JP2022153644A - Connection structure of drain pipe for air conditioning equipment, and piping structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: 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

COPYRIGHT: (C)2023,JPO&INPIT

Description

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

2. Description of the Related Art Conventionally, in an air conditioner installed in the ceiling space of a room or the like, generated drainage is led to the outside of the room through a flexible hose. As a connection structure between the drain pipe and the flexible hose in such an air conditioner, an elbow pipe is provided on the drain pipe side of the flexible hose, and the drain hose is interposed between the elbow pipe and the drain pipe, as shown in Patent Document 1, for example. After the flexible hose is raised from the elbow pipe, it is generally discharged to the outside of the room through a drain pipe or the like.

Patent Document 1 discloses a first connection portion for connecting to a drain pipe of an air conditioner indoor unit, and a second connection for connecting to a horizontal drain pipe for guiding the drain discharged from the drain pipe to the outside of the room. and a heat-insulating and elastic hose portion continuous with the first and second connection portions.

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, etc., the connection parts other than the drain pipe are composed of many pipe parts such as a drain hose, a flexible hose (hose part), and each connection joint. It is connected by adhesion or tightening using a band or the like. For example, when connecting a drain pipe and a drain hose, or connecting a drain hose and a connection joint (or flexible hose), insert the end of the drain pipe or connection joint into the drain hose, and then tighten the joint with a metal band or the like. The fastener is externally tightened by a small thread on the fastener.

When tightening using such a tightening tool such as a metal band, it is necessary to tighten a small threaded portion using a tool such as a screwdriver, which is laborious and time-consuming work. Moreover, it takes time to maintain the pipes and replace the pipe materials because it is not possible to easily disconnect the joints that have been connected using a fastener, not to mention the joints by adhesion. In the case of an air conditioner installed in the ceiling space, the work must be carried out in a high place, and the work using a tool such as a screwdriver is particularly inefficient. Therefore, there is a demand for a drain pipe connection structure that is easy to attach and detach, and there is room for improvement in this respect.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and a connection structure for a drain pipe for an air-conditioning facility that provides a detachable connection joint that facilitates the connection work and reduces labor and time. , and to provide a piping structure.

In order to achieve the above object, the air conditioner drain pipe connection structure according to the present invention is an air conditioner drain pipe connection structure for connecting an air conditioner installed in the ceiling and a flexible hose, A first connection joint connected to the air conditioner side, and a second connection joint connected to the flexible hose side via an elbow, wherein the first connection joint and the second connection joint are detachably provided. , the first connection joint is directly connected with an adhesive to a drain pipe of the air conditioner or a drain hose connected to the air conditioner, and is engaged with either the first connection joint or the second connection joint. A portion to be locked is provided on the other side, and the portion to be locked has two protrusions provided at symmetrical positions, and the locking portion has two extensions provided at symmetrical positions. A projecting portion is provided, and when the first connection joint and the second connection joint are connected, the tip of the projecting portion is located closer to the air conditioner than the projecting portion. The first connection joint may be transparent.

Further, the piping structure according to the present invention may be characterized by comprising an air conditioner installed behind the ceiling, a flexible hose, a drain pipe, and the connection structure.

In the present invention, in advance, the first connection joint is connected to the drain pipe of the air conditioner (or the end of the flexible hose opposite to the air conditioner side), and the second connection is connected to one end of the flexible hose (or the drain pipe). By connecting the joints, it is possible to connect the first connection joint and the second connection joint after that, thereby connecting the drain pipe and the flexible hose or connecting the flexible hose and the drain pipe without using a tool. It can be done easily without spending time and effort. Since the connection work is facilitated in this manner, the work can be performed efficiently even when the air conditioner is installed at a high place and the work is difficult.
Moreover, since the first connection joint and the second connection joint are detachable, both connection joints can be easily separated without performing troublesome work even after connection. Therefore, there is an advantage that maintenance or replacement of the flexible hose can be performed efficiently.

