A spiral racetrack oven
The spiral track oven solves the problems of large area, low efficiency and thermal expansion and contraction of traditional ovens through spiral structure and uniformly distributed fire pipe design, achieving efficient baking and stable support.
Patent Information
- Application Number
- CN202011171775.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-10-28
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2040-10-28
AI Technical Summary
Traditional ovens cover a large area and low production efficiency. Due to poor heating effect and thermal expansion and contraction problems, the oven is prone to damage.
The design of a spiral track oven is adopted. The guide rails are surrounded in the spiral structure along the height direction, and the fire pipe is inserted into the spiral structure along the height direction. The fan parts are used to evenly distribute heat and are stably baked through the plug-in structure between the convex strips and the grooves. Side wall of the room.
The production efficiency and baking effect of the oven are improved, and the oven damage caused by thermal expansion and contraction is avoided, so as to achieve uniform heat distribution and stable support of the side wall of the baking room.
Smart Images
Figure CN112425612B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of ovens, and in particular to a spiral racetrack type oven. Background Art
[0002] Ovens can be used for baking to make bread, hamburgers, cakes and other products. Traditional ovens are generally long strip structures, that is, the preforms (the preforms are semi-finished products to be baked) pass through the oven along a straight conveyor line and eventually become products. Obviously, traditional ovens not only occupy a large area, but also have low production efficiency. The food conveying device disclosed in the patent application document with patent application number CN201811571276.X, although it allows the oven to accommodate the total number of preforms, has the problem of poor heating effect and reduced baking efficiency. At the same time, when the temperature in the oven is greatly increased in order to improve the baking efficiency of the oven, the thermal expansion and contraction of the oven itself can easily cause damage to the oven. Summary of the invention
[0003] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a spiral raceway type oven, which can not only bake a large number of preforms, but also improve the problem of insufficient and uneven heat distribution in the oven; and can avoid the problem of damage to the oven due to thermal expansion and contraction caused by excessive temperature in the oven.
[0004] The purpose of the present invention is achieved by the following technical solutions:
[0005] A spiral racetrack oven, comprising a baking room, a guide rail, a transmission carrier, a fan component and a plurality of fire tubes for burning gas to generate heat; the guide rail is wound into a spiral structure along the height direction, and the outer contour of the spiral structure in a top view is elliptical; the transmission carrier is arranged along the extension direction of the guide rail, and the transmission carrier is used to transport the package along the extension direction of the guide rail, and a plurality of the fire tubes are inserted in the spiral structure along the height direction, and the plurality of the fire tubes are respectively distributed on opposite sides of the long axis of the elliptical shape, and the fire tubes are close to the center of the elliptical shape and away from the end of the long axis of the elliptical shape; the fan component is arranged in the spiral structure, and the fan component is used to guide the airflow from the center of the elliptical shape to the two ends of the long axis of the elliptical shape;
[0006] The baking room includes a plurality of baking oven panels, and the baking oven panels are in a long strip structure. A groove is provided on one side of the baking oven panel, and a convex strip is provided on the side of the baking oven panel opposite to the groove. The groove and the convex strip both extend along the length direction of the baking oven panel. Adjacent baking oven panels are connected end to end by plugging the convex strip of one of them into the groove of the other one, so that the baking oven panels are connected end to end to form a baking room side wall extending in the horizontal direction on the baking room.
[0007] Furthermore, the baking room is of a rectangular structure, and the four baking room side walls of the baking room are all formed by a plurality of the baking oven storage panels, and the adjacent baking room side walls of the baking room are fixedly connected to each other.
[0008] Furthermore, the width of the groove minus the width of the convex strip is greater than 1 mm.
[0009] Furthermore, the baking room also includes a rectangular frame, which has a horizontally placed mounting bar. A fixing piece is provided on the side of the baking oven panel facing the interior of the baking room. The fixing piece is provided with a positioning groove. During installation, each of the positioning grooves is suitable for sliding toward the mounting bar in a horizontal direction so that the convex strip of one of the adjacent baking oven panels can be plugged into the groove of the other.
[0010] Furthermore, the mounting bar protrudes toward the inner side close to the baking room to form a support bar; the baking room also includes a top cover, which is detachably placed on the support bar; the top cover is connected to at least two exhaust fans, and the two exhaust fans are respectively located at both ends of the short axis of the elliptical shape.
[0011] Furthermore, the guide rail includes an inner ring and an outer ring, and the outer contours of the inner ring and the outer ring in a top view are both elliptical. The inner ring spirals upward along the vertical height direction, then spirals outward along the horizontal direction, and then spirals downward along the vertical direction to form the outer ring; the fire tubes are interspersed in the inner ring and the outer ring.
[0012] Furthermore, the fan component includes an impeller, an air duct and a plurality of air outlet pipes connected to the air duct, the impeller is installed at the center of the elliptical shape, the impeller is used to introduce airflow into the air duct, and the plurality of air outlet pipes are interspersed in the spiral structure along the height direction.
[0013] Furthermore, the plurality of air outlet pipes are respectively arranged at both ends of the long axis of the elliptical shape;
[0014] The fan component is a centrifugal fan, and a plurality of air guide ducts are provided, each of which is respectively connected to a plurality of air outlet ducts.
[0015] Furthermore, a plurality of the air outlet pipes are provided with a plurality of air outlet side holes, and the plurality of air outlet side holes are distributed at intervals along the length direction of the air outlet pipe and / or the circumference of the air outlet pipe, and the air outlet pipe is in a Y-shaped structure.
[0016] Further, the fire tube is provided with a plurality of ignition holes, and the plurality of ignition holes are distributed at intervals along the length direction of the fire tube and / or the circumference of the fire tube;
[0017] The fire tube is in a V-shaped structure, and the corner of the fire tube is closer to the fan component than the two ends of the fire tube;
[0018] The spiral racetrack oven also includes an air pipe and a gas pipe, wherein the air pipe is connected to the fire pipe after merging with the gas pipe;
[0019] The air pipe and the gas pipe are controlled by a zero-pressure proportional combustion system.
[0020] Compared with the prior art, the present invention has the following beneficial effects:
[0021] 1. By setting the guide rail into a spiral structure, the transport carrier can carry a large number of preforms for fermentation in the baking chamber. Importantly, by inserting the fire tube directly into the spiral structure along the height direction to ensure that the heat source is closely around the guide rail, the preforms can move at high speed on the guide rail, thereby evenly receiving heat to achieve baking. At this time, the preforms can be sent into the baking chamber in large quantities, and the products generated after baking can be sent out of the baking chamber in large quantities, which greatly improves the production efficiency.
[0022] 2. In addition, since the transmission carrier can carry a large number of preforms, the heat required in the baking chamber is also huge. The fire tube adopts open flame heating, which properly solves the demand. At the same time, the preforms run on the guide rail at a high speed and will not be baked at a fixed point by open flame for a long time, so that the baking effect is better.
[0023] 3. Both baking effect and output are taken into consideration.
[0024] 4. Since the plurality of fire tubes are respectively distributed on opposite sides of the long axis of the ellipse, the fire tubes are close to the center of the ellipse and away from the end of the long axis of the ellipse. At this time, the heat source is mainly close to the center of the ellipse, and the heat is cyclically discharged to the two ends of the long axis of the ellipse through the fan component, so that the temperature in the entire baking chamber is more uniform. In addition, since the transmission carrier carries the preform at a high speed at this time, the preform is evenly heated in most of the travel of the guide rail, so the baking efficiency is higher. At the same time, the fan component can make the temperature in the baking chamber flow cyclically to avoid local high temperature.
[0025] 5. Adjacent oven storage panels are connected by the convex strip of one and the groove of the other, so that the oven storage panels are connected end to end to form the oven side wall extending horizontally on the oven. In this way, when the oven side wall is heated, the oven storage panels are heated and expanded and squeezed against each other. Based on the plug-in structure of the convex strip and the groove, not only the stable support effect of the oven side wall is satisfied, but also because each oven storage panel can expand by heat, and when the oven storage panel is heated, the adjacent oven storage panels are away from each other, thereby avoiding the stress concentration and damage of a certain part of the oven side wall. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1It is a structural schematic diagram of a baking furnace combustion system of the present invention;
[0027] Figure 2 for Figure 1 A partial enlarged view of A shown;
[0028] Figure 3 for Figure 1 The structural schematic diagram of the fire tube shown;
[0029] Figure 4 It is a structural schematic diagram of a baking oven circulation system of the present invention;
[0030] Figure 5 4 is a schematic diagram of the structure of the fan component;
[0031] Figure 6 It is a structural schematic diagram of a spiral racetrack type oven of the present invention;
[0032] Figure 7 It is a structural schematic diagram of a baking oven storage plate of the present invention;
[0033] Figure 8 It is a structural schematic diagram of the baking room of the present invention, wherein the top cover is hidden in order to clearly see the internal structure of the baking room;
[0034] Fig. 9 for Figure 8 A partial enlarged view of point B.
