EP4305231A1 - Sèche-linge à condenseur ayant une pompe à chaleur et une partie d'air recyclé, et procédé pour faire fonctionner le sèche-linge à condenseur - Google Patents

Sèche-linge à condenseur ayant une pompe à chaleur et une partie d'air recyclé, et procédé pour faire fonctionner le sèche-linge à condenseur

Info

Publication number
EP4305231A1
EP4305231A1 EP22707670.0A EP22707670A EP4305231A1 EP 4305231 A1 EP4305231 A1 EP 4305231A1 EP 22707670 A EP22707670 A EP 22707670A EP 4305231 A1 EP4305231 A1 EP 4305231A1
Authority
EP
European Patent Office
Prior art keywords
air
condenser
rel
drum
air duct
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
Application number
EP22707670.0A
Other languages
German (de)
English (en)
Inventor
Alvaro Harbach
Martin Korte
Andreas Stolze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
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 BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP4305231A1 publication Critical patent/EP4305231A1/fr
Pending legal-status Critical Current

Links

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
    • D06F58/02—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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/26—Condition of the drying air, e.g. air humidity or temperature
    • 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 
    • D06F58/24—Condensing 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
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/36—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F58/38—Control of operational steps, e.g. for optimisation or improvement of operational steps depending on the condition of the laundry of drying, e.g. to achieve the target humidity
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/32—Temperature
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/34—Humidity
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/36—Flow or velocity
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/16—Air properties
    • D06F2105/24—Flow or velocity
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/30—Blowers
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/32—Air flow control means
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/36—Condensing arrangements, e.g. control of water injection therefor
    • 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
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/48—Control of the energy consumption

