CN109185180A - A kind of centrifugal compressor and air-conditioning system - Google Patents

A kind of centrifugal compressor and air-conditioning system Download PDF

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Publication number
CN109185180A
CN109185180A CN201811333024.3A CN201811333024A CN109185180A CN 109185180 A CN109185180 A CN 109185180A CN 201811333024 A CN201811333024 A CN 201811333024A CN 109185180 A CN109185180 A CN 109185180A
Authority
CN
China
Prior art keywords
centrifugal compressor
runner
grade
spray
impeller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201811333024.3A
Other languages
Chinese (zh)
Inventor
刘华
张治平
李宏波
陈玉辉
叶文腾
亓静利
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201811333024.3A priority Critical patent/CN109185180A/en
Publication of CN109185180A publication Critical patent/CN109185180A/en
Withdrawn legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08Centrifugal pumps
    • F04D17/10Centrifugal pumps for compressing or evacuating
    • F04D17/12Multi-stage pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02Surge control
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/66Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a kind of centrifugal compressor and air-conditioning systems, centrifugal compressor includes: the grade runner of at least one level impeller, the spiral case equipped with exhaust outlet, connection impeller and spiral case, the refrigerant input unit by air inlet pipeline to grade runner conveying refrigerant, is equipped with the regulating valve for adjusting refrigerant conveying capacity in air inlet pipeline.The present invention can effectively expand the range of operation of centrifugal compressor.

