WO2014102073A1 - Heat pump laundry dryer - Google Patents

Heat pump laundry dryer Download PDF

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Publication number
WO2014102073A1
WO2014102073A1 PCT/EP2013/076603 EP2013076603W WO2014102073A1 WO 2014102073 A1 WO2014102073 A1 WO 2014102073A1 EP 2013076603 W EP2013076603 W EP 2013076603W WO 2014102073 A1 WO2014102073 A1 WO 2014102073A1
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WO
WIPO (PCT)
Prior art keywords
circuit board
compressor
provides
speed
control unit
Prior art date
Application number
PCT/EP2013/076603
Other languages
French (fr)
Inventor
Gokhan SIR
Umit PEHLIVAN
Onder Balioglu
Original Assignee
Arcelik Anonim Sirketi
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 Arcelik Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Priority to EP13821080.2A priority Critical patent/EP2938775B1/en
Priority to ES13821080.2T priority patent/ES2618413T3/en
Publication of WO2014102073A1 publication Critical patent/WO2014102073A1/en

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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
    • 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
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/50—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to heat pumps, e.g. pressure or flow rate
    • 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
    • D06F2105/26—Heat pumps
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/28—Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress
    • 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
    • D06F58/50—Responding to irregular working conditions, e.g. malfunctioning of blowers

Definitions

  • the present invention relates to a heat pump laundry dryer comprising a variable speed compressor.
  • the heat pump used for drying the laundry is composed of a cooling line wherein the refrigerant flows, an evaporator, a condenser and a compressor that provides the circulation of the refrigerant by pressurizing it.
  • the drying process is performed by passing the processing air over the laundry in the closed cycle.
  • the condenser heats the processing air and the evaporator condenses the processing air.
  • the refrigerant delivered to the condenser from the compressor with increased pressure and temperature is delivered to the evaporator by passing through the expansion member, for example the capillary tube, or the expansion valve with decreased pressure.
  • a variable speed compressor is required for reducing the duration of the drying process and the energy consumption.
  • the compressor When the drying load increases according to the drying program selected by the user, the compressor is operated at high speed.
  • a circuit board is used for adjusting the speed of the compressor and a heat sink is disposed on the circuit board for cooling the electronic elements through which high current flows.
  • the current that flows through the circuit board used for adjusting the speed of the compressor varies depending on the speed of the compressor.
  • the components heating up due to the high current on the compressor circuit board are cooled by natural convection by means of a heat sink placed on the circuit board.
  • the control circuit of the electric motor driving the drum, the processing air fan and/or the compressor is at least partially placed between the evaporator and the condenser, inside the air stream circuit.
  • the humid air passing through the evaporator without fully condensing condenses on the electronic control circuit and causes the control circuit to be damaged.
  • the aim of the present invention is the realization of a heat pump laundry dryer comprising a variable speed compressor and wherein the circuit board that controls the compressor is prevented from overheating.
  • the heat pump laundry dryer realized in order to attain the aim of the present invention comprises a variable speed compressor the speed of which is adjusted by means of a circuit board according to the drying setting selected by the user and the amount of the laundry.
  • the components on the circuit board are cooled by a heat sink and a cooling fan that cools the heat sink by forced convection.
  • a temperature sensor placed on the circuit board or the heat sink detects the heating level of the circuit board.
  • the temperature of the circuit board varies depending on the speed of the compressor and the control unit provides the cooling of the heat sink and hence the circuit board in accordance with the amount of increase in the temperature thereof by increasing/decreasing the speed of the cooling fan.
  • the control unit provides the speed of the cooling fan to be increased upon detecting by means of the temperature sensor that the temperature of the circuit board is higher than the predetermined limit value and provides the speed of the cooling fan to be decreased or the cooling fan to be stopped upon detecting that the temperature of the circuit board is lower than the limit value.
  • the control unit upon detecting that the temperature of the circuit board is high, decides that the temperature of the compressor is increased excessively and provides the speed of the compressor to be decreased or the speed of the processing air fan to be increased.
  • control unit provides the speed of the compressor cooling fan to be increased upon detecting that the temperature of the circuit board is high.
  • control unit decides that the condensing efficiency of the evaporator is low and the compressor is overheated by operating excessively upon detecting that the temperature of the circuit board is high.
  • the control unit enables the flow rate of the refrigerant passing through the expansion member to be increased and decreases the compressor duty cycle by increasing the efficiency of the evaporator.
  • the circuit board is placed behind the front panel whereon the main control unit, the display and the buttons are mounted.
  • the circuit board is positioned away from the compressor and prevented from being affected due to heat and moisture.
  • the circuit board that operates the variable speed compressor is cooled in accordance with the changes in the compressor speed and the components on the circuit board are prevented from being damaged.
  • the efficiency of the compressor is increased by adjusting the speeds of the compressor, the processing air fan and/or the drum motor and energy consumption is reduced.
  • Figure 1 – is the schematic view of a heat pump laundry dryer comprising variable speed compressor.
