EP3245327A1 - Condenser dryer with improved drying capability, and method for operating same - Google Patents
Condenser dryer with improved drying capability, and method for operating sameInfo
- Publication number
- EP3245327A1 EP3245327A1 EP15810655.9A EP15810655A EP3245327A1 EP 3245327 A1 EP3245327 A1 EP 3245327A1 EP 15810655 A EP15810655 A EP 15810655A EP 3245327 A1 EP3245327 A1 EP 3245327A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- process air
- actuator system
- throttle valve
- air
- drive medium
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 174
- 238000001035 drying Methods 0.000 title claims abstract description 33
- 230000008569 process Effects 0.000 claims abstract description 156
- 238000001816 cooling Methods 0.000 claims abstract description 89
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000009833 condensation Methods 0.000 claims description 56
- 230000005494 condensation Effects 0.000 claims description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 5
- 230000001419 dependent effect Effects 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 230000009972 noncorrosive effect Effects 0.000 claims description 2
- 230000002123 temporal effect Effects 0.000 claims 1
- 230000007246 mechanism Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- XIUFWXXRTPHHDQ-UHFFFAOYSA-N prop-1-ene;1,1,2,2-tetrafluoroethene Chemical group CC=C.FC(F)=C(F)F XIUFWXXRTPHHDQ-UHFFFAOYSA-N 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- D06F58/24—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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/02—Characteristics of laundry or load
- D06F2103/08—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
- D06F2103/36—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
- D06F2105/32—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
- D06F2105/46—Drum speed; Actuation of motors, e.g. starting or interrupting
-
- 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
-
- 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
Definitions
- the invention relates to a condensation dryer with a drying chamber for items to be dried, a control device, a drive motor, a process air duct in which a process air blower for conveying the process air and a heater for heating the process air are arranged, an air-air heat exchanger with a cooling air duct, in which a cooling air blower and a throttle valve is arranged, and an actuator system.
- the invention also relates to a method for its operation.
- tumble dryers can be divided into two classes based on their mode of operation, exhaust air dryers and condensation dryers.
- the principle of a condensation dryer is based on the condensation of moisture vaporized by means of warm process air from laundry items.
- process air used for drying moves in a largely closed circuit.
- the initially cool process air is generally passed through a fan initially via a heater. Behind the heater enters the dry and hot process air into the drum as a drying chamber, which contains the wet laundry to be dried. In the drum, the hot process air absorbs the moisture from the laundry.
- the then moist and still warm process air is passed from the drum to a heat exchanger for dehumidification.
- an air-air heat exchanger or a heat sink (in particular refrigerant evaporator) of a heat pump is generally used.
- the moist process air is cooled therein so that the water contained in it condenses, and the cooled dried process air is again supplied to the heating and then back to the drum.
- an air-to-air heat exchanger is generally used for the condensation of the water contained in the moist-warm process air.
- the cooling is done here by indoor air, which is usually performed by a blower through an open cooling air passage through the heat exchanger.
- indoor air which is usually performed by a blower through an open cooling air passage through the heat exchanger.
- the temperature of the process air still low, so that hardly any moisture is absorbed by the process air from the wet laundry items and condensation hardly takes place in the heat exchanger.
- the process air is already strongly cooled by the cooling air flow in this phase, whereby energy is unnecessarily extracted, which prolongs the heating phase and increases the energy consumption of the drying process.
- a heat pump dryer is very energy efficient.
- a heat pump dryer is too expensive for many users. It is therefore desirable to optimize a conventional condensation dryer in a cost-effective manner in order to be able to provide a device with good energy efficiency for each user.
- DE 10 2006 003 817 A1 describes a dryer with a drum for receiving a material to be treated, a process air duct in which a heater for heating a process air flow and the heated process air flow by means of a first blower to the estate can be performed, wherein in the process air duct, a controllable first throttle for reducing a speed of the process air flow is mounted.
