Water pump control method and device, electronic equipment and storage medium

Abstract

The application relates to a water pump control method and device, electronic equipment and a storage medium. The method comprises the following steps: obtaining a target parameter in a water system and a heat pump system, wherein the target parameter is a parameter associated with water flow in a water system pipeline in the water system and the heat pump system; detecting the water flow in the water system pipeline according to the target parameter; and controlling the working state of the water pump according to the detection result. In this way, the target parameter in the water system and the heat pump system is used to detect the water flow in the water system pipeline, and then the working state of the water pump is controlled according to the detection result, so that the false judgment caused by the detection of the water flow on the water system pipeline by using a water flow switch in the prior art is avoided, the detection accuracy is improved, and the problem of dry grinding of the water pump is effectively solved.

Description

Technical Field

[0001] This application relates to the field of heat pump multi-split water system technology, and in particular to a water pump control method, device, electronic equipment and storage medium. Background Technology

[0002] Heat pump multi-split water systems offer advantages such as energy efficiency, high comfort, and environmental friendliness, making them increasingly popular in daily life. However, if there is no water flow in the system pipes during operation, the water pump may experience dry running.

[0003] In existing technologies, water pump control typically involves using flow switches connected in series in the water system pipeline to detect the presence of water flow, and then controlling the pump's start and stop based on the detection result. However, when using flow switches to detect water flow in the pipeline, the flow switches will only activate when the water flow is sufficiently high, making it easy to misjudge the absence of water at low flow rates. Furthermore, the presence of air in the pipeline will also prevent the flow switches from activating, leading to a misjudgment of no water. Therefore, existing water pump control methods are prone to causing pump burn-in due to misjudgments of water flow in the pipeline. Summary of the Invention

[0004] This application provides a water pump control method, device, electronic equipment, and storage medium to solve the problem that existing water pump control methods are prone to causing water pump dry running due to misjudgment of water flow in water system pipelines.

[0005] In a first aspect, this application provides a water pump control method applied to a heat pump multi-split water system, wherein the heat pump multi-split water system includes a water system and a heat pump system, the water system including at least water system piping and a water pump, and the method includes:

[0006] Obtain target parameters in the water system and the heat pump system, wherein the target parameters are parameters in the water system and the heat pump system that are associated with the water flow in the water system pipeline;

[0007] The water flow in the water system pipeline is detected based on the target parameters.

[0008] Based on the test results, the operating status of the water pump is controlled.

[0009] Optionally, the heat pump system includes at least a refrigerant-side pipeline, a high-pressure sensor, and a condenser pipeline;

[0010] The acquisition of target parameters in the water system and the heat pump system includes:

[0011] When a water demand is detected in the water system and the heat pump system has been started and running, the operating parameters of the water system and the heat pump system are acquired within a preset time period.

[0012] The target parameter is obtained from the operating parameters, wherein the target parameter includes at least one of the following: the temperature change rate of the fluorine side pipeline within the preset time period, the high pressure value detected by the high pressure sensor, the temperature change rate of the water system pipeline, and the temperature value of the condenser pipeline.

[0013] Optionally, the target parameters include the temperature change rate of the fluorine-side pipeline and the high pressure value;

[0014] The step of detecting the water flow in the water system pipeline based on the target parameters includes:

[0015] The rate of temperature change of the fluorine-side pipeline is compared with a first preset threshold, and the high pressure value is compared with a second preset threshold.

[0016] If the rate of temperature change in the fluorine-side pipeline is greater than the first preset threshold and the high pressure value is greater than the second preset threshold, it is determined that there is no water flow in the water system pipeline.

[0017] If the rate of temperature change in the fluorine-side pipeline is less than or equal to the first preset threshold, or if the high pressure value is less than or equal to the second preset threshold, it is determined that there is water flow in the water system pipeline.

[0018] Optionally, the temperature change rate of the fluorine-side pipeline includes the temperature change rate of the fluorine-side inlet pipe and the temperature change rate of the fluorine-side outlet pipe.

[0019] The step of comparing the temperature change rate of the fluorine-side pipeline with a first preset threshold includes:

[0020] The rate of temperature change of the fluorine-side inlet pipe and the rate of temperature change of the fluorine-side outlet pipe are compared with the first preset threshold, respectively.

[0021] If both the rate of temperature change of the fluorine-side inlet pipe and the rate of temperature change of the fluorine-side outlet pipe are greater than the first preset threshold, it is determined that the rate of temperature change of the fluorine-side pipeline is greater than the first preset threshold.

