EP3896213A1 - A laundry treating appliance having a heat pump system - Google Patents
A laundry treating appliance having a heat pump system Download PDFInfo
- Publication number
- EP3896213A1 EP3896213A1 EP20169725.7A EP20169725A EP3896213A1 EP 3896213 A1 EP3896213 A1 EP 3896213A1 EP 20169725 A EP20169725 A EP 20169725A EP 3896213 A1 EP3896213 A1 EP 3896213A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- holes
- laundry treating
- treating appliance
- fins
- metallic pipes
- 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
Links
- 239000003507 refrigerant Substances 0.000 claims abstract description 53
- 239000012530 fluid Substances 0.000 claims abstract description 28
- 238000005406 washing Methods 0.000 claims description 13
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 239000001294 propane Substances 0.000 claims description 6
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 6
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 4
- 229930195733 hydrocarbon Natural products 0.000 claims description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims description 4
- 239000004215 Carbon black (E152) Substances 0.000 claims description 3
- 238000010412 laundry washing Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010792 warming Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/20—General details of domestic laundry dryers
- D06F58/206—Heat pump arrangements
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/04—Heating arrangements
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/20—General details of domestic laundry dryers
- D06F58/24—Condensing arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
- F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
Definitions
- the present invention refers to a laundry treating appliance, for example a laundry washing machine (called also washing machine), a laundry washer-drier (called also washer-drier), a tumble drier, having a heat pump system.
- a laundry washing machine for example a laundry washing machine (called also washing machine), a laundry washer-drier (called also washer-drier), a tumble drier, having a heat pump system.
- Traditional laundry treating appliances typically comprise a cabinet containing a rotatable drum wherein the laundry to be treated (i.e. washed and/or dried) can be loaded.
- An operating fluid e.g., depending on the kind of laundry treating appliance and on the treating process to be applied, water, water mixed with a washing/rinsing additive, air
- a circulating system comprising, for example pumps, valves, fans, etc., depending on the kind of fluid to be circulated.
- the operating fluid is heated and/or cooled/dehumidified by a heat pump system, typically comprising a compressor, an expansion valve, two heat exchangers (one operating as a condenser, and the other as an evaporator), and conduits fluidly connecting such elements in a closed circuit.
- a heat pump system typically comprising a compressor, an expansion valve, two heat exchangers (one operating as a condenser, and the other as an evaporator), and conduits fluidly connecting such elements in a closed circuit.
- a heat pump system has an improved energy efficiency with respect to traditional heating systems using an electrical heater as heat source.
- Some refrigerant flows through the compressor, the condenser, the expansion valve and the evaporator, and through the conduits connecting these to one another.
- the refrigerant releases heat to the operating fluid by means of the condenser, and extracts heat and humidity from the operating fluid by means of the evaporator.
- the compressor converts electromechanical power to thermal power by compressing the refrigerant in the refrigerant circuit
- HFC hydrofluorocarbon
- R134a and R407C the refrigerants mainly used in heat pump systems of known laundry treating appliances
- these refrigerants have a high Global Warming Potential (GWP), so alternative refrigerants start to be more and more used in different industries.
- GWP Global Warming Potential
- hydrocarbons refrigerants such as propane (R290) and propylene (R1270).
- the evaporator works at low pressure, and the refrigerant contained therein is mainly a liquid-vapour mixture and a superheated vapour, so its density is quite low. It has been observed that limiting to 150 g the refrigerant charge could negatively affect the performances of the heat pump system, in particular its energy efficiency.
- a known kind of heat exchanger widely used in heat pump systems of laundry treating appliances, comprises a plurality of fins, typically made of aluminum and having a rectangular plane, stacked in spaced and parallel planes; the fins comprise a plurality of through-holes wherein a plurality straight pipes, made of copper or aluminum, parallel one another and perpendicular to the fins, are fitted, with their lateral surface into close contact with the border of the through-holes, so as to obtain an effective heat-exchange.
- the straight pipes are connected in twos, at one end, by a curved pipe, to define as a whole a single duct wherein the refrigerant flows; this single duct has an inlet portion and an outlet portion protruding from the stack of fins, and connectable to the rest of the heat pump system circuit.
- the operating fluid flows through the gaps between the fins, exchanging heat with the latter, and therefore with the refrigerant flowing in the pipes, which are thermally connected to the fins.
- the fins used for producing such heat exchangers are typically produced and sold with standardized dimensions, and with a fixed number of through-holes; the producers of laundry treating appliances using such a kind of heat exchangers, in order to keep reduced the production costs, typically purchase the available fins having external dimensions (i.e. length and width) suitable for their appliances, stack them in spaced and parallel planes, and insert in all the through-holes the same number of straight pipes; typically the pipes are fastened to the through-holes by radially expanding such pipes by suitable tools. Then, the straight pipes are connected in twos, at one end, by a curved pipe, to define as a whole the single duct wherein the refrigerant flows.
- the aim of the present invention is therefore obtaining a laundry treating appliance using a heat pump system, having a reduced Global Warming Potential (GWP) and an improved efficiency, and at the same time keeping reduced the production costs.
- GWP Global Warming Potential
- a further object of the invention is obtaining a laundry treating appliance fulfilling the safety regulations related to the refrigerant of the heat pump system, without reducing the overall energy efficiency, and and at the same time keeping reduced the production costs.
- Applicant has found that, by leaving empty (i.e. not inserting pipes therein) two or more through-holes of the fins of a heat exchanger of the heat pump system, it is possible reducing the overall internal volume of the single duct of the heat exchanger wherein the refrigerant flows without reducing the length of the single pipes composing such a single duct nor the number of fins, and therefore without reducing the overall thermal exchange surface, also using standard fins available in the market having a prefixed number of through-holes, and so without using customized fins which could increase the production costs.
