阅读说明：本技术 引射回油效果可靠的引射回油取液结构及空调系统 (The reliable injection oil return of injection oil return effect takes liquid structure and air-conditioning system ) 是由 刘华 张治平 华超 周宇 钟瑞兴 周堂 陈治贵 何俊豪 于 2019-09-30 设计创作，主要内容包括：本发明公开了引射回油效果可靠的引射回油取液结构及空调系统。所述的引射回油取液结构,包括内部设有管道的蒸发器筒体、设于蒸发器筒体上至少二个不同水平位置的取液口,将取液口与引射器连接的连通管。取液口与连通管的连通处均低于最低位置的取液口的水平位置。本发明在蒸发器筒体上设有多个不同高度的取液口,取液口与连通管的连通处,均低于最低位置的取液口的水平位置,使得引射管路中自动产生液封,避免引射取液吸空。不仅解决因不同工况液面变化引射回油取不到液的问题,而且引射回油的效果显著,有效降低制冷剂中的润滑油含量,保证制冷剂性能,提高制冷剂使用寿命,提高了机组可靠性。(The invention discloses the reliable injection oil returns of injection oil return effect to take liquid structure and air-conditioning system.The injection oil return takes liquid structure, including the internal evaporator tube for being equipped with pipeline, on evaporator tube at least two different level positions liquid taking port, the communicating pipe that liquid taking port is connect with injector.The connectivity part of liquid taking port and communicating pipe are below the horizontal position of the liquid taking port of extreme lower position.The present invention is equipped with the liquid taking port of multiple and different height on evaporator tube, and the connectivity part of liquid taking port and communicating pipe is below the horizontal position of the liquid taking port of extreme lower position, so that automatically generating fluid-tight in injection pipeline, avoids injection that liquid is taken to be emptied.It not only solves the problems, such as to take the lubrication oil content being effectively reduced less than liquid, but also the significant effect of injection oil return in refrigerant because of different operating condition fluid change injection oil returns, guarantees refrigerant performance, improve refrigerant service life, improve unit reliability.)

1. a kind of injection oil return takes liquid structure, including the internal evaporator tube for being equipped with pipeline, be set to the evaporator tube up to The liquid taking port of few two different level positions, the communicating pipe that the liquid taking port is connect with injector, which is characterized in that described Liquid taking port and the communicating pipe connectivity part be below extreme lower position liquid taking port horizontal position.

2. injection oil return as described in claim 1 takes liquid structure, which is characterized in that the liquid taking port is three.

3. injection oil return as claimed in claim 2 takes liquid structure, which is characterized in that the height of three liquid taking ports is pressed respectively According to 30%, 50%, 70% setting of heat exchange pipeline height set in the evaporator tube.

4. injection oil return as described in claim 1 takes liquid structure, which is characterized in that the outlet conduit court of the liquid taking port divides into It sets.

5. injection oil return as described in claim 1 takes liquid structure, which is characterized in that the communicating pipe lower end and the liquid taking port The connecting pipe of connection is one section of pipeline being laterally arranged.

6. injection oil return as described in claim 1 takes liquid structure, which is characterized in that the injector is set there are three port, Respectively it is connected to the input end of high pressure refrigerant gas, the outlet end of connection fuel tank or compressor air suction mouth low-pressure end and the company The leading-in end of siphunculus connection.

7. a kind of air-conditioning system, which is characterized in that have as injection oil return as claimed in any one of claims 1 to 6 takes liquid structure.

Technical field

The present invention relates to refrigeration technology fields, more particularly to one kind based on different operating condition fluid changes can avoid that liquid is taken to inhale Empty injection oil return takes liquid structure, the air-conditioning system with the structure.

Background technique

In the operational process of water cooler, bearing and speed increasing gear engagement etc. friction can generate a large amount of heat, It needs to be lubricated by lubricating oil and takes away heat using lubrication oil circulation.During this, due to the sealing of sealing device Efficiency, fraction lubricating oil can leak into coolant system.In addition, (such as oil pump stirs for mechanical movement when centrifugal compressor works Liquid, rotor motion, gear gear motion etc.) and the high pressure gas of sealing gland constantly promote compressor internal gas pressure, need to pass through The inside and outside portion of the fabric connectivities compressor such as connecting tube, to balance air pressure inside.But when internal refrigeration storage agent gas passes through connecting tube, meeting Gaseous state lubricating oil is carried, causes lubricating oil that can flow to outside compressor, that is, " running oil " phenomenon occurs.On the one hand " running oil " phenomenon is led Unit absorbing gas belt liquid is caused, impeller life is damaged；On the other hand, lubricating oil liquid level is reduced, moisten the parts such as bearing cannot sufficiently It is sliding, unstable wear.The lubricating oil leaked into coolant system therefore, it is necessary to carry out recycling.It is tested, finds the lubricating oil of leakage Major part can swim in the upper layer of the refrigerant liquid level of evaporator, therefore to the lubricating oil in recycling coolant system, it is necessary to will The most liquid level of oil content (evaporator refrigerant upper epidermis), which takes out, carries out separating-purifying, and leads back fuel tank, follows lubricating oil Ring utilizes.

As shown in Figure 1, lubricating oil in conventional recycling coolant system takes liquid mode, be opened on evaporator tube 01 it is several The liquid taking port of a high and low position, e.g., 02 03 04.Then it carries out injection oil return box by injector 05 or returns compressor to carry out Secondary injection oil return box again after purification.But in reality of work, 06 height of liquid level in evaporator is not fixed and invariable, but Liquid level can be different and just different according to the operating condition of unit.After liquid level 06 is lower than liquid taking port, injector 05 takes liquid will It is emptied, that is, takes less than liquid, injection oil return is caused to fail, set in Fig. 1 there are three liquid taking port (liquid taking port is generally at least arranged), When liquid level 06 floods uppermost liquid taking port 02, which can normally take liquid；When liquid level 06 takes liquid lower than uppermost When mouth 02, this takes hydraulic fluid port to take less than liquid, and injector 05 is caused to be emptied, and injection oil return is caused to fail.

Therefore, how to overcome the injection oil return effect for taking liquid structure of the injection recycling lubricating oil in existing coolant system can It is industry urgent problem to be solved by the lower defect of property.

Summary of the invention

The present invention in order to solve the technical problem that existing injection oil return takes the injection oil return effect reliability of liquid structure lower, There is provided that a kind of structure is simple, injection oil return of injection oil return effect reliability takes liquid structure, the air-conditioning system with the structure.This The injection oil return that invention proposes takes liquid structure that can be changed according to the height of liquid level in evaporator when different operating conditions, effectively avoids drawing Emitter takes the defect that liquid is emptied, and takes liquid effect so as to improve injection oil return.

A kind of injection oil return proposed by the present invention takes liquid structure, including the internal evaporator tube for being equipped with pipeline, is set to and is somebody's turn to do The liquid taking port of at least two different level positions on evaporator tube, the communicating pipe that the liquid taking port is connect with injector. The connectivity part of the liquid taking port and the communicating pipe is below the horizontal position of the liquid taking port of extreme lower position.

Preferably, the liquid taking port is three.

Preferably, the height of three liquid taking ports is respectively according to heat exchange pipeline height set in the evaporator tube 30%, 50%, 70% setting.

Preferably, the outlet conduit of the liquid taking port is arranged downward.

Preferably, the communicating pipe upper connecting pipe connecting with the liquid taking port is one section of pipeline being laterally arranged.

Preferably, the injector is set there are three port, and the respectively input end of connection high pressure refrigerant gas, connection is oily The outlet end of case or compressor air suction mouth low-pressure end, the leading-in end being connect with the communicating pipe.

The invention also provides a kind of air-conditioning systems that liquid structure is taken with the injection oil return.

The present invention is a kind of based on different operating condition fluid changes and the injection oil return that can avoid that liquid is taken to be emptied takes liquid structure, The liquid taking port of multiple and different height is equipped on evaporator tube, liquid taking port extends the connectivity part with the communicating pipe downward, Horizontal position lower than the liquid taking port of extreme lower position avoids injection that liquid is taken to inhale so that automatically generating fluid-tight in injection pipeline It is empty.It not only solves the problems, such as to take because of different operating condition fluid change injection oil returns less than liquid, but also the significant effect of injection oil return, have Effect reduces the lubrication oil content in refrigerant, guarantees refrigerant performance, improves refrigerant service life, it is reliable to improve unit Property.

Detailed description of the invention

Fig. 1 is the schematic diagram that existing injection oil return takes liquid structure；

Fig. 2 is the schematic diagram that injection oil return of the present invention takes liquid structure.

Wherein, 1-evaporator tube；2, the liquid taking port of 3,4-three different high and low positions；5-connecting pipes；6-even Siphunculus；7-injectors；Refrigerant liquid level in 8-evaporator tubes；The leading-in end of 9-injectors；10-connection fuel tanks or pressure The outlet end of contracting machine air entry low-pressure end；The input end of 11-high pressure refrigerant gas；Set heat exchange pipeline in H-evaporator tube Height.

Specific embodiment

The present invention will be described in detail with reference to the accompanying drawings and examples.

As shown in Fig. 2, being the embodiment that a kind of injection oil return proposed by the present invention takes liquid structure.The injection oil return takes liquid knot Structure includes evaporator tube 1, and heat exchange pipeline inside evaporator tube 1 is set on evaporator tube 1 at least two not The liquid taking port of same level position, the communicating pipe 6 that liquid taking port is connect with injector 7.And the connection of each liquid taking port and communicating pipe 6 Place is below the horizontal position of the liquid taking port of extreme lower position.

As shown in Fig. 2, in the present embodiment, equipped with different three liquid taking ports 2,3,4 of high and low position.The height of three liquid taking ports Degree is respectively according to 70%, 50%, 30% setting of heat exchange pipeline height H set in evaporator tube 1, the i.e. liquid taking port 2 of extreme higher position Height be the 70% of heat exchange pipeline height H, it is 50% that the height of the liquid taking port 3 in middle position is heat exchange pipeline height H, minimum The height of the liquid taking port 4 of position is the 30% of heat exchange pipeline height H.According to different needs, it can choose multiple liquid taking ports and not Same spacing, liquid taking port are arranged along the height H that heat exchange pipeline is laid in hierarchic structure.It can be by three liquid taking ports 2,3,4 Outlet conduit be arranged downward, and the connecting pipe 5 being laterally arranged with 6 lower end of communicating pipe is connect, so that the position of the connecting pipe 5 Set low the minimum liquid taking port 4 in the position in the liquid taking port.Certainly, it achieves the object of the present invention, as long as guaranteeing each take Junction A, B, C of liquid mouth 2,3,4 and connecting pipe 5 are entirely below the liquid taking port 4 of extreme lower position.Injector 7 is equipped with three The input end 11 for the high pressure refrigerant gas that a port, respectively connection exhaust outlet of compressor are drawn, to provide injection power； The outlet end 10 of connection fuel tank or compressor air suction mouth low-pressure end, the leading-in end 9 being connect with 6 upper end of communicating pipe.Due to respectively taking liquid The outlet conduit of mouth extends downward, enables and flows into and be full of position by the gravity of itself by the liquid of liquid taking port lower than most The connecting pipe 5 of low liquid taking port 4 being laterally arranged so that form fluid-tight in the outlet conduit of each liquid taking port, thus avoid because It is refrigerant liquid level 8 in evaporator tube 1 lower than after one of liquid taking port, causes injector that liquid is taken to be emptied, and then take less than liquid, Injection oil return is caused to fail.

Refrigeration unit operates under different operating conditions, and 8 height of refrigerant liquid level in evaporator tube 1 is different.See Fig. 2 institute Show that implementation column, fluid change will appear following several operating conditions, operating condition one: liquid level is located at 2 or more the liquid taking port of extreme higher position；Operating condition Two: liquid level is located between extreme higher position liquid taking port 2 and intermediate liquid taking port 3；Operating condition three: liquid level is located at intermediate liquid taking port 3 and minimum Between position liquid taking port 4.Special operation condition: liquid level is located at extreme lower position liquid taking port 4 hereinafter, this is because injector oil return is failed Afterwards, lubricating oil just oil leak not oil return, the oil of such bearing lubrication system will be fewer and fewer, causes oil pressure difference too low.When being System sensor detect that oil pressure difference is too low, unit will alarm and protection shut down, prevent bearing from there is no sufficient lubrication and running by force, In turn result in bearing unstable wear.

When the refrigerant liquid level 8 in evaporator reaches operating condition for the moment, liquid taking port 2, liquid taking port 3 and liquid taking port 4 can all have liquid It is flowed in the connecting pipe 5 of lower section and is collected by outlet conduit, then by communicating pipe 6 being connected to injector 7, by injector injection Purification oil return is carried out to fuel tank or compressor air suction mouth low-pressure end.

When the refrigerant liquid level 8 in evaporator reaches operating condition two, the liquid taking port 3 in middle position and the liquid taking port of extreme lower position 4 have liquid flow into connecting pipe 5 in collect, then by communicating pipe 6 connect injector 7, by injector injection to fuel tank or pressure Contracting machine air entry low-pressure end carries out purification oil return.If extreme higher position takes as shown in Figure 1, carrying out taking liquid in a conventional manner Liquid mouth 02 just has air to enter communicating pipe 07, and injector 05 is caused to be emptied, and then takes less than liquid, and injection oil return is caused to fail.This Invention can be effectively prevented from problem of the prior art, still can be by centre although 2 aneroid of liquid taking port of extreme higher position flows out The liquid that the liquid taking port 3 of position, the liquid taking port 4 of extreme lower position flow out enters the connecting pipe 5 of lower section and collects, so that in highest Fluid-tight is formed in the outlet conduit of the liquid taking port 2 of position, prevent the gas in liquid taking port 2 is from into communicating pipe 6, and then will not It causes injection that liquid is taken to be emptied, takes less than liquid, injection oil return is caused to fail.

Similarly, when the refrigerant liquid level 8 in evaporator reaches operating condition three, the liquid taking port 4 of extreme lower position also has liquid flow Enter connecting pipe 5, then injector 7 connected by communicating pipe 6, by injector injection to fuel tank or compressor air suction mouth low-pressure end into Row purification oil return.If intermediate liquid taking port 03 and extreme higher position take liquid as shown in Figure 1, carry out taking liquid in a conventional manner Mouth 02 just has air to enter communicating pipe 07, causes injector to be emptied, and then can take less than liquid, and injection oil return is caused to fail.And this Invention can be effectively prevented from this problem, although 2 aneroid of the liquid taking port outflow of intermediate liquid taking port 3 and extreme higher position, according to The old connecting pipe 5 that can enter lower section by the liquid that the liquid taking port 4 of extreme lower position flows out, so that the liquid taking port in extreme higher position 2 and middle position liquid taking port 3 outlet conduit in form fluid-tight, prevent the gas in liquid taking port 2 and liquid taking port 3 from into even In siphunculus 6, and then it not will cause injection and liquid taken to be emptied, take less than liquid, injection oil return is caused to fail.

The invention also provides a kind of air-conditioning systems that liquid structure is taken with the injection oil return.

The present invention is a kind of based on different operating condition fluid changes and the injection oil return that can avoid that liquid is taken to be emptied takes liquid structure, The liquid taking port of multiple and different height is equipped on evaporator tube, liquid taking port extends the connectivity part with the communicating pipe downward, Horizontal position lower than the liquid taking port of extreme lower position avoids injection that liquid is taken to inhale so that automatically generating fluid-tight in injection pipeline It is empty.It not only solves the problems, such as to take because of different operating condition fluid change injection oil returns less than liquid, but also the significant effect of injection oil return, have Effect reduces the lubrication oil content in refrigerant, guarantees refrigerant performance, improves refrigerant service life, it is reliable to improve unit Property.

Above-described embodiment is merely to illustrate a specific embodiment of the invention.It should be pointed out that for the general of this field For logical technical staff, without departing from the inventive concept of the premise, several deformations and variation can also be made, these deformations and Variation all should belong to protection scope of the present invention.