EP3067645A1 - Circuit de réfrigération polyvalente optimisée - Google Patents

Circuit de réfrigération polyvalente optimisée Download PDF

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Publication number
EP3067645A1
EP3067645A1 EP16160032.5A EP16160032A EP3067645A1 EP 3067645 A1 EP3067645 A1 EP 3067645A1 EP 16160032 A EP16160032 A EP 16160032A EP 3067645 A1 EP3067645 A1 EP 3067645A1
Authority
EP
European Patent Office
Prior art keywords
solenoid valve
refrigeration circuit
valves
valve
compressor
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.)
Withdrawn
Application number
EP16160032.5A
Other languages
German (de)
English (en)
Inventor
Mauro Mantovan
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.)
Hiref SpA
Original Assignee
Hiref SpA
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 Hiref SpA filed Critical Hiref SpA
Publication of EP3067645A1 publication Critical patent/EP3067645A1/fr
Withdrawn legal-status Critical Current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
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/02—Compression machines, plants or systems, with several condenser circuits arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • 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
    • F25B2400/16—Receivers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/026—Compressor control by controlling unloaders
    • F25B2600/0261—Compressor control by controlling unloaders external to the compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2519—On-off valves

Definitions

  • the present patent application concerns a refrigeration circuit, in particular a refrigeration circuit for a multi-purpose machine.
  • a multi-purpose refrigeration machine comprises a refrigeration circuit in which the refrigerant fluid flows, a compressor for circulation of the refrigerant fluid, and a plurality of utilities which are adapted to request hot or cold independently from one other (for example one utility can request hot domestic water while another utility can request cold air).
  • the multi-purpose refrigeration circuit comprises, in turn, a plurality of valves, each of which is adapted to regulate forward movement of the exchanger fluid inside the refrigeration circuit so as to obtain temperature levels that can be distributed to the different utilities.
  • Piston servo-controlled solenoid valves are commonly used inside a refrigeration circuit of this type.
  • the operation of said valves does not depend solely on the magnetic field produced by passage of the current in a coil; a minimum inlet pressure is also necessary such as to move a piston and keep it raised from a main opening.
  • the opening/closing of the main valve seat is controlled by the piston, while opening/closing of the pilot hole is controlled by the mobile core of the coil.
  • the solenoid valves of known type have the drawback that the opening/closing command may not be definitive either because the design conditions of the solenoid valve do not fully occur or because downstream of the solenoid valve a higher pressure occurs than the pressure upstream (with flow direction opposite to the design direction). Therefore, the solenoid valve of known type may not remain perfectly sealed, due to fluttering of the shutter. In these operating conditions the solenoid valves can be subject to temperatures around 100°C and the fluttering of the shutter on the seal made of thermoplastic material results in the long term in a deterioration of the seal, with consequent leakage of refrigerant fluid. In the most extreme cases, the leakage of the refrigerant fluid can cause breakage of the compressor.
  • the object of the present invention is to provide a refrigeration circuit that overcomes the drawbacks described above.
  • the object of the present invention is to provide a refrigeration circuit as claimed in the attached claims.
  • the number 1 indicates as a whole a multi-purpose refrigeration circuit comprising, in turn, a compressor 2, a plurality of utilities U and a plurality of branches R.
  • the compressor 2 is adapted to ensure the flow of refrigerant fluid F inside the circuit 1, while the utilities U are adapted to work at temperatures differing from one another.
  • a utility R1 is adapted to request hot, while the other utility is adapted to request cold; for example, to obtain hot water and cold air.
  • the circuit 1 further comprises a plurality of solenoid valves S.
  • the circuit 1 comprises three solenoid valves S1, S2 and S3, each of which is installed along a respective branch R1, R2 and R3.
  • the branches R1, R2 and R3 are installed downstream, with respect to the direction of forward movement of the refrigerant fluid, of the compressor 2.
  • the branches R1, R2 and R3 are connected directly to the delivery of the compressor 2.
  • Each solenoid valve S1, S2 and S3 is connected directly to the delivery of the compressor; in other words, each solenoid valve S1, S2 and S3 is connected by means of a respective branch directly to the delivery of the compressor 2, without the interposition of other hydraulic elements.
  • the solenoid valves S1, S2, S3 directly downstream of the compressor 2 it is possible to regulate, in an extremely efficient and substantially instantaneous manner, the flow rate of the refrigerant fluid to be sent to the different utilities R1, R2 and R3, as required.
  • the solenoid valves S1, S2, S3 positioned directly downstream of the compressor 2 are subject to thermal and pressure stress resulting in fluttering which causes a high level of wear on the solenoid valves S1, S2, S3.
  • the circuit 1 further comprises a plurality of by-pass branches B each of which is connected in parallel to a respective branch R.
  • the circuit 1 comprises three by-pass branches B1, B2 and B3.
  • the by-pass branch B1 is in parallel to the branch R1
  • the by-pass branch B2 is in parallel to the branch R2
  • the by-pass branch B3 is in parallel to the branch R3.
  • the refrigeration circuit 1 further comprises a plurality of non-return valves V, each of which is associated with a respective solenoid valve S.
  • the circuit 1 comprises three non-return valves V1, V2, and V3.
  • the valve V1 is installed along the by-pass branch B1 in parallel to the solenoid valve S1 and can be flowed through by a flow in an opposite direction with respect to the direction in which the solenoid valve S1 is flowed through.
  • the valve V2 is installed along the by-pass branch B2 in parallel to the solenoid valve S2 and can be flowed through by a flow in an opposite direction with respect to the direction in which the solenoid valve S2 is flowed through.
  • the valve V3 is installed along the by-pass branch B3 in parallel to the solenoid valve S3 and can be flowed through by a flow in an opposite direction with respect to the direction in which the solenoid valve S3 is flowed through.
  • the circuit 1 further comprises, in a known way and illustrated schematically: a liquid receiver LR, an expansion valve VE and a liquid separator LS.
  • the multi-purpose refrigeration circuit comprises one or more non-return valves, each of which is installed in series downstream of a respective solenoid valve S; in which the flow-through direction of each non-return valve is equal to the flow-through direction of the respective solenoid valve.
  • the multipurpose refrigeration circuit comprises a plurality of solenoid valves and a plurality of non-return valves, in which one or more non-return valves are installed in series to the respective solenoid valves while the other non-return valves are installed in parallel to the respective solenoid valves.
  • the refrigeration circuit further comprises an electromechanical control system or a control system with microprocessor to regulate the opening of each solenoid valve S, according to the requirements of each utility U.
  • the respective non-return valve V prevents the refrigerant flow pushing against the shutter of the solenoid valve. If the non-return valve V is installed in series to the solenoid valve S, the refrigerant fluid is stopped directly by the non-return valve V. If there is a by-pass branch B, the flow is diverted into the by-pass branch B and substantially returned to the inlet of the solenoid valve S, thus avoiding undue use of said solenoid valve S.
  • the refrigeration circuit 1 of the type described above allows the flow of refrigerant fluid at different temperatures to be guided into different portions to meet the requirements of the different utilities U, significantly reducing wear on the components of the refrigeration circuit 1.
  • the refrigeration circuit 1 of the type described above can be used without distinction with all types of refrigerant fluids commonly used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Magnetically Actuated Valves (AREA)
EP16160032.5A 2015-03-12 2016-03-11 Circuit de réfrigération polyvalente optimisée Withdrawn EP3067645A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITBO20150120 2015-03-12

