KR20010059266A - Manifold for laminate type heat exchanger of car airconditioner - Google Patents

Abstract

PURPOSE: A manifold for a stack type heat exchanger is provided to prevent a connecting portion between an inlet/outlet pipe and an inlet from being distorted or damaged by moment of the inlet/outlet pipe by offsetting the moment in a process of assembling a heat exchanger assembly on the inlet/outlet pipe. CONSTITUTION: A manifold(2) for a stack type heat exchanger consists of two Al plates(2a,2b) having symmetric structure. Each plate includes: flat heat exchanging tubes(26); two tanks(22,23) formed parallel at the upper end of the heat exchanging tubes; an inlet(21) extended from one(22) of the two tanks toward outside, having hemispherical sectional area; a partition bead(24) protruded downward between the two tanks; and a bonding portion(27) having flange form around the edge. A corrugated portion(25) of the inlet absorbs moment transferred to the inlet from an inlet/outlet pipe(3). Therefore, a connecting part between the inlet/outlet pipe and the inlet is prevented from distortion or damage even though the moment is applied to the inlet/outlet pipe in an assembling or carrying process.

Description

MANIFOLD FOR LAMINATE TYPE HEAT EXCHANGER OF CAR AIRCONDITIONER}

The present invention relates to a stacked heat exchanger manifold installed for inflow and outflow of heat exchange fluid (cooling water or refrigerant) in a stacked heat exchanger of an automotive air conditioner, and more specifically, to inlet and outlet pipes for heat exchange fluid flow and discharge. In and out of the manifold to which the manifolds are respectively coupled, the moment of inlet and outlet pipes generated by the worker during the heat exchanger assembly process is absorbed and exhausted by the strain energy to prevent damage to the joint between the inlet and outlet pipes and the manifold inlet. A manifold for stacked heat exchangers having a pleated portion that can be prevented.

A car air conditioner is a vehicle interior that is installed to cool or heat a car interior in summer or winter, or to remove frost from a windshield during rainy or winter seasons. At the same time, by selectively introducing outside air or bet from outside or inside the car, the air is cooled or heated, and then blown into the inside of the car to cool, heat or ventilate the inside of the car. Or remove the frost from Wind Shield Glass.

That is, the air conditioner of an automobile includes a blower (Blower) that selectively introduces and blows inside and outside air in a case communicating interior and exterior of the vehicle, and an evaporator which is heat exchangers for cooling or heating the air blown by the blower ( Built-in evaporator, heater, and temperature control door to adjust the ratio of the amount of air flowing into the heater, and selectively introduces indoor or outdoor air by the blower, and then introduces the air into the case. It is a device for cooling, heating or ventilating the interior of the vehicle by cooling or heating with the evaporator and the heater and then discharging it to the interior of the vehicle while selectively passing the heater through the evaporator installed in the temperature control door.

In such an air conditioner, heat exchangers such as an evaporator and a heater are disposed in a lateral direction on a blower path formed by an air conditioning case while forming a configuration of a circulation cycle through which heat exchange fluid (refrigerant or cooling water) is circulated. Iii) a heat exchanger that heats or cools the air blown through the blower by heat exchange with the heat exchange fluid, and in particular, the stacked heat exchanger, as shown in FIG. 1, a blower in an air conditioning case (not shown). Between the heat exchange tubes (1) and a plurality of heat exchange tubes (1) arranged in the cross-sectional direction of the communication with each other through the tank portion of each upper end to form a flow path that is evenly disposed on the cross section of the ventilation path therein While interposed to form a flow path communicating with the heat exchange tubes (1), the flow path is connected to a water jacket (not shown) or an expansion valve (not shown) on one side of each upper end. Is coupled to the inlet pipe (3) or outlet pipe (4, hereinafter abbreviated as inlet and outlet pipe (3) (4)) connecting to other components of the heat exchange fluid circulation cycle, such as a compressor (not shown) Configurations such as a plurality of heat exchange fins 5 and the like, which include two manifolds 2 and, as an optional configuration, interposed between the heat exchange tubes 1 to enlarge the heat transfer area of the heat exchange tubes. Is made of.

