WO2014146953A1 - Appareil de traitement de linge ayant une pompe à chaleur - Google Patents

Appareil de traitement de linge ayant une pompe à chaleur Download PDF

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Publication number
WO2014146953A1
WO2014146953A1 PCT/EP2014/054861 EP2014054861W WO2014146953A1 WO 2014146953 A1 WO2014146953 A1 WO 2014146953A1 EP 2014054861 W EP2014054861 W EP 2014054861W WO 2014146953 A1 WO2014146953 A1 WO 2014146953A1
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WO
WIPO (PCT)
Prior art keywords
heat exchanger
auxiliary heat
air
rear wall
refrigerant
Prior art date
Application number
PCT/EP2014/054861
Other languages
English (en)
Inventor
Gianpiero Artico
Original Assignee
Electrolux Appliances Aktiebolag
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 Electrolux Appliances Aktiebolag filed Critical Electrolux Appliances Aktiebolag
Priority to AU2014234494A priority Critical patent/AU2014234494A1/en
Publication of WO2014146953A1 publication Critical patent/WO2014146953A1/fr

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Classifications

    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 

Definitions

  • the invention relates to a laundry treatment apparatus having a heat pump system in which process air for laundry treatment is dehumidified and heated.
  • a dryer having a heat pump system for dehumidifying and heating process air is known from WO 2008/086933 Al.
  • An auxiliary condenser cooled by ambient air is used to remove heat from the refrigerant loop in the heat pump system.
  • an auxiliary condenser of the heat pump system is arranged in the bottom section between an ambient air blower and a compressor such that the ambient air cools and removes excessive heat from both, the auxiliary condenser and the compressor.
  • a heat pump system is arranged in the bottom section.
  • the heat pump system has refrigerant loop comprising a first heat exchanger for heating a refrigerant and cooling the process air, a second heat exchanger for cooling the refrigerant and heating the process air, a refrigerant expansion device, a compressor, and an auxiliary heat exchanger.
  • the auxiliary heat exchanger is arranged in the refrigerant loop between the second heat exchanger and the first heat exchanger for additional cooling of the refrigerant.
  • a laundry treatment apparatus in particular dryer or washing machine having drying function, comprises a cabinet having a front wall, a rear wall, side walls and top cover, a laundry storing chamber arranged inside the cabinet for treating laundry using process air, a process air loop for circulating the process air through the laundry storing 5 chamber, and a heat pump system for dehumidifying and heating the process air, the heat pump system having a refrigerant loop.
  • the refrigerant loop comprises a first heat exchanger for heating the refrigerant and cooling the process air, a second heat exchanger for cooling the refrigerant and heating the process air, a refrigerant expansion device and a compressor.
  • an auxiliary heat exchanger is provided which is arranged at the external side of the rear wall.
  • the auxiliary heat exchanger is provided such that it removes heat (energy) from the refrigerant circulated in the refrigerant loop and may function as an auxiliary condenser or 5 as gas cooler especially working as refrigerant cooler in a transcritical or totally
  • the laundry treatment apparatus has a cabinet comprising a front wall, a rear wall, side walls, a top cover or cover shell, and a base section.
  • the front wall may comprise a front top panel with an operation section and/or a front bottom panel providing an outer front cover of the base section.
  • the cabinet defines the limit or outer envelope/cabinet between the internal side of the apparatus and the external side of the apparatus.
  • the cabinet may 5 include protruding sections of one or more of the walls.
  • the base section representing or comprising a part of the cabinet thus also has an external side and an internal side with respect to the apparatus.
  • all components of the apparatus - in particular the components of the heat pump system - are arranged in the internal side of the apparatus.
  • the auxiliary heat exchanger is arranged at an external side of the rear wall and may be covered by a channel wall.
  • the other components of the heat pump system are arranged completely or substantially in and/or at a basement of the apparatus, preferably in the base section portion of the apparatus. Then providing the auxiliary heat exchanger at or adjacent to (an outer surface of) a rear wall results in the o advantage that inlet and outlet tubes of the auxiliary heat exchanger may be arranged near or in the base section close to other elements of the heat pump system.
  • the other components of the heat pump system are e.g. a first and a second heat exchanger, a compressor, and preferably an expansion device.
  • the main components of the heat pump system or refrigerant loop are preferably arranged in or on a bottom shell forming part of 5 the bottom base section of the apparatus, wherein the bottom shell preferably forms the lower cover or cabinet element of the apparatus.
  • auxiliary heat exchanger By arranging the auxiliary heat exchanger in this way on or at the outer side of the rear wall of the apparatus, a compact overall layout or design of the heat pump system can be o provided. This can for example be used to provide the apparatus with smaller outer total dimension and/or to provide more internal space in the apparatus cabinet for other components, for example to enable a larger drum diameter in case of a laundry storing compartment of the apparatus being a rotatable drum. 5
  • the auxiliary heat exchanger may be connected in the refrigerant loop especially between the compressor and the second heat exchanger or between the second heat exchanger and the refrigerant expansion device.
