WO2013098014A2 - Peltier element control circuit for household appliances - Google Patents

Peltier element control circuit for household appliances Download PDF

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Publication number
WO2013098014A2
WO2013098014A2 PCT/EP2012/073635 EP2012073635W WO2013098014A2 WO 2013098014 A2 WO2013098014 A2 WO 2013098014A2 EP 2012073635 W EP2012073635 W EP 2012073635W WO 2013098014 A2 WO2013098014 A2 WO 2013098014A2
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WO
WIPO (PCT)
Prior art keywords
peltier
control circuit
voltage
switching means
microcontroller
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PCT/EP2012/073635
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French (fr)
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WO2013098014A3 (en
Inventor
Namik Yilmaz
Ilkin Tacan
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Arcelik Anonim Sirketi
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Publication of WO2013098014A2 publication Critical patent/WO2013098014A2/en
Publication of WO2013098014A3 publication Critical patent/WO2013098014A3/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M7/2176—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only comprising a passive stage to generate a rectified sinusoidal voltage and a controlled switching element in series between such stage and the output

Definitions

  • the present invention relates to a control circuit that controls the Peltier elements used in household appliances.
  • the Peltier element provides cooling on one surface and heating on the other surface by the current generated as a result of the voltage applied thereon.
  • the use of Peltier elements is known in household appliances like the laundry dryer and dishwasher wherein heating cycle and drying cycle are performed by condensing the air.
  • more than one Peltier element is used in a Peltier unit (Peltier module) by being connected in series or in parallel. Since the Peltier elements are operated with low DC voltage and high current values, a rectifier that converts AC mains voltage to DC voltage, voltage dividers and capacitors that supply the suitable voltage to Peltier elements are used between the AC mains voltage whereto the household appliances are connected and the Peltier elements.
  • the AC mains voltage is first rectified and the rectified high value DC voltage is switched by voltage dividers carrying high voltage and is stored by the capacitor. Since the capacitors that feed the Peltier elements are charged by rectified high voltage received from the mains, they are selected from high voltage value and high capacitance value type and this increases costs. Since the power of the Peltier elements is high, the switching means charging the capacitor also carry high value current and therefore the switching means should be selected as high current type which is another factor that increases costs. Moreover, in voltage dividing structures, the power adjustments of the Peltier elements cannot be made precisely and constant power cannot be obtained from the Peltier elements under conditions wherein mains voltage is variable.
  • the International Patent Applications No. WO2007125012, WO2007125013, WO2007134924 and WO2007134925 relate to control circuits that regulate operations of Peltier elements that are used in household appliances, particularly in laundry dryers.
  • the aim of the present invention is the realization of a safe and low cost control circuit that controls the Peltier elements used in household appliances.
  • the control circuit realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, is suitable for use in household appliances like laundry dryer, dishwasher wherein Peltier elements are operated for heating and drying purposes, comprises a rectifier that converts AC mains voltage into DC voltage by rectifying, a Peltier unit or Peltier module having Peltier elements connected in series or in parallel, a capacitor connected in parallel with the Peltier unit and a microcontroller that provides the Peltier unit to be operated with the required Peltier voltage, and an AC switching means, for example a triac, is connected to the AC mains voltage prior to the rectifier; and a DC switching means, for example an IGBT, that is connected in series with the capacitor and the Peltier unit connected in parallel and that switches the capacitor increases the charging rate of the capacitor by switching at least twice at each period of the mains voltage, thereby enabling the use of a capacitor having a lower capacitance value.
  • a rectifier that converts AC mains voltage into DC voltage by rectifying
  • the Peltier voltage is controlled by means of a voltage measuring unit.
  • the microcontroller upon detecting that the AC mains voltage is higher or lower than the normal value, regulates the turn-on and turn-off durations of the DC switching means by receiving Peltier voltage feedback from the voltage measuring unit and provides the Peltier elements to be operated at constant power in variable mains voltage.
  • the Peltier current is measured by means of a first current sensor.
  • the microcontroller monitors the Peltier current applied to the Peltier unit by means of the first current sensor and provides the power adjustment of the Peltier unit to be made.
  • the current switched by the DC switching means is measured by means of a second current sensor.
  • the microcontroller detects the current conducted by the DC switching means by means of the second current sensor and turns off the DC switching means to protect it against excessive current values.
  • a low capacitance capacitor is used for feeding the Peltier unit and cost advantage is provided.
  • Figure 1 – is the schematic view of a control circuit that controls the Peltier elements.
  • Figure 2 — is the graphic showing the change in the voltage applied to the Peltier elements with respect to time.
  • Figure 3 – is the graphic of the change in the voltage applied to the Peltier elements with respect to time in another embodiment of the present invention.
  • the control circuit (1) suitable for use in household appliances, comprises a passive harmonic filter (2) connected to the live wire at the AC mains voltage inlet and that decreases the amplitude of the high-value peak currents to make them close to the sine wave form of the AC mains voltage, a rectifier (3) that converts the AC mains voltage into DC voltage by rectifying, a Peltier unit (4) having one or more than one Peltier element (P) operated by the rectified voltage, a capacitor (5) connected in parallel with the Peltier unit (4), feeding the Peltier unit (4) by being charged and discharged with the rectified voltage and a microcontroller (6) that provides the Peltier unit (4) to be operated with the desired Peltier voltage (Vp) and Peltier current (Ip) by monitoring the AC mains voltage.