- This inventive solution allows using in the heat pump system a flammable refrigerant, like for example propane (R290) or propylene (R1270), which have a very low Global Warming Potential (GWP), but that needs to be used in small quantities, and therefore requires a reduced volume of the single duct of the heat exchanger wherein the refrigerant flows.
- a flammable refrigerant like for example propane (R290) or propylene (R1270)
- GWP Global Warming Potential
- a laundry treating appliance comprising:
- the four or more through-holes of any fin of the plurality of fins are respectively aligned with the four or more through-holes of the rest of the plurality of fins.
- the perimeter edges of the stacked fins define as a whole an envelope surface (i.e. a surface that is tangent to the perimeter edges of all the stacked fins) comprising at least a plane portion, and wherein the four or more through-holes of each of the fins are positioned on the respective fin to define at least one first row perpendicular to the plane portion and/or at least one second row perpendicular to the first rows.
- the at least two through-holes of the four or more through-holes not housing any of the metallic pipes belong to a same second row.
- At least two through-holes of the four or more through-holes not housing any of the metallic pipes belong to a same first row.
- the fins comprise at least two second rows, and at least two through-holes of the four or more through-holes not housing any of the metallic pipes belong to two contiguous second rows.
- the fins comprise at least two perpendicular rows, and at least two through-holes of the four or more through-holes not housing any of the metallic pipes belong to two contiguous perpendicular rows.
- all the through-holes of the at least one first row and/or of the at least one second row do not house any of the metallic pipes.
- the metallic pipes comprise two or more straight pipes, parallel one another and perpendicular to the fins, each one of the two or more straight pipes being housed in one of the four or more through-holes of the fins, the two or more straight pipes being connected in twos, at one end, by a curved pipe, to define as a whole a single duct wherein the flammable refrigerant flows.
- the single duct comprises an inlet portion and an outlet portion configured for allowing said flammable refrigerant respectively to enter/exit said single duct.
- the inlet portion and the outlet portion protrude both from a same terminal fin of the plurality of fins.
- the flammable refrigerant is or comprises a hydrocarbon.
- the flammable refrigerant is or comprises propane (R290) or propylene (R1270).
- the fins are made of metal.
- the fins and/or the metallic pipes are made of, or comprise, aluminum or aluminum alloy, or copper, or copper alloy.
- the laundry treating appliance is a tumble drier or washer-drier, and the operating fluid is air.
- the laundry treating appliance is a laundry washing machine
- the operating fluid is water, or water mixed with a washing/rinsing agent.
- the laundry treating appliance 10 illustrated in figure 1 is a tumble drier of the "horizontal axis type"; it is however clear that the invention can be applied, without any substantial modification, also to tumble driers of the vertical axis" type, and to washing machines and washer driers, both of the "horizontal axis” and of the “vertical axis” type.
- the laundry treating appliance (being it a tumble drier 10, or a washing machine or washer-drier, not illustrated) comprises a cabinet 20, or housing, preferably parallelepiped, configured to be positioned on a horizontal surface 2, for example the floor of a building, preferably by suitable feet 21, one or more of which can have, advantageously, an adjustable height, so as to adapt to a possible not perfect planarity of the horizontal surface 2.
- an access opening is preferably obtained, advantageously selectively closable by a loading/unloading door 4, preferably hinged to the frontal wall 20a.
- the laundry treating appliance (being it a tumble drier 10, or a washing machine or washer-drier) comprises a drum 30 rotatably housed within the cabinet 20, in which the laundry, not illustrated, can be loaded.
- the cabinet 20 also houses a washing tub, not illustrated, preferably suspended to the cabinet through springs and dumpers, also not illustrated, in which the drum 30 is rotatably contained.
- the laundry treating appliance 10 comprises a circulating system 60 configured for circulating an operating fluid through the drum 3.
- the circulating system 60 can define a closed circuit for the operating fluid (i.e. the operating fluid remains within the closed circuit during the laundry treating process, and the same fluid, opportunely treated, passed repeatedly through the drum 30), or it can define an opened circuit for the operating fluid (i.e. the operating fluid is loaded within the laundry treating appliance 10 at a certain point of the laundry treating process, and it is drained from the laundry treating appliance 10 at another point of the laundry treating process).
- the operating fluid is or comprises air (represented by arrows 50), and the circulating system preferably comprises an air circuit 61 and one or more fans 62 configured for circulating such air 50 through the drum 3 and the air circuit 61.
- the laundry treating appliance is a tumble drier 10
- it can also advantageously comprise a lint filter 63, arranged in the air circuit 61 for trapping lint or fluff released from the laundry.
- the operating fluid is or comprises water, or water mixed with a washing/rinsing additive
- the circulating system preferably comprises a water inlet circuit, not illustrated, adapted to feed water into the tub, also not illustrated, and a drain circuit, also not illustrated, adapted for draining washing/rinsing liquid from the machine.
- the laundry treating appliance 10 advantageously comprises a heat pump system 40, configured for heating the operating fluid, for example, in case of a tumble drier, the air 50.
- the heat pump system 40 can also be configured for cooling and dehumidifying the operating fluid.
- the heat pump system 40 comprises a compressor, not illustrated, an expansion valve, also not illustrated, two heat exchangers 70a, 70b (one operating as a condenser, and the other as an evaporator), and conduits, not illustrated, fluidly connecting such elements in a closed circuit.
- a flammable refrigerant flows through the compressor, the condenser 70a, the expansion valve and the evaporator 70b, and through the conduits connecting these to one another.
- the flammable refrigerant releases heat to the operating fluid by means of the condenser 70a and extracts heat and humidity from the operating fluid by means of the evaporator 70b.
