CN103299150B

CN103299150B - Heat exchanger and air conditioner

Info

Publication number: CN103299150B
Application number: CN201280005048.0A
Authority: CN
Inventors: 神藤正宪; 织谷好男; 吉冈俊; 藤野宏和; 镰田俊光
Original assignee: Daikin Industries Ltd
Current assignee: Daikin Industries Ltd
Priority date: 2011-01-21
Filing date: 2012-01-23
Publication date: 2015-09-16
Anticipated expiration: 2032-01-23
Also published as: KR20130129428A; CN103299150A; KR101451056B1; EP2657637A4; JP5141840B2; AU2012208125A1; JP2012163320A; EP2657637A1; WO2012098919A1; US20130299141A1

Abstract

Many flat tubes (33) and multiple fin (36) is provided with in heat exchanger (30).Fin (36) in tabular is arranged on the bearing of trend of flat tube (33), with leaving certain intervals each other.Flat tube (33) is inserted in the pipe insertion section (46) of fin (36).On fin (36), the part between neighbouring flat tube (33) forms heat transfer part (70).Heat transfer part (70) is provided with swells (81 ~ 83) and raised piece (50,60).Swells (81 ~ 83) is arranged in the part of close windward side of heat transfer part (70), and this swells (81 ~ 83) is formed by making heat transfer part (70) heave in mountain shape.Raised piece (50,60) is arranged in the part of close leeward side of heat transfer part (70), is formed by cutting heat transfer part (70).

Description

Heat exchanger and air conditioner

Technical field

The present invention relates to and a kind ofly comprise flat tube and fin and make to carry out at the fluid of flat Bottomhole pressure and air the heat exchanger of heat exchange.

Background technology

Up to now, the heat exchanger of flat tube and fin is comprised known to everybody.Such as, in the heat exchanger disclosed in patent document 1, the many flat tubes extended in left-right direction arrange with leaving predetermined distance along the vertical direction each other, and the fin in tabular arranges along the bearing of trend of flat tube with leaving predetermined distance each other.In the heat exchanger disclosed in patent document 2 and patent document 3, the many flat tubes extended in left-right direction arrange with leaving predetermined distance along the vertical direction each other, are respectively arranged with a corrugated fin between adjacent flat tube.In these heat exchangers, with fin contacts the air that flows and carry out heat exchange at the fluid of flat Bottomhole pressure.

Under normal conditions, the fin of this heat exchanger is formed with the raised piece (louver) for promoting heat transfer.Such as, shown in Fig. 4 of patent document 3, the fin of existing heat exchanger has by direction row the multiple raised piece cutting and be highly equal to each other along air.

Patent document 1: Japanese Laid-Open Patent Publication JP 2003-262485 publication

Patent document 2: Japanese Laid-Open Patent Publication JP 2010-002138 publication

Patent document 3: Japanese Laid-Open Patent Publication 11-294984 publication

Summary of the invention

-technical problem that invention will solve-

In the refrigerant loop of air conditioner, be provided with the outdoor heat converter making cold-producing medium and outdoor air carry out heat exchange.Heat in running at air conditioner, outdoor heat converter plays the effect of evaporimeter.If the refrigerant evaporating temperature in outdoor heat converter is lower than 0 DEG C, the moisture in air will frosting (namely freezing) and being attached on outdoor heat converter.Therefore, heat in running under the state that outside air temperature is lower, such as, often will carry out the defrosting action of melting for making to be attached to the frost on outdoor heat converter through the stipulated time.In defrosting action, the high temperature refrigerant sprayed from compressor is supplied to outdoor heat converter, has been attached to cooled dose of the frost heating on outdoor heat converter and has melted.In defrosting action, because the cold-producing medium sprayed from compressor is not be supplied to indoor heat converter but be supplied to outdoor heat converter, so be interrupted being sent to indoor air-supply by the air heated.

On the other hand, the heat exchanger comprising flat tube and fin can be used as the outdoor heat converter of air conditioner.But, in existing this heat exchanger, usually near the leading edge of fin until the position of trailing edges is provided with raised piece.Therefore, in the outdoor heat converter be made up of this heat exchanger, frost is intensively attached in the part of windward side of fin, and air stream is hindered by the frost adhered to.Consequently, although frost is not almost attached in the part of leeward side of fin, reduced by the flow of the air of heat exchanger, the heat exchange amount between cold-producing medium and air reduces, and is thus absorbed in the state needing to carry out defrosting action.Therefore, if with the outdoor heat converter of this heat exchanger as air conditioner, then by being sent to indoor air-supply by the air heated, owing to carrying out defrosting action, interrupted frequency will increase, and likely causes the essence heating capacity of air conditioner to decline.

The present invention is just in view of the premises completes.Its object is to: in the heat exchanger comprising flat tube and fin, the ability of the heat exchanger be attached to caused by the frost on the fin time till reaching the limitation that declines is increased.

-in order to technical solution problem technical scheme-

The invention of first aspect is using following heat exchanger as object, this heat exchanger comprises many flat tubes 33 and multiple fin 35, 36, many these flat tubes 33 are arranged above and below, the path 34 of fluid is formed in the inside of many these flat tubes 33, this fin 35 multiple, 36 will be divided into multiple venting flow path 40 of air flowing between adjacent described flat tube 33, described fin 35, 36 have multiple heat transfer part 70, this heat transfer part 70 is formed as extending to the tabular of another flat tube 33 from the flat tube 33 in adjacent described flat tube 33 and forms the sidewall of described venting flow path 40.Described fin 35,36 each described in heat transfer part 70 is provided with multiple raised piece 50,60 and swells 81 ~ 83, this raised piece 50,60 multiple is formed by cutting this heat transfer part 70, this swells 81 ~ 83 is arranged on than described raised piece 50,60 also in the part of windward side, this swells 81 ~ 83 is formed by making described heat transfer part 70 heave, and is extended to air by the direction that direction is crossing.

In the invention of first aspect, in heat exchanger 30, be provided with many flat tubes 33 and multiple fin 35,36.The heat transfer part 70 of fin 35,36 is provided with between the flat tube 33 be arranged above and below.In heat exchanger 30, air is by the venting flow path 40 between the flat tube 33 that is arranged above and below, and this air carries out heat exchange with the fluid of the path 34 flowed through in flat tube 33.

In the invention of first aspect, each heat transfer part 70 of fin 35,36 is provided with swells 81 ~ 83 and raised piece 50,60.Swells 81 ~ 83 is arranged on the ratio raised piece 50,60 of heat transfer part 70 also in the part of windward side.Heat transfer part 70 is formed swells 81 ~ 83 or raised piece 50,60, the air miscarriage in venting flow path 40 is raw disorderly, promotes that air and fin conduct heat.

Generally speaking, the raised piece 50,60 formed by cutting heat transfer part 70 makes the raw disorderly effect of air miscarriage be greater than the effect that the swells 81 ~ 83 formed by making heat transfer part 70 heave makes the raw disorder of air miscarriage.Therefore, under normal conditions, the heat transfer facilitation effect of raised piece 50,60 is greater than the heat transfer facilitation effect of swells 81 ~ 83.

When the temperature of fluid of flowing in flat tube 33 is lower than 0 DEG C, the moisture frosting in air and being attached on the surface of heat transfer part 70.On the other hand, on each heat transfer part 70 of the fin 35,36 of the invention of first aspect, in the part of windward side, be also formed with the lower swells 81 ~ 83 of heat transfer facilitation effect in the raised piece 50,60 higher than heat transfer facilitation effect.Therefore, compared with being formed in the situation on whole heat transfer part 70 with raised piece 50,60, the frost amount be attached in the part of the close windward side of heat transfer part 70 reduces, and the frost amount be attached in the part of the close leeward side of heat transfer part 70 increases.Therefore, on the heat transfer part 70 of the invention in this, the frost amount be attached in the part of windward side reduces with the difference of the frost amount be attached in the part of leeward side.

The invention of second aspect, in the invention of above-mentioned first aspect, in a part of raised piece 50 on the position being at least positioned near described swells 81 ~ 83 in described raised piece 50,60 on each heat transfer part 70 being arranged on described fin 35,36, the leeward side of this raised piece 50 cut end 53 to this swells 81 ~ 83 to heave direction outstanding.

On each heat transfer part 70 of the fin 35,36 of the invention of second aspect, be positioned at the leeward side of a part of raised piece 50 on the position near swells 81 ~ 83 cut end 53 to swells 81 ~ 83 to heave direction outstanding.That is, a part of raised piece 50 be positioned on the position of swells 81 ~ 83 tilts towards the direction that the part being positioned at leeward side with swells 81 ~ 83 is contrary.Cross swells 81 ~ 83 and flow through raised piece 50 on position that the air collides come is positioned near swells 81 ~ 83, the flow direction of this air is changed.Therefore, crossed swells 81 ~ 83 to flow through the air circulation come and cross the raised piece 50 on position that collision is positioned near swells 81 ~ 83 and produce disorder further.

The invention of the third aspect, be above-mentioned first or second aspect invention in, described raised piece 50, 60 cut end 53, 63, by cardinal margin portion 54, 64, upper edge part 55, 65 and edge, downside 56, 66 are formed, this upper edge part 55, 65 is from this cardinal margin portion 54, the upper end of 64 extends to this raised piece 50, the part of the upper end of 60, this upper edge part 55, 65 relative to this cardinal margin portion 54, 64 tilt, edge 56 on the downside of this, 66 is from this cardinal margin portion 54, the lower end of 64 extends to this raised piece 50, the part of the lower end of 60, edge 56 on the downside of this, 66 relative to this cardinal margin portion 54, 64 tilt, at described fin 35, on each heat transfer part 70 of 36, described raised piece 50 at least partially, 60 is edge, described downside 56 asymmetric raised piece less relative to the gradient in described cardinal margin portion 54 than described upper edge part 55 relative to the gradient in described cardinal margin portion 54.

In the invention of the third aspect, raised piece 50,60 cut end 53,63 by cardinal margin portion 54,64, upper edge part 55,65 and edge, downside 56,66 form.On each heat transfer part 70 of fin 35,36, the raised piece be at least partially formed in the raised piece 50,60 on this heat transfer part 70 is asymmetric raised piece 50a.In asymmetric raised piece 50a, edge, downside 56 is less relative to the gradient in cardinal margin portion 54 than upper edge part 55 relative to the gradient in cardinal margin portion 54.Therefore, cut between end 53 at air by asymmetric raised piece 50a adjacent on direction, the gap each other of edge 56, downside is in more elongated shape compared with the gap each other of upper edge part 55.

The heat exchanger 30 of the invention of the third aspect fin 35,36 on the surface, or the condensate moisture in air, or the frost be attached on fin 35,36 melts, and produces condensed water thus.The condensed water produced on fin 35,36 surface also can flow into and cut end 53 each other at air by asymmetric raised piece 50a adjacent on direction.The condensed water flowed between asymmetric raised piece 50a is inhaled into due to capillarity in gap each other, elongated edge, downside 56.

The invention of fourth aspect is in the invention of the above-mentioned third aspect, and on each heat transfer part 70 of described fin 35,36, the raised piece 50 be formed in the part adjacent with described flat tube 33 is described asymmetric raised piece.

In the invention of fourth aspect, the part adjacent with flat tube 33 of each heat transfer part 70 of fin 35,36 is formed with raised piece 50, and a part of raised piece 50 wherein or all raised piece 50 are asymmetric raised piece.

The invention of the 5th aspect, in the above-mentioned first invention to the either side in fourth aspect, each heat transfer part 70 of described fin 35,36 comprises the leeward end 73 being positioned at and going back on the position of leeward side than described flat tube 33, and the described leeward end 73 of each heat transfer part 70 of described fin 35,36 is provided with described raised piece 60.

In invention in the 5th, each heat transfer part 70 of fin 35,36 comprises leeward end 73.The leeward end 73 of heat transfer part 70 is projected into than flat tube 33 also near the position of leeward side.The leeward end 73 of the heat transfer part 70 of the invention in this is provided with raised piece 60.Should illustrate, on the heat transfer part 70 of the invention in this, as long as be provided with raised piece 50,60 at least leeward end 73.That is, on the heat transfer part 70 of the invention in this, also can from leeward end 73 until be also provided with multiple raised piece 50,60 near the position of the part of windward side than leeward end 73.

The invention of the 6th aspect, be in above-mentioned the first to the five in either side invention in, on each heat transfer part 70 of described fin 35,36, be disposed with multiple described swells 81 ~ 83 along air by direction.

In invention in the 6th, each heat transfer part 70 of fin 35,36 is provided with multiple swells 81 ~ 83.On each heat transfer part 70, multiple swells 81 ~ 83 is arranged along air by direction.Air stream in venting flow path 40 produces disorder when crossing multiple swells 81 ~ 83.

The invention of the 7th aspect, in the invention in the above-mentioned 6th, in multiple described swells 81 ~ 83 on each heat transfer part 70 being formed in described fin 35,36, the air be positioned near the swells 81 on the position of windward side is the widest by the width in direction.

Herein, the air of swells 81 ~ 83 is wider by the width in direction, and the air change in the flowing direction of flowing along swells 81 ~ 83 is fewer, and consequently swells 81 ~ 83 promotes that the effect of heat transfer also can become less.On the other hand, the temperature difference flowing through the air of venting flow path 40 and heat transfer part 70 is maximum in the porch of venting flow path 40, diminishes gradually with near leeward side.

In invention in the 7th, on each heat transfer part 70 of fin 35,36, the air be positioned near that swells 81 on the position of windward side is wider by the width in direction than the air of other swells 82,83 by the width in direction.That is, on each heat transfer part 70 of fin 35,36, the position of the larger close windward side of the temperature difference of the air and heat transfer part 70 that flow through venting flow path 40 is provided with facilitation effect of conducting heat less, swells 81 that width is the widest.Therefore, on each heat transfer part 70 of fin 35,36, the frost amount be attached in the part of the close windward side being provided with the widest swells of width 81 is inhibited.

The invention of eighth aspect, in the invention in the above-mentioned 6th or the 7th, in multiple described swells 81 ~ 83 on each heat transfer part 70 being formed in described fin 35,36, the height heaving direction be positioned near the swells 81 on the position of windward side is minimum.

Herein, the height heaving direction of swells 81 ~ 83 is lower, and the air change in the flowing direction of flowing along swells 81 ~ 83 is fewer, and consequently swells 81 ~ 83 promotes that the effect of heat transfer also can become less.On the other hand, the temperature difference flowing through the air of venting flow path 40 and heat transfer part 70 is maximum in the porch of venting flow path 40, diminishes gradually with near leeward side.

In the invention of eighth aspect, on each heat transfer part 70 of fin 35,36, the height heaving direction be positioned near other swells 82,83 of the aspect ratio heaving direction of the swells 81 on the position of windward side is low.That is, on each heat transfer part 70 of fin 35,36, the position of the larger close windward side of the temperature difference of the air and heat transfer part 70 that flow through venting flow path 40 is provided with facilitation effect of conducting heat is less, highly minimum swells 81.Therefore, on each heat transfer part 70 of fin 35,36, the frost amount be attached in the part of the close windward side being provided with highly minimum swells 81 is inhibited.

The invention of the 9th aspect, to in the invention of the either side in eighth aspect the above-mentioned 6th, on each heat transfer part 70 of described fin 35,36, the end 38 of the windward side from this heat transfer part 70, to the air than this heat transfer part 70, the part of central authorities also near the position of leeward side in direction is provided with multiple described swells 81 ~ 83.

In invention in the 9th, on each heat transfer part 70 of fin 35,36, be provided with multiple swells 81 ~ 83 in the air of heat transfer part 70 region over half by the length in direction by the length in direction at air.

The invention of the tenth aspect, be in the above-mentioned six to the nine in either side invention in, each heat transfer part 70 of described fin 35,36 comprises the windward end 72 being positioned at and going back on the position of windward side than described flat tube 33, on each heat transfer part 70 of described fin 35,36, from described windward end 72 until the position of the part of the leeward side of this windward end 72 is provided with multiple described swells 81 ~ 83.

In invention in the tenth, each heat transfer part 70 of fin 35,36 is provided with windward end 72, on each heat transfer part 70, windward end 72 and these two parts of the part adjacent with the leeward side of windward end 72 are provided with multiple swells 81 ~ 83.

The invention of the 11 aspect, be in the above-mentioned six to the ten in either side invention in, on each heat transfer part 70 of described fin 35,36, the lower end of each swells 81 ~ 83 be just located below the closer to leeward side tilts.

In invention in the 11, the lower end being arranged on the swells 81 ~ 83 on each heat transfer part 70 of fin 35,36 tilts.The lower end of each swells 81 ~ 83 be just located below the closer to leeward side tilts.Therefore, on each heat transfer part 70 of fin 35,36, the distance counted till the lower end of swells 81 ~ 83 from the flat tube 33 adjacent with the lower portion of this heat transfer part 70 shortens gradually with near leeward side.

Herein, in the defrosting action making the frost thawing be attached on fin 35,36, the condensed water that frost melts and produces flows down along the surface of heat transfer part 70 from swells 81 ~ 83.The condensed water flowed down from swells 81 ~ 83 accumulates in the flat tube 33 adjacent with the lower portion of heat transfer part 70.On the other hand, in the invention in the 11, the distance counted till the lower end of swells 81 ~ 83 from the flat tube 33 of the below being positioned at heat transfer part 70 shortens gradually with near leeward side.Therefore, to flow down from swells 81 ~ 83 and the condensed water accumulated in flat tube 33 is inhaled into gradually due to capillarity and counts the shorter leeward side of distance till the lower end of swells 81 ~ 83 from flat tube 33.

The invention of the 12 aspect, be in above-mentioned the first to the ten one in either side invention in, described fin 36 is formed as the tabular being provided with multiple notch 45, this notch 45 is used for described flat tube 33 to insert in this notch 45, described fin 36 is arranged along the bearing of trend of described flat tube 33 with leaving predetermined distance each other, described fin 36 periphery of described notch 45 clips described flat tube 33, on described fin 36, the part between notch 45 adjacent in the vertical direction forms described heat transfer part 70.

In invention in the 12, multiple fin 36 being formed as tabular is arranged along the bearing of trend of flat tube 33 with leaving predetermined distance each other.Each fin 36 is formed with multiple notch 45, and this notch 45 is used for described flat tube 33 to insert in this notch 45.The circumference of the notch 45 of each fin 36 clips flat tube 33.Part between the neighbouring notch 45 of each fin 36 forms heat transfer part 70.

The invention of the 13 aspect, be in above-mentioned the first to the ten one in either side invention in, described fin 35 to be arranged between adjacent described flat tube 33 and the corrugated fin of crawling up and down, and there is multiple described heat transfer part 70 and multiple middle plate portion 41, this heat transfer part 70 multiple arranges along the bearing of trend of described flat tube 33, in this, plate portion 41 is the parts be connected with the upper end of this adjacent heat transfer part 70 or lower end, and in this, plate portion 41 engages with this flat tube 33.

In invention in the 13, for the fin 35 of corrugated fin is arranged between adjacent flat tube 33.Each fin 35 is provided with multiple heat transfer parts 70 that the bearing of trend along flat tube 33 arranges.On each fin 35, adjacent heat transfer part 70 is connected with middle plate portion 41, and in this, plate portion 41 engages with the flattened side of flat tube 33.

The invention of fourteenth aspect with air conditioner 10 for object, described air conditioner 10 comprises the refrigerant loop 20 of the heat exchanger 30 involved by invention of the either side be provided with in the above-mentioned the first to the ten three aspect, and described air conditioner 10 makes refrigerant circulation and carries out kind of refrigeration cycle in described refrigerant loop 20.

In the invention of fourteenth aspect, the heat exchanger 30 involved by invention of the either side in the above-mentioned the first to the ten three aspect is connected with refrigerant loop 20.In heat exchanger 30, in the flow of refrigerant of refrigerant loop 20 Inner eycle through the path 34 of flat tube 33, and carry out heat exchange with the air flowed in venting flow path 40.

-invention effect-

On each heat transfer part 70 of fin 35,36 of the present invention, in the part of windward side, be also formed with the lower swells 81 ~ 83 of heat transfer facilitation effect than raised piece 50,60.Therefore, the frost amount be attached in the part of the close windward side of heat transfer part 70 reduces with the difference of the frost amount be attached in the part of its leeward side.Consequently, in heat exchanger 30 of the present invention, compared with being intensively attached to the existing heat exchanger in the part of the windward side of fin with frost, the white adhesion amount when decline of heat-exchange capacity reaches the limitation increases.Therefore, according to the present invention, the ability of the heat exchanger 30 caused by attachment of the frost time till reaching the limitation that declines can be made to increase, the frequency decrease of defrosting action can be made.

On each heat transfer part 70 of the invention of above-mentioned second aspect, be positioned at the leeward side of a part of raised piece 50 on the position near swells 81 ~ 83 cut end 53 to swells 81 ~ 83 to heave direction outstanding.Therefore, crossed swells 81 ~ 83 to flow through the air circulation come and cross the raised piece 50 on position that collision is positioned near swells 81 ~ 83 and produce disorder further.Therefore, according to the invention of this aspect, can reliably promote that fin 35,36 and air conduct heat each other in the part being formed with raised piece 50,60 of heat transfer part 70.

In the invention of the above-mentioned third aspect, the raised piece be at least partially formed in the raised piece 50,60 on the heat transfer part 70 of fin 35,36 is asymmetric raised piece 50a.In asymmetric raised piece 50a, edge, downside 56 is less relative to the gradient in cardinal margin portion 54 than upper edge part 55 relative to the gradient in cardinal margin portion 54.Therefore, produced and also flowed at the condensed water that cut end 53 between of air by asymmetric raised piece 50a adjacent on direction on the surface of fin 35,36, be inhaled into due to capillarity in gap each other, elongated edge, downside 56.Therefore, according to the invention of this aspect, make except gravity can be utilized to flow into air by asymmetric raised piece 50a adjacent on direction cut condensation flow between end 53 downwards except, capillarity can also be utilized to make condensation flow downwards, thus can reduce the condensation water quantity remained on heat transfer part 70 surface.

