Refrigeration system energy controller
OwnerDonald L. Bendiksoninventor
Life of this patent
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Abstract
A refrigeration system energy controller 10 for controlling the on-Off cycle time of a refrigeration compressor motor 25. A pressure-sensing device 27 senses high and low pressure thresholds in the refrigeration low-side suction line, the high threshold event being converted to a first digital voltage that energizes the refrigeration compressor motor 25, and the low threshold event being converted to a second digital voltage that produces a fixed duration timing signal setting the minimum time duration of the compressor motor 25 on-Off cycle.
Claims9
A refrigeration system energy controller for controlling the on-off cycle time of a refrigeration compressor motor, comprising:
- (a) a pressure-voltage converter that accepts an input from a pressure-sensing means, the converter producing a first electrical voltage when the pressure sensed by the pressure-sensing means is greater than a high pressure threshold, and producing a second electrical voltage when the pressure sensed by the pressure-sensing means is lower than the low pressure threshold;
- (b) a logic timer that produces a timing signal for a fixed time duration, the timer initiating the timing signal when the second electrical voltage is present and the timing signal is absent;
- and
- (c) a logic switch that produces a two-valued electrical resistance path for completion of a compressor motor energization circuit, the value of the electrical resistance path being sufficiently low to assure energization of the motor when the first electrical voltage is present, and the value of the electrical resistance path being sufficiently high to prevent energization of the motor when the second electrical voltage is present and the timing signal is absent.
A refrigeration system energy controller for controlling the on-off cycle time of a refrigeration compressor motor, comprising:
- (a) a temperature-voltage converter that accepts an input from a temperature-sensing means, the converter producing a first electrical voltage when the temperature sensed by the temperature-sensing means is greater than a high temperature threshold, and producing a second electrical voltage when the temperautre sensed by the temperature-sensing means is lower than the low temperature threshold;
- (b) a logic timer that produces a timing signal for a fixed time duration, the timer initiating the timing signal when the second electrical voltage is present and the timing signal is absent;
- and
- (c) a logic switch that produces a two-valued electrical resistance path for completion of a compressor motor energization circuit, the value of the electrical resistance path being sufficiently low to assure energization of the motor when the first electrical voltage is present, and the value of the electrical resistance path being sufficiently high to present energization of the motor when the second electrical voltage is present and the timing signal is absent.
Dependencies are inferred from the claim text.