A method and device for preventing condensation in a wall-mounted inverter air conditioner

Abstract

This invention provides a method and device for preventing condensation in a wall-mounted inverter air conditioner. The control method includes the following steps: when the air conditioner enters the cooling anti-direct-blow mode, time-sharing frequency limiting control and airflow compensation control are executed simultaneously. The time-sharing frequency limiting control, within the time window before condensation forms, controls the compressor to operate at the highest frequency limit corresponding to the currently set fan speed of the indoor fan to cool and dehumidify; then, frequency reduction is used to further reduce condensation formation. The airflow compensation control uses the airflow at the default position of the air guide vane during normal cooling as a reference, and compensates for the airflow loss caused by changes in the position of the air guide vane by increasing the indoor fan speed, thereby increasing the evaporation temperature and outlet air temperature. This invention solves the problem that existing technologies, when dealing with condensation generated in the anti-direct-blow mode of wall-mounted air conditioners with large vanes, cannot simultaneously consider user experience, cooling effect, and hardware cost.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to a method and device for preventing condensation in a wall-mounted inverter air conditioner. Background Technology

[0002] As users' demands for air conditioning comfort continue to rise, air conditioner functional designs are becoming increasingly refined and user-friendly. For example, for wall-mounted air conditioners, the market has widely developed directional airflow functions designed to optimize physical comfort: in heating mode, the airflow structure directs hot air downwards, creating a so-called "carpet breeze" to quickly raise the temperature at the bottom of the room; in cooling mode, to avoid discomfort caused by cold air blowing directly on the body, "anti-direct-blow" or "skylight breeze" modes have emerged, directing cold air to the ceiling. To achieve this precise airflow effect, wall-mounted air conditioners generally adopt a "large swivel blade" design with a larger airflow angle and often a specific curvature, as shown in the attached image. Figure 1 As shown, A and B represent the oscillating blade positions during normal cooling, while C represents the oscillating blade position during cooling to prevent direct airflow. This achieves both downward and upward airflow guidance and a better user experience.

[0003] While this design significantly improves the user's directional airflow experience, it also introduces a new technical challenge—the risk of condensation. Specifically, in cooling mode, when the large oscillating blades swing upwards to prevent direct airflow, the resistance of the air outlet channel increases, leading to reduced airflow, lower evaporation temperature, and consequently, a drop in outlet air temperature. In environments with high indoor humidity, if the outlet air temperature falls below the air's dew point, water vapor will condense into droplets on the surface of the oscillating blades, producing condensation. This condensation may drip or be blown out by the airflow, not only damaging the indoor environment and affecting the user experience but also potentially posing safety hazards. The risk of condensation is particularly pronounced with the large oscillating blades, especially those with rounded edges, due to their structural characteristics.

[0004] To address these issues, traditional solutions primarily rely on adding humidity sensors. When the sensor detects high indoor humidity, the control system drastically limits the compressor's operating frequency (e.g., reducing it by more than 30Hz), sacrificing cooling capacity and dehumidification to increase the evaporation temperature and thus prevent condensation. However, this method has significant drawbacks: firstly, the drastic frequency reduction severely weakens the air conditioner's cooling performance, failing to meet users' needs for rapid cooling and dehumidification; secondly, the added humidity sensor directly increases product costs.

[0005] Technological innovation within the industry is constantly exploring alternative paths. For example, some solutions adjust the airflow direction and optimize condensation by adding movable anti-condensation structures to the air outlet. However, this method requires changes to the product's appearance and structure, increasing hardware costs and assembly complexity, and may not be acceptable to all users. Other solutions attempt to proactively change the position and angle of the air guide plate when condensation risk is detected, along with reduced frequency operation. While this can alleviate condensation to some extent, it alters the user-defined airflow mode, deviating from the user's original intention for using the "anti-direct-blow" function, essentially sacrificing a customized comfort experience.

[0006] In addition, existing technologies employ various methods for assessing condensation risk based on indirect parameters. For example, these methods detect parameters such as indoor ambient temperature, humidity, evaporator pipe temperature, or outlet air temperature, and then calculate and convert these parameters to determine whether to enter anti-condensation mode. However, these methods rely on data from local sensors and may not accurately reflect the true state of the entire room or air deflector, easily leading to misjudgments—either excessive frequency reduction affecting the user experience when no intervention is needed, or delayed response when truly required. Some solutions determine moisture content by detecting pressure differences within the air duct, but their detection accuracy and reliability also face challenges.