According to this configuration, the heat exchanger flows the heat exchange fluid circulating through the heat exchange fluid circulation cycle through the inlet pipe (3) of the one side manifold (2) for inflow and flows evenly along the heat exchange tubes (1). By discharging through the outlet pipe (4) of the other side manifold (2) of the heat exchange fluid between the heat exchange fluid and the heat exchange tube (1) to heat the air flowing into the interior of the car to heat or cool the air discharged to the interior of the vehicle .

In the laminated heat exchanger having such a function, the manifold 2 connected to the other heat exchange fluid circulation cycle configuration outside the air conditioner case (not shown) by the inlet and outlet pipes 3 and 4 is generally shown in FIG. As can be seen in the sectional view, two plates 2a and 2b formed side by side with two tank portions 22 and 23 having tank holes 22a and 23a at the upper end are joined to each other and joined. 3, an entrance portion 21 for connecting the inlet pipe 3 (or the outlet pipe 4) to the tank portion 22 is extended and molded in one tank portion 22.

On the other hand, the laminated heat exchanger is transported with the inlet pipe (3) and the outlet pipe (4) coupled to the manifold (2) or mounted in the air conditioning apparatus, at this time the operator is mainly inlet, outlet pipe (3) ( 4) Grab and transport or assemble the stacked heat exchanger. In such a case, a bending moment is applied to each inlet and outlet pipes 3 and 4 by an operator when carrying or assembling a laminated heat exchanger, and thus the inlet and outlets of the oil and discharge manifolds 2, and the inlet and outlet thereof. A strong stress is generated in the engaging portion A between the pipes 3 and 4 by the bending moment of the inlet and outlet pipes 3 and 4.

However, the conventional manifold 2 for the laminated heat exchanger has a structure capable of reducing the moment of the corresponding means, for example, the inlet and outlet pipes 3 and 4, or alleviating the stress concentration. Since it does not have a problem that the deformation or cracking easily occurs in the engaging portion (A) between the entrance and exit pipe (3) (4) and the entrance portion 21, which is relatively weak during transportation or assembly. The problem of the laminated heat exchanger manifold is that the laminated heat exchanger manifold (2) is a factor that causes defects in the whole of the laminated heat exchanger formed by integrating with the heat exchange tubes (1) by the welding process, and as a result, the manufacturing cost of the heat exchanger. It caused a problem of elevating.

As described above, the conventional manifold for the laminated heat exchanger has a manufacturing cost of the heat exchanger because the coupling portion between the inlet and outlet pipes (3) and (4) and the inlet and outlet 21 is easily deformed or damaged by a small external force. It has been a factor to increase.

The present invention can solve the problems of the conventional manifold for stacked heat exchanger as described above, the inlet or outlet of the heat exchange fluid inlet or outlet, the moment of inlet and outlet pipes generated by the operator during the assembly process, etc. To provide a manifold for a laminated heat exchanger that can be absorbed and exhausted by the strain energy and thus prevent deformation or damage of the joint between the entry and exit pipe and the entrance, which is relatively weak by the moment of the entry and exit pipe. The purpose.

1 is a front view of a typical laminated heat exchanger.

Figure 2 is a cross-sectional view taken along the line II-II of Figure 1 conventional manifold for stacked heat exchanger.

Figure 3 is an exploded perspective view of a manifold for a stacked heat exchanger according to an embodiment of the present invention.

Figure 4 is a cross-sectional view taken along the line II-II of Figure 1 the manifold of the stacked heat exchanger manifold according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

1: heat exchanger tube 2: manifold

21: entrance part 2a, 2b: left, right plate

22, 23 tank portion 24 compartment bead

25: corrugated portion 26: heat exchange passage

27 junction 3: inlet pipe

4: outlet pipe 5: heat exchange fin

In the manifold for stacked heat exchanger according to the present invention devised for the purpose as described above, two tanks 22, 23 are juxtaposed at the top, and the partition bead extending straight in the downward direction between the two tanks ( 24, the partition bead bypasses downward to form a U-shaped flow path connecting the two tank portions, wherein the one tank portion 22 extends outward from the tank portion 22, In a stacked heat exchanger manifold having an inlet portion 21 which is molded and to which an inlet and outlet pipe 3 (or 4) is coupled, the outlet portion 21 is an inlet and outlet pipe 3 (or 4). It is characterized in that it comprises a wrinkle portion 25 that can be exhausted by absorbing the moment transmitted from the strain energy according to the plastic deformation.

Hereinafter, a preferred embodiment of the present invention looks at in more detail through the accompanying drawings.

In describing the embodiments of the present invention, for the sake of clarity, the same reference numerals are used for the configurations of the present invention that are identical to those of the prior art described at the outset.

3 is an assembly view of a manifold for a stacked heat exchanger according to an embodiment of the present invention.

As illustrated, the manifold 2 for a laminated heat exchanger according to the present invention is formed by joining two plates 2a and 2b, which are molded articles made of aluminum, having a symmetrical structure, to each other, and each plate 2a and 2b. ) Is a smooth heat exchange passage 26, two tank portions 22 and 23 recessed alongside the upper end of the heat exchange passage 26, and one tank 22 of the two tanks An entrance portion 21 having a hemispherical cross-section toward it, a partition bead 24 protruded downwardly between the two tank portions 22 and 23, and a flange-shaped elevation along the edge. It has joints 27.

The two plates 2a and 2b of such a symmetrical structure are joined to each other, and the joints 27 and the partition beads 24, which are in contact with each other through a brazing process, are welded to each other so that the two plates 2a and 2b face each other. Oil and discharge having a flow path leading from the tank portion 22 having the entry and exit portion 21 between the heat exchange flow passages 26 to the other tank portion 23 by bypassing the bottom end (not shown) of the partition bead 24. The dragon manifold 2 is formed.

Two manifolds (2) having such a structure are interposed between the heat exchange tubes (1), respectively, and adjacent heat exchange tubes (1) through tank portions (22) and (23) tank holes (22a) (23a) at their upper ends. As the inlet and outlet pipes 3 and 4 are respectively coupled to the inlet and outlet 21 extending from each tank 22, the heat exchange fluid is directed in the cross-sectional direction of a blower (not shown). It serves as the inlet and outlet chambers of the heat exchange tubes (1) forming a flow path to distribute evenly distributed.

In particular, the manifold (2) for heat exchange fluid flow and discharge according to the present invention is a moment generated from the inlet and outlet pipes (3) (4) by the operator in the assembling process or transportation process to the entry portion 21. It has a wrinkle portion 25 to absorb and exhaust. The corrugated portion 25 carries the heat exchanger assembled as shown in FIG. 1 with the inlet and outlet pipes 3 (or 4) coupled thereto or when installed in an air conditioning case. The inlet and outlet pipe 3 (or 4) coupled to the entry and exit 21 is carried out to perform the operation of the moment, the moment is applied to the inlet and outlet pipe (3) (or 4) frequently, In this case, the moment is accumulated by the stress energy generated by each corrugation and accumulated by its own strain energy so as to be exhausted so that the moment generated in the inlet and outlet pipes 3 and 4 is not transmitted to the entrance 21. Play a role.

As described above, in the stacked heat exchanger manifold 2 according to the present invention, the pleats 25 formed at the entrance 21 are transferred from the inlet and outlet pipes 3 and 4 to the entrance 21. Combining part between the inlet and outlet pipe 3 and the inlet and outlet 21 even when the moment is coming into the inlet and outlet pipes 3 and 4 by the worker during the assembly or transportation process. (A) is not deformed or damaged. Thus, the heat exchanger failure rate generated after being integrated with the heat exchange tube 1 to become a finished product heat exchanger can be greatly reduced.

According to the manifold for a laminated heat exchanger according to the present invention as described in detail above, by forming the corrugation portion formed in each of the entrance and exit portion by absorbing the moment of the inlet and outlet pipes generated by the operator in the assembling process, and exhausted by the strain energy, It is possible to prevent the deformation and damage frequently occurring at the joint between the inlet and outlet pipe and the inlet part which causes the heat exchanger to be defective. Accordingly, since the defect rate of the heat exchanger generated after the integration of the air conditioning case and the like after being integrated in the heat exchange tube and the welding process can be greatly lowered, the manufacturing cost of the heat exchanger can be reduced as a result.

Claims (1)

Two tank portions are juxtaposed at the top, and partitions of the partition beads extending in a downward direction between the two tank portions form a U-shaped flow path that bypasses the partition beads downward and connects the two tank portions. In the one tank portion is a lateral manifold for stacked heat exchanger having an entrance portion extending from the tank portion in the lateral direction, the inlet and outlet pipe is coupled, The entrance part has a corrugation part that can absorb and exhaust the moment transmitted through the inlet and outlet pipes by plastic deformation by itself.