CN114517941A - Energy-saving device and system of central air-conditioning system - Google Patents
Energy-saving device and system of central air-conditioning system Download PDFInfo
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- CN114517941A CN114517941A CN202011305224.5A CN202011305224A CN114517941A CN 114517941 A CN114517941 A CN 114517941A CN 202011305224 A CN202011305224 A CN 202011305224A CN 114517941 A CN114517941 A CN 114517941A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B19/00—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour
- F25B19/02—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour using fluid jet, e.g. of steam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
- F24F2005/0064—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
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- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention discloses an energy-saving device and system of a central air-conditioning system, belonging to the technical field of energy saving of the central air-conditioning system. The auxiliary compressor is added to increase the pressure of the refrigerant before air inlet, the injection fluid steam is sucked in the ejector by the high-temperature high-pressure refrigerant saturated steam passing through the generator, the pressure of the refrigerant is increased by the gas compression assembly in the sucking process, and the difficulty of pressure increase of the ejector is reduced; the mixing chamber assembly increases the mixing rate and uniformity of fluid steam and a refrigerant, improves the heat exchange efficiency and reduces energy loss; the solar energy is converted into the heat energy of the heat-carrying medium to heat the refrigerant, and the solar heat collecting system and the jet refrigerating system are combined, so that the conversion and utilization of the solar energy are realized, and the electric energy supply of a central air-conditioning system is reduced.
Description
Technical Field
The invention relates to the technical field of energy conservation of central air-conditioning systems, in particular to an energy-saving device and system of a central air-conditioning system.
Background
The central air-conditioning system has a main machine and a terminal system, the medium for bearing indoor heat and humidity load can be divided into a total air system, a total water system, an air-water system and a refrigerant system, the medium can be divided into a centralized type and a semi-centralized type according to the concentration degree of air treatment equipment, the medium can be divided into a closed type, a straight flow type and a mixed type (primary return air and secondary return air) according to the source of the treated air, and the main components of the central air-conditioning system are an air-conditioning main machine (cold and heat source), a combined air-conditioning unit (air cabinet), a fan coil and the like.
The central air-conditioning system has the advantages of quick refrigeration and wide range, but a large amount of energy can be wasted in the using process, and an energy-saving central air-conditioning system is urgently needed, but the energy conservation of the existing central air-conditioning system depends on a control system to save energy.
The patent No. CN201220724568.4 discloses an energy-saving control device for a central air-conditioning system, which comprises a structural upper computer and a plurality of lower computers, wherein the upper computer consists of an engineering design module, an engineering application module and a database; the lower computer comprises a PLC installed on each equipment site, the PLC carries out data transmission with the upper computer through RS485 bus communication, and the upper computer carries out centralized monitoring and control on each equipment through the RS485 bus. The utility model discloses still provide the energy-saving control step to central air conditioning system. The advantages are that: because an upper computer and a lower computer are adopted, the lower computer is provided with a plurality of PLCs on each equipment site, the upper computer comprises an engineering design module, an engineering application module and a database, the controllability and the energy conservation of the air conditioning system are combined, and on the basis of finishing the monitoring and control of the air conditioning system equipment, the refrigerating water system and the cooling water system of the central air conditioning system are dynamically adjusted through centralized optimization, so that the air conditioning system realizes high-efficiency operation, and the integrated energy conservation of the air conditioning system can be realized by more than 20%; but the control system is improved only, so that the energy-saving effect in many aspects cannot be realized, the energy-saving channel is less, and the range is narrow.
Disclosure of Invention
The invention aims to provide an energy-saving device and an energy-saving system for a central air-conditioning system, wherein the pressure of a refrigerant before air inlet is increased by adding an auxiliary compressor, the injection fluid steam is sucked in an ejector by high-temperature high-pressure refrigerant saturated steam passing through a generator, a gas compression assembly improves the pressure of the refrigerant in the sucking process, and the difficulty of pressure lifting of the ejector is reduced; the mixing chamber assembly increases the mixing rate and uniformity of fluid steam and a refrigerant, improves the heat exchange efficiency and reduces energy loss; the solar heat collecting system is combined with the jet refrigerating system, wherein the solar heat collector converts solar energy into heat energy of a heat-carrying medium, the heated heat-carrying medium transfers the heat to a refrigerant through a generator, the refrigerant is evaporated and vaporized, the heat-carrying medium after heat loss is sent into the heat collector through a circulating pump to be heated again and enters the next circulation, the conversion and utilization of the solar energy are realized, the electric energy supply of a central air-conditioning system is reduced, and the problems provided by the background technology are solved.
