A burner

Abstract

The present invention relates to the technical field of cooking appliances, and specifically discloses a burner. The burner includes a panel, a burner head, a gas distribution seat, an outer burner cap, an inner burner cap, a blower, and a preheating pot stand. The burner head is installed on the panel, the gas distribution seat is installed on the burner head, both the outer burner cap and the inner burner cap are installed on the gas distribution seat. The preheating pot stand is supported on the panel and simultaneously sleeved on the gas distribution seat and the outer burner cap. An air preheating channel is provided in the preheating pot stand. The preheating pot stand is also provided with an air inlet interface and a first air outlet interface both communicating with the air preheating channel. The output end of the blower is communicated with the air inlet interface. The first air outlet interface is used to directly supply air to the outer flame part of the flame output by the outer burner cap to improve the utilization rate of secondary air. When the fuel burns, the preheating pot stand absorbs heat through thermal radiation and can heat the passing air, which can avoid excessive reduction of the flame temperature caused by too cold air and avoid heat loss. At the same time, under the action of the blower, sufficient air supply can be guaranteed to ensure the combustion efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking stoves, and particularly to a burner. Background Art

[0002] At present, the supply of secondary air for the burner of the cooking stove in the market adopts a passive supply method. When the burner of the cooking stove burns normally, the secondary air is supplied with oxygen through the groove between the outer fire cover and the base. When the burner burns with high firepower, the air supply is insufficient, and yellow flames are likely to appear, and the thermal efficiency is not high.

[0003] In this regard, a burner is provided in the prior art. An inner ring secondary air groove and an outer ring secondary air passage connected to the output end of a blower are provided on the burner head and the burner head base. Driven by the blower, air is supplied to the inner ring fire through the inner ring secondary air groove and to the outer ring fire through the outer ring secondary air passage, so as to ensure a sufficient air supply. However, this burner has the following problems:

[0004] 1), When the burner heats the cookware, the air provided by the outer ring secondary air passage corresponds to the inner flame part of the outer ring flame, and the inner flame part requires less secondary air, resulting in low utilization rate of the secondary air;

[0005] 2), Since the temperature of the air is relatively low, when it is supplied to the inner ring fire and the outer ring fire for combustion, it is easy to cause heat loss and reduce the combustion efficiency. Summary of the Invention

[0006] The purpose of the present invention is to provide a burner to improve the utilization rate of secondary air and reduce heat loss.

[0007] The present invention provides a burner, which includes a panel, a burner head installed on the panel, a gas distribution seat installed on the burner head, an inner fire cover and an outer fire cover both installed on the gas distribution seat, and a blower. The outer fire cover is sleeved on the inner fire cover. The burner further includes a preheating pot rack supported by the panel. The preheating pot rack is simultaneously sleeved on the gas distribution seat and the outer fire cover. An air preheating channel is provided in the preheating pot rack. The preheating pot rack is further provided with an air inlet interface and a first air outlet interface both communicated with the air preheating channel. The output end of the blower is communicated with the air inlet interface, and the first air outlet interface faces the outer flame area of the flame output by the outer fire cover.

[0008] As a preferred technical solution of the burner, the preheating pot rack is further provided with a second air outlet interface communicated with the air preheating channel. The second air outlet interface is used to convey air between the inner fire cover and the outer fire cover and between the outer fire cover and the preheating pot rack.

[0009] As a preferred technical solution of the burner, the air preheating channel is spiral, the air inlet interface is located on the outer periphery of the air preheating channel, the second air outlet interface is located on the inner periphery of the air preheating channel, and the first air outlet interface is located between the outer periphery and the inner periphery of the air preheating channel.

[0010] As a preferred technical solution of the burner, a plurality of the first air outlet interfaces and a plurality of the second air outlet interfaces are provided on the preheating pot. The plurality of first air outlet interfaces are arranged in sequence along the direction of air conveyance in the air preheating channel, and the plurality of first air outlet interfaces are evenly distributed along the circumferential direction of the preheating pot; the plurality of second air outlet interfaces are arranged in sequence along the direction of air conveyance in the air preheating channel, and the plurality of second air outlet interfaces are evenly distributed along the circumferential direction of the preheating pot.

