CN104807113B - A kind of air conditioner outdoor machine defrosting decision method - Google Patents
A kind of air conditioner outdoor machine defrosting decision method Download PDFInfo
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- CN104807113B CN104807113B CN201510222077.8A CN201510222077A CN104807113B CN 104807113 B CN104807113 B CN 104807113B CN 201510222077 A CN201510222077 A CN 201510222077A CN 104807113 B CN104807113 B CN 104807113B
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- 238000010257 thawing Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000008859 change Effects 0.000 claims abstract description 53
- 238000001816 cooling Methods 0.000 claims abstract description 53
- 238000001514 detection method Methods 0.000 claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 238000004378 air conditioning Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 18
- 206010008190 Cerebrovascular accident Diseases 0.000 claims description 10
- 208000006011 Stroke Diseases 0.000 claims description 10
- 230000005494 condensation Effects 0.000 claims description 7
- 238000009833 condensation Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005057 refrigeration Methods 0.000 abstract description 3
- 239000003507 refrigerant Substances 0.000 description 12
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
-
- 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
- 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
-
- 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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- 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
- F24F11/30—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
- 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
- F24F11/42—Defrosting; Preventing freezing of outdoor units
-
- 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
- F24F11/65—Electronic processing for selecting an operating mode
-
- 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
- F24F2110/30—Velocity
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to vapour compression machine field of Refrigeration and Air-conditioning, more particularly to a kind of air conditioner outdoor machine defrosting decision method.The present invention increases an anemobiagraph for being used for detection air port wind speed in air-conditioner outdoor unit, the situation of change of air conditioner outdoor machine defrosting decision-making system combination wind speed and the pipe temperature of outdoor air cooling heat exchanger come judge outdoor air cooling heat exchanger whether frosting, and the state for controlling defrosting to switch is defrosted, improve the accuracy that system judges defrosting, accomplish there is white defrost, frostless not defrost, the defrost cycle can not only be extended to greatest extent, reduce influence of the air conditioner defrosting process to indoor air temperature, and improve the usage comfort of user and the heating effect of air-conditioning.
Description
Technical field
The present invention relates to vapour compression machine field of Refrigeration and Air-conditioning, more particularly to a kind of air conditioner outdoor machine defrosting decision method.
Background technology
The compression-type refrigerating system of general air-conditioning is made up of compressor, condenser, evaporator and restricting element etc., by pipe
Road fills appropriate refrigerant according to certain composition closed system that is linked in sequence in closed system, in the presence of compressor,
Refrigerant comes out condensed device, evaporator and throttle structure from compressor and comes back to compressor, and heat is accompanied by refrigerant
Mobile and mobile, realize the process of refrigerastion to be absorbed heat from evaporator to condenser heat rejection.
When air-conditioning system heats, heat is sent to interior by system from outdoor, and outdoor unit heat exchanger serves as evaporator, if
The temperature of outdoor air is relatively low and when humidity is higher, and the water vapour in air will be condensed on outdoor heat exchanger surface and frosting.Room
The frosting of external heat exchanger increases the heat transfer resistance between outdoor heat exchanger surface and air, adds air-flow and passes through outdoor heat exchanger
When flow resistance so that reduced by the air mass flow of outdoor heat exchanger, heat exchange efficiency substantially reduces, and not only influences indoor relax
Adaptive, and cause system energy efficiency to decline.In order to prevent this phenomenon, outdoor heat exchanger frost amount exceeded it is a certain amount of
When, it is necessary to melt the frost of outdoor heat exchanger by defrosting operating, it is flowed down and is discharged outside machine.At present, most of producers
Way is all set time defrost, at low ambient temperatures, carries out judging whether to tie according to outdoor heat exchanger pipe temperature
Frost, but actual under worst cold case, outdoor heat exchanger not necessarily can frosting, if judged according to pipe temperature, will result in erroneous judgement,
Increase defrost number, and usually require, using compressor as thermal source, to make to come from into kind of refrigeration cycle by heating cyclic switching during defrost
The high-temperature gas cold-producing medium stream of compressor, which enters, carries out defrost in outdoor heat exchanger, so as to cause indoor temperature significantly to decline, and
And the time that room temperature reaches needed for design temperature is elongated, the comfortableness that user uses is had a greatly reduced quality.Therefore, make to improve user
With comfortableness, the defrost cycle should be extended as far as possible, defrost number is reduced, accomplish there is white defrost, frostless not defrost, how accurately to sentence
Determining system, whether frosting is crucial.
