Rotation speed control system of condensation fan and control method thereof
A condensing fan and speed control technology, applied in pump control, mechanical equipment, machine/engine, etc., can solve the problem of high fan noise in refrigerators, achieve the effect of improving user experience, reducing noise, and meeting performance requirements
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Embodiment 1
[0028] see figure 1 As shown, the present invention is a rotational speed control system of a condensing fan, including a request receiving module, a selection module and a control module; the request receiving module is connected to the selection module, and the request receiving module transmits the determination request whether the condensing fan is to be turned on to the selection module; the selection module includes an ambient temperature collection unit, a compressor speed collection unit, a judgment unit and a selection unit; the ambient temperature collection unit transmits the collected ambient temperature data to the judgment unit; the compressor speed collection unit collects the collected compressor speed The data is transmitted to the judging unit; the judging unit judges the preset temperature range of the actual ambient temperature and the preset speed range of the current compressor speed, and transmits the data of the actual ambient temperature range and the a...
Embodiment 2
[0032] see figure 2 As shown, a control method for a speed control system of a condensing fan includes the following steps:
[0033] SS01: The compressor is started, and the request receiving module sends a fan judgment request to the selection module;
[0034] SS02: Select the module to judge whether the condensing fan needs to be turned on, and enter SS03 when it needs to be turned on, otherwise end;
[0035] SS03: Select the module to judge the heat dissipation load of the refrigerator condenser, and select the preset target duty cycle of the condensing fan;
[0036] SS04: The control module adjusts the current operating duty cycle of the condensing fan to the preset target duty cycle of the condensing fan.
[0037] Further, in step SS02, the selection module collects the temperature of the environment where the refrigerator is located, and judges whether the condensing fan needs to be turned on according to the current ambient temperature; when the ambient temperature i...
Embodiment 3
[0040] The corresponding relationship between the speed of the condensing fan and the duty cycle is shown in Table 1 below:
[0041] Table 1 Condensing fan speed and duty cycle correspondence table
[0042] gear
S1
S2
S3
S4
S5
S6
duty cycle
30％
35％
40％
45％
50％
55％
Corresponding speed
425
497
562
624
685
746
gear
S7
S8
S9
S10
S11
S12
duty cycle
60％
65％
70％
80％
90％
100％
Corresponding speed
807
868
926
1032
1136
1239
[0043] When the ambient temperature is 33°C and the compressor speed is 3000rpm, according to Table 1, the condensing fan is divided into twelve gears according to the corresponding speed of the operating duty cycle, and each duty cycle corresponds to a preset fan speed; The ambient temperature is divided into six preset temperature sections, and the compressor speed is divided into five preset speed sections. ...
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