WO2017145701A1 - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
- Publication number
- WO2017145701A1 WO2017145701A1 PCT/JP2017/003941 JP2017003941W WO2017145701A1 WO 2017145701 A1 WO2017145701 A1 WO 2017145701A1 JP 2017003941 W JP2017003941 W JP 2017003941W WO 2017145701 A1 WO2017145701 A1 WO 2017145701A1
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- WO
- WIPO (PCT)
- Prior art keywords
- fin
- flat tube
- notch
- heat exchanger
- flat
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
- F28F1/325—Fins with openings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
- F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
- F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/02—Tubular elements of cross-section which is non-circular
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2215/00—Fins
- F28F2215/12—Fins with U-shaped slots for laterally inserting conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
Definitions
- the present invention relates to a fin-and-tube heat exchanger using a flat tube.
- the fin-and-tube heat exchanger using a conventional flat tube regulates the position by fitting the flat tube between the restraining pins, holds the fin on the mounting drum that performs rotational movement, and rotates the mounting drum.
- it was manufactured using the manufacturing apparatus which mounts a fin on a flat tube sequentially (for example, refer patent document 1).
- the present invention has been made to solve the above-described problems, and suppresses a force to push and widen the closed end of the notch portion of the fin when the fin is fitted to the flat tube.
- the shape of the notch that can be used is adopted to reduce warping in the step direction of the flat tube and to prevent damage to the flat tube and the fin mounting plate.
- a heat exchanger according to the present invention is fixed to a plurality of flat tubes having a flat cross-section, which serve as a flow path of a heat conduction medium, and the flat surface is orthogonal to the flow direction of the flat tubes.
- a plurality of fins arranged at intervals in the flow path direction, the fin having a cutout portion for fitting the flat tube and a fin collar rising from an edge portion of the cutout portion.
- the opening end of the notch is larger than the outer width of the flat tube, and the fin collar has a fin collar inclined surface that rises from the edge of the notch with an inclination to the fin plane, and the fin collar inclined surface.
- a fin collar end surface portion that is bent from the end portion of the flat tube and is in surface contact with the outer surface of the flat tube.
- the opening end of the notch is larger than the outer width of the flat tube, the deformation of the fin when the fin is fitted to the flat tube can be suppressed. Since the end face part of the collar fin collar is in surface contact with the outer surface of the flat tube, the fin and the flat tube can be fixed, and thermal conductivity between the two can be ensured.
- FIG. 1 is a perspective view showing a heat exchanger 100 using a flat tube 1 having a flat cross section formed by a manufacturing method and a manufacturing apparatus to which the present invention is applied.
- a heat exchanger 100 is a fin-and-tube type using a flat tube 1, and includes a flat tube 1 and a fin 2, and the flat tube 1 is a notch 21 a provided in the fin 2. Are fitted to each other at this fitting portion.
- the fins 2 have a flat plate shape, and a plurality of fins 2 are mounted in parallel in the longitudinal direction of the flat tube 1, that is, in the direction of the flow path of the heat conducting medium at a constant interval.
- the flat tube 1 has a flat cross section perpendicular to the flow path direction, a plurality of the flat tubes 1 are arranged in parallel, and the outer peripheral planes (outer surfaces) of the adjacent flat tubes 1 face each other.
- a fluid serving as a heat transfer medium such as a refrigerant is flowed.
- FIG. 2 is a perspective view showing the shape of the notch 21a of the fin 2 constituting the heat exchanger 100 of the present invention.
- a plurality of notches 21a are provided at predetermined intervals on the end side along the longitudinal direction of the fin 2, but as shown in FIG. 2, one notch 21a has a width (external width) of the flat tube 1. W1)
- the slit is formed to have a wider width (open end width W2).
- the opening shape of the cutout portion 21a is U-shaped, and in a state where the fin 2 and the flat tube 1 are fitted, the semicircular portion (R portion) serving as the closed end of the cutout portion 21a has a flat shape. One semicircular end of the tube 1 is fitted.
- slits are formed in the flat surface portions 2a partitioned through the notches 21a.
- a fin collar 22 is formed on the same surface side of the fin 2 so as to rise along the edge of each notch 21a and to bring the flat tube 1 and the fin 2 into close contact with each other.
- the fin collar 22 and a slit are formed so as to protrude in the same direction with respect to the surface of the fin 2.
- the fin 2 includes the notch portion 21a into which the flat tube 1 is fitted, and the fin collar 22 that rises from the edge of the notch portion 21a toward the outer surface of the flat tube 1.
- the width W2 of the opening end of the cutout portion 21a is offset so as to expand from the semicircular portion of the closed end of the cutout portion 21a so as to be larger than the outer width W1 of the flat tube 1.
- the fin collar 22 is bent from the edge of the notch portion 21a so as to be inclined with respect to the fin plane, and is bent from the end of the fin collar inclined surface portion 22a, and is in surface contact with the outer surface of the flat tube 1.
- a fin collar end surface portion 22b is bent from the edge of the notch portion 21a so as to be inclined with respect to the fin plane, and is bent from the end of the fin collar inclined surface portion 22a, and is in surface contact with the outer surface of the flat tube 1.
- a fin collar end surface portion 22b is bent from the edge of the notch portion 21a so as to be
- the edge of the fin collar 22 of the fin 2 does not come into contact with the outer surface of the flat tube 1 even when the flat tube 1 is fitted.
- the flat tube 1 and the fin 2 are fixed by joining the outer surface of the flat tube 1 and the fin collar end surface portion 22b of the fin 2, and heat conductivity can be ensured by the surface contact between the two.
- the fin collar inclined surface portion 22a of the fin 2 extends from two parallel linear edges from the open end to the closed end of the U-shaped cutout portion 21a, and the flat portion 2a of the fin 2 In contrast, it is formed in a state of rising toward the outer surface of the flat tube 1 at an angle of less than 90 degrees.
- the angle formed by the surface on the extension of the flat portion 2a of the fin 2 and the lower surface of the fin collar inclined surface portion 22a is less than 90 degrees.
- the angle formed by the upper surface of the flat portion 2a of the fin 2 and the upper surface of the fin collar inclined surface portion 22a is an angle (obtuse angle) larger than 90 degrees.
- the flat tube 1 has a fluid such as water or refrigerant flowing therein, but the cross section is flat so that the water resistance can be increased without increasing the ventilation resistance compared to the circular tube.
- the amount of fluid such as refrigerant can be increased.
- the performance as the heat exchanger 100 can be improved. That is, when compared as the same performance, the heat exchanger 100 using the flat tube 1 has an advantage that the size can be reduced as compared with the heat exchanger using the conventional circular tube.
- the fins 2 are arranged across a plurality of flat tubes 1 juxtaposed, with the main plane orthogonal to the flow direction of the flat tubes 1 and spaced apart in the flow direction, By mounting the flat tubes 1 individually in the respective cutout portions 21a, the flat tubes 1 are mounted on the outer peripheral surface and the outer surface of the flat tubes 1.
- the direction in which the flat tubes 1 are arranged perpendicular to the flow direction of the flat tubes 1 is the step direction of the flat tubes 1.
- the step direction in which the plurality of flat tubes 1 are juxtaposed is the same as the direction in which the cutout portions 21a of the plurality of fins 2 are arranged. Needless to say, the pitch at which the portions 21a are arranged is the same.
- FIG. 3 is a conceptual diagram showing an apparatus for manufacturing the heat exchanger 100 to which the present invention is applied.
- a plurality of fins 2 are provided on the outer peripheral surface of the flat tube 1 through which a fluid as a heat conduction medium flows, and the flow direction of the flat tube 1 ( And a moving function for relatively moving the fin 2 and the flat tube 1 to be attached to the flat tube 1 in the length direction of the flat tube 1, and the fin 2.
- a fin mounting function for mounting the flat tube 1 one by one and a flat tube restraining function for restraining the position in the width direction of the flat tube 1 when performing fin mounting by the fin mounting function are provided.
- a plurality of flat tubes 1 are arranged in parallel at predetermined intervals according to the required cooling / heating performance. Then, the flat tube restraining function restrains all of the juxtaposed flat tubes 1 and the fin mounting function attaches the required number of fins 2 to the constrained flat tube 1 at a predetermined interval. To manufacture fin and tube.
- the fin mounting function will be described in detail with reference to FIG.
- the drum 122 constituting the manufacturing apparatus rotates around the axis X in the direction of arrow A, that is, in the clockwise direction in FIG.
- an optimal one such as a servo motor is selected as appropriate.
- a plurality (eight in FIG. 3) of fin mounting plates 121 installed at predetermined intervals in the circumferential direction of the drum 122 are provided on the peripheral portion of the drum 122.
- Each fin mounting plate 121 performs a circular motion around the axis X as the drum 122 rotates.
- the drum 122 is repeatedly operated and stopped every 1/8 rotation, that is, at a 45-degree pitch. At this time, an optimal value is appropriately selected for the rotation speed.
- the fin mounting plate 121 that has reached the top of the drum 122 receives and holds one fin 2 supplied from another mechanism (not shown).
- the holding of the fin 2 by the fin mounting plate 121 employs, for example, vacuum suction that sucks the fin 2 using air suction.
- the fin mounting plate 121 holding the fins 2 rotates in the direction of the arrow A around the axis X as the drum 122 rotates halfway, and is perpendicular to the flat tube 1 at the lower part (below the drum 122). Stop in posture. Then, the fin 2 can be attached to the outer peripheral surface of the flat tube 1 by separating the fin 2 held by the vacuum suction from the fin attachment plate 121 by vacuum break. Next, when the drum 122 further rotates, the fin mounting plate 121 separated from the fin 2 rotates. Here, the fin mounting plate 121 operates so as not to interfere with the fin 2 mounted on the flat tube 1. There is a need. For this operation, a cam follower 124 is attached to the fin mounting plate 121.
- a cam (not shown) is installed at the rotation center portion of the drum 122. As the drum 122 rotates, the cam follower 124 follows the cam to control the posture of the fin mounting plate 121 so that the fin mounting plate 121 does not interfere with the fin 2.
- FIG. 4 is a perspective view showing a flat tube restraining portion 300 having a flat tube restraining function, which is a part of the manufacturing apparatus of the heat exchanger 100 to which the present invention is applied.
- the base of the flat tube restraining portion 300 is a base plate 302, and the flat tube 1 is placed between the restraining pins 301 planted on the base plate 302 so that the major axis direction of the cross section is vertical. Retained.
- the flat tube restraint part 300 is made into predetermined
- a predetermined distance is moved in the direction of arrow B.
- an optimal one such as a servo motor is appropriately selected. Since the movement distance in the B direction varies depending on the product specifications, an optimal value is appropriately selected along with the movement speed, and can be easily changed on the operation panel for operating the apparatus. Needless to say, the flat tube 1 may be fixed and the drum 122 may be moved in the direction opposite to the arrow B.
- the flat tube restraint portion 300 includes a plurality of restraint pins 301 and a base plate 302 provided with holes (not shown) for fixing these restraint pins 301 at an equal pitch.
- the plurality of restraining pins 301 are fixed by being partially attached to holes provided in a line on one side and the other side of the surface of the base plate 302.
