EP3848651A1 - Appareil thermotechnique - Google Patents

Appareil thermotechnique Download PDF

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Publication number
EP3848651A1
EP3848651A1 EP21150723.1A EP21150723A EP3848651A1 EP 3848651 A1 EP3848651 A1 EP 3848651A1 EP 21150723 A EP21150723 A EP 21150723A EP 3848651 A1 EP3848651 A1 EP 3848651A1
Authority
EP
European Patent Office
Prior art keywords
refrigerant circuit
pipe
compressor
thermal device
longer
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
EP21150723.1A
Other languages
German (de)
English (en)
Inventor
Thorsten Schmidt
Alexander Filand
Julian Thiele
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.)
Viessmann Climate Solutions SE
Original Assignee
Viessmann Werke 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 Viessmann Werke GmbH and Co KG filed Critical Viessmann Werke GmbH and Co KG
Publication of EP3848651A1 publication Critical patent/EP3848651A1/fr
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/06—Silencing apparatus characterised by method of silencing by using interference effect
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • 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
    • F25B2500/12—Sound

Definitions

  • the invention relates to a thermal device according to the preamble of claim 1.
  • thermotechnical device described there consists of a refrigerant circuit through which a refrigerant flows and is provided with a compressor for compressing the refrigerant, with an interference silencer (more precisely: a lambda / 4 resonator, see for example also the document WO 1998/037541 A1 ) is provided.
  • an interference silencer more precisely: a lambda / 4 resonator, see for example also the document WO 1998/037541 A1 .
  • the aforementioned interference silencer is used to reduce airborne noise in the air shafts of the heat pump.
  • the invention is based on the object of improving a thermal device of the type mentioned at the beginning.
  • a thermal device should be dampened even better.
  • the device should be designed as compact as possible.
  • the interference silencer is designed to reduce a low-frequency pulsation caused by the compressor as a pipeline that branches off from the refrigerant circuit and is flooded by the refrigerant.
  • the solution according to the invention is characterized in that the interference silencer, preferably a lambda / 4 resonator, is fluidically connected directly to the compressor via the refrigerant circuit or via the refrigerant and in this way particularly effectively reduces the noise generated.
  • the interference silencer preferably a lambda / 4 resonator
  • the pipeline has at least one bend.
  • thermotechnical device According to the invention,
  • Helmholtz resonators for damping the pressure pulsations of screw compressors are known from a project by ISMB Dautermann GmbH. There is a corresponding one for this Report attached to the registration documents. This is also available at https://www.ismb.de/index.php?Helmholtz_Resonator.
  • chamber silencers are also known (see, for example, https://ww-w.skh-kaeltetechnik.de/Geraeuschdaempfer-Frigo-Mec-22-mm), but these are generally designed and not specifically designed for the operating frequency of the compressor .
  • thermal engineering device including its advantageous developments according to the dependent claims, is explained in more detail below with reference to the drawing of a preferred exemplary embodiment.
  • thermotechnical device shown consists in a known manner of a refrigerant circuit 2 through which a refrigerant flows and is provided with a compressor 1 for compressing the refrigerant, an interference silencer 3 being provided for noise reduction of the thermotechnical device.
  • the interference silencer 3 for reducing a low-frequency pulsation caused by the compressor 1 is designed as a pipeline 4 leaving the refrigerant circuit 2 and flooded by the refrigerant.
  • the refrigerant circuit 2 in addition to the compressor 1 also has a condenser 5, a throttle 6 and an evaporator 7.
  • a condenser 5 is assigned downstream of the compressor 1, viewed in the direction of flow of the refrigerant.
  • the interference silencer 3 is arranged behind the compressor 1 on the refrigerant circuit 2, as seen in the flow direction of the refrigerant (see FIG Figure 1 ). Considered even more precisely, it is particularly preferably provided that the interference silencer 3 is arranged between the compressor 1 and the condenser 5 on the refrigerant circuit 2.
  • a pipe section of the refrigerant circuit 2 provided between the compressor 1 and a connection point to the pipe 4 of the interference silencer 3 is no longer than 100 cm, preferably no longer than 75 cm, particularly preferably no longer than 50 cm, very particularly preferably no longer than 35 cm.
  • a pipe section of the refrigerant circuit provided between the condenser 5 and a connection point to the pipe 4 of the interference silencer 3 2 is not longer than 100 cm, preferably not longer than 75 cm, particularly preferably not longer than 50 cm, very particularly preferably not longer than 35 cm.
  • the pipeline 4 has a cross-sectional area which corresponds to a cross-sectional area of the refrigerant circuit 2.
  • the pipeline 4 preferably also has a length corresponding to a multiple of its diameter.
  • the pipeline 4 is designed to be closed at its end facing away from the refrigerant circuit 2.
  • the pipeline 4 preferably has at least one curve 4.1.
  • the curvature 4.1 is optionally designed as a 90 ° or 180 ° pipe bend (see FIG Figures 2 and 3 ). It is also preferred that the pipeline 4, after branching off from the refrigerant circuit 2, initially has a 90 ° pipe bend and then has at least one 180 ° pipe bend.
  • the pipeline 4 is designed to extend vertically upwards from the refrigerant circuit 2. It is also preferred that the pipeline 4 is formed at right angles upwards from the refrigerant circuit 2. In addition, it is preferred that the pipeline 4, in order to avoid oil accumulation in the pipeline 4, is completely above it Junction 4.2 is arranged on the refrigerant circuit 2. It is also preferred that the pipeline 4 is designed to be hydraulically connected to a horizontally extending pipe section of the refrigerant circuit 2.
  • the interference silencer 3 is preferably formed from several pipes 4 of different lengths. It is preferred that at least some, preferably all, longer sections of the pipelines 4 are arranged to run parallel to one another.
  • the interference silencer 3 is preferably designed as a lambda / 4 resonator.
  • the interference silencer 3 is designed to reduce frequencies in the range from 20 to 200 Hertz, preferably from 30 to 120 Hertz.
  • thermotechnical device works as follows: If the thermal device is put into operation, the compressor 1 is started.
  • the compressor 1 generates sound vibrations during operation, in particular low-frequency pulsations, which propagate through the refrigerant circuit 2 and can thus be transferred to other components of the thermal device or even to external components or rooms, which is an undesirable side effect of the operation of the device.
  • the low-frequency pulsations of the compressor 1 propagate via the refrigerant circuit 2 into the interference silencer 3 connected to it (directly behind the compressor 1).
  • the interference silencer 3 here consists of several winding pipes 4, each with a closed end. These pipes 4 each act like a lambda / 4 resonator, ie the sound waves / pulsations of the compressor 1 are reflected at the closed end of the pipes 4 in such a way that the reflected destructively interfere with the incoming sound waves and thus cancel each other out.
  • the length of the pipelines 4 is dimensioned in a manner known per se so that the destructive interference occurs in the area of the compressor pulsations, i.e., depending on the type of compressor 1, in the range from 20 to 200 Hertz, preferably in the range from 30 to 120 Hertz.
  • a thermal device of the type described above in which the compressor 1 is preferably arranged in a first housing intended for installation outdoors and the condenser 5 is arranged in a second housing intended for installation in a building (i.e. a so-called split device), has the advantage that the pulsations generated by the compressor 1 are dampened near their source and thus cannot spread far over the refrigerant circuit 2.
  • the preferably provided winding shape of the pipelines 4 also makes the interference silencer 3 comparatively space-saving.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Compressor (AREA)
EP21150723.1A 2020-01-10 2021-01-08 Appareil thermotechnique Pending EP3848651A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020100445.1A DE102020100445A1 (de) 2020-01-10 2020-01-10 Wärmetechnisches Gerät

