CN111594982A

CN111594982A - Control method and control device for cleaning air conditioner and air conditioner

Info

Publication number: CN111594982A
Application number: CN202010140363.0A
Authority: CN
Inventors: 张心怡; 李阳; 王飞
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Haier Smart Home Co Ltd
Priority date: 2020-03-03
Filing date: 2020-03-03
Publication date: 2020-08-28
Anticipated expiration: 2040-03-03
Also published as: CN111594982B

Abstract

The application relates to the technical field of intelligent household appliances, and discloses a control method for cleaning an air conditioner, which comprises the following steps: controlling the surface temperature of the indoor heat exchanger to be adjusted to a first cleaning temperature according to a cleaning instruction of the air conditioner, and performing a first cleaning process; and after the first cleaning process is finished, controlling the outdoor heat exchanger to enter a defrosting mode according to the outdoor environment temperature, or controlling the indoor heat exchanger to enter a second cleaning process. After the first cleaning process is operated according to the cleaning instruction, the next cleaning process is determined in real time according to the outdoor environment temperature, and the outdoor heat exchanger is defrosted in a defrosting mode, so that the condition that frost layer freezing influences the operation of the whole machine is prevented, and frosting and defrosting cleaning of the outdoor heat exchanger are completed; and the temperature of the indoor heat exchanger is changed under the second cleaning process, so that the air conditioner runs different multi-time self-cleaning processes under different outdoor environment temperatures. The application also discloses a control method for cleaning the air conditioner and the air conditioner.

Description

Control method and control device for cleaning air conditioner and air conditioner

Technical Field

The present disclosure relates to the field of air conditioners, and in particular, to a control method and a control device for cleaning an air conditioner, and an air conditioner.

Background

At present, the cleanness and the health of the home environment are valued by more and more users, and the cleanness of the indoor environment can be greatly influenced by the cleanness degree of an air conditioner serving as common air equipment for adjusting the temperature and the humidity of the indoor environment; from long-term use experience of the air conditioner, in the process of circularly conveying indoor air by the air conditioner, dust, impurities and the like in the indoor environment enter the air conditioner along with airflow, so that more dirt is accumulated in the air conditioner after the air conditioner is used for a long time.

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 is easy to accumulate more dirt in the using process, the outdoor heat exchanger is easy to frost when the air conditioner runs in a cleaning mode of an indoor unit in winter in low-temperature weather, and the outdoor heat exchanger is easy to freeze when a frost layer is thick; the self-cleaning function of the existing air conditioner is usually only operated according to an instruction, and the cleaning mode cannot be selected according to the outdoor environment temperature, so that the air conditioner is poor in intelligence, low in cleaning efficiency and poor in cleaning effect when the cleaning mode is carried out.

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 cleaning an air conditioner and the air conditioner, and aims to solve the technical problem that the self-cleaning function of the air conditioner is poor in operation effect under the influence of outdoor environment temperature due to the fact that a cleaning mode of the air conditioner cannot be selected according to the outdoor environment temperature in the related art.

In some embodiments, a control method for air conditioner cleaning includes: controlling the surface temperature of the indoor heat exchanger to be adjusted to a first cleaning temperature according to a cleaning instruction of the air conditioner, and performing a first cleaning process; and after the first cleaning process is finished, controlling the outdoor heat exchanger to enter a defrosting mode according to the outdoor environment temperature, or controlling the indoor heat exchanger to enter a second cleaning process.

In some embodiments, a control device for air conditioner cleaning includes a processor and a memory storing program instructions, the processor being configured to, upon execution of the program instructions, perform a control method for air conditioner cleaning as shown in some embodiments above.

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

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

according to the control method for cleaning the air conditioner, after the first cleaning process is operated according to the cleaning instruction, the next cleaning process is determined in real time according to the outdoor environment temperature, and the outdoor heat exchanger is defrosted in the defrosting mode, so that not only is the frost layer prevented from freezing to influence the operation of the whole machine, but also the frosting and defrosting cleaning of the outdoor heat exchanger are completed; and the temperature of the indoor heat exchanger is changed under the second cleaning process, so that the air conditioner runs different multi-time self-cleaning processes under different outdoor environment temperatures. The cleaning efficiency of the air conditioner is improved, and the efficient operation of a cleaning mode is guaranteed.

