CN111692706A - Defrosting control method and device and air conditioner - Google Patents
Defrosting control method and device and air conditioner Download PDFInfo
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- CN111692706A CN111692706A CN202010504608.3A CN202010504608A CN111692706A CN 111692706 A CN111692706 A CN 111692706A CN 202010504608 A CN202010504608 A CN 202010504608A CN 111692706 A CN111692706 A CN 111692706A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
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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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- Air Conditioning Control Device (AREA)
Abstract
The invention provides a defrosting control method, a defrosting control device and an air conditioner, wherein the method comprises the following steps: acquiring operation parameters of an outdoor unit in a heating mode; calculating a low-voltage attenuation rate of the outdoor unit and a current increase rate of an external fan according to the operating parameters of the outdoor unit; judging whether the air conditioner meets the defrosting condition or not according to the low-voltage attenuation rate and the current increase rate; and if the air conditioner meets the defrosting condition, controlling the air conditioner to enter a defrosting mode. Therefore, by calculating the low-pressure attenuation rate of the outdoor unit and the external fan current increase rate as the defrosting control conditions, the frosting condition of the outdoor unit can be intuitively reflected due to the external fan current increase rate, the condition whether the frosting of the whole outdoor unit is uniform or not is reflected by the low-pressure attenuation rate of the outdoor unit, and the problems of untimely defrosting and frost-free defrosting caused by temperature control and time control are solved by combining the low-pressure attenuation rate and the current increase rate.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a defrosting control method and device and an air conditioner.
Background
When the air conditioner is operated for heating for a long time, the temperature of the finned tubes of the outdoor unit is continuously reduced, the air around the finned tubes exchanges heat with the finned tubes, when the surface temperature of the finned tubes is lower than the dew point temperature, the air around the finned tubes is condensed on the finned tubes to form a frost layer, the air humidity is increased along with the long-time increase of the heating operation, the frost is thicker and thicker, and the capacity attenuation amplitude is larger. Accordingly, defrosting the air conditioning system in an appropriate time may improve the performance of the system.
The conventional defrosting method is to defrost by using the tube temperature of the outdoor unit and a heating operation time control system, when in heating operation, a refrigerant in the outdoor unit exchanges heat with outdoor air, the temperature and the humidity of the outdoor air directly influence the tube temperature of the outdoor unit, and the conditions of defrosting in the prior art are mostly obtained according to test experiences under partial working conditions.
Therefore, the existing defrosting method using the temperature and time of the tube as the condition for entering defrosting causes the phenomenon that the system is not defrosted timely or defrosted frequently.
Disclosure of Invention
The invention solves the problem that the prior air conditioner uses the temperature of the pipe and the time as the conditions for entering into the defrosting process to cause the phenomenon that the defrosting of the system is not in time or the defrosting is frequent.
To solve the above problems, the present invention provides a defrosting control method, which includes:
acquiring operation parameters of an outdoor unit in a heating mode;
calculating a low-voltage attenuation rate of the outdoor unit and a current increase rate of an external fan according to the operating parameters of the outdoor unit;
judging whether the air conditioner meets the defrosting condition or not according to the low-voltage attenuation rate and the current increase rate;
and if the air conditioner meets the defrosting condition, controlling the air conditioner to enter a defrosting mode.
Therefore, by calculating the low-pressure attenuation rate of the outdoor unit and the external fan current increase rate as the defrosting control conditions, the frosting condition of the outdoor unit can be intuitively reflected due to the external fan current increase rate, the condition whether the frosting of the whole outdoor unit is uniform or not is reflected by the low-pressure attenuation rate of the outdoor unit, and the problems of untimely defrosting and frost-free defrosting caused by temperature control and time control are solved by combining the low-pressure attenuation rate and the current increase rate.
Optionally, in the heating mode, in obtaining the operation parameters of the outdoor unit, the operation parameters of the outdoor unit start to be obtained after the outdoor unit exits from the starting platform.
Therefore, the operation parameters of the outdoor unit are obtained after the outdoor unit exits from the starting platform, and the operation of each parameter tends to be stable after the outdoor unit exits from the starting platform, so that the error between the obtained operation parameters and the actual value is reduced.
Optionally, the operation parameters of the outdoor unit include: the current low pressure, the highest low pressure, the initial current value of the external fan and the current value.
Therefore, the current low-pressure, the highest low-pressure, the initial current value of the external fan and the current value are obtained, so that the frosting condition of the outdoor unit and the condition of whether the frosting of the whole outdoor unit is uniform are conveniently and directly reflected, and whether the air conditioner meets the defrosting condition or not is further conveniently judged.
Optionally, in the heating mode, obtaining an operation parameter of the outdoor unit includes:
judging whether the outdoor unit exits from a starting platform or not in a heating mode;
if the outdoor unit exits from the starting platform, detecting the low-pressure of the outdoor unit and the current value of the external fan in real time;
determining the current low-pressure, the highest low-pressure, the initial current value and the current value of the external fan according to the real-time detected low-pressure of the outdoor unit and the current value of the external fan;
the current low-pressure and the current value are the low-pressure of the outdoor unit and the current value of the external fan detected in real time at the current moment, the initial current value is the current value of the external fan detected when the outdoor unit exits from the starting platform, and the highest low-pressure is the highest value of all low-pressure pressures of the outdoor unit detected from the time when the outdoor unit exits from the starting platform to the current moment.
Therefore, whether the outdoor unit exits from the starting platform or not is judged, after the outdoor unit is confirmed to exit from the starting platform, the low-pressure of the outdoor unit and the current value of the external fan are detected in real time, so that the obtained parameter values are accurate and are close to the real values, the frosting condition of the outdoor unit and the frosting condition of the whole outdoor unit are reflected to be real and accurate, and the possibility of misjudgment is reduced.
Optionally, the low pressure decay rate of the outdoor unit is a ratio of a difference between the highest low pressure and the current low pressure to the highest low pressure.
Therefore, whether the frosting of the whole outdoor unit is uniform or not can be reflected conveniently by calculating the low-pressure attenuation rate of the outdoor unit, so that the current condition whether the frosting of the whole outdoor unit is uniform or not can be mastered in real time, and the judgment of whether the defrosting operation is required or not is further facilitated.
Optionally, the current increase rate of the outer fan is a ratio of a difference value between the current value and the initial current value to the initial current value.
Therefore, the frosting condition of the outdoor unit can be conveniently and visually reflected by calculating the current increase rate, and the judgment of whether the defrosting operation is required is further facilitated.
Optionally, the determining whether the air conditioner meets the defrosting condition according to the low-voltage attenuation rate and the current increase rate includes:
acquiring a first operation time length of which the low-voltage attenuation rate is greater than a preset attenuation rate and the low-voltage attenuation rate at the current moment;
acquiring a second operation time length of which the current increase rate is greater than a preset increase rate and the current increase rate at the current moment;
and judging whether the first operation time length, the low-voltage attenuation rate at the current moment, the second operation time length and the current increase rate at the current moment meet the defrosting condition or not.
Therefore, when the low-voltage attenuation rate is greater than the preset attenuation rate and the current increase rate is greater than the preset increase rate, the corresponding first operation time and the second operation time, and the low-voltage attenuation rate and the current increase rate at the current moment are obtained, the low-voltage attenuation rate and the current increase rate at the current moment are convenient to update in real time, the current frosting condition of the outdoor unit is mastered in real time, and whether defrosting operation is needed or not is convenient to judge.
Optionally, the obtaining a first operation duration that the low-voltage attenuation rate is greater than a preset attenuation rate and the low-voltage attenuation rate at the current time includes:
obtaining the low-voltage attenuation rate at the current moment, and judging whether the low-voltage attenuation rate is greater than a preset attenuation rate or not;
if the low-voltage attenuation rate is greater than the preset attenuation rate, recording the first operation time length;
and if the low-voltage attenuation rate is less than or equal to the preset attenuation rate, clearing the first operation time length.
Therefore, when the low-pressure attenuation rate is greater than the preset attenuation rate, the air conditioner is frosted at this time but the defrosting operation is not needed, so that the current first operation time length needs to be correspondingly recorded so as to further judge whether the defrosting operation needs to be carried out in time or not, and when the low-pressure attenuation rate is less than or equal to the preset attenuation rate, the first operation time length is reset, so that the frequent defrosting operation is avoided.
Optionally, the air conditioner is determined to meet the defrost condition when:
the first operating duration is greater than a first preset duration,
and the low-voltage attenuation rate at the current moment is greater than the preset attenuation rate,
and the second operation time length is longer than a second preset time length,
and the current increase rate at the current moment is greater than the preset increase rate.
Therefore, when the low-voltage attenuation rate at the current moment is greater than the preset attenuation rate, the first operation time is greater than the preset time, the current increase rate at the current moment is greater than the preset increase rate, and the second operation time is greater than the second preset time, and the conditions are met, the defrosting operation is performed, and the condition that the defrosting is not timely is avoided.
Secondly, provide a defrosting control device, it includes:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the operation parameters of the outdoor unit in a heating mode;
a calculating unit for calculating a low voltage attenuation rate of the outdoor unit and a current increase rate of an external fan according to an operation parameter of the outdoor unit;
the judging unit is used for judging whether the air conditioner meets the defrosting condition or not according to the low-voltage attenuation rate and the current increase rate;
and the control unit is used for controlling the air conditioner to enter a defrosting mode if the air conditioner meets defrosting conditions.
Therefore, by calculating the low-pressure attenuation rate of the outdoor unit and the external fan current increase rate as the defrosting control conditions, the frosting condition of the outdoor unit can be intuitively reflected due to the external fan current increase rate, the condition whether the frosting of the whole outdoor unit is uniform or not is reflected by the low-pressure attenuation rate of the outdoor unit, and the problems of untimely defrosting and frost-free defrosting caused by temperature control and time control are solved by combining the low-pressure attenuation rate and the current increase rate.
There is again provided an air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the defrost control method as described above.
Therefore, by calculating the low-pressure attenuation rate of the outdoor unit and the external fan current increase rate as the defrosting control conditions, the frosting condition of the outdoor unit can be intuitively reflected due to the external fan current increase rate, the condition whether the frosting of the whole outdoor unit is uniform or not is reflected by the low-pressure attenuation rate of the outdoor unit, and the problems of untimely defrosting and frost-free defrosting caused by temperature control and time control are solved by combining the low-pressure attenuation rate and the current increase rate.
Finally, a computer-readable storage medium is provided, in which a computer program is stored, which, when read and executed by a processor, implements the above-described defrost control method.
Therefore, by calculating the low-pressure attenuation rate of the outdoor unit and the external fan current increase rate as the defrosting control conditions, the frosting condition of the outdoor unit can be intuitively reflected due to the external fan current increase rate, the condition whether the frosting of the whole outdoor unit is uniform or not is reflected by the low-pressure attenuation rate of the outdoor unit, and the problems of untimely defrosting and frost-free defrosting caused by temperature control and time control are solved by combining the low-pressure attenuation rate and the current increase rate.
Drawings
FIG. 1 is a flow chart of a defrost control method according to one embodiment of the present invention;
FIG. 2 is a flow chart of a defrost control method according to another embodiment of the present invention;
FIG. 3 is a flow chart of a defrost control method according to yet another embodiment of the present invention;
FIG. 4 is a flow chart of a defrost control method according to yet another embodiment of the present invention;
FIG. 5 is a flow chart of a defrost control method according to yet another embodiment of the present invention;
fig. 6 is a block diagram of a defrosting control apparatus according to an embodiment of the present invention.
Description of reference numerals:
1-an obtaining unit, 2-a calculating unit, 3-a judging unit and 4-a control unit.
Detailed Description
For easy understanding, in the present invention, technical problems therein need to be elaborated.
When the air conditioner is operated for heating for a long time, the temperature of the finned tubes of the outdoor unit is continuously reduced, the air around the finned tubes exchanges heat with the finned tubes, when the surface temperature of the finned tubes is lower than the dew point temperature, the air around the finned tubes is condensed on the finned tubes to form a frost layer, the air humidity is increased along with the long-time increase of the heating operation, the frost is thicker and thicker, and the capacity attenuation amplitude is larger. Accordingly, defrosting the air conditioning system in an appropriate time may improve the performance of the system.
The currently common defrosting method is to defrost by the pipe temperature of the outdoor unit and the heating operation time control system. During heating operation, the refrigerant in the outdoor unit exchanges heat with outdoor air, and the temperature and humidity of the outdoor air directly influence the temperature of the outdoor unit tubes. Moreover, the conditions of the currently adopted pipe for entering into the defrosting mode within a long time are mostly obtained according to test experiences under partial working conditions:
(1) when the outdoor temperature is the same but the humidity is different, the frosting condition of the outdoor unit is different, the frosting duration is different, but the outdoor unit only corresponds to one defrosting temperature under the same environment temperature, and when the humidity is higher, the defrosting is not in time; when the humidity is low, the system is defrosted, and frost may not be formed.
(2) When the frosting is not uniform, if the pipeline just distributed with the defrosting temperature points is not frosted, the cooling speed at the pipeline temperature is slow, the pipeline temperature can not reach the preset value all the time, and other pipelines are frosted seriously, so that the system can not defrost at the moment.
Therefore, using tubing temperature and time as conditions for entering defrost will result in a situation where the system is not defrosted in time or is defrosted frequently. Therefore, it is necessary to provide a device capable of intuitively judging the frosting condition of the external unit under various working conditions and uneven frosting conditions and a condition for timely defrosting.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The disclosed embodiments provide a defrost control method that may be performed by a defrost control device that may be integrated into an electronic device such as an air conditioner, a multi-split air conditioner, an air conditioner control device, and the like. Fig. 1 is a flowchart of a defrost control method according to an embodiment of the present invention; the defrosting control method comprises the following steps:
And 200, calculating a low-voltage attenuation rate of the outdoor unit and a current increase rate of an external fan according to the operation parameters of the outdoor unit.
And step 300, judging whether the air conditioner meets the defrosting condition or not according to the low-voltage attenuation rate and the current increase rate.
And step 400, if the air conditioner meets the defrosting condition, controlling the air conditioner to enter a defrosting mode.
According to the defrosting control method and the defrosting control device, the low-pressure attenuation rate of the outdoor unit and the external fan current increase rate are calculated to serve as defrosting control conditions, the frosting condition of the outdoor unit can be directly reflected by the external fan current increase rate, the condition whether frosting of the whole outdoor unit is uniform or not is reflected by the low-pressure attenuation rate of the outdoor unit, and the problems that defrosting is not timely and frosting is not caused due to temperature control and time control are solved by the mode of combining the low-pressure attenuation rate and the current increase rate.
Specifically, the current value can visually reflect the frosting condition of the outdoor unit, when the outdoor unit is not frosted, the current value of the external fan is basically unchanged, the current value is rapidly increased after the outdoor unit starts frosting until fins of the outdoor unit are blocked, the current value is not continuously increased after the air volume is basically unchanged, and once the condition of uneven frosting occurs, misjudgment can occur only by reflecting the frosting condition according to the current value. Therefore, the low-pressure of the system is detected at the same time, the low pressure before entering the air separator is detected by the low-pressure, the frosting condition of the whole outdoor unit is reflected, and the low pressure of the system is still continuously reduced when frosting is not uniform. The conditions of untimely defrosting and frost-free defrosting in the process of controlling the temperature and time are solved by combining the increase rate of the current and the low-voltage attenuation rate, and meanwhile, the problem of late defrosting caused by uneven frosting under the condition of current defrosting is prevented, the system performance and stability are improved, and a better experience effect is brought to a user.
In the step 100, in the heating mode, the operation parameters of the outdoor unit are obtained after the outdoor unit exits from the starting platform.
According to the scheme, the operation parameters of the outdoor unit are acquired after the outdoor unit exits from the starting platform, and the operation of each parameter tends to be stable after the outdoor unit exits from the starting platform, so that errors between the acquired operation parameters and actual values are reduced.
More specifically, as shown in fig. 2, it is a flowchart of a defrost control method according to another embodiment of the present invention; as shown in fig. 2, the step 100 of acquiring the operation parameters of the outdoor unit in the heating mode includes:
and step 110, judging whether the outdoor unit exits from the starting platform or not in the heating mode.
And 120, detecting the low pressure of the outdoor unit and the current value of the external fan in real time if the outdoor unit exits from the starting platform.
And step 130, determining the current low-pressure, the highest low-pressure, the initial current value of the external fan and the current value according to the low-pressure of the outdoor unit and the current value of the external fan detected in real time.
The current low-pressure and the current value are the low-pressure of the outdoor unit and the current value of the external fan detected in real time at the current moment, the initial current value is the current value of the external fan detected when the outdoor unit exits from the starting platform, and the highest low-pressure is the highest value of all low-pressure pressures of the outdoor unit detected from the time when the outdoor unit exits from the starting platform to the current moment.
According to the scheme, whether the outdoor unit exits from the starting platform or not is judged, after the outdoor unit is confirmed to exit from the starting platform, the low-pressure of the outdoor unit and the current value of the external fan are detected in real time, so that the obtained parameter values are accurate and are close to real values, the frosting condition of the outdoor unit and the frosting condition of the whole outdoor unit are reflected to be real and accurate, and the possibility of wrong judgment is reduced.
Specifically, the operation parameters of the outdoor unit include: the current low pressure, the highest low pressure, the initial current value of the external fan and the current value.
Therefore, the current low-pressure, the highest low-pressure, the initial current value of the external fan and the current value are obtained, so that the frosting condition of the outdoor unit and the condition of whether the frosting of the whole outdoor unit is uniform are conveniently and directly reflected, and whether the air conditioner meets the defrosting condition or not is further conveniently judged.
Wherein the low pressure decay rate of the outdoor unit is a ratio of a difference between the highest low pressure and the current low pressure to the highest low pressure.
That is, the calculated low voltage decay rate satisfies the equation:
wherein D is a low-pressure attenuation rate, Pd0 is the highest low-pressure in the actual operation delta T of the air conditioner, and Pd is the current actual operation low-pressure of the system.
The condition of whether the frosting of the whole outdoor unit is uniform or not can be conveniently reflected by calculating the low-pressure attenuation rate of the outdoor unit, so that the condition of whether the frosting of the whole outdoor unit is uniform or not can be mastered in real time, and the judgment of whether the defrosting operation is required or not is further facilitated.
Wherein the current increase rate of the outer fan is a ratio of a difference value of the present current value and the initial current value to the initial current value.
That is, the calculated current increase rate satisfies the following equation:
wherein, E is the current increase rate, I1 is the current value of the outdoor fan detected in real time, and I0 is the current value of the outdoor fan when the outdoor unit of the air conditioner exits the start mode.
The current increase rate is calculated, so that the frosting condition of the outdoor unit can be conveniently and visually reflected, and the judgment of whether the defrosting operation is required or not is further facilitated.
Specifically, as shown in fig. 3, it is a flowchart of a defrosting control method according to still another embodiment of the present invention; as shown in fig. 3, the step 300 of determining whether the air conditioner meets the defrosting condition according to the low voltage attenuation rate and the current increase rate includes:
And 320, acquiring a second operation time length of which the current increase rate is greater than a preset increase rate and the current increase rate at the current moment.
When the low-voltage attenuation rate is greater than the preset attenuation rate and the current increase rate is greater than the preset increase rate, the corresponding first operation time length and the second operation time length, and the low-voltage attenuation rate and the current increase rate at the current moment are obtained, so that the low-voltage attenuation rate and the current increase rate at the current moment are conveniently updated in real time, the current frosting condition of the outdoor unit is mastered in real time, and whether defrosting operation is needed or not is conveniently judged.
Specifically, as shown in fig. 4, it is a flowchart of a defrosting control method according to still another embodiment of the present invention; as shown in fig. 4, the step 310 of obtaining the first operation duration in which the low voltage attenuation rate is greater than the preset attenuation rate and the low voltage attenuation rate at the current time includes:
and 311, acquiring the low-voltage attenuation rate at the current moment, and judging whether the low-voltage attenuation rate is greater than a preset attenuation rate.
In step 312, if the low voltage attenuation rate is greater than the preset attenuation rate, the first operation duration is recorded.
And 313, if the low-voltage attenuation rate is less than or equal to the preset attenuation rate, clearing the first operation time length.
In the scheme, when the low-pressure attenuation rate is greater than the preset attenuation rate, the air conditioner is frosted at this time but the defrosting operation is not needed, so that the current first operation time length needs to be correspondingly recorded so as to further judge whether the defrosting operation needs to be carried out in time or not, and when the low-pressure attenuation rate is less than or equal to the preset attenuation rate, the first operation time length is reset, so that the frequent defrosting operation is avoided.
Fig. 5 is a flowchart of a defrost control method according to yet another embodiment of the present invention; as shown in fig. 5, the step 320 of obtaining the second operation duration in which the current increase rate is greater than the preset increase rate and the current increase rate at the current moment includes:
In the scheme, when the current increase rate is greater than the preset increase rate, the air conditioner is frosted at this time but defrosting operation is not needed, so that the current second operation time length needs to be correspondingly recorded so as to further judge whether timely defrosting operation needs to be carried out or not, and when the current increase rate is less than or equal to the preset increase rate, the second operation time length is reset, frequent defrosting operation is avoided, and the performance and the stability of the system are improved.
Determining that the air conditioner meets the defrosting condition when the following conditions are satisfied:
the first operating duration is greater than a first preset duration,
and the low-voltage attenuation rate at the current moment is greater than the preset attenuation rate,
and the second operation time length is longer than a second preset time length,
and the current increase rate at the current moment is greater than the preset increase rate.
The low-voltage attenuation rate at the current moment is greater than the preset attenuation rate, the first operation time is greater than the preset time, the current increase rate at the current moment is greater than the preset increase rate, the second operation time is greater than the second preset time, and when the conditions are met, the defrosting operation is performed, so that the situation that defrosting is not timely is avoided.
Wherein, the preset low-pressure attenuation rate d mentioned in the invention ranges from 30% to 35%; presetting the value range of the current increase rate e to be 18-22%; the value range of the first preset operation time delta t1 is 1-3 min, and the value range of the second preset operation time delta t2 is 2-4 min.
The embodiment of the present disclosure provides a defrosting control device for implementing the defrosting control method of the present disclosure, and the defrosting control device is described in detail below.
As shown in fig. 6, the defrosting control apparatus includes:
an obtaining unit 1, configured to obtain an operation parameter of an outdoor unit in a heating mode;
a calculating unit 2 for calculating a low voltage attenuation rate of the outdoor unit and a current increase rate of an external fan according to an operation parameter of the outdoor unit;
a judging unit 3 for judging whether the air conditioner meets a defrosting condition according to the low-voltage attenuation rate and the current increase rate;
and the control unit 4 is used for controlling the air conditioner to enter a defrosting mode if the air conditioner meets defrosting conditions.
Therefore, by calculating the low-pressure attenuation rate of the outdoor unit and the external fan current increase rate as the defrosting control conditions, the frosting condition of the outdoor unit can be intuitively reflected due to the external fan current increase rate, the condition whether the frosting of the whole outdoor unit is uniform or not is reflected by the low-pressure attenuation rate of the outdoor unit, and the problems of untimely defrosting and frost-free defrosting caused by temperature control and time control are solved by combining the low-pressure attenuation rate and the current increase rate.
Optionally, in the heating mode, the obtaining unit 1 obtains the operation parameters of the outdoor unit, and the operation parameters of the outdoor unit start to be obtained after the outdoor unit exits from the starting platform.
Optionally, the operation parameters of the outdoor unit include: the current low pressure, the highest low pressure, the initial current value of the external fan and the current value.
Optionally, the acquiring unit 1 acquires the operation parameters of the outdoor unit in the heating mode, and includes:
judging whether the outdoor unit exits from a starting platform or not in a heating mode;
if the outdoor unit exits from the starting platform, detecting the low-pressure of the outdoor unit and the current value of the external fan in real time;
determining the current low-pressure, the highest low-pressure, the initial current value and the current value of the external fan according to the real-time detected low-pressure of the outdoor unit and the current value of the external fan;
the current low-pressure and the current value are the low-pressure of the outdoor unit and the current value of the external fan detected in real time at the current moment, the initial current value is the current value of the external fan detected when the outdoor unit exits from the starting platform, and the highest low-pressure is the highest value of all low-pressure pressures of the outdoor unit detected from the time when the outdoor unit exits from the starting platform to the current moment.
Alternatively, the low pressure decay rate of the outdoor unit in the calculation unit 2 is a ratio of a difference between the highest low pressure and the current low pressure to the highest low pressure.
Optionally, the current increase rate of the external fan in the computing unit 2 is a ratio of a difference value between the current value and the initial current value to the initial current value.
Optionally, the determining unit 3 determines whether the air conditioner meets the defrosting condition according to the low voltage attenuation rate and the current increase rate, and includes:
the obtaining unit 1 obtains a first operation time length when the low-voltage attenuation rate is greater than a preset attenuation rate and the low-voltage attenuation rate at the current moment;
the obtaining unit 1 obtains a second operation duration in which the current increase rate is greater than a preset increase rate and the current increase rate at the present moment;
the judging unit 3 judges whether the first operation time length, the low voltage attenuation rate at the current time, the second operation time length, and the current increase rate at the current time meet the defrosting condition.
Optionally, the obtaining unit 1 obtains a first operation duration that the low voltage attenuation rate is greater than a preset attenuation rate and the low voltage attenuation rate at the current time, and includes:
the obtaining unit 1 obtains the low-voltage attenuation rate at the current moment, and judges whether the low-voltage attenuation rate is greater than a preset attenuation rate;
if the low-voltage attenuation rate is greater than the preset attenuation rate, recording the first operation time length;
and if the low-voltage attenuation rate is less than or equal to the preset attenuation rate, clearing the first operation time length.
Alternatively, the control unit 4 determines that the air conditioner meets the defrosting condition when the following conditions are satisfied:
the first operating duration is greater than a first preset duration,
and the low-voltage attenuation rate at the current moment is greater than the preset attenuation rate,
and the second operation time length is longer than a second preset time length,
and the current increase rate at the current moment is greater than the preset increase rate.
An embodiment of the present disclosure provides an air conditioner, including a computer readable storage medium storing a computer program and a processor, where the computer program is read and executed by the processor to implement the defrosting control method as described above.
Therefore, by calculating the low-pressure attenuation rate of the outdoor unit and the external fan current increase rate as the defrosting control conditions, the frosting condition of the outdoor unit can be intuitively reflected due to the external fan current increase rate, the condition whether the frosting of the whole outdoor unit is uniform or not is reflected by the low-pressure attenuation rate of the outdoor unit, and the problems of untimely defrosting and frost-free defrosting caused by temperature control and time control are solved by combining the low-pressure attenuation rate and the current increase rate.
The disclosed embodiments also provide a computer-readable storage medium storing instructions, which when loaded and executed by a processor, can implement the aforementioned defrost control method.
The technical solution of the embodiment of the present invention essentially or partially contributes to the prior art, or all or part of the technical solution may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be an air conditioner, a refrigeration device, a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method of the embodiment of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
Therefore, by calculating the low-pressure attenuation rate of the outdoor unit and the external fan current increase rate as the defrosting control conditions, the frosting condition of the outdoor unit can be intuitively reflected due to the external fan current increase rate, the condition whether the frosting of the whole outdoor unit is uniform or not is reflected by the low-pressure attenuation rate of the outdoor unit, and the problems of untimely defrosting and frost-free defrosting caused by temperature control and time control are solved by combining the low-pressure attenuation rate and the current increase rate.
It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. 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.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. A defrost control method, comprising:
acquiring operation parameters of an outdoor unit in a heating mode;
calculating a low-voltage attenuation rate of the outdoor unit and a current increase rate of an external fan according to the operating parameters of the outdoor unit;
judging whether the air conditioner meets the defrosting condition or not according to the low-voltage attenuation rate and the current increase rate;
and if the air conditioner meets the defrosting condition, controlling the air conditioner to enter a defrosting mode.
2. The defrost control method of claim 1, wherein in the heating mode, the operation parameters of the outdoor unit are obtained after the outdoor unit exits the start-up platform.
