CN109098958B - Positive displacement compressor, positive displacement compressor cut cylinder control method and medium - Google Patents
Positive displacement compressor, positive displacement compressor cut cylinder control method and medium Download PDFInfo
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- CN109098958B CN109098958B CN201810963131.8A CN201810963131A CN109098958B CN 109098958 B CN109098958 B CN 109098958B CN 201810963131 A CN201810963131 A CN 201810963131A CN 109098958 B CN109098958 B CN 109098958B
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- Prior art keywords
- positive displacement
- cylinder
- transfiguration
- displacement compressor
- pressure
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
Abstract
The present invention provides a kind of positive displacement compressor, positive displacement compressors to cut cylinder control method and medium.Wherein, this method comprises: in the case where positive displacement compressor will load transfiguration compression cylinder, the transfiguration mouth high-voltage end of transfiguration compression cylinder and the pressure difference of air-breathing pipe end are detected；The pressure value for adjusting transfiguration mouth high-voltage end, so that pressure difference is fallen into preset threshold range；Enabled cylinder Qie Gang mechanism, to load transfiguration compression cylinder.Through the invention, it solves the problems, such as that the valve block service life caused by cutting the height pressure difference constant control of cylinder control is short, improves the service life of valve block.
Description
Technical field
The present invention relates to compressor field, cylinder control is cut in particular to a kind of positive displacement compressor, positive displacement compressor
Method and medium.
Background technique
There is the compressor using frequency conversion transfiguration in air-conditioning system industry at present, principle is on the basis of frequency-changeable compressor
Increase variable capacity technology, has widened compressor cooling capacity bottoming, solved multi-connected machine user and singly open an interior machine low-energy-efficiency
Situation.
Varying capacity cuts cylinder control, at present by the low pressure valve being connected with air intake duct and the high pressure valve tune being connected with exhaust pipe
Transfiguration mouth pressure is saved, by realizing that the movement of slide plate carries out cutting cylinder with transfiguration mouth constant pressure difference inside compressor.The study found that should
Cylinder control method is cut at least to have the following deficiencies:
1, system has double body structure, at high cost, and defective valve is doubled compared to single valve body.
2, the height pressure difference constant control of cylinder control is cut.But if pressure difference can just be such that valve block slides, compressor
It is difficult to keep the twin-tub stable operation after cutting cylinder, and pressure difference causes the driving force of valve block too big very much greatly, valve block is contacted with rotor
When impact force it is big, loss is serious.
Summary of the invention
The present invention provides a kind of positive displacement compressor, positive displacement compressors to cut cylinder control method and medium, at least to solve
Valve block service life short problem caused by the height pressure difference constant control of cylinder control is cut in the related technology.
In a first aspect, the embodiment of the invention provides a kind of positive displacement compressor, the positive displacement compressor structure of the positive displacement compressor
It include: pressure regulator, first pressure sensor, second pressure sensor, wherein
The transfiguration mouth high pressure of the transfiguration compression cylinder is arranged in the pressure regulator and the first pressure sensor
The air-breathing pipe end of the transfiguration compression cylinder is arranged in end, the second pressure sensor.
Second aspect cuts cylinder control method the embodiment of the invention provides a kind of positive displacement compressor, comprising:
In the case where positive displacement compressor will load transfiguration compression cylinder, the transfiguration mouth high pressure of transfiguration compression cylinder is detected
The pressure difference at end and air-breathing pipe end；
The pressure value of the transfiguration mouth high-voltage end is adjusted, so that the pressure difference is fallen into preset threshold range；
Enabled cylinder Qie Gang mechanism, to load the transfiguration compression cylinder.
The third aspect, the embodiment of the invention provides a kind of computer readable storage mediums, are stored thereon with computer journey
Sequence instruction, method described in second aspect is realized when the computer program instructions are executed by processor.
