Control method, device and equipment of distributed heating system and storage medium

Abstract

The application discloses a control method and device of a distributed heat supply system, equipment and a storage medium, and relates to the field of water heater control. In the application, the pipe pressure at both ends of a hot water supply pipe is detected, and when the pipe pressure appears a pressure drop, it indicates that a water consumption point in the current heat supply system has a user who needs to use hot water. The target water heater closest to the current water consumption point is determined according to the time when the pipe pressure at both ends appears a pressure drop. In this case, the target water heater is controlled to supply hot water to the hot water supply pipe, so that the hot water transmission distance is reduced as much as possible, heat loss is avoided, and energy utilization efficiency is improved while meeting the hot water consumption demand of the current water consumption position.

Description

Technical Field

[0001] This application relates to the field of water heater control, and more particularly to a control method, device, equipment and storage medium for a distributed heating system. Background Technology

[0002] Gas water heaters are common household appliances, offering the advantage of instant hot water supply without a tank. Currently, they are also used for heating in some public places, such as hospitals and hotels. A single gas water heater is usually insufficient to meet the hot water needs of these places, so the mainstream solution is to use multiple gas water heaters in a combined heating system. However, in traditional combined heating systems, the gas water heaters are usually located together and supply hot water to the main hot water supply pipe. This centralization inevitably results in some water usage points being far from the gas water heaters, leading to longer hot water transmission distances, excessive heat loss, and low energy efficiency. Summary of the Invention

[0003] The main objective of this application is to provide a control method, device, equipment, and storage medium for a distributed heating system, aiming to solve the technical problem that in traditional multi-gas water heater combined heating schemes, hot water needs to be transported over long distances, resulting in excessive heat loss and low energy utilization efficiency.

[0004] To achieve the above objectives, this application provides a control method for a distributed heating system. The distributed heating system includes multiple water heaters, a cold water supply pipeline, and a hot water supply pipeline. The installation locations of different water heaters are determined based on different water usage points. For any given water heater, its inlet is connected to the cold water supply pipeline, and its outlet is connected to the hot water supply pipeline. A first pressure sensor and a second pressure sensor are respectively installed at both ends of the hot water supply pipeline. Each water usage point is distributed on the pipeline between the first and second pressure sensors. The pressure sensors are used to collect the pipeline pressure at their respective locations. The control method for the distributed heating system includes the following steps:

[0005] Monitor the pressure changes of the first pressure sensor and the second pressure sensor;

[0006] The target water heater at the current water usage location is determined based on the first moment when the pressure drop occurs at the first pressure sensor and the second moment when the pressure drop occurs at the second pressure sensor.

[0007] Control the target water heater to operate and supply hot water to the hot water supply pipeline.

[0008] Optionally, the step of determining the target water heater at the current water usage location based on the first moment when the first pressure sensor shows a pressure drop and the second moment when the second pressure sensor shows a pressure drop includes:

[0009] Determine the first pressure drop point that causes the first pressure sensor to detect a pressure drop point and the second pressure sensor to detect a pressure drop point at the same water usage location;

[0010] The current water usage location is determined based on the time difference between the first moment when the first pressure drop point appears and the second moment when the second pressure drop point appears, the pipe length between the first pressure sensor and the second pressure sensor, and the preset pressure drop wave propagation speed.

[0011] The water heater closest to the current water usage location is selected as the target water heater.

[0012] Optionally, the step of determining the first pressure drop point caused by the same water usage location and the second pressure drop point caused by the first pressure sensor and the second pressure sensor includes:

[0013] After the first pressure drop point appears in the current water use stage, the reference sensor that first appeared at the pressure drop point determines whether a pressure drop point appears again within a preset time period after the first pressure sensor appears at the pressure drop point. If no new pressure drop point appears within the preset time period after the first pressure sensor appears at the pressure drop point, or if no new pressure drop point appears within the preset time period after the second pressure sensor appears at the pressure drop point, then a new water use stage is determined to be entered. The reference sensor is either the first pressure sensor or the second pressure sensor.

[0014] If a pressure drop point does not reappear, it is determined that the pressure drop point of the reference sensor and the pressure drop point of another sensor other than the reference sensor at the current water usage stage are caused by the same water usage location.

[0015] Optionally, after the step of determining whether the reference sensor that first appears at the voltage drop point will again appear at the voltage drop point within a preset time period after the first appearance at the voltage drop point, the method includes:

[0016] If a pressure drop point occurs again, record the first time set of each first pressure drop point and the second time set of each second pressure drop point under the current water use stage;

[0017] The number of water usage locations in the current water usage phase is determined based on the number of the first pressure drop points or the number of the second pressure drop points.

[0018] A set of voltage drop point combinations is generated based on each of the first voltage drop points and each of the second voltage drop points. For any voltage drop point group in the set of voltage drop point combinations, one voltage drop point of the voltage drop point group comes from each of the first voltage drop points, and the other voltage drop point of the voltage drop point group comes from each of the second voltage drop points.

[0019] For any group of voltage drop points, the time difference between two voltage drop points in the group of voltage drop points is determined based on the first time set and the second time set.

[0020] The alternative locations corresponding to the pressure drop point group are determined based on the time difference, pipeline length, and preset pressure drop wave propagation speed.

[0021] The position deviation is obtained by comparing the candidate location with the target standard water point location in the set of preset standard water point locations, wherein the target standard water point location is the standard water point location in the set of preset standard water point locations that is closest to the candidate location;

[0022] After determining the positional deviation of each pressure drop point group corresponding to the candidate positions, the pressure drop point group with the smaller positional deviation is selected as the target pressure drop point group. The two pressure drop points in the target pressure drop point group are determined to be caused by the same water use location. The number of target pressure drop point groups is determined based on the number of water use locations.

[0023] Optionally, after the step of controlling the target water heater to operate and supplying hot water to the hot water supply pipe, the method includes:

[0024] Monitor the operating flow rate of the target water heater;

[0025] When the working flow rate rises to a preset first flow rate threshold, the non-working water heaters adjacent to the target water heater on the water supply pipeline are added as new target water heaters, wherein the water supply pipeline is a hot water supply pipeline or a cold water supply pipeline.

[0026] Control the newly added target water heater to supply hot water to the hot water supply pipeline;

[0027] Based on the newly added target water heater, return to the step of monitoring the operating power of the target water heater.

[0028] Optionally, the step of controlling the target water heater to operate and supplying hot water to the hot water supply pipeline includes:

[0029] A working instruction is sent to the target water heater so that the target water heater performs a start-up self-test after receiving the working instruction, and after the start-up self-test is qualified, the heating component is activated to heat the water supply flowing through it. The start-up self-test includes at least checking the flow rate of the water supply at the inlet.

[0030] Optionally, after the step of controlling the target water heater to operate and supplying hot water to the hot water supply pipe, the method further includes:

[0031] For any working water heater, monitor the working flow rate of the working water heater;

[0032] If the working flow rate drops to a preset second flow rate threshold, the last working water heater in the local water heater cluster where the working water heater is located will be turned off. The local water heater cluster includes a main water heater and an auxiliary water heater. The main water heater is the water heater that is triggered to work based on the pressure value, and the auxiliary water heater is the water heater that is triggered to work based on the main water heater.

