CN107014035B - Defrosting control method and device of air conditioner - Google Patents
Defrosting control method and device of air conditioner Download PDFInfo
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- CN107014035B CN107014035B CN201710198314.0A CN201710198314A CN107014035B CN 107014035 B CN107014035 B CN 107014035B CN 201710198314 A CN201710198314 A CN 201710198314A CN 107014035 B CN107014035 B CN 107014035B
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- 238000010257 thawing Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000003570 air Substances 0.000 description 99
- 238000010438 heat treatment Methods 0.000 description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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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
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/30—Velocity
- F24F2110/32—Velocity of the outside air
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a defrosting control method of an air conditioner, which comprises the following steps of: and when the outdoor environment temperature is less than or equal to the outdoor environment temperature threshold, the condenser temperature is less than or equal to the condenser temperature threshold, and the difference value between the fan drive control parameter value and the fan drive control parameter reference value is greater than the difference value set value, controlling the air conditioner to enter a defrosting mode. The invention can accurately judge whether the air conditioner is frosted in time and control the air conditioner to enter the defrosting mode when the air conditioner is frosted, thereby solving the problem of incomplete defrosting or false defrosting.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a defrosting control method and device of an air conditioner.
Background
When the air conditioning unit is in a heating mode, the general outdoor temperature is below ten degrees, the outdoor temperature is low, the outdoor unit also needs to absorb heat, the temperature of the evaporator body can be reduced to be below 0 degree, water vapor in ambient air can be condensed into frost on the surface of the evaporator, the frost layer on the surface of the heat exchanger becomes thicker and thicker along with the prolonging of time, the frost directly increases the heat transfer resistance between the surface of the heat exchanger and flowing air, so that the air flow passing through the heat exchanger is reduced, the heat exchange efficiency is reduced, the heat exchange quantity of a system is reduced, and the heating effect of the indoor unit is seriously attenuated.
At present, two defrosting methods are generally adopted for defrosting of an air conditioner, firstly, when the temperature and the time of a defrosting sensor of an outdoor unit reach set standards, the air conditioner enters a defrosting mode; and secondly, when the air conditioner is in a heating mode, when the detected ambient temperature and the accumulated running time of the unit reach set standards, the air conditioner external unit forcibly enters a defrosting working condition. The two defrosting determination methods cannot accurately determine whether the outdoor unit frosts, so that the outdoor unit cannot enter a defrosting mode in time when frosting occurs, the problem of incomplete defrosting can be caused, and the air conditioner can be controlled to enter the defrosting mode when the outdoor unit does not frost but meets the defrosting determination requirement, so that the problem of false defrosting can be caused. Therefore, the defrosting judgment method in the prior art can cause the problem of incomplete defrosting or false defrosting, and the heating effect of the air conditioner is influenced.
Disclosure of Invention
The embodiment of the invention provides a defrosting control method and device of an air conditioner, and aims to solve the problem of incomplete defrosting or false defrosting. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of the embodiments of the present invention, when the air conditioner is in heating operation, an outdoor environment temperature is obtained, when the outdoor environment temperature is less than or equal to an outdoor environment temperature threshold, a condenser temperature is obtained, when the condenser temperature is less than or equal to the condenser temperature threshold, a fan driving control parameter value is obtained, and when a difference between the fan driving control parameter value and a fan driving control parameter reference value is greater than a difference set value, the air conditioner is controlled to enter a defrosting mode. The fan driving control parameter value represents the load borne by the motor when the driving fan reaches the specified rotating speed, and is comprehensively determined by factors such as power supply voltage, power supply current, fan torque, environment and the like, the driving fan reaches the same rotating speed, and the larger the load borne by the motor is, the larger the fan driving control parameter value is.
