An energy-saving air conditioning system for offshore oil platforms

Abstract

This invention belongs to the technical field of offshore platform air conditioning systems, specifically relating to an energy-saving air conditioning system for offshore oil platforms, including a hot-water type lithium bromide air conditioning system and an air conditioning remote control system. The hot-water type lithium bromide central air conditioning system is connected to combined air conditioning unit A and combined air conditioning unit B via chilled water pipes. It is also connected to combined air conditioning unit A and a waste heat boiler via heating pipes, with flue gas heat exchange plates arranged between the waste heat boiler and the branches of the heating pipes. The hot-water type lithium bromide central air conditioning system is connected to a plate heat exchanger via cooling water pipes, and the plate heat exchanger exchanges heat with seawater via seawater pipes. The unique and efficient heat exchanger and compressor design of this invention significantly reduces energy consumption, alleviates refrigerant pollution problems, enables operation in low-temperature environments, and is equipped with a remote control system.

Description

Technical Field

[0001] The invention belongs to the technical field of offshore platform air-conditioning systems, and in particular relates to an energy-saving air-conditioning system for an offshore oil platform. Background Art

[0002] The air conditioning system of an offshore oil platform is a key facility to ensure the normal operation of the platform and a comfortable working environment for the staff. The air conditioning equipment of an offshore oil platform is directly installed on each layer of the platform without a protective layer. It is exposed to strong sea breezes and waves for a long time, so it has extremely high requirements for corrosion resistance and protection level. There may be hidden explosion risks in some offshore oil platform areas, so the environment where the air conditioning equipment is used should have explosion-proof characteristics.

[0003] Problems with existing technologies: Air conditioning energy consumption level: The platform currently uses marine air conditioning, with a COP value of 1.76 at the lowest and 2.74 at the highest. The energy consumption level is basically below level 3, which does not meet the latest energy efficiency level standards. The heating of the living building still uses the traditional high-energy-consuming electric heating mode. Low pressure alarm problem in winter: When the condensing pressure is too low, the pressure difference before and after the expansion valve is too small, the capacity of the expansion valve is reduced, resulting in insufficient liquid supply capacity, lack of liquid in the evaporator, and a significant decrease in the system's cooling capacity, which causes refrigeration system failures, i.e. frequent low pressure alarms or low suction pressure alarms in the refrigeration device; The problem of no centralized control of air conditioners: The marine air conditioners currently used on the platform do not have remote communication functions, and the operating status of the air conditioners in key rooms requires a lot of on-site inspections to determine whether the units are normal; Refrigerant pollution problem: There are still a large number of air-conditioning units using refrigerant R22 on the platform. As we all know, R22 refrigerant is gradually being banned due to its damage to the ozone layer and aggravation of climate change. Summary of the invention

[0004] The purpose of the present invention is to provide an energy-saving air-conditioning system for an offshore oil platform, which can greatly reduce energy consumption, alleviate the problem of refrigerant pollution, have the ability to be used in low-temperature environments, and be equipped with a remote control system.

[0005] The technical solution adopted by the present invention is as follows: An energy-saving air conditioning system for an offshore oil platform, comprising: a hot water type lithium bromide air conditioning system and an air conditioning remote control system; The hot water type lithium bromide air conditioning system is composed of a hot water type lithium bromide central air conditioner, a combined air conditioning box A, a combined air conditioning box B, a waste heat boiler, a constant pressure water supply device, a plate heat exchanger and a pipe system for connecting the various components. The hot water type lithium bromide central air conditioner is connected to the combined air conditioning box A and the combined air conditioning box B through a chilled water pipeline. The hot water type lithium bromide central air conditioner is also connected to the combined air conditioning box A and the waste heat boiler through a heating pipeline, and a flue gas heat exchange plate is arranged between the waste heat boiler and the branch of the heating pipeline. The hot water type lithium bromide central air conditioner is connected to the plate heat exchanger through a cooling water pipeline, and the plate heat exchanger performs heat exchange with seawater through a seawater pipeline. One of the constant pressure water supply devices is connected to the chilled water return pipeline and the cooling water return pipeline, and the other constant pressure water supply device is connected to the heating return pipeline; Hot water type lithium bromide central air conditioner uses waste heat resources and the characteristic of water's lower boiling point under high vacuum state to cool; Through the enthalpy-increasing air supply circuit in the air source heat pump unit, in conjunction with the liquid storage device-flash evaporator and compressor 1, the original one-stage compression process is divided into a quasi-two-stage compression process by utilizing the entry of steam; The fluorine pump air conditioning unit performs temperature regulation through the cooperation of the fluorine pump and the compressor 2; Provide air conditioning centralized control platform through air conditioning remote control system.

