Multi-zone hot water supply energy-saving regulation system

Abstract

The application discloses a multi-partition hot water supply energy-saving regulation and control system, relates to the technical field of hot water supply regulation and control, and comprises a central controller, an energy supply module, a partition water supply module, a temperature control and regulation module, a flow monitoring module and an emergency guarantee module which are electrically connected with the central controller. Each module is in logical coordination operation under the overall planning of the central controller, that is, data acquisition-analysis processing-optimization regulation and control-emergency guarantee, is suitable for the differentiated hot water demand of multi-partition in commercial complex hotels, offices and businesses, realizes partition accurate temperature control, energy-saving water supply and emergency continuous water supply, and has the advantages of integrated multi-partition adaptation, energy-saving regulation and control and emergency guarantee.

Description

Technical Field

[0001] This invention relates to the technical field of hot water supply regulation, and in particular to a multi-zone hot water supply energy-saving regulation system. Background Technology

[0002] The hot water supply energy-saving control system is designed for multi-functional buildings such as commercial complexes, adapting to the differentiated hot water usage needs of hotels, offices, and commercial spaces. Through integrated intelligent management and control of energy dispatching, zoned water supply, temperature control, flow monitoring, and emergency backup, it achieves precise temperature control, efficient energy-saving water supply, and continuous water supply during faults. The core solution is to address the energy-saving and stable hot water supply issues in complex multi-zone scenarios.

[0003] Traditional commercial buildings typically adopt a centralized water supply model for their hot water supply systems. Energy supply mainly relies on conventional electric heating and gas boilers, without large-scale utilization of renewable energy sources such as solar energy. The water supply process does not differentiate pump sets and pipelines according to functional zones. Temperature control depends on simple thermostatic valves or manual adjustment. There are no precise means of monitoring flow rate. Emergency backup is only equipped with a single standby pump or small water storage equipment. There is no integrated control logic with central coordination.

[0004] The water usage periods, volumes, and stability requirements of commercial buildings, hotels, offices, and businesses vary greatly. Traditional unified water supply systems cannot adapt to these diverse needs, resulting in extremely high ineffective energy consumption. The system lacks precise temperature control and flow regulation for different zones, leading to large fluctuations in hot water temperature and a poor user experience. It also fails to fully utilize renewable energy sources, resulting in significant energy waste. Furthermore, the lack of an integrated emergency response mechanism means that equipment failures can easily cause water supply interruptions. The system also lacks a collaborative logic for data collection, analysis, processing, optimization, and emergency response, making it unable to simultaneously meet the core needs of precise temperature control for multiple zones, energy-saving water supply, and continuous emergency water supply. Summary of the Invention

[0005] This application provides a multi-zone hot water supply energy-saving control system, which has the advantages of integrated multi-zone adaptation, energy-saving control and emergency protection.

[0006] This application provides a multi-zone hot water supply energy-saving control system, which adopts the following technical solution: A multi-zone hot water supply energy-saving control system includes a central controller and an energy supply module, a zone water supply module, a temperature control module, a flow monitoring module, and an emergency backup module electrically connected to the central controller. Under the overall coordination of the central controller, each module operates collaboratively according to the logic of data acquisition, analysis and processing, optimization and control, and emergency backup. It adapts to the differentiated hot water needs of multi-zone commercial buildings, hotels, offices, and commercial areas, and achieves precise temperature control, energy-saving water supply, and continuous emergency water supply for each zone.

[0007] Preferably, the energy supply module includes three subsystems: a solar thermal collector system, an electric auxiliary heating system, and a gas heat pump system. The solar thermal collector system is suitable for office areas, the electric auxiliary heating system is suitable for commercial areas, and the gas heat pump system is suitable for hotel areas. Hot water is prepared in different zones and centrally controlled by a central controller.

[0008] Preferably, the solar thermal system is equipped with a flat-plate solar collector and a stainless steel insulated water tank, along with level and temperature sensors; the electric auxiliary heating system uses instant electric water heaters distributed at the water usage points; the gas heat pump system is equipped with a gas heat pump unit and a vertical volumetric heat exchanger, and all equipment is connected to a central controller.

