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Cold quantity combination control method and device for constant-frequency air-conditioning unit

An air-conditioning unit and combined control technology, applied in heating and ventilation control systems, heating methods, mechanical equipment, etc., can solve problems such as affecting the life of the compressor, and achieve the effect of improving the service life and avoiding starting and stopping.

Active Publication Date: 2015-04-29
GREE ELECTRIC APPLIANCES INC
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  • Abstract
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Problems solved by technology

[0007] The main purpose of the present invention is to provide a cooling combination control method and device for a fixed-frequency air-conditioning unit, so as to solve the problem that the frequent start and stop of the compressor affects the life of the compressor when the cooling combination control is performed on the fixed-frequency air-conditioning unit

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  • Cold quantity combination control method and device for constant-frequency air-conditioning unit
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  • Cold quantity combination control method and device for constant-frequency air-conditioning unit

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[0029] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0030] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0031] It should be noted that the terms "first" and "second" in ...

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Abstract

The invention discloses a cold quantity combination control method and a cold quantity combination control device for a constant-frequency air-conditioning unit. The method comprises the following steps: determining a cold quantity combination value set of the constant-frequency air-conditioning unit; detecting the current cold quantity combination value of the constant-frequency air-conditioning unit; detecting the temperature or return air of the constant-frequency air-conditioning unit; judging whether the temperature of the return air is greater than a first preset threshold value; if the temperature of the return air is greater than the first preset threshold value, adjusting the cold quantity combination value of the constant-frequency air-conditioning unit from the current cold quantity combination value to the cold quantity combination value, which is closest to the current cold quantity combination value, of a plurality of cold quantity combination values. Through the method and the device, the problem that the service life of a compressor is influenced by starting and stopping the compressor frequently when the constant-frequency air-conditioning unit is subjected to the cold quantity combination control is solved, so that the cold quantity combination value of the constant-frequency air-conditioning unit is adjusted from the current cold quantity combination value to the cold quantity combination value, which is closest to the current cold quantity combination value, of a plurality of cold quantity combination values when the temperature of the return air is greater than the first threshold value; therefore, the effect of prolonging the service life of the unit is achieved.

Description

technical field [0001] The invention relates to the field of air conditioning, in particular to a cooling capacity combination control method and device for a fixed frequency air conditioning unit. Background technique [0002] At present, the load control of multi-system fixed-frequency air-conditioning units is mainly based on the temperature difference Δt between the return air temperature and the set temperature to control the start and stop of the compressor (according to the principle of "first start, first stop, first stop, first start"), Adjust the output cooling capacity to meet the actual load demand, so as to meet the requirements of controlling the return air temperature. [0003] For example, the load control method of the existing multi-system fixed-frequency air-conditioning unit is as follows: [0004] When Δt>1°C, turn on compressor A (the compressor with the longest stop time is turned on), if the cooling capacity combination of the running compressors ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00
CPCF24F11/30F24F11/52
Inventor 石伟黄章义徐美俊陈培生于宗伟王朴忠唐育辉刘鸣
Owner GREE ELECTRIC APPLIANCES INC
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