JP2006207944A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To heighten the performance of a heat exchanger and to make it in a compact size. <P>SOLUTION: This heat exchanger 11 includes a condenser 13 and a radiator 12 which are arranged one behind the other, wherein a core 21 having a large longitudinal width and a core 22 having a small longitudinal width are connected in series to the radiator 12 through an intermediate tank 23, and a part of the condenser 13 and the core 22 having a small longitudinal width of the radiator 12 are disposed to overlap each other in the longitudinal direction. Preferably fan 14 is disposed in parallel to the core 21 having a large longitudinal width of the radiator 12, and another fan 15 is disposed in parallel not to overlap the radiator 12 of the condenser 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat exchanger, and more particularly, to a heat exchanger in which a condenser and a radiator are arranged at the front and back.

Conventionally, a vehicle such as an automobile is provided with a radiator 1 for cooling the engine as shown in FIG. 3, and a condenser 2 for air conditioning equipment is provided in front of the radiator 1. Yes. Further, a fan 3 is provided on the rear passenger compartment side of the radiator 1, and a forced airflow is generated by the fan 3 from the front to the rear (in the direction of the arrow in FIG. 3). Then, the forced air flow generated by the operation of the fan 3 and the natural air flow generated by the traveling of the vehicle sequentially pass through the condenser 2 and the radiator 1 from the front, respectively, so that the condenser 2 and the radiator 1 are cooled ( For example, see Patent Document 1).
Japanese Laid-Open Patent Publication No. 57-157721

  However, in the above-described conventional heat exchanger, the condenser 2 is disposed in front of the radiator 1, and air that has passed through the condenser 2 and has reached a high temperature flows into the radiator 1. Therefore, there is a problem that a sufficient temperature difference between the cooling water flowing through the radiator 1 cannot be secured and the cooling performance of the radiator 1 is lowered.

  In addition, since air passes through both the condenser 2 and the radiator 1, there is a problem that pressure loss increases and it is difficult to make the heat exchanger compact.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a heat exchanger that can improve the performance of a radiator and can be made compact.

  The present invention is a heat exchanger in which a condenser and a radiator are arranged at the front and rear, and a thick core and a thin core having a front and rear width are connected in series to the radiator via an intermediate tank, and the condenser And a portion of the radiator and the thin core in the front-rear width are arranged so as to overlap each other.

  Preferably, a fan is disposed in parallel with a thick core in the front and rear width of the radiator, and another fan is disposed in parallel with a portion of the capacitor that does not overlap the radiator.

  According to the present invention, since the condenser is not disposed on the thick core side of the radiator, the temperature difference between the air passing through the core and the cooling water flowing through the core can be sufficiently secured. The cooling performance of the radiator can be enhanced.

  Further, since there is no capacitor on the thick core side of the radiator in the front-rear width, a thick core in which an allowable value of air resistance is added to the air resistance of the capacitor can be used. Therefore, it is possible to give a sufficient amount of heat radiation to the core side with a thick front and rear width, and as a result, the overall length of the radiator can be reduced, and the heat exchanger can be made compact, etc. An excellent effect can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2. Here, FIG. 1 is a schematic plan view showing a heat exchanger according to an embodiment of the present invention, and FIG. 2 is a front view showing a radiator of the heat exchanger.

  The heat exchanger 11 is provided in a vehicle such as an automobile. The heat exchanger 11 is a crossflow type radiator 12, a crossflow type air conditioner condenser 13, and the radiator 12 and the condenser 13 from the front to the rear. It is comprised from the 1st fan 14 and the 2nd fan 15 which generate a forced airflow toward (in the arrow direction of FIG. 1).

  The radiator 12 includes a core 16, and an inlet side tank 17 and an outlet side tank 18 provided in a vertical posture on both the left and right sides of the core 16, and a cooling water inlet 19 is provided above the inlet side tank 17. A cooling water outlet 20 is provided at the lower part of the outlet side tank 18.