In order to achieve the purpose, the invention provides the following technical scheme: the energy-saving device of the central air-conditioning system comprises an ejector, wherein the ejector comprises a receiving chamber assembly, a mixing chamber assembly and a gas compression assembly, the front end of the receiving chamber assembly is connected with the gas compression assembly, and the rear end of the receiving chamber assembly is connected with the mixing chamber assembly;
the receiving chamber assembly comprises an injection fluid inlet, a working fluid inlet, a receiving chamber, a nozzle, a receiving chamber shell and a hose, wherein the receiving chamber is formed by hollowing the receiving chamber shell, the nozzle is arranged in the middle of the receiving chamber, the working fluid inlet is formed in the front end face of the receiving chamber shell, the working fluid inlet is connected with the hose, the working fluid inlet is mutually communicated with the front end port of the nozzle, and the injection fluid inlet is formed in the side wall of the receiving chamber shell;
the gas compression assembly comprises an inner top plate, two guide rods, a recovery spring, a cross-shaped support, a front end plate, guide holes, limiting holes, a lifting cylinder assembly and a telescopic pipe, wherein the front end surface of the inner top plate is fixedly connected with the two guide rods, the front ends of the two guide rods are fixedly connected with the cross-shaped support, the middle parts of the two guide rods are slidably connected with the front end plate, the two lifting cylinder assemblies are connected between the cross-shaped support and the front end plate, the limiting holes are formed in the middle parts of the cross-shaped support, the guide holes are formed in the middle parts of the front end plate, the telescopic pipe is fixedly connected between the front end plate and the inner top plate, the recovery spring is sleeved outside the telescopic pipe, one end of the recovery spring is fixedly connected to the front end plate, and the other end of the recovery spring is fixedly connected to the inner top plate; the limiting hole is connected with a hose in a sliding mode, the hose is fixedly connected with the guide hole, the middle of the inner top plate is provided with a through hole, the through hole is communicated with the telescopic pipe, and the telescopic pipe is communicated with the hose.
Further, the rear end port of the nozzle penetrates through the receiving chamber shell, and the rear end port of the nozzle is communicated with the mixing chamber assembly.
Furthermore, the telescopic pipe is composed of two pipe bodies which are sleeved in a sliding mode, wherein one pipe body is fixedly connected with the inner top plate, and the other pipe body is fixedly connected with the front end plate.
Further, a valve is connected to the hose.
Furthermore, the mixing chamber assembly comprises a mixing chamber conical inlet, a mixing chamber cylindrical section and a diffusion chamber, wherein the mixing chamber conical inlet and the diffusion chamber are connected with each other through the mixing chamber cylindrical section, the mixing chamber conical inlet is in a horn shape with a wide front end and a narrow rear end, and the diffusion chamber is in a horn shape with a wide rear end and a narrow front end.
Further, the mixing chamber assembly comprises a mixing chamber, a conveying pipe, a transmission gear, a driving gear, a transmission shaft and a servo motor, wherein the conveying pipe is connected to the two ends of the mixing chamber, the transmission gear is fixedly connected to the middle of the mixing chamber, the transmission gear is meshed with the driving gear, and the driving gear is connected with the servo motor through the transmission shaft.
Furthermore, the servo motor is fixedly connected to the motor mounting plate through bolts, and the middle of the motor mounting plate is rotatably connected with the transmission shaft and the delivery pipe through bearings.
According to another aspect of the invention, an energy-saving system of a central air-conditioning system is provided, which comprises a solar heat collecting system, an injection refrigerating system and the central air-conditioning system, wherein the solar heat collecting system is connected with the central air-conditioning system through the injection refrigerating system; the solar heat collection system comprises a solar heat collector, a circulating pump and a generator, wherein the solar heat collector acquires solar energy and converts the solar energy into heat energy of a heat-carrying medium, the generator transfers the heat of the heated heat-carrying medium to a refrigerant, and the circulating pump conveys the heat-carrying medium after heat loss to the solar heat collector to be heated again; the jet refrigeration system comprises an ejector, an auxiliary compressor and a working medium pump, wherein the auxiliary compressor is installed at an injection fluid inlet of the ejector, and the auxiliary compressor adjusts the outlet pressure of the ejector by taking the outlet pressure of the main air conditioner compressor as a reference.
