CN106091188A - Refrigeration unit - Google Patents
Refrigeration unit Download PDFInfo
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- CN106091188A CN106091188A CN201610406908.1A CN201610406908A CN106091188A CN 106091188 A CN106091188 A CN 106091188A CN 201610406908 A CN201610406908 A CN 201610406908A CN 106091188 A CN106091188 A CN 106091188A
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- Prior art keywords
- coolant
- pump housing
- refrigeration unit
- coolant pump
- bearing
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
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- 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
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- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of refrigeration unit, oil-free centrifugal compressor, vaporizer and condenser including composition refrigerant circulation stream, oil-free centrifugal compressor includes motor, many group bearings and impeller, many group bearings are outer respectively to be enclosed within the armature spindle of motor, and impeller is located on armature spindle and rotates to be driven by armature spindle；Refrigeration unit also includes: for carrying the coolant pump housing of coolant, and the outlet of the coolant pump housing is corresponding with each bearing to provide the coolant as lubricating fluid to each bearing, and the entrance of the coolant pump housing is connected with at least one in vaporizer and condenser；Control device, control device and be connected with the coolant pump housing and oil-free centrifugal compressor respectively.Refrigeration unit according to the present invention, this not only can play and act on bearing lubrication improving the service life of bearing, and simple in construction, simplify the control system of refrigeration unit, thus reduce fault rate and the cost of oil-free centrifugal compressor of control system.
Description
Technical field
The present invention relates to refrigeration technology field, especially relate to a kind of refrigeration unit.
Background technology
Usually, whether centrifugal refrigerating unit uses lubricating oil that bearing is lubricated cooling because of the bearing of compressor
Difference, is divided into and has oil and oil-free centrifugal refrigerating unit two kinds.
The compressor in oily centrifugal refrigerating unit that has in correlation technique uses dynamic pressure oil film sliding bearing or oil lubrication
Rolling bearing is countershaft to be supported, and is designed with travelling gear to be turned by gear-driven mode impeller in compressor simultaneously
Dynamic, noise is big.During utilizing lubricating oil to bearing lubrication, on the one hand of a relatively high because of lubricating oil viscosity, armature spindle exists
When bearing high speed rotates, mechanical loss is relatively big, on the other hand there is lubricating oil in the cooling cycle system of refrigeration unit, impact
The heat exchange efficiency of heat exchanger, this needs individually designed lubrication oil supply system, cooling system and recovery system in refrigeration unit,
Pipe-line system is complicated.
Compressor in oil-free centrifugal refrigerating unit in correlation technique uses magnetic suspension bearing, and motor is direct-connected with impeller
And gearless driving, utilize electromagnetic force to be suspended within the bearing by armature spindle, bearing and armature spindle are without direct friction.But this pressure
Contracting machine is relatively costly, and the control system of refrigeration unit is complicated；In order to prevent because of magnetic in the case of refrigeration unit emergency power off
The damage that the armature spindle that power disappears and causes causes with magnetic suspension bearing direct friction, needs additionally to configure replacement bearing.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the present invention carries
Go out a kind of refrigeration unit, not only can play and act on bearing lubrication improving the service life of bearing, and simple in construction,
Simplify the control system of refrigeration unit, reduce cost.
Refrigeration unit according to embodiments of the present invention, including composition the oil-free centrifugal compressor of refrigerant circulation stream, steaming
Sending out device and condenser, described oil-free centrifugal compressor includes motor, many group bearings and impeller, described many group bearing overcoats respectively
On the armature spindle of described motor, described impeller is located on described armature spindle and rotates to be driven by described armature spindle；Described refrigeration
Unit also includes: for carrying the coolant pump housing of coolant, the outlet of the described coolant pump housing is corresponding with each described bearing with to often
Individual described bearing provides in the coolant as lubricating fluid, the entrance of the described coolant pump housing and described vaporizer and described condenser
At least one is connected；Control device, described control device respectively with the described coolant pump housing and described oil-free centrifugal compressor phase
Even.
Refrigeration unit according to embodiments of the present invention, by arranging the coolant pump housing so that the entrance of the coolant pump housing and vaporizer
Being connected with at least one in condenser, the outlet simultaneously making coolant pump into is corresponding with each bearing to provide to each bearing
As the coolant of lubricating fluid, this not only can play and act on bearing lubrication improving the service life of bearing, and structure
Simply, simplify the control system of refrigeration unit, thus reduce the fault rate of control system and oil-free centrifugal compressor
Cost, and avoid the configuration of replacement bearing unnecessary in correlation technique, avoid simultaneously and correlation technique uses lubrication glossy
The bearing mechanical losses that plain besring brings is big, there is lubricating oil in cooling cycle system, heat exchanger heat exchange efficiency is low, needs additionally
The problems such as design lubrication oil supply system, cooling system and recovery system, simplify the pipeline of refrigeration unit largely
System.
