CN206771788U - Compression refrigeration equipment - Google Patents
Compression refrigeration equipment Download PDFInfo
- Publication number
- CN206771788U CN206771788U CN201720441449.0U CN201720441449U CN206771788U CN 206771788 U CN206771788 U CN 206771788U CN 201720441449 U CN201720441449 U CN 201720441449U CN 206771788 U CN206771788 U CN 206771788U
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- China
- Prior art keywords
- refrigeration equipment
- compression refrigeration
- equipment according
- low
- refrigerant
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/16—Lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2515—Flow valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2519—On-off valves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Lubricants (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Compressor (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
It the utility model is related to a kind of compression refrigeration equipment with refrigerant circulation, wherein, lubricant is added with into the refrigerant of circulation, it is mainly oily, integrate at least one liquid separator for lubricating compressor, and in low-pressure side, wherein, an exhaust manifold, preferably a controllable type exhaust manifold are equipped with low-pressure side, when the refrigeration plant is in operation at part load for controlling the gas flow rate of low-pressure side.
Description
Technical field
A kind of compression refrigeration equipment with refrigerant circulation is the utility model is related to, wherein, into the refrigerant of circulation
Added with lubricant, at least one liquid separator is integrated for lubricating compressor, and in low-pressure side.
Background technology
A liquid separator can be equipped with air-conditioning equipment, for protecting compressor.Fig. 1 is illustrated that for this
The connected mode of class refrigeration plant.Refrigerant is being transported to liquefier 2 again after the compression of compressor 1.Will by expansion valve 3
Liquid refrigerant is promptly released into evaporator 4.It is referred to as low-pressure side from evaporator 4 to the part compressor 1.Shown model
A liquid separator 5 is equipped between evaporator 4 and compressor 1, gaseous refrigerant is therefrom sucked by compressor 1.To
Lubricant is added with refrigerant, mainly oil, for lubricating compressor 1.
Refrigeration plant, especially those refrigeration plants for being used to implement transport, mainly air traffic or railway traffic, go out
Consider in efficiency reasons, it should according to refrigeration can need that refrigeration plant is adjusted.Therefore, refrigeration plant can be with achievement unit
Divide load operation.Maximally effective sub-load adjusting method is exactly the mass flow for reducing refrigerant, such as：Compressed by reducing
Rotating speed or closing pair cylinders or the one or more compressors for turning off equipment complex on machine 1.
However, the mass flow for reducing refrigerant can also reduce flow velocity of the refrigerant in circulation simultaneously.Machine can be real
The benchmark of existing normal operation is just their ability in low-pressure side, because the compressor oil circulated here is in gaseous refrigerant
It will not dissolve, therefore, can only be realized by refrigerant flowing weaker transportability.
In order to overcome this problem, can be significantly improved by being substantially reduced towards the service cross section of compressor
Gas velocity, so as to convey enough oil to compressor.However, shortcoming is：This, which may result in, there is significantly larger pressure
Power is lost, and obvious power attenuation is caused to machine with this.If from relatively excessive cross-section of pipeline, then compression mechanism
Although the pressure loss in cryogen pipeline is able to maintain that in reduced levels, still, when the mass flow of refrigerant is very few and gas
Speed can not ensure that oil is back to compressor completely when too low.
Another method is exactly that an extra oil eliminator is installed on compressor outlet.It is recommended that executive control operation,
In order to by the higher air-conditioning equipment circular flow of refrigerant mass fluxes with interval at regular intervals to quilt in SAPMAC method
The oil for being transmitted back to compressor is rinsed.
However, above-mentioned solution method is subject to certain restrictions all the time.Therefore, the purpose of this utility model is intended to for compression
Refrigeration plant develops a kind of novel solution, so as to evade disadvantages mentioned above.
Utility model content
According to the feature in claim 1, by compression refrigeration equipment to realize the purpose.The design of preferred machine be exactly from
Description in main claim to secondary claim.
According to the utility model, it is proposed that refrigerant circulation is installed to compression refrigeration equipment, wherein, into the refrigerant of circulation
Added with lubricant, for lubricating compressor.On the other hand, integrate at least one liquid separator in low-pressure side.Match somebody with somebody in low-pressure side
Provided with a controllable type exhaust manifold, sub-load is in the case that this kind of refrigeration plant is very few in refrigerant mass fluxes
It is used to ensure that oil is smoothly back to compressor during operation.