  • the first heat exchanger may operate as evaporator or gas heater in a transcritical or totally supercritical refrigerant cycling process and/or the second heat exchanger may operate as condenser or gas cooler in a transcritical or totally o supercritical refrigerant cycling process.
  • the base section forms or comprises at the internal side thereof at least a portion of a battery channel.
  • the battery channel is a section of the process air channel which houses or at least partially houses the first and second heat exchangers.
  • the base section supports the first and second heat exchangers and/or the compressor of the heat pump system.
  • the base section comprises a bottom shell that is forming the bottom cabinet part of the laundry treatment apparatus.
  • the bottom shell may be formed by a monolithic part, preferably a single plastic mold part.
  • the base section further comprises a cover or upper shell which is covering at least some of the components of the 5 heat pump system that are arranged or mounted in the bottom shell.
  • the cover shell forms portion of the process air channel, in particular the portion of the process air channel forming the battery channel in which the first and second heat exchangers are arranged.
  • the rear wall in particular a rear wall shell forming part of the outer walls of the cabinet, comprises a recess and/or mounting structure for receiving and/or fixing the auxiliary heat exchanger.
  • the recess is arranged especially at the external side of the rear wall for receiving the auxiliary heat exchanger completely or at least partially retracted from the rear maximum extension of the apparatus at the outer face of 5 the cabinet for mechanical protection of the auxiliary heat exchanger.
  • the mounting structure which may comprise snap-fits, screwing holes and/or alignment elements, mounting the auxiliary heat exchanger is simplified.
  • the auxiliary heat exchanger is a wire-type and/or wire-tube heat exchanger o and/or the auxiliary heat exchanger is oriented at the backside of the rear wall such that a cooling air flow is induced by natural convection.
  • the natural convection is a free convection without blower assistance. Warming up the cooling air results in upwardly moving of the air because the warmed air has reduced density compared with the ambient air at same height.
  • a wire-type auxiliary heat exchanger is essentially flat and/or planar 5 and/or has restricted extension in vertical direction and/or is oriented upright.
  • the tube-type auxiliary heat exchanger has a tube for containing and passing the refrigerant, wherein the tube is guided at the backside of the rear wall in a curved manner or in serpentines or meandering from a lower region or a base unit level vertically upward.
  • the tube of the auxiliary heat exchanger preferably starts from the lower region to an
  • the resulting flow path of the refrigerant is from the upper region of the auxiliary heat exchanger to the lower region thereof for higher efficiency in heat exchange.
  • the net refrigerant flow may 5 be from left to right or right to left or from below upwards.
  • the auxiliary heat exchanger and/or the tube of the auxiliary heat exchanger and/or a tube-type auxiliary heat exchanger is extending and/or is essentially extending from the left side of the apparatus or from the left side wall to the right side of the apparatus or to the right side wall. Such arrangement consumes little space by providing 5 high cooling efficiency.
  • the top cover is protruding at the backside of the apparatus cabinet beyond the rear wall or a portion of the rear wall, wherein the auxiliary heat exchanger is arranged vertically below the protruding portion of the top cover.
  • the top cover is protruding o such as to form a top shield for the auxiliary heat exchanger.
  • the cover shell extends in backside direction beyond the rear wall and/or beyond the auxiliary heat exchanger.
  • the auxiliary heat exchanger is arranged in a usually empty room or dead volume between the dryer and a wall of a room in a building where the apparatus is placed by the user.
  • the top cover comprises one or more openings for passing through cooling air that passed over the auxiliary heat exchanger.
  • the openings may also be used for sucking in and/or blowing out cooling air driven by a and/or the blower.
  • one or more cooling air passages or openings are provided at or in the protruding portion of the top o cover.
  • the rear wall has or forms a recessed portion
  • the auxiliary heat exchanger is arranged completely or at least partially in the recessed portion
  • the top cover has an extension which covers the horizontal cross-section area of the recessed portion combining 5 several of such advantages in one embodiment.
  • the horizontal back edge or extension of the top cover protrudes beyond the backside extension of the auxiliary heat exchanger.
  • the worktop protrudes from the cabinet back wall more than the distance between the outer portion of the heat o exchanger and the outer cabinet back wall.
  • the back edge or extension of the top cover abuts against the vertical wall and the auxiliary heat exchanger does not come in contact with the vertical wall. In this way the worktop protects the auxiliary condenser from being damaged.
  • there is formed a small dimensioned space accommodating the auxiliary heat exchanger between the room 5 wall and the rear wall assisting a natural convection of the cooling air.
  • such backward protrusion or extension of top cover in horizontal direction is at least 0.3, 0.5, 0.8, 1, 1.5 or 2 cm more than maximum backward extension of auxiliary heat exchanger.
  • the auxiliary heat exchanger is arranged such as to be cooled by forcedly driven ambient air and/or the apparatus comprises a blower for blowing and/or sucking cooling air over the auxiliary heat exchanger.
  • the blower is a radial blower or tangential 5 blower.