- the compressor converts electromechanical power to thermal power by compressing the flammable refrigerant in the refrigerant circuit.
- the flammable refrigerant is or comprises a hydrocarbon, preferably propane (R290) or propylene (R1270).
- the heat exchangers for example the condenser 70a and/or the evaporator 70b, comprise a plurality of metallic pipes 80 (called also simply pipes) wherein the flammable refrigerant flows, and a plurality of fins 90 (advantageously metallic), stacked spaced and parallel to one another, each provided with four or more through-holes 100 suitable for housing one of the metallic pipes 80.
- the through-holes 100 of any fin 90 are respectively aligned with the through-holes 100 of the rest of the fins 90.
- the perimeter edges 99 of the stacked fins 90 define as a whole an envelope surface, illustrated in figures and 18 with a dotted line numbered 92, comprising at least a plane portion 93.
- the fins 90 have a rectangular or square plan, in which case the envelope surface 92 comprises four plane portions, corresponding to the four sides of the rectangle or square.
- the width of the fins 90 is comprised between 65 mm and 145 mm, more preferably between 95 mm and 125 mm.
- the height of the fins 90 is comprised between 110 mm and 185 mm, more preferably between 145 mm and 165 mm.
- the overall length of the stacked fins 90 is comprise between 330 mm and 370 mm, more preferably between 200 mm and 250 mm.
- the fins 90 are made of, or comprise, aluminum or aluminum alloy, or copper, or copper alloy.
- the more metallic pipes 80 are made of, or comprise, aluminum or aluminum alloy, or copper or copper alloy.
- the metallic pipes 80 comprise two or more straight pipes 81, parallel one another and perpendicular to the fins 90, each one of the two or more straight pipes 81 being housed in one of the through-holes 100 of the fins 90.
- the straight pipes 81 are fitted, with their lateral surface into close contact with the border of the respective through-holes 100, so as to obtain an effective heat-exchange between them; this can be obtained by radially expanding such straight pipes 81 by suitable tools, not illustrated.
- the two or more straight pipes 81 are connected in twos, at one end thereof, by a curved pipe 82, to define as a whole a single duct 83 wherein the flammable refrigerant flows.
- Such a single duct 83 advantageously comprises an inlet portion 831 and an outlet portion 832, configured for allowing the flammable refrigerant respectively to enter/exit the single duct; advantageously, the inlet portion 831 and the outlet portion 832 are fluidly connected or connectable to the other elements of the heat pump system 40, so as to allow circulation of the flammable refrigerant through the respective heat exchanger 70a or 70b.
- the inlet portion 831 and an outlet portion 832 protrude both from a same terminal fin 91 of the plurality of fins 90, which simplifies the connection of the single duct 83 to the other conduits of the heat pump system 40.
- At least two through-holes 101 of the four or more through-holes 100 of each fin 90 houses one of the metallic pipes 80.
- At least two through-holes 102 of the four or more through-holes 100 of each fin 90 do not house any of the metallic pipes 80 (or in other words they are not crossed by any metallic pipe 80, or are free, or empty, from metallic pipes 80).
- the number of metallic pipes 80, and therefore the overall internal volume of the single duct 83 composed of such metallic pipes 80, wherein the flammable refrigerant flows, is reduced, while the number of fins 90, and therefore the overall length of their stack, can be relatively high, so as to obtain a desired overall thermal exchange surface.
- each fin 90 is positioned on the respective fin 90 to define at least one first row 160 perpendicular to the plane portion 93 of the envelope surface 92 and/or at least one second row 150 perpendicular to the first rows 160.
- each through-hole 10 can be all aligned along to a single first row 160, or they can be all aligned along a single second row 150, or they can be positioned, as illustrated for example in figure 19 , each at a vertex of a rectangle or square, so as to define, as a whole, two first rows 160 and two second rows 150.
- At least two through-holes of the four or more through-holes 100 not housing any of the pipes 80 belong to a same second row 150.
- At least two through-holes 102 of the four or more through-holes 100 not housing any metallic pipe 80 belong to a same first row 160.
- the fins 90 comprise at least two second rows 150, and, like for example ion the advantageous embodiments of figures 6 and 11 , at least two through-holes 102 not housing any metallic pipe 80 belong to two contiguous second rows 150.
- the fins 90 comprise at least two of first rows 160, and, like for example in the advantageous embodiments of figure 11 and 16 , at least two through-holes 102 not housing any metallic pipe 80 belong to two contiguous first rows 160.
- all the through-holes 100 of a first row 160 and/or of one second row 150 do not house any of metallic pipe 80.
- the invention achieves the proposed aim and objects, since it allows obtaining, using commercially available fins (which have prefixed dimensions and numbers of through-holes), an evaporator for the heat pump system of a laundry treating appliance having a relatively small volume of the single duct wherein the refrigerant flows, and a high overall thermal exchange surface; this evaporator, which production costs are therefore kept reduced (since it does not use customized fins), allows using in the heat pump system a flammable refrigerant, like for example propane (R290) or propylene (R1270), which have a very low Global Warming Potential (GWP), fulfilling the regulation requirements related to flammable refrigerant charge, and keeping at the same time a high energetic efficiency.
- a flammable refrigerant like for example propane (R290) or propylene (R1270), which have a very low Global Warming Potential (GWP), fulfilling the regulation requirements related to flammable refrigerant charge, and keeping at the same time a high energetic efficiency.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
Description
- The present invention refers to a laundry treating appliance, for example a laundry washing machine (called also washing machine), a laundry washer-drier (called also washer-drier), a tumble drier, having a heat pump system.
