CN111023460B - Air conditioner control method and device, air conditioner and storage medium - Google Patents

Air conditioner control method and device, air conditioner and storage medium Download PDF

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Publication number
CN111023460B
CN111023460B CN201911410208.XA CN201911410208A CN111023460B CN 111023460 B CN111023460 B CN 111023460B CN 201911410208 A CN201911410208 A CN 201911410208A CN 111023460 B CN111023460 B CN 111023460B
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compressor
upper limit
limit value
outdoor unit
running frequency
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CN111023460A (en
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王猛
陈华
刘合心
黄春
刘潘
邓赛峰
余超群
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Ningbo Aux Electric Co Ltd
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Ningbo Aux Electric Co Ltd
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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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—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
    • 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
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits

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

Abstract

The invention provides a control method and a device of an air conditioner, the air conditioner and a storage medium, which relate to the technical field of air conditioners, wherein the control method comprises the steps of obtaining an upper limit value of the rotating speed of an outdoor unit fan and an upper limit value of the running frequency of a compressor under the normal heating mode of the air conditioner and the real-time running frequency of the compressor; according to the magnitude relation between the upper limit value of the compressor running frequency in the normal heating mode and the real-time running frequency of the compressor; determining whether heat absorption by the outdoor heat exchanger is affected; determining that heat absorption by the outdoor heat exchanger is affected. Compared with the prior art, the control method of the air conditioner can delay defrosting by improving the running frequency of the compressor and the rotating speed of the outer fan when the air conditioner frosts, ensures that the room temperature is kept unchanged, and improves the comfort level of users.

Description

Air conditioner control method and device, air conditioner and storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and device of an air conditioner, the air conditioner and a storage medium.
Background
In cold winter, more and more homes are getting heated using air conditioners, especially in southern areas where there is no central heating. However, when the air conditioner is operated in a heating mode in winter, the heat exchanger of the external unit is frosted, the distance between fins is reduced, the heat transfer coefficient is reduced, and the heat exchange effect is seriously influenced. At present, the main method for solving the problems is to adopt the reversing of a four-way reversing valve to defrost, but the defrosting method can cause the transient reduction of indoor temperature in the defrosting process and influence the experience of users.
Disclosure of Invention
The invention solves the problem that the conventional air conditioner adopts the reversing of the four-way reversing valve to defrost, but the defrosting method can cause the transient reduction of the indoor temperature in the defrosting process and influence the user experience.
In order to solve the above problems, the present invention provides a method for controlling an air conditioner, including:
acquiring an upper limit value of the rotating speed of an outdoor unit fan and an upper limit value of the running frequency of a compressor under a normal heating mode of an air conditioner and the real-time running frequency of the compressor;
according to the magnitude relation between the upper limit value of the compressor running frequency in the normal heating mode and the real-time running frequency of the compressor; determining whether heat absorption by the outdoor heat exchanger is affected;
when the heat absorption of the outdoor heat exchanger is influenced, continuously acquiring the real-time current value of the outdoor fan; determining whether the outdoor heat exchanger frosts or not according to the magnitude relation between the real-time current value of the outdoor fan and a first preset current;
and when the outdoor heat exchanger frosts, correcting the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the outdoor unit fan.
Therefore, whether the heat absorption of the outdoor heat exchanger is influenced or not is determined by acquiring the upper limit value of the rotating speed of the outdoor unit fan and the upper limit value of the running frequency of the compressor in the normal mode and the real-time running frequency of the compressor and the upper limit value of the running frequency of the compressor, and if the outdoor heat exchanger is influenced, whether the outdoor heat exchanger is frosted or not is determined by the current of the outdoor unit fan and the first preset current. If the frosting of the outdoor heat exchanger is caused, the defrosting is delayed by increasing the running frequency of the compressor and the rotating speed of the outdoor fan during frosting, the room temperature is kept unchanged, and the comfort level of a user is improved.
