Rotary spraying type furnace end and stove

Abstract

The rotary spraying type furnace end comprises a burner body, a first fire cover and a first air inlet pipe, the burner body is provided with an annular air cavity with an opening in the upper side, and the first fire cover is arranged on the upper side of the burner body and corresponds to the opening of the annular air cavity. The first air inlet pipe is connected to the burner body and provided with a first air inlet channel communicated with the annular air cavity, the bottom wall of the annular air cavity is of a spiral structure surrounding the middle of the burner body, the bottom wall of the annular air cavity is correspondingly provided with a guide groove of a spiral structure, and the end of the guide groove is in butt joint with the first air inlet channel. By means of the structure, reduction of air noise and conveying pressure loss of gas in the annular gas cavity is facilitated, pressure change of output gas is reduced, the gas has good and stable output pressure, the good combustion effect can be obtained, and cooking and heating are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, and particularly relates to a rotary jet burner head and a cooking appliance. Background Art

[0002] The gas burner head is an important part of a gas cooking appliance. In the existing gas burner head, an air inlet pipe for inputting gas is connected to a burner main body. A gas cavity is arranged in the burner main body, and a channel in the air inlet pipe communicates with the gas cavity to convey gas into the gas cavity. After the gas enters the gas cavity, it is output through a fire hole above the gas cavity for combustion to heat a utensil above. The existing air inlet structure of the burner head is relatively simple. The gas output from the air inlet channel to the gas cavity usually directly collides with the cavity wall of the gas cavity, forming wind noise and generating a certain pressure loss, which will affect the pressure condition of the gas output from the fire hole, and the structure needs to be improved. Content of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a rotary jet burner head. By arranging a spiral guiding groove and a first air inlet channel, the gas input into an annular gas cavity from the first air inlet channel can be conveyed spirally along the guiding groove. The gas flow is smoother, the resistance is relatively small, which is beneficial to reducing wind noise and pressure loss and is convenient for use.

[0004] The utility model also provides a cooking appliance with the rotary jet burner head.

[0005] The rotary jet burner head according to the first aspect embodiment of the utility model includes a burner main body, a first burner cap and a first air inlet pipe. The burner main body is provided with an annular gas cavity with an upper opening. The first burner cap is arranged on the upper side of the burner main body and corresponds to the opening of the annular gas cavity. The first air inlet pipe is connected to the burner main body and is provided with a first air inlet channel communicating with the annular gas cavity. The bottom wall of the annular gas cavity is a spiral structure around the middle part of the burner main body, and the bottom wall of the annular gas cavity is correspondingly provided with a spiral guiding groove. The end of the guiding groove is butted against the first air inlet channel.

[0006] According to the jet - type burner head described in the embodiments of the present utility model, it has at least the following beneficial effects: During use, gas is input through the first gas inlet channel of the first gas inlet pipe, and the gas output from the first gas inlet channel enters the annular gas cavity of the burner main body. Since the guiding groove is connected to the first gas inlet channel, the bottom wall of the annular gas cavity and the guiding groove are in a spiral structure. The gas input into the annular gas cavity will be spirally transported along the guiding groove. During the transportation process, part of the gas will move upward and diffuse and be output for combustion through the fire holes on the burner cap or the fire holes between the burner cap and the burner main body. The spiral structure of the bottom wall of the annular gas cavity makes the ventilation cross - sectional area of the annular gas cavity gradually decrease along the gas transportation direction to adapt to the gradual reduction of gas during the transportation in the annular gas cavity, reducing the pressure change of the output gas. Moreover, the gas output from the first gas inlet channel is guided by the guiding groove with a spiral structure, making the turning angle of the gas relatively gentle, the bending radius relatively large, and the gas flow direction gradually turn. Therefore, the gas flow is smoother, the resistance is relatively small, which is beneficial to reducing wind noise and pressure loss, enabling the gas to have a better and more stable output pressure and facilitating use.

[0007] According to some embodiments of the present utility model, the width of the upper slot opening of the guiding groove gradually decreases along the gas transportation direction.

[0008] According to some embodiments of the present utility model, the depth of the slot body of the guiding groove gradually decreases along the gas transportation direction.

[0009] According to some embodiments of the present utility model, the cross - section of the slot wall of the guiding groove is an arc - shaped structure.

[0010] According to some embodiments of the present utility model, middle - ring fire holes and outer - ring fire holes are defined between the first burner cap and the burner main body. The middle - ring fire holes are located inside the ring of the annular gas cavity and are communicated with the annular gas cavity. The outer - ring fire holes are located outside the ring of the annular gas cavity and are communicated with the annular gas cavity. The first burner cap is provided with a pilot - fire groove, and both ends of the pilot - fire groove are respectively communicated with the middle - ring fire holes and the outer - ring fire holes.

[0011] According to some embodiments of the present utility model, the jet - type burner head further includes a second burner cap and a second gas inlet pipe. A central gas cavity with an upper - side opening is provided in the middle of the burner main body. The second burner cap is arranged on the upper side of the burner main body corresponding to the opening of the central gas cavity. Inner - ring fire holes are defined between the second burner cap and the burner main body, and the inner - ring fire holes are communicated with the central gas cavity. The second gas inlet pipe is connected to the burner main body and is provided with a second gas inlet channel communicated with the central gas cavity.

[0012] According to some embodiments of the present utility model, a gas nozzle for delivering gas to the second air intake passage is connected to the end of the second air intake pipe, and an injection hole communicating the external atmosphere with the second air intake passage is provided on the pipe wall of the second air intake pipe.

[0013] According to some embodiments of the present utility model, shielding portions for blocking foreign objects from entering are provided at the outlets of the inner ring flame holes, the middle ring flame holes, and the outer ring flame holes.

[0014] According to some embodiments of the present utility model, convex ribs are provided on both sides of the ignition groove in the width direction.

[0015] The cooking stove according to the second aspect embodiment of the present utility model includes a swirl injection burner head according to the first aspect embodiment of the present utility model above.

[0016] The cooking stove according to the embodiment of the present utility model has at least the following beneficial effects: By adopting the above-mentioned swirl injection burner head, it is beneficial to reduce the wind noise and the conveying pressure loss of the gas in the annular gas cavity, and can reduce the pressure change of the output gas, so that the gas has a better and more stable output pressure, which is beneficial to obtaining a better combustion effect and is convenient for the cooking and heating use of the cooking stove.

[0017] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a schematic structural diagram of a swirl injection burner head according to an embodiment of the present utility model;

[0020] Figure 2 is Figure 1 a schematic structural diagram of another perspective of the swirl injection burner head in

[0021] Figure 3 is Figure 1 a schematic cross-sectional structural diagram of the swirl injection burner head in

[0022] Figure 4 is Figure 1 a schematic partial structural diagram of the swirl injection burner head in

[0023] Reference numerals:

[0024] Burner main body 100, annular gas cavity 101, guiding groove 102, central gas cavity 103, ignition needle 110, thermocouple 120;

[0025] The first intake pipe 210, the first intake passage 211, the second intake pipe 220, the second intake passage 221, the injection hole 222, the gas nozzle 230, the adjusting spring 240;

[0026] The outer ring flame holes 301, the middle ring flame holes 302, the inner ring flame holes 303, the first burner cap 310, the ignition groove 311, the rib 312, the second burner cap 320, the shielding portion 321. Specific embodiments

[0027] 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 denote the same or similar elements or elements having 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 of the present invention.

[0028] In the description of the present invention, it should be understood that if the orientation description is involved, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, which 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 of the present invention.

[0029] In the description of the present invention, if words such as several, greater than, less than, exceeding, above, below, within, etc. appear, where the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number.

[0030] If the first and second are described only for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, words such as set, install, connect, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0032] Refer to Figure 1 , Figure 2 , Figure 3 and Figure 4, A rotary jet burner head, which includes a burner body 100, a first burner cap 310, and a first air inlet pipe 210. The burner body 100 is provided with an annular air cavity 101 with an upper opening. The first burner cap 310 is arranged on the upper side of the burner body 100 and corresponds to the opening of the annular air cavity 101. The first air inlet pipe 210 is connected to the burner body 100 and is provided with a first air inlet passage 211 communicating with the annular air cavity 101. The bottom wall of the annular air cavity 101 is a spiral structure around the middle of the burner body 100, and a spiral guiding groove 102 is correspondingly arranged on the bottom wall of the annular air cavity 101. The end of the guiding groove 102 is docked with the first air inlet passage 211.

[0033] It can be understood that, as Figure 2 , Figure 3 and Figure 4 shown, the bottom wall of the annular air cavity 101 is a spiral structure around the middle of the burner body 100, a spiral guiding groove 102 is correspondingly arranged on the bottom wall of the annular air cavity 101, and the outlet end of the first air inlet passage 211 is docked with the end of the guiding groove 102. During use, the gas is input from the first air inlet passage 211 of the first air inlet pipe 210, and the gas output from the first air inlet passage 211 enters the annular air cavity 101 of the burner body 100. Since the guiding groove 102 is docked with the first air inlet passage 211 and the bottom wall of the annular air cavity 101 and the guiding groove 102 are spiral structures, the gas input into the annular air cavity 101 will be spirally conveyed along the guiding groove 102. During the conveying process, part of the gas will move upward and diffuse and be output for combustion through the fire holes on the burner cap or the fire holes between the burner cap and the burner body 100. The spiral structure of the bottom wall of the annular air cavity 101 makes the ventilation cross-sectional area of the annular air cavity 101 gradually decrease along the gas conveying direction to adapt to the gradual reduction of the gas during the conveying process in the annular air cavity 101, reduce the pressure change of the output gas, and the gas output from the first air inlet passage 211 is guided by the spiral guiding groove 102, so that the turning angle of the gas is relatively gentle, the bending radius is relatively large, the flow direction of the gas gradually turns, so the gas flow is smoother, the resistance is relatively small, which is beneficial to reducing wind noise and pressure loss, making the gas have a better and more stable output pressure and being convenient for use.

[0034] In some embodiments, the width of the upper slot opening of the guiding groove 102 gradually decreases along the gas conveying direction. It can be understood that, as Figure 2 , Figure 3 and Figure 4 shown, the guiding groove 102 takes the end close to the first air inlet passage 211 as the leading end and the other end as the trailing end. The width of the upper slot opening at its leading end is wider, while the width of the upper slot opening at the trailing end is narrower. The slot opening width gradually decreases along the gas conveying direction to adapt to the gradual reduction of the gas during the conveying process in the guiding groove 102, which is beneficial to reducing the pressure change of the output gas.

[0035] In some embodiments, the groove depth of the guiding groove 102 gradually decreases along the gas delivery direction. It can be understood that, as shown in Figure 2 , Figure 3 and Figure 4 , the groove depth at the head end of the guiding groove 102 is relatively deep, and the groove depth at its tail end is relatively shallow. The groove depth gradually decreases along the gas delivery direction, which is also to adapt to the gradual reduction of gas during the delivery process in the guiding groove 102, and is beneficial to reducing the pressure change of the output gas.

[0036] Specifically, the cross-section of the groove wall of the guiding groove 102 is an arc-shaped structure. It can be understood that, as shown in Figure 2 , Figure 3 and Figure 4 , the cross-section of the groove wall of the guiding groove 102 is circular arc-shaped, and the radius corresponding to the circular arc gradually decreases along the gas delivery direction, so that the width of the upper groove opening and the groove depth decrease along the gas delivery direction, adapting to the gradual reduction of gas during the delivery process in the guiding groove 102. Moreover, compared with a flat wall surface, the arc-shaped wall surface is beneficial to reducing the pressure loss of gas during the delivery process and is convenient for use.

[0037] In actual application, the specific structure of the guiding groove 102 can be set accordingly according to actual usage requirements.

[0038] In some embodiments, a middle ring fire hole 302 and an outer ring fire hole 301 are defined between the first burner cap 310 and the burner main body 100. The middle ring fire hole 302 is located inside the ring of the annular gas chamber 101 and communicates with the annular gas chamber 101. The outer ring fire hole 301 is located outside the ring of the annular gas chamber 101 and communicates with the annular gas chamber 101. A pilot groove 311 is provided on the first burner cap 310, and both ends of the pilot groove 311 communicate with the middle ring fire hole 302 and the outer ring fire hole 301 respectively.

[0039] It can be understood that, as shown in Figure 1 , Figure 2 and Figure 3As shown in the figure, the first burner cap 310 is annular. A stepped structure is provided on the outer annular wall of the annular gas chamber 101. Support feet are provided on the lower side of the first burner cap 310 and it is placed on this stepped structure through the support feet. A gap is provided between the outer annular wall of the first burner cap 310 and the outer annular wall of the annular gas chamber 101 to form an annular outer ring flame holes 301. A gap is provided between the inner annular wall of the first burner cap 310 and the inner annular wall of the annular gas chamber 101 to form an annular middle ring flame holes 302. An ignition groove 311 is provided on the first burner cap 310 and its two ends are respectively communicated with the middle ring flame holes 302 and the outer ring flame holes 301. An ignition needle 110 and a thermocouple 120 are provided in the middle of the burner body 100. During use, the gas in the annular gas chamber 101 is respectively output from the middle ring flame holes 302 and the outer ring flame holes 301. The ignition needle 110 ignites the middle ring flame holes 302, and the burning flame spreads to the outer ring flame holes 301 through the ignition groove 311, thereby igniting the gas output from the outer ring flame holes 301 to achieve combustion heating. Its structure is simple and convenient for manufacturing and use; the thermocouple 120 senses the combustion situation of the flame. When the flame goes out accidentally, it can feedback an electrical signal to the control system to control the action of the corresponding gas valve and cut off the gas transmission to achieve the flameout protection function.

[0040] In actual application, in addition to the above structure, a plurality of through holes can also be drilled on the first burner cap 310 to form flame holes for gas output, which can be specifically set according to actual use needs.

[0041] In some embodiments, the swirl burner head further includes a second burner cap 320 and a second intake pipe 220. A central gas chamber 103 with an upper opening is provided in the middle of the burner body 100. The second burner cap 320 is provided on the upper side of the burner body 100 and corresponds to the opening of the central gas chamber 103. An inner ring flame holes 303 is defined between the second burner cap 320 and the burner body 100. The inner ring flame holes 303 is communicated with the central gas chamber 103. The second intake pipe 220 is connected to the burner body 100 and is provided with a second intake channel 221 communicated with the central gas chamber 103.

[0042] It can be understood that as Figure 1 、 Figure 2 and Figure 3As shown, a central gas cavity 103 with an upper opening is provided in the middle of the burner body 100. The second intake pipe 220 is connected to the burner body 100 and is located below the central gas cavity 103. It is provided with a second intake passage 221 communicating with the central gas cavity 103 for delivering gas to the central gas cavity 103. The lower side of the second burner cap 320 is also provided with support feet, and it is placed on the central gas cavity 103 through the support feet. There is a gap between the outer peripheral side wall of the second burner cap 320 and the side wall of the central gas cavity 103 to form an annular inner ring flame holes 303. The gas in the central gas cavity 103 is output through the inner ring flame holes 303 and ignited by the ignition needle 110. By adopting the design of multiple rings of flame holes, it is beneficial to achieve a larger combustion heating area and improve the power. In practical applications, the specific structure of the second burner cap 320 can be set accordingly according to actual usage needs.

[0043] In some embodiments, a gas nozzle 230 for delivering gas to the second intake passage 221 is connected to the end of the second intake pipe 220, and the pipe wall of the second intake pipe 220 is provided with an injection hole 222 communicating the external atmosphere with the second intake passage 221.

[0044] It can be understood that, as Figure 2 and Figure 3 shown, the lower end of the second intake pipe 220 is connected with a gas nozzle 230, the pipe wall of the second intake pipe 220 is provided with an injection hole 222, and the second intake passage 221 can communicate with the external atmosphere through the injection hole 222. During use, the gas nozzle 230 injects gas into the second intake passage 221, and the gas flowing at high speed in the second intake passage 221 draws in supplementary air from the external atmosphere through the injection hole 222, which is beneficial to full combustion during subsequent output; an adjusting spring 240 is sleeved on the outer surface of the second intake pipe 220, and the adjusting spring 240 is arranged corresponding to the injection hole 222. During use, the shielding situation of the injection hole 222 can be changed by the expansion and contraction of the adjusting spring 240, so as to change the amount of air supplement drawn in, and improve the adaptability. In practical applications, the specific structure of the second intake pipe 220 can be set accordingly according to actual usage needs.

[0045] In some embodiments, a shielding portion 321 for blocking foreign objects from entering is provided at the outlet of each of the inner ring flame holes 303, the middle ring flame holes 302, and the outer ring flame holes 301.

[0046] It can be understood that, as Figure 1 、 Figure 2 and Figure 3As shown, a protruding shielding portion 321 is provided on the outer side of the upper part of the second burner cap 320, so as to be able to shield the outlet of the inner ring burner holes 303 in the vertical direction, block foreign objects from entering the inner ring burner holes 303, and prevent foreign objects from blocking the inner ring burner holes 303; similarly, protruding shielding portions 321 are provided on both the outer ring and the inner ring of the upper part of the first burner cap 310, so as to be able to shield the outlets of the outer ring burner holes 301 and the middle ring burner holes 302 in the vertical direction, block foreign objects from entering the outer ring burner holes 301 and the middle ring burner holes 302, and prevent foreign objects from blocking the outer ring burner holes 301 and the middle ring burner holes 302, which is convenient for use. In actual application, the specific structure of the shielding portion 321 can be set accordingly according to actual usage needs.

[0047] In some embodiments, ribs 312 are provided on both sides of the ignition groove 311 in the width direction. It can be understood that, as Figure 1 and Figure 3 shown, by providing ribs 312 on both sides of the ignition groove 311 in the width direction, the ribs 312 protrude relative to the surface of the first burner cap 310, so as to be beneficial to reducing the possibility of foreign objects entering the ignition groove 311 and entering the annular gas chamber 101 from the ignition groove 311, which is convenient for use. In actual application, the specific structure of the ribs 312 can be set accordingly according to actual usage needs.

[0048] The cooking stove according to the second aspect embodiment of the present invention includes the swirl injection burner head according to the first aspect embodiment of the present invention above.

[0049] The cooking stove according to the embodiment of the present invention, by adopting the above-mentioned swirl injection burner head, is beneficial to reducing the wind noise and the conveying pressure loss of the gas in the annular gas chamber 101, and can reduce the pressure change of the output gas, so that the gas has a better and more stable output pressure, which is beneficial to obtaining a better combustion effect and is convenient for the cooking and heating use of the cooking stove.

[0050] Since the other components of the cooking stove according to the embodiment of the present invention are known to those of ordinary skill in the art, they will not be described in detail here.

[0051] The above has described the embodiments of the present invention in detail with reference to the drawings, but the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various changes can be made without departing from the purpose of the present invention.

Claims

1. A rotary spray type furnace head, characterized in that: include: A burner body, wherein the burner body is provided with an annular air cavity with an upper opening; A first fire cover, which is disposed on the upper side of the burner body and corresponds to the opening of the annular air cavity; A first air inlet pipe, the first air inlet pipe is connected to the burner body and is provided with a first air inlet passage connected with the annular air cavity, the bottom wall of the annular air cavity is a spiral structure surrounding the middle part of the burner body, and the bottom wall of the annular air cavity is correspondingly provided with a guide groove with a spiral structure, and the end of the guide groove is connected to the first air inlet passage.

2. The rotary spray type furnace head according to claim 1, characterized in that: The width of the upper slot of the guide slot gradually decreases along the conveying direction of the fuel gas.

3. The rotary spray furnace head according to claim 1, characterized in that: The depth of the guide groove gradually decreases along the conveying direction of the fuel gas.

4. The rotary spray type furnace head according to claim 2 or 3, characterized in that: The groove wall cross section of the guide groove is an arc-shaped structure.

5. The rotary spray type furnace head according to claim 1, characterized in that: A middle circle fire hole and an outer circle fire hole are defined between the first fire cover and the burner body. The middle circle fire hole is located on the inner side of the annular air cavity and is connected to the annular air cavity, and the outer circle fire hole is located on the outer side of the annular air cavity and is connected to the annular air cavity. An ignition groove is provided on the first fire cover, and two ends of the ignition groove are respectively connected to the middle circle fire hole and the outer circle fire hole.

6. The rotary spray type furnace head according to claim 5, characterized in that: It also includes a second fire cover and a second air intake pipe. A central air cavity with an upper opening is provided in the middle of the burner body. The second fire cover is arranged on the upper side of the burner body and corresponds to the opening of the central air cavity. An inner circle fire hole is defined between the second fire cover and the burner body. The inner circle fire hole is connected to the central air cavity. The second air intake pipe is connected to the burner body and is provided with a second air intake channel connected to the central air cavity.

7. The rotary spray type furnace head according to claim 6, characterized in that: The end of the second air intake pipe is connected to a gas nozzle for conveying gas to the second air intake passage, and the pipe wall of the second air intake pipe is provided with an injection hole connecting the external atmosphere with the second air intake passage.

8. The rotary spray type furnace head according to claim 6, characterized in that: The exits of the inner circle fire holes, the middle circle fire holes and the outer circle fire holes are all provided with shielding parts for preventing foreign objects from entering.

9. The rotary spray type furnace head according to claim 5, characterized in that: The ignition groove is provided with convex ribs on both sides along the width direction.

10. A cooking appliance, characterized in that: It comprises a rotary spray type burner head according to any one of claims 1 to 9.

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