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 control method for cleaning an air conditioner according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of a control device for cleaning an air conditioner according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of another control device for cleaning an air conditioner according to an embodiment of the 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.

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

and step S01, controlling the surface temperature of the indoor heat exchanger to be adjusted to a first cleaning temperature according to the cleaning instruction of the air conditioner, and performing a first cleaning process.

And step S02, after the first cleaning process is finished, controlling the outdoor heat exchanger to enter a defrosting mode according to the outdoor environment temperature, or controlling the indoor heat exchanger to enter a second cleaning process.

Here, the first cleaning process and the second cleaning process are used to describe two self-cleaning methods of the air conditioner, and may be cleaning processes of the same principle or cleaning processes of different principles. For example, the first cleaning process is a high-temperature sterilization process, and the air conditioner is controlled to operate by heating the surface temperature of the indoor heat exchanger to a first cleaning temperature for high-temperature sterilization; during a second cleaning process, controlling the air conditioner to heat the surface of the indoor heat exchanger to a second cleaning temperature for operation, and performing high-temperature sterilization; wherein the first cleaning process and the second cleaning process can be performed alternately. By running the cleaning process at least twice, the cleaning degree of the indoor heat exchanger is improved. For another example, the first cleaning process is a high temperature sterilization cleaning, and the second cleaning process is a rapid cooling sterilization cleaning, wherein the high temperature sterilization uses a higher temperature to kill bacteria, and the rapid cooling sterilization uses a rapid change of temperature from high to low to kill bacteria; the method can effectively reduce microorganisms such as bacteria, mold and the like on the heat exchanger, thereby improving the cleanness degree of the interior of the air conditioner. In this embodiment, the first cleaning process is set as a high-temperature sterilization cleaning process, and the second cleaning process is set as a low-temperature condensation cleaning process, wherein the low-temperature condensation cleaning process is to utilize the temperature to be reduced from the higher temperature in the preamble to the condensation temperature, and then the surface of the heat exchanger forms condensed water for flushing the indoor heat exchanger, thereby improving the cleaning degree of the inside of the air conditioner.

Optionally, the air conditioner is provided with a defrosting module, the defrosting module can be used for obtaining numerical values such as the surface temperature of the outdoor heat exchanger and the outdoor environment temperature, when the outdoor heat exchanger is controlled to enter a defrosting mode according to the outdoor environment temperature, it is indicated that frost with a certain thickness is condensed on the outdoor heat exchanger, and at the moment, the defrosting of the outdoor heat exchanger can be switched.

In some optional embodiments, cleaning options such as "sterilization function" or "sterilization function" are added to the remote controller and the control panel of the air conditioner, and the cleaning options can be used to trigger the operation of the method flow for cleaning the air conditioner in this embodiment; thus, after the user selects the cleaning option, the air conditioner generates a relevant cleaning instruction and responds to the execution.

In still other alternative embodiments, the air conditioner may also generate the related cleaning instruction by detecting a trigger, a timing trigger, or the like, for example, the air conditioner is additionally provided with a microorganism detection device, which may be used to detect the content of one or more specific types of microorganisms, and when the detected content of the microorganisms is higher than a set content threshold, it indicates that the air conditioner has a large number of microorganisms, and the air conditioner generates the related cleaning instruction; still alternatively, the air conditioner has a timing module, which is configured to count the cumulative operating time of the air conditioner, such as the cumulative operating time of the cooling mode or the dehumidifying mode, wherein as the cumulative operating time of the cooling mode or the dehumidifying mode of the air conditioner increases, the more condensed water is condensed inside the air conditioner and the more the number of microorganisms in the humid environment increases, so that the air conditioner may be configured to generate the related cleaning instruction when the cumulative operating time of the air conditioner exceeds the set time threshold.

In still other alternative embodiments, the air conditioner may also be triggered in linkage with the original cleaning function of the air conditioner, for example, after the original cleaning function is selected by a user, a cleaning instruction is generated and the cleaning method flow defined by the original cleaning function is executed before the cleaning flow defined by the original cleaning function is executed, or a cleaning instruction is generated and the cleaning method flow defined by the original cleaning function is executed after the cleaning flow defined by the original cleaning function is executed; that is, after the user selects an original cleaning function, the air conditioner executes two different cleaning processes in sequence, and the cleanliness of the interior of the air conditioner is effectively guaranteed through a double cleaning mode.

