Control method for fan coil in public area of building

Abstract

The invention discloses a method for controlling fan coils in a public area of a building, which is characterized in that power supplies of a plurality of fan coil fans and electric two-way valves are respectively led to the same loop of a floor distribution box and are controlled by a building control system to realize centralized start and stop, and compared with the traditional decentralized control, each device does not need to be operated independently, so that the management efficiency is greatly improved; meanwhile, a temperature sensor is arranged in the area to provide temperature control data for a building control system, and the building control system controls power loop switches of an electric two-way valve and a fan coil fan, so that the temperature is controlled within a set range, and the temperature requirement of the public area is met; besides, data are transmitted to the building control system in real time through the temperature sensor, the building control system generates an instruction in time to adjust the running state of the fan coil, when the temperature fluctuates due to personnel flow and external environment changes, response can be made rapidly, discomfort and energy waste caused by excessive temperature change and long-time running are avoided, and the energy consumption is reduced. And energy waste caused by the fact that no person closes the public area wind disc after work is avoided.

Description

Technical Field

[0001] This invention relates to the field of building fan coil unit control technology, and in particular to a control method for fan coil units in public areas of buildings. Background Technology

[0002] In building construction, the control of fan coil units in public areas is crucial for creating humanized management, a comfortable environment, and achieving energy-saving goals. However, traditional control methods for fan coil units in public areas of buildings often have many drawbacks.

[0003] If the fan coil units in public areas are not included in the building control system, each fan coil unit in the public area will be equipped with a local thermostat. This will lead to inhumane management of the fan coil units in public areas, as well as energy waste caused by excessively high or low temperature settings, accidental on / off of fan coil units, or forgetting to turn them off.

[0004] To address the lack of management of fan coil units in public areas, current technology involves controlling multiple fan coil units within the same area using a single thermostat, reducing the number of thermostats required and improving property management. However, this control method frequently burns out the fan coil units' fans, preventing them from functioning properly. Controlling multiple fan coil units with a single thermostat essentially connects several motors in parallel, which is equivalent to supplying power to several inductor coils in parallel. At the moment of switching on and off, each inductor coil generates an induced electromotive force (EMF) opposite to the applied voltage, also known as a back EMF. Back EMF refers to the EMF generated against the tendency of the current to change. This back EMF, superimposed on the power supply voltage, acts on the two ends of the motor coil. If the fan coil units are of different sizes, the two coils will be of different sizes, resulting in different magnitudes and durations of their back EMFs. Under high voltage, the motor with the weaker potential will burn out.

[0005] To avoid the above problems, fan coil units in public areas can use networked fan coil thermostats and be centrally controlled via the Internet of Things. However, for public areas, setting up a networked thermostat for each fan coil unit increases the initial investment and may also lead to chaotic control commands due to differences in the detection data of different sensors, making it impossible to achieve temperature control.

[0006] Therefore, a control method for public area fan coil units that can achieve the goal, has simpler control logic, and does not increase too much investment is more needed for engineering. Summary of the Invention

[0007] In view of this, the present invention proposes a control method for fan coil units in public areas of buildings, which can effectively solve the defects of existing technologies in the lack of centralized management and inability to achieve temperature control for fan coil units in public areas.

[0008] The technical solution of this invention is implemented as follows:

[0009] A method for controlling fan coil units in a building's common areas, specifically including:

[0010] The power supply for the fans and electric two-way valves of multiple fan coil units in the same public area is respectively drawn from the same power circuit of the floor distribution box.

[0011] The building control system controls the power circuit to achieve centralized start-up, shutdown, and temperature control of multiple fan coil units in the same public area;

[0012] A temperature sensor is installed in the same public area to detect the temperature data of the public area.

[0013] The building control system generates control commands based on the temperature data of the public areas, and controls the power circuit switches of the fan coil units and electric two-way valves to achieve control of the fan coil units in the public areas.

[0014] As a further optional solution to the control method for fan coil units in the common area of ​​the building, the step of drawing the power supply for the fans and electric two-way valves of multiple fan coil units in the same common area from the same power circuit of the floor distribution box specifically includes:

[0015] Calculate the total power required for fan coil units within the same common area;

[0016] Based on the calculated total power, select a suitable power circuit in the floor distribution box, wherein the rated load capacity of the power circuit is not less than 1.2 times the total power;

[0017] The power supply for the fans and electric two-way valves of multiple fan coil units in the same public area is respectively drawn from the same power circuit of the selected floor distribution box.

