CN114484805A - Air conditioner temperature and humidity control method and air conditioner - Google Patents

Air conditioner temperature and humidity control method and air conditioner Download PDF

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Publication number
CN114484805A
CN114484805A CN202210176959.5A CN202210176959A CN114484805A CN 114484805 A CN114484805 A CN 114484805A CN 202210176959 A CN202210176959 A CN 202210176959A CN 114484805 A CN114484805 A CN 114484805A
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humidity
temperature
air conditioner
time
unit
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CN114484805B (en
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江世恒
李丽霞
谢沅
刘珊珊
宋美琪
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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

Abstract

The invention belongs to the field of air conditioners, and particularly relates to an air conditioner temperature and humidity control method and an air conditioner, wherein the control method comprises the following steps: acquiring real-time temperature and real-time humidity of an indoor environment, and user set temperature and user set humidity in a refrigeration mode; calculating a temperature difference delta T according to the real-time temperature and the user set temperature, and judging whether the temperature difference delta T is in a set temperature difference range or not; when the temperature difference delta T is within a set temperature difference range, controlling the air conditioner to enter a temperature and humidity linkage control mode; in the temperature and humidity linkage control mode, the temperature difference delta T and the unit temperature change time T are usedTTo determine whether to enter a humidity conditionerControlling; when the air conditioner enters humidity regulation, the humidity difference delta R is calculated according to the real-time humidity and the humidity set by the user, and the unit humidity change time t is calculated according to the humidity difference delta RRAnd inner tube temperature TPipeTo determine a control strategy of the air conditioner. The control method provided by the invention can be used for accurately controlling the temperature and the humidity, so that the temperature and the humidity fluctuate within a set range in a small range, and the environmental comfort is improved.

Description

Air conditioner temperature and humidity control method and air conditioner
Technical Field
The invention belongs to the field of air conditioners, and particularly relates to an air conditioner temperature and humidity control method and an air conditioner.
Background
With the continuous improvement of living standard, the requirement of people on the comfort of the household air conditioner is higher and higher, and the comfort is mainly the reasonable combination of temperature, humidity and wind speed. The traditional dehumidification function is mainly that when refrigerating, the surface temperature of the indoor heat exchanger is lower than the environmental dew point temperature, and water vapor in the air is condensed when meeting cold on the surface of the heat exchanger, so that the moisture in the air is continuously separated out, and the purpose of dehumidification is achieved. The common household air conditioner is not provided with any heating device, the humidity range is difficult to adjust in the refrigeration process, and the control parameters need to be corrected through logic judgment of heat and humidity loads. Moreover, due to the variable environment, relevant choices are needed when the control is carried out, and the temperature reaching the target is taken as a primary target.
The present invention has been made in view of this situation.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a control method and an air conditioner which can simultaneously and accurately control the temperature and the humidity in a refrigeration mode.
In order to solve the technical problem, the invention provides an air conditioner temperature and humidity control method, wherein the air conditioner is provided with a temperature and humidity linkage control mode, and the control method comprises the following steps:
acquiring real-time temperature and real-time humidity of an indoor environment, and user set temperature and user set humidity in a refrigeration mode;
calculating a temperature difference delta T according to the real-time temperature and the user set temperature, and judging whether the temperature difference delta T is in a set temperature difference range or not;
when the temperature difference delta T is within a set temperature difference range, controlling the air conditioner to enter a temperature and humidity linkage control mode; in the temperature and humidity linkage control mode, the temperature and humidity linkage control mode is controlled according to the temperature difference delta T and the unit temperature change time TTTo determine whether to enter humidity regulation and control and the unit temperature change time tTTemperature difference in unit time/unit time; when the air conditioner enters humidity regulation, the humidity difference delta R is calculated according to the real-time humidity and the humidity set by the user, and the unit humidity change time t is calculated according to the humidity difference delta RRAnd inner tube temperature TPipeTo determine the control strategy of the air conditioner, unit humidity change time tRHumidity difference per unit time.
Further optionally, in the temperature and humidity linkage control mode, the temperature and humidity linkage control mode is performed according to the temperature difference Δ T and the unit temperature change time TTTo determine whether to enter humidity regulation, including
Judging whether the temperature difference delta T meets the following conditions: Δ T > 0; if Δ T >0, the time T varies per unit temperatureTTo determine whether to enter humidity regulation; and if the delta T is less than or equal to 0, determining whether to enter humidity regulation or not according to the temperature difference delta T.