The positive displacement compressor that there is provided through the embodiment of the present invention, positive displacement compressor cut cylinder control method and medium, use
In the case where positive displacement compressor will load transfiguration compression cylinder, the transfiguration mouth high-voltage end and air-breathing of transfiguration compression cylinder are detected
The pressure difference of pipe end；The pressure value for adjusting transfiguration mouth high-voltage end, so that pressure difference is fallen into preset threshold range；Enabled cylinder is cut
Cylinder mechanism, in a manner of loading transfiguration compression cylinder, for the mode of double body structure height pressure difference constant control, this
Inventive embodiments are cut cylinder pressure and can dynamically be adjusted, and solve the valve block longevity caused by the height pressure difference constant control for cutting cylinder control
Short problem is ordered, the service life of valve block is improved.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the electrical structure schematic diagram of the work system of positive displacement compressor according to an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of transfiguration compression cylinder according to an embodiment of the present invention；
Fig. 3 is the flow chart for cutting cylinder control method of positive displacement compressor according to an embodiment of the present invention；
Fig. 4 is the flow chart that single cylinder according to an embodiment of the present invention switches to twin-tub；
Fig. 5 is the flow chart that twin-tub according to an embodiment of the present invention switches to single cylinder.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below, in order to make mesh of the invention
, technical solution and advantage be more clearly understood, with reference to the accompanying drawings and embodiments, the present invention is further retouched in detail
It states.It should be understood that described herein, the specific embodiments are only for explaining the present invention, is not intended to limit the present invention.For ability
For field technique personnel, the present invention can be implemented in the case where not needing some details in these details.It is right below
The description of embodiment is used for the purpose of better understanding the present invention to provide by showing example of the invention.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including ... ", it is not excluded that including
There is also other identical elements in the process, method, article or equipment of the element.
In the description of the present invention, it is to be understood that, the instructions side such as term " top ", " lower part ", " side ", " bottom "
Position or positional relationship are to be based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description of the present invention and simplification of the description,
Rather than the device or element of instruction or hint meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.
In addition, in the description of the present invention unless specifically defined or limited otherwise, term " on setting exists ... ", " phase
Even ", " connection ", " fixation " etc. shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or at one
Body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the interaction relationship of connection or two elements inside two elements.For the ordinary skill in the art,
The concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
A kind of positive displacement compressor system is provided in the present embodiment, and Fig. 1 is transfiguration compression according to an embodiment of the present invention
The electrical structure schematic diagram of the work system of machine becomes as shown in Figure 1, positive displacement compressor includes: at least one positive displacement compressor structure
Positive displacement compressor structure includes: crankshaft, transfiguration compression cylinder, valve block, cylinder Qie Gang mechanism, the present embodiment and in the related technology transfiguration pressure
The positive displacement compressor structure of contracting machine the difference is that: positive displacement compressor structure further include: pressure regulator 11, first pressure sensor
12, second pressure sensor 13.
Fig. 2 is the structural schematic diagram of transfiguration compression cylinder according to an embodiment of the present invention, as shown in Fig. 2, pressure regulator
11 and first pressure sensor 12 the transfiguration mouth high-voltage end 21 of transfiguration compression cylinder is set, the setting of second pressure sensor 13 exists
The air-breathing pipe end 22 of transfiguration compression cylinder.
Optionally, above-mentioned pressure regulator 11 includes but is not limited to electric expansion valve.
Optionally, in the present embodiment, positive displacement compressor includes at least one conventional compact mechanism and at least one transfiguration
Compression mechanism.That is, the conventional compact mechanism of the positive displacement compressor can be to be multiple, positive displacement compressor structure may be multiple.
Preferably, conventional compact mechanism is one, and positive displacement compressor structure is also one.In addition, the positive displacement compressor in the present embodiment is also
It can be frequency conversion positive displacement compressor.
Optionally, the cylinder compresses volume of conventional compact mechanism and positive displacement compressor structure is equal.Alternatively, conventional compact mechanism
It is differed with the cylinder compresses volume of positive displacement compressor structure.
What the positive displacement compressor of the present embodiment may be implemented the positive displacement compressor that the embodiment of the present invention will describe cuts cylinder control
Method processed.It is constant relative to double body structure height pressure difference since the positive displacement compressor of the present embodiment is when carrying out cutting cylinder control
For the mode of control, the embodiment of the present invention is cut cylinder pressure and can dynamically be adjusted, solve cut cylinder control height pressure difference it is permanent
It is fixed control caused by valve block service life short problem, improve the service life of valve block.
Provide a kind of positive displacement compressor in the present embodiment cuts cylinder control method, the transfiguration pressure in the embodiment of the present invention
Contracting machine preferably uses positive displacement compressor described in above-described embodiment.Fig. 3 is positive displacement compressor according to an embodiment of the present invention
The flow chart of cylinder control method is cut, as shown in figure 3, the process includes the following steps:
Step S301, in the case where positive displacement compressor will load transfiguration compression cylinder, detection transfiguration compression cylinder
The pressure difference of transfiguration mouth high-voltage end and air-breathing pipe end；Wherein, the pressure value of air-breathing pipe end and transfiguration compression cylinder and cylinder machine is cut
The pressure value of the pressure chamber of structure is identical.
Step S302 adjusts the pressure value of transfiguration mouth high-voltage end, so that pressure difference is fallen into preset threshold range；
Step S303 enables cylinder Qie Gang mechanism, to load transfiguration compression cylinder.
Using above-mentioned steps, defective valve is not only reduced, and since the height pressure difference for cutting cylinder control can pass through adjusting
The pressure value of transfiguration mouth high-voltage end controls high pressure end pressure to reach the mobile required most suitable pressure difference of valve block, so that cutting in valve block
When cylinder, impact force when valve block is contacted with rotor is reduced, realizes and cuts cylinder system low cost, low failure, low-loss.
Optionally, preset threshold range is to cut cylinder pressure difference needed for being both able to satisfy the valve block for pushing positive displacement compressor structure,
Valve block extent of deterioration can be made to meet design service life required pressure difference range again.Above-mentioned preset threshold range generally passes through reality
Test obtains, or takes empirical value.
Optionally, after loading transfiguration compression cylinder, method further include: successfully loading the default of transfiguration compression cylinder
After time, increase the pressure value of transfiguration mouth high-voltage end.After the pressure value for increasing transfiguration mouth high-voltage end, after being conducive to transfiguration
Compressor stable operation.Preset time therein is measured by experiment, or takes empirical value.
Optionally, method further include: in the case where positive displacement compressor will unload transfiguration compression cylinder, reduce transfiguration mouth
The pressure value of high-voltage end, or the pressure regulator of transfiguration mouth high-voltage end is closed, transfiguration pressure is unloaded to enable cylinder Qie Gang mechanism
Contracting cylinder.
The minimum cylinder volume of conventional compact cylinder and transfiguration compression cylinder is set as a, b.It is only compressed when single-cylinder mode operation
Volume is the work of a, and minimum cylinder volume is that the cylinder of b is unloaded；When twin cylinder mode operation, two cylinders of a, b run work simultaneously
Make.Transfiguration mouth high-voltage end has pressure regulator and pressure sensor, air-breathing pipe end (with Qie Gang mechanism inside compressor with pressure)
With pressure sensor (system low-voltage sensor).Compressor has single, double cylinder switching mechanism, can be carried out by switching mechanism
Single-cylinder, twin cylinder mutually switch.
Assuming that transfiguration mouth pressure sensor detection refrigerant pressure is P1 (P1 can change according to pressure regulator), air-breathing pipe end
Detection pressure is P2, and [x, y] is to obtain fixed pressure difference parameter area (being equivalent to above-mentioned preset threshold range) according to experiment, writes from memory
It is single-cylinder when recognizing starting.
With reference to Fig. 4, when detection of air-conditioning system detection needs, which are asked, is changed to twin cylinder operation, control system transfers pressure P1,
And pressure P2 illustrates that cutting cylinder at this time is easy to cause valve block loss or pressure difference to be not enough to when △ P=P1-P2 does not locate [x, y] range
Cylinder is cut, pressure regulator adjusts P1.When system detection to △ P is in [x, y] range, cylinder time t is cut (quite by stablizing
In above-mentioned preset time) after, pressure regulator standard-sized sheet, it is poor to be pressurized, and guarantees the operation of twin-tub mode stable.
Optionally, when pressure regulator starts and pressurizes, pressure regulator gradually pressurizes.For example, each cycle n seconds increase
5%, until △ P is in [x, y] range, cylinder completion is cut, is cut after cylinder completes t second, pressure regulator standard-sized sheet, twin-tub mode stable is transported
Row.
With reference to Fig. 5, when detection of air-conditioning system detection needs, which are asked, is changed to single-cylinder operation, pressure regulator closes entirely, △ P <
[x, y] causes pin rising to block valve block, single cylinder stable operation.
Two above movement is repeated, and realizes frequency conversion positive displacement compressor transfiguration operation.
Through the above description of the embodiments, those skilled in the art can be understood that according to above-mentioned implementation
The method of example can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but it is very much
In the case of the former be more preferably embodiment.Based on this understanding, technical solution of the present invention is substantially in other words to existing
The part that technology contributes can be embodied in the form of software products, which is stored in a storage
In medium (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal device (can be mobile phone, calculate
Machine, server or network equipment etc.) method that executes each embodiment of the present invention.
In addition, in conjunction with the subject matter title method in above-described embodiment, the embodiment of the present invention can provide a kind of computer
Readable storage medium storing program for executing is realized.Computer program instructions are stored on the computer readable storage medium；The computer program refers to
Enable any one the subject matter title method realized in above-described embodiment when being executed by processor.
It should be clear that the invention is not limited to specific configuration described above and shown in figure and processing.
For brevity, it is omitted here the detailed description to known method.In the above-described embodiments, several tools have been described and illustrated
The step of body, is as example.But method process of the invention is not limited to described and illustrated specific steps, this field
Technical staff can be variously modified, modification and addition after understanding spirit of the invention, or suitable between changing the step
Sequence.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of positive displacement compressor cuts cylinder control method, which is characterized in that the positive displacement compressor structure of the positive displacement compressor includes:
Pressure regulator, first pressure sensor, second pressure sensor, wherein
The transfiguration mouth high-voltage end of the transfiguration compression cylinder, institute is arranged in the pressure regulator and the first pressure sensor
State the air-breathing pipe end that the transfiguration compression cylinder is arranged in second pressure sensor；
In the case where positive displacement compressor will load transfiguration compression cylinder, detect transfiguration compression cylinder transfiguration mouth high-voltage end and
The pressure difference of air-breathing pipe end；
The pressure value of the transfiguration mouth high-voltage end is adjusted, so that the pressure difference is fallen into preset threshold range；
Enabled cylinder Qie Gang mechanism, to load the transfiguration compression cylinder；
The preset threshold range is to cut cylinder pressure difference needed for being not only able to satisfy the valve block for pushing positive displacement compressor structure, but also can make institute
It states valve block extent of deterioration and meets design service life required pressure difference range.
2. the method according to claim 1, wherein the positive displacement compressor includes: at least one described transfiguration
Compression mechanism, the positive displacement compressor structure further include: crankshaft, transfiguration compression cylinder, valve block, cylinder Qie Gang mechanism.
3. the method according to claim 1, wherein the positive displacement compressor includes at least one Conventional press
Structure and at least one positive displacement compressor structure.
4. according to the method described in claim 3, it is characterized in that, the conventional compact mechanism and the positive displacement compressor structure
Cylinder compresses volume is equal.
5. according to the method described in claim 3, it is characterized in that, the conventional compact mechanism and the positive displacement compressor structure
Cylinder compresses volume differs.
6. the method according to claim 1, wherein after loading the transfiguration compression cylinder, the method
Further include:
After the preset time for successfully loading the transfiguration compression cylinder, increase the pressure value of the transfiguration mouth high-voltage end.
7. method according to claim 1 or 6, which is characterized in that the method also includes:
In the case where the positive displacement compressor will unload the transfiguration compression cylinder, the pressure of the transfiguration mouth high-voltage end is reduced
Force value, or the pressure regulator of the transfiguration mouth high-voltage end is closed, the transfiguration compression is unloaded to enable cylinder Qie Gang mechanism
Cylinder.
8. a kind of computer readable storage medium, is stored thereon with computer program instructions, which is characterized in that when the computer
The method as described in any one of claim 1,6,7 is realized when program instruction is executed by processor.
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| CN201810963131.8A CN109098958B (en) | 2018-08-22 | 2018-08-22 | Positive displacement compressor, positive displacement compressor cut cylinder control method and medium |
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| CN109098958B true CN109098958B (en) | 2019-11-29 |
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| CN113514203A (en) * | 2021-04-01 | 2021-10-19 | 江苏理工学院 | Air tightness detection device and detection method for automobile air conditioner compressor disassembled part |
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| CN109185094A (en) * | 2018-08-17 | 2019-01-11 | 珠海格力电器股份有限公司 | A kind of method, apparatus and unit, air-conditioning system of control compression machine-cut cylinder |
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| CN1296129A (en) * | 1999-08-04 | 2001-05-23 | 株式会社丰田自动织机制作所 | Valve for controlling air condition system and control method thereof |
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