An infrared burner with upward air intake

Abstract

The application discloses an upper air inlet infrared burner, which comprises a base assembly and a combustion body assembly. The base assembly comprises a base body and a fixing seat. The fixing seat is arranged on the top of the base body. Two mounting holes and two clamping positions for secondary air are arranged on the fixing seat. The mounting holes vertically pass through the fixing seat and the base body respectively. The two clamping positions are arranged on the outer side of the mounting holes in a circumferential interval. The combustion body assembly is detachably installed on the top of the base body and has a central cavity with upper and lower openings. A gap is formed between the base body and the combustion body assembly. The upper end of the fixing seat is inserted into the central cavity. The central cavity is communicated with the mounting holes and the two clamping positions respectively. The upper air inlet infrared burner is convenient for supplementing secondary air to the combustion body assembly and can prevent and guide the installation of the combustion body assembly.

Description

Technical Field

[0001] This invention relates to the field of stove technology, and in particular to an upward-intake infrared burner. Background Technology

[0002] Naturally ejected infrared gas stoves on the market generally have a higher primary air coefficient than atmospheric gas stoves. However, during continuous combustion, the primary air coefficient is not always greater than 1 in fully premixed combustion. A small amount of secondary air is also required during combustion; otherwise, incomplete combustion of gas will lead to excessive CO emissions.

[0003] For integrated products such as integrated stoves and integrated cooking centers, the stove module cavity is more suitable for using burners with an upward air intake structure (either because of negative pressure or because of steam or heat dissipation airflow from the integrated product). If the stove bottom shell is sealed or the negative pressure cannot replenish secondary air, the burner needs to replenish secondary air from outside the stove cavity. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the problems existing in the prior art. To this end, the present invention proposes an upper air intake infrared burner. The setting of the fixing base not only facilitates the replenishment of secondary air to the burner assembly, but also plays a role in preventing mistakes and guiding the installation of the burner assembly.

[0005] The aforementioned top-inlet infrared burner is achieved through the following technical solution:

[0006] An upward-intake infrared burner includes: a base assembly comprising a base body and a fixing seat, the fixing seat being disposed on the top of the base body, the fixing seat having a mounting hole and two slots for secondary air passage, the mounting hole vertically penetrating the fixing seat and the base body respectively, and the two slots being circumferentially spaced outside the mounting hole; and a burner assembly detachably mounted on the top of the base body and having a central cavity with openings at both the top and bottom ends, a gap being formed between the base body and the burner assembly, the upper end of the fixing seat being inserted into the central cavity, and the central cavity communicating with the mounting hole and the two slots respectively.

[0007] In some embodiments, two of the locking positions are circumferentially spaced on the outer wall of the fixing seat, and the central cavity is connected to the gap through the locking positions.

[0008] In some embodiments, the mounting base is provided with a vertically arranged sliding groove with an open top, the lower end of the sliding groove penetrating downward through the bottom of the base body, and the central cavity communicating with the atmosphere below the base body through the sliding groove.

[0009] In some embodiments, the two locking positions vertically penetrate the fixing base and the base body, respectively, and the central cavity is connected to the atmosphere below the base body through the locking positions.

[0010] In some embodiments, the fixing base is provided with a vertically arranged sliding groove with an open upper end, the lower end of the sliding groove being closed, or the lower end of the sliding groove penetrating downward through the bottom of the base body; the two locking positions are connected through the sliding groove, and the central cavity is connected to the sliding groove.

[0011] In some embodiments, a vent is provided on the outer wall of the fixed base for secondary air to pass through, and the slide groove is connected to the gap through the vent.

[0012] In some embodiments, the fixing seat is integrally formed with the base body, or the lower end of the fixing seat is detachably connected to the base body by fasteners.

[0013] In some embodiments, the upper end of the fixing seat and the lower end of the central cavity are both in the shape of a "D", an ellipse or a polygon; and / or, a positioning structure is provided between the fixing seat and the cavity wall of the central cavity.

[0014] In some embodiments, the positioning structure includes a flange and a slot that engage with each other. At least one slot is provided at the lower end of the cavity wall of the central cavity, and the flange is provided on the outer wall of the fixing seat at a position corresponding to the slot. The flange engages with the slot.

[0015] In some embodiments, an ignition assembly is also included, which is movably and vertically inserted through the central cavity and the mounting hole, and has a positioning rod that can move between the two locking positions so that the ignition assembly can switch between a locked position and an unlocked position.

