CN109855337A - A kind of Differential pressure control method, device and the equipment of effective protection compressor - Google Patents
A kind of Differential pressure control method, device and the equipment of effective protection compressor Download PDFInfo
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- CN109855337A CN109855337A CN201910123470.XA CN201910123470A CN109855337A CN 109855337 A CN109855337 A CN 109855337A CN 201910123470 A CN201910123470 A CN 201910123470A CN 109855337 A CN109855337 A CN 109855337A
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- pressure difference
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Abstract
The present invention discloses Differential pressure control method, device and the equipment of a kind of effective protection compressor.Wherein, this method comprises: the height pressure difference of monitoring compressor；Judge whether height pressure difference meets the first preset condition；If so, triggering compressor start emergency mechanism；Later, continue to judge whether height pressure difference meets the second preset condition；If so, triggering compressor is restored to the working condition before starting emergency mechanism.Through the invention, real-time monitoring height pressure difference starts compressor relative program protection mechanism when meeting the first preset condition, avoids compressor long-play under no oil condition, compressor is avoided to damage because of oil starvation.Continue real-time monitoring height pressure difference later and exit the protection mechanism when meeting the second preset condition, to guarantee the normal operation of compressor, guarantees the reliable fuel feeding of compressor, avoid the normal work for delaying integral device.
Description
Technical field
The present invention relates to machine set technology field, in particular to a kind of effective protection compressor Differential pressure control method,
Device and equipment.
Background technique
Refrigeration oil is that helical-lobe compressor must be used in normal work, and normal fuel injection must be by height pressure difference
It is able to achieve.When pressure difference is too low, it is easy to cause oil return unsmooth.If compressor of leaving is run under low voltage difference, compressor
Just operated under no oil condition, except the low this problem of efficiency outside, long-play under helical-lobe compressor oil starvation state will cause
Twin-screw " locking " due to oil starvation is even deformed, and is ultimately caused compressor and is thoroughly damaged.
Compressor pressure difference is too low in the prior art be easy to cause compressor to damage because of oil starvation aiming at the problem that, at present not yet
It puts forward effective solutions.
Summary of the invention
Differential pressure control method, device and the equipment of a kind of effective protection compressor are provided in the embodiment of the present invention, to solve
Compressor pressure difference too low the problem of being easy to cause compressor to damage because of oil starvation in the prior art.
In order to solve the above technical problems, the present invention provides a kind of compressor Differential pressure control methods, wherein this method packet
It includes: monitoring the height pressure difference of compressor；Judge whether the height pressure difference meets the first preset condition；It is full in the height pressure difference
After foot first preset condition, compressor start emergency mechanism is triggered；Later, continue to judge whether the height pressure difference meets
Second preset condition；After the height pressure difference meets second preset condition, triggers the compressor and be restored to starting and answer
Working condition before anxious mechanism.
Further, the height pressure difference of compressor is monitored, comprising: monitor the pressure at expulsion and pressure of inspiration(Pi) of the compressor
Power；The height pressure difference is determined according to the pressure at expulsion and the pressure of inspiration(Pi).
Further, judge whether the height pressure difference meets the first preset condition, comprising: judge that the height pressure difference is
No≤first preset value, and maintain the first preset time；If it is, determining that the height pressure difference meets the described first default item
Part.
Further, compressor start emergency mechanism is triggered, comprising: trigger the compressor and close.
Further, judge whether the height pressure difference meets the second preset condition, comprising: judge that the height pressure difference is
No the second preset value of >, and maintain the second preset time；Wherein, second preset value >=first preset value；If so,
Then determine that the height pressure difference meets second preset condition.
The present invention also provides a kind of compressor pressure difference control devices, wherein the device includes: pressure difference monitoring modular, is used
In the height pressure difference of monitoring compressor；First judgment module, for judging whether the height pressure difference meets the first preset condition；
First trigger module, for triggering compressor start emergency mechanism after the height pressure difference meets the first preset condition；Second
Judgment module judges whether the height pressure difference meets the second preset condition for continuing；Second trigger module, for described
After height pressure difference meets second preset condition, the work shape that the compressor is restored to before starting emergency mechanism is triggered
State.
