KR20070019282A - Discharge grille assembly of Indoor unit for air conditioner - Google Patents

Abstract

The present invention relates to a discharge grill assembly of an indoor unit of an air conditioner, which is formed in a rectangular net shape and is mounted such that a safety net for restricting foreign material inflow into the indoor unit is constrained on one side of the discharge grill.

An air conditioner indoor unit according to the present invention which forms a part of the exterior of the indoor unit 100 and is mounted on one side of the main chassis 120 in which parts are embedded therein and guides the discharge direction of air inside the indoor unit 100 to the room. The discharge grill assembly 200 of the (100), a plurality of discharge holes 222 are formed in the perforated discharge grill 220 to discharge the air in the indoor unit 100 to the room; Is formed in a square wire mesh shape is fixedly mounted on one side of the discharge grill 220, and has a configuration including a safety net 240 for restricting foreign matter from entering the indoor unit 100 through the discharge port 222, One side of the discharge grill 220 is characterized in that the release restriction (220 ') is formed to restrain the four sides of the safety net 240 to restrain the safety net 240. According to such a configuration there is an advantage that the safety force of the safety net is improved to prevent accidents in advance.

Air Conditioner, Frame Type, Indoor Unit, Discharge Grill, Safety Net

Description

Discharge grille assembly of Indoor unit for air conditioner}

1 is a perspective view showing an appearance configuration of a conventional indoor air conditioner indoor unit.

Figure 2 is an exploded perspective view showing a disassembled grill assembly of the air conditioner indoor unit in the prior art.

Figure 3 is a perspective view showing the external configuration of the air conditioner indoor unit employing a preferred embodiment of the present invention.

Figure 4 is an exploded perspective view showing the internal configuration of the indoor unit of the air conditioner employing a preferred embodiment of the present invention.

Figure 5 is an exploded perspective view showing the configuration of the discharge grill assembly of the indoor unit of the air conditioner according to the present invention.

Figure 6 is a cross-sectional view showing a state in which the safety net which is a main component of the air conditioner indoor unit discharge grill assembly according to the present invention is coupled to the discharge grill.

Explanation of symbols on the main parts of the drawings

100. Indoor unit 110. Front grill

120. Main chassis 122. Opening

130. Air filter 140. Gear assembly

142. Grill Motor 144. Motor Receptacle

146. Gear 150. Heat Exchanger

160.Top Cover 170.Drain Pan

172. Collecting space 174. Drain pipe

180.Turbo Fan 182.Blade

184. Through hole 186. Motor housing

188. Fan motor 188 '. Motor shaft

190. Air guide 200. Discharge grill assembly

220. Discharge grill 220 '. Deregulation Zone

222. Outlet port 224. Tightening groove

226. Fasteners 228. Interference ribs

240. Safety net 242. Hook

244. Insertion protrusion 260. Louver

280. Louver Motor

The present invention relates to an indoor unit of an air conditioner, and more particularly, the discharge of the air conditioner indoor unit is formed in a rectangular net shape is installed so that the safety net to restrict the inflow of foreign matter into the indoor unit is fitted on all sides in the discharge grill It is about the grill assembly.

In general, an air conditioner is installed to heat a room with a heater, an air conditioner, a purifier, or to purify the air. The air conditioner is installed to create a more comfortable indoor environment for the user. In order to minimize the thickness of the indoor unit by embedding a turbo fan, a frame type air conditioner has been developed.

Hereinafter, the configuration of the frame type air conditioner (hereinafter referred to as an air conditioner) will be described with reference to the accompanying drawings. Figure 1 is a perspective view showing the external configuration of the air conditioner indoor unit according to the prior art.

As shown in the figure, the indoor unit 1 of a general air conditioner includes a front grill 10 that forms part of the front exterior, and a main chassis 20 in which a plurality of parts are built therein by forming a space in the front. Most of the appearance is formed by this.

In addition, the indoor unit 1 is sucked into the indoor air to the left and right and the lower side of the front and the air heat exchanged to the left and right and downward. That is, the front panel 12 having a square plate shape is mounted at the center of the front grill 10. The front panel 12 is mounted so that the rear surface is spaced apart from the front grill 10 and is configured to be rotatable based on the upper end.

Accordingly, the indoor air may flow into the indoor unit 1 through the spaced gap between the front panel 12 and the front grill 10, that is, the suction port (not shown).

