Insulated fittings for drains

Abstract

To provide a heat insulating member for drain joint which suppresses dew condensation in a drain joint member disposed in a lower part of a drain-up structure of air conditioning drain piping and to / from which the drain joint member is easily attached / detached, and a heat insulating joint for drain.SOLUTION: The present invention relates to a heat insulating member 100 for drain joint comprising: joint storage members 110L and 110R which form a space capable of storing a drain joint therein and of which outline edges 102 are separated from each other to form an opening that the drain joint can pass; a connection coupling part 150 connecting the corresponding outline edges 102 of the joint storage members 110L and 110R in a removable member with each other; air layer forming means which is disposed inside of the joint storage members 110L and 110R and forms an air layer in a gap with the drain joint; and sealing means which suppresses air circulation between the air layer and the outside.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] This invention relates to a heat-insulating member for a drain joint used in an air-conditioning drain pipe and a heat-insulating joint for a drain.

Background Art

[0002] As is well known, the drain generated by an air conditioner installed indoors is discharged outdoors using, for example, an air-conditioning drain pipe. The air-conditioning drain pipe includes, for example, a drain hose made of a cross-linked polyethylene pipe connected to the drain pipe of the air conditioner, a drain joint made of an elbow joint member, a flexible hose having flexibility, and a drain pipe connected to the flexible hose. The drain pipe, drain hose, drain joint, flexible hose, and drain pipe are connected in this order from the air conditioner side.

[0003] In addition, it is common for the air-conditioning drain pipe to have a drain-up structure that temporarily raises the pipe to a position higher than the drain outlet of the air conditioner (see, for example, Patent Document 1). Such a drain-up structure is configured by connecting a flexible hose to a drain joint installed at the lower part, directing the flexible hose upward once, and then downward at the upper end. The drain-up structure stores the drain discharged from the air conditioner in the flexible hose to prevent the odor from flowing back indoors.

[0004] On the other hand, since the drain stored in the flexible hose by the drain-up structure is at a low temperature, condensation is likely to occur on the surfaces of the drain joint and the flexible hose. Therefore, in order to prevent such condensation, it is generally practiced to wrap and cover a heat-insulating material around the drain joint.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Japanese Patent Publication No. 2018-054127 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] However, drain fittings sometimes need to be disassembled for maintenance, and wrapping insulation material around them makes it difficult to easily maintain the fittings. In addition, wrapping insulation material is time-consuming to install, and the high cost of the insulation material increases the overall installation cost.

[0007] The present invention has been made in consideration of these circumstances, and aims to provide a drain joint insulation member and drain joint that suppress condensation in the drain joint member located at the bottom of the drain-up structure of the air conditioning drain piping, and that allow the drain joint member to be easily attached and detached. [Means for solving the problem]

[0008] To solve the above problems, this invention proposes the following means. (1) A first aspect of the present invention is a drain joint heat-insulating member comprising: a joint housing member comprising a plurality of members which cooperate to form a space inside which a drain joint can be housed, and divided boundary portions formed on at least a part of the boundary portions between the members which are separated to form an opening through which the drain joint can pass; connecting means for detachably connecting the corresponding divided boundary portions of the members; air layer forming means disposed inside the joint housing member and forming an air layer between it and the drain joint; and sealing means for suppressing the flow of air between the air layer and the outside.

[0009] According to the drain joint insulation member of this invention, the joint housing member is composed of multiple members that cooperate to form a space inside which a drain joint can be housed, and whose dividing boundary portions are separated to form an opening through which the drain joint can pass. The corresponding dividing boundary portions of the members are detachably connected, so the joint housing member can be easily attached and detached, and the drain joint member can be easily and efficiently housed or removed. Furthermore, an air layer forming means is arranged inside the joint housing member, forming an air layer between it and the drain joint, thereby suppressing the transmission of the low temperature of the drain to the surface of the joint housing member via the drain joint. Furthermore, since the sealing means suppresses the flow of air between the inside and outside of the joint housing member, condensation on the surface of the drain joint that is in contact with the air layer is suppressed. As a result, condensation is suppressed on the drain fitting members arranged in the drain-up structure of the air conditioning drain piping, and the drain fitting members can be easily attached and detached.

[0010] The number of components can be set arbitrarily; for example, it could be two or three or more. Furthermore, a boundary refers to the outer edge (edge) of each component. A dividing boundary refers to a boundary that can be physically separated, and does not include, for example, parts where the boundaries between components are connected by hinges or the like and cannot be separated. Furthermore, the air layer forming means is a means for forming an air layer by creating a gap between the joint housing member and the drain joint, and is a means for suppressing direct contact between the joint housing member and the drain joint, thereby suppressing the transfer of heat from the drain joint to the housing member. For example, it can be arbitrarily set as a recess or protrusion formed in the joint housing member, or a holding means other than the drain joint (for example, piping). Furthermore, the size, thickness, and number of air layers can be set arbitrarily.

[0011] (2) The heat-insulating member for drain fittings described in (1) above may be configured such that the sealing means holds the pipe or hose connected to the drain fitting and is in close contact with the outer surface of the pipe or hose.

[0012] According to the drain fitting insulation member of this invention, the sealing means is configured to hold the pipe or hose connected to the drain fitting and to be in close contact with the outer surface of the pipe or hose. Therefore, while the drain fitting remains housed in the fitting housing member, the flow of air between the air layer inside the housing member and the outside of the housing member can be suppressed without directly holding the drain fitting. As a result, it can be easily sealed with a simple structure.

[0013] Here, the piping or hose connected to the drain fitting includes components other than the elbow member that constitutes the drain fitting, such as the receiving member into which the piping or hose is inserted.

[0014] (3) The drain joint insulation member described in (1) or (2) above may have an overlapping portion formed at the dividing boundary.

[0015] According to this invention, the heat-insulating member for drain joints is provided with an overlapping portion formed at the dividing boundary, which allows for efficient suppression of air circulation between the inside and outside of the joint housing member.

[0016] (4) The heat-insulating member for drain joints described in any one of the above items (1) to (3) comprises a connecting means arranged at the corresponding dividing boundary portions of the members, an engaging portion arranged at one of the corresponding members, and a engaged portion arranged at the other, wherein the engaging portion has an engaging claw portion and an arm portion formed on the base end side of the engaging claw portion, the engaging claw portion has a tapered portion that extends outward toward the base end and a hooking step portion formed on the base end side of the tapered portion, and the engaged portion may have a locking wall portion arranged in a position that allows the engaging claw portion to pass through when the engaging claw portion is displaced toward the inner circumference and allows the hooking step portion to be locked when the displacement of the engaging claw portion is released.

[0017] According to the heat insulation member for drain joints of the present invention, the connecting means is arranged at the split boundary parts corresponding to each other, and includes an engaging part arranged on one of the members corresponding to each other and an engaged part arranged on the other. Further, the engaging part has a tapered part that faces outward as it goes toward the proximal end side, an engaging claw part formed with a hooking step part on the proximal end side of the tapered part, and an arm part formed on the proximal end side of the engaging claw part, and the engaged part includes a locking wall part. When the engaging claw part passes under the locking wall part (inner peripheral side centered on the pipe axis), the tapered part contacts the locking wall part and is displaced to the inner peripheral side to pass under the locking wall part. Then, when the engaging claw part passes under the locking wall part, the displacement of the engaging claw part is released and the position of the locking claw part is restored to the outer peripheral side. As a result, the hooking step part is locked to the locking wall part and is not easily dropped off.

[0018] Here, the locking wall part may constitute a portal-shaped ceiling part that connects the upper parts of two leg parts erected from the other member toward the outer peripheral side, or may constitute a substantially inverted L-shaped upper beam extending as a single beam from the upper part of one leg part.

[0019] (5) The heat insulation member for drain joints according to any one of the above (1) to (4) may include two joint housing members divided by a split boundary part arranged on a split surface that includes the pipe axis of the drain joint and divides the elbow member constituting the drain joint into left and right parts including the pipe axis.

[0020] According to the heat insulation member for drain joints of the present invention, since it includes two joint housing members divided by a split boundary part arranged on a split surface that includes the pipe axis of the drain joint and divides the elbow member constituting the drain joint into left and right parts including the pipe axis, it can be formed easily and efficiently.

[0021] Here, including the pipe axis means including the pipe axis over the entire length.

[0022] (6) The heat insulation member for a drain joint according to any one of (1) to (4) above may include two joint accommodation members that are divided in the vertical direction by a division boundary portion disposed on a curved surface that includes the pipe axis of the drain joint and is perpendicular to a division surface that divides the elbow member constituting the drain joint into left and right along the pipe axis.

[0023] According to the heat insulation member for a drain joint of the present invention, it includes two members that are divided in the vertical direction by a division boundary portion disposed on a curved surface that includes the pipe axis of the drain joint and is perpendicular to a division surface that divides the elbow member constituting the drain joint into left and right along the pipe axis. Since the joint accommodation members are separated in the vertical direction, even if condensation occurs within the joint accommodation members, it is possible to suppress the condensed water from leaking to the outside.

[0024] (7) The heat insulation member for a drain joint according to any one of (1) to (6) above, the connecting means includes a first engaging portion provided on at least one of the plurality of members, and a second engaging portion provided on another of the plurality of members and engaging with the first engaging portion. The second engaging portion has a locking wall portion provided at a position spaced outward from the outer surface of another of the plurality of members. The first engaging portion has an engaging claw portion capable of passing between another of the plurality of members and the locking wall portion, and an arm portion formed on the proximal end side of the engaging claw portion and continuous with at least one of the plurality of members. A hooking step portion is formed between the engaging claw portion and the arm portion by the engaging claw portion protruding outward from the arm portion, and the hooking step portion may engage with the locking wall portion. Here, "another of the plurality of members" means all of the members other than at least one of the plurality of members.

[0025] According to the heat insulation member for a drain joint of the present invention, by engaging the first engaging portion and the second engaging portion with each other, it is possible to easily and mechanically connect the division boundary portions of the plurality of members. Furthermore, by elastically deforming the arm portion inward, the engagement between the locking wall portion and the hooking step portion can be released. Then, by the engaging claw portion passing between the other members and the locking wall portion, at least one of the members can be separated from the other members. On the other hand, with the arm portion elastically deformed inward, the engaging claw portion is passed between one of the multiple members and the locking wall portion, and when the deformation of the arm portion is released, the arm portion returns to its original shape and deforms outward, and the hooking step portion engages with the locking wall portion. Therefore, with a simple configuration consisting of a locking wall, an engaging claw, and an arm, the dividing boundaries of multiple members can be mechanically connected.