[0035] In the figure: 1. guide rail; 11. inner ring; 12. outer ring; 2. fan component; 21. air guide duct; 22. air outlet duct; 23. air outlet side hole; 3. fire pipe; 31. ignition hole; 4. baking room; 41. baking oven panel; 411. groove; 412. convex strip; 413. through hole; 42. rectangular frame; 421. mounting strip; 422. fixing piece; 423. positioning groove; 424. support strip; 43. top cover; 5. exhaust fan. DETAILED DESCRIPTION
[0036] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.
[0037] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element, or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element, or there may be an element centered thereon. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.
[0038] Unless otherwise defined, all technical terms and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0039] Figure 1-Figure 2 A baking furnace combustion system of the present invention is shown, and the baking furnace combustion system is used to be installed in a baking room, that is, when working, the baking furnace combustion system is installed in a baking room with a large space, and the temperature in the baking room is suitable for the fermentation of the preforms. The baking furnace combustion system includes a guide rail 1, a transmission carrier, and a plurality of fire tubes 3 for burning gas to generate heat. The guide rail 1 is wound into a spiral structure along the height direction, that is, the guide rail 1 is stacked and wound into a spiral structure; because the guide rail 1 is wound into a spiral structure along the height direction, the length of the guide rail 1 is extended, so that the guide rail 1 can carry more preforms. The outer contour of the top view of the spiral structure is elliptical, so as to shorten the width direction of the spiral structure, thereby reducing the required floor space of the baking furnace combustion system. The transmission carrier is arranged along the extension direction of the guide rail 1, and the transmission carrier is used to transport the preforms to move along the extension direction of the guide rail 1. The plurality of fire tubes 3 are interspersed in the spiral structure along the height direction to transfer heat to the guide rail 1 at a close distance, thereby making full use of the heat.
[0040] It can be understood that regarding the setting mode of the guide rail 1 and the transmission carrier, the food transmission device disclosed in the patent application document with patent application number CN201811571276.X can be cited. For example: the transmission carrier includes a chain, which can move along the extension direction of the guide rail 1 and is used to transport the package along the extension direction of the guide rail 1. It can be understood that the chain can be driven by the cooperation of the drive motor and the gear in the prior art. It should be noted here that the chain can be replaced by existing technologies such as wire ropes or drum lines, as long as the chain can move along the extension direction of the guide rail 1. The transmission carrier also includes a walking bracket, which is used to support a tray or a plate, and the tray or the plate is used to hold the package. The walking bracket is fixedly connected to the chain and moves along the extension direction of the guide rail 1 with the chain, so that the transportation process of the tray or the plate is smoother.
[0041] The baking furnace combustion system of the present invention sets the guide rail 1 into a spiral structure, so that the transmission carrier can carry a large number of preforms for fermentation in the baking chamber. Importantly, by directly inserting the fire tube 3 into the spiral structure in the height direction to ensure that the heat source is closely around the guide rail 1, the preforms can move at a high speed on the guide rail 1, so as to evenly receive heat to achieve baking. At this time, the preforms can be sent into the baking chamber in large quantities, and the products generated after baking can be sent out of the baking chamber in large quantities, which greatly improves the production efficiency. In addition, based on the fact that the transmission carrier can carry a large number of preforms, the heat required in the baking chamber is also huge, and the fire tube 3 adopts an open flame heating method, which properly solves the demand. At the same time, the preforms run on the guide rail 1 at a high speed, so that they will not be baked at a fixed point for a long time by the open flame, so that the baking effect is better. In other words, both the baking effect and the output are taken into account at the same time.
[0042] As a further preferred embodiment of the baking furnace combustion system: the guide rail 1 includes an inner ring 11 and an outer ring 12, the outer contours of the inner ring 11 and the outer ring 12 in the top view are both elliptical, the inner ring 11 is spirally wound upward in the vertical height direction, then spirally wound outward in the horizontal direction, and then spirally wound downward in the vertical direction to form the outer ring 12; the fire tube 3 is inserted in both the inner ring 11 and the outer ring 12. This arrangement not only further increases the output, but also ensures that there is enough heat in the baking chamber.
