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Variable refrigerant flow air conditioning system and defrosting control method thereof

A technology of multi-connected air conditioner and control method, which is applied to the control input involving air characteristics, space heating and ventilation control input, heating and ventilation control system, etc. problems, to achieve the effect of ensuring indoor comfort, shortening the overall defrosting time, and ensuring the reliability of the air conditioning system

Active Publication Date: 2019-01-04
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide a multi-connected air-conditioning system and its defrosting control method, so as to solve the technical problems of the existing outdoor heat exchangers with long overall defrosting time and indoor units with long anti-cold wind time

Method used

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  • Variable refrigerant flow air conditioning system and defrosting control method thereof
  • Variable refrigerant flow air conditioning system and defrosting control method thereof
  • Variable refrigerant flow air conditioning system and defrosting control method thereof

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Embodiment Construction

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations...

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Abstract

The invention belongs to the technical field of air conditioning, and relates to a variable refrigerant flow air conditioning system and a defrosting control method thereof. An outdoor heat exchangeris divided into at least two heat exchange units arranged in parallel from top to bottom, and each heat exchange unit is provided with a temperature sensor and an outdoor unit throttling part. In thedefrosting mode, on the basis of the magnitude relation between the average temperature value of all the heat exchange units and the temperature value of each heat exchange unit, the opening degree ofthe outdoor unit throttling parts corresponding to the heat exchange units is adjusted. Uniform refrigerant flow distribution in the defrosting process of the outdoor heat exchanger is achieved, thedefrosting speed of the middle portion and the defrosting speed of the lower portion of the outdoor heat exchanger are effectively increased, the overall defrosting time and the indoor unit cold air preventing time are shortened, and the indoor comfort and the air conditioning system reliability are ensured.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and more specifically relates to a multi-connected air conditioning system and a defrosting control method thereof. Background technique [0002] With the improvement of multi-connected air conditioner technology, the maximization of multi-connected modules can be greatly promoted and used. The system is huge, the condenser (outdoor heat exchanger) is enlarged and heightened, the number of condenser flow channels is increased, and the refrigerant flow rate of the condenser is increased during defrosting. The split flow is unbalanced, and the middle and lower parts of the condenser are affected by the melt water flowing down from the upper part. The overall defrosting time is longer, and the indoor unit has a longer time to prevent cold wind, which affects indoor comfort and air conditioning system reliability. Contents of the invention [0003] The purpose of the present invention is t...

Claims

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Application Information

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IPC IPC(8): F24F11/89F24F11/00F25B47/02F24F110/10
CPCF24F11/00F25B47/02F24F11/89F24F2110/10
Inventor 李洪生
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD
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