Air conditioner control method, device, air conditioner and storage medium

Abstract

The present invention relates to the technical field of air conditioners, and discloses a control method, device, air conditioner and storage medium of an air conditioner, the method comprising: when the air conditioner is in a heating high-temperature steam washing stage, obtaining a first operating pressure of the air conditioner; when it is detected that the first operating pressure is greater than a preset pressure threshold, adjusting the operating state of an outdoor fan of the air conditioner; obtaining a second operating pressure after the air conditioner has been running for a preset time in the adjusted outdoor fan operating state; and, if it is detected that the second operating pressure is greater than the preset pressure threshold, adjusting the operating frequency of the compressor of the air conditioner so that the air conditioner enters a high-temperature sterilization stage, thereby when the air conditioner is in the heating high-temperature steam washing stage, the outdoor fan state of the air conditioner and the operating frequency of the compressor of the air conditioner are adjusted according to the operating pressure of the air conditioner to reduce the operating pressure of the air conditioner, thereby allowing the air conditioner to enter a high-temperature sterilization stage.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a control method and device for an air conditioner, an air conditioner and a storage medium. Background Art

[0002] Most air conditioners now have a high-temperature sterilization function. However, for some air conditioners with high and low pressure switches, when the air conditioner performs high-temperature sterilization, the indoor pipe temperature is relatively low during the condensation and frosting stages of the previous intelligent cleaning. Therefore, when switching to the hot high-temperature steam washing stage, the indoor pipe temperature rises slowly, causing the indoor unit to be in the cold wind protection stage, causing the air conditioner to be over-pressured and shut down for high-pressure protection, which prevents the air conditioner from entering the high-temperature sterilization stage. In addition, due to the pressure protection shutdown, the high-temperature sterilization is exited early, resulting in the cold wind protection being prolonged the next time the heating is turned on, resulting in poor comfort. Summary of the invention

[0003] The present invention provides a control method and device for an air conditioner, an air conditioner and a storage medium, aiming to solve the technical problem that the current fixed-frequency air conditioner is difficult to enter the high-temperature sterilization stage when performing a high-temperature sterilization process.

[0004] To achieve the above object, the present invention provides a method for controlling an air conditioner, the method comprising:

[0005] When the air conditioner is in a heating high-temperature steam washing stage, obtaining a first operating pressure of the air conditioner;

[0006] When it is detected that the first operating pressure is greater than a preset pressure threshold, adjusting the operating state of the outdoor fan of the air conditioner;

[0007] Obtaining a second operating pressure after the air conditioner has been operated for a preset time in the adjusted outdoor fan operating state; and,

[0008] If it is detected that the second operating pressure is greater than a preset pressure threshold, the operating frequency of the compressor of the air conditioner is adjusted so that the air conditioner enters a high-temperature sterilization stage.

[0009] Optionally, when it is detected that the first operating pressure is greater than a preset pressure threshold, the first outdoor fan of the air conditioner is controlled to stop running;

[0010] Acquire a third operating pressure after the air conditioner has been running for a preset time in the adjusted outdoor fan operating state, and use the third operating pressure as a new first operating pressure;

[0011] If it is detected that the first operating pressure is greater than a preset pressure threshold, the second outdoor fan of the air conditioner is controlled to stop running, wherein the first outdoor fan and the second outdoor fan are both fans arranged at the outdoor heat exchanger of the air conditioner.

[0012] Optionally, if it is detected that the second operating pressure is greater than a preset pressure threshold, the operating frequency of the compressor of the air conditioner is reduced;

[0013] obtaining a fourth operating pressure when the air conditioner operates with the adjusted compressor;

[0014] If it is detected that the fourth operating pressure is less than or equal to the preset pressure threshold, the air conditioner is controlled to maintain operation in the current operating state, and when it is detected that the indoor heat exchanger temperature of the air conditioner reaches the preset temperature, the air conditioner is controlled to enter the high-temperature sterilization stage.

[0015] Optionally, when the air conditioner is in a high-temperature sterilization stage, obtaining the temperature of an indoor heat exchanger of the air conditioner;

[0016] If it is detected that the temperature of the indoor heat exchanger of the air conditioner is less than a first temperature threshold, the operating speed of the indoor fan of the air conditioner is reduced and / or the operating frequency of the compressor of the air conditioner is increased.

[0017] Optionally, if it is detected that the temperature of the indoor heat exchanger of the air conditioner is greater than a second temperature threshold, the operating speed of the indoor fan of the air conditioner is increased and / or the operating frequency of the compressor of the air conditioner is reduced.

[0018] Optionally, when it is detected that the first operating pressure is less than or equal to a preset pressure threshold, the air conditioner is controlled to maintain operation in the current operating state, and when it is detected that the indoor heat exchanger temperature of the air conditioner reaches a preset temperature, the air conditioner is controlled to enter a high-temperature sterilization stage.

[0019] Optionally, upon receiving a cleaning instruction, the air conditioner is controlled to enter a condensed water production stage;

[0020] When it is detected that the operating parameter of the air conditioner in the condensing water production stage reaches a first preset operating parameter condition, controlling the air conditioner to enter the refrigeration and frosting stage;

[0021] When it is detected that the operating parameter of the air conditioner in the condensing water production stage reaches a second preset operating parameter condition, controlling the air conditioner to enter a cooling standby state;

[0022] When it is detected that the operating pressure difference of the air conditioner reaches a preset pressure difference, the air conditioner is controlled to enter a heating high-temperature steam washing stage.

[0023] In addition, to achieve the above-mentioned purpose, the present invention further provides a control device for an air conditioner, the control device for the air conditioner comprising:

[0024] A first acquisition module, used for acquiring a first operating pressure of the air conditioner when the air conditioner is in a heating high-temperature steam washing stage;

[0025] A first adjustment module, configured to adjust the operating state of the outdoor fan of the air conditioner when it is detected that the first operating pressure is greater than a preset pressure threshold;

[0026] A second acquisition module is used to acquire a second operating pressure after the air conditioner has been running for a preset time in the adjusted outdoor fan operating state; and

[0027] The second adjustment module is used to adjust the operating frequency of the compressor of the air conditioner if it is detected that the second operating pressure is greater than a preset pressure threshold, so that the air conditioner enters a high-temperature sterilization stage.

[0028] In addition, to achieve the above-mentioned purpose, the present invention also provides an air conditioner, which includes a processor, a memory and an air conditioner control program stored in the memory. When the air conditioner control program is executed by the processor, the steps of the air conditioner control method as described above are implemented.

[0029] In addition, to achieve the above-mentioned purpose, the present invention also provides a computer storage medium, on which a control program of an air conditioner is stored. When the control program of the air conditioner is executed by a processor, the steps of the control method of the air conditioner as described above are implemented.

