CN108626116A - Scroll compressor and control method of scroll compressor - Google Patents
Scroll compressor and control method of scroll compressor Download PDFInfo
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- CN108626116A CN108626116A CN201710179648.3A CN201710179648A CN108626116A CN 108626116 A CN108626116 A CN 108626116A CN 201710179648 A CN201710179648 A CN 201710179648A CN 108626116 A CN108626116 A CN 108626116A
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- chamber group
- screw compressor
- vortex
- motor
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000006835 compression Effects 0.000 claims abstract description 115
- 238000007906 compression Methods 0.000 claims abstract description 115
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 230000001050 lubricating effect Effects 0.000 description 10
- 238000005461 lubrication Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000005192 partition Methods 0.000 description 6
- 206010008469 Chest discomfort Diseases 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 1
- 206010020843 Hyperthermia Diseases 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036031 hyperthermia Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/16—Wear
- F04C2270/165—Controlled or regulated
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention relates to a scroll compressor and a control method thereof. The present disclosure provides a scroll compressor, which includes: the vortex assembly comprises a fixed vortex and an orbiting vortex which are matched with each other to compress a working fluid, wherein the fixed vortex comprises a first fixed vortex blade, the orbiting vortex comprises a first orbiting vortex blade, and the first fixed vortex blade and the first orbiting vortex blade are matched to define a first compression cavity group; the motor drives the vortex assembly to operate through the rotating shaft; a bypass device configured to selectively communicate one or more compression chambers of the first compression chamber group with a suction pressure region of the scroll compressor; a control device configured to control the motor and the bypass device such that the bypass device is opened before or at the same time as the motor is started. The disclosure also provides a corresponding scroll compressor control method.
Description
Technical field
The present invention relates to compressors, more particularly to screw compressor and relevant control method.
Background technology
The content of this part provide only with the relevant background information of the disclosure, the prior art may not constituted.
Screw compressor is a kind of common compressor, and after compressor is powered and starts, the motor of compressor starts to rotate,
Pressure is begun setting up in the compression chamber of scroll component.Usually, in the very short time after compressor start, in compression chamber
Just quickly generate high pressure.During compressor operating, between all parts in compressor exist friction, for example, bearing and
Friction between the component parts of scroll component.Usually alleviate this friction by conveying lubricating oil from bottom oil sump.However,
In the of short duration period after compressor start, the indoor pressure of compression chamber quickly increases, and cannot still be built in compressor assembly
Good lubrication is erected, thus causes the friction pair between each component of initial start stage compressor that cannot obtain good lubrication,
To increase the abrasion of compressor part, the service life of compressor is reduced.
Quick-pressurizing problem after screw compressor startup is it is also possible to interfere the normal startup of compressor.Screw compressor
It needs to overcome the load from system pressure and the load from mechanical friction when startup, any mistake is mostly in two kinds of load
Compressor may be caused not start normally.Have during compressor assembly works, at each equipment in system different
Pressure, for example, the pressure at condenser (exhaust outlet of compressor) is higher, the pressure at evaporator (compressor air suction mouth) is relatively low.
After compressor closing, need certain downtime that each equipment is made to discharge the pressure of itself to keep the high-low pressure in system complete
Full balance.It is again started up if after just closed in compressor, at this time the not yet complete equipilibrium of the high-low pressure in system, compressor
Need to overcome high voltage startup in system, the pressure loading of compressor start is quite big, and the torque needed for starting is insufficient.This feelings
The acceleration shock of motor also can be very big under condition, causes starting current larger, and thus caused localized hyperthermia can interfere foundation rubbing
Vice division chief is wiped effectively to lubricate.Startup pressure loading is excessive as a result, and lubrication failure can cause motor that can not rotate thus cannot
It is normal to start, i.e., it is so-called " stall ".
Accordingly, it is desirable to provide a solution is to solve at least one above-mentioned technical problem.
Invention content
It is an object of the present invention to provide a kind of screw compressors, and can be stood in compressor built-in in initial start stage has
The lubrication of effect.