Further optionally, the time t varies according to the unit temperatureTTo determine whether to enter humidity regulation, including
Acquiring real-time temperature, and calculating unit temperature change time t according to the acquired real-time temperatureT；
Determining a net thermal load value ST corresponding to the current unit temperature change time tT according to a preset mapping relation table of the unit temperature change time and the net thermal load value;
and determining whether to enter humidity regulation or not according to the net heat load value ST.
Further optionally, the determining whether to enter humidity regulation according to the net thermal load value ST includes controlling the air conditioner to directly enter humidity regulation when the net thermal load value ST is 0;
when the net heat load value ST is less than 0, the inner fan is adjusted to a low windshield to operate, and then the air conditioner is controlled to enter humidity regulation and control;
and when the net heat load value ST is greater than 0, controlling the air conditioner to keep refrigerating operation and returning to the initial state of the temperature and humidity linkage control mode.
Further optionally, the determining whether to enter humidity regulation according to the temperature difference Δ T comprises
When the temperature difference delta T is judged to be less than or equal to 0, controlling the operation of the low windshield of the inner fan;
judging whether the temperature difference delta T meets the following conditions: if the delta T is less than the set temperature difference, controlling the compressor to stop and returning to the initial state of the temperature and humidity linkage control mode again; if delta T is more than or equal to 0 and is more than or equal to the set temperature difference, the air conditioner is controlled to enter humidity regulation.
Further optionally, the humidity difference Δ R is calculated according to the real-time humidity and the humidity set by the user, and the unit humidity change time t is calculated according to the humidity difference Δ RTAnd inner tube temperature TPipeTo determine a control strategy for an air conditioner, comprising
Acquiring real-time humidity, and calculating unit humidity change time t according to the acquired real-time humidityR；
Determining the current unit humidity change time t according to a preset mapping relation table of the unit humidity change time and the net moisture load valueRThe corresponding wet load value SR;
according to the humidity difference delta R, the humidity load value SR and the inner pipe temperature TPipeTo determine whether to enter humidity regulation.
Further optionally, the humidity difference Δ R, the humidity load value SR and the inner tube temperature T are used as the basisPipeTo determine whether to enter humidity regulation, including
When the humidity difference Δ R >0, when SR is 0, the inner tube temperature T is measuredPipe< dew point temperature TDew pointKeeping the running state of the system; if the inner pipe is at temperature TPipeNot less than dew point temperature TDew pointReducing the opening of the expansion valve;
when SR is greater than 0, raise the compressor running frequency;
when SR <0, keep the system running state.
Further optionally, the humidity difference Δ R, the humidity load value SR and the inner tube temperature T are usedPipeTo determine whether to enter humidity regulation, further comprising
When the humidity difference Δ R is less than or equal to 0, when SR is 0, the inner tube temperature T is measuredPipe< dew point temperature TDew pointIncreasing the opening of the expansion valve; if the inner pipe is at temperature TPipeNot less than dew point temperature TDew pointKeeping the running state of the system;
when SR is greater than 0, keeping the system running state;
and when the SR is less than 0, reducing the running frequency of the compressor.
The invention also proposes a control device comprising one or more processors and a non-transitory computer-readable storage medium storing program instructions for implementing the method according to any one of the above when the program instructions are executed by the one or more processors.
The invention also provides an air conditioner which adopts the method of any one of the above or comprises the control device.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
the control method can accurately control the temperature and the humidity, so that the temperature and the humidity fluctuate within a set range in a small range, and the comfort of the environment is improved.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1: is a control logic diagram of an embodiment of the present invention.
FIG. 2: the embodiment of the invention provides a logic diagram for judging whether to enter a temperature and humidity linkage control mode.
FIG. 3: the control logic diagram is the control logic diagram after the temperature and humidity linkage control mode is entered.
FIG. 4: the air conditioner provided by the embodiment of the invention regulates and controls the indoor temperature to a temperature and humidity curve graph with the user set temperature of 24 ℃ and the relative humidity of 45% in the environment with the indoor temperature of 30 ℃ and the relative humidity of 80%.