[0011] As a preferred technical solution of the burner, along the direction of air conveyance in the air preheating channel, the apertures of the plurality of first air outlet interfaces gradually increase, and the apertures of the plurality of second air outlet interfaces gradually increase.

[0012] As a preferred technical solution of the burner, the air preheating channel includes a first preheating channel and a second preheating channel. The air inlet interface is respectively communicated with the first preheating channel and the second preheating channel. The first air outlet interface is communicated with the first preheating channel, and the second air outlet interface is communicated with the second preheating channel.

[0013] As a preferred technical solution of the burner, the burner further includes a damper rotatably connected to the preheating pot. The damper is located between the first preheating channel and the second preheating channel. The preheating pot is provided with an opening communicating the first preheating channel and the second preheating channel;

[0014] The first preheating channel includes a first section located upstream of the opening and a second section located downstream of the opening. The second preheating channel includes a third section located upstream of the opening and a fourth section located downstream of the opening. The first air outlet interface is communicated with the second section, and the second air outlet interface is communicated with the fourth section; the damper can rotate relative to the preheating pot to have a first position, a second position, and a third position. When the damper is in the first position, the damper closes the opening. When the damper is in the second position, the damper is located between the opening and the second section; when the damper is in the third position, the damper is located between the opening and the fourth section.

[0015] As a preferred technical solution of the burner, the preheating pot rack includes a preheating plate, a pot rack disposed above the preheating plate, and a support ring connected to the bottom of the preheating plate. The pot rack is used to support cookware. The air preheating channel, the air inlet interface, the first air outlet interface, and the second air outlet interface are all disposed on the preheating plate.

[0016] The burner further includes a water receiving tray sleeved on the burner head. The water receiving tray is connected to the burner head and supported by the panel. The support ring is hermetically attached to the upper surface of the water receiving tray.

[0017] As a preferred technical solution of the burner, the burner further includes an air delivery channel. The air delivery channel includes a first channel disposed between the air distribution base and the water receiving tray, a second channel disposed in the air distribution base, and a third channel disposed between the inner fire cover and the outer fire cover. The first channel, the second channel, and the third channel are sequentially connected. The second air outlet interface faces the first channel.

[0018] As a preferred technical solution of the burner, the air delivery channel further includes a fourth channel disposed between the air distribution base and the preheating pot rack, and a fifth channel disposed between the outer fire cover and the preheating pot rack. The fourth channel and the fifth channel are connected, and the fourth channel can be connected to the first channel.

[0019] The beneficial effects of the present invention are as follows:

[0020] The present invention provides a burner. An air preheating channel is provided in the preheating pot rack of the burner. The preheating pot rack is further provided with an air inlet interface and a first air outlet interface both connected to the air preheating channel. The output end of the blower is connected to the air inlet interface. The first air outlet interface is used to directly supply air to the outer flame part of the flame output by the outer fire cover to improve the utilization rate of secondary air. When the fuel output by the outer fire cover and the inner fire cover burns, under the action of thermal radiation, the preheating pot rack will have a relatively high temperature. When the blower delivers air to the air preheating channel of the preheating pot rack, the air exchanges heat with the preheating pot rack and increases in temperature. Thus, when the air is delivered to the outer flame part of the flame output by the outer fire cover, the flame temperature can be prevented from decreasing and heat loss can be avoided. At the same time, under the action of the blower, sufficient air supply can be ensured to promote the full combustion of the fuel and improve the combustion efficiency of the fuel.

