Gas sensor and gas sensor cartridge

Patent metadata

Field	Value
Publication number	US-12105043-B2
Application number	US-202017115841-A
Country	US
Kind code	B2
Filing date	Dec 9, 2020
Priority date	Jun 28, 2018
Publication date	Oct 1, 2024
Grant date	Oct 1, 2024

Abstract

A gas sensor includes: a gas sensor cartridge; and a gas sensor body to which the gas sensor cartridge, which includes: a case that has an intake port and an exhaust port and serves as a gas sensor chamber; a gas sensor device provided inside the case; an external connection terminal provided at the case and connected to the gas sensor device; a first sealing member that seals the intake port such that the intake port is opened when the gas sensor cartridge is attached to the gas sensor body; and a second sealing member that seals the exhaust port such that the exhaust port is opened when the gas sensor cartridge is attached to the gas sensor body, is detachably attached.

First claim

What is claimed is:

1. A gas sensor comprising:
a gas sensor cartridge; and
a gas sensor body to which the gas sensor cartridge is detachably attached, the gas sensor cartridge includes:
a case that has an intake port and an exhaust port and serves as a gas sensor chamber;
a gas sensor device provided inside the case;
an external connection terminal provided at the case and connected to the gas sensor device;
a first sealing member that seals the intake port such that the intake port is opened when the gas sensor cartridge is attached to the gas sensor body; and
a second sealing member that seals the exhaust port such that the exhaust port is opened when the gas sensor cartridge is attached to the gas sensor body,
an optical window is provided in the case and on a side opposite to a side of the case provided with the gas sensor device, and
the gas sensor further includes a condenser lens or an optical waveguide member provided on an inner surface of the optical window or between the optical window and the gas sensor device.

2. The gas sensor according to claim 1 , wherein the first sealing member is a first movable valve capable of opening and closing the intake port or a first protective film that is broken when the gas sensor cartridge is attached to the gas sensor body, and the second sealing member is a second movable valve capable of opening and closing the exhaust port or a second protective film that is broken when the gas sensor cartridge is attached to the gas sensor body.

3. The gas sensor according to claim 1 , wherein the optical window has a property of transmitting light including ultraviolet (UV).

4. The gas sensor according to claim 1 , wherein the optical window is provided on a side portion orthogonal to a bottom portion of the case provided with the gas sensor device, and the gas sensor further includes a reflection mirror that reflects light incident from the optical window toward the gas sensor device on a side opposite to a side of the case provided with the gas sensor device.

5. The gas sensor according to claim 1 , further comprising a light source provided in the gas sensor body or a light source provided outside the optical window.

6. The gas sensor according to claim 1 , wherein the light source is provided on a side portion orthogonal to a bottom portion of the case provided with the gas sensor device, and the gas sensor further includes a reflection mirror that reflects light from the light source toward the gas sensor device on a side opposite to a side of the case provided with the gas sensor device.

7. The gas sensor according to claim 1 , further comprising a gas adsorption member provided inside the case.

8. The gas sensor according to claim 1 , wherein the gas sensor device includes at least one of: a gas sensitive material including oxide containing Sn, W, Zn, or In or any combination of Sn, W, Zn, and In as a main material; a gas sensitive material including a semiconductor containing C as a main material; or a gas sensitive material including a halogen compound or oxide containing Cu or Ag as a main material.

9. The gas sensor according to claim 1 , further comprising a non-volatile memory element provided in the case, connected to the external connection terminal, and having characteristics of the gas sensor device recorded inside.

10. The gas sensor according to claim 1 , wherein the optical window is provided on a side of the case provided with the gas sensor device, and the gas sensor further includes a reflection mirror that reflects light incident from the optical window toward the gas sensor device on a side opposite to the side of the case provided with the gas sensor device.

11. The gas sensor according to claim 10 , further comprising a condenser lens or an optical waveguide member provided on an optical path from the optical window to the gas sensor device.

12. The gas sensor according to claim 1 , wherein the light source is provided on a side opposite to a side of the case provided with the gas sensor device.

13. The gas sensor according to claim 12 , further comprising a condenser lens or an optical waveguide member provided between the light source and the gas sensor device.

14. The gas sensor according to claim 1 , wherein the light source is provided on a side of the case provided with the gas sensor device, and the gas sensor further includes a reflection mirror that reflects light from the light source toward the gas sensor device on the side opposite to the side of the case provided with the gas sensor device.

15. The gas sensor according to claim 14 , further comprising a condenser lens or an optical waveguide member provided on an optical path from the light source to the gas sensor device.

Assignees

• Fujitsu Ltd

Inventors

• Tsuboi Osamu
• Ushigome Michio
• Momose Satoru
• Kikuchi Yoshio

Classifications

• A61L2103/15

  Laboratory, medical or dentistry appliances, e.g. catheters or sharps · CPC title

• G01N33/0027 Primary

  concerning the detector · CPC title

• A61L2202/11

  Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps · CPC title

• A61L2/26

  Accessories · CPC title

• A61L2/10

  Ultraviolet [UV] radiation · CPC title