CN113685970A

CN113685970A - Method and device for controlling defrosting of air conditioner and air conditioner

Info

Publication number: CN113685970A
Application number: CN202110846341.0A
Authority: CN
Inventors: 程惠鹏; 肖克强; 宋力钊
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd; Chongqing Haier Air Conditioner Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd; Chongqing Haier Air Conditioner Co Ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2021-11-23
Anticipated expiration: 2041-07-26
Also published as: CN113685970B

Abstract

The application relates to the technical field of intelligent household appliances, and discloses a method for controlling defrosting of an air conditioner, which comprises the following steps: responding to an air conditioner defrosting instruction; determining the target rotating speed of an indoor fan and the target state of an indoor unit guide plate according to the outdoor temperature; controlling the indoor fan to operate according to the target rotating speed, and adjusting a guide plate of the indoor unit to the target state; the target state comprises a closing state or a raising state. In the defrosting process, the indoor fan is ensured to run at the set rotating speed, and the guide plate is adjusted to the set state, so that the convection of the indoor unit evaporator is promoted, the heat exchange of the indoor unit evaporator is improved, the exhaust temperature of the compressor is further improved, and the melting speed of frost on the outdoor unit is accelerated. The application also discloses a device and air conditioner for controlling the defrosting of air conditioner.

Description

Method and device for controlling defrosting of air conditioner and air conditioner

Technical Field

The application relates to the technical field of intelligent household appliance control, in particular to a method and a device for controlling defrosting of an air conditioner and the air conditioner.

Background

At present, when an air conditioner operates in a heating mode at low outdoor temperature, a periodic defrosting process occurs. During defrosting, the indoor fan and the outdoor fan need to be turned off, and meanwhile, the air conditioner runs a refrigeration mode to completely melt frost of the outdoor unit. Therefore, during defrosting, the indoor temperature may drop, resulting in poor user experience.

In the related art, the defrosting time is shortened by controlling the operation frequency of the compressor, the opening degree of the electronic expansion valve, and the like.

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:

in a severe cold area or an area with heavy wind and snow, the related art has slight improvement on defrosting time.

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 nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a method and a device for controlling defrosting of an air conditioner and the air conditioner, so as to effectively improve defrosting time and shorten defrosting time.

In some embodiments, the method comprises: responding to an air conditioner defrosting instruction; determining the target rotating speed of an indoor fan and the target state of an indoor unit guide plate according to the outdoor temperature; controlling the indoor fan to operate according to the target rotating speed, and adjusting the guide plate of the indoor unit to the target state; the target state comprises a closing state or a raising state.

In some embodiments, the apparatus comprises: a processor and a memory storing program instructions, the processor being configured to, upon execution of the program instructions, perform the above-described method for controlling defrosting of an air conditioner.

In some embodiments, the air conditioner includes: the device for controlling defrosting of the air conditioner is described above.

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

in the embodiment of the disclosure, when the air conditioner operates a defrosting instruction, the target rotating speed of the indoor fan is determined according to the outdoor temperature; meanwhile, determining the state of the guide plate of the indoor unit according to the outdoor temperature; controlling the indoor fan to operate according to the target rotating speed, and adjusting the guide plate of the indoor unit to the target state; the target state comprises a closing state or a raising state; therefore, in the defrosting process, the indoor fan is ensured to operate at the set rotating speed, and the guide plate is adjusted to the set state, so that the convection of the indoor unit evaporator is promoted, the heat exchange of the indoor unit evaporator is improved, the exhaust temperature of the compressor is further improved, and the melting speed of frost on the outdoor unit is accelerated.

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 in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

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

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

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

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

fig. 5 is a schematic diagram of an apparatus for controlling defrosting of an air conditioner according to an embodiment of the present disclosure.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. 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 be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

The term "plurality" means two or more unless otherwise specified.

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

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.

Referring to fig. 1, an embodiment of the present disclosure provides a method for controlling defrosting of an air conditioner, including:

and S01, responding to the defrosting command of the air conditioner by the air conditioner processor.