A further object of the present invention is to provide a kind of screw compressor, can avoid the improper startup of compressor.
It is also another object of the present invention to provide a kind of control methods of screw compressor, can eliminate lubrication lag
Problem so as to starting compressor in a low friction manner.
One or more of above-mentioned purpose can be realized by following proposal.
A kind of screw compressor is provided according to one aspect of the disclosure comprising：Scroll component, scroll component include
It is fitted to each other with the determine vortex and dynamic vortex compressed to working fluid, wherein determine vortex includes the first determine vortex blade, is moved
Vortex includes the first dynamic vortex blade, and the first determine vortex blade and the cooperation of the first dynamic vortex blade limit the first compression chamber group；
Motor, motor drive scroll component to run by shaft；By-pass collar, by-pass collar are configured to the first compression chamber selectively
One or more compression chambers of group are connected to the suction-pressure region of screw compressor；Control device, control device are configured to control
Motor and by-pass collar processed so that open by-pass collar before starting motor or while starting motor.
Using the above scheme, by changing the Starting mode of compressor, by-pass collar will be first passed through before electric motor starting to press
Contracting chamber group is bypassed with intake region, and can rub excessive problem to avoid initial start stage, avoid excessive mill when compressor start
Damage.
Preferably, control device is further configured to：After electric motor starting reaches predetermined amount of time or motor reaches predetermined and turns
By-pass collar is closed after speed.
Preferably, predetermined amount of time is 1s to 3s, and desired speed is the rated speed of motor.
Preferably, determine vortex further includes the second determine vortex blade, and dynamic vortex further includes the second dynamic vortex blade, the first dynamic whirlpool
Vane piece and the cooperation of the first determine vortex blade and the second determine vortex blade limit the first compression chamber group, the second dynamic vortex blade with
First determine vortex blade and the cooperation of the second determine vortex blade limit the second compression chamber group, the first compression chamber group and the second compression chamber
Group is independent of one another.
Preferably, the first compression chamber group and the second compression chamber group capacity having the same.
Preferably, the first compression chamber group and the second compression chamber group have different capacity.
Preferably, the molded line length of the first dynamic vortex blade is more than the molded line length or first of the second dynamic vortex blade
The molded line height of dynamic vortex blade is more than the molded line height of the second dynamic vortex blade.
Preferably, by-pass collar includes：Being used for for being arranged in determine vortex and/or dynamic vortex will be in the first compression chamber group
One or more compression chambers are connected to the bypass passageways of suction-pressure region；And the by-passing valve being arranged in bypass passageways.
Preferably, after electric motor starting, control device is selectively opened and closes by-pass collar to adjust screw compressor
Capacity or avoid the overload or overheat of screw compressor.
A kind of control method of screw compressor, wherein screw compressor packet are provided according to another aspect of the present disclosure
It includes：Scroll component, scroll component include the determine vortex and dynamic vortex being fitted to each other to be compressed to working fluid, determine vortex packet
The first determine vortex blade is included, dynamic vortex includes the first dynamic vortex blade, the first determine vortex blade and the cooperation of the first dynamic vortex blade
Limit the first compression chamber group；Motor, motor drive scroll component to run by shaft；By-pass collar, by-pass collar are configured to
Selectively one or more compression chambers of the first compression chamber group are connected to the suction-pressure region of screw compressor；
The control method includes the following steps：
A) by-pass collar is opened according to the compressor start instruction from operator, by the first compression of scroll component
One or more compression chambers of chamber group are connected to suction-pressure region；
B) start while opening by-pass collar or later motor.
Preferably, which further includes reaching predetermined up to the rotating speed of predetermined amount of time or motor after electric motor starting
The step of by-pass collar is closed after rotating speed.
Preferably, predetermined amount of time is 1s to 3s, and desired speed is the rated speed of motor.
Preferably, which further includes that by-pass collar is selectively opened and closed after electric motor starting to adjust whirlpool
The step of revolving the capacity of compressor or screw compressor avoided to overload or overheat.
