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Air conditioner system and out-of-step prevention control method and control device of electronic expansion valve of air conditioner system

A technology of electronic expansion valve and air conditioning system, applied in the direction of mechanical equipment, etc., can solve the problems of not reaching 100%, out of step, inaccurate position, etc., and achieve the effect of improving reliability and reducing the probability of out of step

Active Publication Date: 2018-02-02
CHONGQING MIDEA GENERAL REFRIGERATING EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the stepper motor opens and closes the valve back and forth during the action process, which will cause out of step. Therefore, in the control process, the specific opening and position of the electronic expansion valve cannot be determined, and can only be confirmed based on the open-loop calculation. position, but the position is inaccurate, for example, when calculating the opening degree, it is considered that the current opening degree of the electronic expansion valve is 100%, but due to the stepping motor out of step, the actual opening degree does not reach 100%, resulting in inaccurate adjustment, resulting in system instability

Method used

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  • Air conditioner system and out-of-step prevention control method and control device of electronic expansion valve of air conditioner system
  • Air conditioner system and out-of-step prevention control method and control device of electronic expansion valve of air conditioner system

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Embodiment Construction

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0027] The out-of-step control method for the electronic expansion valve in the air-conditioning system, the out-of-step control device for the electronic expansion valve in the air-conditioning system, and the air-conditioning system with the control device are described below with reference to the accompanying drawings.

[0028] figure 1 It is a flow chart of an out-of-step control method for an electronic expansion valve in an air conditioning system according to an embodiment of the present invention.

[0029] Such as figur...

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Abstract

The invention discloses an air conditioner system and an out-of-step prevention control method and control device of an electronic expansion valve of the air conditioner system. The out-of-step prevention control method comprises the following steps that in the action process of the electronic expansion valve, the needed changing step number of the electronic expansion valve is acquired; whether the needed changing step number is smaller than preset minimum adjustment step number or not is judged; if the needed changing step number is smaller than the preset minimum adjustment step number, theelectronic expansion valve is forbidden to act, the needed changing step numbers are accumulated, when the accumulated step number is larger than or equal to the preset minimum adjustment step number, the electronic expansion valve is controlled to act, and the accumulated step number is subjected to zero clearing; and if the needed changing step number is larger than or equal to the preset minimum adjustment step number, the electronic expansion valve is directly controlled to act. By means of the control method, the electronic expansion valve can be finely adjusted according to the size ofthe needed changing step number of the electronic expansion valve, frequent action is not needed, the probability of out of step is greatly reduced, and the reliability of system running is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an out-of-step control method for an electronic expansion valve in an air-conditioning system, an out-of-step control device for an electronic expansion valve in an air-conditioning system, and an air-conditioning system with the control device. Background technique [0002] The control of the air conditioning system is becoming more and more precise. The system has begun to use electronic expansion valves to achieve precise control of the flow rate. The electronic expansion valve control methods currently used are all open-loop control, which cannot detect the specific position of the electronic expansion valve opening. In order to solve the above problems, in related technologies, when the system is powered on, the electronic expansion valve is closed for a total number of steps, and then a certain number of steps is added to confirm that the reference position has been...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/64F24F11/84
Inventor 王靖
Owner CHONGQING MIDEA GENERAL REFRIGERATING EQUIP
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