CN100554831C - High pressure control valve of transcritical carbon dioxide refrigerating system - Google Patents
High pressure control valve of transcritical carbon dioxide refrigerating system Download PDFInfo
- Publication number
- CN100554831C CN100554831C CNB2008100407099A CN200810040709A CN100554831C CN 100554831 C CN100554831 C CN 100554831C CN B2008100407099 A CNB2008100407099 A CN B2008100407099A CN 200810040709 A CN200810040709 A CN 200810040709A CN 100554831 C CN100554831 C CN 100554831C
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- Prior art keywords
- valve
- driver plate
- connecting rod
- air inlet
- plate connecting
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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
- F25B41/31—Expansion valves
- F25B41/36—Expansion valves with the valve member being actuated by bimetal elements or shape-memory elements influenced by fluids, e.g. by the refrigerant
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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
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
- F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
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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
- F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
- F25B2341/06—Details of flow restrictors or expansion valves
- F25B2341/063—Feed forward expansion valves
Abstract
A kind of high pressure control valve of transcritical carbon dioxide refrigerating system belongs to refrigeration technology field.The present invention includes valve body, valve seat, valve port, valve rod, spherical valve head, inlet channel member, air inlet duct, inlet chamber, memory spring, driver plate, driver plate connecting rod, air inlet pipe, escape pipe.The valve body right-hand member connects air inlet pipe, the valve body left end connects escape pipe, valve port is positioned at the valve seat center, inlet chamber is by being arranged at air inlet duct and the air inlet pipe conducting on the inlet channel member, memory spring is placed in the inlet chamber, and both ends of the spring contacts with the driver plate connecting rod with valve seat, and spherical valve head is fixed on the valve rod left end, valve rod right-hand member and driver plate connecting rod are fixed, and driver plate connecting rod right-hand member is fixed on the driver plate left surface center.The present invention can reach optimum pressure at the pressure in the automatic adjustments of gas cooler of different gas cooler exit temperature in the critical-cross carbon dioxide refrigeration system, make the Energy Efficiency Ratio of system's operation reach maximum.
Description
Technical field
The present invention relates to a kind of refrigeration system restricting element, specifically a kind of high pressure control valve of transcritical carbon dioxide refrigerating system belongs to refrigeration technology field.
Background technology
Industrial quarters uses CFC class and HFC class cold-producing medium as refrigeration working medium always for a long time, and the former can damage the ozone layer, and the latter can produce tangible greenhouse effects, and artificial synthetic refrigeration working medium all damages natural environment inevitably.Carbon dioxide is a kind of natural refrigerant, can take from the Nature or industrial discharge waste gas, help environmental protection, the critical-cross carbon dioxide performance of refrigeration circulation is also suitable with traditional freon refrigeration circulation simultaneously, so carbon dioxide refrigerating system is thought to have very big development prospect widely.
The control characteristic of the high-low pressure of critical-cross carbon dioxide refrigeration system and common compression-type refrigerating system have bigger different.Compression-type refrigerating system commonly used at present adopts subcritical cycle, no matter be high-pressure side or low-pressure side, temperature and pressure are all closely related.In unit running process, mainly be to control evaporating pressure and temperature by regulating restricting element, improve the operating efficiency of system.For the high-pressure side, condensation temperature mainly depends on the temperature and the flow of cooling medium, condensing pressure is corresponding one by one with condensation temperature, and on high-tension side pressure is condensing pressure, therefore on high-tension side pressure depends on the temperature and the flow of cooling medium basically, does not need to control specially in system.For the critical-cross carbon dioxide refrigeration system, what its high-pressure side cold-producing medium took place is not condensation process, but the cooling procedure of supercritical gas, its pressure and temperature are two independently variablees.Although therefore temperature is subjected to the qualification of cooling medium, pressure but directly is not restricted.In the critical-cross carbon dioxide refrigeration system, high side pressure can reach 70～150bar, is 7～10 times of refrigerating plant commonly used.On high-tension side in addition pressure characteristic has very big influence for the operating efficiency of system, has an optimum pressure for a certain operating mode, makes systematic energy efficiency ratio reach maximum.Therefore no matter be to consider, in the critical-cross carbon dioxide refrigeration system, all can the device of directly high side pressure being regulated be set as common subcritical cycle refrigeration system from security or from thermal efficiency.Controlled in order to guarantee critical-cross carbon dioxide refrigerating plant high side pressure, can adopt throttle mechanism to control on high-tension side pressure.When high side pressure is too high, increases the aperture of throttle mechanism, and when pressure is on the low side, then reduce aperture.
Find by prior art documents: the Chinese patent publication number is CN1737472A, open day is on February 22nd, 2006, patent name is: critical-cross carbon dioxide refrigerating system restriction sleeve, a kind of restriction sleeve of adjustable throttle amount is proposed, its core is: adopt a kind of mechanical restriction sleeve that has the internal bypass function as restricting element, its flow can be realized according to the variation of restriction sleeve import high pressure regulating automatically.A this in-house main restriction sleeve and auxiliary restriction sleeve of being provided with, main restriction sleeve is in open mode all the time, and the variation of flow is regulated by auxiliary restriction sleeve, controls pressure in the gas cooler by regulating the flow size.Restriction sleeve in this scheme must change the pretightning force of spring with the adjusting bolt for the gas cooler exit temperature that changes, adjust optimum pressure with this, do not have self-regulating function, therefore system conditions is very limited in actual applications.
Up to the present, the critical-cross carbon dioxide refrigeration system does not also appear being applicable to, adopt novel temperature-sensing control element to adjust system optimal pressure automatically, do not need to introduce in addition the adjustable throttle mechanism that drives control mode at different gas cooler exit temperature.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, design provides a kind of high pressure control valve of transcritical carbon dioxide refrigerating system, can be with the variation automatic regulating system optimum pressure of gas cooler exit temperature, regulate highly sensitively, have higher reliability.
The present invention is achieved by the following technical solutions, and the high pressure control valve of transcritical carbon dioxide refrigerating system that the present invention proposes comprises: valve body, valve seat, valve port, valve rod, spherical valve head, driver plate, memory spring, driver plate connecting rod, inlet channel member, air inlet duct, centre bore, centring ring, air inlet pipe, escape pipe, inlet chamber, sealing block.The valve body right-hand member connects air inlet pipe, directly act on the driver plate right flank by the gas cooler in the kind of refrigeration cycle by the refrigerant pressure that air inlet pipe flows into, produce active force left, inlet chamber is by being arranged at air inlet duct and the air inlet pipe conducting on the inlet channel member, the refrigerant pressure that flows into inlet chamber acts on the left side of driver plate connecting rod, produce active force to the right, memory spring is placed in the inlet chamber, both ends of the spring contacts with the driver plate connecting rod with valve seat respectively, memory spring is experienced after the refrigerant temperature left side to the driver plate connecting rod and is produced to the right active force, valve port is positioned at the center of valve seat, spherical valve head is fixed on the valve rod left end, valve port and spherical valve head constitute minimum flow area---the throttling hypotensive effect plays in throat, valve rod right-hand member and driver plate connecting rod are fixed, driver plate connecting rod right-hand member is fixed on the driver plate left surface center, the driver plate connecting rod inserts from the right-hand member of centre bore, the centre bore right-hand member establishes a sealing block and the driver plate connecting rod closely cooperates, between valve seat and the inlet channel member centring ring is set, the valve seat periphery is embedded with the 3rd sealing ring, inlet channel member periphery is embedded with the 4th sealing ring, valve seat, inlet channel member and centring ring all are fitted on the internal face of valve body, and the valve body left end connects escape pipe.
Be evenly equipped with 12 air inlet ducts on the circumference of inlet channel member, its total circulation area is greater than the area of the valve port on the valve seat.The confined space that inlet channel member and driver plate and driver plate connecting rod constitute is a vacuum state.The driver plate periphery is embedded with first sealing ring; Sealing block hole Nei Chu is embedded with second sealing ring.The memory spring compressive deformation produces the pressure in driver plate left side and the gas pressure on driver plate right side is acted on driver plate simultaneously, and driver plate is stressed and drive valve rod together with spherical valve head move left and right, to close or to open valve port.
Described memory spring adopts marmem to make, and all is in compressive state in the operating condition scope.Marmem is a kind of specific alloy material with memory characteristic, and memory spring can flexiblely automatically be institute's memorized shape under different temperatures.Simultaneously, this material also has super-elasticity, and its dependent variable can be up to 20%, behind the unloading stress, can return to original shape fully.Selected memory spring is that the pressure according to carbon dioxide refrigerating system---temperature characterisitic designs among the present invention, concrete is optimum pressure---the temperature characterisitic that exports according to the carbon dioxide refrigerating system gas cooler, deformation to memory spring---temperature characterisitic designs, and makes it be installed in the active force that is produced by compressive deformation in the choke valve under uniform temperature and length and can make the carbon dioxide refrigerating system high-pressure side reach optimum pressure.Because memory spring is to the high accuracy shape memory characteristic of temperature, and shape restorability fast, will improve degree of regulation greatly used as the temperature-sensing control element of high pressure control valve of the present invention.
