CN101634290B - Method for drying hermetic compressor by ohmic heating - Google Patents
Method for drying hermetic compressor by ohmic heating Download PDFInfo
- Publication number
- CN101634290B CN101634290B CN200910055884XA CN200910055884A CN101634290B CN 101634290 B CN101634290 B CN 101634290B CN 200910055884X A CN200910055884X A CN 200910055884XA CN 200910055884 A CN200910055884 A CN 200910055884A CN 101634290 B CN101634290 B CN 101634290B
- Authority
- CN
- China
- Prior art keywords
- drying
- compressor
- heating
- nitrogen
- hermetic compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to a method for drying a hermetic compressor by ohmic heating and belongs to the mechanotronics technology field. Dryness of a compressor is directly related to normal working of a refrigerating system, and the whole compressor is placed into a dry box for drying in the prior art, which has the disadvantages of great energy consumption, low drying efficiency and poor drying effect. In the drying method, low-voltage AC is led into windings of a motor of the compressor, and a closed shell is heated by heat generation of the windings when operation of vacuumization and nitrogen gas introduction are performed to discharge vapor in the shell. An automatic-regulation silicon-controlled voltage-regulation transformer is adopted to supply heating power supply, thus realizingautomatic control of temperature in the shell. The compressor is then dried. The method has the following advantages of good drying effect due to simultaneous operation of heating and vacuumization, high electric energy utilization rate and energy saving due to energization in the windings, reduced drying operation time of single product and improved efficiency, and high automaticity and labor force saving.
Description
Technical field
The invention belongs to electromechanical integration technology, specifically a kind of method of drying hermetic compressor by ohmic heating.
Background technique
Air-conditioning and refrigerator are the household electric appliance that modern society generally uses, a lot of air-conditionings and compressor for refrigeration are airtight or the half airtight refrigeration compressor, it is enclosed in rotor, the stationary part of gas compression part and motor in the housing, and then forms refrigeration system with condenser, vaporizer etc.Can the degree of dryness of compressor is directly connected to refrigeration system proper functioning, and the lot of domestic and international standard has strict regulation to compressor complete machine water content, and this just requires to need in the compressor production process it is carried out drying process.Prior art is whole compressor to be put into drying oven carry out drying.But this method energy consumption is big, drying efficiency is low, drying effect is bad.Therefore it is necessary inventing the compressor drying means that a kind of energy consumption is little, drying efficiency is high, drying effect is good.
The present invention adopts and feed low-voltage AC in the winding of compressor electric motor, utilizes heating in winding airtight housing heating to be carried out the method for compressor drying.Through extensively retrieving domestic and international patent documentation and consulting public publication, Shang Weijian has the new method about drying hermetic compressor by ohmic heating identical with technical solution of the present invention.
Summary of the invention
The purpose of this invention is to provide the compressor drying means that a kind of energy consumption is little, drying efficiency is high, drying effect is good.
The object of the present invention is achieved like this:
Method for drying hermetic compressor by ohmic heating: by in the winding of compressor electric motor, feeding low-voltage AC, utilize heating in winding, vacuumize simultaneously and the operation of logical nitrogen is discharged the water vapour in the housing to the heating of airtight housing.
Use the automatic silicon-controlled voltage regulation transformer of regulating that heating power supply is provided, realize that temperature is controlled automatically in the housing.
Use charged winding temperature rise detector to measure the interior temperature of housing.
Use humidity measurement instrument to detect moisture content from the nitrogen that housing is discharged.
The concrete main points of implementing of the present invention are:
With the logical single-phase alternating current in three winding serial connections of compressor back, the heat that winding sends is used to heat airtight compressor cavity; Use vacuum pump to extract the interior air of cavity out simultaneously; And feeding nitrogen, by controller the temperature in the cavity is controlled at 100 ± 10 ℃.Freeze-day with constant temperature, the compressor constant temperature time difference for different model was generally 1-2 hour.Constant temperature finishes, and stops heating, and the nitrogen of extracting out in the cavity takes water vapour out of, the circulation said process, up to the moisture content of compressor cavity less than 100ppm, till humidity satisfies regulation and requires.
The inventive method can have abnormity protection function according to the automatic complete process operation of expectant control flow process, has improved system reliability, has alleviated labor intensity of operating personnel.And humidity that can on-line measurement compressor cavity stops after humidity meets the demands automatically, and provides the prompting that operation is finished.Can also be according to operating experience, the timing controlled off-test time.The present invention has the function of charged detection winding temperature, can obtain winding temperature value accurately in real time, by Fuzzy PID compressor temperature is controlled at about 100 ℃, reduces the operating time of single product, and saving power is raised the efficiency.
The present invention changes prior art whole compressor is put into the method that drying oven carries out drying, and initiative feeds low-voltage AC in the compressor electric motor winding, utilizes heating in winding that dry method is carried out in airtight housing heating, has novelty and creativeness.Closed compressor is used in air-conditioning and refrigerator generally, and usage quantity is big, and the dry workload of closed compressor is big, and the present invention has practicability.
Advantage of the present invention is as follows:
1. method for drying hermetic compressor by ohmic heating of the present invention is owing to heat, vacuumize simultaneously and carry out, so drying effect is good.
2. the present invention is owing to switching in winding, so the utilization rate of electrical height is saved the energy.
3. reduce the single product drying operating time, raise the efficiency.
4. the automaticity height is saved manpower.
Description of drawings
Fig. 1 is compressor energising heating and drying method schematic diagram of the present invention.
Embodiment
The present invention will be further described by embodiment below in conjunction with accompanying drawing.
System's input power supply is 50HZ, the 380V single phase alternating current power supply, and the silicon-controlled voltage regulation transformer sends the control of 4～20mA analogue signal by industrial control computer, and band carries adjustable continuously in the 0-60V scope.Winding temperature adopts advanced charged winding temperature rise detection technique, need not cut off the temperature that the winding power supply can be measured winding in real time.Humidity detecting adopts the highi degree of accuracy humidity measurement instrument, can detect the humidity in the compressor from the nitrogen that compressor is discharged.It is master controller that system adopts industrial control computer, gathers external signal and state by AD, AI unit, sends control signal by DA and DO unit.
Automatic control flow chart is as follows:
1. after installing tested compressor, start measuring system; Judge by detecting winding resistance whether the contact of installation terminal is reliable, if unreliable, then provides alarm earlier, behind the installation qualification, carry out the bottom operation.
2. the startup vacuum pump is extracted air in the cavity out, feeds nitrogen then; Connect power supply, start heating; After nitrogen pressure reaches 2 barometric pressure, stop to feed nitrogen, keep this pressure; By controller output control signal the compression built-in temperature is controlled at about 100 ℃, keeps 1 hour (T1).
3. stop heating, emit the nitrogen in the cavity,, start vacuum pump, extract the nitrogen in the cavity out when nitrogen pressure during less than 1.2 barometric pressure, can be in this process by the humidity in the nitrogen continuous measurement cavity of discharging, endurance 10-20 minute (T2).
4. repeat 2 and 3 processes, meet the demands up to humidity, moisture content is less than 100ppm.In the invention process, can time T 1 and T2 be set according to compressor production environment, season, body water content, and in debug process, adjust.
The foregoing description is not used for limiting the present invention, and all within principle of the present invention, any modifications and variations of being done are all within protection scope of the present invention.
Claims (4)
1. method for drying hermetic compressor by ohmic heating is characterized in that:
(1) in the winding of compressor electric motor, feeds low-voltage AC, utilize heating in winding airtight housing heating;
(2) start vacuum pump, extract air in the cavity out, feed nitrogen then; Connect power supply, start heating; After nitrogen pressure reaches 2 barometric pressure, stop to feed nitrogen, keep this pressure; Make the compression built-in temperature be controlled at 100 ℃ by controller output control signal, kept 1 hour;
(3) stop heating, emit the nitrogen in the cavity,, start vacuum pump, extract the nitrogen in the cavity out when nitrogen pressure during less than 1.2 barometric pressure; By the humidity in the nitrogen continuous measurement cavity of discharging, endurance 10-20 minute;
(4) repeating step (2) and step (3), up to moisture content less than 100ppm.
2. method for drying hermetic compressor by ohmic heating as claimed in claim 1 is characterized in that: use the automatic silicon-controlled voltage regulation transformer of regulating that heating power supply is provided, realize that temperature is controlled automatically in the housing.
