CN107664143A - Compressor and air conditioner with same - Google Patents
Compressor and air conditioner with same Download PDFInfo
- Publication number
- CN107664143A CN107664143A CN201710962857.5A CN201710962857A CN107664143A CN 107664143 A CN107664143 A CN 107664143A CN 201710962857 A CN201710962857 A CN 201710962857A CN 107664143 A CN107664143 A CN 107664143A
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- motor
- bearing
- cooling
- stator
- cooling section
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- 238000001816 cooling Methods 0.000 claims abstract description 117
- 230000006835 compression Effects 0.000 claims abstract description 64
- 238000007906 compression Methods 0.000 claims abstract description 64
- 239000003507 refrigerant Substances 0.000 claims description 40
- 239000000110 cooling liquid Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 96
- 238000005461 lubrication Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 6
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 239000000112 cooling gas Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010943 off-gassing Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a compressor and an air conditioner with the same. The compressor according to the present invention includes: the motor comprises a motor shell and a cooling channel arranged in the motor shell; the first compression part is arranged at the first end of the motor and comprises a first shell and a first diffuser connected with the first shell, a motor air return opening is formed in the first diffuser, and the cooling channel is communicated with the first compression part through the motor air return opening. The compressor can reduce an external return gas pipeline and reduce a leakage point.
Description
Technical field
The present invention relates to apparatus of air conditioning field, in particular to a kind of compressor and has its air conditioner.
Background technology
In the centrifugal compressor that freezes, the cooling generally use refrigerant cooling of motor.Common practice is led into motor
Enter cooling refrigerant, and the return-air of motor is directly taken back to the evaporator of refrigeration system or Economy of Intermediate Form device.Fig. 1 is a kind of electricity
Machine return-air pipe connecting structure, motor muffler 2 ' is external, and it is logical by the first tie point 1 ' and motor connection, motor muffler 2 '
The second tie point 5 ' is crossed to be connected with evaporator or Economy of Intermediate Form device.Wherein, motor muffler 2 ' does not have 3 ' by the first fixed support
It is fixed with the second fixed support 4 '.This motor type of cooling, for supplying refrigerant, causes there is increase external connection pipeline
Complicated integral structure, cost is high, and increasing due to connecting line so that potential risk point increases, and influences global reliability.
In addition, non-oil ultra high vacuum system and high performance-price ratio are the developing direction of refrigeration centrifugal compressor, such as：Magnetic suspension centrifugal compressor,
Gas suspension centrifugal compressor and refrigerant lubrication bearing centrifugal compressor, due to eliminating huge oil piping system, whole compressor
There was only refrigerant medium in inside, it is thus possible to realize non-oil ultra high vacuum system well.But in the prior art, the compressor of these types returns
Gas is also to take back evaporator and flash evaporation, and this structure can naturally also have system architecture complexity described above, and cost is high
The problem of.
The content of the invention
The present invention is intended to provide a kind of compressor that can reduce connecting line and there is its air conditioner.
The invention provides a kind of compressor, and it includes：Motor, motor include electric machine casing and are arranged in electric machine casing
Cooling duct；First compression unit, the first compression unit are arranged on the first end of motor, the first compression unit include the first housing and with
First diffuser of the first housing connection, is provided with motor gas returning port on the first diffuser, cooling duct passes through motor gas returning port
Connected with the first compression unit.
Alternatively, motor gas returning port is first end close to one end of motor, motor gas returning port close to the first compression unit one
Hold as the second end, the line at the first end of motor gas returning port and the second end is the rotary shaft of the first line, the first line and motor
There is the first angle between normal direction vertical plane where line, and on normal direction vertical plane, the first end of motor gas returning port and rotation
The distance of axis is less than the second end of motor gas returning port and the distance of pivot center.
Alternatively, the span of the first angle is 15 ° to 35 °.
Alternatively, the first line has the second angle with the axial vertical plane where motor rotation axis line, and axially perpendicular
Face directly, the first end of motor gas returning port and the distance of pivot center be less than motor gas returning port the second end and pivot center away from
From.
Alternatively, the span of the second angle is 55 ° to 75 °.
Alternatively, motor gas returning port is multiple, and is arranged at intervals successively on the first circumference, and the first circumference is centrally located at
On the pivot center of motor.
