CN111550910A - Variable-frequency precision air conditioner and dehumidification control method and storage medium thereof - Google Patents
Variable-frequency precision air conditioner and dehumidification control method and storage medium thereof Download PDFInfo
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- CN111550910A CN111550910A CN202010430523.5A CN202010430523A CN111550910A CN 111550910 A CN111550910 A CN 111550910A CN 202010430523 A CN202010430523 A CN 202010430523A CN 111550910 A CN111550910 A CN 111550910A
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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
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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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
- F24F11/70—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
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- 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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- Air Conditioning Control Device (AREA)
Abstract
The invention provides a frequency conversion precision air conditioner and a dehumidification control method and a storage medium thereof, wherein in the method, a difference value T (k) between an actual return air temperature difference value and a target return air temperature difference value is substituted into a PI algorithm as a variable every other capacity calculation period A to calculate the rotating speed S of a fan in the capacity calculation period to operate, and a difference value H (k) between a return air humidity detection value H1 and a return air humidity set value Hs is substituted into the PI algorithm as a variable every other capacity calculation period B to calculate the frequency F of a compressor in the capacity calculation period to operate, so that the frequency conversion precision air conditioner can reduce energy consumption in the dehumidification process, improve the dehumidification effect and reduce temperature fluctuation.
Description
Technical Field
The invention relates to an adjusting method of a variable frequency precision air conditioner, in particular to the variable frequency precision air conditioner, a dehumidification control method of the variable frequency precision air conditioner and a storage medium of the variable frequency precision air conditioner.
Background
The existing variable-frequency precise air conditioner is a precise air conditioner with variable air volume and variable compressor frequency, is mainly applied to high-precision environments such as computer rooms, satellite mobile communication stations, large-scale medical equipment rooms, laboratories, test rooms, precise electronic instrument production workshops and the like, has high requirements on air temperature and air humidity, and needs to operate uninterruptedly for a long time.
In order to ensure that the temperature and the humidity of the variable-frequency precise air conditioner are within a set range, the adjustment can be carried out by adopting the modes of reducing the air quantity, improving the frequency of a compressor and starting auxiliary electric heating.
However, these methods have the following disadvantages:
(1) when the heat load is low and the humidity is high, the temperature of a room is too low in the dehumidification process of the air conditioner, and the room needs to be compensated by starting auxiliary electric heating to achieve cold and heat offset, so that the energy consumption of the variable-frequency precise air conditioner is increased;
(2) when the refrigerating output that the dehumidification process produced can't be offset by the maximum heating capacity of frequency conversion precision air conditioner, room temperature will be lower and lower to trigger low temperature protection shutdown compressor and make frequency conversion precision air conditioner withdraw from dehumidification function, until room temperature risees gradually, frequency conversion precision air conditioner just gets into dehumidification mode once more, so endless working method will reduce frequency conversion precision air conditioner's dehumidification effect, also can increase room temperature's fluctuation simultaneously.
Disclosure of Invention
The invention provides a variable frequency precision air conditioner, a dehumidification control method and a storage medium thereof, aiming at solving or partially solving the problems.
Therefore, the dehumidification control method of the variable-frequency precise air conditioner comprises the following steps of:
a temperature acquisition step, wherein the values of return air temperature T1 and air supply temperature T2 are acquired and stored once every other capacity calculation period A;
calculating a difference value T (k), namely calculating a difference value between the return air temperature T1 and the air supply temperature T2, wherein the difference value is a return air temperature difference actual value, and calculating a difference value T (k) between the return air temperature difference actual value and a set return air temperature difference target value;
a fan rotating speed S calculation step, wherein the difference value T (k) is used as a variable and substituted into a PI algorithm to obtain the fan rotating speed S of the current capacity calculation period A so as to control the fan to operate;
a return air humidity H1 collection step, wherein the value of the return air humidity H1 is collected and stored once every other capacity calculation period B;
a difference value H (k) calculation step of calculating a difference value H (k) between the return air humidity H1 and a set return air humidity value Hs;
and a compressor frequency F calculation step, wherein the difference value H (k) is used as a variable to be substituted into the PI algorithm to obtain the compressor frequency F of the current capacity calculation period B to control the operation of the compressor.
