KR20100073143A - Ceiling type air conditioner - Google Patents

Abstract

PURPOSE: A ceiling type air conditioner is provided to simplify a repair work of a product by vertically attaching and detaching a door panel opening/closing an air inlet to an inlet panel. CONSTITUTION: A ceiling type air conditioner comprises a main body which is fixed on a ceiling and wherein the bottom surface of the main body is opened, an outlet panel which includes an air outlet and is coupled to the bottom of the main body, a inlet panel which comprises an air inlet and is coupled to the outlet panel, a door panel(300) which is coupled to the inlet panel in order to be ascended and descended and opens and closes the air inlet with being raised, an outer member(301) which forms the exteriors of the bottom face and the surrounding face of the air-conditioner with being arranged in the bottom of the inlet panel, and an inner member(302) which guides the inhale of air inhaled through the air inlet and forms the exterior of the top face of the air-conditioner when the inlet panel is separated.

Description

Ceiling Type Air Conditioner

The present invention relates to a ceiling type air conditioner, and more particularly, to stably open and close an air inlet by a door panel that is elevated by a guide of an inlet panel, and to be sucked into the air inlet by the door panel. The present invention relates to a ceiling type air conditioner capable of stably forming an air intake passage.

In general, the ceiling type air conditioner is largely configured to include an indoor unit installed on the ceiling and performing a cooling function, an outdoor unit performing a heat dissipation and compression function, and a refrigerant pipe connecting the indoor unit and the outdoor unit to each other.

However, the ceiling type air conditioner according to the related art has a problem in that the air inlet port through which air is sucked is always open even when the air conditioner is not operated, and the appearance of the ceiling is not beautiful.

According to the present invention, the door panel is disposed up and down with respect to the inlet panel having the air inlet, thereby opening and closing the air inlet to simplify the external appearance of the air conditioner and to make the product feel the operation, as well as the air inlet. It is an object of the present invention to provide a ceiling type air conditioner capable of stably guiding a suction flow path of air sucked into the air by the door panel to prevent the occurrence of abnormal noise.

The ceiling type air conditioner according to the present invention includes a main body fixed to the ceiling, the bottom of which is opened, a discharge port panel coupled to a lower portion of the main body, and having an air discharge port formed therein, and coupled to the discharge port panel and having an air intake port formed therein. An outer member coupled to the panel and the suction inlet panel, the door panel being opened and closed while concealing or exposing the air inlet when the elevator is lifted, and disposed under the inlet panel to form a lower surface and a circumferential surface; It includes an inner member for guiding the suction of the air sucked into the air inlet when spaced apart from the inlet panel, and to form a top appearance.

The door panel may further include a moving member connecting the outer member to the suction inlet panel to be elevated, and the inner member may be formed with a through hole through which the moving member penetrates.

In addition, the outer member may be provided with a movable member mounting portion is installed on the upper surface.

In addition, the movable member may have a locking portion extending to one side at a lower end thereof, and the movable member mounting portion may protrude to an upper surface of the outer member to surround the edge of the locking portion.

In addition, the inner member may be formed so that the upper surface is convexly rounded upward.

The outer member may include a lower plate part and a side plate part protruding upward along an edge of the lower plate part.

The apparatus may further include a human body sensor module installed on the door panel to detect the behavior of the occupants in the room, and a sensor installation hole may be installed in the outer member and the inner member to allow the human body sensor module to pass therethrough. Can be formed.

The door panel may further include a decorative part disposed between the outer member and the inner member, and the outer member may be formed of a transparent material so that the decorative part is transmitted and observed from the outside.

The door panel may further include a decoration part disposed on a bottom surface of the outer member.

In addition, the outer member may be formed of any one of a metal material, tempered glass or synthetic resin material.

In addition, the inner member may be made of a foamable plastic resin.

Ceiling type air conditioner according to the present invention, the door panel for opening and closing the air inlet is detached in a vertical direction with respect to the inlet panel to facilitate the failure / repair of the product, as well as the door panel is composed of the outer member and the inner member In addition, the upper surface of the inner member has the advantage of forming a stable suction channel of the air sucked through the air inlet and made of a lightweight material to make the door panel more stable lifting.

