JP2023132563A - Heat exchanger, fin manufacturing device, fin manufacturing method, fin stack device, and fin stack method - Google Patents

Abstract

To provide a heat exchanger comprising fins having high productivity by restraining stack pins from falling under the own weight of the fins.SOLUTION: A heat exchanger according to the present disclosure comprises a plurality of tubes 12 comprising refrigerant passages, and a plurality of thermally conductive fins 11 stacked and fitted to the tubes 12. The plurality of fins 11 each comprise: a plurality of opening parts 21 formed in the longitudinal direction of the fins 11, and penetrated by the plurality of tubes 12 at predetermined intervals respectively; and notch parts 13 formed along both side surfaces in the longitudinal direction in outer peripheries of the fins 11.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to a heat exchanger, a fin manufacturing device, a fin manufacturing method, a fin stack device, and a fin stack method.

In the fins used in conventional heat exchangers, a plurality of fins are laminated and stacked by passing a stack pin through an opening into which a tube having a refrigerant passage is attached (see, for example, Patent Document 1).

Japanese Patent Application Publication No. 2015-164741

However, in the fins used in heat exchangers, multiple fins are stacked by passing the stack pin through the opening where the tube is attached, so the diameter of the stack pin depends on the diameter of the tube. do. Furthermore, in recent years, there has been a demand for heat exchangers to use less refrigerant in order to reduce the environmental load, and there is a tendency to reduce the diameter of the tubes through which the refrigerant flows. When the diameter of the tube is reduced, the diameter of the stack pin is also reduced, but this reduces the rigidity of the stack pin and causes the stack pin to fall down due to the weight of the fin. As described above, when the stack pin falls down due to the weight of the fin, there is a problem in that the productivity of the fin decreases.

The present disclosure has been made in order to solve the above problems, and aims to provide a heat exchanger having fins with high productivity by suppressing stack pins from falling down due to the weight of the fins. purpose.

A heat exchanger according to the present disclosure includes a plurality of tubes each having a refrigerant passage, and a plurality of thermally conductive fins that are stacked and attached to the plurality of tubes, and each of the plurality of fins extends in the longitudinal direction of the fin. The fin includes a plurality of openings that are formed and pass through each of the plurality of tubes at predetermined intervals, and a notch that is formed along both longitudinal sides of the outer periphery of the fin.

According to the present disclosure, it is possible to provide a heat exchanger having fins with high productivity by suppressing stack pins from falling down due to the weight of the fins.

FIG. 1 is a partial perspective view showing a heat exchanger in Embodiment 1 of the present disclosure. FIG. 1 is a partial perspective view showing a fin stack device in Embodiment 1 of the present disclosure. FIG. 1 is a plan view showing a fin stack device in Embodiment 1 of the present disclosure. FIG. 2 is a partial plan view and a cross-sectional view showing cutting and bending in Embodiment 1 of the present disclosure. FIG. 1 is a schematic diagram showing a fin manufacturing apparatus in Embodiment 1 of the present disclosure. FIG. 7 is a plan view showing a fin stack device in Embodiment 2 of the present disclosure. FIG. 7 is a plan view showing a fin stack device in Embodiment 3 of the present disclosure.

Embodiment 1.
The configuration of a heat exchanger in Embodiment 1 of the present disclosure will be described. In each figure, the same or corresponding components are designated by the same reference numerals.

FIG. 1 is a partial perspective view showing a heat exchanger in Embodiment 1 of the present disclosure. As shown in FIG. 1, the heat exchanger includes a plurality of plate-shaped thermally conductive fins 11 stacked at predetermined intervals, and each fin 11 is arranged at a predetermined interval along the longitudinal direction of the fins 11. A plurality of tubes 12 each having a refrigerant passage passing through the thickness direction of each fin 11, and a plurality of first tubes 12 formed along both longitudinal sides of the plurality of tubes 12 around the outer periphery of the plurality of fins 11. A notch portion (notch portion) 13 is provided. The first notch 13 is for positioning each fin 11 when stacking a plurality of fins 11, and has a semicircular shape including a curved shape.

The fins 11 are made of a metal plate material with high thermal conductivity such as aluminum (Al) or an aluminum alloy, and have a thickness of 0.09 mm to 0.12 mm, a fin width of 10 mm to 25 mm, and a tensile strength. It has a strength of 100 N/mm ² or more and a rigidity. Openings (described later) through which a plurality of tubes 12 pass through and first notches 13 are formed in the plate-shaped metal using a press device, and the metal is cut into strips to form the fins 11 .

