CN113915805A - Bidirectional throttle pipe steam-mixing super-cavitation jet noise suppression device - Google Patents
Bidirectional throttle pipe steam-mixing super-cavitation jet noise suppression device Download PDFInfo
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- CN113915805A CN113915805A CN202110685437.3A CN202110685437A CN113915805A CN 113915805 A CN113915805 A CN 113915805A CN 202110685437 A CN202110685437 A CN 202110685437A CN 113915805 A CN113915805 A CN 113915805A
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 112
- 230000001629 suppression Effects 0.000 title claims abstract description 38
- 239000003507 refrigerant Substances 0.000 claims abstract description 53
- 238000005057 refrigeration Methods 0.000 claims abstract description 18
- 230000007704 transition Effects 0.000 claims description 60
- 239000007789 gas Substances 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 12
- 230000001603 reducing effect Effects 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000009920 food preservation Methods 0.000 abstract description 2
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 230000003584 silencer Effects 0.000 abstract 2
- 239000007788 liquid Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 244000239634 longleaf box Species 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/38—Expansion means; Dispositions thereof specially adapted for reversible cycles, e.g. bidirectional expansion restrictors
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/37—Capillary tubes
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
- F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
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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
- F25B2500/00—Problems to be solved
- F25B2500/12—Sound
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention designs a bidirectional throttle pipe steam-mixing super-cavitation jet noise suppression device, which is characterized in that refrigerant gas in the middle of an evaporator is introduced into an outlet of a bidirectional throttle pipe through a bypass capillary pipe, so that low-pressure refrigerant which flows out of the bidirectional throttle pipe and enters the evaporator is mixed with steam, cavitation noise is greatly reduced, and the mixed refrigerant flows into the evaporator again to complete circulation; the bypass capillary tubes are arranged at the two ends of the bidirectional throttle tube, the device is suitable for the system to run in a heat pump and refrigeration mode, and can also inhibit the jet noise of the bidirectional throttle tube when the flow of the refrigerant is changed; compared with the traditional silencer, the silencer has the advantages of simple structure, convenience in processing and mounting and the like; the invention has wide application, is not only suitable for common refrigerating devices such as refrigerators, air conditioners and the like, but also can be used for refrigerating heat pump systems in the fields of machinery, metallurgy, petroleum, chemical industry, food preservation, artificial environment, biological pharmacy and the like.
Description
Technical Field
The invention designs a novel bidirectional throttle pipe steam-mixing super-cavitation jet noise suppression device, and particularly relates to a bypass capillary pipe added to a connecting pipe at an inlet and an outlet of a bidirectional throttle pipe, and refrigerant gas in the front middle part of an evaporator is introduced, so that the refrigerant gas in a bypass pipe and the refrigerant in the connecting pipe are mixed and then flow back to the evaporator; because the outlet of the bidirectional throttle pipe can generate great jet noise, if steam mixing is carried out at the outlet of the bidirectional throttle pipe, the steam mixing supercavitation effect is achieved, the pressure of a steam mixing area can be improved, the cavitation coefficient is effectively reduced, the pressure of cavitation bubble collapse is obviously reduced, and cavitation erosion noise and bubble burst noise are greatly reduced.
Background
The noise research of the refrigerating system shows that besides the mechanical noise and the electromagnetic noise of the compressor, the flow noise of the refrigerant in the system pipeline directly affects the noise level of the refrigerating system and the sound quality parameters of the refrigerating system, and the throttling jet noise (especially the refrigerant bubble flow jetted from the outlet of the bidirectional throttling pipe) is a great important source of the noise of the refrigerating system. When the refrigerant enters the evaporator after coming out of the two-way throttle pipe, due to the influences of pipeline structure change, refrigerant dryness and flow resistance, at the inlet of the evaporator, the flow cross section area of the refrigerant is suddenly expanded, the flow state is in a spray shape, a plurality of vortex areas are formed in the inlet area, due to the sudden expansion of the outlet cross section, the pressure of the vortex areas is low, and simultaneously, a large number of bubbles are generated, and are broken at a high-pressure place, so that the phenomenon is called cavitation erosion, and a large number of bubble burst noises are the main reasons for generating the noises at the outlet of the throttle device. Refrigerant gas with the refrigerant pressure of an inlet pipe and the middle part of the evaporator being higher than the pressure of an ejection outlet of the two-way throttle pipe is introduced into the outlet of the two-way throttle pipe by utilizing the bypass capillary pipe, and the super-cavitation phenomenon is formed by mixing the refrigerant gas with the refrigerant gas, so that the local pressure is improved, the cavitation number is effectively reduced, the pressure of cavitation collapse is obviously reduced, the cavitation noise is greatly reduced, and the effect of reducing the whole noise pollution of the refrigerating system is achieved. According to relevant theoretical knowledge of steam-mixing dynamics, engineering thermodynamics, refrigeration principle and the like, the capillary bypass is adopted, refrigerant gas in the evaporator is introduced into the outlet of the bidirectional throttling pipe, steam mixing is carried out on the outlet of the bidirectional throttling pipe, and jet noise of the bidirectional throttling pipe is reduced, so that the effect of reducing the whole noise pollution of the refrigeration system is achieved.