[0018] As a further optional solution to the control method for fan coil units in the common area of ​​the building, the method of controlling the power supply circuit according to the building control system to realize the centralized start-up and shutdown of multiple fan coil units in the same common area specifically includes:

[0019] As a further optional solution to the control method for fan coil units in the common areas of the building, the provision of a temperature sensor within the same common area specifically includes:

[0020] When a single temperature sensor is installed in the same public area, the coverage area of ​​its installation location is determined based on a maximum temperature difference ΔT ≤ 2℃, where ΔT is calculated using the following formula:

[0021] ;

[0022] In the formula, This represents the maximum measured temperature at the furthest point from the temperature sensor within the public area. This is the minimum measured temperature within the public area closest to the temperature sensor.

[0023] As a further optional solution for the control method of the fan coil units in the building's public areas, the building control system generates control commands based on the temperature data of the public areas to control the opening and closing of the electric two-way valve of the fan coil unit, specifically including:

[0024] Collect real-time temperature values ​​from a single temperature sensor within a public area;

[0025] When the difference between the collected temperature data and the set value is lower than the preset threshold, a control command is generated to cut off the power supply to the fan coil unit and the electric two-way valve; otherwise, a control command is generated to turn on the power supply to the fan coil unit and the electric two-way valve.

[0026] As a further optional solution to the control method for fan coil units in the building's public areas, the valve opening and closing threshold is generated based on the current operating conditions and historical data, using the following formula:

[0027] ;

[0028] ;

[0029] in, To preset the target temperature, The historical highest temperature is represented by γ, which is the adaptive coefficient for operating conditions, dynamically adjusted according to seasonal and regional heat load. t is the time difference between the current moment and the historical extreme value recording time, and τ is the time constant. This is the lowest temperature in history.

[0030] A control system for fan coil units in a building's common area includes:

[0031] The power circuit module is used to draw the power supply of the fans and electric two-way valves of multiple fan coil units in the same public area from the same power circuit of the floor distribution box.

[0032] The building control system module is connected to the power circuit module and is used to control the power circuit according to control commands to realize centralized start-up and shutdown and temperature control of multiple fan coil units in the same public area;

[0033] A temperature sensor module is installed in the same public area to detect the temperature data of the public area;

[0034] A control command generation module is set within the building control system module and is used to generate control commands based on the temperature data detected by the temperature sensor module.

[0035] The electric two-way valve control module is connected to the building control system module and is used to control the opening and closing of the electric two-way valve of the fan coil unit according to the control command to achieve temperature control.

[0036] A computing device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of any of the above-described control methods for fan coil units in a building's common area.

[0037] A computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of any of the above-described control methods for fan coil units in a building's common area.

[0038] The beneficial effects of this invention are as follows: By drawing the power supply of multiple fan coil units and electric two-way valves in the same public area from the same power circuit of the floor distribution box, and controlling this power circuit according to the building control system, centralized start-up and shutdown of multiple fan coil units can be easily achieved. Compared with the traditional decentralized control method, there is no need to operate each fan coil unit individually, which greatly improves management efficiency. For example, during the building's non-business hours or specific maintenance periods, all fan coil units in the area can be shut down with a single click through the building control system, avoiding the tedious process of manually shutting them down one by one and the possibility of omissions. Furthermore, by setting up a temperature sensor in the same public area, the inconvenience caused to property management by setting up local thermostats for each fan coil unit in the public area is avoided, thus improving the building's efficiency. The control system provides accurate data, which the building control system uses to generate instructions and precisely control the power circuit switching of the fan coil units and electric two-way valves, keeping the temperature within the set range and meeting the temperature requirements of the public areas. Temperature sensors detect the temperature data of the public areas in real time and transmit it to the building control system. The building control system can promptly generate control instructions based on this data to control the power circuit switching of the fan coil units and electric two-way valves. When the temperature of the public areas fluctuates due to factors such as personnel movement and changes in the external environment, the building control system can react quickly and adjust the operating status of the fan coil units, avoiding discomfort and energy waste caused by excessive temperature rise or excessive high-power operation, and also avoiding energy waste caused by leaving the fan coil units in the public areas unattended after get off work. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1This is a flowchart illustrating a control method for fan coil units in common areas of a building according to the present invention.

