Water multi-connected air conditioning system and anti-condensation control method and device thereof

Abstract

The application discloses a water multi-connected air conditioning system and a condensation control method and device thereof. The method comprises the following steps: acquiring the total cooling capacity of all indoor units in a system in a refrigeration operation; determining whether to start an indoor unit air outlet condensation prevention mode according to the total cooling capacity; after starting, acquiring the inlet and outlet water temperatures of the indoor unit in the refrigeration operation, and determining whether there is a condensation risk at the indoor unit air outlet; if there is a risk, determining a target indoor unit among the indoor units that are not started, and starting the air conditioning water valve corresponding to the target indoor unit. The application detects the water flow change of the indoor unit in operation, determines whether there is a condensation risk at the indoor unit air outlet, and eliminates the risk by adjusting the air conditioning water valve of each indoor unit in the system, so that the outdoor unit compressor does not need to frequently operate, the indoor unit fan speed does not need to be frequently adjusted, the continuous and stable operation of the moving parts is ensured, and the reliability of the product is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and in particular, relates to a water multi-connected air conditioning system and a condensation control method and device thereof. BACKGROUND

[0002] The water multi-connected air conditioning system mainly comprises an outdoor unit and multiple indoor units. In the refrigeration mode, the outdoor unit takes chilled water and then sends the chilled water to each indoor unit under the driving of a water pump, and then the indoor unit exchanges heat with indoor air, thereby achieving the purpose of reducing indoor temperature.

[0003] When the capacity of the indoor unit and the outdoor unit of the water multi-connected air conditioning system is matched, in order to achieve better economy, the capacity of the indoor unit and the outdoor unit is usually selected to be between 20% and 200%. In this case, only a few indoor units are turned on or multiple indoor units are turned off. Due to the large capacity of the outdoor unit or the delay of water flow and water temperature adjustment, the water flow of the running indoor unit is prone to be large, thereby causing the outlet air temperature of the indoor unit to be low and the outlet of the indoor unit to have a risk of condensation.

[0004] In view of the problem that the water flow in the water multi-connected air conditioning system is increased, thereby causing the outlet of the indoor unit to have a risk of condensation, an effective solution has not been proposed in the prior art. SUMMARY

[0005] The water multi-connected air conditioning system and the condensation control method and device thereof provided in the embodiments of the present application solve the problem that the water flow in the water multi-connected air conditioning system is increased, thereby causing the outlet of the indoor unit to have a risk of condensation.

[0006] To solve the above technical problem, the present application provides a condensation control method for a water multi-connected air conditioning system, wherein the method comprises: obtaining the total cooling capacity of all indoor units in the system that are in refrigeration operation and have open air conditioning water valves; determining whether to start an indoor unit outlet condensation prevention mode according to the total cooling capacity; after determining to start the indoor unit outlet condensation prevention mode, obtaining the inlet water temperature and outlet water temperature of chilled water of each indoor unit in refrigeration operation; determining whether there is a risk of condensation at the outlet of the indoor unit according to the inlet water temperature and the outlet water temperature; if there is a risk of condensation at the outlet of the indoor unit, determining a target indoor unit among the indoor units that are not started, and starting the air conditioning water valve corresponding to the target indoor unit to eliminate the risk of condensation at the outlet of the indoor unit; wherein the system comprises one outdoor unit and multiple indoor units, and an air conditioning water valve is arranged in the return water pipeline of each indoor unit.

[0007] Further, the total cooling capacity of all indoor units in the system in the refrigeration operation and with the air conditioning water valve open is obtained, including: obtaining the air damper of all indoor units in the refrigeration operation and with the air conditioning water valve open; determining the corresponding cooling capacity according to the air damper of each indoor unit, and calculating the total cooling capacity of all indoor units in the refrigeration operation and with the air conditioning water valve open.

[0008] Further, whether to start the indoor unit air outlet anti-condensation mode is determined according to the total cooling capacity, including: determining whether the total cooling capacity is less than a preset proportion of the rated refrigeration capacity of the outdoor unit; if yes, it is determined to start the indoor unit air outlet anti-condensation mode; if no, it is determined not to start or exit the indoor unit air outlet anti-condensation mode.

[0009] Further, whether there is a risk of indoor unit air outlet condensation is determined according to the water inlet temperature and the water outlet temperature, including: determining whether the water flow of the indoor unit exceeds the normal water flow state according to the size relationship between the water inlet temperature and the preset water inlet temperature, and the size relationship between the water outlet temperature and the preset water outlet temperature; if no, it is determined that there is no risk of indoor unit air outlet condensation; if yes, the water outlet temperature is re-detected after a preset time interval, and whether there is a risk of indoor unit air outlet condensation is determined according to the size relationship between the re-detected water outlet temperature and the preset water outlet temperature.

[0010] Further, whether the water flow of the indoor unit exceeds the normal water flow state is determined according to the size relationship between the water inlet temperature and the preset water inlet temperature, and the size relationship between the water outlet temperature and the preset water outlet temperature, including:

[0011] After the indoor unit in the refrigeration operation keeps the same air damper for a preset time, the water inlet temperature and the water outlet temperature of the indoor unit are collected, and the water inlet temperature average value T 1n and the water outlet temperature average value T 2n of all indoor units in the refrigeration operation are calculated.

