CN117146457A - Refrigerating system, control method thereof and refrigerating appliance with refrigerating system - Google Patents
Refrigerating system, control method thereof and refrigerating appliance with refrigerating system Download PDFInfo
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- CN117146457A CN117146457A CN202310974847.9A CN202310974847A CN117146457A CN 117146457 A CN117146457 A CN 117146457A CN 202310974847 A CN202310974847 A CN 202310974847A CN 117146457 A CN117146457 A CN 117146457A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005057 refrigeration Methods 0.000 claims abstract description 83
- 230000007246 mechanism Effects 0.000 claims abstract description 73
- 239000003507 refrigerant Substances 0.000 claims description 83
- 230000007704 transition Effects 0.000 claims description 29
- 230000009467 reduction Effects 0.000 claims description 25
- 238000012512 characterization method Methods 0.000 claims description 18
- 230000007613 environmental effect Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 description 6
- 239000012071 phase Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004781 supercooling Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000011555 saturated liquid Substances 0.000 description 1
- 239000013526 supercooled liquid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/005—Compression machines, plants or systems with non-reversible cycle of the single unit type
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/37—Capillary tubes
-
- 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
- F25B41/385—Dispositions with two or more expansion means arranged in parallel on a refrigerant line leading to the same evaporator
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/12—Sound
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/13—Vibrations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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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)
- Air Conditioning Control Device (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses a refrigerating system, a control method thereof and a refrigerating appliance with the refrigerating system. The refrigerating system comprises a compressor, a condenser connected with an outlet end of the compressor, an evaporator connected with an air return pipe of the compressor, and a capillary mechanism communicated between the condenser and the evaporator, and is characterized in that the capillary mechanism comprises a first capillary pipe and a second capillary pipe which are arranged in parallel, and a first common capillary pipe, the first capillary pipe is attached to the air return pipe of the compressor, the second capillary pipe is attached to the evaporator, and the first capillary pipe and the second capillary pipe are communicated to the evaporator through the first common capillary pipe; the refrigeration system further comprises an opening and closing mechanism which is operatively coupled to the capillary mechanism to control the on-off of the first capillary.
Description
Technical Field
The invention relates to a refrigerating system, a control method thereof and a refrigerating appliance with the refrigerating system, and belongs to the technical field of household appliances.
Background
In the refrigeration systems of refrigerators and freezers which are common at present, capillary tubes are generally adopted for throttling and depressurization between a condenser and an evaporator. In principle, the high-pressure medium-temperature liquid-phase refrigerant enters the capillary tube, the resistance of the refrigerant is gradually increased under the friction force of the wall surface of the capillary tube, the pressure and the temperature of the refrigerant are gradually reduced, and finally, the state of the two-phase refrigerant under the evaporating pressure is reached at the expanding position of the outlet of the capillary tube, and then the refrigerant enters the evaporator at a high speed.
However, at the junction of the capillary tube and the evaporator, the refrigerant is highly susceptible to phase change after being ejected from the capillary tube at a high speed due to the influence of abrupt pressure change caused by abrupt increase of the inner diameter of the tube, so that a large number of bubbles are generated, and as the pressure is continuously reduced, the bubbles are increased until being broken, thereby generating a burst noise, and the violent collision of the refrigerant in the burst also drives the refrigeration tube to vibrate, and the vibration is transmitted to the refrigerator box along the tube, so that vibration noise is generated. These noise, as above, can lead to an increase in the overall noise of the refrigerator, with a very poor user experience.
On the other hand, the refrigeration efficiency of the refrigeration system is also one of the important performance indexes, so how to coordinate the refrigeration efficiency of the refrigeration system and the vibration and noise reduction problems is an important subject in the field.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a refrigeration system, a control method thereof and a refrigeration appliance with the refrigeration system.
To achieve the above object, an embodiment of the present invention provides a refrigeration system. The refrigerating system comprises a compressor, a condenser connected with the outlet end of the compressor, an evaporator connected with the air return pipe of the compressor, and a capillary mechanism communicated between the condenser and the evaporator, wherein the capillary mechanism comprises a first capillary pipe and a second capillary pipe which are arranged in parallel, and a first common capillary pipe, the first capillary pipe is attached to the air return pipe of the compressor, the second capillary pipe is attached to the evaporator, and the first capillary pipe and the second capillary pipe are communicated to the evaporator through the first common capillary pipe; the refrigeration system further comprises an opening and closing mechanism which is operatively coupled to the capillary mechanism to control the on-off of the first capillary.
Further preferably, the refrigeration system further comprises an opening and closing mechanism operatively coupled to the capillary mechanism to provide the refrigeration system with a balanced mode and a strong noise reduction mode; in the strong noise reduction mode, the opening and closing mechanism distributes the refrigerant at the condenser to the second capillary tube instead of the first capillary tube; in the balance mode, the opening and closing mechanism causes a portion of the refrigerant at the condenser to be distributed to the first capillary tube and another portion of the refrigerant to be distributed to the second capillary tube.
