Emission reduction device for cooking fumes produced from smoking, frying and roasting

Patent metadata

Field	Value
Publication number	US-12337281-B2
Application number	US-202217587369-A
Country	US
Kind code	B2
Filing date	Jan 28, 2022
Priority date	May 17, 2021
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

An emission reduction device for cooking fumes produced from smoking, frying and roasting is provided, which includes a purifying-tank shell. One end of the purifying-tank shell is provided with an air inlet and other end of the purifying-tank shell is provided with an air outlet. The device further includes a nebulizer, an ultrasonic coagulating unit, and an electrostatic deposition unit, which are sequentially arranged in the purifying-tank shell from the air inlet to the air outlet. A box body is connected to the air outlet of the purifying-tank shell, the box body is provided with a photocatalytic oxidation unit, a plasma catalytic oxidation assembly and an end filter unit therein. An exhaust port is installed on a rear side of the box body. Two sides of the ultrasonic coagulating unit are each provided with a flow rectifier which is longitudinally and slidably arranged in the purifying-tank shell.

First claim

What is claimed is:

1. An emission reduction device for cooking fumes produced from smoking, frying and roasting, the emission reduction device comprising a purifying-tank shell, one end of the purifying-tank shell is provided with an air inlet and other end of the purifying-tank shell is provided with an air outlet, wherein the emission reduction device further comprises a nebulizer, an ultrasonic coagulating unit, and an electrostatic deposition unit, which are sequentially arranged in the purifying-tank shell from the air inlet to the air outlet; a box body is connected to the air outlet of the purifying-tank shell; the box body is provided with a photocatalytic oxidation unit, a plasma catalytic oxidation assembly and an end filter unit therein; an exhaust port is installed on a rear side of the box body; two sides of the ultrasonic coagulating unit are each provided with a flow rectifier which is longitudinally and slidably arranged in the purifying-tank shell; a cleaning tank is fixedly installed below the purifying-tank shell by a fixing support, an opening is formed on a top of the cleaning tank, and first ultrasonic generators are installed in the cleaning tank; the purifying-tank shell is provided with a driving device for driving the flow rectifier to slide longitudinally.

2. The emission reduction device for cooking fumes produced from smoking, frying and roasting according to claim 1 , wherein each of first groove tubes and a corresponding one of second groove tubes are respectively symmetrically arranged at a top and a bottom of the purifying-tank shell, both ends of the flow rectifier are respectively embedded in the first groove tube and the corresponding one of second groove tubes; each of first sealing rubber plates is fixedly installed in a corresponding one of the first groove tubes, and each of second sealing rubber plates is fixedly installed in a corresponding one of the second groove tubes; the second sealing rubber plate is provided with an extrusion gap for the flow rectifier to pass through; a sealing door which opens downward unidirectionally is hinged at an end opening of the second groove tube.

3. The emission reduction device for cooking fumes produced from smoking, frying and roasting according to claim 2 , wherein the driving device comprises a winch and a pulling rope, the winch is fixedly installed on the top of the purifying-tank shell through a frame, the pulling rope is wound on the winch, each of two ends of the pulling rope passes through a corresponding one of the first groove tubes, and the end of the pulling rope is fixedly connected to the flow rectifier; the first sealing rubber plate is provided with an extrusion hole for the pulling rope to pass through, a guide wheel for winding the pulling rope is arranged on the purifying-tank shell.

4. The emission reduction device for cooking fumes produced from smoking, frying and roasting according to claim 1 , wherein a cavity for flowing fluids is arranged in a wall of the purifying-tank shell, and the cavity is provided with an inlet and an outlet.

5. The emission reduction device for cooking fumes produced from smoking, frying and roasting according to claim 1 , wherein a downcomer is fixedly installed at the bottom of the purifying-tank shell and located at a corresponding position below the nebulizer; an inclined flow guide surface inclined toward the downcomer is arranged at a bottom of an inner wall of the purifying-tank shell and located below the nebulizer.

6. The emission reduction device for cooking fumes produced from smoking, frying and roasting according to claim 1 , wherein the ultrasonic coagulating unit comprises second ultrasonic generators and a reflecting plate, the second ultrasonic generators are arranged on an upper side and a lower side of the purifying-tank shell, the reflecting plate is installed at a middle of an inside of the purifying-tank shell and is arranged in parallel with the second ultrasonic generators.

7. The emission reduction device for cooking fumes produced from smoking, frying and roasting according to claim 1 , wherein an anti-corrosion structure is arranged in a section of an inner wall the purifying-tank shell which is installed with the nebulizer, and the anti-corrosion structure is fiber reinforced plastic.

8. The emission reduction device for cooking fumes produced from smoking, frying and roasting according to claim 1 , wherein the electrostatic deposition unit comprises a positive plate and a negative plate which are symmetrically installed on an upper side and a lower side of the purifying-tank shell respectively.

9. The emission reduction device for cooking fumes produced from smoking, frying and roasting according to claim 1 , wherein the photocatalytic oxidation unit comprises baffle plates and ultraviolet light sources, a surface of each of the baffle plates is coated with TiO 2 coating; two guard plates are vertically fixedly installed in the box body, the two guard plates separate the box body into a vertical S-shaped flow channel; each of the baffle plates is fixedly installed on an inner side of a corresponding one of the two guard plates and divides space between the two guard plates into a horizontal S-shaped flow channel; each of the ultraviolet light sources is arranged on an inner side wall of a corresponding one of the two guard plates, and the ultraviolet light sources are each an ultraviolet lamp with a wavelength of 185 nm.

10. The emission reduction device for cooking fumes produced from smoking, frying and roasting according to claim 1 , wherein the end filter unit is an activated carbon fiber filter mesh.

Assignees

• Univ Hefei Technology

Inventors

• Cai Kezhou
• Liu Xingyun
• Xing Wei
• Hui Teng
• Zhou Hui
• Xu Baocai
• Chen Conggui

Classifications

• B01J35/39

  Photocatalytic properties · CPC title

• F24C15/2035

  Arrangement or mounting of filters (F24C15/2021 takes precedence; filters per se B01D46/00) · CPC title

• F24C15/2014 Primary

  with means for oxidation of cooking fumes · CPC title

• B01J21/063

  Titanium; Oxides or hydroxides thereof · CPC title

• B01J19/006

  Baffles · CPC title