CN112178889B - Temperature and humidity control method of air conditioner and air conditioner - Google Patents

Temperature and humidity control method of air conditioner and air conditioner Download PDF

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Publication number
CN112178889B
CN112178889B CN202011045199.1A CN202011045199A CN112178889B CN 112178889 B CN112178889 B CN 112178889B CN 202011045199 A CN202011045199 A CN 202011045199A CN 112178889 B CN112178889 B CN 112178889B
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temperature
current
indoor
dew point
target
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CN112178889A (en
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郑波
吕如兵
黄健贵
梁祥飞
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • 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
    • F24F2140/40—Damper positions, e.g. open or closed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention relates to the technical field of air conditioners, in particular to a temperature and humidity control method of an air conditioner and the air conditioner. The four operation modes of the invention can adapt to different requirements, directly control the temperature of the heat exchanger of the air conditioner to be equal to the dew point temperature corresponding to the indoor set temperature and the indoor set humidity or the weighted average value of the dew point temperature and the current dew point temperature, realize quick dehumidification, improve the comfort level of users, and give consideration to temperature control and humidity control by controlling the frequency of the compressor.

Description

Temperature and humidity control method of air conditioner and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a temperature and humidity control method of an air conditioner and the air conditioner.
Background
An air conditioner, i.e., an air conditioner, is an apparatus for manually adjusting and controlling parameters such as temperature, humidity, cleanliness, and the like of ambient air in a building or a structure. The air conditioner generally comprises a cold source/heat source device, a cold and hot medium delivery and distribution system, a tail end device and other auxiliary devices. The control method of the existing household variable frequency air conditioner mainly takes temperature as a controlled parameter. When the air conditioner operates in a refrigerating mode, due to the fact that two processes of cooling and dehumidifying exist when air flows through the evaporator, the temperature of the air conditioning room is controlled singly, and the influence of humidity on human comfort is ignored. According to the literature, under the same room temperature and at 26 ℃, the human body heat sensation is enhanced and the comfort is reduced along with the increase of the room relative humidity. Especially for the high-temperature and high-humidity south China and south China in summer, the air conditioner takes the temperature as a controlled parameter, the room humidity is high when the set temperature is high, the human body comfort is poor, and in order to meet the cooling requirement, a plurality of users reduce the set temperature, so that the room dehumidification capacity is increased, and the power consumption is increased. In order to avoid the problem, a technology for adjusting the temperature and the humidity simultaneously appears at present, most of the existing technical schemes determine the target moisture content according to the set indoor temperature and the set indoor humidity, and determine dehumidification or non-dehumidification (moisture preservation) according to the relative size of the current moisture content and the target moisture content, the whole adjusting and controlling process is long in time, the humidity cannot be reduced quickly when the temperature does not reach the set temperature, and the comfort level of a user in the process is difficult to improve. In addition, in the control process, according to the use habits of most users, the rotating speed of the indoor fan is often set by the users and cannot be adjusted, so that a blank area exists in the control process.
Disclosure of Invention
In order to solve the problems, the invention provides a temperature and humidity control method of an air conditioner and also provides an air conditioner applying the temperature and humidity control method of the air conditioner.
The invention is realized by adopting the following scheme:
a temperature and humidity control method of an air conditioner calculates the current moisture content and the current dew point temperature according to the current indoor temperature and the current indoor relative humidity; calculating target indoor moisture content and target dew point temperature according to the indoor set temperature and the indoor set humidity, or calculating the target indoor moisture content and the target dew point temperature by acquiring default indoor temperature and/or indoor humidity; selecting a preset operation mode of the air conditioner according to the relative sizes of the current indoor temperature and the target temperature, the relative sizes of the current moisture content and the target moisture content or the relative sizes of the current dew point temperature and the target dew point temperature; or selecting a preset operation mode of the air conditioner according to the relative size of the difference value between the current indoor temperature and the target temperature and the floating threshold, the relative size of the difference value between the current moisture content and the target moisture content and the floating threshold, or the relative size of the difference value between the current dew point temperature and the target dew point temperature and the floating threshold; after a preset operation mode is selected, the rotating speed of an indoor fan and/or the frequency of a compressor are/is adjusted according to the relative size of the current dew point temperature and the target dew point temperature; the preset operation mode of the air conditioner comprises cooling and dehumidifying, cooling and non-dehumidifying, dehumidifying and non-cooling, and non-cooling and non-dehumidifying.
Further, the adjusting the rotating speed of the indoor fan according to the relative magnitude of the current dew point temperature and the target dew point temperature means: according to the difference value between the current dew point temperature and the target dew point temperature and the relative size of a preset threshold value, adjusting the rotating speed of the indoor fan according to the condition that the temperature of the indoor heat exchanger is equal to the target dew point temperature or equal to the weighted average value of the current dew point temperature and the target dew point temperature; adjusting the frequency of the compressor according to the relative magnitudes of the current dew point temperature and the target dew point temperature means that: and adjusting the frequency of the compressor according to the difference value between the current dew point temperature and the target dew point temperature and the relative size of a preset threshold value, wherein the temperature of the indoor heat exchanger is equal to the target dew point temperature or equal to the weighted average value of the current dew point temperature and the target dew point temperature.
Further, the method comprises the following steps:
s1, detecting the current indoor temperature TinCurrent indoor relative humidity RHinIndoor set temperature TIs provided withIndoor set humidity RHIs provided withIndoor heat exchanger temperature Te；
S2, according to the current indoor temperature TinAnd the current indoor relative humidity RHinCalculating to obtain the current indoor moisture content dinAnd the current dew point temperature Tl-CurrentAccording to the indoor set temperature TIs provided withAnd indoor set humidity RHIs provided withCalculating to obtain the moisture content d in the target chamberIs provided withAnd target dew point temperature Tl-target；
S3, judging the indoor temperatureTinAnd indoor set temperature TIs provided withRelative size of (d) to determine the indoor moisture contentinAnd target indoor moisture content dIs provided withRelative magnitude of or current dew point temperature Tl-CurrentAnd target dew point temperature Tl-targetThe relative size of (d);
s4, when T isin＞TIs provided withAnd d isin＞dIs provided withOr Tin＞TIs provided withAnd Tl-Current>Tl-targetWhen the temperature is reduced, the mode of cooling and dehumidification is executed, and when T isin＞TIs provided withAnd d isin≤dIs provided withOr Tin＞TIs provided withAnd Tl-Current≤Tl-targetWhen the temperature is reduced, the mode of non-dehumidification is executed, and when T is usedin≤TIs provided withAnd d isin＞dIs provided withOr Tin≤TIs provided withAnd Tl-Current>Tl-targetWhen the temperature is not reduced, a dehumidification mode is executed, and when T is usedin≤TIs provided withAnd d isin≤dIs provided withOr Tin≤TIs provided withAnd Tl-Current≤Tl-targetWhen the temperature is not reduced, a mode of not dehumidifying is executed; or when T isin＞TIs provided with+ floating thresholds X and din＞dIs provided with+ Floating threshold Y or Tin＞TIs provided with+ floating threshold X and Tl-Current>Tl-target+ a floating threshold value Z, a cooling and dehumidifying mode is executed, and T isin＞TIs provided with+ floating thresholds X and din≤dIs provided withA floating threshold Y or Tin＞TIs provided with+ floating threshold X and Tl-Current≤Tl-target-a floating threshold value Z, a cooling and non-dehumidification mode is performed, when Tin≤TIs provided with-floating threshold X and din＞dIs provided with+ Floating threshold Y or Tin≤TIs provided with-floating threshold X and Tl-Current>Tl-target+ a floating threshold value Z, executing a mode of dehumidification without temperature reduction, and when T isin≤TIs provided with-floating threshold X and din≤dIs provided withA floating threshold Y or Tin≤TIs provided with-floating threshold X and Tl-Current≤Tl-targetFloating threshold Z, a mode is performed in which no cooling and no dehumidification takes place.
Further, the cooling and dehumidifying mode comprises the following steps:
a1, detecting the current air conditioner windshield, if the current air conditioner windshield is a free windshield, turning to the step A2, and if the current air conditioner windshield is a non-free windshield, turning to the step A3;
a2, setting the rotating speed of the indoor extension set of the air conditioner as the lowest rotating speed corresponding to the current operating condition;
a3, judgment Tl-Current≥Tl-targetWhether + α is true, if yes, go to step a4, if not, go to step a 6;
a4, judgment Te≤（aTl-Current+ bTl-target) If yes, the step goes to step A5, and if not, the step goes to step A8;
a5, judgment Te≤（aTl-Current+ bTl-target) If yes, the process goes to step A9, and if not, the process goes to step A10;
a6, judgment Te≤Tl-targetIf true, go to step A7 if true, otherwise go to step A8;
a7, judgment Te≤Tl-target-if β is true, if yes, go to step a9, otherwise go to step a 10;
a8, increasing the frequency of the compressor, and turning to the step S1;
a9, reducing the frequency of the compressor, and turning to the step S1;
a10, the current operation state is maintained, and the process goes to step S1.
Further, the cooling and non-dehumidifying mode comprises the following steps:
b1, detecting the current air conditioner windshield, if the current air conditioner windshield is a free windshield, turning to the step B2, and if the current air conditioner windshield is a non-free windshield, turning to the step B3;
b2, setting the rotating speed of the indoor fan of the air conditioner as the highest rotating speed corresponding to the current operating condition;
b3, judgment Tl-Current≤Tl-target-whether or not alpha is true, if so, the step of steeringB4, if not, turning to the step B6;
b4, judgment Te≥（aTl-Current+ bTl-target) If yes, go to step B5, otherwise go to step B8;
b5, judgment Te≥（aTl-Current+ bTl-target) If yes, the process goes to step B9, and if not, the process goes to step B10;
b6, judgment Te≥Tl-targetIf true, go to step B7 if true, otherwise go to step B8;
b7, judgment Te≥Tl-targetIf + β is true, go to step B9 if yes, go to step B10 if not;
b8, increasing the frequency of the compressor, and turning to the step S1;
b9, the compressor is switched to the frequency reduction mode, and the step S1 is turned to;
b10, the current operation state is maintained, and the process goes to step S1.
