CN1287119C - Lithium brominate absorptive-type refrigerator with absorption solution regulation and antifreeze device - Google Patents
Lithium brominate absorptive-type refrigerator with absorption solution regulation and antifreeze device Download PDFInfo
- Publication number
- CN1287119C CN1287119C CNB2004101032097A CN200410103209A CN1287119C CN 1287119 C CN1287119 C CN 1287119C CN B2004101032097 A CNB2004101032097 A CN B2004101032097A CN 200410103209 A CN200410103209 A CN 200410103209A CN 1287119 C CN1287119 C CN 1287119C
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- China
- Prior art keywords
- bromide absorption
- lithium
- absorber
- cold water
- refrigerating machine
- 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
Links
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 47
- 230000002528 anti-freeze Effects 0.000 title description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title 1
- 229910052744 lithium Inorganic materials 0.000 title 1
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims abstract description 114
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 239000006096 absorbing agent Substances 0.000 claims abstract description 42
- 230000001105 regulatory effect Effects 0.000 claims abstract description 16
- 229940059936 lithium bromide Drugs 0.000 claims description 51
- 238000001704 evaporation Methods 0.000 claims description 19
- 230000002745 absorbent Effects 0.000 claims description 16
- 239000002250 absorbent Substances 0.000 claims description 16
- 239000012530 fluid Substances 0.000 claims description 5
- 239000003507 refrigerant Substances 0.000 abstract description 22
- 230000000694 effects Effects 0.000 abstract description 4
- 238000007710 freezing Methods 0.000 abstract description 3
- 230000008014 freezing Effects 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 239000000498 cooling water Substances 0.000 description 8
- 238000005057 refrigeration Methods 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000002775 capsule Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Sorption Type Refrigeration Machines (AREA)
Abstract
The present invention relates to a lithium bromide absorption refrigerating machine which is provided with an antifreezing device for regulating and controlling absorption solutions. The present invention comprises a generator (1), an evaporator (10), an absorber (6), a condenser (9), a heat exchanger (3), a solution pump (16), a refrigerant pump (15), a control system, and pipelines and valves for connecting the generator (1), the evaporator (10), the absorber (6), the condenser (9), the heat exchanger (3), the solution pump (16), the refrigerant pump (15) and the control system. The lithium bromide absorption refrigerating machine is a direct-burning lithium bromide absorption machine set of cold water and cold and hot water, or a double effect steam lithium bromide absorption machine set of the cold water, a single effect steam lithium bromide absorption machine set of the cold water, and a single effect lithium bromide absorption machine set of the hot water. The present invention is characterized in that a solution inlet pipe (5) of the absorber (6) is provided with an electric valve (8) so as to form the antifreezing device. When the electric valve is shut down, the absorption solutions which enter the top of a heat exchange pipe bundle of the absorber are reduced or cut down according to regulation and control requirements, so that high temperature strong solutions enter the absorber through a crystal pipe, and the temperature of a cold water outlet of a machine set and the temperature of refrigerant water stops descending fast and rise; therefore, an aim that the safe operation control of the pipe freezing prevention of the machine set can be achieved under any operating condition.
Description
Technical field:
The present invention relates to a kind of lithium-bromide absorption-type refrigerating machine, especially relate to a kind of lithium-bromide absorption-type refrigerating machine that has the absorbent solution regulating and antifreezing.Belong to the refrigeration machine technical field.
Background technology:
Lithium-bromide absorption-type refrigerating machine is that a kind of the driving by heat energy moved, with water is that cold-producing medium, lithium bromide water solution are absorbent, under vacuum state, produce air conditioning or technology refrigeration plant with cold water, but the heat that its driving heat source steam, hot water or combustion fuel (fuel oil, combustion gas) produce.The heat that produces with combustion fuel is that the direct-burning type lithium bromide absorption type refrigeration machine of driving heat source can be designed and manufactured into the unit of producing cold water separately, also can be designed and manufactured into the unit that replaces or produce cold water, hot water simultaneously, thereby corresponding again direct-fired lithium bromide absorption type cold water, the hot and cold water unit of being called; With steam, hot water is that the lithium-bromide absorption-type refrigerating machine of driving heat source has only refrigerating function, thereby corresponding steam type lithium bromide absorption cold water unit and the hot water type lithium bromide absorption cooling water unit of being called.The direct-burning type lithium bromide absorption type refrigeration machine generally all is the dual effect type unit, and the hot-water type refrigeration machine mostly is the single-action unit, and the steam type refrigeration machine has the dual effect type unit, and the single-effect type unit is also arranged.