- Two restraining pins 301 adjacent to each other on one side and the other side of the surface of the base plate 302 restrict the horizontal position of the flat tube 1 on the surface of the base plate 302.
- the several flat tube 1 is arrange
- the flat tube restraining function moves by the moving function while always restraining (contacting) the flat tube 1 while performing the fin mounting operation as described above. That is, the restraining pin 301 and the flat tube 1 are in contact with each other. Therefore, a material excellent in wear resistance is selected for the restraining pin 301.
- the spacing between the restraint pins 301 located on both sides of one flat tube 1 is set slightly wider than the width of the flat tube 1.
- the flat tube restraint 300 is easily attached and detached.
- the case where the constraining pins 301 are arranged in two rows and the pins located on both sides of the plurality of flat tubes 1 are set to be in the same row is shown.
- Three or more rows of restraining pins 301 may be arranged so that three or more places are locked in the direction of one flow path.
- the constraining pins located on both sides of the plurality of flat tubes 1 may be arranged in a zigzag so as to form, for example, a staggered pattern without forming the same row.
- a bearing or the like that rotates in the direction in which the flat tube 1 operates by a moving function may be selected and used.
- the flat tube 1 is moved a predetermined distance by the moving function, and the next fin 2 is mounted on the flat tube 1 again by the fin insertion function.
- a series of cycles (a cycle in which the fin 2 is attached to the flat tube 1 and the flat tube 1 is moved) are continuously performed a predetermined number of times, so that a plurality of fins 2 are attached on the flat tube 1 at regular intervals, for example.
- the heat exchanger 100 made to be able to be manufactured can be manufactured.
- FIG. 5 shows a side sectional view of the heat exchanger 100 before the fins 2 are attached to the flat tube 1 and after the fins 2 are attached.
- FIG. 5 is a view showing the assembly of the fin 2 to the flat tube 1 of the heat exchanger 100.
- the fin 2 does not have a structure in which the edge of the notch 21 a is pressed against the outer surface of the flat tube 1 before the fin is mounted. Therefore, even when the fin 2 is attached to the flat tube 1, as shown in the lower diagram of FIG. 5, it is difficult to generate a force that pushes and widens the closed end of the notch 21 a of the fin 2.
- the heat exchanger 100 does not warp in the longitudinal direction of the fins 2 or the inclination of the flat tube 1 due to the influence of the warp. Therefore, in the manufacturing process of the heat exchanger 100, even when the fins 2 are sequentially attached to the flat tubes 1, even if the flat tube restraining portion 300 is retracted and removed from the heat exchanger 100 being manufactured, the fins are attached. Since the plate 121 and the flat tube 1 do not interfere with each other, the fin 2 can be mounted up to the fin mounting end portion of the flat tube 1 to complete the heat exchanger 100.
- FIGS. 6A and 6B are cross-sectional views of the fin 2 along the flow direction of the flat tube 1 and the width direction of the open end of the notch 21a.
- the fin collar 22 includes the fin collar inclined surface portion 22a.
- the fin collar inclined surface portion 22a includes a fin collar inclined surface portion 22aa composed of a plane.
- a fin collar inclined surface portion 22ab made of a curved surface may be used.
- the curved fin-shaped inclined surface portion 22ab of FIG. 6B has a protruding direction on the side of the cutout portion 21a, but can be used by changing its shape, such as a curved shape protruding on the opposite side. Needless to say.
- the fin collar inclined surface portions 22aa and 22ab are at an angle of less than 90 degrees with respect to the surface on the extension of the planar portion 2a of the fin 2 from the edge portion of the notch portion 21a. It is formed by bending, and is in surface contact with the outer surface of the flat tube 1 at the ends of the fin collar inclined surface portions 22aa and 22ab. Further, the end portions of the fin collar inclined surface portions 22aa and 22ab are further bent to form the fin collar end surface portion 22b, and the plane of the fin collar end surface portion 22b is in surface contact with the outer surface of the flat tube 1. Therefore, it is possible to obtain a state in which the fin collar end face portion 22b is joined to the flat tube 1 with a sufficient area, thereby improving the heat exchange performance of the heat exchanger 100.
- FIG. 9 shows a perspective view of a fin 200 as a comparative example.
- the fin 200 as a comparative example is provided with a narrow notch 210 whose opening end is smaller than the outer width of the flat tube 1.
- the fin 200 is formed such that the width W3 of the opening end of the narrow notch 210 is slightly smaller than the width W1 of the flat tube 1 and further, from the edge of the narrow notch 210 to the plane. Since the fin collar 220 is formed so as to rise perpendicularly to the portion 200a, it is possible to suppress positional deviation when the fin 2 is assembled to the flat tube 1.
- FIG. 10 shows a cross-sectional view when the fin 200 of FIG. 9 is attached to the flat tube 1.
- the fin 200 is not deformed such as a warp before being attached to the flat tube 1.
- the edge of the narrow notch 210 pushes the outer surface of the flat tube 1 and the narrow notch 210 is closed.
- a force is exerted to push and spread the end, but this force is regulated by the restraining pin 301 since the flat tube restraining portion 300 (not shown) holds the flat tube 1, and at this stage, the fin 200 is deformed. Is not seen.
- the width of the opening end of the narrow notch 210 is widened and warping occurs in the longitudinal direction of the fin 200. .
- the force that pushes and spreads the narrow notch 210 becomes stronger as it goes to the outside of the heat exchanger 100, so that there is nothing to cancel the force, and the flat tube 1 on the outside becomes inclined, and the flat tube A change occurs in the juxtaposed state of 1.
