CN111426089A - Motor drive four-way reversing valve and carbon dioxide refrigerating and heating system - Google Patents
Motor drive four-way reversing valve and carbon dioxide refrigerating and heating system Download PDFInfo
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- CN111426089A CN111426089A CN202010297590.4A CN202010297590A CN111426089A CN 111426089 A CN111426089 A CN 111426089A CN 202010297590 A CN202010297590 A CN 202010297590A CN 111426089 A CN111426089 A CN 111426089A
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- way reversing
- reversing valve
- positioning
- valve
- positioning boss
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000010438 heat treatment Methods 0.000 title claims abstract description 28
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 21
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims description 18
- 238000003860 storage Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 11
- 238000005057 refrigeration Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 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
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction 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
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/26—Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion 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
- 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
- F25B49/025—Motor control arrangements
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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
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention relates to a motor-driven four-way reversing valve and a carbon dioxide refrigerating and heating system. The invention discloses a motor-driven four-way reversing valve, which comprises a valve body, a left end cover, a right end cover, a positioning bearing, a motor and a movable valve core, wherein the motor is arranged at one end of the valve body; when the motor rotates, the movable valve core can be driven to move left and right through the screw rod, and the connection or the closing of the connection hole is controlled. The beneficial effects are as follows: the detachable structure of the four-way reversing valve is convenient to maintain and check faults. The positioning bearing is arranged, so that deflection deformation of the valve member due to self weight can be prevented, and the axis of the valve core is ensured to be horizontal during reversing. The movable valve core is moved left and right in a mode of driving the screw rod through the motor, so that the operation precision is higher, the reversing is more accurate, and the operation stability is ensured.
Description
Technical Field
The invention relates to the field of mechanical structures, in particular to a motor-driven four-way reversing valve and a carbon dioxide refrigerating and heating system.
Background
In the refrigerating and heating system, the four-way reversing valve plays a role in refrigerating and heating conversion, and the refrigerating and heating purposes are achieved by changing the directions of the exhaust pipe and the return pipe of the compressor entering the evaporator and the condenser. The four-way reversing valve is used as an important component of a refrigerating and heating system, and the quality of the four-way reversing valve directly results in the quality of products. The traditional four-way reversing valve adopts a manual or electromagnetic driving 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 four-way reversing valve driven by electromagnetism has the following defects: 1) after the conversion from refrigeration to heating is finished, the electromagnetic coil is still electrified, so that energy is not saved, and the electromagnetic coil is easy to burn due to long electrifying time; 2) the electromagnetic pilot valve is adopted to control the pressure difference at two sides of the slide valve to realize the reversing, the intermediate links are more, and the slide valve is easy to be locked and is not reversed; 3) besides the electromagnetic coil, other parts are more in number and complex in structure; 4) the assembly process is complex, particularly the welding parts are more, the requirement on welding equipment is high, and the quality is difficult to control; 5) the material and processing costs are high.
Therefore, the invention provides the motor-driven four-way reversing valve and the carbon dioxide refrigerating and heating system which can realize outlet reversing, have simple structure, convenient operation, good working stability, accurate control and convenient maintenance, and is the innovation and motivation of the invention.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the motor-driven four-way reversing valve and the carbon dioxide refrigerating and heating system which realize outlet reversing, have simple structure, convenient operation, good working stability, accurate control and convenient maintenance.
The invention provides a motor-driven four-way reversing valve, which adopts the technical scheme that:
a motor-driven four-way reversing valve comprises a valve body, a left end cover, a right end cover, a positioning bearing, a motor and a movable valve core, wherein the left end cover and the right end cover are respectively arranged at two ends of the valve body; when the motor rotates, the movable valve core can be driven to move left and right through the screw rod, and the connection or closing state of the connection hole is controlled.
Preferably, the screw sleeve is connected with the motor shaft through a connecting pin, and the screw sleeve is positioned between the motor and the movable valve core.
Preferably, the positioning rod has enough length, and is always positioned in the inserting hole of the positioning bearing when the movable valve core moves left and right.
Preferably, the movable valve core is integrally formed, the first positioning shaft section and the second positioning shaft section are of circular protruding structures, and the first positioning shaft section and the second positioning shaft section are fixedly connected through a rod-shaped structure.