[0016] In some embodiments, the ignition assembly includes an ignition needle that is movably and vertically inserted through the central cavity and the mounting hole. A positioning rod is provided at the lower end of the ignition needle, and a discharge part is provided at the upper end of the ignition needle. The free end of the discharge part can be moved to the radially inner side of the top of the combustion body assembly or retracted to directly above the central cavity.

[0017] In some embodiments, the ignition assembly further includes an elastic element and a retaining ring, the retaining ring being disposed below the base body and clamping the lower end of the ignition needle, and the elastic element being fitted around the lower end of the ignition needle and clamped between the retaining ring and the fixing seat.

[0018] In some embodiments, the combustion body assembly further includes an inner annular cavity, an outer annular cavity, an inner ejector tube, and an outer ejector tube, wherein the inner ejector tube is connected to the inner annular cavity and the outer ejector tube is connected to the outer annular cavity; the base body is provided with an inner annular air passage and an outer annular air passage, wherein the inner annular air passage is connected to the inner ejector tube through an inner annular nozzle, and the outer annular air passage is connected to the outer ejector tube through an outer annular nozzle.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] 1. The top-inlet infrared burner of the present invention detachably installs the burner assembly on the top of the base assembly, and provides a fixing seat with mounting holes and locking positions on the base assembly. The fixing seat is inserted into the central cavity of the burner assembly, which facilitates the supply of secondary air to the central cavity of the burner assembly through the fixing seat, and at the same time plays a role in preventing mistake and guiding the installation of the burner assembly.

[0021] 2. By movably inserting the ignition component into the central cavity of the combustion body assembly and detachably connecting it to the base assembly, the ignition component can be switched between a locked position and an unlocked position, and the combustion body assembly can be removed and cleaned without removing the ignition component.

[0022] 3. By integrating the fixing base and the base body into one piece, the structure is simple and the cost is low. Attached Figure Description

[0023] Figure 1 This is an exploded view of the upper air intake infrared burner in Embodiment 1 of the present invention;

[0024] Figure 2 This is a cross-sectional view of the upper air intake infrared burner in Embodiment 1 of the present invention;

[0025] Figure 3 This is a schematic diagram of the base assembly in Embodiment 1 of the present invention;

[0026] Figure 4 This is an exploded view of the combustion body assembly in Embodiment 1 of the present invention;

[0027] Figure 5 This is a cross-sectional view of the combustion body assembly with a heat insulation plate in Embodiment 1 of the present invention;

[0028] Figure 6 This is a schematic diagram of the burner head structure in Embodiment 1 of the present invention. Figure 1 ;

[0029] Figure 7 This is a schematic diagram of the burner head structure in Embodiment 1 of the present invention. Figure 2 ;

[0030] Figure 8This is a schematic diagram of the structure of the inner cup and outer disc in Embodiment 1 of the present invention;

[0031] Figure 9 This is a schematic diagram of the heat insulation plate in Embodiment 1 of the present invention;

[0032] Figure 10 This is a top view of the base assembly in Embodiment 2 of the present invention;

[0033] Figure 11 This is an exploded view of the upper air intake infrared burner in Embodiment 3 of the present invention;

[0034] Figure 12 This is a schematic diagram of the structure of the upper air intake infrared burner in Embodiment 3 of the present invention;

[0035] Figure 13 This is a cross-sectional view of the upper air intake infrared burner in Embodiment 3 of the present invention;

[0036] Figure 14 This is a schematic diagram of the ignition assembly installed on the base assembly in Embodiment 3 of the present invention;

[0037] Figure 15 This is a cross-sectional view of the upper air intake infrared burner in Embodiment 4 of the present invention;

[0038] Figure 16 This is a schematic diagram of the ignition assembly installed on the base assembly in Embodiment 4 of the present invention;

[0039] Figure 17 This is an exploded view of the base assembly in Embodiment 4 of the present invention;

[0040] Figure 18 It is the top-inlet infrared burner in Embodiment 5 of the present invention.