[0022] If both the rate of temperature change of the fluorine-side inlet pipe and the rate of temperature change of the fluorine-side outlet pipe are less than or equal to the first preset threshold, then the rate of temperature change of the fluorine-side pipeline is determined to be less than or equal to the first preset threshold.

[0023] Optionally, before comparing the rate of temperature change of the fluorine-side pipeline with a first preset threshold and comparing the high pressure value with a second preset threshold, the method further includes:

[0024] Obtain the operating status of the heat pump system when a water demand is detected in the water system;

[0025] Based on the operating state of the heat pump system, the first preset threshold and the second preset threshold are determined, wherein the first preset threshold and the second preset threshold are different for different operating states of the heat pump system.

[0026] Optionally, controlling the operating state of the water pump based on the detection results includes:

[0027] If it is determined that there is water flow in the water system pipeline, the water pump is controlled to be in operation.

[0028] If it is determined that there is no water flow in the water system pipeline, the water pump is controlled to be stopped.

[0029] Optionally, the method further includes:

[0030] If it is determined that there is no water flow in the water system pipeline, a fault alarm will be output.

[0031] Secondly, this application provides a water pump control device applied to a heat pump multi-split water system, wherein the heat pump multi-split water system includes a water system and a heat pump system, the water system including at least water system piping and a water pump, and the device includes:

[0032] An acquisition module is used to acquire target parameters in the water system and the heat pump system, wherein the target parameters are parameters in the water system and the heat pump system that are associated with the water flow in the water system pipeline;

[0033] The detection module is used to detect the water flow in the water system pipeline according to the target parameters;

[0034] The control module is used to control the working status of the water pump based on the detection results.

[0035] Thirdly, an electronic device is characterized in that it includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus.

[0036] Memory, used to store computer programs;

[0037] When a processor executes a program stored in a memory, it implements the steps of the pump control method according to any one of the first aspects.

[0038] Fourthly, a computer-readable storage medium having a computer program stored thereon, characterized in that, when the computer program is executed by a processor, it implements the steps of the water pump control method according to any one of the first aspects.

[0039] Compared with the prior art, the technical solution provided in this application has the following advantages: The method provided in this application obtains target parameters in the water system and heat pump system, wherein the target parameters are parameters related to the water flow in the water system pipeline in the water system and heat pump system; the water flow in the water system pipeline is detected according to the target parameters; and the working state of the water pump is controlled according to the detection results. Through the above method, the target parameters in the water system and heat pump system can be used to detect the water flow in the water system pipeline, and then the working state of the water pump can be controlled according to the detection results. This avoids the misjudgment caused by using a flow switch to detect the water flow in the water system pipeline in the prior art, thereby improving the accuracy of detection and effectively solving the problem of water pump dry running. Attached Figure Description

[0040] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0043] Figure 1 A schematic flowchart of a water pump control method provided in an embodiment of this application;

[0044] Figure 2 This is a schematic diagram of the structure of a heat pump multi-split water system provided in an embodiment of this application;

[0045] Figure 3 A schematic flowchart illustrating another pump control method provided in this application embodiment;

[0046] Figure 4 This is a schematic diagram of the structure of a water pump control device provided in an embodiment of this application;

[0047] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0050] To address the problem of water pump dry running caused by misjudgment of water flow in the water system pipeline in existing water pump control methods, this application provides a water pump control method, device, electronic equipment, and storage medium that can effectively solve the problem of water pump dry running.

[0051] See Figure 1 , Figure 1 This is a schematic flowchart illustrating a water pump control method provided in an embodiment of this application. Figure 1 As shown, this water pump control method is applied to a heat pump multi-split water system. The heat pump multi-split water system includes a water system and a heat pump system. The water system includes at least water system piping and a water pump. The method may include the following steps:

[0052] Step 101: Obtain the target parameters in the water system and heat pump system, wherein the target parameters are the parameters in the water system and heat pump system that are related to the water flow in the water system pipeline.

[0053] It should be noted that this water pump control method can be applied to heat pump multi-split water systems. This heat pump multi-split water system can be a heat pump system with both hot water production and underfloor heating functions. For example, a combined refrigerant and water supply system on the market, or a water heater system with a water pump. This heat pump multi-split water system can include a water system and a heat pump system. The water system can include water system piping and a water pump, and can also include a water-side inlet pipe temperature sensor, a water-side outlet pipe temperature sensor, and a flow switch. The heat pump system can include a water-side heat exchanger, an indoor unit electronic expansion valve, an evaporator, an outdoor unit electronic expansion valve, a condenser, a fan, a compressor, four-way valve A and four-way valve B, and can also include a high-pressure sensor, a low-pressure sensor, an exhaust pipe temperature sensor, a steam separator outlet pipe temperature sensor, a condenser inlet temperature sensor, a condenser outlet temperature sensor, a defrost temperature sensor, and an outdoor ambient temperature sensor, etc. As an optional implementation, the structure of this heat pump multi-split water system is as follows: Figure 2 As shown.