Furthermore, the central air-conditioning system consists of a main compressor, a condenser, an expansion valve and an evaporator, wherein low-temperature and low-pressure steam from the evaporator enters the main compressor to be pressurized, is condensed in the condenser and is expanded by the expansion valve to be evaporated in the evaporator.
Further, the ejector fluid steam flowing out of the auxiliary compressor enters the ejector.
Compared with the prior art, the invention has the beneficial effects that: according to the energy-saving device and the energy-saving system for the central air-conditioning system, the auxiliary compressor is added to increase the pressure of the refrigerant before air inlet, the injection fluid steam is sucked in the ejector by the high-temperature high-pressure refrigerant saturated steam passing through the generator, the pressure of the refrigerant is increased by the gas compression assembly in the sucking process, and the difficulty in increasing the pressure of the ejector is reduced; the mixing chamber assembly increases the mixing rate and uniformity of fluid steam and a refrigerant, improves the heat exchange efficiency and reduces energy loss; the solar heat collecting system is combined with the jet refrigerating system, wherein the solar heat collector converts solar energy into heat energy of a heat-carrying medium, the heated heat-carrying medium transfers the heat to a refrigerant through a generator, the refrigerant is evaporated and vaporized, the heat-carrying medium after heat loss is sent into the heat collector through a circulating pump to be heated again and enters the next circulation, the conversion and utilization of the solar energy are realized, and the electric energy supply of a central air-conditioning system is reduced.
Drawings
Fig. 1 is an overall structural view of an energy saving device of a central air conditioning system according to a first embodiment of the present invention;
FIG. 2 is an exploded view of an energy saving device of a central air conditioning system according to a first embodiment of the present invention;
FIG. 3 is a block diagram of a mixing chamber assembly of an economizer for a central air conditioning system according to a first embodiment of the present invention;
FIG. 4 is a schematic diagram of a gas compression assembly of an economizer for a central air conditioning system according to a first embodiment of the present invention;
fig. 5 is an overall structural view of an energy saving device of a central air conditioning system according to a second embodiment of the present invention;
FIG. 6 is a schematic diagram of the mixing chamber assembly of the economizer for central air conditioning system according to the second embodiment of the present invention;
fig. 7 is an exploded view of the mixing chamber assembly of the economizer for central air conditioning system in accordance with the second embodiment of the present invention;
FIG. 8 is a block diagram of the energy saving system of the central air conditioning system of the present invention;
FIG. 9 is a block diagram of the economizer system for the central air conditioning system of the present invention;
fig. 10 is a schematic diagram of the connection of the economizer system of the central air conditioning system according to the present invention.
In the figure: 1. a receiving chamber assembly; 11. an ejection fluid inlet; 12. a working fluid inlet; 13. a receiving cavity; 14. a nozzle; 15. a receiving chamber housing; 16. a hose; 2. a mixing chamber assembly; 21. a mixing chamber conical inlet; 22. a mixing chamber cylindrical section; 23. a pressure expansion chamber; 24. a drive gear; 25. a drive shaft; 26. a servo motor; 27. a mixing chamber; 28. a delivery pipe; 29. a transmission gear; 30. a motor mounting plate; 3. a gas compression assembly; 31. an inner ceiling plate; 32. a guide bar; 33. a restoring spring; 34. a cross-shaped bracket; 35. a front end plate; 36. a guide hole; 37. a limiting hole; 38. a lift cylinder assembly; 39. a telescopic pipe; 4. a solar energy collection system; 41. a solar heat collector; 42. a circulation pump; 43. a generator; 5. a jet refrigeration system; 51. an ejector; 52. an auxiliary compressor; 53. a working medium pump; 6. a central air conditioning system; 61. a main compressor; 62. a condenser; 63. an expansion valve; 64. an evaporator.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example one
Referring to fig. 1 to 4, an energy saving device of a central air conditioning system includes an injector 51, the injector 51 includes a receiving chamber assembly 1, a mixing chamber assembly 2 and a gas compression assembly 3, the front end of the receiving chamber assembly 1 is connected with the gas compression assembly 3, and the rear end of the receiving chamber assembly 1 is connected with the mixing chamber assembly 2; the receiving chamber assembly 1 comprises an injection fluid inlet 11, a working fluid inlet 12, a receiving chamber 13, a nozzle 14, a receiving chamber shell 15 and a hose 16, wherein the receiving chamber 13 is formed in the receiving chamber shell 15 in a hollow mode, the nozzle 14 is arranged in the middle of the receiving chamber 13, the working fluid inlet 12 is formed in the front end face of the receiving chamber shell 15, the working fluid inlet 12 is connected with the hose 16, the hose 16 is connected with a valve, the working fluid inlet 12 is communicated with the front end port of the nozzle 14, and the injection fluid inlet 11 is formed in the side wall of the receiving chamber shell 15; the rear end port of the nozzle 14 penetrates the receiving chamber housing 15, and the rear end port of the nozzle 14 communicates with the mixing chamber assembly 2.
