WO2023206756A1 - Method for preventing deposition of liquid refrigerant, apparatus for preventing deposition of liquid refrigerant, and air conditioner - Google Patents

Abstract

A method for preventing deposition of a liquid refrigerant, an apparatus (10) for preventing deposition of a liquid refrigerant, and an air conditioner. The method comprises: during the cooling operation of an air conditioner, obtaining a compressor operation frequency and an outdoor ambient temperature; when determining, according to the compressor operation frequency and the outdoor ambient temperature, that the air conditioner satisfies a low-frequency operation condition, determining evaporator temperature information, and when determining, according to the evaporator temperature information, that the air conditioner satisfies an evaporator frosting condition, reducing the rotating speed of an outdoor fan and increasing the compressor operation frequency at the same time.

Description

Liquid refrigerant deposition prevention method, liquid refrigerant deposition prevention device and air conditioner

Cross-references to related applications

This application requires priority for the Chinese patent application number "202210476360.3" submitted by "Guangdong Midea Refrigeration Equipment Co., Ltd." on April 29, 2022, titled "Method for preventing liquid refrigerant deposition, device for preventing liquid refrigerant deposition, and air conditioner" right.

Technical field

The present application relates to the field of air conditioners, and in particular, to a method for preventing liquid refrigerant deposition, a device for preventing liquid refrigerant deposition, an air conditioner, an air conditioner controller, and a computer-readable storage medium.

Background technique

Among related technologies, variable frequency air conditioners are widely used and have significant energy-saving effects. A major advantage of inverter air conditioners is that when the temperature is close to the set temperature, the inverter air conditioner can automatically reduce the operating frequency, continue to output cooling capacity at a lower frequency, and maintain a constant indoor temperature.

When the inverter air conditioner operates at low frequency, it is important to ensure the reliability of the entire machine and its constant output capability. During the development and design process of inverter air conditioners, combined with feedback from users in the market, it was found that some inverter air conditioners have weak output capabilities when operating at low frequencies, and the vapor-liquid flow in the evaporator is biased, resulting in the distribution of cold and heat in different parts of the evaporator. Uneven, leading to frost on the indoor unit. After a large number of experiments, it has been verified that when the inverter air conditioner operates at low frequency, due to the large system size, a large amount of liquid refrigerant will be deposited at the bottom of the condenser of the outdoor unit during long-term low-frequency operation, causing the overall refrigerant flow of the inverter air conditioner to become disordered. This in turn affects the low-frequency output capability of the inverter air conditioner and the diversion of refrigerant in the indoor unit.

Contents of the invention

The present application aims to solve, at least to a certain extent, one of the technical problems in the related art. To this end, one purpose of this application is to propose a method for preventing liquid refrigerant deposition, which can prevent liquid refrigerant from being deposited at the bottom of the condenser of the outdoor unit, avoid biased flow of vapor-liquid splitting in the evaporator, and ensure that the evaporator The cold and heat are evenly distributed in different parts, thus effectively preventing the evaporator from frosting.

This application further proposes a device for preventing liquid refrigerant deposition.

This application further proposes an air conditioner.

This application further proposes an air conditioner controller.

This application further proposes a computer-readable storage medium.

The method for preventing liquid refrigerant deposition according to the present application is used in air conditioners. The method includes:

When the air conditioner is running for cooling, obtain the compressor operating frequency and outdoor ambient temperature;

When it is determined that the air conditioner meets the low-frequency operation condition based on the compressor operating frequency and the outdoor ambient temperature, evaporator temperature information is determined, and when it is determined that the air conditioner meets the evaporator frosting condition based on the evaporator temperature information, At the same time, the outdoor fan speed is reduced and the compressor operating frequency is increased.

According to the liquid refrigerant deposition prevention method of the present application, during the refrigeration operation of the air conditioner, when it is determined that the air conditioner meets the low-frequency operation conditions based on the compressor operating frequency and the outdoor ambient temperature, the evaporator temperature information is determined, and the air conditioner is determined based on the evaporator temperature information. When the evaporator frosting conditions are met, reducing the outdoor fan speed and increasing the compressor operating frequency can prevent liquid refrigerant from depositing at the bottom of the condenser of the outdoor unit, avoid biased flow of vapor and liquid in the evaporator, and ensure the distribution of heat and cold in different parts of the evaporator. Uniform, thereby effectively preventing evaporator frosting, thereby improving the air conditioner's capacity output at low frequencies.

In some examples of this application, it is determined that the air conditioner meets low-frequency operation conditions based on the compressor operating frequency and outdoor ambient temperature, including:

When the compressor operating frequency is less than the first preset frequency threshold and the outdoor ambient temperature is less than the first preset temperature, it is determined that the air conditioner meets the low-frequency operation condition.

In some examples in this application, evaporator temperature information is determined, including:

The evaporator temperature is obtained every preset time, and the evaporator temperature change rate is determined based on the evaporator temperature obtained every preset time.

In some examples of this application, determining that the air conditioner meets evaporator frosting conditions based on the evaporator temperature information includes:

When the currently acquired evaporator temperature is greater than or equal to the last acquired evaporator temperature, or the evaporator temperature change rate is less than or equal to the first set value, if the currently acquired evaporator temperature is less than the second preset temperature, then determine The air conditioner meets evaporator frosting conditions.

In some examples of this application, after determining the evaporator temperature information, the method further includes:

When the currently obtained evaporator temperature is less than the last obtained evaporator temperature and the evaporator temperature change rate is greater than the first set value, the outdoor fan speed is reduced.

In some examples of this application, after reducing the outdoor fan speed, the method further includes:

If the evaporator temperature change rate becomes stable, the outdoor fan is controlled to keep the current operating speed unchanged;

If the evaporator temperature change rate is greater than the first set value, or the currently obtained evaporator temperature is less than the second preset temperature, the compressor operating frequency is increased.

In some examples of this application, the outdoor fan speed is reduced and the compressor operating frequency is increased at the same time, including:

The rotation speed of the outdoor fan is reduced according to a preset step size, and the operating frequency of the compressor is increased to a second preset frequency threshold, where the second preset frequency threshold is greater than the first preset frequency threshold.