[0012] If the water inlet temperature average value T 1n =T1, and the water outlet temperature average value T 2n ≤T2-ΔT, it is determined that the water flow of the indoor unit exceeds the normal water flow state.

[0013] Wherein, T1 is the preset water inlet temperature, T2 is the preset water outlet temperature, and ΔT is the preset fluctuation allowance.

[0014] Further, the water outlet temperature is re-detected after a preset time interval, and whether there is a risk of indoor unit air outlet condensation is determined according to the size relationship between the re-detected water outlet temperature and the preset water outlet temperature, including:

[0015] The water outlet temperature is re-detected after a preset time interval, and an average value T of the water outlet temperatures of all indoor units in cooling operation is obtained 2n ;

[0016] If the average value T of the water outlet temperatures is less than or equal to T2-ΔT, it is determined that there is a risk of condensation at the air outlet of the indoor unit. 2n

[0017] If the average value T of the water outlet temperatures is greater than T2-ΔT, it is determined that there is no risk of condensation at the air outlet of the indoor unit. 2n

[0018] Wherein, T2 is a preset water outlet temperature, and ΔT is a preset fluctuation margin.

[0019] Further, the target indoor unit is determined among the indoor units that are not started, and after the air conditioning water valve corresponding to the target indoor unit is started, the method further comprises:

[0020] Further, the target indoor unit is determined among the indoor units that are not started, and after the air conditioning water valve corresponding to the target indoor unit is started, the method further comprises:

[0021] After a preset time interval, the average value T of the water outlet temperatures of all indoor units in cooling operation is re-detected 2n ;

[0022] If the average value T of the water outlet temperatures is greater than or equal to T2+ΔT, the air conditioning water valve corresponding to the target indoor unit is closed. 2n

[0023] If the average value T of the water outlet temperatures is less than T2-ΔT and greater than T2+ΔT, the current running state of the system is maintained. 2n

[0024] If the average value T of the water outlet temperatures is less than or equal to T2-ΔT, a second target indoor unit is determined among the indoor units that are not started, and the air conditioning water valve corresponding to the second target indoor unit is started. 2n

[0025] Wherein, T2 is a preset water outlet temperature, and ΔT is a preset fluctuation margin.

[0026] Further, after the second target indoor unit is determined among the indoor units that are not started and the air conditioning water valve corresponding to the second target indoor unit is started, the method further comprises:

[0027] After a preset time interval, the average value T of the water outlet temperatures of all indoor units in cooling operation is re-detected​​​​​2n ;

[0028] If the average outlet water temperature T 2n If the value is ≥T2+ΔT, then the air conditioning water valve corresponding to the second target indoor unit is closed;

[0029] If the average outlet water temperature T2-ΔT<T 2n If <T2+ΔT, then the current operating state of the system is maintained;

[0030] If the average outlet water temperature T 2n If the value is ≤T2-ΔT, an alarm message indicating a risk of condensation at the indoor unit's air outlet will be sent.

[0031] This invention also provides an anti-condensation control device for a multi-split air conditioning system, wherein the device includes: a first judgment module, used to acquire the total cooling capacity of all indoor units in the system that are in cooling operation and whose air conditioning water valves are open; and to determine whether to activate the anti-condensation mode at the air outlet of the indoor unit based on the total cooling capacity; a second judgment module, used to acquire the inlet and outlet water temperatures of the chilled water of each indoor unit in cooling operation after determining to activate the anti-condensation mode at the air outlet of the indoor unit; and to determine whether there is a risk of condensation at the air outlet of the indoor unit based on the inlet and outlet water temperatures; and a processing module, used to identify a target indoor unit among the unactivated indoor units when there is a risk of condensation at the air outlet of the indoor unit, and to activate the air conditioning water valve corresponding to the target indoor unit to eliminate the risk of condensation at the air outlet of the indoor unit; wherein the system includes one outdoor unit and multiple indoor units, and an air conditioning water valve is installed on the return water pipe of each indoor unit.

[0032] The present invention also provides a water-based multi-split air conditioning system, wherein the water-based multi-split air conditioning system includes the above-mentioned anti-condensation control device for water-based multi-split air conditioning systems.

[0033] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the method as described above.

[0034] By applying the technical solution of this invention, using commonly used detection elements in water-cooled multi-split air conditioning systems, changes in water flow in the operating indoor unit can be detected without the need for additional detection elements, and the risk of condensation at the air outlet of the operating indoor unit can be determined. Furthermore, eliminating the risk of condensation at the indoor unit's air outlet can be achieved solely through the air conditioning water valves of each indoor unit within the integrated control system, eliminating the need for frequent operation of the outdoor unit compressor or frequent adjustments to the indoor unit fan speed. This ensures continuous and stable operation of moving parts, improves product reliability, and avoids discomfort caused by frequent changes in indoor unit airflow speed due to frequent adjustments in indoor unit fan speed. Attached Figure Description

[0035] Figure 1 is a structural schematic diagram of a water multi-connected air conditioning system according to an embodiment of the present application;

[0036] Figure 2 is a flow chart of a condensation control method of a water multi-connected air conditioning system according to an embodiment of the present application;

[0037] Figure 3 is a detailed flow chart of a condensation control method of a water multi-connected air conditioning system according to an embodiment of the present application;

[0038] Figure 4 is a condensation control logic schematic diagram of a water multi-connected air conditioning system according to an embodiment of the present application;

[0039] Figure 5 is a structural block diagram of a condensation control device of a water multi-connected air conditioning system according to an embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to make the objects, technical solutions and advantages of the present application clearer, the following will further describe the present application in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0041] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "an" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Plural" generally includes at least two.

