JP2009121708A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger capable of suppressing significant increase of ventilation resistance of a gas by allowing condensate water generated when the heat exchanger is used as a cooler of the gas, to smoothly flow down without increasing a component member, and improving heat exchanging performance. <P>SOLUTION: In this heat exchanger comprising a pair of header pipes 11, 12 horizontally opposite to each other one above the other, a plurality of flat heat exchange tubes 13A communicated and connected with the header pipes 11, 12 at upper ends and lower ends and arranged in parallel with each other at their flat planes, and heat exchanging fins 14A respectively closely disposed in a clearance between the flat heat exchange tubes 13, the heat exchange fin 14A is bent into the waveform continued in the vertical direction of the flat heat exchange tube 13, and formed on the down grade toward the approximate center of a width of a flat plane of the flat heat exchange tube 13A, and a clearance 17A for draining is formed along the approximate center of the width of the flat plane of the flat heat exchange tube 13A. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fin-and-tube heat exchanger used in, for example, an air conditioner, a refrigerator, and the like, and in particular, a pair of header pipes that are horizontally opposed to each other, and a plurality of communication pipes connected to the header pipes. The present invention relates to a heat exchanger of a type including a flat heat exchange tube and a heat exchange fin closely interposed in a gap between the flat heat exchange tubes.

  Generally, when a heat exchanger is used as a gas cooler, condensed water adheres to the surface of heat exchange fins or the outer surface of flat heat exchange tubes. In a state where the condensed water adheres without smoothly flowing down, the ventilation resistance of the gas to be cooled is greatly increased, and the heat exchange efficiency is lowered.

  Conventionally, it is a heat exchanger using a flat heat exchange pipe, and it is used as a gas cooler, and devised to smoothly flow down the condensed water adhering to the surface of the heat exchange fins and the outer surface of the flat heat exchange pipe The heat exchanger which was made is disclosed (for example, refer patent document 1).

  This heat exchanger is closely attached to a pair of header pipes that face each other vertically, a plurality of flat heat exchange pipes that are connected to the header pipes at both left and right ends, and a gap between the flat heat exchange pipes. Heat exchange fins.

In this heat exchanger, the flat heat exchange tubes are arranged on the left and right and the flat heat on the left and right sides are arranged to smoothly flow down the condensed water adhering to the surface of the heat exchange fins and the outer surface of the flat heat exchange tubes. The exchange pipes are provided so as to be gently inclined toward each other, and the heat exchange fins are further bent and inclined in a wave shape continuous in the gap direction between adjacent flat heat exchange pipes, and the flat heat exchange pipes Laminated in the axial direction.
JP 2007-183088 (Claims, FIG. 1)

  However, in the one described in Patent Document 1, the heat exchange fins are bent and inclined in a wave shape continuous in the gap direction between adjacent flat heat exchange tubes, and are laminated in the tube axis direction of the flat heat exchange tubes. Therefore, there is a problem that the air resistance basically increases because the gas to be cooled, that is, the air proceeds in a wave shape and ventilation is performed. Moreover, since what is described in Patent Document 1 is a structure in which flat heat exchange tubes are provided in two rows and inclined, there is a problem that the structure is complicated and large.

  The present invention has been made in view of the above circumstances, and without increasing the number of components, the condensed water generated when the heat exchanger is used as a gas cooler smoothly flows down, and the gas ventilation resistance is greatly increased. It is an object of the present invention to provide a heat exchanger that can suppress heat and improve heat exchange performance.

  In order to solve the above-described problem, the invention described in claim 1 is a pair of header pipes that vertically face each other, and a plurality of flat heats that are connected to the header pipes in such a manner that their upper and lower ends are connected to each other in parallel. A heat exchanger comprising: an exchange pipe; and a heat exchange fin that is in close contact with the gap between the flat heat exchange pipes, wherein the heat exchange fins are wavy in the vertical direction of the flat heat exchange pipe Are formed in a downward slope toward the center of the flat surface of the flat heat exchange tube, and a drainage gap is formed along the center of the flat surface of the flat heat exchange tube. It is characterized by being provided.