[0026] (8) The heat-insulating member for a drain joint described in any one of the above items (1) to (6) is a connecting means having a first engaging portion provided on at least one of the plurality of members, and a second engaging portion provided on the other of the plurality of members and engaging with the first engaging portion, wherein the second engaging portion is a projection provided on the other outer surface of the plurality of members, and the first engaging portion has an engaging claw portion and an arm portion formed on the base end side of the engaging claw portion and connected to at least one of the plurality of members, wherein a hooking step portion is formed between the engaging claw portion and the arm portion by the engaging claw portion protruding inward from the arm portion, and the hooking step portion may engage with the projection.

[0027] According to the drain joint insulation member of this invention, by engaging the first engaging portion and the second engaging portion with each other, the dividing boundaries of multiple members can be easily mechanically connected. Furthermore, by elastically deforming the arm outward, the engagement between the protrusion and the hooked step can be released. This allows at least one of the multiple members to be separated from the other members. On the other hand, when the arm is elastically deformed outward, the protrusion is made to pass over the engaging claw, and when the deformation of the arm is released, the arm returns to its original shape and deforms inward, causing the hooking step to engage with the protrusion. Therefore, with a simple configuration consisting of a projection, an engaging claw, and an arm, the dividing boundaries of multiple members can be mechanically connected.

[0028] (9) The drain joint insulation member described in any one of the above paragraphs (1) to (6) is wherein the ends of the plurality of members connecting the dividing boundary portions are cylindrical, and the connecting means may have a groove formed on the outer surface of the ends of the plurality of members connecting the dividing boundary portions so as to extend in the circumferential direction of the ends, a cylindrical member that covers the ends of the plurality of members connecting the dividing boundary portions from the radially outer side of the ends, and a projection provided on the inner circumferential surface of the cylindrical member that can engage with the groove.

[0029] According to the drain joint insulation member of this invention, the ends of multiple members connecting the dividing boundary portions are covered from the radially outer side by a cylindrical member, and projections are engaged with grooves formed on the ends of the multiple members. As a result, the cylindrical member becomes less likely to move relative to the ends of the multiple members in the direction along the axis of the multiple members, and the dividing boundary portions of the multiple members can be easily mechanically connected.

[0030] (10) In the drain joint insulation member described in (9) above, in the plurality of members connecting the divided boundary portions, the bottom surface of the groove may be spaced apart from the axis as it moves from the end portion along the axis of the plurality of members toward the center.

[0031] According to the drain joint insulation member of this invention, the projection makes stronger contact with the bottom surface of the groove as it moves from the end towards the center. Therefore, as the cylindrical member is tightened around its axis so that the projection faces the center, the cylindrical member with the projection can be more firmly fixed to the ends of the multiple members in which the groove is formed.

[0032] (11) The drain joint insulation member described in any one of the above paragraphs (1) to (6) is wherein the ends of the plurality of members connecting the dividing boundary portions are cylindrical, and the connecting means may have a third engaging portion provided on at least one of the plurality of members, a cylindrical member that covers the ends of the plurality of members connecting the dividing boundary portions from the radially outer side of the ends, and a fourth engaging portion provided on the cylindrical member that can engage with the third engaging portion in the axial direction of the plurality of members connecting the dividing boundary portions.

[0033] According to the drain joint insulation member of this invention, the ends of multiple members connecting the dividing boundary portions are covered from the radially outer side by a cylindrical member, and a fourth engaging portion provided on the cylindrical member is engaged in the axial direction with a third engaging portion provided on at least one of the multiple members. As a result, the cylindrical member is less likely to move in the axial direction relative to the ends of the multiple members, and the dividing boundary portions of the multiple members can be easily mechanically connected.

[0034] (12) A second aspect of the present invention is a drain joint comprising a drain joint insulation member described in any one of the above paragraphs (1) to (11), and a drain joint housed in the drain joint insulation member.

[0035] According to the drain insulation joint of this invention, condensation is suppressed on the drain joint member located at the bottom of the drain-up structure of the air conditioning drain piping, and the drain joint member can be easily attached and detached. [Effects of the Invention]

[0036] According to the drain joint insulation member and drain insulation joint of this invention, condensation is suppressed in the drain joint member located at the bottom of the drain-up structure of the air conditioning drain piping, and the drain joint member can be easily attached and detached. [Brief explanation of the drawing]

[0037] [Figure 1]This figure illustrates an example of a schematic configuration of an air conditioning drain piping system according to the first embodiment of the present invention. [Figure 2] This is a longitudinal cross-sectional view illustrating an example of the schematic configuration of a drain insulation joint according to the first embodiment. [Figure 3] This is an exploded perspective view illustrating an example of the schematic configuration of an elbow-type joint member (drain joint) according to the first embodiment. [Figure 4] This is a longitudinal cross-sectional view illustrating an example of the schematic configuration of an elbow-type joint member (drain joint) according to the first embodiment. [Figure 5] This is a perspective view illustrating the schematic configuration of the heat-insulating member for a drain joint according to the first embodiment. [Figure 6] This is an exploded perspective view illustrating the schematic configuration of the heat-insulating member for a drain joint according to the first embodiment. [Figure 7] This is an enlarged perspective view illustrating the schematic configuration of the connecting engagement portion (connecting means) of the heat-insulating member for drain joint according to the first embodiment. [Figure 8] This is an enlarged longitudinal cross-sectional view illustrating the schematic configuration of the connecting engagement portion (connecting means) of the heat-insulating member for drain joint according to the first embodiment. [Figure 9] This is a side view illustrating an example of the schematic configuration of a heat-insulating member for a drain joint according to a second embodiment of the present invention. [Figure 10] This is a plan view illustrating an example of the schematic configuration of a heat-insulating member for a drain joint according to a third embodiment of the present invention. [Figure 11] This is an exploded perspective view of a heat-insulating member for a drain joint according to a fourth embodiment of the present invention. [Figure 12] This is a cross-sectional view of the main part of the heat-insulating member for a drain joint according to the fourth embodiment. [Figure 13] This is an exploded perspective view of a heat-insulating member for a drain joint according to the first modification of the fourth embodiment of the present invention. [Figure 14] This is a cross-sectional view of a key part of a heat-insulating member for a drain joint according to a first modified example of the fourth embodiment of the present invention. [Figure 15]This is a cross-sectional view of a key part illustrating the process of connecting joint housing members in a drain joint insulation member according to a first modified example of the fourth embodiment of the present invention. [Figure 16] This is a cross-sectional view of a key part illustrating the process of connecting joint housing members in a drain joint insulation member according to a first modified example of the fourth embodiment of the present invention. [Figure 17] This is a cross-sectional view of a key part of a heat-insulating member for a drain joint according to a second modified example of the fourth embodiment of the present invention. [Figure 18] This is a cross-sectional view of the main part of a heat-insulating member for a drain joint according to a third modified example of the fourth embodiment of the present invention. [Figure 19] This is a cross-sectional view of a key part illustrating the process of connecting joint housing members in a third modified example of the fourth embodiment of the present invention. [Figure 20] This is an exploded perspective view of a heat-insulating member for a drain joint according to a fourth modification of the fourth embodiment of the present invention. [Figure 21] This is a cross-sectional view of the main part of a heat-insulating member for a drain joint according to a fourth modification of the fourth embodiment of the present invention. [Figure 22] This is a cross-sectional view of a key part of a heat-insulating member for a drain joint according to a fifth embodiment of the present invention. [Figure 23] This is a view in the direction of arrow A3 in Figure 22. [Figure 24] This is a cross-sectional view of a key part of a heat-insulating member for a drain joint according to a first modification of the fifth embodiment of the present invention. [Figure 25] This is a cross-sectional view of a key part of a heat-insulating member for a drain joint according to the sixth embodiment of the present invention. [Figure 26] This is a view in the direction of arrow A5 in Figure 25. [Figure 27] This is a cross-sectional view of a key part of a heat-insulating member for a drain joint according to the first modification of the sixth embodiment of the present invention. [Figure 28] This figure shows the relationship between the locking projection of the elbow body and the locking claw body of the header nut in a first modified embodiment of the present invention. [Modes for carrying out the invention]

[0038] <First Embodiment> The following description of the air conditioning drain piping according to the first embodiment of the present invention will be given with reference to Figure 1. Figure 1 is a diagram illustrating an example of the schematic configuration of the air conditioning drain piping according to the first embodiment of the present invention. In Figure 1, reference numeral 1 denotes an air conditioning drain pipe, reference numeral 6 denotes a flexible hose, and reference numeral 10 denotes a drain insulation fitting.

[0039] As shown in Figure 1, the air conditioning drain piping 1 includes, for example, a drain pipe 31 provided on an air conditioner 3 installed in the ceiling T, a drain hose 5, a drain insulation fitting 10, a flexible hose 6, and a drain pipe 7. Furthermore, the drain pipe 31, drain hose 5, drain insulation fitting 10, flexible hose 6, and drain piping 7 are connected to the air conditioner 3 in this order, and are configured to discharge the condensate generated by the air conditioner 3 to the outside.

[0040] As shown in Figure 1, the air conditioner 3 and the air conditioning drain pipe 1 are suspended from the building ceiling T by, for example, a suspension member 8. Furthermore, the drain pipe 31 is connected to the drain outlet of the air conditioner 3.

[0041] The material used to form the drain hose 5 can be arbitrarily determined, but for example, it is formed by laminating a foamed polyethylene layer around the outer circumference of a cross-linked polyethylene pipe or a flexible PVC pipe. Furthermore, the drain hose 5 connects the drain pipe 31 and the drain insulation fitting 10. Furthermore, the drain hose 5 is connected, for example, to an elbow-type joint member (drain joint) (described later) located inside the drain insulation joint 10. Specifically, it is fitted into a receiving member (not shown) that constitutes the elbow-type joint member (drain joint) and attached to the elbow-type joint member. Alternatively, the drain pipe 31 and the drain fitting may be directly connected without using the drain hose 5.

[0042] The flexible hose 6 is preferably made of a double-layered coated hose, for example, which consists of a soft or relatively rigid polyvinyl chloride hose covered with an insulating material such as foamed urethane on its outer circumference. Furthermore, as shown in Figure 1, the flexible hose 6 is suspended from the building ceiling surface T by a suspension member 8 via a mounting bracket 61.

[0043] As shown in Figure 1, the flexible hose 6 is positioned to rise upward from the drain insulation fitting 10, and this upward movement constitutes the drain-up structure. The flexible hose 6 is then lowered downward by the mounting bracket 61 and connected to the drain pipe 7.

