CN104819547B - The detection of scarce fluorine and guard method and system during a kind of frequency-conversion air-conditioning system start - Google Patents
The detection of scarce fluorine and guard method and system during a kind of frequency-conversion air-conditioning system start Download PDFInfo
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- CN104819547B CN104819547B CN201510250634.7A CN201510250634A CN104819547B CN 104819547 B CN104819547 B CN 104819547B CN 201510250634 A CN201510250634 A CN 201510250634A CN 104819547 B CN104819547 B CN 104819547B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Air Conditioning Control Device (AREA)
Abstract
This application provides the detection of scarce fluorine during a kind of start of frequency-conversion air-conditioning system and guard method and system; this lacks the temperature-sensitive bag of fluorine detection and guard method and system in start by being arranged at import, the outlet of evaporator, indoor set and the outdoor unit of evaporator; and the pressure sensor on outer machine is set; evaporator temperature, evaporator outlet temperature, indoor temperature, outdoor environment temperature and outdoor condensing pressure are detected respectively, and is calculated and is assessed according to testing result.Progressively carry out lacking fluorine judgement when meeting preparatory condition; stop the operation of compressor and outer blower fan in time when judging that compressor is in and lacks fluorine state; so that frequency-conversion air-conditioning system can by it is long-term place or long-distance transportation after in start when detect whether scarce fluorine occur and protected, and then avoid compressor run under scarces fluorine state occur refrigerating efficiency lowly, compressor abrasion aggravates or burns.
Description
Technical field
The application is related to refrigeration technology field, scarce fluorine inspection when being started shooting more specifically to a kind of frequency-conversion air-conditioning system
Survey and guard method and system.
Background technology
Air-conditioning system typically has specified refrigerant injection rate, and system being capable of normal work in the range of certain injection rate
Make, if the coolant quantity in system is very few not only seriously to reduce refrigeration, can more aggravate compressor abrasion, or even can cause
Compressor burns.But, air-conditioning system by it is long-term place or long-distance transportation after refrigerant be possible to have certain let out
Dew, at this moment if direct start operation probably due to coolant quantity can not be up to standard and refrigeration that cause frequency-conversion air-conditioning system drops
Low, compressor abrasion aggravation is burnt.Can be too low by pressure of inspiration(Pi) for fixed frequency air conditioner, or the excessively high mode of pressure at expulsion is entered
The scarce fluorine detection of row, and frequency-conversion air-conditioning system changes due to compressor frequency, pressure of inspiration(Pi) and pressure at expulsion scope ratio are larger, it is impossible to
Carry out lacking fluorine judgement by the detection to pressure of inspiration(Pi) or pressure at expulsion.
The content of the invention
In view of this, the application provides the detection of scarce fluorine and guard method and the system when a kind of frequency-conversion air-conditioning system is started shooting,
For being protected when frequency-conversion air-conditioning system is started shooting after long-term placement or long-distance transportation to compressor, to avoid because lacking
Fluorine and cause refrigeration reduction, compressor abrasion aggravation or burn.
To achieve these goals, it is proposed that scheme it is as follows：
The detection of scarce fluorine and guard method during a kind of frequency-conversion air-conditioning system start, the frequency-conversion air-conditioning system include compression
Machine, condenser, electric expansion valve, evaporator and outer blower fan and pressure sensor, including：
After the frequency-conversion air-conditioning system start, during the compressor operating to original frequency, the convertible frequency air-conditioner system is detected
Each parameter of system, if the corresponding saturation temperature of condensing pressure that the pressure sensor is detected is less than or equal to outdoor environment temperature
Degree, then carry out lacking fluorine protection operation；Otherwise, if the evaporator outlet temperature of the evaporator is more than indoor temperature and first and preset
Difference between the difference of temperature, and the evaporator outlet temperature and the evaporator temperature of the evaporator is more than second
Preset temperature, and the outer machine pressure of outdoor unit is less than or equal to preset pressure, then carries out scarce fluorine and judge in advance；Otherwise normal fortune is kept
OK；
The scarce fluorine judges to include in advance：The current running frequency of the compressor is kept, by the electric expansion valve
Aperture turns down the first default aperture and continues the second preset duration, is closed if the current evaporator temperature is less than or equal to
The evaporator temperature and the difference of the 3rd preset temperature before small, then carry out lacking fluorine judgement；Otherwise further will be described
The aperture of electric expansion valve opens big to the described second default aperture from default initial opening, if the now current evaporator enters
Evaporator temperature and the 3rd preset temperature sum that mouth temperature is more than or equal to before action, then carry out scarce fluorine and judge,
Otherwise by the aperture regulation of the electric expansion valve to default initial opening, and the compressor and the outer blower fan is kept to carry out
Normal operation；
The scarce fluorine judges to include：The aperture of the electric expansion valve is maintained at the described second default aperture, control pressure
Running frequency regulation is arrived predeterminated frequency by contracting machine with normal lifting frequency speed, and runs the 3rd preset duration, if the pressure is passed
The corresponding saturation temperature of condensing pressure that sensor is detected is less than or equal to outdoor environment temperature, or, the evaporator outlet
The difference of temperature and the evaporator temperature is more than the 4th preset temperature and the evaporator outlet temperature is more than Indoor Temperature
The difference and the outer machine pressure of degree and first preset temperature are less than or equal to preset pressure, then judge the compressor
In scarce fluorine state, carry out lacking fluorine protection operation, otherwise, keep the compressor and the outer blower fan normally to be run；
The scarce fluorine protection includes：Close the compressor and the outer blower fan.
