JP6486846B2 - Drain water drainage mechanism - Google Patents

Description

  The present invention relates to a drain water drainage mechanism for draining drain water generated in an indoor unit of an air conditioner to the outside of the indoor unit.

  Conventionally, indoor units installed on the back of a ceiling or the like are installed outdoors by piping or hoses that extend upward from the drain outlet of the indoor unit and extend horizontally so as to straddle the beams provided on the back of the ceiling. It is connected to a drain drain pipe that leads to Thereby, the drain water generated in the indoor unit is drained from the drain drain port to the drain drain pipe through the pipe and the hose.

  As an example of a drain water drainage mechanism that is a connection structure between such an indoor unit and a drain drain pipe, for example, Patent Document 1 discloses that a drain drain port and a drain drain pipe of an indoor unit are detachable via a joint portion. A connection structure for attaching a drain hose in a state is disclosed. An example of a connection structure between a drain outlet and a drain hose through a joint portion of this type of connection structure will be described with reference to FIG.

  A joint portion 110 for detachably attaching the drain drain port 100 and the drain hose 101 includes a hollow cylindrical first joint member 120 attached to the drain drain port 100 and a hollow cylindrical second joint member 130 attached to the drain hose 101. Are fixed by the locking tool 140. A passage through which drain water flows is formed in the first joint member 120 and the second joint member 130.

The first joint member 120 includes a joint insertion portion 122 into which the second joint member 130 is inserted, and a drain port insertion portion 121 into which the drain drain port 100 is inserted. As shown in FIG. 13, the inner diameter of the drain outlet insertion part 121 is formed larger than the inner diameter of the coupling insertion portion 122, step portion 123 is formed at the boundary portion between the drain outlet insertion part 121 and the joint port insertion portion 122 Yes. The drain drainage port 100 is in contact with the stepped portion 123 to determine the position of the drainage drainage port 100 with respect to the joint 110.

JP2015-105789A

  By the way, as shown in FIG. 13, the inner diameter of the drain outlet 100 constituting the passage through which drain water flows in the drain outlet 100 is the second joint member 130 constituting the passage through which drain water flows in the second joint member 130. It is larger than the inner diameter. As a result, since the lowermost part 100L of the passage of the drain outlet 100 is positioned below the lowermost part 131 of the passage of the second joint member 130, the gap between the passage of the drain outlet 100 and the passage of the second joint member 130 A step 150 is formed. As a result, as shown by a two-dot chain line in FIG. 13, the drain water flowing from the drain outlet 100 toward the drain hose is once blocked by the step portion 150, and only the drain water that has passed over the step portion 150 is the first drain water. It flows through the passage of the two joint members 130. Thus, the drain water may not flow smoothly from the drain outlet 100 to the drain hose 101.

  This invention is made | formed in view of such a situation, Comprising: It aims at providing the drain water drainage mechanism which can drain | drain drain water smoothly from a drain drain port to a drain drain pipe.

A drain water drain mechanism that solves this problem is a drain water drain mechanism in which a flexible drain hose is detachably attached to a drain drain port and a drain drain pipe of an indoor unit in an air conditioner via a joint. And the indoor unit side joint part which connects the said drain drain port and the said drain hose among the said joint parts is the 1st joint member attached to the said drain drain port, and the 2nd joint member attached to the said drain hose And the first joint member and the second joint member are detachably assembled in a removable manner, and the second joint member extends in a direction in which the first joint member extends. And a vertical pipe that rises from the horizontal pipe toward the drain hose, and the horizontal pipe includes a first pipe part into which the first joint member is inserted, the first pipe part, and the vertical pipe. Forming a connecting portion of Step forming a second tubular portion having a smaller diameter than the inner diameter of the first tubular portion, when the first joint member is assembled detachably with respect to the second joint member, the abutment surface of the first joint member And the step portion is provided at a boundary portion between the first tube portion and the second tube portion, and has a passage connecting the first tube portion and the second tube portion, The step portion passage is formed as a long hole whose longitudinal direction is the rising direction of the vertical pipe, and the lowermost portion of the long hole is at the same height or above the lowermost portion of the passage of the second pipe portion. located in and against the bottom end of the front Symbol inserted the drain discharge port to the first joint member positioned below.

According to this configuration, the stepped portion is located between the drain outlet and the second pipe portion so that the indoor unit side joint is located above the lowest part of the passage of the drain outlet inserted in the first joint member. Therefore, it is possible to provide a drainage drainage mechanism that is not formed in a simple manner or can be easily integrated or divided . Thereby, the drain water flowing through the lowermost part of the drain drainage passage inserted into the first joint member is not blocked when the drain water flows into the second pipe part, and by its own weight, the lowermost part of the passage of the second pipe part. Flow down. Thus, since drain water flows smoothly from a drain drainage port via a 1st joint member toward a 2nd joint member, drain water can be smoothly drained from a drain drainage port to a drain hose. Therefore, by using this joint portion, it is possible to facilitate the maintenance of installing any drain hose of the indoor unit, and it is possible to smoothly drain the drain water from the drain drain port to the drain drain pipe.

Further, since the passage of the step difference portion is formed by the elongated hole, the structure which is located the bottom of the passage of the step portion below the bottom of the drain water outlet it can be easily formed.

In the drain water drainage mechanism, it is preferable that the short diameter of the long hole is equal to a dimension in a width direction orthogonal to a direction in which the horizontal pipe extends and a vertical direction in the passage of the second pipe portion.
According to this configuration, since the passage of the stepped portion and the passage of the second pipe portion are smoothly continuous in the width direction, the drain water can be smoothly flowed from the stepped portion to the second pipe portion. The minor axis of the long hole is equal to the dimension in the width direction of the passage of the second pipe part when the minor axis of the long hole and the dimension of the second pipe part in the width direction are slightly different due to manufacturing errors. Including.

