EP3440359B1 - Kältemittelverdichtereinheit - Google Patents

Kältemittelverdichtereinheit Download PDF

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Publication number
EP3440359B1
EP3440359B1 EP16714896.4A EP16714896A EP3440359B1 EP 3440359 B1 EP3440359 B1 EP 3440359B1 EP 16714896 A EP16714896 A EP 16714896A EP 3440359 B1 EP3440359 B1 EP 3440359B1
Authority
EP
European Patent Office
Prior art keywords
lubricant
refrigerant compressor
compressor unit
supply
lubricant supply
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16714896.4A
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German (de)
English (en)
French (fr)
Other versions
EP3440359A1 (de
Inventor
Tihomir Mikulic
Klaus Feller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bitzer Kuehlmaschinenbau GmbH and Co KG
Original Assignee
Bitzer Kuehlmaschinenbau GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Publication of EP3440359A1 publication Critical patent/EP3440359A1/de
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Publication of EP3440359B1 publication Critical patent/EP3440359B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/028—Means for improving or restricting lubricant flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02—Lubrication
    • F04B39/0207—Lubrication with lubrication control systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02—Lubrication
    • F04B39/0223—Lubrication characterised by the compressor type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02—Lubrication
    • F04B39/0284—Constructional details, e.g. reservoirs in the casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/121—Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/28—Safety arrangements; Monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/81—Sensor, e.g. electronic sensor for control or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/20—Flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/24—Level of liquid, e.g. lubricant or cooling liquid