Further, the dehumidification cooling-free mode comprises the following steps:
c1, detecting the current air conditioner windshield, if the current air conditioner windshield is a free windshield, turning to the step C2, and if the current air conditioner windshield is a non-free windshield, turning to the step C3;
c2, setting the rotating speed of the indoor fan of the air conditioner as the lowest rotating speed corresponding to the current operating condition;
c3, judgment Tl-Current≥Tl-targetWhether + α is true, if yes, go to step C4, and if not, go to step C6;
c4, judgment Te≤（aTl-Current+ bTl-target) If yes, the step goes to step B5, and if not, the step goes to step C8;
c5, judgment Te≤（aTl-Current+ bTl-target) If yes, the process goes to step C9, and if not, the process goes to step C10;
c6, judgment Te≤Tl-targetWhether or not it is true, if soGo to step B7, otherwise go to step C8;
c7, judgment Te≤Tl-target-if β is true, if yes, go to step C9, if not go to step C10;
c8, raising the frequency of the compressor, and turning to the step C11;
c9, reducing the frequency of the compressor, and turning to the step C11;
c10, keeping the current running state, and turning to the step C11;
c11, according to indoor temperature TinAnd indoor set temperature TIs provided withThe relative magnitude of (2) is determined whether or not the stop condition is satisfied, and if so, the stop is performed, and if not, the process returns to step S1.
Further, the mode of not cooling and not dehumidifying comprises the following steps:
d1, judgment of Te≥Tl-CurrentIf true, go to step D2;
d2, judgment of Te≥Tl-CurrentIf + δ is true, the process goes to step D3;
d3, reducing the frequency of the compressor, and turning to the step D6;
d4, raising the frequency of the compressor, and turning to the step D6;
d5, keeping the current running state, and turning to the step D6;
d6, according to the indoor temperature TinAnd indoor set temperature TIs provided withThe relative magnitude of (2) is determined whether or not the stop condition is satisfied, and if so, the stop is performed, and if not, the process returns to step S1.
Further, in the step D3, if the rotation speed of the indoor fan of the air conditioner is adjustable, the rotation speed of the fan is synchronously reduced, and in the step D4, if the rotation speed of the indoor fan of the air conditioner is adjustable, the rotation speed of the fan is synchronously increased.
Further, the default target temperature is preset to be 24-28 ℃; the default target relative humidity is preset to be 40-70%.
An air conditioner applies the temperature and humidity control method of the air conditioner.
Compared with the prior art, the invention has the following beneficial effects:
the invention judges the operation mode of the air conditioner according to the relative size of the current indoor temperature and the indoor set temperature and the relative size of the current indoor moisture content and the target indoor moisture content, flexibly adapts to the requirements of different conditions, and simultaneously leads the temperature of the heat exchanger of the air conditioner to be equal to the dew point temperature corresponding to the indoor set temperature and the indoor set humidity or the weighted average value of the dew point temperature and the current dew point temperature by directly controlling the temperature of the heat exchanger of the air conditioner, thereby realizing rapid dehumidification and improving the comfort level of users in the cooling process. In addition, under the condition that a user sets a windshield, the invention can control both temperature and humidity by controlling the frequency of the compressor, thereby meeting the separate control requirements of temperature and humidity.
Drawings
Fig. 1 is a flowchart illustrating mode determination of a temperature and humidity control method of an air conditioner according to the present invention.
FIG. 2 is a control flow chart of the cooling and dehumidifying mode according to the present invention.
FIG. 3 is a control flow chart of the cooling and non-dehumidifying mode according to the present invention.
FIG. 4 is a control flow chart of the dehumidification no-cool mode of the present invention.
FIG. 5 is a control flow chart of the mode of no cooling and no dehumidification according to the present invention.
Detailed Description
To facilitate an understanding of the present invention for those skilled in the art, the present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.
Referring to fig. 1 to 5, according to the temperature and humidity control method of an air conditioner provided by the present invention, a current moisture content and a current dew point temperature are calculated according to a current indoor temperature and a current indoor relative humidity; calculating target indoor moisture content and target dew point temperature according to the indoor set temperature and the indoor set humidity, or calculating the target indoor moisture content and the target dew point temperature by acquiring default indoor temperature and/or indoor humidity; selecting a preset operation mode of the air conditioner according to the relative sizes of the current indoor temperature and the target temperature, the relative sizes of the current moisture content and the target moisture content or the relative sizes of the current dew point temperature and the target dew point temperature, or selecting the preset operation mode of the air conditioner according to the relative sizes of the difference value of the current indoor temperature and the target temperature and the floating threshold value, the relative sizes of the difference value of the current moisture content and the target moisture content and the floating threshold value or the relative sizes of the difference value of the current dew point temperature and the target dew point temperature and the floating threshold value, namely selecting a mode of not increasing the floating threshold value during judgment and selecting a mode of increasing the floating threshold value. And after the preset operation mode is selected, the rotating speed of the indoor fan or the frequency of the compressor is adjusted according to the relative size of the current dew point temperature and the target dew point temperature. The preset operation mode of the air conditioner comprises cooling and dehumidifying, cooling and non-dehumidifying, dehumidifying and non-cooling, and non-cooling and non-dehumidifying.
The default target temperature is preset to be 24-28 ℃; the default target relative humidity is preset to be 40-70%. This operation is to consider that there may be a case where the user has not performed the setting, because the air conditioner can realize the auto-sensing, auto-setting in the trend of further intelligent development of the air conditioner, and thus the default ranges of the target temperature and the target relative humidity are set for this case.