Description of the drawings
By description referring to the drawings, the feature and advantage of one or several embodiments of the invention will become more
Add and is readily appreciated that, wherein：
Fig. 1 is the longitudinal cross-section schematic diagram according to the screw compressor of embodiment of the present invention；
Fig. 2 is the cross-sectional view according to the double-round scroll component of embodiment of the present invention；
Fig. 3 is the longitudinal cross-section schematic diagram according to the double-round scroll component of embodiment of the present invention；
Fig. 4 is according to another longitudinal cross-section schematic diagram of the double-round scroll component of embodiment of the present invention, wherein by-passing valve
It is removed to show bypass passageways；
Fig. 5 is an exemplary plot according to the dynamic vortex of the double-round scroll component of embodiment of the present invention；
Fig. 6 is another exemplary plot according to the dynamic vortex of the double-round scroll component of embodiment of the present invention；
Fig. 7 is another exemplary plot according to the dynamic vortex of the double-round scroll component of embodiment of the present invention；
Fig. 8 A and Fig. 8 B are two exemplary plots according to the determine vortex of the double-round scroll component of embodiment of the present invention；
Fig. 9 is the vertical view according to the individual pen scroll component of embodiment of the present invention；And
Figure 10 is the partial process view according to the control method of the screw compressor of embodiment of the present invention.
Specific implementation mode
Description related to the preferred embodiment is only exemplary below, and is definitely not to the present invention and its application or usage
Limitation.The same reference numerals are used to designate identical components in various figures, therefore the construction of same parts will not
Repeat description.
The basic fundamental design of the present invention is briefly described first.The present inventors have noted that initial start stage is caused to be compressed
The main reason for each friction vice division chief's excessive friction, is that the load in compressor is established and lubricating system offer effectively profit in machine
Existence time is poor between cunning, that is, the foundation of effectively lubricating is established relative to load in compressor has lag.For this purpose, of the invention
People proposes to establish in system pressure after effectively lubricating to begin setting up the scheme of system pressure again to avoid the mistake of initial start stage
Big friction.
According to above-mentioned technical concept, initial start stage excessive friction can be solved according to the embodiment of the present invention by, which providing, asks
The screw compressor of topic and relevant control method.Scroll compression according to the present invention is described below with reference to Fig. 1-Figure 10
The realization method and control method of machine.
Fig. 1 shows a kind of screw compressor 100 according to embodiment of the present invention, and Fig. 2, Fig. 3 and Fig. 4 all illustrate figure
The scroll component used in 1 screw compressor 100.Compressor hereafter is related generally to the description of 100 structure of screw compressor
100 basic component parts and relevant component is controlled with starting, the description to other component will be omitted herein.
It will be noted from fig. 1 that may include shell 110 according to the screw compressor 100 of the disclosure, being arranged in shell
The partition board 116 above scroll component, scroll component in 110, the rotary shaft 130 for driving scroll component and motor 120.
Shell 110 may include the ontology 111 of general cylindrical shape, head cover 112 and the setting in 111 one end of ontology be arranged
In the bottom cover 114 of 111 other end of ontology.Scroll component is configured to working fluid (e.g., the gaseous refrigerant to entering scroll component
Agent) it is compressed, may include determine vortex 150 and dynamic vortex 160.Partition board 116 can be arranged in head cover 112 and ontology 111
Between (in Fig. 1 for extend along substantially horizontal direction), to by the inner space of screw compressor 100 be separated into positioned at every
The low pressure side region L of 116 side of plate (plane where corresponding to Fig. 1 is the downside of partition board 116) and (corresponding positioned at the partition board other side
The plane where Fig. 1 is the upside of partition board 116) high pressure side region H.It is provided in low pressure side region L for sucking workflow
The inlet suction port 180 of body is provided with the exhaust joint 190 for compressed high-pressure fluid to be discharged in high pressure side region H.By
This, low pressure side region L is referred to as suction-pressure region, and high pressure side region H is referred to as pressure at expulsion region.
