom surface, and having a blower fan driving motor seating portion 410 at the front center portion, the base frame 400 being coupled to the front frame 200; A guide frame 300 provided between the front frame 200 and the base frame 400 to guide air flow; A heat exchanger (500) provided between the front frame (200) and the guide frame (300); Turbo fan 600 for discharging the heat-exchanged air to the outside while passing through the heat exchanger (500); And a front panel 100 spaced apart from the front of the front frame 200.

At this time, referring to Figure 4, the front panel 100 is formed to have a predetermined thickness, but the edge portion where the air is sucked is formed thinner than the inner portion so as to reduce the resistance during suction, the front panel from a predetermined point (100) towards the end is formed to become thinner. That is, the edge portion of the front panel 100 is manufactured to have a predetermined inclination angle β.

And, the edge of the front panel 100 is treated as a chamfer (chamfer) (110) if necessary.

In addition, referring to FIG. 5, the front frame 200 has a lattice-shaped air intake 210 at the front center to enable air intake, and the front panel fixing boss 220 outside the air intake 210. ) Is provided.

Then, a filter 800 for filtering foreign matter is installed on the air inlet 210 of the front frame 200. The filter 800 is generally in the form of a mesh.

In addition, the upper suction part B of the front frame 200 has a curved shape to minimize flow resistance.

6 to 8, the guide frame 300 guides the orifice 310 for guiding the flow of air sucked into the turbofan 600 and the air flow discharged from the turbofan 600. And upper and lower scrolls 320a and 320b for determining the discharge direction.

Among the upper and lower scrolls, the upper scroll 320a forms a surface that surrounds the turbofan 600 and a surface where two curved surfaces are combined, and the cutoff point of the upper scroll 320a is a guide frame 300. When it is divided into quadrants, it is located in the first quadrant (upper left side), the diameter of the turbofan 600 is φ, and the position coordinate from the center of the turbofan 600 is defined as (x, y). , The position coordinates (x, y) are determined in a range satisfying 0.17 <x / φ <0.48, 0.54 <y / φ <0.68.

Meanwhile, referring to FIGS. 2 and 3, the guide frame 300 further includes a heat exchanger support 330 formed on the surface opposite the scroll, and the heat exchanger support includes an orifice 310 and a heat exchanger ( It keeps a gap with 500).

In addition, the separation distance (G) from the bottom point of the orifice 310 to the bottom surface of the heat exchanger 500 is the lowest noise when the distance corresponding to 9.5 ~ 10.5% of the diameter of the turbo fan, the turbo fan performance This is the maximum.

For example, when the diameter of the turbofan 600 is 300 mm, the separation distance G is most preferably 28.5 to 31.5 mm.

Meanwhile, referring to FIGS. 8 and 9, the radius R of the orifice 310 and the diameter φ of the turbofan 600 to determine an optimal orifice 310 shape for minimizing flow resistance. It is desirable that the ratio (R / φ) is 0.05 to 0.07 because the noise characteristics are optimized in this range and the performance of the turbofan is also optimized. In particular, when the ratio (R / φ) of the radius (R) of the orifice 310 and the diameter (φ) of the turbo fan 600 is 0.06, it is best in terms of noise characteristics and fan performance.

2 and 3, the guide frame 300 has a structure in which the edge portion that forms the guide surface for the discharged air is bent toward the front of the indoor unit compared to the other portions of the frame, the bent edge portion 340 is flat Take form.

Referring to FIGS. 2 and 3, particularly FIGS. 10 to 13, the turbo fans 600 and 600a face the shroud 610 having a suction port at the center thereof, while maintaining a predetermined distance from the shroud 610. A hub 630 having a main plate surface 620 positioned so as to be connected to the center of rotation of the motor, and a circumference of the hub 630 between the main plate surface 620 and the shroud 610 of the hub 630. It includes a plurality of blades (640, 640a) of a predetermined curvature installed to be connected along the direction.