[0044] Next, with reference to Figures 2 to 4, the schematic configuration of the drain insulation joint and elbow-type joint member (drain joint) according to the first embodiment will be described. Figure 2 is a longitudinal cross-sectional view illustrating an example of the schematic configuration of a drain insulation joint according to the first embodiment, Figure 3 is an exploded perspective view illustrating the schematic configuration of an elbow-type joint member (drain joint), and Figure 4 is a longitudinal cross-sectional view.

[0045] In Figures 2 to 4, reference numeral 10 denotes a drain insulation fitting, reference numeral 40 denotes an elbow-type fitting member (drain fitting), reference numeral 50 denotes the elbow body, reference numeral 60 denotes a receiving member, reference numeral 70 denotes a header nut (tightening member), and reference numeral 100 denotes an insulation member for the drain fitting. Furthermore, the symbol O1 represents the first pipe axis on the air conditioner side of the drain fitting, the symbol O2 represents the second pipe axis on the drain-up structure side, and the symbol O represents the pipe axis including the first pipe axis (axis) O1, the second pipe axis O2, and the pipe axis of the curved pipe section of the drain fitting. Additionally, the symbol F represents one end (air conditioner side), the symbol R represents the other end (fitting body side) in the direction of the first pipe axis O1, and the symbol D represents the drain-up structure side. The direction perpendicular to the pipe axis O is called the radial direction, and the direction around the pipe axis O is called the circumferential direction.

[0046] As shown in Figure 2, the drain insulation joint 10 includes, for example, an elbow-type joint member (drain joint) 40 and a drain joint insulation member 100. The elbow-type joint member (drain joint) 40 is housed inside the drain joint insulation member 100.

[0047] Furthermore, the drain insulation fitting 10 (elbow-type fitting member (drain fitting) 40) is connected to the drain hose 5 and the flexible hose 6, and in this state, the inside of the drain insulation member 100 is configured to be airtightly sealed. Furthermore, an air layer 100A is formed between the elbow-type joint member (drain joint) 40 and the drain joint insulation member 100 (joint housing member 110, described later), and the structure is configured so as not to come into contact with the outside air.

[0048] As shown in Figures 3 and 4, the elbow-type joint member (drain joint) 40 comprises, for example, an elbow body 50, a receiving member 60, and a header nut (tightening member) 70.

[0049] The elbow body 50 includes, for example, a cylindrical joint body 51, a receiving portion 52 formed at a first pipe end located at one end F of the joint body 51, an insertion port 53 formed at a second pipe end located at the other end R of the joint body 51, a flange portion 54, and a locking projection 55. Furthermore, a through hole 50H is formed inside the elbow body 50, extending along the pipe axis O.

[0050] As shown in Figures 2 to 4, the joint body 51 has, for example, a curved portion that curves when viewed from the side. This curved section is formed such that, for example, the first pipe axis O1 at the first pipe end of the joint body 51 and the second pipe axis O2 at the second pipe end intersect at approximately 90°.

[0051] The configuration of the joint body 51 can be arbitrarily set; for example, a bent portion may be provided instead of a curved portion, or a receiving portion may be provided at the end of the second pipe instead of an insertion port 53. Furthermore, the intersection angle of the first pipe axis O1 and the second pipe axis O2 of the joint body 51 can be set arbitrarily. For example, the first pipe axis O1 and the second pipe axis O2 may be configured to intersect at an angle other than 90°.

[0052] As shown in Figures 2 to 4, the receiving portion 52 has an opening 52A at one end F, and its inner circumferential surface is formed in a cylindrical shape with a larger diameter than the inner circumferential surface of the joint body 51. It is integrally connected (molded) to the first pipe end of the joint body 51 via a stepped portion 52D. Furthermore, an outer-circumferential thread 52S for tightening the header nut (tightening member) 70 is formed on the outer circumferential surface of the receiving portion 52.

[0053] As shown in Figures 2 to 4, the inlet 53 is located on the drain-up structure side D and, in the operating state, is formed in a cylindrical shape that extends upward along the second pipe axis O2. Furthermore, a flange portion 53B is formed on the outer circumferential surface of the insertion opening 53, extending radially outward from the second pipe axis O2 at the end of the second pipe, and forming a circular shape when viewed along the second pipe axis O2. Furthermore, the flange portion 53B has a rising wall portion that extends from its outer peripheral end toward the opening 53A of the insertion port 53, and the cross-section including the second pipe axis O2 is formed in a substantially L shape.

[0054] As shown in Figures 2 to 4, the flange portion 54 is, for example, positioned on the outer circumferential surface between the joint body 51 and the receiving portion 52, extending radially outward from the first pipe axis O1, and is formed in a circular shape when viewed along the first pipe axis O1. Furthermore, for example, three (or more) locking projections 55 are formed on the outer circumferential surface of the flange portion 54 at intervals in the circumferential direction.

[0055] The locking projection 55 extends outward from the outer circumferential surface of the flange portion 54, has a locking wall portion 55L at its tip that extends toward one end F, and is formed in a substantially inverted L-shape that opens toward one end F. Furthermore, a tapered surface 55T is formed on the inner circumference side (first pipe axis O1 side) of the locking wall portion 55L, which slopes closer to the first pipe axis O1 side as it moves towards the forward side C1 in the tightening direction when tightening the header nut (tightening member) 70.

[0056] The material forming the elbow body 50 can be arbitrarily set, but it is preferable that it can be bonded with an adhesive and has high chemical resistance (e.g., condensed ethanol). In this embodiment, the elbow body 50 is formed of, for example, rigid polyvinyl chloride resin. However, it may also be formed from resins other than polyvinyl chloride resin, such as polyethylene, polypropylene, and ABS resin.

[0057] As shown in Figures 2 to 4, the receiving member 60 includes, for example, a first cylindrical portion 61 located at one end F, a second cylindrical portion 62 located at the other end R, and a flange portion 65. Furthermore, inside the receiving member 60, there is a first circular hole 61H with an opening 62A at one end F centered on the pipe axis O1, and a second circular hole 62H that opens at the other end R of the second cylindrical portion 62. Furthermore, the first circular hole 61H is formed to be larger in diameter than the second circular hole 62H and is connected via a stepped portion 61D.

[0058] The first cylindrical portion 61 is formed in a cylindrical shape, for example, with the pipe axis O1 as the center. Furthermore, as shown in Figure 2, a drain hose 5 can be inserted into the first cylindrical portion 61.

[0059] As shown in Figure 2, the second cylindrical portion 62 is formed in a cylindrical shape coaxial with the first cylindrical portion 61, for example, with the pipe axis O1 as its center, and is inserted into, for example, the receiving portion 52 of the elbow body 50. Furthermore, a water-stopping member locking groove 62U extending in the circumferential direction is formed on the outer circumferential surface of the second cylindrical portion 62. Furthermore, an O-ring 80 is fitted into the water-stopping member locking groove 62U to contact the inner circumferential surface of the receiving portion 52 and stop the water flow.

[0060] As shown in Figure 3, the flange portion 65 is located, for example, between the first cylindrical portion 61 and the second cylindrical portion 62, and its outer shape is formed in the form of a circular disc (annular).

[0061] The material forming the receiving member 60 can be arbitrarily set, but it is preferable that it can be bonded with an adhesive and has high chemical resistance (e.g., condensed ethanol). In this embodiment, the receiving member 60 is formed of, for example, rigid polyvinyl chloride resin. However, it may also be formed from a resin other than polyvinyl chloride resin, such as polyethylene, polypropylene, or ABS resin.

[0062] As shown in Figures 2 to 4, the header nut (tightening member) 70 includes, for example, a bag-shaped cylindrical portion 71, a locking claw portion 75, and a tool-hanging projection portion 78.

[0063] As shown in Figures 2 to 4, the bag-shaped cylindrical portion 71 is formed in a substantially multi-stage cylindrical shape, for example, with a circular hole 71H formed on the inside along the first pipe axis O1. Furthermore, the bag-shaped cylindrical portion 71 has an internal threaded portion 71S formed on the inner surface of the circular hole 71H. This internal threaded portion 71S is configured to screw into the external threaded portion 52S of the elbow body 50. Furthermore, the bag-shaped cylindrical portion 71 has a wall portion 71L formed at one end F, from which an opening 71A with a smaller diameter than the circular hole 71H opens. The opening 71A is formed to have a smaller diameter than the outer diameter of the flange portion 65 of the receiving member 60.

[0064] As shown in Figure 3, the locking claw portion 75 comprises, for example, a locking claw body 76 and an arm portion 77 connected to the locking claw body 76.

[0065] As shown in Figure 3, the locking claw body 76 has, for example, a tapered surface 76T formed on its outer surface relative to the first pipe axis O1, which slopes closer to the first pipe axis O1 as it approaches the front side C1 in the tightening direction when tightening the header nut (tightening member) 70, and the tip side becomes thinner.

[0066] The arm portion 77 extends, for example, from the outer circumferential surface of the bag-shaped cylindrical portion 71 and is connected to the base end (rear end C2 in the tightening direction) of the locking claw body 76. Furthermore, the arm portion 77 is elastic and can bend toward the side closer to the first pipe axis O1.

[0067] When the header nut (tightening member) 70 is moved forward C1 in the tightening direction to tighten it to the elbow body 50, the tapered surface 76T of the locking claw body 76 engages with the tapered surface 55T, and the locking claw body 76 is displaced inward by the elasticity of the arm portion 77, and when the locking step portion 76D passes the locking wall portion 55L, the locking claw body 76 is locked to the locking wall portion 55L. As a result, the reverse rotation of the header nut (tightening member) 70 is suppressed.

[0068] As shown in Figure 3, the tool-holding projections 78 protrude from the outer circumferential surface of the bag-shaped cylindrical portion 71, and are arranged in groups of six (or more) at intervals in the circumferential direction. The tool-holding projection 78 is used to hook a tool when tightening and installing the header nut (tightening member) 70, or when loosening it for removal.

[0069] The material used to form the header nut (fastening member) 70 can be arbitrarily selected, but it is preferable that it has high chemical resistance (e.g., resistance to condensed ethanol). In this embodiment, the header nut (fastening member) 70 is formed from, for example, rigid polyvinyl chloride resin. However, it may also be formed from resins other than polyvinyl chloride resin, such as polyethylene, polypropylene, and ABS resin.

[0070] The assembly procedure for the elbow-type joint component (drain joint) 40 is described below. (1) First, for example, insert the socket 53 of the elbow body 50 into the flexible hose 6. Also, insert the drain hose 5 into the first cylindrical portion 61 of the receiving member 60 through the opening 71A of the header nut (tightening member) 70. At this time, it is preferable to insert the drain hose 4 until its end face abuts against the stepped portion 61D.

[0071] (2) Next, insert the second cylindrical portion 62 of the receiving member 60 into the receiving portion 52 of the elbow body 50. Insert it until the other end face R of the second cylindrical portion 62 abuts against the stepped portion 52D of the receiving portion 52. (3) Next, the receiving portion 52 is inserted into the bag-shaped cylindrical portion 71 so that the inner threaded portion 711S of the header nut (tightening member) 70 and the outer threaded portion 52S of the receiving portion 52 can be screwed together. Then, the header nut (tightening member) 70 is rotated forward C1 in the tightening direction, and the inner circumferential thread portion 711S and the outer circumferential thread portion 52S are screwed together and tightened to attach the header nut 70 to the elbow body 50.

[0072] At this time, when the header nut 70 is rotated forward C1 in the tightening direction and tightened to a predetermined position relative to the elbow body 50, the tapered surface 76T of the locking claw body 76 engages with the tapered surface 55T of the locking projection 55, and the locking claw body 76 is displaced inward by the elasticity of the arm portion 77. Then, when the locking step portion 76D of the locking claw body 76 passes the locking wall portion 55L, the position of the locking claw body 76 is displaced outward and locked to the locking wall portion 55L. When the header nut 70 is tightened, the arm portion 77 is displaced inward, so no external force acts to pull it outward, and damage to the arm portion 77 during tightening of the header nut 70 is suppressed.

[0073] Next, we will explain the heat-insulating material for drain joints with reference to Figures 2 and 5-8. Figure 5 is a perspective view of the assembled drain joint insulation component, illustrating its schematic configuration, while Figure 6 is an exploded perspective view. In the figure, reference numeral 110 denotes the joint housing portion, reference numeral 150 denotes the connecting engagement portion (connecting means), reference numeral 151 denotes the engaging portion, and reference numeral 155 denotes the engaged portion.

[0074] The material used to form the insulation member 100 for the drain joint can be arbitrarily set, but it is preferable that it has a connection structure for attachment and detachment and sufficient strength to withstand a single fall. In this embodiment, the heat-insulating member 100 for the drain joint is formed of, for example, a transparent polypropylene resin that allows the internal condition to be visually observed. Furthermore, the drain joint insulation member 100 may be formed from a resin other than polypropylene resin, and whether or not it is transparent can be arbitrarily set, or it may be formed to be opaque. Examples include polyethylene, rigid polyvinyl chloride resin, and ABS resin.

[0075] As shown in Figures 5 and 6, the drain joint insulation member 100 includes, for example, a joint housing member 110, a connecting engagement portion (connecting means) 150, an air layer forming means, and a sealing means that suppresses the flow of air between the air layer and the outside.

[0076] As shown in Figures 5 and 6, the joint housing member 110 includes, for example, an elbow member housing portion 111, a header nut housing portion 112, a drain hose holding cylinder portion 113, and a flexible hose holding cylinder portion 114.

[0077] As shown in Figure 2, the elbow member housing portion 111 is formed to have a larger diameter than the outer shape of the joint body 51 of the elbow body 50, and is a curved cylindrical shape formed to be substantially similar to the outer shape of the joint body 51, so that the joint body 51 can be housed inside. Specifically, the outer surface of the joint body 51 is formed to be 2 mm larger in radius around the pipe axis O. Furthermore, for example, a gap of 2 mm or more formed between the outer surface of the joint body 51 and the air layer 100A (see Figure 2) is formed.

[0078] As shown in Figures 2, 5, and 6, the header nut housing portion 112 is located, for example, on one end F of the elbow member housing portion 111, and is formed in a substantially cylindrical shape with a larger diameter than the outer shape of the header nut 70, the flange portion 54 of the elbow body 50, and the locking projection 55, and is capable of housing the header nut 70, the flange portion 54 of the elbow body 50, and the locking projection 55 inside.

[0079] Specifically, in this embodiment, as shown in Figure 2, the flange portion 54 and the locking projection 55 of the elbow body 50 are formed to be approximately 2 mm or more larger in radius around the pipe axis O than the outer circumferential surface. For example, a gap of 2 mm or more formed between the flange portion 54 of the elbow body 50 and the outer circumferential surface of the locking projection 55 constitutes an air layer 100A (see Figure 2). The reason for setting the thickness of the air layer 100A to 2 mm or more is that this thickness allows heat conduction to converge and be sufficiently suppressed. It is preferable not to make it any thicker than this, as it would increase the overall size. With the above configuration, the joint housing member 110 forms an air layer 100A around the entire circumference in the circumferential direction of the elbow-type joint member (drain joint) 40.

[0080] As shown in Figures 2, 5, and 6, the drain hose holding cylinder portion 113 is positioned, for example, on one end F of the header nut housing portion 120 and is formed in a substantially cylindrical shape, with an opening 113A formed on one end F. The receiving member 60 is then inserted into the opening 113A to hold the drain hose 5. Specifically, as shown in Figure 2, the drain hose holding cylinder portion 113 is configured to hold the outer circumferential surface of the receiving member 60 into which the drain hose 5 is fitted. Therefore, compared to the case where the outer surface of the drain hose 5 is directly held, heat is less likely to be transferred from the drain hose 5 to the drain joint insulation member 100. Alternatively, the drain pipe 31 and the drain fitting 40 may be directly connected without using the drain hose 5.

[0081] As shown in Figures 5 and 6, the flexible hose holding cylinder portion 114 is located on the drain-up side D of the header nut housing portion 112 and is formed in a cylindrical shape, with an opening 114A formed on the drain-up side D. The flexible hose 6 is then held in place by being sandwiched between the opening 114A. Specifically, in this embodiment, the flexible hose holding cylinder portion 114 is configured to directly hold, for example, the outer circumferential surface of the flexible hose 6, as shown in Figure 2.

[0082] Furthermore, as shown in Figures 5 and 6, the joint housing member 110 includes, for example, a left joint housing member 110L and a right joint housing member 110R, which are divided into left and right halves by a dividing surface including the pipe axis O(O1, O2). As shown in Figure 6, the left-side joint housing member 110L constitutes the left half of the joint housing member 110. As shown in Figure 6, the right-side joint insulation member 110R constitutes the right half of the joint housing member 110. Then, the left joint housing member 110L and the right joint housing member 110R are separated and divided, forming an opening (not shown) through which the elbow-type joint member (drain joint) 40 can pass.

[0083] Here, the left joint housing member 110L and the right joint housing member 110R are separate members separated by a dividing surface, and are separable from each other at their respective outer edges (boundary portion, dividing boundary portion) 102. Furthermore, the outer edges (boundary portions) 102L and 102R of the left joint housing member 110L and the right joint housing member 110R are formed complementaryly, and are designed to be butt joint end faces that can be joined together.

[0084] Then, by butting the outer edges (boundary sections) 102L and 102R together and combining the left joint housing member 110L and the right joint housing member 110R, the joint housing member 110 prevents air from flowing through the outer edge (boundary section, dividing boundary section) 102. The ends of the joint housing members 110L and 110R, which connect the divided boundary sections, in the direction of the pipe axis O are each cylindrical. Furthermore, it includes a joint housing member 110 and overlapping portions 105 formed on the outer edge (boundary portion, dividing boundary portion) 102. Furthermore, in this embodiment, the overlapping portions 105 are formed alternately, for example, with respect to the pipe axis O of the joint housing member 110, as shown in Figure 6.

[0085] Specifically, as shown in Figure 6, on the lower side of the left joint housing member 110L, there is an overlapping portion 105L which has an inner circumferential surface larger than the outer circumferential surface of the right joint housing member 110R, extends beyond the outer edge (boundary portion, dividing boundary portion) 102R, and overlaps with the outer circumferential surface of the right joint housing member 110R.

[0086] Furthermore, as shown in Figure 6, an overlapping portion 105R is formed on the upper side of the right joint housing member 110R, which has an inner circumferential surface larger than the outer circumferential surface of the left joint housing member 110L, extends beyond the outer edge portion (boundary portion, dividing boundary portion) 102L, and overlaps with the outer circumferential surface of the left joint housing member 110L.

[0087] <Means for forming an air layer> In this embodiment, the gap formed inside the joint housing member 110 constitutes an air layer forming means. The configuration of the air layer forming means can be arbitrarily set.

[0088] <Sealing means> Furthermore, in this embodiment, the drain hose holding cylinder portion 113, the flexible hose holding cylinder portion 114, the complementaryly formed outer edge portions (boundary portions) 102L and 102R, and the overlapping portion 105 constitute a sealing means that suppresses the flow of air between the air layer 100A and the outside. The configuration of the sealing means can be arbitrarily set.

[0089] The following describes the general configuration of the connecting engagement part (connecting means) with reference to Figures 7 and 8. Figure 7 is an enlarged perspective view illustrating the schematic configuration of the connecting engagement portion (connecting means), and Figure 8 is an enlarged longitudinal cross-sectional view. In Figures 7 and 8, reference numeral 152 denotes an engaging claw, reference numeral 152L denotes a locking step (hooking step), and reference numeral 152T denotes a tapered surface (tapered portion).

[0090] As shown in Figures 5 and 6, the connecting engagement portion (connecting means) 150 is arranged, for example, on the outer circumference side of the outer edge portion (boundary portion) 102 of the corresponding position of the joint housing member 110. Furthermore, the connecting engagement portion (connecting means) 150 includes, for example, an engaging portion 151 and an engaged portion 155. In this embodiment, as shown in Figure 6, for example, the engaging portion 151 is positioned on the side where the overlapping portions 105L and 105R (105) are formed, and is arranged alternately on the joint housing members 110L and 110R (110). Furthermore, in this embodiment, a total of three (or more) are arranged on the upper and lower sides of the header nut housing 112, and at the other end R of the elbow member housing 111. Furthermore, the number and arrangement of the connecting engagement portion (connecting means) 150 can be arbitrarily set, taking into consideration the airtightness at the outer edge (boundary portion) 10 of the joint housing member 110.

[0091] The engaging portion 151 includes, for example, an engaging claw 152 located on the tip side 151F and an arm portion 153 formed on the base end side (the side connected to the joint housing member) 151E of the engaging claw portion 152.

[0092] As shown in Figures 7 and 8, the engaging claw 152 has a tapered surface (tapered portion) 152T that slopes inward (towards the outer surface of the joint housing member) as it approaches the tip side 151F. Furthermore, a locking step (hooking step) 152L that is recessed inward is formed on the base end side 151E of the engaging claw 152. For secure locking, it is preferable that the hook of the locking step (hooking step) 152L be formed to be 1 mm or more. In this embodiment, the tip end 151F of the arm portion 153 is elastically deformable inward in the direction of arrow T1.

[0093] The engaged portion 155 comprises, for example, two legs and a locking wall connecting the upper ends of these legs, and is formed in a gate shape. A through hole 155H is formed inward, penetrating in the attachment / detachment direction.

[0094] Attachment and detachment using the connecting engagement part (connecting means) 150 are performed according to the following procedure. (1) First, the left joint housing member 110L and the right joint housing member 110R are brought close together while aligning the engaging portion 151 and the engaged portion 155. (2) Insert the engaging portion 151 toward the tip side 151F into the through hole 155H of the engaged portion 155 in the direction of arrow T2. Then, the tapered surface (tapered portion) 152T comes into contact with the locking wall located above the locked portion 155, causing the tip side 151E of the arm portion 153 to elastically deform downwards, and the engaging portion 151 passes through the through hole 155H. After the engaging portion 151 has finished through the through hole 151, the arm portion 153 elastically deforms upwards, and the locking step portion (hooking step portion) 152L is locked to the locking wall of the locked portion 155.

[0095] As a result, it is possible to prevent the left joint housing member 110L and the right joint housing member 110R from coming apart. Furthermore, since the engaging portion 151 deforms inward, no external force acts on the engaging portion 151 to pull it apart outward, thus preventing damage to the engaging portion 151.

[0096] According to the drain joint insulation member 100 of the first embodiment, by dividing and separating the joint housing member 110 at the outer edge portion (boundary portion, dividing boundary portion) 102, an opening is formed through which the drain joint can pass, and the joint housing member 110 can be easily attached and detached to easily and efficiently house or remove the drain joint member. Furthermore, since an air layer 100A is formed inside the joint housing member 110, the low-temperature heat of the drain is suppressed from being transmitted to the surface of the joint housing member 110 via the drain joint. Furthermore, since the sealing means suppresses the flow of air between the inside and outside of the joint housing member 110, condensation can be suppressed. As a result, condensation is suppressed in the drain joint member 10 located in the air conditioning drain pipe 1, and the drain joint member 10 can be easily attached and detached.

[0097] Furthermore, with the drain joint insulation member 100, it is not necessary to directly hold the drain joint while the drain joint is housed within the joint housing member 110, and the flow of air between the air layer 100A inside the joint housing member 110 and the outside can be suppressed.

[0098] Furthermore, with the drain joint insulation member 100, an air layer 100A is formed around the entire circumference of the drain joint, which effectively suppresses the transmission of the low temperature of the drain to the containment member.

[0099] Furthermore, with the drain joint insulation member 100, since an air layer 110A of 2 mm or more is formed, heat transfer from the drain joint can be efficiently suppressed. Furthermore, it is possible to suppress the increase in size of the insulation member 100 for the drain joint.

[0100] Furthermore, since the drain joint insulation member 100 is equipped with an overlapping portion 105, it can efficiently suppress the flow of air between the inside and outside of the joint housing member 110.

[0101] Furthermore, the drain joint insulation member 100 is equipped with a connecting engagement portion (connecting means) 150, which allows for efficient attachment and detachment, and prevents the joint housing member 110 from coming off.

[0102] According to the drain joint insulation member of this invention, the engaging claw portion has a hooking step portion with a hooking depth of 1 mm or more, so that the members can be easily and efficiently attached and detached from each other. In addition, it is possible to prevent the attached members from coming apart from each other.

[0103] Here, the locking wall may form a gate-shaped ceiling section connecting the upper parts of two legs erected from the other side member toward the outer periphery, or it may form a roughly inverted L-shaped upper beam extending as a single beam from the upper part of one leg.

[0104] <Second Embodiment> A second embodiment of the present invention will be described below with reference to Figure 9. Figure 9 is a side view illustrating an example of a schematic configuration of a heat-insulating member for a drain joint according to a second embodiment of the present invention. In Figure 9, reference numeral 200 denotes a heat-insulating member for the drain joint, reference numeral 210 denotes a joint housing member, reference numeral 210A denotes a lower joint housing member, and reference numeral 210B denotes an upper joint housing member.

[0105] As shown in Figure 9, the drain joint insulation member 200 includes, for example, a joint housing member 210, a connecting engagement portion (connecting means) 150, a connecting engagement portion (connecting means) 160, an air layer forming means, and a sealing means that suppresses the flow of air between the air layer and the outside.

[0106] As shown in Figure 9, the joint housing member 210 includes, for example, an elbow member housing portion 111, a header nut housing portion 112, a drain hose holding cylinder portion 113, and a flexible hose holding cylinder portion 114.

[0107] Furthermore, as shown in Figure 9, the joint housing member 210 includes, for example, a lower joint housing member 210A and an upper joint housing member 210B, which are divided vertically by a dividing surface formed along the pipe axis O, perpendicular to the plane containing the pipe axis O(O1, O2).

[0108] The lower joint housing member 210A has an outer edge portion (boundary portion, dividing boundary portion) (not shown) formed on its lower end face. The upper joint housing member 210B has an outer edge portion (boundary portion, dividing boundary portion) (not shown) formed on its upper end face. The lower joint housing member 210A and the upper joint housing member 210B are separated vertically, forming an opening through which the drain joint member can be attached and detached.

[0109] As shown in Figure 9, the drain joint insulation member 200 includes, for example, a lower member (member) 210 and an upper member 220. The drain joint insulation member 200 constitutes a drain joint by housing an elbow-type joint member (drain joint) (not shown) in an internally formed housing space (not shown).

[0110] The connecting engagement portion (connecting means) 160 includes an engaging portion 161 and an engaged portion 165, instead of the engaging portion 151 and engaged portion 155 in the first embodiment. The connecting engagement portion (connecting means) 160 differs from the connecting engagement portion (connecting means) 150 in that it includes an extension portion 164 for changing the orientation of the engaging portion 151. Other than the same components as the drain joint insulation member 100 according to the first embodiment, the same reference numerals are used and their description is omitted.

[0111] According to the drain joint insulation member 200 of the second embodiment, since the joint housing member 210 is spaced apart in the vertical direction, even if condensation occurs inside the joint housing member 210, leakage of the condensed water to the outside is suppressed.

[0112] <Third Embodiment> A third embodiment of the present invention will be described below with reference to Figure 10. Figure 10 is a plan view illustrating an example of a schematic configuration of a heat-insulating member for a drain joint according to a third embodiment of the present invention. In Figure 10, reference numeral 300 denotes a heat-insulating member for the drain joint, reference numeral 310 denotes a joint housing member, and reference numeral 320 denotes a hinge portion (hinge).

[0113] As shown in Figure 10, the drain joint insulation member 300 includes, for example, a joint housing member 310, a connecting engagement portion (connecting means) 150, an air layer forming means, and a sealing means that suppresses the flow of air between the air layer and the outside.

[0114] As shown in Figure 10, the joint housing member 310 includes, for example, an elbow member housing portion 111, a header nut housing portion 112, a drain hose holding cylinder portion 113, and a flexible hose holding cylinder portion 114.

[0115] Furthermore, as shown in Figure 10, the joint housing member 310 includes, for example, a left joint housing member 110L and a right joint housing member 110R, which are divided into left and right halves by a dividing surface including the pipe axis O(O1, O2), and a hinge portion (hinge) 320. The left joint housing member 110L and the right joint insulation member 110R are the same as in the first embodiment, so they are denoted by the same reference numerals and their description is omitted.

[0116] As shown in Figure 10, the hinge portion (hinge) 320 is positioned, for example, on the other end R of the part corresponding to the elbow member housing portion 111 of the left joint housing member 110L and the right joint insulation member 110R, and connects the outer edges (boundary portion, dividing boundary portion) of the left joint housing member 110L and the right joint insulation member 110R in a bendable manner.

[0117] As the hinge portion (hinge) 320 bends, the left joint housing member 110L and the right joint insulation member 110R rotate in the direction of arrow C3, separating from each other at their respective outer edges (boundary portion, dividing boundary portion) 102, and forming an opening (not shown) in the joint housing member 310 through which the elbow-type joint member (drain joint) 40 can pass. Other aspects are the same as in the first embodiment, so the same reference numerals are used and their explanation is omitted.

[0118] According to the drain joint insulation member 300 of the third embodiment, the elbow-type joint member (drain joint) 40 can be efficiently attached and detached.

[0119] <Fourth Embodiment> A fourth embodiment of the present invention will be described below with reference to Figures 11 to 21. Figure 11 is an exploded perspective view of the drain joint insulation member 400 according to the fourth embodiment of the present invention. As shown in Figure 11, the drain joint insulation member 400 includes a connecting engagement portion (connecting means) 405 and a clamping portion 406 in place of the connecting engagement portion 150 of the drain joint insulation member 100 in the first embodiment.

[0120] The connecting engagement portion 405 mechanically connects the dividing boundary portions of the joint housing members 110L and 110R. The connecting engagement portion 405 has a first engagement portion 409 and a second engagement portion 410. There is no limit to the number of connecting engagement portions 405 provided in the drain joint insulation member 400, but in this embodiment, the joint housing members 110L and 110R are provided with multiple (three in this embodiment) engagement portions 409 and 410. The number of first engagement portions 409 provided in the right-side joint housing member (at least one of the multiple members) 110R, and the number of second engagement portions 410 provided in the left-side joint housing member (the other of the multiple members) 110L are equal to each other. The engaging portions 409 and 410 are provided on the outer (hereinafter referred to as the outer part of the curve) and inner (hereinafter referred to as the inner part of the curve) portions of the elbow-type joint member 40 in the header nut housing portion 112, respectively. The engaging portions 409 and 410 are provided on the outer part of the curve in the elbow member housing portion 111.

[0121] The first engaging portion 409 is provided on the inner part of the curve at the division boundary of the right joint housing member 110R, and on the outer part of the curve at the division boundary of the left joint housing member 110L, respectively. The second engaging portion 410 is provided on the inner part of the curve at the division boundary of the left joint housing member 110L, and on the outer part of the curve at the division boundary of the right joint housing member 110R, respectively. The second engaging portion 410 engages with the first engaging portion 409 in the circumferential direction.

