JP5390417B2 - Heat exchanger and manufacturing method thereof - Google Patents

Description

  The present invention relates to fins, tube-type heat exchangers, and methods for manufacturing the same.

  Conventional heat exchangers are arranged at regular intervals, plate-like fins through which air flows, and flatness that extends in a direction perpendicular to the fin surface so as to penetrate the fins and into which refrigerant flows. It consists of a heat transfer tube (flat tube) with a shape. There are a plurality of flat tubes that are inserted perpendicularly to the fin surface, and the flat tubes are arranged stepwise with the flat surfaces facing each other. A hole (insertion hole or insertion groove) into which a flat tube is inserted is provided in each plate-like fin arranged in a large number at appropriate intervals, and a flat plate surface of the plate-like fin is provided at the edge of the insertion hole. Thus, a fin collar protruding in a substantially vertical direction is formed. Moreover, a slit group for promoting heat transfer is provided in the plate-like fin portion between the flat tubes arranged in a step shape. And the slit group is arrange | positioned so that the side edge part of each slit may oppose a wind direction, and is arrange | positioned with a certain angle with respect to the wind direction. And the flat tube and plate-shaped fin which were inserted in this insertion hole are joined by the brazing material and the adhesive agent (for example, refer patent document 1).

JP 2002-139282 A

In the conventional heat exchanger, fins and flat tubes (tubes having a flat cross-sectional shape) are joined by metal joining (brazing). However, in order to reduce the manufacturing cost, it is necessary to join the fin and the flat tube using a low-cost adhesive instead of brazing. Since the low-cost adhesive does not contain a filler for promoting heat transfer, the thermal conductivity is as low as 0.1 to 0.2 W / m ² K (about 1/1000 of metal). Considering the conductivity, it is necessary to suppress the gap between the flat tube and the fin to several μm (to achieve a clearance of several μm). However, when the flat tube is press-fitted into the fin, the strength of the fin is insufficient, so that the fin is distorted and the gap between the fin and the flat tube is several tens of μm. When gaps of several tens of μm are joined with an adhesive that does not contain a filler, there is a problem that the thermal conductivity deteriorates and sufficient performance as a heat exchanger cannot be obtained.

  The present invention has been made to solve the above-described problems, and is to obtain a heat exchanger having a structure capable of suppressing the gap between the fin and the flat tube to several μm and a method for manufacturing the same. Objective.

The heat exchanger according to the present invention comprises a plurality of flat fins, the fin portions that are spaced apart so that the plane portions of the fins are parallel to each other, the cross section is a flat shape, A heat transfer tube having a plurality of straight pipe portions extending linearly and having a chamber for flowing a conductive medium, and holding the plurality of straight pipe portions of the heat transfer tubes in parallel with each other, A plurality of straight pipe portions are inserted into the fin portion so that the plane portion of the fin is orthogonal to the extending direction of the straight pipe portion ; The fixing member is a plate-like member having an insertion groove into which the heat transfer tube is inserted. The fixing member is assembled with the heat transfer tube by fitting the heat transfer tube into the insertion groove, and the insertion groove of the fixing member is filled. With above heat transfer tube by glue The fixing member is fixed, and is characterized in that to check the adhesive filling of the said insertion groove by adhesive filled in the adhesive filling confirmation groove formed in a deep portion of the insertion groove.

In the heat exchanger manufacturing method according to the present invention, a plurality of straight pipe portions extending in a straight line of a heat transfer pipe having a flat cross section and having a chamber for flowing a heat conduction medium therein are fixed members. And holding the parallel pipes at a predetermined interval apart in the flat minor axis direction of the straight pipe part, and inserting the straight pipe parts and the plurality of straight pipe parts fixed by the fixing member Insert the straight pipe part into the straight pipe part insertion groove so that the flat part of the fin is perpendicular to the direction in which the straight pipe part extends with the flat fin provided with the straight pipe part insertion groove The fixing member is a plate-like member having an insertion groove into which the heat transfer tube is inserted, and is assembled with the heat transfer tube by fitting the heat transfer tube into the insertion groove, The contact filled in the insertion groove of the fixing member The heat transfer tube and the fixing member are fixed by an agent, and the adhesive filling confirmation groove provided in the deep portion of the insertion groove is filled with the adhesive, thereby confirming the filling of the adhesive into the insertion groove. To do .