[0009] Preferably, the zoned water supply module is configured with variable frequency pump sets according to functional zones: the hotel area is divided into multiple zones for pressurized water supply with one pump set in use and one on standby; the office area is divided into high and low zones with corresponding head pump sets; the commercial area adopts a combination of municipal direct supply and layered pressurization mode; and all water supply pipes are wrapped with thermal insulation cotton.

[0010] Preferably, the temperature control module consists of a digital temperature control panel for water points and an electric two-way valve for pipelines; the temperature control panel collects water temperature and transmits it to the central controller, the electric two-way valve is linked with the temperature control panel, and the central controller adjusts the valve opening according to the water temperature deviation to control the water temperature fluctuation of the zone within ≤±2℃.

[0011] Preferably, the flow monitoring module includes a high-precision electromagnetic flow sensor and an industrial-grade data acquisition unit (one for use and one for backup); the flow sensor collects pipeline flow in real time, and the data acquisition unit transmits the data to the central controller via a 485 bus, simultaneously realizing flow abnormality fault alarm.

[0012] Preferably, the emergency support module includes a stainless steel insulated emergency hot water storage tank and a backup pump group corresponding to the main pump group; when the main pump group fails, the backup pump group will automatically start within 10 seconds, and when the energy module fails, the emergency hot water storage tank will start supplying water within 15 seconds, and the overall emergency response time of the system is ≤30 seconds.

[0013] Preferably, the central controller has a built-in five-dimensional integrated control strategy for office area hibernation, power supply, wake-up, pre-drainage, and antifreeze, and is equipped with a passive mechanical water-triggered switch and a high-precision pipeline temperature sensor, which is suitable for composite scenarios such as non-working hours, temporary overtime, and winter antifreeze in the office area.

[0014] Preferably, the execution rules of the five-dimensional integrated control strategy are as follows: the office area enters hibernation during non-working hours and only maintains micro-pressure on the cleaning branch; when the water switch is triggered, it is immediately woken up by gradient; when the high zone is woken up, the cold water in the pipeline is first pre-emptively drained; when the pipeline water temperature is ≤5℃, the antifreeze micro-circulation is started, and the micro-circulation stops when the water temperature rises to 10℃.

[0015] Preferably, the central controller has functions of pre-adjustment of water usage time, ambient temperature compensation, and adaptive control of pump speed; it automatically wakes up in gradient before the peak water usage in the office area, controls water temperature fluctuations within ≤±1℃, and improves the overall energy utilization efficiency of the system by ≥35% compared with conventional systems.

[0016] In summary, this application has the following beneficial effects: 1. To further optimize the function of coordinated management of hot water supply in multiple zones of commercial complexes, this invention also sets up a central controller that coordinates five major modules: energy supply, zoned water supply, temperature control, flow monitoring, and emergency support. These modules operate in a coordinated manner according to the logic of data acquisition, analysis and processing, optimization and control, and emergency support. This achieves the basic synergistic effect of adapting to the differentiated hot water demand of multiple zones, precise temperature control in zones, and energy-saving water supply, breaking the shortcomings of traditional systems that lack overall coordination and control.

[0017] 2. To further optimize the energy matching and efficient utilization of renewable energy in different functional zones, this invention also sets up a zoned energy subsystem of solar thermal collector, electric auxiliary heating, and gas heat pump, which are adapted to office, commercial, and hotel areas respectively and uniformly scheduled by a central controller. This achieves the effects of maximizing the utilization of renewable energy, zoned hot water preparation, and significantly reducing system energy consumption.

[0018] 3. To further optimize the function of precise temperature control and reduced water temperature fluctuation in zoned hot water, this invention also includes a temperature control module consisting of a digital temperature control panel and an electric two-way valve for pipelines. This module adjusts the valve opening in a coordinated manner, thereby achieving a zoned water temperature fluctuation of ≤±2℃ and significantly improving the user's water experience.

