CN112050373A

CN112050373A - Control method and control device for defrosting of air conditioner and air conditioner

Info

Publication number: CN112050373A
Application number: CN201910493887.5A
Authority: CN
Inventors: 许文明; 罗荣邦
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Co Ltd
Priority date: 2019-06-07
Filing date: 2019-06-07
Publication date: 2020-12-08

Abstract

The application relates to a control method and a control device for defrosting of an air conditioner and the air conditioner. The control method comprises the following steps: when the air conditioner meets the frosting temperature condition, determining the frosting accumulated time length according to the indoor environment temperature corresponding to the air conditioner; and controlling the air conditioner to enter a defrosting mode under the condition that the frosting accumulated time meets a preset time condition. The application provides a method for determining the accumulated frosting time based on the indoor environment temperature of an air conditioner and then carrying out defrosting judgment control according to the time condition, which can more accurately control the air conditioner to trigger to enter a defrosting mode and reduce the problems of false triggering, frequent triggering and the like of a defrosting process in the related technology.

Description

Control method and control device for defrosting of air conditioner and air conditioner

Technical Field

The present application relates to the field of air conditioner defrosting technologies, and for example, to a control method and a control device for air conditioner defrosting, and an air conditioner.

Background

Along with the improvement of living standard of people, air conditioning equipment has also gone into thousands of households, the use of domestic air conditioners and central air conditioners is more and more common, the requirement of users on the comfort level of the air conditioners is more and more high, the problems existing in the use process of the air conditioners are also gradually exposed, and one of the problems is the problem that an outdoor unit of the air conditioner is frosted and frozen when the air conditioner operates in severe cold climate. When the air conditioner operates in a low-temperature area or an area with large wind and snow, the condensed water flow on the outer surface of the condenser of the outdoor unit can drop on the base plate, the condenser and the base plate of the air conditioner can be frozen under the condition that the air conditioner operates for a long time, the condensed ice layer on the outdoor unit can obstruct the heat exchange between the internal refrigerant and the outdoor environment, the refrigerating efficiency of the air conditioner is reduced, in order to ensure the heating effect of the air conditioner, the air conditioner has to operate with increased power, and the extra consumption of electric energy and the use cost of a user are increased.

Therefore, some conventional air conditioners have a defrosting function to solve the problem of frost and ice formation of an outdoor unit of the air conditioner, for example, heating the outdoor unit by a heating device provided in the outdoor unit, or defrosting and melting ice in an outdoor heat exchanger by a high-temperature refrigerant discharged from a compressor. Here, before the air conditioner starts the defrosting function, the air conditioner generally determines whether a temperature condition in which frost is easily condensed has been reached by combining the temperature of the external coil detected by the outdoor sensor with the frost point temperature, and then determines whether the defrosting function is started.

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: the air conditioner generally uses the magnitude of the external environment temperature compared with the frost point temperature as the judgment condition for judging whether the air conditioner needs defrosting; the factors influencing the frosting degree of the outdoor unit of the air conditioner not only comprise external environment factors, but also comprise the influence factors of the self state of the air conditioner; therefore, under the partial conditions that the variation of parameters such as the outer ring temperature and the like before and after the defrosting of the air conditioner is small, the working state of each part of the air conditioner is changed after the defrosting of the air conditioner is finished every time, if the air conditioner is judged and controlled to defrost in the mode, a large error exists between the working state and the actual frosting state of the air conditioner, the problems that the defrosting function is triggered by mistake and triggered frequently are easily caused, and the like, so that the requirement that the defrosting function is triggered by the accurate control of the air conditioner cannot be met.

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 control method and a control device for defrosting of an air conditioner and the air conditioner, so as to solve the technical problems of false triggering, frequent triggering and the like in the related technology of triggering a defrosting function by the air conditioner.

In some embodiments, the control method comprises:

when the air conditioner meets the frosting temperature condition, determining the frosting accumulated time length according to the indoor environment temperature corresponding to the air conditioner;

and controlling the air conditioner to enter a defrosting mode under the condition that the frosting accumulated time meets a preset time condition.

In some embodiments, the control device comprises:

the time length determining module is configured to determine the frosting accumulated time length according to the indoor environment temperature corresponding to the air conditioner when the air conditioner meets the frosting temperature condition;

and the defrosting control module is configured to control the air conditioner to enter a defrosting mode under the condition that the frosting accumulated time length meets a preset time length condition.

In some embodiments, the air conditioner includes the control device described above.

Some technical solutions provided by the embodiments of the present disclosure can achieve the following technical effects:

the control method for defrosting of the air conditioner, provided by the embodiment of the disclosure, can comprehensively carry out whether the air conditioner starts a defrosting mode according to the temperature change condition and the time length condition of the outdoor coil temperature of the air conditioner in the heating working condition, and compared with a control mode of carrying out defrosting judgment based on the outer ring temperature in the related art, the control method for determining the accumulated frosting time length based on the indoor environment temperature of the air conditioner and then carrying out defrosting judgment and control according to the time length condition can more accurately control the air conditioner to trigger into the defrosting mode, and reduce the problems of false triggering, frequent triggering and the like of the defrosting process in the related art.

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 flowchart of a control method for defrosting an air conditioner according to an embodiment of the present disclosure;

fig. 2 is a schematic flow chart of a control method for defrosting an air conditioner according to another embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a control device for defrosting an air conditioner according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of an electronic device provided in 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.

Fig. 1 is a schematic flow chart of a control method for defrosting an air conditioner according to an embodiment of the present disclosure.

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

s101, when the air conditioner meets a frosting temperature condition, determining the frosting accumulated time according to the indoor environment temperature corresponding to the air conditioner;

in an alternative embodiment, the preset frosting temperature condition includes: the outdoor coil temperature is less than the set frost point temperature.

Here, in the case where the air conditioner satisfies the preset frosting temperature condition, the temperature of the outdoor unit of the air conditioner is low, frost is gradually condensed on the outdoor unit, and the air conditioner may have a problem of frosting affecting the performance of the air conditioner; and under the condition that the air conditioner does not meet the preset frosting temperature condition, the temperature of the outdoor unit of the air conditioner is higher, and the problem of frosting does not exist on the outdoor unit or the frosting amount is less.

Optionally, the set frost point temperature is determined by: acquiring the outdoor environment temperature of the air conditioner; and calculating according to a dew point calculation formula to obtain a dew point temperature, and taking the dew point temperature as a set frost point temperature.

Here, the dew point temperature can be calculated by the following dew point calculation formula:

Tes＝A*Tai+B；

where Tes is the dew point temperature, A is the coefficient of calculation of the outdoor ambient temperature, Tai is the outdoor ambient temperature, and B is the calculation constant.

Therefore, before step S101 is executed in the embodiment of the present disclosure, the step further includes determining whether the air conditioner satisfies the preset frosting temperature condition in step S101 according to the comparison between the acquired outdoor coil temperature and the determined frost point temperature.

Optionally, the step of determining the accumulated frosting time according to the indoor environment temperature corresponding to the air conditioner in step S101 includes: determining the accumulative rate of the frosting time length according to the indoor environment temperature; and calculating the frosting accumulated time according to the frosting time accumulated rate.

In the embodiment of the disclosure, the frosting time duration accumulation rate is used for representing the frosting unit time duration corresponding to the unit time; here, the unit time is 1 minute, and the frosting unit time length is equal to or not equal to the time length value of 1 minute; for example, when the frosting unit time length is 2 minutes, the frosting time length accumulation rate means that the corresponding frosting unit time length adopted for recording the frosting accumulation time length in the unit time of 1 minute is 2 minutes.

Here, when the air conditioner outdoor unit has a problem of frost formation and condensation, the air conditioner outdoor unit may affect the heating performance of the air conditioner itself, and further may affect the heating effect on the indoor environment, so that the difference of the current indoor environment temperature corresponding to the air conditioner may also reflect the different frost condensation degree and condensation rate of the air conditioner, for example, the lower the temperature of the indoor environment temperature is, the more serious the frost condensation degree of the air conditioner outdoor unit is, the faster the condensation rate is; on the contrary, it indicates that the frost condensation degree of the outdoor unit of the air conditioner is lighter and the condensation rate is slower. Therefore, in the embodiment of the present disclosure, the frosting time duration is calculated according to the frosting time duration accumulation rate determined by the indoor environment temperature of the air conditioner, and then the defrosting determination is performed according to the frosting time duration accumulation rate.

In an alternative embodiment, the cumulative duration may be calculated according to the cumulative rate of frosting duration determined by the indoor ambient temperature and the preset correlation.

In the embodiment of the present disclosure, the frosting accumulated time duration is obtained by accumulating the frosting unit time durations corresponding to a plurality of continuous unit times.

For example, in the period from 0 th minute to 5 th minute, the frosting time period accumulation rate determined in step S101 is such that the frosting unit time period corresponding to the unit time of every 1 minute is 3 minutes, and the frosting time period accumulated in the period from 0 th minute to 5 th minute is 3 × 5-15 minutes;

in the period from 5 th to 10 th minutes, the frosting time length accumulation rate determined in step S101 is that the frosting unit time length corresponding to the unit time of every 1 minute is 2 minutes, and the frosting time length accumulated in the period from 5 th to 10 th minutes is 2 × 5-10 minutes;

the frost formation accumulated time period accumulated in the period from 0 th minute to 10 th minute is 25 minutes +10 minutes.

And S102, controlling the air conditioner to enter a defrosting mode when the frosting accumulated time meets a preset time condition.

In the embodiment of the present disclosure, the preset duration condition includes: the frost accumulation time is greater than or equal to the set time. Alternatively, the set time period is 60 minutes.

When the frosting accumulated time in the step S102 meets the preset time condition, controlling the air conditioner to enter a defrosting mode; and under the condition that the frosting accumulated time in the step S102 does not meet the preset time condition, returning to continue executing the step S101, and keeping the current running state of the air conditioner unchanged.

Here, when the air conditioner determines that the accumulated frosting time period satisfying the preset frosting temperature condition satisfies the preset time period condition, it may be determined that more frost is condensed on the outdoor unit of the air conditioner and the influence on the air conditioning heat operation performance is large, and thus the air conditioner is controlled to enter the defrosting mode to remove the excessive ice on the outdoor unit

Fig. 2 is a flowchart illustrating a control method for defrosting an air conditioner according to another embodiment of the present disclosure.

As shown in fig. 2, an execution flow of the control method for defrosting an air conditioner provided by the embodiment of the present disclosure includes:

s201, when the air conditioner meets a preset frosting temperature condition, acquiring the current indoor environment temperature corresponding to the air conditioner;

in the embodiment of the disclosure, the indoor unit of the air conditioner is provided with a temperature sensor, and the temperature sensor can be used for detecting the real-time temperature of the indoor environment where the indoor unit of the air conditioner is located; step 201, acquiring the real-time temperature of the indoor environment detected by the temperature sensor, and taking the real-time temperature as the current indoor environment temperature;

s202, calling historical data of the indoor environment temperature detected after the air conditioner is started and operated at this time, and determining the maximum value of the indoor environment temperatures in the historical data;

after the air conditioner is started to operate, the temperature sensor detects the real-time temperature of the indoor environment at set detection time intervals, and the real-time temperature is stored as historical data; the historical data comprises a plurality of indoor environment temperatures, and the maximum value of the indoor environment temperatures can be determined through numerical comparison;

s203, calculating the temperature difference between the maximum value of the indoor environment temperature and the current indoor environment temperature;

s204, matching to obtain a frosting time length accumulation rate corresponding to the difference interval based on the difference interval where the temperature difference is located and a preset incidence relation;

in the embodiment of the present disclosure, the correlation is configured to represent a corresponding relationship between one or more difference intervals and the frosting time duration accumulation rate, where the difference interval is positively correlated with the frosting time duration accumulation rate, that is, the more serious the outdoor unit is frosted, the lower the indoor ambient temperature is, and the larger the temperature difference between the indoor ambient temperature and the maximum value is.

Illustratively, table 1 shows a correspondence between an optional difference interval and the cumulative frost formation period rate.

Difference interval (Unit:. degree. C.)	Cumulative rate of frosting duration
		0＜Trmax-Tr≤1	1
1＜Trmax-Tr≤2	2
		2＜Trmax-Tr≤3	3
3＜Trmax-Tr≤4	4

TABLE 1

Wherein, Trmax is the maximum value of the indoor environment temperature, and Tr is the indoor environment temperature; therefore, in the above steps, the air conditioner can find and match the frosting time length accumulation rate of the corresponding difference interval through the table.

S205, accumulating and calculating the frosting accumulated time length;

for example, if the accumulated frosting accumulated time is 15 minutes, the frosting unit time corresponding to 1 minute of the current unit time is 2, the calculation mode in step S205 is 15+2 × 1, and a new frosting accumulated time is 17 minutes;

s206, judging whether the frosting accumulated time length is greater than or equal to the set time length, if so, executing the step S207, otherwise, returning to execute the step S201;

and S207, controlling the air conditioner to enter a defrosting mode.

In the embodiment of the present disclosure, the specific implementation process of the defrosting process executed by the air conditioner does not relate to the innovative point of the present application, and therefore is not described in detail.

In the embodiment of the disclosure, the frosting time duration accumulation rate corresponding to the temperature difference value of the associated indoor environment temperature is determined by using the preset association relationship, and then the frosting time duration for defrosting judgment can be obtained in an accumulated manner, so that the accumulated value of the frosting time duration accumulation matched with the current frosting condition can be flexibly adjusted according to the change of the indoor environment temperature under different working conditions, and the control accuracy of the air conditioner triggered defrosting process is improved.

Fig. 3 is a schematic structural diagram of a control device for defrosting of an air conditioner according to an embodiment of the present disclosure.

As shown in fig. 3, an embodiment of the present disclosure also provides a control device for defrosting of an air conditioner, which is applicable to an air conditioner and enables the air conditioner to perform the control flow shown in the above embodiment; the control device 3 includes:

the time length determining module 31 is configured to determine the frosting accumulated time length according to the indoor environment temperature corresponding to the air conditioner when the air conditioner meets the frosting temperature condition;

and the defrosting control module 32 is configured to control the air conditioner to enter a defrosting mode under the condition that the frost accumulation time meets the preset time condition.

In an alternative embodiment, the duration determination module 31 is configured to:

determining the accumulative rate of the frosting time length according to the indoor environment temperature;

and calculating the frosting accumulated time according to the frosting time accumulated rate.

determining the cumulative rate of the frosting time according to the maximum value of the indoor environment temperature and the indoor environment temperature;

the maximum value of the indoor environment temperature is the maximum value of more than one indoor environment temperature acquired after the air conditioner is started to operate.

matching to obtain frosting unit time length corresponding to the difference interval based on the difference interval where the maximum indoor environment temperature and the temperature difference value of the indoor environment temperature are located and a preset incidence relation;

and the incidence relation is configured to represent the corresponding relation between one or more difference intervals and the frosting time length accumulation rate.

In an alternative embodiment, the preset frosting temperature condition includes: the outdoor coil temperature of the air conditioner is less than the frost point temperature.

In an alternative embodiment, the frost point temperature is a dew point temperature calculated according to a dew point calculation formula according to the outdoor environment temperature of the air conditioner.

The specific execution manner of the control flow executed by the control device to control the air conditioner in the present application may refer to the corresponding part of the foregoing embodiments of the control method, and is not described herein again.

The embodiment of the disclosure also provides an air conditioner, which comprises the control device provided in the previous embodiment.

The embodiment of the present disclosure also provides a computer-readable storage medium storing computer-executable instructions configured to execute the control method for defrosting an air conditioner provided in the above embodiment.

Embodiments of the present disclosure also provide a computer program product comprising a computer program stored on a computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the control method for defrosting an air conditioner provided in the above-described embodiments.

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

An embodiment of the present disclosure further provides an electronic device, a structure of which is shown in fig. 4, where the electronic device includes:

at least one processor (processor)400, one processor 400 being exemplified in fig. 4; and a memory (memory)401, and may further include a Communication Interface 402 and a bus 403. The processor 400, the communication interface 402, and the memory 401 may communicate with each other through a bus 403. Communication interface 402 may be used for information transfer. The processor 400 may call logic instructions in the memory 401 to execute the control method for air conditioner defrosting provided in the above-described embodiment.

In addition, the logic instructions in the memory 401 may be implemented in the form of software functional units and may be stored in a computer readable storage medium when the logic instructions are sold or used as independent products.

The memory 401 is a computer-readable storage medium and can 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 400 executes functional applications and data processing by running software programs, instructions and modules stored in the memory 401, that is, implements the control method for defrosting an air conditioner in the above-described method embodiment.

The memory 401 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. Further, the memory 401 may include a high-speed random access memory, and may also include a nonvolatile memory.

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. The scope of the disclosed embodiments includes the full ambit of the claims, as well as all available equivalents of the claims. As used in this application, although the terms "first," "second," etc. may be used in this application to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, unless the meaning of the description changes, so long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first and second elements are both elements, but may not be the same element. 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 control 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. 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 control method for defrosting of an air conditioner is characterized by comprising the following steps:

2. The control method according to claim 1, wherein the determining the accumulated frosting time period according to the indoor environment temperature corresponding to the air conditioner comprises:

and calculating the frosting accumulated time length according to the frosting time length accumulated rate.

3. The control method according to claim 2, wherein the determining the cumulative frosting time period rate according to the indoor ambient temperature comprises:

determining the accumulative rate of the frosting time length according to the maximum value of the indoor environment temperature and the indoor environment temperature;

the maximum value of the indoor environment temperature is the maximum value of more than one indoor environment temperature acquired after the air conditioner is started up and operated at this time.

4. The control method according to claim 3, wherein the determining the frosting time period accumulation rate according to the indoor environment temperature maximum value and the indoor environment temperature comprises:

matching to obtain a frosting time length accumulation rate corresponding to the difference interval based on the difference interval where the temperature difference between the maximum indoor environment temperature and the indoor environment temperature is located and a preset incidence relation;

wherein the correlation is configured to characterize a correspondence between one or more of the difference intervals and the cumulative frosting duration rate.

5. The control method according to claim 1, wherein the preset frosting temperature condition comprises: the temperature of the outdoor coil of the air conditioner is less than the frost point temperature.

6. The control method according to claim 5, wherein the frost point temperature is a dew point temperature calculated according to a dew point calculation formula according to an outdoor environment temperature in which the air conditioner is located.

7. A control apparatus for defrosting an air conditioner, comprising:

8. The control apparatus of claim 7, wherein the duration determination module is configured to:

9. The control apparatus of claim 8, wherein the duration determination module is configured to:

10. The control apparatus of claim 9, wherein the duration determination module is configured to:

11. An air conditioner characterized by comprising the control device according to any one of claims 7 to 10.