CN116678073A - Method and device for controlling air conditioner, air conditioner and storage medium - Google Patents

Abstract

The application relates to the technical field of air conditioners, and discloses a method for controlling an air conditioner, wherein the air conditioner comprises an electric heating device, a control device and a control device, wherein the electric heating device is configured to heat an outdoor heat exchanger of the air conditioner; the method comprises the following steps: obtaining a first outlet temperature of the outdoor unit coil; determining whether the air conditioner has a frosting tendency according to the first outlet temperature of the coil pipe of the outdoor unit; in the case of an air conditioner having a tendency to frost, the electric heating device is controlled to operate for heating. And detecting the outlet temperature of the coil pipe of the outdoor unit of the air conditioner, and judging whether the air conditioner has frosting tendency or not according to the outlet temperature of the coil pipe of the outdoor unit. If frosting tends to occur, the electric heating device is immediately started to heat the outdoor heat exchanger, so that frosting of the outdoor heat exchanger is avoided. Therefore, the frosting condition of the outdoor heat exchanger is monitored, and frosting prevention in the heating process is realized, so that the influence of frosting in the heating process is avoided. The application also discloses a device for controlling the air conditioner, the air conditioner and a storage medium.

Description

Method and device for controlling air conditioner, air conditioner and storage medium

Technical Field

The present application relates to the field of air conditioning technology, and for example, to a method and apparatus for controlling an air conditioner, and a storage medium.

Background

When the air conditioner is operated for heating in winter, the outdoor heat exchanger absorbs heat from the outdoor air, and water vapor condenses into frost which is attached to the surface of the outdoor heat exchanger. With the aggravation of the frosting degree of the outdoor heat exchanger, the heat exchange capacity of the outdoor heat exchanger is gradually influenced, and the overall heating efficiency of the air conditioner is further reduced.

There is provided a method for controlling an air conditioner in the related art, including: in the air conditioner operation heating mode process, acquiring accumulated operation time of a compressor and outdoor coil temperature; and after the defrosting entering condition is determined to be met according to the accumulated running time and the temperature of the outdoor coil, controlling the refrigerant flowing through the refrigerant liquid inlet pipeline and the refrigerant liquid outlet pipeline of the outdoor heat exchanger of the air conditioner to be heated.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

defrosting after frosting, the air conditioner still has part of the time to run with the outdoor heat exchanger frosting, resulting in a poor temperature experience for the user.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a method for controlling an air conditioner to avoid frosting of the air conditioner, thereby avoiding influencing a heating process.

In some embodiments, the air conditioner includes an electrical heating device configured to heat an outdoor heat exchanger of the air conditioner; the method comprises the following steps: obtaining a first outlet temperature of the outdoor unit coil; determining whether the air conditioner has a frosting tendency according to the first outlet temperature of the coil pipe of the outdoor unit; in the case of an air conditioner having a tendency to frost, the electric heating device is controlled to operate for heating.

Optionally, the determining whether the air conditioner has a frosting tendency according to the first outlet temperature of the outdoor coil comprises: determining that the air conditioner has a frosting tendency under the condition that the first outlet temperature of the outdoor unit coil is smaller than a first temperature threshold value; in the case that the first outlet temperature of the outdoor unit coil is greater than or equal to the first temperature threshold, it is determined that the air conditioner does not have a tendency to frost.

Optionally, the determining manner of the first outlet temperature threshold value includes: obtaining the lowest outlet temperature of the coil pipe of the outdoor unit in the second duration of continuous operation of the compressor; a first outlet temperature threshold is determined based on a minimum outlet temperature of the outdoor unit coil.

Optionally, the controlling the electric heating device to operate heating includes: and controlling the electric heating device to periodically start heating, wherein the ratio between the starting time length and the stopping time length of the electric heating device is a first ratio.

Optionally, after the controlling the electric heating device periodically starts heating and the ratio between the start time length and the stop time length of the electric heating device is the first ratio, the method further includes: after a first operation time length, obtaining a first refrigerant temperature of a refrigerant circulation outlet end of the electric heating device; adjusting the ratio between the starting time and the stopping time according to the temperature of the first refrigerant; and controlling the air conditioner to periodically start heating according to the adjusted ratio.

Optionally, adjusting the ratio between the start time and the stop time according to the first refrigerant temperature includes: under the condition that the temperature of the first refrigerant is less than or equal to a second temperature threshold value, determining the ratio between the starting time length and the stopping time length as a second ratio; wherein the second ratio is greater than the first ratio.

Optionally, the determining manner of the second temperature threshold includes: obtaining a current dew point temperature; a second temperature threshold is determined based on the current dew point temperature.

In some embodiments, the apparatus includes a processor and a memory storing program instructions configured to perform the above-described method for controlling an air conditioner when the program instructions are executed.

In some embodiments, the air conditioner includes an electrical heating device configured to heat an outdoor heat exchanger of the air conditioner, further comprising: an air conditioner body; the device for controlling the air conditioner is arranged on the air conditioner body.

In some embodiments, the storage medium stores program instructions that, when executed, perform the method for controlling an air conditioner described above.

The method, the device, the air conditioner and the storage medium for controlling the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:

and detecting the outlet temperature of the coil pipe of the outdoor unit of the air conditioner, and judging whether the air conditioner has frosting tendency or not according to the outlet temperature of the coil pipe of the outdoor unit. If frosting tends to occur, the electric heating device is immediately started to heat the outdoor heat exchanger, so that frosting of the outdoor heat exchanger is avoided. Therefore, the frosting condition of the outdoor heat exchanger is monitored, and frosting prevention in the heating process is realized, so that the influence of frosting in the heating process is avoided.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

fig. 1 is a schematic view of a method for controlling an air conditioner provided in an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

FIG. 5 is a schematic view of an apparatus for controlling an air conditioner provided in an embodiment of the present disclosure;

fig. 6 is a schematic view of an air conditioner according to an embodiment of the present disclosure.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The term "plurality" means two or more, unless otherwise indicated.

In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.

Embodiments of the present disclosure provide an air conditioner including an electric heating device configured to heat an outdoor heat exchanger of the air conditioner.

As shown in conjunction with fig. 1, an embodiment of the present disclosure provides a method for controlling an air conditioner, including:

s101, the processor obtains a first outlet temperature of the coil of the outdoor unit.

Here, the temperature detection may be performed by a temperature sensor provided at the outlet of the outdoor unit coil to obtain the first outlet temperature. The temperature sensor may be provided in one or more.

S102, the processor determines whether the air conditioner has frosting tendency according to the first outlet temperature of the coil pipe of the outdoor unit.

And S103, when the air conditioner has frosting tendency, the processor controls the electric heating device to operate and heat.

By adopting the method for controlling the air conditioner provided by the embodiment of the disclosure, the outlet temperature of the coil pipe of the outdoor unit of the air conditioner is detected, and whether the air conditioner has frosting tendency is judged according to the outlet temperature of the coil pipe of the outdoor unit. If frosting tends to occur, the electric heating device is immediately started to heat the outdoor heat exchanger, so that frosting of the outdoor heat exchanger is avoided. Therefore, the frosting condition of the outdoor heat exchanger is monitored, and frosting prevention in the heating process is realized, so that the influence of frosting in the heating process is avoided.

Optionally, the processor obtaining the first outlet temperature of the outdoor unit coil includes: after the compressor is continuously operated for a first period of time, the processor obtains an outlet temperature of the outdoor unit coil as a first outlet temperature. Therefore, the condition that the temperature of the coil pipe of the outdoor unit is unstable when the compressor is started to run can be avoided, the accuracy of the first outlet temperature is improved, and the accuracy of the frosting tendency judging process and the accuracy of the subsequent electric heating control process are improved.

Optionally, the first duration ranges from 5 minutes to 15 minutes. The preferred value is 10 minutes. Therefore, the temperature detection can be avoided when the air conditioner starts heating, and frosting caused by too long running time can be avoided.

Optionally, the determining manner of the first time length further includes: the processor determines based on the current outdoor temperature. The lower the outdoor temperature, the shorter the first duration. In this way, it is considered that frosting is more likely to occur in the case where the outdoor temperature is low, and therefore, properly reducing the first time period can avoid the occurrence of the situation where frosting has occurred before the temperature detection is performed.

Optionally, the processor determining whether the air conditioner has a tendency to frost based on the first outlet temperature of the outdoor coil comprises: the processor determining that the air conditioner has a tendency to frost if the first outlet temperature of the outdoor unit coil is less than a first temperature threshold; the processor determines that the air conditioner has no tendency to frost if the first outlet temperature of the outdoor unit coil is greater than or equal to a first temperature threshold. The specific logic is as in fig. 2.

As shown in connection with fig. 2, an embodiment of the present disclosure provides another method for controlling an air conditioner, including:

s201, the processor obtains a first outlet temperature of the outdoor unit coil.

S202, the processor judges that the first outlet temperature of the coil of the outdoor unit is smaller than a first temperature threshold.

If yes, step S203 and step S204 are executed.

S203, the processor determines that the air conditioner has a tendency to frost.

S204, the processor controls the electric heating device to operate for heating.

If not, then step S205 is performed.

S205, the processor determines that the air conditioner does not have a frosting tendency.

Optionally, the determining manner of the first temperature threshold includes: the processor obtains a minimum outlet temperature of the outdoor unit coil during a second period of continuous operation of the compressor, and determines a first outlet temperature threshold based on the minimum outlet temperature of the outdoor unit coil. Wherein the second duration is less than or equal to the first duration. That is, during the second period, the outlet temperature of the outdoor unit coil is detected, and the lowest outlet temperature is determined and recorded as the lowest outlet temperature.

Optionally, the second duration ranges from 5 minutes to 15 minutes. Preferably, the second time period takes a value of 10 minutes.

Optionally, the processor determining the first outlet temperature threshold based on the lowest outlet temperature of the outdoor unit coil includes: the processor determines the first temperature threshold as a sum of a lowest outlet temperature of the outdoor unit coil temperature and the first temperature. Wherein the first temperature is negative. For example, the first temperature is-2 ℃, and the first temperature threshold is the lowest temperature of the outdoor coil minus 2 ℃.

Optionally, the processor controls the electric heating device to operate heating, including: the processor controls the electric heating device to periodically start heating, and the ratio between the starting time length and the stopping time length of the electric heating device is a first ratio.

Alternatively, the first ratio is 1. Namely, the proportional relation between the starting time length and the stopping time length is 1:1. more specifically, the start time period and the stop time period are each 10 seconds.

As shown in connection with fig. 3, an embodiment of the present disclosure provides another method for controlling an air conditioner, including:

s301, the processor obtains a first outlet temperature of the outdoor unit coil.

S302, the processor determines whether the air conditioner has frosting tendency according to the first outlet temperature of the coil pipe of the outdoor unit.

S303, in the case that the air conditioner has a frosting tendency, the processor controls the electric heating device to periodically start heating, and the ratio between the starting time and the stopping time of the electric heating device is a first ratio.

S304, after the first operation time, the processor obtains a first refrigerant temperature of a refrigerant flowing outlet end of the electric heating device. Specifically, the temperature of the refrigerant heated by the electric heating device is detected, and the temperature is used as the first refrigerant temperature.

The first operation duration may be determined according to a start duration and a stop duration. Specifically, the sum of the single start time length and the stop time length is a period, and the first operation time length is determined to be a preset multiple of the period. For example, the first run length is 3 times the period. After the operation is started and stopped for 3 times, the processor obtains the first refrigerant temperature of the refrigerant flowing outlet end of the electric heating device.

S305, the processor adjusts the ratio between the starting time and the stopping time according to the temperature of the first refrigerant.

And S306, the processor controls the air conditioner to periodically start heating according to the adjusted ratio.

Therefore, in the operation process of the electric heating device, the operation of the electric heating device is regulated according to the temperature of the refrigerant flowing through the electric heating device, so that the electric heating device meets the actual operation requirement, and the frosting prevention effect is optimized.

Optionally, the processor adjusts a ratio between the start time and the stop time according to the first refrigerant temperature, including: and under the condition that the temperature of the first refrigerant is less than or equal to a second temperature threshold value, the processor determines the ratio between the starting time period and the stopping time period to be a second ratio. Wherein the second ratio is greater than the first ratio. Namely, under the condition that the temperature of the first refrigerant is lower, the heating degree of the electric heating device is lower, at the moment, the ratio between the starting time and the stopping time is increased, and the starting time of heating is increased, so that frosting is avoided.

Wherein the second ratio is for example 2. Namely, the proportional relation between the starting time length and the stopping time length is 2:1. more specifically, the start time period may be 20 seconds and the stop time period 10 seconds.

Optionally, the determining manner of the second temperature threshold value includes: the processor obtains a current dew point temperature and determines a second temperature threshold based on the current dew point temperature. Therefore, the specific value of the second temperature threshold is determined according to the actual environment of the current work, so that the accuracy of the second temperature threshold is improved, and the accuracy of judgment and subsequent control processes is improved.

Optionally, the processor determining the second temperature threshold from the current dew point temperature comprises: the processor determines the second temperature threshold as a sum of the current dew point temperature and the second temperature. Wherein the second temperature is negative. For example, -2 ℃. I.e. the second temperature threshold is the current dew point temperature minus 2 ℃.

Wherein the dew point temperature is determined based on the temperature and relative humidity of the current environment.

Optionally, in the case that the ratio between the start time period and the stop time period is determined to be the second ratio, the processor controls the air conditioner to periodically operate to start and stop according to the adjusted ratio, and then the method further includes: after the second operation time, the processor obtains a second refrigerant temperature of the refrigerant circulation outlet end of the electric heating device. And under the condition that the temperature of the second refrigerant is less than or equal to a third temperature threshold value, the processor controls the electric heating device to stop running. On the basis that the time proportion of the starting time and the stopping time is adjusted, if the temperature of the heated refrigerant is still lower after the second operation time, the fact that the operation of the electric heating device cannot realize effective frosting prevention in the current situation is indicated. Therefore, the electric heating device is turned off to avoid resource waste caused by unnecessary operation of the electric heating device.

Meanwhile, the air conditioner is controlled to start a defrosting mode, and defrosting is started. Thereby avoiding further deterioration of frosting condition and having more serious influence on indoor heating.

Optionally, the second operation duration is determined according to the adjusted start duration and stop duration. One period is the sum of the start time and the stop time, and the second operation time is determined to be an integer multiple of the period. For example, the second time period is three times the period.

As shown in connection with fig. 4, an embodiment of the present disclosure provides another method for controlling an air conditioner, including:

s401, after the compressor continuously operates for a first time, the processor obtains the outlet temperature of the coil of the outdoor unit as a first outlet temperature.

S402, the processor judges that the first outlet temperature of the coil of the outdoor unit is smaller than a first temperature threshold.

If yes, go to step S403 to step S409; if not, then step S410 is performed.

S403, the processor determines that the air conditioner has a tendency to frost.

S404, the processor controls the electric heating device to periodically start heating, and the ratio between the starting time length and the stopping time length of the electric heating device is a first ratio.

S405, after a first operation time, the processor obtains a first refrigerant temperature of a refrigerant flowing outlet end of the electric heating device.

S406, the processor adjusts the ratio between the starting time and the stopping time according to the temperature of the first refrigerant.

And S407, the processor controls the air conditioner to periodically start heating according to the adjusted ratio.

And S408, after the second operation time, the processor obtains a second refrigerant temperature of the refrigerant flowing outlet end of the electric heating device.

And S409, under the condition that the temperature of the second refrigerant is less than or equal to a third temperature threshold value, the processor controls the electric heating device to stop running and controls the air conditioner to enter a defrosting mode.

S410, the processor determines that the air conditioner does not have a frosting tendency.

The above method is further described herein by way of example: after the compressor was continuously operated for 10 minutes, the outlet temperature of the indoor coil was detected to obtain a first outlet temperature. The lowest outlet temperature of the indoor coil within 10 minutes of compressor operation was taken as the first temperature threshold. If the first outlet temperature is lower than the first temperature threshold, the frosting tendency is shown, and the electric heating device needs to be started to operate for heating. If the first outlet temperature is greater than or equal to the first temperature threshold, the air conditioner is indicated to have no frosting trend at present, and the air conditioner can normally operate. In the case of a frosting tendency, the electric heating device is controlled to be periodically started and shut down. The electric heating device is first controlled to operate in a manner of being turned on for 10 seconds and turned off for 10 seconds. After 1 minute, the temperature of the refrigerant at the refrigerant flowing outlet end of the electric heating device is detected, and the first refrigerant temperature is obtained. The dew point temperature in the current environment is obtained, and a second temperature threshold is determined according to the dew point temperature. If the first refrigerant temperature is detected to be lower than the second temperature threshold, the operation of the electric heating device is adjusted to be started for 20 seconds and stopped for 10 seconds. After the operation is performed for 90 seconds in the mode, the temperature of the refrigerant at the refrigerant flowing outlet end of the electric heating device is detected, and the second refrigerant temperature is obtained. A dew point temperature in the current environment is obtained and a third temperature threshold is determined based on the dew point temperature. If the temperature of the second refrigerant is lower than the third temperature threshold, the operation of the electric heating process at the moment cannot prevent the outdoor heat exchanger from frosting, the electric heating device is controlled to stop operation at the moment, the defrosting process is started, and the outdoor unit is defrosted in time.

As shown in connection with fig. 5, an embodiment of the present disclosure provides an apparatus 200 for controlling an air conditioner, including a processor (processor) 50 and a memory (memory) 51. Optionally, the apparatus may also include a communication interface (Communication Interface) 52 and a bus 53. The processor 50, the communication interface 52, and the memory 51 may communicate with each other via a bus 53. Communication interface 52 may be used for information transfer. The processor 50 may call logic instructions in the memory 51 to perform the method for controlling an air conditioner of the above-described embodiment.

Further, the logic instructions in the memory 51 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product.

The memory 51 is a computer readable storage medium that can be used to store a software program, a computer executable program, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 50 executes functional applications and data processing by executing program instructions/modules stored in the memory 51, i.e., implements the method for controlling an air conditioner in the above-described embodiment.

The memory 51 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created according to the use of the terminal device, etc. In addition, the memory 51 may include a high-speed random access memory, and may also include a nonvolatile memory.

As shown in conjunction with fig. 6, an embodiment of the present disclosure provides an air conditioner 100, including: an air conditioner body, and the above-described apparatus 200 for controlling an air conditioner. The device 200 for controlling an air conditioner is installed to a product body. The mounting relationships described herein are not limited to placement within a product, but include mounting connections to other components of a product, including but not limited to physical, electrical, or signal transmission connections, etc. Those skilled in the art will appreciate that the apparatus 200 for controlling an air conditioner may be adapted to a viable product body, thereby achieving other viable embodiments.

Embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described method for controlling an air conditioner.

The computer readable storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.

Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this disclosure is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in the present disclosure, the terms "comprises," "comprising," and/or variations thereof, mean that the recited features, integers, steps, operations, elements, and/or components are present, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.

Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.

In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown 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 units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims (10)

1. A method for controlling an air conditioner, the air conditioner comprising an electrical heating device configured to heat an outdoor heat exchanger of the air conditioner; characterized in that the method comprises:

obtaining a first outlet temperature of the outdoor unit coil;

determining whether the air conditioner has a frosting tendency according to the first outlet temperature of the coil pipe of the outdoor unit;

in the case of an air conditioner having a tendency to frost, the electric heating device is controlled to operate for heating.

2. The method of claim 1, wherein determining whether the air conditioner has a tendency to frost based on the first outlet temperature of the outdoor coil comprises:

determining that the air conditioner has a frosting tendency under the condition that the first outlet temperature of the outdoor unit coil is smaller than a first temperature threshold value;

in the case that the first outlet temperature of the outdoor unit coil is greater than or equal to the first temperature threshold, it is determined that the air conditioner does not have a tendency to frost.

3. The method of claim 2, wherein the first outlet temperature threshold is determined in a manner comprising:

obtaining the lowest outlet temperature of the coil pipe of the outdoor unit in the second duration of continuous operation of the compressor;

a first outlet temperature threshold is determined based on a minimum outlet temperature of the outdoor unit coil.

4. A method according to any one of claims 1 to 3, wherein said controlling the operation of the electric heating device to heat comprises:

and controlling the electric heating device to periodically start heating, wherein the ratio between the starting time length and the stopping time length of the electric heating device is a first ratio.

5. The method of claim 4, wherein the controlling the electric heating device periodically starts heating, and wherein after the ratio between the start time period and the stop time period of the electric heating device is the first ratio, further comprising:

after a first operation time length, obtaining a first refrigerant temperature of a refrigerant circulation outlet end of the electric heating device;

adjusting the ratio between the starting time and the stopping time according to the temperature of the first refrigerant;

and controlling the air conditioner to periodically start heating according to the adjusted ratio.

6. The method of claim 5, wherein adjusting the ratio between the start time period and the stop time period according to the first refrigerant temperature comprises:

under the condition that the temperature of the first refrigerant is less than or equal to a second temperature threshold value, determining the ratio between the starting time length and the stopping time length as a second ratio;

wherein the second ratio is greater than the first ratio.

7. The method of claim 6, wherein the second temperature threshold is determined by:

obtaining a current dew point temperature;

a second temperature threshold is determined based on the current dew point temperature.

8. An apparatus for controlling an air conditioner comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for controlling an air conditioner according to any one of claims 1 to 7 when the program instructions are executed.

9. An air conditioner comprising an electric heating device configured to heat an outdoor heat exchanger of the air conditioner, characterized by further comprising:

an air conditioner body;

the apparatus for controlling an air conditioner as claimed in claim 8, mounted to the air conditioner body.

10. A storage medium storing program instructions which, when executed, perform the method for controlling an air conditioner according to any one of claims 1 to 7.