CN108072214A - Air-conditioning device and its control method - Google Patents
Air-conditioning device and its control method Download PDFInfo
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- CN108072214A CN108072214A CN201711038551.7A CN201711038551A CN108072214A CN 108072214 A CN108072214 A CN 108072214A CN 201711038551 A CN201711038551 A CN 201711038551A CN 108072214 A CN108072214 A CN 108072214A
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- temperature
- heat exchanger
- air
- conditioning device
- outdoor
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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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/029—Control issues
- F25B2313/0293—Control issues related to the indoor fan, e.g. controlling speed
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to air-conditioning device and its control methods.Air-conditioning device includes compressor, four-way valve, indoor heat exchanger, double-tube heat exchanger, expansion valve and outdoor heat exchanger.The control method of the present invention includes：When air-conditioning device heating operation to outdoor heat exchanger needs defrosting, the outdoor environment temperature residing for air-conditioning device is judged whether in the range of preset temperature section, if so, starting fair current defrosting mode；If it is not, then start adverse current defrosting mode；And under fair current defrosting mode, the state for keeping four-way valve is constant, promotes expansion valve standard-sized sheet；Under adverse current defrosting mode, switch the state of four-way valve, to promote the refrigerant flow direction when refrigerant in air-conditioning device is flowed to air-conditioning device heating operation or in fair current defrosting mode opposite.Thereby, it is possible to make full use of two kinds of respective advantages of defrosting mode, the purpose for optimizing the effect of the various aspects such as the comfortable sexual experience of defrosting time, defrosting efficiency, defrosting effect and user during low-temperature heating is realized.
Description
Technical field
The present invention relates to common electric, more particularly to a kind of air-conditioning device and its control method.
Background technology
In the case of low temperature and high humidity, if air-conditioning device with heating mode long-play, the vapor in air
It will be condensed on the surface of outdoor heat exchanger and freeze or directly sublimate into hoar crystal.Over time, hoar crystal can be increasingly
Thickness, so as to which the cross-ventilation of outdoor heat exchanger be hindered to exchange heat, the surface temperature for causing outdoor heat exchanger is lower, and heat transfer effect is disliked
Change, heating capacity is decayed rapidly.It just needs to carry out defrost to outdoor heat exchanger at this time.
Conventional air-conditioning defrost is that adverse current forces defrosting and thermal storage defrosting two ways.Thermal storage defrosting mainly utilizes accumulation of heat
Material collects the waste heat of compressor housing, and in defrosting, the high temperature refrigerant after being exchanged heat using refrigerant with its waste heat is entered outdoor and changed
Hot device defrost.But because of the thermal Finite that heat-storing material is collected, shortage of heat needed for defrosting is assisted furthermore with bypass high-temperature exhaust air
The mode of defrosting can cause system complex, therefore this mode fails to be widely used.It is to pass through four-way to force adverse current defrosting
Valve commutates, and refrigerant adverse current, high temperature refrigerant is directly entered outdoor heat exchanger and carries out pressure defrost.And this forces adverse current defrost process bag
Containing the compressor stand-by period that start-stop, four-way valve commutate twice, system pressure balances twice and exit the cold wind protection of defrosting rear defence
Time etc. causes entire defrost process duration longer.Also, during above-mentioned defrost, the indoor fan of air-conditioning is in
Halted state causes indoor refrigerant temperature relatively low, and the increased refrigeration duty of defrost and wall refrigeration duty cause indoor temperature drastically
Decline, fluctuations in indoor temperature is larger, and then people is caused to feel the problem of comfort is poor.
The content of the invention
One purpose of first aspect present invention is intended to overcome at least one defect of the prior art, and providing one kind can
The control method of the air-conditioning device of Defrost mode is reasonably selected according to outdoor environment, to realize that effect optimizes.
Indoor temperature generates larger fluctuation during the further purpose of one of first aspect present invention avoids defrost.
First aspect present invention another further objective is that shorten air-conditioning device defrost process it is lasting when
Between, reduce operation noise, improve system run all right.
The purpose of second aspect of the present invention is to provide a kind of air-conditioning device.
According to the first aspect of the invention, the present invention provides a kind of control method of air-conditioning device, the air-conditioning device bag
Compressor, four-way valve, indoor heat exchanger, double-tube heat exchanger, expansion valve and outdoor heat exchanger are included, heats and transports in the air-conditioning device
During row described sleeve pipe heat exchanger wherein one layer of pipeline connects the refrigerant exit of the indoor heat exchanger respectively and the outdoor is changed
The refrigerant inlet of hot device, another layer of pipeline of described sleeve pipe heat exchanger connect refrigerant exit and the institute of the outdoor heat exchanger respectively
The refrigerant inlet of compressor is stated, the control method includes：
When the air-conditioning device heating operation to the outdoor heat exchanger needs defrosting, judge residing for the air-conditioning device
Outdoor environment temperature whether in the range of the preset temperature section, if so, starting fair current defrosting mode；If it is not, it then opens
Dynamic adverse current defrosting mode；And
Under the fair current defrosting mode, the state for keeping the four-way valve is constant, promotes the expansion valve standard-sized sheet；Institute
It states under adverse current defrosting mode, switches the state of the four-way valve, the refrigerant in the air-conditioning device to be promoted to flow to and the sky
Adjust device heating operation or refrigerant flow direction during in fair current defrosting mode opposite.
Optionally, under the fair current defrosting mode, the compressor is run with the highest frequency allowed.
Optionally, the fair current defrosting mode includes：Judge whether the coil temperature of the indoor heat exchanger is more than or equal to
First preset temperature, if so, starting the indoor fan of the air-conditioning device；If it is not, then stop the operation of the indoor fan,
And heating is carried out to the coil pipe of the indoor heat exchanger after its coil temperature meets or exceeds first preset temperature, then
Start the indoor fan.
Optionally, starting the operation of the indoor fan includes：
Temperature range according to residing for the leaving air temp of the air-conditioning device controls the rotating speed of the indoor fan, so that
The leaving air temp is higher, and the rotating speed of the indoor fan is bigger.
Optionally, the temperature range residing for the leaving air temp includes (0, t1)、[t1, t2)、[t2, t3) and [t3, ∞) and four
A temperature range, wherein, t3>t2>t1；And
When the temperature range residing for the leaving air temp of the air-conditioning device is respectively (0, t1)、[t1, t2)、[t2, t3) and
[t3, ∞) when, the indoor fan is respectively with D1、D2、D3And D4Rotating speed operation, wherein D4>D3>D2>D1。
Optionally, turning for the indoor fan is controlled in the temperature range residing for the leaving air temp according to the air-conditioning device
Before speed, the control method further includes：Periodically obtain the leaving air temp of the air-conditioning device；Wherein
The time cycle of the leaving air temp of the air-conditioning device is obtained as any length of time value in 4~6S.
Optionally, after the indoor fan is started, the control method further includes：
When the coil temperature of the outdoor heat exchanger reaches the second preset temperature and maintains the second preset duration or described
The coil temperature of outdoor heat exchanger reaches the 3rd preset temperature and maintains fair current defrosting mode described in the 3rd preset duration backed off after random；
Wherein
Second preset temperature is less than the 3rd preset temperature, and it is default that second preset duration is more than the described 3rd
Duration.
Optionally, the preset temperature section includes (0, ∞) and (- ∞, t4) two temperature subintervals, wherein, t4It is less than
Zero；
The fair current defrosting modular further includes：
When the outdoor environment temperature is in the range of the temperature subinterval of (0, ∞), start the room of the air-conditioning device
Outer wind turbine；When the outdoor environment temperature is in (- ∞, t4) temperature subinterval in the range of when, stop the outdoor fan
Operation.
Optionally, when the coil temperature of the outdoor heat exchanger reach the 4th preset temperature and maintain the 4th preset duration,
Or the coil temperature of the outdoor heat exchanger reaches the 5th preset temperature and the 5th preset duration backed off after random adverse current is maintained to defrost
Pattern；Wherein
4th preset temperature is less than the 5th preset temperature, and it is default that the 4th preset duration is more than the described 5th
Duration.
Optionally, the control method further includes：
Defrosting anticipation step：Periodically obtain the outdoor environment temperature residing for the air-conditioning device and the outdoor heat exchange
The coil temperature of device；
Solidifying dew-point temperature is calculated according to the outdoor environment temperature；
When the coil temperature of the outdoor heat exchanger continues first less than or equal to the time of the solidifying dew-point temperature to be preset
Then judge that the outdoor heat exchanger needs to defrost when long.
Optionally, the solidifying dew-point temperature is calculated according to the following formula：Tes=C*Tao-a, wherein, Tes is condensation point temperature
Degree, Tao are outdoor environment temperature, and C and a are constant.
According to the second aspect of the invention, the present invention provides a kind of air-conditioning device, is changed including compressor, four-way valve, interior
Hot device, double-tube heat exchanger, expansion valve and outdoor heat exchanger, in the air-conditioning device heating operation described sleeve pipe heat exchanger its
In one layer of pipeline connect the refrigerant exit of the indoor heat exchanger and the refrigerant inlet of the outdoor heat exchanger, described sleeve pipe respectively
Another layer of pipeline of heat exchanger connects the refrigerant exit of the outdoor heat exchanger and the refrigerant inlet of the compressor respectively, wherein
The air-conditioning device is configured to run under the control of any of the above-described control method.
The control method of the present invention is selectively defrosted according to the difference of outdoor environment temperature using the fair current of refrigerant fair current
The adverse current defrosting mode of pattern or refrigerant adverse current can make full use of two kinds of respective advantages of defrosting mode, realize in low temperature system
It is in thermal process that the effect of the various aspects such as the comfortable sexual experience of defrosting time, defrosting efficiency, defrosting effect and user is optimal
The purpose of change.
Further, under fair current defrosting mode, according to the coil temperature of indoor heat exchanger to the operating of indoor fan into
Row especially control so that start indoor fan, the coil pipe temperature of indoor heat exchanger when the coil temperature of indoor heat exchanger is higher immediately
When spending relatively low, restart indoor fan after first being heated to coil pipe.Thus, it is ensured that temperature can be all blown out in the case of whatsoever
The suitable and stronger warm wind of comfort is spent, avoiding indoor fan stopping during existing adverse current forces defrosting causes indoor temperature
Fluctuate it is larger and the technical issues of cause comfort poor.
Further, under fair current defrosting mode, compressor need not stop, and the state of four-way valve need not switch, section
Four-way valve commutation, system refrigerant balance stand-by period have been saved, has shortened the defrost process duration of air-conditioning device.Together
When, fair current defrosting mode does not have four-way valve commutation, compressor shutdown and noise problem caused by compressor low-frequency operation, and also
The problem of system pressure caused by avoiding four-way valve switching direction is larger improves the stability of system operation.
According to the accompanying drawings to the detailed description of the specific embodiment of the invention, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Description of the drawings
Some specific embodiments of detailed description of the present invention by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter.
Identical reference numeral denotes same or similar component or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached drawing：
Fig. 1 is the schematic structure schematic diagram of air-conditioning device according to an embodiment of the invention；
Fig. 2 is the schematic structure principle that air-conditioning device according to an embodiment of the invention is in heating operation state
Figure；
Fig. 3 is the schematic flow chart of the control method of air-conditioning device according to an embodiment of the invention；
Fig. 4 is the schematic structure principle that air-conditioning device according to an embodiment of the invention is under adverse current defrosting mode
Figure；
Fig. 5 is the schematic flow chart of the control method of a further embodiment according to the present invention.
Specific embodiment
The embodiment of the present invention provides a kind of air-conditioning device and its control method.Fig. 1 is according to an embodiment of the invention
The schematic structure schematic diagram of air-conditioning device.Air-conditioning device 1 includes the compressor 10 for compression refrigerant, is filled for switching air-conditioning
Put four-way valve 20 that refrigerant in 1 refrigeration system flows to, for carrying out the indoor heat exchanger 30 of heat exchange with room air, have
The double-tube heat exchanger 40 of inside and outside two layers of pipeline, for the expansion valve 50 that throttles to refrigerant and for carrying out heat with outdoor air
The outdoor heat exchanger 60 of exchange.Further, air-conditioning device 1 may also include to promote room air in the interior of air-conditioning device
The inside and outside indoor fan 31 circulated of machine and for promoting outdoor air inside the outdoor unit of air-conditioning device and outer
The outdoor fan 61 that portion circulates.A liquid storage device 11 can be also equipped at the refrigerant inlet of compressor 10, so that return
Refrigerant is first flowed into liquid storage device 11, and then is entered back into compressor 10.
Fig. 2 is the schematic structure principle that air-conditioning device according to an embodiment of the invention is in heating operation state
Scheme, the straight arrows in figure represent refrigerant flow direction.In 1 heating operation of air-conditioning device, wherein one layer pipe of double-tube heat exchanger 40
Road (such as can be inner tube 41) connects the refrigerant exit of indoor heat exchanger 30 and the refrigerant inlet of outdoor heat exchanger 60 respectively, set
Another layer of pipeline (such as can be outer tube 42) of heat exchange of heat pipe 40 connects refrigerant exit and the compression of outdoor heat exchanger 60 respectively
The refrigerant inlet of machine 10.
When 1 heating operation of air-conditioning device for a period of time after, the surface of outdoor heat exchanger 60 can frosting.Using refrigerant adverse current
Adverse current Defrost mode is no doubt feasible, but as described in background section, independent adverse current Defrost mode has many defects,
Therefore the mode that present inventor attempts to combine fair current defrosting mode and adverse current defrosting mode is to outdoor heat exchanger
60 defrost.The present inventor repeatedly tries the fair current defrosting process and adverse current defrosting process of outdoor heat exchanger 60
Test, observe and analyze, finally found that, fair current defrosting mode and adverse current defrosting mode all there are optimal outdoor temperature section,
That is it is removed only when the outdoor environment temperature residing for air-conditioning device 1 is in the range of certain temperature range using fair current
The effect that white pattern obtains is only best (at least better than the defrosting effect acquired by adverse current defrosting mode).The outdoor temperature area
Between setting Main Basiss outdoor environment humidity, i.e., when outdoor temperature section is the smaller or suitable situation of outdoor environment humidity
Relatively suitable for using fair current defrosting mode during the usually residing temperature range of lower outdoor environment temperature, outdoor environment humidity is larger
In the case of compare suitable for use adverse current defrosting mode.
Based on the above control method for finding the design present invention, Fig. 3 is air-conditioning device according to an embodiment of the invention
Control method schematic flow chart.The control method of the present invention includes：When 1 heating operation of air-conditioning device to outdoor heat exchanger
60 when needing defrosting, judges outdoor environment temperature residing for air-conditioning device 1 whether in the range of preset temperature section, if
It is then to start fair current defrosting mode；If it is not, then start adverse current defrosting mode.Under fair current defrosting mode, four-way valve 20 is kept
State is constant, promotes 50 standard-sized sheet of expansion valve.Under adverse current defrosting mode, switch the state of four-way valve 20, to promote air-conditioning device 1
Refrigerant flow direction when interior refrigerant is flowed to 1 heating operation of air-conditioning device or in fair current defrosting mode is opposite.
The control method of the present invention is selectively defrosted according to the difference of outdoor environment temperature using the fair current of refrigerant fair current
The adverse current defrosting mode of pattern or refrigerant adverse current can make full use of two kinds of respective advantages of defrosting mode, realize in low temperature system
It is in thermal process that the effect of the various aspects such as the comfortable sexual experience of defrosting time, defrosting efficiency, defrosting effect and user is optimal
The purpose of change.
Specifically, under fair current defrosting mode, refrigerant flow direction and heating operation in the entire refrigeration system of air-conditioning device 1
When refrigerant flow to it is identical.Specifically, due to 50 standard-sized sheet of expansion valve, the high temperature refrigerant that compressor 10 generates can pass sequentially through
Four-way valve 20, indoor heat exchanger 30, the inner tube 41 of double-tube heat exchanger 30 enter outdoor heat exchanger 60, so as to utilize high temperature refrigerant pair
Outdoor heat exchanger 60 defrosts.The outer tube of low temperature refrigerant sleeve pipe heat exchanger 40 after defrosting to outdoor heat exchanger 60
42, with flowing to liquid storage device 11 after the high temperature refrigerant heat exchange in inner tube 41 in outer tube 42, finally return that compressor 10, complete one
A cycling, so as to fulfill the purpose of fair current defrosting.Under fair current defrosting mode, compressor 10 need not stop, four-way valve 20
State need not switch, save four-way valve 20 commutate, system refrigerant balance the stand-by period, shorten the defrost of air-conditioning device 1
Process duration.Meanwhile fair current defrosting mode does not have four-way valve 20 to commutate, compressor 10 is shut down and 10 low frequency of compressor
Noise problem caused by operation, and the problem of system pressure caused by also avoiding 20 switching direction of four-way valve is larger, improve
The stability of system operation.
Fig. 4 is the schematic structure principle that air-conditioning device according to an embodiment of the invention is under adverse current defrosting mode
Scheme, the straight arrows in figure represent refrigerant flow direction.Under adverse current defrosting mode, the state of four-way valve 20 switches to so that compressor
The high temperature refrigerant of 10 outputs flows directly into outdoor heat exchanger 60, so as to defrost to it.After defrosting to outdoor heat exchanger 60
Expanded valve 20, the inner tube of double-tube heat exchanger 40, indoor heat exchanger 30, the outer tube of double-tube heat exchanger 40 are back to storage to refrigerant successively
Liquid device 11, and then complete a Xun Huan into compressor 10.
In some embodiments of the invention, above-mentioned preset temperature section may include (0, ∞) and (- ∞, t4) two temperature
Subinterval, wherein, t4Less than zero.Specifically, t4Value can be according to the different and different of 1 their location of air-conditioning device.
For example, in some common areas, t4It can be -3 DEG C.That is, when outdoor environment temperature be in (0, ∞) and (- ∞, -3
DEG C) when, the humidity of outdoor environment is relatively low or moderate, and fair current defrosting mode is better than adverse current defrosting mode.At outdoor environment temperature
When outside the scope in preset temperature section (such as outdoor environment temperature is in above-mentioned t4When between to 0 DEG C), outdoor environment
Humidity is larger, and the frosting of outdoor heat exchanger 60 is more serious, does not apply to fair current defrosting mode at this time, and suitable for adverse current defrosting mould
Formula could fast and effeciently defrost to outdoor heat exchanger 60.
Further, when outdoor environment temperature is in different temperature subintervals, the concrete operations of fair current defrosting mode
Also it is different.Fig. 5 is the schematic flow chart of the control method of a further embodiment according to the present invention.Specifically, it is suitable
Stream defrosting modular further includes：When outdoor environment temperature is in the range of the temperature subinterval of (0, ∞), start air-conditioning device 1
Outdoor fan 61；When outdoor environment temperature is in (- ∞, t4) temperature subinterval in the range of when, stop outdoor fan 61
Operation.That is, when outdoor environment temperature is at 0 degree or more, outdoor fan 61 can be also opened, to accelerate outdoor heat exchanger 60
The air flow in residing space so as to which the heat auxiliary outdoor heat exchanger 60 contained using outdoor air is defrosted, improves
Defrosting efficiency and defrosting effect.When outdoor environment temperature is below 0 degree, starts outdoor fan 61 and do not change but not to outdoor
Hot device 60 defrosts favorably, but also can aggravate the frosting degree of outdoor heat exchanger 60.
In some embodiments of the invention, under fair current defrosting mode, compressor 10 can be with the highest frequency of permission
Operation, to improve defrosting efficiency and defrosting effect.
In some embodiments of the invention, fair current defrosting mode may include：Judge the coil temperature of indoor heat exchanger 30
Whether the first preset temperature is more than or equal to, if so, starting the indoor fan 31 of air-conditioning device 1；If it is not, then stop indoor fan
31 operation, and heating is carried out to the coil pipe of indoor heat exchanger 30 until its coil temperature meets or exceeds the described first default temperature
After degree, restart indoor fan 31.Setting for first preset temperature has optimal comfort as standard using user.Specifically,
First preset temperature can be any temperature value between 35~37 DEG C.For example, the first preset temperature can be 35 DEG C, 36 DEG C or
37℃.When the first preset temperature be 36 DEG C when best results.
That is, the fair current defrosting mode of the present invention can also be according to the coil temperature of indoor heat exchanger 30 to indoor fan
31 operating is especially controlled so that start indoor fan 31 when the coil temperature of indoor heat exchanger 30 is higher immediately, it is indoor
When the coil temperature of heat exchanger 30 is relatively low, restart indoor fan 31 after first being heated to coil pipe.Thus, it is ensured that no matter assorted
In the case of can all blow out proper temperature and the stronger warm wind of comfort, avoid existing adverse current and force indoor wind during defrosting
The technical issues of machine stopping causes fluctuations in indoor temperature larger and causes comfort poor.
Specifically, air-conditioning device 1 further includes the heating unit 32 heated for the coil pipe to indoor heat exchanger 30, adds
Thermal 32 can be the electric heater units such as electric heating wire, electric heating tube or the heating unit of other suitable types.
In some embodiments of the invention, starting the operation of indoor fan 31 may include：According to the outlet air of air-conditioning device 1
The rotating speed of temperature range control indoor fan 31 residing for temperature, so that leaving air temp is higher, the rotating speed of indoor fan 31 is got over
Greatly.That is, the rotating speed of indoor fan 31 can be adjusted according to the temperature range difference residing for leaving air temp, with into one
The possibility of heating experience difference caused by step reduces fluctuations in indoor temperature, so as to further improve the comfortable sexual experience of user.
Under fair current defrosting mode, the indoor fan when rotating speed of indoor fan 31 is preferably smaller than 1 heating operation of air-conditioning device
31 rotating speed.
Further, the temperature range residing for leaving air temp may include (0, t1)、[t1, t2)、[t2, t3) and [t3, ∞) and four
A temperature range, wherein, t3>t2>t1.When the temperature range residing for the leaving air temp of air-conditioning device 1 is respectively (0, t1)、[t1,
t2)、[t2, t3) and [t3, ∞) when, indoor fan 31 is respectively with D1、D2、D3And D4Rotating speed operation, wherein D4>D3>D2>D1.It is excellent
Selection of land, D4、D3、D2And D1Both less than 1 heating operation of air-conditioning device when indoor fan 31 rotating speed.In a preferred embodiment
In, t1Can be 30 DEG C, t2Can be 34 DEG C, t3It can be 38 DEG C.In further embodiments, t1、t2And t3It can also distinguish
For other suitable temperature values, such as t1Can be any temperature value between 28~31 DEG C, t2Can be 33~35 DEG C between
Any temperature value, t3Can be any temperature value between 37~39 DEG C, as long as it is upper to ensure that three temperature range endpoint values have
State magnitude relationship.
In some embodiments of the invention, in the temperature range control room residing for the leaving air temp according to air-conditioning device 1
Before the rotating speed of inner blower 31, control method of the invention further includes：The leaving air temp of air-conditioning device 1 is periodically obtained,
In, the time cycle for obtaining the leaving air temp of air-conditioning device 1 is any length of time value in 4~6s.For example, obtain air-conditioning dress
The time cycle for putting 1 leaving air temp can be 4s, 5s or 6s, that is to say, per 4s, air-conditioning device 1 of acquisition goes out wind-warm syndrome
Degree or every 5s obtain the leaving air temp of air-conditioning device 1 of leaving air temp or every 6s acquisitions for an air-conditioning device 1.It is preferred that
Ground, the best results when time cycle for obtaining the leaving air temp of air-conditioning device 1 can be 5s.
Specifically, the mode of temperature sensor detection can be used in the acquisition of 1 leaving air temp of air-conditioning device, for example, can be in sky
It adjusts and the temperature sensor for detecting leaving air temp is set at the air outlet of device 1.In further embodiments, it can also be passed through
His suitable mode obtains 1 leaving air temp of air-conditioning device.
In some embodiments of the invention, after indoor fan 31 is started, control method of the invention further includes：When
The coil temperature of outdoor heat exchanger 60 reaches the second preset temperature and maintains the disk of the second preset duration or outdoor heat exchanger 60
Tube temperature degree reaches the 3rd preset temperature and maintains fair current defrosting mode described in the 3rd preset duration backed off after random.Second preset temperature is small
In the 3rd preset temperature, the second preset duration is more than the 3rd preset duration.That is, the coil pipe of outdoor heat exchanger 60 can be passed through
Temperature decides whether to exit fair current defrosting mode.When the coil temperature of outdoor heat exchanger 60 reaches the second preset temperature and maintains
The coil temperature of second preset duration or outdoor heat exchanger 60 reaches the 3rd preset temperature and maintains table after the 3rd preset duration
Show that the frosting on outdoor heat exchanger 60 has been removed totally.
Specifically, the second preset temperature can be 2 DEG C, and the 3rd preset temperature can be 3 DEG C, and the second preset duration can be
60s, the 3rd preset duration can be 20s.
In some embodiments of the invention, when the coil temperature of outdoor heat exchanger 60 reaches the 4th preset temperature and maintains
The coil temperature of 4th preset duration or outdoor heat exchanger 60 reaches the 5th preset temperature and the 5th preset duration is maintained to retreat
Go out adverse current defrosting mode.4th preset temperature is less than the 5th preset temperature, and the 4th preset duration is more than the 5th preset duration.Also
It is to say, can decides whether to exit adverse current defrosting mode by the coil temperature of outdoor heat exchanger 60.When outdoor heat exchanger 60
Coil temperature reaches the 4th preset temperature and the coil temperature of the 4th preset duration or outdoor heat exchanger 60 is maintained to reach the 5th
Represent that the frosting on outdoor heat exchanger 60 has been removed totally after preset temperature and the 5th preset duration of maintenance.
Specifically, the 4th preset temperature can be 5 DEG C, and the 5th preset temperature can be 10 DEG C, and the 4th preset duration can be with
For 60s, the 3rd preset duration can be 20s.
In some embodiments, control method of the invention further includes defrosting anticipation step：
Periodically obtain the coil temperature of the outdoor environment temperature and outdoor heat exchanger 60 residing for air-conditioning device 1；According to
Outdoor environment temperature calculates solidifying dew-point temperature；It is held when the time that the coil temperature of outdoor heat exchanger 60 is less than or equal to solidifying dew-point temperature
Then judge that outdoor heat exchanger 60 needs to defrost during continuous first preset duration.First preset duration can be between 1.5~2.5min
Any length of time value.For example, the first preset duration can be 1.5min, 2.0min or 2.5min.When the first preset duration
For 2.0min when best results.
Further, the time cycle for obtaining the coil temperature of outdoor environment temperature and outdoor heat exchanger 60 is can be with 2S.
The coil temperature of an outdoor environment temperature and outdoor heat exchanger 60 is obtained per 2s.
It is possible to further calculate solidifying dew-point temperature according to the following formula：Tes=C*Tao-a, wherein, Tes is condensation point
Temperature, Tao are outdoor environment temperature, and C and a are constant.Specifically, C can be using value as 6 by 0.6, a of value.
Air-conditioning device 1 provided by the invention include compressor 10, four-way valve 20, indoor heat exchanger 30, double-tube heat exchanger 40,
Expansion valve 50 and outdoor heat exchanger 60, in 1 heating operation of air-conditioning device, wherein one layer of pipeline of double-tube heat exchanger 40 connects respectively
Connect the refrigerant exit of indoor heat exchanger 30 and the refrigerant inlet of outdoor heat exchanger 60, another layer of pipeline difference of double-tube heat exchanger 40
The refrigerant exit of outdoor heat exchanger 60 and the refrigerant inlet of compressor 10 are connected, and air-conditioning device 1 is configured to any of the above-described
It is run under the control of control method described in embodiment.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple showing for the present invention
Example property embodiment, still, without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or derive many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers other all these variations or modifications.
Claims (12)
1. a kind of control method of air-conditioning device, the air-conditioning device includes compressor, four-way valve, indoor heat exchanger, casing and changes
Hot device, expansion valve and outdoor heat exchanger, wherein one layer of pipeline of described sleeve pipe heat exchanger in the air-conditioning device heating operation
Connect the refrigerant exit of the indoor heat exchanger and the refrigerant inlet of the outdoor heat exchanger respectively, described sleeve pipe heat exchanger it is another
One layer of pipeline connects the refrigerant exit of the outdoor heat exchanger and the refrigerant inlet of the compressor, the control method bag respectively
It includes：
When the air-conditioning device heating operation to the outdoor heat exchanger needs defrosting, the room residing for the air-conditioning device is judged
Whether external environment temperature is in the range of preset temperature section, if so, starting fair current defrosting mode；If it is not, then start inverse
Flow defrosting mode；And
Under the fair current defrosting mode, the state for keeping the four-way valve is constant, promotes the expansion valve standard-sized sheet；Described inverse
It flows under defrosting mode, switches the state of the four-way valve, filled so that the refrigerant in the air-conditioning device is promoted to flow to the air-conditioning
It puts heating operation or refrigerant flow direction during in fair current defrosting mode is opposite.
2. control method according to claim 1, which is characterized in that
Under the fair current defrosting mode, the compressor is run with the highest frequency allowed.
3. control method according to claim 1, which is characterized in that
The fair current defrosting mode includes：Judge whether the coil temperature of the indoor heat exchanger is more than or equal to the first default temperature
Degree, if so, starting the indoor fan of the air-conditioning device；If it is not, then stop the operation of the indoor fan, and to the room
The coil pipe of interior heat exchanger carries out heating after its coil temperature meets or exceeds first preset temperature, restarts the room
Inner blower.
4. control method according to claim 3, which is characterized in that starting the operation of the indoor fan includes：
Temperature range according to residing for the leaving air temp of the air-conditioning device controls the rotating speed of the indoor fan, so that described
Leaving air temp is higher, and the rotating speed of the indoor fan is bigger.
5. control method according to claim 4, which is characterized in that
Temperature range residing for the leaving air temp includes (0, t1)、[t1, t2)、[t2, t3) and [t3, ∞) and four temperature ranges,
Wherein, t3>t2>t1；And
When the temperature range residing for the leaving air temp of the air-conditioning device is respectively (0, t1)、[t1, t2)、[t2, t3) and [t3, ∞)
When, the indoor fan is respectively with D1、D2、D3And D4Rotating speed operation, wherein D4>D3>D2>D1。
6. control method according to claim 4, which is characterized in that
It is described before the rotating speed for controlling the indoor fan in the temperature range residing for the leaving air temp according to the air-conditioning device
Control method further includes：Periodically obtain the leaving air temp of the air-conditioning device；Wherein
The time cycle of the leaving air temp of the air-conditioning device is obtained as any length of time value in 4~6S.
7. control method according to claim 3, which is characterized in that after the indoor fan is started, the control
Method further includes：
When the coil temperature of the outdoor heat exchanger reaches the second preset temperature and maintains the second preset duration or the outdoor
The coil temperature of heat exchanger reaches the 3rd preset temperature and maintains fair current defrosting mode described in the 3rd preset duration backed off after random；Wherein
Second preset temperature is less than the 3rd preset temperature, when second preset duration is default more than the described 3rd
It is long.
8. control method according to claim 1, which is characterized in that
The preset temperature section includes (0, ∞) and (- ∞, t4) two temperature subintervals, wherein, t4Less than zero；
The fair current defrosting modular further includes：
When the outdoor environment temperature is in the range of the temperature subinterval of (0, ∞), start the outdoor wind of the air-conditioning device
Machine；When the outdoor environment temperature is in (- ∞, t4) temperature subinterval in the range of when, stop the operation of the outdoor fan.
9. control method according to claim 1, which is characterized in that
When the coil temperature of the outdoor heat exchanger reaches the 4th preset temperature and maintains the 4th preset duration or the outdoor
The coil temperature of heat exchanger reaches the 5th preset temperature and maintains the 5th preset duration backed off after random adverse current defrosting mode；Wherein
4th preset temperature is less than the 5th preset temperature, when the 4th preset duration is default more than the described 5th
It is long.
10. control method according to claim 1, which is characterized in that further include：
Defrosting anticipation step：Periodically obtain outdoor environment temperature residing for the air-conditioning device and the outdoor heat exchanger
Coil temperature；
Solidifying dew-point temperature is calculated according to the outdoor environment temperature；
When the time that the coil temperature of the outdoor heat exchanger is less than or equal to the solidifying dew-point temperature continuing the first preset duration
Then judge that the outdoor heat exchanger needs to defrost.
11. control method according to claim 10, which is characterized in that
The solidifying dew-point temperature is calculated according to the following formula：Tes=C*Tao-a, wherein, Tes is solidifying dew-point temperature, and Tao is room
External environment temperature, C and a are constant.
12. a kind of air-conditioning device, including compressor, four-way valve, indoor heat exchanger, double-tube heat exchanger, expansion valve and outdoor heat exchange
Device, in the air-conditioning device heating operation, wherein one layer of pipeline of described sleeve pipe heat exchanger connects the indoor heat exchanger respectively
Refrigerant exit and the outdoor heat exchanger refrigerant inlet, another floor pipeline of described sleeve pipe heat exchanger connect the room respectively
The refrigerant inlet of the refrigerant exit of external heat exchanger and the compressor, wherein
The air-conditioning device is configured to run under the control of any control methods of claim 1-11.
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| CN201711038551.7A CN108072214A (en) | 2017-10-30 | 2017-10-30 | Air-conditioning device and its control method |
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| CN109751713A (en) * | 2018-12-28 | 2019-05-14 | 广东美的暖通设备有限公司 | The defrosting control method and storage medium of a kind of air conditioner, air conditioner |
| CN110017625A (en) * | 2019-03-26 | 2019-07-16 | 湖南中谷科技股份有限公司 | A kind of refrigeration system, control method and refrigeration equipment |
| CN110243058A (en) * | 2019-06-14 | 2019-09-17 | 湖南省宝满科技开发有限公司 | A kind of the defrosting processing method and system of central air-conditioning outdoor unit |
| CN111964300A (en) * | 2020-08-17 | 2020-11-20 | 广东美的暖通设备有限公司 | Control method and device of air source heat pump equipment, equipment and readable storage medium |
| CN112484239A (en) * | 2020-12-21 | 2021-03-12 | 海信（广东）空调有限公司 | Air conditioner defrosting method and air conditioner |
| CN112577101A (en) * | 2019-09-11 | 2021-03-30 | 广东美的制冷设备有限公司 | Air conditioner and control method thereof |
| CN113825962A (en) * | 2019-05-14 | 2021-12-21 | 伊利威尔康特罗斯单一股份有限公司 | Defrosting control method of refrigerating device and corresponding electronic device |
| CN114183880A (en) * | 2021-12-22 | 2022-03-15 | 宁波奥克斯电气股份有限公司 | Mildew-proof control method and air conditioner |
| CN115574557A (en) * | 2022-09-30 | 2023-01-06 | 青岛海尔空调电子有限公司 | Heat pump drying unit and defrosting control method thereof |
| CN115807995A (en) * | 2022-12-08 | 2023-03-17 | 珠海格力电器股份有限公司 | Air conditioner heating control method, device, equipment and storage medium |
| US12104833B2 (en) | 2019-09-11 | 2024-10-01 | Gd Midea Air-Conditioning Equipment Co., Ltd. | Air conditioner and control method therefor |
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| CN109751713A (en) * | 2018-12-28 | 2019-05-14 | 广东美的暖通设备有限公司 | The defrosting control method and storage medium of a kind of air conditioner, air conditioner |
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| CN113825962B (en) * | 2019-05-14 | 2023-08-22 | 伊利威尔康特罗斯单一股份有限公司 | Defrosting control method of refrigeration device and corresponding electronic device |
| CN113825962A (en) * | 2019-05-14 | 2021-12-21 | 伊利威尔康特罗斯单一股份有限公司 | Defrosting control method of refrigerating device and corresponding electronic device |
| CN110243058A (en) * | 2019-06-14 | 2019-09-17 | 湖南省宝满科技开发有限公司 | A kind of the defrosting processing method and system of central air-conditioning outdoor unit |
| US12104833B2 (en) | 2019-09-11 | 2024-10-01 | Gd Midea Air-Conditioning Equipment Co., Ltd. | Air conditioner and control method therefor |
| CN112577101A (en) * | 2019-09-11 | 2021-03-30 | 广东美的制冷设备有限公司 | Air conditioner and control method thereof |
| CN111964300A (en) * | 2020-08-17 | 2020-11-20 | 广东美的暖通设备有限公司 | Control method and device of air source heat pump equipment, equipment and readable storage medium |
| CN112484239B (en) * | 2020-12-21 | 2022-05-03 | 海信（广东）空调有限公司 | Air conditioner defrosting method and air conditioner |
| CN112484239A (en) * | 2020-12-21 | 2021-03-12 | 海信（广东）空调有限公司 | Air conditioner defrosting method and air conditioner |
| CN114183880A (en) * | 2021-12-22 | 2022-03-15 | 宁波奥克斯电气股份有限公司 | Mildew-proof control method and air conditioner |
| CN115574557A (en) * | 2022-09-30 | 2023-01-06 | 青岛海尔空调电子有限公司 | Heat pump drying unit and defrosting control method thereof |
| CN115807995A (en) * | 2022-12-08 | 2023-03-17 | 珠海格力电器股份有限公司 | Air conditioner heating control method, device, equipment and storage medium |
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