[0021] The present invention provides a burner. An air preheating channel is arranged in the preheating pot rack of the burner. The preheating pot rack is further provided with an air inlet interface and an air outlet interface which are both communicated with the air preheating channel. The output end of the blower is communicated with the air inlet interface, and the air outlet interface is used to supply air to the fuel output by the burner head assembly. When the fuel output by the burner head assembly burns, under the action of thermal radiation, the preheating pot rack will have a relatively high temperature. When the blower conveys air to the air preheating channel of the preheating pot rack, the air exchanges heat with the preheating pot rack to increase the temperature. Thus, when the air is conveyed to the burner head assembly, the flame temperature can be prevented from decreasing excessively, and heat loss can be avoided. At the same time, under the action of the blower, sufficient air supply can be ensured to promote full combustion of the fuel, so as to improve the combustion efficiency of the fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a top view of the burner in an embodiment of the present invention;

[0023] Figure 2 is an axonometric view of the burner in an embodiment of the present invention;

[0024] Figure 3 is an exploded view of the burner in an embodiment of the present invention;

[0025] Figure 4 is Figure 1 a cross-sectional view of the burner along the A-A direction in

[0026] Figure 5 is Figure 1 a cross-sectional view of the burner along the B-B direction in

[0027] Figure 6 is a schematic diagram of the burner supporting a cookware in an embodiment of the present invention;

[0028] Figure 7 is a partial view of the burner in an embodiment of the present invention Figure 1 ;

[0029] Figure 8 is a partial view of the burner in an embodiment of the present invention Figure 2 ;

[0030] Figure 9 is a partial structural schematic diagram of the preheating plate in the burner in an embodiment of the present invention;

[0031] Figure 10 is a cross-sectional view of the preheating plate in the burner in an embodiment of the present invention;

[0032] Figure 11 is a schematic diagram of the air preheating channel laid flat along its profile line in an embodiment of the present invention.

[0033] In the figure:

[0034] 1. Panel; 11. Through-hole;

[0035] 2. Burner head;

[0036] 3. Gas distribution base;

[0037] 41. Inner fire cover; 42. Outer fire cover;

[0038] 5. Blower;

[0039] 6. Preheating pot stand; 61. Preheating plate; 611. Housing; 612. Spiral partition; 613. Positioning protrusion; 62. Pot stand; 621. Base; 622. Leg; 623. Positioning groove; 63. Support ring; 64. Air preheating channel; 641. First preheating channel; 642. First section; 643. Second section; 644. Second preheating channel; 645. Third section; 646. Fourth section; 65. Air inlet interface; 661. First air outlet interface; 662. Second air outlet interface; 67. Opening; 68. Semi-closed space; 69. Air damper;

[0040] 7. Water receiving tray;

[0041] 81. First channel; 82. Second channel; 83. Third channel; 84. Fourth channel; 85. Fifth channel;

[0042] 9. Cookware;

[0043] 10. Nozzle. Detailed implementation manners

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0046] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0048] In the prior art burner, driven by a blower, air is supplied to the inner-ring fire for combustion through the inner-ring secondary air groove, and to the outer-ring fire for combustion through the outer-ring secondary air channel. Although the blower can provide sufficient air, since the temperature of the air is relatively low, when supplied to the inner-ring fire and the outer-ring fire for combustion, the relatively cold air will absorb part of the heat, resulting in large heat loss and low combustion efficiency.

[0049] In view of this, the present embodiment provides a burner, which can reduce heat loss and significantly improve combustion efficiency on the premise of ensuring sufficient supply of secondary air.

[0050] Figure 1 is a top view of the burner in the embodiment of the present invention; Figure 2 is an axonometric view of the burner in the embodiment of the present invention;Figure 3 Exploded view of the burner in the embodiment of the present invention; Figure 4 is Figure 1 Cross-sectional view of the burner along the A-A direction in; Figure 5 is Figure 1 Cross-sectional view of the burner along the B-B direction in; Figure 6 Schematic diagram of the burner supporting the cookware 9 in the embodiment of the present invention. Specifically, as Figures 1 to 6 shown, the burner includes a panel 1, a burner head 2, a gas distribution seat 3, an inner fire cap 41, an outer fire cap 42, a blower 5 and a preheating pot rack 6. Among them, the burner head 2 is installed on the panel 1, the gas distribution seat 3 is installed on the burner head 2, the inner fire cap 41 and the outer fire cap 42 are installed on the gas distribution seat 3, and the outer fire cap 42 is sleeved on the inner fire cap 41. The fuel conveyed by the burner head 2 can be distributed to the inner fire cap 41 and the outer fire cap 42 through the gas distribution seat 3 and can be output through the inner fire cap 41 and the outer fire cap 42. The preheating pot rack 6 is supported on the panel 1 and simultaneously sleeved on the gas distribution seat 3 and the outer fire cap 42. The preheating pot rack 6 can be used to support the cookware 9. An air preheating channel 64 is provided in the preheating pot rack 6. The preheating pot rack 6 is further provided with an air inlet interface 65 and a first air outlet interface 661 that are both communicated with the air preheating channel 64. The output end of the blower 5 is communicated with the air inlet interface 65. The first air outlet interface 661 faces the outer flame area of the flame output by the outer fire cap 42, and the air output by the first air outlet interface 661 is used for the outer flame part of the flame output by the outer fire cap 42.