  • a passive harmonic filter (2) connected to the live wire at the AC mains voltage inlet and that decreases the amplitude of the high-value peak currents to make them close to the sine wave form of the AC mains voltage
  • a rectifier (3) that converts the AC mains
  • the control circuit (1) of the present invention comprises a DC switching means (7) that is connected in series with the capacitor (5) and the Peltier unit (4) connected in parallel and that switches the capacitor (5) by being switched to the turn-on and turn-off positions more than once at each period (T) of the rectified mains voltage by the microcontroller (6), thereby providing the capacitor (5) to be charged with a switching frequency higher than the mains voltage.
  • the DC switching means (7) increases the charging rate of the capacitor (5) and allows the use of a low capacitance capacitor (5).
  • the microcontroller (6) monitors the AC mains voltage by means of a mains voltage measuring means (not shown in the figures), switches the DC switching means (7) to the turn-on and turn-off positions more than once at each period (T) of the mains voltage rectified in order to generate the Peltier voltage (Vp) and the Peltier current (Ip) to be supplied to the Peltier unit (4) and switches the DC switching means (7) to the turned-off position when the desired Peltier voltage (Vp) is attained.
  • a mains voltage measuring means not shown in the figures
  • the capacitor (5) When the DC switching means (7) is in the turn-on position, the capacitor (5) is charged and when the DC switching means (7) is in the turn-off position, the capacitor (5) is discharged and the Peltier unit (4) is provided to be operated by being fed with the suitable Peltier voltage (Vp) ( Figure 2).
  • the DC switching means (7) allows the switching to be made as much as desired at each period (T) of the mains voltage and the Peltier unit (4) is provided to be supplied with the desired Peltier voltage (Vp) by increasing the charging rate of the capacitor (5).
  • a capacitor (5) with lower capacitance than the similar embodiments is used and cost advantage is provided.
  • the microcontroller (6) provides the DC switching means (7) to switch twice at each period (T) of the mains voltage, that is at the beginning and the end of each period (T) of the mains voltage, thereby providing the capacitor (5) to be charged with a frequency twice the mains voltage frequency ( Figure 2). For example, when the mains voltage frequency is 50 Hz, the capacitor (5) is charged with a 100 Hz frequency by the DC switching means (7).
  • the microcontroller (6) provides the DC switching means (7) to switch more than twice at each period (T) of the mains voltage and provides the Peltier unit (4) to be supplied with the constant Peltier voltage (Vp) of which the oscillation is almost completely stopped ( Figure 3).
  • the mains voltage frequency is 50Hz
  • control circuit (1) comprises a voltage measuring unit (8) connected in parallel with the Peltier unit (4) and that measures the Peltier voltage (Vp) between the inlet and the outlet of the Peltier unit (4) and feedbacks to the microcontroller (6) ( Figure 1).
  • the microcontroller (6) monitors the AC mains voltage and upon detecting that the AC mains voltage is higher or lower than normal value, regulates the turn-on and turn-off durations of the DC switching means (7) by receiving Peltier voltage (Vp) feedback from the voltage measuring unit (8), thus, provides the Peltier unit (4) to be operated with constant supply voltage (Vp) under variable mains voltage conditions.
  • the operation of the DC switching means (7) is intervened by the microcontroller (6) in the mains voltage waviness, thereby compensating undesired power surge or power decrease in the Peltier unit (4), providing the power obtained from the Peltier unit (4) to remain constant.
  • control circuit (1) comprises a first current sensor (9) connected in series with the Peltier unit (4), that measures the Peltier current (Ip) and feedbacks to the microcontroller (6) ( Figure 1).
  • the microcontroller (6) monitors the Peltier current (Ip) applied to the Peltier unit (4) by means of the first current sensor (9) and when required, regulates the Peltier voltage (Vp) and hence the Peltier current (Ip) by changing the turn-on and turn-off durations of the DC switching means (7) and provides the Peltier unit (4) to be operated at the desired power level by adjusting the power level of the Peltier unit (4).
  • control circuit (1) comprises a second current sensor (10) connected in series with the DC switching means (7), that measures the charging currents of the capacitor (5) switched by the DC switching means (7) and feedbacks to the microcontroller (6) ( Figure 1).
  • the microcontroller (6) monitors the charging currents of the capacitor (5) switched by the DC switching means (7) by means of the second current sensor (10) and if the current exceeds the predetermined limit value, turns off the DC switching means (7) to protect it against excessive currents.
  • the DC switching means (7) is an IGBT (Insulated Gate Bipolar Transistor) ( Figure 1).
  • the microcontroller (6) controls the DC switching means (7) from the emitter (E) terminal and regulates the turn-on and turn-off durations of the DC switching means (7) and hence the Peltier voltage (Vp) required for operating the Peltier unit (4) by charging the capacitor (5).
  • Vp Peltier voltage
  • the household appliance wherein the control circuit (1) is used is a laundry dryer.
  • the household appliance wherein the control circuit (1) is used is a dishwasher.
  • the household appliance wherein the control circuit (1) is used is a laundry washer/dryer.
  • the household appliance wherein the control circuit (1) is used is a refrigerator.
  • the DC switching means (7) charges the capacitor (5) with a frequency higher than the mains voltage frequency and the Peltier voltage (Vp) supplying the Peltier unit (4) is provided to remain constant by increasing the charging rate of the capacitor (5).
  • the value of the current charging the capacitor (5) decreases, thus a standard low capacitance capacitor (5) can be used and cost advantage is provided. Since the DC switching means (7) charging the capacitor (5) switches a low value current, the cost of the control circuit (1) is decreased by selecting a low-current-conducting switching means.
  • the DC switching means (7) limits the peak currents drawn from the mains as well and a less-precise, low cost passive harmonic filter (2) can be used.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ac-Ac Conversion (AREA)
  • Rectifiers (AREA)