Optionally, first preset temperature is 1~3 degree Celsius, and second preset temperature is 10~18 degrees Celsius, institute
It is 1~3 degree Celsius to state the 3rd preset temperature, and the 4th preset temperature is 15~20 degrees Celsius；
The preset pressure is 1600~3300 kPas, and the described first default aperture is 150~300 steps, and described second is pre-
If aperture is 300~500 steps, the default initial opening is 150~300 steps；
Second preset duration is 1~3 minute, and the 3rd preset duration is 1~4 minute, and the predeterminated frequency is
50~90 hertz.
Optionally, in addition to：
Carry out every time after the scarce fluorine protection, record and show the fault-signal for representing and lacking fluorine state, and record failure time
The aperture of shown electric expansion valve is adjusted to the default initial opening after number, the 4th preset duration of pausing, institute is restarted
State compressor and the outer blower fan；
When the number of stoppages is more than or equal to the preset failure number of times upper limit, the compressor and the outer blower fan are protected
Hold in stopped status.
Optionally, the 4th preset duration is 1~6 minute, and the preset failure number of times upper limit is 3 times.
Optionally, when the variable frequency range of the compressor is 10~100 hertz：
First preset temperature is 3 degrees Celsius, and second preset temperature is 16 degrees Celsius, the 3rd preset temperature
For 2 degrees Celsius, the 4th preset temperature is 20 degrees Celsius；
Described first default aperture is 80 steps, and the described second default aperture is 500 steps, and the default initial opening is 150
Step；
The preset pressure is 3200 kPas, and second preset duration is 2 minutes, and the 3rd preset duration is 2 points
Clock, the 4th preset duration is 5 minutes, and the predeterminated frequency is 80 hertz.
The detection of scarce fluorine and protection system during a kind of frequency-conversion air-conditioning system start, the frequency-conversion air-conditioning system include compression
Machine, condenser, electric expansion valve, evaporator, outer blower fan and pressure sensor, including：
Open state detection module, for the frequency-conversion air-conditioning system start after, the compressor operating to initial frequency
During rate, respectively to evaporator temperature, evaporator outlet temperature, indoor temperature, outdoor environment temperature and outdoor condensation pressure
Power is detected, if the corresponding saturation temperature of condensing pressure that the pressure sensor is detected is less than or equal to outdoor environment temperature
Degree, then carry out lacking fluorine protection operation；Otherwise, if the evaporator outlet temperature of the evaporator is more than indoor temperature and first and preset
Difference between the difference of temperature, and the evaporator outlet temperature and the evaporator temperature of the evaporator is more than second
Preset temperature, and the outer machine pressure of outdoor unit is less than or equal to preset pressure, then carries out scarce fluorine and judge in advance；Otherwise normal fortune is kept
OK；
Lack the pre- determination module of fluorine, for keeping the current of the compressor according to the evaporator temperature detection signal
Running frequency, the aperture of the electric expansion valve is turned down into the first default aperture and continues the second preset duration, if current
The evaporator temperature that the evaporator temperature is less than or equal to before turning down and the difference of the 3rd preset temperature, then
Output lacks fluorine and judges signal；Otherwise the aperture of the electric expansion valve is further opened big to described second from default initial opening
Default aperture, if the evaporator temperature that is more than or equal to before action of the now current evaporator temperature with it is described
3rd preset temperature sum, then export the scarce fluorine and judge signal, otherwise by the aperture regulation of the electric expansion valve to presetting
Initial opening, and keep the compressor and the outer blower fan normally to be run；
Lack fluorine determination module, judge that the aperture of the electric expansion valve is maintained at described the by signal with according to the scarce fluorine
Running frequency regulation is arrived predeterminated frequency by two default apertures, control compressor with normal lifting frequency speed, and operation the 3rd is preset
Duration, if the corresponding saturation temperature of condensing pressure that the pressure sensor is detected is less than or equal to outdoor environment temperature, or
Person, the evaporator outlet temperature and the difference of the evaporator temperature are more than the 4th preset temperature and the evaporator
Outlet temperature is more than indoor temperature and the difference and outer machine pressure of first preset temperature are less than or equal to preset pressure, then
Judge that the compressor is in and lack fluorine state, output lacks fluorine protection signal, otherwise, keeps the compressor and the outer blower fan to enter
The normal operation of row；
Lack fluorine protection module, for closing the compressor and the outer blower fan according to the scarce fluorine protection signal.
Optionally, first preset temperature is 1~3 degree Celsius, and second preset temperature is 10~18 degrees Celsius, institute
It is 1~3 degree Celsius to state the 3rd preset temperature, and the 4th preset temperature is 15~20 degrees Celsius；
The preset pressure is 1600~3300 kPas, and the described first default aperture is 150~300 steps, and described second is pre-
If aperture is 300~500 steps, the default initial opening is 150~300 steps；
Second preset duration is 1~3 minute, and the 3rd preset duration is 1~4 minute, and the predeterminated frequency is
50~90 hertz.
Optionally, in addition to：
Determining module is protected, for after the scarce fluorine protection is carried out every time, recording and showing the event for representing and lacking fluorine state
Hinder signal, and record the number of stoppages, the aperture of shown electric expansion valve is adjusted to described default after the 4th preset duration of pausing
Initial opening, restarts the compressor and the outer blower fan；
When the number of stoppages is more than or equal to the preset failure number of times upper limit, the compressor and the outer blower fan are protected
Hold in stopped status.
Optionally, the 4th preset duration is 1~6 minute, and the preset failure number of times upper limit is 3 times.
Optionally, when the variable frequency range of the compressor is 10~100 hertz：
First preset temperature is 3 degrees Celsius, and second preset temperature is 16 degrees Celsius, the 3rd preset temperature
For 2 degrees Celsius, the 4th preset temperature is 20 degrees Celsius；
Described first default aperture is 80 steps, and the described second default aperture is 500 steps, and the default initial opening is 150
Step；
The preset pressure is 3200 kPas, and second preset duration is 2 minutes, and the 3rd preset duration is 2 points
Clock, the 4th preset duration is 5 minutes, and the predeterminated frequency is 80 hertz.