  Further, in the drain water drainage mechanism, a lower part of the passage of the second pipe part is formed in an arc shape, and a lower part of the long hole is an inner diameter of a lower part of the passage of the second pipe part. It is preferable that it is formed in an arc shape equal to.

  According to this configuration, the portion below the passage of the step portion and the portion below the passage of the second pipe portion are smoothly continuous, so that drain water can flow smoothly from the step portion to the second pipe portion. . Note that the arc shape equal to the inner diameter of the passage of the second pipe portion in the long hole includes an arc shape slightly different from the inner diameter of the passage of the second pipe line due to manufacturing errors.

  In the drain water drainage mechanism, the lowermost portion of the stepped portion passage is the same position as the lowermost portion of the passage at the open end portion on the second joint member side of the first joint member, or the first joint member. It is preferable that it is located below the lowest part of the channel | path of the opening edge part by the side of the said 2nd coupling member.

  According to this structure, the level | step difference part which dams drain water in the lowest part of the connection part of a 1st coupling member and a 2nd coupling member is not formed. Accordingly, the drain water smoothly flows through the lowermost part of the connection portion between the first joint member and the second joint member. Therefore, drain water can be smoothly flowed from the first joint member to the second joint member.

  According to the drain water drainage mechanism, drain water can be smoothly drained from the drain drain port to the drain drain pipe.

(A) Side view of one embodiment of drain water drainage mechanism connected to drain drain port and drain drain pipe of indoor unit of air conditioner, (b) Indoor unit, drain drain pipe and drain water of (a) above. The top view with a drainage mechanism. The disassembled perspective view of the drain water drainage mechanism of FIG. The drain water drainage mechanism of FIG. 2 WHEREIN: The disassembled perspective view of the drain drain port of the state which decomposed | disassembled the indoor unit side joint part, the indoor unit side joint part, and the drain drain pipe. (A) The front view of the 1st joint member in the indoor unit side joint part of FIG. 3, (b) Sectional drawing of the 1st joint member cut | disconnected by the 4b-4b line | wire of the said (a). (A) The front view of the 2nd joint member in the indoor unit side joint part of FIG. 3, (b) The top view of a 2nd joint member, (c) The 2nd joint member cut | disconnected by the 5c-5c line of said (b) FIG. (A) Sectional drawing of indoor unit side joint part, (b) Front view of indoor unit side joint part. Sectional drawing of the state in which the drain outlet and the drain hose were connected to the indoor unit side joint part. Sectional drawing of the state in which the drain outlet and the drain hose were connected to the indoor unit side joint part in the drain water drainage mechanism of a comparative example. The side view of the state in which the drain outlet and the drain hose were assembled | attached to the indoor unit side coupling part. In the drain water drainage mechanism of a modification, (a) The front view of a 1st joint member, (b) Sectional drawing of the 1st joint member cut | disconnected by the 10b-10b line of said (a). In the drain water drainage mechanism of another modification, the exploded perspective view of the drain pipe side joint part to which the drain hose was connected, and the drain drain pipe. The side view of the indoor unit side joint part in the drain water drainage mechanism of another modification. Sectional drawing of the state in which the drain drain port and the drain hose were connected to the joint part in the conventional drain water drainage mechanism.

  Hereinafter, an embodiment of a drain water drainage mechanism will be described with reference to the drawings. The drain water drainage mechanism 1 of this embodiment is configured to drain water drained from a drain drain port 2 of an indoor unit IU of an air conditioner installed at a high place such as a ceiling-embedded type or a ceiling-suspended type. Drain into. In the following description, the direction in which drain water flows from the drain drain port 2 toward the drain drain pipe 3 may be referred to as a “water flow direction W”. Moreover, when showing a direction in description of the drain water drainage mechanism 1 below, each direction when the indoor unit IU and the drain drain pipe 3 are connected by the drain water drainage mechanism 1 as shown in FIG. 1 is used.

  As shown to Fig.1 (a), the drain water drainage mechanism 1 is provided with the drain hose 4 which has flexibility. The drain hose 4 is supported by a hose support 5 suspended from the ceiling slab C so that a part of the drain hose 4 is positioned above the drain drain port 2 by a predetermined height. An end of the drain hose 4 on the drain drain port 2 side is connected to the drain drain port 2 via the indoor unit side joint 10, and an end of the drain hose 4 on the drain drain pipe 3 side is a drain pipe side joint. The drain drain pipe 3 is connected via 6.

  As shown in FIG. 1 (b), the drain outlet 2 is a chamfer of one of the chamfered portions formed at the four corners of a box-shaped housing H that houses a heat exchanger (not shown) in the indoor unit IU. Connected to the part. And the drain water drainage mechanism 1 connected to the drain drain port 2 is extended toward the horizontal direction X of the indoor unit IU.

  As shown in FIG. 2, the drain water draining mechanism 1 includes a drain drain port 2 extending in the lateral direction X and a drain hose 4 extending in the vertical direction Y by an L-shaped (so-called elbow type) indoor unit side joint portion 10. Is connected to the drain discharge port 2 side. Further, the drain water drainage mechanism 1 includes a drain drain pipe 3 extending in the horizontal direction X and a drain drain pipe 3 side of the drain hose 4 extending in the vertical direction Y by an L-shaped (so-called elbow type) drain pipe side joint portion 6. Is connected to the part. Thus, in this embodiment, the indoor unit side joint part 10 and the drain pipe side joint part 6 are the same structures.