Motor 120 may include stator 122 and rotor 124.Drive shaft 130 extends through rotor 124 and in motor 120
Driving under rotate.Drive shaft 130 further drives the dynamic vortex 160 of scroll component to be translatable relative to determine vortex 150
Rotation, to be compressed to entering the working fluid between determine vortex 150 and dynamic vortex 160.
Fig. 2 shows the cross-sectional views according to embodiment of the scroll component of the screw compressor 100 of the disclosure.
In this embodiment, scroll component is configured to double-round scroll component.In double-round scroll component shown in figure, determine vortex
150 and dynamic vortex 160 respectively tool there are two volution blade.Determine vortex 150 includes the first determine vortex blade 151 and the second determine vortex
Blade 152, and dynamic vortex 160 includes the first dynamic vortex blade 161 and the second dynamic vortex blade 162.First dynamic vortex blade 161
It engagingly engages to form the first compression chamber group C1 with the first determine vortex blade 151 and the second determine vortex blade 152 respectively.The
One compression chamber group C1 may include the first sub- compression chamber C1A of the radially inner side positioned at the first dynamic vortex blade 161 and positioned at the
First sub- compression chamber C1B of the radial outside of one dynamic vortex blade 161.Similarly, the second dynamic vortex blade 162 is respectively with first
Determine vortex blade 151 and the second determine vortex blade 152 engagingly engage to form the second compression chamber group C2.Second compression chamber group
C2 may include positioned at the second dynamic vortex blade 162 radially inner side the second sub- compression chamber C2A and be located at the second dynamic vortex leaf
Second sub- compression chamber C1B of the radial outside of piece 162.First compression chamber group C1 and the second compression chamber group C2 are carried out independently of one another
Squeeze operation and include respective air inlet section and exhaust section.It specifically, can be in the determine vortex end plate of determine vortex 150
First row stomata O1 corresponding with the first compression chamber group C1 and the second compression chamber group C2 and second row stomata respectively are set on 153
O2, for the high pressure gas compressed through the first compression chamber group C1 and the second compression chamber group C2 to be discharged respectively.First compression chamber
Group C1 and the second compression chamber group C2 (or more specifically each sub- compression chamber) can respectively respectively include being located substantially at diameter outside
Side and in pressure of inspiration(Pi) low pressure chamber, be located substantially at radially inner side and in pressure at expulsion high pressure chest and pressure be situated between
In middle pressure chamber between the two.With the operation of compressor, it is located at the low-pressure area of outermost radial outside along the molded line of volution blade
Direction gradually moves to radially intermediate part from radial outside and becomes middle pressure chamber, then further along molded line direction to radial direction
Medial motion and become high pressure chest, finally from corresponding gas vent be discharged.
It can be seen that, the first row stomata O1 and second row stomata O2 can be connected to another positioned at partition board 116 with reference to figure 1
The high pressure side region H of side, scroll compression is discharged to by the high pressure gas compressed via compression assembly by exhaust joint 190
Outside contracting machine.Similarly, in order to prevent the fluid of high pressure side region H in some cases via first row stomata O1 and second row
Stomata O2 flows back into low pressure side region L, and check valve or air bleeding valve can be arranged at first row stomata O1 and second row stomata O2
(not shown).
Fig. 3 and Fig. 4 further illustrates the longitdinal cross-section diagram of the scroll component according to the disclosure.It can be seen that being vortexed
Component further includes can be by the suction pressure region of the first compression chamber group C1 and/or the second compression chamber group C2 and screw compressor 100
The by-pass collar of domain connection.Specifically, this by-pass collar is constructed to be permeable to the first compression chamber group C1 and/or second selectively
The sub- compression chambers of one or more of compression chamber group C2 are connected to the suction-pressure region of screw compressor 100.In the example of Fig. 4
In, by-pass collar can be made up of by-passing valve 170 and bypass passageways 157.The more specific constituted mode of by-pass collar and side
Logical mode will be explained below.