It can be seen from the above technical proposal that this application provides during a kind of start of frequency-conversion air-conditioning system scarce fluorine detection and
Guard method and system, this lacks fluorine detection and guard method and system in start by being arranged on the import of evaporator, evaporating
Temperature-sensitive bag at outlet, indoor set and the outdoor unit of device, and the pressure sensor on outer machine is set, evaporator is entered respectively
Mouthful temperature, evaporator outlet temperature, indoor temperature, outdoor environment temperature and outdoor condensing pressure detected, and according to inspection
Result is surveyed to be calculated and assessed.Progressively carry out lacking fluorine judgement when meeting preparatory condition, lack fluorine shape when judging that compressor is in
Stop the operation of compressor and outer blower fan during state in time, so that frequency-conversion air-conditioning system can be by placing or transporting over long distances for a long time
Detect whether scarce fluorine occur and protected in start after defeated, and then avoid compressor from running under scarce fluorine state to freeze
Inefficiency, compressor abrasion aggravation are burnt.
Brief description of the drawings
, below will be to embodiment or existing in order to illustrate more clearly of the embodiment of the present application or technical scheme of the prior art
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of application, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
The stream of the detection of scarce fluorine and guard method during a kind of frequency-conversion air-conditioning system start that Fig. 1 provides for the embodiment of the present application
Cheng Tu；
The detection of scarce fluorine and guard method during a kind of frequency-conversion air-conditioning system start that Fig. 2 provides for another embodiment of the application
Flow chart；
The detection of scarce fluorine and protection system during a kind of frequency-conversion air-conditioning system start that Fig. 3 provides for the another embodiment of the application
Schematic diagram；
The detection of scarce fluorine and protection system during a kind of frequency-conversion air-conditioning system start that Fig. 4 provides for the another embodiment of the application
Schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only some embodiments of the present application, rather than whole embodiments.It is based on
Embodiment in the application, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of the application protection.
Embodiment one
The stream of the detection of scarce fluorine and guard method during a kind of frequency-conversion air-conditioning system start that Fig. 1 provides for the embodiment of the present application
Cheng Tu.
The frequency-conversion air-conditioning system that the present embodiment is provided includes compressor, condenser and condensation fan, electric expansion valve, steaming
Send out the parts such as device and outer blower fan, in addition to gas-liquid separator, oil eliminator, reservoir, above-mentioned each parts by pipeline according to
It is secondary to connect into coolant circulating system, the outlet of import, evaporator in evaporator, indoor set and outdoor unit are provided with temperature-sensitive
Bag, for being detected to evaporator temperature, evaporator outlet temperature, indoor temperature and outdoor environment temperature, in system
High-pressure side, i.e. outdoor unit are disposed with pressure sensor, are detected for external machine pressure.It is empty of course for whole frequency conversion is ensured
The normal operation of adjusting system, in addition to compressor air-discharging temperature-sensitive bag, compression motor spindle oil temperature temperature-sensitive bag and some other position
Temperature-sensitive bag, and arrangement and the low-pressure lateral pressure sensor of system low-voltage side.
As shown in figure 1, the detection of scarce fluorine and guard method that the present embodiment is provided include following operation：
S101：The open state of frequency-conversion air-conditioning system is detected.
Evaporator temperature and evaporator outlet temperature respectively to evaporator, the outer machine pressure of outdoor unit and Indoor Temperature
Degree is detected, if the scarce fluorine that first carries out for meeting following conditions judges in advance, otherwise keeps frequency-conversion air-conditioning system normally to run,
Other operations are not done.
1) the corresponding saturation temperature of condensing pressure is less than or equal to outdoor environment temperature；
2) evaporator temperature is more than indoor temperature and the difference of the first preset temperature, and evaporator outlet temperature and steaming
The difference for sending out device inlet temperature is more than the second preset temperature, and the outer machine pressure of outdoor unit is less than or equal to preset pressure.
The second default aperture is 300~500 steps in each above-mentioned condition, and the first preset temperature is 1~3 degree Celsius, second
Preset temperature is 10~18 degrees Celsius, and preset pressure is 1600~3300 kPas, and it is 150~300 steps to preset initial opening.
S102：Scarce fluorine judges in advance.
Keep the current running frequency of compressor constant, the electronic expansion valve opening of electric expansion valve is turned down first and preset
Aperture simultaneously keeps the second preset duration, if the evaporator temperature that current evaporator temperature is less than or equal to before turning down
With the difference of the 3rd preset temperature, then carry out lacking fluorine decision；Otherwise, it is further that the aperture of electric expansion valve is first from presetting
Beginning aperture opens big to the second default aperture, if the evaporator that now current evaporator temperature is more than or equal to before action enters
Mouth temperature and the 3rd preset temperature sum, then it is same to carry out lacking fluorine decision, otherwise the aperture regulation of electric expansion valve is arrived
Default initial opening, and keep the current operating conditions of frequency-conversion air-conditioning system, that is, keep compressor and outer blower fan normally to run.
The first default aperture is 50~150 steps in this step, and the second preset duration is 1~3 minute, and the 3rd preset temperature is
1~3 degree Celsius, it is 150~300 steps to preset initial opening.
S103：Lack fluorine to judge.
Electronic expansion valve opening is kept or be adjusted to the second default aperture, and controls compressor with normal lifting frequency speed
Running frequency is adjusted to predeterminated frequency from default original frequency, the 3rd preset duration is kept after regulation to predeterminated frequency.If pressure
The corresponding saturation temperature of condensing pressure that force snesor is detected is less than or equal to outdoor environment temperature, or evaporator outlet temperature
The difference spent with evaporator temperature is more than the 4th preset temperature and evaporator outlet temperature is pre- more than indoor temperature and first
If the difference of temperature and outer machine pressure are less than or equal to preset pressure, then judge that the compressor is in and lack fluorine state, carry out lacking fluorine
Protection operation, otherwise judges that the compressor fluorine amount is normal, now keeps compressor and the blower fan normally to be run.
