CN220707337U - Middle ring fire cover and combustor - Google Patents

Abstract

The middle ring fire cover is provided with a middle ring fire hole and an installation cavity for installing the center fire cover, a fire protection channel communicated with a first air inlet cavity of the center fire cover is arranged on the middle ring fire cover in a surrounding mode, and the fire protection channel is close to the thermocouple.

Description

Middle ring fire cover and combustor

Technical Field

The application belongs to gas equipment technical field, especially relates to a middle ring fire lid and combustor.

Background

The burner is widely applied to daily life, and different firepower is usually required in the process of using the burner, so that when the burner burns with small fire, the situation of flameout during the burning of the small fire is easy to occur. In order to ensure that the burner can normally burn on small fire, in the using process, a thermocouple plays a role in flameout and fire protection through detecting the combustion of flame, the thermocouple is close to the middle ring, the flame of the middle ring fire cover disappears when the small fire burns, basically only the inner ring fire cover and the thermocouple are in combustion when the small fire burns, the flame at the thermocouple is short and concentrated, flameout is easy, if the flame at the thermocouple fire protection position is extinguished, the flame of the inner ring fire cover cannot be ignited in time, flameout protection of the thermocouple can take effect to further control the burner to automatically close fire, and normal use of a user can be influenced.

Disclosure of Invention

The present application aims to solve, at least to some extent, the technical problem of unstable combustion of a burner. To this end, the present application provides a middle ring fire cover and burner.

In a first aspect, embodiments of the present application provide an intermediate fire cover,

the middle ring fire cover is provided with a middle ring fire hole and an installation cavity for installing the center fire cover, a fire protection channel communicated with the first air inlet cavity of the center fire cover is arranged on the middle ring fire cover in a surrounding mode, and the fire protection channel is close to the thermocouple.

In an alternative embodiment of the present application, the fire protection channel is disposed between the torches and the installation cavity.

In an alternative embodiment of the present application, a connection channel for connecting the fire protection channel and the first air intake cavity of the central fire cover is provided in the mounting cavity.

In an alternative embodiment of the present application, the inner wall of the installation cavity is provided with a communication groove, and the outer wall of the central fire cover is used for covering the opening of the communication groove to form the connection channel.

In an alternative embodiment of the present application, the connection channel and the fire protection channel form an included angle.

In an alternative embodiment of the present application, the fire protection channel has a fire protection groove and a fire protection hole which are mutually communicated, the fire protection groove is used for being close to the thermocouple, and the fire protection hole can be communicated with the fire protection groove and the first air inlet cavity of the central fire cover.

In an alternative embodiment of the present application, the middle fire cover includes a first fire dividing cover and a second fire dividing cover, the installation cavity is disposed in the first fire dividing cover, and the second fire dividing cover covers the opening of the installation cavity and is connected with the first fire dividing cover.

In an alternative embodiment of the present application, the fire protection hole and the fire protection groove are both disposed on the first fire dividing cover.

In an alternative embodiment of the present application, the fire protection hole is disposed on the first fire dividing cover, and a gap between the first fire dividing cover and the second fire dividing cover forms the fire protection groove.

In an optional embodiment of the present application, a connection cavity capable of communicating with the first air inlet cavity is provided between the first fire distributing cover and the second fire distributing cover, the connection cavity is annularly provided around the installation cavity, and the fire protecting hole is communicated with the connection cavity.

In an alternative embodiment of the present application, the connection between the fire protection hole and the connection cavity is higher than the connection between the fire protection hole and the fire protection groove.

In an alternative embodiment of the present application, the cross-sectional area of the fire protection hole is smaller than the cross-sectional area of the connecting chamber in a cross-section along the axis of the middle ring cover.

In a second aspect, embodiments of the present application provide a burner comprising a center fire cover and the middle fire cover.

The beneficial effects of the burner provided in the second aspect are the same as those of the middle fire cover provided in the first aspect, and are not described in detail here.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic structural diagram of a burner according to an embodiment of the present application.

Fig. 2 shows a cross-sectional view of the burner provided in fig. 1.

Fig. 3 shows a schematic structural view of a center fire cover and an intermediate fire cover of the burner provided in fig. 1.

