WO2013076990A1 - 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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- WO2013076990A1 WO2013076990A1 PCT/JP2012/007515 JP2012007515W WO2013076990A1 WO 2013076990 A1 WO2013076990 A1 WO 2013076990A1 JP 2012007515 W JP2012007515 W JP 2012007515W WO 2013076990 A1 WO2013076990 A1 WO 2013076990A1
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- heat transfer
- collar portion
- collar
- receding
- base
- Prior art date
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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
-
- 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
- F28F1/30—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 being attachable to the element
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.
- Patent Document 1 discloses a finned tube heat exchanger 100 as shown in FIG.
- the heat exchanger 100 includes a plurality of stacked heat transfer fins 120 and a heat transfer tube 110 that passes through the heat transfer fins 120.
- Each heat transfer fin 120 includes a cylindrical collar portion 123 (having a constant cross-sectional shape) that rises 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.
- One flare portion 124 of adjacent heat transfer fins 120 abuts on the vicinity of the root portion 122 of the other base portion 121, so that the fin pitch (alignment interval of the base portions 121) is defined by the collar portion 123.
- 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 expanded.
- the collar portion 123 is brought into close contact.
- the base portion 121 in order to prevent deformation of the heat transfer fin 120 caused by contraction of the heat transfer tube 110 during tube expansion, the base portion 121 has a root portion 122 in the base portion 121.
- a stepped portion 125 is provided for sinking a portion surrounding the.
- Patent Document 2 proposes that the heat transfer from the heat transfer tube 110 to the heat transfer fin 120 is improved by filling the gap 130 with a filler such as silicone resin.
- the dissimilar material which is usually a filler
- the heat transfer fins 120 and the heat transfer tubes 110 made of metal as waste materials when the heat exchanger 100 is discarded increases. It becomes difficult. Thereby, recyclability deteriorates and environmental load will increase.
- the present invention solves such a conventional problem, and a fin tube type heat exchanger capable of increasing the contact area between the heat transfer tube and the collar portion of the heat transfer fin without deteriorating the recyclability, and this
- An object of the present invention is to provide a heat pump device using a finned tube heat exchanger.
- an object of this invention is to provide the heat-transfer fin suitable for a fin tube type heat exchanger.
- a heat transfer fin suitable for a fin tube type heat exchanger can be provided.
- the block diagram of the fin tube type heat exchanger which concerns on one Embodiment of this invention Cross-sectional perspective view of the finned tube heat exchanger shown in FIG. Partial sectional view of the finned tube heat exchanger shown in FIG. Partial sectional view of one heat transfer fin
- Partial sectional view of a modified finned tube heat exchanger The block diagram of the room air conditioner which is an example of the heat pump apparatus in which the finned tube type heat exchanger shown in FIG. 1 is used Partial sectional view of a conventional finned tube heat exchanger
- the first aspect of the present disclosure is: A base portion having a flat surface; A cylindrical collar portion rising from the base portion; A flare portion that extends from the tip of the collar portion outward in the radial direction of the collar portion, With the flat surface of the base portion as a reference surface, the base of the collar portion reaches a position that does not exceed the reference surface, and the inclined surface is bent at an acute angle from the base of the collar portion toward the tip side of the collar portion.
- a receding portion having A heat transfer fin provided with
- the flare portion of one heat transfer fin is an inclined surface provided at the receding portion of another heat transfer fin stacked on the one heat transfer fin. Surface contact. Therefore, the contact area between one heat transfer fin and another heat transfer fin is increased, and heat transfer from the collar portion of the one heat transfer fin to the other heat transfer fin can be improved.
- the flare portion is provided over the entire circumference from the tip of the collar portion outward in the radial direction of the collar portion. Therefore, the contact area between the collar portion of one heat transfer fin and the collar portion of another heat transfer fin can be increased over the entire circumference of the collar portion.