  • the blower may be the blower that conveys cooling air through the inner volume of the cabinet (e.g. blower that cools the compressor and/or the power electronics arranged inside cabinet) and/or sucks ambient air through openings in the cabinet wall.
  • the blower is operated under the control of a control unit such that the start, the stop, the operation duration, the flow rate and/or the flow direction of the cooling air can be controlled.
  • the cooling air flow is started only when a predefined refrigerant temperature and/or pressure is detected in the refrigerant loop.
  • Actively driving the cooling air flow also provides the advantage to adapt the auxiliary heat exchanger design and the 5 path of the cooling air according to the place and technical requirements related to location where the auxiliary heat exchanger is provided.
  • the blower is arranged at the rear wall or at the external side of the rear wall and/or at an external side of a base unit.
  • the rear wall shell provides o outside supporting structure and/or portions of side walls or of the case of the blower
  • the outer maximum dimensions are not extended by providing the blower and/or auxiliary heat exchanger in or at the outside recess(es) or compartment(s). 5
  • the blower is arranged at or in close proximity to a cooling air inlet or outlet provided for the auxiliary heat exchanger.
  • the blower is directly connected to the inlet or outlet of the auxiliary heat exchanger to have a compact design and/or the blower is arranged below a fluff filter compartment provided in the process air channel.
  • an air guiding means is provided to guide the air flow over or along the auxiliary heat exchanger.
  • a or the blower is arranged at an inlet or outlet of the air guiding means.
  • the air guiding means is a channel wall extending at the backside of the rear wall and/or is extending between the base unit and the 5 top cover and/or is extending between the left side wall and the right side wall of the
  • a cooling air guiding element or means that guides the cooling air pushed or sucked by the blower towards or from the auxiliary heat exchanger.
  • the cooling air guiding element is or comprises for example one or more of: a channel, a deflector, a fin, a nozzle, a baffle or a combination thereof.
  • the air guiding means is or comprises one or more of: a portion of a or the rear wall, a rear channel wall, a bottom shell and/or a cover shell of the apparatus, in particular of the apparatus base section.
  • a double function is provided by the air guiding means.
  • a or the blower sucks in or blows out the cooling air through at least one opening at the bottom side of the cabinet and/or at the back side of the cabinet and/or at least one opening to the inner side of the cabinet.
  • the apparatus comprises flow path means for guiding the cooling air from the auxiliary heat exchanger to one or more of the following or from one or more of the following to the auxiliary heat exchanger: the compressor, a drum drive motor of the apparatus and power electronics of the apparatus.
  • the cooling air conveyed by the o blower is additionally passed over or through other components of the apparatus by
  • cooling air guiding means like a cooling air channel or partition and/or deflection walls or elements.
  • other heating components can be cooled down before or after guiding the cooling air to the auxiliary heat exchanger.
  • a or the blower sucks in or blows out the cooling air through at least one opening or recess in the front wall of the apparatus or through at least one opening or recess in a front bottom panel of the cabinet.
  • the air is guided from or to front side for air intake or exhaust.
  • the inlet opening(s) are directed to the apparatus front and/or are arranged at the apparatus front to enable sucking in of ambient air.
  • the outlet opening(s) of the auxiliary heat exchanger and/or blower are
  • the base section of the apparatus forms, at the
  • the internal side of the base section supports the first heat exchanger and the second heat exchanger. It is a preferred embodiment that the internal side of the base section forms a seat for the compressor.
  • a preferred embodiment is an apparatus, wherein the base section comprises a bottom shell and a cover shell forming together the battery channel, wherein the auxiliary heat exchanger is arranged at the bottom shell, especially arranged at the back section of the bottom shell making possible high extension of the auxiliary heat exchanger.
  • the apparatus cabinet has ventilation openings at a o bottom shell, at the cabinet side wall or at the cabinet rear wall.
  • the heat exchanging surface(s) of the auxiliary heat exchanger is(are) increased by using one or more thermally conductive elements like: a corrugated metal plate, a heat radiator element, a heat
  • the process air loop is preferably a closed loop in which the process air is continuously o circulated through the laundry storing chamber.
  • a closed loop in which the process air is continuously o circulated through the laundry storing chamber.
  • the process air loop is temporally opened (preferably only a short section of the total processing time) to have an open loop discharge - which e.g. may be 5 used to remove smell from the laundry treated.
  • the auxiliary heat exchanger may have a 'flat' design and the cooling air is flown in and exhausted out at a 'flat' side or edge, respectively.
  • Flat means for example that the area of the cooling air inlet and outlet (in particular the cross section area of the auxiliary heat o exchanger in a sectional plane perpendicular to the cooling air flow path through the
  • auxiliary heat exchanger is smaller than the cross section area of the auxiliary heat exchanger along a main axis (i.e. the largest cross section area of a sectional plane parallel to the cooling air flow path).
  • the cross sections of air channels (as far as applicable) for guiding cooling air from and to the auxiliary heat exchanger and a blower 5 for blowing the cooling air is smaller as compared to conventional auxiliary heat
