EP1966426A1 - Appareil electromenager comprenant une pompe a chaleur thermoelectrique - Google Patents

Appareil electromenager comprenant une pompe a chaleur thermoelectrique

Info

Publication number
EP1966426A1
EP1966426A1 EP06819825A EP06819825A EP1966426A1 EP 1966426 A1 EP1966426 A1 EP 1966426A1 EP 06819825 A EP06819825 A EP 06819825A EP 06819825 A EP06819825 A EP 06819825A EP 1966426 A1 EP1966426 A1 EP 1966426A1
Authority
EP
European Patent Office
Prior art keywords
heat
peltier elements
domestic appliance
flow path
power
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.)
Granted
Application number
EP06819825A
Other languages
German (de)
English (en)
Other versions
EP1966426B1 (fr
Inventor
Hasan Gökcer ALBAYRAK
Klaus Grunert
Günter Steffens
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 Bosch und Siemens 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 Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP1966426A1 publication Critical patent/EP1966426A1/fr
Application granted granted Critical
Publication of EP1966426B1 publication Critical patent/EP1966426B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—Heat pump arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/06—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for evacuating by thermal means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B21/00—Machines, plants or systems, using electric or magnetic effects
    • F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect

Definitions

  • the invention relates to a domestic appliance with a thermoelectric heat pump, which comprises at least one operable with a constant terminal voltage series arrangement of Peltier elements whose resistance increases with increasing temperature, and in which a limit temperature for the Peltier elements is predetermined.
  • Peltier element in structure and function which has the structure described above ,
  • the half elements of this Peltier element are formed in columns or cuboid and consist of doped semiconductors as materials.
  • the semiconductors are, in particular, bismuth telluride, and a p-type doped semiconductor and an n-type doped semiconductor are used.
  • a half element of the p-type doped semiconductor and a half element of the n-type doped semiconductor are each connected to one side via a printed circuit board, also referred to as a metal bridge, and at another side, which is opposite to said one side , Connected via a respective further circuit board with another half-element or a connection contact for connection of the Peltier element to an electrical network.
  • a printed circuit board also referred to as a metal bridge
  • DE 1 410 206 A discloses a domestic appliance in the form of a washing machine, in which laundry can not only be washed, but also dried.
  • the document shows several alternatives;
  • the heat pump may be a heat pump that uses Peltier elements to utilize the thermoelectric effect; In this case, the heat pump is referred to as a "thermoelectric heat pump".
  • a domestic appliance for drying laundry which emerges from an English summary extract belonging to the patent abstract "Patent Abstracts of Japan" for JP 08 057 194 A, contains, in addition to a heater and a radiator, both of which belong to a thermoelectric heat pump, a radiator upstream of a duct system additional heat exchanger for cooling the discharged air stream from the laundry and an additional heating device downstream of the heater for further heating of the air flow before the loading of the laundry.
  • a domestic appliance in the form of a tumble dryer with a thermoelectric heat pump is known from DE 69 26 182 U.
  • the resistance increases with increasing temperature in all Peltier elements.
  • a temperature limit is specified by using a solder that can melt.
  • a threshold temperature for Peltier elements is 150 ° C.
  • the problem is such a structure when it comes to a disturbance in the operation of the domestic appliance, for example, a failure of a fan blower, excessive drying of the laundry or excessive loading of the airways with lint. If unsuitable safety measures are taken in such a case, the heat pump may be destroyed by overheating. Such overheating can damage a solder joint in a Peltier element and impair its electrical contact; It is also possible for a metal to diffuse out of an overheated solder joint into a semiconductor material of the Peltier element and to adversely affect its function.
  • the Peltier elements of the thermoelectric heat pump are heated above their normal operating temperature, which is generally between 60 ° C and 100 ° C. It may easily be possible that their limit temperature is exceeded, which can lead to the failure of the modules and beyond a certain risk of fire.
  • heat can be dissipated from each Peltier element via a heat flow path.
  • This is a separate heat flow path, which is different from the usual heat dissipation in the heating of the air at the hot side of the thermoelectric heat pump.
  • the heat flow path is designed so that as the temperature rises, before reaching the threshold temperature, the power of the heat dissipated becomes equal to the electrical power that draws the Peltier elements from the constant supply voltage.
  • the invention is based on the recognition that the Peltier elements just do not need to be protected by thermal insulation, but that on the contrary a heat flow path must be provided, which dissipates heat from them.
  • This Heat flow with the power Pt h e rm is different from the heat flow at the warm side of the heat pump. It transports the heat that flows through structural components of the heat pump and adjacent components of the tumble dryer. This heat flow is made available in the present case in order to achieve complete operational reliability of the heat pump. According to the invention, this maximum temperature is less than the limit temperature which the Peltier elements are allowed to reach a maximum.
  • thermoelectric heat pump is intrinsically safe, ie there are no additional safety measures required to prevent exceeding the limit temperature.
  • the connected load and the resistance of the Peltier elements on the one hand are in a balanced relationship to the power Ptherm power dissipated via the additional heat flow path.
  • the electrical power drawn decreases with increasing temperature.
  • the heat output to be dissipated in an emergency is less than the electrical power consumed during regular operation.
  • the invention gives a clear prescription on how, on the one hand, the heat flow path is to be dimensioned and, on the other hand, how the electric power of the Peltier elements is to be faced.
