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Screw unit control method and device and air conditioning unit

A technology of screw unit and control method, applied in the direction of mechanical equipment, etc., can solve the problem that the stable operation of the screw unit cannot be guaranteed.

Active Publication Date: 2021-04-16
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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  • Screw unit control method and device and air conditioning unit
  • Screw unit control method and device and air conditioning unit
  • Screw unit control method and 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] like 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 and...

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Abstract

The invention discloses a screw unit control method and device and an air conditioning unit, and belongs to the field of screw unit control. The screw unit control method comprises the steps that when the unit is in a low-temperature refrigeration mode, the environment temperature of the unit, the low-pressure pressure of a compressor in the unit and the water outlet temperature are obtained; and the frequencies of the compressor and a fan in the unit are controlled according to the acquired parameters. According to the scheme, the frequencies of the compressor and the fan in the unit are controlled by obtaining the working parameters of the unit during low-temperature refrigeration, the problem that the compressor is frequently started and stopped when the environment temperature is low is solved, it is guaranteed that the unit stably operates when the environment temperature is low, the service life of the unit can be prolonged, and user experience can be improved.

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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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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