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US4915162A
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US
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Method and apparatus for heater current control for automatic vending machine
Assignee: Sanden Corp
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Filing: 1989-08-03
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Granted: 1990-04-10
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Expires: 2009-08-03
Abstract
Abstract In an automatic vending machine having a heater for boiling water, and a motor-driven compressor for refrigeration, a flow of current to the heater is stopped when the compressor is started. On the other hand, while the compressor is being operated stably, the current flowing in the heater is controlled in phase such that the sum of an effective current flowing in the compressor and an effective current flowing in the heater does not exceed a predetermined value.
Inventors
- 👤 Yasuhiro Ikura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:10
CPC Classifications
G; G07; G07F; G07F13/00; G07F9/00; G07F9/10; G07F9/105; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; G07F13/06; G07F13/065; Y; Y10; Y10S; Y10S165/00; Y10S165/918
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
116 words
A method for controlling a heater current in an automatic vending machine including a heater, and a motor-driven compressor for refrigeration, characterized by: detecting an amount of current flowing in said compressor; determining when said compressor is being started, based on the amount of detected current flowing in said compressor; terminating a flow of current to said heater when an effective value of the detected current flowing in said compressor exceeds a predetermined value; and phase controlling the current flowing in said heater when said compressor is being operated stably, such that the sum of an effective current flowing in said compressor and an effective current flowing in said heater does not exceed a predetermined value.
Claim 2
Independent Claim
116 words
A method for controlling a heater current in an automatic vending machine including a heater, and a motor-driven compressor for refrigeration, characterized by: detecting an amount of current flowing in said compressor; determining when said compressor is being started, based on the amount of detected current flowing in said compressor; terminating a flow of current to said heater when an effective value of the detected current flowing in said compressor exceeds a predetermined value; and phase controlling the current flowing in said heater when said compressor is being operated stably, such that the sum of an effective current flowing in said compressor and an effective current flowing in said heater does not exceed a predetermined value.
Claim 3
Independent Claim
121 words
An apparatus for controlling a heater current in an automatic vending machine including a heater and a motor driven compressor for refrigeration, comprising: means for detecting the amount of current flowing in said compressor; means for determining when said compressor is being started based on the amount of detected current flowing in said compressor; means for terminating a flow of current to said heater when the amount of current flowing in said compressor exceeds a predetermined amount; and means for phase controlling the current flowing in said heater when said compressor is being operated stably such that the sum of an effective current flowing in said compressor and an effective current flowing in said heater does not exceed a predetermined value.
Claim 4
Independent Claim
121 words
An apparatus for controlling a heater current in an automatic vending machine including a heater and a motor driven compressor for refrigeration, comprising: means for detecting the amount of current flowing in said compressor; means for determining when said compressor is being started based on the amount of detected current flowing in said compressor; means for terminating a flow of current to said heater when the amount of current flowing in said compressor exceeds a predetermined amount; and means for phase controlling the current flowing in said heater when said compressor is being operated stably such that the sum of an effective current flowing in said compressor and an effective current flowing in said heater does not exceed a predetermined value.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-09 | 1993-10-09 | 1994-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-09 | 1997-10-09 | 1998-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-09 | 2001-10-09 | 2002-04-10 | $7700.00 | Window Closed / Lapsed |