JP6856476B2 - How to maintain the drain hose connection adapter, air conditioning system, and drain piping - Google Patents

Description

The present invention relates to an adapter for connecting a drain hose, an air conditioning system using the adapter for drain piping, and a method for maintaining the drain piping in this air conditioning system.

Generally, when the indoor unit of the air conditioner forming the air conditioning system is a ceiling-embedded type or a ceiling-suspended type, the drain collected in the drain pan is once pumped up by a drain pump and then laid behind the ceiling. It is discharged to the outside by a natural outflow method using a drain pipe with a downward slope.

However, depending on the installation location of the indoor unit, it may be difficult to discharge the drain pumped up by the drain pump by the natural outflow method. For example, there are various structures behind the ceiling. Therefore, the drain pipe needs to be laid by detouring above or below these structures, and the lift of the drain pump attached to the drain pan may be insufficient. Further, even if the natural outflow method is to be adopted, the natural outflow method may not be adopted if the indoor unit is installed at a place away from the outer wall of the building.

In such a case, as shown in FIG. 9, the drain pump kit 103 is connected to the tip of the drain discharge pipe 102 from the indoor unit 101. The drain pump kit 103 includes a drain accommodating portion having a predetermined volume capable of accommodating the drain generated in the indoor unit 101, and a drain pump for discharging the drain contained in the drain accommodating portion (not shown). It is configured. Further, the drain pump kit 103 leads out a soft drain hose 104 having a heat insulating function for draining the drain by the drain pump in an inverted U shape. The tip of the derived soft drain hose 104 is connected to a socket in the cheese joint 105 that opens upward. In FIG. 9, reference numeral F is a ceiling.

When connecting the soft drain hose 104 to the socket of the cheese joint 105, a short rigid pipe 106 is connected to the socket of the cheese joint 105 having a heat insulating function by an adhesive, and the tip of the short pipe 106 is connected. The adapter 107 is attached to. The adapter 107 has a bamboo shoot joint on one side, and the tip of the soft drain hose 104 is inserted into the bamboo shoot joint, whereby the soft drain hose 104 is connected to the adapter 107. Further, in the adapter 107, the opposite side of the bamboo shoot joint portion is formed in the socket portion. This socket portion is placed on the outside of one end of the short pipe 106, and the socket portion is adhesively connected to the short pipe 106 by an adhesive. When inserting the bamboo shoot joint into the soft drain hose 104, the heat insulating material at the tip of the soft drain hose 104 into which the bamboo shoot joint is inserted is removed, and after the bamboo shoot joint is inserted, the outside is clamped. It is tightened and fixed. In this way, after the soft drain hose 104 and the cheese joint 105 are connected via the short pipe 106 and the adapter 107, the heat insulating material is wrapped around the entire outer circumference around the adapter 107 including the short pipe 106. It was.

In the drain pipe of the conventional air conditioning system, a pipe 108 having a short rigidity is connected to one of the horizontal sockets of the cheese joint 105, and maintenance such as cleaning of the drain pipe is performed at the tip of the pipe 108. The opening 109 was provided. The maintenance opening 109 includes a 45 ° elbow connected to the tip of the pipe 108, and a cap member 110 detachably provided at the other receiving port of the 45 ° elbow. That is, the maintenance opening 109 is normally equipped with a cap member 110, and is configured so that cleaning or the like can be performed by removing the cap member 110 during maintenance.

Patent Document 1 and Non-Patent Document 1 are examples of drain piping using the drain pump kit described above. Further, Patent Document 2 is an example of a drain pipe using a maintenance opening.

Japanese Patent Application Laid-Open No. 2003-97450, FIG. Japanese Patent No. 5286071

Publication name: "Drain-up kit, drain pump kit installation / wiring procedure", Publisher: OK Equipment Co., Ltd., Publication date: December 4, 2015, Related parts: Page 74

However, in the drain piping of the conventional air conditioning system, when connecting the drain pump kit, a heat insulating material must be wrapped around the entire outer circumference of the short rigid piping 106 and the adapter 107 in the dark and narrow space behind the ceiling. It was good. Further, in the conventional adapter 107, a short rigid pipe 106 must be connected to the cheese joint 105, and a heat insulating material must be wound around the outer circumference of the short pipe 106. As described above, in the drain piping of the air conditioning system using the conventional adapter 107, there is a problem that the configuration becomes complicated and the work man-hours increase.

