CN113958997B - Frequency control method and device of multi-split air conditioner and air conditioning system - Google Patents

Frequency control method and device of multi-split air conditioner and air conditioning system Download PDF

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Publication number
CN113958997B
CN113958997B CN202111315036.5A CN202111315036A CN113958997B CN 113958997 B CN113958997 B CN 113958997B CN 202111315036 A CN202111315036 A CN 202111315036A CN 113958997 B CN113958997 B CN 113958997B
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air conditioner
split air
frequency
controlling
enter
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CN113958997A (en
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刘杰
庞伟
廖禛
赖孝成
华洪香
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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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—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
    • 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
    • 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
    • F24F11/88—Electrical aspects, e.g. 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
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • 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

Abstract

The application provides a frequency control method and device of a multi-split air conditioner and an air conditioning system, wherein the method comprises the following steps: under the condition that an external machine is started or the load of the multi-split air conditioner suddenly changes, controlling the multi-split air conditioner to enter a frequency modulation mode, wherein the frequency modulation mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a first preset range; calculating a target frequency according to the current operating parameters and the current environmental parameters; adjusting the operating frequency of the multi-split air conditioner to a target frequency; the method comprises the steps that when the multi-split air conditioner enters a frequency modulation mode to reach first preset time or runs at a target frequency for second preset time, the multi-split air conditioner is controlled to enter a stable mode, the stable mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a second preset range, and the interval of the second preset range is a sub-interval of the first preset range, so that the problem that the comfort is poor due to the fact that the frequency cannot be adjusted in time when the load of the multi-split air conditioner is suddenly changed in the prior art is solved.

Description

Frequency control method and device of multi-split air conditioner and air conditioning system
Technical Field
The application relates to the technical field of multi-split air conditioners, in particular to a frequency control method and device of a multi-split air conditioner, a computer readable storage medium, a processor and an air conditioning system.
Background
A multi-split air conditioning system is a system in which one outdoor unit and one compressor drag a plurality of indoor units. The indoor units can be different in type and quantity, and can be freely matched and installed flexibly according to the requirements of users. Therefore, when the indoor unit is used by a user, a plurality of states exist, namely, one indoor unit is turned on, a plurality of indoor units are turned on, and the indoor units of the turning-on part and the turning-off part are turned on. The setting of the wind level, the setting of the temperature, the setting of the humidity, and the like are different for each machine. Therefore, the multi-split air conditioning system is frequently switched to a different load. If the load sudden change is aggravated and the load is not adjusted in time, the system is easy to be protected and shut down or parts are damaged, and if the load sudden change is lightened and the load is not adjusted in time, the comfort is affected.
The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
Disclosure of Invention
The present disclosure provides a frequency control method and apparatus for a multi-split air conditioner, a computer-readable storage medium, a processor, and an air conditioning system, so as to solve a problem in the prior art that a comfort is poor due to a frequency that cannot be adjusted in time when a load of the multi-split air conditioner suddenly changes.
According to an aspect of an embodiment of the present invention, there is provided a frequency control method of a multi-split air conditioner including an external unit and a plurality of internal units, the method including: controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the external unit is started or the load of the multi-split air conditioner suddenly changes, wherein the frequency modulation mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a first preset range, and the load sudden change of the multi-split air conditioner comprises at least one of the following steps: the startup number of the internal machines is changed, the wind gear of the internal machines is changed, the temperature rise rate of the internal machines is greater than a threshold value, and the multi-split air conditioner exits a protection frequency limiting or reducing state; calculating a target frequency according to current operating parameters and current environmental parameters, wherein the operating parameters comprise set temperature, wind gear and capacity code of the internal machine, and the environmental parameters comprise indoor temperature and outdoor temperature; adjusting the operating frequency of the multi-split air conditioner to the target frequency; and under the condition that the multi-split air conditioner enters the frequency modulation mode to reach a first preset time or runs at the target frequency for a second preset time, controlling the multi-split air conditioner to enter a stable mode, wherein the stable mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a second preset range, and the interval of the second preset range is a sub-interval of the first preset range.
Optionally, controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the external unit is turned on or the load of the multi-split air conditioner suddenly changes, where the frequency modulation mode includes: controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the starting number of the internal machines is reduced and the operating frequency of the multi-split air conditioner is less than the target frequency; and controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the starting number of the internal machines is increased and the operating frequency of the multi-split air conditioner is greater than the target frequency.
Optionally, when the external unit is turned on or the load of the multi-split air conditioner suddenly changes, the method for controlling the multi-split air conditioner to enter a frequency modulation mode further includes: under the condition that a wind gear of the internal machine in the heating mode is shifted down and the frequency reduction operation frequency is smaller than the target frequency, controlling the multi-split air conditioner to enter a frequency modulation mode, wherein the frequency reduction operation frequency is the operation frequency of the multi-split air conditioner after the current operation frequency is reduced by a first preset frequency; and controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the wind gear of the internal unit is shifted down or shifted up and the operating frequency of the multi-split air conditioner is smaller than the difference value between the target frequency and a second preset frequency.
Optionally, when the external unit is turned on or the load of the multi-split air conditioner suddenly changes, the method for controlling the multi-split air conditioner to enter the frequency modulation mode further includes: and controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the temperature change rate of the internal machine is greater than a preset rate and the operating frequency of the multi-split air conditioner is less than the difference value between the target frequency and a second preset frequency.
Optionally, when the external unit is turned on or the load of the multi-split air conditioner suddenly changes, the method for controlling the multi-split air conditioner to enter a frequency modulation mode further includes: and controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the multi-split air conditioner exits a protection frequency limiting or reducing state.
Optionally, controlling the multi-split air conditioner to enter a stable mode includes: and controlling the change rate of the operating frequency of the multi-split air conditioner within the preset range.
Optionally, after controlling the multi-split air conditioner to enter a stable mode, the method includes: controlling the multi-split air conditioner to keep the stable mode operation under the condition that the product of a first difference value and a second difference value is larger than 0, wherein the first difference value is the difference value between the operation frequency of the multi-split air conditioner and a first target frequency, the second difference value is the difference value between a second target frequency and the first target frequency, the first target frequency is the target frequency before sudden change of the load of the multi-split air conditioner, and the second target frequency is the target frequency after sudden change of the load of the multi-split air conditioner; and controlling the multi-split air conditioner to keep the stable mode operation and controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the first difference is smaller than the second difference and smaller than 0.
