Multi-connected air conditioner water pump control method and system based on condensate water level monitoring

Abstract

A multi-connected air conditioner water pump control method based on condensate water level monitoring comprises the following steps that S1, the starting number and the starting temperature of indoor units are obtained, the time when the water level in a condensate water tank reaches a set threshold value is determined based on the starting number and the starting temperature, and the time serves as the starting time of a water pump; and S2, when the starting time is up, the water level in the condensation water tank is detected, and the starting power of the water pump is adjusted based on the relation between the water level and a set threshold value. In addition, the starting power can be adjusted according to the relation between the water level of the condensate water tank and the set threshold value when the starting time is up, so that it is ensured that the water pump can continuously pump water, and the situation that the water pump idles or condensate water overflows is avoided. And the service life and the practicability of the water pump in the multi-connected air conditioner are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, in particular to a control method and system for a multi-connected air conditioner water pump based on condensate water level monitoring. Background Art

[0002] In a multi-connected air conditioner, the drain branches of each indoor unit converge into the same condensate water tank, and during operation, the condensate water flows into the condensate water tank through the drain branches. A main drain pipe and a water pump connected thereto are provided in the condensate water tank. The water in the condensate water tank is pumped out by the operation of the water pump, so as to prevent excessive condensate water in the condensate water tank.

[0003] In the operation of existing multi-connected air conditioners, usually the water pump starts with the start of the air conditioner. However, since some water pumps are constant power water pumps, at the initial stage of air conditioner operation, the amount of condensate water is small, and at this time the water pump is usually in an idling state, which affects the life of the water pump. When multiple indoor units start and when the operation time of the air conditioner is long, the amount of condensate water will increase, and the water pump cannot drain the condensate water in time. At this time, the condensate water may leak along the inner machine shell or pipe gap to the wall and floor, forming water stains. Therefore, how to effectively control the start time and operating power of the water pump has become an urgent problem to be solved. Summary of the Invention

[0004] Aiming at the above defects, the purpose of the present invention is to provide a control method and system for a multi-connected air conditioner water pump based on condensate water level monitoring, so that the water pump can operate at a specific frequency within a specified time to avoid the occurrence of idling of the water pump.

[0005] To achieve this purpose, the present invention adopts the following technical solutions: A control method for a multi-connected air conditioner water pump based on condensate water level monitoring, including the following steps:

[0006] Step S1: Obtain the start number and start temperature of the indoor unit, and determine the time when the water level in the condensate water tank reaches the set threshold based on the start number and start temperature, and use this time as the start time of the water pump;

[0007] Step S2: When the start time arrives, detect the water level in the condensate water tank, and adjust the start power of the water pump based on the relationship between the water level and the set threshold.

[0008] Preferably, the steps of step S1 are as follows:

[0009] Step S11: Calculate the first target power of the indoor unit based on the start temperature of the indoor unit;

[0010] Step S12: Select the corresponding proportion of the second target power according to the current outdoor temperature;

[0011] Step S13: Calculate the water output rate of the condensate water of a single indoor unit based on the first real-time compliance power and the second load power;

[0012] Step S14: Statistically calculate the water output rates of all indoor units as the total water output rate, and based on the relationship between the total water output rate and the set threshold, obtain the time when the condensate water reaches the set threshold.

[0013] Preferably, the step of calculating the first target power of the indoor unit based on the startup temperature in step S11 includes: obtaining the first temperature difference using the startup temperature and the indoor temperature, and obtaining the first target power based on the first temperature difference, the response duration of the indoor unit, and the maximum power;

[0014] Among them, the formula for obtaining the first target power is as follows:

[0015] Among them, k1 is the load correction parameter, with a value range of 0.8 to 1.2, P max is the maximum power, ΔTi is the first temperature difference of the i-th indoor unit, and τ is the temperature response time constant, with a value range of 2 to 5.

[0016] Preferably, the second target power in step S12 is the product of the corresponding relationship and the average value of the first target power;

[0017] Among them, the corresponding relationship is proportional to the outdoor temperature.

