CN114992088A - Air conditioner shutdown oil return control method and system - Google Patents
Air conditioner shutdown oil return control method and system Download PDFInfo
- Publication number
- CN114992088A CN114992088A CN202210672658.1A CN202210672658A CN114992088A CN 114992088 A CN114992088 A CN 114992088A CN 202210672658 A CN202210672658 A CN 202210672658A CN 114992088 A CN114992088 A CN 114992088A
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- Prior art keywords
- compressor
- air conditioner
- shutdown
- oil
- oil return
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000003111 delayed effect Effects 0.000 claims abstract description 16
- 238000004590 computer program Methods 0.000 claims description 7
- 230000001934 delay Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 63
- 239000010687 lubricating oil Substances 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/12—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/02—Lubrication
- F04B39/0207—Lubrication with lubrication control systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a method and a system for controlling shutdown oil return of an air conditioner, wherein the air conditioner comprises a compressor and an oil separator connected with the compressor through a main pipeline, a capillary tube for delaying the flow rate of oil is arranged on the main pipeline, a bypass pipeline connected with the capillary tube in parallel is also arranged on the main pipeline, an electric control valve is arranged on the bypass pipeline, and the control method comprises the following steps: when the air conditioner receives a shutdown instruction, delaying the shutdown time of the compressor, and opening the electric control valve within the delayed shutdown time period of the compressor, so that oil in the oil separator can flow back to the compressor through the bypass pipeline; when the compressor is stopped, closing the electric control valve; the technical scheme of the invention does not influence the delay effect of the lubricating oil entering the oil separator from the compressor, and can eliminate the retardation of the capillary tube on the returned lubricating oil when the air conditioner is stopped, so that the returned lubricating oil can quickly return to the compressor through the bypass, thereby avoiding the situation that the lubricating oil can not completely return and ensuring the service life of the compressor.
Description
Technical Field
The invention relates to the technical field of oil return of air conditioners, in particular to a method and a system for controlling shutdown oil return of an air conditioner.
Background
The current air conditioner, especially the multi-split air conditioning system, generally configures an oil separator for the compressor in the outdoor unit, as shown in fig. 4, and also configures a capillary tube on the pipeline between the oil separator and the compressor, when the air conditioner starts to operate, the lubricating oil in the compressor flows into the oil separator through the pipeline and is shunted to each mechanism needing lubrication through the oil separator, when the air conditioner stops, the oil in the oil separator needs to be returned to the compressor again, so as to ensure that enough lubricating oil is available for the compressor when the air conditioner starts next time. However, since the capillary resistance on the pipeline is not adjustable, although the capillary resistance can delay the speed of the lubricating oil entering the oil separator, when the compressor is stopped, the lubricating oil can not be completely returned to the compressor before the compressor is stopped every time, and the abrasion and even the failure of the compressor caused by insufficient lubricating oil when the compressor is restarted can be caused in severe cases.
Disclosure of Invention
The present invention aims to solve the above technical problems and provide a method and a system for controlling the oil return of an air conditioner during the shutdown of the air conditioner, which can effectively return the lubricating oil in an oil separator to a compressor.
In order to achieve the purpose, the invention discloses a shutdown oil return control method of an air conditioner, the air conditioner comprises a compressor and an oil separator connected with the compressor through a main pipeline, a capillary tube for delaying the flow rate of oil is arranged on the main pipeline, a bypass pipeline connected with the capillary tube in parallel is also arranged on the main pipeline, an electric control valve is arranged on the bypass pipeline, and the control method comprises the following steps:
when the air conditioner receives a shutdown instruction, delaying the shutdown time of the compressor, and opening the electric control valve within the delayed shutdown time period of the compressor, so that the oil in the oil separator can flow back to the compressor through the bypass pipeline;
and when the compressor is stopped, closing the electric control valve.
Preferably, the compressor is of a variable frequency type, and the rotation speed of the compressor is reduced within a delayed shutdown time period of the compressor.
Preferably, the length of the delayed shutdown time period of the compressor is T, and T is more than or equal to 30s and less than or equal to 120 s.
Preferably, the electric control valve is a solenoid valve.