[0006] Hot water type lithium bromide central air conditioner consists of lithium bromide air conditioning unit and water cooling-chilling unit; The lithium bromide air conditioning unit adopts water as refrigerant and lithium bromide aqueous solution as absorbent. The lithium bromide air conditioning unit is composed of a condenser 1, an evaporator 1, an absorber, a circulating pump and a steam generator which are arranged on the refrigerant circuit. A throttle valve 1 is arranged on the connecting pipeline between the condenser 1 and the evaporator 1. An absorption pipe and a heat exchanger are arranged inside the absorber. The absorption pipe is connected to the steam generator through a pipeline and a throttle valve 2 is arranged on the pipeline. The heat exchanger is connected to a water-cooled chiller.

[0007] The water-cooled chiller includes a chiller and a magnetic levitation compressor, the internal rotating assembly of the magnetic levitation compressor is equipped with a rotor shaft, one end of the rotor shaft is fixedly equipped with two impellers, the other end of the rotor shaft is equipped with a rotor, and a DC synchronous motor is arranged in the middle of the rotor shaft, the two ends of the rotor shaft are respectively provided with a front bearing and a rear bearing, one side of the front bearing and the rear bearing are provided with a position sensor, the other side of the front bearing and the rear bearing are provided with an electromagnetic coil, and both sides of the rotor are provided with thrust bearings.

[0008] Combined air conditioning box A is composed of an air source heat pump unit; The air source heat pump unit is composed of an evaporator 2, a liquid reservoir-flash evaporator, a filter 1, a condenser 2 and a compressor 1 arranged on a refrigerant circuit, wherein an expansion valve 1 is arranged on the connecting pipeline between the evaporator 2 and the liquid reservoir-flash evaporator, and an expansion valve 2 is arranged on the connecting pipeline between the liquid reservoir-flash evaporator and the filter 1.

[0009] Compressor 1 includes a top body located at the top, a top scroll is fixedly arranged at the bottom of the top body, an air inlet communicating with the edge of the top scroll is arranged on one side of the outer wall of the top body, an exhaust port communicating with the center of the top scroll is arranged on one side of the outer wall of the top body, a steam injection port is arranged on the outer wall of the top of the top body, the liquid reservoir-flash evaporator is connected to the steam injection port through a pipeline and a solenoid valve 1 is arranged on the pipeline.

[0010] A steam pipe is installed inside the top body, one end of the steam pipe is connected to the steam injection port, the other end of the steam pipe is connected to a nozzle, and the nozzle is fixedly installed on the top of the top scroll plate, and a check valve is installed at one end of the steam pipe close to the nozzle.

[0011] Combined air conditioning box B is composed of a fluorine pump air conditioning unit; The fluorine pump air conditioning unit is composed of a condenser three, a liquid storage tank, a fluorine pump, a filter two, an evaporator three and a compressor two arranged on the refrigerant circuit, wherein an expansion valve three is arranged on the connecting pipeline between the filter two and the evaporator three, a one-way valve one is arranged in parallel on the pipeline where the fluorine pump is located, a solenoid valve two is arranged in parallel on the pipeline where the expansion valve three is located, and a one-way valve two is arranged in parallel on the pipeline where the compressor two is located.

[0012] The air conditioning remote control system is internally provided with a monitoring center unit, an equipment management and control interface unit, an equipment status information unit, an equipment control unit, an information analysis unit, and a maintenance and early warning unit.

[0013] Wherein, the device status information unit is internally provided with a mode information unit, a temperature status unit, a temperature setting unit, an energy consumption information unit and a fault information recording unit; The device control unit is internally provided with a state control unit, a mode adjustment unit, a temperature adjustment unit and a function setting unit.

[0014] The information analysis unit is internally provided with a historical data integration unit and an icon generation unit; The maintenance and early warning unit is internally provided with a danger alarm unit, a trend analysis unit and a preventive suggestion generation unit.

[0015] The technical effects achieved by the present invention are: The present invention makes full use of the waste heat resources of the waste heat boiler through the hot water lithium bromide air conditioning system. The exhaust temperature and exhaust volume of the waste heat boiler determine the amount of hot water, and the hot water temperature and flow rate determine the refrigeration capacity of the unit. The temperature is precisely controlled. The unique and efficient heat exchanger design in the system greatly reduces energy consumption. In addition, seawater is used in combination with a plate heat exchanger to cool fresh water, and the fresh water cools the unit in a closed cycle, reducing the risk of host dirt and blockage and the maintenance workload.