The present invention has been made in view of the problems in the prior art, and provides an adapter for connecting a drain hose and an air conditioning system with improved workability of the drain pipe, and a simple method for maintaining the drain pipe. The purpose is to provide.

[1] A drain hose connection adapter that solves the above problems includes a main body member having a connection portion that is inserted and bonded to a receiving port of a pipe joint and a union thread portion that is formed adjacent to one end of the connection portion. A hose port having a bamboo screw joint that is inserted into a soft drain hose to be connected, a seal member that seals between the main body member and the hose port, and the hose port that seals the main body member via the seal member. The main body member and the hose port are provided with a union nut screwed into the union threaded portion for press-welding and connecting the hose, and the union nut is screwed into the union threaded portion and connected to the main body member and the hose port. In the state, the heat insulating air layer is formed on the outer peripheral portion other than the bamboo hose joint portion.

According to the drain hose connection adapter having such a configuration, there is no need to wrap a heat insulating material around the outer peripheral side other than the bamboo shoot joint, and there is no need to connect a short pipe between the adapter and the pipe joint. Piping can be simplified.

[2] Further, the hose port has a base formed on the main body member side of the bamboo nut joint portion, and the main body member is formed on the inner peripheral side of the union threaded portion. It has a receiving portion for receiving a part of the receiving portion and a supporting surface for supporting the hose opening formed at the bottom of the receiving portion, and the base portion of the hose opening thrusts against the supporting surface via the sealing member. The joint flange portion to be combined is formed at the end portion, and the insertion portion to be inserted into the receiving portion and the bag-shaped lid portion of the union nut formed adjacent to the Takenoko joint portion side of the insertion portion. A double wall having an engaged union flange portion and a connecting portion connecting the union flange portion and the Takenoko joint portion, and the connecting portion and the connecting portion each having an annular heat insulating air layer. The receiving portion and the inserting portion are formed on the outer peripheral wall of the receiving portion, and the inner peripheral surface of the receiving portion and the insertion portion are connected to each other in a state where the main body member and the hose port are connected by fastening the union nut. An annular heat insulating air layer may be formed between the outer peripheral surface and the outer peripheral surface.

With such a configuration, in view of the normal connection state in which the soft drain hose having a heat insulating function is connected to the receiving port of the pipe joint from the top to the bottom, the connection portion of the main body member and the hose opening are connected. It is possible to form the heat insulating air layer of the portion in a state of being open downward, and the main body member and the hose mouth can be easily manufactured. Further, in a state where the main body member and the hose port are connected by fastening the union nut, an annular heat insulating air layer is formed between the inner peripheral surface of the receiving portion and the outer peripheral surface of the insertion portion, so that the hose port is formed. It is not necessary to form a heat insulating air layer in the outer peripheral wall of the insertion portion of the hose, and the structure of the hose port is simplified.

[3] Further, the seal member may be an O-ring.
With such a configuration, the support surface and the joint flange portion may be opposed to each other via an O-ring, and a simple configuration can be achieved.

[4] Further, it is preferable that the main body member has a partition flange portion formed between the connecting portion and the union threaded portion.
According to such a configuration, when the connecting portion is adhered to the receiving port, the adhesive protruding from the receiving port can be prevented from spreading upward by the partition flange portion.

[5] Further, in this air conditioning system, the drain pump kit connected to the tip of the drain pipe of the indoor unit of the air harmonizer and the drain housed in the drain accommodating portion of the drain pump kit are discharged by the drain pump. An air conditioning system including a drain pipe having a soft drain hose for connecting the soft drain hose and an elbow as a pipe joint for connecting the soft drain hose. The elbow has one receiving port facing upward. The soft drain hose is arranged so as to open toward the drain hose, and is led out from the drain pump kit in an inverted U shape so that the tip portion is bent downward and faces the socket. The hose and the receiving port of the elbow are detachably connected via any of the drain hose connecting adapters.

According to such a configuration, the soft drain hose for draining the drain from the drain pump kit is arranged in an inverted U shape as in the conventional case, and the soft drain hose can be directly connected to the elbow via the adapter. Good. In addition, since the main body member and the hose port of the drain hose connection adapter are separated by loosening the union nut, the opening of the main body member from which the hose port is removed can be used as a port instead of the conventional maintenance port. .. Therefore, it is not necessary to interpose a short pipe between the flexible drain hose and the pipe joint as in the conventional case, it is not necessary to separately provide a maintenance port, and the outer circumference of the drain hose connection adapter other than the bamboo shoot joint portion. There is no need to wrap a heat insulating material around the part, which simplifies the work.

[6] Further, in the maintenance method of the drain pipe in this air conditioning system, the union nut is loosened, the soft drain hose is separated from the elbow, and the socket of the elbow from which the soft drain hose is separated is connected. It is used as a maintenance opening for cleaning the drain pipe, and after the maintenance is completed, the soft drain hose is reconnected to the elbow by screwing the union nut into the union screw portion again. is there.

According to such a configuration, maintenance can be easily performed even in an air conditioning system in which a maintenance port is not separately provided in the drain pipe.

According to this drain hose connection adapter and the air conditioning system using the adapter, the workability of the drain pipe is improved. Further, according to the maintenance method of the drain pipe, maintenance of the drain pipe can be easily performed without providing a maintenance opening in the drain pipe.

The schematic block diagram of the drain pipe in the air conditioning system which concerns on embodiment of this invention. A perspective view of the drain hose connection adapter in the same drain pipe. Vertical cross-sectional view around the drain hose connection adapter in the drain pipe. A vertical sectional view of an elbow as a pipe joint to which the drain hose connection adapter is connected. An exploded perspective view of the elbow. Vertical cross-sectional view of the drain hose connection adapter used for the drain pipe. An exploded perspective view of the adapter for connecting the drain hose. It is a cross-sectional view of the component parts of the drain hose connection adapter, (A) is a vertical cross-sectional view of a union nut, (B) is a vertical cross-sectional view of a hose mouth, and (C) is a vertical cross-sectional view of a main body member. Schematic block diagram of drain piping in a conventional air conditioning system.

First, the air conditioning system according to the embodiment of the present invention, particularly the drain pipe thereof, will be described. It should be noted that the present invention is not limited to the examples described below, and is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims. To.

The air conditioning system shown in FIG. 1 is for installing a ceiling-embedded indoor unit 1. In this air conditioning system, the drain accumulated in the indoor unit 1 is pumped up, discharged to the drain accommodating portion (not shown) of the drain pump kit 3 via the rigid pipe 2, and stored in the drain pump kit 3. The drain pump (not shown) is used to discharge the drain accumulated in the drain accommodating part to the outside. In FIG. 1, reference numeral F is a ceiling.

The drain pipes for discharging the drain from the drain pump kit 3 to the outside are a heat-resistant soft drain hose 4 led out from the drain pump kit 3 in an inverted U shape and a rigid drain pipe 5 laid toward the outside. And have. An elbow 6 as a pipe joint is attached to the inlet of the rigid drain pipe 5 on the drain pump kit 3 side.

As shown in FIG. 1, the tip of the soft drain hose 4 derived from the drain pump kit 3 faces downward and is connected to an elbow 6 having a heat insulating function as a pipe joint. As shown in FIGS. 2 and 3, the flexible drain hose 4 and the elbow 6 are detachably connected to each other by using the drain hose connection adapter 7.

As shown in FIGS. 2 and 3, the soft drain hose 4 is generally formed by a soft inner pipe 4a and a soft coating layer 4b having a heat insulating function for covering the outer surface thereof.
Similarly, the rigid drain pipe 5 is generally composed of a rigid pipe body 5a and a coating layer 5b that covers the outer surface of the pipe body 5a. The pipe body 5a is made of a hard polyvinyl chloride resin material, and the coating layer 5b is made of a closed-cell vinyl chloride foam resin material.

As shown in FIGS. 4 and 5, the elbow 6 as a pipe joint is provided with two sockets 6Aa configured to allow the rigid drain pipe 5 to be inserted and to be connected by an adhesive. , The joint body 6A and the cover member 6B covering the outside of the joint body 6A are formed.

