CN104359251A - Evaporator and air cooler - Google Patents
Evaporator and air cooler Download PDFInfo
- Publication number
- CN104359251A CN104359251A CN201410549593.7A CN201410549593A CN104359251A CN 104359251 A CN104359251 A CN 104359251A CN 201410549593 A CN201410549593 A CN 201410549593A CN 104359251 A CN104359251 A CN 104359251A
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- China
- Prior art keywords
- evaporimeter
- fin
- air
- spacing
- evaporator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010257 thawing Methods 0.000 abstract description 13
- 238000005057 refrigeration Methods 0.000 abstract description 3
- 239000011295 pitch Substances 0.000 abstract 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000011218 segmentation Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/02—Details of evaporators
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Abstract
The invention discloses an evaporator and an air cooler. The evaporator is divided into at least two sections along the flowing direction of air, the fin pitches of the evaporators in the sections are equal, and the fin pitches of the evaporators between the sections are sequentially reduced along the flowing direction of the air. The air cooler comprises the evaporator. The evaporator and the air cooler comprising the same are used in a low-temperature refrigeration system, and the variable fin spacing structure which is reduced along the flowing direction of air in a segmented mode is adopted, so that high heat transfer efficiency is kept under the frosting condition. Compared with the traditional evaporator and air cooler, the heat transfer performance is greatly improved, the defrosting period is effectively prolonged, and the defrosting cost is saved.
Description
Technical field
The present invention relates to field of low-temperature refrigeration, particularly relate to a kind of evaporimeter and air-cooler.
Background technology
Air-cooler is refrigeration plant conventional in cryogenic refrigerating system, and its operating temperature is usually all in subzero.Evaporimeter is the core component of air-cooler, and when the freezing point of cold air surface temperature lower than water, the condensate water separated out from humid air, very easily in the surface solidification of evaporimeter, forms frost layer.Because the thermal conductivity of frost is smaller, even if frost thickness is little, also a larger frost layer thermal resistance can be added at the fin outer surface of evaporimeter.The spacing of fin self-consistentency of traditional evaporimeter, after frosting, the air communication channel between fin narrows.When power of fan is certain, because resistance increases, air quantity reduces, and the heat convection between air and frost layer surface can be made to weaken.So traditional air-cooler its heat transfer property after frosting can obviously worsen.
Summary of the invention
Based on this, be necessary the defect for prior art and deficiency, provide a kind of and can improve the evaporimeter of the heat transfer property of air-cooler under frozen condition and comprise the air-cooler of this evaporimeter.
For realizing the evaporimeter that the object of the invention provides, for in cryogenic refrigerating system, described evaporimeter is at least divided into two sections along the flow direction of air, the spacing of fin of the described evaporimeter in each section is equal, and the spacing of fin of each intersegmental described evaporimeter reduces successively along the flow direction of described air.
Wherein in an embodiment, the spacing of fin of described evaporimeter is 6mm-15mm.
Wherein in an embodiment, described evaporimeter is divided into two sections along the flow direction of described air, is respectively first paragraph and second segment; The spacing of fin of the evaporimeter of described first paragraph is greater than the spacing of fin of the evaporimeter of described second segment.
Wherein in an embodiment, described first paragraph is with the windward side of described evaporimeter for starting point, and length is 200mm-300mm.
Wherein in an embodiment, the spacing of fin of the evaporimeter of described first paragraph is 10mm-15mm, and the spacing of fin of the evaporimeter of described second segment is 6mm-8mm.
Wherein in an embodiment, the spacing of fin of the evaporimeter of described first paragraph is 8.5mm or 12.7mm, and the spacing of fin of the evaporimeter of described second segment is 6.4mm.
Correspondingly, for realizing the air-cooler that the object of the invention provides, the evaporimeter described in above-mentioned any embodiment is comprised.
