CN1737470A - Ribbed pipe type evaporator - Google Patents
Ribbed pipe type evaporator Download PDFInfo
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- CN1737470A CN1737470A CN 200510027944 CN200510027944A CN1737470A CN 1737470 A CN1737470 A CN 1737470A CN 200510027944 CN200510027944 CN 200510027944 CN 200510027944 A CN200510027944 A CN 200510027944A CN 1737470 A CN1737470 A CN 1737470A
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- fin
- ribbed
- copper pipe
- evaporator
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Abstract
This invention relates to a ribbed pipe type evaporator, which belongs to cryogenic technology field. The evaporator comprises copper pipe and ribbed, wherein the ribbed covers on the copper pipe vertically, and the space between ribbed is degrade along the air flow direction. Said copper pipe applies sequential or fork mode; besides, it can apply the same ribbed between the ribbed whose spaces are equal. Said invention can improve the working property of the evaporator in the low temperature and frosting behavior through changing the space of the evaporator. The bulk of the evaporator does not increase, so the system stability and production quality can be improved.
Description
Technical field
What the present invention relates to is a kind of evaporimeter that belongs to refrigeration technology field, specifically, is a kind of ribbed pipe type evaporator.
Background technology
Finned tube surface-type evaporimeter is used in refrigeration, refrigerating plant widely at present, for reducing the influence of frosting to refrigeration machine, the method that adopts mainly contains: fin and tube-surface spraying are material modified, establish dehydrating unit at the evaporator inlet place and strengthen spacing of fins.The spraying of fin and tube-surface is material modified be meant that the evaporimeter manufacturing is finished after, a kind of hydrophobic material is uniformly sprayed in whole evaporator external.When evaporator operation, the frost of formation is difficult to come off under the effect of air-flow and vibration attached to its surface owing to properties of materials.This method can effectively reduce the thickness of frost layer, but owing to increased material modified and spraying coating process, its manufacturing cost can obviously improve, and because the existence of sprayed coating, heat transfer coefficient also can reduce; Another method is to establish a dehydrating unit in addition in the porch of evaporimeter, comprises dehumidifying coil pipe or chemical hygroscopic layer, so just can reduce the water capacity of evaporator inlet place air, thereby reduce the frosting degree of evaporator surface.This method make whole system become complicated, and manufacturing expense also can improve owing to increased new device.Because the existence of front-seat dehydrating unit makes the pressure drop of whole evaporimeter increase, the energy consumption of blower fan improves, and systematic running cost improves, and also there is the problem in an operate in saturation cycle in defrost mechanism itself.Strengthen immediate problem that spacing of fins brings and be reducing of heat exchange area in the unit volume, thereby evaporimeter needs more volume in refrigerating plant, and the length of heat exchange copper tube to increase, thereby cause the raising of the cost of whole system.
Find that by prior art documents the Chinese patent publication number is: 1081759A, patent name is: evaporator without frost, this patent readme is: " with gas is cold carrier, and evaporating temperature is lower than the evaporimeter in the various refrigeration systems of zero degree.Its structure with evaporimeter, blower fan place one with extraneous isolate fully, material is with in metal or the nonmetal closure casing of making, and places drier and cold storage body in the housing.All pipe, line and holes that lead in the housing seal.Drier absorbs the moisture in the gas, makes evaporimeter reach frostless operation, keeps higher Coefficient K value, and cold storage body and cold airflow forced-convection heat transfer have improved the efficient of compressor." this patent utilization drier reduces humidity to the cold air that enters evaporimeter, thereby hope reaches the frostless operation of evaporimeter.In practice, there is the problem of an efficient in drier, can not be with the moisture Ex-all of air in limited flow process, and essential the shutdown changed when drier is saturated, and air communication overdrying drying prescription can cause very big pressure drop, the increase energy consumption.The whole closed operations of whole evaporimeter also are difficult to reach in engineering, and various pipelines all must pass annular seal space, and are faced with the excessive problem of the complicated volume of evaporation structure.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art part, a kind of ribbed pipe type evaporator is provided, make it improve the evaporimeter steady operation cycle, improve the heat exchange property under its frozen condition, reduce the manufacturing expense of evaporimeter simultaneously.
The present invention is achieved by the following technical solutions, the present invention includes: be enclosed within on the copper pipe after establishing the hole in the middle of copper pipe, the fin, fin, fin is vertical with copper pipe, and the spacing of fin reduces gradually along air-flow direction.
Described copper pipe adopts in-line arrangement or fork row mode.
Adopt hydraulic pressure or mechanical expanding to be connected between described copper pipe and the fin, to reduce thermal contact resistance between the two.
Described fin, its pitch of fins identical the layer between can adopt same fin, can conveniently process like this, reduce cost.
Described fin, under the certain situation of whole disengagement area, spacing of fins strengthens on the evaporimeter windward side, and spacing of fins is corresponding reduces for back row.
Liquid refrigerant flows in copper pipe, constantly absorbs heat around evaporimeter, in the in-tube evaporation gasification, surrounding air is constantly lowered the temperature, thereby reach the refrigeration purpose.Cold-producing medium flows into from inlet, flows out from liquid outlet to be following current, otherwise is adverse current.Liquid refrigerant is supercooled state (during following current) when just entering evaporimeter, and intake air temperature at this moment is higher, and both temperature difference are big, so heat exchange is strong, again because the humidity of intake air is also high, so frosting is obvious.Strengthen the spacing of fins on the windward side, avoided on the one hand because the runner that frosting seriously causes blocks, and reducing owing to front-seat heat exchange area, make the super cooled sect of cold-producing medium prolong, move behind the point that two phase flow takes place, make latent heat heat exchanging segment (two phase flow section) mostly occur the little back row of spacing of fins, because front-seat spacing is big, the decay of air velocity is little, and the speed of facining the wind during the row's heat exchange of back strengthens, and helps strengthening heat exchange.During adverse current in the front-seat big fin section cold-producing medium for hot excessively, because the temperature difference of superheat section cold-producing medium and incoming flow gas less (with the supercooled state ratio), it is little when on the one hand frosting degree can be than following current, front-seat on the other hand spacing of fins strengthens, move after making two-phase point, thereby the strongest two-phase section of heat exchange is positioned at the closeer fin section of back row, thereby remedies because the heat exchange loss that front-seat heat exchange area reduces to bring.In a word, no matter be following current or counter-flow arrangement, sensible heat transfer Duan Jun occurs in big spacing of fins district, makes the sub-fraction sensible heat be used for the water capacity that air-flow reduces air-flow.Because it is big that fin is levied spacing, the obstruction of runner is little, and the decay of air velocity is little, thereby can guarantee that air-flow crosses and the little part (two-phase section of cold-producing medium) of spacing of fins with higher velocity flow, strengthens the latent heat exchange.
The present invention utilizes the thickness of frost layer to reduce this characteristic gradually with the flow of cold air direction, change this constant traditional structure of whole evaporator fin spacing, under the prerequisite that does not increase total disengagement area (disengagement area consumes directly related with metal material), the evaporator fin spacing reduces successively with airflow direction, prolong the evaporator defrost cycle thereby reach, reduce system energy consumption, and don't increase the purpose (consumption of metal material is relevant with cost) of manufacturing cost.Consider from heat exchange efficiency, this structure is keeping under the certain situation of whole heat exchange area, spacing of fins strengthens on the evaporimeter windward side, make the face velocity of the fin that the back parallelism is closeer improve, by this structure, prolong the defrosting cycle of evaporimeter, improve heat exchange efficiency, reduce the fan operation energy consumption.The present invention utilizes the characteristics of evaporimeter frosting varied in thickness, improves its service behaviour under the low temperature frozen condition by a pitch of fins that changes evaporimeter.Because the required disengagement area of specific refrigerating effect is constant, the volume of evaporimeter does not increase yet, thus the manufacturing cost that does not increase, and because the improvement of heat exchange property, the operating cost of whole system reduces, because the prolongation of defrosting cycle also makes the quality of the stability of a system and product be improved.
The specific embodiment
As shown in Figure 1, the present invention includes: copper pipe 1, fin 2, after establishing the hole, fin 2 centres are enclosed within on the copper pipe 1, and fin 2 is vertical with copper pipe 1, and the spacing of fin 2 reduces gradually along air-flow direction.
Described copper pipe 1 adopts in-line arrangement or fork row mode.
Adopt hydraulic pressure or mechanical expanding to be connected between described copper pipe 1 and the fin 2, to reduce thermal contact resistance between the two.
Described fin 2, under the certain situation of whole disengagement area, fin 2 spacings strengthen on the evaporimeter windward side, corresponding the reducing of back row's fin 2 spacings.Described fin 2 spacings can adopt different spacing combinations according to the actual needs.As: D
1=10mm, D
2=8mm, D
3=8mm, D
4=6mm, D
5The scheme of=6m.
Described fin 2 adopts same fin between the identical layer of its pitch of fins, can conveniently process like this, reduce cost.