Fig. 4 shows a top view of the center and middle ring covers of the burner provided in fig. 1.

Fig. 5 shows a partial enlarged view at a in fig. 3.

Reference numerals: 10-burner, 11-fire cover assembly, 110-middle fire cover, 112-middle fire hole, 113-first fire dividing cover, 114-second fire dividing cover, 115 a-mounting cavity, 115 b-connecting channel, 115 c-communicating slot, 115 d-connecting cavity, 120-center fire cover, 122-center fire hole, 130-outer ring fire cover, 132-outer ring fire hole, 140-fire protecting channel, 142 a-fire protecting slot, 142 b-fire protecting hole;

the device comprises a 12-gas distribution disc, a 12 a-first gas inlet cavity, a 12 b-second gas inlet cavity, a 13-thermocouple, a 14-furnace end, a 14 a-first injection cavity and a 14 b-second injection cavity.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that all the directional indicators in the embodiments of the present application are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.

In the present application, unless explicitly specified and limited otherwise, the terms "coupled," "secured," and the like are to be construed broadly, and for example, "secured" may be either permanently attached or removably attached, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In addition, descriptions such as those related to "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated in this application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.

The burner is widely applied to daily life, and different firepower is usually required in the process of using the burner, so that when the burner burns with small fire, the situation of flameout during the burning of the small fire is easy to occur. In order to ensure that the burner can normally burn on small fire, in the using process, a thermocouple plays a role in flameout and fire protection through detecting the combustion of flame, the thermocouple is close to the middle ring, the flame of the middle ring fire cover disappears when the small fire burns, basically only the central fire cover and the thermocouple are in combustion, the flame at the thermocouple is short and concentrated, flameout is easy, if the flame at the thermocouple fire protection position is extinguished, the flame at the central fire cover cannot be ignited in time, flameout protection of the thermocouple can take effect and further control the burner to automatically close fire, and normal use of a user can be influenced. The burner that this application embodiment provided can improve above-mentioned problem, and middle ring fire lid and the burner that this application embodiment provided can guarantee as far as possible when the little fire of burner burns that there is flame combustion all the time around the thermocouple, even also can in time reignite after the flame of thermocouple department extinguishes, has improved the stability of burner when little fire burns.

The present application is described below with reference to specific embodiments in conjunction with the accompanying drawings:

referring to fig. 1 and 2, arrows in fig. 2 indicate air flow directions. The embodiment of the application provides a middle ring fire lid 110 and combustor 10, and middle ring fire lid 110 combustor 10 that this application embodiment provided can guarantee as far as possible when little fire burns that there is flame combustion all the time around the thermocouple, even also can in time reignite after the flame of thermocouple 13 department extinguishes, has improved the stability of combustor 10 when little fire burns.

In the present embodiment, the middle ring fire cover 110 is applied to the burner 10, and the burner 10 includes: the fire cover assembly 11 and the thermocouple 13 are arranged in the fire cover assembly, and the fire cover assembly 12 is provided with a first air inlet cavity 12a and a second air inlet cavity 12b which are mutually independent; the fire cover assembly 11 includes a center fire cover 120 and an intermediate fire cover 110; the central fire cover 120 is arranged at intervals with the middle fire cover 110, and a central fire hole 122 communicated with the first air inlet cavity 12a is arranged on the central fire cover 120; the middle ring fire cover 110 is provided with a middle ring fire hole 112 communicated with the second air inlet cavity 12b; the thermocouple 13 is mounted on the gas distribution plate 12 and is disposed between the middle ring fire cover 110 and the outer ring fire cover 130.

Wherein, the middle ring fire cover 110 is provided with a fire protection channel 140 communicated with the first air inlet cavity 12a in a surrounding way, and the fire protection channel 140 is arranged close to the thermocouple 13.

In the embodiment of the present application, the central fire cover 120 is communicated with the first air inlet cavity 12a, the middle fire cover 110 is communicated with the second air inlet cavity 12b, when the burner 10 burns with big fire, the second air inlet cavity 12b is communicated with the middle fire hole 112, the first air inlet cavity 12a is communicated with the central fire hole 122, and the central fire hole 122 and the middle fire cover 110 respectively inlet air from two different cavities and burn simultaneously, so that the burner 10 can burn with big fire. When the burner 10 needs to burn with a low fire, the middle fire hole 112 is closed and only the center fire hole 122 burns, enabling the entire burner 10 to burn with a low fire. That is, it can be considered that the light fire burns when only the center fire hole 122 burns, and the heavy fire burns when the center fire hole 122 and the middle fire hole 112 burn simultaneously.

The fire protection channel 140 is close to the thermocouple 13, when the combustor 10 burns with small fire, the second air inlet cavity 12b is closed, only the first air inlet cavity 12a is opened, and the fire protection channel 140 is communicated with the first air inlet cavity 12a, so that fuel gas can enter the fire protection channel 140 even under the condition of small fire, the position of the thermocouple 13 can continuously have the fuel gas flowing out when the combustor 10 burns with small fire, the periphery of the thermocouple 13 can always keep a burning state, or the flame at the position of the thermocouple 13 can be quickly reburning after being blown out, and the stability of the small fire burning can be improved.

The fire protection channel 140 is annularly arranged on the middle ring fire cover 110, so that the fire protection channels 140 are arranged on the outer periphery of the middle ring fire cover 110, if the flame at the thermocouple 13 is extinguished, the annularly arranged fire protection channels 140 can timely supplement fuel gas to the thermocouple 13, so that sufficient fuel gas can be ensured at the thermocouple 13 during small fire combustion, the periphery of the thermocouple 13 can always keep a combustion state, or the flame at the thermocouple 13 can be quickly reburned after being blown out, and the stability of the small fire combustion can be improved.

The fire protection channel 140 is annularly arranged on the middle ring fire cover 110, so that the fuel gas in the first air inlet cavity 12a can flow into the fire protection channel 140 and spread on the periphery of the outer peripheral wall of the middle ring fire cover 110, so that the fuel gas can be gathered around the thermocouple 13, the condition that the periphery of the thermocouple 13 is always burnt when the burner 10 burns with small fire is ensured as much as possible, or the fuel gas can be quickly reburned after being blown out, and the stability of the burner 10 in the burning condition with small fire is improved.

As for the installation manner between the central fire cover 120 and the middle fire cover 110, an installation cavity 115a may be provided on the middle fire cover 110, and the central fire cover 120 is installed in the installation cavity 115a, that is, the middle fire cover 110 is fixedly connected with the gas distribution plate 12, and the central fire cover 120 is fixedly connected with the middle fire cover 110.

In the use state, the central fire hole 122 is disposed above the central fire cover 120, and the middle fire hole 112 is disposed on the outer circumferential surface of the middle fire cover 110, in other words, the central fire hole 122 burns upward, and the middle fire hole 112 burns around, so that the whole burner 10 can burn in different directions in the use state, and a divergent flame is formed.

Specifically, the central fire cover 120 may be a ceramic fire cover, and a honeycomb-shaped protrusion structure is disposed above the central fire cover 120, and the central fire hole 122 may be disposed on the protrusion structure.

Referring to fig. 3, 4 and 5, in some embodiments, the middle fire cover 110 includes a first fire dividing cover 113 and a second fire dividing cover 114, the installation cavity 115a is disposed in the first fire dividing cover 113, and the second fire dividing cover 114 is covered at an opening of the installation cavity 115a and is connected to the first fire dividing cover 113.

The first fire dividing cover 113 and the second fire dividing cover 114 are detachably connected, the first fire dividing cover 113 is installed on the middle ring fire cover 110, the central fire cover 120 is placed in the installation cavity 115a, and finally the second fire dividing cover 114 is covered and arranged at the opening of the installation cavity 115a, so that the central fire cover 120 is sealed in the installation cavity 115 a.

As for the first and second fire dividing covers 113 and 114, there may be various connection methods, which may be connected by means of a fixing member, specifically as follows:

the first fire dividing cover 113 is provided with a first fixing hole, the second fire maintaining cover is provided with a second fixing hole, and the combustor 10 further comprises a fixing piece which is arranged in the first fixing hole and the second fixing hole in a penetrating mode.

By locking the first fire dividing plate to the air dividing plate 12 by means of screws, the sealing of the first air inlet cavity 12a and the second air inlet cavity 12b is ensured. At the step where the center fire cover 120 is placed on the first fire dividing tray. And then the second fire dividing cover 114 is covered at the opening, and the fixing piece is locked in the first fixing hole and the second fixing hole, so that the second fire dividing cover 114 is fixed on the first fire dividing cover 113.

In addition, the connection can be realized by a screw mode, and the concrete steps are as follows: one of the first and second fire dividing covers 113 and 114 is provided with an internal thread, the other is provided with an external thread, and the first and second fire dividing covers 113 and 114 are connected by threads.

One of the first fire dividing cover 113 and the second fire dividing cover 114 is provided with an internal thread, and the other is provided with an external thread, which may be that the first fire dividing cover 113 is provided with an internal thread, and the second fire dividing cover 114 is provided with an external thread. The first ignition cover 113 may be provided with an external thread, and the second ignition cover 114 may be provided with an internal thread. Installation can be realized fast through the mode of screw thread, the dismouting of first fire lid 113 and second fire lid 114 is divided in the convenience.

In some embodiments, the gap between the first and second flame-dividing covers 113, 114 forms a side of the flame-holding channel 140 proximate to the thermocouple 13.

Because the first fire dividing cover 113 and the second fire dividing cover 114 are of split type structures, gaps may occur between the first fire dividing cover 113 and the second fire dividing cover 114 when the first fire dividing cover 113 and the second fire dividing cover 114 are assembled, one side of the fire protecting channel 140, which is close to the thermocouple 13, can be arranged at the gap between the first fire dividing cover 113 and the second fire dividing cover 114, the outer side of the fire protecting channel 140 can be arranged by utilizing the installation gaps of the first fire dividing cover 113 and the second fire dividing cover 114, and sealing procedures between the first fire dividing cover 113 and the second fire dividing cover 114 can be reduced, so that manufacturing cost is reduced.

It should be noted that the fire protection channel 140 has an outer side and an inner side. The medial and lateral sides are relative positions with respect to the firestop channel 140. Wherein, the inner side is the side near the first air inlet cavity 12a, the fuel gas is led into the fire keeping channel 140, and the outer side is the side near the thermocouple 13, and the fuel gas is led out. The side of the fire protection channel 140, which is close to the thermocouple 13, formed by the gap between the first fire division cover 113 and the second fire division cover 114 means that the outer side of the fire protection channel 140 is arranged at the gap between the first fire division cover 113 and the second fire division cover 114, and the arrangement position of the fire protection channel 140 is not limited, and may be arranged on the first fire division cover 113 or the second fire division cover 114.

In other embodiments, a fire protection channel 140 is provided on the second flame distributing cap 114 near one side of the thermocouple 13. That is, the outer side of the fire protection passage 140 is provided on the second flame distributing cover 114, more closely above the entire burner 10.

In other embodiments, a fire protection channel 140 is provided on the first fire dividing cover 113 near one side of the thermocouple 13. I.e., the outside of the fire protection channel 140 is provided on the first fire dividing cover 113, closer to the lower side of the burner 10.

As for the location of the fire protection channel 140, there may be various locations, and the fire protection channel 140 may be disposed on a side of the middle fire hole 112 away from the gas distribution plate 12, or may be disposed on a side of the middle fire hole 112 close to the gas distribution plate 12, and these two arrangements of the fire protection channel 140 will be specifically described below.

In some embodiments, the fire protection channel 140 is disposed on a side of the pilot hole 112 remote from the gas distribution plate 12. That is, the fire protection passage 140 is disposed above the middle fire hole 112, the middle fire hole 112 is disposed below the fire protection passage 140, the fire protection passage 140 communicates with the first air intake chamber 12a, and the middle fire hole 112 communicates with the second air intake chamber 12 b.

The first air inlet cavity 12a and the second air inlet cavity are two mutually independent cavities, the fire protection channel 140 and the central fire hole 122 are communicated with the first air inlet cavity 12a, the fire protection channel 140 is arranged above the middle fire hole 112, the fire protection channel 140 can be communicated with the first air inlet cavity 12a by utilizing the connecting channel 115b between the first air inlet cavity 12a and the central fire hole 122, the position arrangement of the fire protection channel 140 can be facilitated, and other channels formed in the middle fire cover 110 are reduced as far as possible to connect the first air inlet cavity 12a and the fire protection channel 140.

