JP3141857B2 - Duct connection structure and connection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure and a connection method between an air conditioner body such as an air conditioner and a duct.

[0002]

2. Description of the Related Art As the above-mentioned air conditioner, for example, an apparatus main body including a blower and the like, an air outlet unit for blowing air flow from the apparatus main body into a room, Some include an inlet unit that sucks in air, an air supply port and an exhaust port that are provided facing the outside, and a duct that connects these components.

[0003] The connection structure between the duct and the apparatus main body is configured in the same manner as the connection structure between the ducts. That is, a tubular portion as a joint is formed integrally with the casing of the apparatus main body. This tubular portion has the same shape as the end of the duct. The size of the tubular portion is set in advance according to the capacity of the apparatus main body, and a duct corresponding to the size of the tubular portion can be connected. The end of the duct and the cylindrical portion are connected in the same manner as in the case of the ducts. Thus, the only ducts that can be directly connected to the apparatus main body are those of a preset size.

In some cases, it is desired to use a duct having a size different from the previously set size. For example, there is a case where it is desired to enhance the aesthetic appearance of a building by narrowing a duct connected to an air supply port provided on a wall surface of the building. Also, when the duct crosses below the beam of the building, it may be desirable to use a small duct depending on the gap below the beam. Also, if the lengths of the ducts to multiple outlets are different,
You may want to increase the cross-sectional area of the longer duct to balance airflow resistance.

[0005] When the size of the duct is changed in this way, an intermediate duct is interposed between the tubular portion of the apparatus main body and the duct of the changed size, and these are connected. One end of the intermediate duct is formed in a size connectable to the cylindrical portion of the apparatus main body, and the other end is formed in a size connectable to the duct. When this intermediate duct is interposed, installation tends to be difficult if the installation space is narrow. As a result, if the installation space is small, the duct cannot be connected to the apparatus main body depending on the size of the duct.

Accordingly, an object of the present invention is to solve the above-mentioned technical problems, and to provide a duct connection structure and a connection method which can connect a plurality of ducts having different sizes to an apparatus main body alternatively and without using an intermediate duct. It is to provide.

[0007]

In order to achieve this object, a connecting structure according to the first aspect of the present invention is a structure for selectively connecting a plurality of types of ducts having different sizes to an air conditioner body. Te, connecting the respective ducts directly, respectively
A plurality of types of ducts joint, provided in the casing of the air conditioner main body, a plurality conform to a plurality of types of ducts to be connected
An alternative direct connection of a type of duct joint, the joint connection being provided on the periphery of the ventilation opening of the casing.
And a fitting portion that is distributed and arranged surrounding the.

According to this configuration, by changing the duct joint in accordance with the duct, it is possible to selectively connect the ducts having different sizes to the casing of the apparatus main body, and it is not necessary to use the intermediate duct. As described above, since it is not necessary to use the intermediate duct, the duct can be installed in a small space. As a result, the range of connectable ducts can be expanded in the case of installing in a narrow space.

A connection structure according to a second aspect of the invention is characterized in that, in the connection structure according to the first aspect, a plurality of the joint connection portions are provided according to a duct joint to be connected. . According to this configuration, in addition to the effect of the invention described in claim 1, different duct joints can be respectively connected to the plurality of joint connection portions, so that the range of connectable ducts is further expanded. Can be.

According to a third aspect of the present invention, in the connection structure according to the first or second aspect, the joint connecting portion is a single joint connection capable of selectively connecting a plurality of duct joints. It is characterized by including a part. According to this configuration,
In addition to the effect of the invention described in claim 1 or 2, since a plurality of duct joints can be selectively connected to a single joint connecting portion, the range of connectable ducts can be further expanded.

According to a fourth aspect of the present invention, in the connection structure according to any one of the first to third aspects, the joint connection portion and the duct joint are hooked and engaged with each other. . According to this configuration, in addition to the operation of the invention described in any one of the first to third aspects, the duct joint and the casing can be easily connected by hooking engagement.

According to a fifth aspect of the present invention, in the connection structure of the fourth aspect, the duct joint includes a hook portion, and the fitting portion of the joint connecting portion hooks and engages the hook portion. It is characterized by including an engagement hole. According to this configuration, in addition to the effect of the invention described in claim 4, a simple structure of the engagement hole and the hook portion can be provided.

