# US 10,502,722 B2 · Method for indoor air analysis, and sampling arrangement

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,502,722 B2
- Document ID: US10502722B2
- Status: Granted
- Kind: B2
- Application number: 15/502,939
- Filed: 2015-12-23
- Published: 2018-07-26
- Granted: 2019-12-10
- Earliest claimed: 2014-12-30
- Assignees: SisäIlmatutkimuspalvelut Elisa Aattela Oy
- Applicants: SisäIlmatutkimuspalvelut Elisa Aattela Oy
- Inventors: Elisa Aattela
- Web page: https://patentgrep.com/patent/US10502722B2

## CPC

- G01N 33/0016: {by regulating a physical variable, e.g. pressure or temperature}
- G01N 1/42: Low-temperature sample treatment, e.g. cryofixation
- G01N 2001/2282: {with cooling means}
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)

## Abstract

A method for indoor air analysis, and a sampling arrangement are disclosed. The method includes taking a sample from indoor air in such a way that a surface is cooled to be so cold that water molecules of the indoor air undergo deposition on the surface, whereby frost is generated on the surface; defrosting the frost into water; and analysing the quality of the indoor air from the water.

## Claims

### Claim 1

A method for sampling indoor air, the method comprising the steps of:
providing a box having a plurality of sidewalls and an openable lid, the plurality of sidewalls and openable lid forming an interior of the box;
adding a solid cooling material to the interior of the box through the openable lid;
taking a sample from the indoor air in such a way that a surface an exterior surface of the box is cooled to be so cold that water molecules of the indoor air undergo deposition on the surface, whereby frost is generated on the surface;
cooling the surface in such a way that the solid cooling material is provided in connection with the surface; and
defrosting the frost into water.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the frost is defrosted into water in such a way that the cooling material is removed from the connection of the surface, and thus the surface is allowed to be warmed up.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the cooling material is dry ice.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the box is flat.

### Claim 5 (depends on 1)

The method according to claim 1, further comprising accelerating warming of the surface by a heating element arranged inside the box.

### Claim 6 (depends on 1)

The method according to claim 1, further comprising removing the solid cooling material from the box.

### Claim 7 (depends on 1)

The method according to claim 1, further comprising adding a heating element to the box after removing the solid cooling material from the box.

### Claim 8 (depends on 1)

The method according to claim 1, further comprising removing evaporating cooling material from the box with a hose attached to the box.

### Claim 9

A sampling arrangement, comprising:
a box having a plurality of sidewalls and an openable lid defining an interior; and
a cooling arrangement for cooling an exterior surface in such a way that the exterior surface is cooled so cold that water molecules of the indoor air undergo deposition on the surface, whereby frost is generated on the surface, the cooling arrangement for cooling the surface comprising:
solid cooling material to be provided in connection with the surface, the solid cooling material being removable from the interior of the box; and
a collection receptacle for collecting water melted out of the frost.

### Claim 10 (depends on 9)

The sampling arrangement according to claim 9, wherein the solid cooling material is dry ice.

### Claim 11 (depends on 9)

The sampling arrangement according to claim 9, wherein in connection with the box, there is a hose for removing evaporating cooling material from the interior of the box.

### Claim 12 (depends on 9)

The sampling arrangement according to claim 9, wherein the box is flat.

### Claim 13 (depends on 9)

The sampling arrangement according to claim 9, further comprising a heating element for accelerating warming of the surface and arranged inside the box.