CN103528271A - Oil circuit balancing system of frequency-conversion multi-connected unit - Google Patents
Oil circuit balancing system of frequency-conversion multi-connected unit Download PDFInfo
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- CN103528271A CN103528271A CN201310493672.6A CN201310493672A CN103528271A CN 103528271 A CN103528271 A CN 103528271A CN 201310493672 A CN201310493672 A CN 201310493672A CN 103528271 A CN103528271 A CN 103528271A
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- oil
- compressor
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- connected unit
- balance system
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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
Abstract
The invention relates to an oil circuit balancing system of a frequency-conversion multi-connected unit. The oil circuit balancing system of the frequency-conversion multi-connected unit comprises at least one outdoor unit. Each outdoor unit comprises a plurality of compressors connected in parallel, an oil separator and a gas-liquid separator, an exhaust port of each compressor is connected with a refrigerant inlet of the oil separator, a suction port of each compressor is connected with the gas-liquid separator, the oil separator is provided with a first oil outlet and a second oil outlet, the position of the first oil outlet is lower than the position of the second oil outlet, the first oil outlet is connected with the suction port of each compressor, and the second oil outlet is connected with the other or multiple outdoor units. The oil circuit balancing system of the frequency-conversion multi-connected unit avoids the risks that an outdoor unit oil circuit is constantly open, always keeps high pressure and has oil seals, and the risks that when a single compressor operates, oil return capillary pipes of all the compressors are in a bypass state, affect the performance and the like. The oil circuit balancing system of the frequency-conversion multi-connected unit guarantees that the oil of the outdoor unit rich in oil flows into the outdoor unit lack of oil when the installation conditions are complex.
Description
Technical field
the present invention relates to connected machine, particularly relate to a kind of oil way balance system of connected unit.
Background technology
in the reliability of connected machine, in off-premises station, the reliability of compressor lubricant oil has accounted for greatly, compressor is because compressor oil starvation causes because insufficient lubrication lost efficacy greatly, so the device of oil way balance plays very large impact to the reliability of complete machine in the design of connected machine.In the design of prior art:
design two oil eliminators for one: two compressor, realize all oil of intersection, and between off-premises station, nothing is all oily, can not guarantee that the oil of the off-premises station of rich oil flows to oil-poor off-premises station the inside in the time of mounting condition complexity;
design two oil eliminators for two: two compressors, the oil equalizing pipe road of compressor is connected to the equal oil port of two compressors, equal hydraulic fluid port by compressor carries out equal oil, in the time of single compressor operation, the oil return capillary of all compressors is all bypass, affect performance, two compressors of same off-premises station cannot guarantee that oil mass is consistent all the time;
design three: two compressors and share an oil eliminator, oil return is to return-air house steward, between off-premises station, equal oil is by the oil circuit magnetic valve of low-pressure side, on oil equalizing pipe road, keep high pressure constantly, the oil content of all off-premises stations is connected to oil equalizing pipe road by check valve, off-premises station oil circuit is surveyed and is often opened, and always keeps high pressure, has the hidden danger of oil sealing.
Summary of the invention
the object of the invention is to provide a kind of oil way balance system of connected unit.
for achieving the above object, the technical solution used in the present invention is:
because technique scheme is used, the present invention compared with prior art has following advantages:
1, all oil is reliable for the different compressors between same off-premises station, under normal circumstances can be partially not oily, due to the compressor adopting with oil-balancing system, the unnecessary oil of compressor can be expelled to oil eliminator from exhaust outlet along with refrigerant, from oil eliminator, divides and gets back to compressor air suction mouth;
2, multimode off-premises station adopts all oil of pressure reduction, and in uneven oil, pipeline the inside is low-pressure side, can prevent that fluid-tight oil sealing from damaging pipeline;
3, the compressor oil return stopping is truncated, and prevents that unnecessary refrigerator oil from flowing out, and improves the operational efficiency of machine simultaneously.
Accompanying drawing explanation
accompanying drawing 1 is the schematic diagram of the present embodiment one;
accompanying drawing 2 is the schematic diagram of the present embodiment two.
wherein: 10, frequency-changeable compressor; 11, invariable frequency compressor; 2, oil eliminator; 20, the first oil-out; 21, the second oil-out; 3, gas-liquid separator; 4, blast pipe; 5, oil return capillary; 6, oil equalizing pipe; 60, oil equalizing pipe branch road; 7, check valve; 8, normally open solenoid valve; 9, normally closed solenoid valve.
The specific embodiment
below in conjunction with drawings and Examples, the invention will be further described:
embodiment mono-:
the oil way balance system of a kind of connected unit as shown in Figure 1, it comprises at least one off-premises station, and forms an outer machine module, every off-premises station comprises two frequency-changeable compressors that are arranged in parallel 10, oil eliminator 2 and a gas-liquid separator 3.Wherein: oil eliminator 2 offers the first oil-out 20, the second oil-out 21, and the first oil-out 20 offer position lower than the position of offering of the second oil-out 21, guarantee compressor in worst situation, can move t hour not oil starvation (t is according to the equal oil time before off-premises station, the start capacity of system and the output frequency of compressor are determined least favorable situation), higher than the compressor oil of the second oil-out 21 oil levels, will all in oil, be discharged to an other off-premises station.The first oil-out 20 is connected with the air entry of frequency-changeable compressor 10, be used for to frequency-changeable compressor 10 oil returns, the second 21 of oil-outs guarantee the basic oil mass that frequency-changeable compressor 10 needs when system oil return seldom, and the lubricating oil outside basic oil mass drains into the off-premises station of other oil starvations when off-premises station is all oily.Concrete connected mode is as follows:
the exhaust outlet of frequency-changeable compressor 10 is connected by blast pipe 4 with the refrigerant entrance of oil eliminator 2, and blast pipe 4 is provided with check valve 7; The first oil-out 20 of oil eliminator 2 is connected with the air entry of frequency-changeable compressor 10 by oil return capillary 5, oil return capillary 5 is provided with normally open solenoid valve 8, when single compressor turns round, close the normally open solenoid valve that stops compressor oil circuit, can improve operational efficiency and be more conducive to oil eliminator trapped fuel.In addition, the air entry of compressor 1 is connected with gas-liquid separator 3, and gas-liquid separator adopts a pattern of entering to have more, and while guaranteeing underload, the oil of gas-liquid separator can be back to compressor.
the second oil-out 21 of oil eliminator 2 is connected with the oil equalizing pipe 6 of another or multiple off-premises stations by oil equalizing pipe 6, and oil equalizing pipe 6 is provided with normally closed solenoid valve 9, check valve 7.Like this, adopt all oil of pressure reduction before multimode off-premises station, in uneven oil, pipeline the inside is low-pressure side, can prevent that fluid-tight oil sealing from damaging pipeline.
in addition, oil equalizing pipe 6 is connected by oil equalizing pipe branch road 60 with gas-liquid separator 3, and oil equalizing pipe branch road 60 is provided with normally closed solenoid valve 9.
embodiment bis-:
as shown in Figure 2: embodiment bis-and embodiment mono-are basic identical, difference is: every off-premises station comprises the frequency-changeable compressor 10 being arranged in parallel, an invariable frequency compressor 11, the first oil-out 20 of oil eliminator 2 is connected with the air entry of two compressors by oil return capillary 5, and the oil return capillary 5 that connects invariable frequency compressor 11 is provided with normally open solenoid valve 8.
above-described embodiment is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences that Spirit Essence is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (8)
1. the oil way balance system of a connected unit, it comprises at least one off-premises station, off-premises station described in every comprises many compressors that are arranged in parallel, an oil eliminator and a gas-liquid separator, the exhaust outlet of described compressor is connected with the refrigerant entrance of described oil eliminator, the air entry of described compressor is connected with described gas-liquid separator, it is characterized in that: described oil eliminator offers the first oil-out, the second oil-out, the first described oil-out offer position lower than the position of offering of the second described oil-out, the first described oil-out is connected with the air entry of described compressor, the second described oil-out is connected with another or multiple described off-premises stations.
2. the oil way balance system of a kind of connected unit according to claim 1, it is characterized in that: the second described oil-out is connected with the oil equalizing pipe of another or multiple described off-premises stations by oil equalizing pipe, and described oil equalizing pipe is provided with normally closed solenoid valve, check valve.
3. the oil way balance system of a kind of connected unit according to claim 2, is characterized in that: described oil equalizing pipe is connected by oil equalizing pipe branch road with described gas-liquid separator, and described oil equalizing pipe branch road is provided with normally closed solenoid valve.
4. the oil way balance system of a kind of connected unit according to claim 1, is characterized in that: described compressor is provided with two, and the compressor described in two is frequency-changeable compressor.
5. the oil way balance system of a kind of connected unit according to claim 4, is characterized in that: the first described oil-out is connected with the air entry of described compressor by oil return capillary, and described oil return capillary is provided with normally open solenoid valve.
6. the oil way balance system of a kind of connected unit according to claim 1, is characterized in that: described compressor is provided with two, and the compressor described in is frequency-changeable compressor, and the compressor described in is invariable frequency compressor.
7. the oil way balance system of a kind of connected unit according to claim 6, it is characterized in that: the first described oil-out is connected with the air entry of described compressor by oil return capillary, and the oil return capillary connecting described in described invariable frequency compressor is provided with normally open solenoid valve.
8. the oil way balance system of a kind of connected unit according to claim 1, is characterized in that: the exhaust outlet of described compressor is connected by blast pipe with the refrigerant entrance of described oil eliminator, and described blast pipe is provided with check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310493672.6A CN103528271A (en) | 2013-10-18 | 2013-10-18 | Oil circuit balancing system of frequency-conversion multi-connected unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310493672.6A CN103528271A (en) | 2013-10-18 | 2013-10-18 | Oil circuit balancing system of frequency-conversion multi-connected unit |
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| CN103528271A true CN103528271A (en) | 2014-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310493672.6A Pending CN103528271A (en) | 2013-10-18 | 2013-10-18 | Oil circuit balancing system of frequency-conversion multi-connected unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104633998A (en) * | 2015-02-12 | 2015-05-20 | 三菱电机(广州)压缩机有限公司 | Rotary compressor parallel connection system |
| CN105299979A (en) * | 2015-10-15 | 2016-02-03 | 海信（山东）空调有限公司 | Oil-returning control method and oil-returning device for compressor as well as air conditioner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000161805A (en) * | 1998-11-27 | 2000-06-16 | Daikin Ind Ltd | Refrigerating apparatus |
| CN201122030Y (en) * | 2007-11-17 | 2008-09-24 | 广东美的电器股份有限公司 | Multi-connection type thermal pump air conditioner system |
| CN202692268U (en) * | 2012-08-02 | 2013-01-23 | 珠海格力电器股份有限公司 | Multi-connected machine modularization system |
-
2013
- 2013-10-18 CN CN201310493672.6A patent/CN103528271A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000161805A (en) * | 1998-11-27 | 2000-06-16 | Daikin Ind Ltd | Refrigerating apparatus |
| CN201122030Y (en) * | 2007-11-17 | 2008-09-24 | 广东美的电器股份有限公司 | Multi-connection type thermal pump air conditioner system |
| CN202692268U (en) * | 2012-08-02 | 2013-01-23 | 珠海格力电器股份有限公司 | Multi-connected machine modularization system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104633998A (en) * | 2015-02-12 | 2015-05-20 | 三菱电机(广州)压缩机有限公司 | Rotary compressor parallel connection system |
| CN105299979A (en) * | 2015-10-15 | 2016-02-03 | 海信（山东）空调有限公司 | Oil-returning control method and oil-returning device for compressor as well as air conditioner |
| CN105299979B (en) * | 2015-10-15 | 2017-09-12 | 海信（山东）空调有限公司 | Compressor method for controlling oil return, oil return apparatus and air conditioner |
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Application publication date: 20140122 |