Water pump control method, device, air conditioner and computer-readable storage medium

Abstract

Embodiments of the present invention provide a water pump control method, device, air conditioner, and computer-readable storage medium, relating to the field of air conditioner control technology. The air conditioner is provided with a DC water pump, and the air conditioner stores a correspondence between the DC water pump's rated current and water pump speed. When the DC water pump is operating at a set speed, the air conditioner obtains the DC water pump's current current and determines the DC water pump's current rated current based on the set speed and the correspondence. If the DC water pump's current rated current and current current do not meet a preset stability condition, the air conditioner determines an updated speed for the DC water pump based on the DC water pump's current rated current and current current, and uses the updated speed as the set speed until the DC water pump's current rated current and current current meet the stability condition. Compared to existing technologies, this method can reduce the air conditioner's energy consumption and overall noise, thereby improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioner control, and in particular to a water pump control method and device, an air conditioner, and a computer-readable storage medium. Background Art

[0002] Currently, most ducted or ceiling mounted units are equipped with an AC water pump to drain water during cooling or dehumidification operation.

[0003] In the existing technology, the AC water pump often continues to run at a fixed high speed after the cooling mode or dehumidification mode is turned on. Therefore, the actual operation of the water pump is not taken into consideration, which increases the energy consumption of the air conditioner and the overall noise of the air conditioner, thereby affecting the user experience. Summary of the Invention

[0004] The problem solved by the present invention is how to adjust the water pump speed based on the actual operation of the water pump, reduce the energy consumption and overall noise of the air conditioner, and improve the user experience.

[0005] To solve the above problems, an embodiment of the present invention provides a water pump control method, device, air conditioner and computer-readable storage medium, so as to adjust the water pump speed based on the actual operation of the water pump, thereby reducing the energy consumption and overall noise of the air conditioner and improving the user experience.

[0006] In order to achieve the above objectives, the technical solutions adopted in the embodiments of the present invention are as follows:

[0007] In a first aspect, the present invention provides a water pump control method, which is applied to an air conditioner, wherein the air conditioner is provided with a DC water pump, and the air conditioner stores a correspondence between the rated current of the DC water pump and the water pump speed. The method comprises:

[0008] When the DC water pump is running at a set speed, obtaining a current current of the DC water pump, and determining a current rated current of the DC water pump according to the set speed and the corresponding relationship;

[0009] If the current rated current and current current of the DC water pump do not meet the preset stability conditions, the updated speed of the DC water pump is determined based on the current rated current and current current of the DC water pump, and the updated speed is used as the set speed until the current rated current and current current of the DC water pump meet the stability conditions.

[0010] An embodiment of the present invention provides a water pump control method. An air conditioner is provided with a DC water pump, and a corresponding relationship between the rated current of the DC water pump and the water pump speed is stored. The air conditioner can determine the current rated current of the DC water pump based on the set speed and the corresponding relationship when the DC water pump is operating at a set speed. If the current rated current of the DC water pump and the obtained current current of the DC water pump do not meet a preset stability condition, an updated speed of the DC water pump is determined based on the current rated current and the current current of the DC water pump, and the updated speed is used as the set speed until the current rated current and the current current of the DC water pump meet the stability condition. Through this method, when the DC water pump is operating at the set speed, the set speed can be updated in combination with its current rated current and the current current. That is, the set speed of the DC water pump is updated based on the actual operating conditions of the water pump, thereby setting a suitable speed for it. Therefore, compared with the prior art, the energy consumption and overall noise of the air conditioner can be reduced, and the user experience can be improved.

[0011] In an optional embodiment, the method further comprises:

[0012] Determining whether the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to a first preset threshold for a consecutive preset number of times;

[0013] If the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to a first preset threshold for a consecutive preset number of times, it is determined that the current rated current and the current current of the DC water pump meet the stability condition.

[0014] In the water pump control method provided by an embodiment of the present invention, an air conditioner can determine that the current rated current and current current of a DC water pump meet a stability condition if the absolute value of the difference between the current rated current and current current of the DC water pump is less than or equal to a first preset threshold value for a predetermined number of consecutive times. By analyzing the current rated current and current current of the DC water pump, it can be determined whether the current desired speed of the DC water pump and the actual speed are in a relatively stable state.

[0015] In an optional embodiment, determining the updated rotation speed of the DC water pump according to the current rated current and the current current of the DC water pump includes:

[0016] If the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to a first preset threshold and the difference is not less than or equal to the first preset threshold for a consecutive preset number of times, determining that the updated speed of the DC water pump is the set speed;

[0017] If the absolute value of the difference between the current rated current and the current current of the DC water pump is greater than the first preset threshold, the updated speed of the DC water pump is determined according to the difference between the current rated current and the current current and the set speed.

[0018] The water pump control method provided by an embodiment of the present invention allows an air conditioner to determine that the updated speed of the DC water pump is the set speed if the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to a first preset threshold value and has not been less than or equal to the first preset threshold value for a predetermined number of consecutive times. Furthermore, if the absolute value of the difference between the current rated current and the current current of the DC water pump is greater than the first preset threshold value, the updated speed of the DC water pump is determined based on the difference between the current rated current and the current current and the set speed. This method allows for the rapid and accurate determination of the corresponding updated speed for the DC water pump based on its actual operating conditions.

[0019] In an optional embodiment, determining the updated speed of the DC water pump according to the difference between the current rated current and the current current and the set speed includes:

[0020] If the difference between the current rated current and the current current is greater than the first preset threshold and less than or equal to a second preset threshold, determining the updated speed to be the sum of the first preset parameter and the set speed;

[0021] If the difference between the current rated current and the current current is greater than the second preset threshold and less than or equal to a third preset threshold, determining the updated speed to be the sum of the second preset parameter and the set speed;

[0022] If the difference between the current rated current and the current current is greater than the third preset threshold, determining the updated speed to be the sum of the third preset parameter and the set speed;

[0023] The first preset parameter, the second preset parameter and the third preset parameter are all set according to a preset adjustment speed, and the first preset parameter is smaller than the second preset parameter, and the second preset parameter is smaller than the third preset parameter.