[0013] The connection method of the invention according to claim 6 is the above-mentioned connection method.
The duct connection structure according to claim 1 is provided.
The different ducts sizes to the air conditioner body kicked a method of selectively connected, after conforming duct joint duct is connected directly connected to the joint connecting portion of the casing of the air conditioner main body, It is characterized in that the duct is directly connected to the duct joint. According to this method, by changing the duct joint according to the duct, a plurality of ducts having different sizes can be alternatively connected to the apparatus main body, and the intermediate duct can be omitted.

Further, since it is not necessary to use an intermediate duct, the duct can be installed in a narrow space. As a result, in the case where the duct is installed in a narrow space, the range of connectable ducts can be expanded. Further, since the duct joint to which the duct is not connected is connected to the casing, the duct joint is easy to handle, and the connection between the duct joint and the casing is easy.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An air conditioner having a duct connection structure according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of an air conditioner according to an embodiment of the present invention. The air conditioner 1 is of a ceiling-mounted type, for example, a ceiling-embedded type. The air conditioner 1 includes an air conditioner main body (hereinafter, referred to as an “apparatus main body”) 2 for generating a flow of air supply from the outside to the room and an exhaust flow from the room to the outside, and an air supply port 3 facing the outside. An air supply duct 7 that allows air from the air to flow into the apparatus main body 2;
Blow-out duct 8 that blows out the blown-out airflow from the outlet unit 5 that faces the room, suction duct 9 that flows the air from the suction unit 6 that faces the room to the device body 2, and the device body 2
And an exhaust duct 10 for connecting the exhaust port 4 to the outside. These components form an exhaust air passage from indoor to outdoor and an air supply air passage from outdoor to indoor.

The apparatus main body 2 is partitioned into internal air passages through which air supply (see arrow F1) and exhaust air (see arrow F2) pass, and heat is exchanged between the air supply and the exhaust. A heat exchanger 21, blowers 22 and 23 for flowing air through an air supply passage and an exhaust air passage, and the like are provided in a casing 24. Each of the above-described ducts is connected to the apparatus main body 2 one by one. The connection structure S is applied to a portion connecting the device main body 2 and each duct.

Hereinafter, a detailed description will be given of a connection structure between the apparatus main body 2 and an outlet duct (hereinafter referred to as a "duct") 8 as an example. FIG. 2 is an exploded perspective view of the apparatus main body and the duct. The connection structure S is a structure for selectively connecting ducts having different sizes to the apparatus main body 2. The connection structure S includes a duct joint (hereinafter referred to as a “joint”) 2 for directly connecting the duct 8.
5 and a joint connecting portion 24e to be described later for directly connecting a joint 25 adapted to the duct 8 provided and connected to the casing 24 of the apparatus main body 2. Fitting 25
Communicates with each other while being interposed between the casing 24 and the duct 8. There are a plurality of types of the joints 25 according to the size of the duct 8.
Seeds are selected. The selected joint 25 and the joint connection portion 24e of the casing 24 are connected, and the above-described duct 8 is directly connected to the joint.

The duct 8 is formed, for example, in a cylindrical shape having a predetermined inner diameter. FIG. 2 illustrates four types of ducts 8A, 8B, 8C, and 8D. The inner diameter dimension of the duct 8A, the duct 8B, the duct 8C and the duct 8D increases in this order. A joint 25 corresponding to each duct is connected to the end 8 a of each duct 8. Duct 8A has joint 25A, duct 8B has joint 25B, duct 8C has joint 25C, and duct 8
D is connected to a joint 25D.

As shown in the side sectional view of FIG. 5, the joint 25A has a flange-like portion 25 at an end near the casing 24.
It is a resin cylindrical member having a. One end 25b of the joint 25A has a first connection portion 25d provided corresponding to the duct A and connected to the duct A, and the other end 25c of the joint 25A.
Has a second connection portion 25e that is connected to only the casing 24.

The first connection portion 25d is formed in a cylindrical shape with a tapered outer peripheral surface. The taper of the first connection portion 25d is a tapered surface 25 as an introduction portion provided near the tip.
f, and a tapered surface 25g that is connected to the tapered surface 25f and an end edge of the duct A is in contact with.
The part on one side of the duct is inclined at different angles to make it thinner. From the tapered surface 25g of the first connecting portion 25d, the inner diameter gradually increases, and the flange-like portion 25
a.

The second connecting portion 25e is connected to the flange-like portion 25
a annular projection 25h on the end face
A hook portion 25i and an insertion hole 25j (see FIG. 4) provided radially outwardly. Annular protrusion 2
5h is in contact with the side surface 24a of the casing 24 so as to surround the entire periphery of the opening 24b of the casing 24 to seal the space between the side surface 24a of the casing 24 and the joint 25A.