Because the fire protection channel 140 and the central fire hole 122 are simultaneously communicated with the first air inlet cavity 12a, if the central fire hole 122 is blocked by the overflow liquid, the gas in the first air inlet cavity 12a can be decompressed through the fire protection channel 140, so that the condition of gas backflow can be reduced as far as possible, and the safety of the burner 10 in the use process is ensured.

In some embodiments, a connecting passage 115b is provided between the middle ring fire cover 110 and the center fire cover 120 that communicates the first air intake chamber 12a and the fire protection passage 140.

Because the fire protection channel 140 is disposed above the middle ring fire hole 112, that is, the fire protection channel 140 is disposed near the center fire hole 122, one end of the connection channel 115b is communicated with the first air inlet cavity 12a, the other end is communicated with the fire protection channel 140, and after the fuel gas in the first air inlet cavity 12a enters into the connection channel 115b, the fuel gas flows upward along the direction of the connection channel 115b until entering into the fire protection channel 140, and then diffuses out of the middle ring fire cover 110 through the fire protection channel 140.

In some embodiments, the middle fire cover 110 has a mounting cavity 115a in which the center fire cover 120 is mounted, and the connecting channel 115b is disposed between an inner wall of the mounting cavity 115a and an outer wall of the center fire cover 120. The connecting channel 115b is arranged by utilizing the installation gap between the central fire cover 120 and the middle fire cover 110, the connecting channel 115b is not required to be additionally arranged on the middle fire cover 110, and only the connecting channel 115b is required to be communicated with the fire protection channel 140, so that the process of arranging other channels can be reduced by adopting the layout mode.

When the central fire cover 120 is assembled, the central fire cover 120 can be directly placed in the mounting cavity 115a, the central fire cover 120 can be randomly placed in 360 degrees, positioning is not needed, the operation is simple and convenient, and the manufacturing efficiency can be improved.

In some embodiments, the inner wall of the installation cavity 115a is provided with a communication groove 115c, and the outer wall of the center fire cover 120 is covered at the opening of the communication groove 115c to form a connection channel 115b.

The communication groove 115c is formed in the inner wall of the installation cavity 115a, the protruding portion of the inner wall of the installation cavity 115a may contact with the outer wall of the central fire cover 120, the protruding portion may play a role in fixing and installing the central fire cover 120, and the communication groove 115c is disposed along the axial direction of the central fire cover 120 and is the same as the air inlet direction of the central fire cover 120.

Since the fire protection channel 140 is annularly arranged on the middle ring fire cover 110, a plurality of communication grooves 115c can be arranged, and a plurality of communication grooves 115c are annularly arranged on the inner wall of the installation cavity 115a, so that the fuel gas at different positions of the first air inlet cavity 12a can enter different positions of the fire protection channel 140 through the communication grooves 115c at different positions. After the flame at the thermocouple 13 is extinguished, the flame-protecting channel 140 can timely supplement fuel gas, so that the thermocouple 13 can be quickly reburned, and the situation of misoperation of the thermocouple 13 is avoided as far as possible.

The plurality of communication grooves 115c are provided, and the plurality of communication grooves 115c are all through grooves, and can penetrate through the inner wall of the installation cavity 115a in the axial direction of the central fire cover 120, so that the first air inlet cavity 12a is convenient to communicate with the fire protection channel 140. The widths of any two communication grooves 115c may be the same or different, and the pitches between any adjacent two communication grooves 115c may be the same or different.

The depth of the communication groove 115c may be set according to the thickness of the medium ring fire cover 110 and the width of the communication groove 115c, and the ventilation amount of the communication groove 115c may be ensured within a certain range.

In some embodiments, the connecting channel 115b is disposed at an angle to the fire protection channel 140. The connection channel 115b is approximately vertically and upwards vented, the fire protection channel 140 is approximately horizontally vented, and the connection channel 115b and the fire protection channel 140 are arranged at an included angle, that is, the air flow directions of the connection channel 115b and the fire protection channel 140 are different, so that the structure of the middle ring fire cover 110 can be reasonably utilized, and the air inflow of the fire protection channel 140 is ensured.

The air flow direction of the connection channel 115b is different from the air flow direction of the fire protection channel 140, so that when the fuel gas enters the fire protection channel 140 from the connection channel 115b, the air flow can be buffered to a certain extent due to the different directions, the fuel gas and the air can be mixed again, and the fuel gas and the air can be mixed fully as much as possible.

In some embodiments, the fire protection channel 140 has a fire protection groove 142a and a fire protection hole 142b in communication with each other, the fire protection groove 142a being configured to be disposed proximate to the thermocouple 13, the fire protection hole 142b being capable of communicating the fire protection groove 142a with the first air intake chamber 12a of the center fire cover 120.

The fire protection groove 142a is annularly arranged on the outer peripheral wall of the middle ring fire cover 110, the fire protection holes 142b are communicated with the fire protection groove 142a and the connecting channel 115b, a plurality of fire protection holes 142b can be arranged on the bottom wall, close to the center fire cover 120, of the fire protection groove 142a, the fuel gas in the connecting channel 115b enters the fire protection groove 142a through the fire protection holes 142b, the fire protection holes 142b can play a certain role in buffering and limiting flow, the too high flow rate of the fuel gas blown out of the fire protection groove 142a can be avoided as far as possible, and the fuel gas is inconvenient to spread on the annular fire protection groove 142 a. After the gas enters the fire protection groove 142a from the fire protection hole 142b, if the flame at the thermocouple 13 is extinguished, the gas in the fire protection groove 142a can quickly flow to the thermocouple 13 for timely replenishment, and reburning in time.

In some embodiments, a connection cavity 115d capable of communicating with the first air intake cavity 12a is provided between the first and second ignition covers 113 and 114, the connection cavity 115d is disposed around the installation cavity 115a, and the fire protection hole 142b communicates with the connection cavity 115 d.

The first fire dividing cover 113 and the second fire dividing cover 114 have a certain gap, the gap is annularly arranged around the installation cavity 115a, namely, around the central fire cover 120, the connecting channel 115b is composed of a plurality of communicating grooves 115c arranged on the installation cavity 115a and the outer wall of the central fire cover 120, after the fuel gas enters the connecting cavity 115d through the plurality of communicating channels, the fuel gas can be collected in the connecting cavity 115d, the fuel gas is uniformly distributed in the connecting cavity 115d as much as possible, and then the fuel gas enters the fire preserving groove 142a after being divided by the plurality of fire preserving holes 142b, so that the fuel gas can enter different positions of the fire preserving groove 142a as uniformly as much as possible, the fuel gas can be uniformly distributed in the fire preserving groove 142a as much as possible, and the condition that the fuel gas is extinguished due to insufficient air supply can be reduced as much as possible. Because the fuel gas is uniformly distributed in the fire protection groove 142a, after the flame at the thermocouple 13 is extinguished, the fuel gas can be quickly supplemented and reburning is quickly performed.

In some embodiments, both the fire protection hole 142b and the fire protection groove 142a are provided on the first fire dividing cover 113.

Since the middle fire hole 112 is provided under the fire protection channel 140, that is, the middle fire hole 112 is provided under the fire protection groove 142a, and both the fire protection hole 142b and the fire protection groove 142a are provided on the first fire distributing cover 113, the middle fire hole 112 is also provided on the first fire distributing cover 113 and under the fire protection groove 142 a. The fire protection groove 142a and the fire protection hole 142b are arranged at the first fire dividing cover 113, so that the fire protection groove 142a and the fire protection hole 142b can be conveniently arranged, the middle fire hole 112 can be arranged below the fire protection channel 140, and the first fire dividing cover 113 and the second fire dividing cover 114 can be sealed during assembly.

Note that, the fire protection hole 142b is disposed inside, and the fire protection groove 142a is disposed outside, that is, the outer side of the fire protection channel 140 means the side of the fire protection groove 142a away from the fire protection hole 142b, and the inner side of the fire protection channel 140 means the side of the fire protection hole 142b close to the first air intake chamber 12a.