In some examples of this application, after reducing the outdoor fan speed according to a preset step, the method further includes:

If the evaporator temperature change rate is less than or equal to the first set value and the currently obtained evaporator temperature is greater than or equal to the second preset temperature, the outdoor fan is controlled to keep the current operating speed unchanged;

If the evaporator temperature change rate is greater than the first set value, or the currently obtained evaporator temperature is less than the second preset temperature, continue to reduce the outdoor fan speed according to the preset step size until the outdoor fan speed reaches Preset minimum speed.

The liquid refrigerant deposition prevention device according to the present application is used in air conditioners, and the device includes:

An acquisition module, used to acquire the compressor operating frequency and outdoor ambient temperature when the air conditioner is running for cooling;

A control module configured to determine evaporator temperature information when it is determined that the air conditioner meets the low-frequency operating conditions based on the compressor operating frequency and outdoor ambient temperature, and determine that the air conditioner meets the evaporator temperature information based on the evaporator temperature information. During frost conditions, simultaneously reduce the outdoor fan speed and increase the compressor operating frequency.

According to the liquid refrigerant deposition prevention device of the present application, during the refrigeration operation of the air conditioner, the acquisition module acquires the compressor operating frequency and outdoor ambient temperature, and the acquisition module transmits the acquired compressor operating frequency and outdoor ambient temperature information to the control module, and controls When the module determines that the air conditioner meets the low-frequency operating conditions based on the compressor operating frequency and outdoor ambient temperature, it determines the evaporator temperature information. When the control module determines that the air conditioner meets the evaporator frosting conditions based on the evaporator temperature information, the control module controls the air conditioner to lower the outdoor temperature. Increasing the fan speed and increasing the operating frequency of the compressor can prevent liquid refrigerant from depositing at the bottom of the condenser of the outdoor unit, avoid biased flow of vapor and liquid in the evaporator, and ensure uniform distribution of cold and heat in different parts of the evaporator, thereby effectively preventing frost on the evaporator. This further improves the air conditioner's capacity output at low frequencies.

The air conditioner according to this application includes:

Compressor, evaporator, condenser and throttling element, the condenser includes a plurality of pipeline assemblies, each of the pipeline assemblies includes a first group of pipelines and a second group of pipelines, the first group The pipeline has a plurality of first pipelines, and a plurality of the first pipelines are connected in series to form a first refrigerant flow path, and the second group of pipelines has a plurality of second pipelines and a plurality of third pipelines, A plurality of the second pipelines are connected in series to form a second refrigerant flow path and a plurality of the second pipelines are arranged in a first row. A plurality of the third pipelines are connected in series to form a third refrigerant flow path and a plurality of the second pipelines are arranged in a first row. The third pipelines are arranged in a second row. One of the second pipelines in the first row is located at the end and the third pipeline in the second row is far away from it. A third pipeline is connected to connect the second refrigerant flow path and the third refrigerant flow path in series;

A controller configured to obtain the operating frequency of the compressor and the outdoor ambient temperature when the air conditioner is running for cooling, and determine the evaporator when the air conditioner meets the low-frequency operating conditions based on the compressor operating frequency and the outdoor ambient temperature. temperature information, and when it is determined that the air conditioner meets the evaporator frosting condition based on the evaporator temperature information, the outdoor fan speed is reduced and the compressor operating frequency is increased at the same time.

According to the air conditioner of the present application, during the refrigeration operation of the air conditioner, the compressor operating frequency and the outdoor ambient temperature are obtained. When it is determined that the air conditioner meets the low-frequency operation conditions based on the compressor operating frequency and the outdoor ambient temperature, the evaporator temperature information is determined. When the evaporator temperature information determines that the air conditioner meets the conditions for evaporator frosting, the air conditioner is controlled to reduce the outdoor fan speed and increase the compressor operating frequency, which can prevent liquid refrigerant from depositing at the bottom of the condenser of the outdoor unit and avoid vapor-liquid diversion in the evaporator. Bias flow ensures uniform distribution of cold and heat in different parts of the evaporator, thereby effectively preventing frost on the evaporator and thereby improving the air conditioner's capacity output at low frequencies.

The air conditioner controller according to the present application includes a memory, a processor, and an anti-liquid refrigerant deposition program stored in the memory and executable on the processor. When the processor executes the anti-liquid refrigerant deposition program, the above-mentioned steps are implemented. Methods to prevent liquid refrigerant deposition.

According to the air conditioner controller of the present application, when the processor executes the liquid refrigerant deposition prevention program, during the refrigeration operation of the air conditioner, the evaporator temperature information is determined when the air conditioner meets the low-frequency operation conditions based on the compressor operating frequency and outdoor ambient temperature. , when it is determined based on the evaporator temperature information that the air conditioner meets the evaporator frosting conditions, reducing the outdoor fan speed and increasing the compressor operating frequency can prevent liquid refrigerant from depositing at the bottom of the condenser of the outdoor unit and avoid deviation of the vapor-liquid split in the evaporator. , ensuring uniform distribution of cold and heat in different parts of the evaporator, thereby effectively preventing the evaporator from frosting, thereby improving the air conditioner's capacity output at low frequencies.

According to the computer-readable storage medium of the present application, an anti-liquid refrigerant deposition program is stored thereon, and when the anti-liquid refrigerant deposition program is executed by the processor, the above-mentioned anti-liquid refrigerant deposition method is implemented.