[0054] Specifically, the aforementioned target parameters can be one or more parameters associated with the water flow in the water system pipeline in the water system and heat pump system, such as the temperature change rate of the refrigerant side pipeline, the high pressure value of the heat pump system, the temperature change rate of the water system pipeline, and the temperature value of the condenser pipeline, etc. This application embodiment does not make specific limitations.

[0055] Step 102: Detect the water flow in the water system pipeline according to the target parameters.

[0056] In this step, after obtaining the target parameters, the target parameters can be compared with the preset threshold to determine whether there is water flow in the water outlet system pipeline.

[0057] Step 103: Control the working status of the water pump based on the test results.

[0058] In this step, the operating status of the water pump can be controlled based on the detection results. Specifically, the water pump can be controlled to run when water flow is detected in the water system pipeline, and to stop when no water flow is detected in the water system pipeline.

[0059] In this embodiment, target parameters in the water system and heat pump system can be used to detect the water flow in the water system pipeline, and then the working state of the water pump can be controlled according to the detection results. This avoids the misjudgment caused by using a flow switch to detect the water flow in the water system pipeline in the prior art, thereby improving the accuracy of detection and effectively solving the problem of water pump dry running.

[0060] Furthermore, the heat pump system includes at least the refrigerant side piping, the high-pressure sensor, and the condenser piping;

[0061] Step 101 above, obtaining the target parameters in the water system and heat pump system, includes:

[0062] When a water demand is detected in the water system and the heat pump system has been started and running, the operating parameters of the water system and the heat pump system are acquired within a preset time period.

[0063] The target parameters are obtained from the operating parameters, wherein the target parameters include at least one of the following: the temperature change rate of the refrigerant side pipeline within a preset time period, the high pressure value detected by the high pressure sensor, the temperature change rate of the water system pipeline, and the temperature value of the condenser pipeline.

[0064] Specifically, the aforementioned water demand can be for underfloor heating operation (i.e., supplying hot or cold water to the underfloor heating system) or hot water production (i.e., supplying hot water for daily use). The preset duration can be set according to actual needs, such as 30 seconds, 1 minute, or 2 minutes.

[0065] In one embodiment, when obtaining the target parameters, it is necessary to first detect whether the water system has a water demand and whether the heat pump system has been started. When the water system has a water demand and the heat pump system has been started, the operating parameters of the water system and the heat pump system within a preset time period can be obtained, and then the target parameters can be obtained based on these operating parameters. For example, assuming that the preset time period refers to the time period between time t1 and time t2, then the temperature change rate of the refrigerant side pipeline = (temperature value of the refrigerant side pipeline measured at time t2 - temperature value of the refrigerant side pipeline measured at time t1) / (t2 - t1); the high pressure value = the high pressure value measured at time t2; the temperature change rate of the water system pipeline = (temperature value of the water system pipeline measured at time t2 - temperature value of the water system pipeline measured at time t1) / (t2 - t1); the temperature value of the condenser pipeline = the temperature value of the condenser pipeline measured at time t2.

[0066] The above methods allow for the acquisition of accurate target parameters, which can then be used to accurately determine whether there is water flow in the water system pipeline, thereby improving the accuracy of the judgment. Furthermore, by using the rate of temperature change at different pipeline locations as the target parameter to detect water flow in the water system pipeline, accurate judgments can be made even at low pipe temperatures. Therefore, compared to directly using pipe temperature as the target parameter, the judgment can be made earlier, thus preventing pump dry running as early as possible.

[0067] Furthermore, the target parameters include the rate of temperature change and the high pressure value of the fluorine-side piping;

[0068] Step 102 above involves detecting the water flow in the water system pipeline based on the target parameters, including:

[0069] The rate of temperature change of the fluorine side pipeline is compared with a first preset threshold, and the high pressure value is compared with a second preset threshold.

[0070] If the rate of temperature change in the fluorine-side pipeline is greater than the first preset threshold and the high pressure value is greater than the second preset threshold, it is determined that there is no water flow in the water system pipeline.

