EP4063759A1 - System zur wassererhitzung - Google Patents

System zur wassererhitzung Download PDF

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Publication number
EP4063759A1
EP4063759A1 EP22163141.9A EP22163141A EP4063759A1 EP 4063759 A1 EP4063759 A1 EP 4063759A1 EP 22163141 A EP22163141 A EP 22163141A EP 4063759 A1 EP4063759 A1 EP 4063759A1
Authority
EP
European Patent Office
Prior art keywords
refrigerant
compartment
wall
heat pump
box
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.)
Granted
Application number
EP22163141.9A
Other languages
English (en)
French (fr)
Other versions
EP4063759B1 (de
Inventor
Cédric Geoffroy
Yvan Bourdin
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.)
Compagnie Industrielle des Chauffe Eau SA CICE
Original Assignee
Compagnie Industrielle des Chauffe Eau SA CICE
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 Compagnie Industrielle des Chauffe Eau SA CICE filed Critical Compagnie Industrielle des Chauffe Eau SA CICE
Publication of EP4063759A1 publication Critical patent/EP4063759A1/de
Application granted granted Critical
Publication of EP4063759B1 publication Critical patent/EP4063759B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • F24H4/04—Storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • F24H9/148—Arrangements of boiler components on a frame or within a casing to build the fluid heater, e.g. boiler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/16—Arrangements for water drainage 
    • F24H9/17—Means for retaining water leaked from heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • F24H9/2021—Storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F24D19/1054—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F24D2200/123—Compression type heat pumps