The invention also discloses an air conditioner shutdown oil return control system, wherein the air conditioner comprises a compressor and an oil separator connected with the compressor through a main pipeline, a capillary tube for delaying the flow rate of oil is arranged on the main pipeline, and the control system comprises an electric control valve, a delay module and a switch control module;
a bypass pipeline connected with the capillary tube in parallel is further arranged on the main pipeline, and the electric control valve is arranged on the bypass pipeline;
the time delay module is used for delaying the shutdown time of the compressor according to the shutdown instruction received by the air conditioner;
the switch control module is used for opening the electric control valve within a delay time period when the delay module delays the shutdown of the compressor, so that oil in the oil separator can flow back to the compressor through the bypass pipeline, and the electric control valve is closed when the compressor is shut down.
Preferably, the compressor is of a variable frequency type, and the compressor further comprises a speed reduction module, and the speed reduction module is used for reducing the rotating speed of the compressor in the delayed shutdown time period of the compressor.
Preferably, the length of the delayed shutdown time period of the compressor is T, and T is more than or equal to 30s and less than or equal to 120 s.
Preferably, the electric control valve is a solenoid valve.
The invention also discloses a shutdown oil return control system of the air conditioner, which comprises the following components:
one or more processors;
a memory;
and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs comprising instructions for performing the air conditioner shutdown oil return control method as described above.
The invention also discloses a computer readable storage medium which comprises a computer program, wherein the computer program can be executed by a processor to complete the air conditioner shutdown oil return control method.
Compared with the prior art, in the technical scheme of the invention, a bypass pipeline is configured for the capillary tube on the main pipeline, the electric control valve is arranged on the bypass pipeline, when the air conditioner receives a shutdown instruction, the shutdown time of the compressor is delayed, and the electric control valve on the bypass pipeline is opened in the delay time period, so that oil in the oil separator can quickly flow back into the compressor through the bypass pipeline; therefore, the technical scheme of the invention does not influence the delay effect of the lubricating oil entering the oil separator from the compressor, and can eliminate the retardation of the capillary tube on the returned lubricating oil when the air conditioner is stopped, so that the returned lubricating oil can quickly return to the compressor through the bypass, thereby avoiding the incomplete return of the lubricating oil and ensuring the service life of the compressor.
Drawings
Fig. 1 is a structural diagram of an oil return principle of a single-compressor air conditioner in an embodiment of the invention.
Fig. 2 is a structure diagram of an oil return principle of the duplex compressor air conditioner in the embodiment of the invention.
Fig. 3 is a flowchart of an oil return control method in the embodiment of the present invention.
Fig. 4 is a diagram illustrating an oil return principle in the prior art.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
The embodiment discloses an air conditioner shutdown oil return control method, as shown in fig. 1 and 2, to manage and control oil return operation of an air conditioner outdoor unit equipped with an oil separator, and ensure that lubricating oil in the oil separator is fully distributed to a compressor when the compressor is shutdown, the air conditioner in the embodiment includes a compressor and an oil separator connected with the compressor through a main pipeline L1, a capillary tube P delaying flow rate of oil is arranged on the main pipeline L1, a bypass pipeline L2 connected with the capillary tube P in parallel is further arranged on the main pipeline L1, one end of the bypass pipeline L2 is connected between the oil separator and the capillary tube P, the other end of the bypass pipeline L2 is connected with an oil return end of the compressor, an electric control valve SV is arranged on the bypass pipeline L2, please refer to fig. 1 to 3, and the control method in the embodiment includes:
s1: the air conditioner receives a shutdown instruction;
s2: delaying to shut down the compressor and starting timing;
s2: confirming whether the delay time is overflowed, if not, the step is carried out to the step S4, and if so, the step is carried out to the step S5;
s4: opening an electric control valve SV so that oil in the oil separator can flow back to the compressor through a bypass line L2;
s5: the compressor is shut down and the electrically controlled valve SV is closed.
By the control method, when the air conditioner receives a shutdown instruction, the shutdown time of the compressor is delayed, and the electric control valve SV on the bypass pipeline L2 is opened in the delay time period, so that the oil reflowing speed through the main pipeline L1 is inevitably lower than the reflowing speed through the bypass pipeline L2 due to the retardation effect of the capillary tube P, the oil in the oil separator can quickly reflow into the compressor through the bypass pipeline L2, the retardation of the capillary tube P on the reflowing lubricating oil is eliminated, the reflowing lubricating oil quickly reflows to the compressor through a bypass, the lubricating oil can not completely reflow, and the service life of the compressor is ensured. It should be noted that the control method in this embodiment may be applied to an air conditioner with a single compressor (as shown in fig. 1), or may be applied to a multi-compressor air conditioner with multiple compressors (as shown in fig. 2).