In this case, the blades 640 and 640a of the turbofans 600 and 600a are formed such that the pitch between the tip and the tip forms an unequal pitch or an equal pitch. Although it is advantageous in terms of fan performance (static pressure against the same air volume) and noise, the equal pitch may be advantageous when considering fan balancing, so it is actually designed to be unequal or equal pitch considering the fan diameter, blade width and number of blades. do. For example, when the number of blades is 13 when the diameter φ of the turbofan is 300 mm and the width of the blade L (see FIG. 10) is 50 mm, the noise characteristics of the fan are best when the number of blades is equal. .

Regardless of the case of equal pitch and inequality pitch, the blades may always have a constant width of the blade regardless of the distance from the center of the turbofan to the tip (see FIG. 10). The width of the blade (ie, the axial length of the blade) may vary depending on the distance to (see FIG. 11). That is, as shown in FIG. 10, the width of the blade may be formed to always have the same dimension irrespective of the radial distance from the fan center, and after passing through the main plate surface as shown in FIG. Increasingly, the width may be made smaller.

In addition, the turbo fan 600 shown in FIG. 10 is advantageous in terms of securing air volume since the width of the blade 640 is the same regardless of the separation distance from the center of the fan, and thus the area of the blade is wide. Turbo fan 600a is the width of the blade 640a becomes narrower after passing through the abacus surface, but the main plate surface 620 is cut in the form of being cut off the flow between the blade plate 620 and the blade connected to the hub 630 It is advantageous in terms of suppressing vortex generation due to interference.

On the other hand, when the air discharge area of the indoor unit 1 is constant, the ratio φ / L of the blade width L to the diameter φ of the turbofan is 6.5 to 7.5 when the high air flow rate and the fixed pressure are achieved. It is most preferable in low noise characteristic.

In addition, in the case of the turbofan of FIG. 10, the radial length of the blade 640 is preferably formed such that the tip is positioned substantially the same as the edge of the shroud 610.

Meanwhile, referring to FIGS. 14 and 15, the blowing fan driving motor seating portion 410 formed at the center of the base frame 400 is formed by an annular bead portion 410a protruding toward the front of the indoor unit. The bead portion 410a makes it possible to secure the width of the blade stably and sufficiently.

And, referring to Figure 15, the motor seating portion 410 region of the back of the base frame 400 is characterized in that it is further provided with a rib (420) to reinforce the strength, and to escape the natural frequency of the motor.

On the other hand, the base frame 400 may be out of the natural frequency of the motor by changing the thickness, the base frame 400 according to the present invention has a thickness (t) of 4 ~ 8 so as to deviate from the natural frequency of the motor It is characterized in that formed in the range of mm.

Referring to FIG. 3, the edge portion 340 of the guide frame 300 has a flat shape, but the discharged air is discharged toward the front of the indoor unit at the inner bottom surface of the discharge port 430 of the edge of the base frame 400. A guide surface 440 having a predetermined curvature for guiding is provided.

Accordingly, in the indoor unit 1 of the present invention, even if there is no separate wind direction control device, the discharged air is discharged to the front of the indoor unit.

In addition, the louver (not shown) may be further installed on the discharge port 430 of the indoor unit 1 of the present invention by opening and closing by a sliding method by driving the step motor.

At this time, the opening angle of the louver is opened at an angle which does not act as a resistance to the air discharged forward by the guide of the discharge air guide surface 440 on the inner surface of the base frame 400.

Of course, the louver may also serve to guide the discharged air to the front of the indoor unit, but the indoor unit 1 of the present invention does not need the louver because the air is discharged to the front of the bet without a separate wind direction control device.

However, when the louver is installed, the inside of the indoor unit 1 is not operated when the indoor unit 1 is not operated, thereby preventing the inside of the product from being kept clean, and preventing the inflow of dust or foreign matter through the discharge port. It is preferable.

Meanwhile, referring to FIGS. 2 and 3, and FIGS. 16 and 17, the indoor unit 1 of the present invention further includes an electrostatic precipitator 700 on an air suction surface of the heat exchanger 500.

In this case, the electrostatic precipitator 700 is preferably installed to be eccentrically positioned from the center of the turbo fan 600.

More specifically, referring to FIGS. 16 and 17, the electrostatic precipitator 700 includes an eccentric distance l from the center of the turbo fan 600 and a distance from an upper surface of the turbo fan 600 to the center of the electrostatic precipitator 700. It is preferable that it is provided in the position where ratio (l / h) with height h becomes 5-6. That is, the performance of the electrostatic precipitator 700 at this position is the same, and the noise is minimal.