Predeterminated frequency is 50~90 hertz, and the 3rd preset duration is 1~4 minute, the 4th 15~20 degrees Celsius of preset temperature.
S104：Lack fluorine protection.
When it is to lack fluorine state that compressor is determined in scarce fluorine determination step, compressor and exogenous wind office are closed, corresponding
Display device on show corresponding fault cues, and send alarm, to point out the user of the frequency-conversion air-conditioning system to note,
Enable to obtain corresponding warning message in advance, to be operated or to be disposed accordingly, and then avoid compressor from lacking for a long time
Fluorine runs and causes refrigerating efficiency lowly or even burn out compressor.
It can be seen from the above technical proposal that scarce fluorine detection when present embodiments providing a kind of frequency-conversion air-conditioning system start
And guard method, this lacks fluorine detection and guard method in start by being arranged on the import, the outlet of evaporator, room of evaporator
Temperature-sensitive bag at interior machine and outdoor unit, and the pressure sensor on outer machine is set, respectively to evaporator temperature, evaporation
Device outlet temperature, indoor temperature, outdoor environment temperature and outdoor condensing pressure are detected, and are counted according to testing result
Calculate and assess.Progressively carry out lacking fluorine judgement when meeting preparatory condition, stop in time when judging that compressor is in and lacks fluorine state
The operation of compressor and outer blower fan, so that frequency-conversion air-conditioning system can be after long-term placement or long-distance transportation in start
Detect whether scarce fluorine occur and protected, and then avoid compressor from being run under scarce fluorine state occur that refrigerating efficiency is low, pressure
Contracting machine abrasion aggravation is burnt.
Embodiment two
The detection of scarce fluorine and guard method during a kind of frequency-conversion air-conditioning system start that Fig. 2 provides for another embodiment of the application
Flow chart.
As shown in Fig. 2 the detection of scarce fluorine and guard method that the present embodiment is provided comprise the following steps：
S201：The open state of frequency-conversion air-conditioning system is detected.
Evaporator temperature and evaporator outlet temperature respectively to evaporator, the outer machine pressure of outdoor unit and Indoor Temperature
Degree is detected, if the scarce fluorine that first carries out for meeting following conditions judges in advance, otherwise keeps frequency-conversion air-conditioning system normally to run,
Other operations are not done.
1) the corresponding saturation temperature of condensing pressure is less than or equal to outdoor environment temperature；
2) evaporator temperature is more than indoor temperature and the difference of the first preset temperature, and evaporator outlet temperature and steaming
The difference for sending out device inlet temperature is more than the second preset temperature, and the outer machine pressure of outdoor unit is less than or equal to preset pressure.
The second default aperture is 300~500 steps in each above-mentioned condition, and the first preset temperature is 1~3 degree Celsius, second
Preset temperature is 10~18 degrees Celsius, and preset pressure is 1600~3300 kPas.
S202：Scarce fluorine judges in advance.
Keep the current running frequency of compressor constant, the electronic expansion valve opening of electric expansion valve is turned down first and preset
Aperture simultaneously keeps the second preset duration, if the evaporator temperature that current evaporator temperature is less than or equal to before turning down
With the difference of the 3rd preset temperature, then carry out lacking fluorine decision；Otherwise, it is further that the aperture of electric expansion valve is first from presetting
Beginning aperture opens big to the second default aperture, if the evaporator that now current evaporator temperature is more than or equal to before action enters
Mouth temperature and the 3rd preset temperature sum, then it is same to carry out lacking fluorine decision, otherwise the aperture regulation of electric expansion valve is arrived
Default initial opening, and keep the current operating conditions of frequency-conversion air-conditioning system, that is, keep compressor and outer blower fan normally to run.
The first default aperture is 50~150 steps in this step, and the second preset duration is 1~3 minute, and the 3rd preset temperature is
1~3 degree Celsius, it is 150~300 steps to preset initial opening.
S203：Lack fluorine to judge.
Electronic expansion valve opening is kept or be adjusted to the second default aperture, and controls compressor with normal lifting frequency speed
Running frequency is adjusted to predeterminated frequency from default original frequency, the 3rd preset duration is kept after regulation to predeterminated frequency.If pressure
The corresponding saturation temperature of condensing pressure that force snesor is detected is less than or equal to outdoor environment temperature, or evaporator outlet temperature
The difference spent with evaporator temperature is more than the 4th preset temperature and evaporator outlet temperature is pre- more than indoor temperature and first
If the difference of temperature and outer machine pressure are less than or equal to preset pressure, then judge that the compressor is in and lack fluorine state, carry out lacking fluorine
Protection operation, otherwise judges that the compressor fluorine amount is normal, now keeps compressor and the blower fan normally to be run.
Predeterminated frequency is 50~90 hertz, and the 3rd preset duration is 1~4 minute, the 4th 15~20 degrees Celsius of preset temperature.
S204：Lack fluorine protection.
When it is to lack fluorine state that compressor is determined in scarce fluorine determination step, compressor and exogenous wind office are closed, corresponding
Display device on show corresponding fault cues, and send alarm, to point out the user of the frequency-conversion air-conditioning system to note,
Enable to obtain corresponding warning message in advance, to be operated or to be disposed accordingly, and then avoid compressor from lacking for a long time
Fluorine runs and causes refrigerating efficiency lowly or even burn out compressor.
S205：Protection is determined.
