JP2018054127A - Connection structure of drain pipe for air conditioning equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection joint with a detachable structure, to facilitate connection work, thereby reducing labor and time.SOLUTION: A connection structure of a drain pipe for air conditioning equipment is configured to connect a drain pipe 31 provided in an air conditioner 3 and a flexible hose 4 configured to discharge drain generated from the drain pipe 31 to the outside. The connection structure 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 first connection joint 10 and the second connection joint 20 are provided in a detachable manner.SELECTED DRAWING: Figure 1

Description

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

  Conventionally, in an air conditioner installed on the ceiling or the like of a room, the generated drain is led 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 the drain hose is interposed between the elbow pipe and the drain pipe. In general, the flexible hose is once started up from the elbow pipe and then discharged to the outside by a drain pipe or the like.

  Patent Document 1 discloses a first connection for connecting to a drain pipe of an air conditioning indoor unit, and a second connection for connecting to a drain lateral running pipe for guiding the drain discharged from the drain pipe to the outside. The structure provided with the hose part which continues to a part and the 1st connection part and the 2nd connection part, and has heat insulation 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 by patent document 1 etc., as connection parts other than a drain pipe, it is comprised by many pipe components, such as a drain hose, a flexible hose (hose part), and each connection joint, These are mutually They are connected by bonding 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), the end of the drain pipe or connection joint is inserted into the drain hose, and the connection part is connected to a metal band, etc. The fastening tool is configured to be tightened from the outside by a small screw portion provided on the fastening tool.

  When tightening using such a fastening tool such as a metal band, it is necessary to fasten a small screw part using a tool such as a screwdriver, which is a laborious and time consuming work. In addition, since it is not possible to easily disconnect a connection portion that has been once connected by using a fastener, not only a connection portion by adhesion, it takes time for maintenance of piping and replacement of piping materials. In the case of an air conditioner installed behind the ceiling, the work is performed at a high place, and therefore work using a tool such as a screwdriver has been particularly reduced in work efficiency. 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 that respect.

  The present invention has been made in view of the above-described problems, and by providing a connection joint with a detachable structure, the connection work can be facilitated, and labor and time can be reduced. The purpose is to provide.

  In order to achieve the above object, in the drain pipe connection structure for an air conditioner according to the present invention, a drain pipe provided in an air conditioner and a flexible hose for discharging the drain generated from the drain pipe to the outside are connected. A drain pipe connection structure for air conditioning equipment, comprising: a first connection joint connected to the air conditioner side; and a second connection joint connected to the flexible hose side, wherein the first connection joint and the first connection joint A two-connecting joint is detachably provided.

  Moreover, in the connection structure of the drain pipe for air conditioning equipment according to the present invention, the flexible hose for discharging the drain generated from the drain pipe provided in the air conditioner to the outside, and the end of the flexible hose opposite to the air conditioner side A drain pipe for air conditioning equipment for connecting a drain pipe connected to a section, a first connection joint connected to the flexible hose side, and a second connection connected to the drain pipe side And a first connecting joint and a second connecting joint are detachably provided.

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 connected to one end (or drain pipe) of the flexible hose. By connecting the joint, the first connection joint and the second connection joint can be connected thereafter, so that the connection work between the drain pipe and the flexible hose or the connection work between the flexible hose and the drain pipe can be performed with a tool. It can be done easily without using time and effort. Since the connection work is thus facilitated, for example, even if the air conditioner is provided at a high place and the work is difficult, the work can be performed efficiently.
In addition, since the first connection joint and the second connection joint are detachable, both connection joints can be easily detached without performing laborious work even after connection. Therefore, there is an advantage that the work can be efficiently performed even when the flexible hose is maintained or replaced.

  Moreover, in the connection structure of the drain pipe for air conditioning equipment according to the present invention, a locking portion is provided in one of the first connection joint and the second connection joint, and a locked portion is provided in the other, It is preferable that the locking portion and the locked portion have a one-touch joint structure that is detachable from each other.

  In this case, since the connection portion has a one-touch joint structure including the locking portion and the locked portion, the connection work can be performed in a shorter time and easily. In addition, there is an advantage that it is possible to work in a narrow place.

  Moreover, in the connection structure of the drain pipe for an air conditioning equipment according to the present invention, the locked portion is a male threaded cylinder portion protruding toward the other connecting joint side, and the locking portion is formed of the male threaded cylinder portion. It is a cap nut formed with a female screw that is screwed from the outside, and the cap nut is preferably provided so as to be rotatable around a joint pipe provided in the one connection joint.

