JPH0357341U - - Google Patents
Info
- Publication number
- JPH0357341U JPH0357341U JP11813489U JP11813489U JPH0357341U JP H0357341 U JPH0357341 U JP H0357341U JP 11813489 U JP11813489 U JP 11813489U JP 11813489 U JP11813489 U JP 11813489U JP H0357341 U JPH0357341 U JP H0357341U
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- flap
- prevention device
- backflow prevention
- absorbing layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002265 prevention Effects 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims 2
- 238000012856 packing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
Landscapes
- Check Valves (AREA)
- Duct Arrangements (AREA)
Description
第１図は逆流防止装置の断面図、第２図は第１
図の−断面図、第３図はパツキンの断面図、
第４図は第１図の−断面図である。 １……ダクト、２……筒体、３……フラツプ、
４……弁座、５……パツキン、６……吸音層、７
……スクリーン。
図の−断面図、第３図はパツキンの断面図、
第４図は第１図の−断面図である。 １……ダクト、２……筒体、３……フラツプ、
４……弁座、５……パツキン、６……吸音層、７
……スクリーン。
Claims (1)
- 【実用新案登録請求の範囲】 １ 排気扇の下流側から排気口まで導かれた管路
１の途中に筒体２をほぼ水平に置き、該筒体内に
フラツプ３の上縁を枢着し、該フラツプの弁座３
を該筒体に斜めに設けると共に、該筒体内面に吸
音層６を形成した換気扇の逆流防止装置。 ２ 該筒体内面に互い違いにスクリーン７を置い
て蛇行した流路を形成した請求項１の換気扇の逆
流防止装置。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11813489U JPH0357341U (ja) | 1989-10-06 | 1989-10-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11813489U JPH0357341U (ja) | 1989-10-06 | 1989-10-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0357341U true JPH0357341U (ja) | 1991-06-03 |
Family
ID=31666319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11813489U Pending JPH0357341U (ja) | 1989-10-06 | 1989-10-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0357341U (ja) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58214076A (ja) * | 1982-06-07 | 1983-12-13 | Baiohazaade Taisaku Kenkyukai Kk | 消音効果を兼備した空調ダクトの逆流防止構造 |
-
1989
- 1989-10-06 JP JP11813489U patent/JPH0357341U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58214076A (ja) * | 1982-06-07 | 1983-12-13 | Baiohazaade Taisaku Kenkyukai Kk | 消音効果を兼備した空調ダクトの逆流防止構造 |