According to another aspect of the embodiments of the present invention, there is also provided a frequency control apparatus of a multi-split air conditioner including an outdoor unit and a plurality of indoor units, the apparatus including: the first control unit is used for controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the external unit is started or the load of the multi-split air conditioner suddenly changes, the frequency modulation mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a first preset range, and the sudden change of the load of the multi-split air conditioner comprises at least one of the following modes: the startup number of the internal machines is changed, the wind gear of the internal machines is changed, the temperature rise rate of the internal machines is greater than a threshold value, and the multi-split air conditioner exits a protection frequency limiting or reducing state; the calculating unit is used for calculating the target frequency according to current operating parameters and current environment parameters, wherein the operating parameters comprise set temperature, wind gear and capability code of the internal machine, and the environment parameters comprise indoor temperature and outdoor temperature; the adjusting unit is used for adjusting the operating frequency of the multi-split air conditioner to the target frequency; and the second control unit is used for controlling the multi-split air conditioner to enter a stable mode under the condition that the multi-split air conditioner enters the frequency modulation mode to reach a first preset time or runs at the target frequency for a second preset time, the stable mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a second preset range, and the interval of the second preset range is a sub-interval of the first preset range.
According to still another aspect of embodiments of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the program executes any one of the methods.
According to another aspect of the embodiments of the present invention, there is also provided a processor, configured to execute a program, where the program executes any one of the methods.
According to still another aspect of the embodiments of the present invention, there is also provided an air conditioning system including a multi-split air conditioner and a frequency control device of the multi-split air conditioner for performing any one of the methods.
In an embodiment of the present invention, in the method for controlling a frequency of a multi-split air conditioner, when the outdoor unit is turned on or a load of the multi-split air conditioner suddenly changes, the multi-split air conditioner is controlled to enter a frequency modulation mode, the frequency modulation mode is a mode in which a frequency change rate of the multi-split air conditioner is controlled within a first predetermined range, and the load of the multi-split air conditioner suddenly changes and includes at least one of the following: the number of the started internal machines is changed, the wind gear of the internal machines is changed, the temperature rise rate of the internal machines is larger than a threshold value, and the multi-split air conditioner exits a protection frequency limiting or reducing state; then, calculating a target frequency according to a current operation parameter and a current environment parameter, wherein the operation parameter comprises a set temperature, a wind gear and a capacity code of the internal machine, and the environment parameter comprises an indoor temperature and an outdoor temperature; then, adjusting the operating frequency of the multi-split air conditioner to the target frequency; and finally, controlling the multi-split air conditioner to enter a stable mode when the multi-split air conditioner enters the frequency modulation mode and reaches a first preset time or operates at the target frequency for a second preset time, wherein the stable mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a second preset range, and the section of the second preset range is a sub-section of the first preset range. The frequency control method of the multi-split air conditioner controls the multi-split air conditioner to be switched between a frequency modulation mode and a stable mode, after an external unit is started, the multi-split air conditioner is controlled to enter the frequency modulation mode, a target frequency is calculated according to current operation parameters and current environment parameters, so that the operation frequency of the multi-split air conditioner is adjusted to the target frequency, after the multi-split air conditioner enters the frequency modulation mode for a first preset time or operates at the target frequency for a second preset time, the frequency change rate of the multi-split air conditioner is controlled to be within a second preset range after the multi-split air conditioner enters the stable mode, and then under the condition that the load of the multi-split air conditioner suddenly changes, the multi-split air conditioner is controlled to enter the frequency modulation mode again.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 illustrates a flowchart of a frequency control method of a multi-split air conditioner according to an embodiment of the present application;
fig. 2 illustrates a schematic diagram of a frequency control apparatus of a multi-split air conditioner according to an embodiment of the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As mentioned in the background of the invention, in order to solve the above-mentioned problem, in the prior art, when the load of the multi-split air conditioner suddenly changes, the frequency cannot be timely adjusted, which results in poor comfort, in a typical embodiment of the present application, a method and an apparatus for controlling the frequency of the multi-split air conditioner, a computer-readable storage medium, a processor, and an air conditioning system are provided.
According to an embodiment of the present application, there is provided a frequency control method of a multi-split air conditioner.
Fig. 1 is a flowchart of a frequency control method of a multi-split air conditioner according to an embodiment of the present application. As shown in fig. 1, the method comprises the steps of:
step S101, when the external unit is turned on or the load of the multi-split air conditioner suddenly changes, controlling the multi-split air conditioner to enter a frequency modulation mode, where the frequency modulation mode is a mode in which a frequency change rate of the multi-split air conditioner is controlled within a first predetermined range, and the sudden load change of the multi-split air conditioner includes at least one of: the number of the started internal machines is changed, the wind gear of the internal machines is changed, the temperature rise rate of the internal machines is larger than a threshold value, and the multi-split air conditioner exits a protection frequency limiting or reducing state;
step S102, calculating a target frequency according to a current operation parameter and a current environment parameter, wherein the operation parameter comprises a set temperature, a wind gear and a capability code of the internal machine, and the environment parameter comprises an indoor temperature and an outdoor temperature;
step S103, adjusting the operating frequency of the multi-split air conditioner to the target frequency;
and step S104, when the multi-split air conditioner enters the frequency modulation mode and reaches a first preset time or runs at the target frequency for a second preset time, controlling the multi-split air conditioner to enter a stable mode, wherein the stable mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a second preset range, and the section of the second preset range is a sub-section of the first preset range.