By comprising in this way, both connection joints can be simply joined by screwing the female thread of the cap nut of the other connection joint from the outside of the external thread cylinder part of one connection joint.
Moreover, since the cap nut is rotatably provided around the joint pipe, the elbow is connected to at least one of the first connection joint and the second connection joint regardless of the direction of the elbow. The first connection joint and the second connection joint can be connected.

  According to the connection structure of the drain pipe for an air conditioning equipment of the present invention, by providing the connection joint of the detachable structure, the connection work becomes easy, 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. It is a perspective view which shows the structure of a drain pipe joint among the connection structures shown in FIG. 1, Comprising: It is a figure which shows the state before the connection of a 1st connection joint and a 2nd connection joint. It is a perspective view which shows the structure of a drain pipe joint, Comprising: It is a figure which shows the state which connected the 1st connection joint and the 2nd connection joint. It is a half 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 the 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 the drain piping and flexible hose by other embodiment.

  Hereinafter, a connection structure of a drain pipe for an air conditioning equipment according to an embodiment of the present invention will be described in detail based on the drawings.

  The connection structure of the air conditioner drain pipe according to the present embodiment shown in FIG. 1 discharges the drain pipe 31 provided in the air conditioner 3 as provided on the back of the ceiling and the drain generated from the drain pipe 31 to the outside. A drain pipe joint 1 for connecting a flexible hose 4 is provided. Here, as the flexible hose 4, for example, a soft or relatively hard vinyl chloride hose can be configured by a two-layered covered hose formed by coating the outer periphery of a heat insulating material such as urethane foam.

In the present 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 is connected and drainage is discharged through these pipes. The flexible hose 4 is arranged so as to stand up from the elbow 6 once.
Further, the drain hose 5, the drain fitting 1, and the elbow 6 are preferably covered with a heat insulating material (not shown) or provided with a heat insulating function, so that condensation can be prevented.

  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 (supporting part of reference numeral 61) are respectively suspended by the suspension material 8. It is suspended from the surface T. In addition, these hanging positions and the number of hanging places 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. The joint 10 and the 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 is connected to the drain hose 5 on the drain pipe 31 side at one end. A portion 11 is provided, and the other end is provided with a male screw cylinder portion 12 (locked portion) and a flange 13 (locked portion).

The male threaded cylinder portion 12 has a double thread structure composed of two helical protrusions 12a each having a pitch of approximately 1 pitch with the start end shifted by 180 degrees, and a cap nut 21 (locking) of the second connection joint 20 described later. Part) of the female thread 21a (see FIG. 7).
The flange 13 includes an elliptical flange main body 13a and two locking projections 13b provided at symmetrical positions.

  Each of the locking projections 13b has a locking surface at a position deviated from the major axis of the ellipse of the flange main body 13a by about 45 degrees, and the screw tightening direction of the male screw cylinder 12 from the tip of the locking surface A tapered surface is provided on the opposite side so as to gradually approach the flange body 13a and be flush with the flange body 13a at the end. That is, the locking projection 13b projects 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) on which the cap nut 21 is rotatably fitted, It has.

The joint body 22 is provided with an opening portion 22a at one end and a connection portion 22b at the other end.
The insertion port 22 a is inserted into the male screw cylinder 12, and an O-ring 22 c is fitted around it, and is in close contact with the inner surface of the male screw cylinder 12 in a liquid-tight manner. 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 detent portions 24.
The cap nut main body portion 23 is formed with a double thread 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 faces the tip of the differential portion 22a. And is rotatably mounted.

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

The movable portion 24a has an arc shape having an inner diameter slightly larger than the outer peripheral surface of the cap nut main body portion 23, and one end is concentric with the outer wall surface of the cap nut main body portion 23 on the wall surface of the cap nut main body portion 23. It is fixed to become. In addition, the movable portion 24a is formed with a gap having a substantially uniform width with the outer wall surface of the cap nut main body portion 23 in a no-load state, and force is applied with a finger or the like in the radial direction of the cap nut main body portion 23. When it is received, it is elastically deformed in the direction in which force is applied around the fixed part.
The extending portion 24b is provided so as to extend from the open end of the movable portion 24a in parallel to the central axis of the cap nut main body portion 23 and outward from the end edge of the cap nut main body portion 23.

