EP2189568B1 - Waschmaschine und Trockner - Google Patents

Waschmaschine und Trockner Download PDF

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Publication number
EP2189568B1
EP2189568B1 EP20080169589 EP08169589A EP2189568B1 EP 2189568 B1 EP2189568 B1 EP 2189568B1 EP 20080169589 EP20080169589 EP 20080169589 EP 08169589 A EP08169589 A EP 08169589A EP 2189568 B1 EP2189568 B1 EP 2189568B1
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EP
European Patent Office
Prior art keywords
refrigerant
heat exchanger
water
air
laundry
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.)
Not-in-force
Application number
EP20080169589
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English (en)
French (fr)
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EP2189568A1 (de
Inventor
Gordon Elger
Alberto Bison
Massimiliano Vignocchi
Jean-Yves Noel
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Electrolux Home Products Corp NV
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Electrolux Home Products Corp NV
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 Home Products Corp NV filed Critical Electrolux Home Products Corp NV
Priority to AT08169589T priority Critical patent/ATE540154T1/de
Priority to EP20080169589 priority patent/EP2189568B1/de
Priority to BRPI0920911A priority patent/BRPI0920911A2/pt
Priority to PCT/EP2009/006394 priority patent/WO2010057547A1/en
Priority to CN2009801532154A priority patent/CN102272373B/zh
Priority to US13/130,334 priority patent/US20120272689A1/en
Publication of EP2189568A1 publication Critical patent/EP2189568A1/de
Application granted granted Critical
Publication of EP2189568B1 publication Critical patent/EP2189568B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—Heat pump arrangements

Definitions

  • the present invention relates to a laundry washing and drying machine.
  • the present invention relates to a front-loading home laundry washing and drying machine, to which the following description refers purely by way of example.
  • front-loading laundry washing and drying machines generally comprise a substantially parallelepiped-shaped outer box casing resting on the floor; a substantially bell-shaped washing tub which is suspended in floating manner inside the casing by means of a number of coil springs and shock-absorber, directly facing a laundry loading and unloading opening formed in the front face of the casing; a door hinged to the front face of the casing to rotate to and from a closing position in which the door closes the opening in the front face of the casing to seal the washing tub; a substantially bell-shaped cylindrical revolving drum for housing the laundry to be washed and dried, and which is housed substantially horizontally inside the washing tub to rotate about its longitudinal axis; and an electric motor for rotating the revolving drum about its longitudinal axis inside the washing tub.
  • Front-loading laundry washing and drying machines of the above type also have a water supply and recirculating circuit for supplying a given amount of tap water into the washing tub, and for circulating said water into the washing tub during washing and rinsing phases of the washing cycle; and a closed-circuit, hot-air generator designed to circulate inside the washing tub a stream of hot air with a low moisture content, and which flows through the revolving drum and over the laundry inside the drum to rapidly dry the laundry.
  • the closed-circuit, hot-air generator comprises an air recirculating conduit having its two ends connected to the washing tub, on opposite sides of the latter; an electric centrifugal fan located along the recirculating conduit to produce, inside the latter, an airflow which flows through the washing tub and the revolving drum; and finally a heat-pump assembly having its two heat exchangers located one after the other, along the air recirculating conduit.
  • the first air/refrigerant heat exchanger of the heat-pump assembly provides for rapidly cooling the airflow arriving from the washing tub to condense the surplus moisture in the airflow; whereas the second air/refrigerant heat exchanger of the heat-pump assembly provides for rapidly heating the airflow arriving from the first heat exchanger and directed back to the washing tub, so that the airflow re-entering into the washing tub is heated rapidly to a temperature higher than or equal to that of the air flowing out of the washing tub.
  • the heat-pump assembly of the hot-air generator comprises:
  • first and second air/refrigerant heat exchangers of the heat-pump assembly are located along the air recirculating conduit, so as that the second air/refrigerant heat exchanger provides for rapidly cooling the airflow arriving from the washing tub to condense the surplus moisture in the airflow, and the first air/refrigerant heat exchanger provides for rapidly heating the airflow arriving from the second air/refrigerant heat exchanger and directed back to the washing tub, so that the airflow entering into the tub is heated rapidly to a temperature higher than or equal to that of the same air flowing out of the tub.
  • the first air/refrigerant heat exchanger of the heat-pump assembly i.e. the heat exchanger which heats up the airflow directed back to the washing tub
  • the first air/refrigerant heat exchanger of the heat-pump assembly is also used for heating up the tap water necessary for performing the washing and rinsing phases of the washing cycle.