  As shown in FIGS. 2 and 3, the indoor unit side joint portion 10 is detachably assembled with a first joint member 20 attached to the drain outlet 2 and a second joint member 30 attached to the drain hose 4. ing.

  As shown in FIG. 3, the first joint member 20 includes a flow path pipe part 21 extending in the lateral direction X, an extension pipe part 22 extending from the flow path pipe part 21 toward the second joint member 30, and an extension pipe. A mounting portion 23 provided on the outer peripheral portion of the portion 22 and a flange 24 provided on the drain discharge port 2 side in the flow channel tube portion 21 are integrally formed. For example, the first joint member 20 is formed by injection molding using a resin material.

  The second joint member 30 is provided on the side of the horizontal pipe 31 extending in the horizontal direction X (the direction in which the first joint member 20 extends), the vertical pipe 32 rising from the horizontal pipe 31, and the upper opening end side of the vertical pipe 32. The hose connection portion 33 to which the drain hose 4 is connected and the pair of locking portions 34X extending from the horizontal tube 31 toward the drain drain port 2 are integrally formed. For example, the second joint member 30 is formed by injection molding using a resin material.

Detailed configurations of the first joint member 20 and the second joint member 30 will be described with reference to FIGS. 4 and 5.
As shown in FIG. 4B, the first joint member 20 is formed with a through hole penetrating in the lateral direction X. The through hole includes a passage through which drain water flows. The flow path pipe portion 21 has a first insertion portion 21a having a first inner diameter D1 into which the drain drain port 2 (see FIG. 3) can be inserted, and a second inner diameter D2 smaller than the first inner diameter D1, and drain drainage. It has the 2nd insertion part 21b in which the opening | mouth 2 can be inserted. The 1st insertion part 21a forms the opening edge part by the side of the drain drain port 2, and the 2nd insertion part 21b is provided in the downstream of the water distribution direction W with respect to the 1st insertion part 21a.

  A first positioning portion 21c having a step shape that is reduced in diameter toward the downstream side in the water flow direction W is formed at a boundary portion between the passage of the first insertion portion 21a and the passage of the second insertion portion 21b. When a drain drain port (not shown) having an outer diameter equal to the first inner diameter D1 is inserted into the flow path tube portion 21, the drain drain port comes into contact with the first positioning portion 21c. The position of the drain outlet is determined.

  A second positioning portion 21d having a step shape that is reduced in diameter toward the downstream side in the water flow direction W is formed in the downstream side of the water flow direction W in the passage of the second insertion portion 21b. When a drain drain port having an outer diameter equal to the second inner diameter D2 (drain drain port 2 of the present embodiment) is inserted into the flow path pipe portion 21, the drain drain port 2 comes into contact with the second positioning portion 21d. The position of the drain outlet 2 with respect to the flow path pipe portion 21 is determined. Thus, the drain joint which has two different types of outer diameter can be attached to the 1st joint member 20 (flow-path pipe part 21).

  In the second insertion portion 21b, an end portion 21e having an annular shape when viewed in the lateral direction X is formed at an end portion on the downstream side in the water flow direction W with respect to the second positioning portion 21d. The inner diameter of the stepped portion 21e is equal to the inner diameter of the passage through which drain water flows in the drain drain port 2 having an outer diameter equal to the second inner diameter D2.

  An extension pipe part 22 extended from the second insertion part 21b is provided on the downstream side in the water flow direction W from the step part 21e. The extension pipe portion 22 includes a first enlarged diameter portion 22a having an inner diameter substantially equal to the second inner diameter D2, and a second enlarged diameter portion 22b having an inner diameter substantially equal to the first inner diameter D1. The 2nd enlarged diameter part 22b is provided in the downstream of the water distribution direction W with respect to the 1st enlarged diameter part 22a. For this reason, in the boundary part of the channel | path which the drain water distribute | circulates in the step part 21e, and the channel | path which the drain water distribute | circulates in the 1st enlarged diameter part 22a, and the path | route of the 1st enlarged diameter part 22a, and the 2nd enlarged diameter part 22b A step shape that expands toward the downstream side in the water flow direction W is formed at each boundary portion with the passage through which the drain water flows.

  The attachment portion 23 provided on the outer peripheral portion of the extension tube portion 22 is composed of a pair of annular wall portions formed at intervals in the lateral direction X. An O-ring 11 that is an example of an annular seal member is attached between the pair of annular wall portions.

  Further, a flange 24 is provided on the outer peripheral portion of the flow path pipe portion 21. The flange 24 is provided at the end of the first insertion portion 21a on the second insertion portion 21b side. In addition, the outer diameter of the 1st insertion part 21a is larger than the outer diameter of the 2nd insertion part 21b. For this reason, the outer peripheral part of the flow-path pipe part 21 becomes a step shape in the boundary part of the 1st insertion part 21a and the 2nd insertion part 21b.

  As shown in FIG. 4A, the flange 24 has an annular shape when viewed from the lateral direction X. The flange 24 is formed with a pair of locking holes 24X extending in the circumferential direction. The pair of locking holes 24X oppose each other in the vertical direction Y. An outer peripheral wall 25 having an annular shape when viewed from the lateral direction X is provided on the outer peripheral portion of the flange 24. As shown in FIG. 4B, the outer peripheral wall 25 rises from the flange 24 toward the upstream side in the water flow direction W. A locking surface 24 a is provided between the pair of locking holes 24 </ b> X and the outer peripheral wall 25 in the radial direction of the flange 24.