According to a second aspect of the embodiments of the present invention, there is provided a defrosting control device for an air conditioner, including an outdoor environment temperature sensor, a condenser temperature sensor, a fan driving control parameter sensor, and a processor, wherein the outdoor environment temperature sensor is configured to obtain an outdoor environment temperature; the condenser temperature sensor is used for acquiring the temperature of the condenser; the fan drive control parameter sensor is used for acquiring fan drive control parameter values; when the air conditioner is in heating operation, the processor is used for controlling the air conditioner to enter a defrosting mode when the outdoor environment temperature is less than or equal to the outdoor environment temperature threshold, the condenser temperature is less than or equal to the condenser temperature threshold, and the difference value between the fan drive control parameter value and the fan drive control parameter reference value is greater than the difference value set value.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
in the invention, when the air conditioner is in heating operation, whether the air conditioner enters a defrosting mode is judged according to the comparison result of the difference value of the fan drive control parameter value minus the fan drive control parameter reference value and the difference value set value. When the outdoor environment temperature is smaller than or equal to the outdoor environment temperature threshold value, the current environment temperature is lower, and the water vapor in the air is easy to condense into frost, when the condenser temperature is smaller than or equal to the condenser temperature threshold value, the condenser temperature is lower than the environment temperature, and the water vapor in the air is easy to condense into frost when encountering the condenser, when the difference value of the fan driving control parameter value and the fan driving control parameter reference value is larger than the difference value set value, the heating load of the air conditioner is larger than a larger load, the frost is generated outside the condenser, and the air conditioner is controlled to enter a defrosting mode. The invention can accurately judge whether the air conditioner is frosted in time and control the air conditioner to enter a defrosting mode when the air conditioner is frosted, thereby solving the problem of incomplete defrosting or false defrosting.
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
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a flow chart diagram illustrating a defrost control method for an air conditioner in accordance with an exemplary embodiment;
FIG. 2 is a flowchart illustrating a defrost control method of an air conditioner according to another exemplary embodiment;
FIG. 3 is a flowchart illustrating a method for determining a reference value of a fan driving control parameter in a defrosting control method of an air conditioner according to an exemplary embodiment;
FIG. 4 is a flowchart illustrating a method for determining a reference value of a fan driving control parameter in a defrosting control method of an air conditioner according to another exemplary embodiment;
fig. 5 is a flowchart illustrating a method for setting a difference setting value between a fan driving control parameter value and a fan driving control parameter reference value in a defrosting control method of an air conditioner according to an exemplary embodiment.
Fig. 6 is a schematic structural diagram illustrating a defrost control apparatus of an air conditioner according to an exemplary embodiment.
Description of reference numerals: 601. an outdoor ambient temperature sensor; 602. a condenser temperature sensor; 603. a processor; 604. a fan drive control parameter sensor; 605. a timer; 606. an air conditioner target temperature sensor.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the structures, products and the like disclosed by the embodiments, the description is relatively simple because the structures, the products and the like correspond to the parts disclosed by the embodiments, and the relevant parts can be just described by referring to the method part.
The embodiment of the invention discloses a defrosting control method of an air conditioner, which comprises the following steps of:
s101: the outdoor ambient temperature Tp1 is acquired.
S102: the condenser temperature Tp2 is acquired.
S103: and acquiring a fan driving control parameter value duty.
S104: and when the outdoor environment temperature Tp1 is less than or equal to the outdoor environment temperature threshold, the condenser temperature Tp2 is less than or equal to the condenser temperature threshold, and the difference value of the fan driving control parameter value duty and the fan driving control parameter reference value is greater than the difference value set value, controlling the air conditioner to enter a defrosting mode, wherein the condenser temperature threshold is less than the outdoor environment temperature threshold.
When the air conditioner is in heating operation, when the outdoor environment temperature Tp1 is less than or equal to the outdoor environment temperature threshold, the current environment temperature is low, and water vapor in the air is easy to condense into frost, when the temperature Tp2 of the condenser is less than or equal to the condenser temperature threshold, the condenser temperature is lower than the environment temperature and is lower than a lower temperature, and the water vapor in the air is easy to condense into frost when encountering the condenser, when the difference value of the fan driving control parameter value duty and the fan driving control parameter reference value is greater than the difference value set value, the air conditioner is driven to reach the specified rotating speed when in heating operation, the motor load is greater than a larger load, the air near the fan is not smooth in circulation, the condenser is frosted, and the air conditioner is controlled to enter a defrosting mode. The invention can accurately judge whether the air conditioner is frosted in time and control the air conditioner to enter a defrosting mode when the air conditioner is frosted, thereby solving the problem of incomplete defrosting or false defrosting.
