Formaldehyde concentration measurement method and apparatus, and air purifier

Patent metadata

Field	Value
Publication number	US-2022178894-A1
Application number	US-201917601901-A
Country	US
Kind code	A1
Filing date	Dec 18, 2019
Priority date	Jun 21, 2019
Publication date	Jun 9, 2022
Grant date	—

Abstract

Formaldehyde concentration measurement method and apparatus, and an air purifier. The formaldehyde concentration measurement method includes: determining an initial formaldehyde concentration value measured by a formaldehyde sensor; acquiring temperature information and/or humidity information of an environment surrounding the formaldehyde sensor; determining a formaldehyde concentration compensation value of the formaldehyde sensor according to the temperature information and/or the humidity information; determining a target formaldehyde concentration value of the formaldehyde sensor according to the formaldehyde concentration compensation value and the initial formaldehyde concentration value.

First claim

What is claimed is:

1 . A formaldehyde concentration measurement method, comprising:
determining an initial formaldehyde concentration value measured by a formaldehyde sensor; acquiring temperature information of an environment surrounding the formaldehyde sensor, and determining a formaldehyde concentration compensation value of the formaldehyde sensor according to the temperature information; or acquiring humidity information of the environment surrounding the formaldehyde sensor, and determining the formaldehyde concentration compensation value of the formaldehyde sensor according to the humidity information; or acquiring the temperature information and the humidity information of the environment surrounding the formaldehyde sensor, and determining the formaldehyde concentration compensation value of the formaldehyde sensor according to the temperature information and the humidity information; and determining a target formaldehyde concentration value of the formaldehyde sensor according to the formaldehyde concentration compensation value and the initial formaldehyde concentration value.

2 . The method according to claim 1 , wherein the temperature information is a temperature value, and the humidity information is a humidity value;
the determining the formaldehyde concentration compensation value of the formaldehyde sensor according to the temperature information comprises: calculating a first difference between the temperature value and a set temperature threshold, and determining the formaldehyde concentration compensation value of the formaldehyde sensor according to the first difference; the determining the formaldehyde concentration compensation value of the formaldehyde sensor according to the humidity information comprises: calculating a second difference between the humidity value and a set humidity threshold, and determining the formaldehyde concentration compensation value of the formaldehyde sensor according to the second difference; and the determining the formaldehyde concentration compensation value of the formaldehyde sensor according to the temperature information and the humidity information comprises: calculating the first difference between the temperature value and the set temperature threshold and the second difference between the humidity value and the set humidity threshold; and determining the formaldehyde concentration compensation value of the formaldehyde sensor according to the first difference and the second difference.

3 . The method according to claim 2 , wherein
the determining the formaldehyde concentration compensation value of the formaldehyde sensor according to the first difference comprises: determining a first formaldehyde concentration compensation value of the formaldehyde sensor corresponding to the first difference between the temperature value and the set temperature threshold, according to a preset corresponding relationship between the first difference, between the temperature value and the set temperature threshold, and the formaldehyde concentration compensation value of the formaldehyde sensor; and setting the first formaldehyde concentration compensation value as the formaldehyde concentration compensation value of the formaldehyde sensor; the determining the formaldehyde concentration compensation value of the formaldehyde sensor according to the second difference comprises: determining a second formaldehyde concentration compensation value of the formaldehyde sensor corresponding to the second difference between the humidity value and the set humidity threshold, according to a preset corresponding relationship between the second difference, between the humidity value and the set humidity threshold, and the formaldehyde concentration compensation value of the formaldehyde sensor; and setting the second formaldehyde concentration compensation value as the formaldehyde concentration compensation value of the formaldehyde sensor; the determining the formaldehyde concentration compensation value of the formaldehyde sensor according to the first difference and the second difference comprises: determining the first formaldehyde concentration compensation value of the formaldehyde sensor corresponding to the first difference between the temperature value and the set temperature threshold, according to the preset corresponding relationship between the first difference, between the temperature value and the set temperature threshold, and the formaldehyde concentration compensation value of the formaldehyde sensor; determining the second formaldehyde concentration compensation value of the formaldehyde sensor corresponding to the second difference between the humidity value and the set humidity threshold, according to the preset corresponding relationship between the second difference, between the humidity value and the set humidity threshold, and the formaldehyde concentration compensation value of the formaldehyde sensor; and setting a sum of the first formaldehyde concentration compensation value and the second formaldehyde concentration compensation value as the formaldehyde concentration compensation value of the formaldehyde sensor.

4 . The method according to claim 1 , further comprising:
acquiring operating parameter information of the formaldehyde sensor in a preset time period, wherein the operating parameter information comprises: total operating time period of the formaldehyde sensor in the preset time period, or total number of operations of the formaldehyde sensor in the preset time period, or the total operating time period of the formaldehyde sensor in the preset time period and the total number of operations of the formaldehyde sensor in the preset time period; and sending a corresponding command signal to the formaldehyde sensor in order to instruct the formaldehyde sensor to perform zero point calibration when the operating parameter information satisfies a preset condition.

5 . The method according to claim 4 , wherein the sending the corresponding command signal to the formaldehyde sensor in order to instruct the formaldehyde sensor to perform the zero point calibration, when the operating parameter information satisfies the preset condition, comprises:
when the operating parameter information of the formaldehyde sensor in the preset time period is the total operating time period of the formaldehyde sensor in the preset time period, comparing the total operating time period of the formaldehyde sensor in the preset time period with a set total operating time period threshold to obtain a first comparison result; determining that the operating parameter information satisfies the preset condition when the first comparison result is that the total operating time period of the formaldehyde sensor in the preset time period is greater than the set total operating time period threshold; when the operating parameter information of the formaldehyde sensor in the preset time period is the total number of operations of the formaldehyde sensor in the preset time period, comparing the total number of operations of the formaldehyde sensor in the preset time period with a set total number threshold of operations to obtain a second comparison result; determining that the operating parameter information satisfies the preset condition when the second comparison result is that the total number of operations of the formaldehyde sensor in the preset time period is greater than the set total number threshold of operations; when the operating parameter information of the formaldehyde sensor in the preset time period comprises the total operating time period of the formaldehyde sensor in the preset time period and the total number of operations of the formaldehyde sensor in the preset time period, comparing the total operating time period of the formaldehyde sensor in the

Assignees

• Gree Electric Appliances Inc Zhuhai

Inventors

• Kang Zhengwei
• Ni Linhai
• Qin Bin
• Su Weibang

Classifications

• G01N33/006

  Avoiding interference of water vapour with the gas to be measured · CPC title

• G01N33/0047

  Organic compounds · CPC title

• G01N33/0006 Primary

  Calibrating gas analysers · CPC title