CN-121977266-A - Fan coil control method and device and electronic equipment

CN121977266ACN 121977266 ACN121977266 ACN 121977266ACN-121977266-A

Abstract

The application provides a fan coil control method, a fan coil control device and electronic equipment. The method comprises the steps of obtaining the current cold load demand of a target area, adjusting the opening of the chilled water electric valve according to the chilled water supply and return water temperature difference under the condition that the current cold load demand is smaller than or equal to a first preset threshold value, and adjusting the opening of the chilled water electric valve according to the return air temperature under the condition that the current cold load demand is larger than the first preset threshold value. The application adopts an energy-saving mode when in low load and adjusts the opening of the valve according to the temperature difference of the supplied water to realize large-temperature-difference and small-flow operation, thereby remarkably reducing the energy consumption of the water pump and the fan, adopts a comfortable mode when in high load and rapidly adjusts the opening of the valve according to the return air temperature to ensure the stability and the comfort of the indoor temperature. On the other hand, the application reduces frequent adjustment of the system caused by temperature fluctuation in low load by taking the temperature difference of the water supply and return as a control parameter, thereby reducing equipment abrasion.

Inventors

LI DAPENG
WU SHUSHENG
ZHAO HUI
Liu xikang

Assignees

广州城投综合能源投资经营管理有限公司

Dates

Publication Date: 20260505
Application Date: 20260108

Claims (8)

1. A method of controlling a fan coil, comprising: Acquiring the current cold load demand of a target area; under the condition that the current cold load demand is smaller than or equal to a first preset threshold value, starting an energy-saving mode, and adjusting the opening of the chilled water electric valve according to the chilled water supply return water temperature difference; And under the condition that the current cold load demand is greater than a first preset threshold value, starting a comfort mode, and adjusting the opening of the chilled water electric valve according to the return air temperature.
2. The fan coil control method of claim 1, wherein adjusting the chilled water motor valve opening in accordance with the chilled water supply return water temperature differential comprises: Collecting the water supply temperature and the backwater temperature of all fan coils in a target area in real time; Determining the temperature difference of the water supply and return of the corresponding fan coil according to the water supply temperature and the water return temperature; And comparing the temperature difference of the supplied water and the returned water of each fan coil with a preset temperature difference threshold value, and adjusting the opening of the frozen water electrolysis regulating valve by utilizing a PID control strategy according to the comparison result.
3. The fan coil control method of claim 2, wherein comparing the temperature difference of the supply water back to each fan coil with a preset temperature difference threshold value, and adjusting the opening of the chilled water power control valve by using a PID control strategy according to the comparison result comprises: Comparing the temperature difference of the supply water and the return water of each fan coil with a preset temperature difference threshold value to determine a target temperature difference; And under the condition that the target temperature difference is smaller than or equal to a second preset threshold value, gradually opening the chilled water electric regulating valve by utilizing a PID control strategy to increase the chilled water flow, and under the condition that the target temperature difference is larger than the second preset threshold value, opening the chilled water electric regulating valve to reduce the chilled water flow.
4. The fan coil control method of claim 1, wherein said adjusting the chilled water motor valve opening in response to the return air temperature comprises: Collecting the return air temperature and the indoor temperature of all fan coils in a target area in real time; preprocessing the return air temperature of all fan coils to determine an optimal control value; And comparing the optimal control value with the indoor temperature, and adjusting the opening of the frozen water electric regulating valve by utilizing a PID control strategy according to the comparison result.
5. The fan coil control method of claim 4, wherein comparing the optimal control value to the indoor temperature and adjusting the opening of the chilled water power regulating valve using a PID control strategy based on the comparison result comprises: When the optimal control value is smaller than or equal to the indoor temperature, closing the opening of the chilled water electric valve by utilizing a PID control strategy so as to reduce the flow rate of chilled water; and under the condition that the optimal control value is larger than the indoor temperature, opening the chilled water electric valve to increase the flow rate of the chilled water.
6. The fan coil control method of claim 4, wherein the pre-processing the return air temperatures of all fan coils to determine an optimal control value comprises: screening abnormal values of the return air temperatures of all fan coils, and eliminating the abnormal return air temperatures; and determining an optimal control value for the return air temperature after the abnormal value is removed by adopting a median filtering sorting method.
7. A fan coil control apparatus comprising: an acquisition unit for acquiring a current cooling load demand of the target area; the energy-saving control unit is used for starting an energy-saving mode and adjusting the opening of the chilled water electric valve according to the chilled water supply and return water temperature difference under the condition that the current cold load demand is smaller than or equal to a first preset threshold value; And the comfort control unit is used for starting a comfort mode under the condition that the current cold load demand is greater than a first preset threshold value, and adjusting the opening of the chilled water electric valve according to the return air temperature.
8. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements the fan coil control method of any of claims 1 to 6 when the program is executed by the processor.

