Combustor and gas stove

Abstract

The combustor comprises a gas distribution disc, a fire cover assembly and a thermocouple. The gas distribution disc is provided with a first gas inlet cavity and a second gas inlet cavity which are independent of each other. The fire cover assembly comprises a central fire cover and a middle ring fire cover; the center fire cover and the middle ring fire cover are arranged in a spaced mode, and a center fire hole communicating with the first air inlet cavity is formed in the center fire cover. A middle ring fire hole communicated with the second air inlet cavity is formed in the middle ring fire cover; the thermocouple is mounted on the gas distribution disc and is arranged between the middle ring fire cover and the outer ring fire cover; a fire retaining channel communicated with the first air inlet cavity is annularly arranged on the middle ring fire cover, and the fire retaining channel is arranged close to the thermocouple.

Description

Technical Field

[0001] The present application belongs to the technical field of gas equipment, and in particular, relates to a burner and a gas stove. Background Art

[0002] Burners are widely used in daily life. In the process of using burners, different sizes of firepower are usually required. When the burner is burning at a low fire, it is easy to go out when the burner is burning at a low fire. In order to ensure that the burner can burn normally at a low fire, during use, the thermal couple plays the role of extinguishing the flame by checking the flame burning. The thermocouple is set close to the middle ring. When the fire is burning at a low fire, the flame of the middle ring fire cover disappears. Basically, only the inner ring fire cover and the thermocouple fire protection are burning. The flame at the thermocouple is short and concentrated, and it is very easy to go out. If the flame at the thermocouple fire protection is extinguished and the flame of the inner ring fire cover cannot ignite it in time, the flameout protection of the thermocouple will take effect and control the burner to automatically shut down, which will affect the normal use of the user. Summary of the invention

[0003] The present application aims to solve the technical problem of unstable combustion of a burner at least to a certain extent. To this end, the present application provides a burner and a gas stove.

[0004] In a first aspect, an embodiment of the present application provides a burner, comprising:

[0005] The air distribution plate has a first air inlet cavity and a second air inlet cavity which are independent of each other;

[0006] The fire cover assembly comprises a central fire cover and a middle ring fire cover; the central fire cover and the middle ring fire cover are arranged at intervals, the central fire cover is provided with the central fire hole communicating with the first air inlet cavity; the middle ring fire cover is provided with the middle ring fire hole communicating with the second air inlet cavity;

[0007] A thermocouple is installed on the gas distribution plate and arranged between the middle ring fire cover and the outer ring fire cover;

[0008] Wherein, a fire protection channel communicating with the first air inlet cavity is provided on the upper ring of the middle ring fire cover, and the fire protection channel is arranged close to the thermocouple.

[0009] In an optional embodiment of the present application, the fire protection channel is arranged on a side of the middle ring fire hole away from the gas distribution plate.

[0010] In an optional embodiment of the present application, a connecting channel connecting the first air inlet cavity and the fire protection channel is provided between the middle ring fire cover and the center fire cover.

[0011] In an optional embodiment of the present application, the central ring fire cover has an installation cavity for installing the central fire cover, and the connecting channel is arranged between the inner wall of the installation cavity and the outer wall of the central fire cover.

[0012] In an optional embodiment of the present application, a connecting groove is provided on the inner wall of the installation cavity, and the outer wall of the center fire cover covers the opening of the connecting groove to form the connecting channel.

[0013] In an optional embodiment of the present application, the connecting channel and the fire protection channel are arranged at an angle.

[0014] In an optional embodiment of the present application, the fire protection channel is arranged on a side of the middle ring fire hole close to the gas distribution plate.

[0015] In an optional embodiment of the present application, a partition is provided in the fire protection channel to divide the fire protection channel into a first slot section and a second slot section, and a connecting hole connecting the first slot section and the second slot section is provided on the partition, the first slot section is connected to the first air inlet cavity, and the second slot section is arranged close to the thermocouple.

[0016] In an optional embodiment of the present application, the first slot segment and the second slot segment are arranged at an angle.

[0017] In an optional embodiment of the present application, the first slot section is arranged below the second slot section.

[0018] In an optional embodiment of the present application, the center fire cover includes a first fire distribution cover and a second fire distribution cover, the first fire distribution cover is installed on the gas distribution plate, the first fire distribution cover is provided with an installation cavity, the center fire cover is installed in the installation cavity, the second fire distribution cover covers the opening of the installation cavity and is connected to the first fire distribution cover, and the center ring fire hole is provided on the first fire distribution cover or the second fire distribution cover.

[0019] In an optional embodiment of the present application, the gap between the first fire distribution cover and the second fire distribution cover forms a side of the fire protection channel close to the thermocouple.

[0020] In an optional embodiment of the present application, the side of the fire protection channel close to the thermocouple is arranged on the second fire distribution cover.

[0021] In an optional embodiment of the present application, the fire protection channel is arranged on the first fire distribution cover on a side close to the thermocouple.

[0022] In a second aspect, an embodiment of the present application provides a gas stove, comprising the burner provided in the first aspect.

[0023] The beneficial effects of the gas stove provided in the second aspect are the same as the beneficial effects of the burner provided in the first aspect, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A schematic structural diagram of a burner provided in an embodiment of the present application is shown.

[0026] Figure 2 Shows Figure 1 A cross-sectional view of a burner is provided.