Preferably, left end cover and right end cover can be dismantled from the valve body, and after dismantling the end cover, location bearing, motor and portable case all can be dismantled from the cavity of valve body.
Preferably, a first positioning shaft section and a second positioning shaft section are arranged on the movable valve core, positioning bosses corresponding to each other up and down are arranged in the valve body, and the first positioning shaft section and the second positioning shaft section are matched with the positioning bosses to realize the conduction or the closing of different interfaces.
Preferably, the first positioning shaft section and the second positioning shaft section are sleeved with sealing gaskets; and the left end cover and the right end cover are both provided with sealing rings.
Preferably, the valve body is provided with a first connecting hole, a second connecting hole, a third connecting hole and a fourth connecting hole, the first connecting hole is arranged at the top of the valve body, and the second connecting hole, the third connecting hole and the fourth connecting hole are arranged on the same side of the valve body; a first positioning boss, a second positioning boss, a third positioning boss and a fourth positioning boss are arranged in the valve body, a fifth positioning boss is arranged on the opposite surface of the first positioning boss, a sixth positioning boss is arranged on the opposite surface of the second positioning boss, a seventh positioning boss is arranged on the opposite surface of the third positioning boss, and an eighth positioning boss is arranged on the opposite surface of the fourth positioning boss; the distance between the first positioning boss and the fifth positioning boss, the distance between the second positioning boss and the sixth positioning boss, the distance between the third positioning boss and the seventh positioning boss, and the distance between the fourth positioning boss and the eighth positioning boss are close to the height of the positioning shaft section of the movable valve core;
when the movable valve core moves to the left end, the first positioning shaft section and the second positioning shaft section are respectively positioned at the positions of the first positioning boss and the third positioning boss, the second connecting hole is communicated with the third connecting hole, and the first connecting hole is communicated with the fourth connecting hole;
when the movable valve core moves to the right end, the first positioning shaft section and the second positioning shaft section are respectively located at the positions of the second positioning boss and the fourth positioning boss, the first connecting hole is communicated with the second connecting hole, and the third connecting hole is communicated with the fourth connecting hole.
The invention also provides a carbon dioxide refrigerating and heating system, which comprises a compressor, a condenser, a liquid storage device and an evaporator which are sequentially communicated through pipelines; the refrigerating and heating system also comprises a first four-way reversing valve, a second four-way reversing valve and a third four-way reversing valve, wherein four outlets of the first four-way reversing valve are respectively connected to an inlet of the condenser, an inlet of the compressor, an outlet of the compressor and an outlet of the evaporator through gas pipelines; two outlets of the second four-way reversing valve are respectively connected to an outlet of the condenser and an inlet of the liquid storage device through gas pipelines, and the other two outlets are respectively connected with two outlets of the third four-way reversing valve; two outlets of the third four-way reversing valve are respectively connected with an outlet of the liquid storage device and an inlet of the evaporator, and the other two outlets are respectively connected with two outlets of the second four-way reversing valve; one or any of the first, second and third four-way reversing valves are the motor-driven four-way reversing valve described above.
Preferably, in the cooling mode, the first four-way reversing valve conducts the outlet of the compressor and the inlet of the condenser, and conducts the outlet of the evaporator and the inlet of the compressor; the outlet of the condenser is communicated with the inlet of the liquid storage device through a second four-way reversing valve, and the other two outlets are communicated with a third four-way reversing valve; the outlet of the liquid storage device is communicated with the inlet of the evaporator by the third four-way reversing valve, and the other two outlets are communicated with the second four-way reversing valve;
in the heating mode, the first four-way reversing valve conducts the outlet of the compressor with the evaporator and conducts the inlet of the condenser with the inlet of the compressor; the second four-way reversing valve conducts the outlet of the condenser with the third four-way reversing valve and conducts the third four-way reversing valve with the inlet of the liquid storage device; the third four-way reversing valve conducts the outlet of the liquid storage device with the second four-way reversing valve and conducts the evaporator with the second four-way reversing valve;
the refrigerating and heating system also comprises an electromagnetic valve; an expansion valve is arranged between the evaporator and the third four-way reversing valve.
The implementation of the invention comprises the following technical effects:
the motor-driven four-way reversing valve has high action reliability, and the reversing component of the traditional electromagnetic four-way reversing valve realizes reversing by driving the sliding block to linearly slide by the pressure of refrigerant gas; the reversing component of the four-way reversing valve provided by the invention is directly driven by the motor to rotate to realize reversing, so that the action reliability is improved.