According to the computer-readable storage medium of the present application, when the liquid refrigerant deposition prevention program is executed by the processor, during the refrigeration operation of the air conditioner, when it is determined that the air conditioner meets the low-frequency operation conditions based on the compressor operating frequency and the outdoor ambient temperature, the evaporator is determined Temperature information, based on the evaporator temperature information, when it is determined that the air conditioner meets the evaporator frosting conditions, the outdoor fan speed is reduced and the compressor operating frequency is increased, which can prevent liquid refrigerant from depositing at the bottom of the condenser of the outdoor unit and avoid vapor-liquid diversion in the evaporator. Bias flow occurs to ensure uniform distribution of cold and heat in different parts of the evaporator, thereby effectively preventing frost on the evaporator and thereby improving the air conditioner's capacity output at low frequencies.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Description of the drawings

Figure 1 is a flow chart of a method for preventing liquid refrigerant deposition according to an embodiment of the present application;

Figure 2 is a block diagram of the acquisition module and the control module of the liquid refrigerant deposition prevention device according to an embodiment of the present application;

Figure 3 is a flow chart of a specific embodiment of a method for preventing liquid refrigerant deposition according to an embodiment of the present application;

Figure 4 is a block diagram of a processor, memory, communication interface, and communication bus according to an embodiment of the present application;

Figure 5 is a schematic diagram of a pipeline assembly according to an embodiment of the present application.

Detailed ways

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, but should not be construed as limiting the present application.

The method for preventing liquid refrigerant deposition according to the embodiment of the present application is described below with reference to the accompanying drawings. The method for preventing liquid refrigerant deposition is applied to air conditioners.

As shown in Figure 1, according to the method for preventing liquid refrigerant deposition according to the embodiment of the present application, the method for preventing liquid refrigerant deposition includes the following steps:

S100. When the air conditioner is running for cooling, obtain the compressor operating frequency and outdoor ambient temperature.

It should be noted that the air conditioner can be provided with an acquisition module. When the air conditioner is running for cooling, the acquisition module can acquire the compressor operating frequency and outdoor ambient temperature.

S200. When determining that the air conditioner meets the low-frequency operation conditions based on the compressor operating frequency and outdoor ambient temperature, determine the evaporator temperature information, and determine that the air conditioner meets the evaporator frosting conditions based on the evaporator temperature information, simultaneously reduce the outdoor fan speed and Increase compressor operating frequency.

It should be noted that the air conditioner can be provided with a control module. The control module is connected to the acquisition module through communication. The acquisition module can transmit the acquired compressor operating frequency and outdoor ambient temperature information to the control module. The control module determines the operating frequency of the compressor and the outdoor ambient temperature information. When the ambient temperature determines that the air conditioner meets the low-frequency operating conditions, the control module determines the evaporator temperature information, and when it is determined based on the evaporator temperature information that the air conditioner meets the evaporator frosting conditions, the control module controls the air conditioner to reduce the outdoor fan speed and increase the compressor operation. frequency.

Among them, after the air conditioner is turned on, the operating mode of the air conditioner is detected. When the air conditioner is working in the heating mode, the operating mode of the air conditioner is continued to be detected. When it is detected that the air conditioner is working in the cooling mode, the acquisition module obtains the compressor operating frequency and outdoor ambient temperature of the air conditioner. The acquisition module transmits the acquired compressor operating frequency and outdoor ambient temperature information to the control module. The control module determines based on the compressor operating frequency and outdoor ambient temperature that when the air conditioner meets the low-frequency operating conditions, there is a probability that liquid refrigerant deposition will occur. It will cause bias flow and cause evaporator frosting. The control module further determines the evaporator temperature information, and determines that the air conditioner meets the evaporator frosting conditions based on the evaporator temperature information. The control module controls the air conditioner to reduce the outdoor fan speed and increase the compressor operating frequency. , increase the pressure on the side of the outdoor unit, thereby increasing the pressure ratio of the entire system of the air conditioner, thereby increasing the flow rate of the refrigerant in the entire system of the air conditioner, preventing liquid refrigerant from depositing at the bottom of the condenser of the outdoor unit, and avoiding deviation of the vapor-liquid split in the evaporator. It ensures the uniform distribution of cold and heat in different parts of the evaporator, thereby effectively preventing the evaporator from frosting, thereby improving the capacity output of the air conditioner at low frequencies, and effectively improving the energy efficiency of the air conditioner.

Therefore, during the cooling operation of the air conditioner, it is determined based on the compressor operating frequency and the outdoor ambient temperature that the air conditioner meets the low-frequency operating conditions, the evaporator temperature information is determined, and based on the evaporator temperature information it is determined that the air conditioner meets the evaporator frosting conditions. , reducing the speed of the outdoor fan and increasing the operating frequency of the compressor can prevent liquid refrigerant from depositing at the bottom of the condenser of the outdoor unit, avoid biased flow of vapor and liquid in the evaporator, and ensure uniform distribution of cold and heat in different parts of the evaporator, thereby effectively preventing the evaporator from Frost will form, thereby increasing the air conditioner's capacity output at low frequencies.

In some embodiments of the present application, determining that the air conditioner meets the low-frequency operation condition based on the compressor operating frequency and the outdoor ambient temperature may include: when the compressor operating frequency is less than the first preset frequency threshold and the outdoor ambient temperature is less than the first preset frequency threshold, When setting the temperature, make sure the air conditioner meets the low-frequency operation conditions. Wherein, the first preset frequency threshold can be set to 35HZ-45HZ, further, the first preset frequency threshold can be set to 40HZ, the first preset temperature can be set to 25°C-35°C, further, the first preset temperature Set to 30°C, the specific values of the first preset frequency threshold and the first preset temperature can be specifically selected according to the specific usage conditions of the air conditioner. When the acquisition module obtains that the operating frequency of the compressor is less than the first preset frequency threshold and obtains that the outdoor ambient temperature is less than the first preset temperature, the control module determines that the air conditioner meets the low-frequency operation conditions. At this time, there is a probability that liquid refrigerant deposition will occur. It may cause bias flow and cause frost on the evaporator. Such a setting can achieve the effect of determining whether the air conditioner meets the low-frequency operating conditions. It should be noted that when the compressor operating frequency is greater than the first preset frequency threshold, subsequent determination is not performed temporarily, and the acquisition module continues to obtain the compressor operating frequency. Or when the outdoor ambient temperature is greater than the first preset temperature, subsequent determination is not performed temporarily, and the acquisition module continues to acquire the outdoor ambient temperature.

In some embodiments of the present application, determining the evaporator temperature information may include: obtaining the evaporator temperature every preset time, and determining the evaporator temperature change rate based on the evaporator temperature obtained every preset time. Further, the preset time can be set to 10s-30s, for example, the preset time can be set to 20s. When the acquisition module obtains that the operating frequency of the compressor is less than the first preset frequency threshold and the outdoor ambient temperature is less than the first preset temperature, the system will default to a probability of liquid refrigerant deposition, which may cause bias flow and evaporation. If the evaporator is frosted, further determination will be made. In the next period of time (for example, 5 minutes), the acquisition module will continue to obtain the evaporator temperature every preset time, and determine the evaporation based on the evaporator temperature obtained every preset time. The evaporator temperature change rate, the evaporator temperature change rate calculation method is P=(TN+1-TN)/t, t is the preset time, TN+1 and TN represent the evaporator temperature values of two consecutive detections, set like this The technical effect of determining the evaporator temperature information can be achieved, so that the control module can accurately determine whether the air conditioner meets the evaporator frosting conditions.

In some embodiments of the present application, determining that the air conditioner meets the evaporator frosting condition based on the evaporator temperature information may include: the currently obtained evaporator temperature is greater than or equal to the last obtained evaporator temperature, or the evaporator temperature change rate When it is less than or equal to the first set value, if the currently obtained evaporator temperature is less than the second preset temperature, it is determined that the air conditioner meets the evaporator frosting condition. Among them, the first set value can be set to 2°C/min, and the second preset temperature can be set to 3°C, but the application is not limited to this. The values of the first set value and the second preset temperature can be set according to the actual situation. Specific choices. When the currently obtained evaporator temperature is greater than or equal to the last obtained evaporator temperature, or the evaporator temperature change rate is less than or equal to the first set value, the evaporator temperature is detected. If the currently obtained evaporator temperature is less than the second preset temperature , the system determines that the probability of causing frost is the highest, and the air conditioner directly enters the revision mode, reducing the outdoor fan speed, increasing the compressor operating frequency, and increasing the outdoor unit side pressure, thereby increasing the pressure ratio of the entire system of the air conditioner, thereby improving The refrigerant flow rate in the entire system of the air conditioner prevents liquid refrigerant from depositing at the bottom of the condenser of the outdoor unit, avoids biased flow of vapor and liquid in the evaporator, and ensures uniform distribution of cold and heat in different parts of the evaporator, thereby effectively preventing frost on the evaporator and thereby improving the efficiency of the air conditioner. The capacity output of the air conditioner at low frequency is effectively improved, and the energy efficiency of the air conditioner is effectively improved.

In some embodiments of the present application, after determining the evaporator temperature information, the method for preventing liquid refrigerant deposition may further include: after determining the evaporator temperature information, when the currently acquired evaporator temperature is less than the last acquired evaporator temperature, And when the evaporator temperature change rate is greater than the first set value, the outdoor fan speed is reduced. Among them, after the evaporator temperature information is determined, when the currently obtained evaporator temperature is less than the last obtained evaporator temperature and the evaporator temperature change rate is greater than the first set value, it is determined that the probability of causing frosting is further increased. At this time, the air conditioner will enter prevention mode in advance, reduce the speed of the outdoor fan, and increase the pressure on the side of the outdoor unit, thereby increasing the pressure ratio of the entire system of the air conditioner, thus increasing the flow rate of refrigerant in the entire system of the air conditioner, and preventing condensation of liquid refrigerant deposited on the outdoor unit. At the bottom of the evaporator, it avoids the deviation of the vapor-liquid flow in the evaporator and ensures uniform distribution of cold and heat in different parts of the evaporator, thereby effectively preventing the evaporator from frosting, thereby improving the capacity output of the air conditioner at low frequencies, and effectively improving the energy efficiency of the air conditioner.

In some embodiments of the present application, after reducing the outdoor fan speed, the method for preventing liquid refrigerant deposition may also include: if the evaporator temperature change rate tends to be stable, controlling the outdoor fan to keep the current operating speed unchanged, and if the evaporator temperature If the change rate is greater than the first set value, or the currently obtained evaporator temperature is less than the second preset temperature, the compressor operating frequency is increased. Among them, the evaporator temperature change rate tends to be stable means that the evaporator temperature change rate value is within a preset value range, and the preset value range is specifically selected according to the actual situation. After reducing the outdoor fan speed, the air conditioner enters prevention mode. After reducing the outdoor fan speed, if the evaporator temperature change rate becomes stable, the outdoor fan is controlled to maintain the current operating speed until the operating mode changes or the ambient temperature, etc. changes happened. If the evaporator temperature change rate is greater than the first set value (for example, 2°C/min), or the currently obtained evaporator temperature is less than the second preset temperature (for example, 3°C), then the action of reducing the outdoor fan speed in prevention mode is considered If it is not enough to support the change of system operating status, it will enter the revision mode, increase the operating frequency of the compressor, and increase the pressure on the outdoor unit side, thereby increasing the pressure ratio of the entire system of the air conditioner, thus increasing the flow rate of refrigerant in the entire system of the air conditioner and preventing liquid refrigerant Deposited at the bottom of the condenser of the outdoor unit, it prevents the deviation of the vapor-liquid flow in the evaporator and ensures uniform distribution of cold and heat in different parts of the evaporator, thereby effectively preventing the evaporator from frosting and thereby improving the air conditioner's capacity output at low frequencies. The air conditioner can Performance is effectively improved.

In some embodiments of the present application, simultaneously reducing the outdoor fan speed and increasing the compressor operating frequency may include: reducing the outdoor fan speed according to a preset step size while increasing the compressor operating frequency to a second preset frequency threshold, where , the second preset frequency threshold is greater than the first preset frequency threshold. It should be noted that reducing the outdoor fan speed according to the preset step size may mean reducing the outdoor fan speed by 20%-40% of the current outdoor fan speed. The outdoor fan speed is reduced each time by 20%-40% of the current outdoor fan speed. , the second preset frequency threshold may be 50HZ. Such a setting can make the outdoor fan speed drop appropriately every time, and also ensure that the compressor operating frequency is increased to the appropriate frequency, which can further increase the pressure on the outdoor unit side, thus increasing the pressure ratio of the entire system of the air conditioner, thus further improving the overall air conditioner. The refrigerant flow rate in the system further prevents the liquid refrigerant from depositing at the bottom of the condenser of the outdoor unit, further avoids the deviation of the vapor-liquid split in the evaporator, and further ensures the uniform distribution of cold and heat in different parts of the evaporator, thereby more effectively preventing the evaporator from frosting, and thus The capacity output of the air conditioner at low frequency is further improved, and the energy efficiency of the air conditioner is effectively improved.