[0027] Figure 3 Shows Figure 1 A schematic diagram of the structure of the center fire cover and the center ring fire cover of the burner is provided.

[0028] Figure 4 Shows Figure 1 Top view of the center fire cover and center ring fire cover of the burner provided.

[0029] Figure 5 Shown in Figure 3 A partial enlarged view of point A in the middle.

[0030] Figure 6 A connection method of the first ignition distribution cover and the gas distribution plate is shown.

[0031] Figure 7 A schematic structural diagram of another burner provided in an embodiment of the present application is shown.

[0032] Figure 8 Shows Figure 7 A cross-sectional view of a burner is provided.

[0033] Fig. 9 Shows Figure 7 A schematic diagram of the structure of the center fire cover and the center ring fire cover of the burner is provided.

[0034] Fig.10 Shown in Fig. 9 A partial enlarged view of point B in the middle.

[0035] Reference numerals: 10-burner, 11-fire cover assembly, 110-middle ring fire cover, 112-middle ring fire hole, 113-first fire distribution cover, 113a-first fixing hole, 114-second fire distribution cover, 115a-installation cavity, 115b-connecting channel, 115c-connecting groove, 115d-connecting cavity, 120-center fire cover, 122-center fire hole, 130-outer ring fire cover, 132-outer ring fire hole, 140-fire protection channel, 142a-fire protection groove, 142b-fire protection hole, 144a-partition plate, 144b-first groove section, 144c-second groove section, 144d-connecting hole;

[0036] 12-gas distribution plate, 12a-first air inlet cavity, 12b-second air inlet cavity, 12c-second fixing hole, 13-thermocouple, 14-furnace head, 14a-first ejection cavity, 14b-second ejection cavity, 15-fixing part. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0039] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0041] Burners are widely used in daily life. In the process of using burners, different sizes of firepower are usually required. When the burner is burning at a low fire, it is easy to go out when the burner is burning at a low fire. In order to ensure that the burner can burn normally at a low fire, during use, the hot spot couple plays the role of extinguishing the flame by checking the flame burning. The thermocouple is set close to the middle ring. When the burner is burning at a low fire, the flame of the middle ring fire cover disappears. Basically, only the inner ring fire cover and the thermocouple fire protection are burning. The flame at the thermocouple is short and concentrated, and it is very easy to go out. If the flame at the thermocouple fire protection is extinguished, the flame of the inner ring fire cover cannot ignite it in time, and the flame-out protection of the thermocouple will take effect and control the burner to automatically shut down, which will affect the normal use of the user. The burner provided in the embodiment of the present application can improve the above-mentioned problems. The burner provided in the embodiment of the present application can ensure that there is always a flame burning around the hot spot couple as much as possible when the burner is burning at a low fire. Even if the flame at the thermocouple is extinguished, it can be reignited in time, which improves the stability of the burner when burning at a low fire.

[0042] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0043] See also Figure 1 and Figure 2 The embodiment of the present application provides a burner 10. The burner 10 provided in the embodiment of the present application can ensure that there is always flame burning around the thermocouple when the fire is burning at a low fire. Even if the flame at the thermocouple 13 is extinguished, it can be reignited in time, thereby improving the stability of the burner 10 when the fire is burning at a low fire.

[0044] In the embodiment of the present application, the burner 10 includes: a gas distribution plate 12, a fire cover assembly 11 and a thermocouple 13, the gas distribution plate 12 has a first air inlet cavity 12a and a second air inlet cavity 12b which are independent of each other; the fire cover assembly 11 includes a central fire cover 120 and a middle ring fire cover 110; the central fire cover 120 and the middle ring fire cover 110 are arranged at intervals, and the central fire cover 120 is provided with a central fire hole 122 which is connected to the first air inlet cavity 12a; the middle ring fire cover 110 is provided with a middle ring fire hole 112 which is connected to the second air inlet cavity 12b; the thermocouple 13 is installed on the gas distribution plate 12, and is arranged between the middle ring fire cover 110 and the outer ring fire cover 130.

[0045] A fire protection passage 140 communicating with the first air inlet cavity 12 a is disposed on the middle ring fire cover 110 , and the fire protection passage 140 is disposed close to the thermocouple 13 .

[0046] In the embodiment of the present application, the central fire cover 120 is connected to the first air inlet chamber 12a, and the middle ring fire cover 110 is connected to the second air inlet chamber 12b. When the burner 10 is burning with a high fire, the second air inlet chamber 12b is connected to the middle ring fire hole 112, and the first air inlet chamber 12a is connected to the central fire hole 122. The central fire hole 122 and the middle ring fire cover 110 respectively take in air from two different chambers and burn at the same time, so that the burner 10 can burn with a relatively large fire. When the burner 10 needs to burn with a low fire, the middle ring fire hole 112 is closed, and only the central fire hole 122 burns, so that the entire burner 10 can burn with a low fire. In other words, it can be considered that when only the central fire hole 122 burns, it is burning with a low fire, and when the central fire hole 122 and the middle ring fire hole 112 burn at the same time, it is burning with a high fire.

