WO2013069299A1 - 伝熱フィン、フィンチューブ型熱交換器及びヒートポンプ装置 - Google Patents
伝熱フィン、フィンチューブ型熱交換器及びヒートポンプ装置 Download PDFInfo
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- WO2013069299A1 WO2013069299A1 PCT/JP2012/007197 JP2012007197W WO2013069299A1 WO 2013069299 A1 WO2013069299 A1 WO 2013069299A1 JP 2012007197 W JP2012007197 W JP 2012007197W WO 2013069299 A1 WO2013069299 A1 WO 2013069299A1
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- Prior art keywords
- heat transfer
- transfer fin
- fin
- collar portion
- collar
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F28F2240/00—Spacing means
Definitions
- the present invention relates to a finned tube heat exchanger and a heat pump device using the same.
- the present invention also relates to a heat transfer fin suitable for a finned tube heat exchanger.
- heat exchangers that operate as evaporators or condensers have been used in air conditioning equipment such as home air conditioners, automotive air conditioners, commercial packaged air conditioners, and heat pump devices such as refrigerators and heat pump water heaters.
- air conditioning equipment such as home air conditioners, automotive air conditioners, commercial packaged air conditioners, and heat pump devices such as refrigerators and heat pump water heaters.
- fin-tube heat exchangers have been most commonly used in home air conditioners and commercial packaged air conditioners.
- FIG. 13 is a partial cross-sectional view of the finned tube heat exchanger 100 used in a home air conditioner, a commercial package air conditioner, or the like.
- the heat exchanger 100 includes a plurality of stacked heat transfer fins 120 and a heat transfer tube 110 penetrating the heat transfer fins 120.
- Each heat transfer fin 120 includes a cylindrical collar portion 123 (having a constant cross-sectional shape) rising from the base portion 121. From the root and the tip of the collar portion 123, the root portion 122 and the flare portion 124 are expanded radially outward while being curved. The flare portion 124 is in contact with the vicinity of the root portion 122 in the flat surface portion 121 of the adjacent heat transfer fin 120.
- the heat transfer tube 110 having an outer diameter smaller than the inner diameter of the collar portion 123 is inserted into the collar portion 123 of the stacked heat transfer fins 120, and then the heat transfer tube 110 is expanded, whereby the heat transfer tube 110 is formed.
- the collar portion 123 is brought into close contact.
- a gap 130 is formed between the flare portion 124 and the root portion 122.
- the heat transfer tubes 110 and the heat transfer fins 120 do not come into contact with each other. Therefore, the heat transfer performance from the heat transfer tubes 110 to the heat transfer fins 120 cannot be improved by the conventional general mechanical tube expansion method.
- Patent Document 1 proposes a method for improving the heat transfer from the heat transfer tubes 110 to the heat transfer fins 120.
- the gap 130 is filled by filling the gap 130 with a filler such as silicone resin and curing it.
- Patent Document 1 requires a process of filling with a filler in addition to the conventional general process, so that the process needs to be reviewed and a great amount of man-hours are generated. Furthermore, when the heat exchanger is discarded, since different materials such as fillers are added in addition to the heat transfer fins 120 and the heat transfer tubes 110 that are usually made of metal as waste materials, it becomes difficult to separate the materials. As a result, the recyclability is deteriorated and the environmental load is increased.
- the present invention uses a finned tube heat exchanger that can improve heat transfer from a heat transfer tube to a heat transfer fin without using a filler, and the finned tube heat exchanger.
- An object is to provide a heat pump device.
- an object of this invention is to provide the heat-transfer fin suitable for a fin tube type heat exchanger.
- this disclosure A base part; A cylindrical collar portion rising from the base portion; A protruding portion in which a part of the tip of the collar portion protrudes radially outward of the collar portion from the tip of the collar portion; A wall portion formed at the tip of the collar portion and extending to a region other than the overhang portion, The heat transfer fin is provided such that a height of the wall portion from the base portion is higher than a height of the protruding portion from the base portion.
- a heat transfer fin suitable for a fin tube type heat exchanger can be provided.
- FIG. 4A and FIG. 4B are enlarged cross-sectional views shown in one drawing for convenience.
- FIG. 4A and FIG. 4B are another enlarged cross-sectional views for convenience of illustration.
- the first aspect of the present disclosure is: A base part; A cylindrical collar portion rising from the base portion; A protruding portion in which a part of the tip of the collar portion protrudes radially outward of the collar portion from the tip of the collar portion; A wall portion formed at the tip of the collar portion and extending to a region other than the overhang portion, The heat transfer fin is provided such that a height of the wall portion from the base portion is higher than a height of the protruding portion from the base portion.
- the overhanging part plays a role of supporting the adjacent heat transfer fins.
- the tip of the collar portion where the overhanging portion is not provided that is, the wall portion is in contact with the heat transfer tube. Therefore, the contact area between the heat transfer fin and the heat transfer tube can be increased, and the gap between adjacent heat transfer fins can be reduced as much as possible. Therefore, the gap between adjacent heat transfer fins can be reduced as much as possible as a whole while stably stacking adjacent heat transfer fins.
- the stacked heat transfer fins come into contact with each other. Therefore, the heat transfer fins stacked as a whole are integrated to improve heat transfer performance. As a result, the heat of the fluid flowing in the heat transfer tube can be efficiently released.
- the location where the stacked heat transfer fins are not in contact may occur, when viewed as a whole, the stacked heat transfer fins are integrated as a whole and the heat transfer performance is improved.
- the heat transfer from the heat transfer tube to the heat transfer fin can be improved as compared with the conventional heat exchanger. Thereby, the heat exchange efficiency of a heat exchanger can be improved.
- a filler is not required unlike the prior art, it is easy to separate materials when the heat exchanger is discarded, and the recyclability is not deteriorated.
