CN110160228A - The control method and air conditioner of heat pump air conditioner - Google Patents
The control method and air conditioner of heat pump air conditioner Download PDFInfo
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- CN110160228A CN110160228A CN201910394823.XA CN201910394823A CN110160228A CN 110160228 A CN110160228 A CN 110160228A CN 201910394823 A CN201910394823 A CN 201910394823A CN 110160228 A CN110160228 A CN 110160228A
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- China
- Prior art keywords
- air conditioner
- heat pump
- pump air
- temperature
- expansion valve
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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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—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
- 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
- F25B49/022—Compressor control arrangements
-
- 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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/50—Load
-
- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/077—Compressor control units, e.g. terminal boxes, mounted on the compressor casing wall containing for example starter, protection switches or connector contacts
-
- 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
- F25B2500/00—Problems to be solved
- F25B2500/31—Low ambient temperatures
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- 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)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides a kind of control method of heat pump air conditioner and air conditioners, and wherein the control method of heat pump air conditioner includes: starting heat pump air conditioner, to discharge heat using the indoor unit of heat pump air conditioner；Detect the duty parameter of heat pump air conditioner；Judge whether the duty parameter of heat pump air conditioner meets preset extreme operating condition condition；If so, the aperture adjusting range of the electric expansion valve of heat pump air conditioner to be limited to less than to or is equal to default adjustment limit value.For this programme under the extreme operating condition that electronic expansion valve opening is affected to delivery temperature, avoiding the occurrence of electric expansion valve and excessively adjusting causes delivery temperature larger fluctuation occur, ensure that the even running of heat pump system.
Description
Technical field
The present invention relates to airconditioning controls, more particularly to the control method and air conditioner of a kind of heat pump air conditioner.
Background technique
As the requirement to air-conditioning efficiency improves, occur in the prior art using electric expansion valve as refrigeration system
Throttling set.Electric expansion valve can realize variable-flow throttling according to the actual coincidence change conditions of air-conditioning, reach raising air-conditioning
The requirement of efficiency and comfort.
Fig. 1 is the schematic diagram of air conditioner heat pump system in the prior art.Air conditioner in a heating mode, utilizes heat pump principle
It will provide from outdoor draw heat to interior.Also reversal valve 140 is turned into heat pump operating position, is discharged by compressor 110
High pressure refrigerant vapor flows into indoor heat exchanger 120 (being used as condenser) after reversal valve 140, and refrigerant vapour is put when condensing
Latent heat out, room air is heated, and reaches heating of house purpose.Condensed liquid refrigerant flows through throttling set 150
(electric expansion valve) enters outdoor heat exchanger 130 (being used as evaporator), absorbs external heat and evaporates, and the steam after evaporation passes through
It is sucked after reversal valve 140 by compressor 110, completes heating circulation.In this process, the two phase refrigerant in condensation side needs to keep
The pressure of about 2.6-3.0MPa (by taking R410A refrigerant as an example) rejects heat in room air to liquefy, while matching conjunction
Suitable refrigerant flow supply, condensation side is interior to keep a suitable degree of supercooling, that is, can reach the purpose of lasting heating.
In order to meet above-mentioned heat pump job requirement, the aperture regulation of electric expansion valve 150 is very crucial, the prior art
Method is to be loaded to determine target exhaust temperature according to the operating condition of air conditioner, according to target exhaust temperature and actual delivery temperature
Difference is adjusted, so that actual exhaust air temperature is close to target exhaust temperature.However in actual use, this adjusting
Mode is easy to appear delivery temperature under certain operating conditions and fluctuates larger, system fluctuation of service, low when high when leading to leaving air temp,
Affect user experience.
Summary of the invention
It is an object of the present invention to provide a kind of control method of the stable heat pump air conditioner of guarantee leaving air temp with
Air conditioner.
A further object of the present invention is to the excessive adjustment of electric expansion valve to be avoided.
Another further object of the present invention is to the states of heat pump system to be made to be adapted with heat demand load.
According to an aspect of the invention, there is provided a kind of control method of heat pump air conditioner, the control of the heat pump air conditioner
Method processed includes: starting heat pump air conditioner, to discharge heat using the indoor unit of heat pump air conditioner；Detect the work of heat pump air conditioner
Condition parameter；Judge whether the duty parameter of heat pump air conditioner meets preset extreme operating condition condition；If so, by heat pump air conditioner
The aperture adjusting range of electric expansion valve is limited to less than or is equal to default adjustment limit value.
