CN106895621A - Air-conditioning and its control method - Google Patents
Air-conditioning and its control method Download PDFInfo
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- CN106895621A CN106895621A CN201710071697.5A CN201710071697A CN106895621A CN 106895621 A CN106895621 A CN 106895621A CN 201710071697 A CN201710071697 A CN 201710071697A CN 106895621 A CN106895621 A CN 106895621A
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- expansion valve
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- evaporator
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000003507 refrigerant Substances 0.000 claims abstract description 148
- 230000006641 stabilisation Effects 0.000 claims abstract description 24
- 238000011105 stabilization Methods 0.000 claims abstract description 24
- 230000008859 change Effects 0.000 claims abstract description 23
- 230000009467 reduction Effects 0.000 claims description 16
- 230000004907 flux Effects 0.000 claims description 13
- 230000000630 rising effect Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 12
- 239000002826 coolant Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005057 refrigeration Methods 0.000 description 15
- 230000007423 decrease Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000006200 vaporizer Substances 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
- 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
- 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
- F25B2600/2513—Expansion 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
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
-
- 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
- F25B2700/2117—Temperatures of an evaporator
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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 invention provides a kind of air-conditioning and its control method.Wherein, air-conditioning include by evaporator, condenser and compressor set into coolant circulating system.Control method includes：After air-conditioning start, air-conditioning work Preset Time is waited, to cause the temperature stabilization of evaporator refrigerant pipe；Control expansion valve so that the refrigerant exhaust gas temperature change preset temperature of compressor；Detect the temperature changing trend of evaporator refrigerant pipe；Delivery temperature is changed according to temperature changing trend variable expansion valve, to cause that the temperature of evaporator refrigerant pipe keeps stabilization.The method of the present invention constantly corrects compressor exhaust temperature by controlling expansion valve, finally gives a suitable target exhaust temperature.Under the delivery temperature, air-conditioning can both have refrigerating/heating effect higher, while also having energy utilization rate higher.
Description
Technical field
The present invention relates to field of air conditioning, more particularly to a kind of air-conditioning and its control method.
Background technology
Current air-conditioning first detects outdoor temperature after work of starting shooting.The expansion valve of evaporator passes through outdoor environment temperature
Itself aperture is really controlled, under different apertures, compressor frequency value is also differed.One compressor row of compressor frequency correspondence
Temperature degree, by adjusting electronic expansion valve opening, can change compressor frequency, and then can adjust compressor exhaust temperature.
During current air-conditioning work, its compressor frequency and compressor exhaust temperature are set only in accordance with outdoor temperature.
When the timing of outdoor temperature one, even indoor temperature or humidity are different, identical compressor frequency and delivery temperature system are also adopted by
It is cold or heat, it is so clearly irrational.If air-conditioning can not be with suitable delivery temperature refrigerating/heating, in fact it could happen that
Problems with：
When compressor exhaust temperature is too low, the refrigerant in evaporator can evaporate not exclusively, and energy utilization rate is low；As target row
Temperature spends height, and evaporator superheat is serious, influences refrigerating/heating effect.And when humidity is larger indoors, if adjusting not in time
Expansion valve opening, if control compressor exhaust temperature, is also easy to the problems such as blowing water and condensation occur.
The content of the invention
In view of the above problems, it is proposed that the present invention so as to provide one kind overcome above mentioned problem or at least in part solve on
State the air-conditioning and its control method of problem.
The present invention one is further objective is that in order to improve air conditioner refrigeration effect.
The present invention another further objective is that for energy saving.
The present invention another further objective is that the problems such as blowing water and condensation to prevent air-conditioning from occurring.
According to an aspect of the present invention, the invention provides a kind of control method of air-conditioning, air-conditioning include by evaporator,
Condenser and compressor set into coolant circulating system, evaporator is provided with the expansion valve of control cold medium flux, and method includes：It is empty
After tuning to open machine, air-conditioning work Preset Time is waited, to cause the temperature stabilization of evaporator refrigerant pipe；The aperture of expansion valve is controlled,
So that the refrigerant exhaust gas temperature change preset temperature of compressor；Detect the temperature changing trend of evaporator refrigerant pipe；According to temperature
Variation tendency variable expansion valve changes delivery temperature, to cause that the temperature of evaporator refrigerant pipe keeps stabilization.