According to some embodiments of the present invention, described vaporizer is by the entrance of the first refrigerant flow with the described coolant pump housing
Being connected, described condenser is connected with the entrance of the described coolant pump housing by the second refrigerant flow, described first refrigerant flow and institute
Stating and be in series with the control valve with opening and closing function on the second refrigerant flow respectively, two described control valves control dress with described respectively
Put connected.
Specifically, refrigeration unit includes: common conduit, the first end of described common conduit and the entrance of the described coolant pump housing
It is connected；First pipeline, the two ends of described first pipeline the second end with described vaporizer and described common conduit respectively is connected, institute
State the first pipeline and described common conduit forms described first refrigerant flow；Second pipe, the two ends of described second pipe are respectively
It is connected with the second end of described condenser and described common conduit, described second pipe and described common conduit composition described second
Refrigerant flow, described first pipeline and described second pipe are in series with described control valve respectively, and described first pipeline is connected
There is the check valve towards described common conduit one-way conduction.
According to some embodiments of the present invention, the bottom of described condenser and/or described vaporizer is provided with liquid trap, described
The entrance of the coolant pump housing is connected with described liquid trap.
Specifically, the bottom of described condenser and described vaporizer is respectively equipped with described liquid trap, two described liquid traps
Respectively and between the described coolant pump housing, be in series with described control valve, each described liquid trap is provided with and is connected with described control device
Liquid level sensor, described control device controls opening of two described control valves according to the testing result of described liquid level sensor
Close.
According to some embodiments of the present invention, the described coolant pump housing is connected with uninterrupted power source.
According to some embodiments of the present invention, refrigeration unit also includes that the first coolant being positioned at described bearing upstream filters
Device.
Further, described first coolant filter is two and is connected on outlet and the entrance of the described coolant pump housing respectively
Place.
According to some embodiments of the present invention, refrigeration unit also includes the cooling flowing path for cooling down motor, institute
The entrance point stating cooling flowing path connects with described condenser, and the port of export of described cooling flowing path connects with described vaporizer.
Specifically, it is in series with the second coolant filter between entrance point and the described condenser of described cooling flowing path.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of refrigeration unit according to embodiments of the present invention.
Reference:
Refrigeration unit 100；
Oil-free centrifugal compressor 1；Motor 11；Armature spindle 111；Bearing 12；Impeller 13；
Vaporizer 2；First refrigerant flow 21；First pipeline 211；Check valve 2111；
Condenser 3；Second refrigerant flow 31；Second pipe 311；
The coolant pump housing 4；Outlet 41；Entrance 42；Common conduit 421；
Control valve 5；Liquid trap 6；First coolant filter 7；
Cooling flowing path 8；Entrance point 81；The port of export 82；
Second coolant filter 9；Uninterrupted power source 10.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings.Below with reference to
The embodiment that accompanying drawing describes is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward ", " up time
Pin ", " counterclockwise ", " axially ", " radially ", the orientation of the instruction such as " circumferential " or position relationship be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description rather than instruction or imply that the device of indication or element must
Must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two, three
Individual etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " etc.
Term should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be that machinery connects
Connect, it is also possible to be electrical connection or each other can communication；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, permissible
It is connection or the interaction relationship of two elements of two element internals, unless otherwise clear and definite restriction.For this area
For those of ordinary skill, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score permissible
It is that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
Describing refrigeration unit 100 according to embodiments of the present invention below with reference to Fig. 1, refrigeration unit 100 can be used for conditioning chamber
Interior ambient temperature, freezes to indoor environment.
As it is shown in figure 1, refrigeration unit 100 according to embodiments of the present invention, can include forming refrigerant circulation stream extremely
Lack an oil-free centrifugal compressor 1, vaporizer 2, condenser 3, (scheme for the coolant pump housing 4 and control device carrying coolant
Not shown).Alternatively, vaporizer 2 can be falling film evaporator 2 or full liquid vaporizer 2.
Specifically, oil-free centrifugal compressor 1 has air vent (not shown) and gas returning port (not shown), air vent
Can be connected with condenser 3, gas returning port can be connected with vaporizer 2, is connected with restricting element (figure between vaporizer 2 and condenser 3
Not shown) so that the coolant flowing through it is carried out reducing pressure by regulating flow.Thus, the coolant after oil-free centrifugal compressor 1 compression can be from row
QI KOU is discharged, and flows to condenser 3 to carry out heat exchange with outdoor environment, and coolant flows to restricting element subsequently, saves through restricting element
Stream blood pressure lowering after flow to vaporizer 2 with to indoor environment freeze, last coolant is discharged from vaporizer 2, and is returned to through gas returning port
Compressor.Wherein it is desired to explanation, the refrigeration principle of refrigeration unit 100 be as it is known to those skilled in the art that the most
Describe in detail again.