Description

A kind of centrifugal compressor and air-conditioning system
Technical field
The present invention relates to air-conditioning technical field more particularly to a kind of centrifugal compressor and air-conditioning systems.
Background technique
Centrifugal compressor is velocity profile compressor, is easy to happen surge in the operation of small flow, surge not only serious shadow The safety and reliability for ringing compressor, also will affect the range of operation of centrifuge, and range of operation is centrifuge core index One of.
In order to promote the range of operation of compressor, currently used main method has using bypass techniques, works as compressor In Smaller load operation, the gas of exhaust outlet of compressor is backed into compressor air suction mouth, will lead to the waste of energy in this way, together When cannot infinitely be done greatly due to the size of bypass pipe, pass-through capabilities are also conditional.Method also is such as using rotation Turn the measures such as vane diffuser or variable cross section diffuser, by changing the size of Smaller load state lower flow channel, makes Smaller load Under runner match with gas flow, these methods have certain effect to the range of operation for promoting centrifuge, but structure Complicated, moving component is easy failure.
Therefore, how to design a kind of centrifugal compressor of effectively expansion range of operation is that industry technology urgently to be resolved is asked Topic.
Summary of the invention
Have the defects that range of operation is small to solve existing centrifugal compressor, the present invention propose a kind of centrifugal compressor and Air-conditioning system.
The technical solution adopted by the present invention is that designing a kind of centrifugal compressor, comprising: at least one level impeller is equipped with exhaust Mouthful spiral case, connection impeller and spiral case grade runner, by air inlet pipeline to grade runner convey refrigerant refrigerant input unit, into The regulating valve for adjusting refrigerant conveying capacity is equipped in air pipe.
Preferably, when regulating valve is opened, the pressure in refrigerant input unit is greater than the pressure in grade runner.
Preferably, regulating valve is connected with the control system for controlling its working condition.
Preferably, control system includes: to detect the detection device and detection device of the actual operation parameters of centrifugal compressor The control module of connection, control module control to adjust the switch of valve according to actual operation parameters.
Preferably, when actual operation parameters are greater than default operational factor, control module closes regulating valve.
Preferably, when actual operation parameters are less than default operational factor, control module opens regulating valve.
Preferably, when actual operation parameters are equal to default operational factor, control module opens regulating valve.
Preferably, operating parameter is operating load.
Preferably, operating load is refrigerating capacity.
Preferably, refrigerant input unit is heat exchanger.
Preferably, the exhaust outlet of the import connection centrifugal compressor of heat exchanger, the outlet of heat exchanger is connected by air inlet pipeline Logical grade runner.
Preferably, heat exchanger is condenser.
Preferably, grade runner is equipped with several spray-holes, and the central axis of spray-hole wound impeller is uniformly arranged, air inlet pipe Refrigerant is sent into grade runner by road from spray-hole.
Preferably, all spray-hole connections surround the annular spray hole of 360 degree of encirclement impellers.
Preferably, spray-hole is equipped with the jet port being located on grade runner, refrigerant flow direction and grade runner in spray-hole Angle between the middle refrigerant flow direction by jet port is acute angle.
Preferably, at least one gas supplementing opening being additionally provided on grade runner outside connection.
Preferably, centrifugal compressor further include: the air storing cavity being connected between air inlet pipeline and grade runner.
Preferably, the independently divided setting of the air entry of air storing cavity and centrifugal compressor.
Preferably, air storing cavity is in the annular air storing cavity for surrounding the air entry of the centrifugal compressor.
In a preferred embodiment, centrifugal compressor includes: the primary runner and secondary impeller of coaxial arrangement, and primary runner leans on The air entry of nearly centrifugal compressor, secondary impeller is close to spiral case.Grade runner includes: the centre for being connected to primary runner and secondary impeller Grade runner, the export-grade runner for being connected to intergrade runner and spiral case.
Wherein, the outer ring of primary runner is equipped with primary diffuser, and the outer ring of secondary impeller is equipped with secondary diffuser, just Return channel is connected between grade diffuser and secondary diffuser, primary runner and secondary impeller passed through flowing plate separation.Primary expands Depressor crosses formation intergrade runner between flowing plate and return channel, and export-grade runner is formed between secondary diffuser and return channel.
Preferably, primary diffuser is equipped with spray-hole, one end connection intergrade runner, the other end of spray-hole be connected into Air pipe.
Preferably, return channel is equipped with the gas supplementing opening outside connection.
The invention also provides a kind of air-conditioning systems, including above-mentioned centrifugal compressor.
Compared with prior art, grade runner of the invention connects refrigerant input unit by air inlet pipeline, by regulating valve control The size for matchmaker's conveying capacity of freezing sprays the high-pressure gaseous refrigerant in refrigerant input unit in the operation of centrifugal compressor Smaller load It is mapped in grade runner and forms high-speed gas, while supplementing grade runner internal gas, the separation group inside grade runner is taken away, Centrifugal compressor surge is avoided, to promote the range of operation of centrifugal compressor.
Detailed description of the invention
Below with reference to embodiment and attached drawing, the present invention is described in detail, in which:
Fig. 1 is that the refrigerant of centrifugal compressor in the present invention flows to schematic diagram;
Fig. 2 is the partial enlarged view of centrifugal compressor in the present invention;
Fig. 3 is the structural schematic diagram of primary diffuser in the present invention;
Fig. 4 is the diagrammatic cross-section of primary diffuser in the present invention.
Specific embodiment
As shown in Figure 1, centrifugal compressor proposed by the present invention, comprising: at least one level impeller, the spiral case 1 equipped with exhaust outlet, Refrigerant input unit 3, connection 3 and of refrigerant input unit for being connected to the grade runner 2 of impeller and spiral case 1, conveying refrigerant to grade runner 2 The air inlet pipeline 4 of grade runner 2, the regulating valve 5 for adjusting refrigerant conveying capacity is equipped in air inlet pipeline 4.Regulating valve 5, which is connected with, controls it The control system of working condition, control system include: the detection device and detection for the actual operation parameters for detecting centrifugal compressor The control module of device connection, the actual operation parameters that detection device will test are sent to control module, and control module will be real After border operating parameter and default operational factor comparison, the switch of valve 5 is controlled to adjust according to comparing result.
In a preferred embodiment, operating parameter is operating load, and operating load is selected as the refrigerating capacity of compressor, refrigerant input Device 3 is heat exchanger, and the exhaust outlet of the import connection centrifugal compressor of heat exchanger, the outlet of heat exchanger is connected by air inlet pipeline 4 Logical grade runner 2, heat exchanger herein is condenser within air-conditioning systems.Specific state of a control is as follows, when actual motion load When greater than default operating load, the refrigerating capacity of compressor is larger, and gaseous coolant flow is big in grade runner 2, the stream of grade runner 2 everywhere Fast high, the gas in grade runner 2 is in normal operating conditions, and surge phenomenon will not occur for compressor, and control module is closed at this time Regulating valve 5;When actual operation parameters are less than or equal to default operational factor, the refrigerating capacity of compressor is smaller, in grade runner 2 Gas flow is less than flow when declared working condition, and the fluid velocity of grade runner 2 everywhere is lower, and it is existing to be easy to produce boundary layer separation As gas segregation phenomenon seriously can cause the surge of compressor, and control module opens regulating valve 5, refrigerant input unit 3 at this time Inside is equipped with high-pressure gaseous refrigerant, and when regulating valve 5 is opened, the pressure in refrigerant input unit 3 is greater than the pressure in grade runner 2, So that high pressure gas enters in grade runner 2 from air inlet pipeline 4, supplements the flow in grade runner 2 and increase the stream in grade runner 2 Body speed avoids compressor that surge occurs in Smaller load working condition, achievees the effect that widen centrifuge range of operation.
Preferably, as shown in Figure 1, 2, grade runner 2 is equipped with several spray-holes 21, the center of 21 wound impeller of spray-hole Axis is uniformly arranged, and spray-hole 21 is obliquely installed, and spray-hole 21 is equipped with the jet port being located on grade runner 2, cold in spray-hole 21 The angle passed through between the refrigerant flow direction at jet port in matchmaker flow direction and grade runner 2 is acute angle, and air inlet pipeline 4 will be cold Matchmaker sprays into grade runner 2 from refrigerant flow direction high speed of the spray-hole 21 in grade runner 2, and spraying the fluid entered at a high speed has Effect improves the speed of fluid in grade runner 2, further avoids the generation of compressor surge.More preferably, as shown in Figure 3,4, institute There is spray-hole 21 to be connected to the annular spray hole for surrounding 360 degree of encirclement impellers, can make to spray from refrigerant input unit 3 in this way It is relatively uniform to the gas in grade runner 2, reduce 2 internal losses of grade runner.At least one gas supplementing opening is additionally provided on grade runner 2 22, one end connection grade runner 2 of gas supplementing opening 22, other end connection are external.
As shown in Figure 1, centrifugal compressor further include: the air storing cavity 6 being connected between air inlet pipeline 4 and grade runner 2, gas storage The air entry 7 of chamber 6 and centrifugal compressor separates mutually indepedent setting by sealing element, and air storing cavity 6 is in the annular for surrounding air entry 7 Air storing cavity, refrigerant more evenly enter grade runner 2 from annular air storing cavity.
In a preferred embodiment, as shown in Figures 2 to 4, centrifugal compressor includes: the primary runner 8 and secondary of coaxial arrangement Impeller 9, grade runner include: intergrade runner 23 and export-grade runner 24, and intergrade runner 23 is connected to primary runner 8 and secondary leaf Wheel 9, the connection intergrade runner of export-grade runner 24 and spiral case 1, the outer ring of primary runner 8 is equipped with primary diffuser 10, secondary The outer ring of grade impeller 9 is equipped with secondary diffuser 11, is connected with return channel 12 between primary diffuser 10 and secondary diffuser 11, Primary runner 8 and secondary impeller 9 passed through the separation of flowing plate 13, and primary diffuser 10 is formed between flowing plate 13 and return channel 12 excessively Intergrade runner 23, forms export-grade runner 24 between secondary diffuser 11 and return channel 12, the above-mentioned setting of spray-hole 21 exists On primary diffuser 10, gas supplementing opening 22 is arranged on return channel 12.It certainly, can be as needed in primary runner 8 in actual design Multistage intermediate impeller is coaxially disposed between secondary impeller 9, structure is similar with both stage impellers, and the outer ring of each impeller is respectively provided with Diffuser, two neighboring diffuser connect return channel, pass through flowing plate separation between adjacent impeller.
The invention also provides a kind of air-conditioning systems, including above-mentioned centrifugal compressor.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.