Alternatively, expansion valve is controlled so that include the step of the refrigerant exhaust gas temperature change preset temperature of compressor：Increase
The aperture of expansion valve, makes delivery temperature reduction preset temperature；Or the aperture of reduction expansion valve, delivery temperature is raised default temperature
Degree.
Alternatively, delivery temperature is changed according to temperature changing trend variable expansion valve, to cause the temperature of evaporator refrigerant pipe
The step that degree keeps stable includes：Judge whether evaporator refrigerant pipe temperature is in rising trend；If so, gradually increasing expansion valve
Aperture, gradually to reduce delivery temperature, until evaporator refrigerant pipe temperature is constant；And if it is not, gradually decrease opening for expansion valve
Degree, to gradually rise delivery temperature, until evaporator refrigerant pipe temperature is constant.
Alternatively, delivery temperature is changed according to temperature changing trend variable expansion valve, to cause the temperature of evaporator refrigerant pipe
Also include after the step of degree holding stabilization：After the scheduled time of interval, the temperature changing trend of evaporator refrigerant pipe is detected again,
And according to the step of temperature changing trend execution variable expansion valve.
Alternatively, preset temperature is 1 to 4 degree Celsius.
According to another aspect of the present invention, present invention also offers a kind of air-conditioning, including：Compressor, for compressed gas
Body refrigerant, the exhaust outlet of compressor is provided with exhaust gas temperature sensor, and exhaust gas temperature sensor is configured to detect the cold of compressor
Matchmaker's delivery temperature；Evaporator, the refrigerant pipe with cooling matchmaker flowing, refrigerant pipe surface is provided with refrigerant pipe temperature sensor, cold
Matchmaker's pipe temperature sensor is configured to detect the temperature of refrigerant pipe；Expansion valve, is arranged at the refrigerant inlet of refrigerant pipe, is configured to lead to
Overregulate itself aperture, the cold medium flux in control refrigerant pipe；Master control borad, is configured to control expansion valve opening so that compressor
Refrigerant exhaust gas temperature change preset temperature；Detect the temperature changing trend of evaporator refrigerant pipe；Adjusted according to temperature changing trend
Section expansion valve changes delivery temperature, to cause that the temperature of evaporator refrigerant pipe keeps stabilization.
Alternatively, master control borad is configured to：Increase the aperture of expansion valve, make delivery temperature reduction preset temperature；Or reduce
The aperture of expansion valve, makes delivery temperature raise preset temperature.
Alternatively, master control borad is configured to：Judge whether evaporator refrigerant pipe temperature is in rising trend；If so, increasing swollen
The aperture of swollen valve, gradually reduces delivery temperature, until evaporator refrigerant pipe temperature is constant；And if it is not, reduce opening for expansion valve
Degree, gradually rises delivery temperature, until evaporator refrigerant pipe temperature is constant.
Alternatively, master control borad is configured to：After the scheduled time of interval, detect that the temperature change of evaporator refrigerant pipe becomes again
Gesture, and according to the step of temperature changing trend execution variable expansion valve.
Alternatively, preset temperature is 1 to 4 degree Celsius.
The invention provides a kind of control method of air-conditioning, air-conditioning include by evaporator, condenser and compressor set into
Coolant circulating system, method includes：After air-conditioning start, air-conditioning work Preset Time is waited, to cause the temperature of evaporator refrigerant pipe
Degree stabilization；Control expansion valve so that the refrigerant exhaust gas temperature change preset temperature of compressor；Detect the temperature of evaporator refrigerant pipe
Variation tendency；Delivery temperature is changed according to temperature changing trend variable expansion valve, to cause that the temperature of evaporator refrigerant pipe keeps
Stabilization.The method of the present invention constantly corrects compressor exhaust temperature by controlling expansion valve, finally gives a suitable target
Delivery temperature.Under the delivery temperature, air-conditioning can both have refrigerating/heating effect higher, while also having energy higher
Source utilization rate.