[0043] As a further preferred embodiment of a baking furnace combustion system: Figure 3 The fire tube 3 is provided with a plurality of ignition holes 31, and the plurality of ignition holes 31 are distributed at intervals along the length direction and / or circumference direction of the fire tube 3. Such an arrangement can make the heat distribution of the fire tube 3 more uniform, thereby making the temperature distribution in the baking chamber more uniform. In addition, it can also prevent the local temperature of the fire tube 3 from being too high, thereby causing the package to be damaged.
[0044] As a further preferred embodiment of the baking furnace combustion system: the fire tube 3 is in a V-shaped structure, and the corner of the fire tube 3 is closer to the center of the ellipse than the two ends of the fire tube 3. It can be understood that the corner of the fire tube 3 is the bending part of the V-shaped structure. This arrangement allows heat to be more evenly distributed in the center of the ellipse.
[0045] As a further preferred embodiment of a baking oven combustion system: the baking oven combustion system further includes an air pipe and a gas pipe (not shown in the figure), and the air pipe is connected to the fire pipe 3 after merging with the gas pipe. In order to improve combustion efficiency and facilitate maintenance, the air pipe and the gas pipe are provided with a plurality of them, and one fire pipe 3 corresponds to one air pipe and one gas pipe. More importantly, for safety considerations, the air pipe and the gas pipe are controlled by an existing zero-pressure proportional combustion system.
[0046] Figure 4 A baking oven circulation system of the present invention is shown, and the baking oven circulation system includes the baking oven combustion system and the fan component 2. Specifically, the fan component 2 is arranged in the spiral structure, and the fan component 2 is used to guide the airflow from the center of the elliptical shape to the two ends of the long axis of the elliptical shape. Specifically, a plurality of the fire tubes 3 are respectively distributed on the opposite sides of the long axis of the elliptical shape, and the fire tubes 3 are close to the center of the elliptical shape and away from the ends of the long axis of the elliptical shape. At this time, the heat source is mainly close to the center of the elliptical shape, and the heat is cyclically discharged to the two ends of the long axis of the elliptical shape through the fan component 2, so that the temperature in the entire baking chamber is more uniform. In addition, since the transmission carrier carries the preform at a high speed at this time, the preform is also evenly heated in most of the travel of the guide rail 1, so the baking efficiency is better. At the same time, the fan component 2 can make the temperature in the baking chamber flow cyclically to avoid local high temperature.
[0047] As a further preferred embodiment of a baking oven circulation system: Figure 5 The fan component 2 includes an impeller (not shown in the figure), an air duct 21 and a plurality of air outlet pipes 22 connected to the air duct 21. The impeller is installed at the center of the elliptical shape and is used to introduce airflow into the air duct 21. The plurality of air outlet pipes 22 are inserted into the spiral structure along the height direction. This arrangement allows the hot air flowing out of the air outlet pipe 22 to be evenly distributed on the guide rail 1, so that the heat absolutely contacts the preforms, so as to ensure that each preform receives more stable baking heat.
[0048] As a further preferred embodiment of the baking oven circulation system: the plurality of air outlet pipes 22 are respectively arranged at both ends of the long axis of the ellipse. It can be understood that, based on the plurality of fire tubes 3 being respectively distributed on opposite sides of the long axis of the ellipse, and the fire tubes 3 being close to the center of the ellipse and away from the end of the long axis of the ellipse, such an arrangement can make the hot air in the baking chamber circulate more orderly.
[0049] As a further preferred embodiment of the baking oven circulation system: the fan component 2 is a centrifugal fan, and a plurality of air guide pipes 21 are provided, and each of the air guide pipes 21 is respectively connected to a plurality of air outlet pipes 22. Obviously, the centrifugal fan can evenly discharge heat along each air outlet pipe 22, thereby making the temperature in the baking chamber more uniform.
[0050] As a further preferred embodiment of the baking oven circulation system: the plurality of the air outlet pipes 22 are provided with a plurality of air outlet side holes 23, and the plurality of the air outlet side holes 23 are distributed at intervals along the length direction of the air outlet pipe 22 and / or the circumference of the air outlet pipe 22; the air outlet pipe 22 is a Y-shaped structure. This arrangement allows the hot air from the air outlet pipe 22 to be more evenly distributed on the guide rail 1.
[0051] Figure 6 The spiral racetrack type oven of the present invention is shown, which includes the above-mentioned baking oven circulation system and a baking room 4. Obviously, the interior of the baking room 4 is a baking chamber. Figure 6-Figure 8 The baking room 4 of the present invention includes a plurality of baking oven panels 41.