  • This heat exchanger in fact, is structured for performing an optimal heat exchange between two fluids in gaseous state (i.e. the dehumidified air directed back to the washing tub and the refrigerant in the gaseous state), and therefore it is unable to allow an optimal heat exchange between a fluid in liquid state and a fluid in gaseous state.
  • the first heat exchanger of the heat-pump-type, hot-air generator is unable to speedy heat up the washing water stored in the washing tub.
  • a laundry washing and drying machine as claimed in Claim 1 and preferably, though not necessarily, in any one of the Claims depending directly or indirectly on Claim 1.
  • number 1 indicates as a whole a laundry washing and drying machine comprising a preferably, though not necessarily, parallelepiped-shaped outer box casing 2 resting on the floor; a substantially bell-shaped washing tub 3 suspended in floating manner inside casing 2 via a suspension system comprising a number of coil springs 4 (only one shown in Figure 1 ) preferably, though not necessarily, combined with one or more vibration dampers 5 (only one shown in Figure 1 ); a substantially bell-shaped cylindrical revolving drum 6 for housing the laundry to be washed and/or dried, and which is fixed in axially rotating manner inside washing tub 3 for rotating about its longitudinal axis L; and an electric motor assembly 7 for rotating, on command, revolving drum 6 about its longitudinal axis L inside washing tub 3.
  • laundry washing and drying machine 1 is a front-loading home washing and drying machine, therefore washing tub 3 is suspended substantially horizontally inside casing 2, with the front opening of washing tub 3 directly faced to a laundry loading and unloading opening formed in a front face 2a of casing 2.
  • Revolving drum 6, in turn, is housed into washing tub 3 so that its longitudinal axis L is oriented substantially horizontally, and coincides with the longitudinal axis of washing tub 3.
  • laundry washing and drying machine 1 is also provided with a cylindrical elastic-deformable bellows 8 connecting the front opening of washing tub 3 to the laundry loading and unloading opening formed in front face 2a of casing 2, and with a door (not shown) hinged to front face 2a of casing 2 to rotate to and from a closing position in which the door closes the laundry loading and unloading opening in front face 2a to seal washing tub 3.
  • laundry washing and drying machine 1 is also provided with a water supply and recirculating system 9 for supplying a given amount of tap water into washing tub 3, and for circulating said water into washing tub 3 during washing and rinsing phases of the washing cycle; and with a closed-circuit, hot-air generator 10 designed to circulate inside washing tub 3 a stream of hot air with a low moisture content, and which flows through revolving drum 6 and over the laundry inside the drum to rapidly dry the laundry.
  • a water supply and recirculating system 9 for supplying a given amount of tap water into washing tub 3, and for circulating said water into washing tub 3 during washing and rinsing phases of the washing cycle
  • a closed-circuit, hot-air generator 10 designed to circulate inside washing tub 3 a stream of hot air with a low moisture content, and which flows through revolving drum 6 and over the laundry inside the drum to rapidly dry the laundry.
  • closed-circuit, hot-air generator 10 provides for gradually drawing air from washing tub 3; extracting surplus moisture from the air drawn from washing tub 3; heating the dehumidified air to a predetermined temperature, normally higher than the temperature of the air from washing tub 3; and feeding the heated, dehumidified air back into washing tub 3, where it flows over, to rapidly dry, the laundry inside the revolving drum 6.
  • laundry washing and drying machine 1 is preferably, though not necessarily, provided with a detergent drawer (not shown) which is removably housed inside a seat on front face 2a of casing 2, and which has at least one compartment for a given amount of detergent and/or softener for use in the washing cycle.
  • a detergent drawer (not shown) which is removably housed inside a seat on front face 2a of casing 2, and which has at least one compartment for a given amount of detergent and/or softener for use in the washing cycle.
  • the seat communicates directly with washing tub 3, and the water supply and recirculating system 9 consists of a drawer flush circuit 11 which, on command, feeds a given amount of tap water into the compartments of the detergent drawer to flush the detergent and/or softener out of the compartments and down into washing tub 3; and of a washing water recirculating and draining circuit 12 which, on command, sucks the washing water from the bottom of washing tub 3 and feeds said water back into the revolving drum 6, or alternatively drains the water accumulated into the washing tub 3 into a waste-water exhaust duct (not shown) located out of the laundry washing and drying machine 1.
  • a drawer flush circuit 11 which, on command, feeds a given amount of tap water into the compartments of the detergent drawer to flush the detergent and/or softener out of the compartments and down into washing tub 3
  • a washing water recirculating and draining circuit 12 which, on command, sucks the washing water from the bottom of washing tub 3 and feeds said water back into the revolving drum 6,
  • the drawer flush circuit 11 comprises at least one water supply pipe 13, which is connected to the external water supply main M of the building in which the washing machine is installed, and terminates directly over the detergent drawer; and at least one electrically controlled on-off valve 14 interposed between water supply pipe 13 and the water supply main M to regulate the pressurized-water flow to the end of water supply pipe 13, so as to sprinkle, on command, the compartment/s of the detergent drawer.