Further, delivery temperature is changed according to temperature changing trend variable expansion valve, to cause evaporator refrigerant pipe
The step that temperature keeps stable includes：Judge whether evaporator refrigerant pipe temperature is in rising trend；If so, gradually increasing expansion valve
Aperture, gradually to reduce delivery temperature, until evaporator refrigerant pipe temperature is constant；And if it is not, gradually decrease expansion valve
Aperture, to gradually rise delivery temperature, until evaporator refrigerant pipe temperature is constant.Because delivery temperature is according to evaporator refrigerant pipe
Temperature carry out accommodation so that the refrigerating capacity of air-conditioning matches with current indoor humidity and indoor temperature, therefore can be with
The generation of the phenomenons such as water and condensation is blown in reduction.
According to the accompanying drawings to the detailed description of the specific embodiment of the invention, those skilled in the art will be brighter
Of the invention above-mentioned and other purposes, advantages and features.
Brief description of the drawings
Describe some specific embodiments of the invention in detail by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter.
Identical reference denotes same or similar part or part in accompanying drawing.It should be appreciated by those skilled in the art that these
What accompanying drawing was not necessarily drawn to scale.In accompanying drawing：
Fig. 1 is the schematic block diagram of air-conditioning according to an embodiment of the invention；
Fig. 2 is the schematic diagram of the control method of air-conditioning according to an embodiment of the invention；
Fig. 3 is the flow chart of the control method of air-conditioning according to an embodiment of the invention；
Fig. 4 is the flow chart of the control method of air-conditioning in accordance with another embodiment of the present invention.
Specific embodiment
The present embodiment provide firstly a kind of air-conditioning, and Fig. 1 is the schematic frame of air-conditioning according to an embodiment of the invention
Figure.Above-mentioned air-conditioning includes：Coolant circulating system, expansion valve 12 and master control that compressor 20, evaporator 10 and condenser 30 are constituted
Plate 40.
Compressor 20 is used for compressed gas refrigerant.Compressor 20 connects evaporator 10 and condenser 30 respectively, to form system
It is cold/to heat circulation.The indoor set of air-conditioning is provided with evaporator 10, and outdoor unit sets condenser 30.Compressor of air conditioner 20 is typically filled
In outdoor unit.It is cold that refrigerant is sent to higher-pressure region (condenser 30) by compressor 20 after compression from low-pressure area (evaporator 10) extraction
But condense, heat is given out in air by the fin of condenser 30, refrigerant becomes liquid, pressure rise from gaseous state.Liquid
State refrigerant flows to low-pressure area from higher-pressure region again, is ejected into evaporator 10 by capillary, and pressure drop, liquid refrigerants becomes immediately
Into gaseous state, by substantial amounts of heat in the absorption air of evaporator refrigerant pipe 11.So, compressor of air conditioner 20 constantly works, just not
Disconnectedly it is dispersed into air higher-pressure region is then sent through in the heat absorption of low-pressure area one end to refrigerant, plays the work of climate comfort
With.
Compressor 20 includes refrigerant air entry and exhaust outlet, and exhaust outlet is provided with exhaust gas temperature sensor 22, delivery temperature
Sensor 22 is configured to detect the refrigerant delivery temperature of compressor 20.Evaporator 10 has the refrigerant pipe 11 of cooling matchmaker flowing, cold
The surface of matchmaker's pipe 11 is provided with refrigerant pipe temperature sensor 13, and refrigerant pipe temperature sensor 13 is configured to detect the temperature of refrigerant pipe 11
Degree.
Expansion valve 12 is arranged at the refrigerant inlet of refrigerant pipe 11, is configured to, by adjusting itself aperture, control refrigerant pipe
Cold medium flux in 11.Expansion valve 12 is an important component in refrigeration system, is generally mounted to liquid storage cylinder and evaporator 10
Between refrigerant pipe 11.Expansion valve 12 makes the liquid coolant of middle temperature high pressure be throttled by it, and air pressure is reduced rapidly, as low-temp low-pressure
Moist steam, then refrigerant absorb heat in the vaporizer 10 and reach refrigeration.In the present embodiment, the aperture of expansion valve 12
(i.e. the openings of sizes of expansion valve 12) can be adjusted.
Master control borad 40, is configured to control the aperture of expansion valve 12 so that the default temperature of the refrigerant exhaust gas temperature change of compressor 20
Degree；The temperature changing trend of detection evaporator refrigerant pipe 11；Delivery temperature is changed according to temperature changing trend variable expansion valve 12,
To cause that the temperature of evaporator refrigerant pipe 11 keeps stabilization.