When necessary, more or several exhaust discriminations may be distributed in from evaporator to the refrigerant flow of compressor
Even it is limited in pipe in an exhaust manifold.Being distributed in more exhaust manifolds can cause gas flow rate to reduce, still, limitation
Gas flow rate can but be accelerated on the contrary in several exhaust manifolds.Thus, must be low for controlling by a controllable type exhaust manifold
Caused gas flow rate on side is pressed, can fully be returned with the oil for ensuring to be added into the refrigerant in operation at part load
It flow to compressor.
In principle, current cross-section of pipeline can be changed by exhaust manifold.At least one exhaust of locking must be passed through
Manifold to improve caused gas flow rate in low pressure range, meanwhile, can make when fully switched on all exhaust manifolds be
The pressure loss of system minimizes, and realizes maximum quality flow with this.
A liquid separator can be installed respectively at least two exhaust manifolds.Preferentially filled inside every exhaust manifold
An if single liquid separator.
Preferably at least there is an exhaust manifold to carry a locking device, in order to as needed or according to refrigerant circulation
Load is to connect or the locking exhaust manifold.Streamwise installs locking device preferably on rear side of liquid separator.Or also
The upstream of liquid separator can be laid in.
In the simplest situations, two liquid separators installed should at least are of the same size and specification.
All liq separator in low-pressure side can also be designed to identical size and specification, that is to say, that design specification is identical
And operation principle is identical.In the ideal case, the technical size for the liquid separator installed can be with the part of refrigeration plant
Load level matches.The size design of separator is mainly easy to adjust the pressure loss in low-pressure side under full load conditions, and
And under part load to ensure that lubricant can smoothly be back to compressor.
Or the structure type of a liquid separator is respectively provided with for above-mentioned every exhaust manifold, can also be low
Side is pressed to design at least one liquid separator, it is characterised in that with least two suction interface tubes.Therefore, at exhaust manifold
Inside liquid separator.
Furthermore, it is possible to design by least one locking device to assemble the suction interface tube or suction line therein.Together
When in such a case, it is possible to be decided whether that the two suction interface tubes must be connected according to load condition, with this as far as possible by system
In pressure loss situation maintain floor level, or, can be decided whether according to load condition must be by least one lock
Device is closed with a locking at least suction line, gas flow rate can just be improved when load reduction with this, thus to guarantee
It is enough that lubricant therein is smoothly back to compressor.
According to preferred constructive form, the cross section that should at least have two suction interface tubes is of the same size and specification.
The cross section of all suction interface tubes of preferably liquid separator is all of the same size and specification.Here, it is noted that：This
Kind size design is mainly easy to adjust the pressure loss in low-pressure side under full load conditions.And under part load to ensure to moisten
Lubrication prescription can smoothly be back to compressor.
It is, of course, also possible to multiple liquid separators are designed in system, and each liquid separator is respectively provided with least two
Individual or multiple suction interface tubes.
For both modification structures, be preferably equipped with a controller, for detect refrigerant mass flow and by
This implements switch control to exhaust manifold.Especially when normal duty is run, at least one locking device is opened by controller,
In order to which the pressure loss in system is minimized as far as possible.Part load operating conditions when refrigerant mass fluxes are very few
Under, controller must then close at least one locking device, in order to artificially accelerate caused gas flowing speed in low pressure pipeline
Degree.
Refrigerant employed in compression refrigeration equipment is preferably carbon dioxide.If using carbon dioxide as refrigeration
If agent, then can be using evaporator 2 as gas cooler.
Brief description of the drawings
It should hereinafter be further elaborated with that of the present utility model other are excellent according to the topology example shown in figure
Point and feature.Mainly：
Fig. 1：According to the refrigeration plant schematic structure of state-of-the-art technology situation；
Fig. 2：The first compression refrigeration equipment topology example in the utility model, with
Fig. 3 A：Second of compression refrigeration equipment topology example in the utility model, without check-valves；With
Fig. 3 B：Second of compression refrigeration equipment topology example in the utility model, with check-valves 7；
Fig. 4：The third compression refrigeration equipment topology example in the utility model.
Embodiment
The conventional refrigeration device structure in Fig. 1 has at large been explained in background section of the present utility model
State.The problem of being previously mentioned in background technology of the present utility model is equally also for the liquid being integrated into compressor suction line point
From device 5.It in operation at part load, must ensure that gas flow rate is maintained at minimum speed, ensure that oil can be smoothly back to this
Compressor 1.
Compression refrigeration equipment structure in the utility model is mainly made up of the compressor 1 being connected with liquefier 2.Refrigeration
Agent is continued flow through to expansion valve 3 from liquefier 2, and liquid refrigerant is promptly released into evaporator 4 herein.It is new according to this practicality
Type, for the functional unit in liquid separator, notably the mass flow of refrigerant is tieed up as far as possible in operation at part load
Hold in reduced levels, on the other hand, particular for the topology example in Fig. 2, at least two liquid separator 5a, 5b will be used.On the other hand,
It is divided into two exhaust manifolds from evaporator 4 to the pipeline between compressor 1, wherein, every exhaust manifold is all respectively provided with one
Individual separator 5a, 5b of oneself.The two liquid separators 5a, 5b are connected in the shape that is parallel to each other with the output end of evaporator 4.
Liquid separator 5a, 5b size and the sub-load grade of refrigeration plant match.In the simplest situations,
Two identical liquid separator 5a, 5b can be used.
At least an exhaust manifold is equipped with a locking device 6, the locking device can be set as into magnetic valve.Cause
This, can be as desired by magnetic valve 6 with connection or locking liquid separator 5a entrance.Liquid separator 5a, 5b suction
It is coordinated type to enter joint, and is connected to compressor to supply tube shaped.
By the integrated form controller of compression refrigeration equipment according to the mass flow of refrigerant to control stop valve 6.Thus with
Ensure that refrigerant can be separated by the liquid not being blocked under the too low part load operating conditions of refrigerant mass fluxes
Device 5b is flowed through, and can be adjusted to sufficiently large refrigerant gas flow velocity to ensure the smooth backflow of oil, even if working as whole system
Only exist in operation at part load., whereas if system is run in the case of normal duty and the mass flow of refrigerant is sufficient
Words, then by opening stop valve 6 so that whole refrigerant mass fluxes by the two separators 5a, 5b to flow through
To compressor.
Shown is exactly another structure type in the utility model in Fig. 4.This modification structures and Fig. 2 and Fig. 3
Middle modification structures differ only in low-pressure side.Only with only one liquid separator 5 to substitute two free-standing liquid
Separator, the liquid separator have the input that only one is connected with evaporator 4.Liquid separator 5 includes at least two
Individual suction pipe joint, wherein it is possible to using a locking device 6, such as a magnetic valve, inhaled for locking at least one of which
Enter pipe joint.The output end of stop valve 6 is designed on second connecting pipe, thus to cause compressor 1 by one altogether
It is connected with joint with this two connecting pipes of liquid separator 5.
The sub-load grade of the cross section of suction pipe joint and refrigeration plant matches in liquid separator 5.Most simple
In the case of list, these suction pipe joints have identical cross section.Ensure that whole refrigerant mass fluxes pass through not with this
The suction line being blocked flows through, and can adjust to sufficiently large refrigerant gas flow velocity to ensure the smooth backflow of oil.Just
Often during operation, stop valve 6 is opening.
Claims (17)
1. the compression refrigeration equipment with refrigerant circulation, wherein, lubricant is added with the refrigerant of circulation,
At least one liquid separator is integrated for lubricating compressor, and in low-pressure side,
Characterized in that,
An exhaust manifold is equipped in low-pressure side, is used to control low-pressure side when the refrigeration plant is in operation at part load
Gas flow rate.
2. compression refrigeration equipment according to claim 1, it is characterised in that it is equipped with least two exhaust manifolds, every
Exhaust manifold all carries a liquid separator.
3. compression refrigeration equipment according to claim 2, it is characterised in that the exhaust manifold of branched low pressure side at least arranges
There is a locking device.
4. compression refrigeration equipment according to claim 3, it is characterised in that the locking device streamwise is located at liquid
On front side of separator.
5. compression refrigeration equipment according to claim 3, it is characterised in that the locking device streamwise is located at liquid
On rear side of separator.
6. according to the compression refrigeration equipment described in claim 2 to 5 one of which claim, it is characterised in that should at least have
Two liquid separators installed are of the same size and specification, wherein, the size design of separator is easy in fully loaded feelings
The pressure loss in low-pressure side is adjusted under condition, and under part load to ensure that lubricant can smoothly be back to compressor.