The content of the invention
The technical problems to be solved by the invention be to provide a kind of air-conditioner outdoor unit, air conditioner outdoor machine defrosting decision-making system with
And method, solve prior art defrost often, reduce user's comfort and the increased technical problem of power consumption.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of air-conditioner outdoor unit, including compressor 1, four-way
Valve, outdoor fan, outdoor air cooling heat exchanger, the first outdoor unit stop valve, the second outdoor unit stop valve, pipe temperature detection means and wind
Speed detector,
The compressor includes exhaust outlet and gas returning port；
The four-way valve includes exhaust port D, condensation port C, evaporator port E and air-breathing pipe port S, the exhaust end
The exhaust outlet of the mouth D connections compressor；
The outdoor air cooling heat exchanger arrival end connects the four-way valve condensation port C, and the port of export connects first Room
Outer machine stop valve；Outdoor fan is provided with the outdoor air cooling heat exchanger, is provided with and is used at the outdoor fan air outlet
Gather the wind speed detection device of the outdoor fan air outlet wind speed；
The second outdoor unit stop valve connects the evaporator port E of the four-way valve；
The pipe temperature detection means is arranged on the outdoor air cooling heat exchanger port of export and the four-way valve air-breathing pipe port S
Between, for gathering the Guan Wen of the outdoor air cooling heat exchanger.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, in addition to gas-liquid separator, the gas-liquid separator arrival end connect the four-way valve air-breathing pipe end
Mouth S, the port of export connect the gas returning port of the compressor.
Further, it is provided with electronics between the outdoor air cooling heat exchanger port of export and the first outdoor unit stop valve
Throttle part.
Further, the electronic throttle part is capillary, electric expansion valve or heating power expansion valve.
Further, the wind speed detection device is anemobiagraph；The pipe temperature detection means is temperature sensor, the temperature
Degree sensor is thermistor.
Further, the first outdoor unit stop valve is liquid side stop valve；The second outdoor unit stop valve is gas
Side stop valve.
A kind of air conditioner outdoor machine defrosting decision-making system, including the air-conditioner outdoor unit, in addition to processor, the processor
Input connects the pipe temperature detection means and wind speed detection device, output end connection defrosting switch, and the processor is used to connect
Receive the outdoor that the pipe temperature T for the outdoor air cooling heat exchanger that the pipe temperature detection means collects and the wind speed detection device collect
The wind speed of fan outlet, according to the wind speed change of pipe temperature T and default pipe temperature threshold value Ts size, and outdoor fan air outlet
Value and the size of wind speed change threshold are handled to judge whether to defrosting, and the state for controlling defrosting to switch.
Further, the processor includes timing unit, collecting unit, setup unit and judging unit,
The timing unit is used for the heating operation time T1 for calculating air-conditioner outdoor unit；
The collecting unit is used to gathering the pipe temperature T for the outdoor air cooling heat exchanger that the pipe temperature detection means is sent, described
The wind speed of outdoor fan air outlet and/or the blower fan gear of the outdoor fan that wind speed detection device is sent；
The setup unit is used for the wind speed change for setting the pipe temperature threshold value Ts of outdoor air cooling heat exchanger, outdoor fan air outlet
Change threshold value C scope and heating operation time T1；
The judging unit is used for size, the outdoor of the pipe temperature T and pipe temperature threshold value Ts than air cooling heat exchanger than outdoor
The wind speed changing value of fan outlet and wind speed change threshold C size and the blower fan gear change feelings of the outdoor fan
Condition, and will determine that result is sent to the defrosting switch.
