CN115875825A - Outdoor fan control method and device and variable frequency air conditioner - Google Patents

Outdoor fan control method and device and variable frequency air conditioner Download PDF

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Publication number
CN115875825A
CN115875825A CN202211595072.6A CN202211595072A CN115875825A CN 115875825 A CN115875825 A CN 115875825A CN 202211595072 A CN202211595072 A CN 202211595072A CN 115875825 A CN115875825 A CN 115875825A
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China
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gear
temperature
maximum
outdoor fan
correction
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李海利
来盼盼
赵攀
郑根
阮天宇
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Ningbo Aux Electric Co Ltd
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Ningbo Aux Electric Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention provides an outdoor fan control method, an outdoor fan control device and a variable frequency air conditioner; wherein, the method comprises the following steps: correcting the maximum rotating speed value of the outdoor fan according to the operation mode of the variable frequency air conditioner, the indoor environment temperature and the outdoor environment temperature to obtain a maximum rotating speed correction value; correcting the rotating speed value corresponding to each of the rest gears according to the difference value between the highest rotating speed correction value and the highest rotating speed value to obtain the rotating speed correction value corresponding to each of the rest gears; and determining a target gear according to the condensation temperature and a preset temperature threshold, and controlling the outdoor fan to operate according to a target rotating speed correction value corresponding to the target gear. In the control mode, the rotating speed value of each gear of the outdoor fan is corrected through the indoor environment temperature and the outdoor environment temperature, so that the intelligent and accurate control of the outdoor fan is realized, and the running reliability of the system is ensured; meanwhile, the comfort and energy conservation under different scenes of refrigeration and heating are also considered, and the method has better practical value.

Description

Outdoor fan control method and device and variable frequency air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to an outdoor fan control method and device and a variable frequency air conditioner.
Background
Currently, when a variable frequency air conditioner is designed, the maximum rotating speed of an outdoor fan of the variable frequency air conditioner is generally a fixed value and is divided into a plurality of different high, medium and low gears, and the reference working condition defined by specific numerical values is a normal temperature rated value. The existing control method of the outdoor fan mainly detects the temperature Tcm of the middle part of a condenser every 3min after a compressor continuously operates for 5min, and controls the rotating speed of the outdoor fan according to the size of the Tcm, although the method can control the outdoor fan, different scenes of high temperature, normal temperature and low temperature can appear in practical use, and in order to ensure that the capacity and the energy efficiency under the rated working condition meet the standard, the highest rotating speed of the outdoor fan designed and established by the existing method does not consider the comfort difference under different states of high temperature and low temperature, so that the comfort and the energy saving performance of the frequency conversion air conditioner are reduced.
Disclosure of Invention
In view of the above, the present invention aims to provide a method and an apparatus for controlling an outdoor fan and a variable frequency air conditioner, so as to alleviate the above problems, not only realize intelligent and accurate control of the outdoor fan, but also ensure the operation reliability of the system; and the comfort and the energy-saving performance under different scenes of refrigeration and heating are also considered, and the method has better practical value.
In a first aspect, an embodiment of the present invention provides an outdoor fan control method, where the outdoor fan is configured with multiple gears, and each gear corresponds to a rotation speed value, the method includes: if the outdoor fan is started to operate, acquiring the indoor environment temperature and the outdoor environment temperature in real time; acquiring an operation mode of the variable frequency air conditioner, and correcting the maximum rotating speed value of the outdoor fan according to the operation mode, the indoor environment temperature and the outdoor environment temperature to obtain a maximum rotating speed correction value; the maximum rotating speed value is a rotating speed value corresponding to the maximum gear in the multiple gears; the operation modes comprise a cooling operation mode and a heating operation mode; calculating a difference value between the highest rotation speed correction value and the highest rotation speed value, and correcting the rotation speed value corresponding to each remaining gear according to the difference value to obtain the rotation speed correction value corresponding to each remaining gear; acquiring a condensation temperature, determining a target gear according to the condensation temperature and a preset temperature threshold, and controlling an outdoor fan to operate according to a target rotating speed correction value corresponding to the target gear; the condensation temperature is used for representing the temperature of the middle part of a condenser in the variable frequency air conditioner.
According to the control method of the outdoor fan, the rotating speed value of each gear of the outdoor fan is corrected through the indoor environment temperature and the outdoor environment temperature, the difference control under different refrigerating and heating scenes is taken into consideration, the intelligent and accurate control of the outdoor fan is realized, the operation reliability of the system is guaranteed, the comfort and the energy conservation under different refrigerating and heating scenes are taken into consideration, and the control method has a good practical value.
Preferably, the step of correcting the maximum rotation speed value of the outdoor fan according to the operation mode, the indoor ambient temperature and the outdoor ambient temperature includes: determining a corresponding correction coefficient according to the operation mode; wherein, the correction coefficient comprises a refrigeration correction coefficient and a heating correction coefficient; and correcting the maximum rotating speed value of the outdoor fan according to the indoor environment temperature and the outdoor environment temperature based on the correction coefficient to obtain a maximum rotating speed correction value.
Preferably, the step of correcting the maximum rotation speed value of the outdoor fan according to the indoor ambient temperature and the outdoor ambient temperature based on the correction coefficient includes: if the correction coefficient is a refrigeration correction coefficient, correcting the maximum rotating speed value according to the following formula: f Maximum correction =F Highest point of the design +(F Highest point of the design /k1)*(T Outer ring /35-1)*(T Inner ring /27); wherein, F Maximum correction Indicating a maximum speed correction value, F Highest point of the design Represents the maximum rotation speed value, k1 represents the refrigeration correction coefficient, T Inner ring Indicating the indoor ambient temperature, T Outer ring Representing the outdoor ambient temperature.
Preferably, the step of correcting the maximum rotation speed value of the outdoor fan according to the indoor ambient temperature and the outdoor ambient temperature based on the correction coefficient includes: if the correction coefficient is a heating correction coefficient, correcting the maximum rotating speed value according to the following formula: f Maximum correction =F Highest point of the design +(F Highest point of the design /k2)*(1-T Outer ring /7)*(20/T Inner ring ) (ii) a Wherein, F Maximum correction Indicating the corrected value of the maximum speed, F Highest point of the design Denotes the maximum rotation speed value, k2 denotes the heating correction coefficient, T Inner ring Indicating the indoor ambient temperature, T Outer ring Indicating the outdoor ambient temperature.
Preferably, the step of calculating a difference between the maximum rotation speed correction value and the maximum rotation speed value and correcting the rotation speed value corresponding to each of the remaining gears according to the difference includes: correcting the rotating speed value corresponding to each of the rest gears according to the following formula: fn Correction =Fn Initiation of +(F Maximum correction -F Highest point of the design ) (ii) a Wherein Fn Correction Indicating a correction value for the rotational speed, fn, corresponding to any of the remaining gear positions Initial Indicating the speed value, F, corresponding to that gear Maximum correction Indicating the corrected value of the maximum speed, F Highest point of the design Representing the highest rotational speed value.
Preferably, the preset temperature threshold includes a first temperature threshold, a second temperature threshold, a third temperature threshold, a fourth temperature threshold, a fifth temperature threshold and a sixth temperature threshold which are decreased in sequence; the gear comprises: a 0-stage gear for characterizing the shutdown of the outdoor fan, and a 1-stage gear, a 2-stage gear, a 3-stage gear, a 4-stage gear, a 5-stage gear, a 6-stage gear and a 7-stage gear with gradually increased rotating speed; the method comprises the following steps of determining a target gear according to a condensation temperature and a preset temperature threshold, wherein the steps comprise: if the condensation temperature is greater than the first temperature threshold value, determining that the target gear is a 7-level gear; or if the condensation temperature is not greater than the first temperature threshold and is greater than the second temperature threshold, determining that the target gear is a 6-stage gear; or if the condensation temperature is not greater than the second temperature threshold and is greater than the third temperature threshold, determining that the target gear is a gear after the current gear is shifted by one gear, and the maximum gear is shifted to 6-level gear; or if the condensation temperature is not greater than the third temperature threshold and not less than the fourth temperature threshold, determining that the target gear is the current gear; or if the condensation temperature is smaller than the fourth temperature threshold and not smaller than the fifth temperature threshold, determining that the target gear is a gear obtained by reducing the current gear by one gear, and reducing the target gear to a level 1 gear at minimum; or if the condensation temperature is smaller than the fifth temperature threshold and not smaller than the sixth temperature threshold, determining that the target gear is a 0-level gear.
Preferably, the above method further comprises: and if the condensation temperature is less than the sixth temperature threshold, controlling the outdoor fan to be lowered to a 0-level gear from the current gear, and controlling the compressor of the inverter air conditioner to stop running after the condensation temperature lasts for a preset time.
In a second aspect, an embodiment of the present invention further provides an outdoor fan control device, where the outdoor fan is configured with multiple gears, and each gear corresponds to a rotation speed value, the device includes: the temperature acquisition module is used for acquiring the indoor environment temperature and the outdoor environment temperature in real time if the outdoor fan is started to operate; the first correction module is used for acquiring the operation mode of the variable frequency air conditioner and correcting the maximum rotating speed value of the outdoor fan according to the operation mode, the indoor environment temperature and the outdoor environment temperature to obtain a maximum rotating speed correction value; the maximum rotating speed value is a rotating speed value corresponding to the maximum gear in the multiple gears; the operation mode comprises a cooling operation mode and a heating operation mode; the second correction module is used for calculating a difference value between the highest rotation speed correction value and the highest rotation speed value, and correcting the rotation speed values corresponding to the rest gears according to the difference value to obtain the rotation speed correction values corresponding to the rest gears; the gear determining module is used for acquiring the condensation temperature, determining a target gear according to the condensation temperature and a preset temperature threshold, and controlling the outdoor fan to operate according to a target rotating speed correction value corresponding to the target gear; the condensation temperature is used for representing the temperature of the middle part of a condenser in the variable frequency air conditioner.
In a third aspect, an embodiment of the present invention further provides an inverter air conditioner, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the steps of the method in the first aspect.
In a fourth aspect, the embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to perform the steps of the method in the first aspect.
The embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides an outdoor fan control method, an outdoor fan control device and a variable frequency air conditioner, wherein firstly, the highest rotating speed value of an outdoor fan is corrected according to the running mode of the variable frequency air conditioner, the indoor environment temperature and the outdoor environment temperature to obtain the highest rotating speed correction value; then, correcting the rotating speed value corresponding to each remaining gear according to the difference value between the highest rotating speed correction value and the highest rotating speed value to obtain the rotating speed correction value corresponding to each remaining gear; and determining a target gear according to the condensation temperature and a preset temperature threshold, and controlling the outdoor fan to operate according to a target rotating speed correction value corresponding to the target gear. In the control mode, the rotating speed value of each gear of the outdoor fan is corrected through the indoor environment temperature and the outdoor environment temperature, and meanwhile, the differential control under different refrigeration and heating scenes is considered, so that the intelligent and accurate control of the outdoor fan is realized, and the running reliability of the system is ensured; and the comfort and the energy-saving performance under different scenes of refrigeration and heating are also considered, and the method has better practical value.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of an inverter air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart of an outdoor fan control method according to an embodiment of the present invention;
fig. 3 is a schematic view illustrating gear control of an outdoor fan according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an outdoor fan control device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another inverter air conditioner according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
For the convenience of understanding the present embodiment, a detailed description will be given below of an outdoor fan control method according to an embodiment of the present invention. As shown in fig. 1, the inverter air conditioner includes, but is not limited to, a compressor (also referred to as an inverter compressor) 101, an oil separator 102, a four-way valve 103, a condenser 104, an evaporator 105, a low-pressure stop valve 106, a high-pressure stop valve 107, a centrifugal fan 108, a gas-liquid separator 109, a capillary tube 110, a high-pressure sensor 111, a low-pressure sensor 112, an exhaust gas temperature sensor 113, an air return temperature sensor 114, an outdoor temperature sensor 115, an indoor temperature sensor 116, an inner pan temperature sensor 117, an outer pan temperature sensor 118, a condenser middle temperature sensor 119, an outdoor fan 120, and the like.
Based on the variable frequency air conditioner, the embodiment of the invention provides an outdoor fan control method; in practical application, the gears of the outdoor fan are usually divided into a high-speed gear, a medium-speed gear and a low-speed gear, and each gear is further divided into a plurality of sub-gears in order to more accurately control the outdoor fan, so that the gears of the outdoor unit can be divided into a 1-level gear, a 2-level gear and a 3-level gear representing the low-speed gear, a 4-level gear and a 5-level gear representing the medium-speed gear, a 6-level gear and a 7-level gear representing the high-speed gear and a 0-level gear representing the halt of the outdoor fan, and the rotating speed value corresponding to each gear is determined according to a normal-temperature rated working condition and is pre-stored in the controller.
As shown in fig. 2, the method comprises the steps of:
step S202, if the outdoor fan is started to operate, acquiring the indoor environment temperature and the outdoor environment temperature in real time;
specifically, when the variable frequency air conditioner starts to operate, the outdoor fan is started to operate, and at the moment, the controller triggers the acquisition device to work, such as triggering the outdoor temperature sensor to acquire the outdoor environment temperature T Outer ring Triggering indoor temperature sensor to acquire indoor environment temperature T Inner ring Triggering a temperature sensor in the middle of the condenser to acquire condensing temperature Tcm and the like, wherein in practical application, the outdoor environment temperature T Outer ring And indoor ambient temperature T Inner ring The condensing temperature Tcm is preferably acquired in real time, periodically acquired every 3min after the compressor continuously operates for 5min, and also can be acquired in real time, and the acquisition mode of each temperature can be specifically set according to the actual situation.
Step S204, acquiring an operation mode of the variable frequency air conditioner, and correcting the maximum rotating speed value of the outdoor fan according to the operation mode, the indoor environment temperature and the outdoor environment temperature to obtain a maximum rotating speed correction value;
the maximum rotating speed value is a rotating speed value corresponding to the maximum gear in the gears, and if the maximum gear is a 7-level gear, the maximum rotating speed value is a rotating speed value corresponding to the 7-level gear; the operation modes comprise a refrigeration operation mode corresponding to a high-temperature scene and a heating operation mode corresponding to a low-temperature scene, and the rotating speed value corresponding to each gear is determined based on a normal-temperature rated working condition, namely corresponding to the normal-temperature scene, so that the rotating speed values of the gears under the high-temperature scene and the low-temperature scene are corrected, the outdoor fan is intelligently and accurately controlled in a differentiation mode under different scenes of high temperature, normal temperature and low temperature, the operation reliability of the system is ensured, and the comfort and the energy conservation performance under different scenes of refrigeration and heating are also considered.
Specifically, the process of correcting the maximum rotation speed value of the outdoor fan according to the operation mode, the indoor environment temperature and the outdoor environment temperature is as follows: firstly, determining a corresponding correction coefficient according to the operation mode of the variable frequency air conditioner; wherein the correction coefficient comprises a refrigeration correction coefficient k1 and a heating correction coefficient k2; then, based on the correction coefficient, the maximum rotating speed value of the outdoor fan is corrected according to the indoor environment temperature and the outdoor environment temperature to obtain a maximum rotating speed correction value, so that the maximum rotating speed value of the outdoor fan is corrected respectively through the correction coefficients in different scenes, differential control of the maximum rotating speed value of the outdoor fan is achieved, the control of the outdoor fan is enabled to be more in line with the corresponding scenes, and the accuracy of control of the outdoor fan is improved.
In one possible embodiment, if the correction factor is a refrigeration correction factor k1, the maximum rotation speed value is corrected according to the following formula:
F maximum correction =F Highest point of the design +(F Highest point of the design /k1)*(T Outer ring /35-1)*(T Inner ring /27) (1)
Wherein, F Maximum correction Indicating the corrected value of the maximum speed, F Highest point of the design Represents the maximum rotation speed value, k1 represents the refrigeration correction coefficient, T Inner ring Indicating the indoor ambient temperature, T Outer ring Indicating the outdoor ambient temperature.
In practical application, F Maximum correction Taking the integer part, F Highest point of the design For constant value, i.e. guaranteed when testing rated coolingThe value range of the experimental test value with optimal capacity and energy efficiency is 700 r/min-1000 r/min, and is related to the performance parameters of the direct current motor of the outdoor fan. The refrigeration correction coefficient k1 is a constant value [1.0,3.0 ]]The 1-bit decimal fraction is reserved and is in nominal relation with the cold quantity, such as 18K, 24K, 36K and the like, generally, the larger the cold quantity is, the F is Maximum correction The larger the requirement is to improve the refrigeration effect, namely k1 is a small value; 27 and 35 are respectively the indoor ambient temperature and the outdoor ambient temperature under the rated refrigeration working condition, and are set for the national standard specified test working condition, so that the maximum rotating speed value F under the normal temperature scene is obtained according to the formula (1) Highest point of the design Updating to F in high temperature scene Maximum correction
In addition, (1) when cooling, the indoor ambient temperature T Inner ring The higher the refrigerating capacity is, the more the required refrigerating capacity is, the higher the rotating speed of the outdoor fan is, the better the refrigerating capacity is, and the comfort is improved; (2) when cooling, the outdoor ambient temperature T Outer ring >35℃,T Outer ring The higher the temperature is, the lower the temperature difference between the condenser at the outer side and the air is, the worse the heat exchange quantity is, but at the moment, a user needs more refrigerating quantity, the rotating speed of an outdoor fan is improved, the heat exchange effect of the condenser is enhanced, the outlet temperature of the condenser is further reduced, the high-temperature refrigerating capacity is improved, and the comfort of the variable frequency air conditioner is improved; (3) when cooling, the outdoor ambient temperature T Outer ring <35℃,T Outer ring The lower the temperature is, the smaller the refrigerating capacity required by a user is, the more energy-saving is required at the moment, the rotating speed of an outdoor fan is reduced, and on one hand, the refrigerating output effect in a low-load state is favorably reduced, and the output surplus is avoided; on the other hand because outdoor fan rotational speed reduces, outside condenser heat transfer effect worsens to make system's refrigerant condensation pressure improve, thereby when low temperature refrigeration state, inverter air conditioner can be in lower low temperature refrigeration lower limit operating mode normal operating, because low temperature refrigeration state pressure can cause the compressor oil return, return bad condition, thereby be favorable to improving and promote the operational reliability lower limit.
In another possible embodiment, if the correction factor is the heating correction factor k2, the maximum rotation speed value is corrected according to the following formula:
F maximum correction =F Highest point of the design +(F Highest point of the design /k2)*(1-T Outer ring /7)*(20/ T Inner ring ) (2)
Wherein, F Maximum correction Indicating a maximum speed correction value, F Highest point of the design Representing the maximum rotation speed value, k2 representing the heating correction coefficient, T Inner ring Indicating the indoor ambient temperature, T Outer ring Representing the outdoor ambient temperature.
In the same way, F Maximum correction Taking the integral part, the heating correction coefficient k2 is a constant value [7.0, 9.0']The 1-bit decimal fraction is reserved and is in nominal relation with the cold quantity, such as 18K, 24K, 36K and the like, generally, the larger the cold quantity is, the F is Maximum correction The larger the heating effect needs to be, the smaller the k2 value is; 20 and 7 are respectively the indoor environment temperature and the outdoor environment temperature under the rated heating working condition, and are fixed values for the national standard specified test working condition, so that the maximum rotating speed value F under the normal temperature scene is obtained according to the formula (2) Highest point of the design Updating to F in low-temperature scene Maximum correction
In addition, (1) when heating, the indoor ambient temperature T Inner ring The higher the temperature is, the less heating quantity is required, the reduction of the rotating speed of the outdoor fan is beneficial to reducing the heating capacity, and the comfort and the energy conservation are improved; (2) when heating, the outdoor ambient temperature T Outer ring The outer heat exchanger is an evaporator T at the temperature of more than 7 DEG C Outer ring The higher the temperature difference between the evaporator and the air is, the higher the heat exchange effect of the evaporator is, the less the requirement of a user on heating capacity is, the rotating speed of an outdoor fan is reduced, the heating output effect is favorably reduced, the output surplus is avoided, and the energy saving performance and the comfort of the variable frequency air conditioner are improved; (3) when heating, the outdoor ambient temperature T Outer ring <7℃,T Outer ring The lower the temperature is, the greater the demand of the user on the heating capacity is shown, and the improvement of the rotating speed of the outdoor fan is beneficial to improving the heat exchange effect between the outer evaporator and the air, so that the low-temperature heating capacity is improved, and the comfort of the user is improved.
Therefore, the highest rotating speed value of the outdoor fan is corrected through the refrigeration correction coefficient k1 corresponding to the high-temperature scene and the refrigeration correction coefficient k2 corresponding to the low-temperature scene, intelligent differential control of the outdoor fan under different scenes of high temperature, normal temperature and low temperature is achieved, and the control accuracy of the outdoor fan is improved.
Step S206, calculating a difference value between the highest rotation speed correction value and the highest rotation speed value, and correcting the rotation speed value corresponding to each of the rest gears according to the difference value to obtain the rotation speed correction value corresponding to each of the rest gears;
specifically, the rotating speed value corresponding to each of the remaining gears is corrected according to the following formula:
Fn correction =Fn Initial +(F Maximum correction -F Highest point of the design ) (3)
Wherein Fn Correction Indicating a correction value for the rotational speed, fn, corresponding to any of the remaining gear positions Initiation of Indicates the corresponding rotating speed value of the gear, F Maximum correction Indicating a maximum speed correction value, F Highest point of the design Representing the highest rotational speed value. In practical application, the gear of the outdoor fan comprises: a 0-level gear for representing the shutdown of the outdoor fan, and a 1-stage gear, a 2-stage gear, a 3-stage gear, a 4-stage gear, a 5-stage gear, a 6-stage gear and a 7-stage gear with gradually increased rotating speed; since the maximum rotation speed value corresponding to the 7-stage gear can be corrected according to the formula (1) or the formula (2), the rotation speed values of the rest 1-6 stages are respectively corrected according to the formula (3), namely n in the formula (3) is an interval value smaller than the maximum gear, and preferably [1,6 ]]。
And S208, acquiring the condensation temperature, determining a target gear according to the condensation temperature and a preset temperature threshold, and controlling the outdoor fan to operate according to a target rotating speed correction value corresponding to the target gear.
The condensation temperature Tcm is used for representing the temperature of the middle part of a condenser in the variable frequency air conditioner, namely the temperature value converted by the simulated condensation pressure. The preset temperature threshold comprises a first temperature threshold, a second temperature threshold, a third temperature threshold, a fourth temperature threshold, a fifth temperature threshold and a sixth temperature threshold which are sequentially reduced; preferably, the first temperature threshold is 46 ℃, the second temperature threshold is 43 ℃, the third temperature threshold is 40 ℃, the fourth temperature threshold is 34 ℃, the fifth temperature threshold is 27 ℃, and the sixth temperature threshold is 25 ℃, and specifically, the values of the temperature thresholds can be adjusted according to actual conditions.
Specifically, as shown in fig. 3, the process of determining the target gear according to the condensing temperature and the preset temperature threshold is as follows:
(1) If the condensation temperature is greater than the first temperature threshold value, determining that the target gear is a 7-level gear; namely, when Tcm is higher than 46 ℃, the outdoor fan is increased to 7-level gear from the current gear;
(2) If the condensation temperature is not greater than the first temperature threshold and is greater than the second temperature threshold, determining that the target gear is a 6-level gear; namely when the temperature is more than 43 ℃ and is less than or equal to 46 ℃, the outdoor fan is increased or reduced to 6-level gear from the current gear;
(3) If the condensation temperature is not greater than the second temperature threshold and is greater than the third temperature threshold, determining that the target gear is a gear after the current gear is shifted by one gear, and the maximum gear is shifted to 6-level gear; when the temperature is higher than 40 ℃ and less than or equal to 43 ℃, the outdoor fan is shifted up to one gear from the current gear, and the outdoor fan can be shifted to 6-level gears to the maximum extent;
(4) If the condensation temperature is not greater than the third temperature threshold and not less than the fourth temperature threshold, determining that the target gear is the current gear; namely when the temperature is more than or equal to 34 ℃ and less than or equal to 40 ℃, the outdoor fan keeps the current gear unchanged;
(5) If the condensation temperature is smaller than a fourth temperature threshold and not smaller than a fifth temperature threshold, determining that the target gear is a gear obtained by reducing the current gear by one gear, and reducing the target gear to a level 1 gear at minimum; namely, when the temperature is more than or equal to 27 ℃ and less than 34 ℃, the outdoor fan is lowered to one gear from the current gear, and the minimum speed is lowered to the 1-level gear;
(6) If the condensation temperature is smaller than a fifth temperature threshold and not smaller than a sixth temperature threshold, determining that the target gear is a 0-level gear; namely when the temperature is more than or equal to 25 ℃ and less than 27 ℃, controlling the outdoor fan to lower the 0-level gear after the current gear is kept for 6 min;
(7) If the condensation temperature is smaller than the sixth temperature threshold value, namely when Tcm is smaller than 25 ℃, the outdoor fan is controlled to be lowered to a 0-level gear from the current gear, and after the duration is preset for 10min, the compressor of the variable frequency air conditioner is controlled to stop running.
In addition, in practical application, when the existing outdoor fan is restarted every time, the outdoor fan is controlled to firstly operate to the highest rotating speed and then reduce to the target rotating speed within 2 s. Therefore, in the embodiment of the invention, in order to reduce the complexity of the control logic in the starting stage of the outdoor fan, after the outdoor fan is stopped, the control logic is consistent with the existing control logic when the outdoor fan is restarted, for example, when the condensing temperature Tcm is greater than 30 ℃, the controller also controls the outdoor fan to be firstly increased to the 7-stage gear, and the outdoor fan enters the 1-stage gear after being kept for 2 s.
According to the control method of the outdoor fan, the rotating speed values of all gears of the outdoor fan are corrected through the indoor environment temperature and the outdoor environment temperature, meanwhile, the differential control under different refrigeration and heating scenes is considered, the intelligent and accurate control of the outdoor fan is achieved, and the operation reliability of the system is guaranteed; and the comfort and the energy-saving performance under different scenes of refrigeration and heating are also considered, and the method has better practical value.
This is illustrated here for ease of understanding. The method comprises the following specific steps:
(1) During cooling operation, T Inner ring =32℃,T Outer ring =43℃,F Highest point of the design =800r/min, 24K cold machine type, K1=2, and maximum rotation speed correction value F corresponding to the highest gear of the outdoor fan Maximum correction =F Highest point of the design +(F Highest point of the design /2)*(T Outer ring /35-1)*(T Inner ring The gear position of each stage below the highest gear is operated according to a rotation speed correction value obtained by adding 908-800=108r/min to the initial rotation speed, =800+400 (43/35-1) = 32/27) =908 r/min;
(2) In heating operation, T Inner ring =15℃,T Outer ring =2℃,F Highest point of the design =800r/min, 24K cold machine type, K1=8, and maximum rotation speed correction value F corresponding to the highest gear of the outdoor fan Maximum correction =F Highest point of the design +(F Highest point of the design /8)*(1-T Outer ring /7)*(20/T Inner ring ) And =800+100 (1-2/7) = 20/15) =895r/min, and each gear below the highest gear operates according to a rotation speed correction value obtained by adding 895-800=95r/min to the initial rotation speed.
In summary, the outdoor fan control method provided by the embodiment of the invention utilizes the existing protection device to obtain the outdoor environment temperature and the indoor environment temperature in real time without increasing the cost, and combines the operation mode of the variable frequency air conditioner to differentially and intelligently control the outdoor fan, so that the intelligent and precise control of the outdoor fan is realized, the system operation reliability is ensured, the comfortableness and the energy conservation of the outdoor fan control under different scenes of high temperature, normal temperature and low temperature are also considered, the comfortableness and the experience degree of the user are improved, and the practical value is better.
Corresponding to the above method embodiment, an embodiment of the present invention further provides an outdoor fan control device, where the outdoor fan is configured with multiple gears, and each gear corresponds to a rotation speed value, as shown in fig. 4, the device includes: a temperature acquisition module 41, a first correction module 42, a second correction module 43, and a gear determination module 44; the functions of each module are as follows:
the temperature obtaining module 41 is configured to obtain an indoor ambient temperature and an outdoor ambient temperature in real time if the outdoor fan is started to operate;
the first correction module 42 is configured to obtain an operation mode of the inverter air conditioner, and correct the maximum rotation speed value of the outdoor fan according to the operation mode, the indoor environment temperature, and the outdoor environment temperature to obtain a maximum rotation speed correction value; the maximum rotating speed value is a rotating speed value corresponding to the maximum gear in the multiple gears; the operation modes comprise a cooling operation mode and a heating operation mode;
the second correction module 43 is configured to calculate a difference between the highest rotation speed correction value and the highest rotation speed value, and correct the rotation speed values corresponding to the remaining gears according to the difference to obtain rotation speed correction values corresponding to the remaining gears;
the gear determining module 44 is configured to obtain a condensation temperature, determine a target gear according to the condensation temperature and a preset temperature threshold, and control the outdoor fan to operate according to a target rotation speed correction value corresponding to the target gear; the condensation temperature is used for representing the temperature of the middle part of a condenser in the variable frequency air conditioner.
According to the control device of the outdoor fan, provided by the embodiment of the invention, the rotating speed value of each gear of the outdoor fan is corrected through the indoor environment temperature and the outdoor environment temperature, and meanwhile, the differential control under different refrigeration and heating scenes is considered, so that the intelligent and accurate control of the outdoor fan is realized, and the operation reliability of a system is ensured; and the comfort and the energy-saving performance under different scenes of refrigeration and heating are also considered, and the method has better practical value.
Preferably, the first modification module 42 is further configured to: determining a corresponding correction coefficient according to the operation mode; wherein, the correction coefficient comprises a refrigeration correction coefficient and a heating correction coefficient; and correcting the maximum rotating speed value of the outdoor fan according to the indoor environment temperature and the outdoor environment temperature based on the correction coefficient to obtain a maximum rotating speed correction value.
Preferably, the correcting the maximum rotation speed value of the outdoor fan according to the indoor environment temperature and the outdoor environment temperature based on the correction coefficient includes: if the correction coefficient is a refrigeration correction coefficient, correcting the maximum rotating speed value according to the following formula: f Maximum correction =F Highest point of the design +(F Highest point of the design /k1)*(T Outer ring /35-1)*(T Inner ring /27); wherein, F Maximum correction Indicating a maximum speed correction value, F Highest point of the design Representing the maximum rotation speed value, k1 representing the refrigeration correction factor, T Inner ring Indicating the indoor ambient temperature, T Outer ring Representing the outdoor ambient temperature.
Preferably, the correcting the maximum rotation speed value of the outdoor fan according to the indoor environment temperature and the outdoor environment temperature based on the correction coefficient includes: if the correction coefficient is a heating correction coefficient, correcting the maximum rotating speed value according to the following formula: f Maximum correction =F Highest point of the design +(F Highest point of the design /k2)*(1-T Outer ring /7)*(20/T Inner ring ) (ii) a Wherein, F Maximum correction Indicating the corrected value of the maximum speed, F Highest point of the design Denotes the maximum rotation speed value, k2 denotes the heating correction coefficient, T Inner ring Indicating the indoor ambient temperature, T Outer ring Indicating the outdoor ambient temperature.
Preferably, the second modification module 43 is further configured to: correcting the rotating speed value corresponding to each of the rest gears according to the following formula: fn Correction =Fn Initial +(F Maximum correction -F Highest point of the design ) (ii) a Wherein Fn Correction Representing the corresponding rotation speed correction of any gear in the rest gearsValue Fn Initiation of Indicates the corresponding rotating speed value of the gear, F Maximum correction Indicating the corrected value of the maximum speed, F Highest point of the design Representing the highest rotational speed value.
Preferably, the preset temperature threshold includes a first temperature threshold, a second temperature threshold, a third temperature threshold, a fourth temperature threshold, a fifth temperature threshold and a sixth temperature threshold which are decreased in sequence; the gear comprises: a 0-level gear for representing the shutdown of the outdoor fan, and a 1-stage gear, a 2-stage gear, a 3-stage gear, a 4-stage gear, a 5-stage gear, a 6-stage gear and a 7-stage gear with gradually increased rotating speed; determining a target gear according to the condensation temperature and a preset temperature threshold, wherein the method comprises the following steps: if the condensation temperature is greater than the first temperature threshold value, determining that the target gear is a 7-level gear; or if the condensation temperature is not greater than the first temperature threshold and is greater than the second temperature threshold, determining that the target gear is a 6-stage gear; or if the condensation temperature is not greater than the second temperature threshold and is greater than the third temperature threshold, determining that the target gear is a gear after the current gear is shifted by one gear, and shifting to 6-level gear at most; or if the condensation temperature is not greater than the third temperature threshold and not less than the fourth temperature threshold, determining that the target gear is the current gear; or if the condensation temperature is less than the fourth temperature threshold and not less than the fifth temperature threshold, determining that the target gear is a gear obtained by reducing the current gear by one gear, and reducing the target gear to a level 1 gear at least; or if the condensation temperature is smaller than the fifth temperature threshold and not smaller than the sixth temperature threshold, determining that the target gear is a 0-level gear.
Preferably, the above apparatus further comprises: and if the condensation temperature is less than the sixth temperature threshold, controlling the outdoor fan to be lowered to a 0-level gear from the current gear, and controlling the compressor of the variable-frequency air conditioner to stop running after the preset duration is continued.
The outdoor fan control device provided by the embodiment of the invention has the same technical characteristics as the outdoor fan control method provided by the embodiment, so that the same technical problems can be solved, and the same technical effects are achieved.
The embodiment of the invention also provides a variable frequency air conditioner which comprises a processor and a memory, wherein the memory stores machine executable instructions capable of being executed by the processor, and the processor executes the machine executable instructions to realize the outdoor fan control method.
Referring to fig. 5, the inverter air conditioner includes a processor 100 and a memory 101, the memory 101 stores machine executable instructions capable of being executed by the processor 100, and the processor 100 executes the machine executable instructions to implement the outdoor fan control method.
Further, the inverter air conditioner shown in fig. 5 further includes a bus 102 and a communication interface 103, and the processor 100, the communication interface 103 and the memory 101 are connected through the bus 102.
The Memory 101 may include a high-speed Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface 103 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, and the like may be used. The bus 102 may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, an EISA (Enhanced Industry Standard Architecture) bus, or the like. The above-mentioned bus may be classified into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one double-headed arrow is shown in FIG. 5, but this does not indicate only one bus or one type of bus.
Processor 100 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 100. The Processor 100 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in ram, flash, rom, prom, or eprom, registers, etc. as is well known in the art. The storage medium is located in the memory 101, and the processor 100 reads the information in the memory 101 and completes the steps of the method of the foregoing embodiment in combination with the hardware thereof.
The present embodiments also provide a machine-readable storage medium having stored thereon machine-executable instructions that, when invoked and executed by a processor, cause the processor to implement the above-described outdoor fan control method.
The method and the device for controlling the outdoor fan and the computer program product of the inverter air conditioner provided by the embodiment of the invention comprise a computer readable storage medium for storing program codes, wherein instructions included in the program codes can be used for executing the method in the previous method embodiment, and specific implementation can refer to the method embodiment, which is not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus described above may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention or a part thereof which substantially contributes to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An outdoor fan control method, wherein the outdoor fan is configured with a plurality of gears, each gear corresponding to a rotation speed value, the method comprising:
if the outdoor fan is started to operate, acquiring indoor environment temperature and outdoor environment temperature in real time;
acquiring an operation mode of the variable frequency air conditioner, and correcting the maximum rotating speed value of the outdoor fan according to the operation mode, the indoor environment temperature and the outdoor environment temperature to obtain a maximum rotating speed correction value; the maximum rotating speed value is a rotating speed value corresponding to the maximum gear in the gears; the operation modes comprise a cooling operation mode and a heating operation mode;
calculating a difference value between the highest rotation speed correction value and the highest rotation speed value, and correcting the rotation speed value corresponding to each of the rest gears according to the difference value to obtain the rotation speed correction value corresponding to each of the rest gears;
acquiring a condensation temperature, determining a target gear according to the condensation temperature and a preset temperature threshold, and controlling the outdoor fan to operate according to a target rotating speed correction value corresponding to the target gear; and the condensation temperature is used for representing the temperature of the middle part of a condenser in the variable frequency air conditioner.
2. The method of claim 1, wherein the step of modifying the maximum speed value of the outdoor fan based on the operating mode, the indoor ambient temperature, and the outdoor ambient temperature comprises:
determining a corresponding correction coefficient according to the operation mode; the correction coefficient comprises a refrigeration correction coefficient and a heating correction coefficient;
and correcting the maximum rotating speed value of the outdoor fan according to the indoor environment temperature and the outdoor environment temperature based on the correction coefficient to obtain a maximum rotating speed correction value.
3. The method of claim 2, wherein the step of correcting the maximum rotation speed value of the outdoor fan according to the indoor ambient temperature and the outdoor ambient temperature based on the correction coefficient comprises:
if the correction coefficient is the refrigeration correction coefficient, correcting the maximum rotating speed value according to the following formula:
F maximum correction =F Highest point of the design +(F Highest point of the design /k1)*(T Outer ring /35-1)*(T Inner ring /27)
Wherein, F Maximum correction Indicating said maximum speed correction value, F Highest point of the design Representing the maximum rotation speed value, k1 representing the refrigeration correction coefficient, T Inner ring Representing the indoor ambient temperature, T Outer ring Representing the outdoor ambient temperature.
4. The method of claim 2, wherein the step of correcting the maximum rotation speed value of the outdoor fan according to the indoor ambient temperature and the outdoor ambient temperature based on the correction coefficient comprises:
if the correction coefficient is the heating correction coefficient, correcting the maximum rotation speed value according to the following formula:
F maximum correction =F Highest point of the design +(F Highest point of the design /k2)*(1-T Outer ring /7)*(20/T Inner ring )
Wherein, F Maximum correction Indicating said maximum speed correction value, F Highest point of the design Represents the maximum rotation speed value, k2 represents the heating correction coefficient, T Inner ring To indicate the roomAmbient temperature, T Outer ring Representing the outdoor ambient temperature.
5. The method according to claim 3 or 4, wherein the step of calculating a difference between the maximum rotation speed correction value and the maximum rotation speed value and correcting the rotation speed values corresponding to the remaining respective gear positions based on the difference comprises:
and correcting the rotating speed value corresponding to each rest gear according to the following formula:
Fn correction =Fn Initiation of +(F Maximum correction -F Highest point of the design )
Wherein, fn Correction Indicating a correction value for the rotational speed, fn, for any of the remaining gear positions Initial Indicating the speed value, F, corresponding to that gear Maximum correction Indicating said maximum speed correction value, F Highest point of the design Representing the maximum rotation speed value.
6. The method of claim 1, wherein the preset temperature thresholds comprise a first temperature threshold, a second temperature threshold, a third temperature threshold, a fourth temperature threshold, a fifth temperature threshold, and a sixth temperature threshold that decrease in sequence; the gear stage includes: the gear system comprises a 0-stage gear for representing the shutdown of the outdoor fan, and a 1-stage gear, a 2-stage gear, a 3-stage gear, a 4-stage gear, a 5-stage gear, a 6-stage gear and a 7-stage gear which are gradually increased in rotating speed;
the step of determining the target gear according to the condensation temperature and the preset temperature threshold comprises the following steps:
if the condensation temperature is greater than the first temperature threshold, determining that the target gear is the 7-stage gear; alternatively, the first and second electrodes may be,
if the condensation temperature is not greater than the first temperature threshold and is greater than the second temperature threshold, determining that the target gear is the 6-stage gear; alternatively, the first and second liquid crystal display panels may be,
if the condensation temperature is not greater than the second temperature threshold and is greater than the third temperature threshold, determining that the target gear is a gear after the current gear is shifted by one gear, and the maximum gear is shifted to the 6-level gear; alternatively, the first and second liquid crystal display panels may be,
if the condensation temperature is not greater than the third temperature threshold and not less than the fourth temperature threshold, determining that the target gear is the current gear; alternatively, the first and second liquid crystal display panels may be,
if the condensation temperature is smaller than the fourth temperature threshold and not smaller than the fifth temperature threshold, determining that the target gear is a gear obtained by reducing the current gear by one gear, and reducing the target gear to the 1-level gear at least; alternatively, the first and second electrodes may be,
and if the condensation temperature is smaller than the fifth temperature threshold and not smaller than the sixth temperature threshold, determining that the target gear is the 0-stage gear.
7. The method of claim 6, further comprising:
and if the condensation temperature is smaller than the sixth temperature threshold, controlling the outdoor fan to be lowered to the 0-level gear from the current gear, and controlling a compressor of the variable-frequency air conditioner to stop running after the current gear is continuously kept for a preset time.
8. The utility model provides an outdoor fan controlling means which characterized in that, outdoor fan disposes a plurality of gears, every the gear corresponds to there is the rotational speed value, the device includes:
the temperature acquisition module is used for acquiring indoor environment temperature and outdoor environment temperature in real time if the outdoor fan is started to operate;
the first correction module is used for acquiring an operation mode of the variable frequency air conditioner and correcting the maximum rotating speed value of the outdoor fan according to the operation mode, the indoor environment temperature and the outdoor environment temperature to obtain a maximum rotating speed correction value; the maximum rotating speed value is a rotating speed value corresponding to the maximum gear in the gears; the operation modes comprise a cooling operation mode and a heating operation mode;
the second correction module is used for calculating a difference value between the highest rotation speed correction value and the highest rotation speed value, and correcting the rotation speed values corresponding to the rest gears according to the difference value to obtain the rotation speed correction values corresponding to the rest gears;
the gear determining module is used for acquiring the condensation temperature, determining a target gear according to the condensation temperature and a preset temperature threshold, and controlling the outdoor fan to operate according to a target rotating speed correction value corresponding to the target gear; the condensation temperature is used for representing the temperature of the middle part of a condenser in the variable frequency air conditioner.
9. An inverter air conditioner comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the method of any one of claims 1-7 when executing the computer program.
10. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, is adapted to carry out the steps of the method according to any of the claims 1-7.
CN202211595072.6A 2022-12-13 2022-12-13 Outdoor fan control method and device and variable frequency air conditioner Pending CN115875825A (en)

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