  As shown in FIG. 5C, the second joint member 30 is formed with a through hole penetrating the horizontal pipe 31 and the vertical pipe 32. This through hole becomes a passage through which drain water flows. The horizontal pipe 31 of the second joint member 30 connects the first pipe part 31a constituting the upstream end of the second joint member 30 in the water flow direction W, the first pipe part 31a, and the vertical pipe 32. And a second pipe portion 31b. The first joint member 20 (see FIG. 4) is inserted into the first pipe portion 31a. The cross-sectional area of the passage of the second pipe portion 31b is smaller than the cross-sectional area of the passage of the first pipe portion 31a. For this reason, the level | step-difference part 31c which connects the 1st pipe part 31a and the 2nd pipe part 31b is formed in the boundary part of the path | route of the 1st pipe part 31a and the path | route of the 2nd pipe part 31b.

  As shown in FIG. 5A, the stepped portion 31c is formed with a long hole 31d that is biased downward from the center of the first tube portion 31a and whose vertical direction Y is the longitudinal direction. The long hole 31d constitutes a passage of the step portion 31c. In the front view of the second joint member 30, the long hole 31 d has a shape composed of an arc portion formed at the upper end portion and the lower end portion thereof and a pair of linear portions connecting these arc portions along the vertical direction Y. is there.

  The radius of the upper and lower arc portions in the long hole 31d is equal to the radius of the passage of the step portion 21e (see FIG. 4). Moreover, the long hole 31d is equal to the passage shape of the end portion on the long hole 31d side in the second pipe portion 31b, and is smoothly continuous with the passage of the second pipe portion 31b. That is, the passage at the end on the long hole 31d side in the second pipe portion 31b is formed as a long hole whose vertical direction Y is the longitudinal direction. For this reason, the short diameter SD of the long hole 31d is a dimension in the width direction perpendicular to the horizontal direction X (the direction in which the horizontal pipe 31 extends) and the vertical direction Y in the passage of the second pipe portion 31b (the second pipe portion 31b Equal to the minor axis of the passage). The arc shape of the lower part of the long hole 31d is equal to the arc shape of the lower part of the passage of the second pipe portion 31b. Further, as shown in FIG. 5C, the position in the vertical direction Y of the lowermost portion 31L of the passage of the stepped portion 31c is equal to the position of the lowermost portion Y of the passage of the second pipe portion 31b in the vertical direction Y. For this reason, the lowermost part 31L may refer to the lowermost part of the step part 31c and the lowermost part of the second pipe part 31b in common.

As shown in FIGS. 5B and 5C, a pair of locking portions 34 </ b> X extending upstream in the water flow direction W is provided at the opening end of the horizontal pipe 31 on the upstream side in the water flow direction W. ing.
The pair of locking portions 34X oppose each other in the rising direction of the vertical tube 32 (the vertical direction Y in the present embodiment). Moreover, a pair of latching | locking part 34X is extended toward the upstream (drain drain port 2 side) of the water distribution direction W from the opening edge part of the 1st pipe part 31a. Specifically, the pair of locking portions 34 </ b> X are inclined and extended in directions away from each other toward the upstream side (the drain drainage port 2 side) in the water flow direction W. The locking portion 34X includes an arm 34a extending from the opening end of the first tube portion 31a, and a locking claw 34b formed at the distal end portion of the arm 34a. The locking claw 34b is formed so as to protrude to the outside of the arm 34a in the vertical direction Y.

  The vertical pipe 32 is cylindrical and extends upward from the second pipe portion 31b. The radius of the passage of the vertical pipe 32 is substantially equal to the radius of the step portion 21e (see FIG. 4) of the first joint member 20. A hose connection portion 33 is provided at the upper end portion of the vertical tube 32. The hose connection portion 33 is formed concentrically with the vertical tube 32 at the outer peripheral portion of the vertical tube 32. The hose connection portion 33 is provided with an annular storage portion 33a into which the end of the drain hose 4 can be inserted. A part of the hose connection portion 33 is connected to the upper end portion of the first tube portion 31 a of the horizontal tube 31.

As shown in FIG. 6A, the indoor unit side joint portion 10 having such a configuration is provided with a pair of insertion / extraction portions 40 for making the first joint member 20 and the second joint member 30 detachable. It has been.
The pair of insertion / extraction portions 40 includes a pair of locking holes 24 </ b> X provided in the flange 24 of the first joint member 20 and a pair of locking portions 34 </ b> X provided in the horizontal pipe 31 of the second joint member 30. Each of the pair of insertion / extraction portions 40 is provided with a locking mechanism 41 for locking the first joint member 20 and the second joint member 30. The locking mechanism 41 includes a locking surface 24a that forms the outer peripheral edge of the locking hole 24X, and a locking claw 34b of the locking portion 34X. In the pair of insertion / extraction portions 40, the locking portion 34 </ b> X is inserted into the locking hole 24 </ b> X, and the locking claw 34 b is locked to the locking surface 24 a that forms the outer peripheral edge of the locking hole 24 </ b> X. And the second joint member 30 are locked. On the other hand, the pair of insertion / extraction portions 40 (locking mechanism 41) is configured so that the locking claw 34b of the locking portion 34X is unlocked from the locking surface 24a that forms the outer peripheral edge of the locking hole 24X. The member 20 and the second joint member 30 are removed from each other.

  As shown in FIG. 6B, in the circumferential direction of the indoor unit side joint portion 10, that is, in the circumferential direction of the flange 24, the length of the locking hole 24X is longer than the length of the locking portion 34X. In the present embodiment, in the circumferential direction of the flange 24, the length of the locking hole 24X is twice or more the length of the locking portion 34X. The pair of locking holes 24 </ b> X are arranged in the circumferential direction within a range in which the flange 24 can maintain necessary strength against repeated attachment / detachment of the first joint member 20 and the second joint member 30 by the pair of insertion / extraction portions 40. The length of the. In this embodiment, since the outer peripheral wall 25 is provided in the flange 24, the circumferential length of the pair of locking holes 24X is longer than that in the case where the outer peripheral wall 25 is not provided in the flange 24. .

  As shown in FIG. 6A, in the state where the pair of locking portions 34X and the locking surfaces 24a forming the outer peripheral edges of the pair of locking holes 24X are locked, the flow path tube portion of the first joint member 20 21 is inserted into the first pipe portion 31 a of the second joint member 30, and the opening end portion on the downstream side in the water flow direction W of the first joint member 20 (open end portion of the extension pipe portion 22) is the second joint member. It is in contact with 30 step portions 31c.

  Between the 1st joint member 20 and the 2nd joint member 30, when the O-ring 11 carries out a compression deformation (elastic deformation), the outer peripheral part of the 1st joint member 20 and the inner peripheral part of the 2nd joint member 30, Filling the gap between. Accordingly, the drain water is prevented from leaking from between the first joint member 20 and the second joint member 30.

  As shown in FIG. 7, the drain outlet 2 is bonded to the second insertion portion 21 b of the first joint member 20. Specifically, in a state where the adhesive is applied to the inner surface of the second insertion portion 21b, the drain drain port 2 is inserted into the second insertion portion 21b until it contacts the second positioning portion 21d. At this time, an annular recess is formed between the drain drain port 2, the second positioning portion 21d, and the step portion 21e in the lateral direction X, and the drain drain port 2 is formed in the second insert portion 21b in the recess. The adhesive (shaded portion in FIG. 7) that has been pushed out by being inserted into the reservoir accumulates.

  The lowermost part of the passage inserted into the second insertion portion 21b of the drain outlet 2 (hereinafter referred to as “lowermost 2L”) is vertically aligned with the lowermost portion of the passage of the step portion 21e in the first joint member 20. They are equal in Y and are located above the lowermost part 22L of the passage of the extension pipe part 22. The lowermost part 22L of the passage of the extension pipe part 22 is positioned so as to be directed downward from the first enlarged diameter part 22a toward the second enlarged diameter part 22b, that is, toward the downstream side in the water flow direction W. The lowermost portion 22L of the second enlarged diameter portion 22b is positioned slightly above the lowermost portion 31L of the passage of the step portion 31c of the second joint member 30 in the vertical direction Y. That is, the lowermost portion 31L of the passage of the stepped portion 31c is positioned below the lowermost portion of the passage at the opening end portion of the first joint member 20 on the second joint member 30 side.

  Next, the effect | action of this embodiment is demonstrated using FIG.7 and FIG.8. The indoor unit side joint portion 10 </ b> A of the comparative example shown in FIG. 8 differs from the indoor unit side joint portion 10 in the shape of the horizontal pipe 31 of the second joint member 30. For this reason, in the indoor unit side joint part 10A, the same components as the indoor unit side joint part 10 are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 7, the drain water flowing through the drain discharge port 2 does not fill the entire passage through which the drain water flows in the indoor unit side joint portion 10, for example, below the passage of the first joint member 20. Or a spiral shape along the inner surface of the passage of the first joint member 20.

  As shown by a two-dot chain line in FIG. 7, the drain water flowing through the drain outlet 2 passes through the passage of the step portion 21 e and then flows down to the lowermost portion 22 </ b> L of the passage of the extension pipe portion 22 due to its own weight. Then, it passes through the lowermost part 31L of the passage of the step part 31c and the second pipe part 31b, and is drained to the drain hose 4 through the vertical pipe 32. As described above, the drain water from the drain outlet 2 is drained to the drain hose 4 without being blocked in the passages of the horizontal pipes 31 of the first joint member 20 and the second joint member 30.

  By the way, as shown in FIG. 8, the second joint member 30 of the indoor unit side joint portion 10A has a position in the vertical direction Y of the lowermost portion 31L of the passage of the second pipe portion 31b that is the lowermost portion of the passage of the drain drainage port 2. It is the structure which becomes equal to the position of the up-down direction Y of 2L. Therefore, a recess is formed between the passage of the extension pipe portion 22 of the first joint member 20 and the passage of the step portion 31c. Thereby, the drain water of the drain outlet 2 flows down into the recess. That is, drain water (shaded portion in FIG. 8) accumulates in the recess. The drain water accumulated in the recess is prevented from leaking from between the first joint member 20 and the second joint member 30 by the O-ring 11. By the way, when indoor unit IU (refer FIG. 1) is installed in the room which uses oil like a restaurant, for example, oil will be contained in drain water. Since the drain water stored in the recess also contains oil, the O-ring 11 is melted by the oil and there is a risk that the drain water leaks between the first joint member 20 and the second joint member 30.

  In that respect, as shown in FIG. 7, the indoor unit side joint portion 10 of the present embodiment has the lowermost portion 31L of the passage of the step portion 31c at the same position as the lowermost portion 22L of the passage of the extension pipe portion 22, that is, FIG. Since the concave portion for collecting drain water such as the shaded portion 8 is not formed, the drain water does not accumulate between the first joint member 20 and the second joint member 30. Therefore, the deterioration of the O-ring 11 can be suppressed, and the drain water can be prevented from leaking from between the first joint member 20 and the second joint member 30.

  Next, the assembly work of the first joint member 20 and the second joint member 30, and the connection work and the separation work of the drain drain port 2 and the drain hose 4 will be described with reference to FIGS. 2, 3, 6 and 9. I will explain.