During the lithium-bromide absorption-type refrigerating machine refrigerating operaton, prevent that cold water in its parts or water as refrigerant Yin Wendu from crossing low and glaciation causes fault, the frozen pipe that freezes of the cold water in the device heat exchanger tube that especially avoids evaporating is an important safe operation control target.Lithium-bromide absorption-type refrigerating machine freezing proof technique measure in the past is to be provided with on cold water outlet temperature sensor 11 and the water as refrigerant liquid capsule 13 at evaporimeter respectively water as refrigerant temperature sensor 14 is set on the cooling water outlet pipe 12 of the evaporimeter 10 of unit (shown in Figure 1).The control system (not shown) of unit detects cold water outlet temperature and water as refrigerant temperature by temperature sensor in good time, when cold water outlet temperature or water as refrigerant temperature reach the relevant temperature lower limit of setting in the control program, control system is by stopping cryogenic fluid pump 15 and cutting off the driving heat source of unit, make unit stop refrigeration, stop cold water outlet temperature further to descend, thereby reach the safe operation control purpose that prevents the unit frozen pipe.
Lithium-bromide absorption-type refrigerating machine evaporimeter frozen pipe, be because under situations such as underload or cooling water low temperature, hypotony in the absorber, pressure in the evaporimeter is dropped to≤4.58mmHg (the pairing saturation pressure of 0 ℃ water), thus make cold water temperature in the evaporimeter heat exchanger tube be reduced to≤0 ℃ due to.Because there is hysteresis quality in temperature detection, the running temperature of unit changes when existing thermal inertia, control system to carry out antifreeze control program, and the cold water outlet temperature of unit often has been lower than preset lower limit.After control system is carried out antifreeze control program, the cold water outlet temperature of unit still can continue certain numerical value that descends, also can rest on a certain temperature value long period that is lower than preset lower limit even do not continue to descend, and can in the short time (as 1 minute), oppositely not rise.Therefore, freezing proof technique measure in the past only to the control of the safe operation under unit cold water outlet temperature and the slowly decline situation of water as refrigerant temperature effectively, then powerless because of cold water outlet temperature or the rapid decline of water as refrigerant temperature that the reasons such as decline fast or the quick reduction significantly of cooling water temperature of loading cause for unit, this situation tends to cause unit generation frozen pipe fault.
Summary of the invention:
The objective of the invention is to overcome above-mentioned deficiency, a kind of lithium-bromide absorption-type refrigerating machine that has the absorbent solution regulating and antifreezing that can both prevent the icing frozen pipe of unit under any service condition is provided.
The object of the present invention is achieved like this: a kind of lithium-bromide absorption-type refrigerating machine that has the absorbent solution regulating and antifreezing, comprise generator, evaporimeter, absorber, condenser, heat exchanger, solution pump, cryogenic fluid pump, control system and connect the pipeline of each parts, valve, described lithium-bromide absorption-type refrigerating machine is a direct-fired lithium bromide absorption type cold water, hot and cold water unit or steam double-effect type lithium bromide absorption cold water unit, steam single-effect type lithium bromide absorption cold water unit, hot water single-effect type lithium bromide absorption cold water unit, be characterized on the absorber feed tube of unit, motor-driven valve being set, constitute defroster.When cutting out, motor-driven valve, make the high temperature concentrated solution enter absorber through melting brilliant pipe by regulating the absorbent solution that the control requirement reduces or cut-out enters absorber heat exchanging tube bank top.
