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Control method and air conditioner for electronic expansion valve of two-stage compression intermediate air supply system

An electronic expansion valve and intermediate air supply technology, which is applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of affecting the mass flow rate of refrigerants and making it difficult to achieve stable operation of the system, and achieve the effect of stability control

Active Publication Date: 2018-12-07
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology

In this control method, since the low-pressure stage electronic expansion valve not only affects the mass flow rate of refrigerant flowing through the evaporator, but also affects the mass flow rate of refrigerant flowing through the supplementary gas branch, it is difficult to achieve stable operation of the system using this control method

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  • Control method and air conditioner for electronic expansion valve of two-stage compression intermediate air supply system
  • Control method and air conditioner for electronic expansion valve of two-stage compression intermediate air supply system
  • Control method and air conditioner for electronic expansion valve of two-stage compression intermediate air supply system

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0021] Such as figure 1 and figure 2 As shown, the embodiment of the present invention provides a method for controlling the electronic expansion valve of the two-stage compression intermediate supplementary air system, including the following steps:

[0022] Step 1. Set the target value T of the first parameter 1s , the target value T of the second parameter 2S , the first difference ΔT 1 and the second difference ΔT 1 .

[0023] Step 2. Obtain the actual value T of the first parameter 1 and the actual value T of the second parameter 2 .

[0024] Step 3. Compare|T 1s -T 1 |with the first difference ΔT 1 and adjust the opening of the high-pressure stage electronic expansion valve according to the comparison result of the first parameter and the variation of the first parame...

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Abstract

The invention discloses a control method of an electronic expansion valve of a two-stage compression intermediate air supply system and an air conditioner. The control method of the electronic expansion valve of the two-stage compression intermediate air supply system includes the following steps: Step 1. Setting the target value of the first parameter T1s, the target value T2S of the second parameter, the first difference ΔT1 and the second difference ΔT1; step 2, obtain the actual value T1 of the first parameter and the actual value T2 of the second parameter; step 3, compare |T1s‑T1 | and the first difference ΔT1, and adjust the opening of the high-pressure stage electronic expansion valve according to the comparison result of the first parameter and the variation of the first parameter; compare |T2s‑T2| with the second difference ΔT2 and adjust the opening degree of the low-pressure stage electronic expansion valve according to the comparison result of the second parameter and the variation of the second parameter. By applying the technical scheme of the invention, the stability control of the two-stage compression intermediate air supply system can be realized.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a method for controlling an electronic expansion valve of a two-stage compression intermediate air supply system and an air conditioner. Background technique [0002] In the single-stage compression refrigeration system, there is only one throttling component of the system. At this time, the electronic expansion valve opening of the component is controlled with the exhaust temperature or exhaust superheat as the target parameter, which is relatively easy to achieve stable control. For the two-stage compression intermediate gas supply system, since the system has two-stage throttling, and the two throttling devices have a certain coupling, it is necessary to decouple the selected target parameters of the two-stage throttling devices to be able to effectively control . [0003] In the electronic expansion valve control of the existing two-stage compression intermediate ga...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B41/06F25B49/02F25B41/34
CPCY02B30/70
Inventor 郑波梁祥飞庄嵘
Owner GREE ELECTRIC APPLIANCES INC
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