- the process air duct and an open cooling air duct intersect in a condenser, wherein cooling air can be introduced from the room air into the cooling air duct by means of a second blower and led out after flowing through the condenser, and in the cooling air duct a controllable second throttle for reducing the speed of the cooling air flow located.
- DE 10 2010 031 268 A1 describes a laundry drying apparatus having an air supply duct leading from the outside to a laundry treatment room and an air discharge duct leading outward from the laundry treatment room, at least one first closure element being present in the air supply duct and at least one second closure element being present in the air discharge duct and the closure elements are adapted to proceed with an interruption of a drying operation from an open position to a closed position.
- DE 10 201 1 081 940 A1 describes a dryer comprising a control device and a process air duct in which a heater, a drying chamber for objects to be dried, a fan and a cross-flow heat exchanger are arranged.
- the process air duct comprises a supply air duct in front of the drying chamber and an exhaust duct between the drying chamber and crossflow heat exchanger, wherein the exhaust duct and / or the cross-flow heat exchanger is / are such that a larger part p * M of a process air amount M, which flows through the exhaust duct into the cross-flow heat exchanger , Where p> 0.5, is passed to a cooling flow inlet side of the cross-flow heat exchanger.
- DE 102 02 442 B4 discloses a floor module for a condensation dryer, wherein the front cooling air outlet has at least one inclined flow guide, which avoids mixing of the exiting cooling air flow with the sucked on the air inlet section cooling air flow.
- the invention thus relates to a condensation dryer (hereinafter also referred to as "dryer”) with a drying chamber for laundry items to be dried, a control device, a drive motor, a process air duct in which a process air blower for conveying the process air and a heater for heating the process air arranged are, an air-to-air heat exchanger with a cooling air duct, in which a cooling air blower and a throttle valve are arranged, and an actuator system, wherein the actuator system includes a hydraulic cylinder, a reciprocating piston and a drive medium, and wherein the actuator system via the reciprocating piston is frictionally connected to the throttle valve and is in thermal contact with the process air duct, so that an adjustment of the throttle valve in dependence on a temperature T of the process air can be made.
- thermal contact generally means that heat transfer between the process air and the actuator system is possible directly or indirectly, although the condensation dryer and, in particular, the arrangement of the process air duct and actuator system will generally be designed such that the most efficient possible heat exchange In general, then, the actuator system can be particularly sensitive to changes in the temperature of the process air
- the thermal contact between the actuator system and process air duct is a heat exchange between warm process air in the process air duct and the drive medium
- a single-acting hydraulic cylinder is used linderêt, a cylinder jacket and a cylinder cover plate whose shape and design according to the invention are not further limited.
- a round bottom cylin- the used In one embodiment, a round bottom cylin- the used.
- the material of which the hydraulic cylinder is made according to the invention is also not limited.
- a non-corroding metal is used, more preferably the hydraulic cylinder is made of stainless steel.
- a reciprocating piston is arranged in the hydraulic cylinder.
- the reciprocating piston generally consists of at least one piston head and one piston pin.
- the term “piston head” herein means a component adapted to the cylinder cross-section which closes tightly with the cylinder jacket, but permits movement of the piston in the hydraulic cylinder
- the term “piston pin” here means a rod-shaped component which is firmly connected to the piston crown.
- the reciprocating piston additionally has a piston skirt.
- the term "piston skirt" means a cylindrical member which is recessed into the top plate of the hydraulic cylinder and guides the movement of the piston pin
- the piston head is in contact with a drive medium, in which way a change in state of the drive medium, for example a change in volume, can be utilized
- the actuator system is connected to a throttle valve, thereby allowing the actuator system to adjust the opening angle of the throttle valve Orm the adjustment mechanism of the throttle valve connected to the Hubkolbenbolzen.
- connection is a mechanical connection with linear power transmission, such as a linkage, and / or a connection with non-linear power transmission, such as a crank handle or a ball joint, which can be connected to a linkage.
