Internal spraying type stable burner and cooking range

Abstract

The utility model belongs to the technical field of cooking ranges, and particularly relates to an internal spraying type stable burner and a cooking range, which comprise a base provided with a barrel shell and a fire cover arranged in an inner cavity of the barrel shell, and are characterized in that a gas distribution cavity with a closed upper end is enclosed by the base, the barrel shell and the fire cover, and is communicated with a gas mixing pipe; a middle cavity with the upper end open and the lower end closed is formed in the fire cover, a fire gathering ring is formed in the middle cavity, and a plurality of air injection holes are formed in the side wall of the fire cover and communicated with the fire gathering ring and the air distribution cavity. According to the burner, the relative position of the fire gathering ring and the gas distribution cavity is changed, then the circulation direction of mixed gas is changed, on one hand, the fire gathering ring is located on the innermost side of the burner, and meanwhile flame can be prevented from spreading outwards in the circulation direction of the mixed gas from outside to inside; and on the other hand, the gas distribution cavity also has a certain heat insulation effect, so that the external conduction amount of combustion heat is reduced, the temperature of combustion flame is favorably maintained, the working temperature of the combustor is reduced, and the working stability of the combustor is favorably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of stoves, and in particular relates to an internal spray type stable burner and a stove. Background Art

[0002] In my country, where Chinese food is the main food, hotels, canteens and central kitchens are equipped with commercial gas stoves for cooking Chinese food. Existing commercial gas stoves are mainly composed of a furnace and a burner. The burner includes a fire cover, an air inlet pipe and an air inlet pipe. Air and gas enter the fire cover through the air inlet pipe and the air inlet pipe respectively, and burn in the combustion chamber surrounded by the furnace and the fire cover after passing through the fire cover. The burning flame heats the cooker placed on the furnace.

[0003] The current burners are divided into post-mixing type and pre-mixing type according to the mixing method of gas and air. Post-mixing type is a method of mixing and burning in the process of gas and air. Pre-mixing type is to mix gas and air before combustion, and then burn the mixed gas. Since post-mixing type is difficult to control the mixing degree, it is easy to cause uneven mixing and incomplete combustion, so it is gradually replaced by pre-mixing type.

[0004] Therefore, the inventor developed two side-spray burners, as specifically shown in the patents with publication numbers CN218328130U and CN220689069U. This burner does enhance the mixing effect of gas and air, allowing the gas to burn fully, which is environmentally friendly and energy-saving. Due to the porous structure of the fire cover, a metal material that is easy to form is generally used, which results in the fire cover and even the fire ring around the fire cover being easily burned red during use, with a high temperature, posing a safety hazard of explosion. Summary of the invention

[0005] The utility model aims to overcome the deficiencies of the prior art and to provide an internal spray type stable burner and a stove, which can reduce the external conduction of combustion heat by utilizing the air distribution cavity and the flow direction of the airflow by arranging the fire-closing ring at the innermost side of the burner.

[0006] The technical solution adopted by the utility model to solve its technical problems is: design an internal spray type stable burner, including a base, a cylinder shell is provided on the base, and a fire cover is provided in the inner cavity of the cylinder shell, which is characterized in that: the base, the cylinder shell and the fire cover together form an air distribution cavity with a closed upper end, the air distribution cavity is connected to the air mixing pipe, the fire cover is provided with a middle cavity with an open upper end and a closed lower end, the middle cavity forms a fire ring, and a plurality of jet holes are provided on the side wall of the fire cover, and the jet holes connect the fire ring and the air distribution cavity.

[0007] Furthermore, an air replenishing cavity is provided in the side wall of the cylinder shell, a first air replenishing hole connected to the air replenishing cavity is provided on the top wall of the cylinder shell, and the air replenishing cavity is also connected to the second air replenishing hole.

[0008] Furthermore, a side shell is installed on the base, and a fire chamber is formed between the side shell and the cylinder shell. The fire chamber has a flame outlet connected to the fire ring. An air supply distribution chamber is opened in the base, and the air supply distribution chamber is connected to the fire chamber and the air supply cavity respectively. A second air supply hole is opened on the base, and the air supply distribution chamber is connected to the second air supply hole.

[0009] Furthermore, it also includes a distribution plate, which is provided with a first distribution hole and a second distribution hole that penetrate the distribution plate, the first distribution hole connects the air replenishment cavity and the air replenishment distribution chamber, and the second distribution hole connects the fire chamber and the air replenishment distribution chamber.

