CN106196778A - A kind of coolant circulating system and control method thereof - Google Patents
A kind of coolant circulating system and control method thereof Download PDFInfo
- Publication number
- CN106196778A CN106196778A CN201610765266.4A CN201610765266A CN106196778A CN 106196778 A CN106196778 A CN 106196778A CN 201610765266 A CN201610765266 A CN 201610765266A CN 106196778 A CN106196778 A CN 106196778A
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- China
- Prior art keywords
- coolant
- matchmaker
- valve
- refrigerant circulation
- circulation circuit
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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
- F25B45/00—Arrangements for charging or discharging refrigerant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- 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
Abstract
The open a kind of coolant circulating system of the present invention and control method thereof, relate to technical field of refrigeration equipment.Can not realize being automatically adjusted for solving the coolant quantity in prior art refrigerant circulation circuit, make the refrigeration of coolant circulating system or heating operations can not be in the problem of optimum state and invent.The coolant circulating system of the present invention includes being sequentially connected with and constitute the compressor of refrigerant circulation circuit, condenser, choke valve, vaporizer and fluid reservoir, also include coolant storage device, it is connected between coolant storage device and refrigerant circulation circuit to have and fills matchmaker's pipe and return matchmaker's pipe, fill to be serially connected with on matchmaker's pipe and fill matchmaker's valve, return and be serially connected with back matchmaker's valve on matchmaker's pipe, also include detecting system and control unit, detecting system is for detecting the coolant parameter in refrigerant circulation circuit, control unit, for the testing result according to detecting system, controls to open and fills matchmaker's valve or return matchmaker's valve.Coolant circulating system of the present invention can be used for the coolant quantity being automatically adjusted in refrigerant circulation circuit.
Description
Technical field
The present invention relates to technical field of refrigeration equipment, particularly relate to a kind of coolant circulating system and control method thereof.
Background technology
In the equipment such as air-conditioner, refrigerator, refrigerator and large-scale refrigeration unit, coolant circulating system is to form cold or heat
The key structure of amount, including being sequentially connected with and formed the compressor of refrigerant circulation circuit, condenser, choke valve, vaporizer and storage
Flow container etc..This refrigerant circulation circuit is according to ambient temperature, the difference of cooling and warming state, and the coolant quantity used is the most not
With, such as, in process of refrigerastion, the coolant quantity that the refrigerant circulation circuit of air-conditioner is used when ambient temperature is by 42 DEG C
More than the coolant quantity used when external environment is by 25 DEG C, the most such as, air-conditioner coolant closed circuit is used when heating
Coolant quantity more than the coolant quantity that used when refrigeration, and the coolant quantity injected in existing refrigerant circulation circuit is fixed,
Cannot be carried out being automatically adjusted, so that the refrigeration of refrigerant circulation circuit or heating operations can not be in optimum state.
In order to avoid the problems referred to above, a solution being widely used at present is: use electric expansion valve as throttling
Coolant in refrigerant circulation circuit is adjusted by valve, and the detailed process of regulation is: when the temperature of coolant in refrigerant circulation circuit
Too high or time pressure is excessive, come blood pressure lowering, cooling by the aperture tuning up electric expansion valve；When the temperature of coolant in refrigerant circulation circuit
Spend low or time pressure is too small, carry out supercharging by the aperture turning electric expansion valve down, heat, make system be similarly in one optimal
State.
But, owing to the aperture regulating power of electric expansion valve is limited, range of accommodation is less, therefore in refrigerant circulation circuit
When used coolant quantity differs greatly, it is impossible to meet regulatory demand, the most still can not make coolant circulating system refrigeration or
Heating operations is in an optimum state.
Summary of the invention
The present invention provides a kind of coolant circulating system and control method thereof, it is possible to be automatically adjusted in refrigerant circulation circuit is cold
Matchmaker measures, and makes the refrigeration of coolant circulating system or heating operations be in optimum state.
For reaching above-mentioned purpose, the invention provides a kind of coolant circulating system, follow including being sequentially connected with and constituting coolant
The compressor of loop back path, condenser, choke valve, vaporizer and fluid reservoir, also include coolant storage device, and described coolant stores dress
Put to be connected to have between described refrigerant circulation circuit and fill matchmaker's pipe and return matchmaker's pipe, described in fill to be serially connected with on matchmaker's pipe and fill matchmaker's valve, described
Return and be serially connected with back matchmaker's valve on matchmaker's pipe, also include that detecting system and control unit, described detecting system are used for detecting described coolant
Coolant parameter in closed circuit, described control unit is for the testing result according to described detecting system, it is judged that described coolant
Whether the coolant quantity in closed circuit is short of or excess, when the coolant quantity in described refrigerant circulation circuit is short of, controls to open
The described matchmaker's valve that fills, the coolant in described coolant storage device is filled with in described refrigerant circulation circuit by the described matchmaker's of filling pipe, works as institute
When stating the coolant excess in refrigerant circulation circuit, control to open and described return matchmaker's valve, the coolant in described refrigerant circulation circuit by
Described time matchmaker's pipe is recycled in described coolant storage device.
The embodiment of the present invention additionally provides the control method of a kind of coolant circulating system, and this control method is real based on the present invention
Execute a kind of coolant circulating system that example provides, comprise the following steps:
Coolant parameter in detecting system detection refrigerant circulation circuit；
The coolant parameter that control unit detects according to described detecting system, it is judged that the coolant in described refrigerant circulation circuit is
No shortcoming or excess；
When in described refrigerant circulation circuit coolant be short of time, control unit control open described in fill matchmaker's valve, when described
During coolant excess in refrigerant circulation circuit, control unit then controls to open described returns matchmaker's valve.