[0030] Compared with the prior art, the present invention provides a control method for an air conditioner, by obtaining a first operating pressure of the air conditioner when the air conditioner is in a heating high-temperature steam washing stage, and adjusting the operating state of the outdoor fan of the air conditioner when it is detected that the first operating pressure is greater than a preset pressure threshold, and obtaining a second operating pressure after the air conditioner has been running for a preset time in the adjusted outdoor fan operating state; and, if it is detected that the second operating pressure is greater than the preset pressure threshold, adjusting the operating frequency of the compressor of the air conditioner so that the air conditioner enters a high-temperature sterilization stage. Therefore, in the present invention, when the air conditioner is in a heating high-temperature steam washing stage, the outdoor fan state of the air conditioner and the operating frequency of the compressor of the air conditioner are adjusted according to the operating pressure of the air conditioner to reduce the operating pressure of the air conditioner, thereby allowing the air conditioner to enter a high-temperature sterilization stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the hardware structure of the air conditioner involved in each embodiment of the present invention;

[0032] Figure 2 is a structural schematic diagram of an air conditioner involved in the control method of the air conditioner of the present invention;

[0033] Figure 3 is a flow chart of a first embodiment of a method for controlling an air conditioner according to the present invention;

[0034] Figure 4 is a flow chart of a second embodiment of a method for controlling an air conditioner according to the present invention;

[0035] Figure 5 is a flow chart of a third embodiment of a method for controlling an air conditioner according to the present invention;

[0036] Figure 6 It is a functional module diagram of an embodiment of a control device for an air conditioner of the present invention. Description of the drawings:

[0038] Label name Label name 1 Indoor fan 9 First outdoor fan 2 Indoor heat exchanger 10 Second outdoor fan 3 First pipeline temperature sensor 11 First filter 4 compressor 12 Throttle valve 5 Gas-Liquid Separator 13 Second filter 6 Four-way valve 14 High voltage switch 7 Outdoor heat exchanger 15 Low voltage switch 8 Second pipeline temperature sensor

[0039] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0041] Reference Figure 1 , Figure 1 1 is a schematic diagram of the hardware structure of the air conditioner involved in each embodiment of the present invention. In the embodiment of the present invention, the air conditioner may include a processor 1001 (such as a central processing unit, CPU), a communication bus 1002, an input port 1003, an output port 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components; the input port 1003 is used for data input; the output port 1004 is used for data output, and the memory 1005 can be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 can also be a storage device independent of the aforementioned processor 1001. Those skilled in the art can understand that Figure 1 The hardware structure shown in the figure does not constitute a limitation of the present invention, and may include more or less components than those shown in the figure, or combine certain components, or arrange the components differently.

[0042] Continue to refer to Figure 1 , Figure 1 The memory 1005 as a readable storage medium may include an operating system, a network communication module, an application module, and a control program for the air conditioner. Figure 1 In the terminal shown, the output port 1004 is mainly used to connect to the background server and communicate data with the background server; the input port 1003 is mainly used to connect to the client (user end) and communicate data with the client; and the processor 1001 can be used to call the control program of the air conditioner stored in the memory 1005.

[0043] In this embodiment, the air conditioner includes: a memory 1005, a processor 1001, and a control program of the air conditioner stored in the memory 1005 and executable on the processor 1001, wherein the processor 1001 calls the control program of the air conditioner stored in the memory 1005 and performs the following operations:

[0044] When the air conditioner is in a heating high-temperature steam washing stage, obtaining a first operating pressure of the air conditioner;

[0045] When it is detected that the first operating pressure is greater than a preset pressure threshold, adjusting the operating state of the outdoor fan of the air conditioner;

[0046] Obtaining a second operating pressure after the air conditioner has been operated for a preset time in the adjusted outdoor fan operating state; and,

[0047] If it is detected that the second operating pressure is greater than a preset pressure threshold, the operating frequency of the compressor of the air conditioner is adjusted so that the air conditioner enters a high-temperature sterilization stage.

[0048] based on Figure 1 According to the hardware structure shown, the first embodiment of the present invention provides a method for controlling an air conditioner.

[0049] It should be noted that the air conditioner mentioned in this embodiment refers to a variable frequency air conditioner, that is, the speed of the compressor of the air conditioner is variable, and it is a variable frequency compressor. Figure 2 , Figure 2 The structure diagram of the air conditioner involved in the present invention is as follows: Figure 2 As shown, the air conditioner is divided into an outdoor side and an indoor side, wherein the indoor side includes an indoor fan 1, an indoor heat exchanger 2 and a first pipe temperature sensor 3 for detecting the temperature of the outdoor heat exchanger 7, wherein the indoor fan 1 is used to drive the indoor air to pass through the indoor heat exchanger, so that the indoor air exchanges heat with the refrigerant in the coil of the indoor heat exchanger, and the indoor heat exchanger 2 acts as an evaporating end during cooling and absorbs heat from the refrigerant, and acts as a condensing end during heating and dissipates heat from the refrigerant.

[0050] Furthermore, the outdoor side includes, in sequence, a compressor 4 with a variable speed, a gas-liquid separator 5, a four-way valve 6, an outdoor heat exchanger 7, a second pipeline temperature sensor 8 for detecting the temperature of the outdoor heat exchanger 7, a first outdoor fan 9, a second outdoor fan 10, a first filter 11 for filtering impurities in the refrigerant pipeline of the air conditioner to prevent the impurities from entering the throttling component and causing a poor throttling effect or dirty blockage, a throttle valve 12, and a second filter 13 for filtering impurities in the refrigerant pipeline of the air conditioner to prevent the impurities from entering the throttling component and causing a poor throttling effect or dirty blockage.

[0051] Among them, in this embodiment, the throttle valve 12 is composed of a cooling throttle valve and a heating throttle valve. It should be noted that the heating throttle valve plays a role of throttling and reducing pressure when the air conditioner is heating, and does not play a throttling role when the air conditioner is cooling, that is, one-way throttling, and no throttling in the reverse direction. Similarly, the cooling throttle valve plays a role of throttling and reducing pressure when the air conditioner is cooling, and does not play a throttling role when the air conditioner is heating, that is, one-way throttling, and no throttling in the reverse direction.

[0052] In addition, in the present embodiment, the air conditioner further includes a high-pressure switch 14 and a low-pressure switch 15. It should be noted that, in order to avoid high-pressure damage to the air conditioner, when the operating pressure of the air conditioner is higher than the pressure threshold, the mechanical components inside the high-pressure switch will be disconnected, so that the port connected to the air conditioner mainboard detects a disconnection signal, thereby feedback that the system needs to be shut down for protection. Similarly, in order to avoid low-pressure damage to the air conditioner, when the operating pressure of the air conditioner is higher than the pressure threshold, the mechanical components inside the low-pressure switch will be disconnected, so that the port connected to the air conditioner mainboard detects a disconnection signal, thereby feedback that the system needs to be shut down for protection.

[0053] In addition, in this embodiment, the first outdoor fan 9 is a fan arranged at the outdoor heat exchanger 7 of the air conditioner, and the second outdoor fan 10 is also a fan arranged at the outdoor heat exchanger 7 of the air conditioner, wherein the above-mentioned outdoor fan is used to drive the outdoor air to pass through the outdoor heat exchanger 7, so that the outdoor air can exchange heat with the refrigerant in the pipe of the outdoor heat exchanger 7.

[0054] It should be further explained that, in the present embodiment, the number of external fans at the outdoor heat exchanger 7 of the air conditioner is not limited. In other words, in the present embodiment, other external fans may be installed in the vertical direction of the outdoor heat exchanger 7 of the air conditioner, and the present embodiment does not impose any restrictions on this.