In the frequency control method of the multi-split air conditioner, first, when the external unit is turned on or the load of the multi-split air conditioner suddenly changes, the multi-split air conditioner is controlled to enter a frequency modulation mode, the frequency modulation mode is a mode in which the frequency change rate of the multi-split air conditioner is controlled within a first predetermined range, and the sudden load change of the multi-split air conditioner includes at least one of the following: the number of the started internal machines is changed, the wind gear of the internal machines is changed, the temperature rise rate of the internal machines is larger than a threshold value, and the multi-split air conditioner exits a protection frequency limiting or reducing state; then, calculating a target frequency according to a current operation parameter and a current environment parameter, wherein the operation parameter comprises a set temperature, a wind gear and a capacity code of the internal machine, and the environment parameter comprises an indoor temperature and an outdoor temperature; then, adjusting the operating frequency of the multi-split air conditioner to the target frequency; and finally, controlling the multi-split air conditioner to enter a stable mode when the multi-split air conditioner enters the frequency modulation mode and reaches a first preset time or operates at the target frequency for a second preset time, wherein the stable mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a second preset range, and the section of the second preset range is a sub-section of the first preset range. The frequency control method of the multi-split air conditioner controls the multi-split air conditioner to be switched between a frequency modulation mode and a stable mode, after an external unit is started, the multi-split air conditioner is controlled to enter the frequency modulation mode, a target frequency is calculated according to current operation parameters and current environment parameters, so that the operation frequency of the multi-split air conditioner is adjusted to the target frequency, after the multi-split air conditioner enters the frequency modulation mode for a first preset time or operates at the target frequency for a second preset time, the frequency change rate of the multi-split air conditioner is controlled to be within a second preset range after the multi-split air conditioner enters the stable mode, and then under the condition that the load of the multi-split air conditioner suddenly changes, the multi-split air conditioner is controlled to enter the frequency modulation mode again.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
It should be noted that the above target frequency is calculated by F = m · Φ + n, where m and n are coefficients determined by the number of operating internal machines, and Φ = =ΣΦ + n i ，Φ i ＝A(Tni,Tw)*B i *C i *D i And the number of the indoor unit is i =1,2, … …, the number Tni is the environment temperature of the ith indoor unit, the number Tw is the outdoor environment temperature, and the number B is the number of the indoor unit i Is the ith indoor unit wind gear coefficient, C i Setting a difference (demand) coefficient between the temperature of the ith internal unit and the indoor ambient temperature, D i For the i-th internal set capability code, a (Tni, tw) = a × Tni 2 +b*Tw 2 + c Tni Tw + d Tni + e Tw + f, a (Tni, tw) is the capacity requirement of the i-th indoor unit determined based on the outdoor ambient temperature, the i-th indoor unit ambient temperature and the coefficients a, b, c, d, e, f. The target frequency calculation basically covers main conditions which can influence the system demand frequency under the current conditions, and in fact, as long as the input conditions can influence the initial target frequency calculation, the target frequency calculation can be used as one of variables to participate in the initial target frequency calculation, such as humidity, indoor space size, house orientation, illumination duration, people flow, door opening and closing times and the like.
More specifically, for a multi-split air conditioner, the operation number of the internal machines and the capacity of each internal machine are main influence factors of the operation frequency, and the capacity code of each internal machine is as follows: 1p, 26,1.5p, 32 to 35,2p, 50,3p, and n are the following parameters, m and n are widely different, for example, the number of operating indoor units is 1, m =0.7, n =5, the number of operating indoor units is 2, m =0.85, n = -1, the number of operating indoor units is 3, m =0.85, n = -4, the number of operating indoor units is 4, m =0.75, n = -5, the number of operating indoor units is 5, m =0.75, n = -7.
In addition, the first predetermined time and the second predetermined time may be set according to an actual value, and more specifically, a value range of the first predetermined time is 8 to 10 minutes, and a value range of the first predetermined time is 3 to 5 minutes.
In an embodiment of the application, when the external unit is turned on or the load of the multi-split air conditioner suddenly changes, the method for controlling the multi-split air conditioner to enter the frequency modulation mode includes: controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the starting number of the internal machines is reduced and the operating frequency of the multi-split air conditioner is smaller than the target frequency; and controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the starting number of the inner machines is increased and the running frequency of the multi-split air conditioner is greater than the target frequency. Specifically, when a part of the internal machines are started up, the number of the started internal machines is reduced, and the current operating frequency of the multi-split air conditioner is smaller than the target frequency, the multi-split air conditioner can be controlled to enter a frequency modulation mode, so that the situation that the load mutation causes the protection shutdown is avoided, the number of the started internal machines is increased when the part of the internal machines are stopped or shut down, and the current operating frequency of the multi-split air conditioner is larger than the target frequency, the multi-split air conditioner can be controlled to enter the frequency modulation mode, so that the situation that the load mutation causes the protection shutdown is avoided, of course, only the number of the started internal machines is reduced or increased, and the multi-split air conditioner can also be directly controlled to enter the frequency modulation mode.
In an embodiment of the application, when the external unit is turned on or the load of the multi-split air conditioner suddenly changes, the multi-split air conditioner is controlled to enter a frequency modulation mode, and the method further includes: and under the condition that the wind gear of the internal machine in the heating mode is shifted down and the frequency reduction operation frequency is smaller than the target frequency, controlling the multi-split air conditioner to enter a frequency modulation mode, wherein the frequency reduction operation frequency is the operation frequency of the multi-split air conditioner after the current operation frequency is reduced by a first preset frequency, and under the condition that the wind gear of the internal machine is shifted up or shifted down and the operation frequency of the multi-split air conditioner is smaller than the difference value between the target frequency and a second preset frequency, controlling the multi-split air conditioner to enter the frequency modulation mode. Specifically, in the heating mode, the wind gear of the internal machine is changed from other wind gears to a low wind gear or a lower wind gear, the frequency of the compressor immediately performs wind gear conversion and frequency reduction operation, the first preset frequency can be 5-10 Hz, at the moment, the current operating frequency is lower than the initial target frequency, the stable mode exits and the frequency modulation mode enters, and the wind gears of the internal machine under other conditions are converted, namely, the wind gear of the internal machine is shifted up or shifted down, at the moment, the current operating frequency is lower than the difference value between the target frequency and the second preset frequency, and the second preset frequency can be 4-6 Hz, the stable mode exits and the frequency modulation mode enters.
In an embodiment of the present application, when the external unit is powered on or the load of the multi-split air conditioner suddenly changes, the multi-split air conditioner is controlled to enter a frequency modulation mode, and the method further includes: and controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the temperature change rate of the internal machine is greater than a preset rate and the operating frequency of the multi-split air conditioner is less than the difference value between the target frequency and a second preset frequency. Specifically, if the temperature change rate of the internal unit is greater than a predetermined rate, for example, Δ T of the operating internal unit rises by more than 3 ℃ in 60S, and the current operating frequency is less than the difference between the target frequency and a second predetermined frequency, which may be 4-6 Hz, the stable mode exits and the frequency modulation mode enters.
In an embodiment of the application, when the external unit is turned on or the load of the multi-split air conditioner suddenly changes, the multi-split air conditioner is controlled to enter a frequency modulation mode, and the method further includes: and controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the multi-split air conditioner exits a protection frequency limiting or reducing state. Specifically, the method exits from the protection frequency limiting and reducing state, and exits from the stable mode and enters into the frequency modulation mode when the current operating frequency is smaller than the F initial target frequency.
In an embodiment of the application, controlling the multi-split air conditioner to enter the stable mode includes: and controlling the change rate of the operating frequency of the multi-split air conditioner within the preset range. Specifically, in the stable mode, the change rate of the operating frequency of the multi-split air conditioner is controlled in the predetermined range, that is, -a < Δ F < a, where a >0, the real-time operating frequency in the stable operation is the optimal operating state under the current condition, and when the load change is small, the new dynamic balance can be achieved by periodically adjusting the frequency change Δ F.
In an embodiment of the present application, after controlling the multi-split air conditioner to enter the stable mode, the method may include: controlling the multi-split air conditioner to maintain the stable mode operation when a product of a first difference value and a second difference value is greater than 0, wherein the first difference value is a difference value between an operation frequency of the multi-split air conditioner and a first target frequency, the second difference value is a difference value between a second target frequency and the first target frequency, the first target frequency is the target frequency before sudden load change of the multi-split air conditioner, and the second target frequency is the target frequency after sudden load change of the multi-split air conditioner; and controlling the multi-split air conditioner to keep the stable mode operation and controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the first difference is smaller than the second difference and smaller than 0. Specifically, when the load suddenly changes, the product of the first difference and the second difference is greater than 0, that is, the operating frequency of the multi-split air conditioner and the target frequency after the load of the multi-split air conditioner suddenly changes are both less than the target frequency before the load of the multi-split air conditioner suddenly changes, or the operating frequency of the multi-split air conditioner and the target frequency after the load of the multi-split air conditioner suddenly changes are both greater than the target frequency before the load of the multi-split air conditioner suddenly changes, that is, the actual operating frequency is just in the direction or target in which the target frequency needs to be adjusted, at this time, the stable operating stage does not need to be interrupted, a new dynamic balance can be quickly achieved through the periodic adjustment of the frequency variation Δ F, and otherwise, the multi-split air conditioner needs to be controlled to enter the frequency modulation mode.
In an embodiment of the application, capacities of different internal machines may be different, and whether load sudden change frequency control is executed is judged according to a ratio of capacities of turning off the internal machines or turning on the internal machines to a total sum of capacities of operating the internal machines, for example, powers of three internal machines are respectively 1p, 2p and 3p, corresponding capacities are respectively 26, 35 and 72, a ratio is assumed to be 30%, when an internal machine with a turning-off capacity of 26 is turned off, K = 26/(26 +35+ 72) <30%, a mode is not switched, when an internal machine with a turning-off capacity of 72 is turned off, K = 72/(26 +35+ 72) >30%, the multi-split air conditioner is controlled to enter a stable mode, when a capacity of 35 is turned on, K = 26/(26 +35+ 72) <20%, a mode is not switched, and when an internal machine with a turning-off capacity of 26 is turned on, K = 26/(26 + 35) >20%, the multi-split air conditioner is controlled to enter the stable mode.
The embodiment of the present application further provides a frequency control device of a multi-split air conditioner, and it should be noted that the frequency control device of the multi-split air conditioner in the embodiment of the present application may be used to execute the frequency control method for the multi-split air conditioner provided in the embodiment of the present application. The frequency control device of a multi-split air conditioner provided by the embodiment of the present application is described below, and the multi-split air conditioner includes an external unit and a plurality of internal units.
Fig. 2 is a schematic diagram of a frequency control apparatus of a multi-split air conditioner according to an embodiment of the present application. As shown in fig. 2, the apparatus includes:
a first control unit 10, configured to control the multi-split air conditioner to enter a frequency modulation mode when the external unit is turned on or a load of the multi-split air conditioner suddenly changes, where the frequency modulation mode is a mode in which a frequency change rate of the multi-split air conditioner is controlled within a first predetermined range, and the sudden load change of the multi-split air conditioner includes at least one of: the number of the started internal machines is changed, the wind gear of the internal machines is changed, the temperature rise rate of the internal machines is larger than a threshold value, and the multi-split air conditioner exits a protection frequency limiting or reducing state;
a calculating unit 20, configured to calculate a target frequency according to a current operating parameter and a current environmental parameter, where the operating parameter includes a set temperature, a wind gear, and a capability code of the internal machine, and the environmental parameter includes an indoor temperature and an outdoor temperature;
an adjusting unit 30 for adjusting the operating frequency of the multi-split air conditioner to the target frequency;
and a second control unit 40 configured to control the multi-split air conditioner to enter a stable mode when the multi-split air conditioner enters the frequency modulation mode and reaches a first predetermined time or operates at the target frequency for a second predetermined time, where the stable mode is a mode in which a frequency change rate of the multi-split air conditioner is controlled within a second predetermined range, and the section of the second predetermined range is a sub-section of the first predetermined range.
In the frequency control device of the multi-split air conditioner, the first control unit controls the multi-split air conditioner to enter a frequency modulation mode when the external unit is turned on or the load of the multi-split air conditioner suddenly changes, the frequency modulation mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a first predetermined range, and the sudden load change of the multi-split air conditioner includes at least one of the following: the number of the started internal machines is changed, the wind gear of the internal machines is changed, the temperature rise rate of the internal machines is larger than a threshold value, and the multi-split air conditioner exits a protection frequency limiting or reducing state; the calculating unit calculates a target frequency according to a current operating parameter and a current environment parameter, wherein the operating parameter comprises a set temperature, a wind gear and a capability code of the internal machine, and the environment parameter comprises an indoor temperature and an outdoor temperature; the adjusting unit adjusts the running frequency of the multi-split air conditioner to the target frequency; and a second control unit for controlling the multi-split air conditioner to enter a stable mode when the multi-split air conditioner enters the frequency modulation mode and reaches a first preset time or operates at the target frequency for a second preset time, wherein the stable mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a second preset range, and the section of the second preset range is a sub-section of the first preset range. The frequency control method of the multi-split air conditioner controls the multi-split air conditioner to be switched between a frequency modulation mode and a stable mode, after an external unit is started, the multi-split air conditioner is controlled to enter the frequency modulation mode, a target frequency is calculated according to current operation parameters and current environment parameters, so that the operation frequency of the multi-split air conditioner is adjusted to the target frequency, after the multi-split air conditioner enters the frequency modulation mode for a first preset time or operates at the target frequency for a second preset time, the frequency change rate of the multi-split air conditioner is controlled to be within a second preset range after the multi-split air conditioner enters the stable mode, and then under the condition that the load of the multi-split air conditioner suddenly changes, the multi-split air conditioner is controlled to enter the frequency modulation mode again.