Next, the effect | action of the connection method of the drain pipe joint 1 of the structure mentioned above and the connection structure of the drain pipe for air-conditioning equipment using the drain pipe joint 1 is demonstrated based on drawing.
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 connection port 22 a of the second connection joint 20 is externally threaded. After being inserted into the tube portion 12, the cap nut 21 is manually rotated to screw the cap nut main body portion 23 into the male screw tube portion 12. Along with this screwing, the opening 22a enters toward the inside of the male screw cylinder 12. Further, when the cap nut main body portion 23 is screwed in until it is rotated about 90 degrees, the extension portion 24b is an edge of the flange main body portion 13a on the male screw cylinder portion 12 side in the vicinity of the short axis of the ellipse. And moves in the direction of the flange 13 to a position substantially coinciding with the tip edge of the extending portion 24b.
When the extension nut 24b is further screwed in, the extension nut 24b is first received by the taper surface of the locking projection 13b. As the screwing progresses, the flange 24 is formed along the taper surface by elastic deformation of the movable portion 24a. 13 gradually moves outward in the radial direction.

Then, when the cap nut main body portion 23 is screwed in until it rotates approximately 180 degrees, the extension portion 24b gets over the locking projection 13b, and the rotation preventing portion 24 of the cap nut main body portion 23 by the elastic restoring force of the movable portion 24a. The original shape along the outer peripheral surface is restored. Therefore, even if the cap nut 21 tries to rotate in the screw loosening direction, the extended portion 24b comes into contact with the locking surface of the locking projection 13b, thereby preventing 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 provided with 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 bonded with an adhesive via a drain hose 5 that is previously connected to the drain pipe 31 of the air conditioner 3 with a metal band, an adhesive, or the like. Connect by gluing. At the same time, the second connecting joint 20 integrally provided with the elbow 6 is connected to one end 4a of the flexible hose 4 by adhesion. Then, the 1st connection coupling 10 and the 2nd connection coupling 20 can be connected, and, thereby, the connection operation of the drain pipe 31 and the flexible hose 4 can be easily performed without taking time and effort. Since the connection work is thus facilitated, for example, even if the air conditioner 3 is provided at a high place and the work is difficult, the work can be performed efficiently.
In addition, since the first connecting joint 10 and the second connecting joint 20 can be attached and detached by hand fitting and screwing without using a tool such as a screwdriver, it is necessary to perform troublesome work even after connection. The 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, the drain pipe joint 1 has a one-touch joint structure in which the connection portion of the first connection joint 10 and the second connection joint 20 can be attached and detached without using a tool. It can be done in time and easily. In addition, there is an advantage that it is possible to work in a narrow place.

Furthermore, in this Embodiment, both the connection couplings 10 and 20 are connected by screwing the female thread part 21a of the cap nut 21 of the 2nd connection coupling 20 from the outer side of the external thread cylinder part 12 of the 1st connection coupling 10. FIG. 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 used) 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 of the drain pipe for air conditioning equipment configured as described above, the simple attachment / detachment structure facilitates the operation, and has the effect of reducing labor and time.

  As mentioned above, although embodiment of the connection structure of the drain pipe for air-conditioning equipment by this invention was described, this invention is not limited to said embodiment, It can change suitably in the range which does not deviate from the meaning. .

  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 joint 22 a of the joint body 22 of the second connection joint 20 is directly connected to one end 4 a of the flexible hose 4, and the elbow 6 is connected to the joint 11 of the first connection joint 10. A configuration is also possible. In this case, the end 6 a of the elbow 6 opposite to the drain pipe joint 1 is connected to the drain hose 5.

  Moreover, in this Embodiment, although it is set as the connection joint of the structure which used the external thread cylinder part 12 and the flange 13 of the 1st connection joint 10 as a to-be-latched part, and used the cap nut 21 of the 2nd connection joint 20 as a locking part. However, the present invention 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 locked by the anti-rotation portion 24, but the anti-rotation portion 24 is omitted and joined only by screwing of the female screw portion 21 a of the cap nut 21. The structure may be sufficient, and it is good also as another structure which does not use the cap nut 21. FIG. For example, as another detachable locking structure, a bayonet mechanism known in the art (Japanese Patent Laid-Open No. 2010-96241) in which a protruding portion and a bayonet groove are fitted through a groove provided in an engagement wall, or connected. Just by inserting the tube into the tube insertion section, the expanded piece with the expanded diameter of the tightening ring will fly, the tightening ring will be elastically contracted, and the tube will be tightened between the nozzle-shaped inner tube inserted into the tube For example, there is a known one-touch connection structure (Japanese Patent Laid-Open No. 2001-295974) designed to prevent detachment and water.