FIG. 5 is a schematic view of: the air conditioner provided by the embodiment of the invention regulates and controls the indoor temperature to a temperature and humidity curve diagram of 24 ℃ of the user set temperature and 55% of the relative humidity in the environment with the indoor temperature of 30 ℃ and the relative humidity of 80%.
FIG. 6: the air conditioner provided by the embodiment of the invention regulates and controls the indoor temperature to a temperature and humidity curve graph with the user set temperature of 24 ℃ and the relative humidity of 65% in the environment with the indoor temperature of 30 ℃ and the relative humidity of 80%.
FIG. 7: the air conditioner provided by the embodiment of the invention regulates and controls the indoor temperature to a temperature and humidity curve graph with the user set temperature of 24 ℃ and the relative humidity of 75% in the environment with the indoor temperature of 30 ℃ and the relative humidity of 80%.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
To the problem that current air conditioner can't carry out accurate control to temperature and humidity simultaneously when refrigerating, this embodiment has proposed an air conditioner temperature and humidity control method, and the air conditioner of this embodiment is equipped with temperature and humidity coordinated control mode, and control method includes step S1 ~ S3, wherein:
s1, acquiring real-time temperature and real-time humidity of the indoor environment, and user set temperature and user set humidity in a refrigeration mode;
s2, calculating a temperature difference delta T according to the real-time temperature and the user set temperature, and judging whether the temperature difference delta T is in a set temperature difference range;
s3, when the temperature difference delta T is within the set temperature difference range, controlling the air conditioner to enter a temperature and humidity linkage control mode; in the temperature and humidity linkage control mode, the temperature and humidity linkage control mode is controlled according to the temperature difference delta T and the unit temperature change time TTTo determine whether to enter humidity regulation; when the air conditioner enters humidity regulation, the humidity difference delta R is calculated according to the real-time humidity and the humidity set by the user, and the unit humidity change time t is calculated according to the humidity difference delta RRAnd inner tube temperature TPipeTo determine a control strategy of the air conditioner.
The embodiment is applied to the refrigeration mode of the variable frequency air conditioner, so that the temperature of a room can be reduced to the temperature set by a user during refrigeration, and meanwhile, the humidity value in the room can be synchronously controlled by adjusting the latent heat sensible heat ratio. In this embodiment, when the temperature difference between the real-time temperature and the user-set temperature is within the set temperature difference range, it is described that the set condition for entering the temperature and humidity linkage control mode is reached. After entering a temperature and humidity linkage control mode, according to the temperature difference delta T and the unit temperature change time TTTo determine whether to perform dehumidification, per unit temperature change time tTReflects the change rate of the environmental temperature according to the unit temperature change time tTThe relationship between the net heat load value and the system refrigerating capacity can be judged, so that the proper time for dehumidification is determined. After dehumidification, the humidity is changed according to the humidity difference delta R and the unit humidity change time tRTo determine a control strategy. Time t per unit humidity changeRReflects the change rate of the environmental humidity according to the change time t of the unit humidityRDetermining the relation between the environment humidity and the latent heat sensible heat ratio of the system, determining the control strategy of the air conditioner according to the relation between the latent heat sensible heat ratio of the system, and determining the control strategy of the air conditioner according to the determined control strategyThe operation is realized, so that the temperature and the humidity are accurately controlled, the fluctuation of the temperature and the humidity within a set range is small, and the comfort of the environment is improved. In a specific embodiment, as shown in the control logic diagram of fig. 2, after the air conditioner is turned on, if a user sets a relative humidity value, a Δ T value is calculated in real time according to a normal variable-frequency refrigeration logic operation system, and when an ambient temperature approaches a temperature set by the user, a temperature and humidity linkage control mode is entered. Entry conditions were chosen here to be-2<ΔT<2. And if the user does not set the relative humidity, the system always operates according to the normal refrigeration mode.
In some specific embodiments, after the air conditioner enters the cooling mode, if the user sets the temperature and the humidity, after receiving a control instruction of the temperature and humidity linkage control mode sent by the user, when the temperature difference Δ T is determined to be within the temperature range set by the user, the air conditioner enters the temperature and humidity linkage control mode, and if the control instruction of the user is not received, the air conditioner always operates in the cooling mode.
In other specific embodiments, after the air conditioner enters the cooling mode, if the temperature and humidity are set by the user, the air conditioner directly enters the temperature and humidity linkage control mode after the temperature difference Δ T is within the temperature range set by the user.
