Method and device for controlling electronic expansion valve

A technology of electronic expansion valve and control method, which is applied in heating and ventilation control systems, refrigerators, heating methods, etc., can solve the problems of complicated control methods of electronic expansion valve, etc.

Active Publication Date: 2016-12-07
QINGDAO HISENSE HITACHI AIR CONDITIONING SYST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In summary, in the prior art, the opening control of the electronic expansion valve needs to set different algorithms and control strategies according to the different working modes of the air conditioner, th

Method used

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  • Method and device for controlling electronic expansion valve
  • Method and device for controlling electronic expansion valve
  • Method and device for controlling electronic expansion valve

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] like figure 1 As shown, the air conditioner involved in the embodiment of the present invention is composed of a compressor 11, a four-way reversing valve 12, an outdoor heat exchanger 13, an electronic expansion valve 14, an indoor heat exchanger 15, and a liquid accumulator 16. The connection relationship Figure can refer to figure 1 The schematic diagram of the structure of the air conditioner is shown. Wherein, the electronic expansi...

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Abstract

The embodiment of the invention provides a method and a device for controlling an electronic expansion valve, relates to the field of air conditioners, and aims at realizing accurate control over opening of the electronic expansion valve under different working modes. The solution is applied to an air conditioner, and the air conditioner includes the electronic expansion valve used for throttling refrigerating fluid; the method comprises the following steps: according to a current working mode of the air conditioner, determining an opening threshold value of the electronic expansion valve; determining target opening of the current period of the electronic expansion valve according to the opening threshold value and opening of the electronic expansion valve within the previous period of the current period; and when the target opening is not less than minimum opening, determined according to exhaust temperature and/or suction pressure of a compressor in the air conditioner within the current period, of an opening interval of the electronic expansion valve, regulating the opening of the electronic expansion valve to the target opening. The method and the device provided by the invention are applied to the air conditioner.

Description

technical field [0001] The invention relates to the field of air conditioning, in particular to a method and device for controlling an electronic expansion valve. Background technique [0002] The air conditioner (heat pump) can effectively realize indoor cooling and heating, and provide a comfortable indoor environment. The electronic expansion valve is one of the key components in the air conditioner. Usually, the controller in the air conditioner controls the temperature, pressure and flow of the refrigerant by controlling the opening of the electronic expansion valve, so as to ensure the normal operation of the air conditioner. . [0003] Usually: when the air conditioner is in the stable operation mode, the controller in the air conditioner needs to smoothly adjust the opening of the electronic expansion valve to provide a stable change in the supply air temperature for the room. At this time, the controller controls the cycle of the electronic expansion valve When th...

Claims

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Application Information

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IPC IPC(8): F25B41/06F25B49/02F24F11/00F25B41/34
CPCF24F11/30F24F11/62F24F11/70F25B49/02F24F11/84F24F11/65F25B2600/2513F25B41/31Y02B30/70
Inventor 刘敏曹锐宋敏邓玉平罗晴
Owner QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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