Upper air inlet burner

Abstract

According to the upper air inlet burner, the shell is arranged on the upper air inlet burner, the shell is arranged at the position, corresponding to the primary air supplementing channel, of the air mixing chamber, and the lower end of the shell abuts against the upper surface of the dirt blocking disc, so that the primary air supplementing channel is physically blocked; and oil stains can be prevented from entering the gas mixing chamber to block key structures such as a nozzle gas outlet and an injection pipe inlet on the inner side of the shell. The open groove is formed in the surface of the shell, the open groove penetrates through the inner surface and the outer surface of the shell, and air can flow into the air mixing chamber from the open groove to be injected. The boss is arranged on the upper surface of the dirt blocking disc, the peripheral side shape of the boss corresponds to the shape of the lower end of the shell, and the peripheral side surface of the boss abuts against the inner surface of the lower end of the shell, so that oil dirt can be further prevented from flowing into the gas mixing chamber from the periphery of the upper surface of the dirt blocking disc; and therefore, the problem that the air is brought to key structures such as a nozzle and an injection pipe while being injected, and blockage is caused is solved.

Description

Technical Field

[0001] The utility model relates to the field of gas stoves, in particular to an upper air inlet burner. Background Art

[0002] The mixing chamber of the upper air inlet burner is located above the dirt retaining plate, and the surrounding side of the mixing chamber is open, and air enters the mixing chamber from the surrounding side of the mixing chamber. At the same time, the mixing chamber is also provided with corresponding nozzles and ejector pipes. When the nozzle sprays gas, the gas flows into the ejector pipe at a high speed, and at the same time, the fluid pressure at the ejector pipe is lower than the fluid pressure of the air around the mixing chamber, and an appropriate amount of air is ejected into the ejector pipe to meet the needs of gas combustion.

[0003] In the prior art, due to the presence of oil and dirt intercepted in the dirt baffle, the oil and dirt can easily enter the interior of the mixing chamber, and key structures such as the nozzle and the ejector tube are open, so the oil and dirt may adhere to these key structures, causing blockage and affecting user use. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defect in the prior art that the oil dirt in the dirt blocking plate is easy to block the key structures such as the nozzle and the ejector pipe, and provide an upper air inlet burner.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A top-inlet burner comprises a dirt baffle and an air mixing chamber, wherein the air mixing chamber is located above the dirt baffle, and a primary air supplement channel is formed between the air mixing chamber and the dirt baffle.

[0007] The upper air inlet burner also includes a shell, which is arranged on the air mixing chamber and corresponds to the primary air replenishment channel. The lower end of the shell abuts against the upper surface of the dirt baffle plate, and a groove is provided on the surface of the shell, and the groove runs through the inner surface and the outer surface of the shell.

[0008] The upper surface of the dirt shielding plate has a boss, the peripheral shape of the boss corresponds to the shape of the lower end of the shell, and the peripheral surface of the boss abuts against the inner surface of the lower end of the shell.

[0009] In the present technical solution, a shell is arranged on the upper air inlet burner, and the shell is arranged at a position in the mixing chamber corresponding to the primary air replenishment channel, so that the lower end of the shell is abutted against the upper surface of the dirt baffle plate to achieve physical barrier to the primary air replenishment channel, thereby preventing oil and dirt from entering the interior of the mixing chamber and clogging key structures such as the nozzle outlet and the ejector pipe inlet on the inner side of the shell.

[0010] On this basis, by providing a slot on the surface of the shell, and making the slot penetrate the inner and outer surfaces of the shell, the air can flow from the slot into the mixing chamber and be ejected, thereby ensuring the one-time air replenishment capacity. At the same time, a boss is provided on the upper surface of the dirt shielding plate, and the peripheral shape of the boss corresponds to the shape of the lower end of the shell, and the peripheral surface of the boss abuts against the inner surface of the lower end of the shell, which can further prevent oil from flowing into the mixing chamber from the outer periphery of the upper surface of the dirt shielding plate, and then being carried to key structures such as the nozzle and ejection pipe by the air while ejecting the air, causing blockage problems.

[0011] Preferably, a positioning column is further provided on the inner surface of the shell.

[0012] The upper surface of the dirt-blocking plate further includes a first notch, and the positioning column can be correspondingly embedded in the first notch, and the first notch is located on the peripheral side of the boss.

[0013] In this technical solution, when the positioning posts on the inner surface of the shell are correspondingly embedded in the first notches on the circumferential side of the boss, the shell will not be displaced or rotated on the surface of the boss. That is, by setting the matching positioning posts and the first notches to achieve position limiting, the shell and the boss can be stably positioned and matched.

[0014] Preferably, the number of the positioning posts and the number of the first notches are both greater than or equal to two.

[0015] In the present technical solution, by setting the number of the positioning columns and the number of the first notches to be greater than or equal to two, the housing and the boss can be further positioned and matched stably.

[0016] Preferably, the upper air inlet burner further includes a gas inlet pipeline, and the shell further includes a second notch, the second notch is located beside the gas inlet pipeline, and the second notch and the positioning column are evenly distributed along the circumferential direction.

[0017] In this technical solution, the gas intake pipe is passed through the second notch, which plays a directional role in the installation of the shell; the second notch and the positioning column are evenly distributed along the circumference, achieving the effect of jointly and evenly positioning the shell, which can further enable the shell and the boss to be stably positioned and matched.

[0018] Preferably, there are a plurality of slots on the shell, the plurality of slots are arranged in parallel, and the slots are arranged in a ring in the circumferential direction of the shell.

[0019] In the technical solution, a plurality of slots are arranged in a circumferential direction of the shell and are arranged parallel to each other, so that the primary air passing through the slots is rectified, thereby improving the uniformity of the injection.

[0020] Preferably, the angle of the slot relative to the central axis of the gas mixing chamber is greater than or equal to 120°.

[0021] In the present technical solution, by setting the angle of the groove relative to the central axis of the mixing chamber to be greater than or equal to 120°, the circumferential distribution range of the groove on the shell surface can be ensured, thereby ensuring that the primary air enters the mixing chamber evenly along the circumference of the mixing chamber, further improving the uniformity of the injection.

[0022] Preferably, there are multiple slots on the shell, and the multiple slots are equidistantly distributed.

[0023] In the technical solution, by arranging a plurality of the slots to be evenly distributed, it is possible to ensure that the primary air enters the mixing chamber evenly along the axial direction of the mixing chamber, thereby further improving the uniformity of the injection.

[0024] Preferably, the upper air inlet burner further comprises a fire cover, the lower end of the fire cover is fitted with the upper end of the shell, and the diameter of the lower end of the fire cover is larger than the diameter of the shell.

[0025] In the present technical solution, by setting the diameter of the fire cover of the upper air inlet burner to be larger than the diameter of the lower end of the shell, and the lower end of the fire cover and the upper end of the shell are interlocked, the secondary air ratio can be made uniform, the ignition condition of the burner is improved, and the fire cover can be stably placed during the use of the upper air inlet burner.

[0026] Preferably, the upper end of the shell includes a first embedding portion, the lower end of the fire cover includes a second embedding portion, the first embedding portion and the second embedding portion are embedded with each other, and the first embedding portion is located outside the second embedding portion.

[0027] In the present technical solution, by arranging the first interlocking part at the upper end of the shell and the second interlocking part at the lower end of the fire cover to interlock with each other, and the first interlocking part is located on the outside of the second interlocking part, the fire cover can be further placed stably to avoid the fire cover slipping.

[0028] Preferably, a diameter of the first engaging portion is greater than a diameter of a lower end of the housing.

[0029] In the present technical solution, by setting the diameter of the first engaging portion to be larger than the diameter of the lower end of the shell, it is possible to avoid a sudden change in size of the junction between the lower end of the fire cover and the upper end of the shell, which would cause the formed platform to easily accommodate oil stains.

[0030] The positive and progressive effects of the utility model are:

[0031] In the technical scheme, by arranging a shell on the upper air inlet burner, and arranging the shell at the position of the air mixing chamber corresponding to the primary air replenishment channel, the lower end of the shell is abutted against the upper surface of the dirt shielding plate to achieve physical blocking of the primary air replenishment channel, which can prevent oil from entering the interior of the air mixing chamber and blocking the key structures such as the nozzle air outlet and the ejector pipe inlet on the inner side of the shell. On this basis, by arranging a groove on the surface of the shell, and making the groove run through the inner and outer surfaces of the shell, the air can flow into the interior of the air mixing chamber from the groove and be ejected, thereby ensuring the primary air replenishment capacity. At the same time, a boss is arranged on the upper surface of the dirt shielding plate, and the peripheral side shape of the boss corresponds to the lower end shape of the shell, and the peripheral side surface of the boss is abutted against the inner surface of the lower end of the shell, which can further prevent oil from flowing into the interior of the air mixing chamber from the outer periphery of the upper surface of the dirt shielding plate, and then being carried to the key structures such as the nozzle and the ejector pipe by the air while ejecting the air, causing the problem of blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of an upper air inlet burner according to an embodiment of the utility model.

[0033] Figure 2 This is a schematic diagram of the longitudinal section structure of an upper air inlet burner according to an embodiment of the utility model.

[0034] Figure 3 This is a schematic cross-sectional structure diagram of an upper air inlet burner according to an embodiment of the utility model.

[0035] Figure 4 It is a schematic diagram of the three-dimensional structure of a shell according to an embodiment of the utility model.

[0036] Figure 5 It is a schematic diagram of the three-dimensional structure of a dirt blocking plate according to an embodiment of the utility model.

[0037] Description of reference numerals:

[0038] Dirt plate 1

[0039] Boss 11

[0040] First Gap 12

[0041] Mixing chamber 2

[0042] Shell 3

[0043] Slot 31

[0044] Positioning column 32

[0045] Second gap 33

[0046] first fitting part 34

[0047] Nozzle outlet 41

[0048] Gas intake pipe 42

[0049] Ejector tube 5

[0050] Fire cover 6

[0051] Second fitting portion 61 DETAILED DESCRIPTION

[0052] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0053] like Figure 1-Figure 5 As shown, this embodiment provides an upper air inlet burner, which includes a dirt baffle plate 1 and an air mixing chamber 2. The air mixing chamber 2 is located above the dirt baffle plate 1, and a primary air replenishment channel is formed between the air mixing chamber 2 and the dirt baffle plate 1.

[0054] See also Figure 4 A shell 3 is provided on the upper air inlet burner, and the shell 3 is provided at a position of the mixing chamber 2 corresponding to the primary air replenishment channel, so that the lower end of the shell 3 abuts against the upper surface of the dirt baffle 1 to achieve physical blocking of the primary air replenishment channel. In this way, it can be prevented that oil and dirt enter the mixing chamber 2 and block key structures such as the nozzle outlet 41 and the inlet of the ejector pipe 5 on the inner side of the shell 3.

[0055] On this basis, a slot 31 is provided on the surface of the shell 3, and the slot 31 penetrates the inner surface and the outer surface of the shell 3. In this way, air can flow from the slot 31 into the mixing chamber 2 and be ejected, thereby ensuring the primary air replenishment capability.

[0056] See also Figure 5 At the same time, the upper surface of the dirt shielding plate 1 has a boss 11, the peripheral shape of the boss 11 corresponds to the lower end shape of the shell 3, and the peripheral surface of the boss 11 abuts against the inner surface of the lower end of the shell 3. This can further prevent the oil from flowing from the outer periphery of the upper surface of the dirt shielding plate 1 into the mixing chamber 2, and then being carried to the key structures such as the nozzle outlet 41 and the inlet of the ejection pipe 5 while the air is ejected, causing the problem of blockage.

[0057] In this embodiment, the inner surface of the housing 3 is further provided with a positioning column 32 . The upper surface of the dirt-blocking plate 1 further includes a first notch 12 , in which the positioning column 32 can be correspondingly embedded. The first notch 12 is located on the peripheral side of the boss 11 .

[0058] In this way, when the positioning columns 32 on the inner surface of the housing 3 are correspondingly embedded in the first notches 12 located on the peripheral side of the boss 11, the housing 3 will not be displaced or rotated on the surface of the boss 11. That is, by providing the matching positioning columns 32 and the first notches 12 to achieve positioning, the housing 3 and the boss 11 can be stably positioned and matched.

[0059] In this embodiment, the number of the positioning posts 32 and the number of the first notches 12 are both three. In this way, the housing 3 and the boss 11 can be further positioned and matched stably. Of course, in other embodiments, the number of the positioning posts 32 and the number of the first notches 12 can also be set to other values ​​greater than or equal to two.

[0060] In this embodiment, the upper air inlet burner further includes a gas inlet pipe 42, and the housing 3 further includes a second notch 33, which is located beside the gas inlet pipe 42. In this way, the gas inlet pipe 42 is passed through the second notch 33, which plays a directional role in the installation of the housing 3. The second notch 33 and the positioning column 32 are evenly distributed along the circumferential direction. In this way, the effect of uniformly positioning the housing 3 is achieved, and the housing 3 and the boss 11 can be further stably positioned and matched.

[0061] In this embodiment, Figure 3 and Figure 4 As shown, in this embodiment, four groups of slots 31 are provided on the housing 3. Figure 3 As shown, the distribution ranges of the four groups of slots 31 on the shell are α1, α2, α3, and α4 respectively. Figure 4 As shown, each group of slots 31 on the housing 3 has three slots, the three slots are arranged in parallel in the horizontal direction, and the slots are arranged in a ring around the housing 3. In this way, the slots 31 formed by these slot structures can rectify the primary air, thereby improving the uniformity of the injection. Of course, in other embodiments, the number of slots in each group of slots can also be set to other values.

