JP2005083725A - Integral heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an integral heat exchanger for suppressing a poor influence on a tube by relaxing thermal stress, based on a cooling refrigerant temperature difference near a partition board in the integral heat exchanger that allows one heat exchanger core to have two heat exchanger functions of main and sub heat exchangers that are independent of each other by partitioning the inside of a pair of upper/lower tanks in one heat exchanger by the partition board at mutually corresponding positions. <P>SOLUTION: The integral heat exchanger is composed so that small through holes 4a, 5b for circulating cooling water to the partition boards 4, 5 for dividing the inside of an in-side tank 2 and an out-side tank 3 are formed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an integrated heat exchanger in which one heat exchanger core has two or more independent heat exchanger functions.

  As a conventional integrated heat exchanger of this type, a pair of upper and lower headers (tanks) of one heat exchanger are partitioned by partition plates at positions corresponding to each other, thereby being independent of one heat exchanger core. There is known one that has two heat exchanger functions of a main heat exchanger and a sub heat exchanger (see, for example, Patent Document 1). The main heat exchanger is used as a radiator for cooling the engine, and the sub heat exchanger is used as a radiator for cooling a condenser, FCV base, AT oil, intercooler, and the like. Yes.

JP-A No. 200-18880 (Specification (page 2), FIG. 22)

  However, since the main and sub heat exchangers have different uses, the heat conditions are naturally also different from each other. Therefore, the main and sub heat exchangers are located in the partition plate portion that is the boundary between the main and sub heat exchangers. Both tubes may cause cracks and deformation due to thermal shock based on a temperature difference, and there is a problem in terms of durability and reliability.

  Therefore, conventionally, the tube located at the partition plate portion, which is the boundary between the main and sub heat exchangers, is made a dead tube so that the cooling medium does not flow, thereby interfering with the thermal shock of both. However, there is a problem that a thermal shock due to a temperature difference of the cooling medium is generated on both sides of the partition plate in the tank, thereby adversely affecting the tube.

  The problem to be solved by the present invention is to divide the inside of a pair of upper and lower tanks of one heat exchanger by a partition plate at a position corresponding to each other, so that main heat exchangers independent from each other in one heat exchanger core In the integrated heat exchanger that has two heat exchanger functions of the sub-heat exchanger and the sub heat exchanger, the thermal stress based on the cooling refrigerant temperature difference near the partition plate is alleviated, and adverse effects on the tube are suppressed. An object of the present invention is to provide an integrated heat exchanger capable of

  In order to solve the above-mentioned problem, an integrated heat exchanger according to claim 1 is configured by partitioning a pair of left and right or upper and lower in-side tanks and out-side tanks of one heat exchanger at a position corresponding to each other by a partition plate. In an integrated heat exchanger in which one heat exchanger core composed of a plurality of tubes and fins has two heat exchanger functions of a main heat exchanger and a sub heat exchanger independent of each other Further, at least a through-hole through which the cooling medium can flow is formed in the partition plate that partitions the inside of the in-side tank.

  The integral heat exchanger according to claim 2 is the integral heat exchanger according to claim 1, wherein through holes for allowing the cooling medium to flow through each other are also formed in the partition plate that partitions the inside of the out-side tank. It was set as the characteristic feature.

  The integrated heat exchanger according to claim 3 is the integrated heat exchanger according to claim 1 or 2, wherein the through hole is formed at a position closer to the heat exchanger core side. As a means.

In the integrated heat exchanger according to claim 1, as described above, a cooling medium is formed through the through-holes by forming the through-holes through which the cooling medium can circulate in the partition plate as described above. Since a part of the refrigerant flows, the temperature difference of the cooling medium in the vicinity of the partition plate is alleviated.
Therefore, the thermal stress based on the cooling refrigerant temperature difference in the vicinity of the partition plate can be relieved and adverse effects on the tube can be suppressed, thereby obtaining the effect that durability reliability can be improved.

  3. The integrated heat exchanger according to claim 2, wherein the partition plate that partitions the inside of the out-side tank is also formed with through holes that allow the coolant to flow through each other, whereby the partition plate on the out-side tank side is provided. The thermal stress based on the temperature difference of the cooling refrigerant in the vicinity can be relieved and adverse effects on the tube can be suppressed, and thereby the durability reliability can be further improved.

In the integrated heat exchanger according to claim 3, as described above, the through hole is formed at a position closer to the heat exchanger core side, so that the cooling medium at both tube positions partitioned by the partition plate is formed. The temperature difference relaxation rate can be increased.
Accordingly, it is possible to enhance the effect of suppressing the adverse effect on the tube based on the thermal stress.

  Embodiments of the present invention will be described below with reference to the drawings.

The integrated heat exchanger according to the first embodiment corresponds to the invention described in claims 1 and 2.
First, the integrated heat exchanger of Example 1 will be described with reference to the drawings.

  FIG. 1 is a conceptual diagram showing an integrated heat exchanger according to the first embodiment, and FIG.

  The integrated heat exchanger A according to the first embodiment is assembled with one heat exchanger core 1 in which a plurality of tubes 11 and fins 12 are alternately arranged in the vertical direction, and both left and right ends of the heat exchanger core 1. The in-side tank 2 and the out-side tank 3 are arranged.

  Further, a plurality of partition plates 4 and 5 are provided at positions closer to the lower side in the in-side tank 2 and the out-side tank 3 so as to partition the tanks 2 and 3 in the vertical direction at positions corresponding to each other. One heat exchanger core 1 composed of the tubes 11 and the fins 12 is configured to have two heat exchanger functions of a main heat exchanger B1 and a sub heat exchanger B2 that are independent from each other.

  The tube 11 at the position where the partition plates 4 and 5 are disposed is made a dead tube 11a by closing the opening portions at both ends, and the upper side is the main tube for the heat exchanger B1 with the dead tube 11a as a boundary. 11b, the lower part is a sub heat exchanger B2 tube 11c (see FIG. 2).

Through holes 4a and 5a through which cooling water (cooling medium) can circulate are formed at substantially central portions of the partition plates 4 and 5, respectively.
In addition, inlet pipes 2a and 2b and outlet pipes 3a and 3b are connected to both tanks 2 and 3 partitioned by the partition plates 4 and 5, respectively.

  In the first embodiment, the main heat exchanger B1 is a main radiator that cools the cooling water of the water-cooled engine, and the sub heat exchanger B2 is cooled by circulating the cooling water of the water-cooled intercooler 6 using the water pon W / P. It is designed to function as a sub radiator. In the first embodiment, the main radiator (main heat exchanger B1) and the sub radiator (sub heat exchanger B2) are set to different heat conditions.

Next, operations and effects of the first embodiment will be described.
In the first embodiment, since it is configured as described above, the cooling water heated by cooling the engine flows into the in-side tank 2 from the upper inlet pipe 2a into the in-side tank 2. The cooling water heated by cooling the superheated air in the intercooler 6 is cooled down while flowing into the out-side tank 3 while being cooled when passing through the tubes 11b constituting the heat exchanger B1. It flows into the in-side tank 2 from the inlet pipe 2b, and flows into the out-side tank 3 in a cooled state when passing through the tubes 11c constituting the sub heat exchanger B2.

  The main radiator (main heat exchanger B1) and the sub radiator (sub heat exchanger B2) are used for different purposes and have different thermal conditions. The water temperature also varies up and down at the boundary of the partition plate 4, but a part of the cooling water in either the upper or lower tank partitioned by the partition plate 4 in the in-side tank 2 is transferred to the partition plate 4. In order to flow into the other tank through the formed through-hole 4a, the temperature of the cooling water in the inflowing tank is corrected so as to approach the temperature of the cooling water on the outflow side. The temperature difference between the two cooling waters at the boundary portion partitioned by the plate 4 is relaxed.

Also in the out side tank 3, a part of the cooling water of either the upper or lower tank flows into the other tank via the through small hole 5 a formed in the partition plate 5. The temperature difference between the two cooling waters at the partitioned boundary is relaxed.
Therefore, the thermal stress based on the temperature difference between the cooling water in the vicinity of the partition plates 4 and 5 can be alleviated, and adverse effects on the tubes 11b and 11c can be suppressed, thereby improving the durability reliability. The effect is obtained.

  Next, another embodiment will be described. In the description of the other embodiments, the same components as those of the first embodiment are not shown, or the same reference numerals are given and the description thereof is omitted, and only the differences are described.

  In the second embodiment, as shown in the enlarged cross-sectional view of the main part of FIG. 3, the through small holes 4a (5a) formed in the partition plate 4 (5) are heated in the in-side tank 2 (out-side tank 3). This is different from the first embodiment in that the structure is formed on the exchanger core 1 side, that is, on the inner side position where the tube 11 is connected.

Therefore, in the second embodiment, the temperature difference relaxation rate of the cooling water at the positions of both tubes 11b and 11c at the boundary portion partitioned by the partition plate 4 (5) can be increased.
Accordingly, it is possible to enhance the effect of suppressing adverse effects on the tubes 11b and 11c based on thermal stress.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and design changes and the like without departing from the gist of the present invention are also included in the present invention.
For example, although the dead tube 11a is provided in the embodiment, it is not necessarily provided. In the embodiment, only one dead tube 11a is provided, but a plurality of dead tubes may be provided.

In the embodiment, an example in which only one through hole is provided is shown, but a plurality of through holes may be provided.
In the embodiment, both the partition plates 4 and 5 of the in-side tank 2 and the out-side tank 3 are used.
Although the through small holes 4a and 5a are formed in the above, the through small holes 4a may be formed only in the partition plate 4 on the in-side tank 2 side having a large temperature difference.

1 is a schematic diagram illustrating an integrated heat exchanger of Example 1. FIG. It is an expanded sectional view which shows the detail of the C section of FIG. It is a principal part expanded sectional view which shows the integrated heat exchanger of Example 2. FIG.

Explanation of symbols

A Integrated heat exchanger B1 Main heat exchanger B2 Sub heat exchanger 1 Heat exchanger core 2 Inner tank 2a Inlet pipe 2b Inlet pipe 3 Out side tank 3a Outlet pipe 3b Outlet pipe 4 Partition plate 4a Through small hole 5 Partition plate 5a Small through hole 6 Intercooler 11 Tube 11a Dead tube 11b Tube constituting main heat exchanger 11c Tube constituting sub heat exchanger 12 Fin

Claims (3)

By dividing the left and right or upper and lower pair of in-side tank and out-side tank of one heat exchanger with partition plates at positions corresponding to each other, one heat exchanger core composed of a plurality of tubes and fins can be connected to each other. In an integrated heat exchanger that has two heat exchanger functions of an independent main heat exchanger and a sub heat exchanger,
An integral heat exchanger, wherein a through small hole through which a cooling medium can circulate is formed in at least a partition plate that partitions the inside of the in-side tank.   2. The integrated heat exchanger according to claim 1, wherein through-holes through which the cooling medium can flow are formed in the partition plate that partitions the inside of the out-side tank.   3. The integrated heat exchanger according to claim 1, wherein the through hole is formed at a position closer to a heat exchanger core side. 4.

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