[0042] It should be understood that the term "and / or" used herein only describes an association relationship of associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0043] Depending on the context, the word "if" as used herein can be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if it is determined" or "if (a stated condition or event) is detected" can be interpreted as "when it is determined" or "in response to determining" or "when (a stated condition or event) is detected" or "in response to detecting (a stated condition or event)".

[0044] It is also important to note that the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process or method. An element proceeded by "comprises a" does not, without more constraints, exclude the presence of additional identical elements in the process or method comprising the recited element.

[0045] Optional embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0046] Embodiment 1

[0047] The water multi-connected air conditioning system mainly consists of an outdoor unit, multiple indoor units, floor heating coil pipes, a water pump, a water distribution device, air conditioning water valves, and floor heating water valves. Figure 1 is a structural schematic diagram of a water multi-connected air conditioning system according to an embodiment of the present application, as shown in Figure 1 An air conditioning water valve is installed on the water outlet pipe of each indoor unit, which can be an electric two-way valve and can control the on-off of chilled water entering the indoor unit. The return air inlet of the indoor unit or the indoor unit controller is provided with a temperature sensor for collecting the ambient temperature of the indoor unit. The water inlet and outlet pipes (water supply and return pipes) of the indoor unit are provided with temperature sensors for collecting the inlet and outlet water temperatures of the chilled water.

[0048] According to an embodiment of the present application, an embodiment of a condensation control method for a water multi-connected air conditioning system is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in a different order.

[0049] Figure 2 is a flowchart of a condensation control method for a water multi-connected air conditioning system according to an embodiment of the present application, which includes an outdoor unit and multiple indoor units, and an air conditioning water valve is provided in the return water pipeline of each indoor unit. As shown in Figure 2 The method comprises the following steps:

[0050] Step S201: Obtain the total cooling capacity of all indoor units in the system that are in refrigeration operation and whose air conditioning water valves are open; determine whether to start the indoor unit air outlet condensation prevention mode according to the total cooling capacity;

[0051] Step S202: After determining to start the indoor unit air outlet condensation prevention mode, obtain the inlet and outlet water temperatures of the chilled water of each indoor unit in refrigeration operation; determine whether there is a risk of indoor unit air outlet condensation according to the inlet and outlet water temperatures;

[0052] Step S203, if there is a risk of indoor unit air outlet condensation, determine the target indoor unit in the unstarted indoor units, start the air conditioning water valve corresponding to the target indoor unit to eliminate the risk of indoor unit air outlet condensation.

[0053] The embodiment proposes a control scheme for preventing condensation at the air outlet of an indoor unit of a water multi-connected air conditioning system. In a refrigeration mode, whether to start the indoor unit air outlet condensation prevention mode is determined according to the proportion of the preset total cooling capacity at the operating indoor unit speed to the rated refrigeration capacity of the outdoor unit. After starting, the water flow change of the operating indoor unit is detected to determine whether there is a risk of condensation at the air outlet of the operating indoor unit. By jointly adjusting the air conditioning water valves of the unstarted indoor units in the system, the risk of condensation at the air outlet of the operating indoor unit is eliminated. The problem of condensation risk at the air outlet of the indoor unit due to the large capacity of the outdoor unit when only one or a small number of indoor units are running in the water multi-connected air conditioning system is solved. The problem of condensation risk at the air outlet of the indoor unit due to the increase of water flow in the water multi-connected air conditioning system is solved.

[0054] The following will be described in combination with Figure 3 The detailed process of the condensation prevention control method of the water multi-connected air conditioning system will be introduced as shown in Figure 3 The process includes the following steps:

[0055] Step S301, obtain the total cooling capacity of all indoor units in the system that are in refrigeration operation and have the air conditioning water valve opened.

[0056] In an embodiment, the wind speed of all indoor units in refrigeration operation and with the air conditioning water valve opened is obtained; the cooling capacity corresponding to each indoor unit is determined according to the wind speed of each indoor unit, and the total cooling capacity of all indoor units in refrigeration operation and with the air conditioning water valve opened is calculated.

[0057] It should be noted that under standard working conditions, the cooling capacity (refrigeration capacity) corresponding to each wind speed of each model of indoor unit is fixed, so the corresponding cooling capacity of each wind speed can be pre-set in the unit controller, and the relevant data can be directly called when needed. Under non-standard working conditions (for example, changes in inlet and outlet water temperature), the cooling capacity of the indoor unit under the standard working condition can be proportionally corrected according to the change of the inlet and outlet water temperature, and the cooling capacity of the indoor unit under the working condition can be obtained.

[0058] Step S302, determine whether to start the indoor unit air outlet condensation prevention mode according to the total cooling capacity; if yes, execute step S303, and if no, return to step S301.

