CN113776175A - Control method and device of air conditioner, air conditioner and storage medium - Google Patents
Control method and device of air conditioner, air conditioner and storage medium Download PDFInfo
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- CN113776175A CN113776175A CN202111112351.8A CN202111112351A CN113776175A CN 113776175 A CN113776175 A CN 113776175A CN 202111112351 A CN202111112351 A CN 202111112351A CN 113776175 A CN113776175 A CN 113776175A
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- air conditioner
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses a control method of an air conditioner, which comprises the steps of acquiring the superheat degree of the oil temperature of a compressor of the air conditioner when the air conditioner is in a starting state; if the oil temperature superheat degree of the compressor is smaller than a set superheat degree threshold value, acquiring the operating frequency of the compressor; and if the operating frequency is within the highest set frequency range of the compressor, reducing the current gear of a condenser fan of the air conditioner. The control method and device of the air conditioner, the air conditioner and the storage medium disclosed by the invention can improve the oil return efficiency aiming at different air conditioner operation conditions and reduce the probability of oil shortage operation of the compressor.
Description
Technical Field
The invention relates to the technical field of air conditioner control, in particular to a control method and device of an air conditioner, the air conditioner and a storage medium.
Background
Along with the improvement of people's standard of living for the air conditioner becomes domestic electrical apparatus commonly used, because the air conditioner can carry out temperature regulation, makes current temperature more suitable through the regulated temperature, thereby can effectively improve user's experience.
In the related technology, the refrigerating machine oil of the compressor has the functions of lubrication, cooling and sealing, a pump body part is in clearance fit with a micron order, the compressor can move at high speed through oil film lubrication, the running oil shortage of the compressor can cause abrasion of a moving surface, in order to detect the running state of the compressor oil shortage, the oil return amount of a compressor air suction port is generally controlled to reduce the probability of the running of the compressor oil shortage, but the specific reasons of the oil shortage of the compressor are different, the oil shortage conditions are various, only the oil shortage is detected, the corresponding treatment is not carried out according to the oil shortage condition, the treatment means is not pointed, the oil return amount is low, and the probability of the subsequent continuous running of the compressor oil shortage is high.
Disclosure of Invention
The embodiment of the invention provides a control method and device of an air conditioner, the air conditioner and a storage medium, which can effectively identify the oil shortage condition that whether a compressor is in a low oil temperature, the degree of superheat is high, and the oil discharge rate is high, and provide a processing means in a pertinence manner, so that the oil return efficiency is effectively improved, and the probability of oil shortage operation of a subsequent compressor is reduced.
A first aspect of an embodiment of the present invention provides a method for controlling an air conditioner, where the method includes:
acquiring the superheat degree of oil temperature of a compressor of an air conditioner when the air conditioner is in a starting state;
if the oil temperature superheat degree is smaller than a set superheat degree threshold value, acquiring the operating frequency of the compressor;
and if the operating frequency is within the highest set frequency range of the compressor, reducing the current gear of a condenser fan of the air conditioner.
Optionally, the obtaining of the superheat degree of the oil temperature of the compressor of the air conditioner includes:
acquiring the current oil level height of a compressor of the air conditioner; and if the current oil level height is smaller than the set oil level height, acquiring the superheat degree of the oil temperature of the compressor.
Optionally, after obtaining the current oil level height of the compressor of the air conditioner and before the current oil level height is smaller than the set oil level height, the method further includes:
and judging whether the current oil level height is smaller than the set oil level height.
Optionally, after determining whether the current oil level height is less than the set oil level height, the method further includes:
if the current oil level height is not smaller than the set oil level height, obtaining the engine oil kinematic viscosity of the compressor;
and if the engine oil kinematic viscosity is less than the set viscosity, starting an electric heating belt of the air conditioner to heat the refrigerant of the compressor.
Optionally, after determining whether the current oil level height is less than the set oil level height and before the oil temperature superheat degree of the compressor is less than a set superheat degree threshold, the method further includes:
if the current oil level height is smaller than the set oil level height, acquiring the current oil pool temperature and the current exhaust pressure of the compressor;
acquiring the superheat degree of the oil temperature according to the current oil pool temperature and the current exhaust pressure;
and judging whether the oil temperature superheat degree is smaller than the set superheat degree threshold value or not.
Optionally, after determining whether the oil temperature superheat degree is less than the set superheat degree threshold, the method further includes:
if the oil temperature superheat degree is not less than the set superheat degree threshold value, acquiring the current exhaust temperature of the compressor;
if the current exhaust temperature is lower than the set exhaust temperature, the running frequency of the compressor is increased;
and if the current exhaust temperature is greater than or equal to the set exhaust temperature, controlling the compressor to stop and giving an alarm.
Optionally, after obtaining the operating frequency of the compressor and before lowering the current gear of the condenser fan of the air conditioner, the method further includes:
and judging whether the operating frequency is in the highest set frequency range.
Optionally, after determining whether the operating frequency is within the highest set frequency range, the method further includes:
and if the operating frequency is not in the highest set frequency range of the compressor, increasing the operating frequency of the compressor.
A second aspect of the present invention provides a control apparatus for an air conditioner, comprising:
the oil level superheat degree acquisition unit is used for acquiring the oil temperature superheat degree of a compressor of the air conditioner when the air conditioner is in a starting state;
the operating frequency acquiring unit is used for acquiring the operating frequency of the compressor if the oil temperature superheat degree of the compressor is smaller than a set superheat degree threshold value;
and the control unit is used for reducing the current gear of a condenser fan of the air conditioner if the operating frequency is within the highest set frequency range of the compressor.
The third aspect of the present invention provides an air conditioner, which includes an air conditioner body, a memory and a compressor arranged in the air conditioner body, and one or more programs, where one or more programs are stored in the memory and configured to be executed by one or more processors to execute operation instructions included in the one or more programs for performing the control method of the air conditioner according to the first aspect.
A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the steps corresponding to the control method of an air conditioner as provided in the first aspect.
The above one or at least one technical solution in the embodiments of the present application has at least the following technical effects:
based on the technical scheme, when the air conditioner is in a starting state, firstly, whether the oil temperature superheat degree of the compressor is smaller than a set superheat degree threshold value or not is judged, and if the oil temperature superheat degree of the compressor is smaller than the set superheat degree threshold value, the situation that the oil temperature superheat degree is low and the oil discharge rate is high is judged, then, the operation frequency is judged to be not in the highest set frequency range of the compressor, and the operation frequency of the compressor is increased; when the running frequency of the compressor is within the highest set frequency range of the compressor, the air conditioner can be determined to be under an overload working condition, at the moment, the current gear of a condenser fan of the air conditioner is reduced, the current rotating speed of the condenser fan is reduced to the set rotating speed, the exhaust pressure can be effectively improved, on the basis that the exhaust pressure is improved, the solubility of a refrigerant in the refrigerating machine oil of the compressor can be effectively improved, the condition that the refrigerant quickly evaporates and foams to take away a large amount of refrigerating machine oil is reduced, the probability of the oil-deficient running of the compressor can be effectively reduced, the probability of abrasion caused by the oil-deficient running of the compressor is reduced, and the service life of the compressor can be effectively prolonged.
Moreover, the oil-shortage specific conditions can be effectively identified by analyzing the parameters of the compressor such as the oil temperature height, the oil temperature superheat degree, the exhaust temperature and the engine oil kinematic viscosity in a combined manner (overload, low-frequency oil shortage, high oil discharge rate of low oil temperature superheat degree and low temperature and low oil viscosity), and a targeted solution is provided, so that the oil return efficiency can be ensured, and the probability of the follow-up continuous oil-shortage operation of the compressor is reduced.
Drawings
Fig. 1 is a schematic flowchart of a control method of an air conditioner according to an embodiment of the present disclosure;
fig. 2a is a diagram of a processing step for determining a condition of a low oil temperature superheat degree and a high oil discharge rate according to an embodiment of the present application;
FIG. 2b is a diagram of a processing step for determining a low frequency oil shortage condition according to an embodiment of the present application;
FIG. 2c is a diagram of a processing procedure for determining an overload condition according to an embodiment of the present application;
FIG. 2d is a diagram of the processing steps for determining low temperature and low oil viscosity according to an embodiment of the present application;
fig. 3 is a block diagram of a control apparatus of an air conditioner according to an embodiment of the present disclosure.
Detailed Description
The main implementation principle, the specific implementation mode and the corresponding beneficial effects of the technical scheme of the embodiment of the present application are explained in detail with reference to the accompanying drawings.
Examples
Referring to fig. 1, an embodiment of the present application provides a method for controlling an air conditioner, including:
s101, acquiring the superheat degree of oil temperature of a compressor of an air conditioner when the air conditioner is in a starting state;
s102, if the oil temperature superheat degree of the compressor is smaller than a set superheat degree threshold value, acquiring the operating frequency of the compressor;
s103, if the operating frequency is within the highest set frequency range of the compressor, reducing the current gear of a condenser fan of the air conditioner. Namely, the current rotating speed of the condenser fan is reduced to a set rotating speed.
In the embodiments of the present specification, the air conditioner may be a cooling air conditioner, a heating air conditioner, a cooling and heating air conditioner, or the like.
In step S101, a current oil level of a compressor of the air conditioner may be obtained first; and if the current oil level height is smaller than the set oil level height, judging whether the oil temperature superheat degree of the compressor is smaller than a set superheat degree threshold value or not. Specifically, the current oil level height of the compressor within a set time after starting can be obtained. For example, after the air conditioner is started, the starting time of the air conditioner can be measured by a timer, and when the air conditioner runs for t seconds(s), the current oil level height of the compressor is obtained by an oil level sensor, and the oil level sensor can be a position sensor or a camera sensor.
In the embodiment of the present description, the setting time, i.e., t, may be set manually or by an air conditioner, and may be set according to actual requirements, and the value range of t may be, for example, 3 to 5 minutes (min), 1 to 4min, 4 to 7min, and the like. Preferably, the superheat threshold is set to 3-5 min.
After the current oil level is obtained, before step S102 is executed, it is further determined whether the current oil level is less than a set oil level, and whether the oil temperature superheat degree is less than a set superheat degree threshold, and step S102 is executed when the current oil level is less than the set oil level, and the oil temperature superheat degree of the compressor is less than the set superheat degree threshold.
In a specific implementation process, after judging whether the current oil level height is smaller than the set oil level height, if the current oil level height is smaller than the set oil level height, acquiring the current oil sump temperature and the current exhaust pressure of the compressor; acquiring the superheat degree of the oil temperature according to the current oil pool temperature and the current exhaust pressure; then judging whether the oil temperature superheat degree is smaller than a set superheat degree threshold value or not; if the oil temperature superheat degree is judged to be smaller than the set superheat degree threshold value, step S102 is executed.
In the embodiment of the present disclosure, the set oil level height is determined according to a minimum oil level height required by a compressor design, in this case, the set oil level height may also be the minimum oil level height, and a value range may also be determined according to the minimum oil level height, where the minimum oil level height in the value range is at an intermediate position, for example, the minimum oil level height H1 is represented, and the value range may be [ H1+ H2, H1-H2], where H2 may be set according to an actual situation, for example, 10 millimeters (mm), 20mm, 50mm, and the like, and after the value range is determined, a value may be randomly selected from the value range as the set oil level height, or the value range of the oil level may be directly used as the set oil level height, and the present disclosure is not particularly limited.
Specifically, after the current oil pool temperature and the current exhaust pressure of the compressor are obtained, when the oil temperature superheat degree is obtained according to the current oil pool temperature and the current exhaust pressure, a saturation temperature corresponding to the current exhaust pressure can be found from a preset pressure saturation temperature comparison table, and the oil temperature superheat degree is obtained according to the current oil pool temperature and the found saturation temperature.
Specifically, a first difference between the current oil pool temperature and the searched saturation temperature may be obtained as the oil temperature superheat degree, and after the first difference is obtained, a product of the first difference and a corresponding first weight may be used as the oil temperature superheat degree, where the first weight may be set manually or by an air conditioner, and may be set according to an actual requirement, and the first weight may be, for example, 0.9, 0.98, 0.85, and the like.
After the oil temperature superheat degree is acquired, it is determined whether or not the oil temperature superheat degree is smaller than a set superheat degree threshold value, and if so, step S102 is executed.
In the embodiment of the present specification, the set superheat threshold may be set manually or by an air conditioner, and may be set according to actual requirements, and the value range of the set superheat threshold may be, for example, 0 to 5 ℃, 1 to 4 ℃,0 to 6 ℃, and the like. Preferably, the superheat threshold is set at 0-5 ℃.
In step S102, the operating frequency of the compressor may be acquired by a frequency tester, which may be, for example, a multimeter, a vibration sensor, or the like.
Specifically, after the current oil level height is judged to be smaller than the set oil level height, whether the oil temperature superheat degree is smaller than the set superheat degree threshold value or not is triggered to be judged, if the oil temperature superheat degree is smaller than the condition that the compressor can be determined to be in the low oil temperature superheat degree and the high oil discharge rate, at the moment, the operation frequency is obtained, the actual working condition of the compressor is judged through the operation frequency, the actual working condition comprises the low-frequency operation working condition and the overload working condition, the oil discharge rate is reduced by adopting corresponding operation according to the actual working condition of the compressor, the oil level height of the compressor is improved, the oil return efficiency can be effectively improved on the basis of improving the oil level height of the compressor, the oil shortage operation probability of the compressor is reduced, the abrasion probability caused by the oil shortage operation of the compressor is reduced, and the service life of the compressor can be effectively prolonged.
After the operating frequency of the compressor is obtained and before step S103 is executed, it is further determined whether the operating frequency is within the highest set frequency range; if the operation frequency is determined to be within the highest set frequency range, executing step S103; and if the operation frequency is judged not to be in the highest set frequency range of the compressor, increasing the operation frequency of the compressor.
And reducing the current gear of the condenser fan of the air conditioner and reducing the current rotating speed of the condenser fan to the set rotating speed.
In practical applications, when the air conditioner is operated in certain environments (e.g., low temperature environments), the compressor-refrigerator oil may have a refrigerant dissolved therein. At the air conditioner starting stage, if the fan operation amount of wind of air conditioner is great, especially under the condition that the fan includes a plurality of fan units, a plurality of fan units operate simultaneously, the discharge pressure of air conditioner can reduce by a wide margin, can lead to the solubility of refrigerant to reduce in the compressor refrigerator oil like this for the refrigerant evaporates the foaming rapidly, takes away a large amount of refrigerant and machine oil, thereby leads to this compressor to have the risk of lack of oil, influences the reliability of this compressor operation.
In step S103, when it is determined that the operating frequency is within the highest set frequency range, it may be determined that the actual operating condition of the compressor is an overload operating condition, and at this time, the discharge pressure may be increased by reducing the current gear of the condenser fan of the air conditioner and reducing the current rotation speed of the condenser fan to the set rotation speed.
In this embodiment, the set rotation speed may be the lowest rotation speed or the second lowest rotation speed or the third lowest rotation speed of the fan, and the current rotation speed of the fan is reduced to reduce the probability that the rotation speed of the fan reduces the exhaust pressure. Furthermore, when the current gear of the condenser fan is reduced, the number of the reduced gears can be determined according to the actual situation, and if the current gear is higher, the number of the reduced gears can be larger; if the current gear is low, the number of the reduction gears can be smaller, for example, the gears of the condenser are 1, 2, 3, 4 and 5 gears from high to low in sequence, if the current gear is the 1 gear, the number of the reduction gears can be 2 or 3, and if the number of the reduction gears is 2, the actual gear after the current gear of the condenser fan is reduced is the 3 gear; if the current gear is the 3 gear, the number of the reduction gears can be 1 or 1, and if the number of the reduction gears is 1, the actual gear after the current gear of the condenser fan is reduced is the 4 gear.
Specifically, after the current gear of the condenser fan is reduced, the condensing temperature of the condenser is increased, the condensing pressure is also increased under the condition that the condensing temperature is increased, the exhaust pressure corresponds to the condensing temperature, and the exhaust pressure is also increased on the basis of the increase of the condensing pressure; and further through reducing the current rotational speed of fan to the rotational speed of setting for, reduce because the power of fan is too big impels the probability that the discharge pressure reduces the condition and appears, so, through reducing the current gear of the condenser fan of air conditioner, and reduce the current rotational speed of condenser fan to the rotational speed of setting for, can effectively improve the discharge pressure, on the basis that the discharge pressure improves, can effectively improve the solubility of refrigerant in the compressor refrigeration machine oil, and then reduce the refrigerant and evaporate the foaming fast and take away the probability of disturbing refrigerant and machine oil, thereby can effectively reduce the probability that the compressor runs in the lack of oil, make the compressor run in the lack of oil lead to the probability of wearing and tearing also reduce thereupon, thereby can effectively improve the life of compressor.
Correspondingly, if the operation frequency is not within the highest set frequency range of the compressor, the actual working condition of the compressor can be judged to be a low-frequency operation working condition, and the discharge pressure can be improved by improving the operation frequency of the compressor under the low-frequency operation working condition of the compressor; therefore, on the basis of improving the exhaust pressure, the solubility of the refrigerant in the refrigerating machine oil of the compressor can be effectively improved, the probability that the refrigerant and the machine oil are disordered to be taken away by rapid evaporation foaming of the refrigerant is reduced, the probability of oil shortage operation of the compressor can be effectively reduced, the probability that the oil shortage operation of the compressor leads to abrasion is reduced, and the service life of the compressor can be effectively prolonged.
In another embodiment of the present disclosure, after determining whether the current oil level height is less than the set oil level height, if it is determined that the current oil level height is not less than the set oil level height, obtaining a kinematic viscosity of the engine oil of the compressor; and if the kinematic viscosity of the engine oil is less than the set viscosity, starting an electric heating belt of the air conditioner to heat the coolant of the compressor.
Specifically, the set viscosity can be set manually or by an air conditioner, and can be set according to actual requirements, and the set viscosity can be, for example, 0.03-0.5 centipoise (cp), 0.02-0.8cp, 0.08-0.4cp,0.1-0.7cp and the like. Preferably, the viscosity is set to 0.03-0.5 cp.
Specifically, the kinematic viscosity of the engine oil is compared with the set viscosity, and then whether the kinematic viscosity of the engine oil is smaller than the set viscosity is judged. When the kinematic viscosity of the engine oil is judged to be smaller than the set viscosity, the engine oil can be located on the upper layer due to low density of the engine oil, at the moment, the kinematic viscosity of the engine oil is smaller than the set viscosity, the probability that the oil located on an oil-rich layer (namely the upper layer) can be rapidly discharged is high, so that the oil level descending speed of the compressor is increased, the probability that the compressor runs in an oil-deficient mode is increased, at the moment, the electric heating belt heats the bottom oil pool of the compressor, the phenomenon that the refrigerant excessively returns is reduced, layering of the refrigerating engine oil and the refrigerant is reduced, and the refrigerating engine oil is located above the oil-rich layer and is discharged out of the compressor along with the refrigerant after being started. Therefore, the probability of the oil-starved operation of the compressor can be effectively reduced, the probability of abrasion caused by the oil-starved operation of the compressor is reduced, and the service life of the compressor can be effectively prolonged.
In another embodiment of the present disclosure, after determining whether the oil temperature superheat degree is less than a set superheat degree threshold, if it is determined that the oil temperature superheat degree is not less than the set superheat degree threshold, obtaining a current exhaust temperature of the compressor; and if the current exhaust temperature is less than the set exhaust temperature, increasing the operating frequency of the compressor.
Specifically, the set exhaust temperature may be set manually or by an air conditioner, or may be set according to actual requirements, and may be, for example, 80 to 95 ℃, 75 to 97 ℃, 85 to 92 ℃,86 to 96 ℃, or the like. Preferably, the exhaust gas temperature is set to 80-95 ℃.
Specifically, when the oil temperature superheat degree is judged to be not less than the set superheat degree threshold value, whether the current exhaust temperature is less than the set exhaust temperature is judged, if the current exhaust temperature is judged to be less than the set exhaust temperature, at the moment, it can be determined that the oil level is lower than the set oil level height, and the current exhaust temperature is lower, at the moment, the operation frequency of the compressor can be improved, so that the exhaust pressure is improved, on the basis of improving the exhaust pressure, the solubility of a refrigerant in the compressor refrigerating machine oil can be effectively improved, the condition that a large amount of refrigerating machine oil is taken away by the refrigerant through rapid evaporation foaming is further reduced, the probability of oil shortage operation of the compressor can be effectively reduced, the probability of abrasion caused by the oil shortage operation of the compressor is also reduced, and the service life of the compressor can be effectively prolonged.
And when the current exhaust temperature is judged to be not less than the set exhaust temperature, at the moment, the fact that the oil level is lower than the set oil level height can be determined, the current exhaust temperature is higher, at the moment, the probability that the compressor is insufficient in oil film thickness is higher, the probability that the compressor is abraded due to oil shortage operation is promoted to be higher, at the moment, the compressor can be controlled to stop, and alarm information is output, so that the probability that the abrasion is aggravated due to the fact that the compressor is continuously operated due to oil shortage is reduced. When the alarm information is output, the user terminal can be reminded of the user through the ring or the alarm information.
Referring to fig. 2a to 2d, there are diagrams illustrating the determination and processing steps of various confirmation statuses of the air conditioner according to the embodiment of the present disclosure. Fig. 2a shows the oil shortage with a low oil temperature, a high degree of superheat and a high oil discharge rate, fig. 2b shows the oil shortage with a low frequency and a low oil, fig. 2c shows the oil shortage with an overload, and fig. 2d shows the oil shortage with a low temperature and a low oil viscosity. The following detailed description is made in conjunction with FIGS. 2 a-2 d: firstly, executing the step A1, starting the air conditioner, namely starting the air conditioner; after the step a1 is executed, step a2 is executed to run for the set time t, at which time, the time can be counted by a counter; then, step A3 is executed, and the current oil level height H0 of the compressor is obtained; after obtaining H0, step a4 is performed, and it is determined whether H0 is smaller than the set oil level height H1; if the temperature of the oil pool is less than the preset temperature, executing the step A50, obtaining the temperature and the exhaust pressure of the oil pool, and calculating the superheat degree delta T of the oil temperature; and if not, executing A60 and obtaining the kinematic viscosity V of the oil of the compressor.
After the step A50 is executed, the step A51 is executed to judge whether the delta T is smaller than a set superheat threshold value T1; if the frequency is less than the preset frequency, executing the step A52, and acquiring the operating frequency F of the compressor; after the step A52 is executed, the step A53 is executed to judge whether the frequency is in the highest set frequency range; if so, executing the step A54, reducing the current gear of the condenser fan, and keeping the minimum rotating speed of the condenser fan to operate; if not, step A55 is executed to increase the operating frequency of the compressor.
After the step A51 is executed, if the delta T is judged to be not less than the set superheat threshold value T1, the step A70 is executed to acquire the exhaust temperature T of the compressorp(ii) a After the step A70, execute the step A71, judge TpWhether or not it is less than the set exhaust temperature T2; if so, go to step A55; if not, executing the step A72 and immediately stopping the machine to alarm.
And after the step A60 is executed, the step A61 is executed, whether V is not less than the set viscosity T3 is judged, and if not, the step A62 is executed, and the air conditioner operates normally; if the temperature is less than the preset temperature, step A63 is executed, and the electric heating belt is opened to heat the coolant of the compressor.
So, through detecting the current oil level height to the compressor, to because the oil extraction leads to scarcely oil (the high oil extraction rate of low oil temperature superheat degree, the low oil viscosity of low oil temperature superheat degree), lead to scarcely oil (under the low frequency operating mode) slowly because the oil return, and because overload leads to scarcely oil (the high oil level of exhaust temperature is low, the oil film covers inadequately) every kind of scene that leads to scarcely oil detects, and set up corresponding oil return control strategy, can effectively reduce the probability that the compressor lacks oil operation, make the compressor lack oil operation lead to the probability of wearing and tearing also reduce thereupon, thereby can effectively improve the life of compressor.
Based on the technical scheme, when the air conditioner is in a starting state, if the current oil level height of a compressor of the air conditioner is smaller than the set oil level height and the oil temperature superheat degree of the compressor is smaller than the set superheat degree threshold value, at the moment, the situation that the oil temperature superheat degree is low and the oil discharge rate is high belongs to the situation, and then the operation frequency is judged not to be within the highest set frequency range of the compressor, the operation frequency of the compressor is improved; when the running frequency of the compressor is within the highest set frequency range of the compressor, the air conditioner can be determined to be under an overload working condition, at the moment, the current gear of a condenser fan of the air conditioner is reduced, the current rotating speed of the condenser fan is reduced to the set rotating speed, the exhaust pressure can be effectively improved, on the basis that the exhaust pressure is improved, the solubility of a refrigerant in the refrigerating machine oil of the compressor can be effectively improved, the condition that the refrigerant quickly evaporates and foams to take away a large amount of refrigerating machine oil is reduced, the probability of the oil-deficient running of the compressor can be effectively reduced, the probability of abrasion caused by the oil-deficient running of the compressor is reduced, and the service life of the compressor can be effectively prolonged.
Moreover, the oil level height, the oil temperature superheat degree, the exhaust temperature, the engine oil kinematic viscosity and other compressor parameters are analyzed in a combined mode, the specific oil shortage condition (overload, low-frequency oil shortage, low oil temperature superheat degree, high oil discharge rate, low temperature and low oil viscosity) can be effectively identified, targeted solutions are provided, oil return efficiency can be guaranteed, and the probability of follow-up continuous oil shortage operation of the compressor is reduced.
A second aspect of the embodiment of the present application also provides a control device of an air conditioner, please refer to fig. 3, where the device includes:
an oil temperature superheat degree obtaining unit 301, configured to obtain an oil temperature superheat degree of a compressor of an air conditioner when the air conditioner is in a start state;
an operating frequency obtaining unit 302, configured to obtain an operating frequency of the compressor if an oil temperature superheat degree of the compressor is less than a set superheat degree threshold;
and the control unit 303 is configured to decrease a current gear of a condenser fan of the air conditioner if the operating frequency is within a highest set frequency range of the compressor.
In an optional embodiment, the method further comprises:
the judging unit is used for judging whether the current oil level height is smaller than the set oil level height or not after the current oil level height of a compressor of the air conditioner is obtained and before the current oil level height is smaller than the set oil level height.
In an optional embodiment, the method further comprises:
the viscosity obtaining unit is used for obtaining the engine oil kinematic viscosity of the compressor if the current oil level height is not less than the set oil level height after judging whether the current oil level height is less than the set oil level height;
and the control unit is used for starting an electric heating belt of the air conditioner to heat the coolant of the compressor if the engine oil kinematic viscosity is less than the set viscosity.
In an optional embodiment, the method further comprises:
an oil temperature superheat degree obtaining unit, configured to, after determining whether the current oil level height is smaller than the set oil level height and before the oil temperature superheat degree of the compressor is smaller than a set superheat degree threshold value, obtain a current oil sump temperature and a current exhaust pressure of the compressor if it is determined that the current oil level height is smaller than the set oil level height; acquiring the superheat degree of the oil temperature according to the current oil pool temperature and the current exhaust pressure;
the judging unit is used for judging whether the oil temperature superheat degree is smaller than the set superheat degree threshold value or not.
In an optional embodiment, the method further comprises:
the exhaust temperature obtaining unit is used for obtaining the current exhaust temperature of the compressor if the oil temperature superheat degree is not less than the set superheat degree threshold value after judging whether the oil temperature superheat degree is less than the set superheat degree threshold value or not;
the control unit is used for increasing the running frequency of the compressor if the current exhaust temperature is less than the set exhaust temperature; and if the current exhaust temperature is greater than or equal to the set exhaust temperature, controlling the compressor to stop and giving an alarm.
In an alternative embodiment, the determining unit is configured to determine whether the operating frequency is within the highest set frequency range after the operating frequency of the compressor is obtained and before the current gear of the condenser fan of the air conditioner is lowered.
In an alternative embodiment, the control unit is configured to, after determining whether the operating frequency is within the highest set frequency range, increase the operating frequency of the compressor if the operating frequency is not within the highest set frequency range of the compressor.
The third aspect of the embodiments of the present application also provides an air conditioner, where the air conditioner includes an air conditioner body, a memory and a compressor that are disposed in the air conditioner body, and one or more programs, where one or more programs are stored in the memory and configured to be executed by one or more processors, where the one or more programs include an operation instruction for performing the control method of the air conditioner.
A fourth aspect of the embodiments of the present application also provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps corresponding to the control method of the air conditioner.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is only limited by the appended claims
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (11)
1. A method for controlling an air conditioner, the method comprising:
acquiring the superheat degree of oil temperature of a compressor of an air conditioner when the air conditioner is in a starting state;
if the oil temperature superheat degree is smaller than a set superheat degree threshold value, acquiring the operating frequency of the compressor;
and if the operating frequency is within the highest set frequency range of the compressor, reducing the current gear of a condenser fan of the air conditioner.
2. The method as claimed in claim 1, wherein said obtaining the superheat of the oil temperature of the compressor of the air conditioner comprises:
acquiring the current oil level height of a compressor of the air conditioner;
and if the current oil level height is smaller than the set oil level height, acquiring the superheat degree of the oil temperature of the compressor.
3. The method of claim 1, wherein after obtaining a current oil level height of a compressor of the air conditioner and before the current oil level height is less than a set oil level height, the method further comprises:
and judging whether the current oil level height is smaller than the set oil level height.
4. The method of claim 3, wherein after determining whether the current oil level height is less than the set oil level height, the method further comprises:
if the current oil level height is not smaller than the set oil level height, obtaining the engine oil kinematic viscosity of the compressor;
and if the engine oil kinematic viscosity is less than the set viscosity, starting an electric heating belt of the air conditioner to heat the coolant of the compressor.
5. The method of claim 1, wherein after determining whether the current oil level height is less than the set oil level height and before an oil temperature superheat of the compressor is less than a set superheat threshold, the method further comprises:
if the current oil level height is smaller than the set oil level height, acquiring the current oil pool temperature and the current exhaust pressure of the compressor;
acquiring the superheat degree of the oil temperature according to the current oil pool temperature and the current exhaust pressure;
and judging whether the oil temperature superheat degree is smaller than the set superheat degree threshold value or not.
6. The method of claim 5, wherein after determining whether the oil temperature superheat is less than the set superheat threshold, the method further comprises:
if the oil temperature superheat degree is not less than the set superheat degree threshold value, acquiring the current exhaust temperature of the compressor;
if the current exhaust temperature is lower than the set exhaust temperature, the running frequency of the compressor is increased;
and if the current exhaust temperature is greater than or equal to the set exhaust temperature, controlling the compressor to stop and giving an alarm.
7. The method of any one of claims 1-6, wherein after obtaining the operating frequency of the compressor and before lowering the current gear of the condenser fan of the air conditioner, the method further comprises:
and judging whether the operating frequency is in the highest set frequency range.
8. The method of claim 7, wherein after determining whether the operating frequency is within the highest set frequency range, the method further comprises:
and if the operating frequency is not in the highest set frequency range of the compressor, increasing the operating frequency of the compressor.
9. A control apparatus of an air conditioner, comprising:
the air conditioner control device comprises an oil temperature superheat degree acquisition unit, a control unit and a control unit, wherein the oil temperature superheat degree acquisition unit is used for acquiring the oil temperature superheat degree of a compressor of an air conditioner when the air conditioner is in a starting state;
the operating frequency acquiring unit is used for acquiring the operating frequency of the compressor if the oil temperature superheat degree of the compressor is smaller than a set superheat degree threshold value;
and the control unit is used for reducing the current gear of a condenser fan of the air conditioner if the operating frequency is within the highest set frequency range of the compressor.
10. An air conditioner, comprising an air conditioner body, a memory and a compressor arranged in the air conditioner body, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by one or more processors to execute the operating instructions included in the one or more programs for performing the method according to any one of claims 1 to 8.
11. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps corresponding to the method according to any one of claims 1 to 8.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627496A (en) * | 2014-10-29 | 2016-06-01 | 青岛海尔空调器有限总公司 | Low-temperature refrigerating control method of air conditioner and air conditioner |
| CN107893763A (en) * | 2017-11-03 | 2018-04-10 | 宁波奥克斯电气股份有限公司 | A kind of compressor condition control method and device |
| CN109556308A (en) * | 2018-11-28 | 2019-04-02 | 宁波奥克斯电气股份有限公司 | A kind of control method and air conditioner of air source heat pump system air conditioner cold-starting |
| CN110296547A (en) * | 2019-07-04 | 2019-10-01 | 宁波奥克斯电气股份有限公司 | A kind of multi-connected machine method for controlling oil return, system and air conditioner |
| CN111765606A (en) * | 2020-06-10 | 2020-10-13 | 海信（山东）空调有限公司 | Method for controlling low-temperature heating start of air conditioner, air conditioner and storage medium |
| CN112902503A (en) * | 2021-02-03 | 2021-06-04 | 四川长虹空调有限公司 | Variable frequency multi-split air conditioning unit heating oil return control method |
| CN113375273A (en) * | 2021-06-24 | 2021-09-10 | 宁波奥克斯电气股份有限公司 | Compressor frequency control method and device and air conditioner |
-
2021
- 2021-09-18 CN CN202111112351.8A patent/CN113776175B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627496A (en) * | 2014-10-29 | 2016-06-01 | 青岛海尔空调器有限总公司 | Low-temperature refrigerating control method of air conditioner and air conditioner |
| CN107893763A (en) * | 2017-11-03 | 2018-04-10 | 宁波奥克斯电气股份有限公司 | A kind of compressor condition control method and device |
| CN109556308A (en) * | 2018-11-28 | 2019-04-02 | 宁波奥克斯电气股份有限公司 | A kind of control method and air conditioner of air source heat pump system air conditioner cold-starting |
| CN110296547A (en) * | 2019-07-04 | 2019-10-01 | 宁波奥克斯电气股份有限公司 | A kind of multi-connected machine method for controlling oil return, system and air conditioner |
| CN111765606A (en) * | 2020-06-10 | 2020-10-13 | 海信（山东）空调有限公司 | Method for controlling low-temperature heating start of air conditioner, air conditioner and storage medium |
| CN112902503A (en) * | 2021-02-03 | 2021-06-04 | 四川长虹空调有限公司 | Variable frequency multi-split air conditioning unit heating oil return control method |
| CN113375273A (en) * | 2021-06-24 | 2021-09-10 | 宁波奥克斯电气股份有限公司 | Compressor frequency control method and device and air conditioner |
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