CN106766449B - A kind of compressor protection method when air-conditioning heating high temperature and pressure - Google Patents
A kind of compressor protection method when air-conditioning heating high temperature and pressure Download PDFInfo
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- CN106766449B CN106766449B CN201710000432.6A CN201710000432A CN106766449B CN 106766449 B CN106766449 B CN 106766449B CN 201710000432 A CN201710000432 A CN 201710000432A CN 106766449 B CN106766449 B CN 106766449B
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- outdoor fan
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The present invention provides compressor protection methods when a kind of air-conditioning heating high temperature and pressure, include the following steps, S1, preset outer machine current maxima I1With the larger value I2, coil temperature maximum of T1With the larger value T2；S2, in a heating mode, current sensor detection outer electromechanical flow valuve I, temperature sensor detection plate tube temperature angle value T, control system judgment method are as follows: 1. as I >=I1When, control system control outdoor fan stops working, and executes S3；2. as I < I1And T >=T1When, control system control outdoor fan stops working, and executes S3；3. working as I2≤I<I1And T2≤T<T1When, control system control outdoor fan stops working, and executes S3；S3, control system judge whether to meet recovery condition one or restore condition two, restore condition one, as I < I2And T < T1When, outdoor fan is resumed work, and S2 is returned；Recovery condition two, as T < T2And I < I1When, outdoor fan is resumed work, and S2 is returned；After above method, air-conditioning system high temperature-proof high pressure accuracy is high.
Description
Technical field
The present invention relates to air-conditioning technical fields, and in particular to compressor protection side when a kind of air-conditioning heating high temperature and pressure
Method.
Background technique
Generally all there are two types of mode, refrigeration mode and heating modes for existing fixed frequency air conditioner, and compressor is air conditioner
Significant components, it is existing for high temperature and pressure in a heating mode when compressor protection method, it is general using measurement indoor unit
The guard method of coil temperature, i.e., be equipped with temperature detector on coil pipe, examine by comparing temperature detector in the middle part of heat exchanger
The temperature and preset temperature measured, the working condition of the outer electromechanical machine of control room, the temperature that temperature detector detects is greater than default
When value, then close outdoor motor, outdoor fan stops working, air-conditioning system overall load reduce, air-conditioning system high-pressure with
Reduction, but the method have the following deficiencies: due to temperature sensor detect exist lag, meet when temperature sensor detects
When closing the temperature value of outdoor motor, the electric current of outdoor motor is often excessive at this time, and air-conditioning system overall load increases, simultaneously
Since coil temperature can not be completely corresponding with air-conditioning system high-pressure, coil temperature saturation temperature corresponding lower than high-pressure
Degree, therefore when air-conditioning system temperature is more than design temperature, it can not ensure that air-conditioning system high-pressure is no more than design pressure simultaneously
Power.Therefore when temperature sensor detect temperature be more than design temperature when, at this time compressor the long period under high-pressure
Work, compressor current is excessive, and heating in winding is more, and cylinder pressurization ratio is deteriorated, and is easy shutdown, reduced lifetime etc., and compressor stops
After work, air-conditioning system high temperature-proof high voltage protective accuracy is poor, and air-conditioning heating mode can not continue after stopping to indoor offer heat
Amount, user experience decline.
Summary of the invention
The present invention provides when a kind of a kind of air-conditioning heating high temperature and pressure that air-conditioning system high temperature-proof high pressure accuracy is good
Compressor protection method.
The technical solution used in the present invention is: compressor protection method when a kind of air-conditioning heating high temperature and pressure, including
Following steps,
S1, outer machine current maxima I is set in the controls in advance1With the larger value I2, and I2<I1；Set coil temperature
Maximum of T1With the larger value T2, and T2<T1；
S2, under air-conditioning heating mode, the outer electromechanical flow valuve I of current sensor real-time detection, temperature sensor real-time detection
Coil temperature value T, control system judge size between current detection value and current setting value and judge temperature detection value and temperature
The size between setting value is spent, specific judgment method is as follows:
1. as I >=I1When, control system issues instruction, stops powering to outdoor fan, and outdoor fan stops working, and executes
Step S3；
2. as I < I1When, control system judges coil temperature value T and setting value T1Size, as T >=T1When, control system
Instruction is issued, stops powering to outdoor fan, outdoor fan stops working, and executes step S3；
3. as I < I1And T < T1When, control system judges outer electromechanics flow valuve I and current setting value I2Size and coil temperature
Value T and desired temperature T2Size, work as I2≤I<I1And T2≤T<T1When, control system issues instruction, stops to outdoor fan
Power supply, outdoor fan stop working, and execute step S3；
S3, control system judge current detection value and whether temperature detection value meets recovery condition one or restore condition two,
The recovery condition one is, as I < I2And T < T1When, then control system issues instruction, restores to supply to outdoor fan
Electricity, outdoor fan are resumed work, return step S2；
The recovery condition two is, as T < T2And I < I1When, then control system issues instruction, restores to supply to outdoor fan
Electricity, outdoor fan are resumed work, return step S2；
After above method, compared with the prior art, the present invention has the following advantages:
The present invention sets I1、I2、T1、T2Etc. multiple judgement electric currents and temperature, current sensor detect current value in time,
Without lag, while cooperating temperature sensor again, control system can promptly and accurately obtain electric current and temperature items detected value, in turn
The working condition for adjusting air-conditioning, avoids compressor from working at high temperature under high pressure, and the working time of compressor increases, air-conditioning heating mould
The formula time is long, and high temperature-proof high pressure accuracy is good.When outer electromechanics flow valuve I or temperature value T meets the condition of setting, control system is just
Control outdoor fan stops working, and in the moment that outdoor fan stops, condensing pressure, i.e. high-pressure are constant, and outdoor fan stops
After only working, outdoor heat exchanger heat transfer effect decline, evaporating temperature is reduced, so that evaporating pressure reduces, i.e., low pressure reduces,
The pressure difference between high-pressure and low pressure becomes larger at this time, and pressure difference, which becomes larger, causes air-conditioning system cold medium flux to become smaller, compressor
Pressure at expulsion decline, high-pressure decline, so that it is guaranteed that compressor is run in normal current, normally-pressured neighbor.
Detailed description of the invention
Fig. 1 is flow chart of the present invention
Specific embodiment
As shown in Figure 1, specific step is as follows for compressor protection method when a kind of air-conditioning heating high temperature and pressure:
S1, outer machine current maxima I is set in the controls in advance1With the larger value I2, and I2<I1；Set coil temperature
Maximum of T1With the larger value T2, and T2<T1；
S2, under air-conditioning heating mode, the outer electromechanical flow valuve I of current sensor real-time detection, temperature sensor real-time detection
Coil temperature value T, control system judge size between current detection value and current setting value and judge temperature detection value and temperature
The size between setting value is spent, specific judgment method is as follows:
1. as I >=I1When, control system issues instruction, stops powering to outdoor fan, and outdoor fan stops working, and executes
Step S3；
2. as I < I1When, control system judges coil temperature value T and setting value T1Size, as T >=T1When, control system
Instruction is issued, stops powering to outdoor fan, outdoor fan stops working, and executes step S3；
3. as I < I1And T < T1When, control system judges outer electromechanics flow valuve I and current setting value I2Size and coil temperature
Value T and desired temperature T2Size, work as I2≤I<I1And T2≤T<T1When, control system issues instruction, stops to outdoor fan
Power supply, outdoor fan stop working, and execute step S3；
S3, control system judge current detection value and whether temperature detection value meets recovery condition one or restore condition two,
The recovery condition one is, as I < I2And T < T1When, then control system issues instruction, restores to supply to outdoor fan
Electricity, outdoor fan are resumed work, return step S2；
The recovery condition two is, as T < T2And I < I1When, then control system issues instruction, restores to supply to outdoor fan
Electricity, outdoor fan are resumed work, return step S2；
According to the difference of rated cooling capacity, the I1Value range be 8A-15A, I2Value range be 7A-13A, tool
Body is,
When rated cooling capacity is 5000W, the I1For 15A, I2For 13A；
When rated cooling capacity is 3500W, the I1For 11A, I2For 9A；
When rated cooling capacity is 2600W, the I1For 8A, I2For 7A；
Outer electromechanics flow valuve I includes that the current value of the current value and outdoor fan by compressor passes through in a heating mode
The outer electromechanical flow valuve I of current sensor detection promptly and accurately, compensates for the problem of temperature sensor detected value lags, control system is sentenced
Disconnected outer electromechanics flow valuve I and preset value I1Size, I1For outer electromechanical stream allow by maximum current value, as long as I >=I at this time1,
Control system just controls outdoor fan stopping, reducing outer machine load, and system high pressure pressure reduction guarantees compressor in normal pressure
Work in range.
As I < I1When, pass through temperature sensor detection plate tube temperature angle value T, T1For the maximum temperature values of coil temperature, at this time only
Want T >=T1When, control system just controls outdoor fan stopping, reducing air-conditioning system load, reduces temperature, compressor is avoided to exist
It works under high temperature.