In the embodiment of the disclosure, when the air conditioner processor determines that the air conditioner needs to operate the defrosting mode, the air conditioner processor may issue an instruction to control the air conditioner to execute the instruction, and the air conditioner operates the defrosting mode. Or, in the air-conditioning heating mode, a preset condition may be set, and in the case that the air-conditioner meets the preset condition, the air-conditioning processor issues a defrosting instruction and responds to the air-conditioning defrosting instruction to control the air-conditioner to operate the defrosting mode. Here, the preset condition may be that the outdoor temperature is lower than a temperature threshold, or that the thickness of frost on the outdoor unit exceeds a thickness threshold is detected; for example, the temperature threshold may be-20 degrees celsius. Therefore, the air conditioner can be accurately controlled to respond to the defrosting instruction.

S02, the air conditioner processor determines the target rotating speed of the indoor fan and the target state of the indoor unit guide plate according to the outdoor temperature; the target state comprises a closing state or a raising state.

In the embodiment of the disclosure, after the air conditioner operates in the defrosting mode, the outdoor temperature is acquired. Here, a temperature sensor may be provided on the outdoor unit of the air conditioner for acquiring the temperature of the outdoor environment; or, the air conditioner processor may communicate with the smart appliance to obtain the current temperature of the outdoor environment, for example, the air conditioner may communicate with the smart speaker in voice to obtain the current weather information, and then obtain the current temperature of the outdoor environment.

And determining the target rotating speed of the indoor fan and the target state of the guide plate of the indoor unit according to the outdoor temperature. Here, the corresponding relationship between the outdoor temperature and the target rotation speed of the indoor fan may be preset, and the target rotation speed corresponding to the current outdoor temperature may be queried according to the preset corresponding relationship, so as to determine the target rotation speed of the indoor fan. For example; a temperature threshold, a first temperature threshold and a second temperature threshold may be set; when the outdoor temperature is higher than a first temperature threshold value, the target rotating speed of the indoor fan is a first rotating speed; when the outdoor temperature is less than or equal to the first temperature threshold and greater than the second temperature threshold, the target rotating speed of the indoor fan is a second rotating speed; and when the outdoor temperature is less than or equal to the second temperature threshold value, the target rotating speed of the indoor fan is a third rotating speed. The corresponding relation between the outdoor temperature and the target state of the indoor unit guide plate can be set; for example: when the outdoor temperature is less than or equal to the set temperature, the target state of the guide plate of the indoor unit is a closed state; when the outdoor temperature is higher than the set temperature, the target state of the guide plate of the indoor unit is a raising state, and the raising angle of the guide plate of the indoor unit can be in a linear relation with the outdoor temperature, namely the higher the outdoor temperature is, the smaller the raising angle is. Like this, can rationally set up the target rotational speed of indoor set and the target state of indoor set baffle according to outdoor ambient temperature, improve the heat exchange efficiency of evaporimeter, and then improve the efficiency of air conditioner defrosting, simultaneously, can avoid cold wind direct-blowing user, reduce user's discomfort.

And S03, the air conditioner processor controls the indoor fan to operate according to the target rotating speed and adjusts the indoor unit guide plate to the target state.

In the embodiment of the disclosure, after the target rotating speed of the indoor fan and the target state of the guide plate are determined, the air conditioner is controlled to operate under the parameters. Therefore, the frost of the outdoor unit can be melted and removed more quickly.

By adopting the method for controlling the defrosting of the air conditioner, the indoor fan can be ensured to run at the set rotating speed and the guide plate is adjusted to the set state in the defrosting process, so that the convection of the evaporator of the indoor unit is promoted, the heat exchange of the indoor evaporator is improved, the exhaust temperature of the compressor is further improved, and the defrosting speed of the outdoor unit is accelerated.

Optionally, in step S02, the determining, by the air conditioning processor, the target rotation speed of the indoor fan according to the outdoor temperature includes:

determining a preset temperature interval where the outdoor temperature is located according to the outdoor temperature; and determining the target rotating speed according to the corresponding relation between the preset temperature interval and the target rotating speed of the indoor fan.

In the embodiment of the disclosure, the outdoor temperature is divided into a plurality of temperature intervals in advance, and each temperature interval corresponds to different target rotating speeds; and after the current outdoor temperature is obtained, searching a temperature interval where the current outdoor temperature is located, and determining a corresponding target rotating speed according to the temperature interval. As shown in table 1, the outdoor temperature may be divided into five temperature intervals, each temperature interval corresponding to a different rotation speed; wherein A, B, C, D, E respectively represents different target rotating speeds, and the value range is 350 r/min-1200 r/min.

TABLE 1 relationship between target rotation speed of indoor fan and outdoor temperature

Range of outdoor temperature interval	Target rotating speed of indoor fan
		0℃～5℃	A
-5℃～0℃	B
		-10℃～-5℃	C
-15℃～-10℃	D
		＜-15℃	E

Therefore, the target rotating speed of the indoor fan can be better determined according to the outdoor temperature, the indoor evaporator can accelerate heat exchange and absorb heat, so that appropriate heat is provided for defrosting of the outdoor unit, and defrosting time is shortened.

Optionally, in step S02, the air conditioner processor determines the corresponding relationship between the preset temperature interval and the target rotation speed of the indoor fan by: the lower the outdoor temperature represented by the preset temperature interval is, the higher the target rotation speed of the indoor fan is.

In the embodiment of the present disclosure, the lower the outdoor temperature is, the higher the target rotation speed of the indoor fan is. For example, when the outdoor temperature is 2 ℃, the target rotating speed can be 380 r/min; when the outdoor temperature is-2 ℃, the target rotating speed can be 450 r/min. In the defrosting process of the air conditioner, the lower the outdoor temperature is, the more heat is needed for defrosting of the outdoor unit, so that the target rotating speed of the indoor unit is higher, and therefore, the heat exchange of the indoor evaporator is accelerated, and more heat is provided for the outdoor unit to defrost.

In some embodiments, the indoor fan may rotate in a reverse direction or alternatively in a forward direction and a reverse direction at a target rotation speed, which facilitates the flow of air conditioners inside the indoor unit, improves heat exchange efficiency, and reduces defrosting time.

Optionally, in step S02, the air conditioner processor determines a target state of the indoor unit guide plate according to the outdoor temperature, including:

determining that the guide plate of the indoor unit is in a closed state under the condition that the outdoor temperature is less than the temperature threshold value;

and determining that the guide plate of the indoor unit is in the upward state under the condition that the outdoor temperature is greater than or equal to the temperature threshold value.

In the embodiment of the disclosure, a temperature threshold value is set, and when the outdoor temperature is less than the temperature threshold value, the indoor guide plate is determined to be closed; therefore, heat can be accumulated in the indoor unit, the evaporator can exchange heat more effectively, and defrosting efficiency is improved. When the outdoor temperature is greater than or equal to the temperature threshold value, determining that the guide plate of the indoor unit raises; under the condition, because the outdoor temperature is higher, the heat required by defrosting is relatively less, the guide plate of the indoor unit can be opened and raised, one part of the heat in the indoor unit is used for heat exchange of the evaporator, and the other part of the heat is used for providing indoor space, so that cold air blowing to a user can be avoided while defrosting.

Referring to fig. 2, another method for controlling defrosting of an air conditioner according to an embodiment of the present disclosure includes:

S14, the air conditioner processor obtains the exhaust temperature of the compressor; and correcting the target rotating speed of the indoor fan according to the exhaust temperature.

In the embodiment of the disclosure, the acquisition of the exhaust temperature may be to set a temperature sensor at an exhaust port of the air conditioner compressor, collect the exhaust temperature of the compressor, and transmit the collected temperature to the air conditioner processor. During defrosting, the air conditioning processor may correct the target speed of the indoor fan based on the discharge temperature of the compressor. For example, when the exhaust temperature is high, the rotation speed may be reduced; when the exhaust temperature is lower, the rotating speed can be kept unchanged; therefore, the problems of shutdown, compressor reliability and the like caused by too large system load due to overhigh exhaust temperature can be avoided, and defrosting is further influenced.

Alternatively, step S14, modifying the target rotation speed of the indoor fan according to the exhaust temperature includes:

maintaining the target rotation speed in the case where the exhaust gas temperature is less than or equal to the first threshold value; reducing the target rotating speed according to a preset speed under the condition that the exhaust temperature is greater than a first threshold and less than or equal to a second threshold; and under the condition that the exhaust temperature is greater than a second threshold value, controlling the indoor fan to stop.

In the embodiment of the present disclosure, the target rotation speed is corrected according to the magnitude relation between the exhaust temperature and the threshold value. When the exhaust temperature is lower, the target rotating speed of the indoor unit can be kept; when the exhaust temperature is high, the target rotating speed can be reduced according to a preset speed; here, the preset rate may be a 10r/min decrease every 10 seconds, or a 10r/min decrease every 20 seconds, or the like; when the exhaust temperature is too high, the indoor fan can be controlled to stop. Wherein, the value range of the first threshold value can be 60-95 ℃, 65 ℃, 70 ℃ and the like; the second threshold value can be 105-110 deg.C, 106 deg.C, 108 deg.C, etc.

Alternatively, in step S14, when the exhaust temperature is greater than the first threshold and equal to or less than the second threshold, decreasing the target rotation speed at a preset rate includes:

reducing the target rotation speed at a first rate when the exhaust temperature is greater than a first threshold value and less than or equal to an intermediate threshold value; reducing the target rotating speed according to a second rate under the condition that the exhaust temperature is greater than the intermediate threshold and less than or equal to a second threshold; wherein the first rate is less than the second rate.

In the embodiment of the disclosure, when the exhaust temperature is in the interval range between the first threshold and the second threshold, the speed of the indoor fan can be controlled according to the exhaust temperature. Specifically, the indoor fan may be controlled to slow down at a slower rate when the exhaust temperature approaches the first threshold; and when the exhaust temperature is close to the second threshold value, controlling the indoor fan to reduce the speed at a faster speed. Here, the intermediate threshold is a value between the first threshold and the second threshold, for example: 80 ℃, 90 ℃ and the like; the first rate may be a 10r/min reduction every 10 seconds and the second rate may be a 10r/min reduction every 5 seconds. Therefore, the rotating speed of the indoor fan is dynamically adjusted according to the exhaust temperature of the compressor, and the stability of system operation is guaranteed when defrosting is accelerated.

Referring to fig. 3, another method for controlling defrosting of an air conditioner according to an embodiment of the present disclosure includes:

s15, the air conditioner processor obtains the temperature at the outlet of the condenser of the outdoor unit in the heating mode; and under the condition that the temperature at the outlet of the condenser of the outdoor unit is continuously lower than the preset temperature, determining that the air conditioner executes a defrosting instruction.

In the embodiment of the disclosure, the air conditioner detects the temperature at the outlet of the condenser of the outdoor unit in the heating mode; here, a temperature sensor may be provided on the copper pipe at the outlet of the condenser of the outdoor unit to detect the temperature at the outlet of the condenser. When the temperature at the outlet of the condenser is continuously lower than the preset temperature, determining that the air conditioner needs defrosting; here, the preset temperature may be-20 ℃, and the continuously lower than the preset temperature means lower than the preset temperature for a certain period of time, and the certain period of time may be 10 minutes or 20 minutes, etc. Therefore, whether the air conditioner needs defrosting can be accurately judged.

Referring to fig. 4, another method for controlling defrosting of an air conditioner according to an embodiment of the present disclosure includes:

And S16, an electric heating device is arranged in the indoor unit, and the air conditioning processor controls the electric heating device to be started when the guide plate of the indoor unit is in a closed state.

In the embodiment of the disclosure, under the condition that the indoor unit is provided with the electric heating device, when the air deflector of the indoor unit is in a closed state, the electric heating device is started; the air deflector of the indoor unit is closed, so that the current outdoor temperature is low, at the moment, in order to improve the heat exchange of the indoor evaporator, the electric heating device can be started to provide heat for the interior of the indoor unit, the exhaust temperature of the compressor is further improved, and the defrosting time is reduced.

The embodiment of the disclosure provides a device for controlling defrosting of an air conditioner, which comprises a response module, a determination module and a control module. The response module is configured to respond to an air conditioner defrosting instruction; the determining module is configured to determine a target rotating speed of the indoor fan and a target state of the indoor unit guide plate according to the outdoor temperature; the target state comprises a closing state or a raising state; the control module is configured to control the indoor fan to operate according to the target rotating speed and adjust the indoor unit guide plate to the target state.

By adopting the device for controlling the defrosting of the air conditioner, the indoor fan is ensured to run at the set rotating speed and the guide plate is adjusted to the set state in the defrosting process, so that the convection of the indoor unit evaporator is promoted, the heat exchange of the indoor evaporator is improved, the exhaust temperature of the compressor is further improved, and the defrosting speed of the outdoor unit is accelerated.

As shown in fig. 5, an embodiment of the present disclosure provides an apparatus for controlling defrosting of an air conditioner, which includes a processor (processor)100 and a memory (memory) 101. Optionally, the apparatus may also include a Communication Interface (Communication Interface)102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via a bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to perform the method for controlling defrosting of an air conditioner of the above-described embodiment.

In addition, the logic instructions in the memory 101 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.

The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes functional applications and data processing by executing program instructions/modules stored in the memory 101, that is, implements the method for controlling defrosting of an air conditioner in the above-described embodiment.

The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.

The embodiment of the disclosure provides an air conditioner, which comprises the device for controlling defrosting of the air conditioner.

The disclosed embodiments provide a storage medium storing computer-executable instructions configured to perform the above-described method for controlling defrosting of an air conditioner.

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

The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable 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 of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "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 application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, 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 an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.

Those of skill in the art would 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 may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely 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, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The flowchart 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 disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims

1. A method for controlling defrosting of an air conditioner, comprising:

responding to an air conditioner defrosting instruction;

determining the target rotating speed of an indoor fan and the target state of an indoor unit guide plate according to the outdoor temperature;

controlling the indoor fan to operate according to the target rotating speed, and adjusting the guide plate of the indoor unit to the target state;

the target state comprises a closing state or a raising state.

2. The method of claim 1, wherein determining a target speed of an indoor fan based on an outdoor temperature comprises:

determining a preset temperature interval where the outdoor temperature is located according to the outdoor temperature;

and determining the target rotating speed according to the corresponding relation between the preset temperature interval and the target rotating speed of the indoor fan.

3. The method according to claim 2, wherein the correspondence between the preset temperature interval and the target rotation speed of the indoor fan is determined by:

the lower the outdoor temperature represented by the preset temperature interval is, the higher the target rotation speed of the indoor fan is.

4. The method of claim 1, wherein the determining the target state of the indoor unit guide plate according to the outdoor temperature comprises:

and determining that the guide plate of the indoor unit is in a lifting state under the condition that the outdoor temperature is greater than or equal to the temperature threshold value.

5. The method of claim 1, wherein after controlling the indoor fan to operate at the target speed, further comprising:

acquiring the exhaust temperature of a compressor;

and correcting the target rotating speed of the indoor fan according to the exhaust temperature.

6. The method of claim 5, wherein the correcting the target speed of the indoor fan based on the discharge temperature comprises:

maintaining the target rotational speed in a case where the exhaust gas temperature is less than or equal to a first threshold value;

reducing the target rotating speed according to a preset speed under the condition that the exhaust temperature is greater than the first threshold and less than or equal to a second threshold;

and controlling the indoor fan to stop under the condition that the exhaust temperature is greater than the second threshold value.

7. The method of any of claims 1 to 6, wherein prior to said responding to an air conditioner defrost command, the method further comprises:

in the heating mode, acquiring the temperature at the outlet of the condenser of the outdoor unit;

and under the condition that the temperature at the outlet of the condenser of the outdoor unit is continuously lower than the preset temperature, determining that the air conditioner executes a defrosting instruction.

8. Method according to any one of claims 1 to 6, characterized in that an electric heating device is provided in the indoor unit; the method further comprises the following steps:

and under the condition that the guide plate of the indoor unit is in a closed state, controlling the electric heating device to be started.

9. An apparatus for controlling defrosting of an air conditioner, comprising a processor and a memory storing program instructions, characterized in that the processor is configured to execute the method for controlling defrosting of an air conditioner according to any one of claims 1 to 8 when executing the program instructions.

10. An air conditioner characterized by comprising the apparatus for controlling defrosting of an air conditioner according to claim 9.