[0018] Preferably, the formula for obtaining the water output rate of the condensate water of a single indoor unit in step S13 is as follows: W i =k2(P 1i *α + P2*β)*cop;

[0019] Among them, k2 is the condensate water generation coefficient, α and β are proportionality coefficients respectively, P 1i is the first target power of the i-th indoor unit, P2 is the second target power, and cop is the air conditioner energy efficiency ratio.

[0020] Preferably, the specific steps of step S2 are as follows:

[0021] Step S21: Input the total water output rate into the water pump simulation model, and output the initial power of the water pump through the water pump simulation model;

[0022] Step S22: Obtain the water level difference between the water level in the condensate water tank and the set threshold, and determine whether the water level difference falls within the water level threshold. If the water level difference does not fall within the water level threshold, obtain the ratio between the water level difference and the set threshold as the adjustment ratio, and adjust the initial power with the adjustment ratio, and use the adjusted power as the startup power of the water pump. If the water level difference falls within the water level threshold, use the initial power as the startup power of the water pump.

[0023] A multi-connected air-conditioning water pump control system based on condensate water level monitoring. When using the multi-connected air-conditioning water pump control system based on condensate water level monitoring, it includes a time determination module and a power determination module;

[0024] The time determination module is used to obtain the startup quantity and startup temperature of the indoor unit, determine the time when the water level in the condensate water tank reaches the set threshold based on the startup quantity and startup temperature, and use this time as the startup time of the water pump;

[0025] The power determination module is used to detect the water level in the condensate water tank when the startup time arrives, and adjust the startup power of the water pump based on the relationship between the water level and the set threshold.

[0026] Preferably, the time determination module includes a first power determination sub-module, a second power determination sub-module, an indoor unit water output rate determination sub-module, and a time calculation sub-module;

[0027] The first power determination sub-module calculates the first target power of the indoor unit based on the startup temperature of the indoor unit;

[0028] The second power determination sub-module is used to select the corresponding proportion of the second target power according to the current outdoor temperature;

[0029] The indoor unit water output rate determination sub-module is used to calculate the water output rate of the condensate water of a single indoor unit through the first real-time compliance power and the second load power;

[0030] The time calculation sub-module is used to count the water output rates of all indoor units as the total water output rate, and obtain the time when the condensate water reaches the set threshold based on the relationship between the total water output rate and the set threshold.

[0031] Preferably, the power determination module includes an initial power sub-module and an adjustment sub-module;

[0032] The initial power sub-module is used to input the total water output rate into the water pump simulation model, and output the initial power of the water pump through the water pump simulation model;

[0033] The adjustment sub-module is used to obtain the water level difference between the water level in the condensate water tank and the set threshold, determine whether the water level difference falls within the water level threshold. If the water level difference does not fall within the water level threshold, obtain the proportion between the water level difference and the set threshold as the adjustment proportion, and adjust the initial power with the adjustment proportion, and use the adjusted power as the startup power of the water pump. If the water level difference falls within the water level threshold, use the initial power as the startup power of the water pump.

[0034] One of the technical solutions in the above technical solutions has the following advantages or beneficial effects: When the prediction time arrives, there may be an error between the water level and the set threshold. If the water pump is controlled only by the initially set frequency, when the operation time becomes longer, the water in the condensation water tank may become less or overflow. Therefore, in the present invention, the starting power is adjusted according to the relationship between the water level in the condensation water tank and the set threshold when the starting time arrives, so as to ensure that the water pump can continuously pump water, thereby avoiding the situation of the water pump idling or the condensation water overflowing. Greatly improves the service life and practicality of the water pump in the multi-connected air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a flowchart of an embodiment of the method of the present invention.

[0036] Figure 2 is a schematic structural diagram of an embodiment of the system of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The following details the embodiments of the present invention. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0038] In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "a plurality of" means two or more. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] As Figures 1 - 2 shown, a multi-connected air conditioner water pump control method based on condensate water level monitoring includes the following steps:

[0041] Step S1: Obtain the startup quantity and startup temperature of the indoor unit, determine the time when the water level in the condensate water tank reaches the set threshold based on the startup quantity and startup temperature, and use this time as the startup time of the water pump;

[0042] Step S2: When the startup time arrives, detect the water level in the condensate water tank, and adjust the startup power of the water pump based on the relationship between the water level and the set threshold.

