WO2022264752A1 - 熱交換器及び空気調和機 - Google Patents
熱交換器及び空気調和機 Download PDFInfo
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- WO2022264752A1 WO2022264752A1 PCT/JP2022/021053 JP2022021053W WO2022264752A1 WO 2022264752 A1 WO2022264752 A1 WO 2022264752A1 JP 2022021053 W JP2022021053 W JP 2022021053W WO 2022264752 A1 WO2022264752 A1 WO 2022264752A1
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- cut
- downstream
- raised
- heat exchanger
- raised slit
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 60
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 102220295311 rs1048000119 Human genes 0.000 description 1
- 102220038178 rs1559014 Human genes 0.000 description 1
- 102220014332 rs397517039 Human genes 0.000 description 1
- 102220076037 rs796052349 Human genes 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
- F28F1/325—Fins with openings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
- F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
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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
- F28F2215/00—Fins
- F28F2215/08—Fins with openings, e.g. louvers
Definitions
- the present disclosure relates to heat exchangers used in air conditioners and the like.
- FIG. 5 is a diagram showing the configuration of the heat exchanger 1 according to Patent Document 1.
- a collar portion 3 and a heat transfer device are provided adjacent to each other in a direction orthogonal to the direction of air flow through the heat exchanger 1 .
- a cut-and-raised piece portion 5a is provided on the center line connecting the center points of the heat pipes 4 to each other.
- cut-and-raised piece portions 5b in the intermediate row and cut-and-raised piece portions 5c close to the fin edge are provided.
- the cut-and-raised piece portion 5a on the center line, the cut-and-raised piece portion 5b in the intermediate row, and the cut-and-raised piece portion 5c near the edge of the fin are cut and raised, respectively. It is also called a raising piece 5c.
- the cut-and-raised piece portions 5a, 5b, and 5c are cut-and-raised slit end portions 5d on the center line, cut-and-raised slit-end portions 5e in the middle row, and cut-and-raised slit-end portions 5f close to the fin edges, respectively. It is connected to two flat surfaces.
- the cut-and-raised slit end 5d on the center line, the cut-and-raised slit end 5e in the intermediate row, and the cut-and-raised slit end 5f near the fin edge are referred to as the end 5d, the end 5e, and the end 5f, respectively.
- the angle of the end portion 5d and the end portion The angle X1 of 5e and the angle X2 of the end portion 5f are made larger.
- the heat exchanger 1 facilitates guiding the heat exchange air to the downstream side of the heat transfer tubes 4 by means of the ends 5f of the cut-and-raised pieces 5c near the fin edges.
- the present disclosure reduces pressure loss, guides the circulating heat exchange air to the downstream side of the heat transfer tube, reduces the dead water area downstream of the heat transfer tube, improves heat exchange efficiency, and makes the wind speed distribution substantially uniform.
- a heat exchanger and an air conditioner capable of suppressing noise are provided.
- a heat exchanger includes fins and heat transfer tubes passing through the fins.
- the fins have at least two cut-and-raised slits substantially orthogonal to the edges of the fins between the heat transfer tubes in the stage direction.
- the upstream cut-and-raised slit end angle A1 and the downstream cut-and-raised slit end angle A2 are set to A1 ⁇ A2.
- the upstream cut-and-raised slit end angle A1 is the angle between the upstream slit end of the upstream cut-and-raised slit that is the most upstream of the cut-and-raised slits when viewed from the airflow direction and the orthogonal straight line perpendicular to the edge of the fin. It is the angle of the angle to form.
- the downstream cut-and-raised slit end angle A2 is defined by the angle between the downstream-side cut-and-raised slit end of the downstream cut-and-raised slit that is the most downstream cut-and-raised slit viewed from the airflow direction and the orthogonal straight line orthogonal to the edge of the fin. It is the angle of the angle to form.
- the air conditioner according to the present disclosure includes the heat exchanger according to the present disclosure, the cross-flow fan is disposed downstream of the fins in the airflow direction, and the downstream end of the fins and the outer peripheral side of the blades of the cross-flow fan The distance from the edge shall be 12 mm or less.
- the heat exchanger and air conditioner according to the present disclosure guide the circulating heat exchange air to the downstream side of the heat transfer tubes while reducing pressure loss, and reduce the dead water area downstream of the heat transfer tubes to improve the heat exchange efficiency. , the wind speed distribution can be substantially uniformed to suppress noise.
- FIG. 1 is a diagram showing an indoor unit of an air conditioner according to Embodiment 1.
- FIG. FIG. 2 is a diagram showing a configuration of part of the heat exchanger according to Embodiment 1.
- FIG. 3A is a diagram showing a wind speed distribution of heat exchange air flowing through the heat exchanger according to Embodiment 1.
- FIG. 3B is a diagram showing the wind speed distribution of heat exchange air flowing through the heat exchanger according to Comparative Example 1.
- FIG. 4A is a diagram showing a wind speed distribution of heat exchange air flowing through the heat exchanger according to Embodiment 1.
- FIG. 4B is a diagram showing a wind speed distribution of heat exchange air flowing through a heat exchanger according to Comparative Example 2.
- FIG. FIG. 5 is a diagram showing the configuration of a heat exchanger according to Patent Document 1. As shown in FIG.
- the angle of the end portion 5f of the cut-and-raised piece portion 5c near the fin edge on the upstream side and the cut-and-raised portion near the fin edge on the downstream side An end portion 5f of the dowel piece portion 5c is provided symmetrically.
- the angle of the end portion 5f of the cut-and-raised piece portion 5c near the fin edge on the upstream side becomes large, so that the air flowing through the end portion 5f collides with the end portion 5f, resulting in an increase in ventilation resistance.
- part of the airflow flowing upstream of the heat transfer tube 4 is guided by the end portion 5f to the cut and raised piece portions 5a, 5b, 5c, so that the amount of heat exchanged in the heat transfer tube 4 is reduced. Furthermore, the flow velocity difference between the flow velocity of the heat exchange air flowing through the cut and raised pieces 5a, 5b, and 5c and the flow velocity of the heat exchange air downstream of the heat transfer tube 4 increases, There was a risk of noise due to the deterioration of the wind speed distribution of the inflowing air in the cross-flow fan.
- the present disclosure provides the following heat exchangers. That is, the heat exchanger according to the present disclosure suppresses the collision of the heat exchange air at the upstream cut-and-raised slit end, and guides the heat-exchange air to the downstream side of the heat transfer tube by the downstream cut-and-raise slit end. Reduce pressure loss.
- the heat exchanger in the present disclosure guides the circulating heat exchange air to the downstream side of the heat transfer tubes, reduces the dead water area in the downstream part of the heat transfer tubes, improves the heat exchange efficiency, and substantially uniforms the wind speed distribution to reduce noise.
- the present disclosure provides an air conditioner that suppresses noise generated by a cross-flow fan.
- FIG. 1 is a cross-sectional view showing an indoor unit of an air conditioner 100 according to Embodiment 1.
- FIG. FIG. 2 is a diagram showing a configuration of part of heat exchanger 107 according to the first embodiment. The configuration of the air conditioner 100 according to Embodiment 1 will be described below with reference to FIGS.
- the indoor unit of the air conditioner 100 includes a suction port 101, a body casing 103 having an air outlet 102, a stabilizer 104, a rear guider 105, a cross-flow fan 106, and a heat exchanger 107. , is equipped with
- the heat exchanger 107 has a plurality of fins 108 shown in FIG. 2, and the plurality of fins 108 are provided in two rows in the airflow direction.
- the fins 108 have three cut-and-raised slits 111 which are penetrated by the heat transfer tubes 109 and substantially orthogonal to the edges of the fins 108 between the heat transfer tubes 109 in the step direction.
- the cut-and-raised slits 111 are three, the upstream cut-and-raised slit 111a, the central cut-and-raised slit 111b, and the downstream cut-and-raised slit 111c. Just do it.
- substantially perpendicular in the present disclosure means that although it is intended to be perpendicular, it also includes slightly deviated from perpendicular, and within the allowable error range for manufacturing the fins in the present disclosure , including orthogonal cases.
- other expressions using "substantially” such as substantially uniform and substantially equivalent are used, but these also mean completely uniform and completely equivalent. It means that there is an error that can be regarded as uniform as a whole and equivalent as a whole.
- the upstream cut-and-raised slit end angle A1 and the downstream cut-and-raised slit end angle A2 have the following relationship.
- the upstream cut-and-raised slit end portion angle A1 is the upstream cut-and-raised slit end portion 111d of the most upstream cut-and-raised slit 111a among the cut-and-raised slits 111 viewed from the airflow direction and the edge of the fin 108.
- the downstream side cut-and-raised slit end angle A2 is defined by the downstream side cut-and-raised slit end portion 111f of the most downstream cut-and-raised slit 111c viewed from the airflow direction and an orthogonal straight line orthogonal to the edge of the fin 108. is the angle of the corner.
- A2 is greater than or equal to 35° and A1 ⁇ A2.
- the distance H1 between the center line 110 connecting the center of the heat transfer tube 109 and the upstream edge of the upstream cut-and-raised slit 111a, and the distance H1 between the center line 110 connecting the center of the heat transfer tube 109 and the downstream cut-and-raise slit is H1>H2.
- Each distance from the heat transfer tube 109 to the upstream cut-and-raised slit end 111d, the center-side cut-and-raised slit end 111e, and the downstream cut-and-raised slit end 111f is preferably 1/2 or more of the tube diameter D.
- the heat exchanger 107 has two rows of fins 108 in the airflow direction, but the heat exchanger in the present disclosure is not limited to having two rows of fins, and may have one row or three or more rows of fins. I don't mind.
- the cross-flow fan 106 is arranged on the downstream side of the fins 108 when viewed from the airflow direction.
- the distance between heat exchanger 107 (downstream end 108a of fin 108) and blade outer peripheral end 106a of cross flow fan 106 is 12 mm or less, and air conditioner 100 according to Embodiment 1 has a distance of 10 mm.
- the heat exchanger 207 has the same configuration as the heat exchanger 107 according to Embodiment 1 except for the upstream cut-and-raised slit end angle A11 and the downstream cut-and-raised slit end angle A21. That is, the heat exchanger 207 has a plurality of fins 208 in two rows in the airflow direction. It has three cut-and-raise slits.
- the three cut-and-raise slits include an upstream cut-and-raise slit 211a and a downstream cut-and-raise slit 211c.
- the upstream cut-and-raised slit end angle A11 is the angle between the upstream-side cut-and-raised slit end 211d of the upstream side cut-and-raised slit 211a and an orthogonal straight line perpendicular to the edge of the fin 208 .
- the downstream side cut-and-raised slit end angle A21 is the angle formed by the downstream side cut-and-raised slit end 211f of the downstream side cut-and-raised slit 211c and an orthogonal straight line perpendicular to the edge of the fin 208 .
- the heat exchanger 107 has the downstream side cut-and-raised slit end angle A2 of 45°, so that the heat exchanger 207 according to Comparative Example 1 has the following effects.
- the heat exchanger 107 guides the heat exchange air to the downstream side of the heat transfer tube 109 by the downstream cut-and-raised slit end portion 111f, and reduces the dead water area in the downstream portion of the heat transfer tube 109, thereby improving the heat exchange efficiency. can do.
- the heat exchanger 107 suppresses excessive air guidance to the cut-and-raised slit 111 by the upstream cut-and-raised slit end portion 111 d, and the flow rate of the heat exchange air flowing through the cut-and-raised slit 111 It is possible to reduce the difference in flow velocity from the flow velocity of
- the heat exchanger 307 has the same configuration as the heat exchanger 207 according to Comparative Example 1 described above, except for the upstream cut-and-raised slit end angle A12 and the downstream cut-and-raised slit end angle A22. . That is, the heat exchanger 307 has a plurality of fins 308, the fins 308 are penetrated by the heat transfer tubes 309, and have three cut-and-raised slits.
- the three cut-and-raise slits include an upstream cut-and-raise slit 311a and a downstream cut-and-raise slit 311c.
- the upstream cut-and-raised slit end angle A12 is the angle between the upstream-side cut-and-raised slit end 311d of the upstream cut-and-raised slit 311a and an orthogonal straight line orthogonal to the edge of the fin 308.
- FIG. The downstream side cut-and-raised slit end angle A22 is the angle formed by the downstream side cut-and-raised slit end 311f of the downstream side cut-and-raised slit 311c and an orthogonal straight line perpendicular to the edge of the fin 308 .
- the heat exchanger 107 according to Embodiment 1 has the following effects compared to the heat exchanger 307 according to Comparative Example 2. That is, the heat exchanger 107 has the upstream cut-and-raised slit end angle A1 of 30°, thereby suppressing the collision of the flowing heat exchange air at the upstream cut-and-raised slit end 111d. Airflow inflow to the side can be secured.
- the downstream side cut-and-raised slit end angle A2 is set to 45°, so that the heat exchange air is guided downstream of the heat transfer tube 109 by the downstream side cut-and-raised slit end portion 111f.
- the dead water area in the lower reaches of the river can be reduced.
- the heat exchanger 107 suppresses excessive air guidance to the cut-and-raised slit 111 by the upstream cut-and-raised slit end portion 111 d, and the flow rate of the heat exchange air flowing through the cut-and-raised slit 111
- It is possible to reduce the difference in flow velocity from the flow velocity of Heat exchanger 107 according to Embodiment 1 reduces the flow velocity difference between the flow velocity of the heat exchange air flowing through cut-and-raised slit 111 and the flow velocity of the downstream portion of heat transfer tube 109, so that after passing through heat exchanger 107
- the wind speed distribution of the heat exchange air can be made substantially uniform.
- the cross-flow fan 106 which is arranged downstream of the heat exchanger 107 with a distance of 10 mm between the downstream end 108a of the fin 108 and the outer peripheral end 106a of the blade of the cross-flow fan 106, has the following effects. have That is, the heat exchange air flows into the cross-flow fan 106 with substantially the same relative speed difference in any direction in the circumferential direction of the cross-flow fan 106, and noise generated in the cross-flow fan 106 can be suppressed. .
- the distance H1 between the center line 110 connecting the centers of the heat transfer tubes 109 and the upstream edge of the upstream cut-and-raised slit 111a is 4.0 mm.
- the distance H2 between the center line 110 connecting the centers of the heat transfer tubes 109 and the downstream edge of the downstream cut-and-raised slit 111c is 2.5 mm. That is, since H1>H2, the heat exchanger 107 eliminates the swirling flow of heat exchange air generated when passing through the downstream cut-and-raised slit 111c before it reaches the downstream end 108a of the fin 108. .
- the heat exchanger 107 can suppress turbulence of the airflow after passing through the heat exchanger 107, turbulence of the airflow flowing into the cross-flow fan 106 disposed downstream of the heat exchanger 107 can be suppressed. Noise generated by the flow fan 106 can be suppressed.
- heat exchanger 107 includes fins 108 and heat transfer tubes 109 penetrating fins 108 .
- the fins 108 have at least two cut-and-raised slits 111 substantially orthogonal to the edges of the fins 108 between the heat transfer tubes 109 in the stepwise direction.
- the upstream side cut-and-raised slit end angle A1 and the downstream side cut-and-raised slit end angle A2 are set to satisfy A1 ⁇ A2.
- the upstream cut-and-raised slit end angle A1 is orthogonal to the upstream cut-and-raised slit end portion 111d of the most upstream cut-and-raised slit 111a of the cut-and-raised slits 111 and the edge of the fin 108 when viewed from the airflow direction. It is the angle formed by an orthogonal straight line.
- the downstream cut-and-raised slit end angle A2 is defined by the downstream cut-and-raised slit end 111f of the most downstream cut-and-raised slit 111c among the cut-and-raised slits 111 and the edge of the fin 108 when viewed from the airflow direction. It is the angle formed by an orthogonal straight line.
- the heat exchanger 107 can reduce the pressure loss by suppressing the collision of the circulating heat exchange air at the upstream cut-and-raised slit end portion 111d.
- the heat exchanger 107 guides the circulating heat exchange air to the downstream side of the heat transfer tube 109 by the downstream cut-and-raised slit end portion 111f, and reduces the dead water area of the downstream portion of the heat transfer tube 109 to improve the heat exchange efficiency. be able to.
- the heat exchanger 107 suppresses excessive air induction to the cut-and-raised slit 111 by the upstream cut-and-raised slit end portion 111d, and the flow rate of the heat exchange air flowing through the cut-and-raised slit 111 and the heat transfer tube 109 downstream portion It is possible to reduce the difference in flow velocity. By reducing this flow velocity difference, the heat exchanger 107 can substantially uniform the wind velocity distribution of the heat-exchanged air after passing through the heat exchanger 107 . That is, the heat exchanger 107 guides the circulating heat exchange air to the downstream side of the heat transfer tube 109 while reducing the pressure loss, and reduces the dead water area downstream of the heat transfer tube 109 to improve the heat exchange efficiency. The noise can be suppressed by substantially uniforming the distribution.
- the heat exchanger 107 may have a downstream cut-and-raise slit end angle A2 of A2>35°.
- the heat exchanger 107 effectively guides the airflow to the downstream side of the heat transfer tube 109 along the downstream side cut-and-raised slit end portion 111f.
- the dead water area can be further reduced to improve heat exchange efficiency.
- the heat exchanger 107 can further reduce the flow velocity difference between the flow velocity of the heat exchange air flowing through the cut-and-raised slit 111 and the flow velocity of the heat transfer tube 109 downstream.
- the wind speed distribution of the heat exchange air can be made substantially uniform.
- the heat exchanger 107 may have a tube diameter D of the heat transfer tube 109 and a slit width L of the downstream cut-and-raised slit 111c satisfying L/D ⁇ 0.2.
- the airflow can be guided downstream of the heat transfer tube 109 . That is, such a heat exchanger 107 can further reduce the dead water area downstream of the heat transfer tubes 109 to improve the heat exchange efficiency, and further improve the uniformity of the airflow distribution after passing through the heat exchanger 107. can.
- the heat exchanger 107 may have the following relationship between the distance H1 and the distance H2. That is, the heat exchanger 107 has a distance H1 between the center line 110 connecting the center of the heat transfer tube 109 and the upstream edge of the upstream cut-and-raised slit 111a, and the center line 110 connecting the center of the heat transfer tube 109 and the downstream cut.
- the distance H2 between the raising slit 111c and the downstream edge may be H1>H2.
- the heat exchanger 107 effectively guides the circulating heat exchange air to the downstream side of the heat transfer tube 109 in the vicinity of the heat transfer tube 109 by the downstream side cut-and-raised slit end portion 111f.
- the downstream dead water area can be reduced to improve heat exchange efficiency.
- the heat exchanger 107 brings the downstream edge of the downstream cut-and-raised slit 111 c closer to the center line 110 connecting the center of the heat transfer tube 109 , and the downstream edge of the downstream cut-and-raised slit 111 c and the downstream side of the fin 108 .
- the distance to the edge 108a can be increased.
- heat exchanger 107 eliminates the swirling flow of heat exchange air that is generated when passing through downstream side cut-and-raised slit 111c before reaching downstream end 108a of fin 108, and after passing through heat exchanger 107 airflow turbulence can be suppressed.
- the air conditioner 100 includes a heat exchanger 107, and a cross-flow fan 106 is arranged downstream of the fins 108 in the airflow direction. Also, in the air conditioner 100, the distance between the downstream end 108a of the fin 108 and the outer peripheral blade end 106a of the crossflow fan 106 is set to 12 mm or less.
- the air conditioner 100 guides the airflow to the downstream side of the heat transfer tube 109 along the downstream cut-and-raised slit end 111f, and can reduce the dead water area downstream of the heat transfer tube 109.
- the air conditioner 100 can reduce the flow velocity difference between the flow velocity passing through the cut-and-raised slit 111 and the flow velocity at the downstream portion of the heat transfer tube 109 .
- the air conditioner 100 can substantially homogenize the distribution of the airflow flowing into the cross-flow fan 106 which is narrowly arranged with a distance of 12 mm or less from the heat exchanger 107 downstream of the heat exchanger 107 .
- the blade outer peripheral side end 106a collides with the incoming airflow with a substantially equal relative speed difference in any direction in the circumferential direction of the crossflow fan 106, thereby suppressing the noise generated by the crossflow fan 106. can do.
- the heat exchanger 107 In the heat exchanger 107 according to Embodiment 1, the case where the tube diameter D of the heat transfer tube 109 is 5 mm and the slit width L of the downstream side cut-and-raised slit 111c is 1 mm has been described as an example, but this is just an example. be. That is, the heat exchanger in the present disclosure may satisfy L/D ⁇ 0.2.
- the distance H1 between center line 110 and the upstream edge of upstream cut-and-raised slit 111a is 4.0 mm
- the distance H1 between center line 110 and downstream cut-and-raised slit 111c The case where the distance H2 to the side edge is 2.5 mm has been described as an example. This is an example, and the heat exchanger in the present disclosure may satisfy H1>H2. It should be noted that H2 is preferably 1/4 or more of the pipe diameter D as described above.
- the distance between the downstream end 108a of the fin 108 and the blade outer peripheral end 106a of the crossflow fan 106 is 10 mm has been described as an example, but this is an example. is. That is, in the air conditioner according to the present disclosure, the distance between the downstream end of the fin and the outer peripheral end of the blade of the crossflow fan may be 12 mm or less, for example, 11 mm or 9 mm.
- the heat exchanger according to the present disclosure is suitable for use in, for example, domestic air conditioning and commercial air conditioning.
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Abstract
Description
発明者らが本開示に想到するに至った当時、空気調和機では、近年、搭載されるフィンチューブ熱交換器において、フィンに設けるスリットの形状により、熱交換性能向上が図られていた。
図1は、実施の形態1に係る空気調和機100の室内機を示す断面図である。また、図2は、実施の形態1に係る熱交換器107の一部の構成を示す図である。以下、図1、2を用いて、実施の形態1に係る空気調和機100の構成を説明する。
空気調和機100の室内機は、図1に示すように、吸込口101と、吹出口102を有する本体ケーシング103と、スタビライザ104と、リアガイダ105と、クロスフローファン106と、熱交換器107と、を備えている。
以上のように構成された熱交換器107について、以下その動作、作用を、図3を用いて説明する。
以上のように、本実施の形態において、熱交換器107は、フィン108と、フィン108を貫通する伝熱管109とを備える。フィン108は、伝熱管109の段方向間にフィン108の端縁に対して略直交する少なくとも2枚以上の切り起こしスリット111を有する。熱交換器107は、上流側切り起こしスリット端部角度A1と、下流側切り起こしスリット端部角度A2とを、A1<A2とする。上流側切り起こしスリット端部角度A1は、切り起こしスリット111のうち、気流方向から見て最上流の上流側切り起こしスリット111aの上流側切り起こしスリット端部111dとフィン108の端縁に直交する直交直線とが成す角の角度である。また、下流側切り起こしスリット端部角度A2は、切り起こしスリット111のうち、気流方向から見て最下流の下流側切り起こしスリット111cの下流側切り起こしスリット端部111fとフィン108の端縁に直交する直交直線とが成す角の角度である。
2 伝熱フィン
3 カラー部
4 伝熱管
5a 中心線上の切起し片部
5b 中間列の切起し片部
5c フィン端縁に近い切起し片部
5d 中心線上の切起しスリット端部
5e 中間列の切起しスリット端部
5f フィン端縁に近い切起しスリット端部
100 空気調和機
101 吸込口
102 吹出口
103 本体ケーシング
104 スタビライザ
105 リアガイダ
106 クロスフローファン
106a ブレード外周側端
107 熱交換器
108 フィン
108a 下流側端
109 伝熱管
110 中心線
111 切り起こしスリット
111a 上流側切り起こしスリット
111b 中央切り起こしスリット
111c 下流側切り起こしスリット
111d 上流側切り起こしスリット端部
111e 中央側切り起こしスリット端部
111f 下流側切り起こしスリット端部
207 比較例1に係る熱交換器
208 フィン
209 伝熱管
211a 上流側切り起こしスリット
211c 下流側切り起こしスリット
211d 上流側切り起こしスリット端部
211f 下流側切り起こしスリット端部
307 比較例2に係る熱交換器
308 フィン
309 伝熱管
311a 上流側切り起こしスリット
311c 下流側切り起こしスリット
311d 上流側切り起こしスリット端部
311f 下流側切り起こしスリット端部
A1 上流側切り起こしスリット端部角度
A2 下流側切り起こしスリット端部角度
A11 上流側切り起こしスリット端部角度
A12 上流側切り起こしスリット端部角度
A21 下流側切り起こしスリット端部角度
A22 下流側切り起こしスリット端部角度
D 管径
H1 伝熱管の中心を結ぶ中心線と上流側切り起こしスリットの上流側端縁との距離
H2 伝熱管の中心を結ぶ中心線と下流側切り起こしスリットの下流側端縁との距離
L 下流側切り起こしスリットのスリット幅
X1 中間列の切起し端部の角度
X2 フィン端縁に近い切起し端部の角度
Claims (5)
- フィンと、前記フィンを貫通する伝熱管とを備え、
前記フィンは、前記伝熱管の段方向間に前記フィンの端縁に対して略直交する少なくとも2枚以上の切り起こしスリットを有し、
前記切り起こしスリットのうち、気流方向から見て最上流の上流側切り起こしスリットの上流側切り起こしスリット端部と前記フィンの前記端縁に直交する直交直線とが成す上流側切り起こしスリット端部角度A1と、気流方向から見て最下流の下流側切り起こしスリットの下流側切り起こしスリット端部と前記直交直線とが成す下流側切り起こしスリット端部角度A2とを、A1<A2とする
ことを特徴とする熱交換器。 - 前記下流側切り起こしスリット端部角度A2を、A2>35°とする
ことを特徴とする請求項1に記載の熱交換器。 - 前記伝熱管の管径Dと、前記下流側切り起こしスリットのスリット幅Lとを、L/D≧0.2とする
ことを特徴とする請求項1又は2のいずれかに記載の熱交換器。 - 前記伝熱管の中心を結ぶ中心線と前記上流側切り起こしスリットの上流側端縁との距離H1と、前記伝熱管の中心を結ぶ前記中心線と前記下流側切り起こしスリットの下流側端縁との距離H2とを、H1>H2とする
ことを特徴とする請求項1~3のいずれか1項に記載の熱交換器。 - 請求項1~4のいずれか1項に記載の熱交換器を備える空気調和機であって、
前記フィンの気流方向から見て下流側にクロスフローファンが配設され、
前記フィンの下流側端と前記クロスフローファンのブレード外周側端との距離を12mm以下とする
ことを特徴とする空気調和機。
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EP22824746.6A EP4357717A1 (en) | 2021-06-16 | 2022-05-23 | Heat exchanger and air conditioner |
CN202280042542.8A CN117501062A (zh) | 2021-06-16 | 2022-05-23 | 热交换器和空气调节机 |
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JP2021-099916 | 2021-06-16 | ||
JP2021099916A JP2022191603A (ja) | 2021-06-16 | 2021-06-16 | 熱交換器 |
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WO2022264752A1 true WO2022264752A1 (ja) | 2022-12-22 |
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PCT/JP2022/021053 WO2022264752A1 (ja) | 2021-06-16 | 2022-05-23 | 熱交換器及び空気調和機 |
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EP (1) | EP4357717A1 (ja) |
JP (1) | JP2022191603A (ja) |
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WO (1) | WO2022264752A1 (ja) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02242092A (ja) * | 1989-03-13 | 1990-09-26 | Mitsubishi Electric Corp | 熱交換器 |
JPH04316992A (ja) * | 1991-04-15 | 1992-11-09 | Kubota Corp | フィン付き熱交換器 |
JPH09105595A (ja) * | 1995-01-23 | 1997-04-22 | Lg Electronics Inc | フィンチューブ型熱交換器 |
JPH10300376A (ja) * | 1997-04-25 | 1998-11-13 | Matsushita Refrig Co Ltd | フィン付熱交換器 |
JPH11337281A (ja) * | 1998-05-29 | 1999-12-10 | Matsushita Refrig Co Ltd | フィン付熱交換器 |
JP2003247795A (ja) | 2002-02-22 | 2003-09-05 | Toshiba Kyaria Kk | 熱交換器 |
JP2005315557A (ja) * | 2004-04-28 | 2005-11-10 | Samsung Electronics Co Ltd | 熱交換器 |
-
2021
- 2021-06-16 JP JP2021099916A patent/JP2022191603A/ja active Pending
-
2022
- 2022-05-23 WO PCT/JP2022/021053 patent/WO2022264752A1/ja active Application Filing
- 2022-05-23 EP EP22824746.6A patent/EP4357717A1/en active Pending
- 2022-05-23 CN CN202280042542.8A patent/CN117501062A/zh active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02242092A (ja) * | 1989-03-13 | 1990-09-26 | Mitsubishi Electric Corp | 熱交換器 |
JPH04316992A (ja) * | 1991-04-15 | 1992-11-09 | Kubota Corp | フィン付き熱交換器 |
JPH09105595A (ja) * | 1995-01-23 | 1997-04-22 | Lg Electronics Inc | フィンチューブ型熱交換器 |
JPH10300376A (ja) * | 1997-04-25 | 1998-11-13 | Matsushita Refrig Co Ltd | フィン付熱交換器 |
JPH11337281A (ja) * | 1998-05-29 | 1999-12-10 | Matsushita Refrig Co Ltd | フィン付熱交換器 |
JP2003247795A (ja) | 2002-02-22 | 2003-09-05 | Toshiba Kyaria Kk | 熱交換器 |
JP2005315557A (ja) * | 2004-04-28 | 2005-11-10 | Samsung Electronics Co Ltd | 熱交換器 |
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EP4357717A1 (en) | 2024-04-24 |
JP2022191603A (ja) | 2022-12-28 |
CN117501062A (zh) | 2024-02-02 |
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