Screw compressor 100 according to the disclosure further includes the control device for controlling screw compressor 100, specifically
Ground, for controlling motor 120 and above-mentioned by-pass collar.It is not shown in figure the control device according to the disclosure, but can be managed
Solution, this control device can be independently of the control device (such as external control device) of screw compressor 100, either
It is integrated on compressor 100 (such as the control panel that can be arranged on shell 110).Principle according to the present invention, control dress
Set may include operation for controlling compressor 100 multiple function modules, these function modules can be with logic control electricity
The mode on road (PLC) is realized.Specifically, it is configured to control motor 120 and side as follows according to the control device of the disclosure
Exchange device：So that before starting motor 120 or while starting motor 120, by-pass collar is opened.That is, controlling
After device receives compressor start instruction (instruction start compressor 100), by-pass collar is first turned on so as to by scroll set
First compression chamber group C1 of part and/or the second compression chamber group C2 are connected to suction-pressure region, thus the first compression chamber group C1 and/
Or the second pressure in compression chamber group C2 remains pressure of inspiration(Pi), will not establish high pressure.In turn, control device is by opening
Start motor 120 while exchange device or later, since the first compression chamber group C1 and/or the second compression chamber group C2 is kept and is inhaled
Atmospheric pressure region bypasses, and 100 initial start stage of compressor is not subject to big pressure loading and excessive friction.According to this of the disclosure
Control mode, in 100 initial start stage of compressor, motor 120 ramps up rotation and each component in compressor 100 is driven to transport
Turn, but pressure will not be set up in compressor assembly, this aspect allows compressor assembly to set up within the time period effectively
Lubrication, on the other hand avoid because it is rapid establish pressure loading caused by excessive friction.
As a result, by the way that by-pass collar and relevant control device is arranged, dexterously solves 100 initial start stage of compressor
Rub excessive problem, thus, it is possible to effectively prevent the excessive wear of the component of compressor 100, and can prevent compressor
100 occur " stall ".
Further, according to the control device of the screw compressor of the disclosure 100 can by set predetermined amount of time or
Person determines effective lubrication whether is had been built up in compressor 100 by detecting the rotating speed of motor 120.Preferably, it controls
Device be configured to motor 120 start up to after predetermined amount of time or motor 120 reach desired speed after close by-pass collar.
Determining whether system has built up by judging the predetermined amount of time whether being had already passed through after motor 120 starts
In the case of enough effectively lubricatings, according to embodiment of the present invention, this predetermined amount of time could be provided as 1s to 3s,
For general compressor, time period is enough to allow to set up effectively lubricating in system.
Determining that it is effective enough whether system has built up by judging whether motor 120 has reached desired speed
In the case of lubrication, according to embodiment of the present invention, this desired speed can be set as the rated speed of motor 120.
Motor 120 reach rated speed show compressor 100 fully start and this process during can establish effectively lubricating, no
It can occur " stall " because frrction load is excessive or effectively lubricating is insufficient.
Explained above is the control modes in startup stage according to the control device of the screw compressor 100 of the disclosure.
It will hereafter illustrate the by-pass governing of the scroll component of different configuration mode with continued reference to the example in attached drawing.
In the embodiment of the double-round scroll component shown in Fig. 3 and Fig. 4, double-round scroll component includes that can lead to first
A by-pass collar of compression chamber group C1, so as to by the first sub- compression chamber C1A and/or second in the first compression chamber group C1
Sub- compression chamber C1B is connected to suction-pressure region.By-passing valve 170 that by-pass collar shown in Fig. 3 and Fig. 4 includes and relevant
Bypass passageways 157.Further, this by-pass collar further includes being arranged lateral bypass passageways 157 and in determine vortex 150
Longitudinal by-pass prot 154 of one compression chamber group C1 connections, as shown in Figure 2.Longitudinal by-pass prot 154 is arranged in the second sub- compression chamber
In C1B, it is located substantially at the region of the middle pressure chamber of the first compression chamber C1.
Based on this embodiment, not establishing in initial start stage compressor 100 and any pressure non-fully, (gas carries
Lotus), but pressure is only established by the second compression chamber group C2, to which the pressure established in system is reduced to conventional startup situation
A part for the lower pressure that can be set up.