Hereinafter, a preferred embodiment of the ceiling type air conditioner according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a preferred embodiment of the ceiling type air conditioner according to the present invention, Figure 2 is an exploded perspective view showing the inlet panel of the discharge port panel and the door panel in the configuration of Figure 1, Figure 3 1 is an exploded perspective view showing the inlet panel and the door panel of the configuration of Figure 1, Figure 4 is a cross-sectional view taken along the line AA of Figure 2, Figure 5 is an exploded perspective view of the door panel of Figure 4, Figure 6 7A and 7B are cross-sectional views illustrating a state in which the door panel is attached to and detached from the inlet panel.

One preferred embodiment of the ceiling type air conditioner according to the present invention includes a main body 10 disposed between the ceiling 1 and the ceiling finish 2 disposed below the ceiling 1 as shown in FIG. 1. . The main body 10 is formed so that its bottom surface is opened, and although not shown in the drawing, various heat exchangers such as a blower fan that sucks and discharges indoor air and a heat exchanger that exchanges the sucked air The parts are embedded.

In other words, the main body 10 is a box body having a shape of a substantially rectangular parallelepiped or a cube, the lower part of which is opened, and the heat exchange part is embedded therein.

The lower portion of the main body 10 is provided with a discharge port panel 100 arranged horizontally to approximately match the ceiling finish (2). The discharge port panel 100 is installed in the lower portion of the main body 10 to conceal the lower end of the main body 10, and the opening 105 is formed in the middle portion so that the inlet panel 200 to be described later is installed. do. In addition, the discharge port panel 100 has a plurality of air discharge holes 110 formed along an edge of the air discharged heat exchanged inside the main body 10.

The discharge port panel 100 is also provided in the lower portion of the main body 10 and consists of a substantially rectangular lower end shape of the main body 10, that is, a rectangular parallelepiped or square plate body, to conceal the lower end of the main body 10.

A plurality of wind direction control vanes 115 may be installed in the plurality of air outlets 110 to control the wind direction of the air discharged while opening and closing the respective air outlets 110 by a predetermined angle rotation.

On the other hand, a preferred embodiment of the ceiling type air conditioner according to the present invention, as shown in Figures 2 and 3, the inlet panel 200 which is installed in the discharge port panel 100 to shield the opening 105 More).

The inlet panel 200 is provided with an air inlet 205 having an intermediate portion opened up and down so that indoor air is sucked into the main body 10, and above the air inlet 205. The purification filter 210 may be disposed to filter foreign matter. The purification filter installation unit 215 is formed on the upper surface of the inlet panel 200 to install the purification filter 210 as described above.

Here, the air inlet 205 formed in the middle portion of the inlet panel 200 may be formed in a circular shape so as to be concentrated in the center when the indoor air is inhaled. In this case, the inlet panel 200 serves as an orifice for controlling the flow rate or the flow rate of the air to be sucked, as well as providing an installation place where the purification filter 210 is installed.

However, the air inlet 205 does not necessarily have to be circular, and in some embodiments, it may be formed in a square or other shape so that more air can be sucked at once.

According to an exemplary embodiment of the ceiling type air conditioner according to the present invention, as shown in FIGS. 1 to 3, the air inlet 205 is installed to be lifted and lowered in the lower part of the inlet panel 200. It further includes a door panel 300 for opening and closing.

In this case, the door panel 300 may be formed to a size substantially corresponding to the size of the inlet panel 200. More preferably, the door panel 300 is inlet panel so that when the air inlet 205 is closed in an ascending operation, the inlet panel 200 is concealed without being observed by the user from the inside, i. It may be formed larger than (200).

In addition, the opening 105 may be formed in a substantially rectangular or square shape, and the inlet panel 200 may also be formed in a shape that shields the opening 105, that is, a rectangular or square shape.

As shown in detail in FIG. 4, the door panel 300 is disposed below the inlet panel 200 to form an outer member 301 which forms an outer appearance of the lower surface and the circumferential surface of the door panel 300. And an inner member 302 disposed between the inlet panel 200 and the outer member 301 to form an outer appearance of the upper surface of the door panel 300.

The outer member 301, which forms the outer appearance of the lower surface of the main body 10, and can be directly observed by the user, it may be made of a metal material that emits stray light for high-quality products, will be described later It may be made of a transparent glass material for the combination of the decorative portion, and may be formed of a relatively light weight synthetic resin material.