  According to the heat exchanger of the present invention, the mutual positions of the plurality of straight pipe portions of the heat transfer tube can be fixed by the fixing member. Therefore, when the heat transfer tube is assembled by press-fitting the fin and the heat transfer tube, the heat transfer tube is displaced. It is possible to prevent the deformation of the fin caused by the above, and to reduce the gap generated between the heat transfer tube and the fin as compared with the case where the fixing member is not used.

  According to the heat exchanger manufacturing method of the present invention, the mutual positions of the plurality of straight pipe portions of the heat transfer tube are fixed by the fixing member, and then the heat transfer tubes and the fins are assembled by press fitting. The deformation of the fins to be prevented can be prevented, and the gap generated between the heat transfer tubes and the fins can be made smaller than when no fixing member is used.

It is a top view of the fin which showed the fitting part of the fin of the heat exchanger of Embodiment 1 of this invention, and a heat exchanger tube. It is a top view of the fin which showed the fitting part of the fin and heat exchanger tube of a heat exchanger when a deformation | transformation of a fin arises. It is a top view of the fixing member which showed the fitting part of the fixing member of Embodiment 1 of this invention and a heat exchanger tube. It is a top view which shows arrangement | positioning with the heat exchanger tube and fixing member of Embodiment 1 of this invention. It is a perspective view of the heat exchanger of Embodiment 1 of the present invention. It is an expansion perspective view of a fin. It is sectional drawing along the AA line of FIG. 1 which shows the fitting state of the fin of Embodiment 1 of this invention, and a heat exchanger tube. It is sectional drawing along the BB line of FIG. 2 which shows the fitting state of a fin and a heat exchanger tube when a deformation | transformation of a fin arises.

It is sectional drawing which shows the fitting state of the fin and heat exchanger tube of Embodiment 1 of this invention. It is a top view which shows the example which adhered and fixed the fitting part of the fixing member and heat exchanger tube of Embodiment 1 of this invention. It is a top view which shows arrangement | positioning with the heat exchanger tube of Embodiment 2 of this invention, and a fixing member. It is a perspective view of the heat exchanger of Embodiment 3 of this invention. It is a top view of the fixing member which showed the fitting part of the fixing member which provided the groove | channel for adhesive confirmation of Embodiment 4 of this invention, and a heat exchanger tube. It is the top view of the fixing member which showed the fitting part of the fixing member which provided the burr part in the opening end of the insertion groove of Embodiment 5 of this invention, and a heat exchanger tube. It is a top view of the fixing member which showed the fitting part of the fixing member which combined the lid member with the wedge of Embodiment 5 of this invention, and a heat exchanger tube. It is a top view of the fixing member which showed the fitting part of a fixing member and a heat exchanger tube which pinches and hold | maintains a heat exchanger tube with the two fixing plates of Embodiment 6 of this invention. It is the top view of the fixing member which showed the fitting part of a fixing member and a heat exchanger tube which provided the projection part which collides with the other fixing plate in one side of the fixing plate of Embodiment 6 of this invention.

Embodiment 1 FIG.
First, an assembly state when a heat transfer tube (flat tube) is inserted into a flat fin that is a main component of a heat exchanger (flat tube heat exchanger) will be described. Here, the straight heat transfer tube portion constituting the heat exchanger is particularly referred to as a straight tube portion. In the heat exchanger of the present invention, the fitting state between the straight tube portion of the heat transfer tube and the flat fins is discussed, and in the following description, the heat transfer tube refers to the straight tube portion. In addition, the heat transfer tube includes a bent portion connecting adjacent straight tube portions, a piping portion drawn out of the heat exchanger, and the like in addition to the straight tube portion extending linearly used as a heat exchanger. The heat conduction medium is made to flow in the internal chamber.

As shown in FIG. 1, when assembled with high precision so that the gap between the heat transfer tube 2 and the fin 1 is a size of up to several μm (so that the clearance is several μm), The flat plate surface of the plate-like fins 1 is arranged so as to be perpendicular to the extending direction of the heat transfer tube (straight tube portion) 2 having a flat cross section, and the fin 1 is indicated by a broken line without distortion. The center line in the width direction of the fin 1 (the same direction as the flat short axis direction of the inserted flat tube) is linear.
On the other hand, as shown in FIG. 2, when the assembly accuracy of the fin 101 and the heat transfer tube (straight tube portion) 102 is poor, the fin 101 is distorted, and the center line (broken line) in the width direction of the fin 101 is It was bent and the gap between the heat transfer tube 102 and the fin 101 was increased to several tens of μm.