Patent CN202010426518.7 (capillary tube steam-mixing supercavitation jet noise suppression device) discloses a steam-mixing supercavitation jet noise suppression device for a capillary tube throttling device, which mainly solves the problem of a jet noise suppression device of a refrigeration system using a capillary tube as a throttling device.
Patent CN202010426601.4 (bidirectional expansion valve steam-mixing supercavitation jet noise suppression device) discloses a steam-mixing supercavitation jet noise suppression device for a throttling device of a bidirectional and unidirectional electronic expansion valve, which mainly solves the problem of a jet noise suppression device of a refrigeration system using an electronic expansion valve as a throttling device.
The invention aims to solve the problem of jet noise suppression of a refrigeration heat pump system using a bidirectional throttle pipe as a throttling device.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the technical problems of overlarge throttling jet noise, large integral sound power and the like of the existing refrigerating system, the device which does not affect the effect of a refrigerating heat pump, is simple, convenient and feasible and can effectively reduce the jet noise of the bidirectional throttling pipe is designed, so that the sound quality of the whole refrigerating system is improved, and the noise pollution is reduced.
The theoretical basis of the invention is as follows: for bi-directional throttle tube refrigerant injection flow in a refrigeration system, the injection noise is primarily due to bubble popping noise. The flow speed of the gaseous refrigerant at the outlet of the two-way throttle pipe reaches or even exceeds the local sonic speed, a low-pressure area is formed at the outlet of the two-way throttle pipe when the gas refrigerant is injected and flows, the refrigerant can flash quickly due to sudden pressure reduction, a large amount of bubbles are formed to flow along with the refrigerant liquid, the bubbles can burst suddenly along with the pressure increase, and noise is generated. The invention mainly mixes steam in the low-pressure area of the outlet of the throttle pipe and the inlet of the evaporator, mixes steam in the inlet of the evaporator by connecting the bypass capillary tube by applying the steam-mixing supercavitation theory to form a supercavitation phenomenon, effectively reduces the cavitation coefficient, inhibits the generation of bubbles and simultaneously reduces the pressure of the bubbles during bursting, thereby reducing the jet noise of the refrigerant.
The technical scheme adopted by the invention is as follows: in the invention, the two ends of the bidirectional throttling pipe of the conventional refrigerating system are both connected with the bypass capillary pipe, the refrigerant gas in the evaporator is led back to the outlet of the bidirectional throttling pipe by utilizing the bypass capillary pipe to carry out local steam mixing to form a super-cavitation phenomenon, thereby reducing extra noise (cavitation collapse high-frequency sharp noise) generated by low local pressure at the outlet of the throttling device, and the mixed refrigerant flows back to the evaporator to complete circulation.
The invention relates to a device for inhibiting jet noise of a refrigerating system by utilizing bypass capillary steam-mixing supercavitation, namely on the basis of ensuring the performance coefficient of a refrigerating heat pump system, in order to reduce the throttling jet noise of a bidirectional throttle pipe of the refrigerating system, a bypass pipe is added on the basis of a throttling device of an original common refrigerating system, the bypass pipe adopts a capillary pipe, steam mixing is carried out at the outlet of the bidirectional throttle pipe, steam-mixing supercavitation is realized, the generation of bubbles and the pressure of the bubbles during collapse are reduced, the noise is inhibited from the root of the generation of the noise, the effect is more obvious than that of the traditional method, and the noise quality of the refrigerating system can be effectively improved.
The bidirectional throttle pipe steam-mixing supercavitation jet noise suppression device comprises a bidirectional throttle pipe, a condenser outlet transition pipe, an evaporator inlet transition pipe and at least 2 bypass capillary tubes; one end of each of the 1 bypass capillary tubes is connected with an outlet pipe of the bidirectional throttle pipe, and the other end of each bypass capillary tube is communicated with an inlet transition pipe of the evaporator; one end of the other bypass capillary tube is connected with the inlet tube of the bidirectional throttle pipe, and the other end of the other bypass capillary tube is communicated with the outlet transition tube of the condenser; the two bypass capillary tubes form a bypass loop, and the distance between two ports of the single bypass loop is 20-680 mm.
The bidirectional throttle pipe steam-mixing supercavitation jet noise suppression device comprises a bidirectional throttle pipe, a condenser outlet transition pipe, an evaporator inlet transition pipe and at least 2 bypass capillary tubes; one end of each of the 1 bypass capillary tubes is positioned in the range of 10-40mm of the outlet pipe of the bidirectional throttle pipe, and the other end of each bypass capillary tube is directly communicated with the front middle pipeline of the evaporator; one end of the other 1 bypass capillary is positioned in the range of 10-40mm of the inlet pipe of the bidirectional throttle pipe, and the other end is directly communicated with the transition pipeline of the outlet of the condenser; a bypass loop is formed, and the distance between two ports of the bypass loop is 20-680 mm.
The bypass capillary tubes are connected with the evaporator inlet transition tube, the inner diameter of each bypass capillary tube is 0.5-3.5mm, the depth of each bypass capillary tube extending into the evaporator inlet transition tube is 0.5-5 mm, the length of each bypass capillary tube parallel to the evaporator inlet transition tube is 10-250 mm, the number of the single-side bypass capillary tubes is 1-4, and the number of the bypass capillary tubes in the whole system is 2-8.
One end of the bypass capillary tube is inserted from the tube wall of the outlet tube of the bidirectional throttle tube, the distance between an insertion opening and the tube orifice of the bidirectional throttle tube is 5mm-30mm, the insertion depth is 0.5mm-5mm, and a welding connection mode is adopted; the other end is inserted from the upper part of the front middle pipe wall of the evaporator, the inner diameter of the bypass capillary is 0.5-3.5mm, the length of the front middle pipe wall inserted into the evaporator is 0.5-2 mm, the length of the bypass capillary is 50-750 mm, the bypass capillary is connected in a welding connection mode, the number of single sides is 1-4, and the number of the whole two sides is 2-8.
The inner diameter of the evaporator pipeline is 2mm-50mm, the wall thickness is 0.5mm-3mm, and the length is 50mm-200000 mm.
The evaporator has various types, all structural types capable of serving as heat exchangers are suitable for the evaporator, and the main types comprise a light tube type, a fin tube type, a sleeve type, a shell tube type and a plate fin type; the heat dissipation modes of the evaporator comprise an air cooling type, a water cooling type, an evaporative cooling type, natural convection and forced convection.
The material is copper tube, Bundy tube, can use in refrigerating system's metal pipeline.
The bypass capillary steam-mixing supercavitation device in the bidirectional throttle pipe steam-mixing supercavitation jet noise suppression device can be applied to all places containing throttle jet, not only can be applied to a steam compression type refrigeration system, but also can be applied to any system with bidirectional throttle pipes, and the purposes of noise reduction and silencing can be achieved.
The invention has the beneficial effects that: the invention makes full use of the theoretical basis of the steam-mixing supercavitation theory, the bubble dynamics and the like, and reduces the cavitation coefficient of the refrigerant outlet, thereby reducing the number of bubbles in the refrigerant at the outlet and obviously reducing the bubble bursting noise. The overall noise level of the refrigeration system is significantly suppressed. The invention has the advantages of simple structure, convenient processing and installation, low cost, low later maintenance cost and the like.