Alternatively, motor gas returning port uniform intervals on the first circumference are set, and the center of two neighboring motor gas returning port
The 3rd angle is formed with the line in the center of circle of the first circumference, the span of the 3rd angle is 12 ° to 30 °.
Alternatively, motor also includes stator, and stator is arranged in electric machine casing, and is fixedly connected with electric machine casing, cooling
Passage includes the first cooling section, and the first cooling section is located on the inwall of electric machine casing and position is correspondingly arranged with stator, and first is cold
But the opening of section is towards stator.
Alternatively, the first cooling section is the spiral section extended along the axial screw of stator.
Alternatively, the opening position of stator is corresponded on electric machine casing, is provided with the motor cooling connected with the first cooling section
Liquid import.
Alternatively, motor also includes：Rotor, rotor are located in stator, and cooling duct also includes the second cooling section, and second is cold
But section includes the gap between rotor and stator.
Alternatively, motor also includes bearing assembly, and bearing assembly includes：Bearing, cooling duct also include being arranged on bearing
The upper cooling bearing cooling section that but refrigerant passes through.
Alternatively, the opening position of bearing is corresponded on electric machine casing, is provided with the bearing cooling connected with bearing cooling section
Liquid import.
Alternatively, bearing assembly is two, and is arranged on the both sides of stator correspondingly, and bearing cooling liquid inlet is corresponding
Set in the bearing assembly away from the first compression unit.
Alternatively, motor also includes stator, rotor and bearing, and stator is arranged in electric machine casing, and is consolidated with electric machine casing
Fixed connection, cooling duct include the first cooling section, and the first cooling section is located on the inwall of electric machine casing and position is corresponding with stator
Set, the opening of the first cooling section is towards stator；Rotor is located in stator, and cooling duct also includes the second cooling section, and second is cold
But section includes the gap between rotor and stator；Cooling duct is also cold including being arranged on the cooling bearing that but refrigerant passes through on bearing
But section；It is passed through refrigerant in motor, at least a portion refrigerant is passed sequentially through after the first cooling section and the second cooling section from motor return-air
Mouthful outflow, at least another part refrigerant pass sequentially through the 3rd cooling section on the bearing away from motor gas returning port, the second cooling section,
And flowed out after the 3rd cooling section on the bearing of motor gas returning port from motor gas returning port.
Alternatively, compressor also includes the second compression unit, and the second compression unit is arranged on the second end of motor.
According to another aspect of the present invention, there is provided a kind of air conditioner, it includes compressor, and compressor is above-mentioned compression
Machine.
According to the compressor of the present invention and there is its air conditioner, by setting motor gas returning port on the first diffuser,
The return-air after motor cooling is entered by motor gas returning port in the first compression unit, can so realize that electric machine built-in is vented, and
Without installing muffler outside motor, exterior space is saved, increases overall structure caused by avoiding external motor muffler
The problem of complexity, high cost, and avoiding because connecting line increases, caused by potential risk point increase, influence overall reliable
The problem of property.
Brief description of the drawings
The accompanying drawing for forming the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation that motor of the prior art is connected by external motor muffler with return-air structure；
Fig. 2 is the cross section structure diagram according to the compressor of the present invention；
Fig. 3 is the cross section structure diagram according to the first diffuser of the compressor of the present invention；
Fig. 4 is the side structure schematic view according to the first diffuser of the compressor of the present invention；
Fig. 5 is the main structure diagram according to the first diffuser of the compressor of the present invention；
Fig. 6 is the dimensional structure diagram according to the first diffuser of the compressor of the present invention.
Description of reference numerals：
Prior art：
1 ', first tie point；2 ', motor muffler；3 ', first fixed support；4 ', second fixed support；5 ', second connects
Contact；
The present invention：
1st, electric machine casing；2nd, the first housing；3rd, the first impeller；4th, the first diffuser；5th, motor gas returning port；6th, stator；10、
Rotor；11st, installing plate；12nd, the second diffuser；13rd, the second impeller；14th, the second housing；15th, bearing；71st, the first cooling section；
72nd, the second cooling section；73rd, bearing cooling section；81st, motor cooling liquid inlet；82nd, bearing cooling liquid inlet.