  As for the distortion of the fin 101, the plate thickness of the aluminum fin 101 is as thin as about 0.1 mm, and the insertion grooves (or insertion holes) 101a to 101c for fitting the heat transfer tubes 102 (2) are provided. One of the reasons is that the member has a lack of rigidity, and the force when the heat transfer tube 102 is press-fitted into the insertion groove 101a of the fin 101 is reduced in the width direction of the fin 101 (in FIG. This corresponds to the direction of the flat major axis of the tube). In the present invention, the fin 1 has the same shape and the same material as the conventional one, and this distortion is solved by improving other configurations.

  In the conventional method of assembling the fins 101 and the heat transfer tubes 102, one heat transfer tube 102 or a plurality of heat transfer tubes 102 at a time are provided to the fin portion composed of a large number of fins 101 continuously arranged so that the flat plate surfaces are parallel. Assembling is performed by press-fitting or assembling by press-fitting the fins 101 one by one into the plurality of heat transfer tubes 102. In any case, the distortion of the fins 101 as shown in FIG. Has occurred.

In the conventional assembly method, the plurality of heat transfer tubes 102 are separated one by one before assembly with the fin 101, and the mutual arrangement is not determined. It was considered that the occurrence of a deviation in the arrangement between the plurality of heat transfer tubes 102 may be one of the causes of distortion generated in the fin 101 during press-fitting.
Therefore, the inventors fixed a plurality of heat transfer tubes 2 in advance using a fixing member 3 before fitting the fins 1 and the heat transfer tubes 2 as shown in FIG. An attempt was made to prevent the mutual arrangement of the heat transfer tubes 2 from changing even when a press-fitting force was applied during assembly with the fins.

  FIG. 4 is a plan view showing a state in which the heat transfer tube 2 and the fixing member 3 are assembled. In FIG. 4, the mutual arrangement of the heat transfer tubes 2 is fixed to portions located at both end portions (in the direction in which the straight tube portion of the heat transfer tube 2 extends) of the fin portion 11 in which the fins 1 are continuously arranged in parallel. The example which has arrange | positioned the fixing member 3 is shown. Here, the thickness of the flat fixing member 3 is set to be thicker than that of the fin 1, so that rigidity is provided so that deformation does not occur due to the fitting with the heat transfer tube 2. Further, as shown in FIG. 3, the insertion grooves 3 a for fitting the heat transfer tubes 2 to the fixing members 3 are arranged at equal intervals in the length direction of the fixing members 3. Each of the plurality of straight pipe portions can be held in parallel to each other, and can be fixed at a predetermined interval in the flat short axis direction of the straight pipe portions.

  When the heat transfer tube 2 and the fixing member 3 are assembled as shown in FIG. 4 and then the fins 1 are further assembled, a heat exchanger 100 of the present invention is obtained (corresponding to FIG. 5 described later). As for the assembly procedure of the fins 1, after fixing the mutual arrangement of the plurality of heat transfer tubes 2 by the fixing member 3, the fins 1 are assembled by press-fitting the fins 1 one by one into the heat transfer tubes 2, or a plurality of fins 1 arranged in parallel continuously in advance. The heat transfer tubes 2 fixed by the fixing member 3 can be press-fitted and assembled, or either method can be selected. However, the assembly shown in FIG. A fitting state was obtained, and the gap between the fin 1 and the heat transfer tube 2 could be suppressed to a size of several μm.

Next, Embodiment 1 of the heat exchanger of the present invention in which the mutual arrangement of the plurality of heat transfer tubes 2 is fixed by the fixing member 3 will be described in more detail.
FIG. 5 is a perspective view of the heat exchanger according to Embodiment 1 of the present invention. The fin plan view of the portion indicated by line CC in FIG. 5 corresponds to FIG. 1, and the heat transfer tube 2 is fitted and disposed in the insertion groove (straight tube portion insertion groove) 1 a of the fin 1. In addition, it is comprised so that air may be introduced from the arrow direction in FIG. 1, and it may pass between fins and may perform heat exchange. FIG. 6A is a perspective view of a heat exchanger fin (fin, plate-like fin) according to Embodiment 1 of the present invention, and FIG. 6B is an enlarged view of a region E surrounded by a solid line in FIG. FIG. 3 is a perspective view showing a state where the heat transfer tube 2 is inserted into the fin portion 11. In addition, the fixing member top view including the fitting part of the heat exchanger tube 2 and the fixing member 3 of the part shown by the DD line | wire of FIG. 5 is equivalent to FIG.