Abstract

The present invention relates to a control circuit (1), suitable for use in household appliances, comprising a passive harmonic filter (2) connected to the live wire at the AC mains voltage inlet and that decreases the amplitude of the high-value peak currents to make them close to the sine wave form of the AC mains voltage, a rectifier (3) that converts the AC mains voltage into DC voltage by rectifying, a Peltier unit (4) having one or more than one Peltier element (P) operated by the rectified voltage, a capacitor (5) connected in parallel with the Peltier unit (4), feeding the Peltier unit (4) by being charged and discharged with the rectified voltage and a microcontroller (6) that provides the Peltier unit (4) to be operated with the desired Peltier voltage (Vp) and Peltier current (Ip) by monitoring the AC mains voltage.

Description

PELTIER ELEMENT CONTROL CIRCUIT FOR HOUSEHOLD APPLIANCES
The present invention relates to a control circuit that controls the Peltier elements used in household appliances.
The Peltier element provides cooling on one surface and heating on the other surface by the current generated as a result of the voltage applied thereon. The use of Peltier elements is known in household appliances like the laundry dryer and dishwasher wherein heating cycle and drying cycle are performed by condensing the air. Generally, more than one Peltier element is used in a Peltier unit (Peltier module) by being connected in series or in parallel. Since the Peltier elements are operated with low DC voltage and high current values, a rectifier that converts AC mains voltage to DC voltage, voltage dividers and capacitors that supply the suitable voltage to Peltier elements are used between the AC mains voltage whereto the household appliances are connected and the Peltier elements. In the technique, in order to energize the Peltier elements, the AC mains voltage is first rectified and the rectified high value DC voltage is switched by voltage dividers carrying high voltage and is stored by the capacitor. Since the capacitors that feed the Peltier elements are charged by rectified high voltage received from the mains, they are selected from high voltage value and high capacitance value type and this increases costs. Since the power of the Peltier elements is high, the switching means charging the capacitor also carry high value current and therefore the switching means should be selected as high current type which is another factor that increases costs. Moreover, in voltage dividing structures, the power adjustments of the Peltier elements cannot be made precisely and constant power cannot be obtained from the Peltier elements under conditions wherein mains voltage is variable.
The International Patent Applications No. WO2007125012, WO2007125013, WO2007134924 and WO2007134925 relate to control circuits that regulate operations of Peltier elements that are used in household appliances, particularly in laundry dryers.
The aim of the present invention is the realization of a safe and low cost control circuit that controls the Peltier elements used in household appliances.
The control circuit realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, is suitable for use in household appliances like laundry dryer, dishwasher wherein Peltier elements are operated for heating and drying purposes, comprises a rectifier that converts AC mains voltage into DC voltage by rectifying, a Peltier unit or Peltier module having Peltier elements connected in series or in parallel, a capacitor connected in parallel with the Peltier unit and a microcontroller that provides the Peltier unit to be operated with the required Peltier voltage, and an AC switching means, for example a triac, is connected to the AC mains voltage prior to the rectifier; and a DC switching means, for example an IGBT, that is connected in series with the capacitor and the Peltier unit connected in parallel and that switches the capacitor increases the charging rate of the capacitor by switching at least twice at each period of the mains voltage, thereby enabling the use of a capacitor having a lower capacitance value.
In an embodiment of the present invention, the Peltier voltage is controlled by means of a voltage measuring unit. The microcontroller, upon detecting that the AC mains voltage is higher or lower than the normal value, regulates the turn-on and turn-off durations of the DC switching means by receiving Peltier voltage feedback from the voltage measuring unit and provides the Peltier elements to be operated at constant power in variable mains voltage.