Further, the method also comprises the step of preventing the compressor from stopping, and specifically comprises the following steps:
setting a dehumidification low-temperature protection difference value delta T, and solving a difference value between the return air temperature T1/air supply temperature T2 of the current capacity calculation period B and a corresponding temperature set value, wherein the difference value is used as a temperature control deviation Tsh;
and comparing the temperature control deviation Tsh with the dehumidification low-temperature protection difference value delta T, and reducing the frequency F of the compressor according to the comparison result.
Further, the reducing the compressor frequency F according to the comparison result further includes:
if Tsh is less than or equal to (the characteristic temperature difference is 1-delta T), the compressor is controlled to reduce the frequency of the compressor at a set speed f until the frequency of the compressor is reduced to the set lowest frequency of the compressor, and the characteristic temperature difference 1 is a set value.
Further, after the compressor frequency is reduced to the lowest compressor frequency, when Tsh > (the characteristic temperature difference 2-delta T), the compressor frequency F is compared with the set compressor target frequency, the frequency of the compressor is adjusted according to the comparison result, and the characteristic temperature difference 2 is a set value.
Further, the adjusting the frequency of the compressor according to the comparison result further includes:
(1) if the frequency F of the compressor is not less than the target frequency of the compressor, controlling the compressor to operate by taking the target frequency of the compressor as the frequency of the compressor;
(2) and if the frequency F of the compressor is less than the target frequency of the compressor, keeping the compressor running at the current frequency F of the compressor until the temperature control deviation Tsh is more than or equal to the characteristic temperature difference 3, executing the step of collecting the return air humidity H1 again, and recalculating the obtained frequency F of the compressor to control the running of the compressor, wherein the characteristic temperature difference 3 is a set value.
Further, the substituted PI algorithm for the difference t (k) is specifically:
in the formula, KPIs the fan proportionality coefficient, KIFor the fan integral coefficient, C1 is the minimum fan speed.
Further, the substituted PI algorithm for the difference h (k) is specifically:
in the formula, KP' is the compressor proportionality coefficient, KI' compressor integral coefficient, C2 is compressor start frequency.
Also included is a storage medium storing a computer program which, when executed by a processor, implements the method described above.
A variable frequency precision air conditioner is characterized in that a fan is installed in an indoor unit of the variable frequency precision air conditioner, a return air side and an air supply side are respectively arranged in the indoor unit, a return air temperature sensor and a return air humidity sensor are installed on the return air side of the indoor unit, and an air supply temperature sensor is installed on the air supply side of the indoor unit; the outdoor unit comprises a compressor arranged in the outdoor unit;
the system controller is respectively and electrically connected with an air supply temperature sensor, an air return temperature sensor and an air return humidity sensor to acquire signals, and is also respectively and electrically connected with a fan and a compressor of the air conditioner to control the rotating speed of the fan and the frequency of the compressor;
further comprising a memory arranged to store computer executable instructions,
the system controller is arranged to store computer executable instructions which, when executed, cause the system controller to carry out the method described above.
Further, the compressor is provided in an indoor unit, further comprising a memory arranged to store computer executable instructions, the system controller being arranged to store computer executable instructions which, when executed, cause the system controller to implement the method described above.
Has the advantages that:
the invention discloses a dehumidification control method of a variable-frequency precision air conditioner, which is characterized in that a difference value T (k) between a return air temperature difference actual value and a return air temperature difference target value is substituted into a PI (proportional integral) algorithm as a variable to calculate a fan rotating speed S in a capacity calculation period every other capacity calculation period A, a difference value H (k) between a return air humidity detection value H1 and a return air humidity set value Hs is substituted into the PI algorithm as a variable to calculate a frequency F of a compressor in the capacity calculation period every other capacity calculation period B, a system controller in the air conditioner controls the rotating speed of the fan according to the fan rotating speed S, and the frequency of the compressor is controlled according to the frequency F of the compressor, so that the variable-frequency precision air conditioner can reduce energy consumption in a dehumidification process, improve the effect and reduce temperature fluctuation.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a flow chart of a dehumidification control method of a variable frequency precision air conditioner according to the present invention;
FIG. 2 is a schematic structural diagram of an electronic device according to the present invention;
fig. 3 is a schematic structural diagram of a computer-readable storage medium according to the present invention.
Description of reference numerals: 21-a processor; 22-a memory; 23-storage space; 24-program code; 31-program code.