The target frequency is calculated by F = m · Φ + n, where m and n are coefficients determined by the number of operating internal machines, and Φ =ΣΦ + n i ，Φ i ＝A(Tni,Tw)*B i *C i *D i And the number of the indoor unit is i =1,2, … …, the number Tni is the environment temperature of the ith indoor unit, the number Tw is the outdoor environment temperature, and the number B is the number of the indoor unit i Is the ith internal machine wind gear coefficient, C i Setting a difference (demand) coefficient of the temperature and the indoor environment temperature for the ith indoor unit, D i For the i-th inner unit capability code, a (Tni, tw) = a × Tni 2 +b*Tw 2 + c Tni Tw + d Tni + e Tw + f, a (Tni, tw) is the capacity requirement of the i-th indoor unit determined based on the outdoor ambient temperature, the i-th indoor unit ambient temperature and the coefficients a, b, c, d, e, f. The target frequency calculation basically covers main conditions which can influence the system demand frequency under the current conditions, and in fact, as long as the input conditions can influence the initial target frequency calculation, the target frequency calculation can be used as one of variables to participate in the initial target frequency calculation, such as humidity, indoor space size, house orientation, illumination duration, people flow, door opening and closing times and the like.
More specifically, for a multi-split air conditioner, the operation number of the internal machines and the capacity of each internal machine are main influence factors of the operation frequency, and the capacity code of each internal machine is as follows: 1p, 26,1.5p, 32 to 35,2p, 50,3p, 70 to 72, the value of n varies greatly from the number of operating indoor units parameter m to parameter m, for example, the number of operating indoor units is 1, m =0.7, n =5, the number of operating indoor units is 2, m =0.85, n = -1, the number of operating indoor units is 3, m =0.85, n = -4, the number of operating indoor units is 4, m =0.75, n = -5, the number of operating indoor units is 5, m =0.75, n = -7.
In addition, the first predetermined time and the second predetermined time may be set according to an actual value, and more specifically, a value range of the first predetermined time is 8 to 10 minutes, and a value range of the first predetermined time is 3 to 5 minutes.
In an embodiment of the present application, the first control unit includes a first control module and a second control module, where the first control module is configured to control the multi-split air conditioner to enter a frequency modulation mode when the number of the internal machines is decreased and the operating frequency of the multi-split air conditioner is less than the target frequency; the second control module is used for controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the starting-up number of the inner machines is increased and the running frequency of the multi-split air conditioner is greater than the target frequency. Specifically, when a part of the internal machines are started up, the number of the started internal machines is reduced, and the current operating frequency of the multi-split air conditioner is smaller than the target frequency, the multi-split air conditioner can be controlled to enter a frequency modulation mode, so that the situation that the load mutation causes the protection shutdown is avoided, the number of the started internal machines is increased when the part of the internal machines are stopped or shut down, and the current operating frequency of the multi-split air conditioner is larger than the target frequency, the multi-split air conditioner can be controlled to enter the frequency modulation mode, so that the situation that the load mutation causes the protection shutdown is avoided, of course, only the number of the started internal machines is reduced or increased, and the multi-split air conditioner can also be directly controlled to enter the frequency modulation mode.
In an embodiment of the application, the first control unit further includes a third control module and a fourth control module, where the third control module is configured to control the multi-split air conditioner to enter a frequency modulation mode when a wind gear of the internal unit in a heating mode downshifts and a frequency-down operation frequency is less than the target frequency, where the frequency-down operation frequency is an operation frequency of the multi-split air conditioner after a current operation frequency of the multi-split air conditioner is reduced by a first predetermined frequency; the fourth control module is used for controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the wind gear of the inner machine is shifted up or shifted down and the operation frequency of the multi-split air conditioner is smaller than the difference value between the target frequency and a second preset frequency. Specifically, in the heating mode, the wind gear of the internal machine is changed from other wind gears to a low wind gear or a lower wind gear, the frequency of the compressor immediately performs wind gear conversion and frequency reduction operation, the first preset frequency can be 5-10 Hz, at the moment, the current operating frequency is lower than the initial target frequency, the stable mode exits and the frequency modulation mode enters, and the wind gears of the internal machine under other conditions are converted, namely, the wind gear of the internal machine is shifted up or shifted down, at the moment, the current operating frequency is lower than the difference value between the target frequency and the second preset frequency, and the second preset frequency can be 4-6 Hz, the stable mode exits and the frequency modulation mode enters.
In an embodiment of the application, the first control unit further includes a fifth control module, and the fifth control module is configured to control the multi-split air conditioner to enter a frequency modulation mode when a temperature change rate of the internal unit is greater than a predetermined rate and an operating frequency of the multi-split air conditioner is less than a difference between the target frequency and a second predetermined frequency. Specifically, if the temperature change rate of the internal unit is greater than a predetermined rate, for example, Δ T of the operating internal unit rises by more than 3 ℃ in 60S, and the current operating frequency is less than the difference between the target frequency and a second predetermined frequency, which may be 4-6 Hz, the stable mode exits and the frequency modulation mode enters.
In an embodiment of the application, the first control unit further includes a sixth control module, and the sixth control module is configured to control the multi-split air conditioner to enter a frequency modulation mode when the multi-split air conditioner exits a protection frequency limiting state or a frequency reduction state. Specifically, the method exits from the protection frequency limiting and frequency reducing state, exits from the stable mode when the current operating frequency is smaller than the F initial target frequency, and enters into the frequency modulation mode.
In an embodiment of the present application, the second control module includes a seventh control module, and the seventh control module is configured to control a change rate of the operating frequency of the multi-split air conditioner to be within the predetermined range. Specifically, in the stable mode, the change rate of the operating frequency of the multi-split air conditioner is controlled in the predetermined range, that is, -a < Δ F < a, where a >0, the real-time operating frequency in the stable operation is the optimal operating state under the current condition, and when the load change is small, the new dynamic balance can be achieved by periodically adjusting the frequency change Δ F.