An air filter 30 is mounted on the rear side of the front panel 12. The air filter 30 is for filtering indoor air introduced into the indoor unit 1 through a suction port (not shown). That is, a fine vent hole (not shown) is formed on the entire surface of the air filter 30 to selectively filter only foreign matter from the air including foreign matter.

Therefore, only the air purified by the air filter 30 can be introduced into the indoor unit 1, more specifically, to the rear of the air filter 30.

Although not shown, the rear side of the air filter 30 is provided with a turbo fan connected to the fan motor to force the air flow, and a heat exchanger for heat-exchanging the air forced by the turbo fan.

The turbo fan (not shown) receives rotational power from a fan motor (not shown) that rotates at a high speed when power is applied and generates wind in the rear. Therefore, the turbo fan is forced to flow the air from the front to the rear by the rotational power, the indoor air is forced to suck into the indoor unit (1) through the inlet (not shown).

In addition, a heat exchanger (not shown) is installed at the rear side of the turbo fan to exchange heat of the indoor air by using a refrigerant flowing through a phase change to heat exchange the indoor air sucked into the indoor unit 1.

The discharge grill assembly 40 is provided on the left and right and lower sides of the main chassis 20. The discharge grill assembly 40 serves to guide the indoor air heat-exchanged by the heat exchanger to be discharged back into the room, and is formed by cutting the rectangular shape at the left and right and lower ends of the main chassis 20. 22 and corresponding sizes.

Hereinafter, the configuration of the discharge grill assembly 40 will be described with reference to the accompanying drawings. 2 is an exploded perspective view showing an exploded view of the discharge grill assembly of the indoor unit of the air conditioner according to the prior art.

As shown in the figure, the discharge grill assembly 40 has a plurality of discharge holes (42 ') formed in the perforated discharge grill 42 for guiding the air inside the indoor unit (1) to be discharged into the room And, the discharge grill 42 is configured to include a round louver 45 of the round plate shape.

The discharge grill 42 is formed such that the right side thereof has a curvature corresponding to the louver 45, and the above-described discharge port 42 ′ is formed at the left side in the longitudinal direction. The discharge port 42 ′ allows the room and the inside of the indoor unit 1 to communicate with each other so that the air forced by the turbofan (not shown) can be discharged to the room.

The louver 45 is configured to be rotatable by forcing the flow direction of air discharged into the room through the discharge port 42 '. That is, the louver 45 is connected to the louver motor 47 which is mounted at the lower end of the discharge grill 42 and generates rotational power, thereby allowing repeated rotation within a predetermined angle.

Therefore, when power is applied to the louver motor 47 to rotate, the louver 45 is interlocked, and the air discharged through the discharge port 42 'causes the contact angle of the louver 45 to change at a time. Thus, air conditioning is possible to the corner of the room.

However, the air conditioner according to the prior art as described above has the following problems.

That is, the discharge port 42 ′ formed in the discharge grill 42 is formed so that the inside and the outside of the air conditioner 1 communicate with each other, and the discharge port 42 ′ has a foreign material inside the air conditioner 1. No configuration is installed to allow insertion to be blocked.

Therefore, when the foreign matter is inserted into the air conditioner 1 through the discharge port 42 ', the turbo fan and the heat exchanger are damaged.

In addition, if the turbo fan and the heat exchanger is damaged, there is a problem in that additional repair costs are generated.

In addition, it is not preferable because the above reason causes the customer to decrease the satisfaction with the product.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, by providing a safety net on one side of the discharge grill to provide a discharge grill assembly of the indoor unit of the air conditioner to block the inflow of foreign matter into the indoor unit. have.

Still another object of the present invention is to provide a discharge grill assembly of an indoor unit of an air conditioner, which is configured such that a safety net restricting foreign material inflow is supported on four sides by a discharge grill to prevent the safety net from being separated.

According to a feature of the present invention for achieving the above object, the present invention forms a part of the exterior of the indoor unit and a plurality of mounted on one side of the main chassis in which the parts are built, thereby guiding the discharge direction of air in the indoor unit to the room The discharge grill assembly of the indoor unit of the air conditioner includes: a discharge grill for discharging air inside the indoor unit by forming a plurality of discharge holes perforated therein; It is formed in a rectangular wire mesh shape is fixedly mounted on one side of the discharge grill, characterized in that it comprises a safety net for regulating foreign matters to enter the indoor unit through the discharge port.