[0043] Currently, when an air conditioner starts up, it will correspondingly start the water pump to extract condensate water, avoiding the accumulation of condensate water, so that the condensate water leaks along the inner shell of the indoor unit or the pipe gap to the wall and floor, forming water stains. However, in the initial stage of air conditioner operation, the amount of condensate water is small, and at this time the water pump is usually in an idling state, affecting the service life of the water pump. Therefore, in the present invention, the startup temperature of each indoor unit, that is, the air conditioner temperature set by the user, will be collected, and the startup quantity of the indoor unit will also be collected. Because different startup temperatures affect the respective powers of different indoor units, thus affecting the generation speed of condensate water, and the startup quantity of the indoor unit will also affect the generation speed of condensate water. Wherein the set threshold is the set water level in the condensate water tank. By the startup quantity and startup temperature, the generation speed of condensate water is determined, and the water pump is started only when the amount of condensate water reaches the set threshold. At this time, the situation of the water pump idling due to too little condensate water will not occur, nor will the situation of overflow occur due to too much condensate water. Preferably, the set threshold is generally set to 1 / 2 or 3 / 4 of the condensate water tank. At this time, a certain processing capacity can be left empty to avoid problems that may occur in the exhaust systems of some indoor units, resulting in an increase in the amount of condensate water.

[0044] Although it is predicted that when the startup time arrives, the water level in the condensate water tank will reach the set threshold, due to the inability to know the maintenance situation of the indoor unit, when the predicted time arrives, there may be an error between the water level and the set threshold. If the water pump is only controlled by the initially set frequency, when the operation time becomes longer, the water in the condensate water tank may become less or overflow. Therefore, in the present invention, the startup power will also be adjusted according to the relationship between the water level in the condensate water tank and the set threshold when the startup time arrives, so as to ensure that the water pump can continuously pump water, thus avoiding the situations of the water pump idling or condensate water overflowing. Greatly improves the service life and practicability of the water pump in a multi-connected air conditioner.

[0045] Preferably, the steps of step S1 are as follows:

[0046] Step S11: Calculate the first target power of the indoor unit based on the startup temperature of the indoor unit;

[0047] Step S12: Select the second target power corresponding to the current outdoor temperature according to the ratio;

[0048] Step S13: Calculate the water discharge rate of the condensate water of a single indoor unit based on the first real-time compliance power and the second load power;

[0049] Step S14: Statistically calculate the water discharge rates of all indoor units as the total water discharge rate, and based on the relationship between the total water discharge rate and the set threshold, obtain the time when the condensate water reaches the set threshold.

[0050] Since the amount of condensate water is positively correlated with the cooling capacity, the greater the cooling capacity, the more condensation on the evaporator surface. Therefore, the condensate water is related to the operating power of the air conditioner. In a multi-connected air conditioner, there are multiple indoor units and a shared outdoor unit. Therefore, when considering the condensate water, it is necessary to consider the first target power of the indoor unit operation and the second target power of the outdoor unit operation.

[0051] During the operation of the indoor unit, when the difference between the indoor temperature and the starting temperature is smaller, the load of the indoor unit is smaller, and the corresponding first target power is smaller. Therefore, the first difference can be obtained through the starting temperature and the indoor temperature, and the first target power can be obtained through the first difference and the operating parameters of the indoor unit (the corresponding duration of the indoor unit).

[0052] The outdoor unit is installed outdoors, and the outdoor climate environment will also affect the operating power of the outdoor unit. Because when the outdoor temperature is higher, the air conditioner's heat dissipation efficiency is lower, and additional power is required for heat dissipation. Therefore, in the present invention, the corresponding ratio is selected through the outdoor temperature, and the second target power is obtained through the corresponding ratio and multiple first target powers.

[0053] When the first target power and the second target power are known, the amount of condensate water generated during the operation of a single indoor unit can be obtained. Then, statistically calculate the water discharge rates of all started indoor units as the total water discharge rate. Finally, divide the difference between the set threshold and the remaining amount in the condensate water tank by the total water discharge rate to obtain the time when the condensate water reaches the set threshold.

[0054] Preferably, the step of calculating the first target power of the indoor unit based on the starting temperature of the indoor unit in step S11 includes: obtaining the first temperature difference using the starting temperature and the indoor temperature, and obtaining the first target power based on the first temperature difference, the response duration of the indoor unit, and the maximum power;

[0055] The formula for obtaining the first target power is as follows:

[0056] where k1 is the load correction parameter, with a value range of 0.8 to 1.2, P max is the maximum power, ΔTi is the first temperature difference of the i-th indoor unit, and τ is the temperature response time constant, with a value range of 2 to 5.

[0057] Preferably, the second target power in the step S12 is the product of the corresponding relationship and the average value of the first target power;

[0058] The corresponding relationship is directly proportional to the outdoor temperature.

[0059] The selection of the corresponding ratio is as follows:

[0060]

[0061]

[0062] Preferably, the formula for obtaining the water discharge rate of the condensate water of a single indoor unit in the step S13 is as follows: W i = k2(P 1i *α + P2*β)*cop;

[0063] where k2 is the condensate water generation coefficient, α and β are the proportionality coefficients respectively, P 1i is the first target power of the i-th indoor unit, P2 is the second target power, and cop is the air conditioner energy efficiency ratio (cooling capacity / input power).

[0064] Example 1:

[0065] A multi-connected air-conditioning system is installed in an office building, including 15 indoor units. The threshold of the condensate water tank is 20L, the current water volume is 5L, and the set threshold is 10L. At this time, 5 indoor units are started. At this time, the indoor temperature of the first indoor unit is 28°C, the set start temperature by the user is 22°C, the maximum power of the first indoor unit is 5kW, k1 = 1.0, τ = 3. At this time, P 1i = 1*5*(1 - e -2 ) ≈ 4.32kW. The first target power of other indoor units is obtained successively by this method.

[0066] Assume that the average value of the first target power is 4.32kW, and the current outdoor temperature is 38°C. By querying the corresponding relationship table, it is known that the corresponding ratio η is 1.6, and the second target power is 6.91kW. Assume that α and β are 0.7 and 0.3 respectively, and cop is 3, and k2 is 0.2. At this time, the water discharge rate of the condensate water of a single indoor unit is calculated as follows:

[0067] W1 = 0.2*(4.32*0.7 + 6.19*0.3)*3 ≈ 2.9L / h. Assume that the water discharge rates of the other 5 units are all 2.9L / h. At this time, the total water discharge rate is 14.5L / h. At this time, 5L of condensate water is still needed to reach the set threshold. Therefore, the start time t = 5 / 14.5 = 0.344h.

[0068] Preferably, the specific steps of the step S2 are as follows:

[0069] Step S21: Input the total water output rate into the water pump simulation model, and output the initial power of the water pump through the water pump simulation model;

[0070] Step S22: Obtain the water level difference between the water level in the condensate tank and the set threshold, and determine whether the water level difference falls within the water level threshold. If the water level difference does not fall within the water level threshold, obtain the ratio between the water level difference and the set threshold as the adjustment ratio, and adjust the initial power with the adjustment ratio, and use the adjusted power as the starting power of the water pump. If the water level difference falls within the water level threshold, use the initial power as the starting power of the water pump.

[0071] In the present invention, a simple water pump simulation model is constructed in the way of digital twin. At this time, the total water output rate is used as the input of the water pump simulation model. By continuously adjusting its power, the pumping efficiency of the water pump is made the same as the total water output rate, or the pumping efficiency is 5% - 10% higher than the total water output rate, so as to avoid the occurrence of condensate overflow. Since the maintenance situation of the indoor unit cannot be known, when the prediction time arrives, there may be an error between the water level and the set threshold. If the actual water level is higher than the set threshold, it means that there may be problems such as air exhaust in the current part of the indoor unit, resulting in more condensate generation. Therefore, after calculating the initial power, the water level difference between the water level in the condensate tank and the set threshold will be obtained. If the water level difference falls within the water level threshold, there is no need to adjust at this time, and the initial power is directly used as the starting power of the water pump. If the water level difference does not fall within the water level threshold, it means that there may be problems with the indoor unit air conditioner at this time. And there is a proportional linear relationship between the power of the water pump and the drainage volume. Therefore, obtaining the ratio (adjustment ratio) between the water level difference and the set threshold is equivalent to obtaining the ratio of the drainage volume that needs to be processed more to the existing drainage volume. After adjusting the initial power accordingly with the adjustment ratio, the water pump drainage can meet the drainage demand of the current condensate water output volume.

