Burners and stoves

Abstract

The utility model provides a burner and a burner. The burner includes a base and a gas mixing pipe, the gas mixing pipe is connected to the bottom of the base, a first gas outlet pipe is arranged on the base, the gas mixing pipe has an air inlet end and an air outlet end, the air outlet end is connected to the first gas outlet pipe; an air inlet is arranged on the pipe wall between the air inlet end and the air outlet end of the gas mixing pipe, the air inlet end is connected to a jet assembly, the jet assembly has a nozzle opening, and the nozzle opening is arranged close to the air inlet. The burner provided by the utility model can achieve mixing of gas and air in the gas mixing pipe. In such a burner, a gas mixing pipe is used to replace a conventional ejector pipe, and such a gas mixing pipe only needs to be provided with an air inlet on the pipe wall between the air inlet end and the air outlet end. Compared with the existing ejector pipe, the gas mixing pipe has a simpler structure, which is not only convenient for molding and manufacturing, but also can reduce 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 reaching the ignition distributor, the gas needs to be premixed with air to form a gas-air mixture for combustion. In existing gas stoves, the burner head usually includes a low-fire ejector tube and a high-fire ejector tube, and the low-fire ejector tube and the high-fire ejector tube are basically the same length. The gas delivered to the burner head by the air intake assembly will enter the low-fire ejector tube and the high-fire ejector tube, and the air pressure difference will be used to attract air into the low-fire ejector tube and the high-fire ejector tube, thereby achieving premixing of gas and air in the low-fire ejector tube and the high-fire ejector tube. However, the manufacturing process of the ejector tube is complicated, and the overall cost of such a gas stove is relatively high. 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, the inlet end is connected to an injection assembly, the injection assembly has a nozzle opening, and the nozzle opening is arranged close to the air inlet.

[0005] In the burner head provided by the utility model, after the gas enters the gas mixing pipe from the jet assembly, the gas flow rate flowing out of the jet assembly is relatively large, and the pressure difference can be used to attract external air into the gas mixing pipe at the air inlet, so that the gas and air can be mixed in the gas mixing pipe. In such a burner head, the conventional ejector pipe is replaced by the gas mixing pipe, and such a gas mixing pipe only needs to be provided with an air inlet on the pipe wall between the air inlet end and the air outlet end. Compared with the existing ejector pipe, the gas mixing pipe has a simpler structure, which is not only convenient for molding and manufacturing, but also can reduce 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] Exemplarily, the nozzle opening is located in the 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 nozzle opening is located between the first end and the air inlet end in the axial direction of the mixing pipe. When the nozzle opening is located between the first end and the air inlet end in the axial direction, the nozzle opening will not block the external air from entering the mixing pipe from the air inlet. When the gas enters the mixing pipe, more external air can be driven to enter the mixing pipe from the air inlet, which can ensure that the amount of air required to form the gas-air mixed gas is sufficient, so that the effect of forming the gas-air mixed gas through the mixing pipe can be better.

[0008] Exemplarily, the axial spacing A between the nozzle opening and the first end is not greater than 2 mm. The axial spacing A between the nozzle opening and the first end in the axial direction is not greater than 2 mm, which can ensure that the gas entering the gas mixing pipe can drive the external air to enter the gas mixing pipe from the air inlet, thereby ensuring that a gas-air mixed gas can be formed through the gas mixing pipe. The gas flow rate flowing in the gas mixing pipe to the vicinity of the air inlet is relatively large, which can also make the effect of forming a gas-air mixed gas better.

[0009] Exemplarily, the nozzle opening is located in the 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 nozzle opening is located between the first end and the second end in the axial direction of the mixing pipe. In the axial direction, when the nozzle opening is located between the first end and the second end, the gas flowing out of the nozzle opening can flow near the air inlet at a relatively high flow rate, so that the ability to drive the external air from the air inlet into the mixing pipe through the air pressure difference is stronger, and more external air can be driven into the mixing pipe, so that the effect of forming a gas-air mixed gas in the mixing pipe is better.

[0010] Exemplarily, the axial spacing B between the nozzle opening and the first end is not greater than 2 mm. When the axial spacing B between the nozzle opening and the first end in the axial direction is not greater than 2 mm, the gas flowing out of the nozzle opening can flow near the air inlet at a relatively high flow rate, that is, the ability to drive the external air into the mixing pipe from the air inlet through the air pressure difference is relatively strong, so that the jet component has less obstruction to the external air entering the mixing pipe.

