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A control method system and refrigerator for preventing electronic expansion valve from being blocked and damaged

A technology of electronic expansion valve and control method, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems affecting the reliability and stability of refrigerator operation, small flow area of ​​electronic expansion valve valve port, dirty valve port, etc. problem, to reduce the possibility of dirty blockage, prevent dirty blockage, and improve the cleanliness effect

Active Publication Date: 2018-01-16
HEFEI MIDEA REFRIGERATOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the flow area of ​​the valve port of the electronic expansion valve is small, which is prone to problems such as dirty blockage and valve port damage, which seriously affects the reliability and stability of the refrigerator.

Method used

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  • A control method system and refrigerator for preventing electronic expansion valve from being blocked and damaged
  • A control method system and refrigerator for preventing electronic expansion valve from being blocked and damaged
  • A control method system and refrigerator for preventing electronic expansion valve from being blocked and damaged

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1, such as figure 1 As shown, a control method for preventing dirty blockage and damage of an electronic expansion valve, the electronic expansion valve is arranged in a refrigerant circulation circuit, and the refrigerant circulation circuit also includes a compressor, including the following steps:

[0019] S1: Detect whether the compressor is powered on for the first time, if it is, execute S2, otherwise execute S3;

[0020] S2, control the opening of the electronic expansion valve to the maximum value, and run for T1 time, execute S3;

[0021] S3, control the opening of the electronic expansion valve to a normal value to make it run stably;

[0022] S4, judging whether the internal temperature of the refrigerator box reaches the preset compressor stop temperature, if so, execute S5; otherwise, return to S3;

[0023] S5, control the opening of the electronic expansion valve to the maximum value, and run for T2 time, control the compressor to stop, and close...

Embodiment 2

[0039] Example 2, such as figure 2 As shown, a control system for preventing the electronic expansion valve from being damaged due to dirty blockage, the electronic expansion valve is arranged in the refrigerant circulation circuit, and the refrigerant circulation circuit also includes a compressor, including: a state detection module for detecting the compressor Whether it is powered on for the first time, and send the status detection result to the control module; the temperature detection module is used to detect whether the internal temperature of the refrigerator box reaches the preset compressor shutdown temperature, and send the temperature detection result to the control module; the control module, It is used to control the opening of the electronic expansion valve to the maximum and run for a predetermined time when the compressor is powered on for the first time or the internal temperature of the refrigerator reaches the preset shutdown temperature.

[0040] The con...

Embodiment 3

[0046] Example 3, such as image 3 As shown, the present invention provides a refrigerator, including the control system for preventing the electronic expansion valve from being blocked and damaged by the second embodiment. The refrigerant circulation loop also includes a condenser and a capillary connected in series between the condenser and the electronic expansion valve.

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Abstract

The invention relates to a control method system and a refrigerator for preventing an electronic expansion valve from being blocked and damaged. The method includes: detecting whether the compressor is powered on for the first time, if so, controlling the opening of the electronic expansion valve to a maximum value, and running for T1 time, otherwise controlling the opening of the electronic expansion valve to a normal value to make it run stably; judging Whether the internal temperature of the refrigerator box reaches the preset compressor shutdown temperature. When it reaches the compressor shutdown temperature, control the opening of the electronic expansion valve to the maximum value, and run for T2 time to control the compressor shutdown and close the electronic expansion valve. The invention adjusts the opening of the electronic expansion valve when it is powered on for the first time and every time the compressor is shut down, so as to reduce impurities at the valve port of the electronic expansion valve and prevent the electronic expansion valve from being dirty and blocked and damaged at the valve port.

Description

technical field [0001] The invention relates to the field of electrical control, in particular to a control for preventing electronic expansion valve from being blocked and damaged. Background technique [0002] At present, the refrigerator industry is developing in the direction of large volume and intelligence, but most refrigerators still use the most primitive capillary tube as the throttling device. Capillary tubes have poor adjustment ability under variable working conditions, and the system refrigerant flow adjustment range is small. Especially the emergence of smart refrigerators puts forward higher requirements for the adjustability and functional diversity of the refrigerator system. Traditional capillary tubes are not good enough. meet the requirements. Therefore, the emergence of refrigerators using electronic expansion valves has been promoted. [0003] However, the flow area of ​​the valve port of the electronic expansion valve is small, which is prone to dir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B49/02F25B41/06F25D29/00F25B41/34
CPCF25B49/02F25D29/003F25B2500/04F25B2600/2513F25B41/34F25B41/31Y02B30/70
Inventor 唐学强孟宪春任伟
Owner HEFEI MIDEA REFRIGERATOR CO LTD
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