[0010] Furthermore, an air inlet is provided on the outer wall of the fire cover, and an air outlet is provided on the inner wall. The air outlet and the air inlet are staggered up and down. An air through hole is provided in the side wall of the fire cover. The air outlet is connected with the air inlet through the air through hole. The air outlet, the air inlet and the air through hole constitute a jet hole.

[0011] Furthermore, the bottom end of the air hole is communicated with the air distribution cavity.

[0012] Furthermore, the air outlet is expanded from the outside to the inside.

[0013] Furthermore, the side wall of the fire cover includes a fire dividing plate and a gasket which are crimped together. The fire dividing plate and the gasket are distributed alternately. A notch is provided on the fire dividing plate. The gasket is crimped onto the inner side of the notch. The outer sides of two adjacent fire dividing plates form an air inlet hole, the outer sides of the notch form an air through hole, and the inner side of the notch and the two adjacent gaskets form an air outlet hole.

[0014] Furthermore, a positioning portion is provided on the fire dividing piece.

[0015] Furthermore, the gas mixing pipe is placed vertically, and the pipe opening of the gas mixing pipe is located below the bottom wall of the fire cover.

[0016] The utility model also provides a stove, comprising a burner, wherein the burner is the above-mentioned internal spray type stable burner.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The base, the cylinder shell and the fire cover together form an air distribution cavity with a closed upper end, which is connected to the gas mixing pipe. The fire cover is provided with a middle cavity with an open upper end and a closed lower end, which forms a fire-gathering circle. The side wall of the fire cover is provided with a plurality of jet holes, which connect the fire-gathering circle and the air distribution cavity, thereby changing the relative positions of the fire-gathering circle and the air distribution cavity, and then changing the flow direction of the mixed gas. On the one hand, the fire-gathering circle is located at the innermost side of the burner, and at the same time, the flow direction of the mixed gas from the outside to the inside can prevent the flame from spreading outward; on the other hand, the air distribution cavity also plays a certain heat insulation role, which jointly reduces the external conduction of the combustion heat, is conducive to maintaining the temperature of the combustion flame, thereby reducing the working temperature of the burner itself, and is conducive to improving its working stability.

[0019] 2. Since a gas replenishing cavity is provided in the side wall of the cylinder shell, and a first gas replenishing hole connected to the gas replenishing cavity is provided on the top wall of the cylinder shell, on the one hand, oxygen can be replenished for the burning flame through the gas replenishing cavity to play a role of secondary combustion support, so that the gas can burn more fully; on the other hand, the gas replenishing cavity can play the role of a heat-insulating cavity, further reducing the conduction of combustion heat, and at the same time can also increase the temperature of the replenished gas, which is conducive to further improving the combustion effect of the gas.

[0020] 3. Since a side shell is also installed on the base, a fire chamber is formed between the side shell and the cylinder shell, and an air supply distribution chamber is opened in the base. The air supply distribution chamber is connected to the fire chamber and the air supply cavity respectively, which can replenish air for the fire combustion chamber, thereby reducing the air pressure difference between the fire ring and the fire combustion chamber, avoiding excessive pressure difference and causing the airflow in the fire ring to flow back into the fire combustion chamber to extinguish the fire, which can effectively improve the stability of the fire.

[0021] 4. Since the distribution plate is provided with a first distribution hole and a second distribution hole which pass through the distribution plate, the first distribution hole connects the air replenishment cavity and the air replenishment distribution chamber, and the second distribution hole connects the fire chamber and the air replenishment distribution chamber, on the one hand, the air replenishment position can be constrained by the first distribution hole and the second distribution hole; on the other hand, the pressure and flow rate of the supplementary air can be increased by limiting the flow, which is conducive to the supplementary air quickly entering the air replenishment cavity and the fire chamber.

[0022] 5. Since the air outlet and air inlet holes in the side wall of the fire cover are arranged in an up-and-down staggered shape, and then the air outlet and air inlet holes are connected through the air holes, the bending degree of the mixed gas of gas and air entering the fire ring channel is enhanced, which can reduce the backfire effect and enhance the stability of flame combustion. At the same time, the bending channel can also enhance the mixing effect of gas and air, which helps to further enhance the combustion quality of gas.

[0023] 6. Since the bottom end of the air hole is connected with the air distribution cavity, the mixed gas of the fuel gas and the air can enter the air outlet hole in two ways, and the mixing effect can be further enhanced in the process of the two mixed gases intersecting.

[0024] 7. Since the air outlet is expanded from the outside to the inside, a decreasing air pressure difference can be formed from the outside to the inside, reducing the flashback effect. At the same time, it also reduces the air supply pressure of the air outlet and the air supply flow rate, which is conducive to maintaining the combustion stability of the flame.

