EP2122039B1 - Séchoir à condensation comprenant une pompe à chaleur ainsi que procédé de fonctionnement - Google Patents

Séchoir à condensation comprenant une pompe à chaleur ainsi que procédé de fonctionnement Download PDF

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Publication number
EP2122039B1
EP2122039B1 EP07857754A EP07857754A EP2122039B1 EP 2122039 B1 EP2122039 B1 EP 2122039B1 EP 07857754 A EP07857754 A EP 07857754A EP 07857754 A EP07857754 A EP 07857754A EP 2122039 B1 EP2122039 B1 EP 2122039B1
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EP
European Patent Office
Prior art keywords
circuit
heat pump
process air
heat
secondary fluid
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Active
Application number
EP07857754A
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German (de)
English (en)
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EP2122039A1 (fr
Inventor
Dietmar Steiner
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
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BSH Bosch und Siemens Hausgeraete GmbH
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Publication of EP2122039A1 publication Critical patent/EP2122039A1/fr
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—Heat pump arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing arrangements

Definitions

  • the invention relates to a condensation dryer with a drying chamber for objects to be dried, a process air circuit in which the process air can be guided by means of a blower over the objects to be dried, and a heat pump circuit for alternately heating and cooling the process air.
  • the invention also relates to a method of operating such a condensation dryer.
  • Tumble dryers whose operation is based on the condensation of moisture vaporized by means of warm process air from the laundry - so-called condensation dryers - are very popular because they produce no exhaust air laden with moisture and no hose for dissipating this exhaust air from a building in which such a tumble dryer is set up. Condensation dryers can therefore be used in internal bathrooms or laundry rooms of larger residential complexes.
  • a condensation dryer process air is passed through a fan via a heater in the wet laundry containing drum as a drying chamber.
  • the hot air absorbs moisture from the laundry to be dried.
  • the now moist process air is directed into a heat exchanger, which is usually preceded by a lint filter.
  • the moist process air is cooled, so that the water contained in the moist process air condenses.
  • the condensed water is then collected in a suitable container.
  • the cooled and dried air is then returned to the heater and then to the drum.
  • the heat exchanger can be easily removed for occasional cleaning of dried lint (microfibers of the laundry).
  • a condensation dryer with a closed process air circuit is described, which is equipped with a heat pump.
  • the heat pump is designed as a device operating according to the absorber principle whose absorber forms a third heat exchanger whose coolant flows through the primary circuit and via whose secondary circuit the process air flowing from the second heat exchanger is returned to the secondary circuit of the first heat exchanger.
  • An object of the invention is therefore to provide a condensation dryer with a heat pump, which has an increased life and offers the possibility for easier cleaning.
  • Preferred embodiments of the condensation dryer according to the invention are listed in the subclaims 2 to 8.
  • a preferred embodiment of the method according to the invention is listed in claim 10.
  • the invention thus relates to a condensation dryer with a drying chamber for objects to be dried, a process air circuit in which the process air can be guided by means of a blower on the objects to be dried, and a heat pump circuit for alternately heating and cooling the process air, in which condensation dryer between at least one secondary fluid circuit is located in the process air circuit and the heat pump circuit.
  • the invention also provides a method for operating a condensation dryer with a drying chamber for objects to be dried, a process air circuit in which the process air is guided by means of a blower over the objects to be dried and thereby alternately heated and cooled by a heat pump cycle, wherein between the process air circuit and the heat pump circuit is at least one secondary fluid circuit through which heat is exchanged between the heat pump circuit and the process air.
  • the secondary fluid circuit contains a secondary refrigerant which is a substance which is liquid at room temperature and normal pressure.
  • the secondary refrigerant in a secondary fluid circuit at least one substance from the group consisting of water, single and multiple alcohols and glycol ethers.
  • Suitable polyhydric alcohols are, for example, ethylene glycol and propylene glycol.
