CN112879600A - Reversing valve based on rotary valve core and refrigerating and heating system thereof - Google Patents
Reversing valve based on rotary valve core and refrigerating and heating system thereof Download PDFInfo
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- CN112879600A CN112879600A CN202110261897.3A CN202110261897A CN112879600A CN 112879600 A CN112879600 A CN 112879600A CN 202110261897 A CN202110261897 A CN 202110261897A CN 112879600 A CN112879600 A CN 112879600A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 19
- 230000001681 protective effect Effects 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 57
- 239000003507 refrigerant Substances 0.000 claims description 38
- 238000005057 refrigeration Methods 0.000 claims description 13
- 230000005494 condensation Effects 0.000 claims description 10
- 238000009833 condensation Methods 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- 238000004781 supercooling Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
- F16K11/085—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug
- F16K11/0856—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug having all the connecting conduits situated in more than one plane perpendicular to the axis of the plug
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
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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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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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
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention relates to a reversing valve based on a rotary valve core and a refrigerating and heating system thereof. The reversing valve based on the rotary valve core comprises a valve body, an end cover, the valve core, a motor and a motor protective cover, wherein the end cover is arranged on one side of the valve body; the motor can drive the valve core to rotate to realize the reversing between the interfaces; the motor protective cover is connected with the valve body, the motor is arranged in the motor protective cover, and the motor protective cover is provided with an electric connector which is connected with the motor. The beneficial effects are as follows: the reversing valve has the advantages that the valve core of the reversing valve rotates under the driving of the motor to realize the reversing of the inlet and the outlet, and the reversing valve is simple in structure, convenient to operate, good in working stability, accurate in control, good in sealing performance and high-pressure resistant.
Description
Technical Field
The invention relates to the field of refrigeration, in particular to a reversing valve based on a rotary valve core and a refrigeration and heating system thereof.
Background
The reversing valve is a control valve with a plurality of inlets and outlets, the inlets and outlets are communicated with an external pipeline, the reversing of fluid circulation can be realized through the valve core, and the reversing valve is an indispensable part in refrigeration equipment. In the refrigerating and heating system, the reversing valve plays a role in refrigerating and heating conversion, and the refrigerating or heating purpose is achieved by changing the direction of the exhaust pipe and the return pipe of the compressor to enter the evaporator and the condenser. The reversing valve is used as an important component of a refrigerating and heating system, and the quality of the reversing valve directly results in the quality of products. The traditional reversing valve adopts a manual or motor driven valve core to realize the reversing operation of fluid, and the manual driving mode is too troublesome and is not beneficial to automatic control. The existing reversing valve with the motor-driven valve core realizes reversing by directly driving the valve core to do linear motion through the motor, but the applicant finds that the reversing valve with the structure is easy to suffer from phenomena of structural failure, blockage or leakage and the like caused by vibration, overlarge pressure and the like.
Therefore, the invention provides the reversing valve based on the rotary valve core, which can realize the reversing of the inlet and the outlet, has simple structure, convenient operation, good working stability, accurate control and high pressure resistance, and the refrigerating and heating system thereof, and is the creative motivation of the invention.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the reversing valve based on the rotary valve core, which can realize the reversing of an inlet and an outlet, has simple structure, convenient operation, good working stability, accurate control and high pressure resistance, and a refrigerating and heating system thereof. The valve core rotates under the drive of the motor to realize the reversing of the inlet and the outlet, and the four-way valve can be expanded into an eight-way valve and a twelve-way valve by setting the length of the valve core. The invention also provides a refrigerating and heating system which can ensure the liquefaction of the refrigerant and high refrigerating efficiency while using the condensing device with small heat exchange area.
The invention provides a reversing valve based on a rotary valve core, which adopts the technical scheme that:
a reversing valve based on a rotary valve core comprises a valve body, an end cover, a valve core, a motor and a motor protective cover, wherein the valve core is arranged in a cavity of the valve body; the motor can drive the valve core to rotate to realize the reversing between the interfaces; the motor protective cover is connected with the valve body, the motor is arranged in the motor protective cover, and the motor protective cover is provided with an electric connector which is connected with the motor.
Preferably, the electrical connector is a quad-sealed connector.
Preferably, one end of the valve core is connected with the motor through a gear assembly.