[0041] Figure 2 This is a schematic diagram illustrating the composition of a control system for a fan coil unit in a building's public area according to the present invention.

[0042] Figure 3 This is a schematic diagram of the composition of a computing device according to the present invention. Detailed Implementation

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] refer to Figures 1 to 3 A control method for fan coil units in public areas of buildings, specifically including:

[0045] The power supply for the fans and electric two-way valves of multiple fan coil units in the same public area is respectively drawn from the same power circuit of the floor distribution box; in some embodiments, the step of drawing the power supply for the fans and electric two-way valves of multiple fan coil units in the same public area from the same power circuit of the floor distribution box specifically includes:

[0046] Calculate the total power required for fan coil units within the same common area. ,in Let be the rated power of the i-th fan coil unit, and n be the total number of fan coil units in the public area;

[0047] Based on the calculated total power, select a suitable power circuit in the floor distribution box, wherein the rated load capacity of the power circuit is not less than 1.2 times the total power;

[0048] The power supply for the fans and electric two-way valves of multiple fan coil units within the same public area is drawn from the same power circuit of the selected floor distribution box. The floor distribution box consists of a single enclosure comprising power distribution and control components. The power supply circuit for the fan coil units and electric two-way valves is simultaneously controlled by a locally controlled switch and a switch controlled by the building temperature sensor signal.

[0049] Specifically, by calculating the total power required by the fan coil units in the same public area, the overall power demand of the fan coil units in that area can be accurately determined. This provides accurate data support for the subsequent selection of a suitable power circuit, avoiding the problem of selecting a power circuit that is too large or too small due to inaccurate power estimation. Based on the calculated total power, a suitable power circuit with a rated load capacity of not less than 1.2 times the total power is selected in the floor distribution box. This selection method ensures that the power circuit can meet the power demand of the fan coil units, while also considering a certain amount of redundancy to cope with possible power fluctuations or future equipment additions. At the same time, it avoids the waste of resources and increased costs caused by using an oversized power circuit, thus achieving the rationality and economy of power configuration.

[0050] Centralizing the power supply of multiple fan coil units from a single power circuit significantly simplifies wiring layout. Compared to each fan coil unit drawing power from a separate power circuit, this reduces the number and complexity of lines, lowers the difficulty and workload of wiring installation, and makes maintenance and management more convenient. During equipment maintenance, troubleshooting, or power monitoring, only this single power circuit needs to be monitored, eliminating the need to inspect the individual power lines of multiple devices, thus improving maintenance efficiency and reducing maintenance costs.

[0051] The building control system controls the power circuit to achieve centralized start-up and shutdown of multiple fan coil units in the same public area.

[0052] A temperature sensor is installed within the same public area to detect temperature data in the public area. In some embodiments, installing a temperature sensor within the same public area specifically includes:

[0053] When a single temperature sensor is installed in the same public area, the coverage area of ​​its installation location is determined based on a maximum temperature difference ΔT ≤ 2℃, where ΔT is calculated using the following formula:

[0054] ;

[0055] In the formula, This represents the maximum measured temperature at the furthest point from the temperature sensor within the public area. This is the minimum measured temperature within the public area closest to the temperature sensor.

[0056] Specifically, by setting up a single temperature sensor in the same public area, compared to deploying multiple temperature sensors in the area, the number of sensors used is greatly reduced. This not only reduces the equipment procurement cost, but also simplifies the equipment installation and commissioning process, saving manpower and time costs.

[0057] Through the maximum temperature difference (in This represents the maximum measured temperature at the furthest point from the temperature sensor within the public area. The installation location of the temperature sensor is determined by the minimum measured temperature at the closest point to the temperature sensor in the public area, and ΔT ≤ 2℃ is required. This method fully considers the temperature distribution in the public area, ensuring that the sensor is installed in a position that can comprehensively and accurately reflect the temperature of the entire area. Using the maximum temperature difference as a reference to determine the installation location enables the sensor to capture key information about temperature differences within the area, making the detected temperature data more representative. This avoids the problem that the detection data cannot truly reflect the overall temperature of the public area due to improper sensor placement, and provides a reliable data foundation for subsequent temperature control.