  • Suitable glycol ethers are, for example, ethylene glycol dimethyl ether and propylene glycol dimethyl ether or the corresponding monoether.
  • water is used as the secondary refrigerant.
  • the heat pump preferably has an evaporator, a condenser, a compressor and a throttle.
  • the compressor is generally in the flow direction of the primary refrigerant between the evaporator and the condenser.
  • an expansion valve also referred to as throttle.
  • the primary refrigerant used in the heat pump preferably circulates in the heat pump cycle with a turbulent flow. Turbulent flow may be adjusted by suitable design of a flow channel and / or by suitable drive means (e.g., compressor).
  • the condensation dryer according to the invention contains at least one secondary fluid circuit between the heat pump and the process air circuit.
  • one or two secondary fluid circuits are located between the heat pump and the process air circuit.
  • the condensation dryer according to the invention has a first secondary fluid circuit and a second secondary fluid circuit.
  • a secondary refrigerant which is generally different from the primary refrigerant, circulates.
  • the heat pump thus gives its cooling power or heating power via a secondary refrigerant (also called “secondary fluid") in at least one secondary fluid circuit to the process air circuit of the Condensation dryer off.
  • secondary refrigerant also called "secondary fluid”
  • the cooling or heating power is generated centrally in a heat pump, which can be very compact in the condensation dryer according to the invention.
  • the warm, moisture-laden process air is cooled in a first heat exchanger in which the process air circuit and the first secondary fluid circuit contact via a good heat-conducting wall ,
  • the moisture contained in the process air condenses and is generally collected in a suitable receptacle, e.g. a bowl, collected from where it is disposed of.
  • the dried, cooled process air is heated in a second heat exchanger in which the process air circuit and the second secondary fluid circuit contact via a wall which is as heat-conductive as possible .
  • the heated process air is then in turn supplied to the laundry drum as a drying chamber.
  • the process air can be additionally heated by an electric heater.
  • the secondary refrigerant (“secondary fluid”) is most preferably water. Since this can be done almost pressure-free relative to the ambient pressure, the flowed through by the process air heat exchanger between the heat pump and the process air circuit, for example via quick-release closures (as used similarly as articles for garden irrigation) are connected to the heat pump.
  • the secondary refrigerant used in the secondary fluid circuit preferably water, is generally supplied via an external inlet (water inlet).
  • the condensation water obtained during the drying process is at least partly used as a secondary refrigerant.
  • the temperature of the secondary refrigerant and the temperature of the primary refrigerant are generally kept within the allowable range by the control of the heat pump. If, in the condensation dryer according to the invention in the process air circuit before the entry into the drying chamber is preferably a heating, generally takes place the control of the heat pump in coordination with the control of the heater.
  • the condensation dryer according to the invention has a first secondary fluid circuit and a second secondary fluid circuit, so that both heat exchangers of the heat pump are each connected to the process air circuit via a secondary fluid circuit.
  • the condensation dryer according to the invention has at least one removable heat exchanger.
  • the removable heat exchanger may be the first and / or the second heat exchanger.
  • the first heat exchanger is preferably removable, since it tends more to contamination with lint.
  • two secondary fluid circuits are located between the process air circuit and the heat pump circuit, and heat is exchanged between these between the heat pump circuit and the process air.
  • the heat exchange between the heat pump circuit and the first and second secondary fluid circuit is particularly efficient when the refrigerant is moving in turbulent flow.
  • the primary refrigerant in the heat pump circuit is turbulent.
  • a turbulent flow can also be set in the secondary fluid circuit and / or in the process air circuit instead of a laminar one.
  • the secondary fluid lines are thermally insulated except for the line sections located in the respective heat exchanger.
  • process air and primary or secondary refrigerant are passed through the heat exchangers in a cross-flow or countercurrent process.
