CN110030692A - The control method of air-conditioning under low temperature and low humidity heating condition - Google Patents
The control method of air-conditioning under low temperature and low humidity heating condition Download PDFInfo
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- CN110030692A CN110030692A CN201910267190.6A CN201910267190A CN110030692A CN 110030692 A CN110030692 A CN 110030692A CN 201910267190 A CN201910267190 A CN 201910267190A CN 110030692 A CN110030692 A CN 110030692A
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- compressor
- air
- conditioning
- frequency
- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/48—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring prior to normal operation, e.g. pre-heating or pre-cooling
-
- 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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- 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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
-
- 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
Abstract
The present invention relates to air-conditioning technical fields, and in particular to the control method of air-conditioning under a kind of low temperature and low humidity heating condition.Present invention seek to address that leading to the problem of compressor lubrication effect difference when quick heating effect is poor, environment temperature is lower present in existing air-conditioned booting raising frequency control method due to raising frequency time length.Control method of the invention includes: to obtain environment temperature and ambient humidity, when environment temperature is less than set temperature and ambient humidity is no more than setting humidity, control the compressor preheating of air-conditioning, after preheating, expansion valve is controlled according to multiple pass valve speed, continuously closes valve stage by stage to first object aperture, during the aperture of expansion valve reaches first object aperture, the compressor start of air-conditioning is controlled, control compressor is according to the setting continuous raising frequency of raising frequency speed.The compressor raising frequency time has been greatly shortened while the normal oil return of guarantee compressor in above-mentioned set-up mode, and then achievees the purpose that quickly to heat.
Description
Technical field
The present invention relates to air-conditioning technical fields, and in particular to the control method of air-conditioning under a kind of low temperature and low humidity heating condition.
Background technique
In order to meet the demand of user quickly heated, to bring more comfortable usage experience, existing air-conditioning is rigid
When booting, generally the quick raising frequency of compressor to higher frequency can all run.Refrigeration in compressor operation, in compressor
Agent can be promptly discharged, and be recycled in pipe-line system.In cyclic process, compression can be discharged together with refrigerant in lubricating oil
Machine enters in pipeline, this parts of lubricating oil being only discharged smoothly returns in compressor (i.e. oil return), could maintain entirely system
The dynamic equilibrium of lubricating oil in system, otherwise, compressor can be damaged because of oil starvation.For convertible frequency air-conditioner, with compressor
The velocity of discharge/rate of the raising of working frequency, lubricating oil is also getting faster, when the velocity of discharge/rate of lubricating oil is more than back
When maximum oil return speed/rate of oily capillary, the phenomenon that being just easy to produce oil starvation.Therefore it in order to guarantee normal oil return, is pressing
During contracting machine is quickly ramped up to high frequency, it will usually compressor be forced to continue in some or certain fixed frequencies (oil return frequency)
Operation a period of time, stablize subsequent frequency of continuing rising to oil return.
Although above-mentioned set-up mode ensure that normal oil return, but force compressor one section of continuous service in oil return frequency
The set-up mode of time, so that air-conditioning is being switched in quick heating operations, the raising frequency overlong time of compressor slows down compressor
Reach the speed of maximum operation frequency, also increase the time quickly heated after air-conditioning booting, and then influences air-conditioning and quickly make
The effect of heat brings bad usage experience for user.In addition, there is also compression when outdoor environment temperature is lower in winter
The problem of lubricating oil viscosity consistency in machine is got higher, and lubricant effect is deteriorated.
In order to solve this problem, the application for a patent for invention of Publication No. CN107576029A discloses a kind of low temperature and low humidity
The control method of air-conditioning under heating condition makes compressor according to more specifically, it first closes valve valve opening again by controlling expansion valve
A raising frequency speed, continuous raising frequency, is interrupted during raising frequency due to needing to wait oil return stage by stage so as to avoid compressor,
Decrease the raising frequency time of compressor.But the raising frequency time is still longer, can also carry out the raising frequency time to compressor
Further shorten, to keep the quick heating effect of air-conditioning more preferable.Also, the controlling party of valve valve opening again is first closed using control expansion valve
Formula is also easy to cause the starting pressure of air-conditioning system excessive and compressor exhaust pipe or condenser is caused to burst.
