CN113074439B - Defrosting control method and device and air conditioner - Google Patents
Defrosting control method and device and air conditioner Download PDFInfo
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- CN113074439B CN113074439B CN202110369194.2A CN202110369194A CN113074439B CN 113074439 B CN113074439 B CN 113074439B CN 202110369194 A CN202110369194 A CN 202110369194A CN 113074439 B CN113074439 B CN 113074439B
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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
Abstract
The invention discloses a defrosting control method and device and an air conditioner. Wherein, the method comprises the following steps: when the air conditioner operates in a heating mode, acquiring outdoor environment data; determining a target value of the corresponding air conditioner operation capacity attenuation condition according to the outdoor environment data; and when the actual value of the attenuation situation of the running capacity of the air conditioner reaches the target value, controlling the air conditioner to be switched to a defrosting mode. According to the invention, the influence of environmental factors on the defrosting execution effect is considered, the optimal defrosting execution time adaptive to the outdoor environment is determined by combining the air conditioner use environment, the optimal defrosting control is realized, the ineffective defrosting is avoided, the air conditioner operates without frost feeling, and the problem of poor defrosting effect when the air conditioner is in a severe use environment in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of defrosting, in particular to a defrosting control method and device and an air conditioner.
Background
When the air conditioner operates in heating mode, because the outdoor environment temperature is low, the surface of the outdoor heat exchanger is easy to frost, and the frost layer can affect the heat exchange efficiency of the outdoor heat exchanger, and further affect the heating or refrigerating capacity of the air conditioner, the air conditioner needs to be defrosted. Defrosting corresponds to a cooling mode, and can cause the indoor temperature to be reduced, thereby influencing the comfort of users.
The defrosting process is a process of energy attenuation (i.e., heating amount reduction), because the reverse cycle defrosting corresponds to a refrigeration mode, the reduction of the heat exchange temperature difference at the indoor side leads to the reduction of the heat exchange capacity, and then the heating amount is reduced. If the air conditioner is in a bad operating environment, frost water is quickly condensed even if frost is removed, or the environment humidity is too high, a new frost layer is generated while the frost layer is melted, and the defrosting effect is poor.
For defrosting of the air conditioner, a method is that a fan load is controlled by a four-way valve in a joint mode, a compressor is controlled by a high-frequency reversing short-time defrosting mode in early and middle frosting stages, a control method of infinite small-period defrosting operation or small-period defrosting and large-period defrosting combined operation is adopted, and the continuous defrosting time of a small-period defrosting mode is shorter than that of a large-period defrosting mode. When a certain condition is met in the heating operation process, the heating mode is switched to the corresponding defrosting mode (a small-period defrosting mode or a large-period defrosting mode) and the heating mode and the small-period defrosting mode are switched for multiple times, so that defrosting can be realized, the fluctuation of the indoor temperature can be avoided, and the user experience is improved.
Although the reverse cycle defrosting time of the small-cycle defrosting is very short, the reverse cycle defrosting time is still a process of energy attenuation (namely, heating quantity reduction). If the air conditioner is in a bad operating environment, frost is removed in a short period, but frost water is condensed quickly, or the environmental humidity is too high, and a new frost layer is generated while the frost layer is melted, the advantage of the short-period defrosting control is lost in the using environment.
Disclosure of Invention
The embodiment of the invention provides a defrosting control method and device and an air conditioner, and at least solves the problem that in the prior art, the defrosting effect is poor when the air conditioner is in a severe using environment.
In order to solve the technical problem, an embodiment of the present invention provides a defrosting control method, including: when the air conditioner operates in a heating mode, acquiring outdoor environment data; determining a target value of the corresponding air conditioner operation capacity attenuation condition according to the outdoor environment data; and when the actual value of the attenuation situation of the running capacity of the air conditioner reaches the target value, controlling the air conditioner to be switched to a defrosting mode.
Optionally, the outdoor environment data includes: outdoor relative humidity and outdoor temperature; determining a target value of the corresponding air conditioner operation capacity attenuation condition according to the outdoor environment data, wherein the target value comprises the following steps: determining a humidity range corresponding to the outdoor relative humidity, and determining a temperature range in which the outdoor temperature is located; and determining the target value of the corresponding air conditioner operation capacity attenuation condition according to a preset humidity range, a corresponding relation between a temperature range and the target value of the air conditioner operation capacity attenuation condition, the humidity range corresponding to the outdoor relative humidity and the temperature range where the outdoor temperature is located.
Optionally, determining a humidity range corresponding to the outdoor relative humidity includes at least one of: determining a humidity range corresponding to the outdoor relative humidity according to the actual value of the air conditioner operation capacity attenuation condition; acquiring a first humidity value by using a humidity sensor, and determining a humidity range in which the first humidity value is located according to a preset humidity threshold value to serve as a humidity range corresponding to the outdoor relative humidity; and acquiring a second humidity value through weather information, and determining a humidity range where the second humidity value is located according to a preset humidity threshold value to serve as the humidity range corresponding to the outdoor relative humidity.