The tube 12 is made of a metal plate having high thermal conductivity, such as copper (Cu) or a copper alloy, and has a diameter of, for example, 6.8 mm to 7.2 mm. A plurality of tubes 12 are inserted through openings (described later) of a plurality of stacked fins 11.

FIG. 2 is a partial perspective view showing the fin stack device in Embodiment 1 of the present disclosure. Further, FIG. 3 is a plan view showing the fin stack device in Embodiment 1 of the present disclosure. As shown in FIGS. 2 and 3, the fin stack device is provided with first stack pins 22 that are a plurality of rod-shaped stack pins each having a needle-shaped tip. The plurality of first stack pins 22 are provided vertically upward on the fin stack device. The first fin 11 that has been transported from the press device and dropped in the vertical direction contacts and penetrates the plurality of first stack pins 22 at its outer periphery, and lands on a base plate (not shown). Subsequently, the second and subsequent fins 11 that are transported from the press device and fall in the vertical direction contact the plurality of first stack pins 22 on their outer peripheries, are penetrated, fall, and land on the fins 11 directly below. are stacked one after the other. This series of steps is called a fin stack. When the fins 11 are stacked on the fin stacking device, the plurality of first stack pins 22 are connected to the plurality of first stack pins 22, which are a plurality of notches formed on the outer periphery of each fin 11, around the openings 21 of the fins 11. are in contact with and guided by the notch portions 13 of each. By forming a plurality of first notches 13 on the outer periphery of the fin 11, the first stack pin 22 can guide the fin 11 while maintaining its balance.

The first stack pin 22 has a cylindrical lower portion fixed to the fin stacking device, and a sharp cylindrical upper tip portion. By forming the tip of the first stack pin 22 into a sharp cylindrical shape, when the fin 11 is conveyed from the press device and falls in the vertical direction, the tip of the first stack pin 22 is shaped like a cylinder. Since the fin stacking device has a shape that invites the first notch portion 13 of the fin 11, the fin stacking device can stack the fins 11 at a desired position.

Since the number of fins 11 stacked in the fin stack device varies depending on the model of the heat exchanger, it is desirable that the first stack pin 22 has a length that can accommodate the model with the largest number of stacked fins 11. Furthermore, as the first stack pin 22 becomes longer, its rigidity decreases, so it is desirable to select one with an appropriate thickness depending on the length.

The diameter of the first stack pin 22 and the diameter of the first notch 13 formed on the outer periphery of the fin 11 will be explained. It is desirable that the diameter of the first notch portion 13 provides a clearance with respect to the diameter of the first stack pin 22. Therefore, for example, when the diameter of the first stack pin 22 is 6.0 mm, if a clearance of 0.1 mm is provided between the diameter of the first stack pin 22 and the diameter of the first notch 13, The diameter of the first notch portion 13 will be formed to be 6.2 mm.

In the conventional fin stacking device, the first stacking pin 22 is inserted into the opening 21 of the fin 11 to stack the fins 11. Therefore, the diameter of the first stack pin 22 had to be smaller than the diameter of the tube 12. For example, if the diameter of the tube 12 is 7.0 mm and a clearance of 0.1 mm is provided between the diameter of the first stack pin 22 and the diameter of the tube 12, the diameter of the first stack pin 22 will be 6.0 mm. It will be 8mm. However, the diameters of generally available round bars used for the first stack pin 22 are 5.5 mm, 6.0 mm, 7.0 mm, 8.0 mm, etc., and the diameter of the first stack pin 22 is 6.8 mm. If the stack pin 22 is specially manufactured, the manufacturing cost will be higher than if a generally available round bar is used. Additionally, if the diameter of the tube 12 is changed to use a generally available round rod for the first stack pin 22, the amount of refrigerant flowing through the tube 12 will change, so the tube 12 will need to be redesigned. Therefore, the cost of manufacturing a new tube 12 is required.