A kind of air conditioner outdoor machine defrosting decision method, using the air conditioner outdoor machine defrosting decision-making system, including following step
Suddenly：
Step 1, wind speed setting change threshold C scope, outdoor air cooling heat exchanger pipe temperature threshold value Ts and heating operation when
Between T1；
Step 2, outdoor fan 3 is selected suitable gear according to outdoor environment temperature and heated；
Step 3, the moment of pipe temperature detection means 6 gathers the pipe temperature T of outdoor air cooling heat exchanger, and in heating operation time T1
It is interior, pipe temperature T and default pipe temperature threshold value Ts size are persistently judged, if pipe temperature T continues the T1 times and is less than pipe temperature threshold value Ts, and room
The blower fan gear of outer blower fan 3 keeps constant, then the wind speed A in outdoor fan exit when collection heating operation time T1 starts,
The wind speed B in the outdoor fan exit at the end of heating operation time T1 and the outdoor fan in the T1 periods
3 blower fan gear；
Step 4, according to the blower fan gear of the outdoor fan 3, wind is selected in the range of default wind speed change threshold C
Fast change threshold C, wind speed A and wind speed B difference and wind speed change threshold C size are judged, if wind speed A and wind speed B difference
More than wind speed change threshold C, then the frosting of outdoor air cooling heat exchanger 4 of air-conditioner outdoor unit is judged, into step 5；If wind speed A and
Wind speed B difference is not more than wind speed change threshold C, then judges that the outdoor air cooling heat exchanger 4 of air-conditioner outdoor unit does not have frosting, air-conditioning
Continue to run with；
Step 5, start defrost, until detecting default stopping defrost condition, exit defrost, and enter step 1, so
Circulation.
Further, the step 3 is specially：
Step 301, it is per second to gather once the pipe temperature T of outdoor air cooling heat exchanger, and judge pipe temperature T and default pipe temperature threshold value
Ts size, if pipe temperature T is not less than pipe temperature threshold value Ts, air-conditioner outdoor unit continues normal operation；If pipe temperature T is less than pipe temperature threshold value
Ts, then the blower fan gear recorded now is the first blower fan gear, and the wind speed for gathering outdoor fan exit is designated as wind speed A, enters
Enter step 302；
Step 302, beginning timing, the pipe temperature T per second for gathering once outdoor air cooling heat exchanger, and in the T1 periods
It is interior, persistently judge whether pipe temperature T is less than pipe temperature threshold value Ts, if it is not, then when judging pipe temperature T again less than pipe temperature threshold value Ts, weight
It is new to start timing；If so, then enter step 303；
Step 303, at the end of the T1 times, now blower fan gear is designated as the second blower fan gear for collection, and collection is outdoor
Wind speed at fan outlet is designated as wind speed B, and judges whether the first blower fan gear and the second blower fan gear are identical, if identical,
Calculate wind speed A and wind speed B difference；If differing, the second blower fan gear and wind speed B are recorded as newly again respectively
The first blower fan gear and wind speed A, and repeat step 302.
Further, the span of the pipe temperature threshold value Ts is -13 DEG C≤Ts≤2 DEG C；Heating operation time T1
Span be 40min≤T1≤120min；The span of the wind speed change threshold C is 0.1m/s≤C≤0.5m/s.
Further, the blower fan gear includes low wind shelves, apoplexy shelves and high wind shelves；The low wind shelves correspond to wind speed change
Threshold value C span is 0.1m/s≤C ＜ 0.2m/s, and the span that the apoplexy shelves correspond to wind speed change threshold C is
0.2m/s≤C ＜ 0.3m/s, the span that the high wind shelves correspond to wind speed change threshold C are 0.3m/s≤C≤0.4m/s；
Or it is 0.1m/s≤C ＜ 0.3m/s that the low wind shelves, which correspond to wind speed change threshold C span, the apoplexy
The corresponding wind speed change threshold C of shelves span is 0.3m/s≤C ＜ 0.4m/s, and the high wind shelves correspond to wind speed change threshold C
Span be 0.4m/s≤C≤0.5m/s；
Or it is 0.1m/s≤C ＜ 0.2m/s that the low wind shelves, which correspond to wind speed change threshold C span, the apoplexy
The corresponding wind speed change threshold C of shelves span is 0.2m/s≤C ＜ 0.35m/s, and the high wind shelves correspond to wind speed change threshold C
Span be 0.35m/s≤C≤0.5m/s.
The beneficial effects of the invention are as follows：The present invention increases the wind for being used for detection air port wind speed in air-conditioner outdoor unit
Fast instrument, the situation of change of air conditioner outdoor machine defrosting decision-making system combination wind speed and the pipe temperature of outdoor air cooling heat exchanger judge outdoor
Air cooling heat exchanger whether frosting, and control defrosting switch state defrosted, improve system judge defrosting accuracy, do
To there is white defrost, frostless not defrost, the defrost cycle can not only be extended to greatest extent, reduce air conditioner and defrost process to Interior Space
The influence of temperature degree, and improve the usage comfort of user and the heating effect of air-conditioning.
Brief description of the drawings
Fig. 1 is the system construction drawing of air-conditioner outdoor unit of the present invention；
Fig. 2 is air conditioner outdoor machine defrosting decision-making system structure chart of the present invention；
Fig. 3 is the flow chart of air conditioner outdoor machine defrosting decision method of the present invention；
In accompanying drawing, the list of parts representated by each label is as follows：
1st, compressor, 2, four-way valve, 3, outdoor fan, 4, outdoor air cooling heat exchanger, 5, electronic throttle part, 6, pipe temperature detector
Survey device, 7, gas-liquid separator, the 8, first outdoor unit stop valve, the 9, second outdoor unit stop valve, 10, wind speed detection device.
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
As shown in figure 1, be the system construction drawing of the present embodiment air-conditioner outdoor unit, including compressor 1, four-way valve 2, outdoor wind
Machine 3, outdoor air cooling heat exchanger 4, electronic throttle part 5, gas-liquid separator 7, the first outdoor unit stop valve 8, the second outdoor unit are cut
Only valve 9, pipe temperature detection means 6 and wind speed detection device 10, in the present embodiment, the first outdoor unit stop valve 8 is liquid side stop valve,
It 9 is gas side stop valve that the second outdoor unit stop valve, which is, and the wind speed detection device 10 is anemobiagraph, and the pipe temperature detector surveys dress
It is temperature sensor to put 6, and the temperature sensor is thermistor.The temperature sensor of the present embodiment can be that processor is carried out
Whether the judgement of execution defrosting operation provides accurate data foundation, so as to ensure that the accuracy of system defrosting judgement, and it is hot
Quick resistance has the advantages that small volume, high sensitivity, stability is good, easy processing shaping, and TEMP is used as using thermistor
The Guan Wen of device sensing chamber exogenous wind cold heat exchanger, it can effectively ensure the accuracy of testing result.
In the present embodiment, the compressor 1 includes exhaust outlet and gas returning port, and refrigerant is sucked into compressor 1 by gas returning port
Compression chamber in and compressed in the compression chamber, become the cold media gas of HTHP, then pass through the exhaust outlet of compressor 1 and arrange
Go out compressor 1；The four-way valve 2 includes exhaust port D, condensation port C, evaporator port E and air-breathing pipe port S, the row
The exhaust outlet of the gas port D connections compressor 1；The arrival end of outdoor air cooling heat exchanger 4 connects the condensation end of four-way valve 2
Mouth C, the port of export connect the first outdoor unit stop valve 8；Outdoor fan 3 is provided with the outdoor air cooling heat exchanger 4, it is described
The anemobiagraph for gathering the outdoor fan air outlet wind speed is provided with the air outlet of outdoor fan 3；The gas-liquid separator 7
Arrival end connects the air-breathing pipe port S of four-way valve 2, and the port of export connects the gas returning port of the compressor 1；The outdoor is air-cooled to be changed
Electronic throttle part 5 is provided between the hot port of export of device 4 and the first outdoor unit stop valve 8；The second outdoor unit cut-off
Valve 9 connects the evaporator port E of the four-way valve 2；The temperature sensor is arranged on the port of export of outdoor air cooling heat exchanger 4
Between the air-breathing pipe port S of four-way valve 2, for gathering the Guan Wen of the outdoor air cooling heat exchanger 4.In the present embodiment, institute
It is heating power expansion valve to state electronic throttle part 5, in other embodiments, the electronic throttle part 5 can also be capillary or
Electric expansion valve.Either electric expansion valve or heating power expansion valve have good throttling action to capillary, wherein, electronic expansion
The aperture of valve and heating power expansion valve can be as needed degree of supercooling control, and the production cost of capillary it is low, assembling it is simple and convenient.
In the present embodiment, gas coolant can be separated with liquid refrigerants using gas-liquid separator, prevent that liquid refrigerants is compressed
The air inlet pipe of machine enters, and causes the phenomenon of liquid refrigerants liquid hazards compressor, so as to improve the work of this air-conditioner outdoor unit
Make reliability.
It is to be appreciated that exhaust outlet is connected with exhaust port D and should broadly understood here, you can be not direct phase
Even, such as in one embodiment of the invention, oil eliminator (not shown) is additionally provided between exhaust outlet and exhaust port D,
That is, the exhaust outlet of compressor 1 is indirectly connected by the exhaust port D of oil eliminator and four-way valve 2.Wherein, it is oily
Separator has been prior art, therefore here just without being described in detail.
When air-conditioner outdoor unit, which heats, to be run, after refrigerant is compressed in compressor 1, the exhaust outlet through compressor 1 enters
The DE conductings of four-way valve 2, now four-way valve 2, the refrigerant after compression is after the evaporator port E discharges of four-way valve by second Room
Cut after the outflow of outer machine stop valve 9, i.e. gas side stop valve after the condensation of indoor set heat exchanger (not shown) from the first outdoor unit
Only valve 8, i.e. liquid side stop valve return to electronic throttle part 5, and throttle into low-pressure liquid refrigerant by electronic throttle part 5 and enter
Outdoor air cooling heat exchanger 3 is exchanged heat, and the low-pressure gaseous refrigerant after evaporation is entering four-way valve 2, and now the CS of four-way valve 2 is led
Logical, low-pressure gaseous refrigerant enters gas-liquid separator 7 from the air-breathing pipe port S of four-way valve 2, and separates through gas-liquid separator 7 laggard
Enter the gas returning port of compressor 1, complete once heating circulation.
As shown in Fig. 2 be a kind of air conditioner outdoor machine defrosting decision-making system of the embodiment of the present invention, including the sky in accompanying drawing 1
Outdoor unit and processor are adjusted, the processor input connects the pipe temperature detection means 6 and wind speed detection device 10, output end
Connection defrosting switch, the processor are used for the pipe temperature T for receiving the outdoor air cooling heat exchanger that the pipe temperature detection means 6 collects
The wind speed of the outdoor fan air outlet collected with the wind speed detection device 10, according to pipe temperature T's and default pipe temperature threshold value Ts
Size, and the wind speed changing value of outdoor fan air outlet are judged whether at defrosting with the size of wind speed change threshold
Reason, and the state for controlling defrosting to switch.
In the present embodiment, the processor includes timing unit, collecting unit, setup unit and judging unit, the meter
Shi Danyuan is used for the heating operation time T1 for calculating air-conditioner outdoor unit；The collecting unit is used to gather the pipe temperature detection means
The wind speed for the outdoor fan air outlet that the 6 pipe temperature T of outdoor air cooling heat exchangers sent, the wind speed detection device 10 are sent and/
Or the blower fan gear of the outdoor fan 3；The setup unit is used for pipe temperature threshold value Ts, the outdoor for setting outdoor air cooling heat exchanger
The wind speed change threshold C of fan outlet scope and heating operation time T1；The judging unit is used for than than outdoor
The pipe temperature T and pipe temperature threshold value Ts size of air cooling heat exchanger, the wind speed changing value of the outdoor fan air outlet and wind speed change
The blower fan gear change situation of threshold value C size and the outdoor fan 3, and will determine that result is sent to the defrosting and opened
Close.
