CN104406324A - Improved two-stage ejection type refrigerating system - Google Patents
Improved two-stage ejection type refrigerating system Download PDFInfo
- Publication number
- CN104406324A CN104406324A CN201410783823.6A CN201410783823A CN104406324A CN 104406324 A CN104406324 A CN 104406324A CN 201410783823 A CN201410783823 A CN 201410783823A CN 104406324 A CN104406324 A CN 104406324A
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- Prior art keywords
- injector
- gas
- twin
- pressure
- refrigeration system
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Classifications
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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
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/08—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using ejectors
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
Abstract
The invention discloses an improved two-stage ejection type refrigerating system. The system comprises a condenser, wherein an output end of the condenser is divided into three ways, one way is connected with a first throttling valve, another way is connected with a pump, and the third way is sequentially connected with a second throttling valve, an evaporator and a first ejector; the output of a generator is divided into two ways, one way is connected with the first ejector, the other way is connected with a second ejector, and both the first ejector and the first throttling valve are connected with the second ejector. The system has the energy-saving effect, the required working gas volume from the generator is effectively decreased, the ejection rate is increased, the energy efficiency can be increased by about 10%, and the system is simple in structure, low in manufacturing cost and compact in structure.
Description
Technical field
The present invention relates to refrigeration technology field, particularly relate to a kind of twin-stage ejector refrigeration system of improvement.
Background technology
Spray type refrigerating is by a kind of Refrigeration Technique of heat-driven, can make full use of industrial exhaust heat, solar heat and other low-grade heat sources.Its mechanical energy consumed is little, and equipment is simple, reliable, with low cost.Its working media can be the environmental protection natural materials such as carbon dioxide, water, hydrocarbon.
But its shortcoming existed is that injector compression is smaller, and cryogenic temperature is higher; And it runs the impact being subject to back pressure, injection is smaller, and system energy efficiency is not high.
Application number 201210116545.X patent proposes " a kind of Auto-cascade jet type refrigerator ", its object adopting mixed working fluid and two injectors to realize compared with high pressure ratio, but complex structure, and object obtains lower cryogenic temperature; Application number 201210166460.2 proposes " a kind of two injection type cooling devices of gas-liquid ejector synergy ", and the method utilizes gas-liquid ejector to replace the action of expansion valve, is recovered in the demi-inflation merit of wasting in throttling process.
Application number 201310497335.4, patent name: " a kind of ejector type refrigerating machine with intermediate heat exchange member ", it is by adopting the intermediate heat exchange member such as economizer or subcooler, the gas-phase working medium in economizer or subcooler is made directly to enter the second injector, and do not need the second compression again by the first injector, thus reduce the load of the first injector, improve the coefficient of refrigerating performance of system under high condensation temperature with this.But adopt economizer or subcooler still to make system complex.And its two-stage ejector is gas ejector, less on the impact of inject ratio, limited to the improvement of injector operating condition.
Summary of the invention
For solving the deficiency that prior art exists, the invention discloses a kind of twin-stage ejector refrigeration system of improvement, utilize the gas-liquid two-phase fluid after condenser throttling to cool to the gas after first injector supercharging intensification, be inhaled into together in second injector after both mixing.Improve injector operation conditions on the one hand, can inject ratio be improved on the other hand.Simultaneously because segment fluid flow is directly compressed to condensing pressure from pressure after throttling, save the work gas scale of construction needed for first injector, improve efficiency.
For achieving the above object, concrete scheme of the present invention is as follows:
A kind of twin-stage ejector refrigeration system of improvement, comprise condenser, condenser output divides three tunnels, one tunnel is connected with first throttle valve, and another road is connected with pump, and the 3rd tunnel is connected with second throttle, evaporimeter and the first injector successively, the output of described generator divides two-way, one tunnel is connected with the first injector, and another road is connected with the second injector, and described first injector and first throttle valve are all connected with the second injector.
Described second injector is vehicle repair major injector.Described second injector output is provided with temperature sensor and pressure sensor, and temperature sensor is all connected with controller with pressure sensor and first throttle valve.
The temperature signal that described controller detects according to temperature sensor and pressure sensor and pressure signal and setting value compare, then controller sends instruction as required, control the aperture of first throttle valve, thus control the size of spouting liquid, keep the second injector outlet temperature and pressure in setting range.
Draw a bye-pass from condensator outlet and be connected to first throttle valve, condensed fluid pressure and temperature after the throttling of first throttle valve all reduces, become gas-liquid two-phase fluid, this fluid and the mixed gases after the first injector supercharging, cooling gas, is still biphase gas and liquid flow after both mixing.
The gas-liquid two-phase fluid formed after mixing is aspirated at b place by the second injector again, gas from generator carries out supercharging to this biphase gas and liquid flow, own temperature and pressure also reduce simultaneously, enter into condenser after both mixing from outlet c place's outflow of the second injector.