[0025] 8. Since the side wall of the fire cover includes fire dividing plates and gaskets that are crimped together, the fire dividing plates and the gaskets are distributed alternately, a notch is provided on the fire dividing plates, the gasket is crimped onto the inner side of the notch, the outside of two adjacent fire dividing plates forms an air inlet, the outer side of the notch forms an air through hole, and the inner side of the notch and the two adjacent gaskets form an air outlet, the difficulty of making the fire cover can be reduced and it is easy to implement.

[0026] 9. Since the ignition divider is provided with a positioning portion, it is convenient to determine the relative installation position between two adjacent ignition dividers, and the structure of the jet hole can be reliably completed.

[0027] 10. Since the mixing pipe is placed vertically and the mouth of the mixing pipe is located below the bottom wall of the fire cover, the mixed gas can be sprayed on the bottom cover of the fire cover, which is beneficial for the collision and turbulent mixing of the mixed gas of the gas and the air, and further enhances the mixing effect of the gas and the air.

[0028] 12. The utility model is cleverly designed. By adjusting the relative position of the fire-gathering ring and the air distribution cavity, the flow direction of the mixed gas is changed, the external conduction of the combustion heat is reduced, and the working temperature of the burner itself is reduced. At the same time, it is also beneficial to maintain the working temperature of the flame. It is worthy of promotion and use in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional exploded structural diagram of the utility model;

[0030] Figure 2 yes Figure 1 A-direction view;

[0031] Figure 3 yes Figure 2 Middle BB section view;

[0032] Figure 4 yes Figure 2 Middle CC section view;

[0033] Figure 5 yes Figure 4 Middle DD section view;

[0034] Figure 6 yes Figure 4 EE section view.

[0035] The markings in the figure are: 1. base; 2. cylinder shell; 3. fire cover; 4. first air supply hole; 5. fire distribution plate; 6. gasket; 7. air inlet hole; 8. air through hole; 9. air outlet hole; 10. side shell; 11. fire gathering ring; 12. positioning part; 13. air distribution cavity; 14. air supply cavity; 15. spark chamber; 16. flame nozzle; 17. spark gas pipe; 18. electronic ignition needle; 19. distribution plate; 20. air supply distribution chamber; 21. second air supply hole; 22. gas mixing pipe; 23. first distribution hole; 24. second distribution hole. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] When the utility model is in working state, the end close to the ground is defined as the bottom end or the lower end, and the other end far from the ground is defined as the top end or the upper end; the side close to the axis of the burner is defined as the inner side, and the other side far from the axis of the burner is defined as the outer side.

[0038] like Figure 2 As shown, the utility model is provided with a cylinder shell 2 on the base 1. The cylinder shell 2 here can adopt a split structure that can be separated from the base 1, and can adopt an integrated structure with the base 1. Neither of them affects the assembly position relationship with the fire cover 3. The split structure is just adopted to facilitate the molding and assembly of various components. A fire cover 3 is provided in the inner cavity of the cylinder shell 2. The fire cover 3 is provided with a middle cavity which is open at the upper end and closed at the lower end. The middle cavity forms a fire ring 11. The base 1, the cylinder shell 2 and the fire cover 3 together form an air distribution cavity 13 which is closed at the upper end. The air distribution cavity 13 is located at the outer periphery of the fire ring 11, forming a structure in which the air distribution cavity 13 surrounds the fire ring 11. A plurality of jet holes are provided on the side wall of the fire cover 3. The jet holes connect the fire ring 11 and the air distribution cavity 13. The bottom wall of the air distribution cavity 13 is connected to a mixing pipe 22. The pipe mouth of the mixing pipe 22 is located below the bottom wall of the fire cover 3, so that the air distribution cavity 13 is connected to the mixing pipe 22. The mixed gas can be sprayed on the bottom cover of the fire cover 3, which is beneficial to the collision and turbulent mixing of the mixed gas of the gas and the air, and further enhances the mixing effect of the gas and the air.