In some embodiments of the present application, after reducing the outdoor fan speed according to a preset step, the method for preventing liquid refrigerant deposition may also include: if the evaporator temperature change rate is less than or equal to the first set value (for example, 2°C/min) , and the currently obtained evaporator temperature is greater than or equal to the second preset temperature (for example, 3°C), the outdoor fan is controlled to keep the current operating speed unchanged until the operating mode of the air conditioner changes or the outdoor ambient temperature changes. This setting can effectively ensure that the liquid refrigerant will not be deposited at the bottom of the condenser of the outdoor unit, further ensuring uniform distribution of cold and heat in different parts of the evaporator, thereby more effectively preventing frost on the evaporator.

The method for preventing liquid refrigerant deposition according to the embodiment of the present application is described in detail below based on Figure 3. The method for preventing liquid refrigerant deposition includes the following steps:

S101. Control the air conditioner to start;

S102. Detect the operating mode of the air conditioner. When it is determined that the air conditioner is working in the heating mode, execute step S103. When it is determined that the air conditioner is working in the cooling mode, execute step S104;

S103. Do not obtain the compressor operating frequency and outdoor ambient temperature;

S104. Obtain the real-time operating frequency of the compressor. If the compressor operating frequency is greater than the first preset frequency threshold (for example, 40HZ), perform step S105. If the compressor operating frequency is less than the first preset frequency threshold (for example, 40HZ), perform step S105. S106;

S105. Continue to obtain the real-time operating frequency of the compressor and do not perform subsequent judgments for the time being;

S106. Obtain the outdoor ambient temperature. If the outdoor ambient temperature is greater than the first preset temperature (for example, 30°C), execute step S107. If the outdoor ambient temperature is lower than the first preset temperature (eg, 30°C), execute step S108;

S107. Continue to obtain the outdoor ambient temperature, and do not perform subsequent judgments for the time being;

S108. When the operating frequency of the compressor is less than the first preset frequency threshold and the outdoor ambient temperature is less than the first preset temperature, the air conditioner system will default to this operating condition and working condition, and there is a probability that liquid refrigerant deposition will occur. , it may cause bias flow and cause frosting on the evaporator. For further judgment, in the next 5 minutes, obtain the evaporator temperature every preset time (10s-30s), and calculate the evaporator temperature change rate P in real time. , if P>2℃/min, and TN+1-TN<0, execute step S109; if P>2°C/min and TN+1-TN<0 are not satisfied at the same time, execute step S110;

S109. The system of the air conditioner determines that the probability of frost formation is further increased. At this time, it will enter the prevention mode in advance and execute step S111;

S110. Continue to detect the evaporator temperature. If the evaporator temperature is lower than the second preset temperature (3°C), the system determines that the probability of causing frost is the highest level. The air conditioner directly enters the revision mode and executes step S112. If the evaporator temperature Greater than or equal to the second preset temperature, execute step S117;

S111. Enter the prevention mode and reduce the outdoor fan speed according to the preset step size (reduce the current outdoor fan speed by 20%-40%). The purpose of performing this action is to reduce the speed and increase the outdoor pressure, thereby improving the entire air conditioner system. The pressure ratio of the system increases the cold flow rate of the system to eliminate the liquid refrigerant deposition phenomenon, and then perform step S113;

S112. After entering the revision mode, if the prevention mode has been entered before, the compressor operating frequency will be further increased to the second preset frequency threshold (for example, 50HZ) on the basis of reducing the outdoor fan speed. If the revision mode is directly entered, the compressor operating frequency will be lowered. The outdoor fan rotates and the compressor operating frequency is increased to the second preset frequency threshold. After the above actions are performed, step S114 is executed;

S113. If the evaporator temperature change rate tends to be stable, and T also tends to be stable (for example, the absolute value range of TN+1-TN is 0-0.5, which means T tends to be stable), then by default this operating state will remain unchanged until If the operating mode changes or the ambient temperature changes, and after executing this program, P>2℃/min or the evaporator temperature is less than the second preset temperature (3℃), it is considered that the action of reducing the outdoor fan speed in the prevention mode is not enough. If the operating status of the support system changes, enter the revision mode and execute step S112;

S114. Continuously detect the evaporator temperature change rate P and evaporator temperature T. If the evaporator temperature change rate is less than or equal to the first set value and the evaporator temperature is greater than or equal to the second preset temperature, perform step S115. If the evaporator temperature changes If the rate is greater than the first set value, or the currently obtained evaporator temperature is less than the second preset temperature, perform step S116;

S115. Control the outdoor fan to keep the current operating speed unchanged until the operating mode of the air conditioner changes or the outdoor ambient temperature changes;

S116. Further reduce the outdoor fan speed according to the preset step size until the evaporator temperature change rate is less than or equal to the first set value and the evaporator temperature is greater than or equal to the second preset temperature, or until the outdoor fan speed drops to the minimum speed. If the outdoor If the fan speed is reduced to the minimum speed and still does not satisfy that the evaporator temperature change rate is less than or equal to the first set value, and the evaporator temperature is greater than or equal to the second preset temperature, step S118 is executed;

S117. Continue to detect the evaporator temperature and do not perform other actions until the evaporator temperature is greater than or equal to the second preset temperature;

S118, shutdown.

As shown in Figure 2, according to the liquid refrigerant deposition prevention device 10 of the embodiment of the present application, the liquid refrigerant deposition prevention device 10 is used in an air conditioner. The liquid refrigerant deposition prevention device 10 can implement the liquid refrigerant deposition prevention method in the above embodiment. The device 10 for preventing liquid refrigerant deposition includes: an acquisition module 11 and a control module 12 . The acquisition module 11 is used to acquire the compressor operating frequency and outdoor ambient temperature when the air conditioner is running for cooling. The control module 12 is used to determine the evaporator temperature information when it is determined that the air conditioner meets the low-frequency operating conditions based on the compressor operating frequency and the outdoor ambient temperature, and to simultaneously reduce the outdoor temperature when it is determined based on the evaporator temperature information that the air conditioner meets the evaporator frosting conditions. fan speed and increase compressor operating frequency.

It should be noted that the control module 12 is communicatively connected with the acquisition module 11. The acquisition module 11 can transmit the acquired compressor operating frequency and outdoor ambient temperature information to the control module 12. The control module 12 determines the compressor operating frequency and outdoor ambient temperature information based on the compressor operating frequency and outdoor ambient temperature information. When the air conditioner meets the low-frequency operation conditions, the control module 12 determines the evaporator temperature information, and when it is determined based on the evaporator temperature information that the air conditioner meets the evaporator frosting conditions, the control module 12 controls the air conditioner to reduce the outdoor fan speed and increase the compressor operating frequency. .

Among them, after the air conditioner is turned on, the operating mode of the air conditioner is detected. When the air conditioner is working in the heating mode, the operating mode of the air conditioner is continued to be detected. When it is detected that the air conditioner is working in the cooling mode, the acquisition module 11 acquires the compressor operating frequency and the outdoor ambient temperature of the air conditioner. The acquisition module 11 transmits the acquired compressor operating frequency and outdoor ambient temperature information to the control module 12. The control module 12 determines based on the compressor operating frequency and outdoor ambient temperature that when the air conditioner meets the low-frequency operating conditions, there is a probability that liquid refrigerant deposition will occur. , which may cause bias flow and cause evaporator frosting. The control module 12 further determines the evaporator temperature information, and determines that the air conditioner meets the evaporator frosting conditions based on the evaporator temperature information. The control module 12 controls the air conditioner to reduce the outdoor fan speed and Increase the operating frequency of the compressor and increase the pressure on the outdoor unit side, thereby increasing the pressure ratio of the entire system of the air conditioner, thus increasing the flow rate of refrigerant in the entire system of the air conditioner, preventing liquid refrigerant from depositing at the bottom of the condenser of the outdoor unit, and preventing vapor in the evaporator. The liquid flow is biased to ensure uniform distribution of cold and heat in different parts of the evaporator, thereby effectively preventing the evaporator from frosting, thereby improving the air conditioner's capacity output at low frequencies, and effectively improving the air conditioner's energy efficiency.

As shown in Figure 5, an air conditioner according to an embodiment of the present application includes: a compressor, an evaporator, a condenser, a controller and a throttling element. The controller is used to obtain the compressor operating frequency and outdoor ambient temperature when the air conditioner is running for cooling, and determine the evaporator temperature information based on the compressor operating frequency and outdoor ambient temperature when the air conditioner meets the low-frequency operating conditions, and determine the evaporator temperature based on the evaporator temperature. When the information determines that the air conditioner meets the evaporator frosting conditions, it simultaneously reduces the outdoor fan speed and increases the compressor operating frequency.

Specifically, during the cooling operation of the air conditioner, the compressor operating frequency and outdoor ambient temperature are obtained. When it is determined that the air conditioner meets the low-frequency operating conditions based on the compressor operating frequency and the outdoor ambient temperature, the evaporator temperature information is determined. According to the evaporator temperature information When it is determined that the air conditioner meets the conditions for evaporator frosting, control the air conditioner to reduce the outdoor fan speed and increase the compressor operating frequency. This can prevent liquid refrigerant from depositing at the bottom of the condenser of the outdoor unit, avoid biased flow of vapor and liquid in the evaporator, and ensure evaporation. The cold and heat are evenly distributed in different parts of the air conditioner, thereby effectively preventing the evaporator from frosting and thereby improving the air conditioner's capacity output at low frequencies.

As shown in Figure 5, the condenser includes a plurality of pipeline assemblies 20. Each pipeline assembly 20 includes a first group of pipelines 21 and a second group of pipelines 22. The first group of pipelines 21 has a plurality of first tubes. path 211, a plurality of first pipelines 211 are connected in series to form a first refrigerant flow path 212, the second group of pipelines 22 has a plurality of second pipelines 221 and a plurality of third pipelines 222, the plurality of second pipelines 221 are connected in series to form a second refrigerant flow path 223 and a plurality of second pipes 221 are arranged in a first row. A plurality of third pipes 222 are connected in series to form a third refrigerant flow path 224 and a plurality of third pipes 222 are arranged in a row. In the second row, a second pipe 221 located at the end of the second pipes 221 in the first row is connected with a third pipe 222 far away from the third pipe 222 in the second row to make the second refrigerant flow path 223 and the third refrigerant flow path 224 are connected in series.

Further, as shown in FIG. 5 , taking three pipeline assemblies 20 as an example, the three pipeline assemblies 20 are arranged according to the first group of pipelines 21 , the second group of pipelines 22 , and the first group of pipelines 21 . , the second group of pipelines 22, the first group of pipelines 21, and the second group of pipelines 22 are arranged in sequence. The first pipe 211, the second pipe 221 and the third pipe 222 are all U-shaped pipes. As shown in Figure 5, multiple first pipes 211 in the first group of pipes 21 are connected in series to form a first refrigerant flow path. 212. A second pipeline 221 located at the end of the second pipeline 221 is connected with a third pipeline 222 far away from the third pipeline 222 in the second row, thereby connecting the second refrigerant flow channel 223 and the third pipeline 222 . The refrigerant flow paths 224 are connected in series to form a similar Z-shaped refrigerant flow path.

