A method and system for detecting the operating status of a water pump

Abstract

This invention provides a method and system for detecting the operating status of a water pump. The method includes: acquiring the current rotational speed of the water pump; comparing the current rotational speed with the average rotational speed over a previous time period; and determining the operating status of the water pump based on the comparison result. This solves the technical problem in the prior art where directly determining the operating status of a water pump based on its rotational speed is inaccurate.

Description

Technical Field

[0001] This invention relates to the field of water pump testing, and more specifically to a method and system for detecting the operating status of a water pump. Background Technology

[0002] In some home appliance sectors, due to overall functional requirements, it is necessary to determine whether there is water in the tank by detecting the operating status of the water pump. Current technology often determines the water pump's operating status directly by detecting its rotational speed.

[0003] It should be noted that variations in the design of the water pump itself, as well as variations in the power supply voltage, can affect the pump's rotational speed. In such cases, the rotational speeds when there is water and when there is no water may be similar or overlap, leading to misjudgment and affecting user experience.

[0004] Therefore, in the existing technology, the method of directly judging the operating status of a water pump based on its rotational speed is inaccurate. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a method and system for detecting the operating status of a water pump, so as to solve the technical problem that the method of directly judging the operating status of a water pump based on the pump speed in the prior art is inaccurate.

[0006] According to a first aspect of the present invention, a method for detecting the operating status of a water pump is provided, the method comprising: acquiring the current rotational speed of the water pump; comparing the current rotational speed with the average rotational speed of the previous time period; and determining the operating status of the water pump based on the comparison result.

[0007] Furthermore, before comparing the current rotational speed with the average rotational speed of the previous time period, the method includes: correcting the average rotational speed of the previous time period according to a set value.

[0008] Further, determining the operating status of the water pump based on the comparison results includes: determining the operating status of the water pump as low water when the current rotational speed is greater than the average rotational speed; and determining the operating status of the water pump as having water when the current rotational speed is not greater than the average rotational speed.

[0009] Furthermore, if the current rotational speed is greater than the second preset rotational speed but less than the first preset rotational speed, the current rotational speed is compared with the standard average rotational speed of the previous time period.

[0010] Furthermore, the method further includes: determining the operating state of the water pump as dry pumping when the current rotational speed is greater than or equal to the first preset rotational speed; and determining the operating state of the water pump as stalled when the current rotational speed is less than or equal to the second preset rotational speed.

[0011] Furthermore, the method also includes: determining the output mode of the operating state based on the operating state of the water pump.

[0012] Furthermore, the output mode of the operating state is determined according to the operating state of the water pump, including: when the operating state is dry pumping, the operating state is output through a preset first preset pulse signal; when the operating state is stalled, the operating state is output through a high level; when the operating state is water present, the operating state is output through a low level; and when the operating state is low water, the operating state is output through a second preset pulse signal.

[0013] According to a second aspect of the present invention, a method for detecting the operating status of a water pump is provided. The method includes: obtaining the current rotational speed of the water pump; if the current rotational speed is greater than or equal to a first preset rotational speed or less than or equal to a second rotational speed, directly determining the operating status of the water pump; if the current rotational speed is greater than the second rotational speed and less than the first preset rotational speed, obtaining the average rotational speed of the water pump in the previous time period, and determining the operating status of the water pump based on a comparison between the current rotational speed and the average rotational speed in the previous time period.

[0014] According to a third aspect of the present invention, a system for detecting the operating status of a water pump is provided. The system includes: a speed detection module for detecting the current speed of the water pump; a controller for establishing a communication relationship with the speed detection module and for receiving the current speed, wherein the controller compares the current speed with the average speed over a previous time period and determines the operating status of the water pump based on the comparison result; and a status output module for establishing a communication relationship with the controller and for outputting the operating status of the water pump.

[0015] Furthermore, the speed detection module is a Hall effect speed sensor.

[0016] This invention provides a method and system for detecting the operating status of a water pump. The method includes: acquiring the current rotational speed of the water pump; comparing the current rotational speed with the average rotational speed over a previous time period; and determining the operating status of the water pump based on the comparison result. This solves the technical problem in the prior art where directly determining the operating status of a water pump based on its rotational speed is inaccurate. Attached Figure Description

[0017] Figure 1 This is a flowchart of a method for detecting the operating status of a water pump provided in an embodiment of the present invention;

[0018] Figure 2 This is a flowchart of an optional method for detecting the operating status of a water pump provided in an embodiment of the present invention;

[0019] Figure 3 This is a flowchart of an optional method for detecting the operating status of a water pump provided in an embodiment of the present invention;

[0020] Figure 4 This is a flowchart of a water pump operation status detection system provided in an embodiment of the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] Example 1

[0023] This embodiment provides a method for detecting the operating status of a water pump, combined with Figure 1 The method includes:

[0024] Step S11: Obtain the current speed of the water pump.

[0025] Step S13: Compare the current rotational speed with the average rotational speed of the previous time period.

[0026] Step S15: Determine the operating status of the water pump based on the comparison results.

[0027] Specifically, this solution uses the water pump controller as the execution entity of the method in this application. This solution can obtain the current speed of the water pump using a Hall effect speed sensor. The average speed of the previous time period can be the average speed of the water pump 5 seconds ago. This solution compares the current speed with the average speed of the previous time period; that is, this solution determines the operating status of the water pump by the deviation between the current speed and the average speed of the previous time period. Optionally, before step S11, this solution can control the water pump to run continuously for a preset time (e.g., 10 seconds) to ensure the water pump operates stably before obtaining the current speed, thus providing a data basis for the subsequent comparison with the average speed of the previous time period.

[0028] It should be noted that in existing technologies, directly judging the pump's operating status based solely on its rotational speed leads to inaccurate results. However, this solution differs from existing technologies. This solution accurately determines the pump's operating status by analyzing the deviation between the current rotational speed and the average rotational speed over the previous time period. Therefore, this solution solves the technical problem of inaccurate judgments based solely on pump rotational speed in existing technologies.

[0029] It should also be noted that while existing technologies sometimes use additional level switches or float switches in electrical components to determine the pump's operating status, this undoubtedly increases hardware consumption. This solution uses control logic to accurately determine the pump's operating status, resolving the problem of signal misinterpretation caused by pump speed identification without adding external components. It also solves the technical problem of high hardware consumption in existing technologies for determining pump operating status.

[0030] Optionally, before comparing the current rotational speed with the average rotational speed over the previous time period, the method includes:

[0031] The average rotational speed of the previous time period is corrected based on the set value.

[0032] Specifically, since different models of water pumps have different operating conditions, this solution can correct the average speed of the previous time period based on the value set by the user, so as to make the water pump operation status judgment method in this solution more accurate. For example, the average speed of the first time period = the actual average speed of the first time period ± 200.

[0033] Optionally, step S15 determines the operating status of the water pump based on the comparison results, including:

[0034] Step S151: When the current rotational speed is greater than the average rotational speed, the operating state of the water pump is determined to be low water.

[0035] Step S152: If the current rotation speed is not greater than the average rotation speed, determine that the water pump is in operation with water.

[0036] Specifically, in this scheme, for example, if the current speed of the water pump is greater than the average speed over 5 seconds, then this scheme determines the water pump's operating state as low water. If the current speed of the water pump is less than or equal to the average speed over 5 seconds, then this scheme determines the water pump's operating state as having water.

[0037] It should be noted that, since this solution can correct for the average rotational speed, the above embodiment can also be: if the current rotational speed of the water pump is greater than the average rotational speed of 5 seconds ± 200, then this solution determines the water pump's operating state as low water. If the current rotational speed of the water pump is less than or equal to the average rotational speed of 5 seconds ± 200, then this solution determines the water pump's operating state as having water.

