Control method and control device of air conditioner, and air conditioner

Abstract

The present application relates to the technical field of air conditioners, in particular to an air conditioner control method, control device and air conditioner, the air conditioner control method comprising the following steps: receiving an instruction to run a cleaning mode, and running the cleaning mode; determining that the cleaning mode is normally running, and then synchronously running a protection mode; in the protection mode, different elements of a refrigerant circulation loop give priority to guaranteeing the running of the cleaning mode. In the protection mode, different working elements of the refrigerant circulation loop of the air conditioner are maintained in a working state of the cleaning mode, the running of the cleaning mode is preferentially guaranteed, interference of other factors is reduced, instruction conflicts and running limitations are avoided, and then the indoor heat exchanger or the outdoor heat exchanger is stably frosted and defrosted, so that automatic cleaning of the heat exchanger is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, in particular to an air conditioner control method, an air conditioner control device and an air conditioner. BACKGROUND

[0002] After the air conditioner is placed for a long time or used for a long time, a large amount of dust will exist in the air conditioner. The dust adheres to the heat exchanger of the indoor unit, which reduces the heat exchange performance of the heat exchanger and causes the performance of the air conditioner to decrease. On the other hand, the dust adheres to the heat exchanger and easily breeds bacteria and forms mold spots. The bacteria and mold spots produce odors in the unit, which seriously threatens the health of the users of the air conditioner. In the related art, the air conditioner removes the adhered dust in the form of frosting and defrosting on the heat exchanger to realize automatic cleaning of the heat exchanger. However, the air conditioner is prone to failure when it operates in the cleaning mode, which affects the cleaning effect and often needs to be handled by professional personnel, thereby reducing the user experience. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, the present application provides an air conditioner control method. When the cleaning mode operates normally, the protection mode is synchronously operated. Different elements of the refrigerant circulation loop preferentially ensure the operation of the cleaning mode, which can reduce interference factors when the cleaning mode operates, and then stabilize the frosting and defrosting to realize automatic cleaning of the heat exchanger.

[0004] The present application also provides an air conditioner control device.

[0005] The present application also provides an air conditioner.

[0006] According to the air conditioner control method provided by the first aspect of the present application, the following steps are included.

[0007] An instruction to operate a cleaning mode is received, and the cleaning mode is operated.

[0008] When the cleaning mode operates normally, the protection mode is synchronously operated. In the protection mode, different elements of the refrigerant circulation loop preferentially ensure the operation of the cleaning mode.

[0009] According to an embodiment of the present application, the step of receiving an instruction to operate a cleaning mode and operating the cleaning mode further includes the following steps.

[0010] When the cleaning mode does not operate normally, a troubleshooting mode is operated. In the troubleshooting mode, the air conditioner exits the cleaning mode and stops operating the coil anti-freezing and overload protection mode within a first preset time period after exiting.

[0011] According to one embodiment of the present application, the step of receiving the instruction of the operation cleaning mode and operating the cleaning mode further comprises:

[0012] acquiring the frost thickness after the heat exchanger operates for a second preset time length;

[0013] determining that the frost thickness is greater than or equal to a preset frost thickness value, and determining that the cleaning mode is normally operated;

[0014] Alternatively, acquiring the frost temperature after the heat exchanger operates for a third preset time length;

[0015] determining that the frost temperature is lower than a preset frost temperature value, and determining that the cleaning mode is normally operated.

[0016] According to one embodiment of the present application, the step of operating the protection mode specifically comprises:

[0017] releasing the limitation of the compressor oil return frequency to make the heat exchanger frost or defrost efficiently.

[0018] According to one embodiment of the present application, the step of operating the protection mode further comprises:

[0019] operating a coil protection mode to protect the indoor coil and the outdoor coil in sequence to promote the heat exchanger to frost stably.

[0020] According to one embodiment of the present application, the step of protecting the indoor coil and the outdoor coil in sequence specifically comprises:

[0021] acquiring the temperature of the indoor coil within a fourth preset time length during which the cleaning mode operates;

[0022] determining that the temperature of the indoor coil is lower than a first temperature threshold, and controlling the compressor to reduce the frequency gradually;

[0023] determining that the temperature of the indoor coil is higher than a second temperature threshold, and controlling the compressor to increase the frequency gradually;

[0024] acquiring the temperature of the outdoor coil within a fifth preset time length after the fourth preset time length during which the cleaning mode operates;

[0025] determining that the temperature of the outdoor coil is lower than the first temperature threshold, and controlling the compressor to reduce the frequency gradually;

[0026] determining that the temperature of the outdoor coil is higher than the second temperature threshold, and controlling the compressor to increase the frequency gradually.