7. compression refrigeration equipment according to claim 1 a, it is characterised in that liquid separator is equipped with least two
Suction pipe joint, for forming integrated exhaust manifolds.
8. compression refrigeration equipment according to claim 6, it is characterised in that by least one locking device to assemble this
A little suction lines.
9. compression refrigeration equipment according to claim 6, it is characterised in that should at least have two suction pipe joints that there is phase
Same size and specification, wherein, the size design of separator is easy to adjust the pressure loss in low-pressure side under full load conditions, and
And under part load to ensure that lubricant can smoothly be back to compressor.
10. compression refrigeration equipment according to claim 7, it is characterised in that should at least there are two suction pipe joints to have
Identical size and specification, wherein, the size design of separator is easy to adjust the pressure loss in low-pressure side under full load conditions,
And under part load to ensure that lubricant can smoothly be back to compressor.
11. according to the compression refrigeration equipment any one of claim 1,2,3,4,5,7,8,9,10, it is characterised in that match somebody with somebody
Provided with a control device, for detecting the mass flow of refrigerant and thus to access exhaust manifold, being existed by control device
At least one locking device is opened in normal duty operation and the locking device is turned off in operation at part load.
12. according to the compression refrigeration equipment any one of claim 1,2,3,4,5,7,8,9,10, it is characterised in that institute
Refrigerant is stated to be exactly or contain CO2。
13. compression refrigeration equipment according to claim 1, it is characterised in that the lubricant is oil.
14. compression refrigeration equipment according to claim 1, it is characterised in that the exhaust manifold is that controllable type is vented discrimination
Pipe.
15. the compression refrigeration equipment according to claim 3 or 8, it is characterised in that the locking device is magnetic valve.
16. compression refrigeration equipment according to claim 6, it is characterised in that all liquid separators all have identical
Size and specification.
17. the compression refrigeration equipment according to claim 9 or 10, it is characterised in that all suction pipe joints all have
Identical size and specification.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE202016002641.1 | 2016-04-25 | ||
| DE202016002641.1U DE202016002641U1 (en) | 2016-04-25 | 2016-04-25 | Compression chiller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206771788U true CN206771788U (en) | 2017-12-19 |
Family
ID=58501348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720441449.0U Active CN206771788U (en) | 2016-04-25 | 2017-04-25 | Compression refrigeration equipment |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3239627B1 (en) |
| CN (1) | CN206771788U (en) |
| DE (1) | DE202016002641U1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH329705A (en) * | 1954-11-24 | 1958-05-15 | Sulzer Ag | Method for cooling freshly slaughtered animals and refrigeration system for carrying out the method |
| PT672875E (en) * | 1994-03-15 | 2000-11-30 | Mitsubishi Electric Corp | AIR CONDITIONING SYSTEM, ACCUMULATOR FOR THE SAME AND PROCESS FOR THE ACCUMULATING MANUFACTURING |
| DE10342110A1 (en) * | 2002-10-10 | 2004-04-29 | Behr Gmbh & Co. Kg | Method for reducing the pressure in a vehicle air conditioner when the compressor stops has a reservoir situated between the evaporator and expansion valve to collect excess refrigerant |
| DE102005022513A1 (en) * | 2005-05-11 | 2006-11-16 | Behr Gmbh & Co. Kg | Refrigerant pipes for air conditioners |
| JP4557031B2 (en) * | 2008-03-27 | 2010-10-06 | 株式会社デンソー | Air conditioner for vehicles |
| DE102012004801B4 (en) * | 2012-03-08 | 2016-02-18 | Gea Refrigeration Germany Gmbh | Arrangement for a heat pump with screw compressor |
| US10775060B2 (en) * | 2013-10-24 | 2020-09-15 | Mitsubishi Electric Corporation | Air-conditioning apparatus |
-
2016
- 2016-04-25 DE DE202016002641.1U patent/DE202016002641U1/en active Active
-
2017
- 2017-04-07 EP EP17165449.4A patent/EP3239627B1/en active Active
- 2017-04-25 CN CN201720441449.0U patent/CN206771788U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP3239627B1 (en) | 2023-06-28 |
| DE202016002641U1 (en) | 2017-07-26 |
| EP3239627A1 (en) | 2017-11-01 |
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| GR01 | Patent grant |