In another embodiment of the present invention, the Peltier current is measured by means of a first current sensor. The microcontroller monitors the Peltier current applied to the Peltier unit by means of the first current sensor and provides the power adjustment of the Peltier unit to be made.
In another embodiment of the present invention, the current switched by the DC switching means is measured by means of a second current sensor. The microcontroller detects the current conducted by the DC switching means by means of the second current sensor and turns off the DC switching means to protect it against excessive current values.
In the control circuit of the present invention, a low capacitance capacitor is used for feeding the Peltier unit and cost advantage is provided.
The control circuit realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
Figure 1 – is the schematic view of a control circuit that controls the Peltier elements.
Figure 2 – is the graphic showing the change in the voltage applied to the Peltier elements with respect to time.
Figure 3 – is the graphic of the change in the voltage applied to the Peltier elements with respect to time in another embodiment of the present invention.
The elements illustrated in the figures are numbered as follows:
  1. Control circuit
  2. Passive harmonic filter
  3. Rectifier
  4. Peltier unit
  5. Capacitor
  6. Microcontroller
  7. DC switching means
  8. Voltage measuring unit
  9. First current sensor
  10. Second current sensor
The control circuit (1), suitable for use in household appliances, comprises a passive harmonic filter (2) connected to the live wire at the AC mains voltage inlet and that decreases the amplitude of the high-value peak currents to make them close to the sine wave form of the AC mains voltage, a rectifier (3) that converts the AC mains voltage into DC voltage by rectifying, a Peltier unit (4) having one or more than one Peltier element (P) operated by the rectified voltage, a capacitor (5) connected in parallel with the Peltier unit (4), feeding the Peltier unit (4) by being charged and discharged with the rectified voltage and a microcontroller (6) that provides the Peltier unit (4) to be operated with the desired Peltier voltage (Vp) and Peltier current (Ip) by monitoring the AC mains voltage.
The control circuit (1) of the present invention comprises a DC switching means (7) that is connected in series with the capacitor (5) and the Peltier unit (4) connected in parallel and that switches the capacitor (5) by being switched to the turn-on and turn-off positions more than once at each period (T) of the rectified mains voltage by the microcontroller (6), thereby providing the capacitor (5) to be charged with a switching frequency higher than the mains voltage. The DC switching means (7) increases the charging rate of the capacitor (5) and allows the use of a low capacitance capacitor (5).
The microcontroller (6) monitors the AC mains voltage by means of a mains voltage measuring means (not shown in the figures), switches the DC switching means (7) to the turn-on and turn-off positions more than once at each period (T) of the mains voltage rectified in order to generate the Peltier voltage (Vp) and the Peltier current (Ip) to be supplied to the Peltier unit (4) and switches the DC switching means (7) to the turned-off position when the desired Peltier voltage (Vp) is attained. When the DC switching means (7) is in the turn-on position, the capacitor (5) is charged and when the DC switching means (7) is in the turn-off position, the capacitor (5) is discharged and the Peltier unit (4) is provided to be operated by being fed with the suitable Peltier voltage (Vp) (Figure 2). The DC switching means (7) allows the switching to be made as much as desired at each period (T) of the mains voltage and the Peltier unit (4) is provided to be supplied with the desired Peltier voltage (Vp) by increasing the charging rate of the capacitor (5). A capacitor (5) with lower capacitance than the similar embodiments is used and cost advantage is provided.
In an embodiment of the present invention, the microcontroller (6) provides the DC switching means (7) to switch twice at each period (T) of the mains voltage, that is at the beginning and the end of each period (T) of the mains voltage, thereby providing the capacitor (5) to be charged with a frequency twice the mains voltage frequency (Figure 2). For example, when the mains voltage frequency is 50 Hz, the capacitor (5) is charged with a 100 Hz frequency by the DC switching means (7).