Drawings
FIG. 1 is a schematic diagram of a novel bidirectional throttle pipe single bypass pipe steam-mixing supercavitation jet noise suppression device of the present invention;
FIG. 2 is a schematic connection diagram of a novel bidirectional throttle pipe single bypass pipe steam-mixing supercavitation jet noise suppression device according to the present invention;
FIG. 3 is a schematic diagram of a novel bidirectional throttle pipe double bypass pipe steam-mixing supercavitation jet noise suppression device of the present invention;
FIG. 4 is a schematic connection diagram of a novel bidirectional throttle pipe double bypass pipe steam-mixing supercavitation jet noise suppression device according to the present invention;
FIG. 5 is a schematic view of the installation position of the novel bidirectional throttle pipe steam-mixing supercavitation jet noise suppression device in a refrigeration heat pump system;
in fig. 1, 2, 3, 4: the method comprises the following steps of 1-connecting 1, 2-hexagonal connector, 3-throttle valve pipe 1, 4-throttle pipe main body, 5-throttle valve pipe 2, 6-connecting 2, 7-filter screen, 8-evaporator inlet transition pipe, 9-bypass capillary pipe a, 10-condenser outlet transition pipe, 11-bypass capillary pipe b, 12-bypass capillary pipe c, 13-bypass capillary pipe d.
In fig. 5: 14-compressor, 15-four-way reversing valve, 16-heat exchanger 1, 17-bidirectional throttle pipe steam-mixing super-cavitation jet noise suppression device, 18-heat exchanger 2.
Detailed Description
The two ends of a bidirectional throttle pipe in the refrigeration heat pump system are respectively connected with a heat exchanger, when the heat exchanger connected at one end works as an evaporator, the heat exchanger connected at the other end works as a condenser, the bidirectional throttle pipe has throttling and pressure reducing effects on refrigerants flowing through the bidirectional throttle pipe from two directions, however, when the refrigeration heat pump system operates, the refrigerants always flow through the heat exchanger as the condenser first, and enter the heat exchanger as the evaporator after throttling and pressure reducing through the bidirectional throttle pipe, and the heat exchanger connected at the left end of the bidirectional throttle pipe is not assumed to be the condenser, and the heat exchanger connected at the right end correspondingly is assumed to be the evaporator. The invention will be further described and embodied in conjunction with the following drawings:
referring to fig. 1, the bidirectional throttle pipe single bypass pipe steam-mixing super-cavitation jet noise suppression device comprises a connector 1(1), a hexagonal connector 2, a throttle valve pipe 1(3), a throttle pipe main body 4, a throttle valve pipe 2(5), a connector 2(6), a filter screen 7, an evaporator inlet transition pipe 8, a bypass capillary pipe a (9) and a condenser outlet transition pipe 10. The bypass capillary a (9) has an outer diameter of 1.8-2.5mm, an inner diameter of 0.6-0.7mm and a total length of 200 mm; the length of the bypass capillary tube a (9) inserted into the front end of the evaporator inlet transition tube (8) is 5mm, and the length of the inserted front end from the outlet of the bidirectional throttle tube is 5 mm; the length of the bypass capillary tube a (9) inserted into the rear end of the evaporator inlet transition tube (8) is 5mm, and the length of the inserted rear end from the outlet of the bidirectional throttle tube is 170 mm. The connection mode of each part is oxygen welding.
Referring to fig. 2, the bidirectional throttle pipe single bypass pipe steam-mixing super-cavitation jet noise suppression device and the connecting pipeline thereof comprise a connector 1(1), a hexagonal connector 2, a throttle valve pipe 1(3), a throttle pipe main body 4, a throttle valve pipe 2(5), a connector 2(6), a filter screen 7, an evaporator inlet transition pipe 8, a bypass capillary pipe a (9), a condenser outlet transition pipe 10 and a bypass capillary pipe b (11). The bypass capillary a (9) has an outer diameter of 1.8-3.5mm, an inner diameter of 0.6-1.5mm and a total length of 200 mm; the length of the bypass capillary tube a (9) inserted into the front end of the evaporator inlet transition tube (8) is 5mm, and the distance between the inserted front end and the outlet of the bidirectional throttle tube is 5 mm; the length of the bypass capillary tube a (9) inserted into the rear end of the evaporator inlet transition tube (8) is 5mm, and the distance between the inserted rear end and the outlet of the bidirectional throttle tube is 170 mm. The bypass capillary tube b (11) has an outer diameter of 1.8-3.5mm, an inner diameter of 0.6-1.5mm and a total length of 400 mm; the length of the bypass capillary tube b (11) inserted into the rear end of the condenser outlet transition tube (10) is 5mm, and the distance between the inserted rear end and the inlet of the bidirectional throttle tube is 30 mm; the length of the bypass capillary tube b (11) inserted into the front end of the condenser outlet transition tube (10) is 10mm, and the distance between the inserted front end and the inlet of the bidirectional throttle tube is 190 mm. The connection mode of each part is oxygen welding.