[0027] According to one embodiment of the present application, the step of operating the protection mode further comprises:

[0028] During the cleaning mode, the execution of a new instruction of running the cleaning mode is stopped; and the defrosting interval of the compressor and the running time length are stopped.

[0029] According to one embodiment of the present application, the step of running the cleaning mode further comprises:

[0030] Obtaining the interval time length from the end of the last running of the cleaning mode to the present time;

[0031] If the interval time length is greater than the sixth preset time length, running the cleaning mode.

[0032] According to the control device of the air conditioner provided by the second embodiment of the present application, comprising:

[0033] The receiving module is configured to receive an instruction of running the cleaning mode and run the cleaning mode.

[0034] The control module is configured to, when determining that the cleaning mode is running normally, run the protection mode synchronously.

[0035] According to the air conditioner provided by the third embodiment of the present application, the air conditioner runs the control method of the air conditioner as described above, or comprises the control device of the air conditioner as described above.

[0036] The one or more technical solutions in the present application have at least one of the following technical effects:

[0037] The control method of the air conditioner provided by the first embodiment of the present application comprises the following steps: receiving an instruction of running the cleaning mode and running the cleaning mode; determining that the cleaning mode is running normally, and running the protection mode synchronously; in the protection mode, different elements of the refrigerant circulation loop are preferentially guaranteed to run the cleaning mode. In the protection mode, different working elements of the refrigerant circulation loop of the air conditioner are maintained in the working state of the cleaning mode, the running of the cleaning mode is preferentially guaranteed, the interference of other factors is reduced, the instruction conflict and the running limitation are avoided, and then the indoor heat exchanger or the outdoor heat exchanger is stably frosted and defrosted, so that the automatic cleaning of the heat exchanger is realized. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings needed to be used in the embodiment or related art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0039] Figure 1 One of the flowcharts of the control method of the air conditioner provided by the embodiments of the present application;

[0040] Figure 2 A schematic view of a control device of an air conditioner according to an embodiment of the present application is provided.

[0041] Figure 3 A schematic view of an electronic device according to an embodiment of the present application is provided.

[0042] Reference Signs:

[0043] 300, receiving module; 301, control module. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the application clearer, the technical solutions in the application will be described clearly below in conjunction with the drawings in the application. Obviously, the described embodiments are some of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0045] In the description of the embodiments of the application, it should be noted that the terms “center”, “longitudinal”, “transverse”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the application. In addition, the terms “first”, “second”, “third” are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0046] In the description of the embodiments of the application, it should be noted that unless otherwise explicitly specified and limited, the terms “connected” and “connected” should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0047] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature can be "above", "over" and "on" the second feature, which can be that the first feature is directly above or obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature. The first feature can be "under", "below" and "underneath" the second feature, which can be that the first feature is directly below or obliquely below the second feature, or only means that the first feature is lower in horizontal height than the second feature.

[0048] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0049] The air conditioner provided by the embodiments of the present application comprises an indoor heat exchanger, an outdoor heat exchanger, a throttling device and a compressor, the indoor heat exchanger, the outdoor heat exchanger, the throttling device and the compressor are connected by a refrigerant pipeline to form a refrigerant circulation loop, and the refrigerant flows along the flow direction set by different operation modes to realize functions such as heating, cooling and self-cleaning.

[0050] The operation modes of the air conditioner include a cooling mode, a heating mode and a cleaning mode. The cooling mode is generally applied in summer high-temperature working conditions to reduce the indoor environment temperature. The heating mode is generally applied in winter low-temperature working conditions to improve the indoor environment temperature. The cleaning mode is generally a self-selected function mode or a self-starting function of the user, and can automatically clean the heat exchanger when there is a lot of dust and dirt accumulated on the heat exchanger.

[0051] The cleaning mode of the air conditioner can be used not only for cleaning the indoor heat exchanger, but also for cleaning the outdoor heat exchanger. In specific embodiments, when the air conditioner of the present application executes the cleaning process, only one of the indoor heat exchanger and the outdoor heat exchanger can be cleaned, or both heat exchangers can be cleaned. It should be understood that if the existing air conditioner uses the same or similar control method as the present application to perform self-cleaning operation on the indoor and outdoor heat exchangers, it should also be included in the protection scope of the present application.

