JP2020197308A - Connection structure of drain pipe for air conditioning equipment, and piping structure - Google Patents

Abstract

To make connection work easy, and to reduce a time and labor by arranging a connecting joint having a detachable structure.SOLUTION: A connection structure of a drain pipe for air conditioning equipment for connecting an air conditioner 3 arranged at an attic and a flexible hose 4, and drain piping 7 and the flexible hose 4 comprises: a first connecting joint 10 connected to the air conditioner 3 side and the drain piping 7 side; and a second connecting joint 20 connected to both ends of the flexible hose 4 side. The first connecting joint 10 is directly connected to the drain pipe and the drain piping 7 of the air conditioner 3 via an adhesive, the first connecting joint 10 and the second connecting joint 20 are arranged so as to be detachable from each other, a lock part 21 is arranged at either of the first connecting joint 10 and the second connecting joint 20, a locked part is arranged at the other, an extension part is located between lock protrusions when the first connecting joint 10 and the second connecting joint 20 are connected to each other, and the second connecting joint 20 at the air conditioner 3 side is connected to the flexible hose 4 via an elbow.SELECTED DRAWING: Figure 1

Description

The present invention relates to a connection structure for a drain pipe for an air conditioner and a piping structure.

Conventionally, in an air conditioner installed behind the ceiling of a room, the generated drain is guided to the outside through a flexible hose. As a connection structure between the drain pipe and the flexible hose in such an air conditioner, for example, as shown in Patent Document 1, an elbow pipe is provided on the drain pipe side of the flexible hose, and a drain hose is interposed between the elbow pipe and the drain pipe. It is common that the flexible hose is once started up from the elbow pipe and then discharged to the outside by a drain pipe or the like.

In Patent Document 1, a first connection portion for connecting to the drain pipe of the air-conditioning indoor unit and a second connection for connecting the drain discharged from the drain pipe to the outside of the room are connected. A configuration including a portion and a hose portion continuous with a first connecting portion and a second connecting portion and having heat insulating properties and elasticity is described.

Utility Model Registration No. 3144918

However, the conventional connection structure between the drain pipe and the flexible hose has the following problems.
That is, in the conventional connection structure shown in Patent Document 1 and the like, the connection portion other than the drain pipe is composed of many pipe parts such as a drain hose, a flexible hose (hose portion), and each connection joint, and these are connected to each other. It is connected by gluing or tightening with a band or the like. For example, in the connection between the drain pipe and the drain hose, or the connection between the drain hose and the connection joint (or flexible hose), the end of the drain pipe or connection joint is inserted into the drain hose, and the connection part is made of a metal band or the like. The fastener is tightened from the outside by a small screw portion provided on the fastener.

When tightening using such a fastener such as a metal band, it is necessary to tighten a small screw portion using a tool such as a screwdriver, which is a laborious and time-consuming work. Moreover, it takes a long time to maintain the piping and replace the piping material because it is not possible to easily disconnect the connection portion by adhesive as well as the connection portion once connected by using the fastener. In the case of an air conditioner installed behind the ceiling, the work is performed at a high place, so that the work efficiency is particularly reduced when the work is performed using a tool such as a driver. Therefore, there is a demand for a drain pipe connection structure that can be easily attached and detached, and there is room for improvement in that respect.

The present invention has been made in view of the above-mentioned problems. By providing a connection joint having a detachable structure, the connection work can be facilitated and the time and effort can be reduced. The connection structure of the drain pipe for air conditioning equipment can be reduced. , And to provide a piping structure.

In order to achieve the above object, the connection structure of the drain pipe for air conditioning equipment according to the present invention is a connection structure of the drain pipe for air conditioning equipment for connecting the air conditioner installed behind the ceiling and the flexible hose. A first connection joint connected to the air conditioner side and a second connection joint integrally connected to the flexible hose side via an elbow are provided, and the first connection joint and the second connection joint can be attached and detached. The first connection joint is directly connected to the drain pipe of the air conditioner or the drain hose connected to the air conditioner by an adhesive, the first connection joint is transparent, and the first connection joint is And the second connection joint are provided with a locking portion on one side and a locked portion on the other, and the locked portion includes two locking protrusions provided at symmetrical positions. The locking portion includes two extending portions provided at symmetrical positions, and when the first connecting joint and the second connecting joint are connected, the extending portion is provided between the locking protrusions. Is characterized by being located.