When the temperature difference between the real-time temperature and the temperature set by the user is not within the set temperature difference range, the set condition for entering the temperature and humidity linkage control mode is not met, and the operation is continued according to the refrigeration mode.
After the air conditioner of the embodiment enters the temperature and humidity linkage mode, the mode process is executed circularly, and the circulation interval is not limited (the circulation judgment is once at an interval of 10min is suggested here). And (3) acquiring and calculating parameters of each judgment condition in real time, such as delta T and delta R, and only taking the value in the current cycle for logic judgment each time the cycle is performed. In a primary process:
further optionally, step S3 includes S31, wherein:
s31, judging whether the temperature difference delta T meets the following conditions: Δ T > 0; if Δ T >0, according to the unit temperature change time TTTo determine whether to enter humidity regulation; and if the delta T is less than or equal to 0, determining whether to enter humidity regulation or not according to the temperature difference delta T.
Further optionally, if Δ T >0, step S31 includes S311 to S313, where:
s311, acquiring real-time temperature, and calculating unit temperature change time t according to the acquired real-time temperatureTTime per unit temperature change tTTemperature difference in unit time/unit time;
s312, determining a net thermal load value ST corresponding to the current unit temperature change time tT according to a preset unit temperature change time-net thermal load value mapping relation table;
s313, determining whether to enter humidity control according to the net thermal load value ST, specifically, when the net thermal load value ST is 0, controlling the air conditioner to directly enter humidity control; when the net heat load value ST is less than 0, the inner fan is adjusted to a low windshield to operate, and then the air conditioner is controlled to enter humidity regulation and control; and when the net heat load value ST is greater than 0, controlling the air conditioner to keep refrigerating operation and returning to the initial state of the temperature and humidity linkage control mode.
In this embodiment, when Δ T>And 0, judging the value of the net heat load value ST, and logically judging the relation between the environment temperature and the system refrigerating capacity by introducing the concept of the net heat load value ST, wherein the relation is a function of the change rate of the environment temperature. Here, the unit temperature change time t is introducedT，tTThe temperature difference per unit time, in one embodiment, is set to 1min,
Figure BDA0003520653860000081
delta Tmin is the change value of the environmental temperature within 1min, Delta Tmin＝TAt any point in time-TBefore 1minAt deg.C. In other embodiments, the unit time may be 30s, 2min, or the like, and may be set according to needs. In some embodiments, the preset mapping relationship table of unit temperature change time-net heat load value includes the following correspondence relationship between unit temperature change time and net heat load value:
Figure BDA0003520653860000082
the physical meaning of the characterization of the net thermal load value ST here is explained as follows: when in useAt relatively slow temperature changes, i.e. tTIs greater, here, t is takenTThe absolute value is more than 10min, which means that the room temperature change rate is slow at the moment, and further represents that the refrigerating capacity (latent heat value + sensible heat value) of the air conditioner is equivalent to the heat load of the room, wherein the sign only represents the temperature change direction and does not represent the value. If the refrigerating capacity of the air conditioner is larger or smaller than the heat load of the room, the change time of the unit temperature is smaller, tTShould be small, where t is takenTThe absolute value is less than 10. To facilitate logical judgment, when the temperature rises rapidly (0)<tT<10) ST ═ 1; while the temperature remains constant (10)<tTOr tT<-10), ST ═ 0; when the temperature drops rapidly (0)>tT>-10)，ST＝-1。
Of course, the correspondence between the change time per unit temperature and the net thermal load value ST is not limited to the above-listed correspondence, but it should be noted that when ST is 0, humidity control is performed; although the temperature is higher than the temperature set by the user, within the set temperature difference range, ST is 0, which indicates that the temperature changes slowly, the refrigerating capacity of the system and the heat load are relatively close, and the ambient humidity can be adjusted by changing the latent heat ratio. When ST is more than 0, controlling the air conditioner to operate in a normal refrigeration mode and returning to a mode judgment initial stage; at the moment, the temperature is higher than the temperature set by a user, ST is greater than 0, the ambient temperature is rapidly increased, the refrigerating capacity of the air conditioning system is far less than the heat load, the overall logic takes the control temperature as the primary condition, and then the temperature control is carried out according to the normal refrigerating mode. When ST is less than 0, adjusting the rotating speed of an inner machine fan to a low wind gear and entering humidity regulation and control; at the moment, the temperature is rapidly reduced, the refrigerating capacity is far greater than the heat load, the rotating speed of the internal machine is adjusted to a low wind level, the refrigerating capacity is reduced, the latent heat ratio is improved, and the environment humidity is finely adjusted and controlled through the system.
Further optionally, if Δ T ≦ 0, step S31 includes S311 'to S312', wherein:
s311', when the temperature difference delta T is judged to be less than or equal to 0, controlling the inner fan to operate in a low windshield mode;
s312', judging whether the temperature difference delta T meets the following conditions: if the delta T is less than the set temperature difference, controlling the compressor to stop and returning to the initial state of the temperature and humidity linkage control mode again; if delta T is more than or equal to 0 and is more than or equal to the set temperature difference, the air conditioner is controlled to enter humidity regulation.
In this embodiment, if Δ T is less than or equal to 0, that is, the ambient temperature is less than the temperature set by the user, the rotation speed of the fan of the internal machine is set to be a low wind gear, and whether dehumidification is to be performed is determined. If delta T < -2, stopping the compressor and returning to the mode initial stage; when the temperature difference is less than the set temperature difference, for example, less than-2 ℃, the refrigerating capacity is far greater than the heat load, so that the compressor stops running and the indoor unit keeps supplying air for quick heating without causing the trouble of users, thereby having the minimum influence on the sense of the users. When the temperature difference is more than or equal to 0 and more than or equal to delta T and more than or equal to the set temperature difference, for example, the temperature difference is more than or equal to 0 and more than or equal to minus 2 ℃, the refrigerating capacity is slightly larger than the heat load, the cooling rate can be slowed down under the condition of low wind speed, the comfort of a user can be ensured, and the humidity regulation is carried out at the moment. In this embodiment, after the humidity is adjusted, the wind speed is set to a low wind speed. Low wind speeds increase the latent heat ratio, which can also be considered as increasing the absolute moisture removal. Under the same pipe temperature condition, the pipe temperature is lower than the dew point temperature, the smaller the wind speed is, the larger the latent heat quantity is, namely, the moisture in the air is easier to condense into liquid state, thereby reducing the humidity. Therefore, the latent heat ratio of the refrigerating system can be changed by adjusting the wind speed, and the aim of controlling the humidity can be achieved. However, the wind speed is a parameter that the user feels intuitively, and the changing wind speed causes discomfort and troubles to the user. Moreover, if the control parameters are too much, the instability of the system is increased, and the difficulty of parameter adjustment is increased, so that the stability of the wind speed in the humidity adjusting process is kept.
Further optionally, the step S3 further includes S32 to S34, where:
s32, calculating unit humidity change time t according to the acquired real-time humidityRTime per unit change in humidity tRHumidity difference per unit time/unit time;
s33, determining the current unit humidity change time t according to the preset mapping relation table of unit humidity change time and net moisture load valueRThe corresponding wet load value SR;
s34, according to the humidity difference Delta R, the humidity load value SR,Inner tube temperature TPipeTo determine whether to enter humidity regulation. Specifically, when the humidity difference Δ R >0, the internal tube temperature T is set to 0Pipe< dew point temperature TDew pointKeeping the running state of the system; if the inner pipe is at temperature TPipeNot less than dew point temperature TDew pointReducing the opening of the expansion valve; when SR is greater than 0, raise the compressor running frequency; when SR <0, keep the system running state. When the humidity difference Δ R is less than or equal to 0, when SR is 0, the inner tube temperature T is measuredPipe< dew point temperature TDew pointIncreasing the opening of the expansion valve; if the inner pipe is at temperature TPipeNot less than dew point temperature TDew pointKeeping the running state of the system; when SR is greater than 0, keeping the system running state; and when the SR is less than 0, reducing the running frequency of the compressor.