As shown in FIG. 9, the hook portion 25i is a protruding portion provided on the end face of the flange portion 25a. At the tip of the hook 25i, a hook protruding outward in the radial direction is formed. This hook portion and the peripheral portion of the engagement hole 24i of the joint connection portion 24e of the casing 24
The joint 25A and the casing 24
Are connected. In addition, an opening 25m for forming a hook portion is formed outside the radial direction of the base of the hook portion 25i.

The insertion hole 25j is for inserting a screw (not shown) for fixing the joint 25A to the casing 24. In addition, the fixing using this screw is performed in the joint 2
5A hook part 25i and joint connection part 2 of casing 24
This is used when the engaging hole 24i of 4e cannot be sufficiently engaged. The joint 25B is a cylindrical member having a flange-like portion 25a at an end near the casing 24, as shown in FIG. One end 25b of the joint 25B has a first connection portion 25d provided corresponding to the duct B and connected to the duct B, and the other end 25c of the joint 25B has a second connection portion 25e connected to only the casing 24. ing. First connection part 2
5d includes two tapered surfaces 25f and 25g corresponding to the duct B similarly to the joint 25A. The second connection portion 25e has an annular protrusion 25h, a hook portion 25i, and an insertion hole 25j, similarly to the joint 25A.

As shown in FIG. 7, the joint 25C is a tubular member having a flange-like portion 25a at an end near the casing 24. One end 25b of the joint 25C has a first connection portion 25d provided corresponding to the duct C and connected to the duct C, and the other end 25c of the joint 25C has a second connection portion 25e connected to only the casing 24. ing. The first connection portion 25d includes two tapered surfaces 25f and 25g corresponding to the duct C, similarly to the joint 25A. The second connection portion 25e has an annular protrusion 25h, a hook portion 25i, and an insertion hole 25j, similarly to the joint 25A.

The hook 25i and the insertion hole 25j of the second connecting portion 25e are connected to the joint 25A, the joint 25B and the joint 2A.
5C, the same shape is provided at four places, and the joints are arranged in the same manner.
Can be connected to one joint connecting portion 24f described later. The joint 25D is, as shown in FIG.
It is a cylindrical member having a flange-like portion 25a at the end near the fourth side. One end 25b of the joint 25D has a first connection portion 25d provided according to the duct D and connected to the duct D,
The other end 25c of the joint 25D has a second connection portion 25e connected to only the casing 24. 1st connection part 25d
Includes two tapered surfaces 25f and 25g corresponding to the duct D similarly to the joint 25A. Also, the second connection unit 25
e is an annular projection 25h and a hook 2 similar to the joint 25A.
5i and an insertion hole 25j.

The hook portion 25i and the insertion hole 25j of the second connection portion 25e of the joint 25D have the same shape as that of the joint 25A, but are provided at six locations and have different arrangements.
It is connected to the other joint connection portion 24g of the casing 24 provided separately from the joint connection portion 25f to which the joint 25A is connected. The casing 24 is formed of, for example, a rectangular parallelepiped box, and is formed of a sheet metal material. Casing 2
An opening 24b is formed in the side surface 24a of the fourth, and a chamber 2a (see FIG. 1) which forms a part of the internal air passage is defined at the back of the opening 24b. FIG. 2 shows an opening 24 b for the outlet duct 8 and an opening 24 c for the suction duct 9. These openings are provided with joint connecting portions 24e for connecting to the second connecting portions 25e of the joint 25.

The joint connecting portion 24e is connected to a joint 25 to be connected.
A plurality is provided according to. That is, as shown in FIG. 3, two sets are provided for one opening, and joints 25 having different sizes can be connected to the respective joint connection portions 24e. That is, one joint connection portion 24f
Can be selectively connected to a plurality of joints having different sizes, and can be connected to any one of the joints 25A, 25B, and 25C. The other joint connection part 24g can be connected to the joint 25D.

One joint connecting portion 24f has a plurality of, for example, four rectangular engaging holes 24i, and a plurality of, for example,
And four female screw holes 24j. Engagement hole 24i
Are hooked and engaged with the hook portions 25i of the second connection portions 25e of the joints 25A, 25B, and 25C. The female screw hole 24j is provided for the joint 25A, the joint 25B, and the joint 25C.
A screw passing through the insertion hole 25j of the second connection portion 25e is screwed. These engagement holes 24i and female screw holes 24j
Is provided outside the internal air passage in the casing 24.