In the present embodiment, master control borad 40 is configured to, and increases the aperture of expansion valve 12, makes the default temperature of delivery temperature reduction
Degree；Or the aperture of reduction expansion valve 12, delivery temperature is raised preset temperature.Evaporator refrigerant can be controlled by expansion valve 12
Cold medium flux in pipe 11, while the frequency and delivery temperature of compressor 20 can also change therewith.In general, increasing expansion valve
12 aperture, cold medium flux increases, and delivery temperature can be decreased；Reduce the aperture of expansion valve 12, cold medium flux reduction, exhaust
Temperature can be increased.Above-mentioned preset temperature can be set according to the model of air-conditioning and refrigerating capacity.In the present embodiment, in advance
If temperature can be 1-4 DEG C, preferably 2 DEG C.
In the present embodiment, master control borad 40 is configured to judge whether the temperature of evaporator refrigerant pipe 11 is in rising trend.If
The temperature of refrigerant pipe 11 rises, and illustrates that evaporator 10 is overheated seriously, and cold is insufficient, now, gradually increases opening for expansion valve 12
Degree, lifts cold medium flux, and to increase air conditioner refrigeration effect, at the same time, delivery temperature can be reduced gradually.If the temperature of refrigerant pipe 11
It is still lasting to raise, then to continue to increase the aperture of expansion valve 12, constantly reduce delivery temperature, until the temperature of evaporator refrigerant pipe 11 is not
Raise again, keep constant.If the temperature drop of refrigerant pipe 11, illustrate that the cold that evaporator 10 is provided is superfluous, evaporator refrigerant pipe 11
Not exclusively, this will influence refrigeration to interior refrigerant evaporation, now the appropriate aperture for reducing expansion valve 12, gradually rise exhaust temperature
Degree, until the temperature of evaporator refrigerant pipe 11 is no longer reduced, keeps constant.
In the present embodiment, master control borad 40 is configured to：After the scheduled time of interval, evaporator refrigerant pipe 11 is detected again
Temperature changing trend, and according to the step of temperature changing trend execution variable expansion valve 12.Due in process of refrigerastion, Indoor Temperature
Degree and humidity can change, and indoor institute's chilling requirement/heat can also change, the method for recycling above-mentioned variable expansion valve 12,
So that after the temperature stabilization of refrigerant pipe 11, at interval of the scheduled time, it is necessary to the temperature change of detection evaporator refrigerant pipe 11 becomes again
Gesture, to redefine the aperture of expansion valve 12, to reach preferable refrigeration.
The present embodiment additionally provides a kind of control method of air-conditioning.The method is used to enter one to the aperture of air-conditioning expansion valve 12
The regulation of step, so that obtaining air-conditioning reaches optimal refrigeration.Fig. 2 is the control method of air-conditioning according to an embodiment of the invention
Schematic diagram.The control method includes：
Step S202, after air-conditioning start, waits air-conditioning work Preset Time, to cause the temperature of evaporator refrigerant pipe 11 steady
It is fixed.After air-conditioning is opened, cold medium flux numerical value, the basis of air-conditioning master control borad 40 can be determined according to user's design temperature and outdoor temperature
Above-mentioned cold medium flux numerical value determines the aperture (i.e. the openings of sizes of expansion valve 12) of expansion valve 12.Air-conditioning is in above-mentioned determination expansion valve 12
Aperture during do not account for the factors such as indoor environment humidity, the degree of superheat and the delivery temperature of compressor 20, now refrigerant pipe
11 temperature stabilization is not optimal refrigerating/heating temperature, it is necessary to further regulation.
Step S204, controls expansion valve 12 so that the refrigerant exhaust gas temperature change preset temperature of compressor 20.Expansion valve 12
Cold medium flux can be controlled, after cold medium flux change, the delivery temperature of compressor 20 can also occur respective change.In this implementation
In example, above-mentioned steps can include：Increase the aperture of expansion valve 12, make delivery temperature reduction preset temperature；Or reduce expansion valve
12 aperture, makes delivery temperature raise preset temperature.