Definitions

  • the invention relates to a condensation dryer with a heat pump and a proportion of circulating air, as well as a method for its operation.
  • the invention relates in particular to a condensation dryer with a drum for items of laundry to be dried, a supply air duct, an exhaust air duct from which branches off a circulating air duct which opens into the supply air duct in front of a drum inlet, a blower, a heat pump with a condenser which is arranged in the supply air duct, an evaporator disposed in the exhaust air duct, a throttle and a compressor, and a controller and a heater; and a preferred method for its operation.
  • tumble dryers are operated as exhaust air or condensation dryers.
  • Condensation dryers which function by condensing the moisture from the laundry evaporated using warm process air, enable energy to be recovered from the heated process air, for example by using a heat pump.
  • the condensate that occurs in the condensation dryer is collected and either pumped out or disposed of by manually emptying a collection container.
  • the publication DE 30 00 865 A1 describes a tumble dryer with heat recovery.
  • the tumble dryer consists of a container that accommodates and moves the laundry, into which a supply air flow heated by a heating element flows, while the moist, warm air is routed as exhaust air via an outlet.
  • a heat exchanger is arranged in the supply air stream in front of the heating element, through which the hot, humid exhaust air from the container flows.
  • the publication DE 197 31 826 A1 describes a tumble dryer with a system for heat recovery (e.g. a heat pump), in which the largely closed air circuit can exchange the circulating air with the room air at two specified points through two openings in order to increase the drying and condensation temperature to maintain the specified values.
  • the publication EP 2037034 B1 describes an exhaust air dryer with a heat pump and a cleaning device for the evaporator.
  • the publication DE 43 06 217 B4 describes a program-controlled laundry dryer with a laundry drum, in which the process air is conveyed through the laundry drum by means of a blower in a closed process air duct which has closure devices.
  • the tumble dryer also has a heat pump circuit made up of an evaporator, compressor and condenser, which is set up to precipitate the moisture in the process air from the laundry drum.
  • the closure devices are arranged in such a way that the routing of the process air depends on a process phase.
  • an exhaust air dryer with a heat pump heat is extracted from the exhaust air from the drying chamber, usually a drum, by the evaporator of the heat pump, and this heat is fed back to the supply air via the condenser. Since the exhaust air dryer is an open system, in contrast to a condensation dryer with a closed process air circuit, sensible heat is also recovered in addition to the latent heat. As a result, an exhaust air dryer with heat recovery can consume less energy than a condensation dryer despite a condensation efficiency of less than 50%, for example. Depending on the efficiency of the heat pump, heat from the environment surrounding the heat pump is coupled in. However, for more efficient operation, a higher condensing efficiency would be desirable.
  • an exhaust air dryer can have the disadvantage of an overall energy balance of the installation location, since the usually warmer room air is exchanged several times with colder outside air. With open air duct systems with condensation efficiencies greater than 80%, this disadvantage is eliminated because the exhaust air does not have to be routed out of the installation room.
  • the publication DE 103 49 712 A1 describes a method for drying laundry in a tumble dryer with a program control device, a drying chamber and a process air duct in which a blower for conveying the drying air through the drying chamber and a heating device are arranged, with the process air duct having a fresh air supply as well as an exhaust air discharge is formed and being arranged in the process air duct means for separating the dry air flow into an exhaust air portion and a recirculated air portion.
  • the publication DE 34 46 468 A1 describes a method for drying laundry in a tumble dryer with a drivable laundry drum, a fan, a heater arranged in the flow path of the drying air and a cooled condenser through which the drying air is guided after it has exited the laundry drum.
  • the drying air is split into two partial air flows after exiting the laundry drum. One part of the air flow is fed to the condenser and the other is mixed back into the partial air flow emerging from the condenser, bypassing the condenser.
  • the publication DE 34 19 743 C2 describes a tumble dryer with a laundry drum, a heating unit provided with a supply air connection and an exhaust air connection, with different additional units that determine the mode of operation of the dryer being switchable to be arranged between the supply air connection of the heating unit and the exhaust air connection.
  • a recirculation part in which there is an air control device, is interposed between the inlet air connection piece and the exhaust air connection piece, as a result of which the inlet and outlet air ratio of the dryer can be varied.
  • the publication DE 10 2007 042969 A1 describes a dryer with a drying chamber for objects to be dried, a process air duct in which there is a heater for heating the process air and a blower for guiding the heated process air from an inlet air inlet through the drying chamber to an outlet air outlet and at least one heat exchanger are located.
  • the heat exchanger is arranged between the drying chamber and the exhaust air outlet.
  • a circulating air duct branches off from the process air duct, through which part of the process air can be routed to the heater.
  • the at least one heat exchanger can be formed by an evaporator and a condenser of a heat pump.
  • the object of the present invention was to provide a condensation dryer with an open air system and a heat pump for heat recovery, which has high energy efficiency. In doing so part of the warm, humid process air from the drum can be used as circulating air. In addition, it was an object of the present invention to provide a method for its operation.