[0062] In this embodiment, Figure 3 and Figure 4 , the angle of the slot 31 relative to the central axis of the mixing chamber 2 is α, α = α1 + α2 + α3 + α4 = 150°. In this way, it can be ensured that the primary air enters the mixing chamber 2 uniformly along the circumference of the mixing chamber 2, further improving the uniformity of the injection. Of course, in other implementations, setting the angle of the slot relative to the central axis of the mixing chamber to other values ​​greater than or equal to 120° can also achieve similar effects.

[0063] In this embodiment, the three slots 31 are equidistantly distributed, so that the primary air can be ensured to enter the mixing chamber 2 evenly along the axial direction of the mixing chamber 2, further improving the uniformity of the injection.

[0064] In this embodiment, the upper air inlet burner further includes a fire cover 6, the lower end of the fire cover 6 is engaged with the upper end of the shell 3, the diameter of the fire cover 6 is D1, the diameter of the lower end of the shell 3 is D2, and D1>D2. In this way, the secondary air ratio can be uniform, the ignition condition of the burner can be improved, and the fire cover 6 can be stably placed during the use of the upper air inlet burner.

[0065] In this embodiment, the upper end of the housing 3 includes a first fitting portion 34, and the lower end of the fire cover 6 includes a second fitting portion 61. The first fitting portion 34 and the second fitting portion 61 are fitted together, and the first fitting portion 34 is located outside the second fitting portion 61. In this way, the fire cover 6 can be further stably placed to prevent the fire cover 6 from slipping off.

[0066] In this embodiment, the diameter of the first engaging portion 34 is D3, and D3>D2.

[0067] In the present technical solution, by setting the diameter of the first engaging portion 34 to be larger than the diameter of the housing 3, it is possible to avoid a sudden change in the size of the junction between the lower end of the fire cover 6 and the upper end of the housing 3, which would cause the formed platform to easily contain oil stains. In the present embodiment, D1=D3 is set. In other embodiments, the quantitative relationship between the diameter of the fire cover 6 and the diameter of the first engaging portion 34 can also be set to other relationships that can cooperate with each other.

[0068] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A top-inlet burner, comprising a dirt shielding plate and an air mixing chamber, wherein the air mixing chamber is located above the dirt shielding plate, and a primary air replenishment channel is formed between the air mixing chamber and the dirt shielding plate, characterized in that: The upper air inlet burner further comprises a shell, which is arranged on the air mixing chamber and corresponds to the primary air replenishment channel, the lower end of the shell abuts against the upper surface of the dirt baffle plate, and a groove is arranged on the surface of the shell, and the groove runs through the inner surface and the outer surface of the shell; The upper surface of the dirt-blocking plate has a boss, the peripheral shape of the boss corresponds to the shape of the lower end of the shell, and the peripheral surface of the boss abuts against the inner surface of the lower end of the shell; A nozzle air outlet is provided on the inner side of the shell, and the nozzle air outlet is located above the boss.

2. The upward air inlet burner according to claim 1, characterized in that: The inner surface of the shell is also provided with a positioning column; The upper surface of the dirt-blocking plate further includes a first notch, and the positioning column can be correspondingly embedded in the first notch, and the first notch is located on the peripheral side of the boss.

3. The upward air inlet burner according to claim 2, characterized in that: The number of the positioning posts and the number of the first notches are both greater than or equal to two.

4. The upward air inlet burner according to claim 2, characterized in that: The upper air inlet burner further includes a gas inlet pipeline, and the shell further includes a second notch, the second notch is located beside the gas inlet pipeline, and the second notch and the positioning column are evenly distributed along the circumferential direction.

5. The upward air inlet burner according to claim 1, characterized in that: There are a plurality of slots on the shell, the plurality of slots are arranged in parallel, and the slots are arranged in a ring in the circumferential direction of the shell.

6. The upward air inlet burner according to claim 1, characterized in that: An angle of the slot relative to a central axis of the gas mixing chamber is greater than or equal to 120°.

7. The upward air inlet burner according to claim 1, characterized in that: There are multiple slots on the shell, and the multiple slots are evenly distributed.

8. The upward air inlet burner according to claim 1, characterized in that: The upper air inlet burner further comprises a fire cover, the lower end of the fire cover is embedded in the upper end of the shell, and the diameter of the fire cover is larger than the diameter of the lower end of the shell.

9. The upward air inlet burner according to claim 8, characterized in that: The upper end of the shell includes a first embedding portion, and the lower end of the fire cover includes a second embedding portion. The first embedding portion and the second embedding portion are embedded with each other, and the first embedding portion is located outside the second embedding portion.

10. The upward air inlet burner according to claim 9, characterized in that: The diameter of the first fitting portion is larger than the diameter of the lower end of the housing.

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