[0039] Specifically, Figure 1 As shown, a fire dividing sheet 5 and a gasket 6 are provided in the side wall of the fire cover 3, and the fire dividing sheet 5 and the gasket 6 are arranged alternately. A notch is provided on the fire dividing sheet 5, and the gasket 6 is pressed on the inner side of the notch. The outside of two adjacent fire dividing sheets 5 forms an air inlet 7, and the outer side of the notch forms an air hole 8. Figure 6As shown, the bottom end of the air hole 8 is connected to the air distribution cavity 13, and the inner side of the notch and the two adjacent gaskets 6 form an air outlet 9, which is expanded from the outside to the inside, so that the air inlet 7 on the outer wall of the fire cover 3 and the air outlet 9 on the inner wall of the fire cover 3 are arranged in an up-down staggered state, and then connected through the air hole 8, so that the air inlet 7, the air hole 8 and the air outlet 9 constitute the air jet. This structure of the air jet enhances the bending degree of the mixed gas of the gas and air when entering the channel of the fire ring 11, which can reduce the backfire effect and enhance the stability of the flame combustion. At the same time, the bending channel can also enhance the mixing effect of the gas and air, which helps to further enhance the combustion quality of the gas. The outer wall of the fire-dividing piece 5 is also provided with an outward protruding positioning portion 12, which can also be a concave positioning portion 12, and of course it can also be set on the inner wall of the fire-dividing piece 5, which is convenient for determining the relative installation position between two adjacent fire-dividing pieces 5 and reliably completing the structure of the air jet. The fire cover 3 can also adopt a specific structure other than the fire dividing plate 5 and the gasket 6, as long as an air inlet hole 7 is opened on the outer wall of the fire cover 3 and an air outlet hole 9 is opened on the inner wall, the air outlet hole 9 and the air inlet hole 7 are arranged in an upper and lower staggered state, and an air through hole 8 is opened in the side wall of the fire cover 3, and the air outlet hole 9 is connected with the air inlet hole 7 through the air through hole 8, and this main structure can be maintained.

[0040] In order to further reduce the external conduction of combustion heat, such as Figure 4 As shown, the utility model further provides an air replenishing cavity 14 in the side wall of the cylinder shell 2, and a first air replenishing hole 4 connected to the air replenishing cavity 14 is provided on the top wall of the cylinder shell 2. The air replenishing cavity 14 can replenish oxygen for the burning flame, thereby playing a role of assisting combustion again, so that the fuel gas can burn more fully; the air replenishing cavity 14 can also play the role of a heat-insulating cavity, further reducing the conduction of combustion heat, and at the same time can also increase the temperature of the replenished gas, which is beneficial to further improve the combustion effect of the fuel gas.

[0041] In order to enhance the stability of the external fire, Figure 3 As shown, the utility model further has a side shell 10 installed on the base 1, and the side shell 10 and the cylinder shell 2 form a fire chamber 15, and a fire gas pipe 17 and an electronic ignition needle 18 are arranged in the fire chamber 15. The fire chamber 15 has a flame-spraying port 16 connected to the fire ring 11, and a gas supply distribution chamber 20 is opened in the base 1, and a distribution plate 19 is also installed in the base 1. Figure 5As shown, the distribution plate 19 is provided with a first distribution hole 23 and a second distribution hole 24 which penetrate the distribution plate 19, the first distribution hole 23 is connected to the air replenishment chamber 14 and the air replenishment distribution chamber 20, and the second distribution hole 24 is connected to the fire chamber 15 and the air replenishment distribution chamber 20. A second air replenishment hole 21 is provided on the base 1, and the second air replenishment hole 21 is connected to the air replenishment distribution chamber 20, so that the air replenishment distribution chamber 20 is connected to the fire chamber 15 and the air replenishment chamber 14 respectively, and the air replenishment chamber 14 is also connected to the second air replenishment hole 21, so that air can be replenished into the air replenishment distribution chamber 20 through the second air replenishment hole 21, and then the pressure difference between the fire ring 11 and the fire combustion chamber is reduced by the replenishment of air, so as to avoid the pressure difference being too large and causing the airflow in the fire ring 11 to flow back into the fire combustion chamber to extinguish the fire, which can effectively improve the stability of the fire.

[0042] The working process of the utility model is as follows:

[0043] The mixed gas of air and fuel gas enters the air distribution cavity 13 from bottom to top through the mixing pipe 22. The airflow collides with the bottom cover of the fire cover 3 under the action of inertia, and is forced to change the flow direction after the impact-type mixing. It flows turbulently around along the bottom cover of the fire cover 3, and cross-mixes with the airflow from bottom to top along the periphery again. Then, it enters the air distribution cavity 13 located on the periphery of the fire cover 3, enters the fire gathering circle 11 through the jet holes of a specific structure, and is ignited by the small fire sprayed from the fire chamber 15 to form a burning flame. During the combustion process, the mixed gas enters the fire-gathering ring 11 on the inner side from the air distribution cavity 13 on the outer side through the jet hole, forming an inward-spraying shape, which reduces the outward radiation and spread of the flame and reduces the heat received by the fire cover 3 and the cylinder shell 2; at the same time, the expanded shape of the air outlet 9 makes the mixed gas in the process of being sprayed into the fire-gathering ring 11. On the one hand, the pressure in the air outlet 9 decreases from the outside to the inside, and the pressure difference can be used to prevent backfire; on the other hand, the staggered structure of the air inlet 7 and the air outlet 9 in the jet hole is used to increase the tortuosity of the airflow path, which can enhance the mixing effect of the mixed gas.