The electrostatic precipitator 700 is generally fixed using a fin of the heat exchanger 500. That is, the fixing piece (not shown) provided in the electrostatic precipitator 700 is press-fitted between the fin and the fin of the heat exchanger 500 to be fixed.

Meanwhile, as the electrostatic precipitator 700 is applied with a high voltage, a photocatalyst plasma electrostatic precipitator is preferably installed to serve to remove and deodorize fine dust in the air. However, a general electrostatic precipitator may also be installed in order to remove only fine dust. Of course it is possible.

In other words, dust is collected when the general electrostatic precipitator is installed, but the odor problem cannot be solved, so an activated carbon filter may be separately installed.

On the other hand, the photocatalyst plasma electrostatic precipitator includes an ionizing unit for ionizing dust in the air and irradiating light energy, a collecting unit for collecting dust ionized from the ionizing unit, and collecting by the light energy irradiated from the ionizing unit. And a photocatalyst filter for decomposing the odor particles, and a high voltage generator for applying a high voltage to the dust collecting filter.

The operation process and action of the indoor unit 1 of the present invention configured as described above are as follows.

First, when the indoor unit 1 is driven, the indoor air is sucked through the space between the front panel 100 and the front frame 200 by the suction force by the rotation of the turbo fan 600.

That is, the indoor air flows into the air inlet 210 of the front of the front frame 200 through the top, bottom, left and right four directions of the front panel 100.

Subsequently, foreign matters are filtered while passing through the filter 800 installed at the open air inlet 210 of the front frame 200, and the indoor air filtered with the foreign matter passes through the heat exchanger 500, and the guide frame is heat-exchanged. Guided by the orifice 310 of 300 is sucked into the turbo fan 600.

In this process, some of the indoor air passes through the electrostatic precipitator 700, and when the photocatalyst plasma electrostatic precipitator is employed, fine dust is collected and filtered by the action of the electrostatic precipitator, and the smell is also deodorized.

On the other hand, the air sucked into the turbo fan 600 through the electrostatic precipitator 700 is discharged in the fan centrifugal direction, at this time is discharged divided into left and right and lower directions by the guide action of the upper and lower scrolls (320a, 320b). .

Then, the discharged air is discharged toward the front of the indoor unit by the guide action by the guide surface 440 of the base frame 400 and the straight surface of the guide frame 300.

The function and action of each part in the indoor unit 1 of the present invention operated as described above are as follows.

First, the front panel 100 is basically attached to the front of the indoor unit (1) of the present invention to cover the air inlet 210, the filter 800 is installed serves to improve the aesthetics of the indoor unit (1). .

Here, in order to further enhance or enhance the aesthetics of the indoor unit 1, a finish may be attached to the front panel 100, or various types of patterns may be added.

In addition, one side of the front panel 100 may be provided separately or integrally with a display unit (not shown) showing whether the indoor unit 1 operates and / or an operating state or a function manipulation state.

In addition, the edge portion of the front panel 100, as shown in Figure 4, the inner side of the edge is cut so that the thickness becomes narrower toward the end to widen the suction area between the front panel 100 and the front frame 200 It will play a role.

That is, by increasing the suction area for the air flowing into the front and rear and front and bottom of the front panel 100 can increase the air volume.

Next, the front frame 200 is a curved surface having an upper suction portion with a predetermined curvature to minimize the flow resistance of the suction air, which is the upper suction unit is installed on the wall surface of the indoor unit (1) If the position is high, it is not easy to see.

That is, if the distance between the front panel 100 and the front frame 200 is too wide, there is a disadvantage in that the air intake side is advantageous, but the user can easily look inside the indoor unit 1 through the gap. In the upper side of the front frame 200, such a concern is relatively small.

On the other hand, if the flow resistance of the intake air should be considered more, or if the installation position on the wall surface of the indoor unit (1) may be low, it is possible to be curved on the lower suction part as well as the upper suction part of the front frame 200. Of course.