[0038] Optionally, if the current rotational speed is greater than the second preset rotational speed but less than the first preset rotational speed, the current rotational speed is compared with the average rotational speed of the previous time period.

[0039] Specifically, after obtaining the current speed, this solution can first compare the current speed with the second preset speed and the first preset speed set by the user. The second preset speed can be 1200 rpm and the first preset speed can be 6000 rpm. If the current speed of the water pump is greater than 1200 rpm and less than 6000 rpm, this solution will execute the above step S13.

[0040] Optionally, the method of this scheme may also include:

[0041] If the current rotational speed is greater than or equal to the first preset rotational speed, the operating state of the water pump is determined to be dry pumping;

[0042] If the current rotational speed is less than or equal to the second preset rotational speed, the pump is determined to be in a stalled state.

[0043] Specifically, for example, if the current speed is greater than or equal to 6000 rpm, this solution determines the water pump's operating state as vacuum. If the current speed is less than or equal to 1200 rpm, this solution determines the water pump's operating state as stalled.

[0044] Optionally, the method further includes:

[0045] The output mode of the operating state is determined based on the operating state of the water pump.

[0046] Specifically, after determining the different operating states of the water pump, this solution can select different output modes according to the operating state in order to distinguish between the different operating states.

[0047] Optionally, the output mode of the operating state is determined according to the operating state of the water pump, including:

[0048] When the operating state is empty pumping, the operating state is output through a preset first preset pulse signal;

[0049] When the operating state is stalled, the operating state is output through a high level.

[0050] When the operating state is that there is water, the operating state is output by a low level.

[0051] When the operating state is low water, the operating state is output through a second preset pulse signal.

[0052] Example 2

[0053] This solution also provides a method for detecting the operating status of a water pump, combined with... Figure 2 The method includes:

[0054] Step S21: Obtain the current speed of the water pump.

[0055] Step S23: If the current rotation speed is greater than or equal to the first preset rotation speed or less than or equal to the second rotation speed, the operating status of the water pump is directly determined.

[0056] Step S25: When the current rotational speed is greater than the second rotational speed but less than the first preset rotational speed, obtain the average rotational speed of the water pump in the previous time period, and determine the operating status of the water pump based on the comparison result between the current rotational speed and the average rotational speed in the previous time period.

[0057] It should be noted that in existing technologies, directly determining the pump's operating status based solely on its rotational speed leads to inaccurate results. However, this solution differs from existing technologies. This solution first determines whether the current rotational speed meets a preset relationship. If the preset relationship is met (e.g., the current rotational speed is greater than or equal to a first preset speed or less than or equal to a second preset speed), this solution directly determines the pump's operating status based on the current rotational speed. If the preset relationship is not met, this solution accurately determines the pump's operating status by comparing the current rotational speed with the average rotational speed over the previous time period. Therefore, this solution solves the technical problem of inaccurate judgments based solely on pump rotational speed in existing technologies.

[0058] The following combination Figure 3 Examples of steps S21 to S23 above are provided below:

[0059] First, the water pump is controlled to run continuously for 10 seconds. Then, the pump speed is detected. If the speed is greater than 6000 rpm, the pump is directly determined to be in a dry-running state, and a 10Hz pulse signal is output. If the speed is less than 1200 rpm, the pump is directly determined to be in a stalled state, and a high-level signal is output. If the speed is greater than 1200 rpm but less than 6000 rpm, this scheme further checks whether the speed is less than or equal to the average speed of the previous 5 seconds ± 200 rpm. If yes, the pump is determined to have water, and a low-level signal is output. If no, the pump is determined to have little water, and a 10Hz pulse signal is output. It should be noted that because the dry-running state and the low-water state are quite similar, this embodiment sets the output method for both to the same 10Hz pulse signal.

[0060] This solution detects the pump's operating status by detecting speed deviation, avoiding misjudgments caused by similar or overlapping pump speeds when the pump has water or not. This solution does not require additional hardware to the pump, achieving accurate identification of the pump's operating status without adding hardware (such as float switches, proximity switches, or level probes).