The present embodiment introduces the concept of a net moisture load value for logically determining the relationship between ambient humidity and the latent heat sensible heat ratio of the system, which is a function of the rate of change of ambient humidity. Here, the unit humidity change time, t, is introducedRThe difference in humidity per unit of time, in some embodiments,
Figure BDA0003520653860000101
wherein: Δ RminIs the change value of the environmental humidity within 1min, delta Rmin＝RAt any time point-RBefore 1min% of the amount of the compound (b). In other embodiments, the unit time may be 30s, 2min, or the like, and may be set according to needs. In one embodiment, the preset mapping relationship between the unit humidity change time and the net humidity load value SR in the unit humidity change time-net humidity load value SR table has the following correspondence relationship:
Figure BDA0003520653860000111
the physical meaning of the characterization of the net moisture load value SR here is explained as follows: when the humidity changes more slowly, i.e. tRIs greater, here, t is takenRAn absolute value greater than 10min means that the room humidity changes at a slower rate, which represents the latent heat of the air conditioner and the humidity load of the roomRather, the signs here merely indicate the direction of the humidity change and do not represent the magnitude of the values. If the latent heat of the air conditioner is larger or smaller than the heat load of the room, the change time of the unit humidity is smaller, tRShould be small, where t is takenRThe absolute value is less than 10. To facilitate logical judgment, the temperature rises rapidly (0)<tR<10) SR 1; while the temperature remains constant (10)<tROr tR<-10), SR ═ 0; when the temperature drops rapidly (0)>tR>-10)，SR＝-1。
Of course, the correspondence between the change time of the unit humidity and the net moisture load SR is not limited to the correspondence listed above, but it should be noted that after the humidity control is performed, the value of Δ R is determined, and if Δ R is less than 0, the value of net moisture load SR is further determined.
If SR <0, reduce the compressor running frequency, for example reduce 2Hz, then return to the initial stage of the temperature and humidity linkage control mode; the humidity is less than the humidity set by the user, the environment humidity is reduced rapidly, the latent heat is large, the pipe temperature is low, the system flow can be reduced by reducing the frequency of the 2Hz compressor, the superheat degree of the refrigerant in the evaporator can be increased after the refrigerant amount is reduced, and the average pipe temperature can be increased. In the normal expansion valve control logic, the expansion valve is linked with the compressor frequency, so that when the compressor frequency is reduced, the opening degree of the expansion valve is increased, the evaporation temperature is increased, and the pipe temperature is also reduced. From these two dimensions, reducing the compressor frequency reduces the latent heat ratio and reduces the amount of dehumidification.
If SR is equal to 0, further judge TPipeIf T isPipe<TDew pointThen, the opening degree of the expansion valve is increased, for example, increased by 5B, and the mode returns to the initial stage; if SR is 0, and TPipe≥TDew pointIf so, keeping the system state and returning to the mode initial stage; in this mode fine adjustment state, the expansion valve opening degree and the compressor frequency are controlled in an interlocking manner, but the expansion valve is controlled alone at this time, and the compressor frequency is not changed. By changing the opening degree of the expansion valve, the pressure drop can be changed, i.e. the evaporation pressure is changed, thereby changing the tube temperature. When the ambient humidity is less than the user-set humidity, SR ═ 0 means latent heatThe quantity is equivalent to the humidity load, if the tube temperature is lower than the dew point temperature, the moisture is continuously condensed and separated out, and the humidity is continuously reduced, the tube temperature is increased, and the latent heat ratio is reduced. And if the pipe temperature is not less than the dew point temperature, keeping the system running state until next judgment. Since the system is in balance, fine adjustment of system parameters will change the balance condition, the ambient humidity will be in a slow rising or falling process, and if the system is in different stages at the next judgment, another control statement is executed.
If SR is greater than 0, then keeping system state, returning to mode initial stage; here, although SR >0 means that the humidity is rising rapidly, the logic we enter into humidity regulation is that the temperature difference Δ T is within a set temperature difference range, e.g. within ± 2 ℃, meaning that here the cooling capacity does not differ much from the heat load.
Preferably, in the unit humidity change time-net moisture load correspondence table, the judgment logic time node is consistent with the time node of the whole logic cycle of the temperature and humidity linkage control, optionally, the judgment logic time node of the net moisture load is 10min and is consistent with the time node of the logic cycle, that is, 10min is a cycle, and the condition of rapid rise is that the rise is 1% within 10min, that is, the environmental humidity does not exceed 10% although the environmental humidity rises when the next logic cycle is performed. If the environmental humidity is higher than the humidity set by the user during the next logic circulation judgment, executing other statements, if the environmental humidity is still lower than the humidity set by the user, and the humidity change rate is not constant and is slower and slower, then controlling the system parameters through the SR value at the time.
If Δ R >0, the net moisture load SR value is further determined. If SR >0, increase the compressor running frequency. For example, 2Hz, returning to the initial stage of the mode; here, SR >0 means that when the ambient humidity is higher than the humidity set by the user and the ambient humidity rises rapidly, the frequency of the 2Hz compressor is increased, and at this time, the tube temperature will be decreased, the latent heat will be increased, and the capacity of the system to condense water will be improved.
If SR equals 0, further determining T pipe, if T pipe > T dew point, decreasing expansion valve opening by 5B, for example, and returning to the mode start stage; if SR is 0 and T pipe is less than T dew point, keeping system state and returning to mode initial stage; here, the mode fine adjustment state means that the change in the ambient humidity is slow, and when the tube temperature is lower than the dew point temperature, moisture is continuously condensed and precipitated, and the system state is maintained in order to maintain the stability of the system. If the temperature of the pipe is higher than the dew point temperature, the latent heat is zero at present, and the opening degree of the expansion valve is slightly reduced, so that the evaporator continuously condenses water.
If SR is less than 0, then keeping system state, returning to mode initial stage; and when the humidity is reduced, the system state is kept, and logic judgment is carried out according to the environmental parameters in the next circulation.
Dew point temperature T of the present embodimentDew pointThe air temperature control device can be calculated from the relative humidity and the temperature of air, in the case, the environment temperature and the humidity are known conditions, and the default dew point temperature is the known condition;
in this embodiment, the maximum and minimum frequencies of the compressor and the maximum and minimum opening degrees of the expansion valve are different according to different monomers, and are not restricted in this embodiment, and are set according to different product models in the process of using this embodiment
The process exit conditions in this embodiment are shutdown and cancellation of humidity control parameters and any other conditions that cause shutdown in any system reliability determination logic, including but not limited to fluorine-deficient protection, over-temperature protection, high-voltage protection, and the like. The content of the invention not being described in the present application is not described in the present application.
The unit temperature or humidity change time is used as a representation and can correspond to the cycle time conveniently, and when the temperature and humidity change rate is judged, the logic readability can be improved and the parameters can be adjusted conveniently by using the uniform time. In addition, by introducing the net heat load and the net humidity load value, the logic complexity can be reduced, and the system reliability is improved.
In this embodiment, temperature and humidity control is performed according to the above control method for an environment in which the indoor temperature and the relative humidity are 30 ℃ and 80%, respectively, and when the temperature and the humidity set by the user are 24 ℃ and 45% -75%, respectively, and a certain heat and humidity load is applied in the temperature and humidity control process. After the operation for a period of time, the temperature and the humidity can be stabilized in a smaller range near the user-set temperature and the user-set humidity, and specific operation curves are shown in fig. 4 to 7. As can be seen from fig. 4 to 7, after the temperature and humidity linkage control mode of the present embodiment is adopted, both the indoor temperature value and the indoor relative humidity can fluctuate within a small range within the temperature range and the humidity range set by the user.
The present embodiments also propose a control device comprising one or more processors and a non-transitory computer-readable storage medium storing program instructions for implementing the method according to any one of the above when the program instructions are executed by the one or more processors.
The embodiment also provides an air conditioner which adopts the method of any one of the above items or comprises the control device.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. The air conditioner temperature and humidity control method is characterized in that the air conditioner is provided with a temperature and humidity linkage control mode, and the control method comprises the following steps:
acquiring real-time temperature and real-time humidity of an indoor environment, and user set temperature and user set humidity in a refrigeration mode;
calculating a temperature difference delta T according to the real-time temperature and the user set temperature, and judging whether the temperature difference delta T is in a set temperature difference range or not;
when the temperature difference delta T is within a set temperature difference range, controlling the air conditioner to enter a temperature and humidity linkage control mode;
in the temperature and humidity linkage control mode, the temperature and humidity linkage control mode is controlled according to the temperature difference delta T and the unit temperature change time TTTo determine whether to enter humidity regulation and control and the unit temperature change time tTTemperature difference in unit time/unit time;
when the air conditioner enters humidity regulation and control, the humidity difference delta R is calculated according to the real-time humidity and the humidity set by a user, and the humidity difference delta R and the unit humidity change time t are used for regulating the humidityRAnd inner tube temperature TPipeTo determine the control strategy of the air conditioner, unit humidity change time tRHumidity difference per unit time.