Next, the filter 800 installed on the air inlet 210 of the front frame 200 is a mesh-type filter to filter out large dust and foreign substances in the air to be sucked.

Next, the orifice 310 of the guide frame 300 effectively guides the air sucked into the turbofan 600 to contribute to the low noise of the indoor unit 1, and to maximize the performance of the turbofan 600 Will act as a raise.

In addition, the scroll of the guide frame 300 determines the discharge direction of the air discharged from the turbo fan 600 and serves to equalize the flow distribution of the discharged air as much as possible, similar to the orifice 310. By effectively guiding the low noise of the indoor unit (1), it serves to maximize the performance of the turbofan.

In addition, the heat exchange support part 330 protruding to have a predetermined height on the surface opposite to the scroll of the guide frame 300 maintains an interval between the orifice 310 and the heat exchanger 500, thereby inducing the exchange of the intake air with the heat exchanger 500. It serves to ensure that the heat exchange area is normally secured.

That is, if the heat exchanger 500 and the orifice 310 abut because there is no heat exchange support 330, the space in which air is sucked is significantly reduced, making it difficult to secure a normal heat exchange area. However, the front-rear dimension (product depth) of the product is increased by the height of the protrusion of the heat exchange support 330, so it must be designed to an appropriate height in consideration of this.

In addition, the radius R of the orifice 310 of the guide frame 300 and the diameter φ of the turbofan are designed such that the ratio R / φ is optimized for noise characteristics.

In addition, the edge portion 340 of the guide frame 300 is bent to the front side of the indoor unit (1) compared to the other portion of the frame by taking a flat shape, thereby improving the flow resistance of the discharged air has the effect of lowering the noise. In addition, the discharged air is prevented from being sucked back through the gap between the front panel 100 and the front frame 200.

That is, as shown in FIG. 3, when the edge portion 340 of the guide frame 300 is flat, the flow path resistance is lowered as well as the ventilation is lower than when the edge portion of the guide frame 300 is curved. The phenomenon can be reduced.

Next, since the turbo fan 600 tends to concentrate the pressure and air flow characteristics of the blades at the end of the fan, there is an effect of improving the static pressure characteristics and the noise characteristics by increasing the tip area of the blade.

That is, in general, as the blade width of the turbo fan is wide, the area of the blade is increased, the pressure component is increased, which means that the pressure component is to increase the air flow while overcoming the flow resistance.

If the turbo fan 600a of FIG. 11 employs a blade having a narrow structure in which the width of the main plate surface 620 is narrowed toward the blade tip, the turbo having the same width is applied to the tip of the tip portion shown in FIG. 10. Since the static pressure characteristic is lower than the fan 600, it means that the fan should be turned more in order to produce the same amount of air. In the turbo fan, since the rotational speed (rpm) is the main noise source, the noise is increased relatively.

Accordingly, when the turbo fan 600 having a wider blade width and longer length is applied as shown in FIG. 10, the noise due to the rotational speed is reduced because a sufficient airflow is secured even if the rotational speed is lowered.

Meanwhile, in the case of the turbo fan 600a employing the blade illustrated in FIG. 11, flow interference between the main plate surface 620 integrated with the hub 630 and the blade tip is reduced, so that the vortices generated in the blade tip portion are generated. This also reduces the turbofan noise due to eddy currents.

That is, the turbo fan shown in Figure 11 is advantageous in terms of noise due to vortex, but when the rotational speed is increased to overcome the disadvantages in terms of air volume, there is a disadvantage that the motor noise increases according to the rotational speed, FIG. The turbo fan shown in FIG. 10 is relatively disadvantageous in comparison with the turbo fan of FIG. 11 in terms of noise due to vortex, but can be expected to reduce the motor noise by reducing the rotational speed due to the advantage in securing air volume. As shown in the graph of 12, the turbofan of FIG. 10 was found to have a better noise reduction effect. Although the turbofan of FIG. 10 has better noise characteristics than the turbofan of FIG. 11, the turbofan of FIG. 11 also shows a sufficiently good noise characteristic, so that it is of course applicable to the indoor unit 1 of the present invention.

Next, the base frame 400 has a motor seating portion 410 is formed by the annular bead portion 410a protruding toward the front of the indoor unit in the center, the motor (M) is seated on the motor seating portion 410 do.

And, the rib formed in the motor seating portion 410 area of the back of the base frame 400, while reinforcing the strength of the base frame 400, the vibration characteristics of the base frame 400 by the shape change is inherent to the motor It should be out of the frequency so as not to cause resonance when driving the motor.

In addition, the annular bead portion 410a formed in the base frame 400 serves to maintain the blade width of the turbofan while maintaining the strength of the reinforcement and resonant avoidance when driving the motor as described above. .

That is, as shown in FIG. 3, the main plate surface 620 of the turbofan is positioned below the highest protruding point of the bead portion 410a while enclosing the bead portion 410a of the base frame 400. This ensures that the width of the blade is wide enough.

On the other hand, the base frame 400 by changing the thickness (t) eventually changes the mass, thereby also the vibration characteristics of the base frame 400 does not cause resonance beyond the natural frequency of the motor.

Next, the electrostatic precipitator 700 provided on the air suction surface of the heat exchanger 500 serves to remove fine dust in the intake air before passing through the heat exchanger 500.

In addition, the electrostatic precipitator 700 is installed to be eccentrically positioned from the center of the turbofan, and thus exhibits sufficient dust collection performance without acting as a resistance to intake air.

On the other hand, the front panel 100 may be maintained in a fixed type in consideration of a defective occurrence rate, etc., but is closed before driving and the panel is inclined because the top or bottom is widened during operation, or the front panel 100 is entirely It would also be desirable to employ a variable suction area structure that allows the suction area to be broadened in the future.

Hereinafter, a case in which two turbo fans 600 are applied to an indoor unit will be described.

Basically, after the indoor air is sucked through the front surface and discharged toward the indoor unit through the heat exchanger 500 and the turbo fan 600, the same as in the above-described embodiment, but two turbo fans 600 are installed instead of one. There is a difference in that it is accompanied by a structural change of the relevant portion accordingly.

In general, when visualizing the flow shape of the discharge part of the indoor unit to which one turbo fan is applied as described above, it is understood that the flow shape of the air discharged to the left and right and the bottom is not uniformly distributed due to the characteristics of the fan rotating in one direction. (See FIG. 18).

Accordingly, in the embodiments described below, it is possible to apply two fans to make the flow characteristics of the discharged air even more uniform, and furthermore, by controlling the rotation speed of the two fans differently, left, right, left, and An object of the present invention is to provide an indoor unit capable of varying a flow rate discharged downward.

First, referring to FIGS. 19 to 21, an indoor unit structure in which two turbo fans 600 are applied as a blowing fan will be described.

Prior to the description of this embodiment, it is assumed that the same components and the same reference numerals are assigned to the same components as in the above-described embodiment, and the illustration may be omitted.

The indoor unit of the present embodiment includes: a front frame 200 (see FIG. 2) to allow air intake to the front; Discharge openings are formed on the side and bottom, and two turbofan driving motor seats 410 (see FIG. 14) are formed inside the front surface, and the base frame 400 (see FIG. 2) is coupled to the front frame 200. and; A guide frame 300 (see FIGS. 2 and 6) provided between the front frame 200 and the base frame 400 to guide air flow; A heat exchanger (500) provided between the front frame (200) and the guide frame (300); And a front panel 100 (refer to FIG. 2) spaced apart from the front of the front frame 200.

Referring to FIG. 19, a characteristic configuration of the present embodiment includes two turbo fans 600 installed at upper and lower portions, respectively, separating two turbo fans between two turbo fans and guiding the flow of discharged air. The middle scroll 320c is provided, and the upper scroll 320a is provided at the top of the upper turbofan.

In addition, an orifice 310 for guiding the flow of air sucked into each turbo fan is formed in the guide frame 300 so as to correspond to each turbo fan.

The turbo fan is installed to rotate in different directions.

In this configuration, the air discharge direction is basically separated left and right, but since the upper space and the lower space are separated by the middle scroll, the discharge direction becomes four directions eventually.

In this case, the discharge flow distribution shows a more uniform flow distribution than when only one turbo fan is installed.