The control method can be used for a constant speed compressor and an inverter compressor. When the compressor is of a variable frequency type, the rotating speed of the compressor is reduced within the delayed shutdown time period of the compressor so as to slow down the impact of the backflow oil on the compressor.
Optionally, the length of the delayed shutdown period of the compressor is T, and T is more than or equal to 30s and less than or equal to 120 s.
Optionally, the electrically controlled valve SV is a solenoid valve.
In another embodiment of the present invention, please refer to fig. 1 again, further disclose a shutdown oil return control system of an air conditioner, the air conditioner includes a compressor and an oil separator connected to the compressor through a main line L1, a capillary tube P for delaying the flow rate of oil is disposed on the main line L1, and the control system includes an electric control valve SV, a delay module and a switch control module.
The main pipeline L1 is also provided with a bypass pipeline L2 connected with the capillary tube P in parallel, and the electric control valve SV is arranged on the bypass pipeline L2.
And the time delay module is used for delaying the shutdown time of the compressor according to the shutdown instruction received by the air conditioner.
And the switch control module is used for opening the electric control valve SV in a delay time period when the delay module delays the shutdown of the compressor so that the oil liquid in the oil separator can flow back to the compressor through the bypass line L2, and closing the electric control valve SV when the compressor is shut down.
Optionally, the control system further includes a speed reduction module, and the speed reduction module is configured to reduce a rotation speed of the compressor during the delayed shutdown period of the compressor.
The working principle and working mode of the control system in this embodiment are described in detail in the above control method, and are not described herein again.
The invention also discloses another air conditioner shutdown oil return control system which comprises one or more processors, a memory and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the programs comprise instructions for executing the air conditioner shutdown oil return control method. The processor may be a general Central Processing Unit (CPU), a microprocessor, an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits, and is configured to execute related programs to implement functions required to be executed by modules in the air conditioner shutdown oil return control system according to the embodiment of the present Application, or to execute the air conditioner shutdown oil return control method according to the embodiment of the present Application.
The invention also discloses a computer readable storage medium which comprises a computer program, wherein the computer program can be executed by a processor to complete the air conditioner shutdown oil return control method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more of the available media. The usable medium may be a read-only memory (ROM), or a Random Access Memory (RAM), or a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape, a magnetic disk, or an optical medium, such as a Digital Versatile Disk (DVD), or a semiconductor medium, such as a Solid State Disk (SSD).
The embodiment of the application also discloses a computer program product or a computer program, which comprises computer instructions, and the computer instructions are stored in a computer readable storage medium. The processor of the electronic equipment reads the computer instruction from the computer readable storage medium, and the processor executes the computer instruction, so that the electronic equipment executes the air conditioner shutdown oil return control method.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (10)
1. The air conditioner comprises a compressor and an oil separator connected with the compressor through a main pipeline, wherein a capillary tube for delaying the flow velocity of oil is arranged on the main pipeline, the air conditioner is characterized in that a bypass pipeline connected with the capillary tube in parallel is further arranged on the main pipeline, an electric control valve is arranged on the bypass pipeline, and the control method comprises the following steps:
when the air conditioner receives a shutdown instruction, delaying the shutdown time of the compressor, and opening the electric control valve within the delayed shutdown time period of the compressor, so that the oil in the oil separator can flow back to the compressor through the bypass pipeline;
and when the compressor is stopped, closing the electric control valve.
2. The air conditioner shutdown oil return control method according to claim 1, wherein the compressor is of a variable frequency type, and the rotation speed of the compressor is reduced during the delayed shutdown period of the compressor.
3. The air conditioner shutdown oil return control method as claimed in claim 1, wherein the length of the delayed shutdown period of the compressor is T, and T is greater than or equal to 30s and less than or equal to 120 s.
4. The air conditioner shutdown oil return control method according to claim 1, characterized in that the electric control valve is an electromagnetic valve.
5. An air conditioner shutdown oil return control system comprises a compressor and an oil separator connected with the compressor through a main pipeline, wherein a capillary tube for delaying the flow rate of oil is arranged on the main pipeline;
a bypass pipeline connected with the capillary tube in parallel is further arranged on the main pipeline, and the electric control valve is arranged on the bypass pipeline;
the time delay module is used for delaying the shutdown time of the compressor according to the shutdown instruction received by the air conditioner;
the switch control module is used for opening the electric control valve within a delay time period when the delay module delays the shutdown of the compressor, so that oil in the oil separator can flow back to the compressor through the bypass pipeline, and the electric control valve is closed when the compressor is shut down.