The step of adjusting the rotating speed of the indoor fan according to the relative size of the current dew point temperature and the target dew point temperature is as follows: according to the difference value between the current dew point temperature and the target dew point temperature and the relative size of a preset threshold value, adjusting the rotating speed of the indoor fan according to the condition that the temperature of the indoor heat exchanger is equal to the target dew point temperature or equal to the weighted average value of the current dew point temperature and the target dew point temperature; adjusting the frequency of the compressor according to the relative magnitudes of the current dew point temperature and the target dew point temperature means that: and adjusting the frequency of the compressor according to the difference value between the current dew point temperature and the target dew point temperature and the relative size of a preset threshold value, wherein the temperature of the indoor heat exchanger is equal to the target dew point temperature or equal to the weighted average value of the current dew point temperature and the target dew point temperature. And in the cooling and dehumidifying mode, the cooling and dehumidifying mode and the dehumidifying and non-cooling mode, the rotating speed of the fan or the frequency of the compressor are adjusted according to the above, and in the non-cooling and non-dehumidifying mode, the frequency of the compressor or the rotating speed of the indoor fan is directly adjusted according to the relative size of the temperature of the heat exchanger and the current dew point temperature.
The method comprises the following steps:
s1, testMeasuring the current indoor temperature TinCurrent indoor relative humidity RHinIndoor set temperature TIs provided withIndoor set humidity RHIs provided withIndoor heat exchanger temperature Te；
S2, according to the current indoor temperature TinAnd the current indoor relative humidity RHinCalculating to obtain the current indoor moisture content dinAnd the current dew point temperature Tl-CurrentAccording to the indoor set temperature TIs provided withAnd indoor set humidity RHIs provided withCalculating to obtain the moisture content d in the target chamberIs provided withAnd target dew point temperature Tl-target；
S3, judging the indoor temperature TinAnd indoor set temperature TIs provided withRelative size of (d) to determine the indoor moisture contentinAnd target indoor moisture content dIs provided withRelative magnitude of or current dew point temperature Tl-CurrentAnd target dew point temperature Tl-targetThe relative size of (d);
s4, when T isin＞TIs provided withAnd d isin＞dIs provided withOr Tin＞TIs provided withAnd Tl-Current>Tl-targetWhen the temperature is reduced, the mode of cooling and dehumidification is executed, and when T isin＞TIs provided withAnd d isin≤dIs provided withOr Tin＞TIs provided withAnd Tl-Current≤Tl-targetWhen the temperature is reduced, the mode of non-dehumidification is executed, and when T is usedin≤TIs provided withAnd d isin＞dIs provided withOr Tin≤TIs provided withAnd Tl-Current>Tl-targetWhen the temperature is not reduced, a dehumidification mode is executed, and when T is usedin≤TIs provided withAnd d isin≤dIs provided withOr Tin≤TIs provided withAnd Tl-Current≤Tl-targetWhen the temperature is not reduced, a mode of not dehumidifying is executed; or when T isin＞TIs provided with+ floating thresholds X and din＞dIs provided with+ Floating threshold Y or Tin＞TIs provided with+ floating threshold X and Tl-Current>Tl-target+ a floating threshold value Z, a cooling and dehumidifying mode is executed, and T isin＞TIs provided with+ floating thresholds X and din≤dIs provided withA floating threshold Y or Tin＞TIs provided with+ floating threshold X and Tl-Current≤Tl-target-a floating threshold value Z, a cooling and non-dehumidification mode is performed, when Tin≤TIs provided with-floating threshold X and din＞dIs provided with+ Floating threshold Y or Tin≤TIs provided with-floating threshold X and Tl-Current>Tl-target+ a floating threshold value Z, executing a mode of dehumidification without temperature reduction, and when T isin≤TIs provided with-floating threshold X and din≤dIs provided withA floating threshold Y or Tin≤TIs provided with-floating threshold X and Tl-Current≤Tl-targetFloating threshold Z, a mode is performed in which no cooling and no dehumidification takes place. In S4, the determination may be made not to increase the floating threshold X, Y, Z, or may be made to increase the floating threshold X, Y, Z.
The floating threshold value X and the floating threshold value Y can be set according to the specific implementation condition, wherein the value range of the floating threshold value X is 0-1, the value range of the floating threshold value Y is the moisture content corresponding to 0-5% of relative humidity, the value range of the floating threshold value Z is 0-1, and in this embodiment, 0 can be taken, that is, according to the first condition in S4, the floating threshold value is not increased.
The cooling and dehumidifying mode comprises the following steps:
a1, detecting the current air conditioner windshield, if the current air conditioner windshield is a free windshield, turning to the step A2, and if the current air conditioner windshield is a non-free windshield, turning to the step A3;
a2, setting the rotating speed of the indoor extension set of the air conditioner as the lowest rotating speed corresponding to the current operating condition;
a3, judgment Tl-Current≥Tl-targetWhether + α is true, if yes, go to step a4, if not, go to step a 6;
a4, judgment Te≤（aTl-Current+ bTl-target) If yes, the step goes to step A5, and if not, the step goes to step A8;
a5, judgment Te≤（aTl-Current+ bTl-target) If yes, the process goes to step A9, and if not, the process goes to step A9Step A10;
a6, judgment Te≤Tl-targetIf true, go to step A7 if true, otherwise go to step A8;
a7, judgment Te≤Tl-target-if β is true, if yes, go to step a9, otherwise go to step a 10;
a8, increasing the frequency of the compressor, and turning to the step S1;
a9, reducing the frequency of the compressor, and turning to the step S1;
a10, the current operation state is maintained, and the process goes to step S1.
In this embodiment, in the operating mode, a has a value range of 0 to 1, b has a value range of 0 to 1, and a + b =1 needs to be satisfied. The value of alpha is 2, the value of beta is 1, the value of gamma is 1, all of the three values are floating threshold values, and the floating threshold values can be set according to specific working conditions.
Specifically, in the cooling and dehumidifying mode, when the rotating speed of an indoor fan is a set wind gear, the frequency of a compressor is determined according to the difference between the current temperature and the target temperature, if the current dew point temperature is greater than or equal to the target dew point temperature plus 2 ℃, the compressor is adjusted according to the weighted average value of the current dew point temperature and the target dew point temperature of the indoor heat exchanger, and if the current dew point temperature is less than the target dew point temperature plus 2 ℃, the compressor is adjusted according to the target dew point temperature of the indoor heat exchanger; when the rotating speed of the indoor fan is in a free wind gear, the frequency of the compressor is controlled according to the difference between the current temperature and the target temperature, if the current dew point temperature is more than or equal to the target dew point temperature plus 2 ℃, the temperature of the indoor heat exchanger controlled by the rotating speed of the fan is equal to the weighted average value of the current dew point temperature and the target dew point temperature, if the current dew point temperature is less than the target dew point temperature plus 2 ℃, the temperature of the indoor heat exchanger controlled by the rotating speed of the fan is equal to the target dew point temperature, and when the rotating speed of the fan is at the maximum or minimum, the frequency of the compressor is adjusted to control the temperature of the indoor heat exchanger
The cooling and non-dehumidifying mode comprises the following steps:
b1, detecting the current air conditioner windshield, if the current air conditioner windshield is a free windshield, turning to the step B2, and if the current air conditioner windshield is a non-free windshield, turning to the step B3;
b2, setting the rotating speed of the indoor fan of the air conditioner as the highest rotating speed corresponding to the current operating condition;
b3, judgment Tl-Current≤Tl-target-a is true, if true, go to step B4, if false, go to step B6;
b4, judgment Te≥（aTl-Current+ bTl-target) If yes, go to step B5, otherwise go to step B8;
b5, judgment Te≥（aTl-Current+ bTl-target) If yes, the process goes to step B9, and if not, the process goes to step B10;
b6, judgment Te≥Tl-targetIf true, go to step B7 if true, otherwise go to step B8;
b7, judgment Te≥Tl-targetIf + β is true, go to step B9 if yes, go to step B10 if not;
b8, increasing the frequency of the compressor, and turning to the step S1;
b9, the compressor is switched to the frequency reduction mode, and the step S1 is turned to;
b10, the current operation state is maintained, and the process goes to step S1.
In this embodiment, in the operating mode, a has a value range of 0 to 1, b has a value range of 0 to 1, and a + b =1 needs to be satisfied. The value of alpha is 2, the value of beta is 1, the value of gamma is 1, all of the three values are floating threshold values, and the floating threshold values can be set according to specific working conditions.
Specifically, in the cooling and non-dehumidifying mode, when the rotating speed of an indoor fan is a set wind gear, the frequency of a compressor is determined according to the difference between the current temperature and the target temperature, if the current dew point temperature is less than or equal to the target dew point temperature of minus 2 ℃, the compressor is adjusted according to the weighted average value of the current dew point temperature and the target dew point temperature of the indoor heat exchanger, and if the current dew point temperature is greater than the target dew point temperature of minus 2 ℃, the compressor is adjusted according to the target dew point temperature of the indoor heat exchanger; when the rotating speed of the indoor fan is a free wind gear, the frequency of the compressor is controlled according to the difference value between the current temperature and the target temperature, if the current dew point temperature is less than or equal to the target dew point temperature minus 2 ℃, the temperature of the indoor heat exchanger controlled by the rotating speed of the fan is equal to the weighted average value of the current dew point temperature and the target dew point temperature, if the current dew point temperature is greater than the target dew point temperature minus 2 ℃, the temperature of the indoor heat exchanger controlled by the rotating speed of the fan is equal to the target dew point temperature, and when the rotating speed of the fan is at the maximum or the minimum, the frequency of the compressor is adjusted to control the temperature of the indoor heat exchanger.
The dehumidification cooling-free mode comprises the following steps:
c1, detecting the current air conditioner windshield, if the current air conditioner windshield is a free windshield, turning to the step C2, and if the current air conditioner windshield is a non-free windshield, turning to the step C3;
c2, setting the rotating speed of the indoor fan of the air conditioner as the lowest rotating speed corresponding to the current operating condition;
c3, judgment Tl-Current≥Tl-targetWhether + α is true, if yes, go to step C4, and if not, go to step C6;
c4, judgment Te≤（aTl-Current+ bTl-target) If yes, the step goes to step B5, and if not, the step goes to step C8;
c5, judgment Te≤（aTl-Current+ bTl-target) If yes, the process goes to step C9, and if not, the process goes to step C10;
c6, judgment Te≤Tl-targetIf true, go to step B7 if true, go to step C8 if not;
c7, judgment Te≤Tl-target-if β is true, if yes, go to step C9, if not go to step C10;
c8, raising the frequency of the compressor, and turning to the step C11;
c9, reducing the frequency of the compressor, and turning to the step C11;
c10, keeping the current running state, and turning to the step C11;
c11, according to indoor temperature TinAnd indoor set temperature TIs provided withJudging whether the relative size of the engine meets the shutdown condition, if so, stopping the engine, and if not, returning to the engineGo back to step S1.
Generally speaking, the conventional setting is that the indoor temperature is lower than the set temperature by more than 2 ℃, namely the machine is shut down, and the specific implementation can be specifically set according to the use requirement. In this embodiment, the value range of a in the operating mode is 0-1, the value range of b is 0-1, and a + b =1 needs to be satisfied. The value of alpha is 2, the value of beta is 1, the value of gamma is 1, all of the three values are floating threshold values, and the floating threshold values can be set according to specific working conditions.
Specifically, in the dehumidification non-cooling mode, when the rotating speed of an indoor fan is a set wind gear, if the current dew point temperature is greater than or equal to the target dew point temperature plus 2 ℃, the temperature of the compressor frequency control indoor heat exchanger is equal to the weighted average value of the current dew point temperature and the target dew point temperature, if the current dew point temperature is less than the target dew point temperature plus 2 ℃, the temperature of the compressor frequency control indoor heat exchanger is equal to the target dew point temperature, the compressor frequency control indoor heat exchanger is stopped when the difference between the current temperature and the target temperature meets the stop condition, and the compressor frequency control indoor heat exchanger is started and controlled according to the control when the difference between the current temperature and the target temperature meets the stop condition again. When the rotating speed of the indoor fan is a free wind gear, the rotating speed of the fan is the lowest wind gear, if the current dew point temperature is more than or equal to the target dew point temperature plus 2 ℃, the temperature of the heat exchanger in the compressor frequency control room is equal to the weighted average value of the current dew point temperature and the target dew point temperature, if the current dew point temperature is less than the target dew point temperature plus 2 ℃, the temperature of the heat exchanger in the compressor frequency control room is equal to the target dew point temperature, the compressor frequency control room is stopped when the difference value of the current temperature and the target temperature meets the stop condition, and the compressor frequency control room is started and controlled according to the control when the start condition is met again.
The mode of not cooling and not dehumidifying comprises the following steps:
d1, judgment of Te≥Tl-CurrentIf true, go to step D2;
d2, judgment of Te≥Tl-CurrentIf + δ is true, the process goes to step D3;
d3, reducing the frequency of the compressor, and turning to the step D6;
d4, raising the frequency of the compressor, and turning to the step D6;
d5, keeping the current running state, and turning to the step D6;
d6, according to the indoor temperature TinAnd indoor set temperature TIs provided withThe relative magnitude of (2) is determined whether or not the stop condition is satisfied, and if so, the stop is performed, and if not, the process returns to step S1.
Generally speaking, the conventional setting is that the indoor temperature is lower than the set temperature by more than 2 ℃, namely the machine is shut down, and the specific implementation can be specifically set according to the use requirement. In this embodiment, the value of δ is 1, and δ is a floating threshold, which can be set according to specific working conditions.
In the step D3, if the rotational speed of the fan of the air conditioner is adjustable, the rotational speed of the fan is synchronously reduced, and in the step D4, if the rotational speed of the fan of the air conditioner is adjustable, the rotational speed of the fan is synchronously increased.
Specifically, in the non-dehumidification and non-cooling mode, when the rotating speed of the indoor fan is a set wind gear, the temperature of the indoor heat exchanger is controlled by the frequency of the compressor to be higher than the current dew point temperature, the indoor heat exchanger is stopped when the difference between the current temperature and the target temperature meets the stop condition, and the indoor heat exchanger is started and controlled according to the control when the difference meets the start condition again. When the rotating speed of the indoor fan is a free wind gear, the fan is adjusted along with the frequency, the temperature of the indoor heat exchanger is controlled by the frequency of the compressor to be higher than the current dew point temperature, the indoor heat exchanger is stopped when the difference value between the current temperature and the target temperature meets the stop condition, and the indoor heat exchanger is started and controlled according to the control when the difference value meets the start condition again.
The invention also provides an air conditioner and a temperature and humidity control method applying the air conditioner.
The invention judges the operation mode of the air conditioner according to the relative size of the current indoor temperature and the indoor set temperature and the relative size of the current indoor moisture content and the target indoor moisture content, flexibly adapts to the requirements of different conditions, and simultaneously leads the temperature of the heat exchanger of the air conditioner to be equal to the dew point temperature corresponding to the indoor set temperature and the indoor set humidity or the weighted average value of the dew point temperature and the current dew point temperature by directly controlling the temperature of the heat exchanger of the air conditioner, thereby realizing rapid dehumidification and improving the comfort level of users in the cooling process. In addition, under the condition that a user sets a windshield, the invention can control both temperature and humidity by controlling the frequency of the compressor, thereby meeting the separate control requirements of temperature and humidity.
In the description of the present invention, it is to be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings and are only for convenience in describing the present invention and simplifying the description, but are not intended to indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, e.g., as meaning permanently attached, removably attached, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the scope of the included claims.

Claims (9)

1. A temperature and humidity control method of an air conditioner is characterized in that a current moisture content and a current dew point temperature are calculated according to a current indoor temperature and a current indoor relative humidity; calculating target indoor moisture content and target dew point temperature according to the indoor set temperature and the indoor set humidity, or calculating the target indoor moisture content and the target dew point temperature by acquiring default indoor temperature and/or indoor humidity; selecting a preset operation mode of the air conditioner according to the relative sizes of the current indoor temperature and the target temperature, the relative sizes of the current moisture content and the target moisture content or the relative sizes of the current dew point temperature and the target dew point temperature; or selecting a preset operation mode of the air conditioner according to the relative size of the difference value between the current indoor temperature and the target temperature and the floating threshold, the relative size of the difference value between the current moisture content and the target moisture content and the floating threshold, or the relative size of the difference value between the current dew point temperature and the target dew point temperature and the floating threshold; after a preset operation mode is selected, the rotating speed of an indoor fan and/or the frequency of a compressor are/is adjusted according to the relative size of the current dew point temperature and the target dew point temperature; the preset operation mode of the air conditioner comprises cooling and dehumidifying, cooling and non-dehumidifying, dehumidifying and non-cooling, and non-cooling and non-dehumidifying;
the cooling and dehumidifying mode comprises the following steps:
a1, detecting the current air conditioner gear, if the current air conditioner gear is a free gear, turning to step A2, and if the current air conditioner gear is a non-free gear, turning to step A3;
a2, setting the rotating speed of the indoor extension set of the air conditioner as the lowest rotating speed corresponding to the current operating condition;
a3, judgment
Figure FDA0003319668350000011
If true, the process goes to step A4, if false, the process goes to step A6;
a4, judgment
Figure FDA0003319668350000012
If true, the process goes to step A5, if false, the process goes to step A8;
a5, judgment
Figure FDA0003319668350000013
If true, the process goes to step A9, if false, the process goes to step A10;
a6, judgment
Figure FDA0003319668350000014
If true, go to step A7 if true, otherwise go to step A8;
a7, judgment
Figure FDA0003319668350000021
If true, go to step A9 if true, otherwise go to step A10;
a8, increasing the frequency of the compressor, and turning to the step S1;
a9, reducing the frequency of the compressor, and turning to the step S1;
a10, keeping the current running state, and turning to step S1;
Figure FDA0003319668350000022
is a target dew point temperature according to a set indoor temperature TIs provided withAnd indoor set humidity RHIs provided withCalculating to obtain;
Figure FDA0003319668350000023
is the current dew point temperature, which is based on the current indoor temperature TinAnd the current indoor relative humidity RHinCalculating to obtain;
Teis the indoor heat exchanger temperature;
alpha, beta and gamma are all floating threshold values.
2. The method for controlling the temperature and humidity of an air conditioner according to claim 1, wherein the adjusting of the indoor fan rotation speed according to the relative magnitude of the current dew point temperature and the target dew point temperature is: according to the difference value between the current dew point temperature and the target dew point temperature and the relative size of a preset threshold value, adjusting the rotating speed of the indoor fan according to the condition that the temperature of the indoor heat exchanger is equal to the target dew point temperature or equal to the weighted average value of the current dew point temperature and the target dew point temperature; adjusting the frequency of the compressor according to the relative magnitudes of the current dew point temperature and the target dew point temperature means that: and adjusting the frequency of the compressor according to the difference value between the current dew point temperature and the target dew point temperature and the relative size of a preset threshold value, wherein the temperature of the indoor heat exchanger is equal to the target dew point temperature or equal to the weighted average value of the current dew point temperature and the target dew point temperature.