In lithium-bromide absorption-type refrigerating machine, by defroster is set, when the absorption pressure of unit is low excessively when causing cold water outlet temperature or water as refrigerant temperature to drop to the control limit value, start defroster, absorption pressure and evaporating pressure to unit carry out reverse adjusting control, make the cold water outlet temperature and the water as refrigerant temperature of unit stop rapidly descending and ging up, thereby reach the safe operation control purpose that under any service condition, can both prevent the icing frozen pipe of unit.
Description of drawings:
Fig. 1 is a lithium-bromide absorption-type refrigerating machine schematic diagram in the past.
Fig. 2～7 are lithium-bromide absorption-type refrigerating machine embodiment schematic diagram of the present invention.
Among Fig. 1, direct combustion high pressure generator 1-1, burner 2, high-temperature heat exchanger 3-1, low temperature heat exchanger 3-2, absorber feed tube 5, absorber 6, melt brilliant pipe 7, low pressure generator 1-2, condenser 9, evaporimeter 10, cold water outlet temperature sensor 11, cooling water outlet pipe 12, water as refrigerant liquid capsule 13, water as refrigerant temperature sensor 14, cryogenic fluid pump 15 and solution pump 16.
In Fig. 1～7, A steam transfer valve, B solution transfer valve, the import and export of C cold water, D cooling water outlet and inlet, E exhaust opening, F steam inlet, G coagulate water out, H hot water entrance.
The specific embodiment:
Invention one as shown in Figure 2, by direct combustion high pressure generator 1-1, burner 2, evaporimeter 10, absorber 6, low pressure generator 1-2, condenser 9, high-temperature heat exchanger 3-1, low temperature heat exchanger 3-2, solution pump 16, cryogenic fluid pump 15, melt brilliant pipe 7, control system (not shown) and connect on the absorber feed tube 5 of the direct-fired lithium bromide absorption type cold water that pipeline, valve constituted, hot and cold water unit of each parts magnetic valve 8 is set.During the normal refrigerating operaton of unit, magnetic valve 8 is in normally open.When unit was carried out antifreeze adjusting control, control system was closed magnetic valve, cut off the solution that enters the absorber overhead spray through absorber feed liquor device, made absorber lose the ability that absorbs refrigerant vapour, and absorption pressure stops to descend; Simultaneously, the mouth of pipe that liquid level in the low pressure generator rises and melts brilliant pipe 7 until being higher than makes that temperature and all higher concentrated solution of concentration directly enter absorber bottom through melting brilliant pipe in the low pressure generator, and pressure and temperature in the absorber are risen.The effect of this two aspect all makes evaporating pressure rise, thereby effectively prevents the danger of unit generation frozen pipe.When control system detected water as refrigerant temperature and cold water outlet temperature and all has been higher than the antifreeze management and control system ceiling temperature of setting, magnetic valve was opened.
Same magnetic valve defroster (figure slightly) all can be set on the absorber feed tube of steam double-effect type lithium bromide absorber handpiece Water Chilling Units (Fig. 3), steam single-effect type lithium bromide absorber handpiece Water Chilling Units (Fig. 4) and hot water single-effect type lithium bromide absorber handpiece Water Chilling Units (Fig. 5).
Invent two as shown in Figure 6, this unit has just been set up absorption pressure sensor 18 on the absorber 6 of direct-fired lithium bromide absorption type cold water shown in Figure 2, hot and cold water unit.The defroster of unit is made of refrigerant vapour communicating pipe, magnetic valve 8, absorption pressure sensor 18 and control system (not shown).During the normal refrigerating operaton of unit, magnetic valve is in normally open.When unit reasons such as less or cold in-water temperature is lower because of cooling load caused absorption pressure and evaporating pressure to descend, the water as refrigerant temperature in evaporating temperature, the water as refrigerant liquid capsule 13 and the cold water outlet temperature of the cooling water outlet pipe 12 of flowing through descended thereupon.In case the control system of unit detects the antifreeze management and control system upper limit pressure (as 6.58mmHg) that absorption pressure drops to setting by the absorption pressure sensor, and the absorption pressure fall off rate surpasses setting value (as 0.05mmHg/s), perhaps detect the antifreeze management and control system threshold pression (as 5.29mmHg) that absorption pressure drops to setting, control system is promptly opened the magnetic valve on the absorber feed tube, the solution that the low temperature heat exchanger internal pressure is very high enters absorber by the absorber feed tube under differential pressure action, absorption pressure is raise rapidly, thereby effectively prevent the danger of unit generation frozen pipe.When control system detected absorption pressure and has been higher than the antifreeze management and control system upper limit pressure of setting, magnetic valve was opened.For guaranteeing the validity of antifreeze operation control, the absorption pressure sensor should be arranged on the low-pressure area of absorber.As be arranged on the higher-pressure region of absorber, because of the pressure of the low-pressure area of absorber is very low, can detect distortion by build-up of pressure.