[0052] Taking the indoor heat exchanger as an example, the working process of the air conditioner in the cleaning mode mainly includes two stages performed in sequence: the indoor heat exchanger frosting stage and the indoor heat exchanger defrosting stage. In the indoor heat exchanger frosting stage, ice frost can be condensed on the indoor heat exchanger; in the indoor heat exchanger defrosting stage, the ice frost condensed on the indoor heat exchanger in the previous frosting stage is melted, and dirt and other impurities can be separated from the indoor heat exchanger along with the condensed water, and the cleaning process of the indoor heat exchanger is completed. Specifically, during the operation of the air conditioner in the refrigeration mode, if the refrigerant output is increased by increasing the frequency of the compressor, the low-temperature refrigerant input into the indoor unit can be increased, and the excess refrigerant cold quantity can reduce the temperature inside the indoor unit. When the temperature inside the indoor unit is lower than the frosting critical temperature value (such as 0℃), the water vapor in the air flowing through the indoor unit will gradually condense into ice frost on the indoor unit. Therefore, the control method of the present application is to control the refrigerant flow direction of the air conditioner in the refrigeration mode in the indoor heat exchanger frosting stage, and to adjust the operating parameters of the compressor, the fan, the throttling device and other components to realize the ice frosting operation of the indoor heat exchanger. During the operation of the air conditioner in the heating mode, since the high-temperature refrigerant flows through the indoor heat exchanger first, the cold quantity of the high-temperature refrigerant can increase the temperature inside the indoor unit. When the temperature inside the indoor unit is higher than the frosting critical temperature value (such as 0℃), the ice frost condensed inside the indoor unit will gradually melt and drip, so that the ice frost can be separated from the indoor heat exchanger. The control method of the present application is to control the refrigerant flow direction of the air conditioner in the heating mode in the indoor heat exchanger defrosting stage, and to adjust the operating parameters of the compressor, the fan, the throttling device and other components to realize the defrosting operation of the indoor heat exchanger.

[0053] In the above self-cleaning process, each stage can be performed for a predetermined time. During the process of switching the air conditioner to the flow direction defined by the refrigeration mode or the heating mode, the opening / closing and speed of the indoor and outdoor fans also need to be controlled accordingly. For example, during the indoor heat exchanger frosting stage, the indoor fan is generally closed or runs at low speed, and the outdoor fan is turned on; during the indoor heat exchanger defrosting stage, the indoor fan is turned on, and the outdoor fan is closed or runs at low speed. Therefore, the indoor and outdoor units are generally timed separately during the self-cleaning process, and the fans and other components of the air conditioner can be controlled to switch to the corresponding state when the predetermined time is reached.

[0054] In order to smoothly operate the cleaning mode, different elements in the refrigerant circulation loop need to be adjusted to realize coordinated operation. However, there may be logical conflicts in various instructions during the operation of the air conditioner, or some elements may fail, resulting in unstable operation of the cleaning mode.

[0055] According to the control method of the air conditioner provided by the first aspect of the present application, please refer to Figure 1 , which includes the following steps:

[0056] S100, receiving an instruction of running a cleaning mode, and running the cleaning mode.

[0057] S110, determining that the cleaning mode is normally running, and synchronously running a protection mode; in the protection mode, different elements of the refrigerant circulation loop are preferentially guaranteed to run the cleaning mode.

[0058] It can be understood that the air conditioner running the cleaning mode includes user manual starting and controller timing starting and the like. When the user manually starts, a key of the cleaning mode is arranged on a remote controller or a control panel of the air conditioner, and the user can decide whether to actively start the cleaning mode according to the accumulation of dust on the indoor heat exchanger or the outdoor heat exchanger in the process of checking the air conditioner. At the same time, the corresponding program can be stored in the controller, and the cleaning mode is started in time according to the use of the air conditioner and the regional environment.

[0059] The air conditioner running the cleaning mode needs the cooperation of different elements of the refrigerant circulation loop, and at the same time, the conflict with other instructions needs to be avoided. After determining that the air conditioner normally runs the cleaning mode, the protection mode is synchronously run, and then the indoor heat exchanger or the outdoor heat exchanger is stably frosted and defrosted.