[0011] Exemplarily, the nozzle opening is located in the 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 nozzle opening is aligned with the first end in the axial direction of the mixing pipe. The nozzle opening is aligned with the first end in the axial direction, the nozzle opening will not block the external air from entering the mixing pipe from the air inlet, and the gas flowing out of the nozzle opening can flow near the air inlet at a higher flow rate, so that the ability to drive the external air from the air inlet into the mixing pipe through the air pressure difference is stronger, and more external air can be driven into the mixing pipe, and the effect of forming a gas-air mixed gas in the mixing pipe is better.

[0012] Exemplarily, the length of the air inlet in the axial direction of the gas mixing pipe is 8 to 12 mm. When the length of the air inlet in the axial direction is 8 to 12 mm, the air inlet is equivalent to a sufficiently large opening on the wall of the gas mixing pipe, and the external air can enter the gas mixing pipe through such an air inlet, and the amount of air entering the gas mixing pipe can meet the air volume required for forming the outer ring small fire combustion; the gas in the gas mixing pipe is not easy to flow out from such an air inlet, thereby avoiding the safety hazard of the gas-air mixed gas flowing out of the air inlet to the outside of the burner.

[0013] For example, on a plane perpendicular to the central axis of the mixing pipe, the air inlet is an arc-shaped notch. Such an air inlet is easy to process, and the wall of the mixing pipe is provided with such an air inlet, so the overall structure can be simpler and easier to implement.

[0014] For example, the line between the two ends of the circular arc notch is used as the cutting line, the vertical distance from the vertex of the circular arc notch to the cutting line is D, the cross-sectional radius of the mixing pipe is R, and the vertical distance D satisfies 0.4R≤D≤0.6R. The vertical distance D satisfies 0.4R≤D≤0.6R, and the air inlet is equivalent to a sufficiently large opening on the wall of the mixing pipe. External air can enter the mixing pipe through such an air inlet, and the amount of air entering the mixing pipe can meet the air volume required for forming the outer ring small fire combustion; the gas in the mixing pipe is not easy to flow out from such an air inlet, thereby avoiding the safety hazard of the gas-air mixed gas flowing out of the air inlet to the outside of the burner.

[0015] For example, the nozzle opening is located in the gas mixing pipe, and on a plane perpendicular to the central axis of the gas mixing pipe, the projection of the nozzle opening and the vertex of the arc-shaped notch are located on both sides of the central axis of the gas mixing pipe. By making the nozzle opening relatively far away from the air inlet, it is possible to prevent the gas flowing out of the nozzle opening and the gas in the gas mixing pipe from flowing out of the air inlet to the outside of the gas mixing pipe, thereby avoiding the potential safety hazard of the gas-air mixed gas flowing out of the air inlet to the outside of the burner.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] Exemplarily, 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. The nozzle opening can be formed on the jet part, and the nozzle opening can also 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.

[0020] According to another aspect of the utility model, a burner is provided. The burner comprises an air intake assembly, a flame distributor and any burner as described above. The air intake assembly is connected to an end of the jet assembly away from the gas mixing pipe, and the first gas outlet pipe is connected to the flame distributor.

[0021] 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.

[0022] The advantages and features of the present invention are described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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,

[0024] Figure 1 It is a perspective view of a burner according to an exemplary embodiment of the present utility model, wherein the flame distributor is hidden;

[0025] Figure 2 for Figure 1 A top view of the burner is shown;

[0026] Figure 3 is a cross-sectional view of a burner according to an exemplary embodiment of the present utility model;

[0027] Figure 4 is a cross-sectional view of a burner according to an exemplary embodiment of the present utility model;

[0028] Figure 5 is a three-dimensional diagram of a burner according to an exemplary embodiment of the present invention;

[0029] Figure 6 for Figure 5 A cross-sectional view of the burner shown in one section plane; and

[0030] Figure 7 for Figure 5 The burner is shown in cross-section in another section plane.

[0031] The above drawings include the following reference numerals:

[0032] 100, stove head; 110, base; 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; 200, air inlet assembly; 210, high fire channel; 300, jet assembly; 310, jet component; 320, nozzle port; 330, connecting pipe. DETAILED DESCRIPTION

[0033] 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.

[0034] 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 , Figure 3 and Figure 4 The burner may include an air intake assembly 200, an ignition distributor (not shown) and any burner head 100 to be described below.

[0035] See also Figure 5 , Figure 6 and Figure 7 , the stove head 100 may include a base body 110 and a gas mixing pipe 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 also 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 of fasteners or any other suitable form.

[0036] The gas mixing pipe 130 may be connected to the bottom of the base body 110. When the furnace head 100 is installed, the bottom of the base body 110 may be the bottom in the gravity direction.

[0037] The seat body 110 may be provided with a first air outlet pipe 111, and the air mixing pipe 130 may have an air inlet end 131 and an air outlet end 134, and the air outlet end 134 may be connected to the first air outlet pipe 111. The airflow entering the air mixing pipe 130 from the air inlet end 131 may enter the first air outlet pipe 111 through the air outlet end 134.

[0038] 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. The air inlet end 131 may be connected to the jet assembly 300. The jet assembly 300 may have a nozzle opening 320. The nozzle opening 320 may be provided 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. The nozzle opening 320 may be separately processed from the jet component 310 and connected together by various forms such as welding, clamping or threaded connection. The nozzle opening 320 may also 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.

[0039] 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.

[0040] 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.

[0041] In the existing burners, the burner head is usually provided with an ejector tube. In the burner head 100 provided by the utility model, after the gas enters the gas mixing tube 130, it can also drive the external air to enter the gas mixing tube 130 through the air inlet 133, and form a gas-air mixed gas in the gas mixing tube 130 to support combustion. Compared with the conventional ejector tube, such a gas mixing tube 130 has a simpler structure and lower cost.

[0042] In the burner head 100 provided by the utility model, after the gas enters the gas mixing pipe 130 from the gas injection assembly 300, the gas flow rate flowing out from the gas injection assembly 300 is relatively large, and the pressure difference can be used to attract external air into the gas mixing pipe 130 at the air inlet 133, so that the gas and air can be mixed in the gas mixing pipe 130. In such a burner head 100, the gas mixing pipe 130 replaces the conventional ejector pipe, and such a gas mixing pipe 130 only needs to be provided with an air inlet 133 on the pipe wall 132 between the gas inlet end 131 and the gas outlet end 134. Compared with the existing ejector pipe, the gas mixing pipe 130 has a simpler structure, which is not only convenient for molding and manufacturing, but also can reduce the overall cost.

[0043] In one embodiment of the utility model, the inner diameter of the mixing tube 130 can remain unchanged from the air inlet end 131 to the air outlet end 134, that is, the inner diameter of the mixing tube 130 remains unchanged in its own axial direction. Such a mixing tube 130 can 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 can be much lower than that of a conventional ejector tube.

[0044] In one embodiment of the present invention, see Figure 1 and Figure 2 The 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 N of the mixing tube 130 to the length M of the ejector tube 120 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 mixing tube 130 may be 20 to 30 mm, for example, the length N of the mixing tube 130 may be 20 mm, 23 mm, 24 mm or 30 mm. When the ratio of the length N of the mixing tube 130 to the length M of the ejector tube 120 is no greater than 1 / 2, the gas-air mixed gas formed through the mixing tube 130 can also meet the needs of low-fire combustion, and 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; because the gas mixing pipe 130 can have a shorter length, when the second gas outlet pipe 112, the first gas outlet pipe 111, the ejector pipe 120, the gas mixing pipe 130 and the base body 110 are an integrated structure, the overall structure can occupy a smaller space and the overall cost can also be lower.

[0049] In one embodiment of the present invention, see Figure 3 The jet assembly 300 may have a nozzle opening 320, and the nozzle opening 320 may be located in the mixing pipe 130. The air inlet 133 may have a first end 1331 close to the air inlet end 131 and a second end 1332 away from the air inlet end 131. The nozzle opening 320 may be located between the first end 1331 and the air inlet end 131 in the axial direction of the mixing pipe 130 (direction XX in the figure). In the axial direction XX, when the nozzle opening 320 is located between the first end 1331 and the air inlet end 131, the nozzle opening 320 will not block the external air from entering the mixing pipe 130 from the air inlet 133. When the gas enters the mixing pipe 130, more external air can be driven to enter the mixing pipe 130 from the air inlet 133, which can ensure that the amount of air required for forming the gas-air mixed gas is sufficient, so that the effect of forming the gas-air mixed gas through the mixing pipe 130 can be better.

[0050] For example, the axial spacing A (shown as the distance A) between the nozzle opening 320 and the first end 1331 in the axial direction XX may be no greater than 2 mm. After the gas enters the gas mixing pipe 130 through the nozzle opening 320, as the gas flows in the gas mixing pipe 130 The flow rate of the gas will decrease, so when the axial spacing A between the nozzle opening 320 and the first end 1331 in the axial direction XX is large, it may cause the gas entering the gas mixing pipe 130 to flow to the vicinity of the air inlet 133. It is difficult to drive the external air to enter the gas mixing pipe 130 from the air inlet 133. The axial spacing A between the nozzle opening 320 and the first end 1331 in the axial direction XX is no greater than 2 mm, which can ensure that the gas entering the gas mixing pipe 130 can drive the external air to enter the gas mixing pipe 130 from the air inlet 133, thereby ensuring that a gas-air mixed gas can be formed through the gas mixing pipe 130, and the gas flow rate flowing in the gas mixing pipe 130 to the vicinity of the air inlet 133 is large, which can also make the effect of forming a gas-air mixed gas better.

[0051] In one embodiment of the present invention, see Figure 4 The jet assembly 300 may have a nozzle opening 320, and the nozzle opening 320 may be located in the mixing pipe 130. The air inlet 133 may have a first end 1331 close to the air inlet end 131 and a second end 1332 away from the air inlet end 131. The nozzle opening 320 may be located between the first end 1331 and the second end 1332 in the axial direction XX of the mixing pipe 130. The gas has the highest flow rate when it flows out from the nozzle opening 320. As the flow distance of the gas in the mixing pipe 130 increases, the gas flow rate will decrease. Therefore, in the axial direction XX, when the nozzle opening 320 is located between the first end 1331 and the second end 1332, the gas flowing out from the nozzle opening 320 can flow near the air inlet 133 at a relatively large flow rate, so that the ability to drive the external air from the air inlet 133 into the mixing pipe 130 through the pressure difference is stronger, and more external air can be driven into the mixing pipe 130, so that the effect of forming a gas-air mixed gas in the mixing pipe 130 is better.

[0052] For example, the axial spacing B between the nozzle opening 320 and the first end 1331 in the axial direction XX may be no greater than 2 mm. When the axial spacing B between the nozzle opening 320 and the first end 1331 in the axial direction XX is large, the portion of the jet assembly 300 located between the first end 1331 and the second end 1332 in the axial direction XX may form a barrier to the external air entering the mixing pipe 130 from the air inlet 133. When the axial spacing B between the nozzle opening 320 and the first end 1331 in the axial direction XX is no greater than 2 mm, the jet assembly 300 can provide less barrier to the external air entering the mixing pipe 130 on the basis of ensuring that the gas flowing out of the nozzle opening 320 can flow near the air inlet 133 at a relatively high flow rate, that is, on the basis of ensuring that the ability to drive the external air from the air inlet 133 into the mixing pipe 130 through the air pressure difference is relatively strong.

[0053] In one embodiment of the utility model, the jet assembly 300 may have a nozzle opening 320, and the nozzle opening 320 may be located in the mixing pipe 130. The air inlet 133 may have a first end 1331 close to the air inlet end 131 and a second end 1332 away from the air inlet end 131. The nozzle opening 320 may be aligned with the first end 1331 in the axial direction XX of the mixing pipe 130. The nozzle opening 320 is aligned with the first end 1331 in the axial direction XX, and the nozzle opening 320 will not block the external air from entering the mixing pipe 130 from the air inlet 133, and the gas flowing out from the nozzle opening 320 may flow near the air inlet 133 at a relatively large flow rate, so that the ability to drive the external air from the air inlet 133 to enter the mixing pipe 130 through the air pressure difference is stronger, and more external air can be driven to enter the mixing pipe 130, and the effect of forming a gas-air mixed gas in the mixing pipe 130 is also better.

[0054] In one embodiment of the present invention, see Figure 3 , Figure 4 and Figure 6, the length of the air inlet 133 in the axial direction XX of the mixing pipe 130 (the length P shown in the figure) can be 8 to 12 mm. For example, the length P of the air inlet 133 in the axial direction XX can be 8 mm, 9 mm, 10.5 mm or 12 mm. Preferably, the length P of the air inlet 133 in the axial direction XX can be 10 mm. When the length P of the air inlet 133 in the axial direction XX is small, it is equivalent to that the opening on the pipe wall 132 of the mixing pipe 130 is small, and it is difficult for external air to enter the mixing pipe 130 through the small opening. When the length P of the air inlet 133 in the axial direction XX is large, the gas in the mixing pipe 130 may flow to the outside of the mixing pipe 130 at the air inlet 133. For example, when there is a gas-air mixed gas reflux in the mixing pipe 130, the refluxed gas-air mixed gas will flow from the air inlet 133 to the outside of the mixing pipe 130, which will result in insufficient amount of gas-air mixed gas flowing to the first outlet pipe 111 to support combustion, and there is a safety hazard. When the length P of the air inlet 133 in the axial direction XX is 8 to 12 mm, the air inlet 133 is equivalent to a sufficiently large opening on the tube wall 132 of the mixing tube 130, and external air can enter the mixing tube 130 through such an air inlet 133. The amount of air entering the mixing tube 130 can meet the air amount required for forming an outer ring small fire combustion; the gas in the mixing tube 130 is also not easy to flow out from such an air inlet 133, thereby avoiding the safety hazard of the gas-air mixed gas flowing out of the air inlet 133 to the outside of the burner head 100.

[0055] In one embodiment of the present invention, see Figure 7 The air inlet 133 may be an arc-shaped notch on a plane perpendicular to the central axis of the mixing pipe 130. Such an air inlet 133 is easy to process, and the wall 132 of the mixing pipe 130 is provided with such an air inlet 133, so that the overall structure can be simpler and easier to implement.

[0056] For example, on a plane perpendicular to the central axis of the mixing tube 130, the air inlet 133 may be an arc-shaped notch, with the line connecting the two ends of the arc-shaped notch as the cutting line, the vertical distance from the vertex of the arc-shaped notch to the cutting line as D, the cross-sectional radius of the mixing tube 130 as R, and the relationship between the vertical distances D and R may be: D = 0.4R, D = 0.45R, D = 0.5R, D = 0.55R, D = 0.6R, etc., or in other words, the vertical distances D and R may satisfy 0.4R ≤ D ≤ 0.6R. Figure 7As shown, the plane parallel to the paper is the plane perpendicular to the central axis of the mixing tube 130. Since the air inlet 133 is an opening on the tube wall 132 of the mixing tube 130, the opening of the air inlet 133 in the circumferential direction of the tube wall 132 will also affect the inflow of external air and the outflow of internal air. The opening size of the air inlet 133 on the outer circumference of the mixing tube 130 can be described by the ratio of the vertical distance D to the cross-sectional radius R of the mixing tube 130. It can be understood that the larger the vertical distance D is relative to the cross-sectional radius R, the larger the opening of the air inlet 133 in the circumferential direction of the mixing tube 130, and the smaller the ratio of the vertical distance D to the cross-sectional radius R, the smaller the opening of the air inlet 133 in the circumferential direction of the mixing tube 130. When the ratio of the vertical distance D to the cross-sectional radius R is small, the opening of the air inlet 133 in the circumferential direction is small, which is equivalent to a small opening on the tube wall 132 of the mixing tube 130, and it will be difficult for external air to enter the mixing tube 130 through the small opening. When the ratio of the vertical distance D to the cross-sectional radius R is large, the opening of the air inlet 133 in the circumferential direction is large, and the gas in the mixing tube 130 may flow from the air inlet 133 to the outside of the mixing tube 130. For example, when there is a gas-air mixed gas reflux in the mixing tube 130, the refluxed gas-air mixed gas will flow from the air inlet 133 to the outside of the mixing tube 130, which will result in insufficient gas-air mixed gas flowing to the first outlet pipe 111 to support combustion, and there is a safety hazard. The vertical distance D satisfies 0.4R≤D≤0.6R, and the air inlet 133 is equivalent to a sufficiently large opening on the tube wall 132 of the mixing tube 130. External air can enter the mixing tube 130 through such an air inlet 133, and the amount of air entering the mixing tube 130 can meet the air amount required for forming an outer ring small fire combustion; the gas in the mixing tube 130 is also not easy to flow out from such an air inlet 133, thereby avoiding the safety hazard caused by the gas-air mixed gas flowing out of the air inlet 133 to the outside of the burner head 100.