[0019] 4. To further optimize the functions of accurate pipeline flow monitoring and early fault warning, this invention also includes a high-precision electromagnetic flow sensor and a standby data acquisition unit, which transmits data via a 485 bus to achieve real-time flow acquisition, timely alarm for abnormal faults, and to ensure stable water supply.

[0020] 5. To further optimize the emergency water supply function in case of system failure, this invention also includes a stainless steel insulated emergency hot water storage tank and a backup pump set, enabling rapid switching and activation in case of equipment failure. This achieves an emergency response time of ≤30s and uninterrupted water supply in case of failure.

[0021] 6. To further optimize the energy-saving and stable water supply functions in various scenarios in the office area, this invention also sets up a five-dimensional integrated control strategy of hibernation-supply guarantee-wake-pre-drainage-antifreeze, which is used to achieve the effects of significantly reducing losses during non-working hours in the office area, preventing freezing in winter, and responding instantly to temporary water use, thereby further improving the system's energy saving rate and temperature control accuracy. Attached Figure Description

[0022] Figure 1 This is a process flow diagram of the multi-zone hot water supply energy-saving control system in this embodiment. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content. Example 1

[0024] This embodiment 1 discloses a multi-zone hot water supply energy-saving control system, and takes the Tianan Sunshine Plaza project (East Plot) as the application scenario. This project is a typical commercial complex with a total construction area of ​​approximately 86,000 square meters, covering three core functional zones: hotel, office, and commercial. The water demand of each zone is significantly different, and the requirements for the stability, temperature control accuracy, and energy saving of hot water supply are high, which is suitable for the application requirements of the system of this invention.

[0025] Specifically, the multi-zone hot water supply energy-saving control system includes an energy supply module, a zoned water supply module, a temperature control module, a flow monitoring module, and an emergency backup module.

[0026] Firstly, regarding the deployment of the energy supply module, which serves as the core of hot water preparation, its three subsystems are specifically adapted to the three functional zones: the solar thermal system is deployed on the roof of the office area, using 10 flat-plate solar collectors and a 5m³ stainless steel insulated water tank, equipped with level and temperature sensors connected to a central controller, and the pipes are wrapped with insulation cotton to reduce heat loss; the electric auxiliary heating system adopts a decentralized deployment, installing one 3kW instant electric water heater in each of the 32 restrooms in the commercial area to meet the immediate water demand; the gas heat pump system is deployed in the machine room on the second basement floor, using a 100kW gas heat pump unit and a 15m³ vertical volumetric heat exchanger, equipped with a circulation pump and auxiliary monitoring equipment to ensure a stable centralized water supply in the hotel area.

[0027] Secondly, the zoned water supply module is divided into water supply units according to functional zones to meet the water supply needs of different floors: the hotel area adopts zoned pressurized water supply, divided into four zones and equipped with four sets of variable frequency pumps (30-80m head), using a one-in-one-backup mode; the office area is divided into two water supply zones, equipped with two sets of variable frequency pumps (40m and 70m head), installed in the roof equipment room; the commercial area from the first floor to the third basement level uses direct municipal water supply, with one 35m head variable frequency pump set configured on the second and third floors to ensure that the water supply pressure meets the standards. All pipes in each area use suitable materials and are wrapped with insulation cotton to ensure smooth water supply and reduce heat loss.

[0028] Furthermore, the temperature control module adopts a collaborative deployment mode, with a total of 186 digital temperature control panels installed near the water points in each zone. These panels support temperature settings and status displays from 40 to 60 degrees Celsius and are connected to the central controller via wires. At the same time, 98 DN50 brass electric two-way valves are installed on the hot water pipes in each zone, which are linked to the temperature control panels to automatically adjust the valve opening according to the water temperature, ensuring accurate temperature control.

[0029] In addition, the flow monitoring module is used to accurately collect data. A total of 68 electromagnetic flow sensors with an accuracy of 0.5% are installed in each zone of the pipeline to adapt to different pipe specifications. The installation positions are avoided in areas where water flow disturbance occurs. Two industrial-grade data acquisition units are installed in the computer room on the second basement floor (one for use and one for backup). The sensors are connected to the central controller via a 485 bus to realize real-time collection, storage and transmission of flow data, and have a fault alarm function.

[0030] The emergency backup module ensures continuous water supply in case of failure. A 10m³ stainless steel insulated emergency hot water storage tank is installed in the basement machine room, equipped with level and temperature sensors and inlet / outlet valves, connected to the piping of each zone and replenished with hot water regularly. Seven backup pump sets correspond one-to-one with the main pump set (one for use and one for standby), automatically activating in case of failure and responding promptly. The central controller is installed in the control room of the basement machine room, possessing data processing, remote monitoring, and multi-module control functions, and is the core of the system operation.

[0031] During the operation of this system, the energy supply module, zoned water supply module, temperature control module, flow monitoring module, and emergency support module work collaboratively under the overall coordination of the central controller, strictly following the logic of "data acquisition - analysis and processing - optimization and control - emergency support". The specific process is as follows: During daily operation and control, the central controller receives flow and temperature data in real time to optimize energy supply and water supply control: the office area prioritizes the activation of the solar thermal system, storing water at 45-55℃ in the insulated water tank, and supplementing it with the electric auxiliary heating system when the temperature is insufficient; the hotel area uses the gas heat pump system to continuously produce 50℃ hot water, which is then distributed in zones through the variable frequency pump group; the commercial area controls the municipal water supply and booster pump group as needed, and the toilets are supplied with water immediately by the electric auxiliary heating system.

[0032] In terms of temperature control, the temperature control panel collects water temperature in real time and transmits it to the central controller. When the water temperature is 5°C lower than the set value, the electric two-way valve increases the opening to increase the water supply. When it is 5°C higher than the set value, the opening decreases to ensure that the water temperature fluctuation is ≤±2°C. At the same time, the central controller has a temperature compensation function, which finely adjusts the set value according to the ambient temperature, taking into account both user experience and energy saving.

[0033] In the flow regulation process, the flow sensor collects data once per minute. The central controller compares the real-time flow with the design value. When the flow is 10% lower than the design value, the pump group is started to speed up, and when it is 10% higher, the speed is reduced. At the same time, it is pre-adjusted according to the water usage pattern to avoid insufficient water supply or energy waste during peak periods.

[0034] In the emergency response process, if the main pump unit fails, the backup pump unit will automatically start within 10 seconds and issue an alarm; if the energy supply module fails, the emergency hot water storage tank will start supplying water within 15 seconds and can continuously supply water for 3-6 hours. The emergency response time is ≤30 seconds, ensuring uninterrupted water supply.

[0035] To ensure the system operates stably and efficiently, a 15-day debugging period was conducted after deployment, which was divided into individual module debugging and overall linkage debugging. During individual debugging, the operation, parameter settings and signal transmission of each module were checked to ensure that each component met the design requirements. During overall linkage debugging, the central controller was started, various working conditions were simulated, and control parameters were optimized to ensure that each module operated in coordination and that the overall system performance met the standards.

[0036] After successful commissioning, the system was put into operation for three months. Test results verified its practicality and reliability: in terms of temperature control accuracy, the water temperature fluctuation in each zone was ≤±2℃, meeting the design requirements; in terms of water supply stability, there were no water supply interruptions, and the flow fluctuation was within ±10%; the energy-saving effect was significant, with energy utilization efficiency improved by 35%, saving approximately 12,000 kWh of energy per year; the emergency response was timely, with backup pumps and emergency water tanks starting up quickly; user satisfaction reached over 95%, fully meeting the water demand of multiple zones in the commercial complex. Example 2

[0037] By adding a five-dimensional integrated control strategy of hibernation, water supply guarantee, wake-up, pre-emption, and antifreeze to the central controller, the office area can be adapted to complex scenarios such as fixed zero water use, micro-volume cleaning water use, temporary overtime water use, long pipelines in high-rise areas, and low-temperature antifreeze in winter, further improving energy-saving effect and water supply stability.