  • electrically controlled on-off valve 14 is a conventional controlled-open-close solenoid valve 14.
  • the washing water recirculating and draining circuit 12 comprises a water recirculating pipe 15 having a first end in communication with the bottom of washing tub 3, and a second end faced to, or connected in known manner to, the revolving drum 6; an electrically operated water circulating pump 16 located along water recirculating pipe 15 for sucking the washing water from the bottom of washing tub 3 and pumping said water towards revolving drum 6; water filtering means (not shown) located along water recirculating pipe 15, preferably, though not necessarily, upstream of pump 16; and an electrically controlled tree-way valve 17 which is located along water recirculating pipe 15, immediately downstream of pump 16, for channeling, on command, the water flowing along recirculating pipe 15 into a water draining pipe 18 which is in communication with the waste-water exhaust duct (not shown) located out of the laundry washing and drying machine 1.
  • hot-air generator 10 is a heat-pump-type, hot-air generator and substantially comprises:
  • Heat-pump assembly 21 operates in the same way as a traditional heat-pump - which is capable of transferring heat from one fluid to another using an intermediate gaseous refrigerant subjected to a closed thermodynamic cycle, the thermodynamic principles of which are widely known and therefore not described in detail - but, differently from known laundry washing and drying machines, heat-pump assembly 21 is a bi-directional device and it comprises:
  • refrigerant heat exchanger 23 is located along air recirculating conduit 19, upstream of washing tub 3 - and preferably, thought not necessarily, downstream of centrifugal fan 20 -, and is designed so that the refrigerant arriving from the bi-directional closed-circuit refrigerant circulating means and the airflow f directed to washing tub 3 flow through it simultaneously, allowing the refrigerant to release or absorb heat to/from said airflow f, thus rapidly heating or cooling the airflow f.
  • refrigerant heat exchanger 24 is located out of air recirculating conduit 19, and is designed so that the washing water arriving from revolving drum 3 and the refrigerant arriving from the bi-directional closed-circuit refrigerant circulating means flow through it simultaneously, allowing the refrigerant to release or absorb heat to/from said washing water, thus rapidly heating or cooling the washing water arriving from revolving drum 3; and hot-air generator 10 is also provided with:
  • heat-pump assembly 21 comprises:
  • Heat-pump assembly 21 also comprises a number of suitable connecting pipes which connect refrigerant compressing device 22, air/refrigerant heat exchanger 23, water/refrigerant heat exchanger 24 and refrigerant expansion device 27 one to the other, so as to form a closed circuit allowing the refrigerant coming out from the outlet of compressing device 22 to flow through, in sequence, air/refrigerant heat exchanger 23, refrigerant expansion device 27 and water/refrigerant heat exchanger 24, before returning to the inlet of compressing device 22; and an electrically controlled four-way hydraulic distributor 28 which connects compressing device 22 to both the air/refrigerant heat exchanger 23 and the water/refrigerant heat exchanger 24.
  • the four-way hydraulic distributor 28 is structured for selectively putting the outlet of compressing device 22 in direct communication with the air/refrigerant heat exchanger 23 or, alternatively, the water/refrigerant heat exchanger 24, and the inlet of compressing device 22 in direct communication with the other refrigerant heat exchanger 23 or 24, so as to select, on command, the flowing direction of the refrigerant through the air/refrigerant heat exchanger 23, the water/ refrigerant heat exchanger 24 and the refrigerant expansion device 27.
  • hydraulic distributor 28 is able to reverse, on command, the normal flowing direction of the refrigerant along, in sequence, the air/refrigerant heat exchanger 23, the refrigerant expansion device 27 and the water/refrigerant heat exchanger 24.
  • the refrigerant releases heat to the water arriving from washing tub 3 when flowing through water/refrigerant heat exchanger 24, and absorbs heat from the air circulating into the air recirculating conduit 19 when flowing through air/refrigerant heat exchanger 23.
  • the water/refrigerant heat exchanger 24 and the electrically controlled four-way hydraulic distributor 28 are commonly know parts in the heat-pump technical field, and therefore not described in detail.
  • air/water heat exchanger 25 is a commonly know part in the washing machine technical field, and therefore not described in detail.
  • the water circulation circuit 26 comprises a first pipe 29 connecting the bottom of washing tub 3 to the inlet of water/refrigerant heat exchanger 24; a second pipe 30 connecting the outlet of water/refrigerant heat exchanger 24 to the inlet of the air/water heat exchanger 25; a third pipe 31 connecting the outlet of air/water heat exchanger 25 to the bottom of washing tub 3; and an electrically powered water circulating pump 32 which is located along pipe 29 (or alternatively along pipe 30 or pipe 31) for sucking, on command, the washing water from the bottom of washing tub 3 and circulating said water through, in sequence, the water/refrigerant heat exchanger 24 and the air/water heat exchanger 25, or vice versa, before feeding said water back into washing tub 3.
  • the electrically operated centrifugal fan 20 is preferably, though not necessarily, located between air/refrigerant heat exchanger 23 and air/water heat exchanger 25; and hot-air generator 10 also comprises electrically controlled air valves, air baffles or similar airflow control means, which are able to put, on command, the air recirculating conduit 19 in direct communication with the outside, for allowing external air to circulate through air/refrigerant heat exchanger 23.
  • said airflow control means are preferably, though not necessarily, also able to prevent, at the same time, the external air from circulating through the air/water heat exchanger 25.
  • hot-air generator 10 is provided with two three-way valves 33 and 34, which are located along air recirculating conduit 19, on both sides of air/refrigerant heat exchanger 23, so to divide air recirculating conduit 19 into two consecutive segments, each of which crosses a respective heat exchanger 23, 25.
  • Both three-way valves 33 and 34 are designed to put the first segment of air recirculating conduit 19 that crosses air/refrigerant heat exchanger 23, in direct communication with the outside or, alternatively, in direct communication with the other segment of the air recirculating conduit 19, so to allow external air to circulate through air/refrigerant heat exchanger 23 while, at the same time, preventing said external air from circulating through the air/water heat exchanger 25.
  • three-way valve 33 is preferably, though not necessarily, located between air/water heat exchanger 25 and centrifugal fan 20, whereas three-way valve 34 is preferably, though not necessarily, located between air/refrigerant heat exchanger 23 and washing tub 3.
  • This arrangement of valves 33 and 34 allows the use of centrifugal fan 20 for generating the airflow f along the whole air recirculating conduit 19, or the airflow f' along the segment of air recirculating conduit 19 that crosses the air/refrigerant heat exchanger 23.
  • the electronic central control unit 35 of the laundry washing and drying machine 1 opens the on-off valve 14 of drawer flush circuit 11 to fill up the bottom of washing tub 3 with an appropriate quantity of tap water.
  • central control unit 35 when tap water reaches the predetermined level within washing tub 3, central control unit 35
  • central control unit 35 switches on, respectively, centrifugal fan 20, compressing device 22, and pump 32 of the water circulation circuit 26, to enable heat-pump assembly 21 to transfer heat from the airflow f' circulating through air/refrigerant heat exchanger 23 and arriving from the outside of the household appliance, to the water circulating into water circulation circuit 26 and directed back to washing tub 3.
  • the high-temperature and high-pressure refrigerant coming out from compressing device 22 passes through hydraulic distributor 28 and reaches the water/refrigerant heat exchanger 24, inside which the refrigerant releases heat to the tap water arriving from the bottom of washing tub 3 and directed back to washing tub 3.
  • the high-temperature and high-pressure refrigerant arriving from compressing device 22 heats up the water circulating into water circulation circuit 26.
  • the high-pressure refrigerant coming out from compressing device 22 then passes through the refrigerant expansion device 27, wherein the refrigerant is rapidly expanded so that pressure and temperature of the refrigerant entering in the air/refrigerant heat exchanger 23 are much lower than pressure and temperature of the refrigerant coming out from the water/refrigerant heat exchanger 24.
  • the low-pressure and low-temperature refrigerant arriving from expansion device 27 and flowing back to compressing device 22 absorbs heat from the airflow f' circulating through air/refrigerant heat exchanger 23, thus rapidly cooling the airflow f' flowing along the segment of air recirculating conduit 19 that crosses the air/refrigerant heat exchanger 23.
  • the air/water heat exchanger 25 Since no air flows through the air/water heat exchanger 25, the air/water heat exchanger 25 operates like a traditional water conduit, and the temperature of the water arriving from the water/refrigerant heat exchanger 24 and directed back to washing tub 3 remains unchanged. In other words, all heat absorbed from the airflow f' arriving from the outside is transferred to the tap water circulating into water circulation circuit 26.
  • central control unit 35 may either switch off the hot-air generator 10 (i.e. centrifugal fan 20, compressing device 22 and pump 32) and start washing the laundry placed inside revolving drum 6 with the heated up tap water, or may open again on-off valve 14 to pour some more tap water into washing tub 3 and continue heating the water within the tub.