[0057] For example, see Figure 7The jet assembly 300 may have a nozzle opening 320, and the nozzle opening 320 may be located in the gas mixing tube 130. On a plane perpendicular to the central axis of the gas mixing tube 130, the projection of the nozzle opening 320 and the vertex of the arc-shaped notch (vertex C in the figure) may be located on both sides of the central axis of the gas mixing tube 130. In such a burner 100, the central axis of the nozzle opening 320 is not coaxial with the central axis of the gas mixing tube 130, and it can be considered that the nozzle opening 320 and the air inlet 133 are located on both sides of the central axis of the gas mixing tube 130, respectively, so that the nozzle opening 320 can be considered to be relatively far away from the air inlet 133. By making the nozzle opening 320 relatively far away from the air inlet 133, it can be prevented that the gas flowing out of the nozzle opening 320 and the gas in the gas mixing tube 130 flow out of the gas mixing tube 130 from the air inlet 133, thereby avoiding the potential safety hazard caused by the gas-air mixed gas flowing out of the air inlet 133 to the outside of the burner 100. For example, when the vertical distance D satisfies D=0.5R, the opening of the air inlet 133 on the outer circumference of the mixing pipe 130 is already relatively large. On this basis, the nozzle opening 320 needs to be relatively far away from the air inlet 133 to prevent the gas flowing out of the nozzle opening 320 and the gas in the mixing pipe 130 from flowing out of the air inlet 133 to the outside of the mixing pipe 130. This means that when 0.4R≤D≤0.6R, the nozzle opening 320 is farther away from the air inlet 133 than when D=0.5R.

[0058] In one embodiment of the present invention, the jet assembly 300 may include a jet component 310, and 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, and an inner thread is provided on the inner side wall of the air inlet port 1311, and an outer thread is provided on the outer side wall of the jet component 310 on the jet assembly 300, and the jet component 310 is threadedly connected to the air inlet end 131 through the threaded cooperation of the inner thread and the outer thread, thereby realizing 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 can be located at a suitable position relative to the air mixing pipe 130, for example, the central axis of the jet component 310 can be non-coaxial with the central axis of the air mixing pipe 130. Thus, 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 gas mixing pipe 130. The nozzle opening 320 can be formed on the jet component 310, and the nozzle opening 320 can also be located at a suitable position accordingly, so that the gas flowing out of the nozzle opening 320 can drive the external air into the gas mixing pipe 130 with a stronger ability.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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: It comprises a seat body and a gas mixing pipe, wherein the gas mixing pipe is connected to the bottom of the seat body, and a first gas outlet pipe is arranged on the seat body, wherein the gas mixing pipe has an inlet end and an outlet end, and the outlet end is connected to the first gas outlet pipe; The mixing pipe is provided with an air inlet on the pipe wall between the air inlet end and the air outlet end. The air inlet end is connected with an injection assembly. The injection assembly has a nozzle opening. The nozzle opening is arranged close to 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: The nozzle opening is located in the mixing pipe, the air inlet has a first end close to the intake end and a second end away from the intake end, and the nozzle opening is located between the first end and the intake end in the axial direction of the mixing pipe.

4. The burner head according to claim 3, characterized in that: An axial distance A between the nozzle opening and the first end is no greater than 2 mm.

5. The burner head according to claim 1, characterized in that: The nozzle opening is located in the mixing pipe, the air inlet has a first end close to the intake end and a second end away from the intake end, and the nozzle opening is located between the first end and the second end in the axial direction of the mixing pipe.

6. The burner head according to claim 5, characterized in that: An axial distance B between the nozzle opening and the first end is no greater than 2 mm.

7. The burner head according to claim 1, characterized in that: The nozzle opening is located in the mixing pipe, the air inlet has a first end close to the intake end and a second end away from the intake end, and the nozzle opening is aligned with the first end in the axial direction of the mixing pipe.

8. The burner head according to claim 1, characterized in that: The length of the air inlet in the axial direction of the mixing pipe is 8 to 12 mm.

9. The burner head according to claim 1, characterized in that: On a plane perpendicular to the central axis of the mixing pipe, the air inlet is an arc-shaped notch.

10. The burner head according to claim 9, characterized in that: The connecting line between the two ends of the arc-shaped notch is used as the cutting line, the vertical distance from the vertex of the arc-shaped notch to the cutting line is D, the cross-sectional radius of the mixing pipe is R, and the vertical distance D satisfies 0.4R≤D≤0.6R.

11. The burner head according to claim 10, characterized in that: The nozzle opening is located in the mixing pipe. On a plane perpendicular to the central axis of the mixing pipe, the projection of the nozzle opening and the vertex of the arc-shaped notch are located on both sides of the central axis of the mixing pipe respectively.

12. The burner head according to any one of claims 1 to 11, 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.

13. The burner head according to claim 12, 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.

14. The burner head according to claim 12, 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.

15. The burner head according to claim 1, 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.

16. A burner, characterized in that: It comprises an air intake assembly, a flame distributor and a burner as claimed in any one of claims 1 to 15, wherein the air intake assembly is connected to an end of the jet assembly away from the gas mixing pipe, and the first gas outlet pipe is connected to the flame distributor.

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