Improved self-correcting variable parameter fan coil temperature control method and special equipment

Abstract

The invention relates to an improved self-correcting variable parameter fan coil temperature control method and special equipment. The special equipment comprises a coil fan loop, a coil water valve loop, a control panel and a controller, wherein the control panel is internally provided with a temperature setting circuit and a display circuit, the input/output ports of the temperature setting circuit and the display circuit are connected with the I/O ports of the controller directly or by virtue of an RS485 communication interface, the coil fan loop is provided with a direct current brushless fan and a return air temperature sensor, the control input terminal of the direct current brushless fan is connected with one control output terminal of the controller through a serial interface, and the signal output terminal of the return air temperature sensor is connected with one signal input terminal of the controller; and the coil water valve loop is provided with an electric two-way valve, and the control input terminal of the electric two-way valve is connected with two output terminals of the controller. The temperature control equipment disclosed by the invention improves accuracy on fan coil control, has good stability, realizes intelligent regulation management on a fan coil and saves energy.

Description

technical field [0001] The invention relates to a fan coil temperature control device, in particular to an improved self-calibration variable parameter fan coil temperature control method and a special device. It belongs to the technical field of air conditioning equipment. Background technique [0002] With the continuous development of the urban economy, people's pursuit of quality of life is getting higher and higher. Central air conditioners are used in various high-rise and low-rise buildings such as hotels, office buildings, office buildings, hospitals, apartments, and some entertainment venues. The end of the air-conditioning system is equipped with fan coil equipment, which has a certain impact on the energy consumption of the entire air-conditioning system. Controlling this equipment has a certain positive significance for saving energy. According to the survey results of the current use of the terminal equipment of the building air-conditioning system, most of the...

AI Technical Summary

Problems solved by technology

For the traditional water valve control of fan coil units, the electric two-way valve actuator and solenoid valve are mainly used. There are only two states of on and off to adjust, and it is impossible to automatically adjust the flow of cold and hot media. There are shortcomings such as stability in use, noise generated by opening and closing operation, and water hammer noise; for the control of the coil fan, only high, medium, and low wind speed adjustments are available to achieve the adjustment of the ambient temperature in the target area

However, due to the large thermal inertia in the control area, the water valve on-off control of the fan coil unit and the third-speed wind speed adjustment control of the fan will cause large temperature fluctuations

[0003] In terms of system management and energy saving, due to the lack of perfect and effective management and control methods, it is very common for public buildings to set the indoor temperature unreasonably, keep the air conditioner running when there is no one in the room or when the doors and windows are open for a long time; the indoor environment parameters are manually set by the user , the wind speed is manually selected, that is, the operation control of the fan coil unit depends entirely on the user's manual operation

Since the fan coil at the end of the central air-conditioning system basically operates independently, the existing coil fans do not have the function of information transmission, so the system lacks corresponding effective information, so that the control system can only control the fan coil through a simple shutdown control method The operation cannot carry out effective intelligent control and management

[0004] In addition, the thermostat in the prior art only simply controls the third-speed wind speed of the coil fan and the opening and closing state of the water valve, and cannot automatically adjust according to changes in actual parameters, which may easily cause the indoor temperature to be unstable at the control target temperature.

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