Natural circulation heat exchange balanced oven

Abstract

This invention is a natural circulation heat exchange balancing oven, comprising: an outer casing, an upper return air duct, a return air conduit, a natural wind regulating box, a heating conduit, a lower air inlet duct, two perforated plates on both sides, an upper perforated plate, a lower partition, an upper partition, a front partition, two side partitions, and a rear partition. This invention, when applied to ultra-large oven systems, features energy saving, rapid cooling, and a low temperature error range.

Description

Technical Field

[0001] This invention relates to an oven structure system for ultra-large ovens, which enables rapid cooling and precise temperature control by regulating the natural airflow in the environment. Prior Technology

[0002] Prior art research focused on a large drying oven for drying semi-finished vegetable products, as disclosed in Chinese Patent Publication No. CN220402937U. This large drying oven for drying semi-finished vegetable products includes a box body, a placement box, and a turning mechanism. The box body has a back panel inside. The turning mechanism includes an electric telescopic rod, a first mounting seat, a second mounting seat, a fixing block, and a rotating rod. The first mounting seat is fixedly connected to the electric telescopic rod and rotatably connected to the box body. The second mounting seat is fixedly connected to the telescopic end of the electric telescopic rod. The fixing block is fixedly connected to the rear side of the back panel and rotatably connected to the second mounting seat. The rotating rod is rotatably connected to both the box body and the back panel. By activating the electric telescopic rod, the telescopic end of the electric telescopic rod drives the second mounting seat to move left and right, thereby driving the back panel to rotate. The rotating rod supports the back panel, thereby causing the placement box to rotate repeatedly, turning the vegetables and drying them evenly, thus improving the drying efficiency. Another prior art relates to a hot air furnace for a large-scale air-distribution oven, as disclosed in Chinese Patent Publication No. CN212133238U. It includes an inner box body, an outer box body, and an end cover. The inner box body is fitted inside the outer box body. The first end of the outer box body is connected to the end cover. The end cover has multiple openings for air intake. At least one opening has an adjustment plate. There is a gap between the first end of the inner box body and the end cover. An air intake channel is formed between the inner box body and the outer box body, which can adjust the air intake volume of cool air, thereby adjusting the temperature inside the hot air furnace, which is beneficial to improving the drying level of the hot air furnace.

[0003] Previous technology has focused on the research of a large drying oven for chemical raw materials, as disclosed in Chinese Patent Publication No. CN218296558U. This oven includes a drying chamber and a sealed door. The sealed door is hinged to the front end of the drying chamber. A drying fan is fixed to the upper end of the drying chamber via a fixing plate. A shaft tube is rotatably connected and communicates with the lower end of the drying fan. A V-shaped screen is fixed to the upper end of the drying chamber. The lower end of the shaft tube rotates through the drying chamber and downwards, passing through the screen. A sweeping plate is fixed to the left end of the shaft tube near the inner wall of the screen. A drive assembly is provided at the upper end of the drying chamber, and a discharge pipe is connected to the lower end. The chemical raw materials are uniformly and comprehensively stirred by the stirring and drying assembly. Combined with multiple first and second hot air nozzles, the stirred chemical raw materials are dried with hot air, which improves the uniformity and comprehensiveness of drying, effectively increasing the drying efficiency of the chemical raw materials and ensuring the quality of the dried chemical raw materials. Another prior art concerning large drying oven equipment, such as the Chinese patent publication number CN211977405U, includes a drying oven body, a refrigeration system, and a combustion chamber. Several transmission rollers are arranged along the length of the drying oven body. An air wall connected to the top wall of the oven is provided above the middle of the transmission rollers, and the air wall divides the interior of the drying oven body into two drying sections. The combustion chamber is arranged along the bottom wall of the drying oven body. The refrigeration system is located at the top of the drying oven body, which can efficiently dry the product and provide a good working environment for the operators.