Embodiment
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Figure 2 and Figure 6, according to an embodiment of the invention, compressor, which includes motor and the first compression unit, motor, includes
Electric machine casing 1 and the cooling duct being arranged in electric machine casing 1.First compression unit is arranged on the first end of motor, the first compression
Portion includes the first housing 2, the first diffuser 4 being connected with the first housing 2, and motor gas returning port 5 is provided with the first diffuser 4,
Cooling duct is connected by motor gas returning port 5 with the first compression unit.
By setting motor gas returning port 5 on the first diffuser 4, the return-air after motor cooling is set to pass through motor gas returning port 5
Into in the first compression unit, it can so realize that electric machine built-in is vented, without installing muffler outside motor, save outside
Space, avoid increase complicated integral structure degree caused by external motor muffler, the problem of cost is high, and avoid due to connection
Pipeline increases, caused by potential risk point increase, the problem of influenceing global reliability.
First compression unit also includes the first impeller 3, and the first impeller 3 is arranged in the first housing 2, passes through the first impeller 3
Rotate the compression realized to gas.For the motor cooled down using refrigerant, because refrigerant has unit mass refrigerating capacity big
The characteristics of, therefore in cooling procedure, motor winding temperature is generally 30 DEG C, considers 10 DEG C of heat transfer temperature difference, motor cavity gas one
As only 20 DEG C, for other positions higher than its temperature of compressor inside, the low temperature of motor cavity gas is one for this
Individual extraordinary low-temperature receiver.By built in motor gas returning port 5, the gas after cooling motor being discharged into the first compression unit, Ke Yishi
The recycling of existing low-temperature receiver, the outlet of the first impeller 3 in the first compression unit is on the one hand reduced into the gas in the first compression unit
The temperature of the gas of mouth discharge, effectively reduces pneumatic noise；On the other hand, due to the reduction of gas temperature, promoting the circulation of qi is subsequently entered
Wasted work when body compresses reduces, and is advantageous to save the energy.
Such a structure can be applied to any compressor using refrigerant cooling motor or using refrigerant lubrication bearing
Compressor, double end more than a kind of two-stage that is particularly suitable for use in set impeller non-oil ultra high vacuum system centrifugal compressor.
Alternatively, in the present embodiment, compressor also includes the second compression unit, and the second compression unit is arranged on the second of motor
End.Second compression unit is connected with the first compression unit, and the exhaust after the first compressing section compresses can enter in the second compression unit, the
Carry out discharging after compressing again in two compression units.
As shown in Fig. 2 motor also includes stator 6, rotating shaft and rotor 10.
Stator 6 is arranged in electric machine casing 1, and is fixed on the inwall of electric machine casing 1.Cooling duct includes the first cooling
Section 71, the first cooling section 71 is located on the inwall of electric machine casing 1 and position is correspondingly arranged with stator 6, and the first cooling section 71 is opened
Mouthful towards stator 6.First cooling section 71 is used for cooling matchmaker by so that refrigerant can cool down to stator 6.
Alternatively, the first cooling section 71 is the spiral section extended along the axial screw of stator 6.The spiral of first cooling section 71 prolongs
The length that can be effectively increased refrigerant and stator contact, area and time are stretched, it is sufficiently cool so as to be realized to stator 6.
In the present embodiment, the opening position of stator 6 is corresponded on electric machine casing 1, is provided with and is connected with the first cooling section 71
Motor cooling liquid inlet 81, to be passed through refrigerant into cooling duct.
Rotating shaft is rotatably arranged in electric machine casing 1, and is connected by bearing assembly with electric machine casing 1.Bearing assembly
For supporting rotating shaft, make rotating shaft rotatable.
The concrete structure of bearing assembly can determine as needed, for example, bearing assembly includes installing plate 11 and bearing 15.
Wherein, installing plate 11 is used to install and spring bearing 15, installing plate 11 are fixedly installed in electric machine casing 1.
