JP2010159909A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of reducing the number of components and easy to be changed to an outside air introducing type. <P>SOLUTION: The air conditioner includes an optional outside air introduction box 60 formed of polystyrene foam which is inserted to a blow-off passage β formed of polystyrene-foam in a casing 21. The outside air introduction box 60 integrally has a first opening 77 for taking outside air which communicates with the outside of the casing 21, a second opening 78 for introducing outside air which is fitted to a lower surface of a drain pan 40 to communicate with a suction passage α of an air blower 33, and a passage 79 for connecting these openings 77, 78. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an outside air introduction structure for an air conditioner.

The air conditioner includes a so-called ceiling cassette type in which a casing including a blower, a heat exchanger, and the like is accommodated in the back of the ceiling, and a decorative panel is exposed from the ceiling (in the case of four outlets, a four-way ceiling cassette type) Say). When this type of air conditioner is installed in a place that is subject to building management law such as a high floor of a building, a chamber and an outside air introduction duct prepared as an option by the manufacturer are attached, and the outside air is removed from the air conditioner. (See, for example, Patent Document 1).
JP 2000-28161 A

However, in the configuration described in Patent Document 1, since the outside air introduction chamber is disposed between the decorative panel and the blower, the air conditioner is enlarged in the vertical direction.
On the other hand, when introducing outside air without providing a chamber, it is necessary to form an outside air introduction path for sending outside air to a suction port through which the blower sucks air. Conventionally, a structure in which an outside air introduction path is formed in a heat insulating material made of foamed polystyrene that is fitted inside the housing has been proposed. More specifically, in the case of a four-way ceiling cassette type, the heat insulating material is a decorative panel. There was a blowout air passage communicating with the four air outlets provided, and an outside air introduction passage was formed in a region between the adjacent blowout air passages, that is, in a corner portion.
However, in the case of this configuration, it is necessary to arrange the sealing material between the heat insulating material and the housing in order to prevent the outside air passing through the outside air introduction passage from leaking into the blowout air passage. It will be complicated. In addition, there may be a slight gap between the drain pan and the heat insulating material. In this case, dry dust or the like on the drain pan may enter the outside air introduction path.
In addition, it is cumbersome to prepare heat insulation separately depending on whether or not the option of introducing outside air is attached. On the other hand, if the heat insulating material is shared by a type having an outside air introduction path, A seal member is required.

  Accordingly, an object of the present invention is to provide an air conditioner that can solve the above-described problems of the conventional technology, reduce the number of parts, and can be easily changed to an outside air introduction type.

In order to solve the above-described problems, the present invention includes a blower and a heat exchanger in a box-shaped housing, and a drain pan is disposed below the heat exchanger, and a suction port and an outlet are disposed below the drain pan. In the air conditioner provided with a foamed polystyrene blowout passage connected to the blowout outlet in the casing, the outside air introduction component made of optional foamed polystyrene inserted into the blowout passage is provided. The introduction part has an opening for taking in outside air that communicates with the outside of the casing, an opening for introducing outside air that fits into the lower surface of the drain pan and communicates with the suction passage of the blower, and a passage that connects these openings. It is characterized by having.
According to the present invention, the outside air introduction part made of an optional polystyrene foam inserted into the blow-out passage is provided. Since it has an opening for introducing outside air that communicates with the passage and a passage that connects these openings, the outside air introduction component is inserted into the blowing passage and is in close contact with the blowing passage. It is possible to prevent leakage of outside air through the introduced parts. For this reason, the number of parts can be reduced by the amount of not using the sealing material, and the outside air introduction type can be easily changed.