As shown in figure 3, it is a kind of air conditioner outdoor machine defrosting decision method of the embodiment of the present invention, using above-mentioned air conditioning chamber
Outer machine defrosting decision-making system, comprises the following steps：
Step 1, set the pipe temperature threshold value Ts of outdoor air cooling heat exchanger as 0 DEG C, heating operation time T1 be 40min, wind speed
Change threshold C scopes are 0.1m/s≤C≤0.5m/s；
Step 2, outdoor fan 3 is selected high wind gear according to outdoor environment temperature and heated；
Step 301, it is per second to gather once the pipe temperature T of outdoor air cooling heat exchanger, and judge pipe temperature T and Guan Wen set in advance
Threshold value Ts size；If pipe temperature T is not less than 0 DEG C, air-conditioner outdoor unit continues normal operation；If pipe temperature T is less than 0 DEG C, record
High wind gear now is the first blower fan gear, and the wind speed for gathering outdoor fan exit is designated as wind speed A, into step 302；
Step 302, start timing, the pipe temperature T of collection once outdoor air cooling heat exchanger per second, and judge pipe temperature T whether
Continuously less than 0 DEG C in 40min, if it is not, then restarting timing when judging pipe temperature T again less than 0 DEG C；If so, then enter step
Rapid 303；
Step 303, the outdoor fan gear at the end of collection 40min is designated as the second blower fan gear, outdoor fan exit
Wind speed be designated as wind speed B, and judge whether the first blower fan gear and the second blower fan gear identical, if identical, calculate wind speed A
With wind speed B difference, in the present embodiment, the first blower fan gear and the second blower fan gear are high wind gear；, will if differing
The second blower fan gear and wind speed B are recorded as new the first blower fan gear and wind speed A, and repeat step 302 again respectively；
Step 4, according to the high wind gear of the outdoor fan 3, it is 0.45m/s to select wind speed change threshold C, judges wind speed
A and wind speed B difference and 0.45m/s size, if wind speed A and wind speed B difference are more than 0.45m/s, judge outside air conditioning chamber
The frosting of outdoor air cooling heat exchanger 4 of machine, into step 5；If wind speed A and wind speed B difference are not more than 0.45m/s, judge
The outdoor air cooling heat exchanger 4 of air-conditioner outdoor unit does not have frosting, and air-conditioning continues to run with；
Step 5, start defrost, until detecting that outdoor air cooling heat exchanger pipe temperature T is more than or equal to 15 DEG C, exit defrost.This
In embodiment, default stopping defrost condition is that outdoor air cooling heat exchanger pipe temperature T is more than or equal to 15 DEG C.
In the present embodiment, pipe temperature detection means 6 is temperature sensor, and the acquisition interval of temperature sensor is 1 second, so
The pipe temperature T of outdoor air cooling heat exchanger can be not only monitored constantly, and temperature sensor is sent out by detecting voltage and resistance signal
Mainboard control chip is sent to, is converted into what the process of temperature value hardly consumed energy, power consumption will not be increased.In order to ensure heat exchanger
Efficiency and heating effect, it is necessary to rationally set pipe temperature threshold value Ts and detect wind speed B when heating operation time T1, ordinary circumstance
Under, Ts is lower, and T1 should be shorter, and Ts is set as 0 DEG C in the present embodiment, and T1 is set as 40min, in other embodiments, according to
Actual conditions, such as the gear of outdoor fan, environment temperature etc., Ts can be set as -13 DEG C, 2 DEG C, 5 DEG C, 0 DEG C and -13 DEG C
Arbitrary value between~2 DEG C, and T1 is according to Ts value, can be 40min, 60min, 80min, 120min and 40min~
Arbitrary value between 120min.
In the present embodiment, when being compared judgement, wind speed change threshold C is relevant with blower fan gear, and blower fan gear is low, then C
It is worth relatively low；Blower fan gear is high, then C values are higher.Wind speed change threshold C scope can be preset, such as in above-described embodiment
C value spans are set between 0.1m/s~0.5m/s, judging unit is when judging, according to the blower fan gear collected, in C
Suitable C values are selected to be judged in the range of value.
In other embodiments, C value range sizes corresponding to different blower fan gears can also be preset, such as table 1 below, table
2nd, it is C value scopes corresponding to different blower fan gears shown in table 3.Judging unit is when judging, according to the blower fan gear collected,
Judged selecting suitable C values corresponding to following table in the range of C values.
