CN202350391U - Oil return system of efficient heat pump unit - Google Patents
Oil return system of efficient heat pump unit Download PDFInfo
- Publication number
- CN202350391U CN202350391U CN2011205076691U CN201120507669U CN202350391U CN 202350391 U CN202350391 U CN 202350391U CN 2011205076691 U CN2011205076691 U CN 2011205076691U CN 201120507669 U CN201120507669 U CN 201120507669U CN 202350391 U CN202350391 U CN 202350391U
- Authority
- CN
- China
- Prior art keywords
- oil return
- heat pump
- oil
- pump unit
- compressor
- 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.)
- Expired - Fee Related
Links
- 239000003921 oil Substances 0.000 claims abstract description 70
- 239000011552 falling film Substances 0.000 claims abstract description 21
- 239000010687 lubricating oil Substances 0.000 claims abstract description 11
- 239000003507 refrigerant Substances 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000003208 petroleum Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000010725 compressor oil Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000037351 starvation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The utility model relates to an oil return system of an efficient heat pump unit, which comprises a scroll compressor, a shell-and-tube condenser (1) and a dripping falling-film evaporator (4). The scroll compressor is connected between the shell-and-tube condenser (1) and the dripping falling-film evaporator (4). The oil return system of the efficient heat pump unit is characterized in that two oil return lines are arranged between the shell-and-tube condenser (1) and the scroll compressor, a first oil return line is that lubricating oil separated from the shell-and-tube condenser (1) enters an air suction pipe of the compressor directly through an oil return pipeline, and the second oil return line is that lubricating oil of the dripping falling-film evaporator (4) is injected by high-pressure refrigerant vapor at an outlet of the scroll compressor and sent to the air suction pipe of the compressor through an oil conveying pipe. Due to the two oil return lines, the problem that the scroll compressor in the oil return system is unsmooth in oil return is solved, and the fact that a heat pump can always run safely and stably can be guaranteed.
Description
Technical field
The utility model relates to a kind of oil return system of high-efficiency heat pump unit.
Background technology
There is the problem of oil return difficulty in flooded evaporator, and prior art such as a kind of full-liquid type water ground source injection oil return system (201120033295.4) have proposed the injection oil returning method, adopts the low pressure oil of the hydraulic oil injection evaporimeter of condenser.
The high-efficiency heat pump unit has adopted many screw compressor parallel connection trickle falling film evaporimeters; This oil return method is in a period of time after the start of this source pump; Oil-collecting in the evaporimeter appears and the phenomenon of compressor oil starvation; Heat pump can not normally be moved, pass through longer a period of time the oil-collecting of evaporimeter is got back in the compressor.
Because oil return is not smooth, cause the heat pump beginning can not safe and stable operation, reduced the operational efficiency of source pump, the service life of having reduced compressor.
Summary of the invention
The utility model has designed a kind of oil return system of high-efficiency heat pump unit; The technical problem of its solution is that existing trickle falling film evaporimeter exists the oil return difficulty; Cause heat pump beginning can not safe and stable operation, reduced the operational efficiency of source pump, the service life of having reduced compressor.
In order to solve the technical problem of above-mentioned existence, the utility model has adopted following scheme:
A kind of oil return system of high-efficiency heat pump unit; Comprise screw compressor, shell and tube condenser (1) and trickle falling film evaporimeter (4); Said screw compressor is connected in said shell and tube condenser (1) and said trickle falling film evaporimeter (4); Be provided with two oil return circuits between said shell and tube condenser (1) and the said screw compressor, wherein the first oil return circuit is that the lubricating oil of separating in the shell and tube condenser (1) directly passes through the air intake duct that return line gets into compressor; The second oil return circuit is the lubricating oil of the said trickle falling film evaporimeter of the high-pressure refrigerant vapor injection of compressor outlet (4), delivers to compressor suction duct through petroleum pipeline.
Further, also be provided with first magnetic valve (5) and first-hand valve (6) on the first oil return circuit.
Further, the second oil return circuit also is provided with injector (9), and another output port of said trickle falling film evaporimeter (4) is connected with said injector (9).
Further, said condenser is provided with built-in oil eliminator in (1), and the lubricating oil in the said second oil return circuit is from built-in oil eliminator.
Further, be provided with connecting pipeline between said injector (9) and the screw compressor, said connecting pipeline is provided with second-hand's valve (7) and second magnetic valve (8).
Further, said screw compressor is many, and many screw compressors are connected in parallel between said condenser (1) and the said trickle falling film evaporimeter (4).
The oil return system of this high-efficiency heat pump unit is compared with traditional oil return system, has following beneficial effect:
(1) the utility model has solved the not smooth problem of native system mesoscale eddies compressor oil return owing to be provided with two oil return circuits, can guarantee that heat pump all the time can safe and stable operation.
(2) the utility model is owing to adopted the first oil return circuit and the oil return simultaneously of the second oil return circuit in the running; The second oil return circuit is closed after operation a period of time; Reduced cold-producing medium energy loss in the oil return process; Improve the operational efficiency of source pump, prolonged the service life of compressor.
Description of drawings
Fig. 1 is that the parts of the oil return system of the utility model high-efficiency heat pump unit connect sketch map.
Description of reference numerals:
1, shell and tube condenser; 2, device for drying and filtering; 3, expansion valve; 4, trickle falling film evaporimeter; 5, first magnetic valve; 6, first-hand valve; 7, second-hand's valve; 8, second magnetic valve; 9, injector; 10, liquid-sighting glass; 11, first screw compressor; 12, second screw compressor.
The specific embodiment
Below in conjunction with Fig. 1, the utility model is further specified:
The operation principle of the oil return system of this high-efficiency heat pump unit is following:
The oil return system of this high-efficiency heat pump unit is provided with two oil return circuits, and wherein the first oil return circuit is that the lubricating oil of separating in the shell and tube condenser 1 directly passes through the air intake duct that return line gets into compressor.The second oil return circuit is the lubricating oil of the high-pressure refrigerant vapor injection trickle falling film evaporimeter 4 of compressor outlet, delivers to compressor suction duct through petroleum pipeline.
Specifically, shell and tube condenser 1 is provided with two return lines with first screw compressor 11 with the parallelly connected common port of second screw compressor 12, wherein also is provided with first magnetic valve 5 and first-hand valve 6 on the first oil return circuit.This first oil return circuit is condenser oil return path, and built-in oily formula separator is set in the condenser, and purpose is that the lubricating oil that carries in the compressor air-discharging is in time separated, and the lubricants capacity that gets into trickle falling film evaporimeter 4 is reduced.
The second oil return circuit is provided with injector 9, and an output port of trickle falling film evaporimeter 4 is connected with injector 9.Oil return in the second oil return circuit in the trickle falling film evaporimeter 4 accounts for the very little part of total oil return, and intermittent control is taked in this oil return path, is beneficial to the efficient operation of system.
Concrete method for using is that two kinds of oil return circuits move simultaneously in initial 5 minutes of start, and after 5 minutes, when the long-pending oil of evaporimeter was got back to compressor fully, injection oil return circuit was closed, and source pump adopts the condenser oil return.
Combine accompanying drawing that the utility model has been carried out exemplary description above; Obviously the realization of the utility model does not receive the restriction of aforesaid way; As long as adopted method design of the utility model and the various improvement that technical scheme is carried out; Or the design of the utility model and technical scheme are directly applied to other occasion without improving, all in the protection domain of the utility model.
Claims (7)
1. the oil return system of a high-efficiency heat pump unit; Comprise screw compressor, shell and tube condenser (1) and trickle falling film evaporimeter (4); Said screw compressor is connected in said shell and tube condenser (1) and said trickle falling film evaporimeter (4); It is characterized in that: be provided with two oil return circuits between said shell and tube condenser (1) and the said screw compressor, wherein the first oil return circuit is that the lubricating oil of separating in the shell and tube condenser (1) directly passes through the air intake duct that return line gets into compressor; The second oil return circuit is the lubricating oil of the said trickle falling film evaporimeter of high-pressure refrigerant vapor injection (4) of screw compressor outlet, delivers to compressor suction duct through petroleum pipeline.
2. according to the oil return system of the said high-efficiency heat pump unit of claim 1, it is characterized in that: also be provided with first magnetic valve (5) and first-hand valve (6) on the first oil return circuit.
3. according to the oil return system of claim 1 or 2 said high-efficiency heat pump units, it is characterized in that: the second oil return circuit also is provided with injector (9), and another output port of said trickle falling film evaporimeter (4) is connected with said injector (9).
4. according to the oil return system of the said high-efficiency heat pump unit of claim 3, it is characterized in that: said condenser is provided with built-in oil eliminator in (1), and the lubricating oil in the said second oil return circuit is from built-in oil eliminator.
5. according to the oil return system of the said high-efficiency heat pump unit of claim 4, it is characterized in that: be provided with connecting pipeline between said injector (9) and the screw compressor, said connecting pipeline is provided with second-hand's valve (7) and second magnetic valve (8).
6. according to the oil return system of claim 1,2,4 or 5 said high-efficiency heat pump units, it is characterized in that: said screw compressor is many, and many screw compressors are connected in parallel between said condenser (1) and the said trickle falling film evaporimeter (4).
7. according to the oil return system of the said high-efficiency heat pump unit of claim 3, it is characterized in that: said screw compressor is many, and many screw compressors are connected in parallel between said condenser (1) and the said trickle falling film evaporimeter (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205076691U CN202350391U (en) | 2011-12-08 | 2011-12-08 | Oil return system of efficient heat pump unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205076691U CN202350391U (en) | 2011-12-08 | 2011-12-08 | Oil return system of efficient heat pump unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202350391U true CN202350391U (en) | 2012-07-25 |
Family
ID=46539390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205076691U Expired - Fee Related CN202350391U (en) | 2011-12-08 | 2011-12-08 | Oil return system of efficient heat pump unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202350391U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062948A (en) * | 2012-12-29 | 2013-04-24 | 宁波奥克斯电气有限公司 | Dual parallel compressor screw water chilling unit |
| CN104676934A (en) * | 2015-03-10 | 2015-06-03 | 南京冷德节能科技有限公司 | Double-stage falling film screw rod cold water/heat pump unit |
| CN106121970A (en) * | 2016-08-16 | 2016-11-16 | 萨震压缩机（上海）有限公司 | The adjustable air compressor machine of distributive value |
-
2011
- 2011-12-08 CN CN2011205076691U patent/CN202350391U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062948A (en) * | 2012-12-29 | 2013-04-24 | 宁波奥克斯电气有限公司 | Dual parallel compressor screw water chilling unit |
| CN103062948B (en) * | 2012-12-29 | 2015-04-08 | 宁波奥克斯电气有限公司 | Dual parallel compressor screw water chilling unit |
| CN104676934A (en) * | 2015-03-10 | 2015-06-03 | 南京冷德节能科技有限公司 | Double-stage falling film screw rod cold water/heat pump unit |
| CN106121970A (en) * | 2016-08-16 | 2016-11-16 | 萨震压缩机（上海）有限公司 | The adjustable air compressor machine of distributive value |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20191208 |