One side of the discharge grill is characterized in that the restraint regulation sphere for restraining the departure of the safety net by restraining the four edges of the safety net.

The disengagement control mechanism includes a locking groove recessed and formed to be engaged with one side of the safety net, a fastening molded fastening hole receiving one side of the safety net therein, and an interference rib protruding to interfere with one side of the safety net. It is characterized by.

The edge of the safety net, protruding outwardly formed is characterized in that the engaging ring is engaged with the coupling groove, the insertion projection is inserted into the coupling hole is formed.

The insertion protrusion is characterized in that interference by the interference rib is restricted in one direction movement.

The fastening hole and the fastening groove is characterized in that formed in a plurality.

According to the present invention having such a configuration, there is an advantage that the safety net is more firmly mounted on the discharge grill, and the safety accident is prevented in advance because the departure is restricted.

Hereinafter, the configuration of the air conditioner to which the discharge grill assembly of the indoor unit of the air conditioner according to the present invention is applied will be described with reference to the accompanying drawings.

Figure 3 is a perspective view showing the appearance configuration of the air conditioner indoor unit employing a preferred embodiment of the present invention.

As shown in the figure, the indoor unit 100 of the air conditioner has a front grill 110 to form a front rim appearance, and the front is recessed to the rear to form the main chassis 120 having a plurality of parts therein. Most of the appearance is formed by this.

The front panel 112 of the front grill 110 is installed so that the square plate-shaped front panel 112 is spaced apart to constitute most of the front of the indoor unit (100). In addition, the front panel 112 may be rotated based on the upper end, and the gap spaced apart from the front grill 110 may form an intake port (not shown) to allow indoor air to be sucked into the indoor unit 100. Do it.

The main chassis 120 is coupled to the rear side of the front grill 110. The main chassis 120 is combined with the front grill 110 to form a space in front so that a plurality of components can be mounted.

In addition, openings 122 cut and formed in a rectangular shape are formed at left and right ends and bottom ends of the main chassis 120. The opening 122 guides the air sucked into the indoor unit 100 through the front panel 112 to be discharged back to the room, and can be selectively shielded by the discharge grill assembly 200 to be described below. It is configured to.

Hereinafter, an internal configuration of the indoor unit 100 will be described in detail with reference to the accompanying drawings.

4 is an exploded perspective view showing the internal configuration of the air conditioner indoor unit 100 employing a preferred embodiment of the present invention.

As shown in the figure, an air filter 130 is provided at the rear side of the front panel 112, more specifically, at the front center portion of the front grill 110. The air filter 130 is for filtering the indoor air passing through the front panel 112, the fine air vents (not shown) is formed on the front of the air filter 130 to select only foreign matter in the air including foreign matter Filtered out.

Therefore, the air passing through the front panel 112 and the air filter 130 is not in the state of foreign matter is contained in the indoor unit 100 is prevented from loading foreign matter.

The rear of the front grill 110, the gear assembly 140 is mounted. The gear assembly 140 is configured to force the rotation of the front panel 112. That is, the gear assembly 140 has a grill motor 142 that transmits rotational power when power is applied, and the number of motors fixed to the rear side of the front grill 110 in a state of accommodating the grill motor 142 therein. The tool 144 and the grill motor 142 is interlocked with the fan-shaped gear 146 formed on the outer peripheral surface is configured to include.

Therefore, when the grill motor 142 is rotated inside the motor receiving tool 144 by receiving power, the gear 146 also rotates to interfere with one side of the rear side of the front panel 112 so that the front panel 112 is rotated. ) Can be forced to rotate.

The rear side of the front grill 110 is provided with a heat exchanger 150 for heat-exchanging the air introduced into the indoor unit (100). The heat exchanger 150 has a rectangular parallelepiped shape having a thin thickness and is mounted so that the left and right ends thereof are positioned at the left and right sides of the indoor unit 100.

In more detail, the center portion is fastened to the top cover 160 having a rectangular plate-shaped hole, and the top cover 160 is screwed to one side of the front surface of the main chassis 120 as described above. The flow is regulated inside the indoor unit 100.

Therefore, the air sucked into the indoor unit 100 through the front panel 112 has a large contact area and passes through the heat exchanger 150, thereby making efficient heat exchange.

The top cover 160 described above is configured to guide the air heat-exchanged by the heat exchanger 150 to flow rearward through the punctured central portion.