The first the blower fan gear of table 1 and wind speed change threshold C corresponding tables
| Wind shelves | C value scopes |
| Low wind shelves | 0.1m/s≤C ＜ 0.2m/s |
| Apoplexy shelves | 0.2m/s≤C ＜ 0.3m/s |
| High wind shelves | 0.3m/s≤C≤0.4m/s |
Second of the blower fan gear of table 2 and wind speed change threshold C corresponding tables
| Wind shelves | C value scopes |
| Low wind shelves | 0.1m/s≤C ＜ 0.3m/s |
| Apoplexy shelves | 0.3m/s≤C ＜ 0.4m/s |
| High wind shelves | 0.4m/s≤C≤0.5m/s |
The third blower fan gear of table 3 and wind speed change threshold C corresponding tables
The present invention increases an anemobiagraph for being used for detection air port wind speed, air conditioner outdoor machine defrosting in air-conditioner outdoor unit
The situation of change of decision-making system combination wind speed and the pipe temperature of outdoor air cooling heat exchanger come judge outdoor air cooling heat exchanger whether frosting,
And the state for controlling defrosting to switch is defrosted, the accuracy that system judges defrosting is improved, accomplishes there is white defrost, it is frostless not change
Frost, the defrost cycle can not only be extended to greatest extent, reduce influence of the air conditioner defrosting process to indoor air temperature, Er Qieti
The high usage comfort of user and the heating effect of air-conditioning.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (8)
- A kind of 1. air conditioner outdoor machine defrosting decision method, it is characterised in that using air conditioner outdoor machine defrosting decision-making system, the sky Adjust outdoor unit defrosting decision-making system to include air-conditioner outdoor unit and processor, the processor input connecting tube temperature detection means with Wind speed detection device, the processor output end connection defrosting switch, the air conditioner outdoor machine defrosting decision method includes following Step：Step 1, the scope of the processor wind speed setting change threshold C, the pipe temperature threshold value Ts of outdoor air cooling heat exchanger and heating Running time T 1；Step 2, outdoor fan is selected suitable gear according to outdoor environment temperature and heated；Step 3, the pipe temperature detection means moment gathers the pipe temperature T of outdoor air cooling heat exchanger, and in heating operation time T1, it is described Processor persistently judges pipe temperature T and default pipe temperature threshold value Ts size, if pipe temperature T continues the T1 times and is less than pipe temperature threshold value Ts, And the blower fan gear of outdoor fan keeps constant, then the wind speed in outdoor fan exit when heating operation time T1 starts is gathered The wind speed B in the outdoor fan exit at the end of A, heating operation time T1 and the outdoor wind in the T1 periods The blower fan gear of machine；Step 4, according to the blower fan gear of the outdoor fan, wind speed is selected to become in the range of default wind speed change threshold C Change threshold value C, the processor judges wind speed A and wind speed B difference and wind speed change threshold C size, if wind speed A and wind speed B Difference be more than wind speed change threshold C, then judge air-conditioner outdoor unit the frosting of outdoor air cooling heat exchanger, into step 5；If wind Fast A and wind speed B difference is not more than wind speed change threshold C, then judges that the outdoor air cooling heat exchanger of air-conditioner outdoor unit does not have frosting, Air-conditioning continues to run with；Step 5, start defrost, until detecting default stopping defrost condition, exit defrost, and enter step 1, so follow Ring.
- 2. air conditioner outdoor machine defrosting decision method according to claim 1, it is characterised in that：The step 3 is specially：Step 301, it is per second to gather once the pipe temperature T of outdoor air cooling heat exchanger, and judge pipe temperature T's and default pipe temperature threshold value Ts Size, if pipe temperature T is not less than pipe temperature threshold value Ts, air-conditioner outdoor unit continues normal operation；If pipe temperature T is less than pipe temperature threshold value Ts, The blower fan gear then recorded now is the first blower fan gear, and the wind speed for gathering outdoor fan exit is designated as wind speed A, into step Rapid 302；Step 302, timing is started, it is per second to gather once the pipe temperature T of outdoor air cooling heat exchanger, and within the T1 periods, hold It is continuous to judge whether pipe temperature T is less than pipe temperature threshold value Ts, if it is not, then restarting when judging pipe temperature T again less than pipe temperature threshold value Ts Timing；If so, then enter step 303；Step 303, at the end of the T1 times, now blower fan gear is designated as the second blower fan gear for collection, gathers outdoor fan The wind speed in exit is designated as wind speed B, and judges whether the first blower fan gear and the second blower fan gear are identical, if identical, calculate Go out wind speed A and wind speed B difference；If differing, the second blower fan gear and wind speed B are recorded as new again respectively One blower fan gear and wind speed A, and repeat step 302.
