GB2599454A

GB2599454A - A silencing structure of burner nozzle for gas appliances

Info

Publication number: GB2599454A
Application number: GB2020067.1A
Authority: GB
Inventors: Zhou Yin
Original assignee: Ningbo Richen Electrical Appliance Co Ltd
Current assignee: Ningbo Richen Electrical Appliance Co Ltd
Priority date: 2020-09-30
Filing date: 2020-12-17
Publication date: 2022-04-06
Anticipated expiration: 2040-12-17
Also published as: GB2599454B; GB202020067D0; CN213576172U; GB2599454A8

Abstract

A burner nozzle for a gas burning appliance has a burner housing 3 with an ejection tube 2 connected to a gas fuel nozzle 1. The burner housing has a combustion air inlet 44 that includes a muffler/silencer 4 arranged outside of the gas fuel nozzle, and the muffler/silencer has a housing 41 that contains an internal cavity with sound reducing material 42. The combustion air inlet connects to the ejection tube, and in use, provides combustion air to the burner via the sound reducing material. Air and fuel gas mix in the ejection tube and the mixed gas is burnt at the burner nozzle surface. The muffler/silencer sound reducing material is a porous structure with multiple small holes and channels 421, for example a honeycomb structure. The channels of the porous structure may have a cross-sectional area of about 10 mm2 and a pore diameter of 0.2 mm. The silencer prevents the spread of noise, and achieves a noise reduction of the inflowing combustion air without affecting the combustion performance.

Description

A silencing structure of burner nozzle for gas appliances Technical field The present patent relates to the technical field of gas fireplaces, in particular to a silencing structure of burner nozzle for gas appliances.

Background art

As a heating equipment that uses clean energy, gas fireplaces can not only provide sufficient heating effect, but also provide real flames for viewing compared with heaters (such as wall-hung boilers), which are popular among consumers.

At present, the burner on gas appliances is generally composed of a burner body that emits a fire and a nozzle for injecting gas. The gas sprayed from the nozzle passes through a section of ejection channel before entering the cavity of the burner body. As the gas ejected by the nozzle is in a high-pressure injection state, under its high-speed motion, IS due to the Venturi effect, the air around the nozzle will be attracted into the ejection channel, which is used as a primary combustion air to mix with the gas, and then ejected from the channel and enters into the cavity of the burner body for combustion-supporting.

However, at present, when the high-speed flowing gas is directly ejected from the nozzle, it will cause high-frequency noise, even whistling When the combustion-supporting air enters the ejection channel, the friction between the air movement and the inner wall of the ejection channel will also produce "buzzing" noise. These noises can cause trouble to some users who are sensitive to sound, especially during resting time at night, restricting the use of gas fireplace equipment.

Summary of the patent

The technical problem to be solved by the present patent is to overcome the technical shortcomings of the background art and provides a silencing structure of burner nozzle for gas appliances. After the 5 structure of the present patent is applied at the nozzle structure of a gas appliance, it provides combustion-supporting air to the burner through the semi-closed combustion-supporting air channel with a silencer to prevent the spread of noise, so as to achieve noise reduction treatment at the source without affecting the combustion effect. It is more user-friendly, 10 and the gas fireplace can be used more widely. The structure is simple, and the installation is convenient, which is suitable for the noise reduction treatment for nozzle of most gas fireplaces.

The technical solutions adopted by the present patent to solve the above technical problems are as follows: A silencing structure of burner nozzle for gas appliances, which comprises a nozzle, an ejection tube matched and connected with the nozzle, a burner body matched and connected with the ejection tube, and a muffler arranged outside the nozzle and the ejection tube. The muffler includes a muffler shell and a muffler body matched and connected with the muffler shell. A plurality of mufflers can be provided as required. The internal cavity of the muffler shell forms a combustion-supporting air channel. The combustion-supporting air channel is connected to the internal cavity of the ejection tube. The fuel gas ejected from the nozzle enters the ejection tube. Due to the Venturi effect, the external combustion-supporting air passes through the muffler body and the combustion-supporting air channel sequentially and is drawn into the internal cavity of the ejection tube. Fuel gas and combustion-supporting air is mixed in the ejection tube, and then the mixed gas enters the internal cavity of the burner body for combustion. Due to the presence of the muffler shell and the muffler body, the noise generated by the gas and combustion-supporting air is isolated in the inside of the muffler shell, and the noise is attenuated by the muffler body.

Further, the muffler bodies include a plurality of small hole channels.

Further, the number of the small hole channels is not less than 6.

Further, the cross-sectional area of a single small hole of the small hole 10 channels is 4 mm2-20 mm2 Further, the cross section of a single small hole of the small hole channels is a hexagonal honeycomb structure.

