EP-4741710-A1 - FIRE GRATE AND GAS DEVICE

EP4741710A1EP 4741710 A1EP4741710 A1EP 4741710A1EP-4741710-A1

Abstract

Disclosed are a fire grate and a gas device. The fire grate includes a casing, a combustion cover and a metal mesh. An airflow channel is formed inside the casing. The combustion cover is provided at the top portion of the casing, and is provided with a plurality of first fire apertures communicating with the airflow channel. A plurality of first rivet parts are provided at the top surface of the combustion cover. The metal mesh is provided at the upper surface of the combustion cover, and covers the plurality of first fire apertures. The plurality of first rivet parts press and fix the metal mesh to the upper surface of the combustion cover.

Inventors

WANG, JIN
LI, Maozhao
XUE, Chengzhi
CHEN, WENFENG
XIONG, Xiaojun

Assignees

Wuhu Midea Kitchen And Bath Appliances MFG. Co., Ltd.

Dates

Publication Date: 20260513
Application Date: 20250930

Claims (10)

A fire grate, comprising: a casing (1), wherein an airflow channel is formed inside the casing (1); a combustion cover (2) provided at a top portion of the casing (1) and provided with a plurality of first fire apertures (201) communicating with the airflow channel, wherein a plurality of first rivet parts (23) are provided at a top surface of the combustion cover (2); and a metal mesh (3) provided at an upper surface of the combustion cover (2) and covering the plurality of first fire apertures (201), wherein the plurality of first rivet parts (23) press and fix the metal mesh (3) to the upper surface of the combustion cover (2).
The fire grate according to claim 1, wherein: the combustion cover (2) comprises a panel (21) extending from one end of the casing (1) to the other end in a longitudinal direction of the casing (1), the plurality of first fire apertures (201) being spaced apart in a longitudinal direction of the panel (21); the panel (21) has an upper surface and a lower surface opposite to the upper surface, and the metal mesh (3) is provided at the upper surface of the panel (21); and the plurality of first rivet parts (23) are respectively located on both lateral sides of the panel (21) to respectively clamp two side edges, away from the panel (21), of a surface of the metal mesh (3).
The fire grate according to claim 2, wherein: the combustion cover (2) further comprises two edge plates (22) respectively provided on both lateral sides of the panel (21), the two edge plates (22) being bent with respect to the panel (21) in a direction from the upper surface to the lower surface of the panel (21) to be inserted into the airflow channel; and the plurality of first rivet parts (23) on the both sides are respectively connected to the two edge plates (22).
The fire grate according to claim 3, wherein each of the plurality of first rivet parts (23) comprises: a connection portion (231) with one end coupled to an upper edge of each edge plate (22) and the other end extending upward in a direction away from the two edge plates (22); and a clamping portion (232) coupled to an end, away from the two edge plates (22), of the connection portion (231) and opposite to the panel (21) to form a clamping space for fixing the metal mesh (3).
The fire grate according to any one of claims 2 to 4, wherein the metal mesh (3) is welded to portions at both ends of the panel (21) in the longitudinal direction where no first fire aperture (201) is provided.
The fire grate according to any one of claims 1 to 5, wherein the plurality of first rivet parts (23) and the combustion cover (2) are integrally formed.
The fire grate according to any one of claims 2 to 6, wherein: the panel (21) has a hollow area; the panel (21) is provided with a plurality of first dividing ribs (211) extending in a width direction of the panel (21) in the hollow area, the plurality of first dividing ribs (211) being arranged at intervals in the longitudinal direction of the panel (21) to divide the hollow area into the plurality of first fire apertures (201) arranged at intervals along the longitudinal direction of the panel (21); the panel (21) is provided with a second dividing rib (212) extending along the longitudinal direction of the panel (21) at each of the plurality of first fire apertures (201), the second dividing rib (212) dividing each of the plurality of first fire apertures (201) into two first sub-fire apertures; and two adjacent second dividing ribs (212) are staggered in the width direction of the panel (21).
The fire grate according to any one of claims 3 to 7, further comprising a rectifying plate (4) located below the panel (21), the rectifying plate (4) being provided with two side plates on both sides in a width direction of the rectifying plate (4), the two side plates being inserted between the two edge plates (22), wherein: the rectifying plate (4) is provided with a plurality of rectifying apertures (401); and an end of the edge plate (22) away from the panel (21) is provided with a plurality of second rivet parts (24), the plurality of second rivet parts (24) clamping the rectifying plate (4) and the two side plates in the combustion cover (2).
The fire grate according to claim 8, wherein: the casing (1) comprises two side casing walls (11) respectively located outside the two edge plates (22), each of the two side casing walls (11) being provided with a plurality of convex humps protruding outward, the plurality of convex humps being arranged at intervals along the longitudinal direction of the casing (1); a cavity communicating with the airflow channel is formed between each of the plurality of convex humps and an adjacent edge plate (22), the cavity being open at a top to form a second fire aperture; and a total area of the rectifying apertures (401) is defined as S1, and a total area of the plurality of first fire apertures (201) and the second fire aperture as S, then 0.3≤S1/S≤0.45.
A gas device, comprising the fire grate according to any one of claims 1 to 9.

Description

TECHNICAL FIELD The present invention relates to the technical field of combustion, and in particular to a fire grate and a gas device. BACKGROUND A burner is the core component of a gas device. In the related art, the flame intensity of the burner is high, and the flue gas emitted by instantaneous combustion is poor, resulting in high nitrogen oxides and failing to meet the requirements of low nitrogen emission performance. SUMMARY The main purpose of the present invention is to propose a fire grate, which aims to reduce the flame height and make the flame uniform, to achieve full combustion and reduce nitrogen oxide emissions. To achieve the above purpose, the fire grate proposed in the present invention includes: a casing, an airflow channel is formed inside the casing, a combustion cover and a metal mesh. In an embodiment of the present invention, the combustion cover is provided at a top portion of the casing and provided with a plurality of first fire apertures communicating with the airflow channel. In an embodiment of the present invention, a plurality of first rivet parts are provided at a top surface of the combustion cover. In an embodiment of the present invention, the metal mesh is provided at an upper surface of the combustion cover and covering the plurality of first fire apertures. In an embodiment of the present invention, the plurality of first rivet parts press and fix the metal mesh to the upper surface of the combustion cover. In an embodiment of the present invention, the combustion cover includes a panel extending from one end of the casing to the other end in a longitudinal direction of the casing. In an embodiment of the present invention, the plurality of first fire apertures are spaced apart in a longitudinal direction of the panel. In an embodiment of the present invention, the panel has an upper surface and a lower surface opposite to the upper surface. In an embodiment of the present invention, the metal mesh is provided at the upper surface of the panel. In an embodiment of the present invention, the plurality of first rivet parts are respectively located on both lateral sides of the panel to respectively clamp two side edges, away from the panel, of a surface of the metal mesh. In an embodiment of the present invention, the combustion cover further includes two edge plates respectively provided on both lateral sides of the panel. In an embodiment of the present invention, the two edge plates are bent with respect to the panel in a direction from the upper surface to the lower surface of the panel to be inserted into the airflow channel. In an embodiment of the present invention, the plurality of first rivet parts on the both sides are respectively connected to the two edge plates. In an embodiment of the present invention, each of the plurality of first rivet parts includes a connection portion and a clamping portion. In an embodiment of the present invention, one end of the connection portion is coupled to an upper edge of each edge plate and the other end of the connection portion is extending upward in a direction away from the edge plates. In an embodiment of the present invention, a clamping portion is coupled to an end, away from the two side plates, of the connection portion and opposite to the panel to form a clamping space for fixing the metal mesh. In an embodiment of the present invention, the metal mesh is welded to portions at both ends of the panel in the longitudinal direction where no first fire aperture is provided. In an embodiment of the present invention, the plurality of first rivet parts and the combustion cover are integrally formed. In an embodiment of the present invention, the panel has a hollow area, and the panel is provided with a plurality of first dividing ribs extending in a width direction of the panel in the hollow area. In an embodiment of the present invention, the plurality of first dividing ribs being arranged at intervals in the longitudinal direction of the panel to divide the hollow area into the plurality of first fire apertures arranged at intervals along the longitudinal direction of the panel. In an embodiment of the present invention, the panel is provided with a second dividing rib extending along the longitudinal direction of the panel at each of the plurality of first fire apertures. In an embodiment of the present invention, the second dividing rib divides each of the plurality of first fire apertures into two first sub-fire apertures, and two adjacent second dividing ribs are staggered in the width direction of the panel. In an embodiment of the present invention, the fire grate further includes a rectifying plate located below the panel. In an embodiment of the present invention, the rectifying plate is provided with two side plates on both sides of in a width direction of the rectifying plate, and the two side plates are inserted between the two edge plates. In an embodiment of the present invention, the rectifying plate is