- the base of the collar portion does not protrude beyond the reference surface when the flat surface of the base portion is used as the reference surface. That is, the receding part does not protrude beyond the flat surface of the base part. Therefore, when the heat transfer fin is placed flat on another object, the flat surface of the base portion comes into contact with the other object. As a result, it is possible to prevent the retracted portion from colliding with another object and deforming.
- an inclination angle of the flare part with respect to an axial direction of the collar part is the same as an inclination angle of the receding part with respect to an axial direction of the collar part or the collar part
- the heat transfer fin is smaller than the inclination angle of the receding portion with respect to the axial direction.
- the third aspect of the present disclosure provides a heat transfer fin in which the flare portion and the inclined surface of the receding portion are parallel to the first or second aspect. According to such a configuration, since the inclination angle of the flare portion with respect to the axial direction of the collar portion is the same as the inclination angle of the receding portion with respect to the axial direction of the collar portion, when a plurality of heat transfer fins are stacked, one The flare part of the heat transfer fin is in surface contact with the receding part of another heat transfer fin stacked on the one heat transfer fin. Therefore, the contact area between one heat transfer fin and another heat transfer fin is increased, and heat transfer from the collar portion of the one heat transfer fin to the other heat transfer fin can be improved.
- the step further includes a stepped portion for lifting the retracted portion from the base portion, and the stepped portion in the axial direction of the collar portion.
- the height C provides a heat transfer fin that is larger than the receding distance D of the receding portion in the axial direction of the collar portion.
- the receding portion does not protrude beyond the flat surface of the base portion. Therefore, when the heat transfer fin is placed flat on another object, the flat surface of the base portion comes into contact with the other object. As a result, it is possible to prevent the retracted portion from colliding with another object and deforming. Thereby, it can prevent that the shape of a heat-transfer fin varies and can improve the quality of a heat-transfer fin.
- the fifth aspect of the present disclosure is: 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 portion having a flat surface; A cylindrical collar portion rising from the base portion; A flare portion that extends from the tip of the collar portion outward in the radial direction of the collar portion, With the flat surface of the base portion as a reference surface, the base of the collar portion reaches a position that does not exceed the reference surface, and the inclined surface is bent at an acute angle from the base of the collar portion toward the tip side of the collar portion.
- a receding portion having A finned tube heat exchanger is provided.
- the flare portion of one heat transfer fin is an inclination provided in the receding portion of the other heat transfer fin stacked on the one heat transfer fin. Make surface contact with the surface. Therefore, the contact area between one heat transfer fin and another heat transfer fin is increased, and heat transfer from the collar portion of the one heat transfer fin to the other heat transfer fin can be improved.
- the flare portion is provided over the entire circumference from the tip of the collar portion outward in the radial direction of the collar portion. Therefore, the contact area between the collar portion of one heat transfer fin and the collar portion of another heat transfer fin can be increased over the entire circumference of the collar portion.
- the base of the collar portion does not protrude beyond the reference surface when the flat surface of the base portion is used as the reference surface. That is, the receding part does not protrude beyond the flat surface of the base part. Therefore, when the heat transfer fin is placed flat on another object, the flat surface of the base portion comes into contact with the other object. As a result, it is possible to prevent the retracted portion from colliding with another object and deforming.
- the receding portion of one heat transfer fin in the stacked heat transfer fins may have another transfer structure stacked on the one heat transfer fin.
- a finned tube heat exchanger that enters a space formed by the flare portion of a heat fin and contacts the flare.
- the receding portion of one heat transfer fin is a space formed by the flare portions of other heat transfer fins stacked on the one heat transfer fin. It enters and comes into surface contact with the flare. Thereby, the contact area of one heat-transfer fin and another heat-transfer fin can be increased, and the heat-transfer property from the collar part of one heat-transfer fin to another heat-transfer fin can be improved.
- an inclination angle of the flare portion with respect to the axial direction of the collar portion is the same as an inclination angle of the receding portion with respect to the axial direction of the collar portion or Provided is a finned tube heat exchanger having an inclination angle of the receding portion with respect to the axial direction of the collar portion.