In turn, compressor 100 can be set by designing the capacity of the first compression chamber group C1 and the second compression chamber group C2
Initial start stage is by the pressure of foundation.Here, " capacity " of compression chamber group refer to each outermost low pressure chamber of compression chamber group just
The volume or quality of the fluid in this compression chamber group are sucked when closure.
In in accordance with one embodiment of the present disclosure, the capacity of the first compression chamber group C1 and the second compression chamber group C2 can be with
It is designed as identical.In the case where by-pass collar is opened, the pressure that system is established after compressor 100 starts will be conventional open
The 50% of system pressure when dynamic.It should be noted that the capacity of the first compression chamber group C1 and the second compression chamber group C2 are by vortex leaf
The length and height of piece determine.If two volution blades 151,152 of determine vortex 150 and two vortex leaves of dynamic vortex 160
Piece 161,162 is designed to length and height is all identical, then the capacity of the first compression chamber group C1 and the second compression chamber group C2 are homogeneous
Together.Fig. 5 shows the dynamic vortex 160 using this design method, the length and height phases of two volution blade 161,162
Together.
It, can also be by the first compression chamber group C1 and the second compression chamber group C2 in accordance with another embodiment of the present disclosure
It is designed as the capacity for having different.For this purpose, by two whirlpools of two volution blades 151,152 of determine vortex 150 and dynamic vortex 160
Vane piece 161,162 is designed as the height and/or length that have different.For example, the molded line length of the first dynamic vortex blade 161 is big
In the molded line length of the second dynamic vortex blade 162, as shown in Figure 6；Alternatively, the molded line height of the first dynamic vortex blade 161 is big
In the molded line height of the second dynamic vortex blade 162, as shown in Figure 7.Fig. 8 A and Fig. 8 B respectively illustrate with different height and
The schematic diagram of the determine vortex 150 of the volution blade 151,152 of different length.Fig. 8 A show the height of the first determine vortex blade 151
Degree is more than the second determine vortex blade 152, this design is based on, if the capacity of the first compression chamber group C1 and the second compression chamber group C2
Respectively 75% and 25% (for example, the height of the first determine vortex blade 151 is three times of 152 height of the second determine vortex blade),
When bypassing the first compression chamber group C1, the 25% of pressure when the pressure established in system is actually conventional start.Fig. 8 B are shown
The length of first determine vortex blade 151 is more than the length of the second determine vortex blade 152, the first determine vortex blade 151 and second
Length difference between determine vortex blade 152 can be needed with actual capacity to design.
Although the startup control of compressor 100 is described by taking double-round scroll component as an example above, according to the disclosure
Principle, scroll component can also be configured to individual pen scroll component, wherein determine vortex and dynamic vortex are respectively only including a vortex leaf
Piece.Fig. 9 shows the schematic top plan view of individual pen scroll component according to the embodiment of the present invention.As shown in the figure, determine vortex
250 and dynamic vortex 260 respectively include single volution blade 251 and 261.The two volution blades 251,261 are collectively formed individually
Compression chamber group C, specifically, compression chamber group C include being located at the sub- compression chamber CA of 261 inside of dynamic vortex blade and being located at dynamic vortex leaf
The sub- compression chamber CB in 261 outside of piece.Can be only that single compression chamber group C provides by-pass collar based on this design.It is appreciated that
, the constituted mode and arrangement of the by-pass collar for this individual pen scroll component can with shown in Fig. 3 and Fig. 4 for double
The by-pass collar for enclosing scroll component is similar.That is, by-pass collar may include：It is arranged in dynamic vortex 260 and/or determine vortex 250
Lateral bypass passageways for compression chamber group C to be connected to suction-pressure region and longitudinal by-pass prot and be arranged in transverse direction
By-passing valve in bypass passageways.The vertical view of Fig. 9 illustrates only the longitudinal by-pass prot 252,253 being formed in determine vortex 250.It needs
Conventional channel set-up mode is only indicated it is noted that horizontal and vertical, and in practical application, bypass passageways and by-pass prot are complete
It can be designed to tilt relative to horizontal and vertical direction.
In addition it is also necessary to which explanation, is not only used according to the by-pass collar in the scroll component of embodiment of the present invention
Effectively lubricating is established in the help in startup stage.During compressor works normally, it can also be selected according to actual operating mode
By-pass collar is opened to selecting property to adjust the pressure in compression chamber group or carry out capacity modulation.For example, if compressor occurred
It carries, then can open by-pass collar so that compressor discharges rapidly gas load；Alternatively, in the case of double-round scroll component,
If the operating pressure of downstream condenser is smaller, by-pass collar can be opened and bypass one of compression chamber, to provide
Suitable compression volume.It as a result, can be in oepration at full load pattern and capacity modulation according to the double-round screw compressor of the disclosure
Switch between pattern.Double-round screw compressor oepration at full load pattern (that is, by-pass collar close, by two pairs of volution blades
Working fluid is compressed simultaneously) in the case of, two compression chamber groups C1 and C2 carry out the compression of working fluid.In capacity
Under modulating mode (that is, by-pass collar opening), a compression chamber group in two compression chamber groups C1 and C2 (such as the first compression chamber
Group C1) it can selectively be bypassed to suction-pressure region, so that this bypassed compression chamber group substantially will not
Fluid is compressed, so as to realize the capacity modulation of compressor and improve efficiency.
Above-mentioned is exactly the specific implementation according to the screw compressor of embodiment of the present invention.In addition, according to the disclosure
Principle, additionally provide relevant compressor control method.The method of offer relates generally to the startup control of compressor, but this is simultaneously
Nonexcludability, the control during can also including compressor operating according to disclosed method.It is carried out below with reference to Figure 10
Explanation.Figure 10 shows an exemplary process diagram of the control method according to embodiment of the present invention.As shown in the figure, this is controlled
Method processed mainly includes the following steps that：
A) it is that compressor is powered；
B) judge whether to receive the compressor start instruction from operator；
C) by-pass collar that screw compressor is opened according to the compressor start instruction from operator, by scroll set
The compression chamber group of part is connected to intake region；
D) start the motor of screw compressor while opening by-pass collar or later；
E) judge whether to have already passed through after electric motor starting predetermined amount of time or motor rotating speed whether have reached it is predetermined
Rotating speed；
F) determine that electric motor starting has already passed through predetermined amount of time or the rotating speed of motor has reached general after desired speed
By-pass collar is closed.
Above-mentioned step c), d) it is committed step according to the control method of embodiment of the present invention, that is, receiving compression
At the same time or subsequent start-up motor by-pass collar is first opened after machine enabled instruction, to avoid excessive gas load is established.
In turn, it in step e) and f), closes by-pass collar after effectively lubricating is established in determination and starts to bypass before this
Compression chamber group in establish pressure.Determine whether that the mode for establishing effectively lubricating describes above, details are not described herein.
In addition, as previously described, by-pass collar can also be opened during the operation of compressor 100.Therefore, above-mentioned
Closing by-pass collar step f) after can also include：It is selectively beaten after the motor 120 of screw compressor 100 starts
The step of the step of opening by-pass collar is to adjust the capacity of compressor 100 or prevent to overload or overheat.
The numerous embodiments according to the disclosure and deformation is hereinbefore described.Although being described in detail herein according to this
The various embodiments of invention, it should be appreciated that the invention is not limited in the specific embodiment parties be described in detail and shown here
Formula may be effected by one skilled in the art other modifications and change without departing from the spirit and scope of the present invention
Body.All these modifications and variant are within the scope of the present invention.Moreover, all components described here can be by other
Technical equivalent component replaces.
Claims (13)
1. a kind of screw compressor (100), including：
Scroll component, the scroll component include being fitted to each other with the determine vortex (150) compressed to working fluid and dynamic whirlpool
It revolves (160), wherein the determine vortex includes the first determine vortex blade (151), and the dynamic vortex includes the first dynamic vortex blade
(161), the first determine vortex blade and the first dynamic vortex blade cooperation limit the first compression chamber group (C1)；
Motor (120), the motor drive the scroll component to run by shaft (130)；
By-pass collar, the by-pass collar are configured to one or more compression chambers of the first compression chamber group selectively
(C1A, C1B) is connected to the suction-pressure region of the screw compressor；
Control device, the control device are configured to control the motor and the by-pass collar so that：Starting the motor
While before or starting the motor, the by-pass collar is opened.
2. screw compressor (100) according to claim 1, wherein the control device is further configured to：Described
Electric motor starting reaches after predetermined amount of time or after the motor reaches desired speed, closes the by-pass collar.
3. screw compressor (100) according to claim 2, wherein the predetermined amount of time is 1s to 3s, described predetermined
Rotating speed is the rated speed of the motor.
4. screw compressor (100) according to any one of claim 1-3, wherein the determine vortex further includes second
Determine vortex blade (152), the dynamic vortex further include the second dynamic vortex blade (162), the first dynamic vortex blade with it is described
First determine vortex blade and the second determine vortex blade cooperation limit the first compression chamber group (C1), the second dynamic whirlpool
Vane piece limits the second compression chamber group (C2) with the first determine vortex blade and the second determine vortex blade cooperation, described
First compression chamber group and the second compression chamber group are independent of one another.
5. screw compressor (100) according to claim 4, wherein the first compression chamber group and second compression
Chamber group capacity having the same.
6. screw compressor (100) according to claim 4, wherein the first compression chamber group and second compression
Chamber group has different capacity.
7. screw compressor (100) according to claim 6, wherein the molded line of the first dynamic vortex blade (161) is long
Degree is more than more than the molded line length of the second dynamic vortex blade (162) or the molded line height of the first dynamic vortex blade
The molded line height of the second dynamic vortex blade.
8. screw compressor (100) according to any one of claim 1-3, wherein the by-pass collar includes：Setting
It is used to one or more of the first compression chamber group compression chamber being connected in the determine vortex and/or the dynamic vortex
To the bypass passageways (157) of the suction-pressure region；And the by-passing valve (170) being arranged in the bypass passageways.
9. screw compressor (100) according to any one of claim 1-3, wherein described after the electric motor starting
Control device selectively opens and closes the by-pass collar to adjust the capacity of the screw compressor or avoid the whirlpool
Revolve the overload or overheat of compressor.
10. a kind of control method of screw compressor, the screw compressor (100) include：
Scroll component, the scroll component include being fitted to each other with the determine vortex (150) compressed to working fluid and dynamic whirlpool
It revolves (160), the determine vortex includes the first determine vortex blade (151), and the dynamic vortex includes the first dynamic vortex blade (161),
The first determine vortex blade and the first dynamic vortex blade cooperation limit the first compression chamber group (C1)；
Motor (120), the motor drive the scroll component to run by shaft (130)；
By-pass collar, the by-pass collar are configured to one or more compression chambers of the first compression chamber group selectively
(C1A, C1B) is connected to the suction-pressure region of the screw compressor；
The control method includes the following steps：
A) by-pass collar is opened according to the compressor start instruction from operator, described in the scroll component
One or more compression chambers of first compression chamber group are connected to suction-pressure region；
B) start while opening the by-pass collar or later the motor.
11. control method according to claim 10 further includes reaching predetermined amount of time or institute after the electric motor starting
The rotating speed for stating motor reaches the step of desired speed later closes the by-pass collar.
12. control method according to claim 11, wherein the predetermined amount of time is 1s to 3s, the desired speed
For the rated speed of the motor.
13. control method according to claim 10, wherein further include be selectively opened after the electric motor starting and
The by-pass collar is closed to adjust the capacity of the screw compressor or the step for avoiding the screw compressor from overloading or overheat
Suddenly.
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| CN201710179648.3A CN108626116B (en) | 2017-03-23 | 2017-03-23 | Scroll compressor and control method of scroll compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710179648.3A CN108626116B (en) | 2017-03-23 | 2017-03-23 | Scroll compressor and control method of scroll compressor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109372744A (en) * | 2018-10-19 | 2019-02-22 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of compressor |
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| CN108626116B (en) | 2021-01-26 |
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