JPH0113269Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement in the mounting structure of an air vent tube in a heater core provided in an air conditioner for an automobile.

[Conventional technology]

This type of heater core, as shown in Figure 1,
A lower tank 2 is provided on one side of the core body 1, and an outlet pipe 4 and an inlet pipe 9 are provided on the other side.
It has a structure in which an atsupata tank 3 is provided.

However, this heater core has a problem in that air accumulates in the upper part of the heat tank 3, etc., and the function of the heater core deteriorates.

Therefore, conventionally, as shown in FIG. 1, an air vent tube 5 is provided at the outlet pipe 4 of the hot tank 3, and the vent tube 5 that occurs when the cooling water is led out from the outlet pipe 4 causes the hot water tank to drain. The function of the heater core is improved by eliminating the air that collects in the third part.

By the way, the air vent tube 5 can be installed in the Atsupa tank 3 by holding the air vent tube 5 with a clamp 6 as shown in FIG. 2, or by using a U-shaped recess 7 as shown in FIG. Support plate 8
(See, for example, Japanese Utility Model Application Publication No. 58-27680).

[The problem that the idea attempts to solve]

However, if the air bleed tube 5 is only held by the clamp 6 or the support plate 8, the holding of the air bleed tube 5, which is adversely affected by vibration, is not reliable.

Therefore, generally, an insert pin is provided in the upper tank 3, and a push nut is attached to the insert pin to securely attach the air vent tube 5.

However, since all of them are attached at one place, they are still insufficient, and there are also disadvantages in that the attachment becomes complicated, the number of parts increases, and the cost increases.

The present invention has been made in order to eliminate the above-mentioned problems, and it is an object of the present invention to provide a mounting structure for an air bleed tube in a heater core, which allows the air bleed tube to be easily and reliably attached, and also reduces the number of parts and reduces costs. The purpose is to

[Means to solve the problem]

The mounting structure of the air vent tube in the heater core according to the present invention is to provide a support protrusion consisting of two protrusions near the outlet pipe inlet on the inner wall surface of the atspa tank, and to provide a support protrusion consisting of two protrusions along the axial direction of the outlet pipe. A tube mounting groove is provided on the inner wall surface, and an air vent tube having a bead at the tip is attached by engaging the tip with the support protrusion and inserting the center portion of the tube into the tube mounting groove. be.

[Effect]

In the present invention, the air bleed tube can be attached by simply engaging the beaded end with the support protrusion made up of two protrusions and inserting the center part of the tube into the tube attachment groove provided along the pipe hole. can.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 4 shows an embodiment of the mounting structure of the air vent tube in the heater core according to the present invention, and 10 is a hot tank.

This hot tank 10 is integrally provided with an outlet pipe 11. Of course, although not shown, an inlet pipe is also provided integrally with the attenuator tank 10. This hot tank 10 is integrally provided with a support projection 14 consisting of two projections 14a and 14b near the outlet pipe introduction port 13 on the inner wall surface 12 thereof. In addition, as shown in FIGS. 5 and 6, the outlet pipe 11 has a tube mounting groove 16 on the inner wall surface 15 of the outlet pipe 11 with a narrow opening and a curved cross-section that is wide inside along the pipe hole 17. It is provided.

On the other hand, reference numeral 18 denotes an air vent tube formed of an elastic material and attached to the outlet pipe 11 portion, and a bead 20 projecting annularly is provided at the tip end 19. This air vent tube 18 has its distal end 19 having a bead 20 engaged with the support protrusion 14 made up of the two protrusions 14a and 14b, and at the same time, the tube central portion 21 is inserted into the tube mounting groove 16. It is installed in a tilted manner.

Next, the operation of this embodiment will be explained.

According to the heater core according to this embodiment, the bead 2
The tip portion 19 having a diameter of 0 is connected to the two projections 14a,
The air vent tube 18 can be attached by simply engaging the support protrusion 14 consisting of the tube hole 14 and inserting the tube center portion 21 into the tube attachment groove 16 provided along the pipe hole 17.
There is no need for complicated work such as passing the air bleed tube 5 into the U-shaped recess 7 or attaching a push nut to the insert pin, and the installation is easy. Also, air vent tube 1
8 is supported at two places, the support protrusion 14 and the tube mounting groove 16, and the tip 1 of the air vent tube 18
Since the bead 20 provided at 9 is engaged with the support protrusion 14, the air vent tube 18 is sufficiently held, and even if vibrations are applied, it will not come off and can be securely attached. Furthermore, since the support protrusion 14 and the tube mounting groove 16 that hold the air vent tube 18 are provided integrally with the atsupa tank 10, the air vent tube 1
No other special parts are required for attaching the 8, so the number of parts can be reduced, and of course costs can also be reduced.

In the above embodiment, one bead 20 is provided at the tip 19 of the air vent tube 18, but two beads 20 may be provided so as to sandwich the support protrusion 14 therebetween. In this case, the air vent tube 18 can be more securely attached.

[Effect of idea]

As described above, according to the present invention, a support protrusion consisting of two protrusions is provided near the outlet pipe inlet on the inner wall surface of the atspa tank, and a tube mounting groove is provided along the inner wall surface of the outlet pipe. Since the air bleed tube is attached by engaging the tip of the air bleed tube with a bead on the support projection and inserting the center portion of the tube into the tube mounting groove, the air bleed tube can be easily installed. In addition, since the air vent tube is locked by the support protrusion after installation, detachment due to vibration is eliminated, and the number of parts can be reduced to reduce costs.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional heater core. FIG. 2 is a perspective view of main parts showing a conventional air vent tube mounting structure. FIG. 3 is a sectional view of a main part showing a conventional air vent tube mounting structure. FIG. 4 is a partially sectional main part perspective view showing an embodiment of the mounting structure for the air vent tube in the heater core according to the present invention. FIG. 5 is a sectional view taken along line A--A in FIG. 4. FIG. 6 is an enlarged sectional view of a main part of the drain tube shown in FIG. 4, showing a state in which the drain tube is inserted into the tube mounting groove. Explanation of symbols of main parts, 10... Atsupa tank, 11... Outlet pipe, 12, 15...
...Inner wall surface, 13... Outlet pipe inlet,
14...Support protrusion, 16...Tube mounting groove, 1
7...Pipe hole, 18...Drain tube, 19
...Tip, 20...Bead, 21...Central part of the tube.

Claims (1)

[Scope of utility model registration request] A support protrusion consisting of two protrusions is provided near the outlet pipe inlet on the inner wall of the Atsupa tank, a tube mounting groove is provided on the inner wall of the outlet pipe along the axial direction of the outlet pipe, and a bead is provided at the tip. 1. A mounting structure for an air vent tube in a heater core, characterized in that the air vent tube is attached by engaging the distal end of the air vent tube with the support protrusion and inserting the center portion of the tube into the tube mounting groove.