[0016] The present invention adopts a magnetic levitation compressor and utilizes magnetic bearings. The system has no lubricating oil and there is no heat exchange barrier caused by the oil film. The energy efficiency does not decay during long-term operation. At the same time, the subsequent maintenance cost is ultra-low, which saves maintenance costs. The unique DC permanent magnet synchronous direct drive frequency conversion technology and the two-stage impeller design make the IPLV of the unit as high as 12.8. At the same time, it can start quickly within 30 seconds after power failure and the low current also has huge advantages. It not only reduces the capacity of electrical appliances and reduces the impact on the power grid, but also the unit runs smoothly with low noise, achieving the lowest operating cost throughout its life cycle.

[0017] The compressor 1 used in the air source heat pump unit of the present invention utilizes the jet enthalpy increase technology and optimizes the medium-pressure section refrigerant injection technology. The principle is to inhale a portion of the intermediate pressure gas, mix it with the partially compressed refrigerant and then compress it, thereby realizing two-stage compression with a single compressor, increasing the refrigerant flow in the condenser, and increasing the enthalpy difference of the main circulation loop, thereby greatly improving the efficiency of the compressor and further optimizing the energy-saving effect of the overall system.

[0018] The present invention uses a lithium bromide air conditioning unit, takes water as a refrigerant, and a lithium bromide aqueous solution as an absorbent, and utilizes the characteristic that the boiling point of water becomes low under a high vacuum state to perform refrigeration, thereby changing the use of traditional refrigerants and alleviating the problem of refrigerant pollution.

[0019] The fluorine pump air conditioning unit adopted in the present invention has three working modes. In the fluorine pump operation mode, it can be used under low temperature conditions outdoors, and its energy efficiency performance is much higher than that of the compressor operation mode, which greatly saves the power consumption of air conditioning refrigeration in the electrical room and solves the low pressure alarm problem in winter.

[0020] The present invention realizes functions such as zoning control, real-time detection, remote start and stop, and energy consumption statistics of the platform air conditioner through the air conditioning remote control system carried by the invention, which can greatly reduce the workload of on-site personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a simplified application diagram of a hot water type lithium bromide air conditioning system provided by an embodiment of the present invention; Figure 2 is a schematic diagram showing the composition of a lithium bromide air conditioning unit provided by an embodiment of the present invention; Figure 3is a structural diagram of a water-cooled chiller provided in an embodiment of the present invention; Figure 4 is a cross-sectional structural diagram of a magnetic levitation compressor provided by an embodiment of the present invention; Figure 5 is a simplified diagram of the structure of the rotor shaft provided by an embodiment of the present invention; Figure 6 is a simplified diagram of the composition of an air source heat pump unit provided by an embodiment of the present invention; Figure 7 is a structural disassembled bottom view of a compressor 1 provided by an embodiment of the present invention; Figure 8 is a cross-sectional structural diagram of a top machine body provided by an embodiment of the present invention; Fig. 9 It is a simplified diagram of the composition of the fluorine pump air conditioning unit provided by an embodiment of the present invention; Fig.10 1 is a system composition diagram of an air conditioning remote control system provided by an embodiment of the present invention.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Hot water type lithium bromide air conditioning system; 2. Hot water type lithium bromide central air conditioning; 21. Lithium bromide air conditioning unit; 211. Condenser 1; 212. Throttle valve 1; 213. Evaporator 1; 214. Absorber; 215. Circulation pump; 216. Steam generator; 217. Absorber tube; 218. Throttle valve 2; 22. Water-cooled chiller; 221. Chiller; 222. Magnetic suspension compressor; 223. Rotor shaft; 224. Impeller; 225. DC synchronous motor; 226. Rotor; 227. Position sensor; 228. Front bearing; 2 29. Electromagnetic coil; 2210. Rear bearing; 2211. Thrust bearing; 3. Combined air conditioner box A; 31. Air source heat pump unit; 311. Evaporator 2; 312. Liquid storage device-flash evaporator; 313. Filter 1; 314. Expansion valve 1; 315. Expansion valve 2; 316. Condenser 2; 317. Compressor 1; 318. Electromagnetic valve 1; 319. Top body; 3110. Top scroll disk; 3111. Exhaust port; 3112. Air inlet; 3113. Steam injection port; 3114. Steam pipe; 3115. Nozzle; 31 16. Check valve; 4. Combined air conditioning box B; 41. Fluorine pump air conditioning unit; 411. Condenser three; 412. Liquid storage tank; 413. Fluorine pump; 414. One-way valve one; 415. Filter two; 416. Evaporator three; 417. Expansion valve three; 418. Compressor two; 419. One-way valve two; 420. Solenoid valve two; 5. Waste heat boiler; 6. Constant pressure water supply device; 7. Plate heat exchanger; 8. Air conditioning remote control system; 801. Monitoring center unit; 802. Equipment control interface unit; 803. Equipment status information unit; 804. Equipment Equipment control unit; 805, information analysis unit; 806, maintenance and early warning unit; 807, mode information unit; 808, temperature status unit; 809, temperature setting unit; 810, energy consumption information unit; 811, fault information recording unit; 812, state control unit; 813, mode adjustment unit; 814, temperature adjustment unit; 815, function setting unit; 816, historical data integration unit; 817, icon generation unit; 818, danger alarm unit; 819, trend analysis unit; 820, prevention suggestion generation unit. DETAILED DESCRIPTION