Optionally, determining a humidity range corresponding to the outdoor relative humidity according to the actual value of the air conditioner operation capacity attenuation condition includes: acquiring an actual value of the air conditioner operation capacity attenuation condition; acquiring the current operation load of the air conditioner; and determining an environment humidity range corresponding to the actual value of the air conditioner operation capacity attenuation condition according to the preset corresponding relation between the air conditioner operation capacity attenuation condition under the current operation load and the environment humidity range, and taking the environment humidity range as the humidity range corresponding to the outdoor relative humidity.
Optionally, obtaining an actual value of the air conditioner operation capacity attenuation condition includes: controlling the air conditioner to enter a heating mode to run for a preset time, and starting capacity attenuation calculation; recording the maximum operation capacity value appearing in the operation process of the air conditioner; determining an actual value of the air conditioner operation capacity attenuation condition according to a preset period from the moment when the maximum operation capacity value appears; wherein the air conditioner operation capacity attenuation condition comprises: and the air conditioner operation capacity attenuation rate or the air conditioner operation capacity attenuation amplitude in the preset period.
Optionally, obtaining an actual value of the air conditioner operation capacity attenuation condition includes: controlling the air conditioner to enter a heating mode to run for a preset time, and starting capacity attenuation calculation; recording the maximum exhaust pressure value occurring in the air conditioner operation process; determining an actual value of the exhaust pressure attenuation situation according to a preset period from the moment when the maximum exhaust pressure value appears, and taking the actual value of the exhaust pressure attenuation situation as the actual value of the air conditioner operation capacity attenuation situation; wherein the exhaust pressure decay scenario comprises: and the exhaust pressure decay rate or the exhaust pressure decay amplitude in the preset period.
An embodiment of the present invention further provides a defrosting control device, including: the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring outdoor environment data when the air conditioner operates in a heating mode; the determining module is used for determining a target value of the corresponding air conditioner operation capacity attenuation condition according to the outdoor environment data; and the control module is used for controlling the air conditioner to be switched to a defrosting mode when the actual value of the air conditioner running capacity attenuation situation reaches the target value.
An embodiment of the present invention further provides an air conditioner, including: the embodiment of the invention provides a defrosting control device.
Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, where the program, when executed by a processor, implements a defrosting control method according to an embodiment of the present invention.
An embodiment of the present invention further provides an electronic device, including: one or more processors; a memory for storing one or more programs that, when executed by the one or more processors, cause the one or more processors to implement a defrosting control method according to an embodiment of the present invention.
By applying the technical scheme of the invention, when the air conditioner operates in the heating mode, outdoor environment data is obtained, the target value of the corresponding air conditioner operation capacity attenuation condition is determined according to the outdoor environment data, and when the actual value of the air conditioner operation capacity attenuation condition reaches the target value, the air conditioner is controlled to be switched to the defrosting mode. The influence of environmental factors on defrosting execution effect is considered, the optimal defrosting execution time adaptive to the outdoor environment is determined by combining the use environment of the air conditioner, the optimal defrosting control is realized, the ineffective defrosting is avoided, the frostless operation of the air conditioner is realized, and the problem of poor defrosting effect when the air conditioner is in a severe use environment in the prior art is solved.
Drawings
FIG. 1 is a flow chart of a defrosting control method provided by an embodiment of the invention;
FIG. 2 is a flowchart illustrating an exemplary embodiment of a defrosting control method according to the present invention;
fig. 3 is a block diagram of a defrosting control apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of this invention and the accompanying drawings are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
Aiming at the problem that the defrosting effect of an air conditioner in a severe using environment is poor in the prior art, the embodiment of the invention provides a defrosting control method, which considers the influence of environmental factors on the defrosting execution effect, realizes the optimal control on defrosting by combining the using environment of the air conditioner and realizes the frostless operation of the air conditioner.
Fig. 1 is a flowchart of a defrosting control method according to an embodiment of the present invention, and as shown in fig. 1, the method includes the following steps:
and S101, when the air conditioner operates in a heating mode, acquiring outdoor environment data.
And S102, determining a target value of the corresponding air conditioner operation capacity attenuation situation according to the outdoor environment data.
And S103, controlling the air conditioner to be switched to a defrosting mode when the actual value of the air conditioner running capacity attenuation situation reaches the target value.
The operation capacity of the air conditioner is heating capacity in the heating mode and cooling capacity in the cooling mode. The air conditioner operation capacity shows a trend of increasing firstly and then gradually decreasing along with the gradual increase of frost on the surface of the heat exchanger. When the actual value of the attenuation condition of the operation capacity of the air conditioner meets the execution condition, namely the actual value of the attenuation condition of the operation capacity of the current air conditioner reaches the target value of the attenuation condition of the operation capacity of the air conditioner corresponding to the current outdoor environment data, or the actual value of the attenuation condition of the operation capacity of the current air conditioner is greater than or equal to the target value of the attenuation condition of the operation capacity of the air conditioner corresponding to the current outdoor environment data, the air conditioner enters a defrosting mode at the moment; and when the actual value of the attenuation condition of the operation capacity of the air conditioner does not meet the execution condition, namely the actual value of the attenuation condition of the operation capacity of the current air conditioner is smaller than the target value of the attenuation condition of the operation capacity of the air conditioner corresponding to the current outdoor environment data, continuously controlling the operation of the air conditioner according to the conventional control logic.