[0004] Prior art research addresses a large-scale drying oven, as disclosed in Chinese Patent Publication No. CN208720676U. This large-scale drying oven includes a chamber comprising a heating cavity and an outer shell surrounding the heating cavity. A circulating air duct is formed between the heating cavity and the outer shell. Multiple air inlets communicating with the circulating air duct are provided on the cavity wall of the heating cavity, and a material inlet connecting to the outside of the chamber is provided on one side of the heating cavity. Multiple heating units are evenly arranged around the heating cavity, each including a heating element and a temperature sensor. The heating element is controlled by the signal from the temperature sensor. A turntable is provided inside the heating cavity, and the turntable is driven to rotate by a power mechanism. This solves the technical problem of uneven heat treatment of large workpieces in existing drying ovens. Another prior art relates to the research of an energy-saving large-scale drying oven, as disclosed in Chinese Patent Publication No. CN212673688U. It includes an oven body, with a first heat exchange chamber, a first purification chamber, a second purification chamber, and a second heat exchange chamber fixedly connected sequentially from left to right at the upper end of the oven body. Heat exchange tubes are fixedly connected inside both the first and second heat exchange chambers. The front and rear ends of the heat exchange tubes located in the first heat exchange chamber are respectively connected to the exhaust port of the oven body and the inner cavity of the first purification chamber. The front and rear ends of the heat exchange tubes located in the second heat exchange chamber are respectively connected to the air inlet of the oven body and the inner cavity of the second purification chamber. This energy-saving large-scale drying oven has advantages such as energy saving and gas purification, solving the problem that most existing drying ovens do not treat the discharged moisture, which carries a large amount of heat and volatile substances from the dried materials, resulting in resource waste and affecting the air quality of the working environment.

[0005] Prior art relates to a large drying oven for processing metal materials, as disclosed in Chinese Patent Publication No. CN212645131U. This oven includes a box body with an electric hydraulic cylinder fixedly mounted on its front. In this large drying oven, the electric hydraulic cylinder retracts, causing a baffle to rise and exposing the discharge port. The metal material is then pushed to the position corresponding to the front clamping plate, allowing it to enter the front clamping plate. An external force is then applied to the rear clamping plate, causing rollers to move along guide rails towards the metal material. Once the rear clamping plate presses against the metal material, the upper and lower cables are pulled, engaging with hooks to fix the metal material between the front and rear clamping plates. An electric slide rail is then activated, moving the front clamping plate. Under the influence of the metal material's own weight, the front clamping plate rotates around a hinge, causing the metal material to tilt and the rear clamping plate to rotate. Once the metal material is placed vertically, the baffle is closed for drying, achieving thorough drying. Summary of the Invention

[0006] This invention relates to a natural circulation heat exchange equilibrium oven, comprising: an outer casing having a receiving space and a door, wherein the receiving space is isolated from the external environment and the door is used to open and close the receiving space, the volume of which is greater than or equal to 10 cubic meters; an upper return air duct, which is a hollow pipe with two ends connected to the top of the outer casing and drawing airflow from the receiving space; a return air duct, which is also a hollow pipe, passing through the lower part of the upper return air duct and guiding airflow into the upper return air duct; and a self-contained air supply system. A natural wind control box, which is a hollow box body, is connected to the lower part of the return air duct and guides the airflow into the return air duct. It has an opening on one side and at least one regulating plate, which communicates with the external environment. The regulating plate has multiple perforations on the opening. A heating duct, which is a hollow pipe, is connected to the lower part of the natural wind control box and guides the airflow into the box. It has at least one heater inside to heat the airflow. A lower air inlet duct, which is also a hollow pipe. One end of the heating pipe passes through the lower part of the heating pipe, and two other branch ends pass through the lower part of the outer casing, sending the airflow from the heating pipe into the accommodating space; two perforated plates, each with multiple holes, are disposed on the lower two sides of the accommodating space; an upper perforated plate, also with multiple holes, is disposed at the top of the accommodating space; a lower partition is disposed in the lower part of the accommodating space and is perpendicularly adjacent to the outer casing; an upper partition is disposed in the upper part of the accommodating space and is perpendicularly adjacent to the outer casing. The enclosure comprises: a front partition, which is located at the front of the accommodating space and perpendicularly adjacent to the outer casing; two side partitions, which are located on both sides of the accommodating space, parallel and spaced apart from the outer casing, and spaced apart from the lower and upper partitions to create a passage, and are connected above the perforated side plate and joined to the front partition; and a rear partition, which is located at the rear of the accommodating space, parallel and spaced apart from the outer casing, and spaced apart from the lower and upper partitions to create a passage, and is adjacent to and joined to the two side partitions and the two perforated side plates. The accommodating space of the outer casing, under a temperature range of 35~200°C, has a temperature distribution error of less than or equal to ±1.5°C when unloaded, a heating rate greater than or equal to 1°C / minute, and a cooling rate greater than or equal to 5°C / hour. The outer casing, the upper return air duct, the return air duct, the natural wind regulating box, the heating duct, and the lower inlet air duct are all lined with heat-insulating material. The return air duct is equipped with a blower that propels airflow. The natural wind regulating box has multiple regulating plates that are stacked and staggered to control the airflow through the side opening connecting to the external environment. The natural wind regulating box also has multiple regulating plates arranged at intervals to control the airflow through the side opening connecting to the external environment.The heating conduit contains at least one heater, which can be a quartz heating tube, a resistance heating element, a far-infrared heating element, a ceramic heating element, a steam or hot water heater, or a combustion heating element. The side perforated plate and the upper perforated plate have a plurality of holes, the size of which is progressively distributed. These holes are rectangular or circular. This invention, applied to ultra-large oven systems, features energy saving, rapid cooling, and a low temperature error range. Its structure differs from conventional techniques, demonstrating novelty, progress, and practical benefits. A preferred embodiment and accompanying drawings are provided below for detailed explanation of the techniques, methods, and effects employed in this invention. This will provide a deeper and more concrete understanding of the aforementioned objectives, structure, and features of this invention. Simple Explanation of the Diagram

[0007] Figure 1 shows a three-dimensional view of the natural circulation heat exchange equilibrium oven of this creation. Figure 2 shows a front view of the natural circulation heat exchange equilibrium oven of this creation. Figure 3 shows a side view of the natural circulation heat exchange equilibrium oven of this creation. Figure 4 shows a top view of the natural circulation heat exchange equilibrium oven of this creation. Figure 5 shows a schematic diagram of the airflow inside the natural circulation heat exchange balance oven of this creation. Figure 6 shows a schematic diagram of the airflow within the return air system of the natural circulation heat exchange balance oven of this creation. Figure 7 shows a three-dimensional view of the natural wind regulating chamber of the natural circulation heat exchange balance oven of this creation. Figure 8 shows a front view of the natural wind regulating chamber of the natural circulation heat exchange balance oven of this creation. Figure 9 shows a top view of the natural wind regulating chamber of the natural circulation heat exchange balance oven of this creation. Implementation

[0008] The following describes the implementation of this invention through specific embodiments. Those skilled in the art can easily understand the other advantages and effects of this invention from the content disclosed in this specification. This invention can also be implemented or applied through other different embodiments, and the details in this specification can also be modified and changed based on different viewpoints and applications without departing from the spirit of this invention.