[0033] Furthermore, to achieve the above objectives, this application also provides a control device for a distributed heating system. The distributed heating system includes multiple water heaters, a cold water supply pipeline, and a hot water supply pipeline. The installation locations of different water heaters are determined based on different water usage points. For any given water heater, its inlet is connected to the cold water supply pipeline, and its outlet is connected to the hot water supply pipeline. A first pressure sensor and a second pressure sensor are respectively installed at both ends of the hot water supply pipeline. Each water usage point is distributed on the pipeline between the first and second pressure sensors. The pressure sensors are used to collect the pipeline pressure at their respective locations. The control method for the distributed heating system includes the following steps:

[0034] The monitoring module is used to monitor the pressure value changes of the first pressure sensor and the pressure value changes of the second pressure sensor;

[0035] The determination module is used to determine the target water heater at the current water usage location based on the first moment when the pressure drop of the first pressure sensor occurs and the second moment when the pressure drop of the second pressure sensor occurs;

[0036] The control module is used to control the operation of the target water heater and supply hot water to the hot water supply pipeline.

[0037] In addition, to achieve the above objectives, this application also provides an apparatus comprising: a memory, a processor, and a control program for a distributed heating system stored in the memory and executable on the processor, wherein the control program for the distributed heating system, when executed by the processor, implements the steps of the control method for the distributed heating system described above.

[0038] In addition, to achieve the above objectives, this application also provides a storage medium storing a control program for a distributed heating system, wherein the control program for the distributed heating system, when executed by a processor, implements the steps of the control method for the distributed heating system as described above.

[0039] This application discloses a control method, apparatus, device, and storage medium for a distributed heating system. In this embodiment, the distributed heating system includes multiple water heaters, a cold water supply pipeline, and a hot water supply pipeline. The installation locations of different water heaters are determined based on different water usage points. For any given water heater, its inlet is connected to the cold water supply pipeline, and its outlet is connected to the hot water supply pipeline. A first pressure sensor and a second pressure sensor are respectively installed at both ends of the hot water supply pipeline. Each water usage point is distributed along the pipeline between the first and second pressure sensors. The control method for the distributed heating system includes the following steps: monitoring the pressure changes of the first and second pressure sensors; determining the target water heater at the current water usage location based on the first and second moments when a pressure drop occurs in the first and second pressure sensors; and controlling the target water heater to supply hot water to the hot water supply pipeline. Compared to existing traditional heating solutions, the water heaters in this distributed heating system can be distributed across different locations within the heating area, avoiding centralized installation and reducing safety risks. Furthermore, this application monitors the pressure at both ends of the hot water supply pipeline. When a pressure drop occurs, it indicates that a user needs hot water at a current water usage point in the heating system. The system identifies the target water heater closest to the current water usage point based on the timing of pressure drops at both ends. In this case, the target water heater is controlled to supply hot water to the hot water supply pipeline, satisfying the hot water demand at the current location while minimizing the hot water transmission distance, preventing heat loss, and improving energy efficiency. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the device structure of the hardware operating environment involved in the embodiments of this application;

[0041] Figure 2 This is a flowchart illustrating the first embodiment of the control method for the distributed heating system of this application.

[0042] Figure 3 This is a schematic diagram of the distributed heating system in the control method of the distributed heating system of this application;

[0043] Figure 4 This is a schematic diagram illustrating the principle of determining the current water usage location in the control method of the distributed heating system of this application.

[0044] Figure 5 This is a flowchart illustrating the second embodiment of the control method for the distributed heating system of this application.

[0045] Figure 6 This is a flowchart illustrating the third embodiment of the control method for the distributed heating system of this application.

[0046] Figure 7 This is a flowchart illustrating the fourth embodiment of the control method for the distributed heating system of this application.

[0047] Figure 8 This is a schematic diagram of the control device for the distributed heating system of this application.

[0048] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0049] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0050] like Figure 1 As shown, Figure 1 This is a schematic diagram of the device structure of the hardware operating environment involved in the embodiments of this application.

[0051] The device in this application embodiment can be a server, or an electronic terminal device such as a smartphone, PC, tablet computer, or portable computer.

[0052] like Figure 1 As shown, the device may include: a processor 1001, such as a CPU; a network interface 1004; a user interface 1003; a memory 1005; and a communication bus 1002. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be high-speed RAM or non-volatile memory, such as a disk drive. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0053] Optionally, the device may also include a camera, RF (Radio Frequency) circuitry, sensors, audio circuitry, a WiFi module, etc. The terminal may also be equipped with other sensors such as a gyroscope, barometer, hygrometer, thermometer, and infrared sensor, which will not be elaborated upon here. Those skilled in the art will understand that... Figure 1The device structure shown does not constitute a limitation on the device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0054] Those skilled in the art will understand that Figure 1 The device structure shown does not constitute a limitation on the device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0055] In addition, such as Figure 1 As shown, the memory 1005, which serves as a computer storage medium, may include an operating system, a network communication module, a user interface module, and a control program for a distributed heating system.

[0056] exist Figure 1 In the device shown, network interface 1004 is mainly used to connect to the backend server and communicate with it; user interface 1003 is mainly used to connect to the user terminal (user end) and communicate with it; and processor 1001 can be used to call the control program of the distributed heating system stored in memory 1005. The distributed heating system includes multiple water heaters, cold water supply pipelines, and hot water supply pipelines. The installation positions of different water heaters are determined based on different water usage points. For any water heater, the inlet of the water heater is connected to the cold water supply pipeline, and the outlet of the water heater is connected to the hot water supply pipeline. A first pressure sensor and a second pressure sensor are respectively installed at both ends of the hot water supply pipeline. Each water usage point is distributed on the pipeline between the first pressure sensor and the second pressure sensor. The pressure sensor is used to collect the pipeline pressure at its location, and processor 1001 calls the control program of the distributed heating system to perform the following operations:

[0057] Monitor the pressure changes of the first pressure sensor and the second pressure sensor;

[0058] The target water heater at the current water usage location is determined based on the first moment when the pressure drop occurs at the first pressure sensor and the second moment when the pressure drop occurs at the second pressure sensor.

[0059] Control the target water heater to operate and supply hot water to the hot water supply pipeline.

[0060] In one feasible implementation, the processor 1001 may call the control program of the distributed heating system stored in the memory 1005, and further perform the following operations:

[0061] The step of determining the target water heater at the current water usage location based on the first moment when the pressure drop occurs in the first pressure sensor and the second moment when the pressure drop occurs in the second pressure sensor includes:

[0062] Determine the first pressure drop point that causes the first pressure sensor to detect a pressure drop point and the second pressure sensor to detect a pressure drop point at the same water usage location;

[0063] The current water usage location is determined based on the time difference between the first moment when the first pressure drop point appears and the second moment when the second pressure drop point appears, the pipe length between the first pressure sensor and the second pressure sensor, and the preset pressure drop wave propagation speed.

[0064] The water heater closest to the current water usage location is selected as the target water heater.

[0065] In one feasible implementation, the processor 1001 may call the control program of the distributed heating system stored in the memory 1005, and further perform the following operations:

[0066] The step of determining the first pressure drop point that causes the first pressure sensor to detect a pressure drop point and the second pressure sensor to detect a pressure drop point at the same water usage location includes:

[0067] After the first pressure drop point appears in the current water use stage, the reference sensor that first appeared at the pressure drop point determines whether a pressure drop point appears again within a preset time period after the first pressure sensor appears at the pressure drop point. If no new pressure drop point appears within the preset time period after the first pressure sensor appears at the pressure drop point, or if no new pressure drop point appears within the preset time period after the second pressure sensor appears at the pressure drop point, then a new water use stage is determined to be entered. The reference sensor is either the first pressure sensor or the second pressure sensor.

[0068] If a pressure drop point does not reappear, it is determined that the pressure drop point of the reference sensor and the pressure drop point of another sensor other than the reference sensor at the current water usage stage are caused by the same water usage location.

[0069] In one feasible implementation, the processor 1001 may call the control program of the distributed heating system stored in the memory 1005, and further perform the following operations:

[0070] After the step of determining whether the reference sensor that first detected the voltage drop point will detect another voltage drop point within a preset time period after the first voltage drop point, the method includes:

[0071] If a pressure drop point occurs again, record the first time set of each first pressure drop point and the second time set of each second pressure drop point under the current water use stage;

[0072] The number of water usage locations in the current water usage phase is determined based on the number of the first pressure drop points or the number of the second pressure drop points.

[0073] A set of voltage drop point combinations is generated based on each of the first voltage drop points and each of the second voltage drop points. For any voltage drop point group in the set of voltage drop point combinations, one voltage drop point of the voltage drop point group comes from each of the first voltage drop points, and the other voltage drop point of the voltage drop point group comes from each of the second voltage drop points.

[0074] For any group of voltage drop points, the time difference between two voltage drop points in the group of voltage drop points is determined based on the first time set and the second time set.

[0075] The alternative locations corresponding to the pressure drop point group are determined based on the time difference, pipeline length, and preset pressure drop wave propagation speed.

[0076] The position deviation is obtained by comparing the candidate location with the target standard water point location in the set of preset standard water point locations, wherein the target standard water point location is the standard water point location in the set of preset standard water point locations that is closest to the candidate location;

[0077] After determining the positional deviation of each pressure drop point group corresponding to the candidate positions, the pressure drop point group with the smaller positional deviation is selected as the target pressure drop point group. The two pressure drop points in the target pressure drop point group are determined to be caused by the same water use location. The number of target pressure drop point groups is determined based on the number of water use locations.

[0078] In one feasible implementation, the processor 1001 may call the control program of the distributed heating system stored in the memory 1005, and further perform the following operations:

[0079] After the step of controlling the target water heater to operate and supplying hot water to the hot water supply pipe, the method includes:

[0080] Monitor the operating flow rate of the target water heater;

[0081] When the working flow rate rises to a preset first flow rate threshold, the non-working water heaters adjacent to the target water heater on the water supply pipeline are added as new target water heaters, wherein the water supply pipeline is a hot water supply pipeline or a cold water supply pipeline.

[0082] Control the newly added target water heater to supply hot water to the hot water supply pipeline;

[0083] Based on the newly added target water heater, return to the step of monitoring the operating power of the target water heater.

[0084] In one feasible implementation, the processor 1001 may call the control program of the distributed heating system stored in the memory 1005, and further perform the following operations:

[0085] The steps of controlling the target water heater to operate and supplying hot water to the hot water supply pipeline include:

[0086] A working instruction is sent to the target water heater so that the target water heater performs a start-up self-test after receiving the working instruction, and after the start-up self-test is qualified, the heating component is activated to heat the water supply flowing through it. The start-up self-test includes at least checking the flow rate of the water supply at the inlet.

[0087] In one feasible implementation, the processor 1001 may call the control program of the distributed heating system stored in the memory 1005, and further perform the following operations:

[0088] After the step of controlling the target water heater to operate and supplying hot water to the hot water supply pipe, the method further includes:

[0089] For any working water heater, monitor the working flow rate of the working water heater;

[0090] If the working flow rate drops to a preset second flow rate threshold, the last working water heater in the local water heater cluster where the working water heater is located will be turned off. The local water heater cluster includes a main water heater and an auxiliary water heater. The main water heater is the water heater that is triggered to work based on the pressure value, and the auxiliary water heater is the water heater that is triggered to work based on the main water heater.

[0091] Reference Figure 2 The first embodiment of the control method for the distributed heating system of this application includes multiple water heaters, a cold water supply pipeline, and a hot water supply pipeline. The installation positions of different water heaters are determined based on different water usage points. For any water heater, the inlet of the water heater is connected to the cold water supply pipeline, and the outlet of the water heater is connected to the hot water supply pipeline. A first pressure sensor and a second pressure sensor are respectively installed at both ends of the hot water supply pipeline. Each water usage point is distributed on the pipeline between the first pressure sensor and the second pressure sensor. The pressure sensor is used to collect the pipeline pressure at its location.

[0092] It should be noted that, referring to Figure 3 This is a schematic diagram of the distributed heating system in this application. The distributed heating system includes multiple water heaters, such as water heater 1 to water heater N. The solid lines in the diagram represent cold water supply pipes, and the dashed lines represent cold water supply lines. The inlet of each water heater is connected to the cold water supply pipe, and the outlet of each water heater is connected to the hot water supply pipe. When the water heater is working, it heats the cold water flowing into it from the cold water supply pipe into hot water, which then enters the hot water supply pipe through its outlet. A first pressure sensor and a second pressure sensor are respectively installed at both ends of the hot water supply pipe, for example... Figure 3The system includes sensor a or sensor b, where the pressure sensor is used to collect the pipe pressure at its location. Furthermore, the installation location of different water heaters can be determined based on the location of different water usage points; for example, the water heater can be installed near the water usage point based on the principle of proximity.

[0093] The control method for the distributed heating system includes the following steps:

[0094] Step S10: Monitor the pressure value changes of the first pressure sensor and the pressure value changes of the second pressure sensor;

[0095] It should be noted that in this embodiment, the water heater in the distributed heating system can be a gas water heater. For gas-fired scenarios, due to safety considerations, gas water heaters have certain restrictions on installation conditions. For example, gas water heaters are typically installed in non-residential spaces. Therefore, it is not easy to install gas water heaters near some water usage points, for example... Figure 3 As shown, no water heater is installed near water point 4. The specific number of water heaters can be determined based on the hot water demand. For example, the maximum hot water supply demand of Building 1 of a hospital is 33,394 L per hour. In this embodiment, the set load of the water heater is 23 L / min, which means 25 units are needed. To ensure the stable operation of the system, 3 more units can be configured as backups. Therefore, the total distributed heating system for Building 1 of the hospital may include 28 water heaters.

[0096] Furthermore, the implementing entity of the above method can be a server that communicates with each water heater. Each water heater can be equipped with a WiFi (Wireless Fidelity) module to achieve network communication connection with the server. The pressure signal (i.e., pressure value) of each pressure sensor can also be connected to a nearby water heater based on the principle of proximity. With the communication connection between the water heater and the server, the pressure signal can be transmitted from the pressure sensor to the server. The server monitors the changes in the pressure value of each pressure sensor, mainly monitoring whether the pressure value drops. It should be noted that when the user opens the hot water valve at the water point, the medium in the hot water supply pipe will flow out of the hot water valve. Based on the characteristics of fluid medium flowing in the pipe, the density of the medium will decrease here, and correspondingly, the pressure will decrease here, i.e., pressure drop. This pressure drop phenomenon will be transmitted upstream and downstream of the hot water valve along the pipe. In this implementation, this is also referred to as a negative pressure wave or pressure drop wave. When the pressure drop wave reaches the first and second pressure sensors at both ends of the hot water supply pipe, it will cause changes in the pressure values ​​collected by the first and second pressure sensors.

[0097] Step S20: Determine the target water heater at the current water usage location based on the first moment when the pressure drop occurs at the first pressure sensor and the second moment when the pressure drop occurs at the second pressure sensor;

[0098] For example, if the hot water valve at a certain point of use on the hot water supply pipeline between the first and second pressure sensors is opened, a pressure drop wave will be generated at that valve location and propagate to both ends of the pipeline. When the wave reaches the location of the first pressure sensor, a pressure drop will occur in the pressure value of the first pressure sensor, and the first moment of the pressure drop will be recorded. When the wave reaches the location of the second pressure sensor, a pressure drop will occur in the pressure value of the second pressure sensor, and the second moment of the pressure drop will be recorded. Since the speed at which the pressure drop wave propagates to both ends of the pipeline is constant, the location where the negative pressure wave is generated, i.e., the current water usage location, can be determined based on the time difference between the first and second moments. The water heater closest to the current water usage location is then selected as the target water heater. It is understood that selecting a target water heater closest to the current water usage location reduces the transmission distance of the hot water output from the water heater to the current water usage location, thereby avoiding excessive heat loss during transmission.

[0099] In one feasible implementation, the step of determining the target water heater at the current water usage location based on the first moment when the first pressure sensor shows a pressure drop and the second moment when the second pressure sensor shows a pressure drop includes:

[0100] Step S210: Determine the first pressure drop point that causes the first pressure sensor to detect pressure drop at the same water usage location and the second pressure sensor to detect pressure drop.

[0101] Step S220: Determine the current water usage location based on the time difference between the first moment when the first pressure drop point appears and the second moment when the second pressure drop point appears, the pipe length between the first pressure sensor and the second pressure sensor, and the preset pressure drop wave propagation speed.

[0102] Step S230: Select the water heater closest to the current water usage location as the target water heater.

[0103] It should be noted that, due to the relatively fast propagation speed of the pressure drop wave, in most cases, if the times when the first pressure drop point appears and the times when the second pressure drop point appears are close (e.g., the time difference between the two is less than a preset threshold), then it is considered that the first and second pressure drop points are caused by the user using water at the same water location (where a pressure drop point refers to the point where the pressure decreases; for example, after the server receives data collected by the pressure sensor, it is usually represented in the form of a pressure curve, that is, the pressure curve represents the change of pressure over time, and correspondingly, the pressure drop point is the point in the pressure curve where the pressure begins to decrease). The current water usage location is then determined based on the time difference between the first and second times when the first pressure drop point appears, the pipe length between the first and second pressure sensors, and the preset pressure drop wave propagation speed. The formula for calculating the current water usage location is as follows:

[0104] L=(L 总 +△t˙a) / 2

[0105] In the formula, Δt is the time difference (first moment - second moment), L 总 Let be the pipe length between the first and second pressure sensors, 'a' be the preset pressure drop wave propagation speed, and 'L' be the distance between the current water usage location and the first pressure sensor. Alternatively, the above calculation formula can also be L = (L... 总 +△t˙(av)) / 2, where v can be the flow velocity of the medium in the pipe. Since a is usually large, v can be ignored. It is understood that the position of the first pressure sensor is fixed; therefore, given the distance between the current water usage location and the first pressure sensor, the current water usage location can be determined.

[0106] For example, refer to Figure 4 This is a schematic diagram illustrating the principle of determining the current water usage location in this application. The diagram includes sensor a (first pressure sensor), sensor b (second pressure sensor), and the current water usage location c. When a user uses water at location c, a pressure drop wave is generated, which is transmitted to both sensor a and sensor b. The distance between sensor a and the current water usage location c is L, and the distance between sensor b and the current water usage location c is L. 总 -L. Furthermore, if the time it takes for the voltage drop wave to propagate to sensor a is t1, then t1 is calculated as follows:

[0107] t1 = L / (av)

[0108] The time it takes for the voltage drop wave to travel to sensor b is t2. Therefore, t2 is calculated as follows:

[0109] t2=L 总 -L / (a+v)

[0110] The difference between t1 and t2 is Δt, that is, Δt = t1 - t2.

[0111] In addition, those skilled in the art can adjust the above calculation formula to obtain other forms of calculation methods, which will not be elaborated here.

[0112] In one feasible implementation, the step of determining the first pressure drop point at which the first pressure sensor detects a pressure drop point and the second pressure sensor detect a pressure drop point at the same water usage location includes:

[0113] Step S211: After the first pressure drop point appears in the current water use stage, determine whether the reference sensor that first appeared at the pressure drop point will appear at the pressure drop point again within a preset time period after the first pressure drop point appears. If no new pressure drop point appears within the preset time period after the first pressure sensor produces the pressure drop point, or if no new pressure drop point appears within the preset time period after the second pressure sensor produces the pressure drop point, then it is determined that a new water use stage has begun. The reference sensor is either the first pressure sensor or the second pressure sensor.

[0114] Step S212: If a pressure drop point does not reappear, it is determined that the pressure drop point of the reference sensor and the pressure drop point of another sensor other than the reference sensor at the current water usage stage are caused by the same water usage location.

[0115] It should be noted that, under normal circumstances, each time a user opens the hot water valve, the resulting pressure drop wave in the pipe causes a pressure drop point to appear in both the first and second pressure sensors. Since the distance between the first and second pressure sensors is fixed, the difference between the times the first and second pressure drop points occur at the same water usage location will not exceed a preset time. For example, the time it takes for the pressure drop wave to travel from the first to the second pressure sensor can be considered the preset time. However, in practice, the preset time is shorter than the actual transmission time of the pressure drop wave between the first and second pressure sensors.

[0116] In this embodiment, the water usage stage is determined based on the aforementioned preset time period. For example, if no new pressure drop point appears within the preset time period after the first pressure sensor generates a pressure drop point, it can be considered that a new water usage stage has begun. Alternatively, if no new pressure drop point appears within the preset time period after the second pressure sensor generates a pressure drop point, it can be considered that a new water usage stage has begun.

