CN204176965U - A kind of falling film evaporator - Google Patents
A kind of falling film evaporator Download PDFInfo
- Publication number
- CN204176965U CN204176965U CN201420484538.XU CN201420484538U CN204176965U CN 204176965 U CN204176965 U CN 204176965U CN 201420484538 U CN201420484538 U CN 201420484538U CN 204176965 U CN204176965 U CN 204176965U
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- CN
- China
- Prior art keywords
- distributor
- allocated equipment
- main allocated
- secondary distributor
- conduit
- 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.)
- Expired - Fee Related
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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
- F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
- F25B2341/001—Ejectors not being used as compression device
- F25B2341/0011—Ejectors with the cooled primary flow at reduced or low pressure
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model relates to a kind of falling film evaporator, it comprises refrigerant distributor, expansion valve and heat exchanger tube, described heat exchanger tube is arranged on below refrigerant distributor, it is characterized in that, described refrigerator distributor comprises main allocated equipment and secondary distributor, main allocated equipment and secondary distributor orthogonal, described main allocated equipment is communicated with expansion valve fluid, circulation canal is equipped with in main allocated equipment and secondary distributor, described circulation canal entrance is provided with suction nozzle, multiple outlet is provided with in the circulation canal of described main allocated equipment, main allocated equipment and secondary distributor are by described outlet, described heat exchanger tube is arranged on below secondary distributor.The utility model carries out uniform distribution by main allocated equipment and secondary distributor to two phase refrigerant, improve heat transfer efficiency, and structure is simple; Circulated in main allocated equipment and secondary distributor by suction nozzle auxiliary refrigerant, make cold-producing medium evenly.
Description
Technical field
The utility model relates to a kind of falling film evaporator.
Background technology
As far back as 1848, horizontal pipe falling film evaporation technology was just born, but until the nineties in 20th century, along with progressively eliminating of fluorochlorohydrocarbon, just starts to be used in refrigeration system.Downward film evaporator utilizes refrigerant pipe to evaporate the object reached with intraductal working medium heat exchange outward, and namely coolant media refrigerant liquid of flowing through outside evaporation Bottomhole pressure and evaporation tube carries out heat exchange, makes it evaporate to realize the transmission of heat.
Falling film evaporator is made up of liquid distributor, evaporation tube, oil return system and steam (vapor) outlet.Enter liquid distributor by the refrigerating agent containing oil after expansion gear, it does not have to be assigned on evaporation tube when pressure support ventilation by liquid distributor equably, and forms thin film on evaporation tube.Conducted heat by film, the cold-producing medium outside evaporation tube and the cold water in evaporation tube carry out heat exchange, and cold-producing medium is evaporated under certain evaporating temperature.Oil containing high concentration in unevaporated cold-producing medium, they form liquid pool along pipe drainage to base of evaporator, and the oil return opening of compressor is transported to by certain rule, and the refrigerant vapour that evaporation produces flows out evaporimeter by not having resistant steam channel, and get back to the air entry of compressor, complete a working cycles.
Cold-producing medium becomes gas-fluid two-phase mixture after expansion gear, is difficult to direct distribution.Therefore have in systems in which and set up gas-liquid separation device and do not set up gas-liquid separation device two kinds of situations: set up complexity and initial cost that gas-liquid separation device can increase system, but what enter evaporimeter after being separated is single-phase liquid, and carrying out uniform distribution ratio to it is easier to; Not setting up gas-liquid separation device can make system complexity and initial cost reduce, but becomes difficulty to the uniform distribution of two-phase refrigerant mixture, needs the liquid distributor structure that design is complicated.The uniformity coefficient of cold-producing medium distribution is directly determined to the heat transfer property of evaporimeter, the distribution of uniformity can make liquid film relatively uniform, improves heat transfer coefficient; And maldistribution can be lowered into film quality greatly, even can make part evaporation tube " drying ", reduce system effectiveness.