On the other hand, the inner member 302 serves to guide the suction of the air sucked into the air inlet 205 when spaced apart from the inlet panel 200 in the operation of lowering together when the outer member 301 is lowered. Do it.

The inner member 302 is formed in a shape protruding upward from the center portion as shown in Figure 4, in order to more smoothly guide the suction of indoor air, as a whole, the upper surface of the inner member 302 It is formed in a rounded convex shape upward.

Here, when the blowing fan disposed inside the main body 10 is driven, as shown in FIG. 7A, indoor air is sucked into the main body 10 through the air inlet 205. Since the inner member 302 corresponding to the upper surface of the door panel 300 is convex toward the air inlet 205 and is also rounded in shape, the inlet flow path of the air toward the air inlet 205 is greater. It is to be formed naturally and stably.

In addition, the inner member 302 is disposed above the outer member 301 to form an upper appearance of the door panel 300.

By the way, the door panel 300 having such a configuration should be arranged so that the door panel 300 can be lifted and lowered against gravity having its own in the lower portion of the inlet panel 200. Do. More preferably, the inner member 302 of the door panel 300 is lighter than the outer member 301 in order to lighten the overall weight of the door panel 300 rather than the external appearance because it is not observed by the user. It can be formed as. To this end, the inner member 302 may be made of a foamable plastic resin. In particular, the foamed plastic resin may be made of an EPS material molded through the EPS method.

In this case, the inner member 302 may be provided in such a manner that a foamable resin having a liquid phase is applied to the upper surface of the outer member 301 and the applied resin is solidified into a solid phase. The inner member 302 may be provided in a manner in which a plurality of block shapes having dimensions corresponding to the upper surface shape of the outer member 301 are coupled to the upper surface of the outer member 301.

The outer member 301 has a lower plate portion 301A on which the inner member 302 is seated / installed, and protrudes upward along an edge of the lower plate portion 301A, as shown in FIG. 4. It is comprised including the side plate part 301B.

The lower plate portion 301A and the side plate portion 301B may be integrally formed, and the side plate portion 301B may be separately manufactured to be attached to or detached from an edge of the lower plate portion 301A.

The side plate portion 301B serves to conceal the end of the inner member 302 from the user so that the user does not feel the heterogeneity of the outer member 301 and the inner member 302 having different materials. That is, the side plate portion 301B allows the user to feel a sense of unity in the door panel 300 made of two different materials, the outer member 301 and the inner member 302.

Protruding height of the side plate portion 301B to the upper side is preferably formed to a height corresponding to the vertical height of the edge of the edge of the inner member 302.

On the other hand, the ceiling-type air conditioner according to the present invention, the door panel 300 substantially forms a partial outer surface of the lower surface of the air conditioner, the decorative portion (not shown) arranged to make the appearance more beautiful It may include.

The said decoration part may consist of a film, a sheet | seat, etc. which have a color and a decoration beauty, and may be comprised translucent with a color, a pattern, etc.

Here, when the decorative part is disposed between the outer member 301 and the inner member 302, the outer member 301 is preferably made of a transparent material so that the user can observe.

On the other hand, when the decorative part is disposed on the outer surface (that is, the lower surface) of the outer member 301, the user can immediately observe, the outer member 301 need not be provided with a transparent material. In this case, the outer member 301 is generally made of a commonly used acrylic material, it is possible to attach the decorative portion to the lower surface of the outer member 301 by using an adhesive member such as an adhesive.

In general, in the case of the ceiling-type air conditioner disposed in the ceiling 1 of the room as in the present invention, it is most often disposed in the middle portion of the ceiling 1, in which case the door panel 300 is indoors. A lighting unit (not shown) may be disposed to replace the lighting. In this case, the lighting unit may be configured to irradiate light having a wavelength capable of inducing a good night's sleep and a wavelength beneficial to the body.

On the other hand, a preferred embodiment of the ceiling type air conditioner according to the present invention, as shown in Figure 3, the lifting drive unit 230 for elevating the door panel 300 in the lower portion of the inlet panel 200 It may further include.