Claims (26)

1. a kind of centrifugal compressor, comprising: at least one level impeller, the spiral case (1) equipped with exhaust outlet, the connection impeller and described The grade runner (2) of spiral case (1), which is characterized in that further include: refrigerant is conveyed to the grade runner (2) by air inlet pipeline (4) Refrigerant input unit (3) is equipped with the regulating valve (5) for adjusting refrigerant conveying capacity in the air inlet pipeline (4).
2. centrifugal compressor as described in claim 1, which is characterized in that when the regulating valve (5) is opened, the refrigerant input Pressure in device (3) is greater than the pressure in the grade runner (2).
3. centrifugal compressor as described in claim 1, which is characterized in that the regulating valve (5), which is connected with, controls its work shape The control system of state.
4. centrifugal compressor as claimed in claim 3, which is characterized in that the control system includes: the detection centrifugation pressure The detection device of the actual operation parameters of contracting machine, the control module connecting with the detection device, the control module is according to institute State the switch that actual operation parameters control the regulating valve (5).
5. centrifugal compressor as claimed in claim 4, which is characterized in that when the actual operation parameters are greater than default operation ginseng When number, the control module closes the regulating valve (5).
6. centrifugal compressor as claimed in claim 4, which is characterized in that when the actual operation parameters are less than default operation ginseng When number, the control module opens the regulating valve (5).
7. centrifugal compressor as claimed in claim 4, which is characterized in that when the actual operation parameters are equal to default operation ginseng When number, the control module opens the regulating valve (5).
8. centrifugal compressor as claimed in claim 4, which is characterized in that the operating parameter is operating load.
9. centrifugal compressor as claimed in claim 8, which is characterized in that the operating load is refrigerating capacity.
10. centrifugal compressor as described in any one of claim 1 to 9, which is characterized in that the refrigerant input unit (3) is Heat exchanger.
11. centrifugal compressor as claimed in claim 10, which is characterized in that the import of the heat exchanger connects the exhaust Mouthful, the outlet of the heat exchanger is connected to the grade runner (2) by the air inlet pipeline (4).
12. centrifugal compressor as claimed in claim 11, which is characterized in that the heat exchanger is condenser.
13. centrifugal compressor as described in claim 1, which is characterized in that the grade runner (2) is equipped with several spray-holes (21), refrigerant is sent into the grade runner (2) by the air inlet pipeline (4) from the spray-hole (21).
14. centrifugal compressor as claimed in claim 13, which is characterized in that the spray-hole (21) is in the impeller Mandrel is uniformly arranged.
15. centrifugal compressor as claimed in claim 14, which is characterized in that all spray-hole (21) connections surround one The annular spray hole of 360 degree of encirclement impellers.
16. centrifugal compressor as claimed in claim 13, which is characterized in that the spray-hole (21), which is equipped with, is located at the grade stream Jet port on road (2), by jet port in the refrigerant flow direction and the grade runner (2) in the spray-hole (21) Angle between refrigerant flow direction is acute angle.
17. centrifugal compressor as described in claim 1, which is characterized in that be additionally provided on the grade runner (2) outside connection At least one gas supplementing opening (22).
18. centrifugal compressor as described in claim 1, which is characterized in that further include: be connected on the air inlet pipeline (4) and Air storing cavity (6) between grade runner (2).
19. centrifugal compressor as claimed in claim 18, which is characterized in that the air storing cavity (6) and the centrifugal compressor Air entry (7) independently divided setting.
20. centrifugal compressor as claimed in claim 18, which is characterized in that the air storing cavity (6) is to surround the centrifugation pressure The annular air storing cavity of the air entry (7) of contracting machine.
21. centrifugal compressor as described in claim 1, which is characterized in that the centrifugal compressor is equipped with the first of coaxial arrangement Grade impeller (8) and secondary impeller (9), air entry (7) of the primary runner (8) close to the centrifugal compressor, the secondary Impeller (9) is close to the spiral case (1).
22. centrifugal compressor as claimed in claim 21, which is characterized in that the grade runner (2) includes: the connection primary Impeller (8) and the intergrade runner (23) of the secondary impeller (9) are connected to the intergrade runner (23) and the spiral case (1) Export-grade runner (24).
23. centrifugal compressor as claimed in claim 22, which is characterized in that the outer ring of the primary runner (8) is equipped with just Grade diffuser (10), the outer ring of the secondary impeller (9) is equipped with secondary diffuser (11), the primary diffuser (10) and secondary It is connected with return channel (12) between grade diffuser (11), the primary runner (8) and the secondary impeller (9) passed through flowing plate (13) separate;The primary diffuser (10) forms the intergrade runner (23) between flowing plate (13) and return channel (12) excessively, The export-grade runner (24) is formed between the secondary diffuser (11) and return channel (12).
24. centrifugal compressor as claimed in claim 23, which is characterized in that the primary diffuser (10) is equipped with spray-hole (21), one end of the spray-hole (21) is connected to the intergrade runner (23), the other end is connected to the air inlet pipeline (4).
25. centrifugal compressor as claimed in claim 23, which is characterized in that the return channel (12) is equipped with outside connection Gas supplementing opening (22).
26. a kind of air-conditioning system characterized by comprising such as the described in any item centrifugal compressors of claim 1 to 25.
CN201811333024.3A 2018-11-09 2018-11-09 A kind of centrifugal compressor and air-conditioning system Withdrawn CN109185180A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811333024.3A CN109185180A (en) 2018-11-09 2018-11-09 A kind of centrifugal compressor and air-conditioning system

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Application Number Priority Date Filing Date Title
CN201811333024.3A CN109185180A (en) 2018-11-09 2018-11-09 A kind of centrifugal compressor and air-conditioning system

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111207502A (en) * 2020-01-17 2020-05-29 广东美的暖通设备有限公司 Operation control method, operation control device, air conditioning system, and storage medium
CN115653913A (en) * 2022-10-26 2023-01-31 青岛海信日立空调系统有限公司 Outdoor unit and air conditioning system
WO2024087826A1 (en) * 2022-10-26 2024-05-02 青岛海信日立空调系统有限公司 Outdoor unit and air conditioning system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002327700A (en) * 2001-04-27 2002-11-15 Mitsubishi Heavy Ind Ltd Centrifugal compressor and refrigerating machine
US20080232952A1 (en) * 2004-06-07 2008-09-25 Ronglei Gu Compressor with Controllable Recirculation and Method Therefor
GB201005169D0 (en) * 2010-03-26 2010-05-12 Linde Ag Compressors
CN103206389A (en) * 2012-01-12 2013-07-17 珠海格力电器股份有限公司 Multistage refrigeration compressor and middle air supplementation structure thereof
CN107355431A (en) * 2017-07-10 2017-11-17 珠海格力电器股份有限公司 Diffuser and compressor
CN209012086U (en) * 2018-11-09 2019-06-21 珠海格力电器股份有限公司 A kind of centrifugal compressor and air-conditioning system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002327700A (en) * 2001-04-27 2002-11-15 Mitsubishi Heavy Ind Ltd Centrifugal compressor and refrigerating machine
US20080232952A1 (en) * 2004-06-07 2008-09-25 Ronglei Gu Compressor with Controllable Recirculation and Method Therefor
GB201005169D0 (en) * 2010-03-26 2010-05-12 Linde Ag Compressors
CN103206389A (en) * 2012-01-12 2013-07-17 珠海格力电器股份有限公司 Multistage refrigeration compressor and middle air supplementation structure thereof
CN107355431A (en) * 2017-07-10 2017-11-17 珠海格力电器股份有限公司 Diffuser and compressor
CN209012086U (en) * 2018-11-09 2019-06-21 珠海格力电器股份有限公司 A kind of centrifugal compressor and air-conditioning system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111207502A (en) * 2020-01-17 2020-05-29 广东美的暖通设备有限公司 Operation control method, operation control device, air conditioning system, and storage medium
CN111207502B (en) * 2020-01-17 2021-06-15 广东美的暖通设备有限公司 Operation control method, operation control device, air conditioning system, and storage medium
CN115653913A (en) * 2022-10-26 2023-01-31 青岛海信日立空调系统有限公司 Outdoor unit and air conditioning system
CN115653913B (en) * 2022-10-26 2023-12-15 青岛海信日立空调系统有限公司 Outdoor unit and air conditioning system
WO2024087826A1 (en) * 2022-10-26 2024-05-02 青岛海信日立空调系统有限公司 Outdoor unit and air conditioning system

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Application publication date: 20190111