A kind of coolant circulating system of present invention offer and control method thereof, detecting system detection obtains refrigerant circulation circuit
In coolant parameter after, the coolant that the coolant parameter that control unit detects according to detecting system judges in coolant circulating system is
No shortcoming or excess, when the coolant in refrigerant circulation circuit is short of, control unit then control to open described in fill matchmaker's valve, so that cold
Coolant in matchmaker's storage device is filled with in refrigerant circulation circuit by filling matchmaker's pipe, when coolant excess in refrigerant circulation circuit, and control
Unit processed then controls to open back matchmaker's valve, so that the coolant in refrigerant circulation circuit is recycled to coolant storage device by returning matchmaker's pipe
In, thus achieve being automatically adjusted of coolant quantity in refrigerant circulation circuit.Compared with prior art, the coolant of the embodiment of the present invention
Range of accommodation is unrestricted, therefore, it is possible to ensure that the refrigeration of coolant circulating system or heating operations are in optimum state all the time.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the structural representation of embodiment of the present invention coolant circulating system；
Fig. 2 (a) is the embodiment of the present invention coolant circulating system structural representation when refrigerating state；
Fig. 2 (b) is the embodiment of the present invention coolant circulating system structural representation when heating state；
Fig. 3 is the schematic flow sheet of the control method of embodiment of the present invention coolant circulating system.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
In describing the invention, it is to be understood that term " " center ", " on ", D score, "front", "rear", " left ",
Orientation or the position relationship of the instruction such as " right ", " vertically ", " level ", " top ", " end ", " interior ", " outward " are based on shown in the drawings
Orientation or position relationship, be for only for ease of describe the present invention and simplify describe rather than instruction or hint indication device or
Element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.?
In description of the invention, except as otherwise noted, " multiple " are meant that two or more.
Coolant circulating system includes that the refrigerant circulation being made up of compressor, condenser, choke valve, vaporizer and fluid reservoir returns
Road, wherein, compressor includes muffler and exhaustor, for the gaseous coolant of low-temp low-pressure is compressed into the gaseous state of High Temperature High Pressure
Coolant, and by exhaustor, the gaseous coolant of this High Temperature High Pressure is expelled to condenser, condenser is for by the gas of High Temperature High Pressure
State coolant is condensed into the liquid refrigerants of cryogenic high pressure, and is sent to choke valve, and the liquid refrigerants of High Temperature High Pressure can be entered by choke valve
Row blood pressure lowering is to generate the liquid refrigerants of low-temp low-pressure, and being sent to vaporizer, to be evaporated generating the gaseous state of low-temp low-pressure cold
Matchmaker, the gaseous coolant of this low-temp low-pressure is back to compression after carrying out gas-liquid separation in the fluid reservoir in compressor return air pipe
Machine, to carry out next circulation.
With reference to the specific embodiment that Fig. 1, Fig. 1 are embodiment of the present invention coolant circulating system, the coolant of the present embodiment
Blood circulation includes being sequentially connected with and constitute the compressor 11 of refrigerant circulation circuit 1, condenser 12, choke valve 13, vaporizer 14
With fluid reservoir 15, also including coolant storage device 2, being connected between described coolant storage device 2 with described refrigerant circulation circuit 1 has
Fill matchmaker's pipe 3 and return matchmaker's pipe 4, described in fill to be serially connected with on matchmaker's pipe 3 and fill matchmaker's valve 31, described time matchmaker's pipe 4 is serially connected with back matchmaker's valve 41,
Also include that detecting system 5 and control unit (not shown), described detecting system 5 are used for detecting described refrigerant circulation circuit 1
In coolant parameter, described control unit is for according to the testing result of described detecting system 5, it is judged that described refrigerant circulation circuit
Coolant quantity in 1 whether be short of or excess, when in described refrigerant circulation circuit 1 coolant quantity be short of time, control open described in fill
Matchmaker's valve 31, the coolant in described coolant storage device 2 is filled with in described refrigerant circulation circuit 1 by the described matchmaker's of filling pipe 3, when described
During coolant excess in refrigerant circulation circuit 1, control to open and described return matchmaker's valve 41, the coolant in described refrigerant circulation circuit 1
It is recycled in described coolant storage device 2 by described time matchmaker's pipe 4.
A kind of coolant circulating system that the present invention provides, detecting system 5 detection obtains the coolant ginseng in refrigerant circulation circuit 1
After amount, control unit according to the coolant parameter that detecting system 5 detects judge the coolant in coolant circulating system whether be short of or
Excess, when the coolant in refrigerant circulation circuit 1 is short of, control unit then control to open described in fill matchmaker's valve 31, so that coolant storage
Coolant in cryopreservation device 2 is filled with in refrigerant circulation circuit 1 by filling matchmaker's pipe 3, when coolant excess in refrigerant circulation circuit 1, and control
Unit processed then controls to open back matchmaker's valve 41, so that the coolant in refrigerant circulation circuit 1 is recycled to coolant storage dress by returning matchmaker's pipe 4
In putting 2, thus achieve being automatically adjusted of coolant quantity in refrigerant circulation circuit 1.Compared with prior art, the embodiment of the present invention
Coolant range of accommodation is unrestricted, therefore, it is possible to ensure that the refrigeration of coolant circulating system or heating operations are in optimal shape all the time
State.
