CN204830554U - Oil return efficient screw rod is cold, hot water unit - Google Patents
Oil return efficient screw rod is cold, hot water unit Download PDFInfo
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- CN204830554U CN204830554U CN201520487726.2U CN201520487726U CN204830554U CN 204830554 U CN204830554 U CN 204830554U CN 201520487726 U CN201520487726 U CN 201520487726U CN 204830554 U CN204830554 U CN 204830554U
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Abstract
The utility model relates to an oil return efficient screw rod is cold, hot water unit, including helical -lobe compressor, helical -lobe compressor's induction port passes through tube coupling to evaporimeter, and its gas vent is connected to the condenser through the pipeline behind external secondary oil separator, this secondary oil separator still is connected to behind first oil return solenoid valve through the pipeline helical -lobe compressor's induction port, the condenser still is connected to behind second oil return solenoid valve and jet pump through the pipeline helical -lobe compressor's induction port, this jet pump still simultaneously is connected to the evaporimeter through the pipeline behind third oil return solenoid valve, be equipped with two oil level switches in the helical -lobe compressor. The utility model relates to a rationally, simple structure, oil return process in the control unit return circuit that can be high -efficient and accurate, the very big oil return situation of improving helical -lobe compressor promotes the operating efficiency of unit to but increase of service life.
Description
Technical field
The utility model relates to a kind of air-conditioning system, especially a kind of screw rod hot water or cold water unit with high-efficiency oil-return ability, a kind of oil return efficient screw rod hot water or cold water unit specifically.
Background technology
At present, along with announcement and the execution of national air-conditioning products energy conservation standard, the products such as screw rod hot water or cold water unit obtain applying more and more widely.But the problems such as this series products ubiquitous oil return efficiency is low, often cause that the pressure of inspiration(Pi) of compressor air suction end reduces, refrigerating capacity reduce, power increases and the adverse consequences such as helical-lobe compressor band liquid, and then have influence on operational efficiency and the service life of unit.Therefore, need to design a kind of screw rod hot water or cold water unit, can effectively improve oil return efficiency, guarantee that unit normally runs and improves unit operation efficiency and increase the service life.
Utility model content
The purpose of this utility model is for the deficiencies in the prior art; the efficient screw rod hot water or cold water of a kind of oil return is provided unit; effectively can improve the oil return efficiency of helical-lobe compressor in unit, guarantee that unit normally runs and improves unit operation efficiency and increase the service life.
The technical solution of the utility model is:
A kind of oil return efficient screw rod hot water or cold water unit, comprise helical-lobe compressor, the air entry of described helical-lobe compressor is connected to evaporimeter by pipeline, and its exhaust outlet is connected to condenser by pipeline after external secondary oil separator; This secondary oil separator is also connected to the air entry of described helical-lobe compressor after the first oil return solenoid valve by pipeline; Described condenser is also connected to the air entry of described helical-lobe compressor after the second oil return solenoid valve and jet pump by pipeline; This jet pump is also connected to evaporimeter by pipeline simultaneously after the 3rd oil return solenoid valve; Two oil level switch is provided with in described helical-lobe compressor.
Further, the pipeline between described secondary oil separator and the first oil return solenoid valve is provided with the first stop valve; And pipeline between this first oil return solenoid valve and helical-lobe compressor air entry is also provided with the first liquid-sighting glass and the second stop valve.
Further, the pipeline between described jet pump and described helical-lobe compressor air entry is also provided with the second liquid-sighting glass and the 3rd stop valve.
Further, the pipeline between described jet pump and evaporimeter is also provided with the 4th stop valve.
The beneficial effects of the utility model:
The utility model is reasonable in design, and structure is simple, efficiently and accurately can control the oil return process in unit loop, improve the oil return situation of helical-lobe compressor greatly, promotes the operational efficiency of unit, and can increase the service life.
Accompanying drawing explanation
Fig. 1 is connection diagram of the present utility model.
Fig. 2 is the structural representation of two oil level switch of the utility model.
Wherein: 1-evaporimeter; 2-helical-lobe compressor; 3-secondary oil separator; 4-condenser; 5-second oil return solenoid valve; 6-first stop valve; 7-first oil return solenoid valve; 8-first liquid-sighting glass; 9-second stop valve; The two oil level switch of 10-; 11-the 3rd stop valve; 12-second liquid-sighting glass; 13-jet pump; 14-the 3rd oil return solenoid valve; 15-the 4th stop valve.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is further described.
As illustrated in fig. 1 and 2.
A kind of oil return efficient screw rod hot water or cold water unit, comprises helical-lobe compressor 2.The air entry of described helical-lobe compressor 2 is connected to evaporimeter 1 by pipeline, and its exhaust outlet is connected to condenser 4 by pipeline after external secondary oil separator 3.This secondary oil separator 3 is also connected to the air entry of described helical-lobe compressor 2 after the first oil return solenoid valve 7 by pipeline.Described condenser 4 is also connected to the air entry of described helical-lobe compressor 2 after the second oil return solenoid valve 5 and jet pump 13 by pipeline.This jet pump 13 is also connected to evaporimeter 1 by pipeline simultaneously after the 3rd oil return solenoid valve 14.Two oil level switch 10 is provided with in described helical-lobe compressor 2.This pair of oil level switch 10 comprises high oil level control point H and low oil level control point L, and is connected with generator set controller.This pair of oil level switch 10 can be float-ball type oil level switch, or photo-electric oil level switch.