Claims (3)
1. ribbed pipe type evaporator, comprise: copper pipe (1), fin (2), it is characterized in that, be enclosed within on the copper pipe (1) after establishing the hole in the middle of the fin (2), fin (2) is vertical with copper pipe (1), the spacing of fin (2) reduces gradually along air-flow direction, and copper pipe (1) adopts in-line arrangement or fork row mode, adopts same fin between the identical layer of fin (a 2) pitch of fins.
2. ribbed pipe type evaporator according to claim 1 is characterized in that, adopts hydraulic pressure or mechanical expanding to be connected between described copper pipe (1) and the fin (2).
3. ribbed pipe type evaporator according to claim 1 is characterized in that, described fin (2), and under the certain situation of whole disengagement area, fin on the evaporimeter windward side (2) spacing strengthens, corresponding the reducing of back row's fin (2) spacing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510027944 CN1737470A (en) | 2005-07-21 | 2005-07-21 | Ribbed pipe type evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510027944 CN1737470A (en) | 2005-07-21 | 2005-07-21 | Ribbed pipe type evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1737470A true CN1737470A (en) | 2006-02-22 |
Family
ID=36080355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510027944 Pending CN1737470A (en) | 2005-07-21 | 2005-07-21 | Ribbed pipe type evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1737470A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963418A (en) * | 2009-07-21 | 2011-02-02 | 江森自控楼宇设备科技(无锡)有限公司 | Micro channel heat exchanger for air-conditioner heat pump |
| CN103994674A (en) * | 2014-06-04 | 2014-08-20 | 无锡杰尔压缩机有限公司 | Unequal-interval pipe and fin type heat exchanger |
| CN104864757A (en) * | 2015-06-04 | 2015-08-26 | 华北电力大学 | Cylindrical structure gradual-change fin phase change heat accumulator |
| CN106225208A (en) * | 2016-08-02 | 2016-12-14 | 广东志高空调有限公司 | A kind of multiple rows of heat exchanger |
| CN107062427A (en) * | 2017-04-20 | 2017-08-18 | 西安工程大学 | A kind of mechanical refrigerating hybrid air-conditioner system of window evaporation cooling |
| CN109070697A (en) * | 2016-06-01 | 2018-12-21 | 株式会社电装 | cold-storage heat exchanger |
| WO2019176803A1 (en) * | 2018-03-12 | 2019-09-19 | 株式会社Uacj | Heat exchanger for freezer refrigerator |
| CN111412691A (en) * | 2020-03-13 | 2020-07-14 | 珠海格力电器股份有限公司 | Heat exchanger and air conditioner |
-
2005
- 2005-07-21 CN CN 200510027944 patent/CN1737470A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963418A (en) * | 2009-07-21 | 2011-02-02 | 江森自控楼宇设备科技(无锡)有限公司 | Micro channel heat exchanger for air-conditioner heat pump |
| CN101963418B (en) * | 2009-07-21 | 2012-09-05 | 约克（无锡）空调冷冻设备有限公司 | Micro channel heat exchanger for air-conditioner heat pump |
| CN103994674A (en) * | 2014-06-04 | 2014-08-20 | 无锡杰尔压缩机有限公司 | Unequal-interval pipe and fin type heat exchanger |
| CN104864757A (en) * | 2015-06-04 | 2015-08-26 | 华北电力大学 | Cylindrical structure gradual-change fin phase change heat accumulator |
| CN109070697A (en) * | 2016-06-01 | 2018-12-21 | 株式会社电装 | cold-storage heat exchanger |
| CN106225208A (en) * | 2016-08-02 | 2016-12-14 | 广东志高空调有限公司 | A kind of multiple rows of heat exchanger |
| CN107062427A (en) * | 2017-04-20 | 2017-08-18 | 西安工程大学 | A kind of mechanical refrigerating hybrid air-conditioner system of window evaporation cooling |
| WO2019176803A1 (en) * | 2018-03-12 | 2019-09-19 | 株式会社Uacj | Heat exchanger for freezer refrigerator |
| JPWO2019176803A1 (en) * | 2018-03-12 | 2021-03-11 | 株式会社Uacj | Heat exchanger for refrigerator / freezer |
| CN111412691A (en) * | 2020-03-13 | 2020-07-14 | 珠海格力电器股份有限公司 | Heat exchanger and air conditioner |
| CN111412691B (en) * | 2020-03-13 | 2021-09-07 | 珠海格力电器股份有限公司 | Heat exchanger and air conditioner |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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