[0009] Please refer to Figures 1-4, which show the perspective, front view, side view, and top view of this invention, a natural circulation heat exchange balancing oven. This invention is a natural circulation heat exchange balancing oven, comprising: an outer casing 101, which has a receiving space and a door 1011, wherein the receiving space is isolated from the external environment, and the door 1011 is used to open and close the receiving space. The volume of the receiving space is greater than or equal to 10 cubic meters, preferably greater than or equal to 20 cubic meters. This invention can effectively control the temperature range of the receiving space of a very large-volume oven; and an upper return air duct 201, which is a hollow pipe with two split ports connected to the outer casing. Above 101, and draws airflow from the accommodating space; a return air duct 301, which is a hollow pipe, passes through the lower part of the upper return air duct 201 and guides the airflow into the upper return air duct 201; a natural wind regulating box 401, which is a hollow box, passes through the lower part of the return air duct 301 and guides the airflow into the return air duct 301, and is provided with a side opening 4011 and at least one regulating plate 4012, the side opening 4011 communicating with the external environment, the regulating plate 4012 having multiple holes 4013 and being provided on the side opening 4011; a heating duct 501, which is a hollow pipe, passes through the natural wind... Below the regulating box 401, airflow is introduced into the natural wind regulating box 401, and at least one heater 5011 is installed inside to heat the airflow introduced into the natural wind regulating box 401; a lower air inlet duct 601, which is a hollow pipe, has one end connected to the lower part of the heating duct 501 and two other branches connected to the lower part of the outer casing 101, and sends the airflow in the heating duct 501 into the accommodating space; two perforated plates 701, each with a plurality of holes 7011, are disposed on the lower two sides of the accommodating space; an upper perforated plate 801, each with a plurality of holes 8011, is disposed at the top of the accommodating space. A lower partition 901 is disposed in the lower part of the accommodating space and is perpendicularly adjacent to the outer casing 101; an upper partition 1001 is disposed in the upper part of the accommodating space and is perpendicularly adjacent to the outer casing 101; a front partition 1101 is disposed in the front of the accommodating space and is perpendicularly adjacent to the outer casing 101; two side partitions 1201 are disposed on both sides of the accommodating space, parallel and spaced apart from the outer casing 101, and are spaced apart from the lower partition 901 and the upper partition 1001 to separate channels, and are assembled above the side perforated plate 701 and joined to the front partition 1101;A rear partition 1301 is disposed at the rear of the accommodating space, parallel and spaced apart from the outer casing 101, and spaced apart from the lower partition 901 and the upper partition 1001 to separate a passage, and adjacent to and joined to the two side partitions 1201 and the two side perforated plates 701.

[0010] The outer casing 101, within a temperature range of 35~200°C, exhibits a temperature distribution error of less than or equal to ±1.5°C under no-load conditions, a heating rate greater than or equal to 1°C / minute, and a cooling rate greater than or equal to 5°C / hour. Thermal insulation material is installed inside the outer casing 101, the upper return air duct 201, the return air duct 301, the natural wind regulating box 401, the heating duct 501, and the lower air inlet duct 601. A blower 3011 is installed in the return air duct 301 to propel airflow. The natural wind regulating box 401 is equipped with multiple regulating plates 4012, which are stacked and staggered to control the airflow through the side opening 4011 connecting to the external environment. The natural wind regulating box 401 is provided with a plurality of regulating plates 4012, which are arranged at intervals to regulate the air volume of the side opening 4011 in communication with the external environment.

[0011] The heating conduit 501 contains at least one heater 5011, which can be a quartz heating tube, a resistance heating element, a far-infrared heating element, a ceramic heating element, a steam or hot water heater 5011, or a combustion heating element. The side perforated plate 701 and the upper perforated plate 801 have a plurality of holes 7011 and 8011, the sizes of which are progressively distributed. The side perforated plate 701 and the upper perforated plate 801 have a plurality of holes 7011 and 8011, which are rectangular or circular.