In an embodiment of the present application, after controlling the multi-split air conditioner to enter the stable mode, the apparatus includes a third control unit, and the third control unit further includes an eighth control module and a ninth control module, where the eighth control module is configured to control the multi-split air conditioner to maintain the stable mode operation when a product of a first difference value and a second difference value is greater than 0, the first difference value is a difference value between an operation frequency of the multi-split air conditioner and a first target frequency, the second difference value is a difference value between a second target frequency and the first target frequency, the first target frequency is the target frequency before sudden change of load of the multi-split air conditioner, and the second target frequency is the target frequency after sudden change of load of the multi-split air conditioner; the ninth control module is configured to control the multi-split air conditioner to keep the stable mode operation and control the multi-split air conditioner to enter a frequency modulation mode when the first difference is smaller than the second difference and smaller than 0. Specifically, when the load suddenly changes, the product of the first difference and the second difference is greater than 0, that is, the operating frequency of the multi-split air conditioner and the target frequency after the load of the multi-split air conditioner suddenly changes are both less than the target frequency before the load of the multi-split air conditioner suddenly changes, or the operating frequency of the multi-split air conditioner and the target frequency after the load of the multi-split air conditioner suddenly changes are both greater than the target frequency before the load of the multi-split air conditioner suddenly changes, that is, the actual operating frequency is just in the direction or target in which the target frequency needs to be adjusted, at this time, the stable operating stage does not need to be interrupted, a new dynamic balance can be quickly achieved through the periodic adjustment of the frequency variation Δ F, and otherwise, the multi-split air conditioner needs to be controlled to enter the frequency modulation mode.
In an embodiment of the application, capacities of different internal machines may be different, and whether load sudden change frequency control is executed is judged according to a ratio of capacities of turning off the internal machines or turning on the internal machines to a total sum of capacities of operating the internal machines, for example, powers of three internal machines are respectively 1p, 2p and 3p, corresponding capacities are respectively 26, 35 and 72, a ratio is assumed to be 30%, when an internal machine with a turning-off capacity of 26 is turned off, K = 26/(26 +35+ 72) <30%, a mode is not switched, when an internal machine with a turning-off capacity of 72 is turned off, K = 72/(26 +35+ 72) >30%, the multi-split air conditioner is controlled to enter a stable mode, when a capacity of 35 is turned on, K = 26/(26 +35+ 72) <20%, a mode is not switched, and when an internal machine with a turning-off capacity of 26 is turned on, K = 26/(26 + 35) >20%, the multi-split air conditioner is controlled to enter the stable mode.
The embodiment of the application also provides an air conditioning system which comprises a multi-split air conditioner and a frequency control device of the multi-split air conditioner, wherein the frequency control device of the multi-split air conditioner is used for executing any one of the methods.
The air conditioning system includes a multi-split air conditioner and a frequency control device of the multi-split air conditioner, wherein the first control unit controls the multi-split air conditioner to enter a frequency modulation mode when the external unit is turned on or the load of the multi-split air conditioner suddenly changes, the frequency modulation mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a first predetermined range, and the sudden load change of the multi-split air conditioner includes at least one of the following: the number of the started internal machines is changed, the wind gear of the internal machines is changed, the temperature rise rate of the internal machines is larger than a threshold value, and the multi-split air conditioner exits a protection frequency limiting or reducing state; the calculating unit calculates a target frequency according to a current operating parameter and a current environment parameter, wherein the operating parameter comprises a set temperature, a wind gear and a capability code of the internal machine, and the environment parameter comprises an indoor temperature and an outdoor temperature; the adjusting unit adjusts the running frequency of the multi-split air conditioner to the target frequency; and a second control unit for controlling the multi-split air conditioner to enter a stable mode when the multi-split air conditioner enters the frequency modulation mode and reaches a first preset time or operates at the target frequency for a second preset time, wherein the stable mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a second preset range, and the section of the second preset range is a sub-section of the first preset range. The frequency control method of the multi-split air conditioner controls the multi-split air conditioner to be switched between a frequency modulation mode and a stable mode, after an external unit is started, the multi-split air conditioner is controlled to enter the frequency modulation mode, a target frequency is calculated according to current operation parameters and current environment parameters, so that the operation frequency of the multi-split air conditioner is adjusted to the target frequency, after the multi-split air conditioner enters the frequency modulation mode for a first preset time or operates at the target frequency for a second preset time, the frequency change rate of the multi-split air conditioner is controlled to be within a second preset range after the multi-split air conditioner enters the stable mode, and then under the condition that the load of the multi-split air conditioner suddenly changes, the multi-split air conditioner is controlled to enter the frequency modulation mode again.
The frequency control device of the multi-split air conditioner comprises a processor and a memory, wherein the first control unit, the calculating unit, the adjusting unit, the second control unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be set to be one or more than one, and the problem of poor comfort caused by the fact that the frequency cannot be timely adjusted when the load of the multi-split air conditioner suddenly changes in the prior art is solved by adjusting the kernel parameters.
The memory may include volatile memory in a computer readable medium, random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
An embodiment of the present invention provides a computer-readable storage medium on which a program is stored, which when executed by a processor implements the above-described method.
The embodiment of the invention provides a processor, which is used for running a program, wherein the method is executed when the program runs.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein when the processor executes the program, at least the following steps are realized:
step S101, under the condition that the external unit is started or the load of the multi-split air conditioner suddenly changes, controlling the multi-split air conditioner to enter a frequency modulation mode, wherein the frequency modulation mode is a mode for adjusting the running frequency of the multi-split air conditioner according to the load of the multi-split air conditioner, and the sudden load change of the multi-split air conditioner comprises the change of the starting number of the internal unit, the change of the wind gear of the internal unit, the temperature rise rate of the internal unit is greater than a threshold value, and the multi-split air conditioner exits a protection frequency limiting or frequency reducing state;
step S102, calculating a target frequency according to a current operation parameter and a current environment parameter, wherein the operation parameter comprises a set temperature, a wind gear and a capability code of the internal machine, and the environment parameter comprises an indoor temperature and an outdoor temperature;
step S103, adjusting the operating frequency of the multi-split air conditioner to the target frequency;
and step S104, controlling the multi-split air conditioner to enter a stable mode under the condition that the multi-split air conditioner enters the frequency modulation mode for a first preset time or operates at the target frequency for a second preset time, wherein the stable mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a preset range.
The device herein may be a server, a PC, a PAD, a mobile phone, etc.
The present application further provides a computer program product adapted to perform a program initialized with at least the following method steps when executed on a data processing device:
step S101, under the condition that the external unit is started or the load of the multi-split air conditioner suddenly changes, controlling the multi-split air conditioner to enter a frequency modulation mode, wherein the frequency modulation mode is a mode for adjusting the running frequency of the multi-split air conditioner according to the load of the multi-split air conditioner, and the sudden load change of the multi-split air conditioner comprises the change of the starting number of the internal unit, the change of the wind gear of the internal unit, the temperature rise rate of the internal unit is greater than a threshold value, and the multi-split air conditioner exits a protection frequency limiting or frequency reducing state;
step S102, calculating a target frequency according to a current operation parameter and a current environment parameter, wherein the operation parameter comprises a set temperature, a wind gear and a capability code of the internal machine, and the environment parameter comprises an indoor temperature and an outdoor temperature;
step S103, adjusting the operating frequency of the multi-split air conditioner to the target frequency;
and step S104, controlling the multi-split air conditioner to enter a stable mode under the condition that the multi-split air conditioner enters the frequency modulation mode for a first preset time or operates at the target frequency for a second preset time, wherein the stable mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a preset range.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, the technical solution of the present invention, which is substantially or partly contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a computer readable storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned computer-readable storage media comprise: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:
1) In the method for controlling a frequency of a multi-split air conditioner according to the present invention, first, when the external unit is turned on or the load of the multi-split air conditioner suddenly changes, the multi-split air conditioner is controlled to enter a frequency modulation mode, the frequency modulation mode is a mode in which a frequency change rate of the multi-split air conditioner is controlled within a first predetermined range, and the sudden load change of the multi-split air conditioner includes at least one of: the number of the started internal machines is changed, the wind gear of the internal machines is changed, the temperature rise rate of the internal machines is larger than a threshold value, and the multi-split air conditioner exits a protection frequency limiting or reducing state; then, calculating a target frequency according to a current operation parameter and a current environment parameter, wherein the operation parameter comprises a set temperature, a wind gear and a capacity code of the internal machine, and the environment parameter comprises an indoor temperature and an outdoor temperature; then, adjusting the operating frequency of the multi-split air conditioner to the target frequency; and finally, controlling the multi-split air conditioner to enter a stable mode when the multi-split air conditioner enters the frequency modulation mode and reaches a first preset time or operates at the target frequency for a second preset time, wherein the stable mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a second preset range, and the section of the second preset range is a sub-section of the first preset range. The frequency control method of the multi-split air conditioner controls the multi-split air conditioner to be switched between a frequency modulation mode and a stable mode, after an external unit is started, the multi-split air conditioner is controlled to enter the frequency modulation mode, a target frequency is calculated according to current operation parameters and current environment parameters, so that the operation frequency of the multi-split air conditioner is adjusted to the target frequency, after the multi-split air conditioner enters the frequency modulation mode for a first preset time or operates at the target frequency for a second preset time, the frequency change rate of the multi-split air conditioner is controlled to be within a second preset range after the multi-split air conditioner enters the stable mode, and then under the condition that the load of the multi-split air conditioner suddenly changes, the multi-split air conditioner is controlled to enter the frequency modulation mode again.
2) In the frequency control apparatus of a multi-split air conditioner according to the present invention, the first control unit controls the multi-split air conditioner to enter a frequency modulation mode when the external unit is turned on or a load of the multi-split air conditioner suddenly changes, the frequency modulation mode is a mode in which a frequency change rate of the multi-split air conditioner is controlled within a first predetermined range, and the load of the multi-split air conditioner suddenly changes and includes at least one of: the number of the started internal machines is changed, the wind gear of the internal machines is changed, the temperature rise rate of the internal machines is larger than a threshold value, and the multi-split air conditioner exits a protection frequency limiting or reducing state; the calculating unit calculates a target frequency according to a current operating parameter and a current environment parameter, wherein the operating parameter comprises a set temperature, a wind gear and a capability code of the internal machine, and the environment parameter comprises an indoor temperature and an outdoor temperature; the adjusting unit adjusts the running frequency of the multi-split air conditioner to the target frequency; the second control unit controls the multi-split air conditioner to enter a stable mode when the multi-split air conditioner enters the frequency modulation mode and reaches a first preset time or operates at the target frequency for a second preset time, wherein the stable mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a second preset range, and the section of the second preset range is a sub-section of the first preset range. The frequency control method of the multi-split air conditioner controls the multi-split air conditioner to be switched between a frequency modulation mode and a stable mode, after an external unit is switched on, the multi-split air conditioner is controlled to enter the frequency modulation mode, a target frequency is calculated according to a current operation parameter and a current environment parameter, so that the operation frequency of the multi-split air conditioner is adjusted to the target frequency, after the multi-split air conditioner enters the frequency modulation mode for a first preset time or operates at the target frequency for a second preset time, the frequency change rate of the multi-split air conditioner is controlled to be within a second preset range after the multi-split air conditioner enters the stable mode, and then under the condition of sudden load change of the multi-split air conditioner, the multi-split air conditioner is controlled to re-enter the frequency modulation mode.
