JPS6247033Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Industrial Field of Application) The present invention relates to a heater core in an air conditioner for an automobile, and particularly relates to an improvement in the sealing structure of a tank.

(Prior Art) As shown in FIG. 1, the heater core includes a pair of tanks 24 and 25 whose main bodies 24a and 25a are integrally connected to seat plates P and P, respectively, and which connects both tanks 24 and 25. Consisting of tubes 26 and heat transfer fins 27 fixed between the tubes 26, one tank 24 is fitted with an engine cooling water inflow conduit 15a and an outflow conduit 15b, and the inside of this tank 24 is partitioned. The engine cooling water flowing in from the inflow conduit 15a by the plate 33 is passed from one chamber of the tank 24 through the pipe 26 to the tank 2.
5, the water flows from the tank 25 into a room on the other side of the tank 24 through a U-turn and flows out from the outflow conduit 15a. and the heat transfer fin 2
The air flowing through the space is heated by heat exchange.

As shown in FIGS. 2 and 3, the tank having the partition plate 33 in this heater core has an annular groove 28 with a U-shaped cross section formed around the outer periphery of the seat plate P. A large number of through holes 29 are bored in a row in the side plate. Tank body 24a
is formed of synthetic resin into a substantially box-like shape with one side open, and a large number of protrusions 30 are provided protruding from the outer periphery of the side surface over the entire circumference. Annular groove 28 of the seat plate P
A seal ring 31 made of an elastic material and formed in substantially the same shape as this annular groove 28 is fitted inside, and by fitting the open end of the tank body 24a into this annular groove 28, the tank is closed. Main body 2
The seal ring 31 is deformed under pressure between the lower surface of the annular groove 4a and the bottom surface of the annular groove 28 to form a seal.

The partition plate 33, which is integrally provided at a substantially central position within the tank body 24a, holds a seal member 34 having a substantially U-shaped cross section between it and the seat plate P. 33 partitions are ensured. The sealing state of this seal member 34 and the seal ring 31 is as follows:
The protrusion 30 of the tank body 24a is achieved by fitting into the through hole 29, that is, by connecting the tank body 24a and the seat plate P.

However, in the heater core of such a conventional automobile air conditioner, the seal member 3
There is a problem in that the processing for 4 is extremely difficult, leading to an increase in costs.

That is, as shown in FIG. 4, the connection portion between the flat surface Pa of the seat plate P into which the tube 26 is inserted and the inner side wall 28a of the annular groove 28 is a curved radiused portion R. Between R and the tank body 24a, there is an elongated, approximately triangular gap 3.
2 is expected to occur. If this gap 32 is not reliably sealed, the sealing performance in the tank 24 will be incomplete, and the engine cooling water will bypass without heat exchange, which may reduce the heat exchange efficiency of the heater core.

Therefore, in order to reliably seal such a gap 32, the conventional sealing member 34 has rounded portions 3 of the partition plate 33 at both ends thereof, as shown in FIG.
3, and is curved so that both the upper and lower surfaces follow the radiused portion R and the radiused portion 33a on the partition plate 33 side so as to reliably fill the void 32, that is, the beak-shaped portion. 35 is formed. However, when molding the sealing member 34 having such a beak-shaped portion 35 using an elastic material such as rubber, a mold or the like is used, but in this case, it is necessary to perform precision processing on the mold. Repair work may also be required after molding, which is a cause of increased costs.

The present invention was developed by focusing on these conventional problems, and solves the above problems by making the sealing member easily deformable and omitting the molding of the beak-shaped parts at both ends. It is intended to.

[Structure of the invention] (Means for solving the problem) In order to achieve the above-mentioned object, the present invention is based on an annular tank body in which the opening end of a tank body having an opening on one side is formed around the outer periphery of a seat plate. A partition plate that fits into a groove to integrally connect the tank body and the seat plate, and partitions a hollow portion formed between the tank body and the seat plate at the time of this connection, and the seat plate. In a heater core for an automobile air conditioner configured to pressurize a sealing member provided between the partition plates, a concave rounded portion protruding toward the seat plate is formed at both longitudinal ends of the partition plate. , the sealing member integrally forms a rising wall portion that is fitted onto the partition plate and a bottom wall portion that abuts the seat plate, and at both longitudinal ends of the bottom wall portion,
Cutting off the rising wall portion of the portion corresponding to the radiused portion to form a rigid weakened portion having a right angle shape such that the end portion is subjected to pressurized deformation by the radiused portion, and the opposite side of the rigidity weakened portion. It is characterized by having protrusions formed on it.

(Function) With this configuration, when the tank is attached to the seat plate, the right-angled portion of the sealing member is pressurized, so the protrusion will surely enter the gap, and the gap between the seat plate and the tank will be reduced. This will improve sealing performance.

(Example) Hereinafter, an example of the present invention will be described, but since the other configurations except for the seal member are the same as those of the heater core shown in FIGS. 1 to 3, the description will be omitted.

FIGS. 6 and 7 are diagrams showing a sealing member applied to an embodiment of the present invention.

The sealing member 41 is generally made of an elastic material such as rubber, and has a bottom wall portion 45 and a rising wall portion 43. This bottom wall portion 45 is connected to the tank body 24.
It has a length equal to the length of the partition plate 33 provided at the center part in b. Further, the rising wall portion 43 has a substantially U-shaped cross section and has a void space 42 inside.