Beneficial effect of the present invention: evaporimeter of the present invention and comprise the air-cooler of this evaporimeter, for in cryogenic refrigerating system, by the change spacing of fin structure that the flow direction segmentation taked along air reduces, thus achieve keep higher heat transfer efficiency under frosting condition.It is relative to traditional evaporimeter and air-cooler, and heat transfer property promotes greatly, and effectively extends the defrosting cycle, has saved defrosting cost.
Accompanying drawing explanation
In order to make the object of evaporimeter of the present invention and air-cooler, technical scheme and advantage clearly understand, below in conjunction with concrete drawings and the specific embodiments, evaporimeter of the present invention and air-cooler are further elaborated.
Fig. 1 is the schematic diagram of an embodiment of the fin structure of evaporimeter of the present invention;
The A-A schematic diagram that Fig. 2 is the fin structure of the evaporimeter shown in Fig. 1.
Detailed description of the invention
The present invention is described in detail below in conjunction with embodiment.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
Evaporator surface frosting is a time dependent transient.Be specially, the frost layer that during starting stage, frost is formed at the fin surface of evaporimeter is thin, thermal resistance is little, the roughness on frost layer surface is larger compared with fin surface, frosting makes the surface temperature of the fin of evaporimeter be tending towards even, thus the surface coefficient of heat transfer between air and frost layer surface is strengthened, so time evaporimeter total heat transfer coefficient increase on the contrary.But the time that this state maintains is very short, only has a few minutes.Afterwards because frost layer is thickening, thermal resistance increases, and the air quantity between the fin of evaporimeter can reduce gradually, and evaporimeter overall heat-transfer coefficient reduces.And, the more important thing is in Frost formation process, air reduces due to exsiccation relative humidity, successively decreases along the frosting degree on the flow direction fin of air, namely the fin frosting close to windward side place is serious, and distance windward side fin frosting is remotely less.So the evaporimeter of the spacing of fin such as traditional is uneconomic.
See Fig. 1 and Fig. 2, based on the process of above-mentioned evaporator surface frosting, the present invention is this feature of successively decreasing along the frosting degree on the flow direction fin of air according to evaporimeter in Frost formation process, a kind of evaporimeter becoming spacing of fin is provided, this evaporimeter is at least divided into two sections along the flow direction of air, the spacing of fin of the evaporimeter in each section is equal, the spacing of fin of each intersegmental evaporimeter reduces successively along the flow direction of air, namely spacing of fin reduces along the flow direction segmentation of air, the spacing of fin near evaporimeter windward side place is made to be greater than spacing of fin away from evaporimeter windward side place.
See Fig. 1 and Fig. 2, when evaporimeter of the present invention adopts and becomes spacing of fin structure, in fact the stagger arrangement distribution of fin has been constituted, when air is horizontal plunder offset strip fin time, being interspersed of fin makes upstream fin (fin near windward side) have detour flow to downstream fin (fin away from windward side), due to streaming of upper reaches fin, the first half heat exchange of fin is strengthened, the distribution of downstream fin makes again runner narrow, flow velocity improves, and the heat exchange of fin latter half is also strengthened.
Provided by the invention for the evaporimeter in cryogenic refrigerating system, the change spacing of fin structure reduced by the flow direction segmentation taked along air, thus achieve keep higher heat transfer efficiency under frosting condition.It is relative to traditional evaporimeter, and heat transfer coefficient improves 30%, and effectively extends the defrosting cycle, has saved defrosting cost.
In general, the heat transfer coefficient of evaporimeter can increase along with the increase of the spacing of fin of evaporimeter, and resistance then can reduce along with the increase of the spacing of fin of evaporimeter.But when spacing of fin diminishes, the heat transfer area of unit volume increases.Therefore, although heat transfer coefficient has diminished, heat output has been likely increase.The spacing of fin of the evaporimeter in the present invention is 6mm-15mm, and when making heat exchange amount identical, the resistance of air is minimum, and the unit resistance heat exchange amount of namely evaporating is maximum.
In actual condition, evaporator surface is serious close to frosting within the scope of the 200-30Omm of its windward side.Given this, as a kind of embodiment, evaporimeter provided by the invention is divided into two sections, see Fig. 1 and Fig. 2 along the flow direction of air, be respectively first paragraph 100 and second segment 200, the spacing of fin L of the evaporimeter of first paragraph 100 is greater than the spacing of fin M of the evaporimeter of second segment 200.