Specifically, oil-free centrifugal compressor 1 includes motor 11, many group bearings 12 and impeller 13, and many group bearings 12 are respectively
Being enclosed within outward on the armature spindle 111 of motor 11 to play the effect supporting armature spindle 111, one of which bearing 12 can provide and axially push away
Power is to play the effect of spacing armature spindle 111, and impeller 13 is located on armature spindle 111 to be driven rotation by armature spindle 111.Such as,
As it is shown in figure 1, oil-free centrifugal compressor 1 includes 11, two groups of bearings 12 of motor and two impellers 13, two impellers 13 are solid respectively
Being scheduled on the two ends of armature spindle 111 and driven rotation by armature spindle 111, two groups of bearings 12 are enclosed within armature spindle 111 outward to divide respectively
Not Zhi Cheng the two ends of armature spindle 111, one of them bearing 12 can provide axial thrust to play the effect of spacing armature spindle 111,
When armature spindle 111 rotates, two impeller 13 high speed rotating can be driven, thus to entering into the gas of oil-free centrifugal compressor 1
Coolant in cylinder is compressed, in order to form the gaseous coolant of High Temperature High Pressure.
Thus, impeller 13 is directly driven to rotate, no realizing armature spindle 111 by being located on armature spindle 111 by impeller 13
But simple in construction, and advantageously reduce the noise of oil-free centrifugal compressor 1, avoid in correlation technique because of armature spindle simultaneously
Use gear drive between 111 and impeller 13 and produce the problem such as gear wear.
Specifically, bearing 12 is oil-free rolling bearing such as oil-free ceramic bearing, and thus, the rigidity of bearing 12 is high, carrying
Ability is strong, can realize the bearing 12 secure support to armature spindle 111.
Control device to be connected with the coolant pump housing 4 and oil-free centrifugal compressor 1 respectively, the entrance 42 of the coolant pump housing 4 and steaming
Sending out device 2 to be connected with at least one in condenser 3, the outlet 41 of the coolant pump housing 4 is corresponding with each bearing 12 with to each bearing
12 provide as the coolant of lubricating fluid, thus, under control of the control means, the coolant pump housing 4 can be made vaporizer 2 and/or
Refrigerant pump in condenser 3 delivers to each bearing 12 so that in the work process of bearing 12, coolant can be as lubricating fluid
To play the effect of lubrication bearing 12, coolant may also operate as the effect to bearing 12 cooling simultaneously.It is understood that coolant
The pump housing 4 while delivering to each bearing 12 by refrigerant pump, it is also possible to improves the pressure of coolant to prevent because coolant gasification is countershaft
Hold the adverse effect that 12 lubrications cause.
Specifically, when the entrance 42 of the coolant pump housing 4 is individually connected with vaporizer 2, can be by vaporizer 2 to each bearing 12
Coolant as lubricating fluid is provided；When the entrance 42 of the coolant pump housing 4 is individually connected with condenser 3, can be by condenser 3 to each
Bearing 12 provides the coolant as lubricating fluid；When the entrance 42 of the coolant pump housing 4 is connected with condenser 3 and vaporizer 2 simultaneously, can
The coolant as lubricating fluid is provided to each bearing 12 by condenser 3 and/or vaporizer 2.
Alternatively, in each bearing 12, it is provided with lubrication stream (not shown), the outlet 41 of the coolant pump housing 4 and lubrication stream
Inflow entrance be connected, each bearing 12 lubrication stream flow export be joined directly together with vaporizer 2, thus, refrigerant pump can be easy to
The coolant of body 4 pumping enters in lubrication stream so that being lubricated each bearing 12, subsequently the coolant in lubrication stream
Vaporizer 2 can be flowed to respectively through corresponding flow export.Certainly, the invention is not restricted to this, in further embodiments, from coolant
The coolant that the outlet 41 of the pump housing 4 is flowed out can directly be sprayed to each bearing 12 so that bearing 12 is lubricated by it, coolant subsequently
Can flow in coolant reservoir such as motor casing from each bearing 12, coolant reservoir such as motor casing can connect with vaporizer 2
So that coolant flows to vaporizer 2.
