A gas range for preheating combustion air

Abstract

The utility model discloses a gas big pot stove of preheating combustion air belongs to the field of pot stove, including setting in the stove gall of support, setting in the stove gall bottom center position's stove end, setting in the platform of support, and the platform central location is equipped with the round stove hole, and the stove gall top is equipped with the top baffle that extends to the stove gall inside, and the one side of top baffle near stove gall center is equipped with the inner surrounding board that extends to the stove gall, and the other side of top baffle is equipped with the outer surrounding board, the inner surrounding board, the outer surrounding board, top baffle, platform enclose and form the smoke exhaust chamber, and the smoke exhaust chamber is linked with stove gall inside, smoke exhaust pipe respectively, is equipped with preheating gas pipe in the smoke exhaust chamber, and preheating gas pipe one end is linked with the air inlet pipe, and the other end is linked with the combustion gas pipe, and the combustion gas pipe is connected in the stove end, and the air inlet pipe is connected in the outlet of fan. The air of fan delivery enters the stove end and carries out heat exchange with high temperature flue gas through preheating gas pipe, has strengthened the waste heat utilization, makes the air of entering the stove end heated, better combustion, makes the flue gas temperature of leaving the stove and stove reduce greatly.

Description

Technical Field

[0001] This utility model belongs to the field of cooking stove technology, specifically a gas-fired large cooking stove that preheats combustion air. Background Technology

[0002] Gas-fired wok stoves, characterized by rapid heating, powerful flames, and suitability for large-scale cooking, are widely used in canteens, restaurants, and hotels. Users are highly sensitive to energy costs. Current gas-fired wok stoves prioritize energy efficiency, incorporating cookware that fits snugly against the stove to create a relatively enclosed space between the cookware and the burner, minimizing the possibility of fumes escaping through gaps and improving cooking efficiency. However, excessively high exhaust temperatures, sometimes exceeding 180°C, prevent the efficient utilization of residual heat, increasing energy consumption and impacting the lifespan of downstream equipment such as flues and flue gas purification systems.

[0003] Some large cooking stoves on the market are equipped with water tanks. The flue pipe passes through the water tank, and the waste heat of the flue gas is used to heat the water in the tank, which lowers the temperature of the flue gas. However, the heat exchange path is relatively short, and the frequency of hot water use in the tank often changes, especially in summer when the amount of hot water used is less. If the water in the tank is not used in time after being heated, it will also affect the heat exchange effect. If the water in the tank cools down naturally after the large cooking stove is turned off, it will result in a waste of heat energy. Utility Model Content

[0004] The purpose of this utility model is to provide a gas-fired large pot stove that preheats combustion air to solve problems such as high flue gas emission temperature causing resource waste, affecting the service life of subsequent equipment, and low utilization rate of flue gas waste heat.

[0005] This utility model provides a gas-fired large-scale cooking stove with preheating combustion air, including a support frame, a stove interior mounted on the support frame, a burner head positioned at the center of the bottom of the stove interior, and a platform mounted on the support frame. The platform has a circular stove hole in the center, and the burner head has a gas supply pipe. The top of the stove interior has a top partition extending into the interior of the stove interior. The side of the top partition closest to the center of the stove interior has an inner cladding plate extending away from the stove interior, and the other side of the top partition has an outer cladding plate. The inner cladding plate, outer cladding plate, top partition, and platform together form a smoke exhaust chamber, which is connected to the interior of the stove interior and the smoke exhaust pipe. A preheating gas pipe is located in the smoke exhaust chamber, with one end connected to an air inlet pipe and the other end connected to a combustion air supply pipe. The combustion air supply pipe is connected to the burner head, and the air inlet pipe is connected to the outlet of a fan.

[0006] A further embodiment: the inner circumference plate is ring-shaped, and the diameter of the stove hole is smaller than the inner diameter of the inner circumference plate.

[0007] A further solution: The inner circumference plate is provided with several evenly distributed smoke exhaust holes.

[0008] A further solution: A mounting plate is provided on one side of the bracket, and a fan and a gas distribution pipe are mounted on the mounting plate. The gas distribution pipe is connected to the gas supply pipe.