In the above configuration, the heat exchanger may extend so as to surround the blower, and both ends thereof are connected by a tube plate, and the outside air introduction component may be disposed at a position close to the tube plate. According to this configuration, since the outside air introduction component is arranged at a position close to the tube sheet, the influence of the outside air introduction component on the flow of the conditioned air is small as much as the tube sheet exists, and is located away from the tube sheet. The influence on the outlet can be reduced.
Further, in the above configuration, the outside air introduction component may have a eaves portion that covers the outside air introduction opening from the decorative panel side and fits on the lower surface of the drain pan. According to this configuration, the outside air introduction component can be positioned by the eaves and the outside air introduction direction can be guided in an appropriate direction.
Further, in the above configuration, the lower surface of the drain pan has a contact portion that contacts a region between the suction port and the outlet of the decorative panel, and the contact portion has a notch into which the eaves portion is fitted. A part may be formed, and a foamed polystyrene filling material may be detachably fitted into the cutout part. According to this configuration, the drain pan can be shared regardless of whether it is an outside air introduction type.

  The present invention includes an optional outside air introduction part made of polystyrene foam to be inserted into the blow-out passage, and the outside air introduction part is fitted into an outside air intake opening communicating with the outside of the housing and a lower surface of the drain pan, and is provided in the suction passage of the blower. Since it has integrally the opening part for the external air introduction | transduction which connects and the channel | path which connects these opening parts, a number of parts can be reduced and it can change to an external air introduction type easily.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing an installation state of an indoor unit of a ceiling-embedded air conditioner according to the present embodiment. In the following description, directions such as up, down, left, and right are directions corresponding to the installation state.
The indoor unit 10 is configured in a so-called ceiling cassette shape in which the apparatus main body 20 (housing 21) is installed behind the ceiling and the decorative panel 100 is exposed from the ceiling. More precisely, the indoor unit 10 has four outlets 120. It is configured as a directional ceiling cassette.
The apparatus main body 20 includes a metal casing 21 constituting an outer case thereof, and air conditioning components such as a blower 33 and a heat exchanger (indoor heat exchanger) 35 are accommodated in the casing 21. . The casing 21 is formed by sheet metal processing of a metal plate, and includes a top plate portion (top plate) 21b and a side plate portion (side plate) 21c extending downward along the outer edge of the top plate portion 21b. The entire surface is formed in a box shape.

  Suspension fittings 28 for suspending the apparatus main body 20 are provided on the four corners on the outer surface of the side plate portion 21c of the casing 21, respectively. The suspension fitting 28 is attached to a suspension bolt 29 on the back of the ceiling, and is supported in such a manner that the apparatus main body 20 is suspended. In addition, the apparatus main body 20 can be fixed to a holding bar provided in a lattice shape on the ceiling surface.

The decorative panel 100 is attached to the lower part of the apparatus body 20, that is, the lower part of the housing 21. The decorative panel 100 is formed of a resin panel, has a rectangular shape larger than the lower opening of the housing 21, and has a single inlet 110 for taking in indoor air at the center thereof. A plurality of (four in this example) air outlets 120 are provided around the mouth 110 along the four sides of the decorative panel 100 to blow out air after heat exchange.
A suction grill 111 is detachably attached to the suction port 110 of the decorative panel 100, and an air filter (not shown) is attached to the suction grill 111, and indoor air sucked into the suction port 110 by the air filter is received. Clean. Further, a louver 122 for changing the wind direction is disposed at the outlet 120 of the decorative panel 100, and the louver 122 is rotated by driving a motor (not shown).

  Corner panels 102 are attached to the four corners of the decorative panel 100. The corner panel 102 is configured to be detachable toward the lower side of the decorative panel 100. When the corner panel 102 is removed, the corner panel 102 is manually attached to the above-described engagement position between the hanging bracket 28 and the hanging bolt 29. The size is such that can enter.

2 is a perspective view of the apparatus main body 20 of the indoor unit 10, FIG. 3 is a plan view of the apparatus main body 20 as viewed from below, and FIG. 4 is a view showing a cross section taken along line IV-IV in FIG. 3 and 4 show a state that is upside down from the time of installation. In addition, in each figure, the components for introducing outside air that the manufacturer prepares as an option corresponding to the case where the indoor unit 10 is installed in a place where the building management method is applied such as a high floor of the building are also described. Reference numeral 50 denotes a ventilation duct for introducing outside air, reference numeral 55 denotes a duct connecting component for connecting the ventilation duct 50 to the casing 21 of the indoor unit 10, and reference numeral 60 denotes the indoor unit 10. An outside air introduction box (outside air introduction component) attached in the housing 21 is shown.
First, components other than the components (50, 55, 60) for introducing outside air will be described.
A heat insulating material 30 made of polystyrene foam is disposed inside the housing 21. The heat insulating material 30 is disposed on substantially the entire surface of the top plate heat insulating portion 30 b (see FIG. 4) disposed on the substantially entire surface of the top plate portion (top plate) 21 b of the housing 21 and the side plate portion 21 c of the housing 21. The side plate heat insulating portion 30c (see FIG. 4) is integrally formed, and is formed in a box shape that opens downward. That is, the heat insulating material 30 has a heat insulating structure that covers the entire inner surface of the housing 21 and insulates between the inside and outside of the housing 21, and air-conditioning such as the blower 33 and the heat exchanger 35 in the heat-insulated internal space. Parts are accommodated.

As shown in FIGS. 2 and 3, the blower 33 is provided substantially at the center of the housing 21 (a position corresponding to the central portion of the top plate portion 21 b), and the motor shaft faces the top plate portion 21 b of the housing 21 downward. The fan motor 33a is attached to the motor shaft (reference numeral 33a is attached to the motor shaft in FIG. 3) and the centrifugal fan 33b is attached to the motor shaft of the fan motor 33a. Air in the conditioned room (room air) is sucked from the suction port 110 of the panel 100 and blown out in the centrifugal direction.
As shown in FIG. 3, the heat exchanger 35 is a fin-and-tube type heat exchanger, and is arranged in a polygonal shape so as to surround the blower 33 in order to secure a large heat exchange area. The one end 35 a and the other end 35 b of the heat exchanger 35 are connected by a tube plate 36. As a result, the heat exchanger 35 and the tube plate 36 allow the interior of the housing 21 to be in contact with the primary space R1 of pre-harmonic air R1 (the central portion of the housing 21 in plan view) as shown in FIG. In addition, the air is conditioned with a secondary space R2 (air around the side plate portion 21c of the housing 21 in a plan view) of conditioned air (conditioned air).

  As shown in FIG. 3, the tube plate 36 is inclined with respect to the longitudinal direction of the side plate portion 21 c of the housing 21 so as to expand the outer space S1 (space between the tube plate 36 and the housing 21). The piping 37 connected to the heat exchanger 25 is disposed in the space S1. The external connection port 37a of the piping 37 is exposed to the outside from the end portion of the side plate portion 21c (indicated by reference numeral 21c1 in FIG. 3) adjacent to the tube plate 36, and the piping from the outside of the housing 21 is provided. Connection work is configured to be possible. A drain pump (not shown) disposed in an inner space (a space between the heat exchanger 35 and the housing 21) S2 discharges the drain at the opposite end of the side plate portion 21c1. The drain discharge pipe 38 is exposed to the outside, and the drain pipe connection work can be performed from the outside of the casing 21. Thus, since the connection part of refrigerant | coolant piping or drain piping is collectively arrange | positioned to one side-plate part 21c1 of the housing | casing 21, the piping operator can perform work from the substantially same position.

Below the heat exchanger 35, a styrene foam drain pan 40 is disposed to prevent the drain from the heat exchanger 25 from leaking into the conditioned room, and the drain pan 40 insulates the inside of the housing 21. Also serves as part of the material.
The drain pan 40 has a suction opening 40a (see FIG. 4) in a portion corresponding to the suction port 110 of the decorative panel 100, and a bell mouth 42 is attached to the suction opening 40a. A contact portion 40b (see FIG. 2) is formed in which the periphery of the suction opening 40a protrudes downward and contacts the decorative panel 100.

