CN104534752B - Refrigerant filling system and method and air conditioning unit - Google Patents
Refrigerant filling system and method and air conditioning unit Download PDFInfo
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- CN104534752B CN104534752B CN201510039334.4A CN201510039334A CN104534752B CN 104534752 B CN104534752 B CN 104534752B CN 201510039334 A CN201510039334 A CN 201510039334A CN 104534752 B CN104534752 B CN 104534752B
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- coolant
- cooling medium
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 39
- 238000004378 air conditioning Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 239000002826 coolant Substances 0.000 claims description 319
- 230000010412 perfusion Effects 0.000 claims description 15
- 238000004781 supercooling Methods 0.000 claims description 10
- 230000004087 circulation Effects 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims 1
- 238000007689 inspection Methods 0.000 claims 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 12
- 229910052731 fluorine Inorganic materials 0.000 description 12
- 239000011737 fluorine Substances 0.000 description 12
- 238000012356 Product development Methods 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 8
- 230000017531 blood circulation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 241000208340 Araliaceae Species 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/001—Charging refrigerant to a cycle
-
- 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
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/003—Control issues for charging or collecting refrigerant to or from a cycle
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention relates to a refrigerant filling system, a refrigerant filling method and an air conditioning unit, wherein the refrigerant filling system comprises a refrigerant detection device and a refrigerant filling device, the refrigerant detection device is used for detecting parameters of a refrigerant circulating system and judging whether the detected parameters of the refrigerant circulating system reach set judgment conditions, and if the detected parameters of the refrigerant circulating system reach the set judgment conditions, refrigerants are filled into the refrigerant circulating system through the refrigerant filling device. The refrigerant filling system provided by the invention can fill the refrigerant through the refrigerant filling device under the condition that the refrigerant detection device detects that the refrigerant is lack, so that part of links for manually filling the refrigerant are saved, and the cost is reduced.
Description
Technical field
The present invention relates to refrigerating field, particularly relate to a kind of cooling medium charging system, method and air conditioner
Group.
Background technology
The commercial air conditioning system of variable refrigerant volume in the market, such as connected machine, unit machine
Deng, after product engineering is installed, adding of pipeline coolant, the especially system coolant after after-sales service
Add, be all that commissioning staff or maintainer rule of thumb data judge or the artificial coolant quantity that calculates enters
Row perfusion.
Owing to engineering connecting leg is complicated, length of pipe is difficult to accurately calculate, and debugs examination and maintenance people simultaneously
The professional standards of member are had nothing in common with each other, and after after-sales service, required coolant quantity is difficult to accurately judge, very in addition
When easily causing additional coolant, the situation that perfusion is too much or very few occurs, the most not only cause coolant
Significant wastage, also directly affect air conditioning unit reliability of operation and comfortableness.
Summary of the invention
The purpose of the present invention is to propose to a kind of cooling medium charging system, method and air conditioning unit, its without
Manually detecting coolant quantity and irrigate, reliability is higher.
For achieving the above object, the invention provides a kind of cooling medium charging system, it includes coolant
Detection device and cooling medium charging device, described coolant detection device is used for detecting coolant circulating system
Parameter, and judge whether the parameter of coolant circulating system detected reaches the judgement bar set
Part, if reaching the Rule of judgment set, then by described cooling medium charging device to refrigerant circulation
System irrigates coolant.
One preferably or in alternative embodiment, described cooling medium charging device includes being connected on for side cold
Cooling medium charging branch road in matchmaker's blood circulation, the input of described cooling medium charging branch road connects coolant
Storage tank, described cooling medium charging branch road is provided with cooling medium charging valve.
One preferably or in alternative embodiment, along coolant flow direction, described cooling medium charging branch road
On, the rear of described cooling medium charging valve is provided with coolant speed regulator.
One, preferably or in alternative embodiment, described coolant speed regulator is capillary tube or choke valve.
One preferably or in alternative embodiment, along coolant flow direction, described cooling medium charging branch road
On, the front of described cooling medium charging valve is provided with filter.
One, preferably or in alternative embodiment, close described cooling medium charging branch road is deposited with described coolant
The position of storage tank connection is additionally provided with hand stop valve.