  • the electrical power of the Peltier elements to be drawn can also be changed in order to satisfy the conditions according to the invention. For example, the number of Peltier elements can be increased in order to increase the resistance of the Peltier elements and thus to lower the drawn power in order to fulfill the inventive condition for a given heat flow path.
  • the electrical power of the heat pump is in regular operation preferably between 800 W and 1500 W, in particular at 1000 W, at an operating temperature of
  • Heat pump between 60 ° C and 100 ° C, especially at 90 ° C.
  • the resistance increases in an emergency by the slope of the temperature, so that the electric power at a no longer passable temperature, which is preferably between 120 ° C and 150 ° C, in particular at 120 ° C, is only about half.
  • the power of the dissipated heat at the temperature at which it becomes equal to the drawn electric power is 450 W to 700 W, preferably 600 W.
  • the domestic appliance has at least one additional heat cover in addition to the heat flow path, wherein furthermore preferably the heat flow path and this at least one additional heat cover are designed for discharging
  • the tumble dryer 1 comprises a laundry drum 10, from which air can be discharged via an air outlet opening 12, and into which air can be introduced via an air inlet opening 14. From the air outlet opening 12, the air enters the tube 16, wherein it is sucked by means of a blower 18. The air is guided in the tube 16 and via the tube 22 to an array of Peltier elements 20.
  • the Peltier elements 20 (shown here as square blocks) are arranged in a row. A terminal voltage, which supplies the electrical power P e i, is due to the Peltier elements at the 20th Of the Peltier elements 20, the air passes through the tube 24 via the blower 18 through the air inlet opening 14 into the drum 10 back.
  • the sucked into the pipe 16 air is loaded by located in the laundry drum 10 laundry (not shown) with moisture.
  • This moisture condenses on a cold side 26 of the Peltier elements 20, which cold side 26 is formed from a thermally coupled to the Peltier elements 20 and in particular ribbed heat exchanger 26.
  • the condensed moisture is collected over a known and presently not shown for clarity device and removed from the circulation of the air.
  • From the cold side 26, the air passes to a hot side 28 of the Peltier elements 20, which hot side 28 is also formed from a thermally coupled to the Peltier elements 20 and in particular ribbed heat exchanger 28. There, the air is reheated and thus finally returns via the air inlet opening 14 in the laundry drum 10.
  • the Peltier elements 20 form, with the cold side 26 and the hot side 28, a heat pump 20, 26, 28 in the tumble dryer 1.
  • a voltage source 30 provides the electrical voltage for operating the Peltier elements 20 to which it is connected via leads 32.
  • the system of the tubes 16, 22 and 24 may be prone to failure, in particular fluff from the laundry on the inside of the tube can adhere firmly and clog a pipe at least partially. Therefore, in a real laundry dryer 1 is always a sieve for
  • a disturbance can also be caused by a faulty, possibly completely precipitating fan 18 or excessive loading of the heat exchanger 26 and 28.
  • the laundry drum 10 does not contain any laundry, or that the laundry has already dried very quickly. In all these cases, the air entering the pipe 16 is not affected by moisture, so that there is no condensation on the cold side 26. The air continues to heat up, which eventually increases the temperature of the Peltier elements 20.
  • a heat flow path 34 leads away a heat flow with a power P therm to be subsequently specified from the individual Peltier elements 20.
  • Heat flow with the power Pt h e rm is different from the heat flow on the hot side 28. It transports the heat that comes through structural components of the
  • Heat pump 20, 26, 28 and adjacent components of the clothes dryer 1 drains. This heat flow is made available here to a complete
  • the resistance of the Peltier elements 20 increases.
  • the electrical power P e ⁇ absorbed by them decreases.
  • the power of the dissipated heat P th e rm increases due to the increasing temperature difference between the components of the heat pump 20, 26, 28 and the vicinity of the clothes dryer 1 into which the dissipated heat ultimately flows. Assuming that the temperature of the Peltier elements 20 still remains deep enough to maintain their structural and functional integrity, it comes at a certain temperature, the maximum temperature, the tie between Ptherm and P e ⁇ .
  • this maximum temperature is less than the limit temperature, which may reach the Peltier elements 20 maximum. If P therm equals P e ⁇ , supply and removal of heat in the totality of the Peltier elements 20 balance out, and the maximum temperature at which the two powers P e ⁇ and Pt h e rm are in equilibrium can no longer be crossed, be exceeded, be passed.
  • the thermoelectric heat pump 20, 26, 28 intrinsically safe ie there are no additional security measures required to prevent exceeding the limit temperature.
  • the connected load and the resistance of the Peltier elements 20 on the one hand (wherein the resistance may be determined by the number of Peltier elements 20) are in a balanced relationship to the power Ptherm power dissipated via the additional heat flow path 34.
  • the tumble dryer 1 can operate in a stationary operation, wherein the Peltier elements 20 assume their intended and interpretation according to operating temperature between 60 ° C and 100 ° C, in particular at about 90 ° C, the supply of heat to the tumble dryer 1 can be compensated by the removal of heat from the tumble dryer 1. Accordingly, a removal of all heat is provided, which arises in the Peltier elements 20 in regular operation.
  • the heat flow path 34 does not do this alone, but there are more heat leaks available. These heat leaks include - not least because of the inevitable losses occurring - the tubes 16, 22 and 24 and the drum 10.
  • the heat flow path 34 and the additional heat leaks are designed to dissipate heat at a power that is at least equal to the power that the Peltier elements 20 pull at the operating temperature. It is possible to measure the electrical resistance of the arrangement of Peltier elements 20, which here acts as a self-controlled variable, in order to obtain information about the presence of abnormal states. It would be necessary for this purpose to install a (not shown) resistance meter in the Peltier elements 20 dining circuit. Accordingly, the clothes dryer 1 can be turned off early, before the abnormal condition has an adverse effect.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Abstract