The other joint connecting portion 24g has a plurality of, for example, six rectangular engaging holes 24i and a plurality of, for example,
And six female screw holes 24j. The other joint connecting portion 24g corresponds to the second connecting portion 25e of the joint D. The engagement hole 24i is provided in the hook 25i of the joint 25D.
And engage with each other. The female screw hole 24j is
A screw that passes through the 5D insertion hole 25j is screwed.

Further, the joint connecting portion 24 serving as the mount center
e and the opening 24b are offset from each other, for example,
They are arranged offset vertically. Thus, when the opening 24b of the casing 24 is vertically offset from the side surface 24a of the casing 24, the joint 25 suitable for the large-sized duct is connected to the joint connecting portion 24e of the casing 24. be able to.

Further, in the joints 25A and 25B, the center of the first connecting portion 25d, which is the center of the duct, and the center of the second connecting portion 25e, which is the center of the mount, are offset from each other, for example, by offset in the vertical direction. It is arranged. In such a case, when the joints 25A and 25B are rotated and attached, it is assumed that the height positions of the ducts 8A and 8B connected to the joints 25A and 25B change. Therefore, the connection structure S is provided so that each joint 25 can be attached to the joint connection portion 24e only at a regular position.
Is provided with means for preventing erroneous attachment of the joint. Thereby, the duct 8 can be installed at a predetermined height position. In addition, when the opening 24b, which is arranged offset as described above, is viewed from the opposite direction, the opening 24b and the cross section of the particularly small duct 8 can be arranged so as to have a large overlap.

The means for preventing erroneous mounting includes the hook 2 of the joint 25.
This is realized by the arrangement of 5i. That is, when it is at the regular position, the hook portion 25i of the joint 25 and the engaging hole 24i of the joint connection portion 24e of the casing 24 correspond one-to-one. At least one hook portion 25i is arranged so as not to correspond to the engagement hole 24i and not to enter the engagement hole 24i.

For example, the six engagement holes 24i of the other joint connecting portion 24g are arranged on the same circumference.
Five of the pieces are located at equal angular positions, and the other one is located at an angular position deviated from the equal angular position.
Also, the joint D is fixed so that it can be locked in these engagement holes 24i.
Are also arranged. Therefore, when it is at a predetermined regular angular position, all joints 25
The hook portion 25i of D can engage with the engagement hole 24i of the other joint connection portion 24g of the casing 24,
On the other hand, when it deviates from the regular angle position, the joint 25D
Of the hook portions 25i do not enter the engagement holes 24i,
The joint 25D cannot be attached to the casing 24. The six female screw holes 24j of the other joint connection portion 24g and the insertion holes 25j of the joint 25D are similarly arranged. In the engagement between the screw passing through the insertion hole 25j and the female screw hole 24j, all the insertion holes 25j of the joint 25D are only provided at a predetermined regular angular position.
Is screwed into the female screw hole 24j and can be properly mounted. On the other hand, if the screw is out of the regular angle position, there are screws that cannot be fixed, and it can be seen that the screw is out of the regular position. ing. In addition, one joint connecting portion 24f and the corresponding second connecting portion 25e of the joint 25 are similarly arranged.

The air conditioner 1 is installed as follows. First, the joint 25 corresponding to the duct 8 is selected. For example, when the duct A is used, the joint 25A
Is selected. The hook 25i of the second connecting portion 25e of the joint 25A is engaged with the engaging hole 24i of the joint connecting portion 24e of the casing 24. At this time, the hook 25
i is pushed into the engagement hole 24i, and when the end surface of the joint 25 comes into contact with the side surface 24a of the casing 24, the hook 2
5i and the engaging hole 24i are hooked, and the engagement is completed. During this time, the hook portion 25i is elastically deformed radially inward while the slope formed radially outward of the hook portion of the hook portion 25i and the peripheral edge of the engagement hole 24i extend along the hook portion 25i. Smoothly enters the engagement hole 24i. After the engagement, the engagement is reliably maintained by the elastic restoring force of the hook portion 25i.

As described above, since the joint 24 can be easily connected by hooking engagement, the above-described steps can be performed before or after the apparatus main body 2 is installed in the space above the ceiling. Next, the inner peripheral surface of the end 8a of the duct A is introduced into the outer periphery of the tapered surface 25g of the first connection portion 25d of the joint 25A, and is connected by being brought into contact therewith. This connection is performed in the same manner as the conventional connection method between ducts. Further, if necessary, sealing with a sealing member and heat insulating treatment with a heat insulating material are performed.