[0047] The fire protection channel 140 is arranged close to the thermocouple 13. When the burner 10 is burning at a low fire, the second air inlet chamber 12b is closed and only the first air inlet chamber 12a is opened. The fire protection channel 140 is connected to the first air inlet chamber 12a, so that gas can enter the fire protection channel 140 even under a low fire. When the burner 10 is burning at a low fire, gas can continue to flow out of the thermocouple 13, so that the area around the thermocouple 13 can always maintain a burning state, or the flame at the thermocouple 13 can quickly reignite after being blown out, which can improve the stability of low-fire combustion.

[0048] The fire-keeping channel 140 is arranged on the middle ring fire cover 110 so that the fire-keeping channel 140 is arranged on the outer periphery of the middle ring fire cover 110. If the flame at the thermocouple 13 is extinguished, the fire-keeping channel 140 can replenish the gas to the thermocouple 13 in time to ensure that there is sufficient gas at the thermocouple 13 when a small fire is burning, so that the area around the thermocouple 13 can always maintain a burning state, or the flame at the thermocouple 13 can be quickly reignited after being blown out, which can improve the stability of the small fire combustion.

[0049] Among them, the fire protection channel 140 is arranged on the middle ring fire cover 110, so that the gas in the first air inlet cavity 12a can flow into the fire protection channel 140 and diffuse on the periphery of the outer wall of the middle ring fire cover 110, so that the gas can gather around the thermocouple 13, and ensure as much as possible that the area around the thermocouple 13 of the burner 10 always maintains a burning state when the burner 10 is burning at a low fire, or the gas can quickly reignite after being blown out, thereby improving the stability of the burner 10 in the low fire burning state.

[0050] As for the installation method between the central fire cover 120 and the middle ring fire cover 110, an installation cavity 115a can be set on the middle ring fire cover 110, and the central fire cover 120 is installed in the installation cavity 115a, that is, the middle ring fire cover 110 is fixedly connected to the gas distribution plate 12, and the central fire cover 120 is fixedly connected to the middle ring fire cover 110.

[0051] When in use, the center fire hole 122 is arranged above the center fire cover 120, and the middle ring fire hole 112 is arranged on the outer peripheral surface of the middle ring fire cover 110. In other words, the center fire hole 122 burns upward, and the middle ring fire hole 112 burns all around, so that the entire burner 10 can burn in different directions when in use, forming a divergent flame.

[0052] Specifically, the central fire cover 120 may be a ceramic fire cover, and a honeycomb-shaped protruding structure is disposed above the central fire cover 120 , and the central fire hole 122 may be disposed on the protruding structure.

[0053] In some embodiments, the fire cover assembly 11 further includes an outer ring fire cover 130, the outer ring fire cover 130 is arranged around the middle ring fire cover 110, the thermocouple 13 is arranged between the middle ring fire cover 110 and the outer ring fire cover 130, and an outer ring fire hole 132 is arranged on the outer ring fire cover 130, the outer ring fire hole 132 is connected to the second air inlet cavity 12b, and the outer ring fire hole 132 and the middle ring fire hole 112 are simultaneously connected to the second air inlet cavity 12b. Similarly, the outer ring fire hole 132 is arranged on the side of the outer ring fire cover 130 away from the middle ring fire hole 112, and the outer ring fire hole 132 burns outward, and the middle ring fire hole 112 and the outer ring fire hole 132 form a multi-layer combustion, which can be mixed with air at different positions, so that the gas can burn as fully as possible.

[0054] Among them, when the second air inlet cavity 12b and the first air inlet cavity 12a are simultaneously inlet, the central fire hole 122, the middle ring fire hole 112 and the outer ring fire hole 132 burn simultaneously. In this state, it can be considered that the burner 10 is burning with a large fire. When only the first air inlet cavity 12a is inlet, only the central fire hole 122 burns. In this state, it can be considered that the burner 10 is burning with a small fire. In the use state, the gas distribution plate 12 is arranged below the fire cover assembly 11, the central fire hole 122 burns upward, and the middle ring fire hole 112 and the outer ring fire hole 132 burn outward.

[0055] See also Figure 3 , Figure 4 and Figure 5 In some embodiments, the middle ring fire cover 110 includes a first fire separation cover 113 and a second fire separation cover 114 , the installation cavity 115a is arranged in the first fire separation cover 113 , the second fire separation cover 114 covers the opening of the installation cavity 115a and is connected to the first fire separation cover 113 .

[0056] 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, and then the center fire cover 120 is placed in the installation cavity 115a. Finally, the second fire dividing cover 114 is covered on the opening of the installation cavity 115a, so as to seal the center fire cover 120 in the installation cavity 115a.

[0057] See also Figure 6 , wherein the first fire distribution cover 113 is connected to the gas distribution plate 12. As for the first fire distribution cover 113 and the gas distribution plate 12, there are multiple connection methods, which can be connected by a fixing member 15, as follows:

[0058] The first fire distribution cover 113 is provided with a first fixing hole 113 a , the gas distribution plate 12 is provided with a second fixing hole 12 c , and the fixing member 15 is inserted into the first fixing hole 113 a and the second fixing hole 12 c .

[0059] In addition, the connection can also be made by means of screws, as follows: one of the first fire distribution cover 113 and the gas distribution plate 12 is provided with an internal thread, and the other is provided with an external thread, and the first fire distribution cover 113 and the gas distribution plate 12 are connected by threads.

[0060] As for the first ignition cover 113 and the second ignition cover 114, there can be a variety of connection methods, and they can be connected by screws, as follows: one of the first ignition cover 113 and the second ignition cover 114 is provided with an internal thread, and the other is provided with an external thread, and the first ignition cover 113 and the second ignition cover 114 are connected by threads.

[0061] One of the first fire distribution cover 113 and the second fire distribution cover 114 is provided with an internal thread and the other is provided with an external thread. The first fire distribution cover 113 may be provided with an internal thread and the second fire distribution cover 114 may be provided with an external thread. Alternatively, the first fire distribution cover 113 may be provided with an external thread and the second fire distribution cover 114 may be provided with an internal thread. The threaded method allows for quick installation, making it convenient to disassemble and assemble the first fire distribution cover 113 and the second fire distribution cover 114.

[0062] In some embodiments, the gap between the first ignition cover 113 and the second ignition cover 114 forms a fire protection channel 140 close to one side of the thermocouple 13 .

[0063] Since the first fire dividing cover 113 and the second fire dividing cover 114 are of split structure, a gap may appear between the first fire dividing cover 113 and the second fire dividing cover 114 when assembling the first fire dividing cover 113 and the second fire dividing cover 114. The fire keeping channel 140 can be arranged at the gap between the first fire dividing cover 113 and the second fire dividing cover 114 on one side close to the thermocouple 13. The outer side of the fire keeping channel 140 can be arranged by utilizing the installation gap between the first fire dividing cover 113 and the second fire dividing cover 114. The sealing process between the first fire dividing cover 113 and the second fire dividing cover 114 can be reduced, thereby reducing the manufacturing cost.

[0064] It should be noted that the fire protection channel 140 has an outer side and an inner side. The inner side and the outer side refer to the relative positions of the fire protection channel 140. Among them, the inner side refers to the side close to the first air inlet chamber 12a, which introduces the gas into the fire protection channel 140, and the outer side refers to the side close to the thermocouple 13, which is used to lead out the gas. The gap between the first fire distribution cover 113 and the second fire distribution cover 114 forms the fire protection channel 140. The side close to the thermocouple 13 refers to the outer side of the fire protection channel 140 is set at the gap between the first fire distribution cover 113 and the second fire distribution cover 114. As for the setting position of the fire protection channel 140, it is not limited, and it can be set on the first fire distribution cover 113 or on the second fire distribution cover 114.

[0065] In some other embodiments, the side of the fire-keeping channel 140 close to the thermocouple 13 is arranged on the second fire-distribution cover 114. That is to say, the outer side of the fire-keeping channel 140 is arranged on the second fire-distribution cover 114, closer to the top of the entire burner 10.

[0066] In some other embodiments, the side of the fire protection channel 140 close to the thermocouple 13 is arranged on the first fire distribution cover 113. That is, the outer side of the fire protection channel 140 is arranged on the first fire distribution cover 113, closer to the bottom of the burner 10.

[0067] As for the position of the fire protection channel 140, there can be multiple options. The fire protection channel 140 can be set on the side of the middle ring fire hole 112 away from the gas distribution plate 12, or it can be set on the side of the middle ring fire hole 112 close to the gas distribution plate 12. The following will specifically explain these two settings of the fire protection channel 140.

[0068] In some embodiments, the fire protection channel 140 is arranged on the side of the middle ring fire hole 112 away from the gas distribution plate 12. That is, the fire protection channel 140 is arranged above the middle ring fire hole 112, and the middle ring fire hole 112 is arranged below the fire protection channel 140. The fire protection channel 140 is connected to the first air inlet cavity 12a, and the middle ring fire hole 112 is connected to the second air inlet cavity 12b.

[0069] The first air inlet cavity 12a and the second air inlet cavity are two independent chambers, and the fire protection channel 140 and the central fire hole 122 are both connected to the first air inlet cavity 12a. The fire protection channel 140 is arranged above the middle ring fire hole 112, and the connecting channel 115b between the first air inlet cavity 12a and the central fire hole 122 can be used to connect the fire protection channel 140 with the first air inlet cavity 12a, which can facilitate the position arrangement of the fire protection channel 140 and minimize the need to open other channels on the middle ring fire cover 110 to connect the first air inlet cavity 12a and the fire protection channel 140.

[0070] Since the fire protection channel 140 and the central fire hole 122 are connected to the first air inlet chamber 12a at the same time, if the central fire hole 122 is blocked by overflow, the gas in the first air inlet chamber 12a can be depressurized through the fire protection channel 140, which can minimize the reflux of gas and ensure the safety of the burner 10 during use.

[0071] In some embodiments, a connecting channel 115 b is provided between the middle ring fire cover 110 and the center fire cover 120 , which connects the first air inlet cavity 12 a and the fire protection channel 140 .

[0072] Since the fire protection channel 140 is arranged above the middle ring fire hole 112, that is, the fire protection channel 140 is arranged close to the central fire hole 122, one end of the connecting channel 115b is connected to the first air inlet cavity 12a, and the other end is connected to the fire protection channel 140. After the gas in the first air inlet cavity 12a enters the connecting channel 115b, it flows upward along the direction of the connecting channel 115b until it enters the fire protection channel 140, and then diffuses to the outside of the middle ring fire cover 110 through the fire protection channel 140.

