CN202532683U - Small-caliber finned tube type heat exchanger for air conditioner - Google Patents

Small-caliber finned tube type heat exchanger for air conditioner Download PDF

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Publication number
CN202532683U
CN202532683U CN2012202070471U CN201220207047U CN202532683U CN 202532683 U CN202532683 U CN 202532683U CN 2012202070471 U CN2012202070471 U CN 2012202070471U CN 201220207047 U CN201220207047 U CN 201220207047U CN 202532683 U CN202532683 U CN 202532683U
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China
Prior art keywords
heat exchanger
heat
fin
footpath
radiating fin
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Withdrawn - After Issue
Application number
CN2012202070471U
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Chinese (zh)
Inventor
曾晓程
陈凌云
沈增友
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China Yangzi Group Chuzhou Yangzi Air Conditioner Co Ltd
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China Yangzi Group Chuzhou Yangzi Air Conditioner Co Ltd
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Priority to CN2012202070471U priority Critical patent/CN202532683U/en
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Publication of CN202532683U publication Critical patent/CN202532683U/en
Anticipated expiration legal-status Critical
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Abstract

The utility model discloses a small-caliber finned tube type heat exchanger for an air conditioner. The small-caliber finned tube type heat exchanger comprises a plurality of heat radiating fins and multiple rows and lines of heat transfer tubes, wherein the heat radiating fins are arranged in parallel and provided with multiple rows and lines of expanded connection holes, the heat transfer tubes are in vertical expanded connection with the heat radiating fins through the expanded connection holes, and outer sides of the heat transfer tubes of the heat exchanger are forced to ventilate and exchange heat by a fan. The small-caliber finned tube type heat exchanger is characterized in that the progressively decreasing direction of the air velocity of the fan is set as an X-direction, the widths of the heat radiating fins arranged along the X-direction are gradually narrowed, and the number of lines of the expanded connection holes on the heat radiating fins is gradually decreased. According to the utility model, the number of lines of the heat transfer tubes of a heat radiator is adjusted aiming at the progressive decrease of air velocity, namely more rows of the heat transfer tubes are arranged at an area with large air velocity and fewer rows of heat transfer tubes are arranged at an area with low air velocity; and the heat radiating fins with larger widths are arranged at the area with large air velocity and the heat radiating fins with smaller widths are arranged at the area with low air velocity. Therefore, the averaged heat exchange efficiency of unit area of the small-caliber finned tube type heat exchange is improved, and furthermore, the performance of a refrigerating system is improved.