[0038] By installing passive mechanical water trigger switches next to the water points in the restrooms and tea rooms on each floor of the office area, no external power supply is required. The trigger signal is directly transmitted to the central controller to identify sudden water demand during overtime work. Temperature sensors were installed on the water supply pipes and rooftop solar water pipes in the high-rise office area (floors 12-19). The sensors have a detection accuracy of ±0.5℃ and collect the water temperature in real time for antifreeze control and temperature replenishment judgment.

[0039] The central controller has a built-in dedicated control program for the office area, with preset parameters such as sleep period, pressure holding parameters, wake-up gradient, and antifreeze threshold, and it can be seamlessly linked with the original temperature control, flow, and pump control modules.

[0040] The central controller will enter sleep mode according to preset time periods: 18:00-7:50 the next day on weekdays, and all day on weekends and statutory holidays are the basic sleep periods for the office area; during sleep mode, the electric two-way valve of the main water supply pipeline in the office area will be closed, the regular circulation of the main variable frequency pump group will be stopped, and only the cleaning water branch will be kept at a constant micro pressure of 0.15MPa to prevent ineffective circulation energy consumption of the main pipeline.

[0041] During the dormant period, it only responds to the cleaning water needs of each floor's restrooms 1-2 times per day, with each time lasting ≤1 minute; when the water temperature of the cleaning branch is below 38℃, the central controller only starts the solar thermal collector system for low-power supplementary heating (single supplementary heating time ≤5 minutes), and prohibits the intervention of the electric auxiliary heating system, so as to meet the needs of micro-water usage without additional energy consumption.

[0042] During the hibernation period, when the passive mechanical water trigger switch at any water point in the office area is triggered, the central controller immediately interrupts the hibernation and starts the gradient wake-up program: within 1 minute, the variable frequency pump set is increased to the basic speed, the electric two-way valve is gradually opened, and hot water that meets the standard is quickly output to meet the immediate water needs of temporary overtime work.

[0043] When the high-level office area (floors 12-19) is woken up, the central controller prioritizes the cold water pre-draining logic: it starts the high-level variable frequency pump and runs at 30% of the rated speed for 30 seconds to drain the accumulated cold water in the pipeline into the return water pipeline, and then gradually increases the pump speed and adjusts the water supply temperature to avoid water waste caused by users discharging cold water and ensure that the water is hot as soon as it is dispensed.

[0044] When the pipeline temperature sensor detects that the water temperature in the office area pipeline is ≤5℃, the central controller automatically starts the anti-freeze micro-circulation: the variable frequency pump set runs at a low speed of 30% of the rated speed to maintain a small flow rate circulation in the pipeline and prevent the pipeline from freezing; when the pipeline water temperature rises to 10℃, the micro-circulation automatically stops and returns to the dormant state.

[0045] At 7:50 on weekdays (10 minutes before the water usage period), the central controller automatically starts gradient wake-up: gradually increasing the speed of the variable frequency pump and opening the electric two-way valve in three stages to steadily increase the water supply temperature, ensuring that when the water usage peak arrives at 8:00, the water temperature fluctuation is ≤±1℃, which is better than the temperature control accuracy of the first embodiment.

[0046] This embodiment was applied to the office area of ​​the Tianan Sunshine Plaza project (East Plot). Actual measurements showed that: ineffective energy consumption during non-working hours in the office area was reduced by more than 60%, and the overall energy utilization efficiency of the system was improved by 12% compared to the first embodiment; it completely solved problems such as slow response to water use during temporary overtime work, waste of cold water drainage in high-rise areas, and the risk of pipe freezing in winter; the hot water outlet temperature fluctuation in the office area was stable at ≤±1℃, and user water satisfaction increased to over 98%; the idle running time of equipment such as variable frequency pump sets and electric two-way valves was reduced by 70%, significantly reducing equipment aging and extending service life.