- Traditional laundry treating appliances, for example washing machines, washer-driers, tumble driers, typically comprise a cabinet containing a rotatable drum wherein the laundry to be treated (i.e. washed and/or dried) can be loaded.
- An operating fluid (e.g., depending on the kind of laundry treating appliance and on the treating process to be applied, water, water mixed with a washing/rinsing additive, air), is circulated through the drum by a circulating system (comprising, for example pumps, valves, fans, etc., depending on the kind of fluid to be circulated).
- In some known laundry treating appliances, the operating fluid is heated and/or cooled/dehumidified by a heat pump system, typically comprising a compressor, an expansion valve, two heat exchangers (one operating as a condenser, and the other as an evaporator), and conduits fluidly connecting such elements in a closed circuit.
- A heat pump system has an improved energy efficiency with respect to traditional heating systems using an electrical heater as heat source.
- Some refrigerant flows through the compressor, the condenser, the expansion valve and the evaporator, and through the conduits connecting these to one another.
- The refrigerant releases heat to the operating fluid by means of the condenser, and extracts heat and humidity from the operating fluid by means of the evaporator. The compressor converts electromechanical power to thermal power by compressing the refrigerant in the refrigerant circuit Currently, the refrigerants mainly used in heat pump systems of known laundry treating appliances are hydrofluorocarbon (HFC) refrigerants, in particular the ones known as R134a and R407C. Unfortunately, these refrigerants have a high Global Warming Potential (GWP), so alternative refrigerants start to be more and more used in different industries.
- Possible alternative refrigerants used for replacing hydrofluorocarbon (HFC) refrigerants in heat pump systems of laundry treating appliances are hydrocarbons refrigerants, such as propane (R290) and propylene (R1270).
- These alternative refrigerants have a negligible impact on GWP and their thermo-physical properties makes them very suitable for the typical working conditions of heat pump systems of laundry treating appliances, in particular tumble driers and washer-driers.
- The downside of these alternative refrigerants is that they are flammable, and therefore, for limiting possible risks, regulations (e.g. the IEC 60335-2-11 standard) limit the amount of refrigerant that can be charged in the heat pump system to 150 g (grams).
- Inside the heat pump system, when the compressor is switched ON, most of the refrigerant can be found inside the condenser, since in this heat exchanger the refrigerant is at high pressure and, for a portion thereof, in liquid state, so with a very high density.
- The evaporator, on the contrary, works at low pressure, and the refrigerant contained therein is mainly a liquid-vapour mixture and a superheated vapour, so its density is quite low. It has been observed that limiting to 150 g the refrigerant charge could negatively affect the performances of the heat pump system, in particular its energy efficiency.
- There is the need, therefore, to reduce the volume of the components of the heat exchangers wherein the refrigerant flows, so as to limit the refrigerant charge required by the system. On the other hand, it's important not reducing too much the external surface area, so as to keep a good heat exchange performance.
- A known kind of heat exchanger, widely used in heat pump systems of laundry treating appliances, comprises a plurality of fins, typically made of aluminum and having a rectangular plane, stacked in spaced and parallel planes; the fins comprise a plurality of through-holes wherein a plurality straight pipes, made of copper or aluminum, parallel one another and perpendicular to the fins, are fitted, with their lateral surface into close contact with the border of the through-holes, so as to obtain an effective heat-exchange.
- The straight pipes are connected in twos, at one end, by a curved pipe, to define as a whole a single duct wherein the refrigerant flows; this single duct has an inlet portion and an outlet portion protruding from the stack of fins, and connectable to the rest of the heat pump system circuit.
- During the functioning of the heat pump system, the operating fluid flows through the gaps between the fins, exchanging heat with the latter, and therefore with the refrigerant flowing in the pipes, which are thermally connected to the fins.
- The fins used for producing such heat exchangers are typically produced and sold with standardized dimensions, and with a fixed number of through-holes; the producers of laundry treating appliances using such a kind of heat exchangers, in order to keep reduced the production costs, typically purchase the available fins having external dimensions (i.e. length and width) suitable for their appliances, stack them in spaced and parallel planes, and insert in all the through-holes the same number of straight pipes; typically the pipes are fastened to the through-holes by radially expanding such pipes by suitable tools. Then, the straight pipes are connected in twos, at one end, by a curved pipe, to define as a whole the single duct wherein the refrigerant flows.
- Since the external dimensions of the fins and the number of through-holes is fixed, the freedom of design is very small. In particular, in order to reduce the overall volume of the single duct wherein the refrigerant flows, there is the possibility to reduce the number of stacked fins, and therefore the length of the straight pipes composing the single duct; unfortunately, reducing the number of fins reduces also the overall thermal exchange surface of the heat exchanger, which reduces the energy efficiency of the heat pump system.
- The aim of the present invention is therefore obtaining a laundry treating appliance using a heat pump system, having a reduced Global Warming Potential (GWP) and an improved efficiency, and at the same time keeping reduced the production costs.
- Within this aim, a further object of the invention is obtaining a laundry treating appliance fulfilling the safety regulations related to the refrigerant of the heat pump system, without reducing the overall energy efficiency, and and at the same time keeping reduced the production costs.
- Applicant has found that, by leaving empty (i.e. not inserting pipes therein) two or more through-holes of the fins of a heat exchanger of the heat pump system, it is possible reducing the overall internal volume of the single duct of the heat exchanger wherein the refrigerant flows without reducing the length of the single pipes composing such a single duct nor the number of fins, and therefore without reducing the overall thermal exchange surface, also using standard fins available in the market having a prefixed number of through-holes, and so without using customized fins which could increase the production costs.
- This inventive solution allows using in the heat pump system a flammable refrigerant, like for example propane (R290) or propylene (R1270), which have a very low Global Warming Potential (GWP), but that needs to be used in small quantities, and therefore requires a reduced volume of the single duct of the heat exchanger wherein the refrigerant flows.
- In particular, above aim is solved by a laundry treating appliance comprising:
- a cabinet;
- a drum, rotatably housed within the cabinet, in which laundry can be loaded;
- a heat pump system, using one or more flammable refrigerants, configured for exchanging heat with an operating fluid;
- a circulating system configured for circulating the operating fluid through the drum;
wherein the heat pump system comprises a heat exchanger comprising:- a plurality of metallic pipes wherein the flammable refrigerant flows;
- a plurality of fins, stacked spaced and parallel to one another, each provided with four or more through-holes suitable for housing one of the metallic pipes,
- Advantageously, the four or more through-holes of any fin of the plurality of fins are respectively aligned with the four or more through-holes of the rest of the plurality of fins.
- In an advantageous embodiment, the perimeter edges of the stacked fins define as a whole an envelope surface (i.e. a surface that is tangent to the perimeter edges of all the stacked fins) comprising at least a plane portion, and wherein the four or more through-holes of each of the fins are positioned on the respective fin to define at least one first row perpendicular to the plane portion and/or at least one second row perpendicular to the first rows.
- In a preferred embodiment, the at least two through-holes of the four or more through-holes not housing any of the metallic pipes belong to a same second row.
- More preferably, in the same second row, between at least two through-holes not housing any of the metallic pipes there is at least one of the through-holes housing one of the metallic pipes; this advantageous embodiment ensures that the distribution of the metallic pipes with respect to the fins is quite uniform, and therefore that the heat distribution within the heat exchanger is quite uniform.
- In a further advantageous embodiment, at least two through-holes of the four or more through-holes not housing any of the metallic pipes belong to a same first row.
- Preferably, in this case in this same first row, between the at least two through-holes not housing any of the metallic pipes there is at least one of the through-holes housing one of the metallic pipes; also this advantageous embodiment ensures that the distribution of the metallic pipes with respect to the fins is quite uniform, and therefore that the heat distribution within the heat exchanger is quite uniform. In a further advantageous embodiment, the fins comprise at least two second rows, and at least two through-holes of the four or more through-holes not housing any of the metallic pipes belong to two contiguous second rows.
- In a further advantageous embodiment, the fins comprise at least two perpendicular rows, and at least two through-holes of the four or more through-holes not housing any of the metallic pipes belong to two contiguous perpendicular rows.
- It is underlined that stating that two rows are contiguous means that there aren't other rows positioned between such two rows.
- In another advantageous embodiment, all the through-holes of the at least one first row and/or of the at least one second row do not house any of the metallic pipes.
- In a preferred embodiment, the metallic pipes comprise two or more straight pipes, parallel one another and perpendicular to the fins, each one of the two or more straight pipes being housed in one of the four or more through-holes of the fins, the two or more straight pipes being connected in twos, at one end, by a curved pipe, to define as a whole a single duct wherein the flammable refrigerant flows.
- Further preferably, the single duct comprises an inlet portion and an outlet portion configured for allowing said flammable refrigerant respectively to enter/exit said single duct.
- More preferably, the inlet portion and the outlet portion protrude both from a same terminal fin of the plurality of fins.
- Preferably, the flammable refrigerant is or comprises a hydrocarbon.
- More preferably, the flammable refrigerant is or comprises propane (R290) or propylene (R1270).
- In a preferred embodiment, the fins are made of metal.
- More preferably, the fins and/or the metallic pipes are made of, or comprise, aluminum or aluminum alloy, or copper, or copper alloy.
- In an advantageous embodiment, the laundry treating appliance is a tumble drier or washer-drier, and the operating fluid is air.
- In another advantageous embodiment, the laundry treating appliance is a laundry washing machine, and the operating fluid is water, or water mixed with a washing/rinsing agent.
- Other advantages and features of a laundry treating appliance according to the present invention will be clear from the following detailed description, provided only as a not limitative example, in which:
-
Fig 1 is a schematic lateral cross section of a laundry treating appliance, in particular a tumble drier, according to the invention; -
Fig. 2 is a perspective view of a first embodiment of heat exchanger of a laundry treating appliance according to the invention; -
Fig. 3 is a schematic plan view of a fin of a laundry treating appliance according to the invention; -
Fig. 4 is a lateral view of the heat exchanger ofFig.2 ; -
Fig. 5 is a plan view of the heat exchanger ofFig.2 ; -
Fig. 6 is a frontal view of the heat exchanger ofFig.2 ; -
Fig. 7 is a rear view of the heat exchanger ofFig.2 ; -
Fig. 8 is a perspective view of a second embodiment of heat exchanger of a laundry treating appliance according to the invention; -
Fig. 9 is a lateral view of the heat exchanger ofFig.8 ; -
Fig. 10 is a plan view of the heat exchanger ofFig.8 ; -
Fig. 11 is a frontal view of the heat exchanger ofFig.8 ; -
Fig. 12 is a rear view of the heat exchanger ofFig.8 ; -
Fig. 13 is a perspective view of a second embodiment of heat exchanger of a laundry treating appliance according to the invention; -
Fig. 14 is a lateral view of the heat exchanger ofFig.13 ; -
Fig. 15 is a plan view of the heat exchanger ofFig.13 ; -
Fig. 16 is a frontal view of the heat exchanger ofFig.13 ; -
Fig. 17 is a rear view of the heat exchanger ofFig.13 -
Fig. 18 is a lateral schematic view of the stacked fins of an heat exchanger according to the invention; -
Fig. 19 is a schematic view of four through-holes of a fin of a heat exchanger according to the invention. - In the figures, same parts are indicated with the same reference numbers.