Can set up absorption pressure sensor 18 equally on the absorber of Fig. 3～unit shown in Figure 5, the control system of unit comes the magnetic valve in the defroster is carried out open and close control by detecting the absorption pressure signal, thereby effectively prevents the danger of unit generation frozen pipe.
Invent three as shown in Figure 7, this unit has just been set up evaporating pressure sensor 19 on the evaporimeter 10 of direct combustion unit shown in Figure 2.The defroster of unit is made of refrigerant vapour communicating pipe, magnetic valve 8, evaporating pressure sensor 19 and control system (not shown).During the normal refrigerating operaton of unit, magnetic valve is in normally open.When unit reasons such as less or cold in-water temperature is lower because of cooling load caused absorption pressure and evaporating pressure to descend, the water as refrigerant temperature in evaporating temperature, the water as refrigerant liquid capsule 13 and the cold water outlet temperature of the cooling water outlet pipe 12 of flowing through descended thereupon.In case the control system of unit detects the antifreeze management and control system upper limit pressure (as 6.72mmHg) that evaporating pressure drops to setting by evaporating pressure sensor 19, and the evaporating pressure fall off rate surpasses setting value (as 0.05mmHg/s), perhaps detect the antifreeze management and control system threshold pression (as 5.43mmHg) that evaporating pressure drops to setting, control system is promptly opened the magnetic valve on the absorber feed tube, the solution that the low temperature heat exchanger internal pressure is very high enters absorber by the absorber feed tube under differential pressure action, absorption pressure is raise rapidly, thereby effectively prevent the danger of unit generation frozen pipe.When control system detected evaporating pressure and has been higher than the antifreeze management and control system upper limit pressure of setting, magnetic valve was opened.For guaranteeing the validity of antifreeze operation control, the evaporating pressure sensor should be arranged on the low-pressure area of evaporimeter.As be arranged on the higher-pressure region of evaporimeter, because of the pressure of the low-pressure area of evaporimeter is very low, can detect distortion by build-up of pressure.
Equally, can set up the evaporating pressure sensor on the evaporimeter of unit shown in Fig. 3～Fig. 5, the control system of unit comes the magnetic valve in the defroster is carried out open and close control by detecting the evaporating pressure signal, thereby effectively prevents the danger of unit generation frozen pipe.
Magnetic valve in Fig. 2～unit defroster shown in Figure 7 can substitute with electric control valve.
Claims (10)
1, a kind of lithium-bromide absorption-type refrigerating machine that has the absorbent solution regulating and antifreezing, comprise generator (1), evaporimeter (10), absorber (6), condenser (9), heat exchanger (3), solution pump (16), cryogenic fluid pump (15), control system and connect pipeline, the valve of each parts, it is characterized in that on absorber (6) feed tube (5), being provided with motor-driven valve (8).
2, a kind of lithium-bromide absorption-type refrigerating machine that has the absorbent solution regulating and antifreezing according to claim 1, it is characterized in that described lithium-bromide absorption-type refrigerating machine is direct-fired lithium bromide absorption type cold water, hot and cold water unit, motor-driven valve (8) is arranged on absorber (6) feed tube (5) of direct-fired lithium bromide absorption type cold water, hot and cold water unit.
3, a kind of lithium-bromide absorption-type refrigerating machine that has the absorbent solution regulating and antifreezing according to claim 1, it is characterized in that described lithium-bromide absorption-type refrigerating machine is a steam double-effect type lithium bromide absorption cold water unit, motor-driven valve (8) is arranged on absorber (6) feed tube (5) of steam double-effect type lithium bromide absorption cold water unit.