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

It is a side view which shows the connection structure of the drain pipe and flexible hose by embodiment of this invention. FIG. 2 is a perspective view showing the configuration of a drain pipe joint in the connection structure shown in FIG. 1, showing a state before the first connection joint and the second connection joint are connected; FIG. 4 is a perspective view showing the configuration of the drain pipe joint, showing a state in which the first connection joint and the second connection joint are connected; It is a half cross-sectional view showing the configuration of the drain pipe joint. It is a side view of a 1st connection joint. It is a side view of a 2nd connection joint. It is the perspective view which looked at the cap nut of the 2nd connection joint from the extension part side. It is a figure which shows a part of connection structure by other embodiment. It is a side view which shows the connection structure of drain piping and flexible hose by other embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, the connection structure of the drain pipe for air conditioners and piping structure by embodiment of this invention is demonstrated in detail based on drawing.

The air conditioner drain pipe connection structure of the present embodiment shown in FIG. It has a drain pipe joint 1 for connecting a flexible hose 4 for Here, the flexible hose 4 can be constituted by, for example, a double-layer coated hose made by coating the outer periphery of a soft or relatively hard vinyl chloride hose with a heat insulating material such as foamed urethane.

In this embodiment, a drain hose 5 made of a crosslinked 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. 7 are connected and condensate is discharged through these tubings. The flexible hose 4 is arranged so as to rise once from the elbow 6. - 特許庁
The drain hose 5, the drain pipe joint 1, and the elbow 6 are preferably covered with a heat insulating material (not shown) or provided with a heat insulating function to prevent dew condensation.

Here, in FIG. 1, the air conditioner 3, a portion of the drain pipe joint 1 (first connection joint 10 described later), and the rising portion of the flexible hose 4 (supporting portion denoted by reference numeral 61) are attached to the ceiling of the building by suspension members 8, respectively. It is suspended from the surface T. Note that the hanging positions and the number of hanging locations are not limited to these, 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. A joint 10 and a second connection joint 20 are detachably provided.

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

The male threaded cylindrical portion 12 has a double screw structure consisting of two helical ridges 12a with starting ends shifted by 180 degrees and each having a pitch of approximately 1 pitch. part) is screwed into the female threaded portion 21a (see FIG. 7).
The flange 13 has an elliptical flange body portion 13a and two locking protrusions 13b provided at symmetrical positions.

Each of the locking projections 13b has a locking surface at a position shifted by approximately 45 degrees from the major axis of the ellipse of the flange main body 13a. It has a tapered surface that gradually approaches the flange main body portion 13a on the opposite side and is flush with the flange main body portion 13a at the terminal end. That is, the locking protrusion 13b protrudes in the outer peripheral direction of the flange main body 13a, and gradually increases in height from the flange main body 13a in the screw tightening direction.

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

The joint body 22 has a spigot portion 22a at one end and a connection portion 22b at the other end.
The spigot portion 22a is adapted to be inserted into the male threaded cylindrical 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 threaded cylindrical portion 12 in a liquid-tight manner. The connecting portion 22b is integrally connected to the elbow 6. As shown in FIG.

The cap nut 21 includes a cap nut body portion 23 and two anti-rotation portions 24 .
The cap nut main body portion 23 has a double thread formed on its inner peripheral surface so as to be screwed onto the male threaded cylindrical portion 12, and the open end thereof faces the tip of the spigot portion 22a. and is rotatably mounted.

The two anti-rotation portions 24 are provided symmetrically with respect to the central axis of the cap nut body portion 23, and include a movable portion 24a and an extension portion 24b.

The movable portion 24a has an arcuate shape with an inner diameter slightly larger than the outer peripheral surface of the cap nut main body 23, and one end of the movable portion 24a is attached to the wall surface of the cap nut main body 23 concentrically with the outer wall surface of the cap nut main body 23. It is fixed so that In addition, when the movable portion 24a is in an unloaded state, a gap having a substantially uniform width is formed between the movable portion 24a and the outer wall surface of the cap nut body portion 23, and force is applied in the radial direction of the cap nut body portion 23 by a finger or the like. When received, it is elastically deformed in the direction in which the force is applied, centering on the fixed portion.
The extending portion 24b is provided so as to extend outward from the open end of the movable portion 24a in parallel with the center axis of the cap nut body portion 23 and from the edge of the cap nut body portion 23 .