Preferably, the valve body is connected with the end cover through a screw, and the motor protective cover is connected with the valve body through a screw;
an O-shaped sealing ring is arranged at the joint of the motor protective cover and the valve body, and an O-shaped sealing ring is arranged at the joint of the end cover and the valve body.
Preferably, the end cover is provided with a pin shaft, the valve core is provided with a pin shaft hole, and the pin shaft hole can be mutually matched and connected;
the reversing valve further comprises a motor flange and a motor flange cover, and the connecting assembly is arranged between the motor flange and the motor flange cover.
Preferably, the valve core is a sheet structure which is hermetically matched with the cavity of the valve body.
Preferably, a position sensor is arranged on the end cover and used for detecting the rotating position of the valve core.
Preferably, the valve core comprises a first row of interfaces and a second row of interfaces, an annular ring hermetically matched with the inner cavity of the valve body is arranged on the valve core between the first row of interfaces and the second row of interfaces, and the annular ring is used for separating the first row of interfaces and the second row of interfaces; the first row of interfaces and the second row of interfaces comprise first interfaces, second interfaces, third interfaces and fourth interfaces to form the eight-way reversing valve.
A refrigeration and heating system comprising the reversing valve based on the rotary valve core comprises a compressor, the reversing valve, a condensing assembly, a liquid storage device and an evaporator which are sequentially connected, wherein the reversing valve is the reversing valve based on the rotary valve core;
the condensation assembly comprises a kinetic energy pneumatic converter, a condensation device and a gas-liquid separator, the kinetic energy pneumatic converter comprises an air inlet interface, an air outlet interface and an air return interface, the air inlet interface is connected with an exhaust end of the compressor, the air outlet interface is connected with an air inlet end of the condensation device, the air return interface is connected with the gas-liquid separator, and a gaseous refrigerant can circulate among the gas-liquid separator, the kinetic energy pneumatic converter and the condensation device.
Preferably, the air inlet interface end is provided with an air inlet flow deflector, and an air gap is formed between the air inlet flow deflector and the shell;
a high liquid level sensor and a low liquid level sensor are arranged in the gas-liquid separator, the gas-liquid separator is connected with the liquid storage device, and an electronic expansion valve is arranged between the gas-liquid separator and the liquid storage device.
The implementation of the invention comprises the following technical effects:
the reversing valve based on the rotary valve core can realize reversing of an inlet and an outlet, has the advantages of simple structure, convenience in operation, good working stability, accurate control, good sealing property and high pressure resistance, the valve core rotates under the driving of a motor to realize reversing of the inlet and the outlet, and the four-way valve can be expanded into an eight-way valve and a twelve-way valve by setting the length of the valve core, so that the reversing valve can bear the high pressure of 0-100 MPA.
The case both ends homoenergetic is limited a bit at motor drive end and end cover end, compares in traditional butterfly valve structure, when rotating or bearing high pressure, can not produce based on objective reasons such as case dead weight, refrigerant pressure and warp to can not cause the situation such as structural failure, the card is died or is revealed in the switching-over, more durable.
The electric connector is arranged on the motor protection cover, and an external power supply is connected through the electric connector, so that high-voltage power utilization and low-voltage power utilization can be separated, and the power utilization is safer; the influence of the self weight of the external cable on the motor interface can be avoided, and the maintenance is easier.
The setting of position sensor can let the user know the circulation state between four interfaces of present switching-over valve, and it is more convenient to use, can also avoid the maloperation.
The refrigeration and heating system comprises a reversing valve based on a rotary valve core and a kinetic energy pneumatic converter, can precisely reverse, can change a low-speed unidirectional flowing refrigerant in the existing system into a high-speed circulating flowing state, enables the gaseous refrigerant in a gas-liquid separator to be repeatedly circulated and condensed, reduces the condensing pressure, and thus improves the heat exchange and condensation efficiency of the system; and the supercooling degree of the liquid refrigerant can be increased, and the refrigeration efficiency of the system is improved.
Drawings
Fig. 1 is a schematic cross-sectional view of a rotary valve core-based directional control valve according to an embodiment of the present invention.
Fig. 2 is a schematic sectional structure diagram of the valve core and the motor.
Fig. 3 is a side view schematic diagram of a rotary spool based directional valve.