  • the cooling capacity of the auxiliary heat exchanger is not provided by a large cross section for passing the cooling air, but by an extended cooling air path length through the auxiliary heat exchanger.
  • the cooling air path length through the auxiliary heat exchanger is longer than at least the shortest inlet or outlet cross section dimension.
  • the auxiliary heat exchanger can be sandwiched between other components or elements of the apparatus or at the gap between the outer surface of a rear shell and the vertical wall before which the apparatus is placed or between a process air channel wall and the inside wall section of the apparatus cabinet (e.g. rear or side shell thereof).
  • the auxiliary heat exchanger is arranged before a section of the process air channel at the rear shell of the apparatus.
  • Fig. 1 a schematic view of a dryer with a heat pump system
  • Fig. 2 a perspective side view to an auxiliary heat exchanger as integrated in or at a base unit
  • Fig. 3 a perspective side view of a preferred embodiment of a dryer having
  • Fig. 4 the dryer of Fig. 2 with attached side cabinet wall during a mounting step for the rear channel wall
  • Fig. 5 the dryer of Fig. 2 with attached rear channel wall.
  • auxiliary heat exchanger 13 which is provided at a backside and/or external of a cabinet 40 of a laundry treatment apparatus 2, 2a.
  • Ambient air is used to take heat from the auxiliary heat exchanger 13 by flowing or passing the ambient air in the form of a cooling air flow C, C and/or Cn along or over the auxiliary heat exchanger.
  • Cooling air flow C is conveyed by a blower 28 which is dedicated (exclusively) for cooling the auxiliary heat exchanger; cooling air flow C is conveyed by a blower 28a which is normally arranged within the cabinet 40 of the apparatus 2, 2a and cools components of the apparatus arranged within the apparatus or exchanges internally heated air by cooler ambient air; cooling air flow Cn is a flow generated by natural convection without a mechanical conveying force and which results from heating the air surrounding the auxiliary heat exchanger. All cooling air flows can contribute to auxiliary heat exchanger cooler at different phases of operating the heat pump system of the apparatus. For example Cn may assist C and/or C at any time of a laundry treatment process (e.g. laundry drying process). C may be started by activating the internal blower 28a some time after starting the dryer when the compressor or any other internal component has warmed up. Additionally or alternatively C may be started by activating blower 28 when the heat pump system approaches the normal operation state or mode.
  • a laundry treatment process e.g. laundry drying process
  • Fig. 1 depicts in a schematic representation a laundry treatment apparatus as a home appliance 2 which in this embodiment is a heat pump tumble dryer.
  • the tumble dryer comprises a heat pump system 4, including in a closed refrigerant loop in this order of refrigerant flow B: a first heat exchanger 10 acting as evaporator for evaporating the refrigerant and cooling process air, a compressor 14, a second heat exchanger 12 acting as condenser for cooling the refrigerant and heating the process air, an auxiliary heat exchanger 13 acting as auxiliary condenser and transferring heat to cooling air (C, C and/or Cn), and an expansion device 16 from where the refrigerant is returned to the first heat exchanger 10.
  • a heat pump system 4 including in a closed refrigerant loop in this order of refrigerant flow B: a first heat exchanger 10 acting as evaporator for evaporating the refrigerant and cooling process air, a compressor 14, a second heat exchanger 12 acting as condenser for cooling
  • the heat pump system forms a refrigerant loop 6 through which the refrigerant is circulated by the compressor 14 as indicated by arrow B.
  • the first heat exchanger 10 can act as gas heater and the second and auxiliary heat exchanger 12, 13 can act as gas cooler.
  • the main components of the heat pump system 4 are arranged in a base section 5 or basement of the dryer 2, an embodiment of which is shown in the following figures.
  • the expansion device 16 is a controllable valve that operates under the control of a control unit to adapt the flow resistance for the refrigerant in dependency of operating states of the heat pump system 4.
  • the expansion device 16 can be a capillary tube, a valve with fixed expansion cross-section, a throttle valve with variable cross section that automatically adapts the expansion cross-section in dependency of the refrigerant pressure (e.g. by elastic or spring biasing), a semi-automatic throttle valve in which the expansion cross-section is adapted in dependency of the temperature of the refrigerant (e.g. by actuation of a thermostat and/or where the temperature of the refrigerant is taken at a predefined one of the components, in thermal contact with the refrigerant.
  • the process air flow within the home appliance 2 is guided through a compartment 18 of the home appliance 2, i.e. through a compartment being a laundry storing chamber 18 for receiving articles to be treated, e.g. a drum 18.
  • the articles to be treated are textiles, laundry 19, clothes, shoes or the like. In the embodiments here these are preferably textiles, laundry or clothes.
  • the process air flow is indicated by arrows A in the Figures and is driven by a process air blower 8.
  • the process air channel 20 guides the process air flow A outside the drum 18 and includes different sections, including the section forming the battery channel 20a in which the first and second heat exchangers 10, 12 are arranged.
  • the process air exiting the second heat exchanger 12 flows into a rear channel 20b in which the process air blower 8 is arranged.
  • the air conveyed by blower 8 is guided upward in a rising channel 20c to the backside of the drum 18 and into the drum 18.