The lower side of the heat exchanger 150 is provided with a drain pan 170 in which an upper portion is opened to form a collecting space 172. The drain pan 170 is for collecting heat condensate generated by the temperature difference between the refrigerant when the heat exchanger 150 heats the indoor air, and the condensate flows downward along the outer surface of the heat exchanger 150. This condensate is collected in the collecting space 172.

In addition, the rear right side of the drain pan 170 is provided with a drain pipe 174 having a circular tube shape and protruding backward. The drain pipe 174 is configured to communicate with the collection space 172 so that the condensed water collected in the collection space 172 may be discharged to the outside of the indoor unit 100.

The rear side of the top cover 160 is provided with a turbo fan 180 in the center portion is punched in more detail. The turbo fan 180 is formed in a disc shape having a front opening, and rotates at a high speed to force air flow inside the indoor unit 100.

That is, the turbo fan 180 is coupled to the motor shaft 188 'of the fan motor 188 that generates the rotational power when the power is applied in the state accommodated in the motor housing 186 to receive the rotational power. In this rotational power, the turbo fan 180 inhales the indoor air into the indoor unit 100 by generating a suction force in the front, and forces the flow direction in the circumferential direction.

Therefore, the outer peripheral surface of the turbo fan 180 is formed by cutting a plurality of blades 182 in contact with the air when the turbo fan 180 is rotated, formed by bending the blade 182 forward after cutting Air flows through the through hole 184 toward the outer circumferential surface of the turbofan 180.

On the other hand, the air guide 190 is formed on the front upper portion of the above-described main chassis 120 rounded downward. The air guide 190 is configured to guide the forced air flowing through the through hole 184 of the turbo fan 180 toward the opening 122.

That is, the air guide 190 is installed to be spaced apart vertically above the turbo fan 180, and flows upward in the air flowing in the outer circumferential direction of the turbo fan 180 through the through hole 184. The air is guided to the opening 122 by dispersing air from side to side.

Therefore, air flow is generated in the main chassis 120 to the left and right and the lower side, and is strongly discharged through the opening 122.

In addition, the opening 122 is formed in the left and right side surfaces and the lower surface central portion of the main chassis 120, and the discharge grill assembly 200 constituting the main part of the present invention is mounted in the opening 122.

The discharge grill assembly 200 is configured to shield the opening 122, and optionally rotates to open the indoor unit 100 to open the interior of the indoor unit 100, so that the discharge direction of the air discharged into the room is opened through the opening 122. Will be forced.

Hereinafter, the configuration of the discharge grill assembly 200 will be described in detail with reference to the accompanying drawings.

5 is an exploded perspective view showing the configuration of the discharge grill assembly of the air conditioner indoor unit according to the present invention, Figure 6 is a safety net which is the main configuration of the discharge grill assembly of the air conditioner indoor unit according to the present invention is coupled to the discharge grill A cross sectional view showing a state is shown.

As shown in these drawings, the discharge grill assembly 200 has a plurality of discharge holes 222 are formed perforated discharge grill 220 to discharge the air in the indoor unit 100 into the room, and square wire mesh shape It is formed to include a safety net 240 and the like to be installed in the discharge port 222 front surface to regulate the inflow of foreign matter into the indoor unit (100).

The discharge grill 220 is formed such that the rear side is convexly rounded rearward as shown in FIG. 5, and the discharge hole 222 is formed on the left side, and the longitudinal shape and size of the discharge grill 220 correspond to the opening 122. Therefore, the air passing through the opening 122 may be discharged only through the discharge part.

In addition, in front of the discharge port 222, a release restrictor 220 'is formed to allow the safety net 240 to be restricted from the discharge grill 220. The release regulator 220 ′ is configured to restrain four edges of the safety net 240.

That is, the release control tool 220 ′ is recessed and formed in the front center portion, and the fastening groove 224 restrains the right end of the safety net 240, and punched to restrain the upper and left sides of the safety net 240. The fastening hole 226 and the interference rib 228 formed in the shape of a square plate interfere with the lower end of the safety net 240 is configured to include.

The fastening groove 224 is cut into a substantially rectangular shape to restrain the right end of the safety net 240 in a locking manner. That is, the fastening groove 224 is coupled to the engaging hook 242 to be described below, it is preferable that the plurality is configured so that the binding force to the safety net 240 when combined with the engaging ring 242.