[0052] Among them, see Figure 7 The oven storage plate 41 is a hollow structure to form a receiving cavity, and the receiving cavity is filled with heat insulating material to play a role of heat insulation.
[0053] Specifically, the present invention is a spiral racetrack type oven, wherein the baking room 4 includes a plurality of baking room panels 41, wherein the baking room panels 41 are in a long strip structure, a groove 411 is provided on one side of the baking room panel 41, and a convex strip 412 is provided on the side of the baking room panel 41 opposite to the groove 411, wherein the groove 411 and the convex strip 412 both extend along the length direction of the baking room panel 41, and adjacent baking room panels 41 are connected by connecting the convex strip 412 of one of them with the groove 411 of the other one, so that the baking room panels 41 are connected end to end to form a baking room side wall extending in the horizontal direction on the baking room 4. With this arrangement, when the side wall of the baking room is heated, the oven storage plates 41 expand due to the heat and thus squeeze each other. Based on the plug-in structure of the convex strips 412 and the grooves 411, not only the stable support effect of the side wall of the baking room is satisfied, but also because each oven storage plate 41 can expand due to the heat, and when the oven storage plates 41 are heated, the adjacent oven storage plates 41 move away from each other, thereby avoiding local stress concentration and damage to a certain part of the side wall of the baking room.
[0054] It can be understood that the baking room 4 can be an elliptical structure, a rectangular structure or a circular structure. In this embodiment, preferably, the baking room 4 is a rectangular structure, and the four baking room side walls of the baking room 4 are all formed by a plurality of the oven storage panels 41, and the adjacent baking room side walls of the baking room 4 are fixedly connected to each other to ensure the stability of the baking room 4, and at the same time facilitate the independent installation and removal of each baking room side wall, thereby improving the maintenance efficiency.
[0055] As a further preferred embodiment: the width of the groove 411 minus the width of the convex strip 412 is greater than 1 mm, so as to ensure that there is a larger gap between the oven storage plates 41. In this way, when the baking room 4 expands due to heat, after the units constituting the baking room 4 (i.e., the oven storage plates 41) expand, the adjacent oven storage plates 41 will not be squeezed against each other due to the thermal expansion, causing the baking room 4 to deform, thereby extending the service life of the baking room 4.
[0056] As a further preferred embodiment: see Figure 8 and Fig. 9 The baking room 4 further comprises a rectangular parallelepiped frame 42, the rectangular parallelepiped frame 42 has a horizontally placed mounting strip 421, a fixing piece 422 is provided on the side of the baking oven panel 41 facing the inside of the baking room 4, the fixing piece 422 is provided with a positioning groove 423, during installation, each positioning groove 423 is adapted to slide toward the mounting strip 421 in a horizontal direction, so that the convex strip 412 of one of the adjacent baking oven panels 41 is plugged into the groove 411 of the other. In this arrangement, the adjacent baking oven panels 41 are only subjected to contact force, and when the baking oven panels 41 are heated and expanded, the baking oven panels 41 can move along the length direction of the mounting strip 421, thereby avoiding excessive local stress of the baking room 4 due to expansion, thereby extending the service life of the baking room 4.
[0057] As a further preferred embodiment: the mounting strip 421 is convex toward the inner side close to the curing room 4 to form a support strip 424; the curing room 4 also includes a top cover 43, and the top cover 43 is detachably placed on the support strip 424; in this way, when the top cover 43 is heated, it can expand appropriately, thereby avoiding excessive local stress of the top cover 43. The top cover 43 is connected to at least two exhaust fans 5, and the two exhaust fans 5 are respectively located at the two ends of the short axis of the elliptical shape. In this way, the moisture is extracted by the exhaust fans 5, thereby avoiding the accumulation of hot and humid gas overflowed by the heated evaporation of the package in the curing room 4. In addition, since the fire tube 3 is close to the center of the elliptical shape and far away from the end of the long axis of the elliptical shape, by arranging the two exhaust fans 5 at the two ends of the short axis of the elliptical shape, it is beneficial for the gas in the curing room 4 to circulate in an orderly manner. In addition, it should be noted that, since the adjacent oven storage panels 41 are connected by the convex strips 412 of one and the grooves 411 of the other, there is a gap between the adjacent oven storage panels 41, which is conducive to the discharge of heat and moisture in the baking room 4. Figure 7 In order to avoid excessive local stress on the oven storage plate 41, a plurality of through holes 413 connected to the accommodating cavity are opened on the bottom wall of the groove 411, and the through holes 413 are used to resist thermal expansion and contraction.