In another embodiment of the present invention, the microcontroller (6) provides the DC switching means (7) to switch more than twice at each period (T) of the mains voltage and provides the Peltier unit (4) to be supplied with the constant Peltier voltage (Vp) of which the oscillation is almost completely stopped (Figure 3). For example, when the mains voltage frequency is 50Hz, the capacitor (5) is charged with a 20 kHz frequency by the DC switching means (7) that switches 400 times at each period (T) of the mains voltage (50x400 = 20,000).
In another embodiment of the present invention, the control circuit (1) comprises a voltage measuring unit (8) connected in parallel with the Peltier unit (4) and that measures the Peltier voltage (Vp) between the inlet and the outlet of the Peltier unit (4) and feedbacks to the microcontroller (6) (Figure 1).
The microcontroller (6) monitors the AC mains voltage and upon detecting that the AC mains voltage is higher or lower than normal value, regulates the turn-on and turn-off durations of the DC switching means (7) by receiving Peltier voltage (Vp) feedback from the voltage measuring unit (8), thus, provides the Peltier unit (4) to be operated with constant supply voltage (Vp) under variable mains voltage conditions. The operation of the DC switching means (7) is intervened by the microcontroller (6) in the mains voltage waviness, thereby compensating undesired power surge or power decrease in the Peltier unit (4), providing the power obtained from the Peltier unit (4) to remain constant.
In another embodiment of the present invention, the control circuit (1) comprises a first current sensor (9) connected in series with the Peltier unit (4), that measures the Peltier current (Ip) and feedbacks to the microcontroller (6) (Figure 1).
The microcontroller (6) monitors the Peltier current (Ip) applied to the Peltier unit (4) by means of the first current sensor (9) and when required, regulates the Peltier voltage (Vp) and hence the Peltier current (Ip) by changing the turn-on and turn-off durations of the DC switching means (7) and provides the Peltier unit (4) to be operated at the desired power level by adjusting the power level of the Peltier unit (4).
In another embodiment of the present invention, the control circuit (1) comprises a second current sensor (10) connected in series with the DC switching means (7), that measures the charging currents of the capacitor (5) switched by the DC switching means (7) and feedbacks to the microcontroller (6) (Figure 1).
The microcontroller (6) monitors the charging currents of the capacitor (5) switched by the DC switching means (7) by means of the second current sensor (10) and if the current exceeds the predetermined limit value, turns off the DC switching means (7) to protect it against excessive currents.
In an embodiment of the present invention, the DC switching means (7) is an IGBT (Insulated Gate Bipolar Transistor) (Figure 1). The microcontroller (6) controls the DC switching means (7) from the emitter (E) terminal and regulates the turn-on and turn-off durations of the DC switching means (7) and hence the Peltier voltage (Vp) required for operating the Peltier unit (4) by charging the capacitor (5).
In an embodiment of the present invention, the household appliance wherein the control circuit (1) is used, is a laundry dryer.
In another embodiment of the present invention, the household appliance wherein the control circuit (1) is used is a dishwasher.
In an embodiment of the present invention, the household appliance wherein the control circuit (1) is used, is a laundry washer/dryer.
In an embodiment of the present invention, the household appliance wherein the control circuit (1) is used, is a refrigerator.
In the control circuit (1) of the present invention, the DC switching means (7) charges the capacitor (5) with a frequency higher than the mains voltage frequency and the Peltier voltage (Vp) supplying the Peltier unit (4) is provided to remain constant by increasing the charging rate of the capacitor (5). The value of the current charging the capacitor (5) decreases, thus a standard low capacitance capacitor (5) can be used and cost advantage is provided. Since the DC switching means (7) charging the capacitor (5) switches a low value current, the cost of the control circuit (1) is decreased by selecting a low-current-conducting switching means. The DC switching means (7) limits the peak currents drawn from the mains as well and a less-precise, low cost passive harmonic filter (2) can be used.
It is to be understood that the present invention is not limited by the embodiments disclosed above and a person skilled in the art can easily introduce different embodiments. These should be considered within the scope of the protection postulated by the claims of the present invention.