- the second aspect of the present disclosure provides the heat transfer fin in which at least two of the overhang portions are provided in addition to the first aspect. According to such a configuration, adjacent heat transfer fins can be stably stacked while reducing the number of overhang portions. If the number of overhang portions is reduced, the contact area between the heat transfer fin and the heat transfer tube can be increased accordingly.
- At least one of the two protruding portions extends in one direction, and the other of the at least two protruding portions is in a direction opposite to the one direction.
- An extended heat transfer fin is provided. According to such a configuration, even when the number of the overhang portions is two, it is possible to sufficiently secure the stability when the heat transfer fins are stacked.
- the fourth aspect of the present disclosure provides the heat transfer fin, in addition to the third aspect, the one direction is a direction orthogonal to a longitudinal direction of the heat transfer fin. According to such a configuration, even when the number of the overhang portions is two, it is possible to sufficiently secure the stability when the heat transfer fins are stacked.
- the one direction is ⁇ 30 degrees with respect to a straight line extending in the width direction perpendicular to the longitudinal direction of the heat transfer fin from the center of the collar portion.
- the overhanging portion has a structure that is bent outward in the radial direction as the distance from the tip of the collar portion increases.
- a heat transfer fin is provided in which a notch is provided between the projecting portion and the wall portion. To do.
- the projecting portion is formed from the outer peripheral surface of the cylindrical body constituting the collar portion.
- a heat transfer fin having a shape in which the central part of the part rises.
- the projecting portion is provided on an outer peripheral surface of a cylindrical body constituting the collar portion.
- a heat transfer fin that is a protrusion is provided.
- a transmission in addition to any one of the first to ninth aspects, includes a step portion that is curved from the base of the collar portion and is connected to the base portion to form a recess.
- the stepped portion forms a recess into which the protruding portion of the adjacent heat transfer fin enters.
- the range to be expanded by the depression formed by the step portion is restricted. Therefore, it is possible to prevent the inner diameter of the collar portion of the stacked heat transfer fins in the lower layer portion from being expanded wider than the inner diameter of the collar portion of the stacked heat transfer fins in the upper layer portion. That is, when inserting heat transfer rods into the stacked heat transfer fins, and spreading the heat transfer rods into contact with the collar portions of the heat transfer fins, the heat transfer fins and heat transfer of the stacked upper layer portions are performed. It is possible to prevent unevenness between the contact area with the heel and the contact area between the heat transfer fins and the heat transfer ridges in the lower layer portion stacked. Therefore, the heat transfer from the heat transfer tube to the heat transfer fin can be made uniform regardless of the location of the stacked heat transfer fins.
- An eleventh aspect of the present disclosure includes A base part; A cylindrical collar portion rising from the base portion; A protruding portion in which a part of the tip of the collar portion protrudes radially outward of the collar portion from the tip of the collar portion; A wall portion formed at the tip of the collar portion and extended to a region other than the overhang portion; A stepped portion that curves from the base of the collar portion and connects to the base portion to form a depression; The heat-transfer fin provided with this is provided.
- the stepped portion forms a recess into which the protruding portion of the adjacent heat transfer fin enters.
- the heat transfer fins and heat transfer of the stacked upper layer portions are performed. It is possible to prevent unevenness between the contact area with the heel and the contact area between the heat transfer fins and the heat transfer ridges in the lower layer portion stacked. Therefore, the heat transfer from the heat transfer tube to the heat transfer fin can be made uniform regardless of the location of the stacked heat transfer fins.
- a twelfth aspect of the present disclosure includes A plurality of stacked heat transfer fins; A heat transfer tube penetrating the plurality of heat transfer fins,
- the heat transfer fins are: A base part; A cylindrical collar portion rising from the base portion; A protruding portion in which a part of the tip of the collar portion protrudes radially outward of the collar portion from the tip of the collar portion; A wall portion formed at the tip of the collar portion and extending to a region other than the overhang portion, A fin-tube heat exchanger is provided in which a height of the wall portion from the base portion is higher than a height of the overhang portion from the base portion.
- the overhanging part plays a role of supporting the adjacent heat transfer fins.
- the tip of the collar portion where the overhanging portion is not provided that is, the wall portion is in contact with the heat transfer tube. Therefore, the contact area between the heat transfer fin and the heat transfer tube can be increased, and the gap between adjacent heat transfer fins can be reduced as much as possible. Therefore, the gap between adjacent heat transfer fins can be reduced as much as possible as a whole while stably stacking adjacent heat transfer fins.
- the heat transfer fins are stacked, the stacked heat transfer fins come into contact with each other. Therefore, the heat transfer fins stacked as a whole are integrated to improve heat transfer performance. As a result, the heat of the fluid flowing in the heat transfer tube can be efficiently released.
- the gap between adjacent heat transfer fins can be reduced as much as possible, a filler in the gap can be made unnecessary. When the heat exchanger is discarded, the material can be easily separated and the recyclability is improved.
- the thirteenth aspect of the present disclosure provides the finned tube heat exchanger in addition to the twelfth aspect, in which at least two projecting portions are provided. According to such a configuration, adjacent heat transfer fins can be stably stacked while reducing the number of overhang portions. If the number of overhang portions is reduced, the contact area between the heat transfer fin and the heat transfer tube can be increased accordingly.
- At least one of the two protruding portions extends in one direction, and the other of the at least two protruding portions is in a direction opposite to the one direction.
- An extended finned tube heat exchanger is provided. According to such a configuration, even when the number of the overhang portions is two, it is possible to sufficiently secure the stability when the heat transfer fins are stacked.
- the fifteenth aspect of the present disclosure provides the finned tube heat exchanger according to the fourteenth aspect, in which the one direction is a direction orthogonal to a longitudinal direction of the heat transfer fin. According to such a configuration, even when the number of the overhang portions is two, it is possible to sufficiently secure the stability when the heat transfer fins are stacked.
- the one direction is ⁇ 30 degrees with respect to a straight line extending in the width direction perpendicular to the longitudinal direction of the heat transfer fin from the center of the collar portion.
- a finned tube heat exchanger within range. According to such a configuration, even when the number of the overhang portions is two, it is possible to sufficiently secure the stability when the heat transfer fins are stacked.
- the overhanging portion has a structure that is bent outward in the radial direction as the distance from the distal end of the collar portion is increased.
- a finned tube heat exchanger is provided.
- a fin tube type heat exchange is provided in which a notch is provided between the projecting portion and the wall portion.
- a bowl is provided in which a notch is provided between the projecting portion and the wall portion.
- the projecting portion is formed from the outer peripheral surface of the cylindrical body constituting the collar portion.
- a finned tube heat exchanger having a shape in which the central part of the part rises.
- the overhanging portion is provided on an outer peripheral surface of a cylindrical body constituting the collar portion.
- a finned tube heat exchanger which is a protrusion.
- a wall portion of one heat transfer fin in the stacked heat transfer fins may include the one heat transfer fin.
- a fin tube type heat exchanger is provided which is in contact with the back surface of the base of the collar portion of another heat transfer fin stacked on the heat sink.
- a wall portion of one heat transfer fin in the stacked heat transfer fins may include the one heat transfer fin.
- a fin tube type heat exchanger is provided that is not in contact with the back surface of the base portion of the collar portion of another heat transfer fin stacked on.
- a fin provided with a stepped portion that curves from the base of the collar portion and is connected to the base portion to form a recess.
- a tube heat exchanger is provided. According to such a configuration, when the heat transfer fins are stacked, the stepped portion forms a recess into which the protruding portion of the adjacent heat transfer fin enters. As a result, when the heat transfer fins are stacked at the time of manufacturing, even if the heat transfer fins of the lower layer part are loaded by the weight of the stacked heat transfer fins, the overhanging part is pushed outward in the radial direction of the collar part.
- the range to be expanded by the depression formed by the step portion is restricted. Therefore, it is possible to prevent the inner diameter of the collar portion of the stacked heat transfer fins in the lower layer portion from being expanded wider than the inner diameter of the collar portion of the stacked heat transfer fins in the upper layer portion. That is, when inserting heat transfer rods into the stacked heat transfer fins, and spreading the heat transfer rods into contact with the collar portions of the heat transfer fins, the heat transfer fins and heat transfer of the stacked upper layer portions are performed. It is possible to prevent unevenness between the contact area with the heel and the contact area between the heat transfer fins and the heat transfer ridges in the lower layer portion stacked. Therefore, the heat transfer from the heat transfer tube to the heat transfer fin can be made uniform regardless of the location of the stacked heat transfer fins.
- the projecting portion of one heat transfer fin in the stacked heat transfer fins may include the one heat transfer fin.
- a finned tube heat exchanger that enters a recess formed by the stepped portion of another heat transfer fin stacked on the fin.
- the overhang portion of one heat transfer fin in the stacked heat transfer fins is another heat transfer fin stacked on the one heat transfer fin.
- the wall portion of one heat transfer fin in the stacked heat transfer fins may include the one heat transfer fin.
- a finned tube heat exchanger that enters the inside of the base of the collar portion of another heat transfer fin stacked on the fin.
- a twenty-seventh aspect of the present disclosure includes a compressor, a condenser, a throttle device, an evaporator, a refrigerant circuit that circulates refrigerant in the compressor, the condenser, the throttle device, and the evaporator;
- a heat pump device is provided in which at least one of the condenser and the evaporator is the finned tube heat exchanger according to any one of the twelfth to twenty-sixth aspects.
- FIG. 1 shows a finned tube heat exchanger 1 according to the first embodiment of the present invention.
- the heat exchanger 1 includes a plurality of stacked heat transfer fins 3A, a pair of side plates 20 disposed on both sides of the heat transfer fins 3A, and a plurality of U passing through the heat transfer fins 3A and the side plates 20.
- a character-shaped heat transfer tube 2 is provided.
- the heat transfer fins 3A extend in a specific direction, and the straight portions of the heat transfer tubes 2 are arranged in the longitudinal direction of the heat transfer fins 3A at a constant pitch. Both end portions of each heat transfer tube 2 protrude from the side plate 20 opposite to the folded portion that connects the straight portions, and the end portions of the adjacent heat transfer tubes 2 are connected to each other by a vent tube 21.
- Each heat transfer tube 2 is made of a metal having a high thermal conductivity such as copper.
- Each heat transfer fin 3 ⁇ / b> A is a plate-like shape obtained by press-molding a thin aluminum plate, and has a rectangular shape in plan view.
- the shape of each heat transfer fin 3A is not particularly limited as long as it extends in a specific direction.
- it may be a polygonal shape such as a rhombus or trapezoid extended in a specific direction, or an elliptical shape. It may be.
- each heat transfer fin 3A rises along the straight portion of the heat transfer tube 2 from the base portion 4 that extends around the straight portion of the heat transfer tube 2 as shown in FIGS. 2 to 4B.
- a cylindrical collar portion 5 is included.
- the direction in which the collar portion 5 rises is referred to as upward, and the opposite direction is referred to as downward.
- the collar portion 5 forms an insertion hole for inserting the heat transfer tube 2.
- the heat transfer tube 2 has an outer diameter smaller than the inner diameter of the collar portion 5 at the beginning, and is inserted into the insertion hole after the heat transfer fins 3A are stacked so that the insertion holes match. That is, a clearance is provided between the initial heat transfer tube 2 and the collar portion 5 to ensure the insertion of the heat transfer tube 2. Thereafter, the heat transfer tube 2 is expanded using a mechanical tube expansion method or the like in which the tube expansion billet is inserted into the heat transfer tube 2. Thereby, the heat exchanger tube 2 contacts the collar part 5, and it fixes so that they may be integrated coaxially.