[0060] In the protection mode, different elements of the refrigerant circulation loop of the air conditioner are maintained in the working state of the cleaning mode, the running of the cleaning mode is preferentially guaranteed, the interference of other factors is reduced, and then the indoor heat exchanger or the outdoor heat exchanger is stably frosted and defrosted, so as to realize the automatic cleaning of the heat exchanger.

[0061] At the same time, whether the cleaning mode is normally running can be determined by the ways of frosting temperature detection or frosting thickness detection.

[0062] According to one embodiment of the present application, the step of receiving an instruction of running a cleaning mode and running the cleaning mode further includes the step of judging whether the cleaning mode is normally running:

[0063] The frosting thickness of the heat exchanger running for a second preset time length is acquired.

[0064] It is determined that the cleaning mode is normally running when the frosting thickness is greater than or equal to a preset frosting thickness value.

[0065] It is determined that the cleaning mode is not normally running when the frosting thickness is less than the preset frosting thickness value.

[0066] It can be understood that the indoor heat exchanger or the outdoor heat exchanger is provided with a contact sensor, a thickness detection sensor and the like. After the second preset duration of the cleaning mode is run, the frost thickness is up to the standard to prove that the cleaning mode is normally run. If the frost thickness is not up to the standard after the cleaning mode is run for a certain time, it is proved that the cleaning mode is not normally run, and the requirement of defrosting water to clean dust cannot be met.

[0067] In another embodiment, the step of judging whether the cleaning mode is normally run includes the following steps:

[0068] The frost temperature of the heat exchanger after the third preset duration is obtained;

[0069] If the frost temperature is lower than the preset frost temperature, it is determined that the cleaning mode is normally run;

[0070] If the frost temperature is higher than the preset frost temperature, it is determined that the cleaning mode is not normally run.

[0071] It can be understood that the indoor heat exchanger or the outdoor heat exchanger is provided with a temperature sensor, and after the cleaning mode is run for a certain time, the temperature of the indoor heat exchanger or the outdoor heat exchanger needs to reach the preset frost temperature to ensure that the heat exchanger is stably frosted. If the frost temperature of the heat exchanger does not reach the preset frost temperature after the cleaning mode is run for a certain time, it is proved that the cleaning mode is not normally run.

[0072] Of course, whether the cleaning mode is normally run can also be judged by detecting the running state of the compressor, the condenser, the evaporator and the throttling valve.

[0073] According to one embodiment of the present application, the step of receiving the instruction of running the cleaning mode and running the cleaning mode further includes the following steps:

[0074] S120, if it is determined that the cleaning mode is not normally run, a troubleshooting mode is run; in the troubleshooting mode, the air conditioner exits the cleaning mode and stops running the coil anti-freezing and overload protection mode within the first preset duration after the exit.

[0075] It can be understood that when the air conditioner runs the cleaning mode, there may be a logical conflict between the instruction of the cleaning mode and the instruction of other working modes, or some elements are faulty, resulting in that the cleaning mode is not run or is abnormally run. When the cleaning mode is not normally run, the air conditioner runs the troubleshooting mode to find the root cause and solve it in time to ensure that the cleaning mode can be normally run.

[0076] In the troubleshooting mode, the load of the compressor needs to be detected. If the air conditioner has been in a high load or overload state before running the cleaning mode, for example, a high-temperature refrigeration mode, even if the air conditioner runs the cleaning mode, the compressor cannot meet the frosting demand of the heat exchanger. At this time, the cleaning mode needs to be exited or the compressor needs to be protected, and the compressor needs to be stopped.

[0077] In some cases, the step of running the troubleshooting mode specifically includes:

[0078] The air conditioner exits the cleaning mode and stops running the coil anti-freezing and overload protection mode within a first preset time period after exiting.

[0079] It can be understood that when the air conditioner runs the cleaning mode, the dust adhered to the heat exchanger is cleaned by the form of first frosting and then defrosting of the heat exchanger. When the air conditioner runs other modes, in order to improve the heat exchange efficiency of the heat exchanger, the coil anti-freezing and overload protection mode is usually started, that is, the coil of the heat exchanger is prevented from frosting, so as to promote the heat exchange between the air and the heat exchanger. Therefore, there is a conflict in the instructions between the coil anti-freezing and overload protection mode and the cleaning mode. When the troubleshooting mode is run, the cleaning mode is first exited, and then the coil anti-freezing and overload protection mode is stopped within a first preset time period (usually 30 seconds). During this period, the user can restart the cleaning mode.

[0080] After the coil anti-freezing and overload protection mode is stopped, the cleaning mode can be smoothly run, and the heat exchanger can be quickly frosted.

[0081] According to an embodiment of the present application, the step of running the protection mode specifically includes:

[0082] S111, the restriction of the oil return frequency of the compressor is released to make the heat exchanger frost or defrost efficiently.

[0083] It can be understood that in order to avoid the long-time high load or overload operation of the compressor in a harsh environment and to avoid affecting the service life of the compressor, the oil return frequency of the compressor is limited, that is, even in a harsh environment, the healthy operation of the air conditioner needs to be prioritized. In the cleaning mode, in order to promote the rapid frosting and defrosting of the indoor heat exchanger or the outdoor heat exchanger, the restriction of the oil return frequency of the compressor can be temporarily released to improve the refrigeration and heating efficiency of the compressor, so as to ensure the operation of the cleaning mode.

[0084] It should be noted that the duration of the cleaning mode is very short, and the time interval between adjacent two cleaning modes is relatively long, so the temporary release of the oil return frequency of the compressor has little effect on the service life of the compressor.

[0085] According to an embodiment of the present application, the step of running the protection mode further includes:

[0086] S112, running the coil protection mode to protect the indoor coil and the outdoor coil in sequence to promote stable frosting of the heat exchanger.

[0087] It should be noted that in the coil protection mode, the temperature of the indoor coil and the outdoor coil can reach a stable temperature value or temperature range, which not only can promote efficient frosting and defrosting of the indoor heat exchanger and the outdoor heat exchanger, but also can avoid low temperature from causing coil cracking damage, thereby promoting stable frosting of the heat exchanger.

[0088] In an embodiment, the step of running the protection mode further comprises:

[0089] S113, determining the outdoor environment temperature only once.

[0090] It can be understood that the purpose of running the cleaning mode is to use defrosting water to remove dust adhered to the indoor heat exchanger and the outdoor heat exchanger, and not to adjust the indoor temperature, so that the cleaning mode is directly run after the outdoor environment temperature is obtained, and the running mode of the air conditioner is no longer adjusted according to the outdoor environment temperature during the running of the cleaning mode, thereby improving the efficiency of frosting and defrosting.

[0091] According to an embodiment of the present application, the step of protecting the indoor coil and the outdoor coil in sequence comprises:

[0092] S1121, obtaining the temperature of the indoor coil within the fourth preset time length of the running of the cleaning mode;

[0093] S1122, determining that the temperature of the indoor coil is lower than the first temperature threshold, and then gradually reducing the frequency of the compressor.

[0094] S1123, determining that the temperature of the indoor coil is higher than the second temperature threshold, and then gradually increasing the frequency of the compressor.

[0095] It can be understood that the temperature of the indoor coil (the coil of the indoor heat exchanger) is obtained by the temperature sensor within the fourth preset time length (for example, within 0min to 9min) of the running of the cleaning mode. If the temperature of the indoor coil is between the first temperature threshold and the second temperature threshold, it indicates that the frosting efficiency of the indoor heat exchanger is high and the risk of coil freezing and cracking is small at this time. If the temperature of the indoor coil is higher than the second temperature threshold, for example, the temperature is higher than -10℃, it indicates that the temperature of the indoor coil is high at this time, the frosting efficiency of the indoor heat exchanger is low, and the frequency of the compressor needs to be gradually increased to reduce the temperature of the indoor coil, and the frequency of the compressor is increased at a frequency of 1Hz / 10s. If the temperature of the indoor coil is lower than the first temperature threshold, for example, the temperature is lower than -15℃, it indicates that the temperature of the indoor coil is low at this time, and the coil has a risk of freezing and cracking, and the frequency of the compressor needs to be gradually reduced to increase the temperature of the indoor coil, and the frequency of the compressor is reduced at a frequency of 1Hz / 10s.

[0096] After the indoor heat exchanger is cleaned, the outdoor heat exchanger cleaning mode can be switched to. During the defrosting of the indoor heat exchanger, the outdoor heat exchanger is in a low temperature state, so switching to the outdoor heat exchanger cleaning mode can also save a part of heat.

[0097] S1124, acquiring the temperature of the outdoor coil within a fifth preset time length after the fourth preset time length of the cleaning mode is run;

[0098] S1125, determining that the temperature of the outdoor coil is lower than the first temperature threshold, and gradually reducing the frequency of the compressor.

[0099] S1126, determining that the temperature of the outdoor coil is higher than the second temperature threshold, and gradually increasing the frequency of the compressor.

[0100] It can be understood that within the fifth preset time length after the fourth preset time length (for example, within 0min to 9min) of the cleaning mode is run, the temperature of the outdoor coil (the coil of the outdoor heat exchanger) is acquired by the temperature sensor. If the temperature of the outdoor coil is between the first temperature threshold and the second temperature threshold, it means that the frosting efficiency of the outdoor heat exchanger is relatively high at this time, and the risk of freezing and cracking of the coil is relatively small; if the temperature of the outdoor coil is higher than the second temperature threshold, for example, the temperature is higher than -10℃, it means that the temperature of the outdoor coil is relatively high at this time, the frosting efficiency of the outdoor heat exchanger is relatively low, and the frequency of the compressor needs to be gradually increased to reduce the temperature of the outdoor coil, and the compressor is increased in frequency at a frequency of 1Hz / 10s; if the temperature of the outdoor coil is lower than the first temperature threshold, for example, the temperature is lower than -15℃, it means that the temperature of the outdoor coil is relatively low at this time, and the coil has the risk of freezing and cracking, and the frequency of the compressor needs to be gradually reduced to increase the temperature of the outdoor coil, and the compressor is reduced in frequency at a frequency of 1Hz / 10s.

[0101] In some embodiments, there is an interval, for example, 1.5min, between the indoor coil protection and the outdoor coil protection, for example, the indoor coil is protected within 0min to 9min, and the outdoor coil is protected within 10.5min to 19.5min.

[0102] According to an embodiment of the present application, the step of running the protection mode further comprises:

[0103] S114, during the running of the cleaning mode, stopping executing new instructions of running the cleaning mode; and simultaneously stopping the timing of the defrosting interval and the running time length of the compressor.

[0104] It can be understood that when the cleaning mode is running, the frosting time and the defrosting time of the indoor heat exchanger or the outdoor heat exchanger are determined, for example, the frosting time is 10 minutes and the defrosting time is 12 minutes, if the instruction of refreshing the running cleaning mode is executed during the running process, the frosting time will be increased or the defrosting time will be increased, which will affect the cleaning effect of dust. Therefore, in the protection mode, the new instruction of running the cleaning mode is stopped.

[0105] At the same time, the running cleaning mode can make the indoor heat exchanger and the outdoor heat exchanger frost and defrost actively, and the compressor has realized the defrosting process during the defrosting time, so the timing of the defrosting interval and the running time can be stopped, and after the cleaning mode is ended, the timing of the defrosting interval is restarted, which can save a defrosting process and save energy.

[0106] According to one embodiment of the present application, the step of receiving the instruction of running the cleaning mode and running the cleaning mode further comprises:

[0107] S101, acquiring the interval time from the end of the last running cleaning mode to the present;

[0108] S102, determining that the interval time is greater than the sixth preset time, and then running the cleaning mode.

[0109] It can be understood that when the air conditioner runs the cleaning mode, the compressor runs at high load, which can make the indoor heat exchanger or the outdoor heat exchanger frost or defrost quickly. In this case, in order to avoid the continuous high load running of the compressor, it is necessary to ensure that the running interval of the adjacent two cleaning modes is greater than the sixth preset time, for example, 5 minutes.

[0110] According to the control device of the air conditioner provided by the second embodiment of the present application, please refer to Figure 2 , comprising:

[0111] The receiving module 300 is used for receiving the instruction of running the cleaning mode and running the cleaning mode.

[0112] The control module 301 is used for determining that the cleaning mode is running normally, and then running the protection mode synchronously; in the protection mode, different elements of the refrigerant circulation loop preferentially guarantee the running of the cleaning mode.

[0113] According to the air conditioner provided by the third embodiment of the present application, the air conditioner runs and executes the control method of the air conditioner provided by the first embodiment of the present application, or comprises the control device of the air conditioner provided by the second embodiment of the present application.

[0114] It can be understood that the air conditioner needs to run the cleaning mode in cooperation with different elements of the refrigerant circulation loop, while avoiding conflicts with other instructions. After determining that the air conditioner normally runs the cleaning mode, the protection mode is simultaneously run, so that the air conditioner normally runs the cleaning mode, and thus the indoor heat exchanger or the outdoor heat exchanger stably frosts and defrosts.