[0058] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.
Claims
1. A spiral racetrack oven, characterized in that: The spiral racetrack oven comprises a baking room, a guide rail, a transmission carrier, a fan component and a plurality of fire tubes for burning gas to generate heat; the guide rail is wound into a spiral structure along the height direction, and the outer contour of the spiral structure in a top view is elliptical; the transmission carrier is arranged along the extension direction of the guide rail, and the transmission carrier is used to transport the preforms to move along the extension direction of the guide rail, and a plurality of the fire tubes are inserted in the spiral structure along the height direction, and the plurality of the fire tubes are respectively distributed on opposite sides of the long axis of the elliptical shape, and the fire tubes are close to the center of the elliptical shape and away from the end of the long axis of the elliptical shape; the fan component is arranged in the spiral structure, and the fan component is used to guide the airflow from the center of the elliptical shape to the two ends of the long axis of the elliptical shape; The baking room includes a plurality of baking oven panels, and the baking oven panels are in a long strip structure. A groove is provided on one side of the baking oven panel, and a convex strip is provided on the side of the baking oven panel opposite to the groove. The groove and the convex strip both extend along the length direction of the baking oven panel. Adjacent baking oven panels are connected end to end by plugging the convex strip of one of them into the groove of the other one, so that the baking oven panels are connected end to end to form a baking room side wall extending in the horizontal direction on the baking room.
2. A spiral racetrack oven as claimed in claim 1, characterized in that: The baking room is in a rectangular parallelepiped structure, and the four baking room side walls of the baking room are all formed by a plurality of the baking oven storage panels, and the adjacent baking room side walls of the baking room are fixedly connected to each other.
3. The spiral racetrack oven according to claim 1, characterized in that: The width of the groove minus the width of the convex strip is greater than 1 mm.
4. The spiral racetrack oven according to claim 1, characterized in that: The baking room also includes a rectangular frame, which has a horizontally placed mounting bar. A fixing piece is provided on the side of the baking oven storage plate facing the interior of the baking room. The fixing piece is provided with a positioning groove. During installation, each of the positioning grooves is suitable for sliding toward the mounting bar in a horizontal direction so that the convex strip of one of the adjacent baking oven storage plates can be plugged into the groove of the other one.
5. A spiral racetrack oven as claimed in claim 4, characterized in that: The mounting strip protrudes toward the inner side close to the baking room to form a support strip; the baking room also includes a top cover, which is detachably placed on the support strip; the top cover is connected to at least two exhaust fans, and the two exhaust fans are respectively located at both ends of the short axis of the elliptical shape.
6. The spiral racetrack oven according to claim 1, characterized in that: The guide rail includes an inner ring and an outer ring, and the outer contours of the inner ring and the outer ring in a top view are both elliptical. The inner ring is spirally wound upward along the vertical height direction, then spirally wound outward along the horizontal direction, and then spirally wound downward along the vertical direction to form the outer ring; the fire tubes are interspersed in the inner ring and the outer ring.
7. The spiral racetrack oven according to claim 1, characterized in that: The fan component includes an impeller, an air duct and a plurality of air outlet pipes connected to the air duct. The impeller is installed at the center of the elliptical shape and is used to introduce airflow into the air duct. The plurality of air outlet pipes are inserted in the spiral structure along the height direction.
8. The spiral racetrack oven according to claim 7, characterized in that: The plurality of air outlet pipes are respectively arranged at two ends of the long axis of the elliptical shape; The fan component is a centrifugal fan, and a plurality of air guide ducts are provided, each of which is respectively connected to a plurality of air outlet ducts.
9. The spiral racetrack oven according to claim 7, characterized in that: A plurality of the air outlet pipes are provided with a plurality of air outlet side holes, and the plurality of the air outlet side holes are distributed at intervals along the length direction of the air outlet pipe and / or the circumference of the air outlet pipe, and the air outlet pipe is in a Y-shaped structure.
10. The spiral racetrack oven according to claim 1, characterized in that: The fire tube is provided with a plurality of ignition holes, and the plurality of ignition holes are distributed at intervals along the length direction of the fire tube and / or the circumference of the fire tube; The fire tube is in a V-shaped structure, and the corner of the fire tube is closer to the fan component than the two ends of the fire tube; The spiral racetrack oven also includes an air pipe and a gas pipe, wherein the air pipe is connected to the fire pipe after merging with the gas pipe; The air pipe and the gas pipe are controlled by a zero-pressure proportional combustion system.