In the above embodiment, as an alternative embodiment, the outdoor environment temperature threshold may be 3 ℃ to 30 ℃, which is not limited herein, and those skilled in the art can set the outdoor environment temperature threshold according to actual situations as long as it can meet the requirement of starting to test the condenser temperature Tp2 when Tp1 is less than or equal to the outdoor environment temperature threshold. For example, when the heating operation environment temperature of the air conditioner is higher, the indoor heat exchange requirement is lower, and the outdoor environment temperature threshold may be selected to have a higher value, for example, 15 ℃, 20 ℃, and the like, which is not limited herein, and conversely, when the heating operation environment temperature of the air conditioner is lower, the indoor heat exchange requirement is higher, and the outdoor environment temperature threshold may be selected to have a lower value, for example, 5 ℃, 8 ℃, and the like, and the specific numerical values do not constitute a limitation of the present invention. Alternatively, the condenser temperature threshold may be set to be between-1 ℃ and 15 ℃, which is not limited herein, as long as it can meet the requirement that the fan driving control parameter duty is tested when Tp2 is less than or equal to the condenser temperature threshold, for example, when the outdoor environment temperature of the air conditioner heating operation is high, the indoor heating requirement is low, the condenser temperature threshold may be set to be a high value, for example, 10 ℃, which is not limited herein, on the contrary, when the outdoor environment temperature of the air conditioner heating operation is low, the indoor heating requirement is high, the condenser temperature threshold may be set to be a low value, for example, 0 ℃, 1 ℃, and the specific numerical value does not limit the present invention. Optionally, the reference value of the fan driving control parameter may be 100 to 1000, etc., and is not limited herein, for example, when the temperature of the outdoor environment of the heating operation of the air conditioner is higher, the indoor heating requirement is lower, the heat exchange requirement of the condenser is lower, the outer part of the condenser is not easy to frost, the heat exchange requirement of the condenser can be met when the fan driving control parameter value is lower, the fan driving control parameter reference value can be a lower value, such as 200, 300 and the like, on the contrary, when the outdoor environment temperature of the air conditioner heating operation is low, the indoor heating requirement is high, the heat exchange requirement of the condenser is high, the outside of the condenser is easy to frost, the heat exchange requirement of the condenser can be met only when the fan driving control parameter value is high, the fan driving control parameter reference value can be a high value, such as 800, 900 and the like, and the specific numerical value does not limit the invention. Optionally, the difference between the fan driving control parameter value and the fan driving control parameter reference value may be set to 0 to 1000, for example, when the target temperature setting value of the air conditioner is high, in order to improve the heating efficiency and prevent the air conditioner from frequently entering the defrosting mode, the setting of the difference between the fan drive control parameter value and the fan drive control parameter reference value may be set to a higher value, such as 300,500, without limitation, when the target temperature setting value of the air conditioner is low, the service life of the air conditioner can be considered, defrosting can be carried out in time, the difference setting value of the fan drive control parameter value minus the fan drive control parameter reference value may be set to a lower value, for example, 20, 50, etc., the specific value setting is not intended to limit the present invention, and may be set by those skilled in the art according to actual circumstances.
Optionally, as shown in fig. 2, after S202, the method further includes:
s201: the duration t for which the condenser temperature Tp2 is less than or equal to the condenser temperature threshold is obtained.
S203: and when the outdoor environment temperature Tp1 is less than or equal to the outdoor environment temperature threshold, the condenser temperature Tp2 is less than or equal to the condenser temperature threshold, the duration t is greater than or equal to the time set value, and the difference value of the fan driving control parameter value duty minus the fan driving control parameter reference value is greater than the difference set value, controlling the air conditioner to enter a defrosting mode, wherein the condenser temperature threshold is less than the outdoor environment temperature threshold.