[0071] If the rate of temperature change in the fluorinated side pipeline is less than or equal to a first preset threshold, or the high pressure value is less than or equal to a second preset threshold, it is determined that there is water flow in the water system pipeline.

[0072] Specifically, the first preset threshold and the second preset threshold can be set according to the actual situation, and are not specifically limited in this embodiment.

[0073] It should be noted that because water has a relatively high specific heat capacity and can hold a large amount of heat, the temperature change rate of the refrigerant-side piping is smaller if there is water in the water system piping, and larger if there is no water in the water system piping. Therefore, the temperature change rate of the refrigerant-side piping can be used as a criterion for determining whether there is water flow. Additionally, the high pressure value in the heat pump system is also affected by the water flow in the water system piping. If there is water in the water system piping, the high pressure value in the heat pump system will remain within a specified range; if there is no water in the water system piping, the high pressure value in the heat pump system will exceed this specified range. Therefore, the high pressure value can also be used as a criterion for determining whether there is water flow in the water system piping.

[0074] In one embodiment, the temperature change rate and high pressure value of the fluorinated pipe can be used together to detect water flow in the water system pipeline. Specifically, the temperature change rate of the fluorinated pipe can be compared with a first preset threshold, and the high pressure value can be compared with a second preset threshold. When the temperature change rate of the fluorinated pipe is greater than the first preset threshold and the high pressure value is greater than the second preset threshold, it can be determined that there is no water flow in the water system pipeline; when the temperature change rate of the fluorinated pipe is less than or equal to the first preset threshold, or the high pressure value is less than or equal to the second preset threshold, it can be determined that there is water flow in the water system pipeline. This improves the accuracy of the water flow detection results in the water system pipeline.

[0075] Furthermore, the temperature change rate of the fluorine-side pipeline includes the temperature change rate of the fluorine-side inlet pipe and the temperature change rate of the fluorine-side outlet pipe.

[0076] The above steps, including comparing the rate of temperature change of the fluorine-side pipeline with a first preset threshold, include:

[0077] The temperature change rate of the fluorine side inlet pipe and the temperature change rate of the fluorine side outlet pipe are compared with the first preset threshold, respectively.

[0078] If both the rate of temperature change of the inlet pipe on the fluorine side and the rate of temperature change of the outlet pipe on the fluorine side are greater than the first preset threshold, it is determined that the rate of temperature change of the fluorine side pipeline is greater than the first preset threshold.

[0079] If the rate of temperature change of the fluorine-side inlet pipe and the rate of temperature change of the fluorine-side outlet pipe are both less than or equal to the first preset threshold, then the rate of temperature change of the fluorine-side pipeline is determined to be less than or equal to the first preset threshold.

[0080] In one embodiment, temperature sensors can be installed on the fluorine-side inlet and outlet pipes respectively to acquire the temperature change rates of the fluorine-side inlet and outlet pipes. These rates are then compared to a first preset threshold. If both rates are greater than the first preset threshold, the temperature change rate of the fluorine-side pipeline is determined to be greater than the first preset threshold; conversely, if both rates are less than or equal to the first preset threshold, the temperature change rate of the fluorine-side pipeline is determined to be less than or equal to the first preset threshold. This simultaneous detection of the temperature change rate of the fluorine-side pipeline using two temperature sensors effectively prevents misjudgments caused by the failure of one sensor, thereby improving detection accuracy.

[0081] Furthermore, before the above steps of comparing the temperature change rate of the fluorinated side pipeline with a first preset threshold and comparing the high pressure value with a second preset threshold, the method further includes:

[0082] Obtain the operating status of the heat pump system when a water demand is detected in the water system;

[0083] Based on the operating state of the heat pump system, a first preset threshold and a second preset threshold are determined, wherein the first preset threshold and the second preset threshold are different for different operating states of the heat pump system.

[0084] It should be noted that since the indoor unit and the hot water generator are in the same air conditioning system, the status of the indoor unit will affect the rate of temperature change of each pipe. Therefore, a first preset threshold and a second preset threshold can be set for each operating state of the heat pump system.

[0085] In one embodiment, before comparing the temperature change rate of the refrigerant-side pipeline with a first preset threshold and the high pressure value with a second preset threshold, the operating status of the heat pump system when water demand is detected can be obtained first. Then, based on the operating status of the heat pump system, the first and second preset thresholds for comparison are determined. This allows for flexible selection of appropriate first and second preset thresholds for comparison based on the operating status of the heat pump system, resulting in more accurate comparison results.