[0051] Among them, the fuel conveyed by the burner head 2 has been mixed with primary air. In this embodiment, the air provided by the blower 5 is secondary air. It can be understood that the flame includes an inner flame and an outer flame, and the amount of air required for the outer flame part is relatively large. The primary air mixed in the fuel can already meet the requirements of the inner flame part. Secondary air is supplied to the outer flame part of the flame output by the outer fire cap 42 through the first air outlet interface 661 to improve the utilization rate of air; at the same time, when the fuel output by the outer fire cap 42 and the inner fire cap 41 burns, under the action of thermal radiation, the preheating pot rack 6 will have a relatively high temperature. When the blower 5 conveys air to the air preheating channel 64 of the preheating pot rack 6, the air exchanges heat with the preheating pot rack 6 and the temperature is increased, so that the flame temperature can be prevented from dropping excessively when the air is conveyed to the outer flame part of the flame output by the outer fire cap 42; in addition, under the action of the blower 5, sufficient air supply can be ensured to promote the full combustion of the fuel and improve the combustion efficiency of the fuel.

[0052] Optionally, as Figure 5 and Figure 6As shown, the preheating pot stand 6 is further provided with a second air outlet interface 662 communicated with the air preheating channel 64. The second air outlet interface 662 is used to convey air between the inner fire cap 41 and the outer fire cap 42 and between the outer fire cap 42 and the preheating pot stand 6. Among them, the air conveyed between the inner fire cap 41 and the outer fire cap 42 can supply the combustion of the flames output by both the inner fire cap 41 and the outer fire cap 42, and the air conveyed between the outer fire cap 42 and the preheating pot stand 6 can supply the combustion of the flame output by the outer fire cap 42. With such a setting, the utilization rate of fuel can be further improved.

[0053] Optionally, as Figure 3 and Figure 4 shown, in this embodiment, the blower 5 is arranged below the panel 1. The panel 1 is provided with a through hole 11. The air inlet interface 65 passes through the through hole 11 and is located below the panel 1, so that the overall beauty of the burner can be ensured. As an alternative solution, the blower 5 can also be supported above the panel 1.

[0054] Figure 7 Structural schematic diagrams of the preheating plate 61, the air distribution seat 3, the inner fire cap 41 and the outer fire cap 42 in the burner according to the embodiment of the present invention Figure 1 ; Figure 8 Structural schematic diagrams of the preheating plate 61, the air distribution seat 3, the inner fire cap 41 and the outer fire cap 42 in the burner according to the embodiment of the present invention Figure 2 ; Figure 9 Partial structural schematic diagram of the preheating plate 61 in the burner according to the embodiment of the present invention; Figure 10 Cross-sectional view of the preheating plate 61 in the burner according to the embodiment of the present invention. Optionally, please refer to Figures 7 to 10, the preheating pot rack 6 includes a preheating plate 61 and a pot rack 62 disposed above the preheating plate 61. The pot rack 62 is used to support the cookware 9. The air preheating channel 64, the air inlet interface 65 and the air outlet interface are all disposed on the preheating plate 61. Specifically, the pot rack 62 includes a base 621 and a plurality of supporting feet 622 supported on the base 621. The plurality of supporting feet 622 are evenly distributed along the circumferential direction of the pot rack 62. Among them, in this embodiment, a scheme with four supporting feet 622 is exemplarily given. In other embodiments, the number of the supporting feet 622 can also be set to other numbers according to needs. In this embodiment, when the fuel burns, the supporting feet 622 are within the range of the flame and can directly absorb heat and transfer it to the base 621. In addition, a part of the heat generated by the fuel combustion is also absorbed by the base 621 through thermal radiation. The base 621 can transfer the absorbed heat to the preheating plate 61 below, and the preheating plate 61 heats the air flowing through the air preheating channel 64. Preferably, the upper surface of the preheating plate 61 is in contact with the lower surface of the base 621 to ensure good heat transfer effect between the preheating plate 61 and the base 621. Further preferably, both the base 621 and the preheating plate 61 are concave disc-shaped structures. Such a setting can make the preheating pot rack 6 have a larger heat receiving area to improve the heating effect on the air in the air preheating channel 64. Further preferably, the preheating plate 61 is provided with an annular positioning protrusion 613, and the base 621 is provided with an annular positioning groove 623. The positioning protrusion 613 and the positioning groove 623 are inserted to ensure the relative position of the pot rack 62 and the preheating plate 61 is stable, and further ensure that the base 621 and the preheating plate 61 can be stably attached together.