The fin stacking device of the present disclosure inserts the first stacking pin 22 into the first notch 13 of the fin 11 and stacks the fins 11. The diameter of one stack pin 22 can be changed. As the diameter of the first stack pin 22 increases, the rigidity of the first stack pin 22 increases. Therefore, when stacking fins 11 in a fin stack device, the diameter of the first stack pin 22 is The larger the first stack pin 22 is, the harder it is to fall. In other words, if the diameter of the first notch 13 is larger than the diameter of the opening 21, it is possible to prevent the first stack pin 22 from falling. Furthermore, by inserting the first stack pin 22 into the first notch 13 of the fin 11, the diameter of the tube 12 can be made smaller than the diameter of the opening 21, reducing the amount of refrigerant flowing through the tube 12. can do. Note that when stacking a number of fins 11 on the fin stack device such that the first stack pin 22 does not fall down, the diameter of the first notch 13 may be smaller than the diameter of the opening 21.

FIG. 4 is a partial plan view and a cross-sectional view showing cutting and bending in Embodiment 1 of the present disclosure. In FIG. 4, the top view is a partial plan view of the fin stack device, and the bottom view is a sectional view taken along line AA of the top view.

As shown in FIG. 4, the fin 11 has a plurality of openings 21 through which a plurality of tubes pass through at predetermined intervals, and a plurality of first stack pins 22 which contact the outer periphery of the fin 11. A notch 13 is formed. Cut and raised openings 23 are formed around the plurality of openings 21, and the tube is passed through while contacting the cut and raised openings 23. Further, a raised first cutout 24 is formed around the plurality of first cutouts 13, and the first stack pin 22 is inserted into the raised cutout 24 of the first cutout. Penetrated in contact. Forming the first cutout part 24 around the first notch part 13 increases the rigidity of the fin 11, so when the fin 11 is transported from the press device and falls in the vertical direction. In addition, deformation due to collision with the first stack pin 22 can be prevented. The interval between the vertically stacked fins 11 is determined by the length of the opening 23 in the longitudinal direction of the tube or the length of the first notch 23 in the longitudinal direction of the first stack pin 22. It can be set depending on the length of 24.

Next, a manufacturing apparatus and a manufacturing method for manufacturing the fin 11 having such a configuration will be described. FIG. 5 is a schematic diagram showing a fin manufacturing apparatus in Embodiment 1 of the present disclosure.

As shown in FIG. 5, the fin manufacturing apparatus includes an uncoiler 41 that supplies a metal plate 42 with high thermal conductivity, and a press device (first cutting section) 43 that processes the plate 42 to form a strip. , a cut-off device (second cutting section) 47 that cuts the strip to a predetermined length to form the fins 11, and a fin stack device 50 that stacks and holds the trimmed fins 11. are doing.

The plate material 42 to be processed is a long thin metal plate and is formed to have a predetermined width. As shown in FIG. 5, the coiled plate material 42 has one end wound around an uncoiler 41 having a shaft that rotates freely, and is supplied to the press device 43 as the uncoiler 41 rotates.

The uncoiler 41 intermittently feeds the plate material 42 to the press device 43 in synchronization with the operation of the press device 43. More specifically, the press device 43 includes a movable body that grips the upper and lower surfaces of the plate material 42, and the movable body performs gripping, feeding movement, release, and return movement in synchronization with the operation of the press device 43. By repeating this process, the plate material 42 is intermittently fed into the press device 43.

The press device 43 processes the plate material 42 while intermittently feeding the plate material 42 to form a band-shaped body (not shown). The press device 43 executes a plurality of press processes for pressing the plate material 42 using a plurality of molds. These multiple pressing steps include a step of forming the opening 21 of the fin 11 and the opening 23 around the opening, and a step of forming the first notch 13 of the fin 11 and the first notch around the fin 11. The step of forming the cut and raised portions 24 of FIG.

In the step of forming the openings 21 of the fins 11 and the cut-and-raised portions 23 of the surrounding openings, a plurality of round-shaped openings 21 through which the tubes 12 pass are formed in the plate material 42 in the first pressing step. In the next pressing process, the periphery of each opening 21 is cut and raised to form a cut and raise 23 of the opening. In the step of forming the first cutout 13 of the fin 11 and the raised cutout 24 of the first cutout around the first cutout, in the first pressing step, a step is performed to allow the first stack pin 22 to pass through the plate material 42. A plurality of round cutouts are formed. In the next pressing process, the periphery of the round notch is cut and raised to form the cut and raised portion 24 of the first notch. The raised cut 24 of the first notch is formed by passing a conical mold through the round notch, thereby expanding the periphery of the round notch and elongating it into a cylindrical shape by burring. In addition, each process may be performed in parallel, or may be performed in order.