Claims (14)

  1. A control circuit (1), suitable for use in household appliances, comprising a rectifier (3) that converts the AC mains voltage into DC voltage by rectifying, a Peltier unit (4) having one or more than one Peltier element (P) operated by the rectified voltage, a capacitor (5) connected in parallel with the Peltier unit (4), feeding the Peltier unit (4) by being charged and discharged with the rectified voltage and a microcontroller (6) that provides the Peltier unit (4) to be operated with the desired Peltier voltage (Vp) by monitoring and regulating the AC mains voltage, characterized by a DC switching means (7) that is connected in series with the capacitor (5) and the Peltier unit (4) connected in parallel and that switches the capacitor (5) by being switched to the turn-on and turn-off positions more than once at each period (T) of the rectified mains voltage by the microcontroller (6), thereby providing the capacitor (5) to be charged with a switching frequency higher than the mains voltage.
  2. A control circuit (1) as in Claim 1, characterized by the microcontroller (6) that provides the DC switching means (7) to switch twice at each period (T) of the mains voltage, thereby providing the capacitor (5) to be charged with a frequency twice the mains voltage frequency.
  3. A control circuit (1) as in Claim 1, characterized by the microcontroller (6) that provides the DC switching means (7) to switch more than twice at each period (T) of the mains voltage, thereby providing the Peltier unit (4) to be supplied with constant Peltier voltage (Vp).
  4. A control circuit (1) as in any one of the above claims, characterized by a voltage measuring unit (8) connected in parallel with the Peltier unit (4) and that measures the Peltier voltage (Vp) between the inlet and the outlet of the Peltier unit (4) and feedbacks to the microcontroller (6).
  5. A control circuit (1) as in Claim 4, characterized by the microcontroller (6) that regulates the turned-on and turned-off durations of the DC switching means (7) by receiving Peltier voltage (Vp) feedback from the voltage measuring unit (8) upon detecting that the DC mains voltage is higher or lower than normal value.
  6. A control circuit (1) as in any one of the above claims, characterized by a first current sensor (9) connected in series with the Peltier unit (4), that measures the Peltier current (Ip) and feedbacks to the microcontroller (6).
  7. A control circuit (1) as in Claim 6, characterized by the microcontroller (6) that monitors the Peltier current (Ip) applied to the Peltier unit (4) by means of the first current sensor (9) and regulates the turn-on and turn-off durations of the DC switching means (7) to make the power adjustment of the Peltier unit (4).
  8. A control circuit (1) as in any one of the above claims, characterized by a second current sensor (10) connected in series with the DC switching means (7), that measures the charging currents of the capacitor (5) switched by the DC switching means (7) and feedbacks to the microcontroller (6).
  9. A control circuit (1) as in Claim 8, characterized by the microcontroller (6) that monitors the currents switched by the DC switching means (7) by means of the second current sensor (10) and if the current exceeds the predetermined limit value, turns off the DC switching means (7).
  10. A control circuit (1) as in any one of the above Claims, characterized by the DC switching means (7) which is a an IGBT (Insulated Gate Bipolar Transistor).
  11. A control circuit (1) as in any one of the above Claims, characterized in that the household appliance wherein the control circuit (1) is used is a laundry dryer.
  12. A control circuit (1) as in any one of the Claims 1 to 10, characterized in that the household appliance wherein the control circuit (1) is used is a dishwasher.
  13. A control circuit (1) as in any one of the Claims 1 to 10, characterized in that the household appliance wherein the control circuit (1) is used is a laundry washer/dryer.
  14. A control circuit (1) as in any one of the Claims 1 to 10, characterized in that the household appliance wherein the control circuit (1) is used is a refrigerator.
PCT/EP2012/073635 2011-12-26 2012-11-26 Peltier element control circuit for household appliances WO2013098014A2 (en)