[0055] Optionally, please refer to Figures 3 to 6 , the burner further includes a water receiving tray 7 sleeved on the burner head 2. The water receiving tray 7 is connected to the burner head 2 and is supported on the panel 1. The preheating pot rack 6 further includes a support ring 63 connected to the bottom of the preheating plate 61. The support ring 63 is in sealed contact with the upper surface of the water receiving tray 7. Among them, the water receiving tray 7 and the burner head 2 are connected by screwing. The outer edge of the water receiving tray 7 can be placed on the panel 1, and the panel 1 and the burner head 2 can support the water receiving tray 7. The preheating pot rack 6 is supported on the water receiving tray 7 through the support ring 63. When there is soup, water or sundries falling above the preheating pot rack 6, they can only fall onto the water receiving tray 7, which can prevent them from falling onto the panel 1. Among them, the support ring 63 and the preheating plate 61 can be integrally provided or detachably connected. As an alternative solution, the support ring 63 can also be in sealed contact with the panel 1.

[0056] This embodiment provides that the support ring 63 is sealed with the water receiving tray 7, the support ring 63 is sealed with the preheating tray 61, a semi-enclosed space 68 is enclosed between the water receiving tray 7, the support ring 63 and the preheating tray 61, the second air outlet interface 662 is connected to the semi-enclosed space 68, and the semi-enclosed space 68 only allows air to be transported to one side of the fire cover assembly, thereby preventing the air from returning to the external atmosphere along the side away from the fire cover assembly, ensuring that the air output by the second air outlet interface 662 can be fully supplied to the fuel output by the fire cover assembly for combustion. Optionally, the second air outlet interface 662 is installed with a nozzle 10.

[0057] Optionally, see Figure 5 , Figure 6 , Figure 9 and Figure 10 The air preheating channel 64 is spiral-shaped, the air inlet interface 65 is connected to the outer periphery of the air preheating channel 64, the second air outlet interface 662 is connected to the inner periphery of the air preheating channel 64, and the first air outlet interface 661 is connected between the inner periphery and the outer periphery of the air preheating channel 64. Specifically, the preheating disk 61 includes a shell 611 and a spiral partition 612, wherein the shell 611 has a accommodating cavity, the air inlet interface 65, the first air outlet interface 661 and the second air outlet interface 662 are all arranged in the shell 611, the spiral partition 612 is located in the accommodating cavity, and the upper and lower sides of the spiral partition 612 are connected to the cavity wall of the accommodating cavity, thereby forming a spiral air preheating channel 64, when the air enters the air preheating channel 64 from the air inlet interface 65, it will move along the circumferential direction of the preheating disk 61 for multiple circles to reach the second air outlet interface 662, the air has a long moving path in the air preheating channel 64, can effectively exchange heat with the preheating disk 61, and ensure that the air has a higher temperature after being output from the second air outlet interface 662. Among them, the shell 611 and the spiral partition 612 can be arranged in one piece.

[0058] Optionally, the preheating pot stand 6 is provided with a plurality of first air outlet interfaces 661; the plurality of first air outlet interfaces 661 are arranged in sequence along the direction of air conveyance in the air preheating channel 64, and the plurality of first air outlet interfaces 661 are evenly distributed along the circumferential direction of the preheating pot stand 6. With such an arrangement, it can ensure that secondary air is evenly supplied to the outer flame region of the flame output by the outer burner cap 42; the preheating pot stand 6 is further provided with a plurality of second air outlet interfaces 662, the plurality of second air outlet interfaces 662 are arranged in sequence along the direction of air conveyance in the air preheating channel 64, and the plurality of second air outlet interfaces 662 are evenly distributed along the circumferential direction of the preheating pot stand 6. With such an arrangement, it can ensure that air is evenly supplied to the flame output by the inner burner cap 41 and the flame output by the outer burner cap 42 simultaneously. Preferably, along the direction of air conveyance in the air preheating channel 64, the apertures of the plurality of first air outlet interfaces 661 gradually increase, and the apertures of the plurality of second air outlet interfaces 662 gradually increase. Taking the first air outlet interface 661 as an example, it can be understood that as air gradually passes through the plurality of first air outlet interfaces 661, the air pressure will gradually decrease. If the apertures of all the first air outlet interfaces 661 are the same, it will result in a gradual decrease in the air flow rate output by the plurality of first air outlet interfaces 661 along the direction of air conveyance in the air preheating channel 64. In this regard, by gradually increasing the apertures of the plurality of first air outlet interfaces 661 along the direction of air conveyance in the air preheating channel 64, it can ensure that the air flow rates output by each of the first air outlet interfaces 661 tend to be balanced.

[0059] Figure 11 FIG. is a schematic diagram of the air preheating channel 64 laid flat along its profile line in the embodiment of the present invention. Optionally, as Figure 11 shown, the air preheating channel 64 includes a first preheating channel 641 and a second preheating channel 644. The air inlet interface 65 is respectively communicated with the first preheating channel 641 and the second preheating channel 644. The first air outlet interface 661 is communicated with the first preheating channel 641, and the second air outlet interface 662 is communicated with the second preheating channel 644. Specifically, the first preheating channel 641 is located above the second preheating channel 644. With such an arrangement, it can ensure that the initial air pressure supplied to the first air outlet interface 661 and the initial air pressure supplied to the second air outlet interface 662 are the same, ensuring the air supply effect. In other embodiments, the first preheating channel 641 and the second preheating channel 644 can also be combined into the same preheating channel.

[0060] Optionally, please continue to refer to Figure 11, the burner further includes a damper 69 rotatably connected to the preheating pot rack 6. The damper 69 is located between the first preheating passage 641 and the second preheating passage 644. The preheating pot rack 6 is provided with an opening 67 communicating the first preheating passage 641 and the second preheating passage 644; the first preheating passage 641 includes a first section 642 upstream of the opening 67 and a second section 643 downstream of the opening 67, and the second preheating passage 644 includes a third section 645 upstream of the opening 67 and a fourth section 646 downstream of the opening 67. The first air outlet interface 661 communicates with the second section 643, and the second air outlet interface 662 communicates with the fourth section 646; the damper 69 can rotate relative to the preheating pot rack 6 to have a first position, a second position and a third position. When the damper 69 is in the first position, as shown in FIG. A of Figure 11 , the damper 69 closes the opening 67. When the damper 69 is in the second position, as shown in FIG. B of Figure 11 , the damper 69 is located between the opening 67 and the second section 643; when the damper 69 is in the third position, as shown in FIG. C of Figure 11 , the damper 69 is located between the opening 67 and the fourth section 646. When the damper 69 is in the first position, the damper 69 can completely separate the first preheating passage 641 and the second preheating passage 644. At this time, the first preheating passage 641 and the second preheating passage 644 are not communicated. The air in the first preheating passage 641 is only output from the first air outlet interface 661, and the air in the second preheating passage 644 is only output from the second air outlet interface 662; when the damper 69 is in the second position, the damper 69 opens the opening 67, and the damper 69 can adjust the opening degree of the second section 643. Specifically, the opening degree of the second section 643 can be greater than or equal to 0 and less than 100%. At this time, a part or all of the air in the first preheating passage 641 enters the second preheating passage 644 from the opening 67, and the air output from the first air outlet interface 661 can be reduced or closed and the air output from the second air outlet interface 662 can be increased; when the damper 69 is in the third position, the damper 69 opens the opening 67, and the damper 69 can adjust the opening degree of the fourth section 646. Specifically, the opening degree of the fourth section 646 can be greater than or equal to 0 and less than 100%. At this time, a part or all of the air in the second preheating passage 644 enters the first preheating passage 641 from the opening 67, and the air output from the second air outlet interface 662 can be reduced or closed and the air output from the first air outlet interface 661 can be increased. Among them, the damper 69 can be driven by a motor to rotate between the first position - the second position - the third position.

[0061] As an alternative solution, the air preheating passage 64 may further include a main passage and a plurality of sub-passages. The plurality of sub-passages are all communicated with the main passage. The air inlet interface 65 communicates with the main passage. The plurality of first air outlet interfaces 661 are in one-to-one correspondence and communication with the plurality of sub-passages, and the plurality of second air outlet interfaces 662 are in one-to-one correspondence and communication with the plurality of sub-passages.

[0062] The burner further includes an air delivery channel. The air delivery channel includes a first channel 81 disposed between the air distribution base 3 and the water receiving tray 7, a second channel 82 disposed in the air distribution base 3, and a third channel 83 disposed between the inner fire cap 41 and the outer fire cap 42. The first channel 81, the second channel 82, and the third channel 83 are connected in sequence. The second air outlet interface 662 faces the first channel 81, and the second air outlet interface 662 is used to deliver air to the first channel 81. Specifically, the semi-closed space 68 is connected to the first channel 81. After the air output from the second air outlet interface 662 enters the semi-closed space 68, it is sequentially supplied to the fuel output from the inner fire cap 41 and the outer fire cap 42 through the first channel 81, the second channel 82, and the third channel 83 for combustion, ensuring the combustion efficiency.

[0063] Optionally, the air delivery channel further includes a fourth channel 84 disposed between the air distribution base 3 and the preheating pot stand 6, and a fifth channel 85 disposed between the outer fire cap 42 and the preheating pot stand 6. The fourth channel 84 and the fifth channel 85 are connected, and the fourth channel 84 can be connected to the first channel 81. Specifically, the fourth channel 84 is connected to the first channel 81 through the semi-closed space 68. Since the outer fire cap 42 outputs more fuel than the inner fire cap 41, with such a setting, a part of the air can also be separately supplied to the outer fire cap 42 through the fourth channel 84 and the fifth channel 85, ensuring sufficient air for the fuel output by the outer fire cap 42, and thus ensuring the combustion efficiency.

[0064] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A burner, comprising a panel (1), a burner head (2) installed on the panel (1), a gas distribution base (3) installed on the burner head (2), an inner burner cap (41) and an outer burner cap (42) both installed on the gas distribution base (3), and a blower (5), wherein the outer burner cap (42) is sleeved on the inner burner cap (41), and is characterized in that, The burner further includes a preheating pot stand (6) supported on the panel (1). The preheating pot stand (6) is simultaneously sleeved on the gas distribution seat (3) and the outer burner cap (42). An air preheating channel (64) is provided in the preheating pot stand (6). The preheating pot stand (6) is further provided with an air inlet interface (65) and a first air outlet interface (661) both communicating with the air preheating channel (64). The output end of the blower (5) is communicated with the air inlet interface (65), and the first air outlet interface (661) faces the outer flame area of the flame output by the outer burner cap (42).

2. The burner according to claim 1, characterized in that, The preheating pot stand (6) is further provided with a second air outlet interface (662) communicating with the air preheating channel (64). The second air outlet interface (662) is used for delivering air between the inner burner cap (41) and the outer burner cap (42) and between the outer burner cap (42) and the preheating pot stand (6).

3. The burner according to claim 2, characterized in that, The air preheating channel (64) is spiral. The air inlet interface (65) is located on the outer periphery of the air preheating channel (64), the second air outlet interface (662) is located on the inner periphery of the air preheating channel (64), and the first air outlet interface (661) is located between the outer periphery and the inner periphery of the air preheating channel (64).

4. The burner according to claim 2, characterized in that, The preheating pot stand (6) is provided with a plurality of the first air outlet interfaces (661) and a plurality of the second air outlet interfaces (662). The plurality of the first air outlet interfaces (661) are arranged in sequence along the direction of air delivery in the air preheating channel (64), and the plurality of the first air outlet interfaces (661) are evenly distributed along the circumferential direction of the preheating pot stand (6); the plurality of the second air outlet interfaces (662) are arranged in sequence along the direction of air delivery in the air preheating channel (64), and the plurality of the second air outlet interfaces (662) are evenly distributed along the circumferential direction of the preheating pot stand (6).

5. The burner according to claim 2, characterized in that, Along the direction of air delivery in the air preheating channel (64), the apertures of the plurality of the first air outlet interfaces (661) gradually increase, and the apertures of the plurality of the second air outlet interfaces (662) gradually increase.

6. The burner according to claim 2, characterized in that, The air preheating channel (64) includes a first preheating channel (641) and a second preheating channel (644). The air inlet interface (65) communicates with the first preheating channel (641) and the second preheating channel (644) respectively. The first air outlet interface (661) communicates with the first preheating channel (641), and the second air outlet interface (662) communicates with the second preheating channel (644).

7. The burner according to claim 6, characterized in that, The burner further includes a damper (69) rotatably connected to the preheating pot stand (6). The damper (69) is located between the first preheating channel (641) and the second preheating channel (644). The preheating pot stand (6) is provided with an opening (67) communicating the first preheating channel (641) and the second preheating channel (644); The first preheating channel (641) includes a first section (642) located upstream of the opening (67) and a second section (643) located downstream of the opening (67). The second preheating channel (644) includes a third section (645) located upstream of the opening (67) and a fourth section (646) located downstream of the opening (67). The first air outlet interface (661) communicates with the second section (643), and the second air outlet interface (662) communicates with the fourth section (646). The air damper (69) can rotate relative to the preheating pot stand (6) and has a first position, a second position, and a third position. When the air damper (69) is in the first position, the air damper (69) closes the opening (67). When the air damper (69) is in the second position, the air damper (69) is located between the opening (67) and the second section (643). When the air damper (69) is in the third position, the air damper (69) is located between the opening (67) and the fourth section (646).

8. The burner according to any one of claims 2-7, characterized in that, The preheating pot stand (6) includes a preheating plate (61), a pot stand (62) disposed above the preheating plate (61), and a support ring (63) connected to the bottom of the preheating plate (61). The pot stand (62) is used to support the cookware (9). The air preheating channel (64), the air inlet interface (65), the first air outlet interface (661), and the second air outlet interface (662) are all disposed on the preheating plate (61). The burner further includes a water receiving tray (7) sleeved on the burner head (2). The water receiving tray (7) is connected to the burner head (2), and the water receiving tray (7) is supported on the panel (1). The support ring (63) is hermetically attached to the upper surface of the water receiving tray (7).

9. The burner according to claim 8, characterized in that, The burner further includes an air delivery channel. The air delivery channel includes a first channel (81) disposed between the air distribution base (3) and the water receiving tray (7), a second channel (82) disposed in the air distribution base (3), and a third channel (83) disposed between the inner burner cap (41) and the outer burner cap (42). The first channel (81), the second channel (82), and the third channel (83) are sequentially connected. The second air outlet interface (662) faces the first channel (81).

10. The burner according to claim 9, characterized in that, The air delivery channel further includes a fourth channel (84) disposed between the air distribution base (3) and the preheating pot stand (6), and a fifth channel (85) disposed between the outer burner cap (42) and the preheating pot stand (6). The fourth channel (84) and the fifth channel (85) are connected, and the fourth channel (84) can communicate with the first channel (81).

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