[0007] In summary, existing technologies often face a dilemma in addressing the condensation problem in the anti-direct-blow mode of wall-mounted air conditioners: they either significantly sacrifice cooling performance and increase hardware costs, or compromise the original functional purpose by altering user-defined operating modes. Therefore, the market urgently needs an innovative control strategy that, without relying on additional humidity sensors or other hardware, can intelligently and precisely prevent condensation while maintaining the anti-direct-blow function and ensuring cooling capacity, thus truly achieving a balance between comfort and reliability. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a method and device for preventing condensation in wall-mounted inverter air conditioners. This method solves the problem that existing technologies cannot simultaneously consider user experience, cooling effect, and hardware cost when dealing with condensation generated in the anti-direct-blow mode of wall-mounted air conditioners with large swing blades.

[0009] According to an embodiment of the present invention, a method for preventing condensation in a wall-mounted inverter air conditioner is provided. The air conditioner includes an indoor unit and an outdoor unit. The indoor unit includes an indoor fan and an air outlet. The outdoor unit includes a compressor. The air outlet has an air guide plate. The control method includes the following steps:

[0010] When the air conditioner enters the cooling anti-direct-blow mode, time-sharing frequency limiting control and air volume compensation control are executed simultaneously.

[0011] The time-division frequency limiting control includes controlling the compressor to operate at the highest frequency limit corresponding to the current set wind speed of the indoor fan during the time window when condensation does not form, in order to cool and dehumidify; and then reducing the frequency to reduce the formation of condensation.

[0012] The air volume compensation control uses the air volume at the default position of the air guide vane during normal cooling as a reference. It compensates for the air volume loss caused by the change in the position of the air guide vane by increasing the indoor fan speed, thereby improving the evaporation temperature and the outlet air temperature.

[0013] On the other hand, according to an embodiment of the present invention, a wall-mounted inverter air conditioner anti-condensation control device is also provided. The air conditioner includes an indoor unit and an outdoor unit. The indoor unit includes an indoor fan and an air outlet. The outdoor unit includes a compressor. The air outlet has an air guide plate. The control device includes a detection module, a control module, a time-sharing frequency control module, and an air volume compensation module, wherein:

[0014] The detection module is used to detect whether the air conditioner is in the cooling anti-direct-blow mode, and also to detect the current deflection position of the air guide plate.

[0015] The control module is used to receive data output by the detection module and output corresponding control commands to the time-sharing frequency control module and the air volume compensation module according to the received data;

[0016] The time-sharing frequency control module is used to execute time-sharing frequency limiting control logic to control the compressor to operate at the corresponding maximum frequency limit in different time periods.

[0017] The air volume compensation module is used to execute air volume compensation control logic, calculate the target compensation speed of the indoor fan based on the current deflection position of the air guide plate, and control the indoor fan to run at the target compensation speed.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] By simultaneously executing time-sharing frequency limiting control and air volume compensation control when the air conditioner enters the cooling anti-direct-blow mode, the coordinated control of time-sharing frequency control and air volume compensation is achieved, ensuring that the surface temperature of the air guide plate is always higher than the dew point temperature. Compared with traditional technical solutions, this effectively prevents condensation while minimizing the impact on the overall cooling effect, resulting in a better user experience.

[0020] Condensation is prevented by using coordinated control of time-sharing frequency limiting control and air volume compensation control. When using the air conditioner, it can be applied to various wall-mounted inverter air conditioners simply by upgrading the software. There is no need to modify the hardware structure of the air conditioner or add any other additional hardware. Compared with traditional technical solutions, it reduces product costs and has stronger compatibility.

[0021] By controlling the compressor to operate at the highest frequency limit corresponding to the current set wind speed of the indoor fan during the time window when condensation does not form, and then reducing the frequency after the time window when condensation does not form, the compressor maintains high frequency for cooling in the initial period and only moderately reduces the frequency in the later period. Compared with traditional technical solutions, this improves the cooling capacity retention rate while ensuring that the dehumidification effect is not affected.

