EP3692309A1 - Système de compresseur frigorifique - Google Patents

Système de compresseur frigorifique

Info

Publication number
EP3692309A1
EP3692309A1 EP17780712.0A EP17780712A EP3692309A1 EP 3692309 A1 EP3692309 A1 EP 3692309A1 EP 17780712 A EP17780712 A EP 17780712A EP 3692309 A1 EP3692309 A1 EP 3692309A1
Authority
EP
European Patent Office
Prior art keywords
refrigerant
interior
refrigerant compressor
housing
control housing
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.)
Pending
Application number
EP17780712.0A
Other languages
German (de)
English (en)
Inventor
Florian BERNHARDT
Jan Revellin
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.)
Filing date
Publication date
Application filed by Bitzer Kuehlmaschinenbau GmbH and Co KG filed Critical Bitzer Kuehlmaschinenbau GmbH and Co KG
Publication of EP3692309A1 publication Critical patent/EP3692309A1/fr
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
    • 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
    • F25B31/02—Compressor arrangements of motor-compressor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/20—Electric components for separate outdoor units
    • F24F1/24—Cooling of electric components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/02—System or Device comprising a heat pump as a subsystem, e.g. combined with humidification/dehumidification, heating, natural energy or with hybrid system
    • F24F2203/021—Compression cycle
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/12—Inflammable refrigerants
    • 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
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/222—Detecting refrigerant leaks

