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Multiple online refrigerating oil return noise reduction control method and system

A control method and technology for a control system, which are applied in the field of multi-line refrigeration oil return noise reduction control methods and systems, can solve problems such as influence, and achieve the effect of ensuring the oil return effect and reducing the influence.

Active Publication Date: 2019-04-16
合肥海尔空调电子有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The throttling sound caused by the opening of the electronic expansion valve when the internal unit is not turned on will have an impact on the user, but in the prior art, there is no effective means to reduce this impact

Method used

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  • Multiple online refrigerating oil return noise reduction control method and system
  • Multiple online refrigerating oil return noise reduction control method and system
  • Multiple online refrigerating oil return noise reduction control method and system

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] The multi-connected unit includes an outdoor unit and multiple indoor units. The liquid pipe of each indoor unit is connected to the liquid pipe of the outdoor unit. An electronic expansion valve is installed on the liquid pipe of each indoor unit to adjust the refrigerant flowing into the indoor unit. flow.

[0036] For example, see figure 1 As shown, an electronic expansion valve PMV1 is arranged on the liquid pipe of the indoor unit 1, an electronic expansion valve PMV2 is arranged on the liquid pipe of the indoor unit 2, and an electronic expansion valve PMV3 is arranged on the liquid pipe of the indoor unit 3. An electronic expansion valve PMV4 is arranged on the liquid pipe of the machine 4, an electronic expansion valve PMV5 is arran...

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PUM

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Abstract

The invention discloses a multiple online refrigerating oil return oil reduction method and system. When the accumulative time that the frequency of a compressor is smaller than the set frequency threshold value reaches the oil return cycle and a standby indoor unit exists, the oil return running mode is conducted; the accumulative time is reset; the oil return running time starts to be count; theindoor unit starting load is calculated; the opening degree of an expansion valve of the standby indoor unit is deterred according to the indoor unit starting load and whether people exist in a roomwhere the standby indoor unit is located; the compressor is controlled to run according to the set oil return frequency; and when the oil return running time reaches the oil return set time, the oil return running mode is over, and the normal refrigerating running mode is conducted. By means of the control method, the oil return effect is ensured, and the influences of throttling sounds caused byopening of the expansion valve of the standby indoor unit on users during oil return are also reduced.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to a control method and system for oil return noise reduction of multi-line refrigeration. Background technique [0002] With the improvement of living standards, more and more central air conditioners are favored by more and more families. Now, people pay more and more attention not only to the effect or energy saving, but also to the noise of air conditioners. For the indoor unit, the noise sources are mainly: 1. The noise generated by the fan driven by the motor; 2. When the machine is running, the refrigerant throttling sound generated by the electronic expansion valve has a certain opening, such as the normal operation, the outdoor unit During oil return operation, etc. The throttling sound caused by the opening of the electronic expansion valve when the internal unit is not turned on will have an impact on the user, but in the prior art, there is no effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/64F24F11/65F24F11/61F24F11/84F24F120/10
CPCF24F11/61F24F11/64F24F11/65F24F11/84F24F2120/10F25B49/02F24F2140/50F24F11/86F24F13/24F25B31/004F25B2313/0233F25B40/02F25B13/00F25B2600/25Y02B30/70F25B49/022F25B2500/16F25B2600/0253F25B2600/2513
Inventor 张铭宋德跃高强王海胜卢大海张晓迪周明杰
Owner 合肥海尔空调电子有限公司
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