- a root portion 55 that is curved outward from the base of the collar portion 5 and expands radially outward to connect to the base portion 4.
- a plurality of projecting portions 51 and a plurality of wall portions 52 are provided alternately in the circumferential direction above the collar portion 5. That is, the number of the overhang portions 51 and the number of the wall portions 52 are the same.
- the base portion 4 may be flat, but in the present embodiment, the base portion 4 has a waveform exhibiting a streak pattern parallel to the longitudinal direction of the heat transfer fins 3A.
- the corrugated streaks do not necessarily have to be parallel to the longitudinal direction of the heat transfer fins 3A, and may be inclined with respect to them.
- the base portion 4 includes a corrugated portion 41 having a plurality of peaks and valleys, a flat ring portion 43 surrounding the heat transfer tube 2 at the same level as the troughs of the corrugated portion 41, and the corrugated portion 41 from the outer periphery of the ring portion 43.
- a peripheral wall 42 extending in a taper shape to the mountain is included.
- the root portion 55 is connected to the inner peripheral edge of the ring portion 43.
- the overhanging portion 51 protrudes radially outward from the tip of the collar portion 5.
- the wall portion 52 is formed by extending the collar portion 5 to a region other than the overhang portion 51. In other words, the wall portion 52 is formed by extending the collar portion 5 between the overhang portions 51.
- the protruding portion 51 of one heat transfer fin 3A is in contact with the vicinity of the root portion 55 in the ring portion 43 of the other heat transfer fin 3A.
- a stepped portion 6 that is curved from the base of the collar portion 5 and is connected to the base portion 4 to form a recess is provided.
- the ring portion 43 is provided with a step portion 6 that forms a recess in which the overhang portion 51 can be fitted around the root portion 55. That is, the step portion 6 has an inner diameter larger than the diameter of the circle circumscribing the overhanging portion 51.
- the cross-sectional shape of the stepped portion 6 may be a straight line parallel or oblique to the axial direction of the collar portion 5 or may be curved.
- the heat transfer rod 2 when the heat transfer rod 2 is inserted into the stacked heat transfer fins 3A and the heat transfer rod 2 is spread and brought into contact with the collar portion 5 of the heat transfer fins 3A, the heat transfer of the stacked upper layer portions is performed. It is possible to prevent unevenness between the contact area between the heat fin 3A and the heat transfer rod 2 and the contact area between the heat transfer fin 3A and the heat transfer rod 2 in the stacked lower layer portion. Therefore, the heat transfer property from the heat transfer tubes 2 to the heat transfer fins 3A can be made uniform regardless of the location of the stacked heat transfer fins 3A.
- the overhanging portion 51 plays a role of supporting the adjacent heat transfer fins 3A when the heat transfer fins 3A are stacked. Therefore, it is desirable that the upper ends of the overhang portions 51 are all at an equal height from the ring portion 43. Moreover, it is preferable that the overhang
- the number of the overhang portions 51 is not particularly limited, it is desirable that at least two overhang portions 51 are provided. From the viewpoint of the stability in the width direction perpendicular to the longitudinal direction of the heat transfer fins 3A when the heat transfer fins 3A are stacked (in the longitudinal direction, the heat transfer fins 3A are stably supported by a plurality of projecting portions 51).
- the overhanging portion 51 is disposed at least within two angular ranges extending in the width direction of the heat transfer fin 3A from the center of the collar portion 5 (for example, a range of ⁇ 30 degrees with respect to a straight line extending in the width direction). Preferably, it includes two overhangs.
- one overhanging portion 51 is arranged within one angle range so that the center line of the three overhanging portions 51 is Y-shaped. You may arrange
- the overhanging portions 51 may be arranged one by one in both angular ranges at a position shifted from a straight line extending in the width direction through the center of the collar portion 5.
- the projecting portions 51 are projected in the opposite directions along the width direction of the heat transfer fins 3A. It is best to provide only one.
- one of the two overhang portions 51 extends in one direction.
- the other of the two projecting portions 51 extends in the direction opposite to the one direction.
- the one direction is a direction (width direction) orthogonal to the longitudinal direction of the heat transfer fins 3A.
- each overhang portion 51 is bent 90 degrees while being curved with respect to the collar portion 5 so as to shift outward in the radial direction as the distance from the tip of the collar portion 5 increases.
- the overhanging portion 51 is not necessarily curved, and may be constituted by, for example, a linear gradient portion extending obliquely from the collar portion 5 and a flange provided at the tip of the linear gradient portion.
- the angle of bending is not limited to 90 degrees.
- each projecting portion 51 is preferably smaller than the circumferential width of each projecting portion 51, and is, for example, about 1/12 to 1/5 of the circumferential length of the collar portion 5.
- projection part 51 has a corner
- projection part 51 is shown.
- the corners of the overhanging portion 51 may be rounded as shown in FIG. 7, or the shape of the overhanging portion 51 may be a crescent shape in plan view.
- the wall 52 does not have a role of supporting the adjacent heat transfer fins 3 ⁇ / b> A, but contacts the heat transfer tubes 2.
- the inner diameter of the wall portion 52 is the same as the inner diameter of the collar portion 5, and the wall portion 52 constitutes a wall surface continuous with the collar portion 5. That is, when the heat transfer fins 3A are stacked, a gap 7 is formed between the projecting portion 51 and the root portion 55 of the upper heat transfer fin 3A as shown in FIG. 4A, but as shown in FIG. 4B. Further, only a slight gap is formed between the wall portion 52 and the root portion 55 of the upper heat transfer fin 3A.
- the height B of the wall portion 52 from the (base portion 4) is higher than the height A of the protruding portion 51 from the ring portion 43 (base portion 4). That is, the wall portion 52 is higher by a difference ⁇ h between the height B of the wall portion 52 from the ring portion 43 (base portion 4) and the height A of the protruding portion 51 from the ring portion 43 (base portion 4). It has become.
- the gap 7 can be reduced by the difference ⁇ h, but also the contact area between the heat transfer fins 3A and the heat transfer tubes 2 increases, so the heat transfer area increases and the heat exchange efficiency improves.
- the height B of the wall portion 52 from the ring portion 43 (base portion 4) is lower than the height A of the protruding portion 51 from the ring portion 43 (base portion 4)
- the heat transfer fins 3A are stacked. In this case, the side surfaces of the heat transfer tubes 2 are exposed between the adjacent heat transfer fins 3A, which tends to be undesirable from the viewpoint of heat transfer efficiency.
- the stacked heat transfer fins 3A come into contact with each other. Therefore, the stacked heat transfer fins 3A are integrated as a whole to improve heat transfer. As a result, the heat of the fluid flowing through the heat transfer tube 2 can be released efficiently.
- the wall portion 52 of one heat transfer fin 3 ⁇ / b> A in the stacked heat transfer fins 3 ⁇ / b> A has a collar portion 5 of another heat transfer fin 3 ⁇ / b> A stacked on the one heat transfer fin 3 ⁇ / b> A. You may contact
- the wall portion 52 of one heat transfer fin 3A stacked on the heat transfer fin 3A is formed of the collar portion 5 of the other heat transfer fin 3A stacked on the one heat transfer fin 3A. It does not have to be in contact with the back of the base.
- the plurality of stacked heat transfer fins 3 ⁇ / b> A there may be a portion where the wall portion 52 and the bottom rear surface of the collar portion 5 are in contact with each other, and there may be a portion where they are not in contact.
- the heat transfer fins 3A are stacked at the time of manufacture, in the heat transfer fins 3A in the lower layer portion, there is a high possibility that the wall portion 52 and the bottom rear surface of the collar portion 5 come into contact with each other due to their own weight.
- the heat transfer fins 3 ⁇ / b> A in the upper layer portion there may be a place where the wall portion 52 and the bottom rear surface of the collar portion 5 do not contact each other.
- the stacked heat transfer fins 3A are integrated as a whole to improve heat transfer.
- projection part 51 of one heat-transfer fin 3A in the stacked heat-transfer fin 3A is a level
- the wall portion 52 of one heat transfer fin 3A in the stacked heat transfer fins 3A is a collar portion of another heat transfer fin 3A stacked on the one heat transfer fin 3A. It goes inside the root of No. 5. As shown in FIG.
- the protruding portion 51 of one heat transfer fin 3A in the stacked heat transfer fins 3A is a stepped portion of the other heat transfer fin 3A stacked on the one heat transfer fin 3A.
- the height B of the wall portion 52 from the base portion 4 only needs to be higher than the height A of the overhanging portion 51 from the base portion 4 in a range where it is in contact with the recess formed by 6.
- a thin linear cut is provided between each overhanging portion 51 and each wall portion 52.
- a predetermined width is used to smoothly connect them between each projecting portion 51 and each wall portion 52. It is preferable to provide a cutout 53 (an example of a cutout portion) having a circular arc bottom.
- the heat of the fluid flowing in the heat transfer tube 110 is transferred from the outer peripheral surface of the heat transfer tube 110 to the inner peripheral surface of the collar portion 123 and then conducted to the outer peripheral surface of the collar portion 123 and the upper and lower surfaces of the base portion 121.
- the heat conducted to the outer peripheral surface of the collar portion 123 and the upper and lower surfaces of the base portion 121 is transferred to the fluid flowing between the base portions 121.
- the contact thermal conductance when heat is transferred from the outer peripheral surface of the heat transfer tube 110 to the inner peripheral surface of the collar portion 5 is generally defined by the following Equation 1.
- ⁇ 1 thermal conductivity of one member constituting the contact surface (W / m ⁇ K) ⁇ 2 : thermal conductivity (W / m ⁇ K) of the other member constituting the contact surface
- P Contact pressure (MPa)
- H The hardness (Hb) of the softer one of the members constituting the contact surface ⁇ f : interposed fluid thermal conductivity (W / m ⁇ K)
- the contact thermal resistance Rc is obtained from the following equation 2 using the contact thermal conductance K obtained by the above equation 1.
- Rc 1 / (K ⁇ S) (Formula 2)
- Rc Contact thermal resistance (K / W) S: Contact area (m 2 )
- the contact fluid conductance K can be increased by increasing the interposed fluid thermal conductivity ⁇ f by changing the interposed fluid, which is usually air, to a filler.
- the material constituting the heat exchanger 100 includes the material of the filler in addition to the material of the heat transfer fin 120 and the material of the heat transfer tube 110, and at the time of product disposal. It becomes difficult to separate materials for recycling. As a result, the recyclability deteriorates, leading to a decrease in the recycling rate, an increase in energy required for recycling, and the like, increasing the environmental load.
- a method of increasing the contact thermal conductance K a method of reducing the surface roughness ⁇ 1 , ⁇ 2 of the contact surface between the heat transfer tube 110 and the collar portion 123, a method of improving the contact pressure P
- a method for improving the heat transfer coefficients ⁇ 1 and ⁇ 2 of the heat tube 110 and the heat transfer fin 120 a method for reducing the hardness H of the softer one of the heat transfer tube 110 and the heat transfer fin 120, and the like.
- the present invention focuses on a method of increasing the contact area S.
- the contact heat resistance Rc can be reduced without changing the contact heat conductance K, and the heat transfer from the heat transfer tubes 110 to the heat transfer fins 120 can be reduced. Can be improved.
