JP2018138820A - Joint - Google Patents

Abstract

The present invention provides a joint capable of preventing a decrease in the heat insulation effect of a drain horizontal pipe at low cost. A hose 3 connected to a drain pipe of an air conditioning indoor unit 22 is connected to a cylindrical pipe 23 having a heat insulating material that guides drain discharged from the air conditioning indoor unit to the outside and is exposed only at an end face. A drain passage for supplying drain introduced from the hose to the tubular pipe, a cylindrical first connection portion provided at one end of the drain passage for connecting the hose, and a drain passage A second connecting portion provided at the other end for connecting the tubular pipe, and the second connecting portion accommodates the end face of the tubular pipe and the outer peripheral surface and the inner peripheral face in the vicinity of the end face over the entire circumference. A groove is provided. An inner cylindrical portion and an outer cylindrical portion that form a groove portion of the second connection portion are provided, and the inner cylindrical portion is provided with a protrusion that protrudes in a direction perpendicular to the outer peripheral surface over the entire outer peripheral surface. Can do. [Selection] Figure 1

Description

  The present invention provides a hose connected to a drain pipe of an air conditioning indoor unit when the drain generated in the air conditioning indoor unit installed indoors is guided to the outside, and the air conditioning outside the room in which the air conditioning indoor unit is installed. The present invention relates to a joint for connecting a cylindrical pipe that guides a drain discharged from an indoor unit.

  FIG. 9 shows an example of a drain-up pipe used when the drain generated in the air conditioning indoor unit installed on the indoor ceiling or the like is led to the outside. The drain-up pipe 21 includes a drain hose joint 25 that connects a drain pipe 22a of the air conditioning indoor unit 22 and a drain horizontal running pipe 23 that guides the drain discharged from the drain pipe 22a to the outside, and an air conditioning indoor unit. It is attached to the suspension part 27 for suspending 22 to a ceiling part (not shown), and is comprised with the suspension part 26 which suspends the drain hose coupling 25 (refer patent document 1). In the drain-up pipe 21, each member is covered with a heat insulating material or made of a material containing a heat insulating material in order to prevent adhesion and dropping of water droplets.

  As an example of the heat insulation construction, as shown in FIG. 10 and FIG. 11, a drain horizontal running tube 23 (only the portion extending upward is shown) containing the heat insulating material 28 is connected to the drain hose joint 25. Yes. In FIG. 10, a joint 25a of the drain hose joint 25 is provided with an enlarged diameter portion 25b, and the enlarged diameter portion 25b accommodates the upper end portion 23a of the drain horizontal running pipe 23, and the enlarged diameter portion 25b and the upper end portion 23a are in contact with each other. The surfaces are joined with an adhesive. On the other hand, in FIG. 11, an adapter 30 having a diameter smaller than that of the drain horizontal pipe 23 is used, and the abutting portion between the adapter 30 and the drain horizontal pipe 23 and the joint 25c and the joint surface 31 of the drain horizontal pipe 23 and the joint 25c are shown. Bonded with adhesive.

Utility Model Registration No. 3150922

  As shown in FIGS. 10 and 11, the heat insulating material 28 of the drain horizontal running pipe 23 is provided over the entire drain horizontal running pipe 23 and exposed at the upper end surface 23 b. Therefore, as shown in FIG. 10, when the drain horizontal pipe 23 and the joint 25 a are connected, when the adhesive that joins both is peeled off, the drain enters the contact portion 29 and the heat insulating material 28 absorbs moisture, There was a possibility that the heat insulation effect might fall.

  On the other hand, when the drain transverse pipe 23 and the joint 25c are connected via the adapter 30 as shown in FIG. 11, the joint surface 31 of both is protected by the adapter 30, so that the heat insulating material 28 comes into contact with the drain. Although it becomes difficult and it is possible to prevent the heat insulating material 28 from absorbing moisture, there is a problem that the cost increases due to the provision of the adapter 30.

  Then, an object of this invention is to provide the coupling which can prevent the fall of the heat insulation effect of a drain horizontal running pipe at low cost.

  In order to achieve the above object, the present invention is directed to a hose connected to a drain pipe of an air conditioning indoor unit, a drain discharged from the air conditioning indoor unit outside a room in which the air conditioning indoor unit is installed, and an end surface. It is a joint for connecting a tubular pipe having a heat insulating material exposed only, a drain passage for supplying drain introduced from the hose to the tubular pipe, and provided at one end of the drain passage, A cylindrical first connecting portion for connecting a hose, and a second connecting portion provided at the other end of the drain passage for connecting the cylindrical pipe, wherein the second connecting portion is A groove portion is provided that accommodates the end surface of the tubular pipe and the outer peripheral surface and the inner peripheral surface in the vicinity of the end surface over the entire periphery.

  According to the present invention, by providing the groove portion that accommodates the end portion of the tubular pipe (drain lateral running pipe), it is possible to prevent the drain from entering the contact portion between the joint and the tubular pipe. Since the contact between the heat insulating material and the drain can be prevented, it is possible to prevent a decrease in the heat insulating effect of the cylindrical pipe. Moreover, when connecting a joint and cylindrical piping, since it is not necessary to use members like the above-mentioned adapter separately, manufacturing cost and work cost can be held down.

  The joint includes an inner cylindrical portion and an outer cylindrical portion that form the groove portion of the second connection portion, and the inner cylindrical portion is perpendicular to the outer circumferential surface over the entire circumference of the outer circumferential surface. A ridge protruding in the direction can be provided. Contact between the heat insulating material and the drain can be more effectively prevented by the protrusions coming into close contact with the end surface of the tubular pipe.

  Further, the outer cylindrical portion is extended in the drain flow direction of the drain passage more than the inner cylindrical portion, and the extended portion of the outer cylindrical portion extends to the inner peripheral surface over the entire circumference of the inner peripheral surface. A protrusion that protrudes in a direction perpendicular to the inner peripheral surface can be provided. Since the protrusions are in close contact with the end surface of the tubular pipe, the contact between the heat insulating material and the drain can be more effectively prevented.

  Further, the outer peripheral surface is in a direction perpendicular to the outer peripheral surface at a position on the outer peripheral surface of the extended portion of the outer cylindrical portion and facing the ridge formed on the inner peripheral surface of the outer cylindrical portion. It is possible to provide a tightening member for tightening. Thereby, the extension part of an outside cylindrical part adheres to the end part surface of cylindrical piping with the above-mentioned ridge, and contact with a heat insulating material and drain can be prevented still more effectively.

  Further, by providing an adhesive for adhering the surface of the groove portion of the second connection portion to the end surface of the cylindrical pipe and the outer peripheral surface and the inner peripheral surface in the vicinity of the end surface, the heat insulating effect of the cylindrical pipe Can be more effectively avoided.

  Furthermore, the connection part 2 and the boundary part of the connection part 2 and the connection part 4 can be reinforced by providing the cylindrical member which contact | abuts to the internal peripheral surface of the said 1st connection part and the said 2nd connection part.

  As described above, according to the present invention, it is possible to provide a joint capable of preventing a decrease in the heat insulation effect of the drain transverse pipe at low cost.

It is the schematic which shows an example of drain up piping provided with the coupling which concerns on this invention. It is sectional drawing which shows the coupling of FIG. 1, and a drain horizontal running pipe. It is sectional drawing which shows the coupling of FIG. It is an expansion perspective view which shows the cylindrical member of the coupling of FIG. It is a photograph which shows the state which applied the water leak detection ink to the cylindrical piping before performing a water leak test. It is a photograph which shows the state which connected the tubular piping which applied the water leak detection ink to the joint which concerns on this invention before performing a water leak test. It is a photograph which shows the state which is performing the water leak test. It is a photograph which shows the state after performing a water leak test. It is the schematic which shows an example of the conventional drain up piping. It is a schematic sectional drawing which shows the example of a connection of the coupling shown in FIG. 9, and a drain horizontal running pipe. It is a schematic sectional drawing which shows another example of a connection of the coupling shown in FIG. 9, and a drain horizontal running pipe.

  Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a drain-up pipe provided with a joint according to the present invention, and this drain-up pipe 10 is similar to the conventional drain-up pipe 21 shown in FIG. A drain horizontal running pipe (hereinafter referred to as “cylindrical pipe”) 23 for guiding the drain discharged from 22a to the outside, and a suspension part 27 for hanging the air conditioning indoor unit 22 on a ceiling (not shown). And a joint 1 for connecting the drain pipe 22a and the tubular pipe 23 via the hose 3 in place of the drain hose joint 25.

  The joint 1 is made of soft vinyl chloride or the like, and as shown in FIGS. 2 and 3, a drain passage 1 a for supplying drain introduced from the hose 3 to the tubular pipe 23, and an air conditioning indoor unit 22 at one end. A connecting portion (first connecting portion) 2 for connecting the hose 3 connected to the drain pipe 22a, and a connecting portion (second connecting portion) 4 for connecting to the tubular pipe 23 at the other end, A reinforcing cylindrical member 5 is provided inside the connecting portion 2 and the connecting portion 4.

  The connecting portion 4 has an inner cylindrical portion 4a and an outer cylindrical portion 4b, and the outer peripheral surface and inner periphery of the upper end portion 23a including the upper end surface 23b of the cylindrical pipe 23 by these two cylindrical portions 4a and 4b. A groove 4c that accommodates the entire surface is formed. Thereby, the heat insulating material 28 exposed in the upper end surface 23b of the cylindrical pipe | tube 23 and the contact of the drain which flows through the inside of the drain channel | path 1a can be prevented.

  Here, the cylindrical portion 4b is extended in the axial direction (drain flow direction) of the drain passage 1a from the cylindrical portion 4a, and the entire circumference of the cylindrical portion 4b is formed on the inner surface of the extended portion 4d of the cylindrical portion 4b. Two protruding ridges 4e, 4f (shown only in FIG. 3) can be provided. Since these protrusions 4e and 4f are in close contact with the outer peripheral surface of the tubular pipe 23, the contact between the heat insulating material 28 and the drain can be more effectively prevented.

  Further, a concave portion 4g is provided on the outer surface of the extended portion 4d of the cylindrical portion 4b and at a position facing the protrusions 4e and 4f, and a binding band (clamping member) 6 made of stainless steel or the like is provided in the concave portion 4g. Thus, together with the protrusions 4e and 4f, the inner peripheral surface of the extended portion 4d is brought into close contact with the outer peripheral surface of the tubular pipe 23, and the contact between the heat insulating material 28 and the drain can be further effectively prevented.

  On the other hand, three protrusions 4h-4j (shown only in FIG. 3) projecting over the entire circumference on the cylindrical portion 4b side can be provided on the outer surface of the cylindrical portion 4a. Since these protrusions 4h-4j are in close contact with the inner peripheral surface of the cylindrical pipe 23, the contact between the heat insulating material 28 and the drain can be more effectively prevented.

  The cylindrical member 5 is formed of resin or the like, and is attached from the opening end of the connection portion 2 to the inside of the opening end of the cylindrical portion 4a of the connection portion 4. As shown in FIG. 4, the cylindrical member 5 includes a plurality of concave portions 5 b in a cylindrical base portion 5 a, and the cylindrical member 5 is simply press-fitted into the inside from the opening end of the connecting portion 2. The inner surface enters the recess 5b and the cylindrical member 5 is fixed. Therefore, no adhesive is necessary.

  It is also possible to form the cylindrical member 5 with a stainless steel pipe, but in that case, it is necessary to cut a long stainless steel tube to a predetermined size, and it is necessary to perform cutting and deburring work, and further to the connecting portion Adhesive is required when mounting the inside of 2. In the case of a resin or the like, not only an adhesive is not necessary as described above, but it is only necessary to mold using a mold, and the manufacturing cost can be greatly reduced.

  By attaching the cylindrical member 5, it is possible to reinforce the connecting portion 2 and the boundary portion between the connecting portion 2 and the connecting portion 4, and sufficiently withstand the case where the lower end portion of the hose 3 is bent in FIG. be able to.

  As described above, according to the present invention, it is possible to effectively prevent the heat insulating material 28 of the tubular pipe 23 from coming into contact with the drain by the groove 4c or the like without using the conventional adapter 30 (see FIG. 11). Therefore, it is possible to prevent the heat insulation effect of the tubular pipe from being lowered at a low cost.

  In addition, the above is only one embodiment of the joint according to the present invention, and the gist of the present invention is provided as long as it includes the groove portion 4c that accommodates the upper end portion 23a including the upper end surface 23b of the tubular pipe 23. Various modifications and applications are possible without departing from the scope of the present invention. For example, the upper end portion 23a of the cylindrical pipe 23 and the groove portion 4c of the connection portion 4 may be bonded using an adhesive, the shape of the cylindrical portions 4a and 4b, the presence or absence of the protrusions 4e, 4f, 4h-4j, The shape, the number thereof, the presence / absence of the cylindrical member 5 and the binding band 6, the installation position, and the like can be changed as appropriate.

  Next, test examples of the present invention will be described with reference to FIGS. In each figure, Example 1, Example 2, and Comparative Example are displayed side by side, and the submergence time is about 45 hours.

