CN105066354B - The control method and control device of air-conditioning system - Google Patents
The control method and control device of air-conditioning system Download PDFInfo
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- CN105066354B CN105066354B CN201510486632.8A CN201510486632A CN105066354B CN 105066354 B CN105066354 B CN 105066354B CN 201510486632 A CN201510486632 A CN 201510486632A CN 105066354 B CN105066354 B CN 105066354B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of control method of air-conditioning system, comprise the following steps：After the air-conditioning system enters heating mode, the middle portion temperature T2 of indoor heat exchanger and the temperature Tb of compressor are detected, and calculates the temperature Tb of the compressor and middle portion temperature T2 of indoor heat exchanger difference △ T=Tb T2；When the air-conditioning system meets into the condition of defrosting mode, judge whether △ T are more than preset temperature threshold value；If it is determined that △ T are less than or equal to the preset temperature threshold value, then by adjust the air-conditioning system operational factor so that the △ T be more than the preset temperature threshold value after start timing, and control the air-conditioning system to enter the defrosting mode when timing time is more than preset time, refrigerant circulation during ensuring that the air-conditioning system is defrosted.The control method of the air-conditioning system can solve the problem that air-conditioning system defrosting during refrigerant circulation it is too small the problem of, ensure air-conditioning system normally defrost.The invention also discloses a kind of control device of air-conditioning system.
Description
Technical field
The present invention relates to air-conditioning technical field, the control method of more particularly to a kind of air-conditioning system and a kind of air-conditioning system
Control device.
Background technology
The air-conditioning refrigerant selected at present need to consider the influence to atmospheric ozone layer and global warming, such as R290 simultaneously
The carbon-hydrogen refrigerant HCs such as (propane), R1270 (propylene) are 0 to depletion of the ozone layer coefficient, and greenhouse coefficient is smaller, and thermal performance is excellent
It is good, it is the desirable material that refrigerant R410A, R22 are substituted for a long time, but this carbon-hydrogen refrigerant HCs charging amounts are few, with mineral oil phase
Dissolubility is again very good, so as to it sometimes appear that refrigerant circulation is too small, cause air-conditioning system normal during defrosting
Work.And if higher from the poor oil of intermiscibility (such as PAG oil) price, so as to considerably increase cost.
The content of the invention
The application is that understanding and the research of problems with are made based on inventor：
When from refrigerant as air-conditioning system of R290 (propane), the carbon-hydrogen refrigerant HCs such as R1270 (propylene), if
Compressor over-heat at the bottom degree is smaller (such as 2 DEG C or so), and compression motor spindle coolant quantity is almost more than 2 times of oil mass, while air-conditioning
Inherently (some systems even charging amount only has 30% left side of same capabilities efficiency R22 systems to coolant injection amount in system less
It is right) coolant quantity in outdoor heat exchanger (condenser) can be caused to reduce amplitude be sometime up to more than 60%, at this moment air-conditioning system is such as
Fruit is defrosted, condenser without degree of supercooling, into throttle part be gaseous state and it is non-liquid, when the refrigerant for entering throttle part contains
Have a gaseous coolant and the specific volume of gaseous coolant bigger than the specific volume of liquid refrigerants (R290 saturated gas specific volumes are saturated solutions at such as 20 DEG C
27 times of body), so as to cause the throttling performance degradation of throttle part, air-conditioning system can not normally defrost.
It is contemplated that at least solves one of technical problem in above-mentioned technology to a certain extent.Therefore, the present invention
One purpose is to propose a kind of control method of air-conditioning system, can solve the problem that refrigerant circulation mistake during air-conditioning system defrosting
The problem of small, ensure that air-conditioning system normally defrosts.
It is another object of the present invention to propose a kind of control device of air-conditioning system.
To reach above-mentioned purpose, a kind of control method for air-conditioning system that one aspect of the present invention embodiment proposes, its feature
It is, comprises the following steps：After the air-conditioning system enters heating mode, the middle portion temperature T2 and pressure of indoor heat exchanger are detected
The temperature Tb of contracting machine, and calculate the temperature Tb of the compressor and the middle portion temperature T2 of the indoor heat exchanger difference △ T=Tb-
T2；When the air-conditioning system meets into the condition of defrosting mode, judge whether △ T are more than preset temperature threshold value；If sentence
Disconnected △ T are less than or equal to the preset temperature threshold value, then by adjusting the operational factor of the air-conditioning system so that the △ T are big
Start timing after the preset temperature threshold value, and control the air-conditioning system to enter institute when timing time is more than preset time
Defrosting mode is stated, refrigerant circulation during ensuring that the air-conditioning system is defrosted.
The control method of air-conditioning system according to embodiments of the present invention, cuts in air-conditioning system from heating mode to defrosting mode
When changing, do not switch over directly, but by judging the temperature Tb of compressor and the middle portion temperature T2 of indoor heat exchanger difference
△ T carry out suitable time-delay and just switched over again after being more than preset temperature threshold value, i.e., in △ T more than starting to count after preset temperature threshold value
When, until timing time just controls air-conditioning system to enter defrosting mode after being more than preset time, so as to solve air-conditioning system
The problem of refrigerant circulation is too small during defrosting, ensure that air-conditioning system normally defrosts so that the reliable and stable operation of air-conditioning system.
According to one embodiment of present invention, if it is determined that △ T are more than the preset temperature threshold value, then directly start to count
When.
According to one embodiment of present invention, the operational factor of the air-conditioning system is adjusted, is specifically included：Turn restriction down
The aperture of part；Or heighten the running speed of compressor；Or heighten the air-out volume of indoor fan；Or heighten outdoor fan
Air-out volume.
Wherein, the refrigerant in the air-conditioning system is carbon-hydrogen refrigerant HCs.
According to one embodiment of present invention, the temperature Tb of the compressor is the bottom temp or described of the compressor
The side temperature of compressor.
To reach above-mentioned purpose, a kind of control device for air-conditioning system that another aspect of the present invention embodiment proposes, including：
First temperature detecting module, for detecting the middle portion temperature T2 of indoor heat exchanger after the air-conditioning system enters heating mode；
Second temperature detection module, for detecting the temperature Tb of compressor after the air-conditioning system enters heating mode；Timer；Control
Molding block, for calculating the temperature Tb of the compressor and the middle portion temperature T2 of the indoor heat exchanger difference △ T=Tb-T2,
And judge whether △ T are more than preset temperature threshold value when the air-conditioning system meets into the condition of defrosting mode, wherein, if
Judge that △ T are less than or equal to the preset temperature threshold value, operation of the control module then by adjusting the air-conditioning system is joined
Number is so that the timer starts timing after the △ T are more than the preset temperature threshold value, and when timing time is more than default
Between when control the air-conditioning system to enter the defrosting mode, refrigerant circulation during ensuring that the air-conditioning system is defrosted
Amount.
The control device of air-conditioning system according to embodiments of the present invention, cuts in air-conditioning system from heating mode to defrosting mode
When changing, directly control air-conditioning system does not switch over control module, but by judging that the temperature Tb of compressor changes with interior
The middle portion temperature T2 of hot device difference △ T carry out suitable time-delay and just control air-conditioning system to be cut again after being more than preset temperature threshold value
Change, i.e., timer starts timing after △ T are more than preset temperature threshold value, until timing time is more than control module after preset time
Just control air-conditioning system enters defrosting mode, and so as to solve, refrigerant circulation is too small asks during air-conditioning system defrosts
Topic, ensure that air-conditioning system normally defrosts so that the reliable and stable operation of air-conditioning system.
According to one embodiment of present invention, if it is determined that △ T are more than the preset temperature threshold value, the timer is then straight
Connect beginning timing.
According to one embodiment of present invention, the control module especially by the aperture for turning throttle part down or is heightened
The running speed of compressor either heightens the air-out volume of indoor fan or the air-out volume for heightening outdoor fan so that described
△ T are more than the preset temperature threshold value.
Wherein, the refrigerant in the air-conditioning system is carbon-hydrogen refrigerant HCs.
According to one embodiment of present invention, the temperature Tb of the compressor is the bottom temp or described of the compressor
The side temperature of compressor.
Brief description of the drawings
Fig. 1 is the flow chart according to the control method of the air-conditioning system of the embodiment of the present invention；
Fig. 2 is the flow chart according to the control method of the air-conditioning system of a specific embodiment of the invention；And
Fig. 3 is the block diagram according to the control device of the air-conditioning system of the embodiment of the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
The control method and air-conditioning system of the air-conditioning system that it is proposed according to embodiments of the present invention described with reference to the accompanying drawings
Control device.
Fig. 1 be according to the flow chart of the control method of the air-conditioning system of the embodiment of the present invention, wherein, the embodiment of the present invention
Air-conditioning system includes outdoor heat exchanger, indoor heat exchanger, compressor, throttle part such as electric expansion valve, indoor fan, outdoor
The parts such as blower fan, are just no longer described in detail here.
As shown in figure 1, the control method of the air-conditioning system comprises the following steps：
S1, after air-conditioning system enters heating mode, detect the middle portion temperature T2 of indoor heat exchanger and the temperature of compressor
Tb, and calculate the temperature Tb of compressor and the middle portion temperature T2 of indoor heat exchanger difference △ T=Tb-T2.
Wherein, the temperature Tb of compressor can be the bottom temp of compressor or the side temperature of compressor.Say, measure
The position of compressor temperature can be the bottom of compressor or the side of the lower house of compressor or compressor.
S2, when air-conditioning system meets into the condition of defrosting mode, judge whether △ T are more than preset temperature threshold value.
Wherein, preset temperature threshold value t can be 0~20 DEG C.Also, when the temperature Tb of compressor is by measuring compressor
Bottom position temperature when obtaining, t can be 5 DEG C；When the temperature Tb of compressor is the lateral location temperature by measuring compressor
When degree obtains, t can be 8 DEG C.
S3, if it is determined that △ T are less than or equal to preset temperature threshold value, then by adjust air-conditioning system operational factor so that
△ T start timing after being more than the preset temperature threshold value, and control air-conditioning system to enter when timing time is more than preset time
Defrosting mode, refrigerant circulation during ensuring that air-conditioning system is defrosted.
Wherein, preset time can be n minutes, and n span is 1~10 minute, it is preferable that n can be 3 minutes.
According to one embodiment of present invention, when the air-conditioning system meets into the condition of defrosting mode, if sentenced
Disconnected △ T are more than preset temperature threshold value t, then directly start timing, and air-conditioning system is then controlled when timing time is more than preset time
System enters defrosting mode, refrigerant circulation during ensuring that air-conditioning system is defrosted.
Specifically, according to one embodiment of present invention, as shown in Fig. 2 the control method of above-mentioned air-conditioning system includes
Following steps：
S201, air-conditioning system are run with heating mode.
S202, detection indoor heat exchanger is the middle portion temperature T2 of evaporator, and detects the temperature Tb of compressor, calculates △ T
=Tb-T2.
S203, when air-conditioning system meets into the condition of defrosting mode, (air-conditioning system works according to present mode, directly
To the condition met into defrosting mode), judge △ T now.If △ T are more than such as 5 DEG C of preset temperature threshold value t, hold
Row step S205；If △ T are less than or equal to such as 5 DEG C of preset temperature threshold value t, step S204 is performed.
S204, the operational factor of air-conditioning system is adjusted so that △ T are more than preset temperature threshold value t, then perform step S205.
Wherein, the operational factor of the air-conditioning system is adjusted, is specifically included：Turn throttle part such as electric expansion valve down
Aperture；Or heighten the running speed of compressor；Or heighten the air-out volume of indoor fan；Or heighten going out for outdoor fan
Wind air quantity.
S205, start timing.
S206, when timing time is more than preset time such as 3 minutes, control air-conditioning system enters defrosting mode.
Wherein, after air-conditioning system defrosting terminates, when reentering heating mode, above-mentioned steps are repeated.
In an embodiment of the present invention, the refrigerant in air-conditioning system can be carbon-hydrogen refrigerant HCs, so as to which the present invention is implemented
The control method of the air-conditioning system of example can solve the problem that the problem of refrigerant circulation is too small during air-conditioning system defrosting, therefore can be with
More cheap ore deposit is used when air-conditioning system is using carbon-hydrogen refrigerant HCs such as propane refrigerant R290, propylene refrigeration agent R1270
Thing oil, reduces cost.
In summary, the control method of air-conditioning system according to embodiments of the present invention, air-conditioning system from heating mode to
When defrosting mode switches, do not switch over directly, but by judging temperature Tb and the middle part of indoor heat exchanger of compressor
Temperature T2 difference △ T carry out suitable time-delay and just switched over again after being more than preset temperature threshold value, i.e., are more than preset temperature threshold in △ T
Start timing after value, until timing time just controls air-conditioning system to enter defrosting mode after being more than preset time, so as to solve
The problem of certainly refrigerant circulation is too small during air-conditioning system defrosting, ensures that air-conditioning system normally defrosts so that air-conditioning system is steady
Determine reliability service, and can be in air-conditioning system using carbon-hydrogen refrigerants such as propane refrigerant R290, propylene refrigeration agent R1270
Using more cheap mineral oil during HCs, cost is reduced.
Fig. 3 be according to the block diagram of the control device of the air-conditioning systems of embodiments of the invention, wherein, the air-conditioning system
System includes outdoor heat exchanger, indoor heat exchanger, compressor, throttle part such as electric expansion valve, indoor fan, outdoor fan
Part, just no longer it is described in detail here.As shown in figure 3, the control device of the air-conditioning system include the first temperature detecting module 11,
Second temperature detection module 12, timer 20 and control module 30.
Wherein, the first temperature detecting module 11 is used to detect indoor heat exchanger after the air-conditioning system enters heating mode
Middle portion temperature T2, second temperature detection module 12 be used for the air-conditioning system enter heating mode after detect compressor temperature
Spend Tb.
According to one embodiment of present invention, the temperature Tb of compressor is bottom temp or the side of compressor of compressor
Temperature.Say, the position for measuring compressor temperature can be the bottom of compressor or the lower house of compressor or pressure
The side of contracting machine.
In an embodiment of the present invention, control module 30 is used for temperature Tb and the middle part of indoor heat exchanger for calculating compressor
Temperature T2 difference △ T=Tb-T2, and judge whether △ T are more than when air-conditioning system meets into the condition of defrosting mode and preset
Temperature threshold, wherein, if it is determined that △ T are less than or equal to preset temperature threshold value t, control module 30 is then by adjusting air-conditioning system
Operational factor so that timer 20 starts timing after △ T are more than preset temperature threshold value t, and be more than preset time in timing time
Such as control air-conditioning system to enter defrosting mode during n minutes, refrigerant circulation during ensuring that air-conditioning system is defrosted.Its
In, timer 20 can be integrated in control module 30.
Also, if it is determined that △ T are more than preset temperature threshold value t, timer 20 then directly starts timing, then in timing
Between when being more than preset time control module control air-conditioning system enter defrosting mode, it is cold during ensuring that air-conditioning system is defrosted
Matchmaker's internal circulating load.
Specifically, preset temperature threshold value t can be 0~20 DEG C.Wherein, when the temperature Tb of compressor is compressed by measuring
When the bottom position temperature of machine obtains, t can be 5 DEG C；When the temperature Tb of compressor is the lateral location by measuring compressor
When temperature obtains, t can be 8 DEG C.
Specifically, according to one embodiment of present invention, n span is 1~10 minute, it is preferable that n can be 3
Minute.
According to one embodiment of present invention, control module 30 specifically can be by turning throttle part such as electric expansion valve down
Aperture either heighten the running speed of compressor or the air-out volume for heightening indoor fan or heighten going out for outdoor fan
Wind air quantity is so that △ T are more than preset temperature threshold value t.
In an embodiment of the present invention, the refrigerant in air-conditioning system can be carbon-hydrogen refrigerant HCs, so as to which the present invention is implemented
The control device of the air-conditioning system of example can solve the problem that the problem of refrigerant circulation is too small during air-conditioning system defrosting, therefore can be with
More cheap ore deposit is used when air-conditioning system is using carbon-hydrogen refrigerant HCs such as propane refrigerant R290, propylene refrigeration agent R1270
Thing oil, reduces cost.
The control device of air-conditioning system according to embodiments of the present invention, cuts in air-conditioning system from heating mode to defrosting mode
When changing, directly control air-conditioning system does not switch over control module, but by judging that the temperature Tb of compressor changes with interior
The middle portion temperature T2 of hot device difference △ T carry out suitable time-delay and just control air-conditioning system to be cut again after being more than preset temperature threshold value
Change, i.e., timer starts timing after △ T are more than preset temperature threshold value, until timing time is more than control module after preset time
Just control air-conditioning system enters defrosting mode, and so as to solve, refrigerant circulation is too small asks during air-conditioning system defrosts
Topic, ensure that air-conditioning system normally defrosts so that the reliable and stable operation of air-conditioning system, and propane system can be used in air-conditioning system
Using more cheap mineral oil during the carbon-hydrogen refrigerant HCs such as cryogen R290, propylene refrigeration agent R1270, cost is reduced.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, limited unless otherwise clear and definite.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (8)
1. a kind of control method of air-conditioning system, it is characterised in that comprise the following steps：
After the air-conditioning system enters heating mode, the middle portion temperature T2 of indoor heat exchanger and the temperature Tb of compressor are detected,
And the temperature Tb of the compressor and the middle portion temperature T2 of the indoor heat exchanger difference △ T=Tb-T2 are calculated, wherein, it is described
The temperature Tb of compressor is the bottom temp of the compressor or the side temperature of the compressor；
When the air-conditioning system meets into the condition of defrosting mode, judge whether △ T are more than preset temperature threshold value；
If it is determined that △ T are less than or equal to the preset temperature threshold value, then by adjust the operational factor of the air-conditioning system with
The △ T is started timing after being more than the preset temperature threshold value, and the sky is controlled when timing time is more than preset time
Adjusting system enters the defrosting mode, refrigerant circulation during ensuring that the air-conditioning system is defrosted.
2. the control method of air-conditioning system as claimed in claim 1, it is characterised in that if it is determined that △ T are more than described preset
Temperature threshold, then directly start timing.
3. the control method of air-conditioning system as claimed in claim 1, it is characterised in that adjust the operation ginseng of the air-conditioning system
Number, is specifically included：
Turn the aperture of throttle part down；Or
Heighten the running speed of compressor；Or
Heighten the air-out volume of indoor fan；Or
Heighten the air-out volume of outdoor fan.
4. the control method of the air-conditioning system as any one of claim 1-3, it is characterised in that in the air-conditioning system
Refrigerant be carbon-hydrogen refrigerant HCs.
A kind of 5. control device of air-conditioning system, it is characterised in that including：
First temperature detecting module, for detecting the middle portion temperature of indoor heat exchanger after the air-conditioning system enters heating mode
T2；
Second temperature detection module, for detecting the temperature Tb of compressor after the air-conditioning system enters heating mode, wherein,
The temperature Tb of the compressor is the bottom temp of the compressor or the side temperature of the compressor；
Timer；
Control module, for calculating the temperature Tb of the compressor and the middle portion temperature T2 of the indoor heat exchanger difference △ T=
Tb-T2, and judge whether △ T are more than preset temperature threshold value when the air-conditioning system meets into the condition of defrosting mode, its
In,
If it is determined that △ T are less than or equal to the preset temperature threshold value, the control module is then by adjusting the air-conditioning system
Operational factor so that the timer starts timing after the △ T are more than the preset temperature threshold value, it is and big in timing time
The air-conditioning system is controlled to enter the defrosting mode when preset time, it is cold during ensuring that the air-conditioning system is defrosted
Matchmaker's internal circulating load.
6. the control device of air-conditioning system as claimed in claim 5, it is characterised in that if it is determined that △ T are more than described preset
Temperature threshold, the timer then directly start timing.
7. the control device of air-conditioning system as claimed in claim 5, it is characterised in that the control module is especially by turning down
The aperture of throttle part either heightens the running speed of compressor or the air-out volume for heightening indoor fan or heightens outdoor
The air-out volume of blower fan is so that the △ T are more than the preset temperature threshold value.
8. the control device of the air-conditioning system as any one of claim 5-7, it is characterised in that in the air-conditioning system
Refrigerant be carbon-hydrogen refrigerant HCs.
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| CN106091235B (en) * | 2016-05-31 | 2019-08-27 | 广东美的暖通设备有限公司 | The control method and air-conditioner control system of air-conditioning system |
| CN108361917A (en) * | 2018-02-14 | 2018-08-03 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
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| CN104154630A (en) * | 2014-07-22 | 2014-11-19 | 美的集团武汉制冷设备有限公司 | Air conditioning system control method and control device |
| WO2015045150A1 (en) * | 2013-09-30 | 2015-04-02 | 三菱電機株式会社 | Air conditioner operation method |
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| KR100234080B1 (en) * | 1997-08-29 | 2000-01-15 | 윤종용 | Air conditioner and defrosting method in heating mode therefor |
| JP2011257098A (en) * | 2010-06-11 | 2011-12-22 | Fujitsu General Ltd | Heat pump cycle device |
| CN103512152A (en) * | 2013-05-31 | 2014-01-15 | 广东美芝精密制造有限公司 | Air conditioning system and refrigerant quantity control method used for air conditioning system |
| WO2015045150A1 (en) * | 2013-09-30 | 2015-04-02 | 三菱電機株式会社 | Air conditioner operation method |
| CN104110792A (en) * | 2014-05-30 | 2014-10-22 | 美的集团股份有限公司 | Control method and device for air conditioning system |
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