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A control method and device for an electronic expansion valve

A technology of electronic expansion valve and refrigerant, which is applied in heating and ventilation control systems, refrigerators, heating methods, etc., and can solve problems such as complex control methods of electronic expansion valves

Active Publication Date: 2019-05-14
QINGDAO HISENSE HITACHI AIR CONDITIONING SYST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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, that is, the prior art needs to set two algorithms and control strategies to control the electronic expansion valve. The opening of the valve makes the control method of the electronic expansion valve more complicated

Method used

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  • A control method and device for an electronic expansion valve
  • A control method and device for an electronic expansion valve
  • A control method and device for an 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] Such as 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 expa...

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Abstract

Embodiments of the present invention provide a method and device for controlling an electronic expansion valve, which relate to the field of air conditioning and aim to realize precise control of the opening of the electronic expansion valve in different working modes. This solution is applied to an air conditioner, and the air conditioner includes an electronic expansion valve for throttling refrigerant. The method includes: determining the opening threshold of the electronic expansion valve according to the current working mode of the air conditioner; The opening of the electronic expansion valve in the previous cycle of the cycle determines the target opening of the electronic expansion valve in the current cycle; when the target opening is greater than or equal to the discharge temperature and / or suction pressure of the compressor in the air conditioner in the current cycle The determined minimum opening of the opening range of the electronic expansion valve is used to adjust the opening of the electronic expansion valve to the target opening. The invention is applied to an 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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Patent Type & Authority Patents(China)
IPC IPC(8): F25B41/06F25B49/02F24F11/84F24F11/64F25B41/34
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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