For example, the original cleaning function of the air conditioner is a spraying cleaning function, the spraying cleaning function is to spray water onto a heat exchanger of the air conditioner to clean the heat exchanger in a flowing water flushing manner, and then an optional implementation manner is that the cleaning method flow of the present application is operated before the spraying cleaning function is executed, that is, after the spraying cleaning function is selected by a user, the cleaning method flow of the present application is controlled to kill microbes such as bacteria and the like, and then the spraying cleaning function is executed, so that the flowing water can not only further flush dirt such as dust, oil stains and the like, but also flush the killed microbes on the heat exchanger at the same time, and multiple times of efficient cleaning can be realized.

In this embodiment, when step S01 is executed, the air conditioner adjusts the flow direction of the refrigerant in the system to be consistent with the flow direction of the refrigerant in the heating mode, so that the high-temperature refrigerant discharged from the compressor first flows through the indoor heat exchanger, so as to heat the indoor heat exchanger by using the heat of the high-temperature refrigerant, heat the surface temperature of the indoor heat exchanger to the first cleaning temperature, and perform high-temperature sterilization.

Optionally, the first cleaning temperature is in a range of 60 ℃ or higher. Under the condition that the surface of the indoor heat exchanger is at the temperature, microorganisms such as bacteria, mold and the like bred on the surface of the indoor heat exchanger are heated and die gradually, so that the effects of sterilization and disinfection are achieved. In this example, the first cleaning temperature was 65 ℃.

Optionally, the second cleaning process includes: controlling the air conditioner to operate at a second cleaning parameter, and controlling the surface temperature of the indoor heat exchanger to be adjusted to a second cleaning temperature; and acquiring a second cleaning parameter of the second cleaning process according to the outdoor environment temperature.

Optionally, obtaining a second cleaning parameter of the second cleaning process according to the outdoor environment temperature includes: acquiring a corresponding second cleaning parameter from a preset second incidence relation according to the outdoor environment temperature; and the preset second incidence relation comprises a corresponding relation between the outdoor environment temperature and the opening degree of the outer machine throttling device. Optionally, adjusting the opening of the throttling device of the air conditioner according to the outdoor environment temperature includes: acquiring a corresponding opening parameter of the throttling device from a preset first incidence relation according to a temperature interval of the outdoor environment temperature; and controlling the opening of the throttling device according to the opening parameter of the throttling device. When the outdoor environment temperature is lower, the throttling device is adjusted by a lower opening degree, so that the temperature and the pressure of the throttled refrigerant are lower, and the heat exchange efficiency of the refrigerant and the external environment is improved.

Optionally, the air conditioner is preset with a second association relationship between the outdoor ambient temperature and the opening degree of the throttling device, where the second association relationship includes a one-to-one correspondence relationship between the outdoor ambient temperature and the opening degree. Therefore, the opening corresponding to the current outdoor environment temperature can be obtained by searching the incidence relation, and the throttle device is controlled to adjust the air conditioner by taking the opening as a parameter in the second cleaning process. Table 1 shows the correlation between the outdoor ambient temperature and the opening degree of the throttle device in an alternative embodiment.

TABLE 1

Outdoor environment temperature	Tao≥25℃	10℃≤Tao＜25℃	Tao＜5℃
				Opening degree of first cleaning process	S1	S2	S3

Therefore, in the present embodiment, the opening degree control of the throttle device of the second cleaning process may be determined by looking up the table.

Optionally, the second cleaning parameter in the second cleaning process further includes a second frequency of the compressor, and is obtained by presetting a second association relationship between the outdoor ambient temperature and the frequency of the compressor. The frequency of the compressor can affect the heat release efficiency of the outdoor heat exchanger, and the higher the operating frequency of the compressor is, the more the refrigerant is discharged, and thus the more the refrigerant flows into the outdoor heat exchanger to exchange heat.

Here, in the second cleaning process, the indoor heat exchanger is in a low-temperature operation state after cooling, and since the indoor unit is in the indoor environment, the cooling rate is also affected by the indoor environment temperature, and the higher the indoor environment temperature is, the greater the influence on cooling is. The frequency of the compressor can change the amount of the circulating refrigerant, and the opening degree of the throttling device can directly determine the temperature and the pressure of the refrigerant flowing into the indoor heat exchanger. Optionally, the frequency of the compressor and the opening degree of the throttling device can be acquired through the indoor environment temperature, so that the adjusted refrigerant can meet the requirement of cooling the indoor heat exchanger, and the influence of the indoor environment temperature on the cooling process is reduced. Optionally, the air conditioner is preset with a third association relationship, where the association relationship includes a corresponding relationship between the indoor ambient temperature and the frequency. In the correlation, the indoor environment temperature and the frequency of the compressor are in a positive correlation, that is, the higher the indoor environment temperature is, the higher the operating frequency of the compressor is, so that the amount of the low-temperature refrigerant input into the indoor heat exchanger is increased, and a rapid cooling effect can be realized under a higher indoor environment condition.

Optionally, a temperature difference between the first cleaning temperature and the second cleaning temperature is greater than a condensation threshold of the indoor heat exchanger, so that when the first cleaning process is switched to the second cleaning process, condensed water is generated on the surface of the indoor heat exchanger due to temperature change. Optionally, the value range of the second cleaning temperature is less than or equal to 5 ℃. Here, since the indoor heat exchanger is in a higher temperature state in the previous cleaning process, and the indoor heat exchanger is switched to a lower temperature state in the cleaning process, the surface temperature of the indoor heat exchanger is greatly changed by cooling and heating; in this example, the second sterilization temperature was 5 ℃.

Optionally, after the indoor heat exchanger is heated to the first cleaning temperature, the temperature of the inner coil is controlled to be greater than the first set temperature and the inner coil is continuously operated for the first set time. Optionally, after the cleaning condition in the first cleaning process, for example, the condition of high-temperature sterilization, is satisfied, the cleaning mode is exited after the temperature of the inner coil is controlled to be greater than the first set temperature and the operation is continued for the first set time. The first set temperature is a known, pre-stored temperature that can be conveniently read by the climate control module. Preferably, the first set coil temperature is higher than the coil temperature when the air conditioner is in normal heating operation. The PID control mode can be adopted to control the air conditioner indoor unit to stably run for at least a first set time by taking the first set coil temperature as the target coil temperature. The first set time is also a known, pre-stored value that can be conveniently read by the air conditioning control module. The specific value can balance the sterilization capability and the energy consumption of the air conditioner. For example, the first set time is 30 min. And after the first set time is timed out, controlling the air conditioner to exit the cleaning mode and return to the previous mode.

Optionally, the defrosting condition of the defrosting mode is determined according to the outdoor ambient temperature; when the surface temperature of the outdoor heat exchanger meets the defrosting condition, controlling the outdoor heat exchanger to enter a defrosting mode; and when the surface temperature of the outdoor heat exchanger does not meet the defrosting condition, controlling the indoor heat exchanger to enter a second cleaning process. The defrosting conditions here include: the surface temperature of the outdoor heat exchanger is continuously less than or equal to the condensation point temperature within a first set time.

When the indoor heat exchanger performs high-temperature sterilization operation in the first cleaning process, the air conditioner adjusts the flow direction of the refrigerant in the system to be consistent with the flow direction of the refrigerant in the heating mode, so that the high-temperature refrigerant discharged by the compressor flows through the indoor heat exchanger first, the indoor heat exchanger is heated by using the heat of the high-temperature refrigerant, the outdoor heat exchanger is in a low-temperature refrigeration state at the moment, and the frosting phenomenon may occur on the surface layer. Generally, under ordinary weather conditions, when the indoor heat exchanger is subjected to high-temperature sterilization, the surface layer of the outdoor heat exchanger is not frosted much, additional defrosting operation is not needed, and the high-temperature sterilization is normally finished and the mode is resumed to enter the previous mode. However, in winter, the outdoor environment temperature is low, the outdoor heat exchanger frosts and the frost layer is thick in the indoor high-temperature sterilization process, at the moment, in order to avoid the outdoor heat exchanger from frosting too thick and even freezing, when the outdoor heat exchanger meets the defrosting condition, the indoor high-temperature sterilization needs to be suspended, and the outdoor heat exchanger is defrosted preferentially.

Specifically, the dew point temperature is determined based on the outdoor ambient temperature. Here, the outdoor ambient temperature may be acquired by a temperature sensor provided in the outdoor unit, or a mobile terminal or a cloud server communicating with the air conditioner. The condensation point temperature is used for judging the frosting condition of the surface layer of the current outdoor sensor and can be obtained through the following formula:

T_es＝C×T_ao-a (1)

wherein, T_esIs the dew point temperature, T_aoThe outdoor ambient temperature is given as C and a are constants, respectively.

Optionally, the value of a has an association relationship with the outdoor ambient humidity. When the surface temperature of the outdoor heat exchanger is continuously less than or equal to the condensation point temperature within a first set time, controlling the outdoor heat exchanger to enter a defrosting mode; and when the surface temperature of the outdoor heat exchanger is continuously greater than or equal to the set temperature within the second set time, controlling the outdoor heat exchanger to exit defrosting. The set temperature is used herein to describe the temperature of the coil in a frost-free layer on the surface of an outdoor heat exchanger. When the outdoor heat exchanger is controlled to enter a defrosting mode, heating and defrosting of the outdoor heat exchanger can be realized through a defrosting circuit arranged on the outdoor heat exchanger; the air conditioner can also be switched by the flow direction of the refrigerant, so that the air conditioner is switched to a state that the outdoor heat exchanger works as a condenser, the outdoor heat exchanger is defrosted, the refrigerant is condensed and released when flowing through the outdoor heat exchanger, the temperature of the outdoor heat exchanger is increased, frost attached to the outdoor heat exchanger is removed, the working state that the outdoor heat exchanger is used as the condenser is kept to continue to operate after the frost attached to the outdoor heat exchanger is removed, and the temperature of the outdoor heat exchanger is continuously increased until the outdoor heat exchanger exits the defrosting mode. Optionally, for the control of the outdoor fan in the defrosting process, the outdoor heat exchanger in the defrosting process corresponding to the outdoor fan is in a heat release state, and the heat release efficiency of the outdoor heat exchanger can be influenced by the heat exchange temperature difference between the outdoor environment temperature and the outdoor heat exchanger, so that the defrosting effect of the outdoor heat exchanger is influenced. Here, the outdoor environment temperature and the outdoor fan are in a positive correlation relationship, that is, the higher the outdoor environment temperature is, the smaller the heat exchange temperature difference between the outdoor environment temperature and the outdoor heat exchanger is, and the larger the heat exchange air volume required for ensuring the heat absorption effect is. Therefore, the rotating speed of the outdoor fan is adjusted according to the outdoor environment temperature, so that the heat dissipation efficiency of the outdoor heat exchanger is enhanced, and the defrosting effect can be improved.

Optionally, a first cleaning parameter of the first cleaning process is obtained according to an outdoor ambient temperature; the first cleaning parameter comprises a first outer machine rotating speed of the outdoor fan, a first frequency of the compressor and a first opening degree of the throttling device.

The control process of the indoor fan in the first cleaning process stage is divided into a front stage and a rear stage, the indoor fan in the front stage is in a stop state, and at the moment, high-temperature refrigerant discharged by the compressor is input into the indoor heat exchanger, so that the indoor heat exchanger is heated as soon as possible, and the heat loss to the indoor environment is reduced, and therefore the indoor fan is controlled to be in the stop state; the indoor fan of the later stage is in a low-rotating-speed state (low-gear wind speed), the surface temperature of the indoor heat exchanger approaches or reaches the first cleaning temperature after the previous stage, and then the indoor fan is controlled to run at a low speed, so that heat can be conducted inside the indoor unit, the temperature of other parts of the indoor unit is increased, and the effect of performing high-temperature sterilization on other parts of the air conditioner is achieved.

Optionally, the front and rear stages of the indoor fan may be set to have a fixed time duration, for example, the time duration of the first cleaning process is 35 minutes, the time duration of the front stage is set to be 5 minutes, and the time duration of the rear stage is set to be 30 minutes; therefore, the state switching of the indoor fan is controlled when the duration of each stage is counted and the duration requirement is met.

In some alternative embodiments, the switching between the first and second stages of the indoor fan may be determined based on the coil temperature.

When the air conditioner starts to execute the first cleaning process of the step S01, detecting the temperature of the coil of the indoor heat exchanger through the temperature sensor in real time, and controlling the indoor fan to be in a shutdown state before the temperature of the coil does not reach the first cleaning temperature, wherein the indoor fan is always in the shutdown state in the previous stage; and after the temperature of the coil pipe reaches the first cleaning temperature, stage switching is carried out, and the indoor fan is switched to a low-rotating-speed state. Compared with the previous implementation mode of controlling according to fixed time, the two-stage state switching of the indoor fan can be realized more accurately, and the heating rate of the indoor heat exchanger and the sterilization effect of other parts of the indoor unit are guaranteed.

In still other alternative embodiments, the switching of the two stages of the indoor fan may be determined based on the initial frequency of the compressor. Here, the initial frequency of the compressor may affect the temperature of the refrigerant discharged therefrom, and thus, the temperature increase rate of the indoor heat exchanger and the time period required for switching the state of the indoor unit.

For example, before the air conditioner performs the first cleaning process of step S01, acquiring an initial frequency of the compressor, and when the initial frequency is greater than a set frequency threshold, the duration of the first stage is a first duration; and when the initial frequency is less than or equal to the set frequency threshold, the duration of the first stage is a second duration, wherein the second duration is greater than the first duration. That is, the greater the initial frequency of the compressor is, the higher the temperature of the discharged refrigerant is, the shorter the time required for the surface temperature of the indoor heat exchanger to reach the first cleaning temperature is. Therefore, the state switching of the indoor fan is controlled according to the initial frequency of the compressor, and the effects of accurately controlling and guaranteeing the heating rate can be achieved.

In some optional embodiments, in the first cleaning process stage, the guide plate of the indoor unit is in a closed state or a slightly opened state, so as to reduce the dissipation of heat inside the indoor unit from the air outlet to the indoor environment. Optionally, in the heating condition, the guide plate of the indoor unit can be controlled to be opened at a slightly larger angle, so that part of refrigerant heat in the first cleaning process can be continuously conveyed to the indoor environment, and discomfort influence on a user caused by reduction of the indoor environment temperature in the cleaning process is avoided.

The parameters of the first cleaning process comprise first cleaning parameters obtained according to the outdoor environment temperature, wherein the first cleaning parameters comprise a first outdoor unit rotating speed of the outdoor fan and a first opening degree of the throttling device.

For the control of the outdoor fan of the first cleaning process, the outdoor heat exchanger corresponding to the outdoor fan is in a heat absorption state, and the heat absorption efficiency of the outdoor heat exchanger can be influenced by the high or low heat exchange temperature difference between the outdoor environment temperature and the outdoor heat exchanger, so that the heating and temperature rising effects on the indoor heat exchanger are influenced; here, the outdoor environment temperature and the outdoor fan are in a negative correlation relationship, that is, the lower the outdoor environment temperature is, the larger the heat exchange temperature difference between the outdoor environment temperature and the outdoor heat exchanger is, and the larger the heat exchange air volume required for ensuring the heat absorption effect is. Therefore, the rotating speed of the outdoor fan is adjusted according to the outdoor environment temperature, so that the heat absorption efficiency of the outdoor heat exchanger is enhanced, and the high-temperature sterilization effect can be improved.

Optionally, the air conditioner is preset with a first association relationship between the outdoor environment temperature and the rotation speed of the external unit, where the first association relationship includes a one-to-one correspondence relationship between the outdoor environment temperature and the rotation speed of the external unit. Therefore, the rotating speed of the outdoor unit corresponding to the current outdoor environment temperature can be obtained by searching the association relation, and the outdoor fan is controlled to operate by taking the rotating speed of the outdoor unit as the rotating speed of the first outdoor unit.

In still other alternative embodiments, the frequency of the compressor can also affect the heat absorption efficiency of the outdoor heat exchanger. Here, the higher the operating frequency of the compressor is, the greater the amount of refrigerant discharged, and therefore the greater the amount of refrigerant flowing into the outdoor heat exchanger to exchange heat. Therefore, in this embodiment, the outdoor environment temperature and the frequency of the compressor are used together to determine the temperature of the outdoor fan in the high-temperature sterilization stage, and an optional corresponding relationship between the outdoor environment temperature Tao and the frequency f of the compressor and the external machine rotation speed of the outdoor fan is shown in table 1:

TABLE 1

Outdoor ambient temperature/frequency	f＜60Hz	60Hz≤f≤99Hz	f＞99Hz
				Tao＜10℃	3	5	7
10≤Tao≤16℃	2	4	5
				Tao＞16℃	2	2	2

In this embodiment, the rotation speed gear of the outdoor fan is set to be 7 levels, and the rotation speed is increased in sequence; in the table 1, the rotation speed gear of the outdoor fan corresponding to each combination of the outdoor environment temperature and the frequency is shown, in this embodiment, the rotation speed control of the outdoor fan in the first cleaning process may be determined by looking up the table.

In some optional embodiments, since the outdoor heat exchanger is in the heat absorption state, the outdoor heat exchanger itself is also in a lower temperature state, and if the outdoor environment temperature is also in a lower temperature state, the outdoor heat exchanger is prone to frost formation, for example, when the cleaning method process is operated under the heating working condition in winter, the outdoor environment temperature is very low, and the outdoor heat exchanger is prone to frost condensation gradually at the high-temperature sterilization stage in the first cleaning process, so that the heat absorption efficiency of the outdoor heat exchanger from the external environment is affected. Therefore, the control of the throttling device in the high-temperature sterilization stage in the first cleaning process mainly adjusts the opening of the throttling device according to the temperature condition of the outdoor environment; for example, the throttling device is adjusted at a higher opening degree when the outdoor environment temperature is lower, so that the refrigerant flowing into the outdoor heat exchanger from the indoor heat exchanger can also keep a higher temperature, and the frosting speed of the outdoor heat exchanger is delayed by utilizing the heat of the residual refrigerant; and when the indoor environment is lower, the throttling device is adjusted by a lower opening degree, so that the temperature and the pressure of the throttled refrigerant are lower, and the heat exchange efficiency of the refrigerant and the external environment is improved.

Optionally, in the first cleaning process, the opening degree of the throttling device of the air conditioner may be adjusted according to the outdoor environment temperature, and the method includes: acquiring a corresponding opening parameter of the throttling device from a preset first incidence relation according to a temperature interval of the outdoor environment temperature; and controlling the opening of the throttling device according to the opening parameter of the throttling device. The outdoor environment temperature and the first temperature-rise opening degree are in positive correlation. When the outdoor environment temperature is lower, the throttling device is adjusted by a lower opening degree, so that the temperature and the pressure of the throttled refrigerant are lower, and the heat exchange efficiency of the refrigerant and the external environment is improved.

In the above embodiments, the outdoor unit of the air conditioner is provided with a temperature sensor, and the temperature sensor can be used for detecting and obtaining the outdoor environment temperature.

Optionally, the first cleaning process further includes obtaining a frequency reduction rate of the compressor when the surface temperature of the target heat exchanger is greater than or equal to a set safe temperature threshold according to the temperature of the indoor coil, where the set safe temperature threshold is greater than the first cleaning temperature. Here, the safe temperature threshold is a critical value of the heat exchanger within a safe temperature range, when the current temperature of the heat exchanger exceeds the safe temperature range, the operation of the air conditioner is damaged, and a fault and a fire are easily caused.

The air conditioner is preset with a fourth incidence relation between the indoor coil temperature and the frequency reduction rate, and the preset fourth incidence relation comprises a corresponding relation between the indoor coil temperature and the frequency reduction rate. In an optional embodiment, the set safety temperature threshold is divided into three threshold steps (a first threshold, a second threshold and a third threshold), and the temperature values of the three threshold steps are gradually increased; when the temperature of the indoor coil is less than or equal to a first threshold value, the current running state of the heat exchanger is normal, and the current running frequency of the compressor is kept; when the temperature of the indoor coil pipe is greater than a first threshold value and less than or equal to a second threshold value, the heat exchanger is abnormal, and the compressor performs frequency reduction at a first frequency reduction rate with a smaller value; when the temperature of the indoor coil pipe is greater than a second threshold value and less than or equal to a third threshold value, the abnormal condition of the heat exchanger is serious, and at the moment, the compressor carries out frequency reduction at a second frequency reduction rate with the value greater than the first frequency reduction rate so as to accelerate the cooling operation of the heat exchanger and the output reduction operation of heat; when the temperature of the indoor coil pipe is larger than a third threshold value, the abnormal condition of the heat exchanger is serious, the compressor is controlled to stop at the moment, and the refrigerant is stopped from being input into the heat exchanger.

In some optional embodiments, in the first cleaning process, the four-way valve switches and maintains a valve position for allowing the refrigerant to flow in a flow direction consistent with the heating mode; in the second cleaning process, the four-way valve is disconnected, the inner fan is controlled to continuously run at low wind, and the outer fan runs at high wind; and under the defrosting mode, the four-way valve is controlled to switch, so that the refrigerant flows in the opposite direction.

The disclosed embodiment provides a control device for cleaning an air conditioner, as shown in fig. 2, including a first control module 21, and a second control module 22; the first control module 21 is configured to control the surface temperature of the indoor heat exchanger to be adjusted to a first cleaning temperature according to a cleaning instruction of the air conditioner, and perform a first cleaning process; the second control module 22 is configured to control the outdoor heat exchanger to enter the defrosting mode or control the indoor heat exchanger to enter the second cleaning process according to the outdoor environment temperature after the first cleaning process is finished.

The embodiment of the disclosure also provides an air conditioner, which comprises the control device for cleaning the air conditioner.

By adopting the air conditioner provided by the embodiment of the disclosure, after the first cleaning process is operated according to the cleaning instruction, the next cleaning process is determined in real time according to the outdoor environment temperature, and the outdoor heat exchanger is defrosted in the defrosting mode, so that not only is the frost layer prevented from freezing to influence the operation of the whole machine, but also the frosting and defrosting cleaning of the outdoor heat exchanger is completed; and the temperature of the indoor heat exchanger is changed under the second cleaning process, so that the air conditioner runs different multi-time self-cleaning processes under different outdoor environment temperatures. The cleaning efficiency of the air conditioner is improved, and the efficient operation of a cleaning mode is guaranteed.

As shown in fig. 3, an embodiment of the present disclosure provides a control device for cleaning an air conditioner, including 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 control method for air conditioner cleaning 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 control method for air conditioner cleaning in the above-described embodiments.

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 control device for cleaning the air conditioner.

The disclosed embodiments provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described control method for air conditioner cleaning.

The disclosed embodiments 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 above-described control method for air conditioner cleaning.

The computer-readable 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 control method for cleaning an air conditioner, comprising:

controlling the surface temperature of the indoor heat exchanger to be adjusted to a first cleaning temperature according to a cleaning instruction of the air conditioner, and performing a first cleaning process;

and after the first cleaning process is finished, controlling the outdoor heat exchanger to enter a defrosting mode according to the outdoor environment temperature, or controlling the indoor heat exchanger to enter a second cleaning process.

2. The method of claim 1, wherein the second cleaning process comprises: controlling the air conditioner to operate at a second cleaning parameter, and controlling the surface temperature of the indoor heat exchanger to be adjusted to a second cleaning temperature;

wherein the second cleaning parameter is obtained according to an outdoor ambient temperature.

3. The method of claim 2, wherein obtaining second cleaning parameters for the second cleaning pass based on the outdoor ambient temperature comprises:

acquiring a corresponding second cleaning parameter from a preset second incidence relation according to the outdoor environment temperature; and the preset second incidence relation comprises a corresponding relation between the outdoor environment temperature and the opening degree of the outer machine throttling device.

4. The control method of claim 1, wherein a temperature difference between the first cleaning temperature and the second cleaning temperature is greater than a condensation threshold of the indoor heat exchanger.

5. The control method according to claim 1, wherein the defrosting condition of the defrosting mode is determined according to an outdoor ambient temperature;

when the surface temperature of the outdoor heat exchanger meets the defrosting condition, controlling the outdoor heat exchanger to enter a defrosting mode; and when the surface temperature of the outdoor heat exchanger does not meet the defrosting condition, controlling the indoor heat exchanger to enter a second cleaning process.

6. The control method of claim 5, wherein the defrost condition comprises: the surface temperature of the outdoor heat exchanger is continuously less than or equal to the condensation point temperature within a first set time; wherein the dew point temperature is determined based on an outdoor ambient temperature.

7. The method of claim 1, wherein the first cleaning parameters of the first cleaning procedure are obtained from outdoor ambient temperature;

the first cleaning parameter comprises a first outer machine rotating speed of the outdoor fan, a first frequency of the compressor and a first opening degree of the throttling device.

8. The method of claim 7, wherein obtaining the first elapsed parameter as a function of the outdoor ambient temperature comprises:

acquiring a corresponding first cleaning parameter from a preset first incidence relation according to the outdoor environment temperature; the preset first incidence relation comprises a corresponding relation between outdoor environment temperature and the rotating speed or the opening degree of the outdoor unit.

9. A control device for air conditioner cleaning, comprising a processor and a memory storing program instructions, characterized in that the processor is configured to execute the control method for air conditioner cleaning according to any one of claims 1 to 8 when executing the program instructions.

10. An air conditioner characterized by comprising the control device for air conditioner cleaning according to claim 9.