[0117] For example, after a pressure drop point first appears during the current water usage phase, a reference sensor is used to determine whether a pressure drop point reappears within a preset time period after the first appearance of the pressure drop point. The reference sensor can be either a first pressure sensor or a second pressure sensor. It should be noted that if multiple water outlets simultaneously open their hot water valves, or if the opening times of multiple water outlets are relatively close, it may cause the reference sensor to determine whether a pressure drop point reappears within the preset time period after the first appearance of the pressure drop point, but the probability of this occurring is low.

[0118] If the pressure drop point does not reappear, it means that the reference sensor only has one pressure drop point in the current water usage phase. Under normal circumstances, the other sensor among the first and second pressure sensors, excluding the reference sensor, will also have a pressure drop point within a preset time after the reference sensor first has a pressure drop point. Therefore, the pressure drop point of the reference sensor and the pressure drop point of the other sensor in the current water usage phase are directly regarded as caused by the same water usage location.

[0119] In one feasible implementation, after the step of determining whether the reference sensor that first detected the voltage drop point will detect another voltage drop point within a preset time period after the first voltage drop point, the method includes:

[0120] Step S213: If a pressure drop point occurs again, record the first time set of each first pressure drop point and the second time set of each second pressure drop point under the current water use stage.

[0121] Step S214: Determine the number of water usage locations in the current water usage phase based on the number of the first pressure drop points or the number of the second pressure drop points;

[0122] Step S215: Generate a set of voltage drop point combinations based on each of the first voltage drop points and each of the second voltage drop points, wherein, for any voltage drop point group in the set of voltage drop point combinations, one voltage drop point of the voltage drop point group comes from each of the first voltage drop points, and the other voltage drop point of the voltage drop point group comes from each of the second voltage drop points.

[0123] Step S216: For any group of voltage drop points, determine the time difference between two voltage drop points in the group of voltage drop points based on the first time set and the second time set;

[0124] Step S217: Determine the alternative locations corresponding to the pressure drop point group based on the time difference, pipeline length, and preset pressure drop wave propagation speed.

[0125] Step S218: Compare the candidate location with the target standard water point location in the preset standard water point location set to obtain the location deviation, wherein the target standard water point location is the standard water point location in the preset standard water point location set that is closest to the candidate location.

[0126] Step S219: After determining the positional deviation of each pressure drop point group corresponding to the candidate position, the pressure drop point group with the smaller positional deviation is selected as the target pressure drop point group. The two pressure drop points in the target pressure drop point group are determined to be caused by the same water use location. The number of target pressure drop point groups is determined based on the number of water use locations.

[0127] It should be noted that if a pressure drop point reappears, it indicates that multiple users are using hot water in a concentrated manner, making the determination of the second pressure drop point corresponding to each first pressure drop point more complex. Record the first time set of occurrences of each first pressure drop point under the current water usage phase, and record the second time set of occurrences of each second pressure drop point under the current water usage phase. Determine the number of water usage locations under the current water usage phase based on the number of first or second pressure drop points. For example, directly use the number of first or second pressure drop points as the number of water usage locations under the current water usage phase. Then, combine each first and second pressure drop point to generate a pressure drop point combination set. Any pressure drop point combination set contains two pressure drop points: one from each of the first pressure drop points and the other from each of the second pressure drop points. For example, each first pressure drop point includes first pressure drop point A and first pressure drop point B, and each second pressure drop point includes second pressure drop point A and second pressure drop point B. Therefore, the pressure drop point groups can be: first pressure drop point A and second pressure drop point A, first pressure drop point A and second pressure drop point B, first pressure drop point B and second pressure drop point A, and first pressure drop point B and second pressure drop point B. Then, based on each pressure drop point group, the water usage location (i.e., the aforementioned candidate locations; the candidate locations may be accurate or inaccurate) is calculated. For example, for any pressure drop group, the time difference between two pressure drop points in the group is determined based on the first and second time sets. Then, based on the pipeline length and the preset pressure drop wave propagation speed, the corresponding candidate location is determined. The specific calculation process is not detailed here but can be found above. The obtained candidate locations are then compared with the target standard water point locations in the preset standard water point location set to obtain the location deviation. The standard water point locations in the preset standard water point location set are set based on actual water usage points, while the target standard water point location is the standard water point location closest to the candidate location. After determining the location deviation of the candidate locations for each pressure drop point group, the pressure drop point group with the smaller location deviation is selected as the target pressure drop point group. For example, if the location deviations are arranged in ascending order as location deviation 1, location deviation 2, location deviation 3, and location deviation 4, and the number of determined water usage locations is 2, then the pressure drop point group corresponding to location deviation 1 and the pressure drop point group corresponding to location deviation 2 are selected as the target pressure drop point group, that is, the two pressure drop points in the target pressure drop point group are considered to be caused by the same water usage location.

[0128] Step S30: Control the target water heater to operate and supply hot water to the hot water supply pipeline.

[0129] For example, controlling the target water heater to work can be achieved by the server sending a working instruction to the target water heater, causing the target water heater to ignite and supply hot water to the hot water supply pipe.

[0130] In one feasible implementation, the step of controlling the target water heater to operate and supplying hot water to the hot water supply pipeline includes:

[0131] Step S31: Send a working instruction to the target water heater so that the target water heater performs a start-up self-test after receiving the working instruction, and starts the heating component to heat the flowing water after the start-up self-test is qualified. The start-up self-test includes at least checking the flow rate of the water supply at the inlet.

[0132] For example, after identifying the target water heater, a working instruction is sent to it. Upon receiving the instruction, the target water heater initiates a self-test (i.e., it starts the heating module to perform a pre-heating check, such as a safety check before igniting the gas). If the self-test passes, the target water heater starts the heating module and begins heating. The self-test includes at least checking the water flow rate at its inlet. For example, it detects the inlet flow rate to determine if it exceeds a preset flow threshold.

[0133] In this embodiment, the distributed heating system includes multiple water heaters, a cold water supply pipeline, and a hot water supply pipeline. The installation locations of different water heaters are determined based on different water usage points. For any given water heater, its inlet is connected to the cold water supply pipeline, and its outlet is connected to the hot water supply pipeline. A first pressure sensor and a second pressure sensor are respectively installed at both ends of the hot water supply pipeline. Each water usage point is distributed along the pipeline between the first and second pressure sensors. The control method of the distributed heating system includes the following steps: monitoring the pressure changes of the first and second pressure sensors; determining the target water heater at the current water usage location based on the first and second moments when a pressure drop occurs in the first and second pressure sensors; and controlling the target water heater to supply hot water to the hot water supply pipeline. Compared to existing traditional heating solutions, the water heaters in this distributed heating system can be distributed in different locations within the heating area, avoiding centralized installation of water heaters and reducing safety risks. Furthermore, this application detects the pressure at both ends of the hot water supply pipeline. When a pressure drop occurs, it indicates that a user in the current heating system needs hot water. The target water heater closest to the current user is determined based on the timing of the pressure drop at both ends. In this case, the target water heater is controlled to supply hot water to the hot water supply pipeline, satisfying the hot water demand at the current user location while minimizing the hot water transmission distance, avoiding heat loss, and improving energy efficiency.