[0012] To help the review committee better understand the airflow in the actual application scenario of this invention, Figure 5 shows a schematic diagram of the airflow inside the natural circulation heat exchange equilibrium oven of this invention, and is accompanied by the component symbols in Figure 2. The perspective view of the outer box 101 and the box door 1011 is presented with dashed lines, and the direction of airflow is indicated by dotted dashed arrows. The interior of the box is divided into a temperature-balanced environment space by the side perforated plate 701, the upper perforated plate 801, the front partition 1101, the side partition 1201, and the rear partition 1301. Airflow flows into this temperature-balanced environment space from the side perforated plate 701. The airflow is driven upward to circulate to the side partition 1201 and the rear partition 1301, and finally discharged on the upper perforated plate 801 into the space separated by the front partition 1101 and the upper partition 1001, and then guided into the upper return air duct 201. Referring to Figure 6, which shows a schematic diagram of the airflow within the return air system of the natural circulation heat exchange balance oven of this invention, and in conjunction with the component symbols in Figure 2, the upper return air duct 201 introduces airflow, which is then sent to the return air duct 301. The return air duct 301 is equipped with a blower 3011 to pressurize the airflow, which is then sent into the natural air conditioning box 401. The natural air conditioning box 401 has a side opening 4011 at its rear, which provides ambient air into the natural air conditioning box 401 to provide necessary cooling air as needed. The airflow in the natural air conditioning box 401 is then conveyed into the heating duct 501, which is equipped with a heater 5011 to heat the airflow as needed. The airflow in the heating duct 501 is then delivered to the lower air inlet duct 601, and the airflow is sent into the space separated by the lower partition 901 and the front partition 1101. The airflow is then guided into the side perforated plate 701 and flows into the temperature-balanced ambient space through the holes 7011 of the side perforated plate 701 to complete the natural circulation of airflow.

[0013] Figure 7 shows a perspective view of the natural air conditioning chamber of the natural circulation heat exchange balancing oven of this invention. The natural air conditioning chamber 401 is a hollow chamber with a side opening 4011 and at least one regulating plate 4012. The side opening 4011 communicates with the external environment. The regulating plate 4012 has multiple holes 4013 disposed on the side opening 4011. The side opening 4011 allows ambient air to be supplied into the natural air conditioning chamber 401 to provide necessary cooling air as needed, and guides the airflow into the return air duct 301, providing a temperature-balanced environment that can be rapidly cooled. The natural air conditioning chamber 401 has multiple regulating plates 4012, and the regulating plates 4012 have holes 4013 to allow the adjustment of the amount of ambient air supplied into the natural air conditioning chamber 401. Figure 8 shows a front view of the natural air conditioning chamber of the natural circulation heat exchange balancing oven of this invention. The regulating plates 4012 are stacked and staggered to control the airflow connecting the side opening 4011 to the external environment. Figure 9 shows a top view of the natural airflow regulating chamber of the present invention's natural circulation heat exchange balance oven. The natural airflow regulating chamber 401 is equipped with a plurality of regulating plates 4012, which are arranged at intervals to control the airflow connecting the side opening 4011 to the external environment.

[0014] This invention relates to an ultra-large drying oven system characterized by energy saving, rapid cooling, and a low temperature error range. It differs significantly from conventional techniques, demonstrating novelty, advancement, and practical benefits. Therefore, it effectively addresses the shortcomings of existing technologies and possesses considerable practical applicability.

[0015] In summary, the specific structure disclosed in this invention embodiment can indeed provide the application of rapid cooling and uniform and stable temperature control for ultra-large oven systems. In terms of its overall structure, it has never been seen in similar products, nor has it been disclosed before the application. It has indeed met the statutory requirements of the Patent Law, and therefore, an invention patent application is filed in accordance with the law.

[0016] However, the above description is only one preferred embodiment of this invention and should not be construed as limiting the scope of this invention. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the invention specification should still fall within the scope of this invention.