[0073] In some embodiments, the middle ring fire cover 110 has an installation cavity 115a for installing the center fire cover 120, and the connecting channel 115b is arranged between the inner wall of the installation cavity 115a and the outer wall of the center fire cover 120. The connecting channel 115b is arranged by utilizing the installation gap between the center fire cover 120 and the middle ring fire cover 110, and there is no need to arrange the connecting channel 115b on the middle ring fire cover 110. It is only necessary to connect the connecting channel 115b with the fire protection channel 140. This layout can reduce the process of opening other channels.

[0074] When assembling the center fire cover 120, the center fire cover 120 can be directly placed in the installation cavity 115a. The center fire cover 120 can be placed 360 degrees at will without positioning, which is easy to operate and can improve manufacturing efficiency.

[0075] In some embodiments, the inner wall of the installation cavity 115a is provided with a connecting groove 115c, and the outer wall of the center fire cover 120 covers the opening of the connecting groove 115c to form a connecting channel 115b.

[0076] A connecting groove 115c is opened on the inner wall of the installation cavity 115a, and the protruding portion of the inner wall of the installation cavity 115a can contact the outer wall of the center fire cover 120. The protruding portion can play a role in fixing and installing the center fire cover 120. The connecting groove 115c is arranged along the axial direction of the center fire cover 120, which is the same as the air intake direction of the center fire cover 120.

[0077] Since the fire protection channel 140 is arranged on the middle ring fire cover 110, a plurality of communication grooves 115c can be provided, and the plurality of communication grooves 115c are arranged on the inner wall of the installation cavity 115a, so that the 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 fire protection channel 140 can replenish the gas in time, so that the thermocouple 13 can be quickly reignited, and the misoperation of the thermocouple 13 can be avoided as much as possible.

[0078] There are multiple communicating grooves 115c, all of which are through grooves that can penetrate the inner wall of the installation cavity 115a in the axial direction of the central fire cover 120, so as to facilitate the communication between the first air inlet cavity 12a and the fire protection channel 140. The widths of any two communicating grooves 115c can be the same or different, and the spacing between any two adjacent communicating grooves 115c can be the same or different.

[0079] As for the depth of the connecting groove 115c, it can be set according to the thickness of the middle ring fire cover 110 and the width of the connecting groove 115c, as long as the ventilation volume of the connecting groove 115c is within a certain range.

[0080] In some embodiments, the connecting channel 115b is arranged at an angle to the fire protection channel 140. The connecting channel 115b discharges air approximately vertically upward, and the fire protection channel 140 discharges air approximately horizontally. The connecting channel 115b and the fire protection channel 140 are arranged at an angle, that is, the airflow directions of the connecting channel 115b and the fire protection channel 140 are different, and the structure of the middle ring fire cover 110 can be reasonably utilized to ensure the air intake of the fire protection channel 140.

[0081] The airflow direction of the connecting channel 115b is different from that of the fire protection channel 140. When the gas enters the fire protection channel 140 from the connecting channel 115b, the different directions of the two can buffer the airflow to a certain extent, so that the gas and air can be mixed again, and the gas and air can be mixed as fully as possible.

[0082] In some embodiments, the fire protection channel 140 has a fire protection groove 142a and a fire protection hole 142b that are interconnected. The fire protection groove 142a is used to be set close to the thermocouple 13, and the fire protection hole 142b can connect the fire protection groove 142a and the first air inlet cavity 12a of the center fire cover 120.

[0083] The fire-keeping groove 142a is arranged on the outer peripheral wall of the middle ring fire cover 110, and the fire-keeping hole 142b connects the fire-keeping groove 142a and the connecting channel 115b. A plurality of fire-keeping holes 142b can be provided, and the plurality of fire-keeping holes 142b are arranged on the bottom wall of the fire-keeping groove 142a close to the central fire cover 120. The gas in the connecting channel 115b enters the fire-keeping groove 142a through the fire-keeping holes 142b. The fire-keeping holes 142b can play a certain role of buffering and limiting flow, and can avoid as much as possible that the gas flow rate blown out from the fire-keeping groove 142a is too large, and it is not convenient to spread on the annular fire-keeping groove 142a. When the gas enters the fire-keeping groove 142a from the fire-keeping hole 142b, if the flame at the thermocouple 13 is extinguished, the gas in the fire-keeping groove 142a can quickly flow to the thermocouple 13 to be replenished in time and reignite in time.

[0084] In some embodiments, a connecting cavity 115d capable of communicating with the first air inlet cavity 12a is provided between the first ignition cover 113 and the second ignition cover 114. The connecting cavity 115d is arranged around the installation cavity 115a, and the fire retaining hole 142b is communicated with the connecting cavity 115d.

[0085] There is a certain gap between the first fire-spreading cover 113 and the second fire-spreading cover 114, and the gap is arranged around the installation cavity 115a, that is, around the center fire cover 120. The connecting channel 115b is composed of the connecting groove 115c arranged on the installation cavity 115a and the outer wall of the center fire cover 120. There are multiple connecting channels. After the gas enters the connecting cavity 115d through multiple connecting channels, it can be collected in the connecting cavity 115d, so that the gas is evenly distributed in the connecting cavity 115d as much as possible, and then enters the fire-keeping groove 142a after being diverted by multiple fire-keeping holes 142b, so that the gas can enter different positions of the fire-keeping groove 142a as evenly as possible, so that the gas can be evenly distributed in the fire-keeping groove 142a as much as possible, and the situation of local gas extinguishing due to insufficient gas supply can be reduced as much as possible. Since the gas is evenly distributed in the fire-keeping groove 142a, when the flame at the thermocouple 13 is extinguished, the gas can be quickly replenished and quickly re-ignited.