  • condensation dryer and a method for its operation with the features of the respective independent patent claims.
  • Preferred embodiments of the condensation dryer according to the invention and of the method according to the invention are listed in the corresponding dependent patent claims.
  • Preferred embodiments of the condensation dryer according to the invention correspond to preferred embodiments of the method according to the invention and vice versa, even if this is not explicitly stated here.
  • the subject matter of the invention is therefore a condensation dryer with a drum for receiving items of laundry to be dried, an air supply duct, an air exhaust duct from which a circulating air duct branches off and opens into the air supply duct in front of a drum inlet, a blower, a heat pump with a condenser which is located in the air supply duct is arranged, an evaporator, which is arranged in the exhaust air duct, a throttle and a compressor, as well as a control device and a heating device, wherein the condensation dryer is set up in such a way that, in a drying program carried out therein, warm, moist process air from the drum is delimited downstream by the evaporator Exhaust air duct part flows essentially in the same direction as supply air in an inlet area of the supply air duct containing the condenser, and the process air leaving the drum has a relative humidity F rel for which F rel min ⁇ F rel ⁇ F rel max applies, where F rel m into e in is a pre
  • the air condition at the drum outlet is influenced by the size of the air volume flow, the temperature in the drum and the relative humidity of the process air Drum inlet, the airflow through the drum, and the load and type of laundry.
  • Relative humidity is an indirect measure of the sensible heat content of the process air. Although the sensible heat is also recovered as energy in an open air duct with a heat pump, as is present in the condensation dryer according to the invention, thereby increasing the drying speed, this proportion should be small in relation to the latent heat for high condensation efficiency.
  • an additional heat exchanger to meet the condensation efficiency e.g. a subcooler
  • the efficiency of the condensation dryer increases with the present invention.
  • the circulating air duct opens into the supply air duct downstream of the condenser in the flow direction of the supply air.
  • the circulating air channel opens into the supply air channel before or at the condenser in the direction of flow of the supply air, thus leading to an increased air flow through the condenser.
  • a flow measuring device is arranged in the supply air duct before and after the condenser. A proportion of added circulating air from the drum can thus be determined.
  • a condensation dryer is particularly preferred in which the exhaust air duct part and the condenser have a common wall which has a plurality of Has holes that form the circulating air duct.
  • the multiplicity of holes are located in an inlet area of the condenser.
  • the shape and number of the holes is not restricted, provided that the large number of these holes allows a proportion of the circulating air that is desired according to the invention to be implemented.
  • a condensation dryer in which the plurality of holes is designed in order to design an air volume flow through the condenser in a drying program carried out in the condensation dryer in cooperation with the blower in such a way that it is 15 to 50% by volume, preferably 20 to 40% by volume, consists of circulating air.
  • the air volume flow over the condenser which is significantly increased in relation to the evaporator, also leads to an improvement in the efficiency of the heat pump. With unchanged efficiency, the heat exchangers, in particular an additional heat exchanger, can be dimensioned smaller. However, if the air volume flow via the condenser is not increased, the volume flow of the supply and exhaust air is reduced with the result that the noise level of the condensation dryer drops while the efficiency remains the same.
  • an increase in the proportion of circulating air can be realized, for example, by increasing the blower output and thus the conveying capacity of the blower.
  • Increasing the blower output leads to an increase in the negative pressure in the supply air duct and an increase in the positive pressure in the exhaust air duct. This increases the pressure difference for the passage of process air from the drum or the exhaust air duct into the supply air duct, in particular in the inlet area of the condenser.
  • the condensation dryer may advantageously include a device that allows control of a total effective opening area of the plurality of holes.
  • a device that allows control of a total effective opening area of the plurality of holes.
  • such a device can be designed to completely or partially cover some holes, wherein the cover can also be realized, for example, with a partially air-permeable foam that impedes the passage of air.
  • Another coverage option is to use an adjustable blind.
  • the heat pump contains an additional cooler, also referred to as a sub-cooler. In this way, the functioning of the heat pump can be better controlled and, in particular, its overheating can be prevented.
  • the present invention makes it possible to avoid the use of an auxiliary cooler. This is the case when the proportion of the process air in the circulating air duct that reaches the condenser directly in embodiments of the invention is sufficiently large.
  • the heat pump therefore does not contain an additional cooler.
  • Also preferred according to the invention is a condensation dryer in which a relationship between a number of revolutions u of the fan and a ratio r between an air flow rate vc in the condenser and an air flow rate V E in the evaporator is stored in the control device. This enables better control of the proportion of circulating air in the condensation dryer according to the invention.
  • a condensation dryer in which a humidity sensor for determining the relative humidity F rel of the process air leaving the drum is arranged at the outlet from the drum. Because it is possible to carry out the invention on the basis of empirical values for the relative air humidity and its dependencies on various parameters. However, measuring the relative humidity F rel leads to more accurate results. The additional use of a temperature sensor at the exit from the drum is advantageous.
  • Controllable closure devices can be located in the individual ducts such as the supply air duct, the circulating air duct and the exhaust air duct in order to improve the control of the air flows and in particular the proportion of supply air in an air flow through the condenser. Flaps, for example, can be used as controllable closing devices, which can be opened to different extents independently or depending on one another.
  • the dryer preferably includes an electrical heating device, so that process air can be heated both by means of the condenser and by means of the electrical heating device. Since the energy required for drying decreases as the degree of drying of the items of laundry to be dried in the condensation dryer increases, it is expedient to control the heating device accordingly, ie to reduce its heat output as the degree of drying increases. In the case of the condensation dryer of the present invention, if the evaporator inlet temperature is too high, the proportion of circulating air can be reduced as a function of the temperature.
  • the use of a circulating air duct or the passage of the hot, moisture-laden circulating air through the circulating air duct to the heating device generally raises the air temperature in front of the heating device. However, due to the increased airflow over the heater, the drum inlet temperature can remain within an allowable range.
  • the amount of supply air in the supply air duct can be controlled using controllable closing devices, for example, so that the supply of supply air is stopped in an initial phase of a drying program and only circulating air is used as process air.
  • exhaust air, supply air and/or refrigerant are each passed through the corresponding heat exchanger in a cross-flow or counter-flow process.
  • the evaporator of the heat pump is located in the exhaust air duct in order to extract heat from the warm, humid air from the drum, which generally flows into an installation room via the exhaust air duct.
  • the warm, moisture-laden process air is mainly cooled in the evaporator of the heat pump, where the transferred heat is used to vaporize an im Heat pump circuit used refrigerant is used.
  • the refrigerant from the heat pump that has evaporated as a result of the heating is fed via a compressor to the condenser of the heat pump, where the condensation of the gaseous refrigerant releases heat, which is used to heat the process air or the supply air before it enters the drying chamber.
  • the blower is preferably arranged directly after the condenser or directly before the condenser.
  • the invention also relates to a method for operating a condensation dryer with a drum for receiving items of laundry to be dried, a supply air duct, an exhaust air duct from which a circulating air duct branches off and opens into the supply air duct in front of a drum inlet, a blower, a heat pump with a condenser , which is arranged in the supply air duct, an evaporator, which is arranged in the exhaust air duct, a throttle and a compressor, as well as a control device and a heating device, the condensation dryer being set up in such a way that, in a drying program carried out therein, moist, warm process air from the drum is discharged in a downstream exhaust air duct part delimited by the evaporator, flows essentially in the same direction as supply air in an inlet area of the supply air duct containing the condenser, and the process air leaving the drum has a relative humidity F rel for which F rel min ⁇ F rel ⁇ F rel m ax applies, where F rel
  • the expression "essentially flows in the same direction" is intended to take account of the fact that the proportion of circulating air, ie the proportion of the process air which, in embodiments of the invention, flows through the plurality of holes as one embodiment of the circulation channel used according to the invention, is transverse to this direction or even vertical and therefore influences the flow in the exhaust and recirculation ducts.
  • the blower is controlled by the control device in such a way that an air volume flow through the condenser consists of 15 to 50% by volume, preferably 20 to 40% by volume, of circulating air.
  • a method is also preferred in which a ratio r between an air flow rate vc in the condenser and an air flow rate V E in the evaporator is greater than 1, preferably greater than 1.2.
  • the method according to the invention is preferably carried out after the process air leaving the drum has reached a predetermined minimum temperature. At this point in time there is generally a very high relative humidity F rel at the drum outlet, preferably even a maximum relative humidity F rel max . The invention then makes it possible to maintain such a high relative humidity. The method according to the invention is thus preferably carried out in a main drying phase.
  • the relative humidity F rel of the process air leaving the drum decreases, in particular when the main drying phase, in which the majority of the moisture content of the laundry items is removed, has ended.
  • An increase in the relative humidity F rel at the drum outlet can therefore very advantageously also be achieved in such a final phase of a drying program which follows the main drying phase, for example by increasing the speed u of the blower.
  • the load of items of laundry also has an influence on the relative humidity F rel of the process air.
  • a loading of the drum with items of laundry is therefore advantageously also determined in a manner known per se.
  • a relationship between the load and F rel min or F rel max can then advantageously be stored in the control device, so that these values can be set in a more targeted manner.
  • the condensation dryer according to the invention and the method according to the invention have the advantage that the condensation dryer can work in an energy-efficient manner with a high condensation efficiency.
  • a heat pump for heat recovery and, in addition, a portion of the process air that is branched off after the outlet from the drum and fed back in as circulating air before or after the condenser, the efficiency and/or the noise level of the Condensation dryer to be improved.
  • Figure 1 shows a perspective view of a prior art condensation dryer with a heat pump, in which no supply air duct is used for partial recirculation of process air from the drum.
  • FIG. 2 shows a vertical section through the condensation dryer of FIG. 1, in which the air flow through the supply air duct, drum and exhaust air duct is shown.
  • FIG 3 shows a vertical section through a condensation dryer according to a first embodiment of the invention, in which part of the process air from the drum is supplied to a condenser in the supply air duct via a circulating air duct.
  • FIG. 4 shows a vertical section through the condensation dryer according to the invention according to a first embodiment, in which part of the process air from the drum is supplied to a condenser in the supply air duct via a circulating air duct.
  • FIG. 3 there are no arrows showing the flow of air in the condensation dryer for reasons of clarity.
  • the condensation dryer according to the invention shows (thick arrows), the thin arrows showing the flow of a refrigerant through the components of the used
  • Fig. 6 shows a scheme showing the flow of process air through the condenser, the drum, the evaporator and a subcooler according to a third embodiment of the condensation dryer according to the invention (thick arrows), the thin arrows showing the flow of a refrigerant through the components of the used
  • FIG. 7 shows a perspective top view of a lower part of a condensation dryer used according to the invention, in which in particular a common wall separating the condenser from the exhaust air duct can be seen, which has a large number of holes in an inlet area of the condenser, which can function as a recirculation duct.
  • FIG. 1 shows a perspective view of a condensation dryer 1 from the prior art with a heat pump, of which the condenser 8 and the evaporator 9 can be seen here.
  • this condensation dryer no supply air duct is used for the partial recirculation of process air from the drum 2.
  • the air flow through the condensation dryer is illustrated by the arrows.
  • the bright arrow means supply air from a room in which the condensation dryer is set up, which is conveyed in the supply air duct 3 due to the use of a fan, not shown here.
  • This supply air is heated in the condenser 8 and the process air that is then heated is passed on to and into the drum 2 .
  • the warm and humid process air then leaves the drum 2 at the drum outlet 18.
  • the process air has the comparatively highest temperature here, which is shown by the black arrows.
  • the moist, warm process air is cooled with condensation (not shown here) of the moisture in the evaporator 9 and conveyed in the exhaust air duct 4 into an installation room for the condensation dryer 1 .
  • 17 means a subcooler in the heat pump circuit.
  • Fig. 2 shows a vertical section through the condensation dryer 1 of FIG. 1, in which the air flow through the supply air duct 3, drum 2 and exhaust air duct 4 is shown.
  • the same reference numerals here have the same meaning as in FIG. 1.
  • 7 means a fan.
  • 3 shows a vertical section through a condensation dryer 1 according to a first embodiment of the invention, in which part of the process air from the drum 2 is supplied to a condenser 8 in the supply air duct 3 via a circulating air duct 5 .
  • the circulating air duct 5 is located here in an inlet part 13 of the air supply duct 3.
  • 12 means a partial exhaust air duct in which the process air flows essentially in the same direction as in the air supply duct, i.e. in particular in the condenser 8.
  • FIG. 4 shows a vertical section through the inventive condensation dryer 1 according to a first embodiment, in which part of the process air from the drum 2 is supplied to a condenser 8 in the supply air duct 3 via a circulating air duct 5 .
  • FIG. 3 shows a vertical section through the inventive condensation dryer 1 according to a first embodiment, in which part of the process air from the drum 2 is supplied to a condenser 8 in the supply air duct 3 via a circulating air duct 5 .
  • FIG. 3 shows a vertical section through the inventive condensation dryer 1 according to a first embodiment, in which part of the process air from the drum 2 is supplied to a condenser 8 in the supply air duct 3 via a circulating air duct 5 .
  • FIG. 3 shows a vertical section through the inventive condensation dryer 1 according to a first embodiment, in which part of the process air from the drum 2 is supplied to a condenser 8 in the supply air duct 3 via a circulating air duct 5 .
  • FIG. 3 shows a
  • Fig. 5 shows a scheme showing the flow of process air through the condenser 8, the drum 2, the evaporator 8 and a subcooler 17 according to a second embodiment of the condensation dryer 1 according to the invention (thick arrows), the thin arrows showing the flow of a refrigerant through the components of the heat pump used.
  • the refrigerant is routed in the refrigerant circuit, which also has a throttle 10 and a compressor 11 here.
  • the curved thick arrow shows here that part of the process air from the drum 2 after the condenser 8 is fed back into the supply air duct, which is not shown here and contains the condenser 8 .
  • Fig. 6 shows a scheme, represented by thick arrows, the flow of process air through the condenser 8, the drum 2, the evaporator 9 and a subcooler 17 according to a third embodiment of the condensation dryer 1 according to the invention, the thin arrows showing the flow of a refrigerant through the components of the heat pump used.
  • the refrigerant is routed in the refrigerant circuit additionally has a throttle 10 and a compressor 11 here.
  • the curved thick arrow shows here that a part of the process air from the drum 2, compared to FIG. Fig.
  • FIG. 7 shows a perspective plan view of a lower part of a condensation dryer used according to the invention, in which in particular a common wall 14 separating the condenser 8 from the exhaust air duct (not shown here) can be seen, which has a large number of holes 15 in an inlet area 16 of the condenser 8 . 13 means an input part of the supply air duct, also not shown here.
  • drum outlet 18 outlet (for process air from the drum), drum outlet

Landscapes

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

Abstract

L'invention concerne un sèche-linge à condenseur (1), comprenant : - un tambour (2) pour faire sécher le linge ; - un canal d'alimentation en air (3) ; - un canal d'air d'échappement (4), à partir duquel un canal d'air recyclé (5) bifurque, le canal d'air recyclé débouchant dans le canal d'alimentation en air (3) en amont d'une entrée de tambour (6) ; - un ventilateur (7) ; - une pompe à chaleur (8, 9, 10, 11) qui comporte un condenseur (8) disposé dans le canal d'alimentation en air (3), un évaporateur (9) disposé dans le canal d'air d'échappement (4), un organe d'étranglement (10) et un compresseur (11) ; - un dispositif de commande ; et - un dispositif de chauffage. Le sèche-linge à condenseur (1) est conçu de telle sorte que, dans un programme de séchage qui y est exécuté, de l'air de traitement chaud humide provenant du tambour (2) s'écoule, dans une partie de canal d'air d'échappement (12) délimitée par l'évaporateur (9) sensiblement dans la même direction que l'air fourni dans une partie d'entrée (13) du canal d'alimentation en air (3), ladite partie d'entrée contenant le condenseur (8), et l'air de traitement sortant du tambour (2) ayant une humidité relative Frel pour laquelle : Frelmin ≤ Frel ≤ Frelmax, Frelmin étant une valeur minimale spécifiée et Frelmax étant une valeur maximale de l'humidité relative pouvant être obtenue dans le programme de séchage. L'invention concerne également un procédé préféré pour faire fonctionner ledit sèche-linge à condenseur.
EP22707670.0A 2021-03-09 2022-02-17 Sèche-linge à condenseur ayant une pompe à chaleur et une partie d'air recyclé, et procédé pour faire fonctionner le sèche-linge à condenseur Pending EP4305231A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021202230.8A DE102021202230A1 (de) 2021-03-09 2021-03-09 Kondensationstrockner mit Wärmepumpe und Umluftanteil sowie Verfahren zu seinem Betrieb
PCT/EP2022/053928 WO2022189115A1 (fr) 2021-03-09 2022-02-17 Sèche-linge à condenseur ayant une pompe à chaleur et une partie d'air recyclé, et procédé pour faire fonctionner le sèche-linge à condenseur

Publications (1)

Publication Number Publication Date
EP4305231A1 true EP4305231A1 (fr) 2024-01-17

Family

ID=80628901

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22707670.0A Pending EP4305231A1 (fr) 2021-03-09 2022-02-17 Sèche-linge à condenseur ayant une pompe à chaleur et une partie d'air recyclé, et procédé pour faire fonctionner le sèche-linge à condenseur

Country Status (5)

Country Link
US (1) US20240167215A1 (fr)
EP (1) EP4305231A1 (fr)
CN (1) CN116981805A (fr)
DE (1) DE102021202230A1 (fr)
WO (1) WO2022189115A1 (fr)

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3000865A1 (de) 1980-01-11 1981-07-16 Fichtel & Sachs Ag, 8720 Schweinfurt Waeschetrockner mit waermerueckgewinnung
DE3419743C2 (de) 1984-05-26 1993-10-21 Miele & Cie Trommeltrockner für Wäsche
DE3446468A1 (de) 1984-12-20 1986-07-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren und vorrichtung zum trocknen von waesche
DE4023000C2 (de) 1990-07-19 2003-02-27 Bsh Bosch Siemens Hausgeraete Wäschetrockner mit einem Wärmepumpenkreis
DE4306217B4 (de) 1993-02-27 2004-04-22 AEG Hausgeräte GmbH Programmgesteuerter Wäschetrockner mit einem Wärmepumpenkreis
DE19731826A1 (de) 1997-07-24 1998-02-12 Joachim Rieder Wäschetrockner mit kontinuierlicher Wärmerückgewinnung
DE10349712B4 (de) 2003-10-23 2007-03-01 Miele & Cie. Kg Verfahren zum Trocknen von Wäsche und Wäschetrockner zur Durchführung des Verfahrens
DE102005041145A1 (de) * 2005-08-29 2007-03-01 Alpha-Innotec Gmbh Wäschetrockner
DE102007042969B4 (de) 2007-09-10 2021-05-27 BSH Hausgeräte GmbH Trockner mit Wärmerückgewinnung und Umluftanteil
KR100925739B1 (ko) 2007-09-13 2009-11-11 엘지전자 주식회사 덕트리스 건조기
DE102008043176B4 (de) 2008-10-24 2021-08-26 BSH Hausgeräte GmbH Trockner mit Wärmepumpe, Verfahren zu seinem Betrieb und Verfahren zur Klimatisierung eines Raumes
DE102008055087A1 (de) 2008-12-22 2010-06-24 BSH Bosch und Siemens Hausgeräte GmbH Trockner mit Wärmepumpe und Umluftanteil sowie Verfahren zu seinem Betrieb
DE102009002482A1 (de) * 2009-04-20 2010-10-21 BSH Bosch und Siemens Hausgeräte GmbH Energieeffizienter Trockner und Verfahren zu seinem Betrieb
AU2011290068B2 (en) 2010-08-09 2015-02-05 Lg Electronics Inc. Clothes dryer
DE102016210265A1 (de) * 2016-06-10 2017-12-14 BSH Hausgeräte GmbH Verfahren zur Ermittlung der Endrestfeuchte in einem Kondensationstrockner sowie hierfür geeigneter Kondensationstrockner
DE102018203158A1 (de) 2018-03-02 2019-09-05 BSH Hausgeräte GmbH Gerät zum Trocknen von Wäsche

Also Published As

Publication number Publication date
CN116981805A (zh) 2023-10-31
US20240167215A1 (en) 2024-05-23
WO2022189115A1 (fr) 2022-09-15
DE102021202230A1 (de) 2022-09-15

Similar Documents

Publication Publication Date Title
EP2202347A1 (fr) Séchoir doté d'une pompe à chaleur et d'une teneur en air ambiant et son procédé de fonctionnement
EP2115208B1 (fr) Sèche-linge à condensation équipé d'une pompe à chaleur et procédé pour faire fonctionner ce sèche-linge
EP2134897B1 (fr) Séchoir à récupération de chaleur et procédé de fonctionnement
DE60304948T2 (de) Wäschetrommeltrockner mit Abluft
DE4306217A1 (de) Programmgesteuerter Wäschetrockner mit einem Wärmepumpenkreis
DE19638865C2 (de) Kondensationswäschetrockner mit einer Wärmepumpeneinrichtung
EP2058428B1 (fr) Séchoir doté d'une pompe à chaleur
DE60219112T2 (de) Verfahren und Vorrichtung zur Trocknung mittels Luftzirkulation
EP2093322B1 (fr) Séchoir doté d'un moteur refroidi
DE4434205A1 (de) Wäschetrockner
DE102007013997A1 (de) Kondensationstrockner und Verfahren zum Betreiben eines Kondensationstrockners
DE102007016077A1 (de) Verfahren zum Betreiben eines Kondensationstrockners mit einem Wärmepumpenkreis, sowie entsprechender Kondensationstrockner
EP2160488B1 (fr) Sécheur à condensation muni d'une pompe à chaleur, et procédé pour le faire fonctionner
DE2914859A1 (de) Waeschetrockner
DE102007042969B4 (de) Trockner mit Wärmerückgewinnung und Umluftanteil
DE102009002482A1 (de) Energieeffizienter Trockner und Verfahren zu seinem Betrieb
DE602004007240T2 (de) Haushaltswäschetrockner mit zweistufigem Kondensator
EP1205592B1 (fr) Armoire sèche-linge
EP2055826A1 (fr) Sèche-linge à évacuation d'air doté d'une récupération de chaleur et cuve de condensation ainsi que son procédé de fonctionnement
DE602004010877T2 (de) Trockungsverfahren und Wäschetrockner
WO2022189115A1 (fr) Sèche-linge à condenseur ayant une pompe à chaleur et une partie d'air recyclé, et procédé pour faire fonctionner le sèche-linge à condenseur
DE3543722A1 (de) Waeschetrockner
DE19642164C2 (de) Wäschetrockner mit einem Wärmepumpenkreis
DE19642165A1 (de) Wäschetrockner mit einem Wärmepumpenkreis
DE102008016473A1 (de) Trockner mit gekühltem Motor sowie Verfahren zu seinem Betrieb

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20231009

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

RIC1 Information provided on ipc code assigned before grant

Ipc: D06F 58/48 20200101ALN20240724BHEP

Ipc: D06F 105/30 20200101ALN20240724BHEP

Ipc: D06F 103/34 20200101ALN20240724BHEP

Ipc: D06F 103/32 20200101ALN20240724BHEP

Ipc: D06F 58/38 20200101ALI20240724BHEP

Ipc: D06F 58/20 20060101ALI20240724BHEP

Ipc: D06F 58/02 20060101AFI20240724BHEP

INTG Intention to grant announced

Effective date: 20240820