[0022] By using the air volume at the default position of the air guide vane during normal cooling as a reference, and by increasing the speed of the indoor fan to compensate for the loss of air volume caused by the change in the position of the air guide vane, the heat exchange effect of the air conditioner can be improved, the evaporation outlet temperature can be increased, and condensation can be prevented. In this way, a triple balance of "anti-condensation - cooling effect - cost" can be achieved. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the air guide plate of a wall-mounted inverter air conditioner.

[0024] Figure 2 This is a diagram illustrating the specific steps of time-division frequency limiting control in Embodiment 2 of the present invention.

[0025] Figure 3 This is a diagram illustrating the specific steps of the airflow compensation control in Embodiment 3 of the present invention.

[0026] Figure 4 This is a diagram illustrating the specific steps of calculating the target compensation speed of the indoor fan based on the current deflection position of the air guide plate in Embodiment 3 of the present invention.

[0027] Figure 5 This is a diagram illustrating the specific steps of determining whether the air conditioner has entered the cooling anti-direct-blow mode in Embodiment 4 of the present invention.

[0028] Figure 6 This is a control principle diagram of an anti-condensation control device for a wall-mounted inverter air conditioner according to Embodiment 5 of the present invention.

[0029] In the above attached diagram: 1. Detection module; 2. Control module; 3. Time-sharing frequency control module; 4. Air volume compensation module; 5. Storage module. Detailed Implementation

[0030] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Example 1

[0032] This invention provides a method for preventing condensation in a wall-mounted inverter air conditioner. The wall-mounted inverter air conditioner includes an indoor unit and an outdoor unit. The indoor unit includes an indoor fan and an air outlet. The outdoor unit includes a compressor. The air outlet has an air guide plate. The control method includes the following steps:

[0033] When the air conditioner enters the cooling anti-direct-blow mode, time-sharing frequency limiting control and air volume compensation control are executed simultaneously.

[0034] The time-division frequency limiting control includes controlling the compressor to operate at the highest frequency limit corresponding to the current set wind speed of the indoor fan during the time window when condensation does not form, in order to cool and dehumidify; and then reducing the frequency to reduce the formation of condensation.

[0035] The air volume compensation control uses the air volume at the default position of the air guide vane during normal cooling as a reference. It compensates for the air volume loss caused by the change in the position of the air guide vane by increasing the indoor fan speed, thereby improving the evaporation temperature and the outlet air temperature.

[0036] In this embodiment, when the air conditioner enters the cooling anti-direct-blow mode, the control module 2 outputs corresponding control commands to the time-sharing frequency control module 3, so that the time-sharing frequency control module 3 controls the compressor to operate at a first maximum frequency limit (i.e., the maximum frequency limit corresponding to the current set wind speed of the indoor fan) during the time window period when condensation does not form, and controls the compressor to operate at a second maximum frequency limit (the second maximum frequency limit is lower than the first maximum frequency limit) after the time window period when condensation does not form. This allows the compressor to maintain high-frequency cooling in the initial period and only moderately reduce the frequency in the later period. Compared with traditional technical solutions, this improves the cooling capacity retention rate while ensuring that the dehumidification effect is not affected.

[0037] While the air conditioner enters the cooling anti-direct-blow mode, the control module 2 outputs corresponding control commands to the air volume compensation module 4. The air volume compensation module 4 uses the air volume at the default position of the air guide vane during normal cooling as a reference, and increases the indoor fan speed to compensate for the air volume loss caused by the change in the position of the air guide vane. This improves the heat exchange effect of the air conditioner, increases the evaporation outlet temperature, prevents condensation, and achieves a triple balance of "anti-condensation - cooling effect - cost".

[0038] Example 2

[0039] As attached Figure 2 As shown, based on Embodiment 1, the specific steps of the time-division frequency limiting control are as follows:

[0040] S101. After the air conditioner enters the cooling anti-direct-blow mode, identify the current set wind speed of the indoor fan;

[0041] S102. During the first preset time period, a first gear control signal corresponding to the currently set windshield is sent to the outdoor unit, so that the compressor runs at a first maximum frequency limit corresponding to the first gear control signal.

[0042] S103. After the first preset time period ends, the first gear control signal is adjusted to the second gear control signal, so that the compressor operates at the second maximum frequency limit corresponding to the second gear control signal, and the second maximum frequency limit is lower than the first maximum frequency limit.

[0043] Preferably, in the time-division frequency limiting control, the highest operating frequency of the compressor is adjusted from the first highest frequency limit to the second highest frequency limit by reducing the operating gear signal sent to the outdoor unit.