Further, the first group of pipelines 21 of a pipeline assembly 20 located at the end has a first inlet 30 and a first outlet 31, the second group of pipelines 22 has a second inlet 32 and a second outlet 33, and the first outlet 31 is connected with the second outlet 33 to form a first collective outlet 34. The first group of pipelines 21 of the pipeline assembly 20 located in the middle has a third inlet 35 and a third outlet 36. The second group of pipeline assembly 20 located in the middle The pipeline 22 has a fourth inlet 37 and a fourth outlet 38. The third outlet 36 and the fourth outlet 38 are connected to form a second collective outlet 39. The first group of pipelines 21 of another pipeline assembly 20 located at the end has a third A collective inlet 391 and a fifth outlet 392. The second group of pipelines 22 of another pipeline assembly 20 located at the end has a second collective inlet 393 and a sixth outlet 394. The first collective outlet 34 and the first collective inlet 391 Connected, the second summary outlet 39 is connected with the second summary inlet 393, the fifth outlet 392 and the sixth outlet 394 are connected to form a general outlet 395, and the general outlet 395 is connected with the throttling element.

Among them, the first outlet 31 and the second outlet 33 are connected to form a first collective outlet 34. The first collective outlet 34 is connected to the first collective inlet, which can increase the refrigerant flow rate at the lower end of the condenser, thereby increasing the flow rate of the refrigerant in the condenser. The subcooling at the end improves the evaporation effect after throttling, thereby improving the air conditioner's capacity and energy efficiency under low-frequency and low-working conditions. Moreover, through the arrangement of the multiple pipeline components 20 in this application, the liquid refrigerant is not easily deposited at the lower end of the condenser, which slows down the deposition of liquid refrigerant in the condenser, avoids the deviation of the vapor-liquid split in the evaporator, and ensures evaporation. The cold and heat are evenly distributed in different parts of the evaporator, thus effectively preventing the evaporator from frosting.

An air conditioner controller according to an embodiment of the present application includes a memory, a processor, and an anti-liquid refrigerant deposition program stored in the memory and executable on the processor. When the processor executes the anti-liquid refrigerant deposition program, the above embodiments are implemented. Methods to prevent liquid refrigerant deposition.

According to the air conditioner controller according to the embodiment of the present application, when the processor executes the liquid refrigerant deposition prevention program, during the refrigeration operation of the air conditioner, when it is determined based on the compressor operating frequency and the outdoor ambient temperature that the air conditioner meets the low-frequency operating conditions, the evaporator Temperature information, based on the evaporator temperature information, when it is determined that the air conditioner meets the evaporator frosting conditions, the outdoor fan speed is reduced and the compressor operating frequency is increased, which can prevent liquid refrigerant from depositing at the bottom of the condenser of the outdoor unit and avoid vapor-liquid diversion in the evaporator. Bias flow occurs to ensure uniform distribution of cold and heat in different parts of the evaporator, thereby effectively preventing frost on the evaporator and thereby improving the air conditioner's capacity output at low frequencies.

As shown in Figure 4, a computer-readable storage medium according to an embodiment of the present application has a liquid refrigerant deposition prevention program stored thereon. When the liquid refrigerant deposition prevention program is executed by the processor 1201, the liquid refrigerant deposition prevention method of the above embodiment is implemented. . When the liquid refrigerant deposition prevention program is executed by the processor 1201, during the cooling operation of the air conditioner, when it is determined that the air conditioner meets the low-frequency operation conditions based on the compressor operating frequency and the outdoor ambient temperature, the evaporator temperature information is determined, and the evaporator temperature information is determined. When the air conditioner meets the conditions for evaporator frosting, reducing the outdoor fan speed and increasing the compressor operating frequency can prevent liquid refrigerant from depositing at the bottom of the condenser of the outdoor unit, avoid biased flow of vapor and liquid in the evaporator, and ensure cooling in different parts of the evaporator. The heat is distributed evenly, thus effectively preventing the evaporator from frosting, thereby improving the air conditioner's capacity output at low frequencies.

As shown in Figure 4, the computer-readable storage medium includes at least one processor 1201, at least one communication interface 1202, at least one memory 1203 and at least one communication bus 1204; in the embodiment of the present application, the processor 1201, the communication interface The number of 1202, memory 1203, and communication bus 1204 is at least one, and the processor 1201, the communication interface 1202, and the memory 1203 complete communication with each other through the communication bus 1204.

Among them, the memory 1203 can be, but is not limited to, random access memory (Random Access Memory, RAM), read-only memory (Read Only Memory, ROM), programmable read-only memory (Programmable Read-Only Memory, PROM), and can Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), etc. The memory 1203 is used to store a program. After receiving the execution instruction, the processor 1201 executes the program to implement the steps of the air conditioning control method described in the above embodiment.

The processor 1201 may be an integrated circuit chip with signal processing capabilities. The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NetworkProcessor, NP), etc.; it can also be a digital signal processor (DSP), application specific integrated circuit (ASIC), Field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. Each method, step and logical block diagram disclosed in the embodiment of this application can be implemented or executed. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc.

It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, for example, may be considered to be a sequenced list of executable instructions for implementing logical functions, which may be embodied in any computer. in a readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can retrieve and execute instructions from the instruction execution system, apparatus, or device) Used by instruction execution systems, devices or equipment. For the purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer readable media include the following: electrical connections with one or more wires (electronic device), portable computer disk cartridges (magnetic device), random access memory (RAM), Read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium may even be paper or other suitable medium on which the program may be printed, as the paper or other medium may be optically scanned, for example, and subsequently edited, interpreted, or otherwise suitable as necessary. process to obtain the program electronically and then store it in computer memory.

It should be understood that various parts of the present application can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if it is implemented in hardware, as in another embodiment, it can be implemented by any one or a combination of the following technologies known in the art: a logic gate circuit with a logic gate circuit for implementing a logic function on a data signal. Discrete logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), etc.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "an example," "specific examples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , structures, materials or features are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the description of this application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axis", The orientation or positional relationship indicated by "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply the device or element to which it refers. Must have a specific orientation, be constructed and operate in a specific orientation and therefore should not be construed as a limitation on this application.

In addition, terms such as “first” and “second” used in the embodiments of this application are only used for descriptive purposes and may not be understood as indicating or implying relative importance, or implicitly indicating what is indicated in this embodiment. number of technical features. Therefore, features defined by terms such as “first” and “second” in the embodiments of this application may explicitly or implicitly indicate that the embodiment includes at least one of the features. In the description of this application, the word "plurality" means at least two or two and more, such as two, three, four, etc., unless otherwise clearly and specifically limited in the embodiment.