Further preferably, the opening and closing mechanism includes a confluence valve provided between the first common capillary and the first capillary and between the first common capillary and the second capillary.
Further preferably, the confluence valve is arranged as a two-in one-out electromagnetic valve;
in the strong noise reduction mode, the converging valve breaks the first common capillary and the first capillary, and conducts the first common capillary and the second capillary;
and in the balance mode, the converging valve enables the first common capillary to be communicated to the first capillary and the second capillary simultaneously.
Further preferably, the opening and closing mechanism includes a flow dividing valve coupled to an inlet end of the first capillary tube and an inlet end of the second capillary tube;
in the strong noise reduction mode, the diverter valve distributes refrigerant to the second capillary tube instead of the first capillary tube;
in the balance mode, the diverter valve allows refrigerant to be simultaneously distributed to the first capillary tube and the second capillary tube.
Further preferably, the diverter valve is configured as a one-in two-out solenoid valve;
in the strong noise reduction mode, the diverter valve conducts the inlet end of the second capillary tube and cuts the inlet end of the first capillary tube;
and in the balance mode, the diverter valve simultaneously conducts the inlet end of the first capillary tube and the inlet end of the second capillary tube.
Further preferably, the capillary mechanism includes a second common capillary tube through which the condenser communicates to the first capillary tube and the second capillary tube, respectively.
Further preferably, the inlet end of the evaporator is provided with a transition pipe having an inner diameter larger than that of the first common capillary, and the transition pipe enables the capillary mechanism to communicate with the evaporator.
Further preferably, the evaporator has a cylindrical tube defining an inlet end thereof and a lumen surrounded by the cylindrical tube, the cylindrical tube being provided with a closed end face;
the outlet end of the first common capillary tube and the transition Guan Jun are contained in the lumen and surrounded by refrigerant in the lumen;
at least part of the transition pipe is a porous pipe with a plurality of through holes, the porous pipe and the cylindrical pipe are coaxially arranged, the tail end of the porous pipe is abutted against the closed end surface, and the interior of the porous pipe is communicated with the pipe cavity through the through holes;
the center of the closed end face is provided with a guide protrusion protruding towards the porous pipe, and the closed end face is arranged to extend outwards from the arc of the guide protrusion to the cylindrical pipe.
Further preferably, the refrigeration system further comprises:
the acquisition module is configured to sense a eruption characterization parameter of an expanded diameter position between the capillary mechanism and the evaporator, wherein the eruption characterization parameter is a vibration amplitude or a noise value;
and the control module is connected with the acquisition module and the opening and closing mechanism and controls the opening and closing mechanism according to the characteristic parameter of the eruption.
To achieve the above object, an embodiment of the present invention provides a refrigeration system. The refrigerating system comprises a compressor, a condenser connected with the outlet end of the compressor, an evaporator connected with the muffler of the compressor, and a capillary mechanism communicated between the condenser and the evaporator, wherein the capillary mechanism comprises a first capillary tube and a second capillary tube which are arranged in parallel, and a first common capillary tube, the lowest environmental temperature of the first capillary tube is higher than that of the second capillary tube, and the first capillary tube and the second capillary tube are communicated to the evaporator through the first common capillary tube; the refrigeration system further comprises an opening and closing mechanism which is operatively coupled to the capillary mechanism to control the on-off of the first capillary.
To achieve the above object, an embodiment of the present invention provides a refrigeration appliance including the refrigeration system.
In order to achieve the above object, an embodiment of the present invention provides a control method of the refrigeration system. The control method comprises the following steps:
controlling a portion of the refrigerant of the condenser to flow to the evaporator via the first capillary tube and the first common capillary tube, and another portion of the refrigerant to flow to the evaporator via the second capillary tube and the first common capillary tube;
when the vibration amplitude at the expansion position between the evaporator and the first common capillary tube is larger than the preset vibration amplitude or the noise value is larger than the preset noise value, controlling all refrigerant of the condenser to flow to the evaporator through the second capillary tube and the first common capillary tube.
Further preferably, the control method further includes:
when the vibration amplitude at the spread position between the evaporator and the first common capillary tube is larger than the preset vibration amplitude or the noise value is larger than the preset noise value, the whole refrigerant of the condenser is controlled to flow to the evaporator through the second capillary tube and the first common capillary tube.
Compared with the prior art, the invention has the beneficial effects that: based on the first capillary tube and the second capillary tube which are connected in parallel, and the lowest environmental temperature of the first capillary tube is higher than that of the second capillary tube, the on-off state of the first capillary tube can be adjusted according to the requirement, so that the refrigerating efficiency can be ensured, and the possibility of noise/vibration caused by eruption can be greatly reduced; furthermore, the difficulty in constructing the pipeline of the refrigeration system can be reduced through the arrangement of the first common capillary tube.
Drawings
Fig. 1 is a schematic view of a refrigeration system according to a first embodiment of the present invention;
FIG. 2 is a logic flow diagram of a control method of a refrigeration system according to a first embodiment of the present invention;
fig. 3 is a schematic view of a part of the structure of a refrigeration system according to a second embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the invention and structural, methodological, or functional modifications of these embodiments that may be made by one of ordinary skill in the art are included within the scope of the invention.