- the eighth aspect of the present disclosure provides the finned tube heat exchanger in addition to any one of the fifth to seventh aspects, wherein the flare portion and the inclined surface of the receding portion are parallel to each other. According to such a configuration, since the inclination angle of the flare portion with respect to the axial direction of the collar portion is the same as the inclination angle of the receding portion with respect to the axial direction of the collar portion, when a plurality of heat transfer fins are stacked, one The flare part of the heat transfer fin is in surface contact with the receding part of another heat transfer fin stacked on the one heat transfer fin. Therefore, the contact area between the collar portion of one heat transfer fin and the collar portion of another heat transfer fin increases, and the heat transfer performance from the collar portion of one heat transfer fin to the other heat transfer fins can be improved. it can.
- the ninth aspect of the present disclosure further includes a stepped portion that lifts the retracted portion from the base portion, and a height of the stepped portion in the axial direction of the collar portion.
- the length C provides a finned tube heat exchanger that is larger than the receding distance D of the receding portion in the axial direction of the collar portion.
- the receding portion does not protrude beyond the flat surface of the base portion. Therefore, when the heat transfer fin is placed flat on another object, the flat surface of the base portion comes into contact with the other object. As a result, it is possible to prevent the retracted portion from colliding with another object and deforming. Thereby, it can prevent that the shape of a heat-transfer fin varies and can improve the quality of a heat-transfer fin.
- a tenth 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; And at least one of the condenser and the evaporator is a finned tube heat exchanger according to any one of the fifth to ninth aspects.
- FIG. 1 to 3 show a finned tube heat exchanger 1 according to an embodiment of the present invention.
- This heat exchanger 1 penetrates a plurality of stacked heat transfer fins 3, a pair of side plates 20 disposed on both sides of the heat transfer fins 3, and the heat transfer fins 3 and the side plates 20 in a skewered manner.
- a plurality of U-shaped heat transfer tubes 2 are provided.
- the heat transfer fins 3 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 3 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.
- the heat transfer tube 2 is cylindrical.
- the heat transfer tube 2 for example, an internally grooved copper tube can be used.
- Each heat transfer fin 3 is, for example, a plate shape formed by pressing a thin aluminum plate. Specifically, each heat transfer fin 3 includes a base portion 4 that extends around the heat transfer tube 2 and a cylindrical collar portion 5 that rises from the base portion 4 along the heat transfer tube 2. In the following, for convenience of explanation, the direction in which the collar portion 5 rises is referred to as upward, and the opposite direction is referred to as downward.
- the heat transfer fins 3 are stacked with the central axis of the collar portion 5 aligned, and the heat transfer tube 2 having an outer diameter smaller than the inner diameter of the collar portion 5 is inserted inside the collar portion 5. Thereafter, the heat transfer tube 2 is expanded to bring the outer peripheral surface of the heat transfer tube 2 into close contact with the inner peripheral surface of the collar portion 5.
- heat exchange can be performed between the fluid flowing in the heat transfer tube 2 (for example, R410A refrigerant) and the fluid flowing between the base portions 4 of the heat transfer fins 3 (for example, air).
- the heat transfer path is indicated by a broken line arrow.
- the heat of the fluid flowing in the heat transfer tube 110 is conducted to the outer peripheral surface of the heat transfer tube 110 and is transmitted from the outer peripheral surface of the heat transfer tube 110 to the inner peripheral surface of the collar portion 123.
- the heat of the fluid flowing in the heat transfer tube 110 is conducted to the outer peripheral surface of the heat transfer tube 110 and is transmitted from the outer peripheral surface of the heat transfer tube 110 to the inner peripheral surface of the collar portion 123.
- it is transmitted to the fluid flowing between the base parts 121 from the outer peripheral surface of the collar part 123 and the upper and lower surfaces of the base part 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 123 is generally defined by the following Equation 1.