- Advantageously, the
laundry treating appliance 10 illustrated infigure 1 is a tumble drier of the "horizontal axis type"; it is however clear that the invention can be applied, without any substantial modification, also to tumble driers of the vertical axis" type, and to washing machines and washer driers, both of the "horizontal axis" and of the "vertical axis" type. - The laundry treating appliance (being it a tumble drier 10, or a washing machine or washer-drier, not illustrated) comprises a
cabinet 20, or housing, preferably parallelepiped, configured to be positioned on ahorizontal surface 2, for example the floor of a building, preferably bysuitable feet 21, one or more of which can have, advantageously, an adjustable height, so as to adapt to a possible not perfect planarity of thehorizontal surface 2. - Advantageously, in the
frontal wall 20a of thecabinet 20 an access opening, not illustrated, is preferably obtained, advantageously selectively closable by a loading/unloading door 4, preferably hinged to thefrontal wall 20a. - The laundry treating appliance (being it a tumble drier 10, or a washing machine or washer-drier) comprises a
drum 30 rotatably housed within thecabinet 20, in which the laundry, not illustrated, can be loaded. - If the laundry treating appliance is a washing machine or a washer-drier, both not illustrated, the
cabinet 20 also houses a washing tub, not illustrated, preferably suspended to the cabinet through springs and dumpers, also not illustrated, in which thedrum 30 is rotatably contained. - The
laundry treating appliance 10 comprises a circulatingsystem 60 configured for circulating an operating fluid through the drum 3. - It is underlined that the circulating
system 60 can define a closed circuit for the operating fluid (i.e. the operating fluid remains within the closed circuit during the laundry treating process, and the same fluid, opportunely treated, passed repeatedly through the drum 30), or it can define an opened circuit for the operating fluid (i.e. the operating fluid is loaded within thelaundry treating appliance 10 at a certain point of the laundry treating process, and it is drained from thelaundry treating appliance 10 at another point of the laundry treating process). - In the advantageous embodiment in which the
laundry treating appliance 10 is a tumble drier, like the advantageous example offigure 1 , or a washer drier, not illustrated, the operating fluid is or comprises air (represented by arrows 50), and the circulating system preferably comprises anair circuit 61 and one ormore fans 62 configured for circulatingsuch air 50 through the drum 3 and theair circuit 61. - If the laundry treating appliance is a tumble drier 10, it can also advantageously comprise a
lint filter 63, arranged in theair circuit 61 for trapping lint or fluff released from the laundry. - If the laundry treating appliance is a washing machine or a washer drier, both not illustrated, the operating fluid is or comprises water, or water mixed with a washing/rinsing additive, and the circulating system preferably comprises a water inlet circuit, not illustrated, adapted to feed water into the tub, also not illustrated, and a drain circuit, also not illustrated, adapted for draining washing/rinsing liquid from the machine.
- The
laundry treating appliance 10 advantageously comprises aheat pump system 40, configured for heating the operating fluid, for example, in case of a tumble drier, theair 50. Advantageously, theheat pump system 40 can also be configured for cooling and dehumidifying the operating fluid. - Preferably, the
heat pump system 40 comprises a compressor, not illustrated, an expansion valve, also not illustrated, twoheat exchangers - A flammable refrigerant flows through the compressor, the
condenser 70a, the expansion valve and the evaporator 70b, and through the conduits connecting these to one another. - The flammable refrigerant releases heat to the operating fluid by means of the
condenser 70a and extracts heat and humidity from the operating fluid by means of the evaporator 70b. The compressor converts electromechanical power to thermal power by compressing the flammable refrigerant in the refrigerant circuit. - The flammable refrigerant is or comprises a hydrocarbon, preferably propane (R290) or propylene (R1270).
- Advantageously, the heat exchangers, for example the
condenser 70a and/or the evaporator 70b, comprise a plurality of metallic pipes 80 (called also simply pipes) wherein the flammable refrigerant flows, and a plurality of fins 90 (advantageously metallic), stacked spaced and parallel to one another, each provided with four or more through-holes 100 suitable for housing one of themetallic pipes 80. Advantageously, the through-holes 100 of anyfin 90 are respectively aligned with the through-holes 100 of the rest of thefins 90. - Advantageously, the perimeter edges 99 of the stacked
fins 90 define as a whole an envelope surface, illustrated in figures and 18 with a dotted line numbered 92, comprising at least aplane portion 93. - Preferably, the
fins 90 have a rectangular or square plan, in which case theenvelope surface 92 comprises four plane portions, corresponding to the four sides of the rectangle or square. - Preferably, the width of the
fins 90 is comprised between 65 mm and 145 mm, more preferably between 95 mm and 125 mm. Preferably, the height of thefins 90 is comprised between 110 mm and 185 mm, more preferably between 145 mm and 165 mm. Preferably, the overall length of the stackedfins 90 is comprise between 330 mm and 370 mm, more preferably between 200 mm and 250 mm. - Advantageously, the
fins 90 are made of, or comprise, aluminum or aluminum alloy, or copper, or copper alloy. - Advantageously, the more
metallic pipes 80 are made of, or comprise, aluminum or aluminum alloy, or copper or copper alloy. - Preferably, the
metallic pipes 80 comprise two or morestraight pipes 81, parallel one another and perpendicular to thefins 90, each one of the two or morestraight pipes 81 being housed in one of the through-holes 100 of thefins 90. Advantageously, thestraight pipes 81 are fitted, with their lateral surface into close contact with the border of the respective through-holes 100, so as to obtain an effective heat-exchange between them; this can be obtained by radially expanding suchstraight pipes 81 by suitable tools, not illustrated. - Advantageously, the two or more