  • the heat pump laundry dryer (1) comprises a drum (2) wherein the laundry to be dried is placed, a processing air fan (3), an air circulation duct (4) wherein the air cycle is performed by means of the processing air fan (3), a variable speed compressor (5) that performs the refrigerant cycle, that provides the suction and discharge of the refrigerant, the speed of which is adjusted in accordance with the drying load, an evaporator (6) that cools and condenses the processing air, a condenser (7) that provides the processing air to be heated, an expansion member (8) disposed on the cooling line, between the condenser (7) and the evaporator (6), a circuit board (9) that drives the compressor (5), a heat sink (10) that provides the components on the circuit board (9) to be cooled and a control unit (11) that regulates the operation of the laundry dryer (1).
  • the laundry dryer (1) of the present invention comprises
  • a cooling fan (13) placed near the heat sink (10) and that provides the circuit board (9) to be cooled by forced convection over the heat sink (10) and
  • control unit (11) that changes the speed of the cooling fan (13) according to the data received from the temperature sensor (12) and thus provides the circuit board (9) to be cooled in accordance with the heating level thereof that changes depending on the changes in the speed of the compressor (5).
  • variable speed compressor (5) which is also known as “inverter” type, is used.
  • the circuit board (9) changes the speed (rpm) of the compressor (5) in accordance with the drying program selection of the user.
  • the compressor (5) is operated at high speed.
  • the speed of the compressor (5) is increased, the temperature of the components on the circuit board (9) also increase and the temperature sensor (12) that is directly placed on the circuit board (9) or on the heat sink (10) detects the increase of temperature in the circuit board (9).
  • the control unit (11) increases the speed of the cooling fan (13) and thus speeds up the cooling of the circuit board (9) upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is higher than the limit value predetermined by the experimental studies and recorded in the memory thereof.
  • the control unit (11) decreases the speed of the cooling fan (13) or stops the cooling fan (13) upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is lower than the predetermined limit value and thus prevents unnecessary energy consumption.
  • the control unit (11) upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is higher than the predetermined limit value, decides that the temperature of the compressor (5) is increased and sends command to the circuit board (9) and thus provides the speed of the compressor (5) to be decreased and prevents the compressor (5) from overheating.
  • the control unit (11) decides that the temperature of the compressor (5) is increased and increases the speed of the processing air by increasing the speed of the processing air fan (3) and thus provides the load of the compressor (5) to be reduced and prevents the compressor (5) from overheating.
  • the electric motor (not illustrated in the figures) that drives the processing air fan (3) drives the drum (2) as well, when the speed of the processing air fan (3) is increased, the speed of the drum (2) is also increased, a greater amount of the drying load is compensated by the processing air cycle and the load of the compressor (5) is reduced.
  • the laundry dryer (1) comprises a compressor fan (14) that provides the compressor (5) to be cooled, and upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is higher than the predetermined limit value, the control unit (11) decides that the temperature of the compressor (5) is increased and increases the speed of the compressor fan (14).
  • the expansion member (8) is an expansion valve wherein the flow of the refrigerant can be adjusted, and upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is higher than the predetermined limit value, the control unit (11) decides that the evaporator (6) cannot perform sufficient condensing and provides the flow rate of the refrigerant passing through the expansion member (8) to be increased.
  • the condensing effectiveness of the evaporator (6) is increased and overheating is prevented by reducing the compressor (5) duty cycle.
  • the laundry dryer (1) comprises a front panel (15) whereon the control unit (11), the display and the buttons (not shown in the figures) are mounted and the circuit board (9) is placed near the control unit (11), behind the front panel (15).
  • the circuit board (9) is positioned away from the area where the compressor (5) is disposed and thus prevented from being affected due to heat and moisture.
  • the components on the circuit board (9) that drives the variable speed compressor (5) are prevented from being damaged due to overheating.
  • the efficiency of the compressor (5) is increased by adjusting the speeds of the compressor (5), the processing air fan (3) and/or the drum (2) motor and energy consumption is reduced.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Abstract

The present invention relates to a heat pump laundry dryer (1) comprising a drum (2) wherein the laundry to be dried is placed, a processing air fan (3), an air circulation duct (4) wherein the air cycle is performed by means of the processing air fan (3), a variable speed compressor (5) that performs the refrigerant cycle and provides the suction and discharge of the refrigerant, the speed of which is adjusted in accordance with the drying load, an evaporator (6) that cools and condenses the processing air, a condenser (7) that provides the processing air to be heated, an expansion member (8) disposed on the cooling line, between the condenser (7) and the evaporator (6), a circuit board (9) that drives the compressor (5), and a heat sink (10) that provides the components on the circuit board (9) to be cooled.

Description

HEAT PUMP LAUNDRY DRYER
The present invention relates to a heat pump laundry dryer comprising a variable speed compressor.
In heat pump laundry dryers, the heat pump used for drying the laundry is composed of a cooling line wherein the refrigerant flows, an evaporator, a condenser and a compressor that provides the circulation of the refrigerant by pressurizing it. The drying process is performed by passing the processing air over the laundry in the closed cycle. The condenser heats the processing air and the evaporator condenses the processing air. In the refrigerant cycle, the refrigerant delivered to the condenser from the compressor with increased pressure and temperature is delivered to the evaporator by passing through the expansion member, for example the capillary tube, or the expansion valve with decreased pressure. In heat pump laundry dryers, a variable speed compressor is required for reducing the duration of the drying process and the energy consumption. When the drying load increases according to the drying program selected by the user, the compressor is operated at high speed. A circuit board is used for adjusting the speed of the compressor and a heat sink is disposed on the circuit board for cooling the electronic elements through which high current flows. The current that flows through the circuit board used for adjusting the speed of the compressor varies depending on the speed of the compressor. The components heating up due to the high current on the compressor circuit board are cooled by natural convection by means of a heat sink placed on the circuit board. When the drying load increases in the heat pump laundry dryer, the temperature of the circuit board increases excessively depending on the increase in the speed of the compressor and the heat sink becomes insufficient for cooling the circuit board.
In the state of the art European Patent Application No. EP2312049, in the heat pump laundry dryer, the control circuit of the electric motor driving the drum, the processing air fan and/or the compressor, is at least partially placed between the evaporator and the condenser, inside the air stream circuit. The humid air passing through the evaporator without fully condensing condenses on the electronic control circuit and causes the control circuit to be damaged.
The aim of the present invention is the realization of a heat pump laundry dryer comprising a variable speed compressor and wherein the circuit board that controls the compressor is prevented from overheating.
The heat pump laundry dryer realized in order to attain the aim of the present invention comprises a variable speed compressor the speed of which is adjusted by means of a circuit board according to the drying setting selected by the user and the amount of the laundry.
The components on the circuit board are cooled by a heat sink and a cooling fan that cools the heat sink by forced convection.
A temperature sensor placed on the circuit board or the heat sink detects the heating level of the circuit board. The temperature of the circuit board varies depending on the speed of the compressor and the control unit provides the cooling of the heat sink and hence the circuit board in accordance with the amount of increase in the temperature thereof by increasing/decreasing the speed of the cooling fan.
The control unit provides the speed of the cooling fan to be increased upon detecting by means of the temperature sensor that the temperature of the circuit board is higher than the predetermined limit value and provides the speed of the cooling fan to be decreased or the cooling fan to be stopped upon detecting that the temperature of the circuit board is lower than the limit value.
In an embodiment of the present invention, upon detecting that the temperature of the circuit board is high, the control unit decides that the temperature of the compressor is increased excessively and provides the speed of the compressor to be decreased or the speed of the processing air fan to be increased.
In another embodiment of the present invention, the control unit provides the speed of the compressor cooling fan to be increased upon detecting that the temperature of the circuit board is high.
In another embodiment of the present invention, the control unit decides that the condensing efficiency of the evaporator is low and the compressor is overheated by operating excessively upon detecting that the temperature of the circuit board is high. The control unit enables the flow rate of the refrigerant passing through the expansion member to be increased and decreases the compressor duty cycle by increasing the efficiency of the evaporator.
In another embodiment of the present invention, the circuit board is placed behind the front panel whereon the main control unit, the display and the buttons are mounted. Thus, the circuit board is positioned away from the compressor and prevented from being affected due to heat and moisture.
In the laundry dryer of the present invention, the circuit board that operates the variable speed compressor is cooled in accordance with the changes in the compressor speed and the components on the circuit board are prevented from being damaged. The efficiency of the compressor is increased by adjusting the speeds of the compressor, the processing air fan and/or the drum motor and energy consumption is reduced.
