CN103968608A - Air source heat pump unit with parallel double compressors - Google Patents
Air source heat pump unit with parallel double compressors Download PDFInfo
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- CN103968608A CN103968608A CN201310034257.4A CN201310034257A CN103968608A CN 103968608 A CN103968608 A CN 103968608A CN 201310034257 A CN201310034257 A CN 201310034257A CN 103968608 A CN103968608 A CN 103968608A
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- compressor
- oil
- heat pump
- source heat
- pump unit
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Abstract
The invention discloses an air source heat pump unit with parallel double compressors, and relates to the technical field of air conditioners. The air source heat pump unit comprises a condenser, a liquid storage device, a drying filter, a thermal expansion valve and an evaporator which are sequentially connected. The air source heat pump unit is structurally characterized in that an air suction pipe at an outlet of the evaporator is respectively connected to an inlet of a compressor I and an inlet of a compressor II; an oil separator is connected onto a main exhaust pipe of an outlet of the compressor I and an outlet of the compressor II; oil separated from the oil separator returns to the inlet of the compressor II through an oil returning pipe; an oil equalizing pipe is connected between the compressor I and the compressor II; an outlet of the oil separator is connected to an inlet of the condenser to form a circulating refrigeration system; the difference of air suction resistance of the compressor I and air suction resistance of the compressor II is not smaller than 0.3 bar, so that pressure difference exists in oil grooves of the two compressors. According to the air source heat pump unit disclosed by the invention, normal operation of the unit is realized while oil return equalization of the two compressors is ensured. The air source heat pump unit has the characteristics of simple structure, low cost, safety and reliability.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly a kind of net for air-source heat pump units of double-compressor parallel.
Background technology
In air-conditioning market, Multi-compressor parallel air-conditioning unit is more and more, but this unit exist between each compressor can oil return problem, the normal oil return of resolving unit is the key that ensures this unit safety operation.
In prior art, two kinds of modes below normal employing: a kind of mode is to join a set of oil level balancer to every compressor, and then oil eliminator and oil catcher are installed on total air escape pipe, controls the oil mass of every compressor by oil level balancer; Another kind of mode is on air suction main, to add oil return separator, makes all lubricating oil first get back to upstream compressor, and then makes the unnecessary downstream compressor of getting back to by oil equalizing pipe.But above-mentioned two kinds of circuits all come with some shortcomings, first kind of way cost increases more, and second method requires stricter to pipe arrangement, is difficult for promoting.
Summary of the invention
For above-mentioned deficiency of the prior art, the object of this invention is to provide a kind of net for air-source heat pump units of double-compressor parallel.It,, in ensureing two compressor oil return equilibriums, reaches unit and moves normally, has feature simple in structure, cost is low, safe and reliable.
In order to reach foregoing invention object, technical scheme of the present invention realizes as follows:
A net for air-source heat pump units for double-compressor parallel, it comprises the condenser, reservoir, device for drying and filtering, heating power expansion valve and the evaporimeter that connect successively.Its design feature is that the air intake duct at described evaporator outlet place is connected respectively to the entrance of compressor one and compressor two.On the total air escape pipe that compressor one exports with compressor two, be connected oil eliminator, the oil of separating from oil eliminator is back to the entrance of compressor two by oil return pipe.Between compressor one and compressor two, be connected with oil equalizing pipe, what the outlet of oil eliminator was connected to condenser enters interruption-forming cycle refrigeration system.The inspiratory resistance of the inspiratory resistance of compressor one and compressor two is poor >=0.3bar, make to have pressure differential in two compressor oil grooves.
In above-mentioned net for air-source heat pump units, the inspiratory resistance >=0.3bar of the inspiratory resistance-compressor of described compressor, makes to have pressure differential in two compressor oil grooves.
The present invention is owing to having adopted above-mentioned version, and compared with the existing technology, circuit is simple, reliable.As long as make the configuration of two air intake ducts rationally, between two air intake ducts, there is certain pressure reduction and just can realize the balanced oil return of two compressors, whole unit safety reliability service.Have the advantages that machine set system is simple in structure, cost is low, safe and reliable.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Referring to Fig. 1, the present invention includes the condenser 4, reservoir 5, device for drying and filtering 6, heating power expansion valve 7 and the evaporimeter 8 that connect successively.The air intake duct in evaporimeter 8 exits is connected respectively to the entrance of compressor 1 and compressor 22, on the total air escape pipe of compressor 1 and compressor 22 outlets, be connected oil eliminator 3, the oil of separating from oil eliminator 3 is back to the entrance of compressor 22 by oil return pipe 9.Between compressor 1 and compressor 22, be connected with oil equalizing pipe 10, what the outlet of oil eliminator 3 was connected to condenser 4 enters interruption-forming cycle refrigeration system.The inspiratory resistance of the inspiratory resistance of compressor 1 and compressor 22 is poor >=0.3bar, make to have pressure differential in two compressor oil grooves.
When the present invention works, the lubricating oil separation that the oil eliminator 3 on total air escape pipe is discharged two compressors out, is got back to by oil return pipe in the air intake duct of compressor 22.Because the air intake duct of compressor 1 is longer, and the air intake duct of compressor 22 is shorter, forms the resistance difference between two compressors, thereby causes the oil groove pressure of compressor 1 to be less than the oil groove pressure of compressor 22.Therefore,, in the time of compressor 22 interior Chuck Steak, oil flows to compressor 1 from compressor 22, thereby has ensured the balance of oil mass between two compressors.
Claims (1)
1. the net for air-source heat pump units of a double-compressor parallel, it comprises the condenser (4) connecting successively, reservoir (5), device for drying and filtering (6), heating power expansion valve (7) and evaporimeter (8), it is characterized in that, the air intake duct in described evaporimeter (8) exit is connected respectively to the entrance of compressor one (1) and compressor two (2), on the total air escape pipe of compressor one (1) and compressor two (2) outlets, be connected oil eliminator (3), the oil of separating from oil eliminator (3) is back to the entrance of compressor two (2) by oil return pipe (9), between compressor one (1) and compressor two (2), be connected with oil equalizing pipe (10), what the outlet of oil eliminator (3) was connected to condenser (4) enters interruption-forming cycle refrigeration system, the inspiratory resistance of the inspiratory resistance of compressor one (1) and compressor two (2) is poor >=0.3bar, make to have pressure differential in two compressor oil grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310034257.4A CN103968608B (en) | 2013-01-30 | 2013-01-30 | A kind of net for air-source heat pump units of double-compressor parallel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310034257.4A CN103968608B (en) | 2013-01-30 | 2013-01-30 | A kind of net for air-source heat pump units of double-compressor parallel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103968608A true CN103968608A (en) | 2014-08-06 |
| CN103968608B CN103968608B (en) | 2016-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310034257.4A Active CN103968608B (en) | 2013-01-30 | 2013-01-30 | A kind of net for air-source heat pump units of double-compressor parallel |
Country Status (1)
| Country | Link |
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| CN (1) | CN103968608B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5214928A (en) * | 1991-04-02 | 1993-06-01 | Omega Enterprises, Inc. | Refrigeration apparatus and methods |
| CN102338505A (en) * | 2011-09-30 | 2012-02-01 | Tcl空调器（武汉）有限公司 | Oil return flow path for multi-connected compressors and control method of oil return flow path |
| CN202158692U (en) * | 2011-06-28 | 2012-03-07 | 青岛海信日立空调系统有限公司 | Oil supply mechanism of multi-connected air-conditioning system |
| CN102563976A (en) * | 2012-02-01 | 2012-07-11 | 美的集团有限公司 | Oil return system of compressor |
| CN203132207U (en) * | 2013-01-30 | 2013-08-14 | 同方人工环境有限公司 | Dual parallel compressor air source heat pump unit |
-
2013
- 2013-01-30 CN CN201310034257.4A patent/CN103968608B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5214928A (en) * | 1991-04-02 | 1993-06-01 | Omega Enterprises, Inc. | Refrigeration apparatus and methods |
| CN202158692U (en) * | 2011-06-28 | 2012-03-07 | 青岛海信日立空调系统有限公司 | Oil supply mechanism of multi-connected air-conditioning system |
| CN102338505A (en) * | 2011-09-30 | 2012-02-01 | Tcl空调器（武汉）有限公司 | Oil return flow path for multi-connected compressors and control method of oil return flow path |
| CN102563976A (en) * | 2012-02-01 | 2012-07-11 | 美的集团有限公司 | Oil return system of compressor |
| CN203132207U (en) * | 2013-01-30 | 2013-08-14 | 同方人工环境有限公司 | Dual parallel compressor air source heat pump unit |
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| Publication number | Publication date |
|---|---|
| CN103968608B (en) | 2016-04-13 |
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