[0134] Reference Figure 5This is a second embodiment based on the first embodiment of this application. The parts identical to those in the previous embodiment can be referred to the above content, and will not be repeated here. After the step of controlling the target water heater to operate and supplying hot water to the hot water supply pipeline, the method includes:

[0135] Step A10: Monitor the operating flow rate of the target water heater;

[0136] Step A20: When the working flow rate rises to a preset first flow rate threshold, the non-working water heaters adjacent to the target water heater on the water supply pipeline are added as new target water heaters, wherein the water supply pipeline is a hot water supply pipeline or a cold water supply pipeline.

[0137] Step A30: Control the newly added target water heater to supply hot water to the hot water supply pipeline;

[0138] Step A40: Based on the newly added target water heater, return to the step of monitoring the operating power of the target water heater.

[0139] For example, in this embodiment, the server will also monitor the operating flow rate of the target water heater, i.e., the working load of the target water heater. The aforementioned first flow rate threshold can be the rated load or maximum load of a single water heater. When the operating flow rate of the target water heater rises to the preset first flow rate threshold, it indicates that the output hot water flow rate of the currently operating water heater may not meet the current user's hot water demand, so it is necessary to increase the number of operating water heaters. Similarly, to minimize the distance of hot water transmission, the non-operating water heaters adjacent to the target water heater on the water supply pipeline are designated as new target water heaters. It is understood that the newly added target water heaters will also be controlled to start working, supplying hot water to the hot water supply pipeline, thereby increasing the hot water output to meet the user's needs. Similarly, based on the newly added target water heaters, the step of monitoring the operating power of the target water heater is returned to execute, thereby realizing the adjustment of the number of operating water heaters based on the user's hot water demand and dynamically adjusting the hot water output flow rate.

[0140] Reference Figure 6 This is a third embodiment based on the first and second embodiments of this application. The parts identical to those in the above embodiments can be referred to the above content, and will not be repeated here. After the step of controlling the target water heater to operate and supplying hot water to the hot water supply pipeline, the method further includes:

[0141] Step B10: For any working water heater that supplies hot water to the hot water supply pipeline, if the working water heater malfunctions, determine the type of the adjacent water heaters of the working water heater, wherein the type includes non-working water heaters and working water heaters;

[0142] Step B20: If the adjacent water heater is not working, then the adjacent water heater is designated as the new target water heater, and the new target water heater is controlled to work and supply hot water to the hot water supply pipeline.

[0143] Step B30: If the adjacent water heater is a working water heater, then the adjacent water heater is designated as the new working water heater, and the process returns to the step of determining the type of the adjacent water heater of the working water heater based on the new working water heater.

[0144] For example, when any of the hot water heaters supplying hot water in the hot water supply line malfunctions, a replacement water heater (the new target water heater) needs to be selected. The malfunction could be due to gas failure, for example, if the water heater cannot detect a flame, it will disconnect the gas supply and stop working. The type of the adjacent water heaters of the malfunctioning water heater is determined, including non-working and working water heaters. If the adjacent water heater is non-working, it is designated as the new target water heater, and the new target water heater is controlled to supply hot water to the hot water supply line. Conversely, if the adjacent water heater is working, it is designated as the new working water heater, and based on this new working water heater, the steps for selecting the type of adjacent water heater of the working water heater are returned, i.e., further searching for a replacement water heater for the malfunctioning water heater.

[0145] Reference Figure 7 This is a third embodiment of the present application, based on the first, second, and third embodiments. The parts identical to those in the above embodiments can be referred to the above content, and will not be repeated here.

[0146] Step C10: For any working water heater, monitor the working flow rate of the working water heater;

[0147] Step C20: If the working flow rate drops to a preset second flow rate threshold, then the last working water heater in the local water heater cluster where the working water heater is located is turned off. The local water heater cluster includes a main water heater and an auxiliary water heater. The main water heater is the water heater that is triggered to work based on the pressure value, and the auxiliary water heater is the water heater that is triggered to work based on the main water heater.

[0148] For example, the server monitors the flow rate of each working water heater. If the flow rate of any working water heater drops to a preset second flow rate threshold, it indicates that the user's hot water demand is low, and therefore the number of working water heaters can be reduced. The last working water heater in the local water heater cluster to start operating is turned off. The local water heater cluster includes main water heaters and auxiliary water heaters. The main water heater is the one that starts operating based on a pressure value, and the auxiliary water heaters are those that start operating based on the main water heater. For example, refer to... Figure 3 If a user opens the hot water valve at water point 3, a negative pressure wave will be generated in the hot water supply pipeline. At this time, the pressure sensor near water heater 3 will collect a relatively large pressure fluctuation value. Therefore, water heater 3 will be selected as the target water heater. Furthermore, if the workload of water heater 3 continues to increase and reaches a preset first flow threshold, the operation of water heaters near water heater 3 will be further controlled, such as water heater 2 and / or water heater 4. It can be understood that water heaters 2, 3, and 4 form a local water heater cluster. Water heater 3 is triggered based on the pressure value of the pressure sensor, so water heater 3 is the main water heater, while water heaters 2 and 4 are triggered based on their positional relationship with water heater 3, so water heaters 2 and 4 are auxiliary water heaters. If water heater 4 is the last water heater controlled to be turned on in the local water heater cluster of water heaters 2, 3, and 4, then water heater 4 will be turned off to meet the user's hot water demand.

[0149] In addition, to achieve the above objectives, refer to Figure 8 This application also provides a control device 100 for a distributed heating system. The distributed heating system includes multiple water heaters, a cold water supply pipeline, and a hot water supply pipeline. The installation locations of different water heaters are determined based on different water usage points. For any water heater, the inlet of the water heater is connected to the cold water supply pipeline, and the outlet of the water heater is connected to the hot water supply pipeline. A first pressure sensor and a second pressure sensor are respectively installed at both ends of the hot water supply pipeline. Each water usage point is distributed on the pipeline between the first pressure sensor and the second pressure sensor. The pressure sensor is used to collect the pipeline pressure at its location. The control device 100 for the distributed heating system includes:

[0150] Monitoring module 10 is used to monitor the pressure value changes of the first pressure sensor and the pressure value changes of the second pressure sensor;

[0151] The determination module 20 is used to determine the target water heater at the current water usage location based on the first moment when the pressure drop of the first pressure sensor occurs and the second moment when the pressure drop of the second pressure sensor occurs.

[0152] The control module 30 is used to control the operation of the target water heater and supply hot water to the hot water supply pipeline.

[0153] Optionally, the determining module 20 is further configured to:

[0154] Determine the first pressure drop point that causes the first pressure sensor to detect a pressure drop point and the second pressure sensor to detect a pressure drop point at the same water usage location;

[0155] The current water usage location is determined based on the time difference between the first moment when the first pressure drop point appears and the second moment when the second pressure drop point appears, the pipe length between the first pressure sensor and the second pressure sensor, and the preset pressure drop wave propagation speed.

[0156] The water heater closest to the current water usage location is selected as the target water heater.

