Automobile air conditioner condensate water formation test method

Abstract

The invention discloses an automobile air conditioner condensate water formation testing method, and belongs to the technical field of automobile heat management. According to the method, the forming and discharging process of air conditioner condensate water is dynamically monitored through a double-electronic-scale system, an air conditioner assembly is installed on a testing platform connected with a first electronic scale, and the weight change of the air conditioner assembly is measured; the drainage pipe is connected to a collection container on the second electronic scale, the accumulated weight of the condensate water is measured, and the instantaneous drainage flow is calculated; generating hyperbolic curve feature maps of a weight-time curve and a drainage flow-time curve of the air conditioner assembly in the same coordinate system; parameters such as water film forming time, peak water storage capacity, water hanging capacity and peak and balance state difference are analyzed and determined, and a three-level water flying risk assessment standard is established. Dynamic quantitative monitoring of the condensate water forming process is achieved, the water flying risk of an air conditioner product can be accurately predicted and evaluated, and a scientific testing means is provided for solving the water flying problem of an automobile air conditioner.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobile thermal management, and particularly relates to a test method for automobile air conditioner condensate water formation. BACKGROUND

[0002] During the refrigeration operation of an automobile air conditioner, a large amount of condensate water is formed on the surface of the evaporator fins when the air in the passenger compartment is rapidly cooled and the temperature is lower than the dew point. Ideally, the condensate water should flow along the fin and heat dissipation pipe wall surface, collect in the water collection tray at the bottom of the air conditioner, and be discharged outside the vehicle through the drain hole. However, in actual use, especially in hot summer, the "flying water" phenomenon often occurs - the condensate water does not drain as scheduled, but splashes into the passenger compartment through the air outlet or the glove box air outlet, causing user complaints. The flying water phenomenon is closely related to factors such as the surface coating treatment of the evaporator, the air conditioner drainage structure, the uniformity of the air outlet, and the local air speed, especially when a large amount of condensate water is rapidly formed in the one-key MAX refrigeration mode.

[0003] The prior art mainly uses the following test methods: (1) Evaporator hydrophilicity test: the contact angle of water droplets on the surface of aluminum fins is measured to evaluate the hydrophilic performance. This method requires high precision, strict requirements for operators, environment and equipment, and large differences in test results between different manufacturers. Moreover, it is a static test with large sampling error, only a part-level test, and cannot represent the actual drainage characteristics of the air conditioner assembly.

[0004] (2) Evaporator condensate water formation test: the air conditioner assembly is weighed after running for 15 minutes under the rated dry operating condition, and then weighed again after running for 30 minutes under the wet operating condition. The amount of condensate water formation is evaluated by the weight difference. This method only measures the difference after the stable state, when a stable water film has been formed on the surface of the evaporator, and cannot reflect the dynamic formation process of the condensate water.

[0005] (3) Air conditioner flying water test: the air conditioner is run at different air volumes and inclination angles to observe whether water flies out. This method can only qualitatively determine whether water flies, cannot quantitatively evaluate the flying water risk level, and cannot reflect the dynamic characteristics of the initial formation stage of the water film.

[0006] The main problems of the above-mentioned prior art are: static or stable state test, unable to dynamically monitor the complete process from condensate water formation to drainage; lack of quantitative evaluation parameters and standards; unable to accurately predict and evaluate the flying water risk level of the air conditioner product. Therefore, it is urgent to develop a method that can dynamically and quantitatively test and evaluate the condensate water formation characteristics of the automobile air conditioner. SUMMARY

[0007] The purpose of the present application is to solve the problems in the background art and provide a test method for automobile air conditioner condensate water formation.