  The contact portion 40 b extends so as to surround the blower 33 and has a shape that contacts a region between the suction port 110 of the decorative panel 100 and the outlet 120, and the suction port 110 of the decorative panel 100. Only communicates with the suction portion (centrifugal fan 33b) of the blower 33 through the suction passage α surrounded by the contact portion 40b. In other words, the contact part 40b functions as a partition that does not allow the blower outlet 120 of the decorative panel 100 to communicate with the suction passage α. Inside the suction passage α, an electrical box 44 that houses electrical components is disposed near the side plate 21c1 of the housing 21 so as not to overlap the opening of the bell mouth 42.

The drain pan 40 is provided with a plurality (four in this example) of blowout openings 40 c at portions corresponding to the blowout openings 120 of the decorative panel 100. As shown in FIG. 4, the blowout opening 40 c communicates with the secondary side space R <b> 2 surrounded by the heat insulating material 30 (the top plate heat insulating portion 30 b and the side plate heat insulating portion 30 c) and the heat exchanger 35.
That is, since this secondary side space R2 is a space in which the blower 33 blows out in the centrifugal direction and passes through the heat exchanger 35, that is, conditioned air enters, the conditioned air in this secondary side space R2 is It can blow out from the blower outlet 120 of the decorative panel 100 through the opening part 40c for blowout. That is, the blowout passage β made of styrene foam that communicates with the blowout port 120 of the decorative panel 100 is formed by the heat insulating material 30 and the blowout opening 40 c of the drain pan 40.

In the present embodiment, when an outside air introduction part prepared as an option by the manufacturer is attached to the indoor unit 10, an outside air introduction box (outside air introduction part) 60 is inserted into the blowout passage β made of polystyrene foam. Yes.
5 to 7 are external views of the outside air introduction box 60 as seen from different directions, and FIG. 8 is a view showing the outside air introduction box 60 together with the apparatus main body 20.
The outside air introduction box 60 includes a box body 70 made of foamed styrene, and this box body 70 has a front wall 71, left and right side walls 72, 72, a rear wall 73, a bottom 74, and a lid 75. The inside is formed in a substantially rectangular parallelepiped box shape. Here, when the outside air introduction box 60 is inserted into the outlet passage β of the indoor unit 10, the bottom portion 74 is located on the back side (top plate portion 21 b side), and the lid portion 75 is on the near side (drain pan 40 side). To position.

The box body 70 includes a first opening (opening portion for taking in outside air) 77 (see FIG. 6) provided in the rear wall 73 and a second opening portion (open air introduction) provided on the lid portion 75 side of the front wall 71. 78 (see FIG. 7). The first opening 77 and the second opening 78 communicate with each other through an internal passage (cavity) 79. It is blocked.
Further, the box body 70 is provided with an eaves portion 80 that elongates forward so as to cover the upper side of the second opening 78. The eaves 80 includes a plate member 81 having a U-shaped cross section formed to have a width substantially the same as the width of the box body 70, a bridging member 83 bridged between the plate member 81 and the box body 70, And an insulating sheet 85 made of polystyrene foam that covers the appearance of the portion 80 (the appearance of the plate member).
The plate member 81 is formed by bending a metal plate into a U-shape, and is formed integrally with the front wall 71 of the box body 70, and is a pair of left and right extensions extending in the vertical direction on the left and right sides of the second opening 78. It is connected to the box main body 70 via the portions 71 a and 71 a and a bridging member 83 disposed at the center of the second opening 78. Accordingly, the plate member 81 covers the lid 75 side and the left and right side walls 72 and 72 of the second opening 78, respectively, and opens the second opening 78 only on the front wall 71 side. .

The bridging member 83 is also formed by bending a metal plate, and a U-shaped portion 83a and a pair of left and right flange portions 83b and 83b extending to the left and right of the U-shaped portion 83a are integrated. Have. The bridging member 83 connects the pair of left and right flange portions 83b and 83b to the plate member 81 in a state where the U-shaped portion 83a is oriented so as not to block the second opening 78, and the U-shaped portion 83a. Is brought into contact with the upper end surface 71b of the front wall 71, so that the opening of the second opening 78 is inserted between the box body 70 and the plate member 81 so as not to be narrowed.
In the present embodiment, as shown in FIG. 4, the bridging member 83 is fixed to the box main body 70 with screws 86, and the plate member 81 is fixed to the bridging member 83 with screws (not shown) to thereby obtain the plate member 81. However, the present invention is not limited to this, and the mutual connection method among the plate member 81, the bridging member 83 and the box main body 70 may be a mechanical connection method such as a screw or a double-sided tape. This bonding method or the like may be used as appropriate. In the present embodiment, the plate member 81 and the bridging member 83 are formed of a metal material, but may be formed of a plate material having other rigidity such as a resin plate.

As shown in FIG. 8, when the outside air introduction box 60 is inserted into the blowout passage β made of styrene foam, the outside air introduction box 60 is provided on the rear wall 73 of the box body 70 with the eaves 80 facing the drain pan 40 side. The first opening 77 is inserted into the outlet passage β in a posture toward the side plate portion 21c (hereinafter referred to as reference numeral 21c2) of the housing 21.
In this case, the outside air introduction box 60 is inserted until the eaves 80 is fitted to the lower surface of the drain pan 40 (see FIG. 4). That is, as shown in FIG. 8, the drain pan 40 is provided with a notch portion 91 into which the eaves portion 80 can be fitted in a portion where the decorative panel 100 abuts (abutment portion 40 b). Is inserted into the notch 91 to allow the second opening 78 of the outside air introduction box 60 to communicate with the suction passage α between the suction port 110 of the decorative panel 100 and the blower 33.
In this case, after the eaves 80 is fitted into the notch 91 of the drain pan 40, the eaves 80 is fixed to the drain pan 40 with a screw 92 (see FIG. 4). Does not come off from the apparatus main body 20.

Further, when the outside air introduction box 60 is not attached to the apparatus main body 20, the drain pan 40 is fitted with a filling material 93 made of styrene foam filling the notch 91 (see FIG. 2).
On the other hand, the box body 70 of the outside air introduction box 60 is formed with a depth dimension that fits between the blowout passages β made of polystyrene foam, as shown in FIG. In this configuration, since the members (drain pan 40 and side plate heat insulating portion 30c) constituting the blowing passage β and the box main body 70 are common to the foamed polystyrene material having elasticity, the box main body 70 is blown out by the mutual elastic deformation. Close contact with.
More specifically, as shown in FIGS. 4 and 6, the box body 70 is formed such that the outer surface of the rear wall 73 is a flat surface (vertical surface in the installed state) along the side plate heat insulating portion 30 c, and the front wall The outer surface of 71 is formed as an inclined surface that gradually increases in depth from the bottom 74 toward the lid 75. For this reason, while making this box main body 70 into the shape which fits so strongly that it is inserted in the blowing channel | path (beta), if the box main body 70 is inserted to the back, the box main body 70 will be firmly stuck to the drain pan 40 and the side-plate heat insulation part 30c. be able to. In this case, since the entire rear wall 73 of the box main body 70 is in close contact with the side plate heat insulating portion 30c, the gap between the box main body 70 and the side plate heat insulating portion 30c can be closed.

As shown in FIG. 8, knockout holes 95 are formed in the casing 21 of the apparatus main body 20 at intervals along the edge of the region corresponding to the first opening 77 of the box main body 70. Therefore, by cutting the members between the knockout holes 95 so as to connect the knockout holes 95, the duct port 96 (see FIG. 4) of the ventilation duct 50 for introducing the outside air can be easily formed.
When the duct port 96 is formed, as shown in FIG. 4, the outside air inserted into the apparatus main body 20 is removed by removing a part of the heat insulating material 30 (side plate heat insulating portion 30 c) in accordance with the duct port 96. The first opening 77 of the introduction box 60 communicates with the outside of the housing 21 through the duct port 96. The duct connection component 55 described above is fixed to the outside of the housing 21 with screws, and the ventilation duct 50 for introducing outside air is connected via the duct connection component 55.

  When the outside air is introduced into the room, the outside air from the ventilation duct 50 enters the outside air introduction box 60 from the first opening 77 through the duct port 96, and from the second opening 78 of the outside air introduction box 60. It flows into the suction passage α and merges with the room air. For this reason, after the mixed air of indoor air and outside air flows to the heat exchanger 35 by the blower 33 and exchanges heat with the refrigerant in the heat exchanger 35 to adjust the temperature, the conditioned air is heated. The air is blown into the room from the blower outlet 120 of the decorative panel 100 through the blowout passage β formed on the outer peripheral side of the exchanger 35. Thereby, after adjusting outside air to desired temperature, it can blow out indoors and can introduce appropriate outside air.

As described above, the box body 70 of the outside air introduction box 60 is inserted into the blowing passage β made of styrene foam and is in close contact with the wall of the blowing passage β, so that the outside air passing through the outside air introduction box 60 leaks into the blowing passage β. It can be prevented. That is, in this configuration, it is possible to prevent a situation in which outside air leaks into the blowing passage β without passing through the heat exchanger 35 without using a sealing material.
Moreover, since the outside air introduction path is formed by inserting the outside air introduction box 60 into the blowout passage β made of polystyrene foam, the outside air introduction path can be easily provided as compared with the case where the outside air introduction path is formed in the heat insulating material 30. In addition, even if there is a slight gap between the drain pan 40 and the heat insulating material 30, the gap does not communicate with the outside air introduction path, so that dry dust or the like on the drain pan 40 does not enter the outside air introduction path. .

Furthermore, there is no difference in whether or not the outside air introduction option is attached to the heat insulating material 30 and only whether or not the drain pan 40 is provided with the notch 91, so that the heat insulating material 30 can be shared. The drain pan 40 can also be shared. That is, the indoor unit 10 can be easily changed to the outside air introduction type by attaching the outside air introduction parts 50, 55, 60 to the apparatus main body 20 as necessary.
Moreover, in this embodiment, since the part (eave part 80) engage | inserted in the drain pan 40 of the external air introduction box 60 was formed with the metal material, and it was set as the structure covered with the heat insulation sheet 85, these have low rigidity compared with a metal. It can be formed thinner than when made of polystyrene foam. Thereby, the second opening 78 can be secured large, that is, the outside air introduction passage can be secured widely, and the rigidity of the eaves 80 can be sufficiently increased.

As described above, according to the present embodiment, the outside air introduction box 60 made of an optional polystyrene foam inserted into the blowing passage β is provided, and this outside air introduction box 60 is a first outside air intake that communicates with the outside of the housing 21. Since the opening 77, the second opening 78 for introducing outside air that is fitted to the lower surface of the drain pan 40 and communicates with the suction passage α of the blower 33, and the passage 79 that connects these openings 77, 78 are integrally provided, the seal Since the material is not used, the number of parts can be reduced, and assembly is facilitated. For this reason, it can be easily changed to the outside air introduction type.
Further, in this configuration, the outside air introduction box 60 has the eaves 80 that covers the second opening 78 for introducing outside air from the decorative panel 100 side and fits on the lower surface of the drain pan 40. 60 can be positioned and the introduction direction of outside air can be guided in an appropriate direction.
Further, the lower surface of the drain pan 40 has a contact portion 40b that contacts a region between the suction port 110 and the outlet 120 of the decorative panel 100, and the contact portion 40b has a length of the outside air introduction box 60. Since the cutout portion 91 into which the portion 80 is fitted is formed, and the foaming material 93 made of polystyrene foam is detachably fitted into the cutout portion 91, it can be shared regardless of whether the drain pan 40 is an outside air introduction type or not. .