[0055] Furthermore, in this embodiment, in order to flexibly control the heat dissipation of the outdoor heat exchanger, the exhaust port of the above-mentioned first outdoor fan 9 can be directed toward the upper part of the outdoor heat exchanger 7, thereby driving the outdoor air to the upper area of ​​the outdoor heat exchanger 7 through the above-mentioned first outdoor fan 9 for heat exchange, and at the same time, the exhaust port of the above-mentioned second outdoor fan 10 can also be directed toward the lower part of the outdoor heat exchanger 7. Based on the coordinated cooperation of the first outdoor fan 9 and the second outdoor fan 10, the purpose of flexibly controlling the heat dissipation of the outdoor heat exchanger can be achieved. In addition, it should be noted that since the refrigerant of the air conditioner is at the lower part of the compressor after throttling, turning on the second outdoor fan in this embodiment is more conducive to the evaporation of the refrigerant and absorption of heat than turning on the first outdoor fan.

[0056] It should be noted that the outdoor fan in this embodiment may be located on the same side of the outdoor heat exchanger 7 or on different sides of the outdoor heat exchanger 7, and this embodiment does not limit this.

[0057] based on Figure 2 The air conditioner shown in the figure proposes a control method of the air conditioner of the present invention, referring to Figure 3 , Figure 3 FIG. 1 is a flow chart of a first embodiment of a method for controlling an air conditioner according to the present invention.

[0058] The embodiment of the present invention provides an embodiment of a method for controlling an air conditioner. It should be noted that although a logical sequence is shown in the flow chart, in some cases, the steps shown or described may be executed in an order different from that shown here.

[0059] Specifically, the control method of the air conditioner in this embodiment includes:

[0060] Step S10: when the air conditioner is in the heating high-temperature steam washing stage, obtaining a first operating pressure of the air conditioner;

[0061] It should be noted that the execution subject of this embodiment is the above Figure 2 The air conditioner involved will not be described in detail in this embodiment.

[0062] In this step, when it is detected that the air conditioner switches from the previous cooling mode for frosting to the heating mode for defrosting, in order to avoid the air conditioner's allowable pressure being too high and causing the air conditioner to shut down due to high-pressure protection, it is necessary to obtain the air conditioner's operating pressure, so as to timely adjust the air conditioner's operating parameters according to the air conditioner's operating pressure, so as to prevent the air conditioner from shutting down due to high-pressure protection.

[0063] It should be noted that, in this embodiment, the operating pressure refers to the high pressure or low pressure of the air conditioner, wherein the high pressure or low pressure of the air conditioner can be converted into the operating pressure of the air conditioner by measuring the pipe temperature of the heat exchanger and combining it with the refrigerant parameters. For example, when the air conditioner is in heating mode, the temperature of the outdoor heat exchanger is measured and converted into the low-pressure operating pressure of the air conditioner by combining it with the refrigerant parameters, and the temperature of the indoor heat exchanger is measured and converted into the high-pressure operating pressure of the air conditioner by combining it with the refrigerant parameters. When the air conditioner is in cooling mode, the temperature of the indoor heat exchanger is measured and converted into the low-pressure operating pressure of the air conditioner by combining it with the refrigerant parameters, and the temperature of the outdoor heat exchanger is measured and converted into the high-pressure operating pressure of the air conditioner by combining it with the refrigerant parameters. In addition, a stop valve can be installed on the compressor return air pipe to obtain the pressure through the pressure gauge test on the stop valve, and this embodiment does not limit this.

[0064] It should be further explained that the first operating pressure in the present embodiment refers to the operating pressure measured during the operation of the air conditioner according to the set operating parameters during the heating high-temperature steam washing stage. Preferably, in the present embodiment, the operating pressure of the air conditioner is obtained when the four-way valve is switched to the heating state. It should be explained that when the air conditioner enters the heating high-temperature steam washing stage from the cooling and frosting stage, the compressor of the air conditioner enters the heating start-up stage. However, the four-way valve has a delayed start-up condition, which causes the four-way valve to be actually in the cooling state in the initial stage of the heating mode, thereby causing the indoor heat exchanger temperature to be in a falling stage. When the four-way valve is switched to the heating state, the refrigerant at the four-way valve collides in the opposite direction, and the indoor heat exchanger temperature rises slowly, thereby causing the pressure of the air conditioner to gradually increase, thereby causing the compressor to shut down. In order to avoid the air conditioner from shutting down due to high-pressure protection, the operating pressure of the air conditioner is obtained when the four-way valve is switched to the heating state, so that the air conditioner is timely regulated according to the operating pressure of the air conditioner.

[0065] In one embodiment, after the step of obtaining the operating pressure of the air conditioner when it is in the heating high-temperature steam washing stage, it also includes: when it is detected that the first operating pressure is less than or equal to the preset pressure threshold, the air conditioner is controlled to maintain operation in the current operating state, and when it is detected that the temperature of the indoor heat exchanger of the air conditioner reaches the preset temperature, the air conditioner is controlled to enter the high-temperature sterilization stage, that is, if the air conditioner does not have high-pressure pressure protection, the air conditioner is controlled to maintain the current operating state and continue to increase the temperature for high-temperature sterilization. It should be noted that maintaining the current operating state in this embodiment refers to that the operating frequency of the compressor of the air conditioner remains unchanged at the current operating frequency, and the outdoor fan at the outdoor heat exchanger of the air conditioner maintains the current operating speed.

[0066] Step S20: When it is detected that the first operating pressure is greater than a preset pressure threshold, adjusting the operating state of the outdoor fan of the air conditioner;

[0067] Specifically, the outdoor fan refers to the fan in the outdoor area of ​​the air conditioner, such as Figure 3 The first outdoor fan or the second outdoor fan shown in the figure, in addition, in this embodiment, the outdoor fan may also include Figure 3 Other outdoor fans other than those shown in the embodiment are not limited in this embodiment. Figure 3 The outdoor fan shown is used as a representative for explanation.

[0068] In this step, the outdoor heat exchanger is located at Figure 3 Between the exhaust port and the air intake port of the two outdoor fans shown (that is, the outdoor heat exchanger is located between the air intake port of the second outdoor fan and the exhaust port of the first outdoor fan), the air volume of the outdoor air flowing through the outdoor heat exchanger can be adjusted by adjusting the operating state of the outdoor fan to adjust the heat exchange capacity of the outdoor heat exchanger, thereby achieving the purpose of adjusting the operating pressure of the air conditioner.

[0069] Furthermore, in an application scenario, in order to improve the heat exchange efficiency, the air intake and air exhaust of the two outdoor fans are opposite to each other, and the outdoor heat exchanger is located between the air intake of the first outdoor fan and the air exhaust of the second outdoor fan, thereby forming a heat dissipation duct between the air intake of the second outdoor fan and the air exhaust of the first outdoor fan, and the outdoor heat exchanger is located on the heat dissipation duct, so that the air exhausted by the first outdoor fan can all flow through the heat dissipation duct under the action of the suction force of the second outdoor fan, thereby greatly improving the heat exchange efficiency of the outdoor heat exchanger.