[0086] Furthermore, step 103 above, based on the test results, controls the operating status of the water pump, including:

[0087] If it is confirmed that there is water flow in the water system pipeline, control the water pump to be in operation;

[0088] If it is determined that there is no water flow in the water system pipeline, the water pump is controlled to be stopped.

[0089] In one embodiment, after obtaining the detection results, the operating state of the water pump can be controlled based on the detection results. Specifically, when it is determined that there is water flow in the water system pipeline, the water pump can be controlled to be in an operating state; when it is determined that there is no water flow in the water system pipeline, the water pump can be controlled to be in a stopped state. In this way, the problem of water pump dry running can be effectively solved.

[0090] Furthermore, the method also includes:

[0091] If it is determined that there is no water flow in the water system pipeline, a fault alarm will be output.

[0092] In one embodiment, when it is determined that there is no water flow in the water system pipeline, a fault alarm can also be output to promptly remind the user that there is no water in the water system pipeline, thereby facilitating timely maintenance by the user.

[0093] In one embodiment, the water pump control process provided in this application is as follows: Figure 3 As shown, the specific steps include the following:

[0094] Step 301: Water demand has been detected in the water system.

[0095] Step 302: The heat pump system starts up and runs continuously for t minutes.

[0096] Step 303: Determine whether the rate of temperature change of the fluorine side inlet pipe and the rate of temperature change of the fluorine side outlet pipe are greater than a, and whether the high pressure value is greater than b.

[0097] When the rate of change of temperature of the fluorine-side inlet pipe and the rate of change of temperature of the fluorine-side outlet pipe are both less than or equal to threshold a, or the high pressure value is less than or equal to threshold b, proceed to step 304; when the rate of change of temperature of the fluorine-side inlet pipe and the rate of change of temperature of the fluorine-side outlet pipe are both greater than a, and the high pressure value is greater than b, proceed to step 306.

[0098] Step 304: Confirm that there is water flow in the water system pipeline.

[0099] Step 305: Control the water pump to start running.

[0100] Step 306: Confirm that there is no water flow in the water system pipeline.

[0101] Step 307: Control the water pump to not start.

[0102] Step 308: Report a water shortage fault.

[0103] In other words, when the water system has a water demand (such as the demand for underfloor heating or hot water production), the heat pump system first starts operating (i.e., the compressor starts, the outdoor fan starts, the throttle valve opens, and the electronic expansion valve near the water-side heat exchanger is fully open). Then, after the heat pump system operates for a fixed output time t, the temperature change rate of the refrigerant inlet pipe and the temperature change rate of the refrigerant outlet pipe, as well as the high pressure value of the heat pump system, are calculated. If the temperature change rate of the refrigerant inlet pipe and the temperature change rate of the refrigerant outlet pipe are greater than the threshold value a, and the high pressure value of the heat pump system is higher than the threshold value b, then it is determined that there is no water in the pipe and the water pump cannot operate. If the temperature change rate of the refrigerant inlet pipe and the temperature change rate of the refrigerant outlet pipe are less than or equal to the threshold value a, or the high pressure value of the heat pump system is lower than the threshold value b, then it is determined that there is water in the pipe and the water pump starts operating.

[0104] It should be noted that different thresholds a and b can be set according to different operating states of the heat pump system. Specifically, this can include the following scenarios:

[0105] When the heat pump system is in a shutdown state and a water demand is detected in the water system, the heat pump system starts up. The temperatures detected by the refrigerant-side inlet and outlet temperature sensors, ta1 and tb1, are recorded before startup. During startup, the compressor and heat exchange fan operate at a fixed speed. The electronic expansion valve near the water-side heat exchanger is fully open, and the outdoor unit's electronic expansion valve is open, acting as a throttling valve. After running for t1 minutes, the temperatures detected by the refrigerant-side inlet and outlet temperature sensors, ta2 and tb2, are recorded, along with the system high-pressure value P1. The refrigerant-side inlet temperature change rate ka is calculated as ka = (ta2 - ta1) / t1, and the refrigerant-side outlet temperature change rate kb is calculated as kb = (tb2 - tb1) / t1. The temperature change rates ka and kb are compared with the first preset threshold a1, and the high-pressure value P1 is compared with the second preset threshold b1. The first and second preset thresholds a1 and b1 are obtained through experimental testing. Because when there is water in the pipe, the temperature change rate ka of the inlet pipe on the refrigerant side and the temperature change rate kb of the outlet pipe on the refrigerant side are relatively small, and the high pressure value P1 will be maintained within a certain value, so if ka > a1, kb > a1 and P1 > b1, it is determined that there is no water in the pipe and the water pump cannot run; if ka and kb ≤ a1, or P1 ≤ b1, it is determined that there is water in the pipe and the water pump can start running.

