Control method for complete machine capability of variable-capacity multi-connected unit and control system therefor

A control method and multi-connection technology, applied in heating and ventilation control systems, heating and ventilation safety systems, refrigerators, etc., can solve the problems of variable-capacity multi-connection downtime and failure to satisfy users, and achieve good cooling effect

Active Publication Date: 2009-12-02
HAIER GRP CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After starting again, the same fault alarm will still appear, which will eventually lead to the shutdown of variable capacity multi-connection, which cannot meet the needs of users

Method used

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  • Control method for complete machine capability of variable-capacity multi-connected unit and control system therefor
  • Control method for complete machine capability of variable-capacity multi-connected unit and control system therefor
  • Control method for complete machine capability of variable-capacity multi-connected unit and control system therefor

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Embodiment Construction

[0034] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] The variable capacity multi-line adopts single or multiple compressors, and a pressure relief valve and a liquid spray cooling valve are installed in the system. According to the ambient temperature and the load of the indoor unit, the number of compressors to be turned on is automatically adjusted; the exhaust pressure is monitored, and combined with the opening or closing of the pressure relief valve and the liquid spray cooling valve, the adjustment of the output of variable capacity and multi-connection capacity is realized. Due to the change of ambient temperature, the exhaust pressure is too high to cause the phenomenon of variable capacity multi-line alarm shutdown, so as to achieve good cooling and heating effects.

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Abstract

The invention discloses a control method for complete machine capability of a variable-capacity multi-connected unit, comprising the followings: according to the working mode, indoor unit load and environmental temperature of the variable-capacity multi-connected machine, determining the number of compressors to be started and whether to start relief valves; monitoring whether exhaust pressure is larger than a set value, if so, according to the number of the started the compressors, the situation whether to start the relief valves and the failure frequency of the variable-capacity multi-connected unit, redetermining the number of the variable-capacity multi-connected unit and whether to start the relief valves and/or diluent cooling valves. The invention also discloses a control system for complete machine capability of the variable-capacity multi-connected unit, comprising an outdoor unit, the indoor unit, compressors, relief valves and diluent cooling valves, further comprising a control module, a monitoring module and a correcting module. In the invention, by monitoring exhaust pressure to automatically alter complete machine capability output, phenomena of overhigh exhaust pressure and system alarm halt caused by environment temperature variation do not occur, thus achieving good cooling and heating effects.

Description

technical field [0001] The invention relates to the technical field of air-conditioning control, in particular to a control method and system for variable-capacity multi-connection complete machine capability. Background technique [0002] The variable-capacity multi-line unit uses a pressure relief valve to realize the variable-capacity output of the compressor to meet the needs of different loads of the indoor unit. Due to its simple structure, low cost and convenient maintenance, variable capacity multi-connectors are widely used in the market. [0003] see figure 1 , a single compressor variable capacity multi-line system diagram. Including compressor 101, pressure relief valve 102, spray liquid cooling valve 103, gas-liquid separator 104, throttling device electronic expansion valve 105, high pressure liquid receiver 106, condenser 107, four-way valve 108, high pressure switch 109 and low pressure Switch 110. The pressure relief valve 102 is used to change the press...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00F25B49/02
Inventor 国德防涂虬毛守博丛辉
Owner HAIER GRP CORP
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