CN117940718A - Air conditioner and control method thereof - Google Patents

Air conditioner and control method thereof Download PDF

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Publication number
CN117940718A
CN117940718A CN202380013558.0A CN202380013558A CN117940718A CN 117940718 A CN117940718 A CN 117940718A CN 202380013558 A CN202380013558 A CN 202380013558A CN 117940718 A CN117940718 A CN 117940718A
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China
Prior art keywords
temperature
actual
air
standard effective
target
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CN202380013558.0A
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Chinese (zh)
Inventor
王军
陈守海
张素珍
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Hisense Air Conditioning Co Ltd
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Hisense Air Conditioning Co Ltd
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Publication of CN117940718A publication Critical patent/CN117940718A/en
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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
    • 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
    • F24F11/70—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
    • 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
    • F24F2120/00—Control inputs relating to users or occupants
    • F24F2120/10—Occupancy
    • F24F2120/12—Position of occupants
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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

Abstract

Some embodiments of the present disclosure provide an air conditioner and a control method thereof, the air conditioner including an outdoor unit, an indoor unit, a temperature sensor, and a controller. The outdoor unit includes a compressor configured to compress a refrigerant to drive the refrigerant to circulate in the air conditioner. And an indoor unit including an indoor fan configured to supply air to an indoor. The temperature sensor is configured to detect an actual return air temperature and an actual outlet air temperature. A controller configured to: acquiring a currently set standard effective temperature range and a target air supply distance, and detecting an actual return air temperature, an actual air outlet temperature and an actual air speed; calculating an actual standard effective temperature according to the actual return air temperature, the actual air outlet temperature, the actual air speed and the target air supply distance; and if the actual standard effective temperature is determined to be outside the standard effective temperature range, adjusting the running frequency of the compressor and the rotating speed of the indoor fan.

Description

Air conditioner and control method thereof
The present application claims priority from the chinese patent application No. 202210467905.4 filed on 4/29 of 2022, the entire contents of which are incorporated herein by reference.
Technical Field
The present disclosure relates to the field of air conditioning apparatuses, and more particularly, to an air conditioner and a control method thereof.
Background
With the improvement of the human living standard, the air conditioner has entered into thousands of households, offices and public places, and even applied to various vehicles, becomes a necessity of modern daily life, can prevent heatstroke and reduce temperature, and provides a comfortable rest and working environment.
Disclosure of Invention
In one aspect, an air conditioner is provided that includes an outdoor unit, an indoor unit, a temperature sensor, and a controller. The outdoor unit includes a compressor configured to compress a refrigerant to drive the refrigerant to circulate in the air conditioner. The indoor unit includes an indoor fan configured to supply air to an indoor. The temperature sensor is configured to detect an actual return air temperature and an actual outlet air temperature. The controller is configured to: acquiring a currently set standard effective temperature range and a target air supply distance, and detecting an actual return air temperature, an actual air outlet temperature and an actual air speed; calculating an actual standard effective temperature according to the actual return air temperature, the actual air outlet temperature, the actual air speed and the target air supply distance; and if the actual standard effective temperature is determined to be outside the standard effective temperature range, adjusting the operating frequency of the compressor and the rotating speed of the indoor fan.
The calculating the actual standard effective temperature according to the actual return air temperature, the actual air outlet temperature, the actual air speed and the target air supply distance comprises the following steps: acquiring the rotating speed of a currently set indoor fan, and calculating the current farthest air supply distance according to the rotating speed of the indoor fan; calculating target wind temperature and target wind speed according to the actual return air temperature, the actual wind outlet temperature, the actual wind speed, the target air supply distance and the farthest air supply distance; the target wind temperature is the wind temperature of the center of the airflow zone with the distance from the air outlet of the air conditioner being the target air supply distance, and the target wind speed is the wind speed of the center of the airflow zone with the distance from the air outlet of the air conditioner being the target air supply distance; and determining the standard effective temperature corresponding to the target wind temperature and the target wind speed as the actual standard effective temperature according to the corresponding relation between the preset wind temperature, the wind speed and the standard effective temperature.
In another aspect, a control method of an air conditioner is provided, wherein the air conditioner includes an outdoor unit, an indoor unit, a temperature sensor, and a controller. The outdoor unit includes a compressor configured to compress a refrigerant to drive the refrigerant to circulate in the air conditioner. The indoor unit includes an indoor fan configured to supply air to an indoor. The controller is coupled with the compressor and the indoor fan, respectively. The temperature sensor is configured to detect an actual return air temperature and an actual outlet air temperature. The control method comprises the following steps: acquiring a currently set standard effective temperature range and a target air supply distance, and detecting an actual return air temperature, an actual air outlet temperature and an actual air speed; calculating an actual standard effective temperature according to the actual return air temperature, the actual air outlet temperature, the actual air speed and the target air supply distance; and if the actual standard effective temperature is determined to be outside the standard effective temperature range, adjusting the operating frequency of the compressor and the rotating speed of the indoor fan.
Wherein the standard effective temperature range is [ SET s-ΔT,SETs +DeltaT ]. And if the actual standard effective temperature is determined to be outside the standard effective temperature range, adjusting the operating frequency of the compressor and the rotating speed of the indoor fan, including: if the actual standard effective temperature meets SET ρ<SETs -DeltaT, judging the magnitude relation between the temperature difference E and a preset temperature threshold E_s; if the temperature difference E and the temperature threshold E s are determined to meet E < E s, reducing the current running frequency of the compressor according to a preset frequency adjustment step length, and reducing the current rotating speed of the indoor fan according to a preset gear adjustment step length; the temperature difference value is the difference value between the target refrigeration temperature set currently and the actual return air temperature; if the temperature difference E and the temperature threshold E s are determined to meet E s or more, maintaining the current running frequency of the compressor unchanged, and reducing the current rotating speed of the indoor fan according to a preset gear adjusting step; wherein, SET ρ is the actual standard effective temperature, SET s is the SET standard effective temperature, and DeltaT > 0.
Drawings
In order to more clearly illustrate the technical solutions of the present disclosure, the drawings that are required to be used in some embodiments of the present disclosure will be briefly described below, however, the drawings in the following description are only drawings of some embodiments of the present disclosure, and other drawings may be obtained according to these drawings for those of ordinary skill in the art. Furthermore, the drawings in the following description may be regarded as schematic diagrams, not limiting the actual size of the products, the actual flow of the methods, the actual timing of the signals, etc. according to the embodiments of the present disclosure.
Fig. 1 is a block diagram of an air conditioner according to some embodiments;
FIG. 2 is a block diagram of an air conditioner according to some embodiments;
Fig. 3 is a flowchart of a control method of an air conditioner according to some embodiments;
Fig. 4 is a schematic view of an indoor unit of an air conditioner according to some embodiments;
Fig. 5 is another schematic view of an indoor unit of an air conditioner according to some embodiments;
fig. 6 is a flowchart of another control method of an air conditioner according to some embodiments;
fig. 7 is a flowchart of a control method of yet another air conditioner according to some embodiments;
FIG. 8 is a graph of outlet airflow band center distance versus wind speed for an indoor unit according to some embodiments;
FIG. 9 is a graph of air temperature versus supply distance for an air conditioner according to some embodiments;
Fig. 10 is a graph of wind speed versus supply distance for an air conditioner according to some embodiments.
Detailed Description
The following description of the embodiments of the present disclosure will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by one of ordinary skill in the art based on the embodiments provided by the present disclosure are within the scope of the present disclosure.
Throughout the specification and claims, unless the context requires otherwise, the word "comprise" and its other forms such as the third person referring to the singular form "comprise" and the present word "comprising" are to be construed as open, inclusive meaning, i.e. as "comprising, but not limited to. In the description of the specification, the terms "one embodiment", "some embodiments (some embodiments)", "exemplary embodiment (exemplary embodiments)", "example (example)", "specific example (some examples)", etc. are intended to indicate that a particular feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present disclosure, unless otherwise indicated, the meaning of "a plurality" is two or more.
In describing some embodiments, expressions of "coupled" and "connected" and their derivatives may be used. The term "coupled" is to be interpreted broadly, as referring to, for example, a fixed connection, a removable connection, or a combination thereof; can be directly connected or indirectly connected through an intermediate medium. The term "coupled" for example, indicates that two or more elements are in direct physical or electrical contact. The term "coupled" or "communicatively coupled (communicatively coupled)" may also mean that two or more elements are not in direct contact with each other, but yet still co-operate or interact with each other. The embodiments disclosed herein are not necessarily limited to the disclosure herein.
"A and/or B" includes the following three combinations: only a, only B, and combinations of a and B.
The use of "adapted" or "configured to" herein is meant to be an open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.
In addition, the use of "based on" is intended to be open and inclusive in that a process, step, calculation, or other action "based on" one or more of the stated conditions or values may be based on additional conditions or beyond the stated values in practice.
Fig. 1 is a block diagram of an air conditioner according to some embodiments; fig. 2 is a block diagram of an air conditioner according to some embodiments. As shown in fig. 1 and 2, some embodiments of the present disclosure provide an air conditioner 10, the air conditioner 10 including an outdoor unit 20, an indoor unit 30, a temperature sensor 50, an expansion valve 60, and a wind speed sensor 70. The outdoor unit 20 of the air conditioner 10 includes a compressor 21, an outdoor heat exchanger 22, and an outdoor fan 23, and the indoor unit 30 of the air conditioner 10 includes an indoor heat exchanger 31, an indoor fan 32, and an indoor air outlet 33 (i.e., an air outlet of the air conditioner 10). At least one of the outdoor unit 20 and the indoor unit 30 is provided with an expansion valve 60.
The compressor 21, the condenser (the indoor heat exchanger 31 or the outdoor heat exchanger 22), the expansion valve 60, and the evaporator (the outdoor heat exchanger 22 or the indoor heat exchanger 31) perform refrigerant circulation of the air conditioner 10. The refrigerant cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies the refrigerant to the side cycle to be conditioned.
The compressor 21 compresses the gas-phase refrigerant in a low-temperature and low-pressure state, discharges the compressed gas-phase refrigerant of high temperature and high pressure, and flows into the condenser. The condenser condenses the high-temperature high-pressure gas-phase refrigerant into a high-pressure liquid-phase refrigerant, and heat is released to the surrounding environment along with the condensation process. The expansion valve 60 expands the liquid-phase refrigerant in a high-pressure state into a gas-liquid two-phase refrigerant in a low-pressure state. The evaporator absorbs heat from the surrounding environment and evaporates the gas-liquid two-phase refrigerant in a low-pressure state to form a low-temperature low-pressure gas-phase refrigerant, and the low-temperature low-pressure gas-phase refrigerant returns to the compressor 21.
The indoor heat exchanger 31 is configured to liquefy or vaporize a refrigerant by exchanging heat between indoor air and the refrigerant transported in the indoor heat exchanger 31. The outdoor heat exchanger 22 is configured to liquefy or vaporize the refrigerant by exchanging heat between the outdoor air and the refrigerant transported in the outdoor heat exchanger 22. For example, the indoor heat exchanger 31 operates as an evaporator when the air conditioner 10 is operated in the cooling mode, so that the refrigerant radiated through the outdoor heat exchanger 22 is evaporated by absorbing heat of indoor air by the indoor heat exchanger 31. The indoor heat exchanger 31 operates as a condenser in the heating mode of the air conditioner 10 such that the refrigerant having absorbed heat through the outdoor heat exchanger 22 emits heat to indoor air through the indoor heat exchanger 31 to be condensed.
The expansion valve 60 may be an electronic expansion valve connected between the outdoor heat exchanger 22 and the indoor heat exchanger 31. The electronic expansion valve 60 includes an outdoor electronic expansion valve 61 and an indoor electronic expansion valve 62. The opening degree of the electronic expansion valve 60 adjusts the pressure of the refrigerant flowing through the outdoor heat exchanger 22 and the indoor heat exchanger 31 to adjust the flow rate of the refrigerant flowing between the outdoor heat exchanger 22 and the indoor heat exchanger 31. The flow rate and pressure of the refrigerant flowing between the outdoor heat exchanger 22 and the indoor heat exchanger 31 will affect the heat exchanging performance of the outdoor heat exchanger 22 and the indoor heat exchanger 31.
The outdoor fan 23 is configured to promote heat exchange between the refrigerant flowing through the heat transfer pipe of the outdoor heat exchanger 22 and the outdoor air. The indoor fan 32 is configured to promote heat exchange of the refrigerant flowing in the heat transfer pipe of the indoor heat exchanger 31 with indoor air to assist temperature regulation.
In some embodiments of the present disclosure, the air conditioner 10 further includes a controller 40, the controller 40 being coupled with the outdoor unit 20, the indoor unit 30, the temperature sensor 50, the expansion valve 60, and the wind speed sensor 70, the controller 40 being configured to control an operation state of each component coupled with the controller 40. In some embodiments of the present disclosure, the controller 40 may be divided into an indoor controller and an outdoor controller for controlling structural components of the indoor unit 30 and the outdoor unit 20, respectively.
As shown in fig. 2, the temperature sensor 50 includes an outdoor temperature sensor 51 and an indoor temperature sensor 52. The indoor temperature sensor 52 includes an indoor ambient temperature sensor 521, an outlet air temperature sensor 522, and a coil temperature sensor 523. The indoor ambient temperature sensor 521 is configured to detect an actual indoor air temperature, the outlet air temperature sensor 522 is configured to detect an outlet air temperature of the indoor unit, and the coil temperature sensor 523 is configured to detect a temperature at the indoor coil.
The controller 40 may include a central processing unit (central processing unit, CPU), a microprocessor, an Application SPECIFIC INTEGRATED Circuit (ASIC), and may be configured to perform the corresponding operations described in the controller 40 when the processor executes a program stored in a non-transitory computer readable medium coupled to the controller 40.
The air conditioner 10 generally uses the air temperature as a single control target, and adjusts the operation frequency of the compressor 21 to change the cooling capacity and the air outlet temperature of the air conditioner 10, thereby satisfying the indoor air temperature required by the user. However, the magnitude of the air outlet speed of the air conditioner 10 has a greater influence on the uniformity of the indoor air temperature, and the actual feeling of the human body is a result of the coupling of the air temperature and the air speed, and is not a feeling of a single air temperature, for example, the larger the air speed, the lower the body feeling temperature of the human body is at a constant air outlet temperature of the air conditioner 10. Therefore, if only the air temperature is used as a control target, it is difficult to better achieve the uniformity requirement of the overall room temperature, and it is difficult to satisfy the requirement of the user for the comfort temperature of the body feeling.
In the related art, the requirements of users on the comfort temperature of the body feeling are met through controlling three parameters of temperature, wind speed and humidity. However, this control method is complicated, and requires a high level of equipment for the air conditioner 10, and it is difficult for the controller 40 to control the temperature, the wind speed, and the humidity together.
In order to solve the above technical problems, some embodiments of the present disclosure provide a control method of an air conditioner, which is applied to a controller. According to the control method of the air conditioner, which is disclosed by some embodiments, the concept of standard environmental temperature is introduced, and the control of the operation frequency of the compressor 21 is realized by considering two influencing factors of wind speed and wind temperature, so that the adjustment of the operation frequency of the air conditioner 10 is more accurate and effective, the temperature of a user set measuring point or a position where the user is located can reach the temperature required by the user as soon as possible, the complexity is relatively low, and a comfortable environment can be better provided for the user.
Fig. 3 is a flowchart of a control method of an air conditioner according to some embodiments, as shown in fig. 3, which includes steps S11 to S15 in some embodiments of the present disclosure.
And S11, acquiring a currently set standard effective temperature range and a target air supply distance, and detecting an actual return air temperature, an actual air outlet temperature and an actual air speed.
Note that, the definition of the Standard Effective Temperature (SET) is: when a person wearing a standard garment (thermal resistance 0.6 clo) is in an environment with 50% relative humidity, approximately stationary air (wind speed approximately 0.1 m/s), the same air temperature as the average radiation temperature and a metabolic rate of 1met (equivalent to the person being in a stationary sitting position), if the average skin temperature and skin humidity of the person are the same as the thermal resistance conditions of an actual environment and an actual garment, the person will have the same heat dissipation capacity in the standard environment and the actual environment, and the air temperature of the standard environment is the standard effective temperature SET of the environment in which the person is actually located, and it is generally required that all or most of the areas in the whole room can reach the comfortable standard effective temperature SET.
The unit clo is clo and is an adiabatic unit for aeronautical medical measurement. MET (metabolic equivalent of energy) indicates the equivalent energy metabolism, transliterated into prune, which is a common index for expressing the relative energy metabolism level during various activities based on the energy consumption during resting and sitting.
The standard effective temperature SET is calculated from 4 environmental factors (actual return air temperature Ta, relative humidity Rh, wind speed Va, average radiation temperature Tr) and 2 human factors (human metabolism rate M, garment thermal resistance clo), i.e. there is a function or calculation program for set=f (Ta, va, rh, tr, M, clo). Assuming that the average radiation temperature tr=the actual return air temperature Ta, the relative humidity Rh is the humidity detected by the air conditioner 10, and the humidity of the indoor air has been reduced after passing through the evaporator during the cooling operation of the air conditioner 10, the relative humidity Rh of the air blown out by the air conditioner 10 is generally between 40% and 70%, and defaults to 50%. The thermal resistance of the summer clothing is 0.6clo, and the metabolism rate is 1.0M. This simplifies the set=f (Ta, va, rh, tr, M, clo) calculation procedure to a function that solves for the standard effective temperature SET, i.e. set=f (Ta, va), by the actual return air temperature Ta and wind speed Va. Correspondingly, functions of ta=f (SET, va) and va=f (Ta, SET) can also be obtained.
In some embodiments of the present disclosure, a user may SET the current target standard effective temperature SET s according to his own needs and determine the standard effective temperature range according to the target standard effective temperature SET s. The standard effective temperature range is [ SET s-ΔT,SETs +ΔT ]. Wherein Δt is a temperature constant, and Δt >0. The value of Δt can be set according to actual requirements.
In some embodiments of the present disclosure, the value of ΔT ranges from 0.1 ℃ to 5 ℃. For example, when Δt=1 ℃, the target standard effective temperature SET s of the wind blown onto the user is close to 25 ℃, and the standard effective temperature range may be SET to be [24.0 ℃,26.0 ℃).
The user can determine the distance between the user and the air conditioner 10 according to the position of the user or determine the target air supply distance ρ according to the distance between the user work, learning or leisure place (recorded as the user set measuring point) and the air conditioner 10. Fig. 4 is a schematic view of an indoor unit of an air conditioner according to some embodiments, and fig. 5 is another schematic view of an indoor unit of an air conditioner according to some embodiments, as shown in fig. 4 and 5, the temperature at the indoor air outlet 33 is lower, a user typically does not stand at the indoor air outlet 33 for a long time, but is located at a distance of 1m or more from the indoor air outlet 33, so that the user can set the distance of the center of the airflow zone from the indoor air outlet 33 to be, for example, 1.5m, and the target supply air distance ρ is 1.5m. If the user can accept the air temperature at the position with the distance from the user to the indoor air outlet 33 being 1.5m, the air temperature rises and the air speed decreases along with the increase of the distance between the user and the indoor air outlet 33, and the standard effective temperature SET rises, so that the standard effective temperature SET felt by the user increases along with the increase of the distance, and the requirement that the user expects the air conditioner 10 to refrigerate and air out less cool can be met. If the air speed is not considered, the air temperature is controlled in a single dimension, the requirement on the operation frequency of the compressor 21 is low, the output of the refrigerating capacity of the air conditioner 10 is low, the time for indoor reaching the SET target standard effective temperature SET s is prolonged, and even the target standard effective temperature SET s is not reached all the time.
The actual return air temperature Ta is the actual indoor air temperature, and is detected by the indoor environment temperature sensor 521.
The actual outlet air temperature ta_out may be measured by the outlet air temperature sensor 522 installed at the indoor outlet 33, and of course, the actual outlet air temperature ta_out may be calculated by equation 1. Ta_out=k1×te equation 1
Where Te is the indoor coil temperature, measured by a coil temperature sensor 523 provided at the indoor coil, and K1 is the temperature constant, obtained from multiple tests or experience.
The actual wind speed va_out can be measured by the wind speed sensor 70 installed at the indoor air outlet 33, and of course, the actual wind speed va_out can also be calculated by formula 2. Va_out=k2×r formula 2
Where R is the rotational speed of the indoor fan 32 and K2 is the wind speed coefficient.
In step S12, the actual standard effective temperature SET ρ is calculated according to the actual return air temperature Ta, the actual outlet air temperature ta_out, the actual air speed va_out and the target air supply distance ρ.
Step S13, determining whether the actual standard effective temperature SET ρ is outside the standard effective temperature range [ SET s-ΔT,SETs +Δt ], if yes, executing step S14, and if no, executing step S15.
In step S14, the operation frequency F of the compressor 21 and the rotation speed R of the indoor fan 32 are adjusted.
In step S15, the operation frequency F of the compressor 21 and the rotation speed R of the indoor fan 32 are maintained.
Fig. 6 is a flowchart of another control method of an air conditioner according to some embodiments, as shown in fig. 6, in some embodiments of the present disclosure, step S12 includes steps S121 to S123.
Step S121, the rotation speed R of the indoor fan 32 currently set is obtained, and the current farthest air supply distance is calculated based on the rotation speed R.
In some embodiments of the present disclosure, the farthest air supply distance ρ max of the air conditioner 10 is related to the rotation speed R of the indoor fan 32 currently set, and in general, the larger the rotation speed R of the indoor fan 32, the larger the farthest air supply distance ρ max.
For example, fig. 8 is a graph of center distance of an outlet airflow zone of an air conditioner versus wind speed according to some embodiments, wherein the correspondence of the rotational speed R of the indoor fan 32, the supply air distance, and the wind speed Va is shown in table 1.
Table 1 correspondence relationship between rotational speed, air supply distance, and wind speed of indoor fan
In table 1, the first row represents the distance between the center of the airflow band and the indoor air outlet 33, i.e. the air supply distance, in m; the first column on the left is the rotational speed R of the indoor fan 32, which can be characterized by the gear of the indoor fan 32; the values in the table are the wind speeds Va in m/s for the central zone of the flow.
According to table 1, the rotation speed R of the indoor fan 32 and the farthest air supply distance ρ max are linearly fitted as a linear function, for example, as formula 3, and the current farthest air supply distance ρ max.ρmax =k3×r+k4 is calculated from the rotation speed R of the indoor fan 32 by formula 3
Wherein K3 and K4 are respectively preset distance constants, for example: k3 =0.0033, k4=1.3.
The user adjusts the gear of the indoor fan 32 according to the own requirement to adjust the rotation speed R of the indoor fan 32, and then adjusts the wind speed when the air outlet of the air conditioner 10 blows to the user. The larger the gear of the indoor fan 32, the larger the rotational speed R of the corresponding indoor fan 32. The level of the gear of the indoor fan 32 and the rotation speed R range of the indoor fan 32 corresponding to each level may be set according to actual conditions, which is not limited in the present disclosure.
In step S122, the target wind temperature and the target wind speed are calculated according to the actual return air temperature Ta, the actual outlet air temperature ta_out, the actual wind speed va_out, the target air supply distance ρ and the farthest air supply distance ρ max.
The target air temperature Ta ρ is the air temperature at the center of the air flow zone where the distance from the indoor air outlet 33 is the target air supply distance ρ, and the target air speed Va ρ is the air speed at the center of the air flow zone where the distance from the indoor air outlet 33 is the target air supply distance ρ.
Fig. 9 is a graph of air temperature and supply distance of an air conditioner according to some embodiments, and fig. 10 is a graph of air speed and supply distance of an air conditioner according to some embodiments, as shown in fig. 9 and 10, when the rotation speed R of the indoor fan 32 is determined, the target air temperature Ta ρ at different target supply distances ρ may be linearly fitted to the target supply distance ρ as a linear function, for example, when ρ=0, ta 0 =ta_out; when ρ=ρ max, ta ρmax =ta.
According to different target air supply distances ρ, the target air temperature Ta ρ at the center of the air flow zone with the target air supply distance ρ from the indoor air outlet 33 is calculated by equation 4 in combination with the actual return air temperature Ta, the actual air outlet temperature ta_out, and the farthest air supply distance ρ max.
For example, as shown in fig. 9, when the target air blowing distance ρ=1.5 m, the target air temperature is set
As can be seen from table 1 and fig. 10, when the rotation speed R of the indoor fan 32 is determined, the target wind speed Va ρ at the different target blowing distances ρ and the target blowing distance ρ may be linearly fitted as a linear function, for example, when ρ=0, va 0 =va_out; va ρmax =0 when ρ=ρ max.
According to different target air supply distances ρ, the target air speed Va ρ of the center of the air flow band with the distance from the indoor air outlet 33 being the target air supply distance ρ is calculated by the formula 5 in combination with the actual return air temperature Ta, the actual air speed va_out and the farthest air supply distance ρ max.
For example, as shown in fig. 10, when the target blowing distance ρ=1.5 m, the target wind speed is the target wind speed
In step S123, the standard effective temperature SET corresponding to the target wind temperature Ta ρ and the target wind speed Va ρ is determined as the actual standard effective temperature SET ρ according to the preset correspondence between the wind temperature, the wind speed and the standard effective temperature.
In some embodiments of the present disclosure, in the preset correspondence between the wind temperature, the wind speed and the standard effective temperature, the standard effective temperature SET and the wind temperature are in positive correlation, and the standard effective temperature SET and the wind speed are in negative correlation.
In some embodiments of the present disclosure, the correspondence between wind temperature, wind speed, and standard effective temperature is preset, for example, as shown in table 2.
TABLE 2 correspondence between wind temperature, wind speed and Standard effective temperature
Table 2 is a table of wind temperature-wind speed-standard effective temperature relationship decoupled by a function of set=f (Ta, va). The first row in Table 2 represents the wind speed Va of the center zone of the air flow in m/s; the first column on the left side is the wind temperature in degrees celsius; the values in the table are the standard effective temperature SET in c.
It should be noted that, the wind speed may be the actual wind speed va_out, the target wind speed Va ρ, etc.; the air temperature can be the actual return air temperature Ta, the target air temperature Ta ρ, the actual air outlet temperature Ta_out and the like; the standard effective temperature may be an actual standard effective temperature SET ρ, a target standard effective temperature SET s, or the like.
The minimum division of the standard effective temperature SET and the actual return air temperature Ta is determined by the accuracy of the indoor ambient temperature sensor 521 of the air conditioner 10. For example, when the accuracy of the indoor ambient temperature sensor 521 is 0.5 ℃, the minimum division of the standard effective temperature SET, the actual return air temperature Ta, is 0.5 ℃; when the accuracy of the indoor ambient temperature sensor 521 is 0.1 ℃, the minimum division of the standard effective temperature SET, the actual return air temperature Ta, is 0.1 ℃.
After the target air temperature Ta ρ and the target air speed Va ρ at the target air supply distance ρ are obtained, the actual standard effective temperature SET ρ at the target air supply distance ρ is obtained according to table 2. For example, when the target air temperature Ta ρ at the center of the air flow zone with a distance of 1.5m from the indoor air outlet 33 is calculated to be 21 ℃ and the target air speed Va ρ is calculated to be 0.4m/s, the actual standard effective temperature SET ρ =18.5 ℃ can be obtained according to table 2.
In some embodiments of the present disclosure, when the air conditioner 10 is operated in the cooling mode, the rotational speed R of the indoor fan 32 is related to a temperature difference E between the target cooling temperature Ts set by the user and the current actual return air temperature Ta, and the greater the temperature difference E, the greater the rotational speed R of the indoor fan 32. For example, the target cooling temperature Ts is set by the user as desired, with the temperature difference e=ta-Ts.
It should be noted that, the operation frequency F of the compressor 21 has an important influence on whether the indoor air temperature reaches the target standard effective temperature SET s, and the wind speed has an important influence on the uniformity of the indoor air temperature, and the larger the wind speed is, the more beneficial the indoor air circulation is promoted, and the better the uniformity of the indoor overall temperature is. The operation frequency F and the wind speed of the compressor 21 have a great influence on the air outlet temperature of the air conditioner 10, and the operation frequency F of the compressor 21 has a greater influence on the air outlet temperature of the air conditioner 10 than the wind speed has on the air outlet temperature of the air conditioner 10. According to the control method of the air conditioner in some embodiments of the present disclosure, through the combination of the standard effective temperature SET and the temperature difference E, and in combination with the influence of the wind speed on the uniformity of the indoor air temperature, the requirement that the SET measuring point at the target supply distance ρ reaches the target standard effective temperature SET s is achieved by dynamically adjusting the rotation speed R of the indoor fan 32 and the running frequency F of the compressor 21 under the condition that the indoor air temperature reaches the target standard effective temperature SET s as far as possible and the uniformity of the indoor air temperature is good.
Fig. 7 is a flowchart of a control method of yet another air conditioner according to some embodiments, as shown in fig. 7, in some embodiments of the present disclosure, step S14 includes steps S141 to S1432.
Step S141, judging whether the actual standard effective temperature SET ρ meets SET ρ<SETs -DeltaT, if yes, executing step S142, otherwise, executing step S143.
Step S142, judging whether the temperature difference value meets E not less than E s, if yes, executing step S1421, and if no, executing step S1422.
In some embodiments of the present disclosure, E s is a preset temperature threshold.
In step S1421, the operating frequency F of the compressor 21 is maintained, and the rotational speed R of the indoor fan 32 is reduced according to the preset gear step.
The controller 40 controls the rotation speed R of the indoor fan 32 to decrease by Δr and controls the operation frequency F of the compressor 21 to be unchanged. In some embodiments of the present disclosure, the gear step of the indoor fan 32 is ΔR, and the reduced rotational speed of the indoor fan 32 is, for example, R- ΔR.
In step S1422, the operating frequency F of the compressor 21 is reduced according to the preset frequency adjustment step, and the rotational speed R of the indoor fan 32 is reduced according to the preset gear adjustment step.
At this time, the temperature difference E satisfies E < E s, and the controller 40 controls the rotation speed R of the indoor fan 32 to decrease Δr and controls the operation frequency of the compressor 21 to decrease Δf. In some embodiments of the present disclosure, the frequency adjustment step size of the compressor 21 is ΔF, and the reduced operating frequency of the compressor 21 is, for example, F- ΔF. The delta F range is 0.1 Hz-20 Hz.
Step S143, judging whether the temperature difference value meets E not less than E s, if yes, executing step S1431, and if no, executing step S1432.
In step S1431, the operation frequency F of the compressor 21 is increased according to the preset frequency adjustment step, and the rotation speed R of the indoor fan 32 is increased according to the preset gear adjustment step.
The controller 40 controls the rotation speed R of the indoor fan 32 to increase by Δr and controls the operation frequency of the compressor 21 to increase by Δf. In some embodiments of the present disclosure, the rotational speed of the increased indoor fan 32 is, for example, r+Δr, and the operating frequency of the increased compressor 21 is, for example, f+Δf.
In step S1432, the operation frequency F of the compressor 21 is maintained, and the rotation speed R of the indoor fan 32 is increased according to the preset gear adjustment step.
At this time, the temperature difference E satisfies E < E s, and the controller 40 controls the rotation speed of the indoor fan 32 to increase Δr and controls the operation frequency F of the compressor 21 to be unchanged.
In some embodiments of the present disclosure, as shown in fig. 7, when the air conditioner 10 is operated in the cooling mode, a user sets parameters such as a target cooling temperature Ts, a rotation speed R of the indoor fan 32, a target supply air distance ρ, and the like according to the need. After a user starts the function of the air outlet standard effective temperature SET, the target standard effective temperature SET s is SET according to the self requirement, so that the standard effective temperature range [ SET s-ΔT,SETs +delta T ] is obtained. The controller 40 detects the actual air outlet temperature ta_out, the actual air speed va_out and the actual return air temperature Ta, calculates a temperature difference E according to the target refrigeration temperature Ts and the actual return air temperature Ta, and calculates the farthest air supply distance ρ max according to the current rotation speed R of the indoor fan 32 by substituting into formula 3. The actual return air temperature Ta, the actual outlet air temperature ta_out, the actual air speed va_out and the farthest air supply distance ρ max are substituted into the formulas 4 and 5, respectively, the target air temperature Ta ρ and the target air speed Va ρ of the center of the air flow band with the target air supply distance ρ from the indoor air outlet 33 are calculated, and the actual standard effective temperature SET ρ of the center of the air flow band with the target air supply distance ρ from the indoor air outlet 33 is obtained according to the table 2. The actual standard effective temperature SET ρ is compared to the standard effective temperature range [ SET s-ΔT,SETs + at ].
When SET ρ＞SETs +DeltaT, if the temperature difference E is larger than or equal to E s, the controller 40 controls the rotation speed R of the indoor fan 32 to increase DeltaR, and controls the operation frequency F of the compressor 21 to increase DeltaF; if the temperature difference E < E s, the controller 40 controls the rotation speed R of the indoor fan 32 to increase by Δr and controls the operation frequency F of the compressor 21 to remain unchanged.
When SET ρ＜SETs -DeltaT, if the temperature difference E is larger than or equal to E s, the controller 40 controls the rotating speed R of the indoor fan 32 to be reduced by DeltaR, and controls the running frequency F of the compressor 21 to be unchanged; if the temperature difference E < E s, the controller 40 controls the rotation speed R of the indoor fan 32 to decrease Δr, and simultaneously controls the operation frequency F of the compressor 21 to decrease Δf.
When SET s-ΔT≤SETρ≤SETs +Δt, the controller 40 controls the rotational speed R of the indoor fan 32 and the operating frequency F of the compressor 21 to remain unchanged.
In some embodiments of the present disclosure, the controller 40 calculates the actual standard effective temperature SET ρ at any time, and adjusts the operating frequency F of the compressor 21 or maintains the operating frequency F of the compressor 21 unchanged according to the relationship between the actual standard effective temperature SET ρ and the standard effective temperature range [ SET s-ΔT,SETs +Δt ] and the relationship between the temperature difference E and the target temperature difference E s, and the control method of the air conditioner 10 further includes step S16.
Step S16, repeating the steps S11 to S15 after delaying for T1 seconds.
After the delay T1 second, the controller 40 re-acquires the actual return air temperature Ta, the actual outlet air temperature ta_out, the actual wind speed va_out and the temperature difference E, calculates a new actual standard effective temperature SET ρ, controls the operating frequency F of the compressor 21 and the rotational speed R of the indoor fan 32, and controls the actual standard effective temperature SET ρ within the standard effective temperature range [ SET s-ΔT,SETs +Δt ]. The process is repeated for a subsequent detection period of T1 seconds.
T1 is, for example, 10 to 600.
For example, a certain 1.5-piece model parameter is set as: Δt=1 ℃, E s =1.5 ℃, t1=60 s, Δf=5 Hz, Δr=100 rpm, k3=0.0033, k4=1.3.
When the air conditioner 10 is operated in the cooling mode, a user turns on the air outlet standard effective temperature SET control function, and SETs the target standard effective temperature SET s to 16 ℃, and the standard effective temperature range is 15 ℃ and 17 ℃. The target cooling temperature Ts is set to 26 ℃, the target air supply distance ρ is 1.5m, the controller 40 detects the actual air outlet temperature ta_out=12 ℃, the actual air speed va_out=3 m/s, and the actual return air temperature ta=27 ℃, at which time the temperature difference e=ta-ts=27-26=1 ℃, the gear 4 of the indoor fan 32, and the rotational speed R of the indoor fan 32 is 1050rpm. The farthest air blowing distance ρ max =k3×r+k4=0.0033×1050+1.3≡4.8m is calculated by the formula 3. Substituting ta=27 ℃, ta_out=12 ℃, va_out=3 m/s, ρ max =4.8m into equations 4 and 5, respectively, calculating the target air temperature Ta1.5＝1.5(Ta-Ta_out)/ρmax+Ta_out＝1.5×(27-12)/4.8+12≈16.8℃、Va1.5＝-1.5Va_out/ρmax+Va_out＝-1.5×3/4.8+3≈2.0m/s. of the center of the air flow band with a distance of 1.5m from the indoor air outlet 33, and according to the actual standard effective temperature SET 1.5 ≡10 ℃ < 15 ℃ at the time of table 2, at the time e=27-26=1 ℃, E < E s, controlling the rotation speed R of the indoor fan 32 to be reduced by 100rpm, and the operation frequency F of the compressor 21 to be reduced by 5Hz.
After a period T1, the controller 40 re-detects the actual air outlet temperature ta_out=15 ℃, the actual air speed va_out=2.7 m/s, the actual return air temperature ta=26.5 ℃, the temperature difference e=26.5-26=0.5 ℃, and the rotation speed R is 950rpm. ρ max ≡4.4m is calculated according to equation 3. The target air temperature Ta 1.5 ≡19 ℃ and the target air speed Va 1.5 ≡1.8m/s at the center of the air flow zone at a distance of 1.5m from the indoor air outlet 33 are calculated by substituting ta=26.5 ℃, ta_out=15 ℃, va_out=2.7 m/s and ρ max =4.4 m into the formula 4 and the formula 5, respectively. The actual standard effective temperature SET 1.5 c at this point is obtained according to table 2 and is approximately 13 c < 15 c, where e=26.5-26=0.5 c, E < E s, and the controller 40 controls the rotational speed R to decrease by 100rpm and the operating frequency F of the compressor 21 to decrease by 5Hz.
After a preset period, the controller 40 detects that the actual air outlet temperature ta_out=18 ℃, the actual air speed va_out=2.0 m/s, the return air temperature ta=26 ℃, the temperature difference e=26-26=0 ℃, and the rotating speed R is 750rpm. ρ max ≡3.8m is calculated according to equation 3. The target air temperature Ta 1.5 ≡21.2 ℃ and the target air speed Va 1.5 ≡1.4m/s at the center of the air flow zone at a distance of 1.5m from the indoor air outlet 33 are calculated by substituting ta=26 ℃, ta_out=18 ℃, va_out=2.2 m/s and ρ max =3.8 m into the formulas 4 and 5, respectively. According to table 2, the actual standard effective temperature SET 1.5 ∈16.5 ℃ e [15,17] of the center of the air flow zone with the distance of 1.5m from the indoor air outlet 33 is obtained, the requirement that the target standard effective temperature SET s =16 ℃ SET by the user is met, and at this time, the rotation speed R of the indoor fan 32 and the running frequency F of the compressor 21 are controlled by the controller 40 to be kept unchanged.
Some embodiments of the present disclosure provide an air conditioner, which obtains a currently set standard effective temperature range and a target air supply distance, and detects an actual return air temperature, an actual outlet air temperature and an actual wind speed; calculating an actual standard effective temperature SET ρ according to the actual return air temperature, the actual air outlet temperature, the actual air speed and the target air supply distance; when the actual standard effective temperature SET ρ is outside the standard effective temperature range, adjusting the operating frequency F of the compressor 21 and the rotational speed R of the indoor fan 32; otherwise, the operation frequency F of the compressor and the rotation speed R of the indoor fan 32 are maintained unchanged.
According to the control method of the air conditioner, the concept of the standard ambient temperature SET is introduced, and the control of the operation frequency F of the compressor 21 and the rotating speed R of the indoor fan 32 is realized by considering two influencing factors of the wind speed and the wind temperature, so that the adjustment of the operation frequency F of the air conditioner 10 is more accurate and effective, and the complexity of the control method is relatively low. On the basis of ensuring that the target standard effective temperature SET s required by a user is achieved and reducing uncomfortable feeling of the air conditioner 10 when the air is blown to a human body, the comfort interval can be effectively considered, and the condition that the whole indoor air temperature cannot reach the SET standard effective temperature SET or the time for reaching the SET standard effective temperature SET is prolonged is avoided. According to the method and the device, the actual standard effective temperature SET ρ of the user SET measuring point is calculated through the information of the target air supply distance rho, the indoor fan gear and the like SET by the user, so that the operation parameters of the air conditioner 10 are adjusted, the standard effective temperature SET of the user SET measuring point can reach the target standard effective temperature SET s required by the user as soon as possible, and a comfortable air conditioning environment is better provided for the user.
It should be noted that, in some embodiments of the present disclosure, all the steps of the flow executed by the control method of the air conditioner are the same, and have similar technical effects, which are not described herein again.
It will be appreciated by those skilled in the art that implementing all or part of the above-described embodiment method steps may be implemented by a computer program for instructing relevant hardware, the computer program may be stored in a computer readable storage medium, and the program may include the above-described embodiment method steps when executed. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), or a random access Memory (Random Access Memory, RAM), etc.
It will be understood by those skilled in the art that the scope of the present disclosure is not limited to the specific embodiments described above, and that certain elements of the embodiments may be modified and substituted without departing from the spirit of the application. The scope of the application is limited by the appended claims.

Claims (14)

  1. An air conditioner, comprising:
    an outdoor unit including a compressor configured to compress a refrigerant to drive the refrigerant to circulate in the air conditioner;
    an indoor unit including an indoor fan configured to supply air to an indoor;
    A temperature sensor configured to detect an actual return air temperature and an actual outlet air temperature;
    a controller configured to:
    Acquiring a currently set standard effective temperature range and a target air supply distance, and detecting an actual return air temperature, an actual air outlet temperature and an actual air speed;
    Calculating an actual standard effective temperature according to the actual return air temperature, the actual air outlet temperature, the actual air speed and the target air supply distance;
    if the actual standard effective temperature is determined to be outside the standard effective temperature range, adjusting the running frequency of the compressor and the rotating speed of the indoor fan;
    The calculating the actual standard effective temperature according to the actual return air temperature, the actual air outlet temperature, the actual air speed and the target air supply distance comprises the following steps:
    acquiring the rotating speed of the indoor fan which is currently set, and calculating the current farthest air supply distance according to the rotating speed of the indoor fan;
    Calculating target wind temperature and target wind speed according to the actual return air temperature, the actual wind outlet temperature, the actual wind speed, the target air supply distance and the farthest air supply distance; the target wind temperature is the wind temperature of the center of the airflow zone with the distance from the air outlet of the air conditioner being the target air supply distance, and the target wind speed is the wind speed of the center of the airflow zone with the distance from the air outlet of the air conditioner being the target air supply distance;
    and determining the standard effective temperature corresponding to the target wind temperature and the target wind speed as the actual standard effective temperature according to the corresponding relation between the preset wind temperature, the wind speed and the standard effective temperature.
  2. The air conditioner according to claim 1, wherein,
    In the corresponding relation between the preset wind temperature, wind speed and standard effective temperature, the standard effective temperature and the wind temperature are in positive correlation, and the standard effective temperature and the wind speed are in negative correlation.
  3. The air conditioner according to claim 1 or 2, wherein the calculating a target wind temperature and a target wind speed from the actual return air temperature, the actual outlet air temperature, the actual wind speed, the target supply air distance, and the farthest supply air distance includes:
    calculating the target air temperature according to the actual return air temperature, the actual air outlet temperature, the target air supply distance and the farthest air supply distance;
    And calculating the target wind speed according to the actual wind speed, the target air supply distance and the farthest air supply distance.
  4. An air conditioner according to any one of claims 1 to 3, wherein the standard effective temperature range is [ SET s-ΔT,SETs +Δt ];
    and if the actual standard effective temperature is determined to be outside the standard effective temperature range, adjusting the operating frequency of the compressor and the rotating speed of the indoor fan, including:
    If the actual standard effective temperature meets SET ρ<SETs -DeltaT, judging the magnitude relation between the temperature difference E and a preset temperature threshold E s;
    If the temperature difference E and the temperature threshold E s are determined to meet E < E s, reducing the current running frequency of the compressor according to a preset frequency adjustment step length, and reducing the current rotating speed of the indoor fan according to a preset gear adjustment step length; the temperature difference value is the difference value between the target refrigeration temperature set currently and the actual return air temperature;
    If the temperature difference E and the temperature threshold E s are determined to meet E s or more, maintaining the current running frequency of the compressor unchanged, and reducing the current rotating speed of the indoor fan according to a preset gear adjusting step;
    wherein, SET ρ is the actual standard effective temperature, SET s is the SET standard effective temperature, and DeltaT > 0.
  5. The air conditioner as claimed in claim 4, wherein the adjusting the operating frequency of the compressor and the rotational speed of the indoor fan if it is determined that the actual standard effective temperature is outside the standard effective temperature range, further comprises:
    If the actual standard effective temperature meets SET ρ＞SETs +delta T, judging the magnitude relation between the temperature difference E and the temperature threshold E s;
    If the temperature difference E and the temperature threshold E s are determined to meet E.gtoreq.E s, increasing the current running frequency of the compressor according to a preset frequency adjustment step length, and increasing the current rotating speed of the indoor fan according to a preset gear adjustment step length;
    if the temperature difference E and the temperature threshold E s are determined to be smaller than E s, maintaining the current running frequency of the compressor unchanged, and increasing the current rotating speed of the indoor fan according to a preset gear adjusting step.
  6. The air conditioner according to any one of claims 1 to 5, wherein,
    And if the actual standard effective temperature is determined to be within the standard effective temperature range, maintaining the operating frequency of the compressor and the rotating speed of the indoor fan unchanged.
  7. The air conditioner according to claim 6, wherein,
    The standard effective temperature range is [ SET s-ΔT,SETs +DeltaT ];
    If the actual standard effective temperature is determined to be in the temperature interval [ SET s-ΔT,SETs +DeltaT ], maintaining the current running frequency of the compressor and the current rotating speed of the indoor fan unchanged;
    Wherein, SET s is the SET standard effective temperature, deltaT > 0.
  8. A control method of an air conditioner, wherein,
    The air conditioner includes:
    an outdoor unit including a compressor configured to compress a refrigerant to drive the refrigerant to circulate in the air conditioner;
    an indoor unit including an indoor fan configured to supply air to an indoor;
    A temperature sensor configured to detect an actual return air temperature and an actual outlet air temperature;
    a controller coupled to the compressor and the indoor fan, respectively;
    The control method comprises the following steps:
    Acquiring a currently set standard effective temperature range and a target air supply distance, and detecting an actual return air temperature, an actual air outlet temperature and an actual air speed;
    Calculating an actual standard effective temperature according to the actual return air temperature, the actual air outlet temperature, the actual air speed and the target air supply distance;
    if the actual standard effective temperature is determined to be outside the standard effective temperature range, adjusting the running frequency of the compressor and the rotating speed of the indoor fan;
    Wherein the standard effective temperature range is [ SET s-ΔT,SETs +DeltaT ];
    and if the actual standard effective temperature is determined to be outside the standard effective temperature range, adjusting the operating frequency of the compressor and the rotating speed of the indoor fan, including:
    If the actual standard effective temperature meets SET ρ<SETs -DeltaT, judging the magnitude relation between the temperature difference E and a preset temperature threshold E_s;
    If the temperature difference E and the temperature threshold E s are determined to meet E < E s, reducing the current running frequency of the compressor according to a preset frequency adjustment step length, and reducing the current rotating speed of the indoor fan according to a preset gear adjustment step length; the temperature difference value is the difference value between the target refrigeration temperature set currently and the actual return air temperature;
    If the temperature difference E and the temperature threshold E s are determined to meet E s or more, maintaining the current running frequency of the compressor unchanged, and reducing the current rotating speed of the indoor fan according to a preset gear adjusting step;
    wherein, SET ρ is the actual standard effective temperature, SET s is the SET standard effective temperature, and DeltaT > 0.
  9. The control method of claim 8, wherein the calculating an actual standard effective temperature based on the actual return air temperature, the actual outlet air temperature, the actual wind speed, and the target supply air distance comprises:
    Acquiring the rotating speed of a currently set indoor fan, and calculating the current farthest air supply distance according to the rotating speed of the indoor fan;
    Calculating target wind temperature and target wind speed according to the actual return air temperature, the actual wind outlet temperature, the actual wind speed, the target air supply distance and the farthest air supply distance; the target wind temperature is the wind temperature of the center of the airflow zone with the distance from the air outlet of the air conditioner being the target air supply distance, and the target wind speed is the wind speed of the center of the airflow zone with the distance from the air outlet of the air conditioner being the target air supply distance;
    and determining the standard effective temperature corresponding to the target wind temperature and the target wind speed as the actual standard effective temperature according to the corresponding relation between the preset wind temperature, the wind speed and the standard effective temperature.
  10. The control method according to claim 9, wherein,
    In the corresponding relation between the preset wind temperature, wind speed and standard effective temperature, the standard effective temperature and the wind temperature are in positive correlation, and the standard effective temperature and the wind speed are in negative correlation.
  11. The control method according to claim 9 or 10, wherein the calculating a target wind temperature and a target wind speed from the actual return air temperature, the actual outlet air temperature, the actual wind speed, the target supply air distance, and the farthest supply air distance includes:
    calculating the target air temperature according to the actual return air temperature, the actual air outlet temperature, the target air supply distance and the farthest air supply distance;
    And calculating the target wind speed according to the actual wind speed, the target air supply distance and the farthest air supply distance.
  12. The control method of claim 8, wherein the adjusting the operating frequency of the compressor and the rotational speed of the indoor fan if it is determined that the actual standard effective temperature is outside the standard effective temperature range, further comprises:
    If the actual standard effective temperature meets SET ρ＞SETs +delta T, judging the magnitude relation between the temperature difference E and the temperature threshold E s;
    If the temperature difference E and the temperature threshold E s are determined to meet E.gtoreq.E s, increasing the current running frequency of the compressor according to a preset frequency adjustment step length, and increasing the current rotating speed of the indoor fan according to a preset gear adjustment step length;
    if the temperature difference E and the temperature threshold E s are determined to be smaller than E s, maintaining the current running frequency of the compressor unchanged, and increasing the current rotating speed of the indoor fan according to a preset gear adjusting step.
  13. The control method according to any one of claims 8 to 12, wherein,
    And if the actual standard effective temperature is determined to be within the standard effective temperature range, maintaining the operating frequency of the compressor and the rotating speed of the indoor fan unchanged.
  14. The control method according to claim 13, wherein,
    The standard effective temperature range is [ SET s-ΔT,SETs +DeltaT ];
    If the actual standard effective temperature is determined to be in the temperature interval [ SET s-ΔT,SETs +DeltaT ], maintaining the current running frequency of the compressor and the current rotating speed of the indoor fan unchanged;
    Wherein, SET s is the SET standard effective temperature, deltaT > 0.
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CN114719427B (en) * 2022-04-29 2023-08-29 海信空调有限公司 Air conditioner and frequency control method thereof
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