3. method for drying hermetic compressor by ohmic heating as claimed in claim 1 is characterized in that: use charged winding temperature rise detector to measure the interior temperature of housing.
4. method for drying hermetic compressor by ohmic heating as claimed in claim 1 is characterized in that: adopt humidity measurement instrument to detect moisture content from the nitrogen that housing is discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910055884XA CN101634290B (en) | 2009-08-04 | 2009-08-04 | Method for drying hermetic compressor by ohmic heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910055884XA CN101634290B (en) | 2009-08-04 | 2009-08-04 | Method for drying hermetic compressor by ohmic heating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101634290A CN101634290A (en) | 2010-01-27 |
| CN101634290B true CN101634290B (en) | 2011-09-14 |
Family
ID=41593589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910055884XA Expired - Fee Related CN101634290B (en) | 2009-08-04 | 2009-08-04 | Method for drying hermetic compressor by ohmic heating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101634290B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074346B (en) * | 2010-12-06 | 2012-05-30 | 保定天威集团有限公司 | Drying process of high-voltage current transformer body |
| CN108800489B (en) * | 2018-06-20 | 2020-12-22 | 广东美的制冷设备有限公司 | Control method and device for heating compressor winding |
| CN108954730B (en) * | 2018-06-20 | 2021-04-20 | 广东美的制冷设备有限公司 | Control method and device for heating compressor winding |
| CN109059192B (en) * | 2018-06-20 | 2021-04-20 | 广东美的制冷设备有限公司 | Control method and device for heating compressor winding |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3869132B2 (en) * | 1998-10-29 | 2007-01-17 | 三菱電機株式会社 | Drying device inside hermetic compressor |
-
2009
- 2009-08-04 CN CN200910055884XA patent/CN101634290B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3869132B2 (en) * | 1998-10-29 | 2007-01-17 | 三菱電機株式会社 | Drying device inside hermetic compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101634290A (en) | 2010-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101634290B (en) | Method for drying hermetic compressor by ohmic heating | |
| CN203871705U (en) | Switch cabinet anti-condensation and dehumidifying device | |
| CN102269440A (en) | Intelligent self-control frequency-variable kitchen ventilator | |
| CN205141444U (en) | Condensation device is prevented to intelligence | |
| CN204190206U (en) | Fire prevention anti-condensation switch cabinet | |
| CN102974407A (en) | Unsaturated high-pressure accelerated ageing test box | |
| CN102230659A (en) | Method for controlling energy-saving precision constant-temperature and constant-humidity air conditioner and air conditioner thereof | |
| CN203231898U (en) | Intelligent detection system for water-stored electric water heater efficiency test | |
| CN103644705B (en) | The method for controlling frequency conversion of the frequency-changing control system of refrigerator, refrigerator and refrigerator | |
| CN103779795A (en) | Dehumidification device for electric cabinets | |
| CN103134266B (en) | For the intelligent control circuit of direct-cooled machine control refrigerator | |
| CN102878066B (en) | A kind of air compressor life test apparatus | |
| CN102832765B (en) | Automatic insulation keeping and drying control method for motor | |
| CN203690847U (en) | Anti-condensation device for long vertical enclosed busbar with heavy current | |
| GB201117719D0 (en) | Pipe icing inhibition | |
| CN204903996U (en) | Dry -type transformer drying control device | |
| CN202975883U (en) | Dehumidifying and circular drying device for transformer substation cabinet | |
| CN102680143A (en) | Temperature sensing device for air conditioner commodity inspection | |
| CN107456068A (en) | Control method, control device and the cooking apparatus of cooking apparatus | |
| CN206684560U (en) | A kind of dark brownish green fermentation humiture monitoring device based on PLC | |
| CN205678793U (en) | Far infrared automatic dehumidifier | |
| CN202269374U (en) | Automatic vacuum regulating device | |
| CN209516337U (en) | A kind of moisture-proof ventilation AC low voltage drawing type switch cabinet | |
| CN103717972B (en) | Heating device and the control method of heating device | |
| CN202887030U (en) | Condensation-prevention device for enclosed bus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20140804 |
|
| EXPY | Termination of patent right or utility model |