Definitions

  • the invention relates to a refrigerant compressor unit, comprising a compressor housing and at least one compressor element arranged in the compressor housing and movable by bearing and drive parts and working in at least one compressor chamber, at least one lubricant supply point arranged in the compressor housing for at least one of the bearing and drive parts and / or compressor elements and a lubricant inlet to the at least one lubricant supply point.
  • Such refrigerant compressors are from the U.S. 6,116,046 A and the U.S. 6,125,642 A known.
  • the lubricant supply is usually monitored via lubricant flow sensors, which result in a pressure drop in the lubricant supply.
  • the invention is therefore based on the object of improving a refrigerant compressor unit of the type described at the beginning in such a way that an optimal lubricant supply is possible and an optimal response to a lubricant interruption is possible.
  • the lubricant inlet has a lubricant storage space through which lubricant flows and in which a lubricant presence sensor is arranged to detect the presence of lubricant in the lubricant storage space.
  • the advantage of the solution according to the invention is that, with this solution, the lubricant is not detected by a pressure drop, but by the presence of lubricant in the lubricant storage space, so that the lubricant supply can be optimally designed and, in particular, a pressure drop is not required to detect the lubricant supply is and does not occur.
  • the lubricant presence sensor could, for example, be a sensor that is cooled when lubricant is present and heats up when there is no lubricant presence, thereby creating the possibility of detecting the lubricant presence.
  • the lubricant presence sensor is an optical sensor.
  • the optical lubricant presence sensor is designed in such a way that it is arranged adjacent to the lubricant storage space with a sensor surface that detects the presence of lubricant.
  • the lubricant storage space forms a throttle-free section in relation to the remaining flow sections of the lubricant inlet and, for example, has a widened cross section relative to the remaining flow sections of the lubricant inlet.
  • the lubricant inlet With regard to the design of the lubricant inlet, it has proven to be particularly advantageous if it stores a lubricant volume located above the lubricant supply point in relation to the direction of gravity, i.e. is dimensioned so voluminously that it is able to store said lubricant volume.
  • the lubricant storage space accommodates at least part of the lubricant volume to be stored.
  • the lubricant volume of the lubricant inlet is at least so large that when the drive of the refrigerant compressor unit is switched off until the refrigerant compressor unit comes to a standstill, a lubricant supply to the lubricant supply point is guaranteed without further lubricant supply.
  • a lubricant drain to run from the lubricant supply point to the at least one compressor chamber of the compressor housing.
  • Such a lubricant drain is also particularly necessary if the lubricant supply point is not only to be permanently adequately lubricated, but also to be permanently adequately cooled by the lubricant.
  • the lubricant drain has a lubricant storage space for receiving lubricant, so that the lubricant drain is also able to store lubricant.
  • the lubricant drain stores a lubricant volume located above the lubricant supply point in relation to the direction of gravity, which is optionally available to supply the lubricant supply point in the event of an interruption in the lubricant supply.
  • the lubricant storage space accommodates at least part of the lubricant volume to be stored.
  • the lubricant volume of the lubricant drain is at least so large that when the drive of the refrigerant compressor unit is switched off until the refrigerant compressor unit comes to a standstill, a lubricant supply to the lubricant supply point is guaranteed without further lubricant supply.
  • the volume of lubricant is at least so large that at least until the refrigerant compressor unit starts up again, a lubricant supply to the lubricant supply point is guaranteed without any further lubricant supply.
  • a particularly favorable solution provides that the lubricant volume of the lubricant inlet and the lubricant outlet together is at least so large that when the drive of the refrigerant compressor unit is switched off until the refrigerant compressor unit comes to a standstill, a lubricant supply to the lubricant supply point is guaranteed without further lubricant supply.
  • the lubricant volume of the lubricant inlet and the lubricant outlet is jointly at least large enough to ensure a lubricant supply to the lubricant supply point without further lubricant supply at least until the refrigerant compressor unit starts up again.
  • the lubricant feed could be implemented by a separate line system arranged in the compressor housing.
  • the lubricant inlet is arranged in an integrated manner in the compressor housing, that is to say is implemented by channels and volumes integrated in the compressor housing.
  • the lubricant inlet is arranged in a wall area of the compressor housing that has the lubricant supply point.
  • the lubricant drain is arranged in an integrated manner in the compressor housing.
  • the lubricant drain is arranged in an integrated manner in the compressor housing.
  • the lubricant drain is arranged in the wall area of the compressor housing that receives the lubricant supply point.
  • a particularly favorable solution provides that the lubricant inlet is connected to a lubricant connection provided on the compressor housing and fed by a lubricant supply system and extends from the lubricant connection to the at least one lubricant supply point.
  • the lubricant supply point is present on at least one of the following elements such as: a shaft sealing unit, a bearing unit, the compressor element operating in the compression chamber and a slide unit.
  • a throttle element is provided in the lubricant inlet.
  • lubricant presence sensor is connected to a lubricant monitoring system which switches off a drive of the refrigerant compressor unit when the lubricant supply is detected by the presence sensor.
  • a particularly simple solution provides that the lubricant monitoring switches off the motor for driving the refrigerant compressor unit in the event of an interruption in the lubricant supply detected by the presence sensor.
  • FIG. 1 The refrigerant circuit shown and denoted as a whole by 10 is provided with a refrigerant compressor unit denoted as a whole by 12, which is driven by a motor 14.