The gas compression assembly 3 comprises an inner top plate 31, guide rods 32, a recovery spring 33, a cross-shaped support 34, a front end plate 35, guide holes 36, limit holes 37, a lifting cylinder assembly 38 and a telescopic pipe 39, wherein the front end surface of the inner top plate 31 is fixedly connected with the two guide rods 32, the front ends of the two guide rods 32 are fixedly connected with the cross-shaped support 34, the middle parts of the two guide rods 32 are slidably connected with the front end plate 35, the two lifting cylinder assemblies 38 are connected between the cross-shaped support 34 and the front end plate 35, the middle part of the cross-shaped support 34 is provided with the limit holes 37, the middle part of the front end plate 35 is provided with the guide holes 36, the telescopic pipe 39 is fixedly connected between the front end plate 35 and the inner top plate 31, the recovery spring 33 is sleeved outside the telescopic pipe 39, one end of the recovery spring 33 is fixedly connected to the front end plate 35, and the other end is fixedly connected to the inner top plate 31; the limiting hole 37 is connected with a hose 16 in a sliding mode, the hose 16 is fixedly connected with the guide hole 36, the middle of the inner top plate 31 is provided with a through hole, the through hole is communicated with an extension tube 39, the extension tube 39 is communicated with the hose 16, the extension tube 39 is composed of two tube bodies which are sleeved in a sliding mode, one tube body is fixedly connected with the inner top plate 31, and the other tube body is fixedly connected with the front end plate 35.
The mixing chamber assembly 2 comprises a mixing chamber conical inlet 21, a mixing chamber cylindrical section 22 and a diffusion chamber 23, wherein the mixing chamber conical inlet 21 and the diffusion chamber 23 are connected with each other through the mixing chamber cylindrical section 22, the mixing chamber conical inlet 21 is in a horn shape with a wide front end and a narrow rear end, and the diffusion chamber 23 is in a horn shape with a wide rear end and a narrow front end.
Referring to fig. 8 to 10, in order to better show the energy saving principle of energy saving of the central air conditioning system, the embodiment now proposes an energy saving system of the central air conditioning system, which includes a solar heat collecting system 4, an injection refrigeration system 5 and a central air conditioning system 6, wherein the solar heat collecting system 4 is connected to the central air conditioning system 6 through the injection refrigeration system 5; the solar heat collection system 4 comprises a solar heat collector 41, a circulating pump 42 and a generator 43, wherein the solar heat collector 41 obtains solar energy and converts the solar energy into heat energy of a heat-carrying medium, the generator 43 transfers the heat of the heated heat-carrying medium to a refrigerant, and the circulating pump 42 conveys the heat-carrying medium after heat loss to the solar heat collector 41 to be heated again; the injection refrigeration system 5 comprises an injector 51, an auxiliary compressor 52 and a working medium pump 53, wherein the auxiliary compressor 52 is installed at an injection fluid inlet 11 of the injector 51, the auxiliary compressor 52 adjusts the outlet pressure of the injector 51 by taking the outlet pressure of a main air-conditioning compressor 61 as a reference, and injection fluid steam flowing out of the auxiliary compressor 52 is sucked in the injector 51 by high-temperature high-pressure refrigerant saturated steam passing through a generator 43; the central air-conditioning system 6 is composed of a main compressor 61, a condenser 62, an expansion valve 63 and an evaporator 64, low-temperature and low-pressure steam from the evaporator 64 enters the main compressor 61 to be pressurized, then is condensed in the condenser 62, and is expanded by the expansion valve 63 to be evaporated in the evaporator 64; the gas in the ejector 51 is mixed and pressurized and then enters the condenser 62, the condensed refrigerant is divided into two paths, one path is pressurized by the circulating pump 42 and then enters the generator 43 for reheating, and the other path is expanded by the expansion valve 63 and then enters the evaporator 64 for evaporation; since it is difficult to raise the pressure of the low-temperature and low-pressure refrigerant simply discharged from the evaporator 64 to that high level by passing through the ejector 51 and the load of the generator 43 is increased, the auxiliary compressor 52 is added to raise the refrigerant pressure.