[0009] A further option: the inner pot is a hollow frustum-shaped cone with a bottom diameter smaller than the top diameter.

[0010] A further solution: The bottom of the stove is provided with a base plate, and a center hole for the burner head to be installed through the base plate is opened in the center of the base plate.

[0011] A further solution: Two parallel support rods are fixedly mounted on the bracket, and the stove burner is fixed to the two support rods via a base plate.

[0012] A further option: the preheating gas pipe is an aluminum pipe or a copper pipe.

[0013] A further solution: the support frame is equipped with a baffle plate.

[0014] Compared with existing technologies, the advantages of this invention are as follows: the exhaust chamber is arranged in a ring shape above the inner side of the burner, making reasonable use of the stove space, with a compact layout, and ensuring the flow path of the flue gas, providing favorable conditions for heat exchange of the preheating gas pipe located in the exhaust chamber. The two ends of the preheating gas pipe are connected to the fan and the burner respectively through pipes. The air sent into the burner by the fan first exchanges heat with the high-temperature flue gas through the preheating gas pipe, which not only enhances the utilization of waste heat, heating the air entering the burner for better combustion, but also significantly reduces the temperature of the flue gas leaving the stove. The gas-fired large-pot stove provided by this invention has the characteristics of compact structure, high heat output capacity, complete combustion, energy saving, and reduced heat emissions, greatly reducing operating costs. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of a preferred embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure after the platform is removed in a preferred embodiment of this utility model;

[0018] Figure 3 for Figure 2 Top view;

[0019] Figure 4 for Figure 2 Side view;

[0020] Figure 5 This is a schematic diagram of the internal structure of the stove's inner chamber.

[0021] In the diagram: 1-Bracket; 101-Support rod; 2-Platform; 3-Burnhouse; 32-Inner panel; 321-Exhaust vent; 33-Top partition; 34-Outer panel; 35-Bottom plate; 4-Exhaust pipe; 5-Gas auxiliary pipe; 6-Gas inlet pipe; 7-Gas supply pipe; 8-Mounting plate; 9-Fan; 10-Gas distribution pipe; 11-Preheating pipe; 12-Burnhead; 13-Potware. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0024] In the description of this utility model, it should be understood that the use of terms such as "first" and "second" to define the components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0027] Please see Figures 1-5 As shown, this embodiment provides a gas-fired large-scale cooking stove for preheating combustion air, including a support 1, a burner 3 mounted on the support 1, a burner head 12 located at the center of the bottom of the burner 3, and a platform 2 mounted on the support 1. The platform 2 has a circular stove hole in the center, and the burner head 12 has a gas supply pipe 7. The top of the burner 3 has a top partition 33 extending into the burner 3. The side of the top partition 33 near the center of the burner 3 has an inner circumference plate 32 extending away from the burner 3, and the other side of the top partition 33... An outer perimeter plate 34 is provided. The inner perimeter plate 32, outer perimeter plate 34, top partition plate 33, and platform 2 enclose and form a smoke exhaust chamber. The connection between the inner perimeter plate 32, outer perimeter plate 34, top partition plate 33, and platform 2 must be kept sealed. The smoke exhaust chamber is connected to the interior of the stove bladder 3 and the smoke exhaust pipe 4. A preheating gas pipe 11 is provided in the smoke exhaust chamber. One end of the preheating gas pipe 11 is connected to the air inlet pipe 6, and the other end is connected to the auxiliary gas pipe 5. The auxiliary gas pipe 5 is connected to the burner head 12, and the air inlet pipe 6 is connected to the outlet of the fan 9.

[0028] The burner head 12 of the gas-fired wok stove is the core component of the combustion system, playing a crucial role in mixing gas and air, ignition and combustion, and heat transfer. The burner head 12 has an interface connecting to the gas supply pipe 7 to provide gas for combustion, and also an interface connecting to the auxiliary gas pipe 5 to provide oxygen for combustion. An igniter is also located inside the burner head 12. This application does not improve the burner head 12; it utilizes existing technology.