- connection is preferably designed so that the throttle valve can be opened by a drive of the reciprocating piston and / or can be closed by a return movement of the reciprocating piston.
- the frictional connection between the throttle and the actuator system is thus a connection with linear or non-linear power transmission.
- linear force transmission means, in particular, that a movement of the reciprocating piston due to a change in volume of the drive medium causes a proportional change in the position of the throttle, in particular an opening of the throttle or of the cooling air passage that can be regulated by it. that a movement of the lifting piston due to a change in volume of the drive medium causes a non-proportional change of the position of the throttle.
- a condensation dryer is preferred in which the actuator system additionally has a reservoir for the drive medium connected to the hydraulic cylinder.
- the reservoir is at least partially made of a plastic and / or a non-corrosive metal.
- the configuration of the reservoir according to the invention is not further limited.
- the reservoir may for example be made of a plastic such as polyvinyl chloride (PVC), polytetrafluoroethylene (PTFE), perfluoroethylene propylene (FEP), polyethylene (PE), a thermoplastic or an elastomer and / or also of a metal.
- PVC polyvinyl chloride
- PTFE polytetrafluoroethylene
- FEP perfluoroethylene propylene
- PE polyethylene
- the reservoir also generally has a high surface area / volume ratio.
- the reservoir is made of rubber and has the shape of a hose nozzle which is connected to the bottom of the hydraulic cylinder.
- the reservoir can be arranged flexibly in the condensation dryer, for example, partially in the process air duct.
- "Thermal contact” here means a direct contact, for example a recirculation and / or an indirect contact, for example by a heat radiation of the process air duct.
- the reservoir is therefore arranged in a bearing shield shaft, where it is flowed around by dry-warm process air.
- the reservoir is in particular an elastomer molding. The molding consists of a meandering arranged and closed at the end of the tube and is integrated into the bottom group of the dryer. In this way, a good thermal contact with the process air is made possible by a heat radiation of the process air duct.
- the drive medium usually has the property that its volume changes as a function of the temperature, wherein preferably the volume of the drive medium increases with increasing temperature. In this case, it is again preferred that the volume of the drive medium increases exponentially with increasing temperature. As a result, the volume of the drive medium initially only increases slightly as the drive medium warms up. In this way, the throttle valve generally stays closed longer. As a rule, it is only opened due to the reciprocating piston driven by the increase in volume of the drive medium when a higher temperature is achieved compared to a linear increase in volume of the drive medium.
- the drive medium contains water or consists of water.
- the achieved increase in volume at a given process air temperature T set can be calculated from known volume-temperature diagrams for a given filling quantity V F in the actuator system.
- organic liquids such as liquid hydrocarbon compositions, and polyethylene glycol, polypropylene glycol may also be used. The latter have the advantage that they are miscible with water.
- the volume of the drive medium reached at a predefined process air temperature and thus also the drive of the lifting piston in the hydraulic cylinder and the opening angle of the throttle flap depend in particular on the charge quantity V F of the drive medium.
- the drive medium based on its weight, preferably at least 90 wt .-% water and in the condensation dryer, the drive medium preferably in an amount of 30 to 70 ml, more preferably 40 to 60 ml, based on a capacity for Laundry items in the range of 5 to 8 kg, is present.
- the working medium is generally present in the actuator system and / or a reservoir connected to the actuator system.
- the actuator system In general, it is the task of the actuator system to adjust the opening angle of the throttle valve as a function of a temperature of the process air.
- the drive medium usually increases in volume when heated.
- the drive medium is generally in contact with the reciprocating piston bottom.
- the reciprocating piston is driven in the hydraulic cylinder.
- the reciprocating piston thereby opens the throttle valve, the adjustment mechanism is connected via a rod connection with the Hubkolbenbolzen.
- the actuator system is generally tight.
- "dense” means that all components are a self-contained system that can be operated virtually lossless and maintenance-free, with the drive medium in a sealed system, and in a particularly preferred embodiment, the reservoir Most preferably, the actuator system is not removably connected to the dryer, for example by welding.
- a condensation dryer is preferred in which the actuator system, the process air duct and / or the control device are set up so that a heat exchange between the drive medium and the warm air in the process air duct can be varied. It is particularly advantageous that in particular the dependence between a temperature of the process air and the position of the throttle valve can be varied. Moreover, it is preferred that the variation of the heat exchange is realized by changing the size of a heat exchange surface between the process air duct and the drive medium. In this case, the heat exchange surface is preferably an area which is connected to a warmest part of the process air channel is in thermal contact. In the condensation dryer is a suitable place for the bearing plate or the bearing shield shaft.
- the size of a heat exchange surface between process air duct and drive medium can be changed, for example, by varying the proportion of a reservoir containing the drive means in the end shield. If the drive means contained, for example, in a tubular reservoir, the length of a piece of tubing that protrudes into the bearing plate, can be varied.
- the sensitivity of the actuator device can be changed, so that the speed of heating the process air and the achievable maximum temperature of the process air can be regulated. Namely, if the heat exchange surface is small, the drive medium is heated weaker, so that it can expand less. As a result, the throttle valve is opened at a relatively high temperature or opened further.
- the throttle valve arranged in the cooling air duct is a circular sheet metal, which is mounted rotatably perpendicularly mounted on an axis in a cylindrical tube and closes the tube in the closed state.
- a circular throttle valve is arranged in the cooling air passage between the cooling air inlet and the condenser of the air-air heat exchanger.
- the cooling air duct also has a mechanical element which prevents the throttle valve completely closing the cooling air duct.
- the mechanical element keeps the throttle valve to generally in an opening angle between 30 ° and 60 °, more preferably between 40 ° and 50 °, most preferably but 45 °.
- the mechanical element according to the invention is not limited in its design.
- the mechanical element may be a mechanical stop, which is firmly connected to the wall of the cooling air duct.
- the mechanical Element be an adjusting screw, which is integrated, for example, in the cooling air duct. By screwing in or unscrewing the screw, an opening angle of the throttle flap can be set variably.
- a mechanical element can advantageously be arranged in the cooling air channel, for example a set screw or a mechanical stop, so that a minimum opening of the throttle flap is predetermined.
- a condensation dryer is preferred in which the throttle valve is arranged in the cooling air channel between a cooling air inlet and the air-air heat exchanger.
- the condensation dryer generally has at least one drive motor for driving the drying chamber, as a rule a drum, as well as process air blowers and cooling air blowers.
- a condensation dryer in which the drive motor is set up in order to simultaneously operate the process air blower and the cooling air blower is preferred.
- the cooling air blower can then not be controlled separately from the process air blower and is therefore not turned off, as a rule.
- the flow of a small flow of cooling air through thedeluftka- channel due to a not fully closed throttle is then advantageous.
- a further drive motor can be present, which drives only the cooling air blower.
- This drive motor is generally connected to the control device.
- a relationship is then advantageously stored, which compares a setpoint temperature and an actual temperature of the process air with each other and throttles and / or shuts off when the setpoint temperature falls below the drive motor.
- the separate drive motor for the cooling air duct is therefore speed-controlled.
- This embodiment of the invention makes it possible that, if the process air temperature is too low, the cooling air volume flow can additionally be reduced by regulating the cooling air blower. As a rule, the temperature of the process air is measured by a temperature sensor.
- a temperature sensor In a preferred embodiment of the dryer according to the invention is therefore in the process air duct, a temperature sensor.
- the temperature sensor is arranged in the process air duct between the heater and the inlet of the process air into the drying chamber.
- a condensation dryer is preferred in which a temperature sensor is arranged in the process air duct and a relationship between a predetermined temperature T set of the process air and an opening of the throttle valve is stored in the control device. If, for example, a particularly high temperature of the process air is desired in the condensation dryer, for example for a hygiene step or for a more rapid execution of a drying program, the throttle flap may hardly be opened.