[0061] Example 3

[0062] This application also provides a system for detecting the operating status of a water pump, which can be used to implement the methods of Embodiment 1 and Embodiment 2 described above, in combination with... Figure 4 The system includes:

[0063] The speed detection module 40 is used to detect the current speed of the water pump M.

[0064] The controller 42 establishes a communication relationship with the speed detection module to receive the current speed. The controller compares the current speed with the average speed of the previous time period and determines the operating status of the water pump based on the comparison result.

[0065] The status output module 44 establishes a communication relationship with the controller and is used to output the operating status of the water pump. The operating status can be no water, stalled, low water, and normal.

[0066] This system accurately determines the pump's operating status by analyzing the signal interaction between the aforementioned devices and the deviation between the current pump speed and the average pump speed over the previous time period. Therefore, this solution solves the technical problem of inaccurate judgment of pump operating status based solely on pump speed in existing technologies.

[0067] Combination Figure 4 The system may also include a voltage regulator module 46, which provides a stable voltage for the controller and speed detection module. A drive module 48 is also included for driving the water pump.

[0068] Optionally, the speed detection module is a Hall effect speed sensor.

[0069] Of course, those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware (such as a processor, controller, etc.). The program can be stored in a computer-readable storage medium, and when executed, it can include the processes described in the above method embodiments. The storage medium can be a memory, magnetic disk, optical disk, etc.

[0070] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for detecting the operating status of a water pump, characterized in that, include: Obtain the current speed of the water pump; Compare the current rotational speed with the average rotational speed of the previous time period; The operating status of the water pump is determined based on the comparison results; Before comparing the current rotational speed with the average rotational speed of the previous time period, the method includes: The average rotational speed of the previous time period is corrected based on the set value; The operating status of the water pump is determined based on the comparison results, including: When the current rotational speed is greater than the average rotational speed, the operating state of the water pump is determined to be low water. If the current rotational speed is not greater than the average rotational speed, the pump is determined to be in operation with water.

2. The method according to claim 1, characterized in that, If the current rotational speed is greater than the second preset rotational speed but less than the first preset rotational speed, the current rotational speed is compared with the standard average rotational speed of the previous time period.

3. The method according to claim 2, characterized in that, The method further includes: If the current rotational speed is greater than or equal to the first preset rotational speed, the operating state of the water pump is determined to be dry pumping; If the current rotational speed is less than or equal to the second preset rotational speed, the pump is determined to be in a stalled state.

4. The method according to claim 1, characterized in that, The method further includes: The output mode of the operating state is determined based on the operating state of the water pump.

5. The method according to claim 4, characterized in that, Based on the operating status of the water pump, the output mode of the operating status is determined, including: When the operating state is empty pumping, the operating state is output through a preset first preset pulse signal; When the operating state is stalled, the operating state is output through a high level. When the operating state is that there is water, the operating state is output by a low level. When the operating state is low water, the operating state is output through a second preset pulse signal.

6. A method for detecting the operating status of a water pump, characterized in that, The method includes: Obtain the current speed of the water pump; When the current rotational speed is greater than or equal to the first preset rotational speed or less than or equal to the second rotational speed, the operating status of the water pump is directly determined; When the current rotational speed is greater than the second rotational speed but less than the first preset rotational speed, the average rotational speed of the water pump in the previous time period is obtained, and the operating status of the water pump is determined based on the comparison between the current rotational speed and the average rotational speed in the previous time period.

7. A system for detecting the operating status of a water pump, characterized in that, The system includes: The speed detection module is used to detect the current speed of the water pump; The controller establishes a communication relationship with the speed detection module to receive the current speed. The controller compares the current speed with the average speed of the previous time period and determines the operating status of the water pump based on the comparison result. The status output module establishes a communication relationship with the controller and is used to output the operating status of the water pump.

8. The system according to claim 7, characterized in that, The speed detection module is a Hall effect speed sensor.

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