[0017] 101:Outer box 1011: Box Door 201: Top and Return Air Ducts 301: Return air duct 3011: Blower 401: Natural wind control box 4011: Side opening 4012: Adjustment plate 4013: Hole 501: Heating pipe 5011: Heater 601: Bottom Inlet Duct 701: Side-mounted perforated plate 7011: Hole 801: Upper perforated plate 8011: Hole 901: Lower partition 1001: Upper partition 1101: Front partition 1201: Side partition 1301: Rear partition

Claims

1. A natural circulation heat exchange equilibrium oven, comprising: an outer casing having a receiving space and a door, wherein the receiving space is isolated from the external environment, and the door is used to open and close the receiving space, the volume of the receiving space being greater than or equal to 10 cubic meters, the temperature distribution error of the receiving space of the outer casing under no-load conditions within a temperature range of 35–200°C being less than or equal to ±1.5°C, the heating rate being greater than or equal to 1°C / minute, and the cooling rate being greater than or equal to 5°C / hour; an upper return air duct, the upper return air duct being a hollow pipe, with two ends connected to the upper outer casing and drawing airflow from the receiving space; and a return air duct, the return air duct being a hollow pipe, passing through the lower part of the upper return air duct and guiding airflow into the upper return air duct; A natural wind regulating box, which is a hollow box body, is connected to the lower part of the return air duct and guides the airflow into the return air duct. It is provided with an opening on one side and at least one regulating plate. The opening on the side is connected to the external environment. The regulating plate has multiple holes and is provided on the opening on the side. A heating duct, which is a hollow pipe, is connected to the lower part of the natural wind regulating box and guides the airflow into the natural wind regulating box. It is provided with at least one heater inside to heat the airflow guided into the natural wind regulating box. A lower air inlet duct, which is a hollow pipe, has one end connected to the lower part of the heating duct and two other branches connected to the lower part of the outer box, and sends the airflow in the heating duct into the accommodating space. Two perforated plates, which have multiple holes, are provided on the lower two sides of the accommodating space. An upper perforated plate, which has multiple holes, is provided on the top of the accommodating space. The enclosure comprises: a lower partition, which is located at the lower part of the accommodating space and is perpendicularly adjacent to the outer casing; an upper partition, which is located at the upper part of the accommodating space and is perpendicularly adjacent to the outer casing; a front partition, which is located at the front of the accommodating space and is perpendicularly adjacent to the outer casing; two side partitions, which are located on both sides of the accommodating space, parallel to and spaced apart from the outer casing, and are spaced apart from the lower and upper partitions to create a passage, and are assembled above the perforated side plate and joined to the front partition; and a rear partition, which is located at the rear of the accommodating space, parallel to and spaced apart from the outer casing, and is spaced apart from the lower and upper partitions to create a passage, and is adjacent to and joined to the two side partitions and the two perforated side plates.

2. The natural circulation heat exchange balancing oven as described in claim 1, wherein, The outer casing, the upper return air duct, the return air duct, the natural wind regulating box, the heating duct, and the lower air inlet duct are provided with heat insulation material on their inner sides.

3. The natural circulation heat exchange balancing oven as described in claim 1, wherein, The return air duct is equipped with a blower that propels the airflow.

4. The natural circulation heat exchange balancing oven as described in claim 1, wherein, The natural wind control box is equipped with multiple adjustment plates that are stacked and staggered to regulate the airflow between the side opening and the external environment.

5. The natural circulation heat exchange balancing oven as described in claim 1, wherein, The natural wind control box is equipped with multiple regulating plates, which are arranged at intervals to regulate the airflow between the side opening and the external environment.

6. The natural circulation heat exchange balancing oven as described in claim 1, wherein, The heating conduit is equipped with at least one heater, which can be a quartz heating tube, a resistance heating element, a far-infrared heating element, a ceramic heating element, a steam or hot water heater, or a combustion heating element.

7. The natural circulation heat exchange balancing oven as described in claim 1, wherein, The perforated plate on the side and the perforated plate on the upper side have a plurality of holes, the size of which is distributed in a progressive manner.

8. The natural circulation heat exchange balancing oven as described in claim 1, wherein, The perforated plate on this side and the perforated plate on the upper side have a plurality of holes, which are rectangular or circular.

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