[0047] Working principle: First, after the system is powered on and started, the central controller initiates the full-domain data acquisition process. The digital temperature control panel of the temperature control module collects the water temperature of each zone's water point in real time. The high-precision electromagnetic flow sensor of the flow monitoring module collects the real-time flow of the pipeline. The liquid level and temperature sensors of the energy supply module simultaneously collect the operating parameters of the solar thermal collector, electric auxiliary heating, and gas heat pump subsystems. The emergency support module provides real-time feedback on the status of the emergency hot water storage tank and the main and standby pump groups. All data is transmitted to the central controller via the 485 bus, completing the multi-dimensional, full-link data acquisition work of water temperature, flow, energy, and emergency status.

[0048] Then, the central controller performs centralized analysis and processing of the collected data. Combining the differentiated needs of hotels for 24-hour continuous water use, offices for concentrated water use during specific hours, and businesses for decentralized and immediate water use, it matches the preset zone control parameters to determine whether the water supply pressure and temperature of each zone meet the standards, whether the energy supply is sufficient, whether there are abnormal fluctuations in flow, and whether emergency equipment is in standby mode. It then quickly generates core control instructions for zone energy scheduling, water supply regulation, temperature control correction, and emergency preparedness.

[0049] Subsequently, the central controller performs full-area optimization and control operations. On the energy supply side, the solar thermal system is prioritized to prepare hot water for the office area. When the heat is insufficient, the electric auxiliary heating system is activated to supplement it. The gas heat pump system continuously and stably supplies constant-temperature hot water to the hotel area, and the instant electric water heaters in the commercial area respond instantly as needed. On the zoned water supply side, the pump speed and water pressure are adaptively adjusted according to the mode of one-use-one-standby variable frequency pump for the hotel, dedicated pump sets for high and low zones of the office area, and direct municipal supply plus tiered pressurization for the commercial area. On the temperature control side, the opening of the electric two-way valve is adjusted in real time according to the water temperature deviation to control the water temperature fluctuation of the regular zones within ±2℃, so as to avoid the impact of water temperature fluctuations on the user experience.

[0050] Next, for the combined scenarios of non-working hours, temporary overtime, and winter freeze prevention in the office area, the central controller starts a five-dimensional control strategy of hibernation-supply guarantee-wake-pre-drainage-freeze prevention. During non-working hours, it automatically enters hibernation mode, retaining only the cleaning branch with slight pressure maintenance. When the water switch is triggered, it immediately wakes up in a gradient manner. When the high-temperature zone is woken up, the cold water in the pipeline is pre-drained. When the pipeline water temperature is ≤5℃, the freeze prevention micro-circulation is started. Before the peak water usage, it is automatically pre-adjusted to accurately control the water temperature fluctuation in the office area within ±1℃, which greatly reduces the energy consumption of ineffective circulation during non-working hours.

[0051] Finally, the system maintains a closed-loop emergency response throughout the entire process. The central controller monitors the operating status of the main pump group and energy module in real time. In the event of a main pump group failure, the backup pump group automatically starts within 10 seconds. In the event of an energy module failure, the emergency hot water storage tank is put into operation within 15 seconds, ensuring an overall emergency response time of ≤30 seconds and guaranteeing uninterrupted water supply to multiple zones. Simultaneously, the central controller continuously collects operational data and iteratively optimizes control parameters to maintain the system's long-term efficient, stable, and energy-saving operation, ultimately achieving the core objectives of precise temperature control, energy-saving water supply, and continuous emergency water supply for the commercial complex.

