JPH0431463Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a service cover mounting structure for a ceiling-suspended air conditioning unit.

(Prior Art) Separate type air conditioners are increasingly being installed at a high location, such as in apartments and condominiums, where the outdoor unit side is also installed on the ceiling of a balcony. When installing at a high place like this, it is recommended to provide an opening in the bottom plate of the outdoor unit and attach a service cover to this opening, as described in Japanese Utility Model Publication No. 52-3094. The internal equipment can be taken out simply by removing the lid, allowing inspection and repair work to be carried out quickly. In this case, if you want to make the service opening as large as possible in an outdoor unit with a U-shaped heat exchanger and improve service work efficiency, you can create an opening in the center of the drain receptacle and use it as a service opening. It is possible to do so. As the service lid mounting structure in this case, the structure shown in FIG. 4 can be considered in consideration of facilitating the mounting work. In the figure, 72 is the bottom plate of the outdoor unit;
3 is an opening provided in this bottom plate 72, and a service lid 74 is attached to this opening 73. A positioning protrusion 75 that protrudes upward and fits into the opening 73 is formed on the peripheral edge of the service lid 74, and a mounting edge 75 that protrudes laterally and is attached to the lower surface 84 of the bottom plate 72. Projecting edge 76
is formed. On the other hand, the opening 7 of the bottom plate 72
An inner protruding edge 81 that protrudes upward is formed on the third circumferential edge (inner circumferential edge), and an outer protruding edge 82 that protrudes upward is also formed on the outer circumferential edge, and these inner and outer protruding edges 81, The bottom plate 72 by 82
A drain receiver 83 is integrally formed with the drain receiver 83 .
Further, on the lower surface 84 of the bottom plate 72, a stepped portion 85 is formed near the opening 73 side, into which the protruding edge 76 for attaching the service lid 74 is fitted. and bottom plate 7
The positioning protruding edge 75 of the service lid 74 is fitted into the inner protruding edge 81 of No. 2, and the mounting protruding edge 76 is fitted into the stepped portion 85. in this case,
The mounting protruding edge 76 is attached to the stepped portion 8 through appropriate means.
It is detachably attached to 5. Note that 86 is a side plate, and although the outdoor heat exchanger is not shown in the figure, it is assumed that it is arranged above the drain receiver 83.

According to the above-described service lid mounting structure for a ceiling-suspended air conditioning unit, the drain water generated when the outdoor heat exchanger acts as an evaporator is received by the drain receiver 83 of the bottom plate 72 and drained to the outside of the unit as appropriate. be discharged. On the other hand, while the outdoor unit is still installed hanging from the ceiling, open the service cover 7 through the opening 73.
By removing 4, the internal equipment can be easily taken out of the machine, allowing inspection and repair work to be carried out quickly.

(Problem to be solved by the invention) However, according to the service lid mounting structure of the above-mentioned ceiling-suspended air conditioning unit, if the drain water from the drain receiver 83 cannot be drained properly to the outside of the machine, a situation may arise. If this occurs, the drain water will not flow to the side plate 86 side, but rather overflow the inner protruding edge 81 of the bottom plate 72 and flow into the opening 73.
It will fall onto the service lid 74. In that case, a part of the drain water flowing out along the inner surface of the inner protruding edge 81 is formed between the bottom plate 72 and the service lid 74, that is, between the inner protruding edge 81 and the positioning protruding edge 75. It is expected that the liquid will leak out of the machine through the gap and the gap formed between the stepped portion 85 and the mounting protrusion 76. It is clear that if drain water leaks from the service lid attachment part in this way, it will scatter on the floor, impairing the comfort of the room.

This invention was made to solve the above-mentioned conventional problems, and its purpose was to facilitate the installation work, and also to prevent situations in which drain water could not be properly discharged to the outside of the machine. It is an object of the present invention to provide a service lid mounting structure for a ceiling-suspended air conditioning unit that can prevent drain water from leaking from a service lid mounting part even when a service lid mounting part occurs.

