Fan control method for modular water chilling unit
A chiller and control method technology, applied in heating and ventilation control systems, heating methods, space heating and ventilation, etc., can solve problems such as not being able to fully utilize fans, and achieve the effects of reducing energy consumption and improving efficiency
Active Publication Date: 2014-04-16
SICHUAN CHANGHONG ELECTRIC CO LTD
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Embodiment
[0020] In this example, the certain period of time is 5 minutes, and the period of time is also 5 minutes.
[0021] Firstly, after the centralized controller and the outdoor unit are powered on and initialized, the system judges whether the operating conditions of the compressor are met. If not, the compressor will be started. If the outdoor temperature is greater than 26 degrees Celsius, the fan will operate at high speed. Start, if it is less than or equal to 26 degrees Celsius, the fan will start at a low speed. After the fan has been running for a certain period of time, judge whether the coil temperature is greater than 38 degrees Celsius. If it is greater than 38 degrees Celsius, continue to judge whether the outdoor temperature is greater than 26 degrees Celsius. Use high speed, if it is less than or equal to 26 degrees Celsius, the fan will use low speed, keep the fan running speed for a period of time and then return to the step of judging the coil temperature, if it i...
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The invention relates to an air-conditioning technique. The invention aims to solve the problem that a traditional fan control method for a modular water chilling unit is not capable of fully utilizing a fan to perform heat exchange. The invention provides a fan control method for a modular water chilling unit, and adopts the technical scheme which can be summarized into the following steps: firstly, after power-up initialization is finished, judging whether the running condition of a compressor is satisfied or not; then, starting the compressor; and judging outdoor temperature; if the outdoor temperature is higher than 26 DEG C, starting the fan at a high speed; if the outdoor temperature is lower than or equal to 26 DEG C, starting the fan at a low speed; after the fan runs for a certain period of time, starting to judge the temperature of a coiler; if the temperature of the coiler is higher than 38 DEG C, selecting the air speed of the fan according to the outdoor temperature; if the temperature of the coiler is lower than 28 DEG C, turning off the fan for standby; if the temperature of the coiler is higher than or equal to 28 DEG C, keeping the current running speed of the fan; and after the fan runs for a certain period of time every time, returning to the step of judging the temperature of the coiler. The fan control method for the modular water chilling unit has the beneficial effects that the heat exchange is performed by fully utilizing the fan. The fan control method for the modular water chilling unit is suitable for fan control of the modular water chilling unit.
Description
technical field [0001] The invention relates to air-conditioning technology, in particular to fan control technology of modular chillers. Background technique [0002] The existing modular chiller includes a centralized controller for the control system and an outdoor unit control unit for controlling the compressor. The centralized controller communicates with the outdoor unit control unit in RS485 mode, and the centralized controller realizes the compression of the outdoor unit through on / off. The start / stop control of the outdoor unit, the fan of the outdoor unit starts when the compressor starts, and the fan also stops running when the compressor stops. The effect of changing the operating speed of the outdoor fan is actually to speed up or slow down the degree of heat exchange of the heat exchanger. . The control method in the prior art is: when the outdoor fan is cooling normally, the compressor and the fan are linked together. Only when the cooling overload occurs, t...
Claims
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IPC IPC(8): F24F11/00
Inventor 刘启武唐婷婷
Owner SICHUAN CHANGHONG ELECTRIC CO LTD