[특허]Control circuitry for thermoelectric cooler

[미국특허] Control circuitry for thermoelectric cooler 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25B-021/02 G08B-021/00
출원번호	US-0102447 (1979-12-11)
발명자 / 주소	Reed Michael A. (Tucson AZ)
출원인 / 주소	Koolatron Industries, Ltd. (Barrie CAX 03)
인용정보	피인용 횟수 : 38 인용 특허 : 5

초록 ▼

A portable cooler includes a urethane foam shell having a storage compartment and fan recess. An internal heat exchanger is mounted to a wall of the storage compartment and conducts heat out of the storage compartment by means of a thermally conductive block to an external heat exchanger mounted in the fan recess. An electric fan mounted in the fan recess blows outside air through fins of the external heat exchanger. A grill covers the fan recess. A solid state thermoelectric device is disposed between the external heat exchanger and the thermally conductive block. A control circuit includes a first thermistor which senses the temperature of the internal heat exchanger. A comparator having one input coupled to a temperature control reostat and another input coupled to the first thermistor controls a switch circuit which connects the terminals of the thermoelectric device and the terminals of the fan motor to a supply voltage conductor. A manual switch can be actuated to reverse the direction of current through the thermoelectric device, causing heating, rather than cooling, of the storage compartment. A protective circuit senses the temperature of a second thermistor located near the external heat exchanger and prevents the switch circuit from energizing the thermoelectric device and the fan motor if the external exchanger becomes overheated. An under-voltage indicator circuit causes a light emitting diode to be turned on if a proper polarity and level of battery voltage is applied to the supply voltage conductor, and causes the light emitting diode to blink if the battery voltage is less than a predetermined level.

대표청구항 ▼

In a thermoelectric refrigeration unit including i. a storage compartment, ii. a fan compartment for housing a fan and an external heat exchanger, iii. an internal heat exchanger located in the storage compartment, and iv. thermoelectric means for causing heat to flow from one to the other of the internal and external heat exchangers, said thermoelectric means having a first and second terminal, control circuitry comprising in combination: a. first thermister circuit means for producing a first voltage representative of the actual temperature in the storage compartment; b. first circuit means for producing a second voltage representative of a desired temperature in the storage compartment; c. second circuit means coupled to said first thermister circuit means and said first circuit means for producing a third voltage if said second voltage exceeds said first voltage and producing a fourth voltage if said second voltage does not exceed said first voltage, said third and fourth voltages being at an output of said second circuit means; d. first switching means coupled to the output of said second circuit means and the first terminal of said thermoelectric means for i. electrically coupling the thermoelectric means to a voltage supply conductor to cause a current to flow into the first terminal of the thermoelectric means in response to said third voltage; and ii. electrically decoupling the first terminal of the thermoelectric means from said voltage supply conductor in response to said fourth voltage; e. third circuit means for causing said first switching means to prevent said first terminal of said thermoelectric means from being electrically coupled to said supply voltage conductor if a temperature in said fan compartment exceeds a predetermined level, said third circuit means being disposed in said fan compartment, wherein said thermoelectric refrigeration unit includes a pair of terminals for electrical connection to a DC voltage source, said first, second and third circuit means being coupled between said pair of terminals to effect energization of said first, second, and third circuit means; f. fourth circuit means for producing a first signal level if the voltage of said DC voltage source exceeds a predetermined level and for producing a signal which switches between said first signal level and a second signal level at a predetermined rate if the voltage of said DC voltage source is less than said predetermined level, said fourth circuit means including i. resistive divider means coupled between said pair of terminals for producing a fifth voltage representative of said voltage of said DC voltage source, ii. zener diode means coupled to one of said pair of terminals for establishing a reference voltage, iii. comparator means coupled to said resistive divider means and said zener diode means for comparing said fifth voltage with said reference voltage, said comparator means producing a first signal level when said fifth voltage is less than said reference voltage, said comparator means having an output and an input, iv. feedback circuit means coupled between said output and said input for producing a feedback signal to said input, and v. capacitive circuit means coupled to said feedback circuit means and responsive to said feedback signal for producing a periodic signal which varies at said predetermined rate on said input in response to said first signal level, said periodic signal causing said comparator means to switch the voltage level on said output between said first and second levels, said comparator means maintaining the voltage level of said output at said first level when said fifth signal level exceeds said reference voltage; and g. indicating means coupled to said output for producing a perceivable constant indication if the voltage of said DC source exceeds said predetermined level and a perceivable indication which varies at said predetermined rate if the voltage of said DC source is less than said predetermined level.