Utility model content
The utility model is in order to solve the problem of prior art, provide one and do not need gas-liquid separation device, and the falling film evaporator of gas-liquid two-phase cold-producing medium uniform distribution can be enable, it comprises refrigerant distributor, expansion valve and heat exchanger tube, described heat exchanger tube is arranged on below refrigerant distributor, it is characterized in that, described refrigerator distributor comprises main allocated equipment and secondary distributor, main allocated equipment and secondary distributor orthogonal, described main allocated equipment is communicated with expansion valve fluid, circulation canal is equipped with in main allocated equipment and secondary distributor, described circulation canal entrance is provided with suction nozzle, multiple outlet is provided with in the circulation canal of described main allocated equipment, main allocated equipment and secondary distributor are by described outlet, described heat exchanger tube is arranged on below secondary distributor.
It is below attached technical scheme of the present utility model.
Preferably, the circulation canal of described main allocated equipment comprises first passage and second channel, and first passage and second channel are parallel to each other, and first passage is communicated with by bend with second channel.
Preferably, described outlet is arranged in first passage, and Way out is perpendicular to first passage.
Preferably, the circulation canal of described secondary distributor comprises the first conduit and the second conduit, and the first conduit and the second conduit are parallel to each other, and the first conduit is communicated with by kink with the second conduit.
Preferably, described first conduit bottom surface is provided with multiple opening, and described opening extends in the second conduit.
Preferably, described secondary distributor is distributed in main allocated equipment both sides.
Advantageous Effects of the present utility model: the utility model carries out uniform distribution by main allocated equipment and secondary distributor to two phase refrigerant, improve heat transfer efficiency, and structure is simple; Circulated in main allocated equipment and secondary distributor by suction nozzle auxiliary refrigerant, make cold-producing medium evenly.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model embodiment falling film evaporator.
Fig. 2 is the schematic diagram of the utility model embodiment main allocated equipment.
Fig. 3 is the schematic diagram of the secondary distributor of the utility model embodiment.
In figure: refrigerant distributor 10, falling film evaporator 11, root heat exchanger tube 12, support 13, compressor 16, main allocated equipment 17, secondary distributor 18, upstream portion 19, expansion valve 21, main suction nozzle 22, first passage 23, bend 24, second channel 26, outlet 27, downstream 29, the first conduit 31, second conduit 32, kink 33, secondary suction nozzle 34, first end 36, upper surface 42, lower surface 43.
Detailed description of the invention
As shown in Figure 1 to Figure 2, the falling film evaporator 11 of the present embodiment comprises refrigerant distributor 10 and Duo Gen heat exchanger tube 12, and heat exchanger tube 12 is supported by support 13.Between described heat exchanger tube 12, fluid is communicated with.Described evaporimeter 11 top is provided with compressor 16, and it is communicated with evaporimeter 11 upper flow, and compressor makes cold-producing medium produce circulation.Described refrigerant distributor 10 comprises main allocated equipment 17 and secondary distributor 18, and be provided with main allocated equipment 17 above described heat exchanger tube 12, main allocated equipment 17 is approximately perpendicular to heat exchanger tube 12.Main allocated equipment 17 is communicated with multiple secondary distributor 18 fluid being parallel to heat exchanger tube 12.Described secondary distributor 18 is distributed in main allocated equipment 17 both sides, and is oppositely arranged.Described main allocated equipment 17 is communicated with expansion valve 21 by upstream portion 19.Main suction nozzle 22 is provided with in described upstream portion 19, main suction nozzle 22 can to entering the fluid refrigerant step-down of main allocated equipment 17 and raising speed, namely be similar to nozzle, promote cold-producing medium by main allocated equipment 17, it can assist the fluid circulation kept in main allocated equipment 7 simultaneously.Main allocated equipment 17 comprises first passage 23 and second channel 26, and first passage 23 is parallel to second channel 26, is communicated with between first passage 23 and second channel 26 by bend 24.Be provided with multiple outlet 27 in described first passage 23, outlet 27 is communicated with secondary distributor 18.Two phase refrigerant flows into first passage 23 by upstream extremity 19, and the uniform refrigerant in first passage 23 must flow into secondary distributor 18 by multiple outlet 27.The cold-producing medium do not flowed out by outlet 27 enters second channel 26, the downstream 29 of second channel 26 is communicated with suction nozzle 22 by the first tube connector 28, make the cold-producing medium in second channel 26 again enter first passage 23 by main suction nozzle 22, thus form the circulation of cold-producing medium.This circulation contributes to keeping uniform cold-producing medium gas/liquid to mix, thus contributes to its uniform distribution to secondary distributor 18.