2. The temperature and humidity control method of claim 1, wherein in the temperature and humidity linkage control mode, the temperature and humidity control method is performed according to the temperature difference Δ T and the unit temperature change time TTTo determine whether to enter humidity regulation, including
Judging whether the temperature difference delta T meets the following conditions: Δ T > 0; if Δ T >0, the time T varies per unit temperatureTTo determine whether to enter humidity regulation; and if the delta T is less than or equal to 0, determining whether to enter humidity regulation or not according to the temperature difference delta T.
3. The temperature and humidity control method of air conditioner according to claim 2, wherein the time t varies according to unit temperatureTTo determine whether to enter humidity regulation, including
Acquiring real-time temperature, and calculating unit temperature change time t according to the acquired real-time temperatureT；
Determining a net thermal load value ST corresponding to the current unit temperature change time tT according to a preset mapping relation table of the unit temperature change time and the net thermal load value;
and determining whether to enter humidity regulation or not according to the net heat load value ST.
4. The method as claimed in claim 3, wherein the determining whether to enter humidity control according to the net thermal load ST comprises
When the net heat load value ST is 0, controlling the air conditioner to directly enter humidity regulation;
when the net heat load value ST is less than 0, the inner fan is adjusted to a low windshield to operate, and then the air conditioner is controlled to enter humidity regulation and control;
and when the net heat load value ST is greater than 0, controlling the air conditioner to keep refrigerating operation and returning to the initial state of the temperature and humidity linkage control mode.
5. The method as claimed in claim 2, wherein the determining whether to enter humidity control according to the temperature difference Δ T comprises
When the temperature difference delta T is judged to be less than or equal to 0, controlling the operation of the low windshield of the inner fan;
judging whether the temperature difference delta T meets the following conditions: if the delta T is less than the set temperature difference, controlling the compressor to stop and returning to the initial state of the temperature and humidity linkage control mode again; if delta T is more than or equal to 0 and is more than or equal to the set temperature difference, the air conditioner is controlled to enter humidity regulation.
6. The temperature and humidity control method of an air conditioner according to any one of claims 1 to 5, wherein the humidity difference Δ R is calculated according to the real-time humidity and the humidity set by the user, and the unit humidity change time t is calculated according to the humidity difference Δ RTAnd inner tube temperature TPipeTo determine a control strategy for an air conditioner, comprising
Acquiring real-time humidity, and calculating unit humidity change time t according to the acquired real-time humidityR；
Determining the current unit humidity change time t according to a preset mapping relation table of the unit humidity change time and the net humidity load valueRThe corresponding wet load value SR;
according to the humidity difference delta R, the humidity load value SR and the inner pipe temperature TPipeTo determine whether to enter humidity regulation.
7. The temperature and humidity control method of air conditioner according to claim 6, wherein the temperature and humidity control method is based onThe humidity difference Delta R, the humidity load value SR and the inner tube temperature TPipeTo determine whether to enter humidity regulation, including
When the humidity difference Δ R >0, when SR is 0, the inner tube temperature T is measuredPipe< dew point temperature TDew pointKeeping the running state of the system; if the inner pipe is at temperature TPipeNot less than dew point temperature TDew pointReducing the opening of the expansion valve;
when SR is greater than 0, increase the compressor running frequency;
when SR <0, keep the system running state.
8. The temperature and humidity control method of air conditioner according to claim 6, wherein the temperature and humidity control method is based on the humidity difference Δ R, the humidity load value SR and the inner tube temperature TPipeTo determine whether to enter humidity regulation, further comprising
When the humidity difference Δ R is less than or equal to 0, when SR is 0, the inner tube temperature T is measuredPipe< dew point temperature TDew pointIncreasing the opening of the expansion valve; if the inner pipe is at temperature TPipeNot less than dew point temperature TDew pointKeeping the running state of the system;
when SR is greater than 0, keeping the system running state;
and when the SR is less than 0, reducing the running frequency of the compressor.
9. A control apparatus, comprising one or more processors and a non-transitory computer-readable storage medium storing program instructions which, when executed by the one or more processors, are configured to implement the method of any one of claims 1-8.
10. An air conditioner characterised in that it employs the method of any one of claims 1 to 8 or includes the control apparatus of claim 9.
CN202210176959.5A 2022-02-25 2022-02-25 Air conditioner temperature and humidity control method and air conditioner Active CN114484805B (en)

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