[0041] In the diagram: 11-combustion body assembly, 111-inner annular gas chamber, 112-outer annular gas chamber, 113-central cavity, 1131-upper slot, 12-ignition assembly, 121-discharge section, 122-flame sensing section, 13-base assembly, 131-inner annular gas passage, 132-outer annular gas passage, 14-decorative cover; 23-first switch;

[0042] 41-Burnhead, 411-Inner ejector tube, 412-Outer ejector tube, 4131-Inner air inlet chamber, 4132-Inner mounting groove, 4141-Outer air inlet chamber, 4142-Outer mounting groove, 415-Inner annular boss, 416-Outer annular boss, 417-Positioning post, 42-Inner cup body, 421-Limiting step, 422-Lower flange edge, 43-Outer disc body, 431-Inner flange, 432-Support platform, 44-Combustion plate, 45-Heat insulation plate, 451-Ventilation hole, 452-Flow guide, 453-Flow guide plate, 454-Outer flange, 46-Connector;

[0043] 51-Ignition needle, 511-Positioning rod, 52-Elastic element, 53-Snap ring;

[0044] 61-Fixed base, 610-Ventilation port, 611-Mounting hole, 612-Card slot, 613-Slide groove, 614-Flange, 615-Notch, 616-Ear, 617-Limiting part, 62-Fastener, 63-Base body, 631-Receiving groove, 632-Reinforcing rib, 633-Wire hole, 641-Inner ring nozzle, 642-Outer ring nozzle. Detailed Implementation

[0045] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific embodiments of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solutions claimed in the present invention.

[0046] Example 1

[0047] refer to Figure 1-3 This embodiment provides an upper air intake infrared burner, including a burner assembly 11 and a base assembly 13. The base assembly 13 includes a base body 63 and a fixing seat 61. The fixing seat 61 is disposed on the top of the base body 63. In this embodiment, the fixing seat 61 and the base body 63 are integrally formed to facilitate rapid processing and manufacturing, simplify the structure, reduce assembly steps, and reduce costs. The mounting base 61 is provided with a mounting hole 611 and two locking positions 612 for secondary air passage. In this embodiment, the mounting hole 611 vertically penetrates the mounting base 61 and the base body 63 respectively. The two locking positions 612 are circumferentially spaced outside the mounting hole 611 and vertically penetrate the mounting base 61 and the base body 63 respectively, so that the lower end of the mounting hole 611 and the lower end of the two locking positions 612 are connected to the atmosphere below the base body 63. One locking position 612 is a locked position, and the other locking position 612 is an unlocked position or zero position. The ignition component can move between the two locking positions 612 so that the ignition component can switch between the locked position and the unlocked position.

[0048] The combustion element assembly 11 has a central cavity 113 with openings at both the top and bottom. During installation, the combustion element assembly 11 can be detachably installed on the top of the base body 63, forming a gap (not shown in the figure) between the base body 63 and the combustion element assembly 11 for air passage. The upper end of the fixing seat 61 is inserted into the central cavity 113, which is connected to the mounting hole 611 and two locking positions 612 respectively. At this time, the central cavity 11 can be connected to the atmosphere below the base body 63 through the locking positions 612 to form a first secondary air replenishment channel.

[0049] As can be seen, by detachably installing the burner assembly 11 on the top of the base body 63 and inserting the upper end of the fixing seat 61 into the central cavity 113 of the burner assembly 11, the fixing seat 61 serves two purposes: firstly, it prevents mistaken installation and provides guidance; secondly, it allows secondary air to be supplied to the central cavity 113 through the locking slot 612 on the fixing seat 61, so that the inner ring flame of the burner assembly 11 can burn more completely.

[0050] Furthermore, the fixed base 61 is provided with a vertically arranged, open-topped slide groove 613. The lower end of the slide groove 613 extends downward through the bottom of the base body 63. The slide groove 613 is positioned between two locking positions 612, which are connected by the slide groove 613. The central cavity 113 is connected to the atmosphere below the base body 63 through the slide groove 613. In this way, by providing the slide groove 613 on the fixed base 61, material is saved, demolding is facilitated, costs are reduced, and the unit ventilation area of ​​the first secondary air replenishment channel is further increased. Connecting the two locking positions 612 also facilitates guiding the ignition assembly to move between the two locking positions 612. It should be noted that the lower end of the slide groove 613 can be designed to be closed.

[0051] Furthermore, an air vent 610 for secondary air to pass through is provided on the outer wall of the fixed base 61. There are one or more air vents 610. When there are multiple air vents 610, the multiple air vents 610 are circumferentially spaced on the outer wall of the fixed base 61. The slide groove 613 can be connected to the gap through the air vent 610 to form a second secondary air replenishment channel.