Further, the pressure difference monitoring modular, comprising: monitoring unit, for monitoring the pressure at expulsion of the compressor
And pressure of inspiration(Pi)；Determination unit, for determining the height pressure difference according to the pressure at expulsion and the pressure of inspiration(Pi).
Further, the first judgment module is specifically used for whether judging the height pressure difference≤the first preset value, and
Maintain the first preset time；If it is, determining that the height pressure difference meets first preset condition.
Further, first trigger module is specifically used for triggering the compressor closing.
Further, second judgment module, be specifically used for judge the height pressure difference whether the second preset value of >, and
Maintain the second preset time；Wherein, second preset value >=first preset value；If it is, determining the high-low pressure
Difference meets second preset condition.
The present invention also provides a kind of equipment, wherein the equipment includes above-mentioned compressor pressure difference control device and compression
Machine.
The present invention also provides a kind of computer readable storage mediums, are stored thereon with computer program, which is characterized in that
Such as above-mentioned method is realized when described program is executed by processor.
It applies the technical scheme of the present invention, real-time monitoring height pressure difference starts compressor when meeting the first preset condition
Relative program protection mechanism avoids compressor long-play under no oil condition, compressor is avoided to damage because of oil starvation.Later
Continue real-time monitoring height pressure difference and exit the protection mechanism when meeting the second preset condition, to guarantee the normal fortune of compressor
Row guarantees the reliable fuel feeding of compressor, avoids the normal work for delaying integral device.
Detailed description of the invention
Fig. 1 is the flow chart of compressor Differential pressure control method according to an embodiment of the present invention；
Fig. 2 is refrigerant circulation schematic diagram according to an embodiment of the present invention；
Fig. 3 is the structural block diagram of compressor pressure difference control device according to an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning, " a variety of " generally comprise at least two.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
It will be appreciated that though default item may be described using term first, second, third, etc. in embodiments of the present invention
Part, but these should not necessarily be limited by these terms.These terms are only used to distinguish several different preset conditions.For example, not
In the case where being detached from range of embodiment of the invention, the first preset condition can also be referred to as the second preset condition, similarly, second
Preset condition can also be referred to as the first preset condition.
Depending on context, word as used in this " if ", " if " can be construed to " ... when " or
" when ... " or " in response to determination " or " in response to detection ".Similarly, context is depended on, phrase " if it is determined that " or " such as
Fruit detection (condition or event of statement) " can be construed to " when determining " or " in response to determination " or " when detection (statement
Condition or event) when " or " in response to detection (condition or event of statement) ".
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
Include, so that commodity or device including a series of elements not only include those elements, but also including not clear
The other element listed, or further include for this commodity or the intrinsic element of device.In the feelings not limited more
Under condition, the element that is limited by sentence "including a ...", it is not excluded that in the commodity or device for including the element also
There are other identical elements.
The alternative embodiment that the invention will now be described in detail with reference to the accompanying drawings.
Embodiment 1
Fig. 1 is the flow chart of compressor Differential pressure control method according to an embodiment of the present invention, and this method is applied to controller,
As shown in Figure 1, method includes the following steps:
Step S101, the height pressure difference of monitoring control devices compressor；
Step S102, controller judge whether height pressure difference meets the first preset condition；It is pre- to meet first in height pressure difference
If after condition, triggering compressor start emergency mechanism；
Step S103, controller continue to judge whether height pressure difference meets the second preset condition；Meet the in height pressure difference
After two preset conditions, triggering compressor is restored to the working condition before starting emergency mechanism.
