CN100561072C - Make the refrigerating method and the refrigeration system thereof that are lower than the following low-temperature receiver of freezing point of main refrigerant - Google Patents
Make the refrigerating method and the refrigeration system thereof that are lower than the following low-temperature receiver of freezing point of main refrigerant Download PDFInfo
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- CN100561072C CN100561072C CNB200810020687XA CN200810020687A CN100561072C CN 100561072 C CN100561072 C CN 100561072C CN B200810020687X A CNB200810020687X A CN B200810020687XA CN 200810020687 A CN200810020687 A CN 200810020687A CN 100561072 C CN100561072 C CN 100561072C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Abstract
A kind of refrigerating method and refrigeration system thereof that is lower than the following low-temperature receiver of freezing point of main refrigerant that make belongs to liquid sweat cooling technical field.These method and system are characterised in that: refrigeration working medium is made up of main refrigerant and auxiliary refrigerant in the evaporimeter, main refrigerant is a phase change refrigerant, auxiliary refrigerant is for mixing with main refrigerant but do not participate in the solid-state cold-producing medium of phase transformation, and wherein said solid-state cold-producing medium can reduce the freezing point of described phase change refrigerant; Utilize the anti-icing control valve of throttling that is installed between condenser and the evaporimeter simultaneously, water temperature was pressed in more than the freezing point of main refrigerant temperature after the employing negative-feedback controlled throttling assurance throttling automatically, in case main refrigerant freezes.As a kind of new Refrigeration Technique, broken the restriction of refrigeration working medium three-phase equilibrium point temperature; Make the scope of application of cold-producing medium that bigger expansion arranged.
Description
Technical field
Refrigerating method and the refrigeration system thereof that is lower than the following low-temperature receiver of freezing point of main refrigerant that make of the present invention belongs to liquid sweat cooling technical field.
Background technology
At present, liquid sweat cooling technology comprises Refrigeration Techniques such as steam compression type refrigeration technology, sorption type refrigerating technology, steam-sprayed Refrigeration Technique, adsorptive refrigeration technology, and its characteristics are freezed as refrigerating capacity for utilizing cold-producing medium (working medium) to be vaporized into the needed phase transition energy of steam state by liquid state under low-temp low-pressure.This Refrigeration Technique is as the Refrigeration Technique that is most widely used at present, domestic air conditioning, refrigerator, commercial central air-conditioning; Temperature required control spaces, field such as industry, national defence are all as main flow Refrigeration Technique performance significant role.Wherein the effect of refrigeration working medium is most crucial, generally speaking, corresponding some the special cold-producing medium of certain temperature controlling range, a lot of outstanding cold-producing mediums are subjected to the restriction of its Engineering Thermophysics character, its cryogenic temperature is limited in scope, and wherein vapour, liquid, solid three-phase equilibrium point restriction are difficult to break through.How further to reduce present various refrigeration system cold-producing medium sink temperatures is directions that the present technique field studies for a long period of time.As water is the most cheap, the natural environmental-protective cold-producing medium of easy acquisition, have density little, safe and harmless, to equipment advantage such as non-corrosiveness almost.Though water has the big advantage of specific heat, but the freezing point height of water, so water only can be as the low-temperature receiver of making more than 0 ℃, cryogenic temperature is more than 5 ℃ generally speaking, lithium-bromide absorption-type refrigerating machine (water be wherein one of working medium) is as the mainstream model of present big-and-middle-sized air conditioner refrigerating, the middle-size and small-size machine of forward extends at present, the cryogenic temperature of " more than 5 ℃ ", the range of application that bromizates the lithium Absorption Refrigerator is restricted, how to solve lithium-bromide absorption-type refrigerating machine and under the evaporating temperature below the zero centigrade, work, become the key problem in technology that it enlarges range of application.
Summary of the invention
The object of the present invention is to provide a kind of refrigerating method and refrigeration system thereof that is lower than cold-producing medium low-temperature receiver below freezing that make.