Furthermore, in FIG. 7, the schematic diagram which shows the fitting state of the fin part and heat exchanger tube of the heat exchanger by this invention is shown, and in FIG. 8, as a comparative example, the fin part and heat exchanger tube of the conventional heat exchanger are shown. The schematic diagram which shows a fitting state is shown.
As shown in FIG. 5, the heat exchanger 100 of the present embodiment includes a plurality of flat plate-like fins 1 arranged in parallel at a predetermined interval, and a plurality of cross-sections joined to the fins 1 have a flat shape. A certain heat transfer tube (flat tube. As described above, in the present invention, the straight tube portion used in the heat exchanger is described as a straight tube portion in particular) 2, and at both ends of the heat transfer tube (straight tube portion) 2, A fixing member 3 provided with an insertion groove 3a for inserting the heat transfer tube 2 is provided. The fixing member 3 is configured to have sufficient rigidity for suppressing deformation during insertion of the heat transfer tube 2. ing. The heat transfer tube 2 is provided with a plurality of chambers 2a for flowing a medium (heat conducting medium) of a heated AC body. As indicated by the arrows in FIG. 1, the air introduced into the heat exchanger 100 along the fin plane flows between the fins 1 in the flat major axis direction (or indicated as the row direction), and in the heat transfer tube 2. It is configured to exchange heat with the medium flowing in the.

  As shown in FIG. 1, the flat fin 1 is provided with a plurality of insertion grooves 1a into which the heat transfer tubes 2 are inserted in the flat minor axis direction (denoted as the step direction) of the insertion grooves 1a. As shown in FIG. 6A, a fin collar 4 is formed at the edge of the insertion groove 1a so as to protrude from the flat plate surface of the fin 1 in a substantially vertical direction. The rising corner portion of the fin collar 4 is rounded, and the roundness R is about 0.2 to 0.4 mm. The shape of the insertion groove 1 a is a flat shape similar to the cross section of the flat heat transfer tube 2. In addition, the fin 1 is provided with a slit 5 which is a ventilation mechanism for improving heat exchange efficiency between insertion grooves 1a arranged in parallel at a predetermined interval in the step direction.

  The material of the fin 1 is generally aluminum or an aluminum alloy, and the plate thickness is generally 0.09 to 0.12 mm. The surface of the fin material made of aluminum or aluminum alloy is generally provided with a resin coating having alkali, acid corrosion prevention, or hydrophilicity. The heat transfer tube 2 and the fixing member 3 are preferably made of aluminum, which is the same material as the fins 1, in order to prevent electrolytic corrosion due to different metals.

Here, for example, in the case of a heat exchanger 100 for a room air conditioner, the size is 120 ×.
At 600 mm, the number of heat transfer tubes 2 varies depending on the outer diameter of the tubes, but about 6 to 15 tubes are arranged. As for the dimensions of the heat transfer tube 2 which is a flat tube, the flat major axis is 10 to 15 mm, the short axis is 1 to 5 mm, and the thickness of the plate constituting the tube is about 0.08 to 0.2 mm. Moreover, the rigidity for preventing the distortion | strain generation | occurrence | production at the time of press fit is acquired by making the plate | board thickness of the fixing member 3 into about 2-5 mm, for example.

  As shown in FIG. 5, the heat exchanger 100 of the present embodiment is formed by inserting the heat transfer tubes 2 into the respective insertion grooves 1 a of the fins 1. That is, the heat transfer tubes 2 (straight tube portions) extend in a direction substantially perpendicular to the flat plate surface of the fins 1 to the fin portions 11 formed of a plurality of plate-like fins 1 arranged in parallel. It will be in the state inserted so that it may exist. Furthermore, in order to further increase the bonding strength between the fin 1 and the heat transfer tube 2, an adhesive (not shown) is applied to the insertion groove 1a of the fin 1 and bonded and fixed to obtain the heat exchanger 100. . In addition, it is the same as that of the past that the heat exchanger tube 2 is press-fitted and inserted along the flat major axis direction from the opening end part of the insertion groove 1a of the fin 1 toward the deep part.