Referring to fig. 3, the bidirectional throttle pipe double bypass pipe steam-mixing super-cavitation jet noise suppression device comprises a connector 1(1), a hexagonal connector 2, a throttle valve pipe 1(3), a throttle pipe main body 4, a throttle valve pipe 2(5), a connector 2(6), a filter screen 7, an evaporator inlet transition pipe 8, a bypass capillary pipe a (9), a condenser outlet transition pipe 10 and a bypass capillary pipe c (12). The bypass capillary a (9) has an outer diameter of 1.8-3.5mm, an inner diameter of 0.6-1.5mm and a total length of 200 mm; the length of the bypass capillary tube a (9) inserted into the front end of the evaporator inlet transition tube (8) is 10mm, and the distance between the inserted front end and the outlet of the bidirectional throttle tube is 5 mm; the length of the bypass capillary tube a (9) inserted into the rear end of the evaporator inlet transition tube (8) is 5mm, and the distance between the inserted rear end and the outlet of the bidirectional throttle tube is 170 mm. The bypass capillary tube c (12) has an outer diameter of 1.8-3.5mm, an inner diameter of 0.6-1.5mm and a total length of 200 mm; the length of the bypass capillary tube c (12) inserted into the front end of the evaporator inlet transition tube (8) is 5mm, and the distance between the inserted front end and the outlet of the bidirectional throttle tube is 30 mm; the length of the bypass capillary tube c (12) inserted into the rear end of the evaporator inlet transition tube (8) is 5mm, and the distance between the inserted rear end and the outlet of the bidirectional throttle tube is 190 mm. The connection mode of each part is oxygen welding.
Referring to fig. 4, the bidirectional throttle pipe double bypass pipe steam-mixing super-cavitation jet noise suppression device and the connecting pipeline thereof comprise a connector 1(1), a hexagonal connector 2, a throttle valve pipe 1(3), a throttle pipe main body 4, a throttle valve pipe 2(5), a connector 2(6), a filter screen 7, an evaporator inlet transition pipe 8, a bypass capillary pipe a (9), a condenser outlet transition pipe 10, a bypass capillary pipe b (11), a bypass capillary pipe c (12) and a bypass capillary pipe d (13). The bypass capillary a (9) has an outer diameter of 1.8-3.5mm, an inner diameter of 0.6-1.5mm and a total length of 200 mm; the length of the bypass capillary tube a (9) inserted into the front end of the evaporator inlet transition tube (8) is 5mm, and the distance between the inserted front end and the outlet of the bidirectional throttle tube is 5 mm; the length of the bypass capillary tube a (9) inserted into the rear end of the evaporator inlet transition tube (8) is 5mm, and the distance between the inserted rear end and the outlet of the bidirectional throttle tube is 170 mm. The bypass capillary tube b (11) has an outer diameter of 1.8-3.5mm, an inner diameter of 0.6-1.5mm and a total length of 400 mm; the length of the bypass capillary tube b (11) inserted into the rear end of the condenser outlet transition tube (10) is 5mm, and the distance between the inserted rear end and the inlet of the bidirectional throttle tube is 5 mm; the length of the bypass capillary tube b (11) inserted into the front end of the condenser outlet transition tube (10) is 5mm, and the distance between the inserted front end and the inlet of the bidirectional throttle tube is 170 mm. The bypass capillary tube c (12) has an outer diameter of 1.8-3.5mm, an inner diameter of 0.6-1.5mm and a total length of 200 mm; the length of the bypass capillary tube c (12) inserted into the front end of the evaporator inlet transition tube (8) is 5mm, and the distance between the inserted front end and the outlet of the bidirectional throttle tube is 30 mm; the length of the bypass capillary tube c (12) inserted into the rear end of the evaporator inlet transition tube (8) is 5mm, and the distance between the inserted rear end and the outlet of the bidirectional throttle tube is 190 mm. The bypass capillary tube d (13) has an outer diameter of 1.8-3.5mm, an inner diameter of 0.6-1.5mm and a total length of 400 mm; the length of the bypass capillary tube d (13) inserted into the rear end of the condenser outlet transition tube (10) is 5mm, and the distance between the inserted rear end and the inlet of the bidirectional throttle tube is 30 mm; the length of the bypass capillary tube d (13) inserted into the front end of the condenser outlet transition tube (10) is 5mm, and the distance between the inserted front end and the inlet of the bidirectional throttle tube is 190 mm. The connection mode of each part is oxygen welding.
The number of the bypass capillary tubes arranged on each side of the bidirectional throttle pipe is 1-4, the bypass capillary tubes are arranged in a staggered manner, the number of the whole bypass capillary tubes arranged on the two sides of the bidirectional throttle pipe is 2-8, and at least 1 bypass capillary tube is arranged on each side.
Referring to fig. 5, the refrigeration heat pump system mainly comprises a compressor (14), a four-way reversing valve (15), a heat exchanger 1(16), a bidirectional throttle pipe steam-mixing supercavitation jet noise suppression device (17) and a heat exchanger 2 (18). The bidirectional throttling pipe steam-mixing supercavitation jet noise suppression device (17) has throttling and pressure reducing effects on refrigerants flowing through the bidirectional throttling pipe steam-mixing supercavitation jet noise suppression device from two directions.
When the system circulates in a refrigeration mode (the circulation direction is the direction of a solid line arrow), high-temperature and high-pressure refrigerant gas from a compressor (14) flows through a four-way reversing valve (15) and then enters a heat exchanger 1(16) serving as a condenser to be condensed into high-pressure and normal-temperature refrigerant liquid, then the refrigerant liquid is throttled by a two-way throttle pipe and then is ejected out of an outlet pipe of the two-way throttle pipe at a high speed, and at the moment, a bypass capillary pipe connected between an outlet transition pipe of the heat exchanger 1(16) and an inlet pipe of the two-way throttle pipe does not play a role in refrigerant bubble bypass. The gas-liquid mixed refrigerant passing through the outlet of the bidirectional throttling pipe enters the heat exchanger 2(18) serving as an evaporator, and at the moment, because the flow velocity of the refrigerant is high (choked flow is possibly formed, and correspondingly, the outlet velocity of the gas-liquid mixed refrigerant is supersonic), local low pressure is formed at the outlet of the bidirectional throttling pipe, a large number of bubbles are generated (the gas content range after the throttling of a common refrigerating system is 5-35%), and then cavitation and cavitation noise are generated. The refrigerant steam with slightly high pressure at the front end, the middle part and the tail part of the heat exchanger 2(18) is introduced into the outlet of the bidirectional throttle pipe and the low pressure part of the inlet of the heat exchanger 2(18) by utilizing the capillary tube which is bypassed on the outlet pipe of the bidirectional throttle pipe, so that the steam-mixed super-cavitation effect at the outlet of the bidirectional throttle pipe is formed. The refrigerant gas-liquid is mixed and then flows back to the heat exchanger 2(18) for evaporation and heat absorption, and then is compressed into high-temperature and high-pressure refrigerant gas by the compressor (14) to complete the refrigeration cycle. The connection mode of each part of the system is oxygen welding.
When the system circulates in a heating mode (the circulation direction is the direction of a dotted line arrow), high-temperature and high-pressure refrigerant gas from a compressor (14) flows through a four-way reversing valve (15) and then enters a heat exchanger 2(18) serving as a condenser to be condensed into high-pressure and normal-temperature refrigerant liquid, and at the moment, a bypass capillary tube connected between an outlet transition tube of the heat exchanger 2(18) and an inlet tube of a bidirectional throttling tube does not play a role in refrigerant bubble bypass. Then the refrigerant is throttled by the bidirectional throttling pipe and then is jetted out of an outlet pipe of the bidirectional throttling pipe at a high speed to enter a heat exchanger 1(16) serving as an evaporator through a bidirectional throttling pipe cavitation jet noise suppression device (17), local low pressure is formed at the outlet of the bidirectional throttling pipe due to the fact that the flow speed of the refrigerant is high (choked flow is possibly formed, and correspondingly, the outlet speed of a gas-liquid mixed refrigerant is supersonic), a large number of bubbles are generated (the gas content range after the throttling of a general refrigeration system is 5% -35%), and cavitation is carried out subsequently, and cavitation noise is generated along with the cavitation noise. The refrigerant steam with slightly high pressure at the front end, the middle part and the tail part of the heat exchanger 1(16) is introduced into the outlet of the bidirectional throttling pipe and the low pressure part of the inlet of the heat exchanger 1(16) by utilizing the bypass capillary pipe to form the steam mixing super-cavitation effect at the outlet of the bidirectional throttling pipe. The refrigerant gas-liquid is mixed and then flows back to the heat exchanger 1(16) for evaporation and heat absorption, and then is compressed into high-temperature and high-pressure refrigerant gas by the compressor (14), so that the heating cycle is completed. The connection mode of each part of the system is oxygen welding.