In invention in the above-mentioned 5th, the leeward end 73 of each heat transfer part 70 of fin 35,36 is provided with raised piece 60.Compare with the temperature difference of the air flowing through venting flow path 40 with the part be clipped between neighbouring flat tube 33, leeward end 73 is less with the temperature difference of the air flowing through venting flow path 40.On the other hand, in the invention in this, the leeward end 73 of heat transfer part 70 is provided with raised piece 60, promotes that leeward end 73 and air conduct heat each other.Therefore, according to the invention of this aspect, the leeward end 73 of heat transfer part 70 can be effectively utilized the heat exchange in heat transfer part 70 and air, the performance improving heat exchanger 30 can be sought.

In invention in the above-mentioned 6th, each heat transfer part 70 of fin 35,36 is provided with multiple swells 81 ~ 83.Therefore, the swells that the air stream in venting flow path 40 is often crossed in multiple swells 81 ~ 83 will produce disorder.Therefore, according to the invention of this aspect, can promote that the part being provided with swells 81 ~ 83 of heat transfer part 70 and air conduct heat each other.

In invention in the above-mentioned 7th, on each heat transfer part 70 of fin 35,36, the air be positioned near the swells 81 on the position of windward side is wider by the width in direction than the air of other swells 82,83 by the width in direction.On each heat transfer part 70 of the fin 35,36 of the invention of above-mentioned eighth aspect, the height heaving direction be positioned near other swells 82,83 of the aspect ratio heaving direction of the swells 81 on the position of windward side is low.

That is, in invention in the 7th and the invention of eighth aspect, on each heat transfer part 70 of fin 35,36, the position of the air the flowing through venting flow path 40 close windward side larger with the temperature difference of heat transfer part 70 is provided with facilitation effect of conducting heat than other swells 82,83 little swells 81.Therefore, according to the invention of these aspects, the frost amount in the part of the close windward side of each heat transfer part 70 being attached to fin 35,36 can be suppressed, can reliably make the frost amount in the part of the close windward side being attached to heat transfer part 70 reduce with the difference of the frost amount be attached in the part of its leeward side.

In invention in the above-mentioned 11, be arranged on the lower end of the swells 81 ~ 83 on each heat transfer part 70 of fin 35,36, be just located below the closer to leeward side tilt.Therefore, to produce on the surface of heat transfer part 70 and the condensed water flowing to below from swells 81 ~ 83 is inhaled into the shorter leeward side of distance from flat tube 33 to the lower end of swells 81 ~ 83 gradually due to capillarity.Therefore, according to the invention of this aspect, can promote that the condensed water produced on heat transfer part 70 surface alee moves side, can reduce the condensation water quantity remained on heat exchanger 30.

Accompanying drawing explanation

Fig. 1 is the refrigerant loop figure that display comprises the schematic configuration of the air conditioner of the heat exchanger of the first embodiment.

Fig. 2 is the three-dimensional sketch map of the heat exchanger of the first embodiment.

Fig. 3 is the partial sectional view in the front of the heat exchanger of display first embodiment.

Fig. 4 be a part for A-A section in display Fig. 3, the sectional view of heat exchanger.

Fig. 5 is the figure of the major part of the fin of the heat exchanger of display first embodiment, and (A) is the front view of fin, and (B) is the sectional view of the B-B section of display (A).

Fig. 6 is the sectional view of the fin be arranged on the heat exchanger of the first embodiment, and (A) shows the C-C section in Fig. 5, and (B) shows the D-D section in Fig. 5, and (C) shows the E-E section in Fig. 5.

Fig. 7 is the figure that display is arranged on the heat transfer part of the multiple fins in the heat exchanger of the first embodiment, is the sectional view corresponding to Fig. 5 (B).

Fig. 8 is the fin sectional view of the F-F section in display Fig. 5.

Fig. 9 is the three-dimensional sketch map of the heat exchanger of the second embodiment.

Figure 10 is the partial sectional view in the front of the heat exchanger of display second embodiment.

Figure 11 be a part for the G-G section of display Figure 10, the sectional view of heat exchanger.

Figure 12 is the three-dimensional sketch map of the fin be arranged in the heat exchanger of the second embodiment.

Figure 13 is the sectional view corresponding to Fig. 4 of the heat exchanger of the 3rd embodiment.

Figure 14 is the figure of the major part of the fin of the heat exchanger of display the 3rd embodiment, and (A) is the front view of fin, and (B) is the sectional view of the H-H section of display (A).

Figure 15 is the fin front view that the first variation of other embodiments is applied to the example in the fin of the first embodiment by display, is the figure corresponding to Fig. 4.

Figure 16 is the fin front view that the second variation of other embodiments is applied to the example in the fin of the first embodiment by display, is the figure corresponding to Fig. 4.

Figure 17 is the sectional view corresponding to (B) of Fig. 5 of the fin of other embodiments, (A) the 3rd variation is applied to the example in the fin of the first embodiment by display, and the 4th variation is applied to the example in the fin of the first embodiment by (B) display.

Detailed description of the invention

Below, with reference to accompanying drawing, embodiments of the present invention are described in detail.

(the first embodiment of invention)

First embodiment of the present invention is described.The heat exchanger 30 of the first embodiment forms the outdoor heat converter 23 of air conditioner 10 described later.

-air conditioner-

Be described with reference to the air conditioner 10 of Fig. 1 to the heat exchanger 30 comprising present embodiment.

The structure > of < air conditioner

Air conditioner 10 comprises outdoor unit 11 and indoor units 12.Outdoor unit 11 and indoor units 12 are interconnected by liquid side connecting pipe 13 gentle side connecting pipe 14.In air conditioner 10, form refrigerant loop 20 by outdoor unit 11, indoor units 12, liquid side connecting pipe 13, gas side connecting pipe 14.

Compressor 21, four-way change-over valve 22, outdoor heat converter 23, expansion valve 24 and indoor heat converter 25 is provided with in refrigerant loop 20.Compressor 21, four-way change-over valve 22, outdoor heat converter 23 and expansion valve 24 are accommodated in outdoor unit 11.The outdoor fan 15 for outdoor air being fed to outdoor heat converter 23 is provided with in outdoor unit 11.On the other hand, indoor heat converter 25 is accommodated in indoor units 12.The indoor fan 16 for room air being fed to indoor heat converter 25 is provided with in indoor units 12.

Refrigerant loop 20 is the loops being filled with cold-producing medium.In refrigerant loop 20, the ejection side of compressor 21 is connected with the first valve port of four-way change-over valve 22, and the suction side of this compressor 21 is connected with the second valve port of four-way change-over valve 22.In refrigerant loop 20, be disposed with outdoor heat converter 23, expansion valve 24 and indoor heat converter 25 from the 3rd valve port of four-way change-over valve 22 towards the 4th valve port.

Compressor 21 is totally-enclosed type scroll compressor or totally-enclosed type rotary compressor.The state of four-way change-over valve 22 switches between the first state (using the state shown in dotted line in FIG) and the second state (using the state shown in solid line in FIG), this first state is that the first valve port communicates with the 3rd valve port and the state that communicates with the 4th valve port of the second valve port, and this second state is that the first valve port communicates with the 4th valve port and the state that communicates with the 3rd valve port of the second valve port.Expansion valve 24 is so-called electric expansion valves.

Outdoor heat converter 23 makes outdoor air and cold-producing medium carry out heat exchange.Outdoor heat converter 23 is made up of the heat exchanger 30 of present embodiment.On the other hand, indoor heat converter 25 makes room air and cold-producing medium carry out heat exchange.Indoor heat converter 25 is made up of the so-called tubes provided with cross ribs plate heat exchanger comprised for the heat-transfer pipe of pipe.

< cooling operation >

Air conditioner 10 carries out cooling operation.In cooling operation, four-way change-over valve 22 is set as the first state.Further, in cooling operation, outdoor fan 15 and indoor fan 16 are operated.

Kind of refrigeration cycle is carried out in refrigerant loop 20.Specifically, the cold-producing medium of ejection from compressor 21 passes through in four-way change-over valve 22 inflow outdoor heat exchanger 23, the condensation to outdoor air heat release.The cold-producing medium flowed out in heat exchanger 23 outdoor, by expanding during expansion valve 24, then in inflow indoor heat exchanger 25, absorbing heat in air indoor and evaporating.The cold-producing medium flowed out in heat exchanger 25 is indoor inhaled in compressor 21 after by four-way change-over valve 22 and is compressed.Indoor units 12 by indoor heat converter 25 cooled air feed to indoor.

< heats running >

Air conditioner 10 carries out heating running.Heating in running, four-way change-over valve 22 is set as the second state.Further, heating in running, outdoor fan 15 and indoor fan 16 are operated.

Kind of refrigeration cycle is carried out in refrigerant loop 20.Specifically, the cold-producing medium of ejection from compressor 21 passes through in four-way change-over valve 22 inflow indoor heat exchanger 25, the condensation to room air heat release.The cold-producing medium flowed out in heat exchanger 25 indoor, by expanding during expansion valve 24, then in inflow outdoor heat exchanger 23, absorbing heat in air outdoor and evaporating.The cold-producing medium flowed out in heat exchanger 23 is outdoor inhaled in compressor 21 after by four-way change-over valve 22 and is compressed.Indoor units 12 will be fed to indoor by the air heated in indoor heat converter 25.

< defrosting action >

As mentioned above, heating in running, outdoor heat converter 23 plays the effect of evaporimeter.Under the operating condition that outside air temperature is lower, the refrigerant evaporating temperature in outdoor heat converter 23 is sometimes lower than 0 DEG C, and in this case, the moisture in outdoor air is understood frosting and is attached on outdoor heat converter 23.Therefore, the duration heating running such as often reaches setting (such as several tens minutes), and air conditioner 10 will carry out defrosting action.

When starting to carry out defrosting action, four-way change-over valve 22 switches to the first state from the second state, and outdoor fan 15 and indoor fan 16 stop.In refrigerant loop 20 in defrosting action, from compressor 21, the high temperature refrigerant of ejection is supplied to outdoor heat converter 23.In outdoor heat converter 23, be attached to cooled dose of the frost heating on the surface of this outdoor heat converter 23 and melted.In outdoor heat converter 23, the cold-producing medium of heat release, successively by expansion valve 24 and indoor heat converter 25, is then inhaled in compressor 21 and is compressed.After defrosting release, again carry out heating running.That is, four-way change-over valve 22 switches to the second state from the first state, and outdoor fan 15 and indoor fan 16 are started running again.

-heat exchanger of the first embodiment-

Suitably with reference to Fig. 2 ~ Fig. 8, the heat exchanger 30 of the present embodiment of the outdoor heat converter 23 of formation air conditioner 10 is described.

The overall structure > of < heat exchanger

As shown in Figures 2 and 3, the heat exchanger 30 of present embodiment comprises a first total collection pipe 31, the second total collection pipe 32, many flat tubes 33 and many fins 36.First total collection pipe 31, second total collection pipe 32, flat tube 33 and fin 36 are aluminium alloy part, are engaged with each other together by soldering.

First total collection pipe 31 and the second total collection pipe 32 are all formed as elongated and the hollow cylindrical that is closed of two ends.In figure 3, the left end of heat exchanger 30 is provided with the first total collection pipe 31, the right-hand member of heat exchanger 30 is provided with the second total collection pipe 32, this first total collection pipe 31 and the second total collection pipe 32 are all that the form erect is arranged.That is, the first total collection pipe 31 and the second total collection pipe 32 axially arrange towards the form of above-below direction with respective.