Bearing 15 is arranged on installing plate 11, and bearing 15 can be deep groove ball bearing, taper roller axle according to stressing conditions
Hold.Bearing 15 can be that refrigerant lubricates bearing, can be sliding bearing or rolling bearing or magnetic suspension
Bearing, refrigerant lubricate the use of bearing, and the environment of oil-free is built to whole compressor, and the gas of each parts enters main flow
All without the influence for causing pollution and heat exchange during gas.
Alternatively, in the present embodiment, bearing 15 is that refrigerant lubricates bearing, is provided with axially penetrating through along bearing 15
Bearing cooling section 73, the bearing cooling section 73 passes through for refrigerant of the cooling but with lubrication.Cooling duct includes the bearing
Cooling section 73.
It should be noted that bearing cooling section 73 can be multiple as needed, and along the circumference of bearing 15, it is spaced successively
Set.
In the present embodiment, bearing assembly is two, and is arranged at intervals, and stator 6 is between two bearing assemblies.Rotating shaft
Through two bearing assemblies.
Bearing cooling section 73 is respectively provided among the refrigerant lubrication bearing of two bearing assemblies, cold media gas can pass through this portion
Subchannel takes away heat caused by bearing working process, wherein the lubrication bearing of the refrigerant away from the first compression unit is compressor
Base bearing, i.e.,：The bearing had both born the radial load of rotor axial system, bore the axial force of rotor axial system again, and close to the first compression
The refrigerant lubrication bearing in portion is the secondary bearing of compressor, is solely subjected to the radial load of rotor axial system.Therefore, it is main from operation principle
Bearing heating amount is greater than time bearing.
Alternatively, the opening position of bearing 15 is corresponded on electric machine casing 1, is provided with the bearing connected with bearing cooling section 73
Cooling liquid inlet 82, enter for the cooling refrigerant of bearing.
Because bearing assembly is two, and it is located at the both sides of stator 6 correspondingly, and the caloric value of one of bearing
More than another bearing, therefore, bearing cooling liquid inlet 82 corresponds to the bearing assembly away from the first compression unit and set, away from the
The bearing assembly of one compression unit is base bearing, and its corresponding setting of bearing cooling liquid inlet 82 may insure cooling effect.
Rotor 10 is arranged in rotating shaft, and with axis of rotation.Rotor 10 is between two bearing assemblies.Outside rotor 10
There is gap, this gap is the second cooling section 72 of cooling duct between the internal diameter of footpath and stator 6.
First diffuser 4 of the first compression unit is connected on electric machine casing 1, the first housing 2 and motor of the first compression unit
Housing 1 connects.First impeller 3 is located at the first end of motor, and is arranged in the first housing 2.Specifically, the first impeller 3 is with turning
Axis connection, and can be with axis of rotation.Gas after compression is discharged into the spiral case of the first housing 2 by the first impeller 3 by gas outlet.
With reference to shown in Fig. 3, by setting motor gas returning port 5 on the first diffuser 4, make the cooling return-air and first of motor
The gas outlet connection of impeller 3, cooling return-air are directly entered in the first compression unit, gas after compression are cooled, it is possible to achieve
Motor internal cryogenic gas cold recycles, and reduces exhaust noise, saves the connection of external motor return line, make system it is succinct,
Cost is low, so that whole centrifugal compressor obtains higher price-performance ratio.
Motor gas returning port 5 on first diffuser 4 can be multiple along being provided at circumferentially spaced for the first diffuser 4, for example,
Multiple motor gas returning ports 5 are disposed on the first circumference successively, wherein, the center of circle of the first circumference is located at the pivot center of motor
On.
Preferably, as shown in figure 5, the uniform intervals on the first circumference of motor gas returning port 5 are set, and two neighboring motor returns
The line in the center of circle of the center of gas port 5 and the first circumference forms the 3rd angle γ, the 3rd angle γ span for 12 ° extremely
30°.So the uniform intervals of motor gas returning port 5 are set, to meet motor row tolerance demand while make the uniform air inlet of the first compression unit,
And the quantity of motor gas returning port 5 can determine according to air inflow.
The value of 3rd angle mainly considers return-air air-flow velocity and the uniformity mixed and the manufacturability of processing, angle
It is smaller, it is meant that circumference gas returning port quantity is more, easier to be mixed with primary air, but processing capacity is bigger, and vice versa.