Further, the muffler body is made of a porous material, and the pore diameter of the porous material is 0.01 mm-0 5 mm Further, one end of the muffler shell forms a combustion-supporting air inlet. The muffler bodies are provided at the combustion-supporting air inlet.

Further, the two ends of the nozzle respectively form the nozzle air inlet and the nozzle air outlet. The two ends of the ejection tube respectively form the ejection tube air inlet and the ejection tube air outlet. The nozzle air outlet is matched and connected with the ejection tube air inlet. The ejection tube air outlet is connected to the internal cavity of the burner body.

Further, the ejection tube is arranged inside the burner body.

Further, the nozzle air inlet is arranged inside the muffler. The nozzle air outlet is arranged at the exterior of the muffler.

Further, the ejection tube is arranged outside the burner body.

Further, the nozzle air inlet and the nozzle air outlet are both arranged inside the muffler.

Further, the air inlet of the ejection tube is provided with a plurality of ejection holes.

In the above technical solution, the number of a plurality is one or more than one.

The basic principle of the present patent: When the present patent is working, a combustible gas of high-pressure and high-speed is sprayed from the nozzle to the ejection tube. As the gas is in a high-speed flow state, under the action of the Venturi effect, an area of low-pressure state is formed inside the channel of the ejection tube, so that the air in the muffler shell enters the ejection tube as primary combustion-supporting air. So, the fuel gas and primary combustion-supporting air is mixed in the ejection tube, and then the mixed gas enters the internal cavity of the burner body for combustion.

Since the combustion-supporting air channel is a semi-closed space enclosed by the muffler shell, and connected with the outside only through the muffler body, the additional air from outside can enter the combustion-supporting air channel through the muffler body. The muffler body can be arranged in different directions as required, so that the primary combustion-supporting air required for combustion can be collected from different places as required.

Since the combustion-supporting air channel is a semi-closed space, and the nozzle is arranged inside the muffler shell, the muffler shell can effectively prevent the noise generated by the air from the nozzle and friction of the primary combustion-supporting air flow from spreading outward. The muffler body is a structure made of porous materials with multiple small holes and channels. It is an impedance composite muffler structure, which can effectively eliminate noises of various frequencies and adjust the noise reduction effect to the best.

Compared with the prior art, the beneficial effects of the present patent are: The present patent provides a silencing structure of burner nozzle for gas appliances. Since the nozzle and its surrounding space are provided with a closed shell, the noise generated by the gas and air entering the ejection tube can be effectively isolated inside an enclosed area of the shell. The muffler is a honeycomb channel made of porous materials.

While allowing combustion-supporting air to pass through, it can also cause sound friction in the channel and convert sound energy into heat energy, thereby reducing noise and making the gas fireplace to run more quietly. Thereby it is more user-friendly.

Description of attached figures

Figure 1 is a three-dimensional schematic diagram of the silencing structure of burner nozzle for gas appliances in embodiment 1 of the present patent.

Figure 2 is a schematic diagram of a partial cross-section of the silencing structure of burner nozzle for gas appliances in embodiment 25 of the present patent.

Figure 3 is a schematic diagram of a half-section structure of the silencing structure of burner nozzle for gas appliances in embodiment 1 of the present patent.

Figure 4 is a schematic diagram of an exploded structure of the silencing structure of burner nozzle for gas appliances in embodiment 1 5 of the present patent.

Figure 5 is a schematic diagram of the structure of the muffler in embodiment 1 of the present patent.

Figure 6 is a schematic diagram of a half-section structure of the silencing structure of burner nozzle for gas appliances in embodiment 2 10 of the present patent.

Figure 7 is a schematic diagram of a partial cross-section of the silencing structure of burner nozzle for gas appliances in embodiment 2 of the present patent.

Figure 8 is a schematic diagram of the structure of the muffler in 15 embodiment 3 of the present patent.

Figure 9 is a three-dimensional schematic diagram of the silencing structure of burner nozzle for gas appliances in embodiment 4 of the present patent.

Figure 10 is a schematic diagram of a half-section structure of the 20 silencing structure of burner nozzle for gas appliances in embodiment 4 of the present patent.

Figure 11 is a schematic diagram of a partial cross-section of the silencing structure of burner nozzle for gas appliances in embodiment 5 of the present patent.

The corresponding reference numeral parts in the accompanied figures are: 1-Nozzle; 11-Nozzle air inlet; 12-Nozzle air outlet; 2-Ejection tube; 21-Ejection tube air inlet; 22-Ejection tube air outlet; 23-Ejection hole; 5 3-Burner body; 4-Muffler; 41-Muffler shell; 42-Muffler body; 421-Small hole channel; 43-Combustion-supporting air channel; 44-Combustion-supporting air inlet.