- the opening width W2 of the shape of the notch 21a is set to be larger than the width W1 of the flat tube 1, thereby suppressing the generation of unnecessary stress and the productivity. Can be improved.
- the plane of the fin collar end surface portion 22b and the outer surface of the flat tube 1 are provided in parallel, and these surfaces are in surface contact with each other. Therefore, it is possible to secure both of them and heat conductivity.
- FIG. FIG. 7 is a conceptual diagram showing the heat exchanger 100 according to the second embodiment of the present invention
- FIG. 7A is a perspective view showing the shape of the notch 21b of the fin 2
- FIG. ) Is a side sectional view showing an assembled state of the fin 2 to the flat tube 1.
- the width W2 of the opening end of the cutout portion 21a is larger than the width W1 of the closed end, and the two linear edges of the U-shaped cutout portion 21a are parallel to each other.
- the notch 21b of the fin 2 according to the second embodiment has a U-shaped width W2 at the opening end of the notch 21b as shown in FIG.
- the opening width of the notch 21b is larger as it is closer to the opening end, and is smaller as it is closer to the closing end.
- the opening shape of the cutout portion 21b is formed so as to be closer to the opening end, so the distance between the edge portion of the cutout portion 21b and the outer surface of the flat tube 1 is also as follows. The closer to the closed end, the larger. Therefore, the shape of the fin collar 23 also changes accordingly, and the closer to the opening end of the cutout portion 21b, the larger the rising width of the fin collar inclined surface portion 23a, and the closer to the closed end of the cutout portion 21b, The fin collar inclined surface portion 23a is formed to have a small rising width.
- the fin collar end surface portion 23b is bent from the end portion of the fin collar inclined surface portion 23a in the same manner as the fin collar end surface portion 22b of the first embodiment.
- FIG. 7A shows an example in which it is larger as it is closer to the opening end of the notch portion 21b and smaller as it is closer to the closed end.
- the rising dimension (width) of the fin collar end face part 23b can be adjusted to be the same dimension regardless of the depth of the notch part 21b.
- the bonding area can be increased by increasing the dimension (width) closer to the closed end of the cutout portion 21b.
- the shape of the cutout portion 21b of the fin 2 is not necessarily limited to the constant width (W2) as shown in FIG. 2 (a), and the flat tube 1 as shown in FIG. 7 (a).
- the width W2 of the opening end may be larger than the width W1 of the opening.
- FIG. FIG. 8 is a conceptual diagram showing a heat exchanger 100 according to Embodiment 3 of the present invention, and the fin 2 to the flat tube 1 when one fin 2 is used in combination with a plurality of cutout portions. It is a sectional side view which shows the assembly
- the example in which the plurality of cutout portions 21a or 21b formed in the fin 2 are all of the same shape is shown.
- the plurality of cutout portions formed in one fin 2 do not have to have the same shape, and can be used in combination with cutout portions having different shapes.
- the narrow notch portion 210 shown as the comparative example of the first embodiment and the notch shown in the second embodiment.
- the fins 2 in which the portions 21b are alternately arranged can be used. It goes without saying that the advantages of both can be taken in by arranging the narrow notches 210 and the notches 21b alternately. Not only this but the notch part provided in the fin 2 is good also as three or more types, and what is necessary is just to select and employ
- the notches 21a and 21b of the fin 2 shown in the first embodiment and the second embodiment do not generate a force to spread the closed end side of the fin 2, but on the other hand, between the flat tube 1 and the fin 2 There is a tendency for the contact force to decrease. Therefore, in order to compensate for the contact force between the flat tube 1 and the fin 2, as shown in FIG. 8, a part of the plurality of notches is formed in the fin 2 with a narrow width W 3 that is slightly narrower than the width W 1 of the flat tube 1. By replacing with the notch portion 210, the contact force with the flat tube 1 can be increased, and the positional deviation between the flat tube 1 and the fin 2 can be suppressed.
- the fin 2 attached to the flat tube 1 is many pieces.
- the necessary number of fins 2 having the same shape are prepared and sequentially assembled to the flat tube 1, but the fins 2 attached to one heat exchanger 100 are:
- a plurality of types of fins 2 having different notch shape can be used in combination.
- the fin 2 provided only with the notch 21a shown in FIG. 2 of the first embodiment, and the fin 2 provided only with the notch 21b shown in FIG. 7A of the second embodiment.
- FIG. 11 (a), 11 (b), and 11 (c) are perspective views of the fin 2 according to the fourth embodiment of the present invention, and show the shapes of the cutout portions 21c, 21d, and 21e, respectively.
- the fin collars 22 and 23 are provided symmetrically with respect to the center line passing through the notch 21a or the closed end vertex of the notch 21b, and the left and right fin collar shapes are provided. An example where is the same.
- the fin collars rising from the left and right edges of the notches 21c, 21d, and 21e have different shapes.
- a fin collar 22 is formed on the left edge of the notch 21c of the fin 2
- a fin collar 23 is formed on the right edge.
- the cutout portion 21c of the fin 2 shown in FIG. 11 (a) has an opening end larger than the closed end (semicircular portion), and two cutout portions 21c that fit into the main plane of the flat tube 1 are provided.
- the edge on the side where the fin collar 22 is formed is located on a line parallel to the main plane of the flat tube 1, and the edge on the side where the other fin collar 23 is formed is It is located on a line connecting the open end and the closed end of the notch 21c.
- a broken line extending from a contact point between the closed end of the notch 21 c and the fin collar 23 indicates a line parallel to the edge of the fin collar 22.
- the opening width W4 on the closed end side is offset in a direction extending from the end of the semicircular portion (width W1) of the closed end of the notch 21c, and the offset width is larger than the outer width W1 of the flat tube 1 by the offset amount. Is also formed large.