Alternatively, as shown in Fig. 3,4 and 6, the inclination extension of motor gas returning port 5, the i.e. center line of motor gas returning port 5 and rotating shaft
There is angle between axis (i.e. the pivot center of motor).In other words, motor gas returning port 5 is first close to one end of motor
End, motor gas returning port 5 are the second end, the first end of motor gas returning port 5 and the line at the second end close to one end of the first compression unit
For the first line, normal direction vertical plane (perpendicular to the vertical plane of pivot center) where the pivot center of the first line and motor it
Between there is the first angle α, and on normal direction vertical plane, the first end of motor gas returning port 5 and the distance of pivot center are less than motor
Second end of gas returning port 5 and the distance of pivot center.So cause motor return-air airflow direction and the when entering the first compression unit
The outgassing direction of one impeller 3 is more nearly, and is reduced influence of the motor return-air to the outlet of the first impeller 3, is reduced airflow fluctuation.
The span of first angle α is 15 ° to 35 °.The value of first angle α mainly consider air-flow mixed performance and
Return-air hole processing technology.Angle too small, return-air are smaller to primary air intervention, and performance is better, but processing technology is poor, otherwise also
So.
Alternatively, in the present embodiment, the first line of each motor gas returning port 5 erects with the axial direction where motor rotation axis line
Face directly between (parallel to the vertical plane of pivot center) and have the second angle β, and on axial vertical plane, the of motor gas returning port 5
The distance of one end and pivot center is less than the second end of motor gas returning port 5 and the distance of pivot center.This causes multiple motors to return
Gas port 5 forms spirally inlet air structure, can more adapt to the gas compression direction of spiral case.
Second angle β span is 55 ° to 75 °.Second angle β value mainly considers that primary air flow angle is entered
Row is chosen, and in this angular range return-air stream flow angle and primary air flow angle can be made basically identical.
It should be noted that it can directly connect that motor gas returning port 5 connects with the gas outlet of the first impeller 3, can also
It is indirect communication, for example, motor gas returning port 5 directly directly connects with the spiral case of the first compression unit.Moreover, motor gas returning port 5 with
Each angle that other reference lines or the plane of reference are formed must be the flow spiral formed with motor gas returning port 5 in setting
Direction (direction clockwise or counter-clockwise rotated with motor) is identical with the direction of motor rotation to be configured.
As shown in Fig. 2 the second compression unit include the second housing 14, the second impeller 13 for being arranged in the second housing 14 and with
Second diffuser 12 of the second housing 14 connection.Second diffuser 12 is connected to the second end of electric machine casing 1.Second housing 14 connects
It is connected on the second diffuser 12.Second impeller 13 is arranged in the second housing 14, and is connected on the second end of rotating shaft, and with turn
Axle rotates.The gas of first compression unit discharge, which enters, carries out second compression again in the second compression unit, to meet compression requirements.
The double end more than two-stage sets the motor return-air structure of impeller non-oil ultra high vacuum system centrifugal compressor to give full play to refrigerant profit
The advantage of plain besring, and motor chilling temperature state of a control is combined, motor gas returning port 5 is built in diffuser (this of previous stage
It is the first diffuser 4 in embodiment) on, base bearing (bearing away from the first diffuser 4) cooling gas and motor cooling gas
By secondary bearing (close to the bearing of the first diffuser 4) after mixing, it is sufficiently mixed with previous stage compression unit primary air, realizes prime
The increase of mainstream gas density, temperature reduce, and effectively reduce the effect of pneumatic noise, simultaneously as gas flow temperature declines, next stage
Compressing wasted work will reduce, so as to improve compressor efficiency.Meanwhile outside motor link circuit is saved, system leak source is reduced, is reached
Lift the purpose of compressor cost performance.
As shown in Figure 2.During compressor operating, the gas after the first compressing section compresses of previous stage will draw after spiral case is discharged
To the air entry of the second compression unit of next stage.Therefore, if the temperature of previous stage gas can be reduced, microcosmic molecule fortune in gas
Dynamic to weaken, into after next stage, next stage compression wasted work will reduce.
As above motor return-air structure, the control of motor cooling is combined, i.e.,：The temperature of gas is than preceding after motor cooling
The temperature of one stage of compression gas is low, so as to after motor return-air gas mixes with the mainstream gas that previous stage impeller is discharged, there is drop
Warm trend, realizes noise reduction.
The measure often cooled down according to prior art with motor and effect, typically only 20 DEG C of motor suction temperature, this temperature
Degree is highly beneficial for motor Effec-tive Function, therefore, horizontal according to prior art motor suction temperature, implements the electricity of the present embodiment
Machine return-air structure is feasible.
According to another aspect of the present invention, there is provided a kind of air conditioner, it includes compressor, and compressor is above-mentioned compression
Machine.
The compressor of the air conditioner is leaned in the diffuser (the first diffuser 4 i.e. in the present embodiment) of first order compression unit
Nearly one stage impeller wheel hub outlet side (i.e. the gas outlet of the first impeller 3), circumference is provided with multiple ramp ways (i.e. motor gas returning port
5) so that built in motor return-air, reduce outside return line, reduce hidden danger point.The size of these passages is returned according to motor
Tolerance and flow velocity determine.
As shown in Fig. 2 the cooling of the compressor and return-air process are as follows：
The cooling duct of motor includes some, such as the first cooling section 71, the second cooling section 72, bearing cooling section 73 and
Connecting portion between them grades.Wherein, there is spiral cooling duct, this spiral cooling duct is between stator and electric machine casing 1
For the first cooling section 71.Air gap channel between stator and rotor is the second cooling section 72.Set on refrigerant lubrication bearing cold
But lubrication is bearing cooling section 73 with passage.The motor cooling liquid inlet 81 and bearing coolant opened up on electric machine casing 1 enters
Mouth 82 is used to be passed through refrigerant into cooling duct.Wherein, motor cooling liquid inlet 81 is located at the side of stator, and bearing coolant is entered
Mouth 82 corresponds to the opening position of base bearing positioned at electric machine casing.
As shown in Fig. 2 during work, first flow through in a helical pattern of refrigerant liquid entered from motor cooling liquid inlet 81 is determined
The first cooling section 71 between son 6 and electric machine casing 1, takes away the heat of stator 6, is changing into gas, then into the right-hand member of stator 6
(right-hand member in Fig. 2) chamber.And the refrigerant liquid entered from bearing cooling liquid inlet 82 enters the installation of main refrigerant lubrication bearing
After the passage of the diffuser 12 of plate 11 and second composition, lubricated by main refrigerant on bearing (bearing away from motor gas returning port 5)
Bearing cooling section 73, after taking away bearing heating, become gas and enter the right-hand member chamber of stator 6 and the gas after cooling motor stator 6
Body mixes.
Gas is flowed through between stator 6 and rotor 10 with direction (direction in Fig. 2 from right to left) from right to left after mixing
Air gap (i.e. the second cooling section 72) enters stator left end (left end in Fig. 2) chamber, the heat of rotor 10 is taken away, then into secondary
The bearing cooling section 73 of refrigerant lubrication bearing (close to the bearing of motor gas returning port 5), takes away time bearing heating, and then enter first
Diffuser 4 is lubricated with time refrigerant in the passage of the composition of installing plate 11 of bearing, finally by the motor set in the first diffuser
Gas returning port 5 mixes with the bulk gas stream in the first compression unit, reduces bulk gas stream temperature, passes behind exterior line or other logical
Road is introduced into the second compression unit of right-hand member in Fig. 2.
It should be noted that：Wheel hub outlet side in the second diffuser 12 close to second impeller 13, not just like first
The gas returning port that diffuser 4 is set, but completely enclosed state.
In summary, impeller non-oil ultra high vacuum system centrifugal compressor, this built-in return-air structure are set for double end more than two-stage
The advantage of refrigerant lubrication bearing is given full play to, and combines motor chilling temperature state of a control, by the way that motor gas returning port 5 is built in
On the diffuser of previous stage, base bearing cooling gas mixed with motor cooling gas after by secondary bearing, with previous stage primary air
It is sufficiently mixed, realizes the increase of prime mainstream gas density, temperature reduces, and pneumatic noise is effectively reduced, simultaneously as gas flow temperature
Decline, next stage compression wasted work will reduce, so as to improve compressor efficiency.Meanwhile external motor external connection loop is saved, subtract
Few system leak source, reach the purpose of lifting compressor cost performance.
