JPH051452Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement of a substantially L-shaped hot water introduction pipe of a heater core used in an air conditioner for an automobile.

[Conventional technology]

Conventionally, as this type of hot water introduction pipe for a heater core, the one disclosed in, for example, Japanese Utility Model Application Publication No. 53-70461 is known.

This will be explained based on FIG. In the figure,
Reference numeral 1 denotes a hot water introduction pipe bent into an approximately L-shape, which includes a hose attachment part 2 for attaching a hose 13 connected to the engine side, and a flow rate adjustment valve mechanism 8, and is connected to a tank 12.
A tank mounting portion 3 attached to the tank mounting portion 3 is connected to the tank mounting portion 3 by a screw 6 and a nut 7 via flanges 4 and 5 provided respectively.

The flow rate regulating valve mechanism 8 is composed of a packing 9 provided on the inner circumferential surface of the tank mounting portion 3, a valve shaft 10 passing through the tank mounting portion 3, and a valve plate 11 attached to the valve shaft 10. By rotating the valve shaft 10, a valve plate 11 adjusts the flow rate of hot water flowing through the hot water introduction pipe 1.

[Problem that the invention attempts to solve]

As described above, this type of hot water conduit 1 has a substantially L-shape, so a welding jig cannot be inserted when welding the valve plate 11 to the valve stem 10. For this purpose, the hot water introduction pipe 1 was divided into a hose attachment part 2 and a tank attachment part 3, and after welding a valve plate 11 to the tank attachment part 3, the hose attachment part 2 and the tank attachment part 3 were combined. .

However, this mounting structure has the following problems. That is, there are many installation steps, the number of parts such as screws increases, and the cost becomes high. Separate molds are required for the hose attachment part and the tank attachment part. Space is required for screwing, which increases the size. If reinforcing ribs are provided on the hose attachment portion and the tank attachment portion in order to provide mechanical strength, the portions to be screwed will move outward, resulting in further increase in size.
Therefore, when used in an air conditioner for an automobile, in which engine vibrations and running vibrations are input through a hose, the size of the air conditioner becomes increasingly large, which is undesirable.

[Purpose of invention]

The present invention was devised to solve these conventional problems, and its purpose is to integrate the hose attachment part and the tank attachment part, and to make it possible to weld the valve plate for use in air conditioners. The object of the present invention is to provide a structure for a hot water introduction pipe in a heater core.

[Means for solving problems]

The structure of the hot water introduction pipe in the heater core for an air conditioner according to the present invention is that it is bent into a substantially L-shape and has a packing inside it, and a valve that comes into contact with the packing to control the hot water flow rate. The valve plate is welded to the valve stem in a hot water introduction pipe that is attached to the tank of the heater core for an air conditioner by disposing the plate rotatably and passing through the valve stem that supports the valve plate. , a window hole is provided above the welding part through which a welding tool is inserted and a sealing member is attached.

[Effect of invention]

In the present invention, when the valve plate is welded to the valve stem, a window hole is provided above the welded part, so a welding tool can be inserted using this window hole. When welding is finished, the welding tool is taken out through this window hole, and then a sealing member is attached to this window hole to close it.

In this way, even if the hot water inlet pipe is bent into a substantially L-shape, the valve plate can be welded to the valve stem without having to divide it into two pieces.

[Example of idea]

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

Fig. 1 is a cross-sectional view showing the valve plate in an embodiment of the present invention when welded, Fig. 2 is a cross-sectional view showing a sealing member provided in the window hole after welding, and Fig. 3
The figure is a side view thereof.

In the figure, 20 is a roughly L-shaped hot water introduction pipe made of synthetic resin, and has a built-in hose attachment part 21 for attaching a hose connected to the water jacket of an automobile engine, and a flow rate adjustment valve mechanism 30. A tank attachment portion 22 that is attached to the tank 41 is integrally formed. A window hole 23 is provided at the boundary between the hose attachment part 21 and the tank attachment part 22 at a position above the flow rate regulating valve mechanism 30. In addition, the hose attachment part 21 and the tank attachment part 2
A reinforcing rib 24 is provided in the vicinity of and on the outer periphery of 2.