straight pipes 81 are connected in twos, at one end thereof, by acurved pipe 82, to define as a whole asingle duct 83 wherein the flammable refrigerant flows. - Such a
single duct 83 advantageously comprises aninlet portion 831 and anoutlet portion 832, configured for allowing the flammable refrigerant respectively to enter/exit the single duct; advantageously, theinlet portion 831 and theoutlet portion 832 are fluidly connected or connectable to the other elements of theheat pump system 40, so as to allow circulation of the flammable refrigerant through therespective heat exchanger - Advantageously, like in the examples of attached figures, the
inlet portion 831 and anoutlet portion 832 protrude both from asame terminal fin 91 of the plurality offins 90, which simplifies the connection of thesingle duct 83 to the other conduits of theheat pump system 40. - Advantageously, at least two through-
holes 101 of the four or more through-holes 100 of eachfin 90 houses one of themetallic pipes 80. - Advantageously, at least two through-
holes 102 of the four or more through-holes 100 of eachfin 90 do not house any of the metallic pipes 80 (or in other words they are not crossed by anymetallic pipe 80, or are free, or empty, from metallic pipes 80). - In this way, the number of
metallic pipes 80, and therefore the overall internal volume of thesingle duct 83 composed of suchmetallic pipes 80, wherein the flammable refrigerant flows, is reduced, while the number offins 90, and therefore the overall length of their stack, can be relatively high, so as to obtain a desired overall thermal exchange surface. - In an advantageous embodiment, four or more through-
holes 100 of eachfin 90 are positioned on therespective fin 90 to define at least onefirst row 160 perpendicular to theplane portion 93 of theenvelope surface 92 and/or at least onesecond row 150 perpendicular to thefirst rows 160. - For example, in case four through-
holes 10, they can be all aligned along to a singlefirst row 160, or they can be all aligned along a singlesecond row 150, or they can be positioned, as illustrated for example infigure 19 , each at a vertex of a rectangle or square, so as to define, as a whole, twofirst rows 160 and twosecond rows 150. - In advantageous embodiments, like for example the ones illustrated in
figures 6 ,11 and16 , at least two through-holes of the four or more through-holes 100 not housing any of thepipes 80 belong to a samesecond row 150. - In an advantageous embodiment, like for example the one illustrated in
figure 6 , in a samesecond row 150, between at least two through-holes 102 not housing anymetallic pipes 80 there is at least one through-hole 101 housing onemetallic pipes 80. - In advantageous embodiments, like for example the one illustrated in
figure 6 , at least two through-holes 102 of the four or more through-holes 100 not housing anymetallic pipe 80 belong to a samefirst row 160. - In a preferred embodiment, like for example the one illustrated in
figure 6 , in a samefirst row 160, between two through-holes 102 not housing anymetallic pipes 80 there is at least one through-hole 101 housing onemetallic pipe 80. - Preferably, the
fins 90 comprise at least twosecond rows 150, and, like for example ion the advantageous embodiments offigures 6 and11 , at least two through-holes 102 not housing anymetallic pipe 80 belong to two contiguoussecond rows 150. In a further advantageous embodiment, thefins 90 comprise at least two offirst rows 160, and, like for example in the advantageous embodiments offigure 11 and16 , at least two through-holes 102 not housing anymetallic pipe 80 belong to two contiguousfirst rows 160. - In a further advantageous embodiment, not illustrated, all the through-
holes 100 of afirst row 160 and/or of onesecond row 150 do not house any ofmetallic pipe 80. - Anyway, different positionings of the at least two through-
holes 102 are possible. - It is seen therefore how the invention achieves the proposed aim and objects, since it allows obtaining, using commercially available fins (which have prefixed dimensions and numbers of through-holes), an evaporator for the heat pump system of a laundry treating appliance having a relatively small volume of the single duct wherein the refrigerant flows, and a high overall thermal exchange surface; this evaporator, which production costs are therefore kept reduced (since it does not use customized fins), allows using in the heat pump system a flammable refrigerant, like for example propane (R290) or propylene (R1270), which have a very low Global Warming Potential (GWP), fulfilling the regulation requirements related to flammable refrigerant charge, and keeping at the same time a high energetic efficiency.
wherein at least two through-holes of the four or more through-holes of each one of the fins do not house any of the metallic pipes (or, in other words, they are not crossed by any metallic pipe, or are free, or empty, from metallic pipes).
Claims (15)
- A laundry treating appliance (10) comprising:- a cabinet (20);- a drum (30), rotatably housed within said cabinet (20), in which laundry can be loaded;- a heat pump system (40), using one or more flammable refrigerants, configured for exchanging heat with an operating fluid (50);- a circulating system (60) configured for circulating said operating fluid (50) through said drum (30);wherein each of at least two through-holes (101) of said four or more through-holes (100) of each one of said fins (90) houses one of said metallic pipes (80),
wherein said heat pump system (40) comprises a heat exchanger (70a, 70b) comprising:- a plurality of metallic pipes (80) wherein said flammable refrigerant flows;- a plurality of fins (90), stacked spaced and parallel to one another, each provided with four or more through-holes (100) suitable for housing one of said metallic pipes (80),
characterized in that
at least two through-holes (102) of said four or more through-holes (100) of each one of said fins (90) do not house any of said metallic pipes (80). - A laundry treating appliance (10) according to claim 1, wherein the perimeter edges (99) of said stacked fins (90) define as a whole an envelope surface (92) comprising at least a plane portion (93), and wherein said four or more through-holes (100) of each of said fins (90) are positioned on the respective fin (90) to define at least one first row (160) perpendicular to said plane portion (93) and/or at least one second row (150) perpendicular to said first rows (160).