Had the following technical effect that according to the compressor of the present invention and with its air conditioner：
Solution prior art additionally increases outside motor return line and brings system complex and leakage problem.Save outside
Motor return line connects, and reduces cost, improves efficiency of assembling and compressor cost performance.
Realize that motor cavity cryogenic gas cold recycles, comprehensive utilization ratio is high, passes through cryogenic gas and pneumatic runner gas
Mixing, current density increase so that sound wave sound energy consumption between High Density Molecular, reduce pneumatic noise, by cryogenic gas with
Pneumatic runner gas mixing, effectively reduces subordinate's impeller intake air temperature, reduces compressor, lifts compressor efficiency.
The advantage that make use of non-oil ultra high vacuum system centrifugal compressor and motor temperature to control, motor return-air loop is set by interior so that
Whole compressor, unit exterior line are succinct, noise reduction, carry effect, bearing cooling, optimization system pipeline, reduce leak source, lifted can
By good effect can be produced in property.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (17)
- A kind of 1. compressor, it is characterised in that including：Motor, the motor include electric machine casing (1) and the cooling duct being arranged in the electric machine casing (1)；First compression unit, first compression unit are arranged on the first end of the motor, and first compression unit includes first shell Body (2) and the first diffuser (4) being connected with first housing (2), motor return-air is provided with first diffuser (4) Mouth (5), the cooling duct is connected by the motor gas returning port (5) with first compression unit.
- 2. compressor according to claim 1, it is characterised in that the one of the close motor of the motor gas returning port (5) Hold as first end, the motor gas returning port (5) is the second end close to one end of first compression unit, the motor gas returning port (5) line at first end and the second end be the first line, the method where the pivot center of first line and the motor To having the first angle between vertical plane, and on the normal direction vertical plane, the first end of the motor gas returning port (5) with it is described The distance of pivot center is less than the second end of the motor gas returning port (5) and the distance of the pivot center.
- 3. compressor according to claim 2, it is characterised in that the span of first angle is 15 ° to 35 °.
- 4. compressor according to claim 2, it is characterised in that first line and motor rotation axis line place Axial vertical plane there is the second angle, and on the axial vertical plane, the first end of the motor gas returning port (5) with it is described The distance of pivot center is less than the second end of the motor gas returning port (5) and the distance of the pivot center.
- 5. compressor according to claim 4, it is characterised in that the span of second angle is 55 ° to 75 °.
- 6. according to the compressor any one of claim 1-5, it is characterised in that the motor gas returning port (5) to be multiple, And be arranged at intervals successively on the first circumference, first circumference is centrally located on the pivot center of the motor.
- 7. compressor according to claim 6, it is characterised in that the motor gas returning port (5) is on first circumference Uniform intervals are set, and the line at the center and the center of circle of first circumference of the two neighboring motor gas returning port (5) is formed 3rd angle, the span of the 3rd angle is 12 ° to 30 °.
- 8. compressor according to claim 1, it is characterised in that the motor also includes stator (6), the stator (6) It is arranged in the electric machine casing (1), and is fixedly connected with the electric machine casing (1), the cooling duct includes the first cooling Section (71), first cooling section (71), which is located on the inwall of the electric machine casing (1), and position is corresponding with the stator (6) sets Put, the opening of first cooling section (71) is towards the stator (6).
- 9. compressor according to claim 8, it is characterised in that first cooling section (71) is along the stator (6) Axial screw extension spiral section.
- 10. compressor according to claim 8, it is characterised in that correspond to the stator on the electric machine casing (1) (6) opening position, it is provided with the motor cooling liquid inlet (81) connected with first cooling section (71).
- 11. compressor according to claim 8, it is characterised in that the motor also includes：Rotor (10), the rotor (10) are located in the stator (6), and the cooling duct also includes the second cooling section (72), Second cooling section (72) includes the gap between the rotor (10) and the stator (6).