In the above-described embodiments, coolant circulating system can apply to refrigerator, it is also possible to is applied to air-conditioning, it is also possible to application
In the refrigeration such as refrigerator and/or heating equipment, it is not specifically limited at this.But, the cooling and warming being conventional due to air-conditioner sets
Standby, when freezing and heat, the coolant quantity used differs greatly, and is therefore only applied to air-conditioner with coolant circulating system below and is
Example illustrates.
Wherein, coolant storage device 2 can be liquid storage container, and the material of liquid storage container can be with rustless steel or copper etc., at this
It is not specifically limited, as long as certain pressure and corrosion-free to coolant and machine oil or dissolve each other and act on can be born.
It addition, fill matchmaker's valve 31 and return matchmaker's valve 41 and be closed type valve, and fill matchmaker's valve 31 and return matchmaker's valve 41 can
Think gate valve, stop valve, plug valve, ball valve, butterfly valve, needle valve, diaphragm valve etc., be not specifically limited at this.But, owing to cutting
Only valve during opening and closing between sealing surface frictional force little, good compared with patience, Lift is less, easy to manufacture and easy to maintenance,
It is applicable to mesolow and high pressure scene, it is therefore preferable that fill matchmaker's valve 31 and return matchmaker's valve 41 for stop valve.
In order to avoid coolant storage device 2, fill matchmaker's pipe 3 and return matchmaker's pipe 4 and take up room the limited interior space, preferably
, coolant storage device 2, fill matchmaker's pipe 3 and return matchmaker's pipe 4 be arranged in air-conditioner outdoor unit, to avoid coolant storage device 2, to fill
Matchmaker's pipe 3 and return matchmaker's pipe 4 and take up room the limited interior space.Wherein, coolant storage device 2 can be arranged on outside air conditioner chamber
On median septum, base or side plate in machine, it is not specifically limited at this.
Concrete, detecting system 5 can include following three kinds of specific embodiments:
Embodiment one: detecting system 5 includes the first temperature detecting unit (not shown), the second temperature detecting unit
(not shown) and the 3rd temperature detecting unit 51, the first temperature detecting unit is for detecting vaporizer 14 porch coolant
Temperature T1, the second temperature detecting unit is for detecting temperature T2 of coolant, the 3rd temperature detecting unit in the middle part of vaporizer 14 pipeline
51 for detecting temperature T3 of coolant in compressor return air pipe 16, and the first temperature detecting unit, the second temperature detecting unit with
And the 3rd temperature detecting unit 51 be all connected with control unit.If thus T2-T1 ＞ 0, that is to say in the middle part of vaporizer 14 pipeline cold
The temperature of matchmaker is more than the temperature of vaporizer 14 porch coolant, then it represents that coolant before flowing in the middle part of vaporizer 14 pipeline
Evaporating, control unit i.e. can determine that the coolant shortcoming in refrigerant circulation circuit 1, and controls to open and fill matchmaker's valve 31, with to
Being filled with coolant in refrigerant circulation circuit 1, after matchmaker's valve 31 is filled in unlatching, if T2-T1≤0, control unit is then closed and is filled matchmaker's valve
Door 31 is to complete to fill matchmaker's process；If T3-T2 ＜ preset value, that is to say that the temperature of coolant exceeds vaporizer in compressor return air pipe 16
In the middle part of 14 pipelines, the value of refrigerant temperature is less than preset value, then it represents that coolant evaporates in vaporizer 14 the most completely, and control unit is i.e.
Can determine that the coolant excess in refrigerant circulation circuit 1, and control to open back matchmaker's valve 41, cold with by refrigerant circulation circuit 1
Matchmaker is recycled in coolant storage device 2, and after opening back matchmaker's valve 41, if T3-T2 >=preset value, control unit is then closed back
Matchmaker's valve 41 is to complete back matchmaker's process.
It should be noted that the evaporation process that coolant is in vaporizer 14 be absorbed heat from liquid phase after become the phase transformation of gas phase
Journey, during coolant flows in vaporizer 14, before producing phase transformation the most completely, its temperature will not produce change,
After producing phase transformation completely, the heat in external environment can be by, in conduction of heat conduction to coolant, making refrigerant temperature raise.
Wherein, preset value is to arrange in advance, and the setting of preset value, is to carry out mass data collection for same type
On the premise of, draw according to certain algorithm incorporating experience into.And for different type of machines, the preset value drawn is different.
It should be noted that the present embodiment arranges the vaporizer 14 of the first temperature detecting unit and the second temperature detecting unit
The vaporizer being not necessarily referring in process of refrigerastion, and refer to absorb heat for coolant and produce the heat exchanger of evaporation.Such as, air-conditioner bag
Include refrigeration and heat two kinds of processes, and being switched over by cross valve 8, wherein, when cross valve 8 switches to process of refrigerastion, ginseng
Seeing Fig. 2 (a), the cyclic process of coolant is: compressor 11 → condenser, 12 → choke valve, 13 → vaporizer, 14 → fluid reservoir 15 →
Compressor 11, coolant is evaporated in vaporizer 14, then the first temperature detecting unit and the second temperature detecting unit are arranged
In vaporizer 14；When cross valve 8 switches to heating operations, seeing Fig. 2 (b), the cyclic process of coolant is: compressor 11 →
Vaporizer 14 → choke valve, 13 → condenser, 12 → fluid reservoir, 15 → compressor 11, coolant is evaporated in condenser 12, then
First temperature detecting unit and the second temperature detecting unit are arranged in condenser 12.
Wherein, the coolant quantity in air-conditioner process of refrigerastion can be adjusted by the present embodiment, it is also possible to air-conditioner system
Coolant quantity in thermal process is adjusted, it is also possible to is all adjusted the coolant quantity in refrigeration and heating operations, does not does at this
Concrete restriction.When the coolant quantity in air-conditioner process of refrigerastion is adjusted, the first temperature detecting unit should be arranged in steaming
Send out device 14 pipeline and connect one end (that is to say the entrance of vaporizer 14) of choke valve 13, the second temperature detecting unit is arranged in steaming
Send out in the middle part of device 14 pipeline.When the coolant quantity during air conditioner heat-production is adjusted, should be by the first temperature detecting unit cloth
It is placed in condenser 12 pipeline and connects one end (that is to say the entrance of condenser 12) of choke valve 13, by the second temperature detecting unit cloth
It is placed in the middle part of condenser 12 pipeline.When the coolant quantity in air-conditioner refrigeration and heating operations is all adjusted, should be in condensation
Device 12 connects one end of choke valve 13, vaporizer 14 connects one end of choke valve 13 and arranges the first temperature detecting unit, in condensation
In the middle part of the pipeline of device 12, in the middle part of the pipeline of vaporizer 14, all arrange the second temperature detecting unit.
It should be noted that the muffler 16 of compressor is to lead back the gaseous coolant that vaporizer 14 is discharged to compressor 11
Pipeline section, including the first pipeline section and the second pipeline section, wherein, the first pipeline section is connected between vaporizer 14 and fluid reservoir 15, second
Pipeline section is connected between fluid reservoir 15 and compressor 11.Thus, the 3rd temperature detecting unit 51 can be arranged in the first pipeline section,
Can also be arranged in the second pipeline section, be not specifically limited at this.
Embodiment two: detecting system 5 includes pressure sensing cell 52, pressure sensing cell 52 is for detecting returning of compressor
Coolant pressure in trachea 16, and pressure sensing cell 52 is connected with control unit.If thus in P is less than preset threshold range
Minima, then it represents that the cold medium shortage in refrigerant circulation circuit 1, control unit determine the coolant in refrigerant circulation circuit 1 owe
Lack, and control to open to fill matchmaker's valve 31, to be filled with coolant in refrigerant circulation circuit 1, after matchmaker's valve 31 is filled in unlatching, if P
Being positioned at preset threshold range, control unit is then closed and is filled matchmaker's valve 31 to complete to fill matchmaker's process；If P is more than preset threshold range
Interior maximum, then it represents that the coolant in refrigerant circulation circuit 1 is too much, and control unit determines the coolant in refrigerant circulation circuit 1
Shortcoming, and control to open back matchmaker's valve 41, by the refrigerant recovering in refrigerant circulation circuit 1 to coolant storage device 2, to open
After opening back matchmaker's valve 41, if P is positioned at preset threshold range, control unit then closes back matchmaker's valve 41 to complete back matchmaker's mistake
Journey.
Wherein, preset threshold range is according between current environmental temperature and ambient temperature and optimal back pressure scope
Corresponding relation determined by, the optimal back pressure scope corresponding to ambient temperature, is under having been directed towards this ambient temperature
Same type carry out mass data collection on the premise of, draw according to certain algorithm incorporating experience into.And at different rings
Under conditions of the temperature of border, the optimal back pressure scope drawn is different.
It should be noted that owing to the refrigeration of air-conditioner is with to heat state different, coolant stream in refrigerant circulation circuit 1
The coolant quantity used at a temperature of difference, equivalent environment is the most different, the optimal back pressure scope that therefore ambient temperature is corresponding
Difference, the corresponding relation between ambient temperature from optimal back pressure is different, therefore in air-conditioner refrigeration or heating operations
Coolant quantity be adjusted, and when determining preset threshold range, need first according to current cooling and warming state, determine environment temperature
Spend the corresponding relation between optimal back pressure scope, then further according to current environmental temperature and determined by ambient temperature
And the corresponding relation between optimal back pressure scope, determines preset threshold range.
Embodiment three: detecting system 5 includes the first temperature detecting unit, the second temperature detecting unit, the 3rd temperature detection
Unit 51 and pressure sensing cell 52, the first temperature detecting unit is used for detecting temperature T1 of vaporizer 14 porch coolant, the
Two temperature detecting units are for detecting temperature T2 of coolant in the middle part of vaporizer 14 pipeline, and the 3rd temperature detecting unit 51 is used for detecting
Temperature T3 of coolant in compressor return air pipe 16, the pressure sensing cell 52 coolant pressure in the muffler 16 detecting compressor
Power P, and the first temperature detecting unit, the second temperature detecting unit, the 3rd temperature detecting unit 51 and pressure sensing cell 52
All it is connected with control unit.If thus T2-T1 ＞ 0, then it represents that coolant had evaporated before flowing in the middle part of vaporizer 14 pipeline
Complete, control unit i.e. can determine that the coolant shortcoming in refrigerant circulation circuit 1, and controls to open to fill matchmaker's valve 31, with to coolant
Closed circuit 1 is filled with coolant, after matchmaker's valve 31 is filled in unlatching, if T2-T1≤0, and P is positioned at preset threshold range, control
Unit processed is then closed and is filled matchmaker's valve 31 to complete to fill matchmaker's process；If T3-T2 ＜ preset value, P is more than described preset threshold range
Maximum, then it represents that coolant evaporates in vaporizer 14 the most completely, control unit i.e. can determine that the coolant in refrigerant circulation circuit 1
Excess, and control to open back matchmaker's valve 41, by the refrigerant recovering in refrigerant circulation circuit 1 to coolant storage device 2, to open
After opening back matchmaker's valve 41, if T3-T2 >=preset value, and P is positioned at preset threshold range, control unit then closes back matchmaker's valve
41 to complete back matchmaker's process.
By detection temperature difference, above-described embodiment one judges in refrigerant circulation circuit 1, whether coolant is short of or excess, on
State embodiment two and judge in refrigerant circulation circuit 1, whether coolant is short of or excess, above-described embodiment by detection back pressure
By detecting temperature difference and back pressure simultaneously, three judge in refrigerant circulation circuit 1, whether coolant is short of or excess, compared to
Above-described embodiment one and embodiment two, the condition of three bases of above-described embodiment is more, it is judged that more accurate, the most preferably detects system
The scheme of system 5 employing above-described embodiment three.
In order to the coolant in coolant storage device 2 is introduced in described refrigerant circulation circuit 1, fill matchmaker's pipe 3 can include with
Lower two kinds of concrete implementation modes:
The first implementation: fill matchmaker's pipe 3 and include filling matchmaker's tube body and being serially connected with the kinetic pump (figure filled on matchmaker's tube body
Not shown in), when filling matchmaker's valve 31 and opening, the liquid sucting port of kinetic pump connects with coolant storage device 2, and leakage fluid dram is cold with described
Matchmaker's closed circuit 1 connects, and thus the coolant in coolant storage device 2 can be filled with refrigerant circulation circuit under the effect of kinetic pump
In 1.
Wherein, kinetic pump can be arranged at and fill matchmaker's valve 31 and connect the side of coolant storage device 2, it is also possible to is arranged at and fills
Matchmaker's valve 31 connects the side of refrigerant circulation circuit 1, is not specifically limited at this.
The second implementation: see Fig. 1, Fig. 2 (a) or Fig. 2 (b), fills matchmaker's pipe 3 and connects one end of refrigerant circulation circuit 1
It is connected in the muffler 16 of compressor, owing to the coolant air pressure in the muffler 16 of compressor is relatively low, compared to this low pressure,
Pressure in coolant storage device 2 is higher, and thus when filling matchmaker's valve 31 and opening, coolant is just entered automatically by coolant storage device 2
Enter in refrigerant circulation circuit 1.
Compared to the first implementation above-mentioned, it is dynamic without concatenation that what above-mentioned the second implementation was used fills matchmaker's pipe 3
Power pump, therefore simple in construction, cost is relatively low, the most preferably fills matchmaker's pipe 3 and uses structure shown in above-mentioned the second implementation.
In like manner, in order to by the refrigerant recovering in refrigerant circulation circuit 1 to coolant storage device 2, returning matchmaker's pipe 4 can include
Following two concrete implementation mode:
The first concrete implementation mode: return matchmaker's pipe 4 include back matchmaker's tube body and be serially connected with back on matchmaker's tube body move
Power pump (not shown), when returning matchmaker's valve 41 and opening, the liquid sucting port of kinetic pump connects with described refrigerant circulation circuit 1, row
Liquid mouth connects with coolant storage device 2, thus can be by the refrigerant recovering in refrigerant circulation circuit 1 to cold under the effect of kinetic pump
In matchmaker's storage device 2.
Wherein, kinetic pump can be arranged at back matchmaker's valve 41 and connect the side of coolant storage device 2, it is also possible to is arranged at and fills
Matchmaker's valve 31 connects the side of refrigerant circulation circuit 1, is not specifically limited at this.
The second concrete implementation mode: see Fig. 1, Fig. 2 (a) or Fig. 2 (b), returns matchmaker's pipe 4 and connects refrigerant circulation circuit 1
One end be connected in the pipeline between condenser 12 and choke valve 13, due in the pipeline between condenser 12 and choke valve 13
Coolant pressure higher, compared to this elevated pressures, the pressure in coolant storage device 2 is relatively low, thus when return 41 dozens, matchmaker's valve
When opening, coolant just by refrigerant circulation circuit 1 automatically in coolant storage device 2.
Compared to the first concrete implementation mode above-mentioned, what above-mentioned the second concrete implementation mode was used returns matchmaker's pipe
4 without concatenating kinetic pump, therefore simple in construction, and cost is relatively low, the most preferably returns matchmaker's pipe 4 and uses above-mentioned the second side of implementing
Structure shown in formula.
It is back in coolant storage device 2 to prevent the coolant edge in refrigerant circulation circuit 1 from filling matchmaker's pipe 3, it is preferred that as
Fig. 1, Fig. 2 (a) or Fig. 2 (b) are shown, fill and are serially connected with the first check valve 6 on matchmaker's pipe 3, and the first check valve 6 only allows to fill in matchmaker's pipe 3
Coolant flowed to coolant circulating system by coolant storage device 2, thus prevent coolant in refrigerant circulation circuit 1 along filling matchmaker's pipe
3 are back in coolant storage device 2.
Wherein, the first check valve 6 can be arranged at and fill matchmaker's valve 31 and connect the side of coolant storage device 2, it is also possible to set
It is placed in and fills matchmaker's valve 31 and connect the side of refrigerant circulation circuit 1, be not specifically limited at this.
In like manner, in order to prevent the coolant in coolant storage device 2 to be back in refrigerant circulation circuit 1, preferably along returning matchmaker's pipe 4
, (a) or Fig. 2 (b) are shown as shown in Figure 1, Figure 2, return and are serially connected with the second check valve 7 on matchmaker's pipe 4, and the second check valve 7 only allows back matchmaker
Coolant in pipe 4 is flowed to coolant storage device 2 by coolant circulating system, thus prevent the coolant edge in coolant storage device 2
Return matchmaker's pipe 4 to be back in refrigerant circulation circuit 1.
Wherein, the second check valve 7 can be arranged at back matchmaker's valve 41 and connect the side of coolant storage device 2, it is also possible to set
It is placed in back matchmaker's valve 41 and connects the side of refrigerant circulation circuit 1, be not specifically limited at this.
In coolant circulating system irrigate coolant time, can only in refrigerant circulation circuit 1 irrigate, it is also possible to respectively to
Perfusion in refrigerant circulation circuit 1 and coolant storage device 2.When using the first scheme above-mentioned, in refrigerant circulation circuit 1
Coolant quantity be adjusted before, matchmaker's valve 41 need to be opened back, to reclaim a certain amount of coolant in coolant storage device 2, with
Ensureing effectively carrying out of regulation, this operating process is complicated.Therefore to avoid the problems referred to above, preferably in coolant circulating system
During perfusion coolant, in refrigerant circulation circuit 1 and coolant storage device 2, irrigate coolant respectively, thus avoid and coolant is being followed
Coolant quantity in loop back path 1 be adjusted before return matchmaker's operation, control process simple, and in ensure that coolant circulating system
Coolant before not regulation, belong to an optimum state (belonging to optimum state the most at normal temperatures).Concrete, refrigerant circulation returns
Coolant in road 1 can be poured into by the note matchmaker's mouth on compressor 11, and in order to inject coolant to coolant storage device, such as figure
1, shown in Fig. 2 (a) or Fig. 2 (b), also including noting matchmaker's pipe 9, note matchmaker's pipe 9 is for injecting coolant, and note in coolant storage device 2
Matchmaker's pipe is provided with note matchmaker's valve 91, when this note matchmaker's valve 91 is opened, can inject coolant in coolant storage device 2.
Concrete, the link position of note matchmaker's pipe 9 can be that (a) or Fig. 2 (b) are shown as shown in Figure 1, Figure 2, i.e. going out of note matchmaker's pipe 9
What mouth end was connected to back between matchmaker's valve 41 and coolant storage device 2 returns on matchmaker's pipe 4, thus note matchmaker's pipe 9 and time common shape of matchmaker's pipe 4
Two flow into branch and an outflow branch to have become Y-pipe, Y-pipe to include, two flow into branches and are respectively used to note matchmaker and return
Matchmaker, flows out branch and is connected with coolant storage device, it is to avoid additionally offer the cold mouth of note on coolant storage device 2, and Y-pipe is
For common structure, therefore manufacturing process is simple, and cost of manufacture is relatively low.
Seeing Fig. 3, the embodiment of the present invention additionally provides the control method of a kind of coolant circulating system, this control method based on
A kind of coolant circulating system that the embodiment of the present invention provides, comprises the following steps:
Coolant parameter in S1, detecting system detection refrigerant circulation circuit；
The coolant parameter that S2, control unit detect according to described detecting system, it is judged that cold in described refrigerant circulation circuit
Whether matchmaker is short of or excess；
S3, when in described refrigerant circulation circuit coolant be short of time, control unit control open described in fill matchmaker's valve, work as institute
When stating the coolant excess in refrigerant circulation circuit, control unit then controls to open described time matchmaker's valve.
The control method of a kind of coolant circulating system that the embodiment of the present invention provides, detecting system detection obtains refrigerant circulation
After coolant parameter in loop, control unit according to the coolant parameter that detecting system detects judge in coolant circulating system cold
Whether matchmaker is short of or excess, when the coolant in refrigerant circulation circuit is short of, and control unit then controls to open fills matchmaker's valve, so that cold
Coolant in matchmaker's storage device is filled with in refrigerant circulation circuit by filling matchmaker's pipe, when coolant excess in refrigerant circulation circuit, and control
Unit processed then controls to open back matchmaker's valve, so that the coolant in refrigerant circulation circuit is recycled to coolant storage device by returning matchmaker's pipe
In, thus achieve being automatically adjusted of coolant quantity in refrigerant circulation circuit.Compared with prior art, the coolant of the embodiment of the present invention
Range of accommodation is unrestricted, therefore, it is possible to ensure that the refrigeration of coolant circulating system or heating operations are in optimum state all the time.
In the embodiment shown in fig. 3, detecting system includes the first temperature detecting unit, the second temperature detecting unit and
Three temperature detecting units, the first temperature detecting unit is for detecting temperature T1 of evaporator pipeline porch, the second temperature detection
Unit is for detecting temperature T2 in the middle part of evaporator pipeline, and the 3rd temperature detecting unit is for detecting evaporator pipeline exit
Temperature T3, step S2 includes:
S21, as T2-T1 ＞ 0, control unit determine in refrigerant circulation circuit coolant shortcoming；
Accordingly, the most also including: when T2-T1≤0, control unit controls closedown and fills matchmaker's valve；
S22, when T3-T2 ＜ preset value, control unit determine in refrigerant circulation circuit coolant excess；
Accordingly, the most also including: when T3-T2 >=preset value, control unit controls to close back matchmaker's valve.
In the embodiment shown in fig. 3, detecting system includes that pressure sensing cell, pressure sensing cell are used for detecting compression
Coolant pressure P in the muffler of machine, step S2 includes:
S21 ', when P is less than the minima of preset threshold range, control unit determines that the coolant in refrigerant circulation circuit is owed
Lack；
Accordingly, the most also including: when P is positioned at preset threshold range, control unit controls closedown and fills
Matchmaker's valve；
S22 ', when P is more than the maximum of preset threshold range, control unit determines the coolant mistake in refrigerant circulation circuit
Amount；
Accordingly, the most also including: when P is positioned at preset threshold range, control unit controls to close back
Matchmaker's valve.
In the embodiment shown in fig. 3, detecting system include the first temperature detecting unit, the second temperature detecting unit,
Three temperature detecting units and pressure sensing cell, the first temperature detecting unit is for detecting the temperature of evaporator pipeline porch
T1, the second temperature detecting unit is for detecting temperature T2 in the middle part of evaporator pipeline, and the 3rd temperature detecting unit is used for detecting steaming
Send out temperature T3 at device tube outlet, pressure sensing cell coolant pressure P in the muffler detecting compressor, step S2
Including:
S21 ", as T2-T1 ＞ 0, control unit determine in refrigerant circulation circuit coolant shortcoming；
Accordingly, the most also include: when T2-T1≤0, and when P is positioned at preset threshold range, control unit
Control closedown and fill matchmaker's valve；
S22 ", when T3 T2 ＜ preset value, and P more than the maximum of preset threshold range time, control unit determines that coolant follows
Coolant excess in loop back path；
Accordingly, the most also include: when T3-T2 >=preset value, and when P is positioned at preset threshold range, control
Unit processed controls closedown and fills matchmaker's valve.
In the description of this specification, specific features, structure, material or feature can be in any one or more realities
Execute in example or example and combine in an appropriate manner.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with described scope of the claims.
Claims (13)
1. a coolant circulating system, including be sequentially connected with and constitute the compressor of refrigerant circulation circuit, condenser, choke valve,
Vaporizer and fluid reservoir, it is characterised in that also include that coolant storage device, described coolant storage device return with described refrigerant circulation
Connect between road to have and fill matchmaker's pipe and return matchmaker's pipe, described in fill to be serially connected with on matchmaker's pipe and fill matchmaker's valve, described time matchmaker's pipe is serially connected with back matchmaker
Valve,
Also including detecting system and control unit, described detecting system is for detecting the coolant ginseng in described refrigerant circulation circuit
Amount, described control unit is for the testing result according to described detecting system, it is judged that the coolant quantity in described refrigerant circulation circuit
Whether be short of or excess, when in described refrigerant circulation circuit coolant quantity be short of time, control open described in fill matchmaker's valve, described cold
Coolant in matchmaker's storage device is filled with in described refrigerant circulation circuit by the described matchmaker's of filling pipe, cold when in described refrigerant circulation circuit
During matchmaker's excess, controlling to open described time matchmaker's valve, the coolant in described refrigerant circulation circuit is recycled to described by described time matchmaker's pipe
In coolant storage device.
Coolant circulating system the most according to claim 1, it is characterised in that described detecting system includes the first temperature detection
Unit, the second temperature detecting unit and the 3rd temperature detecting unit, described first temperature detecting unit is used for detecting described evaporation
The temperature of device porch coolant, described second temperature detecting unit is used for detecting the temperature of coolant in the middle part of described evaporator pipeline,
Described 3rd temperature detecting unit is the temperature of coolant in detecting described compressor return air pipe, and described first temperature detection list
Unit, the second temperature detecting unit and the 3rd temperature detecting unit are all connected with described control unit.
Coolant circulating system the most according to claim 1 and 2, it is characterised in that described detecting system includes pressure detecting
Unit, described pressure sensing cell coolant pressure in the muffler detecting described compressor, and described pressure detecting list
First and described control unit is connected.
Coolant circulating system the most according to claim 1, it is characterised in that described in fill matchmaker's pipe connect described refrigerant circulation return
The one end on road is connected in the muffler of described compressor.
Coolant circulating system the most according to claim 1, it is characterised in that described time matchmaker's pipe connects described refrigerant circulation and return
The one end on road is connected in the pipeline between described condenser and described choke valve.
6. according to the coolant circulating system described in claim 1 or 4, it is characterised in that described in fill that to be serially connected with first on matchmaker's pipe single
To valve, described first check valve only allow described in fill in matchmaker's pipe coolant flowed to described refrigerant circulation by described coolant storage device
System.
Coolant circulating system the most according to claim 1 or 5, it is characterised in that be serially connected with second on described time matchmaker's pipe single
To valve, described second check valve only allows the described coolant returned in matchmaker's pipe to be flowed to the storage of described coolant by described coolant circulating system
Device.
Coolant circulating system the most according to claim 1, it is characterised in that also include noting matchmaker's pipe, described note matchmaker's pipe is used for
In described coolant storage device, inject coolant, and described note matchmaker's pipe is provided with note matchmaker's valve.
Coolant circulating system the most according to claim 8, it is characterised in that the port of export of described note matchmaker's pipe is connected to described
Return returning on matchmaker's pipe between matchmaker's valve and described coolant storage device.
10. the control method of the coolant circulating system being applied to described in claim 1, it is characterised in that include following step
Rapid:
Coolant parameter in S1, detecting system detection refrigerant circulation circuit；
The coolant parameter that S2, control unit detect according to described detecting system, it is judged that the coolant in described refrigerant circulation circuit is
No shortcoming or excess；
S3, when in described refrigerant circulation circuit coolant be short of time, control unit control open described in fill matchmaker's valve, when described cold
During coolant excess in matchmaker's closed circuit, control unit then controls to open described returns matchmaker's valve.
11. control methods according to claim 10, it is characterised in that described detecting system includes the first temperature detection list
Unit, the second temperature detecting unit and the 3rd temperature detecting unit, described first temperature detecting unit is used for detecting described vaporizer
Temperature T1 at line entry, described second temperature detecting unit is for detecting temperature T2 in the middle part of described evaporator pipeline, institute
Stating the 3rd temperature detecting unit for detecting temperature T3 in described evaporator pipeline exit, described step S2 includes:
S21, as T2-T1 ＞ 0, described control unit determine in described refrigerant circulation circuit coolant shortcoming；
Accordingly, also including after described step S3: when T2-T1≤0, described control unit controls to fill matchmaker's valve described in closedown
Door；
S22, when T3-T2 ＜ preset value, described control unit determine in described refrigerant circulation circuit coolant excess；
Accordingly, also including after described step S3: when T3-T2 >=described preset value, described control unit controls to close
Described time matchmaker's valve.
12. control methods according to claim 10, it is characterised in that described detecting system includes pressure sensing cell,
Described pressure sensing cell coolant pressure P in the muffler detecting described compressor, step S2 includes:
S21 ', when P is less than the minima of preset threshold range, it is cold that described control unit determines in described refrigerant circulation circuit
Matchmaker is short of；
Accordingly, also include after described step S3: when P is positioned at described preset threshold range, described control unit control
System fills matchmaker's valve described in closing；
S22 ', when P is more than the maximum of described preset threshold range, described control unit determines in described refrigerant circulation circuit
Coolant excess；
Accordingly, also include after described step S3: when P is positioned at described preset threshold range, described control unit control
System closes described time matchmaker's valve.
13. control methods according to claim 10, it is characterised in that described detecting system includes the first temperature detection list
Unit, the second temperature detecting unit, the 3rd temperature detecting unit and pressure sensing cell, described first temperature detecting unit is used for examining
Surveying temperature T1 of described evaporator pipeline porch, described second temperature detecting unit is used for detecting in the middle part of described evaporator pipeline
Temperature T2, described 3rd temperature detecting unit is for detecting temperature T3 in described evaporator pipeline exit, and described pressure is examined
Surveying unit coolant pressure P in the muffler detecting described compressor, step S2 includes:
S21 ", as T2-T1 ＞ 0, described control unit determine in described refrigerant circulation circuit coolant shortcoming；
Accordingly, also include after described step S3: when T2-T1≤0, and when P is positioned at preset threshold range, described control
Unit controls to fill matchmaker's valve described in closedown；
S22 ", when T3 T2 ＜ preset value, and P more than the maximum of described preset threshold range time, described control unit determines institute
State the coolant excess in refrigerant circulation circuit；
Accordingly, also include after described step S3: when T3-T2 >=preset value, and P is positioned at described preset threshold range
Time, described control unit controls to fill matchmaker's valve described in closedown.
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| CN106766299A (en) * | 2016-12-29 | 2017-05-31 | 青岛海尔股份有限公司 | The control method of refrigerating plant, the refrigerator with the refrigerating plant and refrigerator |
| CN107796148A (en) * | 2017-10-20 | 2018-03-13 | 珠海格力电器股份有限公司 | Coolant circulating system and its control method |
| CN108332462A (en) * | 2018-03-29 | 2018-07-27 | 广东纽恩泰新能源科技发展有限公司 | A kind of refrigerant self-balancing device for storing liquid |
| CN110529966A (en) * | 2019-09-09 | 2019-12-03 | 宁波奥克斯电气股份有限公司 | A kind of change coolant quantity air-conditioning system and its control method |
| CN110762647A (en) * | 2019-10-16 | 2020-02-07 | 珠海格力电器股份有限公司 | Central air-conditioning system and control method thereof |
| CN111156746A (en) * | 2020-01-07 | 2020-05-15 | 青岛海尔电冰箱有限公司 | Refrigeration system, control method, refrigerator and storage medium |
| CN114370689A (en) * | 2022-01-27 | 2022-04-19 | 宁波奥克斯电气股份有限公司 | Refrigerant charge amount determination method, control method, air conditioner, and storage medium |
| CN114659233A (en) * | 2022-03-28 | 2022-06-24 | 青岛海尔空调器有限总公司 | Air conditioner and control method for air conditioner |
| WO2023279725A1 (en) * | 2021-07-06 | 2023-01-12 | 青岛海尔空调器有限总公司 | Refrigerant recovery system and method |
| CN117280168A (en) * | 2021-04-30 | 2023-12-22 | 大金工业株式会社 | Refrigeration cycle system and refrigerant recovery device |
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Address after: 528303 No. 8, Rong Gang Road, Ronggui street, Shunde District, Foshan, Guangdong. Co-patentee after: Hisense (Guangdong) Air Conditioner Co., Ltd. Patentee after: Haixin Home Appliances Group Co., Ltd. Address before: 528303 No. 8, Rong Gang Road, Ronggui street, Shunde District, Foshan, Guangdong. Co-patentee before: Hisense (Guangdong) Air Conditioner Co., Ltd. Patentee before: Hisense Kelon Electrical Holdings Co., Ltd. |
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