[0024] The water pump control method provided by an embodiment of the present invention allows an air conditioner to determine the updated speed as the sum of a first preset parameter and a set speed when the difference between the current rated current and the current current is greater than a first preset threshold and less than or equal to a second preset threshold; determine the updated speed as the sum of a second preset parameter and the set speed when the difference between the current rated current and the current current is greater than a second preset threshold and less than or equal to a third preset threshold; and determine the updated speed as the sum of a third preset parameter and the set speed when the difference between the current rated current and the current current is greater than a third preset threshold. This method allows the air conditioner to quickly and accurately determine the updated speed of the DC water pump based on the difference between the current rated current and the current current and the set speed.

[0025] In an optional embodiment, determining the updated speed of the DC water pump according to the difference between the current rated current and the current current and the set speed includes:

[0026] If the difference between the current rated current and the current current is less than the negative value of the first preset threshold and greater than or equal to a fourth preset threshold, determining that the updated speed is the difference between the set speed and a fourth preset parameter;

[0027] If the difference between the current rated current and the current current is less than the fourth preset threshold and greater than or equal to a fifth preset threshold, determining the updated speed to be the difference between the set speed and a fifth preset parameter;

[0028] If the difference between the current rated current and the current current is less than the fifth preset threshold, determining the updated speed to be the difference between the set speed and a sixth preset parameter;

[0029] The fourth preset parameter, the fifth preset parameter and the sixth preset parameter are all set according to a preset adjustment speed, and the fourth preset parameter is smaller than the fifth preset parameter, and the fifth preset parameter is smaller than the sixth preset parameter.

[0030] The water pump control method provided by an embodiment of the present invention allows the air conditioner to determine the updated speed as the difference between the set speed and a fourth preset parameter when the difference between the current rated current and the current current is less than the negative value of a first preset threshold and greater than or equal to a fourth preset threshold; determine the updated speed as the difference between the set speed and a fifth preset parameter when the difference between the current rated current and the current current is less than or equal to the fourth preset threshold and greater than or equal to a fifth preset threshold; and determine the updated speed as the difference between the set speed and a sixth preset parameter when the difference between the current rated current and the current current is less than the fifth preset threshold. Through this method, the air conditioner can quickly and accurately determine the updated speed of the DC water pump based on the difference between the current rated current and the current current and the set speed.

[0031] In an optional embodiment, the method further comprises:

[0032] If the current rated current and current current of the DC water pump meet the stability condition, the current current of the DC water pump is obtained again after a first preset time period until the current rated current and current current of the DC water pump meet the stability condition again.

[0033] The water pump control method provided by an embodiment of the present invention allows the air conditioner to obtain the current current of the DC water pump again after a first preset time period, if the current rated current and current current of the DC water pump meet the stability condition, thereby again determining whether the current rated current and current current of the DC water pump meet the preset stability condition, and adjusting the set speed again until the current rated current and current current of the DC water pump meet the stability condition again, and so on. This method can timely adjust the set speed of the DC water pump according to the current rated current and current voltage of the DC water pump during operation of the DC water pump, so that the DC water pump can operate at the appropriate set speed, further reducing the energy consumption and noise of the air conditioner, and thus improving the user experience.

[0034] In an optional embodiment, the method further comprises:

[0035] When the air conditioner is in cooling operation or dehumidification operation, if the frequency of the compressor is greater than a preset frequency, the DC water pump is controlled to stop running;

[0036] If the DC water pump is in a full water state, the full water speed is used as the set speed, and the DC water pump is controlled to operate at the set speed. In an optional embodiment, the method further includes:

[0037] Under standard installation conditions, the water receiving pan of the air conditioner is filled with water according to a preset water volume each time, and the DC water pump is controlled to operate for a second preset time at the current water volume;

[0038] When the water level is stable, obtaining multiple sets of operating data of the DC water pump; the operating data includes current and speed;

[0039] A corresponding relationship between the rated current of the DC water pump and the water pump speed is generated according to the current and speed in the multiple sets of operating data.

[0040] The water pump control method provided by an embodiment of the present invention allows an air conditioner to, under standard installation conditions, fill the air conditioner's water pan with water at a preset water volume each time, control a DC water pump to operate for a second preset time at the current water volume, and obtain multiple sets of DC water pump operating data, including current and speed, while the water level is stable. A corresponding relationship between the rated current of the DC water pump and the water pump speed can then be generated based on the current and speed data from the multiple sets of operating data. This method can obtain a corresponding relationship between the rated current of a DC water pump and the water pump speed.

[0041] In a second aspect, the present invention provides a water pump control device for an air conditioner, wherein the air conditioner is provided with a DC water pump, and the air conditioner stores a correspondence between the rated current of the DC water pump and the water pump speed, the device comprising:

[0042] an acquisition module, configured to acquire a current current of the DC water pump when the DC water pump is running at a set speed, and determine a current rated current of the DC water pump based on the set speed and the corresponding relationship;

[0043] A determination module is used to determine the updated speed of the DC water pump based on the current rated current and current current of the DC water pump if the current rated current and current current of the DC water pump do not meet the preset stability conditions, and use the updated speed as the set speed until the current rated current and current current of the DC water pump meet the stability conditions.