[0052] refer to Figure 2-5 Furthermore, to prevent the combustion body assembly 11 from rotating relative to the fixed base 61, the upper end of the fixed base 61 and the lower end of the central cavity 113 are both designed to be D-shaped, elliptical, or polygonal. In addition, a positioning structure is provided between the fixed base 61 and the cavity wall of the central cavity 113. The positioning structure includes a flange 614 and a groove 1131 that engage with each other. At least one groove 1131 is provided at the lower end of the cavity wall of the central cavity 113, and a flange 614 protrudes from the outer wall of the fixed base 61 at a position corresponding to the groove 1131, the flange 614 engaging with the groove 1131.

[0053] refer to Figure 1-5Furthermore, the combustion body assembly 11 also has an inner annular cavity 111, an outer annular cavity 112, an inner ejector tube 411, and an outer ejector tube 412. The inner annular cavity 111 is disposed between the outer annular cavity 112 and the central cavity 113. The inner ejector tube 411 is connected to the inner annular cavity 111, and the outer ejector tube 412 is connected to the outer annular cavity 112. The base assembly 13 also includes an inner annular nozzle 641 and an outer annular nozzle 642. An inner annular air passage 131 and an outer annular air passage 132 are provided on the base body 63. An inner annular nozzle 641 is installed at the upper end of the inner annular air passage 131, which discharges air toward the inner ejector tube 411. The inner annular air passage 131 is connected to the inner ejector tube 411 through the inner annular nozzle 641. An outer ring nozzle 642 is installed at the upper end of the outer ring air passage 132, which discharges air toward the outer ejector tube 412. The outer ring air passage 132 is connected to the outer ejector tube 412 through the outer ring nozzle 642.

[0054] refer to Figure 4-8 The combustion body assembly 11 includes a gas distribution structure, which includes a burner head 41, an inner cup 42, and an outer disc 43. A central cavity 113 with openings at both the top and bottom is provided at the center of the burner head 41. An inner ejector tube 411 and an outer ejector tube 412 are provided at the bottom of the burner head 41. The inner cup 42 is located at the top of the burner head 41 and is situated around the central cavity 113. An upward-opening inner annular gas cavity 111 is formed between the inner cup 42 and the central cavity 113. In this embodiment, the inner annular gas cavity 111 is formed by the inner cup 42, the outer peripheral wall of the central cavity 113, and the top of the burner head 41. The inner annular gas cavity 111 is connected to the inner ejector tube 411. The outer plate 43 is detachably installed on the top of the burner head 41 and located on the periphery of the inner cup 42. An upward-opening outer ring gas cavity 112 is formed between the outer plate 43 and the inner cup 42. In this embodiment, the outer ring gas cavity 112 is formed by the inner cup 42, the outer plate 43 and the top of the burner head 41. The outer ring gas cavity 112 is connected to the outer ejector tube 412.

[0055] As can be seen, by designing the gas distribution structure to include an independent burner head 41, inner cup 42, and outer disc 43, the inner annular gas cavity 111 is formed by the inner cup 42, the outer peripheral wall of the central cavity 113, and the top of the burner head 41, and the outer annular gas cavity 112 is formed by the inner cup 42, the outer disc 43, and the top of the burner head 41, so that the gas distribution structure is designed in a split manner, which facilitates the molding and manufacturing of the burner head 41, inner cup 42, and outer disc 43, improves the yield, and enables complete top air intake.

[0056] refer to Figure 6-7The burner head 41 has a downward-recessed inner air inlet chamber 4131 and an inner mounting groove 4132 at the top. The inner air inlet chamber 4131 is located between the central cavity 113 and the inner cup body 42. The inner mounting groove 4132 spans the inner ring air cavity 111 and the outer ring air cavity 112. At least part of the inner ejector tube 411 is located in the inner mounting groove 4132 and is integrally formed with the two groove walls of the inner mounting groove. The air outlet end of the inner ejector tube 411 is connected to the inner ring air cavity 111 through the inner air inlet chamber 4131. The top of the burner head 41 is provided with two downward-facing, upward-opening external air inlet chambers 4141 and two external mounting grooves 4142. The two external air inlet chambers 4141 and two external mounting grooves 4142 are both located between the inner cup body 42 and the outer plate body 43, and are respectively located on opposite outer sides of the inner cup body 42. At least a portion of the external ejector tube 412 is disposed in the external mounting groove 4142 and integrally formed with the two groove walls. The outlet end of the external ejector tube 412 is connected to the outer annular gas chamber 112 through the corresponding external air inlet chamber 4141. This facilitates rapid processing, molding, and demolding of the burner head 41 and the inner and outer ejector tubes, and helps to reduce the vertical height of the burner head 41.

[0057] refer to Figure 4-8 An inner annular boss 415 extending upwards and located around the central cavity 113 is integrally formed on the radially inner side of the top of the burner head 41. The inner cup 42 is fitted onto the inner annular boss 415 and abuts or connects to the top of the burner head 41 to achieve radial positioning of the inner cup 42. In addition, a planar seal can be formed between the inner cup 42 and the inner annular boss 415. Furthermore, the inner cup 42 is provided with a circumferentially arranged and annular limiting step 421. The limiting step 421 is located above the inner annular boss 415 and abuts or gap-fits with the top of the inner annular boss 415. At this time, the inner annular boss 415 can limit the inner cup body downwards to prevent the inner cup body from being squeezed and deformed. Furthermore, an outwardly extending lower flange edge 422 is integrally formed on the lower periphery of the inner cup body 42. This lower flange edge 422 tightly abuts against the top of the burner head 41 to increase the contact area, thereby forming a planar seal between the lower flange edge 422 and the top of the burner head. This improves the sealing performance between the inner cup body 42 and the top of the burner head 41, ensuring a more stable and reliable installation of the inner cup body 42. Of course, the lower flange edge 422 can be detachably connected to the top of the burner head 41 by screws, or the lower flange edge 422 can be fixedly connected to the top of the burner head 41 by welding or bonding.

[0058] An upwardly extending outer annular boss 416 is integrally formed on the outer edge of the top of the burner head 41. Additionally, at least two upwardly extending positioning posts 417 are integrally formed on the radially outer side of the top of the burner head 41. All positioning posts 417 are circumferentially spaced, with each positioning post located radially inner to the outer annular boss 416 and integrally formed with it. An outer disc body 43 is fitted over the outer annular boss 416, and its lower end is integrally formed with an inwardly extending inner flange 431 that extends to the top of the outer annular boss 416 and the positioning posts 417. The inner flange 431 is detachably connected to the positioning posts 417 of the burner head 41 via a connector 46 (e.g., a screw), and the inner flange 43 is pressed tightly against the top of the outer annular boss 416. This ensures that the outer disc body 43 is securely and reliably detachably connected to the burner head 41, and forms a planar seal between the inner flange 43 and the outer annular boss 416, effectively guaranteeing the sealing performance between the outer disc body 43 and the burner head 41.

[0059] refer to Figure 4-5 The combustion body assembly 11 also includes a combustion plate 44, which is sandwiched between the outer disc body 43 and the outer wall of the central cavity 113, and covers the top opening of the inner annular gas cavity 111 and the top opening of the outer annular gas cavity 112 respectively. The inner cup body 42 is pressed tightly against the top of the burner head 41 by the combustion plate 44, which can effectively prevent cross-flow of gas between the inner and outer gas cavities.

[0060] refer to Figure 4-5 and Figure 8-9 In this embodiment, the gas distribution structure also includes a heat insulation plate 45, which is disposed in the outer annular gas cavity 112 and connected to the burner head 41. The heat insulation plate 45 presses the inner cup 42 and the outer disc 43 tightly against the top of the burner head 41 to further improve the secure and reliable installation of the inner cup and the outer disc. The heat insulation plate 45 has several vent holes 451 for the outer annular gas to pass through. All vent holes 451 are spaced apart along the circumferential direction of the heat insulation plate 45 to evenly distribute the gas in the outer annular gas cavity 112 into the pores of the combustion plate 44, thereby guiding the outer annular gas. Furthermore, the heat insulation plate 45 effectively blocks heat radiation from the lower side of the combustion plate to the lower side of the burner head, thus reducing the temperature rise of the burner head 41. In other embodiments of this embodiment, the heat insulation plate 45 can be omitted.

[0061] Furthermore, the vent 451 can be arranged at an angle in the vertical direction so that the vent 451 faces upwards. Of course, the vent 451 can also be designed to be arranged vertically, and a guide part 452 can be added to the radial inner end or the clockwise rear end of the vent 451. The guide part 452 is used to guide the outer ring gas flowing through it towards the clockwise direction or the radial outer side of the heat insulation plate 45, so as to guide the outer ring gas, and also to prevent the combustion plate 44 from directly radiating heat downwards, reducing the temperature rise of the burner head 41 and the gas stove panel, and improving the heat exchange efficiency of the burner 1.