Further, according to the magnitude relation between the upper limit value of the compressor running frequency in the normal heating mode and the real-time running frequency of the compressor; determining whether heat absorption by the outdoor heat exchanger is affected; the method specifically comprises the following steps:
when the real-time running frequency of the compressor is smaller than the upper limit value of the running frequency of the compressor in the normal heating mode, the heat absorption of the outdoor heat exchanger is not influenced;
and when the real-time running frequency of the compressor is equal to the upper limit value of the running frequency of the compressor in the normal heating mode, the heat absorption of the outdoor heat exchanger is influenced.
Therefore, whether the heat absorption of the outdoor heat exchanger is influenced or not can be accurately determined through the magnitude relation between the upper limit value of the compressor operation frequency in the normal heating mode and the real-time operation frequency of the compressor.
Further, whether the outdoor heat exchanger frosts or not is determined according to the magnitude relation between the real-time current value of the outdoor fan and a first preset current; the method specifically comprises the following steps:
when the real-time current value of the outdoor unit fan is larger than a first preset current, the outdoor heat exchanger is not frosted;
and when the real-time current value of the outdoor unit fan is smaller than the first preset current, the outdoor heat exchanger frosts.
Therefore, the relation between the current of the outdoor unit fan and the first preset current is used for determining whether the influence of heat absorption of the outdoor heat exchanger is caused by frosting of the outdoor heat exchanger or not, and the determination accuracy is high.
Further, when the outdoor heat exchanger is frosted, the method for correcting the upper limit value of the operating frequency of the compressor and the upper limit value of the rotating speed of the outdoor unit fan specifically comprises the following steps:
and after the frosting of the outdoor heat exchanger is determined, continuously acquiring a real-time current value of the outdoor unit fan, and correcting an upper limit value of the running frequency of the compressor and an upper limit value of the rotating speed of the outdoor unit fan according to the real-time current value of the outdoor unit fan.
Therefore, the upper limit value of the operation of the compressor and the upper limit value of the rotating speed of the outdoor unit fan are corrected through the acquired real-time current value of the outdoor unit fan by determining that the heat absorption affecting the outdoor heat exchanger is caused by frosting. Furthermore, the frosting time of the air conditioner is delayed, and the indoor temperature is guaranteed to be unchanged.
Further, according to the real-time current value of the outdoor unit fan, the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the outdoor unit fan are corrected, and the method comprises the following steps:
when the real-time current value of the outdoor unit fan is in a second preset current range, the upper limit value of the running frequency of the first compressor is equal to the sum of the real-time running frequency of the compressor and the corrected value of the running frequency of the first compressor; the upper limit value of the rotating speed of the first outdoor unit fan is equal to the sum of the rotating speed of the outdoor unit fan and the corrected value of the rotating speed of the first outdoor unit fan;
when the real-time current value of the outdoor unit fan is in a third preset current range, the upper limit value of the running frequency of the second compressor is equal to the sum of the real-time running frequency of the compressor and the corrected value of the running frequency of the second compressor, and the upper limit value of the rotating speed of the second outdoor unit fan is equal to the sum of the rotating speed of the outdoor unit fan and the corrected value of the rotating speed of the second outdoor unit fan;
when the real-time current value of the outdoor unit fan is in a fourth preset current range, the upper limit value of the running frequency of the third compressor is equal to the sum of the real-time running frequency of the compressor and a corrected value of the running frequency of the third compressor, and the upper limit value of the rotating speed of the outdoor unit fan is equal to the sum of the rotating speed of the outdoor unit fan and a corrected value of the rotating speed of the outdoor unit fan;
when the real-time current value of the outdoor unit fan is in a fifth preset current range, the upper limit value of the running frequency of the fourth compressor is equal to the sum of the real-time running frequency of the compressor and a corrected value of the running frequency of the fourth compressor, and the upper limit value of the rotating speed of the fourth outdoor unit fan is equal to the sum of the rotating speed of the outdoor unit fan and a corrected value of the rotating speed of the fourth outdoor unit fan;
when the real-time current value of the outdoor unit fan is in a sixth preset current range, the upper limit value of the running frequency of the fifth compressor is equal to the sum of the real-time running frequency of the compressor and a corrected value of the running frequency of the fifth compressor, and the upper limit value of the rotating speed of the fifth outdoor unit fan is equal to the sum of the rotating speed of the outdoor unit fan and a corrected value of the rotating speed of the fifth outdoor unit fan.