A kind of refrigerating method that is lower than cold-producing medium low-temperature receiver below freezing that makes, utilizing cold-producing medium to be vaporized into the needed phase transition energy of steam state by liquid state under low-temp low-pressure freezes as refrigerating capacity, it is characterized in that: refrigeration working medium is made up of main refrigerant and auxiliary refrigerant in the evaporimeter, main refrigerant is a phase change refrigerant, auxiliary refrigerant is for mixing with main refrigerant but do not participate in the solid-state cold-producing medium of phase transformation, and wherein said solid-state cold-producing medium can reduce the freezing point of described phase change refrigerant; Utilize the anti-icing control valve of throttling that is installed between condenser and the evaporimeter simultaneously, water temperature is more than the freezing point of main refrigerant temperature after adopting negative-feedback to control throttling assurance throttling automatically, in case main refrigerant freezes, concrete mode is that the anti-icing control valve of throttling is by being installed on the temperature and pressure sensor thermometric at evaporator inlet place, guarantee that the main refrigerant temperature that enters evaporimeter is not less than freezing point, after evaporator inlet place temperature is near or below preset temperature, the orifice of the anti-icing control valve of throttling increases, temperature recovery.
A kind of refrigeration system that is lower than cold-producing medium low-temperature receiver below freezing that makes, comprise evaporimeter, condenser, it is characterized in that: refrigeration working medium is made up of main refrigerant and auxiliary refrigerant in the described evaporimeter, main refrigerant is a phase change refrigerant, auxiliary refrigerant is for mixing with main refrigerant but do not participate in the solid-state cold-producing medium of phase transformation, and wherein auxiliary refrigerant can reduce the freezing point of main refrigerant; Pipeline is provided with the anti-icing control valve of throttling between described condenser and the evaporimeter; The anti-icing control valve of throttling is by being installed on the temperature and pressure sensor thermometric at evaporator inlet place, guarantee that the main refrigerant temperature that enters evaporimeter is not less than freezing point, after evaporator inlet place temperature is near or below preset temperature, the orifice of the anti-icing control valve of throttling increases, temperature recovery, other the time then by normal regulating rule operation.
As a kind of new Refrigeration Technique, broken the restriction of refrigeration working medium three-phase equilibrium point temperature; Make the scope of application of cold-producing medium that bigger expansion arranged; The once great theory and technology that is liquid sweat cooling technology (comprising Refrigeration Techniques such as steam compression type refrigeration technology, sorption type refrigerating technology, steam-sprayed Refrigeration Technique, adsorptive refrigeration technology) breaks through, and has bigger theoretical real value.
Description of drawings
Fig. 1 is a system schematic of the present invention.
Fig. 2 is a circularly cooling principle pressure-enthalpy chart of the present invention.
Fig. 3 is one of embodiment of the present invention: duplexing matter steam-jet refrigerating system.
Fig. 4 is two: three working medium absorption systems of embodiment of the present invention.
Number in the figure title: the anti-icing control valve 5-of 1-evaporimeter 2-raise steam device 3-condenser 4-throttling steam generator 6-steaming device injector 7-condensate pump 8-refrigerant 9-water as refrigerant 10-working steam 11-bromize lithium concentrated solution 12-generator 13-salt solution 14-cooling water 15-bromize lithium dilute solution 16-absorber 17-heat exchanger 18-evaporimeter pump 19-absorber 20-generator pump
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 shows the groundwork circulation of auxiliary refrigerant refrigerating method and system.Send into raise steam device 2 from the main refrigerant low pressure gas of evaporimeter 1.Just enter condenser 3 after the pressurization in raise steam device 2, the water quench in device 3 tube bundles of being condensed is condensed into highly pressurised liquid, have certain liquid level after, high pressure liquid refrigerant just flow in the evaporimeter 1 along the anti-icing control valve 4 of throttling.Because the pressure in the pressure ratio condenser in the evaporimeter is low, is example with water as the main refrigerant lithium-bromide absorption-type refrigerating machine, during as 45 ℃ of condensation temperatures, condensing pressure is 9580Pa; When the evaporating temperature of lithium-bromide absorption-type refrigerating machine was 5 ℃ at present, evaporating pressure was 872Pa, for water, reduced evaporating temperature again as desiring, and then might make coolant-icing, caused thrashing.In order to prevent to freeze, the anti-icing control valve 4 of throttling should guarantee that the upper temp that enters evaporimeter 1 is not less than in 0 ℃, be generally 3～5 ℃, the temperature and pressure sensor of the anti-icing control valve of throttling be installed on the anti-icing control valve of throttling 4 and the tube connector of evaporimeter 1 evaporimeter 1 the porch, promptly when evaporimeter 3 the porch temperature be near or below design temperature after, the orifice of the anti-icing control valve 4 of throttling increases, temperature recovery, other the time then by the operation of normal regulating rule.