  • the refrigerant compressor unit 12 compresses refrigerant supplied at a suction connection 22 and releases it at a pressure connection 24 in the compressed state, the refrigerant in the refrigerant circuit 10 subsequently being supplied to the pressure connection 24 of a heat exchanger unit 26 in which heat W is given off by the compressed refrigerant he follows.
  • the refrigerant After flowing through the heat exchanger unit 32, the refrigerant is supplied to the suction connection 22 for compressing it in the refrigerant compressor unit 12.
  • a lubricant separator 34 designated as a whole is provided, which separates lubricant carried along from the compressed refrigerant exiting from the refrigerant compressor unit 12 via the pressure connection 24.
  • the lubricant separated by the lubricant separator 34 is in turn supplied by a lubricant supply system 40 to the refrigerant compressor unit 12 for lubrication of the same.
  • the lubricant supply system 40 comprises a lubricant cooler 42, which cools the lubricant coming from the lubricant separator 34, and subsequently a lubricant filter 44 for filtering the lubricant and a valve 46 for controlling the flow of lubricant in the lubricant supply system 40.
  • the lubricant is supplied by the lubricant supply system 40 to a compressor housing 52 of the refrigerant compressor unit 12 via a lubricant connection 54 and distributed within the compressor housing 52.
  • two compressor elements 62a, 62b are provided in the compressor housing 52, which are each arranged in compressor chambers 64a, 64b, for example designed as screw rotor bores 64a, 64b assigned to these screw rotors.
  • the intermeshing screw rotors 62a, 62b are in turn rotatably mounted in the compressor housing by means of screw rotor shafts 66a, 66b, the screw rotor shafts 66a, 66b being rotatably mounted in the compressor housing 52 on the one hand in bearings 68a, 68b on the suction side and on the other hand in bearings 72a, 72b on the pressure side.
  • the screw rotors 62a, 62b are driven via at least one drive shaft 74 which is led to one of the screw rotor shafts 66 and which is connected on the one hand to the screw rotor shaft 66 and on the other hand is led out of the compressor housing 52 in order to be driven by the motor 14.
  • the drive shaft 74 is led out of the compressor housing 52 through a housing opening 76 and in the area of the housing opening 76 a shaft sealing unit 78 is provided for sealing between the drive shaft 74 and the housing opening 76, which prevents refrigerant from escaping from a refrigerant-carrying interior 56 of the compressor housing 52 .
  • the shaft sealing unit 78 comprises, for example, an outer sealing element 82, an inner sealing element 84 and a shaft seal 86 lying between the outer sealing element 82 and the inner sealing element 84, the outer sealing element 82 and the inner sealing element 84 serving to create a lubricant space between them, in which the shaft seal 86 is arranged and is thus constantly supplied with lubricant.
  • a lubricant supply space 92 for the shaft seal is preferably created between the outer sealing element 82 and the shaft seal 86 and a lubricant discharge space 94 between the inner sealing element 84 and the shaft seal 86, so that the lubricant for the shaft seal 86 can enter and exit the shaft seal 86 from the lubricant supply space 92 this can exit into the lubricant discharge space 94.
  • a multiplicity of lubricant supply points is provided in the compressor housing 52.
  • the shaft sealing unit 78 is a lubricant supply point.
  • suction-side bearings 68a and 68b are a further lubricant supply point, the lubricant under the outlet side pressure of the refrigerant compressor unit serving to operate cylinder arrangements for moving control elements.
  • the pressure-side bearings 72a and 72b are also a lubricant supply point.
  • Another lubricant supply point are, for example, the screw rotors 62a and 62b running in the screw rotor bores 64a and 64b.
  • slide units 102 for controlling the power are a further lubricant supply point, with the lubricant under the outlet pressure of the refrigerant compressor unit in particular serving to operate control elements, such as cylinder arrangements working with the pressurized lubricant.
  • All of these lubricant supply points are lubricated via the lubricant supplied to the lubricant connection 54.
  • the supply of lubricant to the individual lubricant supply points in the compressor housing 52 takes place on the basis of the pressure difference between the lubricant connection 54 and the pressure present at the individual lubricant supply points, which is lower than the pressure in the lubricant supply system 40.
  • connection chamber 112 is provided in the compressor housing 52 following the lubricant connection 54.
  • connection chamber 112 is preferably above all lubricant supply points of the compressor housing 52 in relation to the direction of gravity.
  • a first lubricant inlet 114 extends to the lubricant supply space 92 of the shaft sealing unit 78, wherein in the first lubricant inlet 114, as for example in FIG Fig. 2 and 3 shown, a lubricant storage space 116 through which lubricant flows is arranged.
  • the lubricant storage space 116 lies above the shaft sealing unit 78 in relation to the direction of gravity.
  • a lubricant presence sensor 122 is assigned to a lubricant monitor 120, which sensor detects the presence of lubricant in the lubricant storage space 116, for example, optically.
  • the lubricant presence sensor 122 is arranged in the lubricant storage space 116 and is provided with a prism 124 facing the lubricant in the lubricant storage space 116, this prism 124 in the case in which it adjoins the lubricant in the lubricant storage space 116, reflecting the incident light differently than in the case that there is no lubricant in the lubricant storage space 116 and thus the prism 124 does not adjoin the lubricant.
  • reflection properties of the prism 124 are detected by a light source arranged in the lubricant presence sensor 122 and a corresponding detector for the reflected light.
  • the lubricant presence sensor 122 is arranged in the lubricant storage space 116, in particular, in such a way that it is arranged laterally offset to an inlet opening 126 and an outlet opening 128 of the lubricant storage space 116, so that the lubricant presence sensor 122 is laterally offset to a one running directly from the inlet opening 126 to the outlet opening 128
  • Lubricant flow 132 is arranged through the lubricant storage space 116 and thus does not hinder the lubricant flow 132 and, as a result, the lubricant presence sensor 122 does not limit the lubricant flow 132 and thus no pressure drop occurs.
  • the lubricant presence sensor 122 coupled to the lubricant monitor 120 informs the lubricant monitor 120 whether or not lubricant is present in the lubricant storage space 116, and if there is no lubricant in the lubricant storage space 116, the lubricant monitor 120 switches off the motor 14 and thus the drive of the refrigerant compressor unit 12.
  • the lubricant inlet 114 is designed, for example, in such a way that a channel section 134 runs from the connection chamber 112 to the inlet opening 126 and a channel section 136 runs from the outlet opening 128 to the lubricant supply space 92 of the shaft sealing unit 78, the channel sections 134 and 136 preferably having a flow cross-section which is smaller than the flow cross-section available to the lubricant in the lubricant storage space 116.
  • the lubricant presence sensor 122 As an alternative to designing the lubricant presence sensor 122 as an optical sensor, it is also conceivable to design it in the form of a heated thermocouple, which is cooled by contact with the lubricant and thus does not heat up significantly, but heats up when there is insufficient contact with the lubricant, with this heating is detected and thus the lack of presence of lubricant is detected.
  • the lubricant passes through the shaft seal 86 and flows from the lubricant discharge space 94 via a lubricant drain designated as a whole as 142 and via its mouth opening 146 into the compressor chambers 64a and 64b on the suction side, so that the lubricant is then able to enter the Compressor chambers 64a and 64b operating compressor elements 62a and 62b to lubricate.
  • a lubricant storage space 144 is also provided in the lubricant drain 142, which is also arranged above the shaft sealing unit 78 in relation to the direction of gravity.
  • the lubricant inlet 114 runs from the connection chamber 112, which is above the shaft sealing unit 78 in relation to the direction of gravity, to the shaft sealing unit 78, and because at least the lubricant storage space 144 in the lubricant outlet 142 is above the shaft sealing unit 78 in relation to the direction of gravity, there are both in the lubricant inlet 114 as well as in the lubricant drain 142, lubricant volumes are available which, due to the force of gravity, are able to supply lubricant to the shaft sealing unit 78.
  • the lubricant inlet 114 and the lubricant outlet 142 are preferably integrated into the compressor housing 52, in particular arranged in an integrated manner in a housing wall area 148.
  • the lubricant volume of the lubricant in the lubricant inlet 114 and in the lubricant outlet 142 based on the direction of gravity above the shaft sealing unit 78 is preferably so large that both when the lubricant supply is interrupted due to the switching off of the motor 14 and when the motor 14 is switched off due to the lubricant presence sensor 122 ascertained lack of lubricant presence in the lubricant inlet 114, sufficient lubrication of the shaft sealing unit 78 is always guaranteed until the refrigerant compressor unit 12 comes to a standstill and / or until the refrigerant compressor unit 12 starts up again.
  • the lubricant supply points in addition to the shaft sealing unit 78, formed for example by the suction-side bearings 68, the pressure-side bearings 72, the compressor elements 62 operating in the compression chambers 64 and the slide units 102, are less sensitive to interruption of the lubricant flow, so that a second lubricant inlet 152 to these lubricant supply points is not monitored by a lubricant presence sensor 122, but it is assumed that if the lubricant presence sensor 122 does not detect any lubricant and triggers a shutdown of the drive of the refrigerant compressor unit 12, no more lubricant is supplied to the lubricant inlet 152 either, however the lubricant volume present in the lubricant inlet 152 running over the lubricant supply points in relation to the direction of gravity, still for the lubricant when the lubricant supply is interrupted g of the lubricant supply points supplied by this is sufficient,
  • the lubricant supply point formed by the shaft sealing unit 78 in particular in the case of the lubricant supply point formed by the shaft sealing unit 78, and possibly also in the case of the other lubricant supply points, not only these lubricant supply points are lubricated, but rather also a cooling of the element forming the respective lubricant supply point, so that damage to the respective element is avoided and a maximum temperature can also be maintained at the respective lubricant supply point.
  • shaft sealing unit 78 In the case of shaft sealing unit 78 in particular, it is necessary to cool it by means of a significant flow of lubricant.
  • throttle elements 162 and 164 are provided, for example, in the lubricant inlet 114 and / or in the lubricant outlet 142, which, given the pressure difference that usually exists between the lubricant connection 54 and in this case the orifice 146, the lubricant flow on the for sufficient cooling maintain the intended level.
  • the provision of the throttle element 164 in the lubricant outlet 142 has the particular advantage that the lubricant storage space 144 is only emptied with a delay when the refrigerant compressor unit 12 starts up and suction pressure occurs at the orifice 146 if the throttle element 164 is arranged between the lubricant storage space 144 and the orifice 146.
  • the motor 14' is arranged in a motor housing 172, which is connected to the compressor housing 52 'in a refrigerant-tight manner, and in particular an interior 174 of the motor housing is flowed through by refrigerant, for example to cool the motor 14' .
  • the second lubricant inlet 152 following the connection chamber 112, is assigned the lubricant storage space 116 ′, in which lubricant supplied collects.
  • the presence of the lubricant in the lubricant storage space 116 ' is monitored by the lubricant presence sensor 122, the lubricant presence sensor 122 being designed and operating in the same way as, for example, the lubricant presence sensor 122 of the first exemplary embodiment.
  • the lubricant flow through the second lubricant supply 152 is also monitored by the lubricant presence sensor 122 and an interruption of the lubricant supply is detected, so that the lubricant monitoring 120 is able to switch off the motor 14 'in the event of an interruption of the lubricant supply in order to avoid damage to the lubricant supply 152 to prevent supplied lubricant supply points.
  • the second exemplary embodiment functions in the same way as the first exemplary embodiment and the same reference symbols are used for the same elements, so that with regard to the description of all these elements, reference can be made in full to the explanations relating to the first exemplary embodiment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
EP16714896.4A 2016-04-06 2016-04-06 Kältemittelverdichtereinheit Active EP3440359B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/057533 WO2017174129A1 (de) 2016-04-06 2016-04-06 Kältemittelverdichtereinheit

Publications (2)

Publication Number Publication Date
EP3440359A1 EP3440359A1 (de) 2019-02-13
EP3440359B1 true EP3440359B1 (de) 2020-10-07

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EP16714896.4A Active EP3440359B1 (de) 2016-04-06 2016-04-06 Kältemittelverdichtereinheit

Country Status (5)

Country Link
US (1) US11542945B2 (zh)
EP (1) EP3440359B1 (zh)
CN (1) CN109072921B (zh)
RU (1) RU2716948C1 (zh)
WO (1) WO2017174129A1 (zh)

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Publication number Priority date Publication date Assignee Title
EP3508729A1 (de) * 2018-01-08 2019-07-10 Kaeser Kompressoren SE Kompressor mit absaugleitung und verfahren zur steuerung eines kompressores
WO2021084996A1 (ja) * 2019-10-31 2021-05-06 株式会社日立産機システム 圧縮機本体及び圧縮機
FR3133650B1 (fr) * 2022-03-21 2024-03-01 Pfeiffer Vacuum Pompe à vide

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CN109072921B (zh) 2021-03-26
US11542945B2 (en) 2023-01-03
EP3440359A1 (de) 2019-02-13
CN109072921A (zh) 2018-12-21
US20190032666A1 (en) 2019-01-31
WO2017174129A1 (de) 2017-10-12
RU2716948C1 (ru) 2020-03-17

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