Burners and stoves

Abstract

The utility model provides a burner and a burner. The burner includes a base body and a gas mixing pipe, the gas mixing pipe is connected to the bottom of the base body, a first gas outlet pipe is arranged on the base body, the gas mixing pipe has an air inlet end and a gas outlet end, the gas outlet end is connected to the first gas outlet pipe, and an air inlet is arranged on the pipe wall between the air inlet end and the gas outlet end of the gas mixing pipe; a baffle is arranged in the gas mixing pipe, and the baffle is connected to the edge of the air inlet. The burner provided by the utility model can form a barrier to the refluxed gas due to the baffle arranged in the gas mixing pipe, thereby avoiding the potential safety hazard caused by the gas reflux in the burner head, and such a burner head is safer when in use. Moreover, for the burner head provided with the baffle, even if the length of the gas mixing pipe is short, the baffle can effectively prevent the gas in the burner head from refluxing from the gas mixing pipe, and the length of the gas mixing pipe can be shorter than that of the existing low-fire ejector pipe, thereby reducing the overall cost.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a stove head and a burner. Background Art

[0002] Gas stoves are common kitchen appliances in people's daily lives. Gas stoves usually include an air intake assembly, a burner, and a flame divider. The air intake assembly delivers gas to the small and large burners of the burner, and the flame divider can be connected to the small and large burners, so that the inner ring small fire and the outer ring large fire can be generated by the flame divider for users to cook.

[0003] Before the gas reaches the ignition distributor, it needs to be premixed with air to form a gas-air mixture for combustion. Existing gas stoves usually achieve premixing of gas and air in the ejector tube, wherein when the gas is transported to the ejector tube, the flow rate of the gas is relatively large, and the pressure difference can be used to drive the external air into the ejector tube from the air inlet of the ejector tube, so that the air and gas are mixed in the ejector tube. However, when the ejector tube is in use, there is a risk of gas-air mixture backflow. When the ignition distributor is blocked or backfire occurs, the gas-air mixture may flow back to the outside from the air inlet of the ejector tube, posing a safety hazard. Utility Model Content

[0004] In order to at least partially solve the problems existing in the prior art, according to one aspect of the utility model, a burner head is provided. The burner head includes a base body and a gas mixing pipe, the gas mixing pipe is connected to the bottom of the base body, a first gas outlet pipe is arranged on the base body, the gas mixing pipe has an inlet end and an outlet end, the outlet end is connected to the first gas outlet pipe, an air inlet is arranged on the pipe wall between the inlet end and the outlet end of the gas mixing pipe, and a baffle is arranged in the gas mixing pipe, and the baffle is connected to the edge of the air inlet.

[0005] The burner head provided by the utility model can block the refluxed gas due to the baffle plate arranged in the gas mixing pipe, thereby avoiding the potential safety hazard caused by the gas reflux in the burner head, and the burner head is safer when in use. Moreover, for the burner head provided with the baffle plate, even if the length of the gas mixing pipe is short, the baffle plate can effectively prevent the gas in the burner head from refluxing from the gas mixing pipe, and the length of the gas mixing pipe can be shorter than that of the existing low-fire ejector pipe, thereby reducing the overall cost.

[0006] For example, the inner diameter of the mixing pipe remains unchanged from the air inlet end to the air outlet end. Such a mixing pipe can be regarded as a straight pipe, and the airflow flowing in such a mixing pipe is equivalent to flowing in a straight pipe. Such a mixing pipe has a different structure from a conventional ejector pipe. Since there is no change in the inner diameter like a conventional ejector pipe, the cost of such a mixing pipe can be much lower than that of a conventional ejector pipe.

[0007] For example, in the axial direction of the gas mixing pipe, the air inlet has a first end close to the air inlet end and a second end away from the air inlet end, and the baffle is connected to the second end. When gas reflux occurs in the burner head, the refluxed gas usually flows from the vicinity of the second end toward the air inlet, and the baffle arranged in the second section can effectively block the refluxed gas in the burner head.

[0008] Exemplarily, on the cross section of the gas mixing pipe, the baffle has a first projection length T1, the air inlet has a second projection length T2, the inner wall of the gas mixing pipe has a circular cross section, the diameter of the circular cross section is the inner diameter S, and the first projection length T1, the second projection length T2 and the inner diameter S of the gas mixing pipe 130 satisfy: T1 is less than T2 and the ratio of T2 to S is not greater than 2 / 3. The first projection length T1 is less than the second projection length T2, which can prevent the baffle from blocking the external air from entering the gas mixing pipe, and can also prevent the baffle from interfering with the mixing of gas and air in the gas mixing pipe, and can ensure that the gas-air mixture can flow in the gas mixing pipe to the first outlet pipe. The ratio of the second projection length T2 to the inner diameter S of the gas mixing pipe is not greater than 2 / 3, which can prevent the air inlet from being an overly large opening on the pipe wall when the second projection length T2 is too large, and prevent the gas from entering the gas mixing pipe due to the excessively large air inlet and flowing directly to the outside of the burner through the air inlet, thereby avoiding the safety hazard caused by gas leakage.

[0009] Exemplarily, the baffle is constructed as a plate-shaped member extending away from the air inlet and toward the first air outlet. The baffle extending away from the air inlet and toward the first air outlet can effectively block the backflowing gas, thereby avoiding the safety hazard caused by the backflow of gas. The baffle structure in the form of a plate-shaped member is simpler and easier to implement, and the baffle in the form of a plate-shaped member has a better blocking effect on the backflowing gas, and the backflowing gas is not easy to flow around the side of the baffle.

[0010] For example, the angle F between the baffle and the tangent plane above the mixing pipe is 25° to 40°. Such a baffle has a good blocking effect on the backflow gas and will not affect the normal flow of the gas-air mixture flowing from the mixing pipe to the first outlet pipe.

[0011] Exemplarily, the burner head includes an ejector pipe, which is connected to the gas mixing pipe side by side below the base body, and a second gas outlet pipe is provided on the base body, the ejector pipe is connected to the second gas outlet pipe, wherein the length of the ejector pipe is greater than the length of the gas mixing pipe. Even if the length of the gas mixing pipe is less than the length of the existing ejector pipe, the gas-air mixture generated by such a gas mixing pipe can also meet the needs of low-fire combustion. Therefore, such a burner head does not need to be provided with a low-fire ejector pipe, and the gas mixing pipe is shorter than the existing low-fire ejector pipe, which is not only convenient for molding and manufacturing, but also can reduce the overall cost.

[0012] Exemplarily, the length of the gas mixing tube is N, the length of the ejector tube is M, and the ratio of N to M is not greater than 1 / 2. When the ratio of the length of the gas mixing tube N to the length of the ejector tube M is not greater than 1 / 2, the gas-air mixed gas formed by the gas mixing tube can also meet the needs of low-fire combustion, and in such a burner, the overall cost can be further reduced.

[0013] For example, the first gas outlet pipe, the second gas outlet pipe, the ejector pipe, the gas mixing pipe and the base are an integrated structure. Such a burner head has a stronger integrity, and because it is an integrated structure, the stability and strength of the overall structure can be better; because the gas mixing pipe can have a shorter length, when the second gas outlet pipe, the first gas outlet pipe, the ejector pipe, the gas mixing pipe and the base are an integrated structure, the overall structure can occupy a smaller space and the overall cost can also be lower.

[0014] According to another aspect of the utility model, a burner is provided, which includes an air intake assembly, a flame distributor, and any burner as described above, wherein the air intake assembly is connected to the air intake end through the jet assembly, and the first air outlet pipe is connected to the flame distributor.

[0015] Exemplarily, the jet assembly has a nozzle opening, which is arranged near the air inlet. The nozzle opening is close to the air inlet, so that the airflow ejected from the jet assembly can still have a relatively high airflow velocity when it flows near the air inlet.

[0016] For example, the jet assembly includes a jet part, the jet part is threadedly connected to the air inlet end, and the nozzle opening is formed on the jet part. By designing the threaded connection position between the jet part and the air inlet end, the jet assembly can be connected to a suitable position on the air inlet end of the mixing pipe, and the nozzle opening can be located at a suitable position accordingly, so that the gas flowing out of the nozzle opening can drive the external air into the mixing pipe with a stronger ability.

[0017] A series of simplified concepts are introduced in the utility model content, which will be further described in detail in the detailed implementation section. The utility model content section does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0018] The advantages and features of the present invention are described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following drawings of the present invention are used as part of the present invention for understanding the present invention. The drawings show the implementation of the present invention and its description, and are used to explain the principle of the present invention. In the drawings,

[0020] Figure 1It is a perspective view of a burner according to an exemplary embodiment of the present utility model, wherein the flame distributor is hidden;

[0021] Figure 2 for Figure 1 A top view of the burner is shown;

[0022] Figure 3 is a cross-sectional view of a burner according to an exemplary embodiment of the present utility model;

[0023] Figure 4 is a perspective view of a burner according to an exemplary embodiment of the present invention;

[0024] Figure 5 for Figure 4 A cross-sectional view of the burner shown in one section plane; and

[0025] Figure 6 for Figure 4 The burner is shown in cross-section in another section plane.

[0026] The above drawings include the following reference numerals:

[0027] 100, stove head; 110, seat body; 111, first air outlet pipe; 112, second air outlet pipe; 113, soup plate mounting hole; 114, ignition needle mounting hole; 115, thermocouple mounting hole; 120, ejector tube; 130, gas mixing tube; 131, air inlet end; 1311, air inlet port; 132, tube wall; 133, air inlet; 1331, first end; 1332, second end; 134, air outlet end; 140, baffle; 200, air inlet assembly; 210, high fire channel; 300, jet assembly; 310, jet component; 320, nozzle port; 330, connecting pipe. DETAILED DESCRIPTION

[0028] In the following description, a large number of details are provided so that the present invention can be thoroughly understood. However, it will be appreciated by those skilled in the art that the following description only illustrates preferred embodiments of the present invention, and the present invention can be implemented without one or more of such details. In addition, in order to avoid confusion with the present invention, some technical features known in the art are not described in detail.

[0029] According to one aspect of the utility model, a burner is provided. The burner can be applied to any suitable device, including but not limited to a burner. Therefore, according to another aspect of the utility model, a burner is provided. Figure 1 , Figure 2 and Figure 3The burner may include an air intake assembly 200, an air injection assembly 300, an ignition distributor (not shown in the figure) and any burner head 100 to be introduced below.

[0030] See also Figure 4 , Figure 5 and Figure 6 , the burner head 100 may include a base body 110 and a gas mixing tube 130. The base body 110 may provide support for the ignition distributor, and the ignition distributor may be connected to the top of the base body 110. The base body 110 may be provided with a soup plate mounting hole 113, an ignition needle mounting hole 114, and a thermocouple mounting hole 115. The ignition needle may be mounted to the ignition needle mounting hole 114 by threaded connection or any other suitable form. Similarly, the thermocouple may be mounted to the thermocouple mounting hole 115 by threaded connection or any other suitable form. After the ignition needle and the thermocouple are installed, the soup plate may be mounted to the soup plate mounting hole 113 by threaded connection with fasteners or any other suitable form. The gas mixing tube 130 may be connected to the bottom of the base body 110. When the burner head 100 is installed, the bottom of the base body 110 may be the bottom in the direction of gravity.

[0031] The seat body 110 may be provided with a first gas outlet pipe 111, and the gas mixing pipe 130 may have an inlet end 131 and an outlet end 134, and the outlet end 134 may be connected to the first gas outlet pipe 111. The inlet end 131 may be provided with an opening for external gas to enter, for example, the inlet end 131 may be provided with an inlet port 1311, and external gas may enter the gas mixing pipe 130 through the inlet port 1311. The airflow entering the gas mixing pipe 130 from the inlet end 131 may enter the first gas outlet pipe 111 through the outlet end 134.

[0032] The mixing pipe 130 may be provided with an air inlet 133 on the pipe wall 132 between the air inlet end 131 and the air outlet end 134. Exemplarily, the air inlet end 131 may be connected to the jet assembly 300, and the jet assembly 300 may have a nozzle opening 320, and the nozzle opening 320 may be arranged near the air inlet 133. The jet assembly 300 may be connected to the air inlet end 131 by threaded connection, interference fit or any other suitable form. The jet assembly 300 may include a jet component 310 and a nozzle opening 320, and the nozzle opening 320 may be connected to the jet component 310 by welding, clamping or threaded connection after being processed separately, or the nozzle opening 320 may be formed by integrated processing with the jet component 310. The jet component 310 may be connected to the air inlet end 131 so that the jet assembly 300 is connected to the air inlet end 131. An air inlet 1311 may be provided on the air inlet end 131, and the jet assembly 300 may be connected to the air inlet 1311 and inserted into the mixing pipe 130 through the air inlet 1311. At least part of the jet assembly 300 may be located in the mixing pipe 130, for example, the jet assembly 300 may include a nozzle opening 320, and the nozzle opening 320 may be located in the mixing pipe 130. The airflow flowing into the mixing pipe 130 through the jet assembly 300 may first pass through the jet component 310 and then reach the nozzle opening 320, and flow into the mixing pipe 130 from the nozzle opening 320. The airflow ejected from the nozzle opening 320 has a relatively high velocity, and after the airflow flows into the mixing pipe 130, the velocity of the airflow will gradually decrease. The nozzle opening 320 is close to the air inlet 133, so that the airflow ejected from the jet assembly 300 still has a relatively high velocity when it flows near the air inlet 133.

[0033] Exemplarily, the jet component 310 may be threadedly connected to the air inlet end 131. The air inlet end 131 may be provided with an air inlet port 1311, an inner wall of the air inlet port 1311 may be provided with an internal thread, and an outer wall of the jet component 310 on the jet assembly 300 may be provided with an external thread, and the threaded connection between the jet component 310 and the air inlet end 131 is achieved through the threaded cooperation of the internal thread and the external thread, thereby achieving the threaded connection between the jet component 310 and the air mixing pipe 130. By designing the position of the air inlet port 1311 on the air inlet end 131, when the jet component 310 is threadedly connected to the air inlet end 131, the jet component 310 may be located at a suitable position relative to the air mixing pipe 130, for example, the central axis of the jet component 310 may be non-coaxial with the central axis of the air mixing pipe 130. Therefore, by designing the threaded connection position between the jet component 310 and the air inlet end 131, the jet assembly 300 can be connected to a suitable position on the air inlet end 131 of the mixing pipe 130, and the nozzle port 320 can also be located at a suitable position accordingly, so that the gas flowing out of the nozzle port 320 can drive the external air into the mixing pipe 130 with a stronger ability.

[0034] The air intake assembly 200 can be connected to the jet assembly 300, and connected to the air intake end 131 through the jet assembly 300. The air intake assembly 200 can be connected to an end of the jet assembly 300 away from the mixing pipe 130. When the jet assembly 300 includes a jet component 310 and a nozzle port 320, the jet component 310 can be inserted into the air intake end 131, for example, the jet component 310 can be inserted into the air intake port 1311, so that the nozzle port 320 can be located in the mixing pipe 130. At this time, the end of the jet assembly 300 away from the mixing pipe 130 is the end away from the nozzle port 320. The jet assembly 300 may include a connecting pipe 330, the jet component 310 may be arranged at one end of the connecting pipe 330, the nozzle port 320 may be arranged on the jet component 310, and the other end of the connecting pipe 330 may be connected to the air intake assembly 200. When one end of the connecting pipe 330 is connected to the air intake assembly 200, it may be directly connected to the air intake valve body of the air intake assembly 200. The connecting pipe 330 can be any suitable form such as a hose. The gas delivered by the air intake assembly 200 can enter the gas mixing pipe 130 through the injection assembly 300. The gas has a high flow rate when entering the gas mixing pipe 130 from the injection assembly 300, so that a pressure difference can be formed with the external air. The air inlet 133 can be an opening of any form on the pipe wall 132. Under the action of the pressure difference, the flowing gas will drive the external air to enter the gas mixing pipe 130 from the air inlet 133, so that the gas and air can be mixed to form a gas-air mixed gas to support combustion.

[0035] The first gas outlet pipe 111 can be connected to the ignition distributor. After the gas inlet assembly 200 delivers the gas to the burner 100, the gas can be mixed with the air through the gas mixing pipe 130 to form a gas-air mixed gas. The gas-air mixed gas formed through the gas mixing pipe 130 can flow from the first gas outlet pipe 111 to the ignition distributor, and can burn at the ignition distributor to generate flames.

[0036] See also Figure 3 , Figure 4 and Figure 5, a baffle 140 may be provided in the gas mixing pipe 130, and the baffle 140 may be connected to the edge of the air inlet 133. The baffle 140 may be in the shape of a plate or any other form. When gas reflux occurs in the burner 100, for example, the gas-air mixed gas in the first gas outlet pipe 111 refluxes, the gas-air mixed gas will be blocked by the baffle 140, so the refluxed gas-air mixed gas will not be able to flow back to the outside of the burner 100 through the air inlet 133, thereby avoiding the risk of gas reflux and potential safety hazards. After the gas enters the gas mixing pipe 130 from the jet assembly 300 and drives the external air to enter the gas mixing pipe 130 from the air inlet 133, a gas-air mixed gas may be formed in the gas mixing pipe 130, and the gas-air mixed gas may flow into the first gas outlet pipe 111 under the guidance of the baffle 140. That is to say, the baffle 140 has two functions. The first function is to block the backflow of the gas-air mixture in the first gas outlet pipe 111 , and the second function is to guide the gas-air mixture in the mixing pipe 130 into the first gas outlet pipe 111 .

[0037] The burner head 100 provided by the utility model can block the refluxed gas due to the baffle 140 disposed in the gas mixing pipe 130, thereby avoiding the potential safety hazard caused by the gas reflux in the burner head 100, and the burner head 100 is safer when in use. Moreover, the burner head 100 provided with the baffle 140 can effectively prevent the gas in the burner head 100 from refluxing from the gas mixing pipe 130 even if the length of the gas mixing pipe 130 is short, and the length of the gas mixing pipe 130 can be shorter than that of the existing low-fire ejector pipe 120, thereby reducing the overall cost.

[0038] In one embodiment of the utility model, the inner diameter of the mixing tube 130 may remain unchanged from the air inlet end 131 of the mixing tube 130 to the air outlet end 134 of the mixing tube 130. Such a mixing tube 130 may be regarded as a straight tube, and the airflow flowing in such a mixing tube 130 is equivalent to flowing in a straight tube. Such a mixing tube 130 has a different structure from a conventional ejector tube. Since there is no change in the inner diameter similar to a conventional ejector tube, the cost of such a mixing tube 130 may be much lower than that of a conventional ejector tube.

[0039] In one embodiment of the utility model, in the axial direction of the gas mixing pipe 130 (direction XX in the figure), the air inlet 133 has a first end 1331 close to the gas inlet end 131 and a second end 1332 away from the gas inlet end 131, and the baffle 140 is connected to the second end 1332. When gas reflux occurs in the burner head 100, the refluxed gas usually flows from the vicinity of the second end 1332 toward the air inlet 133, and the baffle 140 disposed at the second end 1332 can effectively block the refluxed gas in the burner head 100.

[0040] In one embodiment of the present invention, see Figure 3 , Figure 5 and Figure 6 In the cross section of the mixing pipe 130, the baffle 140 may have a first projection length T1, the air inlet 133 may have a second projection length T2, the inner wall of the mixing pipe 130 may have a circular cross section, and the diameter of the circular cross section may be the inner diameter S. The first projection length T1, the second projection length T2, and the inner diameter S of the mixing pipe 130 may satisfy: T1 is less than T2 and the ratio of T2 to S is not greater than 2 / 3. Figure 3 , Figure 5 and Figure 6 As shown, the cross section of the mixing pipe 130 can be any plane perpendicular to the central axis of the mixing pipe 130. When the gas enters the mixing pipe 130, it will drive the external air to enter the mixing pipe 130 from the air inlet 133, and form a gas-air mixed gas in the mixing pipe 130. The first projection length T1 is smaller than the second projection length T2, which can prevent the baffle 140 from blocking the external air from entering the mixing pipe 130, and can also prevent the baffle 140 from interfering with the mixing of gas and air in the mixing pipe 130, and can ensure that the gas-air mixed gas can flow in the mixing pipe 130 to the first outlet pipe 111. The ratio of the second projected length T2 to the inner diameter S of the gas mixing pipe 130 is not greater than 2 / 3, so that when the second projected length T2 is too large, the air inlet 133 is not too large an opening on the pipe wall 132, and the gas entering the gas mixing pipe 130 due to the excessive size of the air inlet 133 is not directly flowed to the outside of the burner 100 through the air inlet 133, thereby avoiding the safety hazard caused by gas leakage.

[0041] In one embodiment of the present invention, see Figure 3 and Figure 5 , the baffle 140 can be constructed as a plate-shaped member extending in a direction away from the air inlet 133 and toward the first outlet pipe 111. When gas reflux occurs in the burner 100, the gas-air mixture in the first outlet pipe 111 can usually reflux toward the mixing pipe 130, and after reaching the mixing pipe 130, it refluxes to the outside of the burner 100 from the air inlet 133. The baffle 140 extending in a direction away from the air inlet 133 and toward the first outlet pipe 111 can effectively block the refluxed gas, thereby avoiding the safety hazards caused by gas reflux. The baffle 140 in the form of a plate-shaped member has a simpler structure and is easier to implement. In addition, the baffle 140 in the form of a plate-shaped member has a better blocking effect on the refluxed gas, and the refluxed gas is not easy to flow around the side of the baffle 140.

[0042] For example, see Figure 3 , Figure 4 and Figure 5, the length of the baffle 140 in the extension direction (the length L shown in the figure) can be 5 to 9 mm, for example, the length L of the baffle 140 can be 5 mm, 6 mm, 6.8 mm, 7.4 mm or 9 mm. Preferably, the length L of the baffle 140 can be 8 mm. When the length L of the baffle 140 in the extension direction is too long, it may affect the normal flow of the gas-air mixture, for example, it may block the gas-air mixture flowing from the mixing pipe 130 toward the first outlet pipe 111; when the length L of the baffle 140 in the extension direction is too short, the blocking effect on the backflow gas may be too poor or even unable to block the backflow gas. When the length L of the baffle 140 in the extension direction is 5 to 9 mm, the baffle 140 has a good blocking effect on the backflow gas and will not affect the normal flow of the gas-air mixture flowing from the mixing pipe 130 to the first outlet pipe 111.

[0043] For example, see Figure 3 , Figure 4 and Figure 5 , the angle (illustrated angle F) between the baffle 140 and the tangent plane above the mixing pipe 130 can be 25° to 40°, for example, the angle F can be 25°, 28°, 31°, 37° or 40°. Preferably, the angle F can be 35°. When the angle F between the baffle 140 and the tangent plane above the mixing pipe 130 is too large, the first projection length T1 of the baffle 140 on the cross section of the mixing pipe 130 is too large, and such a baffle 140 will interfere with the normal flow of the gas-air mixture flowing from the mixing pipe 130 to the first outlet pipe 111; when the angle F between the baffle 140 and the tangent plane above the mixing pipe 130 is too small, the first projection length T1 of the baffle 140 on the cross section of the mixing pipe 130 is too small, and such a baffle 140 has little blocking effect on the backflow gas. The angle F between the baffle 140 and the tangent plane above the mixing pipe 130 is 25° to 40°. Such a baffle 140 has a good blocking effect on the backflow gas and will not affect the normal flow of the gas-air mixture flowing in the mixing pipe 130 to the first outlet pipe 111.

[0044] In one embodiment of the present invention, see Figure 1 and Figure 2The burner head 100 may include an ejector tube 120, and the ejector tube 120 and the gas mixing tube 130 may be connected side by side below the base 110. The axis of the ejector tube 120 and the axis of the gas mixing tube 130 may be coplanar or non-coplanar, and the axes of the two may be parallel to each other or may be at a certain angle to each other. The bottom of the base 110 means that when the burner head 100 is installed, the ejector tube 120 and the gas mixing tube 130 are connected to the bottom of the base 110, and when the burner head 100 is installed, the bottom of the base 110 may be the bottom in the direction of gravity. The ejector tube 120 may be similar to a conventional ejector tube, or may be designed into any suitable form as required, and the gas entering the ejector tube 120 may also be mixed with air to form a gas-air mixed gas to support combustion. A second gas outlet pipe 112 may be provided on the base 110, and the second gas outlet pipe 112 may be connected to the ignition distributor. The fuel gas-air mixture formed through the ejector pipe 120 can flow to the ignition distributor through the second gas outlet pipe 112 .

[0045] See also Figure 2 , the length of the ejector tube 120 (length M shown in the figure) can be greater than the length of the mixing tube 130 (length N shown in the figure). Since the power of the inner ring small fire is relatively small, the amount of gas and air required to burn the inner ring small fire are relatively small. The length N of the mixing tube 130 can be relatively small, and a gas-air mixture sufficient to meet the combustion requirements of the inner ring small fire can still be formed through the smaller length of the mixing tube 130. The length M of the ejector tube 120 can be greater than the length N of the mixing tube 130, that is, the length N of the mixing tube 130 can be less than the length of a conventional ejector tube. Exemplarily, the form of the mixing tube 130 can be different from that of a conventional ejector tube. For example, the mixing tube 130 can be in the form of a cylindrical straight tube, and only an air inlet 133 is required to be provided on the tube wall 132.

[0046] The first gas outlet pipe 111 can be connected to the inner ring fire cover of the ignition distributor, and the second gas outlet pipe 112 can be connected to the outer ring fire cover of the ignition distributor. The end of the ejector pipe 120 away from the base body 110 can be connected to the air intake assembly 200. The air intake assembly 200 can be provided with a large fire channel 210, and the end of the ejector pipe 120 away from the base body 110 can be connected to the large fire channel 210. After the external gas enters the air intake assembly 200, it can be transported to the ejector pipe 120 through the large fire channel 210. After the gas enters the ejector pipe 120, a gas-air mixture can be formed in the ejector pipe 120. The gas-air mixture can flow from the second outlet pipe 112 to the outer ring fire cover of the ignition distributor, and can burn at the outer ring fire cover to produce an outer ring large fire; the gas entering the air intake assembly 200 can also be transported to the injection assembly 300 through the connecting pipe 330, and sprayed into the mixing pipe 130 through the nozzle port 320. The gas entering the mixing pipe 130 will drive the external air to enter the mixing pipe 130 through the air inlet 133, thereby forming a gas-air mixture in the mixing pipe 130. The formed gas-air mixture can flow from the first outlet pipe 111 to the inner ring fire cover of the ignition distributor, and can burn at the inner ring fire cover to produce an inner ring small fire. Since the amount of gas and air required for small fire combustion is relatively small, even if the length of the mixing pipe 130 is less than that of the existing ejector pipe, the gas-air mixture generated by such a mixing pipe 130 can also meet the needs of small fire combustion. Therefore, such a burner head 100 does not need to be provided with a low-fire ejector tube, and the gas mixing tube is shorter than the existing low-fire ejector tube, which is not only convenient for molding and manufacturing, but also can reduce the overall cost.

[0047] In one embodiment of the present invention, see Figure 2 , the ratio of the length of the gas mixing tube 130 (length N shown in the figure) to the length of the ejector tube 120 (length M shown in the figure) may be no greater than 1 / 2. The length of a conventional ejector tube is usually 60 to 80 mm, for example, the length of a conventional ejector tube may be 60 mm, 64 mm, 70 mm, 77 mm or 80 mm. In the burner head 100 provided by the utility model, the length N of the gas mixing tube 130 may be 20 to 30 mm, for example, the length N of the gas mixing tube 130 may be 20 mm, 23 mm, 24 mm or 30 mm. When the ratio of the length N of the gas mixing tube 130 to the length M of the ejector tube 120 is no greater than 1 / 2, the gas-air mixed gas formed by the gas mixing tube 130 can also meet the requirements of low-fire combustion, and even if the length N of the gas mixing tube 130 is short, due to the provision of the baffle 140, there is no need to worry about the gas flowing back from the air inlet 133 to the outside of the burner head 100. In such a burner head 100, the overall cost can be further reduced.