Fig. 4 is a schematic diagram of the refrigerant circulation state before reversing of the reversing valve based on the rotary valve core.
Fig. 5 is a schematic diagram of the refrigerant flowing state after the reversing valve based on the rotary valve core is reversed.
Fig. 6 is a schematic diagram of a refrigerating and heating system comprising a reversing valve based on a rotary valve core.
Fig. 7 is a schematic structural view of the kinetic energy pneumatic converter.
In the figure: 1. a valve body; 2. a valve core; 3. a motor; 4. a connecting assembly; 5. a motor protective cover; 6. an electrical connector; 7. a motor flange; 8. a motor flange cover; 9. a pin shaft; 10. a screw; an O-shaped seal ring; 12. a first row of interfaces; 13. a second row of interfaces; 14. a pin shaft hole; 15. an end cap; 16. a first interface; 17. a second interface; 18. a third interface; 19. a fourth interface; 20. a compressor; 21. a condensing assembly; 210. a kinetic energy pneumatic converter; 211. an air inlet interface; 212. an air outlet interface; 213. an air return interface; 214. an air inlet flow deflector; 215. air gaps; 216. a gas-liquid separator; 217. a high level sensor; 218. a low level sensor; 219. a condensing unit; 22. a reservoir; 23. an electronic expansion valve; 24. an evaporator; 25. a reversing valve.
Detailed Description
The present invention will be described in detail below with reference to embodiments and drawings, it being noted that the described embodiments are only intended to facilitate the understanding of the present invention, and do not limit it in any way.
Referring to fig. 1 and 2, the reversing valve based on the rotary valve core in the embodiment includes a valve body 1, an end cover 15, a valve core 2, a motor 3 and a motor protection cover 5, wherein the valve core 2 is arranged in a cavity of the valve body 1, the end cover 15 is installed at one side of the valve body 1, one end of the valve core 2 is connected with the motor 3 through a connecting assembly 4, and the other end of the valve core is connected with the end cover 15 through a pin shaft 9 and a pin shaft hole 14 which are matched with each other; the motor 3 can drive the valve core 2 to rotate to realize the reversing between the interfaces; the motor protective cover 5 is connected with the valve body 1, the motor 3 is arranged in the motor protective cover 5, the motor protective cover 5 is provided with an electric connector 6, and the electric connector 6 is connected with the motor 3. The switching-over valve of this embodiment, 2 both ends homoenergetic of case can be held 3 ends of motor and end cover 15 ends spacing, compare in traditional butterfly valve structure, when rotating or bearing high pressure, can not produce based on objective reasons such as 2 dead weights of case, refrigerant pressure and warp to can not cause the situation such as structural failure, the card of switching-over is dead or reveal, more durable. The electric connector 6 is arranged on the motor protective cover 5, and the electric connector 6 is connected with an external power supply, so that high-voltage power utilization and low-voltage power utilization can be separated, and the power utilization is safer; the influence of the self weight of the external cable on the interface of the motor 3 can be avoided, and the maintenance is easier.
Preferably, the electric connector 6 is a four-core sealing connector, and the four-core sealing connector can ensure the sealing performance of the reversing valve and is safe and durable. One end of the valve core 2 is connected with the motor 3 through a gear assembly, the control precision of the gear transmission mode is high, the rotation angle of the valve core 2 can be accurately controlled, and accurate reversing is achieved. The valve body 1 is connected with the end cover 15 through the screw 10, the motor protective cover 5 is connected with the valve body 1 through the screw, the connection mode of the screw 10 is simple, and the manufacturing cost is low. The connection of the motor protective cover 5 and the valve body 1 is provided with an O-shaped sealing ring 11, the connection of the end cover 15 and the valve body 1 is provided with the O-shaped sealing ring, the sealing performance of the whole reversing valve is guaranteed, water vapor and dust are prevented from entering the valve body 1, and the service life of the reversing valve can be prolonged. The end cover 15 is provided with a position sensor, the position sensor is used for detecting the rotating position of the valve core 2, and the arrangement of the position sensor can enable a user to know the circulating state between four interfaces of the current reversing valve, so that the reversing valve is more convenient to use, and misoperation can be avoided. Specifically, the end cover 15 is provided with a pin shaft 9, the valve core 2 is provided with a pin shaft hole 14, the pin shaft 9 and the pin shaft hole 14 can be mutually matched and connected, the other end of the valve core 2 is limited, the influence caused by deflection deformation of the valve core 2 due to self gravity is avoided, and the stability of the valve core 2 during reversing is ensured.
