JP7411032B2 - Drain pipe connection structure and piping structure for air conditioning equipment - Google Patents

Description

The present invention relates to a connection structure for a drain pipe for air conditioning equipment, and a piping structure.

Conventionally, in air conditioners installed in the ceiling of a room, the generated drainage is guided outside through a flexible hose. As a connection structure between a drain pipe and a 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 the drain hose is interposed between the elbow pipe and the drain pipe. Generally, the flexible hose is once raised from the elbow pipe and then discharged outside through a drain pipe, etc.

Patent Document 1 discloses a first connection part for connecting to a drain pipe of an air conditioning indoor unit, and a second connection part for connecting to a horizontal drain pipe for guiding drain discharged from the drain pipe to the outdoors. A configuration is described in which the hose part is continuous with the first connection part and the second connection part and has heat insulating properties and elasticity.

Utility model registration No. 3144918

However, the conventional connection structure between a drain pipe and a flexible hose has the following problems.
In other words, 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 various connection joints, and these parts are connected to each other. They are connected by adhesive or by tightening using a band or the like. For example, when connecting a drain pipe and a drain hose, or a drain hose and a connecting joint (or flexible hose), insert the end of the drain pipe or connecting joint into the drain hose, and then secure the connecting part with a metal band, etc. The fastener is tightened from the outside using a small threaded portion provided on the fastener.

When tightening using a fastener such as a metal band, it is necessary to tighten a small threaded portion using a tool such as a screwdriver, which is a laborious and time-consuming task. Moreover, since it is not possible to easily disconnect not only the adhesively connected portions but also the portions once connected using a fastener, it takes time to maintain the piping and replace the piping materials. In the case of an air conditioner installed in the ceiling, the work must be done at height, so work efficiency is particularly reduced when using tools such as screwdrivers. Therefore, there is a need for a drain pipe connection structure that is easy to attach and detach, and there is room for improvement in this respect.

The present invention has been made in view of the above-mentioned problems, and has a connection structure for drain pipes for air conditioning equipment, which facilitates connection work and reduces labor and time by providing a connection joint with a detachable structure. , and piping structures.

In order to achieve the above object, there is provided a drain pipe connection structure for air conditioning equipment according to the present invention for connecting an air conditioner installed in the ceiling and a flexible hose, comprising: 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 being detachably provided. , the first connection joint is directly connected to a drain pipe of the air conditioner or a drain hose connected to the air conditioner by an adhesive and is transparent , and the first connection joint and the second connection joint are transparent. A locking portion is provided on one side, a locked portion is provided on the other side, the locked portion includes two protrusions provided at symmetrical positions, and the locking portion is provided at symmetrical positions. When the first connecting joint and the second connecting joint are connected, the tip of the extending portion is located closer to the air conditioner than the protrusion .

Further, the piping structure according to the present invention may include an air conditioner installed in the attic, a flexible hose, a drain pipe, and the connection structure.

In the present invention, 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) in advance, and the second connection is connected to one end of the flexible hose (or the drain pipe). By connecting the joints, you can then connect the first connection joint and the second connection joint, which allows you to connect the drain pipe and flexible hose, or connect the flexible hose and drain pipe without using tools. It can be easily done without any effort or time. Since the connection work is facilitated in this way, the work can be carried out efficiently even if the air conditioner is installed at a high place and is difficult to work on.
Moreover, since the first connection joint and the second connection joint are detachable, even after connection, both connection joints can be easily removed without performing any labor-intensive work. Therefore, there is an advantage that maintenance and replacement of the flexible hose can be carried out efficiently.