Further, the connection structure of the drain pipe for air conditioning equipment according to the present invention is a connection structure of the drain pipe for air conditioning equipment for connecting the drain pipe for discharging the drain generated from the air conditioning equipment and the flexible hose, and is the drain pipe. A first connection joint connected to the side and a second connection joint connected to the flexible hose side are provided, and the first connection joint and the second connection joint are detachably provided, and the first connection joint is provided. Is directly connected to the drain pipe by an adhesive, the first connection joint is transparent, one of the first connection joint and the second connection joint is provided with a locking portion, and the other is locked. A portion is provided, the locked portion includes two locking protrusions provided at symmetrical positions, and the locking portion includes two extending portions provided at symmetrical positions. When the connecting joint and the second connecting joint are connected, the extending portion is located between the locking protrusions.

Further, the connection structure of the drain pipe for air conditioning equipment according to the present invention is a connection structure of the drain pipe for air conditioning equipment for connecting the air conditioner installed behind the ceiling with the flexible hose and the drain pipe flexible hose. A first connection joint connected to the machine side and the drain pipe side, and a second connection joint connected to both ends on the flexible hose side are provided, and the first connection joint includes the drain pipe of the air conditioner and the drain pipe. Directly connected to the drain pipe by an adhesive, the first connection joint and the second connection joint are detachably provided, and a locking portion is provided on either one of the first connection joint and the second connection joint. The locked portion is provided with a locked portion on the other side, the locked portion is provided with two locking protrusions provided at symmetrical positions, and the locking portion is provided with two extending portions provided at symmetrical positions. When the first connection joint and the second connection joint are connected to each other, the extension portion is located between the locking protrusions, and the second connection joint on the air conditioner side is an elbow. It is characterized in that it is connected to the flexible hose via. The first connection joint may be transparent.

Further, the piping structure according to the present invention is a piping structure including an air conditioner installed behind the ceiling, a flexible hose, and a drain pipe, wherein the air conditioner and the flexible hose, and the drain pipe and the flexible hose are provided. May be characterized in that they are connected by the connection structure.

In the present invention, the first connection joint is connected to the drain pipe of the air conditioner (or the end opposite to the air conditioner side of the flexible hose) in advance, and the second connection is made to one end (or drain pipe) of the flexible hose. By connecting the joints, the first connection joint and the second connection joint can be connected after that, and this allows the tool to connect the drain pipe and the flexible hose, or the flexible hose and the drain pipe. It can be done easily without using it and without any hassle or time. Since the connection work is facilitated in this way, even when the air conditioner is provided in a high place and the work is difficult, the work can be performed efficiently.
Moreover, since the first connection joint and the second connection joint are detachable, both connection joints can be easily separated without performing time-consuming work even after the connection. Therefore, there is an advantage that the work can be performed efficiently even when the flexible hose is maintained or replaced.

According to the connection structure and the piping structure of the drain pipe for air-conditioning equipment of the present invention, by providing the connection joint of the detachable structure, the connection work can be facilitated, and the labor and time can be reduced.

It is a side view which shows the connection structure of a drain pipe and a flexible hose by embodiment of this invention. It is a perspective view which shows the structure of the drain pipe joint among the connection structures shown in FIG. It is a perspective view which shows the structure of the drain pipe joint, and is the figure which shows the state which connected the 1st connection joint and the 2nd connection joint. It is a half cross-sectional view which shows the structure of a drain pipe joint. It is a side view of the 1st connection joint. It is a side view of the 2nd connection joint. It is a perspective view which saw the bag nut of the 2nd connection joint from the extension part side. It is a figure which shows a part of the connection structure by another embodiment. It is a side view which shows the connection structure of a drain pipe and a flexible hose by another embodiment.

Hereinafter, the connection structure of the drain pipe for air conditioning equipment and the piping structure according to the embodiment of the present invention will be described in detail with reference to the drawings.

In the connection structure of the drain pipe for air conditioning equipment of the present embodiment shown in FIG. 1, for example, the drain pipe 31 provided in the air conditioner 3 provided behind the ceiling and the drain generated from the drain pipe 31 are discharged to the outside. A drain pipe joint 1 for connecting to the flexible hose 4 for the purpose is provided. Here, the flexible hose 4 can be configured by, for example, a covered hose having a two-layer structure in which the outer circumference of a soft or relatively hard vinyl chloride hose is coated with a heat insulating material such as urethane foam.

In the present embodiment, a drain hose 5 made of a cross-linked polyethylene pipe is provided between the drain pipe 31 and the drain pipe joint 1, and an elbow 6 is provided between the drain pipe joint 1 and the flexible hose 4. That is, as the connection structure of the present embodiment, the drain pipe 31, the drain hose 5, the drain pipe joint 1, the elbow 6, and the flexible hose 4 are connected in this order from the air conditioner 3 side, and the drain pipe is connected to the tip of the flexible hose 4. 7 is connected and drainage is discharged through these pipe materials. The flexible hose 4 is arranged so as to temporarily rise from the elbow 6.
Further, the drain hose 5, the drain pipe joint 1, and the elbow 6 are preferably covered with a heat insulating material (not shown) or have a heat insulating function to prevent dew condensation.

