CN113983653B - Air conditioning unit starting control method, device and system and air conditioning unit - Google Patents
Air conditioning unit starting control method, device and system and air conditioning unit Download PDFInfo
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- CN113983653B CN113983653B CN202111228737.5A CN202111228737A CN113983653B CN 113983653 B CN113983653 B CN 113983653B CN 202111228737 A CN202111228737 A CN 202111228737A CN 113983653 B CN113983653 B CN 113983653B
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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
- F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- 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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Abstract
The invention relates to an air conditioning unit starting control method, device and system and an air conditioning unit, wherein the air conditioning unit starting control method comprises the following steps: if the compressor control signal indicates starting, acquiring a starting mode of the compressor, and acquiring a current value of each period in real time; determining the starting state and the current state of the compressor according to the starting mode and all current values; if the starting state represents that the starting is finished and the current state represents stable, sending a starting instruction to the gas supplementing control assembly to open the gas supplementing control assembly; if the compressor control signal indicates closing, a closing instruction is sent to the air supply control assembly to close the air supply control assembly, so that when the compressor is started next time, the air supply pipeline is in a closed state, the situation that a refrigerant enters a compressor cavity from the air supply pipeline when the compressor is started at the instant is avoided, the situation that the compressor is loaded at the instant is started is avoided, the starting current and the starting trip fault rate of the air conditioning unit are reduced, the air supply pipeline is opened to supply air to the compressor after the compressor is started and the current is stable, and the energy efficiency of the compressor is guaranteed.
Description
Technical Field
The invention relates to the technical field of compressor control, in particular to an air conditioning unit starting control method, device and system and an air conditioning unit.
Background
The centralized air conditioning unit is also called a central air conditioner, and refers to an air conditioning system in which air processing equipment is centralized in a central air conditioning room, and processed air is delivered to each room through an air pipe. In the existing large-scale central air conditioning unit, the air conditioning compressor is externally provided with three channels, namely an air suction pipeline, an exhaust pipeline and an air supplement pipeline, when the compressor runs at a low evaporation temperature, the problems of increase of air suction specific volume, increase of pressure ratio, rapid rise of exhaust temperature and the like can occur, so that the performance of the compressor is sharply reduced, therefore, medium-pressure gas can be supplemented through the air supplement pipeline, the exhaust capacity is increased, the exhaust temperature is reduced, and the working efficiency of the compressor is improved.
However, when the air conditioner compressor is started, a refrigerant in the system is sucked into the cavity of the compressor from the air supplementing pipeline at the moment that the compressor is started, so that the compressor is started with a load at the moment, the starting current is large, the duration is long, the tripping protection condition of the air conditioning unit occurs, and the starting tripping fault rate of the air conditioning unit is improved.
Therefore, how to reduce the starting current of the air conditioning unit and the starting trip fault rate of the air conditioning unit and ensure the working energy efficiency of the compressor is a technical problem which needs to be solved urgently by technical personnel in the field.
Disclosure of Invention
In view of the above, the present invention provides an air conditioning unit start control method, apparatus, system and air conditioning unit, so as to solve the problems in the prior art that a refrigerant is sucked into a compressor cavity from an air supply pipeline, so that a compressor is started with an instant load, so that a start current is large and a duration time is long, a trip protection condition of the air conditioning unit occurs, and a start trip failure rate of the air conditioning unit is increased.
In order to achieve the purpose, the invention adopts the following technical scheme:
a starting control method of an air conditioning unit comprises the following steps:
acquiring a control signal of a compressor in real time;
if the control signal indicates starting, acquiring a starting mode of the compressor, and acquiring a current value of each period in real time according to a preset period;
determining the starting state of the compressor and the current state of the compressor according to the starting mode and the current value of each period;
if the starting state of the compressor indicates that the starting is finished and the current state of the compressor indicates stable, sending a starting instruction to an air supplementing control assembly arranged on an air supplementing pipeline of the compressor so as to open the air supplementing control assembly, and carrying out air supplementing work on the compressor through the air supplementing pipeline;
and if the control signal represents closing, sending a closing instruction to the air supply control assembly to close the air supply control assembly.
Further, in the above method for controlling starting of an air conditioning unit, the determining a starting state of the compressor and a current state of the compressor according to the starting manner and the current value of each cycle includes:
determining starting current change characteristic information corresponding to the starting mode according to the starting current characteristic curve corresponding to the starting mode;
determining the starting state of the compressor according to the starting current change characteristic information and the current value of each period;
and if the starting state of the compressor indicates that the starting is finished, determining the current state of the compressor according to the starting current change characteristic information and the current value of each period.
Further, in the above method for controlling starting of an air conditioning unit, if the starting mode is direct starting, determining the starting state of the compressor according to the starting current variation characteristic information and the current value of each cycle includes:
determining a starting completion standard range according to the starting current change characteristic information;
calculating a first average current value of a continuous preset number of periods corresponding to the current period, and taking a current value of a period before the continuous preset number of periods as a first comparative current value;
judging whether a first current ratio between the first average current value and the first comparison current value meets the starting completion standard range;
if the first current ratio meets the starting completion standard range, determining that the starting state of the compressor represents the completion of the starting;
and if the first current ratio does not meet the starting completion standard range, determining that the starting state of the compressor indicates that the starting is not completed.
Further, in the above method for controlling starting of an air conditioning unit, if the starting mode is direct starting, determining the current state of the compressor according to the starting current variation characteristic information and the current value of each period includes:
determining a current stable standard range according to the starting current change characteristic information;
calculating a second average current value of a continuous preset number of periods before the current period in real time, and taking the current value of the current period as a second comparative current value;
judging whether a second current ratio between the second comparison current value and the second average current value meets the current stability standard range or not in real time;
if the second current ratio accords with the current stability standard range, counting the continuous times of the second current ratio according with the current stability standard range in real time;
judging whether the continuous times reach preset times or not;
if the continuous times reach the preset times, determining that the current state of the compressor represents stability;
and if the continuous times do not reach the preset times, determining that the current state of the compressor is not stable.
Further, in the above method for controlling starting of an air conditioning unit, before sending an opening instruction to an air make-up control module disposed on an air make-up pipeline of the compressor, the method further includes:
recording the current stable time length;
judging whether the current stabilization duration reaches a first preset duration or not;
send the opening instruction to the tonifying qi control module that sets up on the tonifying qi pipeline of compressor, include:
and if the current stabilizing time length reaches the first preset time length, sending an opening instruction to an air supplementing control assembly arranged on an air supplementing pipeline of the compressor.
Further, in the above method for controlling starting of an air conditioning unit, before sending the closing instruction to the air supply control module, the method further includes:
recording the shutdown time of the compressor;
judging whether the shutdown time of the compressor reaches a second preset time;
the sending of a closing instruction to the air supply control assembly comprises:
and if the last time the compressor stops reaches the second preset duration, sending a closing instruction to the air supply control assembly.
Further, in the above air conditioning unit start control method, the air supply control module includes: an electric valve.
The present invention also provides an air conditioning unit start control apparatus, including:
the acquisition module is used for acquiring a control signal of the compressor in real time;
the acquisition module is used for acquiring the starting mode of the compressor if the control signal indicates starting, and acquiring the current value of each period in real time according to the preset period;
the state determining module is used for determining the starting state of the compressor and the current state of the compressor according to the starting mode and the current value of each period;
the instruction sending module is used for sending an opening instruction to an air supply control assembly arranged on an air supply pipeline of the compressor if the starting state of the compressor indicates that the starting is finished and the current state of the compressor indicates that the compressor is stable, so that the air supply control assembly is opened, and the compressor performs air supply work through the air supply pipeline;
the instruction sending module is further configured to send a closing instruction to the air supply control assembly if the control signal indicates closing, so that the air supply control assembly is closed.
Further, in the above air conditioning unit start control apparatus, the state determining module includes: the device comprises a characteristic determining unit, a starting state determining unit and a current state determining unit;
the characteristic determining unit is used for determining starting current change characteristic information corresponding to the starting mode according to the starting current characteristic curve corresponding to the starting mode;
the starting state determining unit is used for determining the starting state of the compressor according to the starting current change characteristic information and the current value of each period;
and the current state determining unit is used for determining the current state of the compressor according to the starting current change characteristic information and the current value of each period if the starting state of the compressor indicates that the starting is finished.
Further, the air conditioning unit start control device further includes: the device comprises a recording module and a judging module;
the recording module is used for recording the stable duration of the current;
the judging module is used for judging whether the current stable time length reaches a first preset time length or not;
the instruction sending module is further configured to send an opening instruction to an air supply control assembly arranged on an air supply pipeline of the compressor if the current stabilizing duration reaches the first preset duration.
The invention also provides a starting control system of the air conditioning unit, which comprises the following components: the system comprises a processor and a memory connected with the processor;
the memory is used for storing a computer program, and the computer program is at least used for executing the starting control method of the air conditioning unit;
the processor is used for calling and executing the computer program.
The present invention also provides an air conditioning unit comprising: the compressor and the air conditioning unit start control system;
an air supply control assembly is arranged on an air supply pipeline of the compressor;
and the starting current control system of the air conditioning unit is respectively connected with the compressor and the air supply control component.
A method, a device and a system for controlling the starting of an air conditioning unit and the air conditioning unit are provided, wherein the method for controlling the starting current of the air conditioning unit comprises the following steps: acquiring a control signal of a compressor in real time; if the control signal indicates starting, acquiring a starting mode of the compressor, and acquiring a current value of each period in real time; determining the starting state of the compressor and the current state of the compressor according to the starting mode and the current value of each period; if the starting state of the compressor indicates that the starting is finished and the current state of the compressor indicates stable, sending a starting instruction to an air supplement control assembly arranged on an air supplement pipeline of the compressor so as to open the air supplement control assembly, and enabling the compressor to perform air supplement work through the air supplement pipeline; if the control signal indicates closing, a closing instruction is sent to the air supplement control assembly to close the air supplement control assembly, so that when the compressor is started next time, the air supplement pipeline is in a closed state, the situation that a refrigerant enters a compressor cavity from the air supplement pipeline in the moment of starting the compressor is avoided, the situation that the compressor is loaded in the moment of starting the compressor is avoided, starting current and the starting trip fault rate of the air conditioning unit are reduced, meanwhile, the air supplement pipeline can be started to supplement air for the compressor after the compressor is started and the current is stable, and the working energy efficiency of the compressor is guaranteed.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart provided by an embodiment of an air conditioning unit start control method of the present invention;
FIG. 2 is a schematic structural view of an embodiment of a starting control apparatus for an air conditioning unit according to the present invention;
FIG. 3 is a schematic structural diagram of an air conditioning unit start-up control system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an air conditioning unit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 is a flowchart provided in an embodiment of an air conditioning unit start control method according to the present invention, and as shown in fig. 1, the air conditioning unit start control method of the present embodiment specifically includes the following steps:
and S101, acquiring a control signal of the compressor in real time.
In this embodiment, it is necessary to obtain a control signal of the compressor in real time, where the obtained control signal of the compressor indicates to be turned on when the compressor is controlled to be turned on, and the obtained control signal of the compressor indicates to be turned off when the compressor is controlled to be turned off, and the control signal of the compressor can be obtained only at the time of controlling to turn on and turn off the compressor.
And S102, if the control signal indicates to be started, acquiring a starting mode of the compressor, and acquiring a current value of each period in real time according to a preset period.
When the acquired control signal of the compressor indicates to be started, the compressor is started, and at the moment, the air supplementing control assembly arranged on the air supplementing pipeline of the compressor is in a closed state, so that the refrigerant can be prevented from being sucked into the cavity of the compressor from the air supplementing pipeline, and the compressor is prevented from being started with load. In this embodiment, the starting mode of the compressor needs to be acquired, and the current value of each period is acquired in real time according to a preset period. Wherein the preset duration of each period is preferably 20ms. The air supply control assembly is preferably an electrically operated valve.
And S103, determining the starting state of the compressor and the current state of the compressor according to the starting mode and the current value of each period.
And analyzing the starting state of the compressor and the current state of the compressor according to the acquired starting mode and the current value of each period acquired in real time. Wherein the starting state of the compressor comprises starting completion and starting incompletion, and the current state of the compressor comprises smooth and unstable. The method specifically comprises the following steps:
firstly, determining starting current change characteristic information corresponding to a starting mode according to a starting current characteristic curve corresponding to the starting mode.
In this embodiment, the starting modes of the compressors are different, and the corresponding starting current characteristic curves are also different, so that the starting current characteristic curve needs to be determined according to the starting modes of the compressors, and then the starting current change characteristic information corresponding to the starting modes is determined according to the starting current characteristic curve. For example, if the starting mode is direct starting, the corresponding starting current characteristic curve is at a large current peak value in a period of time, and the starting current is rapidly reduced after the motor is started. In this embodiment, the starting modes of the compressor further include star start, soft start, variable frequency start, and the like.
Secondly, determining the starting state of the compressor according to the starting current change characteristic information and the current value of each period.
In this embodiment, the current variation condition of the starting current needs to be matched with the starting current variation characteristic information according to the starting current variation characteristic information corresponding to the compressor starting mode and the current value of each period acquired in real time, so as to determine the current starting state of the compressor.
When the starting mode of the compressor is direct starting, the method specifically comprises the following steps:
(1) And determining a starting completion standard range according to the starting current change characteristic information.
In this embodiment, a start completion standard range when the start state of the compressor indicates that the start is completed may be analyzed according to the start current variation characteristic information corresponding to the start mode of the compressor.
(2) And calculating a first average current value of a continuous preset number of periods corresponding to the current period, and taking a current value of a period before the continuous preset number of periods as a first comparison current value.
In this embodiment, it is further required to calculate a first average current value for a preset number of consecutive periods corresponding to the current period, where the preset number is preferably 10, that is, calculate an average current value for 10 consecutive periods including the current period, that is, a sum of a current value of the current period and all current values of 9 consecutive periods before the current period is divided by 10. And the current value of the period before the preset number of periods is continued as the first comparative current value. Namely, one period before 10 consecutive periods including the current period is taken as a comparison period, and the current value of the comparison period is taken as a first comparison current value.
(3) And judging whether a first current ratio between the first average current value and the first comparison current value meets a starting completion standard range or not.
After the first average current value and the first comparison current value are calculated, the ratio between the first average current value and the first comparison current value needs to be calculated, the ratio is used as a first current ratio, and whether the first current ratio meets the start-up completion standard range or not is judged. The starting completion standard range may be greater than 20%, which is not limited in this embodiment, and the starting current change characteristic information needs to be analyzed and determined.
(4) And if the first current ratio is in accordance with the starting completion standard range, determining that the starting state of the compressor represents the completion of the starting.
If the first current ratio is judged to be in accordance with the starting completion standard range, the change condition of the starting current is shown to be in accordance with the state which represents the starting completion in the starting current characteristic curve, and therefore the current starting state of the compressor is determined to represent the starting completion.
(5) And if the first current ratio does not meet the starting completion standard range, determining that the starting state of the compressor indicates that the starting is not completed.
If the first current ratio is judged not to be in accordance with the starting completion standard range, the change condition of the starting current does not reach the state which represents the completion of the starting in the starting current characteristic curve, and therefore the current starting state of the compressor is determined to represent the incomplete starting. And continuously monitoring the starting state of the compressor, and calculating the first average current value and the first comparison current value in real time until the starting state of the compressor indicates that the starting is finished.
Thirdly, if the starting state of the compressor indicates that the starting is finished, determining the current state of the compressor according to the starting current change characteristic information and the current value of each period.
And if the starting state of the compressor is judged to represent that the starting is finished, judging the current state of the compressor again, and matching the change condition of the current starting current after the starting state of the compressor is detected with the starting current change characteristic information according to the starting current change characteristic information corresponding to the starting mode of the compressor and the current value of each period, thereby determining the current state of the compressor.
When the starting mode of the compressor is direct starting, the method specifically comprises the following steps:
(1) And determining a current stability standard range according to the starting current change characteristic information.
According to the embodiment, the current stabilization standard range when the current state of the compressor represents stabilization can be analyzed according to the starting current change characteristic information corresponding to the starting mode of the compressor.
(2) And calculating a second average current value of a continuous preset number of periods before the current period in real time, and taking the current value of the current period as a second comparison current value.
In this embodiment, the current value of the current period is used as the second comparison current value, and the second average current value of consecutive preset number of periods before the current period needs to be calculated in real time, where the preset number is preferably 10, that is, the average current value of consecutive 10 periods before the current period is calculated in real time.
(3) And judging whether a second current ratio between the second comparison current value and the second average current value meets the current stability standard range or not in real time.
In this embodiment, it is further required to calculate a ratio between the second contrast current value and the second average current value in real time, take the ratio as a second current ratio, and determine whether the second current ratio meets the current stability standard range in real time. The current stability standard range may be less than or equal to 10%, which is not limited in this embodiment, and the start current change characteristic information needs to be analyzed and determined.
(4) And if the second current ratio accords with the current stability standard range, counting the continuous times of the second current ratio according with the current stability standard range in real time.
If the second current ratio is judged to be in accordance with the current stability standard range, the continuous times that the second current ratio is in accordance with the current stability standard range need to be counted in real time.
And if the second current ratio is judged not to accord with the current stability standard range, continuously calculating the second comparison current value and the second average current value in real time until the second current ratio accords with the current stability standard range.
(5) And judging whether the continuous times reach preset times or not.
After counting the continuous times that the second current ratio meets the current stability standard range, it is required to determine whether the continuous times reach a preset time, where the preset time is preferably 5 times, that is, it is determined whether the second current ratio meets the current stability standard range for 5 consecutive times.
(6) And if the continuous times reach the preset times, determining that the current state of the compressor represents stability.
If the continuous times reach the preset times, the change condition of the starting current is consistent with the state of representing the stable current in the starting current characteristic curve, and therefore the current state of the compressor is determined to represent the stable current.
(7) And if the continuous times do not reach the preset times, determining that the current state of the compressor is not stable.
If the continuous times are judged not to reach the preset times, the change condition of the starting current is not in accordance with the state of representing the current stability in the starting current characteristic curve, and therefore the current state of the compressor is determined to represent the current instability. It is also necessary to continue monitoring the current condition of the compressor until the current condition indicates a plateau.
And S104, if the starting state of the compressor indicates that the starting is finished and the current state of the compressor indicates that the compressor is stable, sending a starting instruction to an air supplementing control assembly arranged on an air supplementing pipeline of the compressor to open the air supplementing control assembly, and enabling the compressor to supplement air through the air supplementing pipeline.
If the starting state of the compressor is judged to represent that the starting is finished and the current state of the compressor is stable, the starting of the compressor is finished, the current is in a stable state, a starting instruction needs to be sent to an air supply control assembly arranged on an air supply pipeline of the compressor, the air supply pipeline is recovered to be normal after the air supply control assembly is started, and the compressor can carry out air supply work through the air supply pipeline, so that the working energy efficiency of the compressor is ensured. Wherein, the air supply control component comprises an electric valve.
And S105, if the control signal indicates closing, sending a closing instruction to the air supply control assembly to close the air supply control assembly.
If the obtained control signal of the compressor indicates closing, the compressor is closed at the moment, and then a closing instruction needs to be sent to the air supplementing control assembly to close the air supplementing control assembly, so that the air supplementing pipeline is in a closed state when the compressor is opened next time, the situation that refrigerant enters the cavity of the compressor from the air supplementing pipeline in the moment of opening the compressor can be avoided, the situation that the compressor is loaded in the moment of starting is avoided, and the starting current and the starting tripping fault rate of the air conditioning unit are reduced.
The air conditioning unit starting control method of the embodiment acquires a control signal of a compressor in real time; if the control signal indicates starting, acquiring a starting mode of the compressor, and acquiring a current value of each period in real time; determining the starting state of the compressor and the current state of the compressor according to the starting mode and the current value of each period; if the starting state of the compressor indicates that the starting is finished and the current state of the compressor indicates stable, sending a starting instruction to an air supplement control assembly arranged on an air supplement pipeline of the compressor so as to open the air supplement control assembly, and enabling the compressor to perform air supplement work through the air supplement pipeline; if the control signal indicates closing, a closing instruction is sent to the air supplementing control assembly to close the air supplementing control assembly, so that when the compressor is started next time, the air supplementing pipeline is in a closed state, the situation that a refrigerant enters the cavity of the compressor from the air supplementing pipeline in the moment that the compressor is started is avoided, the situation that the compressor is loaded in the moment that the compressor is started is avoided, the starting current and the starting trip fault rate of the air conditioning unit are reduced, meanwhile, the air supplementing pipeline can be opened to supplement air for the compressor after the compressor is started and the current is stable, and the working energy efficiency of the compressor is guaranteed.
Further, the air conditioning unit start control method of this embodiment, before sending the start instruction to the air make-up control module disposed on the air make-up pipeline of the compressor, further includes the following steps:
first, the current plateau duration is recorded.
When the starting state of the compressor is judged to represent the completion of the starting and the current state of the compressor is judged to represent the stability, the time length from the completion of the starting of the compressor and the current stability to the current moment needs to be recorded and is taken as the current stability time length.
And secondly, judging whether the current stable time reaches a first preset time.
In this embodiment, it is necessary to determine whether the current settling time period reaches a first preset time period in real time, and only when the current settling time period reaches the first preset time period, the start instruction can be sent to the air supply control module disposed on the air supply pipeline of the compressor. Wherein the first preset time period is preferably 3s.
Further, the method for controlling the starting current of the air conditioning unit of the embodiment further comprises the following steps before sending the closing instruction to the air make-up control component:
first, the compressor downtime duration is recorded.
When the acquired control signal of the compressor indicates closing, that is, after the compressor is closed, the time length from the time when the compressor is closed to the current time needs to be recorded, and the time length is used as the shutdown time length of the compressor.
And secondly, judging whether the shutdown time of the compressor reaches a second preset time.
In this embodiment, it is necessary to determine whether the shutdown duration of the compressor reaches the second preset duration in real time, and only after the shutdown duration of the compressor reaches the second preset duration, the shutdown instruction may be sent to the air supply control module disposed on the air supply pipeline of the compressor. Wherein the second preset time period is preferably 3min.
In order to be more comprehensive, the application also provides an air conditioning unit starting current control device corresponding to the air conditioning unit starting current control method provided by the embodiment of the invention.
Fig. 2 is a schematic structural view of an air-conditioning unit start control apparatus according to an embodiment of the present invention, and as shown in fig. 2, the air-conditioning unit start control apparatus according to the embodiment includes:
the acquisition module 11 is used for acquiring a control signal of the compressor in real time;
the acquisition module 12 is configured to acquire a starting mode of the compressor if the control signal indicates to start, and acquire a current value of each period in real time according to a preset period;
a state determining module 13, configured to determine a starting state of the compressor and a current state of the compressor according to the starting manner and the current value in each period;
the instruction sending module 14 is configured to send an opening instruction to an air supply control assembly arranged on an air supply pipeline of the compressor to open the air supply control assembly if the starting state of the compressor indicates that starting is completed and the current state of the compressor indicates that the compressor is stable, and the compressor performs air supply work through the air supply pipeline;
the instruction sending module 14 is further configured to send a closing instruction to the gas supply control assembly if the control signal indicates closing, so that the gas supply control assembly is closed.
The air conditioning unit starting control device of the embodiment sends a closing instruction to the air supplementing control assembly when the control signal of the compressor indicates closing, so that the air supplementing control assembly is closed, when the compressor is started next time, the air supplementing pipeline is in a closed state, the phenomenon that a refrigerant enters a compressor cavity from the air supplementing pipeline when the compressor is started is avoided, the phenomenon that the compressor is started and carries load instantly is avoided, starting current and the starting tripping fault rate of the air conditioning unit are reduced, meanwhile, the air supplementing pipeline can be opened to supplement air for the compressor after the compressor is started and the current is stable, and the working energy efficiency of the compressor is ensured.
Further, in the air conditioning unit start control apparatus of the present embodiment, the state determination module 13 includes: the device comprises a characteristic determining unit, a starting state determining unit and a current state determining unit;
the characteristic determining unit is used for determining starting current change characteristic information corresponding to the starting mode according to the starting current characteristic curve corresponding to the starting mode;
the starting state determining unit is used for determining the starting state of the compressor according to the starting current change characteristic information and the current value of each period;
and the current state determining unit is used for determining the current state of the compressor according to the starting current change characteristic information and the current value of each period if the starting state of the compressor indicates that the starting is finished.
Further, in the air conditioning unit start control apparatus of this embodiment, if the start mode is direct start, the start state determining unit is specifically configured to:
determining a starting completion standard range according to the starting current change characteristic information;
calculating a first average current value of a continuous preset number of periods corresponding to the current period, and taking a current value of a period before the continuous preset number of periods as a first comparative current value;
judging whether a first current ratio between the first average current value and the first comparison current value meets the starting completion standard range or not;
if the first current ratio accords with the starting completion standard range, determining that the starting state of the compressor represents the completion of starting;
and if the first current ratio does not meet the starting completion standard range, determining that the starting state of the compressor indicates that the starting is not completed.
Further, in the air conditioning unit start control apparatus of this embodiment, if the start mode is direct start, the current state determining unit is specifically configured to:
determining a current stable standard range according to the starting current change characteristic information;
calculating a second average current value of a continuous preset number of periods before the current period in real time, and taking the current value of the current period as a second comparative current value;
judging whether a second current ratio between the second comparison current value and the second average current value meets the current stability standard range in real time;
if the second current ratio accords with the current stability standard range, counting the continuous times of the second current ratio according with the current stability standard range in real time;
judging whether the continuous times reach preset times or not;
if the continuous times reach the preset times, determining that the current state of the compressor represents stability;
and if the continuous times do not reach the preset times, determining that the current state of the compressor is not stable.
Further, the air conditioning unit start control apparatus of the present embodiment further includes: the device comprises a recording module and a judging module.
The recording module is used for recording the current stable time length;
the judging module is used for judging whether the current stable time reaches a first preset time;
and the instruction sending module 14 is specifically configured to send an opening instruction to an air supply control assembly arranged on an air supply pipeline of the compressor if the current stabilizing duration reaches the first preset duration.
Further, in the air conditioning unit start control device of the embodiment, the recording module is further configured to record a shutdown duration of the compressor;
the judging module is also used for judging whether the shutdown time of the compressor reaches a second preset time;
and the instruction sending module 14 is specifically configured to send a closing instruction to the air supply control assembly if the last stop of the compressor reaches the second preset duration.
Further, in the air conditioning unit start control apparatus of the present embodiment, the air supply control unit includes: an electric valve.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 3 is a schematic structural diagram provided in an embodiment of an air conditioning unit start control system according to the present invention, and as shown in fig. 3, the air conditioning unit start control system of the present embodiment includes: a processor 21 and a memory 22 connected to the processor 21. The memory 22 is used for storing a computer program for executing at least the air conditioning unit startup current control method according to the above-described embodiment. The processor 21 is used to invoke and execute computer programs.
The air conditioning unit start control system of this embodiment, when the control signal of compressor shows to close, send the close instruction to tonifying qi control assembly, so that tonifying qi control assembly closes, so that when the compressor is opened next time, the tonifying qi pipeline is the closed condition, avoid the compressor to open refrigerant from tonifying qi pipeline entering compressor intracavity in the twinkling of an eye, thereby avoid the compressor to start the area load in the twinkling of an eye, starting current and air conditioning unit start tripping fault rate have been reduced, can also open the tonifying qi pipeline after the compressor starts to accomplish and the electric current is steady simultaneously and for the compressor tonifying qi, guarantee the work efficiency of compressor.
FIG. 4 is a schematic structural diagram of an air conditioning assembly according to an embodiment of the present invention; as shown in fig. 4, the air conditioning unit of the present embodiment includes: a compressor 31 and an air conditioning unit start control system 32 according to the above embodiment. An air supply control component 32 is arranged on an air supply pipeline of the compressor 31. The air conditioning unit starting current control system 32 is respectively connected with the compressor 31 and the air supply control assembly 32.
The air conditioning unit of this embodiment, when the control signal of compressor shows to close, send close instruction to tonifying qi control assembly, so that tonifying qi control assembly closes, so that when the compressor is opened next time, the tonifying qi pipeline is closed, avoid the compressor to open refrigerant from tonifying qi pipeline entering compressor intracavity in the twinkling of an eye, thereby avoid the compressor to start the load in the twinkling of an eye, starting current and air conditioning unit start-up tripping fault rate have been reduced, can also open the tonifying qi pipeline for the compressor tonifying qi after the compressor starts to accomplish and the electric current is steady simultaneously, guarantee the work energy efficiency of compressor.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment 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.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (12)
1. An air conditioning unit starting control method is characterized by comprising the following steps:
acquiring a control signal of a compressor in real time;
if the control signal indicates starting, acquiring a starting mode of the compressor, and acquiring a current value of each period in real time according to a preset period;
determining the starting state of the compressor and the current state of the compressor according to the starting mode and the current value of each period;
if the starting state of the compressor indicates that the starting is finished and the current state of the compressor indicates stable, sending a starting instruction to an air supplementing control assembly arranged on an air supplementing pipeline of the compressor so as to open the air supplementing control assembly, and carrying out air supplementing work on the compressor through the air supplementing pipeline;
and if the control signal represents closing, sending a closing instruction to the air supply control assembly to close the air supply control assembly.
2. The air conditioning unit starting control method according to claim 1, wherein the determining the starting state of the compressor and the current state of the compressor according to the starting mode and the current value of each period comprises:
determining starting current change characteristic information corresponding to the starting mode according to the starting current characteristic curve corresponding to the starting mode;
determining the starting state of the compressor according to the starting current change characteristic information and the current value of each period;
and if the starting state of the compressor indicates that the starting is finished, determining the current state of the compressor according to the starting current change characteristic information and the current value of each period.
3. The air conditioning unit starting control method according to claim 2, wherein if the starting mode is direct starting, the determining the starting state of the compressor according to the starting current variation characteristic information and the current value of each cycle includes:
determining a starting completion standard range according to the starting current change characteristic information;
calculating a first average current value of a continuous preset number of periods corresponding to the current period, and taking a current value of a period before the continuous preset number of periods as a first comparative current value;
judging whether a first current ratio between the first average current value and the first comparison current value meets the starting completion standard range or not;
if the first current ratio accords with the starting completion standard range, determining that the starting state of the compressor represents the completion of starting;
and if the first current ratio does not meet the starting completion standard range, determining that the starting state of the compressor indicates that the starting is not completed.
4. The air conditioning unit starting control method according to claim 2, wherein if the starting mode is direct starting, the determining the current state of the compressor according to the starting current variation characteristic information and the current value of each period includes:
determining a current stable standard range according to the starting current change characteristic information;
calculating a second average current value of a continuous preset number of periods before the current period in real time, and taking the current value of the current period as a second comparative current value;
judging whether a second current ratio between the second comparison current value and the second average current value meets the current stability standard range in real time;
if the second current ratio accords with the current stability standard range, counting the continuous times of the second current ratio according with the current stability standard range in real time;
judging whether the continuous times reach preset times or not;
if the continuous times reach the preset times, determining that the current state of the compressor represents stability;
and if the continuous times do not reach the preset times, determining that the current state of the compressor is not stable.
5. The air conditioning unit start-up control method according to claim 1, wherein before sending the start instruction to the air make-up control component disposed on the air make-up pipeline of the compressor, the method further comprises:
recording the current stable time length;
judging whether the current stabilization duration reaches a first preset duration or not;
send the opening instruction to the tonifying qi control module that sets up on the tonifying qi pipeline of compressor, include:
and if the current stabilizing time length reaches the first preset time length, sending an opening instruction to an air supplementing control assembly arranged on an air supplementing pipeline of the compressor.
6. The air conditioning unit start-up control method according to claim 1, wherein before sending the close command to the air make-up control module, the method further comprises:
recording the shutdown time of the compressor;
judging whether the shutdown time of the compressor reaches a second preset time;
the sending a closing instruction to the air supply control assembly comprises:
and if the last time the compressor stops reaches the second preset duration, sending a closing instruction to the air supply control assembly.
7. The air conditioning unit start-up control method according to claim 1, wherein the air make-up control module includes: an electric valve.
8. An air conditioning unit start control device characterized by comprising:
the acquisition module is used for acquiring a control signal of the compressor in real time;
the acquisition module is used for acquiring the starting mode of the compressor if the control signal indicates starting, and acquiring the current value of each period in real time according to the preset period;
the state determining module is used for determining the starting state of the compressor and the current state of the compressor according to the starting mode and the current value of each period;
the instruction sending module is used for sending a starting instruction to an air supply control assembly arranged on an air supply pipeline of the compressor to open the air supply control assembly if the starting state of the compressor indicates that the starting is finished and the current state of the compressor indicates that the compressor is stable, and the compressor performs air supply work through the air supply pipeline;
the instruction sending module is further configured to send a closing instruction to the air supply control assembly if the control signal indicates closing, so that the air supply control assembly is closed.
9. An air conditioning unit start control apparatus according to claim 8, characterized in that the state determination module includes: the device comprises a characteristic determining unit, a starting state determining unit and a current state determining unit;
the characteristic determining unit is used for determining starting current change characteristic information corresponding to the starting mode according to the starting current characteristic curve corresponding to the starting mode;
the starting state determining unit is used for determining the starting state of the compressor according to the starting current change characteristic information and the current value of each period;
and the current state determining unit is used for determining the current state of the compressor according to the starting current change characteristic information and the current value of each period if the starting state of the compressor indicates that the starting is finished.
10. An air conditioning unit start control apparatus according to claim 8, characterized by further comprising: the device comprises a recording module and a judging module;
the recording module is used for recording the stable duration of the current;
the judging module is used for judging whether the current stable time length reaches a first preset time length or not;
the instruction sending module is further configured to send an opening instruction to an air supply control assembly arranged on an air supply pipeline of the compressor if the current stabilizing duration reaches the first preset duration.
11. An air conditioning unit start control system, characterized by comprising: a processor and a memory coupled to the processor;
the memory is used for storing a computer program at least for executing the air conditioning unit starting control method according to any one of claims 1 to 7;
the processor is used for calling and executing the computer program.
12. An air conditioning assembly, comprising: a compressor and an air conditioning unit start-up control system as claimed in claim 11;
an air supply control assembly is arranged on an air supply pipeline of the compressor;
and the starting current control system of the air conditioning unit is respectively connected with the compressor and the air supply control component.
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| CN113983653A (en) | 2022-01-28 |
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