Correspondingly, this field needs a kind of control method of new air-conditioning to solve existing air-conditioning booting raising frequency controlling party
The problem of compressor lubrication effect difference when quickly heating effect is poor, environment temperature is lower caused by method is grown due to the raising frequency time.
Summary of the invention
In order to solve the above problem in the prior art, in order to solve to deposit in now air-conditioned booting raising frequency control method
The problem of compressor lubrication effect difference when leading to that quick heating effect is poor, environment temperature is lower since the raising frequency time is long,
The present invention provides a kind of control method of air-conditioning under low temperature and low humidity heating condition, the air-conditioning includes compressor, indoor heat exchange
Device, expansion valve and outdoor heat exchanger, the outdoor heat exchanger are configured with outer blower, which is characterized in that the control method includes:
Obtain environment temperature and ambient humidity；
When the environment temperature is less than set temperature and the ambient humidity is no more than setting humidity, the air-conditioning is controlled
Compressor preheating；
After the compressor preheating, the expansion valve is controlled according to multiple pass valve speed, continuously closes valve stage by stage
To first object aperture；
During the aperture of the expansion valve reaches first object aperture, the compressor start of the air-conditioning is controlled；
The compressor is controlled according to the setting continuous raising frequency of raising frequency speed.
Under above-mentioned low temperature and low humidity heating condition in the optimal technical scheme of the control method of air-conditioning, " in the expansion valve
Aperture reach first object aperture during, control the compressor start of the air-conditioning " the step of after, the controlling party
Method further include:
While the compressor start of the air-conditioning or later, the outer blower starting of the air-conditioning is controlled, and according to setting
Fixed acceleration raising speed is to first object revolving speed.
Under above-mentioned low temperature and low humidity heating condition in the optimal technical scheme of the control method of air-conditioning, " in the compressor
After preheating, the expansion valve is controlled according to multiple pass valve speed, continuously closes valve stage by stage to first object aperture " the step of
Further comprise:
After the compressor preheating, controls the expansion valve opening and be decreased to according to the first pass valve speed of setting
Reference opening amount；
When the expansion valve opening reaches the reference opening amount, controls the expansion valve opening and closed according to the second of setting
Valve speed continues to be decreased to the first object aperture.
Under above-mentioned low temperature and low humidity heating condition in the optimal technical scheme of the control method of air-conditioning, " in the expansion valve
Aperture reach first object aperture during, control the compressor start of the air-conditioning " the step of further comprise:
When the expansion valve reaches the reference opening amount, the compressor start of the air-conditioning is controlled.
Under above-mentioned low temperature and low humidity heating condition in the optimal technical scheme of the control method of air-conditioning, " pressure is being controlled
Contracting machine according to setting the continuous raising frequency of raising frequency speed " the step of after, the control method further include:
Judge whether compressor frequency reaches first object frequency；
When the compressor frequency reaches the first object frequency, controls the compressor and stop raising frequency.
Under above-mentioned low temperature and low humidity heating condition in the optimal technical scheme of the control method of air-conditioning, the first object frequency
Rate is the maximum operation frequency of the compressor；And/or
The first object aperture is the expansion valve opening to match with the first object frequency.
Under above-mentioned low temperature and low humidity heating condition in the optimal technical scheme of the control method of air-conditioning, the control method is also
Include:
Obtain environmental parameter；
When the environmental parameter reaches target component, controls the compressor and be downconverted to the second target frequency；And it controls
It makes the expansion valve opening and is decreased to the second target aperture；
Wherein, the environmental parameter is environment temperature and/or ambient humidity, and the target component is accordingly target temperature
And/or target humidity, second target frequency be the compressor rated operation frequency, the second target aperture be with
The expansion valve opening that second target frequency matches.
Under above-mentioned low temperature and low humidity heating condition in the optimal technical scheme of the control method of air-conditioning, the set temperature is
5℃；And/or the humidity that sets is 60%.
Under above-mentioned low temperature and low humidity heating condition in the optimal technical scheme of the control method of air-conditioning, " in the expansion valve
Aperture reach first object aperture during, control the compressor start of the air-conditioning " the step of further comprise:
When the expansion valve reaches reference opening amount, controls the compressor of the air-conditioning and the outer blower while opening
It is dynamic.
The present invention also provides a kind of control method of air-conditioning under low temperature and low humidity heating condition, the control method include with
Lower step:
Obtain environment temperature and ambient humidity；
When the environment temperature is less than set temperature and the ambient humidity is no more than setting humidity, the air-conditioning is controlled
Compressor preheating；
After the compressor preheating, controls the expansion valve opening and be decreased to according to the first pass valve speed of setting
Reference opening amount；
When the expansion valve opening reaches the reference opening amount, controls the expansion valve opening and closed according to the second of setting
Valve speed continues to be decreased to first object aperture, and described first, which closes valve speed, is greater than second pass valve speed；
When the expansion valve reaches the reference opening amount, the compressor start of the air-conditioning is controlled；
While the compressor start of the air-conditioning, the outer blower starting of the air-conditioning, and adding according to setting are controlled
Speed raising speed is to first object revolving speed；
The compressor is controlled according to the setting continuous raising frequency of raising frequency speed；
Judge whether compressor frequency reaches first object frequency；
When the compressor frequency reaches the first object frequency, controls the compressor and stop raising frequency.
It will be appreciated to those of skill in the art that in the preferred technical solution of the present invention, low temperature and low humidity heating condition
The control method of lower air-conditioning includes: to obtain environment temperature and ambient humidity；It is less than set temperature and ambient humidity in environment temperature
When no more than setting humidity, the compressor preheating of air-conditioning is controlled；After compressor preheating, expansion valve is controlled according to multiple passes
Valve speed continuously closes valve to first object aperture stage by stage；During the aperture of expansion valve reaches first object aperture, control
The compressor start of air-conditioning processed；Compressor is controlled according to the setting continuous raising frequency of raising frequency speed.
The advantages of above-mentioned control mode, is that the process that the present invention is changed by the aperture changed for expansion valve makes swollen
Swollen valve is constantly in close valve state, rather than first pass valve as described in the background art valve opening again, to enable expansion valve one
The straight raising frequency for adapting to compressor, that is, protect expansion valve opening always in compressor start and during compressor raising frequency
Hold matching status.So, so that compressor does not need to change raising frequency speed reality as the patent application in background technique
Now be segmented raising frequency, or as the prior art within a certain period of time maintain the constant waiting oil return of frequency, but can always with
The speed of one stable high speed completes raising frequency.Due to the promotion of raising frequency speed, shortens the raising frequency time, also just make the quick of air-conditioning
Heating effect is reinforced.In addition, if expansion valve is first reduced to first object aperture hereinafter, rising back target aperture again, in pipeline
Starting pressure will be and be gradually increased to a maximum, then be slowly lowered to stationary value, during pressure increases, very
The case where compressor exhaust pipe or condenser may being caused to burst since the starting pressure of air-conditioning system is excessive.And this hair
The control mode of bright expansion valve makes expansion valve be constantly in the state for being gradually decrease to stationary value, thus the starting in pipeline
Pressure will not reach a maximum, but slowly rise to stationary value, in this case, avoid due to air-conditioning system
Starting pressure it is excessive and the case where cause compressor exhaust pipe or condenser to burst.Open expansion valve opening in compressor
With the control mode of compressor matched in advance when dynamic, just possess the expansion valve opening to match before compressor start can be made, from
And expansion valve opening occurs with the bad situation of compressor matching degree caused by avoiding expansion valve from starting together with compressor, it is fast
Speed improves the heating effect after compressor start.By obtaining environment temperature and ambient humidity before compressor start, and
It is less than set temperature in environment temperature and ambient humidity is no more than setting humidity Shi Xianrang compressor preheating, compressor can be made to moisten
Lubricating oil viscosity reduces, and improves the lubricant effect and running stability of compressor.
Detailed description of the invention
The control method of air-conditioning under low temperature and low humidity heating condition of the invention described with reference to the accompanying drawings.In attached drawing:
Fig. 1 is the flow chart of the control method of air-conditioning under low temperature and low humidity heating condition of the invention；
Fig. 2 be low temperature and low humidity heating condition of the invention under air-conditioning control method compressor with compress in the prior art
The raising frequency process comparison diagram of machine；
Fig. 3 be low temperature and low humidity heating condition of the invention under air-conditioning control method in environment temperature less than 5 DEG C, environmental wet
When degree is no more than 60%, the control logic figure of compressor, outer blower and expansion valve.
Specific embodiment
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little embodiments are used only for explaining technical principle of the invention, it is not intended that limit the scope of the invention.Although for example,
The present invention is that the embodiment that two pass valve stages are arranged in conjunction with expansion valve is described, but this setup is not one
At constant, in the case of without departing from the principle of the invention, those skilled in the art can also apply the inventive method to other
Application scenarios, as three even more pass valve stages can also be arranged in expansion valve.
With reference first to Fig. 1, the control method of air-conditioning under low temperature and low humidity heating condition of the invention is introduced.Wherein,
Fig. 1 is the flow chart of the control method of air-conditioning under low temperature and low humidity heating condition of the invention.
As shown in Figure 1, in order to solve present in now air-conditioned booting raising frequency control method since the raising frequency time is long and
Lead to the problem of compressor lubrication effect difference when quick heating effect is poor, environment temperature is lower, the present invention provides a kind of low temperature
The control method of air-conditioning under low humidity heating condition, the control method mainly comprise the steps that
S100, environment temperature and ambient humidity are obtained, so that air-conditioning is switched on as user presses starting switch for air-conditioning and select
After selecting heating mode, air-conditioning obtains environment temperature and ambient humidity by Hygrothermograph or Temperature Humidity Sensor etc., wherein environment
Temperature, ambient humidity can refer to the temperature and relative humidity of outdoor environment；
S200, when environment temperature is less than set temperature and ambient humidity no more than setting humidity, control the compression of air-conditioning
Machine preheating makes compressor preheating such as by way of being powered or being powered directly to compressor to setting heat tape in compressor
1min, and then reduce the lubricating oil viscosity consistency in compressor, it is preferable that set temperature is 5 DEG C, sets humidity as 60%；
S300, after compressor preheating, control expansion valve opening according to setting first pass valve speed be decreased to base
Quasi- aperture such as controls expansion valve from 480 steps and is first decreased to reference opening amount according to the first pass valve speed 200P/s (i.e. 200 steps/second)
400 steps, it is preferable that expansion valve is electric expansion valve or other can control the expansion valve of aperture；
It should be noted that the aperture regulation of electric expansion valve is driven by stepper motor, stepper motor is rotated most
Small angle range is known as a step, and therefore, the aperture regulation of electric expansion valve is typically all to press " step " Lai Hengliang.Such as expansion valve
Aperture is 200 steps.I.e. stepper motor drives expansion valve to turn to the 200th angular unit.Usually it is in close state in air-conditioning
When, it is balance system pressure, expansion valve can all be in biggish aperture, as expansion valve is in close state in air-conditioning in the present invention
When aperture can be 480 steps, naturally it is also possible to be other biggish apertures.And reference opening amount is arranged according to operational mode
Aperture corresponding with outdoor temperature and compressor frequency, the setting of reference opening amount facilitate system pressure difference foundation, realize air-conditioning
Quickly cooling and speed heat.If reference opening amount of the present invention can be 400 steps, naturally it is also possible to be other apertures.That is, in outer blower
While starting, expansion valve opening first closes valve speed such as 200P/s (i.e. 200 steps/second) according to first from 480 steps and is decreased to benchmark
400 step of aperture.
S400, when expansion valve opening reaches reference opening amount, control expansion valve opening according to setting second close valve speed
Continue to be decreased to first object aperture, such as second close valve speed be 100P/s, from 400 step of reference opening amount with second close valve speed after
Continuous valve to first object aperture of closing is 350 steps.
S500, when expansion valve reaches reference opening amount, the compressor start of air-conditioning is controlled, as expansion valve reaches reference opening amount
When 400 step, the compressor of air-conditioning is opened.
S600, while compressor start, control the outer blower starting of air-conditioning, and rise to the according to the acceleration of setting
One rotating speed of target starts outer blower according to the acceleration for improving 1000r/min each second, and reached at 3 seconds
The first object revolving speed of 3000r/min.
S700, when compressor reaches first object frequency, control compressor stop raising frequency, it is preferable that first object is opened
Degree is the expansion valve opening to match with the first object frequency of compressor, that is to say, that in compressor start to first object
When frequency, expansion valve also drops to the first mesh to match with first object frequency from reference opening amount with the second pass valve speed just
Mark aperture.
It can be seen from the above description that the control method of air-conditioning of the invention is in environment temperature less than 5 DEG C and environment
It when humidity is not more than 60%, preheats compressor first, the lubricating oil viscosity consistency in compressor can be made to reduce, and then improve compression
Lubricant effect when machine works.After preheating, the compressor for controlling air conditioner starts or same with outer blower prior to outer blower
Shi Qidong (the case where foregoing description is while starting), enables compressor to start and carry out raising frequency as early as possible, compression is omitted
The step of needing first to open outer fan radiating (to avoid quick frosting) before machine starting, shortens the raising frequency time of compressor, mentions
Heating effect after high compressor start.Control expansion valve is decreased to reference opening amount according to the first pass valve speed of setting,
Expansion valve starts compressor when reaching reference opening amount, and when expansion valve continues to drop to first object aperture, compressor
Just first object frequency is risen to, so that expansion valve be made when rising to first object frequency, to pass through base in compressor start
Quasi- aperture and first object aperture and the frequency of compressor match, and air-conditioning system starting pressure is caused when avoiding compressor start
Power is excessive and the case where causing compressor exhaust pipe or condenser to burst.And enable compressor always with a high speed shape
State raising frequency and it is uninterrupted or slow down, can undoubtedly greatly shorten the raising frequency time of compressor, and then make after improving compressor start
It is shorter when thermal energy is enough, achieve the purpose that quickly to heat.That is, present invention eliminates the stoppings during compressor raising frequency
Raising frequency waits the process of oil return, then in such a way that the working frequency of the aperture and compressor that control expansion valve matches, it protects
The normal oil return of compressor is demonstrate,proved.Meanwhile invention also avoids down speeding procedures when compressor segmentation raising frequency, but make compressor
The liter of compressor can be greatly reduced to first object frequency with a very high direct raising frequency of raising frequency speed so after actuation
The frequency time, to solve quick heating effect caused by existing air-conditioning booting raising frequency control method is grown due to the raising frequency time
The problem of difference.
Certainly, the reference opening amount of expansion valve and first object aperture are also not unalterable, but are opened according to compressor
First working frequency of required frequency and compressor is relevant when dynamic, it will usually be confirmed by actual tests, and compressed
The differences such as machine power, brand, the first working frequency be not also identical.Preferably, first object frequency is the most senior engineer of compressor
Working frequency, so that compressor be enable to complete heating with most fast speed, can also be certainly close to maximum operating frequency certain
One numerical value guarantees that compressor not exclusively moves at full capacity, to protect compressor, makes its operating lifetime.Similarly, due to
Reference opening amount and first object aperture be not it is completely specified, correspondingly reach the time of reference opening amount and first object aperture
Nor determining, therefore the first pass valve speed and the second pass valve speed are not unalterable, but art technology yet
Personnel can complete to adjust according to virtual condition, as long as the adjustment enables to compressor being capable of quick raising frequency.Similarly,
Environment temperature, ambient humidity and the setting of preheating time are not only limited to 5 DEG C, 60% and a kind of mode of 1min, this field
Technical staff can be adjusted based on different regions Different climate condition, such as set 3 DEG C or 7 DEG C for set temperature, will be set
Determine humidity and be set as 55% or 65%, 30s or 2min etc. will be set as preheating time.
The principle of the present invention is further described referring to Fig. 2.Wherein, Fig. 2 is that low temperature and low humidity of the invention heats work
The raising frequency process comparison diagram of the compressor of the control method of air-conditioning and compressor in the prior art under condition.In Fig. 2, heavy line is indicated
The raising frequency process of control method compressor of the invention, fine line indicate Publication No. described in background technology
The raising frequency process of the control method compressor of the patent application (below or referred to as referenced patent) of CN107576029A, dotted line table
Show the raising frequency process of compressor in the prior art.
As shown in Fig. 2, in the prior art, after compressor start generally using fixed raising frequency speed V (such as 1Hz/s) into
Row raising frequency, and guarantee the normal oil return of compressor during raising frequency, it is provided with the first oil return frequency f1With the second oil return
Frequency f2, when compressor raising frequency to the first oil return frequency f1When, the lubricating oil in compressor be in or will in oil starvation state,
Therefore compressor maintains a period of time in this frequency, guarantees to be further continued for after the stabilization oil return of compressor with raising frequency speed V continuation
Raising frequency.Similarly, in compressor raising frequency to the second oil return frequency f2, and a period of time is maintained in this frequency, guarantee that compressor is steady
The subsequent frequency of continuing rising of oil return is determined, until compressor reaches maximum frequency fmaxAfter stop raising frequency.As stated in the background art, such liter
Frequency mode is due in the first oil return frequency f1With the second oil return frequency f2A period of time is maintained, therefore has seriously affected compressor
Raising frequency speed cannot meet the needs of quickly heating although ensure that the stabilization oil return of compressor well.With reference to special
In benefit, compressor uses continuous raising frequency and is still first begin to during raising frequency with very fast raising frequency speed V1(such as
Raising frequency 1.5Hz/s) is carried out, then since the opening of expansion valve is too small, it has to raising frequency speed is reduced, with V2(such as 0.7Hz/s)
Carry out raising frequency, raising frequency to maximum frequency fmaxTime it is opposite shorten, but shorten limited time.
With continued reference to Fig. 2, in the preferred embodiment of the present invention, the raising frequency of compressor, which exists, to carry out the frequency of oil return and maintains
State, also without segmentation raising frequency, the state for reducing raising frequency speed exists, but with a higher raising frequency speed V3(such as 2Hz/
S) always raising frequency to maximum frequency fmax, the time needed for raising frequency has with the time in referenced patent compared with the existing technology
It is greatly shortened.
The advantages of above-mentioned set-up mode is: the present invention can make to press while the normal oil return of guarantee compressor
Quickly raising frequency and then meets the needs of user quickly heats to maximum operation frequency to contracting function.It can significantly be seen referring to Fig. 2
Out, it is tested repeatedly through inventor, the time that compressor of the invention reaches maximum operation frequency considerably less than presses in the prior art
Contracting machine reaches the time in the time and referenced patent of maximum operation frequency.
The principle of the present invention is further described referring to Fig. 3.Wherein, Fig. 3 is that low temperature and low humidity of the invention heats work
The control method of air-conditioning is when ambient humidity is not more than 60% under condition, the control logic figure of compressor, outer blower and expansion valve.
The curve controlled figure for only seeing electric expansion valve first, in one of figure preferred embodiment, we can be clear
See to Chu, first closes valve speed V21' it is greater than the second pass valve speed V22', certainly, this it is not necessary to, the size of the two is simultaneously
It is not specific, it is obtained by experimental data.
The step of in addition, referring to three curves above Fig. 3, a kind of preferred embodiment is, S500 further comprises:
S510, when expansion valve reaches reference opening amount, the outer blower of the compressor and air-conditioning that make air-conditioning starts simultaneously.
The advantages of above-mentioned set-up mode is: the present invention starts outer blower simultaneously, and rise when starting compressor
Speed can be started to first object revolving speed under the premise of not interfering compressor start with prestissimo, and be air-conditioner outdoor unit
It exchanges heat with outdoor environment, the step of opening outer blower in advance is omitted, shortens the available machine time of compressor, improve heating speed
Degree.
Certainly, first object revolving speed is not only limited to a kind of form of maximum functional revolving speed, can improve compressor heat sink strip
In the case of part, those skilled in the art can set the first object revolving speed to any reasonable numerical value, so as to its satisfaction
More specifical application scenarios, as first object revolving speed can also for close to outer blower maximum functional revolving speed a certain tachometer value or
The maximum (top) speed value that outer blower can reach under outer boundary's environment temperature.
Mode is preferably set up and specific value is used merely to illustrate the principle of the present invention it should be pointed out that above-mentioned, and
It is not intended in limiting the scope of the invention, under the premise of without departing from the principle of the invention, those skilled in the art can be with
Any form of adjustment is done to above-mentioned parameter, as long as technical solution adjusted can be in the premise for guaranteeing the normal oil return of compressor
Lower raising raising frequency speed.Such as further it will can also be divided into three phases or more stages, Mei Gejie in the pass valve stage
Section carries out closing valve etc. with different pass valve speed.
In addition, preferably to improve the experience that user uses air-conditioning, when compressor is worked with maximum operation frequency, this hair
The control method of bright air-conditioning can with the following steps are included:
S700, environmental parameter is obtained, such as obtains current environment temperature (such as room temperature)；
S800, reach in environmental parameter/close to target component when, so that compressor is downconverted to the second target frequency, make simultaneously
The revolving speed of outer blower is reduced to the second rotating speed of target, expansion valve opening to be decreased to the second target aperture, and such as temperature reaches indoors
Target temperature set by user or when close to target temperature, makes compressor be downconverted to rated operation frequency or be reduced to and extraneous ring
The working frequency that border temperature matches, while the revolving speed of outer blower being made to be reduced to nominal operation revolving speed or match with compressor
Working speed, and the aperture of expansion valve is made to be decreased to the aperture to match with the present operating frequency of compressor.
Have the advantage that in this way: after air-conditioning quickly heats a period of time, room temperature can rise accordingly, work as ring
Border temperature reaches/close to temperature set by user when, compressor does not just have to continue to operate in maximum operation frequency, and outer blower is natural
Radiate without work in maximum (top) speed, expansion valve without work in the matched first object aperture of compressor.
At this moment by compressor be downconverted to rated operation frequency or with the more matched working frequency of current environment (such as outdoor temperature), and
The revolving speed that the revolving speed of outer blower is reduced to nominal operation revolving speed or matched with compressor, and the aperture of expansion valve is reduced
It to the aperture to match with compressor, can not only guarantee the normal work of air-conditioning, but also effectively extend compressor, exogenous wind
The working life of machine and expansion valve.
Certainly, environmental parameter and corresponding target component are not unalterable, can also be ambient humidity (such as interior/room
Outer humidity) and target humidity set by user etc..
It is described briefly below with reference to working principle of the Fig. 3 to the control method of air-conditioning under heating mode of the invention.Such as
Shown in Fig. 3, in heating mode, the course of work of outer blower, expansion valve and compressor may is that air-conditioning
Air-conditioning booting heating → acquisition environment temperature and ambient humidity are lower than 5 DEG C in environment temperature and ambient humidity are little
When 60%, make the heat tape of compressor according to voltage U1' be powered → through T0Heat tape powers off after time interval, expansion valve
Valve speed V is closed according to first21' from aperture B1' start to reduce aperture → through T1Expansion valve reaches reference opening amount B after time interval2'
When, compressor booting, and according to raising frequency speed V11' raising frequency, outer blower is also switched on simultaneously, and according to acceleration a1' improve revolving speed
→ expansion valve closes valve speed V according to second22' continue to reduce aperture, outer blower raising speed to maximum functional revolving speed n1' → through T2Time
Compressor raising frequency is to maximum operation frequency f behind interval1' and stop raising frequency, expansion valve reduce aperture to maximum operation frequency phase
Matched aperture B3' and stablize in this aperture, outer blower is stablized in maximum functional revolving speed n1' → through T3And T4Time interval rear chamber
Interior temperature reaches the set temperature of user, and compressor is with frequency reducing speed V12' frequency reducing, while outer blower is with acceleration a2' reduction turn
Speed, expansion valve is to close valve speed V23' reduction aperture → through T5Compressor frequency is down to rated operation frequency f after time interval2' simultaneously
It maintains in this frequency, while outer rotation speed of fan is down to nominal operation revolving speed n'2And maintain in this frequency, expansion valve opening is decreased to
With f2' matched B4'4And it maintains in this frequency.
Certainly, by T1After time interval, when compressor is switched on, outer blower is also possible to be later than compressor start, equally
Can reach starts compressor preferentially, to reduce the time of compressor raising frequency to maximum operation frequency.
So far, it has been combined preferred embodiment shown in the drawings and describes technical solution of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific embodiments.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to the relevant technologies feature, these
Technical solution after change or replacement will fall within the scope of protection of the present invention.
Claims (10)
1. the control method of air-conditioning under a kind of low temperature and low humidity heating condition, the air-conditioning include compressor, indoor heat exchanger, expansion
Valve and outdoor heat exchanger, the outdoor heat exchanger are configured with outer blower, which is characterized in that the control method includes:
Obtain environment temperature and ambient humidity；
When the environment temperature is less than set temperature and the ambient humidity is no more than setting humidity, the pressure of the air-conditioning is controlled
The preheating of contracting machine；
After the compressor preheating, the expansion valve is controlled according to multiple pass valve speed, continuously close valve stage by stage to the
One target aperture；
During the aperture of the expansion valve reaches first object aperture, the compressor start of the air-conditioning is controlled；
The compressor is controlled according to the setting continuous raising frequency of raising frequency speed.
2. the control method of air-conditioning under low temperature and low humidity heating condition according to claim 1, which is characterized in that " described
During the aperture of expansion valve reaches first object aperture, control the compressor start of the air-conditioning " the step of after, it is described
Control method further include:
While the compressor start of the air-conditioning or later, the outer blower starting of the air-conditioning is controlled, and according to setting
Acceleration raising speed is to first object revolving speed.
3. the control method of air-conditioning under low temperature and low humidity heating condition according to claim 2, which is characterized in that " described
After compressor preheating, the expansion valve is controlled according to multiple pass valve speed, continuously closes valve stage by stage to first object aperture "
The step of further comprise:
After the compressor preheating, the expansion valve opening is controlled according to the first pass valve speed of setting and is decreased to benchmark
Aperture；
When the expansion valve opening reaches the reference opening amount, the expansion valve opening is controlled according to the second of setting and closes valve speed
Degree continues to be decreased to the first object aperture.
4. the control method of air-conditioning under low temperature and low humidity heating condition according to claim 3, which is characterized in that " described
During the aperture of expansion valve reaches first object aperture, control the compressor start of the air-conditioning " the step of further wrap
It includes:
When the expansion valve reaches the reference opening amount, the compressor start of the air-conditioning is controlled.
5. the control method of air-conditioning under low temperature and low humidity heating condition according to claim 1, which is characterized in that in " control
The compressor according to setting the continuous raising frequency of raising frequency speed " the step of after, the control method further include:
Judge whether compressor frequency reaches first object frequency；
When the compressor frequency reaches the first object frequency, controls the compressor and stop raising frequency.
6. the control method of air-conditioning under low temperature and low humidity heating condition according to claim 5, which is characterized in that
The first object frequency is the maximum operation frequency of the compressor；And/or
The first object aperture is the expansion valve opening to match with the first object frequency.
7. the control method of air-conditioning under low temperature and low humidity heating condition according to claim 5, which is characterized in that the control
Method further include:
Obtain environmental parameter；
When the environmental parameter reaches target component, controls the compressor and be downconverted to the second target frequency；And control institute
It states expansion valve opening and is decreased to the second target aperture；
Wherein, the environmental parameter be environment temperature and/or ambient humidity, the target component be accordingly target temperature and/
Or target humidity, second target frequency be the compressor rated operation frequency, the second target aperture for institute
State the expansion valve opening that the second target frequency matches.
8. the control method of air-conditioning under low temperature and low humidity heating condition according to claim 1, which is characterized in that the setting
Temperature is 5 DEG C；And/or the humidity that sets is 60%.
9. the control method of air-conditioning under low temperature and low humidity heating condition according to claim 3, which is characterized in that " described
During the aperture of expansion valve reaches first object aperture, control the compressor start of the air-conditioning " the step of further wrap
It includes:
When the expansion valve reaches reference opening amount, controls the compressor of the air-conditioning and the outer blower while starting.
10. the control method of air-conditioning under a kind of low temperature and low humidity heating condition, which is characterized in that the control method includes following step
It is rapid:
Obtain environment temperature and ambient humidity；
When the environment temperature is less than set temperature and the ambient humidity is no more than setting humidity, the pressure of the air-conditioning is controlled
The preheating of contracting machine；
After the compressor preheating, the expansion valve opening is controlled according to the first pass valve speed of setting and is decreased to benchmark
Aperture；
When the expansion valve opening reaches the reference opening amount, the expansion valve opening is controlled according to the second of setting and closes valve speed
Degree continues to be decreased to first object aperture, and described first, which closes valve speed, is greater than second pass valve speed；
When the expansion valve reaches the reference opening amount, the compressor start of the air-conditioning is controlled；
While the compressor start of the air-conditioning, the outer blower starting of the air-conditioning is controlled, and according to the acceleration of setting
Raising speed is to first object revolving speed；
The compressor is controlled according to the setting continuous raising frequency of raising frequency speed；
Judge whether compressor frequency reaches first object frequency；
When the compressor frequency reaches the first object frequency, controls the compressor and stop raising frequency.
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