Further, pipeline between described secondary oil separator 3 and the first oil return solenoid valve 7 is also provided with the first stop valve 6, and pipeline between this first oil return solenoid valve 7 and helical-lobe compressor air entry is provided with the first liquid-sighting glass 8 and the second stop valve 9 successively, when being convenient to test pipeline or keep in repair, by closing stop valve, prevent the cold-producing medium in pipeline from flowing out.Meanwhile, by liquid-sighting glass, the oil return situation in this pipeline is observed.
Further, the pipeline between described jet pump 13 and described helical-lobe compressor 2 air entry is also provided with the second liquid-sighting glass 12 and the 3rd stop valve 11, is convenient to observe, test and maintenance.
Further, the pipeline between described jet pump 13 and evaporimeter 1 is also provided with the 4th stop valve 14, is convenient to test and maintenance.
Running of the present utility model is:
When unit normally runs, first oil return solenoid valve 7 is opened, and making the second oil return solenoid valve 5 and the 3rd oil return solenoid valve 14 be in closed condition, helical-lobe compressor 2 utilizes the oil of built-in oil-tank, from the air-breathing oil return of evaporimeter 1 and carry out fuel feeding to corresponding component from the oil return of secondary oil separator 3.When generator set controller detects that the signal of the high oil level control point H of two oil level switch 10 disconnects, unit is by time delay or open the second oil return solenoid valve 5 and the 3rd oil return solenoid valve 14 in time, utilize jet pump 13 to pump from condenser 4, auxiliary repairing is carried out to helical-lobe compressor 2.Along with the increase of repairing amount, when the high oil level control point H signal in two oil level switch 10 closes, unit is by time delay or close the second oil return solenoid valve 5 and the 3rd oil return solenoid valve 14 in time, and auxiliary repairing will stop.If oil circuit breaks down cause auxiliary repairing failure, then helical-lobe compressor 2 meeting continuous service, until the low oil level control point L in two oil level switch 10 disconnects, compressor will report oil starvation fault and protectiveness is shut down.So, the oil return control mode combined with auxiliary repairing by normal fuel injection, can make the reliability of unit and operational efficiency be greatly improved.
The utility model does not relate to the part prior art that maybe can adopt all same as the prior art and is realized.
Claims (4)
1. an oil return efficient screw rod hot water or cold water unit, comprises helical-lobe compressor, and it is characterized in that the air entry of described helical-lobe compressor is connected to evaporimeter by pipeline, its exhaust outlet is connected to condenser by pipeline after external secondary oil separator; This secondary oil separator is also connected to the air entry of described helical-lobe compressor after the first oil return solenoid valve by pipeline; Described condenser is also connected to the air entry of described helical-lobe compressor after the second oil return solenoid valve and jet pump by pipeline; This jet pump is also connected to evaporimeter by pipeline simultaneously after the 3rd oil return solenoid valve; Two oil level switch is provided with in described helical-lobe compressor.
2. oil return according to claim 1 efficient screw rod hot water or cold water unit, is characterized in that the pipeline between described secondary oil separator and the first oil return solenoid valve is provided with the first stop valve; And pipeline between this first oil return solenoid valve and helical-lobe compressor air entry is also provided with the first liquid-sighting glass and the second stop valve.
3. oil return according to claim 1 efficient screw rod hot water or cold water unit, is characterized in that the pipeline between described jet pump and described helical-lobe compressor air entry being also provided with the second liquid-sighting glass and the 3rd stop valve.
4. oil return according to claim 1 efficient screw rod hot water or cold water unit, is characterized in that the pipeline between described jet pump and evaporimeter being also provided with the 4th stop valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520487726.2U CN204830554U (en) | 2015-07-08 | 2015-07-08 | Oil return efficient screw rod is cold, hot water unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520487726.2U CN204830554U (en) | 2015-07-08 | 2015-07-08 | Oil return efficient screw rod is cold, hot water unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204830554U true CN204830554U (en) | 2015-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520487726.2U Active CN204830554U (en) | 2015-07-08 | 2015-07-08 | Oil return efficient screw rod is cold, hot water unit |
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| Country | Link |
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| CN (1) | CN204830554U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662815A (en) * | 2018-06-04 | 2018-10-16 | 珠海格力电器股份有限公司 | Oil return oil way system of refrigerating unit, refrigerating unit and oil way switching method |
-
2015
- 2015-07-08 CN CN201520487726.2U patent/CN204830554U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662815A (en) * | 2018-06-04 | 2018-10-16 | 珠海格力电器股份有限公司 | Oil return oil way system of refrigerating unit, refrigerating unit and oil way switching method |
| CN108662815B (en) * | 2018-06-04 | 2023-07-04 | 珠海格力电器股份有限公司 | Oil return way system of refrigerating unit, refrigerating unit and oil way switching method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |