CN102538274A - Multiple on-line system without gas-liquid separator and control mode thereof - Google Patents
Multiple on-line system without gas-liquid separator and control mode thereof Download PDFInfo
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- CN102538274A CN102538274A CN2012100365779A CN201210036577A CN102538274A CN 102538274 A CN102538274 A CN 102538274A CN 2012100365779 A CN2012100365779 A CN 2012100365779A CN 201210036577 A CN201210036577 A CN 201210036577A CN 102538274 A CN102538274 A CN 102538274A
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- compressor
- indoor set
- superheat
- expansion valve
- electric expansion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses a multiple on-line system without a gas-liquid separator and a control mode thereof. The multiple on-line system comprises an outdoor heat exchanger, a compressor, oil content and a plurality of indoor units, wherein the oil content is arranged between the compressor and a four-way valve; the four-way valve is connected with the outdoor heat exchanger, the indoor units and a low-pressure air suction port of the compressor respectively; the indoor units are connected with the outdoor heat exchanger; an electronic expansion valve is arranged on a pipeline at an output end of the indoor units; and the electronic expansion valve is collected to a connecting pipe through the pipeline and is connected to the outdoor heat exchanger. The electronic expansion valve is arranged at the output end of each indoor unit, and an actual degree of superheat of the compressor is taken as leading adjustment so as to ensure that the degree of superheat at the low-pressure air suction port of the compressor is positioned in a balance state; and therefore, the compressor can be safely operated under any working condition. Assisted by self-adjustment of the indoor units, amount of refrigerants between each indoor unit can be balanced; and therefore, the gas-liquid separator can be eliminated, the energy efficiency of the unit can be improved, the system structure is simplified, and the product cost is reduced.
Description
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Technical field
The present invention relates to the air-conditioning product technical field, be specifically related to a kind of many on-line systems.
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Background technology
The multiple unit is to drag many modes; It is that a main frame drives several indoor sets; What adopt is frequency-changeable compressor, and most of multiple central air-conditioning unit can be regulated between 10-130% automatically, and it has advantages such as effective, that efficient is high, power consumption is low.In the evaporimeter of air-conditioning; Because liquid refrigerant evaporates in evaporimeter; Become the process of gas by liquid refrigerant, consider the variation of load, and the amount of liquid refrigerant that gets into evaporimeter can not freely be controlled; Therefore may can not all evaporate by some cold-producing medium, can directly enter into compressor.Because the Incoercibility of liquid refrigerant; So before not getting into compressor; At first to gas-liquid be separated from each other and come; Prevent that the low-pressure low-temperature steam that returns compressor from carrying too much liquid refrigerant entering compresser cylinder, guarantees that getting into the whole of compressor is gas, to guarantee the eupraxic running of compression.In order to address this problem, so designed gas-liquid separator, be installed in the position, gateway of compressor, gas-liquid is separated, be gaseous refrigerant with what guarantee to get into compressor.Yet, gas-liquid separator itself is installed can be made the structure of unit become more complicated, thereby increase the cost of product; In addition, facts have proved that the separating effect of gas-liquid separator is limited; Common gas-liquid separator effect is good inadequately, and high-precision gas-liquid separator then cost is quite expensive.
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Summary of the invention
The technical problem that the present invention will solve provides many on-line systems and the control mode thereof that a kind of cost is lower, need not to install gas-liquid separator.
For solving the problems of the technologies described above; The present invention adopts following technical scheme: a kind of many on-line systems of not having gas-liquid separator; It is characterized in that: these many on-line systems comprise outdoor heat exchanger, compressor, oil content and some indoor sets, and oil content is located between compressor and the cross valve, and the high pressure gas outlet of compressor connects the input port of oil content; The main delivery outlet of oil content connects first interface of cross valve, and the secondary delivery outlet of oil content connects the low pressure air suction mouth of compressor; The second interface junction chamber external heat exchanger of cross valve, the 3rd interface connects indoor set, and the 4th interface connects compressor low pressure air suction mouth; Indoor set junction chamber external heat exchanger connects through connecting leg between aforementioned each equipment; The pipeline of indoor set output is provided with electric expansion valve, and each indoor set all is connected with an electric expansion valve, and all electric expansion valves are connected to outdoor heat exchanger after being aggregated into connecting leg by the road.
Further, on the 3rd interface of cross valve and the connecting leg between the indoor set, throttling arrangement is installed.
Further, on the connecting leg between indoor set and the outdoor heat exchanger, throttling arrangement is installed.
Further, the connecting leg between the 4th interface of cross valve and the compressor low pressure air suction mouth is provided with capillary.
The control mode of many on-line systems of said no gas-liquid separator; It is characterized in that: unit is when running refrigerating pattern or heating mode; Electric expansion valve is regulated according to the actual degree of superheat of compressor low pressure air suction mouth: when the actual degree of superheat during less than the target degree of superheat of regulation, the electric expansion valve of controlling all indoor sets that are in refrigeration mode or heating mode reduces aperture by the variation of regulation; When the actual degree of superheat greater than the regulation the target degree of superheat time; The electric expansion valve that control is in the indoor set of refrigeration mode or heating mode increases aperture by the variation of stipulating; Be in poised state with this degree of superheat of guaranteeing compressor low pressure air suction mouth, make compressor under any operating mode can both safety operation; During the running refrigerating pattern, electric expansion valve also carries out auxiliary adjustment according to the degree of superheat of indoor set self simultaneously, with the distribution of the refrigerant amount between each indoor set of balance; Operation is during heating mode, and electric expansion valve also carries out auxiliary adjustment according to the degree of supercooling of indoor set self simultaneously, with the distribution of balance refrigerant amount between the machine in each.
The present invention installs an electric expansion valve through the output of giving every indoor set; Make system under any operating mode; The actual degree of superheat with compressor is regulated as leading; Be in poised state with this degree of superheat of guaranteeing compressor low pressure air suction mouth, make compressor under any operating mode can both safety operation; And with the adjusting of indoor set self as auxiliary, again can balance the balance of refrigerant amount between machine in each, therefore can cancel gas-liquid separator, can improve the efficiency of unit, and simplify the structure of system, reduce the cost of product.
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Description of drawings
Fig. 1 is a structural representation block diagram of the present invention.
Among the figure, 1 is electric expansion valve, and 2 is connecting leg, and 3 is cross valve, and 4 is throttling arrangement, and 5 is throttling arrangement, and 6 is capillary.
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The specific embodiment
In the present embodiment; With reference to Fig. 1, many on-line systems of said no gas-liquid separator, these many on-line systems comprise outdoor heat exchanger, compressor, oil content (oil eliminator) and some indoor sets; Oil content is located between compressor and the cross valve 3; The high pressure gas outlet of compressor connects the input port of oil content, and the main delivery outlet of oil content connects first interface of cross valve 3, and the secondary delivery outlet of oil content connects the low pressure air suction mouth of compressor; The second interface junction chamber external heat exchanger of cross valve 3, the 3rd interface connects indoor set, and the 4th interface connects compressor low pressure air suction mouth; Indoor set junction chamber external heat exchanger connects through connecting leg 2 between aforementioned each equipment; The pipeline of indoor set output is provided with electric expansion valve 1, and each indoor set all is connected with an electric expansion valve 1, is connected to outdoor heat exchanger after all electric expansion valves 1 are aggregated into connecting leg 2 by the road.
On the 3rd interface of cross valve 3 and the connecting leg between the indoor set, throttling arrangement 4 is installed.
Throttling arrangement 5 is installed on the connecting leg between indoor set and the outdoor heat exchanger.
Connecting leg 2 between the 4th interface of cross valve 3 and the compressor low pressure air suction mouth is provided with capillary 6.