A refrigeration system 100 of a first embodiment of the present invention, and a method of controlling a refrigeration system, are illustrated with reference to fig. 1-2.
Referring to fig. 1, a refrigeration system 100 includes a compressor 10, a condenser 20, a capillary mechanism, an evaporator 40, and an opening and closing mechanism.
The compressor 10, the condenser 20, the capillary mechanism and the evaporator 40 are sequentially connected in series, so as to form a closed loop for circulating the refrigerant of the refrigeration system 100 along the compressor 10, the condenser 20, the capillary mechanism and the evaporator 40 back to the compressor 10. Specifically, an outlet end of the compressor 10 is provided as an exhaust pipe 12, and the exhaust pipe 12 is connected to an inlet end 21 of the condenser 20; the inlet end of the compressor 10 is provided with an air return pipe 11, and the air return pipe 11 is connected with the outlet end 42 of the evaporator 40; the capillary mechanism communicates between the outlet end 22 of the condenser 20 and the inlet end of the evaporator 40.
The refrigerant circulation process in the refrigeration system 100 is generally: the high-temperature high-pressure overheated refrigerant gas at the outlet end of the compressor 10 enters the condenser 20 through the exhaust pipe 12, is condensed into high-pressure saturated or supercooled liquid, and enters the capillary mechanism for throttling and depressurization; then injected into the evaporator 40 to be vaporized into a low-temperature low-pressure refrigerant gas; finally, the refrigerant is returned to the compressor 10 through the return air pipe 11, is recompressed into high-temperature high-pressure overheated refrigerant gas by the compressor 10 and is discharged, thereby completing the whole circulation process.
The capillary mechanism includes a first capillary tube 31 and a second capillary tube 32 arranged in parallel.
The first capillary tube 31 is attached to the muffler 11 so that the refrigerant can exchange heat with the muffler 11 while flowing through the first capillary tube 31. Based on this, the attachment of the first capillary tube 31 to the muffler 11 has various implementations, such as: as in the embodiment shown in fig. 1, the first capillary tube 31 is attached to the muffler 11 in a side-by-side manner outside the muffler 11, which may be the same or opposite in refrigerant flow direction, or may be the first capillary tube 31 and the muffler 11 are in abutting contact with or slightly separated from each other; in a variant embodiment, the first capillary tube 31 is attached to the muffler 11 in such a way as to be wound around the outside of the muffler 11, and as such, the first capillary tube 31 and the muffler 11 may be in contact with each other or slightly separated from each other; in yet another variant, the first capillary tube 31 is attached to the muffler 11 in such a way as to penetrate inside the muffler 11, and specifically, the first capillary tube 31 may penetrate into the wall of the muffler 11 or into the internal pipe of the muffler 11. Of course, the person skilled in the art will also make the attachment of the first capillary tube 31 to the muffler 11 based on the concept of "heat exchange with the muffler 11 when the refrigerant flows through the first capillary tube 31" in the present invention.
The second capillary tube 32 is attached to the evaporator 40 so that the refrigerant can exchange heat with the evaporator 40 as it flows through the second capillary tube 32. Similarly, based thereon, the attachment of the second capillary tube 32 to the evaporator 40 has a variety of implementations, such as: as in the embodiment shown in fig. 1, the second capillary tube 32 is attached to the evaporator 40 in such a way as to be wound around the outside of the evaporator 40, and the second capillary tube 32 and the evaporator 40 may be in abutting contact with each other or slightly separated from each other; in a variant embodiment, the second capillary tube 32 is attached to the evaporator 40 in a side-by-side manner, which may be the same or opposite in refrigerant flow direction, outside the evaporator 40, or the second capillary tube 32 is in abutting contact with or slightly separated from the evaporator 40; in yet another variant, the second capillary tube 32 is attached to the evaporator 40 in such a way as to penetrate inside the evaporator 40, and specifically, the second capillary tube 32 may penetrate into the tube wall of the evaporator 40 or into the inner tube of the evaporator 40. Of course, other mating arrangements than the foregoing examples are also contemplated by those skilled in the art based on the teachings of the present invention that "the refrigerant is able to exchange heat with the evaporator 40 as it flows through the second capillary tube 32" as well as the attachment of the second capillary tube 32 to the evaporator 40.
The opening and closing mechanism is operatively coupled to the capillary mechanism, by which actuation the refrigeration system 100 may be provided with a strong noise reduction mode and a balanced mode.
In the balance mode, the opening and closing mechanism turns on the first path P1 and turns on the second path P2. That is, in the balance mode, the opening and closing mechanism allows the refrigerant at the outlet end 22 of the condenser 20 to be simultaneously distributed to the first capillary tube 31 and the second capillary tube 32, or a part of the refrigerant to be distributed to the first capillary tube 31 instead of the second capillary tube 32 while another part of the refrigerant to be distributed to the second capillary tube 32 instead of the first capillary tube 31, so that a part of the refrigerant can exchange heat with the muffler 11 while flowing through the first capillary tube 31 and another part of the refrigerant can exchange heat with the evaporator 40 while flowing through the second capillary tube 32.
In the strong noise reduction mode, the opening and closing mechanism cuts off the first path P1 from the condenser 20 to the evaporator 40 via the first capillary tube 31, and turns on the second path P2 from the condenser 20 to the evaporator 40 via the second capillary tube 32. That is, in the strong noise reduction mode, the opening and closing mechanism distributes the refrigerant at the condenser 20 to the second capillary tube 32 instead of the first capillary tube 31. Thereby, the entire refrigerant flows through the second capillary tube 32 and exchanges heat with the evaporator 40.
Typically, the enthalpy of the refrigerant in the evaporator 40 is lower than the enthalpy of the refrigerant in the return line 11, or the temperature of the evaporator 40 is lower than the temperature of the return line 11. The temperature of the portion of the return air pipe 11 adjacent to the first capillary tube 31 defines the minimum ambient temperature at which the first capillary tube 31 is located, and the temperature of the portion of the evaporator 40 adjacent to the second capillary tube 32 defines the minimum ambient temperature at which the second capillary tube 32 is located, whereby the minimum ambient temperature at which the first capillary tube 31 is located is higher than the minimum ambient temperature at which the second capillary tube 32 is located.
Compared with the heat exchange between the refrigerant and the muffler 11 when flowing through the first capillary tube 31, the heat exchange between the refrigerant and the evaporator 40 when flowing through the second capillary tube 32 can increase the supercooling degree, reduce the gas phase proportion between the evaporator 40 and the capillary mechanism at the expanding position, and the refrigerant flows into the evaporator 40 with smaller dryness, so that the noise and vibration of eruption at the expanding position are reduced; in contrast, compared to the heat exchange between the refrigerant flowing through the second capillary tube 32 and the evaporator 40, the heat exchange between the refrigerant flowing through the first capillary tube 31 and the air return tube 11 can reduce the loss of the refrigerant in the capillary mechanism to the cold of the evaporator 40, and improve the refrigeration efficiency of the refrigeration system 100.
Therefore, the refrigerating system 100 of the embodiment can realize low-noise low-vibration operation and ensure higher refrigerating efficiency at the same time when in the balance mode, and can further reduce vibration and noise when in the strong noise reduction mode, so that the refrigerating system 100 can meet the switching between high-refrigerating efficiency operation and low-noise operation so as to adapt to the use requirements under different conditions.
Further, referring to fig. 1, the capillary mechanism further includes a second common capillary 34, and the condenser 20 is respectively connected to the first capillary 31 and the second capillary 32 through the second common capillary 34.
The opening and closing mechanism includes a diverter valve 72. The diverter valve 72 is configured as a two-in, two-out valve having an inlet coupled to the outlet end of the second common capillary 34, one outlet coupled to the inlet end of the first capillary 31 and the other outlet coupled to the inlet end of the second capillary 32.
In the strong noise reduction mode, the flow dividing valve 72 cuts off the second common capillary 34 to the first capillary 31 and connects the second common capillary 34 to the second capillary 32, and the refrigerant of the second common capillary 34 is distributed to the second capillary 32 instead of the first capillary 31; in the balance mode, the flow divider 72 allows the second common capillary 34 to be in communication with both the first capillary 31 and the second capillary 32, and the refrigerant of the second common capillary 34 is simultaneously distributed to the first capillary 31 and the second capillary 32.
Further, the capillary mechanism includes a first common capillary tube 33, an outlet end of the first common capillary tube 33 is connected to the evaporator 40, and the evaporator 40 is connected to the first capillary tube 31 and the second capillary tube 32 through the first common capillary tube 33, respectively.
The opening and closing mechanism includes a confluence valve 71. The converging valve 71 is a two-in-one-out valve, one inlet of which is coupled to the outlet end of the first capillary tube 31 and the other inlet of which is coupled to the outlet end of the second capillary tube 32, and the outlet of which is coupled to the inlet end of the first common capillary tube 33.
In the strong noise reduction mode, the confluence valve 71 disconnects the first capillary tube 31 from the first common capillary tube 33 and connects the second capillary tube 32 to the first common capillary tube 33; in the balance mode, the confluence valve 71 connects the first capillary 31 and the first common capillary 33, and connects the second capillary 32 and the first common capillary 33.
Preferably, the merging valve 71 and the diverging valve 72 may each be provided as a solenoid valve, and both may be connected to the control module 52 described later to cooperatively and synchronously act under the control of the control module 52 to achieve the strong noise reduction mode and the change of the balance mode. Of course, in the modified embodiment, the strong noise reduction mode and the balance mode may be realized as well, with either one of the split valve 72 and the merge valve 71 being left, for example, the split valve 72 being eliminated and only the merge valve 71 being left, or with the split valve 72 being left, for example, and the merge valve 71 being eliminated.
