Optimized motion and location of intense microwave fields within a heating system
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H05B-006/68
H05B-006/80
H05B-006/78
H01L-021/67
H05B-006/70
출원번호
US-0799684
(2013-03-13)
등록번호
US-9179505
(2015-11-03)
발명자
/ 주소
Kimrey, Jr., Harold Dail
출원인 / 주소
Microwave Materials Technologies, Inc.
대리인 / 주소
Hovey Williams LLP
인용정보
피인용 횟수 :
0인용 특허 :
42
초록▼
A method and system for heating a plurality of articles is provided. The method includes discharging microwave energy into a microwave chamber and passing a plurality of articles through the heating zone. At least a portion of the microwave energy discharged into the heating zone may first be phase
A method and system for heating a plurality of articles is provided. The method includes discharging microwave energy into a microwave chamber and passing a plurality of articles through the heating zone. At least a portion of the microwave energy discharged into the heating zone may first be phase shifted using one or more phase shifting devices. One embodiment of a rotatable phase shifting device is also provided and includes an elongated fixed member disposed proximate a rotatable housing. The phase shifting device employed by the microwave heating system is configured such that the ratio of the article residence time in the heating zone to the phase shifting rate is at least about 4:1. Rotatable phase shifting devices, or variable phase short circuits, as described herein can also be used in other applications, such as, for example, as impedance or frequency tuning devices.
대표청구항▼
1. A variable phase short circuit device for use in a microwave heating system, said device comprising: a fixed section defining a first substantially rectangular opening; anda rotatable section comprising a housing and a plurality of spaced-apart, substantially parallel plates received in said hous
1. A variable phase short circuit device for use in a microwave heating system, said device comprising: a fixed section defining a first substantially rectangular opening; anda rotatable section comprising a housing and a plurality of spaced-apart, substantially parallel plates received in said housing,wherein said housing comprises opposite first and second ends, wherein said first end defines a second opening adjacent to said first opening of said fixed section, wherein each of said plates is coupled to said second end of said housing and extends generally toward said first and said second openings,wherein said rotatable section is configured to be rotated relative to said fixed section on an axis of rotation that extends through said first and said second openings. 2. The device of claim 1, wherein said housing has a length (L1), a width (W1) and a depth (D1), wherein said variable phase short circuit is configured to pass microwave energy having a wavelength (λ) from said first opening to said housing, wherein at least one of W1 and D1 is greater than 0.5λ. 3. The device of claim 2, wherein both W1 and D1 are less than 1λ. 4. The device of claim 2, wherein the ratio of W1:D1 is less than 1.5:1. 5. The device of claim 1, wherein said variable phase short circuit is configured to pass microwave energy having a wavelength (λ) from said first opening to said housing, wherein adjacent plates within said housing are spaced apart by no more than 0.1λ. 6. The device of claim 1, wherein each of said plates presents a distal end having a first surface area facing toward said first and second openings, wherein said second end of said housing defines an exposed inner surface area located between said plates and facing toward said first and second openings, wherein the ratio of the sum of the first surface areas of the distal ends of said plates to the exposed surface area of said second end of said housing is at least 0.5:1 and not more than 2:1. 7. The device of claim 1, wherein said variable phase short circuit is configured to pass microwave energy having a wavelength (λ) from said first opening into said housing, wherein said plates extend toward said first side for a distance of at least 0.25λ. 8. The device of claim 1, wherein said first opening has a length (L2), a width (W2) and a depth (D2), wherein the ratio of W2:D2 is greater than 1.25:1. 9. The device of claim 8, wherein said housing has a length (L1), a width (W1), and a depth (D1), wherein W1 and W2 are substantially equal. 10. The device of claim 9, wherein the ratio of W1:D1 is less than 1.2:1. 11. The device of claim 1, further comprising a microwave choke disposed proximate said first and second openings and configured to inhibit leakage of microwave energy from between said fixed and rotatable sections. 12. The device of claim 1, further comprising an actuator for rotating said rotatable section at a speed of at least 50 revolutions per minute (rpm). 13. The device of claim 1, wherein said rotatable section is configured to be adjusted manually via rotation to a desired position. 14. The device of claim 1, wherein said variable phase short circuit is configured to be connected to a coupler and utilized as a phase shifting device in a microwave system for heating a plurality of articles.
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