JPS625364Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a device for sealing the portion where the inlet/outlet pipe of a heater core penetrates the car body wall in an automobile air conditioner, and is particularly used in an automobile air conditioner having a hot water heating device. It is.

In this type of automotive air conditioner, the heater core's inlet/outlet pipe penetrates the vehicle body wall that separates the vehicle interior and the exterior (engine room), and is connected to a connection hose from the driving engine located outside the vehicle to create a hot water circuit. It consists of Therefore, in the penetrating part of the above-mentioned entrance/exit pipe, there is a gap between the entrance/exit pipe and the vehicle body wall.
A sealing device is required to prevent air leakage from the gap, and a specific example of a conventional sealing device is shown in FIGS. 1 and 2.

1 and 2, the heater core 1 is housed in an air conditioning case 2, and the inlet and outlet pipes 3a and 3b of the heater core 1 penetrate through pipe insertion holes 5a and 5b formed in the vehicle body wall 4, and the inlet and outlet pipes 3a and 3b of the heater core 1 pass through pipe insertion holes 5a and 5b formed in the vehicle body wall 4, so that the heater core 1 is housed in an air conditioning case 2. It is connected to connection hoses 12a and 12b. The inlet/outlet pipes 3a, 3b are supported by grooves 7a, 7b of a support plate 6 provided in the air conditioning case 2,
A washer plate 13 and a seal member 9 are interposed between the support plate 6 and the vehicle body wall 4,
The space between the inlet/outlet pipes 3a, 3b and the vehicle body wall 4 is sealed.

However, in the conventional sealing device configured in this way, the inlet/outlet pipes 3a, 3b are only fixed to the heater core 1 at one end in the longitudinal direction, and furthermore, the fixed portions are bent. Therefore, the inlet/outlet pipes 3a, 3
b had the disadvantage of being weak against forces applied in its longitudinal direction. Especially when replacing connection hoses 12a and 12b that have been used for many years,
The elasticity of the connection hoses 12a, 12b has deteriorated, and the connection hoses 12a, 12b have deteriorated due to the action of antifreeze, etc. flowing through the connection hoses 12a, 12b.
Since the inlet/outlet pipes 3a, 3b are adhered to each other very firmly, a large force is applied to pull out the connecting hoses 12a, 12b, which may cause damage to the inlet/outlet pipes 3a, 3b.

The purpose of this invention is to eliminate the lack of strength of the inlet and outlet pipes in the sealing device portion, which is caused by the inlet and outlet pipes being fixed at only one end, as described above, and to reinforce the inlet and outlet pipes. However, the gist of the present invention is that a pair of inlet/outlet pipes 3a are provided on one end side.
In the air conditioning case 2 in which the heater core 1 having the heater core 3b is housed, a support plate 6 protruding from the outer end thereof is provided, and an inlet/outlet pipe 3a,
3b is provided with a fixing plate 8 that connects the two, and the fixing plate 8 is disposed on the same plane as the support plate 6 or so as to overlap with the support plate 6, and the support and fixation plates 6, 8 close the entrance/exit. A pipe penetrating part sealing device for an automobile air conditioner is characterized in that an externally fitted sealing material 9 is pressed onto 3a and 3b. Therefore,
Since the inlet/outlet pipes are fixed to each other by the fixing plate provided integrally with the support plate, and the fixing plate is in contact with the sealing member, the force applied to the inlet/outlet pipe is transferred through the fixing plate. Therefore, the inlet and outlet pipes can be reinforced.

Examples of this invention will be described below with reference to the drawings.

In FIG. 3, a first embodiment of this invention is shown, in which a heater core 1 is housed in an air conditioning case 2 arranged in a vehicle interior, and a tank 1a of the heater core 1 protrudes from the air conditioning case 1. One ends of inlet/outlet pipes 3a, 3b, which will be described below, are connected and fixed.

The inlet/outlet pipes 3a, 3b are made of synthetic resin together with the tank 1a, and the other end thereof is a pipe insertion hole 5a formed in the vehicle body wall 4 that separates the passenger compartment from the outside of the vehicle.
5b, and protrudes outside the vehicle through the vehicle body wall 4, and a connection hose from a driving engine (not shown) is connected to the other ends of the inlet/outlet pipes 3a, 3b.

A support plate 6 is provided at the outer end of the air conditioning case 2.
are provided parallel to the vehicle body wall 4, and this support plate 6 has semicircular notches 7a, 7b formed corresponding to the inlet/outlet pipes 3a, 3b. The inlet/outlet pipes 3a, 3b are fitted into the inlet/outlet pipes 3a, 3b, and are supported so as to have an effect against load movement in the radial direction.

The fixed plate 8 is formed integrally with the inlet/outlet pipes 3a, 3b, connects the inlet/outlet pipes 3a, 3b to each other, and is provided at a symmetrical position on the same plane as the support plate 6. A gap of, for example, about 1 to 1.5 mm is formed between the opposite ends of the fixing plate 8 and the supporting plate 6 to allow for slight assembly errors that may occur during assembly work. .

The seal member 9 is made of an elastic material such as rubber, and is sandwiched between the support plate 6, the fixing plate 8, and the vehicle body wall 4, and the inlet/outlet pipes 3a, 3 are inserted into the seal holes 10a, 10b formed in the seal member 9.
b is inserted so that they are in close contact. Therefore, the gap created between the inlet/outlet pipes 3a, 3b and the pipe insertion holes 5a, 5b of the vehicle body wall 4 is sealed by the sealing member 9 compressed by the compressive force applied from the support plate 6 and the fixed plate 8. This makes it possible to prevent air leakage from the passenger compartment.

In the above configuration, an example of an assembly method will be described. First, the heater core 1 is housed in the air conditioning case 2, and the inlet/outlet pipes 3a and 3b are connected to the air conditioning case 1.
By supporting the support plate 6, the support plate 6 and the fixed plate 8 are positioned symmetrically on the same plane. Next, the seal member 9 is fitted over the inlet/outlet pipes 3a, 3b, and the air conditioning case 2 is attached to the vehicle body so that the tips of the inlet/outlet pipes 3a, 3b are inserted into the pipe insertion holes 5a, 5b of the vehicle body wall 4. And finally, the entrance/exit pipe 3
The process is completed by connecting connection hoses from a driving engine (not shown) to a and 3b.

When inserting or withdrawing the connection hose, a large force is applied in the longitudinal direction of the inlet/outlet pipes 3a, 3b. However, the inlet/outlet pipe 3a,
3b are connected to each other via the fixed plate 8, the force is distributed to both the inlet and outlet pipes 3a and 3b, or is received by the seal member 9 and the vehicle body wall 4 via the fixed plate 8, and the force is applied to the inlet and outlet pipes 3a and 3b. 3
Not much is transmitted to the connection portion between a, 3b and the tank 1a of the heater core 1, so there is no risk of damage to the inlet/outlet pipes 3a, 3b.

In FIG. 4, a second embodiment of this invention is shown, and while in the first embodiment, the support plate 6 and the fixing plate 8 are provided at symmetrical positions on the same plane, this embodiment The difference in this example is that the support plate 6 and the fixing plate 8 are overlapped with each other. Therefore, the inlet/outlet pipes 3a, 3
Since b is fixed by the fixing plate 8 over its entire circumference, the connection becomes stronger and the pressure-receiving area can also be expanded. In this embodiment, instead of the cutouts 7a and 7b of the support plate 6 in the previous embodiment, the support plate 6 is provided with a cutout 7c surrounding the inlet and outlet pipes 3a and 3b.

In FIG. 5, a third embodiment of this invention is shown, and while in the second embodiment, the support plate 6 and the fixing plate 8 are simply superposed, in this embodiment, , a stepped portion 11a on each of the support plate 6 and the fixed plate 8,
11b is formed to provide an engaging structure, and the fixed plate 8 is also supported by the support plate 6. In this third embodiment, the step portions 11a and 11b are formed on both the support plate 6 and the fixed plate 8, but it goes without saying that the engagement structure can be obtained even if the step portions 11a and 11b are formed on only one side. be.

As described above, this invention has the effect that the inlet/outlet pipe can be reinforced in the sealing device portion, but there are other effects as follows.

First, since the fixed plate 8 is formed integrally with the inlet/outlet pipes 3a, 3b, there is no need to provide the washer plate 13 as in the conventional case, and the number of parts can be reduced, leading to cost reduction.

Second, the fixed plate 8 is connected to the inlet and outlet pipes 3a, 3.
Since it is integrally molded with b, the inlet/outlet pipes 3a, 3
The position of the fixing plate 8 with respect to b can be kept constant at all times, so it is possible to eliminate work such as using a spacer during assembly, and the assembly work becomes easier.

[Brief explanation of the drawing]

1 and 2 show a conventional example, FIG. 1 is an exploded perspective view, FIG. 2 is a cross-sectional view, FIG. 3 is an exploded perspective view showing a first embodiment of the present invention, FIG. 4 is a perspective view showing the main part of a second embodiment of the present invention, and FIG.
FIG. 1 is a cross-sectional view showing a third embodiment of the present invention.
3b: inlet/outlet pipe; 4: body wall; 6: support plate; 8: fixing plate; 9: sealing member; 11a, 11b: step portion.

Claims (1)

[Scope of utility model registration request] In an air conditioning case 2 housing a heater core 1 having a pair of inlet/outlet pipes 3a, 3b at one end thereof, a support plate 6 protruding from the outer end thereof is provided, and the inlet/outlet pipes 3a, 3b are provided with:
A fixing plate 8 is provided to connect the two, and the fixing plate 8 is disposed on the same plane as the support plate 6 or superimposed on the support plate 6, and the support and fixation plates 6, 8 close the entrances and exits 3a, 3.
A pipe penetrating portion sealing device for an automobile air conditioner, characterized in that an externally fitted sealing material 9 is pressed at (b).