  • the air exiting the drum 18 through the drum outlet, which is especially the loading opening 46 of the drum 18, is filtered by a fluff filter 22 which is here arranged close to the drum outlet in or at a front channel 20d.
  • the fluff filter 22 is arranged in the front channel 20d forming another section of channel 20 which is arranged behind and adjacent the front cover of the dryer 2.
  • the auxiliary heat exchanger 13 acts as an additional condenser (or gas cooler in case of transcritical or totally supercritical operation of the refrigerant cycle) and is connected in the refrigerant loop as indicated by refrigerant piping 6 in Fig. 1.
  • the sequence of the components in the refrigerant loop 6 can be modified in that the auxiliary heat exchanger 13 is not placed between the second heat exchanger 12 and the expansion device 16 with respect to refrigerant flow, but between the compressor 14 and the second heat exchanger 12. This modification is applicable to all embodiments herein.
  • the auxiliary heat exchanger 13 transfers heat from the process air to ambient air, which is also denoted as cooling air (C, C and/or Cn) in the following.
  • cooling air C, C and/or Cn
  • an internal blower 28a is mounted in the dryer 2, preferably in the dryer cabinet 40, such that it sucks the air from at least one inlet opening from outside of the dryer, flows the air over one or more internal components to be cooled and/or blows the cooling air C over one or more internal components to be cooled to at least one outlet opening and from there over the auxiliary heat exchanger 13.
  • the blower o 28a sucks in cooling air from the front side through one or more inlets to convey the
  • Cooling air C can be advantageously guided to and from the blower 28a5 by air guide channels or air guide components formed and arranged within the cabinet 40.
  • Outlet openings and the exhausting direction of these outlets for exhausting the cooling air C conveyed by the internal blower 28a may be designed such that a cooling air flow C is induced (even without providing below blower 28) or the convection flow Cn is amplified.
  • the exhausted air flow C o may result in a Venturi-effect inducing the forced air flow C.
  • Fig. 3 shows an embodiment with the auxiliary heat exchanger 14 arranged at the rear side of the rear wall 43 without providing a blower 28 dedicated for the auxiliary heat exchanger.
  • the heat transferred from the hot refrigerant in the auxiliary heat 5 exchanger 14 to the ambient air induces the convective air flow Cn which accelerates heat exchange.
  • the channel wall 45 may be provided which additionally accelerates heat exchange due to the chimney effect of the rising cooling air Cn.
  • FIG. 4 and 5 shows another embodiment with the auxiliary heat exchanger 14 arranged at the rear side of the rear wall 43 without providing a blower 28 dedicated for the auxiliary heat exchanger.
  • a blower 28 dedicated for the auxiliary heat exchanger 13 is provided that conveys a flow of cooling air C.
  • the flow direction may be forward or backward, i.e. sucking from or blowing to the auxiliary heat 5 exchanger.
  • the blower 28 is operating as soon as the normal operation mode is achieved or is approached.
  • the blower 28 operates continuously when normal operation mode once has been achieved or is approached during the running drying cycle.
  • the blower 28 is operated according to cooling needs interruptedly and/or with varying conveyance speed.
  • the complete air is exhausted at the rear upper side and/or at the upper rear side of the dryer 2.
  • Other embodiments can provide one or more outlet openings to exhaust the warmed up cooling 5 air C, Cn at other positions of a dryer, too.
  • the first heat exchanger 10 transfers heat o from the process air A to the refrigerant.
  • the process air By cooling the process air to lower temperatures, humidity from the process air condenses at the first heat exchanger 10, is collected there and the collected condensate is drained to a condensate collector 30.
  • the process air cooled and dehumidified when passing the first heat exchanger passes then through the second heat exchanger 12 where heat is transferred from the refrigerant to the process air.
  • The5 process air is sucked from exchanger 12 by the blower 8 and is driven into the drum 18 where it heats up the laundry 19 and receives the humidity therefrom.
  • the process air exits the drum 18 and is guided in front channel 20d back to the first heat exchanger 10.
  • the auxiliary heat exchanger 13 is arranged in a rear section 7 of the dryer 2. In particular, 0 the auxiliary heat exchanger 13 extends in an upward direction such that cooling air C making possible an air flow by natural convection Cn along the surface of the auxiliary heat exchanger 13 and/or through the auxiliary heat exchanger 13. The air flow by natural convection Cn is induced by heating up the cooling air C so that the warmed up air rises upside against the gravity.
  • the auxiliary heat exchanger 13 extends upwardly starting at the bottom of the dryer 2 or in the base section 5. According to other embodiments the auxiliary heat exchanger 13 can extend upwardly starting from a position higher than the base section 5.
  • the auxiliary heat exchanger 13 or a heat o exchanging part thereof is arranged in a height within or approximately in the height range of the drum 18.
  • the auxiliary heat exchanger 13 or a heat exchanging part thereof is arranged in a height of the middle height of the drum 18.
  • the auxiliary heat exchanger 13 extends or is arranged higher than the rotation axis x of the drum 18.
  • Fig. 2 shows a perspective side view and an enlarged section view of one embodiment of the auxiliary heat exchanger 13.
  • the auxiliary heat exchanger 13 comprises an inlet tube 60 and an outlet tube 61.
  • the inlet tube 60 and the outlet tube 61 are parts of the refrigerant loop 6 or connected to tubes of the refrigerant loop 6.