As shown in Figure 3, secondary distributor 18 comprises the first conduit 31 and the second conduit 32, first conduit 31 is communicated with by kink 33 with the second conduit 32.Secondary suction nozzle 34 is arranged on first end 36, and first end 36 is positioned at the first conduit 31 upstream.The downstream of shown second conduit 32 is provided with the second end 38, and the second end 38 is communicated with secondary suction nozzle 34 by the second tube connector 37.Therefore, two phase refrigerant can form circulation in secondary distributor.Be provided with multiple opening 39 in described secondary distributor 18, opening 39 is arranged on the bottom surface 41 of the first conduit 31, and opening 39 makes to enter the second conduit 32 by the upper surface 42 of the second conduit 32 by the cold-producing medium dropped on bottom surface 41 of the first conduit 31.Be heat exchanger tube 12 below the lower surface 43 of described second conduit 32.In figure, arrow represents flow of refrigerant direction.
The present embodiment carries out uniform distribution by main allocated equipment 17 and secondary distributor 18 pairs of two phase refrigerant, improve heat transfer efficiency, and structure is simple; Circulated in main allocated equipment and secondary distributor by suction nozzle auxiliary refrigerant, make cold-producing medium evenly.It is to be noted; above-mentioned preferred embodiment is only and technical conceive of the present utility model and feature is described; its object is to person skilled in the art can be understood content of the present utility model and implement according to this, protection domain of the present utility model can not be limited with this.All equivalences done according to the utility model Spirit Essence change or modify, and all should be encompassed within protection domain of the present utility model.
Claims (6)
1. a falling film evaporator, comprise refrigerant distributor, expansion valve and heat exchanger tube, described heat exchanger tube is arranged on below refrigerant distributor, it is characterized in that, described refrigerator distributor comprises main allocated equipment and secondary distributor, main allocated equipment and secondary distributor orthogonal, described main allocated equipment is communicated with expansion valve fluid, circulation canal is equipped with in main allocated equipment and secondary distributor, described circulation canal entrance is provided with suction nozzle, multiple outlet is provided with in the circulation canal of described main allocated equipment, main allocated equipment and secondary distributor are by described outlet, described heat exchanger tube is arranged on below secondary distributor.
2. falling film evaporator as claimed in claim 1, is characterized in that: the circulation canal of described main allocated equipment comprises first passage and second channel, and first passage and second channel are parallel to each other, and first passage is communicated with by bend with second channel.
3. falling film evaporator as claimed in claim 2, is characterized in that: described outlet is arranged in first passage, and Way out is perpendicular to first passage.
4. falling film evaporator as claimed in claim 1, is characterized in that: the circulation canal of described secondary distributor comprises the first conduit and the second conduit, and the first conduit and the second conduit are parallel to each other, and the first conduit is communicated with by kink with the second conduit.
5. falling film evaporator as claimed in claim 4, is characterized in that: described first conduit bottom surface is provided with multiple opening, and described opening extends in the second conduit.
6. falling film evaporator as claimed in claim 1, is characterized in that: described secondary distributor is distributed in main allocated equipment both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420484538.XU CN204176965U (en) | 2014-08-22 | 2014-08-22 | A kind of falling film evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420484538.XU CN204176965U (en) | 2014-08-22 | 2014-08-22 | A kind of falling film evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204176965U true CN204176965U (en) | 2015-02-25 |
Family
ID=52565773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420484538.XU Expired - Fee Related CN204176965U (en) | 2014-08-22 | 2014-08-22 | A kind of falling film evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204176965U (en) |
-
2014
- 2014-08-22 CN CN201420484538.XU patent/CN204176965U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160122 Address after: 231300 Langxi Economic Development Zone, Anhui, Xuancheng Patentee after: Anhui Zhongsheng environmental Limited by Share Ltd Address before: 511, room 03, building 1369, 211100 Garden Road, Nanjing Science Park, Jiangning District, Jiangsu, China Patentee before: NANJING TIANJIA CHEMICAL MACHINERY CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150225 Termination date: 20200822 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |