CN109323440A - Air conditioner and its condensation prevention control method - Google Patents
Air conditioner and its condensation prevention control method Download PDFInfo
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- CN109323440A CN109323440A CN201811210997.8A CN201811210997A CN109323440A CN 109323440 A CN109323440 A CN 109323440A CN 201811210997 A CN201811210997 A CN 201811210997A CN 109323440 A CN109323440 A CN 109323440A
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- 238000009833 condensation Methods 0.000 title claims abstract description 119
- 230000005494 condensation Effects 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000002265 prevention Effects 0.000 title claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000004364 calculation method Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 13
- 238000007710 freezing Methods 0.000 abstract description 2
- 230000008014 freezing Effects 0.000 abstract description 2
- 238000005057 refrigeration Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 8
- 238000004378 air conditioning Methods 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 238000007791 dehumidification Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000003519 ventilatory effect Effects 0.000 description 2
- 241001274961 Rubus repens Species 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000032696 parturition Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
-
- 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
- F24F11/32—Responding to malfunctions or emergencies
-
- 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
-
- 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
- F24F11/83—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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to a kind of air conditioner and its condensation prevention control method, which includes: to detect indoor environment temperature locating for the air conditioner indoor unit of air conditioner and indoor environment relative humidity under cooling operation mode；When indoor environment temperature is greater than indoor circumstance temperature threshold value and indoor environment relative humidity is greater than indoor humidity threshold value, control air conditioner enters anti-condensation mode.Under anti-condensation mode, the first electronic expansion valve opening is calculated by delivery temperature PID control, the second electronic expansion valve opening is calculated by coil temperature PID control, take smaller in the first electronic expansion valve opening and the second electronic expansion valve opening as the practical aperture of the electric expansion valve of air conditioner, it is not only able to play good anti-condensation effect, but also can be avoided and only lead to the problem of excessively freezing using coil temperature as control parameter in the prior art.In addition, can guarantee that temperature is relatively stable, fluctuation is small by pid control algorithm.
Description
Technical field
The present invention relates to air conditioners, more particularly to the condensation prevention control method and air conditioner of a kind of air conditioner.
Background technique
For air conditioner when with the operation of certain operating conditions, the evaporating temperature of air conditioner indoor unit is often below the air dew of indoor environment
Point temperature, at this moment many condensed waters, the more serious phenomenon of simultaneous condensation can be precipitated in air-conditioning.The basic original that condensation generates
Evaporating temperature because being air-conditioning internal machine heat exchanger is lower than air dew point temperature, and causing the vapor in air to be precipitated to the cold becomes cold
Condensate or dewdrop.Solving air-conditioning condensation problem is always one of the technical problem in air-conditioning products development process.Current is anti-condensation
Dew measure is substantially to account for from two angles of structure and refrigeration system, considers anti-condensation measure also phase from control angle
To less.The method anti-condensation from control angle is substantially the single revolving speed for mechanically improving indoor fan or reduction compression
Unit frequency, these anti-condensation measures often result in the fluctuation of indoor unit evaporating temperature, while being usually associated with the increasing of indoor unit noise
Big or refrigerating capacity reduction.
Summary of the invention
One purpose of first aspect present invention is intended to overcome at least one defect in the prior art, and providing one kind can
Prevent condensation from generating and freezing condensation prevention control method that is excessive and influencing user's refrigeration experience simultaneously.
One of first aspect present invention is further objective is that improve indoor coil under the premise of improving condensation problem
The stability of temperature reduces temperature fluctuation.
Another of first aspect present invention under the premise of improving condensation problem further objective is that guarantee refrigeration effect
Fruit.
The purpose of second aspect of the present invention is to provide one kind can prevent condensation generation and the excessive air conditioner that freezes simultaneously.
According to the first aspect of the invention, the present invention provides a kind of condensation prevention control method of air conditioner, comprising:
Under cooling operation mode, indoor environment temperature locating for the air conditioner indoor unit of the air conditioner and indoor ring are detected
Border relative humidity；
When the indoor environment temperature is greater than indoor circumstance temperature threshold value and the indoor environment relative humidity is greater than indoor humidity
When threshold value, the air conditioner is controlled into anti-condensation mode；And
Under the anti-condensation mode, first is calculated by the delivery temperature PID control of the compressor of the air conditioner
Electronic expansion valve opening calculates the second electronic expansion valve opening by coil temperature PID control, takes first electronic expansion
The practical aperture of smaller in valve opening and second electronic expansion valve opening as the electric expansion valve of the air conditioner.
Optionally, in the coil temperature PID control, target coil temperature is arranged to: Tg=Td+m；Wherein
TgIndicate the target coil temperature, TdIndicate that the air dew point temperature of indoor environment, m are greater than zero；And indoor environment
Air dew point temperature TdIt is got according to the indoor environment temperature and the indoor environment relative humidity calculation.
Optionally, the air dew point temperature T of the indoor environmentdCalculation formula are as follows:
Wherein, T is the indoor environment temperature, and f is the indoor environment relative humidity, and unit %, a and b are coefficient.
Optionally, m is any temperature value of the range between 0.3~0.7 DEG C.
Optionally, the condensation prevention control method further include:
After the air conditioner is with anti-condensation first preset duration of mode operation, according to current indoor environment temperature
Judge whether to meet the condition for exiting anti-condensation mode with indoor environment relative humidity；
If so, exiting anti-condensation mode；If it is not, then alternately running delivery temperature PID control according to the preset period
With anti-condensation mode.
Optionally, exit the condition of anti-condensation mode are as follows: the indoor environment temperature be less than the indoor circumstance temperature threshold value or
The indoor environment relative humidity is less than the indoor humidity threshold value.
Optionally, in delivery temperature PID control, the current exhaust gas temperature of the compressor is obtained, and work as according to described
The deviation of front exhaust temperature and target exhaust temperature calculates first electronic expansion valve opening；
In coil temperature PID control, obtain the coil temperature of the air conditioner indoor unit, and according to the coil temperature with
The deviation of target coil temperature calculates second electronic expansion valve opening.
According to the second aspect of the invention, the present invention also provides a kind of air conditioners, comprising:
Detection module, for detecting indoor environment locating for the air conditioner indoor unit of the air conditioner under cooling operation mode
Temperature and indoor environment relative humidity；
Control module is used to be greater than indoor circumstance temperature threshold value in the indoor environment temperature and the indoor environment is relatively wet
Degree controls the air conditioner into anti-condensation mode when being greater than indoor humidity threshold value；
Under the anti-condensation mode, the aperture of the electric expansion valve of the air conditioner is selected as the exhaust by compressor
Temperature PID control calculates the first electronic expansion valve opening and calculates the second electric expansion valve by coil temperature PID control
Smaller in aperture.
Optionally, in the coil temperature PID control, target coil temperature is set greater than according to the indoor environment
The air dew point temperature for the indoor environment that temperature and the indoor environment relative humidity calculation are got.
Optionally, the control module is configured to when the air conditioner is with anti-condensation first preset duration of mode operation
It is still unsatisfactory for controlling the air conditioner afterwards when exiting the condition of anti-condensation mode and alternately runs exhaust temperature according to the preset period
Spend PID control and anti-condensation mode.
In condensation prevention control method of the invention, enter anti-condensation mode when certain conditions are met, in anti-condensation mould
Under formula, electric expansion valve is calculated separately by the delivery temperature PID control of compressor and the coil temperature PID control of indoor unit
Aperture all takes into account delivery temperature and coil temperature, takes wherein aperture of the lesser value as electric expansion valve, not only can
Good anti-condensation effect is enough played, but also can be avoided and only caused in the prior art using coil temperature as control parameter
The problem of degree refrigeration.In addition, can guarantee that temperature is relatively stable, fluctuation is small by pid control algorithm.
Further, since indoor environment temperature, envionmental humidity are variations, the air dew of indoor environment
Point temperature is also variation.For this purpose, target coil temperature is not such as the prior art in the coil temperature PID control of the application
In be arranged to certain value like that, but be set to the variable for being consistently higher than air dew point temperature certain value, ensure that
The coil temperature of indoor unit certain value higher than air dew point temperature always, not only effectively prevents the generation of condensation, but also mention
The high stability of indoor coil pipe, reduces fluctuations in indoor temperature.