[0044] The water pump control device provided by an embodiment of the present invention is provided in an air conditioner, wherein a DC water pump is provided in the air conditioner and a corresponding relationship between the rated current of the DC water pump and the water pump speed is stored. The air conditioner can obtain the current current of the DC water pump through an acquisition module when the DC water pump is operating at a set speed, and determine the current rated current of the DC water pump based on the set speed and the corresponding relationship. Moreover, when the current rated current and current current of the DC water pump do not meet a preset stability condition, the determination module determines an updated speed of the DC water pump based on the current rated current and current current of the DC water pump, and uses the updated speed as the set speed until the current rated current and current current of the DC water pump meet the stability condition. With this device, when the DC water pump is operating at the set speed, the set speed can be updated based on its current rated current and current current. That is, the set speed of the DC water pump is updated based on the actual operating conditions of the water pump, thereby setting a suitable speed for the DC water pump. Therefore, compared with the prior art, the energy consumption and overall noise of the air conditioner can be reduced, and the user experience can be improved.

[0045] In a third aspect, the present invention provides an air conditioner, comprising a controller and a DC water pump, wherein the controller is in communication with the DC water pump, and the controller can execute a computer program to implement the method described in any one of the aforementioned embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A block diagram of an air conditioner provided by an embodiment of the present invention is shown;

[0047] Figure 2 A schematic flow chart of a water pump control method provided by an embodiment of the present invention is shown;

[0048] Figure 3 Another flow chart of a water pump control method according to an embodiment of the present invention is shown;

[0049] Figure 4 A schematic diagram showing the corresponding relationship between rated current and pump speed is shown;

[0050] Figure 5 A functional module diagram of a water pump control device provided by an embodiment of the present invention is shown;

[0051] Figure 6 Another functional module diagram of the water pump control device provided by an embodiment of the present invention is shown.

[0052] Description of reference numerals: 100 - indoor unit; 101 - DC water pump; 102 - controller; 110 - outdoor unit; 200 - acquisition module; 210 - determination module; 220 - control module. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0054] Figure 1 For a block diagram of an air conditioner according to an embodiment of the present invention, see Figure 1 The air conditioner includes an indoor unit 100 and an outdoor unit 110 , wherein the indoor unit 100 is connected to the outdoor unit 110 .

[0055] Optionally, the indoor unit 100 may be provided with a DC water pump 101 and a controller 102. The controller 102 may be communicatively connected with the DC water pump 101 to receive information sent by the DC water pump 101 and control the operation of the DC water pump 101. The controller 102 may implement the water pump control method provided in the embodiment of the present application by executing a computer program.

[0056] Optionally, the indoor unit 100 may store a correspondence between the rated current of the DC water pump 101 and the water pump speed.

[0057] Optionally, the air conditioner may be a central air conditioner, in which case the air conditioner may include a plurality of indoor units and at least one outdoor unit. In a possible implementation, the air conditioner may be a duct unit or a ceiling unit.

[0058] An embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a controller, the water pump control method provided in the embodiment of the present application can be implemented.

[0059] Next, the above Figure 1 The air conditioner in the embodiment is the execution subject, and the water pump control method provided by the embodiment of the present application is introduced as an example in combination with the flow chart. Specifically, Figure 2 A flow chart of the water pump control method provided in the embodiment of the present application is shown in FIG. Figure 2 , the method comprising:

[0060] Step S20, when the DC water pump is running at a set speed, obtaining the current current of the DC water pump, and determining the current rated current of the DC water pump according to the set speed and the corresponding relationship;

[0061] Optionally, the current current refers to the current actual current of the DC water pump. It can be understood that the current current can reflect the current actual speed of the DC water pump; the current rated current refers to the current that the DC water pump should have at the set speed.

[0062] In this embodiment, the air conditioner can directly obtain the current current of the DC water pump when the DC water pump runs at a set speed, and determine the current rated current of the DC water pump according to the set speed and the corresponding relationship.

[0063] Optionally, the current current can be the instantaneous current of the DC water pump at the current moment, or it can be the average value of the instantaneous current of the DC water pump at each moment within a preset time interval. For example, the average value of the current of the DC water pump recorded within 5 seconds is selected as the current current of the DC water pump.

[0064] Step S21: If the current rated current and current current of the DC water pump do not meet the preset stability conditions, the updated speed of the DC water pump is determined based on the current rated current and current current of the DC water pump, and the updated speed is used as the set speed until the current rated current and current current of the DC water pump meet the stability conditions.

[0065] In this embodiment, after obtaining the current current and current rated current of the air conditioner, the air conditioner can determine whether the current rated current and current current of the DC water pump meet the preset stability conditions. If not, the updated speed of the DC water pump is determined based on the current rated current and current current of the DC water pump, and the updated speed is used as the set speed until the current rated current and current current of the DC water pump meet the stability conditions.

[0066] It can be understood that after determining the updated speed, the air conditioner can control the DC water pump to operate according to the updated speed. At this time, the air conditioner can obtain the current current of the DC water pump again, and determine the current rated current of the DC water pump based on the updated speed and the corresponding relationship, thereby determining again whether the current rated current and the current current meet the preset stability conditions.

[0067] Optionally, the air conditioner may repeat the above steps when the current rated current and the current current of the DC water pump do not meet the preset stability condition, until the current rated current and the current current meet the stability condition.

[0068] An embodiment of the present invention provides a water pump control method. An air conditioner is provided with a DC water pump, and a corresponding relationship between the rated current of the DC water pump and the water pump speed is stored. The air conditioner can determine the current rated current of the DC water pump based on the set speed and the corresponding relationship when the DC water pump is operating at a set speed. If the current rated current of the DC water pump and the obtained current current of the DC water pump do not meet a preset stability condition, an updated speed of the DC water pump is determined based on the current rated current and the current current of the DC water pump, and the updated speed is used as the set speed until the current rated current and the current current of the DC water pump meet the stability condition. Through this method, when the DC water pump is operating at the set speed, the set speed can be updated in combination with its current rated current and the current current. That is, the set speed of the DC water pump is updated based on the actual operating conditions of the water pump, thereby setting a suitable speed for it. Therefore, compared with the prior art, the energy consumption and overall noise of the air conditioner can be reduced, and the user experience can be improved.

[0069] In addition, since central air conditioners are often equipped with multiple indoor units during installation, when multiple indoor units start running at the same time, it will cause a lot of energy waste. This method can greatly reduce the energy consumption and overall noise of the central air conditioner.

[0070] In one possible implementation, the air conditioner may continue to operate at the set speed without adjusting the set speed temporarily when determining that the current rated current and current current of the DC water pump meet the stability condition.

[0071] In this embodiment, in order to timely adjust the set speed of the DC water pump during the operation of the DC water pump, the air conditioner can also obtain the current current of the DC water pump again after a first preset time period when the current rated current and current current of the DC water pump meet the stability conditions, until the current rated current and current current of the DC water pump meet the stability conditions again.

[0072] Optionally, the first preset duration may be set in advance according to actual application conditions. In a possible implementation, the first preset duration may be longer than the above-mentioned preset time interval.

[0073] Optionally, the air conditioner can obtain the current current of the DC water pump again after the first preset time period when it is determined that the current rated current and current current of the DC water pump meet the stability conditions, and determine the current rated current of the DC water pump based on the set speed and the corresponding relationship, so as to judge again whether the current rated current and current current of the DC water pump meet the preset stability conditions, until the current rated current and current current of the DC water pump meet the stability conditions again, and so on.

[0074] Optionally, the air conditioner may end the above process when the DC water pump stops running, that is, the air conditioner may continue to perform the above adjustment steps during the operation of the DC water pump to timely adjust the set speed of the DC water pump.

[0075] In one example, when the DC water pump of the air conditioner is running at a set speed, the air conditioner obtains the current current of the DC water pump, determines its current rated current based on the set speed and the corresponding relationship, and determines whether the current rated current and current current of the DC water pump meet the preset stability conditions.

[0076] If the current rated current and current current of the DC water pump meet the preset stability conditions, the DC water pump may not update the set speed and continue to control the operation of the DC water pump according to the set speed. After the first preset time, the current current and current rated current of the DC water pump are obtained again, and stability judgment is performed again, and so on.

[0077] If the current rated current and current current of the DC water pump do not meet the preset stability conditions, the air conditioner can determine the updated speed of the DC water pump based on the current rated current and current current of the DC water pump, and use the updated speed as the set speed, and obtain the current rated current and current current corresponding to the set speed again, and determine again whether the current rated current and current current of the DC water pump meet the preset stability conditions, and so on, until the current rated current and current current of the DC water pump meet the stability conditions again.

[0078] In one possible implementation, the air conditioner can determine whether the current rated current of the DC water pump and the current current meet a preset stability condition by determining whether the absolute value of the difference between the current rated current of the DC water pump and the current current is less than or equal to a first preset threshold for a consecutive preset number of times.

[0079] In this case, if the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to the first preset threshold for a consecutive preset number of times, it is determined that the current rated current and the current current of the DC water pump meet the stability condition.

[0080] Optionally, the first preset threshold and the preset number of times may be set in advance according to actual application conditions. In one example, the preset number of times may be 3 times.

[0081] Optionally, the air conditioner may determine whether the current rated current and current current of the DC water pump meet the stability condition at preset time intervals after the absolute value of the difference between the current rated current and current current of the DC water pump is less than or equal to a first preset threshold for the first time.

[0082] It can be understood that if the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to the first preset threshold for a consecutive preset number of times, it means that the deviation between the current set speed of the DC water pump and its actual speed is small. At this time, the actual operating conditions of the DC water pump can be adapted to a suitable speed, and there is no need to maintain an excessively high speed to ensure smooth discharge of water. Therefore, there is no need to update the set speed at this time.

[0083] It can be understood that the stability condition refers to whether the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to the first preset threshold for a consecutive preset number of times.

[0084] In this embodiment, it can be understood that the current rated current and the current current of the DC water pump do not meet the stability condition, which may include the following two situations: 1. The absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to the first preset threshold and the number of consecutive preset times is not less than or equal to the first preset threshold; 2. The absolute value of the difference between the current rated current and the current current of the DC water pump is greater than the first preset threshold.

[0085] In this case, since the current rated current and the current current of the DC water pump do not meet the stability condition, the air conditioner needs to determine the updated speed of the DC water pump according to the current rated current and the current current of the DC water pump.

[0086] In this embodiment, the corresponding updated speed can be determined according to the above two situations. Specifically, the above step S21 determines the updated speed of the DC water pump according to the current rated current and current current of the DC water pump, which can also be achieved by the following steps:

[0087] If the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to a first preset threshold and the difference is less than or equal to the first preset threshold for a predetermined number of times consecutively, then determining that the updated speed of the DC water pump is the set speed;

[0088] Optionally, although the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to the first preset threshold for a consecutive number of times and has not reached the preset number of times, since the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to the first preset threshold at this time, it can be explained that the deviation between the current set speed of the DC water pump and its actual speed is small, and there is no need to adjust the set speed. In this case, the air conditioner can determine that the updated speed of the DC water pump is the set speed.

[0089] In an example, assuming that the above-mentioned preset number of times is 3 times and the preset time interval is 5s, the air conditioner can obtain the current current of the DC water pump when the DC water pump runs at a set speed, and determine its current rated current based on the set speed and the corresponding relationship, and determine whether the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to the first preset threshold.

[0090] If the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to a first preset threshold, the air conditioner can determine how many consecutive times the absolute value of the difference is less than or equal to the first preset threshold. If the consecutive number of times is 1, it means that the current rated current and the current current of the DC water pump do not meet the preset stability conditions at this time, so it is necessary to determine an updated speed. At this time, the updated speed is the set speed. After 5 seconds, the air conditioner obtains the current current of the DC water pump again, and determines its current rated current based on the set speed and the corresponding relationship, and determines whether the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to the first preset threshold.