- 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 and the environmental load increases, such as a decrease in the recycling rate and an increase in energy required for recycling.
- methods for increasing the contact thermal conductance K include a method of reducing the surface roughness ⁇ 1 and ⁇ 2 of the contact surface, a method of improving the contact pressure P, the heat transfer tube 110 and the heat transfer fin 120.
- a method of improving the heat transfer coefficients ⁇ 1 and ⁇ 2 and a method of reducing the softer hardness H of the heat transfer tubes 110 or the heat transfer fins 120 are a method of increasing the contact area S.
- the contact thermal resistance Rc can be reduced by increasing the contact area S between the heat transfer tube 110 and the collar portion 123 even if the contact thermal conductance K does not change. If the contact heat resistance Rc can be reduced, the heat transfer from the heat transfer tubes 110 to the heat transfer fins 120 can be improved, and the heat exchange efficiency as a heat exchanger can be improved.
- a flare portion 6 is provided above the collar portion 5 and expands radially outward from the tip of the collar portion 5, but below the collar portion 5.
- a receding portion 7 is provided around the collar portion 5 so as to recede toward the base of the collar portion 5 so as to form a recess with the collar portion 5.
- the base portion 4 has a flat surface 4a.
- the flat surface 4a is a surface provided on the lower surface of the base portion 4 (the surface opposite to the direction in which the collar portion 5 rises). The base of the collar portion 5 reaches a position that does not exceed the reference surface with the flat surface 4a of the base portion 4 as a reference surface.
- the base of the collar portion 5 is located above the reference plane.
- the base of the collar portion 5 is located above the reference plane by a distance that is 25% or more of the thickness of the base portion 4.
- the receding portion 7 has an inclined surface that is bent at an acute angle from the base of the collar portion 5 toward the tip side of the collar portion 5.
- the flare portion 6 extends from the tip of the collar portion 5 outward in the radial direction of the collar portion 5 over the entire circumference.
- the receding portion 7 of one heat transfer fin 3 enters the space formed by the flare portion 6 of the other heat transfer fin 3 and is in contact with the flare portion 6.
- the collar portion 5 defines the fin pitch (the arrangement interval of the base portions 4) when the retreat portion 7 contacts the flare portion 6.
- the flare portion 6 of one heat transfer fin 3 is a retreating portion of another heat transfer fin 3 stacked on the one heat transfer fin 3. 7 is brought into surface contact with the inclined surface provided in 7. Further, when a plurality of heat transfer fins 3 are stacked, the receding portion 7 of one heat transfer fin 3 is a space formed by the flare portions 6 of other heat transfer fins 3 stacked on the one heat transfer fin 3. It enters and comes into surface contact with the flare portion 6. Therefore, the contact area between the one heat transfer fin 3 and the other heat transfer fin 3 is increased, and the heat transfer property from the collar portion 5 of the one heat transfer fin 3 to the other heat transfer fin 3 can be improved. .
- the heat transfer fin 3 of the one heat transfer fin 3 is provided over the entire circumference of the collar portion 5.
- the contact area between the collar portion 5 and the collar portion 5 of another heat transfer fin 3 can be increased.
- the base of the collar portion 5 does not protrude beyond the reference surface when the flat surface 4a of the base portion 4 is used as the reference surface. That is, the receding portion 7 does not protrude beyond the flat surface 4 a of the base portion 4. Therefore, when the heat transfer fin 3 is placed flat on another object, the flat surface 4a of the base part 4 comes into contact with the other object, so that the retreating part 7 collides with the other object and deforms. Can be prevented.
- the base unit 4 may be flat as in the present embodiment, or may have a waveform having a plurality of peaks and valleys. When making the base part 4 into a waveform, it is preferable to provide a flat ring part around the receding part 7.
- the flare portion 6 and the inclined surface of the receding portion 7 are parallel, and the outer surface 7a of the receding portion 7 is in surface contact with the inner surface 6a of the flare portion 6.