- the opening width W2 of the notch 21c is wider than the opening width W4 on the closed end side by the extent of the fin collar 23.
- the fin collars 22 and 23 having the fin collar inclined surface portions 22a and 23a and the fin collar end surface portions 22b and 23b are arranged on the left and right sides of the notch portion 21c. While suppressing the deformation of the fin 2 at the time of assembling to the flat tube 1 at the left and right of the notch 21c, the fin 2 and the flat tube 1 can be stably fixed.
- the left edge part has the fin collar of the first embodiment. 22 is formed, and a fin collar 220 having a conventional structure is formed at the right edge.
- the opening end of the cutout portion 21d is larger than the closed end, and the fin collars 22 and 220 rising from the two linear edges of the cutout portion 21d have different shapes.
- the edge on the side where the fin collar 22 is formed is located on a line connecting the position where the cutout portion 21d is widened from the semicircular portion at the closed end and the opening end, and the fin collar 220 is formed.
- the edge on the side is located on a line connecting the open end and the closed end, and both are arranged in parallel.
- the opening end width and the opening width W4 on the closed end side have the same dimensions and are larger than the width W1 of the closed end (semicircular portion).
- the fin collar 23 of the second embodiment is formed on the left edge of the notch 21e of the fin 2, and the fin collar 220 is formed on the right edge.
- the opening end width W4 of the notch 21e is larger than the closed end width W1 by the extent of the fin collar 23. Needless to say, the cutout portions 21c, 21d, and 21e of the fin 2 shown in FIGS.
- notches 21c, 21d, and 21e of the fin 2 shown in FIGS. 11A, 11B, and 11C when the fin 2 is mounted, the first embodiment and Similarly to the second embodiment, it is possible to suppress the generation of force that tries to push and widen the closed ends of the notches 21c, 21d, and 21e, and to stably fix the fin 2 to the flat tube 1 Is possible. Moreover, it is needless to say that notches 21c, 21d, and 21e shown in FIG. 11 can be formed in the fin 2 in any order as in the third embodiment.
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- Physics & Mathematics (AREA)
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- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
そして、扁平チューブにフィンを装着する製造段階において、扁平チューブの段方向の反りが大きくなると、扁平チューブにフィンを挿入できなくなる場合があった。扁平チューブにフィンを挿入できない状態で熱交換器の製造装置を稼働させた場合、フィン装着板と扁平チューブとが衝突するなどの不具合が生じ、製造装置が停止故障する恐れがあった。 In the heat exchanger disclosed in
And in the manufacturing stage which mounts a fin to a flat tube, when the curvature of the step direction of the flat tube became large, it might become impossible to insert a fin into a flat tube. When the heat exchanger manufacturing apparatus is operated in a state in which the fins cannot be inserted into the flat tube, there is a possibility that the fin mounting plate and the flat tube collide with each other and the manufacturing apparatus may stop and break down.
本発明の実施の形態1の熱交換器について、図1から図6を用いて説明する。
図1は、この発明が適用される製造方法および製造装置により製造される、断面が扁平状に形成された扁平チューブ1を用いた熱交換器100を示す斜視図である。図1において、熱交換器100は、扁平チューブ1を用いたフィンアンドチューブ式のものであって、扁平チューブ1とフィン2とからなり、扁平チューブ1はフィン2に設けられた切り欠き部21aに嵌合し、この嵌合部において互いに接合した状態となっている。
フィン2は、平板状であって、扁平チューブ1の長手方向、つまり熱伝導媒体の流路方向に一定の間隔で平行に多数枚が装着されている。扁平チューブ1は、流路方向に垂直な断面が扁平形状であり、複数本が並列に、隣り合う扁平チューブ1の外周平面(外側面)が互いに向かい合って配置され、それぞれの内部には水や冷媒等の熱伝導媒体となる流体が流される。
A heat exchanger according to
FIG. 1 is a perspective view showing a
The
この切り欠き部21aの開口形状はU字形状であり、フィン2と扁平チューブ1とが嵌合した状態において、切り欠き部21aの閉口端となる半円形状部(R部)には、扁平チューブ1の一方の半円形状端部が嵌合する。 FIG. 2 is a perspective view showing the shape of the