[0044] S104. Continue to run the outdoor unit until the cooling anti-direct-blow mode is changed or the air conditioner is turned off.

[0045] In this embodiment, after the air conditioner enters the cooling anti-direct-blow mode, the current set wind speed (such as strong wind speed) of the indoor fan is identified. Then, during the first 30 minutes after the cooling anti-direct-blow mode is activated (the time window during the initial 30 minutes of cooling when condensation has not formed; the national standard defines condensation as no condensation should be blown out or dripped within 4 hours), the control module 2 sends a first gear control signal corresponding to the current set wind speed to the outdoor unit, so that the compressor operates at the first highest frequency limit corresponding to the first gear control signal. For example, if the indoor unit is in "strong power" mode, the outdoor unit operates according to the highest frequency limit (such as 87Hz) corresponding to the strong power mode.

[0046] After the 30-minute timer expires, the control module 2 sends a second-level control signal (one level lower than the first-level control signal) to the outdoor unit, causing the compressor to operate at a second maximum frequency limit, which is lower than the first maximum frequency limit. For example, the indoor unit may still display "powerful" mode, but the indoor unit sends a control signal to the outdoor unit that changes to "high fan speed." In this case, the outdoor unit will operate at the maximum frequency limit (e.g., 70Hz) corresponding to "high fan speed." The outdoor unit will continue to operate at the second maximum frequency limit until the cooling anti-direct-blow mode is changed or the air conditioner is turned off.

[0047] It is worth noting that if the current setting of the indoor fan is already at the lowest level (such as "silent mode"), there is no need to downgrade. Furthermore, the air conditioner has a pre-stored mapping relationship between the indoor fan's setting and the outdoor unit's maximum operating frequency limit. This is a common design feature in existing air conditioners used to balance noise, capacity, and system reliability. This invention cleverly utilizes this existing mapping relationship, indirectly achieving a gentle frequency limit on the compressor by "maintaining an internal display and sending a downgrade signal externally," rather than a drastic direct frequency reduction.

[0048] The gear control signals sent to the outdoor fan when the air conditioner is in the cooling anti-direct-blow mode are shown in Table 1 below, and the highest frequency limit corresponding to each gear control signal when the air conditioner is in the cooling anti-direct-blow mode is shown in Table 2 below.

[0049] Table 1. Comparison of speed control signals sent to the outdoor fan in cooling anti-direct-blow mode.

[0050]

[0051] Table 2. Comparison of the highest frequency limits for control signals at each speed setting in the cooling anti-direct-blow mode.

[0052]

[0053] Example 3

[0054] As attached Figure 3 and Figure 4 As shown, based on Embodiment 1, the specific steps of the airflow compensation control are as follows:

[0055] S201. Calculate the target compensation speed of the indoor fan based on the current deflection position of the air guide plate;

[0056] The step of calculating the target compensation speed of the indoor fan based on the current deflection position of the air guide plate specifically includes:

[0057] S2011. After the air conditioner enters the cooling anti-direct-blow mode, identify the current deflection position of the air guide plate;

[0058] S2012. Based on the current deflection position, obtain the corresponding air volume compensation parameter, wherein the air volume compensation parameter is predetermined based on the degree of air volume decrease caused by the current deflection position relative to the reference position;

[0059] Preferably, the reference position is the position where the air guide plate reaches its maximum airflow in cooling mode.

[0060] More preferably, obtaining the corresponding airflow compensation parameters based on the current deflection position includes:

[0061] Query the pre-established correspondence table between the deflection position of the air guide plate and the air volume compensation parameter, and obtain the air volume compensation parameter corresponding to the current deflection position of the air guide plate.

[0062] S2013. Calculate the target compensation speed of the indoor fan based on the air volume compensation parameters and the current set wind speed of the indoor fan.

[0063] Preferably, calculating the target compensation speed of the indoor fan based on the air volume compensation parameters and the current set wind speed of the indoor fan includes:

[0064] Obtain the reference speed of the indoor fan corresponding to the currently set fan speed.

[0065] Based on the air volume compensation parameters and the fan's reference speed, the target compensation speed of the indoor fan is calculated.

[0066] S202. Control the indoor fan to operate at the target compensated speed so that the actual air volume is close to the air volume in normal cooling mode.