Example two
Referring to fig. 5 to 7, an energy saving device of a central air conditioning system includes an injector 51, the injector 51 includes a receiving chamber assembly 1, a mixing chamber assembly 2 and a gas compression assembly 3, the front end of the receiving chamber assembly 1 is connected with the gas compression assembly 3, and the rear end of the receiving chamber assembly 1 is connected with the mixing chamber assembly 2; the receiving chamber assembly 1 comprises an injection fluid inlet 11, a working fluid inlet 12, a receiving chamber 13, a nozzle 14, a receiving chamber shell 15 and a hose 16, wherein the receiving chamber 13 is formed in the receiving chamber shell 15 in a hollow mode, the nozzle 14 is arranged in the middle of the receiving chamber 13, the working fluid inlet 12 is formed in the front end face of the receiving chamber shell 15, the working fluid inlet 12 is connected with the hose 16, the hose 16 is connected with a valve, the working fluid inlet 12 is communicated with the front end port of the nozzle 14, and the injection fluid inlet 11 is formed in the side wall of the receiving chamber shell 15; the rear end port of the nozzle 14 penetrates the receiving chamber housing 15, and the rear end port of the nozzle 14 communicates with the mixing chamber assembly 2.
The gas compression assembly 3 comprises an inner top plate 31, guide rods 32, a recovery spring 33, a cross-shaped support 34, a front end plate 35, guide holes 36, limit holes 37, a lifting cylinder assembly 38 and a telescopic pipe 39, wherein the front end surface of the inner top plate 31 is fixedly connected with the two guide rods 32, the front ends of the two guide rods 32 are fixedly connected with the cross-shaped support 34, the middle parts of the two guide rods 32 are slidably connected with the front end plate 35, the two lifting cylinder assemblies 38 are connected between the cross-shaped support 34 and the front end plate 35, the middle part of the cross-shaped support 34 is provided with the limit holes 37, the middle part of the front end plate 35 is provided with the guide holes 36, the telescopic pipe 39 is fixedly connected between the front end plate 35 and the inner top plate 31, the recovery spring 33 is sleeved outside the telescopic pipe 39, one end of the recovery spring 33 is fixedly connected to the front end plate 35, and the other end is fixedly connected to the inner top plate 31; the limiting hole 37 is connected with a hose 16 in a sliding mode, the hose 16 is fixedly connected with the guide hole 36, the middle of the inner top plate 31 is provided with a through hole, the through hole is communicated with an extension tube 39, the extension tube 39 is communicated with the hose 16, the extension tube 39 is composed of two tube bodies which are sleeved in a sliding mode, one tube body is fixedly connected with the inner top plate 31, and the other tube body is fixedly connected with the front end plate 35.
The mixing chamber assembly 2 comprises a mixing chamber 27, a delivery pipe 28, a transmission gear 29, a driving gear 24, a transmission shaft 25 and a servo motor 26, wherein the delivery pipe 28 is connected to both ends of the mixing chamber 27, the transmission gear 29 is fixedly connected to the middle of the mixing chamber 27, the transmission gear 29 is meshed with the driving gear 24, the driving gear 24 is connected with the servo motor 26 through the transmission shaft 25, the servo motor 26 is fixedly connected to a motor mounting plate 30 through a bolt, and the transmission shaft 25 and the delivery pipe 28 are rotatably connected to the middle of the motor mounting plate 30 through a bearing.
