CN117940715A

CN117940715A - Air conditioner and frequency control method thereof

Info

Publication number: CN117940715A
Application number: CN202380013566.5A
Authority: CN
Inventors: 王军; 张素珍; 陈守海; 陈胜华
Original assignee: Hisense Air Conditioning Co Ltd
Current assignee: Hisense Air Conditioning Co Ltd
Priority date: 2022-04-29
Filing date: 2023-03-09
Publication date: 2024-04-26
Also published as: WO2023207353A1

Abstract

An air conditioner (10), comprising: an outdoor unit (20), an indoor unit (30), and a controller (40). The outdoor unit (20) includes a compressor (21), and the compressor (21) is configured to compress a refrigerant to drive the refrigerant to circulate in the air conditioner (10). The indoor unit (30) includes an indoor fan (32), and the indoor fan (32) is configured to supply air into the room. The controller (40) is configured to: acquiring a currently set standard effective temperature and preset parameters, and detecting an actual return air temperature and an actual air outlet temperature; calculating a target wind temperature according to the set standard effective temperature and preset parameters; calculating a target air outlet temperature according to the target air temperature and the actual return air temperature to obtain a target air outlet temperature range; if the actual outlet air temperature is determined to be outside the target outlet air temperature range, the frequency of the compressor (21) is adjusted.

Description

Air conditioner and frequency control method thereof

The application claims priority from China patent application with application number 202210467923.2 filed on 4/29 of 2022; the priority of the chinese patent application filed at 29 of 2022, 4, and application number 202210466330.4 is incorporated herein by reference in its entirety.

Technical Field

The present disclosure relates to the field of air conditioning apparatuses, and more particularly, to an air conditioner and a frequency 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, there is provided an air conditioner including: an outdoor unit, an indoor unit 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 configured to: acquiring a currently set standard effective temperature and preset parameters, and detecting an actual return air temperature and an actual air outlet temperature; calculating a target wind temperature according to the set standard effective temperature and preset parameters; calculating a target air outlet temperature according to the target air temperature and the actual return air temperature to obtain a target air outlet temperature range; and if the actual air outlet temperature is determined to be outside the target air outlet temperature range, adjusting the frequency of the compressor.

In another aspect, a frequency control method of an air conditioner is provided, wherein the air conditioner includes an outdoor unit, an indoor unit, 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 control method comprises the following steps: the controller acquires the currently set standard effective temperature and preset parameters, and detects the actual return air temperature and the actual air outlet temperature; according to the set standard effective temperature and preset parameters, the controller calculates a target wind temperature; according to the target air temperature and the actual return air temperature, the controller calculates a target air outlet temperature to obtain a target air outlet temperature range; and if the controller determines that the actual air outlet temperature is out of the target air outlet temperature range, adjusting the frequency of the compressor.

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 flowchart of another control method of an air conditioner according to some embodiments;

Fig. 5 is a schematic view of an indoor unit of an air conditioner according to some embodiments;

Fig. 6 is another schematic view of an indoor unit 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 flowchart of a control method of yet another air conditioner according to some embodiments;

fig. 9 is a flowchart of a control method of yet another air conditioner according to some embodiments;

FIG. 10 is a graph of outlet airflow band center distance versus wind speed for an indoor unit according to some embodiments;

FIG. 11 is a flowchart of setting an indoor fan gear according to some embodiments;

Fig. 12 is a flowchart of a control method of yet another air conditioner according to some embodiments;

Fig. 13 is a flowchart of a control method of yet another 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, and 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, and an expansion valve 60. The outdoor unit 20 includes a compressor 21, an outdoor heat exchanger 22, an outdoor fan 23, and an outdoor fan motor 24, and the indoor unit 30 includes an indoor heat exchanger 31, an indoor fan 32, an indoor fan motor 33, and an indoor air outlet 34. The expansion valve 60 is provided in at least one of the outdoor unit 20 or the indoor unit 30.

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 transferred 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 transferred 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 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 in the heat transfer pipe of the outdoor heat exchanger 22 and the outdoor air, and the outdoor fan motor 24 is used to power the outdoor fan 23 to drive the outdoor fan 23 to rotate. The indoor fan 32 is configured to promote heat exchange between the refrigerant flowing in the heat transfer pipe of the indoor heat exchanger 31 and the indoor air to assist temperature adjustment, and the indoor fan motor 33 is used to power the indoor fan 32 to drive the indoor fan 32 to rotate.

The temperature sensor 50 includes an outdoor temperature sensor 51 and an indoor temperature sensor 52. The outdoor temperature sensor 51 is configured to detect an outdoor air temperature. 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 being configured to detect an indoor air temperature, the outlet air temperature sensor 522 being configured to detect an outlet air temperature at the indoor air outlet 34, and the coil temperature sensor 523 being configured to detect a temperature at a coil of the indoor unit 30.

In some embodiments of the present disclosure, the air conditioner 10 further includes a controller 40, the controller 40 being coupled to the outdoor unit 20, the indoor unit 30, the expansion valve 60, and the temperature sensor 50, the controller 40 being configured to control an operation state of each component coupled to the controller 40. In some embodiments of the present disclosure, the controller 40 may include an indoor controller and an outdoor controller for controlling structural components of the indoor unit 30 and the outdoor unit 20, respectively.

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 non-transitory computer readable storage medium may include a magnetic storage device (e.g., hard disk, floppy disk, or magnetic tape), a smart card, or a flash memory device (e.g., an erasable programmable read-only memory (EPROM)), a card, a stick, or a keyboard drive.

The air conditioner 10 controls the operation parameters of the compressor 21, typically with the supply air temperature as a control target. However, when the wind speed of the air conditioner 10 is constant, the lower the wind temperature blown onto the user's body, the cooler the human body feel. When the wind temperature blown onto the user is constant, the human body feels cooler as the wind speed is higher. This is because the actual feeling of the human body is a result of the coupling of the wind temperature and the wind speed, and is not a feeling of a single wind temperature, and if only the wind temperature is used as a control target, it is difficult to satisfy the user's demand for a comfortable temperature.

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, disclosed by some embodiments, the concept of the standard environment temperature SET is introduced, and the control of the operation frequency of the compressor 21 is realized by considering two influencing factors of the wind speed Va and the wind temperature at the same time, so that a comfortable environment is better provided for users.

Fig. 3 is a flowchart of a control method of an air conditioner according to some embodiments, as shown in fig. 3, including steps S11 to S16.

And S11, acquiring the currently set standard effective temperature and preset parameters, and detecting the actual return air temperature and the actual air outlet temperature.

In some embodiments of the present disclosure, the preset parameter includes wind speed Va.

Note that, the definition of the Standard Effective Temperature (SET) is: the human body wearing standard clothes (the thermal resistance of the clothes is 0.6 clo) is in an environment with 50% relative humidity, approximately static air (the wind speed is approximately 0.1 m/s), the air temperature is the same as the average radiation temperature, and the metabolism rate is 1met (the human body is in a static sitting position), if the average skin temperature and the skin humidity of the human body are the same as the thermal resistance conditions of an actual environment and the actual clothes, the human body has the same heat dissipation capacity in the standard environment and the actual environment, the air temperature of the standard environment is the standard effective temperature SET of the environment in which the actual is located, and all areas or most areas in the whole room are required to 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 actual return air temperature Ta is the actual indoor air temperature, and is detected by the indoor environment temperature sensor 521. The actual air outlet temperature ta_out can be directly measured by an air outlet temperature sensor 522 installed at the indoor air outlet 34, and can also be characterized by the indoor coil temperature Te, and is calculated by a preset empirical formula ta_out=k1×te. The indoor coil temperature Te is measured by a coil temperature sensor 523 provided at the indoor coil, and K1 is a temperature constant, obtained from a plurality of tests or experience.

Step S12, calculating the target wind temperature according to the SET standard effective temperature SET and the wind speed Va.

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 is defaulted to 50% (when the air conditioner 10 is in cooling operation, the humidity of the indoor air has been reduced after passing through the evaporator, and the relative humidity of the air blown out by the air conditioner 10 is generally between 40% and 70%, defaulted to 50%). The thermal resistance of the summer clothing is 0.6clo, and the metabolism rate is 1.0M. The set=f (Ta, va, rh, tr, M, clo) calculation procedure is simplified to a function that solves 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, the user may preset a value of the standard effective temperature SET, for example, 25 ℃, according to his own needs. The user can also preset the value of the wind speed Va according to the own requirements. Typically, a user wishes to have a sense of wind on his body, and the wind speed is more comfortable and does not wish to have a higher wind speed. Thus, normally, the comfortable wind speed Va is less than or equal to 0.3m/s in summer, and the wind speed Va is less than or equal to 0.1m/s, and no wind is considered, so that the wind speed range when the directional air supply is comfortable is predicted to be 0.1m/s < Va less than or equal to 0.3m/s, and the position of the user is at the tail end of the air flow of the air conditioner 10. For example, a comfortable wind speed va=0.3 m/s in the measuring point area where the user is located is SET, and after the current SET standard effective temperature SET and the current SET wind speed Va are obtained, the target wind temperature ta_s is calculated according to a ta=f (SET, va) function fitted in advance.

It should be noted that, the standard effective temperature SET by the user refers to the standard effective temperature that needs to be reached by the position where the user is located or the position where the user SETs the measuring point, and the target air temperature ta_s refers to the air temperature that needs to be reached by the position where the user is located or the center of the air flow band where the user SETs the measuring point.

And S13, calculating the target air outlet temperature according to the target air temperature Ta_s and the actual return air temperature Ta to obtain a target air outlet temperature range.

The controller 40 obtains the current actual return air temperature Ta in real time through the indoor environment temperature sensor 521, and after obtaining the actual return air temperature Ta, the controller can calculate the target air outlet temperature ta_out _s required by the user by combining the target air temperature Ta _s, the air supply condition of the current air conditioner 10, the air speed Va required by the user and other information, so that the air temperature can meet the standard effective temperature SET when the indoor unit 30 air-out reaches the SET measuring point or the position of the user.

The target outlet air temperature range [ Ta_out _s-ΔT,Ta_out_s +DeltaT ], deltaT >0, including the target outlet air temperature Ta_out _s is determined based on the target outlet air temperature Ta_out _s. Wherein Δt is a temperature constant, and Δt >0. The value of Δt may be set according to actual requirements, and in some embodiments of the present disclosure, the value of Δt ranges from 0.1 ℃ to 5 ℃.

Step S14, judging whether the actual air-out temperature Ta_out is out of the target air-out temperature range [ Ta_out _s-ΔT,Ta_out_s +DeltaT ]. If yes, go to step S15, if no, go to step S16.

Step S15, adjusting the frequency of the compressor 21.

The controller 40 compares the actual air outlet temperature ta_out with the target air outlet temperature ta_out _s, and adjusts the current operation frequency of the compressor 21 according to the comparison result, so that the actual air outlet temperature ta_out approaches to the target air outlet temperature ta_out _s. The manner in which the frequency of the compressor 21 is adjusted includes increasing the frequency of the compressor 21 or decreasing the frequency of the compressor 21.

Step S16, the frequency of the compressor 21 is maintained unchanged.

According to the control method of the air conditioner, a concept of a standard environment temperature SET is introduced, and the control of the operation frequency of the compressor 21 is achieved 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, and a comfortable environment is better provided for the user. In some embodiments of the present disclosure, the controller 40 calculates the target wind temperature ta_s according to the SET standard effective temperature SET and the wind speed Va in step 12, including:

And determining the wind temperature corresponding to the currently SET standard effective temperature SET and the wind speed Va as a target wind temperature Ta_s according to the corresponding relation among the preset standard effective temperature, the wind speed and the wind temperature.

It should be noted that, in the preset corresponding relationship between the standard effective temperature, the wind speed and the wind temperature, when the wind speed Va is fixed, the standard effective temperature SET and the wind temperature are in a positive correlation; when the wind temperature is constant, the standard effective temperature and the wind speed Va are in negative correlation.

In some embodiments of the present disclosure, the correspondence between the actual return air temperature Ta, the wind speed Va, and the standard effective temperature SET is shown in table 1.

TABLE 1 correspondence of actual Return air temperature, wind speed and wind temperature

Note that table 1 is a table of wind temperature-wind speed-standard effective temperature relationship of the standard effective temperature SET decoupled by a function of set=f (Ta, va). The first row in Table 1 represents the wind speed Va at the center of the airflow zone in m/s; the first column on the left is the air temperature in degrees celsius, which in some embodiments of the present disclosure may be the actual return air temperature Ta, the target air temperature ta_s, the actual outlet air temperature ta_out, the target outlet air temperature ta_out _s, etc.; the values in the table are the standard effective temperature SET in c.

The correspondence between the preset standard effective temperature SET, the wind speed Va and the wind temperature can be deduced from table 1, as shown in table 2.

TABLE 2 correspondence between effective temperatures, wind speeds and wind temperatures

Table 2 is a table of a standard effective temperature-wind speed-wind temperature relationship decoupled by a function of an inverse function ta=f (SET, va). The first row in Table 2 represents the wind speed Va at the center of the airflow zone in m/s; the first column on the left is the standard effective temperature SET in degrees Celsius; the values in the table are the wind temperature in degrees celsius.

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 obtaining the currently SET standard effective temperature SET and the currently SET wind speed Va, the target wind temperature Ta _s is obtained according to table 2. For example, when the user SETs the standard effective temperature SET to 25 ℃, the wind speed Va is 0.3m/s, the target wind temperature Ta _s =25.5 ℃ can be obtained according to table 2.

As can be seen from table 2, in the case where the standard effective temperature SET is fixed, there are a plurality of SETs of combinations of the actual return air temperature Ta and the air speed Va. For example, when set=20 ℃, there are combinations of plural SETs of actual return air temperatures Ta and wind speeds Va such as (21 ℃,0.3 m/s), (21.5 ℃,0.6 m/s), (22 ℃,0.8 m/s), (22.5 ℃,1.0 m/s), (23 ℃,1.4 m/s), (23 ℃,2.0 m/s), (23.5 ℃,3.0 m/s).

Fig. 4 is a flowchart of another control method of an air conditioner according to some embodiments, as shown in fig. 4, in some embodiments of the present disclosure, step S13 may include steps S131 to S136.

Step S131, the currently set indoor fan gear is obtained.

In some embodiments of the present disclosure, a user may adjust the air outlet size of the air conditioner 10 by adjusting an indoor fan gear of the air conditioner 10, where the indoor fan gear indicates a rotational speed of the indoor fan motor 33, and the larger the rotational speed of the indoor fan motor 33, the larger the corresponding indoor fan gear.

For example, the indoor fan includes 5 gears, respectively 1 gear, and the rotation speed of the corresponding indoor fan motor 33 is 600rpm;2 nd gear, the corresponding rotational speed of the indoor fan motor 33 is 750rpm;3 rd gear, the corresponding rotational speed of the indoor fan motor 33 is 900rpm;4 th gear, the corresponding rotational speed of the indoor fan motor 33 is 1050rpm;5 th gear, the corresponding rotational speed of the indoor fan motor 33 is 1200rpm.

It should be noted that, the level of the indoor fan gear and the rotation speed range of the indoor fan motor 33 corresponding to each level may be set according to the actual situation, which is not limited in the present disclosure.

Step S132, determining a corresponding air supply distance as a target air supply distance according to a preset indoor fan gear and an air speed Va.

In the preset correspondence between the indoor fan gear, the wind speed and the air supply distance, the air supply distance and the indoor fan gear are in positive correlation, and the wind speed Va and the indoor fan gear are in positive correlation. The wind speed Va at this time is the wind speed at the center of the airflow zone.

For example, FIG. 10 is a graph of outlet airflow band center distance versus wind speed for an air conditioner according to some embodiments. The correspondence relationship between the indoor fan gear position, the wind speed Va and the air supply distance is shown in table 3.

Table 3 correspondence of indoor fan gear, wind speed and air supply distance

In table 3, the first distance between the center of the airflow zone and the indoor air outlet 34, i.e., the air-feeding distance, is expressed as m; the first column on the left side is an indoor fan gear; the values in the table are the wind speeds Va in m/s in the center of the airflow zone. Fig. 5 is a schematic view of an indoor unit of an air conditioner according to some embodiments, and fig. 6 is another schematic view of an indoor unit of an air conditioner according to some embodiments, as shown in fig. 5 and 6, a user sets a current indoor fan gear in advance according to his/her own needs, and after detecting the current indoor fan gear, the controller 40 obtains a target supply air distance ρ_s according to table 3 and a wind speed Va set by the user.

In step S133, the distance between the user and the air conditioner 10 is estimated according to the target air supply distance ρ_s, and the user distance ρ is obtained.

The user sets an indoor fan gear, so that the wind speed Va of the user set measurement point is the wind speed required by the user, for example va=0.3 m/s, at this time, the target air supply distance ρ_s can be determined by the rotation speed of the indoor fan motor 33 and the wind speed Va, and the distance between the user and the indoor air outlet 34 (i.e. the user distance ρ) is estimated according to the target air supply distance ρ_s. For example, when the user sets the current indoor fan gear to 4, and the wind speed Va is about 0.3m/s, the user distance ρ is about 4m.

In some embodiments of the present disclosure, the user distance ρ is equal to the target supply air distance ρ_s, but the present disclosure is not limited thereto.

In step S134, the current farthest air supply distance of the air conditioner 10 is calculated based on the target air supply distance ρ_s.

Based on the estimated user distance ρ, the current farthest air supply distance ρ _max of the air conditioner 10 is calculated. For example, based on the target air blowing distance ρ_s and the preset wind speed difference, the farthest air blowing distance ρ _max.ρ_max =ρ_s+Δρ formula 1 is calculated by formula 1

Wherein ρ_s is the target air supply distance, and Δρ is the preset air speed difference.

For example, assume that the wind speed Va set by the user is 0.3m/s, and the wind speed Va that the user cannot perceive is 0.1m/s. The pre-test yields a decay from a wind speed va=0.3 m/s to va=0.1 m/s, approximately 0.8m being required, at which point Δρ≡0.8m.

The maximum air supply distance ρ _max is a limit distance of the wind speed Va (for example, va is equal to or less than 0.1 m/s) which is not perceived by the user. The distance difference Deltaρ between the measuring point meeting the wind speed Va set by the user and the measuring point of the wind speed Va which cannot be perceived by the user is preset, and the farthest air supply distance ρ _max is calculated according to the target air supply distance ρ_s and the distance difference Deltaρ.

In step S135, the target air outlet temperature ta_out _s is calculated according to the actual return air temperature Ta, the target air temperature ta_s, the user distance ρ and the maximum air supply distance ρ _max by equation 2.

In step S136, the controller 40 determines the target outlet temperature range [ ta_out _s-ΔT,Ta_out_s +Δt ] according to the target outlet temperature ta_out _s, Δt > 0.

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 S15 may include steps S150 to S152.

Step S150, it is determined whether the actual air outlet temperature ta_out satisfies ta_out < ta_out _s - Δt, if yes, step S151 is executed, and if no, step S152 is executed.

Step S151, the current frequency of the compressor 21 is reduced according to the preset frequency adjustment step.

The controller 40 detects the actual outlet air temperature ta_out in real time, and controls the frequency of the compressor 21 to decrease by Δf when the detected actual outlet air temperature ta_out < ta_out _s - Δt. In some embodiments of the present disclosure, the preset frequency adjustment step Δf ranges from 0.1Hz to 20Hz.

In step S152, the current frequency of the compressor 21 is increased according to the preset frequency adjustment step.

When the controller 40 detects that the actual outlet air temperature ta_out > ta_out _s +Δt, the controller 40 controls the frequency of the compressor 21 to rise by Δf.

In some embodiments of the present disclosure, the controller 40 calculates the target air outlet temperature ta_out _s at any time, adjusts the frequency of the compressor 21 according to the relationship between the target air outlet temperature ta_out _s and the target air outlet temperature range, or after keeping the frequency of the compressor 21 unchanged, re-detects the actual return air temperature Ta after a delay of T1 seconds, substitutes the actual return air temperature Ta into formula 2 to calculate the new target air outlet temperature ta_out _s (if the user resets the standard effective temperature SET and/or the indoor fan gear during the period, substitutes the new setting parameter into formula 2), and controls the frequency of the compressor 21, so as to control the actual air outlet temperature ta_out within the target air outlet temperature range [ ta_out _s-ΔT,Ta_out_s +Δt ], and repeats the process with T1 seconds as a detection period. T1 is, for example, 10 to 600 seconds.

For example, a certain 1.5-piece model parameter is set to Δt=1 ℃, t1=30 s, Δf=5 Hz.

The user starts the directional comfort function, SETs the standard effective temperature SET to 25 ℃, SETs the wind speed Va to about 0.3m/s, SETs the indoor fan gear to 3 gears, and SETs the Deltaρ to be about 0.8m. According to tables 2 and 3, the target air temperature ta_s=25.5 ℃, ρ=3.5m, ρ _max =4.3m are obtained, the target air temperature ta_s, the user distance ρ, the farthest air supply distance ρ _max and the detected actual return air temperature ta=28 ℃ are substituted into the formula 2, and the set target air outlet temperature ta_out _s = (25.5x4.3-28 x 3.5)/(4.3-3.5)/(14.5) is calculated, and the target air outlet temperature range is [13.5 ℃,15.5 ℃).

After the directional comfort function is activated, the controller 40 controls the outlet air temperature sensor 522 to detect the actual outlet air temperature ta_out in real time, and when ta_out=18 ℃ > 15.5 ℃, the controller 40 increases the frequency of the compressor 21 by 5Hz on the basis of the current frequency. After 30s, if the parameters set by the user are unchanged, the controller 40 controls the indoor environment temperature sensor 521 to detect the current actual return air temperature ta=28 ℃, and substitutes the current actual return air temperature ta=28 ℃ into the formula 2 again, so that ta_out _s =14.5 ℃ is calculated, the target air outlet temperature range is [13.5 ℃,15.5 ℃ ], the real-time air outlet temperature ta_out=15.5 ℃ e [13.5 ℃,15.5 ℃ ], and at this time, the frequency of the compressor 21 is kept unchanged by the controller 40.

For example, in a new period, if the controller 40 controls the indoor ambient temperature sensor 521 to detect the actual return air temperature ta=27.5 ℃, and other settings are unchanged, the target outlet air temperature ta_out _s = (25.5×4.3-27.5×3.5)/(4.3-3.5) ≡16.0 ℃ is calculated, and the target outlet air temperature range is [15.0 ℃,17.0 ℃) ]. The actual outlet air temperature ta_out=15.5°c e [15.0 ℃,17.0 ℃), at which time the controller 40 keeps the frequency of the compressor 21 unchanged.

For another example, in a new period, the user changes the SET standard effective temperature SET to 26 ℃, and the controller 40 controls the indoor environment temperature sensor 521 to detect the actual return air temperature ta=27 ℃, so as to calculate the SET target outlet air temperature ta_out _s = (26×4.3-27×3.5)/(4.3-3.5) ≡21.5 ℃, and the target outlet air temperature range is [20.5 ℃,22.5 ℃). The actual outlet air temperature ta_out=16.5 ℃ < 20.5 ℃, at which point the controller 40 reduces the frequency of the compressor 21 by 5Hz on the basis of the current frequency. Repeating the above steps until the real-time air outlet temperature Ta_out epsilon [20.5 ℃ and 22.5 ℃).

In some embodiments of the present disclosure, the indoor air outlet 34 includes a horizontal air guide plate and a vertical air guide plate, and a user may control the horizontal air guide plate, the vertical air guide plate, or readjust the air speed Va according to actual needs, so that the air outlet end of the air conditioner 10 covers the measuring point area where the user is located.

According to the control method of the air conditioner, which is disclosed by some embodiments, the concept of the standard environmental temperature SET is introduced, and the control of the operation frequency of the air conditioner 10 is realized by considering two influencing factors of the wind speed and the wind temperature, so that the conditions that the higher the wind temperature is, the lower the standard effective temperature sensed by a human body is and the like are unfavorable for the health of a user when the wind temperature is the same are avoided, and the operation frequency of the air conditioner 10 is adjusted more accurately and effectively. And, through the information such as wind speed Va, indoor fan gear that the user set for, confirm the distance between user and the air conditioner 10 for the user sets for the standard effective temperature of measuring point or user place can reach the required standard effective temperature of user as early as possible, compare in making the temperature of all regions of whole room balanced comfortable, can have pertinence more, and more energy-conserving, better provides a comfortable environment for the user.

Fig. 8 is a flowchart of a control method of yet another air conditioner according to some embodiments, as shown in fig. 8, the control method including steps S21 to S26.

Step S21, obtaining the currently SET standard effective temperature SET and preset parameters, and detecting the actual return air temperature Ta and the actual outlet air temperature Ta_out.

The difference from fig. 3 is mainly that the preset parameters are different.

In some embodiments of the present disclosure, the preset parameters include an indoor fan gear and a target air supply distance ρ_s, and the user may determine the target air supply distance ρ_s according to the user distance ρ. As shown in fig. 5 and 6, the temperature at the indoor air outlet 34 is low, and the user typically does not stand at the indoor air outlet 34 for a long time but is located at a distance of 1m or more from the air outlet, so the user may set the distance between the center of the airflow zone and the indoor air outlet 34 to be 1.5m, for example, and the target air supply distance ρ_s 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 34 being 1.5m, the air temperature rises and the air speed Va decreases with the increase of the distance between the user and the indoor air outlet 34, and the standard effective temperature SET rises, so that the standard effective temperature SET felt by the user increases with the increase of the distance, and the requirement that the user expects the air conditioner 10 to cool the air after cooling is also met. If the wind speed Va is not considered, the output of the refrigerating capacity of the air conditioner 10 is reduced by controlling the wind temperature in a single dimension, the time for reaching the SET standard effective temperature SET indoors is prolonged, and even the SET standard effective temperature SET is not reached all the time.

Step S22, calculating a target air temperature Ta _s according to the standard effective temperature SET, the indoor fan gear and the target air supply distance ρ_s.

After the standard effective temperature SET, the indoor fan gear and the target air supply distance ρ_s SET currently are obtained, the target air speed Va required at the target air supply distance ρ_s can be calculated, and then the target air temperature Ta _s is calculated according to a pre-fitted ta=f (SET, va) function.

In step S23, a target air outlet temperature ta_out _s is calculated according to the actual return air temperature Ta, the target air temperature ta_s and the target air supply distance ρ_s, so as to determine a target air outlet temperature range.

After the actual return air temperature Ta is obtained, the controller 40 combines the information of the target air temperature Ta _s, the target air supply distance ρ_s and the like to calculate the target air outlet temperature ta_out _s required by the user, so that the position can meet the standard effective temperature SET when the air conditioner 10 blows air to the target air supply distance ρ_s.

A target outlet air temperature range [ Ta_out _s-ΔT,Ta_out_s +DeltaT ] including the target outlet air temperature is determined based on the target outlet air temperature Ta_out _s.

Step S24, determining whether the actual air-out temperature ta_out is outside the target air-out temperature range, if so, executing step S25, otherwise, executing step S26.

Step S25, adjusting the frequency of the compressor 21.

It should be noted that, the manner in which the controller 40 adjusts the frequency of the compressor 21 and the advantages achieved are the same as those of the above embodiment, and will not be described herein.

Step S26, maintaining the frequency of the compressor 21 unchanged.

Fig. 9 is a flowchart of a control method of yet another air conditioner according to some embodiments, and as shown in fig. 9, step S22 includes steps S221 and S222.

In step S221, a wind speed corresponding to the currently set indoor fan gear and the target air supply distance ρ_s is determined as the target wind speed va_s.

In the preset correspondence between the indoor fan gear, the air supply distance and the air speed Va, the air speed Va and the indoor fan gear are in positive correlation, and the air speed Va and the air supply distance are in negative correlation.

Some embodiments of the present disclosure achieve subsequent control by obtaining a target wind speed va_s according to table 3 through a variable indoor fan gear and a target supply air distance ρ_s determined by a user according to a position where the user is located.

In step S222, the actual return air temperature Ta corresponding to the currently SET standard effective temperature SET and the target wind speed va_s is determined as the target wind temperature ta_s.

According to table 2, the actual return air temperature Ta corresponding to the currently SET standard effective temperature SET and the target wind speed va_s is determined as the target wind temperature ta_s.

Fig. 11 is a flowchart of setting an indoor fan gear according to some embodiments, and as shown in fig. 11, some embodiments of the present disclosure provide a method of automatically setting an indoor fan gear, the method including steps S01 to S03.

Step S01, obtaining the target refrigeration temperature set currently and detecting the actual return air temperature Ta.

The target cooling temperature Ts is set by the user.

Step S02, calculating the current temperature difference according to the target refrigeration temperature Ts and the actual return air temperature Ta.

The temperature difference E refers to the difference between the actual return air temperature Ta and the target refrigeration temperature Ts, i.e., e=ta-Ts.

Step S03, determining the indoor fan gear corresponding to the current temperature difference E according to the corresponding relation between the preset temperature difference E and the indoor fan gear.

It should be noted that, in the corresponding relationship between the preset temperature difference and the indoor fan gear, the indoor fan gear and the temperature difference E are in a positive correlation.

In some embodiments of the present disclosure, the correspondence between the temperature difference E and the indoor fan gear is shown in table 4.

Table 4 correspondence between temperature difference and indoor fan gear

In some embodiments of the present disclosure, the controller 40 calculates a temperature difference E according to the received target cooling temperature Ts and the current detected actual return air temperature Ta, obtains a currently desired set indoor fan gear according to table 4, and controls the indoor fan 32 to operate according to the set indoor fan gear.

Fig. 12 is a flowchart of a control method of yet another air conditioner according to some embodiments, and as shown in fig. 12, step S23 may include steps S231 to S233.

In step S231, the maximum air supply distance ρ _max corresponding to the currently set indoor fan gear is determined according to the preset correspondence between the indoor fan gear and the maximum air supply distance ρ _max.

In the preset corresponding relation between the indoor fan gear and the farthest air supply distance, the farthest air supply distance rho _max and the indoor fan gear are in positive correlation.

The farthest air-sending distance ρ _max of the air conditioner 10 is related to the currently set indoor fan gear, and the correspondence relationship between the indoor fan gear and the farthest air-sending distance ρ _max is shown in table 5.

Table 5 correspondence between indoor fan gear and farthest air supply distance

The farthest air supply distance ρ _max of the current air conditioner 10 can be obtained according to the currently set indoor fan gear.

In step S232, a target outlet air temperature ta_out _s is calculated.

The controller 40 calculates a target outlet air temperature ta_out _s according to the actual return air temperature Ta, the target air temperature Ta _s, the target air supply distance ρ_s, and the maximum air supply distance ρ _max by equation 3.

In step S233, the target air-out temperature range is determined according to the target air-out temperature ta_out _s and the temperature constant Δt.

According to the difference value of the target air outlet temperature Ta_out _s and the preset temperature constant delta T, the lower limit value of the target air outlet temperature range is determined to be Ta_out _s -delta T, and according to the sum of the target air outlet temperature Ta_out _s and the preset temperature constant delta T, the upper limit value of the target air outlet temperature range is determined to be Ta_out _s +delta T, namely, the target air outlet temperature range [ Ta_out _s-ΔT,Ta_out_s +delta T ] is determined.

For example, the user SETs the standard effective temperature set=16℃, and calculates the target outlet air temperature ta_out _s, see table 6 for details.

TABLE 6 correspondence between parameters for a target supply distance of 1.5m with a standard effective temperature SET of 16 deg.C

As shown in table 6, in some embodiments of the present disclosure, the user turns on the outlet standard effective temperature SET function, and the user SETs the standard effective temperature SET to, for example, 16 ℃, and the target supply air distance ρ_s is, for example, 1.5m. At this time, a target cooling temperature Ts is set, a temperature difference E is calculated from the actual return air temperature Ta detected by the indoor environment temperature sensor 521, and a set indoor fan gear is obtained from table 4. The target wind speed va_1.5_s and the farthest air supply distance ρ _max at 1.5m from the indoor air outlet 34 are determined according to tables 3 and 5, and the target wind temperature ta_1.5_s at 1.5m from the indoor air outlet 34 is calculated according to table 2.

Substituting the parameters into the formula 3, calculating to obtain a set target air outlet temperature Ta_out _s, and obtaining a target air outlet temperature range [ Ta_out _s-ΔT,Ta_out_s +delta T ]. The actual outlet air temperature ta_out is obtained, compared with the target outlet air temperature range, and the frequency of the compressor 21 is controlled and adjusted (e.g. increased, decreased or kept unchanged) according to the comparison result.

Fig. 13 is a flowchart of a control method of an air conditioner according to another embodiment, as shown in fig. 13, when the air conditioner 10 receives a command for starting an air outlet standard effective temperature function, the controller 40 obtains a standard effective temperature SET, a target air supply distance ρ_s, and a SET indoor fan gear SET by a user, and calculates a target air temperature Ta _s after detecting an actual return air temperature Ta and an actual air outlet temperature ta_out, calculates a target air outlet temperature ta_out _s according to the above parameters, and determines a target air outlet temperature range [ ta_out _s-ΔT,Ta_out_s +Δt ]. Finally, it is determined whether the frequency of the compressor 21 needs to be adjusted according to the relation between the actual air outlet temperature ta_out and the target air outlet temperature range [ ta_out _s-ΔT,Ta_out_s +Δt ], and if the frequency of the compressor 21 needs to be adjusted, the frequency of the compressor 21 is increased or decreased.

In some embodiments of the present disclosure, when a user adjusts an indoor fan gear or an automatic wind automatically adjusts an indoor fan gear according to a temperature difference E, the actual return air temperature Ta, the target wind speed Va, the farthest air supply distance ρ _max, and the target wind temperature Ta _s need to be obtained again, and the new set outlet air temperature ta_out _s is calculated by substituting into formula 3.

In some embodiments of the present disclosure, the controller 40 calculates the target air outlet temperature ta_out _s at any time, adjusts the frequency of the compressor 21 according to the relationship between the target air outlet temperature ta_out _s and the target air outlet temperature range, or after keeping the frequency of the compressor 21 unchanged for T1 seconds, re-detects the actual return air temperature Ta, substitutes the actual return air temperature Ta into the formula 3 to calculate the new target air outlet temperature ta_out _s (if the user resets the standard effective temperature SET and/or the indoor fan gear during the period, brings the reset setting parameters into the formula 3), and controls the frequency of the compressor 21 to control the actual air outlet temperature ta_out within the target air outlet temperature range [ ta_out _s-ΔT,Ta_out_s +Δt ], and then takes T1 seconds as a detection period, and repeats the process. T1 is, for example, 10 to 600 seconds.

For example, a certain 1.5-piece model parameter set: Δt1=1 ℃, t1=30 s, Δf=5 Hz.

The user starts the air outlet standard effective temperature control function, SETs the standard effective temperature SET to 16 ℃, SETs the target air supply distance rho_s to 1.5m, SETs the target refrigeration temperature Ts to 26 ℃, SETs the indoor fan gear to be automatic air, detects the actual return air temperature Ta=29 ℃, and determines that the indoor fan gear is 4 according to table 4 when the temperature difference E=29-26=3 ℃ is more than 2 ℃. The furthest blowing distance ρ _max =4.8m is obtained according to table 5, the wind speed va=1.91 m/s is determined according to table 3, the target air temperature ta_1.5_s=20 ℃ at the position 1.5m away from the air outlet is obtained according to va=1.91 m/s and table 2, the actual return air temperature ta=29 ℃ is obtained through detection, the parameters are substituted into formula 3, the set target air outlet temperature ta_out _s is calculated to be approximately 15.5 ℃, and the target air outlet temperature range is determined to be [14.5 ℃ and 16.5 ℃.

After the air outlet standard effective temperature control function is started, the controller 40 controls the air outlet temperature sensor 522 to detect the actual air outlet temperature ta_out=20 ℃ > 16.5 ℃ in real time, and then the controller 40 increases the frequency of the compressor 21 by 5Hz on the basis of the current frequency. After 30s, the controller 40 controls the indoor environment temperature sensor 521 to detect ta=28 ℃, at this time, the temperature difference e=28-26=2 ℃ is not less than 2 ℃, the indoor fan gear is still 4, the required parameters are obtained respectively, and the required parameters are substituted into equation 3 again, the target air outlet temperature ta_out _s =16 ℃ is obtained through calculation, the target air outlet temperature range is determined to be [15.0 ℃,17.0 ] ], the actual air outlet temperature ta_out=15.5 ℃ E [15.0 ℃,17.0 ] ], and at this time, the controller 40 keeps the frequency of the compressor 21 unchanged.

For example, in a new period, the controller 40 controls the indoor environment temperature sensor 521 to detect the actual return air temperature ta=27 ℃, other settings are unchanged, the temperature difference e=27-26=1 ℃ < 2 ℃, the indoor fan gear is automatically adjusted to 3 stages, the farthest air supply distance ρ _max =4.3m is obtained according to table 5, the air speed va=1.72 m/s is determined according to table 3, the target air temperature ta_1.5_s=19.5 ℃ at the position 1.5m from the air outlet is obtained according to the air speed va=1.72 m/s and table 2, the above parameters are substituted into the formula 3 to calculate the target air outlet temperature ta_out _s +_15.0 ℃, and the target air outlet temperature range is determined to be [14.0 ℃,16.0 ℃. The actual outlet air temperature ta_out=13 ℃ < 14 ℃, the controller down-regulates the frequency of the compressor 21 by 5Hz on the basis of the current frequency.

For another example, in a new cycle, the controller 40 controls the indoor environment temperature sensor 521 to detect the actual return air temperature ta=26 ℃, calculates the temperature difference e=26-26=0 ℃ < 0.5 ℃, automatically adjusts the indoor fan gear to 2 stages, obtains the farthest air supply distance ρ _max =3.8m according to table 5, determines the air speed va=1.18m/s according to table 3, obtains the target air temperature ta_1.5_s=19 ℃ at the position 1.5m away from the air outlet according to va=1.18 m/s and table 2, and calculates the target air outlet temperature ta_out _s +_14.0 ℃ by substituting the parameters into the formula 3, and determines the target air outlet temperature range to be [13.0 ℃,15.0 ℃. The actual outlet air temperature ta_out=13°c e [13.0 ℃,15.0 ℃), the controller 40 keeps the frequency of the compressor 21 unchanged at the current frequency. At this time, the indoor environment temperature reaches the SET temperature of 26 ℃, and the standard effective temperature SET reaches the SET standard effective temperature of 16 ℃.

The control method of the air conditioner according to some embodiments of the present disclosure has the same advantages as those of the foregoing embodiments, and will not be described herein.

Those skilled in the art will appreciate that implementing all or part of the above-described methods in accordance with the embodiments may be accomplished by way of a computer program stored in a computer-readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), or the like.

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

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; and

A controller configured to:

Acquiring a currently set standard effective temperature and preset parameters, and detecting an actual return air temperature and an actual air outlet temperature;

calculating a target wind temperature according to the set standard effective temperature and preset parameters;

Calculating a target air outlet temperature according to the target air temperature and the actual return air temperature to obtain a target air outlet temperature range;

And if the actual air outlet temperature is determined to be outside the target air outlet temperature range, adjusting the frequency of the compressor.
The air conditioner of claim 1, wherein the preset parameter includes a wind speed;

the calculating the target wind temperature according to the set standard effective temperature and wind speed comprises the following steps:

Determining the currently set standard effective temperature and the wind temperature corresponding to the wind speed as the target wind temperature according to the corresponding relation between the preset standard effective temperature, the wind speed and the wind temperature;

in the corresponding relation among the preset standard effective temperature, the wind speed and the wind temperature, when the wind speed is fixed, the standard effective temperature and the wind temperature are in positive correlation; and when the wind temperature is fixed, the standard effective temperature and the wind speed are in negative correlation.
The air conditioner of claim 1, wherein the preset parameter includes a wind speed;

Calculating a target air outlet temperature according to the target air temperature and the actual return air temperature to obtain a target air outlet temperature range, wherein the method comprises the following steps of:

Acquiring a currently set indoor fan gear;

Determining the currently set air supply distance corresponding to the indoor fan gear and the air speed as a target air supply distance according to the corresponding relation among the preset indoor fan gear, the air speed and the air supply distance;

In the corresponding relation among the preset indoor fan gear, wind speed and air supply distance, the air supply distance and the indoor fan gear are in positive correlation, and the wind speed and the indoor fan gear are in positive correlation;

Estimating the distance between a user and the air conditioner according to the target air supply distance to obtain the user distance;

Calculating the current farthest air supply distance of the air conditioner according to the target air supply distance;

calculating the target air outlet temperature according to the actual air return temperature, the target air temperature, the user distance and the farthest air supply distance;

And determining the target air outlet temperature range [ Ta_out _s-ΔT,Ta_out_s +delta T ] according to the target air outlet temperature, wherein delta T is more than 0.
The air conditioner of claim 3, wherein the calculating the current farthest supply air distance of the air conditioner according to the target supply air distance comprises:

and calculating the furthest air supply distance according to the target air supply distance and a preset air speed difference value.
The air conditioner of claim 3, wherein the adjusting the frequency of the compressor if it is determined that the actual outlet air temperature is not within the target outlet air temperature range comprises:

When the actual air outlet temperature meets Ta_out < Ta_out _s -DeltaT, reducing the current frequency of the compressor according to a preset frequency adjustment step length;

And when the actual air outlet temperature meets Ta_out & gtTa_out _s +delta T, increasing the current frequency of the compressor according to a preset frequency adjustment step length.
The air conditioner of any one of claims 1 to 5, wherein after the calculating a target outlet air temperature from the target air temperature and the actual return air temperature, the controller is further configured to:

And when the actual air outlet temperature is in the target air outlet temperature range [ Ta_out _s-ΔT,Ta_out_s +delta T ], maintaining the current frequency of the compressor unchanged.
The air conditioner of claim 1, wherein the preset parameters include an indoor fan gear and a target supply air distance;

Calculating a target air outlet temperature according to the target air temperature and the actual return air temperature to obtain a target air outlet temperature range, wherein the method comprises the following steps of:

And calculating a target air outlet temperature according to the target air temperature, the actual return air temperature and the target air supply distance so as to determine a target air outlet temperature range.
The air conditioner of claim 7, wherein the calculating a target air temperature according to the standard effective temperature, the indoor fan gear, and the target air supply distance comprises:

Determining the wind speed corresponding to the currently set indoor fan gear and the target air supply distance as a target wind speed according to the preset corresponding relation among the indoor fan gear, the air supply distance and the wind speed;

Determining the currently set standard effective temperature and the wind temperature corresponding to the target wind speed as the target wind temperature according to the corresponding relation between the preset standard effective temperature, the wind speed and the wind temperature;

In the corresponding relation among the preset indoor fan gear, the air supply distance and the wind speed, the wind speed and the indoor fan gear are in positive correlation, and the wind speed and the air supply distance are in negative correlation;

In the corresponding relation among the preset standard effective temperature, the wind speed and the wind temperature, when the wind speed is fixed, the standard effective temperature and the wind temperature are in positive correlation; and when the wind temperature is fixed, the standard effective temperature and the wind speed are in negative correlation.
The air conditioner of claim 8, wherein the indoor fan gear is an indoor automatic fan gear, and is automatically set by:

acquiring a target refrigeration temperature which is currently set;

Calculating a current temperature difference according to the target refrigeration temperature and the actual return air temperature;

Determining the indoor fan gear corresponding to the current temperature difference according to the corresponding relation between the preset temperature difference and the indoor fan gear;

In the corresponding relation between the preset temperature difference value and the indoor fan gear, the indoor fan gear and the temperature difference value are in positive correlation.
The air conditioner as set forth in claim 7, wherein said calculating a target outlet air temperature based on said actual return air temperature, said target air temperature and said target supply air distance to determine a target outlet air temperature range comprises:

Determining the furthest air supply distance corresponding to the currently set indoor fan gear according to the corresponding relation between the preset indoor fan gear and the furthest air supply distance;

In the corresponding relation between the preset indoor fan gear and the farthest air supply distance, the farthest air supply distance and the indoor fan gear are in positive correlation;

calculating the target air outlet temperature according to the actual air return temperature, the target air supply distance and the farthest air supply distance;

Determining the lower limit value of the target air-out temperature range according to the difference value of the target air-out temperature and a preset temperature constant; and determining the upper limit value of the target air outlet temperature range according to the sum of the target air outlet temperature and a preset temperature constant.
The air conditioner of claim 10, wherein the adjusting the compressor frequency if the actual outlet air temperature is determined to be outside the target outlet air temperature range comprises:

When the actual air outlet temperature is smaller than the lower limit value of the target air outlet temperature range, reducing the current frequency of the compressor according to a preset frequency adjustment step length;

And when the actual air outlet temperature is greater than the upper limit value of the target air outlet temperature range, increasing the current frequency of the compressor according to a preset frequency adjustment step length.
The air conditioner of claim 11, wherein after calculating a target outlet air temperature from the actual return air temperature, the target air temperature, and the target supply air distance to determine a target outlet air temperature range, the controller is further configured to:

And when the actual air outlet temperature is in the target air outlet temperature range, maintaining the current frequency of the compressor unchanged.
A frequency control method of air conditioner is applied to a controller of the air conditioner,

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; and

The controller is coupled with the compressor and the indoor fan respectively;

The control method comprises the following steps:

Acquiring a currently set standard effective temperature and preset parameters, and detecting an actual return air temperature and an actual air outlet temperature;

calculating a target wind temperature according to the set standard effective temperature and preset parameters;

Calculating a target air outlet temperature according to the target air temperature and the actual return air temperature to obtain a target air outlet temperature range;

And if the actual air outlet temperature is determined to be outside the target air outlet temperature range, adjusting the frequency of the compressor.
The frequency control method of claim 13, wherein the preset parameter comprises wind speed;

the calculating the target wind temperature according to the set standard effective temperature and wind speed comprises the following steps:

Determining the currently set standard effective temperature and the wind temperature corresponding to the wind speed as the target wind temperature according to the corresponding relation between the preset standard effective temperature, the wind speed and the wind temperature;

in the corresponding relation among the preset standard effective temperature, the wind speed and the wind temperature, when the wind speed is fixed, the standard effective temperature and the wind temperature are in positive correlation; and when the wind temperature is fixed, the standard effective temperature and the wind speed are in negative correlation.
The frequency control method of claim 13, wherein the preset parameter comprises wind speed;

Calculating a target air outlet temperature according to the target air temperature and the actual return air temperature to obtain a target air outlet temperature range, wherein the method comprises the following steps of:

Acquiring a currently set indoor fan gear;

Determining the currently set air supply distance corresponding to the indoor fan gear and the air speed as a target air supply distance according to the corresponding relation among the preset indoor fan gear, the air speed and the air supply distance;

In the corresponding relation among the preset indoor fan gear, wind speed and air supply distance, the air supply distance and the indoor fan gear are in positive correlation, and the wind speed and the indoor fan gear are in positive correlation;

Estimating the distance between a user and the air conditioner according to the target air supply distance to obtain the user distance;

Calculating the current farthest air supply distance of the air conditioner according to the target air supply distance;

calculating the target air outlet temperature according to the actual air return temperature, the target air temperature, the user distance and the farthest air supply distance;

And determining the target air outlet temperature range [ Ta_out _s-ΔT,Ta_out_s +delta T ] according to the target air outlet temperature, wherein delta T is more than 0.
The frequency control method of claim 15, wherein the calculating the current farthest air supply distance of the air conditioner according to the target air supply distance comprises:

and calculating the furthest air supply distance according to the target air supply distance and a preset air speed difference value.
The method of frequency control of claim 15, wherein adjusting the frequency of the compressor if the actual outlet air temperature is determined to be outside the target outlet air temperature range comprises:

When the actual air outlet temperature meets Ta_out < Ta_out _s -DeltaT, reducing the current frequency of the compressor according to a preset frequency adjustment step length;

And when the actual air outlet temperature meets Ta_out & gtTa_out _s +delta T, increasing the current frequency of the compressor according to a preset frequency adjustment step length.
The frequency control method of any of claims 13-17, wherein, after the calculating a target outlet air temperature from the target air temperature and the actual return air temperature, the controller is further configured to:

And when the actual air outlet temperature is in the target air outlet temperature range [ Ta_out _s-ΔT,Ta_out_s +delta T ], maintaining the current frequency of the compressor unchanged.
The frequency control method of claim 13, wherein the preset parameters include an indoor fan gear and a target supply air distance;

Calculating a target air outlet temperature according to the target air temperature and the actual return air temperature to obtain a target air outlet temperature range, wherein the method comprises the following steps of:

And calculating a target air outlet temperature according to the target air temperature, the actual return air temperature and the target air supply distance so as to determine a target air outlet temperature range.
The frequency control method of claim 19, wherein the calculating a target air temperature based on the standard effective temperature, the indoor fan gear, and the target air supply distance comprises:

Determining the wind speed corresponding to the currently set indoor fan gear and the target air supply distance as a target wind speed according to the preset corresponding relation among the indoor fan gear, the air supply distance and the wind speed;

Determining the currently set standard effective temperature and the wind temperature corresponding to the target wind speed as the target wind temperature according to the corresponding relation between the preset standard effective temperature, the wind speed and the wind temperature;

In the corresponding relation among the preset indoor fan gear, the air supply distance and the wind speed, the wind speed and the indoor fan gear are in positive correlation, and the wind speed and the air supply distance are in negative correlation;

In the corresponding relation among the preset standard effective temperature, the wind speed and the wind temperature, when the wind speed is fixed, the standard effective temperature and the wind temperature are in positive correlation; and when the wind temperature is fixed, the standard effective temperature and the wind speed are in negative correlation.
The frequency control method according to claim 20, wherein the indoor fan gear is an indoor automatic fan gear, and is automatically set by:

acquiring a target refrigeration temperature which is currently set;

Calculating a current temperature difference according to the target refrigeration temperature and the actual return air temperature;

Determining the indoor fan gear corresponding to the current temperature difference according to the corresponding relation between the preset temperature difference and the indoor fan gear;

In the corresponding relation between the preset temperature difference value and the indoor fan gear, the indoor fan gear and the temperature difference value are in positive correlation.
The frequency control method of claim 19, wherein the calculating a target outlet air temperature based on the actual return air temperature, the target air temperature, and the target supply air distance to determine a target outlet air temperature range comprises:

Determining the furthest air supply distance corresponding to the currently set indoor fan gear according to the corresponding relation between the preset indoor fan gear and the furthest air supply distance;

In the corresponding relation between the preset indoor fan gear and the farthest air supply distance, the farthest air supply distance and the indoor fan gear are in positive correlation;

calculating the target air outlet temperature according to the actual air return temperature, the target air supply distance and the farthest air supply distance;

Determining the lower limit value of the target air-out temperature range according to the difference value of the target air-out temperature and a preset temperature constant; and determining the upper limit value of the target air outlet temperature range according to the sum of the target air outlet temperature and a preset temperature constant.
The method of frequency control as set forth in claim 22, wherein said adjusting the compressor frequency if it is determined that the actual outlet air temperature is outside the target outlet air temperature range comprises:

When the actual air outlet temperature is smaller than the lower limit value of the target air outlet temperature range, reducing the current frequency of the compressor according to a preset frequency adjustment step length;

And when the actual air outlet temperature is greater than the upper limit value of the target air outlet temperature range, increasing the current frequency of the compressor according to a preset frequency adjustment step length.
The frequency control method of any of claims 19-23, wherein after the calculating a target outlet air temperature based on the actual return air temperature, the target air temperature, and the target supply air distance to determine a target outlet air temperature range, the controller is further configured to:

And when the actual air outlet temperature is in the target air outlet temperature range, maintaining the current frequency of the compressor unchanged.