  In the first embodiment, the heat exchanger 100 is fixed by press-fitting a plurality of heat transfer tubes 2 into the fixing member 3, as shown in FIG. The fins 4 are inserted into the heat tube 2 one by one, or a plurality of heat transfer tubes 2 fixed to the fixing member 3 are inserted into a fin portion 11 in which a plurality of plate-like fins 1 are arranged side by side. After applying an adhesive (not shown) between the heat transfer tube 2 and the heat transfer tube 2, the adhesive (not shown) is cured by heating and assembled. Regardless of the assembly procedure, the heat transfer tube 2 is fixed by the fixing member 3, so that it is possible to suppress the occurrence of distortion that has occurred in the fin 1 during press-fitting, and the pressure input is applied to the fin collar 4 and the heat transfer tube 2. The clearance between the heat transfer tube 2 and the fin collar 4 can be reduced to several μm.

Next, by comparing the heat exchanger 100 of the present embodiment with the conventional heat exchanger, the heat exchanger 100 of the present embodiment can sufficiently reduce the clearance between the heat transfer tube 2 and the fin collar 4. The mechanism will be described.
7 is a schematic cross-sectional view showing a fitting state of the fin 1 and the heat transfer tube 2 along the line AA in FIG. 1 in the heat exchanger according to Embodiment 1 of the present invention. 8 is a schematic diagram of a cross section of the fin 101 and the heat transfer tube 102 along the line BB in the conventional heat exchanger shown in FIG. As described above, in the conventional heat exchanger, when the heat transfer tube 102 is press-fitted into the fin 101, the press-fitted force acts in a direction that curves in an arc as shown in FIG. The opening width of the insertion grooves 101a to 101c of the fin 101 is partially larger than the design, and due to this distortion, the rising side surface portion of the fin collar 104 is formed on the outer surface of the heat transfer tube 102. As a result, the clearance between the fin collar 104 and the heat transfer tube 102 increases as shown in FIG. 8, and the adhesive film thickness increases the thickness of the adhesive when bonded with an adhesive that does not include a filler. Can not get performance.

  However, in the heat exchanger 100 of the present embodiment, unlike the conventional heat exchanger which is a comparative example, the end of the heat transfer tube 2 is fixed by the fixing member 3, so that the fin 1 is curved in an arc shape. 7, the fin 1 bends in the direction in which the heat transfer tube 2 extends, and the elastic force of the deflection acts in the direction of the arrow in FIG. 7 to press the fin collar 4 and the heat transfer tube 2. The collar 4 and the heat transfer tube 2 can be sufficiently brought into close contact with each other, and the clearance can be sufficiently reduced to several μm. This makes it possible to obtain sufficient thermal conductivity even when the fins 1 and the heat transfer tubes 2 are bonded by bonding using a low-cost adhesive containing no filler.

In the above example, as shown in FIG. 6, the state where the fin collar 4 protrudes substantially perpendicularly from the flat plate surface of the fin 1 is illustrated. However, as shown in FIG. The curling of the tip is effective when the heat exchanger is assembled. The fin collar 4 subjected to the flaring process can be easily arranged by bringing the tip end portion 4a of the fin collar into contact with the back side of the adjacent fin 1 when the flat surfaces of the fins 1 are continuously arranged in parallel at a predetermined interval. In the case where the fins 11 are formed by continuously standing the fins 1 side by side and the plurality of heat transfer tubes 2 fixed by the fixing members 3 are assembled to the fin portions 11, The workability of forming the part 11 can be improved.

  Further, as a method of fixing the heat transfer tube 2 and the fixing member 3, as shown in FIG. 10, an adhesive 7 is applied to the fitting portion between the heat transfer tube 2 and the fixing member 3 instead of simply press-fitting. There is also a way to fix it. In that case, if the heat transfer tube 2 and the fixing member 3 are bonded and fixed before the fin assembly, the fixing state of the heat transfer tube 2 and the fixing member 3 can be made stronger, and the strength as the heat exchanger 100 is increased. A structure resistant to vibration is obtained. Moreover, even when the heat exchanger 100 is dropped by setting the fixing member 3 to have a shape protruding outward from the fin 1, there is an advantage that the collapse of the fin 1 can be suppressed.

  In addition, after apply | coating an adhesive agent to the insertion groove | channel 3a of the fixing member 3, or the surface of the heat exchanger tube 2, the assembly by the press fit of the heat exchanger tube 2 and the fixing member 3 is carried out, and the heat exchanger tube 2 and the fixing member 3 are assembled. In some cases, an adhesive is applied to the fitting portion using a dispenser and then bonded. In addition, when the fin 1 and the heat transfer tube 2 are bonded after the fin is assembled, if the heat transfer tube 2 and the fixing member 3 are bonded together, the adhesive application step can be omitted once. Workability can be improved. Here, an epoxy adhesive is suitable for the adhesive from the viewpoint of cost and compatibility with metal.