Condensate water becomes superheated water behind anti-icing control valve 4 expenditure and pressures of throttling, therefore wherein part water evaporates voluntarily, because water evaporates needed heat and can only draw from the water that all the other are not vaporized, the result reduces the water temperature of remainder, refrigerant (water or other refrigerating mediums that this part has been cooled, be positioned at the top of evaporimeter) be transported to the user who uses cold, Returning evaporimeter after endothermic temperature raises.Equally, the superheated water that a part forms because of the anti-icing control valve 4 throttling step-downs of throttling evaporates heat absorption voluntarily, and its heat is taken from superheated water self, becomes saturation water so all the other superheated waters of not vaporizing are lowered the temperature because of heat is sucked away, and obtains cooling again.Come down to a steam-water separator as above-mentioned evaporimeter, it will be separated from the steam water interface after the throttling, because the evaporation voluntarily of salt solution that throttling process causes is to carry out in working medium inside.Because working medium is evaporated the low temperature and low pressure steam that is produced voluntarily and is constantly absorbed by bromize lithium concentrated solution, thus the vacuum in the evaporimeter can remain unchanged, thereby realized process of refrigerastion.Because the freezing point of salt (sodium chloride or calcium chloride etc. are as auxiliary refrigerant) water can be lower than 0 ℃, the condensed water that enters evaporimeter 1 is positioned at its bottom, refrigerant (water or other refrigerating mediums) is positioned at the top of evaporimeter, utilizes its difference in height, can realize through the choke valve evaporating pressure P that reduces pressure
0After enter the bottom of evaporimeter temperature be higher than 0 ℃, the upper temp of evaporimeter is lower than in 0 ℃ (as-10 ℃, evaporating pressure is 259Pa), successively decreases along the temperature of evaporimeter height, has solved the stifled problem of ice of choke valve.
After cold-producing medium water enters evaporimeter 1, because pressure reduces, and mix with salt solution in the evaporimeter, part salt solution start vaporizer, but because evaporimeter 1 can be a spray type heat exchanger, spray liquid has a certain amount of requirement, so most of cryogen salt solution then accumulates in the water pond earlier, it is sent in the shower of evaporimeter with pump with the cold-producing medium salt solution that is several times as much as evaporation capacity then, be spread across on the tube bundle through nozzle, salt solution just evaporates heat absorption, and the water in the evaporation tube is emitted heat and is cooled to required temperature, the refrigerant (making refrigerating medium) that becomes production technology or idle call is delivered to the user, and recycles it.
Theory analysis: Fig. 2. auxiliary refrigerant refrigerating method and system's refrigeration principle pressure-enthalpy chart have reflected the thermodynamic principles of this kind of refrigeration cycle, the thermodynamic parameter of each some corresponding diagram 1 parts, the theoretical foundation of technology for this reason among the figure.General liquid sweat cooling circulation be 1 '-2-3-4 '-1 ', in the top of freezing point line (shown in the dotted line), lower limit (minimum evaporating temperature) is the freezing point line; The lower limit of the sweat cooling circulation of auxiliary refrigerant kind of refrigeration cycle can be 1-2-3-4-1 below the freezing point line but, and this is the contribution of the present invention to Refrigeration Technique.Can fill up the blank of refrigeration thermodynamic cycle.