(Means for solving the problem) Therefore, in the service cover mounting structure of the ceiling-suspended air conditioning unit of this invention, the service cover 3 is installed in the opening 31 provided in the bottom plate 2 of the ceiling-suspended air conditioning unit.
2, and has a structure for attaching the service lid 3.
A positioning protruding edge 52 is formed on the peripheral edge of 2 to protrude upward and fit into the opening 31, and
Forming a mounting protruding edge 53 that protrudes laterally and is attached to the lower surface 56 side of the bottom plate 2, and forming an inner protruding edge 36 that protrudes upward at the peripheral edge of the opening 31 of the bottom plate 2; An outer protruding edge 35 that protrudes upward is formed at a position outside of this inner protruding edge 36, and a drain receptacle 35 is formed between both protruding edges 36, 35.
7, and a protruding edge 5 for positioning the service lid 32 at a position near the opening 31 of the bottom plate 2.
2 fits into the first step portion 55, and the service lid 3
A second step portion 57 is formed into which the mounting projecting edge 53 of No. 2 fits, and the first step portion 55 is formed on the inner surface of the inner projecting edge 36 when the positioning projecting edge 52 is fitted. 54 is dimensioned so as to protrude further toward the opening 31 than the inner surface 58 of the positioning protruding edge 52.

(Function) In the above-described service lid mounting structure for a ceiling-suspended air conditioning unit, the positioning protruding edge 52 of the service lid 32 is fitted to the first step 55 of the bottom plate 2 to position the service lid 32, In addition, when the protruding edge 53 for attachment is fitted and attached to the second step portion 57, the inner surface 54 of the inner protruding edge 36 of the bottom plate 2 protrudes further toward the opening 31 than the inner surface 58 of the protruding edge 52 for positioning. become. Therefore, even if a situation arises in which the drain water accumulated on the drain receptacle 37 of the bottom plate 2 cannot be properly drained out of the machine, it will overflow the inner protruding edge 36 and drain the inner protruding water. Opening 3 along inner surface 54 of edge 36
1, the drain water flowing into
will fall on top of it. Therefore, the space between the bottom plate 2 and the service lid 32, that is, the space formed between the first step 55 and the protruding edge 52 for positioning, and the space formed between the second step 57 and the protruding edge 53 for attachment. This will prevent the flow of drain water through the gap. Furthermore, even if some of the drain water flowing into the opening 31 were to enter the gap between the bottom plate 2 and the service lid 32, the amount would be very small and the leakage path would be long. In this respect as well, leakage of drain water to the outside of the machine can be prevented.

(Example) Next, an example of the service cover mounting structure for a ceiling-suspended air conditioning unit of this invention will be described in detail with reference to the drawings.

FIG. 3 is an exploded perspective view showing the overall configuration of an embodiment in which this invention is applied to an outdoor unit of a multi-type (two-chamber air conditioning type) air conditioner.
The casing 1 of the outdoor unit is composed of a bottom plate 2, a front plate 3 standing upright around the bottom plate 2 to form a peripheral side, a pair of side plates 4 and 5, and a top plate 6, and has a roughly box shape. The entire area is surrounded by A blowout grille 7 is provided on the lower side of the front plate 3. Each of the side plates 4 and 5 is bent into a substantially L-shape when viewed from above, and the long side covers the side surface, and the short side of each side plate 4 and 5 covers the left and right sides of the back surface, respectively. There is. Each of the above side plates 4,
5 is provided with a large number of air inflow ports 8...8 into the casing 1.

On the other hand, inside the casing 1, a partition plate 10 having an L-shaped cross section is arranged. This partition plate 10 is
The horizontal plane, that is, the upper and lower partition plates 11, are screwed onto ribs 13 that are symmetrically formed upright in a V-shape on the front side of the bottom plate 2. At this time, the vertical plane, that is, the front and rear partition plates 12 is front plate 3
is placed vertically so that it is parallel to the

The partition plate 10 allows the inside of the casing 1 to
Heat exchanger chamber 1 between the front and rear partition plates 12 and the back surface
5. It is divided into a machine room 16 above the upper and lower partition plates 11 and between the front and rear partition plates 12 and the front plate 3.
The lower part of the upper and lower partition plates 11 is the heat exchanger chamber 15.
This is a flow path that communicates with the air outlet grille 7 of the front plate 3.

In the heat exchanger room 15, an outdoor heat exchanger 18 and a blower fan 19 are arranged. The outdoor heat exchanger 18 has a pair of substantially L-shaped heat exchangers arranged in a U-shape, and is located at a position facing the air inlet 8 along each side plate 4, 5.
It is placed on a protrusion on the bottom plate 2, which will be described later.
The blower fan 19 has a configuration in which a pair of Sirotskov fans 20 and 21 are attached to drive shafts extending from both end surfaces of a fan motor 22, respectively.
The above-mentioned Shirotsuko fans 20 and 21 are housed in substantially cylindrical fan covers 23 and 24, respectively, and each of the fan covers 23 and 24 has a circular suction port on the end surface and a rectangular suction port in the tangential direction of the cylindrical surface. It has outlet ports 25 and 26.