Refrigeration unit 100 according to embodiments of the present invention, by arranging the coolant pump housing 4 so that the entrance 42 of the coolant pump housing 4
Be connected with at least one in vaporizer 2 and condenser 3, the outlet 41 that simultaneously makes coolant pump into corresponding with each bearing 12 with
Thering is provided the coolant as lubricating fluid to each bearing 12, this not only can play the effect to bearing 12 lubrication to improve bearing 12
Service life, and simple in construction, simplify the control system of refrigeration unit 100, thus reduce the fault of control system
Rate and the cost of oil-free centrifugal compressor 1, and avoid the configuration of replacement bearing unnecessary in correlation technique, avoid simultaneously
Correlation technique uses the bearing mechanical losses that brings of oil lubrication bearing is big, cooling cycle system exists lubricating oil, changes
Hot device heat exchange efficiency is low, need additionally to design the problems such as lubrication oil supply system, cooling system and recovery system, largely
On simplify the pipe-line system of refrigeration unit 100.
In some embodiments of the present invention, oil-free centrifugal compressor 1 includes multiple, multiple oil-free centrifugal compressors 1
Be connected in parallel to each other setting.Further, the outlet 41 of the coolant pump housing 4 can simultaneously with each axle of each oil-free centrifugal compressor 1
Hold 12 corresponding so that providing the coolant as lubricating fluid to each bearing 12.Certainly, the invention is not restricted to this, real at other
Executing in example, the coolant pump housing 4 includes multiple, and multiple coolant pump housings 4 are correspondingly arranged with multiple oil-free centrifugal compressors 1, Mei Geleng
The entrance 42 of matchmaker's pump housing 4 is connected with at least one in vaporizer 2 and condenser 3, and the outlet 41 of each coolant pump housing 4 is with corresponding
Each bearing 12 correspondence of oil-free centrifugal compressor 1 to provide the coolant as lubricating fluid to bearing 12.
According to some embodiments of the present invention, as it is shown in figure 1, vaporizer 2 is by the first refrigerant flow 21 and the coolant pump housing 4
Entrance 42 be connected, condenser 3 is connected with the entrance 42 of the coolant pump housing 4 by the second refrigerant flow 31, the first refrigerant flow 21
Be in series with the control valve 5 with opening and closing function on the second refrigerant flow 31 respectively, two control valves 5 respectively with control device phase
Even, thus, control device and can control the opening and closing of two control valves 5 respectively to control the first refrigerant flow 21 and the second coolant respectively
The break-make of stream 31 is so that the coolant of vaporizer 2 and/or condenser 3 flows to each bearing 12 under the effect of the coolant pump housing 4.
Specifically, as it is shown in figure 1, refrigeration unit 100 includes: common conduit the 421, first pipeline 211 and second pipe
311.First end of common conduit 421 is connected with the entrance 42 of the coolant pump housing 4, the two ends of the first pipeline 211 respectively with vaporizer 2
Being connected with the second end of common conduit 421, the first pipeline 211 and common conduit 421 form the first refrigerant flow 21, second pipe
The two ends of 311 the second end with condenser 3 and common conduit 421 respectively is connected, and second pipe 311 and common conduit 421 form
Second refrigerant flow 31, the most not only simple in construction, and be conducive to simplifying pipe-line system.
It is in series with control valve 5 on first pipeline 211 and second pipe 311 respectively, the first pipeline 211 is in series with towards altogether
Check valve 2111 with pipeline 421 one-way conduction.Such as, the control valve 5 that control device can control on the first pipeline 211 is opened,
Control valve 5 on second pipe 311 is closed, now the coolant pump housing 4 refrigerant pump in vaporizer 2 can be delivered to each bearing 12 with
It is easy to the lubrication to bearing 12；The control valve 5 that control device can control on the first pipeline 211 is closed, the control on second pipe 311
Valve 5 processed is opened, and the refrigerant pump in condenser 3 can be delivered to each bearing 12 to be lubricated bearing 12 by the coolant pump housing 4.Permissible
Being understood by, the control valve 5 that control device can also control on the first pipeline 211 and second pipe 311 is opened simultaneously, so that
Condenser 3 and vaporizer 2 provide the coolant as lubricating fluid to bearing 12 simultaneously.
Owing to the coolant pressure in condenser 3 is higher than the coolant pressure in vaporizer 2, check valve on the first pipeline 211
The setting of 2111 can the control valve 5 on the first pipeline 211 be closed, control valve 5 on second pipe 311 is opened or the first pipeline
Control valve 5 on 211 is opened, control valve 5 on second pipe 311 is closed moment and at the first pipeline 211 and the second pipe
When control valve 5 on road 311 is opened, it is ensured that coolant can only flow to the coolant pump housing 4 from vaporizer 2, to avoid coolant from cold simultaneously
Condenser 3 flows to vaporizer 2.
Certainly, the invention is not restricted to this, in further embodiments, the first refrigerant flow 21 and the second refrigerant flow 31 are
The most there is not common pall in separate refrigerant flow, simple and reliable.Thus, when controlling device, to control first cold
Control valve 5 on matchmaker's stream 21 is opened, and when the control valve 5 on the second refrigerant flow 31 is closed, the coolant pump housing 4 can be by vaporizer 2
Interior refrigerant pump delivers to bearing 12 so that being lubricated each bearing 12；Control on the first refrigerant flow 21 when controlling device
Control valve 5 close, when the control valve 5 on the second refrigerant flow 31 is opened, the coolant pump housing 4 can be by the refrigerant pump in condenser 3
Deliver to bearing 12 so that each bearing 12 is lubricated by coolant.It is understood that control first when controlling device simultaneously
When control valve 5 on refrigerant flow 21 and the second refrigerant flow 31 is opened, the coolant pump housing 4 can be by vaporizer 2 and condenser 3
Refrigerant pump delivers to bearing 12 so that each bearing 12 is lubricated by coolant
Alternatively, control valve 5 can be electromagnetic valve, the most not only simple in construction, and is quick on the draw.
In some embodiments of the invention, the bottom of condenser 3 and/or vaporizer 2 is provided with liquid trap 6, the coolant pump housing 4
Entrance 42 be connected with liquid trap 6.Thus, by arranging liquid trap 6 in the bottom of condenser 3 and/or vaporizer 2, it is ensured that
It is pure liquid refrigerants or the liquid refrigerants containing only a small amount of gaseous coolant that the coolant pump housing 4 is pumped to the coolant of bearing 12, thus has
It is beneficial to ensure the lubricant effect to bearing 12.
Specifically, as it is shown in figure 1, the bottom of condenser 3 and vaporizer 2 is respectively equipped with liquid trap 6, two liquid traps 6 points
Not and being in series with control valve 5 between the coolant pump housing 4, each liquid trap 6 is provided with and controls the liquid level sensor that device is connected, control
Device processed controls the opening and closing of two control valves 5 according to the testing result of liquid level sensor.Specifically, when corresponding with condenser 3
Liquid trap 6 in liquid level sensor detect when the liquid level in liquid trap 6 reaches setting value, control device and can control and condensation
The control valve 5 of device 3 correspondence is opened so that the liquid refrigerants in the liquid trap 6 corresponding with condenser 3 is pumped to by the coolant pump housing 4
Each bearing 12, the liquid level in the liquid level sensor in the liquid trap 6 corresponding with vaporizer 2 detects corresponding liquid trap 6
When reaching setting value, control device can control the control valve 5 corresponding with vaporizer 2 and open so that the coolant pump housing 4 will be with evaporation
Liquid refrigerants in the liquid trap 6 of device 2 correspondence is pumped to each bearing 12.
Alternatively, the liquid in the liquid level sensor the most corresponding with two liquid traps 6 detects two liquid traps 6 respectively
Position is when all reaching setting value, controls one that device can control in two control valves 5 and opens, and another is closed.Or, at other
In embodiment, when the liquid level sensor the most corresponding with two liquid traps 6 detects that the liquid level in two liquid traps 6 all reaches respectively
During to setting value, control device can control simultaneously two control valves 5 open so that the coolant pump housing 4 simultaneously will with vaporizer 2 and
Liquid refrigerants in the liquid trap 6 that condenser 3 is corresponding respectively is pumped to each bearing 12.
According to some embodiments of the present invention, the coolant pump housing 4 is connected with uninterrupted power source 10.Thus, when refrigeration unit 100
During emergency power off, can be by uninterrupted power source 10 to the coolant pump housing 4 temporary power, when the armature spindle of oil-free centrifugal compressor 1
111 during rotation, can make the coolant pump housing 4 refrigerant pump be delivered to bearing 12 to guarantee persistently to have lubricating fluid pair under effect of inertia
Bearing 12 is lubricated cooling, so that it is guaranteed that the safe handling of bearing 12.
In some embodiments of the invention, refrigeration unit 100 also includes that the first coolant being positioned at bearing 12 upstream filters
Device 7.Thus, the coolant to flowing to bearing 12 can be easy to filter, it is ensured that the clean degree of coolant, it is to avoid miscellaneous because existing in coolant
Matter and make the damage of the bearing 12 that coolant causes when lubricating bearing 12.
Specifically, the first coolant filter 7 is two and is connected on respectively at outlet 41 and the entrance 42 of the coolant pump housing 4.
Further, being connected in the coolant pump housing 4 and exporting the first coolant filter 7 at 41 is high accuracy coolant filter, thus, coolant
The first coolant filter 7 can be first passed through before flowing to the coolant pump housing 4 tentatively filter, then go through the coolant pump housing 4, coolant from
After the coolant pump housing 4 flows out, the further fine filtering of high accuracy coolant filter can be passed through and flow to bearing 12, thus ensureing stream
It is pure pure coolant to the coolant of bearing 12.
In some embodiments of the invention, refrigeration unit 100 also includes the cooling stream for cooling down motor 11
Road 8, the entrance point 81 of cooling flowing path 8 connects with condenser 3, and the port of export 82 of cooling flowing path 8 connects with vaporizer 2.Concrete and
Speech, available pressure differential between condenser 3 and vaporizer 2 makes the coolant in condenser 3 flow to cooling flowing path 8 with to motor
11 cool down, and coolant can flow to vaporizer 2 after cooling down motor 11.Such as, cooling flowing path 8 includes motor casing, condenser 3
In coolant can be so that the rotor of motor 11 and armature spindle 111 be cooled down in flow direction motor shell, the coolant after cooling is from motor
Shell flows to vaporizer 2.Thus, not only simple in construction, and be conducive to improving the radiating effect of motor 11, extend making of motor 11
Use the life-span.
Further, as it is shown in figure 1, be in series with the second coolant between the entrance point 81 of cooling flowing path 8 and condenser 3 and filter
Device 9, the coolant flowing into motor 11 can be filtered by the second coolant filter 9, thus improves the dry of the coolant of inflow motor 11
Cleanliness, it is to avoid because causing the damage of motor 11 during to motor 11 cooling and lubricating containing impurity in coolant.
Below with reference to Fig. 1, the structure of the refrigeration unit 100 of one specific embodiment of the present invention is described in detail.
As it is shown in figure 1, the refrigeration unit 100 of the present embodiment includes the oil-free centrifugal compressor forming refrigerant circulation stream
1, vaporizer 2, condenser 3, for carrying the coolant pump housing 4 of coolant, controlling device and cooling flowing path 8.
Specifically, as it is shown in figure 1, the bottom of condenser 3 and vaporizer 2 is respectively equipped with liquid trap 6, on each liquid trap 6
It is provided with and controls the liquid level sensor that device is connected.
Specifically, oil-free centrifugal compressor 1 includes 11, two groups of bearings 12 of motor and two impellers 13, two groups of bearings 12
Being enclosed within the armature spindle 111 of motor 11 outside respectively to play the effect supporting armature spindle 111, one of which bearing 12 can provide axle
To thrust to play the effect of spacing armature spindle 111, two impellers 13 are located on armature spindle 111 and turn to be driven by armature spindle 111
Dynamic.
Controlling device to be connected with the coolant pump housing 4 and oil-free centrifugal compressor 1 respectively, the entrance 42 of the coolant pump housing 4 passes through
First refrigerant flow 21 is connected with the liquid trap 6 of vaporizer 2 and condenser 3 respectively with the second refrigerant flow 31, the first coolant stream
Being in series with the control valve 5 with opening and closing function on road 21 and the second refrigerant flow 31 respectively, two control valves 5 fill with control respectively
Put connected, control device and control the opening and closing of two control valves 5 according to the testing result of liquid level sensor.
The outlet 41 of the coolant pump housing 4 is corresponding with each bearing 12 to provide the coolant as lubricating fluid to each bearing 12.
Specifically, as it is shown in figure 1, refrigeration unit 100 includes: common conduit the 421, first pipeline 211 and second pipe
311.First end of common conduit 421 is connected with the entrance 42 of the coolant pump housing 4, the two ends of the first pipeline 211 respectively with vaporizer 2
Being connected with the second end of common conduit 421, the first pipeline 211 and common conduit 421 form the first refrigerant flow 21, second pipe
The two ends of 311 the second end with condenser 3 and common conduit 421 respectively is connected, and second pipe 311 and common conduit 421 form
Second refrigerant flow 31, above-mentioned two control valve 5 is connected on the first pipeline 211 and second pipe 311 respectively, simultaneously the first pipe
The check valve 2111 towards common conduit 421 one-way conduction it is in series with on road 211.
Cooling flowing path 8 is for cooling down motor 11, and the entrance point 81 of cooling flowing path 8 is with the liquid trap 6 of condenser 3 even
Logical, the port of export 82 of cooling flowing path 8 connects with vaporizer 2.
Specifically, the liquid level in the liquid level sensor in the liquid trap 6 of condenser 3 detects this liquid trap 6 reaches
During setting value, the control valve 5 that control device can control on second pipe 311 is opened, and controls the control valve 5 on the first pipeline 211
Close, when the liquid level in the liquid level sensor in the liquid trap 6 of vaporizer 2 detects this liquid trap 6 reaches setting value, control
The control valve 5 that device can control on the first pipeline 211 is opened, and the control valve 5 on second pipe 311 is closed, when two liquid traps 6
Interior liquid level sensor detects when the liquid level in two liquid traps 6 all reaches setting value respectively, controls device and can control first
Control valve 5 in one of them of pipeline 211 and second pipe 311 is opened, and controls the first pipeline 211 and second pipe 311
Control valve 5 on another is closed, in order to the coolant pump housing 4 by refrigerant pump to each bearing 12, from the outlet 41 of the coolant pump housing 4
The coolant flowed out can directly be sprayed to each bearing 12 so that bearing 12 is lubricated by it, and coolant can be from each bearing 12 subsequently
Flow direction motor shell.Meanwhile, the coolant flow direction cooling in utilizing the pressure differential between condenser 3 and vaporizer 2 can make condenser 3
Stream 8 with in flow direction motor shell so that the rotor of motor 11 and armature spindle 111 are cooled down, the coolant after cooling can with lubrication axle
The coolant holding 12 flows to vaporizer 2 from motor casing together.
Specifically, as it is shown in figure 1, be in series with the second coolant filter between the entrance point 81 of cooling flowing path 8 and condenser 3
9, the coolant flowing into motor 11 can be filtered by the second coolant filter 9, thus improves the clean of the coolant of inflow motor 11
Degree, it is to avoid because causing the damage of motor 11 during to motor 11 cooling and lubricating containing impurity in coolant.
Specifically, as it is shown in figure 1, two the first coolant filters 7 are connected on outlet 41 and the entrance of the coolant pump housing 4 respectively
42 sentence the coolant to flowing to bearing 12 filters.
The coolant pump housing 4 is connected with uninterrupted power source 10.Thus, when refrigeration unit 100 emergency power off, can be by uninterrupted
Power supply 10 is to the coolant pump housing 4 temporary power, when rotating under the armature spindle 111 of oil-free centrifugal compressor 1 is at effect of inertia, and can
The coolant pump housing 4 is made refrigerant pump to be delivered to bearing 12 to guarantee persistently to have lubricating fluid that bearing 12 is lubricated cooling.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
One or more embodiments or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification.
Claims (10)
1. a refrigeration unit, it is characterised in that include form the oil-free centrifugal compressor of refrigerant circulation stream, vaporizer and
Condenser, described oil-free centrifugal compressor includes motor, many group bearings and impeller, described many group bearings respectively outer be enclosed within described
On the armature spindle of motor, described impeller is located on described armature spindle and rotates to be driven by described armature spindle；Described refrigeration unit is also
Including:
For carrying the coolant pump housing of coolant, the outlet of the described coolant pump housing is corresponding with each described bearing with to each described axle
Hold and the coolant as lubricating fluid is provided, the entrance of the described coolant pump housing and at least one in described vaporizer and described condenser
It is connected；
Controlling device, described control device is connected with the described coolant pump housing and described oil-free centrifugal compressor respectively.
Refrigeration unit the most according to claim 1, it is characterised in that described vaporizer passes through the first refrigerant flow with described
The entrance of the coolant pump housing is connected, and described condenser is connected with the entrance of the described coolant pump housing by the second refrigerant flow, and described the
Being in series with the control valve with opening and closing function on one refrigerant flow and described second refrigerant flow respectively, two described control valves are divided
It is not connected with described control device.
Refrigeration unit the most according to claim 2, it is characterised in that including:
Common conduit, the first end of described common conduit is connected with the entrance of the described coolant pump housing；
First pipeline, the two ends of described first pipeline the second end with described vaporizer and described common conduit respectively is connected, institute
State the first pipeline and described common conduit forms described first refrigerant flow；
Second pipe, the two ends of described second pipe the second end with described condenser and described common conduit respectively is connected, institute
State second pipe and described common conduit forms described second refrigerant flow, on described first pipeline and described second pipe respectively
It is in series with described control valve, described first pipeline is in series with the check valve towards described common conduit one-way conduction.
4. according to the refrigeration unit according to any one of claim 1-3, it is characterised in that described condenser and/or described steaming
The bottom sending out device is provided with liquid trap, and the entrance of the described coolant pump housing is connected with described liquid trap.
Refrigeration unit the most according to claim 4, it is characterised in that the bottom of described condenser and described vaporizer is respectively
Being provided with described liquid trap, two described liquid traps respectively and are in series with described control valve between the described coolant pump housing,
Each described liquid trap is provided with the liquid level sensor being connected with described control device, and described control device is according to described liquid
The testing result of level sensor controls the opening and closing of two described control valves.
Refrigeration unit the most according to claim 1, it is characterised in that the described coolant pump housing is connected with uninterrupted power source.
Refrigeration unit the most according to claim 1, it is characterised in that also include the first coolant being positioned at described bearing upstream
Filter.
Refrigeration unit the most according to claim 7, it is characterised in that described first coolant filter is two and goes here and there respectively
It is associated in outlet and the porch of the described coolant pump housing.
Refrigeration unit the most according to claim 1, it is characterised in that also include the cooling stream for motor is cooled down
Road, the entrance point of described cooling flowing path connects with described condenser, and the port of export of described cooling flowing path connects with described vaporizer.
Refrigeration unit the most according to claim 9, it is characterised in that the entrance point of described cooling flowing path and described condensation
The second coolant filter it is in series with between device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610406908.1A CN106091188A (en) | 2016-06-12 | 2016-06-12 | Refrigeration unit |
| PCT/CN2017/087348 WO2017215493A1 (en) | 2016-06-12 | 2017-06-06 | Refrigerating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610406908.1A CN106091188A (en) | 2016-06-12 | 2016-06-12 | Refrigeration unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106091188A true CN106091188A (en) | 2016-11-09 |
Family
ID=57227821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610406908.1A Pending CN106091188A (en) | 2016-06-12 | 2016-06-12 | Refrigeration unit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106091188A (en) |
| WO (1) | WO2017215493A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017215493A1 (en) * | 2016-06-12 | 2017-12-21 | 重庆美的通用制冷设备有限公司 | Refrigerating unit |
| CN110411045A (en) * | 2019-07-31 | 2019-11-05 | 珠海格力电器股份有限公司 | Centrifugal unit and air conditioning system |
| CN110914545A (en) * | 2017-07-28 | 2020-03-24 | 开利公司 | Lubrication supply system |
| CN111102695A (en) * | 2019-12-18 | 2020-05-05 | 珠海格力电器股份有限公司 | Refrigerant pump control method and device and air conditioning unit |
| CN111365910A (en) * | 2018-12-26 | 2020-07-03 | 珠海格力电器股份有限公司 | Refrigerant circulation system with switchable liquid taking positions and refrigeration equipment |
| CN113847345A (en) * | 2021-09-08 | 2021-12-28 | 青岛海尔空调电子有限公司 | Air supply system and refrigerating system for suspension bearing |
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| EP3745049B1 (en) | 2019-05-29 | 2024-02-07 | Carrier Corporation | Refrigeration apparatus |
| CN113137773A (en) * | 2021-03-04 | 2021-07-20 | 青岛海尔空调电子有限公司 | Double-power heat pump refrigerating unit |
| CN114198920B (en) * | 2021-11-22 | 2023-11-24 | 青岛海尔空调电子有限公司 | Method and device for controlling refrigerant circulation system and refrigerant circulation system |
| CN115235132A (en) * | 2022-09-21 | 2022-10-25 | 山东天瑞重工有限公司 | Magnetic suspension water chilling unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017215493A1 (en) * | 2016-06-12 | 2017-12-21 | 重庆美的通用制冷设备有限公司 | Refrigerating unit |
| CN110914545A (en) * | 2017-07-28 | 2020-03-24 | 开利公司 | Lubrication supply system |
| US11306950B2 (en) | 2017-07-28 | 2022-04-19 | Carrier Corporation | Lubrication supply system |
| CN111365910A (en) * | 2018-12-26 | 2020-07-03 | 珠海格力电器股份有限公司 | Refrigerant circulation system with switchable liquid taking positions and refrigeration equipment |
| CN110411045A (en) * | 2019-07-31 | 2019-11-05 | 珠海格力电器股份有限公司 | Centrifugal unit and air conditioning system |
| CN111102695A (en) * | 2019-12-18 | 2020-05-05 | 珠海格力电器股份有限公司 | Refrigerant pump control method and device and air conditioning unit |
| CN113847345A (en) * | 2021-09-08 | 2021-12-28 | 青岛海尔空调电子有限公司 | Air supply system and refrigerating system for suspension bearing |
| CN113847345B (en) * | 2021-09-08 | 2024-02-23 | 青岛海尔空调电子有限公司 | Air supply system and refrigerating system for suspension bearing |
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| Publication number | Publication date |
|---|---|
| WO2017215493A1 (en) | 2017-12-21 |
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Application publication date: 20161109 |