CN2771759Y - Screw full-liquid type cooling-water machine set - Google Patents
Screw full-liquid type cooling-water machine set Download PDFInfo
- Publication number
- CN2771759Y CN2771759Y CN 200520055918 CN200520055918U CN2771759Y CN 2771759 Y CN2771759 Y CN 2771759Y CN 200520055918 CN200520055918 CN 200520055918 CN 200520055918 U CN200520055918 U CN 200520055918U CN 2771759 Y CN2771759 Y CN 2771759Y
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- compressor
- water chilling
- chilling units
- handpiece water
- oil
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Abstract
The utility model provides an efficient injection oil return loop and an injection power source. The utility model comprises a compressor, an oil-gas separator, a condenser, a restricting element and an evaporator which are orderly connected to form a loop, and an oil return loop which is formed in the way that a pipe led out of the condenser, and a pipe led out of the evaporator are gathered on an injector and are connected with a pipe of the compressor by a pipe. The utility model has good injection performance, and greatly enhances the oil return performance of the compressor, so the operation of the whole system is stable and reliable. The experiments prove that even under partial load, the utility model can work stably and reliably.
Description
Technical field
The utility model belongs to the refrigeration and air-conditioning technical field, particularly large-scale screw flooded handpiece Water Chilling Units.
Background technology
At present, the exploitation of screw flooded handpiece Water Chilling Units more and more becomes the focus of domestic large-scale handpiece Water Chilling Units technical field, it is special after country has announced the energy-conservation evaluation criterion of new handpiece Water Chilling Units, the full-liquid type handpiece Water Chilling Units be because can significantly improve the Energy Efficiency Ratio of unit, becomes each large-scale central air-conditioning manufacturing firm competition focal point especially.As everyone knows, screw flooded for a long time handpiece Water Chilling Units generally is faced with a difficult problem, i.e. the problem of compressor oil return, if compressor oil return problem can not get good solution, compressor is easy to damage; The compressor cost of general large-scale handpiece Water Chilling Units all compares expensive, if regular needing changed, that will cause very big loss.In order to improve, improve screw flooded handpiece Water Chilling Units compressor oil return performance, a lot of producers all are provided with injection oil return loop in unit, but these producers are at the key equipment in design injection oil return loop--the power sources that adopt gases at high pressure, low-pressure gas as injection during-injector more, the shortcoming of these designs is that gas has bigger compressibility, the injection that causes injector is than low, physical dimension is big, the working condition instability.
Summary of the invention
The purpose of this utility model just is, solves the deficiencies in the prior art, and a kind of more efficiently injection oil return loop and injection power source are provided.
The purpose of this utility model is achieved by the following technical solution, a kind of new screw full-liquid type handpiece Water Chilling Units, comprise the compressor, gs-oil separator, condenser, restricting element, the evaporimeter that connect and form the loop successively, it is characterized in that, also comprise injection oil return loop in the described unit, the pipeline that described injection oil return loop is drawn from described evaporimeter by a pipeline of drawing from described condenser and and two pipelines are summarized in after the injector pipeline that is connected in described compressor by pipeline again and form.
The highly pressurised liquid that described injector employing is come out from described condenser is as the power source of injection.
Since the utility model adopted from described condenser, extract high liquid liquid as the power source of injection, because the Incoercibility of liquid, make the injector injection than high, shown good injection performance, cause the oil return performance of compressor to obtain improving significantly, the whole system operation is more reliable and more stable.Even experiment showed, when sub-load, also work that can be reliable and stable.
Description of drawings
Fig. 1 is the connection operation schematic diagram of unit embodiment one described in the utility model.
Fig. 2 is the connection operation schematic diagram of unit embodiment two described in the utility model.
The specific embodiment
Embodiment one
As shown in Figure 1, the connection for unit embodiment described in the utility model moves schematic diagram.A kind of new screw full-liquid type handpiece Water Chilling Units, comprise the compressor 1, gs-oil separator 3 (generally being called for short oil content), condenser 4, restricting element 6,7, the evaporimeter 8 that connect and form the loop successively, this loop is the major loop of handpiece Water Chilling Units, represents with solid line in the drawings.
Between described compressor 1 and described gs-oil separator 3 except from described compressor 1 to the backbone of described gs-oil separator 3, also be provided with a pipeline that is drawn out to described compressor 1 from described gs-oil separator 3, represent with double dot dash line that in the drawings we are commonly called as secondary oil content oil return loop; In described secondary oil content oil return loop, generally be provided with first filter 2 and be used for filtering the oil of separating from described gs-oil separator 3, in order to avoid impurity enters compressor 1.Also formed a little circulation like this between described compressor 1 and described gs-oil separator 3, it can send back to the oil that described gs-oil separator 3 is separated in the described compressor 1.
Also comprise injection oil return loop in the described unit, dot in the drawings.Described injection oil return loop comprises a pipeline and a pipeline of drawing from described evaporimeter 8 of drawing from described condenser 4, and two described pipelines are connected in described compressor 1 by pipeline after being summarized in injector 11 again.The pipeline of drawing, be provided with a magnetic valve 10, the pipeline of drawing, be provided with second filter 9 from described evaporimeter 8 from described condenser 4.Described magnetic valve 10 is intermittent work, in the utility model, when compressor needs oil return, open described magnetic valve 10, the custom-designed described injector 11 of highly pressurised liquid process from described condenser comes out produces the suction effect of drawing, under powerful absorption affinity effect in the evaporimeter the higher liquid of oil concentration some drawn through second filter 9 and be drawn onto in the injector, after the highly pressurised liquid that produces injection mixes, get back to described compressor 1, thereby guaranteed the oil return of system.
In the utility model, described condenser 4 and described restricting element 6,7 between, drawn the pipeline of two parallel connections from condenser 4, on a pipeline, be provided with device for drying and filtering 5, described device for drying and filtering 5 is intermittent work, promptly under general situation, the highly pressurised liquid from described condenser 4 to described restricting element 6,7 still passes through from an other pipeline.
Air current flow direction when as shown in the figure, arrow is represented handpiece Water Chilling Units work; In working order, the high temperature and high pressure gas that comes out from compressor 1 flows through external gs-oil separator 3, carry out Oil-gas Separation, the oil of separating is through 2 times compressors 1 of described filter, and the gas after the separation enters condenser 4, is condensed into highly pressurised liquid in described condenser 4, becoming low pressure liquid behind the restricting element of forming through two electric expansion valves in parallel with orifice plate 67 flows in the described evaporimeter 8, in described evaporimeter 8, cold-producing medium is evaporated, and the gas after the evaporation is inhaled into compressor 1.For the highly pressurised liquid drying that keeps coming out from described condenser 4,5 pairs of described highly pressurised liquids of intermittent unlatching device for drying and filtering carry out dry filter, enter restricting element again.Described magnetic valve 10 is intermittent work, when compressor needs oil return, open described magnetic valve 10, the highly pressurised liquid that comes out from described condenser passes through custom-designed described injector 11, the suction effect is drawn in generation, under powerful absorption affinity effect in the evaporimeter the higher liquid of oil concentration some drawn through second filter 9 and be drawn onto in the injector, after the highly pressurised liquid that produces injection mixes, get back to described compressor 1, thereby guaranteed the oil return of system.
The problem of the compressor oil return difficulty of mentioning in background technology of the present utility model is because there is the problem of oil return difficulty in flooded evaporator from saying in fact.Because behind the process restricting element, the highly pressurised liquid that comes out from described condenser 4 has become the liquid of low-temp low-pressure, in this low-temp low-pressure liquid, contain the compressor oil that is not separated fully, because the evaporation point temperature of compressor oil is higher, after cold-producing medium was vaporized in evaporimeter, described compressor oil but was left in the described evaporimeter, on the tube wall attached to evaporimeter, not only return and make compressor lack lubricating oil and damage, and can be that the heat exchange efficiency of evaporimeter reduces greatly.Therefore, improve drawing of screw flooded handpiece Water Chilling Units establish the oil return loop, the oil return performance that improves system is that economic implications is arranged very much.The utility model has adopted a kind of novel unique way just---from described condenser, extract high liquid liquid as the power source of injection, because the Incoercibility of liquid, make the injector injection than high, shown good injection performance, cause the oil return performance of compressor to obtain improving significantly, the whole system operation is more reliable and more stable.
In the present embodiment, described restricting element is formed in parallel by described orifice plate 6 and two described electric expansion valves 7, in system's running, orifice plate is main throttle part, most of feed flow liquid passes through from orifice plate, and electric expansion valve is a bypass, and fraction feed flow liquid passes through from electric expansion valve.Orifice plate is during as restricting element, can not regulate because of the aperture size, the restriction characteristic of system can not remain at the best, and increases the correction of the electric expansion valve of two less abilities as the orifice plate restriction characteristic, the system that both guaranteed operates in optimum state all the time, has also saved the cost of restricting element.Certainly, the quantity of described electric expansion valve 7 also can have only one.
Embodiment two
As shown in Figure 2, the connection for unit embodiment two described in the utility model moves schematic diagram.It in the present embodiment multi-compressor parallel-screw flooded-type handpiece Water Chilling Units, in the utility model, the oil return system of compressor is the same with embodiment one, also adopted the power source of highly pressurised liquid as injection, be with the difference of embodiment one, present embodiment has adopted three compressors 1,1 '; 1 " between three compressors, be provided with compressor oil balance pipe 12 (representing with chain-dotted line in the drawings), utilize described oil balance tube will come to get back to the oil of compressor 1 and from described evaporimeter 8, attract and the oil that goes out to get back to compressor 1 equilibrates to each compressor in parallel 1 from described gs-oil separator 3 is isolated through described injector 11 through first filter 2,1 '; 1 " in go.
Air current flow direction when as shown in the figure, arrow is represented handpiece Water Chilling Units work; In working order, from compressor 1,1 ', 1 " high temperature and high pressure gas that comes out flows through external gs-oil separator 3; carry out Oil-gas Separation, the oil of separating equilibrates to each compressor in parallel 1,1 ', 1 by described oil balance tube again through 2 times compressors 1 of described filter " in go.Gas after the separation enters condenser 4, in described condenser 4, be condensed into highly pressurised liquid, becoming low pressure liquid behind the restricting element of forming through two electric expansion valves in parallel with orifice plate 67 flows in the described evaporimeter 8, in described evaporimeter 8, cold-producing medium is evaporated, and the gas after the evaporation is inhaled into compressor 1.For the highly pressurised liquid drying that keeps coming out from described condenser 4,5 pairs of described highly pressurised liquids of intermittent unlatching device for drying and filtering carry out dry filter, enter restricting element again.Described magnetic valve 10 is intermittent work, when compressor needs oil return, open described magnetic valve 10, the highly pressurised liquid that comes out from described condenser passes through custom-designed described injector 11, the suction effect is drawn in generation, under powerful absorption affinity effect in the evaporimeter the higher liquid of oil concentration some drawn through second filter 9 and be drawn onto in the injector, after the highly pressurised liquid that produces injection mixes, get back to described compressor 1, equilibrate to each compressor in parallel 1,1 ', 1 by described oil balance tube again " in go, thereby guaranteed the oil return of system.
In the present embodiment, also can adopt two, four and more compressor parallel.
Traditional a plurality of systems of unit of multi-compressor system are that respectively independently the mutually noninterfere of a plurality of systems is independent of each other, and separately evaporimeter and condenser are arranged; Independently for the multisystem, the distinguishing feature of present embodiment is a shared condenser of a plurality of refrigeration systems and an evaporimeter (as shown in the figure) with respect to this difference, and the advantage of this system is the Energy Efficiency Ratio height of sub-load.Because when sub-load, the heat exchange area of evaporimeter, condenser is equivalent to many times (multiple is identical with the number of compressor) of a plurality of autonomous system heat exchange areas all the time, to be equivalent to increased heat exchange area, and increased the heat exchange area of evaporimeter, condenser, can improve the performance of unit; Particularly when having only a compressor to open, more obvious to the raising of unit performance.MSDS shows a handpiece Water Chilling Units in actual moving process according to statistics, and it all is in operation at part load that the time more than 90% is arranged, so the energy-saving effect of native system is significant for practice; On the other hand, an integral body is made by a plurality of independently systems, can save materials being fabricated, reduce manufacture craft, thereby reduced manufacturing cost.
The utility model also has other distortion and change, for example, can only be orifice plate or electric expansion valve or common heating power expansion valve in the use of restricting element, and the combination of quantity also is varied etc.In addition, the parallel system of multi-compressor, orifice plate add the throttling control scheme of electronics expansion valve, also are not limited to use highly pressurised liquid as the injection power source, also can utilize gases at high pressure or low-pressure gas as the injection power source, at this moment, corresponding adjustment should be done in injection oil return loop.In the utility model, in the whole unit, for the convenience of overhauling or controlling can also be installed some ball valves, check valve etc.Therefore, those skilled in the art to unsubstantiality that the utility model is done, conspicuous change or improve and all should belong to protection domain of the present utility model.
Claims (10)
1, a kind of new screw full-liquid type handpiece Water Chilling Units, comprise the compressor, gs-oil separator, condenser, restricting element, the evaporimeter that connect and form the loop successively, it is characterized in that, also comprise injection oil return loop in the described unit, described injection oil return loop comprises a pipeline and a pipeline of drawing from described evaporimeter of drawing from described condenser, and two described pipelines are connected in described compressor by pipeline after being summarized in injector again.
2, a kind of new screw full-liquid type handpiece Water Chilling Units according to claim 1 is characterized in that, the highly pressurised liquid that described injector employing is come out from described condenser is as the power source of injection.
3, a kind of new screw full-liquid type handpiece Water Chilling Units according to claim 1 and 2 is characterized in that, is provided with a magnetic valve the pipeline of drawing from described condenser, is provided with second filter the pipeline of drawing from described evaporimeter.
4, a kind of new screw full-liquid type handpiece Water Chilling Units according to claim 3 is characterized in that described magnetic valve is intermittent work.
5, a kind of new screw full-liquid type handpiece Water Chilling Units according to claim 3, it is characterized in that, when compressor needs oil return, open described magnetic valve, the highly pressurised liquid that comes out from described condenser produces and draws the suction effect through described injector, under powerful absorption affinity effect in the evaporimeter the higher liquid of oil concentration some drawn through second filter and be drawn onto in the injector, after the highly pressurised liquid that produces injection mixes, get back to described compressor.
6, a kind of new screw full-liquid type handpiece Water Chilling Units according to claim 1 and 2, it is characterized in that, also be provided with one and be drawn out to the pipeline of described compressor from described gs-oil separator between described compressor and described gs-oil separator, it can send back to the oil that described gs-oil separator is separated in the described compressor.
7, a kind of new screw full-liquid type handpiece Water Chilling Units according to claim 1 and 2 is characterized in that, between described condenser and described restricting element, has drawn the pipeline of two parallel connections from condenser, is provided with device for drying and filtering on a pipeline.
8, a kind of new screw full-liquid type handpiece Water Chilling Units according to claim 7 is characterized in that described device for drying and filtering is intermittent work.
9, a kind of new screw full-liquid type handpiece Water Chilling Units according to claim 1 and 2 is characterized in that, described compressor is that a plurality of compressor parallels form, and is provided with oil balance tube between a plurality of compressors.
10, a kind of new screw full-liquid type handpiece Water Chilling Units according to claim 1 and 2 is characterized in that described restricting element is formed in parallel by orifice plate and electric expansion valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520055918 CN2771759Y (en) | 2005-03-23 | 2005-03-23 | Screw full-liquid type cooling-water machine set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520055918 CN2771759Y (en) | 2005-03-23 | 2005-03-23 | Screw full-liquid type cooling-water machine set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2771759Y true CN2771759Y (en) | 2006-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520055918 Expired - Lifetime CN2771759Y (en) | 2005-03-23 | 2005-03-23 | Screw full-liquid type cooling-water machine set |
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| CN (1) | CN2771759Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852509A (en) * | 2010-05-21 | 2010-10-06 | 北京中科华誉能源技术发展有限责任公司 | Flooded water-source heat pump unit with refrigerant side cold and heat reversion |
| CN101936618A (en) * | 2010-08-27 | 2011-01-05 | 殷尧其 | Internal switching water source heat pump unit with heat recovery |
| WO2012163120A1 (en) * | 2011-05-30 | 2012-12-06 | 宁波奥克斯电气有限公司 | Refrigerating multi-connected central air conditioning device with a screw compressor |
| CN103363724A (en) * | 2012-04-10 | 2013-10-23 | 丹佛斯（天津）有限公司 | Oil balance device for oil balance between compressors |
| CN104279794A (en) * | 2014-10-21 | 2015-01-14 | 郑州大学 | Heat pump system with smoke waste heat full-recovery function and method for preparing high-temperature hot water |
-
2005
- 2005-03-23 CN CN 200520055918 patent/CN2771759Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852509A (en) * | 2010-05-21 | 2010-10-06 | 北京中科华誉能源技术发展有限责任公司 | Flooded water-source heat pump unit with refrigerant side cold and heat reversion |
| CN101852509B (en) * | 2010-05-21 | 2011-11-09 | 北京中科华誉能源技术发展有限责任公司 | Flooded water-source heat pump unit with refrigerant side cold and heat reversion |
| CN101936618A (en) * | 2010-08-27 | 2011-01-05 | 殷尧其 | Internal switching water source heat pump unit with heat recovery |
| WO2012163120A1 (en) * | 2011-05-30 | 2012-12-06 | 宁波奥克斯电气有限公司 | Refrigerating multi-connected central air conditioning device with a screw compressor |
| CN103363724A (en) * | 2012-04-10 | 2013-10-23 | 丹佛斯（天津）有限公司 | Oil balance device for oil balance between compressors |
| CN103363724B (en) * | 2012-04-10 | 2016-01-13 | 丹佛斯（天津）有限公司 | For the oil balancing unit of compressor chamber oil balance |
| CN104279794A (en) * | 2014-10-21 | 2015-01-14 | 郑州大学 | Heat pump system with smoke waste heat full-recovery function and method for preparing high-temperature hot water |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150323 Granted publication date: 20060412 |