Wherein, first paragraph 100 is with the windward side of evaporimeter for starting point, and length is 200mm-300mm, and second segment 200 is from the terminal of first paragraph 100, until the flight tip of whole evaporimeter.
The fin stagger arrangement of the fin of the evaporimeter of first paragraph 100 and the evaporimeter of second segment 200 distributes, when air is horizontal plunder offset strip fin time, the fin of the evaporimeter making first paragraph 100 that is interspersed of fin produces detour flow to the fin of the evaporimeter of second segment 200, the first half heat exchange of fin is strengthened, the distribution of the fin of the evaporimeter of second segment 200 makes again runner narrow, flow velocity improves, and the heat exchange of fin latter half is also strengthened.
Certainly, evaporimeter provided by the invention, its spacing of fin can also be divided into three sections, four sections and to reduce successively above along the flow direction of air.Along with the increase of number of fragments, the defrosting cycle can extend further, means to save further and fills white cost.But the overall dimensions of evaporimeter is limited, only on the basis that ensure that rational spacing of fin, increase number of fragments and just can heat exchanging performance have a certain upgrade.
The spacing of fin of evaporimeter provided by the invention is divided into two sections to reduce successively along the flow direction of air, extend the defrosting cycle, saved defrosting cost, and structure is simple while raising heat transfer property, is convenient to realize.Its spacing of fin specifically arranges as follows:
As shown in Figure 2, the spacing of fin L of the evaporimeter of first paragraph 100 is 10mm-15mm, and the spacing of fin M of the evaporimeter of second segment 200 is 6mm-8mm.Preferably, the spacing of fin L of the evaporimeter of first paragraph 100 is 8.5mm or 12.7mm, and the spacing of fin M of the evaporimeter of second segment 200 is 6.4mm.
By the setting of above spacing of fin, make evaporimeter of the present invention relative to the evaporimeter of the spacing of fin structure such as traditional, heat transfer coefficient improves 30%, and effectively extends the defrosting cycle, has saved defrosting cost.
Based on same design, present invention also offers a kind of air-cooler, comprise the evaporimeter that above-described embodiment provides.Air-cooler of the present invention is under the appearance and size prerequisite that namely height, width and pipe total length are constant, still higher heat transfer coefficient can be kept when running under frozen condition, its heat transfer coefficient improves 30% on the basis of the air-cooler of the spacing of fin structure such as traditional, and effectively extend the defrosting cycle, save defrosting cost.
Above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (7)
1. an evaporimeter, for in cryogenic refrigerating system, it is characterized in that, described evaporimeter is at least divided into two sections along the flow direction of air, the spacing of fin of the described evaporimeter in each section is equal, and the spacing of fin of each intersegmental described evaporimeter reduces successively along the flow direction of described air.
2. evaporimeter according to claim 1, is characterized in that, the spacing of fin of described evaporimeter is 6mm-15mm.
3. evaporimeter according to claim 2, is characterized in that, described evaporimeter is divided into two sections along the flow direction of described air, is respectively first paragraph (100) and second segment (200); The spacing of fin (L) of the evaporimeter of described first paragraph (100) is greater than the spacing of fin (M) of the evaporimeter of described second segment (200).
4. evaporimeter according to claim 3, is characterized in that, described first paragraph (100) is with the windward side of described evaporimeter for starting point, and length is 200mm-300mm.
5. the evaporimeter according to claim 3 or 4, it is characterized in that, the spacing of fin (L) of the evaporimeter of described first paragraph (100) is 10mm-15mm, and the spacing of fin (M) of the evaporimeter of described second segment (200) is 6mm-8mm.
6. evaporimeter according to claim 5, it is characterized in that, the spacing of fin (L) of the evaporimeter of described first paragraph (100) is 8.5mm or 12.7mm, and the spacing of fin (M) of the evaporimeter of described second segment (200) is 6.4mm.