In this application, unless there are other clear relevant provisions or limitations in the embodiments, the terms "installation", "connection", "connection" and "fixing" appearing in the embodiments should be understood in a broad sense. For example, connection can It can be a fixed connection, or it can be a detachable connection, or it can be integrated. It can be understood that it can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be two The internal connection between components, or the interaction between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific implementation conditions.

In this application, unless otherwise expressly stated and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. touch. Furthermore, the terms "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and cannot be understood as limitations of the present application. Those of ordinary skill in the art can make modifications to the above-mentioned embodiments within the scope of the present application. The embodiments are subject to changes, modifications, substitutions and variations.

Claims (12)

1. A method for preventing liquid refrigerant deposition, which is applied in an air conditioner, and the method includes:

   When the air conditioner is running for cooling, obtain the compressor operating frequency and outdoor ambient temperature;

   When it is determined that the air conditioner meets the low-frequency operation condition based on the compressor operating frequency and the outdoor ambient temperature, evaporator temperature information is determined, and when it is determined that the air conditioner meets the evaporator frosting condition based on the evaporator temperature information, At the same time, the outdoor fan speed is reduced and the compressor operating frequency is increased.
2. The method of claim 1, wherein determining that the air conditioner meets low-frequency operation conditions based on the compressor operating frequency and outdoor ambient temperature includes:

   When the compressor operating frequency is less than the first preset frequency threshold and the outdoor ambient temperature is less than the first preset temperature, it is determined that the air conditioner meets the low-frequency operation condition.
3. The method of claim 2, wherein determining evaporator temperature information includes:

   The evaporator temperature is obtained every preset time, and the evaporator temperature change rate is determined based on the evaporator temperature obtained every preset time.
4. The method of claim 3, wherein determining that the air conditioner meets evaporator frosting conditions based on the evaporator temperature information includes:

   When the currently acquired evaporator temperature is greater than or equal to the last acquired evaporator temperature, or the evaporator temperature change rate is less than or equal to the first set value, if the currently acquired evaporator temperature is less than the second preset temperature, then determine The air conditioner meets evaporator frosting conditions.
5. The method of claim 4, wherein after determining the evaporator temperature information, the method further includes:

   When the currently obtained evaporator temperature is less than the last obtained evaporator temperature and the evaporator temperature change rate is greater than the first set value, the outdoor fan speed is reduced.
6. The method according to claim 5, wherein after reducing the outdoor fan speed, the method further includes:

   If the evaporator temperature change rate becomes stable, the outdoor fan is controlled to keep the current operating speed unchanged;

   If the evaporator temperature change rate is greater than the first set value, or the currently obtained evaporator temperature is less than the second preset temperature, the compressor operating frequency is increased.
7. The method according to claim 4, wherein simultaneously reducing the outdoor fan speed and increasing the compressor operating frequency includes:

   The rotation speed of the outdoor fan is reduced according to a preset step size, and the operating frequency of the compressor is increased to a second preset frequency threshold, where the second preset frequency threshold is greater than the first preset frequency threshold.
8. The method according to claim 7, wherein after reducing the rotation speed of the outdoor fan according to a preset step size, the method further includes:

   If the evaporator temperature change rate is less than or equal to the first set value and the currently obtained evaporator temperature is greater than or equal to the second preset temperature, the outdoor fan is controlled to keep the current operating speed unchanged;

   If the evaporator temperature change rate is greater than the first set value, or the currently obtained evaporator temperature is less than the second preset temperature, continue to reduce the outdoor fan speed according to the preset step size until the outdoor fan speed reaches Preset minimum speed.
9. A device for preventing liquid refrigerant deposition, which is used in an air conditioner, and the device includes:

   An acquisition module, used to acquire the compressor operating frequency and outdoor ambient temperature when the air conditioner is running for cooling;

   A control module configured to determine evaporator temperature information when it is determined that the air conditioner meets the low-frequency operating conditions based on the compressor operating frequency and outdoor ambient temperature, and determine that the air conditioner meets the evaporator temperature information based on the evaporator temperature information. During frost conditions, simultaneously reduce the outdoor fan speed and increase the compressor operating frequency.
10. An air conditioner, which includes:

    Compressor, evaporator, condenser and throttling element, the condenser includes a plurality of pipeline assemblies, each of the pipeline assemblies includes a first group of pipelines and a second group of pipelines, the first group The pipeline has a plurality of first pipelines, and a plurality of the first pipelines are connected in series to form a first refrigerant flow path, and the second group of pipelines has a plurality of second pipelines and a plurality of third pipelines, A plurality of the second pipelines are connected in series to form a second refrigerant flow path and a plurality of the second pipelines are arranged in a first row. A plurality of the third pipelines are connected in series to form a third refrigerant flow path and a plurality of the second pipelines are arranged in a first row. The third pipelines are arranged in a second row. One of the second pipelines in the first row is located at the end and the third pipeline in the second row is far away from it. A third pipeline is connected to connect the second refrigerant flow path and the third refrigerant flow path in series;

    A controller configured to obtain the operating frequency of the compressor and the outdoor ambient temperature when the air conditioner is running for cooling, and determine the evaporator when the air conditioner meets the low-frequency operating conditions based on the compressor operating frequency and the outdoor ambient temperature. temperature information, and when it is determined that the air conditioner meets the evaporator frosting condition based on the evaporator temperature information, the outdoor fan speed is reduced and the compressor operating frequency is increased at the same time.
11. An air conditioner controller, which includes a memory, a processor, and an anti-liquid refrigerant deposition program stored in the memory and executable on the processor. When the processor executes the anti-liquid refrigerant deposition program, the process according to the right The method for preventing liquid refrigerant deposition according to any one of claims 1-8.
12. A computer-readable storage medium, wherein an anti-liquid refrigerant deposition program is stored thereon, and when the anti-liquid refrigerant deposition program is executed by a processor, the anti-liquid refrigerant deposition method according to any one of claims 1-8 is implemented. .

Images