Here, in FIG. 1, the air conditioner 3, a part of the drain pipe joint 1 (first connection joint 10 described later), and the rising portion of the flexible hose 4 (support portion of reference numeral 61) are each provided by a suspending member 8 to the building ceiling. Suspended from surface T. The hanging position and the number of hanging points are not limited to this, and can be set arbitrarily.

As shown in FIGS. 1 to 3, the drain pipe joint 1 includes a first connection joint 10 connected to the air conditioner 3 side and a second connection joint 20 connected to the flexible hose 4 side, and is first connected. The joint 10 and the second connecting joint 20 are detachably provided.

As shown in FIGS. 2, 4 and 5, the first connection joint 10 is formed by injection molding a vinyl chloride resin, and one end thereof is a spigot connected to a drain hose 5 on the drain pipe 31 side. A portion 11 is provided, and a male screw cylinder portion 12 (locked portion) and a flange 13 (locked portion) are provided at the other end.

The male screw cylinder portion 12 has a double-threaded structure composed of two spiral ridges 12a having a starting end shifted by 180 degrees and each having a pitch of approximately 1 pitch, and the bag nut 21 (locking) of the second connecting joint 20 described later. The female threaded portion 21a (see FIG. 7) of the portion) is screwed.
The flange 13 includes an elliptical flange body portion 13a and two locking protrusions 13b provided at symmetrical positions.

Each of the locking protrusions 13b has a locking surface at a position deviated from the long axis of the ellipse of the flange main body 13a by approximately 45 degrees, and the screw tightening direction of the male screw cylinder portion 12 from the tip of the locking surface. On the opposite side, a tapered surface is provided so as to gradually approach the flange body 13a and be flush with the flange body 13a at the end. That is, the locking protrusion 13b projects in the outer peripheral direction of the flange main body 13a, and the height from the flange main body 13a gradually increases in the screw tightening direction.

On the other hand, as shown in FIGS. 3, 4, 6 and 7, the second connecting joint 20 includes a bag nut 21 and a joint body 22 (joint pipe) into which the bag nut 21 is rotatably fitted. It has.

The joint body 22 is provided with a spigot portion 22a at one end and a connection portion 22b at the other end.
The outlet portion 22a is inserted into the male screw cylinder portion 12, and an O-ring 22c is fitted around the spigot portion 22a so as to be in close contact with the inner surface of the male screw cylinder portion 12 in a liquid-tight manner. The connecting portion 22b is integrally connected to the elbow 6.

The bag nut 21 includes a bag nut main body portion 23 and two detent portions 24.
The bag nut main body 23 has a double-threaded screw formed on the inner peripheral surface so as to be screwed into the male screw cylinder portion 12, and cannot be detached from the joint main body 22 so that the open end thereof faces the tip of the outlet portion 22a. And, it is mounted rotatably.

The two detent portions 24 are provided point-symmetrically with the central axis of the bag nut main body portion 23 as the center of symmetry, and include a movable portion 24a and an extension portion 24b.

The movable portion 24a has an arc shape having an inner diameter slightly larger than the outer peripheral surface of the bag nut main body 23, and one end thereof is concentric with the outer wall surface of the bag nut main body 23 on the wall surface of the bag nut main body 23. It is fixed so that it becomes. Further, in the no-load state, the movable portion 24a is formed with a gap having a substantially equal width between the movable portion 24a and the outer wall surface of the bag nut main body 23, and a force is applied by a finger or the like in the radial direction of the bag nut main body 23. When it receives it, it elastically deforms in the direction in which the force is applied, centering on the fixed part.
The extending portion 24b is provided so as to extend from the open end of the movable portion 24a parallel to the central axis of the bag nut main body 23 and outward from the edge of the bag nut main body 23.