  • the degree of drying of the objects to be dried in the condenser dryer decreases the energy required for drying, it is appropriate to regulate the heating accordingly, that is. As the degree of dryness progresses, their heating power is reduced to maintain a balance between the supplied and necessary drying energy. With increasing degree of drying of the objects to be dried, in particular laundry, thus a lower heating power or even an increasing cooling capacity of the heat pump is required. In particular, after a completed drying phase, the temperature in the process air circuit would rise sharply. In general, therefore, the heat pump and the heater in the condensation dryer are controlled so that a maximum allowable temperature is not exceeded in the drying chamber.
  • the invention has numerous advantages.
  • the long-term stability of condensation laundry dryers with a heat pump is improved due to the use of secondary fluid circuits.
  • a coefficient of performance of the heat pump cycle increases, with a slight reduction in the coefficient of performance due to the at least one secondary circuit (increase in the number of heat transfers) being more than offset by the elimination of the problems with contaminated heat exchangers.
  • the heat exchanger through which the process air flows can be very easily disassembled and cleaned. As a result, the performance of the heat exchanger is maintained.
  • the heat pump unit can be very compact, in particular from compressor, evaporator, throttle and condenser prefabricated. After installation, only the secondary fluid lines need to be connected. This makes it much easier and automated to produce the heat pump unit. This reduces the cost of the manufacturing process and enables a higher, easier-to-control manufacturing quality.
  • the placement of the heat exchangers for the process air is when using very low boiling refrigerants such. Carbon dioxide is no longer bound to narrow limits by the high-pressure lines of the refrigerant circuit.
  • the secondary fluid may also dissipate the waste heat of the compressor of the heat pump to the process air of the clothes dryer. This increases the overall efficiency of the heat pump process and thus the energy balance of the entire drying process.
  • condensation dryer of FIG. 1 the heat pump is connected to the process air circuit via two secondary fluid circuits.
  • FIG. 1 shows a vertically cut condensation dryer 1 (hereinafter abbreviated to "dryer” 1).
  • the in FIG. 1 shown dryer 1 has a drum 3 rotatable about a horizontal axis as a drying chamber 3, are mounted within which driver 4 for moving laundry during a drum rotation.
  • a heater 18, a first heat exchanger 11, 12, 13, a heat pump 13, 14, 15, 23, a second heat exchanger 16, 17 and a fan 19 are provided to a closed by an air duct 2 process air circuit 2 through the drum 3 through produce, after passing through the drum 3 to cool and reheat after condensation of moisture contained in the process air.
  • the heater 18 is optional; Above all, it is provided in order to be able to bring the components of the condensation dryer 1 and the objects to be dried as quickly as possible to the elevated temperatures required for drying during commissioning. In stationary operation of the condensation dryer 1, the use of the heater 18 may no longer be required.
  • the transmission of the cooling power of the heat pump 13, 14, 15, 23 in this case takes place via the circulating in a first secondary fluid circuit 12, 20 secondary refrigerant, preferably water.
  • a first secondary fluid circuit 12, 20 secondary refrigerant preferably water.
  • the process air is passed from the blower 19 in turn to the heater 18.
  • the heat is transferred via a second secondary fluid circuit 16, 21.
  • the drum 3 is in the in Fig. 1 shown embodiment at the rear bottom by means of a pivot bearing and front mounted by means of a bearing plate 7, wherein the drum 3 rests with a brim on a sliding strip 8 on the bearing plate 7 and is held at the front end.
  • control of the condensation dryer via a control device 10, which can be controlled by the user via an operating unit 9; the controller engages in a suitable, not to be described in detail manner on all controllable components, including in particular not shown here, conventional sensors, the dryer 1 to.
  • the heated secondary refrigerant of the first secondary fluid circuit 12, 20 is cooled in the evaporator 13 of the heat pump 13, 14, 15, 23.
  • a primary refrigerant is evaporated in the evaporator 13, compressed in the compressor 14 and then condensed in the condenser 15 of the heat pump.
  • the heat released in this process is used to heat the process air passed through the second heat exchanger 16, 17 via a second secondary circuit 16, 21.
  • the refrigerant passes through a throttle 23 back to the evaporator 14.
  • the waste heat of the heat pump circuit 13, 14, 15, in particular of the compressor 14, which is generally operated electrically, the process air are supplied (in FIG. 1 dashed lines drawn).