Definitions

  • the invention relates to a refrigerant compressor system, comprising a refrigerant compressor and an electric drive motor for driving the refrigerant compressor and a control electronics arranged in an interior of a control housing control electronics for driving the electronic drive motor having electrical components or electronic power components.
  • An electronic control system can be a simple motor protection device, which monitors, for example, a temperature of the drive motor and switches off the drive motor at too high a temperature.
  • the invention is therefore based on the object to improve the safety of such a refrigerant compressor system.
  • Control housing is provided not impairing refrigerant discharge, which causes leakage of refrigerant entering through the refrigerant leakage into the interior of the interior space in an environment of the refrigerant compressor plant.
  • the at least one protection criterion of the control housing is dust-tight, which means that the control housing prevents the ingress of dust into the interior.
  • another protection criterion is tightness of the control housing with respect to from outside thereof into the interior space
  • the solution according to the invention proves to be particularly advantageous if refrigerant-carrying components are provided in the control housing or the control housing is directly adjacent to refrigerant-carrying components.
  • an advantageous solution provides that the refrigerant discharge opens into a space region of the interior, in which the refrigerant accumulates due to gravity.
  • the refrigerant discharge is associated with the upper space portion and opens into it.
  • the spatial area of the interior is a gravitationally low-lying spatial area of the same, to which the refrigerant outlet is assigned, which thus opens into it.
  • housing parts of the control housing to maintain the associated protection criteria are tightly connected with respect to condensed liquids and dustproof, so that in the region of the connection of the housing parts together no significant gas flow can form and also no dust can pass ,
  • the refrigerant outlet of the control housing has a filter element, through which passes refrigerant propagating in the interior.
  • the filter element of the refrigerant discharge is designed so that it allows gas passage, but prevents the passage of dust particles, so that the at least one protection criterion can be maintained by the refrigerant discharge, the one against
  • the filter element also protects against the ingress of liquids into the interior.
  • the filter element allows condensed water to escape from the interior.
  • the filter element is expediently semipermeable, that is to say it allows condensed liquids to escape from the interior, but not dust to enter the interior.
  • the filter element it would be conceivable, for example, to form it in the form of a filter mat or a filter membrane.
  • the filter element is preferably designed so that it filters out particles that are larger than 100 pm, even better filters out particles that are larger than 50 pm.
  • the filter element is designed as a sintered body, which is a rigid in itself and thus in the refrigerant discharge easily fixable body.
  • Control housing a refrigerant-operated cooling unit is arranged for the control electronics.
  • Such refrigerant-carrying components are, for example, components of a control cooling branch, such as connecting lines, on-off valves, control valves, temperature sensors and throttles.
  • Control housing opening electrical line feedthroughs is provided so that in particular in the field of electrical cable feedthroughs or sensors or control valves, the risk of leakage occurs.
  • the invention relates to a refrigeration system, comprising a refrigerant compressor system according to one of the preceding features, wherein according to the invention the refrigerant compressor system in a closed or unfinished, in particular open in all directions,
  • Plant space is arranged, in which a monitoring takes place with regard to escaping refrigerant.
  • Such monitoring with respect to escaping refrigerant takes place, for example, in the case of an unfinished room by a
  • a refrigerant leak warning device is assigned to the system space and if the refrigerant leakage warning device measures the system space, in particular a closed refrigerant tank
  • the refrigerant warning device generates a warning signal when a safety-relevant refrigerant concentration in the system room is exceeded, which may be, for example, an optical or an acoustic, electronic or transmitted via a data transmission warning signal.
  • Fig. 1 is a schematic representation of a first embodiment of a refrigerant compressor plant according to the invention
  • FIG. 2 shows an illustration of a real embodiment of the refrigerant compressor system according to the invention
  • Fig. 3 is a section along line 3-3 in Fig. 2;
  • FIG. 4 shows a partial enlargement of a region A in FIG. 3;
  • Fig. 5 is a schematic representation of a refrigerant compressor plant according to the invention as a component of a refrigeration system arranged in a plant room and
  • Fig. 6 is a longitudinal section through a second embodiment of a
  • refrigerant compressor according to the invention.
  • refrigerant circuit is designated as a whole by 30 refrigerant compressor system comprising a refrigerant compressor 32, the compressed refrigerant emits at an output terminal AA, which in turn via a first connecting line 12 with a High-pressure side heat exchanger unit 14 is connected, in which a cooling, for example, a liquefaction of the high-pressure refrigerant is carried out.
  • This cooled, for example, liquefied refrigerant is designated as a whole by 18 via a second connecting line 16
  • An expansion element is supplied, in which an expansion of the high-pressure and cooled by the high-pressure side heat exchanger 14 refrigerant takes place, which subsequently enters a low-pressure side heat exchanger 22, in which this is due to its expansion in the expansion member 18 by cooling in a position capable of heat
  • the refrigerant leaving the low-pressure-side heat exchanger unit 22 is then supplied via an additional connecting line 24 to an input connection AE of the refrigerant compressor 32.
  • the refrigerant compressor 32 is preferably driven by an electric motor 34, wherein in particular the refrigerant compressor 32 and the
  • Electric motor 34 are arranged in an overall housing 36, as shown in FIG. 2, which on the one hand has a compressor housing 42 for receiving the refrigerant compressor 32 and on the other hand, a motor housing 44 for receiving the electric drive motor 34, which are connected to each other.
  • the drive motor 34 is preferably controlled by a motor controller 52 speed-controlled, the motor controller 52 an electronic
  • Speed control 54 in particular comprises a frequency converter, the highly temperature-loaded electronic power components 56 which show a high heat development during operation of the electric drive motor 34 with the motor controller 52 and in particular have too short a high lifetime during operation of the electric drive motor 34.
  • a heat sink 62 is provided for the cooling of the electronic power components, to which the heavily loaded electronics
  • the heat sink 62 is active in the refrigerant circuit 10
  • cooled refrigerant and has for this purpose an input terminal 64 and an output terminal 66, wherein from the input terminal 64, a refrigerant leading cooling channel 68 to the heat sink 62 to
  • Output terminal 66 interspersed.
  • the heat sink 62 is part of a control cooling branch, designated as a whole by 70, which comprises a branch line 72 which branches off the refrigerant from the second connection line 16 and supplies it to a switch-on valve 74 of the control cooling branch 70, which switches on the refrigerant supply to the control cooling branch 70 for cooling the heat sink 62 ,