  The core 16 is divided into a first core 21 having a large front-rear width and a second core 22 having a small front-rear width. The first core 21 and the second core 22 are connected in series via an intermediate tank 23 provided vertically. It is connected to the. Each of the first core 21 and the second core 22 includes a plurality of tubes 24 arranged in parallel horizontally and fins 25 provided around each tube 24. Reinforcing plates 26 and 27 are provided above and below 22 respectively. When such a radiator 12 is manufactured, the first core 21 and the second core 22 are separately manufactured, and then the first core 21 and the second core 22 are integrally brazed to the intermediate tank 23. ing.

  A portion of the capacitor 13 (the left half in FIG. 1) overlaps the front and rear of the second core 22 having a thin front and rear width of the radiator 12, and the other portion (the right half in FIG. 1) does not overlap the radiator 12. 12 in parallel. The capacitor 13 includes a core 28 and headers 29 provided in a vertical posture on both the left and right sides of the core 28. Each core 28 is provided with a tube (not shown). Fins (not shown) are disposed around the tube.

  The first fan 14 is disposed in parallel behind the first core 21 of the radiator 12, and the second fan 15 is disposed in parallel behind the portion of the capacitor 13 that does not overlap the radiator 12.

  Thus, since the capacitor 13 is not disposed on the first core 21 side, a thick core in which the allowable value of the air resistance is added to the air resistance of the capacitor 13 can be used for the first core 21. . Therefore, a sufficient heat radiation amount can be provided on the first core 21 side, and as a result, the overall length L of the radiator 12 can be reduced, and the heat exchanger 11 can be made compact.

  Next, the operation of the heat exchanger 11 according to the present embodiment will be described.

  Cooling water that has absorbed heat from the vehicle engine and has reached a high temperature flows from the cooling water inlet 19 through the inlet-side tank 17 through the tubes 24 of the first core 21, and passes through the intermediate tank 23 to pass through the second tank 24. After flowing through each tube 24 of the two cores 22, it passes through the outlet side tank 18 and is returned to the engine from the cooling water outlet 20. On the other hand, the refrigerant that has absorbed the heat in the passenger compartment and has become a high temperature and high pressure flows into the tube of the core 28 from one header 29 in the condenser 13, and then returns to the air conditioning equipment from the other header 29.

  When the cooling water or the refrigerant reaches a predetermined temperature or pressure, the first fan 14 and the second fan 15 are driven, and a forced airflow is generated from the front toward the rear. As the vehicle travels, a natural airflow is generated in the same direction as the forced airflow. As a result, the cooling water flowing through each tube 24 of the first core 21 is cooled by the forced air flow and the natural air flow generated by the first fan 14, and the cooling water flowing through each tube 24 of the second core 22 is Cooled by the natural airflow. On the other hand, the refrigerant flowing through each tube of the condenser 13 is cooled by the forced air flow generated by the second fan 15 and the natural air flow.

  Thus, since the outside air flows directly into the first core 21 side of the radiator 12 without passing through the capacitor 13, a sufficient temperature difference between the outside air and the cooling water can be ensured. Moreover, since the front-rear width of the second core 22 is thin and the air resistance is reduced, a sufficient amount of outside air also passes through the second core 22 side. Therefore, the cooling performance of the radiator 12 can be sufficiently enhanced.

  In addition, in the said embodiment, although the heat exchanger 11 installed in a vehicle was demonstrated, this is only a mere illustration and that this invention is applicable also to the heat exchanger of another use. Needless to say.

It is a schematic plan view which shows the heat exchanger which concerns on embodiment of this invention. It is a front view which shows the radiator of the heat exchanger which concerns on embodiment of this invention. It is a schematic plan view which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Heat exchanger 12 Radiator 13 Capacitor 14 1st fan 15 2nd fan 21 1st core 22 2nd core 23 Intermediate tank

Claims (2)

A heat exchanger in which a condenser and a radiator are arranged at the front and rear,
A thick core and a thin core are connected to the radiator in series via an intermediate tank, and a part of the capacitor and a thin core having a thin front and back width are arranged to overlap each other. A heat exchanger characterized by having 2. The heat exchanger according to claim 1, wherein a fan is disposed in parallel with a thick core in the front-rear width of the radiator, and another fan is disposed in parallel with a portion of the condenser that does not overlap the radiator.

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