The left end cover and the right end cover can be detached from the valve body, and after the end covers are detached, the positioning bearing, the motor and the movable valve core can be detached from the cavity of the valve body. Compared with the existing valve body closed type non-detachable structure, the detachable structure of the four-way reversing valve can be maintained in a mode of replacing parts if one part is damaged, and the cost is saved.
When the movable valve core moves, the movable valve core has self gravity and can possibly generate deflection deformation, the left end is provided with a positioning bearing, and the positioning bearing is matched with a positioning rod extending out of the movable valve core, so that the deflection deformation caused by the self weight of a valve piece can be prevented, and the axis of the valve core is ensured to be horizontal during reversing.
According to the invention, the movable valve core is moved leftwards and rightwards in a mode of driving the screw rod by the motor, and compared with the existing structure of passing through the eccentric wheel, the movable valve core is higher in operation precision, more accurate in reversing and capable of ensuring the operation stability.
The screw sleeve is positioned between the motor and the movable valve core, so that the function of isolating a medium can be achieved, and the motor is prevented from being damaged.
Drawings
Fig. 1 is a schematic structural view of a motor-driven four-way reversing valve according to embodiment 1 of the present invention.
Fig. 2 is a schematic diagram of a movable valve core structure.
Fig. 3 is a schematic view of the conducting state when the movable spool is stroked to the left.
Fig. 4 is a schematic view of the on state when the movable spool is stroked to the right.
Fig. 5 is a system schematic diagram of a carbon dioxide refrigerating and heating system in the refrigerating mode according to embodiment 2 of the present invention.
Fig. 6 is a system schematic diagram of a carbon dioxide refrigerating and heating system in embodiment 2 of the present invention in a heating mode.
In the figure: 1. a valve body; 2. a left end cap; 3. positioning the bearing; 4. a right end cap; 5. a motor; 6. a connecting pin; 7. sleeving the silk; 8. a sealing gasket; 9. a first positioning shaft section; 10. a second positioning shaft section; 11. a screw rod; 12. a first positioning boss; 13. a second positioning boss; 14. a third positioning boss; 15. a fourth positioning boss; 16. a first connection hole; 17. a second connection hole; 18. a third connecting hole; 19. a fourth connection hole; 20. positioning a rod; 21. a fifth positioning boss; 22. a sixth positioning boss; 23. a seventh positioning boss; 24. an eighth positioning boss; 25. a compressor; 26. a condenser; 27. a reservoir; 28. an evaporator; 29. a first four-way reversing valve; 30. a second four-way reversing valve; 31. a third four-way reversing valve; 32. an electromagnetic valve; 33. an expansion 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.
Example 1
Referring to fig. 1 and 2, the embodiment provides a motor-driven four-way reversing valve, which includes a valve body 1, a left end cover 2, a right end cover 4, a positioning bearing 3, a motor 5 and a movable valve core, wherein the left end cover 2 and the right end cover 4 are respectively arranged at two ends of the valve body 1 to play a sealing role, the valve body 1 is a bar-shaped structure with a cavity inside, the motor 5 and the movable valve core are both arranged in the cavity of the valve body 1, the motor 5 is arranged at one end of the valve body 1, the positioning bearing 3 is arranged at the other end of the valve body 1, a lead screw 11 of the movable valve core is connected with a screw sleeve 7, the screw sleeve 7 is connected with a shaft of the motor 5 through a connecting pin 6, the movable valve core extends out of the positioning rod 20; when the motor 5 rotates, the movable valve core can be driven to move left and right through the screw rod 11, the on-off state of different connecting holes is controlled, and reversing is achieved. In this embodiment, remove movable valve core about the mode of passing through motor 5 transmission lead screw 11, compare earlier in current through the eccentric wheel structure, the operation precision is higher, and the switching-over is more accurate, has ensured operating stability. When the movable valve core moves, because the movable valve core has self gravity, deflection deformation is possibly generated, a positioning bearing 3 is arranged at the left end, the positioning bearing 3 is matched with a positioning rod 20 extending out of the movable valve core, deflection deformation generated by the self weight of a valve piece can be prevented, and the axis of the valve core is ensured to be horizontal during reversing. Preferably, when the movable valve core moves left and right, the positioning rod 20 has enough length and is always positioned in the insertion hole of the positioning bearing 3, so that the deformation resistance is better.