The control mode of many on-line systems of said no gas-liquid separator; Unit is when running refrigerating pattern or heating mode; Electric expansion valve 1 is regulated according to the actual degree of superheat of compressor low pressure air suction mouth: when the actual degree of superheat during less than the target degree of superheat of regulation, the electric expansion valve 1 of controlling all indoor sets that are in refrigeration mode or heating mode reduces aperture by the variation of regulation; When the actual degree of superheat greater than the regulation the target degree of superheat time; The electric expansion valve 1 that control is in the indoor set of refrigeration mode or heating mode increases aperture by the variation of stipulating; Be in poised state with this degree of superheat of guaranteeing compressor low pressure air suction mouth, make compressor under any operating mode can both safety operation; During the running refrigerating pattern (refrigerant flow direction is pressed shown in the solid line guiding arrow), electric expansion valve 1 also carries out auxiliary adjustment according to the degree of superheat of indoor set self simultaneously, with the distribution of the refrigerant amount between each indoor set of balance; Operation is (refrigerant flow direction press dotted line and is led shown in the arrow) during heating mode, and electric expansion valve 1 also carries out auxiliary adjustment according to the degree of supercooling of indoor set self simultaneously, with the distribution of balance refrigerant amount between the machine in each.
Below the present invention is done a detailed description, the above is merely the present invention's preferred embodiment, when can not limiting practical range of the present invention, promptly allly does impartially to change and modify according to the application's scope, all should still belong in the covering scope of the present invention.
Claims (5)
1. many on-line systems of not having gas-liquid separator; It is characterized in that: these many on-line systems comprise outdoor heat exchanger, compressor, oil content and some indoor sets; Oil content is located between compressor and the cross valve; The high pressure gas outlet of compressor connects the input port of oil content, and the main delivery outlet of oil content connects first interface of cross valve, and the secondary delivery outlet of oil content connects the low pressure air suction mouth of compressor; The second interface junction chamber external heat exchanger of cross valve, the 3rd interface connects indoor set, and the 4th interface connects compressor low pressure air suction mouth; Indoor set junction chamber external heat exchanger connects through connecting leg between aforementioned each equipment; The pipeline of indoor set output is provided with electric expansion valve, and each indoor set all is connected with an electric expansion valve, and all electric expansion valves are connected to outdoor heat exchanger after being aggregated into connecting leg by the road.
2. many on-line systems of no gas-liquid separator according to claim 1 is characterized in that: on the 3rd interface of cross valve and the connecting leg between the indoor set, throttling arrangement is installed.
3. many on-line systems of no gas-liquid separator according to claim 1 is characterized in that: on the connecting leg between indoor set and the outdoor heat exchanger, throttling arrangement is installed.
4. many on-line systems of no reservoir according to claim 1, it is characterized in that: the connecting leg between the 4th interface of cross valve and the compressor low pressure air suction mouth is provided with capillary.
5. the control mode of many on-line systems of the described no gas-liquid separator of claim 1; It is characterized in that: unit is when running refrigerating pattern or heating mode; Electric expansion valve is regulated according to the actual degree of superheat of compressor low pressure air suction mouth: when the actual degree of superheat during less than the target degree of superheat of regulation, the electric expansion valve of controlling all indoor sets that are in refrigeration mode or heating mode reduces aperture by the variation of regulation; When the actual degree of superheat greater than the regulation the target degree of superheat time; The electric expansion valve that control is in the indoor set of refrigeration mode or heating mode increases aperture by the variation of stipulating; Be in poised state with this degree of superheat of guaranteeing compressor low pressure air suction mouth, make compressor under any operating mode can both safety operation; During the running refrigerating pattern, electric expansion valve also carries out auxiliary adjustment according to the degree of superheat of indoor set self simultaneously, with the distribution of the refrigerant amount between each indoor set of balance; Operation is during heating mode, and electric expansion valve also carries out auxiliary adjustment according to the degree of supercooling of indoor set self simultaneously, with the distribution of balance refrigerant amount between the machine in each.