High pressure control valve of the present invention is installed between the gas cooler and evaporimeter in the refrigeration system, when refrigeration system is moved, after the cold or supercritical fluid of the mistake that is flowed out by gas cooler flows into high pressure control valve by air inlet pipe, the driver plate right side is produced pressure P
2, flow into inlet chamber by the air inlet duct simultaneously, the driver plate connecting rod left surface that the is positioned at inlet chamber P that also is under pressure
2Effect, the memory spring of placing in the chamber is experienced the refrigerant temperature that is flowed into by gas cooler, will be according to the deformation of self---the telescopic variation corresponding to upstream gas cooler outlet temperature takes place in temperature characterisitic, but because the restriction of driver plate movement travel, memory spring can not freely stretch, therefore compressive deformation will take place, along with the variation of temperature that memory spring is experienced, compressive deformation also correspondingly changes the pressure that driver plate connecting rod left side produces.Core technology of the present invention is: under certain gas cooler exit temperature, and gas pressure P in memory spring and the inlet chamber when the spherical valve head of valve rod left end contacts with valve port
2The F that makes a concerted effort to the right to the generation of driver plate connecting rod
1Pressure P to driver plate
1Just equal optimum pressure.When under a certain gas cooler exit temperature and pressure, the driver plate left side pressure P when valve port is in closed condition
1Greater than driver plate right atrial pressure P
2Valve port keeps closed condition, and along with the running of system compresses machine, the part cold-producing medium that is positioned at the gas-liquid separator of compressor air suction mouth will be sucked into the gas cooler in exhaust outlet of compressor downstream, the gas cooler internal pressure will raise, the pressure P on the driver plate right side that communicates with it
2Also will raise gradually and meet and exceed driver plate left side pressure P
1, also be on high-tension side optimum pressure, driver plate drive this moment valve rod will be moved to the left and open valve port together with spherical valve head, and feasible flow by high pressure control valve increases P rapidly
2To be reduced gradually by elevated pressures, when being reduced to the high-pressure side optimum pressure when following, driver plate will drive valve rod together with the nose heave valve port position that newly moves to of globe valve, close port, but along with high side pressure P
2Again raise and meet and exceed P
1, valve port is very fast can be reopened again, so repeats to open and close the process of valve port, finally makes P
2All the time trend towards P
1, also be that the interior pressure of gas cooler can reach the optimum pressure under the corresponding outlet temperature.Therefore, will make the high side pressure of critical-cross carbon dioxide refrigeration system controlled, and make running efficiency of system be in optimum state by the automatic adjusting of high voltage control valve opening.
By above-mentioned adjusting control mode, high pressure control valve of the present invention can the answering system operating condition variation automatically high side pressure is transferred to optimum pressure, than other throttle mechanism, high pressure control valve of the present invention relies on the pressure of system self to drive fully, and built-in memory spring regulates as temperature-sensing control element, also need not any extra valve actuator when widening adjustable range and improving degree of regulation.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the schematic diagram of the inlet channel member of high pressure control valve of the present invention inside.
Fig. 3 is an A-A cutaway view shown in Figure 2.
Among Fig. 1: valve body 1, valve seat 2, valve port 3, valve rod 4a, spherical valve head 4b, driver plate 5, memory spring 6, driver plate connecting rod 7, inlet channel member 8, air inlet duct 9, centre bore 10, centring ring 11, the first sealing rings 12, air inlet pipe 13, escape pipe 14, the three sealing ring 15a, the 4th sealing ring 15b, inlet chamber 16, sealing block 17, the second sealing rings 18.
Among Fig. 2-3: inlet channel member 8, air inlet duct 9, centre bore 10, sealing block 17, the second sealing rings 18.
The specific embodiment
Below in conjunction with accompanying drawing concrete enforcement of the present invention is described further.
As shown in Figure 1, the present invention includes: valve body 1, valve seat 2, valve port 3, valve rod 4a, spherical valve head 4b, driver plate 5, memory spring 6, driver plate connecting rod 7, inlet channel member 8, air inlet duct 9, centre bore 10, centring ring 11, air inlet pipe 13, escape pipe 14, inlet chamber 16, sealing block 17.
Valve body 1 right-hand member connects air inlet pipe 13, directly act on driver plate 5 right flanks by the gas cooler in the kind of refrigeration cycle by the refrigerant pressure that air inlet pipe 13 flows into, produce active force left, inlet chamber 16 is by being arranged at the air inlet duct 9 and air inlet pipe 13 conductings on the inlet channel member 8, the refrigerant pressure that flows into inlet chamber 16 acts on the left side of driver plate connecting rod 7, produce active force to the right, memory spring 6 is placed in the inlet chamber 16, both ends of the spring contacts with driver plate connecting rod 7 with valve seat 2 respectively, memory spring 6 is experienced after the refrigerant temperature left side to driver plate connecting rod 7 and is produced to the right active force, valve port 3 is positioned at the center of valve seat 2, spherical valve head 4b is fixed on valve rod 4a left end, valve port 3 and spherical valve head 4b constitute minimum flow area---the throttling hypotensive effect plays in throat, valve rod 4a right-hand member and driver plate connecting rod 7 are fixing, driver plate connecting rod 7 right-hand members are fixed on the driver plate 5 left surface centers, driver plate connecting rod 7 inserts from the right-hand member of centre bore 10, centre bore 10 right-hand members are established a sealing block 17 and are closely cooperated with driver plate connecting rod 7, one centring ring 11 is set between valve seat 2 and the inlet channel member 8, valve seat 2 peripheries are embedded with the 3rd sealing ring 15a, inlet channel member 8 peripheries are embedded with the 4th sealing ring 15b, valve seat 2, inlet channel member 8 and centring ring 11 all are fitted on the internal face of valve body 1, and valve body 1 left end connects escape pipe 14.
Be evenly equipped with 12 air inlet ducts 9 on the circumference of the inlet channel member 8 shown in Fig. 2,3, its total circulation area is greater than the area of the valve port on the valve seat 23.Memory spring 6 adopts marmem to make, and all is in compressive state in the operating condition scope.Inlet channel member 8 is a vacuum state with the confined space that driver plate 5 and driver plate connecting rod 7 constitute.Driver plate 5 peripheries are embedded with first sealing ring 12; Sealing block 17 hole Nei Chu are embedded with second sealing ring 18.
When refrigeration system is moved, cold or the supercritical fluid of the mistake that is flowed out by gas cooler flows into high pressure control valve of the present invention by air inlet pipe 13, flow into inlet chamber 16 by air inlet duct 9, driver plate connecting rod 7 left sides are produced pressure, memory spring 6 is experienced the refrigerant temperature that is flowed into by gas cooler, and also the left side to driver plate connecting rod 7 produces pressure.Simultaneously, the refrigerant pressure that is flowed into by air inlet pipe 13 directly acts on the right side of driver plate 5.When gas cooler exports under a certain temperature and pressure, driver plate 5 right atrial pressures are less than left side pressure, valve port 3 is in closed condition, continuous operation along with the system compresses machine, gas cooler internal high pressure gas pressure will raise, the pressure on driver plate 5 right sides also raises gradually and meets and exceeds the pressure in left side at this moment, valve rod 4a will be moved to the left and open valve port 3 together with spherical valve head 4b this moment, feasible flow by high pressure control valve increases rapidly, high side pressure will be reduced gradually by elevated pressures, when the pressure on driver plate 5 right sides during less than the pressure in left side, driver plate 5 will drive valve rod 4a and re-move to valve port 3 together with spherical valve head 4b, make high pressure control valve be in closed condition, be elevated to once more when equating with gas cooler pressure up to the right atrial pressure of driver plate 5 with driver plate 5 left side pressure, valve port 3 begins again to open, so continue to repeat the opening and closing process of valve port 3, make the pressure on driver plate 5 right sides trend towards the pressure in valve port 3 closed condition underdrive plates 5 left sides all the time, because under valve port 3 closed conditions, the suffered pressure in driver plate 5 left sides is designed to optimum pressure, so the pressure in the gas cooler can reach the optimum pressure under the corresponding outlet temperature.
The present invention can reach optimum pressure at the pressure in the automatic adjustments of gas cooler of different gas cooler exit temperature in carbon dioxide refrigerating system, make the Energy Efficiency Ratio of system's operation reach maximum.The present invention does not need to introduce extra driving control mode, but has used memory spring that shape memory alloy material makes as temperature-sensing control element, as driving force, has realized that automation completely regulates with system self pressure.Global design compactness of the present invention, simple in structure, to regulate highly sensitively, good airproof performance has higher reliability.
Claims (5)
1, a kind of high pressure control valve of transcritical carbon dioxide refrigerating system, comprise: valve body (1), valve seat (2), valve port (3), valve rod (4a), spherical valve head (4b), driver plate (5), memory spring (6), driver plate connecting rod (7), inlet channel member (8), air inlet duct (9), centre bore (10), centring ring (11), air inlet pipe (13), escape pipe (14), inlet chamber (16), sealing block (17), it is characterized in that: valve body (1) right-hand member connects air inlet pipe (13), directly act on driver plate (5) right flank by the gas cooler in the kind of refrigeration cycle by the refrigerant pressure that air inlet pipe (13) flows into, produce active force left, inlet chamber (16) is by being arranged at the air inlet duct (9) and air inlet pipe (13) conducting on the inlet channel member (8), the refrigerant pressure that flows into inlet chamber (16) acts on the left side of driver plate connecting rod (7), produce active force to the right, memory spring (6) is placed in the inlet chamber (16), memory spring (6) two ends contact with driver plate connecting rod (7) with valve seat (2) respectively, memory spring (6) is experienced after the refrigerant temperature left side to driver plate connecting rod (7) and is produced to the right active force, valve port (3) is positioned at the center of valve seat (2), spherical valve head (4b) is fixed on valve rod (4a) left end, valve port (3) and spherical valve head (4b) constitute minimum flow area---the throttling hypotensive effect plays in throat, valve rod (4a) right-hand member and driver plate connecting rod (7) are fixing, driver plate connecting rod (7) right-hand member is fixed on driver plate (5) the left surface center, driver plate connecting rod (7) inserts from the right-hand member of centre bore (10), centre bore (10) right-hand member is established a sealing block (17) and is closely cooperated with driver plate connecting rod (7), between valve seat (2) and the inlet channel member (8) centring ring (11) is set, valve seat (2) periphery is embedded with the 3rd sealing ring (15a), inlet channel member (8) periphery is embedded with the 4th sealing ring (15b), valve seat (2), inlet channel member (8) and centring ring (11) all are fitted on the internal face of valve body (1), and valve body (1) left end connects escape pipe (14).
2, high pressure control valve of transcritical carbon dioxide refrigerating system according to claim 1 is characterized in that described memory spring (6) adopts marmem to make, and all is in compressive state in the operating condition scope.
3, high pressure control valve of transcritical carbon dioxide refrigerating system according to claim 1, it is characterized in that being evenly equipped with 12 air inlet ducts (9) on the circumference of described inlet channel member (8), its total circulation area is greater than the area of the valve port (3) on the valve seat (2).
4, high pressure control valve of transcritical carbon dioxide refrigerating system according to claim 1 is characterized in that described inlet channel member (8) and the confined space that driver plate (5) and driver plate connecting rod (7) constitute are vacuum state.
5, high pressure control valve of transcritical carbon dioxide refrigerating system according to claim 1 is characterized in that described driver plate (5) periphery is embedded with first sealing ring (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100407099A CN100554831C (en) | 2008-07-17 | 2008-07-17 | High pressure control valve of transcritical carbon dioxide refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100407099A CN100554831C (en) | 2008-07-17 | 2008-07-17 | High pressure control valve of transcritical carbon dioxide refrigerating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101315234A CN101315234A (en) | 2008-12-03 |
| CN100554831C true CN100554831C (en) | 2009-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2008100407099A Expired - Fee Related CN100554831C (en) | 2008-07-17 | 2008-07-17 | High pressure control valve of transcritical carbon dioxide refrigerating system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102283284B (en) * | 2011-06-16 | 2013-04-03 | 上海理工大学 | Transcritical carbon dioxide heat pump milk disinfecting and cooling system and method |
| US10830372B1 (en) | 2019-06-20 | 2020-11-10 | Hamilton Sunstrand Corporation | Pneumatic controllers, pneumatically controlled inline valves, and methods of cooling pneumatic controllers |
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| CN101315234A (en) | 2008-12-03 |
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Granted publication date: 20091028 Termination date: 20180717 |