[0008] The technical scheme adopted by the present application is: a test method for condensate water formation of an automobile air conditioner, comprising the following steps: installing an air conditioner assembly on a test platform, the test platform being connected with a first electronic scale at the bottom for measuring the weight change of the air conditioner assembly; connecting a drain pipe at the bottom of the air conditioner assembly to a collection container, the collection container being placed on a second electronic scale for measuring the accumulated weight of the discharged condensate water; connecting an evaporator of the air conditioner assembly with a refrigerant supply circuit, setting the inlet air parameters and the refrigerant parameters according to the rated operating conditions; starting the compressor and simultaneously starting data acquisition, dynamically recording the air conditioner assembly weight data of the first electronic scale and the condensate water accumulated weight data of the second electronic scale, calculating the instantaneous drainage flow rate based on the condensate water accumulated weight data; generating a hyperbolic characteristic map in the same coordinate system, including an air conditioner assembly weight-time curve generated based on the first electronic scale data and a drainage flow rate-time curve generated based on the instantaneous drainage flow rate; determining the water film formation time, the peak water storage capacity, the water hanging amount and the peak and equilibrium state difference value through comparative analysis of the hyperbolic characteristic map, and establishing a splashing risk evaluation standard according to the above parameters.

[0009] More preferably, the calculation method of the instantaneous drainage flow rate is: performing time differentiation processing on the condensate water accumulated weight data measured by the second electronic scale to obtain the instantaneous drainage flow rate.

[0010] More preferably, the water film formation time is defined as the time interval from the start of the compressor to the first detection of the drain by the second electronic scale; the peak water storage capacity is defined as the maximum value of the air conditioner assembly weight-time curve; the water hanging amount is defined as the difference between the peak water storage capacity and the initial weight, reflecting the maximum water storage capacity of the evaporator surface; and the peak and equilibrium state difference value is defined as the difference between the peak water storage capacity and the air conditioner assembly weight after the drainage stabilizes.

[0011] More preferably, the splashing risk evaluation standard is based on the water film formation time and the peak and equilibrium state difference value, and is divided into three levels: no water splashing air conditioner: the peak and equilibrium state difference value is ≤10g, the water film formation time is ≤350 seconds, and the drainage flow rate-time curve is smooth without mutation; weak water splashing air conditioner: the peak and equilibrium state difference value is >10g and <200g, the water film formation time is >350 seconds and <600 seconds, and the drainage flow rate-time curve has local mutations; water splashing air conditioner: the peak and equilibrium state difference value is ≥200g, the water film formation time is ≥600 seconds, and the drainage flow rate-time curve has a significant mutation peak.

[0012] More preferably, the specific calculation formula of the peak and equilibrium state difference value is: peak and equilibrium state difference value = W peak -W stable , wherein W peak is the peak water storage capacity of the air conditioner assembly weight-time curve, and W stableThe average weight of the air conditioning assembly after drainage reaches a stable state is calculated by taking the average value of the data within 30 seconds after stabilization.

[0013] Preferably, the first electronic scale has a measurement accuracy of 1g and a measurement range of not less than 15kg; the second electronic scale has a measurement accuracy of 0.1g and a measurement range of not less than 5kg.

[0014] Preferably, the data acquisition frequency is 1 set of data per second, and the continuous recording time is not less than 1200 seconds; both the first and second electronic scales are connected to the computer for communication and real-time transmission of measurement data; the data processing software in the computer automatically completes the following functions: real-time data acquisition and storage, automatic identification of water film formation time point, automatic calculation of peak water storage, hanging water volume and balance state, generation of hyperbola feature graph, and automatic determination of water splash risk level.

[0015] Preferably, the air inlet parameters include: air inlet volume, air inlet temperature 27±2℃, and relative humidity 50±5%; the refrigerant parameters include: refrigerant valve inlet pressure, valve inlet temperature, evaporator outlet pressure, and evaporation temperature 2-5℃; after connecting the refrigerant supply circuit, the evaporator is first evacuated and pressure maintained for 30 minutes. After confirming that there is no leakage, the valve is opened to fill the evaporator with refrigerant.

[0016] Preferably, the test method is particularly suitable for verifying the water spray characteristics of an air conditioner in one-touch MAX cooling mode, and is applicable to both traditional automotive air conditioning and new energy vehicle heat pump air conditioning systems.

[0017] Preferably, the amount of water hanging is related to the difference between the peak value and the equilibrium state: when the amount of water hanging is ≤200g, it corresponds to the non-splattering air conditioning characteristic; when the amount of water hanging is >200g and ≤400g, it corresponds to the slight splattering air conditioning characteristic; when the amount of water hanging is >400g, it corresponds to the splattering air conditioning characteristic; wherein, the larger the amount of water hanging, the stronger the water storage capacity of the evaporator surface, the less likely the water film is to be discharged in time, and the higher the risk of splattering.

