CN107606836B - Starting control method of single-screw refrigeration compressor - Google Patents
Starting control method of single-screw refrigeration compressor Download PDFInfo
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- CN107606836B CN107606836B CN201710952870.2A CN201710952870A CN107606836B CN 107606836 B CN107606836 B CN 107606836B CN 201710952870 A CN201710952870 A CN 201710952870A CN 107606836 B CN107606836 B CN 107606836B
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Abstract
The invention discloses a starting control method of a single-screw refrigeration compressor, which comprises the following steps: before the compressor is electrified to operate, the load reduction electromagnetic valve and the load increase electromagnetic valve are started simultaneously for 2-3 minutes, then the load increase electromagnetic valve is closed after the compressor is electrified to operate for 2-3 minutes, the load increase electromagnetic valve is opened to continuously electrify for 2-3 minutes after the compressor continues to operate for 2-3 minutes, and then the load increase electromagnetic valve carries out pulse indirect electrification operation according to requirements. The invention has the beneficial effects that: the phenomenon that the compressor cannot run in a load increasing mode when the compressor is started for the first time can be avoided.
Description
Technical Field
The invention relates to the technical field of single-screw refrigeration compressors, in particular to a starting control method of a single-screw refrigeration compressor.
Background
During the use of a single-screw refrigeration compressor, particularly in a refrigeration system using mineral refrigeration oil, during the debugging or actual operation of a unit, the load increase can not be realized or the load increase operation can be realized only by needing a large pressure difference when the unit is started for the first time.
The reason for this is that when the oil used in the compressor is mineral oil and the ambient temperature is lower than 20 ℃, the refrigerant-containing refrigerant is gasified by the electromagnetic valve to generate a large amount of foam, which causes a small through hole in the electromagnetic valve to generate air blockage or a large amount of foam in the cylinder, and the general electromagnetic valve control adopts a pulse indirect power supply mode of about 0.1-0.5s, which makes it difficult to increase the load.
Disclosure of Invention
The invention aims to provide a starting control method of a single-screw refrigeration compressor, which can avoid the phenomenon that the compressor cannot run in a load-increasing mode when the compressor is started for the first time.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a starting control method of a single-screw refrigeration compressor comprises the following steps: before the compressor is electrified to operate, the load reduction electromagnetic valve and the load increase electromagnetic valve are started simultaneously for 2-3 minutes, then the load increase electromagnetic valve is closed after the compressor is electrified to operate for 2-3 minutes, the load increase electromagnetic valve is opened to continuously electrify for 2-3 minutes after the compressor continues to operate for 2-3 minutes, and then the load increase electromagnetic valve carries out pulse indirect electrification operation according to requirements.
The working principle of the invention is as follows: by prolonging the power supply time of the electromagnetic valve, the phenomenon that the electromagnetic valve generates a large amount of foam and further generates congestion is avoided, and the problem that the load cannot be increased is solved.
The invention has the beneficial effects that: the phenomenon that the compressor cannot run in a load increasing mode when the compressor is started for the first time can be avoided.
Detailed Description
The following further describes embodiments of the present invention with reference to examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The technical scheme of the specific implementation of the invention is as follows:
a starting control method of a single-screw refrigeration compressor comprises the following steps: before the compressor is powered on to operate, the load reduction electromagnetic valve and the load increase electromagnetic valve are started simultaneously for 2-3 minutes, then the load increase electromagnetic valve is closed after the compressor is powered on to operate for 2-3 minutes, then the load increase electromagnetic valve is opened to be powered on continuously for 2-3 minutes, and then the load increase electromagnetic valve is subjected to pulse indirect power-on operation for 0.1-0.5s according to requirements.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (1)
1. A single-screw refrigeration compressor starting control method is characterized by comprising the following steps: before the compressor is powered on to operate, the load reduction electromagnetic valve and the load increase electromagnetic valve are started simultaneously for 2-3 minutes, then the load increase electromagnetic valve is closed after the compressor is powered on to operate for 2-3 minutes, then the load increase electromagnetic valve is opened to be powered on continuously for 2-3 minutes, and then the load increase electromagnetic valve is powered on for 0.1-0.5s according to requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710952870.2A CN107606836B (en) | 2017-10-13 | 2017-10-13 | Starting control method of single-screw refrigeration compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710952870.2A CN107606836B (en) | 2017-10-13 | 2017-10-13 | Starting control method of single-screw refrigeration compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107606836A CN107606836A (en) | 2018-01-19 |
| CN107606836B true CN107606836B (en) | 2020-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710952870.2A Active CN107606836B (en) | 2017-10-13 | 2017-10-13 | Starting control method of single-screw refrigeration compressor |
Country Status (1)
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| CN (1) | CN107606836B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54111154A (en) * | 1978-02-17 | 1979-08-31 | Matsushita Refrig Co | Refrigeratorsigma defrosting device |
| US4393662A (en) * | 1981-09-28 | 1983-07-19 | Dirth George P | Control system for refrigeration or air conditioning installation |
| JPH0336449A (en) * | 1989-06-30 | 1991-02-18 | Toshiba Corp | Air conditioner |
| JPH06159822A (en) * | 1992-11-20 | 1994-06-07 | Matsushita Seiko Co Ltd | Device for controlling motor-operated expansion valve for air conditioner |
| ITPN20050017A1 (en) * | 2005-03-14 | 2006-09-15 | Domnick Hunter Hiross S P A | "CONTROL SYSTEM FOR REFRIGERATED GAS COMPRESSED DRYERS". |
| US20100236264A1 (en) * | 2007-05-15 | 2010-09-23 | Carrier Corporation | Compressor motor control |
| CN102331123B (en) * | 2011-05-30 | 2013-07-10 | 宁波奥克斯电气有限公司 | Safety control method for lubricating oil of multi-unit air conditioner of screw compressor |
| CN202145061U (en) * | 2011-06-16 | 2012-02-15 | 浙江国祥空调设备有限公司 | Water-cooling water chilling unit with multiple shunt-wound compressors |
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2017
- 2017-10-13 CN CN201710952870.2A patent/CN107606836B/en active Active
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| Publication number | Publication date |
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| CN107606836A (en) | 2018-01-19 |
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