[0044] During the above-mentioned combustion process, air is replenished into the air replenishment distribution chamber 20 through a blower, and a part of the air enters the air replenishment chamber 14 located on the outer periphery of the air distribution chamber 13 through the first distribution hole 23, and then passes through the first air replenishment hole 4 on the top wall of the air replenishment chamber 14 to reach the top of the fire-gathering circle 11, so as to replenish oxygen for the burning flame, so that the gas can burn more fully, which is energy-saving and environmentally friendly; and the air replenishment chamber 14 itself can play a certain heat insulation role, and the air circulating in the process of air replenishment also plays a certain wind-cooling role on the air replenishment chamber 14, thereby helping to reduce the temperature of the cylinder shell 2; another part of the air enters the fire chamber 15 through the second distribution hole 24, and reduces the air pressure difference between the fire chamber 15 and the fire-gathering circle 11 through air replenishment, thereby playing a role in stabilizing the fire.

[0045] The burner can also be used in a gas stove to form an internal spray type gas stove.

[0046] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model.

Claims

1. An internal spray type stable burner, comprising a base, a cylinder shell is arranged on the base, and a fire cover is arranged in the inner cavity of the cylinder shell, characterized in that: The base, the cylinder shell and the fire cover together form an air distribution cavity with a closed upper end, which is connected to the gas mixing pipe. The fire cover is provided with a middle cavity with an open upper end and a closed lower end, which forms a fire gathering circle. The side wall of the fire cover is provided with multiple jet holes, which connect the fire gathering circle and the air distribution cavity.

2. The internal spray type stable burner according to claim 1, characterized in that: An air replenishing cavity is provided in the side wall of the cylinder shell, a first air replenishing hole connected to the air replenishing cavity is provided on the top wall of the cylinder shell, and the air replenishing cavity is also connected to the second air replenishing hole.

3. The internal spray type stable burner according to claim 2, characterized in that: A side shell is also installed on the base, and a fire chamber is formed between the side shell and the cylinder shell. The fire chamber has a flame-spraying port connected to the fire-gathering ring. An air supply distribution chamber is opened in the base, and the air supply distribution chamber is connected to the fire chamber and the air supply cavity respectively. The second air supply hole is opened on the base, and the air supply distribution chamber is connected to the second air supply hole.

4. The internal spray type stable burner according to claim 3, characterized in that: It also includes a distribution plate, which is provided with a first distribution hole and a second distribution hole that penetrate the distribution plate, the first distribution hole is connected to the air replenishment cavity and the air replenishment distribution chamber, and the second distribution hole is connected to the fire chamber and the air replenishment distribution chamber.

5. The internal spray type stable burner according to any one of claims 1 to 4, characterized in that: An air inlet is provided on the outer wall of the fire cover, and an air outlet is provided on the inner wall. The air outlet and the air inlet are arranged in an up-and-down staggered shape. An air through hole is provided in the side wall of the fire cover. The air outlet is connected with the air inlet through the air through hole. The air outlet, the air inlet and the air through hole constitute a jet hole.

6. The internal spray type stable burner according to claim 5, characterized in that: The bottom end of the air hole is communicated with the air distribution cavity.

7. The internal spray type stable burner according to claim 6, characterized in that: The air outlet is in a flared shape from outside to inside.

8. The internal spray type stable burner according to claim 7, characterized in that: The side wall of the fire cover includes a fire dividing plate and a gasket which are crimped together. The fire dividing plate and the gasket are distributed alternately. A notch is provided on the fire dividing plate. The gasket is crimped onto the inner side of the notch. The outside of two adjacent fire dividing plates forms an air inlet hole, the outer side of the notch forms an air through hole, and the inner side of the notch and the two adjacent gaskets form an air outlet hole.

9. The internal spray type stable burner according to claim 8, characterized in that: A positioning portion is provided on the fire dividing piece.

10. A stove, comprising a burner, characterized in that: The burner is an internal spray type stable burner as described in any one of claims 1 to 9.

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