  • the hot-air generator 10 i.e. centrifugal fan 20, compressing device 22 and pump 32
  • central control unit 35 may either switch off the hot-air generator 10 (i.e. centrifugal fan 20, compressing device 22 and pump 32) and start washing the laundry placed inside revolving drum 6 with the heated up tap water, or may open again on-off valve 14 to pour some more tap water into washing tub 3 and continue heating the water within the tub.
  • central control unit 35 switches again the hydraulic distributor 28 to put the outlet of compressing device 22 in direct communication with the air/refrigerant heat exchanger 23 and the inlet of compressing device 22 in direct communication with the water/refrigerant heat exchanger 24; and switches the three-way valves 33 and 34 back in their first operative configuration to isolate the air recirculating conduit 19 from the outside, and to let the airflow f flow along the whole air recirculating conduit 19.
  • central control unit 35 switches on centrifugal fan 20, compressing device 22, and pump 32 of the water circulation circuit 26, to enable heat-pump assembly 21 to rapidly cool the airflow f coming out from washing tub 3 for condensing the surplus moisture in the airflow f, and then to rapidly heat the airflow f returning back into washing tub 3, so that the airflow f entering into washing tub 3 is heated rapidly to a temperature higher than or equal to that of the same air flowing out of the washing tub 3.
  • the cold water flowing in the water circulation circuit 26 is used for transferring heat from the airflow f coming out from washing tub 3 to the refrigerant flowing through the water/refrigerant heat exchanger 24.
  • the high temperature and pressure refrigerant coming out from compressing device 22 passes through hydraulic distributor 28 and reaches the air/refrigerant heat exchanger 23 inside which the refrigerant releases heat to the airflow f flowing into the air recirculating conduit 19, back to washing tub 3.
  • the high-temperature and high-pressure refrigerant arriving from compressing device 22 heats up the airflow f directed back into washing tub 3.
  • the high-pressure refrigerant coming out from compressing device 22 then passes through the refrigerant expansion device 27, wherein the refrigerant is rapidly expanded so that pressure and temperature of the refrigerant entering in the water/refrigerant heat exchanger 24 are much lower than pressure and temperature of the refrigerant coming out from the air/refrigerant heat exchanger 23.
  • the low-pressure and low-temperature refrigerant arriving from expansion device 27 and flowing back to compressing device 22 absorbs heat from the water arriving from the bottom of washing tub 3 and directed back to washing tub 3, thus rapidly cooling the water circulating into the water circulation circuit 26 and directed to the air/water heat exchanger 25.
  • the cold water circulating into the water circulation circuit 26 may consist in a given quantity of the rinsing water previously used in the rinsing phase of the washing and drying cycle, or may consist in a given quantity of fresh water provided by the water supply and recirculating system 9 (namely the drawer flush circuit 11).
  • the cold water circulating into the water circulation circuit 26 consists preferably, though not necessarily, in a given quantity of fresh water provided by the water supply and recirculating system 9.
  • the temperature of the washing water leaving the air/water heat exchanger 25 and directed back to the water/refrigerant heat exchanger 24 is slightly higher than the temperature of the washing water arriving from the water/refrigerant heat exchanger 24, and the increase in the water temperature is due to the heat amount absorbed from the airflow f arriving from washing tub 3. This heat amount is immediately transferred to the refrigerant flowing back to compressing device 22 within the water/refrigerant heat exchanger 24.
  • the water flowing into the water circulation circuit 26 only transfers heat from the airflow f arriving from washing tub 3 to the low-pressure and low-temperature refrigerant flowing back to compressing device 22.
  • the bottom of washing tub 3 is structured to contain a sufficient quantity of fresh or rinsing water to be used in the drying cycle, and, at the same time, to prevent said fresh or rinsing water to reach the revolving drum 6 and the laundry stored inside the drum.
  • heat-pump assembly 21 has lots of advantages. Firstly the heat exchange taking place in heat exchanger 24 of heat-pump assembly 21 always involves a fluid in gaseous state (i.e. the refrigerant) and a fluid in liquid state (i.e. the washing water stored in washing tub 3), thus heat exchanger 24 assures optimal heat-exchange performances both when laundry is dried, and when washing water is heated up.
  • a fluid in gaseous state i.e. the refrigerant
  • a fluid in liquid state i.e. the washing water stored in washing tub 3
  • the air/water heat exchanger 25 is a water spray condenser 25
  • the washing water circulating in water circulation circuit 26 can be used for capturing fluff or lint particles in the airflow f arriving from washing tub 3.
  • the water circulation circuit 26 may be integrated in the water recirculating and draining circuit 12, so as to reduce the number of water pumps.
  • the tree-way valve 17 instead of selectively channeling into water draining pipe 18 the water flowing along recirculating pipe 15, the tree-way valve 17 channels, on command, the water flowing along recirculating pipe 15 directly into water pipe 29; and the water recirculating and draining circuit 12 is provided with a second electrically controlled tree-way valve 17' which is located along water pipe 29 for channeling, on command, the water flowing along pipe 29 into water draining pipe 18.
  • pump 16 can suck the washing water from the bottom of washing tub 3 and feed said either towards revolving drum 6, or towards water/refrigerant heat exchanger 24.
  • the bi-directional closed-circuit refrigerant circulating means of heat-pump assembly 21 may lack the electrically controlled four-way hydraulic distributor 28, and may comprise instead two refrigerant compressing devices 22 which are connected to heat exchanger 23 and heat exchanger 24 via two electrically controlled three-way valves 36.
  • the two refrigerant compressing devices 22 are in anti-parallel one to the other, so that each three-way valves 36 communicates with the inlet of a first refrigerant compressing device 22, and with the outlet of a second refrigerant compressing device 22.
  • the electronic central control unit 35 of the laundry washing and drying machine 1 controls both three-way valves 36 so to selectively connect only one of the two refrigerant compressing devices 22 to heat exchanger 23 and heat exchanger 24, while keeping the other refrigerant compressing device 22 isolated.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)

Claims (10)

  1. Wäschewasch- und -trockenmaschine (1), umfassend ein Gehäuse (2), einen Wäschebehälter (3, 6) in dem Gehäuse zur Aufnahme der zu waschenden und zu trocknenden Wäsche und einen Heißluftgenerator (10), der in der Lage ist, einen Heißluftstrom im Inneren des Wäschebehälters (3, 6) umzuwälzen und das in dem Wäschebehälter (3, 6) gespeicherte Waschwasser aufzuheizen, wobei der Heißluftgenerator (10) folgendes umfasst:
    - eine Luftumwälzleitung (19), deren beide Enden mit dem Wäschebehälter (3,6) verbunden sind,
    - Belüftungsmittel (20), die in der Lage sind, entlang der Umwälzleitung (8) einen Luftstrom (f) zu erzeugen, der durch den Wäschebehälter (3, 6) fließt, und
    - eine Wärmepumpenanordnung (21), die in der Lage ist, den aus dem Wäschebehälter (3, 6) austretenden Luftstrom (f) rasch abzukühlen, um die überschüssige Feuchtigkeit in dem Luftstrom (f) zu kondensieren, und dann den in den Wäschebehälter (3, 6) zurückfließenden Luftstrom (f) rasch aufzuheizen,
    wobei die Wärmepumpenanordnung (21) eine bidirektionale Vorrichtung ist, die folgendes umfasst:
    - einen ersten (23) und einen zweiten Kühlmittel-Wärmetauscher (24), die so ausgelegt sind, dass das durch sie hindurch fließende Kühlmittel wahlweise Wärme von anderen Fluiden, die gleichzeitig durch den ersten (23) und zweiten Wärmetauscher (24) fließen, abgeben oder absorbieren kann, und
    - bidirektionale Kühlmittelzirkulationsmittel (22, 27, 28, 36), die in der Lage sind, ein Kühlmittel nacheinander durch den ersten (23) und zweiten Wärmetauscher (24) zirkulieren zu lassen und dieses Kühlmittel dabei nacheinander einer Kompression und einer Expansion beim Durchlaufen von einem Kühlmittel-Wärmetauscher (23, 24) zum anderen zu unterziehen, so dass alternativ der erste (23) oder der zweite Kühlmittel-Wärmetauscher (24) ein Hochdruck- und Hochtemperatur-Kühlmittel aufnehmen kann, während der andere Kühlmittel-Wärmetauscher ein Kühlmittel mit niedrigem Druck und niedriger Temperatur aufnimmt,