The blowing fan 19 is attached to a fan mounting plate 27. The fan mounting plate 27 is provided with locking holes 28 at appropriate locations, while the front and rear partition plates 12 have locking pieces 29 that protrude in a gourd shape upward on the side of the heat exchanger chamber 15. However, the locking hole 2
It is formed at a position corresponding to 8. By engaging the locking piece 29 with the locking hole 28, the fan mounting plate 27 is locked along the surface of the front and rear partition plate 12 on the heat exchanger chamber 15 side. At this time, the blower fan 19 is located approximately at the center of the heat exchanger chamber 15, and the outlet ports 25 and 26 of the fan covers 23 and 24 are connected to the heat exchanger of the V-shaped rib 13 of the bottom plate 2. Exchange room 15
It is located at a position that matches the rectangular shape surrounded by the side end surfaces, the upper and lower partition plates 11, and the upper surface of the bottom plate 2. Further, in the machine room 16 above the upper and lower partition plates 11, equipment components required for the refrigerant circuit, such as a compressor 30 and an accumulator, are arranged.

An opening 31 is provided in the central region of the bottom plate 2 on the heat exchanger chamber 15 side so that the blower fan 19 can be taken in and out of the casing 1 from the bottom surface with the fan 19 attached to the fan mounting plate 27. There is. A service lid 32 is attached to this opening 31. An electrical component box 34 that stores electrical components is attached to a rib 33 that is integrally formed on the inner surface of the service lid 32, so that the device can be left hanging from the ceiling. Then, by removing the service lid 32,
The electrical component box 34 can be taken out of the machine, and the fan 19 can also be easily taken out of the machine, so that inspection and repair work can be carried out quickly. The structure for attaching the service lid 32 to the opening 31 will be described in detail later.

On the other hand, a drain receiver 37 is integrally formed on the bottom plate 2. That is, on the bottom plate 2, which is substantially parallel to the top plate 6, where the outdoor heat exchanger 18 is located, that is, on both side surfaces and the back side, an outer protruding edge 35 protruding upward is formed on the outer peripheral edge thereof. , an inner protruding edge 36 that also protrudes upward from the periphery, that is, the inner periphery, of the opening 31 in the central region.
is formed, and the above-mentioned rib 13 is located on the front plate 3 side so as to also serve as a part of the outer protruding edge 35, so that the entire periphery is surrounded by the upper protruding edge. It is shaped like a saucer and is formed as a drain receiver 37. The outdoor heat exchanger 18 is located on this drain receiver 37, and the receiving surface of the drain receiver 37 has protrusions 38 formed at appropriate locations, and the outdoor heat exchanger 18 is placed on these protrusions 38. 18 is positioned and placed. Therefore, the outdoor heat exchanger 1
A space corresponding to the height of the protrusion 38 is provided between the lower surface of the drain receiver 37 and the receiving surface of the drain receiver 37, so that the drain water accumulated on the drain receiver 37 can freely flow to the lower side. It is done like this. There are three positions on the back side of the receiving surface of the drain receiver 37: a central location and symmetrical locations on both side surfaces.
A drain hole 39 is bored at the location. The lower part of the drain hole 39 is covered with the service lid 32, which has a concave saucer shape that protrudes downward, and the lowermost center of the receiving surface is covered with the service lid 32. A drain port 40 is drilled to communicate with a drain hose attachment pipe (not shown) provided on the lower surface side.

On the other hand, when installing the above device on the ceiling,
In recent years, anchor bolts for mounting equipment on the ceilings of apartments and other balconies have begun to be formed, so it is necessary to have mounting holes that match the arrangement of the anchor bolts mentioned above and to have a U-shaped cross section. Two members, that is, hanging metal fittings 45 are prepared. Each of the hanging fittings 45 has a length exceeding the width of the casing 1, that is, the length between the side plates 4 and 5, and both ends are formed in a square shape as shown in FIG. After horizontally inserting the horizontal mounting surface 47 of the mounting bracket 46 through the side notch and bringing the horizontal mounting surface 47 into contact with the metal mounting surface. , and are fixed with bolts or the like.