[0091] If the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to a first preset threshold, the air conditioner can determine how many consecutive times the absolute value of the difference is less than or equal to the first preset threshold. At this time, the consecutive number of times is 2, which means that the current rated current and the current current of the DC water pump still do not meet the preset stability conditions. Therefore, it is necessary to determine an updated speed. At this time, the updated speed is the set speed. After 5 seconds, the air conditioner obtains the current current of the DC water pump again, and determines its current rated current based on the set speed and the corresponding relationship, and determines whether the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to the first preset threshold.

[0092] If the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to a first preset threshold, the air conditioner can determine how many consecutive times the absolute value of the difference is less than or equal to the first preset threshold. At this time, the consecutive number of times is 3 times, indicating that the current rated current and the current current of the DC water pump meet the preset stability conditions. Therefore, the update of the set speed can be suspended, and the DC water pump can be controlled to operate at the set speed. After the first preset time, the current current and the current rated current of the DC water pump are obtained for the next stability judgment.

[0093] If the absolute value of the difference between the current rated current and the current current of the DC water pump is greater than the first preset threshold, the updated speed of the DC water pump is determined according to the difference between the current rated current and the current current and the set speed.

[0094] Optionally, if the absolute value of the difference between the current rated current and the current current of the DC water pump is greater than a first preset threshold, it means that the deviation between the current set speed of the DC water pump and its actual speed is large, so the set speed needs to be updated. At this time, the air conditioner can determine the updated speed of the DC water pump based on the difference between the current rated current and the current current and the set speed.

[0095] Optionally, the situation in which the absolute value of the difference between the current rated current and the current current of the DC water pump is greater than the first preset threshold may occur when determining whether the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to the first preset threshold at any time within a preset number of times.

[0096] In one example, assuming the above-mentioned preset number of times is 3 times, the air conditioner can obtain the current current of the DC water pump when the DC water pump runs at a set speed, and determine its current rated current based on the set speed and the corresponding relationship, and determine whether the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to the first preset threshold.

[0097] If the absolute value of the difference between the current rated current and the current current of the DC water pump is greater than the first preset threshold, the air conditioner can directly determine the updated speed of the DC water pump based on the difference between the current rated current and the current current and the set speed.

[0098] In another example, if the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to a first preset threshold value, and the number of consecutive times is 1, the air conditioner can set the updated speed to the set speed, and obtain the current current and the current rated current of the DC water pump again to determine whether the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to the first preset threshold value.

[0099] If, during the re-determination process, the absolute value of the difference between the current rated current and the current current of the DC water pump is greater than the first preset threshold, the air conditioner can determine the updated speed of the DC water pump based on the difference between the current rated current and the current current and the set speed.

[0100] Optionally, since the absolute value of the difference between the current rated current and the current current of the DC water pump is greater than the first preset threshold, the current rated current may be greater than the current current or may be less than the current current. Therefore, the updated speed can be determined respectively for the case where the current rated current is greater than the current current, that is, the difference between the previous rated current and the current current is a positive value, and the case where the current rated current is less than the current current, that is, the difference between the previous rated current and the current current is a negative value.

[0101] It can be understood that if the current rated current is greater than the current current, it means that the actual speed of the DC water pump is less than the required speed, so it needs to be increased; if the current rated current is less than the current current, it means that the actual speed of the DC water pump is greater than the required speed, so it needs to be reduced.

[0102] Based on this, a preset parameter can be set to determine the updated rotation speed. In a possible implementation, the preset parameter can be set according to a preset adjustment rotation speed.

[0103] In one possible implementation, if the current rated current is greater than the current current, the updated speed can be determined to be the sum of the preset parameter and the set speed. Specifically, the above determination of the updated speed of the DC water pump based on the difference between the current rated current and the current current and the set speed can also be implemented by the following steps:

[0104] If the difference between the current rated current and the current current is greater than a first preset threshold value and less than or equal to a second preset threshold value, the updated speed is determined to be the sum of the first preset parameter and the set speed; if the difference between the current rated current and the current current is greater than a second preset threshold value and less than or equal to a third preset threshold value, the updated speed is determined to be the sum of the second preset parameter and the set speed;

[0105] If the difference between the current rated current and the current current is greater than a third preset threshold, determining the updated speed to be the sum of the third preset parameter and the set speed;

[0106] The first preset parameter, the second preset parameter and the third preset parameter are all set according to the preset adjustment speed, and the first preset parameter is smaller than the second preset parameter, and the second preset parameter is smaller than the third preset parameter.

[0107] It can be understood that the first preset threshold, the second preset threshold, and the third preset threshold are all positive numbers.

[0108] Optionally, the adjustment speed may be set in advance according to actual operating conditions. In one possible implementation, the adjustment speed may be 15 rpm-20 rpm.

[0109] Optionally, the first preset parameter, the second preset parameter and the third preset parameter can be the product of the first preset value, the second preset value and the third preset value and the adjusted speed respectively, and the first preset value is smaller than the second preset value, and the second preset value is smaller than the third preset value.

[0110] In one possible implementation, the first preset parameter, the second preset parameter, and the third preset parameter can be respectively expressed by the following formulas:

[0111] X1=k1*ΔN

[0112] X2=k2*ΔN

[0113] X3=k3*ΔN

[0114] Wherein, X1, X2, and X3 represent the first preset parameter, the second preset parameter, and the third preset parameter respectively; k1, k2, and k3 represent the first preset value, the second preset value, and the third preset value respectively; and ΔN represents the adjustment speed.

[0115] In an example, the first preset value may be 1-2, the second preset value may be 3-4, and the third preset value may be 5-6.

[0116] Optionally, the first preset threshold, the second preset threshold and the third preset threshold can be determined according to the maximum speed value, the minimum speed value, the maximum current value, the minimum current value and the first preset parameter, the second preset parameter and the third preset parameter respectively.

[0117] In one possible implementation, the first preset threshold, the second preset threshold, and the third preset threshold can be respectively expressed by the following formulas:

[0118]

[0119]

[0120]

[0121] Among them, I1, I2, and I3 represent the first preset threshold, the second preset threshold, and the third preset threshold, respectively. max Characterizes the maximum current value, I min Characterizes the minimum current value, N max Indicates the maximum speed value, N min Indicates the minimum speed value.

[0122] Optionally, the maximum current value is the rated current corresponding to the maximum speed value, and the minimum current value is the rated current corresponding to the minimum speed value.

[0123] It can be understood that the updated speed can be represented by the following formula:

[0124] N′=N+X1,I1<I0-I q ≤I2

[0125] N′=N+X2,I2<I0-I q ≤I3

[0126] N′=N+X3,I3<I0-I q

[0127] Among them, N′ represents the updated speed, N represents the set speed, I0 represents the current rated current, I q It is understood that the updated speed should be less than or equal to the maximum speed of the DC water pump.

[0128] In another possible implementation, if the current rated current is less than the current current, the updated speed can be determined as the difference between the preset parameter and the set speed. Specifically, the above determination of the updated speed of the DC water pump based on the difference between the current rated current and the current current and the set speed can also be implemented by the following steps:

[0129] If the difference between the current rated current and the current current is less than the negative value of the first preset threshold and greater than or equal to a fourth preset threshold, determining that the updated speed is the difference between the set speed and the fourth preset parameter;

[0130] If the difference between the current rated current and the current current is less than a fourth preset threshold and greater than or equal to a fifth preset threshold, determining that the updated speed is the difference between the set speed and the fifth preset parameter;

[0131] If the difference between the current rated current and the current current is less than a fifth preset threshold, determining the updated speed to be the difference between the set speed and a sixth preset parameter;

[0132] The fourth preset parameter, the fifth preset parameter and the sixth preset parameter are all set according to the preset adjustment speed, and the fourth preset parameter is smaller than the fifth preset parameter, and the fifth preset parameter is smaller than the sixth preset parameter.

[0133] It is understandable that the first preset threshold value may be a positive number, and the fourth preset threshold value and the fifth preset threshold value may be negative numbers. In one possible implementation, the fourth preset threshold value may be a negative number of the second preset threshold value, and the fifth preset threshold value may be a negative number of the third preset threshold value.

[0134] In a possible implementation, the fourth preset parameter, the fifth preset parameter, and the sixth preset parameter may be equal to the first preset parameter, the second preset parameter, and the third preset parameter, respectively.

[0135] In another possible implementation method, the fourth preset threshold, the fifth preset threshold, the fourth preset parameter, the fifth preset parameter and the sixth preset parameter can be reset according to actual conditions, wherein the setting method of the fourth preset threshold and the fifth preset threshold is similar to the setting method of the above-mentioned first preset threshold, the second preset threshold and the third preset threshold, and the setting method of the fourth preset parameter, the fifth preset parameter and the sixth preset parameter is similar to the setting method of the above-mentioned first preset parameter, the second preset parameter and the third preset parameter, which will not be repeated here.

[0136] It can be understood that the updated speed can be represented by the following formula:

[0137] N′=N-X4,I4≤I0-I q <I1

[0138] N′=N-X5,I5≤I0-I q <I4

[0139] N′=N-X6,I0-I q <I5

[0140] Among them, X4, X5, X6 represent the fourth preset parameter, the fifth preset parameter and the sixth preset parameter respectively, and I4 and I5 represent the fourth preset threshold and the fifth preset threshold respectively. It can be understood that

[0141] The update speed should be greater than or equal to the minimum speed of the DC water pump.

[0142] Optionally, in order to ensure the normal operation of the DC water pump, it can be determined that it is in a full water state when the DC water pump is controlled at the beginning, that is, when the air conditioner is in cooling operation or dehumidification operation, if the frequency of the compressor is greater than the preset frequency, the DC water pump is controlled to stop running; if the DC water pump is in a full water state, the full water speed is used as the set speed, and the DC water pump is controlled to run at the set speed.

[0143] Optionally, an identification bit can be set as a full water flag bit. In this case, if the air conditioner detects that the full water flag is on the full water flag bit, it can be determined that the DC water pump is in a full water state. For example, if the full water flag bit is Z and the full water flag is 1, the air conditioner can determine that the DC water pump is in a full water state when it detects that Z=1.

[0144] Optionally, the full water speed refers to the speed at which the DC water pump should run when it is in a full water state.

[0145] In this embodiment, the air conditioner can enter the water pump control mode when in cooling operation or dehumidification operation. At this time, the air conditioner can first determine whether the frequency of the compressor is greater than the preset frequency. If it is, the DC water pump is controlled to stop running. Then, when the DC water pump is in a full water state, the full water in the full water state is interpreted as the set speed, and the DC water pump is controlled to run according to the set speed, and then enter the above-mentioned update process.

[0146] Optionally, the air conditioner may generate in advance a correspondence between the rated current of the DC water pump and the water pump speed, and save it.

[0147] In a possible implementation, the corresponding relationship can be a fitting relationship formula between the rated voltage of the DC water pump and the water pump speed. Figure 2On the basis of Figure 3 For another flow chart of the water pump control method provided in the embodiment of the present application, please refer to Figure 3 , the method further comprises:

[0148] Step S10, under standard installation conditions, adding water to the water receiving pan of the air conditioner according to a preset water volume each time, and controlling the DC water pump to operate for a second preset time at the current water volume;

[0149] Optionally, the preset water volume and the second preset time can be set according to actual operating conditions. For example, if water is added 10 times to obtain operating data of 10 groups of DC water pumps, the preset water volume can be 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100% respectively, and the second preset time is set to 10s-20s.

[0150] In this example, the air conditioner can operate for 10s-20s at water volumes of 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%, respectively.

[0151] Step S11, when the water level is stable, obtaining multiple sets of operating data of DC water pumps; the operating data includes current and speed;

[0152] Optionally, the air conditioner operates at each preset water volume for a second preset time period, and then records the operating data of the DC water pump at each preset water volume, thereby obtaining multiple sets of operating data of the DC water pump.

[0153] In a possible implementation, the current refers to an average value of the current of the DC water pump within a preset time interval, and the rotational speed refers to the rotational speed of the DC water pump when the water level is stable under the water volume.

[0154] Step S12: generating a corresponding relationship between the rated current of the DC water pump and the water pump speed according to the current and speed in the multiple sets of operation data.

[0155] Optionally, the air conditioner may perform fitting on multiple sets of currents and rotational speeds, thereby generating a corresponding relationship between the rated current of the DC water pump and the rotational speed of the water pump.

[0156] In an example, see Figure 4 The air conditioner can use the current in each set of operating data as the rated current, and fit the relationship between the rated current and the water pump speed to obtain I0=A*N0.

[0157] Among them, I0 is the rated current, A is a constant, and N0 is the pump speed.

[0158] Optionally, Figure 5A functional module diagram of the water pump control device provided in the embodiment of the present application is shown in FIG. Figure 5 The water pump control device includes: an acquisition module 200 and a determination module 210.

[0159] The acquisition module 200 is used to acquire the current current of the DC water pump when the DC water pump is running at a set speed, and determine the current rated current of the DC water pump based on the set speed and the corresponding relationship;

[0160] It is understandable that the acquisition module 200 can also be used to perform the above step S20;

[0161] The determination module 210 is used to determine the updated speed of the DC water pump based on the current rated current and current current of the DC water pump if the current rated current and current current of the DC water pump do not meet the preset stability conditions, and use the updated speed as the set speed until the current rated current and current current of the DC water pump meet the stability conditions.

[0162] It is understandable that the determination module 210 can also be used to execute the above step S21.

[0163] Optionally, the determination module 210 is also used to determine whether the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to a first preset threshold for a consecutive preset number of times; if the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to the first preset threshold for a consecutive preset number of times, it is determined that the current rated current and the current current of the DC water pump meet the stability condition.

[0164] Optionally, the determination module 210 is also used to determine that the updated speed of the DC water pump is the set speed if the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to a first preset threshold and is not less than or equal to the first preset threshold for a consecutive preset number of times; if the absolute value of the difference between the current rated current and the current current of the DC water pump is greater than the first preset threshold, determine the updated speed of the DC water pump based on the difference between the current rated current and the current current and the set speed.

[0165] Optionally, the determination module 210 is also used to determine that the updated speed is the sum of the first preset parameter and the set speed if the difference between the current rated current and the current current is greater than the first preset threshold and less than or equal to the second preset threshold; if the difference between the current rated current and the current current is greater than the second preset threshold and less than or equal to the third preset threshold, then the updated speed is determined to be the sum of the second preset parameter and the set speed; if the difference between the current rated current and the current current is greater than the third preset threshold, then the updated speed is determined to be the sum of the third preset parameter and the set speed; the first preset parameter, the second preset parameter and the third preset parameter are all set according to the preset adjustment speed, and the first preset parameter is less than the second preset parameter, and the second preset parameter is less than the third preset parameter.

[0166] Optionally, the determination module 210 is also used to determine that the updated speed is the difference between the set speed and the fourth preset parameter if the difference between the current rated current and the current current is less than the negative value of the first preset threshold and greater than or equal to the fourth preset threshold; if the difference between the current rated current and the current current is less than the fourth preset threshold and greater than or equal to the fifth preset threshold, the updated speed is determined to be the difference between the set speed and the fifth preset parameter; if the difference between the current rated current and the current current is less than the fifth preset threshold, the updated speed is determined to be the difference between the set speed and the sixth preset parameter; the fourth preset parameter, the fifth preset parameter and the sixth preset parameter are all set according to the preset adjustment speed, and the fourth preset parameter is less than the fifth preset parameter, and the fifth preset parameter is less than the sixth preset parameter.

[0167] Optionally, the acquisition module 200 is also used to obtain the current current of the DC water pump again after a first preset time period if the current rated current and current current of the DC water pump meet the stability condition, until the current rated current and current current of the DC water pump meet the stability condition again.

[0168] Optionally, in Figure 5 On the basis of Figure 6 For another functional module diagram of the water pump control device provided in the embodiment of the present application, please refer to Figure 6 The water pump control device also includes: a control module 220.

[0169] Optionally, the control module 220 is used to control the DC water pump to stop running if the frequency of the compressor is greater than a preset frequency when the air conditioner is in cooling operation or dehumidification operation; if the DC water pump is in a full water state, the full water speed is used as the set speed to control the DC water pump to run at the set speed.

[0170] Optionally, the control module 220 is also used to add water to the water receiving pan of the air conditioner according to a preset water volume each time under standard installation conditions, and control the DC water pump to operate for a second preset time at the current water volume; when the water level is stable, obtain multiple sets of DC water pump operating data; the operating data includes current and speed; based on the current and speed in the multiple sets of operating data, generate a corresponding relationship between the rated current of the DC water pump and the water pump speed.

[0171] It is understandable that the control module 220 can also be used to execute the above steps S10 to S12.

