Method and device for calculating consumed lifespan

Patent metadata

Field	Value
Publication number	US-10247654-B2
Application number	US-201615361499-A
Country	US
Kind code	B2
Filing date	Nov 28, 2016
Priority date	Nov 27, 2015
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

A method and a device for calculating a consumed lifespan are provided. The method includes: controlling an electric motor of a purifier to rotate at a predetermined speed; acquiring a value of a sampled parameter of the electric motor, the sampled parameter being at least one of a sampled current and a sampled voltage of the electric motor; and determining a consumed lifespan of the purifier according to the acquired value of the sampled parameter, wherein the consumed lifespan is in positive correlation with the acquired value of the sampled parameter.

First claim

What is claimed is:

1. A method for calculating a consumed lifespan, comprising followings steps:
controlling an electric motor of a purifier to rotate at a predetermined speed;
acquiring a value of a sampled parameter of the electric motor rotating at the predetermined speed, the sampled parameter being at least one of a sampled current and a sampled voltage of the electric motor; and
determining a consumed lifespan of the purifier according to the acquired value of the sampled parameter and a pre-defined corresponding relationship, wherein the pre-defined corresponding relationship is used for storing relations between values of the sampled parameter and consumed lifespans, the relations between values of the sampled parameter and consumed lifespans are obtained under a condition that the electric motor of the purifier rotates at the predetermined speed, and the determined consumed lifespan is in positive correlation with the acquired value of the sampled parameter.

2. The method of claim 1 , wherein the step of determining a consumed lifespan of the purifier according to the acquired value of the sampled parameter comprises:
retrieving the pre-defined corresponding relationship; and
searching for a consumed lifespan corresponding to the acquired value of the sampled parameter in the pre-defined corresponding relationship.

3. The method of claim 2 , wherein the method further comprises following steps:
controlling the electric motor of the purifier to rotate at the predetermined speed;
measuring a first sampled parameter of the electric motor and a second sampled parameter of the electric motor rotating at the predetermined speed, the first sampled parameter being a value of the sampled parameter when the purifier is operated with a new filter core, and the second sampled parameter being a value of the sampled parameter when the purifier is operated with the filter core reaching an end of its rated service life;
determining a range between the first sampled parameter and the second sampled parameter; and
defining a corresponding relationship between the values in the range and consumed lifespans as the pre-defined corresponding relationship.

4. The method of claim 3 , wherein when the consumed lifespans are indicated in percentages, the step of defining a corresponding relationship between the values in the range and consumed lifespans comprises:
dividing the range into 100 equal parts to obtain a value of each of the parts; and
determining a consumed lifespan in percentage for the value of each of the parts according to a proportion of the value to the range to obtain the corresponding relationship.

5. The method of claim 1 , wherein the step of acquiring a value of a sampled parameter of the electric motor comprises:
when the sample parameter is a sampled current of the electric motor, acquiring a value of the sampled voltage of the electric motor; and
dividing the value of the sampled voltage by a resistance of the electric motor to obtain the value of the sampled parameter.

6. The method of claim 2 , wherein the step of acquiring a value of a sampled parameter of the electric motor comprises:
when the sample parameter is a sampled current of the electric motor, acquiring a value of the sampled voltage of the electric motor; and
dividing the value of the sampled voltage by a resistance of the electric motor to obtain the value of the sampled parameter.

7. The method of claim 3 , wherein the step of acquiring a value of a sampled parameter of the electric motor comprises:
when the sample parameter is a sampled current of the electric motor, acquiring a value of the sampled voltage of the electric motor; and
dividing the value of the sampled voltage by a resistance of the electric motor to obtain the value of the sampled parameter.

8. The method of claim 4 , wherein the step of acquiring a value of a sampled parameter of the electric motor comprises:
when the sample parameter is a sampled current of the electric motor, acquiring a value of the sampled voltage of the electric motor; and
dividing the value of the sampled voltage by a resistance of the electric motor to obtain the value of the sampled parameter.

9. A device for calculating a consumed lifespan, comprising:
a processor; and
a memory for storing instructions executable by the processor;
wherein the processor is configured to perform:
controlling an electric motor of a purifier to rotate at a predetermined speed;
acquiring a value of a sampled parameter of the electric motor rotating at the predetermined speed, the sampled parameter being at least one of a sampled current and a sampled voltage of the electric motor; and
determining a consumed lifespan of the purifier according to the acquired value of the sampled parameter and a pre-defined corresponding relationship, wherein the pre-defined corresponding relationship is used for storing relations between values of the sampled parameter and consumed lifespans, the relations between values of the sampled parameter and consumed lifespans are obtained under a condition that the electric motor of the purifier rotates at the predetermined speed, and the determined consumed lifespan is in positive correlation with the acquired value of the sampled parameter.

10. The device of claim 9 , wherein determining a consumed lifespan of the purifier according to the acquired value of the sampled parameter comprises:
retrieving the pre-defined corresponding relationship; and
searching for a consumed lifespan corresponding to the acquired value of the sampled parameter in the pre-defined corresponding relationship.

11. The device of claim 10 , wherein the processor is further configured to perform:
controlling the electric motor of the purifier to rotate at the predetermined speed;
measuring a first sampled parameter of the electric motor and a second sampled parameter of the electric motor rotating at the predetermined speed, the first sampled parameter being a value of the sampled parameter when the purifier is operated with a new filter core, and the second sampled parameter being a value of the sampled parameter when the purifier is operated with the filter core reaching an end of its rated service life;
determining a range between the first sampled parameter and the second sampled parameter; and
defining a corresponding relationship between the values in the range and consumed lifespans as the pre-defined corresponding relationship.

12. The device of claim 11 , wherein when the consumed lifespans are indicated in percentages, defining a corresponding relationship between the values in the range and consumed lifespans comprises:
dividing the range into 100 equal parts to obtain a value of each of the parts; and
determining a consumed lifespan in percentage for the value of each of the parts according to a proportion of the value to the range to obtain the corresponding relationship.

13. The device of claim 9 , wherein acquiring a value of a sampled parameter of the electric motor comprises:
when the sample parameter is a sampled current of the electric motor, acquiring a value of the sampled voltage of the electric motor; and
dividing the value of the sampled voltage by a resistance of the electric motor to obtain the value of the sampled parameter.

14. The device of claim 10 , wherein acquiring a value of a sampled parameter of the electric motor comprises:
when the sample parameter is a sampled current of the electric motor, acquiring a value of the sampled voltage of the electric motor; and
dividing the value of the sampled voltage by a resistance of the electric motor to obtain

Assignees

• Xiaomi Inc
• Beijing Smartmi Tech Co Ltd

Inventors

• Yu Jiuping
• Liu Dongxu
• Yang Nuo

Classifications

• G01N15/08 Primary

  Investigating permeability, pore-volume, or surface area of porous materials · CPC title

• F24F11/39

  Monitoring filter performance · CPC title

• B01D46/0086 Primary

  Filter condition indicators · CPC title

• G01N2015/084

  Testing filters · CPC title

• F24F11/30

  for purposes related to the operation of the system, e.g. for safety or monitoring · CPC title