CN113531861A - Control method of air conditioner and air conditioner - Google Patents

Control method of air conditioner and air conditioner Download PDF

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Publication number
CN113531861A
CN113531861A CN202110831126.3A CN202110831126A CN113531861A CN 113531861 A CN113531861 A CN 113531861A CN 202110831126 A CN202110831126 A CN 202110831126A CN 113531861 A CN113531861 A CN 113531861A
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China
Prior art keywords
compressor
frequency
mode
air conditioner
temperature
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CN202110831126.3A
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Chinese (zh)
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CN113531861B (en
Inventor
陈锐东
彭杰
熊重重
廖永富
邹云辉
刘雷明
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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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
    • 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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/021—Inverters therefor
    • 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 an air conditioner and a control method thereof. The compressor frequency-increasing mode of the air conditioner comprises a compressor fast frequency-increasing mode and a compressor conventional frequency-increasing mode, and the control method comprises the following steps: after the air conditioner is started, determining a corresponding compressor frequency increasing mode according to the indoor environment temperature, the outdoor environment temperature, the user set temperature and the flag bit; when the indoor environment temperature, the outdoor environment temperature, the user set temperature and the flag bit all meet preset conditions, starting the compressor according to a rapid frequency increasing mode; and when any one of the indoor environment temperature, the outdoor environment temperature, the user set temperature and the flag bit does not meet the preset condition, starting the compressor according to a conventional frequency increasing mode.

Description

Control method of air conditioner and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner and the air conditioner.
Background
At present, after an air conditioner is started, the compressor is required to be started to operate to realize the refrigerating and heating effects, the frequency of the variable frequency compressor is a key parameter influencing the work of the compressor, therefore, the frequency increasing rate of the compressor greatly influences the refrigerating temperature drop and heating temperature increase effects in the early stage of starting, according to the prior art and a control mode, generally, the compressor is started and stays for a period of time at a fixed starting frequency (generally 20-40 Hz, which is different according to different compressor displacement or rotor quantity), then is gradually increased to a target frequency, the frequency increasing rate is generally 1HZ/S, the compressor is more reliable to control, different frequency staying points are set to stay for a certain period of time, therefore, the time from the starting of the compressor to the frequency increasing to a certain frequency (such as 80Hz) generally needs 3min or even longer time, and the actual experience of the user is greatly influenced by the refrigerating and heating effect 10min after the computer is started. In other methods, the frequency of the compressor is controlled by adopting a fast frequency increasing method under specific conditions, so that the problem of slow frequency increasing during the starting of the compressor is solved to a great extent, but the applicability and the practicability of the method are limited.
Disclosure of Invention
In view of this, the invention discloses a control method of an air conditioner and the air conditioner, which are used for at least solving the problems of slow frequency increasing rate of the existing compressor and limitation of the existing quick start control mode.
In order to achieve the above object, the invention adopts the following technical scheme:
the invention discloses a control method of an air conditioner, wherein a compressor frequency increasing mode of the air conditioner comprises a compressor quick frequency increasing mode and a compressor conventional frequency increasing mode, and the control method comprises the following steps:
after the air conditioner is started, determining a corresponding compressor frequency increasing mode according to the indoor environment temperature, the outdoor environment temperature, the user set temperature and the flag bit;
when the indoor environment temperature, the outdoor environment temperature, the user set temperature and the flag bit all meet preset conditions, starting the compressor according to a rapid frequency increasing mode;
and when any one of the indoor environment temperature, the outdoor environment temperature, the user set temperature and the flag bit does not meet the preset condition, starting the compressor according to a conventional frequency increasing mode.
Further optionally, the control method includes:
judging the current operation mode of the air conditioner;
acquiring indoor environment temperature, outdoor environment temperature and set temperature;
determining a zone bit by combining the operation protection and the operation action of the air conditioner;
and controlling the air conditioner to select a corresponding compressor frequency increasing mode to increase the frequency according to the current operation mode, the indoor environment temperature, the outdoor environment temperature, the set temperature and the flag bit.