[0172] The water pump control device provided by an embodiment of the present invention is provided in an air conditioner, wherein a DC water pump is provided in the air conditioner and a corresponding relationship between the rated current of the DC water pump and the water pump speed is stored. The air conditioner can obtain the current current of the DC water pump through an acquisition module when the DC water pump is operating at a set speed, and determine the current rated current of the DC water pump based on the set speed and the corresponding relationship. Moreover, when the current rated current and current current of the DC water pump do not meet a preset stability condition, the determination module determines an updated speed of the DC water pump based on the current rated current and current current of the DC water pump, and uses the updated speed as the set speed until the current rated current and current current of the DC water pump meet the stability condition. With this device, when the DC water pump is operating at the set speed, the set speed can be updated based on its current rated current and current current. That is, the set speed of the DC water pump is updated based on the actual operating conditions of the water pump, thereby setting a suitable speed for the DC water pump. Therefore, compared with the prior art, the energy consumption and overall noise of the air conditioner can be reduced, and the user experience can be improved.

[0173] The present invention is disclosed as above, but the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A water pump control method, characterized in that: Applied to an air conditioner, the air conditioner is provided with a DC water pump, and the air conditioner stores a correspondence between the rated current of the DC water pump and the water pump speed, the correspondence being a fitting formula between the rated current and the water pump speed. The method includes: When the DC water pump is running at a set speed, obtaining a current current of the DC water pump, and determining a current rated current of the DC water pump according to the set speed and the corresponding relationship; If the current rated current and current current of the DC water pump do not meet the preset stability conditions, the updated speed of the DC water pump is determined based on the current rated current and current current of the DC water pump, and the updated speed is used as the set speed. The above steps are repeated until the current rated current and current current of the DC water pump meet the stability conditions.

2. The method according to claim 1, characterized in that The method further comprises: Determining whether the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to a first preset threshold for a consecutive preset number of times; If the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to a first preset threshold for a consecutive preset number of times, it is determined that the current rated current and the current current of the DC water pump meet the stability condition.

3. The method according to claim 1, characterized in that The step of determining an updated rotation speed of the DC water pump according to the current rated current and the current current of the DC water pump includes: If the absolute value of the difference between the current rated current and the current current of the DC water pump is less than or equal to a first preset threshold and the difference is not less than or equal to the first preset threshold for a consecutive preset number of times, determining that the updated speed of the DC water pump is the set speed; If the absolute value of the difference between the current rated current and the current current of the DC water pump is greater than the first preset threshold, the updated speed of the DC water pump is determined according to the difference between the current rated current and the current current and the set speed.

4. The method according to claim 3, characterized in that The step of determining the updated speed of the DC water pump according to the difference between the current rated current and the current current and the set speed includes: If the difference between the current rated current and the current current is greater than the first preset threshold and less than or equal to a second preset threshold, determining the updated speed to be the sum of the first preset parameter and the set speed; If the difference between the current rated current and the current current is greater than the second preset threshold and less than or equal to a third preset threshold, determining the updated speed to be the sum of the second preset parameter and the set speed; If the difference between the current rated current and the current current is greater than the third preset threshold, determining the updated speed to be the sum of the third preset parameter and the set speed; The first preset parameter, the second preset parameter and the third preset parameter are all set according to a preset adjustment speed, and the first preset parameter is smaller than the second preset parameter, and the second preset parameter is smaller than the third preset parameter.

5. The method according to claim 3, characterized in that The step of determining the updated speed of the DC water pump according to the difference between the current rated current and the current current and the set speed includes: If the difference between the current rated current and the current current is less than the negative value of the first preset threshold and greater than or equal to a fourth preset threshold, determining that the updated speed is the difference between the set speed and a fourth preset parameter; If the difference between the current rated current and the current current is less than the fourth preset threshold and greater than or equal to a fifth preset threshold, determining the updated speed to be the difference between the set speed and a fifth preset parameter; If the difference between the current rated current and the current current is less than the fifth preset threshold, determining the updated speed to be the difference between the set speed and a sixth preset parameter; The fourth preset parameter, the fifth preset parameter and the sixth preset parameter are all set according to a preset adjustment speed, and the fourth preset parameter is smaller than the fifth preset parameter, and the fifth preset parameter is smaller than the sixth preset parameter.

6. The method according to claim 1, characterized in that The method further comprises: If the current rated current and current current of the DC water pump meet the stability condition, the current current of the DC water pump is obtained again after a first preset time period until the current rated current and current current of the DC water pump meet the stability condition again.

7. The method according to claim 1, characterized in that The method further comprises: When the air conditioner is in cooling operation or dehumidification operation, if the frequency of the compressor is greater than a preset frequency, the DC water pump is controlled to stop running; If the DC water pump is in a full water state, the full water speed is used as the set speed, and the DC water pump is controlled to operate at the set speed.

8. The method according to claim 1, characterized in that The method further comprises: Under standard installation conditions, the water receiving pan of the air conditioner is filled with water according to a preset water volume each time, and the DC water pump is controlled to operate for a second preset time at the current water volume; When the water level is stable, obtaining multiple sets of operating data of the DC water pump; the operating data includes current and speed; A corresponding relationship between the rated current of the DC water pump and the water pump speed is generated according to the current and speed in the multiple sets of operating data.

9. A water pump control device, characterized in that: Applied to an air conditioner, the air conditioner is provided with a DC water pump, and the air conditioner stores a correspondence between the rated current of the DC water pump and the water pump speed, the correspondence being a fitting formula between the rated current and the water pump speed. The device comprises: an acquisition module, configured to acquire a current current of the DC water pump when the DC water pump is running at a set speed, and determine a current rated current of the DC water pump based on the set speed and the corresponding relationship; A determination module is used to determine an updated speed of the DC water pump based on the current rated current and current current of the DC water pump if the current rated current and current current of the DC water pump do not meet the preset stability condition, and use the updated speed as the set speed, and repeat the above steps until the current rated current and current current of the DC water pump meet the stability condition.

10. An air conditioner, characterized in that: The method comprises a controller and a DC water pump, wherein the controller is in communication with the DC water pump, and the controller can execute a computer program to implement any one of the methods described in claims 1-8.

Images