Range hood fire valve

A technology for fire dampers and range hoods, which is used in the removal of oil fume, control valves, safety valves, etc., can solve the problems of large air outlet area, complex structure, and large air outlet loss, and achieve reliable closing effects.

Active Publication Date: 2015-08-05
NINGBO FOTILE KITCHEN WARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the fire damper can be forcibly closed when the flue gas temperature in the public flue gas duct is in a high emergency state, its structure is relatively complicated, the air outlet area of ​​the channel occupied is lar...

Method used

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  • Range hood fire valve
  • Range hood fire valve
  • Range hood fire valve

Examples

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] Such as Figure 1 to Figure 4 As shown, the range hood fire damper in this embodiment includes a casing 1, a rotating shaft 3, a rotating valve plate 4, a first torsion spring 5, a second torsion spring 6, a fuse block 71, a screw 72, a limit rod 8, a seal Components such as pad 9, rotating shaft fixing bracket 10 and rotating shaft limit ring 11.

[0023] Wherein, a fume passage is formed inside the shell 1, and the fume passage has an air inlet 21 and an air outlet 22 arranged opposite to each other. The rotating shaft fixing bracket 10 is installed on both sides of the casing 1, the rotating shaft 3 is arranged radially inside the oil fume passage, the two ends of the rotating shaft 3 are installed on the corresponding rotating shaft fixing bracket 10, the rotating shaft limit ring 11 is sleeved on the rotating shaft 3, and used To...

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PUM

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Abstract

Disclosed is a range hood fire valve. The range hood fire valve comprises a housing, in which an oil fume channel is formed; the oil fume channel is provided with an air inlet and an air outlet which are oppositely arranged; the inside of the oil fume channel is provided with a radial mounting shaft and a rotating valve block, wherein the valve block is mounted on the mounting shaft and can open and close the air inlet. The range hood fire valve is characterized in that the mounting shaft is provided with a first torsional spring and a second torsional spring; the first torsional spring acts on the rotating valve block all the time and enables the air inlet to obtain a tendency to being closed; the second torsional spring is provided with a fusing module and acts on the rotating valve block and enables the air inlet to obtain a tendency to being closed only when the fusing module is fused. The range hood fire valve has the advantages that, the internal mounting shaft is provided with the first torsional spring and the second torsional spring, so that when the fusing module is fused, the action forces of the first torsional spring and the second torsional spring are superpositioned and are sufficient to overcome pressure at the air inlet, so that the air inlet can be closed more reliably.

Description

technical field [0001] The invention relates to a fire damper, in particular to a fire damper for range hoods. Background technique [0002] In kitchens using longitudinal public flue ducts, in order to prevent oily fumes from flowing back into the kitchen, a device such as a flue check valve is installed between the outlet pipe of the range hood and the public flue duct. . Existing flue check valves generally include an oil fume passage formed by a casing, the oil fume passage has opposite air inlets and air outlets, the air inlet is connected to the outlet pipe of the range hood, and the air outlet extends into the public flue gas passage , A valve plate that can be opened and closed is arranged at the air outlet of the oil fume channel, and the valve plate is installed on the inner wall of the oil smoke channel through the rotation of the horizontally arranged valve plate rotating shaft. When the range hood is not in use, the valve plate is in the closed position due to...

Claims

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Application Information

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IPC IPC(8): F16K15/03F16K17/38F16K17/40F24C15/20
CPCF16K15/03F16K17/38F16K17/40F24C15/20
Inventor 申志贤何立博贾博贤茅忠群诸永定
Owner NINGBO FOTILE KITCHEN WARE CO LTD
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