[0106] When the heat pump system is in heating operation and detects water demand in the water system, it records the temperatures tc1 and td1 detected by the inlet and outlet temperature sensors on the refrigerant side. The compressor and heat exchange fan operate at a fixed speed, the electronic expansion valve near the water-side heat exchanger is fully open, and the outdoor unit's electronic expansion valve is open, acting as a throttling valve. After running for t2 minutes, the system records the temperatures tc2 and td2 detected by the inlet and outlet temperature sensors on the refrigerant side, as well as the system high-pressure value P2. The rate of change of the refrigerant inlet temperature, kc, is calculated as kc = (tc2 - tc1) / t2, and the rate of change of the refrigerant outlet temperature, kd, is calculated as kd = (td2 - td1) / t2. The rates of change of pipe temperature, kc and kd, are compared with the heating rate threshold a2, and the high-pressure value P2 is compared with the second preset threshold b2. The first preset threshold a2 and the second preset threshold b2 are obtained through experimental testing. Because when there is water in the pipe, the temperature change rates kc and kd of the refrigerant inlet pipe and the refrigerant outlet pipe are relatively small, and the high pressure value P2 will remain within a certain range, if kc > a2, kd > a2, and P2 > b2, then it is determined that there is no water in the pipe and the water pump cannot run; if kc and kd ≤ a2, or P2 ≤ b2, then it is determined that there is water in the pipe and the water pump can start running.

[0107] When the heat pump system is in cooling operation and detects water demand in the water system, it records the temperatures te1 and tf1 detected by the inlet and outlet temperature sensors on the refrigerant side. The compressor and heat exchange fan operate at a fixed speed, the electronic expansion valve near the water-side heat exchanger is fully open, and the outdoor unit's electronic expansion valve is open, acting as a throttling valve. After running for t3 minutes, the system records the temperatures te2 and tf2 detected by the inlet and outlet temperature sensors on the refrigerant side, as well as the system high-pressure value P3. The rate of change of the refrigerant inlet temperature ke is calculated as ke = (te2 - te1) / t3, and the rate of change of the refrigerant outlet temperature kf is calculated as kf = (tf2 - tf1) / t3. The rates of change of pipe temperature ke and kf are compared with the heating rate threshold a3, and the high-pressure value P3 is compared with the second preset threshold b3. The first preset threshold a3 and the second preset threshold b3 are obtained through experimental testing. Because when there is water in the pipe, the temperature change rates ke and kf of the refrigerant side inlet pipe are relatively small, and the high pressure value P3 will remain within a certain range, if ke > a3, kf > a3, and P3 > b3, then it is determined that there is no water in the pipe and the water pump cannot run; if ke and kf ≤ a3, or P3 ≤ b3, then it is determined that there is water in the pipe and the water pump can start running.

[0108] This approach allows for the detection of water flow in the water system pipelines using target parameters from both the water system and the heat pump system. The pump's operating status can then be controlled based on the detection results, avoiding misjudgments caused by using flow switches to detect water flow in the water system pipelines in existing technologies. This improves detection accuracy and effectively solves the problem of pump dry running.

[0109] See Figure 4 , Figure 4 This is a schematic diagram of a water pump control device provided in an embodiment of this application. Figure 4 As shown, the water pump control device is applied to a heat pump multi-split water system. The heat pump multi-split water system includes a water system and a heat pump system. The water system includes at least water system piping and a water pump. The device 400 includes:

[0110] The first acquisition module 401 is used to acquire target parameters in the water system and heat pump system, wherein the target parameters are parameters in the water system and heat pump system that are related to the water flow in the water system pipeline;

[0111] The detection module 402 is used to detect the water flow in the water system pipeline according to the target parameters;

[0112] The control module 403 is used to control the working status of the water pump based on the detection results.

[0113] Furthermore, the heat pump system includes at least the refrigerant side piping, the high-pressure sensor, and the condenser piping;

[0114] The first acquisition module 401 includes:

[0115] The first acquisition submodule is used to acquire the operating parameters of the water system and the heat pump system within a preset time period when the water system is detected to have a water demand and the heat pump system has been started.

[0116] The second acquisition submodule is used to acquire target parameters from the operating parameters, wherein the target parameters include at least one of the following: the temperature change rate of the refrigerant side pipeline within a preset time period, the high pressure value detected by the high pressure sensor, the temperature change rate of the water system pipeline, and the temperature value of the condenser pipeline.