[0086] In some embodiments, the fire protection hole 142 b and the fire protection groove 142 a are both disposed on the first fire distribution cover 113 .

[0087] Since the middle ring fire hole 112 is arranged below the fire protection passage 140, that is, the middle ring fire hole 112 is arranged below the fire protection groove 142a, and the fire protection hole 142b and the fire protection groove 142a are both arranged on the first fire distribution cover 113, the middle ring fire hole 112 is also arranged on the first fire distribution cover 113 and arranged below the fire protection groove 142a. Providing the fire protection groove 142a and the fire protection hole 142b on the first fire distribution cover 113 can facilitate the position arrangement of the fire protection groove 142a and the fire protection hole 142b, and the middle ring fire hole 112 can be arranged below the fire protection passage 140, and the first fire distribution cover 113 and the second fire distribution cover 114 can be sealed during assembly.

[0088] It should be noted that the fire protection hole 142b is arranged inside and the fire protection groove 142a is arranged outside, that is, the outer side of the fire protection channel 140 refers to 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 refers to the side of the fire protection hole 142b close to the first air inlet cavity 12a.

[0089] In some embodiments, the connection between the fire-keeping hole 142b and the connecting cavity 115d is higher than the connection between the fire-keeping hole 142b and the fire-keeping groove 142a. This indicates that the axial direction of the fire-keeping hole 142b is different from the direction of the fire-keeping groove 142a, that is, the axial direction of the fire-keeping hole 142b and the direction of the fire-keeping groove 142a are arranged at an angle, so that sufficient space can be reserved below the first fire-dividing cover 113 to arrange the middle ring fire hole 112, and various parts of the middle ring fire cover 110 can be reasonably used.

[0090] In addition, the connection between the fire-keeping hole 142b and the connecting cavity 115d is higher than the connection between the fire-keeping hole 142b and the fire-keeping groove 142a, which means that the fire-keeping hole 142b is tilted downward, and the connection between the fire-keeping hole 142b and the connecting cavity 115d is also higher than the connection between the connecting cavity 115d and the connecting channel 115b. In the flow path of the gas, the gas first flows upward through the connecting channel 115b and enters the connecting cavity 115d, then mixes in the connecting cavity 115d, and then flows obliquely upward to enter the fire-keeping hole 142b. After entering the fire-keeping hole 142b, it flows obliquely downward, and finally enters the fire-keeping groove 142a, flows out from the approximately horizontal fire-keeping groove 142a, and then burns.

[0091] During the flow of gas, the flow directions of the gas in the connecting channel 115b, the connecting cavity 115d, the fire-keeping hole 142b and the fire-keeping groove 142a are all different. The gas can change its flow direction multiple times during the flow process, which can play a certain role in buffering and stabilizing the flow of the gas, thereby preventing the gas flow rate flowing out of the fire-keeping groove 142a from being too high, unable to fully burn with the air, and resulting in incomplete combustion.

[0092] In some embodiments, in a cross section along the axis of the middle ring fire cover 110 , a cross-sectional area of ​​the fire protection hole 142 b is smaller than a cross-sectional area of ​​the connecting cavity 115 d .

[0093] The fire protection hole 142b is cylindrical, and the shape of the connecting cavity 115d on the cross section of the axis of the middle ring fire cover 110 can be regular or irregular, and the shape of the connecting cavity 115d is not limited.

[0094] On the cross section of the axis of the middle ring fire cover 110, the cross-sectional area of ​​the connecting cavity 115d is larger than the cross-sectional area of ​​the fire protection hole 142b. When the gas enters the fire protection hole 142b from the connecting cavity 115d, it enters from a wider channel to another narrower channel, and the flow rate of the gas will increase, which can provide a certain flow force.

[0095] In addition to arranging both the fire keeping hole 142b and the fire keeping groove 142a on the first fire dividing cover 113, in some other embodiments, the fire keeping hole 142b can also be arranged on the first fire dividing cover 113, and the gap between the first fire dividing cover 113 and the second fire dividing cover 114 forms the fire keeping groove 142a.

[0096] The above scheme introduces a specific layout in which the fire protection channel 140 is set above the middle ring fire hole 112. In addition, the fire protection channel 140 can also be set below the middle ring fire hole 112. The structure in which the fire protection channel 140 is set below the middle ring fire hole 112 will be specifically introduced below.

[0097] See also Figure 7 and Figure 8 In some other embodiments, the fire protection channel 140 can also be arranged on the side of the middle ring fire hole 112 close to the gas distribution plate 12. That is, the fire protection channel 140 is arranged below the middle ring fire hole 112, and the middle ring fire hole 112 is arranged above the fire protection channel 140.

[0098] See also Fig. 9 and Fig.10 In some embodiments, a partition 144a is provided in the fire protection channel 140 to divide the fire protection channel 140 into a first slot section 144b and a second slot section 144c. A connecting hole 144d connecting the first slot section 144b and the second slot section 144c is provided on the partition 144a. The first slot section 144b is connected to the first air inlet cavity 12a, and the second slot section 144c is arranged close to the thermocouple 13.