In a case where the outdoor environment may cause ineffective defrosting (for example, the outdoor temperature is low, or the outdoor temperature is low and the outdoor relative humidity is high), the defrosting mode may not be executed, specifically, if the target value of the air conditioner operation capacity degradation condition corresponding to the current outdoor environment data is a preset value, the defrosting mode is not executed. The preset value is set according to the outdoor environment condition which can lead to the invalidation of defrosting, and the preset value can be specifically set to a large numerical value which cannot be reached by the attenuation condition of the air conditioner operation capacity, so that the actual value of the attenuation condition of the air conditioner operation capacity cannot reach the preset value, and the air conditioner cannot be switched to a defrosting mode under the outdoor environment which can lead to the invalidation of defrosting, and the invalid defrosting is avoided. In this particular case, other defrosting modes may be used.
The defrosting mode in the embodiment of the invention can be a common defrosting mode, and can also be a small-period defrosting mode mentioned in the background art, and the continuous defrosting time of the small-period defrosting mode is less than or equal to a set time value. The setting time value can be set according to actual conditions, and for example, the value of the setting time value can be any value in the range of 30-50 seconds. And when the continuous defrosting time of the small-period defrosting mode reaches a set time value, exiting the small-period defrosting mode, continuing heating, and performing small-period defrosting again when the conditions are met, and repeating the steps to realize switching between the heating mode and the small-period defrosting mode for many times. In addition, under the condition that the continuous defrosting time of the small-period defrosting mode does not reach the set time value, if the air outlet temperature of the indoor unit is detected to be lower than the preset temperature, or the air conditioner running capacity is lower than the preset capacity, and the like, the small-period defrosting mode can also be quitted.
According to the defrosting control method, when the air conditioner operates in the heating mode, outdoor environment data are obtained, the target value of the corresponding air conditioner operation capacity attenuation situation is determined according to the outdoor environment data, and when the actual value of the air conditioner operation capacity attenuation situation reaches the target value, the air conditioner is controlled to be switched to the defrosting mode. The method has the advantages that the influence of environmental factors on defrosting execution effect is considered, the optimal defrosting execution time adaptive to the outdoor environment is determined by combining the using environment of the air conditioner, the optimal defrosting control is realized, the invalid defrosting is avoided, the frostless operation of the air conditioner is realized, and the problem of poor defrosting effect when the air conditioner is in a severe using environment in the prior art is solved.
The outdoor environment data includes: outdoor relative humidity and outdoor temperature. The outdoor temperature can be directly acquired by an ambient temperature sensor. The acquisition of the outdoor relative humidity will be described later.
Determining a target value of a corresponding air conditioner operation capacity attenuation situation according to the outdoor environment data, wherein the target value comprises the following steps: determining a humidity range corresponding to the outdoor relative humidity, and determining a temperature range in which the outdoor temperature is located; and determining the target value of the corresponding air conditioner operation capacity attenuation condition according to a preset humidity range, a corresponding relation between a temperature range and the target value of the air conditioner operation capacity attenuation condition, the humidity range corresponding to the outdoor relative humidity and the temperature range where the outdoor temperature is located.
The corresponding relation between different humidity ranges and temperature ranges and the target value of the air conditioner operation capacity attenuation condition can be preset through experiments, and then the corresponding target value of the air conditioner operation capacity attenuation condition is obtained through matching according to the current outdoor environment data when the air conditioner is actually controlled to operate.
According to the embodiment, the target value of the attenuation condition of the operation capacity of the air conditioner can be accurately determined according to the current outdoor environment data through the preset corresponding relation between different humidity ranges and temperature ranges and the target value of the attenuation condition of the operation capacity of the air conditioner, so that the optimal time for executing the defrosting mode is controlled based on the target value, and invalid defrosting is avoided.
Specifically, determining the humidity range corresponding to the outdoor relative humidity includes at least one of:
determining a humidity range corresponding to the outdoor relative humidity according to the actual value of the air conditioner operation capacity attenuation condition;
acquiring a first humidity value by using a humidity sensor, and determining a humidity range in which the first humidity value is located according to a preset humidity threshold value to serve as a humidity range corresponding to the outdoor relative humidity;
and acquiring a second humidity value through weather information, and determining a humidity range where the second humidity value is located according to a preset humidity threshold value to serve as the humidity range corresponding to the outdoor relative humidity.
The preset humidity threshold includes at least one threshold, different humidity levels (or called humidity ranges) can be divided by the preset humidity threshold, for example, the preset humidity threshold is 65% and 85%, the acquired actual humidity value is recorded as RH, if RH is less than or equal to 65%, the corresponding humidity range is a low humidity range, if RH is greater than 65% and less than or equal to 85%, the corresponding humidity range is a medium humidity range, and if RH is greater than 85%, the corresponding humidity range is a high humidity range.
