JP2007144502A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a heat exchanger which can be more rationally be provided with a connector. <P>SOLUTION: In the method for manufacturing the heat exchanger, the heat exchanger is formed by assembling members constituting a tube, a tank 400 and the connector 440 by using a tool, and brazing the assembled body in a furnace. The tank has a hole part communicating the connector and the connector is equipped with a block body as its constituting member. The block body is equipped with a passage for passing a medium, and a seating face 443 brazed to the tank. The passage of the block body is equipped with first opening parts 441b, 442a communicated with another passage and a second opening part communicated with the hole part of the tank. The second opening part exists on the seating face. When brazing in the furnace, the assembled body is installed in a prescribed posture and the tool is provided with a support 720 bearing the block body. Also, the block body is provided with a recessed part 447a which is a positioning means for the support. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method of manufacturing a heat exchanger that includes a tube that circulates a medium, a tank that connects ends of the tube, and a connector that is attached to the tank.

As heat exchangers such as radiators and evaporators used in the refrigeration cycle, a plurality of flat tubes and corrugated fins are alternately stacked to form a core, and the end of the tube is connected to a tank. What is known. The refrigerant is taken into the inside from a connector provided in the tank, flows through the tube while exchanging heat with heat transmitted to the core, and then discharged from the tank to the outside. This type of heat exchanger is manufactured by assembling each component and brazing the assembly in a furnace. As a connector, a connector formed by brazing a block body provided with a predetermined flow path to a tank is known, and its configuration is also disclosed in Patent Documents 1 to 3, for example.
JP 2002-213897 A JP 2004-309091 A International Publication No. 03/27594 Pamphlet

  In recent years, improvement of heat exchange efficiency of media, downsizing, weight reduction, ease of manufacture, and saving of installation space are important issues for heat exchangers. Based on this, a better configuration is required. Further, in brazing in a furnace, the assembly is generally laid down so that the longitudinal direction of the tube is horizontal, and the assembly is heated in that state. Here, although the connector is assembled with respect to the tank, depending on the mounting angle, the connector may become unstable in terms of supporting its own weight and may cause a positional shift. Such misalignment causes brazing defects, and therefore, a configuration that reliably prevents this is desired at the manufacturing site of heat exchangers. In particular, in the prior art, a process of temporarily fixing the connector by spot welding or the like is required before brazing, but such a process is very time-consuming and requires further rationalization. It has been. This invention is made | formed in view of this situation, The objective is to provide the manufacturing method of the heat exchanger which can provide a connector more rationally.

  The invention described in claim 1 of the present application is the manufacturing method of a heat exchanger comprising a tube that circulates a medium, a tank connected to an end of the tube, and a connector attached to the tank. The exchanger is formed by assembling the tube, the tank, and the members constituting the connector using a jig, and brazing the assembled body in a furnace, and the tank has a hole for communicating the connector. The connector includes a block body as a constituent member, and the block body includes a flow path for circulating the medium and a seating surface brazed to the tank, and the flow path of the block body Comprises a first opening communicated with another flow path and a second opening communicated with a hole of the tank, the second opening located on the seating surface, When brazing, the assembly is Placed in a constant posture, the jig is a method of manufacturing a heat exchanger arrangement having a support for supporting the block body.

  The invention described in claim 2 of the present application is the method for manufacturing a heat exchanger according to claim 1, wherein the block body is provided with a recess serving as a positioning means for the support.

  According to the method for manufacturing a heat exchanger of the present invention, the connector can be provided more rationally.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view showing a heat exchanger. FIG. 2 is a cross-sectional view showing a tank and a gas-liquid separator. FIG. 3 is a top cross-sectional view showing the main part of the heat exchanger. FIG. 4 is an exploded perspective view showing a main part of the heat exchanger. 5 and 6 are perspective views showing a gas-liquid separator connector. FIG. 7 is an explanatory view showing a state of brazing in the furnace of the heat exchanger.