- A laundry treating appliance (10) according to claim 2, wherein at least two through-holes (102) of said four or more through-holes (100) not housing any of said metallic pipes (80) belong to a same second row (150).
- A laundry treating appliance (10) according to claim 3, wherein in said same second row (150), between said at least two through-holes (102) not housing any of said metallic pipes (80) there is at least one of said through-holes (101) housing one of said metallic pipes (80).
- A laundry treating appliance (10) according to claim 2 or 3 or 4, wherein at least two through-holes (102) of said four or more through-holes (100) not housing any of said metallic pipes (80) belong to a same first row (160).
- A laundry treating appliance (10) according to claim 5, wherein in said same first row (160), between said at least two through-holes (102) not housing any of said metallic pipes (80) there is at least one of said through-holes (101) housing one of said metallic pipes (80).
- A laundry treating appliance (10) according to one or more of claims 2 to 6, wherein said fins (90) comprise at least two of said second rows (150), and wherein at least two through-holes (102) of said four or more through-holes (100) not housing any of said metallic pipes (80) belong to two contiguous second rows (150).
- A laundry treating appliance (10) according to one or more of claims 2 to 7, wherein said fins (90) comprise at least two of said first rows (160), and wherein at least two through-holes (102) of said four or more through-holes (100) not housing any of said metallic pipes (80) belong to two contiguous first rows (160).
- A laundry treating appliance (10) according to claim 2, wherein all the through-holes (100) of said at least one first row (160) and/or of said at least one second row (150) do not house any of said metallic pipes (80).
- A laundry treating appliance (100) according to one or more of the previous claims, wherein said metallic pipes (80) comprise two or more straight pipes (81), parallel one another and perpendicular to said fins (90), each one of said two or more straight pipes (81) being housed in one of said four or more through-holes (100) of said fins (90), said two or more straight pipes (81) being connected in twos, at one end, by a curved pipe (82), to define as a whole a single duct (83) wherein said flammable refrigerant flows.
- A laundry treating appliance (100) according to claim 10, wherein said single duct (83) comprises an inlet portion (831) and an outlet portion (832) configured for allowing said flammable refrigerant respectively to enter/exit said single duct (83).
- A laundry treating appliance (100) according to claim 11, wherein said inlet portion (831) and said outlet portion (832) protrude both from a same terminal fin (91) of said plurality of fins (90).
- A laundry treating appliance (10) according to one or more of the previous claims, wherein said flammable refrigerant is or comprises a hydrocarbon or is or comprises propane (R290) or propylene.
- A laundry treating appliance (10) according to one or more of the previous claims, wherein said fins (90) and/or said metallic pipes (80) are made of, or comprise, aluminum or aluminum alloy, or copper, or copper alloy.
- A laundry treating appliance (10) according to one or more of the previous claims, wherein said laundry treating appliance (10) is a tumble drier (11) or a washer-drier, and said operating fluid (50) is air or wherein said laundry treating appliance (10) is a laundry washing machine, and said operating fluid (50) is water, or water mixed with a washing/rinsing agent.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20169725.7A EP3896213A1 (en) | 2020-04-15 | 2020-04-15 | A laundry treating appliance having a heat pump system |
AU2021202148A AU2021202148A1 (en) | 2020-04-15 | 2021-04-08 | A laundry treating appliance having a heat pump system |
CN202110406767.4A CN113529382A (en) | 2020-04-15 | 2021-04-15 | Laundry treatment apparatus having heat pump system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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EP20169725.7A EP3896213A1 (en) | 2020-04-15 | 2020-04-15 | A laundry treating appliance having a heat pump system |
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Publication Number | Publication Date |
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EP3896213A1 true EP3896213A1 (en) | 2021-10-20 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP20169725.7A Pending EP3896213A1 (en) | 2020-04-15 | 2020-04-15 | A laundry treating appliance having a heat pump system |
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EP (1) | EP3896213A1 (en) |
CN (1) | CN113529382A (en) |
AU (1) | AU2021202148A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015120487A1 (en) * | 2014-11-26 | 2016-06-02 | Akg Thermotechnik International Gmbh & Co. Kg | heat exchangers |
EP3066406A1 (en) * | 2013-11-06 | 2016-09-14 | BSH Hausgeräte GmbH | Heat pump for a household appliance |
EP3279393A1 (en) * | 2016-08-01 | 2018-02-07 | LG Electronics Inc. | Clothes treatment apparatus |
-
2020
- 2020-04-15 EP EP20169725.7A patent/EP3896213A1/en active Pending
-
2021
- 2021-04-08 AU AU2021202148A patent/AU2021202148A1/en active Pending
- 2021-04-15 CN CN202110406767.4A patent/CN113529382A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3066406A1 (en) * | 2013-11-06 | 2016-09-14 | BSH Hausgeräte GmbH | Heat pump for a household appliance |
DE102015120487A1 (en) * | 2014-11-26 | 2016-06-02 | Akg Thermotechnik International Gmbh & Co. Kg | heat exchangers |
EP3279393A1 (en) * | 2016-08-01 | 2018-02-07 | LG Electronics Inc. | Clothes treatment apparatus |
Non-Patent Citations (1)
Title |
---|
DOMANSKI P A ET AL: "Performance of a finned-tube evaporator optimized for different refrigerants and its effect on system efficiency", INTERNATIONAL JOURNAL OF REFRIGERATION, ELSEVIER, AMSTERDAM, NL, vol. 28, no. 6, 1 September 2005 (2005-09-01), pages 820 - 827, XP004998949, ISSN: 0140-7007, DOI: 10.1016/J.IJREFRIG.2005.02.003 * |
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AU2021202148A1 (en) | 2021-11-04 |
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