  By configuring in this way, the flat surface of the flat heat exchange tube is a vertical surface, is formed in a downward slope toward the approximate center of the width of the flat surface of the flat heat exchange tube, and the flat surface of the flat heat exchange tube Since the gap for drainage is provided along substantially the center of the width, the condensed water adhering to the flat surface of the flat heat exchange pipe smoothly flows down the flat surface and moves to the heat exchange fin. Smoothly flows in the direction of the drainage gap and flows down through the drainage gap. In addition, since the heat exchange fins are formed in a wave shape that continues vertically, air can easily pass through the passages of the heat exchange fins, pressure loss is reduced, and heat exchange performance can be improved.

  In the present invention, the heat exchange fin can be formed by a pair of fin halves that are arranged on the left and right sides so as to provide the drain gap so as to be approximately aligned with the center of the flat surface of the flat heat exchange tube. (Claim 2).

  By comprising in this way, the heat exchange fin can be formed by assembling the fin halves formed in the same shape.

  In the present invention, it is preferable that the flat heat exchange tube includes a fin ridge for positioning the fins along substantially the center of the width of the flat surface.

  By comprising in this way, the width | variety center of a flat heat exchange tube and the width | variety approximate center of a heat exchange fin can be match | combined easily and correctly.

  In this invention, the heat exchange fin is composed of a single fin body that is continuous in a wavy shape in the vertical direction, and has a notch extending from approximately the center of the width of one side bent portion of the fin body to the vicinity of the other side bent portion. The connecting portion is left in the center of the width of the other side bent portion, and both sides of the connecting portion may be bent so as to rise and incline along the flat surface of the flat heat exchange tube. .

  By comprising in this way, a heat exchange fin can be formed from one board | plate material.

  In addition, in the present invention, the heat exchange fin may protrude outward from the flat heat exchange tube, and the upstream area of the cooled gas may be larger than the downstream area. Good (Claim 5).

  By configuring in this way, the heat exchange fin can be provided with a flat heat exchanger and a non-contact protrusion, and the surface area can be increased. Therefore, when the heat exchanger according to the present invention is used for an outdoor unit during heating operation Can delay frost formation.

  According to this invention, since it is configured as described above, the following excellent effects can be obtained.

  (1) According to the first aspect of the present invention, since the condensed water generated when the heat exchanger is used as a gas cooler can be smoothly flowed out without increasing the number of components, the gas ventilation resistance is reduced. The heat exchange performance can be improved by suppressing a significant increase, that is, by reducing the pressure loss of the air flowing through the ventilation path.

  (2) According to the invention described in claim 2, since the fin half is easy to manufacture and the flat heat exchange tube can be easily assembled to the flat surface, the manufacturing cost can be further reduced in addition to the above (1). Can be achieved.

  (3) According to the invention described in claim 3, since the approximate center of the width of the flat heat exchange tube and the approximate center of the width of the heat exchange fin can be matched easily and accurately, (1), (2) In addition, the assembly time can be further reduced and the production cost can be reduced.

  (4) According to the invention described in claim 4, since the heat exchange fin can be formed from a single plate material, in addition to the above (1), the heat exchange fin and the substantially central width of the flat heat exchange tube are further provided. It is possible to easily and accurately match the approximate center of the width, shorten the assembling time, and reduce the manufacturing cost.

  (5) According to the invention described in claim 5, since the heat exchange fin is provided with the flat heat exchanger and the non-contact protrusion, and the surface area can be increased, in addition to the above (1) to (4), Blockage of the ventilation passage due to frost formation can be prevented or delayed.

  The best mode for carrying out the present invention will be described below in detail with reference to the accompanying drawings.

<First Embodiment>
Fig.1 (a) is a schematic perspective view which shows the heat exchanger of 1st Embodiment based on this invention, FIG.1 (b) is Ib-Ib sectional drawing in Fig.1 (a).

  In this heat exchanger 10, a lower header pipe 11 and an upper header pipe 12 face each other in parallel and horizontally, and upper and lower ends of a plurality of flat heat exchange tubes 13A are connected to the header pipes 11 and 12 in communication. ing. The plurality of flat heat exchange tubes 13A are arranged in parallel with the flat surfaces being parallel to each other. In the gap between the flat heat exchange tubes 13A, heat exchange fins 14A are provided in close contact with the flat heat exchange tubes 13A. The lower header pipe 11 is provided with a refrigerant inlet 15, and the upper header pipe 12 is provided with a refrigerant outlet 16.