[0023] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0024] like Figure 1-Figure 10As shown, an offshore oil platform energy-saving air conditioning system includes: a hot water type lithium bromide air conditioning system 1 and an air conditioning remote control system 8; the hot water type lithium bromide air conditioning system 1 is composed of a hot water type lithium bromide central air conditioner 2, a combined air conditioning box A3, a combined air conditioning box B4, a waste heat boiler 5, a constant pressure water replenishment device 6, a plate heat exchanger 7 and a pipeline system for connecting the various components. The hot water type lithium bromide central air conditioner 2 is connected to the combined air conditioning box A3 and the combined air conditioning box B4 through a chilled water pipeline. The lithium bromide central air conditioner 2 is connected to the combined air conditioning box A3 and the waste heat boiler 5 through the heating pipeline, and a flue gas heat exchange plate is arranged between the waste heat boiler 5 and the branch of the heating pipeline. The hot water lithium bromide central air conditioner 2 is connected to the plate heat exchanger 7 through the cooling water pipeline, and the plate heat exchanger 7 exchanges heat with seawater through the seawater pipeline. One of the constant pressure water supply devices 6 is connected to the chilled water return pipeline and the cooling water return pipeline, and the other constant pressure water supply device 6 is connected to the heating return pipeline.

[0025] According to the above structure, refer to the attached Figure 1 The air conditioning system diagram uses the waste heat boiler 5 and the flue gas heat exchange plate to replace the hot water in the heating pipeline. The hot water type lithium bromide central air conditioner 2 is used. The unit produces 7℃-12℃ refrigerant water, which is transported to the cold users through the pump group, and 55℃ hot water is transported in winter. In addition, seawater is used to cool the fresh water in combination with the plate heat exchanger 7. The fresh water cools the unit in a closed cycle to reduce the risk of host blockage and maintenance workload. The above process makes full use of waste heat resources. The exhaust temperature and exhaust volume of the waste heat boiler determine the amount of hot water, and the hot water temperature and flow rate determine the cooling capacity of the unit. The temperature is accurately controlled. The unique and efficient heat exchanger design in the system greatly reduces energy consumption.

[0026] Embodiment 1: Refer to the attached Figure 1-Figure 2 , the hot water type lithium bromide central air conditioner 2 is composed of a lithium bromide air conditioning unit 21 and a water-cooled chiller unit 22; The lithium bromide air conditioning unit 21 uses water as a refrigerant and a lithium bromide aqueous solution as an absorbent. The lithium bromide air conditioning unit 21 is composed of a condenser 211, an evaporator 213, an absorber 214, a circulating pump 215 and a steam generator 216 arranged on the refrigerant circuit. A throttle valve 212 is arranged on the connecting pipeline between the condenser 211 and the evaporator 213. An absorption pipe 217 and a heat exchanger are also arranged inside the absorber 214. The absorption pipe 217 is connected to the steam generator 216 through a pipeline and a throttle valve 218 is arranged on the pipeline. The heat exchanger is connected to the water-cooled chiller 22.

[0027] According to the above structure, under high vacuum conditions, the lithium bromide absorption refrigerator uses water as refrigerant and lithium bromide aqueous solution as absorbent, and uses the characteristic that the boiling point of water becomes low (only 4 degrees Celsius) under high vacuum conditions to refrigerate (using the latent heat of water boiling) to produce low-temperature water above 5°C. The specific process is as follows: after the lithium bromide aqueous solution is heated by heat medium water or other waste heat sources in the steam generator 216, the water in the solution is continuously vaporized. As the water is continuously vaporized, the concentration of the lithium bromide aqueous solution in the generator is continuously increased and enters the absorber 214, and the water vapor enters Condenser 211 is cooled by the cooling water in condenser 211 and condensed to become high-pressure and low-temperature liquid water. When the water in condenser 211 enters evaporator 213 through throttle valve 212, it expands rapidly and vaporizes, and absorbs a large amount of heat from the refrigerant water in evaporator 213 during the vaporization process, thereby achieving the purpose of cooling. In this process, low-temperature water vapor enters absorber 214 and is absorbed by the lithium bromide aqueous solution in absorber 214. The solution concentration gradually decreases and is then sent back to the generator by circulating pump 215 to complete the whole cycle.

[0028] See attached Figure 3-Figure 5 The water-cooled chiller 22 includes a chiller 221 and a magnetic levitation compressor 222. The internal rotating assembly of the magnetic levitation compressor 222 is provided with a rotor shaft 223. Two impellers 224 are fixedly installed at one end of the rotor shaft 223. A rotor 226 is installed at the other end of the rotor shaft 223. A DC synchronous motor 225 is arranged in the middle of the rotor shaft 223. A front bearing 228 and a rear bearing 2210 are respectively sleeved at both ends of the rotor shaft 223. Position sensors 227 are arranged on one side of the front bearing 228 and the rear bearing 2210. Electromagnetic coils 229 are arranged on the other sides of the front bearing 228 and the rear bearing 2210. Thrust bearings 2211 are arranged on both sides of the rotor 226.

[0029] According to the above structure, the magnetic levitation compressor 222 adopts magnetic bearings, the system has no lubricating oil, there is no heat exchange obstacle of the oil film, the energy efficiency does not decay in long-term operation, and the subsequent maintenance cost is ultra-low, saving maintenance cost. The unique DC permanent magnet synchronous direct drive frequency conversion technology and the two-stage impeller design make the IPLV of the unit as high as 12.8. At the same time, it can start quickly within 30 seconds after power failure and the starting current as low as 2A also has huge advantages. It not only reduces the capacity of electrical appliances and reduces the impact on the power grid, but also the unit runs smoothly and with low noise, achieving the lowest operating cost throughout its life cycle.

[0030] The working principle of the present invention is as follows: after the lithium bromide aqueous solution is heated by heat medium water or other waste heat sources in the steam generator 216, the water in the solution is continuously vaporized. As the water is continuously vaporized, the concentration of the lithium bromide aqueous solution in the generator is continuously increased and enters the absorber 214, while the water vapor enters the condenser 211, is cooled by the cooling water in the condenser 211 and condensed to become high-pressure and low-temperature liquid water. When the water in the condenser 211 enters the evaporator 213 through the throttle valve 212, it rapidly expands and vaporizes, and absorbs a large amount of heat from the refrigerant water in the evaporator 213 during the vaporization process, thereby achieving the purpose of cooling and refrigeration. In this process, the low-temperature water vapor enters the absorber 214 and is absorbed by the lithium bromide aqueous solution in the absorber 214. The solution concentration is gradually reduced and then sent back to the generator by the circulating pump 215 to complete the entire cycle. In the process, the water-cooled chiller 22 can be used to provide refrigerant water for the heat exchanger in the absorber 214 and the condenser 211.

[0031] Embodiment 2: Refer to the attached Figure 6-Figure 8 , the combined air conditioning box A3 is composed of an air source heat pump unit 31; The air source heat pump unit 31 is composed of an evaporator 2 311, a liquid reservoir-flash evaporator 312, a filter 1 313, a condenser 2 316 and a compressor 1 317 arranged on the refrigerant circuit, wherein an expansion valve 1 314 is arranged on the connecting pipeline between the evaporator 2 311 and the liquid reservoir-flash evaporator 312, and an expansion valve 2 315 is arranged on the connecting pipeline between the liquid reservoir-flash evaporator 312 and the filter 1 313; Refer to the attached Figure 6-Figure 8 The compressor 1 317 includes a top body 319 located at the top, a top scroll 3110 is fixedly arranged at the bottom of the top body 319, an air inlet 3112 communicating with the edge of the top scroll 3110 is arranged on one side of the outer wall of the top body 319, an exhaust port 3111 communicating with the center of the top scroll 3110 is arranged on one side of the outer wall of the top body 319, a steam injection port 3113 is arranged on the outer wall of the top of the top body 319, and the liquid storage-flash evaporator 312 is connected to the steam injection port 3113 through a pipeline, and a solenoid valve 1 318 is arranged on the pipeline; Refer to the attached Figure 6-Figure 8 A steam pipe 3114 is installed inside the top body 319, one end of the steam pipe 3114 is connected to the steam injection port 3113, the other end of the steam pipe 3114 is connected to the nozzle 3115, and the nozzle 3115 is fixedly installed on the top of the top vortex disk 3110, and a check valve 3116 is installed at one end of the steam pipe 3114 close to the nozzle 3115.

[0032] According to the above structure, compressor 1 317 receives the heat absorbed from the air by evaporator 2 311, starts to compress the energy, opens the jet enthalpy increase air supply circuit, that is, opens the solenoid valve 1 318, and the steam in the liquid storage tank-flash evaporator 312 will be passed into the compressor, and the part of the energy being compressed by compressor 1 317 will be mixed with the incoming steam. This process will continue until the working chamber of compressor 1 317 is separated from the air supply port. At this time, the steam and the energy are fully mixed to become a new energy. After the working chamber of compressor 1 317 is separated from the air supply port, the new energy is "secondarily" compressed, and finally the new energy enters condenser 2 316 to exchange heat with water. In the above process, compressor 1 317 adopts jet enthalpy increase technology and optimizes the medium-pressure refrigerant injection technology. The principle is to inhale a part of the intermediate pressure gas, mix it with the partially compressed refrigerant and then compress it, so as to realize two-stage compression with a single compressor, increase the refrigerant flow in the condenser, and increase the enthalpy difference of the main circulation circuit, thereby greatly improving the efficiency of the compressor.

[0033] The working principle of the present invention is as follows: the compressor 1 317 receives the heat absorbed from the air by the evaporator 2 311, starts to compress the energy, opens the jet enthalpy increase air supply circuit, that is, opens the solenoid valve 1 318, and the steam in the liquid storage tank-flash evaporator 312 will be passed into the compressor, and the part of the energy being compressed by the compressor 1 317 will be mixed with the incoming steam. This process will continue until the working chamber of the compressor 1 317 is separated from the air supply port. At this time, the steam and the energy are fully mixed to become a new energy. After the working chamber of the compressor 1 317 is separated from the air supply port, the new energy is subjected to "secondary" compression, and finally the new energy enters the condenser 2 316 to exchange heat with water.

[0034] Embodiment three: Refer to the attached Fig. 9 , the combined air conditioning box B4 is composed of a fluorine pump air conditioning unit 41; The fluorine pump air conditioning unit 41 is composed of a condenser three 411, a liquid storage tank 412, a fluorine pump 413, a filter two 415, an evaporator three 416 and a compressor two 418 arranged on the refrigerant circuit, wherein an expansion valve three 417 is arranged on the connecting pipeline between the filter two 415 and the evaporator three 416, a one-way valve one 414 is arranged in parallel on the pipeline where the fluorine pump 413 is located, a solenoid valve two 420 is arranged in parallel on the pipeline where the expansion valve three 417 is located, and a one-way valve two 419 is arranged in parallel on the pipeline where the compressor two 418 is located.

[0035] The working principle of the present invention is: three working modes of the fluorine pump air-conditioning unit 41. In summer, the compressor 2 418 operates in the operating mode. The fluorine pump refrigeration system is exactly the same as the conventional air-cooled room air-conditioning system. The low-temperature and low-pressure refrigerant absorbs heat and vaporizes in the evaporator, and is compressed into high-temperature and high-pressure steam by the compressor 2 418, and then enters the condenser 3 411 for heat dissipation. This mode corresponds to the condition of high outdoor temperature; in winter, the fluorine pump 413 operates in the operating mode, and the refrigerant pump, i.e., the fluorine pump 413, operates alone. When used under low outdoor temperature conditions, the energy efficiency performance is much higher than that of the compressor operating mode, which greatly saves the power consumption of air conditioning and refrigeration in the electrical room; in the transition season, the compressor 2 418 and the fluorine pump 413 operate in a mixed operating mode, and the refrigerant pump, i.e., the fluorine pump 413 and the compressor 2 418 operate together. When the outdoor temperature is low in the transition season, the energy efficiency ratio of the whole machine can be significantly improved.