[0048] In one embodiment of the utility model, the first gas outlet pipe 111, the second gas outlet pipe 112, the ejector pipe 120, the gas mixing pipe 130 and the base body 110 can be an integrated structure. Such a burner head 100 has a stronger integrity, and because it is an integrated structure, the stability and strength of the overall structure can be better, and the overall sealing can also be better.

[0049] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front", "back", "up", "down", "left", "right", "lateral", "vertical", "vertical", "horizontal", "top", "bottom", etc. are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the contours of each component itself.

[0050] For ease of description, regional relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the regional positional relationship between one or more components or features shown in the figure and other components or features. It should be understood that regional relative terms include not only the orientation of the components as described in the figure, but also different orientations in use or operation. For example, if the components in the accompanying drawings are inverted as a whole, the components "above other components or features" or "above other components or features" will include the situation where the components are "below other components or structures" or "below other components or structures". Therefore, the exemplary term "above" may include both "above" and "below". In addition, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this article is intended to include all of these situations.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, parts, components and / or combinations thereof.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0053] The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, it can be understood by those skilled in the art that the utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the utility model, and these variations and modifications all fall within the scope of protection claimed by the utility model. The protection scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A burner head, characterized in that: The invention comprises a seat body and a mixing pipe, wherein the mixing pipe is connected to the bottom of the seat body, a first air outlet pipe is arranged on the seat body, the mixing pipe has an air inlet end and an air outlet end, the air outlet end is connected to the first air outlet pipe, and an air inlet is arranged on the pipe wall between the air inlet end and the air outlet end; A baffle is arranged in the mixing pipe, and the baffle is connected to the edge of the air inlet.

2. The burner head according to claim 1, characterized in that: From the air inlet end to the air outlet end, the inner diameter of the mixing pipe remains unchanged.

3. The burner head according to claim 1, characterized in that: In the axial direction of the mixing pipe, the air inlet has a first end close to the air intake end and a second end away from the air intake end, and the baffle is connected to the second end.

4. The burner head according to claim 1, characterized in that: On the cross section of the mixing pipe, the baffle has a first projection length T1, the air inlet has a second projection length T2, the inner wall of the mixing pipe has a circular cross section, the diameter of the circular cross section is the inner diameter S, and the first projection length T1, the second projection length T2 and the inner diameter S of the mixing pipe satisfy: T1 is less than T2 and the ratio of T2 to S is not greater than 2 / 3.

5. The burner head according to claim 1, characterized in that: The blocking piece is configured as a plate-shaped member extending away from the air inlet and toward a direction close to the first air outlet pipe.

6. The burner head according to claim 5, characterized in that: The included angle F between the baffle and the tangent plane above the gas mixing pipe is 25° to 40°.

7. The burner head according to any one of claims 1 to 6, characterized in that: The furnace head includes an ejector pipe, which is connected side by side with the gas mixing pipe below the base body. A second gas outlet pipe is provided on the base body, and the ejector pipe is communicated with the second gas outlet pipe, wherein the length of the ejector pipe is greater than that of the gas mixing pipe.

8. The burner head according to claim 7, characterized in that: The length of the mixing tube is N, the length of the ejector tube is M, and the ratio of N to M is not greater than 1 / 2.

9. The burner head according to claim 7, characterized in that: The first air outlet pipe, the second air outlet pipe, the ejector pipe, the gas mixing pipe and the seat body are an integrated structure.

10. A burner, characterized in that: It comprises an air intake assembly, an air jet assembly, an ignition distributor and a burner as described in any one of claims 1 to 9, wherein the air intake assembly is connected to the air intake end through the air jet assembly, and the first air outlet pipe is connected to the ignition distributor.

11. The burner according to claim 10, characterized in that The jet assembly has a nozzle opening, and the nozzle opening is arranged close to the air inlet.

12. The burner according to claim 11, characterized in that The jet assembly includes a jet component, the jet component is threadedly connected to the air inlet end, and the nozzle opening is formed on the jet component.

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