JPH01244914A - Fluid passage - Google Patents

Abstract

PURPOSE:To surely prevent each packing from its exfoliation by opening a through hole to a passage main unit in its connection end part while connecting the packing respectively to both inner and outer surfaces of the connection end part and connecting each packing to each other through the through hole. CONSTITUTION:A blower casing 200 houses a blower 201 in the inside, serving as the first passage means, and the blower casing 200 connects its one end to one end of a duct 400 serving as the second passage means. While the duct 400 connects its another end to a heater casing 300 which houses a heater core 301 in the inside and serves as the first passage means. Many through holes 400b are opened to aconnection end part 400a of the duct 400, while each of the first and second packings 501, 502, coating the through holes 400b, is connected respectively to an external surface 41 and an internal surface 42 of the connection end part 400a. Thus firmly connecting the packings 501, 502 to each other through the through hole, each packing 501, 502 is surely prevented from its exfoliation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to fluid passages, and more particularly to a connection structure between a blower casing, a heater casing, a duct, etc. in an automotive air conditioner.

[Prior Art] Conventionally, in order to maintain a seal at the mating connection ends of the blower casing, heater casing, duct, etc., adhesive or adhesive is applied to the mating connection ends of each casing or duct. A sealing gasket was attached using tape or the like, and this gasket was interposed between the two fitting connection ends.

However, casings, ducts, etc. are often made of polypropylene, and this polypropylene has poor bonding strength with adhesives, tapes, etc., and the sealing gasket easily peels off. Therefore, if the sealing gasket does not join securely or peels off, the gasket may shift when connecting the fitting connection ends of the casing and duct, making it difficult to connect, or may cause poor assembly, resulting in airflow. etc. will occur.

After assembly, when the gasket peels off and the air conditioner is activated, and the air passing through the device comes into contact with the gasket, it can cause abnormal noises caused by the contact between the air and the gasket, and abnormal noises caused by disturbances in the airflow. . Additionally, there is a problem that the packing may peel off due to air.

[Problems to be Solved by the Invention] In order to solve the above-mentioned problems, the present invention aims to reliably fix a packing to a fitting connection end of a casing or a duct.

[Means for Solving the Problem] In the present invention, in a fluid passage formed by connecting the first passage means and the second passage means, an outer surface wall is provided at the fitting connection end of the second passage means with the first passage means. A through hole is formed that penetrates from the center toward the inner surface wall.

Then, the first packing and the second packing are joined to the outer surface wall and the inner surface wall of the fitting connection end portion in which the through hole is formed.

Then, these two packings are joined to each other via the through holes.

[Effect]

Since the first and second packings are joined together through the through-hole, the packings are joined to each other more easily than the packings are joined to the fitting connection end of the passage means made of another material. The bond is much stronger.

〔Example〕

An embodiment of the fluid passage connection structure of the present invention will be described below with reference to the drawings.

FIG. 1 shows the overall structure of an air conditioner using the fluid passage connecting structure of the present invention, and the reference numeral 200 in the figure is a blower casing, which is a first passage means, and houses a blower 201 therein. This blower casing has an inside/outside air switching section 20.
2 is formed on the suction port side of the blower 201. Then, the inside/outside air switching damper 203 selectively introduces the air inside the vehicle interior and the air outside the vehicle interior.

Reference numeral 400 denotes a duct serving as a second passage means whose one end is fitted and connected to the blower casing 200;
can be replaced with a cooler casing when providing a cooling function to an automobile air conditioner. i.e. duct 4
00 connects between the blower casing 200 and a heater casing, which will be described later, until the cooler casing is attached.

A heater casing 300 serves as a first passage connected to the other end of the duct 400, and houses a heater core 301 therein. The heater core 301 exchanges heat between the cooling water of the vehicle engine and the air to generate warm air.

Further, an air mix damper 302 is arranged in the heater casing 300 to adjust the temperature by controlling the amount of air flowing toward the heater core 301 side. Furthermore, the heater casing 300 has a plurality of air outlets 304.3.
05 and 306 are opened toward the head and thorax of one passenger and the feet of the passenger, respectively, on the window glass side of the vehicle (not shown).

FIG. 2 shows the structure of the connecting portion of the duct 400, which is the second passage means. As shown in this figure, a fitting connection end 400 of a duct 400 having a rectangular opening 400c
Two oblong through holes 400b penetrating from the outer wall 41 to the inner wall 42 are provided in each of the long side surfaces and one each of the short side surfaces. The size, shape, and number of the holes 400b vary depending on the size, wall thickness, shape, and amount of elastic deformation of the packings 501 and 502, which will be described later, of the fitting connection end 400a. , 502 have a sufficient size to bulge out and adhere to each other within the through hole 400b, and their size and number are such that they do not cause deterioration in the strength of the fitting connection end 400b.

Next, in Figure 3, the duct 400 and the blower casing 2.00
This shows the connection structure between As shown in this figure, the fitting connection end 200a of the blower casing 200 has a rectangular opening 200, and the opening area of the opening 200C of the blower casing 200 is larger than the opening area of the opening 400C of the duct 400. small.

That is, the mating connection end 200 of the blower casing 200
a into the fitting connection end 400a of the duct 400.

A first packing 501 made of a foam material and having a thickness of 4 to 6 cylinders is bonded to the outer surface wall 41 of the fitting connection end 400a of the duct 400 with an adhesive or double-sided tape placed on the packing 501, It covers the through hole 400b. Further, the second packing 5 is also attached to the inner surface wall 42 in the same manner.
02 is joined so as to cover the through hole 400b. The first gasket 501 and the second gasket 02 are integrally molded, and a single rectangular gasket 500 is bent at the open end of the duct 400 and joined to the inner and outer wall surfaces 41 and 42. There is.

The first packing 501 and the second packing 502 have portions 500a and 500b that cover the through hole 400°b.
The parts 500a and 500b are bulged and deformed in the direction in which they approach each other due to their elastic force, and the parts 500a and 500b are joined by adhesive or double-sided tape placed on the surfaces of each other.

In other words, the double-sided tape and adhesive bond together, and the parts 500a and 500b of these sealing gaskets 501 and 502
The bonding force between the packing 500 and the duct 400 is much stronger than the bonding force between the packing 500 and the duct 400. Note that when the packing 500 is attached, the opening area of the opening formed by the inner circumferential wall of the second packing 502 is smaller than the opening area of the opening 200c of the blower case 200.

That is, since the packing 500 is compressed by a predetermined amount, the fitting connection end 200a can be fitted and inserted into the duct 400a.

Next, a procedure for assembling the blower casing 200 and the duct 400 in the above configuration will be explained.

A first packing 501 and a second packing 502 are attached to the outer surface wall 41 and the inner surface wall 42 of the fitting connection end 400a of the duct 400.
to join. and a portion 50 located in the hole 400b
Part 500a so that 0a and 500b are joined to each other
and press 500b. As a result, the first patchkin 5
01 and the second packing 502 are joined.

Next, the fitting connection end 400a of the duct 400 to which the packing 500 is joined is directed toward the fitting connection end 200a of the blower casing 200, and the fitting connection end 400a is fitted so as to cover the outer periphery of the fitting connection end 200a. It's crowded.

Although the opening area of the opening 400c with the packing 500 joined is smaller than the opening area of the opening 200C, the sealing packing 500 has elastic force, and the fitting connection end 4
The sealing gasket 500 on the inner peripheral side of 00a is compressed in the outer peripheral direction by the fitting pressure of the fitting connection end 400a. Therefore, the fitting connection end 400a can be fitted into the fitting connection end 200a.

