CN112628940A

CN112628940A - Air conditioner defrosting control method and device, storage medium and air conditioner

Info

Publication number: CN112628940A
Application number: CN202011459028.3A
Authority: CN
Inventors: 田雅颂; 徐耿彬; 廖敏; 梁博; 翟振坤; 熊绍森
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-04-09
Anticipated expiration: 2040-12-11
Also published as: CN112628940B; WO2022121351A1

Abstract

The invention provides an air conditioner defrosting control method, an air conditioner defrosting control device, a storage medium and an air conditioner, wherein the method comprises the following steps: after an air conditioner is started and enters a heating mode, judging whether the air conditioner meets the condition of entering a first defrosting mode; if the condition of entering a first defrosting mode is judged to be met, controlling the air conditioner to enter the first defrosting mode for defrosting, and judging whether the defrosting times of entering the first defrosting mode for defrosting reach preset defrosting times or not; if the defrosting times reach the preset defrosting times, controlling the air conditioner to enter a second defrosting mode or a third defrosting mode according to whether the air conditioner meets the condition of entering the second defrosting mode and/or the condition of entering the third defrosting mode after the defrosting is finished; the defrosting mode of the first defrosting mode and the second defrosting mode is that four-way valve defrosting is not changed; and the third defrosting mode is four-way valve reversing defrosting. The invention can prolong the heating time of the air conditioner under the condition of ensuring that the temperature in the room is reduced.

Description

Air conditioner defrosting control method and device, storage medium and air conditioner

Technical Field

The invention relates to the field of control, in particular to an air conditioner defrosting control method and device, a storage medium and an air conditioner.

Background

The existing air conditioner adopts a heat pump type air conditioner, and provides heat for the indoor in cold seasons. After the air conditioner operates for a period of time, the heat exchanger of the outdoor unit often frosts, the heat exchange efficiency of the air conditioner is affected, the thickness of a frost layer even covers the outdoor unit in severe weather, the comfort of a user using the air conditioner is seriously affected, and the problem is generally solved by defrosting of the air conditioner. The prior defrosting modes comprise various defrosting modes such as reversing defrosting and non-reversing defrosting. However, the defrosting modes are controlled in a combined mode, the indoor room comfort is maximized, and a corresponding solution is not provided.

Disclosure of Invention

The invention mainly aims to overcome the defects of the prior art and provides an air conditioner defrosting control method, an air conditioner defrosting control device, a storage medium and an air conditioner, so as to solve the problem that the comfort maximization is achieved by means of combined control of a plurality of defrosting modes which are not realized in the prior art.

The invention provides an air conditioner defrosting control method on one hand, which comprises the following steps: after an air conditioner is started and enters a heating mode, judging whether the air conditioner meets the condition of entering a first defrosting mode; if the condition of entering a first defrosting mode is judged to be met, controlling the air conditioner to enter the first defrosting mode for defrosting, and judging whether the defrosting times of the air conditioner entering the first defrosting mode for defrosting reach preset defrosting times or not; if the defrosting times reach the preset defrosting times, controlling the air conditioner to enter a second defrosting mode or a third defrosting mode according to whether the air conditioner meets the condition of entering the second defrosting mode and/or the condition of entering the third defrosting mode after the defrosting is finished; the defrosting mode of the first defrosting mode and the second defrosting mode is that four-way valve defrosting is not changed; the first defrosting mode is used for defrosting according to a first frosting degree, the second defrosting mode is used for defrosting according to a second frosting degree, and the thickness of a frost layer of the first frosting degree is smaller than that of the frost layer of the second frosting degree; and the third defrosting mode is four-way valve reversing defrosting.

Optionally, if it is determined that the defrosting frequency of the air conditioner entering the first defrosting mode for defrosting does not reach a preset defrosting frequency, after defrosting is finished, it is determined again whether the air conditioner meets the condition of entering the first defrosting mode.

Optionally, the preset defrosting times are determined according to the sections to which the outdoor environment temperature belongs in more than two temperature sections divided according to the first mode; and when the outdoor environment temperature is in different temperature intervals, different preset defrosting times are corresponded.

Optionally, controlling the air conditioner to enter the second defrosting mode or the third defrosting mode according to whether the air conditioner meets a condition of entering the second defrosting mode and/or a condition of entering the third defrosting mode, including: judging whether the air conditioner meets the condition of entering a second defrosting mode or not; when the condition of entering a second defrosting mode is judged to be met, controlling the air conditioner to enter the second defrosting mode; after the air conditioner is controlled to enter a second defrosting mode, judging whether defrosting time of entering the second defrosting mode exceeds preset defrosting time or not; if the defrosting time exceeds the preset defrosting time, controlling whether the air conditioner enters a third defrosting mode or not according to whether the air conditioner meets the condition of entering the third defrosting mode or not after defrosting is finished; or judging whether the air conditioner meets the condition of entering a third defrosting mode or not, and simultaneously judging whether the air conditioner meets the condition of entering a second defrosting mode or not; when the condition for entering the third defrosting mode is judged to be met but the condition for entering the second defrosting mode is not met, controlling the air conditioner to enter the third defrosting mode; when the condition of entering a second defrosting mode is judged to be met, controlling the air conditioner to enter the second defrosting mode; after the air conditioner is controlled to enter a second defrosting mode, judging whether defrosting time of entering the second defrosting mode exceeds preset defrosting time or not; and if the defrosting time exceeds the preset defrosting time, controlling whether the air conditioner enters the third defrosting mode or not according to whether the air conditioner meets the condition of entering the third defrosting mode or not after defrosting is finished.