Therefore, when the real-time current value of the outdoor unit fan is in the preset current range, the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the outdoor unit fan are corrected, the preset current range sections of the real-time current value of the outdoor unit fan are different, the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the outdoor unit fan are also different, and therefore the normal running of the air conditioner is guaranteed, heat supply is continued, and meanwhile the service life of the air conditioning system is not damaged.
Further, after the frosting of the outdoor heat exchanger is determined; further comprising: and receiving the air conditioner shutdown instruction, automatically performing a defrosting mode on the air conditioner, automatically shutting down the air conditioner after defrosting is finished, and zeroing a corrected value obtained by correcting the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the outdoor unit fan.
Therefore, when the user selects to turn off the air conditioner, the air conditioner automatically enters a defrosting mode, after defrosting is finished, the air conditioner is automatically turned off, and before the air conditioner is turned off, the corrected value for correcting the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the fan of the outdoor unit is reset to zero, so that the condition that the running of the air conditioner is abnormal due to the fact that the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the fan of the outdoor unit are too high when the air conditioner is turned on next time is prevented.
Further, the defrost mode further comprises: and the four-way reversing valve performs reversing treatment.
Therefore, the four-way reversing valve carries out reversing treatment, and the problem of frosting is fundamentally solved.
Compared with the prior art, the control method of the air conditioner has the advantages that defrosting can be delayed by increasing the running frequency of the compressor and the rotating speed of the outer fan when the air conditioner frosts, the room temperature is kept unchanged, and the comfort level of a user is improved.
In order to solve the above technical problem, the present invention further provides a control device of an air conditioner, including:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring an upper limit value of the rotating speed of an outdoor unit fan, an upper limit value of the running frequency of a compressor and the real-time running frequency of the compressor in a normal heating mode of the air conditioner;
the acquisition unit is also used for acquiring the real-time current value of the outdoor unit fan;
the calculating unit is used for calculating the magnitude relation between the upper limit value of the compressor running frequency in the normal heating mode and the real-time running frequency of the compressor and determining whether the heat absorption of the outdoor heat exchanger is influenced or not;
the calculating unit is further used for calculating the magnitude relation between the real-time current value of the outdoor unit fan and a first preset current and determining whether the outdoor heat exchanger frosts;
and the control unit is used for controlling the correction of the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the outdoor unit fan.
Therefore, the upper limit value of the rotating speed of the outdoor unit fan and the upper limit value of the running frequency of the compressor in the normal mode are obtained through the obtaining unit, the size relation between the real-time running frequency of the compressor and the upper limit value of the running frequency of the compressor is calculated through the calculating unit, whether the heat absorption of the outdoor heat exchanger is influenced or not is determined, if the outdoor heat exchanger is influenced, the size relation between the current of the outdoor unit fan and the first preset current is continuously calculated through the calculating unit, and whether the frosting of the outdoor heat exchanger is caused or not is determined. If the frosting of the outdoor heat exchanger causes, the running frequency of the compressor and the rotating speed of the outer fan are improved through the control unit during frosting so as to delay the defrosting, the room temperature is kept unchanged, and the comfort level of a user is improved.
The advantages of the control device of the air conditioner of the invention relative to the prior art are the same as the advantages of the control method of the air conditioner relative to the prior art, and are not repeated herein.
In order to solve the technical problem, the present invention further provides an air conditioner, including a computer readable storage medium storing a computer program and a processor, where the computer program is read and executed by the processor to implement the control method of the air conditioner.
Therefore, through a computer readable storage medium and a processor which store a computer program, and when the computer program is read and operated by the processor, whether the heat absorption of the outdoor heat exchanger is influenced or not is determined through the upper limit value of the rotating speed of the outdoor unit fan and the upper limit value of the running frequency of the compressor in the normal mode, and if the outdoor heat exchanger is influenced, whether the frosting of the outdoor heat exchanger is caused or not is determined through the current of the outdoor unit fan and the first preset current. If the frosting of the outdoor heat exchanger is caused, the defrosting is delayed by increasing the running frequency of the compressor and the rotating speed of the outer fan during frosting, the room temperature is kept unchanged, and the comfort level of a user is improved.
Other advantages of the air conditioner of the present invention over the prior art are the same as those of the control method of the air conditioner over the prior art, and are not described herein again.
In order to solve the technical problem, the present invention further provides a computer-readable storage medium, in which a computer program is stored, and when the computer program is read and executed by a processor, the control method of the air conditioner is implemented.
The advantages of the computer-readable storage medium of the present invention over the prior art are the same as the advantages of the control method of the air conditioner over the prior art, and are not described herein again.
Drawings
Fig. 1 is a first flowchart of a control method of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a second flowchart illustrating a method for controlling an air conditioner according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a step S5 of the control method of the air conditioner according to the embodiment of the present invention;
fig. 4 is a third specific flowchart of a control method of an air conditioner according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the description of the present invention, it is to be understood that the terms "first", "second" … … "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first", "second" … … "sixth" may explicitly or implicitly include at least one of the feature. The description of the term "some embodiments" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. Throughout this specification, the schematic representations of the terms used above do not necessarily refer to the same implementation or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
As shown in fig. 1 and 2, an embodiment of the present invention provides a method for controlling an air conditioner, including the following steps:
s1, acquiring an upper limit value of the rotating speed of an outdoor unit fan and an upper limit value of the running frequency of a compressor under the normal heating mode of the air conditioner and the real-time running frequency of the compressor;
s2, according to the magnitude relation between the upper limit value of the compressor running frequency in the normal heating mode and the real-time running frequency of the compressor; determining whether heat absorption by the outdoor heat exchanger is affected;
s3, when the heat absorption of the outdoor heat exchanger is influenced, continuously acquiring the real-time current value of the outdoor fan;
s4, obtaining a real-time current value Is and a first preset current I according to the outdoor unit fan1Determining whether the outdoor heat exchanger frosts or not according to the size relation of the outdoor heat exchanger;
and S5, when the outdoor heat exchanger frosts, correcting the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the outdoor unit fan.
The method comprises the steps of obtaining an upper limit value of the rotating speed of an outdoor unit fan and an upper limit value of the running frequency of a compressor in a normal mode, determining whether heat absorption of an outdoor heat exchanger is influenced or not through the real-time running frequency of the compressor and the upper limit value of the running frequency of the compressor, and if the outdoor heat exchanger is influenced, determining whether frosting of the outdoor heat exchanger is caused or not through the current of the outdoor unit fan and a first preset current. If the frosting of the outdoor heat exchanger is caused, the defrosting is delayed by increasing the running frequency of the compressor and the rotating speed of the outer fan during frosting, the room temperature is kept unchanged, and the comfort level of a user is improved.
In some specific embodiments, the step S2 specifically includes:
s21, when the real-time running frequency F of the compressor is smaller than the upper limit value F of the running frequency of the compressor in the normal heating mode, the heat absorption of the outdoor heat exchanger is not influenced; the heat absorption of the outdoor heat exchanger is not influenced, and the indoor heat supply is not influenced;
when the real-time operation frequency F of the compressor is equal to the upper limit value F of the operation frequency of the compressor in the normal heating mode, the heat absorption of the outdoor heat exchanger is affected. The operation frequency of the compressor reaches the upper limit, and the heat absorption of the indoor heat exchanger is influenced, but the operation frequency is not necessarily caused by serious frosting and can be influenced by factors such as overhigh exhaust temperature of the compressor and the like.
The invention does not compare the real-time operation frequency F of the compressor with the upper limit value F of the operation frequency of the compressor in the normal heating mode, because if the real-time operation frequency F of the compressor is greater than the upper limit value F, the compressor can be shut down for protection and cannot normally operate.
Through the magnitude relation between the upper limit value of the compressor running frequency in the normal heating mode and the real-time running frequency of the compressor, whether the heat absorption of the outdoor heat exchanger is influenced or not can be accurately determined.
Since it is determined that the heat absorption of the outdoor heat exchanger is affected, but whether it is caused by the frosting of the outdoor heat exchanger cannot be determined, further determination is required.
In some specific embodiments, the step S4 specifically includes:
s41 real-time current value I of outdoor unit fansNot less than the first preset current I1If the outdoor heat exchanger is frosted, the outdoor heat exchanger is frosted; the rotating speed of the outdoor unit fan is not corrected.
When the real-time current value I of the outdoor unit fans< first predetermined Current I1And then the outdoor heat exchanger frosts. If the outdoor heat exchanger is seriously frosted and blocked, the rotating speed of the fan reaches the upper limit, so measures need to be taken, the performance of the system is improved, and the continuous heat supply is ensured.
Preferably, the first predetermined current I1The range of (A) is as follows: 0.9-1.2A, preferably, a first predetermined current I1Is 1A. The first preset current I of the invention1Is not limited to the above range, and the first predetermined current I is1The range of the fan is only the better current value of the embodiment, and the type and the size of the fan adopted by the air conditioner are different, so the fan can be set according to the type and the size of the fan adopted by the actual air conditioner.
Current I through outdoor unit fansAnd a first predetermined current I1The relation of the indoor temperature and the outdoor temperature, so that whether the heat absorption of the outdoor heat exchanger is influenced by frosting of the outdoor heat exchanger or not is determined, and the accuracy is high.
The step S5 specifically includes:
and after the frosting of the outdoor heat exchanger is determined, continuously acquiring the real-time current value of the outdoor fan, and correcting the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the outdoor fan according to the real-time current value of the outdoor fan.
The method comprises the steps of determining that heat absorption of an outdoor heat exchanger is caused by frosting, and correcting an upper limit value of operation of a compressor and an upper limit value of rotating speed of an outdoor fan according to an obtained real-time current value of the outdoor fan. Furthermore, the frosting time of the air conditioner is delayed, and the indoor temperature is guaranteed to be unchanged.
As shown in fig. 3, in some specific embodiments, the step 5 further includes:
when the real-time current value I of the outdoor unit fansAt a second preset current I2In the range, the corresponding adjustment level is X1 level, and X1 level corresponds to the upper limit value F of the operating frequency of the first compressor1Real-time operating frequency F + first compressor operating frequency correction FL of compressor1(ii) a Upper limit value N of first outer fan rotating speed1The corrected value NL of the rotation speed N + of the outdoor unit fan and the rotation speed of the first outdoor unit fan1。
When the real-time current value I of the outdoor unit fansAt a third preset current I3In the range, the corresponding adjustment level is X2 level, and X2 level corresponds to the upper limit value F of the operating frequency of the second compressor2Real-time operating frequency F + second compressor operating frequency correction FL of compressor2(ii) a Upper limit value N of fan rotating speed of second outdoor unit2The sum of the outdoor unit fan rotation speed N + and the correction value NL of the second outdoor unit fan rotation speed2。
When the real-time current value I of the outdoor unit fansAt a fourth preset current I4In the range, the corresponding adjustment level is X3 level, and X3 level corresponds to the upper limit value F of the third compressor operation frequency3Real-time operating frequency F + third compressor operating frequency correction FL of compressor3(ii) a Upper limit value N of fan rotating speed of third outdoor unit3Corrected value NL of the rotation speed N + of the outdoor unit fan and the rotation speed of the third outdoor unit fan3。
When the real-time current value I of the outdoor unit fansAt a fifth preset current I5In the range, the corresponding adjustment level is X4 level, and X4 level corresponds to the upper limit value F of the operating frequency of the fourth compressor4Real-time operating frequency F + fourth compressor operating frequency correction FL of compressor4Upper limit value N of fan rotating speed of fifth outdoor unit4Outdoor machineCorrection value NL of fan rotating speed N + fourth outdoor unit fan rotating speed4。
When the real-time current value I of the outdoor unit fansAt a sixth preset current I6In the range, the corresponding adjustment level is X5 level, and X5 level corresponds to the upper limit value F of the operating frequency of the fifth compressor5Real-time operating frequency F + fifth compressor operating frequency correction FL of compressor5Upper limit value N of fan rotating speed of fifth outdoor unit5Corrected value NL of outdoor unit fan rotation speed N + fifth outdoor unit fan rotation speed5。
When the first preset current I1 is set to 1A; preferably, when the second preset current I2 ranges from: 0.9-1A; x1 set to level 1; then, the range of FL1 is: 2-4 HZ; NL1 has a range of: 15-30 r/min.
When the third predetermined current I3 ranges from: 0.8-0.9A; x2 set to level 2; then, the range of FL2 is: 4-6 HZ; NL2 has a range of: 30-45 r/min.
When the range of the fourth preset current I4 is: 0.7-0.8A; x3 set to level 3; then, the range of FL3 is: 6-8 HZ; NL3 has a range of: 45-60 r/min.
When the range of the fifth preset current I5 is: 0.6-0.7A; x4 set to 4 levels; then, the range of FL4 is: 8-10 HZ; NL4 has a range of: 60-75 r/min.
When the range of the sixth preset current I6 is: 0.5-0.6A; x5 set to 5 stages; then, the range of FL5 is: 10-12 HZ; NL5 has a range of: 75-90 r/min.
When the frosting is determined to be serious, the control method does not need to perform reverse defrosting on the heat exchanger, so that the indoor temperature is reduced, and the control method adjusts the indoor temperature by improving the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the outdoor unit fan, so that the defrosting of the system is delayed.
For example, if the motor current of the outdoor unit fan is monitored to be 0.83A, it may be determined that the level 2 adjustment is performed. The frequency correction value of the compressor is obtained to be FL 2-4HZ, and the correction value NL2 of the fan rotation speed is obtained to be 30 r/min. The frequency upper limit value F1 of the adjusted compressor is equal to F +4, and the rotating speed upper limit value N1 of the outdoor unit fan is equal to N + 30. It should be noted that the above mentioned correction value is a preferable range value of the present embodiment, and the designer can adjust the correction value according to the actual environment, the kind of refrigerant and the system design.
When the real-time current value of the outdoor unit fan is in different preset current ranges, the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the outdoor unit fan are corrected, the preset current range intervals of the real-time current value of the outdoor unit fan are different, the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the outdoor unit fan are also corrected differently, and therefore the service life of an air conditioning system can be guaranteed while the normal running of the air conditioner is guaranteed to continuously supply heat.
As shown in fig. 4, in S6, the air conditioner automatically performs the defrosting mode when receiving the air conditioner shutdown command, and after defrosting is completed, the air conditioner is automatically shutdown, and the correction value for correcting the upper limit value of the operating frequency of the compressor and the upper limit value of the rotation speed of the outdoor unit fan is returned to zero.
When a user selects to shut down the air conditioner, the air conditioner automatically enters a defrosting mode, the four-way reversing valve performs reversing treatment, the air conditioner is automatically shut down after defrosting is completed, the air conditioner is automatically shut down again after defrosting is completed, before the air conditioner is shut down, a correction value for correcting the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the fan of the outdoor unit is reset to zero, and the condition that the running of the air conditioner is abnormal due to the fact that the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the fan of the outdoor unit are too high when the air conditioner is started next time is prevented.
The control method of the invention delays defrosting by increasing the frequency of the compressor and the rotating speed of the outer fan when frosting. According to different frosting degrees, corrected values of the frequency of the compressor and the rotating speed of the outer fan are obtained, then the upper limit values of the frequency of the compressor and the rotating speed of the outer fan are corrected, the indoor heat supply is kept constant, the room temperature is kept unchanged, and the comfort level of users is improved. When the air conditioner is selected to be shut down, the air conditioner is firstly switched into a defrosting mode and then is shut down, and the problem of frosting is fundamentally solved.
Another embodiment of the present invention provides a control apparatus of an air conditioner, including:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring an upper limit value of the rotating speed of an outdoor unit fan, an upper limit value of the running frequency of a compressor and the real-time running frequency of the compressor in a normal heating mode of the air conditioner;
the acquisition unit is also used for acquiring the real-time current value of the outdoor unit fan;
the calculating unit is used for calculating the magnitude relation between the upper limit value of the compressor running frequency in the normal heating mode and the real-time running frequency of the compressor and determining whether the heat absorption of the outdoor heat exchanger is influenced or not;
the calculating unit is further used for calculating the magnitude relation between the real-time current value of the outdoor unit fan and a first preset current and determining whether the outdoor heat exchanger frosts;
and the control unit is used for controlling and correcting the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the outdoor unit fan.
The advantages of the control device of the air conditioner of the invention relative to the prior art are the same as the advantages of the control method of the air conditioner relative to the prior art, and are not repeated herein.
Another embodiment of the present invention also provides an air conditioner including a computer-readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and executed to implement the control method of the air conditioner as described above.
Therefore, whether the heat absorption of the outdoor heat exchanger is influenced or not can be determined by acquiring the upper limit value of the rotating speed of the outdoor unit fan and the upper limit value of the running frequency of the compressor in the normal mode through the computer readable storage medium and the processor which store the computer program, and when the computer program is read and run by the processor, and the heat absorption of the outdoor heat exchanger is determined through the real-time running frequency of the compressor and the upper limit value of the running frequency of the compressor, if the outdoor heat exchanger is determined to be influenced, whether the frosting of the outdoor heat exchanger is caused or not is determined through the current of the outdoor unit fan and the first preset current. If the frosting of the outdoor heat exchanger is caused, the defrosting is delayed by increasing the running frequency of the compressor and the rotating speed of the outer fan during frosting, the room temperature is kept unchanged, and the comfort level of a user is improved.
Other advantages of the air conditioner of the present invention over the prior art are the same as those of the control method of the air conditioner over the prior art, and are not described herein again.
The present invention also provides a computer-readable storage medium storing a computer program, which when read and executed by a processor, implements the control method of the air conditioner as described above.
The advantages of the computer-readable storage medium in this embodiment over the prior art are the same as the advantages of the control method of the air conditioner over the prior art, and are not described herein again.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A control method of an air conditioner, comprising:
acquiring an upper limit value of the rotating speed of an outdoor unit fan and an upper limit value of the running frequency of a compressor under a normal heating mode of an air conditioner and the real-time running frequency of the compressor;
according to the magnitude relation between the upper limit value of the compressor running frequency in the normal heating mode and the real-time running frequency of the compressor; determining whether heat absorption by the outdoor heat exchanger is affected;
when the heat absorption of the outdoor heat exchanger is influenced, continuously acquiring the real-time current value of the outdoor fan; determining whether the outdoor heat exchanger frosts or not according to the magnitude relation between the real-time current value of the outdoor fan and a first preset current;
and when the outdoor heat exchanger frosts, controlling the correction of the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the outdoor unit fan.
2. The control method of an air conditioner according to claim 1, wherein the upper limit value of the operation frequency of the compressor in the normal heating mode is related to the magnitude of the real-time operation frequency of the compressor; the determining whether the heat absorption of the outdoor heat exchanger is affected specifically includes:
when the real-time running frequency of the compressor is smaller than the upper limit value of the running frequency of the compressor in the normal heating mode, the heat absorption of the outdoor heat exchanger is not influenced;
and when the real-time running frequency of the compressor is equal to the upper limit value of the running frequency of the compressor in the normal heating mode, the heat absorption of the outdoor heat exchanger is influenced.
3. The method of claim 1, wherein determining whether the outdoor heat exchanger is frosted according to a magnitude relationship between a real-time current value of the outdoor fan and a first preset current specifically comprises:
when the real-time current value of the outdoor unit fan is larger than or equal to a first preset current, the outdoor heat exchanger is not frosted;
and when the real-time current value of the outdoor unit fan is smaller than the first preset current, the outdoor heat exchanger frosts.
4. The method of claim 1, wherein the correcting the upper limit value of the operating frequency of the compressor and the upper limit value of the rotational speed of the outdoor unit fan when the outdoor heat exchanger is frosted comprises:
and after the frosting of the outdoor heat exchanger is determined, continuously acquiring a real-time current value of the outdoor unit fan, and correcting an upper limit value of the running frequency of the compressor and an upper limit value of the rotating speed of the outdoor unit fan according to the real-time current value of the outdoor unit fan.
5. The method of claim 4, wherein the correcting the upper limit value of the compressor operation frequency and the upper limit value of the outdoor unit fan rotation speed according to the real-time current value of the outdoor unit fan comprises:
when the real-time current value of the outdoor unit fan is in a second preset current range, the upper limit value of the running frequency of the first compressor is equal to the sum of the real-time running frequency of the compressor and the corrected value of the running frequency of the first compressor; the upper limit value of the rotating speed of the first outdoor unit fan is equal to the sum of the rotating speed of the outdoor unit fan and the corrected value of the rotating speed of the first outdoor unit fan;
when the real-time current value of the outdoor unit fan is in a third preset current range, the upper limit value of the running frequency of the second compressor is equal to the sum of the real-time running frequency of the compressor and the corrected value of the running frequency of the second compressor, and the upper limit value of the rotating speed of the second outdoor unit fan is equal to the sum of the rotating speed of the outdoor unit fan and the corrected value of the rotating speed of the second outdoor unit fan;
when the real-time current value of the outdoor unit fan is in a fourth preset current range, the upper limit value of the running frequency of the third compressor is equal to the sum of the real-time running frequency of the compressor and the corrected value of the running frequency of the third compressor, and the upper limit value of the rotating speed of the outdoor unit fan is equal to the sum of the rotating speed of the outdoor unit fan and the corrected value of the rotating speed of the outdoor unit fan;
when the real-time current value of the outdoor unit fan is in a fifth preset current range, the upper limit value of the running frequency of the fourth compressor is equal to the sum of the real-time running frequency of the compressor and the corrected value of the running frequency of the fourth compressor, and the upper limit value of the rotating speed of the fourth outdoor unit fan is equal to the sum of the rotating speed of the outdoor unit fan and the corrected value of the rotating speed of the fourth outdoor unit fan;
when the real-time current value of the outdoor unit fan is in a sixth preset current range, the upper limit value of the running frequency of the fifth compressor is equal to the sum of the real-time running frequency of the compressor and the corrected value of the running frequency of the fifth compressor, and the upper limit value of the rotating speed of the fifth outdoor unit fan is equal to the sum of the rotating speed of the outdoor unit fan and the corrected value of the rotating speed of the fifth outdoor unit fan.
6. The control method of an air conditioner according to claim 1, further comprising, after determining that the outdoor heat exchanger is frosted: and receiving the air conditioner shutdown instruction, automatically performing a defrosting mode on the air conditioner, automatically shutting down the air conditioner after defrosting is finished, and zeroing the corrected values of the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the outdoor unit fan.
7. The control method of an air conditioner according to claim 6, wherein the defrost mode further comprises: and the four-way reversing valve performs reversing treatment.
8. A control apparatus of an air conditioner, comprising:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring an upper limit value of the rotating speed of an outdoor unit fan, an upper limit value of the running frequency of a compressor and the real-time running frequency of the compressor in a normal heating mode of the air conditioner;
the acquisition unit is also used for acquiring the real-time current value of the outdoor unit fan;
the calculating unit is used for calculating the magnitude relation between the upper limit value of the compressor running frequency in the normal heating mode and the real-time running frequency of the compressor and determining whether the heat absorption of the outdoor heat exchanger is influenced or not;
the calculating unit is further used for calculating the magnitude relation between the real-time current value of the outdoor unit fan and a first preset current and determining whether the outdoor heat exchanger frosts;
and the control unit is used for controlling the correction of the upper limit value of the running frequency of the compressor and the upper limit value of the rotating speed of the outdoor unit fan.
9. An air conditioner comprising a computer-readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the control method of the air conditioner according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the control method of an air conditioner according to any one of claims 1 to 7.
CN201911410208.XA 2019-12-31 2019-12-31 Air conditioner control method and device, air conditioner and storage medium Active CN111023460B (en)

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