Here, the fitting connection end 400a and the fitting connection end 200a
In the connected state, the sealing punch 500 is compressed and deformed. For this reason, the elastic force of e-kin for sealing,
In other words, the restoring force causes the outer wall of the fitting connection end 200a to be pressed toward the center by the sealing knocking 500.

Therefore, the fitting connection end 400a and the fitting connection end 200a are always crimped and fixed due to the restoring force of the sealing gasket 500.

Note that the bonding force between the portion 500a of the first packing 501 and the portion 500b of the second packing 502 has a sufficient value so that the casing 200 and the duct 400 will not be separated from each other by fitting.

Further, to connect the duct 400 and the heater casing 300, the connecting end of the duct 400 to which the sealing gasket is joined is inserted into the connecting end of the heater casing 300. The other parts are the same as the joint structure between the casing 200 and the duct 400. In other words, the connecting end to which the sealing gasket is joined can be inserted into the unjoined connecting end.

Next, other embodiments will be described.

FIG. 4 shows another embodiment of the packing, and this packing 6
00 has a band-shaped base 600a having approximately half the width of the packing 500 used in the above embodiment, and a rectangular matching portion 600b integrally formed with this 600a. This sealing gasket 600 is attached to the connecting end 400a of the duct 400 shown in FIG. At this time, the mating portion 600b is attached to a position facing the hole 400b, and the base portion 600a is attached to the other surface side of the connecting end portion 400a. Then, the base 600a is inserted through this hole 400b.
and the mating portion 600b are joined.

Note that whether the mating portion 600b is located on the outer periphery or the inner periphery of the connecting end portion 400a changes depending on the connection state when the connecting end portions are fitted together.

The other configurations and connection structures are the same as in the previous embodiment.

Conventionally, in order to maintain bonding force, a seal was connected to the entire circumference of the inner and outer walls of the fitting connection end, but since the seal and the seal are strongly connected to each other through the hole, the There is no need to join the packing around the entire circumference of the fitting connection end for the parts where there is no fitting connection end. Therefore, the number of gaskets to be joined can be reduced.

It is also possible to connect a duct to each outlet of the heater casing and use the above-mentioned joint structure at the connection portion.

In the above description, the casing is connected to the duct, but the connection between the casings and the ducts is also possible. For example, two ducts may be connected when the tala casing is located at the position of the duct, or between the blower casing and the heater casing.

Alternatively, through holes may be formed in both fitting connection ends to be fitted and connected, and a gasket may be joined to the fitting connection ends to fit and connect the binocular stand connection ends.

〔Effect of the invention〕

By providing multiple holes in the connection part as described above,
Since the first packing and the second packing are bonded to each other through these holes, the bonding force of the packing to the case or duct is increased, so that the packing can be reliably bonded and will not come off. Therefore, assembly becomes easy, and there is no possibility that the gasket will come off and air will come into contact with the gasket, thereby causing contact noise or abnormal noises due to turbulence in the air flow.

Also, the gasket will not come off due to air pressure.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the overall structure of an air conditioner according to an embodiment of the present invention, Fig. 2 is a view showing the connecting part of the connecting means (duct), and Fig. 3 is the first casing (blower casing).
FIG. 4 is a diagram showing another embodiment of the present invention, and is a diagram showing the structure of a sealing packing. 41...Outer surface wall, 42...Inner surface wall, 200,300
...First passage (blower casing, heater casing), 400...Second passage (duct), 400a...
Fitting connection end, 400b... through hole, 501... first packing, 502... second packing.

Claims (1)

[Claims] A first passage means through which a fluid passes; and a second passage means which is fitted and connected to the first passage means and through which the fluid passed through the first passage means passes. a through hole penetrating from the outer surface wall toward the inner surface wall is formed at the fitting connection end of the second passage means with the first passage means, and the fitting connection of the second passage means A fluid passageway characterized in that a first packing and a second packing are joined to the outer surface wall and the inner surface wall of the end portion, and the both packings are joined to each other via the through hole.