Definitions

  • the present invention relates to a water heating system, in particular sanitary water, comprising a water heater and a heat pump device.
  • the system comprises a water heater positioned inside the dwelling, equipped with a water tank, as well as a heat pump device, comprising in particular a compressor, a condenser, an expansion valve and a evaporator, forming part of a thermodynamic loop.
  • a heat pump device comprising in particular a compressor, a condenser, an expansion valve and a evaporator, forming part of a thermodynamic loop.
  • thermodynamic loop a refrigerant circulates which is set in motion and compressed in the compressor, then undergoes condensation in the condenser before being expanded in the expansion valve and finally undergoes evaporation in the evaporator.
  • the evaporator and the condenser are heat exchangers, in each of which the refrigerant partially exchanges its thermal energy with another fluid.
  • the water tank of the water heater is then heated by the condenser, for example by means of an element wound around the tank.
  • the refrigerant was chosen in flammability class A1, ie non-flammable. This is particularly the case for R134a and R513a fluids. Nevertheless, these gases have a non-negligible, even high, effect on global warming. As a result, the regulations have evolved to encourage the use of fluids with less impact on global warming, in particular less polluting in the sense of global warming. However, these fluids turn out to be flammable, and it is then absolutely necessary to protect the water heating systems against any leakage of this type of refrigerant from the thermodynamic loop to avoid any risk of fire or explosion of the system which could endanger the occupants of the dwelling as well as material goods.
  • the present disclosure incorporates the new environmental constraints to limit and/or control, through the design of a heating system, the risks in the event of a leak of the flammable refrigerant.
  • a water heating system in particular sanitary water, comprising a water heater provided with a water tank, as well as a heat pump device provided with a condenser, an evaporator, a compressor fluidly connected to each other so as to circulate a refrigerant, the heating system comprising a compartment housing the water tank, called the water heater compartment, and a compartment housing at least the evaporator and of the compressor, called the heat pump compartment, the system comprising at least one ignition source, and a casing housing said at least one ignition source, said casing preferably being arranged under a point located at the highest point of the heat pump compartment when the system is installed in a service position, characterized in that an internal volume of the box is dimensioned to collect a predetermined quantity of refrigerant in the event of a leak from the latter and in that the cai sson includes outlet vents for the refrigerant out of the box.
  • the box ensures the safety of the ignition sources which are placed out of reach of the refrigerant in the event of a leak thereof.
  • the casing comprises a wall, called the rear wall, arranged facing the water heater compartment, the said wall being provided with an opening for passage of the refrigerant in the event of a leak thereof, in particular in the compartment. water heater.
  • the casing comprises means for bypassing the casing by the refrigerant in the event of a leak thereof, in particular in the heat pump compartment.
  • the casing is delimited by a so-called upper wall, a so-called lower wall, opposite the upper wall, the upper wall being arranged above the lower wall in the service position, the casing also being delimited by a so-called front wall, arranged between the upper wall and the lower wall, at least one of said walls, called curved wall, having a curvature to deflect the refrigerant away from the box, said bypass means comprising said at least one curved wall.
  • the heat pump compartment comprises a wall for discharging the refrigerant provided with orifices for discharging the refrigerant.
  • the system comprises an electrical connection conduit from the heat pump compartment to the casing, one end of the conduit being placed in the heat pump compartment above a lowest height of the fluid evacuation orifices refrigerant and/or one end of the conduit on the box side being arranged below a lowest height of said at least one source of ignition of the box.
  • said at least one ignition source is at least one of an electric heating element and an electronic control means of the heat pump compartment.
  • the casing is arranged opposite the water heater compartment and/or under the heat pump compartment.
  • the subject of the invention is a system for heating water, in particular sanitary water, referenced 1.
  • the heated water is intended to supply a network of ducts in a dwelling.
  • system 1 is illustrated in a service position, which corresponds to a position in which the system 1 is arranged in or around the dwelling, preferably in a sheltered room, ready to operate. .
  • the system 1 notably comprises a heat pump device 2 as well as a water heater 3.
  • the water heater 3 is provided with a water tank 4, the water of which is heated by the heat pump device 2, as will be detailed later.
  • the heat pump device 2 is provided with a condenser 5, an evaporator 6, a compressor 7, and an expansion valve (not shown) forming a thermodynamic loop.
  • the heat pump device 2 advantageously comprises a fan 8 to force a flow of air into the evaporator 6.
  • a refrigerant circulates in the thermodynamic loop, in a set of ducts 9 of the device 2.
  • the flow of air discharges its calories into the evaporator 6, where the refrigerant circulates, while the refrigerant exchanges all or part of the calories it contains in the condenser, which heats water stored in tank 4.
  • a refrigerant is chosen whose global warming power (GWP, or "Global Warming Potential") is moderate or even low, advantageously less than or equal to 750, preferably less than or equal to 150.
  • GWP global warming power
  • This type of refrigerant has a gas phase density greater than 1. In other words, when the fluid leaks out of the loop, it tends to descend by gravity.
  • the system 1 comprises a first compartment 10, hereinafter called the heat pump compartment, and a second compartment 11, hereinafter called the water heater compartment.
  • the heat pump compartment 10 is arranged on the water heater compartment 11 in the service position. In other words, the compartment 10 forms the upper part of the system 1.
  • the heat pump compartment 10 comprises an envelope 12, a base 13, as well as at least the evaporator 6, the compressor 7, the fan 8, the ducts 9 mounted on the base 13.
  • the envelope 12 and the base 13 form a housing for the elements 6 to 9, preferably of cylindrical shape.
  • the water heater compartment 11 comprises the water tank 4, the condenser 5, in the form of a coil arranged around the water tank 4, to heat the water contained in the tank 4, as well as an immersed electric heating resistance in the water tank 4 (not shown), also allowing the heating of the water in the tank 4.
  • the compartment 11 comprises a covering, provided with a cylindrical longitudinal wall 15, elements 4 and 5.
  • the box 20 is separate from each of the compartments 10 and 11.
  • the casing 20 is arranged under the highest point of the heat pump device 2 in the service position of the system 1. In the illustrated embodiment, the casing 20 is arranged against the trim 15 of the water heater compartment 11.
  • the box 20 houses an ignition source 21 which is a means for electrically controlling the heating resistor and/or the heat pump device 2.
