IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0586608
(2009-09-23)
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등록번호 |
US-8528352
(2013-09-10)
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발명자
/ 주소 |
- Kawamukai, Takatomo
- Fukukura, Kazutoyo
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
2 |
초록
▼
The defrost timer is typically provided to remove frost on an evaporator in a refrigerator. The defrost timer includes a circuit board, a first terminal, a second terminal, a third terminal, a fourth terminal, a switching unit, a first AC line, a second AC line, a third AC line and a fourth AC line.
The defrost timer is typically provided to remove frost on an evaporator in a refrigerator. The defrost timer includes a circuit board, a first terminal, a second terminal, a third terminal, a fourth terminal, a switching unit, a first AC line, a second AC line, a third AC line and a fourth AC line. The first AC line is provided on the circuit board and connects the first terminal and the switching unit. The second AC line is provided on the circuit board and connects the second terminal and the switching unit. The third AC line is provided on the circuit board and connects the third terminal and the switching unit. The fourth AC line is provided on the circuit board and connects the fourth terminal and the switching unit. Distance between the third AC line and the fourth AC line is at least 5 mm.
대표청구항
▼
1. A defrost timer for a refrigerator comprising: a circuit board;a first terminal located on the circuit board and coupled to one position of an alternative current source;a second terminal located on the circuit board and coupled to a heater of the refrigerator;a third terminal located on the circ
1. A defrost timer for a refrigerator comprising: a circuit board;a first terminal located on the circuit board and coupled to one position of an alternative current source;a second terminal located on the circuit board and coupled to a heater of the refrigerator;a third terminal located on the circuit board and coupled to other position of the alternative current source;a fourth terminal located on the circuit board and coupled to a compressor of the refrigerator;a switching unit selectively coupled between the first terminal and the fourth terminal;a first AC line provided on the circuit board coupling the first terminal and the switching unit;a second AC line provided on the circuit board coupling the second terminal and the switching unit;a third AC line provided on the circuit board coupling the third terminal and the switching unit; anda fourth AC line provided on the circuit board coupling the fourth terminal and the switching unit,a CPU for controlling the switching unit; anda flash memory for storing data outputted from the CPU,wherein the CPU is configured to: write periodically a value reflecting a running time of the compressor into the flash memory, andcontrol the switching unit and turn off the compressor when the value reaches a predetermined threshold, andwherein the distance between the third AC line and the fourth AC line is at least 5 mm. 2. A defrost timer for a refrigerator comprising: a switching unit selectively coupled to a compressor of the refrigerator;a timer for counting a time;a CPU for controlling the switching unit according to the time counted by the timer; anda flash memory for storing data outputted from the CPU, wherein the CPU is configured to: write periodically a value reflecting the time counted by the timer into the flash memory, andcontrol the switching unit and turn off the compressor when the value reaches a predetermined threshold, andwherein the flash memory has a size of 1 kilobyte to 1 megabyte; wherein the CPU is configured to write periodically the value reflecting the time counted by the timer into the flash memory at an address that is different from an address where the value is written last time. 3. The defrost timer of claim 2, wherein the CPU is configured to write into the flash memory at a predetermined interval. 4. The defrost timer of claim 2, further comprising a time input unit for receiving an input corresponding to a current time and transmitting the input to the CPU, wherein the CPU is configured to adjust the value which reflects the time counted by the timer in response to the input. 5. The defrost timer of claim 4, wherein the time input unit comprises a switch where the input corresponding to the current time is received by pressing the switch for a number of times, and wherein the number of times the switch is pressed is smaller than a numeral represented by time in hour unless the numeral represented by time is 0. 6. The defrost timer of claim 2, wherein the CPU is configured to write periodically the value reflecting the time counted by the timer into the flash memory with an interval of 2 minutes to 2 hours. 7. A defrost timer for a refrigerator comprising: a switching unit selectively coupled to a compressor of the refrigerator or a heater of the refrigerator;a CPU for controlling the switching unit; anda flash memory for storing data outputted from the CPU, wherein the CPU is configured to: write periodically a value reflecting a running time of the compressor into the flash memory, andcontrol the switching unit and turn off the compressor or the heater when the value reaches a predetermined threshold, andwherein the flash memory has a size of 1 kilobyte to 1 megabyte; wherein the CPU is configured to write periodically the value reflecting running time of the compressor into the flash memory at an address that is different from an address where the value is written last time. 8. The defrost timer of claim 7, wherein the CPU is configured to write the value reflecting the running time of the compressor into the flash memory while the compressor is on, and wherein a current to the CPU is configured to be off when the line to the compressor is on at the switching unit while the compressor is off; and wherein the CPU is configured to retrieve the value from the flash memory after the compressor is turned on. 9. The defrost timer of claim 7, further comprises at least two flash memories, wherein the CPU is configured to write the value reflecting the running time of the compressor: at an address in one of the flash memories that is different from an address where the value is written last time, andinto the same flash memory as long as the same flash memory allows the CPU to rewrite. 10. The defrost timer of claim 7, wherein the CPU is configured to write periodically the value reflecting running time of the compressor into the flash memory with an interval of 2 minutes to 2 hours. 11. A refrigerator having a compressor, a condenser, an evaporator to compress, condense and evaporate a coolant, a thermostat coupled in series to the compressor where the thermostat selectively couples an alternative current source to the compressor, an optional heater to warm the evaporator, and a defrost timer coupled in series to the compressor and the thermostat, wherein said defrost timer is the defrost timer recited in claim 7, and wherein current to the defrost timer is arranged to be off while the current to the compressor is off by the thermostat. 12. A defrost timer for a refrigerator comprising: a switching unit selectively coupled to a compressor of the refrigerator;a timer for counting a time;a CPU for controlling the switching unit according to the time counted by the timer;a flash memory for storing data outputted from the CPU, wherein the CPU is configured to: write periodically a value reflecting the time counted by the timer into the flash memory, andcontrol the switching unit and turn off the compressor when the value reaches a predetermined threshold; anda time input unit for receiving an input corresponding to a current time and transmitting the input to the CPU, wherein the CPU is configured to adjust the value which reflects the time counted by the timer in response to the input. 13. The defrost timer of claim 12, wherein the time input unit comprises a switch where the input corresponding to the current time is received by pressing the switch for a number of times, and wherein the number of times the switch is pressed is smaller than a numeral represented by time in hour unless the numeral represented by time is 0. 14. The defrost timer of claim 12, wherein the CPU is configured to write periodically the value reflecting the time counted by the timer into the flash memory with an interval of 2 minutes to 2 hours. 15. The defrost timer of claim 12, wherein the CPU is configured to write periodically the value reflecting the time counted by the timer into the flash memory at an address that is different from an address where the value is written last time.
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