CN202350391U - Oil return system of efficient heat pump unit - Google Patents

Oil return system of efficient heat pump unit Download PDF

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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
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CN
China
Prior art keywords
oil return
heat pump
oil
compressor
pump unit
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
Application number
CN2011205076691U
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Chinese (zh)
Inventor
高建岭
王晓纯
赵玉清
白玉星
李月恒
铁军
张在亮
刘通祥
张虎占
白春明
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North China University of Technology
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North China University of Technology
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Filing date
Publication date
Application filed by North China University of Technology filed Critical North China University of Technology
Priority to CN2011205076691U priority Critical patent/CN202350391U/en
Application granted granted Critical
Publication of CN202350391U publication Critical patent/CN202350391U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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

A kind of oil return system of high-efficiency heat pump unit
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).
CN2011205076691U 2011-12-08 2011-12-08 Oil return system of efficient heat pump unit Expired - Fee Related CN202350391U (en)

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

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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)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120725

Termination date: 20191208

CF01 Termination of patent right due to non-payment of annual fee