As described above, according to the present embodiment, in the connection structure S, the joints 25 are replaced according to the ducts 8, and the ducts 8 having different sizes are selectively used for the casing 24 of the apparatus main body 2 and the conventional one. Connection can be made without using an intermediate duct. As described above, since it is not necessary to use the conventional intermediate duct, it can be installed in a narrow space. As a result, the range of ducts that can be connected when installed in a small space can be increased.

Further, a plurality of joint connecting portions 24f, 24g
In addition, since the different joints 25 can be connected to each other, the range of the connectable duct 8 can be further expanded.
In addition, since the plurality of joints 25 can be alternatively connected to the single joint connecting portion 24f, the range of the duct 8 that can be connected can be further expanded. Further, since the joint 25 and the casing 24 can be easily connected by hooking engagement between the hook portion 25i and the engagement hole 24i, it is preferable for connection at the installation site of the air conditioner.

The hook 25i of the joint 25 and the engaging hole 24i of the casing 24 have a simple structure, and the hook 25i of the resin joint 25 is particularly easy to form.
Further, the second connecting portion 25 e of the joint 25 is
Since it is only necessary to deal with only the counterpart, an arbitrary structure can be obtained. As a result, a structure that can be easily connected to the casing 24 can be obtained, and the connection can be easily made even at the installation site.

Further, since the second connecting portion 25e of the joint 25 faces the casing 24, the second connecting portion 25e can be made thinner than the connecting structure facing the duct. As a result, when the joint is integrally formed with the casing. Even when compared, the external dimensions can be substantially the same. In addition, the connection between the joint 25 and the casing 24 is provided with connecting means by means of a screw and a female screw hole 24j in addition to the connecting means by means of the hook portion 25i and the engaging hole 24i. It can be fixed and sealed.

In addition to the air conditioner having the above-described configuration, the following connection method may be used. That is, this connection method is a method of selectively connecting ducts 8 having different sizes to the apparatus main body 2, and a joint 25 that fits the duct 8 to be connected is connected to the joint connection portion 24 e of the casing 24 of the apparatus main body 2. Then, the duct 8 may be directly connected to the joint 25. According to this method, by changing the joint 25 according to the duct 8, a plurality of ducts 8 having different sizes are provided.
Can be alternatively connected to the apparatus main body 2, and
It is not necessary to use a conventional intermediate duct. Therefore, when installing in a narrow space, the range of the duct 8 that can be connected can be expanded. Further, since the joint 25 to which the duct 8 is not connected is connected to the casing 24, the joint 25 is easy to handle, and the connection between the joint 25 and the casing 24 is easy.

As described above, according to the present invention, the ducts 8 having different sizes can be connected to the apparatus main body 2 without using the intermediate duct. It can be used even if it cannot be connected. As a result, an appropriate size duct 8 can be selected according to the installation condition of the air conditioner 1.

The following effects can be obtained by expanding the range of selection of the duct 8. For example, the air supply port 3 and the exhaust port 4 of the present air conditioner 1 and the grills and the like of other devices provided on the outer wall of the building can be made the same size to improve the appearance of the building. In this case, even when the apparatus main body 2 is approaching the outer wall, the air supply port 3 and the exhaust port 4
Can be selected in a wide range. Further, when the duct is passed under the beam of the building, it is easy to use a duct having a size corresponding to the space there. When a long duct is used, the pressure loss tends to increase. In such a case, the pressure loss can be reduced by using a duct having a large cross section.

When a duct having a size that does not fit in the air conditioner body is used, the conventional intermediate duct is not used, and the air conditioner 1 can be made inexpensive. The difference in the sizes of the above-mentioned ducts includes not only a case where the cross-sectional area of the duct is different but also a case where the cross-sectional shape and the end shape of the duct are different. The above-described casing 24 has a joint connecting portion 24f connectable to a plurality of joints 25 having different sizes and a joint connecting portion 24g connectable to a joint 25 having a single size. Not limited. For example, only the above-described joint connection portion 24f may be provided, a plurality of sets of joint connection portions 24g may be provided, or a plurality of sets of joint connection portions 24f may be provided.

The above-mentioned casing 24 is provided with a joint 25.
Is mounted at a predetermined angular position, but is not limited to this. For example, when it is not necessary to align the opening of the casing 24 with the end of the duct, the hook 25i and the engaging holes 24i can be arranged on the circumference at equal intervals, thereby simplifying the structure. it can. In addition, the first connection portion 25d of the joint 25 is not limited to the above-described tapered cylindrical shape, and a connection structure implemented between ducts can be used.