[0072] Due to the error in the condensate water volume, at this time, the adjusted water level difference can be obtained by subtracting the initial water level from the water level in the condensate tank, and then dividing the adjusted water level difference by the starting time to obtain the actual total water output rate. Then, the values of α, β, and k2 are re-obtained through the previous historical data and the recursive least squares method. The specific calculation formula is as follows:

[0073] θ(i) = θ(i - 1) + K(i)·[W t (i) - φ T (i)·θ(i - 1)];

[0074] where θ(i) is the parameter to be corrected in the i-th control, such as θ(i) = [k2, α, β] T , W t(i) is the actual total water output rate in the i-th control, and φ is the parameter with observation, such as φ = [P2·cop, P1·cop] T .

[0075] Through continuous control adjustment, the values of α, β, and k2 are continuously corrected, so that the start-up time and start-up power can be determined more accurately, thereby precisely controlling the water pump.

[0076] A multi-connected air-conditioning water pump control system based on condensate water level monitoring, using the multi-connected air-conditioning water pump control system based on condensate water level monitoring, includes a time determination module and a power determination module;

[0077] The time determination module is used to obtain the start-up quantity and start-up temperature of the indoor unit, determine the time when the water level in the condensate water tank reaches the set threshold based on the start-up quantity and start-up temperature, and use this time as the start-up time of the water pump;

[0078] The power determination module is used to detect the water level in the condensate water tank when the start-up time arrives, and adjust the start-up power of the water pump based on the relationship between the water level and the set threshold.

[0079] Preferably, the time determination module includes a first power determination sub-module, a second power determination sub-module, an indoor unit water output rate determination sub-module, and a time calculation sub-module;

[0080] The first power determination sub-module calculates the first target power of the indoor unit based on the start-up temperature of the indoor unit;

[0081] The second power determination sub-module is used to select the corresponding proportion of the second target power according to the current outdoor temperature;

[0082] The indoor unit water output rate determination sub-module is used to calculate the water output rate of the condensate water of a single indoor unit through the first real-time compliance power and the second load power;

[0083] The time calculation sub-module is used to count the water output rates of all indoor units as the total water output rate, and obtain the time when the condensate water reaches the set threshold based on the relationship between the total water output rate and the set threshold.

[0084] Preferably, the power determination module includes an initial power sub-module and an adjustment sub-module;

[0085] The initial power sub-module is used to input the total water output rate into the water pump simulation model, and output the initial power of the water pump through the water pump simulation model;

[0086] The regulator sub-module is used to obtain the water level difference between the water level in the condensate water tank and the set threshold, and determine whether the water level difference falls within the water level threshold. If the water level difference does not fall within the water level threshold, the ratio between the water level difference and the set threshold is obtained as the adjustment ratio, and the initial power is adjusted according to the adjustment ratio, and the adjusted power is used as the starting power of the water pump. If the water level difference falls within the water level threshold, the initial power is used as the starting power of the water pump.

[0087] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0088] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A multi-connected air conditioner water pump control method based on condensate water level monitoring, characterized in that, It includes the following steps: Step S1: Obtain the startup quantity and startup temperature of the indoor unit, determine the time when the water level in the condensate water tank reaches the set threshold based on the startup quantity and startup temperature, and use this time as the startup time of the water pump; Step S2: When the startup time arrives, detect the water level in the condensate water tank, and adjust the startup power of the water pump based on the relationship between the water level and the set threshold.

2. The multi-connected air conditioner water pump control method based on condensate water level monitoring according to claim 1, characterized in that The steps of step S1 are as follows: Step S11: Calculate the first target power of the indoor unit based on the startup temperature of the indoor unit; Step S12: Select the second target power with a corresponding ratio according to the current outdoor temperature; Step S13: Calculate the water discharge rate of the condensate water of a single indoor unit through the first real-time compliance power and the second load power; Step S14: Count the water discharge rates of all indoor units as the total water discharge rate, and obtain the time when the condensate water reaches the set threshold based on the relationship between the total water discharge rate and the set threshold.