Description

A kind of idle call tubule footpath fin-tube heat exchanger
Technical field
The present invention relates to a kind of idle call tubule footpath fin-tube heat exchanger, particularly relate to the tubule footpath fin-tube heat exchanger that a kind of pipeline flow process is more, pipe row number is more.
Background technology
Fin-tube heat exchanger is that field of Refrigeration and Air-conditioning is used the most general heat exchanger, has advantages such as simple in structure, reliable, that cost is lower.
The heat exchanger tube of existing fin-tube heat exchanger is generally made many row's multiple rows, and equates with the pipe row number average of a slice heat exchanger along airflow direction.Its advantage is the rectangle that is shaped as of fin, and processing technology is simple.But remain in following problem in actual the use:
As shown in Figure 1, it is the heat-transfer pipe 12 of φ 9.52 that existing idle call heat exchanger 1 (especially condenser) generally adopts external diameter, because caliber is bigger, the width of radiating fin 11 is also bigger.So the pipe of existing heat exchanger row number is too much unsuitable, otherwise the gas-flow resistance of the fin of flowing through, noise all increase, and the power consumption of blower fan also increases.
The forced ventilation mode is adopted in the pipe outside heat exchange of fin-tube heat exchanger, considers that from saving the space generally be arranged on the machine top to blower fan 2, heat exchanger is arranged on the side lower part of blower fan.But adopt this structure, the heat exchanger air velocity everywhere of flowing through is unequal.To the heat exchanger of pipe row number many (big along the airflow direction gauge), pipe columns many (height dimension of uprush direction is big), this species diversity is bigger.A kind of existing structure heat exchanger and blower fan position view as shown in Figure 1, its airflow field VELOCITY DISTRIBUTION is successively decreased from top to bottom successively, on/following maximum difference is near 2 times.
And the exothermic coefficient in the pipe outside is closely related with the air velocity that skims over fin surface, because the otherness of air velocity causes the coefficient of heat transfer of heat exchanger zones of different inconsistent, total heat exchange area can not effectively utilize, and the heat exchange efficiency of whole heat exchanger is not high.
In recent years, for saving material (especially copper material), raise the efficiency and adapt to the needs of environmental protection working medium high workload pressure, the throw oneself into thin footpath research work of heat-transfer pipe of many scientific research institutions, universities and colleges and specialized factory has obtained some achievements.But in practical application, still have many problems to further investigate: after diminishing like caliber, pipe is inboard flows, conducts heat all and to incite somebody to action that great changes will take place, and without a moment's thought, simply with " carefully " generation " slightly ", the state parameter of refrigeration system can depart from normal range (NR); After caliber diminished, the heat exchange area in the pipe outside also diminished, and off design performances such as low-temperature heating also can be affected.Think the performance that improves heat exchanger, the structural parameters (comprising pipeline, flow process) even the profile of tubule footpath heat exchanger all must be adjusted significantly.
Summary of the invention
For overcoming the deficiency of existing fin-tube heat exchanger; The object of the present invention is to provide a kind of fin-tube heat exchanger of new structure; Through changing width, the reasonable Arrangement pipeline flow process of pipe row's number and radiating fin; Make the heat exchange basically identical of heat exchanger each several part, thereby improve the heat exchange efficiency of whole heat exchanger.
Technical solution problem of the present invention adopts following technical scheme:
A kind of idle call tubule footpath fin-tube heat exchanger; The radiating fin that comprises the many row's multiple rows of being provided with of a plurality of parallel arrangements expanded joint hole; And arrange multiple row through the heat-transfer pipe of expanded joint hole with the vertical expanded joint of radiating fin more; Blower fan forced ventilation heat exchange is adopted in the said Exchanger Tubes outside, and its design feature is:
Set fan airflow decrease of speed direction for for directions X, narrowing down gradually along the set radiating fin width of directions X so, the expanded joint hole columns that said radiating fin is provided with successively decreases gradually.
A kind of idle call tubule footpath fin-tube heat exchanger, its design feature also be,
Said radiating fin width is staged and narrows down gradually, and the expanded joint hole columns that said radiating fin is provided with also is staged and successively decreases gradually.
Wherein A width numerical value is 50.8cm~72.7cm to said radiating fin width to narrow A, B, three gradient regions of C of experiencing successively by wide, and B width numerical value is 38.1cm~54.6cm, and C width numerical value is 25.4cm~36.4cm; The length ratio of said A, B, three gradient regions of C is 4:3:1.
Said heat-transfer pipe caliber is less than or equal to 7mm.
Described heat-transfer pipe is in the parallel connection of leeward side demultiplexing, and adjacent two-way merges into one the tunnel again at windward side.
Compared with present technology, beneficial effect of the present invention is embodied in:
1, the present invention adopts tubule footpath heat exchanger tube; After though caliber diminishes; The heat exchange area in the pipe outside also diminishes, and off design performances such as low-temperature heating also can be affected, but owing to the present invention is directed to air velocity this problem of successively decreasing the heat-transfer pipe columns of radiator is adjusted; Promptly many at the big zone row's number of air velocity, the zone row number little in air velocity is few; Width at the big regional radiating fin of air velocity is bigger, and is less at the width of the little regional radiating fin of air velocity, thereby the average heat exchange efficiency of unit are of the present invention is improved, and improved the performance of refrigeration system on the contrary.
2, the tubule of identical wall thickness footpath heat-transfer pipe can bear higher operating pressure, can adapt to the environmental protection working medium demand of high workload pressure; If operating pressure is constant, but wall thickness attenuate then more help conducting heat, save cost simultaneously.