Further optionally, the controlling the air conditioner to select a corresponding compressor frequency increasing mode for frequency increasing according to the current operation mode, the indoor environment temperature, the outdoor environment temperature, the set temperature, and the flag bit includes:
when the current operation mode is a refrigeration mode, judging whether a first frequency increasing condition is met, and when the first frequency increasing condition is met, selecting a quick mode frequency increasing of a compressor by the air conditioner; otherwise, selecting the normal mode of the compressor to increase the frequency; wherein the first boost condition comprises: the indoor environment temperature is more than or equal to a first preset temperature, the outdoor environment temperature is less than or equal to a second preset temperature, the indoor environment temperature-the current set temperature of the air conditioner is more than or equal to a first preset temperature difference, and the flag bit is an allowable frequency increasing bit;
when the current operation mode is a heating mode, judging whether a second frequency increasing condition is met, and when the second frequency increasing condition is met, selecting a quick mode frequency increasing of a compressor by the air conditioner; otherwise, selecting the normal mode of the compressor to increase the frequency; wherein the second boost condition comprises: the indoor environment temperature is less than or equal to a third preset temperature, the outdoor environment temperature is less than or equal to a fourth preset temperature, the current set temperature of the air conditioner, namely the indoor environment temperature, is greater than or equal to a second preset temperature difference, and the flag bit is an allowable frequency increasing bit.
Further optionally, the compressor fast mode upscaling comprises:
after the compressor is started, the frequency of the compressor is increased to a first preset frequency stop point within a first preset time, and the compressor stops at a second preset time;
increasing the frequency of the compressor to a target operation frequency of the compressor at a preset frequency increasing rate, wherein the compressor is kept for a third preset time after each preset frequency difference value is increased;
and after the target operation frequency of the compressor is reached, switching the frequency of the compressor to fuzzy control.
Further optionally, the compressor frequency of the first preset frequency dwell point is 60Hz-70 Hz.
Further optionally, the determining the flag bit in combination with the operation protection and the operation action of the air conditioner includes:
the flag is determined based on whether there is a protective shutdown of the compressor and/or whether there is a failed start-up of the compressor and/or whether there is an over-protective downconversion within a fourth predetermined time prior to the shutdown of the compressor.
Further optionally, the determining the flag according to whether there is a protective shutdown of the compressor and/or whether there is a failed start-up of the compressor and/or whether there is an over-protective down-conversion within a fourth preset time before the shutdown of the compressor includes:
when protective shutdown of the compressor exists, or starting failure of the compressor exists, or protective frequency reduction occurs within fourth preset time before shutdown of the compressor, determining that the flag bit is a frequency increasing disallowance bit and recording as 0;
and when the compressor is not in protective shutdown, the compressor is not failed to start and the protective frequency reduction does not occur within the fourth preset time before the compressor is shut down, determining the flag bit as a non-allowable frequency increasing bit and recording as 1.
Further optionally, the determining the flag according to whether there is a protective shutdown of the compressor and/or whether there is a failed start-up of the compressor and/or whether there is an over-protective down-conversion within a fourth preset time before the shutdown of the compressor includes:
s1, when determining the zone bit by combining the operation protection and the operation action of the air conditioner, firstly setting the zone bit as an allowable frequency increasing bit and recording as 1;
s2, judging whether protective shutdown of the compressor, failed start of the compressor and over-protective frequency reduction occurring in the fourth preset time before shutdown of the compressor exist or not, changing the flag bit to a frequency increasing disallowed bit and recording the flag bit as 0 when protective shutdown of the compressor or failed start of the compressor or over-protective frequency reduction occurring in the fourth preset time before shutdown of the compressor exists, and executing the step S3;
and S3, judging whether the protective shutdown of the compressor or the operation mode of the air conditioner is switched within the fifth preset time, resetting the flag bit as an ascending-frequency-allowed bit and recording the ascending-frequency-allowed bit as 1 after the protective shutdown of the compressor or the operation mode of the air conditioner is not switched within the fifth preset time, and executing the step S2 again.
Further optionally, the compressor protective shutdown comprises: the system comprises an inner pipe, an outer machine pipe, a heating mode, an inner pipe, a cooling mode, an exhaust mode, an anti-freezing mode, an outer machine pipe, an inner machine pipe, an exhaust mode and an over-current mode.
Further optionally, the control method further includes:
after the air conditioner is powered on and started, the movement mechanism and the electronic expansion valve in the refrigeration system of the air conditioner are reset.
The invention discloses an air conditioner in a second aspect, and the air conditioner adopts the control method.
Has the advantages that: the invention shortens the starting up frequency increasing time of the compressor and improves the comfort of users by improving the air conditioner.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely exemplary embodiments of the present disclosure, and other drawings may be derived by those skilled in the art without inventive effort.
FIG. 1 illustrates an embodiment of up-conversion mode selection logic;
FIG. 2 illustrates one embodiment of flag bit determination logic for enabling fast up mode;
FIG. 3 is a diagram illustrating an embodiment of a fast ramp-up mode power-on initial frequency control scheme.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude at least one, unless the context clearly dictates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
The existing air conditioner has the defects of low compressor frequency increasing rate and limitation of the existing quick starting control mode. The invention improves the frequency increasing rate of the compressor under the working condition of medium and light load, improves the frequency increasing rate of the compressor at the initial stage of starting under the condition of ensuring the reliability of the compressor and a system, shortens the frequency increasing time of the starting of the compressor and improves the comfort of users.
To further illustrate the technical solution of the present invention, the following specific examples are provided as shown in fig. 1 to 3.
Example 1
In the present embodiment, there is provided a control method of an air conditioner, including:
judging the current operation mode of the air conditioner;
acquiring indoor environment temperature, outdoor environment temperature and set temperature;
determining a zone bit by combining the operation protection and the operation action of the air conditioner;
and controlling the air conditioner to select a corresponding compressor frequency increasing mode for frequency increasing according to the current operation mode, the indoor environment temperature, the outdoor environment temperature, the set temperature and the flag bit.
In some alternatives, controlling the air conditioner to select a corresponding compressor up-conversion mode for up-conversion according to the current operation mode, the indoor ambient temperature, the outdoor ambient temperature, the set temperature, and the flag includes:
1) if the current operation mode is a refrigeration mode, judging whether a first frequency increasing condition is met, and if the first frequency increasing condition is met, selecting a quick mode frequency increasing of a compressor by the air conditioner; otherwise, selecting the normal mode of the compressor to increase the frequency; wherein the first boost condition comprises: the indoor ambient temperature TInner ringNot less than a first preset temperature T1, and the outdoor environment temperature TOuter ringA second preset temperature T2 ≦ and the indoor ambient temperature TInner ringThe current set temperature of the air conditioner is greater than or equal to the first preset temperatureAnd setting the temperature difference delta T1, wherein the flag bit is an allowable frequency increasing bit. Namely: and when the following ABCD conditions are met in the refrigerating mode, a rapid frequency increasing mode is adopted, otherwise, a conventional mode is adopted.
A、T1≤TInner ring(T1 20 ℃ recommended);
B、Touter ringT2(T2 recommends 45 ℃);
C、Tinner ring-TSetting upNot less than delta T1 (delta T1 recommends 3 ℃);
D. allowing the fast up-conversion mode to be turned on (i.e., flag bit K ═ 1).
2) If the current operation mode is the heating mode, judging whether a second frequency increasing condition is met, and if the second frequency increasing condition is met, selecting a quick mode frequency increasing of a compressor by the air conditioner; otherwise, selecting the normal mode of the compressor to increase the frequency; wherein the second boost condition comprises: the indoor ambient temperature TInner ringA third preset temperature T3 or less, and the outdoor environment temperature TOuter ringNot more than fourth preset temperature T4, and the current set temperature T of the air conditionerSetting up-said indoor ambient temperature TInner ringThe temperature difference is not less than a second preset temperature difference delta T2, and the flag bit is an allowable frequency increasing bit. Namely: and when the following ABCD conditions are met under the heating mode, a rapid frequency increasing mode is adopted, otherwise, a conventional mode is adopted.
A、T3≥TInner ring(T3 recommended 25 ℃);
B、Touter ringT4 (20 ℃ recommended for T4);
C、Tsetting up-TInner ringNot less than delta T2 (delta T2 recommends 3 ℃);
D. allowing the fast up-conversion mode to be turned on (i.e., flag bit K ═ 1).
In some alternatives, the compressor fast mode upscaling includes: after the compressor is started, the frequency of the compressor is increased to a first preset frequency stop point within a first preset time, and the compressor stops at a second preset time; increasing the frequency of the compressor to a target operation frequency of the compressor at a preset frequency increasing rate, wherein the compressor is kept for a third preset time after each preset frequency difference value is increased; and after the target operation frequency of the compressor is reached, switching the frequency of the compressor to fuzzy control. Preferably, the compressor frequency of the first preset frequency stop point is 60Hz-70 Hz. Specifically, when the fast frequency raising is performed on the compressor, the frequency control logic of the compressor is as follows:
after the compressor is started, the frequency of the compressor is increased to a first preset frequency stop point (high frequency stop point) FH (recommended 60-70 Hz) within a first preset time t1 (recommended 10S), the compressor stays for a second preset time t2 (recommended 1min), the compressor is increased to a target operation frequency F at a preset increasing rate a Hz/S (recommended 5Hz/S), the compressor stays for a third preset time t3 (recommended 10S) when increasing a preset frequency difference bHz (recommended 10Hz), and then fuzzy control is switched. It should be noted that the fuzzy control is a commonly used control method for the existing air conditioner control, that is, a method for dynamically adjusting the air conditioner frequency and the air conditioner opening degree by detecting the heating temperature rise speed, the cooling temperature drop speed and the difference between the heating temperature rise speed and the set temperature of the inner ring temperature at any moment and combining the current set state such as the wind gear and other information, if the current value is close to the target, the operation frequency is reduced, and if the distance between the current value and the target value is larger, the operation frequency is increased, and the like, which will not be described in detail herein
In some optional manners, the determining a flag bit in combination with the operation protection and the operation action of the air conditioner includes: the flag is determined based on whether there is a protective shutdown of the compressor and/or whether there is a failed start-up of the compressor and/or whether there is an over-protective downconversion within a fourth predetermined time prior to the shutdown of the compressor. Wherein: in one form, said determining a flag based on whether there is a protective shutdown of the compressor and/or whether there is a failed start-up of the compressor and/or whether there is an over-protective downconversion within a fourth predetermined time prior to the shutdown of the compressor comprises: when protective shutdown of the compressor exists, or starting failure of the compressor exists, or protective frequency reduction occurs within fourth preset time before shutdown of the compressor, determining that the flag bit is a frequency increasing disallowance bit and recording as 0; and when the compressor is not in protective shutdown, the compressor is not failed to start and the protective frequency reduction does not occur within the fourth preset time before the compressor is shut down, determining the flag bit as an allowable frequency increasing bit and recording as 1.
Based on the above, in another alternative, the flag bit may also be set at preset time intervals or in real time. At this time, the determining the flag according to whether there is a protective shutdown of the compressor and/or whether there is a start failure of the compressor and/or whether there is an over-protective down-conversion occurring within a fourth preset time before the shutdown of the compressor includes:
s1, when determining the zone bit by combining the operation protection and the operation action of the air conditioner, firstly setting the zone bit as an allowable frequency increasing bit and recording as 1;
s2, judging whether protective shutdown of the compressor, failed start of the compressor and over-protective frequency reduction occurring in the fourth preset time before shutdown of the compressor exist or not, changing the flag bit to a frequency increasing disallowed bit and recording the flag bit as 0 when protective shutdown of the compressor or failed start of the compressor or over-protective frequency reduction occurring in the fourth preset time before shutdown of the compressor exists, and executing the step S3;
and S3, judging whether the protective shutdown of the compressor or the operation mode of the air conditioner is switched within the fifth preset time, resetting the flag bit as an ascending-frequency-allowed bit and recording the ascending-frequency-allowed bit as 1 after the protective shutdown of the compressor or the operation mode of the air conditioner is not switched within the fifth preset time, and executing the step S2 again.
Specifically, the control of the flag bit K allowing the fast ramp-up mode to be turned on in the present embodiment is shown in fig. 2.
The flag bit K is 1 by default, and when any one or more of the following conditions ABC are satisfied, K is 0:
A. occurrence of protective shutdown
B. The failure of starting the compressor occurs
C. Over-protective down-conversion occurs within a fourth preset time t4 (recommended 10min) before the compressor is stopped
After K is 0, any 1 condition AB below is satisfied, and K is 1
A. The compressor is continuously operated accumulatively for the fifth preset time t5 (recommended 60min) without protective shutdown
B. Actual operation mode switching
It should be noted that the actual operation mode switching means that if the current mode is the cooling mode, the mode switching is performed only when the mode switching needs to be switched to the non-cooling mode, and if the current mode is the heating mode, the mode switching needs to be switched to the non-heating mode to be actually switched.
In some alternatives, the compressor protective shutdown comprises: the system comprises an inner pipe, an outer machine pipe, a heating mode, an inner pipe, a cooling mode, an exhaust mode, an anti-freezing mode, an outer machine pipe, an inner machine pipe, an exhaust mode and an over-current mode.
In this embodiment, the control method of the air conditioner is based on the frequency increasing rate of the compressor under the medium-light load working condition, and the frequency increasing rate of the compressor at the initial starting stage is increased under the condition that the reliability of the compressor and the system is ensured. At this time, the control method further includes: after the air conditioner is powered on and started, the motion mechanism, the electronic expansion valve and the like of the air conditioner are reset. The motion mechanism comprises a left wind sweeping motor and a right wind sweeping motor which drive the left wind deflector and the right wind deflector to move, an up wind sweeping motor and an down wind sweeping motor which drive the up wind deflector and the down wind deflector to move, and the like.
Example 2
In the present embodiment, an air conditioner is disclosed, which employs any one of the control methods of embodiment 1. The following is a further description of the specific working process.
After the air conditioner is powered on and started, the air conditioner can be reset through a series of resetting actions such as a movement mechanism, an electronic expansion valve and the like, the compressor is started for refrigerating and heating after the air conditioner is in a starting state, the output capacity of the air conditioner is in a direct proportional relation with the frequency of the air conditioner, and the output speed of the capacity of the air conditioner is determined by the speed of the frequency rising speed of the compressor, so that the refrigerating temperature drop and the heating temperature rising speed after starting are improved, and the frequency rising speed of the compressor is directly and remarkably improved.
The invention adopts the following strategy to control the frequency, and achieves the effect of quickly increasing the frequency to realize quick refrigeration and heating under the condition of ensuring the reliability of the compressor and the air conditioning system.
1) Under the refrigeration mode, when all the following conditions are met, a rapid frequency increasing mode is adopted:
A、T1≤Tinner ring(Note: when the inner ring is less than T1 (20 ℃ is recommended), the use of rapid frequency rise tends to cause the evaporator to frost due to too low an evaporation temperature, and in general, when the inner ring is less than T1, rapid refrigeration tends to cause the inner ring temperature to decrease too quickly, thereby causing frequent startup and shutdown and reducing the use comfort)
B、TOuter ringT2 (note: when the outer ring is larger than T2 (45 ℃ is recommended), the condensation pressure is higher, the power consumption of the compressor is larger, the current of the whole machine is easy to be overlarge due to rapid frequency rising, the controller is protected by the insufficient heat dissipation capacity, the frequency is reduced, even the machine is stopped, therefore, when the outer ring is higher, the operation reliability of the whole machine should be preferentially ensured)
C、TInner ring-TSetting upGtoreq delta T1 (note: when the temperature difference between the set temperature and the ambient temperature is less than delta T1 (recommended 3 ℃), the refrigeration demand is considered to be low, if rapid frequency rise is adopted, the compressor is easy to reduce the frequency due to the temperature reaching the set temperature just after the frequency is increased to high frequency, and even the compressor can be started and stopped frequently due to temperature drop overshoot, which affects the comfort)
D. The fast frequency-increasing mode (namely the flag bit K is 1) is allowed to be started (note that when the last shutdown is abnormal shutdown, such as freeze-proof protection shutdown caused by too low temperature of an evaporator, overload shutdown caused by too high temperature of an outer pipe, overcurrent protection caused by too high current, failed start-up of a compressor and the like, under the condition that the startup meets the conditions of ABC and the like, the fast frequency-increasing mode is not allowed to be started)
2) And in the heating mode, when all the following conditions are met, a quick frequency increasing mode is adopted:
A、T3≥Tinner ring(note: when the inner ring is larger than T3 (25 ℃ is recommended), the rapid frequency rise is easy to cause the condensation pressure of the inner machine to rise too fast, the current of the whole machine is too large, the overload limit frequency reduction and even the shutdown protection are easy to cause, and when the inner ring is larger than T3 in general, the rapid heating is easy to cause the temperature of the inner ring to rise too fast, thereby causing the frequent startup and shutdown, and reducing the use comfort)
B、TOuter ringT4 (note: when the outer ring is larger than T4 (recommended 20 ℃), the outdoor side evaporation temperature is higher, so that the exhaust temperature and the exhaust pressure are higherIn this case, the rapid frequency rise is adopted, so that overload protection shutdown is easily caused by too fast rise of pressure and exhaust, and in general, when the outer ring is larger than T4, the room heat load is relatively small, the heating output capacity of the air conditioner is relatively abundant, the heating requirement can be met by low-frequency operation, and the rapid frequency rise is adopted, so that temperature overshoot is easily caused and shutdown is frequently started and stopped)
C、TSetting up-TInner ringgtoreDELTA T2 (note: when the temperature difference between the set temperature and the ambient temperature is less than DELTA T2 (recommended 3 ℃), the heating demand is considered to be low, if rapid frequency rise is adopted, the compressor is easy to reduce the frequency due to the temperature reaching the set temperature just after the frequency rises to high frequency, and even the compressor can be started and stopped frequently due to temperature rise overshoot, which affects the comfort)
D. The fast frequency-increasing mode (namely the flag bit K is 1) is allowed to be started (note that when the last shutdown is abnormal shutdown, such as overload shutdown caused by overhigh temperature of an inner pipe, overcurrent protection caused by overhigh current, failed start of a compressor and the like, under the condition that the startup meets the conditions of ABC and the like, the fast frequency-increasing mode is not allowed to be started)
3) When entering the fast up-conversion mode, the compressor operation control logic is as follows:
after the compressor is started, the frequency of the compressor is increased to a high-frequency stopping point FH (recommended 60-70 Hz) within t1 (recommended 10S), and the compressor is stopped for t2 (recommended 1min) (aiming at keeping the compressor and a refrigerant system in a relatively stable state), then the compressor is increased to a target operation frequency Ftarget at the rate of a Hz/S (recommended 5Hz/S), during the period, the compressor stops for t3 (recommended 10S) within each period of bHz (recommended 10Hz) (aiming at making the high-frequency of the compressor more stable), and then the compressor is switched to a normal frequency fuzzy control logic for control.
4) Flag bit K control allowing fast ramp-up mode to be turned on
Setting the K value of the flag bit to 1 in default condition to indicate that the air conditioner is allowed to enter the fast frequency raising mode, and setting the K value of the flag bit to 0 to indicate that the air conditioner is not allowed to enter the fast frequency raising mode when any one or more of the following conditions occur (the following protection only lists some common protection and can be attributed to the occurrence of protective shutdown)
A. Freezing prevention shutdown protection due to low inner tube temperature in refrigeration mode
B. Protective shutdown for over-high temperature of outer machine pipe in refrigeration mode
C. Protective shutdown for over-high temperature of inner machine pipe in heating mode
D. Protective shutdown for occurrence of over-high exhaust
E. Over-current protection shutdown occurs
F. The failure of starting the compressor occurs
G. Protective frequency reduction occurs in t4 time before the compressor is shut down (there are 2 cases of frequency reduction, one is normal frequency reduction, namely the ring temperature is closer to the set temperature, the frequency reduction capacity output is reduced, the other is that a certain condition is about to reach the protection point, generally the frequency is limited to increase and reduce the running frequency before reaching the protection point, when the above operations are ineffective, the protective shutdown is carried out when reaching the protection point)
When the flag bit K is set to 0, the flag bit K is set to 1 when the following arbitrary conditions are satisfied
A. The compressor is continuously operated accumulatively for t5 time without protective shutdown, and if protective shutdown occurs, the accumulated time is counted again;
B. and switching the actual operation modes, if the value of the flag bit K at the last time is set to 0 and appears in the cooling mode, carrying out heating startup at this time, and setting the flag bit K at 1.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (10)

1. A control method of an air conditioner, wherein a compressor up-conversion mode of the air conditioner includes a compressor fast up-conversion mode and a compressor normal up-conversion mode, the control method comprising:
after the air conditioner is started, determining a corresponding compressor frequency increasing mode according to the indoor environment temperature, the outdoor environment temperature, the user set temperature and the flag bit;
when the indoor environment temperature, the outdoor environment temperature, the user set temperature and the flag bit all meet preset conditions, starting the compressor according to a rapid frequency increasing mode;
and when any one of the indoor environment temperature, the outdoor environment temperature, the user set temperature and the flag bit does not meet the preset condition, starting the compressor according to a conventional frequency increasing mode.
2. The control method of an air conditioner according to claim 1, wherein the control method comprises:
judging the current operation mode of the air conditioner;
acquiring indoor environment temperature, outdoor environment temperature and set temperature;
determining a zone bit by combining the operation protection and the operation action of the air conditioner;
and controlling the air conditioner to select a corresponding compressor frequency increasing mode to increase the frequency according to the current operation mode, the indoor environment temperature, the outdoor environment temperature, the set temperature and the flag bit.
3. The method as claimed in claim 2, wherein said controlling the air conditioner to select a corresponding compressor up-conversion mode for up-conversion according to the current operation mode, the indoor ambient temperature, the outdoor ambient temperature, the set temperature, and the flag comprises:
when the current operation mode is a refrigeration mode, judging whether a first frequency increasing condition is met, and when the first frequency increasing condition is met, selecting a quick mode frequency increasing of a compressor by the air conditioner; otherwise, selecting the normal mode of the compressor to increase the frequency; wherein the first boost condition comprises: the indoor environment temperature is more than or equal to a first preset temperature, the outdoor environment temperature is less than or equal to a second preset temperature, the indoor environment temperature-the current set temperature of the air conditioner is more than or equal to a first preset temperature difference, and the flag bit is an allowable frequency increasing bit;
when the current operation mode is a heating mode, judging whether a second frequency increasing condition is met, and when the second frequency increasing condition is met, selecting a quick mode frequency increasing of a compressor by the air conditioner; otherwise, selecting the normal mode of the compressor to increase the frequency; wherein the second boost condition comprises: the indoor environment temperature is less than or equal to a third preset temperature, the outdoor environment temperature is less than or equal to a fourth preset temperature, the current set temperature of the air conditioner, namely the indoor environment temperature, is greater than or equal to a second preset temperature difference, and the flag bit is an allowable frequency increasing bit.
4. The control method of an air conditioner according to claim 3, wherein the compressor fast mode up-conversion includes:
after the compressor is started, the frequency of the compressor is increased to a first preset frequency stop point within a first preset time, and the compressor stops at a second preset time;
increasing the frequency of the compressor to a target operation frequency of the compressor at a preset frequency increasing rate, wherein the compressor is kept for a third preset time after each preset frequency difference value is increased;
and after the target operation frequency of the compressor is reached, switching the frequency of the compressor to fuzzy control.
5. The control method of an air conditioner according to claim 4, wherein the compressor frequency of the first preset frequency stop point is 60Hz-70 Hz.
6. The method as claimed in claim 2, wherein the determining the flag bit in combination with the operation protection and operation action of the air conditioner comprises:
the flag is determined based on whether there is a protective shutdown of the compressor and/or whether there is a failed start-up of the compressor and/or whether there is an over-protective downconversion within a fourth predetermined time prior to the shutdown of the compressor.
7. The method as claimed in claim 6, wherein the determining the flag according to whether there is a protective shutdown of the compressor and/or whether there is a start failure of the compressor and/or whether there is an over-protective down-conversion within a fourth preset time before the shutdown of the compressor comprises:
when protective shutdown of the compressor exists, or starting failure of the compressor exists, or protective frequency reduction occurs within fourth preset time before shutdown of the compressor, determining that the flag bit is a frequency increasing disallowance bit and recording as 0;
and when the compressor is not in protective shutdown, the compressor is not failed to start and the protective frequency reduction does not occur within the fourth preset time before the compressor is shut down, determining the flag bit as an allowable frequency increasing bit and recording as 1.
8. The method as claimed in claim 6, wherein the determining the flag according to whether there is a protective shutdown of the compressor and/or whether there is a start failure of the compressor and/or whether there is an over-protective down-conversion within a fourth preset time before the shutdown of the compressor comprises:
s1, when determining the zone bit by combining the operation protection and the operation action of the air conditioner, firstly setting the zone bit as an allowable frequency increasing bit and recording as 1;
s2, judging whether protective shutdown of the compressor, failed start of the compressor and over-protective frequency reduction occurring in the fourth preset time before shutdown of the compressor exist or not, changing the flag bit to a frequency increasing disallowed bit and recording the flag bit as 0 when protective shutdown of the compressor or failed start of the compressor or over-protective frequency reduction occurring in the fourth preset time before shutdown of the compressor exists, and executing the step S3;
and S3, judging whether the protective shutdown of the compressor or the operation mode of the air conditioner is switched within the fifth preset time, resetting the flag bit as an ascending-frequency-allowed bit and recording the ascending-frequency-allowed bit as 1 after the protective shutdown of the compressor or the operation mode of the air conditioner is not switched within the fifth preset time, and executing the step S2 again.
9. The control method of an air conditioner according to claim 6, wherein the compressor protective stop includes: the system comprises an inner pipe, an outer machine pipe, a heating mode, an inner pipe, a cooling mode, an exhaust mode, an anti-freezing mode, an outer machine pipe, an inner machine pipe, an exhaust mode and an over-current mode.
10. An air conditioner characterized in that the air conditioner employs the control method of any one of claims 1 to 9.
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