As also shown in the diagram, the heat-transfer pipe of flat tube 33 to be its section shapes be flat elliptic or round rectangle.In heat exchanger 30, many flat tubes 33 are arranged with following form, that is: the bearing of trend of this flat tube 33 is towards left and right directions, and respective smooth side toward each other.Many flat tubes 33 are set to keep certain interval each other and arrange along the vertical direction.One end of each flat tube 33 is inserted in the first total collection pipe 31, and the other end of each flat tube 33 is inserted in the second total collection pipe 32.

Fin 36 is plate-shaped fins, the bearing of trend of flat tube 33 is kept certain interval each other and arranges.That is, fin 36 is set to orthogonal with the bearing of trend of flat tube 33 in fact.In each fin 36, the part between flat tube 33 adjacent in the vertical direction forms heat transfer part 70, and details are aftermentioned.

As shown in Figure 3, in heat exchanger 30, the space between flat tube 33 adjacent is in the vertical direction divided into multiple venting flow path 40 by the heat transfer part 70 of fin 36.The cold-producing medium that heat exchanger 30 makes flowing in the fluid passage 34 of flat tube 33 carries out heat exchange with the air flowed in venting flow path 40.

As mentioned above, heat exchanger 30 comprises many flat tubes 33 and multiple fin 36, many these flat tubes 33 arrange along the vertical direction, and the smooth side of this flat tube 33 toward each other, this fin 36 multiple has the tabular heat transfer part 70 extending to another flat tube from the flat tube in adjacent flat tube 33.Between adjacent flat tube 33, multiple heat transfer part 70 arranges along the bearing of trend of flat tube 33.In this heat exchanger 30, the air of flowing between adjacent heat transfer part 70 carries out heat exchange with the fluid flowed in each flat tube 33.

The structure > of < fin

As shown in Figure 4, fin 36 is the lengthwise plate-shaped fins made by carrying out punch process to metallic plate.The thickness of fin 36 is roughly about 0.1mm.

Fin 36 to be formed in elongated shape and from the leading edge 38 of fin 36 along multiple notch 45 that the width (namely air passes through direction) of fin 36 extends.Fin 36 keeps certain gap-forming along the long side direction (above-below direction) of fin 36 and has many notch 45.Notch 45 is used to the otch inserted by flat tube 33 in this notch 45.The part of the close leeward side of notch 45 forms pipe insertion section 46.The width of the above-below direction of pipe insertion section 46 is equal with the thickness of flat tube 33 in fact, and the length of pipe insertion section 46 is equal with the width of flat tube 33 in fact.

Flat tube 33 is inserted in the pipe insertion section 46 of fin 36, and is engaged by the circumference of soldering with pipe insertion section 46.That is, a part for flat tube 33 cutout portion 45 and the circumference of pipe insertion section 46 clip.

In fin 36, the part between notch 45 adjacent in the vertical direction forms heat transfer part 70.That is, each fin 36 comprises and clips the adjacent multiple heat transfer parts 70 of flat tube 33 in the vertical direction.In the heat exchanger 30 of present embodiment, the heat transfer part 70 of fin 36 is arranged between the flat tube 33 that arranges in the vertical direction.

Each heat transfer part 70 of fin 36 comprises pars intermedia 71, windward end 72 and leeward end 73.On each heat transfer part 70, the part that overlaps with neighbouring flat tube 33 (that is, to be positioned at directly over neighbouring flat tube 33 or immediately below part) becomes pars intermedia 71.On each heat transfer part 70, be positioned at than the part of pars intermedia 71 also on the position of windward side (namely, be projected into than flat tube 33 also near the part of the position of windward side) become windward end 72, be positioned at and become leeward end 73 than the part of pars intermedia 71 also on the position of leeward side (that is, being projected into than flat tube 33 also near the part of the position of leeward side).

On fin 36, the leeward end 73 of neighbouring heat transfer part 70 is together connected to each other by web portion 75.Fin 36 is formed diversion rib 49.Diversion rib 49 is the elongate grooves along downward-extension on the trailing edge of fin 36.Diversion rib 49 is formed into the lower end of this fin 36 from the upper end of fin 36.

As shown in Figure 5, each heat transfer part 70 of fin 36 is formed with multiple swells 81 ~ 83 and multiple raised piece 50,60.On each heat transfer part 70, the position near windward side is provided with swells 81 ~ 83, the position near leeward side is provided with raised piece 50,60.That is, on each heat transfer part 70, only in the part near leeward side, be provided with raised piece 50,60, also in the part of windward side, be provided with swells 81 ~ 83 than all raised piece 50,60.Should illustrate, the quantity of swells 81 ~ 83 shown below and a quantity all only example of raised piece 50,60.

On each heat transfer part 70 of fin 36, the part from windward end 72 to the region of the close windward side of pars intermedia 71 is provided with three swells 81 ~ 83.Three swells 81 ~ 83 along air by direction (namely from the leading edge 38 of fin 36 towards the direction of trailing edge 39) arrangement.Each swells 81 ~ 83 forms by making heat transfer part 70 heave to venting flow path 40, is formed as mountain shape.The details of each swells 81 ~ 83 are aftermentioned.

On each heat transfer part 70 of fin 36, the part in the close leeward side of pars intermedia 71 and leeward end 73 are respectively arranged with multiple raised piece 50,60 extended along the vertical direction.On each heat transfer part 70, multiple raised piece 50,60 is arranged along air by direction.The details of raised piece 50,60 are aftermentioned.

Fin 36 is formed the protuberance (tab) 48 for keeping the interval between this fin 36 and adjacent fin 36.As shown in Figure 5 (B), protuberance 48 is the rectangular particles formed by cutting fin 36.As shown in Figure 7, protuberance 48 contacts by making the jag of this protuberance 48 and adjacent fin 36 thus keeps fin 36 interval each other.As shown in Fig. 5 (A), the upper edge part and edge, downside of the windward end 72 of heat transfer part 70 are respectively arranged with a protuberance 48.Further, each web portion 75 is also respectively arranged with a protuberance 48.

The facilities of < swells and shape >

The facilities of the swells 81 ~ 83 be formed on fin 36 and shape are described in detail.Should illustrate, " right side " described herein and " left side " refer to direction when seeing fin 36 from windward side (i.e. side before heat exchanger 30).

As shown in Figure 5, each heat transfer part 70 of fin 36 is provided with the first swells 81, second swells 82 and the 3rd swells 83.Each swells 81 ~ 83 makes the heat transfer part 70 of fin 36 produce plastic deformation by punch process etc. and is formed, and each swells 81 ~ 83 is heaved to the right side of heat transfer part 70 (with reference to Fig. 6 (A)).Should illustrate, heat transfer part 70 shown here heave a direction only example.That is, each swells 81 ~ 83 also can be heaved to the left side of heat transfer part 70.

Each swells 81 ~ 83 is extended to the air in venting flow path 40 by the direction that direction is crossing.Specifically, each swells 81 ~ 83 is formed as crest line 81a, 82a, 83a mountain shape parallel with the leading edge 38 of fin 36 in fact.That is, crest line 81a, 82a, 83a of each swells 81 ~ 83 are crossing by direction with air.In each swells 81 ~ 83, from the front end (i.e. the end of windward side) of this swells 81 ~ 83 until the sloping portion of crest line 81a, 82a, 83a and from the rear end (i.e. the end of leeward side) of this swells 81 ~ 83 until the sloping portion of crest line 81a, 82a, 83a becomes inclined plane part 81b, 82b, 83b respectively.In each swells 81 ~ 83, from upper end 81d, 82d, 83d of this swells 81 ~ 83 until the part of the upper end of inclined plane part 81b, 82b, 83b and from lower end 81e, 82e, 83e of this swells 81 ~ 83 until the part of the lower end of inclined plane part 81b, 82b, 83b becomes side surface part 81c, 82c, 83c respectively.

On each heat transfer part 70 of fin 36, the first swells 81, second swells 82 and the 3rd swells 83 are arranged in order along air by direction (namely from the leading edge 38 of fin 36 towards the direction of trailing edge 39).On each heat transfer part 70, three swells 81 ~ 83 be arranged on from windward end 72 until pars intermedia 71 close windward side part position.Specifically, the front end of the first swells 81 is near the leading edge 38 of fin 36.The rear end of the first swells 81 is connected with the front end of the second swells 82, and the rear end of the second swells 82 is connected with the front end of the 3rd swells 83.The ratio air that the rear end of the 3rd swells 83 is positioned at heat transfer part 70 by the central authorities in direction also on the position of leeward side.That is, count the distance L1 the rear end of the 3rd swells 83 from the leading edge 38 of fin 36, be greater than the half (L1 > L/2) counting the distance L rear end 39 from front end 38 of fin 36.

As shown in Fig. 5 (A), the width W 3 that the air of the first swells 81 passes through direction by the air of width W 1 to the second swells 82 in direction by the width W 2 in direction and the air of the 3rd swells 83 is all long.The width W 2 of the second swells 82 is equal with the width W 3 of the 3rd swells 83.That is, the pass between the width of each swells 81 ~ 83 is: W1 > W2=W3.On the other hand, as shown in Figure 5 (B), the height H 2 heaving direction of height H 1 to the second swells 82 heaving direction of the first swells 81 is low, and the height H 3 heaving direction of height H 2 to the three swells 83 heaving direction of the second swells 82 is low (H1 < H2 < H3).

The upper end 81d of the first swells 81 makes the leeward side of this upper end 81d tilt near top.On the other hand, the upper end 82d of the second swells 82 and upper end 83d of the 3rd swells 83 is orthogonal with the leading edge 38 of fin 36 in fact.On each heat transfer part 70, count the distance that the distance the upper end 83d of the 3rd swells 83 counts than the upper end of this heat transfer part 70 the upper end 82d of the second swells 82 from the upper end of this heat transfer part 70 short.

Lower end 81e, 82e, 83e of each swells 81 ~ 83 make the leeward side of this lower end 81e, 82e, 83e tilt near below.Lower end 81e, 82e, 83e of three swells 81 ~ 83 come on the straight line that tilts the closer to the position of leeward side the closer to below.Therefore, on each heat transfer part 70, compared with distance D1 the weather side end counting the lower end 81e of the first swells 81 with the lower end from this heat transfer part 70, the distance D2 counted from the lower end of this heat transfer part 70 the downwind side end of the lower end 83e of the 3rd swells 83 is shorter.Further, on each heat transfer part 70, the distance counted from the lower end of this heat transfer part 70 till lower end 81e, 82e, 83e of swells 81 ~ 83 shortens gradually with near leeward side.

The facilities of < raised piece and shape >

The facilities of the raised piece 50,60 be formed on fin 36 and shape are described in detail.Should illustrate, " right side " described herein and " left side " refer to direction when seeing fin 36 from windward side (i.e. side before heat exchanger 30).

As shown in Figure 5, each heat transfer part 70 of fin 36 is disposed with multiple raised piece 50,60 along air by direction.On heat transfer part 70, the one group of raised piece be arranged on pars intermedia 71 forms weather side raised piece 50, and the one group of raised piece be arranged on leeward end 73 forms downwind side raised piece 60.