  • the inlet tube 60 is 5 connected to an outlet of the second heat exchanger 12 and the outlet tube 61 is connected to an inlet of the expansion device 16.
  • the inlet tube 60 and the outlet tube 61 are connected to one end of a heat exchanging tube or are the end sections of a heat exchanging tube extending in especially serpentines through the auxiliary heat exchanger 13.
  • the shown heat exchanging tube is formed by elongated extending tubes which are o connected by curved tubes to form together the meandering tubes 62.
  • Wires 64 or cooling ribs are in heat transfer connection with the tubes 62 and enlarge the heat exchanging surface of the auxiliary heat exchanger 13 around which the cooling air C, C and/or Cn flows.
  • Heat exchanger 18 extends with side dimension 'a' and in a height 5 dimension 'b' parallel to the or a portion of the rear wall 43 of the dryer.
  • the auxiliary heat exchanger can be embodied in any other form or type of heat exchanger suitable to transfer especially residual heat from the refrigerant to the cooling air.
  • the piping of the auxiliary heat exchanger 13 can be provided with heat exchanger surfaces for enlarging the heat exchanging surface area, for example o rips, heat radiators a grid structure or the like.
  • Figs. 3 to 5 show a perspective side view of a preferred embodiment dryer 2a to show some more exemplary details.
  • the main components of the heat pump system 4 (except the control electronics which is arranged at a top section of dryer) are arranged in or at a 5 bottom shell 48 (partially shown) which also forms part of the process air channel 20, including the battery channel (in which the first and second heat exchanger 10, 12 are encased), the rear channel 20b, portion of the rising channel (not shown) and portion of the front channel.
  • the cabinet is formed by two side covers (only one cabinet side wall 42 shown in Fig. 4), a front cabinet wall 44 (partially shown) and a cabinet top cover 49. In 0 Figs. 3 to 5 the loading opening in the front cabinet wall 44 for loading laundry into and out of drum 18 is not shown.
  • the auxiliary heat exchanger 13 preferably extends in a sideward dimension 'a' little bit less than the horizontal extension of the rear wall 43 between the side walls 42 and 5 preferably extends in height dimension 'b' less than a height 'h' of the rear wall 43.
  • the rear wall 43 of the cabinet 40 extends between the two side cabinet walls 42 and the height h of the dryer 2a and in parallel to the front cabinet wall 44 as shown in Figs. 4 and 5.
  • the rear wall 43 has a recess 50 to accommodate the auxiliary heat exchanger 13 and a cooling air passage for the upwardly flowing cooling air C, C and/or Cn.
  • the dryer comprises a 5 rear channel wall 45 extending at the backside of the dryer 2, 2a and essentially parallel or parallel to the auxiliary heat exchanger 13.
  • the channel wall 45 protects the auxiliary heat exchanger 13 and serves as guide for the cooling air C by forming portion of an air passage between the channel wall 45 and the rear wall 43 accommodating the auxiliary heat exchanger 13.
  • the rear wall 43 and/or the channel wall 45 can form a recess and/or o mounting structure for receiving the auxiliary heat exchanger 13.
  • a lower section of the channel wall 45 comprises one or more cooling air inlet openings 55 letting in ambient air.
  • an upper section of the channel wall 45 comprises one or more cooling air outlet openings 56 letting cooling air 5 out to the ambient of the dryer 2a.
  • cooling air outlet opening 56 in the preferred embodiment there are provided one or more cooling air outlet openings 54 in the top cover 49 for passing the cooling air C, Cn out to and/or in from the dryer ambient.
  • cooling air inlet opening 55 in the preferred embodiment there are provided one or more cooling air inlet openings 53 at the lower front section of the dryer 2a letting cooling air C from the ambient into the dryer 2a and pass along and/or through the other components of the heat pump system 4 arranged in the base section (for example passing first the compressor 14 and then the auxiliary heat exchanger 13).
  • the auxiliary heat exchanger 13 has cooling air inlets towards the bottom side of the dryer 2a and cooling air outlet towards the upper side of the dryer 2a.
  • the cooling air exhausted from auxiliary heat exchanger 13 distributes in the gap between the rear upper side of shell 48 and the rear wall 43 and flows from there mainly to the o upper rear side and upper side out of the dryer.
  • the auxiliary heat exchanger 13 is housed between a portion of the rear wall 43, the rear channel wall 45, and a top cover 49 forming the top wall of cabinet 40. These define the outlines of the inlet and the outlet each with a corresponding cross section area.
  • the flow direction of the cooling air C can be controlled by the (fixed or 5 invertable) conveying direction of blower 28.
  • the blower 28 may be arranged at the lower rear side of the cabinet 40 and below the auxiliary heat exchanger 13. Alternatively, the blower 28 can be arranged at other positions, especially other positions at the base section, too.
  • the flow path length b (or height) of the auxiliary heat exchanger 13 is larger than the exchanger width dimension 'a' cross to the flow path C.
  • the ratio between flow path length b to the width dimension a is or is at least e.g. 1.5, 2, 3, 4, 5, 6, 8 or 10.
  • the area of sides spanning the plane of the auxiliary heat exchanger 13 is larger than the area of the inlets 53, 55 or outlets 54, 56 preferably the ratio of the plane area to inlet and/or outlet areas is or is at least 1.5, 2, 3, 4, 5, 6, 8 or 10.
  • a 'flat' auxiliary heat exchanger 13 is provided that can be interlaced or inserted in gaps between elements, at wall niches of the rear wall 43 or the like.
  • the auxiliary heat exchanger 13 can be oriented to have its inlet section and outlet section in a horizontal plane. Or the inlet and outlet may be inclined with respect to the horizontal and/or a vertical plane.