The opening shape of the
そして、フィン2の同一表面側には、それぞれの切り欠き部21aの縁部に沿って立ち上がり、扁平チューブ1とフィン2とを密着させて接合するためのフィンカラー22が形成されている。
なお、フィンカラー22および図示しないスリットは、フィン2の表面に対し同一方向に突出して形成されている。 In addition, slits (not shown) are formed in the
A
The
そのため、フィン2のフィンカラー22の縁部は、扁平チューブ1と嵌合した状態でも扁平チューブ1の外側面に接した状態とならない。
扁平チューブ1とフィン2との固定は、扁平チューブ1の外側面とフィン2のフィンカラー端面部22bとの接合によって行われ、両者が面接触することにより熱伝導性を確保することができる。 As described above, the
Therefore, the edge of the
The
図1に示すように、複数の扁平チューブ1が並置された段方向と、複数のフィン2の切り欠き部21aが配置された方向は同じであり、上記の方向において、扁平チューブ1および切り欠き部21aが配置されるピッチは同じとなることは言うまでもない。 As shown in FIG. 1, the
As shown in FIG. 1, the step direction in which the plurality of
その後、真空吸着にて保持していたフィン2を真空破壊にてフィン装着板121から離すことで、扁平チューブ1の外周面にフィン2を装着させることができる。
次に、さらにドラム122が回転することでフィン2を離したフィン装着板121が回転するが、ここで、フィン装着板121は、扁平チューブ1に装着されたフィン2に干渉しないように動作する必要がある。この動作のためにフィン装着板121にカムフォロア124が取り付けられている。さらに、ドラム122の回転中心部分には、図示しないカムが設置されている。ドラム122が回転することに伴い、カムフォロア124がカムに倣うことでフィン装着板121の姿勢をコントロールし、フィン2にフィン装着板121が干渉しない構成とすることができる。 The
Then, the
Next, when the
これにより、複数の扁平チューブ1は、扁平チューブ1の幅方向に等ピッチに揃えられる。扁平チューブ拘束機能は、上述のようなフィン装着動作を行っている間、扁平チューブ1を常時拘束(接触)しながら移動機能により移動している。つまり、拘束ピン301と扁平チューブ1は接触した状態となる。よって拘束ピン301は耐摩耗性に優れた材質が選択される。 In FIG. 4, the flat
Thereby, the several
ここで、図4の例では、拘束ピン301を2列に配置し、複数の扁平チューブ1の両側部に位置するピンが同一の列となるように設定した場合を示しているが、扁平チューブ1の流路方向に3カ所以上を係止するように、拘束ピン301を3列以上配列してもよい。また、複数の扁平チューブ1の両側部に位置する拘束ピンが同一の列をなさず、例えば千鳥状となるようにジグザグに配列することも可能である。また、拘束ピン301の代わりに、移動機能によって扁平チューブ1が動作する方向に回転する、例えばベアリングのようなものを選んで用いてもよい。 In the flat
Here, in the example of FIG. 4, the case where the constraining
従って、熱交換器100の製造過程において、扁平チューブ1に対してフィン2を順次装着させる段階で、扁平チューブ拘束部300を退避させ、製造中の熱交換器100から取り外したとしても、フィン装着板121と扁平チューブ1とが干渉しなくなるため、扁平チューブ1のフィン装着終端部までフィン2を装着させ、熱交換器100を完成させることができる。 Next, FIG. 5 shows a side sectional view of the
Therefore, in the manufacturing process of the
上述したように、フィンカラー22はフィンカラー傾斜面部22aを備えているが、フィンカラー傾斜面部22aは、図6(a)に示すように、平面よりなるフィンカラー傾斜面部22aaがあり、これ以外に、図6(b)に示すように、曲面よりなるフィンカラー傾斜面部22abとすることも可能である。図6(b)の曲面形状のフィンカラー傾斜面部22abは、突出方向が切り欠き部21a側であるが、反対側に突出する曲面形状とするなど、その形状を変化させて用いることが可能であることは言うまでもない。 Next, the modification of the
As described above, the
図10の中図に示すように、扁平チューブ1にフィン200を嵌合させると、狭幅切り欠き部210の縁部が扁平チューブ1の外側面を押すとともに、狭幅切り欠き部210の閉口端を押し広げようとする力が働くが、この力は、図示しない扁平チューブ拘束部300に扁平チューブ1を保持させた状態にあるため、拘束ピン301によって規制され、この段階ではフィン200に変形は見られない。
しかし、図10の下図に示すように、扁平チューブ1を扁平チューブ拘束部300から外した段階で、狭幅切り欠き部210の開口端の幅が広がり、フィン200の長手方向に反りが発生する。狭幅切り欠き部210を押し広げようとする力は、熱交換器100の外側になるほど、力を打ち消すものが無くなるために強く作用し、外側にある扁平チューブ1ほど傾くようになり、扁平チューブ1の並置状態に変化が生じる。 Next, FIG. 10 shows a cross-sectional view when the
As shown in the middle diagram of FIG. 10, when the
However, as shown in the lower diagram of FIG. 10, when the
図7は、本発明の実施の形態2による熱交換器100を示す概念図であり、図7(a)は、フィン2の切り欠き部21bの形状を示す斜視図であり、図7(b)は、扁平チューブ1へのフィン2の組み付け状態を示す側断面図である。
上述の実施の形態1では、切り欠き部21aの開口端の幅W2は閉口端の幅W1よりも大きく、かつ、U字形状である切り欠き部21aの二本の直線状の縁部が平行である場合を例示していたが、この実施の形態2によるフィン2の切り欠き部21bは、図7(a)に示すように、切り欠き部21bの開口端の幅W2は、U字形状の半円形状の直径に等しい閉口端の幅W1よりも大きく、かつ、切り欠き部21bの二本の直線状の縁部は、夫々、開口端と閉口端を結ぶ非平行な線上に位置している。切り欠き部21bの開口幅は、開口端に近いほど大きく、閉口端に近いほど小さく形成された状態となっている。
FIG. 7 is a conceptual diagram showing the
In the first embodiment described above, the width W2 of the opening end of the
しかし、フィンカラー傾斜面部23aの立ち上がり幅の大きさについては、図7(a)では、切り欠き部21bの開口端に近いほど大きく、閉口端に近いほど小さくなるような例を示したが、フィン2をプレス成型により製造する段階で、フィンカラー端面部23bの立ち上がり寸法(幅)は切り欠き部21bの深さに関係なく同じ寸法となるように調整することが可能である。また、フィンカラー端面部23bの変形例として、切り欠き部21bの閉口端に近い方の寸法(幅)を大きくすることで接合面積を稼ぐことも可能であることは言うまでもない。 The fin collar
However, as for the size of the rising width of the fin collar
そして、切り欠き部21bの閉口端に近い位置において、扁平チューブ1とのフィン2とを隙間なく嵌合させる状態を得ることで、扁平チューブ1に対してフィン2を装着した後の扁平チューブ1とフィンカラー23との接触性を確保することが可能となる。 As described above, the shape of the
And the
図8は、本発明の実施の形態3による熱交換器100を示す概念図であり、1つのフィン2に複数の形状の切り欠き部を組み合わせて用いた場合の、扁平チューブ1へのフィン2の組み付け状態を示す側断面図である。