The connection between the joint 25 and the casing 24 can be made by using a hook 25i and an engagement hole 24i, or by using a screw and a female screw hole 24j, or by using a structure for fixing a pair of members. In addition, various design changes can be made without changing the gist of the present invention.

[0046]

According to the first aspect of the present invention, a plurality of ducts having different sizes are selectively connected to the apparatus main body by alternatively directly connecting a duct joint corresponding to the duct to the apparatus main body. And connection can be made without using an intermediate duct.
In addition, since it is not necessary to use an intermediate duct, the range of connectable ducts can be widened when installing in a narrow space.

According to the invention described in claim 2, according to claim 1,
In addition to the effects of the invention described in above, different duct joints can be respectively connected to the plurality of joint connection portions, and the range of connectable ducts can be further expanded. According to the invention described in claim 3, in addition to the effects of the invention described in claim 1 or 2, a plurality of duct joints can be alternatively connected to a single joint connection portion, and the duct is connectable. Can be further expanded.

According to the invention described in claim 4, according to claim 1
In addition to the effects of the invention described in any one of (3) to (3), the duct joint and the casing can be easily connected by hooking engagement. According to the fifth aspect of the invention, in addition to the effect of the fourth aspect of the invention, a simple structure can be provided between the hook portion of the duct joint and the engagement hole of the joint connection portion.

According to the connecting method of the present invention, a plurality of ducts having different sizes are selectively connected to the apparatus main body by directly connecting the duct joint corresponding to the duct to the apparatus main body. And without using an intermediate duct. In addition, since it is not necessary to use an intermediate duct, the range of connectable ducts can be widened when installing in a narrow space.

Further, since the duct joint is connected to the casing before the duct, the connection is easy.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an air conditioner according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of a casing, a duct joint and a duct of FIG.

FIG. 3 is a front view of a main part of the casing of FIG. 2;

FIG. 4 is a front view of the joint shown in FIG. 2;

FIG. 5 is a side view of the duct, the duct joint, and the casing of FIG. 1;

FIG. 6 is a side view of a duct, a duct joint, and a casing different from FIG. 5;

FIG. 7 is a side view of a duct, a duct joint, and a casing different from those in FIGS. 5 and 6;

FIG. 8 is a side view of a duct, a duct joint, and a casing different from those of FIGS. 5 to 7;

FIG. 9 is a sectional side view of a Y part shown in FIG. 5;

[Explanation of symbols]

 2 Air conditioner body 8 Outlet duct 24 Casing 24e Joint connection part 24f Joint connection part 24i Engagement hole 25 Duct joint 25i Hook part S Connection structure

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-145443 (JP, A) JP-A-2-171543 (JP, A) Jpn. Field (Int.Cl. ⁷ , DB name) F24F 13/02

Claims (6)

(57) [Claims] 1. A different double-sized air conditioner main body (2)
A structure for selectively connecting several ducts (8), said each duct more ducts joint (25) connecting the (8) directly respectively, the casing of the air conditioner main body (2) ( provided 24), and a joint connection part for connecting alternatively directly (24e) a plurality of types of ducts fittings conforming to a plurality of types of ducts (8) connected (25), the joint connection ( 24e) is the ventilation opening (2
4b), the fitting parts (24i, 24
j) A duct connection structure comprising: 2. The connection structure (S) according to claim 1, wherein
A connection structure, wherein a plurality of the joint connection portions (24e) are provided according to a duct joint (25) to be connected. 3. The connecting structure (S) according to claim 1, wherein the joint connecting portion (24e) includes a plurality of duct joints (2).
5) A connection structure including a single joint connection portion (24f) that can be connected alternatively. 4. The connection structure according to claim 1, wherein:
In (S), the joint connection (24e) and the duct joint (25)
Is a connection structure characterized by being hooked and engaged with each other. 5. The connection structure (S) according to claim 4, wherein
The duct joint (25) includes a hook part (25i), and the fitting part (24i, 24j ) of the joint connecting part (24e) includes an engagement hole (24i) for hooking and engaging the hook part (25i). A connection structure, characterized in that: 6. The duct according to claim 1, wherein
This is a method of selectively connecting ducts (8) of different sizes to the air conditioner body (2) provided with the connection structure (S) of (twenty five)
The joint connection of the casing (24) of the air conditioner body (2)
(24e) and then duct (8) to duct fitting (25).
A method of connecting a duct, wherein the duct is directly connected.