One, preferably or in alternative embodiment, described coolant detection device includes detecting element and ratio
Relatively judgment component, described detecting element electrically connects described multilevel iudge element, described detecting element
For detecting the parameter of coolant circulating system, and the parameter detected is sent to sentence described comparison
Disconnected element, the parameter of the parameter received with its internal preset is compared by described multilevel iudge element
Relatively, when reaching default Rule of judgment, send signal, demonstrate the need for irrigating coolant.
One, preferably or in alternative embodiment, described coolant detection device also includes display element,
And/or, alarm element, described display element and/or described alarm element electrically connect described comparison
Judgment component.
One, preferably or in alternative embodiment, described cooling medium charging system also includes controller, institute
State controller and electrically connect described multilevel iudge element and described cooling medium charging valve, when described controller
After receiving the signal needing to irrigate coolant that described multilevel iudge element sends, control described cold
Matchmaker's pouring valve is opened, and irrigates coolant.
One preferably or in alternative embodiment, described controller presets the first setting time and
Second sets the time；
Set when the time that the described controller described cooling medium charging valve of control is opened reaches described first
During the time, described controller controls described cooling medium charging valve and cuts out；
When the time that described cooling medium charging valve cuts out reaches the described second setting time, described control
Device processed checks whether and receives the signal needing to irrigate coolant that described multilevel iudge element sends；As
Fruit receives signal, and described controller controls described cooling medium charging valve and opens.
Preferably or in alternative embodiment, described controller was additionally provided with the 3rd setting time one,
When coolant circulating system carries out when reaching the described 3rd setting time total time of cooling medium charging, institute
State controller and control the closedown of described cooling medium charging valve.
For achieving the above object, present invention also offers a kind of based in any of the above-described embodiment
The method for perfusing refrigerant of cooling medium charging system, it comprises the steps:
By the parameter of coolant detection device detection coolant circulating system, when the coolant detected follows
When the parameter of loop systems reaches the Rule of judgment set, by cooling medium charging device to refrigerant circulation
System irrigates coolant.
One preferably or in alternative embodiment, method for perfusing refrigerant specifically uses following steps:
S1) by the ginseng of the detecting element detection coolant circulating system in described coolant detection device
Number, and the parameter detected is sent to the multilevel iudge element in described coolant detection device,
The parameter of the parameter received with its internal preset is compared by described multilevel iudge element, when reaching
During to the Rule of judgment preset, send the signal of perfusion coolant to controller；
S2) the cooling medium charging valve during described controller controls described cooling medium charging device is opened, and fills
Note coolant；
S3) time opened when described cooling medium charging valve reaches the first setting in described controller
During the time, described controller controls described cooling medium charging valve and cuts out；
S4) time closed when described cooling medium charging valve reaches the second setting in described controller
During the time, described controller checks whether that receive that described multilevel iudge element sends needs perfusion
The signal of coolant, as received signal, returns step S2), as confiscated signal, cooling medium charging
Terminate.
For achieving the above object, present invention also offers a kind of air conditioning unit, it includes above-mentioned
Cooling medium charging system in one embodiment.
One, preferably or in alternative embodiment, the detecting element in described coolant detection device includes
Indoor set inlet pipe detector unit, indoor machine evaporation degree of superheat detecting element, refrigerant circulation
System low-voltage value detecting element, off-premises station subcooler degree of supercooling detecting element and compressor air-discharging mistake
One in temperature detecting element, or several combinations.
One, preferably or in alternative embodiment, described coolant detects the comparison judgment unit in device,
Rule of judgment preset in it includes the combination of following one or more:
Set time detecting continuously to arrive: interior machine coil pipe inlet pipe temperature >=15 of start～25 DEG C；
Set time detecting continuously to arrive: coolant circulating system low pressure correspondence saturation temperature Td≤T1,
The span of T1 is-15 DEG C～10 DEG C；
Set time detecting continuously to arrive: degree of supercooling Tsc1≤T2 of coolant circulating system, T2 takes
Value scope is 0～15 DEG C；
Set time detecting continuously to arrive: coolant circulating system secondary degree of supercooling Tsc2≤T3, T3 takes
Value scope is 5 DEG C～25 DEG C；
Set time detecting continuously to arrive: air conditioning unit any one compressor discharge superheat
The span of Toh >=T4, T4 is 0～20 DEG C.
Based on technique scheme, the present invention at least has the advantages that
The present invention provide cooling medium charging system, it is possible to coolant detection device detect lack cold
Under the situation of matchmaker, carried out the perfusion of coolant by cooling medium charging device, save part artificial
The link of coolant, reduces cost.
One, preferably or in alternative embodiment, cooling medium charging system, by arranging controller, has certainly
Dynamic perfusion functional, by this automatic filling function, it is possible to needed for automatically determining coolant circulating system
Refrigerant super-addition amount, after connecting coolant storage tank, is irrigated automatically；And after after-sales service,
Cooling medium charging amount needed for this automatic filling function, accurate judgement system can be passed through, and connect coolant
Automatically it is irrigated after storage tank；In similar New Product Development Process, by this automatic filling merit
Can, it is possible to primarily determine that specified perfusion coolant quantity.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the application
A part, the schematic description and description of the present invention is used for explaining the present invention, not structure
Become inappropriate limitation of the present invention.In the accompanying drawings:
The part-structure block diagram of the cooling medium charging system that Fig. 1 provides for the present invention；
The structure that the cooling medium charging device that Fig. 2 provides for the present invention is connected on coolant circulating system
Schematic diagram；
Fig. 3 applies at air conditioner for a specific embodiment of the cooling medium charging system that the present invention provides
The control flow schematic diagram of coolant automatic filling is carried out in group.
Label in accompanying drawing:
1-compressor；2-four-way change-over valve；3-gas-liquid separator；4-outdoor unit heat exchanger；5-is indoor
Machine heat exchanger；6-capillary tube；7-cooling medium charging valve；8-filter；9-hand stop valve；10-throttles
Valve；11-subcooler；
20-detecting element；21-multilevel iudge element；22-controller；23-display element；24-reports to the police
Element.
Detailed description of the invention
Below in conjunction with the accompanying drawing 1-3 in the embodiment of the present invention, the technical scheme in embodiment is carried out
Clearly and completely describe.Obviously, described embodiment is only the part enforcement of the present invention
Example rather than whole embodiments.Based on embodiments of the invention, those of ordinary skill in the art
The every other embodiment obtained under not making creative work premise, broadly falls into the present invention
The scope of protection.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ",
"front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward "
Deng instruction orientation or position relationship be based on orientation shown in the drawings or position relationship, be only for
It is easy to describe the present invention and simplifying describe rather than instruction or the device of hint indication or element
Must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that right
The restriction of scope.
In the illustrative examples of the cooling medium charging system of present invention offer, cooling medium charging system
Including coolant detection device and cooling medium charging device, coolant detection device is used for detecting refrigerant circulation
The parameter of system, and judge whether the parameter of the coolant circulating system detected reaches sentencing of setting
Broken strip part, if reaching the Rule of judgment set, then by cooling medium charging device to refrigerant circulation
System irrigates coolant.
As in figure 2 it is shown, in the illustrative examples of the cooling medium charging system of present invention offer,
Cooling medium charging device includes the cooling medium charging branch road being connected on coolant circulating system for side, coolant
The input of perfusion branch road connects coolant storage tank, and cooling medium charging branch road is provided with cooling medium charging
Valve 7, by controlling the open and close controlling cooling medium charging amount of cooling medium charging valve 7.Along coolant flow direction,
On cooling medium charging branch road, the front of cooling medium charging valve 7 can be provided with filter 8, and coolant fills
The rear of note valve 7 can be provided with capillary tube 6, by arranging filter 8, is possible to prevent impurity
Enter coolant circulating system, by the coolant during arranging capillary tube 6 and can slowing down automatic filling
Flow velocity, in order to control cooling medium charging amount, and capillary tube 6 may be replaced by regulating flow
Choke valve, capillary tube 6 and choke valve belong to coolant speed regulator.
It is also provided with near the position that cooling medium charging branch road connects with coolant storage tank manually cutting
Only valve 9, before starting automatic filling, needs manually opened hand stop valve 9, terminates at automatic filling
After, need manual-lock hand stop valve 9, isolation coolant circulating system and external environment, prevent coolant
Secondary refrigerant leakage in blood circulation.
In above-mentioned illustrative examples, the flow direction of coolant is for passing sequentially through hand stop valve 9, mistake
Filter 8, cooling medium charging valve 7, capillary tube 6 enter coolant circulating system.
As it is shown in figure 1, in the illustrative examples of the cooling medium charging system of present invention offer,
Coolant detection device includes detecting element 20 and multilevel iudge element 21, and detecting element 20 is electrically connected
Connecing multilevel iudge element 21, detecting element 20 is used for detecting the parameter of coolant circulating system, and
The parameter detected sends to multilevel iudge element 21, and multilevel iudge element 21 will receive
Parameter compares with the parameter of its internal preset, when reaching default Rule of judgment, sends
Signal, demonstrates the need for irrigating coolant.
Use the coolant detection device that the present invention provides, it is not necessary to manually check coolant circulating system
Whether lack coolant, and in the case of needs perfusion coolant, it is possible to remind user, reduce
Cost of labor.
In above-mentioned illustrative examples, detecting element 20 can use temperature sensor or foil gauge
Deng the components and parts can bought on market；Multilevel iudge element 21 can use the cities such as decision circuitry
The components and parts can bought on field.
As it is shown in figure 1, in the illustrative examples of the cooling medium charging system of present invention offer,
Coolant detection device can also include display element 23, and/or, alarm element 24, display unit
Part 23 and/or alarm element 24 electrically connect multilevel iudge element 21, when multilevel iudge element 21
Judge when the parameter that receives reaches default Rule of judgment, be signaled to display element 23 and/
Or alarm element 24, carry out showing and/or reporting to the police, demonstrate the need for irrigating coolant.
In above-mentioned illustrative examples, display element 23 can use display；Alarm element
24 can use audible-visual annunciator.
As it is shown in figure 1, in the illustrative examples of the cooling medium charging system of present invention offer,
Cooling medium charging system can also include controller 22, is capable of cold by arranging controller 22
Matchmaker irrigates the coolant automatic filling of system.Controller 22 electrically connects the comparison in coolant detection device
Cooling medium charging valve 7 in judgment component 21 and cooling medium charging device, when controller 22 receives
What multilevel iudge element 21 sent need irrigate the signal of coolant after, control cooling medium charging valve 7
Open, irrigate coolant.
In the illustrative examples of the cooling medium charging system of present invention offer, can in controller 22
To preset the first setting time and the second setting time.
When controller 22 control the time that cooling medium charging valve 7 opens reached for the first setting time time,
Controller 22 controls cooling medium charging valve 7 and cuts out；First setting time can be the X second, X's
Span can be 10～100.
When the time that cooling medium charging valve 7 cuts out reached for the second setting time, controller 22 checks
Whether receive the signal needing to irrigate coolant that multilevel iudge element 21 sends；If receiving letter
Number, controller 22 controls cooling medium charging valve 7 and opens.Second setting time can be the Y second, Y
Span can be 10～200.
In the illustrative examples of the cooling medium charging system of present invention offer, in controller 22 also
Can preset for the 3rd setting time, when cooling medium charging system carries out coolant to coolant circulating system
When the time of perfusion reached for the 3rd setting time, controller 22 controls cooling medium charging valve 7 and cuts out,
System exits automatic filling pattern, and automatic filling terminates.3rd setting time can be Z minute,
The span of Z can be 5～40.
The cooling medium charging based on the cooling medium charging system in any of the above-described embodiment that the present invention provides
Method, it comprises the steps:
By the parameter of coolant detection device detection coolant circulating system, when the coolant detected follows
When the parameter of loop systems reaches the Rule of judgment set, by cooling medium charging device to refrigerant circulation
System irrigates coolant.
Above-mentioned method for perfusing refrigerant, specifically can use following steps:
S1) ginseng of coolant circulating system is detected by the detecting element 20 in coolant detection device
Number, and the parameter detected is sent to the multilevel iudge element 21 in coolant detection device, than
The parameter of the parameter received with its internal preset is compared by relatively judgment component 21, when reaching pre-
If Rule of judgment time, send perfusion coolant signal to controller 22；
S2) the cooling medium charging valve 7 during controller 22 controls cooling medium charging device is opened, and irrigates cold
Matchmaker；
S3) time opened when cooling medium charging valve 7 reaches the first setting time in controller 22
Time, controller 22 controls cooling medium charging valve 7 and cuts out；
S4) time closed when cooling medium charging valve 7 reaches the second setting time in controller 22
Time, controller 22 checks whether that needing of receiving that multilevel iudge element 21 sends irrigates coolant
Signal, if receiving signal, returns step S2), if confiscating signal, cooling medium charging is tied
Bundle.
In above-mentioned method for perfusing refrigerant, the control by cooling medium charging valve 7: cooling medium charging valve 7
Opening time closes after reaching for the first setting time, after the shut-in time reached for the second setting time, then
The secondary operating mode judging whether " lacking coolant to run " occurs, more back and forth it is controlled action by this, use
Be the control thinking of " having more meals a day but less food at each ", it is therefore intended that cooling medium charging amount is accurately controlled.
The present invention controls cooling medium charging system realize automatic filling coolant by arranging controller 22, tool
Have the advantage that
1) during project installation: the link of part manual operation perfusion coolant can be saved, all
As: manually calculate coolant quantity, manually check that systematic parameter judges coolant quantity etc., save labour cost,
Also avoid the waste that artificial incorrect operation causes simultaneously.
2) in maintenance process after sale: owing to the coolant quantity of coolant circulating system cannot determine, in the past
A lot of engineerings be all coolant is all discharged after the most again irrigate.Use the automatic filling that the present invention provides
Pouring functions, only need to carry out simple refrigerant recovering before maintenance, after having keeped in repair, can automatically sentence
Refrigerant super-addition amount needed for disconnected coolant circulating system, not only reduces coolant cost, but also alleviates
Pollution to environment, can also be greatly shortened the downtime that maintenance causes simultaneously, accelerate maintenance
Project progress.
3) during new product development: by automatic filling function, new product development can be greatly reduced
During, it is time-consuming that coolant quantity mates, and accelerates new product development speed.
The cooling medium charging system that the present invention provides mainly can be applied at the business air conditioner becoming coolant system
Or on refrigerator.
As in figure 2 it is shown, in the air conditioning unit illustrative examples that the present invention provides, air-conditioning
Unit can include compressor 1, four-way change-over valve 2, gas-liquid separator 3, outdoor unit heat exchanger 4,
Indoor set heat exchanger 5, subcooler 11 (board-like or double pipe heat exchanger) and choke valve 10, also may be used
To include the cooling medium charging system in any of the above-described embodiment, or, only include any of the above-described reality
Execute the coolant detection device in example.
In the air conditioning unit illustrative examples that the present invention provides, in coolant detection device
Detecting element 20 can at least include indoor set inlet pipe detector unit, indoor machine evaporation
(heat exchanger) degree of superheat detecting element, coolant circulating system low voltage value detecting element, off-premises station
Subcooler (heat exchanger) degree of supercooling detecting element and compressor air-discharging degree of superheat detecting element etc.,
One therein, or the most several combinations.
In the air conditioning unit illustrative examples that the present invention provides, irrigate the accurate of coolant quantity
Property be the setting of " owe fluorine run " Rule of judgment, and this Rule of judgment is in coolant circulating system system
Arrange under the conditions of cold operation, it may be assumed that the comparison judgment unit in coolant detection device, preset in it
Rule of judgment can at least include a kind of or the most several following combination:
Condition one: indoor set inlet pipe detector unit sets time detecting continuously and arrives: machine in start
Coil pipe inlet pipe temperature >=15～25 DEG C, then judge now to run as owing fluorine；
Condition two: coolant circulating system low voltage value detecting element sets time detecting continuously and arrives: coolant
The span of blood circulation low pressure correspondence saturation temperature Td≤T1, T1 can be-15 DEG C～
10 DEG C, then judge now as owing fluorine operation；
Condition three: cold degree detecting element sets time detecting continuously and arrives: coolant circulating system once mistake
The span of cold degree Tsc1≤T2, T2 can be 0～15 DEG C, and wherein degree of supercooling Tsc1 is
Coolant circulating system high-pressure value correspondence saturation temperature goes out with outdoor unit heat exchanger (condenser) liquid
The difference of temperature, then judge that now owing fluorine runs；
Condition four: cross for being provided with secondary in the coolant circulating system of cold heat exchanger, i.e. Fig. 2
Choke valve 10 crosses cooling system with subcooler 11 composition, and off-premises station subcooler (heat exchanger) is supercool
Degree detecting element sets time detecting continuously and arrives: coolant circulating system secondary degree of supercooling Tsc2≤T3,
The span of T3 can be 5 DEG C～25 DEG C, and wherein secondary degree of supercooling Tsc2 is coolant circulating system
High-pressure value correspondence saturation temperature and subcooler (condenser) liquid go out the difference of temperature, then judge
Now owe fluorine to run；
Condition five: compressor air-discharging degree of superheat detecting element sets time detecting continuously and arrives: air conditioner
The span organizing any one compressor discharge superheat Toh >=T4, T4 can be 0～20 DEG C,
Wherein, compressor air-discharging degree of superheat Toh is compressor exhaust temperature and coolant circulating system high pressure pressure
The difference of power correspondence saturation temperature, then judge that now owing fluorine runs.
In each condition above-mentioned, set the time can be the M second, the span of M can be 5～
60。
Above Rule of judgment is the relation of "or", uses the omnibearing condition setting of many condition, it is possible to
Accomplish accurately to judge the coolant situation of system as far as possible.
When coolant detection device is only set in air conditioning unit, it is possible to make air conditioning unit itself to have
Independently judge whether coolant circulating system lacks fluorine by above-mentioned Rule of judgment, the merit reminded the user that
Energy.
When cooling medium charging system is set in air conditioning unit, it is possible to make air conditioning unit itself have logical
Cross above-mentioned Rule of judgment and independently judge whether coolant circulating system lacks fluorine, the function reminded the user that,
And then after user connects cooling medium charging branch road, air conditioning unit can enter autonomous fill-up mode.
A cooling medium charging branch road is increased, as shown in Figure 2 in air conditioning unit low-pressure side.In difference
Under environmental working condition, air conditioning unit start runs refrigeration mode, according to the parameter of coolant circulating system (as
High pressure, low pressure, evaporator superheat, discharge superheat, subcooler degree of supercooling etc.) judge air-conditioning
Whether unit occurs that scarce coolant (owe fluorine) runs, so control the opening and closing of cooling medium charging valve 7 from
The dynamic groundwater increment controlling coolant.
As it is shown on figure 3, a specific embodiment application of the cooling medium charging system provided for the present invention
Carrying out the control flow schematic diagram of coolant automatic filling on air conditioning unit, this is air conditioning unit is carried out
The flow process of coolant automatic filling is:
After coolant storage tank and hand stop valve 9 connect, manual unlocking hand stop valve 9, air-conditioning
Unit enters the start of automatic filling pattern and runs, and as occurred, " owing fluorine to run " judges, then cooling medium charging
Valve 7 is opened, and coolant enters coolant circulating system by cooling medium charging branch road, and cooling medium charging valve 7 is opened
Close after opening the X second, after closing the Y second, again judge whether occur " owing fluorine to run ", in this way, cold
Matchmaker's pouring valve 7 is closed after being again turned on the X second, again judges, and so forth, directly after closing the Y second
After no longer occurring that " owing fluorine to judge " or automatic filling pattern total run time reach Z minute, coolant
Pouring valve 7 is closed, and air conditioning unit exits automatic filling pattern, and perfusion terminates.
The cooling medium charging system that the present invention provides is applied on the business air conditioner becoming coolant system, and it is main
Can solve the problem that following technical problem:
After air conditioning unit project installation, by this automatic filling function, air conditioning unit can from
Move the refrigerant super-addition amount needed for coolant circulating system that determines, after connecting coolant storage tank, automatically carry out
Cooling medium charging；
After after-sales service, by this automatic filling function, accurately judge coolant circulating system institute
Need cooling medium charging amount, and be automatically irrigated after connecting coolant storage tank；
In similar New Product Development Process, by this automatic filling function, primarily determine that air conditioning unit
Specified perfusion coolant quantity.
The present invention provide cooling medium charging system apply on air conditioning unit, mainly can produce below
The benefit of several aspects:
Project installation: cooling medium charging link can save part manual operation, such as: manually calculate
Coolant quantity, manually checks that the parameter of coolant circulating system judges coolant quantity etc., and this part can be saved
Labour cost, also avoids the waste that artificial incorrect operation causes simultaneously；
After-sales service: owing to the coolant quantity of coolant circulating system cannot determine, many past engineering is all
Be coolant is all discharged after the most again irrigate.Use automatic filling function, before air conditioning unit maintenance
Have only to carry out simple refrigerant recovering, after having keeped in repair, air conditioning unit can be with automatic decision coolant
Refrigerant super-addition amount needed for blood circulation, not only reduces coolant cost, but also alleviates ring
The pollution in border, can also be greatly shortened the downtime that maintenance causes simultaneously, accelerate maintenance engineering
Progress；
New product development: cross automatic filling function, during new product development can being greatly reduced, air-conditioning
It is time-consuming that unit coolant quantity mates, and accelerates new product development speed.
Finally should be noted that: above example only in order to technical scheme to be described and
Non-to its restriction；Although the present invention being described in detail with reference to preferred embodiment, affiliated
The those of ordinary skill in field is it is understood that still can enter the detailed description of the invention of the present invention
Row is revised or portion of techniques feature is carried out equivalent；Without deviating from technical solution of the present invention
Spirit, it all should be contained in the middle of the technical scheme scope that the present invention is claimed.
Claims (11)
1. a cooling medium charging system, it is characterised in that: include that coolant detection device and coolant fill
Dispensing device, described coolant detection device is for detecting the parameter of coolant circulating system, and judges inspection
Whether the parameter of the coolant circulating system measured reaches the Rule of judgment set, if reaching to set
Rule of judgment, then in coolant circulating system, irrigate coolant by described cooling medium charging device；
Described cooling medium charging device includes that the cooling medium charging being connected on coolant circulating system for side props up
Road, the input of described cooling medium charging branch road connects coolant storage tank, described cooling medium charging branch road
On be provided with cooling medium charging valve (7)；
Described coolant detection device includes detecting element (20) and multilevel iudge element (21),
Described detecting element (20) electrically connects described multilevel iudge element (21), described detecting element
(20) for detecting the parameter of coolant circulating system, and the parameter detected is sent to described
Multilevel iudge element (21), described multilevel iudge element (21) is by the parameter received and its
The parameter that portion presets compares, and when reaching default Rule of judgment, sends signal, shows
Need to irrigate coolant；
Described cooling medium charging system also includes that controller (22), described controller (22) are electrically connected
Connect described multilevel iudge element (21) and described cooling medium charging valve (7), when described controller (22)
After receiving the signal needing to irrigate coolant that described multilevel iudge element (21) sends, control
Described cooling medium charging valve (7) is opened, and irrigates coolant；
Described controller (22) presets the first setting time and the second setting time；
Institute is reached when described controller (22) controls the time that described cooling medium charging valve (7) opens
When stating for the first setting time, described controller (22) controls described cooling medium charging valve (7) and cuts out；
When the time that described cooling medium charging valve (7) is closed reaches the described second setting time, institute
State controller (22) and check whether that needing of receiving that described multilevel iudge element (21) sends fills
The signal of note coolant；If receiving signal, described controller (22) controls described cooling medium charging
Valve (7) is opened.
2. cooling medium charging system as claimed in claim 1, it is characterised in that: flow along coolant
Direction, on described cooling medium charging branch road, the rear of described cooling medium charging valve (7) is provided with coolant
Speed regulator.
3. cooling medium charging system as claimed in claim 2, it is characterised in that: described coolant is adjusted
Speed device is capillary tube (6) or choke valve.
4. cooling medium charging system as claimed in claim 1, it is characterised in that: flow along coolant
Direction, on described cooling medium charging branch road, the front of described cooling medium charging valve (7) is provided with filtration
Device (8).
5. cooling medium charging system as claimed in claim 1, it is characterised in that: near described cold
Matchmaker irrigates the position that branch road connects with described coolant storage tank and is additionally provided with hand stop valve (9).
6. cooling medium charging system as claimed in claim 1, it is characterised in that: described coolant is examined
Survey device and also include display element (23), and/or, alarm element (24), described display unit
Part (23) and/or described alarm element (24) electrically connect described multilevel iudge element (21).
7. cooling medium charging system as claimed in claim 1, it is characterised in that: described controller
(22) it was additionally provided with for the 3rd setting time in, when coolant circulating system carries out the total of cooling medium charging
When time reaches the described 3rd setting time, described controller (22) controls described cooling medium charging
Valve (7) cuts out.
8. a cooling medium charging based on the cooling medium charging system described in any one of claim 1-7
Method, it is characterised in that comprise the steps:
By the parameter of coolant detection device detection coolant circulating system, when the coolant detected follows
When the parameter of loop systems reaches the Rule of judgment set, by cooling medium charging device to refrigerant circulation
System irrigates coolant；
Specifically use following steps:
S1) refrigerant circulation system is detected by the detecting element (20) in described coolant detection device
The parameter of system, and the parameter detected is sent to the multilevel iudge in described coolant detection device
Element (21), described multilevel iudge element (21) is by the parameter received and its internal preset
Parameter compares, and when reaching default Rule of judgment, sends the signal of perfusion coolant to control
Device processed (22)；
S2) the cooling medium charging valve (7) during described controller (22) controls described cooling medium charging device
Open, irrigate coolant；
S3) time opened when described cooling medium charging valve (7) reaches in described controller (22)
First setting the time time, described controller (22) control described cooling medium charging valve (7) close；
S4) time closed when described cooling medium charging valve (7) reaches in described controller (22)
Second setting the time time, described controller (22) check whether receive described multilevel iudge unit
What part (21) sent needs to irrigate the signal of coolant, as received signal, returns step S2),
As confiscated signal, cooling medium charging terminates.
9. one kind air conditioning unit, it is characterised in that: include as described in any one of claim 1-7
Cooling medium charging system.
It is the most air conditioning unit, it is characterised in that: described coolant detection dress
Detecting element (20) in putting includes indoor set inlet pipe detector unit, indoor machine evaporation
Degree of superheat detecting element, coolant circulating system low voltage value detecting element, off-premises station subcooler are supercool
One in degree detecting element and compressor air-discharging degree of superheat detecting element, or several combinations.
11. is the most air conditioning unit, it is characterised in that: described coolant detects
Comparison judgment unit in device, Rule of judgment preset in it includes following one or more
Combination:
Set time detecting continuously to arrive: interior machine coil pipe inlet pipe temperature >=15 of start～25 DEG C；
Set time detecting continuously to arrive: coolant circulating system low pressure correspondence saturation temperature Td≤T1,
The span of T1 is-15 DEG C～10 DEG C；
Set time detecting continuously to arrive: degree of supercooling Tsc1≤T2 of coolant circulating system, T2 takes
Value scope is 0～15 DEG C；
Set time detecting continuously to arrive: coolant circulating system secondary degree of supercooling Tsc2≤T3, T3 takes
Value scope is 5 DEG C～25 DEG C；
Set time detecting continuously to arrive: air conditioning unit any one compressor discharge superheat
The span of Toh >=T4, T4 is 0～20 DEG C.
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| CN201510039334.4A CN104534752B (en) | 2015-01-26 | 2015-01-26 | Refrigerant filling system and method and air conditioning unit |
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| CN107726534A (en) * | 2017-10-24 | 2018-02-23 | 广东美的暖通设备有限公司 | Air conditioner heat pump system and its coolant injection control method, device |
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