  2 is a perspective view showing the flat heat exchange tube 13A, FIG. 3 is a perspective view showing the heat exchange fin 14A, and FIG. 4 is a state in which the heat exchange fin 14A is fixed to one flat surface of the flat heat exchange tube 13A. FIG. 5 is a perspective view showing a state in which a plurality of flat heat exchange tubes 13A to which the heat exchange fins 14A shown in FIG. 4 are fixed are stacked.

  As shown in FIG. 2, the flat heat exchange pipe 13 </ b> A has a plurality of (six in FIG. 2) refrigerant passages 16 partitioned by a partition wall 15 at equal intervals in the width direction. The flat heat exchange tube 14A thus formed is formed of an extruded shape made of an aluminum alloy.

  The heat exchange fins 14 </ b> A are bent in a wave shape that is continuous in the vertical direction of the flat heat exchange tube 13 </ b> A, for example, a triangular wave shape, and are formed in a downward gradient toward the center of the flat surface of the flat heat exchange tube 13. . The gradient θ of the heat exchange fin 14A can be, for example, 10 ° to 45 °, and preferably 15 ° to 35 °.

  The heat exchange fin 14A is composed of a pair of fin halves 19 arranged on the left and right sides of the flat surface of the flat heat exchange tube 13A, and the pair of fin halves 19 is aligned with the approximate center of the flat surface of the flat heat exchange tube 13A. For example, a slight dimension of 3 mm or less, preferably 0.5 mm to 2 mm is opened, and this gap is used as a drain gap 17A. That is, the flat heat exchange pipe 13A and the heat exchange fins 14A are provided with a drain gap 17A along the substantially center of the flat surface of the flat heat exchange pipe 13 as a condensed water drop passage. Thereby, manufacture of the fin half body 19 is easy, the assembly | attachment to the flat surface of the flat heat exchange pipe | tube 13A is easy, and low manufacturing cost can be aimed at.

  The fin half 19 is formed by bending a thin plate material made of an aluminum alloy into a wave shape, for example, a triangular wave shape, for example, by pressing. Instead of pressing, roll forming or thin plate material may be bent by forming valley fold lines and mountain fold lines.

  According to the heat exchanger 10 having the above configuration, the header pipe 11 and the header pipe 12 are arranged up and down, and the header pipe 11 and the header pipe 12 are connected by the flat heat exchange pipe 13A. The flat surface of 13A is a vertical surface. For this reason, the condensed water adhering to the flat surface of the flat heat exchange tube 13A smoothly flows down and moves to the heat exchange fins 14A. Since the flat heat exchange pipe 13A is formed in a downward gradient toward the substantially flat width of the flat surface, the condensed water adhering to the heat exchange fins 14A and the condensed water moving from the flat surface of the flat heat exchange pipe 13A are It flows toward the approximate center of the width of the flat surface of the flat heat exchange tube 13A. Since the drain gap 17A is provided along substantially the center of the flat plane width of the flat heat exchange pipe 13A, the condensed water flowing through the heat exchange fins 14A flows down through the drain gap 17A. In addition, since the heat exchange fins 14A are formed in a wave shape that is continuous in the vertical direction, air easily passes through the passages of the heat exchange fins 14A, pressure loss is reduced, and heat exchange performance can be improved.

Second Embodiment
FIG. 6 is a perspective view showing a flat heat exchange tube 13B in the heat exchanger according to the second embodiment of the present invention, and FIG. 7 is a state in which the heat exchange fins 14B are fixed to one flat surface of the flat heat exchange tube 13B. FIG. 8 is a perspective view showing a state in which a plurality of flat heat exchange tubes 13B to which the heat exchange fins 14B shown in FIG. 7 are fixed are stacked.

  The heat exchanger of the second embodiment includes fin positioning ridges 20 on both sides of the flat heat exchange pipe 13B along the substantially flat center of the flat surface (in the drawing, the center of the width is shown), and the fin positioning ridges. The point which the convex surface of the part 20 becomes the clearance gap 17B for drainage is different from the heat exchanger of 1st Embodiment.

  In the second embodiment, the other parts are the same as those in the first embodiment, so the same parts are denoted by the same reference numerals and description thereof is omitted.