Embodiment 2. FIG.
Next, a second embodiment of the heat exchanger of the present invention will be described. In the above-described first embodiment, the example in which the fixing members 3 are fixed to both ends of the straight pipe portion of the heat transfer tube 2 and the fin portions 11 are disposed in the region sandwiched between the two fixing members 3 has been described. In the second embodiment, as shown in the plan view of FIG. 11, one fixing member 3 is arranged at the center portion of the fin portion 11, that is, at the center portion in the length direction of the straight tube portion of the heat transfer tube 2. An example is shown.
As shown in FIG. 11, when only one fixing member 3 is arranged, the fixing member 3 is arranged at the center of the fin portion 11, thereby increasing the fixing strength between the heat transfer tube 2 and the fixing member 3. It becomes possible to make it uniform as a whole. In addition, when only one fixing member 3 is arranged at the center of the heat exchanger 100, the thickness of the fixing member 3 itself is increased as compared with the case where the fixing members 3 are arranged at both ends of the heat exchanger 100, respectively. By suppressing the movement of the heat transfer tube 2 in the flat major axis direction by using a member, or by fixing the heat transfer tube 2 and the fixing member 3 by bonding and fixing them before the fin 1 is assembled. Needless to say, the assembly accuracy can be further improved.

Embodiment 3 FIG.
FIG. 12 is a schematic perspective view of the heat exchanger 100 according to Embodiment 3 of the present invention. In the third embodiment, the fixing members 3 are arranged at the three positions of the both ends and the center of the straight pipe portion of the heat transfer tube 2. By adopting such a configuration, the bonding strength between the heat transfer tube 2 and the fixing member 3 can be increased and the deformation of the fin 1 can be suppressed, so that the clearance between the fin collar 4 and the heat transfer tube 2 can be further reduced. It becomes.

Embodiment 4 FIG.
Next, a heat exchanger according to Embodiment 4 of the present invention will be described. In Embodiment 1 described above, the fixing member 3 and the heat transfer tube 2 are fixed by the adhesive 7. In the fourth embodiment, as shown in FIG. 13, an adhesive confirmation groove (corresponding to an adhesive filling confirmation groove) 3 b is provided in the deepest part (deep part) of the insertion groove 3 a of the fixing member 3 . An example is shown. The adhesive confirmation groove 3b is formed together with the fixing member 3 when the insertion groove 3a is processed, so that the adhesive 7 is applied to the fitting portion between the fixing member 3 and the heat transfer tube 2 and then bonded. If the adhesive 7 enters the adhesive confirmation groove 3b and the groove is filled, it can be confirmed that the adhesive has been applied, which is effective for management of adhesive application.

Embodiment 5 FIG.
Moreover, it shows about the method of improving the adhesiveness of the fixing member 3 and the heat exchanger tube 2. FIG.
One is a method of attaching a burr 3c to the opening end of the insertion groove 3a of the fixing member 3 as shown in a plan view of the fixing member 3, and the burr 3 is an opening of the insertion groove 3a. In the part, it is constituted by a projection for partially reducing the opening size. After the heat transfer tube 2 is inserted into the insertion groove 3a of the fixing member 3, it is possible to prevent the heat transfer tube 2 from coming off by the action of the burr 3c, and to improve the adhesion between them.

  In another method, as shown in a plan view of the fixing member 3 in FIG. 15, the lid member 8 is used in combination with the fixing member 3 that closes the upper end of the opening of the insertion groove 3 a of the fixing member 3. A wedge 8a is inserted between the two insertion grooves 3a (a fitting groove 8b for fitting the wedge 8a is provided at the upper end of the fixing member 3), and the heat transfer tube 2 is inserted into the insertion groove between the fixing member 3 and the lid member 8. By firmly holding in 3a, the adhesiveness between the fixing member 3 and the heat transfer tube 2 is improved.