[0018] Compared with the prior art, the present invention has the following beneficial effects: Dynamic monitoring capability: The dual electronic scale system monitors the weight and drainage changes of the air conditioning assembly in real time, and records the entire process of condensate from formation and accumulation to discharge, overcoming the shortcomings of existing technologies that can only perform static or steady-state tests.

[0019] Quantitative assessment system: Multiple quantitative parameters have been established, including water film formation time, peak water storage, water hanging volume, and the difference between peak and equilibrium state. A clear three-level flying water risk assessment standard has been formed (no flying water, slight flying water, and flying water), transforming the original qualitative judgment into quantitative assessment.

[0020] Hyperbolic Feature Analysis: Innovatively, the weight-time curve and drainage flow-time curve of the air conditioning assembly are generated in the same coordinate system. Through hyperbolic comparative analysis, the dynamic characteristics of condensate are intuitively reflected, making it easier to identify the risk characteristics of water overflow.

[0021] High-precision automated testing: The system employs dual electronic scales with different accuracies (1g and 0.1g), combined with high-frequency data recording and automated analysis software that collects data every second, improving testing accuracy and efficiency while reducing human error.

[0022] System-level assessment: Testing is conducted at the air conditioning assembly level, rather than just at the evaporator component. The test results are closer to actual usage conditions, and the assessment is more accurate and reliable.

[0023] Wide applicability: The test method is applicable to both traditional automotive air conditioning and new energy vehicle heat pump air conditioning systems, and is particularly suitable for verifying the water splashing characteristics in the one-button MAX cooling mode, demonstrating good versatility.

[0024] Early warning function: The water storage capacity of the evaporator surface can be assessed by the water discharge parameter, and the risk of water splashing can be predicted during the design stage, which helps to optimize product design and reduce customer complaints later.

[0025] High testing efficiency: Multiple key parameters can be obtained in one test, and all data collection can be completed within 20 minutes, which greatly improves efficiency compared to the traditional method of multiple tests. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the automotive air conditioning condensate formation test system of the present invention; Figure 2 This is a hyperbolic feature graph of the water-cooled air conditioner product in Embodiment 1 of the present invention, showing the test results of air conditioner product 1#; Figure 3 This is a hyperbolic feature graph of the weak water-spraying type air conditioner product in Embodiment 2 of the present invention, showing the test results of air conditioner product #2; Figure 4 This is a hyperbolic feature graph of the non-water-spraying air conditioner product in Embodiment 3 of the present invention, showing the test results of air conditioner product 3; In the diagram, 1-air conditioning assembly, 2-test platform, 3-first electronic scale, 4-second electronic scale, 5-collection container. Detailed Implementation

[0027] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] like Figure 1 As shown, the present invention discloses a method for testing the formation of condensate in an automotive air conditioning system, comprising the following steps: Installing an air conditioning assembly 1 on a test platform 2, with a first electronic scale 3 connected to the bottom of the test platform 2 for measuring the weight change of the air conditioning assembly 1; connecting a drain pipe at the bottom of the air conditioning assembly 1 to a collection container 5, with the collection container 5 placed on a second electronic scale 4 for measuring the cumulative weight of the discharged condensate; connecting the evaporator of the air conditioning assembly 1 to the refrigerant supply circuit, and setting the air intake parameters and refrigerant parameters according to rated operating conditions; starting the compressor and simultaneously beginning data acquisition, dynamically recording the air conditioning assembly weight data from the first electronic scale and the cumulative condensate weight data from the second electronic scale, and calculating the instantaneous drainage flow rate based on the cumulative condensate weight data; generating a hyperbolic feature graph in the same coordinate system, including an air conditioning assembly weight-time curve generated based on the data from the first electronic scale and a drainage flow rate-time curve generated based on the instantaneous drainage flow rate; determining the water film formation time, peak water storage capacity, hanging water volume, and the difference between the peak and equilibrium states through comparative analysis of the hyperbolic feature graphs, and establishing a splash risk assessment standard based on the above parameters.

[0029] The instantaneous drainage flow rate is calculated by performing time differentiation on the cumulative weight data of condensate measured by the second electronic scale to obtain the instantaneous drainage flow rate.