3) The air conditioning system of the application comprises a multi-split air conditioner and a frequency control device of the multi-split air conditioner, wherein a first control unit controls the multi-split air conditioner to enter a frequency modulation mode under the condition that the external unit is started or the load of the multi-split air conditioner suddenly changes, the frequency modulation mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a first preset range, and the load of the multi-split air conditioner suddenly changes and comprises at least one of the following: the number of the started internal machines is changed, the wind gear of the internal machines is changed, the temperature rise rate of the internal machines is larger than a threshold value, and the multi-connected air conditioner exits a protection frequency limiting or reducing state; the calculating unit calculates a target frequency according to a current operating parameter and a current environment parameter, wherein the operating parameter comprises a set temperature, a wind gear and a capability code of the internal machine, and the environment parameter comprises an indoor temperature and an outdoor temperature; the adjusting unit adjusts the running frequency of the multi-split air conditioner to the target frequency; the second control unit controls the multi-split air conditioner to enter a stable mode when the multi-split air conditioner enters the frequency modulation mode and reaches a first preset time or operates at the target frequency for a second preset time, wherein the stable mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a second preset range, and the section of the second preset range is a sub-section of the first preset range. The frequency control method of the multi-split air conditioner controls the multi-split air conditioner to be switched between a frequency modulation mode and a stable mode, after an external unit is started, the multi-split air conditioner is controlled to enter the frequency modulation mode, a target frequency is calculated according to current operation parameters and current environment parameters, so that the operation frequency of the multi-split air conditioner is adjusted to the target frequency, after the multi-split air conditioner enters the frequency modulation mode for a first preset time or operates at the target frequency for a second preset time, the frequency change rate of the multi-split air conditioner is controlled to be within a second preset range after the multi-split air conditioner enters the stable mode, and then under the condition that the load of the multi-split air conditioner suddenly changes, the multi-split air conditioner is controlled to enter the frequency modulation mode again.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A frequency control method of a multi-split air conditioner, wherein the multi-split air conditioner includes an external unit and a plurality of internal units, the method comprising:
under the condition of sudden load change of the multi-split air conditioner, controlling the multi-split air conditioner to enter a frequency modulation mode, wherein the frequency modulation mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a first preset range, and the sudden load change of the multi-split air conditioner comprises at least one of the following steps: the startup number of the internal machines is changed, the wind gear of the internal machines is changed, the temperature rise rate of the internal machines is greater than a threshold value, and the multi-split air conditioner exits a protection frequency limiting or reducing state;
calculating a target frequency according to current operating parameters and current environment parameters, wherein the operating parameters comprise set temperature, wind gear and capability code of the indoor unit, and the environment parameters comprise indoor temperature and outdoor temperature;
adjusting the operating frequency of the multi-split air conditioner to the target frequency;
when the multi-split air conditioner enters the frequency modulation mode to reach a first preset time or runs at the target frequency for a second preset time, controlling the multi-split air conditioner to enter a stable mode, wherein the stable mode is a mode for controlling the frequency change rate of the multi-split air conditioner within a second preset range, and the interval of the second preset range is a sub-interval of the first preset range, and after the multi-split air conditioner is controlled to enter the stable mode, the method further comprises the following steps: controlling the multi-split air conditioner to keep the stable mode operation under the condition that the product of a first difference value and a second difference value is larger than 0, wherein the first difference value is the difference value between the operation frequency of the multi-split air conditioner and a first target frequency, the second difference value is the difference value between a second target frequency and the first target frequency, the first target frequency is the target frequency before sudden change of the load of the multi-split air conditioner, and the second target frequency is the target frequency after sudden change of the load of the multi-split air conditioner; and controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the product of the first difference and the second difference is less than 0.
2. The method of claim 1, wherein the controlling the multi-split air conditioner to enter a frequency modulation mode in case of the external unit being turned on or the load of the multi-split air conditioner suddenly changing comprises:
controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the starting number of the internal machines is reduced and the operating frequency of the multi-split air conditioner is less than the target frequency;
and controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the starting number of the internal machines is increased and the operating frequency of the multi-split air conditioner is greater than the target frequency.
3. The method of claim 1, wherein the controlling the multi-split air conditioner to enter a frequency modulation mode in case that the external unit is turned on or a load of the multi-split air conditioner suddenly changes, further comprising:
under the condition that a wind gear of the indoor unit in the heating mode is shifted down and the frequency reduction operation frequency is smaller than the target frequency, controlling the multi-split air conditioner to enter a frequency modulation mode, wherein the frequency reduction operation frequency is the operation frequency of the multi-split air conditioner after the current operation frequency is reduced by a first preset frequency;
and controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the wind gear of the inner machine is shifted down or shifted up and the operating frequency of the multi-split air conditioner is smaller than the difference value between the target frequency and a second preset frequency.
4. The method of claim 1, wherein the controlling the multi-split air conditioner to enter a frequency modulation mode in case that the external machine is turned on or a load of the multi-split air conditioner suddenly changes, further comprising:
and under the condition that the temperature change rate of the inner machine is greater than a preset rate and the operating frequency of the multi-split air conditioner is less than the difference value between the target frequency and a second preset frequency, controlling the multi-split air conditioner to enter a frequency modulation mode.
5. The method of claim 1, wherein the controlling the multi-split air conditioner to enter a frequency modulation mode in case that the external machine is turned on or a load of the multi-split air conditioner suddenly changes, further comprising:
and controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the multi-split air conditioner exits a protection frequency limiting or reducing state.
6. The method as claimed in any one of claims 1 to 5, wherein controlling the multi-split air conditioner to enter a stable mode comprises:
and controlling the change rate of the operating frequency of the multi-split air conditioner within the preset range.
7. A frequency control device of a multi-split air conditioner, characterized in that the multi-split air conditioner comprises an outer unit and a plurality of inner units, the device comprises:
a first control unit, configured to control the multi-split air conditioner to enter a frequency modulation mode when a load of the multi-split air conditioner suddenly changes, where the frequency modulation mode is a mode in which a frequency change rate of the multi-split air conditioner is controlled within a first predetermined range, and the sudden load change of the multi-split air conditioner includes at least one of: the startup number of the internal machines is changed, the wind gear of the internal machines is changed, the temperature rise rate of the internal machines is greater than a threshold value, and the multi-split air conditioner exits a protection frequency limiting or reducing state;
the calculating unit is used for calculating the target frequency according to current operating parameters and current environment parameters, wherein the operating parameters comprise set temperature, wind gear and capability code of the internal machine, and the environment parameters comprise indoor temperature and outdoor temperature;
the adjusting unit is used for adjusting the operating frequency of the multi-split air conditioner to the target frequency;
the device comprises a frequency modulation mode, a first control unit, a second control unit and a third control unit, wherein the frequency modulation mode is used for modulating the frequency of the multi-split air conditioner, the frequency modulation mode is used for controlling the multi-split air conditioner to enter a stable mode, the stable mode is used for controlling the frequency change rate of the multi-split air conditioner to be within a first preset range, the interval of the second preset range is a sub-interval of the first preset range, the device further comprises the third control unit, the third control unit further comprises an eighth control module and a ninth control module, the eighth control module is used for controlling the multi-split air conditioner to keep the stable mode to operate after controlling the multi-split air conditioner to enter the stable mode and under the condition that the product of a first difference value and a second difference value is greater than 0, the first difference value is the difference value between the operating frequency of the multi-split air conditioner and a first target frequency, the first target frequency is the difference value of the multi-split air conditioner load before sudden change, and the second target frequency is the target frequency of the multi-split air conditioner after sudden change of the load; the ninth control module is used for controlling the multi-split air conditioner to enter a frequency modulation mode under the condition that the product of the first difference value and the second difference value is less than 0.
8. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored program, wherein the program performs the method of any one of claims 1 to 6.
9. A processor, configured to run a program, wherein the program when running performs the method of any one of claims 1 to 6.
10. An air conditioning system comprising a multi-split air conditioner and a frequency control device of the multi-split air conditioner, wherein the frequency control device of the multi-split air conditioner is configured to perform the method of any one of claims 1 to 6.
CN202111315036.5A 2021-11-08 2021-11-08 Frequency control method and device of multi-split air conditioner and air conditioning system Active CN113958997B (en)

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