Part torsion between adjacent joint-cutting by forming many slit-shaped joint-cuttings on heat transfer part 70, and makes this part produce plastic deformation and is formed by each raised piece 50,60.The long side direction parallel with the leading edge 38 of heat transfer part 70 in fact (that is, towards above-below direction) of each raised piece 50,60.That is, the long side direction of each raised piece 50,60 is by crossing direction, direction with air.The length of each raised piece 50,60 is equal to each other.

On each heat transfer part 70, count the distance D2 that the distance till the lower end of each raised piece 50,60 counts with the lower end from this heat transfer part 70 in fact the downwind side end of the lower end 83e of the 3rd swells 83 from the lower end of this heat transfer part 70 equal.On each heat transfer part 70, count the distance that the distance till the upper end of each raised piece 50,60 counts with the upper end from this heat transfer part 70 in fact the upper end 83d of the 3rd swells 83 from the upper end of this heat transfer part 70 equal.

As shown in Figure 5 (B), each raised piece 50,60 tilts relative to the flat around it.Weather side raised piece 50 and downwind side raised piece 60 tilt towards direction contrary each other.The end 53 that cuts of the windward side of weather side raised piece 50 is heaved to the left, and the end 53 that cuts of the leeward side of weather side raised piece 50 is heaved to the right.That is, weather side raised piece 50 leeward side cut end 53 to outstanding with the direction of heaving direction identical of the 3rd swells 83.On the other hand, the end 63 that cuts of the windward side of downwind side raised piece 60 is heaved to the right, and the end 63 that cuts of the leeward side of downwind side raised piece 60 is heaved to the left.

As shown in Fig. 6 (B) and Fig. 6 (C), weather side raised piece 50 and downwind side raised piece 60 cut end 53,63 by cardinal margin portion 54,64, upper edge part 55,65 and edge, downside 56,66 form.The bearing of trend in cardinal margin portion 54,64 is parallel with the bearing of trend of the leading edge 38 of heat transfer part 70 in fact.Upper edge part 55,65 is the parts of the upper end extending to raised piece 50,60 from the upper end in cardinal margin portion 54,64, and upper edge part 55,65 tilts relative to cardinal margin portion 54,64.Edge 56,66, downside is the parts of the lower end extending to raised piece 50,60 from the lower end in cardinal margin portion 54,64, and edge, downside 56,66 tilts relative to cardinal margin portion 54,64.

As shown in Fig. 6 (B), be in the wind in side raised piece 50, upper edge part 55 is θ 1 relative to the inclination angle in cardinal margin portion 54, and edge, downside 56 is θ 2 relative to the inclination angle in cardinal margin portion 54.As shown in Fig. 5 (A), be positioned on a part of weather side raised piece 50a on the position of windward side, the tiltangleθ 2 of edge, downside 56 is less than the tiltangleθ 1 of upper edge part 55 (θ 2 < θ 1).Therefore, on this weather side raised piece 50a, edge, downside 56 is longer than upper edge part 55.This weather side raised piece 50a is the shape cutting end 53 is upper and lower asymmetrical asymmetric raised piece.On the other hand, be positioned on a part of weather side raised piece 50b on the position of leeward side, the tiltangleθ 2 of edge, downside 56 is equal with the tiltangleθ 1 of upper edge part 55.This weather side raised piece 50b is the shape cutting end 53 is laterally zygomorphic symmetric form raised piece.

As shown in Fig. 6 (C), in downwind side raised piece 60, upper edge part 65 is θ 3 relative to the inclination angle in cardinal margin portion 64, and edge, downside 66 is θ 4 relative to the inclination angle in cardinal margin portion 64.As shown in Fig. 5 (A), in all downwind side raised piece 60, the tiltangleθ 4 of edge, downside 66 is all equal with the tiltangleθ 3 of upper edge part 65.This downwind side raised piece 60 is the shapes cutting end 63 is laterally zygomorphic symmetric form raised piece.

-the air mobility status in heat exchanger-

Be described with reference to the mobility status of Fig. 7 to the air by heat exchanger 30.

In heat exchanger 30, venting flow path 40 is formed between heat transfer part 70 adjacent on the bearing of trend of flat tube 33, and air flows through this venting flow path 40.On the other hand, the heat transfer part 70 of each fin 36 is formed with the swells 81 ~ 83 heaved to certain direction (right side time in the present embodiment, viewed from leading edge 38 side of fin 36).Therefore, in venting flow path 40 towards the part of the swells 81 ~ 83 of heat transfer part 70 in the shape of crawling along swells 81 ~ 83.

From the air in the leading edge 38 side flow ventilation stream 40 of fin 36, collision swells 81 ~ 83, while flowed through the part of crawling in venting flow path 40.Therefore, the empty airflow collision swells 81 ~ 83 in venting flow path 40 and change its flow direction, produces disorder thus.Consequently, compared with being the situation of the flat board of no concave-convex with heat transfer part 70, the heat transfer between the air of flowing in venting flow path 40 and heat transfer part 70 is promoted.

In venting flow path 40, the air collides weather side raised piece 50 that swells 81 ~ 83 limit is flow through is crossed on limit.Now, the air that the crest line 83a having crossed the 3rd swells 83 flows through flows along the inclined plane part 83b of leeward side, collides weather side raised piece 50 afterwards.The leeward side of weather side raised piece 50 cut end 53 to the 3rd swells 83 to heave direction outstanding.Therefore, the inclined plane part 83b along the leeward side of the 3rd swells 83 flows through the air collides weather side raised piece 50 come, and in such event, the flow direction of this air changes due to weather side raised piece 50.Thus, the air miscarriage in venting flow path 40 is raw disorderly, and the heat transfer between air and heat transfer part 70 is promoted.

As mentioned above, raised piece 50,60 is formed by cutting heat transfer part 70.Therefore, in heat exchanger 30, clip the adjacent venting flow path of heat transfer part 70 40 exchange of air each other, make the air stream in venting flow path 40 greatly produce disorder.Consequently, with heat transfer part 70 be the flat board of no concave-convex situation and on heat transfer part 70, be only formed with swells situation compared with, the heat transfer flowed through between the air of venting flow path 40 and heat transfer part 70 is promoted.

-frost on fin and the state of condensed water-

As mentioned above, the heat exchanger 30 of present embodiment forms the outdoor heat converter 23 of air conditioner 10.Air conditioner 10 carries out heating running, and the refrigerant evaporating temperature in outdoor heat converter 23 is lower than under the operating condition of 0 DEG C, and the moisture meeting frosting in outdoor air is also attached on outdoor heat converter 23.Therefore, air conditioner 10 carries out the defrosting action for making the frost thawing be attached on outdoor heat converter 23.In defrosting action, frost melts thus produces condensed water.

< frost is attached to the process > on fin

The process that frost is attached on the heat exchanger 30 forming outdoor heat converter 23 is described.Air in the venting flow path 40 of inflow heat exchanger 30 carries out heat exchange via the heat transfer part 70 of fin 36 with the cold-producing medium flowed in the fluid passage 34 of flat tube 33.In the surface temperature of heat transfer part 70 lower than under the state of 0 DEG C, the moisture in air can frosting and being attached on the surface of heat transfer part 70.

In general, and not cut heat transfer part 70 but the swells 81 ~ 83 only allowing heat transfer part 70 heave makes air miscarry compared with raw disorderly effect, make air raw disorderly effect of miscarrying larger by the raised piece 50,60 cutting heat transfer part 70.Therefore, under normal conditions, the heat transfer facilitation effect of raised piece 50,60 is also large than the heat transfer facilitation effect of swells 81 ~ 83.

On the other hand, on each heat transfer part 70 of fin 36, the part of leeward side is formed the raised piece 50,60 that heat transfer facilitation effect is higher, in the part of windward side, is also being formed with the lower swells 81 ~ 83 of heat transfer facilitation effect than raised piece 50,60.Therefore, compared with being formed in the situation on whole heat transfer part 70 with raised piece, the frost amount be attached in the part of the close windward side of heat transfer part 70 reduces, and the frost amount be attached in the part of the close leeward side of heat transfer part 70 increases.Therefore, on each heat transfer part 70 of fin 36, the frost amount be attached in the part of windward side reduces with the difference of the frost amount be attached in the part of leeward side.

In the surface temperature of heat transfer part 70 lower than under the state of 0 DEG C, the frosting being attached on heat transfer part 70 gradually of the moisture in the air of flowing in venting flow path 40.Therefore, the absolute humidity flowing through the air of venting flow path 40 declines gradually with near leeward side.The absolute humidity reaching the air of the higher raised piece 50,60 of heat transfer facilitation effect has become lower.Therefore, on each heat transfer part 70 of fin 36, the frost amount be attached in the part being provided with raised piece 50,60 can not reach volume.

As mentioned above, the venting flow path 40 formed by the heat transfer part 70 being provided with swells 81 ~ 83 is in the shape of crawling along swells 81 ~ 83.When the height heaving direction of swells is equal, the air of swells is wider by the width in direction, and the air change in the flowing direction along swells flowing is fewer.When the air of swells is equal by the width in direction, the height heaving direction of swells is lower, and the air change in the flowing direction along swells flowing is fewer.If reduce along the air change in the flowing direction of swells flowing, the heat transfer facilitation effect that swells is brought just reduces.On the other hand, in venting flow path 40, the temperature difference of air and the heat transfer part 70 of flowing is maximum in the porch of venting flow path 40, and reduces gradually with close leeward side.

On each heat transfer part 70 of present embodiment, the width W 2 of width W 1 to the second swells 82 of the first swells 81 and the width W 3 of the 3rd swells 83 all wide.On each heat transfer part 70, the height H 2 of height H 1 to the second swells 82 of the first swells 81 and the height H 3 of the 3rd swells 83 all low.That is, on each heat transfer part 70 of fin 36, the position of the air of flowing in venting flow path 40 and the larger close windward side of the temperature difference of heat transfer part 70 is provided with the first less swells 81 of facilitation effect of conducting heat.Therefore, on each heat transfer part 70 of fin 36, the frost amount be attached in the part of windward side reliably can be suppressed.

As mentioned above, in the heat exchanger 30 of present embodiment, frost is not only attached in the part of close windward side of fin 36, is also attached in the part of close leeward side of this fin 36.Therefore, when being necessary to carry out defrosting action, it is more than the frost amount on the heat exchanger being attached to existing, raised piece and being arranged on whole heat transfer part to be attached to frost amount on the heat exchanger 30 of present embodiment.Therefore, compared with there is the air conditioner of the outdoor heat converter be made up of existing heat exchanger, in the air conditioner 10 with the outdoor heat converter 23 be made up of the heat exchanger 30 of present embodiment, from defrosting release time to defrosting action next time time the time interval increase, consequently heat running duration increase.

Frost in < defrosting action and the state > of condensed water

The state of the frost in the heat exchanger 30 in the defrosting action of air conditioner 10 and condensed water is described.In defrosting action, the frost be attached on heat exchanger 30 melts and becomes condensed water, and the condensed water produced is discharged gradually in heat exchanger 30.

On each heat transfer part 70 of fin 36, if the frost be attached on heat transfer part 70 melts, the condensed water produced just flows to below.Now, the frost be attached on the windward end 72 of heat transfer part 70 becomes condensed water and flows to below from windward end 72.On the other hand, the frost be attached on the pars intermedia 71 of heat transfer part 70 becomes condensed water, then accumulates in the flattened side of flat tube 33.

On each heat transfer part 70 of fin 36, lower end 81e, 82e, 83e of each swells 81 ~ 83 tilt, and the distance counted from the lower end of heat transfer part 70 till lower end 81e, 82e, 83e of swells 81 ~ 83 shortens gradually with near leeward side.Therefore, on each heat transfer part 70, the distance counted from the flat tube 33 of the below being positioned at this heat transfer part 70 till lower end 81e, 82e, 83e of swells 81 ~ 83 narrows side alee gradually.Therefore, to be attracted to gradually due to capillarity from the condensed water accumulated in after swells 81 ~ 83 flows down flat tube 33 and to count the shorter leeward side of distance till lower end 81e, 82e, 83e of swells 81 ~ 83 from flat tube 33.That is, although outdoor fan 15 stops in defrosting action always, and the upper surface of flat tube 33 is roughly horizontal plane, condensed water still alee side move gradually.

As mentioned above, in the heat exchanger 30 of present embodiment, the condensed water produced in defrosting action is reliably discharged to leeward side.Therefore, when defrosting release, the condensation water quantity remained on heat transfer part 70 surface reduces.If condensate retention is on the surface of heat transfer part 70, freeze after the condensed water stayed will restart heating running, the time to when being necessary again to carry out defrosting action shortens.Therefore, compared with there is the air conditioner of the outdoor heat converter be made up of existing heat exchanger, in the air conditioner 10 with the outdoor heat converter 23 be made up of the heat exchanger 30 of present embodiment, from defrosting release time to defrosting action next time time institute's elapsed time (heating the duration of running) increase.

As mentioned above, in the heat exchanger 30 of present embodiment, a part of weather side raised piece 50a is asymmetric raised piece.That is, on this weather side raised piece 50a, the tiltangleθ 2 of edge, downside 56 is less than the tiltangleθ 1 of the upper edge part 55 of this weather side raised piece 50a (with reference to Fig. 6 (B)).Therefore, as shown in Figure 8, between air is by weather side raised piece 50a adjacent on direction, the gap be formed in compared with the gap be formed between respective upper edge part 55 between respective edge, downside 56 is more elongated shape.

Generally speaking, larger capillary force action is in being present on the liquid in narrower gap.Further, narrower gap, the capillary force acted on liquid is larger.On the other hand, flowed under the state that cut end 53 between of air by weather side raised piece 50a adjacent on direction at condensed water as shown in Figure 8, and compared with interval each other, the cardinal margin portion 54 of the upper-end contact of this condensed water and the interval each other, edge, downside 56 of the lower end in contact of this condensed water is narrower.Therefore, act on condensed water, direction capillary force is down stronger than the capillary force be directed upwardly, thus condensed water is inhaled into side, edge 56, downside (namely on the downside of).

Type is that the edge, downside 56 of the weather side raised piece 50a of asymmetric raised piece is longer.Therefore, between air is by weather side raised piece 50a adjacent on direction, cuts narrower region, end 53 interval each other and become large.Consequently, act on condensed water, that direction capillary force is down stronger than the capillary force be directed upwardly region and become large, the possibility of therefore condensed water movement downwards due to capillarity uprises.

As mentioned above, flowed into and be inhaled into gradually in elongated and narrow gap each other, edge 56, downside due to capillarity at the condensed water between end 53 of cutting of air by weather side raised piece 50a adjacent on direction.That is, this condensed water not only flow under gravity below, but also due to capillarity also flow to below.Therefore, the condensed water produced in defrosting action near the side raised piece 50a that is in the wind is discharged to rapidly below, is difficult to residue in air cutting between end 53 by weather side raised piece 50a adjacent on direction.

On each heat transfer part 70 of fin 36, compared with the white adhesion amount of the downwind side raised piece 60 on the leeward end 73 far away with being arranged on distance flat tube 33, the white adhesion amount being arranged on the weather side raised piece 50 on the nearer pars intermedia 71 of distance flat tube 33 is more.Be in the wind in side raised piece 50, be positioned at leeward side weather side raised piece 50b white adhesion amount compared with to be positioned at the white adhesion amount of the weather side raised piece 50a of windward side more.Therefore, the condensation water quantity produced in defrosting action the closer to the raised piece of windward side in weather side raised piece 50 is more.

On the other hand, on each heat transfer part 70 of the fin 36 of present embodiment, a part of weather side raised piece 50a be positioned on the position of windward side is asymmetric raised piece.That is, on each heat transfer part 70, the weather side raised piece 50a of the close windward side that the condensation water quantity produced in defrosting action is more is the asymmetric raised piece that condensed water is difficult to remain.Therefore, by making a part of weather side raised piece 50a be asymmetric raised piece, also can reduce and residuing in condensation water quantity on heat transfer part 70 surface when defrosting release.

-effect of the first embodiment-

As mentioned above, heat exchanger 30 according to the present embodiment, heat in running at air conditioner 10, frost can not only be made to be attached in the part of close windward side of the heat transfer part 70 of fin 36, frost can also be made to be attached in the part of close leeward side of this heat transfer part 70.Therefore, by being made up of the outdoor heat converter 23 of air conditioner 10 heat exchanger 30 of present embodiment, then the duration heating running can be made to increase.

Heat exchanger 30 according to the present embodiment, can reduce and residue in condensation water quantity on heat transfer part 70 surface when defrosting release.The condensed water residued on heat transfer part 70 surface freezes after can restart heating running.Therefore, if the condensed water remained on heat transfer part 70 surface reduces, the time to when being necessary again to carry out defrosting action just increases.Therefore, by being made up of the outdoor heat converter 23 of air conditioner 10 heat exchanger 30 of present embodiment, then the duration heating running can be made to increase.

As mentioned above, by being made up of the outdoor heat converter 23 of air conditioner 10 heat exchanger 30 of present embodiment, then the duration heating running can being made to increase, and then the time needed for defrosting action can be shortened.Therefore, by being made up of the outdoor heat converter 23 of air conditioner 10 heat exchanger 30 of present embodiment, then the time average (that is, the essence heating capacity of air conditioner 10) of the heating capacity of air conditioner 10 can be improved.

(the second embodiment of invention)

Second embodiment of the present invention is described.The heat exchanger 30 of the second embodiment outdoor heat converter 23 that form air conditioner 10 the same as the heat exchanger 30 of the first embodiment.Below, be suitably described with reference to the heat exchanger 30 of Fig. 9 ~ Figure 12 to present embodiment.

The overall structure > of < heat exchanger

As shown in Figure 9 and Figure 10, the heat exchanger 30 of present embodiment comprises a first total collection pipe 31, the second total collection pipe 32, many flat tubes 33 and many fins 35.First total collection pipe 31, second total collection pipe 32, flat tube 33 and fin 35 are aluminium alloy part, are engaged with each other together by soldering.

First total collection pipe 31, second total collection pipe 32 is identical with the heat exchanger 30 of the first embodiment with facilities with the structure of flat tube 33.That is, first total collection pipe 31 and the second total collection pipe 32 are all formed as the cylindrical shape of lengthwise, a total collection pipe in first total collection pipe 31 and the second total collection pipe 32 is arranged on the left end of heat exchanger 30, and another total collection pipe is arranged on the right-hand member of heat exchanger 30.On the other hand, flat tube 33 is heat-transfer pipes that section shape is flat, and flat tube 33 is arranged above and below with respective flattened side form in opposite directions and arranges.Multiple fluid passage 34 is formed in each flat tube 33.One end of each flat tube 33 be arranged above and below is inserted in the first total collection pipe 31, and the other end is inserted in the second total collection pipe 32.

Fin 35 is the corrugated fin of crawling up and down, is arranged between neighbouring flat tube 33.Fin 35 is formed multiple heat transfer part 70 and multiple middle plate portion 41, and details are aftermentioned.The middle plate portion 41 of each fin 35 is engaged with flat tube 33 by soldering.

As shown in Figure 10, in heat exchanger 30, the space between flat tube 33 adjacent is in the vertical direction divided into multiple venting flow path 40 by the heat transfer part 70 of fin 35.The cold-producing medium that heat exchanger 30 makes flowing in the fluid passage 34 of flat tube 33 carries out heat exchange with the air flowed in venting flow path 40.

As mentioned above, heat exchanger 30 comprises many flat tubes 33 and multiple fin 36, many these flat tubes 33 arrange along the vertical direction, and the smooth side of this flat tube 33 toward each other, this fin 35 multiple has the tabular heat transfer part 70 extending to another flat tube from the flat tube in adjacent flat tube 33.Between adjacent flat tube 33, multiple heat transfer part 70 arranges along the bearing of trend of flat tube 33.In this heat exchanger 30, the air of flowing between adjacent heat transfer part 70 carries out heat exchange with the fluid flowed in each flat tube 33.

The structure > of < fin

As shown in figure 12, fin 35 is the corrugated fin by being formed by sheet metal bent certain for width, in the shape of crawling up and down.Fin 35 is alternately formed with heat transfer part 70 and middle plate portion 41 along the bearing of trend of flat tube 33.That is, in fin 35, be provided with the multiple heat transfer parts 70 being arranged in and arranging between adjacent flat tube 33 and along the bearing of trend of flat tube 33.Further, fin 35 is formed with projecting plate portion 42.Should illustrate, eliminate the diagram of swells 81 ~ 83 described later and raised piece 50,60 in fig. 12.

Heat transfer part 70 is the plate portions extending to another flat tube from the flat tube in flat tube 33 adjacent in the vertical direction.In heat transfer part 70, the end of windward side becomes leading edge 38, and the end of leeward side becomes trailing edge 39.Middle plate portion 41 is the plate portions extended along the flattened side of flat tube 33, is connected or is connected with each lower end of heat transfer part 70 adjacent in the lateral direction with each upper end of heat transfer part 70 adjacent in the lateral direction.Heat transfer part 70 and middle plate portion 41 roughly at a right angle.

As shown in figure 11, each heat transfer part 70 of fin 35 comprises pars intermedia 71, windward end 72 and leeward end 73.On each heat transfer part 70, the part that overlaps with neighbouring flat tube 33 (that is, to be positioned at directly over neighbouring flat tube 33 or immediately below part) becomes pars intermedia 71.On each heat transfer part 70, be positioned at than the part of pars intermedia 71 also on the position of windward side (namely, be projected into than flat tube 33 also near the part of the position of windward side) become windward end 72, be positioned at and become leeward end 73 than the part of pars intermedia 71 also on the position of leeward side (that is, being projected into than flat tube 33 also near the part of the position of leeward side).

Each heat transfer part 70 is respectively arranged with two projecting plate portions 42.Projecting plate portion 42 is formed as the trapezoidal tabular be connected with leeward end 73.On each heat transfer part 70, the projecting plate portion 42 in two projecting plate portions 42 gives prominence to upward from the upper end of leeward end 73, and another projecting plate portion 42 gives prominence to downwards from the lower end of leeward end 73.In heat exchanger 30, the projecting plate portion 42 clipping the neighbouring fin of flat tube 33 35 contacts with each other.

As shown in figure 11, each heat transfer part 70 of fin 35 is provided with multiple swells 81 ~ 83 and multiple raised piece 50,60.The same with the fin 36 of the first embodiment, on each heat transfer part 70, the position near windward side is provided with swells 81 ~ 83, the position near leeward side is provided with raised piece 50,60.That is, on each heat transfer part 70, only in the part near leeward side, be provided with raised piece 50,60, and also in the part of windward side, be provided with swells 81 ~ 83 than all raised piece 50,60.

The facilities of < swells and shape >

The facilities of the swells 81 ~ 83 be formed on fin 35 and shape are described in detail.Should illustrate, " right side " described herein and " left side " refer to direction when seeing fin 35 from windward side (i.e. side before heat exchanger 30).

As shown in figure 11, the facilities of swells 81 ~ 83 on each heat transfer part 70 of fin 35 and the shape of each swells 81 ~ 83 identical with the fin 36 of the first embodiment.The quantity of swells 81 ~ 83 shown below and heave a direction only example, this is also the same with the first embodiment.

Specifically, each swells 81 ~ 83 is formed, in the mountain shape that crest line 81a, 82a, 83a of each swells 81 ~ 83 are parallel with the leading edge 38 of fin 35 in fact by making heat transfer part 70 heave to venting flow path 40.Each swells 81 ~ 83 is heaved to the right side of heat transfer part 70.

On each heat transfer part 70, three swells 81 ~ 83 along air by direction (namely from the leading edge 38 of fin 35 towards the direction of trailing edge 39) arrangement.On each heat transfer part 70, three swells 81 ~ 83 be arranged on from windward end 72 until pars intermedia 71 close windward side part position.

On each heat transfer part 70, the air of the first swells 81 is the widest in three swells 81 ~ 83 by the width in direction.The air of the second swells 82 and the 3rd swells 83 is equal to each other by the width in direction.On each heat transfer part 70, the height heaving direction of the first swells 81 is minimum in three swells 81 ~ 83.The height heaving direction of the aspect ratio heaving direction the 3rd swells 83 of the second swells 82 is low.

Lower end 81e, 82e, 83e of each swells 81 ~ 83 make the position of the leeward side of this lower end 81e, 82e, 83e tilt near below.On each heat transfer part 70, the distance counted from the lower end of this heat transfer part 70 till lower end 81e, 82e, 83e of swells 81 ~ 83 shortens gradually with near leeward side.

The facilities of < raised piece and shape >

The facilities of the raised piece 50,60 be formed on fin 35 and shape are described in detail.Should illustrate, " right side " described herein and " left side " refer to direction when seeing fin 35 from windward side (i.e. side before heat exchanger 30).

As shown in figure 11, facilities and the shape of each raised piece 50,60 of the raised piece 50,60 on each heat transfer part 70 of fin 35 are identical with the fin 36 of the first embodiment.A quantity only example of the raised piece 50,60 shown in this figure, this is also the same with the first embodiment.

Specifically, on each heat transfer part 70 of fin 35, in the region from close leeward side of pars intermedia 71 until the part of leeward end 73 is disposed with multiple raised piece 50,60 along air by direction.The one group of raised piece be arranged on the position of windward side forms weather side raised piece 50, and the one group of raised piece be arranged on the position of leeward side forms downwind side raised piece 60.The length of each raised piece 50,60 is equal to each other.

On each heat transfer part 70 of fin 35, a part of weather side raised piece 50a be positioned on the position of windward side is asymmetric raised piece.On each heat transfer part 70, be positioned at a part of weather side raised piece 50b on the position near leeward side and all downwind side raised piece 60 are symmetric form raised piece.

On each heat transfer part 70 of fin 35, weather side raised piece 50 and downwind side raised piece 60 tilt towards direction contrary each other.The end 53 that cuts of the windward side of weather side raised piece 50 is heaved to the left, and the end 53 that cuts of the leeward side of weather side raised piece 50 is heaved to the right.That is, weather side raised piece 50 leeward side cut end 53 to outstanding with the direction of heaving direction identical of the 3rd swells 83.On the other hand, the end 63 that cuts of the windward side of downwind side raised piece 60 is heaved to the right, and the end 63 that cuts of the leeward side of downwind side raised piece 60 is heaved to the left.

-effect of the second embodiment-

The effect that can obtain with the heat exchanger 30 of present embodiment is identical with the effect that can obtain with the heat exchanger 30 of above-mentioned first embodiment.

That is, the same with the first embodiment, in the heat exchanger 30 of present embodiment, the part of the windward side of each heat transfer part 70 of fin 35 is provided with swells 81 ~ 83, and is provided with raised piece 50,60 in the part of the leeward side of each this heat transfer part 70.The same with the first embodiment, in the heat exchanger 30 of present embodiment, the width be positioned near the first swells 81 on the position of windward side is the widest, and the height heaving direction of this first swells 81 is minimum.Therefore, on each heat transfer part 70 of fin 35, the frost amount be attached in the part of windward side is less with the difference being attached to the frost amount in the part of leeward side.Consequently, the duration heating running of air conditioner 10 can be made to increase, the essence heating capacity of air conditioner 10 can be improved.

The same with the first embodiment, in the heat exchanger 30 of present embodiment, lower end 81e, 82e, 83e of swells 81 ~ 83 tilt, and the weather side raised piece 50a be positioned on the position of windward side is asymmetric raised piece.Therefore, it is possible to minimizing residues in the condensation water quantity on heat transfer part 70 surface when defrosting release, the time interval (heating the duration of running) till when consequently can make next time to defrost action increases.

(the 3rd embodiment of invention)

3rd embodiment of the present invention is described.The heat exchanger 30 of the 3rd embodiment is the heat exchanger changing the structure of fin 35 in the heat exchanger 30 of the first embodiment.At this, the fin 36 be arranged in the heat exchanger 30 of present embodiment and fin 36 difference be arranged in the heat exchanger 30 of the first embodiment are described.

As shown in Figure 13 and Figure 14, the same with the fin 36 of the first embodiment, the fin 36 of present embodiment is formed the first swells 81, second swells 82, the 3rd swells 83 and weather side raised piece 50.The fin 36 of present embodiment is formed with downwind side swells 85, to replace downwind side raised piece 60.The fin 36 of present embodiment adds and has auxiliary swollen part 86, upper horizontal flank 91 and lower horizontal flank 92.The deployment scenarios of the protuberance 48 of the fin 36 of present embodiment is different from the fin 36 of the first embodiment.

The first swells 81, second swells 82 be formed on the fin 36 of present embodiment is different from the first embodiment with deployment scenarios with the respective shape of the 3rd swells 83.Should illustrate, the first swells 81, second swells 82 and the 3rd swells 83 set gradually from the leading edge 38 of fin 36 towards trailing edge 39, and this point is identical with the first embodiment.

On each heat transfer part 70 of the fin 36 of present embodiment, be formed with the first swells 81 across windward end 72 and pars intermedia 71, pars intermedia 71 is formed the second swells 82 and the 3rd swells 83.Upper end 81d ~ the 83d of each swells 81 ~ 83 and lower end 81e ~ 83e is in fact orthogonal with the leading edge 38 of fin 36 above.The length of the first swells 81 is shorter than the length of the second swells 82.The length of the second swells 82 is equal with the length of the 3rd swells 83.The width of each swells 81 ~ 83 broadens (W3 < W1 < W2) according to the order of the 3rd swells 83, first swells 81, second swells 82.The height heaving direction of each swells 81 ~ 83 is equal to each other (H1=H2=H3).

The same with the first embodiment, on the fin 36 of present embodiment, be formed with multiple raised piece 50 in the leeward side of the 3rd swells 83.The same with the first embodiment, a part of raised piece 50a be positioned on the position of windward side is asymmetric raised piece, and other the raised piece 50b be positioned on the position of leeward side are symmetric form raised piece.The same with the first embodiment, on the fin 36 of present embodiment, the end 53 that cuts of the leeward side of each raised piece 50 heaves direction outstanding (with reference to Figure 14 (B)) to the 3rd swells 83.

As shown in Figure 14 (A), the distance L4 till the lower end count distance L1 till the upper end of pars intermedia 71 from the upper end of the second swells 82 and the 3rd swells 83, count distance L2 till the lower end of pars intermedia 71 from the lower end of the second swells 82 and the 3rd swells 83, counted the distance L3 till the upper end of pars intermedia 71 and count pars intermedia 71 from the lower end of raised piece 50a, 50b from the upper end of raised piece 50a, 50b is equal to each other.

The same with the first embodiment, on the fin 36 of present embodiment, the windward end 72 of heat transfer part 70 is formed with protuberance 48.At this, on each heat transfer part 70 of the fin 36 of present embodiment, ratio first swells 81 of end 72 of being in the wind also is formed with a protuberance 48 in the part of windward side.This protuberance 48 is arranged near the central authorities of the above-below direction of windward end 72.This protuberance 48 tilts relative to the leading edge 38 of fin 36.

Upper horizontal flank 91 and lower horizontal flank 92 are formed on each heat transfer part 70 of fin 36.Upper horizontal flank 91 is formed in the upside of the first swells 81, and lower horizontal flank 92 is formed in the downside of the first swells 81.The shape of each horizontal flank 91,92 is that extend to the second swells 82 from the leading edge 38 of fin 36, straight and elongated ridge shape.With each swells 81,82,83 the same, each horizontal flank 91,92 is formed by making heat transfer part 70 heave to venting flow path 40.Each horizontal flank 91,92 heave direction and each swells 81 ~ 83 to heave direction identical.

Each heat transfer part 70 of fin 36 is formed with an auxiliary swollen part 86 respectively.On each heat transfer part 70, auxiliary swollen part 86 is arranged on the leeward side of raised piece 50.On each heat transfer part 70, auxiliary swollen part 86 is formed in from pars intermedia 71 until the position of leeward end 73.

Auxiliary swollen part 86 forms by making fin 36 heave, and is formed as mountain shape.Auxiliary swollen part 86 is extended to the air in venting flow path 40 by the direction that direction is crossing.On the fin 36 of present embodiment, each auxiliary swollen part 86 is looked from the leading edge 38 of fin 36 and is heaved to the right.The crest line 86a of auxiliary swollen part 86 is parallel with the leading edge 38 of fin 36 in fact.That is, the crest line 86a of auxiliary swollen part 86 is crossing with the air-flow direction in venting flow path 40.The lower end of auxiliary swollen part 86 be just located below the closer to leeward side tilts.

As shown in Figure 14 (B), the height H 3 heaving direction low (H5 < H3) of height H 5 to the three swells 83 heaving direction of auxiliary swollen part 86.As shown in Figure 14 (A), the air of auxiliary swollen part 86 passes through the width W 3 narrow (W5 < W3) in direction by the air of width W 5 to the three swells 83 in direction.

A downwind side swells 85 is formed respectively in the leeward side of each notch 45.Each downwind side swells 85 is formed in these plate portions across the leeward end 73 of web portion 75, the leeward end 73 being positioned at the upside in this web portion 75 and the downside that is positioned at this web portion 75.

Downwind side swells 85 forms by making fin 36 heave, and is formed as mountain shape.Downwind side swells 85 is extended to the air in venting flow path 40 by the direction that direction is crossing.On the fin 36 of present embodiment, each downwind side swells 85 is looked from the leading edge 38 of fin 36 and is heaved to the right.The crest line 85a of downwind side swells 85 is parallel with the leading edge 38 of fin 36 in fact.That is, the crest line 85a of downwind side swells 85 is crossing with the air-flow direction in venting flow path 40.