[0122] As shown in Figure 12, for example, the first engaging portion 409 has an engaging claw portion 413 and an arm portion 414. Here, the side in the circumferential direction that faces the dividing boundary of the right-side joint housing member 110R, where the first engagement portion 409 is provided, is referred to as the tip side F4. The side in the circumferential direction opposite to the tip side F4 is referred to as the base end side R4. The engaging claw portion 413 is positioned on the tip side F4 of the dividing boundary portion of the right joint housing member 110R. The radially outer (outward) surface of the engaging claw portion 413 is a tapered surface 413T that is inclined radially outward as it approaches the base end side R4. The arm portion 414 is formed on the base end side R4 of the engaging claw portion 413. The arm portion 414 is connected to the outer surface (radially outer surface) of the right joint housing member 110R. Between the engaging claw portion 413 and the arm portion 414, a hooking step portion 409L is formed as the engaging claw portion 413 protrudes radially outward from the arm portion 414.

[0123] The second engaging portion 410 has a locking wall portion 417 and a pair of legs 418. The locking wall portion 417 is provided at a position radially outward from the outer surface of the left joint housing member 110L. The pair of legs 418 extend radially inward (inward) from each end of the locking wall portion 417 in the direction of the first pipe axis O1 to the left joint housing member 110L. The locking wall portion 417 and the pair of legs 418 form a through hole 410a that penetrates the second engagement portion 410 in the circumferential direction. The second engaging portion may also be provided with only one leg portion 418. In this case, the through hole 410a is not formed in the second engaging portion, and the second engaging portion has a cantilever structure. The engaging claw portion 413 can pass through the through hole 410a of the second engaging portion 410 (between the left joint housing member 110L and the locking wall portion 417). The hooking step portion 409L engages with the locking wall portion 417 in the circumferential direction.

[0124] As shown in Figures 11 and 12, the clamping portion 406 is plate-shaped. The clamping portion 406 is provided on the inner surface of the right joint housing member 110R so as to be radially opposite to the arm portion 414 of the first engaging portion 409. The clamping portion 25 protrudes from the tip side F4 beyond the dividing boundary portion 35Rb. The clamping portion 25, together with the arm portion 414, clamps the dividing boundary portion of the left joint housing member 110L radially.

[0125] The left-side joint housing member 110L, and the overlapping portion 105L, clamping portion 406, and engaging portions 409, 410 provided on the left-side joint housing member 110L are integrally formed from a synthetic resin such as polyvinyl chloride resin, olefin resin, or ABS. This synthetic resin is an elastic material. The color of this synthetic resin may be transparent or opaque. The right-side joint housing member 110R is the same as the left-side joint housing member 110L.

[0126] According to the drain joint insulation member 400 of the fourth embodiment, the dividing boundary portions of the joint housing members 110L and 110R are mechanically connected by a connecting engagement portion 405 having engaging portions 409 and 410. Therefore, the joint housing members 110L and 110R can be easily connected to each other regardless of the material on which the joint housing members 110L and 110R are formed.

[0127] The connecting engagement portion 405 has a first engagement portion 409 and a second engagement portion 410. Therefore, by engaging the first engagement portion 409 and the second engagement portion 410 with each other, the dividing boundary portions of the joint housing members 110L and 110R can be easily mechanically connected. The second engaging portion 410 has a locking wall portion 417, and the first engaging portion 409 has an engaging claw portion 413 and an arm portion 414. By elastically deforming the arm portion 414 radially inward, the engagement between the locking wall portion 417 and the hooking step portion 409L can be released. Then, the engaging claw portion 413 passes between the left joint housing member 110L and the locking wall portion 417, thereby separating the right joint housing member 110R and the left joint housing member 110L. On the other hand, with the arm portion 414 elastically deformed radially inward, the engaging claw portion 413 is passed between the left joint housing member 110L and the locking wall portion 417, and when the deformation of the arm portion 414 is released, the arm portion 414 returns to its original shape radially outward, and the hooking step portion 409L engages with the locking wall portion 417. Therefore, the dividing boundary portions 35 of the joint housing members 110L and 110R can be mechanically connected with a simple configuration consisting of a locking wall portion 417, an engaging claw portion 413, and an arm portion 414. This makes it easier to manufacture the heat-insulating member 400 for the drain joint.

[0128] Since a tapered surface 413T is formed on the engaging claw portion 413, it becomes easier to insert the engaging claw portion 413 into the through hole 410a of the second engaging portion 410. The drain joint insulation member 400 is equipped with a clamping portion 406. The arm portion 414 and the clamping portion 406 can more reliably suppress the flow between the air layer 100A and the air outside the drain joint insulation member 400, passing between the dividing boundary portions of the joint housing member pieces 35L and 35R.

[0129] The insulation member for the drain joint in this embodiment can be modified in various ways, as described below. As shown in Figures 13 and 14, the first modified example of the drain joint insulation member 400A may be provided with a first overlapping portion 430 instead of the overlapping portion 105 and the clamping portion 406 of the drain joint insulation member 400. For example, the first overlapping portion 430 is formed in a plate shape and is positioned on the outer surface of the right joint housing member 110R. The first overlapping portion 430 is positioned offset from the arm portion 414 (first engaging portion 409) along the dividing boundary of the right joint housing member 110R. The first overlapping portion 430 is in contact with the outer surface of the left joint housing member 110L. The length of the first overlapping portion 430 extending from the dividing boundary of the right joint housing member 110R toward the tip side F4 will be explained in the step of engaging the first engaging portion 409 and the second engaging portion 410.

[0130] The first overlapping portion 430 and the arm portion 414 are positioned at the dividing boundary of the right-side joint housing member 110R, with their positions offset along this dividing boundary. Therefore, when the arm portion 414 is elastically deformed in the radial direction, the first overlapping portion 430 moves radially in conjunction with that deformation.

[0131] As shown in Figure 15, in the drain joint insulation member 400A, when the joint housing members 110L and 110R are separated, and the first engaging portion 409 and the second engaging portion 410 are engaged to connect the dividing boundary portions of the joint housing members 110L and 110R, the first overlapping portion 430 contacts the outer surface of the left joint housing member 110L before the engaging claw portion 413 contacts the locking wall portion 417. As a result, the first overlapping portion 430 rides up onto the outer surface of the left joint housing member 110L.

[0132] In the first modified example of the drain joint insulation member 400A, the first overlapping portion 430 contacts the outer surface of the left joint housing member 110L, and then, as the engaging claw portion 413 contacts the locking wall portion 417, the arm portion 414 elastically deforms radially inward, causing the first overlapping portion 430 to move radially inward as well. However, the movement of the first overlapping portion 430 is restricted by the outer surface of the left joint housing member 110L. Subsequently, as shown in Figure 16, when the engaging claw portion 413 passes through the through hole 41a, the arm portion 414 elastically deforms radially inward, but the radially inward movement of the first overlap portion 430 is restricted by the outer surface of the left joint housing member 110L. Therefore, when connecting the dividing boundaries of the joint housing members 110L and 110R, the first overlapping portion 430 can be easily brought into contact with the outer surface of the left joint housing member 110L. Furthermore, this first overlapping portion 430 can suppress the flow between the air layer 100A and the air outside the drain joint insulation member 400A that passes between the dividing boundaries of the joint housing members 110L and 110R.

[0133] In the second modified example of the drain joint insulation member 400B shown in Figure 17, when connecting the dividing boundary portions of the joint housing members 110L and 110R, the engaging claw portion 413 contacts the locking wall portion 417, and then the first overlap portion 430 contacts the outer surface of the left joint housing member 110L. As a result, the arm portion 414 elastically deforms radially inward as the engaging claw portion 413 contacts the locking wall portion 48, and in conjunction with this, the first overlap portion 430 also moves radially inward. The moved first overlap portion 430 may abut against the left joint housing member 110L, making it difficult to bring the first overlap portion 430 into contact with the outer surface of the left joint housing member 110L.

[0134] As shown in the third modified example of the drain joint insulation member 400C in Figure 18, the drain joint insulation member 400A may be provided with a first engaging portion 435, a projection (second engaging portion) 436, and a second overlapping portion 437 instead of the first engaging portion 409, second engaging portion 410, and overlapping portion 105. The projection 436 is provided on the outer surface of the left joint housing member 110L. The projection 436 protrudes radially outward from the outer surface of the left joint housing member 110L. In the first engaging portion 409, a hooking step portion 435L is formed between the engaging claw portion 413 and the arm portion 414, as the engaging claw portion 413 protrudes radially inward from the arm portion 414. The hooking step portion 435L engages with the projection portion 436 in the circumferential direction.

[0135] The second overlapping portion 437 is positioned on the right-side joint housing member 110R, offset from the arm portion 414 along the dividing boundary of the right-side joint housing member 110R. The second overlapping portion 437 protrudes towards the tip side F4 beyond the dividing boundary of the right-side joint housing member 110R. The second overlapping portion 437 contacts the outer surface of the left-side joint housing member 110L.

[0136] In the third modified example of the drain joint insulation member 400C, the engagement between the projection 436 and the hooking step portion 435L can be released by elastically deforming the arm portion 414 radially outward. This allows the right joint housing member 110R and the left joint housing member 110L to be separated. On the other hand, in the drain joint insulation member 400C, when connecting the dividing boundary portions of the joint housing members 110L and 110R by engaging the first engaging portion 435 and the projection 436 from a state in which the joint housing members 110L and 110R are separated, the following steps are performed. That is, as shown in Figure 19, with the arm portion 414 elastically deformed radially outward, the projection 66 is made to pass over the engaging claw portion 44, and when the deformation of the arm portion 45 is released, the arm portion 45 returns to its original shape and deforms radially inward, and the hooking step portion 65L engages with the projection 436 in the circumferential direction. Therefore, the dividing boundary portions of the joint housing members 110L and 110R can be mechanically connected with a simple configuration consisting of a projection 436, an engaging claw portion 413, and an arm portion 414.

[0137] In the fourth modified example of the drain joint insulation member 400D shown in Figures 20 and 21, the first engaging portion 435 and projection 436 of the drain joint insulation member 400C of the third modified example are replaced with a projection 440 and an engaging projection 441. The protrusion 440 is provided on the outer surface of the right-side joint housing member 110R at the division boundary. Preferably, the protrusion 440 is provided along the entire length of the division boundary. The engagement strip portion 441 comprises a main body 444 and an engagement strip 445. The main body 444 is provided on the outer surface of the division boundary portion of the left joint housing member 110L. The main body 444 protrudes toward the tip side of the division boundary portion of the left joint housing member 110L. The engagement strip 445 protrudes radially inward from the tip end of the main body 444. Preferably, the engagement strip portion 441 is provided along the entire length of the division boundary portion of the left joint housing member 110L. The protruding ridge 440 and the engaging ridge 445 of the engaging ridge portion 441 engage in the circumferential direction. In the fourth modified example of the drain joint insulation member 400D configured in this way, the joint housing members 110L and 110R can be engaged with each other along the entire length of the dividing boundary. Alternatively, the protrusion 440 may be provided on the left joint housing member 110L, and the engaging ridge portion 441 may be provided on the right joint housing member 110R.

