阅读说明：本技术 用于集管箱的盖 (Cover for header tank ) 是由 G.皮勒 S.波托 J-J.加西亚 D.莱克莱尔 于 2019-07-01 设计创作，主要内容包括：本发明涉及一种用于热交换器(1)的集管箱的盖(20),特别用于机动车辆,特别是散热器,所述盖包括：头部(21)；包括至少一个组装斜面(23)的柄(22),所述柄位于头部和盖的自由端之间；以及特别是弹性可变形的保持凸耳(30),其布置成在盖的中间位置将盖保持在集管箱的开口(10)中,在该位置,盖留出自由通道同时仍保持在该开口中,所述保持凸耳形成在柄上。(The invention relates to a cover (20) for a header tank of a heat exchanger (1), in particular for a motor vehicle, in particular a radiator, comprising: a head (21); a shank (22) comprising at least one assembly ramp (23), said shank being located between the head and the free end of the cap; and a retaining lug (30), in particular elastically deformable, arranged to retain the cover in an opening (10) of the header tank in an intermediate position of the cover, in which position the cover leaves free access while still remaining in the opening, said retaining lug being formed on the shank.)

1. Cover (20) for a header tank of a heat exchanger (1), in particular for a motor vehicle, in particular a radiator, comprising:

-a head (21),

-a shank (22) comprising at least one mounting thread (23), the shank being located between the head and a free end of the cap,

-a retaining lug (30), in particular elastically deformable, arranged to retain the cover in an opening (10) of the header tank in an intermediate position of the cover, in which position the cover leaves clear passage while remaining in the opening, the retaining lug being formed on the shank.

2. The lid of the preceding claim, wherein the retaining lug (30) is elastically deformable, such that when the lid is put in place, the retaining lug can adopt a retaining position and a release position to allow the lid to move in the opening of the header tank.

3. The cap of any one of the preceding claims, wherein the cap has a longitudinal axis and the retention lug comprises a side wall (40), which is preferably inclined with respect to the longitudinal axis, in particular at an angle of between 30 ° and 60 °, in particular about 45 °.

4. Cover according to the preceding claim, wherein the lug comprises a bearing flange (41) arranged to press against an axial stop of the opening of the header tank.

5. Lid according to the preceding claim, wherein the flange (41) is connected to the side wall (40), in particular at an angle of between 90 ° and 180 °, in particular between 100 ° and 160 °.

6. The closure as claimed in claim 4 or 5, wherein said retaining lug is connected to a base of said stem, in particular curved.

7. The cover according to any one of the preceding claims, wherein the cover comprises a thread comprising a substantially helical side wall (46) arranged to allow mounting of the cover in an opening of the header tank, in particular by a quarter turn.

8. Cover according to the previous claim, wherein said thread comprises a rotation locking pin (49) arranged to interact with a stop of said header tank to prevent rotation of said cover when it is in said intermediate position.

9. The cap of any one of the preceding claims, wherein the head comprises a slot (59) arranged to receive a screwdriver to turn the cap.

10. A heat exchanger (1) comprising a header tank provided with an opening and a cover as claimed in any one of the preceding claims, said cover being mounted in said opening.

Technical Field

More particularly, the present invention relates to a cover for a header tank of a heat exchanger.

Background

Heat exchangers, such as motor vehicle radiators, usually comprise at least one water tank or header tank mounted at the end of a bundle of tubes through which a fluid flows, such as the coolant of the motor vehicle's internal combustion engine. It is known practice to form a hole or opening in the wall of the tank and to close this hole by means of a cap comprising an operating head, a mid-portion fitted with a seal and a shank formed with radial ribs forming a thread which interacts with a complementary thread on the edge of the hole of the tank for mounting the cap in the hole and retaining it in a sealed closed position of the hole.

To purge or empty the exchanger, the cover is rotated, for example, a quarter turn, from the closed position. It must then be pulled outwards by translation along its axis to perform the flushing or emptying of the exchanger. The latter operation is not necessarily obvious to an inexperienced person.

FR2588367 describes such a cover.

Such a conventional cap has the following disadvantages.

The lid is too large to fit in a new water tank. Manufacturers tend to demand space savings in the engine compartment and provide increasingly compact cooling units, which means that the radiator tank is of increasingly smaller width.