Optionally, the preset defrosting time is determined according to an interval to which the outdoor environment temperature belongs in more than two temperature intervals divided according to a second mode; and when the outdoor environment temperature is in different temperature intervals, different preset defrosting times are corresponded.

In another aspect, the present invention provides an air conditioner defrosting control apparatus, including: the first judgment unit is used for judging whether the air conditioner meets the condition of entering a first defrosting mode after the air conditioner is started to enter a heating mode; the first control unit is used for controlling the air conditioner to enter a first defrosting mode for defrosting if the first judgment unit judges that the condition for entering the first defrosting mode is met; the second judging unit is used for judging whether the defrosting times of the air conditioner entering the first defrosting mode for defrosting reach preset defrosting times or not; the second control unit is used for controlling the air conditioner to enter a second defrosting mode or a third defrosting mode according to whether the air conditioner meets the condition of entering the second defrosting mode and/or the condition of entering the third defrosting mode after defrosting is finished if the second judgment unit judges that the defrosting frequency reaches the preset defrosting frequency; the defrosting mode of the first defrosting mode and the second defrosting mode is that four-way valve defrosting is not changed; the first defrosting mode is used for defrosting according to a first frosting degree, the second defrosting mode is used for defrosting according to a second frosting degree, and the thickness of a frost layer of the first frosting degree is smaller than that of the frost layer of the second frosting degree; and the third defrosting mode is four-way valve reversing defrosting.

Optionally, the first determining unit is further configured to: if the second judging unit judges that the defrosting times of the air conditioner entering the first defrosting mode for defrosting does not reach the preset defrosting times, after defrosting is finished, whether the air conditioner meets the condition of entering the first defrosting mode is judged again.

Optionally, the controlling, by the second control unit, the air conditioner to enter the second defrosting mode or the third defrosting mode according to whether the air conditioner meets a condition of entering the second defrosting mode and/or a condition of entering the third defrosting mode includes: judging whether the air conditioner meets the condition of entering a second defrosting mode or not; when the condition of entering a second defrosting mode is judged to be met, controlling the air conditioner to enter the second defrosting mode; after the air conditioner is controlled to enter a second defrosting mode, judging whether defrosting time of entering the second defrosting mode exceeds preset defrosting time or not; if the defrosting time exceeds the preset defrosting time, controlling whether the air conditioner enters a third defrosting mode or not according to whether the air conditioner meets the condition of entering the third defrosting mode or not after defrosting is finished; or judging whether the air conditioner meets the condition of entering a third defrosting mode or not, and simultaneously judging whether the air conditioner meets the condition of entering a second defrosting mode or not; when the condition for entering the third defrosting mode is judged to be met but the condition for entering the second defrosting mode is not met, controlling the air conditioner to enter the third defrosting mode; when the condition of entering a second defrosting mode is judged to be met, controlling the air conditioner to enter the second defrosting mode; after the air conditioner is controlled to enter a second defrosting mode, judging whether defrosting time of entering the second defrosting mode exceeds preset defrosting time or not; and if the defrosting time exceeds the preset defrosting time, controlling whether the air conditioner enters the third defrosting mode or not according to whether the air conditioner meets the condition of entering the third defrosting mode or not after defrosting is finished.

A further aspect of the invention provides a storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the methods described above.

Yet another aspect of the present invention provides an air conditioner comprising a processor, a memory, and a computer program stored on the memory and operable on the processor, wherein the processor implements the steps of any of the methods described above when executing the program.

The invention further provides an air conditioner which comprises the defrosting control device of the air conditioner.

According to the technical scheme of the invention, through cooperative control of a plurality of defrosting modes, the requirements of users on comfort are met while defrosting is rapidly realized, the sustainable heating time is prolonged, and the method can be realized on the conventional electronic expansion valve air conditioner without increasing the cost.

After the air conditioner is started for the first time and operated, the first defrosting mode is executed before the second defrosting mode and the third defrosting mode, firstly, the thin defrosting is carried out, then, the thick defrosting is carried out, firstly, the four-way valve is not reversed to defrost, and then the four-way valve is reversed to defrost, so that the heating time of the air conditioner can be prolonged under the condition that the temperature in a room is lower, the user demands for comfort can be taken into account while defrosting quickly, and the continuous heating time can be prolonged.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of a defrosting control method for an air conditioner according to an embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating a defrosting control method for an air conditioner according to an embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating a defrosting control method for an air conditioner according to another embodiment of the present invention;

fig. 4 is a block diagram of an embodiment of an air conditioner defrosting control device provided by the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, 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.

The invention provides an air conditioner defrosting control method. The air conditioner comprises a first defrosting mode, a second defrosting mode and a third defrosting mode; the defrosting mode of the first defrosting mode and the second defrosting mode is that the four-way valve does not change direction to defrost, namely the four-way valve does not change direction, and the air conditioner keeps a heating state during defrosting. The non-reversing defrosting comprises the following steps: and defrosting is carried out under the condition that the four-way valve is not reversed by the combined control of the running frequency of the compressor, the electronic expansion valve, the outer fan, the inner fan and the electric auxiliary heating device.

The first defrosting mode is used for defrosting according to a first frosting degree, the second defrosting mode is used for defrosting according to a second frosting degree, the thickness of a frost layer of the first frosting degree is smaller than that of the frost layer of the second frosting degree, namely the first defrosting mode is used for defrosting according to the condition that the frost layer is thin, and the second defrosting mode is used for defrosting according to the condition that the frost layer is thick. For example, the first frost removal mode is thin frost removal, and the second frost removal mode is thick frost removal.