  As shown in FIGS. 3 and 6, when the operator assembles the first joint member 20 and the second joint member 30, the flow path pipe portion of the first joint member 20 is attached to the first pipe portion 31 a of the second joint member 30. The 2nd insertion part 21b in 21 and the extension pipe part 22 are inserted. At this time, before the locking of the locking claw 34b of the locking portion 34X and the locking surface 24a forming the outer peripheral edge of the locking hole 24X is started, the O attached to the mounting portion 23 of the extension pipe portion 22 is started. The ring 11 is inserted into the first pipe portion 31a while being compressed. Thereby, the inclination of the first joint member 20 with respect to the second joint member 30 is suppressed. For this reason, when the 1st coupling member 20 is inserted without twisting with respect to the 2nd coupling member 30, it becomes easy to locate the latching | locking part 34X in the latching hole 24X. Further, when the first joint member 20 is further inserted into the second joint member 30, the locking claw 34 b in the locking portion 34 </ b> X is pushed by the inner surface of the locking hole 24 </ b> X, and the outer circumferential surface of the flow path tube portion 21. The locking portion 34X is elastically deformed toward the surface. Thereby, the locking claw 34b of the locking part 34X can be easily inserted into the locking hole 24X.

  And when the opening end part of the extension pipe part 22 of the 1st joint member 20 contacts the level | step-difference part 31c of the 2nd joint member 30, the latching claw 34b of the latching | locking part 34X is a water flow direction rather than the latching hole 24X. It is located on the upstream side of W (the drain outlet 2 side). At this time, the locking portion 34X is restored toward the outer peripheral wall 25 of the first joint member 20 by a restoring force. Thereby, the latching mechanism 41 will be in a latching state as shown in FIG.

  As shown in FIG. 3, in the connection work between the drain drain port 2 and the drain hose 4, the operator adheres the drain drain port 2 to the indoor unit side joint portion 10. On the other hand, the operator fixes the drain hose 4 to the indoor unit side joint 10. Specifically, the operator fits one open end portion of the drain hose 4 into the housing portion 33a of the hose connection portion 33 of the second joint member 30 of the indoor unit side joint portion 10. In this embodiment, after the first joint member 20 and the second joint member 30 are assembled, the drain drain port 2 and the drain hose 4 are attached. However, the drain drain port 2 is attached to the first joint member 20, and the first After attaching the drain hose 4 to the two joint members 30, the first joint member 20 and the second joint member 30 may be assembled.

  In addition, in the connection work between the drain drain pipe 3 and the drain hose 4, the operator performs the drain pipe side in the same manner as the assembly work of the first joint member 20 and the second joint member 30 in the indoor unit side joint portion 10 described above. The first joint member 20 and the second joint member 30 (both see FIG. 2) of the joint portion 6 are assembled. Then, the operator similarly adheres the drain drain pipe 3 to the drain pipe side joint portion 6. Through the above operation, the drain water drainage mechanism 1 is assembled so that drain water flows from the drain drain port 2 to the drain drain pipe 3.

  On the other hand, when the worker separates the drain drain port 2 and the drain hose 4 due to maintenance of the drain water draining mechanism 1 or the like, as shown by the thick arrow in FIG. 34X is elastically deformed toward the outer peripheral surface of the flow path tube portion 21. As a result, the engagement between the engagement claw 34b of the engagement portion 34X and the engagement surface 24a that forms the outer peripheral edge of the engagement hole 24X is released. Here, since the pair of locking portions 34X are arranged to face each other in the direction in which the vertical pipe 32 of the second joint member 30 rises, the operator's finger pressing the pair of locking portions 34X (two-dot chain line in FIG. 9) ) May be arranged in the direction in which the vertical tube 32 rises.

  Then, as indicated by a white arrow in FIG. 9, the operator moves the second joint member 30 in the lateral direction X away from the first joint member 20. Thereby, the 1st joint member 20 and the 2nd joint member 30 are separated. At this time, the first joint member 20 remains adhered to the drain drain port 2, and the second joint member 30 remains connected to the drain hose 4. Thus, when the operator separates the first joint member 20 and the second joint member 30 of the indoor unit side joint portion 10, the drain outlet 2 and the drain hose 4 are separated. In addition, when an operator isolate | separates the 1st coupling member 20 and the 2nd coupling member 30 (both refer FIG. 2) of the drain pipe side coupling part 6, drain drain pipe 3 (refer FIG. 2), drain hose 4 and Are separated. As described above, in the drain water drainage mechanism 1, the drain hose 4 is detachably attached to the drain drain port 2 and the drain drain pipe 3 by attaching and detaching the first joint member 20 and the second joint member 30.

According to the present embodiment, the following effects can be obtained.
(1) The lowermost portion 31L of the passage of the second pipe portion 31b of the second joint member 30 (the lowermost portion 31L of the passage of the step portion 31c) is positioned below the lowermost portion 2L of the passage of the drain outlet 2. No step portion is formed between the drain drain port 2 and the second pipe portion 31b so as to be higher than the lowermost part 2L of the passage of the drain drain port 2 inserted into the first joint member 20. As a result, the drain water flowing in the lowermost part 2L of the passage of the drain outlet 2 flows down to the lowermost part 31L of the passage of the second pipe part 31b without being blocked when flowing into the second pipe part 31b. As described above, since the drain water smoothly flows from the drain drain port 2 through the first joint member 20 toward the second joint member 30, the drain water can be smoothly drained from the drain drain port 2 to the drain hose 4. it can. Therefore, drain water can be smoothly drained from the drain drain port 2 to the drain drain pipe 3.