Embodiment 6 FIG.
Next, a sixth embodiment of the present invention will be described. In above-mentioned Embodiments 1-5, the example which hold | maintains the heat exchanger tube 2 using the one fixing member 3 in one fixing location was shown. In the sixth embodiment, a description will be given of a method in which two fixing plates and screws for connecting the fixing plates are used as fixing members, and a heat transfer tube is sandwiched between the fixing plates and fixed.
As shown in FIG. 16, each of the two fixing plates 33 is provided with a groove portion 33a into which the heat transfer tube 2 is inserted (shallow than the insertion groove 3a). The fixing plate 33 and the heat transfer tube 2 are fixed by fitting the heat transfer tube 2 into the groove 33a, sandwiching the heat transfer tube 2 between the two fixing plates 33, and screwing the fixing plates 33 together with screws 34. Is possible. Here, for example, if the interval between the two fixing plates 33 is too large, the workability at the time of sandwiching is deteriorated, or the fixing strength of the heat transfer tube 2 is reduced, and the contribution to the heat dissipation is also reduced. Therefore, the interval between the two fixing plates 33 is preferably 0.1 to 0.3 mm.

  In addition, as shown in FIG. 17, at least one of the two fixing plates 33 is provided with a protrusion 33b at a portion where the screw 34 is inserted, and the protrusion 33b is brought into contact with the other fixing plate 33 (protrusion). With the configuration having a contact portion, the workability at the time of sandwiching the heat transfer tube 2 can be improved, and the interval (0.1 to 0.3 mm) between the two fixed plates 33 is within a predetermined range. Therefore, it is possible to prevent the deformation of the tube due to overtightening of the screw, and it is possible to reinforce the fixing plate in the portion where the hole for inserting the screw 34 is opened.

1 Fin 1a, 3a Insertion groove,
2 Heat transfer tube 2a Chamber 3 Fixing member 3b Adhesive confirmation groove 3c Burl 4 Fin collar 4a Fin collar tip 5 Slit 7 Adhesive 8 Lid member 8a Wedge 8b Fitting groove 11, 11a Fin 33 Fixing plate 33a Groove 33b Projection 34 Screw 100 Heat exchanger.

Claims (5)

The fin part is composed of a plurality of flat fins, the fin parts are spaced apart so that the plane parts of the fins are parallel to each other, the cross section is flat, and a chamber for flowing the heat transfer medium is provided inside The heat transfer tube having a plurality of straight tube portions extending in a straight line, and holding the plurality of straight tube portions of the heat transfer tube in parallel with each other and fixing them at a predetermined interval in the flat short axis direction of the straight tube portion. A plurality of straight pipe portions are inserted into the fin portions such that the flat surface portions of the fins are orthogonal to the direction in which the straight pipe portions extend , and the fixing members include the heat transfer tubes. A plate-like member having an insertion groove to be inserted, assembled with the heat transfer tube by fitting the heat transfer tube into the insertion groove, and the heat transfer tube by an adhesive filled in the insertion groove of the fixing member. The fixing member is fixed and the insertion Heat exchanger, characterized in that to check the adhesive filling of the said insertion groove by adhesive filled in the adhesive filling confirmation groove formed in a deep portion of the groove.   2. The heat exchange according to claim 1, wherein the fixing member is fixed to both ends of the straight pipe portion of the heat transfer tube, and the fin portion is disposed in a region sandwiched between the two fixing members. vessel.   The heat exchanger according to claim 1, wherein the fixing member is fixed to a central portion of the straight pipe portion of the heat transfer tube. The heat exchanger according to claim 1, wherein the heat transfer tube and the fin are fixed by an adhesive not containing a filler. A plurality of straight pipe portions extending in a straight line of a heat transfer pipe having a flat cross section and provided with a chamber for flowing a heat conduction medium therein are held in parallel with each other by a fixing member. A step of fixing at a predetermined interval in the flat minor axis direction of the portion, a plurality of the straight pipe portions fixed by the fixing member, and a flat plate shape provided with a straight pipe portion insertion groove for inserting the straight pipe portion Including the step of assembling the fin by inserting the straight pipe portion into the straight pipe portion insertion groove so that the plane portion of the fin is orthogonal to the direction in which the straight pipe portion extends, An adhesive that has an insertion groove for inserting the heat transfer tube, is assembled with the heat transfer tube by fitting the heat transfer tube into the insertion groove, and is filled in the insertion groove of the fixing member The heat transfer tube and the fixing member are Is constant, the manufacturing method of the heat exchanger, characterized in that to check the adhesive filling of the said insertion groove by adhesive filled in the adhesive filling confirmation groove formed in a deep portion of the insertion groove.

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