[0059] In one embodiment, it is determined whether the total cooling capacity is less than a preset proportion of the rated cooling capacity of the outdoor unit; if yes, it is determined to start the indoor unit air outlet anti-condensation mode; if no, it is determined not to start or exit the indoor unit air outlet anti-condensation mode.

[0060] For example, assuming that the total cooling capacity of the indoor unit is less than 50% of the rated cooling capacity of the outdoor unit, the indoor unit air outlet anti-condensation mode is started; assuming that the total cooling capacity of the indoor unit is greater than or equal to 50% of the rated cooling capacity of the outdoor unit, the indoor unit air outlet anti-condensation mode is not entered or exited.

[0061] When the total cooling capacity (total cooling demand) of the indoor unit is less than the rated cooling capacity of the outdoor unit, the outdoor unit and the water pump are in a medium or low frequency operation state. When the total cooling demand of the indoor unit is very small, there is a minimum operating frequency and speed limit for the outdoor unit and the water pump, and when the outdoor unit has been operated according to the minimum capacity, the rated cooling capacity of the outdoor unit may still be greater than the cooling capacity required by the indoor unit at this time (in a multi-split system, the outdoor unit needs to meet the capacity requirement of all indoor units being turned on or part of the indoor units being turned on, and in the extreme case, only one smallest indoor unit is turned on, the capacity of the outdoor unit is much greater than the capacity required by a single indoor unit), at this time, the air outlet of the indoor unit will appear condensation, and the total cooling capacity of the indoor unit being operated is generally below 30% of the rated capacity of the outdoor unit, at this time, the risk of condensation at the air outlet of the indoor unit is relatively large. Therefore, the above-mentioned preset proportion can be set to 30% to 100%, and preferably can be set to 50%, in order to reserve some margin and enter the indoor unit air outlet anti-condensation mode in advance.

[0062] Step S303, after determining to start the indoor unit air outlet anti-condensation mode, the inlet water temperature and outlet water temperature of the refrigerated water of each indoor unit in refrigeration operation are obtained.

[0063] Step S304, it is determined whether there is a risk of condensation at the air outlet of the indoor unit according to the inlet water temperature and the outlet water temperature; if yes, step S305 is performed, and if no, step S303 is returned to be executed.

[0064] In one embodiment, according to the size relationship between the inlet water temperature and the preset inlet water temperature, and the size relationship between the outlet water temperature and the preset outlet water temperature, it is determined whether the water flow of the indoor unit exceeds the normal water flow state; if no, it is determined that there is no risk of condensation at the air outlet of the indoor unit; if yes, the outlet water temperature is re-detected after a preset time interval, and according to the size relationship between the re-detected outlet water temperature and the preset outlet water temperature, it is determined whether there is a risk of condensation at the air outlet of the indoor unit.

[0065] The embodiment needs to determine whether the water flow of the indoor unit is too large, considering that sometimes the water flow is too large due to system water flow fluctuation, and the air outlet of the indoor unit does not have a condensation risk, so further confirmation is needed to avoid misjudgment and misoperation.

[0066] Specifically, according to the size relationship between the inlet water temperature and the preset inlet water temperature, and the size relationship between the outlet water temperature and the preset outlet water temperature, it is determined whether the water flow of the indoor unit exceeds the normal water flow state, including: after the indoor unit in the cooling operation keeps the same air outlet continuously for a preset time, the inlet water temperature and the outlet water temperature of the indoor unit are collected, and so on, to obtain the average value T 1n of the inlet water temperature of all indoor units in the cooling operation and the average value T 2n of the outlet water temperature; if the average value T 1n of the inlet water temperature is T1, and the average value T 2n of the outlet water temperature is less than or equal to T2-ΔT, it is determined that the water flow of the indoor unit exceeds the normal water flow state; wherein T1 is the preset inlet water temperature, T2 is the preset outlet water temperature, and ΔT is the preset fluctuation allowance.

[0067] Specifically, the outlet water temperature is re-detected after a preset time interval, and according to the size relationship between the re-detected outlet water temperature and the preset outlet water temperature, it is determined whether there is a condensation risk at the air outlet of the indoor unit, including: the outlet water temperature is re-detected after a preset time interval, and the average value T 2n of the outlet water temperature of all indoor units in the cooling operation is obtained; if the average value T 2n of the outlet water temperature is less than or equal to T2-ΔT, it indicates that the water flow of the indoor unit is too large at the current air outlet, and the air outlet of the indoor unit being operated has a condensation risk, so it is determined that there is a condensation risk at the air outlet of the indoor unit. If the average value T 2n of the outlet water temperature is greater than T2-ΔT, it indicates that the previous water flow being too large is caused by system water flow fluctuation, and the air outlet of the indoor unit has no condensation risk, so it is determined that there is no condensation risk at the air outlet of the indoor unit. Wherein T2 is the preset outlet water temperature, and ΔT is the preset fluctuation allowance. Based on this, it can accurately identify whether the water flow of the indoor unit is too large, and further accurately identify whether it is a real condensation risk, to avoid misjudgment and subsequent misoperation caused by system water flow fluctuation.