Through this embodiment, controller real-time monitoring height pressure difference starts compressor phase when meeting the first preset condition
Programmed protection mechanism is closed, compressor long-play under no oil condition is avoided, compressor is avoided to damage because of oil starvation.It is subsequent
Continuous real-time monitoring height pressure difference exits the protection mechanism when meeting the second preset condition, to guarantee the normal fortune of compressor
Row guarantees the reliable fuel feeding of compressor, avoids the normal work for delaying integral device.
In above-mentioned steps S101, the pressure at expulsion and pressure of inspiration(Pi) of compressor are monitored first, later according to pressure at expulsion
Height pressure difference is determined with pressure of inspiration(Pi).Under normal circumstances, pressure at expulsion can be higher than pressure of inspiration(Pi), so, height pressure difference=exhaust
Pressure-pressure of inspiration(Pi).For the position of the monitoring point of pressure at expulsion and pressure of inspiration(Pi), followed below by the refrigerant introduced in Fig. 2
Ring schematic diagram is illustrated.
Fig. 2 is refrigerant circulation schematic diagram according to an embodiment of the present invention, as shown in Fig. 2, 1 is compressor, 2 be air cooling fin
Heat exchanger, 3 be throttling component, and 4 be shell and tube exchanger.In refrigeration refrigerant circulation, the high temperature and pressure that compressor 1 is discharged is cold
Medium gas body enters fin condenser 2, exchanges heat with air, and air absorbs refrigerant heat, and the cold media gas of high temperature and pressure becomes
The refrigerant liquid of high pressure medium temperature carries out throttling cooling by throttling component 3 later, and refrigerant becomes the refrigerant of low-pressure low-temperature at this time
Liquid exchanges heat into shell and tube exchanger 5 with water, and water absorbs the refrigerant liquid evaporation that refrigerant heat makes low-pressure low-temperature
And superheat state is formed, start next refrigerant circulation into compressor 1.Wherein, PL detects the pressure of inspiration(Pi) of compressor, PH inspection
The pressure at expulsion of measured compressed machine, and timely feedback to controller.
It, can be real using following preferred embodiment when controller judges whether height pressure difference meets the first preset condition
It is existing: whether to judge height pressure difference≤the first preset value, and maintain the first preset time；If it is, determining that height pressure difference meets
First preset condition.Specifically, the recommended minimum value X of one height pressure difference of controller inner setting (it is pre- to be referred to as first
If value), this value can be possible to change because of system or operating condition variation, and value is not unique.When certain time (first it is default when
Between) in when detecting that the height pressure difference of pressure at expulsion and pressure of inspiration(Pi) is less than or equal to the setting value, compressor start is met an urgent need machine
System, such as: controller triggering compression auto-shut-off.Based on this, when height pressure difference is not enough to normal fuel injection, compressor enters
Guard mode can be damaged to avoid compressor because of oil starvation, and compressor reliability, extension compressor service life are improved.
It, can be real using following preferred embodiment when controller judges whether height pressure difference meets the second preset condition
It is existing: judge height pressure difference whether the second preset value of >, and the second preset time of maintenance；Wherein, the second preset value >=the first is default
Value；If it is, determining that height pressure difference meets the second preset condition.Specifically, controller inner setting one height pressure difference
Recovery value Y (is referred to as the second preset value), this value can be possible to change because of system or operating condition variation, and value is not only
One.But second preset value is generally higher than the first preset value.Exhaust is detected when certain time (the second preset time) is interior
When the height pressure difference of pressure and pressure of inspiration(Pi) is greater than the recovery value, compressor exits emergency mechanism, such as: controller triggering compression
Machine Auto Power On.Based on this, height pressure difference be restored to can normal fuel injection state when, control compressor works normally, can be with
The reliable fuel feeding of compressor is effectively ensured, avoids the normal work for delaying integral device.
Table 1 gives a kind of preferred embodiment of technical solution of the present invention.
Table 1
Within the continuous T time (such as 20s), as PH-PL≤X, controller controls compressor and closes；
Within 0 time of continuous T (such as 10s), as PH-PL > X+50, controller control compressor voluntarily restores to start
Operation.
In addition to this case where, compressor keep current state.
Certainly, this numerical value of above-mentioned X+50 can be adjusted according to the actual situation.
Embodiment 2
Corresponding to the compressor Differential pressure control method of Fig. 1 introduction, a kind of compressor pressure difference control dress is present embodiments provided
It sets, the structural block diagram of compressor pressure difference control device as shown in Figure 3, which includes:
Pressure difference monitoring modular 10, for monitoring the height pressure difference of compressor；
First judgment module 20 is connected to pressure difference monitoring modular 10, for judging it is default whether height pressure difference meets first
Condition；
First trigger module 30, is connected to first judgment module 20, is used for after height pressure difference meets the first preset condition,
Trigger compressor start emergency mechanism；
Second judgment module 40 is connected to the first trigger module 30, judges whether height pressure difference meets second for continuing
Preset condition；
Second trigger module 50 is connected to the second judgment module 40, is used for after height pressure difference meets the second preset condition,
Triggering compressor is restored to the working condition before starting emergency mechanism.
Through this embodiment, real-time monitoring height pressure difference starts compressor relative program when meeting the first preset condition
Protection mechanism avoids compressor long-play under no oil condition, compressor is avoided to damage because of oil starvation.Continue later real-time
Monitoring height pressure difference exits the protection mechanism when meeting the second preset condition, to guarantee the normal operation of compressor, guarantees
The reliable fuel feeding of compressor, avoids the normal work for delaying integral device.
Preferably, above-mentioned pressure difference monitoring modular 10 may include: monitoring unit, for monitor compressor pressure at expulsion and
Pressure of inspiration(Pi)；Determination unit, for determining height pressure difference according to pressure at expulsion and pressure of inspiration(Pi).It, can be accurately and timely based on this
Grasp height pressure difference variation, thus in time to compressor open protection mechanism.
Preferably, above-mentioned first judgment module 20 is specifically used for whether judging height pressure difference≤the first preset value, and maintains
First preset time；If it is, determining that height pressure difference meets the first preset condition.Later, above-mentioned first trigger module 30 touches
Compressor is sent out to close.Based on this, when height pressure difference is not enough to normal fuel injection, compressor enters guard mode, can be to avoid pressure
Contracting machine is damaged because of oil starvation, improves compressor reliability, extension compressor service life.
Preferably, above-mentioned second judgment module 40, be specifically used for judge height pressure difference whether the second preset value of >, and maintenance
Second preset time；Wherein, the second preset value >=first preset value；If it is, determining that height pressure difference meets the second default item
Part.Illustrate at this time height pressure difference can normal fuel injection, the second trigger module 50 trigger compressor booting operation.Based on this, in height
When low voltage difference is restored to the state of energy normal fuel injection, control compressor is worked normally, and the reliable fuel feeding of compressor can be effectively ensured,
Avoid the normal work for delaying integral device.
The present embodiment additionally provides a kind of equipment, which includes compressor pressure difference control device and the compression of above-mentioned introduction
Machine, the compressor can be helical-lobe compressor.
Embodiment 3
The embodiment of the invention provides a kind of nonvolatile computer storage media, computer storage medium is stored with calculating
The compressor pressure difference controlling party in above-mentioned any means embodiment can be performed in machine executable instruction, the computer executable instructions
Method.
It is lower in height pressure difference from the above description it is found that according to the technical solution of the present invention, it is not enough to normal fuel injection
When, compressor is controlled in time and enters emergency protection mechanism, is avoided compressor from damaging because of oil starvation, is improved compressor reliability, prolong
The long compressor service life；Height pressure difference be increased to can normal fuel injection when, control compressor restore operate normally, guarantee compressor
The operating of whole unit is not delayed while reliable fuel feeding.