- 3. air conditioner outdoor machine defrosting decision method according to claim 1 or 2, it is characterised in that：The pipe temperature threshold value Ts Span be -13 DEG C≤Ts≤2 DEG C；The span of heating operation time T1 is 40min≤T1≤120min；Institute The span for stating wind speed change threshold C is 0.1m/s≤C≤0.5m/s.
- 4. air conditioner outdoor machine defrosting decision method according to claim 3, it is characterised in that：The blower fan gear includes low Wind shelves, apoplexy shelves and high wind shelves；The span that the low wind shelves correspond to wind speed change threshold C is 0.1m/s≤C ＜ 0.2m/s, The span that the apoplexy shelves correspond to wind speed change threshold C is 0.2m/s≤C ＜ 0.3m/s, and the high wind shelves correspond to wind speed change The span for changing threshold value C is 0.3m/s≤C≤0.4m/s；Or it is 0.1m/s≤C ＜ 0.3m/s that the low wind shelves, which correspond to wind speed change threshold C span, the apoplexy shelves are right The span for answering wind speed change threshold C is 0.3m/s≤C ＜ 0.4m/s, and the high wind shelves correspond to taking for wind speed change threshold C Value scope is 0.4m/s≤C≤0.5m/s；Or it is 0.1m/s≤C ＜ 0.2m/s that the low wind shelves, which correspond to wind speed change threshold C span, the apoplexy shelves are right The span for answering wind speed change threshold C is 0.2m/s≤C ＜ 0.35m/s, and the high wind shelves correspond to taking for wind speed change threshold C Value scope is 0.35m/s≤C≤0.5m/s.
- 5. air conditioner outdoor machine defrosting decision method according to claim 4, it is characterised in that：The air-conditioner outdoor unit includes Compressor (1), four-way valve (2), outdoor fan (3), outdoor air cooling heat exchanger (4), the first outdoor unit stop valve (8), second Room Outer machine stop valve (9), pipe temperature detection means (6) and wind speed detection device (10),The compressor (1) includes exhaust outlet and gas returning port；The four-way valve (2) includes exhaust port D, condensation port C, evaporator port E and air-breathing pipe port S, the exhaust end The exhaust outlet of the mouth D connections compressor (1)；Outdoor air cooling heat exchanger (4) arrival end connects four-way valve (2) the condensation port C, port of export connection described first Outdoor unit stop valve (8)；Outdoor fan (3), outdoor fan (3) air-out are provided with the outdoor air cooling heat exchanger (4) The wind speed detection device (10) for gathering the outdoor fan air outlet wind speed is provided with mouthful；The second outdoor unit stop valve (9) connects the evaporator port E of the four-way valve (2)；The pipe temperature detection means (6) is arranged on outdoor air cooling heat exchanger (4) port of export and the four-way valve (2) air intake duct Between the S of port, for gathering the Guan Wen of the outdoor air cooling heat exchanger (4).
- 6. air conditioner outdoor machine defrosting decision method according to claim 5, it is characterised in that：The air-conditioner outdoor unit also wraps Gas-liquid separator (7) is included, gas-liquid separator (7) arrival end connects four-way valve (2) the air-breathing pipe port S, and the port of export connects Connect the gas returning port of the compressor (1).
- 7. air conditioner outdoor machine defrosting decision method according to claim 6, it is characterised in that：The outdoor air cooling heat exchanger (4) it is provided with electronic throttle part (5) between the port of export and the first outdoor unit stop valve (8)；The electronic throttle part (5) it is capillary, electric expansion valve or heating power expansion valve.
- 8. air conditioner outdoor machine defrosting decision method according to claim 7, it is characterised in that：The wind speed detection device (10) it is anemobiagraph；The pipe temperature detection means (6) is temperature sensor, and the temperature sensor is thermistor.
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| CN105571245B (en) * | 2016-01-28 | 2017-12-08 | 珠海格力电器股份有限公司 | Air conditioner frosting judgment method and device and air conditioning system |
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| CN112856721A (en) * | 2021-02-26 | 2021-05-28 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner and air conditioner |
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