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

FIG. 2 is a side view showing a connection structure between a drain pipe and a flexible hose according to an embodiment of the present invention. It is a perspective view showing the structure of the drain pipe joint of the connection structure shown in FIG. 1, and is a diagram showing the state before the first connection joint and the second connection joint are connected. It is a perspective view showing the composition of a drain pipe joint, and is a figure showing a state where a first connection joint and a second connection joint are connected. It is a half sectional view showing the structure of a drain pipe joint. It is a side view of a 1st connection joint. It is a side view of a 2nd connection joint. FIG. 3 is a perspective view of the cap nut of the second connection joint as seen from the extension side. It is a figure which shows a part of connection structure by other embodiments. FIG. 7 is a side view showing a connection structure between a drain pipe and a flexible hose according to another embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, the connection structure and piping structure of the drain pipe for air conditioners according to the embodiment of the present invention will be described in detail based on the drawings.

The connection structure of a drain pipe for an air conditioner according to the present embodiment shown in FIG. 1 connects a drain pipe 31 provided in an air conditioner 3 installed in the ceiling, for example, and drains generated from the drain pipe 31 to the outside. A drain pipe joint 1 is provided for connecting a flexible hose 4 for use. Here, the flexible hose 4 can be constituted by, for example, a two-layer covered hose formed by covering 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 this embodiment, the drain pipe 31, drain hose 5, drain pipe joint 1, elbow 6, and flexible hose 4 are connected in this order from the air conditioner 3 side, and the flexible hose 4 has a drain pipe at the end. 7 are connected and drain is discharged through these tubes. The flexible hose 4 is arranged so as to rise from the elbow 6.
Further, it is preferable that the drain hose 5, the drain pipe joint 1, and the elbow 6 be 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 part of the drain pipe joint 1 (first connection joint 10 to be described later), and the rising part of the flexible hose 4 (support part 61) are connected to the ceiling of the building by hanging members 8, respectively. It is suspended from surface T. Note that these hanging positions and the number of hanging points 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. The joint 10 and the second connection joint 20 are provided in a detachable manner.

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

The externally threaded cylindrical portion 12 has a double threaded structure consisting of two helical protrusions 12a each having approximately 1 pitch with their starting ends deviated by 180 degrees. The female threaded portion 21a (see FIG. 7) of the portion) is adapted to be screwed together.
The flange 13 includes an elliptical flange main body 13a and two locking protrusions 13b provided at symmetrical positions.

Each of the locking protrusions 13b has a locking surface at a position shifted approximately 45 degrees from the long axis of the ellipse of the flange main body 13a, and from the tip of this locking surface, there is a direction in which the screw of the male threaded cylindrical portion 12 is tightened. On the opposite side, a tapered surface is provided that gradually approaches the flange main body 13a and is flush with the flange main body 13a at the end. That is, the locking protrusion 13b protrudes toward the outer circumference of the flange main body 13a, and its height from the flange main body 13a gradually increases in the tightening direction of the screw.

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 tube) into which the cap nut 21 is rotatably fitted, It is equipped with

The joint main body 22 includes a spout portion 22a at one end and a connecting portion 22b at the other end.
The spout portion 22a is adapted to be inserted into the male threaded tube portion 12, and an O-ring 22c is fitted around the periphery thereof, so that it is in fluid-tight contact with the inner surface of the male threaded tube portion 12. The connecting portion 22b is integrally connected to the elbow 6.

The cap nut 21 includes a cap nut main body portion 23 and two rotation prevention portions 24.
The cap nut main body part 23 has a double thread thread formed on its inner peripheral surface so as to be screwed into the male threaded cylinder part 12, and is attached to the joint main body 22 so that the open end thereof faces the tip of the spout part 22a so that it cannot be removed. and is rotatably mounted.

The two anti-rotation parts 24 are provided point-symmetrically with respect to the central axis of the cap nut main body part 23, and include a movable part 24a and an extending part 24b.