Though 3 maximum row's numbers are more than existing heat exchanger, width is still less than existing heat exchanger, and gas-flow resistance, the noise of the fin of flowing through all reduce, and the power consumption of blower fan also reduces; The speed difference of airflow field also makes moderate progress simultaneously, and is as shown in Figure 2.
4, the pipeline flow process is many, and the flow resistance of cold-producing medium is little, can reduce the compressor power consumption; The heat exchange of heat exchanger is more even simultaneously.
5, adjacent two-way heat-transfer pipe merges into one the tunnel again at windward side, and the tube chamber volume changes, and adapts to the variation tendency of cold-producing medium along the journey specific volume, and inboard the flowing and conduct heat of pipe all is optimized.
6, identical heat exchange area, heat exchanger heat exchange efficiency of the present invention is high, is used in the refrigeration system, can improve the performance of refrigeration system.
7, under the equal heat transfer boundary condition, heat exchanger heat exchange area of the present invention is little, and the cost of material is low;
8, the machine of equal specification, heat exchanger volume of the present invention is little, set structure is compact more.
Description of drawings
Fig. 1 is an existing structure heat exchanger airflow field VELOCITY DISTRIBUTION sketch map.
Fig. 2 is tubule of the present invention footpath fin-tube heat exchanger airflow field VELOCITY DISTRIBUTION sketch map.
Fig. 3 is an existing structure heat exchange manifold schematic flow sheet.
Fig. 4 is tubule of the present invention footpath fin-tube heat exchanger pipeline schematic flow sheet.
Label among the figure: 1 existing fin-tube heat exchanger, 11 radiating fins, 12 heat-transfer pipes, 2 blower fans, 3 tubules footpath fin-tube heat exchanger, 31 tubules footpath radiating fin, 32, tubule footpath efficient heat conducting tube.
The specific embodiment
Below pass through the specific embodiment, and combine accompanying drawing that the present invention is described further.
Tubule footpath fin-tube heat exchanger 3; The tubule footpath radiating fin 31 that comprises the many row's multiple rows of being provided with of a plurality of parallel arrangements expanded joint hole; And arrange multiple row through the tubule footpath efficient heat conducting tube 32 of expanded joint hole with the vertical expanded joint of radiating fin more, and blower fan forced ventilation heat exchange is adopted in the Exchanger Tubes outside, and setting fan airflow decrease of speed direction is directions X; Narrowing down gradually along the set tubule footpath radiating fin width of directions X so, the expanded joint hole columns that radiating fin is provided with successively decreases gradually.
As shown in Figure 2; Tubule footpath radiating fin width is staged and narrows down gradually, and to narrow A, B, three gradient regions of C of experiencing successively, wherein A width numerical value is 50.8cm~72.7cm to its width by wide; B width numerical value is 38.1cm~54.6cm, and C width numerical value is 25.4cm~36.4cm; The length ratio of A, B, three gradient regions of C is 4:3:1; The expanded joint hole columns that tubule footpath radiating fin is provided with also is staged and successively decreases gradually.
Tubule of the present invention footpath efficient heat conducting tube caliber is less than or equal to 7mm.
Tubule of the present invention footpath efficient heat conducting tube is in the parallel connection of leeward side demultiplexing, and adjacent two-way merges into one the tunnel again at windward side.
Below through adopting practicing to compare and further specifying superiority of the present invention of tubule footpath fin-tube heat exchanger that technical scheme of the present invention produces and existing heat exchanger.
Shown in Figure 2, tubule footpath efficient heat conducting tube specification is the efficient inner screw thread copper pipe of φ 7mm, tube pitch Lg=21mm, and row's spacing Lp=13mm, the most large stretch of wide Lk=52mm of fin, a pitch of fins is 1.8mm.
Shown in Figure 2ly be tubule of the present invention footpath fin-tube heat exchanger airflow field VELOCITY DISTRIBUTION sketch map, according to the VELOCITY DISTRIBUTION rule of airflow field, heat exchanger is divided into three zones from top to bottom, and pipe row number is respectively 4 rows, 3 rows, 2 rows.V among the figure 1' ≈ 1.65V 11'.
Existing Exchanger Tubes specification is the efficient inner screw thread copper pipe of φ 9.52mm, tube pitch Lg=25mm, and row's spacing Lp=21.65mm, the wide Lk=65mm of fin, a pitch of fins is 2mm.Shown in Figure 1 is existing structure heat exchanger airflow field VELOCITY DISTRIBUTION sketch map, V among the figure 1≈ 2V 11It is thus clear that the VELOCITY DISTRIBUTION in the airflow field differs greatly up and down.
Shown in Figure 3 is existing structure heat exchange manifold schematic flow sheet, is divided into 10 the tunnel, and every road flow process heat-transfer pipe is about 10m, and the heat-transfer pipe specification is φ 9.52 efficient inner screw thread copper pipes.
Fig. 4 divides 18 the tunnel to merge into 9 the tunnel again, to adapt to the variation of cold-producing medium along the journey specific volume for tubule of the present invention footpath fin-tube heat exchanger pipeline schematic flow sheet.Flow process gas-liquid mixed district, every road heat-transfer pipe is about 6.5m, and the heat-transfer pipe specification is the efficient inner screw thread copper pipe of φ 7mm.Tube refrigerant is the vapour-liquid admixture before converging, and specific volume is big; Converge the back tube refrigerant for liquid, specific volume is little.Such pipeline flow process on-way resistance is less, helps flowing and conducting heat of tubule footpath heat-transfer pipe.
As a comparison; In existing 20RT air-cooled heat pump cold (heat) water unit, substitute existing fin-tube heat exchanger 1 with tubule of the present invention footpath fin-tube heat exchanger 3, guaranteeing under the identical preceding topic of other parts; It is about 14% that copper pipe weight descends, and aluminium foil weight descends about 25%.Test result shows: under the metric system cold test working condition, it is about 1% that the refrigerating capacity of unit improves, and Energy Efficiency Ratio EER improves about 5.3%; Standard heats under the test working condition, and it is about 2.2% that the heating capacity of unit improves, and coefficient of performance COP improves about 2.9%.Shown in the table specific as follows:
Table 1: φ 7 heat transfer copper heat exchangers and the contrast of φ 9.52 heat transmission copper pipe heat exchange material costs:
Table 2: φ 7 heat transmission copper pipe module machines and φ 9.52 heat transmission copper pipe module machine cooling performance comparison:
Table 3: φ 7 heat transmission copper pipe module machines and the contrast of φ 9.52 heat transmission copper pipe module machine hot propertys:

Claims (5)

1. idle call tubule footpath fin-tube heat exchanger; The radiating fin that comprises the many row's multiple rows of being provided with of a plurality of parallel arrangements expanded joint hole; And arrange multiple row through the heat-transfer pipe of expanded joint hole with the vertical expanded joint of radiating fin more; Blower fan forced ventilation heat exchange is adopted in the said Exchanger Tubes outside, it is characterized in that:
Setting fan airflow decrease of speed direction is directions X, is narrowing down gradually along the set radiating fin width of directions X so, and the expanded joint hole columns that said radiating fin is provided with successively decreases gradually.
2. a kind of idle call tubule according to claim 1 footpath fin-tube heat exchanger is characterized in that said radiating fin width is staged and narrows down gradually, and the expanded joint hole columns that said radiating fin is provided with also is staged and successively decreases gradually.
3. a kind of idle call tubule according to claim 2 footpath fin-tube heat exchanger; It is characterized in that; Said radiating fin width by wide to narrow A, B, three gradient regions of C of experiencing successively; Wherein A width numerical value is 50.8cm~72.7cm, and B width numerical value is 38.1 cm~54.6 cm, and C width numerical value is 25.4 cm~36.4 cm; The length ratio of said A, B, three gradient regions of C is 4:3:1.
4. a kind of idle call tubule according to claim 3 footpath fin-tube heat exchanger is characterized in that said heat-transfer pipe caliber is less than or equal to 7mm.
5. according to the described a kind of idle call tubule of above-mentioned any claim footpath fin-tube heat exchanger, it is characterized in that described heat-transfer pipe is in the parallel connection of leeward side demultiplexing, adjacent two-way merges into one the tunnel again at windward side.
CN2012202070471U 2012-05-09 2012-05-09 Small-caliber finned tube type heat exchanger for air conditioner Withdrawn - After Issue CN202532683U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102767895A (en) * 2012-05-09 2012-11-07 中国扬子集团滁州扬子空调器有限公司 Air conditioner used thin finned tube heat exchanger
CN104266411A (en) * 2014-10-16 2015-01-07 中国扬子集团滁州扬子空调器有限公司 Combined air cooling heat exchange assembly for composite refrigeration system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102767895A (en) * 2012-05-09 2012-11-07 中国扬子集团滁州扬子空调器有限公司 Air conditioner used thin finned tube heat exchanger
CN102767895B (en) * 2012-05-09 2014-07-09 中国扬子集团滁州扬子空调器有限公司 Air conditioner used thin finned tube heat exchanger
CN104266411A (en) * 2014-10-16 2015-01-07 中国扬子集团滁州扬子空调器有限公司 Combined air cooling heat exchange assembly for composite refrigeration system

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C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20121114

Effective date of abandoning: 20140709

RGAV Abandon patent right to avoid regrant