[0070] It should be noted that the above-mentioned preset pressure threshold can be a pre-set fixed threshold, wherein the above-mentioned fixed threshold is any value within the high-pressure limit value range corresponding to when the high-pressure switch of the air conditioner is disconnected. This embodiment does not impose any restrictions on this. For example, when the preset pressure threshold is m, when it is detected that the operating pressure of the air conditioner reaches m, the outdoor fan of the air conditioner is immediately regulated.

[0071] It should be noted that the above-mentioned preset pressure threshold can also be a pre-set fixed threshold range, wherein any numerical value in the above-mentioned fixed threshold range is smaller than the high-pressure limit value corresponding to when the high-pressure switch of the air conditioner is disconnected. For example, when the preset pressure threshold is n to m, then in this embodiment, the outdoor fan of the air conditioner can be regulated when it is detected that the operating pressure of the air conditioner is in the range of n to m and continues for a period of time.

[0072] Furthermore, in order to avoid excessive heat exchange of the outdoor heat exchanger due to simultaneous adjustment of the two outdoor fans, in this embodiment, a stepwise adjustment method is adopted when adjusting the operating state of the outdoor fans. Specifically, the step S20 includes:

[0073] When it is detected that the first operating pressure is greater than a preset pressure threshold, the first outdoor fan of the air conditioner is controlled to stop running;

[0074] Obtaining a third operating pressure after the air conditioner has been running for a preset time in the adjusted outdoor fan operating state, and using the third operating pressure as a new first operating pressure;

[0075] If it is detected that the first operating pressure is greater than the preset pressure threshold, the second outdoor fan of the air conditioner is controlled to stop operating.

[0076] In this step, when it is detected that the air conditioner has high-pressure protection, in other words, when it is detected that the operating pressure of the air conditioner has reached a preset pressure threshold, the outdoor fan with the exhaust port of the outdoor fan facing the upper part of the outdoor heat exchanger can be stopped first to reduce the heat exchange at the upper part of the outdoor device. Then, after turning off the above-mentioned outdoor fan for a period of time, it is detected again whether the high-pressure protection still occurs. For example, after turning off the above-mentioned outdoor fan for 20S, it is detected again whether the high-pressure protection occurs. If the high-pressure protection occurs, the outdoor fan with the exhaust port of the outdoor fan facing the lower part of the outdoor heat exchanger continues to be stopped to reduce the heat exchange at the lower part of the outdoor device. If the high-pressure protection does not occur, the air conditioner is controlled to maintain the current operating state, and when it is detected that the temperature of the indoor heat exchanger of the air conditioner reaches the temperature for entering the high-temperature sterilization stage, the air conditioner is controlled to enter the high-temperature sterilization stage.

[0077] It should be further explained that when adjusting the operating state of the outdoor fan by adopting a gradual adjustment method, the outdoor fan with the exhaust port facing the lower part of the outdoor heat exchanger can be stopped first to reduce the heat exchange at the lower part of the outdoor device. Then, after shutting down the outdoor fan for a period of time, it is detected whether the high-pressure protection still occurs. For example, after shutting down the outdoor fan for 20S, it is detected whether the high-pressure protection occurs. If the high-pressure protection occurs, the outdoor fan with the exhaust port facing the upper part of the outdoor heat exchanger continues to be stopped to reduce the heat exchange at the upper part of the outdoor device. If the high-pressure protection does not occur, the air conditioner is controlled to maintain the current operating state, and when it is detected that the temperature of the indoor heat exchanger of the air conditioner reaches the temperature to enter the high-temperature sterilization stage, the air conditioner is controlled to enter the high-temperature sterilization stage.

[0078] In another embodiment, when the speeds of the outdoor fans at the outdoor heat exchanger of the air conditioner are different, the outdoor fan with a lower speed can be stopped first, and then after the outdoor fan is turned off for a period of time, it is detected whether the high-voltage protection still occurs. If the high-voltage protection occurs, the outdoor fan with a higher speed continues to be stopped. In this way, when the outdoor fan of the air conditioner is adjusted, the heat exchange fluctuation amplitude of the outdoor heat exchanger of the air conditioner is reduced, thereby maintaining the operating stability of the air conditioner.

[0079] Furthermore, when the air conditioner is performing high-temperature sterilization, the air conditioner operates in a heating mode. In order to make the high-temperature sterilization of the air conditioner meet the needs of users, after the air conditioner enters the high-temperature sterilization and operates in the heating mode for a period of time, the indoor heat exchanger temperature is obtained to determine whether the indoor heat exchanger temperature reaches the sterilization temperature range. If the indoor heat exchanger temperature reaches the sterilization temperature range, the air conditioner is controlled to maintain the current operating state. If the indoor heat exchanger temperature does not reach the sterilization temperature range, it is regulated according to the temperature range of the indoor heat exchanger temperature. For example, the sterilization of the air conditioner The sterilization temperature range is 56°C to 58°C. If the indoor heat exchanger temperature is 57°C, the air conditioner is controlled to maintain the current operating state. If the indoor heat exchanger temperature is 55°C, the outdoor heat exchanger temperature can be increased by reducing the indoor fan speed, or the compressor can be increased to increase the outdoor heat exchanger temperature. This embodiment does not limit this. If the indoor heat exchanger temperature is 59°C, the indoor fan speed can be increased to increase the outdoor heat exchanger temperature, or the compressor can be reduced to increase the outdoor heat exchanger temperature.

[0080] Step S30: obtaining a second operating pressure after the air conditioner has been running for a preset time in the adjusted outdoor fan operating state; and

[0081] Step S40: If it is detected that the second operating pressure is greater than a preset pressure threshold, the operating frequency of the compressor of the air conditioner is adjusted so that the air conditioner enters a high-temperature sterilization stage.

[0082] In this step, since the outdoor fan can only affect the heat exchange of the outdoor heat exchanger, that is, the outdoor fan has an indirect effect on the operating pressure of the air conditioner, the effect of adjusting the outdoor fan on the operating pressure is relatively weak. Therefore, in this embodiment, after stopping the outdoor fan, in order to avoid the high-pressure protection of the air conditioner caused by the failure of stopping the outdoor fan to effectively reduce the operating pressure of the air conditioner, it is detected whether the high-pressure protection still occurs after the outdoor fan is turned off for a period of time. For example, it is detected whether the high-pressure protection occurs after the outdoor fan is turned off for 20S. If the high-pressure protection occurs, the compressor is directly regulated to reduce the operating pressure of the air conditioner from the root, so that the air conditioner exits the high-pressure protection state, and then the air conditioner is maintained in the current operating state until it is detected that the air conditioner meets the conditions for entering the high-temperature sterilization stage, and the air conditioner is controlled to perform high-temperature sterilization. Specifically, the above step S40 in this embodiment includes:

[0083] If it is detected that the second operating pressure is greater than a preset pressure threshold, reducing the operating frequency of the compressor of the air conditioner;

[0084] obtaining a fourth operating pressure when the air conditioner operates with the adjusted compressor;

[0085] If it is detected that the fourth operating pressure is less than or equal to the preset pressure threshold, the air conditioner is controlled to maintain operation in the current operating state, and when it is detected that the indoor heat exchanger temperature of the air conditioner reaches the preset temperature, the air conditioner is controlled to enter the high-temperature sterilization stage.