The fastening hole 226 is perforated in a circular shape on the left side and the upper side spaced apart from the discharge port 222. The fastening hole 226 is for constraining the upper side and the left side of the safety net 240 as described above, and is drilled to have an inner diameter corresponding to the outer diameter of the insertion protrusion 244 to be described below, and is provided in plurality. .

Therefore, when the insertion protrusion 244 is inserted into the fastening hole 226, the discharge grill 220 constrains the upper and left ends of the safety net 240 by three places, respectively, so that the safety net 240 is raised. Direction and leftward flow are regulated.

The interference rib 228 is protruded upward from a place forming the bottom surface of the discharge hole 222 formed at the lowermost side of the plurality of discharge holes 222, and shields a lower portion of the discharge hole 222 as shown in FIG. Done. Therefore, when the insertion protrusion 244 described below is in contact with the right surface of the interference rib 228 and interferes with the lower end of the safety net 240, the flow in the left direction is restricted.

On the other hand, the safety net 240 has a plurality of thin wires are bonded to cross each other to have a substantially vertical rectangular shape. This is to prevent the air moving to the discharge port 222 inside the indoor unit 100 so as not to interfere, and to regulate the inflow of foreign matter from the outside of the indoor unit 100.

' 모양의 종단면을 가지며, 상기 체결홈(224)에 걸림 결합된다.And, one side of the safety net 240, more specifically, the right end of the edge of the safety net 240 is formed with a hook ring 242 protruding to the right. The hook 242 is approximately 'as shown in FIG.

'Has a longitudinal cross-section, it is coupled to the fastening groove 224.

Therefore, when the locking ring 242 is engaged with the locking groove 224, the right end of the safety net 240 is restricted from the discharge grill 220 to the left side.

Insertion protrusions 244 are formed to protrude from the left end and the top and bottom end of the safety net 240. The insertion protrusion 244 allows the left and the upper and lower sides of the safety net 240 to be restrained from the nozzle grill.

More specifically, the insertion protrusion 244 formed at the upper and left ends of the safety net 240 is inserted into the fastening hole 226 formed at the upper side and the left side of the discharge grill 220, and the lower end of the safety net 240. Insertion protrusion 244 protruded downward in the direction is interfered by the right side of the interference rib 228 is restricted the flow in the left direction.

On the other hand, the right side of the discharge grill 220 is provided with a square plate-shaped louver 260 rounded to the right. The louver 260 is rotatably configured to force the flow direction of air discharged into the room through the discharge port 222.

That is, the louver motor 280 is generated at the lower end of the discharge grill 220 to generate rotational power by applying power, and the louver 260 connected to one side of the louver motor 280 is repeatedly rotated within a predetermined angle range. This becomes possible.

Therefore, the air discharged to the discharge port 222 by the repeated rotation of the louver 260 is capable of air conditioning to the corner of the room.

Hereinafter, the operation of the indoor unit 100 having the above configuration will be described with reference to FIGS. 3 and 4.

First, the indoor unit 100 is applied to power in a state in which the indoor unit 100 is installed as shown in FIG. When power is applied to the indoor unit 100, the front panel 112 receives the rotational power of the grill motor 142 through the gear 146 so that the upper part rotates forward based on the lower part. In this case, the front panel 112 is spaced apart from each other to form a plurality of front panel 112.

In addition, the louver 260 receives rotational power from the louver motor 280 and rotates repeatedly within a predetermined angle range, thereby opening the discharge port 222 as well as discharging the air outside the discharge port 222. Forced to blow until.

At the same time, power is also applied to the fan motor 188 to rotate at a high speed. The motor shaft 188 ′ of the fan motor 188 transmits the rotational power of the fan motor 188 to the turbo fan 180. Will be delivered.

When the rotational power of the fan motor 188 is transmitted to the turbo fan 180, the turbo fan 180 also rotates at a high speed to generate a suction force to the front. With this suction force, the front panel 112 is indoor air. Will be inhaled.

The indoor air passing through the front panel 112 from the room is filtered by the air filter 130 to exchange heat to the heat exchanger 150 inside the indoor unit 100 after the foreign matter is removed.

The indoor air heat exchanged by the heat exchanger 150 is forced to flow rearward through the perforated central portion of the top cover 160, and the turbo fan 180 through the through hole 184 of the turbo fan 180. Is blown in the direction of the outer circumferential surface.