이 특허에 인용된 특허 (5) 인용/피인용 타임라인 분석

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이 특허를 인용한 특허 (38) 인용/피인용 타임라인 분석

Woods, Mark C., Battery thermal drawer for ventilated cabinets.
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Lofy, John, Climate controlled beverage container.
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Adelbert M. Gillen, Compact thermoelectric cooling system.
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Adelbert M. Gillen, Compact thermoelectric cooling system.
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Ishmael William, Control system.
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Lofy, John, Cooling system for container in a vehicle.
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DeVilbiss Roger S. (Dallas TX) Quisenberry Tony M. (Highland Village TX) Powell Harry C. (Shipman VA), Current control circuit for improved power application and control of thermoelectric devices.
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Albayrak, Hasan Gökcer; Grunert, Klaus; Ruhm, Reinhardt; Seiffert, Edmund; Steffens, Günter; Stolze, Andreas, Heating apparatus having at least two thermoelectric modules which are connected in series.
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Gaddis Mark W. (Albuquerque NM) Durkin Peter S. (Albuquerque NM) Moeller Charles E. (Albuquerque NM), High efficiency thermal electric cooler driver.
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Rajasubramanian Sathya ; DeVilbiss Roger S. ; Dedmon Thomas C. ; Quisenberry Tony M., Hybrid air conditioning system and a method therefor.
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Rajasubramanian Sathya ; DeVilbiss Roger S. ; Dedmon Thomas C. ; Quisenberry Tony M. ; Borman Ronald ; Boger ; Jr. Allen D., Hybrid air conditioning system and a method therefor.
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Quisenberry, Tony, Method and system for maximizing the thermal properties of a thermoelectric cooler and use therewith in association with hybrid cooling.
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Quisenberry, Tony, Method and system for maximizing thermal properties of a thermoelectric cooler and use therewith in association with hybrid cooling.
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Evans, Jeremy Thomas, Method for cooling automated storage library media using thermoelectric cooler.
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Cauchy, Charles J., Motor vehicle temperature controlled compartment.
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Maslaney Michael J. (Atlanta GA) Andreasen Dinal S. (Marretta GA) Brown Clifford D. (Atlanta GA), Optical signal power measurement method and apparatus.
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DeVilbiss Roger S. (Dallas TX) Quisenberry Tony M. (Highland Village TX) Powell ; Jr. Harry C. (Shipman VA), Power control circuit for improved power application and temperature control of low voltage thermoelectric devices.
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Hare Harold L. (Duncan OK) Bell John M. (Moore OK), Refrigeration system alarm device.
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Lu, Qiao; Godecker, William, Refrigeration systems and methods for connection with a vehicle's liquid cooling system.
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Jung, Wonyeong; Youn, Deokhyun, Refrigerator.
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Jung, Wonyeong; Youn, Deokhyun, Refrigerator with vacuum insulation housing a heat interchanger.
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Grisham, John N.; Meadows, Michael M.; Perry, Leslie Wayne; Sallwasser, Alan J., Reliable outdoor instrument cooling system.
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McGann, Ryan, Solar-powered refrigerated container.
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Lofy, John; Marquette, David, System and method for thermoelectrically cooling inductive charging assemblies.
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Lofy, John; Marquette, David, Systems and methods for thermoelectrically cooling inductive charging stations.
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Lofy, John; Marquette, David, Systems and methods for thermoelectrically cooling inductive charging stations.
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DeVilbiss Roger S. (Dallas TX) Powell Harry C. (Shipman VA), Temperature controller for low voltage thermoelectric cooling or warming boxes and method therefor.
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Nakamura, Ken; Kanou, Hisashi; Yukawa, Noriaki; Mitsuyasu, Toshio, Temperature maintaining case.
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Cesar Santacruz-Olivares MX, Thermoelectric cooling stirrer.
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Charles W. Jarvis ; Johannes Le, Thermoelectric heated food service cart.
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Quisenberry, Tony; McSpadden, Sam K.; Polser, Christopher Alan; Balachandran, Niran, Vehicle air comfort system and method.
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Quisenberry, Tony; McSpadden, Sam K.; Polser, Christopher Alan; Balachandran, Niran, Vehicle air comfort system and method.
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Quisenberry, Tony; McSpadden, Sam K.; Polser, Christopher Alan; Balachandran, Niran, Vehicle air comfort system and method.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Control circuitry for thermoelectric cooler 원문보기