上述の実施の形態1または実施の形態2では、フィン2に形成される複数の切り欠き部21aまたは21bは、全て同じ形状のものである例を示していた。しかし、1枚のフィン2に形成される複数の切り欠き部は、全て同じ形状でなくても良く、異なる形状の切り欠き部を組み合わせて用いることが可能である。
FIG. 8 is a conceptual diagram showing a
In the first embodiment or the second embodiment described above, the example in which the plurality of
これに限らず、フィン2に設ける切り欠き部は3種類以上としてもよく、適宜最適なものを選択して採用すればよい。さらに、一つのフィン2上での切り欠き部の配置についても、必ずしも異なる種類の切り欠き部を交互に配置形成する必要はなく、例えば、2つおきに切り欠き部形状を変更すること、装着部位によって切り欠き部形状を使い分けることなども可能であることは言うまでもない。 For example, as shown in FIG. 8, two types of notch portions having different opening widths are adopted, and the
Not only this but the notch part provided in the
図11(a)、(b)、(c)は、夫々、本発明の実施の形態4によるフィン2の斜視図であり、切り欠き部21c、21d、21eの形状を示す図である。
上述の実施の形態1および実施の形態2では、フィンカラー22、23が切り欠き部21aもしくは切り欠き部21bの閉口端頂点を通る中心線に対して線対称に設けられ、左右のフィンカラー形状が同じである例を示した。この実施の形態4では、切り欠き部21c、21d、21eの左右の縁部から立ち上がるフィンカラーが、それぞれ異なる形状である場合について説明する。
図11(a)に示すように、フィン2の切り欠き部21cの左側の縁部にはフィンカラー22が形成されており、右側の縁部にはフィンカラー23が形成されている。
11 (a), 11 (b), and 11 (c) are perspective views of the
In the first embodiment and the second embodiment described above, the
As shown in FIG. 11A, a
フィンカラー22を備えたフィン2は、切り欠き部21dの開口端は閉口端よりも大きく、この切り欠き部21dの二本の直線状の縁部から夫々立ち上がるフィンカラー22、220は異なる形状であり、フィンカラー22が形成される側の縁部は、閉口端の半円形状部から切り欠き部21dが広がる方向にオフセットした位置と開口端を結ぶ線上に位置し、フィンカラー220が形成される側の縁部は、開口端と閉口端を結ぶ線上に位置しており、両者は平行な配置となっている。切り欠き部21dでは、開口端幅と、閉口端側の開口幅W4とは同じ寸法であり、閉口端(半円形状部)の幅W1よりも大きい。 Moreover, as shown in FIG.11 (b), among the two linear edge parts of the notch part of the
In the
なお、図11(a)、(b)、(c)に示すフィン2の切り欠き部21c、21d、21eは、左右でフィンカラーが入れ替わっても問題ないことは言うまでもない。 Further, as shown in FIG. 11C, the
Needless to say, the
また、実施の形態3と同様に、フィン2へ図11に示す切り欠き部21c、21d、21eを任意の順番に形成することが可能であることは言うまでもない。 Thus, by adopting the shape of the
Moreover, it is needless to say that
Claims (10)
- 熱伝導媒体の流路となる、断面が扁平形状の複数の扁平チューブ、
上記扁平チューブに固定され、上記扁平チューブの流路方向に対し、主平面が直交し、流路方向に間隔を隔てて配置された複数のフィンを備え、
上記フィンは、上記扁平チューブを嵌合させる切り欠き部および上記切り欠き部の縁部から立ち上がるフィンカラーを有し、
上記切り欠き部の開口端は、上記扁平チューブの外形幅よりも大きく、
上記フィンカラーは、上記切り欠き部の縁部からフィン平面に対して傾斜して立ち上がるフィンカラー傾斜面部と、上記フィンカラー傾斜面部の端部から折れ曲がり、上記扁平チューブの外側面に面接触するフィンカラー端面部とを有することを特徴とする熱交換器。 A plurality of flat tubes having a flat cross-section, which serve as a flow path for the heat transfer medium,
Fixed to the flat tube, the main plane is orthogonal to the flow direction of the flat tube, and includes a plurality of fins arranged at intervals in the flow direction,
The fin has a notch for fitting the flat tube and a fin collar that rises from an edge of the notch,
The opening end of the notch is larger than the outer width of the flat tube,
The fin collar includes a fin collar inclined surface portion that is inclined with respect to the fin plane from the edge of the notch portion, a fin that is bent from an end portion of the fin collar inclined surface portion, and is in surface contact with the outer surface of the flat tube. A heat exchanger having a collar end face portion. - 上記切り欠き部の開口形状はU字形状であり、上記切り欠き部の閉口端となる半円形状部に、上記扁平チューブの一方の半円形状端部が嵌合し、
上記フィンカラー傾斜面部は、上記切り欠き部の開口端から閉口端に至る二本の直線状の縁部から延在し、フィン平面に対し90度未満の角度で上記扁平チューブの外側面に向かって立ち上がることを特徴とする請求項1記載の熱交換器。 The opening shape of the cutout portion is U-shaped, and one semicircular end portion of the flat tube is fitted to the semicircular shape portion that becomes the closed end of the cutout portion,
The fin collar inclined surface portion extends from two straight edges extending from the open end to the closed end of the cutout portion, and faces the outer surface of the flat tube at an angle of less than 90 degrees with respect to the fin plane. The heat exchanger according to claim 1, wherein the heat exchanger stands up. - 上記切り欠き部の開口端は閉口端よりも大きく、上記切り欠き部の二本の直線状の縁部は平行であることを特徴とする請求項2記載の熱交換器。 The heat exchanger according to claim 2, wherein an opening end of the notch is larger than a closed end, and two linear edges of the notch are parallel.