  According to the heat exchanger of the second embodiment, the approximate width center (specifically, the width center) of the flat heat exchange tube 13B can be easily and accurately matched with the approximate width center of the heat exchange fin 14B. As a result, the assembly time can be shortened and the production cost can be reduced.

  The heat exchanger of the second embodiment is the same as the heat exchanger of the first embodiment with respect to the configuration other than the above-described configuration. Like the first embodiment, the pressure loss can be reduced, and the heat exchanger The exchange performance can be improved.

<Third Embodiment>
FIG. 9 is a perspective view showing a state facing the position where the heat exchange fins 14C are fixed to one flat surface of the flat heat exchange tube 13C in the heat exchanger according to the third embodiment of the present invention.

  In the heat exchanger according to the third embodiment, the same upper and lower header pipes (not shown) as those shown in FIG. 1A are connected in communication by a flat heat exchange pipe 13C, and heat is generated in a gap between the flat heat exchange pipes 13C. An exchange fin 14C is interposed.

  This heat exchanging fin 14C is composed of a single fin body that is continuous in a wave shape, for example, a triangular wave shape in the vertical direction, and is a notch that extends from the approximate center of one side bent portion of the fin body to the vicinity of the other bent portion. 21 and the notch 21 coincides with the substantially center of the width of the flat heat exchange pipe 13C to form a drainage gap 17C.

  The heat exchanging fin 14C is bent so that the connecting portion 22 is left at the approximate center of the width of the other side bent portion, and both sides of the connecting portion 22 are inclined upward along the flat surface of the flat heat exchange tube 13C. Yes.

  The heat exchange fin 14C is formed by bending a thin plate material made of an aluminum alloy into, for example, a wave shape having a notch portion 21 and a connection portion 22 such as a triangular wave shape by pressing. In addition, it may replace with press work and provide the notch part 21 in roll forming or a thin board | plate material, and may bend and form by providing a valley fold line and a mountain fold line.

  In the third embodiment, the other parts are the same as those in the first embodiment. Therefore, the same parts are denoted by the same reference numerals and description thereof is omitted.

  According to the heat exchanger of the third embodiment, since the approximate center of the width of the flat heat exchange tube 13C and the approximate center of the width of the heat exchange fin 14C can be easily and accurately matched, the assembly time can be shortened, Production costs can be reduced.

  The heat exchanger according to the third embodiment is the same as the heat exchanger according to the first embodiment except for the above-described configuration. Like the first embodiment, the heat loss can be reduced, and the heat exchanger The exchange performance can be improved.

<Other embodiments>
(1) In the above embodiment, the case where the heat exchange fins 14A to 14C are formed to have the same width as the flat heat exchange tubes 13A to 13C has been described, but the width of the heat exchange fins is not necessarily set to the width of the flat heat exchange tubes. It is not necessary to match. For example, as shown in FIGS. 10A and 10B, the heat exchange fins 14D and 14E protrude outward from the flat heat exchange tubes 13D and 13E, and the gas to be cooled, that is, the air in the heat exchange fins 14D and 14E. The protruding area on the upstream side may be formed larger than the protruding area on the downstream side.

  In this case, in FIG. 10A, both fin halves 19D constituting the heat exchange fin 14D are formed to have the same width, and are displaced upstream of the air with respect to the center line of the flat surface of the flat heat exchange tube 13D ( α), leaving a gap 17D for drainage therebetween, and the protruding area of the fin half 19D (right side of the drawing) constituting the heat exchange fin 14D located on the upstream side of the air is the fin half located on the downstream side of the air It is larger than the protruding area of the body 19D (left side of the drawing).

  In FIG. 10B, the width of the fin half 19E (the right side of the drawing) constituting the heat exchange fin 14E located on the upstream side of the air is equal to the width of the fin half 19F (on the drawing side) of the fin. It is formed larger than the width on the left side, and is disposed leaving a drainage gap 17E at a substantially central position of the flat surface of the flat heat exchange pipe 13E.

  By configuring as described above, the heat exchange fins 14D and 14E can be provided with protrusions that are not in contact with the flat heat exchange tubes 13D and 13E, and the surface areas of the heat exchange fins 14D and 14E can be increased. Therefore, when the heat exchanger according to the present invention is used for an outdoor unit during heating operation, it is possible to prevent or delay blockage of the ventilation passage due to frost formation.

  In the above-described embodiment, the case where the heat exchange fins 14D and 14E are configured by the fin halves 19D, 19E, and 19F has been described, but the present invention can also be applied to the single heat exchange fin 14C of the third embodiment.

  (2) Although the case where the heat exchange fins 14A to 14E are formed in a triangular wave shape has been described in the above embodiment, for example, a substantially U-shaped heat exchange fin 14F may be used as shown in FIG. In addition, although the fin half body 19 of 1st Embodiment was formed in the substantially U-shaped wave shape and FIG. 11 formed the clearance gap 17F for drainage between the both fin half bodies 19, it demonstrated the heat of other embodiment. The wave shapes of the exchange fins 14B to 14E may be substantially U-shaped.

It is a schematic perspective view (a) of the heat exchanger of 1st Embodiment concerning this invention, and Ib-Ib sectional drawing (b) in (a). It is a perspective view which shows the flat heat exchange pipe | tube of the said heat exchanger. It is a perspective view which shows the heat exchange fin of the said heat exchanger. It is a perspective view which shows the state which fixed the heat exchange fin of FIG. 2 to one flat surface of the flat heat exchange pipe | tube of FIG. It is a perspective view which shows the state which laminated | stacked multiple flat heat exchange tubes which fixed the heat exchange fin shown in FIG. It is a perspective view which shows the flat heat exchange pipe | tube in the heat exchanger of 2nd Embodiment which concerns on this invention. It is a perspective view which shows the state which fixed the heat exchange fin to one flat surface of the flat heat exchange pipe | tube of FIG. It is a perspective view which shows the state which laminated | stacked multiple flat heat exchange tubes which fixed the heat exchange fin shown in FIG. It is a perspective view which shows the state which faced the position which fixes a heat exchange fin to one flat surface of the flat heat exchange pipe | tube in the heat exchanger of 3rd Embodiment which concerns on this invention. It is sectional drawing which shows another form of the heat exchange fin in the heat exchanger of 4th Embodiment which concerns on this invention. It is a perspective view which shows an example of another form of the heat exchange fin in this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Heat exchanger 11, 12 Header pipe 13A, 13B, 13C, 13D, 13E Flat heat exchange pipe 14A, 14B, 14C, 14D, 14E Heat exchange fin 14a Bending piece 17A, 17B, 17C, 17D, 17E Drain gap 19 , 19D, 19E, 19F Fin half body 20 Fin positioning convex portion 21 Notch portion 22 Connecting portion 23 Slit

Claims (5)

A pair of header pipes that are horizontally opposed to each other, a plurality of flat heat exchange tubes that are connected to the header pipes at the upper and lower ends thereof and arranged in parallel with each other, and closely spaced between the flat heat exchange tubes A heat exchanger comprising: a heat exchange fin,
The heat exchange fin is bent and formed in a continuous wave shape in the vertical direction of the flat heat exchange tube, is formed in a downward slope toward the approximate center of the flat surface of the flat heat exchange tube, and the flat heat exchange tube A heat exchanger characterized in that a drainage gap is provided along substantially the center of the flat surface of the heat exchange pipe. The heat exchanger according to claim 1, wherein
The heat exchange fin is composed of a pair of fin halves that are arranged on the left and right sides so as to provide the gap for drainage in accordance with the width of the flat surface of the flat heat exchange tube. vessel. The heat exchanger according to claim 1 or 2,
The flat heat exchange tube is provided with a fin positioning ridge along substantially the center of the width of the flat surface. The heat exchanger according to claim 1, wherein
The heat exchange fin is composed of a single fin body that is continuous in a wave shape in the vertical direction, and has a notch extending from approximately the center of the width of one side bent portion of the fin body to the vicinity of the other side bent portion, and the other side bent portion. A heat exchanger characterized in that a connecting portion is left substantially at the center of the width of the portion, and both sides of the connecting portion are bent so as to rise and incline along the flat surface of the flat heat exchange tube. The heat exchanger according to any one of claims 1 to 4,
The heat exchanger fin protrudes outward from the flat heat exchange tube, and has a protruding area on the upstream side of the gas to be cooled formed larger than a protruding area on the downstream side. .

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