Control method and system for variable frequency variable capacity compressor
A variable-capacity compressor and control method technology, applied in heating and ventilation control systems, heating and ventilation safety systems, refrigerators, etc., can solve the problem of reducing compressors, inaccurate judgment of compressor operation status, and inability to switch in place. Judgment and other issues to achieve the effect of improving reliability
Active Publication Date: 2018-03-06
GREE ELECTRICAL APPLIANCE WUHU +2
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- Application Information
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Problems solved by technology
[0003] The traditional variable frequency variable capacity compressor switches the operating state of single rotor and dual rotor by controlling the operating frequency, but it is impossible to judge whether the switching is in place. The reliability of the control of the operating state
Method used
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Embodiment Construction
[0058] Embodiments of the control method and system of the variable frequency variable capacity compressor provided by the present invention, such as Figure 1 to Figure 3 shown.
[0059] An embodiment of the control method of the variable frequency variable capacity compressor provided by the present invention, such as figure 1 shown, including the following steps:
[0060] S100, detecting the operating frequency of the compressor, and controlling the compressor to switch the operating state according to the magnitude of the operating frequency and the preset switching frequency; the operating state switching includes switching from the single-rotor operating state to the dual-rotor operating state, or from the dual-rotor operating state The state switches to the single-rotor running state;
[0061] S200, detecting the current of the compressor, and judging whether the operation state switching of the compressor is completed according to the current change of the compressor...
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The invention discloses a method and a system for controlling a variable-frequency and capacity-variable compressor. The method comprises the steps of detecting the operating frequency of the compressor, controlling the compressor to switch the operating state according to the operating frequency and the preset switching frequency, detecting the current of the compressor and determining whether the operating state switching of the compressor is completed according to the current change of the compressor before and after the operating state switching, wherein the operating state switching comprises switching from a single-rotor operating state to a double-rotor operating state, or switching from the double-rotor operating state to the single-rotor operating state. The method and the system for controlling the variable-frequency and capacity-variable compressor are capable of accurately determining the operating state of the compressor and improving the reliability of control on the compressor.
Description
technical field [0001] The invention relates to the technical field of air conditioners, in particular to a control method and system for a frequency-variable variable-capacity compressor. Background technique [0002] The variable frequency variable capacity compressor can adjust the operating frequency within a certain range with the change of the load to change the output capacity. When the variable frequency variable capacity compressor runs at high frequency, it performs rapid heating or cooling, and when it runs at low frequency, it reduces the output to achieve the purpose of energy saving. [0003] The traditional variable frequency and variable capacity compressor switches the operating state of single rotor and dual rotor by controlling the operating frequency, but it is impossible to judge whether the switching is in place. The reliability of the control of the operating state. Contents of the invention [0004] Based on this, it is necessary to address the de...
Claims
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IPC IPC(8): F24F11/00F25B49/02
CPCF24F11/30F24F11/62F24F2140/50F25B49/022
Inventor 吕向前胡晰怡孙丰涛孙泉良杨帆
Owner GREE ELECTRICAL APPLIANCE WUHU