Referring to fig. 1 and 2, the reversing valve further comprises a motor flange 7 and a motor flange cover 8, the connecting assembly 4 is arranged between the motor flange 7 and the motor flange cover 8, the motor flange 7 and the motor flange cover 8 can both play a role in fixing the valve core 2, the connecting assembly 4 is arranged between the motor flange 7 and the motor flange cover 8, and the connecting assembly 4 is prevented from being interfered by foreign matters in the cavity of the valve body 1. The valve core 2 is a sheet structure hermetically matched with the cavity of the valve body 1, the valve core 2 with the sheet structure is simple in structure and low in manufacturing cost, and compared with a complex butterfly valve structure, the butterfly valve is simple in structure and durable.
Referring to fig. 1 to 5, the valve core 2 may include more than one row of ports (including one row), and several rows may be specifically provided, and may be provided according to actual needs. Fig. 1 shows two rows of ports as an illustration, which respectively include a first row of ports 12 and a second row of ports 13, where the first row of ports 12 and the second row of ports 13 both include a first port 16, a second port 17, a third port 18 and a fourth port 19, an annular ring hermetically fitted with an inner cavity of the valve body 1 is disposed on the valve element 2 between the first row of ports 12 and the second row of ports 13, and the annular ring is used to separate the first row of ports 12 from the second row of ports 13, so as to form an eight-way reversing valve. In the position corresponding to the valve element 2 shown in fig. 4, the first port 16 and the second port 17 are connected, and the third port 18 and the fourth port 19 are connected, whereas in the position corresponding to the valve element 2 shown in fig. 5, the first port 16 and the fourth port 19 are connected, and the second port 17 and the third port 18 are connected.
Referring to fig. 6, the present embodiment further provides a refrigeration and heating system including the above-mentioned reversing valve based on the rotary valve core, the refrigeration and heating system includes a compressor 20, a reversing valve 25, a condensing assembly 21, a liquid reservoir 22 and an evaporator 24, which are connected in sequence, and the reversing valve 25 is the above-mentioned reversing valve based on the rotary valve core. The direction valve 25 provided in the present embodiment is resistant to high pressure and is suitable for a carbon dioxide refrigerant, a freon refrigerant, or an ammonia refrigerant.
Referring to fig. 6 and 7, the condensing assembly 21 includes a kinetic energy pneumatic converter 210, a condensing device 219, and a gas-liquid separator 216, the kinetic energy pneumatic converter 210 includes an air inlet 211, an air outlet 212, and an air return 213, the air inlet 211 is connected to an air outlet of the compressor 20, the air outlet 212 is connected to an air inlet of the condensing device 219, the air return 213 is connected to the gas-liquid separator 216, and the gaseous refrigerant can circulate among the gas-liquid separator 216, the kinetic energy pneumatic converter 210, and the condensing device 219. The structure changes the low-speed unidirectional flowing refrigerant in the existing system into a high-speed circulating flowing state under the condition of not increasing power, so that the gaseous refrigerant in the gas-liquid separator 216 is repeatedly circulated and condensed, the condensing pressure is reduced, and the heat exchange and condensation efficiency of the system is improved; and the supercooling degree of the liquid refrigerant can be increased, and the refrigeration efficiency of the system is improved.
Referring to fig. 7, an air inlet guide vane 214 is disposed at the end of the air inlet interface 211, an air gap 215 is formed between the air inlet guide vane 214 and the housing, the air gap 215 is a circular air gap, and the air inlet guide vane 214 blocks the refrigerant and then enters the end of the air outlet interface 212 from a smaller air gap 215. The inner diameter of the air return interface 213 is a gradually contracting and narrowing circular truncated cone structure. The air outlet interface 212 end sequentially comprises a circular truncated cone structure with gradually contracted and narrowed inner diameter, a cylindrical structure with the same inner diameter and a circular truncated cone structure with gradually expanded and widened inner diameter. When the refrigerant flows through the pipe diameter structure, when the refrigerant passes through the reduced flow cross section, the flow velocity of the fluid is increased, the flow velocity is inversely proportional to the flow cross section area, and when the refrigerant passes through the expanded flow cross section, the flow velocity of the fluid is decreased, so that pressure difference is generated, an adsorption effect is generated, and the refrigerant at the compressor 20 end and the refrigerant at the return air end continuously enter the condensing device 219 from the air outlet end.