It is found through experiments that, when being protected by above-mentioned steps to lacking fluorine, sometimes it is possible that wrong report, is at this moment needed
It is repeated several times and is detected to exclude the possibility of wrong report, therefore, takes following operation：
After first appearance lacks fluorine protection, the fault-signal for representing and lacking fluorine state is recorded and shown, this event is then recorded
Barrier.Start operation again after compressor and the preset duration of outer fan parking the 4th, shuts down again after there is not abnormal scarce fluorine failure
And increase a record, if the accumulative number of stoppages, which reaches, determines to occur really scarce fluorine state after the preset failure number of times upper limit,
Now compressor and exogenous wind office are closed, no longer start operation.
The 4th preset duration is 1~6 minute, the preset failure number of times upper limit preferably 3 times in this step.By aforesaid operations,
The possibility of wrong report, the reliability of increase this method work can effectively be discharged.
Embodiment three
The present embodiment by by a compressor frequency scope for exemplified by 10~100 hertz of R410A units, wherein expansion valve
The second default aperture be 500 steps.Determine that the first preset temperature is 3 degrees Celsius, the second preset temperature by unit test data
For 16 degrees Celsius, the 3rd preset temperature is 2 degrees Celsius, and the 4th preset temperature is 20 degrees Celsius, and preset pressure is 3200kPa.Root
Default initial opening is set as 150 steps according to experience, the first default aperture is 80 steps, the second preset duration is 2 minutes, and the 3rd presets
Shi Changwei 2 minutes, the 4th preset duration is 5 minutes, and predeterminated frequency is 80 hertz.
Unit is manually booted, after compressor reaches that default 40 hertz of operations of original frequency terminate for three minutes, is detected now
The pressure sensor that unit is arranged on condenser obtains current condensing pressure for 2300 kPas, is calculated by built-in controller
It it is 38 degrees Celsius to the corresponding saturation temperature of the condensing pressure, 40 degrees Celsius are compared with current outdoor environment temperature, condenser pressure
The corresponding saturation temperature of power is less than outdoor environment temperature, then can determine whether to lack fluorine, close compressor and outer blower fan, and in display screen
Upper display lacks fluorine failure.After shutting down 5 minutes, counted by controller and judge whether continuous three appearance lack fluorine failure to unit,
Here to lack fluorine protection for the first time, therefore compressor restarts, and according to the preparation before compressor start by expansion valve opening,
Open to the step of initial opening 150, compressor start.
Compressor reaches 40 hertz after being again started up, after operation terminates for three minutes, and scarce fluorine protection is re-started at the moment
Judge.Pressure sensor detects current condensing pressure for 2850 kPas, and correspondence saturation temperature is 45 degrees Celsius, is detected now
Outdoor environment temperature is 40 degrees Celsius, then is unsatisfactory for the corresponding saturation temperature of condenser pressure less than outdoor environment temperature.Unit
The evaporator temperature for detecting evaporator simultaneously is 10 degrees Celsius, evaporator outlet temperature is 27 degrees Celsius, return air temperature is
28 degrees Celsius, now evaporator outlet temperature >=(- 3 DEG C of return air temperature), (evaporator outlet temperature-evaporator temperature) >=
10 degrees Celsius, and outer machine pressure is less than or equal to 3200 kPas.Then compressor frequency keeps constant, Current electronic expansion valve 340
Step, reduces 80 steps under current aperture, is adjusted to 260 steps, and the evaporator inlet pipe temperature detected now is 9 degrees Celsius, that is, is steamed
Send out inlet pipe temperature≤(- 2 degrees Celsius of action front evaporator inlet pipe temperature) invalid.Expansion valve is opened to the step of maximum opening 500, operation
2 minutes, evaporator inlet pipe temperature was 13 degrees Celsius.Compressor raising frequency is to 80 hertz, and electronic expansion valve opening keeps constant, operation
2 minutes, detect condensing pressure be 2900 kPas, outdoor environment temperature be 40 degrees Celsius.Then continue to detect return air temperature, evaporation
Device inlet pipe temperature, evaporator outlet pipe temperature, respectively 29 degrees Celsius, 7 degrees Celsius and 28 degrees Celsius, and pressure sensor detection pressure
Power is 2900 kPas, now lacks fluorine failure and sets up again, and display screen, which is shown, lacks fluorine failure, while compressor and outer blower fan stop.
Shut down 5 minutes, be judged as lacking fluorine failure for the second time in succession, compressor is again started up.
Compressor reaches 40 hertz after being again started up, at the end of 40 hertz are run three minutes, judges into next round, if
Similar described above meet again lacks fluorine protective condition, then compressor shutdown is not then turned on
Example IV
The detection of scarce fluorine and protection system during a kind of frequency-conversion air-conditioning system start that Fig. 3 provides for the another embodiment of the application
Schematic diagram.
As shown in figure 3, the detection of scarce fluorine and protection system that the present embodiment is provided include：Open state detection module 10, lack
The pre- determination module 20 of fluorine, scarce fluorine determination module 30 and scarce fluorine protection module 40.
Open state detection module 10 is for evaporator temperature and evaporator outlet temperature respectively to evaporator, room
Outer machine pressure, outdoor temperature and the indoor temperature of outer machine are detected, if meeting first exporting for following conditions lacks fluorine anticipation
Determine signal, otherwise keep frequency-conversion air-conditioning system normally to run, other operations are not done.
1) the corresponding saturation temperature of condensing pressure is less than or equal to outdoor temperature.
2) evaporator temperature is more than indoor temperature and the difference of the first preset temperature；And evaporator outlet temperature and steaming
The difference for sending out device inlet temperature is more than the second preset temperature；And the outer machine pressure of outdoor unit is less than or equal to preset pressure.
First time preset duration is 10 minutes in each above-mentioned condition, and the second default aperture is 300~500 steps, and first is pre-
If temperature is 1~3 degree Celsius, the second preset temperature is 10~18 degrees Celsius, and preset pressure is 1600~3300 kPas, is preset just
Beginning aperture is 150~300 steps.
Lacking the pre- determination module 20 of fluorine is used for after open state detection signal is received, and keeps the operation frequency of compressor currently
Rate is constant, and the electronic expansion valve opening of electric expansion valve is turned down into the first default aperture and the second preset duration is kept, if currently
The difference of evaporator temperature and the 3rd preset temperature that is less than or equal to before turning down of evaporator temperature, then export and lack
Fluorine judges signal；Otherwise, the aperture of electric expansion valve is further opened big to the second default aperture from default initial opening, if this
The evaporator temperature that Shi Dangqian evaporator temperature is more than or equal to before action and the 3rd preset temperature sum, then together
Sample output lacks fluorine and judges signal, otherwise by the aperture regulation of electric expansion valve to default initial opening, and keeps convertible frequency air-conditioner system
The current operating conditions of system, that is, keep compressor and outer blower fan normally to run.
First default aperture is 50~150 steps, and the second preset duration is 1~3 minute, and the 3rd preset temperature is 1~3 Celsius
Degree, it is 150~300 steps to preset initial opening.
Lacking fluorine determination module 30 is used to judge that signal progress lacks fluorine and judged in advance according to scarce fluorine.
Electronic expansion valve opening is kept or be adjusted to the second default aperture first, and controls compressor with normal lifting frequency
Speed adjusts running frequency to predeterminated frequency from default original frequency, and the 3rd preset duration is kept after regulation to predeterminated frequency.
If the corresponding saturation temperature of condensing pressure that pressure sensor is detected is less than or equal to outdoor environment temperature, or evaporator goes out
The difference of mouthful temperature and evaporator temperature is more than the 4th preset temperature and evaporator outlet temperature is more than indoor temperature and the
The difference of one preset temperature and outer machine pressure are less than or equal to preset pressure, then judge that the compressor is in and lack fluorine state, and defeated
Fall vacant fluorine protection signal, otherwise judge that the compressor fluorine amount is normal, now keep compressor and the blower fan normally to be run.
Predeterminated frequency is 50~90 hertz, and the 3rd preset duration is 1~4 minute, the 4th 15~20 degrees Celsius of preset temperature.
Lacking fluorine protection module 40 is used to be closed compressor and exogenous wind office according to scarce fluorine protection signal, and is shown accordingly
Corresponding fault cues are shown on device, and send alarm, to point out the user of the frequency-conversion air-conditioning system to note, are made it
It is enough to obtain corresponding warning message in advance, to be operated or to be disposed accordingly, and then avoid compressor from lacking fluorine operation for a long time
And cause refrigerating efficiency lowly or even burn out compressor.
It can be seen from the above technical proposal that this application provides during a kind of start of frequency-conversion air-conditioning system scarce fluorine detection and
Protection system, this lack fluorine detection and protection system in start by being arranged on the import of evaporator, it is the exporting of evaporator, indoor
Temperature-sensitive bag at machine and outdoor unit, and the pressure sensor on outer machine is set, respectively to evaporator temperature, evaporator
Outlet temperature, indoor temperature, outdoor environment temperature and outdoor condensing pressure are detected, and are calculated according to testing result
And assessment.Progressively carry out lacking fluorine judgement when meeting preparatory condition, stop pressing in time when judging that compressor is in and lacks fluorine state
The operation of contracting machine and outer blower fan, so that frequency-conversion air-conditioning system can be examined after long-term placement or long-distance transportation in start
Survey whether there is scarce fluorine and protected, and then avoid compressor run under scarces fluorine state occur refrigerating efficiency lowly, compress
Machine abrasion aggravation is burnt.
Embodiment five
The detection of scarce fluorine and protection system during a kind of frequency-conversion air-conditioning system start that Fig. 4 provides for the another embodiment of the application
Schematic diagram.
As shown in figure 4, the detection of scarce fluorine and protection system that the present embodiment is provided are set up on the basis of a upper embodiment
Protection determining module 50.
It is found through experiments that, when being protected by above-mentioned steps to lacking fluorine, sometimes it is possible that wrong report, is at this moment needed
It is repeated several times and is detected to exclude the possibility of wrong report, this operational module is set up for this.
Protection determining module 50 is used to after occurring scarce fluorine protection for the first time, record and show the failure letter for representing scarce fluorine state
Number, then record this failure.Start operation again after compressor and the preset duration of outer fan parking the 4th, does not occur abnormal scarce
Shut down again after fluorine failure and increase a record, if the accumulative number of stoppages, which reaches, determines occur after the preset failure number of times upper limit
Really scarce fluorine state, now closes compressor and exogenous wind office, no longer start operation.
4th preset duration is 1~6 minute, the preset failure number of times upper limit preferably 3 times., can be effective by aforesaid operations
Discharge the possibility of wrong report, the reliability of increase the system work.
The embodiment of each in this specification is described by the way of progressive, and what each embodiment was stressed is and other
Between the difference of embodiment, each embodiment identical similar portion mutually referring to.To the upper of the disclosed embodiments
State bright, professional and technical personnel in the field is realized or use the application.To a variety of modifications of these embodiments to ability
It will be apparent for the professional and technical personnel in domain, generic principles defined herein can not depart from the application's
In the case of spirit or scope, realize in other embodiments.Therefore, the application be not intended to be limited to it is shown in this article these
Embodiment, and it is to fit to the most wide scope consistent with features of novelty with principles disclosed herein.