  (2) Since the passage of the stepped portion 31c is formed by the long hole 31d whose vertical direction Y is the longitudinal direction, the lowermost portion 31L of the passage of the stepped portion 31c is positioned below the lowermost portion 2L of the drain discharge port 2. The configuration can be easily formed.

  (3) Since the short diameter SD of the long hole 31d constituting the passage of the step portion 31c is equal to the dimension in the width direction orthogonal to the lateral direction X and the vertical direction Y in the passage of the second pipe portion 31b, the long hole 31d The straight part and the passage of the second pipe part 31b are flush with each other. Thereby, since the passage of the step portion 31c and the passage of the second pipe portion 31b are smoothly continued, drain water can be smoothly flowed from the step portion 31c to the second pipe portion 31b.

  (4) The lower part of the path of the step part 31c is configured so that the arcuate lower part of the long hole 31d constituting the path of the step part 31c is equal to the arcuate lower part of the path of the second pipe part 31b. And the lower portion of the passage of the second pipe portion 31b are flush with each other. Thereby, since the lower part of the passage of the step part 31c and the lower part of the passage of the second pipe part 31b are smoothly continued, the drain water can be smoothly flowed from the step part 31c to the second pipe part 31b. it can.

  (5) Since the position of the lowermost part 31L of the passage of the step part 31c and the position of the lowermost part 31L of the passage of the second pipe part 31b are equal to each other, the lowermost part 31L of the passage of the step part 31c and the second pipe part 31b The lowermost portion 31L of the passage is flush with the lowermost passage 31L. Thereby, since the lowest part 31L of the channel | path of the level | step-difference part 31c and the lowest part 31L of the channel | path of the 2nd pipe part 31b continue smoothly, drain water can be smoothly flowed from the level | step-difference part 31c to the 2nd pipe part 31b. it can.

  (6) The lowermost portion 31L of the passage of the step portion 31c is positioned below the lowermost portion 22L of the passage of the extension pipe portion 22 of the first joint member 20, whereby the first joint member 20 and the second joint member 30 It is avoided that a stepped portion that dams drain water is formed at the lowermost part of the connecting portion. Therefore, the drain water smoothly flows through the lowermost part of the connection portion between the first joint member 20 and the second joint member 30. Therefore, drain water can be smoothly flowed from the first joint member 20 to the second joint member 30.

  (7) The extension pipe part 22 is provided in the flow path pipe part 21 of the first joint member 20, and the O-ring 11 is attached to the extension pipe part 22 so that the O-ring 11 is locked by the locking mechanism 41. Before, it is inserted into the 1st pipe part 31a of the 2nd joint member 30 in a compression state. Thereby, since the 1st joint member 20 and the 2nd joint member 30 are suppressed from inclining mutually, the latching by the latching mechanism 41 can be performed smoothly. Therefore, the first joint member 20 and the second joint member 30 can be easily assembled.

  On the other hand, it is preferable that the O-ring 11 has a large outer diameter by improving the sealing performance as the contact area increases. Moreover, it is preferable that the thickness of the flow path pipe part 21 and the extension pipe part 22 is substantially equal from the viewpoint of the moldability of the resin molding of the first joint member 20. Based on such an idea, the extension pipe portion 22 is provided with a first enlarged diameter portion 22a and a second enlarged diameter portion 22b which are larger than the inner diameter of the passage of the stepped portion 21e.

  And since the lowest part 31L of the channel | path of the level | step-difference part 31c becomes below the lowest part 22L of the channel | path of the extension pipe part 22, drain water flows smoothly from the 1st joint member 20 to the 2nd joint member 30. Accordingly, the first joint member and the second joint member 30 can be easily assembled and separated, and the moldability of the first joint member 20 and the sealing performance by the O-ring 11 are sufficiently secured, while the drain outlet 2 The drain water can be smoothly drained to the drain drain pipe 3.

(Modification)
The description regarding the said embodiment is an illustration of the form which the drain water drainage mechanism according to this invention can take, and is not intending restrict | limiting the form. The drain water drainage mechanism according to the present invention can take a form in which, for example, a modification of the embodiment shown below and at least two modifications not inconsistent with each other are combined.

  -As shown to Fig.10 (a), the length of the up-down direction Y of the long hole 31d formed in the level | step-difference part 31c of the 2nd joint member 30 is the long hole 31d of the said embodiment (refer Fig.5 (a)). It may be longer than the length in the vertical direction Y. As shown in FIG. 10B, the upper end portion of the step portion 31c only needs to be within a range where the extension pipe portion 22 of the first joint member 20 can contact.

-Instead of the long hole 31d shown to Fig.10 (a), the circular hole which makes the length of the up-down direction Y of the long hole 31d of Fig.10 (a) a diameter may be sufficient.
The lowermost part 31L of the passage of the step part 31c may be positioned above the lowermost part 31L of the passage of the second pipe part 31b and lower than the lowermost part 2L of the drain drain port 2.

  In the vertical direction Y, the position of the lowermost portion 22L of the passage of the extension pipe portion 22 of the first joint member 20 and the position of the lowermost portion 31L of the passage of the step portion 31c may be the same. Thereby, since the lowest part 22L of the channel | path of the extension pipe part 22 and the lowest part 31L of the channel | path of the level | step-difference part 31c become flush | planar, drain water flows smoothly from the extension pipe part 22 to the level | step-difference part 31c. Therefore, the drain water from the drain drain port 2 can be smoothly drained to the drain hose 4.

  -It replaces with a pair of insertion / extraction part 40, and after connecting the 1st joint member 20 and the 2nd joint member 30, the 1st joint member 20 and the 2nd joint member 30 are 1st by the locking tool provided separately. The structure which latches the joint member 20 and the 2nd joint member 30 may be sufficient.