In more detail, the lift driver 230 is installed on the upper surface of the inlet panel 200. The lifting driving unit 230 generates a driving force for lifting the door panel 300, and includes a plurality of motors 231 spaced apart from an upper surface of the inlet panel 200, and the plurality of motors 231. A plurality of shafts 232 disposed in parallel with each of the rotating shafts, a plurality of interlocking members 233 for rotating the plurality of shafts 232 according to the rotation of the rotating shafts, and the plurality of shafts ( It is configured to include a rotating member 234 installed and rotated at both ends of the 232.

Briefly looking at the operation of the lifting drive unit 230, first, when the user operates the main body 10 in the operation mode by using an operation unit consisting of a remote control, the plurality of motors 231 to provide a predetermined operation signal. It is applied to rotate in one direction. Next, the plurality of motors 231 are connected to the shaft 232 such that the shaft 232 is rotated by the interlocking member 233 as described above, the shaft 232 is rotated Finally, the rotating member 234 is rotated.

Meanwhile, as illustrated in FIG. 4, the door panel 300 includes a plurality of moving members disposed on an upper surface of the door panel 300 to be connected to the rotating member 234 of the lifting driving unit 230. 335). The plurality of moving members 335 is connected to the lifting driving unit 230 to lift and lower the door panel 300 in an operation of lifting up and down when the lifting driving unit 230 is operated.

The plurality of moving members 335 as described above may be spaced one by one at each corner of the upper surface of the door panel 300.

In more detail, the plurality of moving members 335 are fixed / installed on the upper surface of the outer member 301 of the door panel 300, respectively, and protrude a predetermined length to the upper portion of the inner member 302. Are arranged.

To this end, each of the corners of the upper surface of the outer member 301, as shown in Figures 3 to 5, the movable member mounting portion 340, the movable member 335 is installed is formed, respectively. The movable member mounting portion 340 is formed to protrude a predetermined height upward from the upper surface of the outer member 301 so that a portion of the lower end of the movable member 335 is horizontally fitted and is locked in the vertical direction.

As such, the movable member 335 fitted to the movable member installation unit 340 is more firmly fastened / fixed to the upper surface of the outer member 301 by a predetermined fastening member (not shown).

Here, the inner member 302, the moving member 335 is a portion through which the moving member 335 is disposed so as to protrude upward, that is, a through hole 310 of a predetermined size for each corner portion is Is formed.

On the other hand, the movable member 335 protrudes upward from the upper surface of the inlet panel 200 such that an upper end thereof is connected to the elevating drive unit 230 disposed on the upper surface of the inlet panel 200. That is, as shown in FIG. 3, the inlet panel 200 has a lifting guide hole 240 in each of the corners in order to allow the upper end of the moving member 335 to protrude upward. The panel 200 is formed to penetrate up and down.

The movable member 335 disposed as described above, as the upper and lower portions of the moving member 335 are penetrated through the elevating guide hole 240 and protruded to the upper portion of the inlet panel 200, the elevating member 335 is guided. .

On the other hand, the moving member 335 is detachably attached to the upper portion of the inlet panel 200, so that the user is relatively simple by removing / removing from the inlet panel 200 when the door panel 300 is broken or repaired. There is an advantage to troubleshoot / repair.

In more detail, a stopper (not shown) for restricting the downward movement of the movable member 335 is detached from the upper end of the movable member 335 protruding upward through the elevating guide hole 240. By attaching and detaching the stopper at the upper end of the moving member 335, the door panel 300 can be detached in a vertical direction with respect to the inlet panel 200.

5 and 6, a preferred embodiment of the ceiling type air conditioner according to the present invention further includes a human body sensor module 400 installed in the door panel 300 to detect the behavior of the occupant. do.

The human body sensor module 400 is an operation of rotating the human body sensor (not shown) detects a specific wavelength according to the infrared or radiated from the occupants throughout the entire area of the room according to the temperature of the specific area, where the occupant in the room As a detection means for determining whether the position is located, when the detection result is sent to a control unit not shown in the form of a predetermined electrical signal, the control unit accurately determines the behavior of the occupant together with the location of the occupant or the temperature of the room, The operation rate or the wind direction control vane 115 may be properly controlled to induce air conditioning to an appropriate temperature required for the occupants and concentrated discharge to the place where the occupants are located.

As described above, the human body sensor module 400 is installed in the sensor installation hole 310 formed to penetrate the door panel 300 up and down. In more detail, the door panel 300 is formed such that the sensor installation hole 310 penetrates up and down so that the human body sensor module 400 penetrates up and down, and the human body sensor module 400 is installed. Is installed so as to protrude a predetermined height to the upper or lower portion of the door panel 300 based on the sensor installation hole 310 (see the reference numerals "a" and "b" in the enlarged view of FIG. that).

As such, the reason why the sensor installation hole 310 is formed to penetrate the door panel 300 up and down is because of the structural characteristics of the door panel 300. Since it should be lifted in the direction is formed relatively thin to minimize the weight, as described above to provide the sensor installation hole 310 to penetrate the door panel 300 up and down as well as the sensor installation hole 310 As such, the human body sensor module 400 is installed to protrude a predetermined height to the upper or lower portion of the door panel 300.

At this time, the height of the downward protrusion of the human body sensor module 400 installed in the sensor installation hole 310 is directly observed by the user is preferable to minimize. Therefore, preferably, the human body sensor module 400 may be installed to protrude further upward than the lower portion of the door panel 300.

However, the human body sensor module 400 is most preferably installed to match the lower surface of the door panel 300, that is, the lower surface of the outer member 301, the outer surface of the air conditioner, the door panel ( In order to detect the behavior of the occupants located at the lower part of the lower part, ie, the indoor side, in a wider range (angle), it may be installed to protrude downward to a minimum.

On the other hand, the door panel 300 is driven to close the air inlet 205 by being in close contact with the lower surface of the inlet panel 200 in the operation of ascending from the lower portion of the inlet panel 200 as described above. Therefore, when the door panel 300 in which the human body sensor module 400 is installed is lifted and the lower surface of the inlet panel 200 and the upper surface of the door panel 300 are in surface contact, the human body protruding upwards. The inlet panel 200 may be formed with a human body sensor cover part 260 in which the upper body of the human body sensor module 400 is combined with the inlet panel 200 so as to be prevented from being twisted by the sensor module 400.

Here, the human body sensor cover unit 260 does not necessarily have a shape in which the upper end of the human body sensor module 400 is combined, it is sufficient to accommodate the upper end of the human body sensor module 400. The human body sensor cover 260 is formed to be recessed a predetermined depth from the lower surface of the inlet panel 200 to the upper portion. In addition, the human body sensor cover portion 260 is formed integrally with the inlet panel 200.

The human body sensor cover 260 is preferably formed to be recessed toward the upper at a height greater than the height of the protruding height of the human body sensor module 400 at least protruding from the upper surface of the door panel 300.

Referring to the operation of the ceiling-type air conditioner according to the present invention configured as described above in detail with reference to the accompanying drawings as follows.

First, when a user operates the main body 10 in a driving mode using an operation unit such as a remote controller, a control unit not shown controls to operate the heat exchanger and the blowing fan.

At the same time, as shown in FIG. 7A, the control unit simultaneously operates the plurality of motors 231 of the lift driver 230 disposed in the inlet panel 200, thereby interlocking the linking member 233. Rotating the shaft 232 connected in one direction, respectively, and then rotates the rotating member 234 in one direction while the shaft 232 is rotated, and the moving member connected to the rotating member 234 ( 335 is lowered to the bottom.

At this time, the moving member 335 is lowered to move the door panel 300 downward, the upper surface of the door panel 300 protrudes toward the middle portion of the air inlet 205 as described above. And the round bar is formed, there is an advantage that the flow path of the air sucked through the air inlet 205 is formed more stably.

And, the door panel 300 is coupled to the upper surface of the outer member 301 and the outer member 301, but is composed of the lighter inner member 302 having a lighter weight than the outer member 301 In addition, as a whole, as a single door panel 300 to form a sense of unity, and the structural problem of lifting in the lower portion of the ceiling (ie, when the overall weight of the door panel 300 is excessive, the lifting drive is unstable problem) And, there is an advantage that can overcome the problem of weakening of the binding force due to long time use).

Next, as shown in FIG. 7B, when the user operates the main body 10 in the stop mode using an operation unit such as the remote controller, the controller controls the heat exchanger and the blower fan in the stop mode. In addition, the plurality of motors 231 are rotated in the other direction.

Then, the plurality of motors 231 and the shaft 232 connected by the interlocking member 233 are rotated in the other direction, respectively, to rotate the rotating member 234 in the other direction, and the rotating member ( The moving member 335 connected to 234 is raised upward.

At this time, the door panel 300 ascending upward, the upper surface is in close contact with the lower surface of the inlet panel 200 in the operation of concealing the air inlet 205 to the inlet panel 200 in an open state. While shielding the air inlet 205 has the advantage of simplifying the appearance of the air conditioner.

On the other hand, the door panel 300 is not separately formed in the opening for the intake of air itself, the lower surface of the air conditioner serves to decorate or illuminate to improve some aesthetics or to improve the atmosphere of the room It can be designed to perform, so the variety of designs also has an advantage.

In the above, a preferred embodiment of a ceiling type air conditioner according to a preferred embodiment of the present invention has been described in detail with reference to the accompanying drawings. However, embodiments of the present invention are not necessarily limited thereto, and it is obvious that various modifications or other embodiments falling within the scope equivalent to the present invention may be implemented by those skilled in the art. Therefore, the true scope of the present invention will be defined by the claims that follow.

1 is a perspective view showing a preferred embodiment of the ceiling air conditioner according to the present invention,

FIG. 2 is an exploded perspective view illustrating an intake panel in a state in which a discharge port panel and a door panel are combined in the configuration of FIG. 1;

3 is an exploded perspective view illustrating the inlet panel and the door panel of the configuration of FIG. 1;

4 is a cross-sectional view taken along the line A-A of FIG.

5 is an exploded perspective view illustrating the door panel of FIG. 4;

6 is a cross-sectional view taken along line B-B of FIG. 1,

7A and 7B are cross-sectional views illustrating a door panel attached to and detached from the inlet panel.

<Explanation of symbols on main parts of the drawings>

1: ceiling 2: ceiling finish

10: main body 100: discharge port panel

110: air discharge port 115: wind direction control vane

200: inlet panel 205: air inlet

210: Purification filter 215: Purification filter detachment part

230: lifting drive unit 231: motor

232: shaft 233: interlocking member

234: rotating member 240: lifting guide hole

260: sensor cover portion 300: door panel

301: outer member 301A: lower plate

301B: side plate portion 302: inner member

310: through hole 335: moving member

340: moving member installation unit 400: human body detection sensor module

Claims (11)

A main body fixed to the ceiling and having an open bottom; An outlet port panel coupled to a lower portion of the main body and having an air outlet port; An inlet panel coupled to the outlet panel and having an air inlet; It is coupled to the lift inlet panel, including a door panel that opens and closes while hiding or exposing the air inlet when the lift, An outer member disposed under the inlet panel to form a lower surface and a circumferential surface; Ceiling air conditioner comprising an inner member for guiding the suction of the air sucked into the air inlet when the inlet panel spaced apart, and to form a top appearance. The method according to claim 1, The door panel, Further comprising a movable member for connecting the outer member to the suction inlet panel to be elevated, Ceiling type air conditioner having a through hole through which the moving member penetrates the inner member. The method according to claim 2, The outer member is a ceiling-type air conditioner is provided with a movable member mounting portion is installed on the upper surface. The method according to claim 3, The moving member is formed with a locking portion extending to one side at the bottom, The moving member installation unit, Ceiling type air conditioner is formed to protrude to the upper surface of the outer member surrounding the edge of the locking portion. The method according to claim 1, The inner member is a ceiling type air conditioner, the upper surface is formed convexly rounded upward. The method according to claim 1, The outer member, Ceiling type air conditioner including a lower plate and a side plate protruding upward along the edge of the lower plate. The method according to claim 1, It is installed on the door panel further comprises a human body sensor module for detecting the behavior of the occupants located in the room, Ceiling type air conditioners, the outer member and the inner member is formed with a sensor installation hole so that the human body sensor module is installed through. The method according to claim 1, The door panel further comprises a decorative portion disposed between the outer member and the inner member, The outer member is a ceiling-type air conditioner formed of a transparent material so that the decoration is transmitted through the outside. The method according to claim 1, The door panel, the ceiling air conditioner further comprises a decorative portion disposed on the lower surface of the outer member. The method according to any one of claims 1 to 9, The outer member is a ceiling-type air conditioner formed of any one material of metal or tempered glass or synthetic resin. The method according to any one of claims 1 to 9, The inner member is a ceiling air conditioner made of a foamed plastic resin.

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