Further, if air conditioner after anti-condensation the first preset duration of mode operation to be still unsatisfactory for exiting anti-condensation mode
Condition delivery temperature PID control and anti-condensation will be alternately run according to the preset period at this point, in order to guarantee refrigeration effect
Dew mode is not only able to improve condensation problem by anti-condensation mode, but also ensure that substantially by delivery temperature PID control
Refrigeration effect.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Detailed description of the invention
Some specific embodiments of the present invention is described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter.
Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached drawing:
Fig. 1 is the schematic flow chart of the condensation prevention control method of a next air conditioner according to the present invention；
Fig. 2 is the control block diagram that air conditioner according to an embodiment of the invention is under anti-condensation mode；
Fig. 3 is delivery temperature PID control block diagram according to an embodiment of the invention；
Fig. 4 is coil temperature PID control block diagram according to an embodiment of the invention；
Fig. 5 is the schematic block diagram of air conditioner according to an embodiment of the invention.
Specific embodiment
Present invention firstly provides a kind of condensation prevention control methods of air conditioner.Fig. 1 be according to the present invention one it is described come
The schematic flow chart of the condensation prevention control method of air conditioner.
Referring to Fig. 1, the condensation prevention control method of air conditioner of the invention includes:
Under cooling operation mode, indoor environment temperature locating for the air conditioner indoor unit of air conditioner and indoor environment phase are detected
To humidity；
When indoor environment temperature is greater than indoor circumstance temperature threshold value and indoor environment relative humidity is greater than indoor humidity threshold value,
It controls air conditioner and enters anti-condensation mode.
It is understood that indoor circumstance temperature threshold value and indoor humidity threshold value are the application regions according to indoor unit and preparatory
The definite value set.Since condensation is often to generate under conditions of high temperature and humidity, indoor circumstance temperature threshold value can choose
For any temperature value between 24~28 DEG C, indoor humidity threshold value be can choose as any relative humidity between 50~70%
Value.
After user opens air conditioner, its operating mode of air conditioner real-time detection.The operating mode of air conditioner generally comprises
Refrigeration mode, heating mode, dehumidification mode, ventilatory pattern etc..When air conditioner is in heating mode or ventilatory pattern, air-conditioning
Device will not generally generate dew condensation phenomenon.When air conditioner is in refrigeration mode or dehumidification mode, if space locating for air conditioner is wet
Dew condensation phenomenon is easy to appear when spending higher.Cooling operation mode in the present invention not only includes the refrigeration mode on conventional meaning,
It further include dehumidification mode.It obtains indoor environment temperature locating for air conditioner indoor unit and indoor environment relative humidity is to judge condensation
It generates and reference frame is provided.
The evaporating temperature of the heat exchanger of air conditioner indoor unit is approximately equal to the coil temperature of the heat exchanger, which can lead to
It crosses the temperature sensor being arranged in heat exchanger coils to obtain, therefore coil pipe can be adjusted by controlling the aperture of electric expansion valve
Temperature, to avoid the generation of condensation.
Fig. 2 is the control block diagram that air conditioner according to an embodiment of the invention is under anti-condensation mode.Particularly, exist
Under anti-condensation mode, the first electronic expansion valve opening X is calculated by the delivery temperature PID control of compressor1, pass through coil pipe temperature
Degree PID control calculates the second electronic expansion valve opening X2, take the first electronic expansion valve opening X1With the second electronic expansion valve opening
X2In smaller as air conditioner electric expansion valve practical aperture X.That is, passing through delivery temperature and coil temperature
Two pid control algorithms determine the aperture of electric expansion valve jointly.
In condensation prevention control method of the invention, enter anti-condensation mode when certain conditions are met, in anti-condensation mould
Under formula, electric expansion valve is calculated separately by the delivery temperature PID control of compressor and the coil temperature PID control of indoor unit
Aperture all takes into account delivery temperature and coil temperature, takes wherein aperture of the lesser value as electric expansion valve, not only can
Good anti-condensation effect is enough played, but also can be avoided and only caused in the prior art using coil temperature as control parameter
The problem of degree refrigeration.In addition, can guarantee that temperature is relatively stable, fluctuation is small by pid control algorithm.
Fig. 3 is delivery temperature PID control block diagram according to an embodiment of the invention, and Fig. 4 is a reality according to the present invention
Apply the coil temperature PID control block diagram of example.
Referring to Fig. 3, in delivery temperature PID control, the current exhaust gas temperature of compressor is obtained, and work as according to what is detected
The deviation of front exhaust temperature and target exhaust temperature calculates the first electronic expansion valve opening, and the delivery temperature of compressor can pass through row
Gas sensor obtains.
Referring to fig. 4, in coil temperature PID control, obtain the coil temperature of air conditioner indoor unit, and according to coil temperature with
The deviation of target coil temperature calculates the second electronic expansion valve opening, and the coil temperature of air conditioner indoor unit can pass through coil pipe sensor
To obtain.
Since indoor environment temperature, envionmental humidity are variations, the air dew point temperature of indoor environment is also
Variation.For this purpose, in some embodiments of the invention, by target coil temperature and real-time calculated air dew point temperature phase
Association, it can be ensured that no matter how room temperature, humidity change, and indoor unit will not generate condensation always.Specifically, in coil temperature
In PID control, target coil temperature is arranged to: Tg=Td+m；Wherein, TgIndicate target coil temperature, TdIndicate indoor environment
Air dew point temperature, m be greater than zero, that is to say, that be arranged to target coil temperature to be consistently higher than air dew point temperature.It is indoor
The air dew point temperature T of environmentdCan according to real-time detection to indoor environment temperature and indoor environment relative humidity calculation get.
That is, target coil temperature is not as in the state of the art in the coil temperature PID control of the application
It is arranged to certain value, but is set to the variable for being consistently higher than air dew point temperature certain value, ensures that indoor unit
Coil temperature certain value higher than air dew point temperature always, can there are other situation (such as when considering refrigeration effects)
It is enough effectively prevented the generation of condensation, and also improves the stability of indoor coil pipe, reduces fluctuations in indoor temperature.
In some specific embodiments, m can be any temperature value of the range between 0.3~0.7 DEG C, i.e. destination disk
Tube temperature degree is slightly higher than current air dew point temperature.Such as the value of m can be 0.3 DEG C, 0.4 DEG C, 0.5 DEG C, 0.6 DEG C
Or 0.7 DEG C.
The calculating of air dew point temperature in the prior art is usually a kind of extensive approximate estimation, and in calculation formula only
There is this variable of temperature, calculates the air dew point temperature obtained in this way and actual air dew point temperature difference is larger, Wu Fawei
The anti-condensation control of air conditioner provides accurate reference frame.
In some embodiments of the invention, by indoor environment temperature and indoor environment relative humidity collectively as variograph
Air dew point temperature is calculated, accuracy is higher.Specifically, the air dew point temperature T of indoor environmentdCalculation formula are as follows:
Wherein, T is indoor environment temperature, and f is indoor environment relative humidity, and unit %, a and b are coefficient.Specifically,
When indoor environment temperature is greater than zero (water surface), the value of two coefficients of a, b can be a=7.5, b=237.3；When indoor ring
When border temperature is less than or equal to zero (ice face), the value of two coefficients of a, b can be a=9.5, b=265.5.Due to air conditioner
The phenomenon that generating condensation occurs under air conditioner cooling operation mode, and indoor environment temperature is relatively high at this time, therefore, in this hair
In the formula of the bright air dew point temperature for calculating indoor environment, the value of two coefficients of a, b is a=7.5, b=237.3.
In some embodiments, condensation prevention control method of the invention may further comprise:
After air conditioner is with anti-condensation the first preset duration of mode operation, according to current indoor environment temperature and indoor ring
Border relative humidity judges whether to meet the condition for exiting anti-condensation mode；
If so, exiting anti-condensation mode；If it is not, then alternately running delivery temperature PID control according to the preset period
With anti-condensation mode.
That is, if air conditioner after anti-condensation the first preset duration of mode operation to be still unsatisfactory for exiting anti-condensation mode
Condition delivery temperature PID control and anti-condensation will be alternately run according to the preset period at this point, in order to guarantee refrigeration effect
Dew mode.It is not only able to improve condensation problem by anti-condensation mode as a result, but also is guaranteed by delivery temperature PID control
Basic refrigeration effect.
Specifically, when air conditioner after anti-condensation the first preset duration of mode operation to be still unsatisfactory for exiting anti-condensation mode
When condition, the mode that air conditioner can be switched to delivery temperature PID control is avoided with guaranteeing basic refrigeration effect because anti-condensation
Reveal and the refrigeration experience of user is produced bigger effect.After mode operation predetermined time of the air conditioner with delivery temperature PID control,
Anti-condensation mode is switched to, again to improve the condensation problem of air conditioner indoor unit.When air conditioner is with the pre- timing of anti-condensation mode operation
Between after, then the mode of delivery temperature PID control is switched to, repeatedly, until meeting the condition for exiting anti-condensation mode.First
The length and delivery temperature PID control of preset duration and the alternate cycle of anti-condensation mode can be according to practical air conditioners
Type is set, for example, the first preset duration can be 30min, the alternate cycle of delivery temperature PID control and anti-condensation mode
It may be 30min, i.e., according to switching to another mode again after a certain mode operation 30min.
In some embodiments of the invention, the condition of anti-condensation mode is exited are as follows: indoor environment temperature is less than indoor ring
Warm threshold value or indoor environment relative humidity are less than indoor humidity threshold value.That is, any of above-mentioned two condition is expired
When sufficient, air conditioner indoor unit just will not at least generate more serious dew condensation phenomenon, therefore can exit anti-condensation mode, carry out normal
Cooling operation mode.
Specifically, when air conditioner detects that indoor environment temperature is less than indoor circumstance temperature threshold value, illustrate indoor environment at this time
Temperature be not it is very high, the difference of the coil temperature of indoor environment temperature and indoor unit is also relatively small.In this case, it produces
Therefore a possibility that giving birth to condensation very little can exit anti-condensation mode, and the state of air conditioner is adjusted to anti-condensation mode at this time
Initial mode before.
When indoor environment relative humidity is less than indoor humidity threshold value, illustrate that the relative humidity of indoor environment at this time is not very
Greatly, in this case, air conditioner is not likely to produce condensation.Therefore, anti-condensation mode can be exited at this time, and by the state of air conditioner
Adjust the initial mode to before anti-condensation mode.
The present invention also provides a kind of air conditioner, Fig. 5 is the schematic structure of air conditioner according to an embodiment of the invention
Block diagram.Referring to Fig. 5, air conditioner 1 of the invention may include detection module 10 and control module 20.Certainly, air conditioner 1 further includes pressure
Contracting machine and the electric expansion valve 30 being connected with control module 20, to adjust the aperture of electric expansion valve 30 by control module 20.
Detection module 20 under cooling operation mode for detecting indoor environment temperature locating for the air conditioner indoor unit of air conditioner 1
Degree and indoor environment relative humidity.Specifically, detection module 20 may include the temperature sensor for detecting indoor environment temperature
With the humidity sensor for detecting indoor environment relative humidity.
Control module 20 is greater than indoor circumstance temperature threshold value for environment temperature indoors and indoor environment relative humidity is greater than room
Air conditioner 1 is controlled when interior humidity threshold enters anti-condensation mode.Under anti-condensation mode, the electronic expansion valve opening of air conditioner 1
It is selected as and the first compressor frequency is calculated by delivery temperature PID control and calculates second by coil temperature PID control
Smaller in compressor frequency.
Further, detection module 20 is also used to obtain the delivery temperature and indoor unit of compressor under cooling operation mode
Coil temperature.At this point, detection module 20 further includes exhaust sensor for obtaining the delivery temperature of compressor and for obtaining
Take the coil pipe sensor of coil temperature.
Further, air conditioner 1 further includes delivery temperature PID controller, use in delivery temperature pid control algorithm
Coil temperature PID controller in coil temperature pid control algorithm.
In some embodiments of the invention, in coil temperature PID control, target coil temperature is set greater than basis
The air dew point temperature for the indoor environment that indoor environment temperature and indoor environment relative humidity calculation are got, to ensure indoor unit
Coil temperature certain value higher than air dew point temperature always, can there are other situation (such as when considering refrigeration effects)
It is effectively prevented the generation of condensation, and also improves the stability of indoor coil pipe, reduces fluctuations in indoor temperature.
In some embodiments of the invention, control module 20 is configured to when air conditioner 1 is with anti-condensation mode operation the
Air conditioner 1 is controlled when being still unsatisfactory for exiting the condition of anti-condensation mode after one preset duration alternately to run according to the preset period
Delivery temperature PID control and anti-condensation mode are not only able to improve condensation problem by anti-condensation mode, but also pass through exhaust
Temperature PID control ensure that basic refrigeration effect.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all such other variations or modifications.
Claims (10)
1. a kind of condensation prevention control method of air conditioner, comprising:
Under cooling operation mode, indoor environment temperature locating for the air conditioner indoor unit of the air conditioner and indoor environment phase are detected
To humidity；
When the indoor environment temperature is greater than indoor circumstance temperature threshold value and the indoor environment relative humidity is greater than indoor humidity threshold value
When, the air conditioner is controlled into anti-condensation mode；And
Under the anti-condensation mode, the first electronics is calculated by the delivery temperature PID control of the compressor of the air conditioner
Expansion valve opening calculates the second electronic expansion valve opening by coil temperature PID control, and first electric expansion valve is taken to open
Practical aperture of the degree with the smaller in second electronic expansion valve opening as the electric expansion valve of the air conditioner.
2. condensation prevention control method according to claim 1, wherein
In the coil temperature PID control, target coil temperature is arranged to: Tg=Td+m；Wherein
TgIndicate the target coil temperature, TdIndicate that the air dew point temperature of indoor environment, m are greater than zero；And the sky of indoor environment
Gas dew-point temperature TdIt is got according to the indoor environment temperature and the indoor environment relative humidity calculation.
3. condensation prevention control method according to claim 2, wherein
The air dew point temperature T of the indoor environmentdCalculation formula are as follows:
Wherein, T is the indoor environment temperature, and f is the indoor environment relative humidity, and unit %, a and b are coefficient.
4. condensation prevention control method according to claim 2, wherein
M is any temperature value of the range between 0.3~0.7 DEG C.
5. condensation prevention control method according to claim 1, further includes:
After the air conditioner is with anti-condensation first preset duration of mode operation, according to current indoor environment temperature and room
Interior envionmental humidity judges whether to meet the condition for exiting anti-condensation mode；
If so, exiting anti-condensation mode；If it is not, then alternately running delivery temperature PID control according to the preset period and preventing
Condensation mode.
6. condensation prevention control method according to claim 5, wherein
Exit the condition of anti-condensation mode are as follows: the indoor environment temperature is less than the indoor circumstance temperature threshold value or the indoor environment
Relative humidity is less than the indoor humidity threshold value.
7. condensation prevention control method according to claim 1, wherein
In delivery temperature PID control, obtain the current exhaust gas temperature of the compressor, and according to the current exhaust gas temperature with
The deviation of target exhaust temperature calculates first electronic expansion valve opening；
In coil temperature PID control, the coil temperature of the air conditioner indoor unit is obtained, and according to the coil temperature and target
The deviation of coil temperature calculates second electronic expansion valve opening.
8. a kind of air conditioner, comprising:
Detection module, for detecting indoor environment temperature locating for the air conditioner indoor unit of the air conditioner under cooling operation mode
With indoor environment relative humidity；And
Control module is used to be greater than indoor circumstance temperature threshold value in the indoor environment temperature and the indoor environment relative humidity is big
The air conditioner is controlled when indoor humidity threshold value into anti-condensation mode；Wherein
Under the anti-condensation mode, the aperture of the electric expansion valve of the air conditioner is selected as the delivery temperature by compressor
PID control calculates the first electronic expansion valve opening and calculates the second electronic expansion valve opening by coil temperature PID control
In smaller.
9. air conditioner according to claim 8, wherein
In the coil temperature PID control, target coil temperature is set greater than according to the indoor environment temperature and described
The air dew point temperature for the indoor environment that indoor environment relative humidity calculation is got.
10. air conditioner according to claim 8, wherein
The control module is configured to when the air conditioner after anti-condensation first preset duration of mode operation to be still unsatisfactory for
Controlled when exiting the condition of anti-condensation mode the air conditioner according to the preset period alternately run delivery temperature PID control and
Anti-condensation mode.
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