  In the locking mechanism 41 of the pair of insertion / extraction portions 40, a pair of locking portions 34X may be provided on the first joint member 20 side, and a pair of locking holes 24X may be provided on the second joint member 30 side. In this case, a pair of latching | locking part 34X is extended toward the downstream of the water distribution direction W from the outer peripheral part of the 1st insertion part 21a, for example. The second joint member 30 is provided with a flange 24, and the flange 24 is provided with a pair of locking holes 24X.

A plurality of O-rings 11 may be attached to the outer peripheral portion of the extension pipe portion 22. In this case, the number of annular wall portions of the attachment portion 23 is set according to the number of O-rings 11.
The extension pipe part 22 may be omitted from the flow path pipe part 21 of the first joint member 20. In this case, the attachment portion 23 for attaching the O-ring 11 is provided at the downstream end portion in the water flow direction W in the second insertion portion 21b.

  The drain pipe side joint portion 6 may be configured differently from the indoor unit side joint portion 10. As an example, as shown in FIG. 11, the drain pipe side joint portion 6 has a vertical joint 32 omitted from the second joint member 30, and a second joint member 50 provided with a hose connection portion 33 on the horizontal pipe 31 is the first joint member 50. It is the structure attached to the 1 joint member 20 detachably. For this reason, in the drain pipe side joint portion 6 of FIG. 11, the second joint member 50 is connected to the drain hose 4, while the first joint member 20 is connected to the drain drain pipe 7. The drain drain pipe 7 is a T-shaped pipe (so-called cheese) and can be connected to drain drain pipes (both not shown) connected to a plurality of indoor units.

  The length dimension of the vertical pipe 32 in the vertical direction Y can be arbitrarily set. For example, as shown in FIG. 12, the vertical dimension Y of the vertical tube 32 is longer than the vertical dimension Y of the vertical tube 32 of the above embodiment. At this time, the hose connection portion 33 is positioned above the first tube portion 31a of the horizontal tube 31 with a space therebetween.

  -The drain water drainage mechanism is not limited to the application to the indoor unit IU of an air conditioner installed at a high place, and may be applied to an indoor unit of a floor type air conditioner.

DESCRIPTION OF SYMBOLS 1 ... Drain water drainage mechanism 2 ... Drain drainage port 2L ... Lowermost part 3 ... Drain drainage pipe 4 ... Drain hose 6 ... Drainage pipe side joint part (joint part)
7 ... Drain drainage pipe 10 ... Indoor unit side joint (joint)
20 ... 1st joint member 22 ... Extension pipe part (opening edge part)
22L ... Lowermost part 30 ... Second joint member 31 ... Horizontal pipe 31a ... First pipe part 31b ... Second pipe part 31c ... Step part 31d ... Long hole 31L ... Lowermost part 32 ... Vertical pipe IU ... Indoor unit SD ... Long hole Minor axis X: lateral direction (direction in which the first joint member extends, direction in which the horizontal pipe extends)
Y ... Up and down direction

Claims (4)

A flexible drain hose (4) is detachably attached to a drain drain port (2) and a drain drain pipe (3) of an indoor unit (IU) in an air conditioner via joint portions (6, 10). Drain water drainage mechanism (1),
The indoor unit side joint part (10) for connecting the drain drain port (2) and the drain hose (4) of the joint parts (6, 10) is attached to the drain drain port (2). It has 1 joint member (20) and the 2nd joint member (30) attached to the said drain hose (4), and said 1st joint member (20) and said 2nd joint member (30) are insertion-extraction type And detachably assembled,
The second joint member (30) includes a horizontal pipe (31) extending in a direction in which the first joint member (20) extends, and a vertical pipe rising from the horizontal pipe (31) toward the drain hose (4) ( 32)
The horizontal pipe (31) forms a first pipe part (31a) into which the first joint member (20) is inserted, and a connecting part between the first pipe part (31a) and the vertical pipe (32). The second pipe part (31b ) whose inner diameter is smaller than the inner diameter of the first pipe part (31a) and the first joint member (20) are detachably assembled to the second joint member (30). And a step portion (31c) that forms a contact surface of the first joint member (20) ,
The step portion (31c) is provided at a boundary portion between the first tube portion (31a) and the second tube portion (31b), and the first tube portion (31a) and the second tube portion (31b). )
The passage of the stepped portion (31c) is formed in a long hole (31d) whose longitudinal direction is the rising direction of the vertical pipe (32),
The bottom of the slot (31d) (31L) is located at the same height or upwardly relative to the bottom (31L) of the passage of the second pipe portion (31b), before Symbol first joint member (20 drain water drainage mechanism is for the bottom (2L) of the end portion of the inserted the drain water outlet (2)), characterized in that located below. The short diameter (SD) of the long hole (31d) is a width direction orthogonal to the direction (X) in which the horizontal pipe (31) extends and the vertical direction (Y) in the passage of the second pipe portion (31b). It is equal to a size. The drain water drainage mechanism according to claim 1 characterized by things. The lower part of the passage of the second pipe part (31b) is formed in an arc shape,
3. The drain water according to claim 2, wherein the lower portion of the elongated hole (31 d) is formed in an arc shape equal to the inner diameter of the lower portion of the passage of the second pipe portion (31 b). Drainage mechanism. The lowermost part (31L) of the passage of the step part (31c) is the lowermost part (22L) of the passage of the opening end part (22) on the second joint member (30) side of the first joint member (20). It is located below the lowest position (22L) of the channel | path of the opening end part (22) by the side of the said 2nd joint member (30) in the said 1st joint member (20) in the same position. The drain water drainage mechanism as described in any one of 1-3.

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