Speed regulation control method of condensing fan for year-round refrigeration air-cooled pipeline machine
A technology of condensing fan and control method, which is applied in the field of speed regulation control of condensing fan and condensing fan adjustment and control of year-round refrigeration air-cooled pipeline machines, which can solve problems such as poor reliability and complicated control system of condensing fan, and achieve low cost Effect
Active Publication Date: 2015-09-09
NANJING TICA AIR CONDITIONING CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to solve the problem that the condensing fan control system is complicated and has poor reliability, and to invent a method for controlling the speed of the condensing fan of the year-round refrigeration air-cooled pipeline machine based on the outdoor temperature and the temperature of the outer disk
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[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0034] Such as Figure 1-2 shown.
[0035] A year-round refrigeration air-cooled ducted machine consists of an outdoor unit and an indoor unit, such as figure 1 As shown, compressor 1, outdoor heat exchanger 2, outdoor condensing fan 3, electronic expansion valve 4, liquid valve 5, indoor heat exchanger 6, indoor fan 7, gas valve 8 and gas-liquid separator 9 form a set of closed Circulation system, in order to realize the control to outdoor condensing fan 3, the present invention has installed outdoor ambient temperature sensor 12, outer disk temperature sensor 11 and controller 10, constitutes the start-stop control to condensing fan 3. The outdoor ambient temperature sensor is placed in the environment where the outdoor unit is located, the outer panel temperature sensor is placed in the position of the outdoor heat exchanger panel, and the condensi...
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A speed control method for a condensate fan of an air cooling pipeline machine with a function of full-year refrigeration is characterized by comprising the steps as follows: firstly, a temperature sensor is used for acquiring an outdoor environment temperature and an outer disc temperature, and sending acquired temperature values to a controller, and simultaneously a counter is mounted; and then, after following determination is performed by the controller according to the acquired temperatures and operating time of the counter, the operating state of the condensate fan is adjusted and controlled: under a refrigeration mode, when the outdoor environment temperature is lower than Tc, the condensate fan is subjected to start-stop control so as to achieve the purpose of controlling condensing pressure of an outdoor heat exchanger; the start-stop control of the condensate fan is jointly determined by the environment temperature, the outer disc temperature and the condensate fan operating time; when the condensate fan stops, if the outer disc temperature is higher than T_on and the stopping time of the condensate fan is longer than t_stop, the condensate fan is started; and when the condensate fan operates, if the outer disc temperature is lower than T_off or operating time of an outer fan is longer than t_run, the condensate fan is stopped, and even though the outer disc temperature is higher than T_on at the moment, the outer fan is closed. The speed control method has a simple control system and low control cost, and easy to implement.
Description
technical field [0001] The invention relates to an air-conditioning technology, in particular to a method for adjusting and controlling a condensing fan, in particular to a method for controlling the speed of a condensing fan of a year-round refrigeration air-cooled pipeline machine. Background technique [0002] As we all know, when the outdoor ambient temperature is relatively low and the condensing fan runs at high speed, the condensing pressure of the outdoor heat exchanger will be very low, which will exceed the operating range of the compressor, and the condensing fan needs to be controlled by a speed regulating device. At present, the medium voltage switch is used to control the start and stop of the condensing fan to control the condensing pressure of the unit. Although the cost of this control method is relatively low, the medium voltage switch is connected in series in the switching circuit for starting the condensing fan, because the starting current of the conden...
Claims
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IPC IPC(8): F24F11/02
Inventor 王云利李明程卓明
Owner NANJING TICA AIR CONDITIONING CO LTD
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