[0062] Furthermore, a circumferentially arranged, ring-shaped limiting step 421 is provided in the middle of the inner cup 42. The radial inner end of the heat insulation plate 45 abuts against the top of the limiting step 421, pressing the inner cup 42 tightly against the top of the burner head 41. The radial outer end of the heat insulation plate 45 is detachably connected to the positioning post 417 of the burner head 41 via a connector 46 (e.g., a screw). Alternatively, the heat insulation plate 45 can be welded or bonded to the burner head 41, and the inner flange 43 of the outer plate 43 can be pressed tightly between the heat insulation plate 45 and the top of the outer annular boss 416.

[0063] In addition, a support platform 432 located below the combustion plate 44 is provided at the upper end of the outer plate 43. A guide plate 453 extending along the outer plate 43 is integrally formed on the outer edge of the heat insulation plate 45. The upper end of the guide plate 453 is bent outward to form an outward flange 454. The outward flange 454 is set on the top of the support platform 432 and abuts or connects with the support platform 432. In this way, the heat radiated downward by the combustion plate 44 can be better reduced by the guide plate 453, thereby reducing heat loss and improving the thermal efficiency of the burner 1.

[0064] Example 2

[0065] refer to Figure 10 The difference between this embodiment and embodiment 1 is that the setting position of the locking position 612 is different. In this embodiment, the two locking positions 612 are circumferentially spaced on the outer wall of the fixed base 61 and located above the top of the base body 63. The central cavity 113 is connected to the gap through the locking position 612 to form the first secondary air replenishment channel. In this way, the locking position 612 does not need to penetrate the base body 63 vertically, and can still replenish the secondary air required for combustion of the inner ring fire through the first secondary air replenishment channel.

[0066] Furthermore, the fixed base 61 is provided with a vertically arranged sliding groove 613 with an open upper end. The sliding groove 613 is arranged at intervals with the two locking positions 612, that is, the sliding groove 613 is not connected to either locking position 612. The lower end of the sliding groove 613 penetrates downward through the bottom of the base body 63. The central cavity 113 is connected to the atmosphere below the base body 63 through the sliding groove 613 to form a second secondary air replenishment channel, which facilitates the replenishment of secondary air and saves materials. Of course, the lower end of the sliding groove 613 can also be designed to be closed.

[0067] Furthermore, an air vent 610 for secondary air to pass through is provided on the outer wall of the fixed base 61. The number of air vents 610 is one or more. When there are multiple air vents 610, they are circumferentially spaced on the outer wall of the fixed base 61. The slide groove 613 can be connected to the gap through the air vent 610 to form a third secondary air replenishment channel.

[0068] Example 3

[0069] refer to Figure 11-14 The difference between this embodiment and embodiments 1 or 2 is that the upper-inlet infrared burner further includes an ignition assembly 12. The ignition assembly 12 is movably and vertically inserted through the central cavity 113 and the mounting hole 611. A positioning rod 511 that can move between two locking positions 612 is provided at the lower end of the ignition assembly 12, so that the ignition assembly 12 can switch between a locked position and an unlocked position. A discharge part 121 and a flame sensing part 122 are provided at the upper end of the ignition assembly 12, so that the ignition assembly 12 has dual functions of ignition and flameout sensing.

[0070] When the ignition assembly 12 is in the locked position 612, the free ends of the discharge section 121 and the flame sensing section 122 move to the radially inner side of the top of the burner assembly 11, which can limit the burner assembly 11, preventing it from being detached from the ignition assembly 12. Conversely, when the ignition assembly 12 is in the locked position 612, the free ends of the discharge section 121 and the flame sensing section 122 retract to the top of the central cavity 113. At this time, the burner assembly 11 can be detached from the ignition assembly 12, making it easy to remove the burner assembly 11 for cleaning. It should be noted that when the two locking positions 612 are connected by the slide groove 613 and the ignition assembly 12 needs to be switched, there is no need to lift or pull the ignition assembly 12 up significantly. Simply push the positioning rod 511 to move along the slide groove 613, which allows the positioning rod 511 to quickly switch between the two locking positions.

[0071] refer to Figure 13-14 Furthermore, a notch (not shown in the figure) is provided at the lower end of the fixing base 61 between the slide groove 613 and the mounting hole 611. The slide groove 613 is connected to the mounting hole 611 through the notch to save material. In addition, an upwardly extending limiting part 617 is integrally formed on the top of the fixing base 61. The limiting part 617 is arranged close to the locking position 612, and its upper end is inserted into the lower end of the central cavity 113. It is used to ensure that the ignition assembly 12 can only rotate within a designated area, preventing the ignition needle wire from getting tangled or even broken due to infinite rotation of the ignition assembly 12. It also serves as a handle for easy removal of the fixing base.