Claims (10)

  1. Séchoir à condensation (1) avec une chambre de séchage (3) pour des objets à sécher, un circuit d'air de processus (2), dans lequel l'air de processus peut être mené sur les objets à sécher au moyen d'une soufflerie (19), et un circuit de pompe à chaleur (13, 14, 15, 23) pour le chauffage et le refroidissement alternatif de l'air de processus, caractérisé en ce qu'au moins un circuit de fluide secondaire (12, 20 resp. 16, 21) se trouve entre le circuit d'air de processus (2) et le circuit de pompe à chaleur (13, 14, 15, 23), au travers duquel de la chaleur peut être échangée entre le circuit de pompe à chaleur (13, 14, 15, 23) et l'air de processus.
  2. Séchoir à condensation (1) selon la revendication 1, dans lequel le circuit de fluide secondaire (12, 20 resp. 16, 21) contient un agent frigorifique secondaire liquide à température ambiante et à pression normale.
  3. Séchoir à condensation (1) selon la revendication 2, dans lequel l'agent frigorifique secondaire dans un circuit de fluide secondaire (12, 20 resp. 16, 21) est au moins une substance issue du groupe composé par l'eau, les alcools simples et complexes et les éthers de glycols.
  4. Séchoir à condensation (1) selon la revendication 3, dans lequel l'agent frigorifique secondaire est de l'eau.
  5. Séchoir à condensation (1) selon l'une des revendications 1 à 4, dans lequel le circuit de pompe à chaleur (13, 14, 15, 23) contient un agent frigorifique primaire, lequel est choisi parmi le groupe composé par le propane, l'isobutane, le dioxyde de carbone et les composés hydrofluorocarbone.
  6. Séchoir à condensation (1) selon la revendication 5, dans lequel le circuit de pompe à chaleur (13, 14, 15, 23) présente un évaporateur (13), un compresseur (14), un condenseur (15) et un restricteur (23).
  7. Séchoir à condensation (1) selon l'une des revendications 1 à 6, lequel dispose d'un premier circuit de fluide secondaire (12, 20) et d'un second circuit de fluide secondaire (16, 21).
  8. Séchoir à condensation selon l'une des revendications 1 à 7, lequel présente au moins un premier échangeur de chaleur (16, 17) ou un second échangeur de chaleur (11, 12) amovible.
  9. Procédé d'exploitation d'un séchoir à condensation (1) avec une chambre de séchage (3) pour des objets à sécher, un circuit d'air de processus (2), dans lequel l'air de processus est mené sur des objets à sécher au moyen d'une soufflerie (19), et est alternativement chauffé et refroidi par un circuit de pompe à chaleur (13, 14, 15, 23), caractérisé en ce qu'au moins un circuit de fluide secondaire (12,20 resp. 16, 21) se trouve entre le circuit d'air de processus (2) et le circuit de pompe à chaleur (13, 14, 15, 23), au travers duquel de la chaleur est échangée entre le circuit de pompe à chaleur (13, 14, 15, 23) et l'air de processus.
  10. Procédé selon la revendication 9, dans lequel deux circuits de fluide secondaire (12, 20 resp. 16, 21) se trouvent entre le circuit d'air de processus (2) et le circuit de pompe à chaleur (13, 14, 15, 23), via lesquels de la chaleur est échangée entre le circuit de pompe à chaleur (13, 14, 15, 23) et l'air de processus.
EP07857754A 2006-12-28 2007-12-18 Séchoir à condensation comprenant une pompe à chaleur ainsi que procédé de fonctionnement Active EP2122039B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006061737A DE102006061737B3 (de) 2006-12-28 2006-12-28 Kondensationstrockner mit einer Wärmepumpe sowie Verfahren zu seinem Betrieb
PCT/EP2007/064127 WO2008080831A1 (fr) 2006-12-28 2007-12-18 Séchoir à condensation comprenant une pompe à chaleur ainsi que procédé de fonctionnement

Publications (2)

Publication Number Publication Date
EP2122039A1 EP2122039A1 (fr) 2009-11-25
EP2122039B1 true EP2122039B1 (fr) 2010-07-21

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EP07857754A Active EP2122039B1 (fr) 2006-12-28 2007-12-18 Séchoir à condensation comprenant une pompe à chaleur ainsi que procédé de fonctionnement

Country Status (8)

Country Link
US (1) US8266824B2 (fr)
EP (1) EP2122039B1 (fr)
KR (1) KR101375511B1 (fr)
CN (1) CN101573487B (fr)
AT (1) ATE474955T1 (fr)
DE (2) DE102006061737B3 (fr)
EA (1) EA014949B1 (fr)
WO (1) WO2008080831A1 (fr)

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US10738411B2 (en) 2016-10-14 2020-08-11 Whirlpool Corporation Filterless air-handling system for a heat pump laundry appliance
US10502478B2 (en) 2016-12-20 2019-12-10 Whirlpool Corporation Heat rejection system for a condenser of a refrigerant loop within an appliance
CN107014198B (zh) * 2016-12-29 2019-08-09 石曾矿 可调温的四效除湿干燥系统
US10544539B2 (en) 2017-02-27 2020-01-28 Whirlpool Corporation Heat exchanger filter for self lint cleaning system in dryer appliance
US10514194B2 (en) 2017-06-01 2019-12-24 Whirlpool Corporation Multi-evaporator appliance having a multi-directional valve for delivering refrigerant to the evaporators
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Also Published As

Publication number Publication date
WO2008080831A1 (fr) 2008-07-10
EA014949B1 (ru) 2011-04-29
CN101573487A (zh) 2009-11-04
CN101573487B (zh) 2012-01-04
EA200970634A1 (ru) 2010-02-26
DE502007004523D1 (de) 2010-09-02
US8266824B2 (en) 2012-09-18
ATE474955T1 (de) 2010-08-15
EP2122039A1 (fr) 2009-11-25
DE102006061737B3 (de) 2008-04-24
US20100011615A1 (en) 2010-01-21
KR101375511B1 (ko) 2014-03-18
KR20090096612A (ko) 2009-09-11

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