Optionally, after starting heat pump air conditioner further include: determine the target exhaust temperature of the compressor of heat pump air conditioner
Degree；Detect the actual exhaust air temperature of compressor；Using target exhaust temperature as reference quantity, using actual exhaust air temperature as controlled change
It measures and feedback control is carried out to the aperture of electric expansion valve, so that actual exhaust air temperature is close to target exhaust temperature.
Optionally, the duty parameter of heat pump air conditioner includes the environment temperature of the outdoor unit of heat pump air conditioner, and extreme
Working condition include: environment temperature lower than preset low temperature limit value and the difference of actual exhaust air temperature and target exhaust temperature it is small
In fiducial temperature threshold value.
Optionally, judge that the step of whether duty parameter of heat pump air conditioner meets preset extreme operating condition condition includes:
Judge whether environment temperature is lower than preset low temperature limit value；If so, calculating the difference of actual exhaust air temperature and target exhaust temperature
Absolute value, and judge whether absolute value is less than temperature difference threshold；If so, determining that duty parameter meets extreme operating condition condition.
Optionally, in the case where the duty parameter of heat pump air conditioner is unsatisfactory for extreme operating condition condition, to electric expansion valve
Aperture the step of carrying out feedback control include: that feedback control is carried out to the aperture of electric expansion valve using pid control algorithm.
Optionally, the aperture adjusting range of the electric expansion valve of heat pump air conditioner is being limited to less than to or is being equal to default adjust
After whole limit value, during carrying out feedback control to the aperture of electric expansion valve, the aperture adjustment amount of each electric expansion valve
In aperture adjusting range.
Optionally, after the aperture of adjustment electric expansion valve every time further include: detection is pressed again after the setting time of interval
The actual exhaust air temperature of contracting machine and rejudge whether duty parameter meets preset extreme operating condition condition, to carry out subsequent electricity
The aperture of sub- expansion valve adjusts.
Optionally it is determined that the step of target exhaust temperature of the compressor of heat pump air conditioner includes: acquisition heat pump air conditioner
Indoor unit heat demand load；According to heat demand load, target exhaust temperature is set.
Optionally, after starting heat pump air conditioner further include: the heat demand for obtaining the indoor unit of heat pump air conditioner is negative
Lotus；The running frequency of the initial opening of electric expansion valve and the compressor of heat pump air conditioner is set according to heat demand load.
According to another aspect of the present invention, a kind of air conditioner is additionally provided, which includes: heat pump system, is used for
To indoor release heat；Control device comprising processor and memory, memory are stored with control program, control program
For realizing the control method of heat pump air conditioner when being executed by processor.
The control method of heat pump air conditioner of the invention judges the operating condition ginseng of heat pump air conditioner after heat pump system starting
Whether number meets preset extreme operating condition condition, in the extreme operating condition that the aperture of electric expansion valve is affected to delivery temperature
Under, the aperture adjusting range of electric expansion valve is limited, avoiding electric expansion valve from excessively adjusting causes delivery temperature larger wave occur
It is dynamic, it ensure that the even running of heat pump system, so that leaving air temp is stablized.
Further, the control method of heat pump air conditioner of the invention, can according to the duty parameter of heat pump air conditioner with
And the working condition of heat demand load adjustment heat pump system, meet heating and require, and reduces energy consumption.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Detailed description of the invention
Some specific embodiments of the present invention is described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter.
Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached drawing:
Fig. 1 is the schematic diagram of air conditioner heat pump system in the prior art；
Fig. 2 is the functional block diagram of air conditioner according to an embodiment of the invention；
Fig. 3 is the schematic diagram of the control method of heat pump air conditioner according to an embodiment of the invention；
Fig. 4 is the flow chart of an application example of the control method of heat pump air conditioner according to an embodiment of the invention.
Specific embodiment
Fig. 2 is the functional block diagram of air conditioner 10 according to an embodiment of the invention.The air conditioner 10 of the present embodiment is also adopted
With the heat pump system of the prior art to indoor release heat, and pass through the improvement of heat pump system control method, ensure that heat pump
The even running of system 100.