  • the means 21 is in the form of a a printed circuit board provided with electronic power components.
  • control means 21 constitutes what is called a source of ignition or ignition, that is to say that, due to the local heating of the air generated by the operation of the electronic components of the control means 21 or of a spark linked to an unsealed electrical contact, there is a risk of ignition of the refrigerant in the event of a leak thereof.
  • hot spots of the non-immersed heating element type also constitute a source of ignition. Once the auto-ignition temperature is reached, the fluid ignites, even in the absence of an electrical contact type.
  • the box 20 is shaped so that its internal volume is sized to collect a predetermined quantity of refrigerant in the event of a leak.
  • the box 20 distinct from the compartments 10 and 11, and its adapted volume, provide protection for the ignition source 21 by creating a buffer zone in the event of a refrigerant leak.
  • the box 20 is delimited by two opposite walls, front and rear, 22, 23, two opposite walls, upper and lower, 24, 25 and two opposite side walls, 26, 27.
  • the rear wall 23 is arranged against the wall longitudinal length of the casing 15 of the water heater compartment 11.
  • the front and rear walls, 22, 23, extend substantially in a vertical plane ( ⁇ , z).
  • the rear wall 23 is provided with an opening 28 for fluid communication between the interior of the compartment 11 and the box 20.
  • the opening 28 is circular. Nevertheless, other forms are possible.
  • the longitudinal wall of the casing 15 is provided with a similar opening, which ensures that a refrigerant leak can be evacuated from the water heater compartment 11 into the box 20.
  • the printed circuit board 27 is arranged in the upper part of the rear wall 23 while the opening 28 is arranged in the lower part of the rear wall 23.
  • the internal volume of the box 20 is divided into a volume of the part top, including the map 27 and a volume of the lower part, including the opening 28.
  • the volume of the upper part is referenced V1 and the volume of the lower part V2.
  • An interface I delimits the volume V1 on the one hand and the volume V2 on the other hand. The interface is not perfectly sealed because junctions are available between the two volumes (notably cable passage).
  • the box 20 also includes vents 29 for evacuating refrigerant from the box 20.
  • the size of the vents, their shape, their spacing, their positions in the walls of the box 20 are chosen so as to allow the flow of the entire charge of refrigerant in a given time, preferably less than 5 min.
  • vents 29 are holes drilled in the bottom wall 25, rectangular in shape and parallel to each other. Nevertheless, it is also possible to envisage positioning the vents in the front wall and/or the side walls.
  • vents are dimensioned so as to prevent access to the control means 21 by a user (test finger).
  • Curved parts 30, 31 provide a junction between the upper wall 24 and each of the side walls 26, 27.
  • curved walls 32, 33 provide a junction between the lower wall 25 and each of the side walls 26, 27.
  • the front and rear walls, 22, 23 have a generally rectangular shape, the corners of which are curved according to the curvature of the curved parts 30, 31, 32, 33.
  • the casing 20 comprises means 34 for bypassing the casing 20 by the refrigerant in the event of a leak thereof.
  • the bypass means 34 comprise the junction parts 30, 31 between the top wall 24 and the side walls 26, 27.
  • the fluid If refrigerant escapes from the heat pump device 2, for example through the interior of the heat pump compartment 10 into the interior of the water heater compartment 11, or directly from the condenser 5 of the water heater compartment 11 (arrows F2 on the figure 6 ), the fluid accumulates by gravity in the lower part of the water heater compartment 11 until it reaches the height of the opening 28, through which the fluid leaves the compartment 11 and enters the box 20. Again by gravity, the fluid descends into the box 20 until it evacuates the box 20 through the vents 29.
  • bypass means 34 prevents the fluid from entering the box 20.
  • the system 1 also comprises a profile 35 inside which at least one electric cable ensures the connection between the control means 21 of the heat pump device 2 and the heat pump compartment 11.
  • a lower end 35-1 of the profile 35 is arranged in the water heater compartment 11 and one end 35-2 of section 35 is placed in the heat pump compartment 10.
  • Compartment 10 can also be provided with ignition sources 40. These are for example capacitors, wiring, electronic elements.
  • the heat pump compartment 10 comprises a wall 36 for evacuating the refrigerant provided with orifices 37 for evacuating the refrigerant, also called huis.
  • the wall 36 extends vertically around certain elements of the compartment 10, the evaporator 6 and the fan 8 in particular.
  • the wall 34 has a section curved along an arc of a circle, for example a semicircle.
  • the wall 34 is advantageously placed on the base 13 and has a height slightly less than a height of the envelope 12.
  • the orifices 37 are identical and uniformly distributed in the wall 36.
  • the invention is not limited to this arrangement and it is possible to envisage orifices of dimensions and/or shapes different from each other. others, and/or distributed unevenly in the wall 36.
  • the orifices 37 are arranged at the interface between the heat pump compartment 10 and the exterior of the system 1.
  • a set of pipes lead the fluid to the orifices arranged at a lower point. of compartment 10 with no sources of ignition.
  • the heat pump compartment 10 also comprises at least one wall for protecting the ignition sources present in the compartment 10.
  • the protective wall(s) have a higher height than the height of the lowest orifices.
  • the compartment 10 comprises a set 38 of protective walls, including a flat wall 39 flat.
  • the fluid cannot reach the sources of ignition because it will be evacuated beforehand through the orifices 37, thus preventing any risk of ignition between the ignition sources and the fluid.
  • the upper end 35-2 of the profile 35 is arranged in the heat pump compartment 10 above the lowest height of the orifices 37. This arrangement makes it possible to prevent the refrigerant from escaping from the compartment 10 in profile 29.
  • the lower end 35-1 of the conduit 35 on the box side is arranged below a lowest height of the ignition source 21 of the box 20.
  • the rear, side and top faces being designed in such a way as to guide the fluid around the box 20, there is a very strong limitation of the penetration of fluid into the box 20, which ensures that the concentration of refrigerant fluid remains lower. at a threshold value that would trigger an ignition under the operating conditions of system 1.
  • the opening between the casing 15 and the casing 20 makes it possible to avoid trapping fluid under the casing and to evacuate the fluid through the opening, then the vents of the casing 20.
  • the refrigerant is R290 (generic name propane).
  • the total amount of fluid in system 1 is 150g maximum, preferably 130g.
  • the box 20 has dimensions of 460 mm ⁇ 235 mm ⁇ 55 mm.
  • the lower zone of the box 20 can contain 5g out of the 130g of the product, ie 4%.
  • the invention resides in the creation of a zone positioned under the highest point of the heat pump circuit in such a way that the ignition sources can be installed there without possible contact with refrigerant from any leak.
  • protective walls can take various forms and in particular: sealed compartment on the side faces with or without cowling, the upper part, tube, profile, guide etc...