    wobei die Wäschewasch- und -trockenmaschine (1) dadurch gekennzeichnet ist, dass der erste Kühlmittel-Wärmetauscher (23) entlang der Luftumwälzleitung (19) angeordnet und so ausgelegt ist, dass das von den bidirektionalen Kühlmittelzirkulationsmitteln (22, 27, 28, 36) ankommende Kühlmittel und der zum Wäschebehälter (3, 6) geleitete Luftstrom (f, f') gleichzeitig durch diesen hindurchfließen, so dass das Kühlmittel Wärme an den Luftstrom (f, f') abgeben oder aus diesem absorbieren kann, wobei der zweite Kühlmittel-Wärmetauscher (24) statt dessen außerhalb der Luftumwälzleitung (19) angeordnet und so ausgelegt ist, dass das von dem Wäschebehälter (3, 6) ankommende Waschwasser und das von den bidirektionalen, einen geschlossenen Kreislauf bildenden Kühlmittelzirkulationsmitteln (22, 27, 28, 36) ankommende Kühlmittel gleichzeitig durch diesen hindurchfließen, so dass das Kühlmittel Wärme an das Waschwasser abgeben oder aus diesem absorbieren kann, wobei der Heißluftgenerator (10) zudem noch mit folgendem versehen ist:
    - einem Luft/Wasser-Wärmetauscher (25), der entlang der Luftumwälzleitung (19), stromaufwärts des ersten Kühlmittel-Wärmetauschers (23), angeordnet und so ausgelegt ist, dass der vom Wäschebehälter (3, 6) ankommende Luftstrom (f) und das von dem zweiten Kühlmittel-Wärmetauscher (24) ankommende Wasser gleichzeitig durch diesen hindurch fließen, so dass das Wasser Wärme aus dem Luftstrom (f) absorbieren kann, und
    - mit einem Wasserzirkulationskreislauf (26) zum Zirkulieren des in dem Wäschebehälter (3, 6) gespeicherten Wassers durch den zweiten Kühlmittel-Wärmetauscher (24) und den Luft/Wasser-Wärmetauscher (25).
  2. Wäschewasch- und -trockenmaschine nach Anspruch 1, wobei der Heißluftgenerator (10) auch mit Luftstromsteuermitteln (33, 34) versehen ist, die entlang der Luftumwälzleitung (19) angeordnet sind, um die Luftumwälzleitung (19) auf Befehl mit der Umgebung zu verbinden, so dass die Außenluft (f') durch den ersten Kühlmittel-Wärmetauscher (23) zirkulieren kann.
  3. Wäschewasch- und -trockenmaschine nach Anspruch 2, wobei die Luftstromsteuermittel (33, 34) auch in der Lage sind, eine Luftzirkulation durch den Luft/Wasser-Wärmetauscher (25) zu verhindern, wenn die Luftumwälzleitung (19) in Verbindung mit der Umgebung steht.
  4. Wäschewasch- und -trockenmaschine nach einem der vorhergehenden Ansprüche, wobei die Belüftungsmittel (20) entlang der Luftumwälzleitung (19), zwischen dem Luft/Wasser-Wärmetauscher (25) und dem ersten Kühlmittel-Wärmetauscher (23), angeordnet sind.
  5. Wäschewasch- und -trockenmaschine nach Anspruch 4, wobei die Luftstromsteuermittel (33, 34) zwei Dreiwegeventile (33, 34) oder dergleichen umfassen, die entlang der Luftumwälzleitung (19), auf beiden Seiten des ersten Kühlmittel-Wärmetauschers (23), angeordnet sind, um die Luftumwälzleitung (19) in zwei aufeinanderfolgende Segmente aufzuteilen, die jeweils einen entsprechenden Wärmetauscher (23, 24) kreuzen, wobei beide Dreiwegeventile (33, 34) oder dergleichen dazu ausgelegt sind, das Segment der Luftumwälzleitung (19), das den ersten Kühlmittel-Wärmetauscher (23) kreuzt, wahlweise direkt mit der Umwelt oder mit dem anderen Segment der Luftumwälzleitung (19) zu verbinden.
  6. Wäschewasch- und -trockenmaschine nach Anspruch 5, wobei ein erstes Dreiwegeventil (33) oder dergleichen zwischen dem Luft/Wasser-Wärmetauscher (25) und den Belüftungsmitteln (20) angeordnet ist und ein zweites Dreiwegeventil (34) oder dergleichen zwischen dem ersten Kühlmittel-Wärmetauscher (23) und dem Wäschebehälter (3, 6) angeordnet ist.
  7. Wäschewasch- und -trockenmaschine nach einem der vorhergehenden Ansprüche, wobei der Wasserzirkulationskreislauf (26) umfasst: ein erstes Rohr (15; 29), das den Boden des Wäschebehälters (3, 6) mit dem Einlass des zweiten Kühlmittel-Wärmetauschers (24) verbindet; ein zweites Rohr (30), das den Auslass des zweiten Kühlmittel-Wärmetauschers (24) mit dem Einlass des Luft/Wasser-Wärmetauschers (25) verbindet; ein drittes Rohr (31), das den Auslass des Luft/Wasser-Wärmetauschers (25) mit dem Wäschebehälter (3, 6) verbindet; und eine Wasserumwälzpumpe (16; 32), die entlang dem ersten (15; 29), zweiten (30) oder dritten Rohr (31) angeordnet ist, um auf Befehl das Waschwasser vom Boden des Wäschebehälters (3, 6) abzusaugen und dieses Wasser durch den zweiten Kühlmittel-Wärmetauscher (24) und den Luft/Wasser-Wärmetauscher (25) zirkulieren zu lassen, bevor es wieder dem Wäschebehälter (3, 6) zugeführt wird.
  8. Wäschewasch- und -trockenmaschine nach einem der vorhergehenden Ansprüche, wobei der Wäschebehälter (3, 6) einen Laugenbehälter (3), der schwebend im Inneren des Gehäuses (2) aufgehängt ist, und eine Drehtrommel (6) zur Aufnahme der zu waschenden und/oder zu trocknenden Wäsche umfasst, die axial drehbar im Inneren des Laugenbehälters (3) befestigt ist.
  9. Wäschewasch- und -trockenmaschine nach Anspruch 7 und 8, wobei die Wäschewasch- und -trockenmaschine (1) zudem einen Waschwasser-Umwälz- und -Ablass-Kreislauf (12) zum Absaugen des Waschwassers vom Boden des Laugenbehälters (3) und Rückführen des Wassers in die Drehtrommel (6) oder alternativ zum Einspeisen des Wassers in eine externe Abwasserauslassleitung umfasst, wobei der Wasserzirkulationskreislauf (26) in den Waschwasser-Umwälz- und Ablass-Kreislauf (12) integriert ist.
  10. Wäschewasch- und -trockenmaschine nach einem der vorhergehenden Ansprüche, wobei die bidirektionalen Kühlmittelzirkulationsmittel (22, 27, 28) folgendes umfassen:
    - Kühlmittel-Kompressionsmittel (22) zum Komprimieren eines gasförmigen Kühlmittels, so dass der Kühlmitteldruck und die Kühlmitteltemperatur am Auslass deutlich höher als am Einlass der Kühlmittel-Kompressionsmittel (22) sind,
    - eine Kühlmittel-Expansionsvorrichtung (27), die das vom ersten Kühlmittel-Wärmetauscher (23) zum zweiten Kühlmittel-Wärmetauscher (24) oder umgekehrt fließende Kühlmittel einer raschen Expansion unterzieht, um Druck und Temperatur des Kühlmittels zu senken, und
    - einen hydraulischen Verteiler (28), der die Kühlmittel-Kompressionsmittel (22) sowohl mit dem ersten (23) als auch mit dem zweiten Kühlmittel-Wärmetauscher (24) verbindet und so aufgebaut ist, dass er wahlweise den Auslass der Kühlmittel-Kompressionsmittel (22) mit dem ersten (23) oder alternativ dazu mit dem zweiten Kühlmittel-Wärmetauscher (24) verbindet und den Einlass der Kühlmittel-Kompressionsmittel (22) mit dem anderen Kühlmittel-Wärmetauscher (23, 24) verbindet, um auf Befehl den Kühlmittelfluss entlang dem ersten Kühlmittel-Wärmetauscher (23), der Kühlmittel-Expansionsvorrichtung (27) und dem zweiten Kühlmittel-Wärmetauscher (24) zu wählen.
EP20080169589 2008-11-21 2008-11-21 Waschmaschine und Trockner Not-in-force EP2189568B1 (de)

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AT08169589T ATE540154T1 (de) 2008-11-21 2008-11-21 Waschmaschine und trockner
EP20080169589 EP2189568B1 (de) 2008-11-21 2008-11-21 Waschmaschine und Trockner
BRPI0920911A BRPI0920911A2 (pt) 2008-11-21 2009-09-03 máquina de lavagem e secagem de roupas.
PCT/EP2009/006394 WO2010057547A1 (en) 2008-11-21 2009-09-03 Laundry washing and drying machine
CN2009801532154A CN102272373B (zh) 2008-11-21 2009-09-03 洗衣、干衣机
US13/130,334 US20120272689A1 (en) 2008-11-21 2009-09-03 Laundry Washing and Drying Machine

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EP20080169589 EP2189568B1 (de) 2008-11-21 2008-11-21 Waschmaschine und Trockner

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ATE540154T1 (de) 2012-01-15
EP2189568A1 (de) 2010-05-26
BRPI0920911A2 (pt) 2015-12-29
WO2010057547A1 (en) 2010-05-27
CN102272373B (zh) 2013-03-27
CN102272373A (zh) 2011-12-07
US20120272689A1 (en) 2012-11-01

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