[0086] Specifically, the second operating pressure refers to the operating pressure after the outdoor fan state of the air conditioner is adjusted, and the fourth operating pressure refers to the operating pressure after the compressor of the air conditioner is adjusted. Preferably, in this embodiment, the two operating pressures are the operating pressures of the air conditioner during stable operation.

[0087] In this step, when the compressor is adjusted, it is detected in real time whether the operating pressure of the air conditioner drops below the preset pressure threshold. If it is detected that the operating pressure of the air conditioner drops below the preset pressure threshold, the air conditioner is controlled to maintain the current operating state and continue to increase the temperature for high-temperature sterilization. It should be noted that, in this embodiment, maintaining the current operating state means that the operating frequency of the air conditioner compressor remains unchanged at the current operating frequency, and the outdoor fan at the outdoor heat exchanger of the air conditioner maintains the current operating speed.

[0088] It should be understood that the above is only an example and does not constitute any limitation to the technical solution of the present invention. Those skilled in the art can make settings based on needs in actual applications, and they are not listed one by one here.

[0089] In this embodiment, when the air conditioner is in the heating high-temperature steam washing stage, the outdoor fan state of the air conditioner and the operating frequency of the air conditioner compressor are adjusted according to the operating pressure of the air conditioner to reduce the operating pressure of the air conditioner, thereby allowing the air conditioner to enter the high-temperature sterilization stage.

[0090] Furthermore, based on the first embodiment of the control method of the air conditioner of the present invention, a second embodiment of the control method of the air conditioner of the present invention is proposed.

[0091] Reference Figure 4 , Figure 4 A schematic flow chart of a second embodiment of a method for controlling an air conditioner according to the present invention;

[0092] The difference between the second embodiment of the control method of the air conditioner and the first embodiment of the control method of the air conditioner is that after the above step S40, the method further includes:

[0093] Step S50: when the air conditioner is in the high-temperature sterilization stage, obtaining the temperature of the indoor heat exchanger of the air conditioner;

[0094] Step S60: if it is detected that the temperature of the indoor heat exchanger of the air conditioner is less than a first temperature threshold, the operating speed of the indoor fan of the air conditioner is reduced and / or the operating frequency of the compressor of the air conditioner is increased.

[0095] When the air conditioner is performing high-temperature sterilization, the air conditioner operates in heating mode. In order to make the high-temperature sterilization of the air conditioner meet user needs, after the air conditioner enters the high-temperature sterilization and runs in heating mode for a period of time, the indoor heat exchanger temperature is obtained. The indoor heat exchanger temperature is used to detect whether the high-temperature sterilization of the air conditioner meets user needs, that is, to determine whether the indoor heat exchanger temperature reaches the sterilization temperature range. When the indoor heat exchanger temperature does not reach the sterilization temperature range, the indoor heat exchanger temperature is adjusted by regulating the indoor fan and compressor.

[0096] Specifically, the first temperature threshold refers to the lower limit of the preset sterilization temperature range. For example, if the user presets the sterilization temperature range to 56°C to 58°C, the first temperature threshold is 56°C. If it is detected.

[0097] In this embodiment, if the temperature of the indoor heat exchanger reaches the sterilization temperature range, the air conditioner is controlled to maintain the current operating state. If the indoor heat exchanger temperature does not reach the sterilization temperature range, such as the sterilization temperature range of the air conditioner is 56°C to 58°C, if the indoor heat exchanger temperature is 55°C, the outdoor heat exchanger temperature can be increased by reducing the speed of the indoor fan, or by increasing the frequency of the compressor.

[0098] In this embodiment, the speed reduction of the indoor fan and the frequency increase of the compressor can be performed simultaneously, or can be performed step by step. For example, when the temperature of the indoor heat exchanger is lower than the lower limit of the preset sterilization temperature range, the speed of the indoor fan can be reduced first, and then after the speed of the indoor fan is reduced for a period of time, it is detected whether the sterilization temperature range is reached. If the sterilization temperature range is still not reached, the frequency of the compressor is increased again.

[0099] Furthermore, in this embodiment, the control range when reducing the speed of the indoor fan and increasing the frequency of the compressor is determined based on the indoor heat exchanger temperature. For example, when the lower limit of the preset sterilization temperature range is 56°C and the indoor heat exchanger temperature is 55°C, that is, the temperature difference between the indoor heat exchanger temperature and the lower limit of the preset sterilization temperature range is 1°C, which is within the first temperature range (0 to 3°C), then for the control of the indoor fan, the speed of the indoor fan can be reduced by 50rpm / min. For example, the current indoor fan runs at 200rpm / min, and the indoor fan is adjusted to 150rpm / min. For the control of the compressor, the compressor frequency can be increased by 1. 0HZ, for example, the current compressor frequency runs at 60HZ, then adjust the compressor to 70HZ to run. When the indoor heat exchanger temperature is 50℃, that is, the temperature difference between the indoor heat exchanger temperature and the lower limit of the preset sterilization temperature range is 6℃, which is in the second temperature range (4 to 6℃). For the regulation of the indoor fan, the speed of the indoor fan can be reduced by 100rpm / min. For example, the current indoor fan runs at 580rpm / min, then adjust the indoor fan to 480rpm / min. For the regulation of the compressor, the frequency of the compressor can be increased by 20HZ. For example, the current compressor frequency runs at 50HZ, then adjust the compressor to 70HZ.

[0100] Furthermore, in this embodiment, the control range when reducing the speed of the indoor fan and increasing the frequency of the compressor is determined based on the number of times the indoor heat exchanger temperature does not reach the sterilization temperature range. For example, after the air conditioner enters the heating mode and starts high-temperature sterilization, if it is detected for the first time that the sterilization temperature range is not reached, the indoor fan speed is reduced by 50rpm / min. After the first adjustment of the indoor fan speed, if it is detected that the sterilization temperature range is still not reached, the indoor fan speed is reduced by 100rpm / min. For the control of the compressor, if it is detected for the first time that the sterilization temperature range is not reached, the compressor frequency is increased by 10HZ. After the first adjustment of the compressor, if it is detected that the sterilization temperature range is still not reached, the compressor frequency is increased by 20HZ.

[0101] In another application scenario, after the above step S50, it also includes: if it is detected that the temperature of the indoor heat exchanger of the air conditioner is greater than a second temperature threshold, the operating speed of the indoor fan of the air conditioner is increased and / or the operating frequency of the compressor of the air conditioner is reduced.

[0102] Specifically, the first temperature threshold refers to the upper limit of the preset sterilization temperature range. For example, if the sterilization temperature range preset by the user is 56° C. to 58° C., the second temperature threshold is 58° C.

[0103] In this embodiment, if the temperature of the indoor heat exchanger reaches the sterilization temperature range, the air conditioner is controlled to maintain the current operating state. If the temperature of the indoor heat exchanger does not reach the sterilization temperature range, such as the sterilization temperature range of the air conditioner is 56°C to 58°C, if the indoor heat exchanger temperature is 58°C, the indoor fan speed can be increased to reduce the heat delivered from the outdoor heat exchanger to the indoor heat exchanger, or the compressor can be reduced to reduce the heat delivered from the outdoor heat exchanger to the indoor heat exchanger.

[0104] In this embodiment, the speed-up of the indoor fan and the frequency-down of the compressor can be performed simultaneously or gradually. For example, when the temperature of the indoor heat exchanger is greater than the lower limit of the preset sterilization temperature range, the speed of the indoor fan can be increased first, and then after the speed-up of the indoor fan is increased for a period of time, it is detected whether the sterilization temperature range is reached. If the sterilization temperature range is still not reached, the frequency of the compressor is reduced again.

[0105] Furthermore, in this embodiment, the control range when increasing the speed of the indoor fan and reducing the frequency of the compressor is determined based on the indoor heat exchanger temperature. For example, when the upper limit of the preset sterilization temperature range is 58°C and the indoor heat exchanger temperature is 60°C, that is, the temperature difference between the indoor heat exchanger temperature and the upper limit of the preset sterilization temperature range is 2°C, which is within the first temperature range (0 to 3°C). For the control of the indoor fan, the speed of the indoor fan can be increased by 50rpm / min. For example, the current indoor fan runs at 200rpm / min, and the indoor fan is adjusted to 250rpm / min. For the control of the compressor, the compressor frequency can be reduced by 1. 0HZ, for example, the current compressor frequency runs at 60HZ, then adjust the compressor to 50HZ to run. When the indoor heat exchanger temperature is 63°C, that is, the temperature difference between the indoor heat exchanger temperature and the upper limit value of the preset sterilization temperature range is 5°C, which is in the second temperature range (4 to 6°C). For the regulation of the indoor fan, the speed of the indoor fan can be increased by 100rpm / min. For example, the current indoor fan runs at 70rpm / min, then adjust the indoor fan to 170rpm / min. For the regulation of the compressor, the frequency of the compressor can be reduced by 20HZ. For example, the current compressor frequency runs at 50HZ, then adjust the compressor to 30HZ to run.

[0106] Furthermore, in this embodiment, the regulation range when increasing the indoor fan speed and reducing the compressor frequency is determined based on the number of times the indoor heat exchanger temperature does not reach the sterilization temperature range. For example, after the air conditioner enters the heating mode and starts high-temperature sterilization, if it is detected for the first time that the sterilization temperature range is not reached, the indoor fan speed is increased by 50rpm / min. After the first adjustment of the indoor fan speed, if it is detected that the sterilization temperature range is still not reached, the indoor fan speed is increased by 100rpm / min. For the control of the compressor, if it is detected for the first time that the sterilization temperature range is not reached, the compressor frequency is reduced by 10HZ. After the first adjustment of the compressor, if it is detected that the sterilization temperature range is still not reached, the compressor frequency is reduced by 20HZ.

[0107] In this embodiment, when the air conditioner is in the high-temperature sterilization stage, the heat exchange amount of the outdoor heat exchanger is changed by adjusting the indoor fan speed, thereby indirectly changing the heat delivered to the indoor heat exchanger, or by adjusting the compressor frequency, thereby directly changing the heat delivered to the indoor heat exchanger, thereby making the indoor heat exchanger temperature reach the sterilization temperature range and meet the high-temperature sterilization requirements.

[0108] Furthermore, based on the first embodiment of the control method of the air conditioner of the present invention, a third embodiment of the control method of the air conditioner of the present invention is proposed.

[0109] Reference Figure 4 , Figure 4 A schematic flow chart of a third embodiment of a method for controlling an air conditioner according to the present invention;

[0110] The difference between the third embodiment of the control method of the air conditioner and the first embodiment of the control method of the air conditioner is that before the above step S10, it further includes:

[0111] Step S101: upon receiving a cleaning instruction, controlling the air conditioner to enter a condensed water production stage;

[0112] Step S102: when it is detected that the operating parameter of the air conditioner in the condensing water production stage reaches a first preset operating parameter condition, controlling the air conditioner to enter the refrigeration and frosting stage;

[0113] Step S103: when it is detected that the operating parameter of the air conditioner in the condensing water production stage reaches a second preset operating parameter condition, controlling the air conditioner to enter a cooling standby state;

[0114] Step S104: when it is detected that the operating pressure difference of the air conditioner reaches a preset pressure difference, the air conditioner is controlled to enter a heating high-temperature steam washing stage.

[0115] Specifically, the preset operating parameter may be the operating time, for example, the air conditioner runs in cooling mode for 10 minutes or 20 minutes, etc., and may also be the indoor heat exchanger temperature, which is not limited in this embodiment.

[0116] In this embodiment, in some application scenarios, the air conditioner has an intelligent cleaning function. When the user turns on the intelligent cleaning function, the air conditioner first operates in a cooling mode for a period of time to generate condensed water on the surface of the indoor heat exchanger. Then, after the air conditioner runs in this stage and reaches the preset operating parameters, the air conditioner enters the cooling and frosting stage from the cooling and condensing stage to quickly frost the surface of the indoor heat exchanger, thereby separating the bacteria or dust on the surface of the indoor heat exchanger from the surface of the indoor heat exchanger when the water on the surface of the indoor heat exchanger condenses into a frost layer. It should be further noted that when the air conditioner is frosting, the indoor unit can be slowed down to increase the frosting speed.

[0117] It should be noted that, in this embodiment, the above-mentioned operating pressure difference refers to the pressure difference between the high pressure and the low pressure of the air conditioner, wherein the high pressure or low pressure of the air conditioner can be converted into the operating pressure of the air conditioner by measuring the pipe temperature of the heat exchanger and combining it with the refrigerant parameters. For example, when the air conditioner is in heating mode, the temperature of the outdoor heat exchanger is measured and converted into the low pressure of the air conditioner by combining it with the refrigerant parameters, and the temperature of the indoor heat exchanger is measured and converted into the high pressure of the air conditioner by combining it with the refrigerant parameters. When the air conditioner is in cooling mode, the temperature of the indoor heat exchanger is measured and converted into the low pressure of the air conditioner by combining it with the refrigerant parameters, and the temperature of the outdoor heat exchanger is measured and converted into the high pressure of the air conditioner by combining it with the refrigerant parameters. In addition, a stop valve can be installed on the compressor return air pipe to obtain the pressure through the pressure gauge test on the stop valve, and this embodiment does not limit this.

[0118] It is worth noting that in this embodiment, in order to make the air conditioner enter the high-temperature sterilization stage, after the air conditioner runs in refrigeration and frosting mode for a period of time, the air conditioner runs in refrigeration standby mode for a period of time, until the pressure difference between the high pressure and the low pressure of the air conditioner reaches within the set pressure difference range, and then heating and defrosting are performed.

[0119] It should be understood that the above is only an example and does not constitute any limitation to the technical solution of the present invention. Those skilled in the art can make settings based on needs in actual applications, and they are not listed one by one here.

[0120] In this embodiment, before the air conditioner enters the heating and defrosting stage, it first runs in the condensation stage and the frosting stage for a period of time in sequence, so that the bacteria or dust on the surface of the indoor heat exchanger will be separated from the surface of the indoor heat exchanger when the water on the surface of the indoor heat exchanger condenses into a frost layer. Then it runs in the cooling standby mode for a period of time until the pressure difference between the high pressure and the low pressure of the air conditioner reaches the set pressure difference range, and then heating and defrosting are performed, thereby avoiding the air conditioner from shutting down due to protection.