[0030] The water film formation time is defined as the time interval from compressor startup to the first detection of drainage by the second electronic scale; the peak water storage capacity is defined as the maximum value of the air conditioning assembly weight-time curve; the water retention capacity is defined as the difference between the peak water storage capacity and the initial weight, reflecting the maximum water storage capacity of the evaporator surface; the difference between the peak value and the equilibrium state is defined as the difference between the peak water storage capacity and the weight of the air conditioning assembly after drainage stabilizes.

[0031] The splash risk assessment criteria are based on the water film formation time and the difference between the peak value and the equilibrium state, and are divided into three levels: No splashing air conditioner: the difference between the peak value and the equilibrium state is ≤10g, the water film formation time is ≤350 seconds, and the drainage flow-time curve is stable without abrupt changes; Slight splashing air conditioner: the difference between the peak value and the equilibrium state is >10g and <200g, the water film formation time is >350 seconds and <600 seconds, and the drainage flow-time curve shows local abrupt changes; Splashing air conditioner: the difference between the peak value and the equilibrium state is ≥200g, the water film formation time is ≥600 seconds, and the drainage flow-time curve shows a significant abrupt peak change.

[0032] The specific formula for calculating the difference between the peak value and the equilibrium state is: Difference between peak value and equilibrium state = W peak -W stable Among them, W peak W represents the peak water storage capacity of the air conditioning assembly's weight-time curve.stable The average weight of the air conditioning assembly after drainage reaches a stable state is calculated by taking the average value of the data within 30 seconds after stabilization.

[0033] The first electronic scale has a measurement accuracy of 1g and a measurement range of not less than 15kg; the second electronic scale has a measurement accuracy of 0.1g and a measurement range of not less than 5kg.

[0034] The data acquisition frequency is 1 set of data per second, and the continuous recording time is not less than 1200 seconds; both the first and second electronic scales are connected to the computer for real-time transmission of measurement data; the data processing software in the computer automatically completes the following functions: real-time data acquisition and storage, automatic identification of water film formation time point, automatic calculation of peak water storage, hanging water volume and balance state, generation of hyperbola feature graph, and automatic determination of water splash risk level.

[0035] The air intake parameters include: air intake volume, air intake temperature 27±2℃, and relative humidity 50±5%; the refrigerant parameters include: refrigerant valve inlet pressure, valve inlet temperature, evaporator outlet pressure, and evaporation temperature 2-5℃; after connecting the refrigerant supply circuit, the evaporator is first evacuated and pressure maintained for 30 minutes. After confirming that there is no leakage, the valve is opened to fill the evaporator with refrigerant.

[0036] The test method is particularly suitable for verifying the water spray characteristics of air conditioners in one-button MAX cooling mode, and is applicable to both traditional automotive air conditioners and new energy vehicle heat pump air conditioner systems.

[0037] The amount of water hanging is related to the difference between the peak value and the equilibrium state: when the amount of water hanging is ≤200g, it corresponds to the non-splattering air conditioning characteristic; when the amount of water hanging is >200g and ≤400g, it corresponds to the slight splattering air conditioning characteristic; when the amount of water hanging is >400g, it corresponds to the splattering air conditioning characteristic. Among them, the larger the amount of water hanging, the stronger the water storage capacity of the evaporator surface, the less likely the water film is to be discharged in time, and the higher the risk of splattering. Example

[0038] like Figure 2 As shown, air conditioner product #1 (water-flying type) Test data characteristics: Water film formation time: 620s (from compressor start-up to the start of drainage). Peak water storage: 11768g (approximately 570s); Equilibrium weight: 11477g (approximately 1000s); Difference between peak value and equilibrium state: 291g; Infusion volume: 11768g - 11446g = 322g; Peak drainage flow rate: 1.16 g / s; Drainage characteristics: A large flow of water suddenly began to drain at 620s, and the flow curve showed a clear abrupt peak. Analysis of the phenomenon: During the initial operation (0-620s), the air conditioner discharged almost no water, and a large amount of condensate accumulated on the surface of the evaporator, forming a thick water film. When the accumulated water reached a critical value, it was suddenly released in large quantities, causing a surge in instantaneous drainage flow, which easily resulted in water splashing. Example