[0058] Because the temperature sensors are installed in a reasonable location, the detected temperature data is accurate and reliable. The building control system can generate more precise control commands based on this data, thereby achieving precise control of equipment such as fan coil units. For example, during summer cooling, the cooling capacity can be adjusted in a timely manner according to the actual temperature to avoid over-cooling or under-cooling.

[0059] The building control system generates control commands based on public area temperature data to control the opening and closing of the electric two-way valves of the fan coil units, thereby achieving temperature control. In some embodiments, the building control system generates control commands based on public area temperature data to control the opening and closing of the electric two-way valves of the fan coil units, specifically including:

[0060] Collect real-time temperature values ​​from a single temperature sensor within a public area;

[0061] When the difference between the collected temperature data and the set value is lower than the preset threshold, a control command is generated to cut off the power supply to the fan coil unit and the electric two-way valve; otherwise, a control command is generated to turn on the power supply to the fan coil unit and the electric two-way valve.

[0062] Specifically, by collecting real-time temperature values ​​from a single temperature sensor in the public area and generating control commands based on this data to control the opening and closing of the electric two-way valve of the fan coil unit, the temperature can be adjusted in a timely manner according to the actual temperature situation, so that the temperature in the public area is as close as possible to the set value, thereby achieving more precise temperature control and improving the comfort of the public area.

[0063] When the difference between the collected temperature data and the set value is lower than the preset threshold, the power supply to the fan coil unit fan and the electric two-way valve is cut off, avoiding unnecessary energy consumption; the relevant equipment is only turned on when the temperature does not meet the requirements, realizing automated control according to actual needs, effectively saving energy and reducing operating costs.

[0064] Using the real-time temperature value of a single temperature sensor in the public area as the control basis simplifies the logic and structure of the control system, reduces the number of sensors used, lowers the system complexity and cost, and also facilitates the installation, debugging and maintenance of the system.

[0065] In some embodiments, the valve opening and closing threshold is generated based on the current operating conditions and historical data, and the specific formula is as follows:

[0066] ;

[0067] ;

[0068] in, To preset the target temperature, The historical highest temperature is represented by γ, which is an adaptive coefficient for operating conditions, dynamically adjusted according to seasonal and regional heat load, ranging from 0.4 to 0.8. t is the time difference between the current moment and the historical extreme value recording moment, and τ is a time constant, set to 12 in summer, 8 in winter, and 10 in transitional seasons. This is the lowest temperature in history.

[0069] Specifically, the adaptive coefficient γ is dynamically adjusted according to the season and regional heat load, with a value ranging from 0.4 to 0.8. The heat load varies greatly in different seasons. For example, in summer, the outdoor temperature is high and the heat dissipation demand in public areas is large, requiring a larger cooling capacity. In winter, the opposite is true. By dynamically adjusting the value of γ, the valve opening and closing threshold can better adapt to the heat load changes brought about by seasonal changes, ensuring that relatively accurate temperature control can be achieved in different seasons. The regional heat load is also affected by factors such as personnel activities and equipment operation. The dynamically adjusted value of γ can make the valve opening and closing threshold more closely match the actual regional heat load situation, avoiding temperature control failure or energy waste due to changes in heat load.

[0070] The formula incorporates the historical highest temperature. and the lowest historical temperature By combining the time constant τ and the time difference t between the current moment and the historical extreme value recording moment, this design takes into account the temperature change trend over time. For example, the temperature may show a certain periodic change during the day. By calculating the historical extreme value and the time difference, the direction and magnitude of the current temperature change can be better predicted. By generating thresholds using historical data, the building control system can optimize the control strategy based on the temperature situation over a period of time. For example, if historical data shows that the temperature is usually higher during a certain period, the system can adjust the valve opening and closing thresholds in advance to prepare for temperature regulation and improve the timeliness and effectiveness of control.

[0071] The result is obtained by calculating using the above formula. and It can more accurately determine the opening and closing timing of the electric two-way valve of the fan coil unit. Compared with a fixed threshold setting, this threshold calculated based on multiple factors can better match the actual needs, making temperature control more precise, reducing temperature fluctuations, and improving the comfort of public areas.

[0072] Precise valve opening and closing thresholds can prevent fan coil units from operating unnecessarily. For example, when the temperature is within a comfortable range and there is no obvious trend of change, the valve remains closed, reducing equipment uptime and energy consumption.