Referring to fig. 8 to 10, in order to better show the energy saving principle of energy saving of the central air conditioning system, the embodiment now proposes an energy saving system of the central air conditioning system, which includes a solar heat collecting system 4, an injection refrigeration system 5 and a central air conditioning system 6, wherein the solar heat collecting system 4 is connected to the central air conditioning system 6 through the injection refrigeration system 5; the solar heat collecting system 4 comprises a solar heat collector 41, a circulating pump 42 and a generator 43, wherein the solar heat collector 41 obtains solar energy and converts the solar energy into heat energy of a heat-carrying medium, the generator 43 transfers the heat of the heated heat-carrying medium to a refrigerant, and the circulating pump 42 conveys the heat-losing heat-carrying medium into the solar heat collector 41 to be heated again; the injection refrigeration system 5 comprises an injector 51, an auxiliary compressor 52 and a working medium pump 53, wherein the auxiliary compressor 52 is installed at an injection fluid inlet 11 of the injector 51, the auxiliary compressor 52 adjusts the outlet pressure of the injector 51 by taking the outlet pressure of a main air-conditioning compressor 61 as a reference, and injection fluid steam flowing out of the auxiliary compressor 52 is sucked in the injector 51 by high-temperature high-pressure refrigerant saturated steam passing through a generator 43; the central air-conditioning system 6 is composed of a main compressor 61, a condenser 62, an expansion valve 63 and an evaporator 64, low-temperature and low-pressure steam from the evaporator 64 enters the main compressor 61 to be pressurized, then is condensed in the condenser 62, and is expanded by the expansion valve 63 to be evaporated in the evaporator 64; the gas in the ejector 51 is mixed and pressurized and then enters the condenser 62, the condensed refrigerant is divided into two paths, one path is pressurized by the circulating pump 42 and then enters the generator 43 for reheating, and the other path is expanded by the expansion valve 63 and then enters the evaporator 64 for evaporation; since it is difficult to raise the pressure of the low-temperature and low-pressure refrigerant simply discharged from the evaporator 64 to that high pressure by passing through the ejector 51 and the load of the generator 43 is increased, the auxiliary compressor 52 is added to raise the pressure of the refrigerant.
In summary, the following steps: according to the energy-saving device and the energy-saving system for the central air-conditioning system, the auxiliary compressor 52 is additionally arranged to increase the pressure of the refrigerant before air inlet, the injection fluid steam is sucked in the ejector 51 by the high-temperature high-pressure refrigerant saturated steam passing through the generator 43, the pressure of the refrigerant is increased by the gas compression assembly 3 in the sucking process, and the difficulty in increasing the pressure of the ejector 51 is reduced; the mixing chamber assembly 2 increases the mixing rate and uniformity of fluid steam and a refrigerant, improves the heat exchange efficiency and reduces energy loss; the solar heat collecting system 4 and the jet refrigerating system 5 are combined, wherein the solar heat collector 41 converts solar energy into heat energy of a heat-carrying medium, the heated heat-carrying medium transfers the heat energy to a refrigerant through the generator 43, the refrigerant is evaporated and vaporized, the heat-carrying medium after heat loss is sent into the heat collector through the circulating pump 42 to be heated again, and then enters the next circulation, so that the conversion and utilization of the solar energy are realized, and the electric energy supply of the central air-conditioning system 6 is reduced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (10)
1. The energy-saving device of the central air-conditioning system is characterized by comprising an ejector (51), wherein the ejector (51) comprises a receiving chamber assembly (1), a mixing chamber assembly (2) and a gas compression assembly (3), the front end of the receiving chamber assembly (1) is connected with the gas compression assembly (3), and the rear end of the receiving chamber assembly (1) is connected with the mixing chamber assembly (2);
the receiving chamber assembly (1) comprises an injection fluid inlet (11), a working fluid inlet (12), a receiving chamber (13), a nozzle (14), a receiving chamber shell (15) and a hose (16), wherein the receiving chamber (13) is formed by hollowing the receiving chamber shell (15), the nozzle (14) is arranged in the middle of the receiving chamber (13), the working fluid inlet (12) is formed in the front end face of the receiving chamber shell (15), the working fluid inlet (12) is connected with the hose (16), the working fluid inlet (12) is communicated with the front end port of the nozzle (14), and the injection fluid inlet (11) is formed in the side wall of the receiving chamber shell (15);
the gas compression assembly (3) comprises an inner top plate (31), guide rods (32), a recovery spring (33), a cross-shaped support (34), a front end plate (35), guide holes (36), limiting holes (37), lifting cylinder assemblies (38) and telescopic pipes (39), wherein the front end surface of the inner top plate (31) is fixedly connected with the two guide rods (32), the front ends of the two guide rods (32) are fixedly connected with the cross-shaped support (34), the middle parts of the two guide rods (32) are slidably connected with the front end plate (35), the two lifting cylinder assemblies (38) are connected between the cross-shaped support (34) and the front end plate (35), the limiting holes (37) are formed in the middle part of the cross-shaped support (34), the guide holes (36) are formed in the middle part of the front end plate (35), the telescopic pipes (39) are fixedly connected between the front end plate (35) and the inner top plate (31), a recovery spring (33) is sleeved outside the extension tube (39), one end of the recovery spring (33) is fixedly connected to the front end plate (35), and the other end of the recovery spring is fixedly connected to the inner top plate (31); the limiting hole (37) is connected with a hose (16) in a sliding mode, the hose (16) is fixedly connected with the guide hole (36), the middle of the inner top plate (31) is provided with a through hole, the through hole is communicated with the telescopic pipe (39), and the telescopic pipe (39) is communicated with the hose (16).
2. A central air conditioning system economizer as claimed in claim 1 wherein the rear end port of said nozzle (14) passes through the receiving chamber housing (15), the rear end port of the nozzle (14) communicating with the mixing chamber assembly (2).
3. An energy-saving device for central air-conditioning system as claimed in claim 1, characterized in that the telescopic tube (39) is composed of two tubes which are slidably sleeved, wherein one tube is fixedly connected with the inner top plate (31), and the other tube is fixedly connected with the front end plate (35).
4. An economizer for central air conditioning systems according to claim 1, characterized in that a valve is connected to the hose (16).
5. The central air conditioning system economizer of claim 1 wherein the mixing chamber assembly (2) comprises a mixing chamber conical inlet (21), a mixing chamber cylindrical section (22) and a diffuser chamber (23), the mixing chamber conical inlet (21) and the diffuser chamber (23) are connected with each other through the mixing chamber cylindrical section (22), the mixing chamber conical inlet (21) is in a trumpet shape with a wide front end and a narrow rear end, and the diffuser chamber (23) is in a trumpet shape with a wide rear end and a narrow front end.
6. The central air conditioning system energy saving device of claim 1, characterized in that the mixing chamber assembly (2) comprises a mixing chamber (27), a delivery pipe (28), a transmission gear (29), a driving gear (24), a transmission shaft (25) and a servo motor (26), wherein the delivery pipe (28) is connected to both ends of the mixing chamber (27), the transmission gear (29) is fixedly connected to the middle of the mixing chamber (27), the transmission gear (29) is meshed with the driving gear (24), and the driving gear (24) is connected with the servo motor (26) through the transmission shaft (25).
7. An energy saving device of central air conditioning system as claimed in claim 6, wherein the servo motor (26) is fixedly connected to the motor mounting plate (30) by bolts, and the middle part of the motor mounting plate (30) is rotatably connected with the transmission shaft (25) and the delivery pipe (28) by bearings.
8. The central air-conditioning system energy-saving system according to any one of claims 1 to 7, characterized by comprising a solar heat collecting system (4), an injection refrigerating system (5) and a central air-conditioning system (6), wherein the solar heat collecting system (4) is connected with the central air-conditioning system (6) through the injection refrigerating system (5); the solar heat collection system (4) comprises a solar heat collector (41), a circulating pump (42) and a generator (43), wherein the solar heat collector (41) acquires solar energy and converts the solar energy into heat energy of a heat-carrying medium, the generator (43) transfers the heat of the heated heat-carrying medium to a refrigerant, and the circulating pump (42) conveys the heat-carrying medium after heat loss to the solar heat collector (41) to be heated again; the injection refrigeration system (5) comprises an injector (51), an auxiliary compressor (52) and a working medium pump (53), wherein the auxiliary compressor (52) is installed at an injection fluid inlet (11) of the injector (51), and the auxiliary compressor (52) adjusts the outlet pressure of the injector (51) by taking the outlet pressure of a main air-conditioning compressor (61) as a reference.
9. The economizer system for central air conditioning system according to claim 8, wherein the central air conditioning system (6) is composed of a main compressor (61), a condenser (62), an expansion valve (63) and an evaporator (64), and the low-temperature and low-pressure steam from the evaporator (64) enters the main compressor (61) to be pressurized, is condensed in the condenser (62), is expanded by the expansion valve (63) and then is evaporated in the evaporator (64).
10. An economizer system for central air conditioning systems according to claim 8, wherein the secondary compressor (52) draws fluid vapor into the ejector (51).
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| CN202011305224.5A CN114517941A (en) | 2020-11-20 | 2020-11-20 | Energy-saving device and system of central air-conditioning system |
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| CN202011305224.5A CN114517941A (en) | 2020-11-20 | 2020-11-20 | Energy-saving device and system of central air-conditioning system |
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