[0068] Step S305, if there is a condensation risk at the air outlet of the indoor unit, a target indoor unit is determined from the indoor units that have not been started, and a water valve corresponding to the target indoor unit is started to eliminate the condensation risk at the air outlet of the indoor unit; if there is no condensation risk at the air outlet of the indoor unit, it returns to step S303.

[0069] In one implementation, the ambient temperature of each indoor unit that is not started is obtained, and the set temperature of each indoor unit that is in cooling operation is obtained; the ambient temperature is compared with the set temperature, and the indoor unit that is not started and the indoor unit in cooling operation with the largest temperature difference are determined according to the size of the temperature difference, and the indoor unit that is not started is determined as the target indoor unit.

[0070] It should be noted that this embodiment selects the indoor unit with the largest temperature difference that is not currently running. This is because the air outlet of the currently running indoor unit is already at risk of condensation, and the unstarted indoor unit needs to share the excess cooling capacity of the system. Since the unstarted indoor unit only opens the water valve and does not start the fan, it is a form of radiative heat exchange. Therefore, the larger the temperature difference, the stronger the heat exchange capacity of the unstarted indoor unit, and the better it is for alleviating system flow and raising water temperature.

[0071] Step S306: After a preset time interval, re-detect the average outlet water temperature T of all indoor units in cooling operation. 2n Based on the average outlet water temperature T 2n Implement appropriate anti-condensation strategies; specifically:

[0072] If the average outlet water temperature T 2n If the water flow rate is ≥T2+ΔT, it indicates that the water flow rate of the indoor unit is too low, so the air conditioning water valve corresponding to the target indoor unit should be closed.

[0073] If the average outlet water temperature T2-ΔT<T 2n If <T2+ΔT, then the current operating state of the system is maintained;

[0074] If the average outlet water temperature T 2n If the water flow rate is ≤T2-ΔT, it indicates that the water flow rate of the currently running indoor unit is too high, requiring further anti-condensation measures. Therefore, a second target indoor unit is identified among the non-started units, and the corresponding air conditioning water valve is activated. After this, a further anti-condensation strategy is implemented: after a preset interval, the average outlet water temperature T of all indoor units in cooling mode is re-detected. 2n If the average outlet water temperature T 2n If the water flow rate of the operating indoor unit is ≥T2+ΔT, it indicates that the water flow rate is too low, so the air conditioning water valve corresponding to the second target indoor unit should be closed; if the average outlet water temperature T2-ΔT<T 2n If the average outlet water temperature is less than T2 + ΔT, then the current operating state of the system will be maintained; if the average outlet water temperature is T... 2n If the value is ≤T2-ΔT, it indicates that the water flow rate of the indoor unit is too high, and an alarm message indicating the risk of condensation at the air outlet of the indoor unit will be sent.

[0075] It should be noted that the subsequent gap can also be solved by starting and stopping the outdoor unit or reminding the user to raise the damper or automatically raising the indoor unit damper, etc.

[0076] The embodiment adopts the temperature detection element commonly used in the water multi-connected air conditioning system, without the need to increase additional detection elements, so as to detect the water flow change of the indoor unit being operated and determine whether the indoor unit outlet being operated will exist the condensation risk. Meanwhile, when the condensation risk of the indoor unit outlet is eliminated, the air conditioning water valve of each indoor unit in the system can be used to solve the problem, without the need to frequently operate the outdoor unit compressor or frequently adjust the indoor unit fan speed, so as to ensure the continuous and stable operation of the moving parts, improve the reliability of the product, and avoid the human discomfort caused by the frequent change of the indoor unit outlet air speed due to the frequent adjustment of the indoor unit fan speed.

[0077] Embodiment 2

[0078] Figure 4 is a schematic diagram of the anti-condensation control logic of the water multi-connected air conditioning system according to the embodiment of the present application. The anti-condensation control logic of the embodiment includes:

[0079] 1) Determine the proportion of the total capacity of the indoor unit being operated to the rated capacity of the outdoor unit.

[0080] In the cooling mode, calculate the proportion of the preset total cooling capacity at the operating position (damper) of the indoor unit to the rated cooling capacity of the outdoor unit, and determine whether to start the indoor unit outlet anti-condensation mode.

[0081] Specifically, when the indoor unit is in the cooling mode, the water valve opening state and the damper position of the indoor unit being operated in the water multi-connected air conditioning system are detected, and the total cooling capacity of all indoor units being operated in the cooling mode and having the air conditioning water valve opened is calculated according to the preset cooling capacity of each damper of each indoor unit.

[0082] If the total cooling capacity of the indoor unit is less than 50% of the rated cooling capacity of the outdoor unit, the indoor unit outlet anti-condensation mode is started; if the total cooling capacity of the indoor unit is greater than or equal to 50% of the rated cooling capacity of the outdoor unit, the indoor unit outlet anti-condensation mode is not entered or exited.

[0083] 2) Start the indoor unit outlet anti-condensation mode.

[0084] After starting the indoor unit outlet anti-condensation mode, the inlet and outlet water temperatures of the indoor unit being operated are detected, the difference between the actual outlet water temperature and the preset outlet water temperature is calculated, and the change of the water flow of the indoor unit and whether the indoor unit outlet exists the condensation risk are determined.