[0072] refer to Figure 11-14Furthermore, the ignition assembly 12 includes an ignition needle 51 having a discharge section 121 and a flame sensing section 122. The ignition needle 51 is movably and vertically inserted into the central cavity 113 and the mounting hole 611. The ignition needle 51 can move up and down relative to the combustion body assembly 11 and the base assembly 13 and rotate in the circumferential direction. A positioning rod 511 extending downward is provided at the lower end of the ignition needle 51. The positioning rod 511 can move between two locking positions 612. The discharge section 121 and the flame sensing section 122 are provided at the upper end of the ignition needle 51. The free ends of the discharge section 121 and the flame sensing section 122 can be moved to the radially inner side of the top of the combustion body assembly 11 or retracted to directly above the central cavity 113.

[0073] Furthermore, the ignition assembly 12 also includes an elastic element 52 and a retaining ring 53. The retaining ring 53 is located below the base body 63 and clamps the lower end of the ignition needle 51. The elastic element 52 is fitted outside the lower end of the ignition needle 51 and clamped between the retaining ring 53 and the fixing seat 61. In this way, the ignition needle 51 can be stably and reliably limited and fixed on the fixing seat 61, preventing the ignition needle 51 from being pulled upward out of the fixing seat 61.

[0074] Furthermore, the upper-intake infrared burner also includes a decorative cover 14, which is disposed above the burner assembly 11 and detachably connected to the upper end of the ignition assembly 12. The decorative cover 14 is used to cover the central cavity 113 in the middle of the burner assembly and the ignition assembly 12, and to decorate the burner to prevent foreign objects from falling onto the ignition assembly 12 and affecting ignition and use.

[0075] Example 4

[0076] refer to Figure 15-17 The difference between this embodiment and embodiment 1 or 2 is that the connection method between the fixing seat 61 and the base body 63 is different. In this embodiment, the fixing seat 61 and the base body 63 are detachably connected by fasteners 62 (e.g., screws) so that the fixing seat 61 is a detachable structure.

[0077] Furthermore, a receiving groove 631 suitable for embedding the lower end of the fixing seat 61 is recessed in the top of the base body 63 corresponding to the fixing seat 61. A wire hole 633 is provided on the bottom surface of a portion of the receiving groove 631 for the wire of the ignition assembly 12 to pass through. The lower end of the fixing seat 61 is inserted into the receiving groove 631. On the two opposite outer side walls of the lower end of the fixing seat 61, outwardly extending lugs 616 are integrally formed. The lugs 616 are fastened to the base body 63 by fasteners 62 (e.g., screws). In addition, to further enhance the strength of the base body 63, an upwardly extending reinforcing rib 632 is integrally formed in the top of the base body 63. The reinforcing rib is prismatic, and the receiving groove 631 transversely penetrates the reinforcing rib 632, dividing the reinforcing rib 632 into two parts.

[0078] Furthermore, the positioning structure also includes a lower retaining groove 6311. The lower retaining groove 6311 is recessed at the position of the flange 614 on the groove wall of the receiving groove 631. The lower end of the flange 614 engages with the lower retaining groove 6311 to limit the position of the fixing seat 61 through the flange 614 and the lower retaining groove 6311, which helps to further improve the stability and reliability of the installation of the fixing seat 61.

[0079] Example 5

[0080] refer to Figure 18 The difference between this embodiment and embodiments 3 or 4 is that the upper air intake infrared burner also includes a first switch 23. The first switch 23 is disposed on the air intake end of the outer ring air passage 132 and is used to control the on / off state of the outer ring air passage 132, thereby realizing the control of the air supply to the outer ring air chamber 112.

[0081] In this embodiment, the first switch 23 is preferably a time-delay valve. The time-delay valve is used to open after a delay when the ignition assembly 12 discharges and ignites, or to open immediately after successful ignition. It is also used to close immediately or after a delay after flameout. In particular, the time-delay valve can be configured to remain closed until successful ignition, thus avoiding frequent opening of the time-delay valve, which helps to improve the service life of the time-delay valve and effectively prevents gas from being supplied to the outer annular gas chamber 112 of the burner 1 when ignition fails. This improves the flame overflow phenomenon during cold ignition and the deflagration phenomenon during hot ignition.

[0082] It can be seen that by adding a first switch 23, which is used to delay opening when the ignition assembly 12 discharges and ignites, or to control it to open immediately after successful ignition, the inner ring gas chamber 111 of the burner 1 is supplied with gas before the outer ring gas chamber 112 of the burner 1. This can improve the phenomenon of burner flame overflow and hot ignition deflagration, and improve the safety and user experience.

[0083] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A top-inlet infrared burner, characterized in that, include: The base assembly (13) includes a base body (63) and a fixing seat (61). The fixing seat (61) is disposed on the top of the base body (63). The fixing seat (61) is provided with a mounting hole (611) and two slots (612) for secondary air passage. The mounting hole (611) vertically penetrates the fixing seat (61) and the base body (63) respectively. The two slots (612) are circumferentially spaced outside the mounting hole (611). The combustion body assembly (11) is detachably installed on the top of the base body (63) and has a central cavity (113) with openings at both the top and bottom ends. A gap is formed between the base body (63) and the combustion body assembly (11). The upper end of the fixing seat (61) is inserted into the central cavity (113). The central cavity (113) is connected to the mounting hole (611) and the two locking positions (612) respectively. The two locking positions (612) are circumferentially spaced on the outer wall of the fixing seat (61), and the central cavity (113) is connected to the gap through the locking positions (612); The fixed base (61) is provided with a vertically arranged sliding groove (613) with an open top. The lower end of the sliding groove (613) penetrates the bottom of the base body (63) downwards. The central cavity (113) is connected to the atmosphere below the base body (63) through the sliding groove (613). A vent (610) for secondary air to pass through is provided on the outer wall of the fixed base (61), and the slide groove (613) is connected to the gap through the vent (610).

2. The top-inlet infrared burner according to claim 1, characterized in that, The fixing seat (61) is integrally formed with the base body (63), or the lower end of the fixing seat (61) is detachably connected to the base body (63) by fasteners (62).

3. The top-inlet infrared burner according to claim 1, characterized in that, The upper end of the fixed seat (61) and the lower end of the central cavity (113) are both in the shape of a "D", an ellipse or a polygon; and / or, a positioning structure is provided between the fixed seat (61) and the cavity wall of the central cavity (113).

4. The top-inlet infrared burner according to claim 3, characterized in that, The positioning structure includes a flange (614) and a slot (1131) that engage with each other. At least one slot (1131) is provided at the lower end of the cavity wall of the central cavity (113). The flange (614) is provided at the position corresponding to the slot (1131) on the outer side wall of the fixing seat (61). The flange (614) engages with the slot (1131).

5. The top-inlet infrared burner according to claim 1, characterized in that, It also includes an ignition assembly (12) which is movably and vertically inserted through the central cavity (113) and the mounting hole (611), and is provided with a positioning rod (511) that can move between the two locking positions (612) so that the ignition assembly (12) can switch between a locked position and an unlocked position.

6. The top-inlet infrared burner according to claim 5, characterized in that, The ignition assembly (12) includes an ignition needle (51), which is movably and vertically inserted into the central cavity (113) and the mounting hole (611). The positioning rod (511) is provided at the lower end of the ignition needle (51), and the discharge part (121) is provided at the upper end of the ignition needle (51). The free end of the discharge part (121) can be moved to the radially inner side of the top of the combustion body assembly (11) or retracted to the top of the central cavity (113).

7. The top-inlet infrared burner according to claim 6, characterized in that, The ignition assembly (12) also includes an elastic element (52) and a retaining ring (53). The retaining ring (53) is located below the base body (63) and clamps the lower end of the ignition needle (51). The elastic element (52) is fitted onto the lower end of the ignition needle (51) and clamped between the retaining ring (53) and the fixing seat (61).

8. The top-inlet infrared burner according to claim 1, characterized in that, The combustion body assembly (11) also has an inner annular cavity (111), an outer annular cavity (112), an inner ejector tube (411) and an outer ejector tube (412), wherein the inner ejector tube (411) is connected to the inner annular cavity (111) and the outer ejector tube (412) is connected to the outer annular cavity (112); The base body (63) is provided with an inner ring air passage (131) and an outer ring air passage (132). The inner ring air passage (131) is connected to the inner ejector tube (411), and the outer ring air passage (132) is connected to the outer ejector tube (412).

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