The invention has wide application, is not only suitable for common refrigerating devices such as refrigerators, air conditioners and the like, but also can be used for refrigerating systems in the fields of machinery, metallurgy, petroleum, chemical industry, food preservation, artificial environment, biological pharmacy and the like.
Claims (5)
1. The utility model provides a two-way throttle pipe mixes vapour super cavitation injection noise suppression device which characterized in that: the refrigeration heat pump system mainly comprises a compressor (14), a four-way reversing valve (15), a heat exchanger 1(16), a bidirectional throttle pipe steam-mixing super-cavitation jet noise suppression device (17) and a heat exchanger 2 (18); the bidirectional throttling pipe steam-mixing supercavitation jet noise suppression device (17) has throttling and pressure reducing effects on refrigerants flowing through the bidirectional throttling pipe steam-mixing supercavitation jet noise suppression device from two directions; the bidirectional throttling pipe steam-mixing super-cavitation jet noise suppression device utilizes that two ends of a bidirectional throttling pipe of a conventional refrigeration system are both connected with a bypass capillary pipe, refrigerant gas in an evaporator is led back to the outlet of the bidirectional throttling pipe by utilizing the bypass capillary pipe to mix steam locally to form a super-cavitation phenomenon, so that extra noise generated by low local pressure at the outlet of the bidirectional throttling pipe is reduced, and refrigerant in a bypass pipe flows back to the inside of the evaporator after being converged to complete refrigerant circulation; comprises a bidirectional throttle pipe, a condenser outlet transition pipe, an evaporator inlet transition pipe and at least 2 bypass capillary tubes; one end of each of the 1 bypass capillary tubes is connected with an outlet pipe of the bidirectional throttle pipe, and the other end of each bypass capillary tube is communicated with an inlet transition pipe of the evaporator; one end of the other bypass capillary tube is connected with the inlet tube of the bidirectional throttle pipe, and the other end of the other bypass capillary tube is communicated with the outlet transition tube of the condenser; the two bypass capillary tubes form a bypass loop, and the distance between two ports of the single bypass loop is 20-680 mm; the concrete structure includes: comprises a joint 1(1), a hexagonal joint 2, a throttle valve pipe 1(3), a throttle pipe main body 4, a throttle valve pipe 2(5), a joint 2(6), a filter screen 7, an evaporator inlet transition pipe 8, a bypass capillary pipe a 9 and a condenser outlet transition pipe 10. The bypass capillary a (9) has an outer diameter of 1.8-2.5mm, an inner diameter of 0.6-0.7mm and a total length of 200 mm; the length of the bypass capillary tube a (9) inserted into the front end of the evaporator inlet transition tube (8) is 5mm, and the length of the inserted front end from the outlet of the bidirectional throttle tube is 5 mm; the length of the bypass capillary tube a (9) inserted into the rear end of the evaporator inlet transition tube (8) is 5mm, the length of the inserted rear end from the outlet of the bidirectional throttle tube is 170mm, and the connection mode of all parts is oxygen welding; the bypass capillary tubes are connected with the evaporator inlet transition tube, the inner diameter of each bypass capillary tube is 0.5-3.5mm, the depth of each bypass capillary tube extending into the evaporator inlet transition tube is 0.5-5 mm, the length of each bypass capillary tube parallel to the evaporator inlet transition tube is 10-250 mm, the number of the single-side bypass capillary tubes is 1-4, and the number of the bypass capillary tubes in the whole system is 2-8.