Circulation heating power calculates:
Unit mass refrigerating capacity q
0=h
1-h
4(main refrigerant+auxiliary refrigerant)
Condensation heat dissipation capacity q
k=h
2-h
3(main refrigerant)
Energy input w=h
2-h
1(main refrigerant)
Coefficient of refrigerating performance
Fig. 3 is duplexing matter (sodium chloride or calcium chloride+water) steam-jet refrigerating system.The steam generator 5 here is a boiler.Duplex matter steam-ejector refrigerating machine is made up of anti-icing control valve of steam jet ejector, condenser, evaporimeter and throttling and water pump etc., and its working steam is supplied with by boiler (or extracted steam from turbine of steam power plant).Its course of work is such: the pressure that comes out from boiler is P
1Working steam enter the nozzle of injector 6, in nozzle, expand rapidly, and reach very big speed at nozzle exit, form vacuum state, because the ejector action of air-flow, thereby the cold steam in the evaporimeter 1 that has attracted to be connected with injector 6 are to keep the vacuum in the evaporimeter 1.Working steam with fully mixed in the diffuser of injector 6 by the steam of injection after, be compressed to condensing pressure P together
k, enter condenser 3 then and be condensed into liquid, be i.e. condensate water, condensate water is divided into two-way after condenser 3 is drawn, the one tunnel sends boiler back to condensate pump 7, as the feedwater of boiler, producing working steam, another road is through the anti-icing control valve 4 of the throttling evaporating pressure P that reduces pressure
0After enter the bottom of evaporimeter 1, contain salt solution (aqueous solution such as sodium chloride or calcium chloride) in the evaporimeter 1.Condensate water becomes superheated water behind expenditure and pressure, therefore wherein part water evaporates voluntarily, because water evaporates needed heat and can only draw from the water that all the other are not vaporized, the result reduces the water temperature of remainder, refrigerant (water or other refrigerating mediums that this part has been cooled, be positioned at the top of evaporimeter 1) be transported to the user who uses cold, Returning evaporimeter 1 after endothermic temperature raises.Equally, the superheated water that a part forms because of the throttling step-down evaporates heat absorption voluntarily, and its heat is taken from superheated water self, becomes saturation water so all the other superheated waters of not vaporizing are lowered the temperature because of heat is sucked away, and obtains cooling again.Come down to a steam-water separator as above-mentioned evaporimeter 1, it will be separated from the steam water interface after the throttling, because the evaporation voluntarily of salt solution that throttling process causes is to carry out in working medium inside.Since working medium evaporate voluntarily the low temperature and low pressure steam that produced constantly by injection in injector 6, so the vacuum in the evaporimeter 1 can remain unchanged, thereby realized process of refrigerastion.Because the freezing point of salt solution can be lower than 0 ℃, the condensed water that enters evaporimeter is positioned at its bottom, and refrigerant 8 (water or other refrigerating mediums) is positioned at the top of evaporimeter 1, utilizes its difference in height, can realize through the anti-icing control valve 4 of the throttling evaporating pressure P that reduces pressure
0After enter the bottom of evaporimeter 1 temperature be higher than 0 ℃, concrete technical application is: the temperature and pressure sensor of the anti-icing control valve 4 of throttling be installed on the anti-icing control valve 4 of throttling and the tube connector of evaporimeter 1 evaporimeter 1 the porch, guarantee that the upper temp that enters evaporimeter 1 is not less than in 0 ℃, be generally 3～5 ℃, promptly when evaporimeter 1 the porch temperature be near or below design temperature after, the orifice of the anti-icing control valve 4 of throttling increases, temperature recovery, other the time then by normal regulating rule operation.Temperature along evaporimeter 1 height is successively decreased, and has solved the stifled problem of ice of choke valve.
