Air purifier and air purification method
AssigneeKoninklijke Philips N.V.
InventorsRuifeng Xue, Rui Ke, Shan Zhu, Shuang Chen
Life of this patent
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Abstract
An air purifier comprise a gas filter between an upstream air flow and a downstream air flow and a concentration sensor comprising a first electrode and a second electrode, the first electrode being exposed to the upstream air flow and the second electrode exposed to the downstream air flow, the concentration sensor providing an output signal based on the difference in concentrations of a target gas at the first and second electrodes. The output signal is processed to determine information relating to the condition of the gas filter.
Claims20
An air purifier, comprising:
- a gas filter located between an upstream air flow and a downstream air flow;
- a feed branch forming a first side channel from an inlet side of the main flow channel, the feed branch leading to a first side of the concentration sensor;
- a return branch forming a second side channel from an outlet side of the main flow channel leading to a second side of the concentration sensor;
- the first side channel and the second side channel being separated by the concentration sensor;
- the concentration sensor comprising a first electrode and a second electrode, the first electrode being exposed to the upstream air flow in the first side channel and the second electrode exposed to the downstream air flow in the second side channel,
- wherein the concentration sensor further comprises an electrolyte surrounded by the first and second electrodes to form an oxygen gas concentration cell, and wherein the concentration sensor is configured for providing an output signal based on the difference in concentrations of a target gas at the first and second electrodes;
- and
- a processor configured for processing the output signal to determine information relating to the condition of the gas filter.
A method for determining information relating to the condition of a gas filter, comprising:
- performing gas filtering between an upstream air flow and a downstream air flow in a main channel using a gas filter;
- sensing a concentration difference of a target between the upstream side and the downstream side using a concentration sensor located in a side channel, the concentration sensor comprising a first electrode and a second electrode, the first electrode being exposed to the upstream air flow and the second electrode exposed to the downstream air flow, and wherein the concentration sensor comprises an electrolyte located between the first and second electrodes;
- and
- processing the concentration difference to determine information relating to the condition of the gas filter.
An air purifier, comprising:
- a gas filter located between an upstream air flow and a downstream air flow in a main flow channel;
- a concentration sensor comprising a first electrode and a second electrode, the first electrode being exposed to the upstream air flow and the second electrode exposed to the downstream air flow,
- wherein the concentration sensor is arranged in a side channel coupled to the main channel at an inlet side and at an outlet side,
- wherein the concentration sensor comprises a solid electrolyte located between the first and second electrodes, and wherein the concentration sensor is configured for providing an output signal based on the difference in concentrations of a target gas at the first and second electrodes;
- and
- a processor configured for processing the output signal to determine information relating to the condition of the gas filter.
Dependencies are inferred from the claim text.