[0036] Embodiment 4: See attached Fig.10 The air conditioning remote control system 8 is internally provided with a monitoring center unit 801, an equipment control interface unit 802, an equipment status information unit 803, an equipment control unit 804, an information analysis unit 805, and a maintenance and early warning unit 806; The device status information unit 803 is internally provided with a mode information unit 807, a temperature status unit 808, a temperature setting unit 809, an energy consumption information unit 810 and a fault information recording unit 811; The device control unit 804 is internally provided with a state control unit 812, a mode adjustment unit 813, a temperature adjustment unit 814 and a function setting unit 815; The information analysis unit 805 is internally provided with a historical data integration unit 816 and an icon generation unit 817; The maintenance and early warning unit 806 is internally provided with a danger alarm unit 818 , a trend analysis unit 819 and a preventive suggestion generation unit 820 .

[0037] The working principle of the present invention is as follows: the temperature and humidity of key rooms can be monitored and regulated through the monitoring center unit 801, the equipment control interface unit 802, and the equipment status information unit 803; the energy consumption detection and electricity consumption statistical analysis of air-conditioning equipment can be performed through the equipment status information unit 803 in cooperation with the information analysis unit 805; the air-conditioning in key rooms such as electrical rooms can be remotely started and stopped, the temperature can be set, and the unit can be regulated; the maintenance and early warning unit 806 can integrate the fault alarm and alarm record query of the air-conditioning equipment, and the equipment status trend can be analyzed through the trend analysis unit 819; finally, the prevention suggestion generation unit 820 can generate prevention suggestions.

[0038] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. An energy-saving air conditioning system for an offshore oil platform, characterized in that: include: Hot water type lithium bromide air conditioning system (1) and air conditioning remote control system (8); The hot water type lithium bromide air conditioning system (1) comprises a hot water type lithium bromide central air conditioner (2), a combined air conditioning box A (3), a combined air conditioning box B (4), a waste heat boiler (5), a constant pressure water supply device (6), a plate heat exchanger (7), and a pipeline system for connecting the various components. The hot water type lithium bromide central air conditioner (2) is connected to the combined air conditioning box A (3) and the combined air conditioning box B (4) through a chilled water pipeline. The hot water type lithium bromide central air conditioner (2) is also connected to the combined air conditioning box A (3) and the combined air conditioning box B (4) through a heating pipeline. The combined air conditioning box A (3) and the waste heat boiler (5) are connected, and a flue gas heat exchange plate is arranged between the waste heat boiler (5) and the branch of the heating pipeline. The hot water type lithium bromide central air conditioner (2) is connected to the plate heat exchanger (7) through the cooling water pipeline, and the plate heat exchanger (7) performs heat exchange with seawater through the seawater pipeline. One of the constant pressure water supply devices (6) is connected to the chilled water return pipeline and the cooling water return pipeline, and the other constant pressure water supply device (6) is connected to the heating return pipeline. Hot water type lithium bromide central air conditioner (2) uses waste heat resources and the characteristic that the boiling point of water decreases under high vacuum state to achieve cooling; By using the enthalpy-increasing air supply circuit in the air source heat pump unit (31), in conjunction with the liquid storage device-flash evaporator (312) and the compressor 1 (317), the original one-stage compression process is divided into a quasi-two-stage compression process by utilizing the entry of steam; The fluorine pump air conditioning unit (41) performs temperature regulation operation by cooperating with the fluorine pump (413) and the second compressor (418); An air conditioning centralized control platform is provided through the air conditioning remote control system (8).

2. The energy-saving air conditioning system for an offshore oil platform according to claim 1, characterized in that: The hot water type lithium bromide central air conditioner (2) is composed of a lithium bromide air conditioning unit (21) and a water-cooled chiller unit (22); The lithium bromide air conditioning unit (21) uses water as a refrigerant and a lithium bromide aqueous solution as an absorbent. The lithium bromide air conditioning unit (21) is composed of a condenser (211), an evaporator (213), an absorber (214), a circulating pump (215), and a steam generator (216) arranged on a refrigerant circuit. A throttle valve (212) is arranged on the connecting pipeline between the condenser (211) and the evaporator (213). An absorption pipe (217) and a heat exchanger are also arranged inside the absorber (214). The absorption pipe (217) and the steam generator (216) are connected via a pipeline and a throttle valve (218) is arranged on the pipeline. The heat exchanger is connected to the water-cooled chiller (22).