Detailed Description
The invention is further described with reference to the following examples.
The dehumidification control method of the embodiment is used for controlling a conventional variable-frequency precision air conditioner, wherein a fan is installed in an indoor unit of the air conditioner, a return air side and an air supply side exist in the indoor unit due to the rotation of the fan, a return air temperature sensor and a return air humidity sensor are installed on the return air side of the indoor unit and are respectively used for detecting a return air temperature T1 and a return air humidity H1, and an air supply temperature sensor is installed on the air supply side of the indoor unit and is used for detecting an air supply temperature T2; the outdoor unit also comprises a compressor, and the manufacturer can arrange the compressor in the indoor unit or the outdoor unit according to the design.
The system controller is respectively and electrically connected with an air supply temperature sensor, an air return temperature sensor and an air return humidity sensor to collect signals, and is also respectively and electrically connected with a fan and a compressor of the air conditioner to control the rotating speed of the fan and the frequency of the compressor.
In the dehumidification control method of the variable-frequency precise air conditioner in the embodiment, the system controller calculates the rotation speed S of the fan once every other capacity calculation period a, and calculates the frequency F of the compressor once every other capacity calculation period B, so that the rotation speed S of the fan and the frequency F of the compressor are continuously adjusted by the method, the effects of reducing energy consumption in the dehumidification process of the variable-frequency precise air conditioner, improving the dehumidification effect and reducing temperature fluctuation are achieved, as shown in fig. 1, the specific method is as follows:
i, temperature acquisition step: the system controller respectively collects the values of the return air temperature T1 and the air supply temperature T2 once every other capacity calculation period A (for example, 30 seconds) and stores the values in the system controller;
obtaining the difference value T (k): calculating the difference between the return air temperature T1 and the supply air temperature T2, wherein the difference is an actual return air temperature difference value, and the difference T (k) between the actual return air temperature difference value and a set target return air temperature difference value (for example, 20 ℃) is calculated;
and III, calculating the rotating speed S of the fan: substituting the difference value T (k) into the following PI formula by taking the difference value T (k) as a variable to calculate the fan rotating speed S of the current capacity calculation period A;
in the formula, KPIs the fan proportionality coefficient, KIFor the fan integral coefficient, C1 is the minimum fan speed.
This embodiment is through the control object who regards as fan control rotational speed output with the difference of sending back the wind difference in temperature of air conditioner, and its advantage lies in can realizing reducing the fan rotational speed through the big difference in temperature of drawing, provides dehumidification efficiency, and the negative deviation of temperature is too big when can avoiding simultaneously dehumidifying, reduces the temperature fluctuation.
IV, collecting return air humidity H1: the system controller collects the value of return air humidity H1 once every other capacity calculation period B (for example, 5 seconds) and stores the value in the system controller;
v, difference value H (k) obtaining step: calculating the difference H (k) between the return air humidity H1 and a set return air humidity set value Hs;
VII, calculating the frequency F of the compressor: substituting the difference value H (k) as a variable into the following PI formula to calculate the compressor frequency F of the current capacity calculation period B;
in the formula, KP' is the compressor proportionality coefficient, KI' compressor integral coefficient, C2 is compressor start frequency.
In the embodiment, the humidity difference value h (k) is used as the control object of the frequency output of the compressor, and the method has the advantages that the dehumidification is performed in a compressor refrigeration mode, the dehumidification capacity and the frequency output of the compressor are hooked, and the larger the humidity difference value h (k), the larger the dehumidification requirement is, and the higher the frequency output by the compressor is.
Further, for preventing that the compressor from with being less than the compressor minimum frequency operation, and lead to shutting down, when improving dehumidification effect, reduce the temperature and fluctuate, avoid the compressor to switch repeatedly and lead to the increase of the energy consumption of the accurate air conditioner dehumidification in-process of frequency conversion, specifically, set up the step that the compressor shut down, as follows:
setting a dehumidification low-temperature protection difference delta T (for example, 2 ℃), a characteristic temperature 1 (for example, 0.5 ℃), a characteristic temperature 2 (for example, 1 ℃), a characteristic temperature difference 2 > the characteristic temperature difference 1, collecting the return air temperature T1 or the supply air temperature T2 in the current capacity calculation period B, calculating the difference between the return air temperature T1 and a temperature set value, or calculating the difference between the supply air temperature T2 and the temperature set value, wherein the differences are temperature control deviations Tsh;
if the system controller controls and detects that the temperature control deviation Tsh is less than or equal to (the characteristic temperature is 1-delta T) is 0.5-2 (-1.5) in the dehumidification process of the variable-frequency precision air conditioner, the frequency of the compressor is controlled to be reduced at a fixed speed f until the frequency of the compressor is reduced to the lowest frequency of the compressor, so that the frequency of the compressor can be controlled smoothly, and the overlarge temperature fluctuation is avoided.
The lowest frequency of the compressor can be set arbitrarily by a user, and is also set as the lowest frequency at which the compressor can operate.
The present embodiment further includes, in the step of preventing the compressor from being stopped, the following means for preventing the compressor from being stopped:
the frequency of the compressor is reduced at a fixed speed f until the frequency of the compressor is reduced to the lowest frequency of the compressor, and when the temperature control deviation Tsh is greater than (characteristic temperature 2-delta T) is 1-2 (-1), the frequency of the compressor can be further adjusted according to the following judgment so as to smoothly control the frequency of the compressor, avoid the phenomenon that the compressor is shut down and restarted because the compressor suddenly operates at a frequency lower than the lowest frequency of the compressor, and reduce the energy consumption of the variable-frequency precision air conditioner in the dehumidification process:
(1) if the system controller detects that the compressor frequency F of the current capacity calculation period B is larger than or equal to the target frequency (set value) of the compressor, the system controller controls the compressor to operate by taking the target frequency of the compressor as the frequency of the compressor;
(2) if the system controller detects that the compressor frequency F of the current capacity calculation period B is less than the target frequency (set value) of the compressor, the system controller controls the compressor to keep the current compressor frequency F to operate until the temperature control deviation Tsh is greater than or equal to the characteristic temperature 3 (for example, -0.5 ℃), then the step of collecting the return air humidity H1 is executed, and the compressor frequency F is continuously calculated by the PI algorithm to control the operation of the compressor.
By the method in the embodiment, the humidity of the air conditioner can be reduced in the dehumidification process, the temperature can be guaranteed to be within the control range, additional electric heating is not needed for thermal compensation, and the problems that the existing frequency conversion precision air conditioner is large in energy consumption in the dehumidification process, unobvious in dehumidification effect and large in temperature fluctuation in the dehumidification process are solved.
It should be noted that:
the method of the present embodiment may be implemented by a method that is converted into program steps and apparatuses that can be stored in a computer storage medium and invoked and executed by a controller.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus nor is the particular language used to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It will be appreciated by those skilled in the art that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components of the apparatus for detecting a wearing state of an electronic device according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
For example, fig. 2 shows a schematic structural diagram of an electronic device according to an embodiment of the invention. The electronic device conventionally comprises a processor 21 and a memory 22 arranged to store computer-executable instructions (program code). The memory 22 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. The memory 22 has a storage space 23 storing program code 24 for performing any of the method steps in the embodiments. For example, the storage space 23 for the program code may comprise respective program codes 24 for implementing respective steps in the above method. The program code can be read from or written to one or more computer program products. These computer program products comprise a program code carrier such as a hard disk, a Compact Disc (CD), a memory card or a floppy disk. Such a computer program product is typically a computer readable storage medium such as described in fig. 3. The computer readable storage medium may have memory segments, memory spaces, etc. arranged similarly to the memory 22 in the electronic device of fig. 2. The program code may be compressed, for example, in a suitable form. In general, the memory unit stores program code 31 for performing the steps of the method according to the invention, i.e. program code readable by a processor such as 21, which when run by an electronic device causes the electronic device to perform the individual steps of the method described above.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (10)
1. A dehumidification control method of a variable-frequency precise air conditioner is characterized by comprising the following steps:
a temperature acquisition step, wherein the values of return air temperature T1 and air supply temperature T2 are acquired and stored once every other capacity calculation period A;
calculating a difference value T (k), namely calculating a difference value between the return air temperature T1 and the air supply temperature T2, wherein the difference value is a return air temperature difference actual value, and calculating a difference value T (k) between the return air temperature difference actual value and a set return air temperature difference target value;
a fan rotating speed S calculation step, wherein the difference value T (k) is used as a variable and substituted into a PI algorithm to obtain the fan rotating speed S of the current capacity calculation period A so as to control the fan to operate;
a return air humidity H1 collection step, wherein the value of the return air humidity H1 is collected and stored once every other capacity calculation period B;
a difference value H (k) calculation step of calculating a difference value H (k) between the return air humidity H1 and a set return air humidity value Hs;
and a compressor frequency F calculation step, wherein the difference value H (k) is used as a variable to be substituted into the PI algorithm to obtain the compressor frequency F of the current capacity calculation period B to control the operation of the compressor.