Claims (10)
1. the detection of scarce fluorine and guard method during a kind of start of frequency-conversion air-conditioning system, the frequency-conversion air-conditioning system include compressor,
Condenser, electric expansion valve, evaporator and outer blower fan and pressure sensor, it is characterised in that including：
After the frequency-conversion air-conditioning system start, during the compressor operating to original frequency, the frequency-conversion air-conditioning system is detected
Each parameter, if the corresponding saturation temperature of condensing pressure that the pressure sensor is detected is less than or equal to outdoor environment temperature,
Then carry out lacking fluorine protection operation；Otherwise, if the evaporator outlet temperature of the evaporator is more than indoor temperature and the first default temperature
It is pre- that difference between the difference of degree, and the evaporator outlet temperature and the evaporator temperature of the evaporator is more than second
If temperature, and the outer machine pressure of outdoor unit is less than or equal to preset pressure, then carries out scarce fluorine and judge in advance；Otherwise normal fortune is kept
OK；
The scarce fluorine judges to include in advance：The current running frequency of the compressor is kept, by the aperture of the electric expansion valve
Turn down the first default aperture and continue the second preset duration, if the current evaporator temperature is less than or equal to before turning down
The evaporator temperature and the 3rd preset temperature difference, then carry out lacking fluorine and judge；Otherwise further by the electronics
The aperture of expansion valve opens big to the described second default aperture from default initial opening, if the now current evaporator temperature
The evaporator temperature that degree is more than or equal to before action and the 3rd preset temperature sum, then progress lack fluorine and judged, otherwise
By the aperture regulation of the electric expansion valve to default initial opening, and it is normal to keep the compressor and the outer blower fan to carry out
Operation；
The scarce fluorine judges to include：The aperture of the electric expansion valve is maintained at the described second default aperture, compressor is controlled
Running frequency regulation is arrived by predeterminated frequency with normal lifting frequency speed, and runs the 3rd preset duration, if the pressure sensor
The corresponding saturation temperature of condensing pressure detected is less than or equal to outdoor environment temperature, or, the evaporator outlet temperature
Be more than the 4th preset temperature with the difference of the evaporator temperature and the evaporator outlet temperature be more than indoor temperature with
The difference of first preset temperature and the outer machine pressure are less than or equal to preset pressure, then judge that the compressor is in
Lack fluorine state, carry out lacking fluorine protection operation, otherwise, keep the compressor and the outer blower fan normally to be run；
The scarce fluorine protection includes：Close the compressor and the outer blower fan.
2. scarce fluorine detection and guard method as claimed in claim 1, it is characterised in that first preset temperature is taken the photograph for 1~3
Family name's degree, second preset temperature is 10~18 degrees Celsius, and the 3rd preset temperature is 1~3 degree Celsius, and the described 4th presets
Temperature is 15~20 degrees Celsius；
The preset pressure is 1600~3300 kPas, and the described first default aperture is 150~300 steps, and described second default opens
Spend for 300~500 steps, the default initial opening is 150~300 steps；
Second preset duration be 1~3 minute, the 3rd preset duration be 1~4 minute, the predeterminated frequency be 50~
90 hertz.
3. scarce fluorine detection and guard method as claimed in claim 1 or 2, it is characterised in that also include：
Carry out every time after the scarce fluorine protection, record and show the fault-signal for representing and lacking fluorine state, and record the number of stoppages, stop
The aperture of shown electric expansion valve is adjusted to the default initial opening after the 4th preset duration of pausing, the compression is restarted
Machine and the outer blower fan；
When the number of stoppages is more than or equal to the preset failure number of times upper limit, the compressor and the outer blower fan are maintained at
Stopped status.
4. scarce fluorine detection and guard method as claimed in claim 3, it is characterised in that the 4th preset duration is 1~6 point
Clock, the preset failure number of times upper limit is 3 times.
5. scarce fluorine detection and guard method as claimed in claim 4, it is characterised in that the variable frequency range of the compressor is 10
At~100 hertz：
First preset temperature is 3 degrees Celsius, and second preset temperature is 16 degrees Celsius, and the 3rd preset temperature is 2
Degree Celsius, the 4th preset temperature is 20 degrees Celsius；
Described first default aperture is 80 steps, and the described second default aperture is 500 steps, and the default initial opening is 150 steps；
The preset pressure is 3200 kPas, and second preset duration is 2 minutes, and the 3rd preset duration is 2 minutes, institute
It is 5 minutes to state the 4th preset duration, and the predeterminated frequency is 80 hertz.
6. the detection of scarce fluorine and protection system during a kind of start of frequency-conversion air-conditioning system, the frequency-conversion air-conditioning system include compressor,
Condenser, electric expansion valve, evaporator, outer blower fan and pressure sensor, it is characterised in that including：
Open state detection module, for the frequency-conversion air-conditioning system start after, during the compressor operating to original frequency,
Evaporator temperature, evaporator outlet temperature, indoor temperature, outdoor environment temperature and outdoor condensing pressure are carried out respectively
Detection, if the corresponding saturation temperature of condensing pressure that the pressure sensor is detected is less than or equal to outdoor environment temperature,
Carry out lacking fluorine protection operation；Otherwise, if the evaporator outlet temperature of the evaporator is more than indoor temperature and the first preset temperature
Difference, and difference between the evaporator outlet temperature and the evaporator temperature of the evaporator is more than second and presets
Temperature, and the outer machine pressure of outdoor unit is less than or equal to preset pressure, then carries out scarce fluorine and judge in advance；Otherwise normal operation is kept；
Lack the pre- determination module of fluorine, the current fortune for keeping the compressor according to the evaporator temperature detection signal
Line frequency, turns down the first default aperture by the aperture of the electric expansion valve and continues the second preset duration, if current is described
The evaporator temperature that evaporator temperature is less than or equal to before turning down and the difference of the 3rd preset temperature, then export
Lack fluorine and judge signal；Otherwise further the aperture of the electric expansion valve is opened from default initial opening and preset to described second greatly
Aperture, if the evaporator temperature and the described 3rd that the now current evaporator temperature is more than or equal to before action
Preset temperature sum, then export the scarce fluorine and judge signal, otherwise that the aperture regulation of the electric expansion valve is initial to presetting
Aperture, and keep the compressor and the outer blower fan normally to be run；
Lack fluorine determination module, it is pre- with judging that the aperture of the electric expansion valve is maintained at described second by signal according to the scarce fluorine
If aperture, running frequency regulation is arrived predeterminated frequency, and the 3rd preset duration of operation by control compressor with normal lifting frequency speed,
If the corresponding saturation temperature of condensing pressure that the pressure sensor is detected is less than or equal to outdoor environment temperature, or, institute
State evaporator outlet temperature and the difference of the evaporator temperature is more than the 4th preset temperature and the evaporator outlet temperature
Degree is more than indoor temperature and the difference and outer machine pressure of first preset temperature are less than or equal to preset pressure, then judges institute
State compressor and be in and lack fluorine state, output lacks fluorine protection signal, otherwise, keep the compressor and the outer blower fan to carry out normal
Operation；
Lack fluorine protection module, for closing the compressor and the outer blower fan according to the scarce fluorine protection signal.