Next, the method of connecting the drain pipe joint 1 having the above-described configuration and the operation of the connection structure of the drain pipe for air conditioning equipment using the drain pipe joint 1 will be described with reference to the drawings.
As shown in FIGS. 2 and 3, in the drain pipe joint 1 according to the present embodiment, when connecting the first connection joint 10 and the second connection joint 20, the outlet portion 22a of the second connection joint 20 is male-threaded. After being inserted into the tubular portion 12, the bag nut 21 is manually rotated to screw the bag nut main body portion 23 into the male screw tubular portion 12. Along with this screwing, the outlet portion 22a enters toward the inside of the male screw cylinder portion 12. Further, when the bag nut main body 23 is screwed in until it rotates about 90 degrees, the extension portion 24b is located near the elliptical short axis of the flange main body 13a and is the end edge of the flange main body 13a on the male screw cylinder 12 side. And moves in the flange 13 direction to a position that substantially coincides with the tip edge of the extension portion 24b.
When the bag nut 21 is further screwed in, the extending portion 24b is first received by the tapered surface of the locking protrusion 13b, and as the screwing progresses, the movable portion 24a is elastically deformed to form a flange along the tapered surface. It gradually moves outward in the radial direction of 13.

Then, when the bag nut main body 23 is screwed in until it rotates approximately 180 degrees, the extending portion 24b gets over the locking protrusion 13b, and the elastic restoring force of the movable portion 24a causes the detent portion 24 to move to the bag nut main body 23. Restore the original shape along the outer peripheral surface. Therefore, even if the bag nut 21 tries to rotate in the loosening direction of the screw, the extending portion 24b comes into contact with the locking surface of the locking protrusion 13b, and the bag nut 21 is prevented from rotating in the loosening direction. At the same time, the end face of the bag nut main body 23 is received by the flange 13, and no further screwing is possible.
As described above, the drain pipe joint 1 has a one-touch joint structure having a locking structure in which the first connection joint 10 and the second connection joint 20 are detachable from each other.

In the present embodiment, as shown in FIG. 1, for example, the first connection joint 10 is connected to the drain pipe 31 of the air conditioner 3 with an adhesive via a drain hose 5 connected to the drain pipe 31 of the air conditioner 3 with a metal band or an adhesive. Connect by gluing. At the same time, a second connection joint 20 in which the elbow 6 is integrally provided is connected to one end 4a of the flexible hose 4 by adhesion. After that, the first connection joint 10 and the second connection joint 20 can be connected, whereby the connection work between the drain pipe 31 and the flexible hose 4 can be easily performed without taking time and effort. Since the connection work is facilitated in this way, even when the air conditioner 3 is provided at a high place and the work is difficult, the work can be performed efficiently.
Moreover, since the first connection joint 10 and the second connection joint 20 can be attached and detached by manually fitting and screwing in without using a tool such as a screwdriver, it is necessary to perform time-consuming work even after connecting. Both connecting joints 10 and 20 can be easily detached. Therefore, there is an advantage that the work can be efficiently performed even when the flexible hose 4 is maintained or replaced.

Further, in the case of the present embodiment, since the drain pipe joint 1 has a one-touch joint structure in which the connection portion between the first connection joint 10 and the second connection joint 20 can be attached and detached without using a tool, the connection work is shortened. It can be done quickly and easily. It also has the advantage of being able to work in narrow spaces.

Further, in the present embodiment, the female threaded portion 21a of the bag nut 21 of the second connecting joint 20 is screwed from the outside of the male threaded tubular portion 12 of the first connecting joint 10 to connect the connecting joints 10 and 20 to each other. It can be easily joined.
Moreover, since the bag nut 21 is rotatably provided around the joint body 22, at least one of the first connection joint 10 and the second connection joint 20 (here, only the second connection joint 20) as in the present embodiment. ), Even if the elbow 6 is connected, the first connection joint 10 and the second connection joint 20 can be connected regardless of the orientation of the elbow 6.

In the connection structure and the piping structure of the drain pipe for the air conditioner configured as described above, the work can be facilitated and the labor and time can be reduced by adopting a simple attachment / detachment structure.

Although the connection structure of the drain pipe for air conditioning equipment and the embodiment of the piping structure according to the present invention have been described above, the present invention is not limited to the above-described embodiment and is appropriately used as long as the purpose is not deviated. It can be changed.

For example, in the above-described embodiment, the elbow 6 is provided between the drain pipe joint 1 and the flexible hose 4, but the present invention is not limited to this. For example, as shown in FIG. 8, the outlet 22a of the joint body 22 of the second joint 20 is directly connected to one end 4a of the flexible hose 4, and the elbow 6 is connected to the outlet 11 of the first joint 10. It is also possible to configure it.
In this case, the end portion 6a of the elbow 6 opposite to the drain pipe joint 1 is connected to the drain hose 5.