2. The dehumidification control method of the variable-frequency precise air conditioner according to claim 1, further comprising a step of preventing the compressor from stopping, specifically:
setting a dehumidification low-temperature protection difference value delta T, and solving a difference value between the return air temperature T1 or the air supply temperature T2 of the current capacity calculation period B and a corresponding temperature set value, wherein the difference value is used as a temperature control deviation Tsh;
and comparing the temperature control deviation Tsh with the dehumidification low-temperature protection difference value delta T, and reducing the frequency F of the compressor according to the comparison result.
3. The dehumidification control method of the variable-frequency precise air conditioner according to claim 2, wherein the reducing the frequency F of the compressor according to the comparison result further comprises:
if Tsh is less than or equal to (the characteristic temperature difference is 1-delta T), the compressor is controlled to reduce the frequency of the compressor at a set speed f until the frequency of the compressor is reduced to the set lowest frequency of the compressor, and the characteristic temperature difference 1 is a set value.
4. The dehumidification control method of the variable-frequency precise air conditioner according to claim 3, characterized in that: after the compressor frequency is reduced to the lowest compressor frequency, when Tsh > (the characteristic temperature difference is 2-delta T), the compressor frequency F is compared with the set target compressor frequency, the frequency of the compressor is adjusted according to the comparison result, and the characteristic temperature difference 2 is a set value.
5. The dehumidification control method of the variable-frequency precise air conditioner according to claim 4, wherein the adjusting the frequency of the compressor according to the comparison result further comprises:
(1) if the frequency F of the compressor is not less than the target frequency of the compressor, controlling the compressor to operate by taking the target frequency of the compressor as the frequency of the compressor;
(2) and if the frequency F of the compressor is less than the target frequency of the compressor, keeping the compressor running at the current frequency F of the compressor until the temperature control deviation Tsh is more than or equal to the characteristic temperature difference 3, executing the step of collecting the return air humidity H1 again, and recalculating the obtained frequency F of the compressor to control the running of the compressor, wherein the characteristic temperature difference 3 is a set value.
6. The dehumidification control method of the variable-frequency precise air conditioner according to claim 1, wherein the PI algorithm to be substituted by the difference value t (k) is specifically:
in the formula, KP is a fan proportionality coefficient, KI is a fan integral coefficient, and C1 is the lowest rotation speed of the fan.
7. The dehumidification control method of the variable-frequency precise air conditioner according to claim 1, wherein the PI algorithm to be substituted by the difference h (k) is specifically:
in the formula, KP 'is the proportional coefficient of the compressor, KI' is the integral coefficient of the compressor, and C2 is the starting frequency of the compressor.
8. Storage medium storing a computer program which, when executed by a processor, implements the method according to any one of claims 1-7.
9. The air conditioner comprises a variable-frequency precision air conditioner, a fan, a temperature sensor, a humidity sensor, a temperature sensor, a humidity sensor, a temperature; the outdoor unit comprises a compressor arranged in the outdoor unit;
the system controller is respectively and electrically connected with an air supply temperature sensor, an air return temperature sensor and an air return humidity sensor to acquire signals, and is also respectively and electrically connected with a fan and a compressor of the air conditioner to control the rotating speed of the fan and the frequency of the compressor;
and a memory arranged to store computer executable instructions, wherein,
the system controller is arranged to store computer executable instructions which, when executed, cause the system controller to implement the method of any one of claims 1-7.
10. The inverter precision air conditioner of claim 9, wherein the compressor is disposed in an indoor unit, further comprising a memory arranged to store computer executable instructions, the system controller being arranged to store computer executable instructions that, when executed, cause the system controller to implement the method of any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010430523.5A CN111550910B (en) | 2020-05-20 | 2020-05-20 | Variable-frequency precision air conditioner and dehumidification control method and storage medium thereof |
Applications Claiming Priority (1)
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