In particular, in this embodiment, both ends of the rising wall portion 43 are cut out by an appropriate length so that they do not have the same length as the bottom wall 45, and rigidity weakening portions 46 are formed at the corners of both ends of the bottom wall portion 45. , 46 are formed.

Further, on the opposite side of the stiffness weakening portions 46 formed at both ends of the bottom wall portion 45, a protrusion 47 is formed, and a shallow long groove 48 is formed between the protrusions 47.

Note that since the protrusion 47 has a simple shape, it can be easily molded using a mold.

Next, the effect will be explained.

The sealing member 41 having the above structure is set in such a manner that one end of the partition plate 33 of the tank body 24a is fitted into the space 42 and sandwiched between the rising walls 43, 43, as in the conventional case.

Next, the tank body 24b is inserted into the annular groove 28 of the seat plate P.
When the sealing member 41 is inserted, the sealing member 41 is compressed and deformed between the end of the partition plate 33 and the seat plate P. At this time, the stiffness weakening portions 46 and the protrusions 47 at both ends of the seal member 41 are elastically deformed from the state shown by imaginary lines in FIG. 8 to the state shown by solid lines, and the rounded portion R of the seat plate P and the tank body 24a into the gap 32 between the two.

That is, although concave rounded portions 33a protruding toward the seat plate P are formed at both ends of the partition plate 33 in the longitudinal direction, the rigidity weakening portion 46 is reduced by the rounded portions 33a on the side of the tank body 24a. It is pushed up and deformed into a curve along this rounded part 33a, and the excess thickness due to this deformation is the thick protrusion 47.
The protrusion 47 is pushed into the gap 32 so as to protrude, and the protrusion 47 is inserted into the tip of the gap 32, completely filling the gap 32.

This deformation is further facilitated by the cutout portion 44 formed at the end of the rising wall portion 43.

In other words, if a rising wall is formed all the way to the end like in a conventional seal member, the entire seal part has rigidity, so even if an attempt is made to deform it, it cannot be easily deformed. When the notch 44 is formed, the sealing member 41 is easily elastically deformed, so that the gap 32 is reliably filled with the sealing member 41.

In addition, the rigidity weakening portion 46 can be easily formed by integral molding using a mold.
The mold surface of the mold can also be simply molded, and there is no need for repair after molding. Therefore, the cost of the seal member 41 can be significantly reduced.

[Effects of the invention] As described above, according to the invention, concave rounded portions protruding toward the seat plate are formed at both ends of the partition plate in the longitudinal direction, and the sealing member is attached to the partition plate. A rising wall portion to be fitted and a bottom wall portion that abuts the seat plate are integrally formed, and the rising wall portions corresponding to the rounded portions are provided at both longitudinal ends of the bottom wall portion. By cutting, a right-angled stiffness weakening portion was formed so that the end part was pressurized and deformed by the rounded portion, and a protrusion was formed on the opposite side of the stiffness weakening portion, so that the protrusion was not connected to the seat plate. It will surely enter the gap between the partition plate, improving the sealing performance between the seat plate and the tank, and also making it easier to manufacture this seal member.
Manufacturing costs will also be reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a heater core of an automobile air conditioner, Fig. 2 is a partially cut-away front view showing a conventional example, and Fig. 3 is a sectional view taken along the line of Fig. 4. 4 is an enlarged cross-sectional view of the portion shown in FIG. 3, with part omitted; FIG. 5 is a partially cutaway side view of a conventional seal member; and FIG. 6 is a seal applied to an embodiment of the present invention. A partially cutaway side view of the member, FIG. 7 is a sectional view taken along the line of FIG. 6, and FIG. 8 is an enlarged partial sectional view corresponding to FIG. 4 showing an attached state. 24, 25...Tank, P...Seat plate, 24a,
25b...Tank body, 26...Tube, 27
... Heat transfer fin, 28 ... Annular groove, 29 ... Through hole, 30 ... Protrusion, 31 ... Seal ring, 32
...Gap, 33...Partition plate, 41...Sealing member, 42...Vacancy, 43...Rising wall portion, 44...
... Notch portion, 45 ... Bottom wall portion, 46 ... Rigidity weakening portion.

Claims (1)

[Scope of utility model claims] Almost box-shaped tank body 24 with one side open
The open end sides of a and 25b are fitted into the annular groove 28 formed on the outer periphery of the seat plate P to form the tank body 24.
a, 25b and the seat plate P are integrally connected, and at the time of this connection, the tank bodies 24a, 2
5b and the seat plate P, the heater core is configured to pressurize a sealing member 41 provided between the seat plate P and a partition plate 33 that partitions the inside of the hollow portion formed between the seat plate P and the partition plate 33. In, while forming concave rounded portions 33a protruding toward the seat plate P at both longitudinal ends of the partition plate 33,
The sealing member 41 integrally forms a rising wall portion 43 fitted to the partition plate 33 and a bottom wall portion 45 that abuts the seat plate P, and both longitudinal ends of the bottom wall portion 45 are formed integrally with each other. Then, a portion of the rising wall portion 43 corresponding to the radiused portion 33a is cut off to form a rigid weakened portion 46 having a right-angled shape such that the end portion is subjected to pressure deformation by the radiused portion 33a. A heater core for an automobile air conditioner, characterized in that a protrusion 47 is formed on the opposite side of a rigidity weakening part 46.