CN108844259B - Evaporator and air conditioning unit - Google Patents
Evaporator and air conditioning unit Download PDFInfo
- Publication number
- CN108844259B CN108844259B CN201810829285.8A CN201810829285A CN108844259B CN 108844259 B CN108844259 B CN 108844259B CN 201810829285 A CN201810829285 A CN 201810829285A CN 108844259 B CN108844259 B CN 108844259B
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- Prior art keywords
- heat exchange
- evaporator
- exchange tube
- tube set
- fins
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D5/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation
- F28D5/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation in which the evaporating medium flows in a continuous film or trickles freely over the conduits
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Details Of Heat-Exchange And Heat-Transfer (AREA)
Abstract
The application provides an evaporator and an air conditioning unit. The evaporator comprises a shell, a liquid inlet, a gas outlet and a heat exchange tube set, wherein the liquid inlet and the gas outlet are arranged on the shell, and the heat exchange tube set is arranged in the shell and used for exchanging heat with a refrigerant. The heat exchange tube set is composed of a plurality of heat exchange tubes, and the heat exchange performance of fins of the heat exchange tubes is reduced from top to bottom in sequence. By applying the technical scheme of the invention, the high-performance heat exchange tube with high manufacturing cost can be more reasonably arranged according to the specific heat exchange requirement of the evaporator, and the overall manufacturing cost of the evaporator is reduced.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to an evaporator and an air conditioning unit.
Background
In air conditioning refrigeration systems, the pressure vessel is the primary element, such as the evaporator, condenser, oil separator, flash tank, etc. With the continuous development of the technical level, products with higher heat exchange capacity are more dominant and competitive under the condition of small price cost difference. Research on heat exchange capacity shows that the evaporator is greatly changed in technology, a dry evaporator, a flooded evaporator and a falling film evaporator exist in the prior shell-and-tube heat exchanger, and the falling film evaporator has considerable development from the perspective and rapid development in the industry.
However, the falling film evaporator still has a plurality of technical bottlenecks and also has great excavation potential in the heat exchange capacity. In order to ensure the heat exchange performance of the existing falling film evaporator, the complexity of the heat exchange tube is continuously upgraded so as to improve the heat exchange performance of the heat exchange tube. However, this increases the production costs of the falling film evaporator.
Disclosure of Invention
The embodiment of the invention provides an evaporator and an air conditioning unit, and aims to solve the technical problem that in the prior art, the cost is increased in order to ensure the heat exchange performance when the evaporator is used.
An embodiment of the present application provides an evaporator, including: a housing; the liquid inlet and the air outlet are arranged on the shell; the heat exchange tube set is arranged in the shell and used for exchanging heat with a refrigerant, the heat exchange tube set is composed of a plurality of heat exchange tubes, and the heat exchange performance of fins of the plurality of heat exchange tubes is reduced from top to bottom in sequence.
In one embodiment, the heat exchange tube group comprises a first heat exchange tube group and a second heat exchange tube group, the first heat exchange tube group is composed of a plurality of first heat exchange tubes, first fins are formed on the first heat exchange tubes, the second heat exchange tube group is composed of a plurality of second heat exchange tubes, second fins are formed on the second heat exchange tubes, the second heat exchange tube group is located below the first heat exchange tube group, and the heat exchange performance of the second fins is smaller than that of the first fins.
In one embodiment, the heat exchange tube set further includes a third heat exchange tube set, the third heat exchange tube set is composed of a plurality of third heat exchange tubes, third fins are formed on the plurality of third heat exchange tubes, the third heat exchange tube set is located below the second heat exchange tube set, and the heat exchange performance of the third fins is smaller than that of the second fins.
In one embodiment, the evaporator further comprises a liquid distributor disposed at an upper portion of the housing and corresponding to the liquid inlet, the liquid distributor being configured to distribute the refrigerant uniformly over the heat exchange tube set.
In one embodiment, the evaporator further comprises an overheating heat exchange tube set disposed at a lower portion within the case and below the second heat exchange tube set.
In one embodiment, the evaporator further comprises a first drying tube bank and a second drying tube bank, the first drying tube bank and the second drying tube bank being respectively distributed on both sides within the housing.
In one embodiment, four adjacent heat exchange tubes of the heat exchange tube set are in a rectangular distribution layout or a parallelogram distribution layout.
In one embodiment, adjacent four heat exchange tubes of the superheating heat exchange tube group and/or the first drying tube group and/or the second drying tube group are in a rectangular distribution layout or a parallelogram distribution layout.
In one embodiment, the evaporator is a falling film evaporator.
The application also provides an air conditioning unit, which comprises an evaporator, wherein the evaporator is the evaporator.
In the above embodiment, for the specific heat exchange requirement of the evaporator during the evaporation heat exchange, the heat exchange performance of the fins of the plurality of heat exchange tubes is sequentially reduced from top to bottom so as to adapt to the condition that the heat exchange requirement of the evaporator is gradually weakened from top to bottom. The heat exchange performance of the fin is basically reflected in the height and complexity of the fin, however, the higher the height and complexity of the fin is, the higher the manufacturing cost is. In the technical scheme of the invention, the heat exchange tube with higher manufacturing cost and better heat exchange performance corresponds to a higher position in the shell, and the heat exchange tube with lower manufacturing cost and lower heat exchange performance corresponds to a lower position in the shell. Therefore, the high-performance heat exchange tube with high manufacturing cost can be more reasonably arranged according to the specific heat exchange requirement of the evaporator, and the overall manufacturing cost of the evaporator is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic cross-sectional view of an embodiment of an evaporator according to the present invention;
fig. 2 is a schematic view showing the distribution of heat exchange tubes of the evaporator according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
Research finds that aiming at heat exchange research of the falling film evaporator, the heat exchange strength from top to bottom is different, the closer to the upper part of the falling film evaporator, the greater the heat exchange requirement is, and the higher the capacity requirement on a heat exchange tube is.
Based on the above research, it is found that in the technical solution of the present invention, as shown in fig. 1, the evaporator includes a housing 10, a liquid inlet 21, a gas outlet 22, and a heat exchange tube set, wherein the liquid inlet 21 and the gas outlet 22 are disposed on the housing 10, and the heat exchange tube set is disposed in the housing 10 and is used for exchanging heat with a refrigerant. The heat exchange tube set is composed of a plurality of heat exchange tubes, and the heat exchange performance of fins of the heat exchange tubes is reduced from top to bottom in sequence.
By applying the technical scheme of the invention, aiming at the specific heat exchange requirement of the evaporator during evaporation heat exchange, the heat exchange performance of the fins of the plurality of heat exchange tubes is sequentially reduced from top to bottom so as to adapt to the condition that the heat exchange requirement of the evaporator is gradually weakened from top to bottom. The heat exchange performance of the fin is basically reflected in the height and complexity of the fin, however, the higher the height and complexity of the fin is, the higher the manufacturing cost is. In the technical scheme of the invention, the heat exchange tube with higher manufacturing cost and better heat exchange performance corresponds to a higher position in the shell 10, and the heat exchange tube with lower manufacturing cost and lower heat exchange performance corresponds to a lower position in the shell 10. Therefore, the high-performance heat exchange tube with high manufacturing cost can be more reasonably arranged according to the specific heat exchange requirement of the evaporator, and the overall manufacturing cost of the evaporator is reduced.
As shown in fig. 1, as a preferred embodiment, the heat exchange tube set includes a first heat exchange tube set 31 and a second heat exchange tube set 32, the first heat exchange tube set 31 is composed of a plurality of first heat exchange tube sets 31, and a plurality of first heat exchange tubes are formed with first fins. The second heat exchange tube group 32 is composed of a plurality of second heat exchange tube groups 32 on which second fins are formed. The second heat exchange tube group 32 is located below the first heat exchange tube group 31, and the heat exchange performance of the second fins is smaller than that of the first fins. That is, the first heat exchange tube group 31 employs high-performance heat exchange tubes with high manufacturing costs, and the second heat exchange tube group 32 employs heat exchange tubes with lower manufacturing costs. More preferably, the heat exchange tube set further includes a third heat exchange tube set 33, the third heat exchange tube set 33 is composed of a plurality of third heat exchange tubes, third fins are formed on the plurality of third heat exchange tubes, the third heat exchange tube set 33 is located below the second heat exchange tube set 32, and the heat exchange performance of the third fins is smaller than that of the second fins. That is, the third heat exchange tube group 33 employs heat exchange tubes of lower manufacturing costs.
As shown in fig. 1, in the solution of the present embodiment, the evaporator further includes a liquid distributor 40, and the liquid distributor 40 is disposed at an upper portion of the housing 10 and corresponds to the liquid inlet 21. When the heat exchange tube set is used, the liquid distributor 40 is used for distributing liquid to the refrigerant so as to more uniformly drop the refrigerant onto the heat exchange tube set, and the heat exchange tube set can perform more uniform heat exchange.
More preferably, in the solution of the present embodiment, as shown in fig. 1, the evaporator further includes a superheated heat exchange tube set 50, and the superheated heat exchange tube set 50 is disposed at a lower portion in the casing 10 and below the second heat exchange tube set 32. In the process of using the evaporator, the refrigerant that is not gasified by the heat exchange tube set is accumulated at the lower part of the shell 10, and the overheating heat exchange tube set 50 at the lower part of the shell 10 exchanges heat with the part of the refrigerant, so that the part of the refrigerant is also evaporated into the gaseous refrigerant.
As shown in fig. 1, as a preferred embodiment, the evaporator further includes a first drying tube group 61 and a second drying tube group 62, and the first drying tube group 61 and the second drying tube group 62 are respectively distributed on both sides in the casing 10. By respectively arranging the first drying tube set 61 and the second drying tube set 62 at two sides in the casing 10, a drying process can be added to the air flow channel, so that the refrigerant is more fully gasified.
Optionally, a heat exchange tube bank is located between the first drying tube bank 61 and the second drying tube bank 62. Thus, the arrangement of the heat exchange pipes can be reasonably realized by utilizing the space in the shell 10.
As shown in fig. 2, optionally, the four adjacent heat exchange tubes of the heat exchange tube set are in a rectangular distribution layout or a parallelogram distribution layout, and the distribution form is not limited to the one shown in the figure, and other distribution forms are also possible. Similarly, the four adjacent heat exchange tubes of the superheating heat exchange tube bank 50, the first drying tube bank 61 and the second drying tube bank 62 are in a rectangular distribution layout or a parallelogram distribution layout, and the distribution is not limited to the one in the figure, and other distribution forms are also possible.
It should be noted that the evaporator solution described above is particularly suitable for use in a falling film evaporator. The first heat exchange tube group 31, the second heat exchange tube group 32, the third heat exchange tube group 33, and the superheating heat exchange tube group 50 may be large heat exchange tubes having the same diameter, or large heat exchange tubes having different diameters. The first drying tube group 61 and the second drying tube group 62 may be small heat exchange tubes having the same diameter or small heat exchange tubes having different diameters.
Specifically, if the first heat exchange tube set 31 is a 100% falling film evaporator tube according to the heat exchange energy efficiency, the second heat exchange tube set 32 and the third heat exchange tube set 33 are an 80% falling film evaporator tube and a 50% falling film evaporator tube, respectively. In the technical scheme of the invention, only a brief layout is given, and when the method is actually applied to production, the operation condition and the demand capacity of a unit need to be evaluated, and the functionality of the falling film evaporation tube is properly adjusted.
The invention also provides an air conditioning unit which comprises the evaporator. The air conditioning unit adopting the evaporator can more reasonably arrange the high-performance heat exchange tube with high manufacturing cost according to the specific heat exchange requirement of the evaporator, thereby reducing the overall manufacturing cost of the evaporator and further reducing the manufacturing cost of the air conditioning unit.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. An evaporator, comprising:
a housing (10);
a liquid inlet (21) and a gas outlet (22) which are arranged on the shell (10);
the heat exchange tube set is arranged in the shell (10) and used for exchanging heat with a refrigerant, the heat exchange tube set is composed of a plurality of heat exchange tubes, and the heat exchange performance of fins of the plurality of heat exchange tubes is sequentially reduced from top to bottom;
the evaporator further comprises a first drying tube bank (61) and a second drying tube bank (62), the first drying tube bank (61) and the second drying tube bank (62) being distributed on both sides within the shell (10), respectively.
2. An evaporator according to claim 1 wherein the heat exchange tube sets include a first heat exchange tube set (31) and a second heat exchange tube set (32), the first heat exchange tube set (31) being composed of a plurality of first heat exchange tubes having first fins formed thereon, the second heat exchange tube set (32) being composed of a plurality of second heat exchange tubes having second fins formed thereon, the second heat exchange tube set (32) being located below the first heat exchange tube set (31), the heat exchange performance of the second fins being smaller than that of the first fins.
3. An evaporator according to claim 2 wherein the heat exchange tube set further comprises a third heat exchange tube set (33), the third heat exchange tube set (33) being composed of a plurality of third heat exchange tubes having third fins formed thereon, the third heat exchange tube set (33) being located below the second heat exchange tube set (32), the heat exchange performance of the third fins being smaller than that of the second fins.
4. The evaporator as recited in claim 1, further comprising a liquid distributor (40), wherein the liquid distributor (40) is disposed at an upper portion of the inside of the housing (10) and corresponds to the liquid inlet (21), and the liquid distributor (40) is configured to uniformly distribute a refrigerant on the heat exchange tube set.
5. An evaporator according to claim 1 further comprising a bank of superheat heat exchange tubes (50), the bank of superheat heat exchange tubes (50) being disposed in a lower portion within the housing (10) and below the bank of heat exchange tubes.
6. An evaporator according to claim 1 wherein adjacent four heat exchange tubes of the heat exchange tube bank are in a rectangular or parallelogram arrangement.
7. An evaporator according to claim 5 wherein adjacent four heat exchange tubes of the superheating tube bank (50) and/or the first drying tube bank (61) and/or the second drying tube bank (62) are in a rectangular or parallelogram arrangement.
8. The evaporator according to any one of claims 1 to 7, wherein the evaporator is a falling film evaporator.
9. An air conditioning assembly comprising an evaporator, wherein the evaporator is as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810829285.8A CN108844259B (en) | 2018-07-25 | 2018-07-25 | Evaporator and air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810829285.8A CN108844259B (en) | 2018-07-25 | 2018-07-25 | Evaporator and air conditioning unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108844259A CN108844259A (en) | 2018-11-20 |
| CN108844259B true CN108844259B (en) | 2021-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810829285.8A Active CN108844259B (en) | 2018-07-25 | 2018-07-25 | Evaporator and air conditioning unit |
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| Country | Link |
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| CN (1) | CN108844259B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208720574U (en) * | 2018-07-25 | 2019-04-09 | 珠海格力电器股份有限公司 | Evaporator and air-conditioner set |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007198701A (en) * | 2006-01-30 | 2007-08-09 | Hitachi Zosen Corp | Evaporator for multiple effect type fresh water generator |
| CN202452766U (en) * | 2012-02-03 | 2012-09-26 | 特灵空调系统(中国)有限公司 | Improved falling film evaporator used in refrigeration air-conditioning system |
| US9541314B2 (en) * | 2012-04-23 | 2017-01-10 | Daikin Applied Americas Inc. | Heat exchanger |
| CN106322848B (en) * | 2015-06-30 | 2019-02-15 | 合肥海尔空调电子有限公司 | Flooded evaporator |
| CN107504721A (en) * | 2016-06-14 | 2017-12-22 | 青岛海尔智能技术研发有限公司 | Multilayer flooded evaporator and refrigeration, air-conditioning system |
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2018
- 2018-07-25 CN CN201810829285.8A patent/CN108844259B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208720574U (en) * | 2018-07-25 | 2019-04-09 | 珠海格力电器股份有限公司 | Evaporator and air-conditioner set |
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| CN108844259A (en) | 2018-11-20 |
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