- the opening of the throttle valve is adjusted by the actuator system as a function of a process air temperature.
- the throttle flap preferably has an opening angle between 30 ° and 60 °, particularly preferably between 40 ° and 50 °, but most preferably 45 °. If the process air heats up, the drive medium in the actuator system, which is in thermal contact with the process air, increases in volume. Due to the increase in volume of the reciprocating piston is driven in the hydraulic cylinder of the actuator system, which according to the invention is connected to the adjustment mechanism of the throttle valve.
- the throttle valve in the cooling air passage is fully opened by the actuator system at a predetermined process air temperature. In this way, the invention allows that at a predetermined process air temperature T set the cooling air volume flow in the cooling air duct reaches its full volume, whereby the heated process air can be efficiently cooled at the condenser of the air-to-air heat exchanger.
- the condensed out of the air-to-air heat exchanger during a drying process water is first collected in a condensate pan and then pumped by a condensate pump, for example, in a sewer or in a condensate tank.
- a condensate pump for example, in a sewer or in a condensate tank.
- the condensate tank can be connected to the actuator system via a line, wherein a valve is arranged in this line, which regulates the inflow of condensate water in the actuator system to compensate for possible losses of drive medium or the Increase the amount of drive medium in the actuator system.
- the control valve is in this case generally connected to a control device.
- a relationship can be stored, which compares an actual and a target temperature of the process air and opens the control valve at a setpoint temperature is exceeded and pumps via a condensate pump a predetermined volume of condensate water V A ktuator in the actuator system , The volume is given by an operating time At A ktuator the condensate pump.
- the fill quantity V F can be preset via the line and the control valve when using water as the drive medium in the actuator system.
- a further relationship is stored in the control device for the increase in volume AV of water at a predetermined process air temperature T set in relation to a predetermined filling quantity in the actuator system V F.
- the condensate in the condensate tank can also be used to clean dryer components, such as a lint filter or a heat exchanger.
- the dryer according to the invention can be equipped as a pure dryer, but also as a washer-dryer.
- a washer-dryer is here understood to mean a combination appliance which has a washing function for washing laundry and a drying function for drying damp laundry.
- the dryer advantageously has an optical and / or acoustic display device for different states of the dryer.
- an optical display device is preferably used.
- the display device can, for example, by Off There would be a text or by lighting different colored light emitting diodes information about the operation of the dryer, for example on the load or on a correspondingly adapted running drying program or a remaining time of a drying program.
- the invention also provides a method for operating a condensation dryer with a drying chamber for items to be dried, a control device, a drive motor, a process air duct in which a process air blower for conveying the process air and a heater for heating the process air are arranged, an air-air Heat exchanger with a cooling air duct, in which a cooling air blower and a throttle valve are arranged, and an actuator system which includes a hydraulic cylinder, a reciprocating piston and a drive medium, wherein the actuator system is frictionally connected via the reciprocating piston with the throttle and in the thermal Contact with the process air duct is, so that an adjustment of the throttle valve in dependence on a temperature of the process air can be made; comprising the steps:
- step (B) heating the drive medium by heat exchange with the process air heated in step (a) to actuate the actuator system by changing the temperature-dependent volume of the drive medium;
- the drive motor simultaneously drives the process air blower and the cooling air blower and the throttle valve is at least partially opened during steps (a) to (c).
- the drive medium in the actuator system is heated by the thermal contact of the actuator system with the process air and increases its volume.
- the volume Increasing the drive medium drives the reciprocating piston in the hydraulic cylinder, whereby the throttle flap in the cooling air duct is opened and the cooling air volume flow increases.
- T set Upon reaching a predetermined process air temperature T set , the cooling air volume flow in the cooling air duct is then generally at a maximum.
- the drive medium cools down in the actuator system and reduces its volume.
- the drive of the reciprocating piston decreases and the throttle valve is closed, wherein the cooling air volume flow decreases in the cooling air passage.
- the increase in volume of the drive medium is exponential.
- the throttle valve initially remains longer in a small opening angle of preferably 30 ° to 60 °, since a warming initially only a small effect on the volume of the drive medium.
- the cooling air volume flow initially also remains low due to the small opening of the throttle flap.
- the process air is cooled less during the heating phase and heats up faster. Energy losses due to excessive cooling can thus be avoided and the drying process can be carried out faster and more energy-efficiently.
- the throttle valve additionally has a return mechanism, in particular a return spring.
- the volume of the drive medium in the actuator system decreases and the piston in the hydraulic cylinder loses power.
- the return mechanism generally counteracts the drive direction of the piston and closes the throttle valve when the drive is released. At the same time, it also returns the reciprocating piston in the hydraulic cylinder via the connection between throttle valve and piston.
- the current actual temperature T ist of a process air is measured via a temperature sensor.
- a temperature sensor arranged in the process air duct measures the temperature of the process air, for example during a drying process.
- a relationship between at least one predetermined desired temperature of the process air T so n and the actual temperature measured by the temperature sensor can advantageously be stored. If the target temperature is exceeded in this particular embodiment by the actual temperature, the control device opens a control valve in a line which connects the actuator system with the condensate tank. In addition, the condensate pump is switched on by the control device for an operating time At A ktuator.
- the operating time At A ktuator the condensate pump is associated with a condensate volume V A ktuator, which is pumped in this time interval of the condensate pump in the actuator system.
- the control unit closes the control valve again. Due to the additional volume in the actuator system, the reciprocating piston is moved to a position in which the throttle flap is more open in the cooling air duct. It flows a larger cooling air volume flow and the process air is more strongly cooled at the condenser of the air-air heat exchanger, wherein the exceeding of the target temperature is counteracted.
- the control device throttles and / or stops an existing second drive motor for the cooling air blower, which drives the cooling air blower in the cooling air duct when the setpoint temperature is undershot by an actual temperature of the process air.
- the throttling and / or the stopping of the drive motor reduces or interrupts the cooling air volume flow in the cooling air duct in this embodiment.
- the process air is cooled less strongly at the air-air heat exchanger, whereby the falling below the target temperature is counteracted.
- a differential value between the setpoint and actual temperature ATdiff is advantageously stored in each case for the drive motor throttling and the stopping of the second drive motor, wherein AT diff throttle ⁇ AT dif f stop applies.
- the invention has numerous advantages. On the one hand, a faster heating of the process air by a reduction of the cooling air volume flow is possible, because overall less heating power must be provided to heat the process air, for example, in a heating phase to the desired process temperature. In this way, a drying process can be performed faster and more energy efficient.
- a further advantage is that the method according to the invention can also be carried out in a self-regulating manner in one embodiment.
- the actuator system as in itself be configured closed, so that it is maintenance-free and preferably firmly integrated into the condensation dryer.
- the dryer according to the invention is inexpensive to produce, so that even in a low price segment, a technology can be provided that allows the user an environmentally friendly and energy-efficient operation.
- Figure 1 shows a vertical section through a dryer according to a first embodiment.
- Figure 2 shows a schematic representation of the actuator system used in the first embodiment of the dryer.
- Figure 3 shows a schematic representation of a) a frontal view of a throttle valve; b) and c) two opening angles of the throttle valve in a cooling air passage of the condensation dryer according to the first embodiment.
- FIG. 1 thus shows a first embodiment of the dryer 1 with a process air duct 2, a heater 4, a process air blower 6, an air-air heat exchanger 5, a cooling air blower 16, a cooling air duct 15, a throttle valve 13, a condensate pan 17, a condensate pump 28 , a condensate channel 18 and a condensate tank 19, a drying chamber 3, a control device 10 and a temperature sensor 30, and an actuator system 12, comprising a hydraulic cylinder 12a, a reciprocating piston 12b, a drive medium 12c (not explicitly shown here) and a reservoir 12d ,
- the reciprocating piston 12b is connected to the throttle valve 13, which is arranged in the cooling air passage 15 between the cooling air inlet 14 and the condenser of the air-air heat exchanger 5, via a rod connection.