6. The air conditioner shutdown oil return control system of claim 5, wherein the compressor is of a variable frequency type, further comprising a speed reduction module, and the speed reduction module is configured to reduce a rotation speed of the compressor during the delayed shutdown period of the compressor.
7. An air conditioner shutdown oil return control system as claimed in claim 5, wherein the length of the delayed shutdown period of the compressor is T, 30s ≦ T ≦ 120 s.
8. An air conditioner shutdown oil return control system as claimed in claim 5 wherein said electrical control valve is a solenoid valve.
9. The utility model provides an air conditioner shuts down oil return control system which characterized in that includes:
one or more processors;
a memory;
and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the programs comprising instructions for performing the air conditioner shutdown oil return control method of any one of claims 1 to 4.
10. A computer-readable storage medium comprising a computer program executable by a processor to perform the air conditioner shutdown oil return control method according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210672658.1A CN114992088A (en) | 2022-06-14 | 2022-06-14 | Air conditioner shutdown oil return control method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210672658.1A CN114992088A (en) | 2022-06-14 | 2022-06-14 | Air conditioner shutdown oil return control method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114992088A true CN114992088A (en) | 2022-09-02 |
Family
ID=83035782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210672658.1A Pending CN114992088A (en) | 2022-06-14 | 2022-06-14 | Air conditioner shutdown oil return control method and system |
Country Status (1)
| Country | Link |
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| CN (1) | CN114992088A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01273956A (en) * | 1988-04-26 | 1989-11-01 | Mitsubishi Electric Corp | Air conditioner |
| JPH04203286A (en) * | 1990-11-28 | 1992-07-23 | Daikin Ind Ltd | Oil lubrication device of compressor for freezer |
| JPH11304265A (en) * | 1998-04-20 | 1999-11-05 | Fujitsu General Ltd | Air conditioner |
| JP2001091068A (en) * | 1999-09-20 | 2001-04-06 | Fujitsu General Ltd | Air conditioner |
| CN101191686A (en) * | 2006-11-30 | 2008-06-04 | 海尔集团公司 | Air conditioner for implementing high and low pressure side pressure balancing |
| CN101871707A (en) * | 2010-06-29 | 2010-10-27 | 广东志高空调有限公司 | Oil return system of low-pressure cavity compressor air conditioner |
| CN201666696U (en) * | 2010-02-09 | 2010-12-08 | 海信（山东）空调有限公司 | Air-conditioner return oil system and air conditioner |
| CN104236168A (en) * | 2014-07-10 | 2014-12-24 | 广东美的集团芜湖制冷设备有限公司 | Oil return control method and oil return control system for compressor system |
| CN106930932A (en) * | 2017-04-12 | 2017-07-07 | 珠海格力电器股份有限公司 | Compressor shutdown control device, system and method |
-
2022
- 2022-06-14 CN CN202210672658.1A patent/CN114992088A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01273956A (en) * | 1988-04-26 | 1989-11-01 | Mitsubishi Electric Corp | Air conditioner |
| JPH04203286A (en) * | 1990-11-28 | 1992-07-23 | Daikin Ind Ltd | Oil lubrication device of compressor for freezer |
| JPH11304265A (en) * | 1998-04-20 | 1999-11-05 | Fujitsu General Ltd | Air conditioner |
| JP2001091068A (en) * | 1999-09-20 | 2001-04-06 | Fujitsu General Ltd | Air conditioner |
| CN101191686A (en) * | 2006-11-30 | 2008-06-04 | 海尔集团公司 | Air conditioner for implementing high and low pressure side pressure balancing |
| CN201666696U (en) * | 2010-02-09 | 2010-12-08 | 海信（山东）空调有限公司 | Air-conditioner return oil system and air conditioner |
| CN101871707A (en) * | 2010-06-29 | 2010-10-27 | 广东志高空调有限公司 | Oil return system of low-pressure cavity compressor air conditioner |
| CN104236168A (en) * | 2014-07-10 | 2014-12-24 | 广东美的集团芜湖制冷设备有限公司 | Oil return control method and oil return control system for compressor system |
| CN106930932A (en) * | 2017-04-12 | 2017-07-07 | 珠海格力电器股份有限公司 | Compressor shutdown control device, system and method |
Non-Patent Citations (1)
| Title |
|---|
| 王仁祥: "常用低压电器原理及其控制技术第3版", vol. 3, 31 January 2022, 机械工业出版社, pages: 191 - 193 * |
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