Step S206, the temperature changing trend of detection evaporator refrigerant pipe 11.Above-mentioned variation tendency includes：The temperature of refrigerant pipe 11
Degree rises or falls.In the present embodiment, the surface of refrigerant pipe 11 is provided with refrigerant pipe temperature sensor 13, refrigerant pipe TEMP
The surface temperature of 13 real-time monitoring refrigerant pipe of device 11, master control borad 40 receives said temperature data and judges whether the temperature of refrigerant pipe 11 becomes
It is big or diminish.
Step S208, delivery temperature is changed according to temperature changing trend variable expansion valve 12, to cause evaporator refrigerant pipe
11 temperature keeps stabilization.Aperture of the master control borad 40 according to said temperature variation tendency variable expansion valve 12 so that evaporator is cold
The temperature stabilization of matchmaker's pipe 11 is at a suitable temperature.
Fig. 3 is the flow chart of the control method of air-conditioning according to an embodiment of the invention, and the method can be used for air-conditioning
During refrigeration, regulate and control the aperture of expansion valve 12, to reach the purpose of the temperature stabilization of refrigerant pipe 11.The control method performs following successively
Step：
Step S302, after air-conditioning start refrigeration, waits air-conditioning work Preset Time, to cause the temperature of evaporator refrigerant pipe 11
Degree stabilization.Above-mentioned Preset Time can be set according to air conditioner refrigerating operating mode, can be 10 minutes in the present embodiment.
After air-conditioning opens refrigeration 10min, refrigerant pipe temperature sensor 13 detects the temperature of refrigerant pipe 11 and no longer fluctuates, then prove air-conditioning system
Cooling system has reached stable state.It is above-mentioned because aforementioned stable state does not account for the factors such as indoor humidity and refrigerating efficiency
During the aperture of expansion valve 12 stabilization, the delivery temperature of compressor 20 is not reaching to preferable temperature value, it is necessary to further adjustment.
Step S304, increases the aperture of expansion valve 12, makes 2 DEG C of delivery temperature reduction.Found through inventor's many experiments,
Under refrigerating state, delivery temperature when the suitable delivery temperature of compressor 20 is than incipient stability is more high about 2 DEG C, and in refrigeration shape
Under state, delivery temperature is suitably reduced, advantageously reduce the evaporation degree of superheat, improve refrigeration.
Step S306, judges whether the temperature of evaporator refrigerant pipe 11 is in rising trend.
Step S308, if the judged result of step S306 is yes, gradually increases the aperture of expansion valve 12, with the gradually row of reduction
Temperature degree, until the temperature of evaporator refrigerant pipe 11 is constant.In the present embodiment, temperature of the master control borad 40 according to evaporator refrigerant pipe 11
Degree change is finely adjusted to the aperture of expansion valve 12.If the temperature of evaporator refrigerant pipe 11 rises, gradually increase opening for expansion valve 12
Degree, with the gradually reduction of delivery temperature, the ascendant trend of the temperature of refrigerant pipe 11 can slow down.When the temperature of evaporator refrigerant pipe 11
When stablizing again, the cold supply and demand of kind of refrigeration cycle reaches balance, if being further added by the aperture of expansion valve 12, the temperature of the temperature of refrigerant pipe 11
Degree can be reduced on the contrary.Delivery temperature now is the delivery temperature of optimum air conditioner refrigerating, keeps the aperture of expansion valve 12 so that
Air-conditioning is freezed with optimum delivery temperature.
Step S310, if the judged result of step S306 is no, gradually decreases the aperture of expansion valve 12, with the row of gradually rising
Temperature degree, until the temperature of evaporator refrigerant pipe 11 is constant.If the temperature drop of evaporator refrigerant pipe 11, gradually decreases expansion valve 12
Aperture, delivery temperature can gradually rise.With gradually rising for delivery temperature, the downward trend of the temperature of refrigerant pipe 11 can slow down.
When the temperature of evaporator refrigerant pipe 11 is stablized again, the cold supply and demand of kind of refrigeration cycle reaches balance, if reducing expansion valve 12 again
Aperture, the temperature of the temperature of refrigerant pipe 11 can raise on the contrary.Delivery temperature now is the delivery temperature of optimum air conditioner refrigerating,
The aperture for keeping expansion valve 12 current so that air-conditioning is freezed with optimum delivery temperature.
