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Self-adaptation control method for multi-split indoor unit valve and multi-split air conditioner

An adaptive control and multi-connected air-conditioning technology, applied in air-conditioning systems, applications, heating methods, etc., can solve problems such as high risk of liquid return, unfavorable system stable operation, repeated fluctuations in pipe temperature, etc.

Active Publication Date: 2019-11-05
NINGBO AUX ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The problem solved by the present invention is that the tube temperature of the internal unit of the multi-split air conditioner fluctuates repeatedly, which is not conducive to the stable operation of the system, and the risk of liquid return is relatively high

Method used

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  • Self-adaptation control method for multi-split indoor unit valve and multi-split air conditioner
  • Self-adaptation control method for multi-split indoor unit valve and multi-split air conditioner
  • Self-adaptation control method for multi-split indoor unit valve and multi-split air conditioner

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Embodiment Construction

[0040] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0041] In the existing internal machine valve control method, the target superheat is a fixed value. Under most loads, the opening of the internal machine valve will be unstable, resulting in repeated fluctuations in the pipe temperature of the internal machine, which is not conducive to the stable operation of the system. , a problem with a greater risk of liquid return.

[0042] see figure 1 In view of the above-mentioned defects in the prior art, this embodiment provides a method for adaptive control of multi-connected internal machine valves, including the following steps:

[0043] S1: Obtain the maximum value PMV of the opening of the internal machine valve in the preset period max and minimum PMV min , and the maximum value of sup...

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Abstract

The invention provides a self-adaptation control method for a multi-split indoor unit valve and a multi-split air conditioner, and relates to the technical field of air conditioners. The self-adaptation control method for the multi-split indoor unit valve comprises the steps that when the indoor unit valves repeatedly fluctuates, if the delta T standard 1 is smaller than or equal to delta T and larger than or equal to T0, the indoor unit valve is controlled to operate under the standard opening degree PMV1; and if delta T is smaller than or equal to the delta T standard 1 and larger than or equal to T0 or delta T is smaller than T0, the indoor unit valve is controlled to operate under the corrected opening degree PMV2, wherein delta T is the mean value of the maximum value delta Tmax and the minimum value delta Tmin of the superheat degree in the preset period, the delta T standard 1 is the standard superheat degree of the indoor unit valve operating under the standard opening degree PMV1, T0 is the safety superheat degree, and PMV2 is larger than PMV1.The opening degree of the indoor unit valve controlled through the method is more reasonable, the reliability is better, and the opening degree adjusting stability of the indoor unit valve and the pipe temperature stability of an indoor unit can be guaranteed; and stable system operation is benefited, and the risk of liquid return is reduced.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a multi-connected internal unit valve self-adaptive control method and a multi-connected air conditioner. Background technique [0002] Multi-connected air conditioner is a type of user's central air conditioner, commonly known as "one-to-many", which means that one outdoor unit is connected to two or more indoor units through piping. Primary refrigerant air conditioning system in the form of evaporative heat exchange. Multi-connected air conditioners are increasingly widely used in small and medium-sized buildings and some public buildings. [0003] At present, the valve control of the indoor unit of the multi-split air conditioner is generally controlled by the target superheat degree. However, during low-load operation, due to the small opening of the internal unit valve, the adjustment range is small, and it is easy to fluctuate, resulting in repeated fluctuations i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/64F24F11/84F24F3/06
CPCF24F3/065F24F11/64F24F11/84
Inventor 陈东任小辉吉金浩
Owner NINGBO AUX ELECTRIC
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