[0073] A control system for fan coil units in a building's common area includes:

[0074] The power circuit module is used to draw power from the same power circuit of the floor distribution box to multiple fan coil units in the same public area.

[0075] The building control system module is connected to the power circuit module and is used to control the power circuit according to control commands to realize the centralized start-up and shutdown of multiple fan coil units in the same public area;

[0076] A temperature sensor module is installed in the same public area to detect the temperature data of the public area;

[0077] A control command generation module is set within the building control system module and is used to generate control commands based on the temperature data detected by the temperature sensor module.

[0078] The electric two-way valve control module is connected to the building control system module and is used to control the opening and closing of the electric two-way valve of the fan coil unit according to the control command to achieve temperature control.

[0079] A computing device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of any of the above-described control methods for fan coil units in a building's common area.

[0080] A computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of any of the above-described control methods for fan coil units in a building's common area.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A control method for fan coil units in a building's public area, characterized in that, Specifically, it includes: The power supply for the fans and electric two-way valves of multiple fan coil units in the same public area is respectively drawn from the same power circuit of the floor distribution box. The building control system controls the power circuit to achieve centralized start-up, shutdown, and temperature control of multiple fan coil units in the same public area; A temperature sensor is installed in the same public area to detect the temperature data of the public area. The building control system generates control commands based on the temperature data of the public areas, and controls the power circuit switches of the fan coil units and electric two-way valves to achieve control of the fan coil units in the public areas.

2. The control method for fan coil units in public areas of buildings according to claim 1, characterized in that, The method of drawing the power supply for the fans and electric two-way valves of multiple fan coil units in the same public area from the same power circuit of the floor distribution box specifically includes: Calculate the total power required for fan coil units within the same common area; Based on the calculated total power, select a suitable power circuit in the floor distribution box, wherein the rated load capacity of the power circuit is not less than 1.2 times the total power; The power supply for the fans and electric two-way valves of multiple fan coil units in the same public area is respectively drawn from the same power circuit of the selected floor distribution box.

3. The control method for fan coil units in public areas of buildings according to claim 2, characterized in that, The installation of a temperature sensor within the same public area specifically includes: When a single temperature sensor is installed in the same public area, the coverage area of ​​its installation location is determined based on a maximum temperature difference ΔT ≤ 2℃, where ΔT is calculated using the following formula: ； In the formula, This represents the maximum measured temperature at the furthest point from the temperature sensor within the public area. This is the minimum measured temperature within the public area closest to the temperature sensor.

4. The control method for fan coil units in public areas of buildings according to claim 3, characterized in that, The building control system generates control commands based on public area temperature data to control the opening and closing of the electric two-way valves of the fan coil units, specifically including: Collect real-time temperature values ​​from a single temperature sensor within a public area; When the difference between the collected temperature data and the set value is lower than the preset threshold, a control command is generated to cut off the power supply to the fan coil unit and the electric two-way valve; otherwise, a control command is generated to turn on the power supply to the fan coil unit and the electric two-way valve.

5. The control method for fan coil units in public areas of buildings according to claim 4, characterized in that, The valve opening and closing threshold is generated based on the current operating conditions and historical data, and the specific formula is as follows: ； ； in, To preset the target temperature, The historical highest temperature is represented by γ, which is the adaptive coefficient for operating conditions, dynamically adjusted according to seasonal and regional heat load. t is the time difference between the current moment and the historical extreme value recording time, and τ is the time constant. This is the lowest temperature in history.

6. A control system for fan coil units in a building's public area, characterized in that, include: The power circuit module is used to draw the power supply of the fans and electric two-way valves of multiple fan coil units in the same public area from the same power circuit of the floor distribution box. The building control system module is connected to the power circuit module and is used to control the power circuit according to control commands to realize centralized start-up and shutdown and temperature control of multiple fan coil units in the same public area; A temperature sensor module is installed in the same public area to detect the temperature data of the public area; A control command generation module is set within the building control system module and is used to generate control commands based on the temperature data detected by the temperature sensor module. The electric two-way valve control module is connected to the building control system module and is used to control the opening and closing of the electric two-way valve of the fan coil unit according to the control command to achieve temperature control.

7. A computing device, characterized in that, The method includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the control method for fan coil units in a common area of ​​a building as described in any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, which, when executed by a processor, implements the steps of the control method for fan coil units in the common areas of a building as described in any one of claims 1-5.

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