Abstract

L'invention concerne un appareil de traitement de linge ayant un système de pompe à chaleur, comprenant : une caisse 40 ayant une paroi avant 44, une paroi arrière 43, des parois latérales 42 et un couvercle supérieur 49, une chambre de stockage de linge 18 disposée à l'intérieur de la caisse pour traiter le linge 19 à l'aide d'air de traitement A, une boucle d'air de traitement pour faire circuler l'air de traitement à travers la chambre de stockage de linge, et un système de pompe à chaleur 4 pour déshumidifier et chauffer l'air de traitement, le système de pompe à chaleur ayant une boucle de réfrigérant 6. La boucle de réfrigérant comprend un premier échangeur de chaleur 10 pour chauffer un réfrigérant et refroidir l'air de traitement, un second échangeur de chaleur 12 pour refroidir le réfrigérant et chauffer l'air de traitement, un dispositif de dilatation de réfrigérant 16, un compresseur 14 et un échangeur de chaleur auxiliaire 13; l'échangeur de chaleur auxiliaire étant disposé au niveau du côté externe de la paroi arrière 43.
PCT/EP2014/054861 2013-03-22 2014-03-12 Appareil de traitement de linge ayant une pompe à chaleur WO2014146953A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2014234494A AU2014234494A1 (en) 2013-03-22 2014-03-12 Laundry treatment apparatus with heat pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13160567.7A EP2781644A1 (fr) 2013-03-22 2013-03-22 Appareil de traitement du linge avec pompe thermique
EP13160567.7 2013-03-22

Publications (1)

Publication Number Publication Date
WO2014146953A1 true WO2014146953A1 (fr) 2014-09-25

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Country Link
EP (1) EP2781644A1 (fr)
AU (1) AU2014234494A1 (fr)
WO (1) WO2014146953A1 (fr)

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CN115352766A (zh) * 2022-08-29 2022-11-18 湖南尚珂伊针纺有限公司 针纺织品用的防潮储存装置

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CN106400423B (zh) * 2015-07-31 2019-10-22 浙江三花智能控制股份有限公司 烘干系统及干燥装置
CN107034645B (zh) * 2015-07-31 2019-09-27 浙江三花智能控制股份有限公司 烘干系统及干燥装置
EP3235942A1 (fr) * 2016-04-21 2017-10-25 Electrolux Appliances Aktiebolag Sèche-linge avec pompe à chaleur
CN105970544B (zh) * 2016-05-31 2019-01-18 无锡小天鹅股份有限公司 衣物处理装置的热泵模组及衣物处理装置
CN111979711B (zh) * 2020-07-15 2021-10-01 格力电器（杭州）有限公司 一种除菌洗衣机

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FR1439185A (fr) * 1965-04-07 1966-05-20 Armoire sèche-linge à circuit fermé
FR1557616A (fr) * 1966-05-18 1969-02-21
EP0163265A2 (fr) * 1984-05-26 1985-12-04 Miele & Cie. GmbH & Co. Séchoir à tambour pour linge
JPH01212599A (ja) * 1988-02-22 1989-08-25 Mitsubishi Heavy Ind Ltd 洗濯・乾燥機
DE19638865A1 (de) * 1995-09-23 1997-03-27 Miele & Cie Kondensationswäschetrockner mit einer Wärmepumpeneinrichtung
EP1811077A1 (fr) * 2006-01-20 2007-07-25 SANYO ELECTRIC Co., Ltd. Machine à sécher
DE202008002641U1 (de) * 2008-02-25 2008-05-08 BSH Bosch und Siemens Hausgeräte GmbH Arbeitsplatte für ein Haushaltsgerät
EP2460926A1 (fr) * 2010-12-02 2012-06-06 Electrolux Home Products Corporation N.V. Séchoir à pompe thermique

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EP1884586A3 (fr) 2006-11-06 2008-02-27 V-Zug AG Sèche-linge avec échangeur de chaleur supplémentaire
DE202006018205U1 (de) 2006-11-06 2007-02-15 V-Zug Ag Wäschetrockner mit Zusatzwärmetauscher
DE102007002181B3 (de) 2007-01-15 2008-08-21 BSH Bosch und Siemens Hausgeräte GmbH Kondensationstrockner mit einer Wärmepumpe

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1439185A (fr) * 1965-04-07 1966-05-20 Armoire sèche-linge à circuit fermé
FR1557616A (fr) * 1966-05-18 1969-02-21
EP0163265A2 (fr) * 1984-05-26 1985-12-04 Miele & Cie. GmbH & Co. Séchoir à tambour pour linge
JPH01212599A (ja) * 1988-02-22 1989-08-25 Mitsubishi Heavy Ind Ltd 洗濯・乾燥機
DE19638865A1 (de) * 1995-09-23 1997-03-27 Miele & Cie Kondensationswäschetrockner mit einer Wärmepumpeneinrichtung
EP1811077A1 (fr) * 2006-01-20 2007-07-25 SANYO ELECTRIC Co., Ltd. Machine à sécher
DE202008002641U1 (de) * 2008-02-25 2008-05-08 BSH Bosch und Siemens Hausgeräte GmbH Arbeitsplatte für ein Haushaltsgerät
EP2460926A1 (fr) * 2010-12-02 2012-06-06 Electrolux Home Products Corporation N.V. Séchoir à pompe thermique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115352766A (zh) * 2022-08-29 2022-11-18 湖南尚珂伊针纺有限公司 针纺织品用的防潮储存装置

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