Air-conditioner control
AssigneeDometic Sweden AB
InventorsJarrod Williamson, Louis Liu, Braddon Slater
Life of this patent
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Abstract
The invention provides an air-conditioner for maintaining a temperature of a conditioned space at or near a set temperature. The air-conditioner comprises at least one rotating or reciprocating element adapted to rotate or reciprocate at a variable frequency. The variable frequency including one or more nuisance frequencies at which vibration or noise within the air-conditioner or the conditioned space causes a nuisance. A processor (30) programmed to control variation of the variable frequency in response to operational requirement. The processor is configured to operate the at least one rotating or reciprocating element so as to substantially exclude operation at the one or more nuisance frequencies.
Claims16
An air-conditioner for maintaining a temperature of a conditioned space at or near a set temperature, the air-conditioner comprising:
- at least one rotating or reciprocating element configured to rotate or reciprocate at a variable frequency, the variable frequency including one or more nuisance frequencies being frequencies at which vibration or noise within the air-conditioner or the conditioned space causes a nuisance;
- and
- a processor programmed to:
- during a nuisance frequency determination mode, receive input by a user of an observation or measurement and,
- control variation of the variable frequency in response to operational requirements, wherein the processor:
- computes a target frequency for sustained operation according to the operational requirements;
- computes a revised target frequency by increasing or decreasing the target frequency if required to avoid the one or more nuisance frequencies;
- and
- operates the at least one rotating or reciprocating element at the revised target frequency;
- wherein the processor is configured to increase the target frequency if required to avoid the one or more nuisance frequencies if a rate of change of temperature difference from a temperature set point indicates more power is required, and to decrease the target frequency if required to avoid the one or more nuisance frequencies if the rate of change of temperature difference from a temperature set point indicates less power is required;
- wherein the processor is configured to operate the at least one rotating or reciprocating element so as to substantially exclude operation at the one or more nuisance frequencies.
A method of reducing a nuisance caused by an air-conditioner, the air-conditioner being configured to maintain a temperature of a conditioned space at or near a set temperature, the air-conditioner comprising:
- rotating or reciprocating, by at least one rotating or reciprocating element, at a variable frequency, the variable frequency including one or more nuisance frequencies being frequencies at which vibration or noise within the air-conditioner or the conditioned space causes a nuisance;
- and
- identifying a nuisance frequency by a user or by a measurement during a nuisance frequency determination mode;
- controlling, by a processor, variation of the variable frequency in response to operational requirements;
- computing, by the processor, a target frequency for sustained operation according to the operational requirements;
- computing, by the processor, a revised target frequency by increasing or decreasing the target frequency if required to avoid the one or more nuisance frequencies;
- and
- operating the at least one rotating or reciprocating element at the revised target frequency;
- increasing the target frequency if required to avoid the one or more nuisance frequencies if a rate of change of temperature difference from a temperature set point indicates more power is required, and decreasing the target frequency if required to avoid the one or more nuisance frequencies if the rate of change of temperature difference from a temperature set point indicates less power is required;
- operating the at least one rotating or reciprocating element so as to substantially exclude operation at the one or more nuisance frequencies.
Dependencies are inferred from the claim text.