[0029] The circular burner hole in the center of platform 2 is used to place the cookware 13. The cookware 13 fits snugly against the circular burner hole, preventing smoke from escaping through the gap between the cookware 13 and platform 2. When the fan 9 is turned on, the ambient temperature air from the fan 9 outlet enters the preheating gas pipe 11 through the air inlet pipe 6, and then is supplied to the burner head 12 through the combustion auxiliary gas pipe 5. After the burner head 12 is ignited, stable combustion occurs within the furnace chamber 3. The smoke enters the exhaust chamber, where it circulates and exchanges heat with the air in the preheating gas pipe 11. To further improve the heat exchange effect, the preheating gas pipe 11 is made of aluminum or copper. The high-temperature smoke heats the air in the preheating gas pipe 11 before it is sent to the burner head 12 through the combustion auxiliary gas pipe 5. The increased temperature of the preheated air accelerates the gasification process of the gas and promotes rapid mixing of the gas and air, forming a more uniform combustible mixture. Furthermore, preheated air provides a higher initial temperature for combustion, reducing the activation energy required for fuel ignition, resulting in more complete combustion and reducing pollutants such as carbon monoxide (CO) and hydrocarbons (HC) produced by incomplete combustion, while also preventing the waste of unburned fuel. The heat carried by the high-temperature air directly participates in the combustion reaction, accelerating the combustion speed, increasing the heat released per unit time, and improving the heat output capacity of the stove. Air preheating does not require the consumption of other energy sources, greatly reducing energy consumption, emissions, and the burden on flue gas treatment.

[0030] The inner enclosure 32, outer enclosure 34, and top partition 33 are all annular. The inner enclosure 32 and outer enclosure 34 are placed vertically, with the inner enclosure 32 located inside the outer enclosure 34. The top partition 33 is placed horizontally below the inner enclosure 32 and outer enclosure 34. The distance between the inner enclosure 32 and outer enclosure 34 is less than or equal to the width of the top partition 33. The enclosed exhaust chamber is also annular, arranged in a ring above the inner side of the furnace liner 3, facilitating direct entry of flue gas into the exhaust chamber to preheat the air to a higher temperature for better combustion. The preheating gas pipe 11 is arranged within the annular exhaust chamber, ensuring sufficient air heat exchange and adequate preheating. The flue gas flows within the annular exhaust chamber and exits the gas stove via the exhaust pipe 4. The gas stove has a simple and compact structure, occupying little space.

[0031] One end of the preheating gas pipe 11 is connected to the air inlet pipe 6 through a pipe joint, and the other end is connected to the combustion-supporting gas pipe 5 through a pipe joint. Both pipe joints must pass through the outer plate 34, and the penetration point must be sealed to prevent flue gas leakage.

[0032] In some embodiments, please refer to Figure 1 , Figure 2 As shown, the inner circumference plate 32 is provided with several evenly distributed smoke exhaust holes 321. The flue gas in the stove bladder 3 enters the smoke exhaust chamber through the smoke exhaust holes 321. The flue gas entering the smoke exhaust chamber from the several smoke exhaust holes 321 affects each other, which helps the flue gas to be dispersed to the outer periphery of the preheating gas pipe 11 in the smoke exhaust chamber, thereby improving the heat exchange effect.

[0033] In some embodiments, please refer to Figure 1 , Figure 5 As shown, the diameter of the stove hole is smaller than the inner diameter of the inner shroud 32. When the cookware 13 is installed close to the stove hole, a gap is left between the inner shroud 32 and the cookware 13 to facilitate the entry of flue gas into the exhaust chamber through the gap from the exhaust hole 321. The platform 2 is placed on top of the bracket 1. The outer side of the platform 2 is supported by the bracket 1, and the inner side of the platform 2 is supported by the inner shroud 32.