In addition, it is not always possible to insert a manually tightened cap by hand.

Furthermore, a degassing function is often added to the exchanger, in particular the radiator, to allow air to escape during filling with water/glycol or other heat transfer fluid. Currently, heat sinks are degassed using degassing caps or degassing tubes.

The cover must be fastened by hand and there is always insufficient room to enter the engine compartment for hand insertion. This is a problem.

In addition, in certain applications, when the lid is opened for evacuation or degassing, it is necessary to prevent the lid from disengaging or jumping out, i.e., the lid remains open while remaining in the opening or aperture.

Disclosure of Invention

The present invention is directed to overcoming at least some of the disadvantages or requirements set forth above.

The present invention therefore relates to a cover for a header tank of a heat exchanger, in particular for a motor vehicle, in particular a radiator, comprising:

-a head portion of the device,

a shank comprising at least one mounting thread, the shank being located between the head and the free end of the cap,

a retaining lug, in particular elastically deformable, arranged to retain the cover in the opening of the header tank in an intermediate position of the cover, in which position the cover leaves clear passage while remaining in the opening, the retaining lug being formed on the shank.

According to the invention, the retaining lug makes it possible to retain the cover, which is particularly advantageous when the environment of the vehicle surrounding the exchanger does not allow easy handling of the cover, in particular in the absence of installation space for insertion hands.

According to an aspect of the invention, the retention lugs are resiliently deformable such that when the cover is placed in position, the retention lugs can adopt a retention position and a release position to allow the cover to move within the opening of the header tank.

According to an aspect of the invention, the retaining lug is arranged closer to the free end of the cap than the head.

According to an aspect of the invention, the holding lug is arranged on the lower half of the shank on the free end side.

According to an aspect of the invention, the cap has a longitudinal axis and the retention lug comprises a side wall which is preferably inclined with respect to the longitudinal axis, in particular at an angle of between 30 ° and 60 °, in particular about 45 °. The side wall has in particular a spiral profile.

According to an aspect of the invention, the lug comprises a bearing flange arranged to press against an axial stop of the opening of the header tank.

According to an aspect of the invention, the flange is in particular connected to the side wall at an angle of between 90 ° and 180 °, in particular between 100 ° and 160 °.

According to an aspect of the invention, the holding lug is connected to the base of the shank, in particular is arc-shaped.

According to one aspect of the invention, the retention lug is adjacent the threads of the shank.

According to an aspect of the invention, the retaining lug is integrally formed with the shank, in particular by moulding.

According to an aspect of the invention, the retaining lug is single and is present on only one side of the shank.

According to an aspect of the invention, the shank comprises at least one thread between the retention lug and the head when the cap is viewed from the side.

According to an aspect of the invention, the thread comprises a substantially helical side wall arranged to allow mounting of the cover in the opening of the header tank, in particular by a quarter turn.

According to an aspect of the invention, the thread comprises a rotation locking pin arranged to interact with a stop of the header tank to prevent the cover from rotating when it is in the intermediate position.

According to an aspect of the invention, the locking pin faces the free end of the cover.

According to an aspect of the invention, the cap includes a seal mounted below the head.

According to an aspect of the invention, the shank comprises a retaining plate arranged to accommodate a seal, in particular an O-ring, between the plate and the head.

According to an aspect of the invention, the holding plate and the shank are integrally formed, in particular of a plastic material.

According to an aspect of the invention, the head, the shank and the plate are integrally formed, in particular of a plastic material.

According to an aspect of the invention, the head comprises a slot arranged to receive a screwdriver to turn the lid.

According to an aspect of the invention, the slot has an elongated shape.

The invention also relates to a heat exchanger comprising a header tank provided with an opening and a cover according to the invention, which is mounted in the opening.

According to an aspect of the invention, the opening comprises one or more radial projections, one of said projections defining an axial stop for retaining the lug.

According to an aspect of the invention, there are two radial protrusions, in particular substantially diametrically opposite each other.

According to an embodiment of the invention, the heat exchanger, in particular the radiator, for example a low temperature radiator, has a degassing function to allow air to escape during filling with water/glycol or other heat transfer fluid.

Drawings

The invention will be better understood and other details, features and advantages thereof will become apparent from a reading of the following description, given by way of non-limiting example with reference to the accompanying drawings, in which:

figures 1 to 5 show schematically and partially in various views a heat exchanger according to an embodiment of the invention.