L'invention concerne un appareil électroménager (1), en particulier un sèche-linge (1), comprenant une pompe à chaleur (20, 26, 28) thermoélectrique. L'objectif de l'invention est d'empêcher les éléments Peltier (20) situés dans la pompe à chaleur (20, 26, 28) thermoélectrique de dépasser une température seuil prédéterminée en toute circonstance. La résistance des éléments Peltier (20) augmente avec l'augmentation de la température, alors que l'énergie électrique à tension de secteur constante diminue. Un passage d'écoulement (34) séparé, pour la chaleur, est conçu de manière à ce que lors de l'augmentation de la chaleur, l'énergie (P<SUB>therm</SUB>) thermique transportée est équivalente à l'énergie électrique (P<SUB>el</SUB>) transportée par les éléments Peltier (20) à partir de la tension de secteur constante.
EP06819825A 2005-12-16 2006-11-29 Appareil electromenager comprenant une pompe a chaleur thermoelectrique Not-in-force EP1966426B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005060355A DE102005060355A1 (de) 2005-12-16 2005-12-16 Hausgerät mit thermoelektrischer Wärmepumpe
PCT/EP2006/069037 WO2007068588A1 (fr) 2005-12-16 2006-11-29 Appareil electromenager comprenant une pompe a chaleur thermoelectrique

Publications (2)

Publication Number Publication Date
EP1966426A1 true EP1966426A1 (fr) 2008-09-10
EP1966426B1 EP1966426B1 (fr) 2009-07-15

Family

ID=37708159

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06819825A Not-in-force EP1966426B1 (fr) 2005-12-16 2006-11-29 Appareil electromenager comprenant une pompe a chaleur thermoelectrique

Country Status (5)

Country Link
US (1) US9322126B2 (fr)
EP (1) EP1966426B1 (fr)
KR (1) KR101306420B1 (fr)
DE (2) DE102005060355A1 (fr)
WO (1) WO2007068588A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005060040A1 (de) * 2005-12-15 2007-06-21 BSH Bosch und Siemens Hausgeräte GmbH Schaltungsanordnung für ein Peltiermodul
DE202009005871U1 (de) 2009-04-21 2010-09-16 Autokühler GmbH & Co. KG Thermoelektrische Wärmepumpe und damit hergestelltes Hausgerät zur Pflege von Wäschestücken
US8365539B2 (en) 2010-02-12 2013-02-05 Massachusetts Institute Of Technology System and method for thermal process including a thermoelectric heat pump and internal heat exchanger
EP2372012B1 (fr) * 2010-03-30 2016-08-31 DBK David + Baader GmbH Unité de condensateur, appareil domestique, et procédé de contrôle de cet appareil domestique
GB2484486A (en) * 2010-10-12 2012-04-18 Oclaro Technology Ltd Component Temperature Control
US9700835B2 (en) * 2011-01-06 2017-07-11 Spx Flow Technology Usa, Inc. Thermoelectric compressed air and/or inert gas dryer
PL2578741T3 (pl) * 2011-10-04 2017-08-31 Dbk David + Baader Gmbh Termoelektryczna pompa ciepła, wymiennik ciepła, urządzenie gospodarstwa domowego oraz sposób działania urządzenia gospodarstwa domowego
CN103485141B (zh) * 2013-06-14 2016-01-13 无锡小天鹅股份有限公司 干衣机
DE102014223569A1 (de) * 2014-11-19 2016-05-19 BSH Hausgeräte GmbH Wäschetrocknungsgerät und Verfahren zum Betreiben eines Wäschetrocknungsgeräts
IT201700020866A1 (it) * 2017-02-23 2018-08-23 Chiriatti Antonio Francesco Asciugatrice per lana e tessuti delicati
US11604027B2 (en) 2018-06-21 2023-03-14 Cfa Properties, Inc. Modular humidity control and heat preservation system
US11918153B2 (en) * 2018-06-21 2024-03-05 Cfa Properties, Inc. Food transportation and humidity control elements
US12011022B2 (en) 2018-06-21 2024-06-18 Cfa Properties, Inc. Food transportation and humidity control elements
CN111550418A (zh) * 2020-05-15 2020-08-18 杭州余杭特种风机有限公司 一种低噪音高效率离心式鼓风机

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Also Published As

Publication number Publication date
US9322126B2 (en) 2016-04-26
KR101306420B1 (ko) 2013-09-09
KR20080075874A (ko) 2008-08-19
WO2007068588A1 (fr) 2007-06-21
EP1966426B1 (fr) 2009-07-15
US20090049843A1 (en) 2009-02-26
DE102005060355A1 (de) 2007-06-21
DE502006004264D1 (de) 2009-08-27

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