- the heat exchanger 1 of the present embodiment not only the collar portion 5 but also the wall portion 52 between the overhang portions 51 is in contact with the heat transfer tube 2, so that the heat transfer tube is more than the conventional heat exchanger.
- the heat transfer property from 2 to the heat transfer fin 3A can be improved.
- the heat exchange efficiency of the heat exchanger 1 can be improved.
- a filler is not required unlike the prior art, it is easy to separate materials when the heat exchanger is discarded, and the recyclability is not deteriorated.
- a refrigerant circuit 10C is formed across the indoor unit 10A and the outdoor unit 10B.
- a compressor 11 for example, a rotary compressor
- a four-way valve 12 for example, an outdoor heat exchanger 13
- a throttle device 14 for example, an expansion valve
- a heat exchanger 15 is arranged.
- the outdoor unit 10B has an outdoor fan 16 (propeller fan as an example) that sends outdoor air to the outdoor heat exchanger 13, and the indoor unit 10A is an indoor fan 17 (as an example cross) that sends indoor air to the indoor heat exchanger 15. Flow fans) are provided.
- the high-temperature and high-pressure refrigerant compressed by the compressor 11 is guided to the indoor heat exchanger 15 during the heating operation and to the outdoor heat exchanger 13 during the cooling operation by the four-way valve 12.
- the indoor heat exchanger 15 serves as a condenser, and high-temperature refrigerant is sent from the four-way valve 12 to the indoor heat exchanger 15.
- the indoor heat exchanger 15 exchanges heat between the flowing high-temperature refrigerant heat and the indoor air heat sent by the indoor fan 17 and dissipates the heat of the refrigerant to the air to condense and liquefy the refrigerant.
- the liquefied refrigerant is adiabatically expanded by the expansion device 14, and the low-temperature and low-pressure refrigerant is sent to the outdoor heat exchanger 13.
- the outdoor heat exchanger 13 serves as an evaporator, which exchanges heat between the low-temperature refrigerant in the gas-liquid two-phase state and the outdoor air sent by the outdoor fan 16, and evaporates and evaporates the refrigerant by absorbing the heat of the air into the refrigerant.
- Let The evaporated low-pressure vaporized refrigerant is compressed again by the compressor 11. By repeating this cycle continuously, the room air is heated and heated.
- the four-way valve 12 is switched to allow the refrigerant to flow in the reverse direction, thereby cooling the room air. That is, in both the heating operation and the cooling operation, the refrigerant circulating in the refrigerant circuit 10C passes through the compressor 11, the condenser, the expansion device 14, and the evaporator in this order.
- At least one of the condenser and the evaporator is the heat exchanger 1 of this embodiment, thereby improving the heat exchange efficiency of the condenser and / or the evaporator. Can be made. As a result, the COP (coefficient of performance) of the heat pump apparatus can be improved.
- the heat transfer fin 3B having the shape shown in FIG. 9 is used.
- This heat transfer fin 3B is obtained by changing the shape of the protruding portion 51 from the heat transfer fin 3A used in the first embodiment.
- the height of the wall portion 52 from the base portion 4 is higher than the height of the protruding portion 51 from the base portion 4.
- each projecting portion 51 is continuous with the wall portions 52 on both sides, and has a shape in which the central portion in the circumferential direction gradually rises away from the tip of the collar portion 5.
- the shape of each overhanging portion 51 is a water inlet shape having a H-shaped cross section (beak-shaped cross section, V-shaped cross section).
- the overhanging portion 51 When stacking the heat transfer fins 3B, the overhanging portion 51 has a role of supporting the adjacent heat transfer fins 3B, and therefore needs to withstand the weight of all the heat transfer fins 3B located above.
- the shape of the overhanging portion 51 is a water inlet shape as in this embodiment, the section modulus can be increased, so that the strength of the overhanging portion 51 itself can be improved.
- the effect by the wall part 52 is the same as that of 1st Embodiment.
- the cross section of the overhanging portion 51 has a letter-shaped cross section, and the central portion is pointed.
- FIG. 10 is shown so that the central portion of the overhanging portion 51 does not get in the way when the heat transfer fins 3B are stacked. As described above, the central portion of the overhanging portion 51 may be smoothly curved.
- the finned-tube heat exchanger which concerns on 2nd Embodiment of this invention is demonstrated.
- the heat transfer fin 3C having the shape shown in FIG. 11 is used. This heat transfer fin 3C is obtained by changing the shape of the protruding portion 51 from the heat transfer fin 3A used in the first embodiment.
- the height of the wall portion 52 from the base portion 4 is higher than the height of the protruding portion 51 from the base portion 4.
- each overhanging portion 51 is constituted by a protrusion provided on the outer peripheral surface of the continuous cylindrical body constituting the collar portion 5 and the wall portion 52.
- the protrusion has a linear knob shape extending in the axial direction of the collar portion 5. Even with such a configuration, the same effect as in the first embodiment can be obtained.
- the finned tube heat exchanger of the present invention can be applied to air conditioning equipment such as home air conditioners, automobile air conditioners, and commercial package air conditioners, and heat pump devices used in refrigerators, heat pump water heaters, and the like.
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Abstract
Description
ベース部と、
前記ベース部から立ち上がる筒状のカラー部と、
前記カラー部の先端の一部分が前記カラー部の先端から前記カラー部の径方向外向きに張り出した張り出し部と、
前記カラー部の先端であって前記張り出し部以外の領域に延長されて形成された壁部と、を具備し、
前記ベース部から前記壁部の高さは、前記ベース部から前記張り出し部の高さより高い、伝熱フィンを提供する。
ベース部と、
前記ベース部から立ち上がる筒状のカラー部と、
前記カラー部の先端の一部分が前記カラー部の先端から前記カラー部の径方向外向きに張り出した張り出し部と、
前記カラー部の先端であって前記張り出し部以外の領域に延長されて形成された壁部と、を具備し、
前記ベース部から前記壁部の高さは、前記ベース部から前記張り出し部の高さより高い、伝熱フィンを提供する。
ベース部と、
前記ベース部から立ち上がる筒状のカラー部と、
前記カラー部の先端の一部分が前記カラー部の先端から前記カラー部の径方向外向きに張り出した張り出し部と、
前記カラー部の先端であって前記張り出し部以外の領域に延長されて形成された壁部と、
前記カラー部の根元から湾曲して前記ベース部につながり、窪みを形成する段差部と、
を具備した伝熱フィンを提供する。
積み重ねられた複数枚の伝熱フィンと、
前記複数枚の伝熱フィンを貫通する伝熱管と、を備え、
前記伝熱フィンは、
ベース部と、
前記ベース部から立ち上がる筒状のカラー部と、
前記カラー部の先端の一部分が前記カラー部の先端から前記カラー部の径方向外向きに張り出した張り出し部と、
前記カラー部の先端であって前記張り出し部以外の領域に延長されて形成された壁部と、を具備し、
前記ベース部から前記壁部の高さは、前記ベース部から前記張り出し部の高さより高い、フィンチューブ型熱交換器を提供する。
前記凝縮器と前記蒸発器との少なくとも一方が第12~第26の態様のいずれか1つに記載のフィンチューブ型熱交換器である、ヒートポンプ装置を提供する。
以下、本発明の実施形態について、図面を参照しながら説明する。ただし、本発明は、以下の実施形態によって限定されるものではない。
図1に、本発明の第1実施形態に係るフィンチューブ型熱交換器1を示す。この熱交換器1は、積み重ねられた複数枚の伝熱フィン3Aと、伝熱フィン3Aの両側に配置された一対のサイドプレート20と、伝熱フィン3A及びサイドプレート20を貫通する複数のU字状の伝熱管2を備えている。
δ1:接触面を構成する一方の部材の表面粗さ(μm)
δ2:接触面を構成する他方の部材の表面粗さ(μm)
δ0:接触相当長さ(=23μm)
λ1:接触面を構成する一方の部材の熱伝導率(W/m・K)
λ2:接触面を構成する他方の部材の熱伝導率(W/m・K)
P:接触圧力(MPa)
H:接触面を構成する部材のうち軟らかい方の硬度(Hb)
λf:介在流体熱伝導率(W/m・K)
Rc=1/(K×S) ・・・(式2)
Rc:接触熱抵抗(K/W)
S:接触面積(m2)
次に、図12を参照して、上述した熱交換器1が用いられるヒートポンプ装置の一例であるルームエアコン10を説明する。
次に、図9を参照して、本発明の第2実施形態に係るフィンチューブ型熱交換器を説明する。なお、本実施形態では、第1実施形態と同一構成部分には同一符号を付し、その説明を省略することがある。この点は、後述する第3実施形態でも同様である。
次に、図11を参照して、本発明の第2実施形態に係るフィンチューブ型熱交換器を説明する。本実施形態では、図11に示す形状の伝熱フィン3Cが用いられる。この伝熱フィン3Cは、第1実施形態で用いられた伝熱フィン3Aから張り出し部51の形状を変更しただけのものである。ベース部4からの壁部52の高さは、ベース部4からの張り出し部51の高さよりも高い。
Claims (27)
- ベース部と、
前記ベース部から立ち上がる筒状のカラー部と、
前記カラー部の先端の一部分が前記カラー部の先端から前記カラー部の径方向外向きに張り出した張り出し部と、
前記カラー部の先端であって前記張り出し部以外の領域に延長されて形成された壁部と、を具備し、
前記ベース部から前記壁部の高さは、前記ベース部から前記張り出し部の高さより高い、伝熱フィン。 - 前記張り出し部は、少なくとも2つ設けられている、請求項1に記載の伝熱フィン。
- 少なくとも2つの前記張り出し部の一方は一の方向に延びており、少なくとも2つの前記張り出し部の他方は前記一の方向と反対方向に延びている、請求項2に記載の伝熱フィン。
- 前記一の方向は、前記伝熱フィンの長手方向と直交する方向である、請求項3に記載の伝熱フィン。
- 前記一の方向は、前記カラー部の中心から前記伝熱フィンの長手方向と直交する幅方向に延びる直線に対して±30度の範囲内にある、請求項3に記載の伝熱フィン。
- 前記張り出し部は、前記カラー部の先端から遠ざかるにつれて径方向外向きに屈曲している構造である、請求項1に記載の伝熱フィン。
- 前記張り出し部と前記壁部との間に、切り欠き部が設けられている、請求項1に記載の伝熱フィン。
- 前記張り出し部は、前記カラー部を構成する筒状体の外周面から、前記張り出し部の中央部が盛り上がる形状をしている、請求項1に記載の伝熱フィン。
- 前記張り出し部は、前記カラー部を構成する筒状体の外周面に設けられた突起である、請求項1に記載の伝熱フィン。
- 前記カラー部の根元から湾曲して前記ベース部につながり、窪みを形成する段差部を設けた、請求項1に記載の伝熱フィン。
- ベース部と、
前記ベース部から立ち上がる筒状のカラー部と、
前記カラー部の先端の一部分が前記カラー部の先端から前記カラー部の径方向外向きに張り出した張り出し部と、
前記カラー部の先端であって前記張り出し部以外の領域に延長されて形成された壁部と、
前記カラー部の根元から湾曲して前記ベース部につながり、窪みを形成する段差部と、
を具備した伝熱フィン。 - 積み重ねられた複数枚の伝熱フィンと、
前記複数枚の伝熱フィンを貫通する伝熱管と、を備え、
前記伝熱フィンは、
ベース部と、
前記ベース部から立ち上がる筒状のカラー部と、
前記カラー部の先端の一部分が前記カラー部の先端から前記カラー部の径方向外向きに張り出した張り出し部と、
前記カラー部の先端であって前記張り出し部以外の領域に延長されて形成された壁部と、を具備し、
前記ベース部から前記壁部の高さは、前記ベース部から前記張り出し部の高さより高い、フィンチューブ型熱交換器。 - 前記張り出し部は、少なくとも2つ設けられている、請求項12記載のフィンチューブ型熱交換器。
- 少なくとも2つの前記張り出し部の一方は一の方向に延びており、少なくとも2つの前記張り出し部の他方は前記一の方向と反対方向に延びている、請求項13に記載のフィンチューブ型熱交換器。