- 12. compressor according to claim 1, it is characterised in that the motor also includes bearing assembly, the bearing group Part includes：Bearing (15), the cooling duct also include being arranged on the cooling bearing cooling section that but refrigerant passes through on the bearing (15) (73)。
- 13. compressor according to claim 12, it is characterised in that correspond to the bearing on the electric machine casing (1) (15) opening position, it is provided with the bearing cooling liquid inlet (82) connected with the bearing cooling section (73).
- 14. compressor according to claim 12, it is characterised in that the bearing assembly is two, and correspondingly The both sides of stator (6) are arranged on, the bearing cooling liquid inlet (82) corresponds to the bearing assembly away from first compression unit Set.
- 15. compressor according to claim 1, it is characterised in that the motor also include stator (6), rotor (10) and Bearing (15), the stator (6) is arranged in the electric machine casing (1), and is fixedly connected with the electric machine casing (1), described Cooling duct includes the first cooling section (71), and first cooling section (71) is located on the inwall of the electric machine casing (1) and position Put and be correspondingly arranged with the stator (6), the opening of first cooling section (71) is towards the stator (6)；The rotor (10) In the stator (6), the cooling duct also includes the second cooling section (72), and second cooling section (72) includes described Gap between rotor (10) and the stator (6)；The cooling duct also includes being arranged on the bearing (15) cooling but The bearing cooling section (73) that refrigerant passes through；Refrigerant is passed through in the motor, at least a portion refrigerant passes sequentially through first cooling section (71) and described second Flowed out after cooling section (72) from the motor gas returning port (5), at least refrigerant described in another part is passed sequentially through away from the motor The 3rd cooling section (73), second cooling section (72) and the close motor on the bearing (15) of gas returning port (5) Flowed out after the 3rd cooling section (73) on the bearing (15) of gas returning port (5) from the motor gas returning port (5).
- 16. compressor according to claim 1, it is characterised in that the compressor also includes the second compression unit, and described Two compression units are arranged on the second end of the motor.
- 17. a kind of air conditioner, it is characterised in that including compressor, the compressor is any one of claim 1-16 Compressor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710962857.5A CN107664143B (en) | 2017-10-16 | 2017-10-16 | Compressor and air conditioner with same |
| PCT/CN2017/119425 WO2019075921A1 (en) | 2017-10-16 | 2017-12-28 | Compressor and air conditioner having same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710962857.5A CN107664143B (en) | 2017-10-16 | 2017-10-16 | Compressor and air conditioner with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107664143A true CN107664143A (en) | 2018-02-06 |
| CN107664143B CN107664143B (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710962857.5A Active CN107664143B (en) | 2017-10-16 | 2017-10-16 | Compressor and air conditioner with same |
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| Country | Link |
|---|---|
| CN (1) | CN107664143B (en) |
| WO (1) | WO2019075921A1 (en) |
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| WO2019240479A1 (en) * | 2018-06-12 | 2019-12-19 | 엘지전자 주식회사 | Centrifugal compressor |
| WO2019240480A1 (en) * | 2018-06-12 | 2019-12-19 | 엘지전자 주식회사 | Centrifugal compressor |
| JP2020133577A (en) * | 2019-02-25 | 2020-08-31 | 三菱重工コンプレッサ株式会社 | Compressor |
| CN111795072A (en) * | 2019-04-09 | 2020-10-20 | 青岛海尔智能技术研发有限公司 | Gas bearing gas supply device and motor |
| CN112780583A (en) * | 2021-02-04 | 2021-05-11 | 北京稳力科技有限公司 | Fuel cell stack and two-stage centrifugal compressor |
| CN112983848A (en) * | 2021-02-04 | 2021-06-18 | 北京稳力科技有限公司 | Fuel cell stack and gas supply device |
| CN113606258A (en) * | 2021-08-12 | 2021-11-05 | 珠海格力电器股份有限公司 | Cooling system, air suspension air compressor, air conditioner and car |
| CN115405536A (en) * | 2022-10-31 | 2022-11-29 | 季华实验室 | Magnetic suspension double-suction centrifugal compressor |
| CN117006073A (en) * | 2023-08-22 | 2023-11-07 | 苏州氢启新能源科技有限公司 | Self-pressurizing cooling hydrogen fuel cell air compressor |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107664143B (en) | 2023-10-27 |
| WO2019075921A1 (en) | 2019-04-25 |
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