A high liquid level sensor 217 and a low liquid level sensor 218 are arranged in the gas-liquid separator 216, the gas-liquid separator 216 is connected with the reservoir 22, and an electronic expansion valve 23 is arranged between the gas-liquid separator 216 and the reservoir 22. When the high level sensor in the gas-liquid separator 216 detects the liquid level, the electronic expansion valve 23 is controlled to be opened, the liquid refrigerant in the gas-liquid separator 216 flows into the reservoir 22, when the low level sensor in the gas-liquid separator 216 detects the liquid level, the electronic expansion valve 23 is controlled to be closed, and the gaseous refrigerant in the gas-liquid separator 216 enters the condensing device 219 through the air return interface 213 of the kinetic energy pneumatic converter 210 to be condensed continuously.
Referring to fig. 6 and 7, when the system operates to refrigerate, the compressor 20 is turned on to press the compressed gas into the condensing device 219, and when the compressed gas passes through the kinetic energy pneumatic converter 210, a higher flow rate is generated at the outlet port 212 end of the kinetic energy pneumatic converter 210 through the air gap 215 between the inlet guide vane 214 and the housing, so that an adsorption effect is generated, a pressure difference is generated between the return port 213 end of the kinetic energy pneumatic converter 210 and the outlet port 212 end of the kinetic energy pneumatic converter 210, and the gaseous refrigerant in the gas-liquid separator 216 is sucked into the condensing device 219 to be condensed. In the working process, extra power is not required to be provided, namely, a power component such as the motor 3 is not required to be added, and the circulating work can be realized by completely depending on the pressure difference generated by the system, so that the liquefaction amount of the refrigerant is improved, the refrigerant is fully liquefied, and the refrigeration efficiency of the condenser is further improved. Meanwhile, since the gaseous refrigerant in the gas-liquid separator 216 is continuously pumped out, the pressure in the gas-liquid separator 216 is reduced, and at this time, a part of the liquid refrigerant is flashed into gas, so as to maintain the balance of the overall ambient pressure in the gas-liquid separator 216. The part of liquid refrigerant absorbs heat in the process of flashing into gas, so that the temperature of the residual liquid refrigerant in the gas-liquid separator 216 is reduced, that is, the supercooling degree of the residual liquid refrigerant is increased, and the refrigeration efficiency of the condenser is further improved.
Particularly, in order to sufficiently liquefy the refrigerant, the conventional solution is to increase the heat exchange area of the condensing device 219 to store the condensed liquid and further perform a liquid seal function, so that the area of the condensing device 219 is too large, auxiliary equipment such as a fan and a water pump is also large, the cost is high, and the occupied area is increased; in addition, when the traditional condenser is used, in hot summer, when the condensing effect is poor and liquid seal cannot be formed, part of gas enters the expansion valve to reduce the refrigerating efficiency in summer, and the compressor 20 can be stopped due to failure. Moreover, the existing condenser has the upper end for air inlet and the lower end for liquid outlet, and the refrigerant has low flow velocity in the condensing device 219 and poor condensing effect. The condenser with the kinetic energy pneumatic converter 210, the condensing device 219 and the gas-liquid separator 216 circulating changes the low-speed unidirectional flowing refrigerant in the existing system into the high-speed circulating flowing state under the condition of not increasing power, so that the gaseous refrigerant in the gas-liquid separator 216 is repeatedly circulated and condensed, and the refrigeration efficiency of the system is improved. Refrigerant entering the accumulator 22 is prevented from containing gas by the cooperation of the electronic expansion valve 23 with the high level sensor 217 and the low level sensor 218.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The utility model provides a switching-over valve based on rotation type case, includes valve body, end cover, case, motor and motor visor, the case sets up in the cavity of valve body, the end cover is installed one side of valve body, its characterized in that: one end of the valve core is connected with the motor through a connecting assembly, and the other end of the valve core is connected with the end cover through a pin shaft and a pin shaft hole which are matched with each other; the motor can drive the valve core to rotate to realize the reversing between the interfaces; the motor protective cover is connected with the valve body, the motor is arranged in the motor protective cover, and the motor protective cover is provided with an electric connector which is connected with the motor.
2. The rotary valve cartridge-based reversing valve of claim 1, wherein: the electrical connector is a four-core sealed connector.
3. The rotary valve cartridge-based reversing valve of claim 1, wherein: one end of the valve core is connected with the motor through a gear assembly.
4. The rotary valve cartridge-based reversing valve of claim 1, wherein: the valve body is connected with the end cover through a screw, and the motor protective cover is connected with the valve body through a screw;
the motor protection cover is provided with the O type sealing washer with the junction of valve body, the end cover with the junction of valve body is provided with the O type sealing washer.
5. The rotary valve cartridge-based reversing valve of claim 1, wherein: the end cover is provided with a pin shaft, the valve core is provided with a pin shaft hole, and the pin shaft hole can be mutually matched and connected;
the reversing valve further comprises a motor flange and a motor flange cover, and the connecting assembly is arranged between the motor flange and the motor flange cover.
6. The rotary valve cartridge-based reversing valve of claim 1, wherein: the valve core is a sheet structure hermetically matched with the cavity of the valve body.
7. The rotary valve cartridge-based reversing valve of claim 1, wherein: and the end cover is provided with a position sensor, and the position sensor is used for detecting the rotating position of the valve core.
8. The rotary valve cartridge-based reversing valve of claim 1, wherein: the valve core comprises a first row of interfaces and a second row of interfaces, an annular ring hermetically matched with the inner cavity of the valve body is arranged on the valve core between the first row of interfaces and the second row of interfaces, and the annular ring is used for separating the first row of interfaces from the second row of interfaces; the first row of interfaces and the second row of interfaces comprise first interfaces, second interfaces, third interfaces and fourth interfaces to form the eight-way reversing valve.
9. A refrigeration and heating system comprising the rotary valve cartridge-based reversing valve of any one of claims 1-8, wherein: the refrigerating and heating system comprises a compressor, a reversing valve, a condensing assembly, a liquid storage device and an evaporator which are connected in sequence, wherein the reversing valve is the reversing valve based on the rotary valve core according to any one of claims 1 to 8;
the condensation assembly comprises a kinetic energy pneumatic converter, a condensation device and a gas-liquid separator, the kinetic energy pneumatic converter comprises an air inlet interface, an air outlet interface and an air return interface, the air inlet interface is connected with an exhaust end of the compressor, the air outlet interface is connected with an air inlet end of the condensation device, the air return interface is connected with the gas-liquid separator, and a gaseous refrigerant can circulate among the gas-liquid separator, the kinetic energy pneumatic converter and the condensation device.
10. A cooling and heating system according to claim 9, wherein: the air inlet connector end is provided with an air inlet flow deflector, and an air gap is formed between the air inlet flow deflector and the shell;
the gas-liquid separator is internally provided with a high liquid level sensor and a low liquid level sensor and is connected with the liquid storage device, and an electronic expansion valve is arranged between the gas-liquid separator and the liquid storage device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110261897.3A CN112879600A (en) | 2021-03-10 | 2021-03-10 | Reversing valve based on rotary valve core and refrigerating and heating system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110261897.3A CN112879600A (en) | 2021-03-10 | 2021-03-10 | Reversing valve based on rotary valve core and refrigerating and heating system thereof |
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| CN214466311U (en) * | 2021-03-10 | 2021-10-22 | 北京市京科伦工程设计研究院有限公司 | Reversing valve based on rotary valve core and refrigerating and heating system thereof |
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2021
- 2021-03-10 CN CN202110261897.3A patent/CN112879600A/en active Pending
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|---|---|---|---|---|
| US6308739B1 (en) * | 1998-02-13 | 2001-10-30 | Quality Controls, Inc. | Flexible rotor valve seal and ganged rotor valve incorporating same |
| CN110319613A (en) * | 2019-07-22 | 2019-10-11 | 北京市京科伦冷冻设备有限公司 | Single stage carbon dioxide refrigeration system |
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