  The heat exchanger 100 of this example is a condenser of an in-vehicle air conditioning refrigeration cycle mounted on an automobile, and a pair of tubes 200 stacked via fins 300 and a pair of ends connected to the tubes 200, respectively. A tank 400 is provided, and the medium (that is, the refrigerant) is cooled and condensed by heat transmitted to the tubes 200 and the fins 300. That is, the laminated portion of the tube 200 is a core that performs heat exchange of the medium.

  The pair of tanks 400 are provided with a first connector 410 serving as an inlet portion for flowing in the medium and a second connector 420 serving as an outlet portion for flowing out the medium. The medium flows through the first connector 410. After being introduced into the tank 400 and flowing through the tube 200 while exchanging heat, the second connector 420 discharges the outside. The first connector 410 is connected to another flow path for sending the medium from the compressor to the heat exchanger 100. The second connector 420 is connected to another flow path for sending the medium from the heat exchanger 100 to the expansion valve.

  The tank 400 is formed by partitioning the inside of the cylindrical body at a predetermined interval by a partition member 430, and the medium is configured to reciprocate between the tanks 400.

  Further, side plates 500 as reinforcing members are provided on the upper and lower sides of the layer formed of the tubes 200 and the fins 300, respectively. The end of each side plate 500 is supported by the tank 400.

  Further, one tank is provided with a gas-liquid separator connector 440 to which the gas-liquid separator 600 is attached. The gas-liquid separator 600 separates the medium into a gas layer and a liquid layer, and is detachably attached to the gas-liquid separator connector 440 provided in the tank 400 by screwing.

  In the process of flowing from the first connector 410 to the second connector 420, the medium is once sent from the tank 400 to the gas-liquid separator 600, and only the liquid layer is directed to the second connector 420. That is, the lower part of the present heat exchanger 100 is a subcooling part 100 a that cools the liquid layer medium separated by the gas-liquid separator 600.

  The tank 400 of this example is a semi-cylindrical first tank member 450 and second tank member 460 that are joined together to form a cylinder, and a partition is formed between the first tank member 450 and the second tank member 460. The member 430 is arranged and configured. The first tank member 450 is a plate material in which tube connection holes 451 are arranged at a constant pitch over the longitudinal direction. The tube 200 is inserted into the tube connection hole 451 and connected.

  The second tank member 460 is a plate material in which caulking pieces 461 are arranged on both edges in the longitudinal direction at a constant pitch, and the first tank member 450 is fitted between the both edges and the required caulking is performed. The piece 461 is deformed to hold the first tank member 450.

  The partition member 430 is a plate member whose edge is brazed to the inner peripheral surface of the cylinder, and a first protrusion 431 that protrudes from the hole 462 provided in the second tank member 460 to the outside of the cylinder, and the first And a step portion 432 against which an edge of the tank member 450 is abutted. The partition member 430 is positioned with respect to the cylindrical body by inserting the convex portion into the hole portion 462. The second tank member 460 is provided with a first connector 410 and a second connector 420.

  The gas-liquid separator connector 440 of this example has a block body 447 as its constituent member. The block body 447 is a member created by processing a forged member or an extruded member, and includes a first flow path 441 for circulating the medium from the tank 400 to the gas-liquid separator 600, and the medium from the gas-liquid separator 600. A second flow path 442 that flows to the tank 400, a seating surface 443 that is joined to the outer surface of the tank 400 by brazing, and a bolt insertion portion 444 for screwing the gas-liquid separator 600 are provided. The outlet opening 441b of the first channel 441 and the inlet opening 442a (the first opening in the claims) of the second channel 442 are connected to the channel of the gas-liquid separator 600 as another channel. The The inlet opening 441a of the first flow path 441 and the outlet opening 442b of the second flow path 442 (second opening in the claims) are located on the seating surface 443, and the second tank member 460. Are connected to the respective holes 463 provided at the main points. In addition, the inlet opening 441 a of the first flow path 441 and the outlet opening 442 b of the second flow path 442 illustrated in the figure are boss-like portions that protrude from the seating surface 443 into the tank 400. The seating surface 443 is expanded by a plate-like flange portion 445 along the outer surface of the cylindrical body, and is configured to ensure a relatively large brazing area.

  The seating surface 443 is provided with a fitting portion 446 for fitting the convex portion 431 of the partition member 430, and the block body 447 is positioned using the convex portion 431 of the partition member 430.

  Specifically, the partition member 430 is disposed on the second tank member 460, and the fitting portion 446 having a hole shape or a depression shape is fitted to the convex portion 431 of the partition member 430 protruding from the hole portion 462, and the partition member 430 is inserted. The second tank member 460 and the block body 447 are assembled. Here, if the convex part 431 is crimped, it is also possible to improve the assembling strength thereof. The second tank member 460 is assembled with the first tank member 450 after the gas-liquid separator connector 440 is assembled in this manner. The partition member 430 that uses the convex portion 431 for positioning the gas-liquid separator connector 440 includes an inlet opening 441a of the first channel 441 and the second channel 442 in the gas-liquid separator connector 440 inside the cylinder. The outlet part 442b is cut off.

  The gas-liquid separator 600 includes an introduction pipe 610 connected to the outlet opening 441b of the first flow path 441 in the gas-liquid separator connector 440 and an opening 442a of the second flow path 442 in the gas-liquid separator connector 440. And an outlet 620 to be connected. The medium flows from the tank 400 through the gas-liquid separator connector 440, is sent to the introduction pipe 610 of the gas-liquid separator 600, rises up the introduction pipe 610, and is ejected into the gas-liquid separator 600. The ejected medium is separated into a gas layer and a liquid layer when the liquid layer accumulates below the inside of the gas-liquid separator 600. The liquid layer medium accumulated in the lower portion of the gas-liquid separator 600 flows through the connector from the outlet 620 and is sent back to the tank 400, and further flows through the tube 200 while exchanging heat to the second connector 420. Head. A desiccant layer 630 and a filter 640 are disposed inside the gas-liquid separator 600, and moisture and impurities contained in the medium are removed by passing through the medium.

Each member constituting the tube 200, the fin 300, the tank 400, the side plate 500, the first connector 410, the second connector 420, and the gas-liquid separator connector 440 is formed of aluminum or an aluminum alloy, and is a heat exchanger. 100 is manufactured by assembling each member integrally and brazing the assembly by heat treatment in a furnace. At the time of brazing in the furnace, a brazing material and a flux are provided in advance at the main points of each member.
The gas-liquid separator 600 is detachably attached to the gas-liquid separator connector 440.

  When the heat exchanger 100 is brazed in the furnace, the assembly is installed in a predetermined posture. Specifically, the assembly is laid down so that the longitudinal direction of the tube 200 is horizontal, and the assembly is heated in that state. As shown in FIG. 7, the jig for assembling the constituent members of the heat exchanger 100 is formed by installing a core jig 710 on a base jig 700, and a core formed by stacking tubes 200 is placed on the core jig 710. Is done.

  In the case of this example, the base jig 700 is provided with a pin-shaped or plate-shaped support 720 that supports the block body 447. The block body 447 is fixed and brazed at a predetermined mounting angle by positioning the seating surface 443 with respect to the tank 400 and supporting its own weight by the support body 720. According to such a configuration, the displacement of the block body 447 during brazing can be reliably prevented, and the gas-liquid separator connector 440 can be accurately provided. In particular, the block body 447 need not be temporarily fixed by spot welding or the like. In addition, as shown in FIG. 8, the attitude | position and attachment angle of the block body 447 can be arbitrarily set as needed.