3. An offshore oil platform energy-saving air conditioning system according to claim 2, characterized in that: The water-cooled chiller (22) comprises a chiller (221) and a magnetic suspension compressor (222); a rotor shaft (223) is rotatably assembled inside the magnetic suspension compressor (222); two impellers (224) are fixedly mounted on one end of the rotor shaft (223); a rotor (226) is mounted on the other end of the rotor shaft (223); a DC synchronous motor (225) is disposed in the middle of the rotor shaft (223); a front bearing (228) and a rear bearing (2210) are sleeved on both ends of the rotor shaft (223); a position sensor (227) is disposed on one side of the front bearing (228) and the rear bearing (2210); an electromagnetic coil (229) is disposed on the other side of the front bearing (228) and the rear bearing (2210); and thrust bearings (2211) are disposed on both sides of the rotor (226).

4. The energy-saving air conditioning system for an offshore oil platform according to claim 1, characterized in that: The combined air conditioning box A (3) is composed of an air source heat pump unit (31); The air source heat pump unit (31) is composed of an evaporator 2 (311), a liquid reservoir-flash evaporator (312), a filter 1 (313), a condenser 2 (316), and a compressor 1 (317) arranged on a refrigerant circuit, wherein an expansion valve 1 (314) is arranged on the connecting pipeline between the evaporator 2 (311) and the liquid reservoir-flash evaporator (312), and an expansion valve 2 (315) is arranged on the connecting pipeline between the liquid reservoir-flash evaporator (312) and the filter 1 (313).

5. The energy-saving air conditioning system for an offshore oil platform according to claim 4, characterized in that: Compressor 1 (317) comprises a top body (319) located at the top, a top scroll (3110) being fixedly arranged at the bottom of the top body (319), an air inlet (3112) being arranged on one side of an outer wall of the top body (319) and communicating with the edge of the top scroll (3110), an exhaust port (3111) being arranged on one side of the outer wall of the top body (319) and communicating with the center of the top scroll (3110), a steam injection port (3113) being arranged on the outer wall of the top of the top body (319), and the liquid storage-flash evaporator (312) and the steam injection port (3113) being connected via a pipeline, and a solenoid valve 1 (318) being arranged on the pipeline.

6. The energy-saving air conditioning system for an offshore oil platform according to claim 5, characterized in that: A steam pipe (3114) is installed inside the top machine body (319); one end of the steam pipe (3114) is connected to the steam injection port (3113); the other end of the steam pipe (3114) is connected to a nozzle (3115); and the nozzle (3115) is fixedly installed on the top of the top vortex disk (3110); and a check valve (3116) is installed at one end of the steam pipe (3114) close to the nozzle (3115).

7. The energy-saving air conditioning system for an offshore oil platform according to claim 1, characterized in that: The combined air conditioning box B (4) is composed of a fluorine pump air conditioning unit (41); The fluorine pump air conditioning unit (41) is composed of a condenser three (411), a liquid storage tank (412), a fluorine pump (413), a filter two (415), an evaporator three (416) and a compressor two (418) arranged on a refrigerant circuit, wherein an expansion valve three (417) is arranged on the connecting pipeline between the filter two (415) and the evaporator three (416), a check valve one (414) is arranged on the pipeline where the fluorine pump (413) is located in parallel, a solenoid valve two (420) is arranged on the pipeline where the expansion valve three (417) is located in parallel, and a check valve two (419) is arranged on the pipeline where the compressor two (418) is located in parallel.

8. The energy-saving air conditioning system for an offshore oil platform according to claim 1, characterized in that: The air conditioning remote control system (8) is internally provided with a monitoring center unit (801), an equipment control interface unit (802), an equipment status information unit (803), an equipment control unit (804), an information analysis unit (805) and a maintenance and early warning unit (806).

9. The energy-saving air conditioning system for an offshore oil platform according to claim 8, characterized in that: in, The device status information unit (803) is internally provided with a mode information unit (807), a temperature status unit (808), a temperature setting unit (809), an energy consumption information unit (810) and a fault information recording unit (811); The device control unit (804) is internally provided with a state control unit (812), a mode adjustment unit (813), a temperature adjustment unit (814) and a function setting unit (815).

10. The offshore oil platform energy-saving air conditioning system according to claim 9, characterized in that: The information analysis unit (805) is internally provided with a historical data integration unit (816) and an icon generation unit (817); The maintenance and early warning unit (806) is internally provided with a danger alarm unit (818), a trend analysis unit (819) and a prevention suggestion generation unit (820).

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