  First, a comparative example will be described. As shown in FIG. 5 and FIG. 6, a leak detection ink that drops in color when wet is applied to the upper surface of the cylindrical pipe 23 (see FIG. 2), and the leak detection ink is applied as shown in FIG. The lower part of the non-cylindrical pipe 23 was submerged. As a result, as shown in FIG. 8, the color of the water leakage detection ink applied to the upper surface of the cylindrical pipe 23 drops, and water flows from the lower surface of the cylindrical pipe 23 to the upper surface via the heat insulating material 28 (see FIG. 2). It can be seen that it has penetrated.

  Next, Example 1 will be described. The joint 1 and the cylindrical pipe 23 shown in FIG. 2 are prepared, and as shown in FIG. 5, the water leakage detection ink is applied to the end face of the cylindrical pipe 23, and the water leakage detection of the cylindrical pipe 23 is shown in FIG. The side to which the ink was applied and the joint 1 were connected, and the connection part between the joint 1 and the tubular pipe 23 was submerged as shown in FIG. Thereafter, when the tubular pipe 23 was removed from the joint 1, as shown in FIG. 8, the color of the water leakage detection ink applied to the end face of the tubular pipe 23 did not fade, and the connection portion between the joint 1 and the tubular pipe 23. There was no water leakage.

  Finally, Example 2 will be described. Embodiments in which the shape of the protrusions 4h-4i of the inner cylindrical portion 4a of the joint 1 shown in FIGS. 2 and 3 is changed to a non-rounded V shape (not shown) and a cylindrical pipe 23 are prepared. A water leakage test was conducted in the same manner as in Fig. 1 (see Fig. 5-7). After that, when the tubular pipe 23 was removed from the joint, as shown in FIG. 8, the color of the water leak detection ink applied to the end face of the tubular pipe 23 did not fade, and the water leaked at the connection portion between the joint and the tubular pipe 23. Was not recognized. Thereby, it turned out that the shape of the protrusion 4h-4i of the inner cylindrical part 4a has the same effect in both the rounded R type of Example 1 and the V type of the present example.

DESCRIPTION OF SYMBOLS 1 Joint 1a Drain channel | path 2 Connection part 3 Hose 4 Connection part 4a, 4b Tubular part 4c Groove part 4d Extension part 4e, 4f Projection 4g Recess 4h-4j Projection 5 Cylindrical member 5a Base 5b Recess 6 Binding band 10 Drain up Plumbing

Claims (6)

A hose connected to the drain pipe of the air conditioning indoor unit, a cylindrical pipe having a heat insulating material that guides the drain discharged from the air conditioning indoor unit to the outside of the room in which the air conditioning indoor unit is installed and is exposed only at the end face A joint for connecting
A drain passage for supplying drain introduced from the hose to the cylindrical pipe;
A cylindrical first connecting portion provided at one end of the drain passage for connecting the hose;
Provided at the other end of the drain passage, and a second connection part for connecting the cylindrical pipe,
The second connection portion includes a groove portion that accommodates the end surface of the tubular pipe and the outer peripheral surface and the inner peripheral surface in the vicinity of the end surface over the entire circumference. An inner cylindrical portion and an outer cylindrical portion forming the groove portion of the second connection portion,
2. The joint according to claim 1, wherein the inner cylindrical portion includes a protrusion that protrudes in a direction perpendicular to the outer circumferential surface over the entire circumference of the outer circumferential surface. The outer cylindrical portion is extended in the drain flow direction of the drain passage more than the inner cylindrical portion;
3. The joint according to claim 2, wherein the extended portion of the outer cylindrical portion includes a protrusion that protrudes in a direction perpendicular to the inner peripheral surface over the entire circumference of the inner peripheral surface.   The outer peripheral surface is fastened in a direction perpendicular to the outer peripheral surface at a position on the outer peripheral surface of the extended portion of the outer cylindrical portion and facing the protrusion formed on the inner peripheral surface of the outer cylindrical portion. 4. The joint according to claim 3, wherein a fastening member is provided.   The adhesive for bonding the surface of the groove part of the said 2nd connection part, the outer peripheral surface of the end surface of the said cylindrical piping, and the vicinity of this end surface, and an internal peripheral surface is provided. A joint according to any one of the above.   The joint according to any one of claims 1 to 5, further comprising a cylindrical member that comes into contact with inner peripheral surfaces of the first connection portion and the second connection portion.