[0117] Furthermore, the target parameters include the rate of temperature change and the high pressure value of the fluorine-side piping;

[0118] Control module 403 includes:

[0119] The comparison submodule is used to compare the temperature change rate of the fluorine side pipeline with a first preset threshold and the high pressure value with a second preset threshold.

[0120] The first determining submodule is used to determine that there is no water flow in the water system pipeline when the temperature change rate of the fluorine side pipeline is greater than a first preset threshold and the high pressure value is greater than a second preset threshold.

[0121] The second determining submodule is used to determine that there is water flow in the water system pipeline when the temperature change rate of the fluorine side pipeline is less than or equal to a first preset threshold, or the high pressure value is less than or equal to a second preset threshold.

[0122] Furthermore, the temperature change rate of the fluorine-side pipeline includes the temperature change rate of the fluorine-side inlet pipe and the temperature change rate of the fluorine-side outlet pipe.

[0123] The comparison submodule includes:

[0124] The comparison unit is used to compare the rate of temperature change of the fluorine side inlet pipe and the rate of temperature change of the fluorine side outlet pipe with a first preset threshold, respectively.

[0125] The first determining unit is used to determine that the temperature change rate of the fluorine-side pipeline is greater than the first preset threshold when both the temperature change rate of the fluorine-side inlet pipe and the temperature change rate of the fluorine-side outlet pipe are greater than the first preset threshold.

[0126] The second determining unit is used to determine that the temperature change rate of the fluorine-side pipeline is less than or equal to the first preset threshold when both the temperature change rate of the fluorine-side inlet pipe and the temperature change rate of the fluorine-side outlet pipe are less than or equal to the first preset threshold.

[0127] Furthermore, the device 400 also includes:

[0128] The second acquisition module is used to acquire the operating status of the heat pump system when a water demand is detected in the water system.

[0129] The determining module is used to determine a first preset threshold and a second preset threshold based on the operating state of the heat pump system, wherein the first preset threshold and the second preset threshold are different for different operating states of the heat pump system.

[0130] Furthermore, the control module 403 includes:

[0131] The first control submodule is used to control the water pump to be in operation when it is determined that there is water flow in the water system pipeline;

[0132] The second control submodule is used to control the water pump to stop when it is determined that there is no water flow in the water system pipeline.

[0133] Furthermore, the device 400 also includes:

[0134] The output module is used to output a fault alarm when it is determined that there is no water flow in the water system pipeline.

[0135] It should be noted that the device 400 can implement the steps of the water pump control method provided in any of the aforementioned method embodiments and achieve the same technical effect, which will not be elaborated here.

[0136] like Figure 5 As shown in the illustration, this application also provides an electronic device, including a processor 511, a communication interface 512, a memory 513, and a communication bus 514, wherein the processor 511, the communication interface 512, and the memory 513 communicate with each other via the communication bus 514.

[0137] Memory 513 is used to store computer programs;

[0138] In one embodiment of this application, when the processor 511 executes the program stored in the memory 513, it implements the water pump control method provided in any of the foregoing method embodiments, including:

[0139] Obtain target parameters in the water system and heat pump system, where the target parameters are parameters in the water system and heat pump system that are related to the water flow in the water system pipeline;

[0140] The water flow in the water system pipeline is detected based on the target parameters;

[0141] Based on the test results, the operating status of the water pump is controlled.

[0142] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the water pump control method provided in any of the foregoing method embodiments.

[0143] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0144] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented using software plus a general-purpose hardware platform, or of course, using hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0145] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0146] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A water pump control method, characterized in that, Applied to a heat pump multi-split water system, the heat pump multi-split water system comprising a water system and a heat pump system, wherein the water system includes at least water system piping and a water pump, the method comprising: Obtain target parameters in the water system and the heat pump system, wherein the target parameters are parameters in the water system and the heat pump system that are associated with the water flow in the water system pipeline; The water flow in the water system pipeline is detected based on the target parameters. The operating status of the water pump is controlled based on the test results; The target parameters include the temperature change rate of the fluorine-side pipeline and the high pressure value detected by the high pressure sensor; The step of detecting the water flow in the water system pipeline based on the target parameters includes: The rate of temperature change of the fluorine-side pipeline is compared with a first preset threshold, and the high pressure value is compared with a second preset threshold. If the temperature change rate of the fluorine-side pipeline is greater than the first preset threshold and the high pressure value is greater than the second preset threshold, it is determined that there is no water flow in the water system pipeline. The temperature change rate of the fluorine-side pipeline includes the temperature change rate of the fluorine-side inlet pipe and the temperature change rate of the fluorine-side outlet pipe. The temperature change rate of the fluorine-side pipeline being greater than the first preset threshold means that both the temperature change rate of the fluorine-side inlet pipe and the temperature change rate of the fluorine-side outlet pipe are greater than the first preset threshold. If the rate of temperature change in the fluorine-side pipeline is less than or equal to the first preset threshold, and / or the high pressure value is less than or equal to the second preset threshold, it is determined that there is water flow in the water system pipeline. The rate of temperature change in the fluorine-side pipeline being less than or equal to the first preset threshold means that both the rate of temperature change in the fluorine-side inlet pipe and the rate of temperature change in the fluorine-side outlet pipe are less than or equal to the first preset threshold.