3. A multi-connected air conditioner water pump control method based on condensate water level monitoring according to claim 2, characterized in that, The step of calculating the first target power of the indoor unit based on the startup temperature in step S11 includes: obtaining the first temperature difference using the startup temperature and the indoor temperature, and obtaining the first target power based on the first temperature difference, the response duration of the indoor unit, and the maximum power; The formula for obtaining the first target power is as follows: where k1 is the load correction parameter, with a value ranging from 0.8 to 1.2, P max is the maximum power, ΔTi is the first temperature difference of the i-th indoor unit, and τ is the temperature response time constant, with a value ranging from 2 to 5.

4. A multi-connected air conditioner water pump control method based on condensate water level monitoring according to claim 2, characterized in that, In step S12, the second target power is the product of the corresponding relationship and the average value of the first target power; Where the corresponding relationship is proportional to the outdoor temperature.

5. A multi-connected air conditioner water pump control method based on condensate water level monitoring according to claim 2, characterized in that, The formula for obtaining the water discharge rate of the condensate water of a single indoor unit in the step S13 is as follows: W i = k2(P 1i *α + P2*β)*cop; where k2 is the condensate generation coefficient, and α and β are the proportionality coefficients respectively, and P 1i is the first target power of the i-th indoor unit, P2 is the second target power, and cop is the energy efficiency ratio of the air conditioner.

6. A multi-connected air conditioner water pump control method based on condensate water level monitoring according to claim 2, characterized in that, The specific steps of step S2 are as follows: Step S21: Input the total water discharge rate into the water pump simulation model, and output the initial power of the water pump through the water pump simulation model; Step S22: Obtain the water level difference between the water level in the condensate water tank and the set threshold, and determine whether the water level difference falls within the water level threshold. If the water level difference does not fall within the water level threshold, obtain the ratio between the water level difference and the set threshold as the adjustment ratio, and adjust the initial power with the adjustment ratio, and use the adjusted power as the startup power of the water pump. If the water level difference falls within the water level threshold, use the initial power as the startup power of the water pump.

7. A multi-connected air conditioner water pump control system based on condensate water level monitoring, characterized in that, Using the multi-connected air-conditioning water pump control system based on condensate water level monitoring according to any one of claims 1 to 6, including a time determination module and a power determination module; The time determination module is used to obtain the startup quantity and startup temperature of the indoor unit, determine the time when the water level in the condensate water tank reaches the set threshold based on the startup quantity and startup temperature, and use this time as the startup time of the water pump; The power determination module is used to detect the water level in the condensate water tank when the startup time arrives, and adjust the startup power of the water pump based on the relationship between the water level and the set threshold.

8. A multi-connected air conditioner water pump control system based on condensate water level monitoring according to claim 7, characterized in that, The time determination module includes a first power determination sub-module, a second power determination sub-module, an indoor unit water discharge rate determination sub-module, and a time calculation sub-module; The first power determination sub-module calculates the first target power of the indoor unit based on the startup temperature of the indoor unit; The second power determination sub-module is used to select the second target power with a corresponding ratio according to the current outdoor temperature; The indoor unit water discharge rate determination sub-module is used to calculate the water discharge rate of the condensate water of a single indoor unit through the first real-time compliance power and the second load power; The time calculation sub-module is used to count the water outlet rate of all indoor units as the total water outlet rate, and based on the relationship between the total water outlet rate and the set threshold, obtain the time when the condensate water reaches the set threshold.

9. The multi-connected air conditioner water pump control system based on condensate water level monitoring according to claim 7, characterized in that The power determination module includes an initial power sub-module and an adjustment sub-module; The initial power sub-module is used to input the total water outlet rate into the water pump simulation model, and output the initial power of the water pump through the water pump simulation model; The adjustment sub-module is used to obtain the water level difference between the water level in the condensate water tank and the set threshold, determine whether the water level difference falls within the water level threshold. If the water level difference does not fall within the water level threshold, obtain the ratio between the water level difference and the set threshold as the adjustment ratio, and adjust the initial power with the adjustment ratio, and use the adjusted power as the starting power of the water pump. If the water level difference falls within the water level threshold, use the initial power as the starting power of the water pump.

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