- 上記切り欠き部の開口端は閉口端よりも大きく、上記切り欠き部の二本の直線状の縁部は、夫々、上記開口端と上記閉口端を結ぶ線上に位置することを特徴とする請求項2記載の熱交換器。 The opening end of the notch is larger than the closing end, and two linear edges of the notch are respectively located on a line connecting the opening end and the closing end. Item 3. The heat exchanger according to Item 2.
- 上記フィンカラー傾斜面部および上記フィンカラー端面部は、いずれも平面であることを特徴とする請求項1から4のいずれか一項記載の熱交換器。 The heat exchanger according to any one of claims 1 to 4, wherein each of the fin collar inclined surface portion and the fin collar end surface portion is a flat surface.
- 上記フィンカラー傾斜面部は曲面であり、上記フィンカラー端面部は平面であることを特徴とする請求項1から4のいずれか一項記載の熱交換器。 The heat exchanger according to any one of claims 1 to 4, wherein the fin collar inclined surface portion is a curved surface, and the fin collar end surface portion is a flat surface.
- 上記フィンは、上記切り欠き部に加え、開口端が上記扁平チューブの外形幅より小さい狭幅切り欠き部を有することを特徴とする請求項1から6のいずれか一項記載の熱交換器。 The heat exchanger according to any one of claims 1 to 6, wherein the fin has a narrow cutout portion whose opening end is smaller than the outer width of the flat tube in addition to the cutout portion.
- 上記切り欠き部と上記狭幅切り欠き部とは、上記フィンの端部において交互に配置されたことを特徴とする請求項7記載の熱交換器。 The heat exchanger according to claim 7, wherein the notches and the narrow notches are alternately arranged at end portions of the fins.
- 上記切り欠き部の開口端は閉口端よりも大きく、上記切り欠き部の二本の直線状の縁部から夫々立ち上がるフィンカラーは異なる形状であり、上記縁部の一方は、上記扁平チューブの主平面に平行な線上に位置し、上記縁部の他方は、上記開口端と上記閉口端を結ぶ線上に位置することを特徴とする請求項2記載の熱交換器。 The opening end of the notch is larger than the closed end, the fin collars rising from the two linear edges of the notch are different shapes, and one of the edges is the main of the flat tube The heat exchanger according to claim 2, wherein the heat exchanger is located on a line parallel to a plane, and the other of the edge portions is located on a line connecting the open end and the closed end.
- 上記切り欠き部の開口端は閉口端よりも大きく、上記切り欠き部の二本の直線状の縁部から夫々立ち上がるフィンカラーは異なる形状であり、上記縁部の一方は、上記閉口端から上記切り欠き部が広がる方向にオフセットした位置と上記開口端を結ぶ線上に位置し、上記縁部の他方は、上記開口端と上記閉口端を結ぶ線上に位置することを特徴とする請求項2記載の熱交換器。 The opening end of the notch is larger than the closed end, the fin collars rising from the two linear edges of the notch are different in shape, and one of the edges is from the closed end to the above-mentioned closed end. 3. The position that is offset in the direction in which the notch is expanded and is located on a line that connects the opening end, and the other edge is located on a line that connects the opening end and the closing end. Heat exchanger.
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JP7001943B1 (en) | 2020-09-08 | 2022-01-20 | ダイキン工業株式会社 | Heat exchanger and air conditioner |
JP7001944B1 (en) | 2020-09-08 | 2022-01-20 | ダイキン工業株式会社 | Heat exchanger and air conditioner |
WO2022054406A1 (en) * | 2020-09-08 | 2022-03-17 | ダイキン工業株式会社 | Heat exchanger and air conditioning apparatus |
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- 2017-02-03 US US15/779,912 patent/US20180320989A1/en not_active Abandoned
- 2017-02-03 WO PCT/JP2017/003941 patent/WO2017145701A1/en active Application Filing
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Cited By (7)
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JP6958695B1 (en) * | 2020-09-08 | 2021-11-02 | ダイキン工業株式会社 | Heat exchanger and air conditioner |
JP7001943B1 (en) | 2020-09-08 | 2022-01-20 | ダイキン工業株式会社 | Heat exchanger and air conditioner |
JP7001944B1 (en) | 2020-09-08 | 2022-01-20 | ダイキン工業株式会社 | Heat exchanger and air conditioner |
WO2022054406A1 (en) * | 2020-09-08 | 2022-03-17 | ダイキン工業株式会社 | Heat exchanger and air conditioning apparatus |
JP2022045107A (en) * | 2020-09-08 | 2022-03-18 | ダイキン工業株式会社 | Heat exchanger and air conditioner |
JP2022045106A (en) * | 2020-09-08 | 2022-03-18 | ダイキン工業株式会社 | Heat exchanger and air conditioner |
JP2022045157A (en) * | 2020-09-08 | 2022-03-18 | ダイキン工業株式会社 | Heat exchanger and air conditioner |
Also Published As
Publication number | Publication date |
---|---|
JPWO2017145701A1 (en) | 2018-07-12 |
US20180320989A1 (en) | 2018-11-08 |
EP3421919A4 (en) | 2019-11-06 |
CN108779965A (en) | 2018-11-09 |
JP6479252B2 (en) | 2019-03-06 |
EP3421919A1 (en) | 2019-01-02 |
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