Detailed Description

Fig. 1 shows a heat exchanger 1, in this case a motor vehicle radiator, comprising a water tank or water collection tank 2.

The header tank 2 is typically mounted at the end of the tube bundle 3.

The top wall 4 is formed by moulding with a degassing conduit 5 comprising a cylindrical opening 10 formed adjacent to the top wall 4.

The inner edge of the opening 10 comprises radial protrusions 11.

The header tank 2 is in fluid communication with the tubes of the tube bundle 3 in a manner known per se.

A cover 20 is provided to interact with the header tank 2.

As shown in fig. 2 and 3, the cover 20 includes:

a substantially cylindrical head portion 21 having a cylindrical shape,

a shank 22 comprising a plurality of mounting threads 23, the shank 22 being located between the head 21 and a free end 24 of the cap 20,

a retaining lug 30 arranged to retain the cover 20 in the opening 10 of the header tank 2 in an intermediate position of the cover 20, in which position the cover 20 leaves a clear passage 31 while remaining in the opening 10, the retaining lug 30 being formed on the shank 22, as can be seen more clearly in fig. 5.

Retaining lug 30 is resiliently deformable through a small range of motion so that when the lid is placed in position, the retaining lug can adopt a retaining position and a release position to allow lid 20 to move within opening 10.

The retention lugs 30 are disposed closer to the free end 24 of the cap than the head 22.

A retaining lug 30 is arranged on the lower half of the shank on the free end 24 side.

As shown in particular in fig. 4 and 5, the cap 20 has a longitudinal axis X and the retention lug 30 comprises a side wall 40 inclined with respect to this longitudinal axis X, in particular at an angle of between 30 ° and 60 °, in particular of about 45 °. The side wall 40 has in particular a spiral profile.

The retaining lug 30 comprises a bearing flange 41 arranged to press against an axial stop formed by one of the radial projections 11 of the opening 10.

The flange 41 is in particular connected to the side wall 40 at an angle a of between 90 ° and 180 °, in particular between 100 ° and 160 °.

The retention lug 30 is connected to the arcuate base 44 of the shank 22.

The retaining lug 30 is adjacent the shank thread 23.

The retaining lug 30 is formed integrally with the shank 22, in particular by moulding.

The retaining lug 30 is single.

When cap 20 is viewed from the side, the shank includes threads 23 between retaining lug 30 and head 21.

The thread 23 comprises a substantially helical side wall 46 arranged to allow mounting of the cover in the opening of the header tank, in particular by a quarter turn.

The top thread 23 comprises a rotation locking pin 49 arranged to interact with a stop 50 of the header tank to prevent the rotation of the cover 20 when it is in the intermediate position, as shown in particular in fig. 2.

The locking pin 49 faces the free end 24 of the cover.

The cap 20 includes a seal 53 mounted below the head 21.

The shank includes a retaining plate 54 arranged to receive an O-ring 53 between the plate and the head.

The head 21, the shank 22 and the plate 54 are integrally formed, in particular of plastic material.

The head 21 comprises a slot 59 arranged to receive a screwdriver for turning the lid.

The slot 59 has an elongated shape.

Fig. 4 shows in a sectional view the complete insertion of the cover 2 in the opening 10 in a sealing manner. The top thread 23 is then below the radial projection 11 to prevent translation along the axis X.

The seal 53 provides a seal in the opening 10.

Fig. 5 shows the cover 20 in a sectional view in an intermediate position, i.e. translated upwards with respect to fig. 4. In this intermediate position, the pin 49 may prevent the cover from rotating. The radial projections 11 engage between the bottom thread 23 and the top thread 23, with the retention lug 30 pressing on one of the projections 11, so that the lid can be retained in the direction of the axis X. The gas can leave the header tank 2 through the open passage 31 while the cover is firmly anchored in the opening 10.

The exchanger may comprise:

a plurality of tubes 3 in which a heat transfer fluid can circulate,

a plurality of fins 70 arranged between the tubes 3, in particular in contact with these tubes, as shown in figure 1.

It will thus be seen that the cover 20 may adopt an intermediate position which allows the passage of air and/or water and/or gas.

In this intermediate position, the lid 20 is free to rotate and is held when released so that it cannot be disengaged.