[0039] like Figure 3 As shown, air conditioner product #2 (slight water splashing type) Test data characteristics: Water film formation time: 603s - 30s = 573s (minus the initial 30s delay); Peak water storage: 12408g (approximately 670s); Equilibrium weight: 12269g (approximately 1000s); Difference between peak value and equilibrium state: 139g; Infusion volume: 12408g - 12079g = 329g; Peak drainage flow rate: 1.28 g / s; Drainage characteristics: Drainage begins at 600s, and the flow rate curve shows local abrupt changes; Analysis of the phenomenon: The water film formation time of this air conditioner is relatively long, and there is a certain degree of water film accumulation, but the amount of accumulation is relatively small. Although there is a sudden change in flow rate after drainage begins, the difference between the peak value and the equilibrium state is small, indicating that the release of stored water is relatively gentle, and the risk of water splashing is moderate. Example

[0040] like Figure 4 As shown, air conditioner product #3 (non-spraying type) Test data characteristics: Water film formation time: 350s - 30s = 320s (minus the initial 30s delay); Peak water storage: 13418g (approximately 350s); Equilibrium weight: 13417g (approximately 600s); Difference between peak value and equilibrium state: 1g; Infusion volume: 13418g - 13240g = 178g; Peak drainage flow rate: 0.42 g / s; Drainage characteristics: Stable drainage begins after 350 seconds, with the flow rate curve rising steadily without abrupt changes; Analysis of the phenomenon: The water film formed rapidly in this air conditioner, and the condensate was discharged almost simultaneously, with no water film accumulation. The drainage flow rate increased steadily and the curve was smooth, indicating that the drainage was unobstructed and there was no risk of water splashing.

[0041] Comparative analysis Key Parameter Comparison Table

[0042] The water film formation time is positively correlated with the risk of water splash: the longer the formation time (620s>573s>320s), the higher the risk of water splash. The difference between the peak value and the equilibrium state is a key indicator for water release: the larger the difference (291g>139g>1g), the more severe the water film accumulation, and the greater the possibility of sudden release; The characteristics of the drainage flow curve directly reflect the risk of water overflow: the smoother the curve, the lower the risk of water overflow.

[0043] This testing method successfully distinguished three air conditioning products with different water splashing characteristics: Quantitative differentiation capability: The three products can be clearly distinguished by two core parameters: water film formation time (320s vs 573s vs 620s) and the difference between peak and equilibrium state (1g vs 139g vs 291g). Advantages of dynamic monitoring: The hyperbolic feature graph intuitively shows the complete dynamic process of condensate formation and accurately captures the sudden drainage phenomenon of product #1 at 620s; Prediction accuracy: The test parameters closely match the actual water flow performance; This test method, through actual verification with three typical products, fully demonstrates its scientific validity, accuracy, and practicality in evaluating the condensate formation characteristics of automotive air conditioning systems, providing an effective technical means to solve the problem of water splashing that has plagued the industry.

[0044] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this specification belong to prior art known to those skilled in the art.

Claims

1. A method for testing the formation of condensate in automotive air conditioning systems, characterized in that: Includes the following steps: An air conditioning assembly is mounted on a test platform, with a first electronic scale connected to the bottom of the platform to measure the weight change of the air conditioning assembly. A drain pipe at the bottom of the air conditioning assembly is connected to a collection container, which is placed on a second electronic scale to measure the cumulative weight of the discharged condensate. The evaporator of the air conditioning assembly is connected to the refrigerant supply circuit, and the air intake parameters and refrigerant parameters are set according to rated operating conditions. The compressor is started, and data acquisition begins simultaneously, dynamically recording the air conditioning assembly weight data from the first electronic scale and the cumulative condensate weight data from the second electronic scale. The instantaneous drainage flow rate is calculated based on the cumulative condensate weight data. A hyperbolic feature graph is generated in the same coordinate system, including an air conditioning assembly weight-time curve generated based on the first electronic scale data and a drainage flow rate-time curve generated based on the instantaneous drainage flow rate. Through comparative analysis of the hyperbolic feature graphs, the water film formation time, peak water storage capacity, hanging water volume, and the difference between the peak and equilibrium state are determined, and a splash risk assessment standard is established based on the above parameters.