As shown in Figure 14 (B), the height H 4 heaving direction of downwind side swells 85 and the height H 2 heaving direction equal (H4=H2) of the second swells 82.As shown in Figure 14 (A), the air of downwind side swells 85 is by the width W 4 in direction and the width W 2 equal (W4=W2) of the air of the second swells 82 by direction.

On the fin 36 of present embodiment, between adjacent downwind side swells 85, be formed with a protuberance 48 respectively.That is, the leeward end 73 of each heat transfer part 70 of this fin 36 is respectively arranged with a protuberance 48.

-effect of three embodiment-

Heat exchanger 30 according to the present embodiment, can obtain the effect identical with the heat exchanger 30 of the first embodiment.

That is, in the heat exchanger 30 of present embodiment, the part of the close windward side of each heat transfer part 70 at fin 36 the same as the first embodiment is provided with swells 81 ~ 83, and is provided with raised piece 50 in the part of the leeward side of swells 81 ~ 83.Therefore, on each heat transfer part 70 of fin 36, the frost amount be attached in the part of windward side reduces with the difference of the frost amount be attached in the part of leeward side.Consequently, the duration heating running of air conditioner 10 can be made to increase, the essence heating capacity of air conditioner 10 can be improved.

(other embodiments)

The variation of the heat exchanger 30 of the first embodiment and the second embodiment is described.

-the first variation-

Also can be such in the heat exchanger 30 of each embodiment above, that is: all weather side raised piece 50 be formed on each heat transfer part 70 of fin 35,36 be asymmetric raised piece.

This variation is applied to the example in the fin 36 of the heat exchanger 30 of above-mentioned first embodiment by Figure 15 display.On each heat transfer part 70 of the fin 36 shown in this figure, all weather side raised piece 50 are asymmetric raised piece, and all downwind side raised piece 60 are symmetric form raised piece.

-the second variation-

On each heat transfer part 70 of fin 35,36 in the heat exchanger 30 being arranged at each embodiment above, also can be such, that is: be in the wind end 72 and pars intermedia 71 whole region in be formed with multiple swells 81,82,83,84, only on leeward end 73, be formed with raised piece 60.

This variation is applied to the example in the fin 36 of the heat exchanger 30 of above-mentioned first embodiment by Figure 16 display.On each heat transfer part 70 of the fin 36 shown in this figure, be provided with four swells 81,82,83,84 in the whole region of be in the wind end 72 and pars intermedia 71, these four swells 81,82,83,84 are arranged along air by direction.Be positioned at and be adjacent to arrange near the 4th swells 84 on the position of leeward side and the 3rd swells 83.The raised piece 60 be formed on leeward end 73 is symmetric form raised piece.

-three variation-

On each heat transfer part 70 of fin 35,36 in the heat exchanger 30 being arranged at each embodiment above, also can be such, that is: the part being formed with raised piece 50,60 of each this heat transfer part 70 be heaved to venting flow path 40.

This variation is applied to the example in the fin 36 of the heat exchanger 30 of above-mentioned first embodiment by Figure 17 (A) display.On each heat transfer part 70 of the fin 36 shown in this figure, the part being formed with raised piece 50,60 is heaved to the direction identical with swells 81 ~ 83.Specifically, the part being formed with weather side raised piece 50 of each heat transfer part 70 tilts towards the direction identical with inclined plane part 81b, 82b, 83b of the windward side of each swells 81 ~ 83.And the part being formed with downwind side raised piece 60 of each heat transfer part 70 tilts towards the direction identical with inclined plane part 81b, 82b, 83b of the leeward side of each swells 81 ~ 83.

-four variation-

On each heat transfer part 70 of fin 35,36 in the heat exchanger 30 being arranged at each embodiment above, the incline direction of each raised piece 50,60 also can be contrary with above-mentioned direction.

This variation is applied to the example in the fin 36 of the heat exchanger 30 of above-mentioned first embodiment by Figure 17 (B) display.On each heat transfer part 70 of the fin 36 shown in this figure, the end 63 that cuts of the windward side of weather side raised piece 50 is heaved to the right, and the end 63 that cuts of the leeward side of this weather side raised piece 50 is heaved to the left.That is, weather side raised piece 50 windward side cut end 53 to outstanding with the direction of heaving direction identical of the 3rd swells 83.On the other hand, the end 53 that cuts of the windward side of downwind side raised piece 60 is heaved to the left, and the end 53 that cuts of the leeward side of this downwind side raised piece 60 is heaved to the right.Should illustrate, described in the above description " right side " and " left side " refers to direction when seeing fin 36 from windward side (i.e. side before heat exchanger 30).

Should illustrate, above embodiment is example preferred in essence, does not have the scope be intended to the present invention, application of the present invention or its purposes to be limited.

-industrial applicability-

In sum, the present invention is very useful to the heat exchanger with flat tube and the fin be arranged above and below.

-symbol description-

10 air conditioners

20 refrigerant loops

30 heat exchangers

33 flat tubes

34 fluid passages (path)

35 fins

36 fins

38 leading edges

40 venting flow path

Plate portion in 41

45 notch

50 weather side raised piece (raised piece)

50a weather side raised piece (asymmetric raised piece)

53 cut end

54 cardinal margin portions

55 upper edge part

Edge on the downside of in the of 56

60 downwind side raised piece (raised piece)

63 cut end

64 cardinal margin portions

65 upper edge part

Edge on the downside of in the of 66

70 heat transfer parts

72 windward ends

73 leeward ends

81 first swells

82 second swells

83 the 3rd swells

84 the 4th swells

Claims

1. a heat exchanger, this heat exchanger comprises many flat tubes (33) and multiple fin (35, 36), many these flat tubes (33) are arranged above and below, the path (34) of fluid is formed in the inside of many these flat tubes (33), this fin (35 multiple, 36) multiple venting flow path (40) of air flowing will be divided between adjacent described flat tube (33), described fin (35, 36) there is multiple heat transfer part (70), this heat transfer part (70) is formed as extending to the tabular of another flat tube (33) from the flat tube (33) in adjacent described flat tube (33) and forms the sidewall of described venting flow path (40), it is characterized in that:

Described fin (35,36) each described in heat transfer part (70) is provided with:

Multiple raised piece (50,60), this raised piece multiple (50,60) is formed by cutting this heat transfer part (70), and

Swells (81 ~ 83), this swells (81 ~ 83) is arranged on than described raised piece (50,60) also in the part of windward side, this swells (81 ~ 83) is heaved by making described heat transfer part (70) and is formed, and extended to air by the direction that direction is crossing

The end (53,63) that cuts cutting end (53,63) and downwind side of the weather side of each raised piece (50,60) of described fin (35,36) is heaved mutually round about,

Described raised piece (50, 60) cut end (53, 63), by cardinal margin portion (54, 64), upper edge part (55, 65) and edge, downside (56, 66) form, this upper edge part (55, 65) be from this cardinal margin portion (54, 64) upper end extends to this raised piece (50, 60) part of upper end, this upper edge part (55, 65) relative to this cardinal margin portion (54, 64) tilt, edge (56 on the downside of this, 66) be from this cardinal margin portion (54, 64) lower end extends to this raised piece (50, 60) part of lower end, edge (56 on the downside of this, 66) relative to this cardinal margin portion (54, 64) tilt,

On each heat transfer part (70) of described fin (35,36), described raised piece (50,60) is edge, described downside (56) the asymmetric raised piece less relative to the gradient of described cardinal margin portion (54) than described upper edge part (55) relative to the gradient of described cardinal margin portion (54) at least partially.

2. heat exchanger according to claim 1, is characterized in that:

In a part of raised piece (50) on the position being at least positioned near described swells (81 ~ 83) in described raised piece (50,60) on each heat transfer part (70) being arranged on described fin (35,36), the leeward side of this raised piece (50) cut end (53) to this swells (81 ~ 83) to heave direction outstanding.

3. heat exchanger according to claim 1 and 2, is characterized in that:

On each heat transfer part (70) of described fin (35,36), the raised piece (50) be formed in the part adjacent with described flat tube (33) is described asymmetric raised piece.

4. heat exchanger according to claim 1, is characterized in that:

Each heat transfer part (70) of described fin (35,36) comprises the leeward end (73) being positioned at and going back on the position of leeward side than described flat tube (33),

The described leeward end (73) of each heat transfer part (70) of described fin (35,36) is provided with described raised piece (60).

5. heat exchanger according to claim 1, is characterized in that:

On each heat transfer part (70) of described fin (35,36), be disposed with multiple described swells (81 ~ 83) along air by direction.

6. heat exchanger according to claim 5, is characterized in that:

In multiple described swells (81 ~ 83) on each heat transfer part (70) being formed in described fin (35,36), the air be positioned near the swells (81) on the position of windward side is the widest by the width in direction.

7. the heat exchanger according to claim 5 or 6, is characterized in that:

In multiple described swells (81 ~ 83) on each heat transfer part (70) being formed in described fin (35,36), the height heaving direction be positioned near the swells (81) on the position of windward side is minimum.

8. heat exchanger according to claim 5, is characterized in that:

On each heat transfer part (70) of described fin (35,36), the end (38) of the windward side from this heat transfer part (70), to the air than this heat transfer part (70), the part of central authorities also near the position of leeward side in direction is provided with multiple described swells (81 ~ 83).

9. heat exchanger according to claim 5, is characterized in that:

Each heat transfer part (70) of described fin (35,36) comprises the windward end (72) being positioned at and going back on the position of windward side than described flat tube (33),

On each heat transfer part (70) of described fin (35,36), from described windward end (72) until the position of the part of the leeward side of this windward end (72) is provided with multiple described swells (81 ~ 83).

10. heat exchanger according to claim 5, is characterized in that:

On each heat transfer part (70) of described fin (35,36), the lower end of each swells (81 ~ 83) be just located below the closer to leeward side tilts.

11. heat exchangers according to claim 1, is characterized in that:

Described fin (36) is formed as the tabular being provided with multiple notch (45), this notch (45) is used for described flat tube (33) to insert in this notch (45), described fin (36) is arranged along the bearing of trend of described flat tube (33) with leaving predetermined distance each other, described fin (36) periphery of described notch (45) clips described flat tube (33)

On described fin (36), the part between notch (45) adjacent in the vertical direction forms described heat transfer part (70).

12. heat exchangers according to claim 1, is characterized in that:

Described fin (35) to be arranged between adjacent described flat tube (33) and the corrugated fin of crawling up and down, and there is multiple described heat transfer part (70) and multiple middle plate portion (41), multiple this heat transfer part (70) arranges along the bearing of trend of described flat tube (33), in this, plate portion (41) are the parts be connected with the upper end of adjacent this heat transfer part (70) or lower end, and in this, plate portion (41) engage with this flat tube (33).

13. 1 kinds of air conditioners, is characterized in that:

Described air conditioner comprises the refrigerant loop (20) being provided with heat exchanger according to claim 1 (30),

Described air conditioner makes refrigerant circulation and carries out kind of refrigeration cycle in described refrigerant loop (20).