[0034] In some embodiments, please refer to Figure 4 As shown, a mounting plate 8 is provided on one side of the bracket 1. A fan 9 and a gas distribution pipe 10 are mounted on the mounting plate 8. The gas distribution pipe 10 is connected to the gas supply pipe 7. The gas distribution pipe 10 is used to connect to the municipal gas pipeline, supplying gas to gas-fired stoves or other gas equipment. Each branch of the gas distribution pipe 10 is equipped with a valve to control the gas flow rate in the branch, thereby controlling the heat output. The structure and installation connection method of the gas distribution pipe 10 and the valves are all existing technologies. The gas supply pipe 7 is connected to one branch of the gas distribution pipe 10.

[0035] In some embodiments, please refer to Figure 5 As shown, the inner pot 3 is a hollow, frustum-shaped cone with a smaller bottom diameter than the top diameter, which facilitates even heating of the bottom of the cookware 13. The bottom of the inner pot 3 is provided with a base plate 35, and the center of the base plate 35 has a central hole for the burner head 12 to pass through and be installed. The burner head 12 is detachably fixed to the base plate 35, and the connection between the burner head 12 and the base plate 35 is kept sealed.

[0036] In some embodiments, please refer to Figure 1 As shown, two parallel support rods 101 are fixed on the bracket 1, and the stove bladder 3 is fixed on the two support rods 101 by the base plate 35.

[0037] It should be noted that heat insulation material can be coated on the top of platform 2 and the outer wall of the stove 3 to reduce heat radiation into the environment and prevent the working environment temperature from becoming too high. Enclosures (not shown in the attached diagram) can be installed around the front, back, left, and right sides or around the front, left, and right sides of the support 1. Heat dissipation holes are provided on the left and right side enclosures to create air convection on both sides, reducing heat radiation to the cook located in front of the stove and facilitating air extraction by the fan 9. To facilitate the cook's adjustment of the heat, the mounting plate 8 is located on the side of the support 1 in front of the stove, and the operating handle of the valve on the gas distribution pipe 10 branch can be installed through the enclosure 16.

[0038] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A gas big pot stove for preheating combustion air, comprising a support, a stove pot arranged on the support, a burner arranged at a central position of a bottom of the stove pot, a platform arranged on the support, a circular stove hole being arranged at a center of the platform, and a gas supply pipe arranged on the burner, characterized in that, The top of the stove is provided with a top partition extending into the stove. On the side of the top partition near the center of the stove, there is an inner circumference plate extending away from the stove. On the other side of the top partition, there is an outer circumference plate. The inner circumference plate, outer circumference plate, top partition, and platform together form a smoke exhaust chamber. The smoke exhaust chamber is connected to the inside of the stove and the smoke exhaust pipe. A preheating gas pipe is provided in the smoke exhaust chamber. One end of the preheating gas pipe is connected to the air inlet pipe, and the other end is connected to the combustion-supporting gas pipe. The combustion-supporting gas pipe is connected to the burner head, and the air inlet pipe is connected to the outlet of the fan.

2. A gas gurney according to claim 1, wherein The inner circumference plate is ring-shaped, and the diameter of the stove hole is smaller than the inner diameter of the inner circumference plate.

3. A gas gurney according to claim 1 wherein, The inner circumference plate is provided with several evenly distributed smoke exhaust holes.

4. A gas gurney according to claim 1 wherein, The bracket has a mounting plate on one side, on which a fan and a gas distribution pipe are mounted. The gas distribution pipe is connected to the gas supply pipe.

5. A gas gurney according to claim 1 wherein, The inner chamber of the stove is a hollow frustum-shaped cone, with the bottom diameter smaller than the top diameter.

6. A gas gurney according to claim 5, wherein The bottom of the stove is provided with a base plate, and a center hole for the burner head to be installed through the base plate is opened in the center of the base plate.

7. A gas-fired large-scale cooking stove for preheating combustion air according to claim 6, characterized in that, Two parallel support rods are fixed on the bracket, and the stove burner is fixed to the two support rods by the base plate.

8. A gas-fired large-scale cooking stove for preheating combustion air according to any one of claims 1-6, characterized in that, The preheating gas pipe is made of aluminum or copper.

9. A gas-fired large-scale cooking stove for preheating combustion air according to any one of claims 1-6, characterized in that, The support structure is equipped with a retaining wall.

Images