  Further, in the above-described embodiment, the male threaded cylinder portion 12 and the flange 13 are provided in the first connection joint 10 and the cap nut 21 is provided in the second connection joint 20. 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 include a male threaded cylinder portion and a flange.

  Furthermore, the drain hose 5 can be omitted, and the drain pipe joint 1 can be directly connected to the drain pipe 31, and the flexible hose 4 can be disposed close to the air conditioner 3, so that the connection structure can be made compact. be able to. In this case, the first connecting joint 10 and the drain pipe 31 can be connected by adhesive bonding using an adhesive.

  Furthermore, the first connection joint 10 can be made a transparent member, which has an advantage that the application state of the adhesive can be confirmed.

Moreover, 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 the present embodiment. In addition to this, as shown in FIG. 9, the drain pipe joint 1 includes 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. You may arrange | position between the drain piping 7 connected to the edge part 4b on the opposite side. In this case, the second connecting joint 20 connected to the flexible hose 4 side and the first connecting joint 10 connected to the drain pipe 7 side are provided, and the first connecting joint 10 and the second connecting joint 20 are detachable. The connection structure is provided. In FIG. 9, the elbow 6 is a well-known (Japanese Unexamined Patent Publication No. 2012-233675) heat insulating joint provided with a heat insulating layer, so that the trouble of covering the outside of the joint with a heat insulating material can be saved.
Furthermore, it is good also as a structure which provided the connection location of the drain pipe joint 1 between the flexible hose 4 and the edge part 4a by the side of the air conditioner 3, and provided the connection location of the drain pipe coupling 1 in the both ends of the flexible hose 4.

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

DESCRIPTION OF SYMBOLS 1 Drain pipe joint 3 Air conditioner 4 Flexible hose 5 Drain hose 6 Elbow 7 Drain piping 10 1st connection joint 12 Male thread cylinder part (locked part)
13 Flange (locked part)
20 Second connection joint 21 Cap nut (locking part)
22 Fitting body (Fitting pipe)
23 Cap nut body 24 Non-rotating part 31 Drain pipe

In order to achieve the above object, the drain pipe connection structure for an air conditioner according to the present invention is a connection structure of an air conditioner drain pipe for connecting an air conditioner and a flexible hose, and is connected to the air conditioner side. A first connection joint and a second connection joint connected to the flexible hose side, wherein the first connection joint and the second connection joint are detachably provided , the first connection joint and the second connection joint. Either one of the connection joints is provided with a locking portion, the other is provided with a locked portion, the locked portion includes a locking protrusion, and the locking portion includes an extension portion, When the first connection joint and the second connection joint are connected, the extension portion is located between the locking projections .

Moreover, in the connection structure of the drain pipe for an air conditioning equipment according to the present invention, the extending portion has a protruding portion that protrudes toward the central axis of the locking portion, and the locking protrusion has both end portions thereof. It is preferable that a locking surface is provided, and the protruding portion is positioned between the locking surfaces of the locked portion and locked to the locking protrusion.

Claims (4)

A connection structure of a drain pipe for air conditioning equipment for connecting a drain pipe provided in an air conditioner and a flexible hose for discharging drain generated from the drain pipe to the outside,
A first connection joint connected to the air conditioner side, and a second connection joint connected to the flexible hose side,
A connection structure for a drain pipe for an air conditioner, wherein the first connection joint and the second connection joint are detachably provided. Air conditioning equipment for connecting a flexible hose for discharging drain generated from a drain pipe provided in an air conditioner to the outside, and a drain pipe connected to an end of the flexible hose opposite to the air conditioner side A drain pipe connection structure,
A first connection joint connected to the flexible hose side and a second connection joint connected to the drain pipe side;
A connection structure for a drain pipe for an air conditioner, wherein the first connection joint and the second connection joint are detachably provided.   One-touch in which 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, and the locking part and the locked part can be attached to and detached from each other. The connection structure of the drain pipe for an air conditioning equipment according to claim 1 or 2, wherein a joint structure is formed. The locked portion is a male threaded cylindrical portion protruding toward the other connection joint side,
The locking part is a cap nut formed with a female screw that is screwed from the outside of the male screw cylinder part,
The drain pipe connection structure for an air conditioning equipment according to claim 3, wherein the cap nut is rotatably provided around a joint pipe provided in the one connection joint.

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