[0099] The side of the first slot section 144b close to the first air inlet cavity 12a is the inner side of the fire protection channel 140, and the side of the second slot section 144c close to the thermocouple 13 is the outer side of the fire protection channel 140. The first slot section 144b and the second slot section 144c are provided with a partition 144a, and it can be considered that the partition 144a is provided at the bottom of the second slot section 144c. After the gas in the first air inlet cavity 12a enters the first slot section 144b from the bottom of the first slot section 144b, it enters the second slot section 144c through the connecting hole 144d on the partition 144a, and passes out through the second slot section 144c arranged on the middle ring fire cover 110.

[0100] Similarly, the first groove section 144b is arranged on the inner side of the middle ring fire cover 110, and the second groove section 144c is arranged on the outer peripheral wall of the middle ring fire cover 110. The first groove section 144b and the second groove section 144c are both annular structures, and the partition plate 144a is also arranged in the fire protection channel 140. The first groove section 144b is a through groove arranged in the middle ring fire cover 110, and the opening of the first groove section 144b away from the second groove section 144c is arranged around the first air inlet cavity 12a. The first groove section 144b is an annular structure that can make the gas in the first air inlet cavity 12a quickly enter the first groove section 144b, thereby ensuring the flow of the gas entering the protection channel.

[0101] A partition 144a is provided between the first slot section 144b and the second slot section 144c, and the first slot section 144b and the second slot section 144c are connected via a connecting hole 144d provided on the partition 144a. The connecting hole 144d can play a certain buffering and flow stabilizing role, thereby preventing the gas from flowing into the second slot section 144c too fast and being unable to diffuse in the annular second slot section 144c, or from being unable to fully mix with the air due to the too fast flow rate, resulting in incomplete combustion.

[0102] In some embodiments, there are multiple communicating holes 144d, and the multiple communicating holes 144d are arranged in a circle on the partition 144a. The shapes of the multiple communicating holes 144d can be circular, rectangular, trapezoidal, triangular, etc. The shapes of the multiple communicating holes 144d can be the same or different, and the opening areas of different communicating holes 144d can be the same or different.

[0103] The spacing distance between two adjacent communication holes 144d can be the same or different, and can be set according to the actual situation of the partition 144a. The number of communication holes 144d is not specifically limited, and can be set comprehensively according to the width of the partition 144a, the flow rate of the burner 10, etc.

[0104] In some embodiments, the cross-sectional area of ​​the connecting hole 144d is smaller than the cross-sectional areas of the first slot section 144b and the second slot section 144c in the axial direction of the middle ring fire cover 110. The smaller cross-sectional area of ​​the connecting hole 144d can play a certain role in stabilizing the flow of the gas in the process of entering the second slot section 144c from the first slot section 144b, and can decelerate the flow rate of the gas to a certain extent, so that the gas can diffuse in the second slot section 144c after entering the second slot section 144c.

[0105] In addition, the cross-sectional area of ​​the connecting hole 144d is smaller than the cross-sectional areas of the first groove section 144b and the second groove section 144c, which can also facilitate the opening of the connecting hole 144d on the partition 144a and reduce the difficulty of opening a hole on the partition 144a.

[0106] In some embodiments, the first slot section 144b and the second slot section 144c are arranged at an angle, which means that the opening directions of the first slot section 144b and the second slot section 144c are different, and the gas needs to change its flow direction after entering the second slot section 144c from the first slot section 144b, so as to slow down the flow speed, so that the gas can be fully mixed with the air as much as possible, thereby improving the combustion efficiency.

[0107] In some embodiments, the first slot section 144b is disposed below the second slot section 144c. The first slot section 144b is disposed substantially vertically, and the second slot section 144c is disposed substantially inclinedly. The first slot section 144b is disposed vertically, which can change the flow direction of the gas from the first air inlet cavity 12a into the first slot section 144b, increase the path for the gas flow, and enable the gas to be fully diffused in the first slot section 144b and the second slot section 144c.

[0108] As for the positions of the fire protection channel 140 and the middle ring fire hole 112 , there are a variety of setting methods. Regardless of the setting method, it is sufficient to ensure that the fire protection channel 140 is set below the middle ring fire hole 112 .

[0109] In some embodiments, the middle ring fire hole 112 is arranged on the first fire separation cover 113, and the fire protection channel 140 is arranged on the first fire separation cover 113. Since the fire protection channel 140 needs to be arranged below the middle ring fire hole 112, when the middle ring fire hole 112 is arranged on the first fire separation cover 113, the fire protection channel 140 can only be arranged on the first fire separation cover 113, and the space below the first fire separation cover 113 can be used to arrange the fire protection channel 140, so that the fire protection channel 140 and the middle ring fire hole 112 can be reasonably arranged on the first fire separation cover 113.

[0110] In some other embodiments, the central ring fire hole 112 is disposed on the second fire distribution cover 114 , and the fire protection channel 140 is disposed in the gap between the first fire distribution cover 113 , the second fire distribution cover 114 and the first fire distribution cover 113 or on the second fire distribution cover 114 .

[0111] If the middle ring fire hole 112 is set on the second fire dividing cover 114, the fire protection channel 140 can be set in three positions. It can be set on the second fire dividing cover 114, or on the gap between the first fire dividing cover 113 and the second fire dividing cover 114, or on the first fire dividing cover 113 alone, to ensure that the fire protection channel 140 is set below the middle ring fire hole 112.