Although not shown here, the press device 43 has an inter-row cutting step in which the plate material 42 is cut into strips along the longitudinal direction using a die. Through this step, a band-shaped body having one width in the lateral direction of the fin 11 is formed. Note that in this step, each round shape formed on the strip is cut into semicircular first notches 13, but each opening 21 is not cut. Therefore, the first notch 13 divided into semicircular shapes becomes circular by arranging and matching the fins 11 in adjacent rows along the longitudinal direction of the fins. That is, when stacking the fins 11 to be described later on the fin stacking device 50, the semicircular first notch 13 formed on the outer periphery of each fin 11 used for positioning the fins 11 allows each fin 11 to Holes are punched out between the rows of each fin 11 so as to be equally divided in the row direction.

The semicircular first notches 13 are formed along both side surfaces of the fin 11 in the longitudinal direction, which is the width direction, so as not to face each other. Thereby, it is possible to suppress a decrease in the overall rigidity of the fin 11 due to the formation of narrow portions of the fin 11 along both sides of the fin 11 in the longitudinal direction, which is the width direction.

The conveyance roller 44 has a configuration in which a coupling (not shown) is attached to the output shaft of a servo motor (not shown), and is operated and stopped by commands from an external controller. The conveyance roller 44 conveys the pressed strip from the press device 43 to the cutoff device 47. Note that the conveyance roller 44 includes a conveyance pin 45, and the conveyance pin 45 is inserted into, for example, the opening 21 or the first notch 13 of the strip-like object to convey the strip-like object.

The suction conveyance section 46 has a large number of suction holes on the surface for conveying the strip, uses a vacuum generator to suck the strip, and conveys the strip by the length of the product by the conveyance rollers 44 . Thereafter, the cutoff device 47 cuts the strip to the length of the product, that is, the length of the fins 11, thereby forming the fins 11. When the cutting by the cutoff device 47 is completed, the vacuum generator is stopped, air is discharged from the suction hole, and the fin 11 is removed from the suction conveyance section 46 to the fin stacking device 50.

After the fins 11 are removed, a new strip is sent from the press device 43 to the suction conveyance unit 46 by the conveyance rollers 44, so the fin suction conveyance unit 46 again uses the vacuum generator to suck air from the suction holes. , prepare to transport a new strip.

The cutoff device 47 includes an upper blade 48 and a lower blade 49. The cut-off device 47 is a so-called scissor-like mechanism that performs shearing and breaking using a shear angle and a clearance set to 10% or less of the thickness of the workpiece, and has a long blade along the width direction of the fin 11. are placed, one each at the top and bottom. The cutoff device 47 cuts the strip to a predetermined length by lowering the upper blade 48 toward the lower blade 49 to form the fins 11, and then raises the upper blade 48 from the lower blade 49. to return to the standby position.

The timing at which the cutoff device 47 cuts the strip is when the strip has reached the length of the product. Therefore, while the plate material 42 is being processed by the press device 43, that is, while the plate material 42 is stopped, the cutting of the strip by the cutoff device 47 and the separation from the suction conveyance section 46 are performed at a timing earlier than the start of conveyance of the next plate material 42. It is desirable to complete the process.

The fin stacking device 50 has a function of stacking the fins 11. The fin stacking device 50 stacks the fins 11 cut to a predetermined length by the cutoff device 47 on the first stacking pin 22 . Specifically, the fin stacking device 50 includes a base plate 51 on which the fins 11 are stacked, and a plurality of first stack pins 22 provided through the base plate 51. When stacking the fins 11, the first notch 13 formed on the outer periphery of the fin 11 is contacted.

When stacking the fins 11 on the fin stacking device 50, in the process of the fins 11 falling toward the base plate 51, the first stacking pin 22 forms a semicircular shape with a curved cross section formed on each fin 11. By contacting a part of the first notch 13, the falling position is adjusted. Since the first cutout portion 13 has a semicircular shape including a curved shape, it is possible to prevent scratches from occurring when the first stack pin 22 comes into contact with the first notch portion 13 . Furthermore, the semicircular first notch 13 can be prevented from being deformed when it comes into contact with the first stack pin 22 by increasing the rigidity due to the raised cut 24 of the first notch. .

Next, a method for manufacturing the fin 11 executed by the fin manufacturing apparatus having the above configuration will be described with reference to FIG. 5.

One end of the long plate material 42 is wound around the uncoiler 41 in a coil shape, and as the uncoiler 41 rotates, it is pulled out from here and fed intermittently into the press device 43.

The press device 43 performs a press operation using a mold in synchronization with the intermittent feeding operation of the plate material 42 . Each time the plate material 42 is conveyed one pitch, the press device 43 cuts and raises the plurality of openings 21 and the plurality of openings around them, and cuts and raises the plurality of first notches 13 and the plurality of openings around the surroundings. A raised cutout 24 of the first cutout portion is formed respectively. The press device 43 executes a plurality of press steps of pressing the plate material 42 with a plurality of dies. These pressing steps include a step of forming the opening 21 of the fin 11 and the opening 23 around the opening, and a step of forming the first notch 13 of the fin 11 and the first notch around the fin 11. The method is comprised of a step of forming a raised 24.

In the step of forming the openings 21 of the fins 11 and the cut-and-raised portions 23 of the surrounding openings, a plurality of round-shaped openings 21 through which the tubes 12 pass are formed in the plate material 42 in the first pressing step. In the next pressing process, the periphery of each opening 21 is cut and raised to form a cut and raise 23 of the opening. In the step of forming the first cutout 13 of the fin 11 and the raised cutout 24 of the first cutout around the first cutout, in the first pressing step, a step is performed to allow the first stack pin 22 to pass through the plate material 42. A plurality of round first notches 13 are formed. In the next pressing step, the periphery of each first notch portion 13 is cut and raised to form a cut and raised portion 24 of the first notch portion.

The belt-shaped body transports the fins 11 by a predetermined length, that is, the length of the product, by the transport pins 45 of the transport rollers 44 . At that time, the conveying pin 45 may be inserted into the opening 21 or the first notch 13 of the strip.

The cutoff device 47 cuts the strip to a predetermined length to form the fins 11.

The fin stacking device 50 stacks the fins 11 cut to a predetermined length by the cutoff device 47 on the first stacking pin 22 . The first stack pin 22 is in contact with a first notch 13 formed on the outer periphery of the fin 11. By repeating the above steps, the fin stacking device 50 can stack a specific number of fins 11.

The fin 11 is manufactured from the elongated metal plate 42 through such a manufacturing process performed by the fin manufacturing apparatus.

As described above, according to Embodiment 1 of the present disclosure, the heat exchanger includes a plurality of tubes 12 having refrigerant passages, and a plurality of thermally conductive fins 11 stacked and attached to the tubes 12. Each of the plurality of fins 11 has a plurality of openings 21 formed in the longitudinal direction of the fin 11 and passing through each of the plurality of tubes 12 at predetermined intervals, and a plurality of openings 21 formed in the longitudinal direction of the fin 11 on the outer periphery of the fin 11. A first notch portion 13 formed along both side surfaces of.

The heat exchanger of the present disclosure is provided with the first cutout portion 13, thereby suppressing the first stack pin 22 from falling down due to the weight of the fins 11, and providing a heat exchanger having fins with high productivity. can be provided.

Further, according to the first embodiment of the present disclosure, there is provided a fin manufacturing apparatus for manufacturing the fins 11 attached to the tubes 12 having refrigerant passages, in which a predetermined interval is formed in the longitudinal direction of the thermally conductive plate material 42. A press that forms a plurality of openings 21 through which a plurality of tubes 12 are passed through, and a first notch 13 that contacts the first stack pin 22 on the outer periphery of the plate material 42 to form a band-shaped body. It includes a device 43 and a cutoff device 47 that cuts the strip to a predetermined length to form the fins 11.

The fin manufacturing apparatus of the present disclosure suppresses the first stack pin 22 from falling down due to the weight of the fin 11 by forming the first notch 13 in the fin 11, thereby improving productivity. A heat exchanger with tall fins can be provided.

Further, according to Embodiment 1 of the present disclosure, there is provided a fin manufacturing method for manufacturing the fin 11 attached to the tube 12 having a refrigerant passage, in which a predetermined interval is formed in the longitudinal direction of the thermally conductive plate material 42. A plurality of openings 21 are formed through which the plurality of tubes 12 are passed through, and a first notch 13 is formed on the outer periphery of the plate material 42 with which the first stack pin 22 comes into contact. The method includes a first cutting step and a second cutting step of cutting the strip into a predetermined length to form the fins 11.