Beneficial effect of the present invention:
The present invention has energy-saving effect, because segment fluid flow is directly compressed to condensing pressure from the pressure after energy-conservation, can save the work gas scale of construction needed for first injector, improves system energy efficiency; Phase form in the past in addition, the second injector of the present invention is gas-liquid two-phase injector, and its Secondary Flow is biphase gas and liquid flow, and the inject ratio of gas ejector adopted than ever greatly increases; Its comprehensive function can make system COP increase about 10%.Compare and adopt subcooler or economizer to carry out intercooled form in the past, adopt throttle-valve structure simple, small volume, compares subcooler or economizer equal-volume can reduce 50%, space is arranged compacter, and cost can reduce by 10%.Subcooler or economizer line system complex, poor reliability, and adopt choke valve only to have two pipelines, system reliability improves.
Accompanying drawing explanation
Fig. 1 the first twin-stage ejector refrigeration system structured flowchart improved of the present invention;
In figure, 1-generator; 2-injector; 3-injector; 4-condenser; 5-controller; 6-choke valve; 7-evaporimeter; 8-choke valve, 9-pump
Detailed description of the invention:
Below in conjunction with accompanying drawing, the present invention is described in detail:
As shown in Figure 1, the inject ratio that the present invention is intended to solve the existence of existing twin-stage ejector refrigeration system is little, and efficiency is low, and the problem that in the middle of injector, Secondary Flow inlet temperature is high, to improve inject ratio and system energy efficiency.
A kind of twin-stage ejector refrigeration system of improvement, comprise condenser 4, condenser 4 output divides three tunnels, one tunnel is connected with choke valve 6, and another road is connected with pump 9, and the 3rd tunnel is connected with choke valve 8, evaporimeter 7 and injector 2 successively, the output of described generator 1 divides two-way, one tunnel is connected with injector 2, and another road is connected with injector 3, and described injector 2 and choke valve 6 are all connected with injector 3.
Operation principle: the present invention exports extraction one bye-pass from condenser 4 and is connected to choke valve 6, condensed fluid pressure and temperature after choke valve 6 throttling all reduces, become gas-liquid two-phase fluid, mixed gases after this fluid and blowing emitter 2 supercharging, cooling gas, is still biphase gas and liquid flow after both mixing.The gas-liquid two-phase fluid that this mixing is formed afterwards more injected device 3 aspirates at b place, working gas from generator 1 carries out supercharging to this biphase gas and liquid flow, own temperature and pressure also reduce simultaneously, and outlet c place's outflow that both mix rear blowing emitter 3 enters into condenser.The useful effect of employing choke valve 6 is: the temperature that can reduce the gas after injector 2, forms biphase gas and liquid flow, thus can increase the inject ratio of injector 3, improve the service condition of injector 3; Simultaneously because segment fluid flow is directly compressed to intermediate pressure from pressure after throttling, save the work gas scale of construction needed for first injector, thus decrease the heat that generator needs, improve the efficiency of whole system.
During control, wherein choke valve 6 is electric expansion valve, it is connected to controller 5, injector 3 exports c place temperature sensor and pressure sensor, respectively access controller 5, and controller 5 compares according to temperature signal and pressure signal and setting value, then instruction is sent as required, control the aperture of choke valve 6, thus control the size of spouting liquid, keep injector 3 outlet temperature and pressure in setting range.Utilize this kind of control model that injector 3 can be avoided to occur the situation that work is not normal, and system can be made to run close under design conditions, improve system run all right and efficiency.
Wherein, second injector 3 is gas-liquid two-phase injector, relative to gas-phase injection device, significantly can increase and spray ratio.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (6)
1. the twin-stage ejector refrigeration system improved, it is characterized in that, comprise condenser, condenser output divides three tunnels, and a road is connected with first throttle valve, another road is connected with pump, 3rd tunnel is connected with second throttle, evaporimeter and the first injector successively, and the output of described generator divides two-way, and a road is connected with the first injector, another road is connected with the second injector, and described first injector and first throttle valve are all connected with the second injector.
2. the twin-stage ejector refrigeration system of a kind of improvement as claimed in claim 1, is characterized in that, described second injector is vehicle repair major injector.
3. the twin-stage ejector refrigeration system of a kind of improvement as claimed in claim 1, is characterized in that, described second injector output is provided with temperature sensor and pressure sensor, and temperature sensor is all connected with controller with pressure sensor and first throttle valve.
4. the twin-stage ejector refrigeration system of a kind of improvement as claimed in claim 3, it is characterized in that, the temperature signal that described controller detects according to temperature sensor and pressure sensor and pressure signal and setting value compare, then controller sends instruction as required, control the aperture of first throttle valve, thus control the size of spouting liquid, keep the second injector outlet temperature and pressure in setting range.
5. the twin-stage ejector refrigeration system of a kind of improvement as claimed in claim 1, it is characterized in that, draw a bye-pass from condensator outlet and be connected to first throttle valve, condensed fluid pressure and temperature after the throttling of first throttle valve all reduces, become gas-liquid two-phase fluid, this fluid and the mixed gases after the first injector supercharging, cool gas, is still biphase gas and liquid flow after both mixing.
6. the twin-stage ejector refrigeration system of a kind of improvement as claimed in claim 5, it is characterized in that, the gas-liquid two-phase fluid formed after mixing is aspirated at b place by the second injector again, gas from generator carries out supercharging to this biphase gas and liquid flow, own temperature and pressure also reduce simultaneously, enter into condenser after both mixing from outlet c place's outflow of the second injector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410783823.6A CN104406324B (en) | 2014-12-16 | 2014-12-16 | Improved two-stage ejection type refrigerating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410783823.6A CN104406324B (en) | 2014-12-16 | 2014-12-16 | Improved two-stage ejection type refrigerating system |
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| CN104406324A true CN104406324A (en) | 2015-03-11 |
| CN104406324B CN104406324B (en) | 2017-01-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042741A (en) * | 2015-07-07 | 2015-11-11 | 同济大学 | Jet refrigeration and active cooling beam combined applying system |
| CN107014107A (en) * | 2017-05-09 | 2017-08-04 | 上海海洋大学 | A kind of novel wind power drives ejector refrigeration system |
| CN115406131A (en) * | 2022-08-31 | 2022-11-29 | 华能国际电力股份有限公司 | Hydrothermal and cogeneration system based on ejector and operation method |
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| JP2005172314A (en) * | 2003-12-09 | 2005-06-30 | Osaka Gas Co Ltd | Refrigeration unit |
| CN101387457A (en) * | 2008-10-27 | 2009-03-18 | 中原工学院 | Multi-injector parallel connection type solar injection cooling device |
| CN101603749A (en) * | 2009-07-07 | 2009-12-16 | 河南科技大学 | A kind of auto-cascade injection low-temperature refrigeration circulating device |
| JP2011094814A (en) * | 2009-10-27 | 2011-05-12 | Mitsubishi Electric Corp | Refrigerating cycle device and refrigerant compressing method |
| CN102230702A (en) * | 2011-06-03 | 2011-11-02 | 浙江大学 | Two-stage ejection refrigeration cycle system with economizer |
| CN102853578A (en) * | 2012-04-19 | 2013-01-02 | 浙江大学 | Mixed working medium two-stage jet type refrigerating machine |
| CN103528263A (en) * | 2013-10-21 | 2014-01-22 | 浙江大学宁波理工学院 | Injection type refrigerating machine with middle heat exchanging part |
| CN204460827U (en) * | 2014-12-16 | 2015-07-08 | 山东大学 | A kind of twin-stage ejector refrigeration system of improvement |
-
2014
- 2014-12-16 CN CN201410783823.6A patent/CN104406324B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005172314A (en) * | 2003-12-09 | 2005-06-30 | Osaka Gas Co Ltd | Refrigeration unit |
| CN101387457A (en) * | 2008-10-27 | 2009-03-18 | 中原工学院 | Multi-injector parallel connection type solar injection cooling device |
| CN101603749A (en) * | 2009-07-07 | 2009-12-16 | 河南科技大学 | A kind of auto-cascade injection low-temperature refrigeration circulating device |
| JP2011094814A (en) * | 2009-10-27 | 2011-05-12 | Mitsubishi Electric Corp | Refrigerating cycle device and refrigerant compressing method |
| CN102230702A (en) * | 2011-06-03 | 2011-11-02 | 浙江大学 | Two-stage ejection refrigeration cycle system with economizer |
| CN102853578A (en) * | 2012-04-19 | 2013-01-02 | 浙江大学 | Mixed working medium two-stage jet type refrigerating machine |
| CN103528263A (en) * | 2013-10-21 | 2014-01-22 | 浙江大学宁波理工学院 | Injection type refrigerating machine with middle heat exchanging part |
| CN204460827U (en) * | 2014-12-16 | 2015-07-08 | 山东大学 | A kind of twin-stage ejector refrigeration system of improvement |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042741A (en) * | 2015-07-07 | 2015-11-11 | 同济大学 | Jet refrigeration and active cooling beam combined applying system |
| CN105042741B (en) * | 2015-07-07 | 2018-06-29 | 同济大学 | Ejector refrigeration and active beam-cooling use in conjunction system |
| CN107014107A (en) * | 2017-05-09 | 2017-08-04 | 上海海洋大学 | A kind of novel wind power drives ejector refrigeration system |
| CN115406131A (en) * | 2022-08-31 | 2022-11-29 | 华能国际电力股份有限公司 | Hydrothermal and cogeneration system based on ejector and operation method |
| CN115406131B (en) * | 2022-08-31 | 2023-11-28 | 华能国际电力股份有限公司 | Water-heat cogeneration system based on ejector and operation method |
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| CN104406324B (en) | 2017-01-25 |
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