[0112] The fire protection channel 140 is connected to the second air inlet cavity 12b, and a diversion groove can be provided on the gas distribution plate 12 to guide the gas in the second air inlet cavity 12b to the fire protection channel 140. A plurality of diversion grooves can be provided, and the plurality of diversion grooves can be arranged around the gas distribution plate 12.

[0113] In some embodiments, the burner 10 also includes a burner head 14, which has a first injection chamber 14a and a second injection chamber 14b that are independent of each other. The first injection chamber 14a is connected to the first air intake chamber 12a, and the second injection chamber 14b is connected to the second air intake chamber 12b. In order to facilitate the layout of the first injection chamber 14a and the second injection chamber 14b, the first injection chamber 14a can be set inside the second injection chamber 14b.

[0114] To sum up, in the burner 10 provided in the embodiment of the present application, the fire protection channel 140 is arranged on the middle ring fire cover 110, so that the gas in the first air inlet cavity 12a can flow into the fire protection channel 140 and diffuse on the periphery of the outer wall of the middle ring fire cover 110, so that the gas can gather around the thermocouple 13, and ensure as much as possible that the area around the thermocouple 13 of the burner 10 always remains in a burning state when the burner 10 is burning at a low fire, or the gas can quickly reignite after being blown out, thereby improving the stability of the burner 10 in the low fire burning state.

[0115] Based on the same inventive concept, an embodiment of the present application further provides a gas stove, which includes a main body and the above-mentioned burner 10, and the burner 10 is installed on the main body.

[0116] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0117] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0118] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A burner, characterized in that: include: An air distribution plate (12) having a first air inlet cavity (12a) and a second air inlet cavity (12b) which are independent of each other; A fire cover assembly (11), comprising a central fire cover (120) and a middle ring fire cover (110); the central fire cover (120) and the middle ring fire cover (110) are arranged at intervals, the central fire cover (120) is provided with the central fire hole (122) communicating with the first air inlet cavity (12a); the middle ring fire cover (110) is provided with the middle ring fire hole (112) communicating with the second air inlet cavity (12b); A thermocouple (13) is installed on the gas distribution plate (12) and is arranged between the middle ring fire cover (110) and the outer ring fire cover (130); The middle ring fire cover (110) is provided with a fire protection channel (140) in communication with the first air inlet cavity (12a), and the fire protection channel (140) is arranged close to the thermocouple (13).

2. The burner according to claim 1, characterized in that The fire protection channel (140) is arranged on a side of the middle ring fire hole (112) away from the gas distribution plate (12).

3. The burner according to claim 2, characterized in that: A connecting passage (115b) is provided between the middle ring fire cover (110) and the central fire cover (120), communicating with the first air inlet cavity (12a) and the fire protection passage (140).

4. The burner according to claim 3, characterized in that The middle ring fire cover (110) has a mounting cavity (115a) for mounting the central fire cover (120), and the connecting channel (115b) is arranged between the inner wall of the mounting cavity (115a) and the outer wall of the central fire cover (120).

5. The burner according to claim 4, characterized in that 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) covers the opening of the communication groove (115c) to form the connection channel (115b).

6. The burner according to claim 3, characterized in that The connecting channel (115b) and the fire protection channel (140) are arranged at an angle.

7. The burner according to claim 1, characterized in that The fire protection channel (140) is arranged on a side of the middle ring fire hole (112) close to the gas distribution plate (12).

8. The burner according to claim 7, characterized in that A partition (144a) is arranged in the fire protection channel (140) to divide the fire protection channel (140) into a first slot section (144b) and a second slot section (144c); a connecting hole (144d) connecting the first slot section (144b) and the second slot section (144c) is arranged on the partition (144a); the first slot section (144b) is connected to the first air inlet cavity (12a), and the second slot section (144c) is arranged close to the thermocouple (13).

9. The burner according to claim 8, characterized in that The first groove section (144b) and the second groove section (144c) are arranged at an angle.

10. The burner according to claim 8, characterized in that The first slot section (144b) is arranged below the second slot section (144c).

11. The burner according to any one of claims 1 to 10, characterized in that: The central fire cover (120) comprises a first fire distribution cover (113) and a second fire distribution cover (114); the first fire distribution cover (113) is installed on the gas distribution plate (12); the first fire distribution cover (113) is provided with a mounting cavity (115a); the central fire cover (120) is installed in the mounting cavity (115a); the second fire distribution cover (114) covers the opening of the mounting cavity (115a) and is connected to the first fire distribution cover (113); the central ring fire hole (112) is provided on the first fire distribution cover (113) or the second fire distribution cover (114).

12. The burner according to claim 11, characterized in that The gap between the first fire distribution cover (113) and the second fire distribution cover (114) forms a side of the fire protection channel (140) close to the thermocouple (13).

13. The burner according to claim 11, characterized in that The side of the fire protection channel (140) close to the thermocouple (13) is arranged on the second fire distribution cover (114).

14. The burner according to claim 11, characterized in that The fire protection channel (140) is arranged on the first fire distribution cover (113) at a side close to the thermocouple (13).

15. A gas stove, characterized in that: It comprises a burner (10) as claimed in any one of claims 1 to 14.

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