3. The temperature and humidity control method of an air conditioner according to claim 2, comprising the steps of:
s1, detecting the current indoor temperature TinCurrent indoor relative humidity RHinIndoor set temperature TIs provided withIndoor set humidity RHIs provided withIndoor heat exchanger temperature Te；
S2, according to the current indoor temperature TinAnd the current indoor relative humidity RHinCalculating to obtain the current indoor moisture content dinAnd current dew point temperature
Figure FDA0003319668350000031
According to the indoor set temperature TIs provided withAnd indoor set humidity RHIs provided withCalculating to obtain the moisture content d in the target chamberIs provided withAnd target dew point temperature
Figure FDA0003319668350000032
S3, judging the indoor temperature TinAnd indoor set temperature TIs provided withRelative size of (d) to determine the indoor moisture contentinAnd target indoor moisture content dIs provided withRelative magnitude of or current dew point temperature
Figure FDA0003319668350000033
And target dew point temperature
Figure FDA0003319668350000034
The relative size of (d);
s4, when T isin＞TIs provided withAnd d isin＞dIs provided withOr Tin＞TIs provided withAnd is
Figure FDA0003319668350000035
When the temperature is reduced, the mode of cooling and dehumidification is executed, and when T isin＞TIs provided withAnd d isin≤dIs provided withOr Tin＞TIs provided withAnd is
Figure FDA0003319668350000036
When the temperature is reduced, the mode of non-dehumidification is executed, and when T is usedin≤T Is provided withAnd d isin＞dIs provided withOr Tin≤TIs provided withAnd is
Figure FDA0003319668350000037
When the temperature is not reduced, a dehumidification mode is executed, and when T is usedin≤TIs provided withAnd d isin≤d Is provided withOr Tin≤TIs provided withAnd is
Figure FDA0003319668350000038
When the temperature is not reduced, a mode of not dehumidifying is executed; or when T isin＞TIs provided with+ floating thresholds X and din＞dIs provided with+ Floating threshold Y or Tin＞TIs provided with+ a floating threshold value X and
Figure FDA0003319668350000039
executing a cooling and dehumidifying mode when Tin＞TIs provided with+ floating thresholds X and din≤dIs provided withA floating threshold Y or Tin＞TIs provided with+ a floating threshold value X and
Figure FDA00033196683500000310
executing a cooling and non-dehumidifying mode when Tin≤TIs provided with-floating threshold X and din＞dIs provided with+ Floating threshold Y or Tin≤TIs provided withA floating threshold value X and
Figure FDA00033196683500000311
Figure FDA00033196683500000312
executing a mode of dehumidification without temperature reduction when Tin≤TIs provided with-floating threshold X and din≤dIs provided withA floating threshold Y or Tin≤TIs provided withA floating threshold value X and
Figure FDA00033196683500000313
and executing a mode of not cooling and not dehumidifying.
4. The temperature and humidity control method of an air conditioner according to claim 2, wherein the cooling non-dehumidification mode includes the steps of:
b1, detecting the current air conditioner gear, if the current air conditioner gear is a free gear, turning to the step B2, and if the current air conditioner gear is a non-free gear, turning to the step B3;
b2, setting the rotating speed of the indoor fan of the air conditioner as the highest rotating speed corresponding to the current operating condition;
b3, judgment
Figure FDA00033196683500000314
If true, the process goes to step B4, if false, the process goes to step B6;
b4, judgment
Figure FDA0003319668350000041
If true, the process goes to step B5, if false, the process goes to step B8;
b5, judgment
Figure FDA0003319668350000042
If true, the process goes to step B9, if false, the process goes to step B10;
b6, judgment
Figure FDA0003319668350000043
If true, go to step B7 if true, otherwise go to step B8;
b7, judgment
Figure FDA0003319668350000044
If true, go to step B9 if true, otherwise go to step B10;
b8, increasing the frequency of the compressor, and turning to the step S1;
b9, the compressor is switched to the frequency reduction mode, and the step S1 is turned to;
b10, the current operation state is maintained, and the process goes to step S1.
5. The temperature and humidity control method of an air conditioner according to claim 2, wherein the dehumidification non-cooling mode includes the steps of:
c1, detecting the current air conditioner gear, if the current air conditioner gear is a free gear, turning to the step C2, and if the current air conditioner gear is a non-free gear, turning to the step C3;
c2, setting the rotating speed of the indoor fan of the air conditioner as the lowest rotating speed corresponding to the current operating condition;
c3, judgment
Figure FDA0003319668350000045
If true, the process goes to step C4, if false, the process goes to step C6;
c4, judgment
Figure FDA0003319668350000046
If true, the process goes to step B5, if true, the process goes to step C8;
c5, judgment
Figure FDA0003319668350000047
If true, the process goes to step C9, if false, the process goes to step C10;
c6, judgment
Figure FDA0003319668350000048
If true, go to step B7 if true, go to step C8 if not;
c7, judgment
Figure FDA0003319668350000051
If true, go to step C9 if true, otherwise go to step C10;
c8, raising the frequency of the compressor, and turning to the step C11;
c9, reducing the frequency of the compressor, and turning to the step C11;
c10, keeping the current running state, and turning to the step C11;
c11, according to indoor temperature TinAnd indoor set temperature TIs provided withThe relative magnitude of (2) is determined whether or not the stop condition is satisfied, and if so, the stop is performed, and if not, the process returns to step S1.
6. The temperature and humidity control method of an air conditioner according to claim 2, wherein the no-cool no-dehumidification mode comprises the steps of:
d1, judgment
Figure FDA0003319668350000052
If true, go to step D2;
d2, judgment
Figure FDA0003319668350000053
If true, go to step D3;
d3, reducing the frequency of the compressor, and turning to the step D6;
d4, raising the frequency of the compressor, and turning to the step D6;
d5, keeping the current running state, and turning to the step D6;
d6, according to the indoor temperature TinAnd indoor set temperature TIs provided withThe relative magnitude of (2) is determined whether or not the stop condition is satisfied, and if so, the stop is performed, and if not, the process returns to step S1.
7. The method as claimed in claim 6, wherein in the step D3, if the speed of the indoor fan is adjustable, the speed of the fan is synchronously decreased, and in the step D4, if the speed of the indoor fan is adjustable, the speed of the fan is synchronously increased.
8. The temperature and humidity control method of an air conditioner according to claim 1, wherein the default target temperature is preset to 24-28 ℃; the default target relative humidity is preset to be 40-70%.
9. An air conditioner characterized by applying the temperature and humidity control method of the air conditioner as set forth in any one of claims 1 to 8.
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