Fig. 4 is the flow chart of the control method of air-conditioning in accordance with another embodiment of the present invention, and the method can be used for sky
During modulation heat, regulate and control the aperture of expansion valve 12, to reach the purpose of the temperature stabilization of refrigerant pipe 11.The control method perform successively with
Lower step：
Step S402, after air-conditioning start is heated, waits air-conditioning work Preset Time, to cause the temperature of evaporator refrigerant pipe 11
Degree stabilization.Above-mentioned Preset Time can be set according to air-conditioning heating operating mode, can be 10 minutes in the present embodiment.
Air-conditioning is opened after heating 10min, and refrigerant pipe temperature sensor 13 detects the temperature of refrigerant pipe 11 and no longer fluctuates, then prove air-conditioning system
Hot systems have reached stable state.
Step S404, increases the aperture of expansion valve 12, delivery temperature is raised 2 DEG C.Found through inventor's many experiments,
Heat under state, delivery temperature when the suitable delivery temperature of compressor 20 is than incipient stability is more low about 2 DEG C, and is heating shape
Under state, delivery temperature is suitably reduced, advantageously reduce the working frequency of compressor 20, being capable of save energy.
Step S406, judges whether the temperature of evaporator refrigerant pipe 11 is in rising trend.
Step S408, if the judged result of step S406 is yes, gradually increases the aperture of expansion valve 12, with the gradually row of reduction
Temperature degree, until the temperature of evaporator refrigerant pipe 11 is constant.In the present embodiment, temperature of the master control borad 40 according to evaporator refrigerant pipe 11
Degree change is finely adjusted to the aperture of expansion valve 12.If the temperature of evaporator refrigerant pipe 11 rises, gradually increase opening for expansion valve 12
Degree, with the gradually reduction of delivery temperature, the ascendant trend of the temperature of refrigerant pipe 11 can slow down.When the temperature of evaporator refrigerant pipe 11
When no longer rising, stablizing again, the cold supply and demand for heating circulation reaches balance, if being further added by the aperture of expansion valve 12, refrigerant pipe
The temperature of 11 temperature can be reduced on the contrary.Delivery temperature now is the delivery temperature of optimum air-conditioning heating, keeps expansion valve 12
Current aperture so that air-conditioning is heated with optimum delivery temperature.
Step S410, if the judged result of step S406 is no, gradually rises the aperture of expansion valve 12, with the row of gradually rising
Temperature degree, until the temperature of evaporator refrigerant pipe 11 is constant.If the temperature drop of evaporator refrigerant pipe 11, gradually decreases expansion valve 12
Aperture, delivery temperature can gradually rise.With gradually rising for delivery temperature, the downward trend of the temperature of refrigerant pipe 11 can slow down.
When the temperature of evaporator refrigerant pipe 11 is stablized again, the cold supply and demand for heating circulation reaches balance, if reducing expansion valve 12 again
Aperture, the temperature of the temperature of refrigerant pipe 11 can raise on the contrary.Delivery temperature now is the delivery temperature of optimum air-conditioning heating,
Keep the aperture of expansion valve 12 so that air-conditioning is heated with optimum delivery temperature.
In the above-mentioned methods, the scheduled time is spaced after refrigerant pipe temperature stabilization, the temperature of evaporator refrigerant pipe 11 is detected again
Degree variation tendency, and according to the step of temperature changing trend execution variable expansion valve 12.Due in process of refrigerastion, indoor temperature
Can be changed with humidity, indoor institute's chilling requirement/heat can also change, the method for recycling above-mentioned variable expansion valve 12 makes
After obtaining the temperature stabilization of refrigerant pipe 11, at interval of the scheduled time, it is necessary to detect the temperature changing trend of evaporator refrigerant pipe 11 again,
To redefine the aperture of expansion valve 12, to reach preferable refrigeration.In the present embodiment, the above-mentioned scheduled time can be
1h。
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple of the invention and show
Example property embodiment, but, without departing from the spirit and scope of the present invention, still can be direct according to present disclosure
It is determined that or deriving many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all these other variations or modifications.
Claims (10)
1. a kind of control method of air-conditioning, the air-conditioning include by evaporator, condenser and compressor set into refrigerant circulation system
System, the evaporator is provided with the expansion valve of control cold medium flux, and methods described includes：
After air-conditioning start, the air-conditioning work Preset Time is waited, to cause the temperature stabilization of the evaporator refrigerant pipe；
Control the aperture of the expansion valve so that the refrigerant exhaust gas temperature change preset temperature of the compressor；
Detect the temperature changing trend of the evaporator refrigerant pipe；And
The expansion valve is adjusted according to the temperature changing trend and changes the delivery temperature, to cause the evaporator refrigerant pipe
Temperature keep stabilization.
