JPS556105A - Heat-exchange sound-insulation ventilating fan - Google Patents
Heat-exchange sound-insulation ventilating fanInfo
- Publication number
- JPS556105A JPS556105A JP7703578A JP7703578A JPS556105A JP S556105 A JPS556105 A JP S556105A JP 7703578 A JP7703578 A JP 7703578A JP 7703578 A JP7703578 A JP 7703578A JP S556105 A JPS556105 A JP S556105A
- Authority
- JP
- Japan
- Prior art keywords
- intake
- heat exchanger
- heat
- exhaust
- exhaust passages
- 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
Abstract
PURPOSE: To raise the heat exchange ratio and decrease noises on a heat transfer surface, by placing a heat exchanger symmetrically as to an intake and an exhaust passages so that the product of the acoustic impedances of the upstream parts of the intake and the exhaust passages at the heat exchanger is almost equal to that of acoustic impedances of the downstream parts of the intake and the exhaust passages.
CONSTITUTION: An outside intake port 16 and an outside exhaust port are opened through an outside wall 15. An inside exhaust port 19 and an inside intake port 20 are opened through an inside wall 18. The heat exchanger 21 is provided near the central part of the inside wall 18 symmetrically as to the intake passage 27 and the exhaust passage 28, which are symmetrically formed. As a result, the acoustic impedances Z1, Z3, Z4, Z2 of the upstream and downstream parts 27a, 28a, 27b, 28b of the intake and the exhaust passages 27, 28 at the heat exchanger are related to one another as Z1.Z4≈Z3.Z2. The invasion of noises through the heat exchanger is thus almost eliminated.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7703578A JPS556105A (en) | 1978-06-27 | 1978-06-27 | Heat-exchange sound-insulation ventilating fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7703578A JPS556105A (en) | 1978-06-27 | 1978-06-27 | Heat-exchange sound-insulation ventilating fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS556105A true JPS556105A (en) | 1980-01-17 |
Family
ID=13622493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7703578A Pending JPS556105A (en) | 1978-06-27 | 1978-06-27 | Heat-exchange sound-insulation ventilating fan |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS556105A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6187861A (en) * | 1984-10-08 | 1986-05-06 | Canon Inc | Surface treatment of structural material for vacuum apparatus |
| JPH01156496A (en) * | 1987-12-11 | 1989-06-20 | Shinku Zairyo Kk | Formation of corrosion-resistant coating film on stainless steel member |
-
1978
- 1978-06-27 JP JP7703578A patent/JPS556105A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6187861A (en) * | 1984-10-08 | 1986-05-06 | Canon Inc | Surface treatment of structural material for vacuum apparatus |
| JPH01156496A (en) * | 1987-12-11 | 1989-06-20 | Shinku Zairyo Kk | Formation of corrosion-resistant coating film on stainless steel member |
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