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Anomaly detection control method for electronic expansion valves of multi-split air conditioner indoor units

An electronic expansion valve and abnormal detection technology, applied in heating and ventilation control systems, heating methods, mechanical equipment, etc., can solve the problem of inability to determine the leakage of electronic expansion valves, and achieve the effect of reducing the risk of liquid backflow and reducing the effect of the effect.

Active Publication Date: 2019-12-13
NINGBO AUX ELECTRIC
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a multi-connected internal unit electronic expansion valve abnormality detection and control method to solve the technical problem that it is impossible to quickly and accurately judge the faults such as the leakage of the electronic expansion valve

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  • Anomaly detection control method for electronic expansion valves of multi-split air conditioner indoor units

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Embodiment Construction

[0026] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered below.

[0027] A multi-split air conditioning system usually includes an outdoor unit and multiple indoor units. The outdoor unit is equipped with a compressor and a condenser, and the indoor unit is equipped with an electronic expansion valve, an evaporator and various temperature sensors. Specifically, the room temperature sensor is located at a suitable position of the indoor unit to detect the indoor ambient temperature T; the evaporator inlet, the middle of the evaporator, and the evaporator outlet are respectively equipped with temperature sensors to detect the temperature T1 of the evaporator inlet pipe, and the evaporator The middle tube temperature T2 and the evaporator outlet tube temperature T3.

[0028] figure 1 As shown in the figure, it is a flow chart of t...

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Abstract

The invention discloses an anomaly detection control method for electronic expansion valves of multi-split air conditioner indoor units. According to the method, the indoor units with the abnormal electronic expansion valves are preliminarily identified by judging the temperature difference values of coil pipes of the indoor units and the opening degrees of the electronic expansion valves of the indoor units in the refrigerating operation state; after the identified abnormal indoor units are stopped, the electronic expansion valves of the abnormal indoor units are restored and repaired to solve the jamming problem of the electronic expansion valves, and the indoor units with the electronic expansion valves having a leakage problem are further identified through the temperature difference values between the coil pipes of the abnormal indoor units and the environment; and special control is performed on the indoor units with the electronic expansion valves having a leakage problem, so that influence, from the abnormal indoor units, on the effects of other indoor units is reduced, and meanwhile, the liquid return risk is reduced.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a method for abnormal detection and control of electronic expansion valves of multiple indoor units. Background technique [0002] The multi-connected system is a type of central air conditioner for users, commonly known as "one-to-many", which means that one outdoor unit is connected to two or more indoor units through pipes. Primary refrigerant air conditioning system in the form of evaporative heat exchange. Multi-connected systems are currently being increasingly widely used in small and medium-sized buildings and some public buildings. [0003] In the refrigeration system of the multi-connected system, an electronic expansion valve or other auxiliary circuits need to be installed to adjust the flow of refrigerant entering the indoor unit. Since the multi-line system is connected to multiple internal units, the electronic expansion valve of the internal unit leaks ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/38F24F11/36F24F11/52F24F11/63
CPCF24F11/36F24F11/38F24F11/52F24F11/63
Inventor 陈东任小辉吉金浩
Owner NINGBO AUX ELECTRIC
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