4, a kind of lithium-bromide absorption-type refrigerating machine that has the absorbent solution regulating and antifreezing according to claim 1, it is characterized in that described lithium-bromide absorption-type refrigerating machine is a steam single-effect type lithium bromide absorption cold water unit, motor-driven valve (8) is arranged on absorber (6) feed tube (5) of steam single-effect type lithium bromide absorption cold water unit.
5, a kind of lithium-bromide absorption-type refrigerating machine that has the absorbent solution regulating and antifreezing according to claim 1, it is characterized in that described lithium-bromide absorption-type refrigerating machine is a hot water single-effect type lithium bromide absorption cold water unit, motor-driven valve (8) is arranged on absorber (6) feed tube (5) of hot water single-effect type lithium bromide absorption cold water unit.
6, according to one of them described a kind of lithium-bromide absorption-type refrigerating machine that has the absorbent solution regulating and antifreezing of claim 1～5, it is characterized in that having set up on the absorber (6) absorption pressure sensor (18).
7, according to one of them described a kind of lithium-bromide absorption-type refrigerating machine that has the absorbent solution regulating and antifreezing of claim 1～5, it is characterized in that having set up on the evaporimeter (10) evaporating pressure sensor (19).
8,, it is characterized in that motor-driven valve (8) is magnetic valve or electric control valve according to one of them described a kind of lithium-bromide absorption-type refrigerating machine that has the absorbent solution regulating and antifreezing of claim 1～5.
9, a kind of lithium-bromide absorption-type refrigerating machine that has the absorbent solution regulating and antifreezing according to claim 6 is characterized in that absorption pressure sensor (18) is arranged on the low-pressure area of absorber (6).
10, a kind of lithium-bromide absorption-type refrigerating machine that has the absorbent solution regulating and antifreezing according to claim 7 is characterized in that evaporating pressure sensor (19) is arranged on the low-pressure area of evaporimeter (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101032097A CN1287119C (en) | 2004-12-31 | 2004-12-31 | Lithium brominate absorptive-type refrigerator with absorption solution regulation and antifreeze device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101032097A CN1287119C (en) | 2004-12-31 | 2004-12-31 | Lithium brominate absorptive-type refrigerator with absorption solution regulation and antifreeze device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1632421A CN1632421A (en) | 2005-06-29 |
| CN1287119C true CN1287119C (en) | 2006-11-29 |
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ID=34848169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004101032097A Expired - Fee Related CN1287119C (en) | 2004-12-31 | 2004-12-31 | Lithium brominate absorptive-type refrigerator with absorption solution regulation and antifreeze device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1287119C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620474B (en) * | 2012-04-06 | 2014-06-04 | 广州市华德工业有限公司 | Air conditioner cold-hot water unit with antifreeze solution regenerated heat recovery device |
| CN109458751B (en) * | 2018-12-27 | 2024-04-02 | 双良节能系统股份有限公司 | On-line detection density hot water type lithium bromide absorption type low-temperature water chilling unit |
| CN113566447A (en) * | 2021-08-11 | 2021-10-29 | 镇江市富来尔制冷工程技术有限公司 | Rapid crystal melting device for lithium bromide absorption type air conditioning unit and operation method |
-
2004
- 2004-12-31 CN CNB2004101032097A patent/CN1287119C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1632421A (en) | 2005-06-29 |
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Owner name: SHUANGLIANG ECO-ENERGEY SYSTEMS CO.,LTD. Free format text: FORMER OWNER: SHUANGLIANG AIR CONDITIONING EQUIPMENT CO LTD, JIANGSU Effective date: 20100913 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20100913 Address after: 214444 Li Gang Town, Jiangsu City, Jiangyin Province Patentee after: Shuangliang Eco-Energy Systems Co.,Ltd. Address before: 214444 Li Gang Town, Jiangsu City, Jiangyin Province Patentee before: Shuangliang Eco-Energy Systems Co.,Ltd |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |