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Air conditioner system control method

An air-conditioning system and control method technology, applied in heating and ventilation control systems, heating and ventilation safety systems, heating methods, etc., can solve the problems of reducing the life of the compressor system, increasing the friction of the compressor, and poor sealing of the compressor. Improve the comfort of use and ensure the effect of service life

Active Publication Date: 2013-10-02
MIDEA GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for R32 refrigerant, the oil used in the compressors in the existing system is PVE oil and POE oil. When PVE oil is used, the miscibility of R32 with it is very poor, and there will be poor oil return when testing the intermediate capacity of refrigeration and heating. In a bad situation, almost all the oil at the bottom of the compressor is taken away, resulting in poor sealing of the compressor and air leakage, and its intermediate capacity is attenuated by about 20%, and the frequency range spans a large range, usually in the range of 40HZ during heating Problem; the miscibility between existing POE oil and R32 is not ideal. In such a system, when the intermediate frequency of refrigeration is running, the oil at the bottom of the compressor will be diluted due to incomplete evaporation of the evaporator, and the diluted oil The sealing effect is not achieved, resulting in the attenuation of the intermediate capacity (attenuation of 30%)
At the same time, there is no oil at the bottom of the compressor or the oil is diluted, which will also increase the friction of the compressor, reduce the life of the compressor and the system, and affect the user experience
[0005] In addition, as R32 is a new type of refrigerant, many tests have not been carried out in detail, and the above phenomenon is difficult to be found. Therefore, a solution is urgently needed to avoid the phenomenon of intermediate capacity attenuation after the R32 system is matched with the existing compressor oil.

Method used

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  • Air conditioner system control method

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Embodiment approach

[0034] As another implementation, the following methods can also be used:

[0035] After the first predetermined time C1 of starting the air conditioner, obtain the temperature difference ΔT1 between the oil temperature TD at the bottom of the compressor and the temperature TL of the condenser; Read △T1 once to get M △T1 values; among them, C1+ C2= C0.

[0036] Specifically, the method of the above-mentioned second embodiment specifically includes:

[0037] Step S101, after the first predetermined time C1 of starting the air conditioner, obtain the temperature difference ΔT1 between the oil temperature TD at the bottom of the compressor and the temperature TL of the condenser; if ΔT1<set value ΔTS, enter step S102; if ΔT1 ≥set value △TS, enter step S103;

[0038] Step S102, read △T1 once per unit time within the second predetermined time C2 to obtain M △T1 values; among them, C1+C2=C0; if the △T1 values ​​exceeding M*a% are greater than the set value △TS, the compressor wil...

specific Embodiment approach

[0058] The 2 cabinets are turned on for refrigeration, and 30 minutes after the compressor starts, △T1 starts to judge for the first time. At this time, the system operating frequency is 28HZ. If △T1≥0 at this time, the compressor maintains the current frequency change law and continues to run After 60 minutes, ΔT1 was measured again. If △T1<0, check △T1 every minute within 15 minutes. If there are 8 △T1 values ​​greater than 0, the compressor will keep running for 60 minutes and then check △T1. Otherwise, the frequency of the compressor will be changed by Increase the frequency from 28HZ to 60HZ, run for 5 minutes, then directly reduce the frequency to 28HZ, and check △T1 again after 25 minutes to complete the cycle judgment.

[0059] Similarly, when the 2-horse cabinet is turned on for heating, 45 minutes after the compressor starts, △T2 starts to judge for the first time. At this time, the system operating frequency is 45HZ. If △T2≥0 at this time, the compressor will mainta...

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Abstract

The invention discloses an air conditioner system control method, which comprises the following steps of after an air conditioner is started for C0, obtaining the temperature difference delta T1 between the bottom oil temperature of M compressors and the temperature of a condenser; when the delta T1 value which exceeds M*a% amount is more than a set value delta TS, enabling the compressors to continuously operate according to the current frequency change rule; judging delta T1 again in every N minutes; otherwise, improving the current frequency of the compressors to the frequency Z1; after the air conditioner is operated for C3, lowering the frequency of the compressors to the previous frequency; operating for C4 to judge the delta T1, and circulating the above steps; if the delta T1 is more than or equal to the set value delta TS, enabling the compressors to operate according to the current frequency change rule; and judging delta T1 again in every N minutes. Therefore, the capacity damping phenomenon of a new refrigerant air conditioner is solved, the use comfort of the new refrigerant air conditioner is improved, and the service life of the compressor is guaranteed.

Description

technical field [0001] The invention relates to the technical field of air-conditioning, in particular to an air-conditioning system control method for avoiding intermediate capacity attenuation after a new refrigerant system is matched with existing compressor oil. Background technique [0002] At present, in the field of air-conditioning and refrigeration technology, most of the R410a refrigerants are used to replace R22, and its advantages are obviously reflected in inverter air conditioners. Against the backdrop of increasing emphasis on addressing global climate change, it will be gradually eliminated. Therefore, at present, we are more focused on researching low-GWP refrigerants represented by R32 and R290. [0003] At the same time, the corresponding compressor research and development is also in progress. Among them, compressor oil, as an indispensable part of air-conditioning system, is getting more and more attention. Especially for R32 refrigerant, various compr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00
Inventor 刘旭刘智勇
Owner MIDEA GRP CO LTD