2. The bidirectional throttling pipe steam-mixing supercavitation jet noise suppression device according to claim 1, characterized in that: comprises a bidirectional throttle pipe, a condenser outlet transition pipe, an evaporator inlet transition pipe and at least 2 bypass capillary tubes; one end of each of the 1 bypass capillary tubes is positioned in the range of 10-40mm of the outlet pipe of the bidirectional throttle pipe, and the other end of each bypass capillary tube is directly communicated with the front middle pipeline of the evaporator; one end of the other 1 bypass capillary is positioned in the range of 10-40mm of the inlet pipe of the bidirectional throttle pipe, and the other end is directly communicated with the transition pipeline of the outlet of the condenser; a bypass loop is formed, and the distance between two ports of the bypass loop is 20-680 mm.
3. The bidirectional throttling pipe steam-mixing supercavitation jet noise suppression device according to claim 1, characterized in that: one end of the bypass capillary tube is inserted from the tube wall of the outlet tube of the bidirectional throttle tube, the distance between an insertion opening and the tube orifice of the bidirectional throttle tube is 5mm-30mm, the insertion depth is 0.5mm-5mm, and a welding connection mode is adopted; the other end is inserted from the upper part of the front middle pipe wall of the evaporator, the inner diameter of the bypass capillary is 0.5-3.5mm, the length of the front middle pipe wall inserted into the evaporator is 0.5-2 mm, the length of the bypass capillary is 50-750 mm, the bypass capillary is connected in a welding connection mode, the number of single sides is 1-4, and the number of the whole two sides is 2-8.
4. The bidirectional throttling pipe steam-mixing supercavitation jet noise suppression device according to claim 1, characterized in that: the bidirectional throttle pipe single bypass pipe steam-mixing supercavitation jet noise suppression device and the connecting pipeline thereof comprise a connector 1(1), a hexagonal connector 2, a throttle valve pipe 1(3), a throttle pipe main body 4, a throttle valve pipe 2(5), a connector 2(6), a filter screen 7, an evaporator inlet transition pipe 8, a bypass capillary pipe a (9), a condenser outlet transition pipe 10 and a bypass capillary pipe b (11). The bypass capillary a (9) has an outer diameter of 1.8-3.5mm, an inner diameter of 0.6-1.5mm and a total length of 200 mm; the length of the bypass capillary tube a (9) inserted into the front end of the evaporator inlet transition tube (8) is 5mm, and the distance between the inserted front end and the outlet of the bidirectional throttle tube is 5 mm; the length of the bypass capillary tube a (9) inserted into the rear end of the evaporator inlet transition tube (8) is 5mm, and the distance between the inserted rear end and the outlet of the bidirectional throttle tube is 170 mm. The bypass capillary tube b (11) has an outer diameter of 1.8-3.5mm, an inner diameter of 0.6-1.5mm and a total length of 400 mm; the length of the bypass capillary tube b (11) inserted into the rear end of the condenser outlet transition tube (10) is 5mm, and the distance between the inserted rear end and the inlet of the bidirectional throttle tube is 30 mm; the length of the bypass capillary tube b (11) inserted into the front end of the condenser outlet transition tube (10) is 10mm, and the distance between the inserted front end and the inlet of the bidirectional throttle tube is 190 mm. The connection mode of each part is oxygen welding.
5. The bidirectional throttling pipe steam-mixing supercavitation jet noise suppression device according to claim 1, characterized in that: the number of the bypass capillary tubes arranged on each side of the bidirectional throttle pipe is 1-4, the bypass capillary tubes are arranged in a staggered manner, the number of the whole bypass capillary tubes arranged on the two sides of the bidirectional throttle pipe is 2-8, and at least 1 bypass capillary tube is arranged on each side.
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| CN202110685437.3A CN113915805A (en) | 2021-06-21 | 2021-06-21 | Bidirectional throttle pipe steam-mixing super-cavitation jet noise suppression device |
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| CN202110685437.3A CN113915805A (en) | 2021-06-21 | 2021-06-21 | Bidirectional throttle pipe steam-mixing super-cavitation jet noise suppression device |
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Cited By (1)
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| WO2024051179A1 (en) * | 2022-09-08 | 2024-03-14 | 青岛海尔空调器有限总公司 | Muffler parameter determination method and apparatus, device, storage medium, and system |
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Application publication date: 20220111 |