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A screw unit control method, device and air conditioning unit

A technology of screw unit and control method, which is applied in the direction of mechanical equipment, etc., can solve problems such as the inability to guarantee the stable operation of the screw unit, and achieve the effect of improving the service life and user experience

Active Publication Date: 2022-02-18
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a screw unit control method, device and air conditioning unit to solve the existing problem that the screw unit cannot be guaranteed to operate stably at low temperature

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  • A screw unit control method, device and air conditioning unit
  • A screw unit control method, device and air conditioning unit
  • A screw unit control method, device and air conditioning unit

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Embodiment Construction

[0046] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in the present application, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present application.

[0047] Such as figure 1 As shown, the embodiment of the present invention provides an air-cooled screw unit; the following embodiments all take the air-cooled screw unit as an example for illustration. In the figure, the air-cooled screw unit includes a refrigeration cycle and a terminal device 6. The refrigeration cycle includes a compressor 4, a heat exchanger 2, a frequency conversion fan 1, an expansion valve 3 ...

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Abstract

The invention discloses a control method and device of a screw unit and an air-conditioning unit, belonging to the field of control of the screw unit. The control method includes: when the unit is in a low-temperature refrigeration mode, acquiring the ambient temperature where the unit is located, the low-pressure pressure of the compressor in the unit, and the outlet water temperature. Control the frequency of compressors and fans in the unit according to these obtained parameters. This application scheme controls the frequency of the compressor and fan in the unit by obtaining the working parameters of the unit during low-temperature refrigeration, which solves the problem of frequent startup and shutdown of the compressor when the ambient temperature is low, and ensures the stable operation of the unit when the ambient temperature is low. It can improve the service life of the unit and the user experience.

Description

technical field [0001] The invention relates to the control technology of the screw unit, in particular, to a control method and device for the screw unit and an air conditioner unit. Background technique [0002] When the ambient temperature is low, the screw compressor is in the low-temperature refrigeration mode. At this time, low-pressure standby is prone to occur, resulting in unstable operation of the unit and affecting the service life of the unit and user experience. There is currently a control method to control the frequency of the compressor through the indoor and outdoor temperature difference. However, for units that are all outdoors, such as air-cooled screw units, the temperature difference between indoor and outdoor cannot be used to control the frequency of the compressor, so the existing control methods cannot guarantee the stable operation of the screw unit at low temperatures. Contents of the invention [0003] In order to overcome the deficiencies of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/70F24F11/64F24F11/61
Inventor 路朋博程琦刘思源李娜陈培生
Owner GREE ELECTRIC APPLIANCES INC
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