The motor-driven four-way reversing valve of the embodiment has high action reliability, and the reversing component of the traditional electromagnetic four-way reversing valve realizes reversing by driving the sliding block to linearly slide by the pressure of refrigerant gas; the reversing component of the four-way reversing valve of the embodiment is directly driven by the motor 5 to rotate to realize reversing, so that the action reliability is improved.
Referring to fig. 1, the left end cover 2 and the right end cover 4 can be detached from the valve body 1, and after the end covers are detached, the positioning bearing 3, the motor 5 and the movable valve core can be detached from the cavity of the valve body 1. Compared with the existing valve body 1 closed type non-detachable structure, the detachable structure of the four-way reversing valve can be maintained in a mode of replacing parts if one part is damaged, and the cost is saved. The screw sleeve 7 is positioned between the motor 5 and the movable valve core, and can play a role in isolating media and avoid damaging the motor 5.
Referring to fig. 1 and 2, a first positioning shaft section 9 and a second positioning shaft section 10 are arranged on the movable valve core, positioning bosses corresponding to each other up and down are arranged in the valve body 1, and the first positioning shaft section 9 and the second positioning shaft section 10 are matched with the positioning bosses to realize the conduction and the closing of different interfaces. And the first positioning shaft section 9 and the second positioning shaft section 10 are sleeved with sealing gaskets 8, so that the sealing effect is better. The movable valve core is integrally formed, the first positioning shaft section 9 and the second positioning shaft section 10 are of circular protruding structures, and the first positioning shaft section 9 and the second positioning shaft section 10 are fixed through rod-shaped structures, so that the movable valve core is convenient to manufacture. The left end cover 2 and the right end cover 4 are provided with rubber sealing rings, so that the sealing effect inside and outside the valve body 1 is ensured.
Specifically, a first connecting hole 16, a second connecting hole 17, a third connecting hole 18 and a fourth connecting hole 19 are formed in the valve body 1, the first connecting hole 16 is arranged at the top of the valve body 1, the second connecting hole 17, the third connecting hole 18 and the fourth connecting hole 19 are arranged on the same side of the valve body 1, preferably on the lower side of the valve body 1, a first positioning boss 12, a second positioning boss 13, a third positioning boss 14 and a fourth positioning boss 15 are arranged inside the valve body 1, a fifth positioning boss 21 is arranged on the opposite surface of the first positioning boss 12, a sixth positioning boss 22 is arranged on the opposite surface of the second positioning boss 13, a seventh positioning boss 23 is arranged on the opposite surface of the third positioning boss 14, and an eighth positioning boss 24 is arranged on the opposite surface of the fourth positioning boss 15; the distance between the first positioning boss and the fifth positioning boss 21, the distance between the second positioning boss 13 and the sixth positioning boss 22, the distance between the third positioning boss 14 and the seventh positioning boss 23, and the distance between the fourth positioning boss 15 and the eighth positioning boss 24 are close to the height of the movable valve core positioning shaft section, and sealing is realized after matching.
Referring to fig. 3, when the movable spool moves to the left end, the first positioning shaft section 9 and the second positioning shaft section 10 are respectively located at the positions of the first positioning boss 12 and the third positioning boss 14, the second connection hole 17 is communicated with the third connection hole 18, and the first connection hole 16 is communicated with the fourth connection hole 19.
Referring to fig. 4, when the movable spool moves to the right, the first positioning shaft section 9 and the second positioning shaft section 10 are respectively located at the second positioning boss 13 and the fourth positioning boss 15, the first connection hole 16 is communicated with the second connection hole 17, and the third connection hole 18 is communicated with the fourth connection hole 19.
Example 2
On the basis of embodiment 1, the present embodiment provides a carbon dioxide refrigeration and heating system including the motor-driven four-way selector valve of embodiment 1.
Another advantage of the four-way reversing valve of example 1 is that it can withstand high pressures in a carbon dioxide refrigeration system using carbon dioxide as the refrigerant, where the pressure is 7.4MPa, or 74 kg. In the traditional ammonia or fluorine refrigerating system, the pressure of the system is only less than 20 kilograms. Therefore, there is a need to provide a high pressure and high flow four-way reversing valve that accommodates carbon dioxide systems. The newly developed four-way reversing valve can meet the requirements.