The air conditioner 10 of the present embodiment is additionally provided with control device 200, the control device 200 include processor 210 and
Memory 220, memory 220 is stored with control program, for realizing the present embodiment when control program is executed by processor 210
The control method of heat pump air conditioner.Processor 210 is the data processing centre of control device 200, utilizes various interfaces and route
Control device 200 and execution unit are connected, the processing to all data and signal is realized by the execution to control program
And output.The present embodiment is not defined the concrete type and specification of processor 210 and memory 220, this field skill
Art personnel are easy to according to control program and its realize that function selects specific device.Such as processor 210 can be central processing
Unit (Central Processing Unit, CPU) or other general processors, digital signal processor (Digital
Signal Processor, DSP), specific integrated circuit (Application Specific Integrated Circuit,
ASIC), ready-made programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic
Device, discrete gate or transistor logic, discrete hardware components etc..In another example memory 220 may include that high speed is random
Memory is accessed, nonvolatile memory, such as hard disk, memory, plug-in type hard disk, intelligent memory card (Smart Media are used
Card, SMC), secure digital (Secure Digital, SD) card, flash card (Flash Card), at least one magnetic disk storage
Part, flush memory device or other volatile solid-state parts.
Below in conjunction with the control method of the heat pump air conditioner of the present embodiment, to the function and work of the air conditioner 10 of the present embodiment
It is introduced as principle.Fig. 3 is the schematic diagram of the control method of heat pump air conditioner according to an embodiment of the invention.The heat pump
The control method of air conditioner is primarily adapted for use in the heating mode control using the air conditioner of heat pump system 100, generally may be used
With the following steps are included:
Step S302 starts heat pump air conditioner 10, to discharge heat using the indoor unit of heat pump air conditioner 10.In the heating
Under mode, indoor heat exchanger 120 is used as condenser；And outdoor heat exchanger 130 is used as evaporator.
After the starting heating of heat pump air conditioner 10, the target exhaust temperature of the compressor 110 of heat pump air conditioner 10 is determined；Inspection
The actual exhaust air temperature of measured compressed machine 110；Using target exhaust temperature as reference quantity, using actual exhaust air temperature as controlled variable
Feedback control is carried out to the aperture of electric expansion valve 150, so that actual exhaust air temperature is close to target exhaust temperature.Namely using tune
The mode of whole 150 aperture of electric expansion valve, so that the delivery temperature of compressor 110 is close to target exhaust temperature.
Target exhaust temperature can be configured according to specific heat demand load, such as determine heat pump air conditioner 10
The step of target exhaust temperature of compressor 110 includes: the heat demand load for obtaining the indoor unit of heat pump air conditioner 10；According to
Target exhaust temperature is arranged in heat demand load.Heat demand load can be according to the actual temperature of indoor unit and set temperature
Difference is determining namely heat demand load increases with the difference of actual temperature and set temperature and increased, and correspondingly, can be improved
Target exhaust temperature.
The running frequency of the compressor 110 of the initial opening and heat pump air conditioner 10 of electric expansion valve 150 can also root
It is configured according to heat demand load, such as frequency-changeable compressor, the running frequency of the compressor 110 of heat pump air conditioner 10
It can be set as higher with the increase of heat demand load；And the initial opening of electric expansion valve 150 can also be accordingly arranged.
In another example the initial opening of electric expansion valve 150 can be arranged according to the running frequency of frequency-changeable compressor, so that
Refrigerant flow follows the running frequency corresponding change of frequency-changeable compressor, meets system actual demand, can be avoided frequency conversion compression
There is back the problems such as liquid, oil starvation, excessive pressure ratio in machine, improves the service life of frequency-changeable compressor.
Step S304 detects the duty parameter of heat pump air conditioner 10；The duty parameter of heat pump air conditioner 10 may include but
It is not limited to: running frequency, the environment temperature of outdoor unit, the difference of actual exhaust air temperature and target exhaust temperature of compressor 110
Deng.
Step S306, judges whether the duty parameter of heat pump air conditioner 10 meets preset extreme operating condition condition.By hair
Research of the bright people to 10 operational process of heat pump air conditioner finds the aperture of electric expansion valve 150 under the conditions of certain extreme operating conditions
With the minor modification of delivery temperature and nonlinear correlation namely electric expansion valve 150, delivery temperature may all generated larger
Fluctuation.Therefore PID (ratio (proportion), integral (integral), differential are relied solely in the prior art
(differential)) target exhaust temperature is adjusted, may cause one step of every movement of electric expansion valve 150, it all may be to exhaust
The influence of temperature much increases, and which results in the pass problems that valve is excessive or valve opening is excessive, and then delivery temperature is caused to fluctuate
Larger, system fluctuation of service, machine is easy to appear failure, and it is high when leaving air temp when it is low, influence user experience.
In the present embodiment, extreme operating condition condition can be set to environment temperature lower than preset low temperature limit value, or reality
The difference of delivery temperature and target exhaust temperature is less than the running frequency superelevation of fiducial temperature threshold value or compressor 110,
Under the conditions of there is any extreme operating condition, so that it may modify to the aperture adjustment mode of electric expansion valve 150.
By the research of air conditioner actual use, extreme operating condition condition can preferentially be set as environment temperature in the present embodiment
Lower than preset low temperature limit value and the difference of actual exhaust air temperature and target exhaust temperature is less than fiducial temperature threshold value.Namely
Under outdoor unit environment temperature is lower and the lesser situation of the difference of actual exhaust air temperature and target exhaust temperature, modification electronics is swollen
The aperture adjustment mode of swollen valve 150.Step S306 is specifically as follows: judging whether environment temperature is lower than preset low temperature limit value；
If so, calculating the absolute value of the difference of actual exhaust air temperature and target exhaust temperature, and judge whether absolute value is less than temperature difference threshold
Value；If so, determining that duty parameter meets extreme operating condition condition.
In the case where the duty parameter of heat pump air conditioner 10 is unsatisfactory for extreme operating condition condition, to electric expansion valve 150
The step of aperture progress feedback control includes: to carry out feedback control using aperture of the pid control algorithm to electric expansion valve 150.
Step S308, in the case where duty parameter meets preset extreme operating condition condition, by the electricity of heat pump air conditioner 10
The aperture adjusting range of sub- expansion valve 150 is limited to less than or is equal to default adjustment limit value.Namely meet in duty parameter default
Extreme operating condition condition in the case where (outdoor unit environment temperature is lower and the difference of actual exhaust air temperature and target exhaust temperature
It is smaller), the aperture that 150 each run of electric expansion valve is adjusted is respectively less than or is equal to default adjustment limit value.Due to electric expansion valve
Aperture adjustment is generally carried out by movement step number, therefore the aperture adjusting range of electric expansion valve 150 can be by by electronics
The movement step number of expansion valve 150 is limited in setting step number and is limited.That is, by the movement of each electric expansion valve 150
Step number is limited to be no more than setting step number.
After step S308, during carrying out feedback control to the aperture of electric expansion valve 150, each electronic expansion
The aperture adjustment amount of valve 150 is in the aperture adjusting range.And after the completion of each adjustment, weight after setting time can be spaced
It newly detects the actual exhaust air temperature of compressor 110 and rejudges whether duty parameter meets preset extreme operating condition condition,
To carry out the aperture adjustment of Subsequent electronic expansion valve 150.By periodically detecting judgement, so that electric expansion valve 150 is opened
Degree dynamic adjusts, and meets the horsepower requirements of heat pump system 100.
Above-mentioned each threshold value (the adjustment limit value of the aperture including electric expansion valve 150, electric expansion valve 150 setting step number,
Low temperature limit value, temperature difference threshold) it can be configured according to the operating parameter and use condition of heat pump air conditioner 10, for example (,) it is low
Warm limit value can be set to -10 DEG C to -5 DEG C, be preferably arranged to -7 DEG C, temperature difference threshold can be set to 1 DEG C to 3 DEG C, such as set
It is set to 2 DEG C.The setting step number of the adjustment limit value electric expansion valve 150 of the aperture of electric expansion valve 150 can be set to electronics
The 1% to 3% of 150 aperture of expansion valve, such as it is set as 1%.
Fig. 4 is the flow chart of an application example of the control method of heat pump air conditioner according to an embodiment of the invention,
It illustrates the operational process of the control method for the heat pump air conditioner that the present embodiment is applied in another specific heating operations, the operations
Process includes:
Step S402 is connected to heating enabled instruction, such as can receive user and started using the heating that remote controler is sent
It instructs, can also include the parameters such as target heating temperature, the wind-force requirement of user setting in the heating enabled instruction；
Step S404 obtains the heat demand load of heat pump air conditioner 10, which can be according to target system
Hot temperature and indoor actual temperature determine；
The target exhaust temperature T0 of compressor 110 is arranged according to heat demand load by step S406；
Step S408 detects the environment temperature t of the outdoor unit of heat pump air conditioner 10 and the actual exhaust air temperature of compressor 110
Spend T；
Step S410, judges whether environment temperature t is lower than low temperature limit value t0, such as -7 DEG C；
Step S412 calculates T-T0 if t is lower than low temperature limit value t0；
Step S414, judges whether │ T-T0 │ is less than temperature difference threshold T1, such as 2 DEG C；
Each movement step number of electric expansion valve 150 is limited to less than or is equal to default step number limitation n by step S416；
Step S418 adjusts the aperture of electric expansion valve 150 according to T-T0；
Step S420, if being greater than or equal to the feelings that low temperature limit value t0 or │ T-T0 │ is greater than or equal to temperature difference threshold T1 in t
Under condition, the aperture of electric expansion valve 150 is adjusted using pid control mode using delivery temperature as reference value.
After completing the aperture adjustment of primary electron expansion valve 150, setting time can be spaced and re-execute above-mentioned process,
To realize that dynamic adjusts；So that 100 stable operation of heat pump system.
The control method of the heat pump air conditioner 10 of the present embodiment, under the conditions of extreme operating condition, limitation electric expansion valve 150
Aperture adjusting range.To under the extreme operating condition that aperture is affected to delivery temperature, avoid electric expansion valve 150 from excessively adjusting
It is whole, it avoids delivery temperature from larger fluctuation occur, ensure that the even running of heat pump system 100, so that leaving air temp is stablized, and energy
Enough according to the duty parameter of heat pump air conditioner 10 and the working condition of heat demand load adjustment heat pump system 100, meet system
Heat request, and reduce energy consumption.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all such other variations or modifications.
Claims (10)
1. a kind of control method of heat pump air conditioner, comprising:
Start the heat pump air conditioner, to discharge heat using the indoor unit of the heat pump air conditioner；
Detect the duty parameter of the heat pump air conditioner；
Judge whether the duty parameter of the heat pump air conditioner meets preset extreme operating condition condition；
If so, the aperture adjusting range of the electric expansion valve of the heat pump air conditioner to be limited to less than to or is equal to default adjustment limit
Value.
2. control method according to claim 1, wherein after starting the heat pump air conditioner further include:
Determine the target exhaust temperature of the compressor of the heat pump air conditioner；
Detect the actual exhaust air temperature of the compressor；
Using the target exhaust temperature as reference quantity, using the actual exhaust air temperature as controlled variable to the electronic expansion
The aperture of valve carries out feedback control, so that the actual exhaust air temperature is close to the target exhaust temperature.
3. control method according to claim 2, wherein
The duty parameter of the heat pump air conditioner includes the environment temperature of the outdoor unit of the heat pump air conditioner, and described extreme
Working condition includes: the environment temperature lower than preset low temperature limit value and the actual exhaust air temperature and the target exhaust
The difference of temperature is less than fiducial temperature threshold value.
4. control method according to claim 3, wherein it is pre- to judge whether the duty parameter of the heat pump air conditioner meets
If extreme operating condition condition the step of include:
Judge whether the environment temperature is lower than preset low temperature limit value；
If so, calculating the absolute value of the difference of the actual exhaust air temperature and the target exhaust temperature, and judge described absolute
Whether value is less than the temperature difference threshold；
If so, determining that the duty parameter meets the extreme operating condition condition.
5. control method according to claim 2, wherein
In the case where the duty parameter of the heat pump air conditioner is unsatisfactory for the extreme operating condition condition, to the electric expansion valve
Aperture carry out feedback control the step of include: to carry out feedback control using aperture of the pid control algorithm to the electric expansion valve
System.
6. control method according to claim 2, wherein
The aperture adjusting range of the electric expansion valve of the heat pump air conditioner is being limited to less than to or is being equal to default adjustment limit value
Later, during carrying out feedback control to the aperture of the electric expansion valve, the aperture adjustment of each electric expansion valve
Amount is in the aperture adjusting range.
7. control method according to claim 6, wherein also being wrapped after the aperture for adjusting the electric expansion valve every time
It includes:
The actual exhaust air temperature of the compressor is detected again after the setting time of interval and whether completely to rejudge duty parameter
The preset extreme operating condition condition of foot, to carry out the aperture adjustment of the subsequent electric expansion valve.
8. control method according to claim 2, wherein determining the target exhaust temperature of the compressor of the heat pump air conditioner
The step of spending include:
Obtain the heat demand load of the indoor unit of the heat pump air conditioner；
According to the heat demand load, the target exhaust temperature is set.
9. control method according to claim 1, wherein after starting the heat pump air conditioner further include:
Obtain the heat demand load of the indoor unit of the heat pump air conditioner；
The compression of the initial opening and the heat pump air conditioner of the electric expansion valve is set according to the heat demand load
The running frequency of machine.
10. a kind of air conditioner, comprising:
Heat pump system is used for indoor release heat；
Control device comprising processor and memory, the memory are stored with control program, and the control program is by institute
State processor execute when for realizing according to claim 1 to any one of 9 heat pump air conditioner control method.
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Application publication date: 20190823 |