3. The defrost control method of claim 1, wherein the operating parameters of the outdoor unit comprise: the current low pressure, the highest low pressure, the initial current value of the external fan and the current value.
4. The defrost control method of claim 3, wherein the obtaining of the operating parameters of the outdoor unit in the heating mode comprises:
judging whether the outdoor unit exits from a starting platform or not in a heating mode;
if the outdoor unit exits from the starting platform, detecting the low-pressure of the outdoor unit and the current value of the external fan in real time;
determining the current low-pressure, the highest low-pressure, the initial current value and the current value of the external fan according to the real-time detected low-pressure of the outdoor unit and the current value of the external fan;
the current low-pressure and the current value are the low-pressure of the outdoor unit and the current value of the external fan detected in real time at the current moment, the initial current value is the current value of the external fan detected when the outdoor unit exits from the starting platform, and the highest low-pressure is the highest value of all low-pressure pressures of the outdoor unit detected from the time when the outdoor unit exits from the starting platform to the current moment.
5. The defrost control method of claim 3, wherein the low pressure decay rate of the outdoor unit is a ratio of a difference of the highest low pressure and the current low pressure to the highest low pressure.
6. The defrost control method of claim 3, wherein the current increase rate of the outer fan is a ratio of a difference of the present current value and the initial current value to the initial current value.
7. The defrost control method of any one of claims 1-6, wherein said determining whether the air conditioner meets a defrost condition based on the low voltage decay rate and the current increase rate comprises:
acquiring a first operation time length of which the low-voltage attenuation rate is greater than a preset attenuation rate and the low-voltage attenuation rate at the current moment;
acquiring a second operation time length of which the current increase rate is greater than a preset increase rate and the current increase rate at the current moment;
and judging whether the first operation time length, the low-voltage attenuation rate at the current moment, the second operation time length and the current increase rate at the current moment meet the defrosting condition or not.
8. The defrost control method of claim 7, wherein said obtaining the low pressure decay rate for the first operating period in which the low pressure decay rate is greater than a preset decay rate and the current time the low pressure decay rate comprises:
obtaining the low-voltage attenuation rate at the current moment, and judging whether the low-voltage attenuation rate is greater than a preset attenuation rate or not;
if the low-voltage attenuation rate is greater than the preset attenuation rate, recording the first operation time length;
and if the low-voltage attenuation rate is less than or equal to the preset attenuation rate, clearing the first operation time length.
9. The defrost control method of claim 7, wherein the air conditioner is determined to meet the defrost condition when:
the first operating duration is greater than a first preset duration,
and the low-voltage attenuation rate at the current moment is greater than the preset attenuation rate,
and the second operation time length is longer than a second preset time length,
and the current increase rate at the current moment is greater than the preset increase rate.
10. A defrost control apparatus, comprising:
the device comprises an acquisition unit (1) for acquiring the operation parameters of the outdoor unit in a heating mode;
a calculation unit (2) for calculating a low voltage attenuation rate of the outdoor unit and a current increase rate of an external fan according to an operation parameter of the outdoor unit;
a judging unit (3) for judging whether the air conditioner meets the defrosting condition according to the low-voltage attenuation rate and the current increase rate;
a control unit (4) for controlling the air conditioner to enter a defrost mode if the air conditioner meets a defrost condition.
11. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the defrost control method according to any one of claims 1-9.
12. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the defrost control method according to any of claims 1-9.
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| CN111692706B (en) | 2022-07-19 |
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Effective date of registration: 20221014 Address after: 315191 No. 1166 Mingguang North Road, Jiangshan Town, Ningbo, Zhejiang, Yinzhou District Patentee after: NINGBO AUX ELECTRIC Co.,Ltd. Patentee after: AUX AIR CONDITIONING LIMITED BY SHARE Ltd. Address before: 315000 No.1166 Mingguang North Road, Jiangshan Town, Yinzhou District, Ningbo City, Zhejiang Province Patentee before: NINGBO AUX ELECTRIC Co.,Ltd. Patentee before: Ningbo Oxfam intelligent commercial air conditioning manufacturing Co.,Ltd. |
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