JP2006207377A - Integration type heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress thermal effect on a supercooling part of a condenser for air conditioning in engine high load, in an integration type heat exchanger formed by integrating the condenser for air conditioning having a supercooling part with an engine cooler. <P>SOLUTION: Tubes 24 are laminated on a radiator core part 21 of a cooler 20 for an engine. Widths of tubes 24A out of the tubes 24 positioned to be opposed to the supercooling part 50 of the condenser 30 for air conditioning are narrower than widths of the tubes 24 disposed to other positions. Since the heat is made thereby unsusceptible to transmission from the tubes 24A, through which engine cooling water flows, to the tubes 24 adjacent to the tubes 24A, the thermal effect on the supercooling part 50 is suppressed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an integrated heat exchanger in which an engine cooler and an air conditioning condenser are integrated.

  Conventionally, an integrated heat exchanger in which an engine cooler (radiator) and an air conditioning condenser (condenser) are integrated is known. This integrated heat exchanger can be reduced in size, weight, and number of parts compared to the case where separate parts are arranged, occupies less space in the engine room, and can reduce assembly man-hours and costs. It has characteristics such as becoming.

As a conventional example of this type of integrated heat exchanger, an air conditioning condenser is arranged and connected to the front surface (cooling air inflow side) of the engine cooler, and the fins are continuously formed integrally. (See Patent Document 1).
Japanese Patent No. 2756255

  In the above conventional example, notches and slits are provided in continuous fins so as to suppress the heat effect of the heat exchangers arranged at the front and rear. However, when the engine is heavily loaded, the temperature of the engine cooling water rises, which may affect the air conditioning condenser side. In the current air conditioning system, a subcooling unit for cooling the liquefied air conditioning refrigerant is provided in a part of the air conditioning condenser. Therefore, if this part is affected by heat, the air conditioning refrigerant can be supercooled. There was a problem that the air conditioner performance was degraded.

  An object of the present invention is to provide an integrated heat exchanger that can suppress the thermal influence on the supercooling section of the air conditioning condenser when the engine is heavily loaded.

  In order to solve the above problems, an invention according to claim 1 is an air conditioner having an engine cooler having a radiator core portion in which a plurality of tubes and fins are laminated, and a capacitor core portion in which the plurality of tubes and fins are laminated. A condenser for air conditioning and a condenser for air conditioning composed of a supercooling part having a supercooling core part in which a plurality of tubes and fins are laminated, and are laminated on the radiator core part, the condenser core part and the supercooling part. In the integrated heat exchanger in which the fins are integrally formed, of the tubes stacked on the radiator core portion of the engine cooler, the tubes provided at positions facing the supercooling portion of the air conditioning condenser An integrated heat exchanger characterized in that the width is narrower than the width of a tube provided at another position.

  According to a second aspect of the present invention, in the first aspect, the tube having a narrow width is arranged such that a rear end portion in the width direction substantially coincides with a rear surface of the engine cooler.

  According to a third aspect of the present invention, in the first or second aspect, the fin is provided with a heat insulating means.

  According to the invention of claim 1, since the tube width of the tube disposed at the position facing the supercooling portion is made narrower than the tube width of the other tube, the distance between the adjacent tubes is separated at the facing position, Even if the engine coolant temperature rises when the engine is heavily loaded, it becomes difficult for heat to be transferred from the narrowed tube to the adjacent tube, and the thermal effect on the supercooled part when the engine is heavily loaded is suppressed. It is possible to prevent a decrease in the performance of the air conditioner. In addition, by narrowing the tube width, the flow rate of the engine cooling water flowing inside increases, so that the temperature of the engine cooling water can be lowered.

  According to the second aspect of the present invention, the rear end portion in the width direction of the narrow tube is arranged so as to substantially coincide with the back surface of the engine cooler, so that the tube of the supercooling portion and the engine cooler are arranged. Since the distance from the tube is further increased and heat is more difficult to be transferred from the narrowed tube to the adjacent tube when the engine is heavily loaded, it is possible to further suppress the thermal influence on the supercooling section.

  According to the invention of claim 3, by providing heat insulation means on the fin, heat transfer from the narrowed tube to the adjacent tube is further reduced, so that it is possible to further suppress the thermal influence on the supercooling section. It becomes possible.

  Hereinafter, the best mode for carrying out the integrated heat exchanger according to the present invention will be described.

  FIG. 2 is a perspective view showing the overall configuration of the integrated heat exchanger according to this embodiment, and FIG. 3 is a front view of the radiator core portion.