7. an air-cooler, is characterized in that, comprises the evaporimeter described in any one of the claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410549593.7A CN104359251A (en) | 2014-10-16 | 2014-10-16 | Evaporator and air cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410549593.7A CN104359251A (en) | 2014-10-16 | 2014-10-16 | Evaporator and air cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104359251A true CN104359251A (en) | 2015-02-18 |
Family
ID=52526539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410549593.7A Pending CN104359251A (en) | 2014-10-16 | 2014-10-16 | Evaporator and air cooler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104359251A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449226A (en) * | 2017-06-22 | 2017-12-08 | 北京航天试验技术研究所 | A kind of quick-fried pearl drying box |
| CN108826724A (en) * | 2018-04-10 | 2018-11-16 | 珠海格力电器股份有限公司 | Refrigerating unit, refrigerating equipment and refrigerating unit control method |
| CN109282688A (en) * | 2018-11-27 | 2019-01-29 | 珠海格力电器股份有限公司 | Heat exchange tube for air conditioner condenser, air conditioner and machining method of heat exchange tube |
| CN110926093A (en) * | 2019-12-06 | 2020-03-27 | 四方科技集团股份有限公司 | On-demand defrosting method for air cooler |
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003048660A1 (en) * | 2001-12-04 | 2003-06-12 | Multibrás S.A. Eletrodomésticos | Evaporator for refrigeration systems |
| JP2006343023A (en) * | 2005-06-08 | 2006-12-21 | Mitsubishi Heavy Ind Ltd | Cooler |
| WO2013084455A1 (en) * | 2011-12-08 | 2013-06-13 | パナソニック株式会社 | Heat exchanger and air conditioner provided with same |
| CN203719253U (en) * | 2013-12-11 | 2014-07-16 | 常州市常蒸蒸发器有限公司 | Fin-type evaporator |
| CN203848558U (en) * | 2014-05-28 | 2014-09-24 | 南方英特空调有限公司 | Evaporator core |
| CN204187896U (en) * | 2014-10-16 | 2015-03-04 | 珠海格力电器股份有限公司 | Evaporator and air cooler |
-
2014
- 2014-10-16 CN CN201410549593.7A patent/CN104359251A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003048660A1 (en) * | 2001-12-04 | 2003-06-12 | Multibrás S.A. Eletrodomésticos | Evaporator for refrigeration systems |
| JP2006343023A (en) * | 2005-06-08 | 2006-12-21 | Mitsubishi Heavy Ind Ltd | Cooler |
| WO2013084455A1 (en) * | 2011-12-08 | 2013-06-13 | パナソニック株式会社 | Heat exchanger and air conditioner provided with same |
| CN203719253U (en) * | 2013-12-11 | 2014-07-16 | 常州市常蒸蒸发器有限公司 | Fin-type evaporator |
| CN203848558U (en) * | 2014-05-28 | 2014-09-24 | 南方英特空调有限公司 | Evaporator core |
| CN204187896U (en) * | 2014-10-16 | 2015-03-04 | 珠海格力电器股份有限公司 | Evaporator and air cooler |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449226A (en) * | 2017-06-22 | 2017-12-08 | 北京航天试验技术研究所 | A kind of quick-fried pearl drying box |
| CN108826724A (en) * | 2018-04-10 | 2018-11-16 | 珠海格力电器股份有限公司 | Refrigerating unit, refrigerating equipment and refrigerating unit control method |
| CN109282688A (en) * | 2018-11-27 | 2019-01-29 | 珠海格力电器股份有限公司 | Heat exchange tube for air conditioner condenser, air conditioner and machining method of heat exchange tube |
| CN110926093A (en) * | 2019-12-06 | 2020-03-27 | 四方科技集团股份有限公司 | On-demand defrosting method for air cooler |
| CN110926093B (en) * | 2019-12-06 | 2021-07-23 | 四方科技集团股份有限公司 | On-demand defrosting method for air cooler |
| 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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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150218 |