7. scarce fluorine is detected and protection system as claimed in claim 6, it is characterised in that first preset temperature is taken the photograph for 1~3
Family name's degree, second preset temperature is 10~18 degrees Celsius, and the 3rd preset temperature is 1~3 degree Celsius, and the described 4th presets
Temperature is 15~20 degrees Celsius；
The preset pressure is 1600~3300 kPas, and the described first default aperture is 150~300 steps, and described second default opens
Spend for 300~500 steps, the default initial opening is 150~300 steps；
Second preset duration be 1~3 minute, the 3rd preset duration be 1~4 minute, the predeterminated frequency be 50~
90 hertz.
8. scarce fluorine detection as claimed in claims 6 or 7 and protection system, it is characterised in that also include：
Determining module is protected, the failure letter for lacking fluorine state is represented for after the scarce fluorine protection is carried out every time, recording and showing
Number, and record the number of stoppages, the aperture of shown electric expansion valve is adjusted to described default initial after the 4th preset duration of pausing
Aperture, restarts the compressor and the outer blower fan；
When the number of stoppages is more than or equal to the preset failure number of times upper limit, the compressor and the outer blower fan are maintained at
Stopped status.
9. scarce fluorine is detected and protection system as claimed in claim 8, it is characterised in that the 4th preset duration is 1~6 point
Clock, the preset failure number of times upper limit is 3 times.
10. scarce fluorine detection and guard method as claimed in claim 9, it is characterised in that the variable frequency range of the compressor is
At 10~100 hertz：
First preset temperature is 3 degrees Celsius, and second preset temperature is 16 degrees Celsius, and the 3rd preset temperature is 2
Degree Celsius, the 4th preset temperature is 20 degrees Celsius；
Described first default aperture is 80 steps, and the described second default aperture is 500 steps, and the default initial opening is 150 steps；
The preset pressure is 3200 kPas, and second preset duration is 2 minutes, and the 3rd preset duration is 2 minutes, institute
It is 5 minutes to state the 4th preset duration, and the predeterminated frequency is 80 hertz.
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| CN105928156B (en) * | 2016-05-12 | 2018-08-07 | 广东美的制冷设备有限公司 | Coolant leakage detection method, coolant leakage detection device and air conditioner |
| DE102016110585A1 (en) * | 2016-06-08 | 2017-12-14 | Truma Gerätetechnik GmbH & Co. KG | Air conditioning system and leak detection method in an air conditioning system |
| WO2017219230A1 (en) * | 2016-06-21 | 2017-12-28 | 马玉琴 | Air conditioner and refrigerant leakage detecting method therefor |
| CN106568223B (en) * | 2016-10-25 | 2019-07-30 | 珠海格力电器股份有限公司 | A kind of control method, device and the air-conditioning of the refrigerant circulation exception of air-conditioning |
| CN106594973A (en) * | 2016-11-14 | 2017-04-26 | 珠海格力电器股份有限公司 | Method and device for detecting refrigerant of air-conditioning system as well as air conditioner |
| US10767881B2 (en) | 2017-03-30 | 2020-09-08 | Gd Midea Air-Conditioning Equipment Co., Ltd. | Method and device for controlling a compressor |
| CN107084473B (en) * | 2017-03-30 | 2020-05-22 | 广东美的制冷设备有限公司 | Compressor control method and device |
| CN107525208A (en) * | 2017-07-10 | 2017-12-29 | 珠海格力电器股份有限公司 | Lack of fluorine of air-conditioners detection method and device |
| CN107300279B (en) * | 2017-08-09 | 2019-03-22 | 珠海格力电器股份有限公司 | For detecting the method determined frequency cooling by wind and lack refrigerant |
| CN109210698B (en) * | 2018-09-10 | 2020-11-03 | 青岛海尔空调器有限总公司 | Control method for air conditioner freezing protection |
| CN109323401A (en) * | 2018-09-30 | 2019-02-12 | 广东美的制冷设备有限公司 | For the processing method and processing unit and equipment after the blocking of air-conditioner throttling device |
| CN111365824B (en) * | 2018-12-26 | 2021-09-24 | 青岛海尔空调电子有限公司 | Air conditioner fluorine deficiency judgment method and control method |
| CN110779183B (en) * | 2019-11-12 | 2021-12-14 | 广州华凌制冷设备有限公司 | Operation control method and device, air conditioner and storage medium |
| CN112178978B (en) * | 2020-10-15 | 2022-04-12 | 广东纽恩泰新能源科技发展有限公司 | Protection control method for overhigh exhaust temperature of variable frequency heat pump |
| CN112378134B (en) * | 2020-11-20 | 2021-09-14 | 珠海格力电器股份有限公司 | Refrigerator and refrigerant leakage detection method thereof |
| CN115077062B (en) * | 2022-06-10 | 2023-09-08 | 宁波奥克斯电气股份有限公司 | Fluorine-deficiency prompting control method and device for multi-connected air conditioner and air conditioner |
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