The joint body 6A is formed by connecting two receiving ports 6Aa with an L-shaped body portion 6Ab. At the bottom of the receiving port 6Aa, a hole having the same diameter as the inner diameter of the rigid drain pipe 5 connected to the communication passage in the body portion 6Ab is opened, and a wall portion for supporting the rigid drain pipe 5 is formed around the hole. Has been done. Further, a donut-shaped heat insulating plate 6C for elastically supporting the rigid drain pipe 5 and preventing the elbow 6 from being cooled by the drain is adhered to the wall portion. The outer peripheral wall of the body portion 6Ab is formed to be thinner than the outer diameter of the receiving port 6Aa so as to form a concave shape from the outer peripheral wall of the receiving port 6Aa.

As shown in FIG. 5, the cover member 6B is divided into a first cover 6Ba and a second cover 6Bb in a cross section passing through an L-shaped pipe shaft, and is bonded by an adhesive at the butt surface. The end portion on the receiving port side is adhered to the outer peripheral surface of the receiving port 6Aa with an adhesive. With this configuration, the heat insulating air layer 6D is formed so as to surround the outer periphery of the body portion 6Ab of the joint body 6A (see FIG. 4).

As shown in FIGS. 6 and 7, the drain hose connecting adapter 7 includes a main body member 10 connected to the receiving port 6Aa of the elbow 6 as a pipe joint, and a connecting portion of the soft drain hose 4 to be connected. The hose port 20 and the union nut 30 for pressing and connecting the hose port 20 to the main body member 10 are provided. Further, the drain hose connection adapter 7 has an O-ring 40 as a sealing member for sealing between the main body member 10 and the hose port 20. The hose port 20 has a main body member side as a base portion 21, and a bamboo shoot joint portion 22 inserted into the inside of the soft drain hose 4 is formed at the tip thereof as a connecting portion of the soft drain hose 4.

As shown in FIGS. 7 and 8 (C), the main body member 10 has a connecting portion 11 that is inserted and adhered to the receiving port 6Aa of the elbow 6, and a union screw formed adjacent to one end of the connecting portion 11. A portion 12, a receiving portion 13 formed on the inner peripheral side of the union threaded portion 12 for receiving a part of the base portion 21, and a supporting surface 14 formed on the bottom of the receiving portion 13 for supporting the hose port 20. Have. An O-ring groove 41 for mounting the O-ring 40 is formed on the support surface 14. Further, in the main body member 10, a partition flange portion 15 is formed between the connecting portion 11 and the union screw portion 12.

As shown in FIGS. 7 and 8B, the base portion 21 of the hose opening 20 is formed so as to be adjacent to the insertion portion 21A inserted into the receiving portion 13 and the bamboo shoot joint portion 22 side of the insertion portion 21A. It has a union flange portion 21B engaged with a bag-shaped lid portion of the union nut 30, and a connecting portion 21C connecting the union flange portion 21B and the bamboo shoot joint portion 22. A joint flange portion 21Aa is formed at the end of the insertion portion 21A so as to be abutted against the support surface 14 via an O-ring 40 as a sealing member.

As shown in FIGS. 7 and 8 (A), the union nut 30 has a knurl 31 (see FIG. 7) having a groove in the pipe axial direction on the outer peripheral portion thereof, and a union threaded portion 12 on the bag-shaped inner side wall. A female screw portion 32 to be screwed into the screw portion 32 is formed. Further, the union nut 30 is formed with a stepped engaging portion 33 that is engaged with the stepped engaging portion of the union flange portion 21B on the bag-shaped lid portion.

As shown in FIG. 8C, an annular heat insulating air layer 11a is formed on the outer peripheral wall of the connecting portion 11. Further, as shown in FIG. 8B, an annular heat insulating air layer 21Ca is formed on the outer peripheral wall of the connecting portion 21C.

Further, as shown in FIG. 3, the receiving portion 13 and the inserting portion 21A are connected to the inner peripheral surface of the receiving portion 13 and the inserting portion in a state where the main body member 10 and the hose port 20 are connected by fastening the union nut 30. An annular heat insulating air layer 13a is formed between the outer peripheral surface of the 21A and the outer peripheral surface of the 21A.

(Action)
As the operation of the drain hose connection adapter 7 according to the present embodiment, the connection procedure between the soft drain hose 4 and the elbow 6 using the drain hose connection adapter 7 is described, and the work at the time of maintenance of the drain pipe is described. The method will be described.

First, the drain hose connection adapter 7 to be used is prepared in a state in which the main body member 10, the hose port 20, the union nut 30, and the O-ring 40 as a seal member are disassembled. Next, the main body member 10 is attached to the receiving port 6Aa that opens upward. In this mounting, the connecting portion 11 is inserted with the adhesive applied to at least one of the outer peripheral surface of the connecting portion 11 and the receiving port 6Aa that opens above the elbow 6. The insertion dimension of the connecting portion 11 is a dimension that allows the heat insulating plate material 6C to bend to the state shown in FIG.

Whether or not such a state has occurred is determined by the fact that the joint body 6A and the cover member 6B of the elbow 6 are formed of a transparent or translucent member, and the heat insulating material is not wound around the outer circumference of the elbow 6. Adhesion work can be performed while visually checking from the outside of the. Then, by holding the position in this state, the main body member 10 is attached to the receiving port 6Aa of the elbow 6.

The adhesive used when joining the connecting portion 11 to the receiving port 6Aa with an adhesive may leak from the receiving port 6Aa during the bonding work. However, the partition flange portion 15 formed between the connecting portion 11 of the main body member 10 and the union screw portion 12 prevents the adhesive from diffusing upward due to such leakage.

On the other hand, the hose port 20 is attached to the soft drain hose 4 led out from the drain pump kit 3 in an inverted U shape. In this attachment, the heat-insulating soft coating layer at the tip of the soft drain hose 4 is peeled off so that the bamboo shoot joint 22 can be easily inserted into the tip. Next, the union nut 30 is temporarily inserted into the connecting portion 21C of the hose opening 20, the bamboo shoot joint portion 22 of the hose opening 20 is inserted into the tip portion of the soft drain hose 4, and the tip portion of the soft drain hose 4 is further inserted. Tighten with a clamp bracket (not shown). Then, a band-shaped heat insulating material is wrapped around the tip of the clamp metal fitting in a tightened state. In this way, the hose port 20 is attached to the soft drain hose 4.

Next, the hose port 20 attached to the tip of the soft drain hose 4 and the main body member 10 attached to the receiving port 6Aa of the elbow 6 are connected. In this connection, the O-ring 40 is first mounted on the support surface 14 of the main body member 10. Then, the insertion portion 21A of the base portion 21 at the hose opening 20 is inserted into the receiving portion 13 of the main body member 10. When the union nut 30 is tightened to the union screw portion 12 of the main body member 10 in such a state, the joint flange portion 21Aa of the insertion portion 21A is in a state of being pressed against the support surface 14 via the O-ring 40, and the union nut 30 is pressed against the main body member 10. The hose port 20 is connected.

Next, in the air conditioner according to the present embodiment, a work method for performing maintenance such as cleaning of the drain pipe by using the drain hose connection adapter 7 will be described.
In the air conditioner according to the present embodiment, when the drain pipe is maintained, the union nut 30 of the drain hose connection adapter 7 is loosened. In this way, the hose port 20 attached to the tip of the soft drain hose 4 can be separated from the main body member 10 attached to the receiving port 6Aa of the elbow 6. Therefore, since the receiving portion 13 of the main body member 10 is in an open state, the same maintenance of the drain pipe as before is performed through the opening of the main body member 10 that occurs after the hose port 20 is removed from the receiving portion 13. Can be done.

(Effect of embodiment)
Since the drain hose connection adapter 7 and the air conditioning system using the adapter 7 according to the present embodiment are configured as described above, the following effects can be obtained.

(1) When a pipe joint having a heat insulating function (for example, elbow 6) is used as the pipe joint and a soft drain hose 4 having a heat insulating material is connected to the pipe joint, the tip of the soft drain hose 4 is connected. The portion where the heat insulating material is cut off is connected so as to cover the bamboo hose joint portion 22, and the outer periphery thereof is tightened with a clamp metal fitting. Then, by wrapping the heat insulating material only around the portion where the clamp metal fitting is tightened, it is possible to form a drain pipe having a heat insulating function in the entire drain hose connecting adapter 7.