It is further preferred that in the preferred embodiment shown in fig. 1, the inlet end of the evaporator 40 is provided with a transition tube 60, the capillary means is connected to the evaporator 40 by means of the transition tube 60, and the inner diameter of the transition tube 60 is larger than the inner diameter of the capillary means and smaller than the inner diameter of the evaporator 40. Specifically, the first common capillary tube 33 is connected to the inlet end of the transition tube 60, and specifically may be connected by any manner such as welding, sleeving, or integrally arranging. The transition tube 60 has an inner diameter greater than that of the first common capillary tube 33, and thus the transition tube 60 defines an expanded diameter position through which refrigerant is blown out by a pressure drop and changes phase, and thus the expanded diameter position can be regarded as a blown out position between the capillary mechanism and the evaporator 40, and often also as a noise generation position. The transition pipe 60 is arranged in the embodiment, so that the pipe diameter can be gradually increased, and the eruption noise and vibration can be reduced to a certain extent.
The first capillary tube 31 and the second capillary tube 32 are each in turn connected to the evaporator 40 via a first common capillary tube 33, a transition tube 60. By sharing the first common capillary tube 33, the structural layout of the transition tube 60 is facilitated.
Further, the refrigeration system 100 also includes an acquisition module 51 and a control module 52.
The acquisition module 51 is configured to sense a firing characterization parameter of the expanded diameter position between the capillary mechanism and the evaporator 40. The burst characterization parameter may specifically be a vibration amplitude, and the corresponding acquisition module 51 is implemented by using any feasible components such as a distance sensor, an acceleration sensor, and the like; alternatively, the burst characterization parameter may be a noise value, and the acquisition module 51 may be implemented with a microphone or any other feasible means.
The junction of the capillary mechanism and the transition tube 60 defines the diameter expansion position, and in this embodiment, as described above, the junction of the capillary mechanism and the transition tube 60 is at the transition tube 60, and the transition tube 60 defines the diameter expansion position, and the burst characterization parameter can be sensed by mounting the acquisition module 51 to the transition tube 60. Of course, without being limited thereto, for example, in a variant embodiment, the capillary mechanism (specifically, the first common capillary tube 33) is directly assembled at the inlet end of the evaporator 40, the pipe diameter of the refrigeration circuit is changed from the pipe diameter of the capillary mechanism (specifically, the first common capillary tube 33) to the pipe diameter of the evaporator 40, the expansion position is defined at the inlet end of the evaporator 40, and the acquisition module 51 may be configured at the inlet end of the evaporator 40 to sense the burst characterization parameter.
The control module 52 is connected to the acquisition module 51 and the opening and closing mechanism, and is configured to control the opening and closing mechanism to operate according to the firing characterization parameter, so that the refrigeration system 100 is switched between the strong noise reduction mode and the balance mode. Therefore, according to the characteristic parameter of the refrigerant injection at the expanding position, the refrigerant injection condition at the expanding position can be reflected, and the control module 52 controls the opening and closing mechanism to actuate, so as to further realize the control of the refrigeration system 100, thereby achieving the effect of regulating and controlling the refrigeration efficiency and noise/vibration.
Preferably, in the embodiment, when the refrigeration system 100 is operated, the control module 52 controls the refrigeration system 100 to be in the balance mode when controlling the compressor 10 to be started, that is, to be in a state of high refrigeration efficiency and low dryness to reduce the eruption noise when the refrigeration system 100 is started each time, and then determines whether to adjust the mode according to the noise/vibration condition, so that the temperature can be quickly lowered first, energy is saved, consumption is reduced, and the problem of low refrigeration efficiency caused by blindly excessively lowering dryness to reduce noise under the unnecessary condition is avoided.
Further, when the refrigeration system 100 is in the balance mode, the control module 52 determines whether the burst characterization parameter meets a preset condition.
In an embodiment, the preset condition may specifically be that the preset vibration amplitude is greater than the preset vibration amplitude, and accordingly, "if the burst characteristic parameter meets the preset condition", that is, the vibration amplitude sensed by the acquisition module 51 is greater than the preset vibration amplitude; or, the preset condition may specifically be greater than a preset noise value, and accordingly, "if the burst characteristic parameter meets the preset condition", that is, the noise value sensed by the acquisition module 51 is greater than the preset noise value.
Further, in the foregoing determining step, if the burst characteristic parameter meets the preset condition, and at this time, the control module 52 controls the refrigeration system 100 to switch to the strong noise reduction mode in response to the situation that the vibration at the diameter expansion position is intense or the noise is high, so that the dryness is greatly reduced by flowing all the refrigerant through the second capillary tube 32, and vibration and noise caused by the burst at the diameter expansion position are reduced; otherwise, if the burst characteristic parameter does not meet the preset condition, and the vibration corresponding to the diameter expansion position is not intense or the noise is low, the control module 52 controls to keep the balance mode continuously, so that the refrigeration system 100 operates with higher refrigeration efficiency.
Further, when the refrigeration system 100 is in the balance mode for a preset period of time, the preset period of time may preferably be any value within a range of 2min-3min, the acquisition module 51 senses the current burst characteristic parameter of the diameter expansion position, and the control module 52 further determines whether the burst characteristic parameter meets the preset condition and controls whether the opening and closing mechanism is actuated according to the determination result. That is, the refrigerating system 100 is operated in the balance mode for the preset period of time, so that after the operation of the whole refrigerating system 100 is stable, the burst characterization parameter is sensed and whether the vibration/noise is too large is judged, so that the error caused by unstable operation of the refrigerating system 100 just started can be reduced, and the sensing and control are more accurate.
In this embodiment, the acquisition module 52 may specifically include one or more sensing elements, preferably, the number of the sensing elements is set to be more than two, and an average value of the sensing results of the more than two sensing elements is used as the burst characterization parameter, so that accuracy may be improved.
Referring to fig. 2, the present embodiment also provides a control method of a refrigeration system, which is suitable for the control of the refrigeration system 100, and the control method of the present embodiment is described below with reference to the structure of the refrigeration system 100, and of course, the specific structure of the refrigeration system to which the control method is suitable is not limited to the refrigeration system 100. The control method comprises the following steps:
the first path P1 and the second path P2 are controlled to be both conducted, and the refrigerant of the condenser 20 is simultaneously distributed to the first capillary tube 31 and the second capillary tube 32, so that part of the refrigerant exchanges heat with the muffler 11 of the compressor 10 when flowing through the first capillary tube 31 and the other part of the refrigerant exchanges heat with the evaporator 40 when flowing through the second capillary tube 32;
sensing a spray characterization parameter of the diameter expansion position, wherein the spray characterization parameter is a vibration amplitude or a noise value;
judging whether the eruption characterization parameter accords with a preset condition, wherein the preset condition is larger than a preset vibration amplitude or larger than a preset noise value;
if the vibration amplitude is larger than the preset vibration amplitude or the noise value is larger than the preset noise value, the second path P2 is controlled to be conducted, the first path P1 is controlled to be cut off, all the refrigerant of the condenser 20 is distributed to the second capillary tube 32 instead of the first capillary tube 31, and accordingly all the refrigerant flows through the second capillary tube 32 to exchange heat with the evaporator 40 to reduce the dryness of the refrigerant at the expanding position, and vibration and noise are further reduced;
if not, that is, the vibration amplitude is not greater than the preset vibration amplitude or the noise value is not greater than the preset noise value, the first path P1 and the second path P2 are kept on.
Thus, in combination with the foregoing, a portion of the refrigerant is allowed to flow through the first capillary tube 31 to ensure the refrigerating efficiency, and a portion of the refrigerant is controlled to flow through the second capillary tube 32 to the evaporator 40, so that the refrigerating system 100 maintains low noise/vibration and high refrigerating efficiency; and when vibration or noise is large at the expanded position, the whole refrigerant is made to flow through the second capillary tube 32 to exchange heat with the evaporator 40 to pull down dryness to ensure low vibration/noise; through the above two state changes, the refrigeration system 100 can meet the balance and reasonable regulation of the refrigeration efficiency and noise, so as to adapt to the use requirements under different situations.
Preferably, the step of sensing the burst characterization parameter of the expanded diameter position is:
and controlling the first path P1 and the second path P2 to be conducted, and sensing the current eruption characterization parameter of the expanding position when the preset duration is kept, wherein the preset duration can be any value within the range of 2min-3min preferably. Further, a subsequent step of "judging whether the burst characteristic parameter meets a preset condition" is performed, and the on-off states of the first path P1 and the second path P2 are controlled according to the judgment result. Errors caused by unstable operation of the refrigeration system 100 just at start-up can be reduced, and sensing and control are more accurate.
In this embodiment, the control method further includes: when the compressor 10 is controlled to start, the first path P1 and the second path P2 are controlled to be both conductive, and then the mode is changed into the strong noise reduction mode. Therefore, the refrigeration system 100 is ensured to be started with high refrigeration efficiency, and meanwhile, lower noise can be properly maintained, and then the mode is adjusted when the noise/vibration condition exceeds the standard, so that the temperature can be quickly lowered, the energy is saved, the consumption is reduced, and the problem of low refrigeration efficiency caused by blind noise reduction under the unnecessary condition is avoided.
Referring to fig. 3, a part of the refrigeration system according to the second embodiment of the present invention is shown, and the difference between the first common capillary tube 33 and the evaporator 40 is only the connection structure, and the following description will be given.
In the present embodiment, the evaporator has a cylindrical tube 410 defining an inlet end 41 thereof and a lumen 411 surrounded by the cylindrical tube 410; the outlet end of the first common capillary tube 33 and the transition tube 60 are both housed in the lumen 411 and are surrounded by the refrigerant in the lumen 411. Thus, on one hand, the expanded diameter position between the capillary mechanism and the evaporator is covered by wrapping, the refrigerant eruption noise in the transition pipe 60 behind the first common capillary tube 33 is wrapped by the refrigerant in the pipe cavity 411 to reduce leakage, on the other hand, vibration caused by eruption can be counteracted by the refrigerant to reduce vibration noise caused by outward transmission of vibration, on the other hand, the first common capillary tube 33 is wrapped in the pipe cavity 411 to enable the refrigerant to exchange heat with the refrigerant in the evaporator 40 when flowing through the first common capillary tube 33, thereby increasing the supercooling degree in the first common capillary tube 33, reducing the dryness of the refrigerant at the expanded diameter position and further eliminating eruption noise/vibration problems.
Preferably, at least part of the transition tube 60 is provided as a perforated tube 61 with a number of through holes 610, the interior of the perforated tube 61 being in communication with the lumen 411 via the through holes 610. In this way, when the refrigerant is sprayed in the transition pipe 60, the large bubbles generated by the pressure decrease are split into small bubbles while passing through the through hole 610, thereby reducing noise of bubble collapse.
In the present embodiment, the portion of the outlet end of the transition pipe 60 is provided as a porous pipe 61.
The cylindrical tube 410 is provided with a closed end face 412, and the porous tube 61 is coaxially arranged with the cylindrical tube 410 and the tip end thereof (i.e., the end remote from the first common capillary tube 33) abuts the closed end face 412; the refrigerant in the lumen 411 flows from the transition tube 60 to the first common capillary tube 33 as indicated by the arrow in fig. 3. That is, the flow of refrigerant in the first common capillary tube 33 and the transition tube 60 is exactly opposite to the flow of refrigerant in the lumen 411.
In addition, a flow guiding protrusion 4120 protruding toward the porous tube 61 is provided at the center of the closed end face 412, and the closed end face 412 is provided to extend outwardly from the flow guiding protrusion 4120 in an arc shape to the cylindrical tube 410. Thus, the refrigerant can smoothly flow from the inside of the porous tube 61 into the lumen 411, avoiding turbulence, vibration, or noise caused by severe collision.
The third embodiment of the present invention also provides a refrigeration appliance, which may be specifically configured as a refrigerator, freezer or other appliance having a low-temperature storage function. The refrigeration appliance further comprises a refrigeration system as described in any of the previous first or second embodiments.
In summary, the beneficial effects of the invention are as follows: the refrigeration system 100 has a balance mode and a strong noise reduction mode, so that the refrigeration system selectively maintains high refrigeration efficiency and lower noise/vibration according to actual conditions, or the cooling capacity of the evaporator 40 is utilized to increase the supercooling degree of all refrigerants in the capillary mechanism, thereby greatly reducing the possibility of noise/vibration generated by eruption, realizing balance and control on the refrigeration efficiency and vibration reduction, and enabling the refrigeration system 100 to meet the use requirements under different conditions.
It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.
The above detailed description is merely illustrative of possible embodiments of the present invention, which should not be construed as limiting the scope of the invention, and all equivalent embodiments or modifications that do not depart from the spirit of the invention are intended to be included in the scope of the invention.
Claims (14)
1. A refrigeration system comprising a compressor, a condenser connected to an outlet end of the compressor, an evaporator connected to an air return pipe of the compressor, and a capillary mechanism communicating between the condenser and the evaporator, wherein the capillary mechanism comprises a first capillary tube and a second capillary tube arranged in parallel, and a first common capillary tube, the first capillary tube is attached to the air return pipe of the compressor, the second capillary tube is attached to the evaporator, and the first capillary tube and the second capillary tube are both communicated to the evaporator via the first common capillary tube;
the refrigeration system further comprises an opening and closing mechanism which is operatively coupled to the capillary mechanism to control the on-off of the first capillary.
2. The refrigeration system of claim 1 wherein said opening and closing mechanism is operatively coupled to said capillary mechanism to provide said refrigeration system with a balanced mode and a strong noise reduction mode; in the strong noise reduction mode, the opening and closing mechanism distributes the refrigerant at the condenser to the second capillary tube instead of the first capillary tube; in the balance mode, the opening and closing mechanism causes a portion of the refrigerant at the condenser to be distributed to the first capillary tube and another portion of the refrigerant to be distributed to the second capillary tube.
3. The refrigeration system according to claim 2, wherein the opening and closing mechanism includes a confluence valve provided between the first common capillary tube and the first capillary tube and between the first common capillary tube and the second capillary tube.
4. A refrigeration system according to claim 3 wherein said merge valve is provided as a two-in one-out solenoid valve;
in the strong noise reduction mode, the converging valve breaks the first common capillary and the first capillary, and conducts the first common capillary and the second capillary;
and in the balance mode, the converging valve enables the first common capillary to be communicated to the first capillary and the second capillary simultaneously.
5. The refrigeration system of claim 2, wherein the opening and closing mechanism comprises a diverter valve coupled at an inlet end of the first capillary tube and an inlet end of the second capillary tube;
in the strong noise reduction mode, the diverter valve distributes refrigerant to the second capillary tube instead of the first capillary tube;
in the balance mode, the diverter valve allows refrigerant to be simultaneously distributed to the first capillary tube and the second capillary tube.
6. The refrigerant system as set forth in claim 5, wherein said flow divider valve is provided as a one-in two-out solenoid valve;
in the strong noise reduction mode, the diverter valve conducts the inlet end of the second capillary tube and cuts the inlet end of the first capillary tube;
and in the balance mode, the diverter valve simultaneously conducts the inlet end of the first capillary tube and the inlet end of the second capillary tube.
7. The refrigeration system of claim 1, wherein the capillary mechanism comprises a second common capillary tube through which the condenser communicates to the first capillary tube and the second capillary tube, respectively.
8. The refrigeration system of claim 1 wherein an inlet end of said evaporator is provided with a transition tube having an inner diameter greater than said first common capillary tube, said transition tube communicating said capillary mechanism with said evaporator.
9. The refrigeration system as recited in claim 8 wherein said evaporator has a cylindrical tube defining an inlet end thereof and a lumen enclosed by said cylindrical tube, said cylindrical tube being provided with a closed end surface;
the outlet end of the first common capillary tube and the transition Guan Jun are contained in the lumen and surrounded by refrigerant in the lumen;
at least part of the transition pipe is a porous pipe with a plurality of through holes, the porous pipe and the cylindrical pipe are coaxially arranged, the tail end of the porous pipe is abutted against the closed end surface, and the interior of the porous pipe is communicated with the pipe cavity through the through holes;
the center of the closed end face is provided with a guide protrusion protruding towards the porous pipe, and the closed end face is arranged to extend outwards from the arc of the guide protrusion to the cylindrical pipe.
10. The refrigeration system of claim 1, further comprising:
the acquisition module is configured to sense a eruption characterization parameter of an expanded diameter position between the capillary mechanism and the evaporator, wherein the eruption characterization parameter is a vibration amplitude or a noise value;
and the control module is connected with the acquisition module and the opening and closing mechanism and controls the opening and closing mechanism according to the characteristic parameter of the eruption.
11. The refrigerating system comprises a compressor, a condenser connected with an outlet end of the compressor, an evaporator connected with an air return pipe of the compressor and a capillary mechanism communicated between the condenser and the evaporator, and is characterized in that the capillary mechanism comprises a first capillary tube and a second capillary tube which are arranged in parallel, and a first common capillary tube, wherein the lowest environmental temperature of the first capillary tube is higher than that of the second capillary tube, and the first capillary tube and the second capillary tube are communicated to the evaporator through the first common capillary tube; the refrigeration system further comprises an opening and closing mechanism which is operatively coupled to the capillary mechanism to control the on-off of the first capillary.
12. A refrigeration appliance comprising a refrigeration system according to any one of claims 1 to 11.
13. A control method of a refrigeration system according to any one of claims 1 to 11, comprising:
controlling a portion of the refrigerant of the condenser to flow to the evaporator via the first capillary tube and the first common capillary tube, and another portion of the refrigerant to flow to the evaporator via the second capillary tube and the first common capillary tube;
when the vibration amplitude at the expansion position between the evaporator and the first common capillary tube is larger than the preset vibration amplitude or the noise value is larger than the preset noise value, controlling all refrigerant of the condenser to flow to the evaporator through the second capillary tube and the first common capillary tube.
14. The method of controlling a refrigeration system according to claim 13, further comprising:
when the vibration amplitude at the spread position between the evaporator and the first common capillary tube is larger than the preset vibration amplitude or the noise value is larger than the preset noise value, the whole refrigerant of the condenser is controlled to flow to the evaporator through the second capillary tube and the first common capillary tube.
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| CN202310974847.9A CN117146457A (en) | 2020-08-05 | 2020-08-05 | Refrigerating system, control method thereof and refrigerating appliance with refrigerating system |
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| JP3432701B2 (en) * | 1997-06-11 | 2003-08-04 | 株式会社東芝 | Cooling system |
| KR20030041688A (en) * | 2001-11-21 | 2003-05-27 | 주식회사 엘지이아이 | Device for connecting capillary tube to evaporator for refrigerator |
| WO2011039658A2 (en) * | 2009-09-29 | 2011-04-07 | Koninklijke Philips Electronics N.V. | Heat exchange system and method of producing the same |
| US9285161B2 (en) * | 2012-02-21 | 2016-03-15 | Whirlpool Corporation | Refrigerator with variable capacity compressor and cycle priming action through capacity control and associated methods |
| CN106196709A (en) * | 2015-12-03 | 2016-12-07 | 青岛海尔特种电冰柜有限公司 | The supercool cooling cycle system of quasiconductor and refrigeration plant |
| CN110068178A (en) * | 2018-01-24 | 2019-07-30 | 富泰华工业（深圳）有限公司 | Noise reduction device and refrigeration equipment with the noise reduction device |
| CN110715490A (en) * | 2019-09-30 | 2020-01-21 | 西安交通大学 | Low-noise low-energy-consumption refrigerating system and working method thereof |
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