Referring to fig. 5 and 6, a carbon dioxide refrigerating and heating system includes a compressor 25, a condenser 26, an accumulator 27 and an evaporator 28, which are connected in series by a pipeline; the refrigerating and heating system comprises a first four-way reversing valve 29, a second four-way reversing valve 30 and a third four-way reversing valve 31, wherein four outlets of the first four-way reversing valve 29 are respectively connected to an inlet of the condenser 26, an inlet of the compressor 25, an outlet of the compressor 25 and an outlet of the evaporator 28 through gas pipelines; two outlets of the second four-way reversing valve 30 are respectively connected to an outlet of the condenser 26 and an inlet of the liquid storage device 27 through gas pipelines, and the other two outlets are respectively connected with two outlets of the third four-way reversing valve 31; two outlets of the third four-way selector valve 31 are connected to the outlet of the reservoir 27 and the inlet of the evaporator 28, respectively, and the other two outlets are connected to two outlets of the second four-way selector valve 30, respectively. One or any of the first, second and third four- way reversing valves 29, 30, 31 are the motor-driven four-way reversing valves described above.
FIG. 5 is a schematic view of the carbon dioxide profile in the cooling mode, in which the first four-way reversing valve 29 connects the outlet of the compressor 25 to the inlet of the condenser 26 and the outlet of the evaporator 28 to the inlet of the compressor 25; the second four-way reversing valve 30 conducts the outlet of the condenser 26 with the inlet of the liquid storage device 27, and the other two outlets are conducted with the third four-way reversing valve 31; a third four-way reversing valve 31 communicates the outlet of the reservoir 27 with the inlet of the evaporator 28 and the other two outlets with the second four-way reversing valve 30.
Referring to fig. 6, the schematic diagram of the carbon dioxide trend in the heating mode is shown, in which the first four-way reversing valve 29 connects the outlet of the compressor 25 and the evaporator 28, and connects the inlet of the condenser 26 and the inlet of the compressor 25; the second four-way reversing valve 30 conducts the outlet of the condenser 26 with the third four-way reversing valve 31, and conducts the third four-way reversing valve 31 with the inlet of the liquid reservoir 27; a third four-way reversing valve 31 communicates the outlet of the reservoir 27 with the second four-way reversing valve 30 and communicates the evaporator 28 with the second four-way reversing valve 30.
Specifically, the cooling and heating system further comprises an electromagnetic valve 32, and the electromagnetic valve 32 can keep the condensing pressure within a proper range to ensure the normal operation of the system. An expansion valve 33 is arranged between the evaporator 28 and the third four-way reversing valve 31, and the expansion valve 33 can reduce the pressure of the carbon dioxide refrigerant in the liquid storage device 27, so that the carbon dioxide refrigerant after pressure reduction enters the evaporator 28 for gasification and refrigeration. The flow of carbon dioxide refrigerant into the evaporator 28 can also be controlled by adjusting the expansion valve 33.
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 motor drive four-way reversing valve which characterized in that: the valve comprises a valve body, a left end cover, a right end cover, a positioning bearing, a motor and a movable valve core, wherein the left end cover and the right end cover are respectively arranged at two ends of the valve body; when the motor rotates, the movable valve core can be driven to move through the screw rod, and the connection or the closing of the connection hole is controlled.
2. The motor-driven four-way reversing valve according to claim 1, wherein: the screw sleeve is connected with the motor shaft through a connecting pin and is positioned between the motor and the movable valve core.
3. The motor-driven four-way reversing valve according to claim 1, wherein: the positioning rod has enough length, and the movable valve core is always positioned in the inserting hole of the positioning bearing when moving.
4. The motor-driven four-way reversing valve according to claim 1, wherein: the movable valve core is integrally formed, the first positioning shaft section and the second positioning shaft section are of circular protruding structures, and the first positioning shaft section and the second positioning shaft section are fixedly connected through a rod-shaped structure.
5. The motor-driven four-way reversing valve according to claim 1, wherein: the left end cover and the right end cover can be detached from the valve body, and after the end covers are detached, the positioning bearing, the motor and the movable valve core can be detached from the cavity of the valve body.
6. The motor-driven four-way reversing valve according to claim 1, wherein: the movable valve element is provided with a first positioning shaft section and a second positioning shaft section, the valve body is internally provided with positioning bosses which vertically correspond to each other, and the first positioning shaft section and the second positioning shaft section are matched with the positioning bosses to realize the conduction or the closing of different interfaces.
7. The motor-driven four-way reversing valve of claim 6, wherein: sealing gaskets are sleeved on the first positioning shaft section and the second positioning shaft section; and the left end cover and the right end cover are both provided with sealing rings.
8. The motor-driven four-way reversing valve of claim 6, wherein: the valve body is provided with a first connecting hole, a second connecting hole, a third connecting hole and a fourth connecting hole, the first connecting hole is arranged at the top of the valve body, and the second connecting hole, the third connecting hole and the fourth connecting hole are arranged on the same side of the valve body; a first positioning boss, a second positioning boss, a third positioning boss and a fourth positioning boss are arranged in the valve body, a fifth positioning boss is arranged on the opposite surface of the first positioning boss, a sixth positioning boss is arranged on the opposite surface of the second positioning boss, a seventh positioning boss is arranged on the opposite surface of the third positioning boss, and an eighth positioning boss is arranged on the opposite surface of the fourth positioning boss; the distance between the first positioning boss and the fifth positioning boss, the distance between the second positioning boss and the sixth positioning boss, the distance between the third positioning boss and the seventh positioning boss, and the distance between the fourth positioning boss and the eighth positioning boss are close to or equal to the height of the positioning shaft section of the movable valve core;
when the movable valve core moves to the left end, the first positioning shaft section and the second positioning shaft section are respectively positioned at the positions of the first positioning boss and the third positioning boss, the second connecting hole is communicated with the third connecting hole, and the first connecting hole is communicated with the fourth connecting hole;
when the movable valve core moves to the right end, the first positioning shaft section and the second positioning shaft section are respectively located at the positions of the second positioning boss and the fourth positioning boss, the first connecting hole is communicated with the second connecting hole, and the third connecting hole is communicated with the fourth connecting hole.
9. A carbon dioxide refrigerating and heating system comprises a compressor, a condenser, a liquid storage device and an evaporator which are sequentially communicated through pipelines; the refrigerating and heating recovery system comprises a first four-way reversing valve, a second four-way reversing valve and a third four-way reversing valve, wherein four outlets of the first four-way reversing valve are respectively connected to an inlet of a condenser, an inlet of a compressor, an outlet of the compressor and an outlet of an evaporator through gas pipelines; two outlets of the second four-way reversing valve are respectively connected to an outlet of the condenser and an inlet of the liquid storage device through gas pipelines, and the other two outlets are respectively connected with two outlets of the third four-way reversing valve; two outlets of the third four-way reversing valve are respectively connected with an outlet of the liquid storage device and an inlet of the evaporator, and the other two outlets are respectively connected with two outlets of the second four-way reversing valve; the method is characterized in that: one or more of the first, second and third four-way reversing valves are motor-driven four-way reversing valves according to any one of claims 1-8.
10. A carbon dioxide refrigeration and heating system according to claim 9, wherein: in a refrigeration mode, the first four-way reversing valve conducts the outlet of the compressor and the inlet of the condenser, and conducts the outlet of the evaporator and the inlet of the compressor; the outlet of the condenser is communicated with the inlet of the liquid storage device through a second four-way reversing valve, and the other two outlets are communicated with a third four-way reversing valve; the outlet of the liquid storage device is communicated with the inlet of the evaporator by the third four-way reversing valve, and the other two outlets are communicated with the second four-way reversing valve;
in the heating mode, the first four-way reversing valve conducts the outlet of the compressor with the evaporator and conducts the inlet of the condenser with the inlet of the compressor; the second four-way reversing valve conducts the outlet of the condenser with the third four-way reversing valve and conducts the third four-way reversing valve with the inlet of the liquid storage device; the third four-way reversing valve conducts the outlet of the liquid storage device with the second four-way reversing valve and conducts the evaporator with the second four-way reversing valve;
the refrigerating and heating system also comprises an electromagnetic valve; an expansion valve is arranged between the evaporator and the third four-way reversing valve.
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| CN202010297590.4A CN111426089A (en) | 2020-04-16 | 2020-04-16 | Motor drive four-way reversing valve and carbon dioxide refrigerating and heating system |
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