Applications Claiming Priority (2)

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TRA2011/12961 2011-12-26
TR201112961 2011-12-26

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WO2013098014A3 WO2013098014A3 (en) 2013-12-27

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013226828A1 (en) * 2013-12-20 2015-06-25 BSH Hausgeräte GmbH Home appliance with an electrical consumer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007125013A1 (en) 2006-05-03 2007-11-08 BSH Bosch und Siemens Hausgeräte GmbH Circuit arrangement and method for controlling a drying process of a domestic appliance for doing laundry
WO2007125012A1 (en) 2006-05-03 2007-11-08 BSH Bosch und Siemens Hausgeräte GmbH Circuit arrangement and method for operating a peltier module of a heat pump of a domestic appliance
WO2007134924A1 (en) 2006-05-18 2007-11-29 BSH Bosch und Siemens Hausgeräte GmbH Circuit arrangement and method for operating a peltier module on a heat pump in a domestic appliance
WO2007134925A1 (en) 2006-05-18 2007-11-29 BSH Bosch und Siemens Hausgeräte GmbH Circuit arrangement and method for operating a peltier module of a heat pump in a domestic appliance

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3077744B2 (en) * 1997-07-14 2000-08-14 アイシン精機株式会社 Peltier device power supply
CN102483633A (en) * 2009-09-25 2012-05-30 松下电器产业株式会社 Panasonic elec works co ltd

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007125013A1 (en) 2006-05-03 2007-11-08 BSH Bosch und Siemens Hausgeräte GmbH Circuit arrangement and method for controlling a drying process of a domestic appliance for doing laundry
WO2007125012A1 (en) 2006-05-03 2007-11-08 BSH Bosch und Siemens Hausgeräte GmbH Circuit arrangement and method for operating a peltier module of a heat pump of a domestic appliance
WO2007134924A1 (en) 2006-05-18 2007-11-29 BSH Bosch und Siemens Hausgeräte GmbH Circuit arrangement and method for operating a peltier module on a heat pump in a domestic appliance
WO2007134925A1 (en) 2006-05-18 2007-11-29 BSH Bosch und Siemens Hausgeräte GmbH Circuit arrangement and method for operating a peltier module of a heat pump in a domestic appliance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013226828A1 (en) * 2013-12-20 2015-06-25 BSH Hausgeräte GmbH Home appliance with an electrical consumer

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