[0085] Specifically, after entering the indoor unit air outlet anti-condensation mode, when a certain indoor unit air outlet is continuously and stably operated for 30s (the timing is restarted after switching the air outlet), the chilled water inlet and outlet temperatures of the indoor unit are collected for 3s, and the average chilled water inlet temperature T 11 and the average chilled water outlet temperature T 21 are calculated in this period of time. 11 Similarly, the average chilled water inlet temperature T 12 , T 13 ...T 1n and the average chilled water outlet temperature T 21 , T 22 , T 23 ...T 2n are recorded. The preset chilled water inlet temperature of the unit is T1, the preset chilled water outlet temperature is T2, and the preset fluctuation margin is ΔT, which is 0.2°C by default and can be selected within 0-0.5°C.

[0086] If at a certain moment, the average chilled water inlet temperature T 1n =T1, and the average chilled water outlet temperature T 2n ≤T2-ΔT, it indicates that the water flow of the indoor unit at the current air outlet is too large, and the running indoor unit air outlet has a condensation risk, and the duration t is recorded from this moment. When t=30s, if the average chilled water outlet temperature T 2n ≤T2-ΔT, it indicates that the outdoor unit capacity is too large, and the running indoor unit flow will continue to be too large, and the indoor unit air outlet has a condensation risk; if the average chilled water outlet temperature T 2n >T2-ΔT, it indicates that the previous water flow is too large due to system water flow fluctuation, and the indoor unit air outlet has no condensation risk.

[0087] 3) Indoor unit water flow detection and abnormality judgment.

[0088] If it is determined that the indoor unit air outlet has a condensation risk, the ambient temperature of the indoor unit that is not started in the system is compared with the set temperature of the running indoor unit to determine the indoor units A and B with the largest temperature difference, and the water valve of the indoor unit A is started to adjust the system flow. Of course, the indoor unit A with the largest temperature difference can be determined first, and the corresponding anti-condensation strategy is executed. If the effect is not good, the indoor unit B with the largest temperature difference is further determined, and the corresponding anti-condensation strategy is executed.

[0089] Specifically, when the running indoor unit air outlet has a condensation risk, the ambient temperatures T h1 , T h2 , T h3 ...T hn of each indoor unit that is not started in the water multiple system are detected, which are compared with the set temperature T c1 , T c2T c3 By comparing the two sample units A and B with the largest temperature difference, the air conditioning water valve of indoor unit A is opened to share the system flow.

[0090] 4) Handling the risk of condensation at the indoor unit's air outlet.

[0091] Based on the changes in water flow of the operating indoor unit, adjust the opening and closing status of the air conditioning water valves of indoor units A and B, and assess whether to trigger an alarm for condensation risk at the indoor unit's air outlet.

[0092] Specifically, after opening the air conditioning water valve of indoor unit A to share the system flow, the average water outlet temperature T of the running indoor unit is monitored in real time at 30-second intervals. 2n If T 2n If the water flow rate is ≥T2+ΔT, it indicates that the water flow rate of the indoor unit is too low. In this case, close the air conditioning water valve of indoor unit A. If T2-ΔT<T 2n If T < T2 + ΔT, then the water-cooled multi-split air conditioning system will operate as it is currently; if T 2n If the flow rate is ≤T2-ΔT, it indicates that the flow rate of the indoor unit is still too high. At this time, the air conditioning water valve of indoor unit B should be turned on.

[0093] After a 30-second interval, the average water temperature T of the running indoor unit is monitored in real time. 2n ≤T2-ΔT. If T 2n If the water flow rate is less than or equal to T2-ΔT, it indicates that the water flow rate of the indoor unit is too low. In this case, the air conditioning water valve of indoor unit B should be closed. If T2-ΔT < T 2n If T < T2 + ΔT, then the water-cooled multi-split air conditioning system will operate as it is currently; if T 2n If the system water flow rate is ≤T2-ΔT, an alarm will be triggered indicating a risk of condensation at the indoor unit's air outlet.

[0094] The condensation problem at the indoor unit's air outlet can be resolved by intermittently starting and stopping the outdoor unit, reminding users to increase the fan speed, or automatically increasing the indoor unit's fan speed.

[0095] Example 3

[0096] Corresponding to Figure 2 The present invention introduces a method for preventing condensation control in a water-based multi-split air conditioning system. This embodiment provides a device for preventing condensation control in a water-based multi-split air conditioning system, such as... Figure 5 The diagram shown depicts the structural block diagram of an anti-condensation control device for a multi-split water air conditioning system. The device includes:

[0097] The first judgment module 10 is used to obtain the total cooling capacity of all indoor units in the system that are in cooling operation and whose air conditioning water valves are open; and to determine whether to activate the anti-condensation mode of the indoor unit's air outlet based on the total cooling capacity.

[0098] The second determining module 20 is connected to the first determining module 10, and is configured to, after determining to start the indoor unit air outlet anti-condensation mode, acquire the inlet water temperature and the outlet water temperature of the refrigerated water of each indoor unit in a refrigeration operation; and determine whether there is a risk of indoor unit air outlet condensation according to the inlet water temperature and the outlet water temperature.

[0099] The processing module 30 is connected to the second determining module 20, and is configured to, when there is a risk of indoor unit air outlet condensation, determine a target indoor unit in the indoor units that have not been started, and start the air conditioning water valve corresponding to the target indoor unit, so as to eliminate the risk of indoor unit air outlet condensation.

[0100] In the system, one outdoor unit and a plurality of indoor units are included, and the air conditioning water valve is arranged in the return water pipeline of each indoor unit one by one.

[0101] The embodiment also provides a water multi-connected air conditioning system, which comprises the anti-condensation control device of the water multi-connected air conditioning system.

[0102] Embodiment 4

[0103] The embodiment provides an electronic device for an anti-condensation control method of a water multi-connected air conditioning system, the electronic device comprising: at least one processor; and a memory in communication connection with the at least one processor; wherein

[0104] The memory stores instructions executable by the one processor, and the instructions are executed by the at least one processor to enable the at least one processor to: acquire the total cooling capacity of all indoor units in the system that are in a refrigeration operation and have an open air conditioning water valve; determine whether to start an indoor unit air outlet anti-condensation mode according to the total cooling capacity; after determining to start the indoor unit air outlet anti-condensation mode, acquire the inlet water temperature and the outlet water temperature of the refrigerated water of each indoor unit in a refrigeration operation; determine whether there is a risk of indoor unit air outlet condensation according to the inlet water temperature and the outlet water temperature; and if there is a risk of indoor unit air outlet condensation, determine a target indoor unit in the indoor units that have not been started, and start the air conditioning water valve corresponding to the target indoor unit, so as to eliminate the risk of indoor unit air outlet condensation.

[0105] Embodiment 5

[0106] The embodiment of the present application provides a software for executing the technical solutions described in the above embodiments and preferred embodiments.

[0107] The embodiment of the present application provides a non-volatile computer storage medium, the computer storage medium stores computer executable instructions, and the computer executable instructions can execute the anti-condensation control method of the water multi-connected air conditioning system in any method embodiment.

[0108] The storage medium described above stores the software described above, and the storage medium includes but is not limited to an optical disc, a floppy disk, a hard disk, an erasable memory and the like.

[0109] The serial numbers of the embodiments of the present application described above are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0110] In the above embodiments of the present application, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0111] In several embodiments provided in the present application, it should be understood that the disclosed technical contents can be implemented by other manners. Among them, the device embodiments described above are only schematic, for example, the division of the units can be a logical function division, and another division manner can be used in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or modules shown or discussed can be indirect coupling or communication connection through some interfaces, units or modules, and can be electrical or other forms.

[0112] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0113] In addition, each functional unit in each embodiment of the present application can be integrated in a processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0114] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0115] The above product can execute the method provided by the embodiments of the present application, and has the corresponding function modules and beneficial effects of the execution method. Technical details not described in detail in the present embodiment can be referred to the method provided by the embodiments of the present application.

[0116] The electronic device of the embodiments of the present application exists in various forms, including but not limited to:

[0117] (1) Mobile communication device: This kind of device is characterized by having mobile communication function, and providing voice and data communication as the main target. This kind of terminal includes: smart phone (such as iPhone), multimedia phone, functional phone, and low-end phone, etc.

[0118] (2) Ultra-mobile personal computer device: This kind of device belongs to the category of personal computer, has computing and processing function, and generally also has the characteristics of mobile Internet. This kind of terminal includes: PDA, MID and UMPC device, such as iPad.

[0119] (3) Portable entertainment device: This kind of device can display and play multimedia content. This kind of device includes: audio and video player (such as iPod), palm game machine, electronic book, and smart toy and portable vehicle navigation device.

[0120] (4) Server: A device providing computing services, the server is composed of processor, hard disk, memory, device bus, etc. The server is similar to the general computer architecture, but due to the need to provide high-reliability services, the requirements for processing capacity, stability, reliability, security, scalability and manageability are higher.

[0121] (5) Other electronic devices with data interaction function, such as TV, vehicle-mounted large screen, etc.

[0122] The device embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purposes of the embodiments.

[0123] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for anti-condensation control of a water multi-connected air conditioning system, characterized by, The method comprises: acquiring total cooling capacity of all indoor units in the system in refrigeration operation and with air conditioning water valves opened; determining whether to start an indoor unit air outlet anti-condensation mode according to the total cooling capacity; after determining to start the indoor unit air outlet anti-condensation mode, acquiring inlet water temperature and outlet water temperature of chilled water of each indoor unit in refrigeration operation; determining whether there is an indoor unit air outlet condensation risk according to the inlet water temperature and the outlet water temperature, which comprises: determining whether the indoor unit water flow exceeds the normal water flow state according to the size relationship between the inlet water temperature and a preset inlet water temperature and the size relationship between the outlet water temperature and a preset outlet water temperature; if not, it is determined that there is no indoor unit air outlet condensation risk; if yes, the outlet water temperature is re-detected after a preset time interval, and it is determined whether there is an indoor unit air outlet condensation risk according to the size relationship between the re-detected outlet water temperature and the preset outlet water temperature; if there is an indoor unit air outlet condensation risk, a target indoor unit is determined among the indoor units not started, and the air conditioning water valve corresponding to the target indoor unit is started to eliminate the indoor unit air outlet condensation risk; wherein, determining whether the indoor unit water flow exceeds the normal water flow state according to the size relationship between the inlet water temperature and a preset inlet water temperature and the size relationship between the outlet water temperature and a preset outlet water temperature, comprises: After the indoor unit in the refrigeration operation keeps the same air damper continuously running for a preset time, the water inlet temperature and the water outlet temperature of the indoor unit are collected, and the water inlet temperature average value and the water outlet temperature average value of all the indoor units in the refrigeration operation are calculated and the water outlet temperature average value ​ if the average value of the inlet water temperature , and the average value of the outlet water temperature , then it is determined that the water flow of the indoor unit exceeds the normal water flow state; wherein, is a preset inlet water temperature, is a preset outlet water temperature, is a preset fluctuation margin; wherein, the system comprises one outdoor unit and multiple indoor units, and an air conditioning water valve is arranged in the return water pipeline of each indoor unit.