The laundry dryer realized in order to attain the aim of the present invention is illustrated in the attached figure, where:
Figure 1 – is the schematic view of a heat pump laundry dryer comprising variable speed compressor.
The elements illustrated in the figure are numbered as follows:
  1. Laundry dryer
  2. Drum
  3. Processing air fan
  4. Air circulation duct
  5. Compressor
  6. Evaporator
  7. Condenser
  8. Expansion member
  9. Circuit board
  10. Heat sink
  11. Control unit
  12. Temperature sensor
  13. Cooling fan
  14. Compressor fan
  15. Front panel
The heat pump laundry dryer (1) comprises a drum (2) wherein the laundry to be dried is placed, a processing air fan (3), an air circulation duct (4) wherein the air cycle is performed by means of the processing air fan (3), a variable speed compressor (5) that performs the refrigerant cycle, that provides the suction and discharge of the refrigerant, the speed of which is adjusted in accordance with the drying load, an evaporator (6) that cools and condenses the processing air, a condenser (7) that provides the processing air to be heated, an expansion member (8) disposed on the cooling line, between the condenser (7) and the evaporator (6), a circuit board (9) that drives the compressor (5), a heat sink (10) that provides the components on the circuit board (9) to be cooled and a control unit (11) that regulates the operation of the laundry dryer (1).
The laundry dryer (1) of the present invention comprises
- a temperature sensor (12) placed on the circuit board (9) or the heat sink (10) and that detects the temperature of the compressor (5) circuit board (9),
- a cooling fan (13) placed near the heat sink (10) and that provides the circuit board (9) to be cooled by forced convection over the heat sink (10) and
- a control unit (11) that changes the speed of the cooling fan (13) according to the data received from the temperature sensor (12) and thus provides the circuit board (9) to be cooled in accordance with the heating level thereof that changes depending on the changes in the speed of the compressor (5).
In the laundry dryer (1) of the present invention, a variable speed compressor (5), which is also known as “inverter” type, is used. The circuit board (9) changes the speed (rpm) of the compressor (5) in accordance with the drying program selection of the user. When drying load increases, the compressor (5) is operated at high speed. When the speed of the compressor (5) is increased, the temperature of the components on the circuit board (9) also increase and the temperature sensor (12) that is directly placed on the circuit board (9) or on the heat sink (10) detects the increase of temperature in the circuit board (9).
The control unit (11) increases the speed of the cooling fan (13) and thus speeds up the cooling of the circuit board (9) upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is higher than the limit value predetermined by the experimental studies and recorded in the memory thereof.
The control unit (11) decreases the speed of the cooling fan (13) or stops the cooling fan (13) upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is lower than the predetermined limit value and thus prevents unnecessary energy consumption.
In an embodiment of the present invention, upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is higher than the predetermined limit value, the control unit (11) decides that the temperature of the compressor (5) is increased and sends command to the circuit board (9) and thus provides the speed of the compressor (5) to be decreased and prevents the compressor (5) from overheating.
In another embodiment of the present invention, upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is higher than the predetermined limit value, the control unit (11) decides that the temperature of the compressor (5) is increased and increases the speed of the processing air by increasing the speed of the processing air fan (3) and thus provides the load of the compressor (5) to be reduced and prevents the compressor (5) from overheating. The electric motor (not illustrated in the figures) that drives the processing air fan (3) drives the drum (2) as well, when the speed of the processing air fan (3) is increased, the speed of the drum (2) is also increased, a greater amount of the drying load is compensated by the processing air cycle and the load of the compressor (5) is reduced.
In another embodiment of the present invention, the laundry dryer (1) comprises a compressor fan (14) that provides the compressor (5) to be cooled, and upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is higher than the predetermined limit value, the control unit (11) decides that the temperature of the compressor (5) is increased and increases the speed of the compressor fan (14).
In another embodiment of the present invention, the expansion member (8) is an expansion valve wherein the flow of the refrigerant can be adjusted, and upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is higher than the predetermined limit value, the control unit (11) decides that the evaporator (6) cannot perform sufficient condensing and provides the flow rate of the refrigerant passing through the expansion member (8) to be increased. Thus, the condensing effectiveness of the evaporator (6) is increased and overheating is prevented by reducing the compressor (5) duty cycle.
In an embodiment of the present invention, the laundry dryer (1) comprises a front panel (15) whereon the control unit (11), the display and the buttons (not shown in the figures) are mounted and the circuit board (9) is placed near the control unit (11), behind the front panel (15). The circuit board (9) is positioned away from the area where the compressor (5) is disposed and thus prevented from being affected due to heat and moisture.
In the laundry dryer (1) of the present invention, the components on the circuit board (9) that drives the variable speed compressor (5) are prevented from being damaged due to overheating. The efficiency of the compressor (5) is increased by adjusting the speeds of the compressor (5), the processing air fan (3) and/or the drum (2) motor and energy consumption is reduced.