- the inclination angle ⁇ of the flare portion 6 with respect to the axial direction of the collar portion 5 is The heat transfer fins 3 having the same inclination angle ⁇ may be stacked.
- the inclination angle ⁇ of the flare portion 6 with respect to the axial direction of the collar portion 5 is smaller than the inclination angle ⁇ of the receding portion 7 with respect to the axial direction of the collar portion 5.
- the flare part 6 is expanded by the retreat part 7, and finally they are parallel to each other and come into surface contact.
- the flare portion 6 of one heat transfer fin 3 is a retreating portion of another heat transfer fin 3 stacked on the one heat transfer fin 3. 7, the contact area between one heat transfer fin 3 and the other heat transfer fin 3 is increased, and the heat transfer performance from the collar portion 5 of the one heat transfer fin 3 to the other heat transfer fin 3 is increased. Can be improved.
- the base of one collar part 5 of the adjacent heat transfer fins 3 and the other A gap 9 formed between the front end of the collar portion 5 can be reduced (first action).
- the contact area between the heat transfer tube and the collar portion can be increased by reducing the area where the heat transfer tube 2 and the collar portion 5 do not contact each other.
- the gap 9 is increased to some extent.
- the receding portion 7 since the receding portion 7 is in contact with the flare portion 6 in the space surrounded by the flare portion 6, the gap 9 between the collar portions 5 can be made as small as possible.
- the contact area of the collar portion 5 can be made larger than that of the virtual heat exchanger (second action).
- the heat transfer efficiency from the heat transfer tubes 2 to the heat transfer fins 3 can be improved by reducing the contact heat resistance, so that the heat exchange efficiency of the heat exchanger 1 can be improved. Further, as a configuration for obtaining this effect, no material other than the heat transfer tubes 2 and the heat transfer fins 3 is required, so that the heat exchanger 1 can be easily separated at the time of disposal and the recyclability is not deteriorated.
- the flare part 6 and the receding part 7 are parallel, and the outer side surface 7 a of the receding part 7 is in surface contact with the inner side surface 6 a of the flare part 6.
- the tip of the flare part 124 is in line contact with the base part 121. Since the amount of heat transferred through the line contact portion is extremely small, in the conventional heat exchanger 100, the heat is transferred from the heat transfer tube 110 to the collar portion 123 as indicated by the broken arrow B in FIG. Heat is conducted only to the base portion 121 of the heat transfer fin 120 that is the same as the collar portion 123. That is, the heat conduction path from the collar part 123 to the base part 121 is only one path via the root part 122.
- the heat transferred to the part 5 is conducted not only to the base part 4 of the heat transfer fin that is the same as the collar part 5 but also to the base part 4 of the adjacent heat transfer fin 3. That is, as the heat conduction path from the collar part 5 to the base part 4, two paths are secured: a path passing through the receding part 7 and a path passing from the flare part 6 to the receding part 7 of the adjacent heat transfer fin 3. The Thereby, heat can be transmitted to the base part 4 more efficiently than the conventional heat exchanger 100. Therefore, the heat transfer from the heat transfer tubes 2 to the heat transfer fins 3 is further improved, and the heat exchange efficiency can be further improved.
- a stepped portion 8 is provided between the retracted portion 7 and the base portion 4 to lift the retracted portion 7 with respect to the lower surface of the base portion 4. That is, the height C of the step portion 8 in the axial direction of the collar portion 5 is larger than the receding distance D of the receding portion 7 in the axial direction of the collar portion 5.
- the height C of the stepped portion 8 in the axial direction of the collar portion 5 is the height from the flat surface 4a of the base portion 4 to the upper surface of the stepped portion 8 (upper surface of a flat portion 81 described later).
- the receding distance D of the receding portion 7 is a distance from the upper surface of the step portion 8 (upper surface of the flat portion 81) to the lower surface of the receding portion 7 in the axial direction of the collar portion 5. According to such a configuration, the receding portion 7 does not protrude beyond the flat surface 4 a of the base portion 4. Therefore, when the heat transfer fin 3 is placed flat on another object, the flat surface of the base portion 4. 4a comes into contact with another object. As a result, the retreating portion 7 can be prevented from colliding with another object and deforming. Thereby, it can prevent that the shape of the heat-transfer fin 3 varies and the quality of the heat-transfer fin 3 can be improved.
- the step portion 8 rises from the base portion 4 so as to surround the receding portion 7, and the ring is connected to the upper end portion of the receding portion 7 radially inward from the upper end portion of the wall portion 82. And a flat surface portion 81.
- the plane portion 81 can be omitted.
- the retracted portion 7 protrudes from the lower surface of the base portion 4, and thus the retracted portion 7 may collide with another object and deform when the heat transfer fin 3 is manufactured, for example. is there.
- the stepped portion 8 is provided as in the present embodiment, the retracted portion 7 does not protrude from the lower surface (flat surface 4a) of the base portion 4, so the retracted portion 7 collides with another object. Deformation can be prevented. Thereby, since the dispersion
- 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 flare portion 6 and the receding portion 7 do not necessarily need to be tapered as long as the receding portion 7 and the flare portion 6 are in contact with each other within the space surrounded by the flare portion 6.
- the receding portion 7 may reced toward the base of the collar portion 5 while curving instead of being linear.
- the flare part 6 may expand radially outward while curving.
- the finned tube heat exchanger of the present invention can be suitably used for heat pump devices such as room air conditioners, water heaters, and heaters.
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Abstract
Description
平坦面を有するベース部と、
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から前記カラー部の径方向外向きに全周に亘って広がるフレア部と、
前記ベース部の前記平坦面を基準面として前記カラー部の根元は前記基準面を超えない位置まで達しており、前記カラー部の根元から前記カラー部の先端側に向けて鋭角に折れ曲がった傾斜面を有する後退部と、
を備えた伝熱フィンを提供する。
平坦面を有するベース部と、
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から前記カラー部の径方向外向きに全周に亘って広がるフレア部と、
前記ベース部の前記平坦面を基準面として前記カラー部の根元は前記基準面を超えない位置まで達しており、前記カラー部の根元から前記カラー部の先端側に向けて鋭角に折れ曲がった傾斜面を有する後退部と、
を備え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、
平坦面を有するベース部と、
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から前記カラー部の径方向外向きに全周に亘って広がるフレア部と、
前記ベース部の前記平坦面を基準面として前記カラー部の根元は前記基準面を超えない位置まで達しており、前記カラー部の根元から前記カラー部の先端側に向けて鋭角に折れ曲がった傾斜面を有する後退部と、
を具備したフィンチューブ型熱交換器を提供する。
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。
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)
フレア部6及び後退部7は、後退部7とフレア部6とがフレア部6が囲う空間内で接触する限り、必ずしもテーパー状である必要はない。例えば、図6に示すように、後退部7が直線状ではなく湾曲しながらカラー部5の根元に向かって後退していてもよい。あるいは、図示は省略するが、フレア部6が湾曲しながら径方向外向きに拡大していてもよい。
Claims (10)
- 平坦面を有するベース部と、
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から前記カラー部の径方向外向きに全周に亘って広がるフレア部と、