In the initial frosting stage, the frost layer can increase the heat transfer coefficient of the heat exchanger, so that the frost layer has a certain positive effect, when the frost layer is continuously thickened, the air resistance of the heat exchanger is increased, the total heat exchange amount is reduced, and the temperature of the heat exchanger is reduced, therefore, the time point of the first defrosting mode (for example, thin defrosting) is selected when the air conditioner is still in a thin frosting state.

The control mode of the first defrosting mode is that the thin frost is quickly melted under the condition that the four-way valve is not reversed through the joint control of the running frequency of the compressor, the opening of the electronic expansion valve, the rotating speed of the outer fan, the rotating speed of the inner fan and the electric auxiliary heating device. Specifically, the operation frequency of the compressor is controlled to be reduced to a first preset frequency, the opening of the electronic expansion valve is increased to a first preset opening, the rotating speed of the outer fan is unchanged or stopped, the rotating speed of the inner fan is reduced to a first preset rotating speed value, and/or the electric auxiliary heating device is started.

The defrosting time point of the second defrosting mode is that when the temperature of the heat exchanger is low and the frost layer is thick, the frost layer is thick at the moment, and the outdoor unit needs more heat to melt the frost layer, so that in the second defrosting mode, although heat is not absorbed from the indoor side (the four-way valve is not reversed), heat is not basically provided for the indoor side, and main heat is used for defrosting of the outdoor unit.

The control mode of the second frost removing mode is that thick frost of the outdoor unit is removed under the condition that the four-way valve is not reversed through the combined control of the running frequency of the compressor, the opening degree of the electronic expansion valve, the rotating speed of the outer fan, the rotating speed of the inner fan and the electric auxiliary heating device. Specifically, the operation frequency of the compressor is controlled to be increased to a second preset frequency or the current frequency is kept, the opening of the electronic expansion valve is increased to a second preset opening, the rotating speed of the outer fan is unchanged or stopped, the rotating speed of the inner fan is reduced to a second preset rotating speed value, and/or the electric auxiliary heating device is started.

The second preset frequency is higher than the first preset frequency. The second preset opening degree is opened for a duration longer than the first preset opening degree. The second preset rotating speed value is lower than the first preset rotating speed value. When the first defrosting mode is used for defrosting, the frequency is reduced, the opening degree is increased for a longer time, and the rotating speed of a fan in the second defrosting mode is lower than that in the second defrosting mode, so that the heat of the air conditioning system in the second defrosting mode is mainly used for thick defrosting of the outdoor unit. The first defrosting mode can also provide certain heat to the indoor side when melting the thin frost of off-premises station, guarantees the travelling comfort.

The thickness of the frost layer is different, and the defrosting condition is different. The second defrosting mode (e.g., thick defrosting) enters defrosting when the frost layer is thick, and requires more heat to melt the frost layer, so that defrosting lasts longer than that of the first defrosting mode (e.g., thin defrosting). During defrosting, the actions on the relevant actuators are also different.

The third defrosting mode is the four-way valve reversing defrosting mode, namely the four-way valve reversing mode is switched from the heating mode to the cooling mode, so that high-temperature gas discharged by the compressor enters the outdoor unit, and the outdoor unit heat exchanger is defrosted. And when the temperature of the outdoor unit heat exchanger is low and the frost layer is thick, the four-way valve is reversed and defrosted by adopting a third defrosting mode.

Fig. 1 is a schematic method diagram of an embodiment of an air conditioner defrosting control method provided by the invention.

As shown in fig. 1, according to an embodiment of the present invention, the control method includes at least step S110, step S120, and step S130.

Step S110, after the air conditioner is started to enter a heating mode, judging whether the air conditioner meets the condition of entering a first defrosting mode.

Specifically, the condition for entering the first defrosting mode includes that a first heating operation time of the air conditioner reaches a first preset defrosting time, and the temperature of an outdoor heat exchanger of the air conditioner is lower than a first preset temperature threshold; the first heating runtime includes: the interval from start-up (in the case of no or no frost on start-up) or the interval from last defrosting (whichever defrosting mode); the condition for entering the second defrosting mode comprises that the second heating running time of the air conditioner reaches a second preset defrosting time, and the temperature of an outdoor heat exchanger of the air conditioner is lower than a second preset temperature threshold; the second heating runtime includes: the time interval from the start-up (in the case of no or defrosting at the start-up) or the time interval from the last defrosting in the second defrosting mode or the third defrosting mode. The condition for entering the third defrosting mode comprises that the third heating operation time of the air conditioner reaches a third preset defrosting time, and the temperature of an outdoor heat exchanger of the air conditioner is lower than a third preset temperature threshold; the third heating runtime comprising: the time interval from the start-up (in the case of no or defrosting at the start-up) or the time interval from the last defrosting in the second defrosting mode or the third defrosting mode. The first preset temperature threshold is larger than the second preset temperature threshold and larger than the third preset temperature threshold.

And step S120, if the condition of entering the first defrosting mode is judged to be met, controlling the air conditioner to enter the first defrosting mode for defrosting, and judging whether the defrosting times of the air conditioner entering the first defrosting mode for defrosting reach preset defrosting times.

And if the condition of entering the first defrosting mode is judged to be met, controlling the air conditioner to enter the first defrosting mode for defrosting, simultaneously recording the times of entering the first defrosting mode, and judging whether the defrosting times of entering the first defrosting mode for defrosting of the air conditioner reaches the preset defrosting times. The preset defrosting times are determined according to the sections of the outdoor environment temperature in more than two temperature sections divided according to the first mode. And when the outdoor environment temperature is in different temperature intervals, different preset defrosting times are corresponded.

For example, referring to table 1, the outdoor ambient temperature is divided into 5 temperature zones, and different temperature zones i, ii, iii, iv and v correspond to different preset defrosting times n1, n2, n3, n4 and n5, respectively.

TABLE 1

The more than two temperature intervals divided according to the first mode comprise an intermediate temperature interval; the preset defrosting times corresponding to the temperature interval with the temperature value higher than the intermediate temperature interval are sequentially reduced from high to low according to the interval temperature value; and the preset defrosting times corresponding to the temperature interval with the temperature value lower than the intermediate temperature interval are sequentially increased from high to low according to the interval temperature value.

For example, the temperature values in the intervals I to V in Table 1 are sequentially reduced, wherein the interval III (-5 ℃ and T outer ring is less than or equal to 1 ℃) is an intermediate temperature interval, the corresponding preset defrosting times are n3, and the temperature is higher than that in the interval I and the interval II of the interval III, the corresponding preset defrosting times n1 is more than or equal to n2 and more than or equal to n 3; the preset defrosting times n5 which are corresponding to the V interval and the IV interval with the temperature higher than the III interval are more than or equal to n4 more than or equal to n 3; ni is more than or equal to 0 and less than or equal to 20 times.

And step S130, if the defrosting frequency is judged to reach the preset defrosting frequency, after defrosting is finished, controlling the air conditioner to enter a second defrosting mode or a third defrosting mode according to whether the air conditioner meets the condition of entering the second defrosting mode and/or the condition of entering the third defrosting mode.

If the defrosting frequency does not reach the preset defrosting frequency, judging whether the air conditioner meets the condition of entering the first defrosting mode again after defrosting is finished, controlling the air conditioner to enter the first defrosting mode again to defrost until the frequency of entering the first defrosting mode reaches the preset defrosting frequency (determined according to the current outdoor environment temperature), and controlling the air conditioner to enter the second defrosting mode or the third defrosting mode according to whether the air conditioner meets the condition of entering the second defrosting mode and/or the condition of entering the third defrosting mode after defrosting is finished.

Specifically, after defrosting is finished in each first defrosting mode, if the number of times of entering the first defrosting mode at present does not reach the preset defrosting number (determined according to the current outdoor environment temperature), heating operation is continued, whether the air conditioner meets the condition of entering the first defrosting mode is continuously judged until the number of times of entering the first defrosting mode at present reaches the preset defrosting number (determined according to the current outdoor environment temperature), and after defrosting is finished, the air conditioner is controlled to enter the second defrosting mode or the third defrosting mode according to whether the air conditioner meets the condition of entering the second defrosting mode and/or the condition of entering the third defrosting mode. Whether the second defrosting mode is finished is determined by judging whether the temperature of the outdoor heat exchanger (such as the temperature of the outdoor heat exchanger tube or the temperature of the condenser inlet) reaches a first preset temperature value, namely, the defrosting is finished when the temperature of the outdoor heat exchanger reaches the preset temperature value.

In a specific embodiment, whether the air conditioner meets the condition of entering a second defrosting mode is judged; when the condition of entering a second defrosting mode is judged to be met, controlling the air conditioner to enter the second defrosting mode; after the air conditioner is controlled to enter a second defrosting mode, judging whether defrosting time of entering the second defrosting mode exceeds preset defrosting time or not; and if the defrosting time exceeds the preset defrosting time, controlling whether the air conditioner enters the third defrosting mode or not according to whether the air conditioner meets the condition of entering the third defrosting mode or not after defrosting is finished. Specifically, whether the second defrosting mode is finished is determined by judging whether the temperature of the outdoor heat exchanger (for example, the temperature of the outdoor heat exchanger tube or the temperature of the condenser inlet) reaches a second preset temperature value, that is, the defrosting is finished when the temperature of the outdoor heat exchanger reaches the preset temperature value. The second preset temperature value is greater than the first preset temperature value.

Specifically, after the first defrosting mode meets the preset defrosting times, the following heating operation is carried out, whether the air conditioner meets the conditions of the second defrosting mode is judged, if yes, the second defrosting mode is entered, defrosting time of the second defrosting mode is recorded, if the current defrosting time exceeds the preset duration, the next defrosting enters the third defrosting mode, and meanwhile, the recording times of the first defrosting mode and the recording time of the second defrosting mode are cleared. After the third defrosting mode is entered and defrosting is finished, returning to judge whether the condition of entering the first defrosting mode is met again; if the condition of entering a first defrosting mode is judged to be met, controlling the air conditioner to enter the first defrosting mode for defrosting, and judging whether the defrosting times of the air conditioner entering the first defrosting mode for defrosting reach preset defrosting times or not; and if the defrosting times reach the preset defrosting times, controlling the air conditioner to enter a second defrosting mode or a third defrosting mode according to whether the air conditioner meets the condition of entering the second defrosting mode and/or the condition of entering the third defrosting mode after the defrosting is finished.

The preset defrosting time is determined according to the outdoor environment temperature in the section where more than two temperature sections divided according to the second mode belong; and when the outdoor environment temperature is in different temperature intervals, different preset defrosting times are corresponded.

For example, referring to table 2, the outdoor ambient temperature is divided into 5 temperature zones, and different temperature zones i, ii, iii, iv and v correspond to different preset defrosting times t1, t2, t3, t4 and t5, respectively.

TABLE 2

The more than two temperature intervals divided according to the second mode comprise an intermediate temperature interval; the preset defrosting time corresponding to the temperature interval with the temperature value higher than the intermediate temperature interval is increased in sequence from high to low according to the interval temperature value; and the preset defrosting time corresponding to the temperature interval with the temperature value lower than the intermediate temperature interval is sequentially reduced from high to low according to the interval temperature value.

For example, the temperature values in the intervals I to V in Table 1 are sequentially reduced, wherein the interval III (-5 ℃ < Touter ring ≦ 1 ℃) is an intermediate temperature interval, the corresponding preset defrosting time is n3, and the temperature is higher than that in the interval I in the interval III and the corresponding preset defrosting time T1 ≦ T2 ≦ T3 in the interval II; the preset defrosting times t5 and t4 and t3 corresponding to the V interval and the IV interval with the temperature higher than the III interval are respectively greater than or equal to t4 and less than or equal to t 3; ti is more than or equal to 0 and less than or equal to 20 times.

In another specific embodiment, whether the air conditioner meets the condition of entering a third defrosting mode is judged, and whether the air conditioner meets the condition of entering a second defrosting mode is judged; when the condition for entering the third defrosting mode is judged to be met but the condition for entering the second defrosting mode is not met, controlling the air conditioner to enter the third defrosting mode; when the condition of entering a second defrosting mode is judged to be met, controlling the air conditioner to enter the second defrosting mode; after the air conditioner is controlled to enter a second defrosting mode, judging whether defrosting time of entering the second defrosting mode exceeds preset defrosting time or not; and if the defrosting time exceeds the preset defrosting time, controlling whether the air conditioner enters the third defrosting mode or not according to whether the air conditioner meets the condition of entering the third defrosting mode or not after defrosting is finished.

Specifically, after the number of times of entering the first defrosting mode reaches the preset defrosting number, and when the air conditioner is operated in a heating mode, whether the air conditioner meets the condition of entering the third defrosting mode is judged, and meanwhile, whether the air conditioner meets the condition of entering the second defrosting mode is judged. If the condition for entering the third defrosting mode is judged to be met but the condition for entering the second defrosting mode is not met, entering the third defrosting mode, and simultaneously resetting the times of the first defrosting mode and the time of the second defrosting mode; if the condition for entering the second defrosting mode is judged to be met (meanwhile, the condition for entering the third defrosting mode is also met), entering the second defrosting mode for defrosting, and recording the defrosting time for entering the second defrosting mode; after the air conditioner is controlled to enter a second defrosting mode, whether defrosting time of the second defrosting mode exceeds a first preset time is judged, wherein: if the defrosting time for entering the second defrosting mode does not exceed the preset time length (determined according to the outdoor environment temperature), the recording times of the first defrosting mode are cleared, the method comprises the steps of judging whether an air conditioner meets a first defrosting mode or not, and returning to continue execution of the step of judging whether the air conditioner meets the condition of entering the first defrosting mode or not (namely returning to judge whether the condition of entering the first defrosting mode is met or not again, if the condition of entering the first defrosting mode is met, controlling the air conditioner to enter the first defrosting mode for defrosting, judging whether the defrosting frequency of the air conditioner entering the first defrosting mode for defrosting reaches a preset defrosting frequency or not, and if the defrosting frequency reaches the preset defrosting frequency, controlling the air conditioner to enter a second defrosting mode or a third defrosting mode according to whether the air conditioner meets the condition of entering the second defrosting mode and/or the condition of entering the third defrosting mode or not after defrosting is finished); and if the defrosting time of entering the second defrosting mode exceeds the preset defrosting time, controlling whether the air conditioner enters the third defrosting mode according to whether the air conditioner meets the condition of entering the third defrosting mode in next defrosting, and clearing the recording times of the first defrosting mode and the recording time of the second defrosting mode.

If the defrosting time exceeds the preset defrosting time, the defrosting mode cannot achieve rapid defrosting, and icing phenomena caused by long-time frosting of the outdoor unit are probably caused. A situation in which the room temperature is lowered for a long time is caused. Therefore, if the situation occurs, the next defrosting mode is directly entered into the third defrosting mode, so that the frost layer state of the outdoor unit can be thoroughly cleared.

In the above steps, after the third defrosting mode is entered and defrosting is finished, returning to judge whether the condition of entering the first defrosting mode is met again; if the condition of entering a first defrosting mode is judged to be met, controlling the air conditioner to enter the first defrosting mode for defrosting, and judging whether the defrosting times of the air conditioner entering the first defrosting mode for defrosting reach preset defrosting times or not; and if the defrosting times reach the preset defrosting times, controlling the air conditioner to enter a second defrosting mode or a third defrosting mode according to whether the air conditioner meets the condition of entering the second defrosting mode and/or the condition of entering the third defrosting mode after the defrosting is finished.

TABLE 2

In order to clearly illustrate the technical solution of the present invention, an execution flow of the air conditioner defrosting control method provided by the present invention is described below with a specific embodiment.

Fig. 2 is a schematic method diagram of an embodiment of a defrosting control method for an air conditioner according to the present invention. As shown in fig. 2, the air conditioner is turned on to operate in the heating mode, and whether the air conditioner meets the condition of entering the first defrosting mode is determined, and if yes, the air conditioner enters the first defrosting mode, and the number of times of entering the first defrosting mode is recorded. After defrosting is finished, heating operation is continued, whether the air conditioner meets the condition of entering the first defrosting mode is continuously judged until the frequency of entering the first defrosting mode reaches the preset defrosting frequency (determined according to the current outdoor environment temperature). And after the number of times of entering the first defrosting mode reaches the preset defrosting number, judging whether the air conditioner meets the condition of entering the second defrosting mode during the next heating operation, if not, continuing the normal heating operation, judging whether the condition of entering the first defrosting mode is met, and if so, entering the first defrosting mode. And then normal heating operation is continued. And if the condition of entering the second defrosting mode is met, entering the second defrosting mode, recording defrosting time of entering the second defrosting mode, judging whether the defrosting time of the second defrosting mode exceeds a preset time length, and if the defrosting time of the second defrosting mode does not exceed the first preset time length, returning to the step of judging whether the condition of entering the second defrosting mode is met and continuing to execute. If the defrosting time for entering the second defrosting mode exceeds the preset time (determined according to the outdoor environment temperature), entering the third defrosting mode when the next judgment meets the condition of entering the third defrosting mode, and simultaneously resetting the recording times of the first defrosting mode and the recording time of the second defrosting mode; and after the third defrosting mode is entered and defrosting is executed, returning to the step of judging whether the condition of entering the first defrosting mode is met, and judging again.

Fig. 3 is a schematic method diagram of another embodiment of the defrosting control method of the air conditioner according to the present invention. As shown in fig. 3, the air conditioner is turned on to operate in the heating mode, and whether the air conditioner meets the condition of entering the first defrosting mode is determined, and if yes, the air conditioner enters the first defrosting mode, and the number of times of the first defrosting mode is recorded. After defrosting is finished, heating operation is continued, whether the air conditioner meets the condition of entering the first defrosting mode is continuously judged until the frequency of entering the first defrosting mode reaches the preset defrosting frequency (determined according to the current outdoor environment temperature). After the number of times of entering the first defrosting mode reaches the preset defrosting number of times, and when the air conditioner is operated in a heating mode, whether the air conditioner meets the condition of entering the third defrosting mode is judged, and whether the air conditioner meets the condition of entering the second defrosting mode is judged: and if the condition for entering the third defrosting mode is judged to be met but the condition for entering the second defrosting mode is not met, entering the third defrosting mode, clearing the times of the first defrosting mode and the time of the second defrosting mode, and returning to the step of judging whether the air conditioner meets the first defrosting mode to continue executing after defrosting is finished. If the condition of entering the second defrosting mode is judged to be met, entering the second defrosting mode for defrosting, and recording defrosting time for entering the second defrosting mode; judging whether the defrosting time of the second defrosting mode exceeds a preset time length, wherein: (1) if the defrosting time for entering the second defrosting mode does not exceed the preset time (preset defrosting time) determined according to the outdoor environment temperature, resetting the recorded times of the first defrosting mode, and returning to the step of judging whether the air conditioner meets the first defrosting mode to continue executing; (2) if the defrosting time for entering the second defrosting mode exceeds the preset time (preset defrosting time), entering the third defrosting mode when the condition for entering the third defrosting mode is judged to be met next time, and simultaneously clearing the recording times of the first defrosting mode and the recording time of the second defrosting mode.

The invention provides an air conditioner defrosting control device. The air conditioner comprises a first defrosting mode, a second defrosting mode and a third defrosting mode; the defrosting mode of the first defrosting mode and the second defrosting mode is that the four-way valve does not change direction to defrost, namely the four-way valve does not change direction, and the air conditioner keeps a heating state during defrosting. The non-reversing defrosting comprises the following steps: and defrosting is carried out under the condition that the four-way valve is not reversed by the combined control of the running frequency of the compressor, the electronic expansion valve, the outer fan, the inner fan and the electric auxiliary heating device.

The control mode of the first defrosting mode is that thick frost of the outdoor unit is melted under the condition that the four-way valve is not reversed through the joint control of the running frequency of the compressor, the opening degree of the electronic expansion valve, the rotating speed of the outer fan, the rotating speed of the inner fan and the electric auxiliary heating device. Specifically, the operation frequency of the compressor is controlled to be increased to a second preset frequency or the current frequency is kept, the opening of the electronic expansion valve is increased to a second preset opening, the rotating speed of the outer fan is unchanged or stopped, the rotating speed of the inner fan is reduced to a second preset rotating speed value, and/or the electric auxiliary heating device is started.

Fig. 4 is a block diagram of an embodiment of an air conditioner defrosting control device provided by the present invention. As shown in fig. 4, the control device 100 includes a first determining unit 110, a first control unit 120, a second determining unit 130, and a second control unit 140.

The first determining unit 110 is configured to determine whether the air conditioner satisfies a condition of entering a first defrosting mode after the air conditioner is turned on and enters a heating mode.

The first control unit 120 is configured to control the air conditioner to enter the first defrosting mode for defrosting if the first determining unit 110 determines that the condition for entering the first defrosting mode is met. The second determining unit 130 is configured to determine whether a defrosting frequency of the air conditioner entering the first defrosting mode for defrosting reaches a preset defrosting frequency.

If the first determining unit 110 determines that the condition for entering the first defrosting mode is satisfied, the first control unit 120 controls the air conditioner to enter the first defrosting mode for defrosting, and records the number of times for entering the first defrosting mode, and the second determining unit 130 determines whether the number of times for the air conditioner to enter the first defrosting mode for defrosting reaches a preset defrosting number. The preset defrosting times are determined according to the sections of the outdoor environment temperature in more than two temperature sections divided according to the first mode. And when the outdoor environment temperature is in different temperature intervals, different preset defrosting times are corresponded.

TABLE 1

A second control unit 140, configured to, if the second determining unit 130 determines that the defrosting time reaches a preset defrosting time, after defrosting is finished, control the air conditioner to enter a second defrosting mode or a third defrosting mode according to whether the air conditioner meets a condition of entering the second defrosting mode and/or a condition of entering the third defrosting mode.

If the second determining unit 130 determines that the defrosting frequency does not reach the preset defrosting frequency, after defrosting is finished, the first determining unit 110 determines whether the air conditioner meets the condition of entering the first defrosting mode again, the first control unit 120 controls the air conditioner to enter the first defrosting mode again under the condition that the first determining unit 110 determines that the condition of entering the first defrosting mode is met, until the frequency of entering the first defrosting mode reaches the preset defrosting frequency (determined according to the current outdoor environment temperature), and after defrosting is finished, the second control unit 140 controls the air conditioner to enter the second defrosting mode or the third defrosting mode according to whether the air conditioner meets the condition of entering the second defrosting mode and/or the condition of entering the third defrosting mode.

In one embodiment, the second control unit 140 determines whether the air conditioner satisfies a condition for entering the second defrosting mode; when the condition of entering a second defrosting mode is judged to be met, controlling the air conditioner to enter the second defrosting mode; after the air conditioner is controlled to enter a second defrosting mode, judging whether defrosting time of entering the second defrosting mode exceeds preset defrosting time or not; and if the defrosting time exceeds the preset defrosting time, controlling whether the air conditioner enters the third defrosting mode or not according to whether the air conditioner meets the condition of entering the third defrosting mode or not after defrosting is finished. Specifically, whether the second defrosting mode is finished is determined by judging whether the temperature of the outdoor heat exchanger (for example, the temperature of the outdoor heat exchanger tube or the temperature of the condenser inlet) reaches a second preset temperature value, that is, the defrosting is finished when the temperature of the outdoor heat exchanger reaches the preset temperature value. The second preset temperature value is greater than the first preset temperature value.

TABLE 2

In another specific embodiment, the second control unit 140 determines whether the air conditioner satisfies a condition for entering the third defrosting mode, and simultaneously determines whether the air conditioner satisfies a condition for entering the second defrosting mode; when the condition for entering the third defrosting mode is judged to be met but the condition for entering the second defrosting mode is not met, controlling the air conditioner to enter the third defrosting mode; when the condition of entering a second defrosting mode is judged to be met, controlling the air conditioner to enter the second defrosting mode; after the air conditioner is controlled to enter a second defrosting mode, judging whether defrosting time of entering the second defrosting mode exceeds preset defrosting time or not; and if the defrosting time exceeds the preset defrosting time, controlling whether the air conditioner enters the third defrosting mode or not according to whether the air conditioner meets the condition of entering the third defrosting mode or not after defrosting is finished.

Specifically, after the number of times of entering the first defrosting mode reaches the preset defrosting number, and when the air conditioner is operated in a heating mode, whether the air conditioner meets the condition of entering the third defrosting mode is judged, and meanwhile, whether the air conditioner meets the condition of entering the second defrosting mode is judged. If the condition for entering the third defrosting mode is judged to be met but the condition for entering the second defrosting mode is not met, entering the third defrosting mode, and simultaneously resetting the times of the first defrosting mode and the time of the second defrosting mode; if the condition for entering the second defrosting mode is judged to be met (meanwhile, the condition for entering the third defrosting mode is also met), entering the second defrosting mode for defrosting, and recording the defrosting time for entering the second defrosting mode; after the air conditioner is controlled to enter a second defrosting mode, whether defrosting time of the second defrosting mode exceeds a first preset time is judged, wherein: if the defrosting time for entering the second defrosting mode does not exceed the preset time length (determined according to the outdoor environment temperature), resetting the recording times of the first defrosting mode, and returning to the step of judging whether the air conditioner meets the first defrosting mode to continue executing; and if the defrosting time of entering the second defrosting mode exceeds the preset defrosting time, controlling whether the air conditioner enters the third defrosting mode according to whether the air conditioner meets the condition of entering the third defrosting mode in next defrosting, and clearing the recording times of the first defrosting mode and the recording time of the second defrosting mode.

In the steps executed by the second control unit 140, if the third defrosting mode is entered and defrosting is completed, the second control unit returns to determine whether the condition for entering the first defrosting mode is satisfied again; if the condition of entering a first defrosting mode is judged to be met, controlling the air conditioner to enter the first defrosting mode for defrosting, and judging whether the defrosting times of the air conditioner entering the first defrosting mode for defrosting reach preset defrosting times or not; and if the defrosting times reach the preset defrosting times, controlling the air conditioner to enter a second defrosting mode or a third defrosting mode according to whether the air conditioner meets the condition of entering the second defrosting mode and/or the condition of entering the third defrosting mode after the defrosting is finished.

TABLE 2

The invention also provides a storage medium corresponding to the air conditioner defrosting control method, and a computer program is stored on the storage medium, and when the program is executed by a processor, the program realizes the steps of any one of the methods.

The invention also provides an air conditioner corresponding to the defrosting control method of the air conditioner, which comprises a processor, a memory and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes the steps of any one of the methods when executing the program.

The invention also provides an air conditioner corresponding to the air conditioner defrosting control device, which comprises the air conditioner defrosting control device.

Therefore, the scheme provided by the invention has the advantages that the defrosting is quickly realized and the comfort requirement of a user is considered at the same time through the cooperative control of a plurality of defrosting modes, the sustainable heating time is prolonged, and the method can be realized on the conventional electronic expansion valve air conditioner without increasing the cost. After the air conditioner is started for the first time and operated, the first defrosting mode is executed before the second defrosting mode and the third defrosting mode, firstly, the thin defrosting is carried out, then, the thick defrosting is carried out, firstly, the four-way valve is not reversed to defrost, and then the four-way valve is reversed to defrost, so that the heating time of the air conditioner can be prolonged under the condition that the temperature in a room is lower, the user demands for comfort can be taken into account while defrosting quickly, and the continuous heating time can be prolonged.

The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and the parts serving as the control device may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An air conditioner defrosting control method is characterized by comprising the following steps:

after an air conditioner is started and enters a heating mode, judging whether the air conditioner meets the condition of entering a first defrosting mode;

if the condition of entering a first defrosting mode is judged to be met, controlling the air conditioner to enter the first defrosting mode for defrosting, and judging whether the defrosting times of the air conditioner entering the first defrosting mode for defrosting reach preset defrosting times or not;

if the defrosting times reach the preset defrosting times, controlling the air conditioner to enter a second defrosting mode or a third defrosting mode according to whether the air conditioner meets the condition of entering the second defrosting mode and/or the condition of entering the third defrosting mode after the defrosting is finished;

the defrosting mode of the first defrosting mode and the second defrosting mode is that four-way valve defrosting is not changed; the first defrosting mode is used for defrosting according to a first frosting degree, the second defrosting mode is used for defrosting according to a second frosting degree, and the thickness of a frost layer of the first frosting degree is smaller than that of the frost layer of the second frosting degree; and the third defrosting mode is four-way valve reversing defrosting.

2. The method of claim 1,

and if the defrosting times of the air conditioner entering the first defrosting mode for defrosting do not reach the preset defrosting times, judging whether the air conditioner meets the condition of entering the first defrosting mode again after defrosting is finished.

3. The method according to claim 1, wherein the preset defrosting number is determined according to an interval to which the outdoor ambient temperature belongs in more than two temperature intervals divided in the first manner; and when the outdoor environment temperature is in different temperature intervals, different preset defrosting times are corresponded.

4. The method according to any one of claims 1 to 3, wherein controlling the air conditioner to enter the second defrosting mode or the third defrosting mode according to whether the air conditioner meets a condition of entering the second defrosting mode and/or a condition of entering the third defrosting mode comprises:

judging whether the air conditioner meets the condition of entering a second defrosting mode or not;

when the condition of entering a second defrosting mode is judged to be met, controlling the air conditioner to enter the second defrosting mode;

after the air conditioner is controlled to enter a second defrosting mode, judging whether defrosting time of entering the second defrosting mode exceeds preset defrosting time or not;

if the defrosting time exceeds the preset defrosting time, controlling whether the air conditioner enters a third defrosting mode or not according to whether the air conditioner meets the condition of entering the third defrosting mode or not after defrosting is finished;

alternatively, the first and second electrodes may be,

judging whether the air conditioner meets the condition of entering a third defrosting mode or not, and simultaneously judging whether the air conditioner meets the condition of entering a second defrosting mode or not;

when the condition for entering the third defrosting mode is judged to be met but the condition for entering the second defrosting mode is not met, controlling the air conditioner to enter the third defrosting mode;

and if the defrosting time exceeds the preset defrosting time, controlling whether the air conditioner enters the third defrosting mode or not according to whether the air conditioner meets the condition of entering the third defrosting mode or not after defrosting is finished.

5. The method of claim 4,

6. An air conditioner defrosting control device is characterized by comprising:

the first judgment unit is used for judging whether the air conditioner meets the condition of entering a first defrosting mode after the air conditioner is started to enter a heating mode;

the first control unit is used for controlling the air conditioner to enter a first defrosting mode for defrosting if the first judgment unit judges that the condition for entering the first defrosting mode is met;

the second judging unit is used for judging whether the defrosting times of the air conditioner entering the first defrosting mode for defrosting reach preset defrosting times or not;

the second control unit is used for controlling the air conditioner to enter a second defrosting mode or a third defrosting mode according to whether the air conditioner meets the condition of entering the second defrosting mode and/or the condition of entering the third defrosting mode after defrosting is finished if the second judgment unit judges that the defrosting frequency reaches the preset defrosting frequency;

7. The apparatus of claim 6, wherein the first determining unit is further configured to:

if the second judging unit judges that the defrosting times of the air conditioner entering the first defrosting mode for defrosting does not reach the preset defrosting times, after defrosting is finished, whether the air conditioner meets the condition of entering the first defrosting mode is judged again.

8. The apparatus according to claim 6, wherein the preset defrosting number is determined according to an interval to which the outdoor ambient temperature belongs among two or more temperature intervals divided in the first manner; and when the outdoor environment temperature is in different temperature intervals, different preset defrosting times are corresponded.

9. The apparatus according to any one of claims 6 to 8, wherein the second control unit controls the air conditioner to enter the second defrosting mode or the third defrosting mode according to whether the air conditioner satisfies a condition for entering the second defrosting mode and/or a condition for entering the third defrosting mode, and includes:

alternatively, the first and second electrodes may be,

10. The apparatus of claim 8,

11. A storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 5.

12. An air conditioner, comprising a processor, a memory and a computer program stored in the memory and operable on the processor, wherein the processor executes the program to implement the steps of the method according to any one of claims 1 to 5, or comprises the defrosting control device according to any one of claims 6 to 10.