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Car air conditioning system electronic expansion valve control method

An automotive air-conditioning system and electronic expansion valve technology, which is applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of limited mileage and limited battery capacity of automobiles, so as to improve service life, reduce action range and frequency, The effect of avoiding excessive movement

Active Publication Date: 2013-04-10
ZHEJIANG SANHUA AUTOMOTIVE COMPONENTS CO LTD
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Problems solved by technology

Especially in electric vehicle systems, the range of the car is limited due to the limited capacity of the battery

Method used

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  • Car air conditioning system electronic expansion valve control method
  • Car air conditioning system electronic expansion valve control method
  • Car air conditioning system electronic expansion valve control method

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no. 1 example

[0036] Compared with the first embodiment, this solution has made two optimizations.

[0037] First, step S02 is executed before step S1 is executed: on the condition that the rotation speed of the compressor meets the requirement of maintaining the first length of time in the corresponding operation interval, step S1 is executed to determine the opening and closing of the electronic expansion valve according to the rotation speed of the compressor. Preset amount s 0 .

[0038] As mentioned above, the rotation speed of the compressor may change at any time due to some reason. In order to avoid too fast action of the expansion valve, resulting in too frequent control and too large fluctuation of the low pressure of the system, therefore, compared with the first embodiment, this The added step S02 of the plan can avoid the fluctuation of the compressor speed causing the electronic expansion valve to operate frequently and make the system fluctuate too much, thereby effectively ...

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Abstract

The invention discloses a car air conditioning system electronic expansion valve control method. Pre-adjustment value s0 of the valve opening of the electronic expansion valve is determined by the rotating speed of a compressor. Actual degree of superheat Tsh is calculated according to temperature and pressure of refrigerant of an outlet of an evaporator or an inlet of the compressor. The actual degree of superheat is compared with a presupposed interval of threshold values of the degree of superheat to obtain delta s. Control signals s of the adjustment valve opening are output to a controlling end of the electronic expansion valve after the pre-adjustment value of the valve opening is accumulated with valve opening adjustment increment. The car air conditioning system electronic expansion valve control method ensures that the valve opening of the electronic expansion valve arrives a condition according to default of the range of the threshold values of the degree of superheat to reduce adjustment ranges in a stage of adjustment of the degree of superheat, avoids frequent motions of the electronic expansion valve, prolongs service life of the electronic expansion valve, and further reduces system low-pressure pressure fluctuation, reduces energy consumption of the system and ensures normal and high-efficient operation of the system.

Description

technical field [0001] The invention relates to refrigeration control technology, in particular to a method for controlling an electronic expansion valve of an automobile air-conditioning system. Background technique [0002] As we all know, in the automobile system, the automobile air conditioner is the main energy consumption unit. With the improvement of the energy saving requirements of the whole vehicle, the energy saving of the automobile air conditioner is also gradually proposed. Especially in electric vehicle systems, the cruising range of the car is limited due to the limited capacity of the battery. Therefore, the energy saving of electric vehicle air conditioners is particularly important. [0003] In the automotive air-conditioning system, the key to energy saving of the system is to effectively control the flow of refrigerant in the system so that the system can play the best performance. Specific to electric vehicle air conditioners, since the compressor can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02
Inventor 张荣荣爱德文·约翰·斯坦科唐立席卫东
Owner ZHEJIANG SANHUA AUTOMOTIVE COMPONENTS CO LTD
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