Detail implementation In order to better understand the content of the present patent, further I() description will be given below in conjunction with specific embodiments and attached figures. It should be understood that these embodiments are only used to further illustrate the present patent, and are not used to limit the scope of the present patent. In addition, it should be understood that after reading the content of the present patent, those skilled in the art shall make some non-essential changes or adjustments to the present patent, which still belong to the protection scope of the present patent.

Embodiment 1 A silencing structure of burner nozzle for gas appliances, as shown in Figure 1-Figure 5, which comprises a nozzle 1, an ejection tube 2 matched and connected with the nozzle 1, a burner body 3 matched and connected with the ejection tube 2, and a muffler 4 arranged outside the nozzle 1 and the ejection tube 2. The muffler 4 includes a muffler shell 41 and a muffler body 42 matched and connected with the muffler shell 41. In this embodiment, there is one muffler body. The internal cavity of the muffler shell 41 forms a combustion-supporting air channel 43. The combustion-supporting air channel 43 is connected to the internal cavity of the ejection tube 2. The fuel gas ejected from the nozzle 1 enters the ejection tube 2. Due to the Venturi effect, the external combustion-supporting air passes through the muffler body 42 and the combustion-supporting air channel 43 sequentially and is drawn into the ejection tube 2. Fuel gas and combustion-supporting air is mixed in the ejection tube 2, and then the mixed gas enters the internal cavity of the burner body 3 for combustion. Due to the presence of the muffler shell 41 and the muffler body 42, the noise generated by the gas and combustion-supporting air is isolated in the inside of the muffler shell 41, and the noise is attenuated by the muffler body 42.

When the nozzle 1 ejects gas, the combustion-supporting air channel 43 provides primary combustion-supporting air, thereby isolating the flowing gas inside the muffler shell 41, which can effectively reduce the noise generated by the friction of the gas flow, and the sleeping of users will not be affected even if the corresponding gas appliance (gas fireplace) is used at night, and thus it is more user-friendly and more widely used.

As shown in Figure 5, the muffler body 42 includes a plurality of small hole channels 421.

As shown in Figure 5, there are a total of 23 small hole channels 421. The cross-sectional area of a single small hole of the small hole 20 channels 421 is about 10 mm2 As shown in Figure 5, the cross section of a single small hole of the small hole channels 421 is a hexagonal honeycomb structure.

As shown in Figure 5, the muffler body 42 is made of a porous material, and the pore diameter of the porous material is 0.2 mm.

As shown in Figure 2, the muffler shell 41 forms a combustion-supporting air inlet 44 in a horizontal direction. The muffler body 42 is provided at the combustion-supporting air inlet 44. The muffler body 42 is arranged horizontally so that the combustion-supporting air channel 43 connects with the space in front of the burner body 3.

As shown in Figure 3, the two ends of the nozzle 1 respectively form the nozzle air inlet 11 and the nozzle air outlet 12. The two ends of the ejection tube 2 respectively forin the ejection tube air inlet 21 and the ejection tube air outlet 22. The nozzle air outlet 12 is matched and connected with the ejection tube air inlet 21. The ejection tube air outlet 22 is connected to the internal cavity of the burner body 3.

As shown in Figure 3, the ejection tube 2 is arranged inside the burner body 3.

As shown in Figure 3, the ejection tube 2 and the burner body 3 are integral.

As shown in Figure 3, the nozzle air inlet 11 is arranged inside the 15 muffler. The nozzle air outlet 12 is arranged at the exterior of the muffler 4.

As shown in Figure 2-Figure 4, when the primary combustion-supporting air in the combustion-supporting air channel 43 enters the ejection tube 2, in order to limit and control the amount of the 20 primary combustion-supporting air entering the ejection tube 2, a plurality of ejection holes 23 is provided at the ejection tube air inlet 21. As shown in Figure 4, there are four ejection holes 23.

The working process of the silencing structure of burner nozzle for gas appliances in this embodiment: While working, a combustible gas of high-pressure and high-speed is sprayed from the nozzle 1. As the gas is in a high-speed flow state, under the action of the Venturi effect, an area of low-pressure state is formed inside the channel of the ejection tube 2, so that the air in the muffler shell 41 passes through the ejection holes 23 and enters the ejection tube 2 as primary combustion-supporting air. So, the fuel gas and primary combustion-supporting air is mixed in the ejection tube 2 and enters the internal cavity of the burner body 3 for combustion.

Since the combustion-supporting air channel 43 is a semi-closed space enclosed by the muffler shell 41, and connected with the space in front of the burner body 3 only through the muffler body 42, the combustion-supporting air channel 43 can collect the primary combustion-supporting air in front of the burner body 3 through the muffler body 42.

As the combustion-supporting air channel 43 is a semi-closed space, and the nozzle 1 is arranged inside the muffler shell 41, the muffler shell 41 can effectively prevent the noise generated by the air from the nozzle 1 and friction of the primary combustion-supporting air flow from spreading outward. The muffler body 42 is made of a porous material, and has a plurality of parallel hexagonal small hole channels 421. It is an impedance composite muffler structure, which can effectively eliminate noises of various frequencies and adjust the noise reduction effect to the best.

Embodiment 2 This embodiment is basically the same as embodiment 1. The difference is that compared with embodiment 1, as shown in Figure 6, the muffler shell 41 forms a combustion-supporting air inlet 44 in a vertical downward direction, and the muffler body 42 is arranged vertically downward, that is, when the combustion-supporting air channel 43 collects the primary combustion-supporting air, it is collected from below the burner body 3.

In addition, as shown in Figure 7, the cross section of the plurality of small hole channels 421 on the muffler body 42 is circular in shape. Embodiment 3 This embodiment is basically the same as embodiment 1. The difference is that compared with embodiment 1, as shown in Figure 8, the cross section of the muffler body 42 is circular in shape, and the axis is a curved structure, The axis of small hole channels 421 on the muffler body 42 is also a curved structure, and this curved structure can further hinder the propagation of sound waves, that is, make the noise reduction effect more obvious.

Embodiment 4 This embodiment is basically the same as embodiment 2. The difference is that compared with embodiment 2, as shown in Figure 9 and Figure 10, the ejection tube 2 is arranged outside the burner body 3, and inside the muffler 4. The nozzle air inlet 11 and the nozzle air outlet 12 are both arranged inside the muffler 4.

Embodiment 5 This embodiment is basically the same as embodiment 1. The 20 difference is that compared with embodiment 1, as shown in Figure 11, the muffler 4 is provided with two muffler bodies 42, correspondingly provided with two combustion-supporting air inlets 44.

The above description does not limit the present patent, and the present patent is not limited to the above examples. Changes, modifications, additions or substitutions made by those of ordinary skill in the art within the essential scope of the present patent shall also belong to the protection scope of the present patent.

Claims

What is claimed is: 1. A silencing structure of a burner nozzle for gas appliances, comprising a nozzle (1), an ejection tube (2) matched and connected with the nozzle (1), a burner body (3) matched and connected with the ejection tube (2), and a muffler (4) arranged outside the nozzle (1) and the ejection tube (2); the muffler (4) includes a muffler shell (41) and a plurality of muffler bodies (42) matched and connected with the muffler shell (41); the internal cavity of the muffler shell (41) forms a combustion-supporting air channel (43); the combustion-supporting air channel (43) is connected to the internal cavity of the ejection tube (2).
2. The silencing structure of a burner nozzle for gas appliances of Claim 1, wherein the muffler bodies (42) include a plurality of small hole channels (421).
3. The silencing structure of a burner nozzle for gas appliances of Claim 2, wherein the number of the small hole channels (421) is not less than 6.
4. The silencing structure of a burner nozzle for gas appliances of Claim 2, wherein the cross-sectional area of a single small hole of the small hole channels (421) is 4 mm2-20 mm2
5. The silencing structure of a burner nozzle for gas appliances of Claim 2, wherein the cross section of a single small hole of the small hole channels (421) is a hexagonal honeycomb structure.
6. The silencing structure of a burner nozzle for gas appliances of Claim 1, wherein the muffler (42) is made of a porous material, and the pore diameter of the porous material is 0.01 mm-0.5 mm.
7. The silencing structure of a burner nozzle for gas appliances of Claim 1, wherein one end of the muffler shell (41) forms a combustion-supporting air inlet (44); the muffler bodies (42) are provided at the combustion-supporting air inlet (44).
8. The silencing structure of a burner nozzle for gas appliances of Claim 1, wherein the two ends of the nozzle (I) respectively form the nozzle air inlet (11) and the nozzle air outlet (12); the two ends of the ejection tube (2) respectively form the ejection tube air inlet ( 21) and the ejection tube air outlet (22); the nozzle air outlet (12) is matched and connected with the ejection tube air inlet (21); the ejection tube air outlet (22) is connected to the internal cavity of the burner body (3); the ejection tube air inlet (21) is provided with a plurality of ejection holes (23).
9. The silencing structure of a burner nozzle for gas appliances of Claim 8, wherein the ejection tube (2) is arranged inside the burner body (3); the nozzle air inlet (11) is arranged inside the muffler; the nozzle air outlet (12) is arranged at the exterior of the muffler (4).
10. The silencing structure of a burner nozzle for gas appliances of Claim 8, wherein the ejection tube (2) is arranged outside the burner body (3); the nozzle air inlet (11) and the nozzle air outlet (12) are both arranged inside the muffler (4).