The mounting brackets 46 are arranged at each of the four corners of the top plate 6 as shown in FIG.
The above-mentioned hanging metal fitting 45 is attached to the above-mentioned horizontal mounting surface 47.
A through hole for tightening bolts is formed on the vertical surface side, and a female thread 48 and a claw-like locking piece 49 projecting upward and outward are formed. On the other hand, the side plates 4 and 5 of the casing 1 are provided with engaging portions, that is, mounting holes 50 and 52, which can be engaged with the locking pieces 49 of the mounting bracket 46, at positions close to the four corners of the top plate 6. Further, a bolt hole 51 is bored at the location where the female thread 48 is located in a pair with the mounting holes 50 and 52. Note that the side plate 5 shown in FIG. 3 has two pairs of mounting holes 50, 52 and bolt holes 51 on the front plate 3 side and the back side, respectively, but these are used for anchor bolts formed on a balcony etc. This is to enable installation according to the mounting pitch of the
Can be installed on a 500mm anchor bolt,
The inner pair can be installed with a pitch of 400mm.

The mounting holes 50 and bolt holes 51 on the front plate 3 side are located approximately 5 mm below the upper sides of the side plates 4 and 5, that is, the distance from the top plate 6, than the mounting holes 52 and bolt holes 51 on the rear side. Holes are drilled in each location.

Next, the installation work of the outdoor unit having the above structure on a ceiling surface of a balcony or the like will be explained. First, the hanging metal fittings 45 are attached to the anchor bolts on the ceiling surface. On the other hand, the mounting bracket 46 is attached to the casing 1. As mentioned above, select the mounting hole according to the pitch of the anchor bolt, and insert the mounting bracket 46 insertion opening provided at the four corners of the top plate 6. After inserting the vertical side of the mounting bracket 46 into the casing 1 and exposing the claw-shaped locking pieces 49 to the outside of the machine through the mounting holes 50 and 52, insert the mounting hole into the base end of the locking piece 49. Pull up so that the upper sides of 50 and 52 are in contact with each other, and at this position, screw the bolt into the female screw 48 through the bolt hole 51. At this time, all the mounting fittings 46 have the same shape, and there is no distinction between the front plate 3 side and the back side, so that the above work can be easily performed. Next, lift the casing 1 and insert the horizontal mounting surface 47 of each of the mounting fittings 46 onto the fitting mounting surface through the side notch at the end of the hanging fitting 45 so that they are in contact with each other. Hanging bracket 45
Complete the installation work by securing it with bolts from the bottom side. In this state, as mentioned above, the mounting holes 50 and bolt holes 51 on the front plate 3 side are provided at a distance of about 5 mm lower from the top plate than the mounting holes 52 and bolt holes 51 on the back side. This results in an inclined state in which the back side is inclined downward. This angle of inclination is very small, less than 1 degree, and is almost indistinguishable from the outside appearance, so it does not cause any discomfort, and each of the metal fittings 4
Since numerals 5 and 46 are located on the top side of the device, they do not impair the beauty of the bottom side, which is required in a ceiling hanging type.

Next, the operating state of the device having the above configuration will be explained. When the above device is activated, the fan motor 2
When the Sirotskov fans 20, 21 are rotationally driven by the air filters 2, the pressure inside the heat exchanger chamber 15 becomes lower than the atmospheric pressure outside the casing 1. Outside air flows into the casing 1 through 8. The air that has flowed into the casing 1 first flows into the heat exchanger chamber 15 through the outdoor heat exchanger 18 that is disposed close to the air inlet 8 . At this time, during indoor cooling operation, the refrigerant condensation heat is absorbed from the outdoor heat exchanger 18, and during heating operation, the outdoor heat exchanger 1
Heat exchange is performed to give heat of evaporation to 8.

The incoming air, which has undergone heat exchange as described above, is sucked into the Sirotskov fans 20 and 21 and flows out from the outlet ports 25 and 26 of the fan covers 23 and 24. From the outlet ports 25, 26 to the front plate 3, a guide channel is formed by the upper and lower partition plates 11 as described above.
The air discharged from the front panel 6 passes through the guide passage and is discharged to the outside of the casing 1 from a blow-off grille 7 provided on the lower side of the front plate 3.

In the above operating state, especially the outdoor heat exchanger 18
During indoor heating operation in which the outdoor heat exchanger 18 acts as an evaporator, the outside air passing through the outdoor heat exchanger 18 has a low temperature, so that moisture in the atmosphere condenses and passes through the outdoor heat exchanger 18 to the outdoor air. heat exchanger 1
8 drip into the drain receiver 37 at the bottom. Since the drain receiver 37 is sloped so that the back side is lower as described above, the drain water flows over the drain receiver 37 to the back side, and then from the drain hole 39 on the back side. It falls into the service lid 32 at the bottom and is further discharged to the outside of the machine through the drain port 40. in this way,
Since the inside of the machine is provided with a flow path that allows drain water to always flow to the lower side, no drain water remains inside the machine. There will be no dripping from other gaps, and the occurrence of corrosion due to residual water will be reduced.

By the way, in the above device, even if the drain hole 39 is blocked for some reason and the drain water cannot be properly discharged to the outside of the machine, the drain water can be drained from the attachment part of the service lid 32. The following structure is in place to prevent leakage outside the machine. 1 and 2 show cross-sectional views of the attachment portion of the service lid 32. FIG. As shown in FIGS. 1 and 2 and the above-mentioned FIG. The bottom plate 2 protrudes toward the
A protruding edge 53 for attachment is formed on the lower surface 56 side of the holder. In this case, the positioning protruding edge 52
As shown in FIG.
is formed over the entire length of the service lid 32 in the front-rear direction. On the other hand, the bottom plate 2 has an inner surface 5 of the inner protruding edge 36 near the peripheral edge of the opening 31.
4 is formed with a first step portion 55 into which the positioning projecting edge 52 fits, and a second step portion 57 into which the mounting projecting edge 53 fits is formed on the lower surface 56 thereof. Further, a third step portion 65 is formed in the vicinity of the outer peripheral edge of the bottom plate surface 56, into which the lower end bent edge 64 of the side plates 4, 5 is fitted. In the above, when the first step part 55 is fitted with the positioning protrusion edge 52, the inner surface 54 of the inner protrusion edge 36 is closer to the opening 3 than the inner surface 58 of the positioning protrusion edge 52.
The dimensions are set so that it protrudes to the side by an appropriate length 59. By the way, as shown in FIG. 3, a stepped portion 60 is formed at the intermediate portion of the mounting protruding edge 53 in the front-rear direction. This is to make the rear side come into contact with the rear bottom plate lower surface 56 when fitted. Furthermore, in this embodiment, the means for detachably attaching the protruding edge 53 for attaching to the opening 31 is as follows.
The case where the screws 66...66 are used is taken as an example, but in this case, each screw insertion part 61...61 of the protruding edge 53 for attachment is formed in a convex shape that protrudes upward, and the above-mentioned screws are provided on the bottom plate 2 side. Convex screw insertion part 61...6
Cap nut portions 62...6 each having a recess into which the nut can be inserted.
2 are integrally formed. In other words, they are designed to be easily aligned and to prevent drain water from leaking from the screwed portion. At the front peripheral edge of the service lid 32,
A plurality of protrusions 63, 63, 63 are formed to protrude forward. The protrusions 63, 63, 63 are latched onto the bottom plate 2 at the periphery of the opening 31, and when latched, the respective ribs 13 intersect with the protrusion 63.
The structure is located between 3 and 3.

In the above service lid mounting structure, when installing the service lid 32 to the opening 31, first insert and lock the protrusions 63, 63, 63 of the service lid 32 into the upper part of the periphery of the opening 31 of the corresponding bottom plate 2,
From this state, lift the rear end side of the service lid 32 and place the positioning protruding edge 52 on the first step 55 of the bottom plate 2.
It will fit and go. As a result, the mounting position of the service lid 32 is approximately determined, and at the same time as the fitting of the positioning protruding edge 52 to the first step portion 55 is completed, the second step portion 5
7, the protruding edge 53 for attachment will fit therein. Therefore, the screws 66...66 are inserted from below into each screw insertion portion 61 of the protruding edge 53, and the cap nut portion 62
…Screw into 62. This completes the attachment of the service lid 32 to the opening 31.

By the way, in the above, the drain receiver 3 of the bottom plate 2
The drain water that has accumulated on 7 is removed from each drain hole 39.
through the service lid 32 and drain port 40.
However, even if a situation occurs where the drain hole 39 is blocked for some reason and the drain water cannot be drained out of the machine properly, the service This will prevent drain water from leaking from the lid attachment part. That is, when the service lid 32 is attached to the opening 31 as described above, the inner surface 54 of the inner protruding edge 36 of the bottom plate 2 is aligned with the inner surface 58 of the positioning protruding edge 52.
Since the water protrudes toward the opening 31 side, the drain water overflows the inner protruding edge 36 and flows toward the opening 31.
Even if drain water flows inside, the drain water flowing along the inner surface 54 of the inner protruding edge 36 falls directly onto the service lid 32, and the drain water flows between the upper surface of the positioning protruding edge 52 and the lower surface of the first step 55. It is possible to prevent the water from flowing into the gap formed in the gap. Furthermore, even if some of the drain water flowing into the opening 31 were to enter the space between the bottom plate 2 and the service lid 32, the amount would be very small, and the leakage route would be smaller than before. Since this is long, it is possible to prevent this from leaking out of the machine. Therefore, according to the above-mentioned service cover mounting structure of the ceiling-suspended air conditioning unit, even if a situation occurs where the drain water accumulated on the drain receiver 37 cannot be properly discharged to the outside of the machine, the service cover can be attached. This makes it possible to prevent drain water from leaking from the mounting portion. In addition, the above mounting structure not only allows leakage of drain water, but also seals the air between the inside and outside.
Another advantage is that there is no need to use a lot of packing and sealing materials.

Note that the above embodiments do not limit this invention, and various changes can be made within the scope of this invention. For example, in the above embodiment, the positioning protruding edge 52 and the attachment protruding edge 53 are formed on a part of the periphery of the service lid 32, but these protruding edges 52 and 53 are formed on the entire periphery. It may be formed over the circumference, and the inner and outer protruding edges 36 and 35 of the bottom plate 2 may also be formed over the entire circumference of both the inner and outer peripheral edges. In other words, in the above embodiment, the drain receiver 37 has a substantially U-shaped planar shape, but the same function and effect can be obtained in preventing leakage of drain water even if the drain receiver 37 has a square-shaped shape. Furthermore, in the above embodiments, an outdoor unit was taken as an example of a ceiling-suspended air conditioning unit, but it is clear that the invention can also be applied to an indoor unit.

(Effect of the invention) As explained above, in the service lid mounting structure of the ceiling-hung air conditioning unit of this invention, when the service lid is installed in the opening, the inner surface of the inner protruding edge formed on the bottom plate Since the protruding edge for positioning formed on the lid is designed to protrude toward the opening side from the inner surface, if the drain water collected on the drain receiver cannot be properly discharged to the outside of the machine, Even if this occurs, the drain water that overflows the inner protruding edge and flows into the opening can be prevented from falling directly onto the service lid and entering the gap between the bottom plate and the service lid. Furthermore, even if some of the drain water that leaked out were to enter the above-mentioned space, the amount would be very small and the leakage route would be long, so it would not leak out of the machine as it is. . Therefore, in the above mounting structure, leakage of drain water from the service lid mounting portion can be reliably prevented. Furthermore, when installing the service lid, the positioning can be done easily and accurately, so there is an effect that the installation work can be made easier.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the service cover mounting structure of the ceiling-suspended air conditioning unit of this invention.
Figures 1 and 2 are sectional views of the service lid mounting section, Figure 3 is an exploded perspective view showing the overall configuration of the outdoor unit, and Figure 4 is an explanatory diagram of a service lid mounting structure that can be derived using conventional technology. . 2... Bottom plate, 31... Opening, 32... Service lid, 35... Outer protruding edge, 36... Inner protruding edge,
37...Drain receptacle, 52...Protruding edge for positioning, 53...Protruding edge for attachment, 54...Inner surface of inner protruding edge, 55...First step part, 56...Bottom plate bottom surface, 57...No. 2nd step part, 58...inner surface of the protruding edge for positioning.

Claims (1)

[Scope of utility model registration request] This is a structure for attaching a service lid 32 to an opening 31 provided in a bottom plate 2 of a ceiling-suspended air conditioning unit, and includes a positioning protrusion 52 that protrudes upward from the periphery of the service lid 32 and fits into the opening 31.
and an attachment protruding edge 53 that protrudes laterally and is attached to the lower surface 56 of the bottom plate 2, while an inner protruding edge 36 that protrudes upward at the periphery of the opening 31 of the bottom plate 2. At the same time, an outer protruding edge 35 that protrudes upward is formed at a position outside of the inner protruding edge 36, so that both protruding edges 36, 3
5, and a first step portion 55 in which a positioning protruding edge 52 of the service lid 32 fits into a position near the opening 31 of the bottom plate 2;
and a second step portion 57 into which the mounting protrusion edge 53 of the service lid 32 is fitted, and the first step portion 55 is formed with the inner protrusion when the positioning protrusion edge 52 is fitted. A service lid mounting structure for a ceiling-suspended air conditioning unit, characterized in that the inner surface 54 of the edge 36 is dimensioned so as to protrude more toward the opening 31 than the inner surface 58 of the positioning protruding edge 52.