(2) By loosening the union nut 30 of the drain hose connection adapter 7, it can be attached to the tip of the soft drain hose 4 without damaging the soft drain hose 4, the drain hose connection adapter 7, etc. The hose port 20 in the closed state can be separated from the main body member 10 in the state of being attached to the receiving port 6Aa of the elbow 6. As a result, the receiving port of the main body member 10 can be used as a maintenance opening for the drain pipe. Therefore, it is not necessary to separately provide a maintenance port in the drain pipe, and the drain pipe can be simplified.

(3) Since the drain hose connection adapter 7 is configured to open the heat insulating air layer 11a of the connecting portion 11 of the main body member 10 and the heat insulating air layer 21Ca of the connecting portion 21C of the hose port 20 downward. , The main body member 10 and the hose port 20 can be easily manufactured.

(4) In a state where the main body member 10 and the hose port 20 are connected by fastening the union nut 30, an annular heat insulating air layer 13a is formed between the inner peripheral surface of the receiving portion 13 and the outer peripheral surface of the insertion portion 21A. Since it is formed, it is not necessary to form a heat insulating air layer in the outer peripheral wall of the insertion portion 21A, and the structure of the hose port 20 is simplified.

(5) Since the seal joint between the support surface 14 of the main body member 10 and the joint flange portion 21Aa of the hose port 20 is opposed to each other via the O-ring 40, the connection structure between the main body member 10 and the hose port 20 is formed. It can be simplified and done accurately.

(6) Since the partition flange portion 15 is formed between the connecting portion 11 of the main body member 10 and the union threaded portion 12, the adhesive applied to bond the connecting portion 11 to the receiving port 6Aa is a union. Since it does not squeeze out to the screw portion 12 side and expand, it does not interfere with the screwing of the union nut 30 and does not deteriorate the appearance.

(7) In the air conditioning system according to the present embodiment, since the drain hose connection adapter 7 for connecting the soft drain hose 4 is directly connected to the elbow 6 as a pipe joint, the drain hose connection adapter 7 is connected. There is no need to connect a short rigid pipe between the pipe joint and the pipe joint as in the past. Therefore, a short rigid pipe is not required, the drain pipe is simplified, and the workability of the drain pipe is simplified.

(Modification example)
The description of the embodiment is an example of a possible mode of the pipe joint and the air conditioning system according to the present invention, and is not limited to the mode. In addition, a form in which at least two modifications that do not contradict each other may be combined may be used.

(1) According to the drain hose connecting adapter 7 according to the embodiment, the connecting portion 11 and the connecting portion 21C are configured to open the lower portions of the heat insulating air layers 11a and 21Ca. The air layers 11a and 21Ca may be hollow heat insulating air layers that do not open the lower portion.

(2) In the drain hose connection adapter 7 according to the embodiment, the inner peripheral surface of the receiving portion 13 and the outer peripheral surface of the inserting portion 21A are connected to the main body member 10 and the hose port 20 by fastening the union nut 30. An annular heat insulating air layer 13a was formed between the surface and the surface. However, instead of the heat insulating air layer 13a, a hollow heat insulating air layer may be provided on the wall of the insertion portion 21A at the base 21 of the hose port 20.

(3) In the air conditioning system according to the above embodiment, the elbow 6 is used as a pipe joint having a heat insulating function, but the pipe joint is not limited to this pipe joint, and a cheese joint or a Y-shaped pipe joint is used. , It is also possible to change to a pipe fitting with other types of heat insulating functions such as elbows with different diameters.

(4) In the drain hose connection adapter 7 according to the embodiment, the O-ring 40 is used as a sealing member for sealing between the support surface 14 of the main body member 10 and the joint flange portion 21Aa of the hose port 20. , This may be changed to another sealing member such as packing.

(5) In the air conditioning system according to the embodiment, the maintenance opening is not provided separately, but the present invention is not limited to this, and the maintenance opening may be provided separately.

(6) In the air conditioning system according to the embodiment, a maintenance opening for cleaning the drain pipe may be provided separately. For cleaning the drain pipe in this case, a maintenance opening provided separately may be used, or the union nut 30 of the drain hose connection adapter 7 is removed, and the receiving portion 13 attached to the receiving port 6Aa of the elbow 6 is used. The opening may be used.