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100365779A CN102538274A (en) | 2012-02-19 | 2012-02-19 | Multiple on-line system without gas-liquid separator and control mode thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100365779A CN102538274A (en) | 2012-02-19 | 2012-02-19 | Multiple on-line system without gas-liquid separator and control mode thereof |
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| CN102538274A true CN102538274A (en) | 2012-07-04 |
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| CN2012100365779A Pending CN102538274A (en) | 2012-02-19 | 2012-02-19 | Multiple on-line system without gas-liquid separator and control mode thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788402A (en) * | 2012-07-26 | 2012-11-21 | 广东美的暖通设备有限公司 | Control method of air conditioning refrigerant circulation system and air conditioning system |
| CN104896785A (en) * | 2015-05-15 | 2015-09-09 | 广东美的暖通设备有限公司 | Enhanced vapor injection multi-online air conditioning system and control method thereof |
| CN106352445A (en) * | 2016-08-19 | 2017-01-25 | 广东美的暖通设备有限公司 | Multi-online system and control method thereof |
| CN110296518A (en) * | 2019-07-12 | 2019-10-01 | 宁波奥克斯电气股份有限公司 | The multi-joint interior machine control method for electronic expansion valve of one kind, device and air conditioner |
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| CN201637186U (en) * | 2010-02-03 | 2010-11-17 | 广东美的电器股份有限公司 | One-connected-more air-conditioning heat pump unit |
| CN201875996U (en) * | 2010-05-26 | 2011-06-22 | 广东芬尼克兹节能设备有限公司 | Multidimensional heat pump set |
| CN102242996A (en) * | 2011-07-05 | 2011-11-16 | 海尔集团公司 | Method for controlling opening of electronic expansion valve in central air-conditioning unit |
| CN202547176U (en) * | 2012-02-19 | 2012-11-21 | 周玉涛 | Multi-connected air conditioner without gas-liquid separator |
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2012
- 2012-02-19 CN CN2012100365779A patent/CN102538274A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH04359762A (en) * | 1991-06-05 | 1992-12-14 | Toshiba Corp | Air conditioner |
| JPH0763429A (en) * | 1993-08-26 | 1995-03-10 | Matsushita Refrig Co Ltd | Mult-room type air conditioner |
| CN1455197A (en) * | 2002-04-29 | 2003-11-12 | 三星电子株式会社 | Multiple machine-group air conditioner |
| CN2586921Y (en) * | 2002-06-29 | 2003-11-19 | 海尔集团公司 | Coolant controller for fixed-frequency multiple air-conditioning system |
| CN1782585A (en) * | 2004-11-30 | 2006-06-07 | 乐金电子(天津)电器有限公司 | One dragging more air conditioner and its control method |
| CN101338951A (en) * | 2008-08-18 | 2009-01-07 | 南京天加空调设备有限公司 | Water cooling heat pump type multiple air-conditioning unit |
| CN201637186U (en) * | 2010-02-03 | 2010-11-17 | 广东美的电器股份有限公司 | One-connected-more air-conditioning heat pump unit |
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| CN202547176U (en) * | 2012-02-19 | 2012-11-21 | 周玉涛 | Multi-connected air conditioner without gas-liquid separator |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102788402A (en) * | 2012-07-26 | 2012-11-21 | 广东美的暖通设备有限公司 | Control method of air conditioning refrigerant circulation system and air conditioning system |
| CN102788402B (en) * | 2012-07-26 | 2014-11-26 | 广东美的暖通设备有限公司 | Control method of air conditioning refrigerant circulation system and air conditioning system |
| CN104896785A (en) * | 2015-05-15 | 2015-09-09 | 广东美的暖通设备有限公司 | Enhanced vapor injection multi-online air conditioning system and control method thereof |
| CN104896785B (en) * | 2015-05-15 | 2017-06-09 | 广东美的暖通设备有限公司 | A kind of air injection enthalpy-increasing multi-online air-conditioning system and its control method |
| CN106352445A (en) * | 2016-08-19 | 2017-01-25 | 广东美的暖通设备有限公司 | Multi-online system and control method thereof |
| CN106352445B (en) * | 2016-08-19 | 2019-12-03 | 广东美的暖通设备有限公司 | Multi-line system and its control method |
| CN110296518A (en) * | 2019-07-12 | 2019-10-01 | 宁波奥克斯电气股份有限公司 | The multi-joint interior machine control method for electronic expansion valve of one kind, device and air conditioner |
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Application publication date: 20120704 |