[0067] S203. Continue to run the indoor fan until the cooling anti-direct-blow mode ends or the air conditioner is turned off.

[0068] In this embodiment, after the air conditioner enters the cooling anti-direct-blow mode, the detection module 1 detects the current deflection position of the air guide plate. When the air guide plate is detected to be at a specific upward angle (i.e., the air guide plate is guiding the air upward), the control module 2 obtains the air volume compensation parameter corresponding to the current deflection position of the air guide plate according to the pre-established correspondence table between the deflection position of the air guide plate and the air volume compensation parameter (the air volume compensation coefficient is obtained in advance through experiments). Then, it obtains the fan reference speed corresponding to the current set windshield of the indoor fan (the fan reference speed is obtained through experiments). Then, based on the air volume compensation parameter and the fan reference speed, it calculates the target compensation speed of the indoor fan. For example, if the air volume decreases by about 9% in the cooling anti-direct-blow mode, the compensation speed can be increased by 100 revolutions in the cooling mode.

[0069] Then, control the indoor fan to run at the increased speed so that the actual air volume reaches or approaches the level of the air guide plate when it is in the default cooling position, and let the indoor fan continue to run at the increased speed until the cooling anti-direct blowing mode is changed or the air conditioner is turned off.

[0070] The following are practical examples of air conditioners that implement time-sharing frequency limiting control and air volume compensation control:

[0071] A certain 2HP wall-mounted air conditioner was designed with the same frequency and internal fan speed in the cooling anti-direct-blow mode as in the normal cooling mode. For example, in the cooling anti-direct-blow strong mode, when performing the national standard condensation operation, the indoor fan speed was 1100 rpm (as shown in Table 3 below) and the frequency was 87 Hz. Under the national standard condensation condition, after 4 hours, a large amount of condensation water condensed on the blade roots, and a large amount of it dripped onto the red paper placed under the indoor unit, which is unqualified.

[0072] By examining the airflow and noise levels in the anti-direct-blow cooling mode and the default cooling position, a comparison was made. For example, comparing the high-power setting in the anti-direct-blow mode with the default cooling position, the airflow in the anti-direct-blow mode at 1100 RPM is 700 m³ / h, which is 69 m³ / h lower than the default cooling position. This is detrimental to cooling performance and condensation, thus justifying airflow / speed compensation. Further noise comparison revealed that the noise level in the anti-direct-blow mode at the same high-power setting of 1100 RPM is significantly lower, at 42.6 dB(A), while the noise level in normal cooling mode is 44.9 dB(A). The model's nameplate standard value is 43 dB(A), and the national standard requires that the measured value be ≤ nameplate standard value + 3 dB(A) and < 46 dB(A). Therefore, there is ample margin for improvement.

[0073] Using the noise level at the default cooling setting as a reference, the engine speed of the high-power setting was increased to 1200 RPM, resulting in a measured noise level of 44.8 dB(A) and an airflow of 767 m³ / h. The airflow and noise levels were essentially equivalent to those at the default cooling setting, achieving the desired improvement. Combined with optimized fan speed frequency limiting control measures, the maximum frequency limit of the high-power setting in the anti-direct-blow mode was reduced from 87 Hz to 70 Hz after 30 minutes. The optimization of these two control technologies resulted in a significant improvement in condensation levels, meeting the national standard for condensation reduction at all settings.

[0074] Table 3. Comparison of Cooling Speed ​​Increase Capacity and Noise Level for Anti-Direct Airflow

[0075]

[0076] Through the technical improvements in the above test cases, the actual effects have been demonstrated. It should be noted that those skilled in the art will know that the improvement scheme proposed in this case is based on meeting the national standard for condensation and has been optimized and improved. When the humidity exceeds the national standard and is higher, the improvement effect will be weakened accordingly. The speed of each gear of the indoor fan and the maximum frequency limit of each gear for the outdoor unit are different for each product and model and are not fixed values.

[0077] Example 4

[0078] As attached Figure 5 As shown, based on Embodiment 1, before executing the time-sharing frequency limiting control and the air volume compensation control, it is determined whether the air conditioner has entered the cooling anti-direct-blow mode, specifically including:

[0079] S301. Obtain the current operating mode of the air conditioner, and when the air conditioner is in cooling or dehumidification mode, determine whether the air conditioner meets the preset anti-condensation conditions.