2. The method for testing the formation of condensate in an automotive air conditioner according to claim 1, characterized in that: The instantaneous drainage flow rate is calculated by performing time differentiation on the cumulative weight data of condensate measured by the second electronic scale to obtain the instantaneous drainage flow rate.

3. The method for testing the formation of condensate in an automotive air conditioner according to claim 1, characterized in that: The water film formation time is defined as the time interval from compressor startup to the first detection of drainage by the second electronic scale; the peak water storage capacity is defined as the maximum value of the air conditioning assembly weight-time curve; the water retention capacity is defined as the difference between the peak water storage capacity and the initial weight, reflecting the maximum water storage capacity of the evaporator surface; the difference between the peak value and the equilibrium state is defined as the difference between the peak water storage capacity and the weight of the air conditioning assembly after drainage stabilizes.

4. The method for testing the formation of condensate in an automotive air conditioner according to claim 1, characterized in that: The splash risk assessment criteria are based on the water film formation time and the difference between the peak value and the equilibrium state, and are divided into three levels: No splashing air conditioner: the difference between the peak value and the equilibrium state is ≤10g, the water film formation time is ≤350 seconds, and the drainage flow-time curve is stable without abrupt changes; Slight splashing air conditioner: the difference between the peak value and the equilibrium state is >10g and <200g, the water film formation time is >350 seconds and <600 seconds, and the drainage flow-time curve shows local abrupt changes; Splashing air conditioner: the difference between the peak value and the equilibrium state is ≥200g, the water film formation time is ≥600 seconds, and the drainage flow-time curve shows a significant abrupt peak change.

5. The method for testing the formation of condensate in an automotive air conditioner according to claim 3, characterized in that: The specific formula for calculating the difference between the peak value and the equilibrium state is: Difference between peak value and equilibrium state = W peak -W stable Among them, W peak W represents the peak water storage capacity of the air conditioning assembly's weight-time curve. stable The average weight of the air conditioning assembly after drainage reaches a stable state is calculated by taking the average value of the data within 30 seconds after stabilization.

6. The method for testing the formation of condensate in an automotive air conditioner according to claim 1, characterized in that: The first electronic scale has a measurement accuracy of 1g and a measurement range of not less than 15kg; the second electronic scale has a measurement accuracy of 0.1g and a measurement range of not less than 5kg.

7. The method for testing the formation of condensate in an automotive air conditioner according to claim 1, characterized in that: The data acquisition frequency is 1 set of data per second, and the continuous recording time is not less than 1200 seconds; both the first and second electronic scales are connected to the computer for real-time transmission of measurement data; the data processing software in the computer automatically completes the following functions: real-time data acquisition and storage, automatic identification of water film formation time point, automatic calculation of peak water storage, hanging water volume and balance state, generation of hyperbola feature graph, and automatic determination of water splash risk level.

8. The method for testing the formation of condensate in an automotive air conditioner according to claim 1, characterized in that: The air intake parameters include: air intake volume, air intake temperature 27±2℃, and relative humidity 50±5%; the refrigerant parameters include: refrigerant valve inlet pressure, valve inlet temperature, evaporator outlet pressure, and evaporation temperature 2-5℃; after connecting the refrigerant supply circuit, the evaporator is first evacuated and pressure maintained for 30 minutes. After confirming that there is no leakage, the valve is opened to fill the evaporator with refrigerant.

9. The method for testing the formation of condensate in an automotive air conditioner according to claim 1, characterized in that: The test method is particularly suitable for verifying the water spray characteristics of air conditioners in one-button MAX cooling mode, and is applicable to both traditional automotive air conditioners and new energy vehicle heat pump air conditioner systems.

10. A method for testing the formation of condensate in an automotive air conditioner according to claim 4, characterized in that: The amount of water hanging is related to the difference between the peak value and the equilibrium state: when the amount of water hanging is ≤200g, it corresponds to the non-splattering air conditioning characteristic; when the amount of water hanging is >200g and ≤400g, it corresponds to the slight splattering air conditioning characteristic; when the amount of water hanging is >400g, it corresponds to the splattering air conditioning characteristic. Among them, the larger the amount of water hanging, the stronger the water storage capacity of the evaporator surface, the less likely the water film is to be discharged in time, and the higher the risk of splattering.

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