In some embodiments, the connection of the fire protection hole 142b to the connection chamber 115d is higher than the connection of the fire protection hole 142b to the fire protection groove 142 a. The directions of the axis of the fire protection hole 142b are different from the directions of the fire protection groove 142a, that is, the directions of the axis of the fire protection hole 142b and the directions of the fire protection groove 142a are set to form an included angle, so that a sufficient space can be reserved below the first fire distributing cover 113 to set the fire protection hole 112, and each part of the structure of the middle ring fire cover 110 can be reasonably utilized.

In addition, the connection between the fire-protecting hole 142b and the connecting chamber 115d is higher than the connection between the fire-protecting hole 142b and the fire-protecting groove 142a, which means that the fire-protecting hole 142b is inclined downward, and the connection between the fire-protecting hole 142b and the connecting chamber 115d is also higher than the connection between the connecting chamber 115d and the connecting channel 115b, and in the gas flow path, the gas flows upward through the connecting channel 115b into the connecting chamber 115d, mixes in the connecting chamber 115d, and flows obliquely upward into the fire-protecting hole 142 b. Enters the fire-protecting hole 142b, then flows obliquely downward, finally enters the fire-protecting groove 142a, and flows out of the substantially horizontal fire-protecting groove 142a to burn.

In the gas flowing process, the flowing directions of the gas in the connecting channel 115b, the connecting cavity 115d, the fire protection hole 142b and the fire protection groove 142a are different, the flowing direction of the gas can be changed for multiple times in the flowing process, a certain buffering and steady flow effect can be achieved on the gas, the situation that the gas flowing out of the fire protection groove 142a is too large in flow speed and cannot be fully combusted with air, and insufficient combustion occurs is avoided.

In some embodiments, the cross-sectional area of the fire protection aperture 142b is smaller than the cross-sectional area of the connecting cavity 115d in a cross-section along the axis of the middle ring fire cover 110.

The shape of the connection chamber 115d in the cross section of the axis of the middle ring cover 110 may be a regular shape or an irregular shape, and the shape of the connection chamber 115d may not be limited.

In the cross section of the axis of the middle ring fire cover 110, the cross section area of the connecting cavity 115d is larger than the cross section area of the fire protection hole 142b, when the fuel gas enters into the fire protection hole 142b from the connecting cavity 115d, the fuel gas enters into another narrower channel from a wider channel, the flow rate of the fuel gas is increased, and a certain flow force can be provided.

Referring to fig. 1 and 2, based on the same inventive concept, the embodiment of the present application further provides a burner 10, the burner 10 comprising: the fire cover assembly 11 and the thermocouple 13 are arranged in the fire cover assembly, and the fire cover assembly 12 is provided with a first air inlet cavity 12a and a second air inlet cavity 12b which are mutually independent; the fire cover assembly 11 includes a center fire cover 120 and an intermediate fire cover 110; the central fire cover 120 is arranged at intervals with the middle fire cover 110, and a central fire hole 122 communicated with the first air inlet cavity 12a is arranged on the central fire cover 120; the middle ring fire cover 110 is provided with a middle ring fire hole 112 communicated with the second air inlet cavity 12b; the thermocouple 13 is mounted on the gas distribution plate 12 and is disposed between the middle ring fire cover 110 and the outer ring fire cover 130. Wherein, the middle ring fire cover 110 is provided with a fire protection channel 140 communicated with the first air inlet cavity 12a in a surrounding way, and the fire protection channel 140 is arranged close to the thermocouple 13.

In some embodiments, the fire cover assembly 11 further includes an outer ring fire cover 130, the outer ring fire cover 130 is annularly disposed around the middle ring fire cover 110, the thermocouple 13 is disposed between the middle ring fire cover 110 and the outer ring fire cover 130, the outer ring fire cover 130 is provided with an outer ring fire hole 132, the outer ring fire hole 132 is communicated with the second air inlet cavity 12b, and the outer ring fire hole 132 and the middle ring fire hole 112 are simultaneously communicated with the second air inlet cavity 12 b. Similarly, the outer ring fire hole 132 is disposed on one side of the outer ring fire cover 130 far away from the middle ring fire hole 112, the outer ring fire hole 132 burns outwards, the middle ring fire hole 112 and the outer ring fire hole 132 form multi-layer combustion, and the multi-layer combustion can be mixed with air in different positions, so that fuel gas can be combusted fully as much as possible.