2. The method according to claim 1, characterized in that, The step of comparing the temperature change rate of the fluorine-side pipeline with a first preset threshold includes: The rate of temperature change of the fluorine-side inlet pipe and the rate of temperature change of the fluorine-side outlet pipe are compared with the first preset threshold, respectively. If both the rate of temperature change of the fluorine-side inlet pipe and the rate of temperature change of the fluorine-side outlet pipe are greater than the first preset threshold, it is determined that the rate of temperature change of the fluorine-side pipeline is greater than the first preset threshold. If both the rate of temperature change of the fluorine-side inlet pipe and the rate of temperature change of the fluorine-side outlet pipe are less than or equal to the first preset threshold, then the rate of temperature change of the fluorine-side pipeline is determined to be less than or equal to the first preset threshold.

3. The method according to claim 1, characterized in that, Before comparing the rate of temperature change of the fluorine-side pipeline with a first preset threshold and comparing the high pressure value with a second preset threshold, the method further includes: Obtain the operating status of the heat pump system when a water demand is detected in the water system; Based on the operating state of the heat pump system, the first preset threshold and the second preset threshold are determined, wherein the first preset threshold and the second preset threshold are different for different operating states of the heat pump system.

4. The method according to claim 1, wherein controlling the operating state of the water pump based on the detection results includes: If it is determined that there is water flow in the water system pipeline, the water pump is controlled to be in operation. If it is determined that there is no water flow in the water system pipeline, the water pump is controlled to be stopped.

5. The method according to claim 1, further comprising: If it is determined that there is no water flow in the water system pipeline, a fault alarm will be output.

6. A water pump control device, characterized in that, An application in a heat pump multi-split water system, wherein the heat pump multi-split water system includes a water system and a heat pump system, the water system including at least water system piping and a water pump, the device comprising: An acquisition module is used to acquire target parameters in the water system and the heat pump system, wherein the target parameters are parameters in the water system and the heat pump system that are associated with the water flow in the water system pipeline; The detection module is used to detect the water flow in the water system pipeline according to the target parameters; The control module is used to control the operating status of the water pump based on the detection results; The target parameters include the temperature change rate of the fluorine-side pipeline and the high pressure value detected by the high pressure sensor; the control module includes: The comparison submodule is used to compare the temperature change rate of the fluorine side pipeline with a first preset threshold, and to compare the high pressure value with a second preset threshold; The first determining submodule is used to determine that there is no water flow in the water system pipeline when the temperature change rate of the fluorine-side pipeline is greater than the first preset threshold and the high pressure value is greater than the second preset threshold. The temperature change rate of the fluorine-side pipeline includes the temperature change rate of the fluorine-side inlet pipe and the temperature change rate of the fluorine-side outlet pipe. The temperature change rate of the fluorine-side pipeline being greater than the first preset threshold means that both the temperature change rate of the fluorine-side inlet pipe and the temperature change rate of the fluorine-side outlet pipe are greater than the first preset threshold. The second determining submodule is used to determine that there is water flow in the water system pipeline when the temperature change rate of the fluorine-side pipeline is less than or equal to the first preset threshold and / or the high pressure value is less than or equal to the second preset threshold, wherein the temperature change rate of the fluorine-side pipeline is less than or equal to the first preset threshold means that the temperature change rate of the fluorine-side inlet pipe and the temperature change rate of the fluorine-side outlet pipe are both less than or equal to the first preset threshold.

7. An electronic device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; When a processor executes a program stored in a memory, it implements the steps of the water pump control method according to any one of claims 1-5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the water pump control method according to any one of claims 1-5.

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