CN109059184A - Temperature protection control method and air conditioner - Google Patents
Temperature protection control method and air conditioner Download PDFInfo
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- CN109059184A CN109059184A CN201810681279.2A CN201810681279A CN109059184A CN 109059184 A CN109059184 A CN 109059184A CN 201810681279 A CN201810681279 A CN 201810681279A CN 109059184 A CN109059184 A CN 109059184A
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- temperature
- compressor
- temperature threshold
- threshold
- frequency reducing
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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
-
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
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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
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The present invention provides a kind of temperature protection control method and air conditioners.Wherein, temperature protection control method includes: to determine whether to enter stable operation stage；If not entering the stable operation stage, start the first temperature protection strategy；If enabling second temperature Preservation tactics into the stable operation stage, wherein since the second temperature Preservation tactics are different from the trigger condition that the first temperature protection strategy controls compressor.Namely; the present invention carries out temperature protection to air conditioner by the temperature protection strategy for the different operation phase; both ensured that temperature protection can effectively reduce system pressure; it avoids effect caused by not entering stable operation stage triggering frequency reducing poor again, enhances the reliability and using effect of air conditioner.
Description
Technical field
The present invention relates to air-conditioning protection technique field, in particular to a kind of temperature protection control method and air conditioner.
Background technique
There is very big influence to the use of air-conditioning equipment in installation environment.By taking environment temperature as an example, if environment temperature is excessively high,
The system pressure that the air-conditioning products can be directly resulted in increases.The increase of system pressure will affect the stability of air-conditioning products.With this
Meanwhile the installation environment of air-conditioning equipment is difficult to control, and is usually mounted to the narrow of outdoor especially for the outdoor unit of air-conditioning equipment
Space, corresponding environment temperature are almost difficult human intervention.
In order to solve to provide in the related technology due to the excessively high excessively high system pressure come to air-conditioning products of environment temperature
Solution be to add heat exchanger coils temperature protection function.Specifically, when there is coil temperature more than setting value, it is low
Compressor operating frequency drop is shut down.Although this solution cost is cheap, due to being deposited in air-conditioning products operational process
In the different operation phase, the case where same standard often generates false triggering frequency reducing, and then lead to refrigeration or heating effect
It is deteriorated.
Summary of the invention
In view of this, the present invention is directed to propose a kind of temperature protection control method, to improve the above problem.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of temperature protection control method, be applied to air conditioner, the temperature protection control method include: determine whether into
Enter stable operation stage；If not entering the stable operation stage, start the first temperature protection strategy；If into the stabilization
Operation phase then enables second temperature Preservation tactics, wherein the second temperature Preservation tactics and the first temperature protection plan
The trigger condition difference that slightly compressor is controlled.
Further, the mode for enabling second temperature Preservation tactics includes: that acquisition according to the preset time interval is changed
The coil temperature of hot device；When the collected coil temperature is higher than the first temperature threshold and is less than second temperature threshold value, control
Making the compressor maintains current frequency to run, and forbids raising frequency；When the collected coil temperature is higher than described second
Temperature threshold and when being less than third temperature threshold, controls the compressor with the first frequency reducing speed and carries out frequency reducing, until collect
The coil temperature be lower than the second temperature threshold value；When the collected coil temperature is higher than the third temperature threshold
And when less than four temperature thresholds, the compressor is controlled with the second frequency reducing speed and carries out frequency reducing, until the collected disk
Tube temperature degree is lower than the third temperature threshold；Wherein, the second frequency reducing speed is higher than the first frequency reducing speed；When collecting
Coil temperature when being higher than four temperature threshold, it is out of service to control the compressor, until collected described
Coil temperature is lower than preset releasing threshold value, restarts the compressor.
Further, the mode of the first temperature protection strategy of the starting includes: according to described in time interval acquisition
The coil temperature of heat exchanger；When the collected coil temperature is higher than the 5th temperature threshold and when less than six temperature thresholds,
Controlling the compressor maintains current frequency to run, and forbids raising frequency；Wherein, the 5th temperature threshold is not less than described the
One temperature threshold, the 6th temperature threshold are not less than the second temperature threshold value；When the collected coil temperature is higher than
6th temperature threshold and when less than seven temperature thresholds, is controlled the compressor and is dropped with the first frequency reducing speed
Frequently, until the collected coil temperature is lower than the 6th temperature threshold；7th temperature threshold is not less than described the
Three temperature thresholds；When the collected coil temperature is higher than the 7th temperature threshold and when less than eight temperature thresholds, control
It makes the compressor and frequency reducing is carried out with the second frequency reducing speed, until the collected coil temperature is lower than the 7th temperature
Spend threshold value；Wherein, the 8th temperature threshold is not less than the 4th temperature threshold；When the collected coil temperature is higher than
When eight temperature threshold, it is out of service to control the compressor, until the collected coil temperature is lower than the solution
Except threshold value, the compressor is restarted.
Further, the mode of the first temperature protection strategy of the starting includes: according to described in time interval acquisition
The coil temperature of heat exchanger；In the first lasting duration the collected coil temperature be higher than first temperature threshold and
When less than the second temperature threshold value, controls the compressor and current frequency is maintained to run, and forbid raising frequency；Lasting
When the collected coil temperature is higher than the second temperature threshold value and is less than the third temperature threshold in two durations, control
The compressor carries out frequency reducing with the first frequency reducing speed, until the collected coil temperature is lower than the second temperature
Threshold value；The collected coil temperature is higher than the third temperature threshold and is less than the described 4th in lasting third duration
When temperature threshold, the compressor is controlled with the second frequency reducing speed and carries out frequency reducing, until the collected coil temperature
Lower than the third temperature threshold；The collected coil temperature is higher than the 4th temperature threshold in the 4th lasting duration
When value, it is out of service to control the compressor, until the collected coil temperature is lower than the releasing threshold value, restarting
The compressor.
Further, the mode of the first temperature protection strategy of the starting includes: according to described in time interval acquisition
The coil temperature of heat exchanger；In the first lasting duration the collected coil temperature be higher than the 5th temperature threshold and
When less than six temperature threshold, controls the compressor and current frequency is maintained to run, and forbid raising frequency；Lasting
When the collected coil temperature is higher than the 6th temperature threshold and is less than seven temperature threshold in two durations, control
The compressor carries out frequency reducing with the first frequency reducing speed, until the collected coil temperature is lower than the 6th temperature
Threshold value；The collected coil temperature is higher than the 7th temperature threshold and is less than the described 8th in lasting third duration
When temperature threshold, the compressor is controlled with the second frequency reducing speed and carries out frequency reducing, until the collected coil temperature
Lower than the 7th temperature threshold；The collected coil temperature is higher than the 8th temperature threshold in the 4th lasting duration
When value, it is out of service to control the compressor, until the collected coil temperature is lower than the releasing threshold value, restarting
The compressor.
Further, described to determine whether that the mode into stable operation stage includes: to obtain the runing time of compressor；
If the runing time is not more than preset time threshold, judgement does not enter the stable operation stage；If the runing time
Greater than preset time threshold, then determine to enter the stable operation stage.
Further, described to determine whether that the mode into stable operation stage includes: to acquire institute according to the preset period
State the specified tube temperature in air conditioner；If the difference between two neighboring period corresponding specified tube temperature is more than default
Value then determines not entering the stable operation stage；If continuous acquisition to multiple specified tube temperatures between any two
Difference be no more than preset value, then determine enter the stable operation stage.
Further, the specified tube temperature includes any one among the coil temperature of delivery temperature or heat exchanger.
Compared with the existing technology, temperature protection control method of the present invention has the advantage that
Temperature protection control method of the present invention is by first determining whether to enter stable operation stage, further according to judgement
As a result, make air conditioner in the different operation phase using the different temperature protection strategy of trigger condition, targetedly temperature protection plan
False triggering is slightly avoided to adjust cooler compressor frequency.It is, then starting not entering the stable operation stage
One temperature protection strategy is entering the stable operation stage, is then enabling conventional second temperature Preservation tactics.Due to two kinds of temperature
The trigger condition for spending frequency adjustment of the Preservation tactics triggering to compressor is not identical, so that it is guaranteed that not entering stable operation stage
Under this special operation phase, will not accidentally it touch because of accidentally reaching the trigger condition of conventional second temperature Preservation tactics
Send out temperature protection；It, will not be because of the corresponding trigger condition of the first temperature protection strategy can not be triggered always in stable operation stage
And influence the effect of temperature protection function.Not only ensured that temperature protection can effectively reduce system pressure, but also avoided not entering steady
Determine the operation phase, effect caused by temperature fluctuation triggering frequency reducing is poor, enhances the reliability and using effect of air conditioner.The present invention
Another object be to propose a kind of air conditioner, to improve the above problem.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of air conditioner, the air conditioner include: determination module, for determining whether to enter stable operation stage；First
Execution module, if starting the first temperature protection strategy for not entering the stable operation stage；Second execution module is used
If enabling second temperature Preservation tactics in into the stable operation stage, wherein the second temperature Preservation tactics and institute
It is different to state the trigger condition that the first temperature protection strategy controls compressor.
Further, second execution module is specifically used for: the coil pipe of heat collecting exchanger according to the preset time interval
Temperature；When the collected coil temperature is higher than the first temperature threshold and is less than second temperature threshold value, the compression is controlled
The frequency that machine remains current is run, and forbids raising frequency；When the collected coil temperature be higher than the second temperature threshold value and
When less than third temperature threshold, the compressor is controlled with the first frequency reducing speed and carries out frequency reducing, until the collected coil pipe
Temperature is lower than the second temperature threshold value；When the collected coil temperature is higher than the third temperature threshold and less than the 4th
When temperature threshold, the compressor is controlled with the second frequency reducing speed and carries out frequency reducing, until the collected coil temperature is lower than
The third temperature threshold；Wherein, the second frequency reducing speed is higher than the first frequency reducing speed；When the collected coil pipe
When temperature is higher than four temperature threshold, it is out of service to control the compressor, until the collected coil temperature is low
In preset releasing threshold value, the compressor is restarted.
Possessed advantage is identical compared with the existing technology with above-mentioned temperature protection control method for the air conditioner, herein not
It repeats again.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is a kind of step flow chart of temperature protection control method described in the embodiment of the present invention；
Fig. 2 is the sub-step flow chart of step S102 in Fig. 1；
Fig. 3 is a kind of application example of temperature protection control method shown in the embodiment of the present invention；
Fig. 4 is a kind of the functional block diagram of air conditioner described in the embodiment of the present invention.
Description of symbols:
1- air conditioner, 2- determination module, the first execution module of 3-, the second execution module of 4-.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
There is very big influence to the use of air-conditioning equipment in installation environment.By taking environment temperature as an example, if environment temperature is excessively high,
The system pressure that the air-conditioning products can be directly resulted in increases.The increase of system pressure will affect the stability of air-conditioning products.In order to
It solves to give air-conditioning products the excessively high system pressure come since environment temperature is excessively high, in the related technology, the solution provided
To add heat exchanger coils temperature protection function.Specifically, compressor is run when heat exchanger coils temperature is more than setting value
Frequency is reduced or is shut down.
Then start initial operating stage in air conditioner, the variation of heat exchanger coils temperature is first to increase, then reduce, final steady
It is fixed.Meanwhile there are 2~3 DEG C between the highest coil temperature and finally stable coil temperature that initial operating stage reaches for coil pipe
Difference.It is, interim coil pipe high temperature is then easy triggering frequency reducing when the air conditioner does not also enter stable operation stage, and
Frequency reducing protection can not be exited later, maintains low-frequency operation, and the refrigeration of air conditioner or heating effect is caused to be deteriorated.Therefore, this hair
Bright embodiment is intended to provide a kind of temperature protection control method, for solving the above problems.
In addition, the stable operation stage being previously mentioned in an embodiment of the present invention, refers to an operation phase of air conditioner,
Every operating index (for example, all kinds of coil temperatures) stability is stablized in air conditioner in this stage, is not in interim fluctuation.
The first temperature protection strategy being previously mentioned in an embodiment of the present invention, refers to including multiple trigger conditions and corresponding compressor
Frequency adjustment mode.The second temperature Preservation tactics being previously mentioned in an embodiment of the present invention, also include multiple trigger conditions and
Corresponding compressor frequency adjustment mode.It should be noted that the first temperature protection strategy and second temperature Preservation tactics institute are right
The trigger condition answered is different.The specified tube temperature being previously mentioned in an embodiment of the present invention refers to previously selected a kind of disk
The temperature of pipe.Optionally, specified tube temperature can be any one among the coil temperature of delivery temperature or heat exchanger.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
First embodiment
Referring to FIG. 1, a kind of temperature protection control method provided in an embodiment of the present invention, it is intended to ensure effectively to drop
While the system pressure of low air conditioner 1, the coil pipe high temperature triggering air conditioner 1 interim when not entering stable operation stage is avoided
Frequency reducing, and then influence the using effect of air conditioner 1.As shown in Figure 1, the temperature protection control method may comprise steps of:
Step S101 determines whether to enter stable operation stage.
In embodiments of the present invention, first judge whether air conditioner 1 comes into stable operation stage.Optionally, judgement is
The no mode into stable operation stage can be the runing time for obtaining compressor, i.e. the timing since compressor operation, with
Obtain the runing time of compressor.If the runing time obtained is not more than preset time threshold, judgement does not enter the stabilization
Operation phase.If the runing time is greater than preset time threshold, determine to enter the stable operation stage.
Optionally, determine whether that the mode into stable operation stage can also be and acquire the sky according to the preset period
Adjust the specified tube temperature in device 1.If the difference between two neighboring period corresponding specified tube temperature is more than preset value,
Judgement does not enter the stable operation stage.If continuous acquisition to multiple specified tube temperatures in difference between any two
It is no more than preset value, then determines to enter the stable operation stage.It should be noted that air conditioner 1 enters stable operation rank
Duan Hou, indices parameter can be sufficiently stable, are not in fluctuation.By taking coil temperature as an example, in stable operation stage, air-conditioning
All kinds of coil temperatures in device 1 are not in fluctuating change on a timeline.Preferably, above-mentioned specified tube temperature includes exhaust temperature
Degree or heat exchanger coil temperature among any one.
Step S102, if enabling second temperature Preservation tactics into the stable operation stage.
In embodiments of the present invention, in stable operation stage, the heat collecting exchanger according to the preset time interval of air conditioner 1
Coil temperature.It is determined how according to collected coil temperature and the working condition of compressor is adjusted.Specifically, such as Fig. 2
Shown, above-mentioned steps S102 may include following sub-step:
Sub-step S1021, the according to the preset time interval coil temperature of heat collecting exchanger.
Sub-step S1022, when the collected coil temperature is higher than the first temperature threshold and is less than second temperature threshold value
When, it controls the compressor and current frequency is maintained to run, and forbid raising frequency.Optionally, above-mentioned first temperature threshold is less than
Two temperature thresholds, above-mentioned temperature threshold can be obtained according to test.In collected coil temperature in the first temperature threshold and
When between two temperature thresholds, the corresponding system pressure of air conditioner 1 has an impact the operation of air conditioner 1 smaller.Although at this point, nothing
The compressor frequency reducing or shutdown of air conditioner 1 need to be controlled, but appoints and so needs that compressor is forbidden to carry out raising frequency.
Sub-step S1023, when the collected coil temperature is higher than the second temperature threshold value and is less than third temperature
When threshold value, the compressor is controlled with the first frequency reducing speed and carries out frequency reducing.Continue during frequency reducing according to the above-mentioned time cycle pair
The coil temperature of heat exchanger is acquired, until the collected coil temperature is lower than second temperature threshold value, controls the pressure
The frequency that contracting machine remains current is run, and no longer lowers the frequency of compressor, but also limits raising frequency.
Sub-step S1024, when the collected coil temperature is higher than the third temperature threshold and less than the 4th temperature
When threshold value, the compressor is controlled with the second frequency reducing speed and carries out frequency reducing.Continue during frequency reducing according to the above-mentioned time cycle pair
The coil temperature of heat exchanger is acquired, until the collected coil temperature is lower than the third temperature threshold, wherein institute
The second frequency reducing speed is stated higher than the first frequency reducing speed.Specifically, it is lower than the third temperature threshold in the coil temperature
And when being higher than second temperature threshold value, control compressor, which is switched to, carries out frequency reducing with the first frequency reducing speed；In the coil temperature
When lower than the second temperature threshold value, control compressor stops frequency reducing, while also forbidding raising frequency.
Sub-step S1025 controls the compressor and stops when the collected coil temperature is higher than four temperature thresholds
It only runs, until the collected coil temperature is lower than preset releasing threshold value, restarts the compressor.It needs to illustrate
, above-mentioned releasing threshold value can be a temperature value less than the first temperature threshold.
In embodiments of the present invention, above-mentioned sub-step S1022 is not to having inevitable sequencing between S1024.
Step S103 starts the first temperature protection strategy if not entering the stable operation stage.
In embodiments of the present invention, there is no inevitable sequencings between step S102 and step S103.Optionally, according to
According to collected coil temperature, the working condition of the compressor of air conditioner 1 is adjusted using the first temperature protection strategy.Tool
Body, the first temperature protection strategy of starting can be realized using following any mode:
(1) coil temperature that the heat exchanger is acquired according to the time interval, when the collected coil temperature is high
In the 5th temperature threshold and when less than six temperature thresholds, controls the compressor and current frequency is maintained to run, forbid raising frequency.
It should be noted that the 5th temperature threshold is not less than first temperature threshold, the 6th temperature threshold is not less than described the
Two temperature thresholds.
When the collected coil temperature is higher than the 6th temperature threshold and when less than seven temperature thresholds, institute is controlled
It states compressor and frequency reducing is carried out with the first frequency reducing speed, continue the disk according to above-mentioned time cycle heat exchanging device during frequency reducing
Tube temperature degree is acquired, until the collected coil temperature is lower than the 6th temperature threshold, is controlled the compressor maintenance and is worked as
Preceding frequency operation, no longer lowers the frequency of compressor, but also limit raising frequency.It should be noted that the 7th temperature threshold is not small
In third temperature threshold.
When the collected coil temperature is higher than the 7th temperature threshold and when less than eight temperature thresholds, the pressure is controlled
Contracting machine carries out frequency reducing with the second frequency reducing speed, until the collected coil temperature is lower than the 7th temperature threshold.
Continue to be acquired according to the coil temperature of above-mentioned time cycle heat exchanging device during frequency reducing, until the collected coil pipe
Temperature is lower than the 7th temperature threshold.Specifically, lower than the 7th temperature threshold and it is higher than the 6th in the coil temperature
When temperature threshold, control compressor, which is switched to, carries out frequency reducing with the first frequency reducing speed；In the coil temperature also below described
When six temperature thresholds, control compressor stops frequency reducing, while also forbidding raising frequency.It should be noted that above-mentioned 8th temperature threshold
Value is not less than the 4th temperature threshold.
When the collected coil temperature is higher than eight temperature threshold, it is out of service to control the compressor,
Until the collected coil temperature is lower than the releasing threshold value, the compressor is restarted.
In the present embodiment, at this time for second temperature Preservation tactics, triggering is improved to compressor operating shape
State control coil temperature threshold value, avoid when not entering the stabilization sub stage, the interim raising of the coil temperature of heat exchanger and accidentally touch
Send out temperature protection.In turn, it avoids and enters by mistake through low-frequency operation state, the influence of refrigeration or heating effect to air conditioner 1.
(2) coil temperature that the heat exchanger is acquired according to the time interval collects in the first lasting duration
Coil temperature when being higher than first temperature threshold and being less than the second temperature threshold value, control the compressor and maintain
Current frequency operation, forbids raising frequency.
The collected coil temperature is higher than the second temperature threshold value and is less than described in the second lasting duration
When third temperature threshold, the compressor is controlled with the first frequency reducing speed and carries out frequency reducing, is continued during frequency reducing according to upper
The coil temperature for stating time cycle heat exchanging device is acquired, until the collected coil temperature is lower than second temperature threshold
Value, controls the compressor and current frequency is maintained to run, and no longer lowers the frequency of compressor, but also limits raising frequency.
The collected coil temperature is higher than the third temperature threshold and is less than described in lasting third duration
When four temperature thresholds, the compressor is controlled with the second frequency reducing speed and carries out frequency reducing, until the collected coil pipe
Temperature is lower than the third temperature threshold.Specifically, lower than the third temperature threshold and it is higher than second in the coil temperature
When temperature threshold, control compressor, which is switched to, carries out frequency reducing with the first frequency reducing speed；In the coil temperature also below described
When two temperature thresholds, control compressor stops frequency reducing, while also forbidding raising frequency.
When the collected coil temperature is higher than four temperature threshold in the 4th lasting duration, described in control
Compressor is out of service, until the collected coil temperature is lower than the releasing threshold value, restarts the compressor.
In the present embodiment, it at this time for second temperature Preservation tactics, by limiting the duration, avoids not
When into the stabilization sub stage, the interim raising of the coil temperature of heat exchanger and false triggering temperature protection.In turn, avoid enter by mistake through it is low
Frequency operating status, the influence of refrigeration or heating effect to air conditioner 1.
(3) coil temperature that the heat exchanger is acquired according to the time interval collects in the first lasting duration
Coil temperature when being higher than the 5th temperature threshold and being less than six temperature threshold, control the compressor and maintain
Current frequency operation, and forbid raising frequency.
The collected coil temperature is higher than the 6th temperature threshold and is less than described in the second lasting duration
When seven temperature thresholds, the compressor is controlled with the first frequency reducing speed and carries out frequency reducing, until collected coil temperature
It lower than the 6th temperature threshold, controls the compressor and current frequency is maintained to run, no longer lower the frequency of compressor, but
Also raising frequency is limited.
The collected coil temperature is higher than the 7th temperature threshold and is less than described in lasting third duration
When eight temperature thresholds, the compressor is controlled with the second frequency reducing speed and carries out frequency reducing, until the collected coil pipe
Temperature is lower than the 7th temperature threshold, specifically, lower than the 7th temperature threshold and is higher than the 6th in the coil temperature
When temperature threshold, control compressor, which is switched to, carries out frequency reducing with the first frequency reducing speed；In the coil temperature also below described
When six temperature thresholds, control compressor stops frequency reducing, while also forbidding raising frequency.
When the collected coil temperature is higher than eight temperature threshold in the 4th lasting duration, described in control
Compressor is out of service, until the collected coil temperature is lower than the releasing threshold value, restarts the compressor.
In the present embodiment, at this time for second temperature Preservation tactics, triggering is not only increased to compressor work
Make the coil temperature threshold value of state control, also the limitation of increase duration.It avoids when not entering the stabilization sub stage, the coil pipe temperature of heat exchanger
It spends interim raising and can be done in terms of false triggering temperature protection more accurate.In turn, it avoids and enters by mistake through low-frequency operation
State, the influence of refrigeration or heating effect to air conditioner 1.
It is further right with one shown in Fig. 3 application example below in order to which the embodiment of the present invention is described in detail
Temperature protection control method provided by the invention is described.It is as shown in Figure 3:
S1 obtains the coil temperature T of compressor current runing time t and heat exchanger.
S2, judges whether runing time t exceeds preset time threshold t1.If entering step S3 beyond process, if without departing from
Process enters step S4.
S3, according to the coil temperature T obtained, using the first temperature protection Developing Tactics compressor operating state.Specifically,
Step S3 may include following sub-step:
S31, judges whether collected coil temperature T is higher than the first temperature threshold T1.If so, process enters sub-step
S32, if it is not, then control compressor includes current operating status.
S32 forbids compressor frequency to rise, and controls compressor and is run with current frequency.
S33, judges whether coil temperature T collected is higher than second temperature threshold value T2.If so, and coil temperature T
Not higher than third temperature threshold T3, process enters sub-step S34；If so, and coil temperature T be higher than third temperature threshold
T3, process enter sub-step S35.If it is not, then keeping current state, that is, keep that compressor frequency is forbidden to rise.
S34 reduces the frequency of compressor with the first frequency reducing speed c1.
S35 reduces the frequency of compressor with the second frequency reducing speed c2.
S36, judges whether coil temperature T is higher than second temperature threshold value T4.If so, control flow enters step S5.Such as
Fruit is not then to keep current operating status.
S4 adjusts compressor operating state using second temperature Preservation tactics according to the coil temperature T obtained.Specifically,
Step S4 may include following sub-step:
S41, judges whether collected coil temperature T is higher than the 5th temperature threshold T5, T5 >=T1.If so, process into
Enter sub-step S42, if it is not, then control compressor includes current operating status.
S42 forbids compressor frequency to rise, and controls compressor and is run with current frequency.
S43, judges whether coil temperature T collected is higher than the 6th temperature threshold T6, T6 >=T2.If so, and the disk
Tube temperature degree T is not higher than the 7th temperature threshold T7, T7 >=T3, and process enters sub-step S44；If so, and coil temperature T be higher than
7th temperature threshold T7, process enter sub-step S45.If it is not, then keeping current state, that is, keep forbidding compressor frequency
Rise.
S44 reduces the frequency of compressor with the first frequency reducing speed c1.
S45 reduces the frequency of compressor with the second frequency reducing speed c2.
S46, judges whether coil temperature T is higher than the 8th temperature threshold T8, T8 >=T4.If so, control flow enters step
Rapid S5.If it is not, then keeping current operating status.
S5 controls compressor shutdown.
Second embodiment
Referring to FIG. 4, Fig. 4 provides a kind of the functional block diagram of air conditioner 1 for inventive embodiments.As shown in figure 4, should
Air conditioner 1 includes:
Determination module 2, for determining whether to enter stable operation stage.
First execution module 3, if starting the first temperature protection strategy for not entering the stable operation stage.
Second execution module 4, if for enabling second temperature Preservation tactics into the stable operation stage, wherein
The second temperature Preservation tactics are different from the trigger condition that the first temperature protection strategy controls compressor.
Preferably, second execution module 4 is specifically used for: the coil pipe temperature of heat collecting exchanger according to the preset time interval
Degree.When the collected coil temperature is higher than the first temperature threshold and is less than second temperature threshold value, the compressor is controlled
It maintains current frequency to run, and forbids raising frequency.When the collected coil temperature is higher than the second temperature threshold value and small
When third temperature threshold, the compressor is controlled with the first frequency reducing speed and carries out frequency reducing, until the collected coil pipe temperature
Degree is lower than the second temperature threshold value.When the collected coil temperature is higher than the third temperature threshold and less than the 4th temperature
When spending threshold value, the compressor is controlled with the second frequency reducing speed and carries out frequency reducing, until the collected coil temperature is lower than institute
State third temperature threshold；Wherein, the second frequency reducing speed is higher than the first frequency reducing speed.When the collected coil pipe temperature
When degree is higher than four temperature threshold, it is out of service to control the compressor, until the collected coil temperature is lower than
Preset releasing threshold value, restarts the compressor.
In conclusion a kind of temperature protection control method provided in an embodiment of the present invention and air conditioner.Wherein, which protects
It protects control method and is applied to air conditioner.The temperature protection control method includes: to determine whether to enter stable operation stage；If not
Into the stable operation stage, then start the first temperature protection strategy；If enabling second into the stable operation stage
Temperature protection strategy, wherein since the second temperature Preservation tactics and the first temperature protection strategy carry out compressor
The trigger condition of control is different, will not be because of so that it is guaranteed that in the case where not entering this special operation phase of stable operation stage
Accidentally reach the trigger condition of conventional second temperature Preservation tactics, and false triggering temperature protection；It, will not in stable operation stage
The effect of temperature protection function is influenced because the corresponding trigger condition of the first temperature protection strategy can not be triggered always.Both ensured
Temperature protection can effectively reduce system pressure, and enhance the reliability of air conditioner.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of temperature protection control method is applied to air conditioner (1), which is characterized in that the temperature protection control method packet
It includes:
Determine whether to enter stable operation stage；
If not entering the stable operation stage, start the first temperature protection strategy；
If enabling second temperature Preservation tactics into the stable operation stage, wherein the second temperature Preservation tactics with
The trigger condition that the first temperature protection strategy controls compressor is different.
2. temperature protection control method according to claim 1, which is characterized in that the enabling second temperature Preservation tactics
Mode include:
The coil temperature of heat collecting exchanger according to the preset time interval；
When the collected coil temperature is higher than the first temperature threshold and is less than second temperature threshold value, the compressor is controlled
It maintains current frequency to run, and forbids raising frequency；
When the collected coil temperature is higher than the second temperature threshold value and is less than third temperature threshold, the pressure is controlled
Contracting machine carries out frequency reducing with the first frequency reducing speed, until the collected coil temperature is lower than the second temperature threshold value；
When the collected coil temperature is higher than the third temperature threshold and when less than four temperature thresholds, the pressure is controlled
Contracting machine carries out frequency reducing with the second frequency reducing speed, until the collected coil temperature is lower than the third temperature threshold；Wherein,
The second frequency reducing speed is higher than the first frequency reducing speed；
When the collected coil temperature is higher than four temperature threshold, it is out of service to control the compressor, until
The collected coil temperature is lower than preset releasing threshold value, restarts the compressor.
3. temperature protection control method according to claim 2, which is characterized in that the first temperature protection strategy of the starting
Mode include:
The coil temperature of the heat exchanger is acquired according to the time interval；
When the collected coil temperature is higher than the 5th temperature threshold and when less than six temperature thresholds, the compressor is controlled
It maintains current frequency to run, and forbids raising frequency；Wherein, the 5th temperature threshold is not less than first temperature threshold, institute
The 6th temperature threshold is stated not less than the second temperature threshold value；
When the collected coil temperature is higher than the 6th temperature threshold and when less than seven temperature thresholds, the pressure is controlled
Contracting machine carries out frequency reducing with the first frequency reducing speed, until the collected coil temperature is lower than the 6th temperature threshold；
7th temperature threshold is not less than the third temperature threshold；
When the collected coil temperature is higher than the 7th temperature threshold and when less than eight temperature thresholds, the pressure is controlled
Contracting machine carries out frequency reducing with the second frequency reducing speed, until the collected coil temperature is lower than the 7th temperature threshold；
Wherein, the 8th temperature threshold is not less than the 4th temperature threshold；
When the collected coil temperature is higher than eight temperature threshold, it is out of service to control the compressor, until
The collected coil temperature is lower than the releasing threshold value, restarts the compressor.
4. temperature protection control method according to claim 2, which is characterized in that the first temperature protection strategy of the starting
Mode include:
The coil temperature of the heat exchanger is acquired according to the time interval；
The collected coil temperature is higher than first temperature threshold and is less than described second in the first lasting duration
When temperature threshold, controls the compressor and current frequency is maintained to run, and forbid raising frequency；
The collected coil temperature is higher than the second temperature threshold value and is less than the third in the second lasting duration
When temperature threshold, the compressor is controlled with the first frequency reducing speed and carries out frequency reducing, until the collected coil temperature
Lower than the second temperature threshold value；
The collected coil temperature is higher than the third temperature threshold and is less than the described 4th in lasting third duration
When temperature threshold, the compressor is controlled with the second frequency reducing speed and carries out frequency reducing, until the collected coil temperature
Lower than the third temperature threshold；
When the collected coil temperature is higher than four temperature threshold in the 4th lasting duration, the compression is controlled
Machine is out of service, until the collected coil temperature is lower than the releasing threshold value, restarts the compressor.
5. temperature protection control method according to claim 2, which is characterized in that the first temperature protection strategy of the starting
Mode include:
The coil temperature of the heat exchanger is acquired according to the time interval；
The collected coil temperature is higher than the 5th temperature threshold and less than the 6th temperature threshold in the first lasting duration
When, it controls the compressor and current frequency is maintained to run, and forbid raising frequency；
The collected coil temperature is higher than the 6th temperature threshold and less than the 7th temperature in the second lasting duration
When threshold value, the compressor is controlled with the first frequency reducing speed and carries out frequency reducing, until the collected coil temperature is lower than
6th temperature threshold；
The collected coil temperature is higher than the 7th temperature threshold and less than the 8th temperature in lasting third duration
When threshold value, the compressor is controlled with the second frequency reducing speed and carries out frequency reducing, until the collected coil temperature is lower than
7th temperature threshold；
When the collected coil temperature is higher than eight temperature threshold in the 4th lasting duration, the compression is controlled
Machine is out of service, until the collected coil temperature is lower than the releasing threshold value, restarts the compressor.
6. temperature protection control method according to claim 1, which is characterized in that described to determine whether to enter stable operation
The mode in stage includes:
Obtain the runing time of compressor；
If the runing time is not more than preset time threshold, judgement does not enter the stable operation stage；
If the runing time is greater than preset time threshold, determine to enter the stable operation stage.
7. temperature protection control method according to claim 1, which is characterized in that described to determine whether to enter stable operation
The mode in stage includes:
The specified tube temperature in the air conditioner (1) is acquired according to the preset period；
If the difference between two neighboring period corresponding specified tube temperature is more than preset value, judgement does not enter described
Stable operation stage；
If continuous acquisition to multiple specified tube temperatures in difference between any two be no more than preset value, determine into
Enter the stable operation stage.
8. temperature protection control method according to claim 7, which is characterized in that the specified tube temperature includes delivery temperature
Or any one among the coil temperature of heat exchanger.
9. a kind of air conditioner, which is characterized in that the air conditioner (1) includes:
Determination module (2), for determining whether to enter stable operation stage；
First execution module (3), if starting the first temperature protection strategy for not entering the stable operation stage；
Second execution module (4), if for enabling second temperature Preservation tactics, wherein institute into the stable operation stage
It is different from the trigger condition that the first temperature protection strategy controls compressor to state second temperature Preservation tactics.
10. air conditioner according to claim 9, which is characterized in that second execution module (4) is specifically used for:
The coil temperature of heat collecting exchanger according to the preset time interval；
When the collected coil temperature is higher than the first temperature threshold and is less than second temperature threshold value, the compressor is controlled
It maintains current frequency to run, and forbids raising frequency；
When the collected coil temperature is higher than the second temperature threshold value and is less than third temperature threshold, the pressure is controlled
Contracting machine carries out frequency reducing with the first frequency reducing speed, until the collected coil temperature is lower than the second temperature threshold value；
When the collected coil temperature is higher than the third temperature threshold and when less than four temperature thresholds, the pressure is controlled
Contracting machine carries out frequency reducing with the second frequency reducing speed, until the collected coil temperature is lower than the third temperature threshold；Wherein,
The second frequency reducing speed is higher than the first frequency reducing speed；
When the collected coil temperature is higher than four temperature threshold, it is out of service to control the compressor, until
The collected coil temperature is lower than preset releasing threshold value, restarts the compressor.
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