The air passing through the through hole 184 is guided by the air guide 190 to be cut open and formed on the left and right side and bottom surfaces of the main chassis 120, more specifically, the opening 122. It passes through the discharge port 222 of the discharge grill assembly 200 mounted on.

Thereafter, the heat-exchanged air is interfered by the louver 260 and is sent to the corner of the room by changing the flow direction.

Hereinafter, the assembly process of the discharge grill assembly 200 will be described with reference to FIGS. 5 and 6.

First, as shown in FIG. 5, the insertion protrusion 244 formed at the lower end of the safety net 240 in the state where the discharge grill assembly 200 is separated is inserted into the right space of the interference rib 228 to insert the insertion protrusion 244. Is interfered by the right side of the interference rib 228 (see FIG. 6).

In this state, the right side surface of the safety net 240 is close to the left side surface of the discharge port 222. In addition, the upper portion of the safety net 240 is rotated to the left side based on the interference rib 228.

When the safety net 240 is rotated to the left side, the insertion protrusion 244 formed at the left end of the safety net 240 is inserted into the fastening hole 226 formed at the left side of the discharge port 222, and at the same time the locking ring ( 242 is engaged with the fastening groove 224.

At this time, the insertion protrusion 244 formed at the upper end of the safety net 240 is located on the left side spaced apart from the fastening hole 226 formed on the upper side of the discharge grill 220 without being inserted into the fastening hole 226. Done.

In this state, by applying a force to the safety net 240, the left center of the safety net 240 is bent to be convex to the left. Since the safety net 240 is bonded to the thin wires to cross each other as described above, the central portion can be bent by a predetermined height in a state in which elastic restoring force is generated.

When the central portion of the safety net 240 is bent to the left, the upper end of the upper insertion protrusion 244 is located below the lower end of the upper fastening hole 226 of the front panel 112, the safety net 240 By applying a force in the right direction to the coupling of the fastening hole 226 and the insertion protrusion 244 is completed.

When the safety net 240 is installed on the discharge grill 220 through the above process, the foreign matter inserted into the indoor unit 100 from the outside interferes with the turbo fan 180 mounted inside the indoor unit 100. To be safe.

The scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the above technical scope.

The discharge grill assembly of the air conditioner according to the present invention as described above in detail is configured such that the safety net for restricting the inflow of foreign matter into the indoor unit is supported on the discharge grill four sides.

Therefore, there is an advantage that the restraint force between the safety net and the discharge grill is improved to prevent the removal of the safety net from the discharge grill.

In addition, improving the restraint force between the safety net and the discharge grill is also preferable in terms of safety as it improves the shielding functionality of the foreign material flowing into the indoor unit.

In addition, it is obvious that the above-mentioned advantages are expected to improve product satisfaction.

Claims (6)

In the discharge grill assembly of the indoor unit of the air conditioner to form a part of the exterior of the indoor unit and a plurality of mounted on one side of the main chassis in which the parts are embedded to guide the discharge direction of the air inside the indoor unit to the room, The discharge grill assembly, A discharge grill for discharging air inside the indoor unit to the interior; The discharge grill assembly of the indoor unit of the air conditioner is formed in a rectangular wire mesh shape is fixedly mounted to one side of the discharge grill, including a safety net to prevent foreign matter from entering into the indoor unit through the discharge port. The method of claim 1, The discharge grill assembly of an indoor unit of the air conditioner, characterized in that the discharge grill is formed on one side of the discharge grill to restrain the four edges of the safety net to restrict the departure of the safety net. The method of claim 2, wherein the release restriction mechanism, A recess formed and a locking groove engaged with one side of the safety net; A fastening hole formed therein and receiving one side of the safety net therein; Discharge grill assembly of the indoor unit of the air conditioner, characterized in that the protrusion formed by including an interference rib interfering with one side of the safety net. The rim of the safety net according to claim 3, A hook ring which is protruded outward to be engaged with the fastening groove; The discharge grill assembly of the indoor unit of the air conditioner, characterized in that the insertion projection is inserted into the coupling hole is formed. 5. The discharge grill assembly of claim 4, wherein the insertion protrusion is interrupted by an interference rib to restrict movement in one direction. 6. The discharge grill assembly of claim 5, wherein the fastening hole and the fastening groove are formed in plural numbers.

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