[0121] In addition, this embodiment also provides a control device for an air conditioner. Figure 5 , Figure 5 Schematic diagram of functional modules of an embodiment of a control device for an air conditioner according to the present invention.

[0122] Specifically, refer to Figure 5 , the control device of the air conditioner comprises:

[0123] The first acquisition module 100 is used to acquire the first operating pressure of the air conditioner when the air conditioner is in the heating high-temperature steam washing stage;

[0124] When it is detected that the air conditioner switches from the previous cooling mode for frosting to the heating mode for defrosting, in order to avoid the air conditioner's allowable pressure being too high and causing the air conditioner to shut down due to high-pressure protection, it is necessary to obtain the air conditioner's operating pressure so as to adjust the air conditioner's operating parameters in time according to the air conditioner's operating pressure conditions, so as to prevent the air conditioner from shutting down due to high-pressure protection.

[0125] It should be noted that, in this embodiment, the operating pressure refers to the high pressure or low pressure of the air conditioner, wherein the high pressure or low pressure of the air conditioner can be converted into the operating pressure of the air conditioner by measuring the pipe temperature of the heat exchanger and combining it with the refrigerant parameters. For example, when the air conditioner is in heating mode, the temperature of the outdoor heat exchanger is measured and converted into the low-pressure operating pressure of the air conditioner by combining it with the refrigerant parameters, and the temperature of the indoor heat exchanger is measured and converted into the high-pressure operating pressure of the air conditioner by combining it with the refrigerant parameters. When the air conditioner is in cooling mode, the temperature of the indoor heat exchanger is measured and converted into the low-pressure operating pressure of the air conditioner by combining it with the refrigerant parameters, and the temperature of the outdoor heat exchanger is measured and converted into the high-pressure operating pressure of the air conditioner by combining it with the refrigerant parameters. In addition, a stop valve can be installed on the compressor return air pipe to obtain the pressure through the pressure gauge test on the stop valve, and this embodiment does not limit this.

[0126] It should be further explained that the first operating pressure in the present embodiment refers to the operating pressure measured during the operation of the air conditioner according to the set operating parameters of the heating high-temperature steam washing stage. Preferably, in the present embodiment, the operating pressure of the air conditioner is obtained when the four-way valve is switched to the heating state. It should be explained that when the air conditioner enters the heating high-temperature steam washing stage from the cooling and frosting stage, the compressor of the air conditioner enters the heating start-up stage. However, the four-way valve has a delayed start-up condition, which causes the four-way valve to be actually in the cooling state in the initial stage of the heating mode, thereby causing the indoor heat exchanger temperature to be in a falling stage. When the four-way valve is switched to the heating state, the refrigerant at the four-way valve collides in the opposite direction, and the indoor heat exchanger temperature rises slowly, thereby causing the pressure of the air conditioner to gradually increase, thereby causing the compressor to shut down. In order to avoid the air conditioner from shutting down due to high-pressure protection, the operating pressure of the air conditioner is obtained when the four-way valve is switched to the heating state, so that the air conditioner is timely regulated according to the operating pressure of the air conditioner.

[0127] In one embodiment, after the step of obtaining the operating pressure of the air conditioner when it is in the heating high-temperature steam washing stage, it also includes: when it is detected that the first operating pressure is less than or equal to the preset pressure threshold, the air conditioner is controlled to maintain operation in the current operating state, and when it is detected that the temperature of the indoor heat exchanger of the air conditioner reaches the preset temperature, the air conditioner is controlled to enter the high-temperature sterilization stage, that is, if the air conditioner does not have high-pressure pressure protection, the air conditioner is controlled to maintain the current operating state and continue to increase the temperature for high-temperature sterilization. It should be noted that maintaining the current operating state in this embodiment refers to that the operating frequency of the compressor of the air conditioner remains unchanged at the current operating frequency, and the outdoor fan at the outdoor heat exchanger of the air conditioner maintains the current operating speed.

[0128] A first adjustment module 200, configured to adjust the operating state of the outdoor fan of the air conditioner when it is detected that the first operating pressure is greater than a preset pressure threshold;

[0129] Specifically, the outdoor fan refers to the fan in the outdoor area of ​​the air conditioner, such as Figure 3 The first outdoor fan or the second outdoor fan shown in the figure, in addition, in this embodiment, the outdoor fan may also include Figure 3 Other outdoor fans other than those shown in the embodiment are not limited in this embodiment. Figure 3 The outdoor fan shown is used as a representative for explanation.

[0130] In this step, the outdoor heat exchanger is located at Figure 3Between the exhaust port and the air intake port of the two outdoor fans shown (that is, the outdoor heat exchanger is located between the air intake port of the second outdoor fan and the exhaust port of the first outdoor fan), the air volume of the outdoor air flowing through the outdoor heat exchanger can be adjusted by adjusting the operating state of the outdoor fan to adjust the heat exchange capacity of the outdoor heat exchanger, thereby achieving the purpose of adjusting the operating pressure of the air conditioner.

[0131] Furthermore, in an application scenario, in order to improve the heat exchange efficiency, the air intake and air exhaust of the two outdoor fans are opposite to each other, and the outdoor heat exchanger is located between the air intake of the first outdoor fan and the air exhaust of the second outdoor fan, thereby forming a heat dissipation duct between the air intake of the second outdoor fan and the air exhaust of the first outdoor fan, and the outdoor heat exchanger is located on the heat dissipation duct, so that the air exhausted by the first outdoor fan can all flow through the heat dissipation duct under the action of the suction force of the second outdoor fan, thereby greatly improving the heat exchange efficiency of the outdoor heat exchanger.

[0132] It should be noted that the above-mentioned preset pressure threshold can be a pre-set fixed threshold, wherein the above-mentioned fixed threshold is any value within the high-pressure limit value range corresponding to when the high-pressure switch of the air conditioner is disconnected. This embodiment does not impose any restrictions on this. For example, when the preset pressure threshold is m, when it is detected that the operating pressure of the air conditioner reaches m, the outdoor fan of the air conditioner is immediately regulated.

[0133] It should be noted that the above-mentioned preset pressure threshold can also be a pre-set fixed threshold range, wherein any numerical value in the above-mentioned fixed threshold range is smaller than the high-pressure limit value corresponding to when the high-pressure switch of the air conditioner is disconnected. For example, when the preset pressure threshold is n to m, then in this embodiment, the outdoor fan of the air conditioner can be regulated when it is detected that the operating pressure of the air conditioner is in the range of n to m and continues for a period of time.

[0134] The second acquisition module 300 is used to acquire the second operating pressure of the air conditioner after the air conditioner has been operated for a preset time in the adjusted outdoor fan operating state; and

[0135] The second adjustment module 400 is used to adjust the operating frequency of the compressor of the air conditioner if it is detected that the second operating pressure is greater than a preset pressure threshold, so that the air conditioner enters a high-temperature sterilization stage.