The movable part 24a has an arc shape with an inner diameter slightly larger than the outer peripheral surface of the cap nut main body 23, and one end is attached to the wall surface of the cap nut main body 23 in a concentric circle with the outer wall surface of the cap nut main body 23. It is fixed to be. In addition, in the unloaded state, a gap of approximately equal width is formed between the movable portion 24a and the outer wall surface of the cap nut main body 23, and a force such as a finger is applied in the radial direction of the cap nut main body 23. When received, it elastically deforms around the fixed part in the direction of the applied force.
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 cap nut body portion 23 and outward from the edge of the cap nut body portion 23.

Next, a method for connecting the drain pipe joint 1 having the above-mentioned configuration and an operation of a connection structure for a drain pipe for air conditioning equipment using the drain pipe joint 1 will be described based on 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 part 22a of the second connection joint 20 has a male thread. After being inserted into the cylindrical portion 12, the cap nut 21 is rotated by hand to screw the cap nut main body portion 23 into the male threaded cylindrical portion 12. Along with this screwing, the spigot portion 22a advances toward the inside of the male threaded cylindrical portion 12. Further, when the cap nut body part 23 is screwed in until it rotates approximately 90 degrees, the extending part 24b is attached to the end edge of the flange body part 13a on the male threaded cylinder part 12 side near the short axis of the ellipse of the flange body part 13a. and moves in the direction of the flange 13 to a position that substantially coincides with the tip edge of the extending portion 24b.
When the cap nut 21 is further screwed in, the extending portion 24b is first received by the tapered surface of the locking protrusion 13b, and as screwing progresses, the flange is formed along the tapered surface due to elastic deformation of the movable portion 24a. gradually moving outward in the radial direction of 13.

When the cap nut main body 23 is screwed in until it is rotated approximately 180 degrees, the extending portion 24b climbs over the locking protrusion 13b, and the detent portion 24 is rotated by the elastic restoring force of the movable portion 24a. Restores the original shape along the outer circumferential surface. Therefore, even if the cap nut 21 attempts to rotate in the direction of loosening, the extending portion 24b contacts the locking surface of the locking protrusion 13b, and rotation in the direction of loosening is prevented. At the same time, the end face of the cap nut main body 23 is received by the flange 13, and further screwing is no longer possible.
In this way, the drain pipe joint 1 has a one-touch joint structure in which the first connection joint 10 and the second connection joint 20 each have a locking structure that allows them to be attached to and detached from each other.

In this embodiment, as shown in FIG. 1, the first connection joint 10 is connected to the drain pipe 31 of the air conditioner 3 using an adhesive via the drain hose 5, which is connected in advance to the drain pipe 31 of the air conditioner 3 using 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 adhesive. Thereafter, the first connection joint 10 and the second connection joint 20 can be connected, and thereby the work of connecting the drain pipe 31 and the flexible hose 4 can be easily performed without taking much effort or time. Since the connection work is thus facilitated, the work can be carried out efficiently, even if the air conditioner 3 is installed at a high place and difficult to work on, for example.
In addition, the first connection joint 10 and the second connection joint 20 can be connected and removed by fitting and screwing together by hand without using tools such as a screwdriver, so even after the connection has been made, labor-intensive work is not necessary. Both connection joints 10 and 20 can be easily separated without any trouble. Therefore, there is an advantage that maintenance or replacement of the flexible hose 4 can be carried out efficiently.

In addition, in the case of the present embodiment, 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 tools, so that the connection work can be shortened. It can be done easily and in time. It also has the advantage of being able to work in narrow spaces.

Furthermore, in this embodiment, by screwing together the female threaded part 21a of the cap nut 21 of the second connection joint 20 from the outside of the male threaded cylinder part 12 of the first connection joint 10, both the connection joints 10 and 20 are connected to each other. Can be easily joined.
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) is provided, as in the present embodiment. ), 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 piping structure of the drain pipe for air conditioning equipment configured in this way, the simple attachment/detachment structure facilitates work and has the effect of reducing labor and time.

The embodiments of the drain pipe connection structure and piping structure for air conditioning equipment according to the present invention have been described above, but the present invention is not limited to the above embodiments, and may be modified as appropriate without departing from the spirit thereof. 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 spout 22a of the joint body 22 of the second connection joint 20 is directly connected to one end 4a of the flexible hose 4, and the elbow 6 is connected to the spout 11 of the first connection joint 10. It is also possible to have a configuration.
In this case, the end 6a of the elbow 6 on the opposite side to the drain pipe joint 1 will be connected to the drain hose 5.

Furthermore, in this embodiment, the connecting joint has a structure in which the male threaded cylinder portion 12 and the flange 13 of the first connecting joint 10 are the locked parts, and the cap nut 21 of the second connecting joint 20 is the locking part. , it is not limited to this, and other structures can also be adopted. For example, in the present embodiment, the rotation of the cap nut 21 is stopped by the rotation stopper 24, but the rotation stopper 24 is omitted and the cap nut 21 is connected only by screwing the female threaded portion 21a of the cap nut 21. The structure may be different, or another structure that does not use the cap nut 21 may be used. For example, other detachable locking structures include a bayonet mechanism known in the art (Japanese Unexamined Patent Publication No. 2010-96241) in which a protrusion and a bayonet groove are fitted through a groove provided in an engagement wall; Just by inserting the tube into the tube insertion part, the expanding piece that expands the diameter of the tightening ring flies off, and the tightening ring elastically contracts, tightening the tube between it and the nozzle-shaped inner tube inserted into the tube. For example, there is a known one-touch connection structure (Japanese Patent Application Laid-open No. 2001-295974) which is designed to prevent the connector from slipping out and to stop water.

Further, in the embodiment described above, the first connecting joint 10 is provided with the externally threaded cylindrical portion 12 and the flange 13, and the second connecting joint 20 is provided with the cap nut 21, but the configurations may be reversed. That is, the first connecting joint 10 connected to the drain pipe 31 side may be configured to have a cap nut, and the second connecting 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 directly connect the drain pipe joint 1 to the drain pipe 31, making it possible to arrange the flexible hose 4 close 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 has the advantage that the state of application of the adhesive can be confirmed.

Further, the connection location of the drain pipe joint 1 is not limited to being between the drain pipe 31 and the flexible hose 4 as in this embodiment. In addition, as shown in FIG. 9, the drain pipe joint 1 includes a flexible hose 4 for discharging drain generated from a drain pipe 31 provided in the air conditioner 3 to the outside, and a flexible hose 4 on the air conditioner 3 side. It may be arranged between 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 connected. A connection structure is provided.
In FIG. 9, the elbow 6 is a known heat-insulating joint (Japanese Unexamined Patent Publication No. 2012-233675) having a heat-insulating layer, thereby eliminating the need to cover the outside of the joint with a heat-insulating material.
Furthermore, a connection point for the drain pipe joint 1 may also be provided between the flexible hose 4 and the end portion 4a on the side of the air conditioner 3, and 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 spirit 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 thread cylinder part (locked part)
13 Flange (locked part)
20 Second connection joint 21 Cap nut (locking part)
22 Joint body (joint pipe)
23 Cap nut body part 24 Stopper part 31 Drain pipe

Claims (2)

A connection structure for an air conditioning equipment drain pipe for connecting an air conditioner installed in the ceiling and a flexible hose,
comprising 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 removably provided,
The first connection joint is directly connected to a drain pipe of the air conditioner or a drain hose connected to the air conditioner with an adhesive and is transparent ;
Either one of the first connection joint and the second connection joint is provided with a locking part, and the other is provided with a locked part,
The locked portion includes two protrusions provided at symmetrical positions,
The locking portion includes two extending portions provided at symmetrical positions,
A connection structure for a drain pipe for an air conditioner, characterized in that when the first connection joint and the second connection joint are connected, a tip of the extension part is located closer to the air conditioner than the protrusion. A piping structure comprising an air conditioner installed in the ceiling, a flexible hose, a drain pipe, and the connection structure according to claim 1 .

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