Further, in this configuration, as shown in FIG. 2, the outside air introduction box 60 is inserted into the blowout passage β that is close to the tube plate 36 of the heat exchanger 35 among the plurality of blowout passages β. The reason is that, when the outside air introduction box 60 is arranged in the blowout air passage β close to the tube plate 36, the conditioned air that has passed through the heat exchanger 35 is guided to the tube plate 36 and flows into the blowout air passage β in the vicinity. Therefore, even if the outside air introduction box 60 is placed as much as the tube sheet 36 exists, the influence on the flow is small.
If the outside air introduction box 60 is arranged in the blowing air passage β away from the tube plate 36, since the influence on the flow of the outside air introduction box 60 is great, the blowing characteristics of the indoor unit 10 (distribution of the blowing amount, etc.) Will change drastically.
In this way, by inserting the outside air introduction box 60 into the outlet passage β adjacent to the tube plate 36 of the heat exchanger 35, the influence on the outlet 120 located away from the tube plate 36 can be reduced, As a whole, fluctuations in the blowing characteristics can be suppressed.
Further, as described above, the pipe worker is located near the tube plate 36 from the outside of the housing 21, so that the outside air introduction box 60 is inserted near the tube plate 36. There is also an effect that various operations such as confirmation or attachment / detachment of pipes and ducts can be performed from substantially the same position.

  Note that the above embodiment is an aspect of the present invention and can be modified as appropriate without departing from the spirit of the present invention. For example, in the above-described embodiment, the case where the present invention is applied to a four-way ceiling cassette type air conditioner has been described. However, the present invention is not limited to this and can be applied to other air conditioners such as a two-way ceiling cassette type. It is.

It is a figure which shows the installation state of the indoor unit of the ceiling-embedded air conditioning apparatus which concerns on this Embodiment. It is a perspective view which shows the apparatus main body of an indoor unit. It is the top view which looked at the apparatus main body from the downward direction. It is a figure which shows the IV-IV cross section of FIG. It is an external view of an outside air introduction box. It is an external view of an outside air introduction box. It is an external view of an outside air introduction box. It is a figure which shows an external air introduction box with an apparatus main body.

10 Indoor unit (air conditioner)
DESCRIPTION OF SYMBOLS 20 Apparatus main body 21 Case 30 Heat insulating material 33 Blower 35 Heat exchanger 36 Tube plate 40 Drain pan 50 Ventilation duct 55 Duct connection component 60 Outside air introduction box (outside air introduction component)
70 Box body 77 First opening (opening for taking in outside air)
78 second opening (opening for introducing outside air)
79 passage 80 eaves portion 83 bridging member 91 notch portion 93 filling material 100 decorative panel 110 suction port 111 suction grill 120 blower outlet α suction passage β blowout passage

Claims (4)

A box-shaped housing is provided with a blower and a heat exchanger, a drain pan is disposed below the heat exchanger, and a decorative panel having a suction port and an outlet is disposed below the drain pan. In addition, in an air conditioner equipped with a blowing passage made of polystyrene foam connected to the outlet,
An outside air introduction part made of an optional polystyrene foam inserted into the blowing passage is provided. An air conditioner characterized by integrally including an opening for introducing outside air that communicates with a passage that connects these openings.   The said heat exchanger is extended so that the said air blower may be enclosed, the both ends are connected with the tube sheet, The said external air introduction component has been arrange | positioned in the position close | similar to this tube sheet. Air conditioner.   3. The air conditioner according to claim 1, wherein the outside air introduction component has an eaves portion that covers the outside air introduction opening from the decorative panel side and fits on a lower surface of the drain pan. 4.   A lower surface of the drain pan has an abutting portion that abuts an area between the suction port and the outlet of the decorative panel, and a notch portion into which the eaves portion is fitted is formed in the abutting portion. The air conditioning apparatus according to claim 3, wherein a filling material made of expanded polystyrene is detachably fitted in the cutout portion.

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