- 前記一の方向は、前記伝熱フィンの長手方向と直交する方向である、請求項14に記載のフィンチューブ型熱交換器。
- 前記一の方向は、前記カラー部の中心から前記伝熱フィンの長手方向と直交する幅方向に延びる直線に対して±30度の範囲内にある、請求項14に記載のフィンチューブ型熱交換器。
- 前記張り出し部は、前記カラー部の先端から遠ざかるにつれて径方向外向きに屈曲している構造である、請求項12に記載のフィンチューブ型熱交換器。
- 前記張り出し部と前記壁部との間に、切り欠き部が設けられている、請求項12に記載のフィンチューブ型熱交換器。
- 前記張り出し部は、前記カラー部を構成する筒状体の外周面から、前記張り出し部の中央部が盛り上がる形状をしている、請求項12に記載のフィンチューブ型熱交換器。
- 前記張り出し部は、前記カラー部を構成する筒状体の外周面に設けられた突起である、請求項12に記載のフィンチューブ型熱交換器。
- 前記積み重ねられた伝熱フィンの中の一の伝熱フィンの壁部は、前記一の伝熱フィンに積み重ねられた他の伝熱フィンのカラー部の根元の裏面に当接している、請求項12に記載のフィンチューブ型熱交換器。
- 前記積み重ねられた伝熱フィンの中の一の伝熱フィンの壁部は、前記一の伝熱フィンに積み重ねられた他の伝熱フィンのカラー部の根元の裏面に当接していない、請求項12に記載のフィンチューブ型熱交換器。
- 前記カラー部の根元から湾曲して前記ベース部につながり、窪みを形成する段差部を設けた、請求項12に記載のフィンチューブ型熱交換器。
- 前記積み重ねられた伝熱フィンの中の一の伝熱フィンの前記張り出し部は、前記一の伝熱フィンに積み重ねられた他の伝熱フィンの前記段差部によって形成される窪み内に入り込む、請求項23に記載のフィンチューブ型熱交換器。
- 前記積み重ねられた伝熱フィンの中の一の伝熱フィンの前記張り出し部が、前記一の伝熱フィンに積み重ねられた他の伝熱フィンの前記段差部によって形成される窪みと接触している範囲で、前記ベース部から前記壁部の高さは、前記ベース部から前記張り出し部の高さより高い、請求項23に記載のフィンチューブ型熱交換器。
- 前記積み重ねられた伝熱フィンの中の一の伝熱フィンの前記壁部は、前記一の伝熱フィンに積み重ねられた他の伝熱フィンの前記カラー部の根元の内側に入り込む、請求項23に記載のフィンチューブ型熱交換器。
- 圧縮機と、
凝縮器と、
絞り装置と、
蒸発器と、
前記圧縮機、前記凝縮器、前記絞り装置及び前記蒸発器に、冷媒を循環させる冷媒回路と、を備え、
前記凝縮器と前記蒸発器との少なくとも一方が請求項12に記載のフィンチューブ型熱交換器である、ヒートポンプ装置。
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EP12848344.3A EP2778593B1 (en) | 2011-11-10 | 2012-11-09 | Fin-tube heat exchanger |
JP2013542859A JP6115783B2 (ja) | 2011-11-10 | 2012-11-09 | 伝熱フィン、フィンチューブ型熱交換器及びヒートポンプ装置 |
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JP2011246711 | 2011-11-10 | ||
JP2011-246711 | 2011-11-10 |
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EP (1) | EP2778593B1 (ja) |
JP (1) | JP6115783B2 (ja) |
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JP2018066516A (ja) * | 2016-10-20 | 2018-04-26 | リンナイ株式会社 | フィンチューブ型熱交換器及びこの熱交換器を備える燃焼装置 |
WO2018139162A1 (ja) * | 2017-01-24 | 2018-08-02 | 三菱電機株式会社 | 熱交換器 |
US11125505B2 (en) | 2017-09-19 | 2021-09-21 | Samsung Electronics Co., Ltd. | Heat exchanger and air conditioner including the same |
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JP6115783B2 (ja) * | 2011-11-10 | 2017-04-19 | パナソニックIpマネジメント株式会社 | 伝熱フィン、フィンチューブ型熱交換器及びヒートポンプ装置 |
US20160079639A1 (en) * | 2014-09-15 | 2016-03-17 | James O. Pinon | Cooling fin for a battery cell |
CN107850403B (zh) * | 2015-07-10 | 2019-08-23 | 三菱电机株式会社 | 热交换器及空气调节装置 |
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US11125505B2 (en) | 2017-09-19 | 2021-09-21 | Samsung Electronics Co., Ltd. | Heat exchanger and air conditioner including the same |
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Publication number | Publication date |
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EP2778593A1 (en) | 2014-09-17 |
EP2778593B1 (en) | 2017-05-10 |
CN103105089B (zh) | 2017-03-01 |
JPWO2013069299A1 (ja) | 2015-04-02 |
EP2778593A4 (en) | 2014-10-15 |
CN202885630U (zh) | 2013-04-17 |
CN103105089A (zh) | 2013-05-15 |
JP6115783B2 (ja) | 2017-04-19 |
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