Fig. 4 is three working medium (lithium bromide+salt+water) absorption systems.There is shown the groundwork circulation of lithium bromide salt solution Absorption Refrigerator.At first send into generator 12 through solution heat exchanger 17 from the bromize lithium dilute solution 15 of absorber 16 by generator pump 20.Be generally working steam 10 heating about 0.2MPa in being managed in generator 12, until boiling, part moisture start vaporizer is separated out in the solution.Temperature is constantly to rise in evaporation process, and at this moment the concentration of solution also constantly increases and becomes bromize lithium concentrated solution 11.The water as refrigerant steam that the evaporates liquid barrier of upwards flowing through, condenser 3 will just be entered after the entrained drop separation, cooling water 14 coolings that device 3 tube bundles that are condensed are interior, be condensed into water, claim water as refrigerant 9, water as refrigerant 9 accumulates in the water pond of condenser 3 bottoms, treat that water as refrigerant 9 in the water pond has certain liquid level after, water as refrigerant 9 just flow in the evaporimeter 1 along the anti-icing control valve 4 of throttling.Because the pressure in the pressure ratio condenser 3 in the evaporimeter 1 is low, during as 45 ℃ of condensation temperatures, condensing pressure is 9580Pa; When the evaporating temperature of lithium-bromide absorption-type refrigerating machine was 5 ℃ at present, evaporating pressure was 872Pa, for water, reduced evaporating temperature again as desiring, and then might make coolant-icing, caused thrashing.In order to prevent to freeze, the anti-icing control valve 4 of throttling should guarantee that the upper temp that enters evaporimeter 1 is not less than in 0 ℃, be generally 3～5 ℃, the temperature and pressure sensor of the anti-icing control valve 4 of throttling be installed on the anti-icing control valve of throttling 4 and the tube connector of evaporimeter 1 evaporimeter 1 the porch, promptly when evaporimeter 1 the porch temperature be near or below design temperature after, the orifice of the anti-icing control valve 4 of throttling increases, temperature recovery, other the time then by the operation of normal regulating rule.
Condensate water becomes superheated water behind anti-icing control valve 4 expenditure and pressures of throttling, therefore wherein part water evaporates voluntarily, because water evaporates needed heat and can only draw from the water that all the other are not vaporized, the result reduces the water temperature of remainder, refrigerant (water or other refrigerating mediums that this part has been cooled, be positioned at the top of evaporimeter) be transported to the user who uses cold, Returning evaporimeter 1 after endothermic temperature raises.Equally, the superheated water that a part forms because of the anti-icing control valve 4 throttling step-downs of throttling evaporates heat absorption voluntarily, and its heat is taken from superheated water self, becomes saturation water so all the other superheated waters of not vaporizing are lowered the temperature because of heat is sucked away, and obtains cooling again.Come down to a steam-water separator as above-mentioned evaporimeter 1, it will be separated from the steam water interface after the throttling, because the evaporation voluntarily of salt solution that throttling process causes 13 is to carry out in working medium inside.Because working medium is evaporated the low temperature and low pressure steam that is produced voluntarily and is constantly absorbed by bromize lithium concentrated solution 11, thus the vacuum in the evaporimeter 1 can remain unchanged, thereby realized process of refrigerastion.Because the freezing point of salt solution 13 can be lower than 0 ℃, the condensed water that enters evaporimeter 1 is positioned at its bottom, and refrigerant 8 (water or other refrigerating mediums) is positioned at the top of evaporimeter, utilizes its difference in height, can realize through the choke valve evaporating pressure P that reduces pressure
0After enter the bottom of evaporimeter 1 temperature be higher than 0 ℃, the upper temp of evaporimeter 1 is lower than in 0 ℃ (as-10 ℃, evaporating pressure is 259Pa), successively decreases along the temperature of evaporimeter 1 height, has solved the stifled problem of ice of choke valve.
After water as refrigerant enters evaporimeter 1, because pressure reduces, and mix with salt solution 13 in the evaporimeter, part salt solution 13 start vaporizers, but because evaporimeter 1 is a spray type heat exchanger, spray liquid has a certain amount of requirement, so 13 of most of cryogen salt solution accumulate in the water pond earlier, it is sent in the shower of evaporimeter with evaporimeter pump 18 with the cryogen salt solution that is several times as much as evaporation capacity then, be spread across on the tube bundle through nozzle, salt solution 13 just evaporates heat absorption, and the water in the tube bundle is emitted heat and is cooled to required temperature, the refrigerating medium that becomes production technology or idle call is delivered to the user, and recycles it.
Because absorber 16 internal pressures are lower slightly than the pressure in the evaporimeter 1, the water as refrigerant steam that generates in the evaporimeter 1 will be to absorber 16 diffluences.Enter absorber 16 after the drop separation that the liquid barrier of steam by the tube bundle both sides will wherein carry, the absorption liquid that is sprayed absorbs, because of absorber 16 also is a spray type heat exchanger, in order to satisfy the requirement of certain spray flux, absorption liquid is to be mixed by the bromize lithium dilute solution 15 in the lithium-bromide solution of generator 12 and a part of absorber, is called intermediate solution.Intermediate solution is to deliver in the shower of absorber 16 by absorber 19, and the nozzle by shower is sprinkled upon on the tube bundle then.The cooling water 14 that then is absorbed the bottom of device 16 as for liberated heat in absorption process absorbs, and intermediate solution has absorbed a certain amount of water vapour becomes the bottom that weak solution accumulates in absorber 16, delivers to generator 12 by generator pump 20 again, and so circulation endlessly.
Claims (10)
1, a kind of refrigerating method that is lower than cold-producing medium low-temperature receiver below freezing that makes, utilizing cold-producing medium to be vaporized into the needed phase transition energy of steam state by liquid state under low-temp low-pressure freezes as refrigerating capacity, it is characterized in that: refrigeration working medium is made up of main refrigerant and auxiliary refrigerant in the evaporimeter, main refrigerant is a phase change refrigerant, auxiliary refrigerant is for mixing with main refrigerant but do not participate in the solid-state cold-producing medium of phase transformation, and wherein said solid-state cold-producing medium can reduce the freezing point of described phase change refrigerant; Utilize the anti-icing control valve of throttling that is installed between condenser and the evaporimeter simultaneously, water temperature is more than the freezing point of main refrigerant temperature after adopting negative-feedback to control throttling assurance throttling automatically, in case main refrigerant freezes, concrete mode is that the anti-icing control valve of throttling is by being installed on the temperature and pressure sensor thermometric at evaporator inlet place, guarantee that the main refrigerant temperature that enters evaporimeter is not less than freezing point, after evaporator inlet place temperature is near or below preset temperature, the orifice of the anti-icing control valve of throttling increases, temperature recovery.
2, the refrigerating method that is lower than cold-producing medium low-temperature receiver below freezing that makes according to claim 1, it is characterized in that: its refrigerating method is the steam compression type refrigeration method.
3, the refrigerating method that is lower than cold-producing medium low-temperature receiver below freezing that makes according to claim 1, it is characterized in that: its refrigerating method is an absorption-type refrigerating method.
4, the refrigerating method that is lower than cold-producing medium low-temperature receiver below freezing that makes according to claim 1, it is characterized in that: its refrigerating method is steam-sprayed refrigerating method.
5, the refrigerating method that is lower than cold-producing medium low-temperature receiver below freezing that makes according to claim 1, it is characterized in that: its refrigerating method is the absorption type refrigerating method.
6, according to the described refrigerating method that is lower than cold-producing medium low-temperature receiver below freezing that makes of claim 1, it is characterized in that: described main refrigerant is a water, and described auxiliary refrigerant is sodium chloride or calcium chloride.
7, a kind of refrigeration system that is lower than cold-producing medium low-temperature receiver below freezing that makes comprises evaporimeter (1), condenser (3), it is characterized in that:
Refrigeration working medium is made up of main refrigerant and auxiliary refrigerant in the described evaporimeter (1), main refrigerant is a phase change refrigerant, auxiliary refrigerant is for mixing with main refrigerant but do not participate in the solid-state cold-producing medium of phase transformation, and wherein auxiliary refrigerant can reduce the freezing point of main refrigerant;
Pipeline is provided with the anti-icing control valve of throttling (4) between described condenser (3) and the evaporimeter (1); The anti-icing control valve of throttling (4) is by being installed on the temperature and pressure sensor thermometric of evaporimeter (1) porch, guarantee that the main refrigerant temperature that enters evaporimeter (1) is not less than freezing point, after evaporimeter (1) porch temperature is near or below preset temperature, the orifice of the anti-icing control valve of throttling (4) increases, temperature recovery, other the time then by normal regulating rule operation.
8, according to the described refrigeration system that is lower than cold-producing medium low-temperature receiver below freezing that makes of claim 7, it is characterized in that: described main refrigerant is a water, and described auxiliary refrigerant is sodium chloride or calcium chloride.
9, according to claim 7 or the 8 described refrigeration systems that are lower than cold-producing medium low-temperature receiver below freezing that make, it is characterized in that: described refrigeration system is duplexing matter steam-jet refrigerating system, system is composed as follows: the steam (vapor) outlet of steam generator (5) links to each other with the main burner of steam jet ejector (6), the exhaust tube of steam jet ejector (6) links to each other with the top of evaporimeter (1), the vapours and the process exhaust tube that enter steam generator (5) generation of steam jet ejector (6) by main burner attract the cold steam in the next evaporimeter (1) to mix in the diffuser of steam jet ejector (6), diffuser exit links to each other with condenser (3) inlet, condenser (3) outlet is divided into two-way, one the tunnel links to each other through the water inlet of condensate pump (7) with steam generator (5), and another road links to each other with evaporimeter (1) bottom.
10, according to claim 7 or the 8 described refrigeration systems that are lower than cold-producing medium low-temperature receiver below freezing that make, it is characterized in that: described refrigeration system is three working medium absorption systems, and system is composed as follows: condenser (3) places in the higher-pressure region with generator (12) and links to each other; Evaporimeter (1) and absorber (16) place in the low-pressure area and link to each other; The drip tray gap of condenser (3) links to each other with evaporimeter (1); The outlet of absorber links to each other with generator pump (20) inlet, the outlet of generator pump (20) links to each other with generator (12) inlet through a group interface of solution heat exchanger (17), and generator (12) outlet is connected with the inlet of absorber (16) through another group interface of solution heat exchanger (17); Evaporimeter pump (18), absorber (19) connect its body and spray tube bundle separately; Generator contains bromize lithium concentrated solution in (12), and absorber contains bromize lithium dilute solution in (16).
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| CNB200810020687XA CN100561072C (en) | 2008-02-21 | 2008-02-21 | Make the refrigerating method and the refrigeration system thereof that are lower than the following low-temperature receiver of freezing point of main refrigerant |
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| CNB200810020687XA CN100561072C (en) | 2008-02-21 | 2008-02-21 | Make the refrigerating method and the refrigeration system thereof that are lower than the following low-temperature receiver of freezing point of main refrigerant |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103656A (en) * | 1993-10-15 | 1995-06-14 | 吴锡才 | Refrigerant composition and preparation of same |
| CN1120969C (en) * | 1998-03-19 | 2003-09-10 | 株式会社日立制作所 | Absorbing type refrigerator |
| CN1210367C (en) * | 2003-02-21 | 2005-07-13 | 吴文惠 | Refrigerant and portable type electroless refrigerator, ice pail and ice cup |
| CN201173639Y (en) * | 2008-02-21 | 2008-12-31 | 南京航空航天大学 | Refrigerating device for making cold source lower than main refrigerant ice point |
-
2008
- 2008-02-21 CN CNB200810020687XA patent/CN100561072C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103656A (en) * | 1993-10-15 | 1995-06-14 | 吴锡才 | Refrigerant composition and preparation of same |
| CN1120969C (en) * | 1998-03-19 | 2003-09-10 | 株式会社日立制作所 | Absorbing type refrigerator |
| CN1210367C (en) * | 2003-02-21 | 2005-07-13 | 吴文惠 | Refrigerant and portable type electroless refrigerator, ice pail and ice cup |
| CN201173639Y (en) * | 2008-02-21 | 2008-12-31 | 南京航空航天大学 | Refrigerating device for making cold source lower than main refrigerant ice point |
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| CN101231041A (en) | 2008-07-30 |
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