CN109185180A - A kind of centrifugal compressor and air-conditioning system - Google Patents
A kind of centrifugal compressor and air-conditioning system Download PDFInfo
- 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
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- 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.)
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 10
- 239000003507 refrigerant Substances 0.000 claims abstract description 35
- 230000001105 regulatory effect Effects 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims description 8
- 230000001502 supplementing effect Effects 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 6
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 241000208340 Araliaceae Species 0.000 claims 3
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 3
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 3
- 235000008434 ginseng Nutrition 0.000 claims 3
- 238000005119 centrifugation Methods 0.000 claims 2
- 238000000034 method Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002699 waste material Substances 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
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
- F04D17/12—Multi-stage 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
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Landscapes
- 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
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.
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 |
Applications Claiming Priority (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 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109185180A true CN109185180A (en) | 2019-01-11 |
Family
ID=64938912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811333024.3A Withdrawn CN109185180A (en) | 2018-11-09 | 2018-11-09 | A kind of centrifugal compressor and air-conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109185180A (en) |
Cited By (3)
| 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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| 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 |
-
2018
- 2018-11-09 CN CN201811333024.3A patent/CN109185180A/en not_active Withdrawn
Patent Citations (6)
| 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)
| 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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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190111 |