  As shown in FIG. 2, the integrated heat exchanger 10 according to this embodiment includes an engine cooler 20 and an air conditioning condenser 30, which are integrally connected. Among these, the condenser 30 for air conditioning is arrange | positioned upstream from the inflow direction of the cooling air 100, and the cooler 20 for engines is arrange | positioned downstream.

  The engine cooler 20 includes a radiator core portion 21 in which a plurality of tubes (not shown) and cooling fins are stacked, and radiator tanks 22 and 23 disposed at both ends of the radiator core portion 21.

  The air-conditioning condenser 30 includes an air-conditioning condensing unit 40 that cools the gaseous air-conditioning refrigerant to a liquid state, and a supercooling unit 50 that further cools the air-conditioning refrigerant liquefied by the air-conditioning condensing unit 40. These are stacked in the vertical direction.

  The air conditioning condensing unit 40 includes a capacitor core unit 41 in which a plurality of tubes (not shown) and cooling fins are stacked, and capacitor tanks 42 and 43 disposed at both ends of the capacitor core unit 41. The air conditioning condenser 40 is provided with a liquid tank (not shown).

  The supercooling unit 50 includes a supercooling core unit 51 in which a plurality of tubes (not shown) and cooling fins are stacked, and supercooling tanks 52 and 53 disposed at both ends of the supercooling core unit 51. Yes.

  Next, the configuration of each core unit will be described with reference to FIG. Here, the radiator core portion 21 will be described as a representative, but the basic structure is the same for the other core portions. In FIG. 2, the reference numerals in parentheses indicate the corresponding parts in the air conditioning condensing unit 40 and the supercooling unit 50.

  The radiator core portion 21 is formed by alternately stacking tubes 24 through which engine cooling water flows and fins 25 formed in a corrugated shape, and arranging a side plate 26 on the outer side of the outermost fins 25. Yes, it is brazed together. Of these, the tubes 24 are stacked in parallel in the height direction with a space for cooling air flowing between adjacent tubes, and corrugated fins 25 are disposed in the gaps between the tubes 24. ing. The fin 25 is integrally formed as a fin common to the radiator core portion 21, the capacitor core portion 41 and the supercooling core portion 51.

  The radiator tanks 22 and 23 are disposed at both ends of the radiator core portion 21, that is, at each end portion 24a in the longitudinal direction of each tube 24, and an engine cooling water flow path 27 is formed therein. Further, tube insertion holes (not shown) for inserting the tubes 24 are formed on the side surfaces of the radiator tanks 22 and 23, and the end portions 24a of the tubes 24 are joined by brazing. Thereby, the flow path 27 formed in the radiator tanks 22 and 23 and the internal passages of the tubes 24 communicate with each other. Note that illustrations and descriptions of accessory parts such as an engine cooling water inlet pipe and outlet pipe, and a divider plate for partitioning the tank interior are omitted.

  Next, the tube shape and arrangement of the radiator core portion 21, which is a characteristic configuration of the present embodiment, will be described with reference to FIG. 1 which is a cross-sectional view taken along the line AA of FIG. 2 (fins are omitted in FIG. 1). To do).

  As shown in FIG. 1A, equal-width tubes 24 are arranged at equal intervals in the condenser core part 41 of the air-conditioning condensing part 40 and the supercooling core part 51 of the supercooling part 50. On the other hand, in the radiator core portion 21 of the engine cooler 20, the tube 24 having the same width as the capacitor core portion 41 is disposed at a position (reference numeral 110) facing the condenser core portion 41 of the air conditioning condenser 40. A tube 24 </ b> A narrower than the tube 24 is disposed at a position (reference numeral 120) that faces the 50 supercooling core portions 51. In FIG. 1A, the tube 24A is arranged so that the center in the width direction of the tube 24A and the center in the width direction of the tube 24 coincide.

  According to the configuration of the present embodiment, in the radiator core portion 21, the tube width of the tube 24 </ b> A disposed at a position facing the supercooling core portion 51 of the supercooling portion 50 is the tube disposed in the supercooling core portion 51. Since the tube width is narrower than 24, the distance between the tube 24 disposed in the supercooling core portion 51 and the tube 24A disposed in the radiator core portion 21 can be increased. Therefore, even if the temperature of the engine cooling water flowing through the tube 24A at the time of high engine load increases, it becomes difficult for heat to be transferred from the tube 24A to the adjacent tube 24, and the thermal influence on the supercooling unit 50 can be suppressed. Even when the engine is heavily loaded, the performance of the air conditioner can be prevented from degrading.

  Further, by narrowing the tube width of the tube 24A, the flow rate of the engine cooling water flowing inside increases, and therefore the temperature of the engine cooling water can be lowered.

  In the above embodiment, the width of the tube of the radiator core portion 21 disposed at the position facing the condenser core portion 41 of the air conditioning condenser 40 is the same as that of the tube 24 of the condenser core portion 41. However, the present invention is not limited to this, and the tube width of the radiator core portion 21 and the tube width of the capacitor core portion 41 may be different.

  In the above embodiment, the example in which the center in the width direction of the tube 24A and the center in the width direction of the tube 24 are matched is shown. However, as shown in FIG. However, the tube 24A may be disposed so as to substantially coincide with the back surface of the radiator core portion 21 (the engine cooler 20).

  In the case of the above configuration, since the distance between the tube 24 of the supercooling core portion 51 and the tube 24A of the radiator core portion 21 can be further increased, the tube 24A is moved to the adjacent tube 24 when the engine is heavily loaded. Heat becomes more difficult to be transmitted, and the thermal influence on the supercooling unit 50 can be further suppressed.

  In the above embodiment, heat insulation means such as notches and slits (not shown) may be provided on the fins 25 that are integrally formed continuously. In this case, since the heat dissipation effect of the fins 25 can be increased, it is possible to further reduce the heat transfer from the tube 24A to the adjacent tube 24 and further suppress the thermal influence on the supercooling unit 50. .

  As described above, in the integrated heat exchanger 10 according to the present embodiment, the tube width of the tube 24 </ b> A disposed at the position facing the supercooling core portion 51 of the supercooling portion 50 is set to the tube of another tube 24. Since it is narrower than the width, even if the distance between the adjacent tube 24 and the tube 24A is increased at the opposite position and the temperature of the engine coolant rises at the time of high engine load, heat is transferred from the tube 24A to the adjacent tube 24. Since the transmission is difficult and the thermal influence on the supercooling unit 50 is suppressed, it is possible to prevent the performance of the air conditioner from being deteriorated. Further, by narrowing the tube width of the tube 24A, the flow rate of the engine cooling water flowing inside increases, and therefore the temperature of the engine cooling water can be lowered (effect of claim 1).

  In particular, when the tube 24A is arranged so that the rear end portion in the width direction of the tube 24A substantially coincides with the back surface of the radiator core portion 21, the tube 24 of the supercooling core portion 51 and the tube 24A of the radiator core portion 21 Since the heat is more difficult to be transferred from the tube 24A to the adjacent tube 24 when the engine is heavily loaded, the influence of heat on the supercooling section 50 can be further suppressed (effect of claim 2).

  Furthermore, by providing heat insulation means such as notches and slits in the fin 25, the heat dissipation effect of the fin 25 is increased, and heat transfer from the tube 24A to the adjacent tube 24 is reduced, so that the supercooling unit 50 It is possible to further suppress the thermal effect of (the effect of claim 3).

(A), (b) is the sectional view on the AA line of FIG. (A) is a figure which shows the example arrange | positioned so that the center of the width direction of the tube which narrowed the width | variety and the center of the width direction of another tube may correspond. (B) is a figure which shows the example arrange | positioned so that the rear-end part of the width direction of the tube which narrowed the width | variety may correspond with the back surface of the cooler for engines. The perspective view which shows the whole structure of the integrated heat exchanger concerning an Example. The front view of a radiator core part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Integrated heat exchanger 20 ... Engine cooler 21 ... Radiator core part 22, 23 ... Radiator tank 24, 24A ... Tube 25 ... Fin 30 ... Air conditioning condenser 40 ... Air conditioning condenser part 41 ... Condenser core part 42 , 43 ... Capacitor tank 50 ... Supercooling part 51 ... Supercooling core part 52, 53 ... Supercooling tank 100 ... Cooling air

Claims (3)

An engine cooler (20) having a radiator core (21) in which a plurality of tubes and fins are stacked, and an air conditioning condenser (50) having a capacitor core (41) in which a plurality of tubes and fins are stacked. And an air conditioning condenser (30) having a supercooling part (50) having a supercooling core part (51), and the radiator core part (21), the condenser core part (41), and the supercooling part In the integrated heat exchanger in which the fins stacked in (51) are integrally formed,
Of the tubes (24) stacked on the radiator core (21) of the engine cooler (20), the tubes are provided at positions facing the supercooling portion (50) of the air conditioning condenser (30). An integrated heat exchanger characterized in that the width of (24a) is narrower than the width of the tube (24) provided at another position.   2. The integrated type according to claim 1, wherein the tube (24 a) having a narrow width is arranged so that a rear end portion in a width direction thereof substantially coincides with a rear surface of the engine cooler (20). Heat exchanger. The integrated heat exchanger according to any one of claims 1 and 2, wherein the fin (25) is provided with a heat insulating means.

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