2. The method of claim 1, wherein, acquiring total cooling capacity of all indoor units in the system in refrigeration operation and with air conditioning water valves opened, comprises: acquiring the air damper of all indoor units in refrigeration operation and with air conditioning water valves opened; determining the corresponding cooling capacity according to the air damper of each indoor unit to calculate the total cooling capacity of all indoor units in refrigeration operation and with air conditioning water valves opened.

3. The method of claim 1, wherein, determining whether to start an indoor unit air outlet anti-condensation mode according to the total cooling capacity, comprises: determining whether the total cooling capacity is less than a preset proportion of the rated refrigeration capacity of the outdoor unit; if yes, it is determined to start the indoor unit air outlet anti-condensation mode; if not, it is determined not to start or exit the indoor unit air outlet anti-condensation mode.

4. The method of claim 1, wherein, re-detecting the outlet water temperature after a preset time interval, and determining whether there is an indoor unit air outlet condensation risk according to the size relationship between the re-detected outlet water temperature and a preset outlet water temperature, comprises: The water outlet temperature is detected again after a preset time interval, and the average value of the water outlet temperatures of all indoor units in cooling operation is obtained ; If the outlet water temperature average value determines that there is a risk of indoor unit air outlet condensation; If the outlet water temperature average value determination of the absence of the indoor unit air outlet condensation risk; wherein, is a preset outlet water temperature, is a preset fluctuation margin.

5. The method of claim 1, wherein, determining a target indoor unit among the indoor units not started, comprises: acquiring the ambient temperature of each indoor unit not started and the set temperature of each indoor unit in refrigeration operation; comparing the ambient temperature with the set temperature to determine the indoor unit not started with the largest temperature difference value and the indoor unit in refrigeration operation according to the size of the temperature difference value, and determining the indoor unit not started as the target indoor unit.

6. The method of claim 1, wherein, after determining a target indoor unit among the indoor units not started and starting the air conditioning water valve corresponding to the target indoor unit, the method further comprises: After the interval preset duration, the outlet water temperature average of all indoor units in the refrigeration operation is re-detected ; If the average value of the outlet water temperature Then, the air conditioning water valve corresponding to the target indoor unit is closed. If the average value of the outlet water temperature then the current operating state of the system is maintained; If the average value of the outlet water temperature If the average value of the outlet water temperature If the average value of the outlet water temperature wherein, is a preset outlet water temperature, is a preset fluctuation margin.

7. The method of claim 6, wherein, after determining a second target indoor unit among the indoor units not started and starting the air conditioning water valve corresponding to the second target indoor unit, the method further comprises: After the interval preset duration, the outlet water temperature average of all indoor units in the refrigeration operation is re-detected ; If the average value of the outlet water temperature Then, the air conditioning water valve corresponding to the second target indoor unit is closed. If the average value of the outlet water temperature then the current operating state of the system is maintained; If the average value of the outlet water temperature an alarm information of the indoor unit air outlet condensation risk is sent.

8. A dew condensation control device for a water multi-connected air conditioning system for implementing the dew condensation control method for the water multi-connected air conditioning system according to any one of claims 1 to 7, characterized by the device comprises: The first judging module is configured to acquire total cooling capacity of all indoor units in the system which are in refrigeration operation and have open air conditioning water valves; and determine whether to start the indoor unit air outlet anti-condensation mode according to the total cooling capacity. The second judging module is configured to, after determining to start the indoor unit air outlet anti-condensation mode, acquire the inlet water temperature and outlet water temperature of refrigerated water of each indoor unit in refrigeration operation; and determine whether there is a risk of indoor unit air outlet condensation according to the inlet water temperature and the outlet water temperature. The processing module is configured to, when there is a risk of indoor unit air outlet condensation, determine a target indoor unit from the indoor units which are not started, and start the air conditioning water valve corresponding to the target indoor unit to eliminate the risk of indoor unit air outlet condensation. The system includes one outdoor unit and multiple indoor units, and an air conditioning water valve is arranged in a one-to-one correspondence in the return water pipeline of each indoor unit.

9. A water multi-split air conditioning system, characterized by, The water multi-connected air conditioning system comprises the anti-condensation control device of the water multi-connected air conditioning system according to claim 8.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the method according to any one of claims 1 to 7.

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