On the other hand, unlike the above, the lower scroll 320b for inducing the discharge to the lower portion below the lower turbo fan may be further provided, in this case, since the air is discharged also in the downward direction, the entire discharge direction is 5 directions. In this case, too, the discharge flow distribution is more uniform.

Referring to FIG. 20, the middle scroll 320d of another structure is illustrated, and even in this case, the discharge flow distribution is more uniform than in the case of using one fan.

Referring to FIG. 21, there is shown a middle scroll 320e installed to tilt in the opposite direction to FIG. 19.

Meanwhile, the turbo fans installed in the upper and lower parts in FIGS. 19 to 21 may be installed to rotate in the same direction.

In addition, as can be seen through the bar shown in Figures 19 to 21, the rotation center of the turbo fan respectively installed in the upper and lower portions may be of course not necessarily located on the same vertical line.

In particular, when the indoor unit having the two turbo fans described above is installed at one end of the wall surface, it is possible to efficiently improve the air flow through the discharge flow rate control on the left and right sides of the product.

In other words, when the indoor unit is installed at one end rather than at the center of the indoor wall, the air discharged toward the neighboring wall collides with the neighboring wall to change the flow direction. In this case, the air flow may be deteriorated from the consumer's point of view. In the present embodiment in which two fans are applied, a desired air flow may be obtained by changing the flow rates of the left and right sides of the product through the rotational speed control for one fan.

In addition, the discharge flow rate is determined according to the scroll shape or the rotation direction of the turbo fan, and in consideration of the indoor unit installation position, the discharge flow rate of the left or right side can be varied to obtain a desired air flow feeling by controlling either of the two fans. will be.

Next, with reference to FIGS. 23 to 26, two blower fans are applied, and the indoor unit structure to which the cross flow fan 900 is applied as the blower fan will be described.

In the indoor unit according to the present embodiment, as in the case of basically using the two turbo fans described above, the distribution of the discharge flow rates on the left and right sides of the indoor unit can be uniformized, and the desired air flow is varied by varying the discharge flow rates on the left and right sides in consideration of the indoor unit installation position. The same effect can be obtained in that sense can be obtained.

First, FIG. 22 is a perspective view showing an indoor unit to which two cross flow fans 900 are applied, and the indoor unit of the present embodiment includes: a front frame 200 capable of sucking air to the front; A base frame 400 having a discharge port formed at a side surface thereof, and a motor seating portion for driving a cross flow fan which is a blower fan at an inner side of the upper and lower sides thereof, and coupled to the front frame 200; A heat exchanger (500) installed at the rear of the front frame (200); Cross flow fans 900 respectively installed at the rear left and right sides of the heat exchanger 500; And a front panel 100 spaced apart in front of the front frame 200 so as to cover the air suction surface of the front frame 200.

In addition, the front panel 100 is basically installed to maintain the same interval with respect to the air suction surface of the front frame 200 in the up and down and left and right sides.

Meanwhile, FIGS. 23 to 26 are cross-sectional views illustrating various modified examples of the indoor unit of the present invention to which two cross flow fans 900 are applied, and the basic structure is the same as that shown in FIG. 22, except that the front panel is installed. The structure, the diameter of the fan, and the shape of the heat exchanger 500 are different.

That is, the indoor unit illustrated in FIG. 23 is a state in which the front panel 100 is opened to have a predetermined inclination angle θ with respect to the air intake surface of the front frame 200, and the front panel 100 is in front of the front frame ( Close to the air suction surface of the 200 to block the air intake, it is characterized in that it is installed to open with a predetermined inclination angle by the drive of a separate drive unit (not shown).

In addition, the indoor unit illustrated in FIG. 24 is characterized in that the front panel 100 is installed in a cantilever shape on one side of the front frame 200, and the front panel 100 is in close contact with the air suction surface of the front frame 200. While being driven by a separate driving unit (not shown), the air suction surface is spaced apart from the air suction surface by the same distance.

23 and 24, the indoor unit is characterized in that the shape of the heat exchanger 500 is straight in cross section.