By the description of embodiment of above, those skilled in the art can be understood that each embodiment can borrow
Help software that the mode of required general hardware platform is added to realize, naturally it is also possible to pass through hardware.Based on this understanding, above-mentioned
Substantially the part that contributes to existing technology can be embodied in the form of software products technical solution in other words, the meter
Calculation machine software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions
With so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each embodiment
Or method described in certain parts of embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (12)
1. a kind of compressor Differential pressure control method, which is characterized in that the described method includes:
Monitor the height pressure difference of compressor；
Judge whether the height pressure difference meets the first preset condition；Meet first preset condition in the height pressure difference
Afterwards, compressor start emergency mechanism is triggered；
Later, continue to judge whether the height pressure difference meets the second preset condition；Meet described second in the height pressure difference
After preset condition, the working condition that the compressor is restored to before starting emergency mechanism is triggered.
2. the method according to claim 1, wherein the height pressure difference of monitoring compressor, comprising:
Monitor the pressure at expulsion and pressure of inspiration(Pi) of the compressor；
The height pressure difference is determined according to the pressure at expulsion and the pressure of inspiration(Pi).
3. the method according to claim 1, wherein judging whether the height pressure difference meets the first default item
Part, comprising:
Whether judge the height pressure difference≤the first preset value, and maintains the first preset time；
If it is, determining that the height pressure difference meets first preset condition.
4. the method according to claim 1, wherein triggering compressor start emergency mechanism, comprising:
The compressor is triggered to close.
5. according to the method described in claim 3, it is characterized in that, judging whether the height pressure difference meets the second default item
Part, comprising:
Judge the height pressure difference whether the second preset value of >, and maintain the second preset time；Wherein, second preset value >=
First preset value；
If it is, determining that the height pressure difference meets second preset condition.
6. a kind of compressor pressure difference control device, which is characterized in that described device includes:
Pressure difference monitoring modular, for monitoring the height pressure difference of compressor；
First judgment module, for judging whether the height pressure difference meets the first preset condition；
First trigger module, for triggering compressor start emergency mechanism after the height pressure difference meets the first preset condition；
Second judgment module judges whether the height pressure difference meets the second preset condition for continuing；
Second trigger module restores for after the height pressure difference meets second preset condition, triggering the compressor
Working condition to before starting emergency mechanism.
7. device according to claim 6, which is characterized in that the pressure difference monitoring modular, comprising:
Monitoring unit, for monitoring the pressure at expulsion and pressure of inspiration(Pi) of the compressor；
Determination unit, for determining the height pressure difference according to the pressure at expulsion and the pressure of inspiration(Pi).
8. device according to claim 6, which is characterized in that
The first judgment module is specifically used for whether judging the height pressure difference≤the first preset value, and maintains first to preset
Time；If it is, determining that the height pressure difference meets first preset condition.
9. device according to claim 6, which is characterized in that
First trigger module is specifically used for triggering the compressor closing.
10. device according to claim 8, which is characterized in that
Second judgment module, be specifically used for judge the height pressure difference whether the second preset value of >, and maintain second preset
Time；Wherein, second preset value >=first preset value；If it is, determining that the height pressure difference meets described
Two preset conditions.
11. a kind of equipment, which is characterized in that the equipment includes compressor pressure difference described in any one of claim 6 to 10
Control device and compressor.
12. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that described program is processed
The method as described in any one of claims 1 to 5 is realized when device executes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910123470.XA CN109855337A (en) | 2019-02-18 | 2019-02-18 | A kind of Differential pressure control method, device and the equipment of effective protection compressor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910123470.XA CN109855337A (en) | 2019-02-18 | 2019-02-18 | A kind of Differential pressure control method, device and the equipment of effective protection compressor |
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| CN110542255A (en) * | 2019-09-06 | 2019-12-06 | 珠海格力电器股份有限公司 | compressor oil return method, refrigeration system and air conditioner |
| CN114484759A (en) * | 2022-01-27 | 2022-05-13 | 青岛海尔空调电子有限公司 | Method and device for preventing compressor from desynchronizing and compressor |
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