Next, the connection method of the drain pipe joint 1 configured as described above and the operation of the connection structure of the air conditioner drain pipe 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 spigot portion 22a of the second connection joint 20 is male-threaded. After inserting it into the cylindrical portion 12 , the cap nut 21 is rotated by hand to screw the cap nut body portion 23 into the male threaded cylindrical portion 12 . Along with this screwing, the spigot portion 22 a advances toward the inside of the male threaded cylindrical portion 12 . Further, when the cap nut main body 23 is screwed in by approximately 90 degrees, the extension 24b is positioned near the short axis of the ellipse of the flange main body 13a at the end edge of the flange main body 13a on the male threaded cylindrical portion 12 side. , and moves in the direction of the flange 13 to a position substantially coinciding with the leading end edge of the extending portion 24b.
As the cap nut 21 is further screwed, the extending portion 24b is first received by the tapered surface of the locking protrusion 13b, and as the screwing progresses, the elastic deformation of the movable portion 24a causes the extending portion 24b to extend along the tapered surface. 13 gradually move radially outward.

Then, when the cap nut main body 23 is screwed in until it rotates approximately 180 degrees, the extension 24b climbs over the locking protrusion 13b, and the elastic restoring force of the movable part 24a causes the anti-rotation part 24 to move the cap nut main body 23. It restores to its original shape along the outer circumference. Therefore, even if the cap nut 21 tries to rotate in the loosening direction, the extension 24b abuts against the locking surface of the locking projection 13b to prevent rotation in the loosening direction. At the same time, the end face of the cap nut main body 23 is received by the flange 13, and further screwing is impossible.
As described above, the drain pipe joint 1 has a one-touch joint structure in which the first connection joint 10 and the second connection joint 20 are detachably attached to each other.

In the present embodiment, as shown in FIG. 1, for example, the first connection joint 10 is attached with an adhesive through the drain hose 5 which is previously connected to the drain pipe 31 of the air conditioner 3 with a metal band, adhesive, or the like. Connect by gluing. At the same time, a second connection joint 20 integrally provided with an elbow 6 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, so that the operation of connecting 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 manner, the work can be performed efficiently even when the air conditioner 3 is installed at a high place and the work is difficult.
Moreover, since the first connection joint 10 and the second connection joint 20 can be attached and detached by fitting and screwing by hand without using a tool such as a screwdriver, troublesome work can be performed even after connection. Both of the connection joints 10 and 20 can be easily separated without any force. Therefore, there is an advantage that maintenance or replacement of the flexible hose 4 can be performed efficiently.

In addition, in the case of the present embodiment, since the drain pipe joint 1 has a one-touch joint structure in which the connection between the first connection joint 10 and the second connection joint 20 can be attached and detached without using a tool, connection work can be shortened. It can be done quickly and easily. In addition, there is an advantage that work can be performed in a narrow space.

Furthermore, in the present embodiment, by screwing the female threaded portion 21a of the cap nut 21 of the second connection joint 20 from the outside of the male threaded tubular portion 12 of the first connection joint 10, both connection joints 10 and 20 are connected to each other. Easy to join.
Moreover, since the cap 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) can be ), the first connection joint 10 and the second connection joint 20 can be connected regardless of the orientation of the elbow 6 .

In the air conditioner drain pipe connection structure and piping structure configured in this manner, the simple attachment/detachment structure facilitates the work and has the effect of reducing labor and time.

Although the embodiments of the air-conditioning equipment drain pipe connection structure and piping structure according to the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be modified as appropriate without departing from the scope of the present invention. Can be changed.

For example, in the present embodiment described above, 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 spigot portion 22a of the joint body 22 of the second connection joint 20 is directly connected to the one end 4a of the flexible hose 4, and the elbow 6 is connected to the spigot portion 11 of the first connection joint 10. It is also possible to configure
In this case, the end portion 6 a of the elbow 6 opposite to the drain pipe joint 1 is connected to the drain hose 5 .

In addition, in the present embodiment, the connection joint has a structure in which the male threaded cylindrical portion 12 and the flange 13 of the first connection joint 10 are the locked portions, and the cap nut 21 of the second connection joint 20 is the locking portion. , but is not limited to this, and other structures can be adopted. For example, in the present embodiment, the rotation of the cap nut 21 is stopped by the anti-rotation portion 24. However, the anti-rotation portion 24 is omitted, and the cap nut 21 is joined only by screwing the female thread portion 21a of the cap nut 21. A configuration may be used, or another configuration that does not use the cap nut 21 may be used. For example, as another detachable locking structure, a well-known bayonet mechanism (Japanese Patent Laid-Open No. 2010-96241) that engages the protrusion and the bayonet groove through the groove provided in the engagement wall, or a connected Simply by inserting the pipe into the pipe insertion part, the expansion piece that expands the diameter of the tightening ring flies, and the tightening ring elastically shrinks to tighten the pipe between the pipe and the nozzle-shaped inner cylinder inserted inside the pipe. There is a known one-touch connection structure (Japanese Patent Application Laid-Open No. 2001-295974) designed to prevent slipping and stop water.

In the above-described embodiment, the first connection joint 10 is provided with the male threaded cylindrical portion 12 and the flange 13, and the second connection joint 20 is provided with the cap nut 21, but the configurations may be reversed. That is, the first connection joint 10 connected to the drain pipe 31 side may be configured to have a cap nut, and the second connection joint 20 connected to the flexible hose 4 side may be configured to have a male threaded cylindrical portion and a flange.

Furthermore, it is also possible to omit the drain hose 5 and connect the drain pipe joint 1 directly to the drain pipe 31, which makes it possible to arrange the flexible hose 4 closer to the air conditioner 3, thereby making the connection structure more compact. be able to. In this case, the first connection joint 10 and the drain pipe 31 can be connected by adhesive bonding using an adhesive.

Furthermore, it is also possible to make the first connection joint 10 a transparent member, which is advantageous in that the application state of the adhesive can be checked.

Also, 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 includes a flexible hose 4 for discharging the drain generated from a drain pipe 31 provided in the air conditioner 3 to the outside, and the flexible hose 4 on the air conditioner 3 side. and the drain pipe 7 connected to the opposite end 4b. In this case, a second connection joint 20 connected to the flexible hose 4 side and a 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 are detachably attached. It is a connection structure provided.
In FIG. 9, the elbow 6 is a well-known heat insulating joint (JP-A-2012-233675) having a heat insulating layer, thereby saving the trouble of covering the outside of the joint with a heat insulating material.
Further, a connection point for 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 for the drain pipe joint 1 may be provided at both ends of the flexible hose 4.

In addition, it is possible to appropriately replace the components in the above-described embodiments with well-known components without departing from the scope of the present invention.

1 Drain Pipe Joint 3 Air Conditioner 4 Flexible Hose 5 Drain Hose 6 Elbow 7 Drain Pipe 10 First Connection Joint 12 Male Threaded Cylindrical Portion (Locked Portion)
13 Flange (locked portion)
20 Second connection joint 21 Cap nut (locking portion)
22 joint body (joint pipe)
23 Cap nut body 24 Whirl-stop 31 Drain pipe

Claims (3)

A connection structure for an air conditioner drain pipe for connecting an air conditioner installed in the ceiling and a flexible hose,
A first connection joint connected to the air conditioner side, and a second connection joint connected to the flexible hose side via an elbow,
The first connection joint and the second connection joint are detachably provided,
The first connection joint is directly connected by an adhesive to a drain pipe of the air conditioner or a drain hose connected to the air conditioner,
one of the first connection joint and the second connection joint is provided with a locking portion, and the other is provided with a locked portion;
The locked portion includes two protrusions provided at symmetrical positions,
The locking portion includes two extending portions provided at symmetrical positions,
A connecting structure for a drain pipe for an air conditioner, wherein when the first connection joint and the second connection joint are connected, a tip end of the extension portion is located closer to the air conditioner than the projection portion. 2. The connection structure of drain pipes for an air conditioner according to claim 1, wherein said first connection joint is transparent. A piping structure comprising an air conditioner installed in a ceiling, a flexible hose, a drain pipe, and the connection structure according to claim 1 or 2.

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