- the reservoir 12c is in this first one Embodiment a hose nozzle.
- a between 2 and 5 cm long part of the reservoir 12 d is arranged in the bearing shield shaft 11 of the condensation dryer 1. When operating the condensation dryer 1, this part is thus flowed around by dry-warm process air. This ensures a good thermal contact between the actuator system 12 and process air.
- the heated during operation of the condensation dryer 1 by turning on the heater 4 process air is transported by the process air blower 6 through the process air duct 2.
- the dry-warm process air flows around the arranged in the bearing shield shaft 11 part of the reservoir 12d.
- the drive medium 12c (not shown) within the reservoir 12d heats up and as a result increases its volume. This leads to a movement of the reciprocating piston 12b in the hydraulic cylinder 12a. Via the linkage connection, this movement is transmitted to the adjusting mechanism of the throttle valve 13, whereby the throttle valve 13 is opened.
- the condensation dryer 1 also has a condensate tray 17 for collecting the condensate 23 deposited on the condenser of the air-to-air heat exchanger 5, which is arranged below the air-to-air heat exchanger 5.
- the condensate tray 17 is connected via the condensate channel 18 with a condensate tank 19.
- a condensate pump 28 which pumps the condensate 23 from the condensate pan 17 in the condensate tank 19.
- the condensate tank 19 is also connected to the actuator system 12 via a line 20, in which a control valve 21 is arranged.
- a temperature sensor 30 is arranged between the heater 4 and the inlet into the drying chamber 3 in the process air channel 2.
- a relationship is stored, which compares a determined by the temperature sensor 30 actual temperature of the process air with a desired value. If the setpoint value is exceeded, the control device 10 opens the control valve 21 in the line 20 and condensate 23 is pumped from the condensate tank 19 via the condensate pump 28 into the actuator system 12, wherein the volume V A ktuator over a RadiodauerAt A Ktuator the condensate pump 28 is predetermined.
- the drive motor 29 simultaneously operates the process air blower 6 and the cooling air blower 16.
- the cooling air blower 16 arranged in the cooling air duct 15 conveys cooling air, as a rule air from an installation space of the condensation dryer, from the cooling air inlet 14 to the cooling air outlet 26.
- a water supply 27 is connected via a connection 24 to the condensate container 23, so that sufficient aqueous liquid can be provided for the purification of heat exchanger 5 via the line 20.
- Wäschemit Meeting 25 are also available. 22 means a door of the condensation dryer for the introduction of laundry items not shown here in the drying chamber 3.
- the used as a drying chamber drum 3 is mounted in the embodiment shown in Fig. 1 at the rear bottom by means of a pivot bearing and front 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.
- 9 indicates an (optical) display device for displaying process parameters.
- FIG. 2 shows a schematic representation of the actuator system 12 used in the condensation dryer of FIG. 1.
- a reservoir 12d is connected to the bottom of the hydraulic cylinder 12a.
- the reservoir 12d is designed as a hose nozzle.
- the reservoir 12d is filled with a drive medium 12c (hatched lines) which is in contact with the bottom of the reciprocating piston 12b.
- a part of the reservoir 12d is arranged in the process air duct 2, where it can be flowed around by process air.
- the remaining part of the reservoir 12d is located in this arrangement in the vicinity of the process air channel 2 and is also heated by its heat radiation.
- the reciprocating piston 12b is connected to the adjusting mechanism of the throttle valve 13.
- the connection is a rod connection with linear power transmission.
- FIG. 3 a) -c) shows a schematic representation of an inserted circular throttle valve 13, and two opening angle of the throttle valve 13 in the cooling air passage 15.