The indoor unit illustrated in FIG. 25 is characterized in that the front panel 100 is in close contact with the air suction surface of the front frame 200 and is spaced apart from the air suction surface by driving of a separate driving unit (not shown). As the heat exchanger 500 is straight, the thickness of each of the edge portions corresponding to each cross flow fan 900 is thinner than that of the center portion. That is, the heat exchanger 500 has a double row of pipes through which the refrigerant flows, and the pipes through which the coolant flows are arranged in one row.

In addition, the indoor unit illustrated in FIG. 26 has the front panel 100 spaced apart from the air suction surface of the front frame 200 by a predetermined driving unit (not shown) from the air suction surface. Further away from each other.

And, the heat exchanger 500 is characterized in that the V-shape as a whole in the cross section.

Meanwhile, as illustrated in FIGS. 25 and 26, the thicknesses of both edge portions corresponding to the cross flow fans 900 of the heat exchanger 500 may be thinner than those of the center portion.

When the indoor unit according to the embodiments of the present invention described above is installed on the wall, it is preferable to be installed in the vertical. Of course, the indoor unit according to each embodiment may be installed in a horizontal type, the installation direction may be free, such as being installed inclined, but in consideration of the position and the wind direction of the discharge port, it is preferable that the indoor unit is installed vertically. .

The present invention is not limited to the above embodiments, and various changes and modifications can be made to those skilled in the art without departing from the scope of the technical spirit inherent in the present invention.

The present invention described above has various effects as follows.

First, as an indoor unit for discharging the heat-exchanged air to the front through the side after the front suction, it is possible to provide an indoor unit of an optimized structure that can reduce noise while increasing the suction and discharge air volume.

That is, the present invention can provide an indoor unit having a new structure in which the absorption and discharge flow path structure and each part are optimized to maintain the low noise characteristics while increasing the air volume.

Specifically, in comparison with the existing indoor unit, even if the indoor unit is installed in close contact with the wall, the intake air inflow amount is secured.

In addition, unlike the existing indoor unit in which the turbofan driving motor is installed on the front frame, the front panel portion considering much of the visual part of the consumer does not tremble while driving the motor and noise is also reduced.

And, since the filter is installed in front of the device, it is easy to attach and detach when cleaning the filter to provide a user convenience.

Claims (6)

A front frame configured to allow air intake to the front; A base frame having discharge holes formed on side surfaces and a bottom surface and having a motor seat for driving a fan, and coupled to the front frame; A guide frame provided between the front frame and the base frame to guide air flow; A heat exchanger provided between the front frame and the guide frame; Including; front panel spaced apart in front of the front frame; Indoor unit for the air conditioner, characterized in that the motor seating portion is formed by the annular bead portion protruding toward the front side of the indoor unit in the center of the base frame. The method of claim 1, In the motor seating area on the back of the base frame, The indoor unit for an air conditioner, characterized in that the reinforcement is further provided with a rib that serves to escape the natural frequency of the motor. The method of claim 1, The base frame is an indoor unit for an air conditioner, characterized in that the thickness (t) out of the natural frequency of the motor. The method of claim 1, The base frame is an indoor unit for an air conditioner, characterized in that the thickness (t) outside the natural frequency of the motor is 4 ~ 8mm. A front frame configured to allow air intake to the front; A base frame having discharge holes formed at side surfaces and a bottom surface thereof, and two turbofan driving motor seating portions formed at the inside of the front surface, and coupled to the front frame; A guide frame provided between the front frame and the base frame to guide air flow; A heat exchanger provided between the front frame and the guide frame; Including; front panel spaced apart in front of the front frame; Indoor unit for the air conditioner, characterized in that the motor seat portion is formed by a plurality of annular bead portion protruding toward the front of the indoor unit in the center of the base frame. Front frame to allow air intake to the front, A discharge frame is formed at a side surface, and two blower fan driving motor seats are formed inside the upper and lower surfaces, and the base frame is coupled to the front frame; A heat exchanger installed behind the front frame; Cross flow fans respectively installed at the rear left and right sides of the heat exchanger; Including a front panel spaced apart in front to cover the air intake surface of the front frame, Indoor unit for the air conditioner, characterized in that the motor seat portion is formed by a plurality of annular bead portion protruding toward the front of the indoor unit in the center of the base frame.

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