2. method according to claim 1, wherein, control the expansion valve so that the refrigerant exhaust temperature of the compressor
The step of degree change preset temperature, includes：
Increase the aperture of the expansion valve, make the delivery temperature reduction preset temperature；Or
The aperture of the expansion valve is reduced, the delivery temperature is raised preset temperature.
3. method according to claim 1, wherein, adjusted according to the temperature changing trend described in the expansion valve changes
Delivery temperature, to cause that the step of temperature holding stabilization of the evaporator refrigerant pipe includes：
Judge whether the evaporator refrigerant pipe temperature is in rising trend；
If so, gradually increase the aperture of the expansion valve, gradually to reduce the delivery temperature, until the evaporator refrigerant pipe
Temperature is constant；And
If it is not, the aperture of the expansion valve is gradually decreased, to gradually rise the delivery temperature, until the evaporator refrigerant pipe
Temperature is constant.
4. according to the method in any one of claims 1 to 3, wherein, according to the temperature changing trend adjust it is described swollen
Swollen valve changes the delivery temperature, with so that also including after the stable step of the temperature holding of the evaporator refrigerant pipe：
After the scheduled time of interval, the temperature changing trend of the evaporator refrigerant pipe is detected again, and according to the temperature change
Trend performs the step of adjusting the expansion valve.
5. according to the method in any one of claims 1 to 3, wherein,
The preset temperature is 1 to 4 degree Celsius.
6. a kind of air-conditioning, including：
Compressor, for compressed gas refrigerant, the exhaust outlet of the compressor is provided with exhaust gas temperature sensor, the exhaust temperature
Refrigerant delivery temperature of the degree sensor configuration into the detection compressor；
Evaporator, the refrigerant pipe with cooling matchmaker flowing, the refrigerant pipe surface is provided with refrigerant pipe temperature sensor, described cold
Matchmaker's pipe temperature sensor is configured to detect the temperature of the refrigerant pipe；
Expansion valve, is arranged at the refrigerant inlet of the refrigerant pipe, is configured to, by adjusting itself aperture, control the refrigerant pipe
Interior cold medium flux；With
Master control borad, is configured to control expansion valve opening so that the refrigerant exhaust gas temperature change preset temperature of compressor；Detection is described
The temperature changing trend of evaporator refrigerant pipe；The expansion valve is adjusted according to the temperature changing trend and changes the exhaust temperature
Degree, to cause that the temperature of the evaporator refrigerant pipe keeps stabilization.
7. air-conditioning according to claim 6, wherein the master control borad is configured to：
Increase the aperture of the expansion valve, make the delivery temperature reduction preset temperature；Or the aperture of the reduction expansion valve, make
The delivery temperature raises preset temperature.
8. air-conditioning according to claim 6, wherein the master control borad is configured to：
Judge whether the evaporator refrigerant pipe temperature is in rising trend；If so, increasing the aperture of the expansion valve, gradually reduce
The delivery temperature, until the evaporator refrigerant pipe temperature is constant；And if it is not, reduce the aperture of the expansion valve, gradually
The delivery temperature is raised, until the evaporator refrigerant pipe temperature is constant.
9. the air-conditioning according to any one of claim 6 to 8, wherein the master control borad is configured to：
After the scheduled time of interval, the temperature changing trend of the evaporator refrigerant pipe is detected again, and according to the temperature change
Trend performs the step of adjusting the expansion valve.
10. the air-conditioning according to any one of claim 6 to 8, wherein,
The preset temperature is 1 to 4 degree Celsius.
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| CN110986333A (en) * | 2019-12-26 | 2020-04-10 | 广东美的制冷设备有限公司 | Control method and device of air conditioner, air conditioner and electronic equipment |
| CN113587408A (en) * | 2021-07-30 | 2021-11-02 | 美的集团武汉暖通设备有限公司 | Multi-split air conditioner, control method thereof and readable storage medium |
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Effective date of registration: 20201030 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Patentee after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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