[0080] S302. If the air conditioner meets the preset anti-condensation conditions, the air conditioner is controlled to enter the cooling anti-direct-blow mode, and in the cooling anti-direct-blow mode, time-sharing frequency limiting control and air volume compensation control are executed simultaneously.

[0081] In this embodiment, before executing the time-sharing frequency limiting control and the air volume compensation control, it is necessary to determine whether the air conditioner is in a specific operating state prone to condensation. This is achieved by the detection module 1 detecting the air conditioner's operating status (i.e., whether the air conditioner is in cooling or dehumidification mode) and the status of the air guide plate (specifically, whether the air conditioner has its anti-direct-blow function activated, and / or whether the air guide plate is operating within a preset air guide position range, such as a fixed horizontal or upward angle to prevent direct blow). Only when the above basic conditions are simultaneously met will the control module 2 initiate further judgment on the preset anti-condensation conditions; otherwise, normal operation will continue.

[0082] When it is necessary to determine whether the air conditioner meets the preset anti-condensation conditions, firstly, the surface temperature of the air guide plate and the current indoor humidity are obtained, and the condensation temperature (dew point temperature) at the current humidity is calculated. Then, the measured temperature of the air guide plate is compared with the calculated condensation temperature. When the temperature of the air guide plate reaches or falls below its condensation temperature, it indicates that condensation is about to occur or has already occurred, and the anti-condensation conditions are met. Measures must be taken immediately. At this time, the air conditioner is controlled to enter the cooling anti-direct-blow mode, and time-sharing frequency limiting control and airflow compensation control are executed simultaneously in the cooling anti-direct-blow mode. By judging whether the air conditioner meets the preset anti-condensation conditions, the risk of condensation can be predicted in advance and accurately, so as to trigger the entry into the "cooling anti-direct-blow mode" in time and start the subsequent "time-sharing frequency limiting control" and "airflow compensation control". Thus, while preventing condensation, the cooling effect and user comfort can be taken into account.

[0083] Example 5

[0084] As attached Figure 6 As shown, on the other hand, this embodiment of the invention also provides an anti-condensation control device for a wall-mounted inverter air conditioner. The wall-mounted inverter air conditioner includes an indoor unit and an outdoor unit. The indoor unit includes an indoor fan and an air outlet. The outdoor unit includes a compressor. The air outlet has an air guide plate. The control device includes a detection module 1, a control module 2, a time-sharing frequency control module 3, and an air volume compensation module 4, wherein:

[0085] The detection module 1 is used to detect whether the air conditioner is in the cooling anti-direct blowing mode, and also to detect the current deflection position of the air guide plate.

[0086] The control module 2 is used to receive the data output by the detection module 1, and output corresponding control commands to the time-division frequency control module 3 and the air volume compensation module 4 according to the received data;

[0087] The time-sharing frequency control module 3 is used to execute time-sharing frequency limiting control logic and control the compressor to operate at the corresponding maximum frequency limit in different time periods.

[0088] The air volume compensation module 4 is used to execute air volume compensation control logic, calculate the target compensation speed of the indoor fan based on the current deflection position of the air guide plate, and control the indoor fan to run at the target compensation speed.

[0089] Furthermore, the control device also includes a storage module 5, which is used to store the highest frequency limit corresponding to each windshield of the indoor fan, and to store a pre-established correspondence table between the deflection position of the air guide plate and the air volume compensation parameters; the storage module 5 is also used to receive the call command from the control module 2, and to transmit the stored data to the control module 2 after receiving the call command.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for preventing condensation in a wall-mounted inverter air conditioner, the air conditioner comprising an indoor unit and an outdoor unit, the indoor unit comprising an indoor fan and an air outlet, the outdoor unit comprising a compressor, and the air outlet having an air guide plate, characterized in that, The control method includes the following steps: When the air conditioner enters the cooling anti-direct-blow mode, time-sharing frequency limiting control and air volume compensation control are executed simultaneously. The time-division frequency limiting control includes controlling the compressor to operate at the highest frequency limit corresponding to the current set wind speed of the indoor fan during the time window when condensation does not form, in order to cool and dehumidify; and then reducing the frequency to reduce the formation of condensation. The air volume compensation control uses the air volume at the default position of the air guide vane during normal cooling as a reference. It compensates for the air volume loss caused by the change in the position of the air guide vane by increasing the indoor fan speed, thereby improving the evaporation temperature and the outlet air temperature.

