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Oil return control method and device and outdoor unit of variable-frequency air conditioner

A frequency conversion air conditioner and control device technology, which is applied in the direction of refrigerators, compressors, refrigeration components, etc., can solve the problems of air conditioner cooling or heating capacity decline, and achieve the effect of ensuring reliable operation and improving heating/cooling performance

Inactive Publication Date: 2016-04-20
QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a control method, device, and outdoor unit for oil return of an inverter air conditioner, so as to at least solve the problem that the cooling or heating capacity of the air conditioner decreases when the inverter compressor operates in low-frequency and medium-frequency bands

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  • Oil return control method and device and outdoor unit of variable-frequency air conditioner
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  • Oil return control method and device and outdoor unit of variable-frequency air conditioner

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Embodiment 1

[0044] The embodiment of the present invention provides a method for controlling the oil return of an inverter air conditioner, which is specifically applied in such as figure 2 In the outdoor unit 1 of the inverter air conditioner shown, the outdoor unit 1 of the inverter air conditioner includes:

[0045] Inverter compressor 11 , an oil separator 12 connected with the inverter compressor 11 , an outdoor unit electronic expansion valve 14 and an inverter air conditioner oil return control device 15 . One end of the outdoor unit electronic expansion valve 14 communicates with the oil separator 12 , and the other end communicates with the inverter compressor 11 . Among them, the control device 15 for oil return of the inverter air conditioner is used to control the electronic expansion valve 14 of the outdoor unit in the inverter air conditioner system. The electronic expansion valve 14 of the outdoor unit has the characteristic of adjustable opening. The degree value can con...

Embodiment 2

[0057] The embodiment of the present invention provides a control device 15 for oil return of inverter air conditioner, which is specifically applied in such as figure 2 In the outdoor unit 1 of the inverter air conditioner shown, for the outdoor unit 1 of the inverter air conditioner, please refer to Embodiment 1 for details. figure 2 The description of the embodiment of the present invention will not be repeated here.

[0058] Such as Figure 5 As shown, the oil return control device 15 of the inverter air conditioner includes: a detection unit 501 , a determination unit 502 , and an adjustment unit 503 .

[0059] Wherein, the detection unit 501 is used to detect the first operating frequency of the inverter compressor.

[0060] The determining unit 502 is configured to determine a first opening value of the outdoor unit electronic expansion valve corresponding to the first operating frequency according to the first operating frequency and a pre-stored correspondence, wh...

Embodiment 3

[0069] The embodiment of the present invention provides an outdoor unit 1 of an inverter air conditioner, such as figure 2 As shown, the outdoor unit 1 of the inverter air conditioner includes: an inverter compressor 11, an oil separator 12 connected to the inverter compressor 11, an outdoor unit electronic expansion valve 14, and the control device for oil return of the inverter air conditioner in the second embodiment 15. One end of the outdoor unit electronic expansion valve 14 communicates with the oil separator 12 , and the other end communicates with the inverter compressor 11 .

[0070] Among them, the control device 15 for oil return of the inverter air conditioner is used to control the electronic expansion valve 14 of the outdoor unit in the inverter air conditioner system. The electronic expansion valve 14 of the outdoor unit has the characteristic of adjustable opening. The degree value can control the amount of lubricating oil returned to the inverter compressor...

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Abstract

An embodiment of the invention provides an oil return control method and device and an outdoor unit of a variable-frequency air conditioner so as to at least solve the problem that the refrigerating or heating capacity of an air conditioner is decreased when a variable-frequency compressor operates at low-frequency and middle-frequency bands. The variable-frequency air conditioner comprises the outdoor unit, the outdoor unit comprises a variable-frequency compressor and an oil separator communicated with the variable-frequency compressor, the outdoor unit further comprises an outdoor unit electronic expansion valve, one end of the outdoor unit electronic expansion valve is communicated with the oil separator, and the other end is communicated with the variable-frequency compressor. The method comprises steps as follows: the first operating frequency of the variable-frequency compressor is detected; according to the first operating frequency and the pre-stored corresponding relation, a first open degree value of the outdoor unit electronic expansion valve corresponding to the first operating frequency is determined, wherein the corresponding relation is the corresponding relation between the operating frequency and open degree values of the outdoor unit electronic expansion valve; the open degree value of the outdoor unit electronic expansion valve is adjusted to the first open degree value. The invention is applicable to the technical field of air conditioners.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a control method and device for oil return of frequency conversion air conditioners and an outdoor unit. Background technique [0002] With the improvement of people's living standards, the requirements for the heating / cooling performance of air conditioners are also getting higher and higher. Generally, an important factor affecting the heating / cooling performance of the air conditioner is the compressor in the air conditioner. [0003] At present, the compressor in the air conditioner cannot achieve oil-free lubrication. Lubricating oil is a substance that lubricates the moving parts in the compressor. If the compressor lacks lubricating oil, the compressor motor bearing and the compression chamber will not be effective. Lubrication, and thus increased friction can lead to compressor damage. However, when the compressor is running, the lubricating oil will be dischar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B31/00F25B49/02F25B41/04F25B41/06F25B41/20F25B41/34
CPCF25B43/02
Inventor 曹培春朱海滨耿海兵李丛来
Owner QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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