1 Indoor unit 2 (Short) piping 3 Drain pump kit 4 Soft drain hose 4a Inner pipe 4b Soft coating layer 5 Rigid drain piping 5a Pipe body 5b Coating layer 6 Elbow 6A Fitting body 6Aa Receptacle 6Ab Body 6B Cover member 6Ba 1st cover 6Bb 2nd cover 6C Insulation air layer 7 Drain hose connection adapter 10 Main body member 11 Connection part 11a Insulation air layer 12 Union screw part 13 Receiving part 13a Insulation air layer 14 Support surface 15 Partition Flange part 20 Hose port 21 Base part 21A Insertion part 21Aa Joint flange part 21B Union flange part 21C Connection part 21Ca Insulation air layer 22 Takenoko joint part 30 Union nut 31 Lauret 32 Female thread 33 Engagement part 40 O ring 41 O ring groove

Claims (6)

It is connected to a main body member (10) having a connecting portion (11) that is inserted and bonded to a receiving port of a pipe joint and a union threaded portion (12) formed adjacent to one end of the connecting portion (11). A hose port (20) having a bamboo joint portion (22) inserted into the soft drain hose (4) to be used, a sealing member for sealing between the main body member (10) and the hose port (20), and a sealing member. A union nut (30) screwed into the union screw portion (12) for pressing and connecting the hose port (20) to the main body member (10) via the seal member is provided.
The main body member (10) and the hose port (20) are connected to the union nut (30) by being screwed into the union screw portion (12), except for the bamboo shoot joint portion (22). A drain hose connection adapter configured to form a heat insulating air layer (11a, 13a, 21Ca) on the outer peripheral portion. The hose mouth (20) has a base portion (21) formed on the main body member (10) side of the bamboo shoot joint portion (22).
The main body member (10) is formed on the inner peripheral side of the union screw portion (12) and is formed on a receiving portion (13) for receiving a part of the base portion (21) and a bottom portion of the receiving portion (13). It has a support surface (14) that supports the formed hose port (20), and has a support surface (14).
The base portion (21) at the hose port (20) forms a joint flange portion (21Aa) abutted against the support surface (14) via the seal member at an end portion, and forms a joint flange portion (21Aa) at the end portion of the receiving portion (13). A union that is engaged with the insertion portion (21A) to be inserted and the bag-shaped lid portion of the union nut (30) formed adjacent to the bamboo shoot joint portion (22) side of the insertion portion (21A). It has a flange portion (21B) and a connecting portion (21C) that connects the union flange portion (21B) and the bamboo shoot joint portion (22).
The connecting portion (11) and the connecting portion (21C) are formed on the outer peripheral wall of a double wall having an annular heat insulating air layer (11a, 21Ca), respectively.
The receiving portion (13) and the inserting portion (21A) are connected to the receiving portion (13) in a state where the main body member (10) and the hose port (20) are connected by fastening the union nut (30). The drain hose connection adapter according to claim 1, wherein an annular heat insulating air layer (13a) is formed between the inner peripheral surface of 13) and the outer peripheral surface of the insertion portion (21A). The drain hose connection adapter according to claim 2, wherein the seal member is an O-ring (40). The drain hose connection according to claim 2 or 3, wherein the main body member (10) has a partition flange portion (15) formed between the connection portion (11) and the union screw portion (12). Adapter for. The drain pump kit (3) connected to the tip of the drain pipe of the indoor unit (1) of the air conditioner, and
A flexible drain hose (4) for draining the drain contained in the drain accommodating portion of the drain pump kit (3) by the drain pump, and
An air conditioning system including a drain pipe having an elbow (6) as a pipe joint for connecting the soft drain hose (4).
The elbow (6) is arranged so that one socket (6Aa) opens upward.
The soft drain hose (4) is led out from the drain pump kit (3) in an inverted U shape so that the tip portion is bent downward and faces the socket (6Aa).
The flexible drain hose (4) and the socket (6Aa) of the elbow (6) are detachably connected via the drain hose connection adapter according to any one of claims 1 to 4. Air conditioning system. Loosen the union nut (30) and disconnect the soft drain hose (4) from the elbow (6).
The receiving port (6Aa) of the elbow (6) from which the soft drain hose (4) is separated is used as a maintenance opening for cleaning the drain pipe.
The fifth aspect of claim 5 is that after the maintenance is completed, the soft drain hose (4) is reconnected to the elbow (6) by screwing the union nut (30) into the union threaded portion (12). How to maintain the drain piping in the air conditioning system.

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