The fin manufacturing method of the present disclosure includes the first cutting step of forming the first notch 13 in the fin 11, thereby preventing the first stack pin 22 from falling down due to the weight of the fin 11. Therefore, it is possible to provide a method for manufacturing fins with high productivity.

Further, according to the first embodiment of the present disclosure, the fin stack device 50 includes the base plate 51 on which the fins 11 are stacked, and the plurality of rod-shaped first stack pins 22 provided on the base plate 51. The first stack pin 22 has a first stack pin 22 formed on the outer periphery of the fin 11 around a plurality of openings 21 formed inside the fin 11 through which a plurality of tubes 12 having refrigerant passages pass. It comes into contact with the notch 13.

The fin stack device 50 of the present disclosure suppresses the first stack pin 22 from falling down due to the weight of the fins 11 due to the first stack pin 22 contacting the first notch portion 13, and improves productivity. A heat exchanger having fins with high properties can be provided.

Further, according to the first embodiment of the present disclosure, in the fin stacking method, the first notch portion is formed on the outer periphery of the fin 11 in the vicinity of the opening portion 21 through which the tube 12 having the refrigerant passage is penetrated. Step 13 includes a contacting step of bringing the plurality of first stack pins 22 provided on the base plate 51 into contact, and a laminating step of laminating the fins 11 on the base plate 51.

The fin stacking method of the present disclosure includes a contact step of bringing the first stack pin 22 into contact with the first notch 13, thereby suppressing the first stack pin 22 from falling down due to the weight of the fin 11. Therefore, it is possible to provide a method of stacking fins with high productivity.

(Modification of Embodiment 1)
In the fin 11 , the first cutout portion 24 may not be formed around the first cutout portion 13 . Since the raised cut 24 of the first notch is not formed, the area in which the fin 11 comes into contact with the first stack pin 22 becomes smaller when falling from the suction conveyance section 46 toward the base plate 51. Friction with the first stack pin 22 can be reduced. In addition, in the pressing process for forming the raised cut 24 of the first notch, a conical mold is passed through the first notch 13, thereby expanding the circumference of the first notch 13. By omitting the burring process to stretch the heat exchanger into a cylindrical shape, the cost of manufacturing the heat exchanger having the fins 11 can be reduced.

Embodiment 2.
The configuration of a heat exchanger in Embodiment 2 of the present disclosure will be described. FIG. 6 is a plan view showing a fin stack device in Embodiment 2 of the present disclosure. The other configuration of the heat exchanger according to Embodiment 2 of the present disclosure is the same as the configuration of the heat exchanger according to Embodiment 1 of the present disclosure.

As shown in FIG. 6, second notches 32, which are a plurality of notches formed in the longitudinal direction of the plurality of tubes, are formed on the outer periphery of the plurality of fins 11. The second notch 32 is for positioning each fin 11 when stacking a plurality of fins 11, and has a triangular shape including a linear shape.

The second stack pin 31, which is a stack pin, has a lower portion fixed to the fin stack device 50 in the shape of a square prism, and an upper tip portion in the shape of a sharp square prism. By forming the tip of the second stack pin 31 into a sharp square prism shape, when the fin 11 is conveyed from the press device 43 and falls in the vertical direction, the tip of the second stack pin 31 is Since the fin stacking device 50 has a shape that invites the second notch portion 32 of the fin 11, the fin stacking device 50 can stack the fins 11 at a desired position.

A raised second cutout 25 is formed around the plurality of second cutouts 32, and the second stack pin 31 contacts the raised cutout 25 of the second cutout. It has been penetrated in the state. The rigidity of the fin 11 is increased by forming the raised cut 25 of the second notch 32 around the second notch 32, so that the fin 11 falls from the suction conveyance unit 46 toward the base plate 51. When doing so, deformation due to collision with the second stack pin 31 can be prevented.

As described above, according to the second embodiment of the present disclosure, the fin 11 includes the second notch 32 having a triangular shape including a linear shape on the outer periphery of the fin 11.

The heat exchange efficiency of the fin 11 is improved because the second notch 32 having a triangular shape including a straight line has a larger surface area than when a semicircular notch is formed. A heat exchanger with high fins can be provided.

