JPS6312217B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a drain drainage device used in an air conditioner.

Conventional configuration and its problems Figures 1 to 4 show the conventionally known drain pipe fastening structure of this type of air conditioner.
This will be explained using figures.

As shown in FIG. 1, the air conditioner 1 is provided with a drain pipe 3 on the periphery of the base pan 2 for discharging drain and rainwater to the outside of the device.

Conventionally, the metal drain pipe 3 was used as the base pan 2.
After the pipe was inserted into the opening flange 4 of the pipe and held by a mandrel 9 and a die 10, the end of the pipe was pressurized and curled using the circular arc portion 8 of the punch 7 to be fastened to the flange 4.

However, in the conventional structure, the end of the drain pipe 3 was simply curled to the flange 4 and fastened only in one direction, so it was weak against pressing force in the direction of arrow A. In addition, since the die 10 has a protrusion 11 that holds the pipe, a gap 6 is created between the rising edge of the flange 4 and the boundary between the drain pipe 3, which gives a poor appearance, tends to accumulate foreign matter in that area, and causes rust to progress inside. It was easy. Further, the protrusion 11 of the die 10 has a large abrasion and maintenance of the mold is troublesome.

Purpose of the Invention The present invention is intended to solve the above conventional problems, and aims to improve the fastening force of the drain pipe, the appearance of the drain drainage device, the rust prevention ability, and the maintenance of molds. .

Structure of the Invention In order to achieve this object, the present invention provides a clamping structure in which the base pan flange portion and the drain pipe are connected not only by curling at the end of the drain pipe but also by having a fastening portion on the opposite side of the flange portion. With this configuration, the tightening force of the drain pipe can be improved.

DESCRIPTION OF EMBODIMENTS The present invention will be described below with reference to FIG. 5 showing one embodiment thereof. Here, the configuration of the base pan 2 of the air conditioner is the same as shown in FIGS. 1 and 2, and only the configuration of the drain pipe 3 and the mold used for processing are different, so it is the same as the conventional example. The same numbers will be given to the same parts, and the explanation will be omitted.

In FIG. 5, 5 is a curled portion of the drain pipe 3 and is fastened to the flange 4 of the base 2. 1
2 is a protruding portion of the drain pipe 3, and the curled portion 5
Together, they form a structure for fastening and holding the flange 4.

The mold used for this fastening process is a die 1 having an arc-shaped opening 15 that holds the drain pipe 3.
4, a mandrel 9 for preventing compression and buckling of the drain pipe 3, and a punch 7 for curling the end of the drain pipe 3.

In the above configuration, the punch 7 is connected to the drain pipe 3
When the end of the drain pipe 3 is inserted and pressurized, the end of the drain pipe 3 is curled by the arc portion 8 of the punch 7 and fastened to the flange 4 of the base pan 2. At the same time, the drain pipe 3 is compressed by the pressing force of the punch 7, and the opening 15 of the die 14 has an arc shape. The water flows into the flange 4 of the drain pan 2 and forms a protrusion 12.

Therefore, since the drain pipe 3 holds the flange 4 from both sides, compared to the conventional configuration,
The fastening force is significantly improved and mold maintenance becomes easier.

Effects of the Invention As is clear from the above embodiments, the drain drainage device for an air conditioner of the present invention has a structure in which the drain pipe is held between both sides of the flange of the base pan by the curled portion and the protrusion, so that the fastening force is reduced. At the same time, the contact area between the drain pipe and the base pan increases, which improves sealing performance and eliminates any water leakage in actual use. Also, since the protrusion eliminates the triangular gap on the back side of the drain pipe, rust prevention is also improved.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a drain drainage device for an air conditioner, Figure 2 is a perspective view of the main parts of the same device, Figure 3 is a sectional view of a conventional drain drainage device before fastening, and Figure 4 is a perspective view of the same drain. FIG. 5 is a sectional view of a main part of a drain drainage device for an air conditioner showing an embodiment of the present invention. 2... Base pan, 3... Drain pipe, 4...
...Flange, 5...Curl portion, 12...Protrusion portion.

Claims (1)

[Claims] 1. Provide an opening with a flange on the periphery of the base pan, insert a drain pipe into the flange of this opening, curl the insertion end of the drain pipe, buckle a part of the drain pipe, and attach it to the back surface of the base pan. Air conditioner drain drainage device with protrusions.