CN105972851A - Air conditioning system and frosting inhibition control method thereof - Google Patents
Air conditioning system and frosting inhibition control method thereof Download PDFInfo
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- CN105972851A CN105972851A CN201610334275.8A CN201610334275A CN105972851A CN 105972851 A CN105972851 A CN 105972851A CN 201610334275 A CN201610334275 A CN 201610334275A CN 105972851 A CN105972851 A CN 105972851A
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- outdoor heat
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000005764 inhibitory process Effects 0.000 title abstract 2
- 239000002826 coolant Substances 0.000 claims description 31
- 230000001629 suppression Effects 0.000 claims description 14
- 230000000052 comparative effect Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 22
- 239000003507 refrigerant Substances 0.000 abstract description 8
- 238000005457 optimization Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010257 thawing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- 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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- 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
- F25B47/003—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing corrosion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F24F11/41—Defrosting; Preventing freezing
-
- 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
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
-
- 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
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02742—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using two four-way valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2103—Temperatures near a heat exchanger
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2106—Temperatures of fresh outdoor air
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioning system, and relates to the technical field of air conditioners. The air conditioning system comprises a main pipeline consisting of a compressor, an outdoor heat exchanger, a throttling device and an indoor heat exchanger which are sequentially connected, and further comprises a refrigerant reversing device, wherein the refrigerant reversing device enables the throttling device to be communicated with a first end or a second end of the outdoor heat exchanger, and when one end of the outdoor heat exchanger is communicated with the throttling device, the other end of the outdoor heat exchanger is communicated with the compressor. Meanwhile, the frosting inhibition control method suitable for the air conditioning system is further disclosed. The air conditioner system is provided with the refrigerant reversing device, when the heating forward flow path of the air conditioner system is frosted to a certain condition, the flow direction of the refrigerant flowing through the outdoor heat exchanger can be switched through the refrigerant reversing device, so that the frosting period is effectively prolonged, the heating comfort is improved, and meanwhile, the heating flow path of the outdoor heat exchanger is not single, so that the optimization of the flow path is facilitated.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly relate to the suppression knot of a kind of air conditioning system and this air conditioning system
Frost control method.
Background technology
In current air conditioning system, it is mostly and uses a cross valve to switch refrigeration and heating mode,
Defrosting after heating mode off-premises station frosting, is the key factor affecting comfortableness, how to extend outdoor
When side frosting cycle, minimizing defrost, indoor temperature drop is one of focus of always refrigeration industry research.Traditional
When single cross valve air conditioning system is owing to heating, outside coolant is only along the refrigerant flow reverse flow of refrigeration,
Frost formation process is to spread after local starts frosting, and after beginning frosting, frosting velocity is exponentially accelerated, in
It is the most frequently to defrost, indoor heating effect can be affected, heat comfortableness poor；Separately
Outward, the reverse stream that traditional single cross valve air conditioning system was applicable to freeze originally is not necessarily suitable and heats mould
Formula, it is single that outdoor heat exchanger heats stream, is unfavorable for optimizing stream.
Summary of the invention
It is an object of the invention to propose a kind of simple in construction, extend the frosting cycle, improve and heat comfortableness,
Be conducive to the air conditioning system that stream optimizes.
Another object of the present invention is to propose a kind of suppression frosting controlling party being applicable to described air conditioning system
Method, this control method can suppress Frost formation process, effectively extends the frosting cycle, improves and heats comfortableness.
For reaching this purpose, the present invention by the following technical solutions:
A kind of air conditioning system, including by the compressor being sequentially connected with, outdoor heat exchanger, throttling arrangement and indoor
The main line of heat exchanger composition, also includes coolant reversing arrangement, and this coolant reversing arrangement makes throttling arrangement and room
First end of external heat exchanger or the connection of the second end, when when wherein one end connects with throttling arrangement of outdoor heat exchanger,
The other end connects with compressor.
As the preferred version of a kind of air conditioning system, described coolant reversing arrangement is the first cross valve, described
First end of one cross valve connects with throttling arrangement, and the second end connects with one end of outdoor heat exchanger, the 3rd end
Connecting with the other end of outdoor heat exchanger, the 4th end connects with the suction end of compressor.
As the preferred version of a kind of air conditioning system, including the second cross valve, the first of described second cross valve
End connects with the exhaust end of compressor, and the second end connects with indoor heat exchanger, the 3rd end and the first cross valve
4th end connection, the 4th end connects with the suction end of compressor.
As the preferred version of a kind of air conditioning system, including control device and respectively with control what device electrically connected
Outer shroud temperature detector surveys device and the outer tube temperature detector that is disposed in the outdoor on heat exchanger surveys device, described control device and the
One cross valve electrical connection, for receive outer shroud temperature detector survey device and outer tube temperature detector survey device temperature signal and to
First cross valve sends the instruction that whether commutates.
As the preferred version of a kind of air conditioning system, described control device include judging unit, comparing unit and
Control unit, described judging unit is for judging that outer shroud temperature detector surveys the outdoor environment temperature T that device detectsOuter shroud
Whether less than design temperature TSet；
Described comparing unit is for outdoor heat exchanger outer tube temperature T detected by outer tube temperature detector survey deviceOuter tubeWith
To fixed temperature TTemperatureCompare, and outdoor heat exchanger outer tube temperature T that outer tube temperature detector survey device is detectedOuter tubeThe outdoor environment temperature T that device detects is surveyed with outer shroud temperature detectorOuter shroudDifference with to fixed difference difference TThe temperature differenceCompare；
Described control unit controls for the comparative result according to the judged result of judging unit and comparing unit
Whether one cross valve commutates.
As the preferred version of a kind of air conditioning system, the lower section of described outdoor heat exchanger is provided with drip tray.
A kind of suppression frosting control method being applicable to air conditioning system as described above, controls device according to outward
The temperature signal that ring temperature detector survey device and outer tube temperature detector survey device detect sends to described coolant reversing arrangement and is
No commutation instruction.
As the preferred version of the suppression frosting control method of a kind of air conditioning system, outside described control device judges
Ring temperature detector surveys the outdoor environment temperature T that device detectsOuter shroudWhether less than design temperature TSet, and by outer tube temperature
Outdoor heat exchanger outer tube temperature T that detection device detectsOuter tubeWith to fixed temperature TTemperatureCompare, and will
Outer tube temperature detector surveys outdoor heat exchanger outer tube temperature T that device detectsOuter tubeSurvey what device detected with outer shroud temperature detector
Outdoor environment temperature TOuter shroudDifference with to fixed difference difference TThe temperature differenceCompare, according to above judged result and compare knot
Fruit controls whether coolant reversing arrangement commutates.
As the preferred version of the suppression frosting control method of a kind of air conditioning system, when outer shroud temperature detector surveys device inspection
The outdoor environment temperature T measuredOuter shroud>=design temperature TSetTime, if t time outer tube temperature detector surveys device inspection continuously
Outdoor heat exchanger outer tube temperature T measuredOuter tube≤ to fixed temperature TTemperature, then control device and control coolant commutation dress
Replace to.
As the preferred version of the suppression frosting control method of a kind of air conditioning system, when outer shroud temperature detector surveys device inspection
The outdoor environment temperature T measuredOuter shroud< design temperature TSetTime, if t time outer tube temperature detector surveys device detection continuously
Outdoor heat exchanger outer tube temperature T arrivedOuter tube-outer shroud temperature detector surveys the outdoor environment temperature T that device detectsOuter shroud>=give
Fixed difference difference TThe temperature difference, then control device and control the commutation of coolant reversing arrangement.
The invention have the benefit that
The present invention proposes a kind of air conditioning system, and this air conditioning system is provided with coolant reversing arrangement, works as air conditioning system
When heating forward stream frosting to certain condition, by the changeable outdoor heat exchanger that flows through of coolant reversing arrangement
The flow direction of coolant, thus effectively extend the frosting cycle, improve and heat comfortableness, meanwhile, outdoor heat exchange
It is the most single that device heats stream, beneficially the optimization of stream.
The present invention also proposes a kind of suppression frosting control method being applicable to described air conditioning system, controls device root
Survey device and outer tube temperature detector according to outer shroud temperature detector to survey temperature signal that device detects and send to coolant reversing arrangement and change
To instruction, switching flows through the flow direction of the coolant of outdoor heat exchanger, thus effectively inhibits Frost formation process, extends
Frosting cycle, improve and heat comfortableness.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the air conditioning system that the specific embodiment of the invention provides；
Fig. 2 is the air conditioning system that the specific embodiment of the invention provides heating capacity when heating frosting and time
Relation schematic diagram.
In figure:
1, compressor；2, outdoor heat exchanger；3, throttling arrangement；4, indoor heat exchanger；5, the first four-way
Valve；6, the second cross valve.
Detailed description of the invention
Technical scheme and the technique effect reached for making to present invention solves the technical problem that, using are clearer,
Below in conjunction with accompanying drawing, the technical scheme of embodiment of the present invention is described in further detail, it is clear that institute
The embodiment described is only a part of embodiment of the present invention rather than whole embodiments.Based on
Embodiment in the present invention, those skilled in the art are obtained under not making creative work premise
Every other embodiment, broadly falls into the scope of protection of the invention.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " front ",
The side of the instruction such as " afterwards ", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward "
Position or position relationship be based on orientation shown in the drawings or position relationship, be for only for ease of description the present invention with
Simplify and describe rather than indicate or imply that the device of indication or element must have specific orientation, with specific
Azimuth configuration and operation, therefore it is not intended that limiting the scope of the invention.
Too fast in order to solve existing air conditioning system frosting, easily enter frequent defrost, have a strong impact on indoor heating
Comfortableness, it is single that outdoor heat exchanger heats stream, is unfavorable for optimizing the problem of stream, and the application proposes one
Novel air conditioning system, as it is shown in figure 1, air conditioning system includes by the compressor 1 being sequentially connected with, outdoor heat exchanger
2, throttling arrangement 3 and indoor heat exchanger 4 composition main line and coolant reversing arrangement, this coolant reversing arrangement
Make throttling arrangement 3 connect with the first end or second end of outdoor heat exchanger 2, when outdoor heat exchanger 2 wherein
When one end connects with throttling arrangement 3, the other end connects with compressor 1.
As one preferred embodiment, this coolant reversing arrangement is the first cross valve 5, the first cross valve 5
The first end connect with throttling arrangement 3, the second end connects with the first end of outdoor heat exchanger 2, the 3rd end with
Second end connection of outdoor heat exchanger 2, the 4th end connects with the suction end of compressor 1.When air conditioning system is
Heat pump, and when heat pump heats forward stream frosting to certain condition, cut by coolant reversing arrangement
The change of current, through the flow direction of the coolant of outdoor heat exchanger 2, effectively extends the frosting cycle, improves and heat comfortableness,
Meanwhile, it is the most single that outdoor heat exchanger 2 heats stream, beneficially the optimization of stream.
As a kind of preferred embodiment, air conditioning system, in addition to including above condenser pipe, also includes
Second cross valve 6, the first end of the second cross valve 6 connects with the exhaust end of compressor 1, and the second end is with indoor
4th end connection of one end connection of heat exchanger 4, the 3rd end and the first cross valve 5, the 4th end and compressor 1
Suction end connection.When air conditioning system is refrigerating and heating systems, and air conditioning system heats forward stream frosting and arrives
During certain condition, flowed through the flow direction of the coolant of outdoor heat exchanger by the commutation switching of the first cross valve 5, have
Effect extends the frosting cycle, improves and heats comfortableness, and meanwhile, when making to heat, outdoor heat exchanger 2 may utilize
Freeze identical stream, and it is the most single that outdoor heat exchanger 2 heats stream, is more beneficial for the optimization of stream.
Preferably, air conditioning system includes the outer shroud temperature detector survey dress controlling device and electrically connecting with control device respectively
Putting and be disposed in the outdoor the outer tube temperature detector on heat exchanger 2 and survey device, wherein, outer shroud temperature detector is surveyed device and is used for examining
Surveying outdoor environment temperature, outer tube temperature detector is surveyed device and is disposed in the outdoor the temperature lowest part of heat exchanger 2, it is also possible to
It is arranged at refrigerant inlet or the position such as at refrigerant outlet, it is possible to detect outdoor heat exchange rapidly and accurately
The outer tube temperature of device 2.Control device and the first cross valve 5 to electrically connect, can receive outer shroud temperature detector survey device with
Outer tube temperature detector is surveyed the temperature signal of device and sends, to the first cross valve 5, the instruction that whether commutates.
Further, this control device includes judging unit, comparing unit and control unit, it is judged that unit is used
In judging that outer shroud temperature detector surveys the outdoor environment temperature T that device detectsOuter shroudWhether less than design temperature TSet.Ratio
Relatively unit is for outdoor heat exchanger 2 outer tube temperature T detected by outer tube temperature detector survey deviceOuter tubeWith to fixed temperature TTemperatureCompare, and outdoor heat exchanger 2 outer tube temperature T that outer tube temperature detector survey device is detectedOuter tubeOutward
Ring temperature detector surveys the outdoor environment temperature T that device detectsOuter shroudDifference with to fixed difference difference TThe temperature differenceCompare.Control
Whether unit can control the first cross valve 5 according to the comparative result of the judged result of judging unit and comparing unit
Commutation.
Compared with traditional refrigerating and heating air conditioner system, the more preferably air conditioning system in embodiment adds
One cross valve 5 and pipeline thereof, wherein, the control mode of the second cross valve 6 is compared with the control of air conditioning system
Cooling and warming switching mode is identical, does not repeats them here.
Present embodiment also proposes a kind of suppression frosting controlling party being applicable to air conditioning system as described above
Method, controls device and surveys device and outer tube temperature detector according to outer shroud temperature detector and survey temperature signal that device detects to described
Coolant reversing arrangement sends the instruction that whether commutates.
It is specific as follows that the suppression frosting of this air conditioning system controls process:
In cooling mode, the first cross valve 5 always must not be electric, and the coolant in air conditioning system is by pipeline a, b
After outdoor heat exchanger 2 heat exchange, c, d flow to indoor heat exchanger 4 the most by the road, and coolant flows to common empty
Adjusting system, now, the first cross valve 5 is without practical function.
In a heating mode, the first cross valve 5 at the beginning must not electricity, the coolant in air conditioning system by pipeline d,
C after outdoor heat exchanger 2 heat exchange the most by the road b, a be back to compressor 1, in the process, work as room
External heat exchanger 3 copper pipe, fin temperature are less than the dew point temperature of air and less than design temperature TSet(this enforcement
Example is preferably 0 DEG C) time, copper pipe, fin start frosting, from air conditioner refrigerating principle, in actual frosting
Cheng Zhong, frost is not that each position on outdoor heat exchanger 2 produces simultaneously, but by local location
(and majority of case is that the inlets or outlets of flow process starts), and be diffused along flow process, special by frosting
Knowable to property, after starting frosting, the speed of frosting can exponentially be accelerated.Therefore when air conditioning system forward stream
When road frosting is to following condition, the first cross valve 5 must electric switch over:
When outer shroud temperature detector surveys the outdoor environment temperature T that device detectsOuter shroudWhen >=0 DEG C, if t time outer tube continuously
Temperature detector surveys outdoor heat exchanger 2 outer tube temperature T that device detectsOuter tube≤ to fixed temperature TTemperature, then first is carried out
The switching of cross valve 5.
When outer shroud temperature detector surveys the outdoor environment temperature T that device detectsOuter shroud< when 0 DEG C, if t time outer tube continuously
Temperature detector surveys outdoor heat exchanger 2 outer tube temperature T that device detectsOuter tube-outer shroud temperature detector surveys the outdoor that device detects
Ambient temperature TOuter shroud>=to fixed difference difference TThe temperature difference, then the switching of the first cross valve 5 is carried out.Concrete example illustrates such as
Under:
First cross valve 5 switches TOuter tubeValue parameter list
| TOuter shroud | TOuter tube(unit DEG C) | Parameter name |
| 5℃≤TOuter shroud＜ 15 DEG C | -1 | TTemperature 1 |
| 0℃≤TOuter shroud＜ 5 DEG C | -4 | TTemperature 2 |
| -5℃≤TOuter shroud＜ 0 DEG C | 4 | TThe temperature difference 1 |
| -10℃≤TOuter shroud＜-5 DEG C | 4 | TThe temperature difference 2 |
| -15℃≤TOuter shroud＜-10 DEG C | 4 | TThe temperature difference 3 |
| -20℃≤TOuter shroud＜-15 DEG C | 3 | TThe temperature difference 4 |
| -25℃≤TOuter shroud＜-20 DEG C | 2 | TThe temperature difference 5 |
| TOuter shroud＜-25 DEG C | 2 | TThe temperature difference 6 |
In above table, outer tube temperature TOuter tubeValue error preferably ± 2 DEG C.To fixed temperature TTemperatureValue
Range preferably from-5 DEG C 5 DEG C, value error preferably ± 2 DEG C.To fixed difference difference TThe temperature differenceSpan be preferably 0
8 DEG C, value error preferably ± 2 DEG C.
After the first cross valve 5 switching, the pipeline in outdoor heat exchanger 2 side of the coolant in air conditioning system flows to
For: d-b-c-a so that switch the stream before the first cross valve 5 and stop frosting or thicken frost with relatively low velocity
Layer, from reversely initially entering Frost formation process, extends the frosting cycle, reduces heating capacity rate of decay simultaneously,
Improve heating capacity, improve and heat comfortableness.
As in figure 2 it is shown, heating capacity changes over trend that's about the size of it after air conditioning system heating operations frosting,
According to common air-conditioning system, after the T1 moment, heating capacity changes the trend presented such as dashed curve, heating capacity
Drastically decline, defrost in the T2 moment, use the air conditioning system of this programme, carry out stream in the T1 moment
After switching, heating capacity changes the trend presented such as solid line, slow fall after heating capacity first slow liter, carries out in the T3 moment
Defrosting, the frosting cycle then extends the time of T3-T2.
First cross valve 5 electric after, carry out defrosting condition judgement and defrosting control mode compared with air conditioning system
Defrost mode, also repeat no more at this.
In the present embodiment, the outflow of the condensed water of outdoor heat exchanger 2 for convenience, outdoor heat exchanger 2
Lower section is provided with the drip tray accepting condensed water.Throttling arrangement 3 is preferably electric expansion valve, is not only suitable for machine
Electrical integrated and demand for development, it is possible to accurately reflect out the change of the degree of superheat at low ambient temperatures, Er Qiejie
Can consumption reduction.
The know-why of the present invention is described above in association with detailed description of the invention.These describe and are intended merely to explain
The principle of the present invention, and limiting the scope of the invention can not be construed to by any way.Based on herein
Explanation, those skilled in the art need not to pay creative work, and can to associate other of the present invention concrete
Embodiment, within these modes fall within protection scope of the present invention.
Claims (10)
1. an air conditioning system, including by the compressor (1) being sequentially connected with, outdoor heat exchanger (2), throttling
The main line that device (3) and indoor heat exchanger (4) form, it is characterised in that also include coolant commutation dress
Putting, this coolant reversing arrangement makes throttling arrangement (3) connect with the first end or second end of outdoor heat exchanger (2)
Logical, when wherein one end of outdoor heat exchanger (2) connects with throttling arrangement (3), the other end and compressor
(1) connection.
Air conditioning system the most according to claim 1, it is characterised in that described coolant reversing arrangement is
One cross valve (5), the first end of described first cross valve (5) connects with throttling arrangement (3), the second end
Connecting with one end of outdoor heat exchanger (2), the 3rd end connects with the other end of outdoor heat exchanger (2), the
Four ends connect with the suction end of compressor (1).
Air conditioning system the most according to claim 2, it is characterised in that include the second cross valve (6),
First end of described second cross valve (6) connects with the exhaust end of compressor (1), and the second end changes with indoor
Hot device (4) connects, the 3rd end and the 4th end connection of the first cross valve (5), the 4th end and compressor (1)
Suction end connection.
Air conditioning system the most according to claim 3, it is characterised in that include control device and respectively with
The outer shroud temperature detector controlling device electrical connection surveys device and the outer tube temperature detector survey dress being disposed in the outdoor on heat exchanger (2)
Put, described control device and the first cross valve (5) electrical connection, be used for receiving outer shroud temperature detector and survey device and outer tube
Temperature detector is surveyed the temperature signal of device and sends, to the first cross valve (5), the instruction that whether commutates.
Air conditioning system the most according to claim 4, it is characterised in that described control device includes judging
Unit, comparing unit and control unit, described judging unit is for judging that outer shroud temperature detector surveys what device detected
Outdoor environment temperature TOuter shroudWhether less than design temperature TSet；
Described comparing unit is for outdoor heat exchanger (2) outer tube temperature T detected by outer tube temperature detector survey deviceOuter tubeWith to fixed temperature TTemperatureCompare, and the outdoor heat exchanger (2) that outer tube temperature detector survey device is detected
Outer tube temperature TOuter tubeThe outdoor environment temperature T that device detects is surveyed with outer shroud temperature detectorOuter shroudDifference with to fixed difference difference TTemperature DifferenceCompare；
Described control unit controls for the comparative result according to the judged result of judging unit and comparing unit
Whether one cross valve (5) commutates.
Air conditioning system the most according to claim 1, it is characterised in that described outdoor heat exchanger (2)
Lower section be provided with drip tray.
7. the suppression frosting controlling party of the air conditioning system being applicable to as described in any one of claim 1 to 6
Method, it is characterised in that control device and survey, according to outer shroud temperature detector survey device and outer tube temperature detector, the temperature that device detects
Degree signal sends, to described coolant reversing arrangement, the instruction that whether commutates.
The suppression frosting control method of air conditioning system the most according to claim 7, it is characterised in that institute
State and control the outdoor environment temperature T that device judges that outer shroud temperature detector survey device detectsOuter shroudWhether less than design temperature
TSet, and outdoor heat exchanger (2) outer tube temperature T that outer tube temperature detector survey device is detectedOuter tubeWith to fixed temperature
TTemperatureCompare, and outdoor heat exchanger (2) outer tube temperature T that outer tube temperature detector survey device is detectedOuter tube
The outdoor environment temperature T that device detects is surveyed with outer shroud temperature detectorOuter shroudDifference with to fixed difference difference TThe temperature differenceCompare,
Control whether coolant reversing arrangement commutates according to above judged result and comparative result.
The suppression frosting control method of air conditioning system the most according to claim 8, it is characterised in that when
Outer shroud temperature detector surveys the outdoor environment temperature T that device detectsOuter shroud>=design temperature TSetTime, if the t time continuously
Outer tube temperature detector surveys outdoor heat exchanger (2) outer tube temperature T that device detectsOuter tube≤ to fixed temperature TTemperature, then control
Device processed controls the commutation of coolant reversing arrangement.
The suppression frosting control method of air conditioning system the most according to claim 8, it is characterised in that
When outer shroud temperature detector surveys the outdoor environment temperature T that device detectsOuter shroud< design temperature TSetTime, if the t time continuously
Outer tube temperature detector surveys outdoor heat exchanger (2) outer tube temperature T that device detectsOuter tube-outer shroud temperature detector surveys device detection
The outdoor environment temperature T arrivedOuter shroud>=to fixed difference difference TThe temperature difference, then control device and control the commutation of coolant reversing arrangement.
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Application publication date: 20160928 |