Embodiment 3.
The configuration of a heat exchanger in Embodiment 3 of the present disclosure will be described. FIG. 7 is a plan view showing a fin stack device in Embodiment 3 of the present disclosure.

Embodiment 3 of the present disclosure differs from Embodiment 1 of the present disclosure in the configuration regarding the notch formed in the fin 11 and the position of the cut-up around the notch. The other configuration of the heat exchanger according to Embodiment 2 of the present disclosure is the same as the configuration of the heat exchanger according to Embodiment 1 of the present disclosure.

As shown in FIG. 7, the semicircular first notches 13 are formed opposite to each other along both side surfaces of the fin 11 in the longitudinal direction, which is the width direction. When the aluminum or aluminum alloy used as the material of the fin 11 is heat-treated to ensure rigidity, the semicircular first notch 13 is formed on both sides of the fin 11 in the longitudinal direction, which is the width direction. By forming the fins 11 to face each other along the fins, the fins 11 have a simple shape, and a heat exchanger having fins with high productivity can be provided.

Embodiment 1, Embodiment 2, and Embodiment 3 of the present disclosure may be freely combined within the scope of the disclosure, and each embodiment may be modified or omitted as appropriate. can.

Reference Signs List 11 fin, 12 tube, 13 first notch (notch), 21 opening, 22 first stack pin (stack pin), 23 opening opening, 24 first notch notching Raise, 25 Cut and raise the second notch, 31 Second stack pin (stack pin), 32 Second notch (notch), 41 Uncoiler, 42 Plate material, 43 Press device (first cutting section), 44 conveyance roller, 45 conveyance pin, 46 suction conveyance section, 47 cut-off device (second cutting section), 48 upper blade, 49 lower blade, 50 fin stack device, 51 base plate.

Claims (11)

a plurality of tubes each having a refrigerant passage;
a plurality of thermally conductive fins stacked and attached to the plurality of tubes;
Each of the plurality of fins is
a plurality of openings formed in the longitudinal direction of the fin and passing through each of the plurality of tubes at predetermined intervals;
a notch formed along both longitudinal sides of the outer periphery of the fin;
Heat exchanger with. The heat exchanger according to claim 1, wherein a plurality of said notches are formed. The heat exchanger according to claim 2, wherein the plurality of notches are formed along both sides in the longitudinal direction on the outer periphery of each of the plurality of fins so as not to face each other. 3. The heat exchanger according to claim 2, wherein the plurality of notches are formed to face each other along both longitudinal side surfaces on the outer periphery of each of the plurality of fins. The heat exchanger according to any one of claims 1 to 4, wherein the cutout portion has a curved shape. The heat exchanger according to any one of claims 1 to 5, wherein the diameter of the notch is larger than the diameter of the tube. The heat exchanger according to any one of claims 1 to 4, wherein the cutout portion has a linear shape. A fin manufacturing device for manufacturing fins attached to a tube having a refrigerant passage, the fin manufacturing device comprising:
A plurality of openings are formed in the longitudinal direction of a thermally conductive plate material through which a plurality of tubes are passed through at predetermined intervals, and a notch portion is formed on the outer periphery of the plate material for contacting a stack pin. a first cut forming a
a second cutting section that cuts the strip to a predetermined length to form fins;
Fin manufacturing equipment equipped with A fin manufacturing method for manufacturing a fin attached to a tube having a refrigerant passage, the method comprising:
A plurality of openings are formed in the longitudinal direction of a thermally conductive plate material through which a plurality of tubes are passed through at predetermined intervals, and a notch portion is formed on the outer periphery of the plate material for contacting a stack pin. a first cutting step to form a
a second cutting step of cutting the strip to a predetermined length to form fins;
A method for manufacturing fins. a base plate on which the fins are laminated;
a plurality of rod-shaped stack pins provided on the base plate;
Equipped with
The stack pin contacts a notch formed on the outer periphery of the fin around an opening formed inside the fin through which a tube including a refrigerant passage passes.
Fin stack device. A contact step of bringing a plurality of stack pins provided on the base plate into contact with a notch formed on the outer periphery of the fin around an opening formed inside the fin through which a tube with a refrigerant passage passes. and,
a laminating step of laminating the fins on the base plate;
Fin stacking method with.

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