In this embodiment, when the air conditioner is in heating operation, the outdoor environment temperature Tp1 is less than or equal to the outdoor environment temperature threshold, the condenser temperature Tp2 is less than or equal to the condenser temperature threshold, and the duration time t is greater than or equal to the time setting value, which indicates that the condenser is suitable for frosting for a long time, and when the difference between the fan drive control parameter duty and the fan drive control parameter reference value is greater than the difference setting value, which indicates that the heating load of the air conditioner is greater than a large load, the frosting phenomenon occurs in the condenser, and the air conditioner is controlled to enter the defrosting mode. The embodiment can detect the outdoor environment temperature Tp1, the condenser temperature Tp2, the duration time t and the fan drive control parameter value duty after the air conditioner is in heating operation, and can accurately judge whether the outdoor unit frosts and timely enter a defrosting mode. The time setting value may be 10 to 60 minutes, which is not limited herein, for example, when the outdoor environment temperature is high, the outdoor unit of the air conditioner is hard to frost, so that the duration of the condenser temperature Tp2 being less than or equal to the condenser temperature threshold value may be set to be longer time, such as 40 minutes, 50 minutes, etc., when the outdoor environment temperature is low, the outdoor unit of the air conditioner is easier to frost, so that the duration of the condenser temperature Tp2 being less than or equal to the condenser temperature threshold value may be set to be shorter time, such as 10 minutes, 15 minutes, etc., when the air conditioner is heating, and the specific value setting does not constitute a limitation to the present invention, and a person skilled in the art may set the time setting value according to actual situations.
In any of the above embodiments, as shown in fig. 3, the method further includes:
s301: and acquiring an initial value of a fan drive control parameter.
S302: and determining a fan drive control parameter reference value according to the fan drive control parameter initial value.
The installation positions of each air conditioner are different, the load environments of motors in the air conditioners are different, so that the driving motors reach the same rotating speed, the required fan driving control parameter values duty are different, and a fan driving control parameter reference value needs to be obtained before the fan driving control parameter value variation is used for judging whether the air conditioner enters a defrosting mode or not.
Optionally, in this embodiment, in an initial stage of heating operation of the air conditioner, under a condition that the air speed is high, an initial value of the fan drive control parameter is obtained, and a reference value of the fan drive control parameter is determined according to the initial value of the fan drive control parameter.
Optionally, in the foregoing embodiments, there are various implementations for determining the reference value of the fan drive control parameter, and as an optional implementation, the fan drive control parameter value after the air conditioner is heated and operated for a certain time is obtained, and the reference value of the fan drive control parameter is determined according to the fan drive control parameter value after the air conditioner is heated and operated for a certain time.
In the above embodiment, optionally, as shown in fig. 4, the method further includes:
s401: acquiring initial values of at least two fan drive control parameters;
s402: determining the average value of the initial values of the at least two fan drive control parameters, and taking the average value as a reference value of the fan drive control parameters;
s403: and when the difference value of the fan drive control parameter value and the fan drive control parameter reference value is larger than the difference value set value, controlling the air conditioner to enter a defrosting mode.
In this embodiment, the number of the acquired fan drive control parameter values may be 10 to 60, which is not limited herein, when the fan drive control parameter values are relatively stable, a smaller number of fan drive control parameter values may be acquired, for example, 10, 15, and the like, which is not limited herein, when the fan drive control parameter values have relatively large fluctuation, a larger number of fan drive control parameter values may be acquired, for example, 50, 60, and the like, and the specific number setting does not constitute a limitation of the present invention, and a person skilled in the art may set the values according to actual situations.
Optionally, in this embodiment, at the initial stage of heating operation of the air conditioner, under the condition of a high wind speed, at least two initial values of the fan drive control parameter are obtained, an average value of the at least two initial values of the fan drive control parameter obtained by calculation is used as a reference value of the fan drive control parameter, and when a difference value between the fan drive control parameter value and the reference value of the fan drive control parameter is greater than a difference value set value, the air conditioner is controlled to enter the defrosting mode.
Optionally, in the above embodiments, there are various implementations of obtaining at least two initial values of the fan drive control parameter, as an optional implementation, at least two initial values of the fan drive control parameter are selected at regular intervals, an average value of the at least two initial values of the fan drive control parameter obtained by calculation is used as a reference value of the fan drive control parameter, and when a difference value between the fan drive control parameter value and the reference value of the fan drive control parameter is greater than a difference value set value, the air conditioner is controlled to enter a defrosting mode.
Optionally, in the above embodiment, there are various implementations of calculating the initial values of the at least two fan drive control parameters, as an optional implementation, the mode of the at least two fan drive control parameter values obtained by calculation is used as a fan drive control parameter reference value, and when the difference between the fan drive control parameter value and the fan drive control parameter reference value is greater than the difference set value, the air conditioner is controlled to enter the defrosting mode.
In the above embodiment, optionally, as shown in fig. 5, the method further includes:
s501: acquiring a target temperature set value of the air conditioner;
s502: and determining a difference value set value of the fan drive control parameter value and the fan drive control parameter reference value according to the difference value of the target temperature set value of the air conditioner minus the outdoor environment temperature.
When the air conditioner is in heating operation, the difference value between the target temperature setting value of the air conditioner and the outdoor environment temperature is different, the load of a motor in the air conditioner is also different, when the difference value between the target temperature setting value of the air conditioner and the outdoor environment temperature is larger, the indoor heating requirement is higher, in order to prevent the air conditioner from frequently entering a defrosting mode and influencing the indoor heating effect, the difference value setting value between the fan driving control parameter value and the fan driving control parameter reference value can be set to be a higher value, when the difference value between the target temperature setting value of the air conditioner and the outdoor environment temperature is smaller, the indoor heating requirement is lower, the service life of the air conditioner can be considered, defrosting is timely, and at the moment, the difference value setting value between the fan driving control parameter value and the fan driving control parameter reference value can be set to.
Optionally, in the foregoing embodiments, there are various implementations of determining the difference setting value of the fan drive control parameter value and the fan drive control parameter reference value, as an optional implementation, the difference setting value of the fan drive control parameter value and the fan drive control parameter reference value may be determined according to an outdoor unit air duct air speed, when the outdoor unit air duct air speed is high, it indicates that an indoor heating requirement is large, to improve heating efficiency, and prevent the air conditioner from frequently entering a defrosting mode, the difference setting value may be set to a high value, and when the outdoor unit air duct air speed is low, it indicates that the indoor heating requirement is low, and may take into account a service life of the air conditioner, and defrost in time, and the difference setting value may be set to a low value.
A third embodiment of the present invention discloses a defrosting control device for an air conditioner, as shown in fig. 6, including: an outdoor environment temperature sensor 601, a condenser temperature sensor 602, a processor 603, a fan drive control parameter sensor 604, a timer 605, and an air conditioner target temperature sensor 606; the outdoor environment temperature sensor 601 is used for acquiring an outdoor environment temperature Tp 1; the condenser temperature sensor 602 is used to acquire a condenser temperature Tp 2; the fan drive control parameter sensor 604 is configured to obtain a fan drive control parameter value duty; the processor 603 is configured to control the air conditioner to enter the defrost mode when the outdoor ambient temperature Tp1 is less than or equal to the outdoor ambient temperature threshold, the condenser temperature Tp2 is less than or equal to the condenser temperature threshold, and the difference between the fan drive control parameter duty and the fan drive control parameter reference value is greater than the difference set value.
Optionally, in the above embodiment, the timer 605 is configured to obtain the duration t when the condenser temperature Tp2 is less than or equal to the condenser temperature threshold, and the processor 603 is further configured to control the air conditioner to enter the defrosting mode when the outdoor environment temperature Tp1 is less than or equal to the outdoor environment temperature threshold, the condenser temperature Tp2 is less than or equal to the condenser temperature threshold, the duration t is greater than or equal to the time setting value, and the difference between the fan driving control parameter duty and the fan driving control parameter reference value is greater than the difference setting value.
Optionally, in the above embodiment, the fan drive control parameter sensor 604 is further configured to obtain an initial value of the fan drive control parameter, and the processor 603 is further configured to determine a reference value of the fan drive control parameter according to the initial value of the fan drive control parameter.
Optionally, in the above embodiment, the fan drive control parameter sensor 604 is further configured to obtain at least two initial values of the fan drive control parameter, and the processor 603 is further configured to determine a reference value of the fan drive control parameter according to the at least two initial values of the fan drive control parameter;
optionally, in the foregoing embodiment, the fan drive control parameter sensor 604 is further configured to obtain at least two initial values of the fan drive control parameter, and the processor 603 is further configured to determine a mean value of the at least two initial values of the fan drive control parameter, and use the mean value of the at least two initial values of the fan drive control parameter as the reference value of the fan drive control parameter.
Optionally, in the above embodiment, the air conditioner target temperature sensor 606 is configured to obtain an air conditioner target temperature setting value, and the processor 603 is further configured to determine a difference setting value of the fan drive control parameter value and the fan drive control parameter reference value according to a difference between the air conditioner target temperature setting value and the outdoor environment temperature.
Optionally, in the above embodiment, the processor 603 is further configured to control the air conditioner to enter the defrosting mode when the difference between the fan drive control parameter value and the fan drive control parameter reference value is greater than the difference set value.
It is to be understood that the specific numerical settings in the present invention are not intended to limit the present invention, and the present invention is not limited to the flows and structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (8)
1. A defrost control method for an air conditioner, the method comprising:
acquiring the outdoor environment temperature;
acquiring the temperature of a condenser;
acquiring a fan drive control parameter value;
when the outdoor environment temperature is less than or equal to an outdoor environment temperature threshold, the condenser temperature is less than or equal to a condenser temperature threshold, and the difference value between the fan drive control parameter value and the fan drive control parameter reference value is greater than a difference value set value, controlling the air conditioner to enter a defrosting mode, wherein the condenser temperature threshold is less than the outdoor environment temperature threshold;
wherein the method further comprises:
acquiring a target temperature set value of the air conditioner;
determining the difference value set value according to the difference value of the target temperature set value of the air conditioner minus the outdoor environment temperature; alternatively, the method further comprises:
and determining the set value of the difference value according to the air speed of the air duct of the outdoor unit.
2. The method of claim 1, wherein the method further comprises:
obtaining a duration for which the condenser temperature is less than or equal to the condenser temperature threshold;
the condenser temperature being less than or equal to the condenser temperature threshold comprises:
the condenser temperature is less than or equal to the condenser temperature threshold, and the duration of the condenser temperature being less than or equal to the condenser temperature threshold is greater than or equal to a time set value.
3. The method of claim 1 or 2, wherein the method further comprises:
acquiring an initial value of a fan drive control parameter;
and determining the reference value of the fan drive control parameter according to the initial value of the fan drive control parameter.
4. The method of claim 3, wherein the method further comprises:
acquiring at least two initial values of the fan driving control parameters;
determining a reference value of the fan drive control parameter according to at least two initial values of the fan drive control parameter;
and taking the average value of the initial values of the at least two fan driving control parameters as the reference value of the fan driving control parameters.
5. A defrosting control apparatus of an air conditioner, characterized in that the apparatus comprises: the system comprises an outdoor environment temperature sensor, a condenser temperature sensor, a fan drive control parameter sensor and a processor;
the outdoor environment temperature sensor is used for acquiring outdoor environment temperature;
the condenser temperature sensor is used for acquiring the temperature of the condenser;
the fan drive control parameter sensor is used for acquiring fan drive control parameter values;
the processor is configured to control the air conditioner to enter a defrosting mode when the outdoor environment temperature acquired by the outdoor environment temperature sensor is less than or equal to an outdoor environment temperature threshold, the condenser temperature acquired by the condenser temperature sensor is less than or equal to a condenser temperature threshold, and a difference between the fan drive control parameter value and a fan drive control parameter reference value acquired by the fan drive control parameter sensor is greater than a difference set value;
wherein the apparatus further comprises: an air conditioner target temperature sensor;
the air conditioner target temperature sensor is used for acquiring a set value of the air conditioner target temperature;
determining a difference value set value obtained by subtracting the fan drive control parameter reference value obtained by the fan drive control parameter sensor and the processor together from the fan drive control parameter value obtained by the fan drive control parameter sensor according to the air conditioner target temperature set value obtained by the air conditioner target temperature sensor; or,
alternatively, the apparatus further comprises:
and the processor is used for determining the set value of the difference value according to the air speed of the air duct of the outdoor unit.
6. The apparatus of claim 5, wherein the apparatus further comprises:
a timer for obtaining a duration of time that the condenser temperature is less than or equal to the condenser temperature threshold;
the processor is further used for acquiring the outdoor environment temperature sensor, the outdoor environment temperature is smaller than or equal to the outdoor environment temperature threshold, the condenser temperature sensor acquires the condenser temperature is smaller than or equal to the condenser temperature threshold, the timer acquires the condenser temperature is smaller than or equal to the duration of the condenser temperature threshold is larger than or equal to the time set value, the fan drive control parameter sensor acquires the fan drive control parameter value minus the difference of the fan drive control parameter reference value is larger than when the difference set value is larger, the air conditioner is controlled to enter the defrosting mode.
7. The apparatus of claim 5 or 6,
the fan drive control parameter sensor is also used for acquiring an initial value of a fan drive control parameter;
the processor is further configured to determine a reference value of the fan drive control parameter according to the initial value of the fan drive control parameter obtained by the fan drive control parameter sensor.
8. The apparatus of claim 7,
the fan drive control parameter sensor is also used for acquiring at least two fan drive control parameter initial values;
the processor is further configured to determine a reference value of the fan drive control parameter according to at least two initial values of the fan drive control parameter obtained by the fan drive control parameter sensor;
the processor is further configured to use an average value of at least two initial values of the fan drive control parameter, which are obtained by the fan drive control parameter sensor, as a reference value of the fan drive control parameter.
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| CN107917504B (en) * | 2017-10-11 | 2019-10-01 | 青岛海尔空调器有限总公司 | Air-conditioning and its defrosting control method |
| CN110631205A (en) * | 2018-06-25 | 2019-12-31 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
| CN109631234B (en) * | 2018-11-15 | 2021-06-22 | 青岛海尔空调电子有限公司 | Heating and defrosting control method and system for outdoor unit of air conditioner |
| CN109780684B (en) * | 2019-01-24 | 2022-06-24 | 青岛海尔空调电子有限公司 | Air conditioner control method and device, air conditioner and storage medium |
| CN111043713A (en) * | 2019-12-31 | 2020-04-21 | Tcl空调器(中山)有限公司 | Defrosting method of air conditioner, air conditioner and storage medium |
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| JP3609286B2 (en) * | 1999-05-25 | 2005-01-12 | シャープ株式会社 | Air conditioning equipment |
| KR20110100098A (en) * | 2010-03-03 | 2011-09-09 | 엘지전자 주식회사 | Apparatus for controllign an air cooling type chiller and method the same |
| CN102901182B (en) * | 2012-10-16 | 2015-06-03 | 青岛海尔空调电子有限公司 | Defrosting method for air conditioner |
| CN105157290B (en) * | 2014-05-26 | 2017-10-13 | 广东美的制冷设备有限公司 | Air conditioner and its defrosting control method |
| CN105650801B (en) * | 2014-12-08 | 2019-04-16 | Tcl空调器(中山)有限公司 | Control air-conditioning enters the method, apparatus and air conditioner of defrosting mode |
| CN104930674B (en) * | 2015-05-14 | 2017-11-17 | 珠海格力电器股份有限公司 | Defrosting control method and device for outdoor unit of air conditioning unit and air conditioning system |
| CN105588267B (en) * | 2015-05-29 | 2018-07-24 | 青岛海信日立空调系统有限公司 | A kind of defrosting control method and device that heat pump system frosting degree detects automatically |
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