[0136] Since the outdoor fan can only affect the heat exchange rate of the outdoor heat exchanger, that is, the outdoor fan has an indirect impact on the operating pressure of the air conditioner, the effect of adjusting the outdoor fan on the operating pressure is relatively weak. Therefore, in this embodiment, after stopping the outdoor fan, in order to avoid the situation where stopping the outdoor fan cannot effectively reduce the operating pressure of the air conditioner, resulting in high-pressure protection of the air conditioner, the outdoor fan is turned off for a period of time and then a check is made to see whether the high-pressure protection still occurs. For example, the outdoor fan is turned off for 20S and then a check is made to see whether the high-pressure protection occurs. If the high-pressure protection occurs, the compressor is directly regulated to reduce the operating pressure of the air conditioner from the source, so that the air conditioner exits the high-pressure protection state, and then the air conditioner is maintained in the current operating state until it is detected that the air conditioner meets the conditions for entering the high-temperature sterilization stage, and the air conditioner is controlled to perform high-temperature sterilization.

[0137] When the compressor is adjusted, it is detected in real time whether the operating pressure of the air conditioner drops below the preset pressure threshold. If it is detected that the operating pressure of the air conditioner drops below the preset pressure threshold, the air conditioner is controlled to maintain the current operating state and continue to increase the temperature for high-temperature sterilization. It should be noted that, in this embodiment, maintaining the current operating state means that the operating frequency of the air conditioner compressor remains unchanged at the current operating frequency, and the outdoor fan at the outdoor heat exchanger of the air conditioner maintains the current operating speed.

[0138] In this embodiment, when the air conditioner is in the heating high-temperature steam washing stage, the outdoor fan state of the air conditioner and the operating frequency of the air conditioner compressor are adjusted according to the operating pressure of the air conditioner to reduce the operating pressure of the air conditioner, thereby allowing the air conditioner to enter the high-temperature sterilization stage.

[0139] In addition, an embodiment of the present invention further provides a computer storage medium, on which a control program for an air conditioner is stored. When the control program for the air conditioner is executed by a processor, the steps of the control method for the air conditioner as described above are implemented, which will not be repeated here.

[0140] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0141] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0142] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present invention.

[0143] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The method comprises: When the air conditioner is in a heating high-temperature steam washing stage, obtaining a first operating pressure of the air conditioner; When it is detected that the first operating pressure is greater than a preset pressure threshold, controlling the first outdoor fan of the air conditioner to stop operating; Acquire a third operating pressure after the air conditioner has been running for a preset time in the adjusted outdoor fan operating state, and use the third operating pressure as a new first operating pressure; If it is detected that the first operating pressure is greater than a preset pressure threshold, the second outdoor fan of the air conditioner is controlled to stop running, wherein the first outdoor fan and the second outdoor fan are both fans arranged at the outdoor heat exchanger of the air conditioner; Acquire a second operating pressure after the air conditioner has been running for a preset time in the adjusted outdoor fan operating state; If it is detected that the second operating pressure is greater than a preset pressure threshold, reducing the operating frequency of the compressor of the air conditioner; obtaining a fourth operating pressure when the air conditioner operates with the adjusted compressor; If it is detected that the fourth operating pressure is less than or equal to the preset pressure threshold, the air conditioner is controlled to maintain operation in the current operating state, and when it is detected that the indoor heat exchanger temperature of the air conditioner reaches the preset temperature, the air conditioner is controlled to enter the high-temperature sterilization stage.

2. The air conditioner control method according to claim 1, characterized in that: After the step of adjusting the operating frequency of the compressor of the air conditioner if it is detected that the second operating pressure is greater than a preset pressure threshold so that the air conditioner enters a high temperature sterilization stage, the method further includes: When the air conditioner is in a high-temperature sterilization stage, obtaining the temperature of the indoor heat exchanger of the air conditioner; If it is detected that the temperature of the indoor heat exchanger of the air conditioner is less than a first temperature threshold, the operating speed of the indoor fan of the air conditioner is reduced and / or the operating frequency of the compressor of the air conditioner is increased.

3. The air conditioner control method according to claim 2, characterized in that: After the step of obtaining the temperature of the indoor heat exchanger of the air conditioner, the method further includes: If it is detected that the temperature of the indoor heat exchanger of the air conditioner is greater than a second temperature threshold, the operating speed of the indoor fan of the air conditioner is increased and / or the operating frequency of the compressor of the air conditioner is reduced.

4. The air conditioner control method according to claim 1, characterized in that: After the step of obtaining the first operating pressure of the air conditioner when the air conditioner is in the heating high-temperature steam washing stage, the method further includes: When it is detected that the first operating pressure is less than or equal to a preset pressure threshold, the air conditioner is controlled to maintain operation in the current operating state, and when it is detected that the indoor heat exchanger temperature of the air conditioner reaches a preset temperature, the air conditioner is controlled to enter a high-temperature sterilization stage.

5. The air conditioner control method according to any one of claims 1 to 4, characterized in that: Before the step of obtaining the first operating pressure of the air conditioner when the air conditioner is in the heating high-temperature steam washing stage, the step further includes: When receiving a cleaning instruction, controlling the air conditioner to enter a condensing water production stage; When it is detected that the operating parameter of the air conditioner in the condensing water production stage reaches a first preset operating parameter condition, controlling the air conditioner to enter the refrigeration and frosting stage; When it is detected that the operating parameter of the air conditioner in the condensing water production stage reaches a second preset operating parameter condition, controlling the air conditioner to enter a cooling standby state; When it is detected that the operating pressure difference of the air conditioner reaches a preset pressure difference, the air conditioner is controlled to enter a heating high-temperature steam washing stage.

6. A control device for an air conditioner, characterized in that: The control device of the air conditioner comprises: A first acquisition module, used for acquiring a first operating pressure of the air conditioner when the air conditioner is in a heating high-temperature steam washing stage; A first adjustment module is used to control the first outdoor fan of the air conditioner to stop running when it is detected that the first operating pressure is greater than a preset pressure threshold; obtain a third operating pressure after the air conditioner runs for a preset time in the adjusted outdoor fan operating state, and use the third operating pressure as a new first operating pressure; and control the second outdoor fan of the air conditioner to stop running when it is detected that the first operating pressure is greater than a preset pressure threshold, wherein both the first outdoor fan and the second outdoor fan are fans arranged at the outdoor heat exchanger of the air conditioner; A second acquisition module is used to acquire a second operating pressure after the air conditioner has been running for a preset time in the adjusted outdoor fan operating state; and The second adjustment module is used to reduce the operating frequency of the compressor of the air conditioner when it is detected that the second operating pressure is greater than a preset pressure threshold; obtain a fourth operating pressure when the air conditioner is operating with the adjusted compressor; when it is detected that the fourth operating pressure is less than or equal to the preset pressure threshold, control the air conditioner to maintain operation in the current operating state; and when it is detected that the temperature of the indoor heat exchanger of the air conditioner reaches a preset temperature, control the air conditioner to enter a high-temperature sterilization stage.

7. An air conditioner, characterized in that: The air conditioner comprises a processor, a memory and a control program of the air conditioner stored in the memory. When the control program of the air conditioner is executed by the processor, the steps of the control method of the air conditioner as described in any one of claims 1 to 5 are implemented.

8. A computer storage medium, characterized in that: The computer storage medium stores a control program of the air conditioner, and when the control program of the air conditioner is executed by the processor, the steps of the control method of the air conditioner as claimed in any one of claims 1 to 5 are implemented.

Images