[0138] <Fifth Embodiment> A fifth embodiment of the present invention will be described below with reference to Figures 22 to 24. As shown in Figures 22 and 23, the drain joint insulation member 500 of this embodiment is equipped with a connecting engagement portion 501 in place of the connecting engagement portion 150 in the drain joint insulation member 100 of the first embodiment. The connecting engagement portion 501 is preferably provided at each end of the drain joint insulation member 500 that holds the receiving member 60 and the flexible hose 6. The following describes the connecting engagement portion 501 that holds the receiving member 60.

[0139] The connecting engagement portion 501 includes grooves 502 formed on the outer surface of the ends of the joint housing members 110L and 110R that connect the divided boundary portions, and cap nuts 503 that connect the joint housing members 110L and 110R to each other. The groove 502 extends in the circumferential direction. In this embodiment, it is preferable that the groove 502 is formed spirally around the first pipe axis O1, spanning the joint housing members 110L and 110R. The spirally formed groove 502 forms the female thread 505. As shown in Figure 22, in the joint housing members 110L and 110R that connect the divided boundary portions, it is preferable that the bottom surface of the groove 502 is spaced apart from the first pipe axis O1 as it moves from one end F along the first pipe axis O1 towards the other end R (from the end to the center). The groove 502 may be formed in only one of the joint housing members 110L or 110R.

[0140] The cap nut 503 has a cylindrical member 507 and a projection 508. The cylindrical member 507 has a side wall 509 and a bottom wall 510. The side wall 509 covers one end F of the joint housing members 110L and 110R, which are formed in a cylindrical shape and connect the dividing boundary portions, from the radially outer side. The bottom wall 510 is formed in an annular shape and is provided at the end of one end F of the side wall 509. The bottom wall 510 protrudes radially inward from the end of the side wall 509. The projection 508 is provided on the inner circumferential surface of the side wall 509. The projection 508 is engageable with the female screw 505 (groove 502). Preferably, the projection 508 is formed spirally around the first pipe axis O1. The spirally formed projection 508 forms the male screw 511.

[0141] In the drain joint insulation member 500 of this embodiment, configured as described above, the ends of the joint housing members 110L and 110R, which connect the divided boundary portions, are covered from the radially outer side by the cylindrical member 507, and the projection 508 is engaged with the groove 502 formed at the ends of the joint housing members 110L and 110R. As a result, the cylindrical member 507 is less likely to move in the direction along the first pipe axis O1 relative to the ends of the joint housing members 110L and 110R, and the divided boundary portions of the joint housing members 110L and 110R can be easily mechanically connected. As the projection 508 moves from one end F to the other end R, the projection 508 makes stronger contact with the bottom surface of the groove 502. Therefore, as the cylindrical member 507 is tightened around the first pipe axis O1 so that the projection 508 moves toward the other end R, the cylindrical member 507 provided with the projection 508 can be more firmly fixed to the ends of the joint housing members 110L and 110R in which the groove 502 is formed.

[0142] Furthermore, as shown in Figure 24, the drain joint insulation member 500A of the first modified example may be provided with a connecting engagement portion 501A instead of the connecting engagement portion 501 of the drain joint insulation member 500 of the fifth embodiment. The connecting engagement portion 501A has a sealing member 514 in addition to the components of the connecting engagement portion 501. The sealing member 514 is formed in an annular shape from an elastic material such as synthetic resin. The sealing member 514 is positioned between the end face F of one end of the joint housing members 110L and 110R and the bottom wall 510. The inner periphery of the sealing member 514 contacts the outer surface of the receiving member 60 of the elbow-type joint member 40. The sealing member 514 seals the space between the joint housing members 110L and 110R and the receiving member 60 (elbow-type joint member 40).

[0143] In the first modified example of the drain joint insulation member 500A configured in this way, the sealing member 514 can suppress the flow between the air layer 100A and the air outside the drain joint insulation member 500A, which passes between the joint housing members 110L, 110R and the elbow-type joint member 40. Furthermore, the groove may be a so-called bayonet groove.

[0144] <Sixth Embodiment> A sixth embodiment of the present invention will be described below with reference to Figures 25 to 27. As shown in Figures 25 and 26, the drain joint insulation member 600 of this embodiment is equipped with a connecting engagement portion 601 in place of the connecting engagement portion 150 in the drain joint insulation member 100 of the first embodiment. The connecting engagement portion 601 includes a third engagement portion 603 provided on the joint housing members 110L and 110R, and a cap 604. The third engaging portion 603 is a projection provided on the outer surface of the joint housing members 110L and 110R. Preferably, the third engaging portion 603 is provided on the outer surface of the joint housing members 110L and 110R, extending around the entire circumference in the circumferential direction. The cap 604 has the cylindrical member 507 and the fourth engaging portion 607. The fourth engaging portion 607 is a projection provided on the inner surface of the side wall 509 (cylindrical member 507). Preferably, the fourth engaging portion 607 is provided on the side wall 509 over its entire circumference. The fourth engaging portion 607 can engage with the third engaging portion 603 in the direction of the first pipe axis O1.

[0145] In the drain joint insulation member 600 of this embodiment, configured as described above, the ends of the joint housing members 110L and 110R, which connect the divided boundary portions, are covered from the radially outer side by the cylindrical member 507, and the fourth engaging portion 607 provided on the cylindrical member 507 is engaged with the third engaging portion 603 provided on the joint housing members 110L and 110R in the direction of the first pipe axis O1. As a result, the cylindrical member 507 becomes difficult to move in the direction of the first pipe axis O1 relative to the ends of the joint housing members 110L and 110R, and the divided boundary portions of the joint housing members 110L and 110R can be easily mechanically connected.

[0146] Furthermore, as shown in Figure 27, the first modified example of the drain joint insulation member 600A may be provided with a connecting engagement member 601A instead of the connecting engagement member 601 of the sixth embodiment. The connecting engagement member 601A has the sealing member 514 in addition to the components of the connecting engagement member 601. The drain joint insulation member 600A of the first modified embodiment can also achieve the same effect as the drain joint insulation member 500A of the first modified embodiment.

[0147] It should be noted that the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.

[0148] For example, in the above embodiment, a case was described in which an air layer is formed between the drain joint insulation member 100 and the elbow body 50, extending over the entire length of the elbow body 50 in the direction of the pipe axis O and the entire circumference of the outer surface. However, it is also possible to configure the system so that an air layer is not formed by the elbow body 50 and the drain joint insulation member 100 contacting each other in a part of the direction of the pipe axis O and in the circumferential direction, or so that an air layer is not formed by filling the air layer with a fibrous insulation material or a foamed resin insulation material.

[0149] Furthermore, in the above embodiment, the case in which the air layer formed around the drain joint insulation member 100 and the elbow body 50 is formed to a thickness of 2 mm was described. However, the thickness of the air layer can be set arbitrarily, and may be set to a greater than 2 mm or to a less than 2 mm. In addition, the thickness may be set to be different in parts of the area around the elbow body 50.

[0150] Furthermore, although the above embodiment described a case in which the sealing means tightly seals and holds the pipe 5 or flexible hose 6 connected to the elbow-type joint member (drain joint) 40, the flow of air between the inside and outside of the joint housing member may be sealed at a part other than the outer circumferential surface of the pipe 5 or flexible hose 6. For example, the drain hose holding cylinder portion 113 may hold the outer circumferential surface of the drain hose 5 instead of the outer circumferential surface of the receiving member 60, and the flexible hose holding cylinder portion 114 may hold the outer circumferential surface of the joint body 51 or flange portion 53B instead of the outer circumferential surface of the flexible hose 6.

[0151] Furthermore, although the above embodiment described a case in which an overlapping portion 105 is formed on the outer edge (boundary portion, dividing boundary portion) 102 of the drain joint insulation member 100, whether or not to form an overlapping portion 105 on the outer edge (boundary portion, dividing boundary portion) 102 can be set arbitrarily, and for example, a configuration in which the end faces of the members abut against each other is also possible.

[0152] Furthermore, in the above embodiment, the case in which the connecting engagement portion (connecting means) 150 for connecting the drain joint insulation member 100 has an engaging portion 151 and an engaged portion 155 was described. However, whether or not the connecting engagement portion (connecting means) has an engaging portion and an engaged portion can be arbitrarily set, and for example, the members may be connected by connecting means other than the engaging portion 151 and the engaged portion 155. In addition, the number and arrangement of the connecting engagement portions (connecting means) can be arbitrarily set.

[0153] Furthermore, although the above embodiment described a case in which the drain insulation joint 10 includes an elbow-type joint member (drain joint) 40, the configuration of the elbow-type joint member (drain joint) can be arbitrarily set.

[0154] As shown in Figure 28, it is preferable that the outer surface 76A of the locking claw body 76 of the header nut 70, which engages with the locking wall portion 55L of the elbow body 50, is inclined to approach the first pipe axis O1 side as it moves toward the forward side C1 in the tightening direction when tightening the header nut 70. It is also preferable that the outer surface 55M of the locking wall portion 55L, which engages with the outer surface 76A of the locking claw body 76, is inclined to approach the first pipe axis O1 side as it moves toward the forward side C1 in the tightening direction. The header nut 70 is tightened to the outer thread 52S of the elbow body 50 by rotating it forward C1 in the tightening direction around the first pipe axis O1. By configuring the outer surfaces 76A and 55M in this way, the locking claw body 76 becomes less likely to come off the locking wall portion 55L.

[0155] Furthermore, it is possible to replace the components in the above embodiments with well-known components as appropriate, without departing from the spirit of the present invention, and the above embodiments may also be applied in appropriate combinations. [Explanation of Symbols]

[0156] O1 Pipe axis (axis) on the air conditioner side of the drain fitting O2 drain-up side pipe axis O Pipe axis including curved sections of drain fittings, etc. 100A air layer 1. Drain piping for air conditioning 10. Insulated fittings for drains 40 Elbow-type joint components (drain fittings) 50 Elbow body 100, 200, 300, 400, 400A, 400B, 400C, 400D, 500, 500A, 600, 600A Insulation material for drain fittings 113 Drain hose retaining cylinder (sealing part) 114 Flexible hose holding cylinder (sealing part) 110 Joint housing member (joint housing member, member) 110L Left-side joint housing component (joint housing component, component, other of multiple components) 110R Right-side joint housing member (joint housing member, member, at least one of multiple members) 210 Joint housing member (joint housing member, member) 210A Lower joint housing member (joint housing member, member) 210B Upper joint housing member (joint housing member, member) 102, 102L, 102R Outer edge (boundary, dividing boundary) 105, 105L, 105R overlapping section 150, 160, 501, 501A, 601, 601A Connection engagement part (connection means) 151, 161 Engaging parts 152 Engaging claws 152L Locking step (hooking step) 152T Tapered surface (tapered section) 155, 165 Engaged portion 320 Hinge section (hinge) 406 Clamping part 409, 435 First engagement part 409L, 435L hook step section 410 Second engagement part 413 Engaging claw portion 414 Arm section 417 Locking wall section 430 First overlapping section 436 Projection (Second Engaging Part) 437 Second overlapping section 502 Groove 507 Cylindrical member 508 Protrusion 514 Sealing member 603 Third engaging part 607 Fourth engagement part

Claims

1. Insulation material for drain joints, A drain joint comprising a drain joint housed in the aforementioned drain joint insulation member, The aforementioned heat-insulating member for the drain joint is, A joint housing member comprising multiple members that cooperate to form a space inside which the drain joint can be housed, and having divided boundary portions formed at least a part of the boundary between them that separate to form an opening through which the drain joint can pass, A connecting means for detachably connecting the corresponding dividing boundary portions of the aforementioned members, An air layer forming means is disposed inside the joint housing member and forms an air layer between it and the drain joint, The system includes sealing means that suppresses the flow of air between the air layer and the outside, The gap formed inside the joint housing member constitutes the air layer forming means. The ends of the plurality of members connecting the division boundary portions are cylindrical, The aforementioned connecting means is A groove is formed on the outer surface of the ends of the plurality of members that connect the dividing boundary portions, extending in the circumferential direction of the end. A cylindrical member covers the ends of the plurality of members that connect the dividing boundary portions from the radially outer side of the ends, A projection is provided on the inner circumferential surface of the cylindrical member and is capable of engaging with the groove, It has, In the plurality of members connecting the dividing boundary portions, the bottom surface of the groove moves away from the axis as it moves from the end portion along the axis of the plurality of members toward the center. A drain insulation fitting characterized by the following features.

2. Insulation material for drain joints, A drain joint comprising a drain joint housed in the aforementioned drain joint insulation member, The aforementioned heat-insulating member for the drain joint is, A joint housing member comprising multiple members that cooperate to form a space inside which the drain joint can be housed, and having divided boundary portions formed at least a part of the boundary between them that separate to form an opening through which the drain joint can pass, A connecting means for detachably connecting the corresponding dividing boundary portions of the aforementioned members, An air layer forming means is disposed inside the joint housing member and forms an air layer between it and the drain joint, The system includes sealing means that suppresses the flow of air between the air layer and the outside, The gap formed inside the joint housing member constitutes the air layer forming means. The sealing means is It is configured to hold the pipe or hose connected to the drain fitting and to be in close contact with the outer surface of the pipe or hose, In the drain fitting, a flange portion is formed at the end to which the pipe or hose is connected. The aforementioned connecting means is A first engaging portion provided on at least one of the plurality of members, A second engaging portion is provided in addition to the plurality of members and engages with the first engaging portion, It has, The second engaging portion has a locking wall portion provided at a position spaced outward from the other outer surfaces of the plurality of members, The first engagement portion is, An engaging claw portion that can pass between one of the aforementioned plurality of members and the locking wall portion, An arm portion formed on the base end side of the engagement claw portion and connected to at least one of the plurality of members, It has, Between the engaging claw portion and the arm portion, a hooking step is formed as the engaging claw portion protrudes outward from the arm portion. The aforementioned hooking step engages with the locking wall, At least one of the plurality of members is provided with a first overlapping portion that is positioned offset from the arm portion along the dividing boundary portion and in contact with the outer surface of the other of the plurality of members, When connecting the dividing boundary portions of the plurality of members, the first overlapping portion contacts the other outer surface of the plurality of members before the engaging claw portion contacts the locking wall portion. A drain insulation fitting characterized by the following features.

3. Insulation material for drain joints, A drain joint comprising a drain joint housed in the aforementioned drain joint insulation member, The aforementioned heat-insulating member for the drain joint is, A joint housing member comprising multiple members that cooperate to form a space inside which the drain joint can be housed, and having divided boundary portions formed at least a part of the boundary between them that separate to form an opening through which the drain joint can pass, A connecting means for detachably connecting the corresponding dividing boundary portions of the aforementioned members, An air layer forming means is disposed inside the joint housing member and forms an air layer between it and the drain joint, The system includes sealing means that suppresses the flow of air between the air layer and the outside, The gap formed inside the joint housing member constitutes the air layer forming means. The sealing means is It is configured to hold the pipe or hose connected to the drain fitting and to be in close contact with the outer surface of the pipe or hose, In the drain fitting, a flange portion is formed at the end to which the pipe or hose is connected. The aforementioned connecting means is A first engaging portion provided on at least one of the plurality of members, A second engaging portion is provided in addition to the plurality of members and engages with the first engaging portion, It has, The second engaging portion has a locking wall portion provided at a position spaced outward from the other outer surfaces of the plurality of members, The first engagement portion is, An engaging claw portion that can pass between one of the aforementioned plurality of members and the locking wall portion, An arm portion formed on the base end side of the engagement claw portion and connected to at least one of the plurality of members, It has, Between the engaging claw portion and the arm portion, a hooking step is formed as the engaging claw portion protrudes outward from the arm portion. The aforementioned hooking step engages with the locking wall, A clamping portion is provided on at least one of the plurality of members, which clamps the other members together with the arm portion. A drain insulation fitting characterized by the following features.

4. Insulation material for drain joints, A drain joint comprising a drain joint housed in the aforementioned drain joint insulation member, The aforementioned heat-insulating member for the drain joint is, A joint housing member comprising multiple members that cooperate to form a space inside which the drain joint can be housed, and having divided boundary portions formed at least a part of the boundary between them that separate to form an opening through which the drain joint can pass, A connecting means for detachably connecting the corresponding dividing boundary portions of the aforementioned members, An air layer forming means is disposed inside the joint housing member and forms an air layer between it and the drain joint, The system includes sealing means that suppresses the flow of air between the air layer and the outside, The gap formed inside the joint housing member constitutes the air layer forming means. The sealing means is It is configured to hold the pipe or hose connected to the drain fitting and to be in close contact with the outer surface of the pipe or hose, In the drain fitting, a flange portion is formed at the end to which the pipe or hose is connected. The aforementioned connecting means is A first engaging portion provided on at least one of the plurality of members, A second engaging portion is provided in addition to the plurality of members and engages with the first engaging portion, It has, The second engaging portion is a projection provided on the outer surface of one of the plurality of members, The first engagement portion is, Engaging claw portion, An arm portion formed on the base end side of the engagement claw portion and connected to at least one of the plurality of members, It has, Between the engaging claw portion and the arm portion, a hooking step is formed as the engaging claw portion protrudes inward from the arm portion. The aforementioned hooking step engages with the aforementioned projection. A drain insulation fitting characterized by the following features.

5. Insulation material for drain joints, A drain joint comprising a drain joint housed in the aforementioned drain joint insulation member, The aforementioned heat-insulating member for the drain joint is, A joint housing member comprising multiple members that cooperate to form a space inside which the drain joint can be housed, and having divided boundary portions formed at least a part of the boundary between them that separate to form an opening through which the drain joint can pass, A connecting means for detachably connecting the corresponding dividing boundary portions of the aforementioned members, An air layer forming means is disposed inside the joint housing member and forms an air layer between it and the drain joint, The system includes sealing means that suppresses the flow of air between the air layer and the outside, The gap formed inside the joint housing member constitutes the air layer forming means. The sealing means is It is configured to hold the pipe or hose connected to the drain fitting and to be in close contact with the outer surface of the pipe or hose, In the drain fitting, a flange portion is formed at the end to which the pipe or hose is connected. The ends of the plurality of members connecting the division boundary portions are cylindrical, The aforementioned connecting means is A groove is formed on the outer surface of the ends of the plurality of members that connect the dividing boundary portions, extending in the circumferential direction of the end. A cylindrical member covers the ends of the plurality of members that connect the dividing boundary portions from the radially outer side of the ends, A projection is provided on the inner circumferential surface of the cylindrical member and is capable of engaging with the groove, It has, In the plurality of members connecting the dividing boundary portions, the bottom surface of the groove moves away from the axis as it moves from the end portion along the axis of the plurality of members toward the center. A drain insulation fitting characterized by the following features.

6. Insulation material for drain joints, A drain joint comprising a drain joint housed in the aforementioned drain joint insulation member, The aforementioned heat-insulating member for the drain joint is, A joint housing member comprising multiple members that cooperate to form a space inside which the drain joint can be housed, and having divided boundary portions formed at least a part of the boundary between them that separate to form an opening through which the drain joint can pass, A connecting means for detachably connecting the corresponding dividing boundary portions of the aforementioned members, An air layer forming means is disposed inside the joint housing member and forms an air layer between it and the drain joint, The system includes sealing means that suppresses the flow of air between the air layer and the outside, The gap formed inside the joint housing member constitutes the air layer forming means. The sealing means is It is configured to hold the pipe or hose connected to the drain fitting and to be in close contact with the outer surface of the pipe or hose, In the drain fitting, a flange portion is formed at the end to which the pipe or hose is connected. The ends of the plurality of members connecting the division boundary portions are cylindrical, The aforementioned connecting means is A third engaging portion provided on at least one of the plurality of members, A cylindrical member covers the ends of the plurality of members that connect the dividing boundary portions from the radially outer side of the ends, A fourth engaging portion is provided on the cylindrical member and is capable of engaging with the third engaging portion in the axial direction of the plurality of members that connect the dividing boundary portions, It has, The aforementioned cylindrical member is At the end of the joint housing member at a position spaced apart from the drain joint, the outer surface of the joint housing member is covered from the radially outer side, spanning the dividing boundary, and the side wall having the fourth engaging portion formed on its inner surface, A bottom wall is formed in an annular shape that protrudes radially inward from the side wall and spans the outer circumferential surface of the joint housing member across the dividing boundary, has A drain insulation fitting characterized by the following features.

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