Wherein the central flame holes 122, the middle flame holes 112, and the outer ring flame holes 132 are simultaneously burned when the second air intake chamber 12b and the first air intake chamber 12a are simultaneously intake, in this state, the burner 10 can be considered as a high flame combustion. Only the first air intake chamber 12a is intake, and only the central flame hole 122 is burned, and in this state, the burner 10 can be considered to be a light flame combustion. In the use state, the gas distribution plate 12 is arranged below the fire cover assembly 11, the central fire hole 122 burns upwards, and the middle fire hole 112 and the outer ring fire hole 132 burn outwards.

In some embodiments, the burner 10 further includes a burner 14, where the burner 14 has a first ejection chamber 14a and a second ejection chamber 14b that are independent of each other, the first ejection chamber 14a communicates with the first air intake chamber 12a, and the second ejection chamber 14b communicates with the second air intake chamber 12b, and the first ejection chamber 14a may be disposed inside the second ejection chamber 14b for convenience in layout of the first ejection chamber 14a and the second ejection chamber 14 b.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (13)

1. A middle ring fire cover is characterized in that,

the middle ring fire cover (110) is provided with a middle ring fire hole (112) and a mounting cavity (115 a) for mounting the center fire cover (120), the middle ring fire cover (110) is provided with a fire protection channel (140) in a surrounding mode, the fire protection channel (140) is communicated with the first air inlet cavity (12 a) of the center fire cover (120), and the fire protection channel (140) is arranged close to the thermocouple (13).

2. The middle fire cover according to claim 1, wherein the fire protection channel (140) is arranged between the middle fire hole (112) and the mounting cavity (115 a).

3. The middle fire cover according to claim 2, wherein a connecting channel (115 b) for connecting the fire protection channel (140) and the first air inlet chamber (12 a) of the central fire cover (120) is arranged in the mounting chamber (115 a).

4. A middle fire cover according to claim 3, wherein the inner wall of the installation cavity (115 a) is provided with a communication groove (115 c), and the outer wall of the center fire cover (120) is used for covering the opening of the communication groove (115 c) to form the connecting channel (115 b).

5. A cover according to claim 3, wherein the connection channel (115 b) is arranged at an angle to the fire protection channel (140).

6. The middle ring fire cover according to any one of claims 1 to 5, wherein the fire protection channel (140) has a fire protection groove (142 a) and a fire protection hole (142 b) which are communicated with each other, the fire protection groove (142 a) is used for being arranged close to the thermocouple (13), and the fire protection hole (142 b) is capable of communicating the fire protection groove (142 a) with the first air inlet cavity (12 a) of the center fire cover (120).

7. The middle fire cover according to claim 6, wherein the middle fire cover (110) comprises a first fire dividing cover (113) and a second fire dividing cover (114), the installation cavity (115 a) is arranged in the first fire dividing cover (113), and the second fire dividing cover (114) covers the opening of the installation cavity (115 a) and is connected with the first fire dividing cover (113).

8. The middle fire cover according to claim 7, wherein the fire protection hole (142 b) and the fire protection groove (142 a) are both provided on the first fire dividing cover (113).

9. The middle fire cover according to claim 7, wherein the fire protection hole (142 b) is provided on the first fire dividing cover (113), and a gap between the first fire dividing cover (113) and the second fire dividing cover (114) forms the fire protection groove (142 a).

10. The middle ring fire cover according to claim 7, wherein a connecting cavity (115 d) capable of communicating with the first air inlet cavity (12 a) is arranged between the first fire dividing cover (113) and the second fire dividing cover (114), the connecting cavity (115 d) is annularly arranged around the mounting cavity (115 a), and the fire protecting hole (142 b) is communicated with the connecting cavity (115 d).

11. The middle ring fire cover according to claim 10, wherein the connection of the fire protection hole (142 b) and the connection chamber (115 d) is higher than the connection of the fire protection hole (142 b) and the fire protection groove (142 a).

12. The middle ring cover according to claim 10, wherein the cross-sectional area of the fire protection hole (142 b) is smaller than the cross-sectional area of the connection chamber (115 d) in a cross-section along the axis of the middle ring cover (110).

13. A burner comprising a central fire cover (120) and an intermediate fire cover (110) according to any one of claims 1 to 12.