Further, in the present embodiment, the male screw cylinder portion 12 and the flange 13 of the first connecting joint 10 are locked portions, and the bag nut 21 of the second connecting joint 20 is a locking portion. , It is not limited to this, and other structures can be adopted. For example, in the present embodiment, the rotation of the bag nut 21 is locked by the detent portion 24, but the detent portion 24 is omitted and the bag nut 21 is joined only by screwing the female thread portion 21a. It may have a configuration, or another configuration that does not use the bag nut 21 may be used. For example, as another detachable locking structure, a known bayonet mechanism (Japanese Patent Laid-Open No. 2010-96241) for fitting the protrusion and the bayonet groove through a groove provided on the engaging wall, or a bayonet mechanism to be connected is used. Just by inserting the pipe into the pipe insertion part, the enlarged diameter piece with the tightening ring expanded will fly, and the tightening ring elastically contracts to tighten the pipe with the nozzle-shaped inner cylinder inserted into the pipe. Examples thereof include a known one-touch connection structure (Japanese Patent Laid-Open No. 2001-295974) designed to prevent the water from coming off.

Further, in the above-described embodiment, the male screw cylinder portion 12 and the flange 13 are provided in the first connection joint 10, and the bag nut 21 is provided in the second connection joint 20, but the configurations may be reversed. That is, the first connection joint 10 connected to the drain pipe 31 side may have a bag nut, and the second connection joint 20 connected to the flexible hose 4 side may have a male screw cylinder portion and a flange.

Further, it is also possible to omit the drain hose 5 and connect the drain pipe joint 1 directly to the drain pipe 31, so that the flexible hose 4 can be arranged close to the air conditioner 3 to make the connection structure compact. be able to. In this case, the first connection joint 10 and the drain pipe 31 can be connected by adhesive joining with an adhesive.

Furthermore, it is also possible to make the first connection joint 10 a transparent member, which has an advantage that the state of application of the adhesive can be confirmed.

Further, the connection point of the drain pipe joint 1 is not limited to being between the drain pipe 31 and the flexible hose 4 as in the present embodiment. In addition, as shown in FIG. 9, the drain pipe joint 1 has a flexible hose 4 for discharging the drain generated from the drain pipe 31 provided in the air conditioner 3 to the outside, and the air conditioner 3 side of the flexible hose 4. It may be arranged between the drain pipe 7 connected to the end portion 4b on the opposite side. In this case, the second connection joint 20 connected to the flexible hose 4 side and the first connection joint 10 connected to the drain pipe 7 side are provided, and the first connection joint 10 and the second connection joint 20 can be attached and detached. It has a provided connection structure.
In FIG. 9, by making the elbow 6 a known heat insulating joint provided with a heat insulating layer (Japanese Unexamined Patent Publication No. 2012-233675), it is possible to save the trouble of covering the outside of the joint with a heat insulating material.
Furthermore, the connection points of the drain pipe joint 1 may be provided between the flexible hose 4 and the end portion 4a on the air conditioner 3 side, and the connection points of the drain pipe joint 1 may be provided at both ends of the flexible hose 4.

In addition, it is possible to replace the components in the above-described embodiment with well-known components as appropriate without departing from the spirit of the present invention.

1 Drain pipe joint 3 Air conditioner 4 Flexible hose 5 Drain hose 6 Elbow 7 Drain pipe 10 1st connection joint 12 Male screw cylinder part (locked part)
13 Flange (locked part)
20 Second connection joint 21 Bag nut (locking part)
22 Fitting body (fitting pipe)
23 Bag nut body part 24 Anti-rotation part 31 Drain pipe

Claims (3)

It is a connection structure of an air conditioner and a flexible hose installed behind the ceiling, and a drain pipe for air conditioning equipment for connecting the drain pipe and the flexible hose.
A first connection joint connected to the air conditioner side and the drain pipe side, and a second connection joint connected to both ends on the flexible hose side are provided.
The first connection joint is directly connected to the drain pipe of the air conditioner and the drain pipe by an adhesive.
The first connection joint and the second connection joint are detachably provided.
A locking portion is provided on either one of the first connecting joint and the second connecting joint, and a locked portion is provided on the other.
The locked portion includes two locking protrusions provided at symmetrical positions.
The locking portion comprises two extending portions provided at symmetrical positions.
When the first connection joint and the second connection joint are connected, the extension portion is located between the locking protrusions.
The second connection joint on the air conditioner side has a connection structure for a drain pipe for air conditioning equipment, which is connected to the flexible hose via an elbow. The connection structure for a drain pipe for air conditioning equipment according to claim 1, wherein the first connection joint is transparent. It is a piping structure equipped with an air conditioner installed behind the ceiling, a flexible hose, and a drain pipe.
A piping structure characterized in that the air conditioner and the flexible hose, and the drain pipe and the flexible hose are connected by the connection structure according to claim 1 or 2.

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