[0052] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multi-zone hot water supply energy-saving control system, characterized in that, It includes a central controller and an energy supply module, a zoned water supply module, a temperature control module, a flow monitoring module, and an emergency backup module that are electrically connected to the central controller; Under the overall control of the central controller, each module operates collaboratively according to the logic of data acquisition, analysis and processing, optimization and control, and emergency support. It adapts to the differentiated hot water needs of multiple zones in commercial complexes, hotels, offices, and commercial areas, and achieves precise temperature control, energy-saving water supply, and continuous emergency water supply.

2. The multi-zone hot water supply energy-saving control system according to claim 1, characterized in that, The energy supply module includes three subsystems: a solar thermal collector system, an electric auxiliary heating system, and a gas heat pump system. The solar thermal collector system is suitable for office areas, the electric auxiliary heating system is suitable for commercial areas, and the gas heat pump system is suitable for hotel areas. Hot water is prepared in different zones and centrally controlled by a central controller.

3. The multi-zone hot water supply energy-saving control system according to claim 2, characterized in that, The solar thermal system is equipped with flat-plate solar collectors and stainless steel insulated water tanks, along with level and temperature sensors; the electric auxiliary heating system uses instant electric water heaters distributed at the water usage points; the gas heat pump system is equipped with gas heat pump units and vertical volumetric heat exchangers, and all equipment is connected to a central controller.

4. The multi-zone hot water supply energy-saving control system according to claim 1, characterized in that, The zoned water supply module is configured with variable frequency pump sets according to functional zones: the hotel area is divided into multiple zones with pressurized water supply and one pump set is used and one is on standby; the office area is divided into high and low zones with corresponding head pump sets; the commercial area adopts a combination of municipal direct supply and layered pressurization mode; all water supply pipes are wrapped with thermal insulation cotton.

5. The multi-zone hot water supply energy-saving control system according to claim 1, characterized in that, The temperature control module consists of a digital temperature control panel for water points and an electric two-way valve for pipelines. The temperature control panel collects water temperature and transmits it to the central controller. The electric two-way valve is linked with the temperature control panel. The central controller adjusts the valve opening according to the water temperature deviation to control the water temperature fluctuation of the zone within ≤±2℃.

6. The multi-zone hot water supply energy-saving control system according to claim 1, characterized in that, The flow monitoring module includes a high-precision electromagnetic flow sensor and an industrial-grade data acquisition unit with one active and one standby device. The flow sensor collects pipeline flow in real time, and the data acquisition unit transmits the data to the central controller via a 485 bus, simultaneously realizing flow abnormality fault alarms.

7. The multi-zone hot water supply energy-saving control system according to claim 1, characterized in that, The emergency support module includes a stainless steel insulated emergency hot water storage tank and a backup pump set corresponding to the main pump set; when the main pump set fails, the backup pump set will automatically start within 10 seconds, and when the energy module fails, the emergency hot water storage tank will start supplying water within 15 seconds, with the overall emergency response time of the system ≤30 seconds.

8. The multi-zone hot water supply energy-saving control system according to claim 1, characterized in that, The central controller incorporates a five-dimensional integrated control strategy for office area hibernation, power supply, wake-up, pre-drainage, and antifreeze. It is equipped with a passive mechanical water-triggered switch and a high-precision pipeline temperature sensor, making it suitable for combined scenarios such as non-working hours, temporary overtime, and winter antifreeze in the office area.

9. The multi-zone hot water supply energy-saving control system according to claim 8, characterized in that, The five-dimensional integrated control strategy is executed as follows: the office area enters a dormant state during non-working hours and only maintains micro-pressure on the cleaning branch; when the water switch is triggered, it is immediately woken up by gradient; when the high zone is woken up, the cold water in the pipeline is first pre-emptively drained; when the pipeline water temperature is ≤5℃, the antifreeze micro-circulation is started, and the micro-circulation stops when the water temperature rises to 10℃.

10. The multi-zone hot water supply energy-saving control system according to claim 1, characterized in that, The central controller has functions such as pre-adjustment of water usage time, ambient temperature compensation, and adaptive control of pump speed; it automatically wakes up in gradient before the peak water usage time in the office area to control water temperature fluctuations within ≤±1℃.

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