前記ベース部の前記平坦面を基準面として前記カラー部の根元は前記基準面を超えない位置まで達しており、前記カラー部の根元から前記カラー部の先端側に向けて鋭角に折れ曲がった傾斜面を有する後退部と、
を備えた伝熱フィン。 - 前記カラー部の軸方向に対する前記フレア部の傾斜角度は、前記カラー部の軸方向に対する前記後退部の傾斜角度と同一又は前記カラー部の軸方向に対する前記後退部の傾斜角度より小さい、請求項1に記載の伝熱フィン。
- 前記フレア部と前記後退部の傾斜面とは平行である、請求項1に記載の伝熱フィン。
- 前記ベース部から前記後退部を持ち上げる段差部をさらに備え、
前記カラー部の軸方向における前記段差部の高さCは、前記カラー部の軸方向における前記後退部の後退距離Dより大きい、請求項1に記載の伝熱フィン。 - 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、
平坦面を有するベース部と、
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から前記カラー部の径方向外向きに全周に亘って広がるフレア部と、
前記ベース部の前記平坦面を基準面として前記カラー部の根元は前記基準面を超えない位置まで達しており、前記カラー部の根元から前記カラー部の先端側に向けて鋭角に折れ曲がった傾斜面を有する後退部と、
を具備した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後退部は、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フレア部によって形成された空間に入り込み前記フレアと接触する、請求項5に記載のフィンチューブ型熱交換器。
- 前記カラー部の軸方向に対する前記フレア部の傾斜角度は、前記カラー部の軸方向に対する前記後退部の傾斜角度と同一又は前記カラー部の軸方向に対する前記後退部の傾斜角度より小さい、請求項5に記載のフィンチューブ型熱交換器。
- 前記フレア部と前記後退部の傾斜面とは平行である、請求項5に記載のフィンチューブ型熱交換器。
- 前記ベース部から前記後退部を持ち上げる段差部をさらに備え、
前記カラー部の軸方向における前記段差部の高さCは、前記カラー部の軸方向における前記後退部の後退距離Dより大きい、請求項5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5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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JP2013545799A JP6074723B2 (ja) | 2011-11-25 | 2012-11-22 | 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 |
EP12851069.0A EP2784427B1 (en) | 2011-11-25 | 2012-11-22 | Heat transfer fin, fin-tube heat exchanger, and heat pump device |
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JP2011257245 | 2011-11-25 |
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EP (1) | EP2784427B1 (ja) |
JP (1) | JP6074723B2 (ja) |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2975350A1 (de) * | 2014-06-25 | 2016-01-20 | Gea Maschinenkühltechnik Gmbh | Wärmetauscher |
AU2014405791B2 (en) * | 2014-09-08 | 2018-11-01 | Mitsubishi Electric Corporation | Heat exchanger and method for manufacturing plate-shaped fins for heat exchanger |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN203069029U (zh) * | 2011-11-25 | 2013-07-17 | 松下电器产业株式会社 | 传热翅片、翅片管型热交换器及热泵装置 |
JP6575895B2 (ja) * | 2015-01-28 | 2019-09-18 | パナソニックIpマネジメント株式会社 | 熱交換器 |
US11493284B2 (en) * | 2017-09-30 | 2022-11-08 | Sanhua (Hangzhou) Micro Channel Heat Exchanger Co., Ltd. | Heat exchanger and fin |
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- 2012-11-22 CN CN 201220623198 patent/CN203069029U/zh not_active Expired - Fee Related
- 2012-11-22 CN CN201210480103.3A patent/CN103134371B/zh active Active
- 2012-11-22 JP JP2013545799A patent/JP6074723B2/ja active Active
- 2012-11-22 WO PCT/JP2012/007515 patent/WO2013076990A1/ja active Application Filing
- 2012-11-22 EP EP12851069.0A patent/EP2784427B1/en active Active
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AU2014405791B2 (en) * | 2014-09-08 | 2018-11-01 | Mitsubishi Electric Corporation | Heat exchanger and method for manufacturing plate-shaped fins for heat exchanger |
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CN103134371A (zh) | 2013-06-05 |
EP2784427B1 (en) | 2017-04-05 |
EP2784427A1 (en) | 2014-10-01 |
JP6074723B2 (ja) | 2017-02-08 |
CN203069029U (zh) | 2013-07-17 |
CN103134371B (zh) | 2016-03-30 |
JPWO2013076990A1 (ja) | 2015-04-27 |
EP2784427A4 (en) | 2014-10-15 |
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