Claims (8)

  1. A laundry dryer (1) comprising a drum (2), a processing air fan (3), an air circulation duct (4) and a variable speed compressor (5) that performs the refrigerant cycle, the speed of which is adjusted in accordance with the drying load, an evaporator (6) that cools and condenses the processing air, a condenser (7) that provides the processing air to be heated, an expansion member (8) disposed between the condenser (7) and the evaporator (6), a circuit board (9) that drives the compressor (5), a heat sink (10) that provides the components on the circuit board (9) to be cooled and a control unit (11), characterized by
    - a temperature sensor (12) placed on the circuit board (9) or the heat sink (10) and that detects the temperature of the circuit board (9),
    -a cooling fan (13) placed near the heat sink (10) and that provides the circuit board (9) to be cooled by forced convection and
    - a control unit (11) that provides the speed of the cooling fan (13) to be changed according to the data received from the temperature sensor (12) and thus provides the circuit board (9) to be cooled in accordance with the heating level thereof that changes depending on the speed of the compressor (5).
  2. The laundry dryer (1) as in Claim 1, characterized by the control unit (11) that provides the speed of the cooling fan (13) to be increased upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is higher than the predetermined limit value.
  3. The laundry dryer (1) as in Claim 1, characterized by the control unit (11) that provides the speed of the cooling fan (13) to be decreased or the cooling fan (13) to be stopped upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is lower than the predetermined limit value.
  4. The laundry dryer (1) as in any one of the above claims, characterized by the control unit (11) that decides that the temperature of the compressor (5) is increased and provides the speed of the compressor (5) to be decreased by sending command to the circuit board (9) upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is higher than the predetermined limit value.
  5. The laundry dryer (1) as in any one of the above claims, characterized by the control unit (11) that provides the speed of the processing air fan (3) to be increased upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is higher than the predetermined limit value.
  6. The laundry dryer (1) as in any one of the above claims, characterized by a compressor fan (14) providing the compressor (5) to be cooled and by the control unit (11) that provides the speed of the compressor fan (14) to be increased upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is higher than the predetermined limit value.
  7. The laundry dryer (1) as in any one of the above claims, characterized by the expansion member (8) which is an expansion valve wherein the flow of the refrigerant can be adjusted and by the control unit (11) that decides that the evaporator (6) cannot perform sufficient condensing and provides the flow rate of the refrigerant passing through the expansion member (8) to be increased upon detecting by means of the temperature sensor (12) that the temperature of the circuit board (9) is higher than the predetermined limit value.
  8. The laundry dryer (1) as in any one of the above claims, characterized by a front panel (15) whereon the control unit (11), the display and the buttons are mounted and by the circuit board (9) placed near the control unit (11), behind the front panel (15).
PCT/EP2013/076603 2012-12-27 2013-12-13 Heat pump laundry dryer WO2014102073A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13821080.2A EP2938775B1 (en) 2012-12-27 2013-12-13 Heat pump laundry dryer
ES13821080.2T ES2618413T3 (en) 2012-12-27 2013-12-13 Clothes dryer with heat pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TRA2012/15462 2012-12-27
TR201215462 2012-12-27

Publications (1)

Publication Number Publication Date
WO2014102073A1 true WO2014102073A1 (en) 2014-07-03

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Application Number Title Priority Date Filing Date
PCT/EP2013/076603 WO2014102073A1 (en) 2012-12-27 2013-12-13 Heat pump laundry dryer

Country Status (3)

Country Link
EP (1) EP2938775B1 (en)
ES (1) ES2618413T3 (en)
WO (1) WO2014102073A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
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WO2016108793A1 (en) 2014-12-30 2016-07-07 Arçeli̇k Anoni̇m Şi̇rketi̇ A heat pump laundry dryer
US10087569B2 (en) 2016-08-10 2018-10-02 Whirlpool Corporation Maintenance free dryer having multiple self-cleaning lint filters
US10161665B2 (en) 2013-03-14 2018-12-25 Whirlpool Corporation Refrigerator cooling system having secondary cooling loop
CN110306330A (en) * 2018-03-27 2019-10-08 青岛海尔洗衣机有限公司 Clothes treatment device and its control panel cooling means
US10502478B2 (en) 2016-12-20 2019-12-10 Whirlpool Corporation Heat rejection system for a condenser of a refrigerant loop within an 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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US11542653B2 (en) 2016-10-14 2023-01-03 Whirlpool Corporation Filterless air-handling system for a heat pump laundry appliance
US10519591B2 (en) 2016-10-14 2019-12-31 Whirlpool Corporation Combination washing/drying laundry appliance having a heat pump system with reversible condensing and evaporating heat exchangers
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