The flow rate regulating valve mechanism 30 includes a packing 31 provided on the inner peripheral surface of the tank mounting portion 22 and a packing 31 provided on the inner peripheral surface of the tank mounting portion 22.
2, and a valve plate 33 attached to this valve shaft 32. By rotating the valve shaft 32, the valve plate 3
3 adjusts the flow rate of hot water flowing through the hot water introduction pipe 20.

Next, the operation of this embodiment will be explained.

First, a hot water introduction pipe 20 provided with a window hole 23 is prepared, and a packing 31 is attached to it. Next, the valve plate 33 is inserted from below the tank mounting portion 22, and the valve shaft 32 is passed through it. Then, the valve plate 33 is placed on the valve shaft 32, and a fixing jig 35 is disposed below them.

After the valve plate 33 and valve stem 32 have been set in this way, the welding tip 34 is inserted through the upper window hole 23, contacts the valve plate 33 from above, and connects the valve plate 33 to the valve stem. 32
Weld to.

When welding between the valve plate 33 and the valve stem 32 is completed, the welding tip 34 is pulled out from the window hole 23. Then, a sealing member 25 is attached to this window hole 23 by vibration welding or the like.

The hot water introduction pipe 20 made in this manner is screwed to a mounting portion 42 provided in the upper tank 41 of the heater core 40, as shown in FIGS. 4 and 5, for example.

As described above, according to this embodiment, even if the hot water introduction pipe 20 is made by integrating the hose attachment part 21 and the tank attachment part 22, the valve plate 3
3 to the valve stem 32, a welding tip 34 can be inserted through the window hole 23 provided above these welded parts. Therefore, the hose attachment part 2
1 and the tank attachment part 22 do not need to be separated.
Moreover, since the window hole 23 is closed by the sealing member 25, there is no possibility that it will be a problem when it is attached to the heater core 40 and used. Furthermore, since the hose attachment part 21 and the tank attachment part 22 can be provided with arbitrary reinforcing ribs 24 on their outer peripheries, desired mechanical strength can be imparted to them. Also, hose attachment part 2
1 and the tank mounting part 22 are integrally molded, so there is no need to screw them together as in the conventional method, which significantly improves assembly work efficiency, reduces costs, and requires only one mold. This has the advantages of eliminating wasted space, making it more compact, and reducing the number of parts.

In the above embodiment, the window hole 23 is provided directly above the valve plate 33, but the window hole 23 is not limited to this, and may be provided at any location as long as the welding tip 34 can be inserted from above the valve plate 33.

[Effect of idea]

As described above, according to the present invention, it is bent into a substantially L-shape, and a packing is arranged inside, and a valve that comes into contact with the packing and controls the flow rate of hot water.
The plate is rotatably arranged, and this valve
In the hot water introduction pipe that passes through the valve stem that supports the plate and is attached to the tank of the heater core for an air conditioner, the valve plate is welded to the valve stem, and a welding tool is inserted above the welded part. Since the structure is provided with a window hole for attaching a sealing member, it is possible to manufacture an integrally molded hot water introduction pipe to which a valve plate can be attached.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the valve plate in an embodiment of the present invention when welded, Fig. 2 is a cross-sectional view showing a sealing member provided in the window hole after welding, and Fig. 3
4 is a plan view of a heater core to which a hot water introduction pipe according to the present embodiment is attached, FIG. 5 is a front view thereof, and FIG. 6 is a sectional view showing a conventional example. 20...Hot water introduction pipe, 21...Hose attachment part,
22...Tank mounting part, 23...Window hole, 24...
Reinforcing rib, 25... Sealing member, 30... Flow rate adjustment valve mechanism, 31... Packing, 32... Valve shaft,
33... Valve plate, 34... Welding tip.

Claims (1)

[Scope of utility model registration request] It is bent into a substantially L-shape, has a packing inside, and has a rotatably arranged valve plate that comes into contact with the packing to control the flow rate of hot water, and a valve shaft that supports the valve plate. In the hot water introduction pipe that is attached to the tank of the heater core for an air conditioner, the valve plate is welded to the valve stem, and a welding tool is inserted above the welded part, and a window hole is used to attach the sealing member. A structure of a hot water introduction pipe in a heater core for an air conditioner, characterized in that it is provided with.