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
EP22163141.9A 2021-03-22 2022-03-21 System zur wassererhitzung Active EP4063759B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2102847A FR3120932B1 (fr) 2021-03-22 2021-03-22 Systeme de chauffage d’eau

Publications (2)

Publication Number Publication Date
EP4063759A1 true EP4063759A1 (de) 2022-09-28
EP4063759B1 EP4063759B1 (de) 2023-12-27

Family

ID=75539642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22163141.9A Active EP4063759B1 (de) 2021-03-22 2022-03-21 System zur wassererhitzung

Country Status (4)

Country Link
EP (1) EP4063759B1 (de)
ES (1) ES2970140T3 (de)
FR (1) FR3120932B1 (de)
PL (1) PL4063759T3 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3118537A1 (de) * 2015-07-14 2017-01-18 Vaillant GmbH Luftkanal gerät mit ventilations-verschluss
EP3128252A1 (de) * 2015-08-07 2017-02-08 Vaillant GmbH Wärmepumpensystem
US20190128565A1 (en) * 2017-10-30 2019-05-02 Rheem Manufacturing Company Hybrid water heater
WO2019175646A1 (en) * 2018-03-13 2019-09-19 Diederiks Franco Electric water heating apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3118537A1 (de) * 2015-07-14 2017-01-18 Vaillant GmbH Luftkanal gerät mit ventilations-verschluss
EP3128252A1 (de) * 2015-08-07 2017-02-08 Vaillant GmbH Wärmepumpensystem
US20190128565A1 (en) * 2017-10-30 2019-05-02 Rheem Manufacturing Company Hybrid water heater
WO2019175646A1 (en) * 2018-03-13 2019-09-19 Diederiks Franco Electric water heating apparatus

Also Published As

Publication number Publication date
FR3120932A1 (fr) 2022-09-23
ES2970140T3 (es) 2024-05-27
PL4063759T3 (pl) 2024-04-15
EP4063759B1 (de) 2023-12-27
FR3120932B1 (fr) 2023-02-10

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