The method and the device for determining the outdoor relative humidity provide three modes to determine the humidity range corresponding to the outdoor relative humidity, are flexible and reliable, and provide guarantee for determining the target value of the air conditioner operation capacity attenuation condition based on outdoor environment data. And if the humidity range corresponding to the outdoor relative humidity is determined according to the actual value of the air conditioner operation capacity attenuation condition, the humidity range corresponding to the outdoor relative humidity is determined directly through the operation parameters without increasing a humidity sensor, and the hardware cost input is not required to be increased.
As an optional implementation manner, determining the humidity range corresponding to the outdoor relative humidity according to the actual value of the air conditioner operation capacity attenuation condition includes: acquiring an actual value of the air conditioner operation capacity attenuation condition; acquiring the current operation load of the air conditioner; and determining an environment humidity range corresponding to the actual value of the air conditioner operation capacity attenuation condition according to a preset corresponding relation between the air conditioner operation capacity attenuation condition under the current operation load and the environment humidity range, and taking the environment humidity range as a humidity range corresponding to the outdoor relative humidity.
The corresponding relation between the air conditioner operation capacity attenuation condition of the air conditioner under various different operation loads and the environment humidity range can be preset through experiments, and then when the air conditioner is actually controlled to operate, the corresponding environment humidity range is obtained through matching according to the current operation load of the air conditioner and the actual value of the current air conditioner operation capacity attenuation condition and serves as the humidity range corresponding to the current outdoor relative humidity.
According to the embodiment, the preset corresponding relation between the air conditioner operation capacity attenuation condition of the air conditioner under various different operation loads and the environment humidity range can be used for accurately determining the humidity range corresponding to the current outdoor relative humidity according to the actual values of the current operation load of the air conditioner and the current air conditioner operation capacity attenuation condition, so that guarantee is provided for determining the target value of the subsequent air conditioner operation capacity attenuation condition.
The following describes a specific procedure for acquiring the actual value of the air conditioner operation capacity degradation condition.
(1) For the air conditioner with the operation capacity calculation function, the operation capacity value of the air conditioner can be directly obtained.
Specifically, obtaining an actual value of the attenuation condition of the air conditioner operation capacity includes: controlling the air conditioner to enter a heating mode to operate for a preset time, and then starting capacity attenuation calculation; recording the maximum operation capacity value in the operation process of the air conditioner; determining an actual value of the air conditioner operation capacity attenuation condition according to a preset period from the moment when the maximum operation capacity value appears; wherein the air conditioner operation capacity attenuation condition comprises: and the air conditioner operation capacity attenuation rate or the air conditioner operation capacity attenuation amplitude in the preset period.
The preset time is the time for ensuring that the air conditioner reaches a preliminary stable state, and the stable state is a state that the variation of the heating capacity of the air conditioner is not large. After the air conditioner starts heating operation, the heating capacity can be gradually increased along with the refrigerant circulation, and when the refrigerant circulation is stable and frosting is not much, the fluctuation of the heating capacity of the air conditioner is not large, which is called as a stable state. For example, the preset time may be 10 min.
After the air conditioner enters a heating mode and operates for a preset time, the air conditioner reaches a stable state, the capacity attenuation calculation process can be started at the moment, specifically, the actual value of the capacity attenuation condition of the air conditioner is counted every other preset period from the moment when the maximum operation capacity value appears, and the capacity attenuation condition of the air conditioner comprises the following steps: the air conditioner operation capacity attenuation rate or the air conditioner operation capacity attenuation amplitude in the preset period may be preset according to the air conditioner operation condition, for example, the preset period may take a value of 2 min. The air conditioner operation capacity attenuation rate in the preset period is a ratio of the air conditioner operation capacity attenuation amplitude in the preset period to the preset period. It should be noted that the attenuation amplitude of the air conditioner operation capacity in the preset period can also reflect the attenuation rate essentially, the attenuation amplitude in the fixed time is directly used, the operation is simple and easy, and the calculation is reduced.
The embodiment directly acquires the air conditioner operation capacity value for the air conditioner with the operation capacity calculation function to determine the actual value of the air conditioner operation capacity attenuation condition, and can simply and reliably acquire the current air conditioner operation capacity attenuation condition.
(2) For the air conditioner without the operation capacity calculation function, the actual value of the attenuation condition of the operation capacity of the air conditioner can be calculated by utilizing the exhaust pressure of the air conditioner compressor.
Because the outdoor heat exchanger frosts and poor outdoor heat exchange, the temperature of the refrigerant evaporated by the outdoor heat exchanger is reduced, the corresponding pressure is also reduced, and the exhaust pressure after the compressor does work is also reduced, so that the frosting can cause the attenuation of the exhaust pressure. The exhaust pressure and the air-conditioning operation capacity show similar variation trends, namely, the trend of increasing and then gradually decreasing is shown along with the gradual increase of frost on the surface of the outdoor heat exchanger, and therefore, the exhaust pressure attenuation condition can reflect the attenuation condition of the air-conditioning operation capacity.
Specifically, obtaining an actual value of the attenuation condition of the air conditioner operation capacity includes: controlling the air conditioner to enter a heating mode to run for a preset time, and starting capacity attenuation calculation; recording the maximum exhaust pressure value occurring in the air conditioner operation process; determining an actual value of the exhaust pressure attenuation situation according to a preset period from the moment when the maximum exhaust pressure value appears, and taking the actual value of the exhaust pressure attenuation situation as the actual value of the air conditioner operation capacity attenuation situation; wherein the exhaust pressure decay scenario comprises: the exhaust pressure decay rate or the exhaust pressure decay amplitude in the preset period.
The preset time is the time for ensuring that the air conditioner reaches a preliminary stable state, and the stable state is a state that the variation of the heating capacity of the air conditioner is not large. After the air conditioner starts heating operation, the heating capacity can be gradually increased along with the refrigerant circulation, and when the refrigerant circulation is stable and frosting is not much, the fluctuation of the heating capacity of the air conditioner is not large, which is called as a stable state. For example, the preset time may be 10 min.
After the air conditioner enters a heating mode and operates for a preset time, the air conditioner reaches a stable state, at the moment, a capacity attenuation calculation process can be started, specifically, an actual value of an air conditioner exhaust pressure attenuation situation is counted every other preset period from the moment when a maximum exhaust pressure value appears, and the actual value is used as the actual value of the air conditioner operation capacity attenuation situation, wherein the exhaust pressure attenuation situation comprises the following steps: the exhaust pressure decay rate or the exhaust pressure decay amplitude in the preset period may be preset according to the operation condition of the air conditioner, for example, the preset period may take a value of 2 min. The exhaust pressure decay rate in the preset period is a ratio of the exhaust pressure decay amplitude in the preset period to the preset period. It should be noted that the exhaust pressure attenuation amplitude in the preset period can also reflect the attenuation rate per se, the attenuation amplitude in the fixed time is directly used, the operation is simple and easy, and the calculation is reduced.
In the embodiment, for the air conditioner without the operation capacity calculation function, the actual value of the air conditioner operation capacity attenuation situation is calculated by utilizing the exhaust pressure of the air conditioner compressor, and the current air conditioner operation capacity attenuation situation can be simply and reliably obtained.
The two modes provide the implementation mode that the current environment humidity under the condition of certain operation load requirement is determined according to the air conditioner operation capacity attenuation condition or the exhaust pressure attenuation condition, and the requirements of different air conditioners can be met.
The above-mentioned defrosting control method is described below with reference to a specific embodiment, however, it should be noted that the specific embodiment is only for better describing the present application and is not to be construed as a limitation to the present application. The same or corresponding terms as those of the above-described embodiments are explained, and the description of the present embodiment is omitted.
As shown in fig. 2, taking a small-cycle defrosting as an example, the defrosting control flow includes the following steps:
s201, starting heating operation by the air conditioner.
S202, judging the outdoor relative humidity and detecting the outdoor temperature.
S203, determining a target value of the air conditioner operation capacity attenuation situation according to the outdoor relative humidity and the outdoor temperature, and judging whether the actual value of the air conditioner operation capacity attenuation situation reaches the target value, namely judging whether an execution condition of small-period defrosting is met, if so, entering S204, and if not, entering S205.
And S204, executing small-period defrosting control.
And S205, performing normal control operation.
In the early stage of frosting, the frost on the surface of the outdoor heat exchanger increases the heat exchange area, so the operation capacity of the air conditioner is increased firstly, but the operation capacity of the air conditioner is gradually reduced along with the gradual increase of the frost, and the more the frost is, the faster the operation capacity of the air conditioner is reduced, so if the air conditioner can be controlled to defrost under the condition that the influence of the frost on the operation capacity of the air conditioner is small, a frost layer can be removed in a short time, and the small-period defrosting mode is a mode for defrosting in a short time under the condition that the influence of the frost on the operation capacity of the air conditioner is small.
After the air conditioner starts, the control system of the air conditioner confirms the current outdoor environment data, including: outdoor temperature and outdoor relative humidity. The outdoor temperature can be acquired by an ambient temperature sensor of the air conditioner and is recorded as T. It should be noted that, in the embodiment of the present invention, when determining the target value of the attenuation condition of the air conditioner operation capacity, the outdoor relative humidity used may be a humidity range, and a specific humidity value is not required to be used.
The outdoor relative humidity can be obtained through the following two ways:
(1) and for the air conditioner with the operation capacity calculation function, under a certain operation load requirement condition, determining the current outdoor relative humidity according to the actual value of the current air conditioner operation capacity attenuation condition.
The specific implementation method comprises the following steps: after the air conditioner heating start operation is performed for t time, the air conditioner reaches a preliminary stable state, that is, a state where the variation of the air conditioner heating capacity is not large, for example, t is 10 min. After the air conditioner starts heating operation, the heating capacity can be gradually increased along with the refrigerant circulation, and when the refrigerant circulation is stable and frosting is not much, the fluctuation of the heating capacity of the air conditioner is not large, which is called as a stable state. And after the air conditioner reaches the initial stable state, starting the capacity attenuation calculation by the control system, recording the maximum operation capacity value Qmax occurring in the operation process by the control system, and determining the actual value of the air conditioner operation capacity attenuation condition according to a preset period from the moment when the maximum operation capacity value Qmax occurs. And then reading the corresponding table 1 under the current operation load from the preset information, and matching according to the table 1 to obtain the current outdoor relative humidity corresponding to the actual value of the current air conditioner operation capacity attenuation condition.
(2) For an air conditioner without an operation capability calculation function, the calculation may be performed by the discharge pressure of the air conditioner compressor. And under a certain operation load demand condition, determining an actual value of the exhaust pressure attenuation condition as an actual value of the air conditioner operation capacity attenuation condition to determine the current outdoor relative humidity.
The specific implementation method comprises the following steps: after the air conditioner heating start operation is performed for t time, the air conditioner reaches a preliminary stable state, that is, a state where the variation of the air conditioner heating capacity is not large, for example, t is 10 min. After the air conditioner starts heating operation, the heating capacity can be gradually increased along with the refrigerant circulation, and when the refrigerant circulation is stable and frosting is not much, the fluctuation of the heating capacity of the air conditioner is not large, which is called as a stable state. After the air conditioner reaches a preliminary stable state, starting exhaust pressure attenuation calculation by a control system, recording a maximum exhaust pressure value Pmax occurring in the operation process by the control system, starting at the moment when the maximum exhaust pressure value Pmax occurs, determining an actual value of the exhaust pressure attenuation situation according to a preset period, and taking the actual value of the exhaust pressure attenuation situation as an actual value of the air conditioner operation capacity attenuation situation. And then reading the corresponding table 1 under the current operation load from the preset information, and matching according to the table 1 to obtain the current outdoor relative humidity corresponding to the actual value of the current air conditioner operation capacity attenuation condition.
The above attenuation conditions include: the rate of decay over a preset period or the magnitude of decay over a preset period.
Specifically, the corresponding relationship between the different operation capacity attenuation situations or the different exhaust pressure attenuation situations of the air conditioner under different operation loads and the outdoor relative humidity can be obtained in advance through experiments, as shown in table 1, where table 1 takes the attenuation rate as an example for description. And then, when the actual operation of the air conditioner is controlled, the current outdoor relative humidity is matched and determined by utilizing the corresponding relation under the current operation load of the air conditioner.
TABLE 1 corresponding relationship table of capacity fading rate and outdoor relative humidity
| Rate of decay of runnability epsilon | Exhaust pressure decay Rate ε | Relative humidity of environment |
| 0＜ε≤ε1 | 0＜ε≤ε3 | Low humidity |
| ε1＜ε≤ε2 | ε3＜ε≤ε4 | Middle humidity |
| ε＞ε2 | ε＞ε4 | High humidity |
Of course, the method for acquiring the outdoor relative humidity is not limited to the above two methods, and the humidity value may be directly acquired by the humidity sensor or acquired by the weather information. Specifically, if the humidity value is less than or equal to 65%, it is considered that the current outdoor is in the low humidity range, if the humidity value is greater than 65% and less than or equal to 85%, it is considered that the current outdoor is in the medium humidity range, and if the humidity value is greater than 85%, it is considered that the current outdoor is in the high humidity range.
The method for acquiring the outdoor relative humidity through the air conditioner operation capacity attenuation condition or the exhaust pressure attenuation condition is characterized in that the outdoor relative humidity range is determined through the air conditioner operation parameters, a humidity sensor is not needed, and hardware cost investment is not increased.
The optimal execution time of the small-period defrosting mode corresponding to different outdoor temperatures and outdoor relative humidities can be pre-established according to experimental tests.
When the small-cycle defrosting execution time is judged by taking the exhaust pressure attenuation situation as the air conditioner operation capacity attenuation situation, the exhaust pressure attenuation situation is recorded as the value A, and the corresponding relation is established as shown in a table 2. When the small-cycle defrosting execution time is judged according to the directly obtained air conditioner operation capacity attenuation situation, the air conditioner operation capacity attenuation situation is recorded as A', and the corresponding relation is established as shown in a table 3. In tables 2 and 3, "not executing" means not executing the small-cycle defrosting control, and here, the preset value may also be set as described in the above embodiments.
TABLE 2 exhaust pressure decay case A value-taking table
TABLE 3 table for values of attenuation A' of air conditioner operation ability
Illustratively, the optimum a value is given for the case where the small-cycle defrosting execution timing is determined with the discharge pressure fade as the air conditioner operation capability fade, as shown in table 4. In practical application, the attenuation rate is not calculated, a method of judging whether the attenuation amplitude reaches a target value within fixed time is adopted, calculation is reduced, and an actual program is simpler to execute. In table 4, a value a represents an exhaust pressure attenuation range in a fixed time, specifically, an attenuation amplitude value of a saturation temperature corresponding to an exhaust pressure at which the air conditioner continuously operates for 2 min. For example, the outdoor temperature is 2 ℃, the outdoor relative humidity is detected to be low humidity, and when the saturation temperature corresponding to the exhaust pressure decays to 3 ℃ within 2min, the defrosting mode is switched to the small-period defrosting mode.
TABLE 4 value example table of exhaust pressure attenuation A
The above embodiments provide an environment adaptive frostless control scheme, and an optimal control rule is established in combination with an experimental test, so that an execution time for small-cycle defrosting under a specific environment condition is given, an optimal time for executing the small-cycle defrosting adapted to an outdoor environment is determined, optimal control for the small-cycle defrosting is realized, ineffective small-cycle defrosting is avoided, and frostless operation of an air conditioner is realized.
Based on the same inventive concept, the embodiment of the invention also provides a defrosting control device, which can be used for realizing the defrosting control method in the embodiment. The device can be implemented by software and/or hardware, and the device can be generally integrated in a control system of an air conditioner.
Fig. 3 is a block diagram of a defrosting control apparatus according to an embodiment of the present invention, and as shown in fig. 3, the apparatus includes:
an obtaining module 31, configured to obtain outdoor environment data when the air conditioner operates in a heating mode;
a determining module 32, configured to determine a target value of a corresponding air conditioner operation capacity attenuation condition according to the outdoor environment data;
and the control module 33 is used for controlling the air conditioner to be switched to the defrosting mode when the actual value of the running capacity attenuation situation of the air conditioner reaches the target value.
Optionally, the outdoor environment data includes: outdoor relative humidity and outdoor temperature;
the determination module 32 includes:
a first determining unit, configured to determine a humidity range corresponding to the outdoor relative humidity, and determine a temperature range in which the outdoor temperature is located;
and the second determining unit is used for determining the target value of the corresponding air-conditioning operation capacity attenuation situation according to a preset humidity range, a corresponding relation between a temperature range and the target value of the air-conditioning operation capacity attenuation situation, the humidity range corresponding to the outdoor relative humidity and the temperature range where the outdoor temperature is located.
Optionally, the first determining unit is configured to determine a humidity range corresponding to the outdoor relative humidity by at least one of:
determining a humidity range corresponding to the outdoor relative humidity according to the actual value of the air conditioner operation capacity attenuation condition;
acquiring a first humidity value by using a humidity sensor, and determining a humidity range in which the first humidity value is located according to a preset humidity threshold value to serve as a humidity range corresponding to the outdoor relative humidity;
and acquiring a second humidity value through weather information, and determining a humidity range where the second humidity value is located according to a preset humidity threshold value to serve as the humidity range corresponding to the outdoor relative humidity.
Optionally, the first determining unit includes:
the first acquisition subunit is used for acquiring an actual value of the air conditioner operation capacity attenuation condition;
the second acquisition subunit is used for acquiring the current operation load of the air conditioner;
and the determining subunit is configured to determine, according to a preset correspondence between an air conditioner operation capacity attenuation condition under the current operation load and an environment humidity range, an environment humidity range corresponding to an actual value of the air conditioner operation capacity attenuation condition as a humidity range corresponding to the outdoor relative humidity.
Optionally, the first obtaining subunit is specifically configured to:
controlling the air conditioner to enter a heating mode to run for a preset time, and starting capacity attenuation calculation;
recording the maximum operation capacity value appearing in the operation process of the air conditioner;
determining an actual value of the air conditioner operation capacity attenuation condition according to a preset period from the moment when the maximum operation capacity value appears;
wherein the air conditioner operation capacity attenuation condition comprises: and the air conditioner operation capacity attenuation rate or the air conditioner operation capacity attenuation amplitude in the preset period.
Optionally, the first obtaining subunit is specifically configured to:
controlling the air conditioner to enter a heating mode to run for a preset time, and starting capacity attenuation calculation;
recording the maximum exhaust pressure value occurring in the running process of the air conditioner;
determining an actual value of the exhaust pressure attenuation situation according to a preset period from the moment when the maximum exhaust pressure value appears, and taking the actual value of the exhaust pressure attenuation situation as the actual value of the air conditioner operation capacity attenuation situation;
wherein the exhaust pressure decay scenario comprises: the exhaust pressure decay rate or the exhaust pressure decay amplitude in the preset period.
The device can execute the method provided by the embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided in the embodiment of the present invention.
The embodiment of the invention also provides an air conditioner which comprises the defrosting control device in the embodiment.
Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the defrosting control method according to the above embodiments.
An embodiment of the present invention further provides an electronic device, including: one or more processors; a memory for storing one or more programs that, when executed by the one or more processors, cause the one or more processors to implement the defrosting control method as described in the embodiments above.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on the understanding, the above technical solutions substantially or otherwise contributing to the prior art may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the various embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A defrosting control method is characterized by comprising the following steps:
when the air conditioner operates in a heating mode, acquiring outdoor environment data;
determining a target value of the corresponding air conditioner operation capacity attenuation condition according to the outdoor environment data;
when the actual value of the running capacity attenuation situation of the air conditioner reaches the target value, controlling the air conditioner to be switched to a defrosting mode;
the outdoor environment data includes: outdoor relative humidity and outdoor temperature;
determining a target value of a corresponding air conditioner operation capacity attenuation situation according to the outdoor environment data, wherein the target value comprises the following steps:
determining a humidity range corresponding to the outdoor relative humidity, and determining a temperature range in which the outdoor temperature is located;
determining a target value of the corresponding air conditioner operation capacity attenuation condition according to a preset humidity range, a corresponding relation between a temperature range and the target value of the air conditioner operation capacity attenuation condition, a humidity range corresponding to the outdoor relative humidity and a temperature range where the outdoor temperature is located;
determining a humidity range corresponding to the outdoor relative humidity, including: determining a humidity range corresponding to the outdoor relative humidity according to the actual value of the air conditioner operation capacity attenuation condition;
determining a humidity range corresponding to the outdoor relative humidity according to the actual value of the air conditioner operation capacity attenuation condition, wherein the humidity range comprises:
acquiring an actual value of the air conditioner operation capacity attenuation condition;
acquiring the current operation load of the air conditioner;
and determining an environment humidity range corresponding to the actual value of the air conditioner operation capacity attenuation condition according to a preset corresponding relation between the air conditioner operation capacity attenuation condition under the current operation load and the environment humidity range, and taking the environment humidity range as a humidity range corresponding to the outdoor relative humidity.
2. The method of claim 1, wherein obtaining the actual value of the degradation of the air conditioning operation capacity comprises:
controlling the air conditioner to enter a heating mode to operate for a preset time, and then starting capacity attenuation calculation;
recording the maximum operation capacity value in the operation process of the air conditioner;
determining an actual value of the air conditioner operation capacity attenuation condition according to a preset period from the moment when the maximum operation capacity value appears;
wherein the condition of the attenuation of the air conditioner running capacity comprises the following steps: and the air conditioner operation capacity attenuation rate or the air conditioner operation capacity attenuation amplitude in the preset period.
3. The method of claim 1, wherein obtaining the actual value of the degradation of the air conditioning operation capacity comprises:
controlling the air conditioner to enter a heating mode to run for a preset time, and starting capacity attenuation calculation;
recording the maximum exhaust pressure value occurring in the running process of the air conditioner;
determining an actual value of the exhaust pressure attenuation situation according to a preset period from the moment when the maximum exhaust pressure value appears, and taking the actual value of the exhaust pressure attenuation situation as the actual value of the air conditioner operation capacity attenuation situation;
wherein the exhaust pressure decay scenario comprises: and the exhaust pressure decay rate or the exhaust pressure decay amplitude in the preset period.
4. A defrosting control device characterized by comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring outdoor environment data when the air conditioner operates in a heating mode;
the determining module is used for determining a target value of the corresponding air conditioner operation capacity attenuation situation according to the outdoor environment data;
the control module is used for controlling the air conditioner to be switched to a defrosting mode when the actual value of the air conditioner running capacity attenuation situation reaches the target value;
the outdoor environment data includes: outdoor relative humidity and outdoor temperature;
the determining module comprises:
a first determining unit, configured to determine a humidity range corresponding to the outdoor relative humidity, and determine a temperature range in which the outdoor temperature is located;
the second determining unit is used for determining the target value of the corresponding air conditioner operation capacity attenuation situation according to a preset humidity range, a corresponding relation between a temperature range and the target value of the air conditioner operation capacity attenuation situation, the humidity range corresponding to the outdoor relative humidity and the temperature range where the outdoor temperature is located;
the first determining unit is specifically configured to determine a humidity range corresponding to the outdoor relative humidity according to the actual value of the air conditioner operation capacity attenuation condition;
the first determination unit includes:
the first acquisition subunit is used for acquiring an actual value of the air conditioner operation capacity attenuation condition;
the second acquiring subunit is used for acquiring the current operating load of the air conditioner;
and the determining subunit is configured to determine, according to a preset correspondence between an air conditioner operation capacity attenuation condition under the current operation load and an environment humidity range, an environment humidity range corresponding to an actual value of the air conditioner operation capacity attenuation condition as a humidity range corresponding to the outdoor relative humidity.
5. An air conditioner, comprising: the defrosting control device of claim 4.
6. A computer-readable storage medium on which a computer program is stored, the program, when executed by a processor, implementing the defrosting control method according to any one of claims 1 to 3.
7. An electronic device, comprising: one or more processors; memory for storing one or more programs, wherein the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the defrosting control method of any of claims 1 to 3.
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| EP0462524A2 (en) * | 1990-06-18 | 1991-12-27 | Sanyo Electric Co., Ltd | Defrost control method for a heat pump |
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| CN105066377B (en) * | 2015-09-10 | 2017-12-12 | Tcl空调器(中山)有限公司 | Defrosting control method, device and the air conditioner of air conditioner |
| CN109028463A (en) * | 2018-05-24 | 2018-12-18 | 青岛海尔空调器有限总公司 | Air conditioner defrosting control method |
| CN109163416B (en) * | 2018-08-13 | 2023-06-30 | 珠海格力电器股份有限公司 | Defrosting control method and device of equipment and equipment |
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