Description

Fan coil control method and device and electronic equipment Technical Field The invention relates to the technical field of heating ventilation air conditioning regulation and control, in particular to a fan coil control method and device and electronic equipment. Background The fan coil unit is used as integrated air conditioning equipment integrating components such as a fan, a heat exchanger, a filter and the like, is widely applied to various scenes such as public buildings, data centers and the like by virtue of the advantage of flexible deployment, has the core functions of adjusting the state of a chilled water electric valve through return air temperature feedback, realizes accurate control of indoor temperature, and is a key terminal equipment in a heating ventilation air conditioning system. In the prior art, only the return air temperature is used as a control basis, so that the direct influence of the temperature difference of the chilled water supply and return water on the energy consumption of the system is ignored, and the cold energy distribution is unbalanced and the energy consumption is increased. Especially under the less operating mode of cold load demand, the chilled water motor valve is liable to be in the overshoot state for a long time, and the cold water supply pump maintains high-load operation, causes apparent energy waste. Disclosure of Invention The invention provides a fan coil control method and device, which are used for solving the defects of unbalanced cold distribution and increased energy consumption in the prior art. The invention provides a fan coil control method, which comprises the following steps: Acquiring the current cold load demand of a target area; under the condition that the current cold load demand is smaller than or equal to a first preset threshold value, starting an energy-saving mode, and adjusting the opening of the chilled water electric valve according to the chilled water supply return water temperature difference; And under the condition that the current cold load demand is greater than a first preset threshold value, starting a comfort mode, and adjusting the opening of the chilled water electric valve according to the return air temperature. According to the fan coil control method provided by the invention, the opening adjustment of the chilled water electric valve according to the chilled water supply and return water temperature difference comprises the following steps: Collecting the water supply temperature and the backwater temperature of all fan coils in a target area in real time; Determining the temperature difference of the water supply and return of the corresponding fan coil according to the water supply temperature and the water return temperature; And comparing the temperature difference of the supplied water and the returned water of each fan coil with a preset temperature difference threshold value, and adjusting the opening of the frozen water electrolysis regulating valve by utilizing a PID control strategy according to the comparison result. According to the fan coil control method provided by the invention, the comparison of the temperature difference of the supply water and the return water of each fan coil with the preset temperature difference threshold value, and the adjustment of the opening of the frozen water and electricity regulating valve by utilizing the PID control strategy according to the comparison result comprises the following steps: Comparing the temperature difference of the supply water and the return water of each fan coil with a preset temperature difference threshold value to determine a target temperature difference; And under the condition that the target temperature difference is smaller than or equal to a second preset threshold value, gradually opening the chilled water electric regulating valve by utilizing a PID control strategy to increase the chilled water flow, and under the condition that the target temperature difference is larger than the second preset threshold value, opening the chilled water electric regulating valve to reduce the chilled water flow. According to the fan coil control method provided by the invention, the step of adjusting the opening of the chilled water electric valve according to the return air temperature comprises the following steps: Collecting the return air temperature and the indoor temperature of all fan coils in a target area in real time; preprocessing the return air temperature of all fan coils to determine an optimal control value; And comparing the optimal control value with the indoor temperature, and adjusting the opening of the frozen water electric regulating valve by utilizing a PID control strategy according to the comparison result. According to the fan coil control method provided by the invention, the optimal control value is compared with the indoor temperature, and according to the comparison result, the opening degree of the frozen water electri