As I < I1And T < T1When, pass through current sensor and the outer electromechanics flow valuve I of temperature sensor real-time detection and coil pipe respectively
Temperature value T, at this time control system judgement detect outer electromechanics flow valuve I and preset value I2Size and coil temperature value T and preset value T2
Size, I2For larger current, meet relations I2<I1And and I1Between difference it is smaller, T2For higher temperature, meet relationship T2<T1
And and T1Between difference it is smaller, work as I2≤I<I1And T2≤T<T1When, air-conditioning system is in that electric current is larger, the higher shape of temperature at this time
State, therefore control system control outdoor fan stops guarantees that the running environment of compressor is in that electric current is smaller, the lower shape of temperature
State.
Recovery condition one, as I < I2And T < T1When, outer electromechanical flow valuve at this time is smaller, as long as temperature is less than maximum temperature T1
, controller just controls outdoor fan and resumes work at this time.
Recovery condition two, as T < T2And I < I1When, coil temperature at this time is lower, as long as electric current is less than maximum current I1I.e.
Can, controller just controls outdoor motor and resumes work at this time.
If be unsatisfactory for recovery condition one and recovery condition two simultaneously, controller just persistently judges outer electromechanics flow valuve I and disk
Tube temperature angle value T, until meeting recovery condition one or restoring condition two, until control system control outdoor fan is resumed work.
The present invention adjusts the load of air-conditioning system, preferentially by the working condition of control outdoor fan in a heating mode
The working condition for guaranteeing compressor, avoids compressor from working at high temperature under high pressure and leads to chaser machine, service life reduction, presses
Contracting machine normal work then can persistently provide a user institute's calorific requirement, and user satisfaction is high.
Claims (3)
1. compressor protection method when a kind of air-conditioning heating high temperature and pressure, it is characterised in that: include the following steps,
S1, outer machine current maxima I1 and the larger value I2, and I2 < I1 are set in the controls in advance；Set coil temperature most
Big value T1 and the larger value T2, and T2 < T1；8A≤I1≤15A, 7A≤I2≤13A；Wherein, when rated cooling capacity is 5000W,
The I1 is 15A, I2 13A；
S2, under air-conditioning heating mode, the outer electromechanical flow valuve I of current sensor real-time detection, temperature sensor real-time detection coil pipe
Temperature value T, control system judge size between current detection value and current setting value and judge that temperature detection value is set with temperature
Size between definite value, specific judgment method are as follows:
1. control system issues instruction as I >=I1, stop powering to outdoor fan, outdoor fan stops working, and executes step
S3；
2. control system judges the size of coil temperature value T Yu setting value T1 as I<I1, as T>=T1, control system is issued
Instruction stops powering to outdoor fan, and outdoor fan stops working, and executes step S3；
3. control system judges the size and coil temperature value T of outer electromechanics flow valuve I and current setting value I2 as I < I1 and T < T1
With the size of desired temperature T2, as I2≤I < I1 and T2≤T < T1, control system issues instruction, stops supplying to outdoor fan
Electricity, outdoor fan stop working, and execute step S3；
S3, control system judge current detection value and whether temperature detection value meets recovery condition one or restore condition two,
The recovery condition one is, as I < I2 and T < T1, then control system issues instruction, restores to power to outdoor fan,
Outdoor fan is resumed work, return step S2；
The recovery condition two is, as T < T2 and I < I1, then control system issues instruction, restores to power to outdoor fan,
Outdoor fan is resumed work, return step S2.
2. compressor protection method when a kind of air-conditioning heating high temperature and pressure according to claim 1, it is characterised in that: 56
℃≤T1≤60℃。
3. compressor protection method when a kind of air-conditioning heating high temperature and pressure according to claim 1, it is characterised in that: 50
℃≤T2<54℃。
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| CN110077196A (en) * | 2019-04-17 | 2019-08-02 | 青岛海信电子设备股份有限公司 | A kind of air condition with camion and its control method |
| CN110044005A (en) * | 2019-05-08 | 2019-07-23 | 宁波奥克斯电气股份有限公司 | A kind of air conditioning control method, device and air-conditioning |
| CN113048681A (en) * | 2021-03-29 | 2021-06-29 | 深圳市深蓝电子股份有限公司 | Protection method and device for heat pump unit compressor |
| CN115031391B (en) * | 2022-05-26 | 2023-10-13 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and electronic equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106196494A (en) * | 2016-08-01 | 2016-12-07 | 珠海格力电器股份有限公司 | Complete machine overload control method and device |
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| KR0140062B1 (en) * | 1993-05-21 | 1998-07-01 | 김광호 | Overload control method of air conditioner |
| JPH1026391A (en) * | 1996-07-10 | 1998-01-27 | Fujitsu General Ltd | Method for controlling air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106196494A (en) * | 2016-08-01 | 2016-12-07 | 珠海格力电器股份有限公司 | Complete machine overload control method and device |
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