[0157] Optionally, the determining module 20 is further configured to:

[0158] After the first pressure drop point appears in the current water use stage, the reference sensor that first appeared at the pressure drop point determines whether a pressure drop point appears again within a preset time period after the first pressure sensor appears at the pressure drop point. If no new pressure drop point appears within the preset time period after the first pressure sensor appears at the pressure drop point, or if no new pressure drop point appears within the preset time period after the second pressure sensor appears at the pressure drop point, then a new water use stage is determined to be entered. The reference sensor is either the first pressure sensor or the second pressure sensor.

[0159] If a pressure drop point does not reappear, it is determined that the pressure drop point of the reference sensor and the pressure drop point of another sensor other than the reference sensor at the current water usage stage are caused by the same water usage location.

[0160] Optionally, the determining module 20 is further configured to:

[0161] If a pressure drop point occurs again, record the first time set of each first pressure drop point and the second time set of each second pressure drop point under the current water use stage;

[0162] The number of water usage locations in the current water usage phase is determined based on the number of the first pressure drop points or the number of the second pressure drop points.

[0163] A set of voltage drop point combinations is generated based on each of the first voltage drop points and each of the second voltage drop points. For any voltage drop point group in the set of voltage drop point combinations, one voltage drop point of the voltage drop point group comes from each of the first voltage drop points, and the other voltage drop point of the voltage drop point group comes from each of the second voltage drop points.

[0164] For any group of voltage drop points, the time difference between two voltage drop points in the group of voltage drop points is determined based on the first time set and the second time set.

[0165] The alternative locations corresponding to the pressure drop point group are determined based on the time difference, pipeline length, and preset pressure drop wave propagation speed.

[0166] The position deviation is obtained by comparing the candidate location with the target standard water point location in the set of preset standard water point locations, wherein the target standard water point location is the standard water point location in the set of preset standard water point locations that is closest to the candidate location;

[0167] After determining the positional deviation of each pressure drop point group corresponding to the candidate positions, the pressure drop point group with the smaller positional deviation is selected as the target pressure drop point group. The two pressure drop points in the target pressure drop point group are determined to be caused by the same water use location. The number of target pressure drop point groups is determined based on the number of water use locations.

[0168] Optionally, the control device 100 of the distributed heating system further includes a first adjustment module 40, which is used for:

[0169] Monitor the operating flow rate of the target water heater;

[0170] When the working flow rate rises to a preset first flow rate threshold, the non-working water heaters adjacent to the target water heater on the water supply pipeline are added as new target water heaters, wherein the water supply pipeline is a hot water supply pipeline or a cold water supply pipeline.

[0171] Control the newly added target water heater to supply hot water to the hot water supply pipeline;

[0172] Based on the newly added target water heater, return to the step of monitoring the operating power of the target water heater.

[0173] Optionally, the control module 30 is further configured to:

[0174] A working instruction is sent to the target water heater so that the target water heater performs a start-up self-test after receiving the working instruction, and after the start-up self-test is qualified, the heating component is activated to heat the water supply flowing through it. The start-up self-test includes at least checking the flow rate of the water supply at the inlet.

[0175] Optionally, the control device 100 of the distributed heating system further includes a second adjustment module 50, the second adjustment module 50 being used for:

[0176] For any working water heater, monitor the working flow rate of the working water heater;

[0177] If the working flow rate drops to a preset second flow rate threshold, the last working water heater in the local water heater cluster where the working water heater is located will be turned off. The local water heater cluster includes a main water heater and an auxiliary water heater. The main water heater is the water heater that is triggered to work based on the pressure value, and the auxiliary water heater is the water heater that is triggered to work based on the main water heater.

[0178] The control device for the distributed heating system provided in this application adopts the control method for the distributed heating system in the above embodiments. In the traditional multi-gas water heater combined heating scheme, hot water needs to be transported over a long distance, resulting in excessive heat loss and low energy utilization efficiency. Compared with the prior art, the beneficial effects of the control device for the distributed heating system provided in this application are the same as those of the control method for the distributed heating system provided in the above embodiments. Moreover, other technical features in the control device for the distributed heating system are the same as those disclosed in the method of the above embodiments, and will not be repeated here.

[0179] In addition, to achieve the above objectives, this application also provides an apparatus comprising: a memory, a processor, and a control program for a distributed heating system stored in the memory and executable on the processor, wherein the control program for the distributed heating system, when executed by the processor, implements the steps of the control method for the distributed heating system as described above.

[0180] The specific implementation method of the device in this application is basically the same as the various embodiments of the control method of the above-mentioned distributed heating system, and will not be described again here.

[0181] In addition, to achieve the above objectives, this application also provides a storage medium storing a control program for a distributed heating system, wherein when the control program for the distributed heating system is executed by a processor, it implements the steps of the control method for the distributed heating system as described above.

[0182] The specific implementation of the storage medium in this application is basically the same as the various embodiments of the control method of the above-mentioned distributed heating system, and will not be described again here.

[0183] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0184] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0185] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0186] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A control method for a distributed heating system, characterized in that, The distributed heating system includes multiple water heaters, cold water supply pipelines, and hot water supply pipelines. The installation locations of different water heaters are determined based on different water usage points. For any given water heater, its inlet is connected to the cold water supply pipeline, and its outlet is connected to the hot water supply pipeline. A first pressure sensor and a second pressure sensor are respectively installed at both ends of the hot water supply pipeline. Each water usage point is distributed on the pipeline between the first and second pressure sensors. The pressure sensors are used to collect the pipeline pressure at their respective locations. The control method of the distributed heating system includes the following steps: Monitor the pressure changes of the first pressure sensor and the second pressure sensor; The target water heater at the current water usage location is determined based on the first moment when the pressure drop occurs at the first pressure sensor and the second moment when the pressure drop occurs at the second pressure sensor. Control the target water heater to operate and supply hot water to the hot water supply pipeline; The step of determining the target water heater at the current water usage location based on the first moment when the pressure drop occurs in the first pressure sensor and the second moment when the pressure drop occurs in the second pressure sensor includes: Determine the first pressure drop point that causes the first pressure sensor to detect pressure drop and the second pressure sensor to detect pressure drop at the same water usage location; The current water usage location is determined based on the time difference between the first moment when the first pressure drop point appears and the second moment when the second pressure drop point appears, the pipeline length between the first pressure sensor and the second pressure sensor, and the preset pressure drop wave propagation speed. The water heater closest to the current water usage location is designated as the target water heater. The step of determining the first pressure drop point that causes the first pressure sensor to detect a pressure drop point and the second pressure sensor to detect a pressure drop point at the same water usage location includes: After the first pressure drop point appears in the current water use stage, the reference sensor that first appeared at the pressure drop point determines whether a pressure drop point appears again within a preset time period after the first pressure sensor appears at the pressure drop point. If no new pressure drop point appears within the preset time period after the first pressure sensor appears at the pressure drop point, or if no new pressure drop point appears within the preset time period after the second pressure sensor appears at the pressure drop point, then a new water use stage is determined to be entered. The reference sensor is either the first pressure sensor or the second pressure sensor. If no pressure drop point appears again, it is determined that the pressure drop point of the reference sensor and the pressure drop point of another sensor other than the reference sensor at the current water usage stage are caused by the same water usage location. After the step of determining whether the reference sensor that first detected the voltage drop point will detect a voltage drop point again within a preset time period after the first detection of the voltage drop point, the method includes: If a pressure drop point occurs again, record the first time set of each first pressure drop point and the second time set of each second pressure drop point under the current water use stage; The number of water usage locations in the current water usage phase is determined based on the number of the first pressure drop points or the number of the second pressure drop points. A set of voltage drop point combinations is generated based on each of the first voltage drop points and each of the second voltage drop points. For any voltage drop point group in the set of voltage drop point combinations, one voltage drop point of the voltage drop point group comes from each of the first voltage drop points, and the other voltage drop point of the voltage drop point group comes from each of the second voltage drop points. For any group of voltage drop points, the time difference between two voltage drop points in the group of voltage drop points is determined based on the first time set and the second time set. The alternative locations corresponding to the pressure drop point group are determined based on the time difference, pipeline length, and preset pressure drop wave propagation speed. The position deviation is obtained by comparing the candidate location with the target standard water point location in the set of preset standard water point locations, wherein the target standard water point location is the standard water point location in the set of preset standard water point locations that is closest to the candidate location; After determining the positional deviation of each pressure drop point group corresponding to the candidate positions, the pressure drop point group with the smaller positional deviation is selected as the target pressure drop point group. The two pressure drop points in the target pressure drop point group are determined to be caused by the same water use location. The number of target pressure drop point groups is determined based on the number of water use locations.

2. The control method for a distributed heating system as described in claim 1, characterized in that, After the step of controlling the target water heater to operate and supplying hot water to the hot water supply pipe, the method includes: Monitor the operating flow rate of the target water heater; When the working flow rate rises to a preset first flow rate threshold, the non-working water heaters adjacent to the target water heater on the water supply pipeline are added as new target water heaters, wherein the water supply pipeline is a hot water supply pipeline or a cold water supply pipeline. Control the newly added target water heater to supply hot water to the hot water supply pipeline; Based on the newly added target water heater, return to the step of monitoring the operating power of the target water heater.

3. The control method for a distributed heating system as described in claim 2, characterized in that, The steps of controlling the target water heater to operate and supplying hot water to the hot water supply pipeline include: A working instruction is sent to the target water heater so that the target water heater performs a start-up self-test after receiving the working instruction, and after the start-up self-test is qualified, the heating component is activated to heat the water supply flowing through it. The start-up self-test includes at least checking the flow rate of the water supply at the inlet.

4. The control method for a distributed heating system as described in claim 3, characterized in that, After the step of controlling the target water heater to operate and supplying hot water to the hot water supply pipe, the method further includes: For any working water heater, monitor the working flow rate of the working water heater; If the working flow rate drops to a preset second flow rate threshold, the last working water heater in the local water heater cluster where the working water heater is located will be turned off. The local water heater cluster includes a main water heater and an auxiliary water heater. The main water heater is the water heater that is triggered to work based on the pressure value, and the auxiliary water heater is the water heater that is triggered to work based on the main water heater.

5. A control device for a distributed heating system, characterized in that, The distributed heating system includes multiple water heaters, cold water supply pipelines, and hot water supply pipelines. The installation locations of different water heaters are determined based on different water usage points. For any given water heater, its inlet is connected to the cold water supply pipeline, and its outlet is connected to the hot water supply pipeline. A first pressure sensor and a second pressure sensor are respectively installed at both ends of the hot water supply pipeline. Each water usage point is distributed on the pipeline between the first and second pressure sensors. The pressure sensors are used to collect the pipeline pressure at their respective locations. The control method of the distributed heating system includes the following steps: The monitoring module is used to monitor the pressure value changes of the first pressure sensor and the pressure value changes of the second pressure sensor; The determination module is used to determine the target water heater at the current water usage location based on the first moment when the pressure drop of the first pressure sensor occurs and the second moment when the pressure drop of the second pressure sensor occurs; The control module is used to control the operation of the target water heater and supply hot water to the hot water supply pipeline; The determining module is also used for: Determine the first pressure drop point that causes the first pressure sensor to detect pressure drop and the second pressure sensor to detect pressure drop at the same water usage location; The current water usage location is determined based on the time difference between the first moment when the first pressure drop point appears and the second moment when the second pressure drop point appears, the pipe length between the first pressure sensor and the second pressure sensor, and the preset pressure drop wave propagation speed. The water heater closest to the current water usage location is designated as the target water heater. The determining module is also used for: After the first pressure drop point appears in the current water use stage, the reference sensor that first appeared at the pressure drop point determines whether a pressure drop point appears again within a preset time period after the first pressure sensor appears at the pressure drop point. If no new pressure drop point appears within the preset time period after the first pressure sensor appears at the pressure drop point, or if no new pressure drop point appears within the preset time period after the second pressure sensor appears at the pressure drop point, then a new water use stage is determined to be entered. The reference sensor is either the first pressure sensor or the second pressure sensor. If no pressure drop point appears again, it is determined that the pressure drop point of the reference sensor and the pressure drop point of another sensor other than the reference sensor at the current water usage stage are caused by the same water usage location. The determining module is also used for: If a pressure drop point occurs again, record the first time set of each first pressure drop point and the second time set of each second pressure drop point under the current water use stage; The number of water usage locations in the current water usage phase is determined based on the number of the first pressure drop points or the number of the second pressure drop points. A set of voltage drop point combinations is generated based on each of the first voltage drop points and each of the second voltage drop points. For any voltage drop point group in the set of voltage drop point combinations, one voltage drop point of the voltage drop point group comes from each of the first voltage drop points, and the other voltage drop point of the voltage drop point group comes from each of the second voltage drop points. For any group of voltage drop points, the time difference between two voltage drop points in the group of voltage drop points is determined based on the first time set and the second time set. The alternative locations corresponding to the pressure drop point group are determined based on the time difference, pipeline length, and preset pressure drop wave propagation speed. The position deviation is obtained by comparing the candidate location with the target standard water point location in the set of preset standard water point locations, wherein the target standard water point location is the standard water point location in the set of preset standard water point locations that is closest to the candidate location; After determining the positional deviation of each pressure drop point group corresponding to the candidate positions, the pressure drop point group with the smaller positional deviation is selected as the target pressure drop point group. The two pressure drop points in the target pressure drop point group are determined to be caused by the same water use location. The number of target pressure drop point groups is determined based on the number of water use locations.

6. A control device for a distributed heating system, characterized in that, The control device of the distributed heating system includes: a memory, a processor, and a control program for the distributed heating system stored in the memory and executable on the processor. When the control program for the distributed heating system is executed by the processor, it implements the steps of the control method for the distributed heating system as described in any one of claims 1 to 4.

7. A readable storage medium, characterized in that, The readable storage medium stores a control program for a distributed heating system, which, when executed by a processor, implements the steps of the control method for a distributed heating system as described in any one of claims 1 to 4.

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