[0115] In the protection mode, different elements of the refrigerant circulation loop are maintained in the working state of the cleaning mode, the smooth progress of the cleaning mode is preferentially ensured, the interference of other factors is reduced, and thus the indoor heat exchanger or the outdoor heat exchanger stably frosts and defrosts, so as to realize the automatic cleaning of the heat exchanger.

[0116] It should be noted that whether the cleaning mode is normally run can be determined by temperature detection or frost thickness detection.

[0117] In one case, a temperature sensor is arranged at the indoor heat exchanger or the outdoor heat exchanger. After running the cleaning mode for a certain time, the temperature of the indoor heat exchanger or the outdoor heat exchanger needs to reach a preset value (zero degrees Celsius and below) to ensure that the heat exchanger stably frosts. If the temperature of the heat exchanger does not reach the preset value after running the cleaning mode for a certain time, it indicates that the cleaning mode is not normally run.

[0118] In another case, a contact sensor, a thickness detection sensor or the like is arranged at the indoor heat exchanger or the outdoor heat exchanger. After running the cleaning mode for a certain time, the thickness of the frost needs to reach a standard to prove that the cleaning mode is normally run. If the thickness of the frost does not reach the standard after running the cleaning mode for a certain time, it proves that the cleaning mode is not normally run and cannot meet the requirement of cleaning dust with defrosting water.

[0119] Of course, whether the cleaning mode is normally run can also be determined by detecting the running states of the compressor, the condenser, the evaporator and the throttling valve in different time periods.

[0120] Figure 3 An example of an electronic device is shown in the physical structure diagram. As shown in the figure, the electronic device can include a processor 810, a communications interface 820, a memory 830 and a communications bus 840. The processor 810, the communications interface 820 and the memory 830 complete mutual communication through the communications bus 840. The processor 810 can call the logical instructions in the memory 830 to execute the control method of the air conditioner, which includes receiving an instruction to run a cleaning mode and running the cleaning mode, determining that the cleaning mode is normally run, and synchronously running a protection mode. In the protection mode, different elements of the refrigerant circulation loop preferentially ensure the running of the cleaning mode.

[0121] Further, the logic instructions in the memory 830 described above can be implemented in the form of software functional units and sold or used as independent products, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or partially contribute to the prior art, or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of the embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory 830 (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0122] Further, the present application discloses a computer program product, the computer program product comprises a computer program stored on a non-transitory computer readable storage medium, and the computer program comprises program instructions. When the program instructions are executed by a computer, the computer can execute the control method of the air conditioner provided by the above-mentioned method embodiments. The method comprises the following steps: receiving an instruction of running a cleaning mode, and running the cleaning mode; determining that the cleaning mode is normally running, and synchronously running a protection mode; in the protection mode, different elements of a refrigerant circulation loop preferentially guarantee the running of the cleaning mode.

[0123] On the other hand, the present application also provides a non-transitory computer readable storage medium, which stores a computer program. When the computer program is executed by a processor, the control method of the air conditioner provided by the above-mentioned embodiments is implemented. The method comprises the following steps: receiving an instruction of running a cleaning mode, and running the cleaning mode; determining that the cleaning mode is normally running, and synchronously running a protection mode; in the protection mode, different elements of a refrigerant circulation loop preferentially guarantee the running of the cleaning mode.

[0124] The device embodiments described above are only schematic, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., they can be located in one place, or distributed on a plurality of network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the present embodiment. Those skilled in the art can understand and implement without creative labor.

[0125] Those skilled in the art can clearly understand the technical solutions of the various embodiments from the above description of the embodiments, and the various embodiments can be implemented by means of software necessary in combination with a general hardware platform. Of course, they can also be implemented by hardware. Based on such an understanding, the technical solutions described above, which are essential or contribute to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, and the like, and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments or some parts of the methods.

[0126] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

[0127] The above only describes the preferred embodiments of the present application, and does not limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A control method of an air conditioner, characterized by, The method comprises the following steps: receiving an instruction of running a cleaning mode, and running the cleaning mode; determining that the cleaning mode is normally running, and synchronously running a protection mode; in the protection mode, different elements of a refrigerant circulation loop give priority to the running of the cleaning mode; the step of running the protection mode specifically comprises: removing the limitation of the oil return frequency of the compressor to make the heat exchanger frost or defrost efficiently; the step of running the protection mode further comprises: stopping the execution of a new instruction of running the cleaning mode during the running of the cleaning mode; and stopping the timing of the defrosting interval and the running time length of the compressor; the step of running the protection mode further comprises: running a coil protection mode to protect the indoor coil and the outdoor coil in sequence to promote the stable frosting of the heat exchanger; the step of protecting the indoor coil and the outdoor coil in sequence specifically comprises: acquiring the temperature of the indoor coil within a fourth preset time length during which the cleaning mode runs; determining that the temperature of the indoor coil is lower than a first temperature threshold, and gradually reducing the frequency of the compressor; determining that the temperature of the indoor coil is higher than a second temperature threshold, and gradually increasing the frequency of the compressor; acquiring the temperature of the outdoor coil within a fifth preset time length after the fourth preset time length during which the cleaning mode runs; determining that the temperature of the outdoor coil is lower than the first temperature threshold, and gradually reducing the frequency of the compressor; determining that the temperature of the outdoor coil is higher than the second temperature threshold, and gradually increasing the frequency of the compressor; after the step of receiving the instruction of running the cleaning mode and running the cleaning mode, the method further comprises: determining that the cleaning mode is not normally running, and running a fault diagnosis mode; in the fault diagnosis mode, the air conditioner exits the cleaning mode and stops running a coil anti-freezing and overload protection mode within a first preset time length after the exit.

2. The control method of the air conditioner according to claim 1, characterized by, after the step of receiving the instruction of running the cleaning mode and running the cleaning mode, the method further comprises: acquiring the frost thickness of the heat exchanger after the heat exchanger runs for a second preset time length; determining that the frost thickness is greater than or equal to a preset frost thickness, and determining that the cleaning mode is normally running; or, acquiring the frost temperature of the heat exchanger after the heat exchanger runs for a third preset time length; determining that the frost temperature is lower than a preset frost temperature, and determining that the cleaning mode is normally running.

3. The control method of an air conditioner according to any one of claims 1 to 2, characterized by, before the step of running the cleaning mode, the method further comprises: acquiring an interval time length from the end of the last time of running the cleaning mode to the present time; determining that the interval time length is greater than a sixth preset time length, and running the cleaning mode.

4. A control device for an air conditioner, characterized by comprising: The method comprises the following steps: a receiving module configured to receive an instruction of running a cleaning mode, and run the cleaning mode; a control module configured to determine that the cleaning mode is normally running, and synchronously run a protection mode; in the protection mode, different elements of a refrigerant circulation loop give priority to the running of the cleaning mode; the step of running the protection mode specifically comprises: removing the limitation of the oil return frequency of the compressor to make the heat exchanger frost or defrost efficiently; the step of running the protection mode further comprises: running a coil protection mode to protect the indoor coil and the outdoor coil in sequence to promote the stable frosting of the heat exchanger; The step of running the protection mode further comprises: stopping execution of a new instruction of running the cleaning mode during running of the cleaning mode; and stopping the compressor defrosting interval and the running time interval at the same time; The protection of the indoor coil and the outdoor coil in sequence comprises: acquiring the temperature of the indoor coil within a fourth preset time interval during running of the cleaning mode; determining that the temperature of the indoor coil is lower than a first temperature threshold, and gradually reducing the frequency of the compressor; determining that the temperature of the indoor coil is higher than a second temperature threshold, and gradually increasing the frequency of the compressor; acquiring the temperature of the outdoor coil within a fifth preset time interval after the fourth preset time interval during running of the cleaning mode; determining that the temperature of the outdoor coil is lower than the first temperature threshold, and gradually reducing the frequency of the compressor; determining that the temperature of the outdoor coil is higher than the second temperature threshold, and gradually increasing the frequency of the compressor; The step of receiving an instruction of running the cleaning mode and running the cleaning mode further comprises: determining that the cleaning mode is not running normally, and running a troubleshooting mode; in the troubleshooting mode, the air conditioner exits the cleaning mode, and stops running the coil anti-freezing and overload protection mode within a first preset time interval after exiting.

5. An air conditioner characterized by comprising: The air conditioner runs the control method of the air conditioner according to any one of claims 1 to 3, or comprises the control device of the air conditioner according to claim 4.

Images