2. The anti-condensation control method for a wall-mounted inverter air conditioner as described in claim 1, characterized in that, In the time-division frequency limiting control, after the time window period during which condensation does not form ends, the operating frequency of the compressor is reduced by lowering the operating gear signal sent to the outdoor unit.

3. The anti-condensation control method for a wall-mounted inverter air conditioner as described in claim 1, characterized in that, The specific steps of the airflow compensation control are as follows: Calculate the target compensation speed of the indoor fan based on the current deflection position of the air guide plate; The indoor fan is controlled to operate at the target compensated speed so that the actual air volume is close to the air volume in normal cooling mode.

4. The anti-condensation control method for a wall-mounted inverter air conditioner as described in claim 3, characterized in that, The calculation of the target compensation speed of the indoor fan based on the current deflection position of the air guide plate specifically includes: After the air conditioner enters the cooling anti-direct-blow mode, the current deflection position of the air guide plate is identified; Based on the current deflection position, the corresponding air volume compensation parameter is obtained. The air volume compensation parameter is predetermined based on the degree of air volume decrease caused by the current deflection position relative to the reference position. Based on the air volume compensation parameters and the current set wind speed of the indoor fan, calculate the target compensation speed of the indoor fan.

5. The anti-condensation control method for a wall-mounted inverter air conditioner as described in claim 4, characterized in that, The reference position is the position where the air guide plate reaches its maximum airflow in cooling mode.

6. A method for preventing condensation in a wall-mounted inverter air conditioner as described in claim 4 or 5, characterized in that, The step of obtaining the corresponding airflow compensation parameters based on the current deflection position includes: Query the pre-established correspondence table between the deflection position of the air guide plate and the air volume compensation parameter, and obtain the air volume compensation parameter corresponding to the current deflection position of the air guide plate.

7. A method for preventing condensation in a wall-mounted inverter air conditioner as described in claim 4 or 5, characterized in that, The step of calculating the target compensation speed of the indoor fan based on the air volume compensation parameters and the current set wind speed of the indoor fan includes: Obtain the reference speed of the indoor fan corresponding to the currently set fan speed. Based on the air volume compensation parameters and the fan's reference speed, the target compensation speed of the indoor fan is calculated.

8. The anti-condensation control method for a wall-mounted inverter air conditioner as described in claim 1, characterized in that, Before executing the time-sharing frequency limiting control and the air volume compensation control, it is determined whether the air conditioner has entered the cooling anti-direct-blow mode, specifically including: The current operating mode of the air conditioner is obtained, and when the air conditioner is in cooling or dehumidification mode, it is determined whether the air conditioner meets the preset anti-condensation conditions. If the air conditioner meets the preset anti-condensation conditions, the air conditioner is controlled to enter the cooling anti-direct-blow mode, and in the cooling anti-direct-blow mode, time-sharing frequency limiting control and air volume compensation control are executed simultaneously.

9. A wall-mounted inverter air conditioner anti-condensation control device, the air conditioner comprising an indoor unit and an outdoor unit, the indoor unit comprising an indoor fan and an air outlet, the outdoor unit comprising a compressor, and the air outlet having an air guide plate, characterized in that, The control device includes a detection module, a control module, a time-division frequency control module, and an air volume compensation module, wherein: The detection module is used to detect whether the air conditioner is in the cooling anti-direct-blow mode, and also to detect the current deflection position of the air guide plate. The control module is used to receive data output by the detection module and output corresponding control commands to the time-sharing frequency control module and the air volume compensation module according to the received data; The time-sharing frequency control module is used to execute the time-sharing frequency limiting control logic of any one of claims 1-8, and control the compressor to operate at the corresponding highest frequency limit value in different time periods; The air volume compensation module is used to execute the air volume compensation control logic of any one of claims 1-8, calculate the target compensation speed of the indoor fan based on the current deflection position of the air guide plate, and control the indoor fan to run at the target compensation speed.

10. The anti-condensation control device for a wall-mounted inverter air conditioner as described in claim 9, characterized in that, The control device also includes a storage module, which stores the highest frequency limit corresponding to each windshield of the indoor fan, and stores a pre-established correspondence table between the deflection position of the air guide plate and the air volume compensation parameters.

Images