  • the on-off valve 74 is followed by a thermostatic expansion valve 76 of the control cooling branch 70, which is disposed between the input valve 74 and the input port 64 of the heat sink 62 and connected via a capillary tube 78 to a temperature sensor 82 at the output port 66 of the heat sink.
  • the expansion valve 76 in particular designed as a thermostatic expansion valve thus controls according to the measured by means of a temperature sensor 82 at the output terminal 66 of the heat sink 62
  • Temperature is the cooling capacity in the heat sink 62.
  • the output port 66 is connected via a connecting line 92, the control cooling branch 70 in which a evaporation pressure regulator 94 is disposed, with an intermediate pressure port AZ of the refrigerant compressor 32, so that already without control effect of
  • Evaporating pressure regulator 94 an evaporation pressure in the heat sink 62 is higher than a suction pressure of the refrigerant compressor 32 of the refrigerant circuit 10th
  • thermostatic expansion valve 76 Since the thermostatic expansion valve 76 is not externally controllable, the switch-on valve 74 is for switching off the control cooling branch 70
  • the evaporating pressure regulator 94 is connected in parallel to a throttle 98 which is arranged in a bypass line 96 of the control cooling branch 70 and which prevents undesired heating of the electronic power components 56 when the refrigerant compressor starts up, as also described in WO 2013/139909 A1.
  • all these components of the control cooling branch 70, together with the electronic power components 56, are arranged in a control housing mounted on the overall housing 36, for example on the motor housing 44 or possibly also on the compressor housing 42 and designated 100 as a whole, formed by on the one hand held on the overall housing 36 base unit 102, for example, carries the heat sink 62 on which the motor controller 52, the inverter 54 and in particular the electronic power components 56, in particular the inverter 54 are arranged cooled.
  • the base unit 102 in turn includes one closed around them
  • housing cover 10 is also provided with a circumferential flange portion 114 which is placed on the mounting flange 104 of the base unit and thus an interior 120, in which, for example, the control cooling branch 70 and the motor controller 52nd with the inverter 54 and the electronic power components 56
  • control housing 100 has the disadvantage that when using flammable refrigerant, such as the refrigerants that are low flammable or flammable or highly flammable, for example, according to IS0817 from 2014, a refrigerant leakage of all refrigerant-carrying components in the interior 120 of the control housing 100 in Connection with the interior 120
  • the control case 100 it is necessary to form the control case 100 so as to discharge refrigerant leaking from the inner space 120 upon refrigerant leakage.
  • the refrigerant has a specific weight which causes the refrigerant in the interior 120 to sink in the direction of gravity and forms a coolant accumulation 126 in the area of a deepest spatial area 122 in the direction of gravity, for example above a floor 124, then this room area 122 is a refrigerant outlet 130, which branches off from the lowest-lying spatial area 122
  • the base unit 102 passes through and also has a arranged in the discharge 132 filter element 134, which is constructed for example as a rigid sintered filter body and on the one hand, a reliable discharge of the gaseous refrigerant from the refrigerant accumulation 126 allows On the other hand, however, prevents penetration of dust and liquids, for example in the form of liquid droplets.
  • the filter element 134 filters out particles with a size of more than 100 ⁇ m, even better particles with a size of more than 50 ⁇ m.
  • a sleeve 136 which can be screwed into the discharge channel 132 is preferably provided, which forms a support 138 for the filter element 134 and can be screwed onto a cover 142, which applies the filter element 134 to the support 138 and which provides air exchange openings 144 is.
  • refrigerant discharge 130 it is possible to discharge refrigerant from the interior space 120 reliably from the refrigerant accumulation 126 so that it exits into the environment of the refrigerant compressor installation 30.
  • the removal of the refrigerant from the interior 120 is additionally supported by the fact that a refrigerant leakage in the region of the refrigerant-carrying elements in the interior 120 represents a, especially mostly permanent, gas supply to the interior, so that the need exists, especially if an overpressure in the interior 120th to avoid the supplied gas volume again, which takes place via the refrigerant outlet 130, which therefore also due to the gas supply to the interior 120 constantly gas from the interior 120 must derive, this gas in that in the lowest room area 122, the refrigerant accumulation 126th forms, is necessarily refrigerant.
  • a refrigerant accumulation 156 which comprises a plant controller 160 with a refrigerant leakage warning device 162, likewise forms in turn
  • Refrigerant sensor 164 can detect, wherein the refrigerant leakage warning device 162 measures the concentration of the refrigerant in the air in the installation space 150 and generates a warning signal when a defined threshold value is exceeded. Since the refrigerant cycle 10 is also arranged in the plant space 150 at the same time, the plant controller 160 is thus able to detect a refrigerant leakage in the refrigerant circuit 10 as well as a refrigerant leakage in the control housing 100 of the refrigerant compressor installation 30, thereby ensuring safe operation of both the refrigerant circuit as well as arranged in the control housing 100 refrigerant-carrying components is possible without a flammable or explosive gas mixture in the interior 120 of the control housing 100 or in the plant space 150 can form.
  • the overall housing 36 likewise comprises a compressor housing 42 and a motor housing 44, in which case a scroll compressor is arranged in the compressor housing 42, for example.
  • the arranged in the motor housing 44 electric drive motor 34 is flowed through by guided to the scroll compressor refrigerant, which preferably enters an inflow 172 of the motor housing 44, which is disposed on a side opposite the scroll compressor side of the electric drive motor 34 and an example frontal housing wall 174th adjacent, which simultaneously represents the base unit 102 for the control housing 100.
  • Control housing 100 the circumferential mounting flange 104, on which the housing cover 110 is seated with a flange 114 and sealed with this, so that the interior 120 of the control housing 100 in the same manner as in the first embodiment against the environment and, for example against mechanical shock, corrosion, corrosive Solutions, mold, insects, solar radiation, icing, dust and condensed liquids is protected.
  • the motor control 52 is seated in the control housing 100 with the converter 54 enclosed by it, with its electronic power components 56 sitting directly on the base unit 102, which simultaneously represents the housing wall 174 of the motor housing 44 and cooled by the refrigerant supplied to the inflow space 172 is.
  • a refrigerant outlet 130 is also provided in this embodiment in the deepest gravity in the spatial region 122 'of the interior 120, which is constructed and constructed in the same manner as in the first embodiment and causes that in the refrigerant accumulation 126' in Lowest space portion 122 'by the refrigerant leakage collecting refrigerant via the refrigerant outlet 130 from the interior 120' in the environment of the refrigerant compressor unit 30 'is discharged.
  • refrigerant entering the interior 120' of the control housing 110 'through refrigerant leakage can also be detected in the plant space 150 by the system controller 160 by means of the sensor 162 ,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Compressor (AREA)

Abstract

L'invention a trait à un système de compresseur frigorifique comprenant un compresseur frigorifique et un moteur électrique d'entraînement pour entraîner le compresseur frigorifique ainsi qu'une électronique de commande qui est logée de manière protégée dans l'espace intérieur d'un boîtier de commande, sert à commander le moteur électrique d'entraînement, et présente des composants électriques ou des composants électroniques de puissance. Afin d'améliorer la sécurité de ce système, lors du fonctionnement du système de compresseur frigorifique avec du réfrigérant combustible, le boîtier de commande, pour permettre l'évacuation de réfrigérant qui pénètre dans l'espace intérieur en raison d'une fuite de réfrigérant, est pourvu d'une conduite d'évacuation de réfrigérant n'ayant aucun effet au moins sur un critère de protection du boîtier de commande, laquelle conduite d'évacuation produit la sortie du réfrigérant qui pénètre dans l'espace intérieur en raison de la fuite de réfrigérant, vers l'environnement extérieur du système de compresseur frigorifique.
EP17780712.0A 2017-10-04 2017-10-04 Système de compresseur frigorifique Pending EP3692309A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2017/075229 WO2019068322A1 (fr) 2017-10-04 2017-10-04 Système de compresseur frigorifique

Publications (1)

Publication Number Publication Date
EP3692309A1 true EP3692309A1 (fr) 2020-08-12

Family

ID=60037593

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17780712.0A Pending EP3692309A1 (fr) 2017-10-04 2017-10-04 Système de compresseur frigorifique

Country Status (4)

Country Link
US (1) US11353247B2 (fr)
EP (1) EP3692309A1 (fr)
CN (1) CN111164352B (fr)
WO (1) WO2019068322A1 (fr)

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Also Published As

Publication number Publication date
US20200224940A1 (en) 2020-07-16
US11353247B2 (en) 2022-06-07
CN111164352B (zh) 2022-07-12
WO2019068322A1 (fr) 2019-04-11
CN111164352A (zh) 2020-05-15

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