- This opening angle can be predetermined, for example, by a mechanical element, for example a set screw 32 (not shown) in the cooling air channel 15. Otherwise, the throttle valve 13, the cooling air passage 15 completely close.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Drying Of Solid Materials (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015200237.3A DE102015200237A1 (en) | 2015-01-12 | 2015-01-12 | Condensation dryer with improved drying and process for its operation |
PCT/EP2015/080071 WO2016113065A1 (en) | 2015-01-12 | 2015-12-16 | Condenser dryer with improved drying capability, and method for operating same |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3245327A1 true EP3245327A1 (en) | 2017-11-22 |
EP3245327B1 EP3245327B1 (en) | 2018-10-17 |
Family
ID=54850189
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15810655.9A Not-in-force EP3245327B1 (en) | 2015-01-12 | 2015-12-16 | Condenser dryer with improved drying capability, and method for operating same |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3245327B1 (en) |
CN (1) | CN107109769B (en) |
DE (1) | DE102015200237A1 (en) |
WO (1) | WO2016113065A1 (en) |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3750304A (en) * | 1971-09-24 | 1973-08-07 | Westinghouse Electric Corp | Semi-recirculatory system for a clothes dryer |
DK69581A (en) * | 1981-02-17 | 1982-08-18 | Rasmussens J Ventilation | DRY TUMBERS, ISRAEL FOR USE IN LAUNDRY |
DE4306217B4 (en) | 1993-02-27 | 2004-04-22 | AEG Hausgeräte GmbH | Program-controlled tumble dryer with a heat pump circuit |
DE10202442B4 (en) | 2002-01-22 | 2005-02-03 | Miele & Cie. Kg | Floor module for a condensation dryer |
KR100459193B1 (en) * | 2002-11-27 | 2004-12-03 | 엘지전자 주식회사 | flow route for cooling in condenser for condensing type clothes drier |
EP1541744A1 (en) * | 2003-12-11 | 2005-06-15 | Electrolux Home Products Corporation N.V. | Household clothes drying machine with improved condenser |
US7367134B2 (en) * | 2004-06-15 | 2008-05-06 | Illinois Tool Works, Inc. | Dishwasher vent assembly |
KR100753507B1 (en) * | 2005-03-25 | 2007-08-31 | 엘지전자 주식회사 | drum type washing machine |
DE102006003817A1 (en) | 2006-01-26 | 2007-08-02 | BSH Bosch und Siemens Hausgeräte GmbH | Dryers and methods for treating a good |
DE102008042757A1 (en) * | 2008-10-10 | 2010-04-15 | BSH Bosch und Siemens Hausgeräte GmbH | Laundry dryer has open air channel, where size of flow cross section of air channel is adjustable, and flow cross-section of replaceable air intake is coordinated for pre-determined range of ambient temperature |
DE102010031268A1 (en) * | 2010-07-13 | 2012-01-19 | BSH Bosch und Siemens Hausgeräte GmbH | Laundry drying apparatus has air intake duct for guiding of air from outer side into laundry treatment room, where air discharge channel is guided outside from laundry treatment room |
DE102011081940A1 (en) | 2011-09-01 | 2013-03-07 | BSH Bosch und Siemens Hausgeräte GmbH | Dryers with a cross-flow heat exchanger and method of its operation |
EP2612963B1 (en) * | 2012-01-05 | 2016-03-30 | Electrolux Home Products Corporation N.V. | Appliance for drying laundry |
-
2015
- 2015-01-12 DE DE102015200237.3A patent/DE102015200237A1/en not_active Withdrawn
- 2015-12-16 WO PCT/EP2015/080071 patent/WO2016113065A1/en active Application Filing
- 2015-12-16 EP EP15810655.9A patent/EP3245327B1/en not_active Not-in-force
- 2015-12-16 CN CN201580071973.7A patent/CN107109769B/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN107109769B (en) | 2019-07-09 |
WO2016113065A1 (en) | 2016-07-21 |
DE102015200237A1 (en) | 2016-07-14 |
CN107109769A (en) | 2017-08-29 |
EP3245327B1 (en) | 2018-10-17 |
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