Publications (1)

Publication Number Publication Date
EP3848651A1 true EP3848651A1 (fr) 2021-07-14

Family

ID=74125095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21150723.1A Pending EP3848651A1 (fr) 2020-01-10 2021-01-08 Appareil thermotechnique

Country Status (2)

Country Link
EP (1) EP3848651A1 (fr)
DE (1) DE102020100445A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998037541A1 (fr) 1997-02-19 1998-08-27 Rieter Automotive (International) Ag Absorbeur quart d'onde a largeur de bande ajustable
US20090090579A1 (en) * 2007-10-03 2009-04-09 Denso Corporation Silencer for refrigeration cycle system
EP2048457A1 (fr) * 2006-08-01 2009-04-15 Daikin Industries, Ltd. Dispositif de réfrigération
EP2058609A1 (fr) * 2006-08-11 2009-05-13 Daikin Industries, Ltd. Climatiseur
DE102006053277B4 (de) 2006-11-03 2010-02-18 Deutsches Zentrum für Luft- und Raumfahrt e.V. Resonatorvorrichtung und Brennkammervorrichtung
US20160312773A1 (en) * 2015-04-22 2016-10-27 Trane International Inc. Refrigerant Line Muffler
US20190234390A1 (en) * 2018-01-31 2019-08-01 Trane International Inc. Pressure Pulsation Traps

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998037541A1 (fr) 1997-02-19 1998-08-27 Rieter Automotive (International) Ag Absorbeur quart d'onde a largeur de bande ajustable
EP2048457A1 (fr) * 2006-08-01 2009-04-15 Daikin Industries, Ltd. Dispositif de réfrigération
EP2058609A1 (fr) * 2006-08-11 2009-05-13 Daikin Industries, Ltd. Climatiseur
DE102006053277B4 (de) 2006-11-03 2010-02-18 Deutsches Zentrum für Luft- und Raumfahrt e.V. Resonatorvorrichtung und Brennkammervorrichtung
US20090090579A1 (en) * 2007-10-03 2009-04-09 Denso Corporation Silencer for refrigeration cycle system
US20160312773A1 (en) * 2015-04-22 2016-10-27 Trane International Inc. Refrigerant Line Muffler
US20190234390A1 (en) * 2018-01-31 2019-08-01 Trane International Inc. Pressure Pulsation Traps

Also Published As

Publication number Publication date
DE102020100445A1 (de) 2021-07-15

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