  As described above, the heat exchanger manufacturing method of this example has an excellent effect in that the gas-liquid separator connector is accurately provided. It should be noted that the configuration of this example can be modified as appropriate within the technical scope described in the claims, and is of course not limited to that illustrated in the drawings. For example, the present invention can be applied to brazing the first connector and the second connector. In particular, the configuration of this example is extremely effective when brazing a relatively large block body or when brazing a block body whose center of gravity protrudes from the upper part of the tank during brazing.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In the case of this example, the block body 447 is provided with a concave portion 447 a serving as a positioning means for the support body 720. The other basic configuration is the same as the specific example described above.

  By providing such a recess 447a in the block body 447, it is possible to prevent the displacement of the block body 447 more reliably, and to further improve the brazing reliability. In addition, as shown in FIG. 11, the position and shape of the recessed part 447a can be arbitrarily set as needed. The illustrated block body 447 is formed by processing an extruded member, and the concave portion 447a is a groove provided simultaneously with extrusion molding. According to such a configuration, there is an advantage that the processing step of the recess 447a can be omitted.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used as a method for manufacturing a heat exchanger such as a refrigeration cycle radiator, evaporator, internal heat exchanger, automobile radiator, or heater core.

It is a front view which concerns on the Example of this invention and shows a heat exchanger. It is sectional drawing which concerns on the Example of this invention and shows a tank and a gas-liquid separator. It is an upper surface sectional view showing an important section of a heat exchanger concerning an example of the present invention. It is an exploded perspective view which shows the principal part of the heat exchanger according to the Example of this invention. It is a perspective view which shows the connector for gas-liquid separators concerning the Example of this invention. It is a perspective view which shows the connector for gas-liquid separators concerning the Example of this invention. It is explanatory drawing which shows the state in the brazing in a furnace of a heat exchanger in the Example of this invention. It is explanatory drawing which shows the state in the brazing in a furnace of a heat exchanger in the Example of this invention. It is explanatory drawing which shows the state in the brazing in a furnace of a heat exchanger in the Example of this invention. It is a perspective view which shows the connector for gas-liquid separators concerning the Example of this invention. It is explanatory drawing which shows the state in the brazing in a furnace of a heat exchanger in the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Heat exchanger 100a Subcool part 200 Tube 300 Fin 400 Tank 410 1st connector 420 2nd connector 430 Partition member 431 Convex part 432 Step part 440 Gas-liquid separator connector 441 1st flow path 441a 1st flow path inlet opening part 441b First channel outlet opening 442 Second channel 442a Second channel outlet opening 442b Second channel inlet opening 443 Seating surface 444 Bolt insertion portion 445 Flange portion 446 Fitting portion 447 Block body 447a Recess 450 First tank member 451 Tube connection hole 460 Second tank member 461 Caulking piece 462 Hole portion 463 Hole portion 464 Hole portion 500 Side plate 600 Gas-liquid separator 610 Introduction pipe 620 Outlet 630 Desiccant layer 640 Filter 700 Base jig 710 Core jig 720 Support

Claims (2)

In a method of manufacturing a heat exchanger comprising a tube that circulates a medium, a tank that connects the ends of the tube, and a connector that is attached to the tank,
The heat exchanger is formed by assembling members constituting the tube, the tank, and the connector using a jig, and brazing the assembly in a furnace,
The tank has a hole communicating the connector,
The connector includes a block body as a constituent member thereof,
The block body includes a flow path for circulating the medium, and a seating surface brazed to the tank,
The flow path of the block body includes a first opening communicating with another flow path and a second opening communicating with the hole of the tank, and the second opening is formed on the seating surface. Position to,
At the time of brazing in the furnace, the assembly is installed in a predetermined posture,
A method of manufacturing a heat exchanger, wherein the jig is provided with a support for supporting the block body.   The method for manufacturing a heat exchanger according to claim 1, wherein the block body is provided with a recess serving as a positioning means for the support.

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