Publications (1)

Publication Number Publication Date
EP3067645A1 true EP3067645A1 (fr) 2016-09-14

Family

ID=53284320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16160032.5A Withdrawn EP3067645A1 (fr) 2015-03-12 2016-03-11 Circuit de réfrigération polyvalente optimisée

Country Status (1)

Country Link
EP (1) EP3067645A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800007108A1 (it) * 2018-07-11 2020-01-11 Dispositivo di refrigerazione e relativo metodo di funzionamento

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196595A (en) * 1976-01-29 1980-04-08 Dunham-Bush, Inc. Integrated thermal solar heat pump system
US5040376A (en) * 1990-02-23 1991-08-20 Kabushiki Kaisha Toshiba Air-conditioning apparatus having indoor units connected to one outdoor unit via one branch unit
EP1337793A1 (fr) * 2000-11-10 2003-08-27 Patrick Colin Systeme reversible de recuperation d'energie calorifique
US20140260358A1 (en) * 2013-03-13 2014-09-18 Rheem Manufacturing Company Apparatus and methods for pre-heating water with air conditioning unit or heat pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196595A (en) * 1976-01-29 1980-04-08 Dunham-Bush, Inc. Integrated thermal solar heat pump system
US5040376A (en) * 1990-02-23 1991-08-20 Kabushiki Kaisha Toshiba Air-conditioning apparatus having indoor units connected to one outdoor unit via one branch unit
EP1337793A1 (fr) * 2000-11-10 2003-08-27 Patrick Colin Systeme reversible de recuperation d'energie calorifique
US20140260358A1 (en) * 2013-03-13 2014-09-18 Rheem Manufacturing Company Apparatus and methods for pre-heating water with air conditioning unit or heat pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800007108A1 (it) * 2018-07-11 2020-01-11 Dispositivo di refrigerazione e relativo metodo di funzionamento
WO2020012348A1 (fr) * 2018-07-11 2020-01-16 Angelantoni Test Technologies S.R.L. - In Breve Att S.R.L. Dispositif de réfrigération et procédé de réfrigération associé
CN112400088A (zh) * 2018-07-11 2021-02-23 安吉拉通力测试技术有限公司简称Att有限公司 制冷装置和相关的操作方法
US11624538B2 (en) 2018-07-11 2023-04-11 Angelantoni Test Technologies Srl-In Breve Att Srl Refrigeration device provided with a secondary by-pass branch and method of use thereof

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